1 /*
2 * Copyright © 2016 Intel Corporation
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
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21 * IN THE SOFTWARE.
22 *
23 */
24
25 #include <linux/pm_domain.h>
26 #include <linux/pm_runtime.h>
27 #include <linux/iommu.h>
28
29 #include <drm/drm_managed.h>
30
31 #include "display/intel_display_device.h"
32
33 #include "gt/intel_gt.h"
34 #include "gt/intel_gt_requests.h"
35 #include "gt/mock_engine.h"
36 #include "i915_driver.h"
37 #include "intel_memory_region.h"
38 #include "intel_region_ttm.h"
39
40 #include "mock_request.h"
41 #include "mock_gem_device.h"
42 #include "mock_gtt.h"
43 #include "mock_uncore.h"
44 #include "mock_region.h"
45
46 #include "gem/selftests/mock_context.h"
47 #include "gem/selftests/mock_gem_object.h"
48
mock_device_flush(struct drm_i915_private * i915)49 void mock_device_flush(struct drm_i915_private *i915)
50 {
51 struct intel_gt *gt = to_gt(i915);
52 struct intel_engine_cs *engine;
53 enum intel_engine_id id;
54
55 do {
56 for_each_engine(engine, gt, id)
57 mock_engine_flush(engine);
58 } while (intel_gt_retire_requests_timeout(gt, MAX_SCHEDULE_TIMEOUT,
59 NULL));
60 }
61
mock_device_release(struct drm_device * dev)62 static void mock_device_release(struct drm_device *dev)
63 {
64 struct drm_i915_private *i915 = to_i915(dev);
65
66 if (!i915->do_release)
67 goto out;
68
69 mock_device_flush(i915);
70 intel_gt_driver_remove(to_gt(i915));
71
72 i915_gem_drain_workqueue(i915);
73
74 mock_fini_ggtt(to_gt(i915)->ggtt);
75 destroy_workqueue(i915->unordered_wq);
76 destroy_workqueue(i915->wq);
77
78 intel_region_ttm_device_fini(i915);
79 intel_gt_driver_late_release_all(i915);
80 intel_memory_regions_driver_release(i915);
81
82 drm_mode_config_cleanup(&i915->drm);
83
84 out:
85 i915_params_free(&i915->params);
86 }
87
88 static const struct drm_driver mock_driver = {
89 .name = "mock",
90 .driver_features = DRIVER_GEM,
91 .release = mock_device_release,
92 };
93
release_dev(struct device * dev)94 static void release_dev(struct device *dev)
95 {
96 struct pci_dev *pdev = to_pci_dev(dev);
97
98 kfree(pdev);
99 }
100
pm_domain_resume(struct device * dev)101 static int pm_domain_resume(struct device *dev)
102 {
103 return pm_generic_runtime_resume(dev);
104 }
105
pm_domain_suspend(struct device * dev)106 static int pm_domain_suspend(struct device *dev)
107 {
108 return pm_generic_runtime_suspend(dev);
109 }
110
111 static struct dev_pm_domain pm_domain = {
112 .ops = {
113 .runtime_suspend = pm_domain_suspend,
114 .runtime_resume = pm_domain_resume,
115 },
116 };
117
mock_gt_probe(struct drm_i915_private * i915)118 static void mock_gt_probe(struct drm_i915_private *i915)
119 {
120 i915->gt[0]->name = "Mock GT";
121 }
122
123 static const struct intel_device_info mock_info = {
124 .__runtime.graphics.ip.ver = -1,
125 .__runtime.page_sizes = (I915_GTT_PAGE_SIZE_4K |
126 I915_GTT_PAGE_SIZE_64K |
127 I915_GTT_PAGE_SIZE_2M),
128 .memory_regions = BIT(INTEL_REGION_SMEM),
129 .platform_engine_mask = BIT(0),
130
131 /* simply use legacy cache level for mock device */
132 .max_pat_index = 3,
133 .cachelevel_to_pat = {
134 [I915_CACHE_NONE] = 0,
135 [I915_CACHE_LLC] = 1,
136 [I915_CACHE_L3_LLC] = 2,
137 [I915_CACHE_WT] = 3,
138 },
139 };
140
mock_gem_device(void)141 struct drm_i915_private *mock_gem_device(void)
142 {
143 #if IS_ENABLED(CONFIG_IOMMU_API) && IS_ENABLED(CONFIG_INTEL_IOMMU)
144 static struct dev_iommu fake_iommu = { .priv = (void *)-1 };
145 #endif
146 struct drm_i915_private *i915;
147 struct intel_display *display;
148 struct pci_dev *pdev;
149 int ret;
150
151 pdev = kzalloc_obj(*pdev);
152 if (!pdev)
153 return NULL;
154 device_initialize(&pdev->dev);
155 pdev->class = PCI_BASE_CLASS_DISPLAY << 16;
156 pdev->dev.release = release_dev;
157 dev_set_name(&pdev->dev, "mock");
158 dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
159
160 #if IS_ENABLED(CONFIG_IOMMU_API) && IS_ENABLED(CONFIG_INTEL_IOMMU)
161 /* HACK to disable iommu for the fake device; force identity mapping */
162 pdev->dev.iommu = &fake_iommu;
163 #endif
164 if (!devres_open_group(&pdev->dev, NULL, GFP_KERNEL)) {
165 put_device(&pdev->dev);
166 return NULL;
167 }
168
169 i915 = devm_drm_dev_alloc(&pdev->dev, &mock_driver,
170 struct drm_i915_private, drm);
171 if (IS_ERR(i915)) {
172 pr_err("Failed to allocate mock GEM device: err=%ld\n", PTR_ERR(i915));
173 devres_release_group(&pdev->dev, NULL);
174 put_device(&pdev->dev);
175
176 return NULL;
177 }
178
179 pci_set_drvdata(pdev, &i915->drm);
180
181 /* Device parameters start as a copy of module parameters. */
182 i915_params_copy(&i915->params, &i915_modparams);
183
184 /* Set up device info and initial runtime info. */
185 intel_device_info_driver_create(i915, pdev->device, &mock_info);
186
187 /* FIXME: Can we run selftests using a mock device without display? */
188 display = intel_display_device_probe(pdev, i915_driver_parent_interface());
189 if (IS_ERR(display))
190 goto err_device;
191
192 i915->display = display;
193
194 dev_pm_domain_set(&pdev->dev, &pm_domain);
195 pm_runtime_enable(&pdev->dev);
196 pm_runtime_dont_use_autosuspend(&pdev->dev);
197 if (pm_runtime_enabled(&pdev->dev))
198 WARN_ON(pm_runtime_get_sync(&pdev->dev));
199
200 intel_runtime_pm_init_early(&i915->runtime_pm);
201 /* wakeref tracking has significant overhead */
202 i915->runtime_pm.no_wakeref_tracking = true;
203
204 /* Using the global GTT may ask questions about KMS users, so prepare */
205 drm_mode_config_init(&i915->drm);
206
207 intel_memory_regions_hw_probe(i915);
208
209 spin_lock_init(&i915->gpu_error.lock);
210
211 i915_gem_init__mm(i915);
212 intel_root_gt_init_early(i915);
213 mock_uncore_init(&i915->uncore, i915);
214 atomic_inc(&to_gt(i915)->wakeref.count); /* disable; no hw support */
215 to_gt(i915)->awake = INTEL_WAKEREF_MOCK_GT;
216 mock_gt_probe(i915);
217
218 ret = intel_region_ttm_device_init(i915);
219 if (ret)
220 goto err_ttm;
221
222 i915->wq = alloc_ordered_workqueue("mock", 0);
223 if (!i915->wq)
224 goto err_drv;
225
226 i915->unordered_wq = alloc_workqueue("mock-unordered", 0, 0);
227 if (!i915->unordered_wq)
228 goto err_wq;
229
230 mock_init_contexts(i915);
231
232 /* allocate the ggtt */
233 ret = intel_gt_assign_ggtt(to_gt(i915));
234 if (ret)
235 goto err_unlock;
236
237 mock_init_ggtt(to_gt(i915));
238 to_gt(i915)->vm = i915_vm_get(&to_gt(i915)->ggtt->vm);
239
240 to_gt(i915)->info.engine_mask = BIT(0);
241
242 to_gt(i915)->engine[RCS0] = mock_engine(i915, "mock", RCS0);
243 if (!to_gt(i915)->engine[RCS0])
244 goto err_unlock;
245
246 if (mock_engine_init(to_gt(i915)->engine[RCS0]))
247 goto err_context;
248
249 __clear_bit(I915_WEDGED, &to_gt(i915)->reset.flags);
250 intel_engines_driver_register(i915);
251
252 i915->do_release = true;
253 ida_init(&i915->selftest.mock_region_instances);
254
255 return i915;
256
257 err_context:
258 intel_gt_driver_remove(to_gt(i915));
259 err_unlock:
260 destroy_workqueue(i915->unordered_wq);
261 err_wq:
262 destroy_workqueue(i915->wq);
263 err_drv:
264 intel_region_ttm_device_fini(i915);
265 err_ttm:
266 intel_gt_driver_late_release_all(i915);
267 intel_memory_regions_driver_release(i915);
268 drm_mode_config_cleanup(&i915->drm);
269 err_device:
270 mock_destroy_device(i915);
271
272 return NULL;
273 }
274
mock_destroy_device(struct drm_i915_private * i915)275 void mock_destroy_device(struct drm_i915_private *i915)
276 {
277 struct device *dev = i915->drm.dev;
278
279 intel_display_device_remove(i915->display);
280
281 devres_release_group(dev, NULL);
282 put_device(dev);
283 }
284