drivers/gpu/drm/i915/selftests/mock_gem_device.c

   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
  46 void 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
  59 static 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
  80 out:
  81         i915_params_free(&i915->params);
  82 }
  83
  84 static const struct drm_driver mock_driver = {
  85         .name = "mock",
  86         .driver_features = DRIVER_GEM,
  87         .release = mock_device_release,
  88 };
  89
  90 static void release_dev(struct device *dev)
  91 {
  92         struct pci_dev *pdev = to_pci_dev(dev);
  93
  94         kfree(pdev);
  95 }
  96
  97 static int pm_domain_resume(struct device *dev)
  98 {
  99         return pm_generic_runtime_resume(dev);
 100 }
 101
 102 static int pm_domain_suspend(struct device *dev)
 103 {
 104         return pm_generic_runtime_suspend(dev);
 105 }
 106
 107 static struct dev_pm_domain pm_domain = {
 108         .ops = {
 109                 .runtime_suspend = pm_domain_suspend,
 110                 .runtime_resume = pm_domain_resume,
 111         },
 112 };
 113
 114 static 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
 120 struct 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
 230 err_context:
 231         intel_gt_driver_remove(to_gt(i915));
 232 err_unlock:
 233         destroy_workqueue(i915->wq);
 234 err_drv:
 235         intel_region_ttm_device_fini(i915);
 236 err_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
 245 void 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 }