1 /* 2 * Copyright 2018 Advanced Micro Devices, Inc. 3 * All Rights Reserved. 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining a 6 * copy of this software and associated documentation files (the 7 * "Software"), to deal in the Software without restriction, including 8 * without limitation the rights to use, copy, modify, merge, publish, 9 * distribute, sub license, and/or sell copies of the Software, and to 10 * permit persons to whom the Software is furnished to do so, subject to 11 * the following conditions: 12 * 13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 15 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL 16 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, 17 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 18 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE 19 * USE OR OTHER DEALINGS IN THE SOFTWARE. 20 * 21 * The above copyright notice and this permission notice (including the 22 * next paragraph) shall be included in all copies or substantial portions 23 * of the Software. 24 * 25 */ 26 27 #include <linux/io-64-nonatomic-lo-hi.h> 28 29 #include "amdgpu.h" 30 31 /** 32 * amdgpu_gmc_get_pde_for_bo - get the PDE for a BO 33 * 34 * @bo: the BO to get the PDE for 35 * @level: the level in the PD hirarchy 36 * @addr: resulting addr 37 * @flags: resulting flags 38 * 39 * Get the address and flags to be used for a PDE (Page Directory Entry). 40 */ 41 void amdgpu_gmc_get_pde_for_bo(struct amdgpu_bo *bo, int level, 42 uint64_t *addr, uint64_t *flags) 43 { 44 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev); 45 struct ttm_dma_tt *ttm; 46 47 switch (bo->tbo.mem.mem_type) { 48 case TTM_PL_TT: 49 ttm = container_of(bo->tbo.ttm, struct ttm_dma_tt, ttm); 50 *addr = ttm->dma_address[0]; 51 break; 52 case TTM_PL_VRAM: 53 *addr = amdgpu_bo_gpu_offset(bo); 54 break; 55 default: 56 *addr = 0; 57 break; 58 } 59 *flags = amdgpu_ttm_tt_pde_flags(bo->tbo.ttm, &bo->tbo.mem); 60 amdgpu_gmc_get_vm_pde(adev, level, addr, flags); 61 } 62 63 /** 64 * amdgpu_gmc_pd_addr - return the address of the root directory 65 * 66 */ 67 uint64_t amdgpu_gmc_pd_addr(struct amdgpu_bo *bo) 68 { 69 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev); 70 uint64_t pd_addr; 71 72 /* TODO: move that into ASIC specific code */ 73 if (adev->asic_type >= CHIP_VEGA10) { 74 uint64_t flags = AMDGPU_PTE_VALID; 75 76 amdgpu_gmc_get_pde_for_bo(bo, -1, &pd_addr, &flags); 77 pd_addr |= flags; 78 } else { 79 pd_addr = amdgpu_bo_gpu_offset(bo); 80 } 81 return pd_addr; 82 } 83 84 /** 85 * amdgpu_gmc_set_pte_pde - update the page tables using CPU 86 * 87 * @adev: amdgpu_device pointer 88 * @cpu_pt_addr: cpu address of the page table 89 * @gpu_page_idx: entry in the page table to update 90 * @addr: dst addr to write into pte/pde 91 * @flags: access flags 92 * 93 * Update the page tables using CPU. 94 */ 95 int amdgpu_gmc_set_pte_pde(struct amdgpu_device *adev, void *cpu_pt_addr, 96 uint32_t gpu_page_idx, uint64_t addr, 97 uint64_t flags) 98 { 99 void __iomem *ptr = (void *)cpu_pt_addr; 100 uint64_t value; 101 102 /* 103 * The following is for PTE only. GART does not have PDEs. 104 */ 105 value = addr & 0x0000FFFFFFFFF000ULL; 106 value |= flags; 107 writeq(value, ptr + (gpu_page_idx * 8)); 108 return 0; 109 } 110 111 /** 112 * amdgpu_gmc_agp_addr - return the address in the AGP address space 113 * 114 * @tbo: TTM BO which needs the address, must be in GTT domain 115 * 116 * Tries to figure out how to access the BO through the AGP aperture. Returns 117 * AMDGPU_BO_INVALID_OFFSET if that is not possible. 118 */ 119 uint64_t amdgpu_gmc_agp_addr(struct ttm_buffer_object *bo) 120 { 121 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev); 122 struct ttm_dma_tt *ttm; 123 124 if (bo->num_pages != 1 || bo->ttm->caching_state == tt_cached) 125 return AMDGPU_BO_INVALID_OFFSET; 126 127 ttm = container_of(bo->ttm, struct ttm_dma_tt, ttm); 128 if (ttm->dma_address[0] + PAGE_SIZE >= adev->gmc.agp_size) 129 return AMDGPU_BO_INVALID_OFFSET; 130 131 return adev->gmc.agp_start + ttm->dma_address[0]; 132 } 133 134 /** 135 * amdgpu_gmc_vram_location - try to find VRAM location 136 * 137 * @adev: amdgpu device structure holding all necessary informations 138 * @mc: memory controller structure holding memory informations 139 * @base: base address at which to put VRAM 140 * 141 * Function will try to place VRAM at base address provided 142 * as parameter. 143 */ 144 void amdgpu_gmc_vram_location(struct amdgpu_device *adev, struct amdgpu_gmc *mc, 145 u64 base) 146 { 147 uint64_t limit = (uint64_t)amdgpu_vram_limit << 20; 148 149 mc->vram_start = base; 150 mc->vram_end = mc->vram_start + mc->mc_vram_size - 1; 151 if (limit && limit < mc->real_vram_size) 152 mc->real_vram_size = limit; 153 154 if (mc->xgmi.num_physical_nodes == 0) { 155 mc->fb_start = mc->vram_start; 156 mc->fb_end = mc->vram_end; 157 } 158 dev_info(adev->dev, "VRAM: %lluM 0x%016llX - 0x%016llX (%lluM used)\n", 159 mc->mc_vram_size >> 20, mc->vram_start, 160 mc->vram_end, mc->real_vram_size >> 20); 161 } 162 163 /** 164 * amdgpu_gmc_gart_location - try to find GART location 165 * 166 * @adev: amdgpu device structure holding all necessary informations 167 * @mc: memory controller structure holding memory informations 168 * 169 * Function will place try to place GART before or after VRAM. 170 * 171 * If GART size is bigger than space left then we ajust GART size. 172 * Thus function will never fails. 173 */ 174 void amdgpu_gmc_gart_location(struct amdgpu_device *adev, struct amdgpu_gmc *mc) 175 { 176 const uint64_t four_gb = 0x100000000ULL; 177 u64 size_af, size_bf; 178 /*To avoid the hole, limit the max mc address to AMDGPU_GMC_HOLE_START*/ 179 u64 max_mc_address = min(adev->gmc.mc_mask, AMDGPU_GMC_HOLE_START - 1); 180 181 mc->gart_size += adev->pm.smu_prv_buffer_size; 182 183 /* VCE doesn't like it when BOs cross a 4GB segment, so align 184 * the GART base on a 4GB boundary as well. 185 */ 186 size_bf = mc->fb_start; 187 size_af = max_mc_address + 1 - ALIGN(mc->fb_end + 1, four_gb); 188 189 if (mc->gart_size > max(size_bf, size_af)) { 190 dev_warn(adev->dev, "limiting GART\n"); 191 mc->gart_size = max(size_bf, size_af); 192 } 193 194 if ((size_bf >= mc->gart_size && size_bf < size_af) || 195 (size_af < mc->gart_size)) 196 mc->gart_start = 0; 197 else 198 mc->gart_start = max_mc_address - mc->gart_size + 1; 199 200 mc->gart_start &= ~(four_gb - 1); 201 mc->gart_end = mc->gart_start + mc->gart_size - 1; 202 dev_info(adev->dev, "GART: %lluM 0x%016llX - 0x%016llX\n", 203 mc->gart_size >> 20, mc->gart_start, mc->gart_end); 204 } 205 206 /** 207 * amdgpu_gmc_agp_location - try to find AGP location 208 * @adev: amdgpu device structure holding all necessary informations 209 * @mc: memory controller structure holding memory informations 210 * 211 * Function will place try to find a place for the AGP BAR in the MC address 212 * space. 213 * 214 * AGP BAR will be assigned the largest available hole in the address space. 215 * Should be called after VRAM and GART locations are setup. 216 */ 217 void amdgpu_gmc_agp_location(struct amdgpu_device *adev, struct amdgpu_gmc *mc) 218 { 219 const uint64_t sixteen_gb = 1ULL << 34; 220 const uint64_t sixteen_gb_mask = ~(sixteen_gb - 1); 221 u64 size_af, size_bf; 222 223 if (amdgpu_sriov_vf(adev)) { 224 mc->agp_start = 0xffffffff; 225 mc->agp_end = 0x0; 226 mc->agp_size = 0; 227 228 return; 229 } 230 231 if (mc->fb_start > mc->gart_start) { 232 size_bf = (mc->fb_start & sixteen_gb_mask) - 233 ALIGN(mc->gart_end + 1, sixteen_gb); 234 size_af = mc->mc_mask + 1 - ALIGN(mc->fb_end + 1, sixteen_gb); 235 } else { 236 size_bf = mc->fb_start & sixteen_gb_mask; 237 size_af = (mc->gart_start & sixteen_gb_mask) - 238 ALIGN(mc->fb_end + 1, sixteen_gb); 239 } 240 241 if (size_bf > size_af) { 242 mc->agp_start = (mc->fb_start - size_bf) & sixteen_gb_mask; 243 mc->agp_size = size_bf; 244 } else { 245 mc->agp_start = ALIGN(mc->fb_end + 1, sixteen_gb); 246 mc->agp_size = size_af; 247 } 248 249 mc->agp_end = mc->agp_start + mc->agp_size - 1; 250 dev_info(adev->dev, "AGP: %lluM 0x%016llX - 0x%016llX\n", 251 mc->agp_size >> 20, mc->agp_start, mc->agp_end); 252 } 253 254 /** 255 * amdgpu_gmc_filter_faults - filter VM faults 256 * 257 * @adev: amdgpu device structure 258 * @addr: address of the VM fault 259 * @pasid: PASID of the process causing the fault 260 * @timestamp: timestamp of the fault 261 * 262 * Returns: 263 * True if the fault was filtered and should not be processed further. 264 * False if the fault is a new one and needs to be handled. 265 */ 266 bool amdgpu_gmc_filter_faults(struct amdgpu_device *adev, uint64_t addr, 267 uint16_t pasid, uint64_t timestamp) 268 { 269 struct amdgpu_gmc *gmc = &adev->gmc; 270 271 uint64_t stamp, key = addr << 4 | pasid; 272 struct amdgpu_gmc_fault *fault; 273 uint32_t hash; 274 275 /* If we don't have space left in the ring buffer return immediately */ 276 stamp = max(timestamp, AMDGPU_GMC_FAULT_TIMEOUT + 1) - 277 AMDGPU_GMC_FAULT_TIMEOUT; 278 if (gmc->fault_ring[gmc->last_fault].timestamp >= stamp) 279 return true; 280 281 /* Try to find the fault in the hash */ 282 hash = hash_64(key, AMDGPU_GMC_FAULT_HASH_ORDER); 283 fault = &gmc->fault_ring[gmc->fault_hash[hash].idx]; 284 while (fault->timestamp >= stamp) { 285 uint64_t tmp; 286 287 if (fault->key == key) 288 return true; 289 290 tmp = fault->timestamp; 291 fault = &gmc->fault_ring[fault->next]; 292 293 /* Check if the entry was reused */ 294 if (fault->timestamp >= tmp) 295 break; 296 } 297 298 /* Add the fault to the ring */ 299 fault = &gmc->fault_ring[gmc->last_fault]; 300 fault->key = key; 301 fault->timestamp = timestamp; 302 303 /* And update the hash */ 304 fault->next = gmc->fault_hash[hash].idx; 305 gmc->fault_hash[hash].idx = gmc->last_fault++; 306 return false; 307 } 308