diff options
| author | Huang Rui <ray.huang@amd.com> | 2020-12-16 17:21:27 +0800 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2021-06-04 16:03:12 -0400 |
| commit | e15a5fb9b6ac2556a4fe59dba5faa34c695e8b73 (patch) | |
| tree | 551a96ee3cb17952c9de6452d24da20e63e7a58d /drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | |
| parent | cba00ce82d348970cf20efaa042e0d4faa821217 (diff) | |
drm/amdgpu: introduce a stolen reserved buffer to protect specific buffer region (v2)
Some ASICs such as Yellow Carp needs to reserve a region of video memory
to avoid access from driver. So this patch is to introduce a stolen
reserved buffer to protect specific buffer region.
v2: free this buffer in amdgpu_ttm_fini.
Signed-off-by: Huang Rui <ray.huang@amd.com>
Acked-and-Tested-by: Aaron Liu <aaron.liu@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c index 832970cff64c..118911059dc1 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c @@ -1718,6 +1718,13 @@ int amdgpu_ttm_init(struct amdgpu_device *adev) NULL); if (r) return r; + r = amdgpu_bo_create_kernel_at(adev, adev->mman.stolen_reserved_offset, + adev->mman.stolen_reserved_size, + AMDGPU_GEM_DOMAIN_VRAM, + &adev->mman.stolen_reserved_memory, + NULL); + if (r) + return r; DRM_INFO("amdgpu: %uM of VRAM memory ready\n", (unsigned) (adev->gmc.real_vram_size / (1024 * 1024))); @@ -1787,6 +1794,9 @@ void amdgpu_ttm_fini(struct amdgpu_device *adev) amdgpu_bo_free_kernel(&adev->mman.stolen_extended_memory, NULL, NULL); /* return the IP Discovery TMR memory back to VRAM */ amdgpu_bo_free_kernel(&adev->mman.discovery_memory, NULL, NULL); + if (adev->mman.stolen_reserved_size) + amdgpu_bo_free_kernel(&adev->mman.stolen_reserved_memory, + NULL, NULL); amdgpu_ttm_fw_reserve_vram_fini(adev); amdgpu_vram_mgr_fini(adev); |