1 /* 2 * Copyright (C) 2015 Red Hat, Inc. 3 * All Rights Reserved. 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining 6 * a copy of this software and associated documentation files (the 7 * "Software"), to deal in the Software without restriction, including 8 * without limitation the rights to use, copy, modify, merge, publish, 9 * distribute, sublicense, and/or sell copies of the Software, and to 10 * permit persons to whom the Software is furnished to do so, subject to 11 * the following conditions: 12 * 13 * The above copyright notice and this permission notice (including the 14 * next paragraph) shall be included in all copies or substantial 15 * portions of the Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 20 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE 21 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 22 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 23 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 24 */ 25 26 #include <linux/dma-mapping.h> 27 #include <linux/moduleparam.h> 28 29 #include <drm/drm_print.h> 30 31 #include "virtgpu_drv.h" 32 33 static int virtio_gpu_virglrenderer_workaround = 1; 34 module_param_named(virglhack, virtio_gpu_virglrenderer_workaround, int, 0400); 35 36 int virtio_gpu_resource_id_get(struct virtio_gpu_device *vgdev, uint32_t *resid) 37 { 38 if (virtio_gpu_virglrenderer_workaround) { 39 /* 40 * Hack to avoid re-using resource IDs. 41 * 42 * virglrenderer versions up to (and including) 0.7.0 43 * can't deal with that. virglrenderer commit 44 * "f91a9dd35715 Fix unlinking resources from hash 45 * table." (Feb 2019) fixes the bug. 46 */ 47 static atomic_t seqno = ATOMIC_INIT(0); 48 int handle = atomic_inc_return(&seqno); 49 *resid = handle + 1; 50 } else { 51 int handle = ida_alloc(&vgdev->resource_ida, GFP_KERNEL); 52 53 if (handle < 0) 54 return handle; 55 *resid = handle + 1; 56 } 57 return 0; 58 } 59 60 static void virtio_gpu_resource_id_put(struct virtio_gpu_device *vgdev, uint32_t id) 61 { 62 if (!virtio_gpu_virglrenderer_workaround) 63 ida_free(&vgdev->resource_ida, id - 1); 64 } 65 66 void virtio_gpu_remove_from_restore_list(struct virtio_gpu_object *bo) 67 { 68 struct virtio_gpu_device *vgdev = bo->base.base.dev->dev_private; 69 70 mutex_lock(&vgdev->obj_restore_lock); 71 list_del_init(&bo->restore_node); 72 mutex_unlock(&vgdev->obj_restore_lock); 73 } 74 75 void virtio_gpu_cleanup_object(struct virtio_gpu_object *bo) 76 { 77 struct virtio_gpu_device *vgdev = bo->base.base.dev->dev_private; 78 79 virtio_gpu_resource_id_put(vgdev, bo->hw_res_handle); 80 if (virtio_gpu_is_shmem(bo)) { 81 drm_gem_shmem_free(&bo->base); 82 } else if (virtio_gpu_is_vram(bo)) { 83 struct virtio_gpu_object_vram *vram = to_virtio_gpu_vram(bo); 84 85 spin_lock(&vgdev->host_visible_lock); 86 if (drm_mm_node_allocated(&vram->vram_node)) 87 drm_mm_remove_node(&vram->vram_node); 88 89 spin_unlock(&vgdev->host_visible_lock); 90 91 drm_gem_free_mmap_offset(&vram->base.base.base); 92 drm_gem_object_release(&vram->base.base.base); 93 kfree(vram); 94 } else { 95 drm_gem_object_release(&bo->base.base); 96 kfree(bo); 97 } 98 } 99 100 static void virtio_gpu_free_object(struct drm_gem_object *obj) 101 { 102 struct virtio_gpu_object *bo = gem_to_virtio_gpu_obj(obj); 103 struct virtio_gpu_device *vgdev = bo->base.base.dev->dev_private; 104 105 if (bo->created) { 106 virtio_gpu_remove_from_restore_list(bo); 107 virtio_gpu_cmd_unref_resource(vgdev, bo, false); 108 virtio_gpu_notify(vgdev); 109 /* completion handler calls virtio_gpu_cleanup_object() */ 110 return; 111 } 112 virtio_gpu_cleanup_object(bo); 113 } 114 115 int virtio_gpu_detach_object_fenced(struct virtio_gpu_object *bo) 116 { 117 struct virtio_gpu_device *vgdev = bo->base.base.dev->dev_private; 118 struct virtio_gpu_fence *fence; 119 120 if (!bo->attached) 121 return 0; 122 123 fence = virtio_gpu_fence_alloc(vgdev, vgdev->fence_drv.context, 0); 124 if (!fence) 125 return -ENOMEM; 126 127 virtio_gpu_object_detach(vgdev, bo, fence); 128 virtio_gpu_notify(vgdev); 129 130 dma_fence_wait(&fence->f, false); 131 dma_fence_put(&fence->f); 132 133 return 0; 134 } 135 136 static const struct drm_gem_object_funcs virtio_gpu_shmem_funcs = { 137 .free = virtio_gpu_free_object, 138 .open = virtio_gpu_gem_object_open, 139 .close = virtio_gpu_gem_object_close, 140 .print_info = drm_gem_shmem_object_print_info, 141 .export = virtgpu_gem_prime_export, 142 .pin = drm_gem_shmem_object_pin, 143 .unpin = drm_gem_shmem_object_unpin, 144 .get_sg_table = drm_gem_shmem_object_get_sg_table, 145 .vmap = drm_gem_shmem_object_vmap, 146 .vunmap = drm_gem_shmem_object_vunmap, 147 .mmap = drm_gem_shmem_object_mmap, 148 .vm_ops = &drm_gem_shmem_vm_ops, 149 }; 150 151 bool virtio_gpu_is_shmem(struct virtio_gpu_object *bo) 152 { 153 return bo->base.base.funcs == &virtio_gpu_shmem_funcs; 154 } 155 156 struct drm_gem_object *virtio_gpu_create_object(struct drm_device *dev, 157 size_t size) 158 { 159 struct virtio_gpu_object_shmem *shmem; 160 struct drm_gem_shmem_object *dshmem; 161 162 shmem = kzalloc_obj(*shmem); 163 if (!shmem) 164 return ERR_PTR(-ENOMEM); 165 166 dshmem = &shmem->base.base; 167 dshmem->base.funcs = &virtio_gpu_shmem_funcs; 168 return &dshmem->base; 169 } 170 171 static int virtio_gpu_object_shmem_init(struct virtio_gpu_device *vgdev, 172 struct virtio_gpu_object *bo, 173 struct virtio_gpu_mem_entry **ents, 174 unsigned int *nents) 175 { 176 bool use_dma_api = !virtio_has_dma_quirk(vgdev->vdev); 177 struct scatterlist *sg; 178 struct sg_table *pages; 179 int si; 180 181 pages = drm_gem_shmem_get_pages_sgt(&bo->base); 182 if (IS_ERR(pages)) 183 return PTR_ERR(pages); 184 185 if (use_dma_api) 186 *nents = pages->nents; 187 else 188 *nents = pages->orig_nents; 189 190 *ents = kvmalloc_objs(struct virtio_gpu_mem_entry, *nents); 191 if (!(*ents)) { 192 DRM_ERROR("failed to allocate ent list\n"); 193 return -ENOMEM; 194 } 195 196 if (use_dma_api) { 197 for_each_sgtable_dma_sg(pages, sg, si) { 198 (*ents)[si].addr = cpu_to_le64(sg_dma_address(sg)); 199 (*ents)[si].length = cpu_to_le32(sg_dma_len(sg)); 200 (*ents)[si].padding = 0; 201 } 202 } else { 203 for_each_sgtable_sg(pages, sg, si) { 204 (*ents)[si].addr = cpu_to_le64(sg_phys(sg)); 205 (*ents)[si].length = cpu_to_le32(sg->length); 206 (*ents)[si].padding = 0; 207 } 208 } 209 210 return 0; 211 } 212 213 int virtio_gpu_object_create(struct virtio_gpu_device *vgdev, 214 struct virtio_gpu_object_params *params, 215 struct virtio_gpu_object **bo_ptr, 216 struct virtio_gpu_fence *fence) 217 { 218 struct virtio_gpu_object_array *objs = NULL; 219 struct drm_gem_shmem_object *shmem_obj; 220 struct virtio_gpu_object *bo; 221 struct virtio_gpu_mem_entry *ents = NULL; 222 unsigned int nents; 223 int ret; 224 225 *bo_ptr = NULL; 226 227 params->size = roundup(params->size, PAGE_SIZE); 228 shmem_obj = drm_gem_shmem_create(vgdev->ddev, params->size); 229 if (IS_ERR(shmem_obj)) 230 return PTR_ERR(shmem_obj); 231 bo = gem_to_virtio_gpu_obj(&shmem_obj->base); 232 233 INIT_LIST_HEAD(&bo->restore_node); 234 235 ret = virtio_gpu_resource_id_get(vgdev, &bo->hw_res_handle); 236 if (ret < 0) 237 goto err_free_gem; 238 239 bo->dumb = params->dumb; 240 241 ret = virtio_gpu_object_shmem_init(vgdev, bo, &ents, &nents); 242 if (ret != 0) 243 goto err_put_id; 244 245 if (fence) { 246 ret = -ENOMEM; 247 objs = virtio_gpu_array_alloc(1); 248 if (!objs) 249 goto err_free_entry; 250 virtio_gpu_array_add_obj(objs, &bo->base.base); 251 252 ret = virtio_gpu_array_lock_resv(objs); 253 if (ret != 0) 254 goto err_put_objs; 255 } 256 257 if (params->blob) { 258 if (params->blob_mem == VIRTGPU_BLOB_MEM_GUEST) 259 bo->guest_blob = true; 260 261 virtio_gpu_cmd_resource_create_blob(vgdev, bo, params, 262 ents, nents); 263 } else if (params->virgl) { 264 virtio_gpu_cmd_resource_create_3d(vgdev, bo, params, 265 objs, fence); 266 virtio_gpu_object_attach(vgdev, bo, ents, nents); 267 } else { 268 virtio_gpu_cmd_create_resource(vgdev, bo, params, 269 objs, fence); 270 virtio_gpu_object_attach(vgdev, bo, ents, nents); 271 } 272 273 if (!params->virgl) { 274 /* store non-virgl object with its param to the restore list */ 275 bo->params = *params; 276 virtio_gpu_add_object_to_restore_list(vgdev, bo); 277 } 278 279 *bo_ptr = bo; 280 return 0; 281 282 err_put_objs: 283 virtio_gpu_array_put_free(objs); 284 err_free_entry: 285 kvfree(ents); 286 err_put_id: 287 virtio_gpu_resource_id_put(vgdev, bo->hw_res_handle); 288 err_free_gem: 289 drm_gem_shmem_free(shmem_obj); 290 return ret; 291 } 292 293 void virtio_gpu_add_object_to_restore_list(struct virtio_gpu_device *vgdev, 294 struct virtio_gpu_object *bo) 295 { 296 mutex_lock(&vgdev->obj_restore_lock); 297 list_add_tail(&bo->restore_node, &vgdev->obj_restore_list); 298 mutex_unlock(&vgdev->obj_restore_lock); 299 } 300 301 int virtio_gpu_object_restore_all(struct virtio_gpu_device *vgdev) 302 { 303 struct virtio_gpu_object *bo, *tmp; 304 struct virtio_gpu_mem_entry *ents; 305 unsigned int nents; 306 int ret = 0; 307 308 mutex_lock(&vgdev->obj_restore_lock); 309 list_for_each_entry_safe(bo, tmp, &vgdev->obj_restore_list, 310 restore_node) { 311 if (drm_gem_is_imported(&bo->base.base)) { 312 ret = virtgpu_dma_buf_obj_resubmit(vgdev, bo); 313 if (ret) 314 break; 315 316 continue; 317 } 318 319 if (bo->params.blob || bo->attached) { 320 ret = virtio_gpu_object_shmem_init(vgdev, bo, &ents, 321 &nents); 322 if (ret) 323 break; 324 } 325 326 if (bo->params.blob) { 327 virtio_gpu_cmd_resource_create_blob(vgdev, bo, 328 &bo->params, 329 ents, nents); 330 } else { 331 virtio_gpu_cmd_create_resource(vgdev, bo, &bo->params, 332 NULL, NULL); 333 if (bo->attached) { 334 bo->attached = false; 335 virtio_gpu_object_attach(vgdev, bo, ents, 336 nents); 337 } 338 } 339 } 340 mutex_unlock(&vgdev->obj_restore_lock); 341 342 if (ret) 343 DRM_ERROR("failed to restore virtio-gpu objects: %d\n", ret); 344 345 return ret; 346 } 347 348 void virtio_gpu_object_unref_all(struct virtio_gpu_device *vgdev) 349 { 350 struct virtio_gpu_object *bo, *tmp; 351 352 mutex_lock(&vgdev->obj_restore_lock); 353 list_for_each_entry_safe(bo, tmp, &vgdev->obj_restore_list, 354 restore_node) 355 if (bo->created) { 356 virtio_gpu_cmd_unref_resource(vgdev, bo, true); 357 virtio_gpu_notify(vgdev); 358 } 359 360 mutex_unlock(&vgdev->obj_restore_lock); 361 } 362