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33#include <linux/types.h>
34#include <linux/kthread.h>
35
36#include "i915_drv.h"
37#include "intel_gvt.h"
38#include "gvt.h"
39#include <linux/vfio.h>
40#include <linux/mdev.h>
41
42struct intel_gvt_host intel_gvt_host;
43
44static const char * const supported_hypervisors[] = {
45 [INTEL_GVT_HYPERVISOR_XEN] = "XEN",
46 [INTEL_GVT_HYPERVISOR_KVM] = "KVM",
47};
48
49static struct intel_vgpu_type *intel_gvt_find_vgpu_type(struct intel_gvt *gvt,
50 const char *name)
51{
52 const char *driver_name =
53 dev_driver_string(&gvt->gt->i915->drm.pdev->dev);
54 int i;
55
56 name += strlen(driver_name) + 1;
57 for (i = 0; i < gvt->num_types; i++) {
58 struct intel_vgpu_type *t = &gvt->types[i];
59
60 if (!strncmp(t->name, name, sizeof(t->name)))
61 return t;
62 }
63
64 return NULL;
65}
66
67static ssize_t available_instances_show(struct kobject *kobj,
68 struct device *dev, char *buf)
69{
70 struct intel_vgpu_type *type;
71 unsigned int num = 0;
72 void *gvt = kdev_to_i915(dev)->gvt;
73
74 type = intel_gvt_find_vgpu_type(gvt, kobject_name(kobj));
75 if (!type)
76 num = 0;
77 else
78 num = type->avail_instance;
79
80 return sprintf(buf, "%u\n", num);
81}
82
83static ssize_t device_api_show(struct kobject *kobj, struct device *dev,
84 char *buf)
85{
86 return sprintf(buf, "%s\n", VFIO_DEVICE_API_PCI_STRING);
87}
88
89static ssize_t description_show(struct kobject *kobj, struct device *dev,
90 char *buf)
91{
92 struct intel_vgpu_type *type;
93 void *gvt = kdev_to_i915(dev)->gvt;
94
95 type = intel_gvt_find_vgpu_type(gvt, kobject_name(kobj));
96 if (!type)
97 return 0;
98
99 return sprintf(buf, "low_gm_size: %dMB\nhigh_gm_size: %dMB\n"
100 "fence: %d\nresolution: %s\n"
101 "weight: %d\n",
102 BYTES_TO_MB(type->low_gm_size),
103 BYTES_TO_MB(type->high_gm_size),
104 type->fence, vgpu_edid_str(type->resolution),
105 type->weight);
106}
107
108static MDEV_TYPE_ATTR_RO(available_instances);
109static MDEV_TYPE_ATTR_RO(device_api);
110static MDEV_TYPE_ATTR_RO(description);
111
112static struct attribute *gvt_type_attrs[] = {
113 &mdev_type_attr_available_instances.attr,
114 &mdev_type_attr_device_api.attr,
115 &mdev_type_attr_description.attr,
116 NULL,
117};
118
119static struct attribute_group *gvt_vgpu_type_groups[] = {
120 [0 ... NR_MAX_INTEL_VGPU_TYPES - 1] = NULL,
121};
122
123static bool intel_get_gvt_attrs(struct attribute_group ***intel_vgpu_type_groups)
124{
125 *intel_vgpu_type_groups = gvt_vgpu_type_groups;
126 return true;
127}
128
129static int intel_gvt_init_vgpu_type_groups(struct intel_gvt *gvt)
130{
131 int i, j;
132 struct intel_vgpu_type *type;
133 struct attribute_group *group;
134
135 for (i = 0; i < gvt->num_types; i++) {
136 type = &gvt->types[i];
137
138 group = kzalloc(sizeof(struct attribute_group), GFP_KERNEL);
139 if (WARN_ON(!group))
140 goto unwind;
141
142 group->name = type->name;
143 group->attrs = gvt_type_attrs;
144 gvt_vgpu_type_groups[i] = group;
145 }
146
147 return 0;
148
149unwind:
150 for (j = 0; j < i; j++) {
151 group = gvt_vgpu_type_groups[j];
152 kfree(group);
153 }
154
155 return -ENOMEM;
156}
157
158static void intel_gvt_cleanup_vgpu_type_groups(struct intel_gvt *gvt)
159{
160 int i;
161 struct attribute_group *group;
162
163 for (i = 0; i < gvt->num_types; i++) {
164 group = gvt_vgpu_type_groups[i];
165 gvt_vgpu_type_groups[i] = NULL;
166 kfree(group);
167 }
168}
169
170static const struct intel_gvt_ops intel_gvt_ops = {
171 .emulate_cfg_read = intel_vgpu_emulate_cfg_read,
172 .emulate_cfg_write = intel_vgpu_emulate_cfg_write,
173 .emulate_mmio_read = intel_vgpu_emulate_mmio_read,
174 .emulate_mmio_write = intel_vgpu_emulate_mmio_write,
175 .vgpu_create = intel_gvt_create_vgpu,
176 .vgpu_destroy = intel_gvt_destroy_vgpu,
177 .vgpu_release = intel_gvt_release_vgpu,
178 .vgpu_reset = intel_gvt_reset_vgpu,
179 .vgpu_activate = intel_gvt_activate_vgpu,
180 .vgpu_deactivate = intel_gvt_deactivate_vgpu,
181 .gvt_find_vgpu_type = intel_gvt_find_vgpu_type,
182 .get_gvt_attrs = intel_get_gvt_attrs,
183 .vgpu_query_plane = intel_vgpu_query_plane,
184 .vgpu_get_dmabuf = intel_vgpu_get_dmabuf,
185 .write_protect_handler = intel_vgpu_page_track_handler,
186 .emulate_hotplug = intel_vgpu_emulate_hotplug,
187};
188
189static void init_device_info(struct intel_gvt *gvt)
190{
191 struct intel_gvt_device_info *info = &gvt->device_info;
192 struct pci_dev *pdev = gvt->gt->i915->drm.pdev;
193
194 info->max_support_vgpus = 8;
195 info->cfg_space_size = PCI_CFG_SPACE_EXP_SIZE;
196 info->mmio_size = 2 * 1024 * 1024;
197 info->mmio_bar = 0;
198 info->gtt_start_offset = 8 * 1024 * 1024;
199 info->gtt_entry_size = 8;
200 info->gtt_entry_size_shift = 3;
201 info->gmadr_bytes_in_cmd = 8;
202 info->max_surface_size = 36 * 1024 * 1024;
203 info->msi_cap_offset = pdev->msi_cap;
204}
205
206static int gvt_service_thread(void *data)
207{
208 struct intel_gvt *gvt = (struct intel_gvt *)data;
209 int ret;
210
211 gvt_dbg_core("service thread start\n");
212
213 while (!kthread_should_stop()) {
214 ret = wait_event_interruptible(gvt->service_thread_wq,
215 kthread_should_stop() || gvt->service_request);
216
217 if (kthread_should_stop())
218 break;
219
220 if (WARN_ONCE(ret, "service thread is waken up by signal.\n"))
221 continue;
222
223 if (test_and_clear_bit(INTEL_GVT_REQUEST_EMULATE_VBLANK,
224 (void *)&gvt->service_request))
225 intel_gvt_emulate_vblank(gvt);
226
227 if (test_bit(INTEL_GVT_REQUEST_SCHED,
228 (void *)&gvt->service_request) ||
229 test_bit(INTEL_GVT_REQUEST_EVENT_SCHED,
230 (void *)&gvt->service_request)) {
231 intel_gvt_schedule(gvt);
232 }
233 }
234
235 return 0;
236}
237
238static void clean_service_thread(struct intel_gvt *gvt)
239{
240 kthread_stop(gvt->service_thread);
241}
242
243static int init_service_thread(struct intel_gvt *gvt)
244{
245 init_waitqueue_head(&gvt->service_thread_wq);
246
247 gvt->service_thread = kthread_run(gvt_service_thread,
248 gvt, "gvt_service_thread");
249 if (IS_ERR(gvt->service_thread)) {
250 gvt_err("fail to start service thread.\n");
251 return PTR_ERR(gvt->service_thread);
252 }
253 return 0;
254}
255
256
257
258
259
260
261
262
263
264void intel_gvt_clean_device(struct drm_i915_private *i915)
265{
266 struct intel_gvt *gvt = fetch_and_zero(&i915->gvt);
267
268 if (drm_WARN_ON(&i915->drm, !gvt))
269 return;
270
271 intel_gvt_destroy_idle_vgpu(gvt->idle_vgpu);
272 intel_gvt_cleanup_vgpu_type_groups(gvt);
273 intel_gvt_clean_vgpu_types(gvt);
274
275 intel_gvt_debugfs_clean(gvt);
276 clean_service_thread(gvt);
277 intel_gvt_clean_cmd_parser(gvt);
278 intel_gvt_clean_sched_policy(gvt);
279 intel_gvt_clean_workload_scheduler(gvt);
280 intel_gvt_clean_gtt(gvt);
281 intel_gvt_clean_irq(gvt);
282 intel_gvt_free_firmware(gvt);
283 intel_gvt_clean_mmio_info(gvt);
284 idr_destroy(&gvt->vgpu_idr);
285
286 kfree(i915->gvt);
287}
288
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297
298
299
300int intel_gvt_init_device(struct drm_i915_private *i915)
301{
302 struct intel_gvt *gvt;
303 struct intel_vgpu *vgpu;
304 int ret;
305
306 if (drm_WARN_ON(&i915->drm, i915->gvt))
307 return -EEXIST;
308
309 gvt = kzalloc(sizeof(struct intel_gvt), GFP_KERNEL);
310 if (!gvt)
311 return -ENOMEM;
312
313 gvt_dbg_core("init gvt device\n");
314
315 idr_init_base(&gvt->vgpu_idr, 1);
316 spin_lock_init(&gvt->scheduler.mmio_context_lock);
317 mutex_init(&gvt->lock);
318 mutex_init(&gvt->sched_lock);
319 gvt->gt = &i915->gt;
320 i915->gvt = gvt;
321
322 init_device_info(gvt);
323
324 ret = intel_gvt_setup_mmio_info(gvt);
325 if (ret)
326 goto out_clean_idr;
327
328 intel_gvt_init_engine_mmio_context(gvt);
329
330 ret = intel_gvt_load_firmware(gvt);
331 if (ret)
332 goto out_clean_mmio_info;
333
334 ret = intel_gvt_init_irq(gvt);
335 if (ret)
336 goto out_free_firmware;
337
338 ret = intel_gvt_init_gtt(gvt);
339 if (ret)
340 goto out_clean_irq;
341
342 ret = intel_gvt_init_workload_scheduler(gvt);
343 if (ret)
344 goto out_clean_gtt;
345
346 ret = intel_gvt_init_sched_policy(gvt);
347 if (ret)
348 goto out_clean_workload_scheduler;
349
350 ret = intel_gvt_init_cmd_parser(gvt);
351 if (ret)
352 goto out_clean_sched_policy;
353
354 ret = init_service_thread(gvt);
355 if (ret)
356 goto out_clean_cmd_parser;
357
358 ret = intel_gvt_init_vgpu_types(gvt);
359 if (ret)
360 goto out_clean_thread;
361
362 ret = intel_gvt_init_vgpu_type_groups(gvt);
363 if (ret) {
364 gvt_err("failed to init vgpu type groups: %d\n", ret);
365 goto out_clean_types;
366 }
367
368 vgpu = intel_gvt_create_idle_vgpu(gvt);
369 if (IS_ERR(vgpu)) {
370 ret = PTR_ERR(vgpu);
371 gvt_err("failed to create idle vgpu\n");
372 goto out_clean_types;
373 }
374 gvt->idle_vgpu = vgpu;
375
376 intel_gvt_debugfs_init(gvt);
377
378 gvt_dbg_core("gvt device initialization is done\n");
379 intel_gvt_host.dev = &i915->drm.pdev->dev;
380 intel_gvt_host.initialized = true;
381 return 0;
382
383out_clean_types:
384 intel_gvt_clean_vgpu_types(gvt);
385out_clean_thread:
386 clean_service_thread(gvt);
387out_clean_cmd_parser:
388 intel_gvt_clean_cmd_parser(gvt);
389out_clean_sched_policy:
390 intel_gvt_clean_sched_policy(gvt);
391out_clean_workload_scheduler:
392 intel_gvt_clean_workload_scheduler(gvt);
393out_clean_gtt:
394 intel_gvt_clean_gtt(gvt);
395out_clean_irq:
396 intel_gvt_clean_irq(gvt);
397out_free_firmware:
398 intel_gvt_free_firmware(gvt);
399out_clean_mmio_info:
400 intel_gvt_clean_mmio_info(gvt);
401out_clean_idr:
402 idr_destroy(&gvt->vgpu_idr);
403 kfree(gvt);
404 i915->gvt = NULL;
405 return ret;
406}
407
408int
409intel_gvt_pm_resume(struct intel_gvt *gvt)
410{
411 intel_gvt_restore_fence(gvt);
412 intel_gvt_restore_mmio(gvt);
413 intel_gvt_restore_ggtt(gvt);
414 return 0;
415}
416
417int
418intel_gvt_register_hypervisor(const struct intel_gvt_mpt *m)
419{
420 int ret;
421 void *gvt;
422
423 if (!intel_gvt_host.initialized)
424 return -ENODEV;
425
426 if (m->type != INTEL_GVT_HYPERVISOR_KVM &&
427 m->type != INTEL_GVT_HYPERVISOR_XEN)
428 return -EINVAL;
429
430
431 if (!try_module_get(THIS_MODULE))
432 return -ENODEV;
433
434 intel_gvt_host.mpt = m;
435 intel_gvt_host.hypervisor_type = m->type;
436 gvt = (void *)kdev_to_i915(intel_gvt_host.dev)->gvt;
437
438 ret = intel_gvt_hypervisor_host_init(intel_gvt_host.dev, gvt,
439 &intel_gvt_ops);
440 if (ret < 0) {
441 gvt_err("Failed to init %s hypervisor module\n",
442 supported_hypervisors[intel_gvt_host.hypervisor_type]);
443 module_put(THIS_MODULE);
444 return -ENODEV;
445 }
446 gvt_dbg_core("Running with hypervisor %s in host mode\n",
447 supported_hypervisors[intel_gvt_host.hypervisor_type]);
448 return 0;
449}
450EXPORT_SYMBOL_GPL(intel_gvt_register_hypervisor);
451
452void
453intel_gvt_unregister_hypervisor(void)
454{
455 intel_gvt_hypervisor_host_exit(intel_gvt_host.dev);
456 module_put(THIS_MODULE);
457}
458EXPORT_SYMBOL_GPL(intel_gvt_unregister_hypervisor);
459
