drm/amdgpu: protect ring overrun

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Wait for the oldest sequence on the ring
to be signaled in order to make sure there
will be no command overrun.

v2: fix coding stype and remove abs operation
v3: remove the initialization of variable r

Signed-off-by: Yintian Tao <yttao@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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This commit is contained in:

Yintian Tao 2020-04-23 12:05:54 +08:00 • committed by Alex Deucher

parent 312a79b6ea

commit 04e4e2e955

7 changed files with 61 additions and 12 deletions

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10

drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c

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22

drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c

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3

drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h

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8

drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c

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14

drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c

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8

drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c

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8

drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c

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