diff options
| author | Xiaogang Chen <Xiaogang.Chen@amd.com> | 2023-04-21 13:35:01 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2023-04-24 18:36:31 -0400 |
| commit | 3af470cbcc9f40e47fe9b16882f60cd20b438095 (patch) | |
| tree | 8bf58ebeb0b75fc0a8a22e3a742a77bb4783654e /drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | |
| parent | 9fa8cc0c444562fa19e20ca20f1c70e15b9d8c13 (diff) | |
drm/amdkfd: Fix an issue at userptr buffer validation process.
amdgpu_ttm_tt_get_user_pages can fail(-EFAULT). If it failed mem has no associated
hmm range or user_pages associated. Keep it at process_info->userptr_inval_list and
mark mem->invalid until following scheduled attempts can valid it.
Signed-off-by: Xiaogang Chen <Xiaogang.Chen@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 22 |
1 files changed, 18 insertions, 4 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c index 83a83ced2439..4432e169fae8 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c @@ -2445,7 +2445,9 @@ static int update_invalid_user_pages(struct amdkfd_process_info *process_info, ret = -EAGAIN; goto unlock_out; } - mem->invalid = 0; + /* set mem valid if mem has hmm range associated */ + if (mem->range) + mem->invalid = 0; } unlock_out: @@ -2577,8 +2579,15 @@ static int confirm_valid_user_pages_locked(struct amdkfd_process_info *process_i list_for_each_entry_safe(mem, tmp_mem, &process_info->userptr_inval_list, validate_list.head) { - bool valid = amdgpu_ttm_tt_get_user_pages_done( - mem->bo->tbo.ttm, mem->range); + bool valid; + + /* keep mem without hmm range at userptr_inval_list */ + if (!mem->range) + continue; + + /* Only check mem with hmm range associated */ + valid = amdgpu_ttm_tt_get_user_pages_done( + mem->bo->tbo.ttm, mem->range); mem->range = NULL; if (!valid) { @@ -2586,7 +2595,12 @@ static int confirm_valid_user_pages_locked(struct amdkfd_process_info *process_i ret = -EAGAIN; continue; } - WARN(mem->invalid, "Valid BO is marked invalid"); + + if (mem->invalid) { + WARN(1, "Valid BO is marked invalid"); + ret = -EAGAIN; + continue; + } list_move_tail(&mem->validate_list.head, &process_info->userptr_valid_list); |