1/*
  2 * Copyright 2016 Advanced Micro Devices, Inc.
  3 *
  4 * Permission is hereby granted, free of charge, to any person obtaining a
  5 * copy of this software and associated documentation files (the "Software"),
  6 * to deal in the Software without restriction, including without limitation
  7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  8 * and/or sell copies of the Software, and to permit persons to whom the
  9 * Software is furnished to do so, subject to the following conditions:
 10 *
 11 * The above copyright notice and this permission notice shall be included in
 12 * all copies or substantial portions of the Software.
 13 *
 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 20 * OTHER DEALINGS IN THE SOFTWARE.
 21
 22 * * Author: Monk.liu@amd.com
 23 */
 24
 25#include "amdgpu.h"
 26
 27uint64_t amdgpu_csa_vaddr(struct amdgpu_device *adev)
 28{
 29	uint64_t addr = adev->vm_manager.max_pfn << AMDGPU_GPU_PAGE_SHIFT;
 30
 31	addr -= AMDGPU_VA_RESERVED_SIZE;
 32	addr = amdgpu_gmc_sign_extend(addr);
 33
 34	return addr;
 35}
 36
 37int amdgpu_allocate_static_csa(struct amdgpu_device *adev, struct amdgpu_bo **bo,
 38				u32 domain, uint32_t size)
 39{
 40	int r;
 41	void *ptr;
 42
 43	r = amdgpu_bo_create_kernel(adev, size, PAGE_SIZE,
 44				domain, bo,
 45				NULL, &ptr);
 46	if (!*bo)
 47		return -ENOMEM;
 48
 49	memset(ptr, 0, size);
 50	adev->virt.csa_cpu_addr = ptr;
 51	return 0;
 52}
 53
 54void amdgpu_free_static_csa(struct amdgpu_bo **bo)
 55{
 56	amdgpu_bo_free_kernel(bo, NULL, NULL);
 57}
 58
 59/*
 60 * amdgpu_map_static_csa should be called during amdgpu_vm_init
 61 * it maps virtual address amdgpu_csa_vaddr() to this VM, and each command
 62 * submission of GFX should use this virtual address within META_DATA init
 63 * package to support SRIOV gfx preemption.
 64 */
 65int amdgpu_map_static_csa(struct amdgpu_device *adev, struct amdgpu_vm *vm,
 66			  struct amdgpu_bo *bo, struct amdgpu_bo_va **bo_va,
 67			  uint64_t csa_addr, uint32_t size)
 68{
 69	struct ww_acquire_ctx ticket;
 70	struct list_head list;
 71	struct amdgpu_bo_list_entry pd;
 72	struct ttm_validate_buffer csa_tv;
 73	int r;
 74
 75	INIT_LIST_HEAD(&list);
 76	INIT_LIST_HEAD(&csa_tv.head);
 77	csa_tv.bo = &bo->tbo;
 78	csa_tv.num_shared = 1;
 79
 80	list_add(&csa_tv.head, &list);
 81	amdgpu_vm_get_pd_bo(vm, &list, &pd);
 82
 83	r = ttm_eu_reserve_buffers(&ticket, &list, true, NULL, false);
 84	if (r) {
 85		DRM_ERROR("failed to reserve CSA,PD BOs: err=%d\n", r);
 86		return r;
 87	}
 88
 89	*bo_va = amdgpu_vm_bo_add(adev, vm, bo);
 90	if (!*bo_va) {
 91		ttm_eu_backoff_reservation(&ticket, &list);
 92		DRM_ERROR("failed to create bo_va for static CSA\n");
 93		return -ENOMEM;
 94	}
 95
 96	r = amdgpu_vm_bo_map(adev, *bo_va, csa_addr, 0, size,
 97			     AMDGPU_PTE_READABLE | AMDGPU_PTE_WRITEABLE |
 98			     AMDGPU_PTE_EXECUTABLE);
 99
100	if (r) {
101		DRM_ERROR("failed to do bo_map on static CSA, err=%d\n", r);
102		amdgpu_vm_bo_rmv(adev, *bo_va);
103		ttm_eu_backoff_reservation(&ticket, &list);
104		return r;
105	}
106
107	ttm_eu_backoff_reservation(&ticket, &list);
108	return 0;
109}