linux/drivers/gpu/drm/amd/amdgpu/amdgpu_csa.c

/*
 * Copyright 2016 Advanced Micro Devices, Inc.
 *
 * 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, sublicense,
 * 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 above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * 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 NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.

 * * Author: [email protected]
 */

#include <drm/drm_exec.h>

#include "amdgpu.h"

uint64_t amdgpu_csa_vaddr(struct amdgpu_device *adev)
{ … }

int amdgpu_allocate_static_csa(struct amdgpu_device *adev, struct amdgpu_bo **bo,
				u32 domain, uint32_t size)
{ … }

void amdgpu_free_static_csa(struct amdgpu_bo **bo)
{ … }

/*
 * amdgpu_map_static_csa should be called during amdgpu_vm_init
 * it maps virtual address amdgpu_csa_vaddr() to this VM, and each command
 * submission of GFX should use this virtual address within META_DATA init
 * package to support SRIOV gfx preemption.
 */
int amdgpu_map_static_csa(struct amdgpu_device *adev, struct amdgpu_vm *vm,
			  struct amdgpu_bo *bo, struct amdgpu_bo_va **bo_va,
			  uint64_t csa_addr, uint32_t size)
{ … }

int amdgpu_unmap_static_csa(struct amdgpu_device *adev, struct amdgpu_vm *vm,
			    struct amdgpu_bo *bo, struct amdgpu_bo_va *bo_va,
			    uint64_t csa_addr)
{ … }