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 
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 
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 
93 static void release_dev(struct device *dev)
94 {
95 	struct pci_dev *pdev = to_pci_dev(dev);
96 
97 	kfree(pdev);
98 }
99 
100 static int pm_domain_resume(struct device *dev)
101 {
102 	return pm_generic_runtime_resume(dev);
103 }
104 
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 
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 
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