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 */ 23 24 #include "amdgpu.h" 25 26 int amdgpu_allocate_static_csa(struct amdgpu_device *adev) 27 { 28 int r; 29 void *ptr; 30 31 r = amdgpu_bo_create_kernel(adev, AMDGPU_CSA_SIZE, PAGE_SIZE, 32 AMDGPU_GEM_DOMAIN_VRAM, &adev->virt.csa_obj, 33 &adev->virt.csa_vmid0_addr, &ptr); 34 if (r) 35 return r; 36 37 memset(ptr, 0, AMDGPU_CSA_SIZE); 38 return 0; 39 } 40 41 /* 42 * amdgpu_map_static_csa should be called during amdgpu_vm_init 43 * it maps virtual address "AMDGPU_VA_RESERVED_SIZE - AMDGPU_CSA_SIZE" 44 * to this VM, and each command submission of GFX should use this virtual 45 * address within META_DATA init package to support SRIOV gfx preemption. 46 */ 47 48 int amdgpu_map_static_csa(struct amdgpu_device *adev, struct amdgpu_vm *vm) 49 { 50 int r; 51 struct amdgpu_bo_va *bo_va; 52 struct ww_acquire_ctx ticket; 53 struct list_head list; 54 struct amdgpu_bo_list_entry pd; 55 struct ttm_validate_buffer csa_tv; 56 57 INIT_LIST_HEAD(&list); 58 INIT_LIST_HEAD(&csa_tv.head); 59 csa_tv.bo = &adev->virt.csa_obj->tbo; 60 csa_tv.shared = true; 61 62 list_add(&csa_tv.head, &list); 63 amdgpu_vm_get_pd_bo(vm, &list, &pd); 64 65 r = ttm_eu_reserve_buffers(&ticket, &list, true, NULL); 66 if (r) { 67 DRM_ERROR("failed to reserve CSA,PD BOs: err=%d\n", r); 68 return r; 69 } 70 71 bo_va = amdgpu_vm_bo_add(adev, vm, adev->virt.csa_obj); 72 if (!bo_va) { 73 ttm_eu_backoff_reservation(&ticket, &list); 74 DRM_ERROR("failed to create bo_va for static CSA\n"); 75 return -ENOMEM; 76 } 77 78 r = amdgpu_vm_alloc_pts(adev, bo_va->vm, AMDGPU_CSA_VADDR, 79 AMDGPU_CSA_SIZE); 80 if (r) { 81 DRM_ERROR("failed to allocate pts for static CSA, err=%d\n", r); 82 amdgpu_vm_bo_rmv(adev, bo_va); 83 ttm_eu_backoff_reservation(&ticket, &list); 84 return r; 85 } 86 87 r = amdgpu_vm_bo_map(adev, bo_va, AMDGPU_CSA_VADDR, 0,AMDGPU_CSA_SIZE, 88 AMDGPU_PTE_READABLE | AMDGPU_PTE_WRITEABLE | 89 AMDGPU_PTE_EXECUTABLE); 90 91 if (r) { 92 DRM_ERROR("failed to do bo_map on static CSA, err=%d\n", r); 93 amdgpu_vm_bo_rmv(adev, bo_va); 94 ttm_eu_backoff_reservation(&ticket, &list); 95 return r; 96 } 97 98 vm->csa_bo_va = bo_va; 99 ttm_eu_backoff_reservation(&ticket, &list); 100 return 0; 101 } 102 103 void amdgpu_virt_init_setting(struct amdgpu_device *adev) 104 { 105 /* enable virtual display */ 106 adev->mode_info.num_crtc = 1; 107 adev->enable_virtual_display = true; 108 109 mutex_init(&adev->virt.lock_kiq); 110 mutex_init(&adev->virt.lock_reset); 111 } 112 113 uint32_t amdgpu_virt_kiq_rreg(struct amdgpu_device *adev, uint32_t reg) 114 { 115 signed long r; 116 uint32_t val; 117 struct dma_fence *f; 118 struct amdgpu_kiq *kiq = &adev->gfx.kiq; 119 struct amdgpu_ring *ring = &kiq->ring; 120 121 BUG_ON(!ring->funcs->emit_rreg); 122 123 mutex_lock(&adev->virt.lock_kiq); 124 amdgpu_ring_alloc(ring, 32); 125 amdgpu_ring_emit_rreg(ring, reg); 126 amdgpu_fence_emit(ring, &f); 127 amdgpu_ring_commit(ring); 128 mutex_unlock(&adev->virt.lock_kiq); 129 130 r = dma_fence_wait(f, false); 131 if (r) 132 DRM_ERROR("wait for kiq fence error: %ld.\n", r); 133 dma_fence_put(f); 134 135 val = adev->wb.wb[adev->virt.reg_val_offs]; 136 137 return val; 138 } 139 140 void amdgpu_virt_kiq_wreg(struct amdgpu_device *adev, uint32_t reg, uint32_t v) 141 { 142 signed long r; 143 struct dma_fence *f; 144 struct amdgpu_kiq *kiq = &adev->gfx.kiq; 145 struct amdgpu_ring *ring = &kiq->ring; 146 147 BUG_ON(!ring->funcs->emit_wreg); 148 149 mutex_lock(&adev->virt.lock_kiq); 150 amdgpu_ring_alloc(ring, 32); 151 amdgpu_ring_emit_wreg(ring, reg, v); 152 amdgpu_fence_emit(ring, &f); 153 amdgpu_ring_commit(ring); 154 mutex_unlock(&adev->virt.lock_kiq); 155 156 r = dma_fence_wait(f, false); 157 if (r) 158 DRM_ERROR("wait for kiq fence error: %ld.\n", r); 159 dma_fence_put(f); 160 } 161 162 /** 163 * amdgpu_virt_request_full_gpu() - request full gpu access 164 * @amdgpu: amdgpu device. 165 * @init: is driver init time. 166 * When start to init/fini driver, first need to request full gpu access. 167 * Return: Zero if request success, otherwise will return error. 168 */ 169 int amdgpu_virt_request_full_gpu(struct amdgpu_device *adev, bool init) 170 { 171 struct amdgpu_virt *virt = &adev->virt; 172 int r; 173 174 if (virt->ops && virt->ops->req_full_gpu) { 175 r = virt->ops->req_full_gpu(adev, init); 176 if (r) 177 return r; 178 179 adev->virt.caps &= ~AMDGPU_SRIOV_CAPS_RUNTIME; 180 } 181 182 return 0; 183 } 184 185 /** 186 * amdgpu_virt_release_full_gpu() - release full gpu access 187 * @amdgpu: amdgpu device. 188 * @init: is driver init time. 189 * When finishing driver init/fini, need to release full gpu access. 190 * Return: Zero if release success, otherwise will returen error. 191 */ 192 int amdgpu_virt_release_full_gpu(struct amdgpu_device *adev, bool init) 193 { 194 struct amdgpu_virt *virt = &adev->virt; 195 int r; 196 197 if (virt->ops && virt->ops->rel_full_gpu) { 198 r = virt->ops->rel_full_gpu(adev, init); 199 if (r) 200 return r; 201 202 adev->virt.caps |= AMDGPU_SRIOV_CAPS_RUNTIME; 203 } 204 return 0; 205 } 206 207 /** 208 * amdgpu_virt_reset_gpu() - reset gpu 209 * @amdgpu: amdgpu device. 210 * Send reset command to GPU hypervisor to reset GPU that VM is using 211 * Return: Zero if reset success, otherwise will return error. 212 */ 213 int amdgpu_virt_reset_gpu(struct amdgpu_device *adev) 214 { 215 struct amdgpu_virt *virt = &adev->virt; 216 int r; 217 218 if (virt->ops && virt->ops->reset_gpu) { 219 r = virt->ops->reset_gpu(adev); 220 if (r) 221 return r; 222 223 adev->virt.caps &= ~AMDGPU_SRIOV_CAPS_RUNTIME; 224 } 225 226 return 0; 227 } 228 229 /** 230 * amdgpu_virt_alloc_mm_table() - alloc memory for mm table 231 * @amdgpu: amdgpu device. 232 * MM table is used by UVD and VCE for its initialization 233 * Return: Zero if allocate success. 234 */ 235 int amdgpu_virt_alloc_mm_table(struct amdgpu_device *adev) 236 { 237 int r; 238 239 if (!amdgpu_sriov_vf(adev) || adev->virt.mm_table.gpu_addr) 240 return 0; 241 242 r = amdgpu_bo_create_kernel(adev, PAGE_SIZE, PAGE_SIZE, 243 AMDGPU_GEM_DOMAIN_VRAM, 244 &adev->virt.mm_table.bo, 245 &adev->virt.mm_table.gpu_addr, 246 (void *)&adev->virt.mm_table.cpu_addr); 247 if (r) { 248 DRM_ERROR("failed to alloc mm table and error = %d.\n", r); 249 return r; 250 } 251 252 memset((void *)adev->virt.mm_table.cpu_addr, 0, PAGE_SIZE); 253 DRM_INFO("MM table gpu addr = 0x%llx, cpu addr = %p.\n", 254 adev->virt.mm_table.gpu_addr, 255 adev->virt.mm_table.cpu_addr); 256 return 0; 257 } 258 259 /** 260 * amdgpu_virt_free_mm_table() - free mm table memory 261 * @amdgpu: amdgpu device. 262 * Free MM table memory 263 */ 264 void amdgpu_virt_free_mm_table(struct amdgpu_device *adev) 265 { 266 if (!amdgpu_sriov_vf(adev) || !adev->virt.mm_table.gpu_addr) 267 return; 268 269 amdgpu_bo_free_kernel(&adev->virt.mm_table.bo, 270 &adev->virt.mm_table.gpu_addr, 271 (void *)&adev->virt.mm_table.cpu_addr); 272 adev->virt.mm_table.gpu_addr = 0; 273 } 274