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         i915_gem_drain_freed_objects(i915);
  71
  72         mock_fini_ggtt(&i915->ggtt);
  73         destroy_workqueue(i915->wq);
  74
  75         intel_region_ttm_device_fini(i915);
  76         intel_gt_driver_late_release(to_gt(i915));
  77         intel_memory_regions_driver_release(i915);
  78
  79         drm_mode_config_cleanup(&i915->drm);
  80
  81 out:
  82         i915_params_free(&i915->params);
  83 }
  84
  85 static const struct drm_driver mock_driver = {
  86         .name = "mock",
  87         .driver_features = DRIVER_GEM,
  88         .release = mock_device_release,
  89 };
  90
  91 static void release_dev(struct device *dev)
  92 {
  93         struct pci_dev *pdev = to_pci_dev(dev);
  94
  95         kfree(pdev);
  96 }
  97
  98 static int pm_domain_resume(struct device *dev)
  99 {
 100         return pm_generic_runtime_resume(dev);
 101 }
 102
 103 static int pm_domain_suspend(struct device *dev)
 104 {
 105         return pm_generic_runtime_suspend(dev);
 106 }
 107
 108 static struct dev_pm_domain pm_domain = {
 109         .ops = {
 110                 .runtime_suspend = pm_domain_suspend,
 111                 .runtime_resume = pm_domain_resume,
 112         },
 113 };
 114
 115 struct drm_i915_private *mock_gem_device(void)
 116 {
 117 #if IS_ENABLED(CONFIG_IOMMU_API) && defined(CONFIG_INTEL_IOMMU)
 118         static struct dev_iommu fake_iommu = { .priv = (void *)-1 };
 119 #endif
 120         struct drm_i915_private *i915;
 121         struct pci_dev *pdev;
 122         int ret;
 123
 124         pdev = kzalloc(sizeof(*pdev), GFP_KERNEL);
 125         if (!pdev)
 126                 return NULL;
 127         device_initialize(&pdev->dev);
 128         pdev->class = PCI_BASE_CLASS_DISPLAY << 16;
 129         pdev->dev.release = release_dev;
 130         dev_set_name(&pdev->dev, "mock");
 131         dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
 132
 133 #if IS_ENABLED(CONFIG_IOMMU_API) && defined(CONFIG_INTEL_IOMMU)
 134         /* HACK to disable iommu for the fake device; force identity mapping */
 135         pdev->dev.iommu = &fake_iommu;
 136 #endif
 137         if (!devres_open_group(&pdev->dev, NULL, GFP_KERNEL)) {
 138                 put_device(&pdev->dev);
 139                 return NULL;
 140         }
 141
 142         i915 = devm_drm_dev_alloc(&pdev->dev, &mock_driver,
 143                                   struct drm_i915_private, drm);
 144         if (IS_ERR(i915)) {
 145                 pr_err("Failed to allocate mock GEM device: err=%ld\n", PTR_ERR(i915));
 146                 devres_release_group(&pdev->dev, NULL);
 147                 put_device(&pdev->dev);
 148
 149                 return NULL;
 150         }
 151
 152         pci_set_drvdata(pdev, i915);
 153
 154         dev_pm_domain_set(&pdev->dev, &pm_domain);
 155         pm_runtime_enable(&pdev->dev);
 156         pm_runtime_dont_use_autosuspend(&pdev->dev);
 157         if (pm_runtime_enabled(&pdev->dev))
 158                 WARN_ON(pm_runtime_get_sync(&pdev->dev));
 159
 160
 161         i915_params_copy(&i915->params, &i915_modparams);
 162
 163         intel_runtime_pm_init_early(&i915->runtime_pm);
 164
 165         /* Using the global GTT may ask questions about KMS users, so prepare */
 166         drm_mode_config_init(&i915->drm);
 167
 168         mkwrite_device_info(i915)->graphics.ver = -1;
 169
 170         mkwrite_device_info(i915)->page_sizes =
 171                 I915_GTT_PAGE_SIZE_4K |
 172                 I915_GTT_PAGE_SIZE_64K |
 173                 I915_GTT_PAGE_SIZE_2M;
 174
 175         mkwrite_device_info(i915)->memory_regions = REGION_SMEM;
 176         intel_memory_regions_hw_probe(i915);
 177
 178         spin_lock_init(&i915->gpu_error.lock);
 179
 180         i915_gem_init__mm(i915);
 181         intel_gt_init_early(to_gt(i915), i915);
 182         __intel_gt_init_early(to_gt(i915), i915);
 183         mock_uncore_init(&i915->uncore, i915);
 184         atomic_inc(&to_gt(i915)->wakeref.count); /* disable; no hw support */
 185         to_gt(i915)->awake = -ENODEV;
 186
 187         ret = intel_region_ttm_device_init(i915);
 188         if (ret)
 189                 goto err_ttm;
 190
 191         i915->wq = alloc_ordered_workqueue("mock", 0);
 192         if (!i915->wq)
 193                 goto err_drv;
 194
 195         mock_init_contexts(i915);
 196
 197         mock_init_ggtt(i915, &i915->ggtt);
 198         to_gt(i915)->vm = i915_vm_get(&i915->ggtt.vm);
 199
 200         mkwrite_device_info(i915)->platform_engine_mask = BIT(0);
 201         to_gt(i915)->info.engine_mask = BIT(0);
 202
 203         to_gt(i915)->engine[RCS0] = mock_engine(i915, "mock", RCS0);
 204         if (!to_gt(i915)->engine[RCS0])
 205                 goto err_unlock;
 206
 207         if (mock_engine_init(to_gt(i915)->engine[RCS0]))
 208                 goto err_context;
 209
 210         __clear_bit(I915_WEDGED, &to_gt(i915)->reset.flags);
 211         intel_engines_driver_register(i915);
 212
 213         i915->do_release = true;
 214         ida_init(&i915->selftest.mock_region_instances);
 215
 216         return i915;
 217
 218 err_context:
 219         intel_gt_driver_remove(to_gt(i915));
 220 err_unlock:
 221         destroy_workqueue(i915->wq);
 222 err_drv:
 223         intel_region_ttm_device_fini(i915);
 224 err_ttm:
 225         intel_gt_driver_late_release(to_gt(i915));
 226         intel_memory_regions_driver_release(i915);
 227         drm_mode_config_cleanup(&i915->drm);
 228         mock_destroy_device(i915);
 229
 230         return NULL;
 231 }
 232
 233 void mock_destroy_device(struct drm_i915_private *i915)
 234 {
 235         struct device *dev = i915->drm.dev;
 236
 237         devres_release_group(dev, NULL);
 238         put_device(dev);
 239 }