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 #include "mock_uncore.h"
  34
  35 void mock_device_flush(struct drm_i915_private *i915)
  36 {
  37         struct intel_engine_cs *engine;
  38         enum intel_engine_id id;
  39
  40         lockdep_assert_held(&i915->drm.struct_mutex);
  41
  42         for_each_engine(engine, i915, id)
  43                 mock_engine_flush(engine);
  44
  45         i915_gem_retire_requests(i915);
  46 }
  47
  48 static void mock_device_release(struct drm_device *dev)
  49 {
  50         struct drm_i915_private *i915 = to_i915(dev);
  51         struct intel_engine_cs *engine;
  52         enum intel_engine_id id;
  53
  54         mutex_lock(&i915->drm.struct_mutex);
  55         mock_device_flush(i915);
  56         mutex_unlock(&i915->drm.struct_mutex);
  57
  58         cancel_delayed_work_sync(&i915->gt.retire_work);
  59         cancel_delayed_work_sync(&i915->gt.idle_work);
  60
  61         mutex_lock(&i915->drm.struct_mutex);
  62         for_each_engine(engine, i915, id)
  63                 mock_engine_free(engine);
  64         i915_gem_context_fini(i915);
  65         mutex_unlock(&i915->drm.struct_mutex);
  66
  67         drain_workqueue(i915->wq);
  68         i915_gem_drain_freed_objects(i915);
  69
  70         mutex_lock(&i915->drm.struct_mutex);
  71         mock_fini_ggtt(i915);
  72         i915_gem_timeline_fini(&i915->gt.global_timeline);
  73         mutex_unlock(&i915->drm.struct_mutex);
  74
  75         destroy_workqueue(i915->wq);
  76
  77         kmem_cache_destroy(i915->priorities);
  78         kmem_cache_destroy(i915->dependencies);
  79         kmem_cache_destroy(i915->requests);
  80         kmem_cache_destroy(i915->vmas);
  81         kmem_cache_destroy(i915->objects);
  82
  83         drm_dev_fini(&i915->drm);
  84         put_device(&i915->drm.pdev->dev);
  85 }
  86
  87 static struct drm_driver mock_driver = {
  88         .name = "mock",
  89         .driver_features = DRIVER_GEM,
  90         .release = mock_device_release,
  91
  92         .gem_close_object = i915_gem_close_object,
  93         .gem_free_object_unlocked = i915_gem_free_object,
  94 };
  95
  96 static void release_dev(struct device *dev)
  97 {
  98         struct pci_dev *pdev = to_pci_dev(dev);
  99
 100         kfree(pdev);
 101 }
 102
 103 static void mock_retire_work_handler(struct work_struct *work)
 104 {
 105 }
 106
 107 static void mock_idle_work_handler(struct work_struct *work)
 108 {
 109 }
 110
 111 struct drm_i915_private *mock_gem_device(void)
 112 {
 113         struct drm_i915_private *i915;
 114         struct intel_engine_cs *engine;
 115         enum intel_engine_id id;
 116         struct pci_dev *pdev;
 117         int err;
 118
 119         pdev = kzalloc(sizeof(*pdev) + sizeof(*i915), GFP_KERNEL);
 120         if (!pdev)
 121                 goto err;
 122
 123         device_initialize(&pdev->dev);
 124         pdev->class = PCI_BASE_CLASS_DISPLAY << 16;
 125         pdev->dev.release = release_dev;
 126         dev_set_name(&pdev->dev, "mock");
 127         dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
 128
 129         pm_runtime_dont_use_autosuspend(&pdev->dev);
 130         pm_runtime_get_sync(&pdev->dev);
 131
 132         i915 = (struct drm_i915_private *)(pdev + 1);
 133         pci_set_drvdata(pdev, i915);
 134
 135         err = drm_dev_init(&i915->drm, &mock_driver, &pdev->dev);
 136         if (err) {
 137                 pr_err("Failed to initialise mock GEM device: err=%d\n", err);
 138                 goto put_device;
 139         }
 140         i915->drm.pdev = pdev;
 141         i915->drm.dev_private = i915;
 142
 143         /* Using the global GTT may ask questions about KMS users, so prepare */
 144         drm_mode_config_init(&i915->drm);
 145
 146         mkwrite_device_info(i915)->gen = -1;
 147
 148         spin_lock_init(&i915->mm.object_stat_lock);
 149         mock_uncore_init(i915);
 150
 151         init_waitqueue_head(&i915->gpu_error.wait_queue);
 152         init_waitqueue_head(&i915->gpu_error.reset_queue);
 153
 154         i915->wq = alloc_ordered_workqueue("mock", 0);
 155         if (!i915->wq)
 156                 goto put_device;
 157
 158         INIT_WORK(&i915->mm.free_work, __i915_gem_free_work);
 159         init_llist_head(&i915->mm.free_list);
 160         INIT_LIST_HEAD(&i915->mm.unbound_list);
 161         INIT_LIST_HEAD(&i915->mm.bound_list);
 162
 163         ida_init(&i915->context_hw_ida);
 164
 165         INIT_DELAYED_WORK(&i915->gt.retire_work, mock_retire_work_handler);
 166         INIT_DELAYED_WORK(&i915->gt.idle_work, mock_idle_work_handler);
 167
 168         i915->gt.awake = true;
 169
 170         i915->objects = KMEM_CACHE(mock_object, SLAB_HWCACHE_ALIGN);
 171         if (!i915->objects)
 172                 goto err_wq;
 173
 174         i915->vmas = KMEM_CACHE(i915_vma, SLAB_HWCACHE_ALIGN);
 175         if (!i915->vmas)
 176                 goto err_objects;
 177
 178         i915->requests = KMEM_CACHE(mock_request,
 179                                     SLAB_HWCACHE_ALIGN |
 180                                     SLAB_RECLAIM_ACCOUNT |
 181                                     SLAB_TYPESAFE_BY_RCU);
 182         if (!i915->requests)
 183                 goto err_vmas;
 184
 185         i915->dependencies = KMEM_CACHE(i915_dependency,
 186                                         SLAB_HWCACHE_ALIGN |
 187                                         SLAB_RECLAIM_ACCOUNT);
 188         if (!i915->dependencies)
 189                 goto err_requests;
 190
 191         i915->priorities = KMEM_CACHE(i915_priolist, SLAB_HWCACHE_ALIGN);
 192         if (!i915->priorities)
 193                 goto err_dependencies;
 194
 195         mutex_lock(&i915->drm.struct_mutex);
 196         INIT_LIST_HEAD(&i915->gt.timelines);
 197         err = i915_gem_timeline_init__global(i915);
 198         if (err) {
 199                 mutex_unlock(&i915->drm.struct_mutex);
 200                 goto err_priorities;
 201         }
 202
 203         mock_init_ggtt(i915);
 204         mutex_unlock(&i915->drm.struct_mutex);
 205
 206         mkwrite_device_info(i915)->ring_mask = BIT(0);
 207         i915->engine[RCS] = mock_engine(i915, "mock");
 208         if (!i915->engine[RCS])
 209                 goto err_priorities;
 210
 211         i915->kernel_context = mock_context(i915, NULL);
 212         if (!i915->kernel_context)
 213                 goto err_engine;
 214
 215         return i915;
 216
 217 err_engine:
 218         for_each_engine(engine, i915, id)
 219                 mock_engine_free(engine);
 220 err_priorities:
 221         kmem_cache_destroy(i915->priorities);
 222 err_dependencies:
 223         kmem_cache_destroy(i915->dependencies);
 224 err_requests:
 225         kmem_cache_destroy(i915->requests);
 226 err_vmas:
 227         kmem_cache_destroy(i915->vmas);
 228 err_objects:
 229         kmem_cache_destroy(i915->objects);
 230 err_wq:
 231         destroy_workqueue(i915->wq);
 232 put_device:
 233         put_device(&pdev->dev);
 234 err:
 235         return NULL;
 236 }