LXR linux/drivers/gpu/drm/amd/amdgpu/amdgpu

   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);
  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}
 110