drm/amdgpu/gpuvm: add some additional comments in amdgpu_vm_update_ptes (8863baef) · Commits · 戴 / test

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

+9 −1

Original line number	Diff line number	Diff line
		@@ -1418,6 +1418,9 @@ static int amdgpu_vm_update_ptes(struct amdgpu_vm_update_params *params,
		uint64_t incr, entry_end, pe_start;
		struct amdgpu_bo *pt;

		/* make sure that the page tables covering the address range are
		* actually allocated
		*/
		r = amdgpu_vm_alloc_pts(params->adev, params->vm, &cursor,
		params->direct);
		if (r)
		@@ -1491,7 +1494,12 @@ static int amdgpu_vm_update_ptes(struct amdgpu_vm_update_params *params,
		} while (frag_start < entry_end);

		if (amdgpu_vm_pt_descendant(adev, &cursor)) {
		/* Free all child entries */
		/* Free all child entries.
		* Update the tables with the flags and addresses and free up subsequent
		* tables in the case of huge pages or freed up areas.
		* This is the maximum you can free, because all other page tables are not
		* completely covered by the range and so potentially still in use.
		*/
		while (cursor.pfn < frag_start) {
		amdgpu_vm_free_pts(adev, params->vm, &cursor);
		amdgpu_vm_pt_next(adev, &cursor);