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
  28 #include <drm/drm_managed.h>
  29
  30 #include "gt/intel_gt.h"
  31 #include "gt/intel_gt_requests.h"
  32 #include "gt/mock_engine.h"
  33 #include "intel_memory_region.h"
  34
  35 #include "mock_request.h"
  36 #include "mock_gem_device.h"
  37 #include "mock_gtt.h"
  38 #include "mock_uncore.h"
  39 #include "mock_region.h"
  40
  41 #include "gem/selftests/mock_context.h"
  42 #include "gem/selftests/mock_gem_object.h"
  43
  44 void mock_device_flush(struct drm_i915_private *i915)
  45 {
  46         struct intel_gt *gt = &i915->gt;
  47         struct intel_engine_cs *engine;
  48         enum intel_engine_id id;
  49
  50         do {
  51                 for_each_engine(engine, gt, id)
  52                         mock_engine_flush(engine);
  53         } while (intel_gt_retire_requests_timeout(gt, MAX_SCHEDULE_TIMEOUT));
  54 }
  55
  56 static void mock_device_release(struct drm_device *dev)
  57 {
  58         struct drm_i915_private *i915 = to_i915(dev);
  59
  60         if (!i915->do_release)
  61                 goto out;
  62
  63         mock_device_flush(i915);
  64         intel_gt_driver_remove(&i915->gt);
  65
  66         i915_gem_driver_release__contexts(i915);
  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_gt_driver_late_release(&i915->gt);
  75         intel_memory_regions_driver_release(i915);
  76
  77         drm_mode_config_cleanup(&i915->drm);
  78
  79 out:
  80         put_device(&i915->drm.pdev->dev);
  81         i915->drm.pdev = NULL;
  82 }
  83
  84 static struct drm_driver mock_driver = {
  85         .name = "mock",
  86         .driver_features = DRIVER_GEM,
  87         .release = mock_device_release,
  88
  89         .gem_close_object = i915_gem_close_object,
  90         .gem_free_object_unlocked = i915_gem_free_object,
  91 };
  92
  93 static void release_dev(struct device *dev)
  94 {
  95         struct pci_dev *pdev = to_pci_dev(dev);
  96
  97         kfree(pdev);
  98 }
  99
 100 static int pm_domain_resume(struct device *dev)
 101 {
 102         return pm_generic_runtime_resume(dev);
 103 }
 104
 105 static int pm_domain_suspend(struct device *dev)
 106 {
 107         return pm_generic_runtime_suspend(dev);
 108 }
 109
 110 static struct dev_pm_domain pm_domain = {
 111         .ops = {
 112                 .runtime_suspend = pm_domain_suspend,
 113                 .runtime_resume = pm_domain_resume,
 114         },
 115 };
 116
 117 struct drm_i915_private *mock_gem_device(void)
 118 {
 119         struct drm_i915_private *i915;
 120         struct pci_dev *pdev;
 121         int err;
 122
 123         pdev = kzalloc(sizeof(*pdev), GFP_KERNEL);
 124         if (!pdev)
 125                 return NULL;
 126         i915 = kzalloc(sizeof(*i915), GFP_KERNEL);
 127         if (!i915) {
 128                 kfree(pdev);
 129                 return NULL;
 130         }
 131
 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.archdata.iommu = (void *)-1;
 141 #endif
 142
 143         pci_set_drvdata(pdev, i915);
 144
 145         dev_pm_domain_set(&pdev->dev, &pm_domain);
 146         pm_runtime_enable(&pdev->dev);
 147         pm_runtime_dont_use_autosuspend(&pdev->dev);
 148         if (pm_runtime_enabled(&pdev->dev))
 149                 WARN_ON(pm_runtime_get_sync(&pdev->dev));
 150
 151         err = drm_dev_init(&i915->drm, &mock_driver, &pdev->dev);
 152         if (err) {
 153                 pr_err("Failed to initialise mock GEM device: err=%d\n", err);
 154                 put_device(&pdev->dev);
 155                 kfree(i915);
 156
 157                 return NULL;
 158         }
 159         i915->drm.pdev = pdev;
 160         drmm_add_final_kfree(&i915->drm, i915);
 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)->engine_mask = BIT(0);
 194
 195         i915->gt.engine[RCS0] = mock_engine(i915, "mock", RCS0);
 196         if (!i915->gt.engine[RCS0])
 197                 goto err_unlock;
 198
 199         if (mock_engine_init(i915->gt.engine[RCS0]))
 200                 goto err_context;
 201
 202         __clear_bit(I915_WEDGED, &i915->gt.reset.flags);
 203         intel_engines_driver_register(i915);
 204
 205         i915->do_release = true;
 206
 207         return i915;
 208
 209 err_context:
 210         intel_gt_driver_remove(&i915->gt);
 211 err_unlock:
 212         destroy_workqueue(i915->wq);
 213 err_drv:
 214         intel_gt_driver_late_release(&i915->gt);
 215         intel_memory_regions_driver_release(i915);
 216         drm_mode_config_cleanup(&i915->drm);
 217         drm_dev_put(&i915->drm);
 218
 219         return NULL;
 220 }