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_runtime.h>
  26
  27 #include "mock_engine.h"
  28 #include "mock_context.h"
  29 #include "mock_request.h"
  30 #include "mock_gem_device.h"
  31 #include "mock_gem_object.h"
  32 #include "mock_gtt.h"
  33
  34 void mock_device_flush(struct drm_i915_private *i915)
  35 {
  36         struct intel_engine_cs *engine;
  37         enum intel_engine_id id;
  38
  39         lockdep_assert_held(&i915->drm.struct_mutex);
  40
  41         for_each_engine(engine, i915, id)
  42                 mock_engine_flush(engine);
  43
  44         i915_gem_retire_requests(i915);
  45 }
  46
  47 static void mock_device_release(struct drm_device *dev)
  48 {
  49         struct drm_i915_private *i915 = to_i915(dev);
  50         struct intel_engine_cs *engine;
  51         enum intel_engine_id id;
  52
  53         mutex_lock(&i915->drm.struct_mutex);
  54         mock_device_flush(i915);
  55         mutex_unlock(&i915->drm.struct_mutex);
  56
  57         cancel_delayed_work_sync(&i915->gt.retire_work);
  58         cancel_delayed_work_sync(&i915->gt.idle_work);
  59
  60         mutex_lock(&i915->drm.struct_mutex);
  61         for_each_engine(engine, i915, id)
  62                 mock_engine_free(engine);
  63         i915_gem_context_fini(i915);
  64         mutex_unlock(&i915->drm.struct_mutex);
  65
  66         drain_workqueue(i915->wq);
  67         i915_gem_drain_freed_objects(i915);
  68
  69         mutex_lock(&i915->drm.struct_mutex);
  70         mock_fini_ggtt(i915);
  71         i915_gem_timeline_fini(&i915->gt.global_timeline);
  72         mutex_unlock(&i915->drm.struct_mutex);
  73
  74         destroy_workqueue(i915->wq);
  75
  76         kmem_cache_destroy(i915->dependencies);
  77         kmem_cache_destroy(i915->requests);
  78         kmem_cache_destroy(i915->vmas);
  79         kmem_cache_destroy(i915->objects);
  80
  81         drm_dev_fini(&i915->drm);
  82         put_device(&i915->drm.pdev->dev);
  83 }
  84
  85 static struct drm_driver mock_driver = {
  86         .name = "mock",
  87         .driver_features = DRIVER_GEM,
  88         .release = mock_device_release,
  89
  90         .gem_close_object = i915_gem_close_object,
  91         .gem_free_object_unlocked = i915_gem_free_object,
  92 };
  93
  94 static void release_dev(struct device *dev)
  95 {
  96         struct pci_dev *pdev = to_pci_dev(dev);
  97
  98         kfree(pdev);
  99 }
 100
 101 static void mock_retire_work_handler(struct work_struct *work)
 102 {
 103 }
 104
 105 static void mock_idle_work_handler(struct work_struct *work)
 106 {
 107 }
 108
 109 struct drm_i915_private *mock_gem_device(void)
 110 {
 111         struct drm_i915_private *i915;
 112         struct intel_engine_cs *engine;
 113         enum intel_engine_id id;
 114         struct pci_dev *pdev;
 115         int err;
 116
 117         pdev = kzalloc(sizeof(*pdev) + sizeof(*i915), GFP_KERNEL);
 118         if (!pdev)
 119                 goto err;
 120
 121         device_initialize(&pdev->dev);
 122         pdev->dev.release = release_dev;
 123         dev_set_name(&pdev->dev, "mock");
 124         dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
 125
 126         pm_runtime_dont_use_autosuspend(&pdev->dev);
 127         pm_runtime_get_sync(&pdev->dev);
 128
 129         i915 = (struct drm_i915_private *)(pdev + 1);
 130         pci_set_drvdata(pdev, i915);
 131
 132         err = drm_dev_init(&i915->drm, &mock_driver, &pdev->dev);
 133         if (err) {
 134                 pr_err("Failed to initialise mock GEM device: err=%d\n", err);
 135                 goto put_device;
 136         }
 137         i915->drm.pdev = pdev;
 138         i915->drm.dev_private = i915;
 139
 140         /* Using the global GTT may ask questions about KMS users, so prepare */
 141         drm_mode_config_init(&i915->drm);
 142
 143         mkwrite_device_info(i915)->gen = -1;
 144
 145         spin_lock_init(&i915->mm.object_stat_lock);
 146
 147         init_waitqueue_head(&i915->gpu_error.wait_queue);
 148         init_waitqueue_head(&i915->gpu_error.reset_queue);
 149
 150         i915->wq = alloc_ordered_workqueue("mock", 0);
 151         if (!i915->wq)
 152                 goto put_device;
 153
 154         INIT_WORK(&i915->mm.free_work, __i915_gem_free_work);
 155         init_llist_head(&i915->mm.free_list);
 156         INIT_LIST_HEAD(&i915->mm.unbound_list);
 157         INIT_LIST_HEAD(&i915->mm.bound_list);
 158
 159         ida_init(&i915->context_hw_ida);
 160
 161         INIT_DELAYED_WORK(&i915->gt.retire_work, mock_retire_work_handler);
 162         INIT_DELAYED_WORK(&i915->gt.idle_work, mock_idle_work_handler);
 163
 164         i915->gt.awake = true;
 165
 166         i915->objects = KMEM_CACHE(mock_object, SLAB_HWCACHE_ALIGN);
 167         if (!i915->objects)
 168                 goto err_wq;
 169
 170         i915->vmas = KMEM_CACHE(i915_vma, SLAB_HWCACHE_ALIGN);
 171         if (!i915->vmas)
 172                 goto err_objects;
 173
 174         i915->requests = KMEM_CACHE(mock_request,
 175                                     SLAB_HWCACHE_ALIGN |
 176                                     SLAB_RECLAIM_ACCOUNT |
 177                                     SLAB_TYPESAFE_BY_RCU);
 178         if (!i915->requests)
 179                 goto err_vmas;
 180
 181         i915->dependencies = KMEM_CACHE(i915_dependency,
 182                                         SLAB_HWCACHE_ALIGN |
 183                                         SLAB_RECLAIM_ACCOUNT);
 184         if (!i915->dependencies)
 185                 goto err_requests;
 186
 187         mutex_lock(&i915->drm.struct_mutex);
 188         INIT_LIST_HEAD(&i915->gt.timelines);
 189         err = i915_gem_timeline_init__global(i915);
 190         if (err) {
 191                 mutex_unlock(&i915->drm.struct_mutex);
 192                 goto err_dependencies;
 193         }
 194
 195         mock_init_ggtt(i915);
 196         mutex_unlock(&i915->drm.struct_mutex);
 197
 198         mkwrite_device_info(i915)->ring_mask = BIT(0);
 199         i915->engine[RCS] = mock_engine(i915, "mock");
 200         if (!i915->engine[RCS])
 201                 goto err_dependencies;
 202
 203         i915->kernel_context = mock_context(i915, NULL);
 204         if (!i915->kernel_context)
 205                 goto err_engine;
 206
 207         return i915;
 208
 209 err_engine:
 210         for_each_engine(engine, i915, id)
 211                 mock_engine_free(engine);
 212 err_dependencies:
 213         kmem_cache_destroy(i915->dependencies);
 214 err_requests:
 215         kmem_cache_destroy(i915->requests);
 216 err_vmas:
 217         kmem_cache_destroy(i915->vmas);
 218 err_objects:
 219         kmem_cache_destroy(i915->objects);
 220 err_wq:
 221         destroy_workqueue(i915->wq);
 222 put_device:
 223         put_device(&pdev->dev);
 224 err:
 225         return NULL;
 226 }