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 	i915_gem_drain_freed_objects(i915);
71 
72 	mock_fini_ggtt(to_gt(i915)->ggtt);
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] = &i915->gt0;
118 	i915->gt[0]->name = "Mock GT";
119 }
120 
mock_gem_device(void)121 struct drm_i915_private *mock_gem_device(void)
122 {
123 #if IS_ENABLED(CONFIG_IOMMU_API) && defined(CONFIG_INTEL_IOMMU)
124 	static struct dev_iommu fake_iommu = { .priv = (void *)-1 };
125 #endif
126 	struct drm_i915_private *i915;
127 	struct pci_dev *pdev;
128 	int ret;
129 
130 	pdev = kzalloc(sizeof(*pdev), GFP_KERNEL);
131 	if (!pdev)
132 		return NULL;
133 	device_initialize(&pdev->dev);
134 	pdev->class = PCI_BASE_CLASS_DISPLAY << 16;
135 	pdev->dev.release = release_dev;
136 	dev_set_name(&pdev->dev, "mock");
137 	dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
138 
139 #if IS_ENABLED(CONFIG_IOMMU_API) && defined(CONFIG_INTEL_IOMMU)
140 	/* HACK to disable iommu for the fake device; force identity mapping */
141 	pdev->dev.iommu = &fake_iommu;
142 #endif
143 	if (!devres_open_group(&pdev->dev, NULL, GFP_KERNEL)) {
144 		put_device(&pdev->dev);
145 		return NULL;
146 	}
147 
148 	i915 = devm_drm_dev_alloc(&pdev->dev, &mock_driver,
149 				  struct drm_i915_private, drm);
150 	if (IS_ERR(i915)) {
151 		pr_err("Failed to allocate mock GEM device: err=%ld\n", PTR_ERR(i915));
152 		devres_release_group(&pdev->dev, NULL);
153 		put_device(&pdev->dev);
154 
155 		return NULL;
156 	}
157 
158 	pci_set_drvdata(pdev, i915);
159 
160 	dev_pm_domain_set(&pdev->dev, &pm_domain);
161 	pm_runtime_enable(&pdev->dev);
162 	pm_runtime_dont_use_autosuspend(&pdev->dev);
163 	if (pm_runtime_enabled(&pdev->dev))
164 		WARN_ON(pm_runtime_get_sync(&pdev->dev));
165 
166 
167 	i915_params_copy(&i915->params, &i915_modparams);
168 
169 	intel_runtime_pm_init_early(&i915->runtime_pm);
170 	/* wakeref tracking has significant overhead */
171 	i915->runtime_pm.no_wakeref_tracking = true;
172 
173 	/* Using the global GTT may ask questions about KMS users, so prepare */
174 	drm_mode_config_init(&i915->drm);
175 
176 	RUNTIME_INFO(i915)->graphics.ip.ver = -1;
177 
178 	RUNTIME_INFO(i915)->page_sizes =
179 		I915_GTT_PAGE_SIZE_4K |
180 		I915_GTT_PAGE_SIZE_64K |
181 		I915_GTT_PAGE_SIZE_2M;
182 
183 	RUNTIME_INFO(i915)->memory_regions = REGION_SMEM;
184 	intel_memory_regions_hw_probe(i915);
185 
186 	spin_lock_init(&i915->gpu_error.lock);
187 
188 	i915_gem_init__mm(i915);
189 	intel_root_gt_init_early(i915);
190 	mock_uncore_init(&i915->uncore, i915);
191 	atomic_inc(&to_gt(i915)->wakeref.count); /* disable; no hw support */
192 	to_gt(i915)->awake = -ENODEV;
193 	mock_gt_probe(i915);
194 
195 	ret = intel_region_ttm_device_init(i915);
196 	if (ret)
197 		goto err_ttm;
198 
199 	i915->wq = alloc_ordered_workqueue("mock", 0);
200 	if (!i915->wq)
201 		goto err_drv;
202 
203 	mock_init_contexts(i915);
204 
205 	/* allocate the ggtt */
206 	ret = intel_gt_assign_ggtt(to_gt(i915));
207 	if (ret)
208 		goto err_unlock;
209 
210 	mock_init_ggtt(to_gt(i915));
211 	to_gt(i915)->vm = i915_vm_get(&to_gt(i915)->ggtt->vm);
212 
213 	RUNTIME_INFO(i915)->platform_engine_mask = BIT(0);
214 	to_gt(i915)->info.engine_mask = BIT(0);
215 
216 	to_gt(i915)->engine[RCS0] = mock_engine(i915, "mock", RCS0);
217 	if (!to_gt(i915)->engine[RCS0])
218 		goto err_unlock;
219 
220 	if (mock_engine_init(to_gt(i915)->engine[RCS0]))
221 		goto err_context;
222 
223 	__clear_bit(I915_WEDGED, &to_gt(i915)->reset.flags);
224 	intel_engines_driver_register(i915);
225 
226 	i915->do_release = true;
227 	ida_init(&i915->selftest.mock_region_instances);
228 
229 	return i915;
230 
231 err_context:
232 	intel_gt_driver_remove(to_gt(i915));
233 err_unlock:
234 	destroy_workqueue(i915->wq);
235 err_drv:
236 	intel_region_ttm_device_fini(i915);
237 err_ttm:
238 	intel_gt_driver_late_release_all(i915);
239 	intel_memory_regions_driver_release(i915);
240 	drm_mode_config_cleanup(&i915->drm);
241 	mock_destroy_device(i915);
242 
243 	return NULL;
244 }
245 
mock_destroy_device(struct drm_i915_private * i915)246 void mock_destroy_device(struct drm_i915_private *i915)
247 {
248 	struct device *dev = i915->drm.dev;
249 
250 	devres_release_group(dev, NULL);
251 	put_device(dev);
252 }
253