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drm/amdgpu: introduce a stolen reserved buffer to protect specific buffer region (v2)

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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>
This commit is contained in:
Huang Rui
2020-12-16 17:21:27 +08:00
committed by Alex Deucher
parent cba00ce82d
commit e15a5fb9b6
5 changed files with 32 additions and 0 deletions
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1
drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.h
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@@ -332,6 +332,7 @@ amdgpu_gmc_set_vm_fault_masks(struct amdgpu_device *adev, int hub_type,
bool enable);
void amdgpu_gmc_get_vbios_allocations(struct amdgpu_device *adev);
void amdgpu_gmc_get_reserved_allocation(struct amdgpu_device *adev);
void amdgpu_gmc_init_pdb0(struct amdgpu_device *adev);
uint64_t amdgpu_gmc_vram_mc2pa(struct amdgpu_device *adev, uint64_t mc_addr);