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_t(vgpu, vgtif_reg(magic)) = VGT_MAGIC; 42 vgpu_vreg_t(vgpu, vgtif_reg(version_major)) = 1; 43 vgpu_vreg_t(vgpu, vgtif_reg(version_minor)) = 0; 44 vgpu_vreg_t(vgpu, vgtif_reg(display_ready)) = 0; 45 vgpu_vreg_t(vgpu, vgtif_reg(vgt_id)) = vgpu->id; 46 47 vgpu_vreg_t(vgpu, vgtif_reg(vgt_caps)) = VGT_CAPS_FULL_48BIT_PPGTT; 48 vgpu_vreg_t(vgpu, vgtif_reg(vgt_caps)) |= VGT_CAPS_HWSP_EMULATION; 49 50 vgpu_vreg_t(vgpu, vgtif_reg(avail_rs.mappable_gmadr.base)) = 51 vgpu_aperture_gmadr_base(vgpu); 52 vgpu_vreg_t(vgpu, vgtif_reg(avail_rs.mappable_gmadr.size)) = 53 vgpu_aperture_sz(vgpu); 54 vgpu_vreg_t(vgpu, vgtif_reg(avail_rs.nonmappable_gmadr.base)) = 55 vgpu_hidden_gmadr_base(vgpu); 56 vgpu_vreg_t(vgpu, vgtif_reg(avail_rs.nonmappable_gmadr.size)) = 57 vgpu_hidden_sz(vgpu); 58 59 vgpu_vreg_t(vgpu, vgtif_reg(avail_rs.fence_num)) = vgpu_fence_sz(vgpu); 60 61 gvt_dbg_core("Populate PVINFO PAGE for vGPU %d\n", vgpu->id); 62 gvt_dbg_core("aperture base [GMADR] 0x%llx size 0x%llx\n", 63 vgpu_aperture_gmadr_base(vgpu), vgpu_aperture_sz(vgpu)); 64 gvt_dbg_core("hidden base [GMADR] 0x%llx size=0x%llx\n", 65 vgpu_hidden_gmadr_base(vgpu), vgpu_hidden_sz(vgpu)); 66 gvt_dbg_core("fence size %d\n", vgpu_fence_sz(vgpu)); 67 68 WARN_ON(sizeof(struct vgt_if) != VGT_PVINFO_SIZE); 69 } 70 71 #define VGPU_MAX_WEIGHT 16 72 #define VGPU_WEIGHT(vgpu_num) \ 73 (VGPU_MAX_WEIGHT / (vgpu_num)) 74 75 static struct { 76 unsigned int low_mm; 77 unsigned int high_mm; 78 unsigned int fence; 79 80 /* A vGPU with a weight of 8 will get twice as much GPU as a vGPU 81 * with a weight of 4 on a contended host, different vGPU type has 82 * different weight set. Legal weights range from 1 to 16. 83 */ 84 unsigned int weight; 85 enum intel_vgpu_edid edid; 86 char *name; 87 } vgpu_types[] = { 88 /* Fixed vGPU type table */ 89 { MB_TO_BYTES(64), MB_TO_BYTES(384), 4, VGPU_WEIGHT(8), GVT_EDID_1024_768, "8" }, 90 { MB_TO_BYTES(128), MB_TO_BYTES(512), 4, VGPU_WEIGHT(4), GVT_EDID_1920_1200, "4" }, 91 { MB_TO_BYTES(256), MB_TO_BYTES(1024), 4, VGPU_WEIGHT(2), GVT_EDID_1920_1200, "2" }, 92 { MB_TO_BYTES(512), MB_TO_BYTES(2048), 4, VGPU_WEIGHT(1), GVT_EDID_1920_1200, "1" }, 93 }; 94 95 /** 96 * intel_gvt_init_vgpu_types - initialize vGPU type list 97 * @gvt : GVT device 98 * 99 * Initialize vGPU type list based on available resource. 100 * 101 */ 102 int intel_gvt_init_vgpu_types(struct intel_gvt *gvt) 103 { 104 unsigned int num_types; 105 unsigned int i, low_avail, high_avail; 106 unsigned int min_low; 107 108 /* vGPU type name is defined as GVTg_Vx_y which contains 109 * physical GPU generation type (e.g V4 as BDW server, V5 as 110 * SKL server). 111 * 112 * Depend on physical SKU resource, might see vGPU types like 113 * GVTg_V4_8, GVTg_V4_4, GVTg_V4_2, etc. We can create 114 * different types of vGPU on same physical GPU depending on 115 * available resource. Each vGPU type will have "avail_instance" 116 * to indicate how many vGPU instance can be created for this 117 * type. 118 * 119 */ 120 low_avail = gvt_aperture_sz(gvt) - HOST_LOW_GM_SIZE; 121 high_avail = gvt_hidden_sz(gvt) - HOST_HIGH_GM_SIZE; 122 num_types = sizeof(vgpu_types) / sizeof(vgpu_types[0]); 123 124 gvt->types = kcalloc(num_types, sizeof(struct intel_vgpu_type), 125 GFP_KERNEL); 126 if (!gvt->types) 127 return -ENOMEM; 128 129 min_low = MB_TO_BYTES(32); 130 for (i = 0; i < num_types; ++i) { 131 if (low_avail / vgpu_types[i].low_mm == 0) 132 break; 133 134 gvt->types[i].low_gm_size = vgpu_types[i].low_mm; 135 gvt->types[i].high_gm_size = vgpu_types[i].high_mm; 136 gvt->types[i].fence = vgpu_types[i].fence; 137 138 if (vgpu_types[i].weight < 1 || 139 vgpu_types[i].weight > VGPU_MAX_WEIGHT) 140 return -EINVAL; 141 142 gvt->types[i].weight = vgpu_types[i].weight; 143 gvt->types[i].resolution = vgpu_types[i].edid; 144 gvt->types[i].avail_instance = min(low_avail / vgpu_types[i].low_mm, 145 high_avail / vgpu_types[i].high_mm); 146 147 if (IS_GEN8(gvt->dev_priv)) 148 sprintf(gvt->types[i].name, "GVTg_V4_%s", 149 vgpu_types[i].name); 150 else if (IS_GEN9(gvt->dev_priv)) 151 sprintf(gvt->types[i].name, "GVTg_V5_%s", 152 vgpu_types[i].name); 153 154 gvt_dbg_core("type[%d]: %s avail %u low %u high %u fence %u weight %u res %s\n", 155 i, gvt->types[i].name, 156 gvt->types[i].avail_instance, 157 gvt->types[i].low_gm_size, 158 gvt->types[i].high_gm_size, gvt->types[i].fence, 159 gvt->types[i].weight, 160 vgpu_edid_str(gvt->types[i].resolution)); 161 } 162 163 gvt->num_types = i; 164 return 0; 165 } 166 167 void intel_gvt_clean_vgpu_types(struct intel_gvt *gvt) 168 { 169 kfree(gvt->types); 170 } 171 172 static void intel_gvt_update_vgpu_types(struct intel_gvt *gvt) 173 { 174 int i; 175 unsigned int low_gm_avail, high_gm_avail, fence_avail; 176 unsigned int low_gm_min, high_gm_min, fence_min; 177 178 /* Need to depend on maxium hw resource size but keep on 179 * static config for now. 180 */ 181 low_gm_avail = gvt_aperture_sz(gvt) - HOST_LOW_GM_SIZE - 182 gvt->gm.vgpu_allocated_low_gm_size; 183 high_gm_avail = gvt_hidden_sz(gvt) - HOST_HIGH_GM_SIZE - 184 gvt->gm.vgpu_allocated_high_gm_size; 185 fence_avail = gvt_fence_sz(gvt) - HOST_FENCE - 186 gvt->fence.vgpu_allocated_fence_num; 187 188 for (i = 0; i < gvt->num_types; i++) { 189 low_gm_min = low_gm_avail / gvt->types[i].low_gm_size; 190 high_gm_min = high_gm_avail / gvt->types[i].high_gm_size; 191 fence_min = fence_avail / gvt->types[i].fence; 192 gvt->types[i].avail_instance = min(min(low_gm_min, high_gm_min), 193 fence_min); 194 195 gvt_dbg_core("update type[%d]: %s avail %u low %u high %u fence %u\n", 196 i, gvt->types[i].name, 197 gvt->types[i].avail_instance, gvt->types[i].low_gm_size, 198 gvt->types[i].high_gm_size, gvt->types[i].fence); 199 } 200 } 201 202 /** 203 * intel_gvt_active_vgpu - activate a virtual GPU 204 * @vgpu: virtual GPU 205 * 206 * This function is called when user wants to activate a virtual GPU. 207 * 208 */ 209 void intel_gvt_activate_vgpu(struct intel_vgpu *vgpu) 210 { 211 mutex_lock(&vgpu->gvt->lock); 212 vgpu->active = true; 213 mutex_unlock(&vgpu->gvt->lock); 214 } 215 216 /** 217 * intel_gvt_deactive_vgpu - deactivate a virtual GPU 218 * @vgpu: virtual GPU 219 * 220 * This function is called when user wants to deactivate a virtual GPU. 221 * All virtual GPU runtime information will be destroyed. 222 * 223 */ 224 void intel_gvt_deactivate_vgpu(struct intel_vgpu *vgpu) 225 { 226 struct intel_gvt *gvt = vgpu->gvt; 227 228 mutex_lock(&gvt->lock); 229 230 vgpu->active = false; 231 232 if (atomic_read(&vgpu->submission.running_workload_num)) { 233 mutex_unlock(&gvt->lock); 234 intel_gvt_wait_vgpu_idle(vgpu); 235 mutex_lock(&gvt->lock); 236 } 237 238 intel_vgpu_stop_schedule(vgpu); 239 intel_vgpu_dmabuf_cleanup(vgpu); 240 241 mutex_unlock(&gvt->lock); 242 } 243 244 /** 245 * intel_gvt_destroy_vgpu - destroy a virtual GPU 246 * @vgpu: virtual GPU 247 * 248 * This function is called when user wants to destroy a virtual GPU. 249 * 250 */ 251 void intel_gvt_destroy_vgpu(struct intel_vgpu *vgpu) 252 { 253 struct intel_gvt *gvt = vgpu->gvt; 254 255 mutex_lock(&gvt->lock); 256 257 WARN(vgpu->active, "vGPU is still active!\n"); 258 259 intel_gvt_debugfs_remove_vgpu(vgpu); 260 idr_remove(&gvt->vgpu_idr, vgpu->id); 261 if (idr_is_empty(&gvt->vgpu_idr)) 262 intel_gvt_clean_irq(gvt); 263 intel_vgpu_clean_sched_policy(vgpu); 264 intel_vgpu_clean_submission(vgpu); 265 intel_vgpu_clean_display(vgpu); 266 intel_vgpu_clean_opregion(vgpu); 267 intel_vgpu_clean_gtt(vgpu); 268 intel_gvt_hypervisor_detach_vgpu(vgpu); 269 intel_vgpu_free_resource(vgpu); 270 intel_vgpu_clean_mmio(vgpu); 271 intel_vgpu_dmabuf_cleanup(vgpu); 272 vfree(vgpu); 273 274 intel_gvt_update_vgpu_types(gvt); 275 mutex_unlock(&gvt->lock); 276 } 277 278 #define IDLE_VGPU_IDR 0 279 280 /** 281 * intel_gvt_create_idle_vgpu - create an idle virtual GPU 282 * @gvt: GVT device 283 * 284 * This function is called when user wants to create an idle virtual GPU. 285 * 286 * Returns: 287 * pointer to intel_vgpu, error pointer if failed. 288 */ 289 struct intel_vgpu *intel_gvt_create_idle_vgpu(struct intel_gvt *gvt) 290 { 291 struct intel_vgpu *vgpu; 292 enum intel_engine_id i; 293 int ret; 294 295 vgpu = vzalloc(sizeof(*vgpu)); 296 if (!vgpu) 297 return ERR_PTR(-ENOMEM); 298 299 vgpu->id = IDLE_VGPU_IDR; 300 vgpu->gvt = gvt; 301 302 for (i = 0; i < I915_NUM_ENGINES; i++) 303 INIT_LIST_HEAD(&vgpu->submission.workload_q_head[i]); 304 305 ret = intel_vgpu_init_sched_policy(vgpu); 306 if (ret) 307 goto out_free_vgpu; 308 309 vgpu->active = false; 310 311 return vgpu; 312 313 out_free_vgpu: 314 vfree(vgpu); 315 return ERR_PTR(ret); 316 } 317 318 /** 319 * intel_gvt_destroy_vgpu - destroy an idle virtual GPU 320 * @vgpu: virtual GPU 321 * 322 * This function is called when user wants to destroy an idle virtual GPU. 323 * 324 */ 325 void intel_gvt_destroy_idle_vgpu(struct intel_vgpu *vgpu) 326 { 327 intel_vgpu_clean_sched_policy(vgpu); 328 vfree(vgpu); 329 } 330 331 static struct intel_vgpu *__intel_gvt_create_vgpu(struct intel_gvt *gvt, 332 struct intel_vgpu_creation_params *param) 333 { 334 struct intel_vgpu *vgpu; 335 int ret; 336 337 gvt_dbg_core("handle %llu low %llu MB high %llu MB fence %llu\n", 338 param->handle, param->low_gm_sz, param->high_gm_sz, 339 param->fence_sz); 340 341 vgpu = vzalloc(sizeof(*vgpu)); 342 if (!vgpu) 343 return ERR_PTR(-ENOMEM); 344 345 mutex_lock(&gvt->lock); 346 347 ret = idr_alloc(&gvt->vgpu_idr, vgpu, IDLE_VGPU_IDR + 1, GVT_MAX_VGPU, 348 GFP_KERNEL); 349 if (ret < 0) 350 goto out_free_vgpu; 351 352 vgpu->id = ret; 353 vgpu->handle = param->handle; 354 vgpu->gvt = gvt; 355 vgpu->sched_ctl.weight = param->weight; 356 INIT_LIST_HEAD(&vgpu->dmabuf_obj_list_head); 357 INIT_RADIX_TREE(&vgpu->page_track_tree, GFP_KERNEL); 358 idr_init(&vgpu->object_idr); 359 intel_vgpu_init_cfg_space(vgpu, param->primary); 360 361 ret = intel_vgpu_init_mmio(vgpu); 362 if (ret) 363 goto out_clean_idr; 364 365 ret = intel_vgpu_alloc_resource(vgpu, param); 366 if (ret) 367 goto out_clean_vgpu_mmio; 368 369 populate_pvinfo_page(vgpu); 370 371 ret = intel_gvt_hypervisor_attach_vgpu(vgpu); 372 if (ret) 373 goto out_clean_vgpu_resource; 374 375 ret = intel_vgpu_init_gtt(vgpu); 376 if (ret) 377 goto out_detach_hypervisor_vgpu; 378 379 ret = intel_vgpu_init_opregion(vgpu); 380 if (ret) 381 goto out_clean_gtt; 382 383 ret = intel_vgpu_init_display(vgpu, param->resolution); 384 if (ret) 385 goto out_clean_opregion; 386 387 ret = intel_vgpu_setup_submission(vgpu); 388 if (ret) 389 goto out_clean_display; 390 391 ret = intel_vgpu_init_sched_policy(vgpu); 392 if (ret) 393 goto out_clean_submission; 394 395 ret = intel_gvt_debugfs_add_vgpu(vgpu); 396 if (ret) 397 goto out_clean_sched_policy; 398 399 ret = intel_gvt_hypervisor_set_opregion(vgpu); 400 if (ret) 401 goto out_clean_sched_policy; 402 403 mutex_unlock(&gvt->lock); 404 405 return vgpu; 406 407 out_clean_sched_policy: 408 intel_vgpu_clean_sched_policy(vgpu); 409 out_clean_submission: 410 intel_vgpu_clean_submission(vgpu); 411 out_clean_display: 412 intel_vgpu_clean_display(vgpu); 413 out_clean_opregion: 414 intel_vgpu_clean_opregion(vgpu); 415 out_clean_gtt: 416 intel_vgpu_clean_gtt(vgpu); 417 out_detach_hypervisor_vgpu: 418 intel_gvt_hypervisor_detach_vgpu(vgpu); 419 out_clean_vgpu_resource: 420 intel_vgpu_free_resource(vgpu); 421 out_clean_vgpu_mmio: 422 intel_vgpu_clean_mmio(vgpu); 423 out_clean_idr: 424 idr_remove(&gvt->vgpu_idr, vgpu->id); 425 out_free_vgpu: 426 vfree(vgpu); 427 mutex_unlock(&gvt->lock); 428 return ERR_PTR(ret); 429 } 430 431 /** 432 * intel_gvt_create_vgpu - create a virtual GPU 433 * @gvt: GVT device 434 * @type: type of the vGPU to create 435 * 436 * This function is called when user wants to create a virtual GPU. 437 * 438 * Returns: 439 * pointer to intel_vgpu, error pointer if failed. 440 */ 441 struct intel_vgpu *intel_gvt_create_vgpu(struct intel_gvt *gvt, 442 struct intel_vgpu_type *type) 443 { 444 struct intel_vgpu_creation_params param; 445 struct intel_vgpu *vgpu; 446 447 param.handle = 0; 448 param.primary = 1; 449 param.low_gm_sz = type->low_gm_size; 450 param.high_gm_sz = type->high_gm_size; 451 param.fence_sz = type->fence; 452 param.weight = type->weight; 453 param.resolution = type->resolution; 454 455 /* XXX current param based on MB */ 456 param.low_gm_sz = BYTES_TO_MB(param.low_gm_sz); 457 param.high_gm_sz = BYTES_TO_MB(param.high_gm_sz); 458 459 vgpu = __intel_gvt_create_vgpu(gvt, ¶m); 460 if (IS_ERR(vgpu)) 461 return vgpu; 462 463 /* calculate left instance change for types */ 464 intel_gvt_update_vgpu_types(gvt); 465 466 return vgpu; 467 } 468 469 /** 470 * intel_gvt_reset_vgpu_locked - reset a virtual GPU by DMLR or GT reset 471 * @vgpu: virtual GPU 472 * @dmlr: vGPU Device Model Level Reset or GT Reset 473 * @engine_mask: engines to reset for GT reset 474 * 475 * This function is called when user wants to reset a virtual GPU through 476 * device model reset or GT reset. The caller should hold the gvt lock. 477 * 478 * vGPU Device Model Level Reset (DMLR) simulates the PCI level reset to reset 479 * the whole vGPU to default state as when it is created. This vGPU function 480 * is required both for functionary and security concerns.The ultimate goal 481 * of vGPU FLR is that reuse a vGPU instance by virtual machines. When we 482 * assign a vGPU to a virtual machine we must isse such reset first. 483 * 484 * Full GT Reset and Per-Engine GT Reset are soft reset flow for GPU engines 485 * (Render, Blitter, Video, Video Enhancement). It is defined by GPU Spec. 486 * Unlike the FLR, GT reset only reset particular resource of a vGPU per 487 * the reset request. Guest driver can issue a GT reset by programming the 488 * virtual GDRST register to reset specific virtual GPU engine or all 489 * engines. 490 * 491 * The parameter dev_level is to identify if we will do DMLR or GT reset. 492 * The parameter engine_mask is to specific the engines that need to be 493 * resetted. If value ALL_ENGINES is given for engine_mask, it means 494 * the caller requests a full GT reset that we will reset all virtual 495 * GPU engines. For FLR, engine_mask is ignored. 496 */ 497 void intel_gvt_reset_vgpu_locked(struct intel_vgpu *vgpu, bool dmlr, 498 unsigned int engine_mask) 499 { 500 struct intel_gvt *gvt = vgpu->gvt; 501 struct intel_gvt_workload_scheduler *scheduler = &gvt->scheduler; 502 unsigned int resetting_eng = dmlr ? ALL_ENGINES : engine_mask; 503 504 gvt_dbg_core("------------------------------------------\n"); 505 gvt_dbg_core("resseting vgpu%d, dmlr %d, engine_mask %08x\n", 506 vgpu->id, dmlr, engine_mask); 507 508 vgpu->resetting_eng = resetting_eng; 509 510 intel_vgpu_stop_schedule(vgpu); 511 /* 512 * The current_vgpu will set to NULL after stopping the 513 * scheduler when the reset is triggered by current vgpu. 514 */ 515 if (scheduler->current_vgpu == NULL) { 516 mutex_unlock(&gvt->lock); 517 intel_gvt_wait_vgpu_idle(vgpu); 518 mutex_lock(&gvt->lock); 519 } 520 521 intel_vgpu_reset_submission(vgpu, resetting_eng); 522 /* full GPU reset or device model level reset */ 523 if (engine_mask == ALL_ENGINES || dmlr) { 524 intel_vgpu_select_submission_ops(vgpu, ALL_ENGINES, 0); 525 intel_vgpu_invalidate_ppgtt(vgpu); 526 /*fence will not be reset during virtual reset */ 527 if (dmlr) { 528 intel_vgpu_reset_gtt(vgpu); 529 intel_vgpu_reset_resource(vgpu); 530 } 531 532 intel_vgpu_reset_mmio(vgpu, dmlr); 533 populate_pvinfo_page(vgpu); 534 intel_vgpu_reset_display(vgpu); 535 536 if (dmlr) { 537 intel_vgpu_reset_cfg_space(vgpu); 538 /* only reset the failsafe mode when dmlr reset */ 539 vgpu->failsafe = false; 540 vgpu->pv_notified = false; 541 } 542 } 543 544 vgpu->resetting_eng = 0; 545 gvt_dbg_core("reset vgpu%d done\n", vgpu->id); 546 gvt_dbg_core("------------------------------------------\n"); 547 } 548 549 /** 550 * intel_gvt_reset_vgpu - reset a virtual GPU (Function Level) 551 * @vgpu: virtual GPU 552 * 553 * This function is called when user wants to reset a virtual GPU. 554 * 555 */ 556 void intel_gvt_reset_vgpu(struct intel_vgpu *vgpu) 557 { 558 mutex_lock(&vgpu->gvt->lock); 559 intel_gvt_reset_vgpu_locked(vgpu, true, 0); 560 mutex_unlock(&vgpu->gvt->lock); 561 } 562