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 = &i915->gt;
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(&i915->gt);
68
69 i915_gem_drain_workqueue(i915);
70 i915_gem_drain_freed_objects(i915);
71
72 mock_fini_ggtt(&i915->ggtt);
73 destroy_workqueue(i915->wq);
74
75 intel_region_ttm_device_fini(i915);
76 intel_gt_driver_late_release(&i915->gt);
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_gem_device(void)115 struct drm_i915_private *mock_gem_device(void)
116 {
117 #if IS_ENABLED(CONFIG_IOMMU_API) && defined(CONFIG_INTEL_IOMMU)
118 static struct dev_iommu fake_iommu = { .priv = (void *)-1 };
119 #endif
120 struct drm_i915_private *i915;
121 struct pci_dev *pdev;
122 int ret;
123
124 pdev = kzalloc(sizeof(*pdev), GFP_KERNEL);
125 if (!pdev)
126 return NULL;
127 device_initialize(&pdev->dev);
128 pdev->class = PCI_BASE_CLASS_DISPLAY << 16;
129 pdev->dev.release = release_dev;
130 dev_set_name(&pdev->dev, "mock");
131 dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
132
133 #if IS_ENABLED(CONFIG_IOMMU_API) && defined(CONFIG_INTEL_IOMMU)
134 /* HACK to disable iommu for the fake device; force identity mapping */
135 pdev->dev.iommu = &fake_iommu;
136 #endif
137 if (!devres_open_group(&pdev->dev, NULL, GFP_KERNEL)) {
138 put_device(&pdev->dev);
139 return NULL;
140 }
141
142 i915 = devm_drm_dev_alloc(&pdev->dev, &mock_driver,
143 struct drm_i915_private, drm);
144 if (IS_ERR(i915)) {
145 pr_err("Failed to allocate mock GEM device: err=%ld\n", PTR_ERR(i915));
146 devres_release_group(&pdev->dev, NULL);
147 put_device(&pdev->dev);
148
149 return NULL;
150 }
151
152 pci_set_drvdata(pdev, i915);
153
154 dev_pm_domain_set(&pdev->dev, &pm_domain);
155 pm_runtime_enable(&pdev->dev);
156 pm_runtime_dont_use_autosuspend(&pdev->dev);
157 if (pm_runtime_enabled(&pdev->dev))
158 WARN_ON(pm_runtime_get_sync(&pdev->dev));
159
160
161 i915_params_copy(&i915->params, &i915_modparams);
162
163 intel_runtime_pm_init_early(&i915->runtime_pm);
164
165 /* Using the global GTT may ask questions about KMS users, so prepare */
166 drm_mode_config_init(&i915->drm);
167
168 mkwrite_device_info(i915)->graphics_ver = -1;
169
170 mkwrite_device_info(i915)->page_sizes =
171 I915_GTT_PAGE_SIZE_4K |
172 I915_GTT_PAGE_SIZE_64K |
173 I915_GTT_PAGE_SIZE_2M;
174
175 mkwrite_device_info(i915)->memory_regions = REGION_SMEM;
176 intel_memory_regions_hw_probe(i915);
177
178 mock_uncore_init(&i915->uncore, i915);
179
180 i915_gem_init__mm(i915);
181 intel_gt_init_early(&i915->gt, i915);
182 atomic_inc(&i915->gt.wakeref.count); /* disable; no hw support */
183 i915->gt.awake = -ENODEV;
184
185 ret = intel_region_ttm_device_init(i915);
186 if (ret)
187 goto err_ttm;
188
189 i915->wq = alloc_ordered_workqueue("mock", 0);
190 if (!i915->wq)
191 goto err_drv;
192
193 mock_init_contexts(i915);
194
195 mock_init_ggtt(i915, &i915->ggtt);
196 i915->gt.vm = i915_vm_get(&i915->ggtt.vm);
197
198 mkwrite_device_info(i915)->platform_engine_mask = BIT(0);
199 i915->gt.info.engine_mask = BIT(0);
200
201 i915->gt.engine[RCS0] = mock_engine(i915, "mock", RCS0);
202 if (!i915->gt.engine[RCS0])
203 goto err_unlock;
204
205 if (mock_engine_init(i915->gt.engine[RCS0]))
206 goto err_context;
207
208 __clear_bit(I915_WEDGED, &i915->gt.reset.flags);
209 intel_engines_driver_register(i915);
210
211 i915->do_release = true;
212 ida_init(&i915->selftest.mock_region_instances);
213
214 return i915;
215
216 err_context:
217 intel_gt_driver_remove(&i915->gt);
218 err_unlock:
219 destroy_workqueue(i915->wq);
220 err_drv:
221 intel_region_ttm_device_fini(i915);
222 err_ttm:
223 intel_gt_driver_late_release(&i915->gt);
224 intel_memory_regions_driver_release(i915);
225 drm_mode_config_cleanup(&i915->drm);
226 mock_destroy_device(i915);
227
228 return NULL;
229 }
230
mock_destroy_device(struct drm_i915_private * i915)231 void mock_destroy_device(struct drm_i915_private *i915)
232 {
233 struct device *dev = i915->drm.dev;
234
235 devres_release_group(dev, NULL);
236 put_device(dev);
237 }
238