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
 46void 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
 59static 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->wq);
 73
 74	intel_region_ttm_device_fini(i915);
 75	intel_gt_driver_late_release_all(i915);
 76	intel_memory_regions_driver_release(i915);
 77
 78	drm_mode_config_cleanup(&i915->drm);
 79
 80out:
 81	i915_params_free(&i915->params);
 82}
 83
 84static const struct drm_driver mock_driver = {
 85	.name = "mock",
 86	.driver_features = DRIVER_GEM,
 87	.release = mock_device_release,
 88};
 89
 90static void release_dev(struct device *dev)
 91{
 92	struct pci_dev *pdev = to_pci_dev(dev);
 93
 94	kfree(pdev);
 95}
 96
 97static int pm_domain_resume(struct device *dev)
 98{
 99	return pm_generic_runtime_resume(dev);
100}
101
102static int pm_domain_suspend(struct device *dev)
103{
104	return pm_generic_runtime_suspend(dev);
105}
106
107static struct dev_pm_domain pm_domain = {
108	.ops = {
109		.runtime_suspend = pm_domain_suspend,
110		.runtime_resume = pm_domain_resume,
111	},
112};
113
114static void mock_gt_probe(struct drm_i915_private *i915)
115{
116	i915->gt[0] = &i915->gt0;
117	i915->gt[0]->name = "Mock GT";
118}
119
120struct drm_i915_private *mock_gem_device(void)
121{
122#if IS_ENABLED(CONFIG_IOMMU_API) && defined(CONFIG_INTEL_IOMMU)
123	static struct dev_iommu fake_iommu = { .priv = (void *)-1 };
124#endif
125	struct drm_i915_private *i915;
126	struct pci_dev *pdev;
127	int ret;
128
129	pdev = kzalloc(sizeof(*pdev), GFP_KERNEL);
130	if (!pdev)
131		return NULL;
132	device_initialize(&pdev->dev);
133	pdev->class = PCI_BASE_CLASS_DISPLAY << 16;
134	pdev->dev.release = release_dev;
135	dev_set_name(&pdev->dev, "mock");
136	dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
137
138#if IS_ENABLED(CONFIG_IOMMU_API) && defined(CONFIG_INTEL_IOMMU)
139	/* HACK to disable iommu for the fake device; force identity mapping */
140	pdev->dev.iommu = &fake_iommu;
141#endif
142	if (!devres_open_group(&pdev->dev, NULL, GFP_KERNEL)) {
143		put_device(&pdev->dev);
144		return NULL;
145	}
146
147	i915 = devm_drm_dev_alloc(&pdev->dev, &mock_driver,
148				  struct drm_i915_private, drm);
149	if (IS_ERR(i915)) {
150		pr_err("Failed to allocate mock GEM device: err=%ld\n", PTR_ERR(i915));
151		devres_release_group(&pdev->dev, NULL);
152		put_device(&pdev->dev);
153
154		return NULL;
155	}
156
157	pci_set_drvdata(pdev, i915);
158
159	dev_pm_domain_set(&pdev->dev, &pm_domain);
160	pm_runtime_enable(&pdev->dev);
161	pm_runtime_dont_use_autosuspend(&pdev->dev);
162	if (pm_runtime_enabled(&pdev->dev))
163		WARN_ON(pm_runtime_get_sync(&pdev->dev));
164
165
166	i915_params_copy(&i915->params, &i915_modparams);
167
168	intel_runtime_pm_init_early(&i915->runtime_pm);
169	/* wakeref tracking has significant overhead */
170	i915->runtime_pm.no_wakeref_tracking = true;
171
172	/* Using the global GTT may ask questions about KMS users, so prepare */
173	drm_mode_config_init(&i915->drm);
174
175	RUNTIME_INFO(i915)->graphics.ip.ver = -1;
176
177	RUNTIME_INFO(i915)->page_sizes =
178		I915_GTT_PAGE_SIZE_4K |
179		I915_GTT_PAGE_SIZE_64K |
180		I915_GTT_PAGE_SIZE_2M;
181
182	RUNTIME_INFO(i915)->memory_regions = REGION_SMEM;
183	intel_memory_regions_hw_probe(i915);
184
185	spin_lock_init(&i915->gpu_error.lock);
186
187	i915_gem_init__mm(i915);
188	intel_root_gt_init_early(i915);
189	mock_uncore_init(&i915->uncore, i915);
190	atomic_inc(&to_gt(i915)->wakeref.count); /* disable; no hw support */
191	to_gt(i915)->awake = -ENODEV;
192	mock_gt_probe(i915);
193
194	ret = intel_region_ttm_device_init(i915);
195	if (ret)
196		goto err_ttm;
197
198	i915->wq = alloc_ordered_workqueue("mock", 0);
199	if (!i915->wq)
200		goto err_drv;
201
202	mock_init_contexts(i915);
203
204	/* allocate the ggtt */
205	ret = intel_gt_assign_ggtt(to_gt(i915));
206	if (ret)
207		goto err_unlock;
208
209	mock_init_ggtt(to_gt(i915));
210	to_gt(i915)->vm = i915_vm_get(&to_gt(i915)->ggtt->vm);
211
212	RUNTIME_INFO(i915)->platform_engine_mask = BIT(0);
213	to_gt(i915)->info.engine_mask = BIT(0);
214
215	to_gt(i915)->engine[RCS0] = mock_engine(i915, "mock", RCS0);
216	if (!to_gt(i915)->engine[RCS0])
217		goto err_unlock;
218
219	if (mock_engine_init(to_gt(i915)->engine[RCS0]))
220		goto err_context;
221
222	__clear_bit(I915_WEDGED, &to_gt(i915)->reset.flags);
223	intel_engines_driver_register(i915);
224
225	i915->do_release = true;
226	ida_init(&i915->selftest.mock_region_instances);
227
228	return i915;
229
230err_context:
231	intel_gt_driver_remove(to_gt(i915));
232err_unlock:
233	destroy_workqueue(i915->wq);
234err_drv:
235	intel_region_ttm_device_fini(i915);
236err_ttm:
237	intel_gt_driver_late_release_all(i915);
238	intel_memory_regions_driver_release(i915);
239	drm_mode_config_cleanup(&i915->drm);
240	mock_destroy_device(i915);
241
242	return NULL;
243}
244
245void mock_destroy_device(struct drm_i915_private *i915)
246{
247	struct device *dev = i915->drm.dev;
248
249	devres_release_group(dev, NULL);
250	put_device(dev);
251}