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->unordered_wq);
 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
 81out:
 82	i915_params_free(&i915->params);
 83}
 84
 85static const struct drm_driver mock_driver = {
 86	.name = "mock",
 87	.driver_features = DRIVER_GEM,
 88	.release = mock_device_release,
 89};
 90
 91static void release_dev(struct device *dev)
 92{
 93	struct pci_dev *pdev = to_pci_dev(dev);
 94
 95	kfree(pdev);
 96}
 97
 98static int pm_domain_resume(struct device *dev)
 99{
100	return pm_generic_runtime_resume(dev);
101}
102
103static int pm_domain_suspend(struct device *dev)
104{
105	return pm_generic_runtime_suspend(dev);
106}
107
108static struct dev_pm_domain pm_domain = {
109	.ops = {
110		.runtime_suspend = pm_domain_suspend,
111		.runtime_resume = pm_domain_resume,
112	},
113};
114
115static void mock_gt_probe(struct drm_i915_private *i915)
116{
117	i915->gt[0]->name = "Mock GT";
118}
119
120static const struct intel_device_info mock_info = {
121	.__runtime.graphics.ip.ver = -1,
122	.__runtime.page_sizes = (I915_GTT_PAGE_SIZE_4K |
123				 I915_GTT_PAGE_SIZE_64K |
124				 I915_GTT_PAGE_SIZE_2M),
125	.memory_regions = REGION_SMEM,
126	.platform_engine_mask = BIT(0),
127
128	/* simply use legacy cache level for mock device */
129	.max_pat_index = 3,
130	.cachelevel_to_pat = {
131		[I915_CACHE_NONE]   = 0,
132		[I915_CACHE_LLC]    = 1,
133		[I915_CACHE_L3_LLC] = 2,
134		[I915_CACHE_WT]     = 3,
135	},
136};
137
138struct drm_i915_private *mock_gem_device(void)
139{
140#if IS_ENABLED(CONFIG_IOMMU_API) && defined(CONFIG_INTEL_IOMMU)
141	static struct dev_iommu fake_iommu = { .priv = (void *)-1 };
142#endif
143	struct drm_i915_private *i915;
144	struct pci_dev *pdev;
145	int ret;
146
147	pdev = kzalloc(sizeof(*pdev), GFP_KERNEL);
148	if (!pdev)
149		return NULL;
150	device_initialize(&pdev->dev);
151	pdev->class = PCI_BASE_CLASS_DISPLAY << 16;
152	pdev->dev.release = release_dev;
153	dev_set_name(&pdev->dev, "mock");
154	dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
155
156#if IS_ENABLED(CONFIG_IOMMU_API) && defined(CONFIG_INTEL_IOMMU)
157	/* HACK to disable iommu for the fake device; force identity mapping */
158	pdev->dev.iommu = &fake_iommu;
159#endif
160	if (!devres_open_group(&pdev->dev, NULL, GFP_KERNEL)) {
161		put_device(&pdev->dev);
162		return NULL;
163	}
164
165	i915 = devm_drm_dev_alloc(&pdev->dev, &mock_driver,
166				  struct drm_i915_private, drm);
167	if (IS_ERR(i915)) {
168		pr_err("Failed to allocate mock GEM device: err=%ld\n", PTR_ERR(i915));
169		devres_release_group(&pdev->dev, NULL);
170		put_device(&pdev->dev);
171
172		return NULL;
173	}
174
175	pci_set_drvdata(pdev, i915);
176
177	/* Device parameters start as a copy of module parameters. */
178	i915_params_copy(&i915->params, &i915_modparams);
179
180	/* Set up device info and initial runtime info. */
181	intel_device_info_driver_create(i915, pdev->device, &mock_info);
182
183	intel_display_device_probe(i915);
184
185	dev_pm_domain_set(&pdev->dev, &pm_domain);
186	pm_runtime_enable(&pdev->dev);
187	pm_runtime_dont_use_autosuspend(&pdev->dev);
188	if (pm_runtime_enabled(&pdev->dev))
189		WARN_ON(pm_runtime_get_sync(&pdev->dev));
190
191	intel_runtime_pm_init_early(&i915->runtime_pm);
192	/* wakeref tracking has significant overhead */
193	i915->runtime_pm.no_wakeref_tracking = true;
194
195	/* Using the global GTT may ask questions about KMS users, so prepare */
196	drm_mode_config_init(&i915->drm);
197
198	intel_memory_regions_hw_probe(i915);
199
200	spin_lock_init(&i915->gpu_error.lock);
201
202	i915_gem_init__mm(i915);
203	intel_root_gt_init_early(i915);
204	mock_uncore_init(&i915->uncore, i915);
205	atomic_inc(&to_gt(i915)->wakeref.count); /* disable; no hw support */
206	to_gt(i915)->awake = -ENODEV;
207	mock_gt_probe(i915);
208
209	ret = intel_region_ttm_device_init(i915);
210	if (ret)
211		goto err_ttm;
212
213	i915->wq = alloc_ordered_workqueue("mock", 0);
214	if (!i915->wq)
215		goto err_drv;
216
217	i915->unordered_wq = alloc_workqueue("mock-unordered", 0, 0);
218	if (!i915->unordered_wq)
219		goto err_wq;
220
221	mock_init_contexts(i915);
222
223	/* allocate the ggtt */
224	ret = intel_gt_assign_ggtt(to_gt(i915));
225	if (ret)
226		goto err_unlock;
227
228	mock_init_ggtt(to_gt(i915));
229	to_gt(i915)->vm = i915_vm_get(&to_gt(i915)->ggtt->vm);
230
231	to_gt(i915)->info.engine_mask = BIT(0);
232
233	to_gt(i915)->engine[RCS0] = mock_engine(i915, "mock", RCS0);
234	if (!to_gt(i915)->engine[RCS0])
235		goto err_unlock;
236
237	if (mock_engine_init(to_gt(i915)->engine[RCS0]))
238		goto err_context;
239
240	__clear_bit(I915_WEDGED, &to_gt(i915)->reset.flags);
241	intel_engines_driver_register(i915);
242
243	i915->do_release = true;
244	ida_init(&i915->selftest.mock_region_instances);
245
246	return i915;
247
248err_context:
249	intel_gt_driver_remove(to_gt(i915));
250err_unlock:
251	destroy_workqueue(i915->unordered_wq);
252err_wq:
253	destroy_workqueue(i915->wq);
254err_drv:
255	intel_region_ttm_device_fini(i915);
256err_ttm:
257	intel_gt_driver_late_release_all(i915);
258	intel_memory_regions_driver_release(i915);
259	drm_mode_config_cleanup(&i915->drm);
260	mock_destroy_device(i915);
261
262	return NULL;
263}
264
265void mock_destroy_device(struct drm_i915_private *i915)
266{
267	struct device *dev = i915->drm.dev;
268
269	devres_release_group(dev, NULL);
270	put_device(dev);
271}