1 /* 2 * Copyright(c) 2011-2016 Intel Corporation. All rights reserved. 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 (including the next 12 * paragraph) shall be included in all copies or substantial portions of the 13 * Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 21 * SOFTWARE. 22 * 23 * Authors: 24 * Eddie Dong <eddie.dong@intel.com> 25 * Kevin Tian <kevin.tian@intel.com> 26 * 27 * Contributors: 28 * Ping Gao <ping.a.gao@intel.com> 29 * Zhi Wang <zhi.a.wang@intel.com> 30 * Bing Niu <bing.niu@intel.com> 31 * 32 */ 33 34 #include "i915_drv.h" 35 #include "gvt.h" 36 #include "i915_pvinfo.h" 37 38 void populate_pvinfo_page(struct intel_vgpu *vgpu) 39 { 40 /* setup the ballooning information */ 41 vgpu_vreg64(vgpu, vgtif_reg(magic)) = VGT_MAGIC; 42 vgpu_vreg(vgpu, vgtif_reg(version_major)) = 1; 43 vgpu_vreg(vgpu, vgtif_reg(version_minor)) = 0; 44 vgpu_vreg(vgpu, vgtif_reg(display_ready)) = 0; 45 vgpu_vreg(vgpu, vgtif_reg(vgt_id)) = vgpu->id; 46 vgpu_vreg(vgpu, vgtif_reg(avail_rs.mappable_gmadr.base)) = 47 vgpu_aperture_gmadr_base(vgpu); 48 vgpu_vreg(vgpu, vgtif_reg(avail_rs.mappable_gmadr.size)) = 49 vgpu_aperture_sz(vgpu); 50 vgpu_vreg(vgpu, vgtif_reg(avail_rs.nonmappable_gmadr.base)) = 51 vgpu_hidden_gmadr_base(vgpu); 52 vgpu_vreg(vgpu, vgtif_reg(avail_rs.nonmappable_gmadr.size)) = 53 vgpu_hidden_sz(vgpu); 54 55 vgpu_vreg(vgpu, vgtif_reg(avail_rs.fence_num)) = vgpu_fence_sz(vgpu); 56 57 gvt_dbg_core("Populate PVINFO PAGE for vGPU %d\n", vgpu->id); 58 gvt_dbg_core("aperture base [GMADR] 0x%llx size 0x%llx\n", 59 vgpu_aperture_gmadr_base(vgpu), vgpu_aperture_sz(vgpu)); 60 gvt_dbg_core("hidden base [GMADR] 0x%llx size=0x%llx\n", 61 vgpu_hidden_gmadr_base(vgpu), vgpu_hidden_sz(vgpu)); 62 gvt_dbg_core("fence size %d\n", vgpu_fence_sz(vgpu)); 63 64 WARN_ON(sizeof(struct vgt_if) != VGT_PVINFO_SIZE); 65 } 66 67 /** 68 * intel_gvt_init_vgpu_types - initialize vGPU type list 69 * @gvt : GVT device 70 * 71 * Initialize vGPU type list based on available resource. 72 * 73 */ 74 int intel_gvt_init_vgpu_types(struct intel_gvt *gvt) 75 { 76 unsigned int num_types; 77 unsigned int i, low_avail; 78 unsigned int min_low; 79 80 /* vGPU type name is defined as GVTg_Vx_y which contains 81 * physical GPU generation type and 'y' means maximum vGPU 82 * instances user can create on one physical GPU for this 83 * type. 84 * 85 * Depend on physical SKU resource, might see vGPU types like 86 * GVTg_V4_8, GVTg_V4_4, GVTg_V4_2, etc. We can create 87 * different types of vGPU on same physical GPU depending on 88 * available resource. Each vGPU type will have "avail_instance" 89 * to indicate how many vGPU instance can be created for this 90 * type. 91 * 92 * Currently use static size here as we init type earlier.. 93 */ 94 low_avail = MB_TO_BYTES(256) - HOST_LOW_GM_SIZE; 95 num_types = 4; 96 97 gvt->types = kzalloc(num_types * sizeof(struct intel_vgpu_type), 98 GFP_KERNEL); 99 if (!gvt->types) 100 return -ENOMEM; 101 102 min_low = MB_TO_BYTES(32); 103 for (i = 0; i < num_types; ++i) { 104 if (low_avail / min_low == 0) 105 break; 106 gvt->types[i].low_gm_size = min_low; 107 gvt->types[i].high_gm_size = max((min_low<<3), MB_TO_BYTES(384U)); 108 gvt->types[i].fence = 4; 109 gvt->types[i].max_instance = low_avail / min_low; 110 gvt->types[i].avail_instance = gvt->types[i].max_instance; 111 112 if (IS_GEN8(gvt->dev_priv)) 113 sprintf(gvt->types[i].name, "GVTg_V4_%u", 114 gvt->types[i].max_instance); 115 else if (IS_GEN9(gvt->dev_priv)) 116 sprintf(gvt->types[i].name, "GVTg_V5_%u", 117 gvt->types[i].max_instance); 118 119 min_low <<= 1; 120 gvt_dbg_core("type[%d]: %s max %u avail %u low %u high %u fence %u\n", 121 i, gvt->types[i].name, gvt->types[i].max_instance, 122 gvt->types[i].avail_instance, 123 gvt->types[i].low_gm_size, 124 gvt->types[i].high_gm_size, gvt->types[i].fence); 125 } 126 127 gvt->num_types = i; 128 return 0; 129 } 130 131 void intel_gvt_clean_vgpu_types(struct intel_gvt *gvt) 132 { 133 kfree(gvt->types); 134 } 135 136 static void intel_gvt_update_vgpu_types(struct intel_gvt *gvt) 137 { 138 int i; 139 unsigned int low_gm_avail, high_gm_avail, fence_avail; 140 unsigned int low_gm_min, high_gm_min, fence_min, total_min; 141 142 /* Need to depend on maxium hw resource size but keep on 143 * static config for now. 144 */ 145 low_gm_avail = MB_TO_BYTES(256) - HOST_LOW_GM_SIZE - 146 gvt->gm.vgpu_allocated_low_gm_size; 147 high_gm_avail = MB_TO_BYTES(256) * 8UL - HOST_HIGH_GM_SIZE - 148 gvt->gm.vgpu_allocated_high_gm_size; 149 fence_avail = gvt_fence_sz(gvt) - HOST_FENCE - 150 gvt->fence.vgpu_allocated_fence_num; 151 152 for (i = 0; i < gvt->num_types; i++) { 153 low_gm_min = low_gm_avail / gvt->types[i].low_gm_size; 154 high_gm_min = high_gm_avail / gvt->types[i].high_gm_size; 155 fence_min = fence_avail / gvt->types[i].fence; 156 total_min = min(min(low_gm_min, high_gm_min), fence_min); 157 gvt->types[i].avail_instance = min(gvt->types[i].max_instance, 158 total_min); 159 160 gvt_dbg_core("update type[%d]: %s max %u avail %u low %u high %u fence %u\n", 161 i, gvt->types[i].name, gvt->types[i].max_instance, 162 gvt->types[i].avail_instance, gvt->types[i].low_gm_size, 163 gvt->types[i].high_gm_size, gvt->types[i].fence); 164 } 165 } 166 167 /** 168 * intel_gvt_destroy_vgpu - destroy a virtual GPU 169 * @vgpu: virtual GPU 170 * 171 * This function is called when user wants to destroy a virtual GPU. 172 * 173 */ 174 void intel_gvt_destroy_vgpu(struct intel_vgpu *vgpu) 175 { 176 struct intel_gvt *gvt = vgpu->gvt; 177 178 mutex_lock(&gvt->lock); 179 180 vgpu->active = false; 181 idr_remove(&gvt->vgpu_idr, vgpu->id); 182 183 if (atomic_read(&vgpu->running_workload_num)) { 184 mutex_unlock(&gvt->lock); 185 intel_gvt_wait_vgpu_idle(vgpu); 186 mutex_lock(&gvt->lock); 187 } 188 189 intel_vgpu_stop_schedule(vgpu); 190 intel_vgpu_clean_sched_policy(vgpu); 191 intel_vgpu_clean_gvt_context(vgpu); 192 intel_vgpu_clean_execlist(vgpu); 193 intel_vgpu_clean_display(vgpu); 194 intel_vgpu_clean_opregion(vgpu); 195 intel_vgpu_clean_gtt(vgpu); 196 intel_gvt_hypervisor_detach_vgpu(vgpu); 197 intel_vgpu_free_resource(vgpu); 198 intel_vgpu_clean_mmio(vgpu); 199 vfree(vgpu); 200 201 intel_gvt_update_vgpu_types(gvt); 202 mutex_unlock(&gvt->lock); 203 } 204 205 static struct intel_vgpu *__intel_gvt_create_vgpu(struct intel_gvt *gvt, 206 struct intel_vgpu_creation_params *param) 207 { 208 struct intel_vgpu *vgpu; 209 int ret; 210 211 gvt_dbg_core("handle %llu low %llu MB high %llu MB fence %llu\n", 212 param->handle, param->low_gm_sz, param->high_gm_sz, 213 param->fence_sz); 214 215 vgpu = vzalloc(sizeof(*vgpu)); 216 if (!vgpu) 217 return ERR_PTR(-ENOMEM); 218 219 mutex_lock(&gvt->lock); 220 221 ret = idr_alloc(&gvt->vgpu_idr, vgpu, 1, GVT_MAX_VGPU, GFP_KERNEL); 222 if (ret < 0) 223 goto out_free_vgpu; 224 225 vgpu->id = ret; 226 vgpu->handle = param->handle; 227 vgpu->gvt = gvt; 228 bitmap_zero(vgpu->tlb_handle_pending, I915_NUM_ENGINES); 229 230 intel_vgpu_init_cfg_space(vgpu, param->primary); 231 232 ret = intel_vgpu_init_mmio(vgpu); 233 if (ret) 234 goto out_clean_idr; 235 236 ret = intel_vgpu_alloc_resource(vgpu, param); 237 if (ret) 238 goto out_clean_vgpu_mmio; 239 240 populate_pvinfo_page(vgpu); 241 242 ret = intel_gvt_hypervisor_attach_vgpu(vgpu); 243 if (ret) 244 goto out_clean_vgpu_resource; 245 246 ret = intel_vgpu_init_gtt(vgpu); 247 if (ret) 248 goto out_detach_hypervisor_vgpu; 249 250 ret = intel_vgpu_init_display(vgpu); 251 if (ret) 252 goto out_clean_gtt; 253 254 ret = intel_vgpu_init_execlist(vgpu); 255 if (ret) 256 goto out_clean_display; 257 258 ret = intel_vgpu_init_gvt_context(vgpu); 259 if (ret) 260 goto out_clean_execlist; 261 262 ret = intel_vgpu_init_sched_policy(vgpu); 263 if (ret) 264 goto out_clean_shadow_ctx; 265 266 vgpu->active = true; 267 mutex_unlock(&gvt->lock); 268 269 return vgpu; 270 271 out_clean_shadow_ctx: 272 intel_vgpu_clean_gvt_context(vgpu); 273 out_clean_execlist: 274 intel_vgpu_clean_execlist(vgpu); 275 out_clean_display: 276 intel_vgpu_clean_display(vgpu); 277 out_clean_gtt: 278 intel_vgpu_clean_gtt(vgpu); 279 out_detach_hypervisor_vgpu: 280 intel_gvt_hypervisor_detach_vgpu(vgpu); 281 out_clean_vgpu_resource: 282 intel_vgpu_free_resource(vgpu); 283 out_clean_vgpu_mmio: 284 intel_vgpu_clean_mmio(vgpu); 285 out_clean_idr: 286 idr_remove(&gvt->vgpu_idr, vgpu->id); 287 out_free_vgpu: 288 vfree(vgpu); 289 mutex_unlock(&gvt->lock); 290 return ERR_PTR(ret); 291 } 292 293 /** 294 * intel_gvt_create_vgpu - create a virtual GPU 295 * @gvt: GVT device 296 * @type: type of the vGPU to create 297 * 298 * This function is called when user wants to create a virtual GPU. 299 * 300 * Returns: 301 * pointer to intel_vgpu, error pointer if failed. 302 */ 303 struct intel_vgpu *intel_gvt_create_vgpu(struct intel_gvt *gvt, 304 struct intel_vgpu_type *type) 305 { 306 struct intel_vgpu_creation_params param; 307 struct intel_vgpu *vgpu; 308 309 param.handle = 0; 310 param.primary = 1; 311 param.low_gm_sz = type->low_gm_size; 312 param.high_gm_sz = type->high_gm_size; 313 param.fence_sz = type->fence; 314 315 /* XXX current param based on MB */ 316 param.low_gm_sz = BYTES_TO_MB(param.low_gm_sz); 317 param.high_gm_sz = BYTES_TO_MB(param.high_gm_sz); 318 319 vgpu = __intel_gvt_create_vgpu(gvt, ¶m); 320 if (IS_ERR(vgpu)) 321 return vgpu; 322 323 /* calculate left instance change for types */ 324 intel_gvt_update_vgpu_types(gvt); 325 326 return vgpu; 327 } 328 329 /** 330 * intel_gvt_reset_vgpu_locked - reset a virtual GPU by DMLR or GT reset 331 * @vgpu: virtual GPU 332 * @dmlr: vGPU Device Model Level Reset or GT Reset 333 * @engine_mask: engines to reset for GT reset 334 * 335 * This function is called when user wants to reset a virtual GPU through 336 * device model reset or GT reset. The caller should hold the gvt lock. 337 * 338 * vGPU Device Model Level Reset (DMLR) simulates the PCI level reset to reset 339 * the whole vGPU to default state as when it is created. This vGPU function 340 * is required both for functionary and security concerns.The ultimate goal 341 * of vGPU FLR is that reuse a vGPU instance by virtual machines. When we 342 * assign a vGPU to a virtual machine we must isse such reset first. 343 * 344 * Full GT Reset and Per-Engine GT Reset are soft reset flow for GPU engines 345 * (Render, Blitter, Video, Video Enhancement). It is defined by GPU Spec. 346 * Unlike the FLR, GT reset only reset particular resource of a vGPU per 347 * the reset request. Guest driver can issue a GT reset by programming the 348 * virtual GDRST register to reset specific virtual GPU engine or all 349 * engines. 350 * 351 * The parameter dev_level is to identify if we will do DMLR or GT reset. 352 * The parameter engine_mask is to specific the engines that need to be 353 * resetted. If value ALL_ENGINES is given for engine_mask, it means 354 * the caller requests a full GT reset that we will reset all virtual 355 * GPU engines. For FLR, engine_mask is ignored. 356 */ 357 void intel_gvt_reset_vgpu_locked(struct intel_vgpu *vgpu, bool dmlr, 358 unsigned int engine_mask) 359 { 360 struct intel_gvt *gvt = vgpu->gvt; 361 struct intel_gvt_workload_scheduler *scheduler = &gvt->scheduler; 362 363 gvt_dbg_core("------------------------------------------\n"); 364 gvt_dbg_core("resseting vgpu%d, dmlr %d, engine_mask %08x\n", 365 vgpu->id, dmlr, engine_mask); 366 vgpu->resetting = true; 367 368 intel_vgpu_stop_schedule(vgpu); 369 /* 370 * The current_vgpu will set to NULL after stopping the 371 * scheduler when the reset is triggered by current vgpu. 372 */ 373 if (scheduler->current_vgpu == NULL) { 374 mutex_unlock(&gvt->lock); 375 intel_gvt_wait_vgpu_idle(vgpu); 376 mutex_lock(&gvt->lock); 377 } 378 379 intel_vgpu_reset_execlist(vgpu, dmlr ? ALL_ENGINES : engine_mask); 380 381 /* full GPU reset or device model level reset */ 382 if (engine_mask == ALL_ENGINES || dmlr) { 383 intel_vgpu_reset_gtt(vgpu, dmlr); 384 intel_vgpu_reset_resource(vgpu); 385 intel_vgpu_reset_mmio(vgpu); 386 populate_pvinfo_page(vgpu); 387 388 if (dmlr) 389 intel_vgpu_reset_cfg_space(vgpu); 390 } 391 392 vgpu->resetting = false; 393 gvt_dbg_core("reset vgpu%d done\n", vgpu->id); 394 gvt_dbg_core("------------------------------------------\n"); 395 } 396 397 /** 398 * intel_gvt_reset_vgpu - reset a virtual GPU (Function Level) 399 * @vgpu: virtual GPU 400 * 401 * This function is called when user wants to reset a virtual GPU. 402 * 403 */ 404 void intel_gvt_reset_vgpu(struct intel_vgpu *vgpu) 405 { 406 mutex_lock(&vgpu->gvt->lock); 407 intel_gvt_reset_vgpu_locked(vgpu, true, 0); 408 mutex_unlock(&vgpu->gvt->lock); 409 } 410