OpenCloudOS-Kernel/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c

/*
 * Copyright 2018 Advanced Micro Devices, Inc.
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
 * USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 *
 */

#include "amdgpu.h"

/**
 * amdgpu_gmc_get_pde_for_bo - get the PDE for a BO
 *
 * @bo: the BO to get the PDE for
 * @level: the level in the PD hirarchy
 * @addr: resulting addr
 * @flags: resulting flags
 *
 * Get the address and flags to be used for a PDE (Page Directory Entry).
 */
void amdgpu_gmc_get_pde_for_bo(struct amdgpu_bo *bo, int level,
			       uint64_t *addr, uint64_t *flags)
{
	struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
	struct ttm_dma_tt *ttm;

	switch (bo->tbo.mem.mem_type) {
	case TTM_PL_TT:
		ttm = container_of(bo->tbo.ttm, struct ttm_dma_tt, ttm);
		*addr = ttm->dma_address[0];
		break;
	case TTM_PL_VRAM:
		*addr = amdgpu_bo_gpu_offset(bo);
		break;
	default:
		*addr = 0;
		break;
	}
	*flags = amdgpu_ttm_tt_pde_flags(bo->tbo.ttm, &bo->tbo.mem);
	amdgpu_gmc_get_vm_pde(adev, level, addr, flags);
}

/**
 * amdgpu_gmc_pd_addr - return the address of the root directory
 *
 */
uint64_t amdgpu_gmc_pd_addr(struct amdgpu_bo *bo)
{
	struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
	uint64_t pd_addr;

	/* TODO: move that into ASIC specific code */
	if (adev->asic_type >= CHIP_VEGA10) {
		uint64_t flags = AMDGPU_PTE_VALID;

		amdgpu_gmc_get_pde_for_bo(bo, -1, &pd_addr, &flags);
		pd_addr |= flags;
	} else {
		pd_addr = amdgpu_bo_gpu_offset(bo);
	}
	return pd_addr;
}