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| author | Jerome Glisse <jglisse@redhat.com> | 2010-01-15 14:44:39 +0100 |
|---|---|---|
| committer | Dave Airlie <airlied@linux.ie> | 2010-01-21 08:45:01 +1000 |
| commit | 7924e5eb8fe422d6b1ce3b3e2be749a480dfcdd9 (patch) | |
| tree | 9fbe9d6b1d23b01300e95bebd09b4ee4a3d1e697 /drivers/gpu/drm/radeon | |
| parent | 79c2bbc505751bb5130ac753251fc9a0eb37bb12 (diff) | |
| download | blackbird-op-linux-7924e5eb8fe422d6b1ce3b3e2be749a480dfcdd9.tar.gz blackbird-op-linux-7924e5eb8fe422d6b1ce3b3e2be749a480dfcdd9.zip | |
drm/radeon/kms: r600 handle irq vector ring overflow
In some rare case i faced an irq overflow quickly followed by
a GPU lockup (hard hang) this patch try to deal with irq vector
ring overflow, so far haven't been able to reproduce it with
the patch.
Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Reviewed-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@linux.ie>
Diffstat (limited to 'drivers/gpu/drm/radeon')
| -rw-r--r-- | drivers/gpu/drm/radeon/r600.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c index 0f9a8c6788a3..bb9115bdc3a2 100644 --- a/drivers/gpu/drm/radeon/r600.c +++ b/drivers/gpu/drm/radeon/r600.c @@ -2648,9 +2648,13 @@ static inline u32 r600_get_ih_wptr(struct radeon_device *rdev) wptr = RREG32(IH_RB_WPTR); if (wptr & RB_OVERFLOW) { - WARN_ON(1); - /* XXX deal with overflow */ - DRM_ERROR("IH RB overflow\n"); + /* When a ring buffer overflow happen start parsing interrupt + * from the last not overwritten vector (wptr + 16). Hopefully + * this should allow us to catchup. + */ + dev_warn(rdev->dev, "IH ring buffer overflow (0x%08X, %d, %d)\n", + wptr, rdev->ih.rptr, (wptr + 16) + rdev->ih.ptr_mask); + rdev->ih.rptr = (wptr + 16) & rdev->ih.ptr_mask; tmp = RREG32(IH_RB_CNTL); tmp |= IH_WPTR_OVERFLOW_CLEAR; WREG32(IH_RB_CNTL, tmp); |
