From: Adis Hamzić Date: Sun, 2 Jun 2013 14:47:54 +0000 (+0200) Subject: radeon: Fix system hang issue when using KMS with older cards X-Git-Tag: v3.4.49~11 X-Git-Url: http://git.hungrycats.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f6321eec602f4eed6a78b0cbb91514d7c4cb74b7;p=linux radeon: Fix system hang issue when using KMS with older cards commit e49f3959a96dc279860af7e86e6dbcfda50580a5 upstream. The current radeon driver initialization routines, when using KMS, are written so that the IRQ installation routine is called before initializing the WB buffer and the CP rings. With some ASICs, though, the IRQ routine tries to access the GFX_INDEX ring causing a call to RREG32 with the value of -1 in radeon_fence_read. This, in turn causes the system to completely hang with some cards, requiring a hard reset. A call stack that can cause such a hang looks like this (using rv515 ASIC for the example here): * rv515_init (rv515.c) * radeon_irq_kms_init (radeon_irq_kms.c) * drm_irq_install (drm_irq.c) * radeon_driver_irq_preinstall_kms (radeon_irq_kms.c) * rs600_irq_process (rs600.c) * radeon_fence_process - due to SW interrupt (radeon_fence.c) * radeon_fence_read (radeon_fence.c) * hang due to RREG32(-1) The patch moves the IRQ installation to the card startup routine, after the ring has been initialized, but before the IRQ has been set. This fixes the issue, but requires a check to see if the IRQ is already installed, as is the case in the system resume codepath. I have tested the patch on three machines using the rv515, the rv770 and the evergreen ASIC. They worked without issues. This seems to be a known issue and has been reported on several bug tracking sites by various distributions (see links below). Most of reports recommend booting the system with KMS disabled and then enabling KMS by reloading the radeon module. For some reason, this was indeed a usable workaround, however, UMS is now deprecated and disabled by default. Bug reports: https://bugzilla.redhat.com/show_bug.cgi?id=845745 https://bugs.launchpad.net/ubuntu/+source/linux/+bug/561789 https://bbs.archlinux.org/viewtopic.php?id=156964 Signed-off-by: Adis Hamzić Signed-off-by: Alex Deucher --- diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c index 6a8776eae1aeb..300099d311879 100644 --- a/drivers/gpu/drm/radeon/evergreen.c +++ b/drivers/gpu/drm/radeon/evergreen.c @@ -3258,6 +3258,12 @@ static int evergreen_startup(struct radeon_device *rdev) } /* Enable IRQ */ + if (!rdev->irq.installed) { + r = radeon_irq_kms_init(rdev); + if (r) + return r; + } + r = r600_irq_init(rdev); if (r) { DRM_ERROR("radeon: IH init failed (%d).\n", r); @@ -3409,10 +3415,6 @@ int evergreen_init(struct radeon_device *rdev) if (r) return r; - r = radeon_irq_kms_init(rdev); - if (r) - return r; - rdev->ring[RADEON_RING_TYPE_GFX_INDEX].ring_obj = NULL; r600_ring_init(rdev, &rdev->ring[RADEON_RING_TYPE_GFX_INDEX], 1024 * 1024); diff --git a/drivers/gpu/drm/radeon/ni.c b/drivers/gpu/drm/radeon/ni.c index d706da8986b42..f5387b3e699f7 100644 --- a/drivers/gpu/drm/radeon/ni.c +++ b/drivers/gpu/drm/radeon/ni.c @@ -1614,6 +1614,12 @@ static int cayman_startup(struct radeon_device *rdev) } /* Enable IRQ */ + if (!rdev->irq.installed) { + r = radeon_irq_kms_init(rdev); + if (r) + return r; + } + r = r600_irq_init(rdev); if (r) { DRM_ERROR("radeon: IH init failed (%d).\n", r); @@ -1744,10 +1750,6 @@ int cayman_init(struct radeon_device *rdev) if (r) return r; - r = radeon_irq_kms_init(rdev); - if (r) - return r; - ring->ring_obj = NULL; r600_ring_init(rdev, ring, 1024 * 1024); diff --git a/drivers/gpu/drm/radeon/r100.c b/drivers/gpu/drm/radeon/r100.c index fe33d35dae8c6..40ed0e5b95a3b 100644 --- a/drivers/gpu/drm/radeon/r100.c +++ b/drivers/gpu/drm/radeon/r100.c @@ -3952,6 +3952,12 @@ static int r100_startup(struct radeon_device *rdev) } /* Enable IRQ */ + if (!rdev->irq.installed) { + r = radeon_irq_kms_init(rdev); + if (r) + return r; + } + r100_irq_set(rdev); rdev->config.r100.hdp_cntl = RREG32(RADEON_HOST_PATH_CNTL); /* 1M ring buffer */ @@ -4111,9 +4117,6 @@ int r100_init(struct radeon_device *rdev) r100_mc_init(rdev); /* Fence driver */ r = radeon_fence_driver_init(rdev); - if (r) - return r; - r = radeon_irq_kms_init(rdev); if (r) return r; /* Memory manager */ diff --git a/drivers/gpu/drm/radeon/r300.c b/drivers/gpu/drm/radeon/r300.c index fa14383f9ca09..63b53aa9536fb 100644 --- a/drivers/gpu/drm/radeon/r300.c +++ b/drivers/gpu/drm/radeon/r300.c @@ -1405,6 +1405,12 @@ static int r300_startup(struct radeon_device *rdev) } /* Enable IRQ */ + if (!rdev->irq.installed) { + r = radeon_irq_kms_init(rdev); + if (r) + return r; + } + r100_irq_set(rdev); rdev->config.r300.hdp_cntl = RREG32(RADEON_HOST_PATH_CNTL); /* 1M ring buffer */ @@ -1543,9 +1549,6 @@ int r300_init(struct radeon_device *rdev) r300_mc_init(rdev); /* Fence driver */ r = radeon_fence_driver_init(rdev); - if (r) - return r; - r = radeon_irq_kms_init(rdev); if (r) return r; /* Memory manager */ diff --git a/drivers/gpu/drm/radeon/r420.c b/drivers/gpu/drm/radeon/r420.c index f3fcaacfea01e..1a9347fdd15e9 100644 --- a/drivers/gpu/drm/radeon/r420.c +++ b/drivers/gpu/drm/radeon/r420.c @@ -265,6 +265,12 @@ static int r420_startup(struct radeon_device *rdev) } /* Enable IRQ */ + if (!rdev->irq.installed) { + r = radeon_irq_kms_init(rdev); + if (r) + return r; + } + r100_irq_set(rdev); rdev->config.r300.hdp_cntl = RREG32(RADEON_HOST_PATH_CNTL); /* 1M ring buffer */ @@ -417,10 +423,6 @@ int r420_init(struct radeon_device *rdev) if (r) { return r; } - r = radeon_irq_kms_init(rdev); - if (r) { - return r; - } /* Memory manager */ r = radeon_bo_init(rdev); if (r) { diff --git a/drivers/gpu/drm/radeon/r520.c b/drivers/gpu/drm/radeon/r520.c index ebcc15b03c9f9..57be78461ab57 100644 --- a/drivers/gpu/drm/radeon/r520.c +++ b/drivers/gpu/drm/radeon/r520.c @@ -194,6 +194,12 @@ static int r520_startup(struct radeon_device *rdev) } /* Enable IRQ */ + if (!rdev->irq.installed) { + r = radeon_irq_kms_init(rdev); + if (r) + return r; + } + rs600_irq_set(rdev); rdev->config.r300.hdp_cntl = RREG32(RADEON_HOST_PATH_CNTL); /* 1M ring buffer */ @@ -299,9 +305,6 @@ int r520_init(struct radeon_device *rdev) rv515_debugfs(rdev); /* Fence driver */ r = radeon_fence_driver_init(rdev); - if (r) - return r; - r = radeon_irq_kms_init(rdev); if (r) return r; /* Memory manager */ diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c index b1ff9ccd2d625..8c403d946acc7 100644 --- a/drivers/gpu/drm/radeon/r600.c +++ b/drivers/gpu/drm/radeon/r600.c @@ -2470,6 +2470,12 @@ int r600_startup(struct radeon_device *rdev) } /* Enable IRQ */ + if (!rdev->irq.installed) { + r = radeon_irq_kms_init(rdev); + if (r) + return r; + } + r = r600_irq_init(rdev); if (r) { DRM_ERROR("radeon: IH init failed (%d).\n", r); @@ -2624,10 +2630,6 @@ int r600_init(struct radeon_device *rdev) if (r) return r; - r = radeon_irq_kms_init(rdev); - if (r) - return r; - rdev->ring[RADEON_RING_TYPE_GFX_INDEX].ring_obj = NULL; r600_ring_init(rdev, &rdev->ring[RADEON_RING_TYPE_GFX_INDEX], 1024 * 1024); diff --git a/drivers/gpu/drm/radeon/rs400.c b/drivers/gpu/drm/radeon/rs400.c index 4cf381b3a6d81..5099bd32e1953 100644 --- a/drivers/gpu/drm/radeon/rs400.c +++ b/drivers/gpu/drm/radeon/rs400.c @@ -417,6 +417,12 @@ static int rs400_startup(struct radeon_device *rdev) } /* Enable IRQ */ + if (!rdev->irq.installed) { + r = radeon_irq_kms_init(rdev); + if (r) + return r; + } + r100_irq_set(rdev); rdev->config.r300.hdp_cntl = RREG32(RADEON_HOST_PATH_CNTL); /* 1M ring buffer */ @@ -539,9 +545,6 @@ int rs400_init(struct radeon_device *rdev) rs400_mc_init(rdev); /* Fence driver */ r = radeon_fence_driver_init(rdev); - if (r) - return r; - r = radeon_irq_kms_init(rdev); if (r) return r; /* Memory manager */ diff --git a/drivers/gpu/drm/radeon/rs600.c b/drivers/gpu/drm/radeon/rs600.c index d25cf869d08dd..52480010156d6 100644 --- a/drivers/gpu/drm/radeon/rs600.c +++ b/drivers/gpu/drm/radeon/rs600.c @@ -864,6 +864,12 @@ static int rs600_startup(struct radeon_device *rdev) } /* Enable IRQ */ + if (!rdev->irq.installed) { + r = radeon_irq_kms_init(rdev); + if (r) + return r; + } + rs600_irq_set(rdev); rdev->config.r300.hdp_cntl = RREG32(RADEON_HOST_PATH_CNTL); /* 1M ring buffer */ @@ -992,9 +998,6 @@ int rs600_init(struct radeon_device *rdev) rs600_debugfs(rdev); /* Fence driver */ r = radeon_fence_driver_init(rdev); - if (r) - return r; - r = radeon_irq_kms_init(rdev); if (r) return r; /* Memory manager */ diff --git a/drivers/gpu/drm/radeon/rs690.c b/drivers/gpu/drm/radeon/rs690.c index f2c3b9d75f188..c46900c2c1aa6 100644 --- a/drivers/gpu/drm/radeon/rs690.c +++ b/drivers/gpu/drm/radeon/rs690.c @@ -628,6 +628,12 @@ static int rs690_startup(struct radeon_device *rdev) } /* Enable IRQ */ + if (!rdev->irq.installed) { + r = radeon_irq_kms_init(rdev); + if (r) + return r; + } + rs600_irq_set(rdev); rdev->config.r300.hdp_cntl = RREG32(RADEON_HOST_PATH_CNTL); /* 1M ring buffer */ @@ -757,9 +763,6 @@ int rs690_init(struct radeon_device *rdev) rv515_debugfs(rdev); /* Fence driver */ r = radeon_fence_driver_init(rdev); - if (r) - return r; - r = radeon_irq_kms_init(rdev); if (r) return r; /* Memory manager */ diff --git a/drivers/gpu/drm/radeon/rv515.c b/drivers/gpu/drm/radeon/rv515.c index 43af363ead376..0532bbee9f95f 100644 --- a/drivers/gpu/drm/radeon/rv515.c +++ b/drivers/gpu/drm/radeon/rv515.c @@ -386,6 +386,12 @@ static int rv515_startup(struct radeon_device *rdev) } /* Enable IRQ */ + if (!rdev->irq.installed) { + r = radeon_irq_kms_init(rdev); + if (r) + return r; + } + rs600_irq_set(rdev); rdev->config.r300.hdp_cntl = RREG32(RADEON_HOST_PATH_CNTL); /* 1M ring buffer */ @@ -518,9 +524,6 @@ int rv515_init(struct radeon_device *rdev) rv515_debugfs(rdev); /* Fence driver */ r = radeon_fence_driver_init(rdev); - if (r) - return r; - r = radeon_irq_kms_init(rdev); if (r) return r; /* Memory manager */ diff --git a/drivers/gpu/drm/radeon/rv770.c b/drivers/gpu/drm/radeon/rv770.c index 591040b946601..4a3937fa2dc76 100644 --- a/drivers/gpu/drm/radeon/rv770.c +++ b/drivers/gpu/drm/radeon/rv770.c @@ -1099,6 +1099,12 @@ static int rv770_startup(struct radeon_device *rdev) } /* Enable IRQ */ + if (!rdev->irq.installed) { + r = radeon_irq_kms_init(rdev); + if (r) + return r; + } + r = r600_irq_init(rdev); if (r) { DRM_ERROR("radeon: IH init failed (%d).\n", r); @@ -1237,10 +1243,6 @@ int rv770_init(struct radeon_device *rdev) if (r) return r; - r = radeon_irq_kms_init(rdev); - if (r) - return r; - rdev->ring[RADEON_RING_TYPE_GFX_INDEX].ring_obj = NULL; r600_ring_init(rdev, &rdev->ring[RADEON_RING_TYPE_GFX_INDEX], 1024 * 1024); diff --git a/drivers/gpu/drm/radeon/si.c b/drivers/gpu/drm/radeon/si.c index 2dbd585c81f19..e22b460a4f0c1 100644 --- a/drivers/gpu/drm/radeon/si.c +++ b/drivers/gpu/drm/radeon/si.c @@ -3876,6 +3876,12 @@ static int si_startup(struct radeon_device *rdev) } /* Enable IRQ */ + if (!rdev->irq.installed) { + r = radeon_irq_kms_init(rdev); + if (r) + return r; + } + r = si_irq_init(rdev); if (r) { DRM_ERROR("radeon: IH init failed (%d).\n", r); @@ -4044,10 +4050,6 @@ int si_init(struct radeon_device *rdev) if (r) return r; - r = radeon_irq_kms_init(rdev); - if (r) - return r; - ring = &rdev->ring[RADEON_RING_TYPE_GFX_INDEX]; ring->ring_obj = NULL; r600_ring_init(rdev, ring, 1024 * 1024);