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 = &i915->gt;
 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}
 57
 58static void mock_device_release(struct drm_device *dev)
 59{
 60	struct drm_i915_private *i915 = to_i915(dev);
 61
 62	if (!i915->do_release)
 63		goto out;
 64
 65	mock_device_flush(i915);
 66	intel_gt_driver_remove(&i915->gt);
 67
 68	i915_gem_drain_workqueue(i915);
 69	i915_gem_drain_freed_objects(i915);
 70
 71	mock_fini_ggtt(&i915->ggtt);
 72	destroy_workqueue(i915->wq);
 73
 74	intel_region_ttm_device_fini(i915);
 75	intel_gt_driver_late_release(&i915->gt);
 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
114struct drm_i915_private *mock_gem_device(void)
115{
116#if IS_ENABLED(CONFIG_IOMMU_API) && defined(CONFIG_INTEL_IOMMU)
117	static struct dev_iommu fake_iommu = { .priv = (void *)-1 };
118#endif
119	struct drm_i915_private *i915;
120	struct pci_dev *pdev;
121	int ret;
122
123	pdev = kzalloc(sizeof(*pdev), GFP_KERNEL);
124	if (!pdev)
125		return NULL;
126	device_initialize(&pdev->dev);
127	pdev->class = PCI_BASE_CLASS_DISPLAY << 16;
128	pdev->dev.release = release_dev;
129	dev_set_name(&pdev->dev, "mock");
130	dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
131
132#if IS_ENABLED(CONFIG_IOMMU_API) && defined(CONFIG_INTEL_IOMMU)
133	/* HACK to disable iommu for the fake device; force identity mapping */
134	pdev->dev.iommu = &fake_iommu;
135#endif
136	if (!devres_open_group(&pdev->dev, NULL, GFP_KERNEL)) {
137		put_device(&pdev->dev);
138		return NULL;
139	}
140
141	i915 = devm_drm_dev_alloc(&pdev->dev, &mock_driver,
142				  struct drm_i915_private, drm);
143	if (IS_ERR(i915)) {
144		pr_err("Failed to allocate mock GEM device: err=%ld\n", PTR_ERR(i915));
145		devres_release_group(&pdev->dev, NULL);
146		put_device(&pdev->dev);
147
148		return NULL;
149	}
150
151	pci_set_drvdata(pdev, i915);
152
153	dev_pm_domain_set(&pdev->dev, &pm_domain);
154	pm_runtime_enable(&pdev->dev);
155	pm_runtime_dont_use_autosuspend(&pdev->dev);
156	if (pm_runtime_enabled(&pdev->dev))
157		WARN_ON(pm_runtime_get_sync(&pdev->dev));
158
159
160	i915_params_copy(&i915->params, &i915_modparams);
161
162	intel_runtime_pm_init_early(&i915->runtime_pm);
163
164	/* Using the global GTT may ask questions about KMS users, so prepare */
165	drm_mode_config_init(&i915->drm);
166
167	mkwrite_device_info(i915)->graphics_ver = -1;
168
169	mkwrite_device_info(i915)->page_sizes =
170		I915_GTT_PAGE_SIZE_4K |
171		I915_GTT_PAGE_SIZE_64K |
172		I915_GTT_PAGE_SIZE_2M;
173
174	mkwrite_device_info(i915)->memory_regions = REGION_SMEM;
175	intel_memory_regions_hw_probe(i915);
176
177	mock_uncore_init(&i915->uncore, i915);
178
179	i915_gem_init__mm(i915);
180	intel_gt_init_early(&i915->gt, i915);
181	atomic_inc(&i915->gt.wakeref.count); /* disable; no hw support */
182	i915->gt.awake = -ENODEV;
183
184	ret = intel_region_ttm_device_init(i915);
185	if (ret)
186		goto err_ttm;
187
188	i915->wq = alloc_ordered_workqueue("mock", 0);
189	if (!i915->wq)
190		goto err_drv;
191
192	mock_init_contexts(i915);
193
194	mock_init_ggtt(i915, &i915->ggtt);
195	i915->gt.vm = i915_vm_get(&i915->ggtt.vm);
196
197	mkwrite_device_info(i915)->platform_engine_mask = BIT(0);
198	i915->gt.info.engine_mask = BIT(0);
199
200	i915->gt.engine[RCS0] = mock_engine(i915, "mock", RCS0);
201	if (!i915->gt.engine[RCS0])
202		goto err_unlock;
203
204	if (mock_engine_init(i915->gt.engine[RCS0]))
205		goto err_context;
206
207	__clear_bit(I915_WEDGED, &i915->gt.reset.flags);
208	intel_engines_driver_register(i915);
209
210	i915->do_release = true;
211	ida_init(&i915->selftest.mock_region_instances);
212
213	return i915;
214
215err_context:
216	intel_gt_driver_remove(&i915->gt);
217err_unlock:
218	destroy_workqueue(i915->wq);
219err_drv:
220	intel_region_ttm_device_fini(i915);
221err_ttm:
222	intel_gt_driver_late_release(&i915->gt);
223	intel_memory_regions_driver_release(i915);
224	drm_mode_config_cleanup(&i915->drm);
225	mock_destroy_device(i915);
226
227	return NULL;
228}
229
230void mock_destroy_device(struct drm_i915_private *i915)
231{
232	struct device *dev = i915->drm.dev;
233
234	devres_release_group(dev, NULL);
235	put_device(dev);
236}