Commit dead5e42 authored by Oak Zeng's avatar Oak Zeng Committed by Alex Deucher
Browse files

drm/amdgpu: Introduce functions for vram physical addr calculation 



Add one function to calculate BO's GPU physical address.
And another function to calculate BO's CPU physical address.

v2: Use functions vs macros (Christian)
    Use more proper function names (Christian)

Signed-off-by: default avatarOak Zeng <Oak.Zeng@amd.com>
Suggested-by: default avatarLijo Lazar <lijo.lazar@amd.com>
Reviewed-by: default avatarChristian König <christian.koenig@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 651a0321

drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c

+36 −0
Original line number Diff line number Diff line
@@ -685,3 +685,39 @@ void amdgpu_gmc_init_pdb0(struct amdgpu_device *adev) 
	/* Requires gart_ptb_gpu_pa to be 4K aligned */

	amdgpu_gmc_set_pte_pde(adev, adev->gmc.ptr_pdb0, i, gart_ptb_gpu_pa, flags);

}



/**

 * amdgpu_gmc_vram_mc2pa - calculate vram buffer's physical address from MC

 * address

 *

 * @adev: amdgpu_device pointer

 * @mc_addr: MC address of buffer

 */

uint64_t amdgpu_gmc_vram_mc2pa(struct amdgpu_device *adev, uint64_t mc_addr)

{

	return mc_addr - adev->gmc.vram_start + adev->vm_manager.vram_base_offset;

}



/**

 * amdgpu_gmc_vram_pa - calculate vram buffer object's physical address from

 * GPU's view

 *

 * @adev: amdgpu_device pointer

 * @bo: amdgpu buffer object

 */

uint64_t amdgpu_gmc_vram_pa(struct amdgpu_device *adev, struct amdgpu_bo *bo)

{

	return amdgpu_gmc_vram_mc2pa(adev, amdgpu_bo_gpu_offset(bo));

}



/**

 * amdgpu_gmc_vram_cpu_pa - calculate vram buffer object's physical address

 * from CPU's view

 *

 * @adev: amdgpu_device pointer

 * @bo: amdgpu buffer object

 */

uint64_t amdgpu_gmc_vram_cpu_pa(struct amdgpu_device *adev, struct amdgpu_bo *bo)

{

	return amdgpu_bo_gpu_offset(bo) - adev->gmc.vram_start + adev->gmc.aper_base;

}

drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.h

+3 −0
Original line number Diff line number Diff line
@@ -341,4 +341,7 @@ amdgpu_gmc_set_vm_fault_masks(struct amdgpu_device *adev, int hub_type, 
void amdgpu_gmc_get_vbios_allocations(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);

uint64_t amdgpu_gmc_vram_pa(struct amdgpu_device *adev, struct amdgpu_bo *bo);

uint64_t amdgpu_gmc_vram_cpu_pa(struct amdgpu_device *adev, struct amdgpu_bo *bo);

#endif