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 
populate_pvinfo_page(struct intel_vgpu * vgpu)38 void populate_pvinfo_page(struct intel_vgpu *vgpu)
39 {
40 	struct drm_i915_private *i915 = vgpu->gvt->gt->i915;
41 	/* setup the ballooning information */
42 	vgpu_vreg64_t(vgpu, vgtif_reg(magic)) = VGT_MAGIC;
43 	vgpu_vreg_t(vgpu, vgtif_reg(version_major)) = 1;
44 	vgpu_vreg_t(vgpu, vgtif_reg(version_minor)) = 0;
45 	vgpu_vreg_t(vgpu, vgtif_reg(display_ready)) = 0;
46 	vgpu_vreg_t(vgpu, vgtif_reg(vgt_id)) = vgpu->id;
47 
48 	vgpu_vreg_t(vgpu, vgtif_reg(vgt_caps)) = VGT_CAPS_FULL_PPGTT;
49 	vgpu_vreg_t(vgpu, vgtif_reg(vgt_caps)) |= VGT_CAPS_HWSP_EMULATION;
50 	vgpu_vreg_t(vgpu, vgtif_reg(vgt_caps)) |= VGT_CAPS_HUGE_GTT;
51 
52 	vgpu_vreg_t(vgpu, vgtif_reg(avail_rs.mappable_gmadr.base)) =
53 		vgpu_aperture_gmadr_base(vgpu);
54 	vgpu_vreg_t(vgpu, vgtif_reg(avail_rs.mappable_gmadr.size)) =
55 		vgpu_aperture_sz(vgpu);
56 	vgpu_vreg_t(vgpu, vgtif_reg(avail_rs.nonmappable_gmadr.base)) =
57 		vgpu_hidden_gmadr_base(vgpu);
58 	vgpu_vreg_t(vgpu, vgtif_reg(avail_rs.nonmappable_gmadr.size)) =
59 		vgpu_hidden_sz(vgpu);
60 
61 	vgpu_vreg_t(vgpu, vgtif_reg(avail_rs.fence_num)) = vgpu_fence_sz(vgpu);
62 
63 	vgpu_vreg_t(vgpu, vgtif_reg(cursor_x_hot)) = UINT_MAX;
64 	vgpu_vreg_t(vgpu, vgtif_reg(cursor_y_hot)) = UINT_MAX;
65 
66 	gvt_dbg_core("Populate PVINFO PAGE for vGPU %d\n", vgpu->id);
67 	gvt_dbg_core("aperture base [GMADR] 0x%llx size 0x%llx\n",
68 		vgpu_aperture_gmadr_base(vgpu), vgpu_aperture_sz(vgpu));
69 	gvt_dbg_core("hidden base [GMADR] 0x%llx size=0x%llx\n",
70 		vgpu_hidden_gmadr_base(vgpu), vgpu_hidden_sz(vgpu));
71 	gvt_dbg_core("fence size %d\n", vgpu_fence_sz(vgpu));
72 
73 	drm_WARN_ON(&i915->drm, sizeof(struct vgt_if) != VGT_PVINFO_SIZE);
74 }
75 
76 /*
77  * vGPU type name is defined as GVTg_Vx_y which contains the physical GPU
78  * generation type (e.g V4 as BDW server, V5 as SKL server).
79  *
80  * Depening on the physical SKU resource, we might see vGPU types like
81  * GVTg_V4_8, GVTg_V4_4, GVTg_V4_2, etc. We can create different types of
82  * vGPU on same physical GPU depending on available resource. Each vGPU
83  * type will have a different number of avail_instance to indicate how
84  * many vGPU instance can be created for this type.
85  */
86 #define VGPU_MAX_WEIGHT 16
87 #define VGPU_WEIGHT(vgpu_num)	\
88 	(VGPU_MAX_WEIGHT / (vgpu_num))
89 
90 static const struct intel_vgpu_config intel_vgpu_configs[] = {
91 	{ MB_TO_BYTES(64), MB_TO_BYTES(384), 4, VGPU_WEIGHT(8), GVT_EDID_1024_768, "8" },
92 	{ MB_TO_BYTES(128), MB_TO_BYTES(512), 4, VGPU_WEIGHT(4), GVT_EDID_1920_1200, "4" },
93 	{ MB_TO_BYTES(256), MB_TO_BYTES(1024), 4, VGPU_WEIGHT(2), GVT_EDID_1920_1200, "2" },
94 	{ MB_TO_BYTES(512), MB_TO_BYTES(2048), 4, VGPU_WEIGHT(1), GVT_EDID_1920_1200, "1" },
95 };
96 
97 /**
98  * intel_gvt_init_vgpu_types - initialize vGPU type list
99  * @gvt : GVT device
100  *
101  * Initialize vGPU type list based on available resource.
102  *
103  */
intel_gvt_init_vgpu_types(struct intel_gvt * gvt)104 int intel_gvt_init_vgpu_types(struct intel_gvt *gvt)
105 {
106 	unsigned int low_avail = gvt_aperture_sz(gvt) - HOST_LOW_GM_SIZE;
107 	unsigned int high_avail = gvt_hidden_sz(gvt) - HOST_HIGH_GM_SIZE;
108 	unsigned int num_types = ARRAY_SIZE(intel_vgpu_configs);
109 	unsigned int i;
110 
111 	gvt->types = kcalloc(num_types, sizeof(struct intel_vgpu_type),
112 			     GFP_KERNEL);
113 	if (!gvt->types)
114 		return -ENOMEM;
115 
116 	gvt->mdev_types = kcalloc(num_types, sizeof(*gvt->mdev_types),
117 			     GFP_KERNEL);
118 	if (!gvt->mdev_types)
119 		goto out_free_types;
120 
121 	for (i = 0; i < num_types; ++i) {
122 		const struct intel_vgpu_config *conf = &intel_vgpu_configs[i];
123 
124 		if (low_avail / conf->low_mm == 0)
125 			break;
126 		if (conf->weight < 1 || conf->weight > VGPU_MAX_WEIGHT)
127 			goto out_free_mdev_types;
128 
129 		sprintf(gvt->types[i].name, "GVTg_V%u_%s",
130 			GRAPHICS_VER(gvt->gt->i915) == 8 ? 4 : 5, conf->name);
131 		gvt->types[i].conf = conf;
132 
133 		gvt_dbg_core("type[%d]: %s avail %u low %u high %u fence %u weight %u res %s\n",
134 			     i, gvt->types[i].name,
135 			     min(low_avail / conf->low_mm,
136 				 high_avail / conf->high_mm),
137 			     conf->low_mm, conf->high_mm, conf->fence,
138 			     conf->weight, vgpu_edid_str(conf->edid));
139 
140 		gvt->mdev_types[i] = &gvt->types[i].type;
141 		gvt->mdev_types[i]->sysfs_name = gvt->types[i].name;
142 	}
143 
144 	gvt->num_types = i;
145 	return 0;
146 
147 out_free_mdev_types:
148 	kfree(gvt->mdev_types);
149 out_free_types:
150 	kfree(gvt->types);
151 	return -EINVAL;
152 }
153 
intel_gvt_clean_vgpu_types(struct intel_gvt * gvt)154 void intel_gvt_clean_vgpu_types(struct intel_gvt *gvt)
155 {
156 	kfree(gvt->mdev_types);
157 	kfree(gvt->types);
158 }
159 
160 /**
161  * intel_gvt_active_vgpu - activate a virtual GPU
162  * @vgpu: virtual GPU
163  *
164  * This function is called when user wants to activate a virtual GPU.
165  *
166  */
intel_gvt_activate_vgpu(struct intel_vgpu * vgpu)167 void intel_gvt_activate_vgpu(struct intel_vgpu *vgpu)
168 {
169 	mutex_lock(&vgpu->vgpu_lock);
170 	vgpu->active = true;
171 	mutex_unlock(&vgpu->vgpu_lock);
172 }
173 
174 /**
175  * intel_gvt_deactive_vgpu - deactivate a virtual GPU
176  * @vgpu: virtual GPU
177  *
178  * This function is called when user wants to deactivate a virtual GPU.
179  * The virtual GPU will be stopped.
180  *
181  */
intel_gvt_deactivate_vgpu(struct intel_vgpu * vgpu)182 void intel_gvt_deactivate_vgpu(struct intel_vgpu *vgpu)
183 {
184 	mutex_lock(&vgpu->vgpu_lock);
185 
186 	vgpu->active = false;
187 
188 	if (atomic_read(&vgpu->submission.running_workload_num)) {
189 		mutex_unlock(&vgpu->vgpu_lock);
190 		intel_gvt_wait_vgpu_idle(vgpu);
191 		mutex_lock(&vgpu->vgpu_lock);
192 	}
193 
194 	intel_vgpu_stop_schedule(vgpu);
195 
196 	mutex_unlock(&vgpu->vgpu_lock);
197 }
198 
199 /**
200  * intel_gvt_release_vgpu - release a virtual GPU
201  * @vgpu: virtual GPU
202  *
203  * This function is called when user wants to release a virtual GPU.
204  * The virtual GPU will be stopped and all runtime information will be
205  * destroyed.
206  *
207  */
intel_gvt_release_vgpu(struct intel_vgpu * vgpu)208 void intel_gvt_release_vgpu(struct intel_vgpu *vgpu)
209 {
210 	intel_gvt_deactivate_vgpu(vgpu);
211 
212 	mutex_lock(&vgpu->vgpu_lock);
213 	vgpu->d3_entered = false;
214 	intel_vgpu_clean_workloads(vgpu, ALL_ENGINES);
215 	intel_vgpu_dmabuf_cleanup(vgpu);
216 	mutex_unlock(&vgpu->vgpu_lock);
217 }
218 
219 /**
220  * intel_gvt_destroy_vgpu - destroy a virtual GPU
221  * @vgpu: virtual GPU
222  *
223  * This function is called when user wants to destroy a virtual GPU.
224  *
225  */
intel_gvt_destroy_vgpu(struct intel_vgpu * vgpu)226 void intel_gvt_destroy_vgpu(struct intel_vgpu *vgpu)
227 {
228 	struct intel_gvt *gvt = vgpu->gvt;
229 	struct drm_i915_private *i915 = gvt->gt->i915;
230 
231 	drm_WARN(&i915->drm, vgpu->active, "vGPU is still active!\n");
232 
233 	/*
234 	 * remove idr first so later clean can judge if need to stop
235 	 * service if no active vgpu.
236 	 */
237 	mutex_lock(&gvt->lock);
238 	idr_remove(&gvt->vgpu_idr, vgpu->id);
239 	mutex_unlock(&gvt->lock);
240 
241 	mutex_lock(&vgpu->vgpu_lock);
242 	intel_gvt_debugfs_remove_vgpu(vgpu);
243 	intel_vgpu_clean_sched_policy(vgpu);
244 	intel_vgpu_clean_submission(vgpu);
245 	intel_vgpu_clean_display(vgpu);
246 	intel_vgpu_clean_opregion(vgpu);
247 	intel_vgpu_reset_ggtt(vgpu, true);
248 	intel_vgpu_clean_gtt(vgpu);
249 	intel_vgpu_detach_regions(vgpu);
250 	intel_vgpu_free_resource(vgpu);
251 	intel_vgpu_clean_mmio(vgpu);
252 	intel_vgpu_dmabuf_cleanup(vgpu);
253 	mutex_unlock(&vgpu->vgpu_lock);
254 }
255 
256 #define IDLE_VGPU_IDR 0
257 
258 /**
259  * intel_gvt_create_idle_vgpu - create an idle virtual GPU
260  * @gvt: GVT device
261  *
262  * This function is called when user wants to create an idle virtual GPU.
263  *
264  * Returns:
265  * pointer to intel_vgpu, error pointer if failed.
266  */
intel_gvt_create_idle_vgpu(struct intel_gvt * gvt)267 struct intel_vgpu *intel_gvt_create_idle_vgpu(struct intel_gvt *gvt)
268 {
269 	struct intel_vgpu *vgpu;
270 	enum intel_engine_id i;
271 	int ret;
272 
273 	vgpu = vzalloc(sizeof(*vgpu));
274 	if (!vgpu)
275 		return ERR_PTR(-ENOMEM);
276 
277 	vgpu->id = IDLE_VGPU_IDR;
278 	vgpu->gvt = gvt;
279 	mutex_init(&vgpu->vgpu_lock);
280 
281 	for (i = 0; i < I915_NUM_ENGINES; i++)
282 		INIT_LIST_HEAD(&vgpu->submission.workload_q_head[i]);
283 
284 	ret = intel_vgpu_init_sched_policy(vgpu);
285 	if (ret)
286 		goto out_free_vgpu;
287 
288 	vgpu->active = false;
289 
290 	return vgpu;
291 
292 out_free_vgpu:
293 	vfree(vgpu);
294 	return ERR_PTR(ret);
295 }
296 
297 /**
298  * intel_gvt_destroy_vgpu - destroy an idle virtual GPU
299  * @vgpu: virtual GPU
300  *
301  * This function is called when user wants to destroy an idle virtual GPU.
302  *
303  */
intel_gvt_destroy_idle_vgpu(struct intel_vgpu * vgpu)304 void intel_gvt_destroy_idle_vgpu(struct intel_vgpu *vgpu)
305 {
306 	mutex_lock(&vgpu->vgpu_lock);
307 	intel_vgpu_clean_sched_policy(vgpu);
308 	mutex_unlock(&vgpu->vgpu_lock);
309 
310 	vfree(vgpu);
311 }
312 
intel_gvt_create_vgpu(struct intel_vgpu * vgpu,const struct intel_vgpu_config * conf)313 int intel_gvt_create_vgpu(struct intel_vgpu *vgpu,
314 		const struct intel_vgpu_config *conf)
315 {
316 	struct intel_gvt *gvt = vgpu->gvt;
317 	struct drm_i915_private *dev_priv = gvt->gt->i915;
318 	int ret;
319 
320 	gvt_dbg_core("low %u MB high %u MB fence %u\n",
321 			BYTES_TO_MB(conf->low_mm), BYTES_TO_MB(conf->high_mm),
322 			conf->fence);
323 
324 	mutex_lock(&gvt->lock);
325 	ret = idr_alloc(&gvt->vgpu_idr, vgpu, IDLE_VGPU_IDR + 1, GVT_MAX_VGPU,
326 		GFP_KERNEL);
327 	if (ret < 0)
328 		goto out_unlock;;
329 
330 	vgpu->id = ret;
331 	vgpu->sched_ctl.weight = conf->weight;
332 	mutex_init(&vgpu->vgpu_lock);
333 	mutex_init(&vgpu->dmabuf_lock);
334 	INIT_LIST_HEAD(&vgpu->dmabuf_obj_list_head);
335 	INIT_RADIX_TREE(&vgpu->page_track_tree, GFP_KERNEL);
336 	idr_init_base(&vgpu->object_idr, 1);
337 	intel_vgpu_init_cfg_space(vgpu, 1);
338 	vgpu->d3_entered = false;
339 
340 	ret = intel_vgpu_init_mmio(vgpu);
341 	if (ret)
342 		goto out_clean_idr;
343 
344 	ret = intel_vgpu_alloc_resource(vgpu, conf);
345 	if (ret)
346 		goto out_clean_vgpu_mmio;
347 
348 	populate_pvinfo_page(vgpu);
349 
350 	ret = intel_vgpu_init_gtt(vgpu);
351 	if (ret)
352 		goto out_clean_vgpu_resource;
353 
354 	ret = intel_vgpu_init_opregion(vgpu);
355 	if (ret)
356 		goto out_clean_gtt;
357 
358 	ret = intel_vgpu_init_display(vgpu, conf->edid);
359 	if (ret)
360 		goto out_clean_opregion;
361 
362 	ret = intel_vgpu_setup_submission(vgpu);
363 	if (ret)
364 		goto out_clean_display;
365 
366 	ret = intel_vgpu_init_sched_policy(vgpu);
367 	if (ret)
368 		goto out_clean_submission;
369 
370 	intel_gvt_debugfs_add_vgpu(vgpu);
371 
372 	ret = intel_gvt_set_opregion(vgpu);
373 	if (ret)
374 		goto out_clean_sched_policy;
375 
376 	if (IS_BROADWELL(dev_priv) || IS_BROXTON(dev_priv))
377 		ret = intel_gvt_set_edid(vgpu, PORT_B);
378 	else
379 		ret = intel_gvt_set_edid(vgpu, PORT_D);
380 	if (ret)
381 		goto out_clean_sched_policy;
382 
383 	intel_gvt_update_reg_whitelist(vgpu);
384 	mutex_unlock(&gvt->lock);
385 	return 0;
386 
387 out_clean_sched_policy:
388 	intel_vgpu_clean_sched_policy(vgpu);
389 out_clean_submission:
390 	intel_vgpu_clean_submission(vgpu);
391 out_clean_display:
392 	intel_vgpu_clean_display(vgpu);
393 out_clean_opregion:
394 	intel_vgpu_clean_opregion(vgpu);
395 out_clean_gtt:
396 	intel_vgpu_clean_gtt(vgpu);
397 out_clean_vgpu_resource:
398 	intel_vgpu_free_resource(vgpu);
399 out_clean_vgpu_mmio:
400 	intel_vgpu_clean_mmio(vgpu);
401 out_clean_idr:
402 	idr_remove(&gvt->vgpu_idr, vgpu->id);
403 out_unlock:
404 	mutex_unlock(&gvt->lock);
405 	return ret;
406 }
407 
408 /**
409  * intel_gvt_reset_vgpu_locked - reset a virtual GPU by DMLR or GT reset
410  * @vgpu: virtual GPU
411  * @dmlr: vGPU Device Model Level Reset or GT Reset
412  * @engine_mask: engines to reset for GT reset
413  *
414  * This function is called when user wants to reset a virtual GPU through
415  * device model reset or GT reset. The caller should hold the vgpu lock.
416  *
417  * vGPU Device Model Level Reset (DMLR) simulates the PCI level reset to reset
418  * the whole vGPU to default state as when it is created. This vGPU function
419  * is required both for functionary and security concerns.The ultimate goal
420  * of vGPU FLR is that reuse a vGPU instance by virtual machines. When we
421  * assign a vGPU to a virtual machine we must isse such reset first.
422  *
423  * Full GT Reset and Per-Engine GT Reset are soft reset flow for GPU engines
424  * (Render, Blitter, Video, Video Enhancement). It is defined by GPU Spec.
425  * Unlike the FLR, GT reset only reset particular resource of a vGPU per
426  * the reset request. Guest driver can issue a GT reset by programming the
427  * virtual GDRST register to reset specific virtual GPU engine or all
428  * engines.
429  *
430  * The parameter dev_level is to identify if we will do DMLR or GT reset.
431  * The parameter engine_mask is to specific the engines that need to be
432  * resetted. If value ALL_ENGINES is given for engine_mask, it means
433  * the caller requests a full GT reset that we will reset all virtual
434  * GPU engines. For FLR, engine_mask is ignored.
435  */
intel_gvt_reset_vgpu_locked(struct intel_vgpu * vgpu,bool dmlr,intel_engine_mask_t engine_mask)436 void intel_gvt_reset_vgpu_locked(struct intel_vgpu *vgpu, bool dmlr,
437 				 intel_engine_mask_t engine_mask)
438 {
439 	struct intel_gvt *gvt = vgpu->gvt;
440 	struct intel_gvt_workload_scheduler *scheduler = &gvt->scheduler;
441 	intel_engine_mask_t resetting_eng = dmlr ? ALL_ENGINES : engine_mask;
442 
443 	gvt_dbg_core("------------------------------------------\n");
444 	gvt_dbg_core("resseting vgpu%d, dmlr %d, engine_mask %08x\n",
445 		     vgpu->id, dmlr, engine_mask);
446 
447 	vgpu->resetting_eng = resetting_eng;
448 
449 	intel_vgpu_stop_schedule(vgpu);
450 	/*
451 	 * The current_vgpu will set to NULL after stopping the
452 	 * scheduler when the reset is triggered by current vgpu.
453 	 */
454 	if (scheduler->current_vgpu == NULL) {
455 		mutex_unlock(&vgpu->vgpu_lock);
456 		intel_gvt_wait_vgpu_idle(vgpu);
457 		mutex_lock(&vgpu->vgpu_lock);
458 	}
459 
460 	intel_vgpu_reset_submission(vgpu, resetting_eng);
461 	/* full GPU reset or device model level reset */
462 	if (engine_mask == ALL_ENGINES || dmlr) {
463 		intel_vgpu_select_submission_ops(vgpu, ALL_ENGINES, 0);
464 		if (engine_mask == ALL_ENGINES)
465 			intel_vgpu_invalidate_ppgtt(vgpu);
466 		/*fence will not be reset during virtual reset */
467 		if (dmlr) {
468 			if(!vgpu->d3_entered) {
469 				intel_vgpu_invalidate_ppgtt(vgpu);
470 				intel_vgpu_destroy_all_ppgtt_mm(vgpu);
471 			}
472 			intel_vgpu_reset_ggtt(vgpu, true);
473 			intel_vgpu_reset_resource(vgpu);
474 		}
475 
476 		intel_vgpu_reset_mmio(vgpu, dmlr);
477 		populate_pvinfo_page(vgpu);
478 
479 		if (dmlr) {
480 			intel_vgpu_reset_display(vgpu);
481 			intel_vgpu_reset_cfg_space(vgpu);
482 			/* only reset the failsafe mode when dmlr reset */
483 			vgpu->failsafe = false;
484 			/*
485 			 * PCI_D0 is set before dmlr, so reset d3_entered here
486 			 * after done using.
487 			 */
488 			if(vgpu->d3_entered)
489 				vgpu->d3_entered = false;
490 			else
491 				vgpu->pv_notified = false;
492 		}
493 	}
494 
495 	vgpu->resetting_eng = 0;
496 	gvt_dbg_core("reset vgpu%d done\n", vgpu->id);
497 	gvt_dbg_core("------------------------------------------\n");
498 }
499 
500 /**
501  * intel_gvt_reset_vgpu - reset a virtual GPU (Function Level)
502  * @vgpu: virtual GPU
503  *
504  * This function is called when user wants to reset a virtual GPU.
505  *
506  */
intel_gvt_reset_vgpu(struct intel_vgpu * vgpu)507 void intel_gvt_reset_vgpu(struct intel_vgpu *vgpu)
508 {
509 	mutex_lock(&vgpu->vgpu_lock);
510 	intel_gvt_reset_vgpu_locked(vgpu, true, 0);
511 	mutex_unlock(&vgpu->vgpu_lock);
512 }
513