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 * Kevin Tian <kevin.tian@intel.com>
25 * Eddie Dong <eddie.dong@intel.com>
28 * Niu Bing <bing.niu@intel.com>
29 * Zhi Wang <zhi.a.wang@intel.com>
33 #include <linux/types.h>
35 #include <linux/kthread.h>
38 #include "intel_gvt.h"
40 #include <linux/vfio.h>
41 #include <linux/mdev.h>
43 struct intel_gvt_host intel_gvt_host;
45 static const char * const supported_hypervisors[] = {
46 [INTEL_GVT_HYPERVISOR_XEN] = "XEN",
47 [INTEL_GVT_HYPERVISOR_KVM] = "KVM",
50 static struct intel_vgpu_type *intel_gvt_find_vgpu_type(struct intel_gvt *gvt,
53 const char *driver_name =
54 dev_driver_string(&gvt->gt->i915->drm.pdev->dev);
57 name += strlen(driver_name) + 1;
58 for (i = 0; i < gvt->num_types; i++) {
59 struct intel_vgpu_type *t = &gvt->types[i];
61 if (!strncmp(t->name, name, sizeof(t->name)))
68 static ssize_t available_instances_show(struct kobject *kobj,
69 struct device *dev, char *buf)
71 struct intel_vgpu_type *type;
73 void *gvt = kdev_to_i915(dev)->gvt;
75 type = intel_gvt_find_vgpu_type(gvt, kobject_name(kobj));
79 num = type->avail_instance;
81 return sprintf(buf, "%u\n", num);
84 static ssize_t device_api_show(struct kobject *kobj, struct device *dev,
87 return sprintf(buf, "%s\n", VFIO_DEVICE_API_PCI_STRING);
90 static ssize_t description_show(struct kobject *kobj, struct device *dev,
93 struct intel_vgpu_type *type;
94 void *gvt = kdev_to_i915(dev)->gvt;
96 type = intel_gvt_find_vgpu_type(gvt, kobject_name(kobj));
100 return sprintf(buf, "low_gm_size: %dMB\nhigh_gm_size: %dMB\n"
101 "fence: %d\nresolution: %s\n"
103 BYTES_TO_MB(type->low_gm_size),
104 BYTES_TO_MB(type->high_gm_size),
105 type->fence, vgpu_edid_str(type->resolution),
109 static MDEV_TYPE_ATTR_RO(available_instances);
110 static MDEV_TYPE_ATTR_RO(device_api);
111 static MDEV_TYPE_ATTR_RO(description);
113 static struct attribute *gvt_type_attrs[] = {
114 &mdev_type_attr_available_instances.attr,
115 &mdev_type_attr_device_api.attr,
116 &mdev_type_attr_description.attr,
120 static struct attribute_group *gvt_vgpu_type_groups[] = {
121 [0 ... NR_MAX_INTEL_VGPU_TYPES - 1] = NULL,
124 static bool intel_get_gvt_attrs(struct attribute_group ***intel_vgpu_type_groups)
126 *intel_vgpu_type_groups = gvt_vgpu_type_groups;
130 static bool intel_gvt_init_vgpu_type_groups(struct intel_gvt *gvt)
133 struct intel_vgpu_type *type;
134 struct attribute_group *group;
136 for (i = 0; i < gvt->num_types; i++) {
137 type = &gvt->types[i];
139 group = kzalloc(sizeof(struct attribute_group), GFP_KERNEL);
143 group->name = type->name;
144 group->attrs = gvt_type_attrs;
145 gvt_vgpu_type_groups[i] = group;
151 for (j = 0; j < i; j++) {
152 group = gvt_vgpu_type_groups[j];
159 static void intel_gvt_cleanup_vgpu_type_groups(struct intel_gvt *gvt)
162 struct attribute_group *group;
164 for (i = 0; i < gvt->num_types; i++) {
165 group = gvt_vgpu_type_groups[i];
166 gvt_vgpu_type_groups[i] = NULL;
171 static const struct intel_gvt_ops intel_gvt_ops = {
172 .emulate_cfg_read = intel_vgpu_emulate_cfg_read,
173 .emulate_cfg_write = intel_vgpu_emulate_cfg_write,
174 .emulate_mmio_read = intel_vgpu_emulate_mmio_read,
175 .emulate_mmio_write = intel_vgpu_emulate_mmio_write,
176 .vgpu_create = intel_gvt_create_vgpu,
177 .vgpu_destroy = intel_gvt_destroy_vgpu,
178 .vgpu_release = intel_gvt_release_vgpu,
179 .vgpu_reset = intel_gvt_reset_vgpu,
180 .vgpu_activate = intel_gvt_activate_vgpu,
181 .vgpu_deactivate = intel_gvt_deactivate_vgpu,
182 .gvt_find_vgpu_type = intel_gvt_find_vgpu_type,
183 .get_gvt_attrs = intel_get_gvt_attrs,
184 .vgpu_query_plane = intel_vgpu_query_plane,
185 .vgpu_get_dmabuf = intel_vgpu_get_dmabuf,
186 .write_protect_handler = intel_vgpu_page_track_handler,
187 .emulate_hotplug = intel_vgpu_emulate_hotplug,
190 static void init_device_info(struct intel_gvt *gvt)
192 struct intel_gvt_device_info *info = &gvt->device_info;
193 struct pci_dev *pdev = gvt->gt->i915->drm.pdev;
195 info->max_support_vgpus = 8;
196 info->cfg_space_size = PCI_CFG_SPACE_EXP_SIZE;
197 info->mmio_size = 2 * 1024 * 1024;
199 info->gtt_start_offset = 8 * 1024 * 1024;
200 info->gtt_entry_size = 8;
201 info->gtt_entry_size_shift = 3;
202 info->gmadr_bytes_in_cmd = 8;
203 info->max_surface_size = 36 * 1024 * 1024;
204 info->msi_cap_offset = pdev->msi_cap;
207 static int gvt_service_thread(void *data)
209 struct intel_gvt *gvt = (struct intel_gvt *)data;
212 gvt_dbg_core("service thread start\n");
214 while (!kthread_should_stop()) {
215 ret = wait_event_interruptible(gvt->service_thread_wq,
216 kthread_should_stop() || gvt->service_request);
218 if (kthread_should_stop())
221 if (WARN_ONCE(ret, "service thread is waken up by signal.\n"))
224 if (test_and_clear_bit(INTEL_GVT_REQUEST_EMULATE_VBLANK,
225 (void *)&gvt->service_request))
226 intel_gvt_emulate_vblank(gvt);
228 if (test_bit(INTEL_GVT_REQUEST_SCHED,
229 (void *)&gvt->service_request) ||
230 test_bit(INTEL_GVT_REQUEST_EVENT_SCHED,
231 (void *)&gvt->service_request)) {
232 intel_gvt_schedule(gvt);
239 static void clean_service_thread(struct intel_gvt *gvt)
241 kthread_stop(gvt->service_thread);
244 static int init_service_thread(struct intel_gvt *gvt)
246 init_waitqueue_head(&gvt->service_thread_wq);
248 gvt->service_thread = kthread_run(gvt_service_thread,
249 gvt, "gvt_service_thread");
250 if (IS_ERR(gvt->service_thread)) {
251 gvt_err("fail to start service thread.\n");
252 return PTR_ERR(gvt->service_thread);
258 * intel_gvt_clean_device - clean a GVT device
259 * @i915: i915 private
261 * This function is called at the driver unloading stage, to free the
262 * resources owned by a GVT device.
265 void intel_gvt_clean_device(struct drm_i915_private *i915)
267 struct intel_gvt *gvt = fetch_and_zero(&i915->gvt);
269 if (drm_WARN_ON(&i915->drm, !gvt))
272 intel_gvt_destroy_idle_vgpu(gvt->idle_vgpu);
273 intel_gvt_cleanup_vgpu_type_groups(gvt);
274 intel_gvt_clean_vgpu_types(gvt);
276 intel_gvt_debugfs_clean(gvt);
277 clean_service_thread(gvt);
278 intel_gvt_clean_cmd_parser(gvt);
279 intel_gvt_clean_sched_policy(gvt);
280 intel_gvt_clean_workload_scheduler(gvt);
281 intel_gvt_clean_gtt(gvt);
282 intel_gvt_clean_irq(gvt);
283 intel_gvt_free_firmware(gvt);
284 intel_gvt_clean_mmio_info(gvt);
285 idr_destroy(&gvt->vgpu_idr);
291 * intel_gvt_init_device - initialize a GVT device
292 * @i915: drm i915 private data
294 * This function is called at the initialization stage, to initialize
295 * necessary GVT components.
298 * Zero on success, negative error code if failed.
301 int intel_gvt_init_device(struct drm_i915_private *i915)
303 struct intel_gvt *gvt;
304 struct intel_vgpu *vgpu;
307 if (drm_WARN_ON(&i915->drm, i915->gvt))
310 gvt = kzalloc(sizeof(struct intel_gvt), GFP_KERNEL);
314 gvt_dbg_core("init gvt device\n");
316 idr_init(&gvt->vgpu_idr);
317 spin_lock_init(&gvt->scheduler.mmio_context_lock);
318 mutex_init(&gvt->lock);
319 mutex_init(&gvt->sched_lock);
323 init_device_info(gvt);
325 ret = intel_gvt_setup_mmio_info(gvt);
329 intel_gvt_init_engine_mmio_context(gvt);
331 ret = intel_gvt_load_firmware(gvt);
333 goto out_clean_mmio_info;
335 ret = intel_gvt_init_irq(gvt);
337 goto out_free_firmware;
339 ret = intel_gvt_init_gtt(gvt);
343 ret = intel_gvt_init_workload_scheduler(gvt);
347 ret = intel_gvt_init_sched_policy(gvt);
349 goto out_clean_workload_scheduler;
351 ret = intel_gvt_init_cmd_parser(gvt);
353 goto out_clean_sched_policy;
355 ret = init_service_thread(gvt);
357 goto out_clean_cmd_parser;
359 ret = intel_gvt_init_vgpu_types(gvt);
361 goto out_clean_thread;
363 ret = intel_gvt_init_vgpu_type_groups(gvt);
365 gvt_err("failed to init vgpu type groups: %d\n", ret);
366 goto out_clean_types;
369 vgpu = intel_gvt_create_idle_vgpu(gvt);
372 gvt_err("failed to create idle vgpu\n");
373 goto out_clean_types;
375 gvt->idle_vgpu = vgpu;
377 intel_gvt_debugfs_init(gvt);
379 gvt_dbg_core("gvt device initialization is done\n");
380 intel_gvt_host.dev = &i915->drm.pdev->dev;
381 intel_gvt_host.initialized = true;
385 intel_gvt_clean_vgpu_types(gvt);
387 clean_service_thread(gvt);
388 out_clean_cmd_parser:
389 intel_gvt_clean_cmd_parser(gvt);
390 out_clean_sched_policy:
391 intel_gvt_clean_sched_policy(gvt);
392 out_clean_workload_scheduler:
393 intel_gvt_clean_workload_scheduler(gvt);
395 intel_gvt_clean_gtt(gvt);
397 intel_gvt_clean_irq(gvt);
399 intel_gvt_free_firmware(gvt);
401 intel_gvt_clean_mmio_info(gvt);
403 idr_destroy(&gvt->vgpu_idr);
410 intel_gvt_register_hypervisor(struct intel_gvt_mpt *m)
415 if (!intel_gvt_host.initialized)
418 if (m->type != INTEL_GVT_HYPERVISOR_KVM &&
419 m->type != INTEL_GVT_HYPERVISOR_XEN)
422 /* Get a reference for device model module */
423 if (!try_module_get(THIS_MODULE))
426 intel_gvt_host.mpt = m;
427 intel_gvt_host.hypervisor_type = m->type;
428 gvt = (void *)kdev_to_i915(intel_gvt_host.dev)->gvt;
430 ret = intel_gvt_hypervisor_host_init(intel_gvt_host.dev, gvt,
433 gvt_err("Failed to init %s hypervisor module\n",
434 supported_hypervisors[intel_gvt_host.hypervisor_type]);
435 module_put(THIS_MODULE);
438 gvt_dbg_core("Running with hypervisor %s in host mode\n",
439 supported_hypervisors[intel_gvt_host.hypervisor_type]);
442 EXPORT_SYMBOL_GPL(intel_gvt_register_hypervisor);
445 intel_gvt_unregister_hypervisor(void)
447 intel_gvt_hypervisor_host_exit(intel_gvt_host.dev);
448 module_put(THIS_MODULE);
450 EXPORT_SYMBOL_GPL(intel_gvt_unregister_hypervisor);