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 = &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
  58 static 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
  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 struct 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
 215 err_context:
 216         intel_gt_driver_remove(&i915->gt);
 217 err_unlock:
 218         destroy_workqueue(i915->wq);
 219 err_drv:
 220         intel_region_ttm_device_fini(i915);
 221 err_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
 230 void 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 }