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 "gt/intel_gt.h"
  29 #include "gt/mock_engine.h"
  30
  31 #include "mock_request.h"
  32 #include "mock_gem_device.h"
  33 #include "mock_gtt.h"
  34 #include "mock_uncore.h"
  35
  36 #include "gem/selftests/mock_context.h"
  37 #include "gem/selftests/mock_gem_object.h"
  38
  39 void mock_device_flush(struct drm_i915_private *i915)
  40 {
  41         struct intel_engine_cs *engine;
  42         enum intel_engine_id id;
  43
  44         lockdep_assert_held(&i915->drm.struct_mutex);
  45
  46         do {
  47                 for_each_engine(engine, i915, id)
  48                         mock_engine_flush(engine);
  49         } while (i915_retire_requests(i915));
  50 }
  51
  52 static void mock_device_release(struct drm_device *dev)
  53 {
  54         struct drm_i915_private *i915 = to_i915(dev);
  55         struct intel_engine_cs *engine;
  56         enum intel_engine_id id;
  57
  58         mutex_lock(&i915->drm.struct_mutex);
  59         mock_device_flush(i915);
  60         mutex_unlock(&i915->drm.struct_mutex);
  61
  62         flush_work(&i915->gem.idle_work);
  63         i915_gem_drain_workqueue(i915);
  64
  65         mutex_lock(&i915->drm.struct_mutex);
  66         for_each_engine(engine, i915, id)
  67                 mock_engine_free(engine);
  68         i915_gem_contexts_fini(i915);
  69         mutex_unlock(&i915->drm.struct_mutex);
  70
  71         intel_timelines_fini(i915);
  72
  73         drain_workqueue(i915->wq);
  74         i915_gem_drain_freed_objects(i915);
  75
  76         mutex_lock(&i915->drm.struct_mutex);
  77         mock_fini_ggtt(&i915->ggtt);
  78         mutex_unlock(&i915->drm.struct_mutex);
  79
  80         destroy_workqueue(i915->wq);
  81
  82         i915_gemfs_fini(i915);
  83
  84         drm_mode_config_cleanup(&i915->drm);
  85
  86         drm_dev_fini(&i915->drm);
  87         put_device(&i915->drm.pdev->dev);
  88 }
  89
  90 static struct drm_driver mock_driver = {
  91         .name = "mock",
  92         .driver_features = DRIVER_GEM,
  93         .release = mock_device_release,
  94
  95         .gem_close_object = i915_gem_close_object,
  96         .gem_free_object_unlocked = i915_gem_free_object,
  97 };
  98
  99 static void release_dev(struct device *dev)
 100 {
 101         struct pci_dev *pdev = to_pci_dev(dev);
 102
 103         kfree(pdev);
 104 }
 105
 106 static void mock_retire_work_handler(struct work_struct *work)
 107 {
 108 }
 109
 110 static void mock_idle_work_handler(struct work_struct *work)
 111 {
 112 }
 113
 114 static int pm_domain_resume(struct device *dev)
 115 {
 116         return pm_generic_runtime_resume(dev);
 117 }
 118
 119 static int pm_domain_suspend(struct device *dev)
 120 {
 121         return pm_generic_runtime_suspend(dev);
 122 }
 123
 124 static struct dev_pm_domain pm_domain = {
 125         .ops = {
 126                 .runtime_suspend = pm_domain_suspend,
 127                 .runtime_resume = pm_domain_resume,
 128         },
 129 };
 130
 131 struct drm_i915_private *mock_gem_device(void)
 132 {
 133         struct drm_i915_private *i915;
 134         struct pci_dev *pdev;
 135         int err;
 136
 137         pdev = kzalloc(sizeof(*pdev) + sizeof(*i915), GFP_KERNEL);
 138         if (!pdev)
 139                 goto err;
 140
 141         device_initialize(&pdev->dev);
 142         pdev->class = PCI_BASE_CLASS_DISPLAY << 16;
 143         pdev->dev.release = release_dev;
 144         dev_set_name(&pdev->dev, "mock");
 145         dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
 146
 147 #if IS_ENABLED(CONFIG_IOMMU_API) && defined(CONFIG_INTEL_IOMMU)
 148         /* hack to disable iommu for the fake device; force identity mapping */
 149         pdev->dev.archdata.iommu = (void *)-1;
 150 #endif
 151
 152         i915 = (struct drm_i915_private *)(pdev + 1);
 153         pci_set_drvdata(pdev, i915);
 154
 155         dev_pm_domain_set(&pdev->dev, &pm_domain);
 156         pm_runtime_enable(&pdev->dev);
 157         pm_runtime_dont_use_autosuspend(&pdev->dev);
 158         if (pm_runtime_enabled(&pdev->dev))
 159                 WARN_ON(pm_runtime_get_sync(&pdev->dev));
 160
 161         err = drm_dev_init(&i915->drm, &mock_driver, &pdev->dev);
 162         if (err) {
 163                 pr_err("Failed to initialise mock GEM device: err=%d\n", err);
 164                 goto put_device;
 165         }
 166         i915->drm.pdev = pdev;
 167         i915->drm.dev_private = i915;
 168
 169         intel_runtime_pm_init_early(&i915->runtime_pm);
 170
 171         /* Using the global GTT may ask questions about KMS users, so prepare */
 172         drm_mode_config_init(&i915->drm);
 173
 174         mkwrite_device_info(i915)->gen = -1;
 175
 176         mkwrite_device_info(i915)->page_sizes =
 177                 I915_GTT_PAGE_SIZE_4K |
 178                 I915_GTT_PAGE_SIZE_64K |
 179                 I915_GTT_PAGE_SIZE_2M;
 180
 181         mock_uncore_init(&i915->uncore);
 182         i915_gem_init__mm(i915);
 183         intel_gt_init_early(&i915->gt, i915);
 184         atomic_inc(&i915->gt.wakeref.count); /* disable; no hw support */
 185
 186         i915->wq = alloc_ordered_workqueue("mock", 0);
 187         if (!i915->wq)
 188                 goto err_drv;
 189
 190         mock_init_contexts(i915);
 191
 192         INIT_DELAYED_WORK(&i915->gem.retire_work, mock_retire_work_handler);
 193         INIT_WORK(&i915->gem.idle_work, mock_idle_work_handler);
 194
 195         i915->gt.awake = true;
 196
 197         intel_timelines_init(i915);
 198
 199         mutex_lock(&i915->drm.struct_mutex);
 200
 201         mock_init_ggtt(i915, &i915->ggtt);
 202
 203         mkwrite_device_info(i915)->engine_mask = BIT(0);
 204
 205         i915->engine[RCS0] = mock_engine(i915, "mock", RCS0);
 206         if (!i915->engine[RCS0])
 207                 goto err_unlock;
 208
 209         i915->kernel_context = mock_context(i915, NULL);
 210         if (!i915->kernel_context)
 211                 goto err_engine;
 212
 213         if (mock_engine_init(i915->engine[RCS0]))
 214                 goto err_context;
 215
 216         intel_engines_driver_register(i915);
 217         mutex_unlock(&i915->drm.struct_mutex);
 218
 219         WARN_ON(i915_gemfs_init(i915));
 220
 221         return i915;
 222
 223 err_context:
 224         i915_gem_contexts_fini(i915);
 225 err_engine:
 226         mock_engine_free(i915->engine[RCS0]);
 227 err_unlock:
 228         mutex_unlock(&i915->drm.struct_mutex);
 229         intel_timelines_fini(i915);
 230         destroy_workqueue(i915->wq);
 231 err_drv:
 232         drm_mode_config_cleanup(&i915->drm);
 233         drm_dev_fini(&i915->drm);
 234 put_device:
 235         put_device(&pdev->dev);
 236 err:
 237         return NULL;
 238 }