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 i915_gem_drain_freed_objects(i915); 71 72 mock_fini_ggtt(to_gt(i915)->ggtt); 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] = &i915->gt0; 118 i915->gt[0]->name = "Mock GT"; 119 } 120 121 struct drm_i915_private *mock_gem_device(void) 122 { 123 #if IS_ENABLED(CONFIG_IOMMU_API) && defined(CONFIG_INTEL_IOMMU) 124 static struct dev_iommu fake_iommu = { .priv = (void *)-1 }; 125 #endif 126 struct drm_i915_private *i915; 127 struct pci_dev *pdev; 128 int ret; 129 130 pdev = kzalloc(sizeof(*pdev), GFP_KERNEL); 131 if (!pdev) 132 return NULL; 133 device_initialize(&pdev->dev); 134 pdev->class = PCI_BASE_CLASS_DISPLAY << 16; 135 pdev->dev.release = release_dev; 136 dev_set_name(&pdev->dev, "mock"); 137 dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); 138 139 #if IS_ENABLED(CONFIG_IOMMU_API) && defined(CONFIG_INTEL_IOMMU) 140 /* HACK to disable iommu for the fake device; force identity mapping */ 141 pdev->dev.iommu = &fake_iommu; 142 #endif 143 if (!devres_open_group(&pdev->dev, NULL, GFP_KERNEL)) { 144 put_device(&pdev->dev); 145 return NULL; 146 } 147 148 i915 = devm_drm_dev_alloc(&pdev->dev, &mock_driver, 149 struct drm_i915_private, drm); 150 if (IS_ERR(i915)) { 151 pr_err("Failed to allocate mock GEM device: err=%ld\n", PTR_ERR(i915)); 152 devres_release_group(&pdev->dev, NULL); 153 put_device(&pdev->dev); 154 155 return NULL; 156 } 157 158 pci_set_drvdata(pdev, i915); 159 160 dev_pm_domain_set(&pdev->dev, &pm_domain); 161 pm_runtime_enable(&pdev->dev); 162 pm_runtime_dont_use_autosuspend(&pdev->dev); 163 if (pm_runtime_enabled(&pdev->dev)) 164 WARN_ON(pm_runtime_get_sync(&pdev->dev)); 165 166 167 i915_params_copy(&i915->params, &i915_modparams); 168 169 intel_runtime_pm_init_early(&i915->runtime_pm); 170 /* wakeref tracking has significant overhead */ 171 i915->runtime_pm.no_wakeref_tracking = true; 172 173 /* Using the global GTT may ask questions about KMS users, so prepare */ 174 drm_mode_config_init(&i915->drm); 175 176 RUNTIME_INFO(i915)->graphics.ip.ver = -1; 177 178 RUNTIME_INFO(i915)->page_sizes = 179 I915_GTT_PAGE_SIZE_4K | 180 I915_GTT_PAGE_SIZE_64K | 181 I915_GTT_PAGE_SIZE_2M; 182 183 RUNTIME_INFO(i915)->memory_regions = REGION_SMEM; 184 intel_memory_regions_hw_probe(i915); 185 186 spin_lock_init(&i915->gpu_error.lock); 187 188 i915_gem_init__mm(i915); 189 intel_root_gt_init_early(i915); 190 mock_uncore_init(&i915->uncore, i915); 191 atomic_inc(&to_gt(i915)->wakeref.count); /* disable; no hw support */ 192 to_gt(i915)->awake = -ENODEV; 193 mock_gt_probe(i915); 194 195 ret = intel_region_ttm_device_init(i915); 196 if (ret) 197 goto err_ttm; 198 199 i915->wq = alloc_ordered_workqueue("mock", 0); 200 if (!i915->wq) 201 goto err_drv; 202 203 mock_init_contexts(i915); 204 205 /* allocate the ggtt */ 206 ret = intel_gt_assign_ggtt(to_gt(i915)); 207 if (ret) 208 goto err_unlock; 209 210 mock_init_ggtt(to_gt(i915)); 211 to_gt(i915)->vm = i915_vm_get(&to_gt(i915)->ggtt->vm); 212 213 RUNTIME_INFO(i915)->platform_engine_mask = BIT(0); 214 to_gt(i915)->info.engine_mask = BIT(0); 215 216 to_gt(i915)->engine[RCS0] = mock_engine(i915, "mock", RCS0); 217 if (!to_gt(i915)->engine[RCS0]) 218 goto err_unlock; 219 220 if (mock_engine_init(to_gt(i915)->engine[RCS0])) 221 goto err_context; 222 223 __clear_bit(I915_WEDGED, &to_gt(i915)->reset.flags); 224 intel_engines_driver_register(i915); 225 226 i915->do_release = true; 227 ida_init(&i915->selftest.mock_region_instances); 228 229 return i915; 230 231 err_context: 232 intel_gt_driver_remove(to_gt(i915)); 233 err_unlock: 234 destroy_workqueue(i915->wq); 235 err_drv: 236 intel_region_ttm_device_fini(i915); 237 err_ttm: 238 intel_gt_driver_late_release_all(i915); 239 intel_memory_regions_driver_release(i915); 240 drm_mode_config_cleanup(&i915->drm); 241 mock_destroy_device(i915); 242 243 return NULL; 244 } 245 246 void mock_destroy_device(struct drm_i915_private *i915) 247 { 248 struct device *dev = i915->drm.dev; 249 250 devres_release_group(dev, NULL); 251 put_device(dev); 252 } 253