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 71 mock_fini_ggtt(to_gt(i915)->ggtt); 72 destroy_workqueue(i915->unordered_wq); 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]->name = "Mock GT"; 118 } 119 120 static const struct intel_device_info mock_info = { 121 .__runtime.graphics.ip.ver = -1, 122 .__runtime.page_sizes = (I915_GTT_PAGE_SIZE_4K | 123 I915_GTT_PAGE_SIZE_64K | 124 I915_GTT_PAGE_SIZE_2M), 125 .memory_regions = BIT(INTEL_REGION_SMEM), 126 .platform_engine_mask = BIT(0), 127 128 /* simply use legacy cache level for mock device */ 129 .max_pat_index = 3, 130 .cachelevel_to_pat = { 131 [I915_CACHE_NONE] = 0, 132 [I915_CACHE_LLC] = 1, 133 [I915_CACHE_L3_LLC] = 2, 134 [I915_CACHE_WT] = 3, 135 }, 136 }; 137 138 struct drm_i915_private *mock_gem_device(void) 139 { 140 #if IS_ENABLED(CONFIG_IOMMU_API) && IS_ENABLED(CONFIG_INTEL_IOMMU) 141 static struct dev_iommu fake_iommu = { .priv = (void *)-1 }; 142 #endif 143 struct drm_i915_private *i915; 144 struct pci_dev *pdev; 145 int ret; 146 147 pdev = kzalloc(sizeof(*pdev), GFP_KERNEL); 148 if (!pdev) 149 return NULL; 150 device_initialize(&pdev->dev); 151 pdev->class = PCI_BASE_CLASS_DISPLAY << 16; 152 pdev->dev.release = release_dev; 153 dev_set_name(&pdev->dev, "mock"); 154 dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); 155 156 #if IS_ENABLED(CONFIG_IOMMU_API) && IS_ENABLED(CONFIG_INTEL_IOMMU) 157 /* HACK to disable iommu for the fake device; force identity mapping */ 158 pdev->dev.iommu = &fake_iommu; 159 #endif 160 if (!devres_open_group(&pdev->dev, NULL, GFP_KERNEL)) { 161 put_device(&pdev->dev); 162 return NULL; 163 } 164 165 i915 = devm_drm_dev_alloc(&pdev->dev, &mock_driver, 166 struct drm_i915_private, drm); 167 if (IS_ERR(i915)) { 168 pr_err("Failed to allocate mock GEM device: err=%ld\n", PTR_ERR(i915)); 169 devres_release_group(&pdev->dev, NULL); 170 put_device(&pdev->dev); 171 172 return NULL; 173 } 174 175 pci_set_drvdata(pdev, &i915->drm); 176 177 /* Device parameters start as a copy of module parameters. */ 178 i915_params_copy(&i915->params, &i915_modparams); 179 180 /* Set up device info and initial runtime info. */ 181 intel_device_info_driver_create(i915, pdev->device, &mock_info); 182 183 intel_display_device_probe(i915); 184 185 dev_pm_domain_set(&pdev->dev, &pm_domain); 186 pm_runtime_enable(&pdev->dev); 187 pm_runtime_dont_use_autosuspend(&pdev->dev); 188 if (pm_runtime_enabled(&pdev->dev)) 189 WARN_ON(pm_runtime_get_sync(&pdev->dev)); 190 191 intel_runtime_pm_init_early(&i915->runtime_pm); 192 /* wakeref tracking has significant overhead */ 193 i915->runtime_pm.no_wakeref_tracking = true; 194 195 /* Using the global GTT may ask questions about KMS users, so prepare */ 196 drm_mode_config_init(&i915->drm); 197 198 intel_memory_regions_hw_probe(i915); 199 200 spin_lock_init(&i915->gpu_error.lock); 201 202 i915_gem_init__mm(i915); 203 intel_root_gt_init_early(i915); 204 mock_uncore_init(&i915->uncore, i915); 205 atomic_inc(&to_gt(i915)->wakeref.count); /* disable; no hw support */ 206 to_gt(i915)->awake = INTEL_WAKEREF_MOCK_GT; 207 mock_gt_probe(i915); 208 209 ret = intel_region_ttm_device_init(i915); 210 if (ret) 211 goto err_ttm; 212 213 i915->wq = alloc_ordered_workqueue("mock", 0); 214 if (!i915->wq) 215 goto err_drv; 216 217 i915->unordered_wq = alloc_workqueue("mock-unordered", 0, 0); 218 if (!i915->unordered_wq) 219 goto err_wq; 220 221 mock_init_contexts(i915); 222 223 /* allocate the ggtt */ 224 ret = intel_gt_assign_ggtt(to_gt(i915)); 225 if (ret) 226 goto err_unlock; 227 228 mock_init_ggtt(to_gt(i915)); 229 to_gt(i915)->vm = i915_vm_get(&to_gt(i915)->ggtt->vm); 230 231 to_gt(i915)->info.engine_mask = BIT(0); 232 233 to_gt(i915)->engine[RCS0] = mock_engine(i915, "mock", RCS0); 234 if (!to_gt(i915)->engine[RCS0]) 235 goto err_unlock; 236 237 if (mock_engine_init(to_gt(i915)->engine[RCS0])) 238 goto err_context; 239 240 __clear_bit(I915_WEDGED, &to_gt(i915)->reset.flags); 241 intel_engines_driver_register(i915); 242 243 i915->do_release = true; 244 ida_init(&i915->selftest.mock_region_instances); 245 246 return i915; 247 248 err_context: 249 intel_gt_driver_remove(to_gt(i915)); 250 err_unlock: 251 destroy_workqueue(i915->unordered_wq); 252 err_wq: 253 destroy_workqueue(i915->wq); 254 err_drv: 255 intel_region_ttm_device_fini(i915); 256 err_ttm: 257 intel_gt_driver_late_release_all(i915); 258 intel_memory_regions_driver_release(i915); 259 drm_mode_config_cleanup(&i915->drm); 260 mock_destroy_device(i915); 261 262 return NULL; 263 } 264 265 void mock_destroy_device(struct drm_i915_private *i915) 266 { 267 struct device *dev = i915->drm.dev; 268 269 devres_release_group(dev, NULL); 270 put_device(dev); 271 } 272