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 "gt/intel_gt.h"
32 #include "gt/intel_gt_requests.h"
33 #include "gt/mock_engine.h"
34 #include "intel_memory_region.h"
35 #include "intel_region_ttm.h"
36
37 #include "mock_request.h"
38 #include "mock_gem_device.h"
39 #include "mock_gtt.h"
40 #include "mock_uncore.h"
41 #include "mock_region.h"
42
43 #include "gem/selftests/mock_context.h"
44 #include "gem/selftests/mock_gem_object.h"
45
mock_device_flush(struct drm_i915_private * i915)46 void mock_device_flush(struct drm_i915_private *i915)
47 {
48 struct intel_gt *gt = to_gt(i915);
49 struct intel_engine_cs *engine;
50 enum intel_engine_id id;
51
52 do {
53 for_each_engine(engine, gt, id)
54 mock_engine_flush(engine);
55 } while (intel_gt_retire_requests_timeout(gt, MAX_SCHEDULE_TIMEOUT,
56 NULL));
57 }
58
mock_device_release(struct drm_device * dev)59 static void mock_device_release(struct drm_device *dev)
60 {
61 struct drm_i915_private *i915 = to_i915(dev);
62
63 if (!i915->do_release)
64 goto out;
65
66 mock_device_flush(i915);
67 intel_gt_driver_remove(to_gt(i915));
68
69 i915_gem_drain_workqueue(i915);
70
71 mock_fini_ggtt(to_gt(i915)->ggtt);
72 destroy_workqueue(i915->unordered_wq);
73 destroy_workqueue(i915->wq);
74
75 intel_region_ttm_device_fini(i915);
76 intel_gt_driver_late_release_all(i915);
77 intel_memory_regions_driver_release(i915);
78
79 drm_mode_config_cleanup(&i915->drm);
80
81 out:
82 i915_params_free(&i915->params);
83 }
84
85 static const struct drm_driver mock_driver = {
86 .name = "mock",
87 .driver_features = DRIVER_GEM,
88 .release = mock_device_release,
89 };
90
release_dev(struct device * dev)91 static void release_dev(struct device *dev)
92 {
93 struct pci_dev *pdev = to_pci_dev(dev);
94
95 kfree(pdev);
96 }
97
pm_domain_resume(struct device * dev)98 static int pm_domain_resume(struct device *dev)
99 {
100 return pm_generic_runtime_resume(dev);
101 }
102
pm_domain_suspend(struct device * dev)103 static int pm_domain_suspend(struct device *dev)
104 {
105 return pm_generic_runtime_suspend(dev);
106 }
107
108 static struct dev_pm_domain pm_domain = {
109 .ops = {
110 .runtime_suspend = pm_domain_suspend,
111 .runtime_resume = pm_domain_resume,
112 },
113 };
114
mock_gt_probe(struct drm_i915_private * i915)115 static void mock_gt_probe(struct drm_i915_private *i915)
116 {
117 i915->gt[0]->name = "Mock GT";
118 }
119
120 static const struct intel_device_info mock_info = {
121 .__runtime.graphics.ip.ver = -1,
122 .__runtime.page_sizes = (I915_GTT_PAGE_SIZE_4K |
123 I915_GTT_PAGE_SIZE_64K |
124 I915_GTT_PAGE_SIZE_2M),
125 .memory_regions = BIT(INTEL_REGION_SMEM),
126 .platform_engine_mask = BIT(0),
127
128 /* simply use legacy cache level for mock device */
129 .max_pat_index = 3,
130 .cachelevel_to_pat = {
131 [I915_CACHE_NONE] = 0,
132 [I915_CACHE_LLC] = 1,
133 [I915_CACHE_L3_LLC] = 2,
134 [I915_CACHE_WT] = 3,
135 },
136 };
137
mock_gem_device(void)138 struct drm_i915_private *mock_gem_device(void)
139 {
140 #if IS_ENABLED(CONFIG_IOMMU_API) && defined(CONFIG_INTEL_IOMMU)
141 static struct dev_iommu fake_iommu = { .priv = (void *)-1 };
142 #endif
143 struct drm_i915_private *i915;
144 struct pci_dev *pdev;
145 int ret;
146
147 pdev = kzalloc(sizeof(*pdev), GFP_KERNEL);
148 if (!pdev)
149 return NULL;
150 device_initialize(&pdev->dev);
151 pdev->class = PCI_BASE_CLASS_DISPLAY << 16;
152 pdev->dev.release = release_dev;
153 dev_set_name(&pdev->dev, "mock");
154 dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
155
156 #if IS_ENABLED(CONFIG_IOMMU_API) && defined(CONFIG_INTEL_IOMMU)
157 /* HACK to disable iommu for the fake device; force identity mapping */
158 pdev->dev.iommu = &fake_iommu;
159 #endif
160 if (!devres_open_group(&pdev->dev, NULL, GFP_KERNEL)) {
161 put_device(&pdev->dev);
162 return NULL;
163 }
164
165 i915 = devm_drm_dev_alloc(&pdev->dev, &mock_driver,
166 struct drm_i915_private, drm);
167 if (IS_ERR(i915)) {
168 pr_err("Failed to allocate mock GEM device: err=%ld\n", PTR_ERR(i915));
169 devres_release_group(&pdev->dev, NULL);
170 put_device(&pdev->dev);
171
172 return NULL;
173 }
174
175 pci_set_drvdata(pdev, &i915->drm);
176
177 /* Device parameters start as a copy of module parameters. */
178 i915_params_copy(&i915->params, &i915_modparams);
179
180 /* Set up device info and initial runtime info. */
181 intel_device_info_driver_create(i915, pdev->device, &mock_info);
182
183 intel_display_device_probe(i915);
184
185 dev_pm_domain_set(&pdev->dev, &pm_domain);
186 pm_runtime_enable(&pdev->dev);
187 pm_runtime_dont_use_autosuspend(&pdev->dev);
188 if (pm_runtime_enabled(&pdev->dev))
189 WARN_ON(pm_runtime_get_sync(&pdev->dev));
190
191 intel_runtime_pm_init_early(&i915->runtime_pm);
192 /* wakeref tracking has significant overhead */
193 i915->runtime_pm.no_wakeref_tracking = true;
194
195 /* Using the global GTT may ask questions about KMS users, so prepare */
196 drm_mode_config_init(&i915->drm);
197
198 intel_memory_regions_hw_probe(i915);
199
200 spin_lock_init(&i915->gpu_error.lock);
201
202 i915_gem_init__mm(i915);
203 intel_root_gt_init_early(i915);
204 mock_uncore_init(&i915->uncore, i915);
205 atomic_inc(&to_gt(i915)->wakeref.count); /* disable; no hw support */
206 to_gt(i915)->awake = -ENODEV;
207 mock_gt_probe(i915);
208
209 ret = intel_region_ttm_device_init(i915);
210 if (ret)
211 goto err_ttm;
212
213 i915->wq = alloc_ordered_workqueue("mock", 0);
214 if (!i915->wq)
215 goto err_drv;
216
217 i915->unordered_wq = alloc_workqueue("mock-unordered", 0, 0);
218 if (!i915->unordered_wq)
219 goto err_wq;
220
221 mock_init_contexts(i915);
222
223 /* allocate the ggtt */
224 ret = intel_gt_assign_ggtt(to_gt(i915));
225 if (ret)
226 goto err_unlock;
227
228 mock_init_ggtt(to_gt(i915));
229 to_gt(i915)->vm = i915_vm_get(&to_gt(i915)->ggtt->vm);
230
231 to_gt(i915)->info.engine_mask = BIT(0);
232
233 to_gt(i915)->engine[RCS0] = mock_engine(i915, "mock", RCS0);
234 if (!to_gt(i915)->engine[RCS0])
235 goto err_unlock;
236
237 if (mock_engine_init(to_gt(i915)->engine[RCS0]))
238 goto err_context;
239
240 __clear_bit(I915_WEDGED, &to_gt(i915)->reset.flags);
241 intel_engines_driver_register(i915);
242
243 i915->do_release = true;
244 ida_init(&i915->selftest.mock_region_instances);
245
246 return i915;
247
248 err_context:
249 intel_gt_driver_remove(to_gt(i915));
250 err_unlock:
251 destroy_workqueue(i915->unordered_wq);
252 err_wq:
253 destroy_workqueue(i915->wq);
254 err_drv:
255 intel_region_ttm_device_fini(i915);
256 err_ttm:
257 intel_gt_driver_late_release_all(i915);
258 intel_memory_regions_driver_release(i915);
259 drm_mode_config_cleanup(&i915->drm);
260 mock_destroy_device(i915);
261
262 return NULL;
263 }
264
mock_destroy_device(struct drm_i915_private * i915)265 void mock_destroy_device(struct drm_i915_private *i915)
266 {
267 struct device *dev = i915->drm.dev;
268
269 devres_release_group(dev, NULL);
270 put_device(dev);
271 }
272