drm/radeon/kms: set gart pages to invalid on unbind and point to dummy page

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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>

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This commit is contained in:

Dave Airlie 2010-02-05 16:00:07 +10:00

parent e34398952e

commit 8256856568

10 changed files with 40 additions and 3 deletions

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1

drivers/gpu/drm/radeon/evergreen.c

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1

drivers/gpu/drm/radeon/r100.c

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drivers/gpu/drm/radeon/r300.c

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drivers/gpu/drm/radeon/r600.c

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drivers/gpu/drm/radeon/radeon.h

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drivers/gpu/drm/radeon/radeon_device.c

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drivers/gpu/drm/radeon/radeon_gart.c

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drivers/gpu/drm/radeon/rs400.c

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drivers/gpu/drm/radeon/rs600.c

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drivers/gpu/drm/radeon/rv770.c

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