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 #include <linux/iommu.h>
  28
  29 #include <drm/drm_managed.h>
  30
  31 #include "gt/intel_gt.h"
  32 #include "gt/intel_gt_requests.h"
  33 #include "gt/mock_engine.h"
  34 #include "intel_memory_region.h"
  35 #include "intel_region_ttm.h"
  36
  37 #include "mock_request.h"
  38 #include "mock_gem_device.h"
  39 #include "mock_gtt.h"
  40 #include "mock_uncore.h"
  41 #include "mock_region.h"
  42
  43 #include "gem/selftests/mock_context.h"
  44 #include "gem/selftests/mock_gem_object.h"
  45
  46 void mock_device_flush(struct drm_i915_private *i915)
  47 {
  48         struct intel_gt *gt = to_gt(i915);
  49         struct intel_engine_cs *engine;
  50         enum intel_engine_id id;
  51
  52         do {
  53                 for_each_engine(engine, gt, id)
  54                         mock_engine_flush(engine);
  55         } while (intel_gt_retire_requests_timeout(gt, MAX_SCHEDULE_TIMEOUT,
  56                                                   NULL));
  57 }
  58
  59 static void mock_device_release(struct drm_device *dev)
  60 {
  61         struct drm_i915_private *i915 = to_i915(dev);
  62
  63         if (!i915->do_release)
  64                 goto out;
  65
  66         mock_device_flush(i915);
  67         intel_gt_driver_remove(to_gt(i915));
  68
  69         i915_gem_drain_workqueue(i915);
  70
  71         mock_fini_ggtt(to_gt(i915)->ggtt);
  72         destroy_workqueue(i915->unordered_wq);
  73         destroy_workqueue(i915->wq);
  74
  75         intel_region_ttm_device_fini(i915);
  76         intel_gt_driver_late_release_all(i915);
  77         intel_memory_regions_driver_release(i915);
  78
  79         drm_mode_config_cleanup(&i915->drm);
  80
  81 out:
  82         i915_params_free(&i915->params);
  83 }
  84
  85 static const struct drm_driver mock_driver = {
  86         .name = "mock",
  87         .driver_features = DRIVER_GEM,
  88         .release = mock_device_release,
  89 };
  90
  91 static void release_dev(struct device *dev)
  92 {
  93         struct pci_dev *pdev = to_pci_dev(dev);
  94
  95         kfree(pdev);
  96 }
  97
  98 static int pm_domain_resume(struct device *dev)
  99 {
 100         return pm_generic_runtime_resume(dev);
 101 }
 102
 103 static int pm_domain_suspend(struct device *dev)
 104 {
 105         return pm_generic_runtime_suspend(dev);
 106 }
 107
 108 static struct dev_pm_domain pm_domain = {
 109         .ops = {
 110                 .runtime_suspend = pm_domain_suspend,
 111                 .runtime_resume = pm_domain_resume,
 112         },
 113 };
 114
 115 static void mock_gt_probe(struct drm_i915_private *i915)
 116 {
 117         i915->gt[0]->name = "Mock GT";
 118 }
 119
 120 static const struct intel_device_info mock_info = {
 121         .__runtime.graphics.ip.ver = -1,
 122         .__runtime.page_sizes = (I915_GTT_PAGE_SIZE_4K |
 123                                  I915_GTT_PAGE_SIZE_64K |
 124                                  I915_GTT_PAGE_SIZE_2M),
 125         .memory_regions = REGION_SMEM,
 126         .platform_engine_mask = BIT(0),
 127
 128         /* simply use legacy cache level for mock device */
 129         .max_pat_index = 3,
 130         .cachelevel_to_pat = {
 131                 [I915_CACHE_NONE]   = 0,
 132                 [I915_CACHE_LLC]    = 1,
 133                 [I915_CACHE_L3_LLC] = 2,
 134                 [I915_CACHE_WT]     = 3,
 135         },
 136 };
 137
 138 struct drm_i915_private *mock_gem_device(void)
 139 {
 140 #if IS_ENABLED(CONFIG_IOMMU_API) && defined(CONFIG_INTEL_IOMMU)
 141         static struct dev_iommu fake_iommu = { .priv = (void *)-1 };
 142 #endif
 143         struct drm_i915_private *i915;
 144         struct pci_dev *pdev;
 145         int ret;
 146
 147         pdev = kzalloc(sizeof(*pdev), GFP_KERNEL);
 148         if (!pdev)
 149                 return NULL;
 150         device_initialize(&pdev->dev);
 151         pdev->class = PCI_BASE_CLASS_DISPLAY << 16;
 152         pdev->dev.release = release_dev;
 153         dev_set_name(&pdev->dev, "mock");
 154         dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
 155
 156 #if IS_ENABLED(CONFIG_IOMMU_API) && defined(CONFIG_INTEL_IOMMU)
 157         /* HACK to disable iommu for the fake device; force identity mapping */
 158         pdev->dev.iommu = &fake_iommu;
 159 #endif
 160         if (!devres_open_group(&pdev->dev, NULL, GFP_KERNEL)) {
 161                 put_device(&pdev->dev);
 162                 return NULL;
 163         }
 164
 165         i915 = devm_drm_dev_alloc(&pdev->dev, &mock_driver,
 166                                   struct drm_i915_private, drm);
 167         if (IS_ERR(i915)) {
 168                 pr_err("Failed to allocate mock GEM device: err=%ld\n", PTR_ERR(i915));
 169                 devres_release_group(&pdev->dev, NULL);
 170                 put_device(&pdev->dev);
 171
 172                 return NULL;
 173         }
 174
 175         pci_set_drvdata(pdev, i915);
 176
 177         /* Device parameters start as a copy of module parameters. */
 178         i915_params_copy(&i915->params, &i915_modparams);
 179
 180         /* Set up device info and initial runtime info. */
 181         intel_device_info_driver_create(i915, pdev->device, &mock_info);
 182
 183         intel_display_device_probe(i915);
 184
 185         dev_pm_domain_set(&pdev->dev, &pm_domain);
 186         pm_runtime_enable(&pdev->dev);
 187         pm_runtime_dont_use_autosuspend(&pdev->dev);
 188         if (pm_runtime_enabled(&pdev->dev))
 189                 WARN_ON(pm_runtime_get_sync(&pdev->dev));
 190
 191         intel_runtime_pm_init_early(&i915->runtime_pm);
 192         /* wakeref tracking has significant overhead */
 193         i915->runtime_pm.no_wakeref_tracking = true;
 194
 195         /* Using the global GTT may ask questions about KMS users, so prepare */
 196         drm_mode_config_init(&i915->drm);
 197
 198         intel_memory_regions_hw_probe(i915);
 199
 200         spin_lock_init(&i915->gpu_error.lock);
 201
 202         i915_gem_init__mm(i915);
 203         intel_root_gt_init_early(i915);
 204         mock_uncore_init(&i915->uncore, i915);
 205         atomic_inc(&to_gt(i915)->wakeref.count); /* disable; no hw support */
 206         to_gt(i915)->awake = -ENODEV;
 207         mock_gt_probe(i915);
 208
 209         ret = intel_region_ttm_device_init(i915);
 210         if (ret)
 211                 goto err_ttm;
 212
 213         i915->wq = alloc_ordered_workqueue("mock", 0);
 214         if (!i915->wq)
 215                 goto err_drv;
 216
 217         i915->unordered_wq = alloc_workqueue("mock-unordered", 0, 0);
 218         if (!i915->unordered_wq)
 219                 goto err_wq;
 220
 221         mock_init_contexts(i915);
 222
 223         /* allocate the ggtt */
 224         ret = intel_gt_assign_ggtt(to_gt(i915));
 225         if (ret)
 226                 goto err_unlock;
 227
 228         mock_init_ggtt(to_gt(i915));
 229         to_gt(i915)->vm = i915_vm_get(&to_gt(i915)->ggtt->vm);
 230
 231         to_gt(i915)->info.engine_mask = BIT(0);
 232
 233         to_gt(i915)->engine[RCS0] = mock_engine(i915, "mock", RCS0);
 234         if (!to_gt(i915)->engine[RCS0])
 235                 goto err_unlock;
 236
 237         if (mock_engine_init(to_gt(i915)->engine[RCS0]))
 238                 goto err_context;
 239
 240         __clear_bit(I915_WEDGED, &to_gt(i915)->reset.flags);
 241         intel_engines_driver_register(i915);
 242
 243         i915->do_release = true;
 244         ida_init(&i915->selftest.mock_region_instances);
 245
 246         return i915;
 247
 248 err_context:
 249         intel_gt_driver_remove(to_gt(i915));
 250 err_unlock:
 251         destroy_workqueue(i915->unordered_wq);
 252 err_wq:
 253         destroy_workqueue(i915->wq);
 254 err_drv:
 255         intel_region_ttm_device_fini(i915);
 256 err_ttm:
 257         intel_gt_driver_late_release_all(i915);
 258         intel_memory_regions_driver_release(i915);
 259         drm_mode_config_cleanup(&i915->drm);
 260         mock_destroy_device(i915);
 261
 262         return NULL;
 263 }
 264
 265 void mock_destroy_device(struct drm_i915_private *i915)
 266 {
 267         struct device *dev = i915->drm.dev;
 268
 269         devres_release_group(dev, NULL);
 270         put_device(dev);
 271 }