From: Lang Yu Lang.Yu@amd.com

[ Upstream commit 4fac4fcf4500bce515b0f32195e7bb86aa0246c6 ]

The kfd_bo_list is used to restore process BOs after evictions. As page tables could be destroyed during evictions, we should also update pinned BOs' page tables during restoring to make sure they are valid.

So for pinned BOs, 1, Validate them and update their page tables. 2, Don't add eviction fence for them.

v2: - Don't handle pinned ones specially in BO validation.(Felix)

Signed-off-by: Lang Yu Lang.Yu@amd.com Acked-by: Christian König christian.koenig@amd.com Reviewed-by: Felix Kuehling Felix.Kuehling@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 13 ++++++------- 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c index cd89d2e46852..f4509656ea8c 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c @@ -1955,9 +1955,6 @@ int amdgpu_amdkfd_gpuvm_map_gtt_bo_to_kernel(struct amdgpu_device *adev, return -EINVAL; }

- /* delete kgd_mem from kfd_bo_list to avoid re-validating - * this BO in BO's restoring after eviction. - */ mutex_lock(&mem->process_info->lock);

ret = amdgpu_bo_reserve(bo, true); @@ -1980,7 +1977,6 @@ int amdgpu_amdkfd_gpuvm_map_gtt_bo_to_kernel(struct amdgpu_device *adev,

amdgpu_amdkfd_remove_eviction_fence( bo, mem->process_info->eviction_fence); - list_del_init(&mem->validate_list.head);

if (size) *size = amdgpu_bo_size(bo); @@ -2544,12 +2540,15 @@ int amdgpu_amdkfd_gpuvm_restore_process_bos(void *info, struct dma_fence **ef) process_info->eviction_fence = new_fence; *ef = dma_fence_get(&new_fence->base);

- /* Attach new eviction fence to all BOs */ + /* Attach new eviction fence to all BOs except pinned ones */ list_for_each_entry(mem, &process_info->kfd_bo_list, - validate_list.head) + validate_list.head) { + if (mem->bo->tbo.pin_count) + continue; + amdgpu_bo_fence(mem->bo, &process_info->eviction_fence->base, true); - + } /* Attach eviction fence to PD / PT BOs */ list_for_each_entry(peer_vm, &process_info->vm_list_head, vm_list_node) {