2 * Copyright(c) 2011-2016 Intel Corporation. All rights reserved.
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:
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
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
24 * Eddie Dong <eddie.dong@intel.com>
25 * Kevin Tian <kevin.tian@intel.com>
28 * Ping Gao <ping.a.gao@intel.com>
29 * Zhi Wang <zhi.a.wang@intel.com>
30 * Bing Niu <bing.niu@intel.com>
36 #include "i915_pvinfo.h"
38 void populate_pvinfo_page(struct intel_vgpu *vgpu)
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;
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;
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)) =
59 vgpu_vreg_t(vgpu, vgtif_reg(avail_rs.fence_num)) = vgpu_fence_sz(vgpu);
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));
68 WARN_ON(sizeof(struct vgt_if) != VGT_PVINFO_SIZE);
71 #define VGPU_MAX_WEIGHT 16
72 #define VGPU_WEIGHT(vgpu_num) \
73 (VGPU_MAX_WEIGHT / (vgpu_num))
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.
85 enum intel_vgpu_edid edid;
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" },
96 * intel_gvt_init_vgpu_types - initialize vGPU type list
99 * Initialize vGPU type list based on available resource.
102 int intel_gvt_init_vgpu_types(struct intel_gvt *gvt)
104 unsigned int num_types;
105 unsigned int i, low_avail, high_avail;
106 unsigned int min_low;
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
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
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]);
124 gvt->types = kcalloc(num_types, sizeof(struct intel_vgpu_type),
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)
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;
138 if (vgpu_types[i].weight < 1 ||
139 vgpu_types[i].weight > VGPU_MAX_WEIGHT)
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);
147 if (IS_GEN8(gvt->dev_priv))
148 sprintf(gvt->types[i].name, "GVTg_V4_%s",
150 else if (IS_GEN9(gvt->dev_priv))
151 sprintf(gvt->types[i].name, "GVTg_V5_%s",
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));
167 void intel_gvt_clean_vgpu_types(struct intel_gvt *gvt)
172 static void intel_gvt_update_vgpu_types(struct intel_gvt *gvt)
175 unsigned int low_gm_avail, high_gm_avail, fence_avail;
176 unsigned int low_gm_min, high_gm_min, fence_min;
178 /* Need to depend on maxium hw resource size but keep on
179 * static config for now.
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;
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),
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);
203 * intel_gvt_active_vgpu - activate a virtual GPU
206 * This function is called when user wants to activate a virtual GPU.
209 void intel_gvt_activate_vgpu(struct intel_vgpu *vgpu)
211 mutex_lock(&vgpu->gvt->lock);
213 mutex_unlock(&vgpu->gvt->lock);
217 * intel_gvt_deactive_vgpu - deactivate a virtual GPU
220 * This function is called when user wants to deactivate a virtual GPU.
221 * All virtual GPU runtime information will be destroyed.
224 void intel_gvt_deactivate_vgpu(struct intel_vgpu *vgpu)
226 struct intel_gvt *gvt = vgpu->gvt;
228 mutex_lock(&gvt->lock);
230 vgpu->active = false;
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);
238 intel_vgpu_stop_schedule(vgpu);
239 intel_vgpu_dmabuf_cleanup(vgpu);
241 mutex_unlock(&gvt->lock);
245 * intel_gvt_destroy_vgpu - destroy a virtual GPU
248 * This function is called when user wants to destroy a virtual GPU.
251 void intel_gvt_destroy_vgpu(struct intel_vgpu *vgpu)
253 struct intel_gvt *gvt = vgpu->gvt;
255 mutex_lock(&gvt->lock);
257 WARN(vgpu->active, "vGPU is still active!\n");
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);
274 intel_gvt_update_vgpu_types(gvt);
275 mutex_unlock(&gvt->lock);
278 #define IDLE_VGPU_IDR 0
281 * intel_gvt_create_idle_vgpu - create an idle virtual GPU
284 * This function is called when user wants to create an idle virtual GPU.
287 * pointer to intel_vgpu, error pointer if failed.
289 struct intel_vgpu *intel_gvt_create_idle_vgpu(struct intel_gvt *gvt)
291 struct intel_vgpu *vgpu;
292 enum intel_engine_id i;
295 vgpu = vzalloc(sizeof(*vgpu));
297 return ERR_PTR(-ENOMEM);
299 vgpu->id = IDLE_VGPU_IDR;
302 for (i = 0; i < I915_NUM_ENGINES; i++)
303 INIT_LIST_HEAD(&vgpu->submission.workload_q_head[i]);
305 ret = intel_vgpu_init_sched_policy(vgpu);
309 vgpu->active = false;
319 * intel_gvt_destroy_vgpu - destroy an idle virtual GPU
322 * This function is called when user wants to destroy an idle virtual GPU.
325 void intel_gvt_destroy_idle_vgpu(struct intel_vgpu *vgpu)
327 intel_vgpu_clean_sched_policy(vgpu);
331 static struct intel_vgpu *__intel_gvt_create_vgpu(struct intel_gvt *gvt,
332 struct intel_vgpu_creation_params *param)
334 struct intel_vgpu *vgpu;
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,
341 vgpu = vzalloc(sizeof(*vgpu));
343 return ERR_PTR(-ENOMEM);
345 mutex_lock(&gvt->lock);
347 ret = idr_alloc(&gvt->vgpu_idr, vgpu, IDLE_VGPU_IDR + 1, GVT_MAX_VGPU,
353 vgpu->handle = param->handle;
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);
361 ret = intel_vgpu_init_mmio(vgpu);
365 ret = intel_vgpu_alloc_resource(vgpu, param);
367 goto out_clean_vgpu_mmio;
369 populate_pvinfo_page(vgpu);
371 ret = intel_gvt_hypervisor_attach_vgpu(vgpu);
373 goto out_clean_vgpu_resource;
375 ret = intel_vgpu_init_gtt(vgpu);
377 goto out_detach_hypervisor_vgpu;
379 ret = intel_vgpu_init_opregion(vgpu);
383 ret = intel_vgpu_init_display(vgpu, param->resolution);
385 goto out_clean_opregion;
387 ret = intel_vgpu_setup_submission(vgpu);
389 goto out_clean_display;
391 ret = intel_vgpu_init_sched_policy(vgpu);
393 goto out_clean_submission;
395 ret = intel_gvt_debugfs_add_vgpu(vgpu);
397 goto out_clean_sched_policy;
399 ret = intel_gvt_hypervisor_set_opregion(vgpu);
401 goto out_clean_sched_policy;
403 mutex_unlock(&gvt->lock);
407 out_clean_sched_policy:
408 intel_vgpu_clean_sched_policy(vgpu);
409 out_clean_submission:
410 intel_vgpu_clean_submission(vgpu);
412 intel_vgpu_clean_display(vgpu);
414 intel_vgpu_clean_opregion(vgpu);
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);
422 intel_vgpu_clean_mmio(vgpu);
424 idr_remove(&gvt->vgpu_idr, vgpu->id);
427 mutex_unlock(&gvt->lock);
432 * intel_gvt_create_vgpu - create a virtual GPU
434 * @type: type of the vGPU to create
436 * This function is called when user wants to create a virtual GPU.
439 * pointer to intel_vgpu, error pointer if failed.
441 struct intel_vgpu *intel_gvt_create_vgpu(struct intel_gvt *gvt,
442 struct intel_vgpu_type *type)
444 struct intel_vgpu_creation_params param;
445 struct intel_vgpu *vgpu;
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;
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);
459 vgpu = __intel_gvt_create_vgpu(gvt, ¶m);
463 /* calculate left instance change for types */
464 intel_gvt_update_vgpu_types(gvt);
470 * intel_gvt_reset_vgpu_locked - reset a virtual GPU by DMLR or GT reset
472 * @dmlr: vGPU Device Model Level Reset or GT Reset
473 * @engine_mask: engines to reset for GT reset
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.
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.
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
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.
497 void intel_gvt_reset_vgpu_locked(struct intel_vgpu *vgpu, bool dmlr,
498 unsigned int engine_mask)
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;
504 gvt_dbg_core("------------------------------------------\n");
505 gvt_dbg_core("resseting vgpu%d, dmlr %d, engine_mask %08x\n",
506 vgpu->id, dmlr, engine_mask);
508 vgpu->resetting_eng = resetting_eng;
510 intel_vgpu_stop_schedule(vgpu);
512 * The current_vgpu will set to NULL after stopping the
513 * scheduler when the reset is triggered by current vgpu.
515 if (scheduler->current_vgpu == NULL) {
516 mutex_unlock(&gvt->lock);
517 intel_gvt_wait_vgpu_idle(vgpu);
518 mutex_lock(&gvt->lock);
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 */
528 intel_vgpu_reset_gtt(vgpu);
529 intel_vgpu_reset_resource(vgpu);
532 intel_vgpu_reset_mmio(vgpu, dmlr);
533 populate_pvinfo_page(vgpu);
534 intel_vgpu_reset_display(vgpu);
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;
544 vgpu->resetting_eng = 0;
545 gvt_dbg_core("reset vgpu%d done\n", vgpu->id);
546 gvt_dbg_core("------------------------------------------\n");
550 * intel_gvt_reset_vgpu - reset a virtual GPU (Function Level)
553 * This function is called when user wants to reset a virtual GPU.
556 void intel_gvt_reset_vgpu(struct intel_vgpu *vgpu)
558 mutex_lock(&vgpu->gvt->lock);
559 intel_gvt_reset_vgpu_locked(vgpu, true, 0);
560 mutex_unlock(&vgpu->gvt->lock);