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_retire_requests(i915);
  47         GEM_BUG_ON(i915->gt.active_requests);
  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         cancel_delayed_work_sync(&i915->gt.retire_work);
  62         cancel_delayed_work_sync(&i915->gt.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         drain_workqueue(i915->wq);
  72         i915_gem_drain_freed_objects(i915);
  73
  74         mutex_lock(&i915->drm.struct_mutex);
  75         mock_fini_ggtt(i915);
  76         mutex_unlock(&i915->drm.struct_mutex);
  77         WARN_ON(!list_empty(&i915->gt.timelines));
  78
  79         destroy_workqueue(i915->wq);
  80
  81         kmem_cache_destroy(i915->priorities);
  82         kmem_cache_destroy(i915->dependencies);
  83         kmem_cache_destroy(i915->requests);
  84         kmem_cache_destroy(i915->vmas);
  85         kmem_cache_destroy(i915->objects);
  86
  87         i915_gemfs_fini(i915);
  88
  89         drm_mode_config_cleanup(&i915->drm);
  90
  91         drm_dev_fini(&i915->drm);
  92         put_device(&i915->drm.pdev->dev);
  93 }
  94
  95 static struct drm_driver mock_driver = {
  96         .name = "mock",
  97         .driver_features = DRIVER_GEM,
  98         .release = mock_device_release,
  99
 100         .gem_close_object = i915_gem_close_object,
 101         .gem_free_object_unlocked = i915_gem_free_object,
 102 };
 103
 104 static void release_dev(struct device *dev)
 105 {
 106         struct pci_dev *pdev = to_pci_dev(dev);
 107
 108         kfree(pdev);
 109 }
 110
 111 static void mock_retire_work_handler(struct work_struct *work)
 112 {
 113 }
 114
 115 static void mock_idle_work_handler(struct work_struct *work)
 116 {
 117 }
 118
 119 static int pm_domain_resume(struct device *dev)
 120 {
 121         return pm_generic_runtime_resume(dev);
 122 }
 123
 124 static int pm_domain_suspend(struct device *dev)
 125 {
 126         return pm_generic_runtime_suspend(dev);
 127 }
 128
 129 static struct dev_pm_domain pm_domain = {
 130         .ops = {
 131                 .runtime_suspend = pm_domain_suspend,
 132                 .runtime_resume = pm_domain_resume,
 133         },
 134 };
 135
 136 struct drm_i915_private *mock_gem_device(void)
 137 {
 138         struct drm_i915_private *i915;
 139         struct pci_dev *pdev;
 140         int err;
 141
 142         pdev = kzalloc(sizeof(*pdev) + sizeof(*i915), GFP_KERNEL);
 143         if (!pdev)
 144                 goto err;
 145
 146         device_initialize(&pdev->dev);
 147         pdev->class = PCI_BASE_CLASS_DISPLAY << 16;
 148         pdev->dev.release = release_dev;
 149         dev_set_name(&pdev->dev, "mock");
 150         dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
 151
 152 #if IS_ENABLED(CONFIG_IOMMU_API) && defined(CONFIG_INTEL_IOMMU)
 153         /* hack to disable iommu for the fake device; force identity mapping */
 154         pdev->dev.archdata.iommu = (void *)-1;
 155 #endif
 156
 157         dev_pm_domain_set(&pdev->dev, &pm_domain);
 158         pm_runtime_enable(&pdev->dev);
 159         pm_runtime_dont_use_autosuspend(&pdev->dev);
 160         if (pm_runtime_enabled(&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         INIT_LIST_HEAD(&i915->gt.timelines);
 227         INIT_LIST_HEAD(&i915->gt.active_rings);
 228         INIT_LIST_HEAD(&i915->gt.closed_vma);
 229
 230         mutex_lock(&i915->drm.struct_mutex);
 231
 232         mock_init_ggtt(i915);
 233
 234         mkwrite_device_info(i915)->ring_mask = BIT(0);
 235         i915->kernel_context = mock_context(i915, NULL);
 236         if (!i915->kernel_context)
 237                 goto err_unlock;
 238
 239         i915->engine[RCS] = mock_engine(i915, "mock", RCS);
 240         if (!i915->engine[RCS])
 241                 goto err_context;
 242
 243         mutex_unlock(&i915->drm.struct_mutex);
 244
 245         WARN_ON(i915_gemfs_init(i915));
 246
 247         return i915;
 248
 249 err_context:
 250         i915_gem_contexts_fini(i915);
 251 err_unlock:
 252         mutex_unlock(&i915->drm.struct_mutex);
 253         kmem_cache_destroy(i915->priorities);
 254 err_dependencies:
 255         kmem_cache_destroy(i915->dependencies);
 256 err_requests:
 257         kmem_cache_destroy(i915->requests);
 258 err_vmas:
 259         kmem_cache_destroy(i915->vmas);
 260 err_objects:
 261         kmem_cache_destroy(i915->objects);
 262 err_wq:
 263         destroy_workqueue(i915->wq);
 264 err_drv:
 265         drm_mode_config_cleanup(&i915->drm);
 266         drm_dev_fini(&i915->drm);
 267 put_device:
 268         put_device(&pdev->dev);
 269 err:
 270         return NULL;
 271 }