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 "mock_engine.h"
  29 #include "mock_context.h"
  30 #include "mock_request.h"
  31 #include "mock_gem_device.h"
  32 #include "mock_gem_object.h"
  33 #include "mock_gtt.h"
  34 #include "mock_uncore.h"
  35
  36 void mock_device_flush(struct drm_i915_private *i915)
  37 {
  38         struct intel_engine_cs *engine;
  39         enum intel_engine_id id;
  40
  41         lockdep_assert_held(&i915->drm.struct_mutex);
  42
  43         for_each_engine(engine, i915, id)
  44                 mock_engine_flush(engine);
  45
  46         i915_gem_retire_requests(i915);
  47 }
  48
  49 static void mock_device_release(struct drm_device *dev)
  50 {
  51         struct drm_i915_private *i915 = to_i915(dev);
  52         struct intel_engine_cs *engine;
  53         enum intel_engine_id id;
  54
  55         mutex_lock(&i915->drm.struct_mutex);
  56         mock_device_flush(i915);
  57         i915_gem_contexts_lost(i915);
  58         mutex_unlock(&i915->drm.struct_mutex);
  59
  60         cancel_delayed_work_sync(&i915->gt.retire_work);
  61         cancel_delayed_work_sync(&i915->gt.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         drain_workqueue(i915->wq);
  71         i915_gem_drain_freed_objects(i915);
  72
  73         mutex_lock(&i915->drm.struct_mutex);
  74         mock_fini_ggtt(i915);
  75         i915_gem_timeline_fini(&i915->gt.global_timeline);
  76         mutex_unlock(&i915->drm.struct_mutex);
  77
  78         destroy_workqueue(i915->wq);
  79
  80         kmem_cache_destroy(i915->priorities);
  81         kmem_cache_destroy(i915->dependencies);
  82         kmem_cache_destroy(i915->requests);
  83         kmem_cache_destroy(i915->vmas);
  84         kmem_cache_destroy(i915->objects);
  85
  86         i915_gemfs_fini(i915);
  87
  88         drm_mode_config_cleanup(&i915->drm);
  89
  90         drm_dev_fini(&i915->drm);
  91         put_device(&i915->drm.pdev->dev);
  92 }
  93
  94 static struct drm_driver mock_driver = {
  95         .name = "mock",
  96         .driver_features = DRIVER_GEM,
  97         .release = mock_device_release,
  98
  99         .gem_close_object = i915_gem_close_object,
 100         .gem_free_object_unlocked = i915_gem_free_object,
 101 };
 102
 103 static void release_dev(struct device *dev)
 104 {
 105         struct pci_dev *pdev = to_pci_dev(dev);
 106
 107         kfree(pdev);
 108 }
 109
 110 static void mock_retire_work_handler(struct work_struct *work)
 111 {
 112 }
 113
 114 static void mock_idle_work_handler(struct work_struct *work)
 115 {
 116 }
 117
 118 static int pm_domain_resume(struct device *dev)
 119 {
 120         return pm_generic_runtime_resume(dev);
 121 }
 122
 123 static int pm_domain_suspend(struct device *dev)
 124 {
 125         return pm_generic_runtime_suspend(dev);
 126 }
 127
 128 static struct dev_pm_domain pm_domain = {
 129         .ops = {
 130                 .runtime_suspend = pm_domain_suspend,
 131                 .runtime_resume = pm_domain_resume,
 132         },
 133 };
 134
 135 struct drm_i915_private *mock_gem_device(void)
 136 {
 137         struct drm_i915_private *i915;
 138         struct intel_engine_cs *engine;
 139         enum intel_engine_id id;
 140         struct pci_dev *pdev;
 141         int err;
 142
 143         pdev = kzalloc(sizeof(*pdev) + sizeof(*i915), GFP_KERNEL);
 144         if (!pdev)
 145                 goto err;
 146
 147         device_initialize(&pdev->dev);
 148         pdev->class = PCI_BASE_CLASS_DISPLAY << 16;
 149         pdev->dev.release = release_dev;
 150         dev_set_name(&pdev->dev, "mock");
 151         dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
 152
 153 #if IS_ENABLED(CONFIG_IOMMU_API) && defined(CONFIG_INTEL_IOMMU)
 154         /* hack to disable iommu for the fake device; force identity mapping */
 155         pdev->dev.archdata.iommu = (void *)-1;
 156 #endif
 157
 158         dev_pm_domain_set(&pdev->dev, &pm_domain);
 159         pm_runtime_enable(&pdev->dev);
 160         pm_runtime_dont_use_autosuspend(&pdev->dev);
 161         WARN_ON(pm_runtime_get_sync(&pdev->dev));
 162
 163         i915 = (struct drm_i915_private *)(pdev + 1);
 164         pci_set_drvdata(pdev, i915);
 165
 166         err = drm_dev_init(&i915->drm, &mock_driver, &pdev->dev);
 167         if (err) {
 168                 pr_err("Failed to initialise mock GEM device: err=%d\n", err);
 169                 goto put_device;
 170         }
 171         i915->drm.pdev = pdev;
 172         i915->drm.dev_private = i915;
 173
 174         /* Using the global GTT may ask questions about KMS users, so prepare */
 175         drm_mode_config_init(&i915->drm);
 176
 177         mkwrite_device_info(i915)->gen = -1;
 178
 179         mkwrite_device_info(i915)->page_sizes =
 180                 I915_GTT_PAGE_SIZE_4K |
 181                 I915_GTT_PAGE_SIZE_64K |
 182                 I915_GTT_PAGE_SIZE_2M;
 183
 184         mock_uncore_init(i915);
 185         i915_gem_init__mm(i915);
 186
 187         init_waitqueue_head(&i915->gpu_error.wait_queue);
 188         init_waitqueue_head(&i915->gpu_error.reset_queue);
 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->gt.retire_work, mock_retire_work_handler);
 197         INIT_DELAYED_WORK(&i915->gt.idle_work, mock_idle_work_handler);
 198
 199         i915->gt.awake = true;
 200
 201         i915->objects = KMEM_CACHE(mock_object, SLAB_HWCACHE_ALIGN);
 202         if (!i915->objects)
 203                 goto err_wq;
 204
 205         i915->vmas = KMEM_CACHE(i915_vma, SLAB_HWCACHE_ALIGN);
 206         if (!i915->vmas)
 207                 goto err_objects;
 208
 209         i915->requests = KMEM_CACHE(mock_request,
 210                                     SLAB_HWCACHE_ALIGN |
 211                                     SLAB_RECLAIM_ACCOUNT |
 212                                     SLAB_TYPESAFE_BY_RCU);
 213         if (!i915->requests)
 214                 goto err_vmas;
 215
 216         i915->dependencies = KMEM_CACHE(i915_dependency,
 217                                         SLAB_HWCACHE_ALIGN |
 218                                         SLAB_RECLAIM_ACCOUNT);
 219         if (!i915->dependencies)
 220                 goto err_requests;
 221
 222         i915->priorities = KMEM_CACHE(i915_priolist, SLAB_HWCACHE_ALIGN);
 223         if (!i915->priorities)
 224                 goto err_dependencies;
 225
 226         mutex_lock(&i915->drm.struct_mutex);
 227         INIT_LIST_HEAD(&i915->gt.timelines);
 228         err = i915_gem_timeline_init__global(i915);
 229         if (err) {
 230                 mutex_unlock(&i915->drm.struct_mutex);
 231                 goto err_priorities;
 232         }
 233
 234         mock_init_ggtt(i915);
 235         mutex_unlock(&i915->drm.struct_mutex);
 236
 237         mkwrite_device_info(i915)->ring_mask = BIT(0);
 238         i915->engine[RCS] = mock_engine(i915, "mock", RCS);
 239         if (!i915->engine[RCS])
 240                 goto err_priorities;
 241
 242         i915->kernel_context = mock_context(i915, NULL);
 243         if (!i915->kernel_context)
 244                 goto err_engine;
 245
 246         i915->preempt_context = mock_context(i915, NULL);
 247         if (!i915->preempt_context)
 248                 goto err_kernel_context;
 249
 250         WARN_ON(i915_gemfs_init(i915));
 251
 252         return i915;
 253
 254 err_kernel_context:
 255         i915_gem_context_put(i915->kernel_context);
 256 err_engine:
 257         for_each_engine(engine, i915, id)
 258                 mock_engine_free(engine);
 259 err_priorities:
 260         kmem_cache_destroy(i915->priorities);
 261 err_dependencies:
 262         kmem_cache_destroy(i915->dependencies);
 263 err_requests:
 264         kmem_cache_destroy(i915->requests);
 265 err_vmas:
 266         kmem_cache_destroy(i915->vmas);
 267 err_objects:
 268         kmem_cache_destroy(i915->objects);
 269 err_wq:
 270         destroy_workqueue(i915->wq);
 271 err_drv:
 272         drm_mode_config_cleanup(&i915->drm);
 273         drm_dev_fini(&i915->drm);
 274 put_device:
 275         put_device(&pdev->dev);
 276 err:
 277         return NULL;
 278 }