/* * 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: Monk.liu@amd.com */ #include "amdgpu.h" uint64_t amdgpu_csa_vaddr(struct amdgpu_device *adev){	uint64_t addr = adev->vm_manager.max_pfn << AMDGPU_GPU_PAGE_SHIFT; 	addr -= AMDGPU_VA_RESERVED_SIZE;	addr = amdgpu_gmc_sign_extend(addr); 	return addr;} int amdgpu_allocate_static_csa(struct amdgpu_device *adev, struct amdgpu_bo **bo,				u32 domain, uint32_t size){	int r;	void *ptr; 	r = amdgpu_bo_create_kernel(adev, size, PAGE_SIZE,				domain, bo,				NULL, &ptr);	if (!*bo)		return -ENOMEM; 	memset(ptr, 0, size);	return 0;} void amdgpu_free_static_csa(struct amdgpu_bo **bo){	amdgpu_bo_free_kernel(bo, NULL, NULL);} /* * 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){	struct ww_acquire_ctx ticket;	struct list_head list;	struct amdgpu_bo_list_entry pd;	struct ttm_validate_buffer csa_tv;	int r; 	INIT_LIST_HEAD(&list);	INIT_LIST_HEAD(&csa_tv.head);	csa_tv.bo = &bo->tbo;	csa_tv.num_shared = 1; 	list_add(&csa_tv.head, &list);	amdgpu_vm_get_pd_bo(vm, &list, &pd); 	r = ttm_eu_reserve_buffers(&ticket, &list, true, NULL);	if (r) {		DRM_ERROR("failed to reserve CSA,PD BOs: err=%d\n", r);		return r;	} 	*bo_va = amdgpu_vm_bo_add(adev, vm, bo);	if (!*bo_va) {		ttm_eu_backoff_reservation(&ticket, &list);		DRM_ERROR("failed to create bo_va for static CSA\n");		return -ENOMEM;	} 	r = amdgpu_vm_bo_map(adev, *bo_va, csa_addr, 0, size,			     AMDGPU_PTE_READABLE | AMDGPU_PTE_WRITEABLE |			     AMDGPU_PTE_EXECUTABLE); 	if (r) {		DRM_ERROR("failed to do bo_map on static CSA, err=%d\n", r);		amdgpu_vm_bo_rmv(adev, *bo_va);		ttm_eu_backoff_reservation(&ticket, &list);		return r;	} 	ttm_eu_backoff_reservation(&ticket, &list);	return 0;}