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_driver_release__contexts(i915);
  68
  69         i915_gem_drain_workqueue(i915);
  70         i915_gem_drain_freed_objects(i915);
  71
  72         mock_fini_ggtt(&i915->ggtt);
  73         destroy_workqueue(i915->wq);
  74
  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
 122         pdev = kzalloc(sizeof(*pdev), GFP_KERNEL);
 123         if (!pdev)
 124                 return NULL;
 125         device_initialize(&pdev->dev);
 126         pdev->class = PCI_BASE_CLASS_DISPLAY << 16;
 127         pdev->dev.release = release_dev;
 128         dev_set_name(&pdev->dev, "mock");
 129         dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
 130
 131 #if IS_ENABLED(CONFIG_IOMMU_API) && defined(CONFIG_INTEL_IOMMU)
 132         /* HACK to disable iommu for the fake device; force identity mapping */
 133         pdev->dev.iommu = &fake_iommu;
 134 #endif
 135         if (!devres_open_group(&pdev->dev, NULL, GFP_KERNEL)) {
 136                 put_device(&pdev->dev);
 137                 return NULL;
 138         }
 139
 140         i915 = devm_drm_dev_alloc(&pdev->dev, &mock_driver,
 141                                   struct drm_i915_private, drm);
 142         if (IS_ERR(i915)) {
 143                 pr_err("Failed to allocate mock GEM device: err=%ld\n", PTR_ERR(i915));
 144                 devres_release_group(&pdev->dev, NULL);
 145                 put_device(&pdev->dev);
 146
 147                 return NULL;
 148         }
 149
 150         pci_set_drvdata(pdev, i915);
 151         i915->drm.pdev = pdev;
 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)->gen = -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         i915->wq = alloc_ordered_workqueue("mock", 0);
 185         if (!i915->wq)
 186                 goto err_drv;
 187
 188         mock_init_contexts(i915);
 189
 190         mock_init_ggtt(i915, &i915->ggtt);
 191         i915->gt.vm = i915_vm_get(&i915->ggtt.vm);
 192
 193         mkwrite_device_info(i915)->platform_engine_mask = BIT(0);
 194         i915->gt.info.engine_mask = BIT(0);
 195
 196         i915->gt.engine[RCS0] = mock_engine(i915, "mock", RCS0);
 197         if (!i915->gt.engine[RCS0])
 198                 goto err_unlock;
 199
 200         if (mock_engine_init(i915->gt.engine[RCS0]))
 201                 goto err_context;
 202
 203         __clear_bit(I915_WEDGED, &i915->gt.reset.flags);
 204         intel_engines_driver_register(i915);
 205
 206         i915->do_release = true;
 207
 208         return i915;
 209
 210 err_context:
 211         intel_gt_driver_remove(&i915->gt);
 212 err_unlock:
 213         destroy_workqueue(i915->wq);
 214 err_drv:
 215         intel_gt_driver_late_release(&i915->gt);
 216         intel_memory_regions_driver_release(i915);
 217         drm_mode_config_cleanup(&i915->drm);
 218         mock_destroy_device(i915);
 219
 220         return NULL;
 221 }
 222
 223 void mock_destroy_device(struct drm_i915_private *i915)
 224 {
 225         struct device *dev = i915->drm.dev;
 226
 227         devres_release_group(dev, NULL);
 228         put_device(dev);
 229 }