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

DEFINITIONS

1. amdgpu_csa_vaddr
2. amdgpu_allocate_static_csa
3. amdgpu_free_static_csa
4. amdgpu_map_static_csa

   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         adev->virt.csa_cpu_addr = ptr;
  51         return 0;
  52 }
  53 
  54 void 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  */
  65 int 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 }