+++ /dev/null
-/*
- * PERM_OPTIONS are driver options which will be enabled for all NCR boards
- * in the system at driver initialization time.
- *
- * Don't THINK about touching these in PERM_OPTIONS :
- * OPTION_IO_MAPPED
- * Memory mapped IO does not work under i86 Linux.
- *
- * OPTION_DEBUG_TEST1
- * Test 1 does bus mastering and interrupt tests, which will help weed
- * out brain damaged main boards.
- *
- * These are development kernel changes. Code for them included in this
- * driver release may or may not work. If you turn them on, you should be
- * running the latest copy of the development sources from
- *
- * ftp://tsx-11.mit.edu/pub/linux/ALPHA/scsi/53c7,8xx
- *
- * and be subscribed to the ncr53c810@colorado.edu mailing list. To
- * subscribe, send mail to majordomo@colorado.edu with
- *
- * subscribe ncr53c810
- *
- * in the text.
- *
- *
- * OPTION_NO_ASYNC
- * Don't negotiate for asynchronous transfers on the first command
- * when OPTION_ALWAYS_SYNCHRONOUS is set. Useful for dain bramaged
- * devices which do something bad rather than sending a MESSAGE
- * REJECT back to us like they should if they can't cope.
- *
- * OPTION_SYNCHRONOUS
- * Enable support for synchronous transfers. Target negotiated
- * synchronous transfers will be responded to. To initiate
- * a synchronous transfer request, call
- *
- * request_synchronous (hostno, target)
- *
- * from within KGDB.
- *
- * OPTION_ALWAYS_SYNCHRONOUS
- * Negotiate for synchronous transfers with every target after
- * driver initialization or a SCSI bus reset. This is a bit dangerous,
- * since there are some dain bramaged SCSI devices which will accept
- * SDTR messages but keep talking asynchronously.
- *
- * OPTION_DISCONNECT
- * Enable support for disconnect/reconnect. To change the
- * default setting on a given host adapter, call
- *
- * request_disconnect (hostno, allow)
- *
- * where allow is non-zero to allow, 0 to disallow.
- *
- * If you really want to run 10MHz FAST SCSI-II transfers, you should
- * know that the NCR driver currently ignores parity information. Most
- * systems do 5MHz SCSI fine. I've seen a lot that have problems faster
- * than 8MHz. To play it safe, we only request 5MHz transfers.
- *
- * If you'd rather get 10MHz transfers, edit sdtr_message and change
- * the fourth byte from 50 to 25.
- */
-
-#error Please convert me to Documentation/DMA-mapping.txt
-
-#include <linux/config.h>
-
-#ifdef CONFIG_SCSI_NCR53C7xx_sync
-#ifdef CONFIG_SCSI_NCR53C7xx_DISCONNECT
-#define PERM_OPTIONS (OPTION_IO_MAPPED|OPTION_DEBUG_TEST1|OPTION_DISCONNECT|\
- OPTION_SYNCHRONOUS|OPTION_ALWAYS_SYNCHRONOUS)
-#else
-#define PERM_OPTIONS (OPTION_IO_MAPPED|OPTION_DEBUG_TEST1|\
- OPTION_SYNCHRONOUS|OPTION_ALWAYS_SYNCHRONOUS)
-#endif
-#else
-#ifdef CONFIG_SCSI_NCR53C7xx_DISCONNECT
-#define PERM_OPTIONS (OPTION_IO_MAPPED|OPTION_DEBUG_TEST1|OPTION_DISCONNECT|\
- OPTION_SYNCHRONOUS)
-#else
-#define PERM_OPTIONS (OPTION_IO_MAPPED|OPTION_DEBUG_TEST1|OPTION_SYNCHRONOUS)
-#endif
-#endif
-
-/*
- * Sponsored by
- * iX Multiuser Multitasking Magazine
- * Hannover, Germany
- * hm@ix.de
- *
- * Copyright 1993, 1994, 1995 Drew Eckhardt
- * Visionary Computing
- * (Unix and Linux consulting and custom programming)
- * drew@PoohSticks.ORG
- * +1 (303) 786-7975
- *
- * TolerANT and SCSI SCRIPTS are registered trademarks of NCR Corporation.
- *
- * For more information, please consult
- *
- * NCR53C810
- * SCSI I/O Processor
- * Programmer's Guide
- *
- * NCR 53C810
- * PCI-SCSI I/O Processor
- * Data Manual
- *
- * NCR 53C810/53C820
- * PCI-SCSI I/O Processor Design In Guide
- *
- * For literature on Symbios Logic Inc. formerly NCR, SCSI,
- * and Communication products please call (800) 334-5454 or
- * (719) 536-3300.
- *
- * PCI BIOS Specification Revision
- * PCI Local Bus Specification
- * PCI System Design Guide
- *
- * PCI Special Interest Group
- * M/S HF3-15A
- * 5200 N.E. Elam Young Parkway
- * Hillsboro, Oregon 97124-6497
- * +1 (503) 696-2000
- * +1 (800) 433-5177
- */
-
-/*
- * Design issues :
- * The cumulative latency needed to propagate a read/write request
- * through the file system, buffer cache, driver stacks, SCSI host, and
- * SCSI device is ultimately the limiting factor in throughput once we
- * have a sufficiently fast host adapter.
- *
- * So, to maximize performance we want to keep the ratio of latency to data
- * transfer time to a minimum by
- * 1. Minimizing the total number of commands sent (typical command latency
- * including drive and bus mastering host overhead is as high as 4.5ms)
- * to transfer a given amount of data.
- *
- * This is accomplished by placing no arbitrary limit on the number
- * of scatter/gather buffers supported, since we can transfer 1K
- * per scatter/gather buffer without Eric's cluster patches,
- * 4K with.
- *
- * 2. Minimizing the number of fatal interrupts serviced, since
- * fatal interrupts halt the SCSI I/O processor. Basically,
- * this means offloading the practical maximum amount of processing
- * to the SCSI chip.
- *
- * On the NCR53c810/820/720, this is accomplished by using
- * interrupt-on-the-fly signals when commands complete,
- * and only handling fatal errors and SDTR / WDTR messages
- * in the host code.
- *
- * On the NCR53c710, interrupts are generated as on the NCR53c8x0,
- * only the lack of an interrupt-on-the-fly facility complicates
- * things. Also, SCSI ID registers and commands are
- * bit fielded rather than binary encoded.
- *
- * On the NCR53c700 and NCR53c700-66, operations that are done via
- * indirect, table mode on the more advanced chips must be
- * replaced by calls through a jump table which
- * acts as a surrogate for the DSA. Unfortunately, this
- * will mean that we must service an interrupt for each
- * disconnect/reconnect.
- *
- * 3. Eliminating latency by pipelining operations at the different levels.
- *
- * This driver allows a configurable number of commands to be enqueued
- * for each target/lun combination (experimentally, I have discovered
- * that two seems to work best) and will ultimately allow for
- * SCSI-II tagged queuing.
- *
- *
- * Architecture :
- * This driver is built around a Linux queue of commands waiting to
- * be executed, and a shared Linux/NCR array of commands to start. Commands
- * are transferred to the array by the run_process_issue_queue() function
- * which is called whenever a command completes.
- *
- * As commands are completed, the interrupt routine is triggered,
- * looks for commands in the linked list of completed commands with
- * valid status, removes these commands from a list of running commands,
- * calls the done routine, and flags their target/luns as not busy.
- *
- * Due to limitations in the intelligence of the NCR chips, certain
- * concessions are made. In many cases, it is easier to dynamically
- * generate/fix-up code rather than calculate on the NCR at run time.
- * So, code is generated or fixed up for
- *
- * - Handling data transfers, using a variable number of MOVE instructions
- * interspersed with CALL MSG_IN, WHEN MSGIN instructions.
- *
- * The DATAIN and DATAOUT routines are separate, so that an incorrect
- * direction can be trapped, and space isn't wasted.
- *
- * It may turn out that we're better off using some sort
- * of table indirect instruction in a loop with a variable
- * sized table on the NCR53c710 and newer chips.
- *
- * - Checking for reselection (NCR53c710 and better)
- *
- * - Handling the details of SCSI context switches (NCR53c710 and better),
- * such as reprogramming appropriate synchronous parameters,
- * removing the dsa structure from the NCR's queue of outstanding
- * commands, etc.
- *
- */
-
-/*
- * Accommodate differences between stock 1.2.x and 1.3.x asm-i386/types.h
- * so lusers can drop in 53c7,8xx.* and get something which compiles
- * without warnings.
- */
-
-#include <linux/version.h>
-
-#include <linux/module.h>
-
-#include <asm/dma.h>
-#include <asm/io.h>
-#include <asm/system.h>
-#include <linux/delay.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/errno.h>
-#include <linux/pci.h>
-#include <linux/proc_fs.h>
-#include <linux/string.h>
-#include <linux/slab.h>
-#include <linux/vmalloc.h>
-#include <linux/mm.h>
-#include <linux/ioport.h>
-#include <linux/time.h>
-#include <linux/blk.h>
-#include <linux/init.h>
-#include <linux/spinlock.h>
-
-#include "scsi.h"
-#include "hosts.h"
-#include "53c7,8xx.h"
-#include <linux/stat.h>
-#include <linux/stddef.h>
-
-static int check_address (unsigned long addr, int size);
-static void dump_events (struct Scsi_Host *host, int count);
-static Scsi_Cmnd * return_outstanding_commands (struct Scsi_Host *host,
- int free, int issue);
-static void hard_reset (struct Scsi_Host *host);
-static void ncr_scsi_reset (struct Scsi_Host *host);
-static void print_lots (struct Scsi_Host *host);
-static void set_synchronous (struct Scsi_Host *host, int target, int sxfer,
- int scntl3, int now_connected);
-static int datapath_residual (struct Scsi_Host *host);
-static const char * sbcl_to_phase (int sbcl);
-static void print_progress (Scsi_Cmnd *cmd);
-static void print_queues (struct Scsi_Host *host);
-static void process_issue_queue (unsigned long flags);
-static int shutdown (struct Scsi_Host *host);
-static void abnormal_finished (struct NCR53c7x0_cmd *cmd, int result);
-static int disable (struct Scsi_Host *host);
-static int NCR53c8xx_run_tests (struct Scsi_Host *host);
-static int NCR53c8xx_script_len;
-static int NCR53c8xx_dsa_len;
-static void NCR53c7x0_intr(int irq, void *dev_id, struct pt_regs * regs);
-static void do_NCR53c7x0_intr(int irq, void *dev_id, struct pt_regs * regs);
-static int ncr_halt (struct Scsi_Host *host);
-static void intr_phase_mismatch (struct Scsi_Host *host, struct NCR53c7x0_cmd
- *cmd);
-static void intr_dma (struct Scsi_Host *host, struct NCR53c7x0_cmd *cmd);
-static void print_dsa (struct Scsi_Host *host, u32 *dsa,
- const char *prefix);
-static int print_insn (struct Scsi_Host *host, const u32 *insn,
- const char *prefix, int kernel);
-
-static void NCR53c8xx_dsa_fixup (struct NCR53c7x0_cmd *cmd);
-static void NCR53c8x0_init_fixup (struct Scsi_Host *host);
-static int NCR53c8x0_dstat_sir_intr (struct Scsi_Host *host, struct
- NCR53c7x0_cmd *cmd);
-static void NCR53c8x0_soft_reset (struct Scsi_Host *host);
-
-/* INSMOD variables */
-static long long perm_options = PERM_OPTIONS;
-/* 14 = .5s; 15 is max; decreasing divides by two. */
-static int selection_timeout = 14;
-/* Size of event list (per host adapter) */
-static int track_events = 0;
-
-static struct Scsi_Host *first_host = NULL; /* Head of list of NCR boards */
-static Scsi_Host_Template *the_template = NULL;
-
-/*
- * KNOWN BUGS :
- * - There is some sort of conflict when the PPP driver is compiled with
- * support for 16 channels?
- *
- * - On systems which predate the 1.3.x initialization order change,
- * the NCR driver will cause Cannot get free page messages to appear.
- * These are harmless, but I don't know of an easy way to avoid them.
- *
- * - With OPTION_DISCONNECT, on two systems under unknown circumstances,
- * we get a PHASE MISMATCH with DSA set to zero (suggests that we
- * are occurring somewhere in the reselection code) where
- * DSP=some value DCMD|DBC=same value.
- *
- * Closer inspection suggests that we may be trying to execute
- * some portion of the DSA?
- * scsi0 : handling residual transfer (+ 0 bytes from DMA FIFO)
- * scsi0 : handling residual transfer (+ 0 bytes from DMA FIFO)
- * scsi0 : no current command : unexpected phase MSGIN.
- * DSP=0x1c46cc, DCMD|DBC=0x1c46ac, DSA=0x0
- * DSPS=0x0, TEMP=0x1c3e70, DMODE=0x80
- * scsi0 : DSP->
- * 001c46cc : 0x001c46cc 0x00000000
- * 001c46d4 : 0x001c5ea0 0x000011f8
- *
- * Changed the print code in the phase_mismatch handler so
- * that we call print_lots to try to diagnose this.
- *
- */
-
-/*
- * Possible future direction of architecture for max performance :
- *
- * We're using a single start array for the NCR chip. This is
- * sub-optimal, because we cannot add a command which would conflict with
- * an executing command to this start queue, and therefore must insert the
- * next command for a given I/T/L combination after the first has completed;
- * incurring our interrupt latency between SCSI commands.
- *
- * To allow further pipelining of the NCR and host CPU operation, we want
- * to set things up so that immediately on termination of a command destined
- * for a given LUN, we get that LUN busy again.
- *
- * To do this, we need to add a 32 bit pointer to which is jumped to
- * on completion of a command. If no new command is available, this
- * would point to the usual DSA issue queue select routine.
- *
- * If one were, it would point to a per-NCR53c7x0_cmd select routine
- * which starts execution immediately, inserting the command at the head
- * of the start queue if the NCR chip is selected or reselected.
- *
- * We would change so that we keep a list of outstanding commands
- * for each unit, rather than a single running_list. We'd insert
- * a new command into the right running list; if the NCR didn't
- * have something running for that yet, we'd put it in the
- * start queue as well. Some magic needs to happen to handle the
- * race condition between the first command terminating before the
- * new one is written.
- *
- * Potential for profiling :
- * Call do_gettimeofday(struct timeval *tv) to get 800ns resolution.
- */
-
-
-/*
- * TODO :
- * 1. To support WIDE transfers, not much needs to happen. We
- * should do CHMOVE instructions instead of MOVEs when
- * we have scatter/gather segments of uneven length. When
- * we do this, we need to handle the case where we disconnect
- * between segments.
- *
- * 2. Currently, when Icky things happen we do a FATAL(). Instead,
- * we want to do an integrity check on the parts of the NCR hostdata
- * structure which were initialized at boot time; FATAL() if that
- * fails, and otherwise try to recover. Keep track of how many
- * times this has happened within a single SCSI command; if it
- * gets excessive, then FATAL().
- *
- * 3. Parity checking is currently disabled, and a few things should
- * happen here now that we support synchronous SCSI transfers :
- * 1. On soft-reset, we should set the EPC (Enable Parity Checking)
- * and AAP (Assert SATN/ on parity error) bits in SCNTL0.
- *
- * 2. We should enable the parity interrupt in the SIEN0 register.
- *
- * 3. intr_phase_mismatch() needs to believe that message out is
- * always an "acceptable" phase to have a mismatch in. If
- * the old phase was MSG_IN, we should send a MESSAGE PARITY
- * error. If the old phase was something else, we should send
- * a INITIATOR_DETECTED_ERROR message. Note that this could
- * cause a RESTORE POINTERS message; so we should handle that
- * correctly first. Instead, we should probably do an
- * initiator_abort.
- *
- * 4. MPEE bit of CTEST4 should be set so we get interrupted if
- * we detect an error.
- *
- *
- * 5. The initial code has been tested on the NCR53c810. I don't
- * have access to NCR53c700, 700-66 (Forex boards), NCR53c710
- * (NCR Pentium systems), NCR53c720, NCR53c820, or NCR53c825 boards to
- * finish development on those platforms.
- *
- * NCR53c820/825/720 - need to add wide transfer support, including WDTR
- * negotiation, programming of wide transfer capabilities
- * on reselection and table indirect selection.
- *
- * NCR53c710 - need to add fatal interrupt or GEN code for
- * command completion signaling. Need to modify all
- * SDID, SCID, etc. registers, and table indirect select code
- * since these use bit fielded (ie 1<<target) instead of
- * binary encoded target ids. Need to accommodate
- * different register mappings, probably scan through
- * the SCRIPT code and change the non SFBR register operand
- * of all MOVE instructions.
- *
- * NCR53c700/700-66 - need to add code to refix addresses on
- * every nexus change, eliminate all table indirect code,
- * very messy.
- *
- * 6. The NCR53c7x0 series is very popular on other platforms that
- * could be running Linux - ie, some high performance AMIGA SCSI
- * boards use it.
- *
- * So, I should include #ifdef'd code so that it is
- * compatible with these systems.
- *
- * Specifically, the little Endian assumptions I made in my
- * bit fields need to change, and if the NCR doesn't see memory
- * the right way, we need to provide options to reverse words
- * when the scripts are relocated.
- *
- * 7. Use ioremap() to access memory mapped boards.
- */
-
-/*
- * Allow for simultaneous existence of multiple SCSI scripts so we
- * can have a single driver binary for all of the family.
- *
- * - one for NCR53c700 and NCR53c700-66 chips (not yet supported)
- * - one for rest (only the NCR53c810, 815, 820, and 825 are currently
- * supported)
- *
- * So that we only need two SCSI scripts, we need to modify things so
- * that we fixup register accesses in READ/WRITE instructions, and
- * we'll also have to accommodate the bit vs. binary encoding of IDs
- * with the 7xx chips.
- */
-
-/*
- * Use pci_chips_ids to translate in both directions between PCI device ID
- * and chip numbers.
- */
-
-static struct {
- unsigned short pci_device_id;
- int chip;
-/*
- * The revision field of the PCI_CLASS_REVISION register is compared
- * against each of these fields if the field is not -1. If it
- * is less than min_revision or larger than max_revision, a warning
- * message is printed.
- */
- int max_revision;
- int min_revision;
-} pci_chip_ids[] = {
- {PCI_DEVICE_ID_NCR_53C810, 810, 2, 1},
- {PCI_DEVICE_ID_NCR_53C815, 815, 3, 2},
- {PCI_DEVICE_ID_NCR_53C820, 820, -1, -1},
- {PCI_DEVICE_ID_NCR_53C825, 825, -1, -1}
-};
-
-#define NPCI_CHIP_IDS (sizeof (pci_chip_ids) / sizeof(pci_chip_ids[0]))
-
-#define ROUNDUP(adr,type) \
- ((void *) (((long) (adr) + sizeof(type) - 1) & ~(sizeof(type) - 1)))
-
-/*
- * Forced detection and autoprobe code for various hardware. Currently,
- * entry points for these are not included in init/main.c because if the
- * PCI BIOS code isn't working right, you're not going to be able to use
- * the hardware anyways; this way we force users to solve their
- * problems rather than forcing detection and blaming us when it
- * does not work.
- */
-
-static struct override {
- int chip; /* 700, 70066, 710, 720, 810, 820 */
- int board; /* Any special board level gunk */
- unsigned pci:1;
- union {
- struct {
- int base; /* Memory address - indicates memory mapped regs */
- int io_port;/* I/O port address - indicates I/O mapped regs */
- int irq; /* IRQ line */
- int dma; /* DMA channel - often none */
- } normal;
- struct {
- int bus;
- int device;
- int function;
- } pci;
- } data;
- long long options;
-} overrides [4] = {{0,},};
-static int commandline_current = 0;
-static int no_overrides = 0;
-
-#if 0
-#define OVERRIDE_LIMIT (sizeof(overrides) / sizeof(struct override))
-#else
-#define OVERRIDE_LIMIT commandline_current
-#endif
-
-/*
- * Function: issue_to_cmd
- *
- * Purpose: convert jump instruction in issue array to NCR53c7x0_cmd
- * structure pointer.
- *
- * Inputs; issue - pointer to start of NOP or JUMP instruction
- * in issue array.
- *
- * Returns: pointer to command on success; 0 if opcode is NOP.
- */
-
-static inline struct NCR53c7x0_cmd *
-issue_to_cmd (struct Scsi_Host *host, struct NCR53c7x0_hostdata *hostdata,
- u32 *issue)
-{
- return (issue[0] != hostdata->NOP_insn) ?
- /*
- * If the IF TRUE bit is set, it's a JUMP instruction. The
- * operand is a bus pointer to the dsa_begin routine for this DSA. The
- * dsa field of the NCR53c7x0_cmd structure starts with the
- * DSA code template. By converting to a virtual address,
- * subtracting the code template size, and offset of the
- * dsa field, we end up with a pointer to the start of the
- * structure (alternatively, we could use the
- * dsa_cmnd field, an anachronism from when we weren't
- * sure what the relationship between the NCR structures
- * and host structures were going to be.
- */
- (struct NCR53c7x0_cmd *) ((char *) bus_to_virt (le32_to_cpu(issue[1])) -
- (hostdata->E_dsa_code_begin - hostdata->E_dsa_code_template) -
- offsetof(struct NCR53c7x0_cmd, dsa))
- /* If the IF TRUE bit is not set, it's a NOP */
- : NULL;
-}
-
-
-/*
- * Function : static internal_setup(int board, int chip, char *str, int *ints)
- *
- * Purpose : LILO command line initialization of the overrides array,
- *
- * Inputs : board - currently, unsupported. chip - 700, 70066, 710, 720
- * 810, 815, 820, 825, although currently only the NCR53c810 is
- * supported.
- *
- */
-
-static void
-internal_setup(int board, int chip, char *str, int *ints) {
- unsigned char pci; /* Specifies a PCI override, with bus, device,
- function */
-
- pci = (str && !strcmp (str, "pci")) ? 1 : 0;
-
-/*
- * Override syntaxes are as follows :
- * ncr53c700,ncr53c700-66,ncr53c710,ncr53c720=mem,io,irq,dma
- * ncr53c810,ncr53c820,ncr53c825=mem,io,irq or pci,bus,device,function
- */
-
- if (commandline_current < OVERRIDE_LIMIT) {
- overrides[commandline_current].pci = pci ? 1 : 0;
- if (!pci) {
- overrides[commandline_current].data.normal.base = ints[1];
- overrides[commandline_current].data.normal.io_port = ints[2];
- overrides[commandline_current].data.normal.irq = ints[3];
- overrides[commandline_current].data.normal.dma = (ints[0] >= 4) ?
- ints[4] : DMA_NONE;
- /* FIXME: options is now a long long */
- overrides[commandline_current].options = (ints[0] >= 5) ?
- ints[5] : 0;
- } else {
- overrides[commandline_current].data.pci.bus = ints[1];
- overrides[commandline_current].data.pci.device = ints[2];
- overrides[commandline_current].data.pci.function = ints[3];
- /* FIXME: options is now a long long */
- overrides[commandline_current].options = (ints[0] >= 4) ?
- ints[4] : 0;
- }
- overrides[commandline_current].board = board;
- overrides[commandline_current].chip = chip;
- ++commandline_current;
- ++no_overrides;
- } else {
- printk ("53c7,7x0.c:internal_setup() : too many overrides\n");
- }
-}
-
-/*
- * XXX - we might want to implement a single override function
- * with a chip type field, revamp the command line configuration,
- * etc.
- */
-
-#define setup_wrapper(x) \
-void ncr53c##x##_setup (char *str, int *ints) { \
- internal_setup (BOARD_GENERIC, x, str, ints); \
-}
-
-setup_wrapper(700)
-setup_wrapper(70066)
-setup_wrapper(710)
-setup_wrapper(720)
-setup_wrapper(810)
-setup_wrapper(815)
-setup_wrapper(820)
-setup_wrapper(825)
-
-/*
- * FIXME: we should junk these, in favor of synchronous_want and
- * wide_want in the NCR53c7x0_hostdata structure.
- */
-
-/* Template for "preferred" synchronous transfer parameters. */
-
-static const unsigned char sdtr_message[] = {
-#ifdef CONFIG_SCSI_NCR53C7xx_FAST
- EXTENDED_MESSAGE, 3 /* length */, EXTENDED_SDTR, 25 /* *4ns */, 8 /* off */
-#else
- EXTENDED_MESSAGE, 3 /* length */, EXTENDED_SDTR, 50 /* *4ns */, 8 /* off */
-#endif
-};
-
-/* Template to request asynchronous transfers */
-
-static const unsigned char async_message[] = {
- EXTENDED_MESSAGE, 3 /* length */, EXTENDED_SDTR, 0, 0 /* asynchronous */
-};
-
-/* Template for "preferred" WIDE transfer parameters */
-
-static const unsigned char wdtr_message[] = {
- EXTENDED_MESSAGE, 2 /* length */, EXTENDED_WDTR, 1 /* 2^1 bytes */
-};
-
-/*
- * Function : struct Scsi_Host *find_host (int host)
- *
- * Purpose : KGDB support function which translates a host number
- * to a host structure.
- *
- * Inputs : host - number of SCSI host
- *
- * Returns : NULL on failure, pointer to host structure on success.
- */
-
-#if 0
-static struct Scsi_Host *
-find_host (int host) {
- struct Scsi_Host *h;
- for (h = first_host; h && h->host_no != host; h = h->next);
- if (!h) {
- printk (KERN_ALERT "scsi%d not found\n", host);
- return NULL;
- } else if (h->hostt != the_template) {
- printk (KERN_ALERT "scsi%d is not a NCR board\n", host);
- return NULL;
- }
- return h;
-}
-
-/*
- * Function : request_synchronous (int host, int target)
- *
- * Purpose : KGDB interface which will allow us to negotiate for
- * synchronous transfers. This ill be replaced with a more
- * integrated function; perhaps a new entry in the scsi_host
- * structure, accessible via an ioctl() or perhaps /proc/scsi.
- *
- * Inputs : host - number of SCSI host; target - number of target.
- *
- * Returns : 0 when negotiation has been setup for next SCSI command,
- * -1 on failure.
- */
-
-static int
-request_synchronous (int host, int target) {
- struct Scsi_Host *h;
- struct NCR53c7x0_hostdata *hostdata;
- unsigned long flags;
- if (target < 0) {
- printk (KERN_ALERT "target %d is bogus\n", target);
- return -1;
- }
- if (!(h = find_host (host)))
- return -1;
- else if (h->this_id == target) {
- printk (KERN_ALERT "target %d is host ID\n", target);
- return -1;
- }
- else if (target > h->max_id) {
- printk (KERN_ALERT "target %d exceeds maximum of %d\n", target,
- h->max_id);
- return -1;
- }
- hostdata = (struct NCR53c7x0_hostdata *)h->hostdata;
-
- save_flags(flags);
- cli();
- if (hostdata->initiate_sdtr & (1 << target)) {
- restore_flags(flags);
- printk (KERN_ALERT "target %d already doing SDTR\n", target);
- return -1;
- }
- hostdata->initiate_sdtr |= (1 << target);
- restore_flags(flags);
- return 0;
-}
-
-/*
- * Function : request_disconnect (int host, int on_or_off)
- *
- * Purpose : KGDB support function, tells us to allow or disallow
- * disconnections.
- *
- * Inputs : host - number of SCSI host; on_or_off - non-zero to allow,
- * zero to disallow.
- *
- * Returns : 0 on success, * -1 on failure.
- */
-
-static int
-request_disconnect (int host, int on_or_off) {
- struct Scsi_Host *h;
- struct NCR53c7x0_hostdata *hostdata;
- if (!(h = find_host (host)))
- return -1;
- hostdata = (struct NCR53c7x0_hostdata *) h->hostdata;
- if (on_or_off)
- hostdata->options |= OPTION_DISCONNECT;
- else
- hostdata->options &= ~OPTION_DISCONNECT;
- return 0;
-}
-#endif
-
-/*
- * Function : static void NCR53c7x0_driver_init (struct Scsi_Host *host)
- *
- * Purpose : Initialize internal structures, as required on startup, or
- * after a SCSI bus reset.
- *
- * Inputs : host - pointer to this host adapter's structure
- */
-
-static void
-NCR53c7x0_driver_init (struct Scsi_Host *host) {
- struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
- host->hostdata;
- int i, j;
- u32 *curr;
- for (i = 0; i < 16; ++i) {
- hostdata->request_sense[i] = 0;
- for (j = 0; j < 8; ++j)
- hostdata->busy[i][j] = 0;
- set_synchronous (host, i, /* sxfer */ 0, hostdata->saved_scntl3, 0);
- }
- hostdata->issue_queue = NULL;
- hostdata->running_list = hostdata->finished_queue =
- hostdata->curr = NULL;
- for (i = 0, curr = (u32 *) hostdata->schedule;
- i < host->can_queue; ++i, curr += 2) {
- curr[0] = hostdata->NOP_insn;
- curr[1] = le32_to_cpu(0xdeadbeef);
- }
- curr[0] = le32_to_cpu(((DCMD_TYPE_TCI|DCMD_TCI_OP_JUMP) << 24) | DBC_TCI_TRUE);
- curr[1] = (u32) le32_to_cpu(virt_to_bus (hostdata->script) +
- hostdata->E_wait_reselect);
- hostdata->reconnect_dsa_head = 0;
- hostdata->addr_reconnect_dsa_head = (u32)
- le32_to_cpu(virt_to_bus((void *) &(hostdata->reconnect_dsa_head)));
- hostdata->expecting_iid = 0;
- hostdata->expecting_sto = 0;
- if (hostdata->options & OPTION_ALWAYS_SYNCHRONOUS)
- hostdata->initiate_sdtr = le32_to_cpu(0xffff);
- else
- hostdata->initiate_sdtr = 0;
- hostdata->talked_to = 0;
- hostdata->idle = 1;
-}
-
-/*
- * Function : static int ccf_to_clock (int ccf)
- *
- * Purpose : Return the largest SCSI clock allowable for a given
- * clock conversion factor, allowing us to do synchronous periods
- * when we don't know what the SCSI clock is by taking at least
- * as long as the device says we can.
- *
- * Inputs : ccf
- *
- * Returns : clock on success, -1 on failure.
- */
-
-static int
-ccf_to_clock (int ccf) {
- switch (ccf) {
- case 1: return 25000000; /* Divide by 1.0 */
- case 2: return 37500000; /* Divide by 1.5 */
- case 3: return 50000000; /* Divide by 2.0 */
- case 0: /* Divide by 3.0 */
- case 4: return 66000000;
- default: return -1;
- }
-}
-
-/*
- * Function : static int clock_to_ccf (int clock)
- *
- * Purpose : Return the clock conversion factor for a given SCSI clock.
- *
- * Inputs : clock - SCSI clock expressed in Hz.
- *
- * Returns : ccf on success, -1 on failure.
- */
-
-static int
-clock_to_ccf (int clock) {
- if (clock < 16666666)
- return -1;
- if (clock < 25000000)
- return 1; /* Divide by 1.0 */
- else if (clock < 37500000)
- return 2; /* Divide by 1.5 */
- else if (clock < 50000000)
- return 3; /* Divide by 2.0 */
- else if (clock < 66000000)
- return 4; /* Divide by 3.0 */
- else
- return -1;
-}
-
-/*
- * Function : static int NCR53c7x0_init (struct Scsi_Host *host)
- *
- * Purpose : initialize the internal structures for a given SCSI host
- *
- * Inputs : host - pointer to this host adapter's structure
- *
- * Preconditions : when this function is called, the chip_type
- * field of the hostdata structure MUST have been set.
- *
- * Returns : 0 on success, -1 on failure.
- */
-
-static int
-NCR53c7x0_init (struct Scsi_Host *host) {
- NCR53c7x0_local_declare();
- int i, ccf, expected_ccf;
- struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
- host->hostdata;
- struct Scsi_Host *search;
- /*
- * There are some things which we need to know about in order to provide
- * a semblance of support. Print 'em if they aren't what we expect,
- * otherwise don't add to the noise.
- *
- * -1 means we don't know what to expect.
- */
- int expected_id = -1;
- int expected_clock = -1;
- int uninitialized = 0;
- /*
- * FIXME : this is only on Intel boxes. On other platforms, this
- * will differ.
- */
- int expected_mapping = OPTION_IO_MAPPED;
-
- NCR53c7x0_local_setup(host);
-
- switch (hostdata->chip) {
- case 820:
- case 825:
-#ifdef notyet
- host->max_id = 15;
-#endif
- /* Fall through */
- case 810:
- case 815:
- hostdata->dstat_sir_intr = NCR53c8x0_dstat_sir_intr;
- hostdata->init_save_regs = NULL;
- hostdata->dsa_fixup = NCR53c8xx_dsa_fixup;
- hostdata->init_fixup = NCR53c8x0_init_fixup;
- hostdata->soft_reset = NCR53c8x0_soft_reset;
- hostdata->run_tests = NCR53c8xx_run_tests;
-/* Is the SCSI clock ever anything else on these chips? */
- expected_clock = hostdata->scsi_clock = 40000000;
- expected_id = 7;
- break;
- default:
- printk ("scsi%d : chip type of %d is not supported yet, detaching.\n",
- host->host_no, hostdata->chip);
- scsi_unregister (host);
- return -1;
- }
-
- /* Assign constants accessed by NCR */
- hostdata->NCR53c7xx_zero = 0;
- hostdata->NCR53c7xx_msg_reject = le32_to_cpu(MESSAGE_REJECT);
- hostdata->NCR53c7xx_msg_abort = le32_to_cpu(ABORT);
- hostdata->NCR53c7xx_msg_nop = le32_to_cpu(NOP);
- hostdata->NOP_insn = le32_to_cpu((DCMD_TYPE_TCI|DCMD_TCI_OP_JUMP) << 24);
-
- if (expected_mapping == -1 ||
- (hostdata->options & (OPTION_MEMORY_MAPPED)) !=
- (expected_mapping & OPTION_MEMORY_MAPPED))
- printk ("scsi%d : using %s mapped access\n", host->host_no,
- (hostdata->options & OPTION_MEMORY_MAPPED) ? "memory" :
- "io");
-
- hostdata->dmode = (hostdata->chip == 700 || hostdata->chip == 70066) ?
- DMODE_REG_00 : DMODE_REG_10;
- hostdata->istat = ((hostdata->chip / 100) == 8) ?
- ISTAT_REG_800 : ISTAT_REG_700;
-
-/* Only the ISTAT register is readable when the NCR is running, so make
- sure it's halted. */
- ncr_halt(host);
-
-/*
- * XXX - the NCR53c700 uses bitfielded registers for SCID, SDID, etc,
- * as does the 710 with one bit per SCSI ID. Conversely, the NCR
- * uses a normal, 3 bit binary representation of these values.
- *
- * Get the rest of the NCR documentation, and FIND OUT where the change
- * was.
- */
-#if 0
- tmp = hostdata->this_id_mask = NCR53c7x0_read8(SCID_REG);
- for (host->this_id = 0; tmp != 1; tmp >>=1, ++host->this_id);
-#else
- host->this_id = NCR53c7x0_read8(SCID_REG) & 15;
- if (host->this_id == 0)
- host->this_id = 7; /* sanitize hostid---0 doesn't make sense */
- hostdata->this_id_mask = 1 << host->this_id;
-#endif
-
-/*
- * Note : we should never encounter a board setup for ID0. So,
- * if we see ID0, assume that it was uninitialized and set it
- * to the industry standard 7.
- */
- if (!host->this_id) {
- printk("scsi%d : initiator ID was %d, changing to 7\n",
- host->host_no, host->this_id);
- host->this_id = 7;
- hostdata->this_id_mask = 1 << 7;
- uninitialized = 1;
- };
-
- if (expected_id == -1 || host->this_id != expected_id)
- printk("scsi%d : using initiator ID %d\n", host->host_no,
- host->this_id);
-
- /*
- * Save important registers to allow a soft reset.
- */
-
- if ((hostdata->chip / 100) == 8) {
- /*
- * CTEST4 controls burst mode disable.
- */
- hostdata->saved_ctest4 = NCR53c7x0_read8(CTEST4_REG_800) &
- CTEST4_800_SAVE;
- } else {
- /*
- * CTEST7 controls cache snooping, burst mode, and support for
- * external differential drivers.
- */
- hostdata->saved_ctest7 = NCR53c7x0_read8(CTEST7_REG) & CTEST7_SAVE;
- }
-
- /*
- * On NCR53c700 series chips, DCNTL controls the SCSI clock divisor,
- * on 800 series chips, it allows for a totem-pole IRQ driver.
- */
-
- hostdata->saved_dcntl = NCR53c7x0_read8(DCNTL_REG);
-
- /*
- * DCNTL_800_IRQM controls weather we are using an open drain
- * driver (reset) or totem pole driver (set). In all cases,
- * it's level active. I suppose this is an issue when we're trying to
- * wire-or the same PCI INTx line?
- */
- if ((hostdata->chip / 100) == 8)
- hostdata->saved_dcntl &= ~DCNTL_800_IRQM;
-
- /*
- * DMODE controls DMA burst length, and on 700 series chips,
- * 286 mode and bus width
- */
- hostdata->saved_dmode = NCR53c7x0_read8(hostdata->dmode);
-
- /*
- * Now that burst length and enabled/disabled status is known,
- * clue the user in on it.
- */
-
- if ((hostdata->chip / 100) == 8) {
- if (hostdata->saved_ctest4 & CTEST4_800_BDIS) {
- printk ("scsi%d : burst mode disabled\n", host->host_no);
- } else {
- switch (hostdata->saved_dmode & DMODE_BL_MASK) {
- case DMODE_BL_2: i = 2; break;
- case DMODE_BL_4: i = 4; break;
- case DMODE_BL_8: i = 8; break;
- case DMODE_BL_16: i = 16; break;
- default: i = 0;
- }
- printk ("scsi%d : burst length %d\n", host->host_no, i);
- }
- }
-
- /*
- * On NCR53c810 and NCR53c820 chips, SCNTL3 contails the synchronous
- * and normal clock conversion factors.
- */
- if (hostdata->chip / 100 == 8) {
- expected_ccf = clock_to_ccf (expected_clock);
- hostdata->saved_scntl3 = NCR53c7x0_read8(SCNTL3_REG_800);
- ccf = hostdata->saved_scntl3 & SCNTL3_800_CCF_MASK;
- if (expected_ccf != -1 && ccf != expected_ccf && !ccf) {
- hostdata->saved_scntl3 = (hostdata->saved_scntl3 &
- ~SCNTL3_800_CCF_MASK) | expected_ccf;
- if (!uninitialized) {
- printk ("scsi%d : reset ccf to %d from %d\n",
- host->host_no, expected_ccf, ccf);
- uninitialized = 1;
- }
- }
- } else
- ccf = 0;
-
- /*
- * If we don't have a SCSI clock programmed, pick one on the upper
- * bound of that allowed by NCR so that our transfers err on the
- * slow side, since transfer period must be >= the agreed
- * upon period.
- */
-
- if ((!hostdata->scsi_clock) && (hostdata->scsi_clock = ccf_to_clock (ccf))
- == -1) {
- printk ("scsi%d : clock conversion factor %d unknown.\n"
- " synchronous transfers disabled\n",
- host->host_no, ccf);
- hostdata->options &= ~OPTION_SYNCHRONOUS;
- hostdata->scsi_clock = 0;
- }
-
- if (expected_clock == -1 || hostdata->scsi_clock != expected_clock)
- printk ("scsi%d : using %dMHz SCSI clock\n", host->host_no,
- hostdata->scsi_clock / 1000000);
-
- for (i = 0; i < 16; ++i)
- hostdata->cmd_allocated[i] = 0;
-
- if (hostdata->init_save_regs)
- hostdata->init_save_regs (host);
- if (hostdata->init_fixup)
- hostdata->init_fixup (host);
-
- if (!the_template) {
- the_template = host->hostt;
- first_host = host;
- }
-
- /*
- * Linux SCSI drivers have always been plagued with initialization
- * problems - some didn't work with the BIOS disabled since they expected
- * initialization from it, some didn't work when the networking code
- * was enabled and registers got scrambled, etc.
- *
- * To avoid problems like this, in the future, we will do a soft
- * reset on the SCSI chip, taking it back to a sane state.
- */
-
- hostdata->soft_reset (host);
-
-#if 1
- hostdata->debug_count_limit = -1;
-#else
- hostdata->debug_count_limit = 1;
-#endif
- hostdata->intrs = -1;
- hostdata->resets = -1;
- memcpy ((void *) hostdata->synchronous_want, (void *) sdtr_message,
- sizeof (hostdata->synchronous_want));
-
- NCR53c7x0_driver_init (host);
-
- /*
- * Set up an interrupt handler if we aren't already sharing an IRQ
- * with another board.
- */
-
- for (search = first_host; search && !(search->hostt == the_template &&
- search->irq == host->irq && search != host); search=search->next);
-
- if (!search) {
-#ifdef __powerpc__
- if (request_irq(host->irq, do_NCR53c7x0_intr, SA_SHIRQ, "53c7,8xx", host))
-#else
- if (request_irq(host->irq, do_NCR53c7x0_intr, SA_INTERRUPT, "53c7,8xx", host))
-#endif
- {
-
-
- printk("scsi%d : IRQ%d not free, detaching\n"
- " You have either a configuration problem, or a\n"
- " broken BIOS. You may wish to manually assign\n"
- " an interrupt to the NCR board rather than using\n"
- " an automatic setting.\n",
- host->host_no, host->irq);
- scsi_unregister (host);
- return -1;
- }
- } else {
- printk("scsi%d : using interrupt handler previously installed for scsi%d\n",
- host->host_no, search->host_no);
- }
-
-
- if ((hostdata->run_tests && hostdata->run_tests(host) == -1) ||
- (hostdata->options & OPTION_DEBUG_TESTS_ONLY)) {
- /* XXX Should disable interrupts, etc. here */
- scsi_unregister (host);
- return -1;
- } else {
- if (host->io_port) {
- host->n_io_port = 128;
- request_region (host->io_port, host->n_io_port, "ncr53c7,8xx");
- }
- }
-
- if (NCR53c7x0_read8 (SBCL_REG) & SBCL_BSY) {
- printk ("scsi%d : bus wedge, doing SCSI reset\n", host->host_no);
- hard_reset (host);
- }
- return 0;
-}
-
-/*
- * Function : static int normal_init(Scsi_Host_Template *tpnt, int board,
- * int chip, u32 base, int io_port, int irq, int dma, int pcivalid,
- * struct pci_dev *pci_dev, long long options);
- *
- * Purpose : initializes a NCR53c7,8x0 based on base addresses,
- * IRQ, and DMA channel.
- *
- * Useful where a new NCR chip is backwards compatible with
- * a supported chip, but the DEVICE ID has changed so it
- * doesn't show up when the autoprobe does a pci_find_device.
- *
- * Inputs : tpnt - Template for this SCSI adapter, board - board level
- * product, chip - 810, 820, or 825, bus - PCI bus, device_fn -
- * device and function encoding as used by PCI BIOS calls.
- *
- * Returns : 0 on success, -1 on failure.
- *
- */
-
-static int __init
-normal_init (Scsi_Host_Template *tpnt, int board, int chip,
- u32 base, int io_port, int irq, int dma, int pci_valid,
- struct pci_dev *pci_dev, long long options)
-{
- struct Scsi_Host *instance;
- struct NCR53c7x0_hostdata *hostdata;
- char chip_str[80];
- int script_len = 0, dsa_len = 0, size = 0, max_cmd_size = 0,
- schedule_size = 0, ok = 0;
- void *tmp;
-
- options |= perm_options;
-
- switch (chip) {
- case 825:
- case 820:
- case 815:
- case 810:
- schedule_size = (tpnt->can_queue + 1) * 8 /* JUMP instruction size */;
- script_len = NCR53c8xx_script_len;
- dsa_len = NCR53c8xx_dsa_len;
- options |= OPTION_INTFLY;
- sprintf (chip_str, "NCR53c%d", chip);
- break;
- default:
- printk("scsi-ncr53c7,8xx : unsupported SCSI chip %d\n", chip);
- return -1;
- }
-
- printk("scsi-ncr53c7,8xx : %s at memory 0x%x, io 0x%x, irq %d",
- chip_str, (unsigned) base, io_port, irq);
- if (dma == DMA_NONE)
- printk("\n");
- else
- printk(", dma %d\n", dma);
-
- if ((chip / 100 == 8) && !pci_valid)
- printk ("scsi-ncr53c7,8xx : for better reliability and performance, please use the\n"
- " PCI override instead.\n"
- " Syntax : ncr53c8{10,15,20,25}=pci,<bus>,<device>,<function>\n"
- " <bus> and <device> are usually 0.\n");
-
- if (options & OPTION_DEBUG_PROBE_ONLY) {
- printk ("scsi-ncr53c7,8xx : probe only enabled, aborting initialization\n");
- return -1;
- }
-
- max_cmd_size = sizeof(struct NCR53c7x0_cmd) + dsa_len +
- /* Size of dynamic part of command structure : */
- 2 * /* Worst case : we don't know if we need DATA IN or DATA out */
- ( 2 * /* Current instructions per scatter/gather segment */
- tpnt->sg_tablesize +
- 3 /* Current startup / termination required per phase */
- ) *
- 8 /* Each instruction is eight bytes */;
-
- /* Allocate fixed part of hostdata, dynamic part to hold appropriate
- SCSI SCRIPT(tm) plus a single, maximum-sized NCR53c7x0_cmd structure.
-
- We need a NCR53c7x0_cmd structure for scan_scsis() when we are
- not loaded as a module, and when we're loaded as a module, we
- can't use a non-dynamically allocated structure because modules
- are vmalloc()'d, which can allow structures to cross page
- boundaries and breaks our physical/virtual address assumptions
- for DMA.
-
- So, we stick it past the end of our hostdata structure.
-
- ASSUMPTION :
- Regardless of how many simultaneous SCSI commands we allow,
- the probe code only executes a _single_ instruction at a time,
- so we only need one here, and don't need to allocate NCR53c7x0_cmd
- structures for each target until we are no longer in scan_scsis
- and kmalloc() has become functional (memory_init() happens
- after all device driver initialization).
- */
-
- size = sizeof(struct NCR53c7x0_hostdata) + script_len +
- /* Note that alignment will be guaranteed, since we put the command
- allocated at probe time after the fixed-up SCSI script, which
- consists of 32 bit words, aligned on a 32 bit boundary. But
- on a 64bit machine we need 8 byte alignment for hostdata->free, so
- we add in another 4 bytes to take care of potential misalignment
- */
- (sizeof(void *) - sizeof(u32)) + max_cmd_size + schedule_size;
-
- instance = scsi_register (tpnt, size);
- if (!instance)
- return -1;
-
- /* FIXME : if we ever support an ISA NCR53c7xx based board, we
- need to check if the chip is running in a 16 bit mode, and if so
- unregister it if it is past the 16M (0x1000000) mark */
-
- hostdata = (struct NCR53c7x0_hostdata *)
- instance->hostdata;
- hostdata->size = size;
- hostdata->script_count = script_len / sizeof(u32);
- hostdata = (struct NCR53c7x0_hostdata *) instance->hostdata;
- hostdata->board = board;
- hostdata->chip = chip;
- if ((hostdata->pci_valid = pci_valid)) {
- hostdata->pci_dev = pci_dev;
- }
-
- /*
- * Being memory mapped is more desirable, since
- *
- * - Memory accesses may be faster.
- *
- * - The destination and source address spaces are the same for
- * all instructions, meaning we don't have to twiddle dmode or
- * any other registers.
- *
- * So, we try for memory mapped, and if we don't get it,
- * we go for port mapped, and that failing we tell the user
- * it can't work.
- */
-
- if (base) {
- instance->base = (unsigned long) base;
- /* Check for forced I/O mapping */
- if (!(options & OPTION_IO_MAPPED)) {
- options |= OPTION_MEMORY_MAPPED;
- ok = 1;
- }
- } else {
- options &= ~OPTION_MEMORY_MAPPED;
- }
-
- if (io_port) {
- instance->io_port = io_port;
- options |= OPTION_IO_MAPPED;
- ok = 1;
- } else {
- options &= ~OPTION_IO_MAPPED;
- }
-
- if (!ok) {
- printk ("scsi%d : not initializing, no I/O or memory mapping known \n",
- instance->host_no);
- scsi_unregister (instance);
- return -1;
- }
- instance->irq = irq;
- instance->dma_channel = dma;
- scsi_set_pci_device(instance, pci_dev);
-
- hostdata->options = options;
- hostdata->dsa_len = dsa_len;
- hostdata->max_cmd_size = max_cmd_size;
- hostdata->num_cmds = 1;
- /* Initialize single command */
- tmp = (hostdata->script + hostdata->script_count);
- hostdata->free = ROUNDUP(tmp, void *);
- hostdata->free->real = tmp;
- hostdata->free->size = max_cmd_size;
- hostdata->free->free = NULL;
- hostdata->free->next = NULL;
- hostdata->extra_allocate = 0;
-
- /* Allocate command start code space */
- hostdata->schedule = (chip == 700 || chip == 70066) ?
- NULL : (u32 *) ((char *)hostdata->free + max_cmd_size);
-
-/*
- * For diagnostic purposes, we don't really care how fast things blaze.
- * For profiling, we want to access the 800ns resolution system clock,
- * using a 'C' call on the host processor.
- *
- * Therefore, there's no need for the NCR chip to directly manipulate
- * this data, and we should put it wherever is most convenient for
- * Linux.
- */
- if (track_events)
- hostdata->events = (struct NCR53c7x0_event *) (track_events ?
- vmalloc (sizeof (struct NCR53c7x0_event) * track_events) : NULL);
- else
- hostdata->events = NULL;
-
- if (hostdata->events) {
- memset ((void *) hostdata->events, 0, sizeof(struct NCR53c7x0_event) *
- track_events);
- hostdata->event_size = track_events;
- hostdata->event_index = 0;
- } else
- hostdata->event_size = 0;
-
- return NCR53c7x0_init(instance);
-}
-
-
-/*
- * Function : static int ncr_pci_init(Scsi_Host_Template *tpnt, int board,
- * int chip, int bus, int device_fn, long long options)
- *
- * Purpose : initializes a NCR53c800 family based on the PCI
- * bus, device, and function location of it. Allows
- * reprogramming of latency timer and determining addresses
- * and whether bus mastering, etc. are OK.
- *
- * Useful where a new NCR chip is backwards compatible with
- * a supported chip, but the DEVICE ID has changed so it
- * doesn't show up when the autoprobe does a pci_find_device.
- *
- * Inputs : tpnt - Template for this SCSI adapter, board - board level
- * product, chip - 810, 820, or 825, bus - PCI bus, device_fn -
- * device and function encoding as used by PCI BIOS calls.
- *
- * Returns : 0 on success, -1 on failure.
- *
- */
-
-static int __init
-ncr_pci_init (Scsi_Host_Template *tpnt, int board, int chip,
- unsigned char bus, unsigned char device_fn, long long options){
- unsigned short command;
- unsigned int base, io_port;
- unsigned char revision;
- int error, expected_chip;
- int expected_id = -1, max_revision = -1, min_revision = -1;
- int i, irq;
- struct pci_dev *pdev = pci_find_slot(bus, device_fn);
-
- printk("scsi-ncr53c7,8xx : at PCI bus %d, device %d, function %d\n",
- bus, (int) (device_fn & 0xf8) >> 3,
- (int) device_fn & 7);
-
- if (!pdev) {
- printk("scsi-ncr53c7,8xx : not initializing -- PCI device not found,\n"
- " try using memory, port, irq override instead.\n");
- return -1;
- }
-
- if ((error = pci_read_config_word (pdev, PCI_COMMAND, &command)) ||
- (error = pci_read_config_byte (pdev, PCI_CLASS_REVISION, &revision))) {
- printk ("scsi-ncr53c7,8xx : error %d not initializing due to error reading configuration space\n"
- " perhaps you specified an incorrect PCI bus, device, or function.\n", error);
- return -1;
- }
- if (pci_enable_device(pdev))
- return -1;
- io_port = pci_resource_start(pdev, 0);
- base = pci_resource_start(pdev, 1);
- irq = pdev->irq;
-
- /* If any one ever clones the NCR chips, this will have to change */
-
- if (pdev->vendor != PCI_VENDOR_ID_NCR) {
- printk ("scsi-ncr53c7,8xx : not initializing, 0x%04x is not NCR vendor ID\n",
- (int) pdev->vendor);
- return -1;
- }
-
- if ( ! (command & PCI_COMMAND_MASTER)) {
- printk(KERN_INFO "SCSI: PCI Master Bit has not been set. Setting...\n");
- command |= PCI_COMMAND_MASTER|PCI_COMMAND_IO;
- pci_write_config_word(pdev, PCI_COMMAND, command);
- }
-
-#ifdef __powerpc__
- if (io_port >= 0x10000000 && is_prep ) {
- /* Mapping on PowerPC can't handle this! */
- unsigned long new_io_port;
- new_io_port = (io_port & 0x00FFFFFF) | 0x01000000;
- printk("SCSI: I/O moved from %08X to %08x\n", io_port, new_io_port);
- io_port = new_io_port;
- pci_write_config_dword(pdev, PCI_BASE_ADDRESS_0, io_port);
- pdev->base_address[0] = io_port;
- }
-#endif
-
- /*
- * Bit 0 is the address space indicator and must be one for I/O
- * space mappings, bit 1 is reserved, discard them after checking
- * that they have the correct value of 1.
- */
-
- if (command & PCI_COMMAND_IO) {
- if (!(pdev->resource[0].flags & IORESOURCE_IO)) {
- printk ("scsi-ncr53c7,8xx : disabling I/O mapping since base "
- "address 0\n contains a non-IO mapping\n");
- io_port = 0;
- }
- } else {
- io_port = 0;
- }
-
- if (command & PCI_COMMAND_MEMORY) {
- if (!(pdev->resource[1].flags & IORESOURCE_MEM)) {
- printk("scsi-ncr53c7,8xx : disabling memory mapping since base "
- "address 1\n contains a non-memory mapping\n");
- base = 0;
- }
- } else {
- base = 0;
- }
-
- if (!io_port && !base) {
- printk ("scsi-ncr53c7,8xx : not initializing, both I/O and memory mappings disabled\n");
- return -1;
- }
-
- if (!(command & PCI_COMMAND_MASTER)) {
- printk ("scsi-ncr53c7,8xx : not initializing, BUS MASTERING was disabled\n");
- return -1;
- }
-
- for (i = 0; i < NPCI_CHIP_IDS; ++i) {
- if (pdev->device == pci_chip_ids[i].pci_device_id) {
- max_revision = pci_chip_ids[i].max_revision;
- min_revision = pci_chip_ids[i].min_revision;
- expected_chip = pci_chip_ids[i].chip;
- }
- if (chip == pci_chip_ids[i].chip)
- expected_id = pci_chip_ids[i].pci_device_id;
- }
-
- if (chip && pdev->device != expected_id)
- printk ("scsi-ncr53c7,8xx : warning : device id of 0x%04x doesn't\n"
- " match expected 0x%04x\n",
- (unsigned int) pdev->device, (unsigned int) expected_id );
-
- if (max_revision != -1 && revision > max_revision)
- printk ("scsi-ncr53c7,8xx : warning : revision of %d is greater than %d.\n",
- (int) revision, max_revision);
- else if (min_revision != -1 && revision < min_revision)
- printk ("scsi-ncr53c7,8xx : warning : revision of %d is less than %d.\n",
- (int) revision, min_revision);
-
- if (io_port && check_region (io_port, 128)) {
- printk ("scsi-ncr53c7,8xx : IO region 0x%x to 0x%x is in use\n",
- (unsigned) io_port, (unsigned) io_port + 127);
- return -1;
- }
-
- return normal_init (tpnt, board, chip, (int) base, io_port,
- (int) irq, DMA_NONE, 1, pdev, options);
-}
-
-
-/*
- * Function : int NCR53c7xx_detect(Scsi_Host_Template *tpnt)
- *
- * Purpose : detects and initializes NCR53c7,8x0 SCSI chips
- * that were autoprobed, overridden on the LILO command line,
- * or specified at compile time.
- *
- * Inputs : tpnt - template for this SCSI adapter
- *
- * Returns : number of host adapters detected
- *
- */
-
-int __init
-NCR53c7xx_detect(Scsi_Host_Template *tpnt){
- int i;
- int current_override;
- int count; /* Number of boards detected */
- struct pci_dev *pdev = NULL;
-
- tpnt->proc_name = "ncr53c7xx";
-
- for (current_override = count = 0; current_override < OVERRIDE_LIMIT;
- ++current_override) {
- if (overrides[current_override].pci ?
- !ncr_pci_init (tpnt, overrides[current_override].board,
- overrides[current_override].chip,
- (unsigned char) overrides[current_override].data.pci.bus,
- (((overrides[current_override].data.pci.device
- << 3) & 0xf8)|(overrides[current_override].data.pci.function &
- 7)), overrides[current_override].options):
- !normal_init (tpnt, overrides[current_override].board,
- overrides[current_override].chip,
- overrides[current_override].data.normal.base,
- overrides[current_override].data.normal.io_port,
- overrides[current_override].data.normal.irq,
- overrides[current_override].data.normal.dma,
- 0 /* PCI data invalid */, 0 /* PCI bus place holder */,
- 0 /* PCI device_function place holder */,
- NULL /* PCI pci_dev place holder */,
- overrides[current_override].options)) {
- ++count;
- }
- }
-
- if (pci_present()) {
- for (i = 0; i < NPCI_CHIP_IDS; ++i)
- while ((pdev = pci_find_device (PCI_VENDOR_ID_NCR,
- pci_chip_ids[i].pci_device_id,
- pdev)))
- if (!ncr_pci_init (tpnt, BOARD_GENERIC, pci_chip_ids[i].chip,
- pdev->bus->number, pdev->devfn, /* no options */ 0))
- ++count;
- }
- return count;
-}
-
-/* NCR53c810 and NCR53c820 script handling code */
-
-#include "53c8xx_d.h"
-#ifdef A_int_debug_sync
-#define DEBUG_SYNC_INTR A_int_debug_sync
-#endif
-static int NCR53c8xx_script_len = sizeof (SCRIPT);
-static int NCR53c8xx_dsa_len = A_dsa_end + Ent_dsa_zero - Ent_dsa_code_template;
-
-/*
- * Function : static void NCR53c8x0_init_fixup (struct Scsi_Host *host)
- *
- * Purpose : copy and fixup the SCSI SCRIPTS(tm) code for this device.
- *
- * Inputs : host - pointer to this host adapter's structure
- *
- */
-
-static void
-NCR53c8x0_init_fixup (struct Scsi_Host *host) {
- NCR53c7x0_local_declare();
- struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
- host->hostdata;
- unsigned char tmp;
- int i, ncr_to_memory, memory_to_ncr;
- u32 base;
-#ifdef __powerpc__
- unsigned long *script_ptr;
-#endif
- NCR53c7x0_local_setup(host);
-
-
- /* XXX - NOTE : this code MUST be made endian aware */
- /* Copy code into buffer that was allocated at detection time. */
- memcpy ((void *) hostdata->script, (void *) SCRIPT,
- sizeof(SCRIPT));
- /* Fixup labels */
- for (i = 0; i < PATCHES; ++i)
- hostdata->script[LABELPATCHES[i]] +=
- virt_to_bus(hostdata->script);
- /* Fixup addresses of constants that used to be EXTERNAL */
-
- patch_abs_32 (hostdata->script, 0, NCR53c7xx_msg_abort,
- virt_to_bus(&(hostdata->NCR53c7xx_msg_abort)));
- patch_abs_32 (hostdata->script, 0, NCR53c7xx_msg_reject,
- virt_to_bus(&(hostdata->NCR53c7xx_msg_reject)));
- patch_abs_32 (hostdata->script, 0, NCR53c7xx_zero,
- virt_to_bus(&(hostdata->NCR53c7xx_zero)));
- patch_abs_32 (hostdata->script, 0, NCR53c7xx_sink,
- virt_to_bus(&(hostdata->NCR53c7xx_sink)));
- patch_abs_32 (hostdata->script, 0, NOP_insn,
- virt_to_bus(&(hostdata->NOP_insn)));
- patch_abs_32 (hostdata->script, 0, schedule,
- virt_to_bus((void *) hostdata->schedule));
-
- /* Fixup references to external variables: */
- for (i = 0; i < EXTERNAL_PATCHES_LEN; ++i)
- hostdata->script[EXTERNAL_PATCHES[i].offset] +=
- virt_to_bus(EXTERNAL_PATCHES[i].address);
-
- /*
- * Fixup absolutes set at boot-time.
- *
- * All non-code absolute variables suffixed with "dsa_" and "int_"
- * are constants, and need no fixup provided the assembler has done
- * it for us (I don't know what the "real" NCR assembler does in
- * this case, my assembler does the right magic).
- */
-
- patch_abs_rwri_data (hostdata->script, 0, dsa_save_data_pointer,
- Ent_dsa_code_save_data_pointer - Ent_dsa_zero);
- patch_abs_rwri_data (hostdata->script, 0, dsa_restore_pointers,
- Ent_dsa_code_restore_pointers - Ent_dsa_zero);
- patch_abs_rwri_data (hostdata->script, 0, dsa_check_reselect,
- Ent_dsa_code_check_reselect - Ent_dsa_zero);
-
- /*
- * Just for the hell of it, preserve the settings of
- * Burst Length and Enable Read Line bits from the DMODE
- * register. Make sure SCRIPTS start automagically.
- */
-
- tmp = NCR53c7x0_read8(DMODE_REG_10);
- tmp &= (DMODE_800_ERL | DMODE_BL_MASK);
-
- if (!(hostdata->options & OPTION_MEMORY_MAPPED)) {
- base = (u32) host->io_port;
- memory_to_ncr = tmp|DMODE_800_DIOM;
- ncr_to_memory = tmp|DMODE_800_SIOM;
- } else {
- base = virt_to_bus((void *)host->base);
- memory_to_ncr = ncr_to_memory = tmp;
- }
-
- patch_abs_32 (hostdata->script, 0, addr_scratch, base + SCRATCHA_REG_800);
- patch_abs_32 (hostdata->script, 0, addr_temp, base + TEMP_REG);
-
- /*
- * I needed some variables in the script to be accessible to
- * both the NCR chip and the host processor. For these variables,
- * I made the arbitrary decision to store them directly in the
- * hostdata structure rather than in the RELATIVE area of the
- * SCRIPTS.
- */
-
-
- patch_abs_rwri_data (hostdata->script, 0, dmode_memory_to_memory, tmp);
- patch_abs_rwri_data (hostdata->script, 0, dmode_memory_to_ncr, memory_to_ncr);
- patch_abs_rwri_data (hostdata->script, 0, dmode_ncr_to_memory, ncr_to_memory);
-
- patch_abs_32 (hostdata->script, 0, msg_buf,
- virt_to_bus((void *)&(hostdata->msg_buf)));
- patch_abs_32 (hostdata->script, 0, reconnect_dsa_head,
- virt_to_bus((void *)&(hostdata->reconnect_dsa_head)));
- patch_abs_32 (hostdata->script, 0, addr_reconnect_dsa_head,
- virt_to_bus((void *)&(hostdata->addr_reconnect_dsa_head)));
- patch_abs_32 (hostdata->script, 0, reselected_identify,
- virt_to_bus((void *)&(hostdata->reselected_identify)));
-/* reselected_tag is currently unused */
-#if 0
- patch_abs_32 (hostdata->script, 0, reselected_tag,
- virt_to_bus((void *)&(hostdata->reselected_tag)));
-#endif
-
- patch_abs_32 (hostdata->script, 0, test_dest,
- virt_to_bus((void*)&hostdata->test_dest));
- patch_abs_32 (hostdata->script, 0, test_src,
- virt_to_bus(&hostdata->test_source));
-
- patch_abs_rwri_data (hostdata->script, 0, dsa_check_reselect,
- (unsigned char)(Ent_dsa_code_check_reselect - Ent_dsa_zero));
-
-/* These are for event logging; the ncr_event enum contains the
- actual interrupt numbers. */
-#ifdef A_int_EVENT_SELECT
- patch_abs_32 (hostdata->script, 0, int_EVENT_SELECT, (u32) EVENT_SELECT);
-#endif
-#ifdef A_int_EVENT_DISCONNECT
- patch_abs_32 (hostdata->script, 0, int_EVENT_DISCONNECT, (u32) EVENT_DISCONNECT);
-#endif
-#ifdef A_int_EVENT_RESELECT
- patch_abs_32 (hostdata->script, 0, int_EVENT_RESELECT, (u32) EVENT_RESELECT);
-#endif
-#ifdef A_int_EVENT_COMPLETE
- patch_abs_32 (hostdata->script, 0, int_EVENT_COMPLETE, (u32) EVENT_COMPLETE);
-#endif
-#ifdef A_int_EVENT_IDLE
- patch_abs_32 (hostdata->script, 0, int_EVENT_IDLE, (u32) EVENT_IDLE);
-#endif
-#ifdef A_int_EVENT_SELECT_FAILED
- patch_abs_32 (hostdata->script, 0, int_EVENT_SELECT_FAILED,
- (u32) EVENT_SELECT_FAILED);
-#endif
-#ifdef A_int_EVENT_BEFORE_SELECT
- patch_abs_32 (hostdata->script, 0, int_EVENT_BEFORE_SELECT,
- (u32) EVENT_BEFORE_SELECT);
-#endif
-#ifdef A_int_EVENT_RESELECT_FAILED
- patch_abs_32 (hostdata->script, 0, int_EVENT_RESELECT_FAILED,
- (u32) EVENT_RESELECT_FAILED);
-#endif
-
- /*
- * Make sure the NCR and Linux code agree on the location of
- * certain fields.
- */
-
- hostdata->E_accept_message = Ent_accept_message;
- hostdata->E_command_complete = Ent_command_complete;
- hostdata->E_cmdout_cmdout = Ent_cmdout_cmdout;
- hostdata->E_data_transfer = Ent_data_transfer;
- hostdata->E_debug_break = Ent_debug_break;
- hostdata->E_dsa_code_template = Ent_dsa_code_template;
- hostdata->E_dsa_code_template_end = Ent_dsa_code_template_end;
- hostdata->E_end_data_transfer = Ent_end_data_transfer;
- hostdata->E_initiator_abort = Ent_initiator_abort;
- hostdata->E_msg_in = Ent_msg_in;
- hostdata->E_other_transfer = Ent_other_transfer;
- hostdata->E_other_in = Ent_other_in;
- hostdata->E_other_out = Ent_other_out;
- hostdata->E_reject_message = Ent_reject_message;
- hostdata->E_respond_message = Ent_respond_message;
- hostdata->E_select = Ent_select;
- hostdata->E_select_msgout = Ent_select_msgout;
- hostdata->E_target_abort = Ent_target_abort;
-#ifdef Ent_test_0
- hostdata->E_test_0 = Ent_test_0;
-#endif
- hostdata->E_test_1 = Ent_test_1;
- hostdata->E_test_2 = Ent_test_2;
-#ifdef Ent_test_3
- hostdata->E_test_3 = Ent_test_3;
-#endif
- hostdata->E_wait_reselect = Ent_wait_reselect;
- hostdata->E_dsa_code_begin = Ent_dsa_code_begin;
-
- hostdata->dsa_cmdout = A_dsa_cmdout;
- hostdata->dsa_cmnd = A_dsa_cmnd;
- hostdata->dsa_datain = A_dsa_datain;
- hostdata->dsa_dataout = A_dsa_dataout;
- hostdata->dsa_end = A_dsa_end;
- hostdata->dsa_msgin = A_dsa_msgin;
- hostdata->dsa_msgout = A_dsa_msgout;
- hostdata->dsa_msgout_other = A_dsa_msgout_other;
- hostdata->dsa_next = A_dsa_next;
- hostdata->dsa_select = A_dsa_select;
- hostdata->dsa_start = Ent_dsa_code_template - Ent_dsa_zero;
- hostdata->dsa_status = A_dsa_status;
- hostdata->dsa_jump_dest = Ent_dsa_code_fix_jump - Ent_dsa_zero +
- 8 /* destination operand */;
-
- /* sanity check */
- if (A_dsa_fields_start != Ent_dsa_code_template_end -
- Ent_dsa_zero)
- printk("scsi%d : NCR dsa_fields start is %d not %d\n",
- host->host_no, A_dsa_fields_start, Ent_dsa_code_template_end -
- Ent_dsa_zero);
-#ifdef __powerpc__
-/* The PowerPC is Big Endian - adjust script appropriately */
- script_ptr = hostdata->script;
- for (i = 0; i < sizeof(SCRIPT); i += sizeof(long))
- {
- *script_ptr++ = le32_to_cpu(*script_ptr);
- }
-#endif
-
- printk("scsi%d : NCR code relocated to 0x%lx (virt 0x%p)\n", host->host_no,
- virt_to_bus(hostdata->script), hostdata->script);
-}
-
-/*
- * Function : static int NCR53c8xx_run_tests (struct Scsi_Host *host)
- *
- * Purpose : run various verification tests on the NCR chip,
- * including interrupt generation, and proper bus mastering
- * operation.
- *
- * Inputs : host - a properly initialized Scsi_Host structure
- *
- * Preconditions : the NCR chip must be in a halted state.
- *
- * Returns : 0 if all tests were successful, -1 on error.
- *
- */
-
-static int
-NCR53c8xx_run_tests (struct Scsi_Host *host) {
- NCR53c7x0_local_declare();
- struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
- host->hostdata;
- unsigned long timeout;
- u32 start;
- int failed, i;
- unsigned long flags;
- NCR53c7x0_local_setup(host);
-
- /* The NCR chip _must_ be idle to run the test scripts */
-
- save_flags(flags);
- cli();
- if (!hostdata->idle) {
- printk ("scsi%d : chip not idle, aborting tests\n", host->host_no);
- restore_flags(flags);
- return -1;
- }
-
- /*
- * Check for functional interrupts, this could work as an
- * autoprobe routine.
- */
-
- if ((hostdata->options & OPTION_DEBUG_TEST1) &&
- hostdata->state != STATE_DISABLED) {
- hostdata->idle = 0;
- hostdata->test_running = 1;
- hostdata->test_completed = -1;
- hostdata->test_dest = 0;
- hostdata->test_source = 0xdeadbeef;
- start = virt_to_bus (hostdata->script) + hostdata->E_test_1;
- hostdata->state = STATE_RUNNING;
- printk ("scsi%d : test 1", host->host_no);
- NCR53c7x0_write32 (DSP_REG, start);
- printk (" started\n");
- restore_flags(flags);
-
- /*
- * This is currently a .5 second timeout, since (in theory) no slow
- * board will take that long. In practice, we've seen one
- * pentium which occasionally fails with this, but works with
- * 10 times as much?
- */
-
- timeout = jiffies + 5 * HZ / 10;
- while ((hostdata->test_completed == -1) && time_before(jiffies, timeout)) {
- barrier();
- cpu_relax();
- }
-
- failed = 1;
- if (hostdata->test_completed == -1)
- printk ("scsi%d : driver test 1 timed out%s\n",host->host_no ,
- (hostdata->test_dest == 0xdeadbeef) ?
- " due to lost interrupt.\n"
- " Please verify that the correct IRQ is being used for your board,\n"
- " and that the motherboard IRQ jumpering matches the PCI setup on\n"
- " PCI systems.\n"
- " If you are using a NCR53c810 board in a PCI system, you should\n"
- " also verify that the board is jumpered to use PCI INTA, since\n"
- " most PCI motherboards lack support for INTB, INTC, and INTD.\n"
- : "");
- else if (hostdata->test_completed != 1)
- printk ("scsi%d : test 1 bad interrupt value (%d)\n",
- host->host_no, hostdata->test_completed);
- else
- failed = (hostdata->test_dest != 0xdeadbeef);
-
- if (hostdata->test_dest != 0xdeadbeef) {
- printk ("scsi%d : driver test 1 read 0x%x instead of 0xdeadbeef indicating a\n"
- " probable cache invalidation problem. Please configure caching\n"
- " as write-through or disabled\n",
- host->host_no, hostdata->test_dest);
- }
-
- if (failed) {
- printk ("scsi%d : DSP = 0x%p (script at 0x%p, start at 0x%x)\n",
- host->host_no, bus_to_virt(NCR53c7x0_read32(DSP_REG)),
- hostdata->script, start);
- printk ("scsi%d : DSPS = 0x%x\n", host->host_no,
- NCR53c7x0_read32(DSPS_REG));
- return -1;
- }
- hostdata->test_running = 0;
- }
-
- if ((hostdata->options & OPTION_DEBUG_TEST2) &&
- hostdata->state != STATE_DISABLED) {
- u32 dsa[48];
- unsigned char identify = IDENTIFY(0, 0);
- unsigned char cmd[6];
- unsigned char data[36];
- unsigned char status = 0xff;
- unsigned char msg = 0xff;
-
- cmd[0] = INQUIRY;
- cmd[1] = cmd[2] = cmd[3] = cmd[5] = 0;
- cmd[4] = sizeof(data);
-
-/* Need to adjust for endian-ness */
- dsa[2] = le32_to_cpu(1);
- dsa[3] = le32_to_cpu(virt_to_bus(&identify));
- dsa[4] = le32_to_cpu(6);
- dsa[5] = le32_to_cpu(virt_to_bus(&cmd));
- dsa[6] = le32_to_cpu(sizeof(data));
- dsa[7] = le32_to_cpu(virt_to_bus(&data));
- dsa[8] = le32_to_cpu(1);
- dsa[9] = le32_to_cpu(virt_to_bus(&status));
- dsa[10] = le32_to_cpu(1);
- dsa[11] = le32_to_cpu(virt_to_bus(&msg));
-
- for (i = 0; i < 3; ++i) {
- cli();
- if (!hostdata->idle) {
- printk ("scsi%d : chip not idle, aborting tests\n", host->host_no);
- restore_flags(flags);
- return -1;
- }
-
- /* SCNTL3 SDID */
- dsa[0] = le32_to_cpu((0x33 << 24) | (i << 16)) ;
- hostdata->idle = 0;
- hostdata->test_running = 2;
- hostdata->test_completed = -1;
- start = virt_to_bus(hostdata->script) + hostdata->E_test_2;
- hostdata->state = STATE_RUNNING;
- NCR53c7x0_write32 (DSA_REG, virt_to_bus(dsa));
- NCR53c7x0_write32 (DSP_REG, start);
- restore_flags(flags);
-
- timeout = jiffies + 5 * HZ; /* arbitrary */
- while ((hostdata->test_completed == -1) && time_before(jiffies, timeout)) {
- barrier();
- cpu_relax();
- }
- NCR53c7x0_write32 (DSA_REG, 0);
-
- if (hostdata->test_completed == 2) {
- data[35] = 0;
- printk ("scsi%d : test 2 INQUIRY to target %d, lun 0 : %s\n",
- host->host_no, i, data + 8);
- printk ("scsi%d : status ", host->host_no);
- print_status (status);
- printk ("\nscsi%d : message ", host->host_no);
- print_msg (&msg);
- printk ("\n");
- } else if (hostdata->test_completed == 3) {
- printk("scsi%d : test 2 no connection with target %d\n",
- host->host_no, i);
- if (!hostdata->idle) {
- printk("scsi%d : not idle\n", host->host_no);
- restore_flags(flags);
- return -1;
- }
- } else if (hostdata->test_completed == -1) {
- printk ("scsi%d : test 2 timed out\n", host->host_no);
- restore_flags(flags);
- return -1;
- }
- hostdata->test_running = 0;
- }
- }
-
- restore_flags(flags);
- return 0;
-}
-
-/*
- * Function : static void NCR53c8xx_dsa_fixup (struct NCR53c7x0_cmd *cmd)
- *
- * Purpose : copy the NCR53c8xx dsa structure into cmd's dsa buffer,
- * performing all necessary relocation.
- *
- * Inputs : cmd, a NCR53c7x0_cmd structure with a dsa area large
- * enough to hold the NCR53c8xx dsa.
- */
-
-static void
-NCR53c8xx_dsa_fixup (struct NCR53c7x0_cmd *cmd) {
- Scsi_Cmnd *c = cmd->cmd;
- struct Scsi_Host *host = c->device->host;
- struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
- host->hostdata;
- int i;
-#ifdef __powerpc__
- int len;
- unsigned long *dsa_ptr;
-#endif
-
- memcpy (cmd->dsa, hostdata->script + (hostdata->E_dsa_code_template / 4),
- hostdata->E_dsa_code_template_end - hostdata->E_dsa_code_template);
-#ifdef __powerpc__
- /* Note: the script has already been 'endianized' */
- dsa_ptr = cmd->dsa;
- len = hostdata->E_dsa_code_template_end - hostdata->E_dsa_code_template;
- for (i = 0; i < len; i += sizeof(long))
- {
- *dsa_ptr++ = le32_to_cpu(*dsa_ptr);
- }
-#endif
-
- /*
- * Note : within the NCR 'C' code, dsa points to the _start_
- * of the DSA structure, and _not_ the offset of dsa_zero within
- * that structure used to facilitate shorter signed offsets
- * for the 8 bit ALU.
- *
- * The implications of this are that
- *
- * - 32 bit A_dsa_* absolute values require an additional
- * dsa_zero added to their value to be correct, since they are
- * relative to dsa_zero which is in essentially a separate
- * space from the code symbols.
- *
- * - All other symbols require no special treatment.
- */
-
- patch_abs_tci_data (cmd->dsa, Ent_dsa_code_template / sizeof(u32),
- dsa_temp_lun, c->device->lun);
- patch_abs_32 (cmd->dsa, Ent_dsa_code_template / sizeof(u32),
- dsa_temp_addr_next, virt_to_bus(&cmd->dsa_next_addr));
- patch_abs_32 (cmd->dsa, Ent_dsa_code_template / sizeof(u32),
- dsa_temp_next, virt_to_bus(cmd->dsa) + Ent_dsa_zero -
- Ent_dsa_code_template + A_dsa_next);
- patch_abs_32 (cmd->dsa, Ent_dsa_code_template / sizeof(u32),
- dsa_temp_sync, virt_to_bus((void *)hostdata->sync[c->device->id].script));
- patch_abs_tci_data (cmd->dsa, Ent_dsa_code_template / sizeof(u32),
- dsa_temp_target, c->device->id);
- /* XXX - new pointer stuff */
- patch_abs_32 (cmd->dsa, Ent_dsa_code_template / sizeof(u32),
- dsa_temp_addr_saved_pointer, virt_to_bus(&cmd->saved_data_pointer));
- patch_abs_32 (cmd->dsa, Ent_dsa_code_template / sizeof(u32),
- dsa_temp_addr_saved_residual, virt_to_bus(&cmd->saved_residual));
- patch_abs_32 (cmd->dsa, Ent_dsa_code_template / sizeof(u32),
- dsa_temp_addr_residual, virt_to_bus(&cmd->residual));
-
- /* XXX - new start stuff */
- patch_abs_32 (cmd->dsa, Ent_dsa_code_template / sizeof(u32),
- dsa_temp_addr_dsa_value, virt_to_bus(&cmd->dsa_addr));
-#ifdef __powerpc__
- dsa_ptr = cmd->dsa;
- len = hostdata->E_dsa_code_template_end - hostdata->E_dsa_code_template;
- for (i = 0; i < len; i += sizeof(long))
- {
- *dsa_ptr++ = le32_to_cpu(*dsa_ptr);
- }
-#endif
-
-}
-
-/*
- * Function : run_process_issue_queue (void)
- *
- * Purpose : insure that the coroutine is running and will process our
- * request. process_issue_queue_running is checked/set here (in an
- * inline function) rather than in process_issue_queue itself to reduce
- * the chances of stack overflow.
- *
- */
-
-static volatile int process_issue_queue_running = 0;
-
-static __inline__ void
-run_process_issue_queue(void) {
- unsigned long flags;
- save_flags (flags);
- cli();
- if (!process_issue_queue_running) {
- process_issue_queue_running = 1;
- process_issue_queue(flags);
- /*
- * process_issue_queue_running is cleared in process_issue_queue
- * once it can't do more work, and process_issue_queue exits with
- * interrupts disabled.
- */
- }
- restore_flags (flags);
-}
-
-/*
- * Function : static void abnormal_finished (struct NCR53c7x0_cmd *cmd, int
- * result)
- *
- * Purpose : mark SCSI command as finished, OR'ing the host portion
- * of the result word into the result field of the corresponding
- * Scsi_Cmnd structure, and removing it from the internal queues.
- *
- * Inputs : cmd - command, result - entire result field
- *
- * Preconditions : the NCR chip should be in a halted state when
- * abnormal_finished is run, since it modifies structures which
- * the NCR expects to have exclusive access to.
- */
-
-static void
-abnormal_finished (struct NCR53c7x0_cmd *cmd, int result) {
- Scsi_Cmnd *c = cmd->cmd;
- struct Scsi_Host *host = c->device->host;
- struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
- host->hostdata;
- unsigned long flags;
- int left, found;
- volatile struct NCR53c7x0_cmd * linux_search;
- volatile struct NCR53c7x0_cmd * volatile *linux_prev;
- volatile u32 *ncr_prev, *curr, ncr_search;
-
-#if 0
- printk ("scsi%d: abnormal finished\n", host->host_no);
-#endif
-
- save_flags(flags);
- cli();
- found = 0;
- /*
- * Traverse the NCR issue array until we find a match or run out
- * of instructions. Instructions in the NCR issue array are
- * either JUMP or NOP instructions, which are 2 words in length.
- */
-
-
- for (found = 0, left = host->can_queue, curr = hostdata->schedule;
- left > 0; --left, curr += 2)
- {
- if (issue_to_cmd (host, hostdata, (u32 *) curr) == cmd)
- {
- curr[0] = hostdata->NOP_insn;
- curr[1] = le32_to_cpu(0xdeadbeef);
- ++found;
- break;
- }
- }
-
- /*
- * Traverse the NCR reconnect list of DSA structures until we find
- * a pointer to this dsa or have found too many command structures.
- * We let prev point at the next field of the previous element or
- * head of the list, so we don't do anything different for removing
- * the head element.
- */
-
- for (left = host->can_queue,
- ncr_search = le32_to_cpu(hostdata->reconnect_dsa_head),
- ncr_prev = &hostdata->reconnect_dsa_head;
- left >= 0 && ncr_search &&
- ((char*)bus_to_virt(ncr_search) + hostdata->dsa_start)
- != (char *) cmd->dsa;
- ncr_prev = (u32*) ((char*)bus_to_virt(ncr_search) +
- hostdata->dsa_next), ncr_search = le32_to_cpu(*ncr_prev), --left);
-
- if (left < 0) {
- printk("scsi%d: loop detected in ncr reconnect list\n",
- host->host_no);
- } else if (ncr_search) {
- if (found)
- printk("scsi%d: scsi %ld in ncr issue array and reconnect lists\n",
- host->host_no, c->pid);
- else {
- volatile u32 * next = (u32 *)
- ((char *)bus_to_virt(ncr_search) + hostdata->dsa_next);
- *ncr_prev = *next;
-/* If we're at the tail end of the issue queue, update that pointer too. */
- found = 1;
- }
- }
-
- /*
- * Traverse the host running list until we find this command or discover
- * we have too many elements, pointing linux_prev at the next field of the
- * linux_previous element or head of the list, search at this element.
- */
-
- for (left = host->can_queue, linux_search = hostdata->running_list,
- linux_prev = &hostdata->running_list;
- left >= 0 && linux_search && linux_search != cmd;
- linux_prev = &(linux_search->next),
- linux_search = linux_search->next, --left);
-
- if (left < 0)
- printk ("scsi%d: loop detected in host running list for scsi pid %ld\n",
- host->host_no, c->pid);
- else if (linux_search) {
- *linux_prev = linux_search->next;
- --hostdata->busy[c->device->id][c->device->lun];
- }
-
- /* Return the NCR command structure to the free list */
- cmd->next = hostdata->free;
- hostdata->free = cmd;
- c->host_scribble = NULL;
-
- /* And return */
- c->result = result;
- c->scsi_done(c);
-
- restore_flags(flags);
- run_process_issue_queue();
-}
-
-/*
- * Function : static void intr_break (struct Scsi_Host *host,
- * struct NCR53c7x0_cmd *cmd)
- *
- * Purpose : Handler for breakpoint interrupts from a SCSI script
- *
- * Inputs : host - pointer to this host adapter's structure,
- * cmd - pointer to the command (if any) dsa was pointing
- * to.
- *
- */
-
-static void
-intr_break (struct Scsi_Host *host, struct
- NCR53c7x0_cmd *cmd) {
- NCR53c7x0_local_declare();
- struct NCR53c7x0_break *bp;
-#if 0
- Scsi_Cmnd *c = cmd ? cmd->cmd : NULL;
-#endif
- u32 *dsp;
- struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
- host->hostdata;
- unsigned long flags;
- NCR53c7x0_local_setup(host);
-
- /*
- * Find the break point corresponding to this address, and
- * dump the appropriate debugging information to standard
- * output.
- */
- save_flags(flags);
- cli();
- dsp = (u32 *) bus_to_virt(NCR53c7x0_read32(DSP_REG));
- for (bp = hostdata->breakpoints; bp && bp->address != dsp;
- bp = bp->next);
- if (!bp)
- panic("scsi%d : break point interrupt from %p with no breakpoint!",
- host->host_no, dsp);
-
- /*
- * Configure the NCR chip for manual start mode, so that we can
- * point the DSP register at the instruction that follows the
- * INT int_debug_break instruction.
- */
-
- NCR53c7x0_write8 (hostdata->dmode,
- NCR53c7x0_read8(hostdata->dmode)|DMODE_MAN);
-
- /*
- * And update the DSP register, using the size of the old
- * instruction in bytes.
- */
-
- restore_flags(flags);
-}
-/*
- * Function : static void print_synchronous (const char *prefix,
- * const unsigned char *msg)
- *
- * Purpose : print a pretty, user and machine parsable representation
- * of a SDTR message, including the "real" parameters, data
- * clock so we can tell transfer rate at a glance.
- *
- * Inputs ; prefix - text to prepend, msg - SDTR message (5 bytes)
- */
-
-static void
-print_synchronous (const char *prefix, const unsigned char *msg) {
- if (msg[4]) {
- int Hz = 1000000000 / (msg[3] * 4);
- int integer = Hz / 1000000;
- int fraction = (Hz - (integer * 1000000)) / 10000;
- printk ("%speriod %dns offset %d %d.%02dMHz %s SCSI%s\n",
- prefix, (int) msg[3] * 4, (int) msg[4], integer, fraction,
- (((msg[3] * 4) < 200) ? "FAST" : "synchronous"),
- (((msg[3] * 4) < 200) ? "-II" : ""));
- } else
- printk ("%sasynchronous SCSI\n", prefix);
-}
-
-/*
- * Function : static void set_synchronous (struct Scsi_Host *host,
- * int target, int sxfer, int scntl3, int now_connected)
- *
- * Purpose : reprogram transfers between the selected SCSI initiator and
- * target with the given register values; in the indirect
- * select operand, reselection script, and chip registers.
- *
- * Inputs : host - NCR53c7,8xx SCSI host, target - number SCSI target id,
- * sxfer and scntl3 - NCR registers. now_connected - if non-zero,
- * we should reprogram the registers now too.
- */
-
-static void
-set_synchronous (struct Scsi_Host *host, int target, int sxfer, int scntl3,
- int now_connected) {
- NCR53c7x0_local_declare();
- struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
- host->hostdata;
- u32 *script;
- NCR53c7x0_local_setup(host);
-
- /* These are eight bit registers */
- sxfer &= 0xff;
- scntl3 &= 0xff;
-
- hostdata->sync[target].sxfer_sanity = sxfer;
- hostdata->sync[target].scntl3_sanity = scntl3;
-
-/*
- * HARD CODED : synchronous script is EIGHT words long. This
- * must agree with 53c7.8xx.h
- */
-
- if ((hostdata->chip != 700) && (hostdata->chip != 70066)) {
- hostdata->sync[target].select_indirect = (scntl3 << 24) |
- (target << 16) | (sxfer << 8);
-
- script = (u32 *) hostdata->sync[target].script;
-
- /* XXX - add NCR53c7x0 code to reprogram SCF bits if we want to */
- if ((hostdata->chip / 100) == 8) {
- script[0] = ((DCMD_TYPE_RWRI | DCMD_RWRI_OPC_MODIFY |
- DCMD_RWRI_OP_MOVE) << 24) |
- (SCNTL3_REG_800 << 16) | (scntl3 << 8);
- script[1] = 0;
- script += 2;
- }
-
- script[0] = ((DCMD_TYPE_RWRI | DCMD_RWRI_OPC_MODIFY |
- DCMD_RWRI_OP_MOVE) << 24) |
- (SXFER_REG << 16) | (sxfer << 8);
- script[1] = 0;
- script += 2;
-
-#ifdef DEBUG_SYNC_INTR
- if (hostdata->options & OPTION_DEBUG_DISCONNECT) {
- script[0] = ((DCMD_TYPE_TCI|DCMD_TCI_OP_INT) << 24) | DBC_TCI_TRUE;
- script[1] = DEBUG_SYNC_INTR;
- script += 2;
- }
-#endif
-
- script[0] = ((DCMD_TYPE_TCI|DCMD_TCI_OP_RETURN) << 24) | DBC_TCI_TRUE;
- script[1] = 0;
- script += 2;
- }
-
- if (hostdata->options & OPTION_DEBUG_SYNCHRONOUS)
- printk ("scsi%d : target %d sync parameters are sxfer=0x%x, scntl3=0x%x\n",
- host->host_no, target, sxfer, scntl3);
-
- if (now_connected) {
- if ((hostdata->chip / 100) == 8)
- NCR53c7x0_write8(SCNTL3_REG_800, scntl3);
- NCR53c7x0_write8(SXFER_REG, sxfer);
- }
-}
-
-
-/*
- * Function : static int asynchronous (struct Scsi_Host *host, int target)
- *
- * Purpose : reprogram between the selected SCSI Host adapter and target
- * (assumed to be currently connected) for asynchronous transfers.
- *
- * Inputs : host - SCSI host structure, target - numeric target ID.
- *
- * Preconditions : the NCR chip should be in one of the halted states
- */
-
-static void
-asynchronous (struct Scsi_Host *host, int target) {
- NCR53c7x0_local_declare();
- struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
- host->hostdata;
- NCR53c7x0_local_setup(host);
- set_synchronous (host, target, /* no offset */ 0, hostdata->saved_scntl3,
- 1);
- printk ("scsi%d : setting target %d to asynchronous SCSI\n",
- host->host_no, target);
-}
-
-/*
- * XXX - do we want to go out of our way (ie, add extra code to selection
- * in the NCR53c710/NCR53c720 script) to reprogram the synchronous
- * conversion bits, or can we be content in just setting the
- * sxfer bits?
- */
-
-/* Table for NCR53c8xx synchronous values */
-static const struct {
- int div; /* Total clock divisor * 10 */
- unsigned char scf; /* */
- unsigned char tp; /* 4 + tp = xferp divisor */
-} syncs[] = {
-/* div scf tp div scf tp div scf tp */
- { 40, 1, 0}, { 50, 1, 1}, { 60, 1, 2},
- { 70, 1, 3}, { 75, 2, 1}, { 80, 1, 4},
- { 90, 1, 5}, { 100, 1, 6}, { 105, 2, 3},
- { 110, 1, 7}, { 120, 2, 4}, { 135, 2, 5},
- { 140, 3, 3}, { 150, 2, 6}, { 160, 3, 4},
- { 165, 2, 7}, { 180, 3, 5}, { 200, 3, 6},
- { 210, 4, 3}, { 220, 3, 7}, { 240, 4, 4},
- { 270, 4, 5}, { 300, 4, 6}, { 330, 4, 7}
-};
-
-/*
- * Function : static void synchronous (struct Scsi_Host *host, int target,
- * char *msg)
- *
- * Purpose : reprogram transfers between the selected SCSI initiator and
- * target for synchronous SCSI transfers such that the synchronous
- * offset is less than that requested and period at least as long
- * as that requested. Also modify *msg such that it contains
- * an appropriate response.
- *
- * Inputs : host - NCR53c7,8xx SCSI host, target - number SCSI target id,
- * msg - synchronous transfer request.
- */
-
-
-static void
-synchronous (struct Scsi_Host *host, int target, char *msg) {
- struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
- host->hostdata;
- int desire, divisor, i, limit;
- unsigned char scntl3, sxfer;
-/* The diagnostic message fits on one line, even with max. width integers */
- char buf[80];
-
-/* Desired transfer clock in Hz */
- desire = 1000000000L / (msg[3] * 4);
-/* Scale the available SCSI clock by 10 so we get tenths */
- divisor = (hostdata->scsi_clock * 10) / desire;
-
-/* NCR chips can handle at most an offset of 8 */
- if (msg[4] > 8)
- msg[4] = 8;
-
- if (hostdata->options & OPTION_DEBUG_SDTR)
- printk("scsi%d : optimal synchronous divisor of %d.%01d\n",
- host->host_no, divisor / 10, divisor % 10);
-
- limit = (sizeof(syncs) / sizeof(syncs[0]) -1);
- for (i = 0; (i < limit) && (divisor > syncs[i].div); ++i);
-
- if (hostdata->options & OPTION_DEBUG_SDTR)
- printk("scsi%d : selected synchronous divisor of %d.%01d\n",
- host->host_no, syncs[i].div / 10, syncs[i].div % 10);
-
- msg[3] = ((1000000000L / hostdata->scsi_clock) * syncs[i].div / 10 / 4);
-
- if (hostdata->options & OPTION_DEBUG_SDTR)
- printk("scsi%d : selected synchronous period of %dns\n", host->host_no,
- msg[3] * 4);
-
- scntl3 = (hostdata->chip / 100 == 8) ? ((hostdata->saved_scntl3 &
- ~SCNTL3_800_SCF_MASK) | (syncs[i].scf << SCNTL3_800_SCF_SHIFT)) : 0;
- sxfer = (msg[4] << SXFER_MO_SHIFT) | ((syncs[i].tp) << SXFER_TP_SHIFT);
- if (hostdata->options & OPTION_DEBUG_SDTR)
- printk ("scsi%d : sxfer=0x%x scntl3=0x%x\n",
- host->host_no, (int) sxfer, (int) scntl3);
- set_synchronous (host, target, sxfer, scntl3, 1);
- sprintf (buf, "scsi%d : setting target %d to ", host->host_no, target);
- print_synchronous (buf, msg);
-}
-
-/*
- * Function : static int NCR53c8x0_dstat_sir_intr (struct Scsi_Host *host,
- * struct NCR53c7x0_cmd *cmd)
- *
- * Purpose : Handler for INT generated instructions for the
- * NCR53c810/820 SCSI SCRIPT
- *
- * Inputs : host - pointer to this host adapter's structure,
- * cmd - pointer to the command (if any) dsa was pointing
- * to.
- *
- */
-
-static int
-NCR53c8x0_dstat_sir_intr (struct Scsi_Host *host, struct
- NCR53c7x0_cmd *cmd) {
- NCR53c7x0_local_declare();
- int print;
- Scsi_Cmnd *c = cmd ? cmd->cmd : NULL;
- struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
- host->hostdata;
- u32 dsps,*dsp; /* Argument of the INT instruction */
- NCR53c7x0_local_setup(host);
- dsps = NCR53c7x0_read32(DSPS_REG);
- dsp = (u32 *) bus_to_virt(NCR53c7x0_read32(DSP_REG));
-
- if (hostdata->options & OPTION_DEBUG_INTR)
- printk ("scsi%d : DSPS = 0x%x\n", host->host_no, dsps);
-
- switch (dsps) {
- case A_int_msg_1:
- print = 1;
- switch (hostdata->msg_buf[0]) {
- /*
- * Unless we've initiated synchronous negotiation, I don't
- * think that this should happen.
- */
- case MESSAGE_REJECT:
- hostdata->dsp = hostdata->script + hostdata->E_accept_message /
- sizeof(u32);
- hostdata->dsp_changed = 1;
- if (cmd && (cmd->flags & CMD_FLAG_SDTR)) {
- printk ("scsi%d : target %d rejected SDTR\n", host->host_no,
- c->device->id);
- cmd->flags &= ~CMD_FLAG_SDTR;
- asynchronous (host, c->device->id);
- print = 0;
- }
- break;
- case INITIATE_RECOVERY:
- printk ("scsi%d : extended contingent allegiance not supported yet, rejecting\n",
- host->host_no);
- /* Fall through to default */
- hostdata->dsp = hostdata->script + hostdata->E_reject_message /
- sizeof(u32);
- hostdata->dsp_changed = 1;
- break;
- default:
- printk ("scsi%d : unsupported message, rejecting\n",
- host->host_no);
- hostdata->dsp = hostdata->script + hostdata->E_reject_message /
- sizeof(u32);
- hostdata->dsp_changed = 1;
- }
- if (print) {
- printk ("scsi%d : received message", host->host_no);
- if (c)
- printk (" from target %d lun %d ", c->device->id, c->device->lun);
- print_msg ((unsigned char *) hostdata->msg_buf);
- printk("\n");
- }
-
- return SPECIFIC_INT_NOTHING;
-
-
- case A_int_msg_sdtr:
-/*
- * At this point, hostdata->msg_buf contains
- * 0 EXTENDED MESSAGE
- * 1 length
- * 2 SDTR
- * 3 period * 4ns
- * 4 offset
- */
-
- if (cmd) {
- char buf[80];
- sprintf (buf, "scsi%d : target %d %s ", host->host_no, c->device->id,
- (cmd->flags & CMD_FLAG_SDTR) ? "accepting" : "requesting");
- print_synchronous (buf, (unsigned char *) hostdata->msg_buf);
-
- /*
- * Initiator initiated, won't happen unless synchronous
- * transfers are enabled. If we get a SDTR message in
- * response to our SDTR, we should program our parameters
- * such that
- * offset <= requested offset
- * period >= requested period
- */
- if (cmd->flags & CMD_FLAG_SDTR) {
- cmd->flags &= ~CMD_FLAG_SDTR;
- if (hostdata->msg_buf[4])
- synchronous (host, c->device->id, (unsigned char *)
- hostdata->msg_buf);
- else
- asynchronous (host, c->device->id);
- hostdata->dsp = hostdata->script + hostdata->E_accept_message /
- sizeof(u32);
- hostdata->dsp_changed = 1;
- return SPECIFIC_INT_NOTHING;
- } else {
- if (hostdata->options & OPTION_SYNCHRONOUS) {
- cmd->flags |= CMD_FLAG_DID_SDTR;
- synchronous (host, c->device->id, (unsigned char *)
- hostdata->msg_buf);
- } else {
- hostdata->msg_buf[4] = 0; /* 0 offset = async */
- asynchronous (host, c->device->id);
- }
- patch_dsa_32 (cmd->dsa, dsa_msgout_other, 0, le32_to_cpu(5));
- patch_dsa_32 (cmd->dsa, dsa_msgout_other, 1, (u32)
- le32_to_cpu(virt_to_bus ((void *)&hostdata->msg_buf)));
- hostdata->dsp = hostdata->script +
- hostdata->E_respond_message / sizeof(u32);
- hostdata->dsp_changed = 1;
- }
- return SPECIFIC_INT_NOTHING;
- }
- /* Fall through to abort if we couldn't find a cmd, and
- therefore a dsa structure to twiddle */
- case A_int_msg_wdtr:
- hostdata->dsp = hostdata->script + hostdata->E_reject_message /
- sizeof(u32);
- hostdata->dsp_changed = 1;
- return SPECIFIC_INT_NOTHING;
- case A_int_err_unexpected_phase:
- if (hostdata->options & OPTION_DEBUG_INTR)
- printk ("scsi%d : unexpected phase\n", host->host_no);
- return SPECIFIC_INT_ABORT;
- case A_int_err_selected:
- printk ("scsi%d : selected by target %d\n", host->host_no,
- (int) NCR53c7x0_read8(SDID_REG_800) &7);
- hostdata->dsp = hostdata->script + hostdata->E_target_abort /
- sizeof(u32);
- hostdata->dsp_changed = 1;
- return SPECIFIC_INT_NOTHING;
- case A_int_err_unexpected_reselect:
- printk ("scsi%d : unexpected reselect by target %d lun %d\n",
- host->host_no, (int) NCR53c7x0_read8(SDID_REG_800) & 7,
- hostdata->reselected_identify & 7);
- hostdata->dsp = hostdata->script + hostdata->E_initiator_abort /
- sizeof(u32);
- hostdata->dsp_changed = 1;
- return SPECIFIC_INT_NOTHING;
-/*
- * Since contingent allegiance conditions are cleared by the next
- * command issued to a target, we must issue a REQUEST SENSE
- * command after receiving a CHECK CONDITION status, before
- * another command is issued.
- *
- * Since this NCR53c7x0_cmd will be freed after use, we don't
- * care if we step on the various fields, so modify a few things.
- */
- case A_int_err_check_condition:
-#if 0
- if (hostdata->options & OPTION_DEBUG_INTR)
-#endif
- printk ("scsi%d : CHECK CONDITION\n", host->host_no);
- if (!c) {
- printk("scsi%d : CHECK CONDITION with no SCSI command\n",
- host->host_no);
- return SPECIFIC_INT_PANIC;
- }
-
- /*
- * FIXME : this uses the normal one-byte selection message.
- * We may want to renegotiate for synchronous & WIDE transfers
- * since these could be the crux of our problem.
- *
- hostdata->NOP_insn* FIXME : once SCSI-II tagged queuing is implemented, we'll
- * have to set this up so that the rest of the DSA
- * agrees with this being an untagged queue'd command.
- */
-
- patch_dsa_32 (cmd->dsa, dsa_msgout, 0, le32_to_cpu(1));
-
- /*
- * Modify the table indirect for COMMAND OUT phase, since
- * Request Sense is a six byte command.
- */
-
- patch_dsa_32 (cmd->dsa, dsa_cmdout, 0, le32_to_cpu(6));
-
- c->cmnd[0] = REQUEST_SENSE;
- c->cmnd[1] &= 0xe0; /* Zero all but LUN */
- c->cmnd[2] = 0;
- c->cmnd[3] = 0;
- c->cmnd[4] = sizeof(c->sense_buffer);
- c->cmnd[5] = 0;
-
- /*
- * Disable dataout phase, and program datain to transfer to the
- * sense buffer, and add a jump to other_transfer after the
- * command so overflow/underrun conditions are detected.
- */
-
- patch_dsa_32 (cmd->dsa, dsa_dataout, 0,
- le32_to_cpu(virt_to_bus(hostdata->script) + hostdata->E_other_transfer));
- patch_dsa_32 (cmd->dsa, dsa_datain, 0,
- le32_to_cpu(virt_to_bus(cmd->data_transfer_start)));
- cmd->data_transfer_start[0] = le32_to_cpu((((DCMD_TYPE_BMI | DCMD_BMI_OP_MOVE_I |
- DCMD_BMI_IO)) << 24) | sizeof(c->sense_buffer));
- cmd->data_transfer_start[1] = (u32) le32_to_cpu(virt_to_bus(c->sense_buffer));
-
- cmd->data_transfer_start[2] = le32_to_cpu(((DCMD_TYPE_TCI | DCMD_TCI_OP_JUMP)
- << 24) | DBC_TCI_TRUE);
- cmd->data_transfer_start[3] = (u32) le32_to_cpu(virt_to_bus(hostdata->script) +
- hostdata->E_other_transfer);
-
- /*
- * Currently, this command is flagged as completed, ie
- * it has valid status and message data. Reflag it as
- * incomplete. Q - need to do something so that original
- * status, etc are used.
- */
-
- cmd->cmd->result = le32_to_cpu(0xffff);
-
- /*
- * Restart command as a REQUEST SENSE.
- */
- hostdata->dsp = (u32 *) hostdata->script + hostdata->E_select /
- sizeof(u32);
- hostdata->dsp_changed = 1;
- return SPECIFIC_INT_NOTHING;
- case A_int_debug_break:
- return SPECIFIC_INT_BREAK;
- case A_int_norm_aborted:
- hostdata->dsp = (u32 *) hostdata->schedule;
- hostdata->dsp_changed = 1;
- if (cmd)
- abnormal_finished (cmd, DID_ERROR << 16);
- return SPECIFIC_INT_NOTHING;
- case A_int_test_1:
- case A_int_test_2:
- hostdata->idle = 1;
- hostdata->test_completed = (dsps - A_int_test_1) / 0x00010000 + 1;
- if (hostdata->options & OPTION_DEBUG_INTR)
- printk("scsi%d : test%d complete\n", host->host_no,
- hostdata->test_completed);
- return SPECIFIC_INT_NOTHING;
-#ifdef A_int_debug_reselected_ok
- case A_int_debug_reselected_ok:
- if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR|
- OPTION_DEBUG_DISCONNECT)) {
- /*
- * Note - this dsa is not based on location relative to
- * the command structure, but to location relative to the
- * DSA register
- */
- u32 *dsa;
- dsa = (u32 *) bus_to_virt (NCR53c7x0_read32(DSA_REG));
-
- printk("scsi%d : reselected_ok (DSA = 0x%x (virt 0x%p)\n",
- host->host_no, NCR53c7x0_read32(DSA_REG), dsa);
- printk("scsi%d : resume address is 0x%x (virt 0x%p)\n",
- host->host_no, cmd->saved_data_pointer,
- bus_to_virt(le32_to_cpu(cmd->saved_data_pointer)));
- print_insn (host, hostdata->script + Ent_reselected_ok /
- sizeof(u32), "", 1);
- printk ("scsi%d : sxfer=0x%x, scntl3=0x%x\n",
- host->host_no, NCR53c7x0_read8(SXFER_REG),
- NCR53c7x0_read8(SCNTL3_REG_800));
- if (c) {
- print_insn (host, (u32 *)
- hostdata->sync[c->device->id].script, "", 1);
- print_insn (host, (u32 *)
- hostdata->sync[c->device->id].script + 2, "", 1);
- }
- }
- return SPECIFIC_INT_RESTART;
-#endif
-#ifdef A_int_debug_reselect_check
- case A_int_debug_reselect_check:
- if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR)) {
- u32 *dsa;
-#if 0
- u32 *code;
-#endif
- /*
- * Note - this dsa is not based on location relative to
- * the command structure, but to location relative to the
- * DSA register
- */
- dsa = bus_to_virt (NCR53c7x0_read32(DSA_REG));
- printk("scsi%d : reselected_check_next (DSA = 0x%lx (virt 0x%p))\n",
- host->host_no, virt_to_bus(dsa), dsa);
- if (dsa) {
- printk("scsi%d : resume address is 0x%x (virt 0x%p)\n",
- host->host_no, cmd->saved_data_pointer,
- bus_to_virt (le32_to_cpu(cmd->saved_data_pointer)));
-#if 0
- printk("scsi%d : template code :\n", host->host_no);
- for (code = dsa + (Ent_dsa_code_check_reselect - Ent_dsa_zero)
- / sizeof(u32); code < (dsa + Ent_dsa_zero / sizeof(u32));
- code += print_insn (host, code, "", 1));
-#endif
- }
- print_insn (host, hostdata->script + Ent_reselected_ok /
- sizeof(u32), "", 1);
- }
- return SPECIFIC_INT_RESTART;
-#endif
-#ifdef A_int_debug_dsa_schedule
- case A_int_debug_dsa_schedule:
- if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR)) {
- u32 *dsa;
- /*
- * Note - this dsa is not based on location relative to
- * the command structure, but to location relative to the
- * DSA register
- */
- dsa = (u32 *) bus_to_virt (NCR53c7x0_read32(DSA_REG));
- printk("scsi%d : dsa_schedule (old DSA = 0x%lx (virt 0x%p))\n",
- host->host_no, virt_to_bus(dsa), dsa);
- if (dsa)
- printk("scsi%d : resume address is 0x%x (virt 0x%p)\n"
- " (temp was 0x%x (virt 0x%p))\n",
- host->host_no, cmd->saved_data_pointer,
- bus_to_virt (le32_to_cpu(cmd->saved_data_pointer)),
- NCR53c7x0_read32 (TEMP_REG),
- bus_to_virt (NCR53c7x0_read32(TEMP_REG)));
- }
- return SPECIFIC_INT_RESTART;
-#endif
-#ifdef A_int_debug_scheduled
- case A_int_debug_scheduled:
- if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR)) {
- printk("scsi%d : new I/O 0x%x (virt 0x%p) scheduled\n",
- host->host_no, NCR53c7x0_read32(DSA_REG),
- bus_to_virt(NCR53c7x0_read32(DSA_REG)));
- }
- return SPECIFIC_INT_RESTART;
-#endif
-#ifdef A_int_debug_idle
- case A_int_debug_idle:
- if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR)) {
- printk("scsi%d : idle\n", host->host_no);
- }
- return SPECIFIC_INT_RESTART;
-#endif
-#ifdef A_int_debug_cmd
- case A_int_debug_cmd:
- if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR)) {
- printk("scsi%d : command sent\n");
- }
- return SPECIFIC_INT_RESTART;
-#endif
-#ifdef A_int_debug_dsa_loaded
- case A_int_debug_dsa_loaded:
- if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR)) {
- printk("scsi%d : DSA loaded with 0x%x (virt 0x%p)\n", host->host_no,
- NCR53c7x0_read32(DSA_REG),
- bus_to_virt(NCR53c7x0_read32(DSA_REG)));
- }
- return SPECIFIC_INT_RESTART;
-#endif
-#ifdef A_int_debug_reselected
- case A_int_debug_reselected:
- if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR|
- OPTION_DEBUG_DISCONNECT)) {
- printk("scsi%d : reselected by target %d lun %d\n",
- host->host_no, (int) NCR53c7x0_read8(SDID_REG_800) & ~0x80,
- (int) hostdata->reselected_identify & 7);
- print_queues(host);
- }
- return SPECIFIC_INT_RESTART;
-#endif
-#ifdef A_int_debug_disconnect_msg
- case A_int_debug_disconnect_msg:
- if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR)) {
- if (c)
- printk("scsi%d : target %d lun %d disconnecting\n",
- host->host_no, c->device->id, c->device->lun);
- else
- printk("scsi%d : unknown target disconnecting\n",
- host->host_no);
- }
- return SPECIFIC_INT_RESTART;
-#endif
-#ifdef A_int_debug_disconnected
- case A_int_debug_disconnected:
- if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR|
- OPTION_DEBUG_DISCONNECT)) {
- printk ("scsi%d : disconnected, new queues are\n",
- host->host_no);
- print_queues(host);
-#if 0
- printk ("scsi%d : sxfer=0x%x, scntl3=0x%x\n",
- host->host_no, NCR53c7x0_read8(SXFER_REG),
- NCR53c7x0_read8(SCNTL3_REG_800));
-#endif
- if (c) {
- print_insn (host, (u32 *)
- hostdata->sync[c->device->id].script, "", 1);
- print_insn (host, (u32 *)
- hostdata->sync[c->device->id].script + 2, "", 1);
- }
- }
- return SPECIFIC_INT_RESTART;
-#endif
-#ifdef A_int_debug_panic
- case A_int_debug_panic:
- printk("scsi%d : int_debug_panic received\n", host->host_no);
- print_lots (host);
- return SPECIFIC_INT_PANIC;
-#endif
-#ifdef A_int_debug_saved
- case A_int_debug_saved:
- if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR|
- OPTION_DEBUG_DISCONNECT)) {
- printk ("scsi%d : saved data pointer 0x%x (virt 0x%p)\n",
- host->host_no, cmd->saved_data_pointer,
- bus_to_virt (le32_to_cpu(cmd->saved_data_pointer)));
- print_progress (c);
- }
- return SPECIFIC_INT_RESTART;
-#endif
-#ifdef A_int_debug_restored
- case A_int_debug_restored:
- if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR|
- OPTION_DEBUG_DISCONNECT)) {
- if (cmd) {
- int size;
- printk ("scsi%d : restored data pointer 0x%x (virt 0x%p)\n",
- host->host_no, cmd->saved_data_pointer, bus_to_virt (
- le32_to_cpu(cmd->saved_data_pointer)));
- size = print_insn (host, (u32 *)
- bus_to_virt(le32_to_cpu(cmd->saved_data_pointer)), "", 1);
- size = print_insn (host, (u32 *)
- bus_to_virt(le32_to_cpu(cmd->saved_data_pointer)) + size, "", 1);
- print_progress (c);
- }
-#if 0
- printk ("scsi%d : datapath residual %d\n",
- host->host_no, datapath_residual (host)) ;
-#endif
- }
- return SPECIFIC_INT_RESTART;
-#endif
-#ifdef A_int_debug_sync
- case A_int_debug_sync:
- if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR|
- OPTION_DEBUG_DISCONNECT|OPTION_DEBUG_SDTR)) {
- unsigned char sxfer = NCR53c7x0_read8 (SXFER_REG),
- scntl3 = NCR53c7x0_read8 (SCNTL3_REG_800);
- if (c) {
- if (sxfer != hostdata->sync[c->device->id].sxfer_sanity ||
- scntl3 != hostdata->sync[c->device->id].scntl3_sanity) {
- printk ("scsi%d : sync sanity check failed sxfer=0x%x, scntl3=0x%x",
- host->host_no, sxfer, scntl3);
- NCR53c7x0_write8 (SXFER_REG, sxfer);
- NCR53c7x0_write8 (SCNTL3_REG_800, scntl3);
- }
- } else
- printk ("scsi%d : unknown command sxfer=0x%x, scntl3=0x%x\n",
- host->host_no, (int) sxfer, (int) scntl3);
- }
- return SPECIFIC_INT_RESTART;
-#endif
-#ifdef A_int_debug_datain
- case A_int_debug_datain:
- if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR|
- OPTION_DEBUG_DISCONNECT|OPTION_DEBUG_SDTR)) {
- int size;
- printk ("scsi%d : In do_datain (%s) sxfer=0x%x, scntl3=0x%x\n"
- " datapath residual=%d\n",
- host->host_no, sbcl_to_phase (NCR53c7x0_read8 (SBCL_REG)),
- (int) NCR53c7x0_read8(SXFER_REG),
- (int) NCR53c7x0_read8(SCNTL3_REG_800),
- datapath_residual (host)) ;
- print_insn (host, dsp, "", 1);
- size = print_insn (host, (u32 *) bus_to_virt(le32_to_cpu(dsp[1])), "", 1);
- print_insn (host, (u32 *) bus_to_virt(le32_to_cpu(dsp[1])) + size, "", 1);
- }
- return SPECIFIC_INT_RESTART;
-#endif
-/*
- * FIXME : for 7xx support, we need to read SDID_REG_700 and handle
- * the comparison as bitfielded, not binary.
- */
-#ifdef A_int_debug_check_dsa
- case A_int_debug_check_dsa:
- if (NCR53c7x0_read8 (SCNTL1_REG) & SCNTL1_CON) {
- int sdid = NCR53c7x0_read8 (SDID_REG_800) & 15;
- char *where = dsp - NCR53c7x0_insn_size(NCR53c7x0_read8
- (DCMD_REG)) == hostdata->script +
- Ent_select_check_dsa / sizeof(u32) ?
- "selection" : "reselection";
- if (c && sdid != c->device->id) {
- printk ("scsi%d : SDID target %d != DSA target %d at %s\n",
- host->host_no, sdid, c->device->id, where);
- print_lots(host);
- dump_events (host, 20);
- return SPECIFIC_INT_PANIC;
- }
- }
- return SPECIFIC_INT_RESTART;
-#endif
- default:
- if ((dsps & 0xff000000) == 0x03000000) {
- printk ("scsi%d : misc debug interrupt 0x%x\n",
- host->host_no, dsps);
- return SPECIFIC_INT_RESTART;
- } else if ((dsps & 0xff000000) == 0x05000000) {
- if (hostdata->events) {
- struct NCR53c7x0_event *event;
- ++hostdata->event_index;
- if (hostdata->event_index >= hostdata->event_size)
- hostdata->event_index = 0;
- event = (struct NCR53c7x0_event *) hostdata->events +
- hostdata->event_index;
- event->event = (enum ncr_event) dsps;
- event->dsa = bus_to_virt(NCR53c7x0_read32(DSA_REG));
- /* FIXME : this needs to change for the '7xx family */
- if (NCR53c7x0_read8 (SCNTL1_REG) & SCNTL1_CON)
- event->target = NCR53c7x0_read8(SSID_REG_800);
- else
- event->target = 255;
-
- if (event->event == EVENT_RESELECT)
- event->lun = hostdata->reselected_identify & 0xf;
- else if (c)
- event->lun = c->device->lun;
- else
- event->lun = 255;
- do_gettimeofday(&(event->time));
- if (c) {
- event->pid = c->pid;
- memcpy ((void *) event->cmnd, (void *) c->cmnd,
- sizeof (event->cmnd));
- } else {
- event->pid = -1;
- }
- }
- return SPECIFIC_INT_RESTART;
- }
-
- printk ("scsi%d : unknown user interrupt 0x%x\n",
- host->host_no, (unsigned) dsps);
- return SPECIFIC_INT_PANIC;
- }
-}
-
-/*
- * XXX - the stock NCR assembler won't output the scriptu.h file,
- * which undefine's all #define'd CPP symbols from the script.h
- * file, which will create problems if you use multiple scripts
- * with the same symbol names.
- *
- * If you insist on using NCR's assembler, you could generate
- * scriptu.h from script.h using something like
- *
- * grep #define script.h | \
- * sed 's/#define[ ][ ]*\([_a-zA-Z][_a-zA-Z0-9]*\).*$/#undefine \1/' \
- * > scriptu.h
- */
-
-#include "53c8xx_u.h"
-
-/* XXX - add alternate script handling code here */
-
-
-#ifdef NCR_DEBUG
-/*
- * Debugging without a debugger is no fun. So, I've provided
- * a debugging interface in the NCR53c7x0 driver. To avoid
- * kernel cruft, there's just enough here to act as an interface
- * to a user level debugger (aka, GDB).
- *
- *
- * The following restrictions apply to debugger commands :
- * 1. The command must be terminated by a newline.
- * 2. Command length must be less than 80 bytes including the
- * newline.
- * 3. The entire command must be written with one system call.
- */
-
-static const char debugger_help =
-"bc <addr> - clear breakpoint\n"
-"bl - list breakpoints\n"
-"bs <addr> - set breakpoint\n"
-"g - start\n"
-"h - halt\n"
-"? - this message\n"
-"i - info\n"
-"mp <addr> <size> - print memory\n"
-"ms <addr> <size> <value> - store memory\n"
-"rp <num> <size> - print register\n"
-"rs <num> <size> <value> - store register\n"
-"s - single step\n"
-"tb - begin trace \n"
-"te - end trace\n";
-
-/*
- * Whenever we change a break point, we should probably
- * set the NCR up so that it is in a single step mode.
- */
-
-static int debugger_fn_bc (struct Scsi_Host *host, struct debugger_token *token,
- u32 args[]) {
- struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
- instance->hostdata;
- struct NCR53c7x0_break *bp, **prev;
- unsigned long flags;
- save_flags(flags);
- cli();
- for (bp = (struct NCR53c7x0_break *) instance->breakpoints,
- prev = (struct NCR53c7x0_break **) &instance->breakpoints;
- bp; prev = (struct NCR53c7x0_break **) &(bp->next),
- bp = (struct NCR53c7x0_break *) bp->next);
-
- if (!bp) {
- restore_flags(flags);
- return -EIO;
- }
-
- /*
- * XXX - we need to insure that the processor is halted
- * here in order to prevent a race condition.
- */
-
- memcpy ((void *) bp->addr, (void *) bp->old, sizeof(bp->old));
- if (prev)
- *prev = bp->next;
-
- restore_flags(flags);
- return 0;
-}
-
-
-static int
-debugger_fn_bl (struct Scsi_Host *host, struct debugger_token *token,
- u32 args[]) {
- struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
- host->hostdata;
- struct NCR53c7x0_break *bp;
- char buf[80];
- size_t len;
- unsigned long flags;
- /*
- * XXX - we need to insure that the processor is halted
- * here in order to prevent a race condition. So, if the
- * processor isn't halted, print an error message and continue.
- */
-
- sprintf (buf, "scsi%d : bp : warning : processor not halted\b",
- host->host_no);
- debugger_kernel_write (host, buf, strlen(buf));
-
- save_flags(flags);
- cli();
- for (bp = (struct NCR53c7x0_break *) host->breakpoints;
- bp; bp = (struct NCR53c7x0_break *) bp->next) {
- sprintf (buf, "scsi%d : bp : success : at %08x, replaces %08x %08x",
- bp->addr, bp->old[0], bp->old[1]);
- len = strlen(buf);
- if ((bp->old[0] & (DCMD_TYPE_MASK << 24)) ==
- (DCMD_TYPE_MMI << 24)) {
- sprintf(buf + len, "%08x\n", * (u32 *) bp->addr);
- } else {
- sprintf(buf + len, "\n");
- }
- len = strlen(buf);
- debugger_kernel_write (host, buf, len);
- }
- restore_flags(flags);
- return 0;
-}
-
-static int
-debugger_fn_bs (struct Scsi_Host *host, struct debugger_token *token,
- u32 args[]) {
- struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
- host->hostdata;
- struct NCR53c7x0_break *bp;
- char buf[80];
- size_t len;
- unsigned long flags;
- save_flags(flags);
- cli();
-
- if (hostdata->state != STATE_HALTED) {
- sprintf (buf, "scsi%d : bs : failure : NCR not halted\n", host->host_no);
- debugger_kernel_write (host, buf, strlen(buf));
- restore_flags(flags);
- return -1;
- }
-
- if (!(bp = kmalloc (sizeof (struct NCR53c7x0_break)))) {
- printk ("scsi%d : kmalloc(%d) of breakpoint structure failed, try again\n",
- host->host_no, sizeof(struct NCR53c7x0_break));
- restore_flags(flags);
- return -1;
- }
-
- bp->address = (u32 *) args[0];
- memcpy ((void *) bp->old_instruction, (void *) bp->address, 8);
- bp->old_size = (((bp->old_instruction[0] >> 24) & DCMD_TYPE_MASK) ==
- DCMD_TYPE_MMI ? 3 : 2;
- bp->next = hostdata->breakpoints;
- hostdata->breakpoints = bp->next;
- memcpy ((void *) bp->address, (void *) hostdata->E_debug_break, 8);
-
- restore_flags(flags);
- return 0;
-}
-
-#define TOKEN(name,nargs) {#name, nargs, debugger_fn_##name}
-static const struct debugger_token {
- char *name;
- int numargs;
- int (*fn)(struct debugger_token *token, u32 args[]);
-} debugger_tokens[] = {
- TOKEN(bc,1), TOKEN(bl,0), TOKEN(bs,1), TOKEN(g,0), TOKEN(halt,0),
- {DT_help, "?", 0} , TOKEN(h,0), TOKEN(i,0), TOKEN(mp,2),
- TOKEN(ms,3), TOKEN(rp,2), TOKEN(rs,2), TOKEN(s,0), TOKEN(tb,0), TOKEN(te,0)
-};
-
-#define NDT sizeof(debugger_tokens / sizeof(struct debugger_token))
-
-static struct Scsi_Host * inode_to_host (struct inode *inode) {
- int dev;
- struct Scsi_Host *tmp;
- for (dev = MINOR(inode->rdev), host = first_host;
- (host->hostt == the_template); --dev, host = host->next)
- if (!dev) return host;
- return NULL;
-}
-
-
-static int
-debugger_user_write (struct inode *inode,struct file *filp,
- char *buf,int count) {
- struct Scsi_Host *host; /* This SCSI host */
- struct NCR53c7x0_hostadata *hostdata;
- char input_buf[80], /* Kernel space copy of buf */
- *ptr; /* Pointer to argument list */
- u32 args[3]; /* Arguments */
- int i, j, error, len;
-
- if (!(host = inode_to_host(inode)))
- return -ENXIO;
-
- hostdata = (struct NCR53c7x0_hostdata *) host->hostdata;
-
- if (error = verify_area(VERIFY_READ,buf,count))
- return error;
-
- if (count > 80)
- return -EIO;
-
- memcpy_from_fs(input_buf, buf, count);
-
- if (input_buf[count - 1] != '\n')
- return -EIO;
-
- input_buf[count - 1]=0;
-
- for (i = 0; i < NDT; ++i) {
- len = strlen (debugger_tokens[i].name);
- if (!strncmp(input_buf, debugger_tokens[i].name, len))
- break;
- };
-
- if (i == NDT)
- return -EIO;
-
- for (ptr = input_buf + len, j = 0; j < debugger_tokens[i].nargs && *ptr;) {
- if (*ptr == ' ' || *ptr == '\t') {
- ++ptr;
- } else if (isdigit(*ptr)) {
- args[j++] = simple_strtoul (ptr, &ptr, 0);
- } else {
- return -EIO;
- }
- }
-
- if (j != debugger_tokens[i].nargs)
- return -EIO;
-
- return count;
-}
-
-static int
-debugger_user_read (struct inode *inode,struct file *filp,
- char *buf,int count) {
- struct Scsi_Host *instance;
-
-}
-
-static int
-debugger_kernel_write (struct Scsi_Host *host, char *buf, size_t
- buflen) {
- struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
- host->hostdata;
- int copy, left;
- unsigned long flags;
- save_flags(flags);
- cli();
- while (buflen) {
- left = (hostdata->debug_buf + hostdata->debug_size - 1) -
- hostdata->debug_write;
- copy = (buflen <= left) ? buflen : left;
- memcpy (hostdata->debug_write, buf, copy);
- buf += copy;
- buflen -= copy;
- hostdata->debug_count += copy;
- if ((hostdata->debug_write += copy) ==
- (hostdata->debug_buf + hostdata->debug_size))
- hosdata->debug_write = hostdata->debug_buf;
- }
- restore_flags(flags);
-}
-
-#endif /* def NCRDEBUG */
-
-/*
- * Function : static void NCR538xx_soft_reset (struct Scsi_Host *host)
- *
- * Purpose : perform a soft reset of the NCR53c8xx chip
- *
- * Inputs : host - pointer to this host adapter's structure
- *
- * Preconditions : NCR53c7x0_init must have been called for this
- * host.
- *
- */
-
-static void
-NCR53c8x0_soft_reset (struct Scsi_Host *host) {
- NCR53c7x0_local_declare();
- struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
- host->hostdata;
- NCR53c7x0_local_setup(host);
-
-
- /*
- * Do a soft reset of the chip so that everything is
- * reinitialized to the power-on state.
- *
- * Basically follow the procedure outlined in the NCR53c700
- * data manual under Chapter Six, How to Use, Steps Necessary to
- * Start SCRIPTS, with the exception of actually starting the
- * script and setting up the synchronous transfer gunk.
- */
-
- NCR53c7x0_write8(ISTAT_REG_800, ISTAT_10_SRST);
- NCR53c7x0_write8(ISTAT_REG_800, 0);
- NCR53c7x0_write8(hostdata->dmode, hostdata->saved_dmode & ~DMODE_MAN);
-
-
- /*
- * Respond to reselection by targets and use our _initiator_ SCSI ID
- * for arbitration. If notyet, also respond to SCSI selection.
- *
- * XXX - Note : we must reprogram this when reselecting as
- * a target.
- */
-
-#ifdef notyet
- NCR53c7x0_write8(SCID_REG, (host->this_id & 7)|SCID_800_RRE|SCID_800_SRE);
-#else
- NCR53c7x0_write8(SCID_REG, (host->this_id & 7)|SCID_800_RRE);
-#endif
- NCR53c7x0_write8(RESPID_REG_800, hostdata->this_id_mask);
-
- /*
- * Use a maximum (1.6) second handshake to handshake timeout,
- * and SCSI recommended .5s selection timeout.
- */
-
- /*
- * The new gcc won't recognize preprocessing directives
- * within macro args.
- */
-#if 0
- NCR53c7x0_write8(STIME0_REG_800,
- ((selection_timeout << STIME0_800_SEL_SHIFT) & STIME0_800_SEL_MASK)
- | ((15 << STIME0_800_HTH_SHIFT) & STIME0_800_HTH_MASK));
-#else
-/* Disable HTH interrupt */
- NCR53c7x0_write8(STIME0_REG_800,
- ((selection_timeout << STIME0_800_SEL_SHIFT) & STIME0_800_SEL_MASK));
-#endif
-
-
- /*
- * Enable active negation for happy synchronous transfers.
- */
-
- NCR53c7x0_write8(STEST3_REG_800, STEST3_800_TE);
-
- /*
- * Enable all interrupts, except parity which we only want when
- * the user requests it.
- */
-
- NCR53c7x0_write8(DIEN_REG, DIEN_800_MDPE | DIEN_800_BF |
- DIEN_ABRT | DIEN_SSI | DIEN_SIR | DIEN_800_IID);
-
-
- NCR53c7x0_write8(SIEN0_REG_800, ((hostdata->options & OPTION_PARITY) ?
- SIEN_PAR : 0) | SIEN_RST | SIEN_UDC | SIEN_SGE | SIEN_MA);
- NCR53c7x0_write8(SIEN1_REG_800, SIEN1_800_STO | SIEN1_800_HTH);
-
- /*
- * Use saved clock frequency divisor and scripts loaded in 16 bit
- * mode flags from the saved dcntl.
- */
-
- NCR53c7x0_write8(DCNTL_REG, hostdata->saved_dcntl);
- NCR53c7x0_write8(CTEST4_REG_800, hostdata->saved_ctest4);
-
- /* Enable active negation */
- NCR53c7x0_write8(STEST3_REG_800, STEST3_800_TE);
-}
-
-/*
- * Function static struct NCR53c7x0_cmd *allocate_cmd (Scsi_Cmnd *cmd)
- *
- * Purpose : Return the first free NCR53c7x0_cmd structure (which are
- * reused in a LIFO manner to minimize cache thrashing).
- *
- * Side effects : If we haven't yet scheduled allocation of NCR53c7x0_cmd
- * structures for this device, do so. Attempt to complete all scheduled
- * allocations using kmalloc(), putting NCR53c7x0_cmd structures on
- * the free list. Teach programmers not to drink and hack.
- *
- * Inputs : cmd - SCSI command
- *
- * Returns : NCR53c7x0_cmd structure allocated on behalf of cmd;
- * NULL on failure.
- */
-
-static struct NCR53c7x0_cmd *
-allocate_cmd (Scsi_Cmnd *cmd) {
- struct Scsi_Host *host = cmd->device->host;
- struct NCR53c7x0_hostdata *hostdata =
- (struct NCR53c7x0_hostdata *) host->hostdata;
- void *real; /* Real address */
- int size; /* Size of *tmp */
- struct NCR53c7x0_cmd *tmp;
- unsigned long flags;
-
- if (hostdata->options & OPTION_DEBUG_ALLOCATION)
- printk ("scsi%d : num_cmds = %d, can_queue = %d\n"
- " target = %d, lun = %d, %s\n",
- host->host_no, hostdata->num_cmds, host->can_queue,
- cmd->device->id, cmd->device->lun, (hostdata->cmd_allocated[cmd->device->id] &
- (1 << cmd->device->lun)) ? "already allocated" : "not allocated");
-
-/*
- * If we have not yet reserved commands for this I_T_L nexus, and
- * the device exists (as indicated by permanent Scsi_Cmnd structures
- * being allocated under 1.3.x, or being outside of scan_scsis in
- * 1.2.x), do so now.
- */
- if (!(hostdata->cmd_allocated[cmd->device->id] & (1 << cmd->device->lun)) &&
- cmd->device && cmd->device->has_cmdblocks
- ) {
- if ((hostdata->extra_allocate + hostdata->num_cmds) < host->can_queue)
- hostdata->extra_allocate += host->cmd_per_lun;
- hostdata->cmd_allocated[cmd->device->id] |= (1 << cmd->device->lun);
- }
-
- for (; hostdata->extra_allocate > 0 ; --hostdata->extra_allocate,
- ++hostdata->num_cmds) {
- /* historically, kmalloc has returned unaligned addresses; pad so we
- have enough room to ROUNDUP */
- size = hostdata->max_cmd_size + sizeof (void *);
-/* FIXME: for ISA bus '7xx chips, we need to or GFP_DMA in here */
- real = kmalloc (size, GFP_ATOMIC);
- if (!real) {
- if (hostdata->options & OPTION_DEBUG_ALLOCATION)
- printk ("scsi%d : kmalloc(%d) failed\n",
- host->host_no, size);
- break;
- }
- tmp = ROUNDUP(real, void *);
- tmp->real = real;
- tmp->size = size;
- tmp->free = ((void (*)(void *, int)) kfree);
- save_flags (flags);
- cli();
- tmp->next = hostdata->free;
- hostdata->free = tmp;
- restore_flags (flags);
- }
- save_flags(flags);
- cli();
- tmp = (struct NCR53c7x0_cmd *) hostdata->free;
- if (tmp) {
- hostdata->free = tmp->next;
- }
- restore_flags(flags);
- if (!tmp)
- printk ("scsi%d : can't allocate command for target %d lun %d\n",
- host->host_no, cmd->device->id, cmd->device->lun);
- return tmp;
-}
-
-/*
- * Function static struct NCR53c7x0_cmd *create_cmd (Scsi_Cmnd *cmd)
- *
- *
- * Purpose : allocate a NCR53c7x0_cmd structure, initialize it based on the
- * Scsi_Cmnd structure passed in cmd, including dsa and Linux field
- * initialization, and dsa code relocation.
- *
- * Inputs : cmd - SCSI command
- *
- * Returns : NCR53c7x0_cmd structure corresponding to cmd,
- * NULL on failure.
- */
-
-static struct NCR53c7x0_cmd *
-create_cmd (Scsi_Cmnd *cmd) {
- NCR53c7x0_local_declare();
- struct Scsi_Host *host = cmd->device->host;
- struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
- host->hostdata;
- struct NCR53c7x0_cmd *tmp; /* NCR53c7x0_cmd structure for this command */
- int datain, /* Number of instructions per phase */
- dataout;
- int data_transfer_instructions, /* Count of dynamic instructions */
- i; /* Counter */
- u32 *cmd_datain, /* Address of datain/dataout code */
- *cmd_dataout; /* Incremented as we assemble */
-#ifdef notyet
- unsigned char *msgptr; /* Current byte in select message */
- int msglen; /* Length of whole select message */
-#endif
- unsigned long flags;
- NCR53c7x0_local_setup(cmd->device->host);
-
- if (!(tmp = allocate_cmd (cmd)))
- return NULL;
-
-
- /*
- * Decide whether we need to generate commands for DATA IN,
- * DATA OUT, neither, or both based on the SCSI command
- */
-
- switch (cmd->cmnd[0]) {
- /* These commands do DATA IN */
- case INQUIRY:
- case MODE_SENSE:
- case READ_6:
- case READ_10:
- case READ_CAPACITY:
- case REQUEST_SENSE:
- datain = 2 * (cmd->use_sg ? cmd->use_sg : 1) + 3;
- dataout = 0;
- break;
- /* These commands do DATA OUT */
- case MODE_SELECT:
- case WRITE_6:
- case WRITE_10:
-#if 0
- printk("scsi%d : command is ", host->host_no);
- print_command(cmd->cmnd);
-#endif
-#if 0
- printk ("scsi%d : %d scatter/gather segments\n", host->host_no,
- cmd->use_sg);
-#endif
- datain = 0;
- dataout = 2 * (cmd->use_sg ? cmd->use_sg : 1) + 3;
-#if 0
- hostdata->options |= OPTION_DEBUG_INTR;
-#endif
- break;
- /*
- * These commands do no data transfer, we should force an
- * interrupt if a data phase is attempted on them.
- */
- case START_STOP: /* also SCAN, which may do DATA OUT */
- case TEST_UNIT_READY:
- datain = dataout = 0;
- break;
- /*
- * We don't know about these commands, so generate code to handle
- * both DATA IN and DATA OUT phases.
- */
- default:
- datain = dataout = 2 * (cmd->use_sg ? cmd->use_sg : 1) + 3;
- }
-
- /*
- * New code : so that active pointers work correctly regardless
- * of where the saved data pointer is at, we want to immediately
- * enter the dynamic code after selection, and on a non-data
- * phase perform a CALL to the non-data phase handler, with
- * returns back to this address.
- *
- * If a phase mismatch is encountered in the middle of a
- * Block MOVE instruction, we want to _leave_ that instruction
- * unchanged as the current case is, modify a temporary buffer,
- * and point the active pointer (TEMP) at that.
- *
- * Furthermore, we want to implement a saved data pointer,
- * set by the SAVE_DATA_POINTERs message.
- *
- * So, the data transfer segments will change to
- * CALL data_transfer, WHEN NOT data phase
- * MOVE x, x, WHEN data phase
- * ( repeat )
- * JUMP other_transfer
- */
-
- data_transfer_instructions = datain + dataout;
-
- /*
- * When we perform a request sense, we overwrite various things,
- * including the data transfer code. Make sure we have enough
- * space to do that.
- */
-
- if (data_transfer_instructions < 2)
- data_transfer_instructions = 2;
-
-
- /*
- * The saved data pointer is set up so that a RESTORE POINTERS message
- * will start the data transfer over at the beginning.
- */
-
- tmp->saved_data_pointer = le32_to_cpu(virt_to_bus (hostdata->script) +
- hostdata->E_data_transfer);
-
- /*
- * Initialize Linux specific fields.
- */
-
- tmp->cmd = cmd;
- tmp->next = NULL;
- tmp->flags = 0;
- tmp->dsa_next_addr = le32_to_cpu(virt_to_bus(tmp->dsa) + hostdata->dsa_next -
- hostdata->dsa_start);
- tmp->dsa_addr = le32_to_cpu(virt_to_bus(tmp->dsa) - hostdata->dsa_start);
-
- /*
- * Calculate addresses of dynamic code to fill in DSA
- */
-
- tmp->data_transfer_start = tmp->dsa + (hostdata->dsa_end -
- hostdata->dsa_start) / sizeof(u32);
- tmp->data_transfer_end = tmp->data_transfer_start +
- 2 * data_transfer_instructions;
-
- cmd_datain = datain ? tmp->data_transfer_start : NULL;
- cmd_dataout = dataout ? (datain ? cmd_datain + 2 * datain : tmp->
- data_transfer_start) : NULL;
-
- /*
- * Fill in the NCR53c7x0_cmd structure as follows
- * dsa, with fixed up DSA code
- * datain code
- * dataout code
- */
-
- /* Copy template code into dsa and perform all necessary fixups */
- if (hostdata->dsa_fixup)
- hostdata->dsa_fixup(tmp);
-
- patch_dsa_32(tmp->dsa, dsa_next, 0, le32_to_cpu(0));
- patch_dsa_32(tmp->dsa, dsa_cmnd, 0, le32_to_cpu(virt_to_bus(cmd)));
-
- if (hostdata->options & OPTION_DEBUG_SYNCHRONOUS)
- if (hostdata->sync[cmd->device->id].select_indirect !=
- ((hostdata->sync[cmd->device->id].scntl3_sanity << 24) |
- (cmd->device->id << 16) |
- (hostdata->sync[cmd->device->id].sxfer_sanity << 8))) {
- printk ("scsi%d : sanity check failed select_indirect=0x%x\n",
- host->host_no, hostdata->sync[cmd->device->id].select_indirect);
- FATAL(host);
-
- }
-
- patch_dsa_32(tmp->dsa, dsa_select, 0, le32_to_cpu(hostdata->sync[cmd->device->id].
- select_indirect));
- /*
- * Right now, we'll do the WIDE and SYNCHRONOUS negotiations on
- * different commands; although it should be trivial to do them
- * both at the same time.
- */
- if (hostdata->initiate_wdtr & (1 << cmd->device->id)) {
- memcpy ((void *) (tmp->select + 1), (void *) wdtr_message,
- sizeof(wdtr_message));
- patch_dsa_32(tmp->dsa, dsa_msgout, 0, le32_to_cpu(1 + sizeof(wdtr_message)));
- save_flags(flags);
- cli();
- hostdata->initiate_wdtr &= ~(1 << cmd->device->id);
- restore_flags(flags);
- } else if (hostdata->initiate_sdtr & (1 << cmd->device->id)) {
- memcpy ((void *) (tmp->select + 1), (void *) sdtr_message,
- sizeof(sdtr_message));
- patch_dsa_32(tmp->dsa, dsa_msgout, 0, le32_to_cpu(1 + sizeof(sdtr_message)));
- tmp->flags |= CMD_FLAG_SDTR;
- save_flags(flags);
- cli();
- hostdata->initiate_sdtr &= ~(1 << cmd->device->id);
- restore_flags(flags);
-
- }
-#if 1
- else if (!(hostdata->talked_to & (1 << cmd->device->id)) &&
- !(hostdata->options & OPTION_NO_ASYNC)) {
- memcpy ((void *) (tmp->select + 1), (void *) async_message,
- sizeof(async_message));
- patch_dsa_32(tmp->dsa, dsa_msgout, 0, le32_to_cpu(1 + sizeof(async_message)));
- tmp->flags |= CMD_FLAG_SDTR;
- }
-#endif
- else
- patch_dsa_32(tmp->dsa, dsa_msgout, 0, le32_to_cpu(1));
- hostdata->talked_to |= (1 << cmd->device->id);
- tmp->select[0] = (hostdata->options & OPTION_DISCONNECT) ?
- IDENTIFY (1, cmd->device->lun) : IDENTIFY (0, cmd->device->lun);
- patch_dsa_32(tmp->dsa, dsa_msgout, 1, le32_to_cpu(virt_to_bus(tmp->select)));
- patch_dsa_32(tmp->dsa, dsa_cmdout, 0, le32_to_cpu(cmd->cmd_len));
- patch_dsa_32(tmp->dsa, dsa_cmdout, 1, le32_to_cpu(virt_to_bus(cmd->cmnd)));
- patch_dsa_32(tmp->dsa, dsa_dataout, 0, le32_to_cpu(cmd_dataout ?
- virt_to_bus (cmd_dataout)
- : virt_to_bus (hostdata->script) + hostdata->E_other_transfer));
- patch_dsa_32(tmp->dsa, dsa_datain, 0, le32_to_cpu(cmd_datain ?
- virt_to_bus (cmd_datain)
- : virt_to_bus (hostdata->script) + hostdata->E_other_transfer));
- /*
- * XXX - need to make endian aware, should use separate variables
- * for both status and message bytes.
- */
- patch_dsa_32(tmp->dsa, dsa_msgin, 0, le32_to_cpu(1));
-/*
- * FIXME : these only works for little endian. We probably want to
- * provide message and status fields in the NCR53c7x0_cmd
- * structure, and assign them to cmd->result when we're done.
- */
- patch_dsa_32(tmp->dsa, dsa_msgin, 1, le32_to_cpu(virt_to_bus(&cmd->result) + 1));
- patch_dsa_32(tmp->dsa, dsa_status, 0, le32_to_cpu(1));
- patch_dsa_32(tmp->dsa, dsa_status, 1, le32_to_cpu(virt_to_bus(&cmd->result)));
- patch_dsa_32(tmp->dsa, dsa_msgout_other, 0, le32_to_cpu(1));
- patch_dsa_32(tmp->dsa, dsa_msgout_other, 1,
- le32_to_cpu(virt_to_bus(&(hostdata->NCR53c7xx_msg_nop))));
-
- /*
- * Generate code for zero or more of the DATA IN, DATA OUT phases
- * in the format
- *
- * CALL data_transfer, WHEN NOT phase
- * MOVE first buffer length, first buffer address, WHEN phase
- * ...
- * MOVE last buffer length, last buffer address, WHEN phase
- * JUMP other_transfer
- */
-
-/*
- * See if we're getting to data transfer by generating an unconditional
- * interrupt.
- */
-#if 0
- if (datain) {
- cmd_datain[0] = 0x98080000;
- cmd_datain[1] = 0x03ffd00d;
- cmd_datain += 2;
- }
-#endif
-
-/*
- * XXX - I'm undecided whether all of this nonsense is faster
- * in the long run, or whether I should just go and implement a loop
- * on the NCR chip using table indirect mode?
- *
- * In any case, this is how it _must_ be done for 53c700/700-66 chips,
- * so this stays even when we come up with something better.
- *
- * When we're limited to 1 simultaneous command, no overlapping processing,
- * we're seeing 630K/sec, with 7% CPU usage on a slow Syquest 45M
- * drive.
- *
- * Not bad, not good. We'll see.
- */
-
- for (i = 0; cmd->use_sg ? (i < cmd->use_sg) : !i; cmd_datain += 4,
- cmd_dataout += 4, ++i) {
- u32 buf = cmd->use_sg ?
- virt_to_bus(((struct scatterlist *)cmd->buffer)[i].address) :
- virt_to_bus(cmd->request_buffer);
- u32 count = cmd->use_sg ?
- ((struct scatterlist *)cmd->buffer)[i].length :
- cmd->request_bufflen;
-
- if (datain) {
- /* CALL other_in, WHEN NOT DATA_IN */
- cmd_datain[0] = le32_to_cpu(((DCMD_TYPE_TCI | DCMD_TCI_OP_CALL |
- DCMD_TCI_IO) << 24) |
- DBC_TCI_WAIT_FOR_VALID | DBC_TCI_COMPARE_PHASE);
- cmd_datain[1] = le32_to_cpu(virt_to_bus (hostdata->script) +
- hostdata->E_other_in);
- /* MOVE count, buf, WHEN DATA_IN */
- cmd_datain[2] = le32_to_cpu(((DCMD_TYPE_BMI | DCMD_BMI_OP_MOVE_I | DCMD_BMI_IO)
- << 24) | count);
- cmd_datain[3] = le32_to_cpu(buf);
-#if 0
- print_insn (host, cmd_datain, "dynamic ", 1);
- print_insn (host, cmd_datain + 2, "dynamic ", 1);
-#endif
- }
- if (dataout) {
- /* CALL other_out, WHEN NOT DATA_OUT */
- cmd_dataout[0] = le32_to_cpu(((DCMD_TYPE_TCI | DCMD_TCI_OP_CALL) << 24) |
- DBC_TCI_WAIT_FOR_VALID | DBC_TCI_COMPARE_PHASE);
- cmd_dataout[1] = le32_to_cpu(virt_to_bus(hostdata->script) +
- hostdata->E_other_out);
- /* MOVE count, buf, WHEN DATA+OUT */
- cmd_dataout[2] = le32_to_cpu(((DCMD_TYPE_BMI | DCMD_BMI_OP_MOVE_I) << 24)
- | count);
- cmd_dataout[3] = le32_to_cpu(buf);
-#if 0
- print_insn (host, cmd_dataout, "dynamic ", 1);
- print_insn (host, cmd_dataout + 2, "dynamic ", 1);
-#endif
- }
- }
-
- /*
- * Install JUMP instructions after the data transfer routines to return
- * control to the do_other_transfer routines.
- */
-
-
- if (datain) {
- cmd_datain[0] = le32_to_cpu(((DCMD_TYPE_TCI | DCMD_TCI_OP_JUMP) << 24) |
- DBC_TCI_TRUE);
- cmd_datain[1] = le32_to_cpu(virt_to_bus(hostdata->script) +
- hostdata->E_other_transfer);
-#if 0
- print_insn (host, cmd_datain, "dynamic jump ", 1);
-#endif
- cmd_datain += 2;
- }
-#if 0
- if (datain) {
- cmd_datain[0] = 0x98080000;
- cmd_datain[1] = 0x03ffdeed;
- cmd_datain += 2;
- }
-#endif
- if (dataout) {
- cmd_dataout[0] = le32_to_cpu(((DCMD_TYPE_TCI | DCMD_TCI_OP_JUMP) << 24) |
- DBC_TCI_TRUE);
- cmd_dataout[1] = le32_to_cpu(virt_to_bus(hostdata->script) +
- hostdata->E_other_transfer);
-#if 0
- print_insn (host, cmd_dataout, "dynamic jump ", 1);
-#endif
- cmd_dataout += 2;
- }
- return tmp;
-}
-
-/*
- * Function : int NCR53c7xx_queue_command (Scsi_Cmnd *cmd,
- * void (*done)(Scsi_Cmnd *))
- *
- * Purpose : enqueues a SCSI command
- *
- * Inputs : cmd - SCSI command, done - function called on completion, with
- * a pointer to the command descriptor.
- *
- * Returns : 0
- *
- * Side effects :
- * cmd is added to the per instance driver issue_queue, with major
- * twiddling done to the host specific fields of cmd. If the
- * process_issue_queue coroutine isn't running, it is restarted.
- *
- * NOTE : we use the host_scribble field of the Scsi_Cmnd structure to
- * hold our own data, and pervert the ptr field of the SCp field
- * to create a linked list.
- */
-
-int
-NCR53c7xx_queue_command (Scsi_Cmnd *cmd, void (* done)(Scsi_Cmnd *)) {
- struct Scsi_Host *host = cmd->device->host;
- struct NCR53c7x0_hostdata *hostdata =
- (struct NCR53c7x0_hostdata *) host->hostdata;
- unsigned long flags;
- Scsi_Cmnd *tmp;
-
- cmd->scsi_done = done;
- cmd->host_scribble = NULL;
- cmd->SCp.ptr = NULL;
- cmd->SCp.buffer = NULL;
-
- save_flags(flags);
- cli();
- if ((hostdata->options & (OPTION_DEBUG_INIT_ONLY|OPTION_DEBUG_PROBE_ONLY))
- || ((hostdata->options & OPTION_DEBUG_TARGET_LIMIT) &&
- !(hostdata->debug_lun_limit[cmd->device->id] & (1 << cmd->device->lun)))
- || cmd->device->id > host->max_id
- || cmd->device->id == host->this_id
- || hostdata->state == STATE_DISABLED) {
- printk("scsi%d : disabled or bad target %d lun %d\n", host->host_no,
- cmd->device->id, cmd->device->lun);
- cmd->result = DID_BAD_TARGET << 16;
- } else if ((hostdata->options & OPTION_DEBUG_NCOMMANDS_LIMIT) &&
- (hostdata->debug_count_limit == 0)) {
- printk("scsi%d : maximum commands exceeded\n", host->host_no);
- cmd->result = DID_BAD_TARGET << 16;
- } else if (hostdata->options & OPTION_DEBUG_READ_ONLY) {
- switch (cmd->cmnd[0]) {
- case WRITE_6:
- case WRITE_10:
- printk("scsi%d : WRITE attempted with NO_WRITE debugging flag set\n",
- host->host_no);
- cmd->result = DID_BAD_TARGET << 16;
- }
- } else {
- if ((hostdata->options & OPTION_DEBUG_TARGET_LIMIT) &&
- hostdata->debug_count_limit != -1)
- --hostdata->debug_count_limit;
- restore_flags (flags);
- cmd->result = le32_to_cpu(0xffff); /* The NCR will overwrite message
- and status with valid data */
- cmd->host_scribble = (unsigned char *) tmp = create_cmd (cmd);
- }
- cli();
- /*
- * REQUEST SENSE commands are inserted at the head of the queue
- * so that we do not clear the contingent allegiance condition
- * they may be looking at.
- */
-
- if (!(hostdata->issue_queue) || (cmd->cmnd[0] == REQUEST_SENSE)) {
- cmd->SCp.ptr = (unsigned char *) hostdata->issue_queue;
- hostdata->issue_queue = cmd;
- } else {
- for (tmp = (Scsi_Cmnd *) hostdata->issue_queue; tmp->SCp.ptr;
- tmp = (Scsi_Cmnd *) tmp->SCp.ptr);
- tmp->SCp.ptr = (unsigned char *) cmd;
- }
- restore_flags (flags);
- run_process_issue_queue();
- return 0;
-}
-
-/*
- * Function : void to_schedule_list (struct Scsi_Host *host,
- * struct NCR53c7x0_hostdata * hostdata, Scsi_Cmnd *cmd)
- *
- * Purpose : takes a SCSI command which was just removed from the
- * issue queue, and deals with it by inserting it in the first
- * free slot in the schedule list or by terminating it immediately.
- *
- * Inputs :
- * host - SCSI host adapter; hostdata - hostdata structure for
- * this adapter; cmd - a pointer to the command; should have
- * the host_scribble field initialized to point to a valid
- *
- * Side effects :
- * cmd is added to the per instance schedule list, with minor
- * twiddling done to the host specific fields of cmd.
- *
- */
-
-static __inline__ void
-to_schedule_list (struct Scsi_Host *host, struct NCR53c7x0_hostdata *hostdata,
- struct NCR53c7x0_cmd *cmd) {
- NCR53c7x0_local_declare();
- Scsi_Cmnd *tmp = cmd->cmd;
- unsigned long flags;
- /* dsa start is negative, so subtraction is used */
- volatile u32 *curr;
-
- int i;
- NCR53c7x0_local_setup(host);
-#if 0
- printk("scsi%d : new dsa is 0x%lx (virt 0x%p)\n", host->host_no,
- virt_to_bus(dsa), dsa);
-#endif
-
- save_flags(flags);
- cli();
-
- /*
- * Work around race condition : if an interrupt fired and we
- * got disabled forget about this command.
- */
-
- if (hostdata->state == STATE_DISABLED) {
- printk("scsi%d : driver disabled\n", host->host_no);
- tmp->result = DID_BAD_TARGET << 16;
- cmd->next = (struct NCR53c7x0_cmd *) hostdata->free;
- hostdata->free = cmd;
- tmp->scsi_done(tmp);
- restore_flags (flags);
- return;
- }
-
- for (i = host->can_queue, curr = hostdata->schedule;
- i > 0 && curr[0] != hostdata->NOP_insn;
- --i, curr += 2 /* JUMP instructions are two words */);
-
- if (i > 0) {
- ++hostdata->busy[tmp->device->id][tmp->device->lun];
- cmd->next = hostdata->running_list;
- hostdata->running_list = cmd;
-
- /* Restore this instruction to a NOP once the command starts */
- cmd->dsa [(hostdata->dsa_jump_dest - hostdata->dsa_start) /
- sizeof(u32)] = (u32) le32_to_cpu(virt_to_bus ((void *)curr));
- /* Replace the current jump operand. */
- curr[1] =
- le32_to_cpu(virt_to_bus ((void *) cmd->dsa) + hostdata->E_dsa_code_begin -
- hostdata->E_dsa_code_template);
- /* Replace the NOP instruction with a JUMP */
- curr[0] = le32_to_cpu(((DCMD_TYPE_TCI|DCMD_TCI_OP_JUMP) << 24) |
- DBC_TCI_TRUE);
- } else {
- printk ("scsi%d: no free slot\n", host->host_no);
- disable(host);
- tmp->result = DID_ERROR << 16;
- cmd->next = (struct NCR53c7x0_cmd *) hostdata->free;
- hostdata->free = cmd;
- tmp->scsi_done(tmp);
- restore_flags (flags);
- return;
- }
-
- /*
- * If the NCR chip is in an idle state, start it running the scheduler
- * immediately. Otherwise, signal the chip to jump to schedule as
- * soon as it is idle.
- */
- if (hostdata->idle) {
- hostdata->idle = 0;
- hostdata->state = STATE_RUNNING;
- NCR53c7x0_write32 (DSP_REG, virt_to_bus ((void *)hostdata->schedule));
- } else {
- NCR53c7x0_write8(hostdata->istat, ISTAT_10_SIGP);
- }
-
- restore_flags(flags);
-}
-
-/*
- * Function : busyp (struct Scsi_Host *host, struct NCR53c7x0_hostdata
- * *hostdata, Scsi_Cmnd *cmd)
- *
- * Purpose : decide if we can pass the given SCSI command on to the
- * device in question or not.
- *
- * Returns : non-zero when we're busy, 0 when we aren't.
- */
-
-static __inline__ int
-busyp (struct Scsi_Host *host, struct NCR53c7x0_hostdata *hostdata,
- Scsi_Cmnd *cmd) {
- /* FIXME : in the future, this needs to accommodate SCSI-II tagged
- queuing, and we may be able to play with fairness here a bit.
- */
- return hostdata->busy[cmd->device->id][cmd->device->lun];
-}
-
-/*
- * Function : process_issue_queue (void)
- *
- * Purpose : transfer commands from the issue queue to NCR start queue
- * of each NCR53c7/8xx in the system, avoiding kernel stack
- * overflows when the scsi_done() function is invoked recursively.
- *
- * NOTE : process_issue_queue exits with interrupts *disabled*, so the
- * caller must reenable them if it desires.
- *
- * NOTE : process_issue_queue should be called from both
- * NCR53c7x0_queue_command() and from the interrupt handler
- * after command completion in case NCR53c7x0_queue_command()
- * isn't invoked again but we've freed up resources that are
- * needed.
- */
-
-static void
-process_issue_queue (unsigned long flags) {
- Scsi_Cmnd *tmp, *prev;
- struct Scsi_Host *host;
- struct NCR53c7x0_hostdata *hostdata;
- int done;
-
- /*
- * We run (with interrupts disabled) until we're sure that none of
- * the host adapters have anything that can be done, at which point
- * we set process_issue_queue_running to 0 and exit.
- *
- * Interrupts are enabled before doing various other internal
- * instructions, after we've decided that we need to run through
- * the loop again.
- *
- */
-
- do {
- cli(); /* Freeze request queues */
- done = 1;
- for (host = first_host; host && host->hostt == the_template;
- host = host->next) {
- hostdata = (struct NCR53c7x0_hostdata *) host->hostdata;
- cli();
- if (hostdata->issue_queue) {
- if (hostdata->state == STATE_DISABLED) {
- tmp = (Scsi_Cmnd *) hostdata->issue_queue;
- hostdata->issue_queue = (Scsi_Cmnd *) tmp->SCp.ptr;
- tmp->result = DID_BAD_TARGET << 16;
- if (tmp->host_scribble) {
- ((struct NCR53c7x0_cmd *)tmp->host_scribble)->next =
- hostdata->free;
- hostdata->free =
- (struct NCR53c7x0_cmd *)tmp->host_scribble;
- tmp->host_scribble = NULL;
- }
- tmp->scsi_done (tmp);
- done = 0;
- } else
- for (tmp = (Scsi_Cmnd *) hostdata->issue_queue,
- prev = NULL; tmp; prev = tmp, tmp = (Scsi_Cmnd *)
- tmp->SCp.ptr)
- if (!tmp->host_scribble ||
- !busyp (host, hostdata, tmp)) {
- if (prev)
- prev->SCp.ptr = tmp->SCp.ptr;
- else
- hostdata->issue_queue = (Scsi_Cmnd *)
- tmp->SCp.ptr;
- tmp->SCp.ptr = NULL;
- if (tmp->host_scribble) {
- if (hostdata->options & OPTION_DEBUG_QUEUES)
- printk ("scsi%d : moving command for target %d lun %d to start list\n",
- host->host_no, tmp->device->id, tmp->device->lun);
-
-
- to_schedule_list (host, hostdata,
- (struct NCR53c7x0_cmd *)
- tmp->host_scribble);
- } else {
- tmp->result = le32_to_cpu(tmp->result);
- if (((tmp->result & 0xff) == 0xff) ||
- ((tmp->result & 0xff00) == 0xff00)) {
- printk ("scsi%d : danger Will Robinson!\n",
- host->host_no);
- tmp->result = DID_ERROR << 16;
- disable (host);
- }
- tmp->scsi_done(tmp);
- }
- done = 0;
- } /* if target/lun is not busy */
- } /* if hostdata->issue_queue */
- if (!done)
- restore_flags (flags);
- } /* for host */
- } while (!done);
- process_issue_queue_running = 0;
-}
-
-/*
- * Function : static void intr_scsi (struct Scsi_Host *host,
- * struct NCR53c7x0_cmd *cmd)
- *
- * Purpose : handle all SCSI interrupts, indicated by the setting
- * of the SIP bit in the ISTAT register.
- *
- * Inputs : host, cmd - host and NCR command causing the interrupt, cmd
- * may be NULL.
- */
-
-static void
-intr_scsi (struct Scsi_Host *host, struct NCR53c7x0_cmd *cmd) {
- NCR53c7x0_local_declare();
- struct NCR53c7x0_hostdata *hostdata =
- (struct NCR53c7x0_hostdata *) host->hostdata;
- unsigned char sstat0_sist0, sist1, /* Registers */
- fatal; /* Did a fatal interrupt
- occur ? */
-
- int is_8xx_chip;
- NCR53c7x0_local_setup(host);
-
- fatal = 0;
-
- is_8xx_chip = ((unsigned) (hostdata->chip - 800)) < 100;
- if (is_8xx_chip) {
- sstat0_sist0 = NCR53c7x0_read8(SIST0_REG_800);
- udelay(1);
- sist1 = NCR53c7x0_read8(SIST1_REG_800);
- } else {
- sstat0_sist0 = NCR53c7x0_read8(SSTAT0_REG);
- sist1 = 0;
- }
-
- if (hostdata->options & OPTION_DEBUG_INTR)
- printk ("scsi%d : SIST0 0x%0x, SIST1 0x%0x\n", host->host_no,
- sstat0_sist0, sist1);
-
- /* 250ms selection timeout */
- if ((is_8xx_chip && (sist1 & SIST1_800_STO)) ||
- (!is_8xx_chip && (sstat0_sist0 & SSTAT0_700_STO))) {
- fatal = 1;
- if (hostdata->options & OPTION_DEBUG_INTR) {
- printk ("scsi%d : Selection Timeout\n", host->host_no);
- if (cmd) {
- printk("scsi%d : target %d, lun %d, command ",
- host->host_no, cmd->cmd->device->id, cmd->cmd->device->lun);
- print_command (cmd->cmd->cmnd);
- printk("scsi%d : dsp = 0x%x (virt 0x%p)\n", host->host_no,
- NCR53c7x0_read32(DSP_REG),
- bus_to_virt(NCR53c7x0_read32(DSP_REG)));
- } else {
- printk("scsi%d : no command\n", host->host_no);
- }
- }
-/*
- * XXX - question : how do we want to handle the Illegal Instruction
- * interrupt, which may occur before or after the Selection Timeout
- * interrupt?
- */
-
- if (1) {
- hostdata->idle = 1;
- hostdata->expecting_sto = 0;
-
- if (hostdata->test_running) {
- hostdata->test_running = 0;
- hostdata->test_completed = 3;
- } else if (cmd) {
- abnormal_finished(cmd, DID_BAD_TARGET << 16);
- }
-#if 0
- hostdata->intrs = 0;
-#endif
- }
- }
-
-/*
- * FIXME : in theory, we can also get a UDC when a STO occurs.
- */
- if (sstat0_sist0 & SSTAT0_UDC) {
- fatal = 1;
- if (cmd) {
- printk("scsi%d : target %d lun %d unexpected disconnect\n",
- host->host_no, cmd->cmd->device->id, cmd->cmd->device->lun);
- print_lots (host);
- abnormal_finished(cmd, DID_ERROR << 16);
- } else
- printk("scsi%d : unexpected disconnect (no command)\n",
- host->host_no);
-
- hostdata->dsp = (u32 *) hostdata->schedule;
- hostdata->dsp_changed = 1;
- }
-
- /* SCSI PARITY error */
- if (sstat0_sist0 & SSTAT0_PAR) {
- fatal = 1;
- if (cmd && cmd->cmd) {
- printk("scsi%d : target %d lun %d parity error.\n",
- host->host_no, cmd->cmd->device->id, cmd->cmd->device->lun);
- abnormal_finished (cmd, DID_PARITY << 16);
- } else
- printk("scsi%d : parity error\n", host->host_no);
- /* Should send message out, parity error */
-
- /* XXX - Reduce synchronous transfer rate! */
- hostdata->dsp = hostdata->script + hostdata->E_initiator_abort /
- sizeof(u32);
- hostdata->dsp_changed = 1;
- /* SCSI GROSS error */
- }
-
- if (sstat0_sist0 & SSTAT0_SGE) {
- fatal = 1;
- printk("scsi%d : gross error\n", host->host_no);
- /* Reset SCSI offset */
- if ((hostdata->chip / 100) == 8) {
- NCR53c7x0_write8 (STEST2_REG_800, STEST2_800_ROF);
- }
-
- /*
- * A SCSI gross error may occur when we have
- *
- * - A synchronous offset which causes the SCSI FIFO to be overwritten.
- *
- * - A REQ which causes the maximum synchronous offset programmed in
- * the SXFER register to be exceeded.
- *
- * - A phase change with an outstanding synchronous offset.
- *
- * - Residual data in the synchronous data FIFO, with a transfer
- * other than a synchronous receive is started.$#
- */
-
-
- /* XXX Should deduce synchronous transfer rate! */
- hostdata->dsp = hostdata->script + hostdata->E_initiator_abort /
- sizeof(u32);
- hostdata->dsp_changed = 1;
- /* Phase mismatch */
- }
-
- if (sstat0_sist0 & SSTAT0_MA) {
- fatal = 1;
- if (hostdata->options & OPTION_DEBUG_INTR)
- printk ("scsi%d : SSTAT0_MA\n", host->host_no);
- intr_phase_mismatch (host, cmd);
- }
-
-#if 0
- if (sstat0_sist0 & SIST0_800_RSL)
- printk ("scsi%d : Oh no Mr. Bill!\n", host->host_no);
-#endif
-
-/*
- * If a fatal SCSI interrupt occurs, we must insure that the DMA and
- * SCSI FIFOs were flushed.
- */
-
- if (fatal) {
- if (!hostdata->dstat_valid) {
- hostdata->dstat = NCR53c7x0_read8(DSTAT_REG);
- hostdata->dstat_valid = 1;
- }
-
-/* XXX - code check for 700/800 chips */
- if (!(hostdata->dstat & DSTAT_DFE)) {
- printk ("scsi%d : DMA FIFO not empty\n", host->host_no);
- if (NCR53c7x0_read8 (CTEST2_REG_800) & CTEST2_800_DDIR) {
- printk ("scsi%d: Flushing DMA FIFO\n",
- host->host_no);
- NCR53c7x0_write8 (CTEST3_REG_800, CTEST3_800_FLF);
- while (!((hostdata->dstat = NCR53c7x0_read8(DSTAT_REG)) &
- DSTAT_DFE));
- } else {
- NCR53c7x0_write8 (CTEST3_REG_800, CTEST3_800_CLF);
- while (NCR53c7x0_read8 (CTEST3_REG_800) & CTEST3_800_CLF);
- }
- hostdata->dstat |= DSTAT_DFE;
- }
- }
-}
-
-/*
- * Function : do_NCR53c7x0_intr()
- *
- * Purpose : A quick wrapper function added to grab the io_request_lock
- * spin lock prior to entering the real interrupt handler. Needed
- * for 2.1.95 and above.
- */
-static void
-do_NCR53c7x0_intr(int irq, void *dev_id, struct pt_regs * regs) {
- unsigned long flags;
-
- struct Scsi_Host *dev = dev_id;
-
- spin_lock_irqsave(dev->host_lock, flags);
- NCR53c7x0_intr(irq, dev_id, regs);
- spin_unlock_irqrestore(dev->host_lock, flags);
-}
-
-/*
- * Function : static void NCR53c7x0_intr (int irq, void *dev_id, struct pt_regs * regs)
- *
- * Purpose : handle NCR53c7x0 interrupts for all NCR devices sharing
- * the same IRQ line.
- *
- * Inputs : Since we're using the SA_INTERRUPT interrupt handler
- * semantics, irq indicates the interrupt which invoked
- * this handler.
- */
-
-static void
-NCR53c7x0_intr (int irq, void *dev_id, struct pt_regs * regs) {
- NCR53c7x0_local_declare();
- struct Scsi_Host *host; /* Host we are looking at */
- unsigned char istat; /* Values of interrupt regs */
- struct NCR53c7x0_hostdata *hostdata; /* host->hostdata */
- struct NCR53c7x0_cmd *cmd, /* command which halted */
- **cmd_prev_ptr;
- u32 *dsa; /* DSA */
- int done = 1; /* Indicates when handler
- should terminate */
- int interrupted = 0; /* This HA generated
- an interrupt */
- int have_intfly; /* Don't print warning
- messages when we stack
- INTFLYs */
- unsigned long flags;
-
-#ifdef NCR_DEBUG
- char buf[80]; /* Debugging sprintf buffer */
- size_t buflen; /* Length of same */
-#endif
- do {
- done = 1;
- for (host = first_host; host; host = host->next)
- if (host->hostt == the_template && host->irq == irq) {
- NCR53c7x0_local_setup(host);
-
- hostdata = (struct NCR53c7x0_hostdata *) host->hostdata;
- hostdata->dsp_changed = 0;
- interrupted = 0;
- have_intfly = 0;
-
- do {
- int is_8xx_chip;
-
- hostdata->dstat_valid = 0;
- interrupted = 0;
- /*
- * Only read istat once, since reading it again will unstack
- * interrupts?
- */
- istat = NCR53c7x0_read8(hostdata->istat);
-
- /*
- * INTFLY interrupts are used by the NCR53c720, NCR53c810,
- * and NCR53c820 to signify completion of a command. Since
- * the SCSI processor continues running, we can't just look
- * at the contents of the DSA register and continue running.
- */
-/* XXX - this is too big, offends my sense of aesthetics, and should
- move to intr_intfly() */
- is_8xx_chip = ((unsigned) (hostdata->chip - 800)) < 100;
- if ((hostdata->options & OPTION_INTFLY) &&
- (is_8xx_chip && (istat & ISTAT_800_INTF))) {
- char search_found = 0; /* Got at least one ? */
- done = 0;
- interrupted = 1;
-
- /*
- * Clear the INTF bit by writing a one.
- * This reset operation is self-clearing.
- */
- NCR53c7x0_write8(hostdata->istat, istat|ISTAT_800_INTF);
-
- if (hostdata->options & OPTION_DEBUG_INTR)
- printk ("scsi%d : INTFLY\n", host->host_no);
-
- /*
- * Traverse our list of running commands, and look
- * for those with valid (non-0xff ff) status and message
- * bytes encoded in the result which signify command
- * completion.
- */
-
-
- save_flags(flags);
- cli();
-restart:
- for (cmd_prev_ptr = (struct NCR53c7x0_cmd **)
- &(hostdata->running_list), cmd =
- (struct NCR53c7x0_cmd *) hostdata->running_list; cmd ;
- cmd_prev_ptr = (struct NCR53c7x0_cmd **) &(cmd->next),
- cmd = (struct NCR53c7x0_cmd *) cmd->next) {
- Scsi_Cmnd *tmp;
-
- if (!cmd) {
- printk("scsi%d : very weird.\n", host->host_no);
- break;
- }
-
- if (!(tmp = cmd->cmd)) {
- printk("scsi%d : weird. NCR53c7x0_cmd has no Scsi_Cmnd\n",
- host->host_no);
- continue;
- }
-#if 0
- printk ("scsi%d : looking at result of 0x%x\n",
- host->host_no, cmd->cmd->result);
-#endif
-
-#ifdef __powerpc__
- if (tmp->result == le32_to_cpu(0xffff))
- continue;
- tmp->result = le32_to_cpu(tmp->result);
-#else
- if (((tmp->result & 0xff) == 0xff) ||
- ((tmp->result & 0xff00) == 0xff00))
- continue;
-#endif
-
- search_found = 1;
-
- /* Important - remove from list _before_ done is called */
- if (cmd_prev_ptr)
- *cmd_prev_ptr = (struct NCR53c7x0_cmd *) cmd->next;
-
- --hostdata->busy[tmp->device->id][tmp->device->lun];
- cmd->next = hostdata->free;
- hostdata->free = cmd;
-
- tmp->host_scribble = NULL;
-
- if (hostdata->options & OPTION_DEBUG_INTR) {
- printk ("scsi%d : command complete : pid %lu, id %d,lun %d result 0x%x ",
- host->host_no, tmp->pid, tmp->device->id, tmp->device->lun, tmp->result);
- print_command (tmp->cmnd);
- }
-
-#if 0
- hostdata->options &= ~OPTION_DEBUG_INTR;
-#endif
- tmp->scsi_done(tmp);
- goto restart;
-
- }
- restore_flags(flags);
-
- /*
- * I think that we're stacking INTFLY interrupts; taking care of
- * all the finished commands on the first one, and then getting
- * worried when we see the next one. The magic with have_intfly
- * should tell if this is the case..
- */
-
- if (!search_found && !have_intfly) {
- printk ("scsi%d : WARNING : INTFLY with no completed commands.\n",
- host->host_no);
- } else if (!have_intfly) {
- have_intfly = 1;
- run_process_issue_queue();
- }
- }
-
- if (istat & (ISTAT_SIP|ISTAT_DIP)) {
- done = 0;
- interrupted = 1;
- hostdata->state = STATE_HALTED;
-
- if (NCR53c7x0_read8 ((hostdata->chip / 100) == 8 ?
- SSTAT1_REG : SSTAT2_REG) & SSTAT2_FF_MASK)
- printk ("scsi%d : SCSI FIFO not empty\n",
- host->host_no);
-
- /*
- * NCR53c700 and NCR53c700-66 change the current SCSI
- * process, hostdata->curr, in the Linux driver so
- * cmd = hostdata->curr.
- *
- * With other chips, we must look through the commands
- * executing and find the command structure which
- * corresponds to the DSA register.
- */
-
- if (hostdata->options & OPTION_700) {
- cmd = (struct NCR53c7x0_cmd *) hostdata->curr;
- } else {
- dsa = bus_to_virt(NCR53c7x0_read32(DSA_REG));
- for (cmd = (struct NCR53c7x0_cmd *)
- hostdata->running_list; cmd &&
- (dsa + (hostdata->dsa_start / sizeof(u32))) !=
- cmd->dsa;
- cmd = (struct NCR53c7x0_cmd *)(cmd->next));
- }
- if (hostdata->options & OPTION_DEBUG_INTR) {
- if (cmd) {
- printk("scsi%d : interrupt for pid %lu, id %d, lun %d ",
- host->host_no, cmd->cmd->pid, (int) cmd->cmd->device->id,
- (int) cmd->cmd->device->lun);
- print_command (cmd->cmd->cmnd);
- } else {
- printk("scsi%d : no active command\n", host->host_no);
- }
- }
- if (istat & ISTAT_SIP) {
- if (hostdata->options & OPTION_DEBUG_INTR)
- printk ("scsi%d : ISTAT_SIP\n", host->host_no);
- intr_scsi (host, cmd);
- }
-
- if (istat & ISTAT_DIP) {
- if (hostdata->options & OPTION_DEBUG_INTR)
- printk ("scsi%d : ISTAT_DIP\n", host->host_no);
- intr_dma (host, cmd);
- }
-
- if (!hostdata->dstat_valid) {
- hostdata->dstat = NCR53c7x0_read8(DSTAT_REG);
- hostdata->dstat_valid = 1;
- }
-
- /* XXX - code check for 700/800 chips */
- if (!(hostdata->dstat & DSTAT_DFE)) {
- printk ("scsi%d : DMA FIFO not empty\n", host->host_no);
- if (NCR53c7x0_read8 (CTEST2_REG_800) & CTEST2_800_DDIR) {
- printk ("scsi%d: Flushing DMA FIFO\n",
- host->host_no);
- NCR53c7x0_write8 (CTEST3_REG_800, CTEST3_800_FLF);
- while (!((hostdata->dstat = NCR53c7x0_read8(DSTAT_REG)) &
- DSTAT_DFE));
- } else
- {
- NCR53c7x0_write8 (CTEST3_REG_800, CTEST3_800_CLF);
- while (NCR53c7x0_read8 (CTEST3_REG_800) & CTEST3_800_CLF);
- }
- hostdata->dstat |= DSTAT_DFE;
- }
- }
- } while (interrupted);
-
-
-
- if (hostdata->intrs != -1)
- hostdata->intrs++;
-#if 0
- if (hostdata->intrs > 40) {
- printk("scsi%d : too many interrupts, halting", host->host_no);
- disable(host);
- }
-#endif
-
- if (!hostdata->idle && hostdata->state == STATE_HALTED) {
- if (!hostdata->dsp_changed) {
- hostdata->dsp = (u32 *)
- bus_to_virt(NCR53c7x0_read32(DSP_REG));
- }
-
-#if 0
- printk("scsi%d : new dsp is 0x%lx (virt 0x%p)\n",
- host->host_no, virt_to_bus(hostdata->dsp), hostdata->dsp);
-#endif
-
- hostdata->state = STATE_RUNNING;
- NCR53c7x0_write32 (DSP_REG, virt_to_bus(hostdata->dsp));
- }
- }
- } while (!done);
-}
-
-
-/*
- * Function : static int abort_connected (struct Scsi_Host *host)
- *
- * Purpose : Assuming that the NCR SCSI processor is currently
- * halted, break the currently established nexus. Clean
- * up of the NCR53c7x0_cmd and Scsi_Cmnd structures should
- * be done on receipt of the abort interrupt.
- *
- * Inputs : host - SCSI host
- *
- */
-
-static int
-abort_connected (struct Scsi_Host *host) {
-#ifdef NEW_ABORT
- NCR53c7x0_local_declare();
-#endif
- struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
- host->hostdata;
-/* FIXME : this probably should change for production kernels; at the
- least, counter should move to a per-host structure. */
- static int counter = 5;
-#ifdef NEW_ABORT
- int sstat, phase, offset;
- u32 *script;
- NCR53c7x0_local_setup(host);
-#endif
-
- if (--counter <= 0) {
- disable(host);
- return 0;
- }
-
- printk ("scsi%d : DANGER : abort_connected() called \n",
- host->host_no);
-
-#ifdef NEW_ABORT
-
-/*
- * New strategy : Rather than using a generic abort routine,
- * we'll specifically try to source or sink the appropriate
- * amount of data for the phase we're currently in (taking into
- * account the current synchronous offset)
- */
-
- sstat = (NCR53c8x0_read8 ((chip / 100) == 8 ? SSTAT1_REG : SSTAT2_REG);
- offset = OFFSET (sstat & SSTAT2_FF_MASK) >> SSTAT2_FF_SHIFT;
- phase = sstat & SSTAT2_PHASE_MASK;
-
-/*
- * SET ATN
- * MOVE source_or_sink, WHEN CURRENT PHASE
- * < repeat for each outstanding byte >
- * JUMP send_abort_message
- */
-
- script = hostdata->abort_script = kmalloc (
- 8 /* instruction size */ * (
- 1 /* set ATN */ +
- (!offset ? 1 : offset) /* One transfer per outstanding byte */ +
- 1 /* send abort message */),
- GFP_ATOMIC);
-
-
-#else /* def NEW_ABORT */
- hostdata->dsp = hostdata->script + hostdata->E_initiator_abort /
- sizeof(u32);
-#endif /* def NEW_ABORT */
- hostdata->dsp_changed = 1;
-
-/* XXX - need to flag the command as aborted after the abort_connected
- code runs
- */
- return 0;
-}
-
-/*
- * Function : static int datapath_residual (Scsi_Host *host)
- *
- * Purpose : return residual data count of what's in the chip.
- *
- * Inputs : host - SCSI host
- */
-
-static int
-datapath_residual (struct Scsi_Host *host) {
- NCR53c7x0_local_declare();
- struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
- host->hostdata;
- int count, synchronous, sstat;
- NCR53c7x0_local_setup(host);
- /* COMPAT : the 700 and 700-66 need to use DFIFO_00_BO_MASK */
- count = ((NCR53c7x0_read8 (DFIFO_REG) & DFIFO_10_BO_MASK) -
- (NCR53c7x0_read32 (DBC_REG) & DFIFO_10_BO_MASK)) & DFIFO_10_BO_MASK;
- synchronous = NCR53c7x0_read8 (SXFER_REG) & SXFER_MO_MASK;
- /* COMPAT : DDIR is elsewhere on non-'8xx chips. */
- if (NCR53c7x0_read8 (CTEST2_REG_800) & CTEST2_800_DDIR) {
- /* Receive */
- if (synchronous)
- count += (NCR53c7x0_read8 ((hostdata->chip / 100) == 8 ?
- SSTAT1_REG : SSTAT2_REG) & SSTAT2_FF_MASK) >> SSTAT2_FF_SHIFT;
- else
- if (NCR53c7x0_read8 ((hostdata->chip / 100) == 8 ?
- SSTAT0_REG : SSTAT1_REG) & SSTAT1_ILF)
- ++count;
- } else {
- /* Send */
- sstat = ((hostdata->chip / 100) == 8) ? NCR53c7x0_read8 (SSTAT0_REG) :
- NCR53c7x0_read8 (SSTAT1_REG);
- if (sstat & SSTAT1_OLF)
- ++count;
- if (synchronous && (sstat & SSTAT1_ORF))
- ++count;
- }
- return count;
-}
-
-/*
- * Function : static const char * sbcl_to_phase (int sbcl)_
- *
- * Purpose : Convert SBCL register to user-parsable phase representation
- *
- * Inputs : sbcl - value of sbcl register
- */
-
-
-static const char *
-sbcl_to_phase (int sbcl) {
- switch (sbcl & SBCL_PHASE_MASK) {
- case SBCL_PHASE_DATAIN:
- return "DATAIN";
- case SBCL_PHASE_DATAOUT:
- return "DATAOUT";
- case SBCL_PHASE_MSGIN:
- return "MSGIN";
- case SBCL_PHASE_MSGOUT:
- return "MSGOUT";
- case SBCL_PHASE_CMDOUT:
- return "CMDOUT";
- case SBCL_PHASE_STATIN:
- return "STATUSIN";
- default:
- return "unknown";
- }
-}
-
-/*
- * Function : static const char * sstat2_to_phase (int sstat)_
- *
- * Purpose : Convert SSTAT2 register to user-parsable phase representation
- *
- * Inputs : sstat - value of sstat register
- */
-
-
-static const char *
-sstat2_to_phase (int sstat) {
- switch (sstat & SSTAT2_PHASE_MASK) {
- case SSTAT2_PHASE_DATAIN:
- return "DATAIN";
- case SSTAT2_PHASE_DATAOUT:
- return "DATAOUT";
- case SSTAT2_PHASE_MSGIN:
- return "MSGIN";
- case SSTAT2_PHASE_MSGOUT:
- return "MSGOUT";
- case SSTAT2_PHASE_CMDOUT:
- return "CMDOUT";
- case SSTAT2_PHASE_STATIN:
- return "STATUSIN";
- default:
- return "unknown";
- }
-}
-
-/*
- * Function : static void intr_phase_mismatch (struct Scsi_Host *host,
- * struct NCR53c7x0_cmd *cmd)
- *
- * Purpose : Handle phase mismatch interrupts
- *
- * Inputs : host, cmd - host and NCR command causing the interrupt, cmd
- * may be NULL.
- *
- * Side effects : The abort_connected() routine is called or the NCR chip
- * is restarted, jumping to the command_complete entry point, or
- * patching the address and transfer count of the current instruction
- * and calling the msg_in entry point as appropriate.
- */
-
-static void
-intr_phase_mismatch (struct Scsi_Host *host, struct NCR53c7x0_cmd *cmd) {
- NCR53c7x0_local_declare();
- u32 dbc_dcmd, *dsp, *dsp_next;
- unsigned char dcmd, sbcl;
- struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
- host->hostdata;
- int residual;
- enum {ACTION_ABORT, ACTION_ABORT_PRINT, ACTION_CONTINUE} action =
- ACTION_ABORT_PRINT;
- const char *where = NULL;
- NCR53c7x0_local_setup(host);
-
- /*
- * Corrective action is based on where in the SCSI SCRIPT(tm) the error
- * occurred, as well as which SCSI phase we are currently in.
- */
- dsp_next = bus_to_virt(NCR53c7x0_read32(DSP_REG));
-
- /*
- * Fetch the current instruction, and remove the operands for easier
- * interpretation.
- */
- dbc_dcmd = NCR53c7x0_read32(DBC_REG);
- dcmd = (dbc_dcmd & 0xff000000) >> 24;
- /*
- * Like other processors, the NCR adjusts the instruction pointer before
- * instruction decode. Set the DSP address back to what it should
- * be for this instruction based on its size (2 or 3 32 bit words).
- */
- dsp = dsp_next - NCR53c7x0_insn_size(dcmd);
-
-
- /*
- * Read new SCSI phase from the SBCL lines. Since all of our code uses
- * a WHEN conditional instead of an IF conditional, we don't need to
- * wait for a new REQ.
- */
- sbcl = NCR53c7x0_read8(SBCL_REG) & SBCL_PHASE_MASK;
-
- if (!cmd) {
- action = ACTION_ABORT_PRINT;
- where = "no current command";
- /*
- * The way my SCSI SCRIPTS(tm) are architected, recoverable phase
- * mismatches should only occur where we're doing a multi-byte
- * BMI instruction. Specifically, this means
- *
- * - select messages (a SCSI-I target may ignore additional messages
- * after the IDENTIFY; any target may reject a SDTR or WDTR)
- *
- * - command out (targets may send a message to signal an error
- * condition, or go into STATUSIN after they've decided
- * they don't like the command.
- *
- * - reply_message (targets may reject a multi-byte message in the
- * middle)
- *
- * - data transfer routines (command completion with buffer space
- * left, disconnect message, or error message)
- */
- } else if (((dsp >= cmd->data_transfer_start &&
- dsp < cmd->data_transfer_end)) || dsp == (cmd->residual + 2)) {
- if ((dcmd & (DCMD_TYPE_MASK|DCMD_BMI_OP_MASK|DCMD_BMI_INDIRECT|
- DCMD_BMI_MSG|DCMD_BMI_CD)) == (DCMD_TYPE_BMI|
- DCMD_BMI_OP_MOVE_I)) {
- residual = datapath_residual (host);
- if (hostdata->options & OPTION_DEBUG_DISCONNECT)
- printk ("scsi%d : handling residual transfer (+ %d bytes from DMA FIFO)\n",
- host->host_no, residual);
-
- /*
- * The first instruction is a CALL to the alternate handler for
- * this data transfer phase, so we can do calls to
- * munge_msg_restart as we would if control were passed
- * from normal dynamic code.
- */
- if (dsp != cmd->residual + 2) {
- cmd->residual[0] = le32_to_cpu(((DCMD_TYPE_TCI | DCMD_TCI_OP_CALL |
- ((dcmd & DCMD_BMI_IO) ? DCMD_TCI_IO : 0)) << 24) |
- DBC_TCI_WAIT_FOR_VALID | DBC_TCI_COMPARE_PHASE);
- cmd->residual[1] = le32_to_cpu(virt_to_bus(hostdata->script)
- + ((dcmd & DCMD_BMI_IO)
- ? hostdata->E_other_in : hostdata->E_other_out));
- }
-
- /*
- * The second instruction is the a data transfer block
- * move instruction, reflecting the pointer and count at the
- * time of the phase mismatch.
- */
- cmd->residual[2] = le32_to_cpu(dbc_dcmd + residual);
- cmd->residual[3] = le32_to_cpu(NCR53c7x0_read32(DNAD_REG) - residual);
-
- /*
- * The third and final instruction is a jump to the instruction
- * which follows the instruction which had to be 'split'
- */
- if (dsp != cmd->residual + 2) {
- cmd->residual[4] = le32_to_cpu(((DCMD_TYPE_TCI|DCMD_TCI_OP_JUMP)
- << 24) | DBC_TCI_TRUE);
- cmd->residual[5] = le32_to_cpu(virt_to_bus(dsp_next));
- }
-
- /*
- * For the sake of simplicity, transfer control to the
- * conditional CALL at the start of the residual buffer.
- */
- hostdata->dsp = cmd->residual;
- hostdata->dsp_changed = 1;
- action = ACTION_CONTINUE;
- } else {
- where = "non-BMI dynamic DSA code";
- action = ACTION_ABORT_PRINT;
- }
- } else if (dsp == (hostdata->script + hostdata->E_select_msgout / 4)) {
- /* Release ATN */
- NCR53c7x0_write8 (SOCL_REG, 0);
- switch (sbcl) {
- /*
- * Some devices (SQ555 come to mind) grab the IDENTIFY message
- * sent on selection, and decide to go into COMMAND OUT phase
- * rather than accepting the rest of the messages or rejecting
- * them. Handle these devices gracefully.
- */
- case SBCL_PHASE_CMDOUT:
- hostdata->dsp = dsp + 2 /* two _words_ */;
- hostdata->dsp_changed = 1;
- printk ("scsi%d : target %d ignored SDTR and went into COMMAND OUT\n",
- host->host_no, cmd->cmd->device->id);
- cmd->flags &= ~CMD_FLAG_SDTR;
- action = ACTION_CONTINUE;
- break;
- case SBCL_PHASE_MSGIN:
- hostdata->dsp = hostdata->script + hostdata->E_msg_in /
- sizeof(u32);
- hostdata->dsp_changed = 1;
- action = ACTION_CONTINUE;
- break;
- default:
- where="select message out";
- action = ACTION_ABORT_PRINT;
- }
- /*
- * Some SCSI devices will interpret a command as they read the bytes
- * off the SCSI bus, and may decide that the command is Bogus before
- * they've read the entire command off the bus.
- */
- } else if (dsp == hostdata->script + hostdata->E_cmdout_cmdout / sizeof
- (u32)) {
- hostdata->dsp = hostdata->script + hostdata->E_data_transfer /
- sizeof (u32);
- hostdata->dsp_changed = 1;
- action = ACTION_CONTINUE;
- /* FIXME : we need to handle message reject, etc. within msg_respond. */
-#ifdef notyet
- } else if (dsp == hostdata->script + hostdata->E_reply_message) {
- switch (sbcl) {
- /* Any other phase mismatches abort the currently executing command. */
-#endif
- } else {
- where = "unknown location";
- action = ACTION_ABORT_PRINT;
- }
-
- /* Flush DMA FIFO */
- if (!hostdata->dstat_valid) {
- hostdata->dstat = NCR53c7x0_read8(DSTAT_REG);
- hostdata->dstat_valid = 1;
- }
- if (!(hostdata->dstat & DSTAT_DFE)) {
- if (NCR53c7x0_read8 (CTEST2_REG_800) & CTEST2_800_DDIR) {
- printk ("scsi%d: Flushing DMA FIFO\n",
- host->host_no);
- NCR53c7x0_write8 (CTEST3_REG_800, CTEST3_800_FLF);
- /* FIXME : what about stacked DMA interrupts? */
- while (!((hostdata->dstat = NCR53c7x0_read8(DSTAT_REG)) &
- DSTAT_DFE));
- } else {
- NCR53c7x0_write8 (CTEST3_REG_800, CTEST3_800_CLF);
- while (NCR53c7x0_read8 (CTEST3_REG_800) & CTEST3_800_CLF);
- }
- hostdata->dstat |= DSTAT_DFE;
- }
-
- switch (action) {
- case ACTION_ABORT_PRINT:
- printk("scsi%d : %s : unexpected phase %s.\n",
- host->host_no, where ? where : "unknown location",
- sbcl_to_phase(sbcl));
- print_lots (host);
- /* Fall through to ACTION_ABORT */
- case ACTION_ABORT:
- abort_connected (host);
- break;
- case ACTION_CONTINUE:
- break;
- }
-
-#if 0
- if (hostdata->dsp_changed) {
- printk("scsi%d: new dsp 0x%p\n", host->host_no, hostdata->dsp);
- print_insn (host, hostdata->dsp, "", 1);
- }
-#endif
-
-}
-
-/*
- * Function : static void intr_bf (struct Scsi_Host *host,
- * struct NCR53c7x0_cmd *cmd)
- *
- * Purpose : handle BUS FAULT interrupts
- *
- * Inputs : host, cmd - host and NCR command causing the interrupt, cmd
- * may be NULL.
- */
-
-static void
-intr_bf (struct Scsi_Host *host, struct NCR53c7x0_cmd *cmd) {
- NCR53c7x0_local_declare();
- struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
- host->hostdata;
- u32 *dsp,
- *next_dsp, /* Current dsp */
- *dsa,
- dbc_dcmd; /* DCMD (high eight bits) + DBC */
- unsigned short pci_status;
- int tmp;
- unsigned long flags;
- char *reason = NULL;
- /* Default behavior is for a silent error, with a retry until we've
- exhausted retries. */
- enum {MAYBE, ALWAYS, NEVER} retry = MAYBE;
- int report = 0;
- NCR53c7x0_local_setup(host);
-
- dbc_dcmd = NCR53c7x0_read32 (DBC_REG);
- next_dsp = bus_to_virt (NCR53c7x0_read32(DSP_REG));
- dsp = next_dsp - NCR53c7x0_insn_size ((dbc_dcmd >> 24) & 0xff);
-/* FIXME - check chip type */
- dsa = bus_to_virt (NCR53c7x0_read32(DSA_REG));
-
- /*
- * Bus faults can be caused by either a Bad Address or
- * Target Abort. We should check the Received Target Abort
- * bit of the PCI status register and Master Abort Bit.
- *
- * - Master Abort bit indicates that no device claimed
- * the address with DEVSEL within five clocks
- *
- * - Target Abort bit indicates that a target claimed it,
- * but changed its mind once it saw the byte enables.
- *
- */
-
- if ((hostdata->chip / 100) == 8) {
- save_flags (flags);
- cli();
- tmp = pci_read_config_word (hostdata->pcidev, PCI_STATUS, &pci_status);
- restore_flags (flags);
- if (tmp == PCIBIOS_SUCCESSFUL) {
- if (pci_status & PCI_STATUS_REC_TARGET_ABORT) {
- reason = "PCI target abort";
- pci_status &= ~PCI_STATUS_REC_TARGET_ABORT;
- } else if (pci_status & PCI_STATUS_REC_MASTER_ABORT) {
- reason = "No device asserted PCI DEVSEL within five bus clocks";
- pci_status &= ~PCI_STATUS_REC_MASTER_ABORT;
- } else if (pci_status & PCI_STATUS_PARITY) {
- report = 1;
- pci_status &= ~PCI_STATUS_PARITY;
- }
- } else {
- printk ("scsi%d : couldn't read status register : error %d\n",
- host->host_no, tmp);
- retry = NEVER;
- }
- }
-
-#ifndef notyet
- report = 1;
-#endif
- if (report && reason) {
- printk(KERN_ALERT "scsi%d : BUS FAULT reason = %s\n",
- host->host_no, reason ? reason : "unknown");
- print_lots (host);
- }
-
-#ifndef notyet
- retry = NEVER;
-#endif
-
- /*
- * TODO : we should attempt to recover from any spurious bus
- * faults. After X retries, we should figure that things are
- * sufficiently wedged, and call NCR53c7xx_reset.
- *
- * This code should only get executed once we've decided that we
- * cannot retry.
- */
-
- if (retry == NEVER) {
- printk(KERN_ALERT " mail drew@PoohSticks.ORG\n");
- FATAL (host);
- }
-}
-
-/*
- * Function : static void intr_dma (struct Scsi_Host *host,
- * struct NCR53c7x0_cmd *cmd)
- *
- * Purpose : handle all DMA interrupts, indicated by the setting
- * of the DIP bit in the ISTAT register.
- *
- * Inputs : host, cmd - host and NCR command causing the interrupt, cmd
- * may be NULL.
- */
-
-static void
-intr_dma (struct Scsi_Host *host, struct NCR53c7x0_cmd *cmd) {
- NCR53c7x0_local_declare();
- struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
- host->hostdata;
- unsigned char dstat; /* DSTAT */
- u32 *dsp,
- *next_dsp, /* Current dsp */
- *dsa,
- dbc_dcmd; /* DCMD (high eight bits) + DBC */
- int tmp;
- unsigned long flags;
- NCR53c7x0_local_setup(host);
-
- if (!hostdata->dstat_valid) {
- hostdata->dstat = NCR53c7x0_read8(DSTAT_REG);
- hostdata->dstat_valid = 1;
- }
-
- dstat = hostdata->dstat;
-
- if (hostdata->options & OPTION_DEBUG_INTR)
- printk("scsi%d : DSTAT=0x%x\n", host->host_no, (int) dstat);
-
- dbc_dcmd = NCR53c7x0_read32 (DBC_REG);
- next_dsp = bus_to_virt(NCR53c7x0_read32(DSP_REG));
- dsp = next_dsp - NCR53c7x0_insn_size ((dbc_dcmd >> 24) & 0xff);
-/* XXX - check chip type */
- dsa = bus_to_virt(NCR53c7x0_read32(DSA_REG));
-
- /*
- * DSTAT_ABRT is the aborted interrupt. This is set whenever the
- * SCSI chip is aborted.
- *
- * With NCR53c700 and NCR53c700-66 style chips, we should only
- * get this when the chip is currently running the accept
- * reselect/select code and we have set the abort bit in the
- * ISTAT register.
- *
- */
-
- if (dstat & DSTAT_ABRT) {
-#if 0
- /* XXX - add code here to deal with normal abort */
- if ((hostdata->options & OPTION_700) && (hostdata->state ==
- STATE_ABORTING)) {
- } else
-#endif
- {
- printk(KERN_ALERT "scsi%d : unexpected abort interrupt at\n"
- " ", host->host_no);
- print_insn (host, dsp, KERN_ALERT "s ", 1);
- FATAL (host);
- }
- }
-
- /*
- * DSTAT_SSI is the single step interrupt. Should be generated
- * whenever we have single stepped or are tracing.
- */
-
- if (dstat & DSTAT_SSI) {
- if (hostdata->options & OPTION_DEBUG_TRACE) {
- } else if (hostdata->options & OPTION_DEBUG_SINGLE) {
- print_insn (host, dsp, "s ", 0);
- save_flags(flags);
- cli();
-/* XXX - should we do this, or can we get away with writing dsp? */
-
- NCR53c7x0_write8 (DCNTL_REG, (NCR53c7x0_read8(DCNTL_REG) &
- ~DCNTL_SSM) | DCNTL_STD);
- restore_flags(flags);
- } else {
- printk(KERN_ALERT "scsi%d : unexpected single step interrupt at\n"
- " ", host->host_no);
- print_insn (host, dsp, KERN_ALERT "", 1);
- printk(KERN_ALERT " mail drew@PoohSticks.ORG\n");
- FATAL (host);
- }
- }
-
- /*
- * DSTAT_IID / DSTAT_OPC (same bit, same meaning, only the name
- * is different) is generated whenever an illegal instruction is
- * encountered.
- *
- * XXX - we may want to emulate INTFLY here, so we can use
- * the same SCSI SCRIPT (tm) for NCR53c710 through NCR53c810
- * chips.
- */
-
- if (dstat & DSTAT_OPC) {
- /*
- * Ascertain if this IID interrupts occurred before or after a STO
- * interrupt. Since the interrupt handling code now leaves
- * DSP unmodified until _after_ all stacked interrupts have been
- * processed, reading the DSP returns the original DSP register.
- * This means that if dsp lies between the select code, and
- * message out following the selection code (where the IID interrupt
- * would have to have occurred by due to the implicit wait for REQ),
- * we have an IID interrupt resulting from a STO condition and
- * can ignore it.
- */
-
- if (((dsp >= (hostdata->script + hostdata->E_select / sizeof(u32))) &&
- (dsp <= (hostdata->script + hostdata->E_select_msgout /
- sizeof(u32) + 8))) || (hostdata->test_running == 2)) {
- if (hostdata->options & OPTION_DEBUG_INTR)
- printk ("scsi%d : ignoring DSTAT_IID for SSTAT_STO\n",
- host->host_no);
- if (hostdata->expecting_iid) {
- hostdata->expecting_iid = 0;
- hostdata->idle = 1;
- if (hostdata->test_running == 2) {
- hostdata->test_running = 0;
- hostdata->test_completed = 3;
- } else if (cmd)
- abnormal_finished (cmd, DID_BAD_TARGET << 16);
- } else {
- hostdata->expecting_sto = 1;
- }
- /*
- * We can't guarantee we'll be able to execute the WAIT DISCONNECT
- * instruction within the 3.4us of bus free and arbitration delay
- * that a target can RESELECT in and assert REQ after we've dropped
- * ACK. If this happens, we'll get an illegal instruction interrupt.
- * Doing away with the WAIT DISCONNECT instructions broke everything,
- * so instead I'll settle for moving one WAIT DISCONNECT a few
- * instructions closer to the CLEAR ACK before it to minimize the
- * chances of this happening, and handle it if it occurs anyway.
- *
- * Simply continue with what we were doing, and control should
- * be transferred to the schedule routine which will ultimately
- * pass control onto the reselection or selection (not yet)
- * code.
- */
- } else if (dbc_dcmd == 0x48000000 && (NCR53c7x0_read8 (SBCL_REG) &
- SBCL_REQ)) {
- if (!(hostdata->options & OPTION_NO_PRINT_RACE))
- {
- printk("scsi%d: REQ before WAIT DISCONNECT IID\n",
- host->host_no);
- hostdata->options |= OPTION_NO_PRINT_RACE;
- }
- } else {
- printk(KERN_ALERT "scsi%d : illegal instruction\n", host->host_no);
- print_lots (host);
- printk(KERN_ALERT " mail drew@PoohSticks.ORG with ALL\n"
- " boot messages and diagnostic output\n");
- FATAL (host);
- }
- }
-
- /*
- * DSTAT_BF are bus fault errors
- */
-
- if (dstat & DSTAT_800_BF) {
- intr_bf (host, cmd);
- }
-
-
- /*
- * DSTAT_SIR interrupts are generated by the execution of
- * the INT instruction. Since the exact values available
- * are determined entirely by the SCSI script running,
- * and are local to a particular script, a unique handler
- * is called for each script.
- */
-
- if (dstat & DSTAT_SIR) {
- if (hostdata->options & OPTION_DEBUG_INTR)
- printk ("scsi%d : DSTAT_SIR\n", host->host_no);
- switch ((tmp = hostdata->dstat_sir_intr (host, cmd))) {
- case SPECIFIC_INT_NOTHING:
- case SPECIFIC_INT_RESTART:
- break;
- case SPECIFIC_INT_ABORT:
- abort_connected(host);
- break;
- case SPECIFIC_INT_PANIC:
- printk(KERN_ALERT "scsi%d : failure at ", host->host_no);
- print_insn (host, dsp, KERN_ALERT "", 1);
- printk(KERN_ALERT " dstat_sir_intr() returned SPECIFIC_INT_PANIC\n");
- FATAL (host);
- break;
- case SPECIFIC_INT_BREAK:
- intr_break (host, cmd);
- break;
- default:
- printk(KERN_ALERT "scsi%d : failure at ", host->host_no);
- print_insn (host, dsp, KERN_ALERT "", 1);
- printk(KERN_ALERT" dstat_sir_intr() returned unknown value %d\n",
- tmp);
- FATAL (host);
- }
- }
-
- if ((hostdata->chip / 100) == 8 && (dstat & DSTAT_800_MDPE)) {
- printk(KERN_ALERT "scsi%d : Master Data Parity Error\n",
- host->host_no);
- FATAL (host);
- }
-}
-
-/*
- * Function : static int print_insn (struct Scsi_Host *host,
- * u32 *insn, int kernel)
- *
- * Purpose : print numeric representation of the instruction pointed
- * to by insn to the debugging or kernel message buffer
- * as appropriate.
- *
- * If desired, a user level program can interpret this
- * information.
- *
- * Inputs : host, insn - host, pointer to instruction, prefix -
- * string to prepend, kernel - use printk instead of debugging buffer.
- *
- * Returns : size, in u32s, of instruction printed.
- */
-
-/*
- * FIXME: should change kernel parameter so that it takes an ENUM
- * specifying severity - either KERN_ALERT or KERN_PANIC so
- * all panic messages are output with the same severity.
- */
-
-static int
-print_insn (struct Scsi_Host *host, const u32 *insn,
- const char *prefix, int kernel) {
- char buf[160], /* Temporary buffer and pointer. ICKY
- arbitrary length. */
-
-
- *tmp;
- unsigned char dcmd; /* dcmd register for *insn */
- int size;
-
- /*
- * Check to see if the instruction pointer is not bogus before
- * indirecting through it; avoiding red-zone at start of
- * memory.
- *
- * FIXME: icky magic needs to happen here on non-intel boxes which
- * don't have kernel memory mapped in like this. Might be reasonable
- * to use vverify()?
- */
-
- if (virt_to_phys((void *)insn) < PAGE_SIZE ||
- virt_to_phys((void *)(insn + 8)) > virt_to_phys(high_memory) ||
- ((((dcmd = (insn[0] >> 24) & 0xff) & DCMD_TYPE_MMI) == DCMD_TYPE_MMI) &&
- virt_to_phys((void *)(insn + 12)) > virt_to_phys(high_memory))) {
- size = 0;
- sprintf (buf, "%s%p: address out of range\n",
- prefix, insn);
- } else {
-/*
- * FIXME : (void *) cast in virt_to_bus should be unnecessary, because
- * it should take const void * as argument.
- */
- sprintf(buf, "%s0x%lx (virt 0x%p) : 0x%08x 0x%08x (virt 0x%p)",
- (prefix ? prefix : ""), virt_to_bus((void *) insn), insn,
- insn[0], insn[1], bus_to_virt (le32_to_cpu(insn[1])));
- tmp = buf + strlen(buf);
- if ((dcmd & DCMD_TYPE_MASK) == DCMD_TYPE_MMI) {
- sprintf (tmp, " 0x%08x (virt 0x%p)\n", insn[2],
- bus_to_virt(le32_to_cpu(insn[2])));
- size = 3;
- } else {
- sprintf (tmp, "\n");
- size = 2;
- }
- }
-
- if (kernel)
- printk ("%s", buf);
-#ifdef NCR_DEBUG
- else {
- size_t len = strlen(buf);
- debugger_kernel_write(host, buf, len);
- }
-#endif
- return size;
-}
-
-/*
- * Function : static const char *ncr_state (int state)
- *
- * Purpose : convert state (probably from hostdata->state) to a string
- *
- * Inputs : state
- *
- * Returns : char * representation of state, "unknown" on error.
- */
-
-#if 0
-static const char *
-ncr_state (int state) {
- switch (state) {
- case STATE_HALTED: return "halted";
- case STATE_WAITING: return "waiting";
- case STATE_RUNNING: return "running";
- case STATE_ABORTING: return "aborting";
- case STATE_DISABLED: return "disabled";
- default: return "unknown";
- }
-}
-#endif
-
-/*
- * Function : int NCR53c7xx_abort (Scsi_Cmnd *cmd)
- *
- * Purpose : Abort an errant SCSI command, doing all necessary
- * cleanup of the issue_queue, running_list, shared Linux/NCR
- * dsa issue and reconnect queues.
- *
- * Inputs : cmd - command to abort, code - entire result field
- *
- * Returns : 0 on success, -1 on failure.
- */
-
-int
-NCR53c7xx_abort (Scsi_Cmnd *cmd) {
- NCR53c7x0_local_declare();
- struct Scsi_Host *host = cmd->device->host;
- struct NCR53c7x0_hostdata *hostdata = host ? (struct NCR53c7x0_hostdata *)
- host->hostdata : NULL;
- unsigned long flags;
- unsigned long result;
- struct NCR53c7x0_cmd *curr, **prev;
- Scsi_Cmnd *me, **last;
-#if 0
- static long cache_pid = -1;
-#endif
-
-
- if (!host) {
- printk ("Bogus SCSI command pid %ld; no host structure\n",
- cmd->pid);
- return SCSI_ABORT_ERROR;
- } else if (!hostdata) {
- printk ("Bogus SCSI host %d; no hostdata\n", host->host_no);
- return SCSI_ABORT_ERROR;
- }
- NCR53c7x0_local_setup(host);
-
-/*
- * CHECK : I don't think that reading ISTAT will unstack any interrupts,
- * since we need to write the INTF bit to clear it, and SCSI/DMA
- * interrupts don't clear until we read SSTAT/SIST and DSTAT registers.
- *
- * See that this is the case.
- *
- * I suspect that several of our failures may be coming from a new fatal
- * interrupt (possibly due to a phase mismatch) happening after we've left
- * the interrupt handler, but before the PIC has had the interrupt condition
- * cleared.
- */
-
- if (NCR53c7x0_read8(hostdata->istat) &
- (ISTAT_DIP|ISTAT_SIP|
- (hostdata->chip / 100 == 8 ? ISTAT_800_INTF : 0))) {
- printk ("scsi%d : dropped interrupt for command %ld\n", host->host_no,
- cmd->pid);
- NCR53c7x0_intr (host->irq, NULL, NULL);
- return SCSI_ABORT_BUSY;
- }
-
- save_flags(flags);
- cli();
-#if 0
- if (cache_pid == cmd->pid)
- panic ("scsi%d : bloody fetus %d\n", host->host_no, cmd->pid);
- else
- cache_pid = cmd->pid;
-#endif
-
-
-/*
- * The command could be hiding in the issue_queue. This would be very
- * nice, as commands can't be moved from the high level driver's issue queue
- * into the shared queue until an interrupt routine is serviced, and this
- * moving is atomic.
- *
- * If this is the case, we don't have to worry about anything - we simply
- * pull the command out of the old queue, and call it aborted.
- */
-
- for (me = (Scsi_Cmnd *) hostdata->issue_queue,
- last = (Scsi_Cmnd **) &(hostdata->issue_queue);
- me && me != cmd; last = (Scsi_Cmnd **)&(me->SCp.ptr),
- me = (Scsi_Cmnd *)me->SCp.ptr);
-
- if (me) {
- *last = (Scsi_Cmnd *) me->SCp.ptr;
- if (me->host_scribble) {
- ((struct NCR53c7x0_cmd *)me->host_scribble)->next = hostdata->free;
- hostdata->free = (struct NCR53c7x0_cmd *) me->host_scribble;
- me->host_scribble = NULL;
- }
- cmd->result = DID_ABORT << 16;
- cmd->scsi_done(cmd);
- printk ("scsi%d : found command %ld in Linux issue queue\n",
- host->host_no, me->pid);
- restore_flags(flags);
- run_process_issue_queue();
- return SCSI_ABORT_SUCCESS;
- }
-
-/*
- * That failing, the command could be in our list of already executing
- * commands. If this is the case, drastic measures are called for.
- */
-
- for (curr = (struct NCR53c7x0_cmd *) hostdata->running_list,
- prev = (struct NCR53c7x0_cmd **) &(hostdata->running_list);
- curr && curr->cmd != cmd; prev = (struct NCR53c7x0_cmd **)
- &(curr->next), curr = (struct NCR53c7x0_cmd *) curr->next);
-
- if (curr) {
- result = le32_to_cpu(cmd->result);
- if ((result & 0xff) != 0xff && (result & 0xff00) != 0xff00) {
- if (prev)
- *prev = (struct NCR53c7x0_cmd *) curr->next;
- curr->next = (struct NCR53c7x0_cmd *) hostdata->free;
- cmd->host_scribble = NULL;
- hostdata->free = curr;
- cmd->scsi_done(cmd);
- printk ("scsi%d : found finished command %ld in running list\n",
- host->host_no, cmd->pid);
- restore_flags(flags);
- return SCSI_ABORT_NOT_RUNNING;
- } else {
- printk ("scsi%d : DANGER : command running, can not abort.\n",
- cmd->device->host->host_no);
- restore_flags(flags);
- return SCSI_ABORT_BUSY;
- }
- }
-
-/*
- * And if we couldn't find it in any of our queues, it must have been
- * a dropped interrupt.
- */
-
- curr = (struct NCR53c7x0_cmd *) cmd->host_scribble;
- if (curr) {
- curr->next = hostdata->free;
- hostdata->free = curr;
- cmd->host_scribble = NULL;
- }
-
- result = le32_to_cpu(cmd->result);
- if (((result & 0xff00) == 0xff00) ||
- ((result & 0xff) == 0xff)) {
- printk ("scsi%d : did this command ever run?\n", host->host_no);
- cmd->result = DID_ABORT << 16;
- } else {
- printk ("scsi%d : probably lost INTFLY, normal completion\n",
- host->host_no);
-/*
- * FIXME : We need to add an additional flag which indicates if a
- * command was ever counted as BUSY, so if we end up here we can
- * decrement the busy count if and only if it is necessary.
- */
- --hostdata->busy[cmd->device->id][cmd->device->lun];
- }
- restore_flags(flags);
- cmd->scsi_done(cmd);
-
-/*
- * We need to run process_issue_queue since termination of this command
- * may allow another queued command to execute first?
- */
- return SCSI_ABORT_NOT_RUNNING;
-}
-
-/*
- * Function : int NCR53c7xx_reset (Scsi_Cmnd *cmd)
- *
- * Purpose : perform a hard reset of the SCSI bus and NCR
- * chip.
- *
- * Inputs : cmd - command which caused the SCSI RESET
- *
- * Returns : 0 on success.
- */
-
-int
-NCR53c7xx_reset (Scsi_Cmnd *cmd, unsigned int reset_flags) {
- NCR53c7x0_local_declare();
- unsigned long flags;
- int found = 0;
- struct NCR53c7x0_cmd * c;
- Scsi_Cmnd *tmp;
- /*
- * When we call scsi_done(), it's going to wake up anything sleeping on the
- * resources which were in use by the aborted commands, and we'll start to
- * get new commands.
- *
- * We can't let this happen until after we've re-initialized the driver
- * structures, and can't reinitialize those structures until after we've
- * dealt with their contents.
- *
- * So, we need to find all of the commands which were running, stick
- * them on a linked list of completed commands (we'll use the host_scribble
- * pointer), do our reinitialization, and then call the done function for
- * each command.
- */
- Scsi_Cmnd *nuke_list = NULL;
- struct Scsi_Host *host = cmd->device->host;
- struct NCR53c7x0_hostdata *hostdata =
- (struct NCR53c7x0_hostdata *) host->hostdata;
-
- NCR53c7x0_local_setup(host);
- save_flags(flags);
- cli();
- ncr_halt (host);
- print_lots (host);
- dump_events (host, 30);
- ncr_scsi_reset (host);
- for (tmp = nuke_list = return_outstanding_commands (host, 1 /* free */,
- 0 /* issue */ ); tmp; tmp = (Scsi_Cmnd *) tmp->SCp.buffer)
- if (tmp == cmd) {
- found = 1;
- break;
- }
-
- /*
- * If we didn't find the command which caused this reset in our running
- * list, then we've lost it. See that it terminates normally anyway.
- */
- if (!found) {
- c = (struct NCR53c7x0_cmd *) cmd->host_scribble;
- if (c) {
- cmd->host_scribble = NULL;
- c->next = hostdata->free;
- hostdata->free = c;
- } else
- printk ("scsi%d: lost command %ld\n", host->host_no, cmd->pid);
- cmd->SCp.buffer = (struct scatterlist *) nuke_list;
- nuke_list = cmd;
- }
-
- NCR53c7x0_driver_init (host);
- hostdata->soft_reset (host);
- if (hostdata->resets == 0)
- disable(host);
- else if (hostdata->resets != -1)
- --hostdata->resets;
- restore_flags(flags);
- for (; nuke_list; nuke_list = tmp) {
- tmp = (Scsi_Cmnd *) nuke_list->SCp.buffer;
- nuke_list->result = DID_RESET << 16;
- nuke_list->scsi_done (nuke_list);
- }
- restore_flags(flags);
- return SCSI_RESET_SUCCESS;
-}
-
-/*
- * The NCR SDMS bios follows Annex A of the SCSI-CAM draft, and
- * therefore shares the scsicam_bios_param function.
- */
-
-/*
- * Function : int insn_to_offset (Scsi_Cmnd *cmd, u32 *insn)
- *
- * Purpose : convert instructions stored at NCR pointer into data
- * pointer offset.
- *
- * Inputs : cmd - SCSI command; insn - pointer to instruction. Either current
- * DSP, or saved data pointer.
- *
- * Returns : offset on success, -1 on failure.
- */
-
-
-static int
-insn_to_offset (Scsi_Cmnd *cmd, u32 *insn) {
- struct NCR53c7x0_hostdata *hostdata =
- (struct NCR53c7x0_hostdata *) cmd->device->host->hostdata;
- struct NCR53c7x0_cmd *ncmd =
- (struct NCR53c7x0_cmd *) cmd->host_scribble;
- int offset = 0, buffers;
- struct scatterlist *segment;
- char *ptr;
- int found = 0;
-
-/*
- * With the current code implementation, if the insn is inside dynamically
- * generated code, the data pointer will be the instruction preceding
- * the next transfer segment.
- */
-
- if (!check_address ((unsigned long) ncmd, sizeof (struct NCR53c7x0_cmd)) &&
- ((insn >= ncmd->data_transfer_start &&
- insn < ncmd->data_transfer_end) ||
- (insn >= ncmd->residual &&
- insn < (ncmd->residual +
- sizeof(ncmd->residual))))) {
- ptr = bus_to_virt(le32_to_cpu(insn[3]));
-
- if ((buffers = cmd->use_sg)) {
- for (offset = 0,
- segment = (struct scatterlist *) cmd->buffer;
- buffers && !((found = ((ptr >= segment->address) &&
- (ptr < (segment->address + segment->length)))));
- --buffers, offset += segment->length, ++segment)
-#if 0
- printk("scsi%d: comparing 0x%p to 0x%p\n",
- cmd->host->host_no, saved, segment->address);
-#else
- ;
-#endif
- offset += ptr - segment->address;
- } else {
- found = 1;
- offset = ptr - (char *) (cmd->request_buffer);
- }
- } else if ((insn >= hostdata->script +
- hostdata->E_data_transfer / sizeof(u32)) &&
- (insn <= hostdata->script +
- hostdata->E_end_data_transfer / sizeof(u32))) {
- found = 1;
- offset = 0;
- }
- return found ? offset : -1;
-}
-
-
-
-/*
- * Function : void print_progress (Scsi_Cmnd *cmd)
- *
- * Purpose : print the current location of the saved data pointer
- *
- * Inputs : cmd - command we are interested in
- *
- */
-
-static void
-print_progress (Scsi_Cmnd *cmd) {
- NCR53c7x0_local_declare();
- struct NCR53c7x0_cmd *ncmd =
- (struct NCR53c7x0_cmd *) cmd->host_scribble;
- int offset, i;
- char *where;
- u32 *ptr;
- NCR53c7x0_local_setup (cmd->device->host);
- for (i = 0; i < 2; ++i) {
- if (check_address ((unsigned long) ncmd,
- sizeof (struct NCR53c7x0_cmd)) == -1)
- continue;
- if (!i) {
- where = "saved";
- ptr = bus_to_virt(le32_to_cpu(ncmd->saved_data_pointer));
- } else {
- where = "active";
- ptr = bus_to_virt (NCR53c7x0_read32 (DSP_REG) -
- NCR53c7x0_insn_size (NCR53c7x0_read8 (DCMD_REG)) *
- sizeof(u32));
- }
- offset = insn_to_offset (cmd, ptr);
-
- if (offset != -1)
- printk ("scsi%d : %s data pointer at offset %d\n",
- cmd->device->host->host_no, where, offset);
- else {
- int size;
- printk ("scsi%d : can't determine %s data pointer offset\n",
- cmd->device->host->host_no, where);
- if (ncmd) {
- size = print_insn (cmd->device->host,
- bus_to_virt(le32_to_cpu(ncmd->saved_data_pointer)), "", 1);
- print_insn (cmd->device->host,
- bus_to_virt(le32_to_cpu(ncmd->saved_data_pointer)) + size * sizeof(u32),
- "", 1);
- }
- }
- }
-}
-
-
-static void
-print_dsa (struct Scsi_Host *host, u32 *dsa, const char *prefix) {
- struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
- host->hostdata;
- int i, len;
- char *ptr;
- Scsi_Cmnd *cmd;
-
- if (check_address ((unsigned long) dsa, hostdata->dsa_end -
- hostdata->dsa_start) == -1) {
- printk("scsi%d : bad dsa virt 0x%p\n", host->host_no, dsa);
- return;
- }
- printk("%sscsi%d : dsa at phys 0x%lx (virt 0x%p)\n"
- " + %d : dsa_msgout length = %u, data = 0x%x (virt 0x%p)\n" ,
- prefix ? prefix : "",
- host->host_no, virt_to_bus (dsa), dsa, hostdata->dsa_msgout,
- le32_to_cpu(dsa[hostdata->dsa_msgout / sizeof(u32)]),
- le32_to_cpu(dsa[hostdata->dsa_msgout / sizeof(u32) + 1]),
- bus_to_virt (le32_to_cpu(dsa[hostdata->dsa_msgout / sizeof(u32) + 1])));
-
- /*
- * Only print messages if they're sane in length so we don't
- * blow the kernel printk buffer on something which won't buy us
- * anything.
- */
-
- if (le32_to_cpu(dsa[hostdata->dsa_msgout / sizeof(u32)]) <
- sizeof (hostdata->free->select))
- for (i = le32_to_cpu(dsa[hostdata->dsa_msgout / sizeof(u32)]),
- ptr = bus_to_virt (le32_to_cpu(dsa[hostdata->dsa_msgout / sizeof(u32) + 1]));
- i > 0 && !check_address ((unsigned long) ptr, 1);
- ptr += len, i -= len) {
- printk(" ");
- len = print_msg (ptr);
- printk("\n");
- if (!len)
- break;
- }
-
- printk(" + %d : select_indirect = 0x%x\n",
- hostdata->dsa_select, le32_to_cpu(dsa[hostdata->dsa_select / sizeof(u32)]));
- cmd = (Scsi_Cmnd *) bus_to_virt(le32_to_cpu(dsa[hostdata->dsa_cmnd / sizeof(u32)]));
- printk(" + %d : dsa_cmnd = 0x%x ", hostdata->dsa_cmnd,
- (u32) virt_to_bus(cmd));
- if (cmd) {
- printk(" result = 0x%x, target = %d, lun = %d, cmd = ",
- cmd->result, cmd->device->id, cmd->device->lun);
- print_command(cmd->cmnd);
- } else
- printk("\n");
- printk(" + %d : dsa_next = 0x%x\n", hostdata->dsa_next,
- le32_to_cpu(dsa[hostdata->dsa_next / sizeof(u32)]));
- if (cmd) {
- printk("scsi%d target %d : sxfer_sanity = 0x%x, scntl3_sanity = 0x%x\n"
- " script : ",
- host->host_no, cmd->device->id,
- hostdata->sync[cmd->device->id].sxfer_sanity,
- hostdata->sync[cmd->device->id].scntl3_sanity);
- for (i = 0; i < (sizeof(hostdata->sync[cmd->device->id].script) / 4); ++i)
- printk ("0x%x ", hostdata->sync[cmd->device->id].script[i]);
- printk ("\n");
- print_progress (cmd);
- }
-}
-/*
- * Function : void print_queues (Scsi_Host *host)
- *
- * Purpose : print the contents of the NCR issue and reconnect queues
- *
- * Inputs : host - SCSI host we are interested in
- *
- */
-
-static void
-print_queues (struct Scsi_Host *host) {
- struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
- host->hostdata;
- u32 *dsa, *next_dsa;
- volatile u32 *curr;
- int left;
- Scsi_Cmnd *cmd, *next_cmd;
- unsigned long flags;
-
- printk ("scsi%d : issue queue\n", host->host_no);
-
- for (left = host->can_queue, cmd = (Scsi_Cmnd *) hostdata->issue_queue;
- left >= 0 && cmd;
- cmd = next_cmd) {
- next_cmd = (Scsi_Cmnd *) cmd->SCp.ptr;
- save_flags(flags);
- cli();
- if (cmd->host_scribble) {
- if (check_address ((unsigned long) (cmd->host_scribble),
- sizeof (cmd->host_scribble)) == -1)
- printk ("scsi%d: scsi pid %ld bad pointer to NCR53c7x0_cmd\n",
- host->host_no, cmd->pid);
- /* print_dsa does sanity check on address, no need to check */
- else
- print_dsa (host, bus_to_virt(le32_to_cpu(((struct NCR53c7x0_cmd *) cmd->host_scribble)-> dsa)), "");
- } else
- printk ("scsi%d : scsi pid %ld for target %d lun %d has no NCR53c7x0_cmd\n",
- host->host_no, cmd->pid, cmd->device->id, cmd->device->lun);
- restore_flags(flags);
- }
-
- if (left <= 0) {
- printk ("scsi%d : loop detected in issue queue\n",
- host->host_no);
- }
-
- /*
- * Traverse the NCR reconnect and start DSA structures, printing out
- * each element until we hit the end or detect a loop. Currently,
- * the reconnect structure is a linked list; and the start structure
- * is an array. Eventually, the reconnect structure will become a
- * list as well, since this simplifies the code.
- */
-
- printk ("scsi%d : schedule dsa array :\n", host->host_no);
- for (left = host->can_queue, curr = hostdata->schedule;
- left > 0; curr += 2, --left)
- if (curr[0] != hostdata->NOP_insn)
-/* FIXME : convert pointer to dsa_begin to pointer to dsa. */
- print_dsa (host, bus_to_virt (le32_to_cpu(curr[1]) -
- (hostdata->E_dsa_code_begin -
- hostdata->E_dsa_code_template)), "");
- printk ("scsi%d : end schedule dsa array\n", host->host_no);
-
- printk ("scsi%d : reconnect_dsa_head :\n", host->host_no);
-
- for (left = host->can_queue,
- dsa = bus_to_virt (le32_to_cpu(hostdata->reconnect_dsa_head));
- left >= 0 && dsa;
- dsa = next_dsa) {
- save_flags (flags);
- cli();
- if (check_address ((unsigned long) dsa, sizeof(dsa)) == -1) {
- printk ("scsi%d: bad DSA pointer 0x%p", host->host_no,
- dsa);
- next_dsa = NULL;
- }
- else
- {
- next_dsa = bus_to_virt(le32_to_cpu(dsa[hostdata->dsa_next / sizeof(u32)]));
- print_dsa (host, dsa, "");
- }
- restore_flags(flags);
- }
- printk ("scsi%d : end reconnect_dsa_head\n", host->host_no);
- if (left < 0)
- printk("scsi%d: possible loop in ncr reconnect list\n",
- host->host_no);
-}
-
-static void
-print_lots (struct Scsi_Host *host) {
- NCR53c7x0_local_declare();
- struct NCR53c7x0_hostdata *hostdata =
- (struct NCR53c7x0_hostdata *) host->hostdata;
- u32 *dsp_next, *dsp, *dsa, dbc_dcmd;
- unsigned char dcmd, sbcl;
- int i, size;
- NCR53c7x0_local_setup(host);
-
- if ((dsp_next = bus_to_virt(NCR53c7x0_read32 (DSP_REG)))) {
- dbc_dcmd = NCR53c7x0_read32(DBC_REG);
- dcmd = (dbc_dcmd & 0xff000000) >> 24;
- dsp = dsp_next - NCR53c7x0_insn_size(dcmd);
- dsa = bus_to_virt(NCR53c7x0_read32(DSA_REG));
- sbcl = NCR53c7x0_read8 (SBCL_REG);
-
-
- printk ("scsi%d : DCMD|DBC=0x%x, DNAD=0x%x (virt 0x%p)\n"
- " DSA=0x%lx (virt 0x%p)\n"
- " DSPS=0x%x, TEMP=0x%x (virt 0x%p), DMODE=0x%x\n"
- " SXFER=0x%x, SCNTL3=0x%x\n"
- " %s%s%sphase=%s, %d bytes in SCSI FIFO\n"
- " STEST0=0x%x\n",
- host->host_no, dbc_dcmd, NCR53c7x0_read32(DNAD_REG),
- bus_to_virt(NCR53c7x0_read32(DNAD_REG)),
- virt_to_bus(dsa), dsa,
- NCR53c7x0_read32(DSPS_REG), NCR53c7x0_read32(TEMP_REG),
- bus_to_virt (NCR53c7x0_read32(TEMP_REG)),
- (int) NCR53c7x0_read8(hostdata->dmode),
- (int) NCR53c7x0_read8(SXFER_REG),
- (int) NCR53c7x0_read8(SCNTL3_REG_800),
- (sbcl & SBCL_BSY) ? "BSY " : "",
- (sbcl & SBCL_SEL) ? "SEL " : "",
- (sbcl & SBCL_REQ) ? "REQ " : "",
- sstat2_to_phase(NCR53c7x0_read8 (((hostdata->chip / 100) == 8) ?
- SSTAT1_REG : SSTAT2_REG)),
- (NCR53c7x0_read8 ((hostdata->chip / 100) == 8 ?
- SSTAT1_REG : SSTAT2_REG) & SSTAT2_FF_MASK) >> SSTAT2_FF_SHIFT,
- NCR53c7x0_read8 (STEST0_REG_800));
- printk ("scsi%d : DSP 0x%lx (virt 0x%p) ->\n", host->host_no,
- virt_to_bus(dsp), dsp);
- for (i = 6; i > 0; --i, dsp += size)
- size = print_insn (host, dsp, "", 1);
- if (NCR53c7x0_read8 (SCNTL1_REG) & SCNTL1_CON) {
- printk ("scsi%d : connected (SDID=0x%x, SSID=0x%x)\n",
- host->host_no, NCR53c7x0_read8 (SDID_REG_800),
- NCR53c7x0_read8 (SSID_REG_800));
- print_dsa (host, dsa, "");
- }
-
-#if 1
- print_queues (host);
-#endif
- }
-}
-
-/*
- * Function : static int shutdown (struct Scsi_Host *host)
- *
- * Purpose : does a clean (we hope) shutdown of the NCR SCSI
- * chip. Use prior to dumping core, unloading the NCR driver,
- *
- * Returns : 0 on success
- */
-static int
-shutdown (struct Scsi_Host *host) {
- NCR53c7x0_local_declare();
- unsigned long flags;
- struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
- host->hostdata;
- NCR53c7x0_local_setup(host);
- save_flags (flags);
- cli();
-/* Get in a state where we can reset the SCSI bus */
- ncr_halt (host);
- ncr_scsi_reset (host);
- hostdata->soft_reset(host);
-
- disable (host);
- restore_flags (flags);
- return 0;
-}
-
-/*
- * Function : void ncr_scsi_reset (struct Scsi_Host *host)
- *
- * Purpose : reset the SCSI bus.
- */
-
-static void
-ncr_scsi_reset (struct Scsi_Host *host) {
- NCR53c7x0_local_declare();
- struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
- host->hostdata;
- unsigned long flags;
- int sien = 0;
- NCR53c7x0_local_setup(host);
- save_flags (flags);
- cli();
- if ((hostdata->chip / 100) == 8) {
- sien = NCR53c7x0_read8(SIEN0_REG_800);
- NCR53c7x0_write8(SIEN0_REG_800, sien & ~SIEN_RST);
- }
- NCR53c7x0_write8(SCNTL1_REG, SCNTL1_RST);
- udelay(25); /* Minimum amount of time to assert RST */
- NCR53c7x0_write8(SCNTL1_REG, 0);
- if ((hostdata->chip / 100) == 8) {
- NCR53c7x0_write8(SIEN0_REG_800, sien);
- }
- restore_flags (flags);
-}
-
-/*
- * Function : void hard_reset (struct Scsi_Host *host)
- *
- */
-
-static void
-hard_reset (struct Scsi_Host *host) {
- struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
- host->hostdata;
- unsigned long flags;
- save_flags (flags);
- cli();
- ncr_scsi_reset(host);
- NCR53c7x0_driver_init (host);
- if (hostdata->soft_reset)
- hostdata->soft_reset (host);
- restore_flags(flags);
-}
-
-
-/*
- * Function : Scsi_Cmnd *return_outstanding_commands (struct Scsi_Host *host,
- * int free, int issue)
- *
- * Purpose : return a linked list (using the SCp.buffer field as next,
- * so we don't perturb hostdata. We don't use a field of the
- * NCR53c7x0_cmd structure since we may not have allocated one
- * for the command causing the reset.) of Scsi_Cmnd structures that
- * had propagated below the Linux issue queue level. If free is set,
- * free the NCR53c7x0_cmd structures which are associated with
- * the Scsi_Cmnd structures, and clean up any internal
- * NCR lists that the commands were on. If issue is set,
- * also return commands in the issue queue.
- *
- * Returns : linked list of commands
- *
- * NOTE : the caller should insure that the NCR chip is halted
- * if the free flag is set.
- */
-
-static Scsi_Cmnd *
-return_outstanding_commands (struct Scsi_Host *host, int free, int issue) {
- struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
- host->hostdata;
- struct NCR53c7x0_cmd *c;
- int i;
- u32 *curr;
- Scsi_Cmnd *list = NULL, *tmp;
- for (c = (struct NCR53c7x0_cmd *) hostdata->running_list; c;
- c = (struct NCR53c7x0_cmd *) c->next) {
- if (c->cmd->SCp.buffer) {
- printk ("scsi%d : loop detected in running list!\n", host->host_no);
- break;
- } else {
- printk ("Duh? Bad things happening in the NCR driver\n");
- break;
- }
-
- c->cmd->SCp.buffer = (struct scatterlist *) list;
- list = c->cmd;
- if (free) {
- c->next = hostdata->free;
- hostdata->free = c;
- }
- }
-
- if (free) {
- for (i = 0, curr = (u32 *) hostdata->schedule;
- i < host->can_queue; ++i, curr += 2) {
- curr[0] = hostdata->NOP_insn;
- curr[1] = le32_to_cpu(0xdeadbeef);
- }
- hostdata->curr = NULL;
- }
-
- if (issue) {
- for (tmp = (Scsi_Cmnd *) hostdata->issue_queue; tmp; tmp = tmp->next) {
- if (tmp->SCp.buffer) {
- printk ("scsi%d : loop detected in issue queue!\n",
- host->host_no);
- break;
- }
- tmp->SCp.buffer = (struct scatterlist *) list;
- list = tmp;
- }
- if (free)
- hostdata->issue_queue = NULL;
-
- }
- return list;
-}
-
-/*
- * Function : static int disable (struct Scsi_Host *host)
- *
- * Purpose : disables the given NCR host, causing all commands
- * to return a driver error. Call this so we can unload the
- * module during development and try again. Eventually,
- * we should be able to find clean workarounds for these
- * problems.
- *
- * Inputs : host - hostadapter to twiddle
- *
- * Returns : 0 on success.
- */
-
-static int
-disable (struct Scsi_Host *host) {
- struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
- host->hostdata;
- unsigned long flags;
- Scsi_Cmnd *nuke_list, *tmp;
- save_flags(flags);
- cli();
- if (hostdata->state != STATE_HALTED)
- ncr_halt (host);
- nuke_list = return_outstanding_commands (host, 1 /* free */, 1 /* issue */);
- hard_reset (host);
- hostdata->state = STATE_DISABLED;
- restore_flags(flags);
- printk ("scsi%d : nuking commands\n", host->host_no);
- for (; nuke_list; nuke_list = tmp) {
- tmp = (Scsi_Cmnd *) nuke_list->SCp.buffer;
- nuke_list->result = DID_ERROR << 16;
- nuke_list->scsi_done(nuke_list);
- }
- printk ("scsi%d : done. \n", host->host_no);
- printk (KERN_ALERT "scsi%d : disabled. Unload and reload\n",
- host->host_no);
- return 0;
-}
-
-/*
- * Function : static int ncr_halt (struct Scsi_Host *host)
- *
- * Purpose : halts the SCSI SCRIPTS(tm) processor on the NCR chip
- *
- * Inputs : host - SCSI chip to halt
- *
- * Returns : 0 on success
- */
-
-static int
-ncr_halt (struct Scsi_Host *host) {
- NCR53c7x0_local_declare();
- unsigned long flags;
- unsigned char istat, tmp;
- struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
- host->hostdata;
- int stage;
- NCR53c7x0_local_setup(host);
-
- save_flags(flags);
- cli();
- /* Stage 0 : eat all interrupts
- Stage 1 : set ABORT
- Stage 2 : eat all but abort interrupts
- Stage 3 : eat all interrupts
- */
- for (stage = 0;;) {
- if (stage == 1) {
- NCR53c7x0_write8(hostdata->istat, ISTAT_ABRT);
- ++stage;
- }
- istat = NCR53c7x0_read8 (hostdata->istat);
- if (istat & ISTAT_SIP) {
- if ((hostdata->chip / 100) == 8) {
- tmp = NCR53c7x0_read8(SIST0_REG_800);
- udelay(1);
- tmp = NCR53c7x0_read8(SIST1_REG_800);
- } else {
- tmp = NCR53c7x0_read8(SSTAT0_REG);
- }
- } else if (istat & ISTAT_DIP) {
- tmp = NCR53c7x0_read8(DSTAT_REG);
- if (stage == 2) {
- if (tmp & DSTAT_ABRT) {
- NCR53c7x0_write8(hostdata->istat, 0);
- ++stage;
- } else {
- printk(KERN_ALERT "scsi%d : could not halt NCR chip\n",
- host->host_no);
- disable (host);
- }
- }
- }
- if (!(istat & (ISTAT_SIP|ISTAT_DIP))) {
- if (stage == 0)
- ++stage;
- else if (stage == 3)
- break;
- }
- }
- hostdata->state = STATE_HALTED;
- restore_flags(flags);
-#if 0
- print_lots (host);
-#endif
- return 0;
-}
-
-/*
- * Function: event_name (int event)
- *
- * Purpose: map event enum into user-readable strings.
- */
-
-static const char *
-event_name (int event) {
- switch (event) {
- case EVENT_NONE: return "none";
- case EVENT_ISSUE_QUEUE: return "to issue queue";
- case EVENT_START_QUEUE: return "to start queue";
- case EVENT_SELECT: return "selected";
- case EVENT_DISCONNECT: return "disconnected";
- case EVENT_RESELECT: return "reselected";
- case EVENT_COMPLETE: return "completed";
- case EVENT_IDLE: return "idle";
- case EVENT_SELECT_FAILED: return "select failed";
- case EVENT_BEFORE_SELECT: return "before select";
- case EVENT_RESELECT_FAILED: return "reselect failed";
- default: return "unknown";
- }
-}
-
-/*
- * Function : void dump_events (struct Scsi_Host *host, count)
- *
- * Purpose : print last count events which have occurred.
- */
-static void
-dump_events (struct Scsi_Host *host, int count) {
- struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *)
- host->hostdata;
- struct NCR53c7x0_event event;
- int i;
- unsigned long flags;
- if (hostdata->events) {
- if (count > hostdata->event_size)
- count = hostdata->event_size;
- for (i = hostdata->event_index; count > 0;
- i = (i ? i - 1 : hostdata->event_size -1), --count) {
- save_flags(flags);
-/*
- * By copying the event we're currently examining with interrupts
- * disabled, we can do multiple printk(), etc. operations and
- * still be guaranteed that they're happening on the same
- * event structure.
- */
- cli();
-#if 0
- event = hostdata->events[i];
-#else
- memcpy ((void *) &event, (void *) &(hostdata->events[i]),
- sizeof(event));
-#endif
-
- restore_flags(flags);
- printk ("scsi%d : %s event %d at %ld secs %ld usecs target %d lun %d\n",
- host->host_no, event_name (event.event), count,
- (long) event.time.tv_sec, (long) event.time.tv_usec,
- event.target, event.lun);
- if (event.dsa)
- printk (" event for dsa 0x%lx (virt 0x%p)\n",
- virt_to_bus(event.dsa), event.dsa);
- if (event.pid != -1) {
- printk (" event for pid %ld ", event.pid);
- print_command (event.cmnd);
- }
- }
- }
-}
-
-/*
- * Function: check_address
- *
- * Purpose: Check to see if a possibly corrupt pointer will fault the
- * kernel.
- *
- * Inputs: addr - address; size - size of area
- *
- * Returns: 0 if area is OK, -1 on error.
- *
- * NOTES: should be implemented in terms of vverify on kernels
- * that have it.
- */
-
-static int
-check_address (unsigned long addr, int size) {
- return (virt_to_phys((void *)addr) < PAGE_SIZE || virt_to_phys((void *)(addr + size)) > virt_to_phys(high_memory) ? -1 : 0);
-}
-
-#ifdef MODULE
-int
-NCR53c7x0_release(struct Scsi_Host *host) {
- struct NCR53c7x0_hostdata *hostdata =
- (struct NCR53c7x0_hostdata *) host->hostdata;
- struct NCR53c7x0_cmd *cmd, *tmp;
- shutdown (host);
- if (host->irq != IRQ_NONE)
- {
- int irq_count;
- struct Scsi_Host *tmp;
- for (irq_count = 0, tmp = first_host; tmp; tmp = tmp->next)
- if (tmp->hostt == the_template && tmp->irq == host->irq)
- ++irq_count;
- if (irq_count == 1)
- free_irq(host->irq, NULL);
- }
- if (host->dma_channel != DMA_NONE)
- free_dma(host->dma_channel);
- if (host->io_port)
- release_region(host->io_port, host->n_io_port);
-
- for (cmd = (struct NCR53c7x0_cmd *) hostdata->free; cmd; cmd = tmp,
- --hostdata->num_cmds) {
- tmp = (struct NCR53c7x0_cmd *) cmd->next;
- /*
- * If we're going to loop, try to stop it to get a more accurate
- * count of the leaked commands.
- */
- cmd->next = NULL;
- if (cmd->free)
- cmd->free ((void *) cmd->real, cmd->size);
- }
- if (hostdata->num_cmds)
- printk ("scsi%d : leaked %d NCR53c7x0_cmd structures\n",
- host->host_no, hostdata->num_cmds);
- if (hostdata->events)
- vfree ((void *)hostdata->events);
- return 1;
-}
-#endif /* def MODULE */
-MODULE_LICENSE("GPL");
-
-static Scsi_Host_Template driver_template = NCR53c7xx;
-#include "scsi_module.c"
+++ /dev/null
-/*
- * NCR 53c{7,8}0x0 driver, header file
- *
- * Sponsored by
- * iX Multiuser Multitasking Magazine
- * Hannover, Germany
- * hm@ix.de
- *
- * Copyright 1993, 1994, 1995 Drew Eckhardt
- * Visionary Computing
- * (Unix and Linux consulting and custom programming)
- * drew@PoohSticks.ORG
- * +1 (303) 786-7975
- *
- * TolerANT and SCSI SCRIPTS are registered trademarks of NCR Corporation.
- *
- * PRE-ALPHA
- *
- * For more information, please consult
- *
- * NCR 53C700/53C700-66
- * SCSI I/O Processor
- * Data Manual
- *
- * NCR 53C810
- * PCI-SCSI I/O Processor
- * Data Manual
- *
- * NCR Microelectronics
- * 1635 Aeroplaza Drive
- * Colorado Springs, CO 80916
- * +1 (719) 578-3400
- *
- * Toll free literature number
- * +1 (800) 334-5454
- *
- */
-
-#ifndef NCR53c7x0_H
-#define NCR53c7x0_H
-#include <linux/version.h>
-
-/*
- * Prevent name space pollution in hosts.c, and only provide the
- * define we need to get the NCR53c7x0 driver into the host template
- * array.
- */
-
-#include <scsi/scsicam.h>
-
-extern int NCR53c7xx_abort(Scsi_Cmnd *);
-extern int NCR53c7xx_detect(Scsi_Host_Template *tpnt);
-extern int NCR53c7xx_queue_command(Scsi_Cmnd *, void (*done)(Scsi_Cmnd *));
-extern int NCR53c7xx_reset(Scsi_Cmnd *, unsigned int);
-#ifdef MODULE
-extern int NCR53c7xx_release(struct Scsi_Host *);
-#else
-#define NCR53c7xx_release NULL
-#endif
-
-#define NCR53c7xx { \
- .name = "NCR53c{7,8}xx (rel 17)", \
- .detect = NCR53c7xx_detect, \
- .queuecommand = NCR53c7xx_queue_command, \
- .abort = NCR53c7xx_abort, \
- .reset = NCR53c7xx_reset, \
- .can_queue = 24, \
- .this_id = 7, \
- .sg_tablesize = 127, \
- .cmd_per_lun = 3, \
- .use_clustering = DISABLE_CLUSTERING}
-
-#ifndef HOSTS_C
-
-/* Register addresses, ordered numerically */
-
-/* SCSI control 0 rw, default = 0xc0 */
-#define SCNTL0_REG 0x00
-#define SCNTL0_ARB1 0x80 /* 0 0 = simple arbitration */
-#define SCNTL0_ARB2 0x40 /* 1 1 = full arbitration */
-#define SCNTL0_STRT 0x20 /* Start Sequence */
-#define SCNTL0_WATN 0x10 /* Select with ATN */
-#define SCNTL0_EPC 0x08 /* Enable parity checking */
-/* Bit 2 is reserved on 800 series chips */
-#define SCNTL0_EPG_700 0x04 /* Enable parity generation */
-#define SCNTL0_AAP 0x02 /* ATN/ on parity error */
-#define SCNTL0_TRG 0x01 /* Target mode */
-
-/* SCSI control 1 rw, default = 0x00 */
-
-#define SCNTL1_REG 0x01
-#define SCNTL1_EXC 0x80 /* Extra Clock Cycle of Data setup */
-#define SCNTL1_ADB 0x40 /* contents of SODL on bus */
-#define SCNTL1_ESR_700 0x20 /* Enable SIOP response to selection
- and reselection */
-#define SCNTL1_DHP_800 0x20 /* Disable halt on parity error or ATN
- target mode only */
-#define SCNTL1_CON 0x10 /* Connected */
-#define SCNTL1_RST 0x08 /* SCSI RST/ */
-#define SCNTL1_AESP 0x04 /* Force bad parity */
-#define SCNTL1_SND_700 0x02 /* Start SCSI send */
-#define SCNTL1_IARB_800 0x02 /* Immediate Arbitration, start
- arbitration immediately after
- busfree is detected */
-#define SCNTL1_RCV_700 0x01 /* Start SCSI receive */
-#define SCNTL1_SST_800 0x01 /* Start SCSI transfer */
-
-/* SCSI control 2 rw, */
-
-#define SCNTL2_REG_800 0x02
-#define SCNTL2_800_SDU 0x80 /* SCSI disconnect unexpected */
-
-/* SCSI control 3 rw */
-
-#define SCNTL3_REG_800 0x03
-#define SCNTL3_800_SCF_SHIFT 4
-#define SCNTL3_800_SCF_MASK 0x70
-#define SCNTL3_800_SCF2 0x40 /* Synchronous divisor */
-#define SCNTL3_800_SCF1 0x20 /* 0x00 = SCLK/3 */
-#define SCNTL3_800_SCF0 0x10 /* 0x10 = SCLK/1 */
- /* 0x20 = SCLK/1.5
- 0x30 = SCLK/2
- 0x40 = SCLK/3 */
-
-#define SCNTL3_800_CCF_SHIFT 0
-#define SCNTL3_800_CCF_MASK 0x07
-#define SCNTL3_800_CCF2 0x04 /* 0x00 50.01 to 66 */
-#define SCNTL3_800_CCF1 0x02 /* 0x01 16.67 to 25 */
-#define SCNTL3_800_CCF0 0x01 /* 0x02 25.01 - 37.5
- 0x03 37.51 - 50
- 0x04 50.01 - 66 */
-
-/*
- * SCSI destination ID rw - the appropriate bit is set for the selected
- * target ID. This is written by the SCSI SCRIPTS processor.
- * default = 0x00
- */
-#define SDID_REG_700 0x02
-#define SDID_REG_800 0x06
-
-#define GP_REG_800 0x07 /* General purpose IO */
-#define GP_800_IO1 0x02
-#define GP_800_IO2 0x01
-
-
-/* SCSI interrupt enable rw, default = 0x00 */
-#define SIEN_REG_700 0x03
-#define SIEN0_REG_800 0x40
-#define SIEN_MA 0x80 /* Phase mismatch (ini) or ATN (tgt) */
-#define SIEN_FC 0x40 /* Function complete */
-#define SIEN_700_STO 0x20 /* Selection or reselection timeout */
-#define SIEN_800_SEL 0x20 /* Selected */
-#define SIEN_700_SEL 0x10 /* Selected or reselected */
-#define SIEN_800_RESEL 0x10 /* Reselected */
-#define SIEN_SGE 0x08 /* SCSI gross error */
-#define SIEN_UDC 0x04 /* Unexpected disconnect */
-#define SIEN_RST 0x02 /* SCSI RST/ received */
-#define SIEN_PAR 0x01 /* Parity error */
-
-/*
- * SCSI chip ID rw
- * NCR53c700 :
- * When arbitrating, the highest bit is used, when reselection or selection
- * occurs, the chip responds to all IDs for which a bit is set.
- * default = 0x00
- * NCR53c810 :
- * Uses bit mapping
- */
-#define SCID_REG 0x04
-/* Bit 7 is reserved on 800 series chips */
-#define SCID_800_RRE 0x40 /* Enable response to reselection */
-#define SCID_800_SRE 0x20 /* Enable response to selection */
-/* Bits four and three are reserved on 800 series chips */
-#define SCID_800_ENC_MASK 0x07 /* Encoded SCSI ID */
-
-/* SCSI transfer rw, default = 0x00 */
-#define SXFER_REG 0x05
-#define SXFER_DHP 0x80 /* Disable halt on parity */
-
-#define SXFER_TP2 0x40 /* Transfer period msb */
-#define SXFER_TP1 0x20
-#define SXFER_TP0 0x10 /* lsb */
-#define SXFER_TP_MASK 0x70
-/* FIXME : SXFER_TP_SHIFT == 5 is right for '8xx chips */
-#define SXFER_TP_SHIFT 5
-#define SXFER_TP_4 0x00 /* Divisors */
-#define SXFER_TP_5 0x10<<1
-#define SXFER_TP_6 0x20<<1
-#define SXFER_TP_7 0x30<<1
-#define SXFER_TP_8 0x40<<1
-#define SXFER_TP_9 0x50<<1
-#define SXFER_TP_10 0x60<<1
-#define SXFER_TP_11 0x70<<1
-
-#define SXFER_MO3 0x08 /* Max offset msb */
-#define SXFER_MO2 0x04
-#define SXFER_MO1 0x02
-#define SXFER_MO0 0x01 /* lsb */
-#define SXFER_MO_MASK 0x0f
-#define SXFER_MO_SHIFT 0
-
-/*
- * SCSI output data latch rw
- * The contents of this register are driven onto the SCSI bus when
- * the Assert Data Bus bit of the SCNTL1 register is set and
- * the CD, IO, and MSG bits of the SOCL register match the SCSI phase
- */
-#define SODL_REG_700 0x06
-#define SODL_REG_800 0x54
-
-
-/*
- * SCSI output control latch rw, default = 0
- * Note that when the chip is being manually programmed as an initiator,
- * the MSG, CD, and IO bits must be set correctly for the phase the target
- * is driving the bus in. Otherwise no data transfer will occur due to
- * phase mismatch.
- */
-
-#define SBCL_REG 0x0b
-#define SBCL_REQ 0x80 /* REQ */
-#define SBCL_ACK 0x40 /* ACK */
-#define SBCL_BSY 0x20 /* BSY */
-#define SBCL_SEL 0x10 /* SEL */
-#define SBCL_ATN 0x08 /* ATN */
-#define SBCL_MSG 0x04 /* MSG */
-#define SBCL_CD 0x02 /* C/D */
-#define SBCL_IO 0x01 /* I/O */
-#define SBCL_PHASE_CMDOUT SBCL_CD
-#define SBCL_PHASE_DATAIN SBCL_IO
-#define SBCL_PHASE_DATAOUT 0
-#define SBCL_PHASE_MSGIN (SBCL_CD|SBCL_IO|SBCL_MSG)
-#define SBCL_PHASE_MSGOUT (SBCL_CD|SBCL_MSG)
-#define SBCL_PHASE_STATIN (SBCL_CD|SBCL_IO)
-#define SBCL_PHASE_MASK (SBCL_CD|SBCL_IO|SBCL_MSG)
-
-/*
- * SCSI first byte received latch ro
- * This register contains the first byte received during a block MOVE
- * SCSI SCRIPTS instruction, including
- *
- * Initiator mode Target mode
- * Message in Command
- * Status Message out
- * Data in Data out
- *
- * It also contains the selecting or reselecting device's ID and our
- * ID.
- *
- * Note that this is the register the various IF conditionals can
- * operate on.
- */
-#define SFBR_REG 0x08
-
-/*
- * SCSI input data latch ro
- * In initiator mode, data is latched into this register on the rising
- * edge of REQ/. In target mode, data is latched on the rising edge of
- * ACK/
- */
-#define SIDL_REG_700 0x09
-#define SIDL_REG_800 0x50
-
-/*
- * SCSI bus data lines ro
- * This register reflects the instantaneous status of the SCSI data
- * lines. Note that SCNTL0 must be set to disable parity checking,
- * otherwise reading this register will latch new parity.
- */
-#define SBDL_REG_700 0x0a
-#define SBDL_REG_800 0x58
-
-#define SSID_REG_800 0x0a
-#define SSID_800_VAL 0x80 /* Exactly two bits asserted at sel */
-#define SSID_800_ENCID_MASK 0x07 /* Device which performed operation */
-
-
-/*
- * SCSI bus control lines rw,
- * instantaneous readout of control lines
- */
-#define SOCL_REG 0x0b
-#define SOCL_REQ 0x80 /* REQ ro */
-#define SOCL_ACK 0x40 /* ACK ro */
-#define SOCL_BSY 0x20 /* BSY ro */
-#define SOCL_SEL 0x10 /* SEL ro */
-#define SOCL_ATN 0x08 /* ATN ro */
-#define SOCL_MSG 0x04 /* MSG ro */
-#define SOCL_CD 0x02 /* C/D ro */
-#define SOCL_IO 0x01 /* I/O ro */
-/*
- * Synchronous SCSI Clock Control bits
- * 0 - set by DCNTL
- * 1 - SCLK / 1.0
- * 2 - SCLK / 1.5
- * 3 - SCLK / 2.0
- */
-#define SBCL_SSCF1 0x02 /* wo, -66 only */
-#define SBCL_SSCF0 0x01 /* wo, -66 only */
-#define SBCL_SSCF_MASK 0x03
-
-/*
- * XXX note : when reading the DSTAT and STAT registers to clear interrupts,
- * insure that 10 clocks elapse between the two
- */
-/* DMA status ro */
-#define DSTAT_REG 0x0c
-#define DSTAT_DFE 0x80 /* DMA FIFO empty */
-#define DSTAT_800_MDPE 0x40 /* Master Data Parity Error */
-#define DSTAT_800_BF 0x20 /* Bus Fault */
-#define DSTAT_ABRT 0x10 /* Aborted - set on error */
-#define DSTAT_SSI 0x08 /* SCRIPTS single step interrupt */
-#define DSTAT_SIR 0x04 /* SCRIPTS interrupt received -
- set when INT instruction is
- executed */
-#define DSTAT_WTD 0x02 /* Watchdog timeout detected */
-#define DSTAT_OPC 0x01 /* Illegal instruction */
-#define DSTAT_800_IID 0x01 /* Same thing, different name */
-
-
-/* NCR53c800 moves this stuff into SIST0 */
-#define SSTAT0_REG 0x0d /* SCSI status 0 ro */
-#define SIST0_REG_800 0x42
-#define SSTAT0_MA 0x80 /* ini : phase mismatch,
- * tgt : ATN/ asserted
- */
-#define SSTAT0_CMP 0x40 /* function complete */
-#define SSTAT0_700_STO 0x20 /* Selection or reselection timeout */
-#define SIST0_800_SEL 0x20 /* Selected */
-#define SSTAT0_700_SEL 0x10 /* Selected or reselected */
-#define SIST0_800_RSL 0x10 /* Reselected */
-#define SSTAT0_SGE 0x08 /* SCSI gross error */
-#define SSTAT0_UDC 0x04 /* Unexpected disconnect */
-#define SSTAT0_RST 0x02 /* SCSI RST/ received */
-#define SSTAT0_PAR 0x01 /* Parity error */
-
-/* And uses SSTAT0 for what was SSTAT1 */
-
-#define SSTAT1_REG 0x0e /* SCSI status 1 ro */
-#define SSTAT1_ILF 0x80 /* SIDL full */
-#define SSTAT1_ORF 0x40 /* SODR full */
-#define SSTAT1_OLF 0x20 /* SODL full */
-#define SSTAT1_AIP 0x10 /* Arbitration in progress */
-#define SSTAT1_LOA 0x08 /* Lost arbitration */
-#define SSTAT1_WOA 0x04 /* Won arbitration */
-#define SSTAT1_RST 0x02 /* Instant readout of RST/ */
-#define SSTAT1_SDP 0x01 /* Instant readout of SDP/ */
-
-#define SSTAT2_REG 0x0f /* SCSI status 2 ro */
-#define SSTAT2_FF3 0x80 /* number of bytes in synchronous */
-#define SSTAT2_FF2 0x40 /* data FIFO */
-#define SSTAT2_FF1 0x20
-#define SSTAT2_FF0 0x10
-#define SSTAT2_FF_MASK 0xf0
-#define SSTAT2_FF_SHIFT 4
-
-/*
- * Latched signals, latched on the leading edge of REQ/ for initiators,
- * ACK/ for targets.
- */
-#define SSTAT2_SDP 0x08 /* SDP */
-#define SSTAT2_MSG 0x04 /* MSG */
-#define SSTAT2_CD 0x02 /* C/D */
-#define SSTAT2_IO 0x01 /* I/O */
-#define SSTAT2_PHASE_CMDOUT SSTAT2_CD
-#define SSTAT2_PHASE_DATAIN SSTAT2_IO
-#define SSTAT2_PHASE_DATAOUT 0
-#define SSTAT2_PHASE_MSGIN (SSTAT2_CD|SSTAT2_IO|SSTAT2_MSG)
-#define SSTAT2_PHASE_MSGOUT (SSTAT2_CD|SSTAT2_MSG)
-#define SSTAT2_PHASE_STATIN (SSTAT2_CD|SSTAT2_IO)
-#define SSTAT2_PHASE_MASK (SSTAT2_CD|SSTAT2_IO|SSTAT2_MSG)
-
-
-/* NCR53c700-66 only */
-#define SCRATCHA_REG_00 0x10 /* through 0x13 Scratch A rw */
-/* NCR53c710 and higher */
-#define DSA_REG 0x10 /* DATA structure address */
-
-#define CTEST0_REG_700 0x14 /* Chip test 0 ro */
-#define CTEST0_REG_800 0x18 /* Chip test 0 rw, general purpose */
-/* 0x80 - 0x04 are reserved */
-#define CTEST0_700_RTRG 0x02 /* Real target mode */
-#define CTEST0_700_DDIR 0x01 /* Data direction, 1 =
- * SCSI bus to host, 0 =
- * host to SCSI.
- */
-
-#define CTEST1_REG_700 0x15 /* Chip test 1 ro */
-#define CTEST1_REG_800 0x19 /* Chip test 1 ro */
-#define CTEST1_FMT3 0x80 /* Identify which byte lanes are empty */
-#define CTEST1_FMT2 0x40 /* in the DMA FIFO */
-#define CTEST1_FMT1 0x20
-#define CTEST1_FMT0 0x10
-
-#define CTEST1_FFL3 0x08 /* Identify which bytes lanes are full */
-#define CTEST1_FFL2 0x04 /* in the DMA FIFO */
-#define CTEST1_FFL1 0x02
-#define CTEST1_FFL0 0x01
-
-#define CTEST2_REG_700 0x16 /* Chip test 2 ro */
-#define CTEST2_REG_800 0x1a /* Chip test 2 ro */
-
-#define CTEST2_800_DDIR 0x80 /* 1 = SCSI->host */
-#define CTEST2_800_SIGP 0x40 /* A copy of SIGP in ISTAT.
- Reading this register clears */
-#define CTEST2_800_CIO 0x20 /* Configured as IO */.
-#define CTEST2_800_CM 0x10 /* Configured as memory */
-
-/* 0x80 - 0x40 are reserved on 700 series chips */
-#define CTEST2_700_SOFF 0x20 /* SCSI Offset Compare,
- * As an initiator, this bit is
- * one when the synchronous offset
- * is zero, as a target this bit
- * is one when the synchronous
- * offset is at the maximum
- * defined in SXFER
- */
-#define CTEST2_700_SFP 0x10 /* SCSI FIFO parity bit,
- * reading CTEST3 unloads a byte
- * from the FIFO and sets this
- */
-#define CTEST2_700_DFP 0x08 /* DMA FIFO parity bit,
- * reading CTEST6 unloads a byte
- * from the FIFO and sets this
- */
-#define CTEST2_TEOP 0x04 /* SCSI true end of process,
- * indicates a totally finished
- * transfer
- */
-#define CTEST2_DREQ 0x02 /* Data request signal */
-/* 0x01 is reserved on 700 series chips */
-#define CTEST2_800_DACK 0x01
-
-/*
- * Chip test 3 ro
- * Unloads the bottom byte of the eight deep SCSI synchronous FIFO,
- * check SSTAT2 FIFO full bits to determine size. Note that a GROSS
- * error results if a read is attempted on this register. Also note
- * that 16 and 32 bit reads of this register will cause corruption.
- */
-#define CTEST3_REG_700 0x17
-/* Chip test 3 rw */
-#define CTEST3_REG_800 0x1b
-#define CTEST3_800_V3 0x80 /* Chip revision */
-#define CTEST3_800_V2 0x40
-#define CTEST3_800_V1 0x20
-#define CTEST3_800_V0 0x10
-#define CTEST3_800_FLF 0x08 /* Flush DMA FIFO */
-#define CTEST3_800_CLF 0x04 /* Clear DMA FIFO */
-#define CTEST3_800_FM 0x02 /* Fetch mode pin */
-/* bit 0 is reserved on 800 series chips */
-
-#define CTEST4_REG_700 0x18 /* Chip test 4 rw */
-#define CTEST4_REG_800 0x21 /* Chip test 4 rw */
-/* 0x80 is reserved on 700 series chips */
-#define CTEST4_800_BDIS 0x80 /* Burst mode disable */
-#define CTEST4_ZMOD 0x40 /* High impedance mode */
-#define CTEST4_SZM 0x20 /* SCSI bus high impedance */
-#define CTEST4_700_SLBE 0x10 /* SCSI loopback enabled */
-#define CTEST4_800_SRTM 0x10 /* Shadow Register Test Mode */
-#define CTEST4_700_SFWR 0x08 /* SCSI FIFO write enable,
- * redirects writes from SODL
- * to the SCSI FIFO.
- */
-#define CTEST4_800_MPEE 0x08 /* Enable parity checking
- during master cycles on PCI
- bus */
-
-/*
- * These bits send the contents of the CTEST6 register to the appropriate
- * byte lane of the 32 bit DMA FIFO. Normal operation is zero, otherwise
- * the high bit means the low two bits select the byte lane.
- */
-#define CTEST4_FBL2 0x04
-#define CTEST4_FBL1 0x02
-#define CTEST4_FBL0 0x01
-#define CTEST4_FBL_MASK 0x07
-#define CTEST4_FBL_0 0x04 /* Select DMA FIFO byte lane 0 */
-#define CTEST4_FBL_1 0x05 /* Select DMA FIFO byte lane 1 */
-#define CTEST4_FBL_2 0x06 /* Select DMA FIFO byte lane 2 */
-#define CTEST4_FBL_3 0x07 /* Select DMA FIFO byte lane 3 */
-#define CTEST4_800_SAVE (CTEST4_800_BDIS)
-
-
-#define CTEST5_REG_700 0x19 /* Chip test 5 rw */
-#define CTEST5_REG_800 0x22 /* Chip test 5 rw */
-/*
- * Clock Address Incrementor. When set, it increments the
- * DNAD register to the next bus size boundary. It automatically
- * resets itself when the operation is complete.
- */
-#define CTEST5_ADCK 0x80
-/*
- * Clock Byte Counter. When set, it decrements the DBC register to
- * the next bus size boundary.
- */
-#define CTEST5_BBCK 0x40
-/*
- * Reset SCSI Offset. Setting this bit to 1 clears the current offset
- * pointer in the SCSI synchronous offset counter (SSTAT). This bit
- * is set to 1 if a SCSI Gross Error Condition occurs. The offset should
- * be cleared when a synchronous transfer fails. When written, it is
- * automatically cleared after the SCSI synchronous offset counter is
- * reset.
- */
-/* Bit 5 is reserved on 800 series chips */
-#define CTEST5_700_ROFF 0x20
-/*
- * Master Control for Set or Reset pulses. When 1, causes the low
- * four bits of register to set when set, 0 causes the low bits to
- * clear when set.
- */
-#define CTEST5_MASR 0x10
-#define CTEST5_DDIR 0x08 /* DMA direction */
-/*
- * Bits 2-0 are reserved on 800 series chips
- */
-#define CTEST5_700_EOP 0x04 /* End of process */
-#define CTEST5_700_DREQ 0x02 /* Data request */
-#define CTEST5_700_DACK 0x01 /* Data acknowledge */
-
-/*
- * Chip test 6 rw - writing to this register writes to the byte
- * lane in the DMA FIFO as determined by the FBL bits in the CTEST4
- * register.
- */
-#define CTEST6_REG_700 0x1a
-#define CTEST6_REG_800 0x23
-
-#define CTEST7_REG 0x1b /* Chip test 7 rw */
-/* 0x80 - 0x40 are reserved on NCR53c700 and NCR53c700-66 chips */
-#define CTEST7_10_CDIS 0x80 /* Cache burst disable */
-#define CTEST7_10_SC1 0x40 /* Snoop control bits */
-#define CTEST7_10_SC0 0x20
-#define CTEST7_10_SC_MASK 0x60
-/* 0x20 is reserved on the NCR53c700 */
-#define CTEST7_0060_FM 0x20 /* Fetch mode */
-#define CTEST7_STD 0x10 /* Selection timeout disable */
-#define CTEST7_DFP 0x08 /* DMA FIFO parity bit for CTEST6 */
-#define CTEST7_EVP 0x04 /* 1 = host bus even parity, 0 = odd */
-#define CTEST7_10_TT1 0x02 /* Transfer type */
-#define CTEST7_00_DC 0x02 /* Set to drive DC low during instruction
- fetch */
-#define CTEST7_DIFF 0x01 /* Differential mode */
-
-#define CTEST7_SAVE ( CTEST7_EVP | CTEST7_DIFF )
-
-
-#define TEMP_REG 0x1c /* through 0x1f Temporary stack rw */
-
-#define DFIFO_REG 0x20 /* DMA FIFO rw */
-/*
- * 0x80 is reserved on the NCR53c710, the CLF and FLF bits have been
- * moved into the CTEST8 register.
- */
-#define DFIFO_00_FLF 0x80 /* Flush DMA FIFO to memory */
-#define DFIFO_00_CLF 0x40 /* Clear DMA and SCSI FIFOs */
-#define DFIFO_BO6 0x40
-#define DFIFO_BO5 0x20
-#define DFIFO_BO4 0x10
-#define DFIFO_BO3 0x08
-#define DFIFO_BO2 0x04
-#define DFIFO_BO1 0x02
-#define DFIFO_BO0 0x01
-#define DFIFO_10_BO_MASK 0x7f /* 7 bit counter */
-#define DFIFO_00_BO_MASK 0x3f /* 6 bit counter */
-
-/*
- * Interrupt status rw
- * Note that this is the only register which can be read while SCSI
- * SCRIPTS are being executed.
- */
-#define ISTAT_REG_700 0x21
-#define ISTAT_REG_800 0x14
-#define ISTAT_ABRT 0x80 /* Software abort, write
- *1 to abort, wait for interrupt. */
-/* 0x40 and 0x20 are reserved on NCR53c700 and NCR53c700-66 chips */
-#define ISTAT_10_SRST 0x40 /* software reset */
-#define ISTAT_10_SIGP 0x20 /* signal script */
-/* 0x10 is reserved on NCR53c700 series chips */
-#define ISTAT_800_SEM 0x10 /* semaphore */
-#define ISTAT_CON 0x08 /* 1 when connected */
-#define ISTAT_800_INTF 0x04 /* Interrupt on the fly */
-#define ISTAT_700_PRE 0x04 /* Pointer register empty.
- * Set to 1 when DSPS and DSP
- * registers are empty in pipeline
- * mode, always set otherwise.
- */
-#define ISTAT_SIP 0x02 /* SCSI interrupt pending from
- * SCSI portion of SIOP see
- * SSTAT0
- */
-#define ISTAT_DIP 0x01 /* DMA interrupt pending
- * see DSTAT
- */
-
-/* NCR53c700-66 and NCR53c710 only */
-#define CTEST8_REG 0x22 /* Chip test 8 rw */
-#define CTEST8_0066_EAS 0x80 /* Enable alternate SCSI clock,
- * ie read from SCLK/ rather than CLK/
- */
-#define CTEST8_0066_EFM 0x40 /* Enable fetch and master outputs */
-#define CTEST8_0066_GRP 0x20 /* Generate Receive Parity for
- * pass through. This insures that
- * bad parity won't reach the host
- * bus.
- */
-#define CTEST8_0066_TE 0x10 /* TolerANT enable. Enable
- * active negation, should only
- * be used for slow SCSI
- * non-differential.
- */
-#define CTEST8_0066_HSC 0x08 /* Halt SCSI clock */
-#define CTEST8_0066_SRA 0x04 /* Shorten REQ/ACK filtering,
- * must be set for fast SCSI-II
- * speeds.
- */
-#define CTEST8_0066_DAS 0x02 /* Disable automatic target/initiator
- * switching.
- */
-#define CTEST8_0066_LDE 0x01 /* Last disconnect enable.
- * The status of pending
- * disconnect is maintained by
- * the core, eliminating
- * the possibility of missing a
- * selection or reselection
- * while waiting to fetch a
- * WAIT DISCONNECT opcode.
- */
-
-#define CTEST8_10_V3 0x80 /* Chip revision */
-#define CTEST8_10_V2 0x40
-#define CTEST8_10_V1 0x20
-#define CTEST8_10_V0 0x10
-#define CTEST8_10_V_MASK 0xf0
-#define CTEST8_10_FLF 0x08 /* Flush FIFOs */
-#define CTEST8_10_CLF 0x04 /* Clear FIFOs */
-#define CTEST8_10_FM 0x02 /* Fetch pin mode */
-#define CTEST8_10_SM 0x01 /* Snoop pin mode */
-
-
-/*
- * The CTEST9 register may be used to differentiate between a
- * NCR53c700 and a NCR53c710.
- *
- * Write 0xff to this register.
- * Read it.
- * If the contents are 0xff, it is a NCR53c700
- * If the contents are 0x00, it is a NCR53c700-66 first revision
- * If the contents are some other value, it is some other NCR53c700-66
- */
-#define CTEST9_REG_00 0x23 /* Chip test 9 ro */
-#define LCRC_REG_10 0x23
-
-/*
- * 0x24 through 0x27 are the DMA byte counter register. Instructions
- * write their high 8 bits into the DCMD register, the low 24 bits into
- * the DBC register.
- *
- * Function is dependent on the command type being executed.
- */
-
-
-#define DBC_REG 0x24
-/*
- * For Block Move Instructions, DBC is a 24 bit quantity representing
- * the number of bytes to transfer.
- * For Transfer Control Instructions, DBC is bit fielded as follows :
- */
-/* Bits 20 - 23 should be clear */
-#define DBC_TCI_TRUE (1 << 19) /* Jump when true */
-#define DBC_TCI_COMPARE_DATA (1 << 18) /* Compare data */
-#define DBC_TCI_COMPARE_PHASE (1 << 17) /* Compare phase with DCMD field */
-#define DBC_TCI_WAIT_FOR_VALID (1 << 16) /* Wait for REQ */
-/* Bits 8 - 15 are reserved on some implementations ? */
-#define DBC_TCI_MASK_MASK 0xff00 /* Mask for data compare */
-#define DBC_TCI_MASK_SHIFT 8
-#define DBC_TCI_DATA_MASK 0xff /* Data to be compared */
-#define DBC_TCI_DATA_SHIFT 0
-
-#define DBC_RWRI_IMMEDIATE_MASK 0xff00 /* Immediate data */
-#define DBC_RWRI_IMMEDIATE_SHIFT 8 /* Amount to shift */
-#define DBC_RWRI_ADDRESS_MASK 0x3f0000 /* Register address */
-#define DBC_RWRI_ADDRESS_SHIFT 16
-
-
-/*
- * DMA command r/w
- */
-#define DCMD_REG 0x27
-#define DCMD_TYPE_MASK 0xc0 /* Masks off type */
-#define DCMD_TYPE_BMI 0x00 /* Indicates a Block Move instruction */
-#define DCMD_BMI_IO 0x01 /* I/O, CD, and MSG bits selecting */
-#define DCMD_BMI_CD 0x02 /* the phase for the block MOVE */
-#define DCMD_BMI_MSG 0x04 /* instruction */
-
-#define DCMD_BMI_OP_MASK 0x18 /* mask for opcode */
-#define DCMD_BMI_OP_MOVE_T 0x00 /* MOVE */
-#define DCMD_BMI_OP_MOVE_I 0x08 /* MOVE Initiator */
-
-#define DCMD_BMI_INDIRECT 0x20 /* Indirect addressing */
-
-#define DCMD_TYPE_TCI 0x80 /* Indicates a Transfer Control
- instruction */
-#define DCMD_TCI_IO 0x01 /* I/O, CD, and MSG bits selecting */
-#define DCMD_TCI_CD 0x02 /* the phase for the block MOVE */
-#define DCMD_TCI_MSG 0x04 /* instruction */
-#define DCMD_TCI_OP_MASK 0x38 /* mask for opcode */
-#define DCMD_TCI_OP_JUMP 0x00 /* JUMP */
-#define DCMD_TCI_OP_CALL 0x08 /* CALL */
-#define DCMD_TCI_OP_RETURN 0x10 /* RETURN */
-#define DCMD_TCI_OP_INT 0x18 /* INT */
-
-#define DCMD_TYPE_RWRI 0x40 /* Indicates I/O or register Read/Write
- instruction */
-#define DCMD_RWRI_OPC_MASK 0x38 /* Opcode mask */
-#define DCMD_RWRI_OPC_WRITE 0x28 /* Write SFBR to register */
-#define DCMD_RWRI_OPC_READ 0x30 /* Read register to SFBR */
-#define DCMD_RWRI_OPC_MODIFY 0x38 /* Modify in place */
-
-#define DCMD_RWRI_OP_MASK 0x07
-#define DCMD_RWRI_OP_MOVE 0x00
-#define DCMD_RWRI_OP_SHL 0x01
-#define DCMD_RWRI_OP_OR 0x02
-#define DCMD_RWRI_OP_XOR 0x03
-#define DCMD_RWRI_OP_AND 0x04
-#define DCMD_RWRI_OP_SHR 0x05
-#define DCMD_RWRI_OP_ADD 0x06
-#define DCMD_RWRI_OP_ADDC 0x07
-
-#define DCMD_TYPE_MMI 0xc0 /* Indicates a Memory Move instruction
- (three words) */
-
-
-#define DNAD_REG 0x28 /* through 0x2b DMA next address for
- data */
-#define DSP_REG 0x2c /* through 0x2f DMA SCRIPTS pointer rw */
-#define DSPS_REG 0x30 /* through 0x33 DMA SCRIPTS pointer
- save rw */
-#define DMODE_REG_00 0x34 /* DMA mode rw */
-#define DMODE_00_BL1 0x80 /* Burst length bits */
-#define DMODE_00_BL0 0x40
-#define DMODE_BL_MASK 0xc0
-/* Burst lengths (800) */
-#define DMODE_BL_2 0x00 /* 2 transfer */
-#define DMODE_BL_4 0x40 /* 4 transfers */
-#define DMODE_BL_8 0x80 /* 8 transfers */
-#define DMODE_BL_16 0xc0 /* 16 transfers */
-
-#define DMODE_700_BW16 0x20 /* Host buswidth = 16 */
-#define DMODE_700_286 0x10 /* 286 mode */
-#define DMODE_700_IOM 0x08 /* Transfer to IO port */
-#define DMODE_700_FAM 0x04 /* Fixed address mode */
-#define DMODE_700_PIPE 0x02 /* Pipeline mode disables
- * automatic fetch / exec
- */
-#define DMODE_MAN 0x01 /* Manual start mode,
- * requires a 1 to be written
- * to the start DMA bit in the DCNTL
- * register to run scripts
- */
-
-#define DMODE_700_SAVE ( DMODE_00_BL_MASK | DMODE_00_BW16 | DMODE_00_286 )
-
-/* NCR53c800 series only */
-#define SCRATCHA_REG_800 0x34 /* through 0x37 Scratch A rw */
-/* NCR53c710 only */
-#define SCRATCB_REG_10 0x34 /* through 0x37 scratch B rw */
-
-#define DMODE_REG_10 0x38 /* DMA mode rw, NCR53c710 and newer */
-#define DMODE_800_SIOM 0x20 /* Source IO = 1 */
-#define DMODE_800_DIOM 0x10 /* Destination IO = 1 */
-#define DMODE_800_ERL 0x08 /* Enable Read Line */
-
-/* 35-38 are reserved on 700 and 700-66 series chips */
-#define DIEN_REG 0x39 /* DMA interrupt enable rw */
-/* 0x80, 0x40, and 0x20 are reserved on 700-series chips */
-#define DIEN_800_MDPE 0x40 /* Master data parity error */
-#define DIEN_800_BF 0x20 /* BUS fault */
-#define DIEN_ABRT 0x10 /* Enable aborted interrupt */
-#define DIEN_SSI 0x08 /* Enable single step interrupt */
-#define DIEN_SIR 0x04 /* Enable SCRIPTS INT command
- * interrupt
- */
-/* 0x02 is reserved on 800 series chips */
-#define DIEN_700_WTD 0x02 /* Enable watchdog timeout interrupt */
-#define DIEN_700_OPC 0x01 /* Enable illegal instruction
- * interrupt
- */
-#define DIEN_800_IID 0x01 /* Same meaning, different name */
-
-/*
- * DMA watchdog timer rw
- * set in 16 CLK input periods.
- */
-#define DWT_REG 0x3a
-
-/* DMA control rw */
-#define DCNTL_REG 0x3b
-#define DCNTL_700_CF1 0x80 /* Clock divisor bits */
-#define DCNTL_700_CF0 0x40
-#define DCNTL_700_CF_MASK 0xc0
-/* Clock divisors Divisor SCLK range (MHZ) */
-#define DCNTL_700_CF_2 0x00 /* 2.0 37.51-50.00 */
-#define DCNTL_700_CF_1_5 0x40 /* 1.5 25.01-37.50 */
-#define DCNTL_700_CF_1 0x80 /* 1.0 16.67-25.00 */
-#define DCNTL_700_CF_3 0xc0 /* 3.0 50.01-66.67 (53c700-66) */
-
-#define DCNTL_700_S16 0x20 /* Load scripts 16 bits at a time */
-#define DCNTL_SSM 0x10 /* Single step mode */
-#define DCNTL_700_LLM 0x08 /* Low level mode, can only be set
- * after selection */
-#define DCNTL_800_IRQM 0x08 /* Totem pole IRQ pin */
-#define DCNTL_STD 0x04 /* Start DMA / SCRIPTS */
-/* 0x02 is reserved */
-#define DCNTL_00_RST 0x01 /* Software reset, resets everything
- * but 286 mode bit in DMODE. On the
- * NCR53c710, this bit moved to CTEST8
- */
-#define DCNTL_10_COM 0x01 /* 700 software compatibility mode */
-
-#define DCNTL_700_SAVE ( DCNTL_CF_MASK | DCNTL_S16)
-
-
-/* NCR53c700-66 only */
-#define SCRATCHB_REG_00 0x3c /* through 0x3f scratch b rw */
-#define SCRATCHB_REG_800 0x5c /* through 0x5f scratch b rw */
-/* NCR53c710 only */
-#define ADDER_REG_10 0x3c /* Adder, NCR53c710 only */
-
-#define SIEN1_REG_800 0x41
-#define SIEN1_800_STO 0x04 /* selection/reselection timeout */
-#define SIEN1_800_GEN 0x02 /* general purpose timer */
-#define SIEN1_800_HTH 0x01 /* handshake to handshake */
-
-#define SIST1_REG_800 0x43
-#define SIST1_800_STO 0x04 /* selection/reselection timeout */
-#define SIST1_800_GEN 0x02 /* general purpose timer */
-#define SIST1_800_HTH 0x01 /* handshake to handshake */
-
-#define SLPAR_REG_800 0x44 /* Parity */
-
-#define MACNTL_REG_800 0x46 /* Memory access control */
-#define MACNTL_800_TYP3 0x80
-#define MACNTL_800_TYP2 0x40
-#define MACNTL_800_TYP1 0x20
-#define MACNTL_800_TYP0 0x10
-#define MACNTL_800_DWR 0x08
-#define MACNTL_800_DRD 0x04
-#define MACNTL_800_PSCPT 0x02
-#define MACNTL_800_SCPTS 0x01
-
-#define GPCNTL_REG_800 0x47 /* General Purpose Pin Control */
-
-/* Timeouts are expressed such that 0=off, 1=100us, doubling after that */
-#define STIME0_REG_800 0x48 /* SCSI Timer Register 0 */
-#define STIME0_800_HTH_MASK 0xf0 /* Handshake to Handshake timeout */
-#define STIME0_800_HTH_SHIFT 4
-#define STIME0_800_SEL_MASK 0x0f /* Selection timeout */
-#define STIME0_800_SEL_SHIFT 0
-
-#define STIME1_REG_800 0x49
-#define STIME1_800_GEN_MASK 0x0f /* General purpose timer */
-
-#define RESPID_REG_800 0x4a /* Response ID, bit fielded. 8
- bits on narrow chips, 16 on WIDE */
-
-#define STEST0_REG_800 0x4c
-#define STEST0_800_SLT 0x08 /* Selection response logic test */
-#define STEST0_800_ART 0x04 /* Arbitration priority encoder test */
-#define STEST0_800_SOZ 0x02 /* Synchronous offset zero */
-#define STEST0_800_SOM 0x01 /* Synchronous offset maximum */
-
-#define STEST1_REG_800 0x4d
-#define STEST1_800_SCLK 0x80 /* Disable SCSI clock */
-
-#define STEST2_REG_800 0x4e
-#define STEST2_800_SCE 0x80 /* Enable SOCL/SODL */
-#define STEST2_800_ROF 0x40 /* Reset SCSI sync offset */
-#define STEST2_800_SLB 0x10 /* Enable SCSI loopback mode */
-#define STEST2_800_SZM 0x08 /* SCSI high impedance mode */
-#define STEST2_800_EXT 0x02 /* Extend REQ/ACK filter 30 to 60ns */
-#define STEST2_800_LOW 0x01 /* SCSI low level mode */
-
-#define STEST3_REG_800 0x4f
-#define STEST3_800_TE 0x80 /* Enable active negation */
-#define STEST3_800_STR 0x40 /* SCSI FIFO test read */
-#define STEST3_800_HSC 0x20 /* Halt SCSI clock */
-#define STEST3_800_DSI 0x10 /* Disable single initiator response */
-#define STEST3_800_TTM 0x04 /* Time test mode */
-#define STEST3_800_CSF 0x02 /* Clear SCSI FIFO */
-#define STEST3_800_STW 0x01 /* SCSI FIFO test write */
-
-#define OPTION_PARITY 0x1 /* Enable parity checking */
-#define OPTION_TAGGED_QUEUE 0x2 /* Enable SCSI-II tagged queuing */
-#define OPTION_700 0x8 /* Always run NCR53c700 scripts */
-#define OPTION_INTFLY 0x10 /* Use INTFLY interrupts */
-#define OPTION_DEBUG_INTR 0x20 /* Debug interrupts */
-#define OPTION_DEBUG_INIT_ONLY 0x40 /* Run initialization code and
- simple test code, return
- DID_NO_CONNECT if any SCSI
- commands are attempted. */
-#define OPTION_DEBUG_READ_ONLY 0x80 /* Return DID_ERROR if any
- SCSI write is attempted */
-#define OPTION_DEBUG_TRACE 0x100 /* Animated trace mode, print
- each address and instruction
- executed to debug buffer. */
-#define OPTION_DEBUG_SINGLE 0x200 /* stop after executing one
- instruction */
-#define OPTION_SYNCHRONOUS 0x400 /* Enable sync SCSI. */
-#define OPTION_MEMORY_MAPPED 0x800 /* NCR registers have valid
- memory mapping */
-#define OPTION_IO_MAPPED 0x1000 /* NCR registers have valid
- I/O mapping */
-#define OPTION_DEBUG_PROBE_ONLY 0x2000 /* Probe only, don't even init */
-#define OPTION_DEBUG_TESTS_ONLY 0x4000 /* Probe, init, run selected tests */
-#define OPTION_DEBUG_TEST0 0x08000 /* Run test 0 */
-#define OPTION_DEBUG_TEST1 0x10000 /* Run test 1 */
-#define OPTION_DEBUG_TEST2 0x20000 /* Run test 2 */
-#define OPTION_DEBUG_DUMP 0x40000 /* Dump commands */
-#define OPTION_DEBUG_TARGET_LIMIT 0x80000 /* Only talk to target+luns specified */
-#define OPTION_DEBUG_NCOMMANDS_LIMIT 0x100000 /* Limit the number of commands */
-#define OPTION_DEBUG_SCRIPT 0x200000 /* Print when checkpoints are passed */
-#define OPTION_DEBUG_FIXUP 0x400000 /* print fixup values */
-#define OPTION_DEBUG_DSA 0x800000
-#define OPTION_DEBUG_CORRUPTION 0x1000000 /* Detect script corruption */
-#define OPTION_DEBUG_SDTR 0x2000000 /* Debug SDTR problem */
-#define OPTION_DEBUG_MISMATCH 0x4000000 /* Debug phase mismatches */
-#define OPTION_DISCONNECT 0x8000000 /* Allow disconnect */
-#define OPTION_DEBUG_DISCONNECT 0x10000000
-#define OPTION_ALWAYS_SYNCHRONOUS 0x20000000 /* Negotiate sync. transfers
- on power up */
-#define OPTION_DEBUG_QUEUES 0x80000000
-#define OPTION_DEBUG_ALLOCATION 0x100000000LL
-#define OPTION_DEBUG_SYNCHRONOUS 0x200000000LL /* Sanity check SXFER and
- SCNTL3 registers */
-#define OPTION_NO_ASYNC 0x400000000LL /* Don't automagically send
- SDTR for async transfers when
- we haven't been told to do
- a synchronous transfer. */
-#define OPTION_NO_PRINT_RACE 0x800000000LL /* Don't print message when
- the reselect/WAIT DISCONNECT
- race condition hits */
-#if !defined(PERM_OPTIONS)
-#define PERM_OPTIONS 0
-#endif
-
-struct NCR53c7x0_synchronous {
- u32 select_indirect; /* Value used for indirect selection */
- u32 script[8]; /* Size ?? Script used when target is
- reselected */
- unsigned char synchronous_want[5]; /* Per target desired SDTR */
-/*
- * Set_synchronous programs these, select_indirect and current settings after
- * int_debug_should show a match.
- */
- unsigned char sxfer_sanity, scntl3_sanity;
-};
-
-#define CMD_FLAG_SDTR 1 /* Initiating synchronous
- transfer negotiation */
-#define CMD_FLAG_WDTR 2 /* Initiating wide transfer
- negotiation */
-#define CMD_FLAG_DID_SDTR 4 /* did SDTR */
-#define CMD_FLAG_DID_WDTR 8 /* did WDTR */
-
-struct NCR53c7x0_table_indirect {
- u32 count;
- void *address;
-};
-
-enum ncr_event {
- EVENT_NONE = 0,
-/*
- * Order is IMPORTANT, since these must correspond to the event interrupts
- * in 53c7,8xx.scr
- */
-
- EVENT_ISSUE_QUEUE = 0x5000000, /* Command was added to issue queue */
- EVENT_START_QUEUE, /* Command moved to start queue */
- EVENT_SELECT, /* Command completed selection */
- EVENT_DISCONNECT, /* Command disconnected */
- EVENT_RESELECT, /* Command reselected */
- EVENT_COMPLETE, /* Command completed */
- EVENT_IDLE,
- EVENT_SELECT_FAILED,
- EVENT_BEFORE_SELECT,
- EVENT_RESELECT_FAILED
-};
-
-struct NCR53c7x0_event {
- enum ncr_event event; /* What type of event */
- unsigned char target;
- unsigned char lun;
- struct timeval time;
- u32 *dsa; /* What's in the DSA register now (virt) */
-/*
- * A few things from that SCSI pid so we know what happened after
- * the Scsi_Cmnd structure in question may have disappeared.
- */
- unsigned long pid; /* The SCSI PID which caused this
- event */
- unsigned char cmnd[12];
-};
-
-/*
- * Things in the NCR53c7x0_cmd structure are split into two parts :
- *
- * 1. A fixed portion, for things which are not accessed directly by static NCR
- * code (ie, are referenced only by the Linux side of the driver,
- * or only by dynamically generated code).
- *
- * 2. The DSA portion, for things which are accessed directly by static NCR
- * code.
- *
- * This is a little ugly, but it
- * 1. Avoids conflicts between the NCR code's picture of the structure, and
- * Linux code's idea of what it looks like.
- *
- * 2. Minimizes the pain in the Linux side of the code needed
- * to calculate real dsa locations for things, etc.
- *
- */
-
-struct NCR53c7x0_cmd {
- void *real; /* Real, unaligned address for
- free function */
- void (* free)(void *, int); /* Command to deallocate; NULL
- for structures allocated with
- scsi_register, etc. */
- Scsi_Cmnd *cmd; /* Associated Scsi_Cmnd
- structure, Scsi_Cmnd points
- at NCR53c7x0_cmd using
- host_scribble structure */
-
- int size; /* scsi_malloc'd size of this
- structure */
-
- int flags; /* CMD_* flags */
-
-/*
- * SDTR and WIDE messages are an either/or affair
- * in this message, since we will go into message out and send
- * _the whole mess_ without dropping out of message out to
- * let the target go into message in after sending the first
- * message.
- */
-
- unsigned char select[11]; /* Select message, includes
- IDENTIFY
- (optional) QUEUE TAG
- (optional) SDTR or WDTR
- */
-
-
- volatile struct NCR53c7x0_cmd *next; /* Linux maintained lists (free,
- running, eventually finished */
-
-
- u32 *data_transfer_start; /* Start of data transfer routines */
- u32 *data_transfer_end; /* Address after end of data transfer o
- routines */
-/*
- * The following three fields were moved from the DSA proper to here
- * since only dynamically generated NCR code refers to them, meaning
- * we don't need dsa_* absolutes, and it is simpler to let the
- * host code refer to them directly.
- */
-
-/*
- * HARD CODED : residual and saved_residual need to agree with the sizes
- * used in NCR53c7,8xx.scr.
- *
- * FIXME: we want to consider the case where we have odd-length
- * scatter/gather buffers and a WIDE transfer, in which case
- * we'll need to use the CHAIN MOVE instruction. Ick.
- */
- u32 residual[6]; /* Residual data transfer which
- allows pointer code to work
- right.
-
- [0-1] : Conditional call to
- appropriate other transfer
- routine.
- [2-3] : Residual block transfer
- instruction.
- [4-5] : Jump to instruction
- after splice.
- */
- u32 saved_residual[6]; /* Copy of old residual, so we
- can get another partial
- transfer and still recover
- */
-
- u32 saved_data_pointer; /* Saved data pointer */
-
- u32 dsa_next_addr; /* _Address_ of dsa_next field
- in this dsa for RISCy
- style constant. */
-
- u32 dsa_addr; /* Address of dsa; RISCy style
- constant */
-
- u32 dsa[0]; /* Variable length (depending
- on host type, number of scatter /
- gather buffers, etc). */
-};
-
-struct NCR53c7x0_break {
- u32 *address, old_instruction[2];
- struct NCR53c7x0_break *next;
- unsigned char old_size; /* Size of old instruction */
-};
-
-/* Indicates that the NCR is not executing code */
-#define STATE_HALTED 0
-/*
- * Indicates that the NCR is executing the wait for select / reselect
- * script. Only used when running NCR53c700 compatible scripts, only
- * state during which an ABORT is _not_ considered an error condition.
- */
-#define STATE_WAITING 1
-/* Indicates that the NCR is executing other code. */
-#define STATE_RUNNING 2
-/*
- * Indicates that the NCR was being aborted.
- */
-#define STATE_ABORTING 3
-/* Indicates that the NCR was successfully aborted. */
-#define STATE_ABORTED 4
-/* Indicates that the NCR has been disabled due to a fatal error */
-#define STATE_DISABLED 5
-
-/*
- * Where knowledge of SCSI SCRIPT(tm) specified values are needed
- * in an interrupt handler, an interrupt handler exists for each
- * different SCSI script so we don't have name space problems.
- *
- * Return values of these handlers are as follows :
- */
-#define SPECIFIC_INT_NOTHING 0 /* don't even restart */
-#define SPECIFIC_INT_RESTART 1 /* restart at the next instruction */
-#define SPECIFIC_INT_ABORT 2 /* recoverable error, abort cmd */
-#define SPECIFIC_INT_PANIC 3 /* unrecoverable error, panic */
-#define SPECIFIC_INT_DONE 4 /* normal command completion */
-#define SPECIFIC_INT_BREAK 5 /* break point encountered */
-
-struct NCR53c7x0_hostdata {
- int size; /* Size of entire Scsi_Host
- structure */
- int board; /* set to board type, useful if
- we have host specific things,
- ie, a general purpose I/O
- bit is being used to enable
- termination, etc. */
-
- int chip; /* set to chip type; 700-66 is
- 700-66, rest are last three
- digits of part number */
- /*
- * PCI device, only for NCR53c8x0 chips.
- * pci_valid indicates that the PCI configuration information
- * is valid, and we can twiddle MAX_LAT, etc. as recommended
- * for maximum performance in the NCR documentation.
- */
- struct pci_dev *pci_dev;
- unsigned pci_valid:1;
-
- u32 *dsp; /* dsp to restart with after
- all stacked interrupts are
- handled. */
-
- unsigned dsp_changed:1; /* Has dsp changed within this
- set of stacked interrupts ? */
-
- unsigned char dstat; /* Most recent value of dstat */
- unsigned dstat_valid:1;
-
- unsigned expecting_iid:1; /* Expect IID interrupt */
- unsigned expecting_sto:1; /* Expect STO interrupt */
-
- /*
- * The code stays cleaner if we use variables with function
- * pointers and offsets that are unique for the different
- * scripts rather than having a slew of switch(hostdata->chip)
- * statements.
- *
- * It also means that the #defines from the SCSI SCRIPTS(tm)
- * don't have to be visible outside of the script-specific
- * instructions, preventing name space pollution.
- */
-
- void (* init_fixup)(struct Scsi_Host *host);
- void (* init_save_regs)(struct Scsi_Host *host);
- void (* dsa_fixup)(struct NCR53c7x0_cmd *cmd);
- void (* soft_reset)(struct Scsi_Host *host);
- int (* run_tests)(struct Scsi_Host *host);
-
- /*
- * Called when DSTAT_SIR is set, indicating an interrupt generated
- * by the INT instruction, where values are unique for each SCSI
- * script. Should return one of the SPEC_* values.
- */
-
- int (* dstat_sir_intr)(struct Scsi_Host *host, struct NCR53c7x0_cmd *cmd);
-
- int dsa_len; /* Size of DSA structure */
-
- /*
- * Location of DSA fields for the SCSI SCRIPT corresponding to this
- * chip.
- */
-
- s32 dsa_start;
- s32 dsa_end;
- s32 dsa_next;
- s32 dsa_prev;
- s32 dsa_cmnd;
- s32 dsa_select;
- s32 dsa_msgout;
- s32 dsa_cmdout;
- s32 dsa_dataout;
- s32 dsa_datain;
- s32 dsa_msgin;
- s32 dsa_msgout_other;
- s32 dsa_write_sync;
- s32 dsa_write_resume;
- s32 dsa_check_reselect;
- s32 dsa_status;
- s32 dsa_saved_pointer;
- s32 dsa_jump_dest;
-
- /*
- * Important entry points that generic fixup code needs
- * to know about, fixed up.
- */
-
- s32 E_accept_message;
- s32 E_command_complete;
- s32 E_data_transfer;
- s32 E_dsa_code_template;
- s32 E_dsa_code_template_end;
- s32 E_end_data_transfer;
- s32 E_msg_in;
- s32 E_initiator_abort;
- s32 E_other_transfer;
- s32 E_other_in;
- s32 E_other_out;
- s32 E_target_abort;
- s32 E_debug_break;
- s32 E_reject_message;
- s32 E_respond_message;
- s32 E_select;
- s32 E_select_msgout;
- s32 E_test_0;
- s32 E_test_1;
- s32 E_test_2;
- s32 E_test_3;
- s32 E_dsa_zero;
- s32 E_cmdout_cmdout;
- s32 E_wait_reselect;
- s32 E_dsa_code_begin;
-
- long long options; /* Bitfielded set of options enabled */
- volatile u32 test_completed; /* Test completed */
- int test_running; /* Test currently running */
- s32 test_source;
- volatile s32 test_dest;
-
- volatile int state; /* state of driver, only used for
- OPTION_700 */
-
- unsigned char dmode; /*
- * set to the address of the DMODE
- * register for this chip.
- */
- unsigned char istat; /*
- * set to the address of the ISTAT
- * register for this chip.
- */
-
- int scsi_clock; /*
- * SCSI clock in HZ. 0 may be used
- * for unknown, although this will
- * disable synchronous negotiation.
- */
-
- volatile int intrs; /* Number of interrupts */
- volatile int resets; /* Number of SCSI resets */
- unsigned char saved_dmode;
- unsigned char saved_ctest4;
- unsigned char saved_ctest7;
- unsigned char saved_dcntl;
- unsigned char saved_scntl3;
-
- unsigned char this_id_mask;
-
- /* Debugger information */
- struct NCR53c7x0_break *breakpoints, /* Linked list of all break points */
- *breakpoint_current; /* Current breakpoint being stepped
- through, NULL if we are running
- normally. */
-#ifdef NCR_DEBUG
- int debug_size; /* Size of debug buffer */
- volatile int debug_count; /* Current data count */
- volatile char *debug_buf; /* Output ring buffer */
- volatile char *debug_write; /* Current write pointer */
- volatile char *debug_read; /* Current read pointer */
-#endif /* def NCR_DEBUG */
-
- /* XXX - primitive debugging junk, remove when working ? */
- int debug_print_limit; /* Number of commands to print
- out exhaustive debugging
- information for if
- OPTION_DEBUG_DUMP is set */
-
- unsigned char debug_lun_limit[16]; /* If OPTION_DEBUG_TARGET_LIMIT
- set, puke if commands are sent
- to other target/lun combinations */
-
- int debug_count_limit; /* Number of commands to execute
- before puking to limit debugging
- output */
-
-
- volatile unsigned idle:1; /* set to 1 if idle */
-
- /*
- * Table of synchronous+wide transfer parameters set on a per-target
- * basis.
- */
-
- volatile struct NCR53c7x0_synchronous sync[16];
-
- volatile Scsi_Cmnd *issue_queue;
- /* waiting to be issued by
- Linux driver */
- volatile struct NCR53c7x0_cmd *running_list;
- /* commands running, maintained
- by Linux driver */
-
- volatile struct NCR53c7x0_cmd *curr; /* currently connected
- nexus, ONLY valid for
- NCR53c700/NCR53c700-66
- */
-
- volatile struct NCR53c7x0_cmd *spare; /* pointer to spare,
- allocated at probe time,
- which we can use for
- initialization */
- volatile struct NCR53c7x0_cmd *free;
- int max_cmd_size; /* Maximum size of NCR53c7x0_cmd
- based on number of
- scatter/gather segments, etc.
- */
- volatile int num_cmds; /* Number of commands
- allocated */
- volatile int extra_allocate;
- volatile unsigned char cmd_allocated[16]; /* Have we allocated commands
- for this target yet? If not,
- do so ASAP */
- volatile unsigned char busy[16][8]; /* number of commands
- executing on each target
- */
- /*
- * Eventually, I'll switch to a coroutine for calling
- * cmd->done(cmd), etc. so that we can overlap interrupt
- * processing with this code for maximum performance.
- */
-
- volatile struct NCR53c7x0_cmd *finished_queue;
-
-
- /* Shared variables between SCRIPT and host driver */
- volatile u32 *schedule; /* Array of JUMPs to dsa_begin
- routines of various DSAs.
- When not in use, replace
- with jump to next slot */
-
-
- volatile unsigned char msg_buf[16]; /* buffer for messages
- other than the command
- complete message */
-
- /* Per-target default synchronous and WIDE messages */
- volatile unsigned char synchronous_want[16][5];
- volatile unsigned char wide_want[16][4];
-
- /* Bit fielded set of targets we want to speak synchronously with */
- volatile u16 initiate_sdtr;
- /* Bit fielded set of targets we want to speak wide with */
- volatile u16 initiate_wdtr;
- /* Bit fielded list of targets we've talked to. */
- volatile u16 talked_to;
-
- /* Array of bit-fielded lun lists that we need to request_sense */
- volatile unsigned char request_sense[16];
-
- u32 addr_reconnect_dsa_head; /* RISCy style constant,
- address of following */
- volatile u32 reconnect_dsa_head;
- /* Data identifying nexus we are trying to match during reselection */
- volatile unsigned char reselected_identify; /* IDENTIFY message */
- volatile unsigned char reselected_tag; /* second byte of queue tag
- message or 0 */
- /* These were static variables before we moved them */
-
- s32 NCR53c7xx_zero;
- s32 NCR53c7xx_sink;
- u32 NOP_insn;
- char NCR53c7xx_msg_reject;
- char NCR53c7xx_msg_abort;
- char NCR53c7xx_msg_nop;
-
- volatile int event_size, event_index;
- volatile struct NCR53c7x0_event *events;
-
- /* If we need to generate code to kill off the currently connected
- command, this is where we do it. Should have a BMI instruction
- to source or sink the current data, followed by a JUMP
- to abort_connected */
-
- u32 *abort_script;
-
- int script_count; /* Size of script in words */
- u32 script[0]; /* Relocated SCSI script */
-
-};
-
-#define IRQ_NONE 255
-#define DMA_NONE 255
-#define IRQ_AUTO 254
-#define DMA_AUTO 254
-
-#define BOARD_GENERIC 0
-
-#define NCR53c7x0_insn_size(insn) \
- (((insn) & DCMD_TYPE_MASK) == DCMD_TYPE_MMI ? 3 : 2)
-
-
-#define NCR53c7x0_local_declare() \
- volatile unsigned char *NCR53c7x0_address_memory; \
- unsigned int NCR53c7x0_address_io; \
- int NCR53c7x0_memory_mapped
-
-#define NCR53c7x0_local_setup(host) \
- NCR53c7x0_address_memory = (void *) (host)->base; \
- NCR53c7x0_address_io = (unsigned int) (host)->io_port; \
- NCR53c7x0_memory_mapped = ((struct NCR53c7x0_hostdata *) \
- host->hostdata)-> options & OPTION_MEMORY_MAPPED
-
-#define NCR53c7x0_read8(address) \
- (NCR53c7x0_memory_mapped ? \
- (unsigned int)readb(NCR53c7x0_address_memory + (address)) : \
- inb(NCR53c7x0_address_io + (address)))
-
-#define NCR53c7x0_read16(address) \
- (NCR53c7x0_memory_mapped ? \
- (unsigned int)readw(NCR53c7x0_address_memory + (address)) : \
- inw(NCR53c7x0_address_io + (address)))
-
-#define NCR53c7x0_read32(address) \
- (NCR53c7x0_memory_mapped ? \
- (unsigned int) readl(NCR53c7x0_address_memory + (address)) : \
- inl(NCR53c7x0_address_io + (address)))
-
-#define NCR53c7x0_write8(address,value) \
- (NCR53c7x0_memory_mapped ? \
- ({writeb((value), NCR53c7x0_address_memory + (address)); mb();}) : \
- outb((value), NCR53c7x0_address_io + (address)))
-
-#define NCR53c7x0_write16(address,value) \
- (NCR53c7x0_memory_mapped ? \
- ({writew((value), NCR53c7x0_address_memory + (address)); mb();}) : \
- outw((value), NCR53c7x0_address_io + (address)))
-
-#define NCR53c7x0_write32(address,value) \
- (NCR53c7x0_memory_mapped ? \
- ({writel((value), NCR53c7x0_address_memory + (address)); mb();}) : \
- outl((value), NCR53c7x0_address_io + (address)))
-
-/* Patch arbitrary 32 bit words in the script */
-#define patch_abs_32(script, offset, symbol, value) \
- for (i = 0; i < (sizeof (A_##symbol##_used) / sizeof \
- (u32)); ++i) { \
- (script)[A_##symbol##_used[i] - (offset)] += (value); \
- if (hostdata->options & OPTION_DEBUG_FIXUP) \
- printk("scsi%d : %s reference %d at 0x%x in %s is now 0x%x\n",\
- host->host_no, #symbol, i, A_##symbol##_used[i] - \
- (int)(offset), #script, (script)[A_##symbol##_used[i] - \
- (offset)]); \
- }
-
-/* Patch read/write instruction immediate field */
-#define patch_abs_rwri_data(script, offset, symbol, value) \
- for (i = 0; i < (sizeof (A_##symbol##_used) / sizeof \
- (u32)); ++i) \
- (script)[A_##symbol##_used[i] - (offset)] = \
- ((script)[A_##symbol##_used[i] - (offset)] & \
- ~DBC_RWRI_IMMEDIATE_MASK) | \
- (((value) << DBC_RWRI_IMMEDIATE_SHIFT) & \
- DBC_RWRI_IMMEDIATE_MASK)
-
-/* Patch transfer control instruction data field */
-#define patch_abs_tci_data(script, offset, symbol, value) \
- for (i = 0; i < (sizeof (A_##symbol##_used) / sizeof \
- (u32)); ++i) \
- (script)[A_##symbol##_used[i] - (offset)] = \
- ((script)[A_##symbol##_used[i] - (offset)] & \
- ~DBC_TCI_DATA_MASK) | \
- (((value) << DBC_TCI_DATA_SHIFT) & \
- DBC_TCI_DATA_MASK)
-
-/* Patch field in dsa structure (assignment should be +=?) */
-#define patch_dsa_32(dsa, symbol, word, value) \
- { \
- (dsa)[(hostdata->symbol - hostdata->dsa_start) / sizeof(u32) \
- + (word)] = (value); \
- if (hostdata->options & OPTION_DEBUG_DSA) \
- printk("scsi : dsa %s symbol %s(%d) word %d now 0x%x\n", \
- #dsa, #symbol, hostdata->symbol, \
- (word), (u32) le32_to_cpu(value)); \
- }
-
-/* Paranoid people could use panic() here. */
-#define FATAL(host) shutdown((host));
-
-#endif /* NCR53c7x0_C */
-#endif /* NCR53c7x0_H */
+++ /dev/null
-/* DO NOT EDIT - Generated automatically by script_asm.pl */
-static u32 SCRIPT[] = {
-/*
-
-
-; NCR 53c810 driver, main script
-; Sponsored by
-; iX Multiuser Multitasking Magazine
-; hm@ix.de
-;
-; Copyright 1993, 1994, 1995 Drew Eckhardt
-; Visionary Computing
-; (Unix and Linux consulting and custom programming)
-; drew@PoohSticks.ORG
-; +1 (303) 786-7975
-;
-; TolerANT and SCSI SCRIPTS are registered trademarks of NCR Corporation.
-;
-; PRE-ALPHA
-;
-; For more information, please consult
-;
-; NCR 53C810
-; PCI-SCSI I/O Processor
-; Data Manual
-;
-; NCR 53C710
-; SCSI I/O Processor
-; Programmers Guide
-;
-; NCR Microelectronics
-; 1635 Aeroplaza Drive
-; Colorado Springs, CO 80916
-; 1+ (719) 578-3400
-;
-; Toll free literature number
-; +1 (800) 334-5454
-;
-; IMPORTANT : This code is self modifying due to the limitations of
-; the NCR53c7,8xx series chips. Persons debugging this code with
-; the remote debugger should take this into account, and NOT set
-; breakpoints in modified instructions.
-;
-; Design:
-; The NCR53c7,8xx family of SCSI chips are busmasters with an onboard
-; microcontroller using a simple instruction set.
-;
-; So, to minimize the effects of interrupt latency, and to maximize
-; throughput, this driver offloads the practical maximum amount
-; of processing to the SCSI chip while still maintaining a common
-; structure.
-;
-; Where tradeoffs were needed between efficiency on the older
-; chips and the newer NCR53c800 series, the NCR53c800 series
-; was chosen.
-;
-; While the NCR53c700 and NCR53c700-66 lacked the facilities to fully
-; automate SCSI transfers without host processor intervention, this
-; isn't the case with the NCR53c710 and newer chips which allow
-;
-; - reads and writes to the internal registers from within the SCSI
-; scripts, allowing the SCSI SCRIPTS(tm) code to save processor
-; state so that multiple threads of execution are possible, and also
-; provide an ALU for loop control, etc.
-;
-; - table indirect addressing for some instructions. This allows
-; pointers to be located relative to the DSA ((Data Structure
-; Address) register.
-;
-; These features make it possible to implement a mailbox style interface,
-; where the same piece of code is run to handle I/O for multiple threads
-; at once minimizing our need to relocate code. Since the NCR53c700/
-; NCR53c800 series have a unique combination of features, making a
-; a standard ingoing/outgoing mailbox system, costly, I've modified it.
-;
-; - Mailboxes are a mixture of code and data. This lets us greatly
-; simplify the NCR53c810 code and do things that would otherwise
-; not be possible.
-;
-; The saved data pointer is now implemented as follows :
-;
-; Control flow has been architected such that if control reaches
-; munge_save_data_pointer, on a restore pointers message or
-; reconnection, a jump to the address formerly in the TEMP register
-; will allow the SCSI command to resume execution.
-;
-
-;
-; Note : the DSA structures must be aligned on 32 bit boundaries,
-; since the source and destination of MOVE MEMORY instructions
-; must share the same alignment and this is the alignment of the
-; NCR registers.
-;
-
-ABSOLUTE dsa_temp_lun = 0 ; Patch to lun for current dsa
-ABSOLUTE dsa_temp_next = 0 ; Patch to dsa next for current dsa
-ABSOLUTE dsa_temp_addr_next = 0 ; Patch to address of dsa next address
- ; for current dsa
-ABSOLUTE dsa_temp_sync = 0 ; Patch to address of per-target
- ; sync routine
-ABSOLUTE dsa_temp_target = 0 ; Patch to id for current dsa
-ABSOLUTE dsa_temp_addr_saved_pointer = 0; Patch to address of per-command
- ; saved data pointer
-ABSOLUTE dsa_temp_addr_residual = 0 ; Patch to address of per-command
- ; current residual code
-ABSOLUTE dsa_temp_addr_saved_residual = 0; Patch to address of per-command
- ; saved residual code
-ABSOLUTE dsa_temp_addr_new_value = 0 ; Address of value for JUMP operand
-ABSOLUTE dsa_temp_addr_array_value = 0 ; Address to copy to
-ABSOLUTE dsa_temp_addr_dsa_value = 0 ; Address of this DSA value
-
-;
-; Once a device has initiated reselection, we need to compare it
-; against the singly linked list of commands which have disconnected
-; and are pending reselection. These commands are maintained in
-; an unordered singly linked list of DSA structures, through the
-; DSA pointers at their 'centers' headed by the reconnect_dsa_head
-; pointer.
-;
-; To avoid complications in removing commands from the list,
-; I minimize the amount of expensive (at eight operations per
-; addition @ 500-600ns each) pointer operations which must
-; be done in the NCR driver by precomputing them on the
-; host processor during dsa structure generation.
-;
-; The fixed-up per DSA code knows how to recognize the nexus
-; associated with the corresponding SCSI command, and modifies
-; the source and destination pointers for the MOVE MEMORY
-; instruction which is executed when reselected_ok is called
-; to remove the command from the list. Similarly, DSA is
-; loaded with the address of the next DSA structure and
-; reselected_check_next is called if a failure occurs.
-;
-; Perhaps more concisely, the net effect of the mess is
-;
-; for (dsa = reconnect_dsa_head, dest = &reconnect_dsa_head,
-; src = NULL; dsa; dest = &dsa->next, dsa = dsa->next) {
-; src = &dsa->next;
-; if (target_id == dsa->id && target_lun == dsa->lun) {
-; *dest = *src;
-; break;
-; }
-; }
-;
-; if (!dsa)
-; error (int_err_unexpected_reselect);
-; else
-; longjmp (dsa->jump_resume, 0);
-;
-;
-
-
-; Define DSA structure used for mailboxes
-ENTRY dsa_code_template
-dsa_code_template:
-ENTRY dsa_code_begin
-dsa_code_begin:
- MOVE dmode_memory_to_ncr TO DMODE
-
-at 0x00000000 : */ 0x78380000,0x00000000,
-/*
- MOVE MEMORY 4, dsa_temp_addr_dsa_value, addr_scratch
-
-at 0x00000002 : */ 0xc0000004,0x00000000,0x00000000,
-/*
- MOVE dmode_memory_to_memory TO DMODE
-
-at 0x00000005 : */ 0x78380000,0x00000000,
-/*
- CALL scratch_to_dsa
-
-at 0x00000007 : */ 0x88080000,0x00000980,
-/*
- CALL select
-
-at 0x00000009 : */ 0x88080000,0x000001fc,
-/*
-; Handle the phase mismatch which may have resulted from the
-; MOVE FROM dsa_msgout if we returned here. The CLEAR ATN
-; may or may not be necessary, and we should update script_asm.pl
-; to handle multiple pieces.
- CLEAR ATN
-
-at 0x0000000b : */ 0x60000008,0x00000000,
-/*
- CLEAR ACK
-
-at 0x0000000d : */ 0x60000040,0x00000000,
-/*
-
-; Replace second operand with address of JUMP instruction dest operand
-; in schedule table for this DSA. Becomes dsa_jump_dest in 53c7,8xx.c.
-ENTRY dsa_code_fix_jump
-dsa_code_fix_jump:
- MOVE MEMORY 4, NOP_insn, 0
-
-at 0x0000000f : */ 0xc0000004,0x00000000,0x00000000,
-/*
- JUMP select_done
-
-at 0x00000012 : */ 0x80080000,0x00000224,
-/*
-
-; wrong_dsa loads the DSA register with the value of the dsa_next
-; field.
-;
-wrong_dsa:
-; Patch the MOVE MEMORY INSTRUCTION such that
-; the destination address is the address of the OLD
-; next pointer.
-;
- MOVE MEMORY 4, dsa_temp_addr_next, reselected_ok + 8
-
-at 0x00000014 : */ 0xc0000004,0x00000000,0x00000758,
-/*
- MOVE dmode_memory_to_ncr TO DMODE
-
-at 0x00000017 : */ 0x78380000,0x00000000,
-/*
-;
-; Move the _contents_ of the next pointer into the DSA register as
-; the next I_T_L or I_T_L_Q tupple to check against the established
-; nexus.
-;
- MOVE MEMORY 4, dsa_temp_next, addr_scratch
-
-at 0x00000019 : */ 0xc0000004,0x00000000,0x00000000,
-/*
- MOVE dmode_memory_to_memory TO DMODE
-
-at 0x0000001c : */ 0x78380000,0x00000000,
-/*
- CALL scratch_to_dsa
-
-at 0x0000001e : */ 0x88080000,0x00000980,
-/*
- JUMP reselected_check_next
-
-at 0x00000020 : */ 0x80080000,0x000006a4,
-/*
-
-ABSOLUTE dsa_save_data_pointer = 0
-ENTRY dsa_code_save_data_pointer
-dsa_code_save_data_pointer:
- MOVE dmode_ncr_to_memory TO DMODE
-
-at 0x00000022 : */ 0x78380000,0x00000000,
-/*
- MOVE MEMORY 4, addr_temp, dsa_temp_addr_saved_pointer
-
-at 0x00000024 : */ 0xc0000004,0x00000000,0x00000000,
-/*
- MOVE dmode_memory_to_memory TO DMODE
-
-at 0x00000027 : */ 0x78380000,0x00000000,
-/*
-; HARD CODED : 24 bytes needs to agree with 53c7,8xx.h
- MOVE MEMORY 24, dsa_temp_addr_residual, dsa_temp_addr_saved_residual
-
-at 0x00000029 : */ 0xc0000018,0x00000000,0x00000000,
-/*
- CLEAR ACK
-
-at 0x0000002c : */ 0x60000040,0x00000000,
-/*
-
-
-
- RETURN
-
-at 0x0000002e : */ 0x90080000,0x00000000,
-/*
-ABSOLUTE dsa_restore_pointers = 0
-ENTRY dsa_code_restore_pointers
-dsa_code_restore_pointers:
- MOVE dmode_memory_to_ncr TO DMODE
-
-at 0x00000030 : */ 0x78380000,0x00000000,
-/*
- MOVE MEMORY 4, dsa_temp_addr_saved_pointer, addr_temp
-
-at 0x00000032 : */ 0xc0000004,0x00000000,0x00000000,
-/*
- MOVE dmode_memory_to_memory TO DMODE
-
-at 0x00000035 : */ 0x78380000,0x00000000,
-/*
-; HARD CODED : 24 bytes needs to agree with 53c7,8xx.h
- MOVE MEMORY 24, dsa_temp_addr_saved_residual, dsa_temp_addr_residual
-
-at 0x00000037 : */ 0xc0000018,0x00000000,0x00000000,
-/*
- CLEAR ACK
-
-at 0x0000003a : */ 0x60000040,0x00000000,
-/*
-
-
-
- RETURN
-
-at 0x0000003c : */ 0x90080000,0x00000000,
-/*
-
-ABSOLUTE dsa_check_reselect = 0
-; dsa_check_reselect determines whether or not the current target and
-; lun match the current DSA
-ENTRY dsa_code_check_reselect
-dsa_code_check_reselect:
- MOVE SSID TO SFBR ; SSID contains 3 bit target ID
-
-at 0x0000003e : */ 0x720a0000,0x00000000,
-/*
-; FIXME : we need to accommodate bit fielded and binary here for '7xx/'8xx chips
- JUMP REL (wrong_dsa), IF NOT dsa_temp_target, AND MASK 0xf8
-
-at 0x00000040 : */ 0x8084f800,0x00ffff48,
-/*
-;
-; Hack - move to scratch first, since SFBR is not writeable
-; via the CPU and hence a MOVE MEMORY instruction.
-;
- MOVE dmode_memory_to_ncr TO DMODE
-
-at 0x00000042 : */ 0x78380000,0x00000000,
-/*
- MOVE MEMORY 1, reselected_identify, addr_scratch
-
-at 0x00000044 : */ 0xc0000001,0x00000000,0x00000000,
-/*
- MOVE dmode_memory_to_memory TO DMODE
-
-at 0x00000047 : */ 0x78380000,0x00000000,
-/*
- MOVE SCRATCH0 TO SFBR
-
-at 0x00000049 : */ 0x72340000,0x00000000,
-/*
-; FIXME : we need to accommodate bit fielded and binary here for '7xx/'8xx chips
- JUMP REL (wrong_dsa), IF NOT dsa_temp_lun, AND MASK 0xf8
-
-at 0x0000004b : */ 0x8084f800,0x00ffff1c,
-/*
-; Patch the MOVE MEMORY INSTRUCTION such that
-; the source address is the address of this dsa's
-; next pointer.
- MOVE MEMORY 4, dsa_temp_addr_next, reselected_ok + 4
-
-at 0x0000004d : */ 0xc0000004,0x00000000,0x00000754,
-/*
- CALL reselected_ok
-
-at 0x00000050 : */ 0x88080000,0x00000750,
-/*
- CALL dsa_temp_sync
-
-at 0x00000052 : */ 0x88080000,0x00000000,
-/*
-; Release ACK on the IDENTIFY message _after_ we've set the synchronous
-; transfer parameters!
- CLEAR ACK
-
-at 0x00000054 : */ 0x60000040,0x00000000,
-/*
-; Implicitly restore pointers on reselection, so a RETURN
-; will transfer control back to the right spot.
- CALL REL (dsa_code_restore_pointers)
-
-at 0x00000056 : */ 0x88880000,0x00ffff60,
-/*
- RETURN
-
-at 0x00000058 : */ 0x90080000,0x00000000,
-/*
-ENTRY dsa_zero
-dsa_zero:
-ENTRY dsa_code_template_end
-dsa_code_template_end:
-
-; Perform sanity check for dsa_fields_start == dsa_code_template_end -
-; dsa_zero, puke.
-
-ABSOLUTE dsa_fields_start = 0 ; Sanity marker
- ; pad 48 bytes (fix this RSN)
-ABSOLUTE dsa_next = 48 ; len 4 Next DSA
- ; del 4 Previous DSA address
-ABSOLUTE dsa_cmnd = 56 ; len 4 Scsi_Cmnd * for this thread.
-ABSOLUTE dsa_select = 60 ; len 4 Device ID, Period, Offset for
- ; table indirect select
-ABSOLUTE dsa_msgout = 64 ; len 8 table indirect move parameter for
- ; select message
-ABSOLUTE dsa_cmdout = 72 ; len 8 table indirect move parameter for
- ; command
-ABSOLUTE dsa_dataout = 80 ; len 4 code pointer for dataout
-ABSOLUTE dsa_datain = 84 ; len 4 code pointer for datain
-ABSOLUTE dsa_msgin = 88 ; len 8 table indirect move for msgin
-ABSOLUTE dsa_status = 96 ; len 8 table indirect move for status byte
-ABSOLUTE dsa_msgout_other = 104 ; len 8 table indirect for normal message out
- ; (Synchronous transfer negotiation, etc).
-ABSOLUTE dsa_end = 112
-
-ABSOLUTE schedule = 0 ; Array of JUMP dsa_begin or JUMP (next),
- ; terminated by a call to JUMP wait_reselect
-
-; Linked lists of DSA structures
-ABSOLUTE reconnect_dsa_head = 0 ; Link list of DSAs which can reconnect
-ABSOLUTE addr_reconnect_dsa_head = 0 ; Address of variable containing
- ; address of reconnect_dsa_head
-
-; These select the source and destination of a MOVE MEMORY instruction
-ABSOLUTE dmode_memory_to_memory = 0x0
-ABSOLUTE dmode_memory_to_ncr = 0x0
-ABSOLUTE dmode_ncr_to_memory = 0x0
-
-ABSOLUTE addr_scratch = 0x0
-ABSOLUTE addr_temp = 0x0
-
-
-; Interrupts -
-; MSB indicates type
-; 0 handle error condition
-; 1 handle message
-; 2 handle normal condition
-; 3 debugging interrupt
-; 4 testing interrupt
-; Next byte indicates specific error
-
-; XXX not yet implemented, I'm not sure if I want to -
-; Next byte indicates the routine the error occurred in
-; The LSB indicates the specific place the error occurred
-
-ABSOLUTE int_err_unexpected_phase = 0x00000000 ; Unexpected phase encountered
-ABSOLUTE int_err_selected = 0x00010000 ; SELECTED (nee RESELECTED)
-ABSOLUTE int_err_unexpected_reselect = 0x00020000
-ABSOLUTE int_err_check_condition = 0x00030000
-ABSOLUTE int_err_no_phase = 0x00040000
-ABSOLUTE int_msg_wdtr = 0x01000000 ; WDTR message received
-ABSOLUTE int_msg_sdtr = 0x01010000 ; SDTR received
-ABSOLUTE int_msg_1 = 0x01020000 ; single byte special message
- ; received
-
-ABSOLUTE int_norm_select_complete = 0x02000000 ; Select complete, reprogram
- ; registers.
-ABSOLUTE int_norm_reselect_complete = 0x02010000 ; Nexus established
-ABSOLUTE int_norm_command_complete = 0x02020000 ; Command complete
-ABSOLUTE int_norm_disconnected = 0x02030000 ; Disconnected
-ABSOLUTE int_norm_aborted =0x02040000 ; Aborted *dsa
-ABSOLUTE int_norm_reset = 0x02050000 ; Generated BUS reset.
-ABSOLUTE int_debug_break = 0x03000000 ; Break point
-
-ABSOLUTE int_debug_panic = 0x030b0000 ; Panic driver
-
-
-ABSOLUTE int_test_1 = 0x04000000 ; Test 1 complete
-ABSOLUTE int_test_2 = 0x04010000 ; Test 2 complete
-ABSOLUTE int_test_3 = 0x04020000 ; Test 3 complete
-
-
-; These should start with 0x05000000, with low bits incrementing for
-; each one.
-
-
-
-ABSOLUTE NCR53c7xx_msg_abort = 0 ; Pointer to abort message
-ABSOLUTE NCR53c7xx_msg_reject = 0 ; Pointer to reject message
-ABSOLUTE NCR53c7xx_zero = 0 ; long with zero in it, use for source
-ABSOLUTE NCR53c7xx_sink = 0 ; long to dump worthless data in
-ABSOLUTE NOP_insn = 0 ; NOP instruction
-
-; Pointer to message, potentially multi-byte
-ABSOLUTE msg_buf = 0
-
-; Pointer to holding area for reselection information
-ABSOLUTE reselected_identify = 0
-ABSOLUTE reselected_tag = 0
-
-; Request sense command pointer, it's a 6 byte command, should
-; be constant for all commands since we always want 16 bytes of
-; sense and we don't need to change any fields as we did under
-; SCSI-I when we actually cared about the LUN field.
-;EXTERNAL NCR53c7xx_sense ; Request sense command
-
-
-; dsa_schedule
-; PURPOSE : after a DISCONNECT message has been received, and pointers
-; saved, insert the current DSA structure at the head of the
-; disconnected queue and fall through to the scheduler.
-;
-; CALLS : OK
-;
-; INPUTS : dsa - current DSA structure, reconnect_dsa_head - list
-; of disconnected commands
-;
-; MODIFIES : SCRATCH, reconnect_dsa_head
-;
-; EXITS : always passes control to schedule
-
-ENTRY dsa_schedule
-dsa_schedule:
-
-
-
-
-;
-; Calculate the address of the next pointer within the DSA
-; structure of the command that is currently disconnecting
-;
- CALL dsa_to_scratch
-
-at 0x0000005a : */ 0x88080000,0x00000938,
-/*
- MOVE SCRATCH0 + dsa_next TO SCRATCH0
-
-at 0x0000005c : */ 0x7e343000,0x00000000,
-/*
- MOVE SCRATCH1 + 0 TO SCRATCH1 WITH CARRY
-
-at 0x0000005e : */ 0x7f350000,0x00000000,
-/*
- MOVE SCRATCH2 + 0 TO SCRATCH2 WITH CARRY
-
-at 0x00000060 : */ 0x7f360000,0x00000000,
-/*
- MOVE SCRATCH3 + 0 TO SCRATCH3 WITH CARRY
-
-at 0x00000062 : */ 0x7f370000,0x00000000,
-/*
-
-; Point the next field of this DSA structure at the current disconnected
-; list
- MOVE dmode_ncr_to_memory TO DMODE
-
-at 0x00000064 : */ 0x78380000,0x00000000,
-/*
- MOVE MEMORY 4, addr_scratch, dsa_schedule_insert + 8
-
-at 0x00000066 : */ 0xc0000004,0x00000000,0x000001b4,
-/*
- MOVE dmode_memory_to_memory TO DMODE
-
-at 0x00000069 : */ 0x78380000,0x00000000,
-/*
-dsa_schedule_insert:
- MOVE MEMORY 4, reconnect_dsa_head, 0
-
-at 0x0000006b : */ 0xc0000004,0x00000000,0x00000000,
-/*
-
-; And update the head pointer.
- CALL dsa_to_scratch
-
-at 0x0000006e : */ 0x88080000,0x00000938,
-/*
- MOVE dmode_ncr_to_memory TO DMODE
-
-at 0x00000070 : */ 0x78380000,0x00000000,
-/*
- MOVE MEMORY 4, addr_scratch, reconnect_dsa_head
-
-at 0x00000072 : */ 0xc0000004,0x00000000,0x00000000,
-/*
- MOVE dmode_memory_to_memory TO DMODE
-
-at 0x00000075 : */ 0x78380000,0x00000000,
-/*
-
-
- MOVE SCNTL2 & 0x7f TO SCNTL2
-
-at 0x00000077 : */ 0x7c027f00,0x00000000,
-/*
- CLEAR ACK
-
-at 0x00000079 : */ 0x60000040,0x00000000,
-/*
-
- WAIT DISCONNECT
-
-at 0x0000007b : */ 0x48000000,0x00000000,
-/*
-
-
-
-
-
-
- JUMP schedule
-
-at 0x0000007d : */ 0x80080000,0x00000000,
-/*
-
-
-;
-; select
-;
-; PURPOSE : establish a nexus for the SCSI command referenced by DSA.
-; On success, the current DSA structure is removed from the issue
-; queue. Usually, this is entered as a fall-through from schedule,
-; although the contingent allegiance handling code will write
-; the select entry address to the DSP to restart a command as a
-; REQUEST SENSE. A message is sent (usually IDENTIFY, although
-; additional SDTR or WDTR messages may be sent). COMMAND OUT
-; is handled.
-;
-; INPUTS : DSA - SCSI command, issue_dsa_head
-;
-; CALLS : NOT OK
-;
-; MODIFIES : SCRATCH, issue_dsa_head
-;
-; EXITS : on reselection or selection, go to select_failed
-; otherwise, RETURN so control is passed back to
-; dsa_begin.
-;
-
-ENTRY select
-select:
-
-
-
-
-
-
-
-
-
-
-
-
- CLEAR TARGET
-
-at 0x0000007f : */ 0x60000200,0x00000000,
-/*
-
-; XXX
-;
-; In effect, SELECTION operations are backgrounded, with execution
-; continuing until code which waits for REQ or a fatal interrupt is
-; encountered.
-;
-; So, for more performance, we could overlap the code which removes
-; the command from the NCRs issue queue with the selection, but
-; at this point I don't want to deal with the error recovery.
-;
-
-
- SELECT ATN FROM dsa_select, select_failed
-
-at 0x00000081 : */ 0x4300003c,0x000007a4,
-/*
- JUMP select_msgout, WHEN MSG_OUT
-
-at 0x00000083 : */ 0x860b0000,0x00000214,
-/*
-ENTRY select_msgout
-select_msgout:
- MOVE FROM dsa_msgout, WHEN MSG_OUT
-
-at 0x00000085 : */ 0x1e000000,0x00000040,
-/*
-
-
-
-
-
-
-
-
-
-
- RETURN
-
-at 0x00000087 : */ 0x90080000,0x00000000,
-/*
-
-;
-; select_done
-;
-; PURPOSE: continue on to normal data transfer; called as the exit
-; point from dsa_begin.
-;
-; INPUTS: dsa
-;
-; CALLS: OK
-;
-;
-
-select_done:
-
-
-
-
-
-
-
-; After a successful selection, we should get either a CMD phase or
-; some transfer request negotiation message.
-
- JUMP cmdout, WHEN CMD
-
-at 0x00000089 : */ 0x820b0000,0x00000244,
-/*
- INT int_err_unexpected_phase, WHEN NOT MSG_IN
-
-at 0x0000008b : */ 0x9f030000,0x00000000,
-/*
-
-select_msg_in:
- CALL msg_in, WHEN MSG_IN
-
-at 0x0000008d : */ 0x8f0b0000,0x00000404,
-/*
- JUMP select_msg_in, WHEN MSG_IN
-
-at 0x0000008f : */ 0x870b0000,0x00000234,
-/*
-
-cmdout:
- INT int_err_unexpected_phase, WHEN NOT CMD
-
-at 0x00000091 : */ 0x9a030000,0x00000000,
-/*
-
-
-
-ENTRY cmdout_cmdout
-cmdout_cmdout:
-
- MOVE FROM dsa_cmdout, WHEN CMD
-
-at 0x00000093 : */ 0x1a000000,0x00000048,
-/*
-
-
-
-
-;
-; data_transfer
-; other_out
-; other_in
-; other_transfer
-;
-; PURPOSE : handle the main data transfer for a SCSI command in
-; several parts. In the first part, data_transfer, DATA_IN
-; and DATA_OUT phases are allowed, with the user provided
-; code (usually dynamically generated based on the scatter/gather
-; list associated with a SCSI command) called to handle these
-; phases.
-;
-; After control has passed to one of the user provided
-; DATA_IN or DATA_OUT routines, back calls are made to
-; other_transfer_in or other_transfer_out to handle non-DATA IN
-; and DATA OUT phases respectively, with the state of the active
-; data pointer being preserved in TEMP.
-;
-; On completion, the user code passes control to other_transfer
-; which causes DATA_IN and DATA_OUT to result in unexpected_phase
-; interrupts so that data overruns may be trapped.
-;
-; INPUTS : DSA - SCSI command
-;
-; CALLS : OK in data_transfer_start, not ok in other_out and other_in, ok in
-; other_transfer
-;
-; MODIFIES : SCRATCH
-;
-; EXITS : if STATUS IN is detected, signifying command completion,
-; the NCR jumps to command_complete. If MSG IN occurs, a
-; CALL is made to msg_in. Otherwise, other_transfer runs in
-; an infinite loop.
-;
-
-ENTRY data_transfer
-data_transfer:
- JUMP cmdout_cmdout, WHEN CMD
-
-at 0x00000095 : */ 0x820b0000,0x0000024c,
-/*
- CALL msg_in, WHEN MSG_IN
-
-at 0x00000097 : */ 0x8f0b0000,0x00000404,
-/*
- INT int_err_unexpected_phase, WHEN MSG_OUT
-
-at 0x00000099 : */ 0x9e0b0000,0x00000000,
-/*
- JUMP do_dataout, WHEN DATA_OUT
-
-at 0x0000009b : */ 0x800b0000,0x0000028c,
-/*
- JUMP do_datain, WHEN DATA_IN
-
-at 0x0000009d : */ 0x810b0000,0x000002e4,
-/*
- JUMP command_complete, WHEN STATUS
-
-at 0x0000009f : */ 0x830b0000,0x0000060c,
-/*
- JUMP data_transfer
-
-at 0x000000a1 : */ 0x80080000,0x00000254,
-/*
-ENTRY end_data_transfer
-end_data_transfer:
-
-;
-; FIXME: On NCR53c700 and NCR53c700-66 chips, do_dataout/do_datain
-; should be fixed up whenever the nexus changes so it can point to the
-; correct routine for that command.
-;
-
-
-; Nasty jump to dsa->dataout
-do_dataout:
- CALL dsa_to_scratch
-
-at 0x000000a3 : */ 0x88080000,0x00000938,
-/*
- MOVE SCRATCH0 + dsa_dataout TO SCRATCH0
-
-at 0x000000a5 : */ 0x7e345000,0x00000000,
-/*
- MOVE SCRATCH1 + 0 TO SCRATCH1 WITH CARRY
-
-at 0x000000a7 : */ 0x7f350000,0x00000000,
-/*
- MOVE SCRATCH2 + 0 TO SCRATCH2 WITH CARRY
-
-at 0x000000a9 : */ 0x7f360000,0x00000000,
-/*
- MOVE SCRATCH3 + 0 TO SCRATCH3 WITH CARRY
-
-at 0x000000ab : */ 0x7f370000,0x00000000,
-/*
- MOVE dmode_ncr_to_memory TO DMODE
-
-at 0x000000ad : */ 0x78380000,0x00000000,
-/*
- MOVE MEMORY 4, addr_scratch, dataout_to_jump + 4
-
-at 0x000000af : */ 0xc0000004,0x00000000,0x000002d4,
-/*
- MOVE dmode_memory_to_memory TO DMODE
-
-at 0x000000b2 : */ 0x78380000,0x00000000,
-/*
-dataout_to_jump:
- MOVE MEMORY 4, 0, dataout_jump + 4
-
-at 0x000000b4 : */ 0xc0000004,0x00000000,0x000002e0,
-/*
-dataout_jump:
- JUMP 0
-
-at 0x000000b7 : */ 0x80080000,0x00000000,
-/*
-
-; Nasty jump to dsa->dsain
-do_datain:
- CALL dsa_to_scratch
-
-at 0x000000b9 : */ 0x88080000,0x00000938,
-/*
- MOVE SCRATCH0 + dsa_datain TO SCRATCH0
-
-at 0x000000bb : */ 0x7e345400,0x00000000,
-/*
- MOVE SCRATCH1 + 0 TO SCRATCH1 WITH CARRY
-
-at 0x000000bd : */ 0x7f350000,0x00000000,
-/*
- MOVE SCRATCH2 + 0 TO SCRATCH2 WITH CARRY
-
-at 0x000000bf : */ 0x7f360000,0x00000000,
-/*
- MOVE SCRATCH3 + 0 TO SCRATCH3 WITH CARRY
-
-at 0x000000c1 : */ 0x7f370000,0x00000000,
-/*
- MOVE dmode_ncr_to_memory TO DMODE
-
-at 0x000000c3 : */ 0x78380000,0x00000000,
-/*
- MOVE MEMORY 4, addr_scratch, datain_to_jump + 4
-
-at 0x000000c5 : */ 0xc0000004,0x00000000,0x0000032c,
-/*
- MOVE dmode_memory_to_memory TO DMODE
-
-at 0x000000c8 : */ 0x78380000,0x00000000,
-/*
-ENTRY datain_to_jump
-datain_to_jump:
- MOVE MEMORY 4, 0, datain_jump + 4
-
-at 0x000000ca : */ 0xc0000004,0x00000000,0x00000338,
-/*
-
-
-
-datain_jump:
- JUMP 0
-
-at 0x000000cd : */ 0x80080000,0x00000000,
-/*
-
-
-
-; Note that other_out and other_in loop until a non-data phase
-; is discovered, so we only execute return statements when we
-; can go on to the next data phase block move statement.
-
-ENTRY other_out
-other_out:
-
-
-
- INT int_err_unexpected_phase, WHEN CMD
-
-at 0x000000cf : */ 0x9a0b0000,0x00000000,
-/*
- JUMP msg_in_restart, WHEN MSG_IN
-
-at 0x000000d1 : */ 0x870b0000,0x000003e4,
-/*
- INT int_err_unexpected_phase, WHEN MSG_OUT
-
-at 0x000000d3 : */ 0x9e0b0000,0x00000000,
-/*
- INT int_err_unexpected_phase, WHEN DATA_IN
-
-at 0x000000d5 : */ 0x990b0000,0x00000000,
-/*
- JUMP command_complete, WHEN STATUS
-
-at 0x000000d7 : */ 0x830b0000,0x0000060c,
-/*
- JUMP other_out, WHEN NOT DATA_OUT
-
-at 0x000000d9 : */ 0x80030000,0x0000033c,
-/*
- RETURN
-
-at 0x000000db : */ 0x90080000,0x00000000,
-/*
-
-ENTRY other_in
-other_in:
-
-
-
- INT int_err_unexpected_phase, WHEN CMD
-
-at 0x000000dd : */ 0x9a0b0000,0x00000000,
-/*
- JUMP msg_in_restart, WHEN MSG_IN
-
-at 0x000000df : */ 0x870b0000,0x000003e4,
-/*
- INT int_err_unexpected_phase, WHEN MSG_OUT
-
-at 0x000000e1 : */ 0x9e0b0000,0x00000000,
-/*
- INT int_err_unexpected_phase, WHEN DATA_OUT
-
-at 0x000000e3 : */ 0x980b0000,0x00000000,
-/*
- JUMP command_complete, WHEN STATUS
-
-at 0x000000e5 : */ 0x830b0000,0x0000060c,
-/*
- JUMP other_in, WHEN NOT DATA_IN
-
-at 0x000000e7 : */ 0x81030000,0x00000374,
-/*
- RETURN
-
-at 0x000000e9 : */ 0x90080000,0x00000000,
-/*
-
-
-ENTRY other_transfer
-other_transfer:
- INT int_err_unexpected_phase, WHEN CMD
-
-at 0x000000eb : */ 0x9a0b0000,0x00000000,
-/*
- CALL msg_in, WHEN MSG_IN
-
-at 0x000000ed : */ 0x8f0b0000,0x00000404,
-/*
- INT int_err_unexpected_phase, WHEN MSG_OUT
-
-at 0x000000ef : */ 0x9e0b0000,0x00000000,
-/*
- INT int_err_unexpected_phase, WHEN DATA_OUT
-
-at 0x000000f1 : */ 0x980b0000,0x00000000,
-/*
- INT int_err_unexpected_phase, WHEN DATA_IN
-
-at 0x000000f3 : */ 0x990b0000,0x00000000,
-/*
- JUMP command_complete, WHEN STATUS
-
-at 0x000000f5 : */ 0x830b0000,0x0000060c,
-/*
- JUMP other_transfer
-
-at 0x000000f7 : */ 0x80080000,0x000003ac,
-/*
-
-;
-; msg_in_restart
-; msg_in
-; munge_msg
-;
-; PURPOSE : process messages from a target. msg_in is called when the
-; caller hasn't read the first byte of the message. munge_message
-; is called when the caller has read the first byte of the message,
-; and left it in SFBR. msg_in_restart is called when the caller
-; hasn't read the first byte of the message, and wishes RETURN
-; to transfer control back to the address of the conditional
-; CALL instruction rather than to the instruction after it.
-;
-; Various int_* interrupts are generated when the host system
-; needs to intervene, as is the case with SDTR, WDTR, and
-; INITIATE RECOVERY messages.
-;
-; When the host system handles one of these interrupts,
-; it can respond by reentering at reject_message,
-; which rejects the message and returns control to
-; the caller of msg_in or munge_msg, accept_message
-; which clears ACK and returns control, or reply_message
-; which sends the message pointed to by the DSA
-; msgout_other table indirect field.
-;
-; DISCONNECT messages are handled by moving the command
-; to the reconnect_dsa_queue.
-;
-; INPUTS : DSA - SCSI COMMAND, SFBR - first byte of message (munge_msg
-; only)
-;
-; CALLS : NO. The TEMP register isn't backed up to allow nested calls.
-;
-; MODIFIES : SCRATCH, DSA on DISCONNECT
-;
-; EXITS : On receipt of SAVE DATA POINTER, RESTORE POINTERS,
-; and normal return from message handlers running under
-; Linux, control is returned to the caller. Receipt
-; of DISCONNECT messages pass control to dsa_schedule.
-;
-ENTRY msg_in_restart
-msg_in_restart:
-; XXX - hackish
-;
-; Since it's easier to debug changes to the statically
-; compiled code, rather than the dynamically generated
-; stuff, such as
-;
-; MOVE x, y, WHEN data_phase
-; CALL other_z, WHEN NOT data_phase
-; MOVE x, y, WHEN data_phase
-;
-; I'd like to have certain routines (notably the message handler)
-; restart on the conditional call rather than the next instruction.
-;
-; So, subtract 8 from the return address
-
- MOVE TEMP0 + 0xf8 TO TEMP0
-
-at 0x000000f9 : */ 0x7e1cf800,0x00000000,
-/*
- MOVE TEMP1 + 0xff TO TEMP1 WITH CARRY
-
-at 0x000000fb : */ 0x7f1dff00,0x00000000,
-/*
- MOVE TEMP2 + 0xff TO TEMP2 WITH CARRY
-
-at 0x000000fd : */ 0x7f1eff00,0x00000000,
-/*
- MOVE TEMP3 + 0xff TO TEMP3 WITH CARRY
-
-at 0x000000ff : */ 0x7f1fff00,0x00000000,
-/*
-
-ENTRY msg_in
-msg_in:
- MOVE 1, msg_buf, WHEN MSG_IN
-
-at 0x00000101 : */ 0x0f000001,0x00000000,
-/*
-
-munge_msg:
- JUMP munge_extended, IF 0x01 ; EXTENDED MESSAGE
-
-at 0x00000103 : */ 0x800c0001,0x00000524,
-/*
- JUMP munge_2, IF 0x20, AND MASK 0xdf ; two byte message
-
-at 0x00000105 : */ 0x800cdf20,0x0000044c,
-/*
-;
-; XXX - I've seen a handful of broken SCSI devices which fail to issue
-; a SAVE POINTERS message before disconnecting in the middle of
-; a transfer, assuming that the DATA POINTER will be implicitly
-; restored.
-;
-; Historically, I've often done an implicit save when the DISCONNECT
-; message is processed. We may want to consider having the option of
-; doing that here.
-;
- JUMP munge_save_data_pointer, IF 0x02 ; SAVE DATA POINTER
-
-at 0x00000107 : */ 0x800c0002,0x00000454,
-/*
- JUMP munge_restore_pointers, IF 0x03 ; RESTORE POINTERS
-
-at 0x00000109 : */ 0x800c0003,0x000004b8,
-/*
- JUMP munge_disconnect, IF 0x04 ; DISCONNECT
-
-at 0x0000010b : */ 0x800c0004,0x0000051c,
-/*
- INT int_msg_1, IF 0x07 ; MESSAGE REJECT
-
-at 0x0000010d : */ 0x980c0007,0x01020000,
-/*
- INT int_msg_1, IF 0x0f ; INITIATE RECOVERY
-
-at 0x0000010f : */ 0x980c000f,0x01020000,
-/*
-
-
-
- JUMP reject_message
-
-at 0x00000111 : */ 0x80080000,0x000005b4,
-/*
-
-munge_2:
- JUMP reject_message
-
-at 0x00000113 : */ 0x80080000,0x000005b4,
-/*
-;
-; The SCSI standard allows targets to recover from transient
-; error conditions by backing up the data pointer with a
-; RESTORE POINTERS message.
-;
-; So, we must save and restore the _residual_ code as well as
-; the current instruction pointer. Because of this messiness,
-; it is simpler to put dynamic code in the dsa for this and to
-; just do a simple jump down there.
-;
-
-munge_save_data_pointer:
- MOVE DSA0 + dsa_save_data_pointer TO SFBR
-
-at 0x00000115 : */ 0x76100000,0x00000000,
-/*
- MOVE SFBR TO SCRATCH0
-
-at 0x00000117 : */ 0x6a340000,0x00000000,
-/*
- MOVE DSA1 + 0xff TO SFBR WITH CARRY
-
-at 0x00000119 : */ 0x7711ff00,0x00000000,
-/*
- MOVE SFBR TO SCRATCH1
-
-at 0x0000011b : */ 0x6a350000,0x00000000,
-/*
- MOVE DSA2 + 0xff TO SFBR WITH CARRY
-
-at 0x0000011d : */ 0x7712ff00,0x00000000,
-/*
- MOVE SFBR TO SCRATCH2
-
-at 0x0000011f : */ 0x6a360000,0x00000000,
-/*
- MOVE DSA3 + 0xff TO SFBR WITH CARRY
-
-at 0x00000121 : */ 0x7713ff00,0x00000000,
-/*
- MOVE SFBR TO SCRATCH3
-
-at 0x00000123 : */ 0x6a370000,0x00000000,
-/*
-
- MOVE dmode_ncr_to_memory TO DMODE
-
-at 0x00000125 : */ 0x78380000,0x00000000,
-/*
- MOVE MEMORY 4, addr_scratch, jump_dsa_save + 4
-
-at 0x00000127 : */ 0xc0000004,0x00000000,0x000004b4,
-/*
- MOVE dmode_memory_to_memory TO DMODE
-
-at 0x0000012a : */ 0x78380000,0x00000000,
-/*
-jump_dsa_save:
- JUMP 0
-
-at 0x0000012c : */ 0x80080000,0x00000000,
-/*
-
-munge_restore_pointers:
- MOVE DSA0 + dsa_restore_pointers TO SFBR
-
-at 0x0000012e : */ 0x76100000,0x00000000,
-/*
- MOVE SFBR TO SCRATCH0
-
-at 0x00000130 : */ 0x6a340000,0x00000000,
-/*
- MOVE DSA1 + 0xff TO SFBR WITH CARRY
-
-at 0x00000132 : */ 0x7711ff00,0x00000000,
-/*
- MOVE SFBR TO SCRATCH1
-
-at 0x00000134 : */ 0x6a350000,0x00000000,
-/*
- MOVE DSA2 + 0xff TO SFBR WITH CARRY
-
-at 0x00000136 : */ 0x7712ff00,0x00000000,
-/*
- MOVE SFBR TO SCRATCH2
-
-at 0x00000138 : */ 0x6a360000,0x00000000,
-/*
- MOVE DSA3 + 0xff TO SFBR WITH CARRY
-
-at 0x0000013a : */ 0x7713ff00,0x00000000,
-/*
- MOVE SFBR TO SCRATCH3
-
-at 0x0000013c : */ 0x6a370000,0x00000000,
-/*
-
- MOVE dmode_ncr_to_memory TO DMODE
-
-at 0x0000013e : */ 0x78380000,0x00000000,
-/*
- MOVE MEMORY 4, addr_scratch, jump_dsa_restore + 4
-
-at 0x00000140 : */ 0xc0000004,0x00000000,0x00000518,
-/*
- MOVE dmode_memory_to_memory TO DMODE
-
-at 0x00000143 : */ 0x78380000,0x00000000,
-/*
-jump_dsa_restore:
- JUMP 0
-
-at 0x00000145 : */ 0x80080000,0x00000000,
-/*
-
-
-munge_disconnect:
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
- JUMP dsa_schedule
-
-at 0x00000147 : */ 0x80080000,0x00000168,
-/*
-
-
-
-
-
-munge_extended:
- CLEAR ACK
-
-at 0x00000149 : */ 0x60000040,0x00000000,
-/*
- INT int_err_unexpected_phase, WHEN NOT MSG_IN
-
-at 0x0000014b : */ 0x9f030000,0x00000000,
-/*
- MOVE 1, msg_buf + 1, WHEN MSG_IN
-
-at 0x0000014d : */ 0x0f000001,0x00000001,
-/*
- JUMP munge_extended_2, IF 0x02
-
-at 0x0000014f : */ 0x800c0002,0x00000554,
-/*
- JUMP munge_extended_3, IF 0x03
-
-at 0x00000151 : */ 0x800c0003,0x00000584,
-/*
- JUMP reject_message
-
-at 0x00000153 : */ 0x80080000,0x000005b4,
-/*
-
-munge_extended_2:
- CLEAR ACK
-
-at 0x00000155 : */ 0x60000040,0x00000000,
-/*
- MOVE 1, msg_buf + 2, WHEN MSG_IN
-
-at 0x00000157 : */ 0x0f000001,0x00000002,
-/*
- JUMP reject_message, IF NOT 0x02 ; Must be WDTR
-
-at 0x00000159 : */ 0x80040002,0x000005b4,
-/*
- CLEAR ACK
-
-at 0x0000015b : */ 0x60000040,0x00000000,
-/*
- MOVE 1, msg_buf + 3, WHEN MSG_IN
-
-at 0x0000015d : */ 0x0f000001,0x00000003,
-/*
- INT int_msg_wdtr
-
-at 0x0000015f : */ 0x98080000,0x01000000,
-/*
-
-munge_extended_3:
- CLEAR ACK
-
-at 0x00000161 : */ 0x60000040,0x00000000,
-/*
- MOVE 1, msg_buf + 2, WHEN MSG_IN
-
-at 0x00000163 : */ 0x0f000001,0x00000002,
-/*
- JUMP reject_message, IF NOT 0x01 ; Must be SDTR
-
-at 0x00000165 : */ 0x80040001,0x000005b4,
-/*
- CLEAR ACK
-
-at 0x00000167 : */ 0x60000040,0x00000000,
-/*
- MOVE 2, msg_buf + 3, WHEN MSG_IN
-
-at 0x00000169 : */ 0x0f000002,0x00000003,
-/*
- INT int_msg_sdtr
-
-at 0x0000016b : */ 0x98080000,0x01010000,
-/*
-
-ENTRY reject_message
-reject_message:
- SET ATN
-
-at 0x0000016d : */ 0x58000008,0x00000000,
-/*
- CLEAR ACK
-
-at 0x0000016f : */ 0x60000040,0x00000000,
-/*
- MOVE 1, NCR53c7xx_msg_reject, WHEN MSG_OUT
-
-at 0x00000171 : */ 0x0e000001,0x00000000,
-/*
- RETURN
-
-at 0x00000173 : */ 0x90080000,0x00000000,
-/*
-
-ENTRY accept_message
-accept_message:
- CLEAR ATN
-
-at 0x00000175 : */ 0x60000008,0x00000000,
-/*
- CLEAR ACK
-
-at 0x00000177 : */ 0x60000040,0x00000000,
-/*
- RETURN
-
-at 0x00000179 : */ 0x90080000,0x00000000,
-/*
-
-ENTRY respond_message
-respond_message:
- SET ATN
-
-at 0x0000017b : */ 0x58000008,0x00000000,
-/*
- CLEAR ACK
-
-at 0x0000017d : */ 0x60000040,0x00000000,
-/*
- MOVE FROM dsa_msgout_other, WHEN MSG_OUT
-
-at 0x0000017f : */ 0x1e000000,0x00000068,
-/*
- RETURN
-
-at 0x00000181 : */ 0x90080000,0x00000000,
-/*
-
-;
-; command_complete
-;
-; PURPOSE : handle command termination when STATUS IN is detected by reading
-; a status byte followed by a command termination message.
-;
-; Normal termination results in an INTFLY instruction, and
-; the host system can pick out which command terminated by
-; examining the MESSAGE and STATUS buffers of all currently
-; executing commands;
-;
-; Abnormal (CHECK_CONDITION) termination results in an
-; int_err_check_condition interrupt so that a REQUEST SENSE
-; command can be issued out-of-order so that no other command
-; clears the contingent allegiance condition.
-;
-;
-; INPUTS : DSA - command
-;
-; CALLS : OK
-;
-; EXITS : On successful termination, control is passed to schedule.
-; On abnormal termination, the user will usually modify the
-; DSA fields and corresponding buffers and return control
-; to select.
-;
-
-ENTRY command_complete
-command_complete:
- MOVE FROM dsa_status, WHEN STATUS
-
-at 0x00000183 : */ 0x1b000000,0x00000060,
-/*
-
- MOVE SFBR TO SCRATCH0 ; Save status
-
-at 0x00000185 : */ 0x6a340000,0x00000000,
-/*
-
-ENTRY command_complete_msgin
-command_complete_msgin:
- MOVE FROM dsa_msgin, WHEN MSG_IN
-
-at 0x00000187 : */ 0x1f000000,0x00000058,
-/*
-; Indicate that we should be expecting a disconnect
- MOVE SCNTL2 & 0x7f TO SCNTL2
-
-at 0x00000189 : */ 0x7c027f00,0x00000000,
-/*
- CLEAR ACK
-
-at 0x0000018b : */ 0x60000040,0x00000000,
-/*
-
- WAIT DISCONNECT
-
-at 0x0000018d : */ 0x48000000,0x00000000,
-/*
-
-;
-; The SCSI specification states that when a UNIT ATTENTION condition
-; is pending, as indicated by a CHECK CONDITION status message,
-; the target shall revert to asynchronous transfers. Since
-; synchronous transfers parameters are maintained on a per INITIATOR/TARGET
-; basis, and returning control to our scheduler could work on a command
-; running on another lun on that target using the old parameters, we must
-; interrupt the host processor to get them changed, or change them ourselves.
-;
-; Once SCSI-II tagged queueing is implemented, things will be even more
-; hairy, since contingent allegiance conditions exist on a per-target/lun
-; basis, and issuing a new command with a different tag would clear it.
-; In these cases, we must interrupt the host processor to get a request
-; added to the HEAD of the queue with the request sense command, or we
-; must automatically issue the request sense command.
-
-
-
-
-
- INTFLY
-
-at 0x0000018f : */ 0x98180000,0x00000000,
-/*
-
-
-
-
-
- JUMP schedule
-
-at 0x00000191 : */ 0x80080000,0x00000000,
-/*
-command_failed:
- INT int_err_check_condition
-
-at 0x00000193 : */ 0x98080000,0x00030000,
-/*
-
-
-
-
-;
-; wait_reselect
-;
-; PURPOSE : This is essentially the idle routine, where control lands
-; when there are no new processes to schedule. wait_reselect
-; waits for reselection, selection, and new commands.
-;
-; When a successful reselection occurs, with the aid
-; of fixed up code in each DSA, wait_reselect walks the
-; reconnect_dsa_queue, asking each dsa if the target ID
-; and LUN match its.
-;
-; If a match is found, a call is made back to reselected_ok,
-; which through the miracles of self modifying code, extracts
-; the found DSA from the reconnect_dsa_queue and then
-; returns control to the DSAs thread of execution.
-;
-; INPUTS : NONE
-;
-; CALLS : OK
-;
-; MODIFIES : DSA,
-;
-; EXITS : On successful reselection, control is returned to the
-; DSA which called reselected_ok. If the WAIT RESELECT
-; was interrupted by a new commands arrival signaled by
-; SIG_P, control is passed to schedule. If the NCR is
-; selected, the host system is interrupted with an
-; int_err_selected which is usually responded to by
-; setting DSP to the target_abort address.
-
-ENTRY wait_reselect
-wait_reselect:
-
-
-
-
-
-
- WAIT RESELECT wait_reselect_failed
-
-at 0x00000195 : */ 0x50000000,0x0000076c,
-/*
-
-reselected:
-
-
-
- CLEAR TARGET
-
-at 0x00000197 : */ 0x60000200,0x00000000,
-/*
- MOVE dmode_memory_to_memory TO DMODE
-
-at 0x00000199 : */ 0x78380000,0x00000000,
-/*
- ; Read all data needed to reestablish the nexus -
- MOVE 1, reselected_identify, WHEN MSG_IN
-
-at 0x0000019b : */ 0x0f000001,0x00000000,
-/*
- ; We used to CLEAR ACK here.
-
-
-
-
-
- ; Point DSA at the current head of the disconnected queue.
- MOVE dmode_memory_to_ncr TO DMODE
-
-at 0x0000019d : */ 0x78380000,0x00000000,
-/*
- MOVE MEMORY 4, reconnect_dsa_head, addr_scratch
-
-at 0x0000019f : */ 0xc0000004,0x00000000,0x00000000,
-/*
- MOVE dmode_memory_to_memory TO DMODE
-
-at 0x000001a2 : */ 0x78380000,0x00000000,
-/*
- CALL scratch_to_dsa
-
-at 0x000001a4 : */ 0x88080000,0x00000980,
-/*
-
- ; Fix the update-next pointer so that the reconnect_dsa_head
- ; pointer is the one that will be updated if this DSA is a hit
- ; and we remove it from the queue.
-
- MOVE MEMORY 4, addr_reconnect_dsa_head, reselected_ok + 8
-
-at 0x000001a6 : */ 0xc0000004,0x00000000,0x00000758,
-/*
-
-ENTRY reselected_check_next
-reselected_check_next:
-
-
-
- ; Check for a NULL pointer.
- MOVE DSA0 TO SFBR
-
-at 0x000001a9 : */ 0x72100000,0x00000000,
-/*
- JUMP reselected_not_end, IF NOT 0
-
-at 0x000001ab : */ 0x80040000,0x000006ec,
-/*
- MOVE DSA1 TO SFBR
-
-at 0x000001ad : */ 0x72110000,0x00000000,
-/*
- JUMP reselected_not_end, IF NOT 0
-
-at 0x000001af : */ 0x80040000,0x000006ec,
-/*
- MOVE DSA2 TO SFBR
-
-at 0x000001b1 : */ 0x72120000,0x00000000,
-/*
- JUMP reselected_not_end, IF NOT 0
-
-at 0x000001b3 : */ 0x80040000,0x000006ec,
-/*
- MOVE DSA3 TO SFBR
-
-at 0x000001b5 : */ 0x72130000,0x00000000,
-/*
- JUMP reselected_not_end, IF NOT 0
-
-at 0x000001b7 : */ 0x80040000,0x000006ec,
-/*
- INT int_err_unexpected_reselect
-
-at 0x000001b9 : */ 0x98080000,0x00020000,
-/*
-
-reselected_not_end:
- ;
- ; XXX the ALU is only eight bits wide, and the assembler
- ; wont do the dirt work for us. As long as dsa_check_reselect
- ; is negative, we need to sign extend with 1 bits to the full
- ; 32 bit width of the address.
- ;
- ; A potential work around would be to have a known alignment
- ; of the DSA structure such that the base address plus
- ; dsa_check_reselect doesn't require carrying from bytes
- ; higher than the LSB.
- ;
-
- MOVE DSA0 TO SFBR
-
-at 0x000001bb : */ 0x72100000,0x00000000,
-/*
- MOVE SFBR + dsa_check_reselect TO SCRATCH0
-
-at 0x000001bd : */ 0x6e340000,0x00000000,
-/*
- MOVE DSA1 TO SFBR
-
-at 0x000001bf : */ 0x72110000,0x00000000,
-/*
- MOVE SFBR + 0xff TO SCRATCH1 WITH CARRY
-
-at 0x000001c1 : */ 0x6f35ff00,0x00000000,
-/*
- MOVE DSA2 TO SFBR
-
-at 0x000001c3 : */ 0x72120000,0x00000000,
-/*
- MOVE SFBR + 0xff TO SCRATCH2 WITH CARRY
-
-at 0x000001c5 : */ 0x6f36ff00,0x00000000,
-/*
- MOVE DSA3 TO SFBR
-
-at 0x000001c7 : */ 0x72130000,0x00000000,
-/*
- MOVE SFBR + 0xff TO SCRATCH3 WITH CARRY
-
-at 0x000001c9 : */ 0x6f37ff00,0x00000000,
-/*
-
- MOVE dmode_ncr_to_memory TO DMODE
-
-at 0x000001cb : */ 0x78380000,0x00000000,
-/*
- MOVE MEMORY 4, addr_scratch, reselected_check + 4
-
-at 0x000001cd : */ 0xc0000004,0x00000000,0x0000074c,
-/*
- MOVE dmode_memory_to_memory TO DMODE
-
-at 0x000001d0 : */ 0x78380000,0x00000000,
-/*
-reselected_check:
- JUMP 0
-
-at 0x000001d2 : */ 0x80080000,0x00000000,
-/*
-
-
-;
-;
-ENTRY reselected_ok
-reselected_ok:
- MOVE MEMORY 4, 0, 0 ; Patched : first word
-
-at 0x000001d4 : */ 0xc0000004,0x00000000,0x00000000,
-/*
- ; is address of
- ; successful dsa_next
- ; Second word is last
- ; unsuccessful dsa_next,
- ; starting with
- ; dsa_reconnect_head
- ; We used to CLEAR ACK here.
-
-
-
-
-
-
- RETURN ; Return control to where
-
-at 0x000001d7 : */ 0x90080000,0x00000000,
-/*
-
-
-
-
-selected:
- INT int_err_selected;
-
-at 0x000001d9 : */ 0x98080000,0x00010000,
-/*
-
-;
-; A select or reselect failure can be caused by one of two conditions :
-; 1. SIG_P was set. This will be the case if the user has written
-; a new value to a previously NULL head of the issue queue.
-;
-; 2. The NCR53c810 was selected or reselected by another device.
-;
-; 3. The bus was already busy since we were selected or reselected
-; before starting the command.
-
-wait_reselect_failed:
-
-
-
-; Check selected bit.
- MOVE SIST0 & 0x20 TO SFBR
-
-at 0x000001db : */ 0x74422000,0x00000000,
-/*
- JUMP selected, IF 0x20
-
-at 0x000001dd : */ 0x800c0020,0x00000764,
-/*
-; Reading CTEST2 clears the SIG_P bit in the ISTAT register.
- MOVE CTEST2 & 0x40 TO SFBR
-
-at 0x000001df : */ 0x741a4000,0x00000000,
-/*
- JUMP schedule, IF 0x40
-
-at 0x000001e1 : */ 0x800c0040,0x00000000,
-/*
-; Check connected bit.
-; FIXME: this needs to change if we support target mode
- MOVE ISTAT & 0x08 TO SFBR
-
-at 0x000001e3 : */ 0x74140800,0x00000000,
-/*
- JUMP reselected, IF 0x08
-
-at 0x000001e5 : */ 0x800c0008,0x0000065c,
-/*
-; FIXME : Something bogus happened, and we shouldn't fail silently.
-
-
-
- INT int_debug_panic
-
-at 0x000001e7 : */ 0x98080000,0x030b0000,
-/*
-
-
-
-select_failed:
-
-
-
-; Otherwise, mask the selected and reselected bits off SIST0
- MOVE SIST0 & 0x30 TO SFBR
-
-at 0x000001e9 : */ 0x74423000,0x00000000,
-/*
- JUMP selected, IF 0x20
-
-at 0x000001eb : */ 0x800c0020,0x00000764,
-/*
- JUMP reselected, IF 0x10
-
-at 0x000001ed : */ 0x800c0010,0x0000065c,
-/*
-; If SIGP is set, the user just gave us another command, and
-; we should restart or return to the scheduler.
-; Reading CTEST2 clears the SIG_P bit in the ISTAT register.
- MOVE CTEST2 & 0x40 TO SFBR
-
-at 0x000001ef : */ 0x741a4000,0x00000000,
-/*
- JUMP select, IF 0x40
-
-at 0x000001f1 : */ 0x800c0040,0x000001fc,
-/*
-; Check connected bit.
-; FIXME: this needs to change if we support target mode
-; FIXME: is this really necessary?
- MOVE ISTAT & 0x08 TO SFBR
-
-at 0x000001f3 : */ 0x74140800,0x00000000,
-/*
- JUMP reselected, IF 0x08
-
-at 0x000001f5 : */ 0x800c0008,0x0000065c,
-/*
-; FIXME : Something bogus happened, and we shouldn't fail silently.
-
-
-
- INT int_debug_panic
-
-at 0x000001f7 : */ 0x98080000,0x030b0000,
-/*
-
-
-;
-; test_1
-; test_2
-;
-; PURPOSE : run some verification tests on the NCR. test_1
-; copies test_src to test_dest and interrupts the host
-; processor, testing for cache coherency and interrupt
-; problems in the processes.
-;
-; test_2 runs a command with offsets relative to the
-; DSA on entry, and is useful for miscellaneous experimentation.
-;
-
-; Verify that interrupts are working correctly and that we don't
-; have a cache invalidation problem.
-
-ABSOLUTE test_src = 0, test_dest = 0
-ENTRY test_1
-test_1:
- MOVE MEMORY 4, test_src, test_dest
-
-at 0x000001f9 : */ 0xc0000004,0x00000000,0x00000000,
-/*
- INT int_test_1
-
-at 0x000001fc : */ 0x98080000,0x04000000,
-/*
-
-;
-; Run arbitrary commands, with test code establishing a DSA
-;
-
-ENTRY test_2
-test_2:
- CLEAR TARGET
-
-at 0x000001fe : */ 0x60000200,0x00000000,
-/*
- SELECT ATN FROM 0, test_2_fail
-
-at 0x00000200 : */ 0x43000000,0x00000850,
-/*
- JUMP test_2_msgout, WHEN MSG_OUT
-
-at 0x00000202 : */ 0x860b0000,0x00000810,
-/*
-ENTRY test_2_msgout
-test_2_msgout:
- MOVE FROM 8, WHEN MSG_OUT
-
-at 0x00000204 : */ 0x1e000000,0x00000008,
-/*
- MOVE FROM 16, WHEN CMD
-
-at 0x00000206 : */ 0x1a000000,0x00000010,
-/*
- MOVE FROM 24, WHEN DATA_IN
-
-at 0x00000208 : */ 0x19000000,0x00000018,
-/*
- MOVE FROM 32, WHEN STATUS
-
-at 0x0000020a : */ 0x1b000000,0x00000020,
-/*
- MOVE FROM 40, WHEN MSG_IN
-
-at 0x0000020c : */ 0x1f000000,0x00000028,
-/*
- MOVE SCNTL2 & 0x7f TO SCNTL2
-
-at 0x0000020e : */ 0x7c027f00,0x00000000,
-/*
- CLEAR ACK
-
-at 0x00000210 : */ 0x60000040,0x00000000,
-/*
- WAIT DISCONNECT
-
-at 0x00000212 : */ 0x48000000,0x00000000,
-/*
-test_2_fail:
- INT int_test_2
-
-at 0x00000214 : */ 0x98080000,0x04010000,
-/*
-
-ENTRY debug_break
-debug_break:
- INT int_debug_break
-
-at 0x00000216 : */ 0x98080000,0x03000000,
-/*
-
-;
-; initiator_abort
-; target_abort
-;
-; PURPOSE : Abort the currently established nexus from with initiator
-; or target mode.
-;
-;
-
-ENTRY target_abort
-target_abort:
- SET TARGET
-
-at 0x00000218 : */ 0x58000200,0x00000000,
-/*
- DISCONNECT
-
-at 0x0000021a : */ 0x48000000,0x00000000,
-/*
- CLEAR TARGET
-
-at 0x0000021c : */ 0x60000200,0x00000000,
-/*
- JUMP schedule
-
-at 0x0000021e : */ 0x80080000,0x00000000,
-/*
-
-ENTRY initiator_abort
-initiator_abort:
- SET ATN
-
-at 0x00000220 : */ 0x58000008,0x00000000,
-/*
-;
-; The SCSI-I specification says that targets may go into MSG out at
-; their leisure upon receipt of the ATN single. On all versions of the
-; specification, we can't change phases until REQ transitions true->false,
-; so we need to sink/source one byte of data to allow the transition.
-;
-; For the sake of safety, we'll only source one byte of data in all
-; cases, but to accommodate the SCSI-I dain bramage, we'll sink an
-; arbitrary number of bytes.
- JUMP spew_cmd, WHEN CMD
-
-at 0x00000222 : */ 0x820b0000,0x000008b8,
-/*
- JUMP eat_msgin, WHEN MSG_IN
-
-at 0x00000224 : */ 0x870b0000,0x000008c8,
-/*
- JUMP eat_datain, WHEN DATA_IN
-
-at 0x00000226 : */ 0x810b0000,0x000008f8,
-/*
- JUMP eat_status, WHEN STATUS
-
-at 0x00000228 : */ 0x830b0000,0x000008e0,
-/*
- JUMP spew_dataout, WHEN DATA_OUT
-
-at 0x0000022a : */ 0x800b0000,0x00000910,
-/*
- JUMP sated
-
-at 0x0000022c : */ 0x80080000,0x00000918,
-/*
-spew_cmd:
- MOVE 1, NCR53c7xx_zero, WHEN CMD
-
-at 0x0000022e : */ 0x0a000001,0x00000000,
-/*
- JUMP sated
-
-at 0x00000230 : */ 0x80080000,0x00000918,
-/*
-eat_msgin:
- MOVE 1, NCR53c7xx_sink, WHEN MSG_IN
-
-at 0x00000232 : */ 0x0f000001,0x00000000,
-/*
- JUMP eat_msgin, WHEN MSG_IN
-
-at 0x00000234 : */ 0x870b0000,0x000008c8,
-/*
- JUMP sated
-
-at 0x00000236 : */ 0x80080000,0x00000918,
-/*
-eat_status:
- MOVE 1, NCR53c7xx_sink, WHEN STATUS
-
-at 0x00000238 : */ 0x0b000001,0x00000000,
-/*
- JUMP eat_status, WHEN STATUS
-
-at 0x0000023a : */ 0x830b0000,0x000008e0,
-/*
- JUMP sated
-
-at 0x0000023c : */ 0x80080000,0x00000918,
-/*
-eat_datain:
- MOVE 1, NCR53c7xx_sink, WHEN DATA_IN
-
-at 0x0000023e : */ 0x09000001,0x00000000,
-/*
- JUMP eat_datain, WHEN DATA_IN
-
-at 0x00000240 : */ 0x810b0000,0x000008f8,
-/*
- JUMP sated
-
-at 0x00000242 : */ 0x80080000,0x00000918,
-/*
-spew_dataout:
- MOVE 1, NCR53c7xx_zero, WHEN DATA_OUT
-
-at 0x00000244 : */ 0x08000001,0x00000000,
-/*
-sated:
- MOVE SCNTL2 & 0x7f TO SCNTL2
-
-at 0x00000246 : */ 0x7c027f00,0x00000000,
-/*
- MOVE 1, NCR53c7xx_msg_abort, WHEN MSG_OUT
-
-at 0x00000248 : */ 0x0e000001,0x00000000,
-/*
- WAIT DISCONNECT
-
-at 0x0000024a : */ 0x48000000,0x00000000,
-/*
- INT int_norm_aborted
-
-at 0x0000024c : */ 0x98080000,0x02040000,
-/*
-
-;
-; dsa_to_scratch
-; scratch_to_dsa
-;
-; PURPOSE :
-; The NCR chips cannot do a move memory instruction with the DSA register
-; as the source or destination. So, we provide a couple of subroutines
-; that let us switch between the DSA register and scratch register.
-;
-; Memory moves to/from the DSPS register also don't work, but we
-; don't use them.
-;
-;
-
-
-dsa_to_scratch:
- MOVE DSA0 TO SFBR
-
-at 0x0000024e : */ 0x72100000,0x00000000,
-/*
- MOVE SFBR TO SCRATCH0
-
-at 0x00000250 : */ 0x6a340000,0x00000000,
-/*
- MOVE DSA1 TO SFBR
-
-at 0x00000252 : */ 0x72110000,0x00000000,
-/*
- MOVE SFBR TO SCRATCH1
-
-at 0x00000254 : */ 0x6a350000,0x00000000,
-/*
- MOVE DSA2 TO SFBR
-
-at 0x00000256 : */ 0x72120000,0x00000000,
-/*
- MOVE SFBR TO SCRATCH2
-
-at 0x00000258 : */ 0x6a360000,0x00000000,
-/*
- MOVE DSA3 TO SFBR
-
-at 0x0000025a : */ 0x72130000,0x00000000,
-/*
- MOVE SFBR TO SCRATCH3
-
-at 0x0000025c : */ 0x6a370000,0x00000000,
-/*
- RETURN
-
-at 0x0000025e : */ 0x90080000,0x00000000,
-/*
-
-scratch_to_dsa:
- MOVE SCRATCH0 TO SFBR
-
-at 0x00000260 : */ 0x72340000,0x00000000,
-/*
- MOVE SFBR TO DSA0
-
-at 0x00000262 : */ 0x6a100000,0x00000000,
-/*
- MOVE SCRATCH1 TO SFBR
-
-at 0x00000264 : */ 0x72350000,0x00000000,
-/*
- MOVE SFBR TO DSA1
-
-at 0x00000266 : */ 0x6a110000,0x00000000,
-/*
- MOVE SCRATCH2 TO SFBR
-
-at 0x00000268 : */ 0x72360000,0x00000000,
-/*
- MOVE SFBR TO DSA2
-
-at 0x0000026a : */ 0x6a120000,0x00000000,
-/*
- MOVE SCRATCH3 TO SFBR
-
-at 0x0000026c : */ 0x72370000,0x00000000,
-/*
- MOVE SFBR TO DSA3
-
-at 0x0000026e : */ 0x6a130000,0x00000000,
-/*
- RETURN
-
-at 0x00000270 : */ 0x90080000,0x00000000,
-};
-
-#define A_NCR53c7xx_msg_abort 0x00000000
-static u32 A_NCR53c7xx_msg_abort_used[] __attribute((unused)) = {
- 0x00000249,
-};
-
-#define A_NCR53c7xx_msg_reject 0x00000000
-static u32 A_NCR53c7xx_msg_reject_used[] __attribute((unused)) = {
- 0x00000172,
-};
-
-#define A_NCR53c7xx_sink 0x00000000
-static u32 A_NCR53c7xx_sink_used[] __attribute((unused)) = {
- 0x00000233,
- 0x00000239,
- 0x0000023f,
-};
-
-#define A_NCR53c7xx_zero 0x00000000
-static u32 A_NCR53c7xx_zero_used[] __attribute((unused)) = {
- 0x0000022f,
- 0x00000245,
-};
-
-#define A_NOP_insn 0x00000000
-static u32 A_NOP_insn_used[] __attribute((unused)) = {
- 0x00000010,
-};
-
-#define A_addr_reconnect_dsa_head 0x00000000
-static u32 A_addr_reconnect_dsa_head_used[] __attribute((unused)) = {
- 0x000001a7,
-};
-
-#define A_addr_scratch 0x00000000
-static u32 A_addr_scratch_used[] __attribute((unused)) = {
- 0x00000004,
- 0x0000001b,
- 0x00000046,
- 0x00000067,
- 0x00000073,
- 0x000000b0,
- 0x000000c6,
- 0x00000128,
- 0x00000141,
- 0x000001a1,
- 0x000001ce,
-};
-
-#define A_addr_temp 0x00000000
-static u32 A_addr_temp_used[] __attribute((unused)) = {
- 0x00000025,
- 0x00000034,
-};
-
-#define A_dmode_memory_to_memory 0x00000000
-static u32 A_dmode_memory_to_memory_used[] __attribute((unused)) = {
- 0x00000005,
- 0x0000001c,
- 0x00000027,
- 0x00000035,
- 0x00000047,
- 0x00000069,
- 0x00000075,
- 0x000000b2,
- 0x000000c8,
- 0x0000012a,
- 0x00000143,
- 0x00000199,
- 0x000001a2,
- 0x000001d0,
-};
-
-#define A_dmode_memory_to_ncr 0x00000000
-static u32 A_dmode_memory_to_ncr_used[] __attribute((unused)) = {
- 0x00000000,
- 0x00000017,
- 0x00000030,
- 0x00000042,
- 0x0000019d,
-};
-
-#define A_dmode_ncr_to_memory 0x00000000
-static u32 A_dmode_ncr_to_memory_used[] __attribute((unused)) = {
- 0x00000022,
- 0x00000064,
- 0x00000070,
- 0x000000ad,
- 0x000000c3,
- 0x00000125,
- 0x0000013e,
- 0x000001cb,
-};
-
-#define A_dsa_check_reselect 0x00000000
-static u32 A_dsa_check_reselect_used[] __attribute((unused)) = {
- 0x000001bd,
-};
-
-#define A_dsa_cmdout 0x00000048
-static u32 A_dsa_cmdout_used[] __attribute((unused)) = {
- 0x00000094,
-};
-
-#define A_dsa_cmnd 0x00000038
-static u32 A_dsa_cmnd_used[] __attribute((unused)) = {
-};
-
-#define A_dsa_datain 0x00000054
-static u32 A_dsa_datain_used[] __attribute((unused)) = {
- 0x000000bb,
-};
-
-#define A_dsa_dataout 0x00000050
-static u32 A_dsa_dataout_used[] __attribute((unused)) = {
- 0x000000a5,
-};
-
-#define A_dsa_end 0x00000070
-static u32 A_dsa_end_used[] __attribute((unused)) = {
-};
-
-#define A_dsa_fields_start 0x00000000
-static u32 A_dsa_fields_start_used[] __attribute((unused)) = {
-};
-
-#define A_dsa_msgin 0x00000058
-static u32 A_dsa_msgin_used[] __attribute((unused)) = {
- 0x00000188,
-};
-
-#define A_dsa_msgout 0x00000040
-static u32 A_dsa_msgout_used[] __attribute((unused)) = {
- 0x00000086,
-};
-
-#define A_dsa_msgout_other 0x00000068
-static u32 A_dsa_msgout_other_used[] __attribute((unused)) = {
- 0x00000180,
-};
-
-#define A_dsa_next 0x00000030
-static u32 A_dsa_next_used[] __attribute((unused)) = {
- 0x0000005c,
-};
-
-#define A_dsa_restore_pointers 0x00000000
-static u32 A_dsa_restore_pointers_used[] __attribute((unused)) = {
- 0x0000012e,
-};
-
-#define A_dsa_save_data_pointer 0x00000000
-static u32 A_dsa_save_data_pointer_used[] __attribute((unused)) = {
- 0x00000115,
-};
-
-#define A_dsa_select 0x0000003c
-static u32 A_dsa_select_used[] __attribute((unused)) = {
- 0x00000081,
-};
-
-#define A_dsa_status 0x00000060
-static u32 A_dsa_status_used[] __attribute((unused)) = {
- 0x00000184,
-};
-
-#define A_dsa_temp_addr_array_value 0x00000000
-static u32 A_dsa_temp_addr_array_value_used[] __attribute((unused)) = {
-};
-
-#define A_dsa_temp_addr_dsa_value 0x00000000
-static u32 A_dsa_temp_addr_dsa_value_used[] __attribute((unused)) = {
- 0x00000003,
-};
-
-#define A_dsa_temp_addr_new_value 0x00000000
-static u32 A_dsa_temp_addr_new_value_used[] __attribute((unused)) = {
-};
-
-#define A_dsa_temp_addr_next 0x00000000
-static u32 A_dsa_temp_addr_next_used[] __attribute((unused)) = {
- 0x00000015,
- 0x0000004e,
-};
-
-#define A_dsa_temp_addr_residual 0x00000000
-static u32 A_dsa_temp_addr_residual_used[] __attribute((unused)) = {
- 0x0000002a,
- 0x00000039,
-};
-
-#define A_dsa_temp_addr_saved_pointer 0x00000000
-static u32 A_dsa_temp_addr_saved_pointer_used[] __attribute((unused)) = {
- 0x00000026,
- 0x00000033,
-};
-
-#define A_dsa_temp_addr_saved_residual 0x00000000
-static u32 A_dsa_temp_addr_saved_residual_used[] __attribute((unused)) = {
- 0x0000002b,
- 0x00000038,
-};
-
-#define A_dsa_temp_lun 0x00000000
-static u32 A_dsa_temp_lun_used[] __attribute((unused)) = {
- 0x0000004b,
-};
-
-#define A_dsa_temp_next 0x00000000
-static u32 A_dsa_temp_next_used[] __attribute((unused)) = {
- 0x0000001a,
-};
-
-#define A_dsa_temp_sync 0x00000000
-static u32 A_dsa_temp_sync_used[] __attribute((unused)) = {
- 0x00000053,
-};
-
-#define A_dsa_temp_target 0x00000000
-static u32 A_dsa_temp_target_used[] __attribute((unused)) = {
- 0x00000040,
-};
-
-#define A_int_debug_break 0x03000000
-static u32 A_int_debug_break_used[] __attribute((unused)) = {
- 0x00000217,
-};
-
-#define A_int_debug_panic 0x030b0000
-static u32 A_int_debug_panic_used[] __attribute((unused)) = {
- 0x000001e8,
- 0x000001f8,
-};
-
-#define A_int_err_check_condition 0x00030000
-static u32 A_int_err_check_condition_used[] __attribute((unused)) = {
- 0x00000194,
-};
-
-#define A_int_err_no_phase 0x00040000
-static u32 A_int_err_no_phase_used[] __attribute((unused)) = {
-};
-
-#define A_int_err_selected 0x00010000
-static u32 A_int_err_selected_used[] __attribute((unused)) = {
- 0x000001da,
-};
-
-#define A_int_err_unexpected_phase 0x00000000
-static u32 A_int_err_unexpected_phase_used[] __attribute((unused)) = {
- 0x0000008c,
- 0x00000092,
- 0x0000009a,
- 0x000000d0,
- 0x000000d4,
- 0x000000d6,
- 0x000000de,
- 0x000000e2,
- 0x000000e4,
- 0x000000ec,
- 0x000000f0,
- 0x000000f2,
- 0x000000f4,
- 0x0000014c,
-};
-
-#define A_int_err_unexpected_reselect 0x00020000
-static u32 A_int_err_unexpected_reselect_used[] __attribute((unused)) = {
- 0x000001ba,
-};
-
-#define A_int_msg_1 0x01020000
-static u32 A_int_msg_1_used[] __attribute((unused)) = {
- 0x0000010e,
- 0x00000110,
-};
-
-#define A_int_msg_sdtr 0x01010000
-static u32 A_int_msg_sdtr_used[] __attribute((unused)) = {
- 0x0000016c,
-};
-
-#define A_int_msg_wdtr 0x01000000
-static u32 A_int_msg_wdtr_used[] __attribute((unused)) = {
- 0x00000160,
-};
-
-#define A_int_norm_aborted 0x02040000
-static u32 A_int_norm_aborted_used[] __attribute((unused)) = {
- 0x0000024d,
-};
-
-#define A_int_norm_command_complete 0x02020000
-static u32 A_int_norm_command_complete_used[] __attribute((unused)) = {
-};
-
-#define A_int_norm_disconnected 0x02030000
-static u32 A_int_norm_disconnected_used[] __attribute((unused)) = {
-};
-
-#define A_int_norm_reselect_complete 0x02010000
-static u32 A_int_norm_reselect_complete_used[] __attribute((unused)) = {
-};
-
-#define A_int_norm_reset 0x02050000
-static u32 A_int_norm_reset_used[] __attribute((unused)) = {
-};
-
-#define A_int_norm_select_complete 0x02000000
-static u32 A_int_norm_select_complete_used[] __attribute((unused)) = {
-};
-
-#define A_int_test_1 0x04000000
-static u32 A_int_test_1_used[] __attribute((unused)) = {
- 0x000001fd,
-};
-
-#define A_int_test_2 0x04010000
-static u32 A_int_test_2_used[] __attribute((unused)) = {
- 0x00000215,
-};
-
-#define A_int_test_3 0x04020000
-static u32 A_int_test_3_used[] __attribute((unused)) = {
-};
-
-#define A_msg_buf 0x00000000
-static u32 A_msg_buf_used[] __attribute((unused)) = {
- 0x00000102,
- 0x0000014e,
- 0x00000158,
- 0x0000015e,
- 0x00000164,
- 0x0000016a,
-};
-
-#define A_reconnect_dsa_head 0x00000000
-static u32 A_reconnect_dsa_head_used[] __attribute((unused)) = {
- 0x0000006c,
- 0x00000074,
- 0x000001a0,
-};
-
-#define A_reselected_identify 0x00000000
-static u32 A_reselected_identify_used[] __attribute((unused)) = {
- 0x00000045,
- 0x0000019c,
-};
-
-#define A_reselected_tag 0x00000000
-static u32 A_reselected_tag_used[] __attribute((unused)) = {
-};
-
-#define A_schedule 0x00000000
-static u32 A_schedule_used[] __attribute((unused)) = {
- 0x0000007e,
- 0x00000192,
- 0x000001e2,
- 0x0000021f,
-};
-
-#define A_test_dest 0x00000000
-static u32 A_test_dest_used[] __attribute((unused)) = {
- 0x000001fb,
-};
-
-#define A_test_src 0x00000000
-static u32 A_test_src_used[] __attribute((unused)) = {
- 0x000001fa,
-};
-
-#define Ent_accept_message 0x000005d4
-#define Ent_cmdout_cmdout 0x0000024c
-#define Ent_command_complete 0x0000060c
-#define Ent_command_complete_msgin 0x0000061c
-#define Ent_data_transfer 0x00000254
-#define Ent_datain_to_jump 0x00000328
-#define Ent_debug_break 0x00000858
-#define Ent_dsa_code_begin 0x00000000
-#define Ent_dsa_code_check_reselect 0x000000f8
-#define Ent_dsa_code_fix_jump 0x0000003c
-#define Ent_dsa_code_restore_pointers 0x000000c0
-#define Ent_dsa_code_save_data_pointer 0x00000088
-#define Ent_dsa_code_template 0x00000000
-#define Ent_dsa_code_template_end 0x00000168
-#define Ent_dsa_schedule 0x00000168
-#define Ent_dsa_zero 0x00000168
-#define Ent_end_data_transfer 0x0000028c
-#define Ent_initiator_abort 0x00000880
-#define Ent_msg_in 0x00000404
-#define Ent_msg_in_restart 0x000003e4
-#define Ent_other_in 0x00000374
-#define Ent_other_out 0x0000033c
-#define Ent_other_transfer 0x000003ac
-#define Ent_reject_message 0x000005b4
-#define Ent_reselected_check_next 0x000006a4
-#define Ent_reselected_ok 0x00000750
-#define Ent_respond_message 0x000005ec
-#define Ent_select 0x000001fc
-#define Ent_select_msgout 0x00000214
-#define Ent_target_abort 0x00000860
-#define Ent_test_1 0x000007e4
-#define Ent_test_2 0x000007f8
-#define Ent_test_2_msgout 0x00000810
-#define Ent_wait_reselect 0x00000654
-static u32 LABELPATCHES[] __attribute((unused)) = {
- 0x00000008,
- 0x0000000a,
- 0x00000013,
- 0x00000016,
- 0x0000001f,
- 0x00000021,
- 0x0000004f,
- 0x00000051,
- 0x0000005b,
- 0x00000068,
- 0x0000006f,
- 0x00000082,
- 0x00000084,
- 0x0000008a,
- 0x0000008e,
- 0x00000090,
- 0x00000096,
- 0x00000098,
- 0x0000009c,
- 0x0000009e,
- 0x000000a0,
- 0x000000a2,
- 0x000000a4,
- 0x000000b1,
- 0x000000b6,
- 0x000000ba,
- 0x000000c7,
- 0x000000cc,
- 0x000000d2,
- 0x000000d8,
- 0x000000da,
- 0x000000e0,
- 0x000000e6,
- 0x000000e8,
- 0x000000ee,
- 0x000000f6,
- 0x000000f8,
- 0x00000104,
- 0x00000106,
- 0x00000108,
- 0x0000010a,
- 0x0000010c,
- 0x00000112,
- 0x00000114,
- 0x00000129,
- 0x00000142,
- 0x00000148,
- 0x00000150,
- 0x00000152,
- 0x00000154,
- 0x0000015a,
- 0x00000166,
- 0x00000196,
- 0x000001a5,
- 0x000001a8,
- 0x000001ac,
- 0x000001b0,
- 0x000001b4,
- 0x000001b8,
- 0x000001cf,
- 0x000001de,
- 0x000001e6,
- 0x000001ec,
- 0x000001ee,
- 0x000001f2,
- 0x000001f6,
- 0x00000201,
- 0x00000203,
- 0x00000223,
- 0x00000225,
- 0x00000227,
- 0x00000229,
- 0x0000022b,
- 0x0000022d,
- 0x00000231,
- 0x00000235,
- 0x00000237,
- 0x0000023b,
- 0x0000023d,
- 0x00000241,
- 0x00000243,
-};
-
-static struct {
- u32 offset;
- void *address;
-} EXTERNAL_PATCHES[] __attribute((unused)) = {
-};
-
-static u32 INSTRUCTIONS __attribute((unused)) = 301;
-static u32 PATCHES __attribute((unused)) = 81;
-static u32 EXTERNAL_PATCHES_LEN __attribute((unused)) = 0;
projects / linux / commitdiff