From 834368eab36922595a402b9e76470f8efa2fac7f Mon Sep 17 00:00:00 2001 From: Philip Yang Date: Thu, 20 Jun 2024 12:31:36 -0400 Subject: drm/amdkfd: Ensure user queue buffers residency MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Add atomic queue_refcount to struct bo_va, return -EBUSY to fail unmap BO from the GPU if the bo_va queue_refcount is not zero. Create queue to increase the bo_va queue_refcount, destroy queue to decrease the bo_va queue_refcount, to ensure the queue buffers mapped on the GPU when queue is active. Signed-off-by: Philip Yang Reviewed-by: Felix Kuehling Acked-by: Christian König Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c') diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c index 0ab37e7aec26..6d5fd371d5ce 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c @@ -1252,7 +1252,7 @@ static int unreserve_bo_and_vms(struct bo_vm_reservation_context *ctx, return ret; } -static void unmap_bo_from_gpuvm(struct kgd_mem *mem, +static int unmap_bo_from_gpuvm(struct kgd_mem *mem, struct kfd_mem_attachment *entry, struct amdgpu_sync *sync) { @@ -1260,11 +1260,18 @@ static void unmap_bo_from_gpuvm(struct kgd_mem *mem, struct amdgpu_device *adev = entry->adev; struct amdgpu_vm *vm = bo_va->base.vm; + if (bo_va->queue_refcount) { + pr_debug("bo_va->queue_refcount %d\n", bo_va->queue_refcount); + return -EBUSY; + } + amdgpu_vm_bo_unmap(adev, bo_va, entry->va); amdgpu_vm_clear_freed(adev, vm, &bo_va->last_pt_update); amdgpu_sync_fence(sync, bo_va->last_pt_update); + + return 0; } static int update_gpuvm_pte(struct kgd_mem *mem, @@ -2191,7 +2198,10 @@ int amdgpu_amdkfd_gpuvm_unmap_memory_from_gpu( pr_debug("\t unmap VA 0x%llx - 0x%llx from entry %p\n", entry->va, entry->va + bo_size, entry); - unmap_bo_from_gpuvm(mem, entry, ctx.sync); + ret = unmap_bo_from_gpuvm(mem, entry, ctx.sync); + if (ret) + goto unreserve_out; + entry->is_mapped = false; mem->mapped_to_gpu_memory--; -- cgit v1.2.3-70-g09d2