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 = &i915->gt; 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 } 57 58 static void mock_device_release(struct drm_device *dev) 59 { 60 struct drm_i915_private *i915 = to_i915(dev); 61 62 if (!i915->do_release) 63 goto out; 64 65 mock_device_flush(i915); 66 intel_gt_driver_remove(&i915->gt); 67 68 i915_gem_drain_workqueue(i915); 69 i915_gem_drain_freed_objects(i915); 70 71 mock_fini_ggtt(&i915->ggtt); 72 destroy_workqueue(i915->wq); 73 74 intel_region_ttm_device_fini(i915); 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 const struct drm_driver mock_driver = { 85 .name = "mock", 86 .driver_features = DRIVER_GEM, 87 .release = mock_device_release, 88 }; 89 90 static void release_dev(struct device *dev) 91 { 92 struct pci_dev *pdev = to_pci_dev(dev); 93 94 kfree(pdev); 95 } 96 97 static int pm_domain_resume(struct device *dev) 98 { 99 return pm_generic_runtime_resume(dev); 100 } 101 102 static int pm_domain_suspend(struct device *dev) 103 { 104 return pm_generic_runtime_suspend(dev); 105 } 106 107 static struct dev_pm_domain pm_domain = { 108 .ops = { 109 .runtime_suspend = pm_domain_suspend, 110 .runtime_resume = pm_domain_resume, 111 }, 112 }; 113 114 struct drm_i915_private *mock_gem_device(void) 115 { 116 #if IS_ENABLED(CONFIG_IOMMU_API) && defined(CONFIG_INTEL_IOMMU) 117 static struct dev_iommu fake_iommu = { .priv = (void *)-1 }; 118 #endif 119 struct drm_i915_private *i915; 120 struct pci_dev *pdev; 121 int ret; 122 123 pdev = kzalloc(sizeof(*pdev), GFP_KERNEL); 124 if (!pdev) 125 return NULL; 126 device_initialize(&pdev->dev); 127 pdev->class = PCI_BASE_CLASS_DISPLAY << 16; 128 pdev->dev.release = release_dev; 129 dev_set_name(&pdev->dev, "mock"); 130 dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); 131 132 #if IS_ENABLED(CONFIG_IOMMU_API) && defined(CONFIG_INTEL_IOMMU) 133 /* HACK to disable iommu for the fake device; force identity mapping */ 134 pdev->dev.iommu = &fake_iommu; 135 #endif 136 if (!devres_open_group(&pdev->dev, NULL, GFP_KERNEL)) { 137 put_device(&pdev->dev); 138 return NULL; 139 } 140 141 i915 = devm_drm_dev_alloc(&pdev->dev, &mock_driver, 142 struct drm_i915_private, drm); 143 if (IS_ERR(i915)) { 144 pr_err("Failed to allocate mock GEM device: err=%ld\n", PTR_ERR(i915)); 145 devres_release_group(&pdev->dev, NULL); 146 put_device(&pdev->dev); 147 148 return NULL; 149 } 150 151 pci_set_drvdata(pdev, i915); 152 153 dev_pm_domain_set(&pdev->dev, &pm_domain); 154 pm_runtime_enable(&pdev->dev); 155 pm_runtime_dont_use_autosuspend(&pdev->dev); 156 if (pm_runtime_enabled(&pdev->dev)) 157 WARN_ON(pm_runtime_get_sync(&pdev->dev)); 158 159 160 i915_params_copy(&i915->params, &i915_modparams); 161 162 intel_runtime_pm_init_early(&i915->runtime_pm); 163 164 /* Using the global GTT may ask questions about KMS users, so prepare */ 165 drm_mode_config_init(&i915->drm); 166 167 mkwrite_device_info(i915)->graphics_ver = -1; 168 169 mkwrite_device_info(i915)->page_sizes = 170 I915_GTT_PAGE_SIZE_4K | 171 I915_GTT_PAGE_SIZE_64K | 172 I915_GTT_PAGE_SIZE_2M; 173 174 mkwrite_device_info(i915)->memory_regions = REGION_SMEM; 175 intel_memory_regions_hw_probe(i915); 176 177 mock_uncore_init(&i915->uncore, i915); 178 179 i915_gem_init__mm(i915); 180 intel_gt_init_early(&i915->gt, i915); 181 atomic_inc(&i915->gt.wakeref.count); /* disable; no hw support */ 182 i915->gt.awake = -ENODEV; 183 184 ret = intel_region_ttm_device_init(i915); 185 if (ret) 186 goto err_ttm; 187 188 i915->wq = alloc_ordered_workqueue("mock", 0); 189 if (!i915->wq) 190 goto err_drv; 191 192 mock_init_contexts(i915); 193 194 mock_init_ggtt(i915, &i915->ggtt); 195 i915->gt.vm = i915_vm_get(&i915->ggtt.vm); 196 197 mkwrite_device_info(i915)->platform_engine_mask = BIT(0); 198 i915->gt.info.engine_mask = BIT(0); 199 200 i915->gt.engine[RCS0] = mock_engine(i915, "mock", RCS0); 201 if (!i915->gt.engine[RCS0]) 202 goto err_unlock; 203 204 if (mock_engine_init(i915->gt.engine[RCS0])) 205 goto err_context; 206 207 __clear_bit(I915_WEDGED, &i915->gt.reset.flags); 208 intel_engines_driver_register(i915); 209 210 i915->do_release = true; 211 ida_init(&i915->selftest.mock_region_instances); 212 213 return i915; 214 215 err_context: 216 intel_gt_driver_remove(&i915->gt); 217 err_unlock: 218 destroy_workqueue(i915->wq); 219 err_drv: 220 intel_region_ttm_device_fini(i915); 221 err_ttm: 222 intel_gt_driver_late_release(&i915->gt); 223 intel_memory_regions_driver_release(i915); 224 drm_mode_config_cleanup(&i915->drm); 225 mock_destroy_device(i915); 226 227 return NULL; 228 } 229 230 void mock_destroy_device(struct drm_i915_private *i915) 231 { 232 struct device *dev = i915->drm.dev; 233 234 devres_release_group(dev, NULL); 235 put_device(dev); 236 } 237