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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
24#include "i915_drv.h"
25#include "i915_vgpu.h"
26#include "intel_gvt.h"
27#include "gem/i915_gem_dmabuf.h"
28#include "gt/intel_context.h"
29#include "gt/intel_ring.h"
30#include "gt/shmem_utils.h"
31
32/**
33 * DOC: Intel GVT-g host support
34 *
35 * Intel GVT-g is a graphics virtualization technology which shares the
36 * GPU among multiple virtual machines on a time-sharing basis. Each
37 * virtual machine is presented a virtual GPU (vGPU), which has equivalent
38 * features as the underlying physical GPU (pGPU), so i915 driver can run
39 * seamlessly in a virtual machine.
40 *
41 * To virtualize GPU resources GVT-g driver depends on hypervisor technology
42 * e.g KVM/VFIO/mdev, Xen, etc. to provide resource access trapping capability
43 * and be virtualized within GVT-g device module. More architectural design
44 * doc is available on https://01.org/group/2230/documentation-list.
45 */
46
47static LIST_HEAD(intel_gvt_devices);
48static const struct intel_vgpu_ops *intel_gvt_ops;
49static DEFINE_MUTEX(intel_gvt_mutex);
50
51static bool is_supported_device(struct drm_i915_private *dev_priv)
52{
53 if (IS_BROADWELL(dev_priv))
54 return true;
55 if (IS_SKYLAKE(dev_priv))
56 return true;
57 if (IS_KABYLAKE(dev_priv))
58 return true;
59 if (IS_BROXTON(dev_priv))
60 return true;
61 if (IS_COFFEELAKE(dev_priv))
62 return true;
63 if (IS_COMETLAKE(dev_priv))
64 return true;
65
66 return false;
67}
68
69static void free_initial_hw_state(struct drm_i915_private *dev_priv)
70{
71 struct i915_virtual_gpu *vgpu = &dev_priv->vgpu;
72
73 vfree(vgpu->initial_mmio);
74 vgpu->initial_mmio = NULL;
75
76 kfree(vgpu->initial_cfg_space);
77 vgpu->initial_cfg_space = NULL;
78}
79
80static void save_mmio(struct intel_gvt_mmio_table_iter *iter, u32 offset,
81 u32 size)
82{
83 struct drm_i915_private *dev_priv = iter->i915;
84 u32 *mmio, i;
85
86 for (i = offset; i < offset + size; i += 4) {
87 mmio = iter->data + i;
88 *mmio = intel_uncore_read_notrace(to_gt(dev_priv)->uncore,
89 _MMIO(i));
90 }
91}
92
93static int handle_mmio(struct intel_gvt_mmio_table_iter *iter,
94 u32 offset, u32 size)
95{
96 if (WARN_ON(!IS_ALIGNED(offset, 4)))
97 return -EINVAL;
98
99 save_mmio(iter, offset, size);
100 return 0;
101}
102
103static int save_initial_hw_state(struct drm_i915_private *dev_priv)
104{
105 struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev);
106 struct i915_virtual_gpu *vgpu = &dev_priv->vgpu;
107 struct intel_gvt_mmio_table_iter iter;
108 void *mem;
109 int i, ret;
110
111 mem = kzalloc(PCI_CFG_SPACE_EXP_SIZE, GFP_KERNEL);
112 if (!mem)
113 return -ENOMEM;
114
115 vgpu->initial_cfg_space = mem;
116
117 for (i = 0; i < PCI_CFG_SPACE_EXP_SIZE; i += 4)
118 pci_read_config_dword(pdev, i, mem + i);
119
120 mem = vzalloc(2 * SZ_1M);
121 if (!mem) {
122 ret = -ENOMEM;
123 goto err_mmio;
124 }
125
126 vgpu->initial_mmio = mem;
127
128 iter.i915 = dev_priv;
129 iter.data = vgpu->initial_mmio;
130 iter.handle_mmio_cb = handle_mmio;
131
132 ret = intel_gvt_iterate_mmio_table(&iter);
133 if (ret)
134 goto err_iterate;
135
136 return 0;
137
138err_iterate:
139 vfree(vgpu->initial_mmio);
140 vgpu->initial_mmio = NULL;
141err_mmio:
142 kfree(vgpu->initial_cfg_space);
143 vgpu->initial_cfg_space = NULL;
144
145 return ret;
146}
147
148static void intel_gvt_init_device(struct drm_i915_private *dev_priv)
149{
150 if (!dev_priv->params.enable_gvt) {
151 drm_dbg(&dev_priv->drm,
152 "GVT-g is disabled by kernel params\n");
153 return;
154 }
155
156 if (intel_vgpu_active(dev_priv)) {
157 drm_info(&dev_priv->drm, "GVT-g is disabled for guest\n");
158 return;
159 }
160
161 if (!is_supported_device(dev_priv)) {
162 drm_info(&dev_priv->drm,
163 "Unsupported device. GVT-g is disabled\n");
164 return;
165 }
166
167 if (intel_uc_wants_guc_submission(&to_gt(dev_priv)->uc)) {
168 drm_err(&dev_priv->drm,
169 "Graphics virtualization is not yet supported with GuC submission\n");
170 return;
171 }
172
173 if (save_initial_hw_state(dev_priv)) {
174 drm_dbg(&dev_priv->drm, "Failed to save initial HW state\n");
175 return;
176 }
177
178 if (intel_gvt_ops->init_device(dev_priv))
179 drm_dbg(&dev_priv->drm, "Fail to init GVT device\n");
180}
181
182static void intel_gvt_clean_device(struct drm_i915_private *dev_priv)
183{
184 if (dev_priv->gvt)
185 intel_gvt_ops->clean_device(dev_priv);
186 free_initial_hw_state(dev_priv);
187}
188
189int intel_gvt_set_ops(const struct intel_vgpu_ops *ops)
190{
191 struct drm_i915_private *dev_priv;
192
193 mutex_lock(&intel_gvt_mutex);
194 if (intel_gvt_ops) {
195 mutex_unlock(&intel_gvt_mutex);
196 return -EINVAL;
197 }
198 intel_gvt_ops = ops;
199
200 list_for_each_entry(dev_priv, &intel_gvt_devices, vgpu.entry)
201 intel_gvt_init_device(dev_priv);
202 mutex_unlock(&intel_gvt_mutex);
203
204 return 0;
205}
206EXPORT_SYMBOL_NS_GPL(intel_gvt_set_ops, I915_GVT);
207
208void intel_gvt_clear_ops(const struct intel_vgpu_ops *ops)
209{
210 struct drm_i915_private *dev_priv;
211
212 mutex_lock(&intel_gvt_mutex);
213 if (intel_gvt_ops != ops) {
214 mutex_unlock(&intel_gvt_mutex);
215 return;
216 }
217
218 list_for_each_entry(dev_priv, &intel_gvt_devices, vgpu.entry)
219 intel_gvt_clean_device(dev_priv);
220
221 intel_gvt_ops = NULL;
222 mutex_unlock(&intel_gvt_mutex);
223}
224EXPORT_SYMBOL_NS_GPL(intel_gvt_clear_ops, I915_GVT);
225
226/**
227 * intel_gvt_init - initialize GVT components
228 * @dev_priv: drm i915 private data
229 *
230 * This function is called at the initialization stage to create a GVT device.
231 *
232 * Returns:
233 * Zero on success, negative error code if failed.
234 *
235 */
236int intel_gvt_init(struct drm_i915_private *dev_priv)
237{
238 if (i915_inject_probe_failure(dev_priv))
239 return -ENODEV;
240
241 mutex_lock(&intel_gvt_mutex);
242 list_add_tail(&dev_priv->vgpu.entry, &intel_gvt_devices);
243 if (intel_gvt_ops)
244 intel_gvt_init_device(dev_priv);
245 mutex_unlock(&intel_gvt_mutex);
246
247 return 0;
248}
249
250/**
251 * intel_gvt_driver_remove - cleanup GVT components when i915 driver is
252 * unbinding
253 * @dev_priv: drm i915 private *
254 *
255 * This function is called at the i915 driver unloading stage, to shutdown
256 * GVT components and release the related resources.
257 */
258void intel_gvt_driver_remove(struct drm_i915_private *dev_priv)
259{
260 mutex_lock(&intel_gvt_mutex);
261 intel_gvt_clean_device(dev_priv);
262 list_del(&dev_priv->vgpu.entry);
263 mutex_unlock(&intel_gvt_mutex);
264}
265
266/**
267 * intel_gvt_resume - GVT resume routine wapper
268 *
269 * @dev_priv: drm i915 private *
270 *
271 * This function is called at the i915 driver resume stage to restore required
272 * HW status for GVT so that vGPU can continue running after resumed.
273 */
274void intel_gvt_resume(struct drm_i915_private *dev_priv)
275{
276 mutex_lock(&intel_gvt_mutex);
277 if (dev_priv->gvt)
278 intel_gvt_ops->pm_resume(dev_priv);
279 mutex_unlock(&intel_gvt_mutex);
280}
281
282/*
283 * Exported here so that the exports only get created when GVT support is
284 * actually enabled.
285 */
286EXPORT_SYMBOL_NS_GPL(i915_gem_object_alloc, I915_GVT);
287EXPORT_SYMBOL_NS_GPL(i915_gem_object_create_shmem, I915_GVT);
288EXPORT_SYMBOL_NS_GPL(i915_gem_object_init, I915_GVT);
289EXPORT_SYMBOL_NS_GPL(i915_gem_object_ggtt_pin_ww, I915_GVT);
290EXPORT_SYMBOL_NS_GPL(i915_gem_object_pin_map, I915_GVT);
291EXPORT_SYMBOL_NS_GPL(i915_gem_object_set_to_cpu_domain, I915_GVT);
292EXPORT_SYMBOL_NS_GPL(__i915_gem_object_flush_map, I915_GVT);
293EXPORT_SYMBOL_NS_GPL(__i915_gem_object_set_pages, I915_GVT);
294EXPORT_SYMBOL_NS_GPL(i915_gem_gtt_insert, I915_GVT);
295EXPORT_SYMBOL_NS_GPL(i915_gem_prime_export, I915_GVT);
296EXPORT_SYMBOL_NS_GPL(i915_gem_ww_ctx_init, I915_GVT);
297EXPORT_SYMBOL_NS_GPL(i915_gem_ww_ctx_backoff, I915_GVT);
298EXPORT_SYMBOL_NS_GPL(i915_gem_ww_ctx_fini, I915_GVT);
299EXPORT_SYMBOL_NS_GPL(i915_ppgtt_create, I915_GVT);
300EXPORT_SYMBOL_NS_GPL(i915_request_add, I915_GVT);
301EXPORT_SYMBOL_NS_GPL(i915_request_create, I915_GVT);
302EXPORT_SYMBOL_NS_GPL(i915_request_wait, I915_GVT);
303EXPORT_SYMBOL_NS_GPL(i915_reserve_fence, I915_GVT);
304EXPORT_SYMBOL_NS_GPL(i915_unreserve_fence, I915_GVT);
305EXPORT_SYMBOL_NS_GPL(i915_vm_release, I915_GVT);
306EXPORT_SYMBOL_NS_GPL(_i915_vma_move_to_active, I915_GVT);
307EXPORT_SYMBOL_NS_GPL(intel_context_create, I915_GVT);
308EXPORT_SYMBOL_NS_GPL(__intel_context_do_pin, I915_GVT);
309EXPORT_SYMBOL_NS_GPL(__intel_context_do_unpin, I915_GVT);
310EXPORT_SYMBOL_NS_GPL(intel_ring_begin, I915_GVT);
311EXPORT_SYMBOL_NS_GPL(intel_runtime_pm_get, I915_GVT);
312#if IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM)
313EXPORT_SYMBOL_NS_GPL(intel_runtime_pm_put, I915_GVT);
314#endif
315EXPORT_SYMBOL_NS_GPL(intel_runtime_pm_put_unchecked, I915_GVT);
316EXPORT_SYMBOL_NS_GPL(intel_uncore_forcewake_for_reg, I915_GVT);
317EXPORT_SYMBOL_NS_GPL(intel_uncore_forcewake_get, I915_GVT);
318EXPORT_SYMBOL_NS_GPL(intel_uncore_forcewake_put, I915_GVT);
319EXPORT_SYMBOL_NS_GPL(shmem_pin_map, I915_GVT);
320EXPORT_SYMBOL_NS_GPL(shmem_unpin_map, I915_GVT);
321EXPORT_SYMBOL_NS_GPL(__px_dma, I915_GVT);
322EXPORT_SYMBOL_NS_GPL(i915_fence_ops, I915_GVT);
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
24#include "i915_drv.h"
25#include "i915_vgpu.h"
26#include "intel_gvt.h"
27
28/**
29 * DOC: Intel GVT-g host support
30 *
31 * Intel GVT-g is a graphics virtualization technology which shares the
32 * GPU among multiple virtual machines on a time-sharing basis. Each
33 * virtual machine is presented a virtual GPU (vGPU), which has equivalent
34 * features as the underlying physical GPU (pGPU), so i915 driver can run
35 * seamlessly in a virtual machine.
36 *
37 * To virtualize GPU resources GVT-g driver depends on hypervisor technology
38 * e.g KVM/VFIO/mdev, Xen, etc. to provide resource access trapping capability
39 * and be virtualized within GVT-g device module. More architectural design
40 * doc is available on https://01.org/group/2230/documentation-list.
41 */
42
43static bool is_supported_device(struct drm_i915_private *dev_priv)
44{
45 if (IS_BROADWELL(dev_priv))
46 return true;
47 if (IS_SKYLAKE(dev_priv))
48 return true;
49 if (IS_KABYLAKE(dev_priv))
50 return true;
51 if (IS_BROXTON(dev_priv))
52 return true;
53 if (IS_COFFEELAKE(dev_priv))
54 return true;
55 if (IS_COMETLAKE(dev_priv))
56 return true;
57
58 return false;
59}
60
61/**
62 * intel_gvt_sanitize_options - sanitize GVT related options
63 * @dev_priv: drm i915 private data
64 *
65 * This function is called at the i915 options sanitize stage.
66 */
67void intel_gvt_sanitize_options(struct drm_i915_private *dev_priv)
68{
69 if (!dev_priv->params.enable_gvt)
70 return;
71
72 if (intel_vgpu_active(dev_priv)) {
73 drm_info(&dev_priv->drm, "GVT-g is disabled for guest\n");
74 goto bail;
75 }
76
77 if (!is_supported_device(dev_priv)) {
78 drm_info(&dev_priv->drm,
79 "Unsupported device. GVT-g is disabled\n");
80 goto bail;
81 }
82
83 return;
84bail:
85 dev_priv->params.enable_gvt = 0;
86}
87
88/**
89 * intel_gvt_init - initialize GVT components
90 * @dev_priv: drm i915 private data
91 *
92 * This function is called at the initialization stage to create a GVT device.
93 *
94 * Returns:
95 * Zero on success, negative error code if failed.
96 *
97 */
98int intel_gvt_init(struct drm_i915_private *dev_priv)
99{
100 int ret;
101
102 if (i915_inject_probe_failure(dev_priv))
103 return -ENODEV;
104
105 if (!dev_priv->params.enable_gvt) {
106 drm_dbg(&dev_priv->drm,
107 "GVT-g is disabled by kernel params\n");
108 return 0;
109 }
110
111 if (intel_uc_wants_guc_submission(&dev_priv->gt.uc)) {
112 drm_err(&dev_priv->drm,
113 "i915 GVT-g loading failed due to Graphics virtualization is not yet supported with GuC submission\n");
114 return -EIO;
115 }
116
117 ret = intel_gvt_init_device(dev_priv);
118 if (ret) {
119 drm_dbg(&dev_priv->drm, "Fail to init GVT device\n");
120 goto bail;
121 }
122
123 return 0;
124
125bail:
126 dev_priv->params.enable_gvt = 0;
127 return 0;
128}
129
130static inline bool intel_gvt_active(struct drm_i915_private *dev_priv)
131{
132 return dev_priv->gvt;
133}
134
135/**
136 * intel_gvt_driver_remove - cleanup GVT components when i915 driver is
137 * unbinding
138 * @dev_priv: drm i915 private *
139 *
140 * This function is called at the i915 driver unloading stage, to shutdown
141 * GVT components and release the related resources.
142 */
143void intel_gvt_driver_remove(struct drm_i915_private *dev_priv)
144{
145 if (!intel_gvt_active(dev_priv))
146 return;
147
148 intel_gvt_clean_device(dev_priv);
149}