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
  36 #include "mock_request.h"
  37 #include "mock_gem_device.h"
  38 #include "mock_gtt.h"
  39 #include "mock_uncore.h"
  40 #include "mock_region.h"
  41
  42 #include "gem/selftests/mock_context.h"
  43 #include "gem/selftests/mock_gem_object.h"
  44
  45 void mock_device_flush(struct drm_i915_private *i915)
  46 {
  47         struct intel_gt *gt = &i915->gt;
  48         struct intel_engine_cs *engine;
  49         enum intel_engine_id id;
  50
  51         do {
  52                 for_each_engine(engine, gt, id)
  53                         mock_engine_flush(engine);
  54         } while (intel_gt_retire_requests_timeout(gt, MAX_SCHEDULE_TIMEOUT));
  55 }
  56
  57 static void mock_device_release(struct drm_device *dev)
  58 {
  59         struct drm_i915_private *i915 = to_i915(dev);
  60
  61         if (!i915->do_release)
  62                 goto out;
  63
  64         mock_device_flush(i915);
  65         intel_gt_driver_remove(&i915->gt);
  66
  67         i915_gem_driver_release__contexts(i915);
  68
  69         i915_gem_drain_workqueue(i915);
  70         i915_gem_drain_freed_objects(i915);
  71
  72         mock_fini_ggtt(&i915->ggtt);
  73         destroy_workqueue(i915->wq);
  74
  75         intel_gt_driver_late_release(&i915->gt);
  76         intel_memory_regions_driver_release(i915);
  77
  78         drm_mode_config_cleanup(&i915->drm);
  79
  80 out:
  81         i915_params_free(&i915->params);
  82 }
  83
  84 static struct drm_driver mock_driver = {
  85         .name = "mock",
  86         .driver_features = DRIVER_GEM,
  87         .release = mock_device_release,
  88
  89         .gem_close_object = i915_gem_close_object,
  90         .gem_free_object_unlocked = i915_gem_free_object,
  91 };
  92
  93 static void release_dev(struct device *dev)
  94 {
  95         struct pci_dev *pdev = to_pci_dev(dev);
  96
  97         kfree(pdev);
  98 }
  99
 100 static int pm_domain_resume(struct device *dev)
 101 {
 102         return pm_generic_runtime_resume(dev);
 103 }
 104
 105 static int pm_domain_suspend(struct device *dev)
 106 {
 107         return pm_generic_runtime_suspend(dev);
 108 }
 109
 110 static struct dev_pm_domain pm_domain = {
 111         .ops = {
 112                 .runtime_suspend = pm_domain_suspend,
 113                 .runtime_resume = pm_domain_resume,
 114         },
 115 };
 116
 117 struct drm_i915_private *mock_gem_device(void)
 118 {
 119 #if IS_ENABLED(CONFIG_IOMMU_API) && defined(CONFIG_INTEL_IOMMU)
 120         static struct dev_iommu fake_iommu = { .priv = (void *)-1 };
 121 #endif
 122         struct drm_i915_private *i915;
 123         struct pci_dev *pdev;
 124
 125         pdev = kzalloc(sizeof(*pdev), GFP_KERNEL);
 126         if (!pdev)
 127                 return NULL;
 128         device_initialize(&pdev->dev);
 129         pdev->class = PCI_BASE_CLASS_DISPLAY << 16;
 130         pdev->dev.release = release_dev;
 131         dev_set_name(&pdev->dev, "mock");
 132         dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
 133
 134 #if IS_ENABLED(CONFIG_IOMMU_API) && defined(CONFIG_INTEL_IOMMU)
 135         /* HACK to disable iommu for the fake device; force identity mapping */
 136         pdev->dev.iommu = &fake_iommu;
 137 #endif
 138         if (!devres_open_group(&pdev->dev, NULL, GFP_KERNEL)) {
 139                 put_device(&pdev->dev);
 140                 return NULL;
 141         }
 142
 143         i915 = devm_drm_dev_alloc(&pdev->dev, &mock_driver,
 144                                   struct drm_i915_private, drm);
 145         if (IS_ERR(i915)) {
 146                 pr_err("Failed to allocate mock GEM device: err=%ld\n", PTR_ERR(i915));
 147                 devres_release_group(&pdev->dev, NULL);
 148                 put_device(&pdev->dev);
 149
 150                 return NULL;
 151         }
 152
 153         pci_set_drvdata(pdev, i915);
 154         i915->drm.pdev = pdev;
 155
 156         dev_pm_domain_set(&pdev->dev, &pm_domain);
 157         pm_runtime_enable(&pdev->dev);
 158         pm_runtime_dont_use_autosuspend(&pdev->dev);
 159         if (pm_runtime_enabled(&pdev->dev))
 160                 WARN_ON(pm_runtime_get_sync(&pdev->dev));
 161
 162
 163         i915_params_copy(&i915->params, &i915_modparams);
 164
 165         intel_runtime_pm_init_early(&i915->runtime_pm);
 166
 167         /* Using the global GTT may ask questions about KMS users, so prepare */
 168         drm_mode_config_init(&i915->drm);
 169
 170         mkwrite_device_info(i915)->gen = -1;
 171
 172         mkwrite_device_info(i915)->page_sizes =
 173                 I915_GTT_PAGE_SIZE_4K |
 174                 I915_GTT_PAGE_SIZE_64K |
 175                 I915_GTT_PAGE_SIZE_2M;
 176
 177         mkwrite_device_info(i915)->memory_regions = REGION_SMEM;
 178         intel_memory_regions_hw_probe(i915);
 179
 180         mock_uncore_init(&i915->uncore, i915);
 181
 182         i915_gem_init__mm(i915);
 183         intel_gt_init_early(&i915->gt, i915);
 184         atomic_inc(&i915->gt.wakeref.count); /* disable; no hw support */
 185         i915->gt.awake = -ENODEV;
 186
 187         i915->wq = alloc_ordered_workqueue("mock", 0);
 188         if (!i915->wq)
 189                 goto err_drv;
 190
 191         mock_init_contexts(i915);
 192
 193         mock_init_ggtt(i915, &i915->ggtt);
 194         i915->gt.vm = i915_vm_get(&i915->ggtt.vm);
 195
 196         mkwrite_device_info(i915)->platform_engine_mask = BIT(0);
 197         i915->gt.info.engine_mask = BIT(0);
 198
 199         i915->gt.engine[RCS0] = mock_engine(i915, "mock", RCS0);
 200         if (!i915->gt.engine[RCS0])
 201                 goto err_unlock;
 202
 203         if (mock_engine_init(i915->gt.engine[RCS0]))
 204                 goto err_context;
 205
 206         __clear_bit(I915_WEDGED, &i915->gt.reset.flags);
 207         intel_engines_driver_register(i915);
 208
 209         i915->do_release = true;
 210
 211         return i915;
 212
 213 err_context:
 214         intel_gt_driver_remove(&i915->gt);
 215 err_unlock:
 216         destroy_workqueue(i915->wq);
 217 err_drv:
 218         intel_gt_driver_late_release(&i915->gt);
 219         intel_memory_regions_driver_release(i915);
 220         drm_mode_config_cleanup(&i915->drm);
 221         mock_destroy_device(i915);
 222
 223         return NULL;
 224 }
 225
 226 void mock_destroy_device(struct drm_i915_private *i915)
 227 {
 228         struct device *dev = i915->drm.dev;
 229
 230         devres_release_group(dev, NULL);
 231         put_device(dev);
 232 }