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
  36 #include "mock_request.h"
  37 #include "mock_gem_device.h"
  38 #include "mock_gtt.h"
  39 #include "mock_uncore.h"
  40 #include "mock_region.h"
  41
  42 #include "gem/selftests/mock_context.h"
  43 #include "gem/selftests/mock_gem_object.h"
  44
  45 void mock_device_flush(struct drm_i915_private *i915)
  46 {
  47         struct intel_gt *gt = &i915->gt;
  48         struct intel_engine_cs *engine;
  49         enum intel_engine_id id;
  50
  51         do {
  52                 for_each_engine(engine, gt, id)
  53                         mock_engine_flush(engine);
  54         } while (intel_gt_retire_requests_timeout(gt, MAX_SCHEDULE_TIMEOUT));
  55 }
  56
  57 static void mock_device_release(struct drm_device *dev)
  58 {
  59         struct drm_i915_private *i915 = to_i915(dev);
  60
  61         if (!i915->do_release)
  62                 goto out;
  63
  64         mock_device_flush(i915);
  65         intel_gt_driver_remove(&i915->gt);
  66
  67         i915_gem_drain_workqueue(i915);
  68         i915_gem_drain_freed_objects(i915);
  69
  70         mock_fini_ggtt(&i915->ggtt);
  71         destroy_workqueue(i915->wq);
  72
  73         intel_gt_driver_late_release(&i915->gt);
  74         intel_memory_regions_driver_release(i915);
  75
  76         drm_mode_config_cleanup(&i915->drm);
  77
  78 out:
  79         i915_params_free(&i915->params);
  80 }
  81
  82 static const struct drm_driver mock_driver = {
  83         .name = "mock",
  84         .driver_features = DRIVER_GEM,
  85         .release = mock_device_release,
  86 };
  87
  88 static void release_dev(struct device *dev)
  89 {
  90         struct pci_dev *pdev = to_pci_dev(dev);
  91
  92         kfree(pdev);
  93 }
  94
  95 static int pm_domain_resume(struct device *dev)
  96 {
  97         return pm_generic_runtime_resume(dev);
  98 }
  99
 100 static int pm_domain_suspend(struct device *dev)
 101 {
 102         return pm_generic_runtime_suspend(dev);
 103 }
 104
 105 static struct dev_pm_domain pm_domain = {
 106         .ops = {
 107                 .runtime_suspend = pm_domain_suspend,
 108                 .runtime_resume = pm_domain_resume,
 109         },
 110 };
 111
 112 struct drm_i915_private *mock_gem_device(void)
 113 {
 114 #if IS_ENABLED(CONFIG_IOMMU_API) && defined(CONFIG_INTEL_IOMMU)
 115         static struct dev_iommu fake_iommu = { .priv = (void *)-1 };
 116 #endif
 117         struct drm_i915_private *i915;
 118         struct pci_dev *pdev;
 119
 120         pdev = kzalloc(sizeof(*pdev), GFP_KERNEL);
 121         if (!pdev)
 122                 return NULL;
 123         device_initialize(&pdev->dev);
 124         pdev->class = PCI_BASE_CLASS_DISPLAY << 16;
 125         pdev->dev.release = release_dev;
 126         dev_set_name(&pdev->dev, "mock");
 127         dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
 128
 129 #if IS_ENABLED(CONFIG_IOMMU_API) && defined(CONFIG_INTEL_IOMMU)
 130         /* HACK to disable iommu for the fake device; force identity mapping */
 131         pdev->dev.iommu = &fake_iommu;
 132 #endif
 133         if (!devres_open_group(&pdev->dev, NULL, GFP_KERNEL)) {
 134                 put_device(&pdev->dev);
 135                 return NULL;
 136         }
 137
 138         i915 = devm_drm_dev_alloc(&pdev->dev, &mock_driver,
 139                                   struct drm_i915_private, drm);
 140         if (IS_ERR(i915)) {
 141                 pr_err("Failed to allocate mock GEM device: err=%ld\n", PTR_ERR(i915));
 142                 devres_release_group(&pdev->dev, NULL);
 143                 put_device(&pdev->dev);
 144
 145                 return NULL;
 146         }
 147
 148         pci_set_drvdata(pdev, i915);
 149
 150         dev_pm_domain_set(&pdev->dev, &pm_domain);
 151         pm_runtime_enable(&pdev->dev);
 152         pm_runtime_dont_use_autosuspend(&pdev->dev);
 153         if (pm_runtime_enabled(&pdev->dev))
 154                 WARN_ON(pm_runtime_get_sync(&pdev->dev));
 155
 156
 157         i915_params_copy(&i915->params, &i915_modparams);
 158
 159         intel_runtime_pm_init_early(&i915->runtime_pm);
 160
 161         /* Using the global GTT may ask questions about KMS users, so prepare */
 162         drm_mode_config_init(&i915->drm);
 163
 164         mkwrite_device_info(i915)->graphics_ver = -1;
 165
 166         mkwrite_device_info(i915)->page_sizes =
 167                 I915_GTT_PAGE_SIZE_4K |
 168                 I915_GTT_PAGE_SIZE_64K |
 169                 I915_GTT_PAGE_SIZE_2M;
 170
 171         mkwrite_device_info(i915)->memory_regions = REGION_SMEM;
 172         intel_memory_regions_hw_probe(i915);
 173
 174         mock_uncore_init(&i915->uncore, i915);
 175
 176         i915_gem_init__mm(i915);
 177         intel_gt_init_early(&i915->gt, i915);
 178         atomic_inc(&i915->gt.wakeref.count); /* disable; no hw support */
 179         i915->gt.awake = -ENODEV;
 180
 181         i915->wq = alloc_ordered_workqueue("mock", 0);
 182         if (!i915->wq)
 183                 goto err_drv;
 184
 185         mock_init_contexts(i915);
 186
 187         mock_init_ggtt(i915, &i915->ggtt);
 188         i915->gt.vm = i915_vm_get(&i915->ggtt.vm);
 189
 190         mkwrite_device_info(i915)->platform_engine_mask = BIT(0);
 191         i915->gt.info.engine_mask = BIT(0);
 192
 193         i915->gt.engine[RCS0] = mock_engine(i915, "mock", RCS0);
 194         if (!i915->gt.engine[RCS0])
 195                 goto err_unlock;
 196
 197         if (mock_engine_init(i915->gt.engine[RCS0]))
 198                 goto err_context;
 199
 200         __clear_bit(I915_WEDGED, &i915->gt.reset.flags);
 201         intel_engines_driver_register(i915);
 202
 203         i915->do_release = true;
 204
 205         return i915;
 206
 207 err_context:
 208         intel_gt_driver_remove(&i915->gt);
 209 err_unlock:
 210         destroy_workqueue(i915->wq);
 211 err_drv:
 212         intel_gt_driver_late_release(&i915->gt);
 213         intel_memory_regions_driver_release(i915);
 214         drm_mode_config_cleanup(&i915->drm);
 215         mock_destroy_device(i915);
 216
 217         return NULL;
 218 }
 219
 220 void mock_destroy_device(struct drm_i915_private *i915)
 221 {
 222         struct device *dev = i915->drm.dev;
 223
 224         devres_release_group(dev, NULL);
 225         put_device(dev);
 226 }