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| author | Dave Airlie <airlied@redhat.com> | 2010-02-05 16:00:07 +1000 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2010-02-11 19:11:32 +1000 |
| commit | 82568565683b4991964a5fc89a9ca0c7122818e8 (patch) | |
| tree | 3c04fa40a00a440a322c802abd41175e90b71e21 /drivers/gpu/drm/radeon/rv770.c | |
| parent | e34398952e056bbd99f9099fae77be26e5c6aa78 (diff) | |
| download | lwn-82568565683b4991964a5fc89a9ca0c7122818e8.tar.gz lwn-82568565683b4991964a5fc89a9ca0c7122818e8.zip | |
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/rv770.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/rv770.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/rv770.c b/drivers/gpu/drm/radeon/rv770.c index 3ecd138815d8..6f1f4abbe88c 100644 --- a/drivers/gpu/drm/radeon/rv770.c +++ b/drivers/gpu/drm/radeon/rv770.c @@ -56,6 +56,7 @@ int rv770_pcie_gart_enable(struct radeon_device *rdev) r = radeon_gart_table_vram_pin(rdev); if (r) return r; + radeon_gart_restore(rdev); /* Setup L2 cache */ WREG32(VM_L2_CNTL, ENABLE_L2_CACHE | ENABLE_L2_FRAGMENT_PROCESSING | ENABLE_L2_PTE_CACHE_LRU_UPDATE_BY_WRITE | |