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/mock_engine.h"
  29
  30 #include "mock_context.h"
  31 #include "mock_request.h"
  32 #include "mock_gem_device.h"
  33 #include "mock_gem_object.h"
  34 #include "mock_gtt.h"
  35 #include "mock_uncore.h"
  36
  37 void mock_device_flush(struct drm_i915_private *i915)
  38 {
  39         struct intel_engine_cs *engine;
  40         enum intel_engine_id id;
  41
  42         lockdep_assert_held(&i915->drm.struct_mutex);
  43
  44         do {
  45                 for_each_engine(engine, i915, id)
  46                         mock_engine_flush(engine);
  47         } while (i915_retire_requests(i915));
  48 }
  49
  50 static void mock_device_release(struct drm_device *dev)
  51 {
  52         struct drm_i915_private *i915 = to_i915(dev);
  53         struct intel_engine_cs *engine;
  54         enum intel_engine_id id;
  55
  56         mutex_lock(&i915->drm.struct_mutex);
  57         mock_device_flush(i915);
  58         i915_gem_contexts_lost(i915);
  59         mutex_unlock(&i915->drm.struct_mutex);
  60
  61         flush_work(&i915->gem.idle_work);
  62         i915_gem_drain_workqueue(i915);
  63
  64         mutex_lock(&i915->drm.struct_mutex);
  65         for_each_engine(engine, i915, id)
  66                 mock_engine_free(engine);
  67         i915_gem_contexts_fini(i915);
  68         mutex_unlock(&i915->drm.struct_mutex);
  69
  70         i915_timelines_fini(i915);
  71
  72         drain_workqueue(i915->wq);
  73         i915_gem_drain_freed_objects(i915);
  74
  75         mutex_lock(&i915->drm.struct_mutex);
  76         mock_fini_ggtt(&i915->ggtt);
  77         mutex_unlock(&i915->drm.struct_mutex);
  78
  79         destroy_workqueue(i915->wq);
  80
  81         i915_gemfs_fini(i915);
  82
  83         drm_mode_config_cleanup(&i915->drm);
  84
  85         drm_dev_fini(&i915->drm);
  86         put_device(&i915->drm.pdev->dev);
  87 }
  88
  89 static struct drm_driver mock_driver = {
  90         .name = "mock",
  91         .driver_features = DRIVER_GEM,
  92         .release = mock_device_release,
  93
  94         .gem_close_object = i915_gem_close_object,
  95         .gem_free_object_unlocked = i915_gem_free_object,
  96 };
  97
  98 static void release_dev(struct device *dev)
  99 {
 100         struct pci_dev *pdev = to_pci_dev(dev);
 101
 102         kfree(pdev);
 103 }
 104
 105 static void mock_retire_work_handler(struct work_struct *work)
 106 {
 107 }
 108
 109 static void mock_idle_work_handler(struct work_struct *work)
 110 {
 111 }
 112
 113 static int pm_domain_resume(struct device *dev)
 114 {
 115         return pm_generic_runtime_resume(dev);
 116 }
 117
 118 static int pm_domain_suspend(struct device *dev)
 119 {
 120         return pm_generic_runtime_suspend(dev);
 121 }
 122
 123 static struct dev_pm_domain pm_domain = {
 124         .ops = {
 125                 .runtime_suspend = pm_domain_suspend,
 126                 .runtime_resume = pm_domain_resume,
 127         },
 128 };
 129
 130 struct drm_i915_private *mock_gem_device(void)
 131 {
 132         struct drm_i915_private *i915;
 133         struct pci_dev *pdev;
 134         int err;
 135
 136         pdev = kzalloc(sizeof(*pdev) + sizeof(*i915), GFP_KERNEL);
 137         if (!pdev)
 138                 goto err;
 139
 140         device_initialize(&pdev->dev);
 141         pdev->class = PCI_BASE_CLASS_DISPLAY << 16;
 142         pdev->dev.release = release_dev;
 143         dev_set_name(&pdev->dev, "mock");
 144         dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
 145
 146 #if IS_ENABLED(CONFIG_IOMMU_API) && defined(CONFIG_INTEL_IOMMU)
 147         /* hack to disable iommu for the fake device; force identity mapping */
 148         pdev->dev.archdata.iommu = (void *)-1;
 149 #endif
 150
 151         i915 = (struct drm_i915_private *)(pdev + 1);
 152         pci_set_drvdata(pdev, i915);
 153
 154         intel_runtime_pm_init_early(i915);
 155
 156         dev_pm_domain_set(&pdev->dev, &pm_domain);
 157         pm_runtime_enable(&pdev->dev);
 158         pm_runtime_dont_use_autosuspend(&pdev->dev);
 159         if (pm_runtime_enabled(&pdev->dev))
 160                 WARN_ON(pm_runtime_get_sync(&pdev->dev));
 161
 162         err = drm_dev_init(&i915->drm, &mock_driver, &pdev->dev);
 163         if (err) {
 164                 pr_err("Failed to initialise mock GEM device: err=%d\n", err);
 165                 goto put_device;
 166         }
 167         i915->drm.pdev = pdev;
 168         i915->drm.dev_private = i915;
 169
 170         /* Using the global GTT may ask questions about KMS users, so prepare */
 171         drm_mode_config_init(&i915->drm);
 172
 173         mkwrite_device_info(i915)->gen = -1;
 174
 175         mkwrite_device_info(i915)->page_sizes =
 176                 I915_GTT_PAGE_SIZE_4K |
 177                 I915_GTT_PAGE_SIZE_64K |
 178                 I915_GTT_PAGE_SIZE_2M;
 179
 180         mock_uncore_init(&i915->uncore);
 181         i915_gem_init__mm(i915);
 182         intel_gt_pm_init(i915);
 183         atomic_inc(&i915->gt.wakeref.count); /* disable; no hw support */
 184
 185         init_waitqueue_head(&i915->gpu_error.wait_queue);
 186         init_waitqueue_head(&i915->gpu_error.reset_queue);
 187         init_srcu_struct(&i915->gpu_error.reset_backoff_srcu);
 188         mutex_init(&i915->gpu_error.wedge_mutex);
 189
 190         i915->wq = alloc_ordered_workqueue("mock", 0);
 191         if (!i915->wq)
 192                 goto err_drv;
 193
 194         mock_init_contexts(i915);
 195
 196         INIT_DELAYED_WORK(&i915->gem.retire_work, mock_retire_work_handler);
 197         INIT_WORK(&i915->gem.idle_work, mock_idle_work_handler);
 198
 199         i915->gt.awake = true;
 200
 201         i915_timelines_init(i915);
 202
 203         INIT_LIST_HEAD(&i915->gt.active_rings);
 204         INIT_LIST_HEAD(&i915->gt.closed_vma);
 205
 206         mutex_lock(&i915->drm.struct_mutex);
 207
 208         mock_init_ggtt(i915, &i915->ggtt);
 209
 210         mkwrite_device_info(i915)->engine_mask = BIT(0);
 211
 212         i915->engine[RCS0] = mock_engine(i915, "mock", RCS0);
 213         if (!i915->engine[RCS0])
 214                 goto err_unlock;
 215
 216         i915->kernel_context = mock_context(i915, NULL);
 217         if (!i915->kernel_context)
 218                 goto err_engine;
 219
 220         if (mock_engine_init(i915->engine[RCS0]))
 221                 goto err_context;
 222
 223         mutex_unlock(&i915->drm.struct_mutex);
 224
 225         WARN_ON(i915_gemfs_init(i915));
 226
 227         return i915;
 228
 229 err_context:
 230         i915_gem_contexts_fini(i915);
 231 err_engine:
 232         mock_engine_free(i915->engine[RCS0]);
 233 err_unlock:
 234         mutex_unlock(&i915->drm.struct_mutex);
 235         i915_timelines_fini(i915);
 236         destroy_workqueue(i915->wq);
 237 err_drv:
 238         drm_mode_config_cleanup(&i915->drm);
 239         drm_dev_fini(&i915->drm);
 240 put_device:
 241         put_device(&pdev->dev);
 242 err:
 243         return NULL;
 244 }