1 /* 2 * Copyright 2013 Red Hat Inc. 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 shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 20 * OTHER DEALINGS IN THE SOFTWARE. 21 * 22 * Authors: Dave Airlie 23 * Alon Levy 24 */ 25 26 #include <ttm/ttm_bo_api.h> 27 #include <ttm/ttm_bo_driver.h> 28 #include <ttm/ttm_placement.h> 29 #include <ttm/ttm_page_alloc.h> 30 #include <ttm/ttm_module.h> 31 #include <drm/drmP.h> 32 #include <drm/drm.h> 33 #include <drm/qxl_drm.h> 34 #include "qxl_drv.h" 35 #include "qxl_object.h" 36 37 #include <linux/delay.h> 38 39 static struct qxl_device *qxl_get_qdev(struct ttm_bo_device *bdev) 40 { 41 struct qxl_mman *mman; 42 struct qxl_device *qdev; 43 44 mman = container_of(bdev, struct qxl_mman, bdev); 45 qdev = container_of(mman, struct qxl_device, mman); 46 return qdev; 47 } 48 49 static int qxl_ttm_mem_global_init(struct drm_global_reference *ref) 50 { 51 return ttm_mem_global_init(ref->object); 52 } 53 54 static void qxl_ttm_mem_global_release(struct drm_global_reference *ref) 55 { 56 ttm_mem_global_release(ref->object); 57 } 58 59 static int qxl_ttm_global_init(struct qxl_device *qdev) 60 { 61 struct drm_global_reference *global_ref; 62 int r; 63 64 qdev->mman.mem_global_referenced = false; 65 global_ref = &qdev->mman.mem_global_ref; 66 global_ref->global_type = DRM_GLOBAL_TTM_MEM; 67 global_ref->size = sizeof(struct ttm_mem_global); 68 global_ref->init = &qxl_ttm_mem_global_init; 69 global_ref->release = &qxl_ttm_mem_global_release; 70 71 r = drm_global_item_ref(global_ref); 72 if (r != 0) { 73 DRM_ERROR("Failed setting up TTM memory accounting " 74 "subsystem.\n"); 75 return r; 76 } 77 78 qdev->mman.bo_global_ref.mem_glob = 79 qdev->mman.mem_global_ref.object; 80 global_ref = &qdev->mman.bo_global_ref.ref; 81 global_ref->global_type = DRM_GLOBAL_TTM_BO; 82 global_ref->size = sizeof(struct ttm_bo_global); 83 global_ref->init = &ttm_bo_global_init; 84 global_ref->release = &ttm_bo_global_release; 85 r = drm_global_item_ref(global_ref); 86 if (r != 0) { 87 DRM_ERROR("Failed setting up TTM BO subsystem.\n"); 88 drm_global_item_unref(&qdev->mman.mem_global_ref); 89 return r; 90 } 91 92 qdev->mman.mem_global_referenced = true; 93 return 0; 94 } 95 96 static void qxl_ttm_global_fini(struct qxl_device *qdev) 97 { 98 if (qdev->mman.mem_global_referenced) { 99 drm_global_item_unref(&qdev->mman.bo_global_ref.ref); 100 drm_global_item_unref(&qdev->mman.mem_global_ref); 101 qdev->mman.mem_global_referenced = false; 102 } 103 } 104 105 static struct vm_operations_struct qxl_ttm_vm_ops; 106 static const struct vm_operations_struct *ttm_vm_ops; 107 108 static int qxl_ttm_fault(struct vm_fault *vmf) 109 { 110 struct ttm_buffer_object *bo; 111 int r; 112 113 bo = (struct ttm_buffer_object *)vmf->vma->vm_private_data; 114 if (bo == NULL) 115 return VM_FAULT_NOPAGE; 116 r = ttm_vm_ops->fault(vmf); 117 return r; 118 } 119 120 int qxl_mmap(struct file *filp, struct vm_area_struct *vma) 121 { 122 struct drm_file *file_priv; 123 struct qxl_device *qdev; 124 int r; 125 126 if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET)) { 127 pr_info("%s: vma->vm_pgoff (%ld) < DRM_FILE_PAGE_OFFSET\n", 128 __func__, vma->vm_pgoff); 129 return -EINVAL; 130 } 131 132 file_priv = filp->private_data; 133 qdev = file_priv->minor->dev->dev_private; 134 if (qdev == NULL) { 135 DRM_ERROR( 136 "filp->private_data->minor->dev->dev_private == NULL\n"); 137 return -EINVAL; 138 } 139 QXL_INFO(qdev, "%s: filp->private_data = 0x%p, vma->vm_pgoff = %lx\n", 140 __func__, filp->private_data, vma->vm_pgoff); 141 142 r = ttm_bo_mmap(filp, vma, &qdev->mman.bdev); 143 if (unlikely(r != 0)) 144 return r; 145 if (unlikely(ttm_vm_ops == NULL)) { 146 ttm_vm_ops = vma->vm_ops; 147 qxl_ttm_vm_ops = *ttm_vm_ops; 148 qxl_ttm_vm_ops.fault = &qxl_ttm_fault; 149 } 150 vma->vm_ops = &qxl_ttm_vm_ops; 151 return 0; 152 } 153 154 static int qxl_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags) 155 { 156 return 0; 157 } 158 159 static int qxl_init_mem_type(struct ttm_bo_device *bdev, uint32_t type, 160 struct ttm_mem_type_manager *man) 161 { 162 switch (type) { 163 case TTM_PL_SYSTEM: 164 /* System memory */ 165 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE; 166 man->available_caching = TTM_PL_MASK_CACHING; 167 man->default_caching = TTM_PL_FLAG_CACHED; 168 break; 169 case TTM_PL_VRAM: 170 case TTM_PL_PRIV: 171 /* "On-card" video ram */ 172 man->func = &ttm_bo_manager_func; 173 man->gpu_offset = 0; 174 man->flags = TTM_MEMTYPE_FLAG_FIXED | 175 TTM_MEMTYPE_FLAG_MAPPABLE; 176 man->available_caching = TTM_PL_MASK_CACHING; 177 man->default_caching = TTM_PL_FLAG_CACHED; 178 break; 179 default: 180 DRM_ERROR("Unsupported memory type %u\n", (unsigned)type); 181 return -EINVAL; 182 } 183 return 0; 184 } 185 186 static void qxl_evict_flags(struct ttm_buffer_object *bo, 187 struct ttm_placement *placement) 188 { 189 struct qxl_bo *qbo; 190 static struct ttm_place placements = { 191 .fpfn = 0, 192 .lpfn = 0, 193 .flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM 194 }; 195 196 if (!qxl_ttm_bo_is_qxl_bo(bo)) { 197 placement->placement = &placements; 198 placement->busy_placement = &placements; 199 placement->num_placement = 1; 200 placement->num_busy_placement = 1; 201 return; 202 } 203 qbo = to_qxl_bo(bo); 204 qxl_ttm_placement_from_domain(qbo, QXL_GEM_DOMAIN_CPU, false); 205 *placement = qbo->placement; 206 } 207 208 static int qxl_verify_access(struct ttm_buffer_object *bo, struct file *filp) 209 { 210 struct qxl_bo *qbo = to_qxl_bo(bo); 211 212 return drm_vma_node_verify_access(&qbo->gem_base.vma_node, 213 filp->private_data); 214 } 215 216 static int qxl_ttm_io_mem_reserve(struct ttm_bo_device *bdev, 217 struct ttm_mem_reg *mem) 218 { 219 struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; 220 struct qxl_device *qdev = qxl_get_qdev(bdev); 221 222 mem->bus.addr = NULL; 223 mem->bus.offset = 0; 224 mem->bus.size = mem->num_pages << PAGE_SHIFT; 225 mem->bus.base = 0; 226 mem->bus.is_iomem = false; 227 if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE)) 228 return -EINVAL; 229 switch (mem->mem_type) { 230 case TTM_PL_SYSTEM: 231 /* system memory */ 232 return 0; 233 case TTM_PL_VRAM: 234 mem->bus.is_iomem = true; 235 mem->bus.base = qdev->vram_base; 236 mem->bus.offset = mem->start << PAGE_SHIFT; 237 break; 238 case TTM_PL_PRIV: 239 mem->bus.is_iomem = true; 240 mem->bus.base = qdev->surfaceram_base; 241 mem->bus.offset = mem->start << PAGE_SHIFT; 242 break; 243 default: 244 return -EINVAL; 245 } 246 return 0; 247 } 248 249 static void qxl_ttm_io_mem_free(struct ttm_bo_device *bdev, 250 struct ttm_mem_reg *mem) 251 { 252 } 253 254 /* 255 * TTM backend functions. 256 */ 257 struct qxl_ttm_tt { 258 struct ttm_dma_tt ttm; 259 struct qxl_device *qdev; 260 u64 offset; 261 }; 262 263 static int qxl_ttm_backend_bind(struct ttm_tt *ttm, 264 struct ttm_mem_reg *bo_mem) 265 { 266 struct qxl_ttm_tt *gtt = (void *)ttm; 267 268 gtt->offset = (unsigned long)(bo_mem->start << PAGE_SHIFT); 269 if (!ttm->num_pages) { 270 WARN(1, "nothing to bind %lu pages for mreg %p back %p!\n", 271 ttm->num_pages, bo_mem, ttm); 272 } 273 /* Not implemented */ 274 return -1; 275 } 276 277 static int qxl_ttm_backend_unbind(struct ttm_tt *ttm) 278 { 279 /* Not implemented */ 280 return -1; 281 } 282 283 static void qxl_ttm_backend_destroy(struct ttm_tt *ttm) 284 { 285 struct qxl_ttm_tt *gtt = (void *)ttm; 286 287 ttm_dma_tt_fini(>t->ttm); 288 kfree(gtt); 289 } 290 291 static struct ttm_backend_func qxl_backend_func = { 292 .bind = &qxl_ttm_backend_bind, 293 .unbind = &qxl_ttm_backend_unbind, 294 .destroy = &qxl_ttm_backend_destroy, 295 }; 296 297 static int qxl_ttm_tt_populate(struct ttm_tt *ttm) 298 { 299 int r; 300 301 if (ttm->state != tt_unpopulated) 302 return 0; 303 304 r = ttm_pool_populate(ttm); 305 if (r) 306 return r; 307 308 return 0; 309 } 310 311 static void qxl_ttm_tt_unpopulate(struct ttm_tt *ttm) 312 { 313 ttm_pool_unpopulate(ttm); 314 } 315 316 static struct ttm_tt *qxl_ttm_tt_create(struct ttm_bo_device *bdev, 317 unsigned long size, uint32_t page_flags, 318 struct page *dummy_read_page) 319 { 320 struct qxl_device *qdev; 321 struct qxl_ttm_tt *gtt; 322 323 qdev = qxl_get_qdev(bdev); 324 gtt = kzalloc(sizeof(struct qxl_ttm_tt), GFP_KERNEL); 325 if (gtt == NULL) 326 return NULL; 327 gtt->ttm.ttm.func = &qxl_backend_func; 328 gtt->qdev = qdev; 329 if (ttm_dma_tt_init(>t->ttm, bdev, size, page_flags, 330 dummy_read_page)) { 331 kfree(gtt); 332 return NULL; 333 } 334 return >t->ttm.ttm; 335 } 336 337 static void qxl_move_null(struct ttm_buffer_object *bo, 338 struct ttm_mem_reg *new_mem) 339 { 340 struct ttm_mem_reg *old_mem = &bo->mem; 341 342 BUG_ON(old_mem->mm_node != NULL); 343 *old_mem = *new_mem; 344 new_mem->mm_node = NULL; 345 } 346 347 static int qxl_bo_move(struct ttm_buffer_object *bo, 348 bool evict, bool interruptible, 349 bool no_wait_gpu, 350 struct ttm_mem_reg *new_mem) 351 { 352 struct ttm_mem_reg *old_mem = &bo->mem; 353 int ret; 354 355 ret = ttm_bo_wait(bo, interruptible, no_wait_gpu); 356 if (ret) 357 return ret; 358 359 360 if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) { 361 qxl_move_null(bo, new_mem); 362 return 0; 363 } 364 return ttm_bo_move_memcpy(bo, interruptible, no_wait_gpu, 365 new_mem); 366 } 367 368 static void qxl_bo_move_notify(struct ttm_buffer_object *bo, 369 bool evict, 370 struct ttm_mem_reg *new_mem) 371 { 372 struct qxl_bo *qbo; 373 struct qxl_device *qdev; 374 375 if (!qxl_ttm_bo_is_qxl_bo(bo)) 376 return; 377 qbo = to_qxl_bo(bo); 378 qdev = qbo->gem_base.dev->dev_private; 379 380 if (bo->mem.mem_type == TTM_PL_PRIV && qbo->surface_id) 381 qxl_surface_evict(qdev, qbo, new_mem ? true : false); 382 } 383 384 static struct ttm_bo_driver qxl_bo_driver = { 385 .ttm_tt_create = &qxl_ttm_tt_create, 386 .ttm_tt_populate = &qxl_ttm_tt_populate, 387 .ttm_tt_unpopulate = &qxl_ttm_tt_unpopulate, 388 .invalidate_caches = &qxl_invalidate_caches, 389 .init_mem_type = &qxl_init_mem_type, 390 .eviction_valuable = ttm_bo_eviction_valuable, 391 .evict_flags = &qxl_evict_flags, 392 .move = &qxl_bo_move, 393 .verify_access = &qxl_verify_access, 394 .io_mem_reserve = &qxl_ttm_io_mem_reserve, 395 .io_mem_free = &qxl_ttm_io_mem_free, 396 .move_notify = &qxl_bo_move_notify, 397 }; 398 399 int qxl_ttm_init(struct qxl_device *qdev) 400 { 401 int r; 402 int num_io_pages; /* != rom->num_io_pages, we include surface0 */ 403 404 r = qxl_ttm_global_init(qdev); 405 if (r) 406 return r; 407 /* No others user of address space so set it to 0 */ 408 r = ttm_bo_device_init(&qdev->mman.bdev, 409 qdev->mman.bo_global_ref.ref.object, 410 &qxl_bo_driver, 411 qdev->ddev.anon_inode->i_mapping, 412 DRM_FILE_PAGE_OFFSET, 0); 413 if (r) { 414 DRM_ERROR("failed initializing buffer object driver(%d).\n", r); 415 return r; 416 } 417 /* NOTE: this includes the framebuffer (aka surface 0) */ 418 num_io_pages = qdev->rom->ram_header_offset / PAGE_SIZE; 419 r = ttm_bo_init_mm(&qdev->mman.bdev, TTM_PL_VRAM, 420 num_io_pages); 421 if (r) { 422 DRM_ERROR("Failed initializing VRAM heap.\n"); 423 return r; 424 } 425 r = ttm_bo_init_mm(&qdev->mman.bdev, TTM_PL_PRIV, 426 qdev->surfaceram_size / PAGE_SIZE); 427 if (r) { 428 DRM_ERROR("Failed initializing Surfaces heap.\n"); 429 return r; 430 } 431 DRM_INFO("qxl: %uM of VRAM memory size\n", 432 (unsigned)qdev->vram_size / (1024 * 1024)); 433 DRM_INFO("qxl: %luM of IO pages memory ready (VRAM domain)\n", 434 ((unsigned)num_io_pages * PAGE_SIZE) / (1024 * 1024)); 435 DRM_INFO("qxl: %uM of Surface memory size\n", 436 (unsigned)qdev->surfaceram_size / (1024 * 1024)); 437 return 0; 438 } 439 440 void qxl_ttm_fini(struct qxl_device *qdev) 441 { 442 ttm_bo_clean_mm(&qdev->mman.bdev, TTM_PL_VRAM); 443 ttm_bo_clean_mm(&qdev->mman.bdev, TTM_PL_PRIV); 444 ttm_bo_device_release(&qdev->mman.bdev); 445 qxl_ttm_global_fini(qdev); 446 DRM_INFO("qxl: ttm finalized\n"); 447 } 448 449 450 #define QXL_DEBUGFS_MEM_TYPES 2 451 452 #if defined(CONFIG_DEBUG_FS) 453 static int qxl_mm_dump_table(struct seq_file *m, void *data) 454 { 455 struct drm_info_node *node = (struct drm_info_node *)m->private; 456 struct drm_mm *mm = (struct drm_mm *)node->info_ent->data; 457 struct drm_device *dev = node->minor->dev; 458 struct qxl_device *rdev = dev->dev_private; 459 struct ttm_bo_global *glob = rdev->mman.bdev.glob; 460 struct drm_printer p = drm_seq_file_printer(m); 461 462 spin_lock(&glob->lru_lock); 463 drm_mm_print(mm, &p); 464 spin_unlock(&glob->lru_lock); 465 return 0; 466 } 467 #endif 468 469 int qxl_ttm_debugfs_init(struct qxl_device *qdev) 470 { 471 #if defined(CONFIG_DEBUG_FS) 472 static struct drm_info_list qxl_mem_types_list[QXL_DEBUGFS_MEM_TYPES]; 473 static char qxl_mem_types_names[QXL_DEBUGFS_MEM_TYPES][32]; 474 unsigned i; 475 476 for (i = 0; i < QXL_DEBUGFS_MEM_TYPES; i++) { 477 if (i == 0) 478 sprintf(qxl_mem_types_names[i], "qxl_mem_mm"); 479 else 480 sprintf(qxl_mem_types_names[i], "qxl_surf_mm"); 481 qxl_mem_types_list[i].name = qxl_mem_types_names[i]; 482 qxl_mem_types_list[i].show = &qxl_mm_dump_table; 483 qxl_mem_types_list[i].driver_features = 0; 484 if (i == 0) 485 qxl_mem_types_list[i].data = qdev->mman.bdev.man[TTM_PL_VRAM].priv; 486 else 487 qxl_mem_types_list[i].data = qdev->mman.bdev.man[TTM_PL_PRIV].priv; 488 489 } 490 return qxl_debugfs_add_files(qdev, qxl_mem_types_list, i); 491 #else 492 return 0; 493 #endif 494 } 495