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
 28#include "gt/intel_gt.h"
 29#include "gt/mock_engine.h"
 30
 31#include "mock_request.h"
 32#include "mock_gem_device.h"
 33#include "mock_gtt.h"
 34#include "mock_uncore.h"
 35
 36#include "gem/selftests/mock_context.h"
 37#include "gem/selftests/mock_gem_object.h"
 38
 39void mock_device_flush(struct drm_i915_private *i915)
 40{
 41	struct intel_engine_cs *engine;
 42	enum intel_engine_id id;
 43
 44	lockdep_assert_held(&i915->drm.struct_mutex);
 45
 46	do {
 47		for_each_engine(engine, i915, id)
 48			mock_engine_flush(engine);
 49	} while (i915_retire_requests(i915));
 50}
 51
 52static void mock_device_release(struct drm_device *dev)
 53{
 54	struct drm_i915_private *i915 = to_i915(dev);
 55	struct intel_engine_cs *engine;
 56	enum intel_engine_id id;
 57
 58	mutex_lock(&i915->drm.struct_mutex);
 59	mock_device_flush(i915);
 60	mutex_unlock(&i915->drm.struct_mutex);
 61
 62	flush_work(&i915->gem.idle_work);
 63	i915_gem_drain_workqueue(i915);
 64
 65	mutex_lock(&i915->drm.struct_mutex);
 66	for_each_engine(engine, i915, id)
 67		mock_engine_free(engine);
 68	i915_gem_contexts_fini(i915);
 69	mutex_unlock(&i915->drm.struct_mutex);
 70
 71	intel_timelines_fini(i915);
 72
 73	drain_workqueue(i915->wq);
 74	i915_gem_drain_freed_objects(i915);
 75
 76	mutex_lock(&i915->drm.struct_mutex);
 77	mock_fini_ggtt(&i915->ggtt);
 78	mutex_unlock(&i915->drm.struct_mutex);
 79
 80	destroy_workqueue(i915->wq);
 81
 82	i915_gemfs_fini(i915);
 83
 84	drm_mode_config_cleanup(&i915->drm);
 85
 86	drm_dev_fini(&i915->drm);
 87	put_device(&i915->drm.pdev->dev);
 88}
 89
 90static struct drm_driver mock_driver = {
 91	.name = "mock",
 92	.driver_features = DRIVER_GEM,
 93	.release = mock_device_release,
 94
 95	.gem_close_object = i915_gem_close_object,
 96	.gem_free_object_unlocked = i915_gem_free_object,
 97};
 98
 99static void release_dev(struct device *dev)
100{
101	struct pci_dev *pdev = to_pci_dev(dev);
102
103	kfree(pdev);
104}
105
106static void mock_retire_work_handler(struct work_struct *work)
107{
108}
109
110static void mock_idle_work_handler(struct work_struct *work)
111{
112}
113
114static int pm_domain_resume(struct device *dev)
115{
116	return pm_generic_runtime_resume(dev);
117}
118
119static int pm_domain_suspend(struct device *dev)
120{
121	return pm_generic_runtime_suspend(dev);
122}
123
124static struct dev_pm_domain pm_domain = {
125	.ops = {
126		.runtime_suspend = pm_domain_suspend,
127		.runtime_resume = pm_domain_resume,
128	},
129};
130
131struct drm_i915_private *mock_gem_device(void)
132{
133	struct drm_i915_private *i915;
134	struct pci_dev *pdev;
135	int err;
136
137	pdev = kzalloc(sizeof(*pdev) + sizeof(*i915), GFP_KERNEL);
138	if (!pdev)
139		goto err;
140
141	device_initialize(&pdev->dev);
142	pdev->class = PCI_BASE_CLASS_DISPLAY << 16;
143	pdev->dev.release = release_dev;
144	dev_set_name(&pdev->dev, "mock");
145	dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
146
147#if IS_ENABLED(CONFIG_IOMMU_API) && defined(CONFIG_INTEL_IOMMU)
148	/* hack to disable iommu for the fake device; force identity mapping */
149	pdev->dev.archdata.iommu = (void *)-1;
150#endif
151
152	i915 = (struct drm_i915_private *)(pdev + 1);
153	pci_set_drvdata(pdev, i915);
154
155	dev_pm_domain_set(&pdev->dev, &pm_domain);
156	pm_runtime_enable(&pdev->dev);
157	pm_runtime_dont_use_autosuspend(&pdev->dev);
158	if (pm_runtime_enabled(&pdev->dev))
159		WARN_ON(pm_runtime_get_sync(&pdev->dev));
160
161	err = drm_dev_init(&i915->drm, &mock_driver, &pdev->dev);
162	if (err) {
163		pr_err("Failed to initialise mock GEM device: err=%d\n", err);
164		goto put_device;
165	}
166	i915->drm.pdev = pdev;
167	i915->drm.dev_private = i915;
168
169	intel_runtime_pm_init_early(&i915->runtime_pm);
170
171	/* Using the global GTT may ask questions about KMS users, so prepare */
172	drm_mode_config_init(&i915->drm);
173
174	mkwrite_device_info(i915)->gen = -1;
175
176	mkwrite_device_info(i915)->page_sizes =
177		I915_GTT_PAGE_SIZE_4K |
178		I915_GTT_PAGE_SIZE_64K |
179		I915_GTT_PAGE_SIZE_2M;
180
181	mock_uncore_init(&i915->uncore);
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
186	i915->wq = alloc_ordered_workqueue("mock", 0);
187	if (!i915->wq)
188		goto err_drv;
189
190	mock_init_contexts(i915);
191
192	INIT_DELAYED_WORK(&i915->gem.retire_work, mock_retire_work_handler);
193	INIT_WORK(&i915->gem.idle_work, mock_idle_work_handler);
194
195	i915->gt.awake = true;
196
197	intel_timelines_init(i915);
198
199	mutex_lock(&i915->drm.struct_mutex);
200
201	mock_init_ggtt(i915, &i915->ggtt);
202
203	mkwrite_device_info(i915)->engine_mask = BIT(0);
204
205	i915->engine[RCS0] = mock_engine(i915, "mock", RCS0);
206	if (!i915->engine[RCS0])
207		goto err_unlock;
208
209	i915->kernel_context = mock_context(i915, NULL);
210	if (!i915->kernel_context)
211		goto err_engine;
212
213	if (mock_engine_init(i915->engine[RCS0]))
214		goto err_context;
215
216	intel_engines_driver_register(i915);
217	mutex_unlock(&i915->drm.struct_mutex);
218
219	WARN_ON(i915_gemfs_init(i915));
220
221	return i915;
222
223err_context:
224	i915_gem_contexts_fini(i915);
225err_engine:
226	mock_engine_free(i915->engine[RCS0]);
227err_unlock:
228	mutex_unlock(&i915->drm.struct_mutex);
229	intel_timelines_fini(i915);
230	destroy_workqueue(i915->wq);
231err_drv:
232	drm_mode_config_cleanup(&i915->drm);
233	drm_dev_fini(&i915->drm);
234put_device:
235	put_device(&pdev->dev);
236err:
237	return NULL;
238}