summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/i915/gvt/vgpu.c
blob: 41cfa5ccae84ce4020c6b2ff4a051ce8e17f6298 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
/*
 * Copyright(c) 2011-2016 Intel Corporation. All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 * Authors:
 *    Eddie Dong <eddie.dong@intel.com>
 *    Kevin Tian <kevin.tian@intel.com>
 *
 * Contributors:
 *    Ping Gao <ping.a.gao@intel.com>
 *    Zhi Wang <zhi.a.wang@intel.com>
 *    Bing Niu <bing.niu@intel.com>
 *
 */

#include "i915_drv.h"
#include "gvt.h"
#include "i915_pvinfo.h"

void populate_pvinfo_page(struct intel_vgpu *vgpu)
{
	/* setup the ballooning information */
	vgpu_vreg64(vgpu, vgtif_reg(magic)) = VGT_MAGIC;
	vgpu_vreg(vgpu, vgtif_reg(version_major)) = 1;
	vgpu_vreg(vgpu, vgtif_reg(version_minor)) = 0;
	vgpu_vreg(vgpu, vgtif_reg(display_ready)) = 0;
	vgpu_vreg(vgpu, vgtif_reg(vgt_id)) = vgpu->id;
	vgpu_vreg(vgpu, vgtif_reg(avail_rs.mappable_gmadr.base)) =
		vgpu_aperture_gmadr_base(vgpu);
	vgpu_vreg(vgpu, vgtif_reg(avail_rs.mappable_gmadr.size)) =
		vgpu_aperture_sz(vgpu);
	vgpu_vreg(vgpu, vgtif_reg(avail_rs.nonmappable_gmadr.base)) =
		vgpu_hidden_gmadr_base(vgpu);
	vgpu_vreg(vgpu, vgtif_reg(avail_rs.nonmappable_gmadr.size)) =
		vgpu_hidden_sz(vgpu);

	vgpu_vreg(vgpu, vgtif_reg(avail_rs.fence_num)) = vgpu_fence_sz(vgpu);

	gvt_dbg_core("Populate PVINFO PAGE for vGPU %d\n", vgpu->id);
	gvt_dbg_core("aperture base [GMADR] 0x%llx size 0x%llx\n",
		vgpu_aperture_gmadr_base(vgpu), vgpu_aperture_sz(vgpu));
	gvt_dbg_core("hidden base [GMADR] 0x%llx size=0x%llx\n",
		vgpu_hidden_gmadr_base(vgpu), vgpu_hidden_sz(vgpu));
	gvt_dbg_core("fence size %d\n", vgpu_fence_sz(vgpu));

	WARN_ON(sizeof(struct vgt_if) != VGT_PVINFO_SIZE);
}

static struct {
	unsigned int low_mm;
	unsigned int high_mm;
	unsigned int fence;
	enum intel_vgpu_edid edid;
	char *name;
} vgpu_types[] = {
/* Fixed vGPU type table */
	{ MB_TO_BYTES(64), MB_TO_BYTES(512), 4, GVT_EDID_1024_768, "8" },
	{ MB_TO_BYTES(128), MB_TO_BYTES(512), 4, GVT_EDID_1920_1200, "4" },
	{ MB_TO_BYTES(256), MB_TO_BYTES(1024), 4, GVT_EDID_1920_1200, "2" },
	{ MB_TO_BYTES(512), MB_TO_BYTES(2048), 4, GVT_EDID_1920_1200, "1" },
};

/**
 * intel_gvt_init_vgpu_types - initialize vGPU type list
 * @gvt : GVT device
 *
 * Initialize vGPU type list based on available resource.
 *
 */
int intel_gvt_init_vgpu_types(struct intel_gvt *gvt)
{
	unsigned int num_types;
	unsigned int i, low_avail, high_avail;
	unsigned int min_low;

	/* vGPU type name is defined as GVTg_Vx_y which contains
	 * physical GPU generation type (e.g V4 as BDW server, V5 as
	 * SKL server).
	 *
	 * Depend on physical SKU resource, might see vGPU types like
	 * GVTg_V4_8, GVTg_V4_4, GVTg_V4_2, etc. We can create
	 * different types of vGPU on same physical GPU depending on
	 * available resource. Each vGPU type will have "avail_instance"
	 * to indicate how many vGPU instance can be created for this
	 * type.
	 *
	 */
	low_avail = gvt_aperture_sz(gvt) - HOST_LOW_GM_SIZE;
	high_avail = gvt_hidden_sz(gvt) - HOST_HIGH_GM_SIZE;
	num_types = sizeof(vgpu_types) / sizeof(vgpu_types[0]);

	gvt->types = kzalloc(num_types * sizeof(struct intel_vgpu_type),
			     GFP_KERNEL);
	if (!gvt->types)
		return -ENOMEM;

	min_low = MB_TO_BYTES(32);
	for (i = 0; i < num_types; ++i) {
		if (low_avail / vgpu_types[i].low_mm == 0)
			break;

		gvt->types[i].low_gm_size = vgpu_types[i].low_mm;
		gvt->types[i].high_gm_size = vgpu_types[i].high_mm;
		gvt->types[i].fence = vgpu_types[i].fence;
		gvt->types[i].resolution = vgpu_types[i].edid;
		gvt->types[i].avail_instance = min(low_avail / vgpu_types[i].low_mm,
						   high_avail / vgpu_types[i].high_mm);

		if (IS_GEN8(gvt->dev_priv))
			sprintf(gvt->types[i].name, "GVTg_V4_%s",
						vgpu_types[i].name);
		else if (IS_GEN9(gvt->dev_priv))
			sprintf(gvt->types[i].name, "GVTg_V5_%s",
						vgpu_types[i].name);

		gvt_dbg_core("type[%d]: %s avail %u low %u high %u fence %u res %s\n",
			     i, gvt->types[i].name,
			     gvt->types[i].avail_instance,
			     gvt->types[i].low_gm_size,
			     gvt->types[i].high_gm_size, gvt->types[i].fence,
			     vgpu_edid_str(gvt->types[i].resolution));
	}

	gvt->num_types = i;
	return 0;
}

void intel_gvt_clean_vgpu_types(struct intel_gvt *gvt)
{
	kfree(gvt->types);
}

static void intel_gvt_update_vgpu_types(struct intel_gvt *gvt)
{
	int i;
	unsigned int low_gm_avail, high_gm_avail, fence_avail;
	unsigned int low_gm_min, high_gm_min, fence_min;

	/* Need to depend on maxium hw resource size but keep on
	 * static config for now.
	 */
	low_gm_avail = gvt_aperture_sz(gvt) - HOST_LOW_GM_SIZE -
		gvt->gm.vgpu_allocated_low_gm_size;
	high_gm_avail = gvt_hidden_sz(gvt) - HOST_HIGH_GM_SIZE -
		gvt->gm.vgpu_allocated_high_gm_size;
	fence_avail = gvt_fence_sz(gvt) - HOST_FENCE -
		gvt->fence.vgpu_allocated_fence_num;

	for (i = 0; i < gvt->num_types; i++) {
		low_gm_min = low_gm_avail / gvt->types[i].low_gm_size;
		high_gm_min = high_gm_avail / gvt->types[i].high_gm_size;
		fence_min = fence_avail / gvt->types[i].fence;
		gvt->types[i].avail_instance = min(min(low_gm_min, high_gm_min),
						   fence_min);

		gvt_dbg_core("update type[%d]: %s avail %u low %u high %u fence %u\n",
		       i, gvt->types[i].name,
		       gvt->types[i].avail_instance, gvt->types[i].low_gm_size,
		       gvt->types[i].high_gm_size, gvt->types[i].fence);
	}
}

/**
 * intel_gvt_destroy_vgpu - destroy a virtual GPU
 * @vgpu: virtual GPU
 *
 * This function is called when user wants to destroy a virtual GPU.
 *
 */
void intel_gvt_destroy_vgpu(struct intel_vgpu *vgpu)
{
	struct intel_gvt *gvt = vgpu->gvt;

	mutex_lock(&gvt->lock);

	vgpu->active = false;
	idr_remove(&gvt->vgpu_idr, vgpu->id);

	if (atomic_read(&vgpu->running_workload_num)) {
		mutex_unlock(&gvt->lock);
		intel_gvt_wait_vgpu_idle(vgpu);
		mutex_lock(&gvt->lock);
	}

	intel_vgpu_stop_schedule(vgpu);
	intel_vgpu_clean_sched_policy(vgpu);
	intel_vgpu_clean_gvt_context(vgpu);
	intel_vgpu_clean_execlist(vgpu);
	intel_vgpu_clean_display(vgpu);
	intel_vgpu_clean_opregion(vgpu);
	intel_vgpu_clean_gtt(vgpu);
	intel_gvt_hypervisor_detach_vgpu(vgpu);
	intel_vgpu_free_resource(vgpu);
	intel_vgpu_clean_mmio(vgpu);
	vfree(vgpu);

	intel_gvt_update_vgpu_types(gvt);
	mutex_unlock(&gvt->lock);
}

static struct intel_vgpu *__intel_gvt_create_vgpu(struct intel_gvt *gvt,
		struct intel_vgpu_creation_params *param)
{
	struct intel_vgpu *vgpu;
	int ret;

	gvt_dbg_core("handle %llu low %llu MB high %llu MB fence %llu\n",
			param->handle, param->low_gm_sz, param->high_gm_sz,
			param->fence_sz);

	vgpu = vzalloc(sizeof(*vgpu));
	if (!vgpu)
		return ERR_PTR(-ENOMEM);

	mutex_lock(&gvt->lock);

	ret = idr_alloc(&gvt->vgpu_idr, vgpu, 1, GVT_MAX_VGPU, GFP_KERNEL);
	if (ret < 0)
		goto out_free_vgpu;

	vgpu->id = ret;
	vgpu->handle = param->handle;
	vgpu->gvt = gvt;
	bitmap_zero(vgpu->tlb_handle_pending, I915_NUM_ENGINES);

	intel_vgpu_init_cfg_space(vgpu, param->primary);

	ret = intel_vgpu_init_mmio(vgpu);
	if (ret)
		goto out_clean_idr;

	ret = intel_vgpu_alloc_resource(vgpu, param);
	if (ret)
		goto out_clean_vgpu_mmio;

	populate_pvinfo_page(vgpu);

	ret = intel_gvt_hypervisor_attach_vgpu(vgpu);
	if (ret)
		goto out_clean_vgpu_resource;

	ret = intel_vgpu_init_gtt(vgpu);
	if (ret)
		goto out_detach_hypervisor_vgpu;

	ret = intel_vgpu_init_display(vgpu, param->resolution);
	if (ret)
		goto out_clean_gtt;

	ret = intel_vgpu_init_execlist(vgpu);
	if (ret)
		goto out_clean_display;

	ret = intel_vgpu_init_gvt_context(vgpu);
	if (ret)
		goto out_clean_execlist;

	ret = intel_vgpu_init_sched_policy(vgpu);
	if (ret)
		goto out_clean_shadow_ctx;

	vgpu->active = true;
	mutex_unlock(&gvt->lock);

	return vgpu;

out_clean_shadow_ctx:
	intel_vgpu_clean_gvt_context(vgpu);
out_clean_execlist:
	intel_vgpu_clean_execlist(vgpu);
out_clean_display:
	intel_vgpu_clean_display(vgpu);
out_clean_gtt:
	intel_vgpu_clean_gtt(vgpu);
out_detach_hypervisor_vgpu:
	intel_gvt_hypervisor_detach_vgpu(vgpu);
out_clean_vgpu_resource:
	intel_vgpu_free_resource(vgpu);
out_clean_vgpu_mmio:
	intel_vgpu_clean_mmio(vgpu);
out_clean_idr:
	idr_remove(&gvt->vgpu_idr, vgpu->id);
out_free_vgpu:
	vfree(vgpu);
	mutex_unlock(&gvt->lock);
	return ERR_PTR(ret);
}

/**
 * intel_gvt_create_vgpu - create a virtual GPU
 * @gvt: GVT device
 * @type: type of the vGPU to create
 *
 * This function is called when user wants to create a virtual GPU.
 *
 * Returns:
 * pointer to intel_vgpu, error pointer if failed.
 */
struct intel_vgpu *intel_gvt_create_vgpu(struct intel_gvt *gvt,
				struct intel_vgpu_type *type)
{
	struct intel_vgpu_creation_params param;
	struct intel_vgpu *vgpu;

	param.handle = 0;
	param.primary = 1;
	param.low_gm_sz = type->low_gm_size;
	param.high_gm_sz = type->high_gm_size;
	param.fence_sz = type->fence;
	param.resolution = type->resolution;

	/* XXX current param based on MB */
	param.low_gm_sz = BYTES_TO_MB(param.low_gm_sz);
	param.high_gm_sz = BYTES_TO_MB(param.high_gm_sz);

	vgpu = __intel_gvt_create_vgpu(gvt, &param);
	if (IS_ERR(vgpu))
		return vgpu;

	/* calculate left instance change for types */
	intel_gvt_update_vgpu_types(gvt);

	return vgpu;
}

/**
 * intel_gvt_reset_vgpu_locked - reset a virtual GPU by DMLR or GT reset
 * @vgpu: virtual GPU
 * @dmlr: vGPU Device Model Level Reset or GT Reset
 * @engine_mask: engines to reset for GT reset
 *
 * This function is called when user wants to reset a virtual GPU through
 * device model reset or GT reset. The caller should hold the gvt lock.
 *
 * vGPU Device Model Level Reset (DMLR) simulates the PCI level reset to reset
 * the whole vGPU to default state as when it is created. This vGPU function
 * is required both for functionary and security concerns.The ultimate goal
 * of vGPU FLR is that reuse a vGPU instance by virtual machines. When we
 * assign a vGPU to a virtual machine we must isse such reset first.
 *
 * Full GT Reset and Per-Engine GT Reset are soft reset flow for GPU engines
 * (Render, Blitter, Video, Video Enhancement). It is defined by GPU Spec.
 * Unlike the FLR, GT reset only reset particular resource of a vGPU per
 * the reset request. Guest driver can issue a GT reset by programming the
 * virtual GDRST register to reset specific virtual GPU engine or all
 * engines.
 *
 * The parameter dev_level is to identify if we will do DMLR or GT reset.
 * The parameter engine_mask is to specific the engines that need to be
 * resetted. If value ALL_ENGINES is given for engine_mask, it means
 * the caller requests a full GT reset that we will reset all virtual
 * GPU engines. For FLR, engine_mask is ignored.
 */
void intel_gvt_reset_vgpu_locked(struct intel_vgpu *vgpu, bool dmlr,
				 unsigned int engine_mask)
{
	struct intel_gvt *gvt = vgpu->gvt;
	struct intel_gvt_workload_scheduler *scheduler = &gvt->scheduler;

	gvt_dbg_core("------------------------------------------\n");
	gvt_dbg_core("resseting vgpu%d, dmlr %d, engine_mask %08x\n",
		     vgpu->id, dmlr, engine_mask);
	vgpu->resetting = true;

	intel_vgpu_stop_schedule(vgpu);
	/*
	 * The current_vgpu will set to NULL after stopping the
	 * scheduler when the reset is triggered by current vgpu.
	 */
	if (scheduler->current_vgpu == NULL) {
		mutex_unlock(&gvt->lock);
		intel_gvt_wait_vgpu_idle(vgpu);
		mutex_lock(&gvt->lock);
	}

	intel_vgpu_reset_execlist(vgpu, dmlr ? ALL_ENGINES : engine_mask);

	/* full GPU reset or device model level reset */
	if (engine_mask == ALL_ENGINES || dmlr) {
		intel_vgpu_reset_gtt(vgpu, dmlr);
		intel_vgpu_reset_resource(vgpu);
		intel_vgpu_reset_mmio(vgpu);
		populate_pvinfo_page(vgpu);
		intel_vgpu_reset_display(vgpu);

		if (dmlr) {
			intel_vgpu_reset_cfg_space(vgpu);
			/* only reset the failsafe mode when dmlr reset */
			vgpu->failsafe = false;
			vgpu->pv_notified = false;
		}
	}

	vgpu->resetting = false;
	gvt_dbg_core("reset vgpu%d done\n", vgpu->id);
	gvt_dbg_core("------------------------------------------\n");
}

/**
 * intel_gvt_reset_vgpu - reset a virtual GPU (Function Level)
 * @vgpu: virtual GPU
 *
 * This function is called when user wants to reset a virtual GPU.
 *
 */
void intel_gvt_reset_vgpu(struct intel_vgpu *vgpu)
{
	mutex_lock(&vgpu->gvt->lock);
	intel_gvt_reset_vgpu_locked(vgpu, true, 0);
	mutex_unlock(&vgpu->gvt->lock);
}