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

   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
  27 uint64_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
  37 int 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         return 0;
  51 }
  52
  53 void amdgpu_free_static_csa(struct amdgpu_bo **bo)
  54 {
  55         amdgpu_bo_free_kernel(bo, NULL, NULL);
  56 }
  57
  58 /*
  59  * amdgpu_map_static_csa should be called during amdgpu_vm_init
  60  * it maps virtual address amdgpu_csa_vaddr() to this VM, and each command
  61  * submission of GFX should use this virtual address within META_DATA init
  62  * package to support SRIOV gfx preemption.
  63  */
  64 int amdgpu_map_static_csa(struct amdgpu_device *adev, struct amdgpu_vm *vm,
  65                           struct amdgpu_bo *bo, struct amdgpu_bo_va **bo_va,
  66                           uint64_t csa_addr, uint32_t size)
  67 {
  68         struct ww_acquire_ctx ticket;
  69         struct list_head list;
  70         struct amdgpu_bo_list_entry pd;
  71         struct ttm_validate_buffer csa_tv;
  72         int r;
  73
  74         INIT_LIST_HEAD(&list);
  75         INIT_LIST_HEAD(&csa_tv.head);
  76         csa_tv.bo = &bo->tbo;
  77         csa_tv.num_shared = 1;
  78
  79         list_add(&csa_tv.head, &list);
  80         amdgpu_vm_get_pd_bo(vm, &list, &pd);
  81
  82         r = ttm_eu_reserve_buffers(&ticket, &list, true, NULL);
  83         if (r) {
  84                 DRM_ERROR("failed to reserve CSA,PD BOs: err=%d\n", r);
  85                 return r;
  86         }
  87
  88         *bo_va = amdgpu_vm_bo_add(adev, vm, bo);
  89         if (!*bo_va) {
  90                 ttm_eu_backoff_reservation(&ticket, &list);
  91                 DRM_ERROR("failed to create bo_va for static CSA\n");
  92                 return -ENOMEM;
  93         }
  94
  95         r = amdgpu_vm_alloc_pts(adev, (*bo_va)->base.vm, csa_addr,
  96                                 size);
  97         if (r) {
  98                 DRM_ERROR("failed to allocate pts for static CSA, err=%d\n", r);
  99                 amdgpu_vm_bo_rmv(adev, *bo_va);
 100                 ttm_eu_backoff_reservation(&ticket, &list);
 101                 return r;
 102         }
 103
 104         r = amdgpu_vm_bo_map(adev, *bo_va, csa_addr, 0, size,
 105                              AMDGPU_PTE_READABLE | AMDGPU_PTE_WRITEABLE |
 106                              AMDGPU_PTE_EXECUTABLE);
 107
 108         if (r) {
 109                 DRM_ERROR("failed to do bo_map on static CSA, err=%d\n", r);
 110                 amdgpu_vm_bo_rmv(adev, *bo_va);
 111                 ttm_eu_backoff_reservation(&ticket, &list);
 112                 return r;
 113         }
 114
 115         ttm_eu_backoff_reservation(&ticket, &list);
 116         return 0;
 117 }