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>
40 struct intel_gvt_host intel_gvt_host;
42 static const char * const supported_hypervisors[] = {
43 [INTEL_GVT_HYPERVISOR_XEN] = "XEN",
44 [INTEL_GVT_HYPERVISOR_KVM] = "KVM",
47 static const struct intel_gvt_ops intel_gvt_ops = {
48 .emulate_cfg_read = intel_vgpu_emulate_cfg_read,
49 .emulate_cfg_write = intel_vgpu_emulate_cfg_write,
50 .emulate_mmio_read = intel_vgpu_emulate_mmio_read,
51 .emulate_mmio_write = intel_vgpu_emulate_mmio_write,
52 .vgpu_create = intel_gvt_create_vgpu,
53 .vgpu_destroy = intel_gvt_destroy_vgpu,
54 .vgpu_reset = intel_gvt_reset_vgpu,
58 * intel_gvt_init_host - Load MPT modules and detect if we're running in host
59 * @gvt: intel gvt device
61 * This function is called at the driver loading stage. If failed to find a
62 * loadable MPT module or detect currently we're running in a VM, then GVT-g
66 * Zero on success, negative error code if failed.
69 int intel_gvt_init_host(void)
73 if (intel_gvt_host.initialized)
77 if (xen_domain() && !xen_initial_domain())
80 /* Try to load MPT modules for hypervisors */
81 if (xen_initial_domain()) {
83 intel_gvt_host.mpt = try_then_request_module(
84 symbol_get(xengt_mpt), "xengt");
85 intel_gvt_host.hypervisor_type = INTEL_GVT_HYPERVISOR_XEN;
87 #if IS_ENABLED(CONFIG_DRM_I915_GVT_KVMGT)
88 /* not in Xen. Try KVMGT */
89 intel_gvt_host.mpt = try_then_request_module(
90 symbol_get(kvmgt_mpt), "kvmgt");
91 intel_gvt_host.hypervisor_type = INTEL_GVT_HYPERVISOR_KVM;
95 /* Fail to load MPT modules - bail out */
96 if (!intel_gvt_host.mpt)
99 /* Try to detect if we're running in host instead of VM. */
100 ret = intel_gvt_hypervisor_detect_host();
104 gvt_dbg_core("Running with hypervisor %s in host mode\n",
105 supported_hypervisors[intel_gvt_host.hypervisor_type]);
107 intel_gvt_host.initialized = true;
111 static void init_device_info(struct intel_gvt *gvt)
113 struct intel_gvt_device_info *info = &gvt->device_info;
114 struct pci_dev *pdev = gvt->dev_priv->drm.pdev;
116 if (IS_BROADWELL(gvt->dev_priv) || IS_SKYLAKE(gvt->dev_priv)) {
117 info->max_support_vgpus = 8;
118 info->cfg_space_size = 256;
119 info->mmio_size = 2 * 1024 * 1024;
121 info->gtt_start_offset = 8 * 1024 * 1024;
122 info->gtt_entry_size = 8;
123 info->gtt_entry_size_shift = 3;
124 info->gmadr_bytes_in_cmd = 8;
125 info->max_surface_size = 36 * 1024 * 1024;
127 info->msi_cap_offset = pdev->msi_cap;
130 static int gvt_service_thread(void *data)
132 struct intel_gvt *gvt = (struct intel_gvt *)data;
135 gvt_dbg_core("service thread start\n");
137 while (!kthread_should_stop()) {
138 ret = wait_event_interruptible(gvt->service_thread_wq,
139 kthread_should_stop() || gvt->service_request);
141 if (kthread_should_stop())
144 if (WARN_ONCE(ret, "service thread is waken up by signal.\n"))
147 if (test_and_clear_bit(INTEL_GVT_REQUEST_EMULATE_VBLANK,
148 (void *)&gvt->service_request)) {
149 mutex_lock(&gvt->lock);
150 intel_gvt_emulate_vblank(gvt);
151 mutex_unlock(&gvt->lock);
158 static void clean_service_thread(struct intel_gvt *gvt)
160 kthread_stop(gvt->service_thread);
163 static int init_service_thread(struct intel_gvt *gvt)
165 init_waitqueue_head(&gvt->service_thread_wq);
167 gvt->service_thread = kthread_run(gvt_service_thread,
168 gvt, "gvt_service_thread");
169 if (IS_ERR(gvt->service_thread)) {
170 gvt_err("fail to start service thread.\n");
171 return PTR_ERR(gvt->service_thread);
177 * intel_gvt_clean_device - clean a GVT device
178 * @gvt: intel gvt device
180 * This function is called at the driver unloading stage, to free the
181 * resources owned by a GVT device.
184 void intel_gvt_clean_device(struct drm_i915_private *dev_priv)
186 struct intel_gvt *gvt = to_gvt(dev_priv);
191 clean_service_thread(gvt);
192 intel_gvt_clean_cmd_parser(gvt);
193 intel_gvt_clean_sched_policy(gvt);
194 intel_gvt_clean_workload_scheduler(gvt);
195 intel_gvt_clean_opregion(gvt);
196 intel_gvt_clean_gtt(gvt);
197 intel_gvt_clean_irq(gvt);
198 intel_gvt_clean_mmio_info(gvt);
199 intel_gvt_free_firmware(gvt);
201 intel_gvt_hypervisor_host_exit(&dev_priv->drm.pdev->dev, gvt);
202 intel_gvt_clean_vgpu_types(gvt);
204 idr_destroy(&gvt->vgpu_idr);
206 kfree(dev_priv->gvt);
207 dev_priv->gvt = NULL;
211 * intel_gvt_init_device - initialize a GVT device
212 * @dev_priv: drm i915 private data
214 * This function is called at the initialization stage, to initialize
215 * necessary GVT components.
218 * Zero on success, negative error code if failed.
221 int intel_gvt_init_device(struct drm_i915_private *dev_priv)
223 struct intel_gvt *gvt;
227 * Cannot initialize GVT device without intel_gvt_host gets
230 if (WARN_ON(!intel_gvt_host.initialized))
233 if (WARN_ON(dev_priv->gvt))
236 gvt = kzalloc(sizeof(struct intel_gvt), GFP_KERNEL);
240 gvt_dbg_core("init gvt device\n");
242 idr_init(&gvt->vgpu_idr);
244 mutex_init(&gvt->lock);
245 gvt->dev_priv = dev_priv;
247 init_device_info(gvt);
249 ret = intel_gvt_setup_mmio_info(gvt);
253 ret = intel_gvt_load_firmware(gvt);
255 goto out_clean_mmio_info;
257 ret = intel_gvt_init_irq(gvt);
259 goto out_free_firmware;
261 ret = intel_gvt_init_gtt(gvt);
265 ret = intel_gvt_init_opregion(gvt);
269 ret = intel_gvt_init_workload_scheduler(gvt);
271 goto out_clean_opregion;
273 ret = intel_gvt_init_sched_policy(gvt);
275 goto out_clean_workload_scheduler;
277 ret = intel_gvt_init_cmd_parser(gvt);
279 goto out_clean_sched_policy;
281 ret = init_service_thread(gvt);
283 goto out_clean_cmd_parser;
285 ret = intel_gvt_init_vgpu_types(gvt);
287 goto out_clean_thread;
289 ret = intel_gvt_hypervisor_host_init(&dev_priv->drm.pdev->dev, gvt,
292 gvt_err("failed to register gvt-g host device: %d\n", ret);
293 goto out_clean_types;
296 gvt_dbg_core("gvt device initialization is done\n");
301 intel_gvt_clean_vgpu_types(gvt);
303 clean_service_thread(gvt);
304 out_clean_cmd_parser:
305 intel_gvt_clean_cmd_parser(gvt);
306 out_clean_sched_policy:
307 intel_gvt_clean_sched_policy(gvt);
308 out_clean_workload_scheduler:
309 intel_gvt_clean_workload_scheduler(gvt);
311 intel_gvt_clean_opregion(gvt);
313 intel_gvt_clean_gtt(gvt);
315 intel_gvt_clean_irq(gvt);
317 intel_gvt_free_firmware(gvt);
319 intel_gvt_clean_mmio_info(gvt);
321 idr_destroy(&gvt->vgpu_idr);