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