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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
38void 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_PPGTT;
48 vgpu_vreg_t(vgpu, vgtif_reg(vgt_caps)) |= VGT_CAPS_HWSP_EMULATION;
49 vgpu_vreg_t(vgpu, vgtif_reg(vgt_caps)) |= VGT_CAPS_HUGE_GTT;
50
51 vgpu_vreg_t(vgpu, vgtif_reg(avail_rs.mappable_gmadr.base)) =
52 vgpu_aperture_gmadr_base(vgpu);
53 vgpu_vreg_t(vgpu, vgtif_reg(avail_rs.mappable_gmadr.size)) =
54 vgpu_aperture_sz(vgpu);
55 vgpu_vreg_t(vgpu, vgtif_reg(avail_rs.nonmappable_gmadr.base)) =
56 vgpu_hidden_gmadr_base(vgpu);
57 vgpu_vreg_t(vgpu, vgtif_reg(avail_rs.nonmappable_gmadr.size)) =
58 vgpu_hidden_sz(vgpu);
59
60 vgpu_vreg_t(vgpu, vgtif_reg(avail_rs.fence_num)) = vgpu_fence_sz(vgpu);
61
62 vgpu_vreg_t(vgpu, vgtif_reg(cursor_x_hot)) = UINT_MAX;
63 vgpu_vreg_t(vgpu, vgtif_reg(cursor_y_hot)) = UINT_MAX;
64
65 gvt_dbg_core("Populate PVINFO PAGE for vGPU %d\n", vgpu->id);
66 gvt_dbg_core("aperture base [GMADR] 0x%llx size 0x%llx\n",
67 vgpu_aperture_gmadr_base(vgpu), vgpu_aperture_sz(vgpu));
68 gvt_dbg_core("hidden base [GMADR] 0x%llx size=0x%llx\n",
69 vgpu_hidden_gmadr_base(vgpu), vgpu_hidden_sz(vgpu));
70 gvt_dbg_core("fence size %d\n", vgpu_fence_sz(vgpu));
71
72 WARN_ON(sizeof(struct vgt_if) != VGT_PVINFO_SIZE);
73}
74
75#define VGPU_MAX_WEIGHT 16
76#define VGPU_WEIGHT(vgpu_num) \
77 (VGPU_MAX_WEIGHT / (vgpu_num))
78
79static struct {
80 unsigned int low_mm;
81 unsigned int high_mm;
82 unsigned int fence;
83
84 /* A vGPU with a weight of 8 will get twice as much GPU as a vGPU
85 * with a weight of 4 on a contended host, different vGPU type has
86 * different weight set. Legal weights range from 1 to 16.
87 */
88 unsigned int weight;
89 enum intel_vgpu_edid edid;
90 char *name;
91} vgpu_types[] = {
92/* Fixed vGPU type table */
93 { MB_TO_BYTES(64), MB_TO_BYTES(384), 4, VGPU_WEIGHT(8), GVT_EDID_1024_768, "8" },
94 { MB_TO_BYTES(128), MB_TO_BYTES(512), 4, VGPU_WEIGHT(4), GVT_EDID_1920_1200, "4" },
95 { MB_TO_BYTES(256), MB_TO_BYTES(1024), 4, VGPU_WEIGHT(2), GVT_EDID_1920_1200, "2" },
96 { MB_TO_BYTES(512), MB_TO_BYTES(2048), 4, VGPU_WEIGHT(1), GVT_EDID_1920_1200, "1" },
97};
98
99/**
100 * intel_gvt_init_vgpu_types - initialize vGPU type list
101 * @gvt : GVT device
102 *
103 * Initialize vGPU type list based on available resource.
104 *
105 */
106int intel_gvt_init_vgpu_types(struct intel_gvt *gvt)
107{
108 unsigned int num_types;
109 unsigned int i, low_avail, high_avail;
110 unsigned int min_low;
111
112 /* vGPU type name is defined as GVTg_Vx_y which contains
113 * physical GPU generation type (e.g V4 as BDW server, V5 as
114 * SKL server).
115 *
116 * Depend on physical SKU resource, might see vGPU types like
117 * GVTg_V4_8, GVTg_V4_4, GVTg_V4_2, etc. We can create
118 * different types of vGPU on same physical GPU depending on
119 * available resource. Each vGPU type will have "avail_instance"
120 * to indicate how many vGPU instance can be created for this
121 * type.
122 *
123 */
124 low_avail = gvt_aperture_sz(gvt) - HOST_LOW_GM_SIZE;
125 high_avail = gvt_hidden_sz(gvt) - HOST_HIGH_GM_SIZE;
126 num_types = sizeof(vgpu_types) / sizeof(vgpu_types[0]);
127
128 gvt->types = kcalloc(num_types, sizeof(struct intel_vgpu_type),
129 GFP_KERNEL);
130 if (!gvt->types)
131 return -ENOMEM;
132
133 min_low = MB_TO_BYTES(32);
134 for (i = 0; i < num_types; ++i) {
135 if (low_avail / vgpu_types[i].low_mm == 0)
136 break;
137
138 gvt->types[i].low_gm_size = vgpu_types[i].low_mm;
139 gvt->types[i].high_gm_size = vgpu_types[i].high_mm;
140 gvt->types[i].fence = vgpu_types[i].fence;
141
142 if (vgpu_types[i].weight < 1 ||
143 vgpu_types[i].weight > VGPU_MAX_WEIGHT)
144 return -EINVAL;
145
146 gvt->types[i].weight = vgpu_types[i].weight;
147 gvt->types[i].resolution = vgpu_types[i].edid;
148 gvt->types[i].avail_instance = min(low_avail / vgpu_types[i].low_mm,
149 high_avail / vgpu_types[i].high_mm);
150
151 if (IS_GEN(gvt->dev_priv, 8))
152 sprintf(gvt->types[i].name, "GVTg_V4_%s",
153 vgpu_types[i].name);
154 else if (IS_GEN(gvt->dev_priv, 9))
155 sprintf(gvt->types[i].name, "GVTg_V5_%s",
156 vgpu_types[i].name);
157
158 gvt_dbg_core("type[%d]: %s avail %u low %u high %u fence %u weight %u res %s\n",
159 i, gvt->types[i].name,
160 gvt->types[i].avail_instance,
161 gvt->types[i].low_gm_size,
162 gvt->types[i].high_gm_size, gvt->types[i].fence,
163 gvt->types[i].weight,
164 vgpu_edid_str(gvt->types[i].resolution));
165 }
166
167 gvt->num_types = i;
168 return 0;
169}
170
171void intel_gvt_clean_vgpu_types(struct intel_gvt *gvt)
172{
173 kfree(gvt->types);
174}
175
176static void intel_gvt_update_vgpu_types(struct intel_gvt *gvt)
177{
178 int i;
179 unsigned int low_gm_avail, high_gm_avail, fence_avail;
180 unsigned int low_gm_min, high_gm_min, fence_min;
181
182 /* Need to depend on maxium hw resource size but keep on
183 * static config for now.
184 */
185 low_gm_avail = gvt_aperture_sz(gvt) - HOST_LOW_GM_SIZE -
186 gvt->gm.vgpu_allocated_low_gm_size;
187 high_gm_avail = gvt_hidden_sz(gvt) - HOST_HIGH_GM_SIZE -
188 gvt->gm.vgpu_allocated_high_gm_size;
189 fence_avail = gvt_fence_sz(gvt) - HOST_FENCE -
190 gvt->fence.vgpu_allocated_fence_num;
191
192 for (i = 0; i < gvt->num_types; i++) {
193 low_gm_min = low_gm_avail / gvt->types[i].low_gm_size;
194 high_gm_min = high_gm_avail / gvt->types[i].high_gm_size;
195 fence_min = fence_avail / gvt->types[i].fence;
196 gvt->types[i].avail_instance = min(min(low_gm_min, high_gm_min),
197 fence_min);
198
199 gvt_dbg_core("update type[%d]: %s avail %u low %u high %u fence %u\n",
200 i, gvt->types[i].name,
201 gvt->types[i].avail_instance, gvt->types[i].low_gm_size,
202 gvt->types[i].high_gm_size, gvt->types[i].fence);
203 }
204}
205
206/**
207 * intel_gvt_active_vgpu - activate a virtual GPU
208 * @vgpu: virtual GPU
209 *
210 * This function is called when user wants to activate a virtual GPU.
211 *
212 */
213void intel_gvt_activate_vgpu(struct intel_vgpu *vgpu)
214{
215 mutex_lock(&vgpu->gvt->lock);
216 vgpu->active = true;
217 mutex_unlock(&vgpu->gvt->lock);
218}
219
220/**
221 * intel_gvt_deactive_vgpu - deactivate a virtual GPU
222 * @vgpu: virtual GPU
223 *
224 * This function is called when user wants to deactivate a virtual GPU.
225 * The virtual GPU will be stopped.
226 *
227 */
228void intel_gvt_deactivate_vgpu(struct intel_vgpu *vgpu)
229{
230 mutex_lock(&vgpu->vgpu_lock);
231
232 vgpu->active = false;
233
234 if (atomic_read(&vgpu->submission.running_workload_num)) {
235 mutex_unlock(&vgpu->vgpu_lock);
236 intel_gvt_wait_vgpu_idle(vgpu);
237 mutex_lock(&vgpu->vgpu_lock);
238 }
239
240 intel_vgpu_stop_schedule(vgpu);
241
242 mutex_unlock(&vgpu->vgpu_lock);
243}
244
245/**
246 * intel_gvt_release_vgpu - release a virtual GPU
247 * @vgpu: virtual GPU
248 *
249 * This function is called when user wants to release a virtual GPU.
250 * The virtual GPU will be stopped and all runtime information will be
251 * destroyed.
252 *
253 */
254void intel_gvt_release_vgpu(struct intel_vgpu *vgpu)
255{
256 intel_gvt_deactivate_vgpu(vgpu);
257
258 mutex_lock(&vgpu->vgpu_lock);
259 intel_vgpu_clean_workloads(vgpu, ALL_ENGINES);
260 intel_vgpu_dmabuf_cleanup(vgpu);
261 mutex_unlock(&vgpu->vgpu_lock);
262}
263
264/**
265 * intel_gvt_destroy_vgpu - destroy a virtual GPU
266 * @vgpu: virtual GPU
267 *
268 * This function is called when user wants to destroy a virtual GPU.
269 *
270 */
271void intel_gvt_destroy_vgpu(struct intel_vgpu *vgpu)
272{
273 struct intel_gvt *gvt = vgpu->gvt;
274
275 mutex_lock(&vgpu->vgpu_lock);
276
277 WARN(vgpu->active, "vGPU is still active!\n");
278
279 intel_gvt_debugfs_remove_vgpu(vgpu);
280 intel_vgpu_clean_sched_policy(vgpu);
281 intel_vgpu_clean_submission(vgpu);
282 intel_vgpu_clean_display(vgpu);
283 intel_vgpu_clean_opregion(vgpu);
284 intel_vgpu_reset_ggtt(vgpu, true);
285 intel_vgpu_clean_gtt(vgpu);
286 intel_gvt_hypervisor_detach_vgpu(vgpu);
287 intel_vgpu_free_resource(vgpu);
288 intel_vgpu_clean_mmio(vgpu);
289 intel_vgpu_dmabuf_cleanup(vgpu);
290 mutex_unlock(&vgpu->vgpu_lock);
291
292 mutex_lock(&gvt->lock);
293 idr_remove(&gvt->vgpu_idr, vgpu->id);
294 if (idr_is_empty(&gvt->vgpu_idr))
295 intel_gvt_clean_irq(gvt);
296 intel_gvt_update_vgpu_types(gvt);
297 mutex_unlock(&gvt->lock);
298
299 vfree(vgpu);
300}
301
302#define IDLE_VGPU_IDR 0
303
304/**
305 * intel_gvt_create_idle_vgpu - create an idle virtual GPU
306 * @gvt: GVT device
307 *
308 * This function is called when user wants to create an idle virtual GPU.
309 *
310 * Returns:
311 * pointer to intel_vgpu, error pointer if failed.
312 */
313struct intel_vgpu *intel_gvt_create_idle_vgpu(struct intel_gvt *gvt)
314{
315 struct intel_vgpu *vgpu;
316 enum intel_engine_id i;
317 int ret;
318
319 vgpu = vzalloc(sizeof(*vgpu));
320 if (!vgpu)
321 return ERR_PTR(-ENOMEM);
322
323 vgpu->id = IDLE_VGPU_IDR;
324 vgpu->gvt = gvt;
325 mutex_init(&vgpu->vgpu_lock);
326
327 for (i = 0; i < I915_NUM_ENGINES; i++)
328 INIT_LIST_HEAD(&vgpu->submission.workload_q_head[i]);
329
330 ret = intel_vgpu_init_sched_policy(vgpu);
331 if (ret)
332 goto out_free_vgpu;
333
334 vgpu->active = false;
335
336 return vgpu;
337
338out_free_vgpu:
339 vfree(vgpu);
340 return ERR_PTR(ret);
341}
342
343/**
344 * intel_gvt_destroy_vgpu - destroy an idle virtual GPU
345 * @vgpu: virtual GPU
346 *
347 * This function is called when user wants to destroy an idle virtual GPU.
348 *
349 */
350void intel_gvt_destroy_idle_vgpu(struct intel_vgpu *vgpu)
351{
352 mutex_lock(&vgpu->vgpu_lock);
353 intel_vgpu_clean_sched_policy(vgpu);
354 mutex_unlock(&vgpu->vgpu_lock);
355
356 vfree(vgpu);
357}
358
359static struct intel_vgpu *__intel_gvt_create_vgpu(struct intel_gvt *gvt,
360 struct intel_vgpu_creation_params *param)
361{
362 struct intel_vgpu *vgpu;
363 int ret;
364
365 gvt_dbg_core("handle %llu low %llu MB high %llu MB fence %llu\n",
366 param->handle, param->low_gm_sz, param->high_gm_sz,
367 param->fence_sz);
368
369 vgpu = vzalloc(sizeof(*vgpu));
370 if (!vgpu)
371 return ERR_PTR(-ENOMEM);
372
373 ret = idr_alloc(&gvt->vgpu_idr, vgpu, IDLE_VGPU_IDR + 1, GVT_MAX_VGPU,
374 GFP_KERNEL);
375 if (ret < 0)
376 goto out_free_vgpu;
377
378 vgpu->id = ret;
379 vgpu->handle = param->handle;
380 vgpu->gvt = gvt;
381 vgpu->sched_ctl.weight = param->weight;
382 mutex_init(&vgpu->vgpu_lock);
383 mutex_init(&vgpu->dmabuf_lock);
384 INIT_LIST_HEAD(&vgpu->dmabuf_obj_list_head);
385 INIT_RADIX_TREE(&vgpu->page_track_tree, GFP_KERNEL);
386 idr_init(&vgpu->object_idr);
387 intel_vgpu_init_cfg_space(vgpu, param->primary);
388
389 ret = intel_vgpu_init_mmio(vgpu);
390 if (ret)
391 goto out_clean_idr;
392
393 ret = intel_vgpu_alloc_resource(vgpu, param);
394 if (ret)
395 goto out_clean_vgpu_mmio;
396
397 populate_pvinfo_page(vgpu);
398
399 ret = intel_gvt_hypervisor_attach_vgpu(vgpu);
400 if (ret)
401 goto out_clean_vgpu_resource;
402
403 ret = intel_vgpu_init_gtt(vgpu);
404 if (ret)
405 goto out_detach_hypervisor_vgpu;
406
407 ret = intel_vgpu_init_opregion(vgpu);
408 if (ret)
409 goto out_clean_gtt;
410
411 ret = intel_vgpu_init_display(vgpu, param->resolution);
412 if (ret)
413 goto out_clean_opregion;
414
415 ret = intel_vgpu_setup_submission(vgpu);
416 if (ret)
417 goto out_clean_display;
418
419 ret = intel_vgpu_init_sched_policy(vgpu);
420 if (ret)
421 goto out_clean_submission;
422
423 intel_gvt_debugfs_add_vgpu(vgpu);
424
425 ret = intel_gvt_hypervisor_set_opregion(vgpu);
426 if (ret)
427 goto out_clean_sched_policy;
428
429 /*TODO: add more platforms support */
430 if (IS_SKYLAKE(gvt->dev_priv) || IS_KABYLAKE(gvt->dev_priv))
431 ret = intel_gvt_hypervisor_set_edid(vgpu, PORT_D);
432 if (ret)
433 goto out_clean_sched_policy;
434
435 return vgpu;
436
437out_clean_sched_policy:
438 intel_vgpu_clean_sched_policy(vgpu);
439out_clean_submission:
440 intel_vgpu_clean_submission(vgpu);
441out_clean_display:
442 intel_vgpu_clean_display(vgpu);
443out_clean_opregion:
444 intel_vgpu_clean_opregion(vgpu);
445out_clean_gtt:
446 intel_vgpu_clean_gtt(vgpu);
447out_detach_hypervisor_vgpu:
448 intel_gvt_hypervisor_detach_vgpu(vgpu);
449out_clean_vgpu_resource:
450 intel_vgpu_free_resource(vgpu);
451out_clean_vgpu_mmio:
452 intel_vgpu_clean_mmio(vgpu);
453out_clean_idr:
454 idr_remove(&gvt->vgpu_idr, vgpu->id);
455out_free_vgpu:
456 vfree(vgpu);
457 return ERR_PTR(ret);
458}
459
460/**
461 * intel_gvt_create_vgpu - create a virtual GPU
462 * @gvt: GVT device
463 * @type: type of the vGPU to create
464 *
465 * This function is called when user wants to create a virtual GPU.
466 *
467 * Returns:
468 * pointer to intel_vgpu, error pointer if failed.
469 */
470struct intel_vgpu *intel_gvt_create_vgpu(struct intel_gvt *gvt,
471 struct intel_vgpu_type *type)
472{
473 struct intel_vgpu_creation_params param;
474 struct intel_vgpu *vgpu;
475
476 param.handle = 0;
477 param.primary = 1;
478 param.low_gm_sz = type->low_gm_size;
479 param.high_gm_sz = type->high_gm_size;
480 param.fence_sz = type->fence;
481 param.weight = type->weight;
482 param.resolution = type->resolution;
483
484 /* XXX current param based on MB */
485 param.low_gm_sz = BYTES_TO_MB(param.low_gm_sz);
486 param.high_gm_sz = BYTES_TO_MB(param.high_gm_sz);
487
488 mutex_lock(&gvt->lock);
489 vgpu = __intel_gvt_create_vgpu(gvt, ¶m);
490 if (!IS_ERR(vgpu))
491 /* calculate left instance change for types */
492 intel_gvt_update_vgpu_types(gvt);
493 mutex_unlock(&gvt->lock);
494
495 return vgpu;
496}
497
498/**
499 * intel_gvt_reset_vgpu_locked - reset a virtual GPU by DMLR or GT reset
500 * @vgpu: virtual GPU
501 * @dmlr: vGPU Device Model Level Reset or GT Reset
502 * @engine_mask: engines to reset for GT reset
503 *
504 * This function is called when user wants to reset a virtual GPU through
505 * device model reset or GT reset. The caller should hold the vgpu lock.
506 *
507 * vGPU Device Model Level Reset (DMLR) simulates the PCI level reset to reset
508 * the whole vGPU to default state as when it is created. This vGPU function
509 * is required both for functionary and security concerns.The ultimate goal
510 * of vGPU FLR is that reuse a vGPU instance by virtual machines. When we
511 * assign a vGPU to a virtual machine we must isse such reset first.
512 *
513 * Full GT Reset and Per-Engine GT Reset are soft reset flow for GPU engines
514 * (Render, Blitter, Video, Video Enhancement). It is defined by GPU Spec.
515 * Unlike the FLR, GT reset only reset particular resource of a vGPU per
516 * the reset request. Guest driver can issue a GT reset by programming the
517 * virtual GDRST register to reset specific virtual GPU engine or all
518 * engines.
519 *
520 * The parameter dev_level is to identify if we will do DMLR or GT reset.
521 * The parameter engine_mask is to specific the engines that need to be
522 * resetted. If value ALL_ENGINES is given for engine_mask, it means
523 * the caller requests a full GT reset that we will reset all virtual
524 * GPU engines. For FLR, engine_mask is ignored.
525 */
526void intel_gvt_reset_vgpu_locked(struct intel_vgpu *vgpu, bool dmlr,
527 intel_engine_mask_t engine_mask)
528{
529 struct intel_gvt *gvt = vgpu->gvt;
530 struct intel_gvt_workload_scheduler *scheduler = &gvt->scheduler;
531 intel_engine_mask_t resetting_eng = dmlr ? ALL_ENGINES : engine_mask;
532
533 gvt_dbg_core("------------------------------------------\n");
534 gvt_dbg_core("resseting vgpu%d, dmlr %d, engine_mask %08x\n",
535 vgpu->id, dmlr, engine_mask);
536
537 vgpu->resetting_eng = resetting_eng;
538
539 intel_vgpu_stop_schedule(vgpu);
540 /*
541 * The current_vgpu will set to NULL after stopping the
542 * scheduler when the reset is triggered by current vgpu.
543 */
544 if (scheduler->current_vgpu == NULL) {
545 mutex_unlock(&vgpu->vgpu_lock);
546 intel_gvt_wait_vgpu_idle(vgpu);
547 mutex_lock(&vgpu->vgpu_lock);
548 }
549
550 intel_vgpu_reset_submission(vgpu, resetting_eng);
551 /* full GPU reset or device model level reset */
552 if (engine_mask == ALL_ENGINES || dmlr) {
553 intel_vgpu_select_submission_ops(vgpu, ALL_ENGINES, 0);
554 intel_vgpu_invalidate_ppgtt(vgpu);
555 /*fence will not be reset during virtual reset */
556 if (dmlr) {
557 intel_vgpu_reset_gtt(vgpu);
558 intel_vgpu_reset_resource(vgpu);
559 }
560
561 intel_vgpu_reset_mmio(vgpu, dmlr);
562 populate_pvinfo_page(vgpu);
563 intel_vgpu_reset_display(vgpu);
564
565 if (dmlr) {
566 intel_vgpu_reset_cfg_space(vgpu);
567 /* only reset the failsafe mode when dmlr reset */
568 vgpu->failsafe = false;
569 vgpu->pv_notified = false;
570 }
571 }
572
573 vgpu->resetting_eng = 0;
574 gvt_dbg_core("reset vgpu%d done\n", vgpu->id);
575 gvt_dbg_core("------------------------------------------\n");
576}
577
578/**
579 * intel_gvt_reset_vgpu - reset a virtual GPU (Function Level)
580 * @vgpu: virtual GPU
581 *
582 * This function is called when user wants to reset a virtual GPU.
583 *
584 */
585void intel_gvt_reset_vgpu(struct intel_vgpu *vgpu)
586{
587 mutex_lock(&vgpu->vgpu_lock);
588 intel_gvt_reset_vgpu_locked(vgpu, true, 0);
589 mutex_unlock(&vgpu->vgpu_lock);
590}