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         put_device(&i915->drm.pdev->dev);
  82         i915->drm.pdev = NULL;
  83 }
  84
  85 static struct drm_driver mock_driver = {
  86         .name = "mock",
  87         .driver_features = DRIVER_GEM,
  88         .release = mock_device_release,
  89
  90         .gem_close_object = i915_gem_close_object,
  91         .gem_free_object_unlocked = i915_gem_free_object,
  92 };
  93
  94 static void release_dev(struct device *dev)
  95 {
  96         struct pci_dev *pdev = to_pci_dev(dev);
  97
  98         kfree(pdev);
  99 }
 100
 101 static int pm_domain_resume(struct device *dev)
 102 {
 103         return pm_generic_runtime_resume(dev);
 104 }
 105
 106 static int pm_domain_suspend(struct device *dev)
 107 {
 108         return pm_generic_runtime_suspend(dev);
 109 }
 110
 111 static struct dev_pm_domain pm_domain = {
 112         .ops = {
 113                 .runtime_suspend = pm_domain_suspend,
 114                 .runtime_resume = pm_domain_resume,
 115         },
 116 };
 117
 118 struct drm_i915_private *mock_gem_device(void)
 119 {
 120         struct drm_i915_private *i915;
 121         struct pci_dev *pdev;
 122 #if IS_ENABLED(CONFIG_IOMMU_API) && defined(CONFIG_INTEL_IOMMU)
 123         struct dev_iommu iommu;
 124 #endif
 125         int err;
 126
 127         pdev = kzalloc(sizeof(*pdev), GFP_KERNEL);
 128         if (!pdev)
 129                 return NULL;
 130         i915 = kzalloc(sizeof(*i915), GFP_KERNEL);
 131         if (!i915) {
 132                 kfree(pdev);
 133                 return NULL;
 134         }
 135
 136         device_initialize(&pdev->dev);
 137         pdev->class = PCI_BASE_CLASS_DISPLAY << 16;
 138         pdev->dev.release = release_dev;
 139         dev_set_name(&pdev->dev, "mock");
 140         dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
 141
 142 #if IS_ENABLED(CONFIG_IOMMU_API) && defined(CONFIG_INTEL_IOMMU)
 143         /* HACK HACK HACK to disable iommu for the fake device; force identity mapping */
 144         memset(&iommu, 0, sizeof(iommu));
 145         iommu.priv = (void *)-1;
 146         pdev->dev.iommu = &iommu;
 147 #endif
 148
 149         pci_set_drvdata(pdev, i915);
 150
 151         dev_pm_domain_set(&pdev->dev, &pm_domain);
 152         pm_runtime_enable(&pdev->dev);
 153         pm_runtime_dont_use_autosuspend(&pdev->dev);
 154         if (pm_runtime_enabled(&pdev->dev))
 155                 WARN_ON(pm_runtime_get_sync(&pdev->dev));
 156
 157         err = drm_dev_init(&i915->drm, &mock_driver, &pdev->dev);
 158         if (err) {
 159                 pr_err("Failed to initialise mock GEM device: err=%d\n", err);
 160                 put_device(&pdev->dev);
 161                 kfree(i915);
 162
 163                 return NULL;
 164         }
 165         i915->drm.pdev = pdev;
 166         drmm_add_final_kfree(&i915->drm, i915);
 167
 168         intel_runtime_pm_init_early(&i915->runtime_pm);
 169
 170         /* Using the global GTT may ask questions about KMS users, so prepare */
 171         drm_mode_config_init(&i915->drm);
 172
 173         mkwrite_device_info(i915)->gen = -1;
 174
 175         mkwrite_device_info(i915)->page_sizes =
 176                 I915_GTT_PAGE_SIZE_4K |
 177                 I915_GTT_PAGE_SIZE_64K |
 178                 I915_GTT_PAGE_SIZE_2M;
 179
 180         mkwrite_device_info(i915)->memory_regions = REGION_SMEM;
 181         intel_memory_regions_hw_probe(i915);
 182
 183         mock_uncore_init(&i915->uncore, i915);
 184
 185         i915_gem_init__mm(i915);
 186         intel_gt_init_early(&i915->gt, i915);
 187         atomic_inc(&i915->gt.wakeref.count); /* disable; no hw support */
 188         i915->gt.awake = -ENODEV;
 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         mock_init_ggtt(i915, &i915->ggtt);
 197         i915->gt.vm = i915_vm_get(&i915->ggtt.vm);
 198
 199         mkwrite_device_info(i915)->platform_engine_mask = BIT(0);
 200         i915->gt.info.engine_mask = BIT(0);
 201
 202         i915->gt.engine[RCS0] = mock_engine(i915, "mock", RCS0);
 203         if (!i915->gt.engine[RCS0])
 204                 goto err_unlock;
 205
 206         if (mock_engine_init(i915->gt.engine[RCS0]))
 207                 goto err_context;
 208
 209         __clear_bit(I915_WEDGED, &i915->gt.reset.flags);
 210         intel_engines_driver_register(i915);
 211
 212         i915->do_release = true;
 213
 214         return i915;
 215
 216 err_context:
 217         intel_gt_driver_remove(&i915->gt);
 218 err_unlock:
 219         destroy_workqueue(i915->wq);
 220 err_drv:
 221         intel_gt_driver_late_release(&i915->gt);
 222         intel_memory_regions_driver_release(i915);
 223         drm_mode_config_cleanup(&i915->drm);
 224         drm_dev_put(&i915->drm);
 225
 226         return NULL;
 227 }