#include "ncr53c8xx.h"
-/*
-** Donnot compile integrity checking code for Linux-2.3.0
-** and above since SCSI data structures are not ready yet.
-*/
-/* #if LINUX_VERSION_CODE < KERNEL_VERSION(2,3,0) */
-#if 0
-#define SCSI_NCR_INTEGRITY_CHECKING
-#endif
-
#define NAME53C "ncr53c"
#define NAME53C8XX "ncr53c8xx"
/*3*/ u_char wval;
#endif
-#ifdef SCSI_NCR_INTEGRITY_CHECKING
- u_char ic_min_sync;
- u_char ic_max_width;
- u_char ic_maximums_set;
- u_char ic_done;
-#endif
-
/* User settable limits and options. */
u_char usrsync;
u_char usrwide;
struct ccb *ccb; /* Global CCB */
struct usrcmd user; /* Command from user */
volatile u_char release_stage; /* Synchronisation stage on release */
-
-#ifdef SCSI_NCR_INTEGRITY_CHECKING
- /*----------------------------------------------------------------
- ** Fields that are used for integrity check
- **----------------------------------------------------------------
- */
- unsigned char check_integrity; /* Enable midlayer integ.check on
- * bus scan. */
- unsigned char check_integ_par; /* Set if par or Init. Det. error
- * used only during integ check */
-#endif
};
#define NCB_SCRIPT_PHYS(np,lbl) (np->p_script + offsetof (struct script, lbl))
static u_long ncr_lookup (char* id);
static void ncr_negotiate (struct ncb* np, struct tcb* tp);
static int ncr_prepare_nego(struct ncb *np, struct ccb *cp, u_char *msgptr);
-#ifdef SCSI_NCR_INTEGRITY_CHECKING
-static int ncr_ic_nego(struct ncb *np, struct ccb *cp, struct scsi_cmnd *cmd, u_char *msgptr);
-#endif
static void ncr_script_copy_and_bind
(struct ncb *np, ncrcmd *src, ncrcmd *dst, int len);
}
}
-/*==========================================================
-**
-**
-** Prepare the next negotiation message for integrity check,
-** if needed.
-**
-** Fill in the part of message buffer that contains the
-** negotiation and the nego_status field of the CCB.
-** Returns the size of the message in bytes.
-**
-**
-**==========================================================
-*/
-
-#ifdef SCSI_NCR_INTEGRITY_CHECKING
-static int ncr_ic_nego(struct ncb *np, struct ccb *cp, struct scsi_cmnd *cmd, u_char *msgptr)
-{
- struct tcb *tp = &np->target[cp->target];
- int msglen = 0;
- int nego = 0;
- u_char no_increase;
-
- if (tp->inq_done) {
-
- if (!tp->ic_maximums_set) {
- tp->ic_maximums_set = 1;
-
- /* check target and host adapter capabilities */
- if ( (tp->inq_byte7 & INQ7_WIDE16) &&
- np->maxwide && tp->usrwide )
- tp->ic_max_width = 1;
- else
- tp->ic_max_width = 0;
-
- if ((tp->inq_byte7 & INQ7_SYNC) && tp->maxoffs) {
- tp->ic_min_sync = (tp->minsync < np->minsync) ?
- np->minsync : tp->minsync;
- }
- else
- tp->ic_min_sync = 255;
-
- tp->period = 1;
- tp->widedone = 1;
- }
-
- if (DEBUG_FLAGS & DEBUG_IC) {
- printk("%s: cmd->ic_nego %d, 1st byte 0x%2X\n",
- ncr_name(np), cmd->ic_nego, cmd->cmnd[0]);
- }
-
- /* First command from integrity check routine will request
- * a PPR message. Disable.
- */
- if ((cmd->ic_nego & NS_PPR) == NS_PPR)
- cmd->ic_nego &= ~NS_PPR;
- /* Previous command recorded a parity or an initiator
- * detected error condition. Force bus to narrow for this
- * target. Clear flag. Negotation on request sense.
- * Note: kernel forces 2 bus resets :o( but clears itself out.
- * Minor bug? in scsi_obsolete.c (ugly)
- */
- if (np->check_integ_par) {
- printk("%s: Parity Error. Target set to narrow.\n",
- ncr_name(np));
- tp->ic_max_width = 0;
- tp->widedone = tp->period = 0;
- }
-
- /* In case of a bus reset, ncr_negotiate will reset
- * the flags tp->widedone and tp->period to 0, forcing
- * a new negotiation.
- */
- no_increase = 0;
- if (tp->widedone == 0) {
- cmd->ic_nego = NS_WIDE;
- tp->widedone = 1;
- no_increase = 1;
- }
- else if (tp->period == 0) {
- cmd->ic_nego = NS_SYNC;
- tp->period = 1;
- no_increase = 1;
- }
-
- switch (cmd->ic_nego) {
- case NS_WIDE:
- /*
- ** negotiate wide transfers ?
- ** Do NOT negotiate if device only supports
- ** narrow.
- */
- if (tp->ic_max_width | np->check_integ_par) {
- nego = NS_WIDE;
-
- msgptr[msglen++] = M_EXTENDED;
- msgptr[msglen++] = 2;
- msgptr[msglen++] = M_X_WIDE_REQ;
- msgptr[msglen++] = cmd->ic_nego_width & tp->ic_max_width;
- }
- else
- cmd->ic_nego_width &= tp->ic_max_width;
-
- break;
-
- case NS_SYNC:
- /*
- ** negotiate synchronous transfers?
- ** Target must support sync transfers.
- **
- ** If period becomes longer than max, reset to async
- */
-
- if (tp->inq_byte7 & INQ7_SYNC) {
-
- nego = NS_SYNC;
-
- msgptr[msglen++] = M_EXTENDED;
- msgptr[msglen++] = 3;
- msgptr[msglen++] = M_X_SYNC_REQ;
-
- switch (cmd->ic_nego_sync) {
- case 2: /* increase the period */
- if (!no_increase) {
- if (tp->ic_min_sync <= 0x0A)
- tp->ic_min_sync = 0x0C;
- else if (tp->ic_min_sync <= 0x0C)
- tp->ic_min_sync = 0x19;
- else if (tp->ic_min_sync <= 0x19)
- tp->ic_min_sync *= 2;
- else {
- tp->ic_min_sync = 255;
- cmd->ic_nego_sync = 0;
- tp->maxoffs = 0;
- }
- }
- msgptr[msglen++] = tp->maxoffs?tp->ic_min_sync:0;
- msgptr[msglen++] = tp->maxoffs;
- break;
-
- case 1: /* nego. to maximum */
- msgptr[msglen++] = tp->maxoffs?tp->ic_min_sync:0;
- msgptr[msglen++] = tp->maxoffs;
- break;
-
- case 0: /* nego to async */
- default:
- msgptr[msglen++] = 0;
- msgptr[msglen++] = 0;
- break;
- };
- }
- else
- cmd->ic_nego_sync = 0;
- break;
-
- case NS_NOCHANGE:
- default:
- break;
- };
- };
-
- cp->nego_status = nego;
- np->check_integ_par = 0;
-
- if (nego) {
- tp->nego_cp = cp;
- if (DEBUG_FLAGS & DEBUG_NEGO) {
- ncr_print_msg(cp, nego == NS_WIDE ?
- "wide/narrow msgout": "sync/async msgout", msgptr);
- };
- };
-
- return msglen;
-}
-#endif /* SCSI_NCR_INTEGRITY_CHECKING */
-
/*==========================================================
**
**
if (!tp->widedone) {
if (tp->inq_byte7 & INQ7_WIDE16) {
nego = NS_WIDE;
-#ifdef SCSI_NCR_INTEGRITY_CHECKING
- if (tp->ic_done)
- tp->usrwide &= tp->ic_max_width;
-#endif
} else
tp->widedone=1;
if (!nego && !tp->period) {
if (tp->inq_byte7 & INQ7_SYNC) {
nego = NS_SYNC;
-#ifdef SCSI_NCR_INTEGRITY_CHECKING
- if ((tp->ic_done) &&
- (tp->minsync < tp->ic_min_sync))
- tp->minsync = tp->ic_min_sync;
-#endif
} else {
tp->period =0xffff;
PRINT_TARGET(np, cp->target);
cp->nego_status = 0;
-#ifdef SCSI_NCR_INTEGRITY_CHECKING
- if ((np->check_integrity && tp->ic_done) || !np->check_integrity) {
- if ((!tp->widedone || !tp->period) && !tp->nego_cp && lp) {
- msglen += ncr_prepare_nego (np, cp, msgptr + msglen);
- }
- }
- else if (np->check_integrity && (cmd->ic_in_progress)) {
- msglen += ncr_ic_nego (np, cp, cmd, msgptr + msglen);
- }
- else if (np->check_integrity && cmd->ic_complete) {
- /*
- * Midlayer signal to the driver that all of the scsi commands
- * for the integrity check have completed. Save the negotiated
- * parameters (extracted from sval and wval).
- */
-
- {
- u_char idiv;
- idiv = (tp->wval>>4) & 0x07;
- if ((tp->sval&0x1f) && idiv )
- tp->period = (((tp->sval>>5)+4)
- *div_10M[idiv-1])/np->clock_khz;
- else
- tp->period = 0xffff;
- }
- /*
- * tp->period contains 10 times the transfer period,
- * which itself is 4 * the requested negotiation rate.
- */
- if (tp->period <= 250) tp->ic_min_sync = 10;
- else if (tp->period <= 303) tp->ic_min_sync = 11;
- else if (tp->period <= 500) tp->ic_min_sync = 12;
- else
- tp->ic_min_sync = (tp->period + 40 - 1) / 40;
-
-
- /*
- * Negotiation for this target it complete.
- */
- tp->ic_max_width = (tp->wval & EWS) ? 1: 0;
- tp->ic_done = 1;
- tp->widedone = 1;
-
- printk("%s: Integrity Check Complete: \n", ncr_name(np));
-
- printk("%s: %s %s SCSI", ncr_name(np),
- (tp->sval&0x1f)?"SYNC":"ASYNC",
- tp->ic_max_width?"WIDE":"NARROW");
-
- if (tp->sval&0x1f) {
- u_long mbs = 10000 * (tp->ic_max_width + 1);
-
- printk(" %d.%d MB/s", (int) (mbs / tp->period),
- (int) (mbs % tp->period));
-
- printk(" (%d ns, %d offset)\n",
- tp->period/10, tp->sval&0x1f);
- } else {
- printk(" %d MB/s. \n ", (tp->ic_max_width+1)*5);
- }
- }
-#else
if ((!tp->widedone || !tp->period) && !tp->nego_cp && lp) {
msglen += ncr_prepare_nego (np, cp, msgptr + msglen);
}
-#endif /* SCSI_NCR_INTEGRITY_CHECKING */
/*----------------------------------------------------
**
else
msg = M_ID_ERROR;
-#ifdef SCSI_NCR_INTEGRITY_CHECKING
- /*
- ** Save error message. For integrity check use only.
- */
- if (np->check_integrity)
- np->check_integ_par = msg;
-#endif
/*
* If the NCR stopped on a MOVE ^ DATA_IN, we jump to a
instance->can_queue = (MAX_START-4);
scsi_set_device(instance, device->dev);
-#ifdef SCSI_NCR_INTEGRITY_CHECKING
- np->check_integrity = 0;
- instance->check_integrity = 0;
-
-#ifdef SCSI_NCR_ENABLE_INTEGRITY_CHECK
- if ( !(driver_setup.bus_check & 0x04) ) {
- np->check_integrity = 1;
- instance->check_integrity = 1;
- }
-#endif
-#endif
/* Patch script to physical addresses */
ncr_script_fill(&script0, &scripth0);
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