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drm/amdgpu: add VM generation token

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Instead of using the VRAM lost counter add a 64bit token which indicates
if a context or job is still valid to use.

Should the VRAM be lost or the page tables need re-creation the token will
change indicating that userspace needs to act and re-create the contexts
and re-submit the work.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Luben Tuikov <luben.tuikov@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König
2023-04-19 15:17:57 +02:00
committed by Alex Deucher
parent 55bf196f60
commit f88e295e90
7 changed files with 37 additions and 7 deletions
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4
drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
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@@ -333,7 +333,7 @@ static int amdgpu_ctx_init(struct amdgpu_ctx_mgr *mgr, int32_t priority,
ctx->reset_counter = atomic_read(&mgr->adev->gpu_reset_counter);
ctx->reset_counter_query = ctx->reset_counter;
ctx->vram_lost_counter = atomic_read(&mgr->adev->vram_lost_counter);
ctx->generation = amdgpu_vm_generation(mgr->adev, &fpriv->vm);
ctx->init_priority = priority;
ctx->override_priority = AMDGPU_CTX_PRIORITY_UNSET;
@@ -586,7 +586,7 @@ static int amdgpu_ctx_query2(struct amdgpu_device *adev,
if (ctx->reset_counter != atomic_read(&adev->gpu_reset_counter))
out->state.flags |= AMDGPU_CTX_QUERY2_FLAGS_RESET;
if (ctx->vram_lost_counter != atomic_read(&adev->vram_lost_counter))
if (ctx->generation != amdgpu_vm_generation(adev, &fpriv->vm))
out->state.flags |= AMDGPU_CTX_QUERY2_FLAGS_VRAMLOST;
if (atomic_read(&ctx->guilty))