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