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 static int qxl_ttm_debugfs_init(struct qxl_device *qdev); 39 40 static struct qxl_device *qxl_get_qdev(struct ttm_bo_device *bdev) 41 { 42 struct qxl_mman *mman; 43 struct qxl_device *qdev; 44 45 mman = container_of(bdev, struct qxl_mman, bdev); 46 qdev = container_of(mman, struct qxl_device, mman); 47 return qdev; 48 } 49 50 static int qxl_ttm_mem_global_init(struct drm_global_reference *ref) 51 { 52 return ttm_mem_global_init(ref->object); 53 } 54 55 static void qxl_ttm_mem_global_release(struct drm_global_reference *ref) 56 { 57 ttm_mem_global_release(ref->object); 58 } 59 60 static int qxl_ttm_global_init(struct qxl_device *qdev) 61 { 62 struct drm_global_reference *global_ref; 63 int r; 64 65 qdev->mman.mem_global_referenced = false; 66 global_ref = &qdev->mman.mem_global_ref; 67 global_ref->global_type = DRM_GLOBAL_TTM_MEM; 68 global_ref->size = sizeof(struct ttm_mem_global); 69 global_ref->init = &qxl_ttm_mem_global_init; 70 global_ref->release = &qxl_ttm_mem_global_release; 71 72 r = drm_global_item_ref(global_ref); 73 if (r != 0) { 74 DRM_ERROR("Failed setting up TTM memory accounting " 75 "subsystem.\n"); 76 return r; 77 } 78 79 qdev->mman.bo_global_ref.mem_glob = 80 qdev->mman.mem_global_ref.object; 81 global_ref = &qdev->mman.bo_global_ref.ref; 82 global_ref->global_type = DRM_GLOBAL_TTM_BO; 83 global_ref->size = sizeof(struct ttm_bo_global); 84 global_ref->init = &ttm_bo_global_init; 85 global_ref->release = &ttm_bo_global_release; 86 r = drm_global_item_ref(global_ref); 87 if (r != 0) { 88 DRM_ERROR("Failed setting up TTM BO subsystem.\n"); 89 drm_global_item_unref(&qdev->mman.mem_global_ref); 90 return r; 91 } 92 93 qdev->mman.mem_global_referenced = true; 94 return 0; 95 } 96 97 static void qxl_ttm_global_fini(struct qxl_device *qdev) 98 { 99 if (qdev->mman.mem_global_referenced) { 100 drm_global_item_unref(&qdev->mman.bo_global_ref.ref); 101 drm_global_item_unref(&qdev->mman.mem_global_ref); 102 qdev->mman.mem_global_referenced = false; 103 } 104 } 105 106 static struct vm_operations_struct qxl_ttm_vm_ops; 107 static const struct vm_operations_struct *ttm_vm_ops; 108 109 static int qxl_ttm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) 110 { 111 struct ttm_buffer_object *bo; 112 struct qxl_device *qdev; 113 int r; 114 115 bo = (struct ttm_buffer_object *)vma->vm_private_data; 116 if (bo == NULL) 117 return VM_FAULT_NOPAGE; 118 qdev = qxl_get_qdev(bo->bdev); 119 r = ttm_vm_ops->fault(vma, vmf); 120 return r; 121 } 122 123 int qxl_mmap(struct file *filp, struct vm_area_struct *vma) 124 { 125 struct drm_file *file_priv; 126 struct qxl_device *qdev; 127 int r; 128 129 if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET)) { 130 pr_info("%s: vma->vm_pgoff (%ld) < DRM_FILE_PAGE_OFFSET\n", 131 __func__, vma->vm_pgoff); 132 return drm_mmap(filp, vma); 133 } 134 135 file_priv = filp->private_data; 136 qdev = file_priv->minor->dev->dev_private; 137 if (qdev == NULL) { 138 DRM_ERROR( 139 "filp->private_data->minor->dev->dev_private == NULL\n"); 140 return -EINVAL; 141 } 142 QXL_INFO(qdev, "%s: filp->private_data = 0x%p, vma->vm_pgoff = %lx\n", 143 __func__, filp->private_data, vma->vm_pgoff); 144 145 r = ttm_bo_mmap(filp, vma, &qdev->mman.bdev); 146 if (unlikely(r != 0)) 147 return r; 148 if (unlikely(ttm_vm_ops == NULL)) { 149 ttm_vm_ops = vma->vm_ops; 150 qxl_ttm_vm_ops = *ttm_vm_ops; 151 qxl_ttm_vm_ops.fault = &qxl_ttm_fault; 152 } 153 vma->vm_ops = &qxl_ttm_vm_ops; 154 return 0; 155 } 156 157 static int qxl_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags) 158 { 159 return 0; 160 } 161 162 static int qxl_init_mem_type(struct ttm_bo_device *bdev, uint32_t type, 163 struct ttm_mem_type_manager *man) 164 { 165 struct qxl_device *qdev; 166 167 qdev = qxl_get_qdev(bdev); 168 169 switch (type) { 170 case TTM_PL_SYSTEM: 171 /* System memory */ 172 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE; 173 man->available_caching = TTM_PL_MASK_CACHING; 174 man->default_caching = TTM_PL_FLAG_CACHED; 175 break; 176 case TTM_PL_VRAM: 177 case TTM_PL_PRIV0: 178 /* "On-card" video ram */ 179 man->func = &ttm_bo_manager_func; 180 man->gpu_offset = 0; 181 man->flags = TTM_MEMTYPE_FLAG_FIXED | 182 TTM_MEMTYPE_FLAG_MAPPABLE; 183 man->available_caching = TTM_PL_MASK_CACHING; 184 man->default_caching = TTM_PL_FLAG_CACHED; 185 break; 186 default: 187 DRM_ERROR("Unsupported memory type %u\n", (unsigned)type); 188 return -EINVAL; 189 } 190 return 0; 191 } 192 193 static void qxl_evict_flags(struct ttm_buffer_object *bo, 194 struct ttm_placement *placement) 195 { 196 struct qxl_bo *qbo; 197 static u32 placements = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM; 198 199 if (!qxl_ttm_bo_is_qxl_bo(bo)) { 200 placement->fpfn = 0; 201 placement->lpfn = 0; 202 placement->placement = &placements; 203 placement->busy_placement = &placements; 204 placement->num_placement = 1; 205 placement->num_busy_placement = 1; 206 return; 207 } 208 qbo = container_of(bo, struct qxl_bo, tbo); 209 qxl_ttm_placement_from_domain(qbo, QXL_GEM_DOMAIN_CPU, false); 210 *placement = qbo->placement; 211 } 212 213 static int qxl_verify_access(struct ttm_buffer_object *bo, struct file *filp) 214 { 215 struct qxl_bo *qbo = to_qxl_bo(bo); 216 217 return drm_vma_node_verify_access(&qbo->gem_base.vma_node, filp); 218 } 219 220 static int qxl_ttm_io_mem_reserve(struct ttm_bo_device *bdev, 221 struct ttm_mem_reg *mem) 222 { 223 struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; 224 struct qxl_device *qdev = qxl_get_qdev(bdev); 225 226 mem->bus.addr = NULL; 227 mem->bus.offset = 0; 228 mem->bus.size = mem->num_pages << PAGE_SHIFT; 229 mem->bus.base = 0; 230 mem->bus.is_iomem = false; 231 if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE)) 232 return -EINVAL; 233 switch (mem->mem_type) { 234 case TTM_PL_SYSTEM: 235 /* system memory */ 236 return 0; 237 case TTM_PL_VRAM: 238 mem->bus.is_iomem = true; 239 mem->bus.base = qdev->vram_base; 240 mem->bus.offset = mem->start << PAGE_SHIFT; 241 break; 242 case TTM_PL_PRIV0: 243 mem->bus.is_iomem = true; 244 mem->bus.base = qdev->surfaceram_base; 245 mem->bus.offset = mem->start << PAGE_SHIFT; 246 break; 247 default: 248 return -EINVAL; 249 } 250 return 0; 251 } 252 253 static void qxl_ttm_io_mem_free(struct ttm_bo_device *bdev, 254 struct ttm_mem_reg *mem) 255 { 256 } 257 258 /* 259 * TTM backend functions. 260 */ 261 struct qxl_ttm_tt { 262 struct ttm_dma_tt ttm; 263 struct qxl_device *qdev; 264 u64 offset; 265 }; 266 267 static int qxl_ttm_backend_bind(struct ttm_tt *ttm, 268 struct ttm_mem_reg *bo_mem) 269 { 270 struct qxl_ttm_tt *gtt = (void *)ttm; 271 272 gtt->offset = (unsigned long)(bo_mem->start << PAGE_SHIFT); 273 if (!ttm->num_pages) { 274 WARN(1, "nothing to bind %lu pages for mreg %p back %p!\n", 275 ttm->num_pages, bo_mem, ttm); 276 } 277 /* Not implemented */ 278 return -1; 279 } 280 281 static int qxl_ttm_backend_unbind(struct ttm_tt *ttm) 282 { 283 /* Not implemented */ 284 return -1; 285 } 286 287 static void qxl_ttm_backend_destroy(struct ttm_tt *ttm) 288 { 289 struct qxl_ttm_tt *gtt = (void *)ttm; 290 291 ttm_dma_tt_fini(>t->ttm); 292 kfree(gtt); 293 } 294 295 static struct ttm_backend_func qxl_backend_func = { 296 .bind = &qxl_ttm_backend_bind, 297 .unbind = &qxl_ttm_backend_unbind, 298 .destroy = &qxl_ttm_backend_destroy, 299 }; 300 301 static int qxl_ttm_tt_populate(struct ttm_tt *ttm) 302 { 303 int r; 304 305 if (ttm->state != tt_unpopulated) 306 return 0; 307 308 r = ttm_pool_populate(ttm); 309 if (r) 310 return r; 311 312 return 0; 313 } 314 315 static void qxl_ttm_tt_unpopulate(struct ttm_tt *ttm) 316 { 317 ttm_pool_unpopulate(ttm); 318 } 319 320 static struct ttm_tt *qxl_ttm_tt_create(struct ttm_bo_device *bdev, 321 unsigned long size, uint32_t page_flags, 322 struct page *dummy_read_page) 323 { 324 struct qxl_device *qdev; 325 struct qxl_ttm_tt *gtt; 326 327 qdev = qxl_get_qdev(bdev); 328 gtt = kzalloc(sizeof(struct qxl_ttm_tt), GFP_KERNEL); 329 if (gtt == NULL) 330 return NULL; 331 gtt->ttm.ttm.func = &qxl_backend_func; 332 gtt->qdev = qdev; 333 if (ttm_dma_tt_init(>t->ttm, bdev, size, page_flags, 334 dummy_read_page)) { 335 kfree(gtt); 336 return NULL; 337 } 338 return >t->ttm.ttm; 339 } 340 341 static void qxl_move_null(struct ttm_buffer_object *bo, 342 struct ttm_mem_reg *new_mem) 343 { 344 struct ttm_mem_reg *old_mem = &bo->mem; 345 346 BUG_ON(old_mem->mm_node != NULL); 347 *old_mem = *new_mem; 348 new_mem->mm_node = NULL; 349 } 350 351 static int qxl_bo_move(struct ttm_buffer_object *bo, 352 bool evict, bool interruptible, 353 bool no_wait_gpu, 354 struct ttm_mem_reg *new_mem) 355 { 356 struct ttm_mem_reg *old_mem = &bo->mem; 357 if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) { 358 qxl_move_null(bo, new_mem); 359 return 0; 360 } 361 return ttm_bo_move_memcpy(bo, evict, no_wait_gpu, new_mem); 362 } 363 364 365 static int qxl_sync_obj_wait(void *sync_obj, 366 bool lazy, bool interruptible) 367 { 368 struct qxl_fence *qfence = (struct qxl_fence *)sync_obj; 369 int count = 0, sc = 0; 370 struct qxl_bo *bo = container_of(qfence, struct qxl_bo, fence); 371 372 if (qfence->num_active_releases == 0) 373 return 0; 374 375 retry: 376 if (sc == 0) { 377 if (bo->type == QXL_GEM_DOMAIN_SURFACE) 378 qxl_update_surface(qfence->qdev, bo); 379 } else if (sc >= 1) { 380 qxl_io_notify_oom(qfence->qdev); 381 } 382 383 sc++; 384 385 for (count = 0; count < 10; count++) { 386 bool ret; 387 ret = qxl_queue_garbage_collect(qfence->qdev, true); 388 if (ret == false) 389 break; 390 391 if (qfence->num_active_releases == 0) 392 return 0; 393 } 394 395 if (qfence->num_active_releases) { 396 bool have_drawable_releases = false; 397 void **slot; 398 struct radix_tree_iter iter; 399 int release_id; 400 401 radix_tree_for_each_slot(slot, &qfence->tree, &iter, 0) { 402 struct qxl_release *release; 403 404 release_id = iter.index; 405 release = qxl_release_from_id_locked(qfence->qdev, release_id); 406 if (release == NULL) 407 continue; 408 409 if (release->type == QXL_RELEASE_DRAWABLE) 410 have_drawable_releases = true; 411 } 412 413 qxl_queue_garbage_collect(qfence->qdev, true); 414 415 if (have_drawable_releases || sc < 4) { 416 if (sc > 2) 417 /* back off */ 418 usleep_range(500, 1000); 419 if (have_drawable_releases && sc > 300) { 420 WARN(1, "sync obj %d still has outstanding releases %d %d %d %ld %d\n", sc, bo->surface_id, bo->is_primary, bo->pin_count, (unsigned long)bo->gem_base.size, qfence->num_active_releases); 421 return -EBUSY; 422 } 423 goto retry; 424 } 425 } 426 return 0; 427 } 428 429 static int qxl_sync_obj_flush(void *sync_obj) 430 { 431 return 0; 432 } 433 434 static void qxl_sync_obj_unref(void **sync_obj) 435 { 436 } 437 438 static void *qxl_sync_obj_ref(void *sync_obj) 439 { 440 return sync_obj; 441 } 442 443 static bool qxl_sync_obj_signaled(void *sync_obj) 444 { 445 struct qxl_fence *qfence = (struct qxl_fence *)sync_obj; 446 return (qfence->num_active_releases == 0); 447 } 448 449 static void qxl_bo_move_notify(struct ttm_buffer_object *bo, 450 struct ttm_mem_reg *new_mem) 451 { 452 struct qxl_bo *qbo; 453 struct qxl_device *qdev; 454 455 if (!qxl_ttm_bo_is_qxl_bo(bo)) 456 return; 457 qbo = container_of(bo, struct qxl_bo, tbo); 458 qdev = qbo->gem_base.dev->dev_private; 459 460 if (bo->mem.mem_type == TTM_PL_PRIV0 && qbo->surface_id) 461 qxl_surface_evict(qdev, qbo, new_mem ? true : false); 462 } 463 464 static struct ttm_bo_driver qxl_bo_driver = { 465 .ttm_tt_create = &qxl_ttm_tt_create, 466 .ttm_tt_populate = &qxl_ttm_tt_populate, 467 .ttm_tt_unpopulate = &qxl_ttm_tt_unpopulate, 468 .invalidate_caches = &qxl_invalidate_caches, 469 .init_mem_type = &qxl_init_mem_type, 470 .evict_flags = &qxl_evict_flags, 471 .move = &qxl_bo_move, 472 .verify_access = &qxl_verify_access, 473 .io_mem_reserve = &qxl_ttm_io_mem_reserve, 474 .io_mem_free = &qxl_ttm_io_mem_free, 475 .sync_obj_signaled = &qxl_sync_obj_signaled, 476 .sync_obj_wait = &qxl_sync_obj_wait, 477 .sync_obj_flush = &qxl_sync_obj_flush, 478 .sync_obj_unref = &qxl_sync_obj_unref, 479 .sync_obj_ref = &qxl_sync_obj_ref, 480 .move_notify = &qxl_bo_move_notify, 481 }; 482 483 484 485 int qxl_ttm_init(struct qxl_device *qdev) 486 { 487 int r; 488 int num_io_pages; /* != rom->num_io_pages, we include surface0 */ 489 490 r = qxl_ttm_global_init(qdev); 491 if (r) 492 return r; 493 /* No others user of address space so set it to 0 */ 494 r = ttm_bo_device_init(&qdev->mman.bdev, 495 qdev->mman.bo_global_ref.ref.object, 496 &qxl_bo_driver, DRM_FILE_PAGE_OFFSET, 0); 497 if (r) { 498 DRM_ERROR("failed initializing buffer object driver(%d).\n", r); 499 return r; 500 } 501 /* NOTE: this includes the framebuffer (aka surface 0) */ 502 num_io_pages = qdev->rom->ram_header_offset / PAGE_SIZE; 503 r = ttm_bo_init_mm(&qdev->mman.bdev, TTM_PL_VRAM, 504 num_io_pages); 505 if (r) { 506 DRM_ERROR("Failed initializing VRAM heap.\n"); 507 return r; 508 } 509 r = ttm_bo_init_mm(&qdev->mman.bdev, TTM_PL_PRIV0, 510 qdev->surfaceram_size / PAGE_SIZE); 511 if (r) { 512 DRM_ERROR("Failed initializing Surfaces heap.\n"); 513 return r; 514 } 515 DRM_INFO("qxl: %uM of VRAM memory size\n", 516 (unsigned)qdev->vram_size / (1024 * 1024)); 517 DRM_INFO("qxl: %luM of IO pages memory ready (VRAM domain)\n", 518 ((unsigned)num_io_pages * PAGE_SIZE) / (1024 * 1024)); 519 if (unlikely(qdev->mman.bdev.dev_mapping == NULL)) 520 qdev->mman.bdev.dev_mapping = qdev->ddev->dev_mapping; 521 r = qxl_ttm_debugfs_init(qdev); 522 if (r) { 523 DRM_ERROR("Failed to init debugfs\n"); 524 return r; 525 } 526 return 0; 527 } 528 529 void qxl_ttm_fini(struct qxl_device *qdev) 530 { 531 ttm_bo_clean_mm(&qdev->mman.bdev, TTM_PL_VRAM); 532 ttm_bo_clean_mm(&qdev->mman.bdev, TTM_PL_PRIV0); 533 ttm_bo_device_release(&qdev->mman.bdev); 534 qxl_ttm_global_fini(qdev); 535 DRM_INFO("qxl: ttm finalized\n"); 536 } 537 538 539 #define QXL_DEBUGFS_MEM_TYPES 2 540 541 #if defined(CONFIG_DEBUG_FS) 542 static int qxl_mm_dump_table(struct seq_file *m, void *data) 543 { 544 struct drm_info_node *node = (struct drm_info_node *)m->private; 545 struct drm_mm *mm = (struct drm_mm *)node->info_ent->data; 546 struct drm_device *dev = node->minor->dev; 547 struct qxl_device *rdev = dev->dev_private; 548 int ret; 549 struct ttm_bo_global *glob = rdev->mman.bdev.glob; 550 551 spin_lock(&glob->lru_lock); 552 ret = drm_mm_dump_table(m, mm); 553 spin_unlock(&glob->lru_lock); 554 return ret; 555 } 556 #endif 557 558 static int qxl_ttm_debugfs_init(struct qxl_device *qdev) 559 { 560 #if defined(CONFIG_DEBUG_FS) 561 static struct drm_info_list qxl_mem_types_list[QXL_DEBUGFS_MEM_TYPES]; 562 static char qxl_mem_types_names[QXL_DEBUGFS_MEM_TYPES][32]; 563 unsigned i; 564 565 for (i = 0; i < QXL_DEBUGFS_MEM_TYPES; i++) { 566 if (i == 0) 567 sprintf(qxl_mem_types_names[i], "qxl_mem_mm"); 568 else 569 sprintf(qxl_mem_types_names[i], "qxl_surf_mm"); 570 qxl_mem_types_list[i].name = qxl_mem_types_names[i]; 571 qxl_mem_types_list[i].show = &qxl_mm_dump_table; 572 qxl_mem_types_list[i].driver_features = 0; 573 if (i == 0) 574 qxl_mem_types_list[i].data = qdev->mman.bdev.man[TTM_PL_VRAM].priv; 575 else 576 qxl_mem_types_list[i].data = qdev->mman.bdev.man[TTM_PL_PRIV0].priv; 577 578 } 579 return qxl_debugfs_add_files(qdev, qxl_mem_types_list, i); 580 #else 581 return 0; 582 #endif 583 } 584