redonkable/alistair23-linux
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drm/i915: Add support for GPU reset on gen6.

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This has proven sufficient to recover from a hang of the GPU using the
gem_bad_blit test while at the KMS console then starting X.  When
attempting the same during an X session, the timer doesn't appear to
trigger.

Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Eric Anholt 2010-11-18 09:31:14 +08:00 committed by Chris Wilson
parent 75a6898ffd
commit cff458c210
2 changed files with 17 additions and 0 deletions
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11
drivers/gpu/drm/i915/i915_drv.c
View file

@ -405,6 +405,14 @@ static int ironlake_do_reset(struct drm_device *dev, u8 flags)
return wait_for(I915_READ(MCHBAR_MIRROR_BASE + ILK_GDSR) & 0x1, 500);
}
static int gen6_do_reset(struct drm_device *dev, u8 flags)
{
struct drm_i915_private *dev_priv = dev->dev_private;
I915_WRITE(GEN6_GDRST, GEN6_GRDOM_FULL);
return wait_for((I915_READ(GEN6_GDRST) & GEN6_GRDOM_FULL) == 0, 500);
}
/**
* i965_reset - reset chip after a hang
* @dev: drm device to reset
@ -439,6 +447,9 @@ int i915_reset(struct drm_device *dev, u8 flags)
if (get_seconds() - dev_priv->last_gpu_reset < 5) {
DRM_ERROR("GPU hanging too fast, declaring wedged!\n");
} else switch (INTEL_INFO(dev)->gen) {
case 6:
ret = gen6_do_reset(dev, flags);
break;
case 5:
ret = ironlake_do_reset(dev, flags);
break;

6
drivers/gpu/drm/i915/i915_reg.h
View file

@ -78,6 +78,12 @@
#define GRDOM_RENDER (1<<2)
#define GRDOM_MEDIA (3<<2)
#define GEN6_GDRST 0x941c
#define GEN6_GRDOM_FULL (1 << 0)
#define GEN6_GRDOM_RENDER (1 << 1)
#define GEN6_GRDOM_MEDIA (1 << 2)
#define GEN6_GRDOM_BLT (1 << 3)
/* VGA stuff */
#define VGA_ST01_MDA 0x3ba