diff options
| author | Yong Zhao <Yong.Zhao@amd.com> | 2019-09-26 06:57:30 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2019-10-03 17:11:04 +0300 |
| commit | 56fc40aba4d9bc22ccbb8ce88a1c41f666d04f05 (patch) | |
| tree | 5047bac876d499703715286c831c39f2420c0784 /drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v9.h | |
| parent | 3fe023d42ea82be7d32ad26ab9409d970c1d361f (diff) | |
| download | linux-56fc40aba4d9bc22ccbb8ce88a1c41f666d04f05.tar.xz | |
drm/amdkfd: Eliminate get_atc_vmid_pasid_mapping_valid
get_atc_vmid_pasid_mapping_valid() is very similar to
get_atc_vmid_pasid_mapping_pasid(), so they can be merged into a new
function get_atc_vmid_pasid_mapping_info() to reduce register access
times. More importantly, getting the PASID and the valid bit atomically
with a single read fixes some potential race conditions where the
mapping changes between the two reads.
Signed-off-by: Yong Zhao <Yong.Zhao@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_gfx_v9.h')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v9.h | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v9.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v9.h index 225bf64001e4..d9e9ad22b2bd 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v9.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v9.h @@ -55,10 +55,8 @@ uint32_t kgd_gfx_v9_address_watch_get_offset(struct kgd_dev *kgd, unsigned int watch_point_id, unsigned int reg_offset); -bool kgd_gfx_v9_get_atc_vmid_pasid_mapping_valid(struct kgd_dev *kgd, - uint8_t vmid); -uint16_t kgd_gfx_v9_get_atc_vmid_pasid_mapping_pasid(struct kgd_dev *kgd, - uint8_t vmid); +bool kgd_gfx_v9_get_atc_vmid_pasid_mapping_info(struct kgd_dev *kgd, + uint8_t vmid, uint16_t *p_pasid); void kgd_gfx_v9_set_vm_context_page_table_base(struct kgd_dev *kgd, uint32_t vmid, uint64_t page_table_base); int kgd_gfx_v9_invalidate_tlbs(struct kgd_dev *kgd, uint16_t pasid); |