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authorDave Airlie <airlied@redhat.com>2010-02-05 16:00:07 +1000
committerDave Airlie <airlied@redhat.com>2010-02-11 19:11:32 +1000
commit82568565683b4991964a5fc89a9ca0c7122818e8 (patch)
tree3c04fa40a00a440a322c802abd41175e90b71e21 /drivers/gpu/drm/radeon/rs400.c
parente34398952e056bbd99f9099fae77be26e5c6aa78 (diff)
downloadop-kernel-dev-82568565683b4991964a5fc89a9ca0c7122818e8.zip
op-kernel-dev-82568565683b4991964a5fc89a9ca0c7122818e8.tar.gz
drm/radeon/kms: set gart pages to invalid on unbind and point to dummy page
this uses a new entrypoint to invalidate gart entries instead of using 0. Changed to rather than pointing to 0 address point empty entry to dummy page. This might help to avoid hard lockup if for some wrong reasons GPU try to access unmapped GART entry. I'm not 100% sure this is going to work, we probably need to allocate a dummy page and point all the GTT entries at it similiar to what AGP does. but we can test this first I suppose. Signed-off-by: Jerome Glisse <jglisse@redhat.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/radeon/rs400.c')
-rw-r--r--drivers/gpu/drm/radeon/rs400.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/rs400.c b/drivers/gpu/drm/radeon/rs400.c
index 287fceb..1e4582e 100644
--- a/drivers/gpu/drm/radeon/rs400.c
+++ b/drivers/gpu/drm/radeon/rs400.c
@@ -113,6 +113,7 @@ int rs400_gart_enable(struct radeon_device *rdev)
uint32_t size_reg;
uint32_t tmp;
+ radeon_gart_restore(rdev);
tmp = RREG32_MC(RS690_AIC_CTRL_SCRATCH);
tmp |= RS690_DIS_OUT_OF_PCI_GART_ACCESS;
WREG32_MC(RS690_AIC_CTRL_SCRATCH, tmp);
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