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
36 #include "mock_request.h"
37 #include "mock_gem_device.h"
38 #include "mock_gtt.h"
39 #include "mock_uncore.h"
40 #include "mock_region.h"
41
42 #include "gem/selftests/mock_context.h"
43 #include "gem/selftests/mock_gem_object.h"
44
mock_device_flush(struct drm_i915_private * i915)45 void mock_device_flush(struct drm_i915_private *i915)
46 {
47 struct intel_gt *gt = &i915->gt;
48 struct intel_engine_cs *engine;
49 enum intel_engine_id id;
50
51 do {
52 for_each_engine(engine, gt, id)
53 mock_engine_flush(engine);
54 } while (intel_gt_retire_requests_timeout(gt, MAX_SCHEDULE_TIMEOUT));
55 }
56
mock_device_release(struct drm_device * dev)57 static void mock_device_release(struct drm_device *dev)
58 {
59 struct drm_i915_private *i915 = to_i915(dev);
60
61 if (!i915->do_release)
62 goto out;
63
64 mock_device_flush(i915);
65 intel_gt_driver_remove(&i915->gt);
66
67 i915_gem_driver_release__contexts(i915);
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_gt_driver_late_release(&i915->gt);
76 intel_memory_regions_driver_release(i915);
77
78 drm_mode_config_cleanup(&i915->drm);
79
80 out:
81 i915_params_free(&i915->params);
82 }
83
84 static struct drm_driver mock_driver = {
85 .name = "mock",
86 .driver_features = DRIVER_GEM,
87 .release = mock_device_release,
88
89 .gem_close_object = i915_gem_close_object,
90 .gem_free_object_unlocked = i915_gem_free_object,
91 };
92
release_dev(struct device * dev)93 static void release_dev(struct device *dev)
94 {
95 struct pci_dev *pdev = to_pci_dev(dev);
96
97 kfree(pdev);
98 }
99
pm_domain_resume(struct device * dev)100 static int pm_domain_resume(struct device *dev)
101 {
102 return pm_generic_runtime_resume(dev);
103 }
104
pm_domain_suspend(struct device * dev)105 static int pm_domain_suspend(struct device *dev)
106 {
107 return pm_generic_runtime_suspend(dev);
108 }
109
110 static struct dev_pm_domain pm_domain = {
111 .ops = {
112 .runtime_suspend = pm_domain_suspend,
113 .runtime_resume = pm_domain_resume,
114 },
115 };
116
mock_gem_device(void)117 struct drm_i915_private *mock_gem_device(void)
118 {
119 #if IS_ENABLED(CONFIG_IOMMU_API) && defined(CONFIG_INTEL_IOMMU)
120 static struct dev_iommu fake_iommu = { .priv = (void *)-1 };
121 #endif
122 struct drm_i915_private *i915;
123 struct pci_dev *pdev;
124
125 pdev = kzalloc(sizeof(*pdev), GFP_KERNEL);
126 if (!pdev)
127 return NULL;
128 device_initialize(&pdev->dev);
129 pdev->class = PCI_BASE_CLASS_DISPLAY << 16;
130 pdev->dev.release = release_dev;
131 dev_set_name(&pdev->dev, "mock");
132 dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
133
134 #if IS_ENABLED(CONFIG_IOMMU_API) && defined(CONFIG_INTEL_IOMMU)
135 /* HACK to disable iommu for the fake device; force identity mapping */
136 pdev->dev.iommu = &fake_iommu;
137 #endif
138 if (!devres_open_group(&pdev->dev, NULL, GFP_KERNEL)) {
139 put_device(&pdev->dev);
140 return NULL;
141 }
142
143 i915 = devm_drm_dev_alloc(&pdev->dev, &mock_driver,
144 struct drm_i915_private, drm);
145 if (IS_ERR(i915)) {
146 pr_err("Failed to allocate mock GEM device: err=%ld\n", PTR_ERR(i915));
147 devres_release_group(&pdev->dev, NULL);
148 put_device(&pdev->dev);
149
150 return NULL;
151 }
152
153 pci_set_drvdata(pdev, i915);
154 i915->drm.pdev = pdev;
155
156 dev_pm_domain_set(&pdev->dev, &pm_domain);
157 pm_runtime_enable(&pdev->dev);
158 pm_runtime_dont_use_autosuspend(&pdev->dev);
159 if (pm_runtime_enabled(&pdev->dev))
160 WARN_ON(pm_runtime_get_sync(&pdev->dev));
161
162
163 i915_params_copy(&i915->params, &i915_modparams);
164
165 intel_runtime_pm_init_early(&i915->runtime_pm);
166
167 /* Using the global GTT may ask questions about KMS users, so prepare */
168 drm_mode_config_init(&i915->drm);
169
170 mkwrite_device_info(i915)->gen = -1;
171
172 mkwrite_device_info(i915)->page_sizes =
173 I915_GTT_PAGE_SIZE_4K |
174 I915_GTT_PAGE_SIZE_64K |
175 I915_GTT_PAGE_SIZE_2M;
176
177 mkwrite_device_info(i915)->memory_regions = REGION_SMEM;
178 intel_memory_regions_hw_probe(i915);
179
180 mock_uncore_init(&i915->uncore, i915);
181
182 i915_gem_init__mm(i915);
183 intel_gt_init_early(&i915->gt, i915);
184 atomic_inc(&i915->gt.wakeref.count); /* disable; no hw support */
185 i915->gt.awake = -ENODEV;
186
187 i915->wq = alloc_ordered_workqueue("mock", 0);
188 if (!i915->wq)
189 goto err_drv;
190
191 mock_init_contexts(i915);
192
193 mock_init_ggtt(i915, &i915->ggtt);
194 i915->gt.vm = i915_vm_get(&i915->ggtt.vm);
195
196 mkwrite_device_info(i915)->platform_engine_mask = BIT(0);
197 i915->gt.info.engine_mask = BIT(0);
198
199 i915->gt.engine[RCS0] = mock_engine(i915, "mock", RCS0);
200 if (!i915->gt.engine[RCS0])
201 goto err_unlock;
202
203 if (mock_engine_init(i915->gt.engine[RCS0]))
204 goto err_context;
205
206 __clear_bit(I915_WEDGED, &i915->gt.reset.flags);
207 intel_engines_driver_register(i915);
208
209 i915->do_release = true;
210
211 return i915;
212
213 err_context:
214 intel_gt_driver_remove(&i915->gt);
215 err_unlock:
216 destroy_workqueue(i915->wq);
217 err_drv:
218 intel_gt_driver_late_release(&i915->gt);
219 intel_memory_regions_driver_release(i915);
220 drm_mode_config_cleanup(&i915->drm);
221 mock_destroy_device(i915);
222
223 return NULL;
224 }
225
mock_destroy_device(struct drm_i915_private * i915)226 void mock_destroy_device(struct drm_i915_private *i915)
227 {
228 struct device *dev = i915->drm.dev;
229
230 devres_release_group(dev, NULL);
231 put_device(dev);
232 }
233