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); 210 *placement = qbo->placement; 211 } 212 213 static int qxl_verify_access(struct ttm_buffer_object *bo, struct file *filp) 214 { 215 return 0; 216 } 217 218 static int qxl_ttm_io_mem_reserve(struct ttm_bo_device *bdev, 219 struct ttm_mem_reg *mem) 220 { 221 struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; 222 struct qxl_device *qdev = qxl_get_qdev(bdev); 223 224 mem->bus.addr = NULL; 225 mem->bus.offset = 0; 226 mem->bus.size = mem->num_pages << PAGE_SHIFT; 227 mem->bus.base = 0; 228 mem->bus.is_iomem = false; 229 if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE)) 230 return -EINVAL; 231 switch (mem->mem_type) { 232 case TTM_PL_SYSTEM: 233 /* system memory */ 234 return 0; 235 case TTM_PL_VRAM: 236 mem->bus.is_iomem = true; 237 mem->bus.base = qdev->vram_base; 238 mem->bus.offset = mem->start << PAGE_SHIFT; 239 break; 240 case TTM_PL_PRIV0: 241 mem->bus.is_iomem = true; 242 mem->bus.base = qdev->surfaceram_base; 243 mem->bus.offset = mem->start << PAGE_SHIFT; 244 break; 245 default: 246 return -EINVAL; 247 } 248 return 0; 249 } 250 251 static void qxl_ttm_io_mem_free(struct ttm_bo_device *bdev, 252 struct ttm_mem_reg *mem) 253 { 254 } 255 256 /* 257 * TTM backend functions. 258 */ 259 struct qxl_ttm_tt { 260 struct ttm_dma_tt ttm; 261 struct qxl_device *qdev; 262 u64 offset; 263 }; 264 265 static int qxl_ttm_backend_bind(struct ttm_tt *ttm, 266 struct ttm_mem_reg *bo_mem) 267 { 268 struct qxl_ttm_tt *gtt = (void *)ttm; 269 270 gtt->offset = (unsigned long)(bo_mem->start << PAGE_SHIFT); 271 if (!ttm->num_pages) { 272 WARN(1, "nothing to bind %lu pages for mreg %p back %p!\n", 273 ttm->num_pages, bo_mem, ttm); 274 } 275 /* Not implemented */ 276 return -1; 277 } 278 279 static int qxl_ttm_backend_unbind(struct ttm_tt *ttm) 280 { 281 /* Not implemented */ 282 return -1; 283 } 284 285 static void qxl_ttm_backend_destroy(struct ttm_tt *ttm) 286 { 287 struct qxl_ttm_tt *gtt = (void *)ttm; 288 289 ttm_dma_tt_fini(>t->ttm); 290 kfree(gtt); 291 } 292 293 static struct ttm_backend_func qxl_backend_func = { 294 .bind = &qxl_ttm_backend_bind, 295 .unbind = &qxl_ttm_backend_unbind, 296 .destroy = &qxl_ttm_backend_destroy, 297 }; 298 299 static int qxl_ttm_tt_populate(struct ttm_tt *ttm) 300 { 301 int r; 302 303 if (ttm->state != tt_unpopulated) 304 return 0; 305 306 r = ttm_pool_populate(ttm); 307 if (r) 308 return r; 309 310 return 0; 311 } 312 313 static void qxl_ttm_tt_unpopulate(struct ttm_tt *ttm) 314 { 315 ttm_pool_unpopulate(ttm); 316 } 317 318 static struct ttm_tt *qxl_ttm_tt_create(struct ttm_bo_device *bdev, 319 unsigned long size, uint32_t page_flags, 320 struct page *dummy_read_page) 321 { 322 struct qxl_device *qdev; 323 struct qxl_ttm_tt *gtt; 324 325 qdev = qxl_get_qdev(bdev); 326 gtt = kzalloc(sizeof(struct qxl_ttm_tt), GFP_KERNEL); 327 if (gtt == NULL) 328 return NULL; 329 gtt->ttm.ttm.func = &qxl_backend_func; 330 gtt->qdev = qdev; 331 if (ttm_dma_tt_init(>t->ttm, bdev, size, page_flags, 332 dummy_read_page)) { 333 kfree(gtt); 334 return NULL; 335 } 336 return >t->ttm.ttm; 337 } 338 339 static void qxl_move_null(struct ttm_buffer_object *bo, 340 struct ttm_mem_reg *new_mem) 341 { 342 struct ttm_mem_reg *old_mem = &bo->mem; 343 344 BUG_ON(old_mem->mm_node != NULL); 345 *old_mem = *new_mem; 346 new_mem->mm_node = NULL; 347 } 348 349 static int qxl_bo_move(struct ttm_buffer_object *bo, 350 bool evict, bool interruptible, 351 bool no_wait_gpu, 352 struct ttm_mem_reg *new_mem) 353 { 354 struct ttm_mem_reg *old_mem = &bo->mem; 355 if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) { 356 qxl_move_null(bo, new_mem); 357 return 0; 358 } 359 return ttm_bo_move_memcpy(bo, evict, no_wait_gpu, new_mem); 360 } 361 362 363 static int qxl_sync_obj_wait(void *sync_obj, 364 bool lazy, bool interruptible) 365 { 366 struct qxl_fence *qfence = (struct qxl_fence *)sync_obj; 367 int count = 0, sc = 0; 368 struct qxl_bo *bo = container_of(qfence, struct qxl_bo, fence); 369 370 if (qfence->num_active_releases == 0) 371 return 0; 372 373 retry: 374 if (sc == 0) { 375 if (bo->type == QXL_GEM_DOMAIN_SURFACE) 376 qxl_update_surface(qfence->qdev, bo); 377 } else if (sc >= 1) { 378 qxl_io_notify_oom(qfence->qdev); 379 } 380 381 sc++; 382 383 for (count = 0; count < 10; count++) { 384 bool ret; 385 ret = qxl_queue_garbage_collect(qfence->qdev, true); 386 if (ret == false) 387 break; 388 389 if (qfence->num_active_releases == 0) 390 return 0; 391 } 392 393 if (qfence->num_active_releases) { 394 bool have_drawable_releases = false; 395 void **slot; 396 struct radix_tree_iter iter; 397 int release_id; 398 399 radix_tree_for_each_slot(slot, &qfence->tree, &iter, 0) { 400 struct qxl_release *release; 401 402 release_id = iter.index; 403 release = qxl_release_from_id_locked(qfence->qdev, release_id); 404 if (release == NULL) 405 continue; 406 407 if (release->type == QXL_RELEASE_DRAWABLE) 408 have_drawable_releases = true; 409 } 410 411 qxl_queue_garbage_collect(qfence->qdev, true); 412 413 if (have_drawable_releases || sc < 4) { 414 if (sc > 2) 415 /* back off */ 416 usleep_range(500, 1000); 417 if (have_drawable_releases && sc > 300) { 418 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); 419 return -EBUSY; 420 } 421 goto retry; 422 } 423 } 424 return 0; 425 } 426 427 static int qxl_sync_obj_flush(void *sync_obj) 428 { 429 return 0; 430 } 431 432 static void qxl_sync_obj_unref(void **sync_obj) 433 { 434 } 435 436 static void *qxl_sync_obj_ref(void *sync_obj) 437 { 438 return sync_obj; 439 } 440 441 static bool qxl_sync_obj_signaled(void *sync_obj) 442 { 443 struct qxl_fence *qfence = (struct qxl_fence *)sync_obj; 444 return (qfence->num_active_releases == 0); 445 } 446 447 static void qxl_bo_move_notify(struct ttm_buffer_object *bo, 448 struct ttm_mem_reg *new_mem) 449 { 450 struct qxl_bo *qbo; 451 struct qxl_device *qdev; 452 453 if (!qxl_ttm_bo_is_qxl_bo(bo)) 454 return; 455 qbo = container_of(bo, struct qxl_bo, tbo); 456 qdev = qbo->gem_base.dev->dev_private; 457 458 if (bo->mem.mem_type == TTM_PL_PRIV0 && qbo->surface_id) 459 qxl_surface_evict(qdev, qbo, new_mem ? true : false); 460 } 461 462 static struct ttm_bo_driver qxl_bo_driver = { 463 .ttm_tt_create = &qxl_ttm_tt_create, 464 .ttm_tt_populate = &qxl_ttm_tt_populate, 465 .ttm_tt_unpopulate = &qxl_ttm_tt_unpopulate, 466 .invalidate_caches = &qxl_invalidate_caches, 467 .init_mem_type = &qxl_init_mem_type, 468 .evict_flags = &qxl_evict_flags, 469 .move = &qxl_bo_move, 470 .verify_access = &qxl_verify_access, 471 .io_mem_reserve = &qxl_ttm_io_mem_reserve, 472 .io_mem_free = &qxl_ttm_io_mem_free, 473 .sync_obj_signaled = &qxl_sync_obj_signaled, 474 .sync_obj_wait = &qxl_sync_obj_wait, 475 .sync_obj_flush = &qxl_sync_obj_flush, 476 .sync_obj_unref = &qxl_sync_obj_unref, 477 .sync_obj_ref = &qxl_sync_obj_ref, 478 .move_notify = &qxl_bo_move_notify, 479 }; 480 481 482 483 int qxl_ttm_init(struct qxl_device *qdev) 484 { 485 int r; 486 int num_io_pages; /* != rom->num_io_pages, we include surface0 */ 487 488 r = qxl_ttm_global_init(qdev); 489 if (r) 490 return r; 491 /* No others user of address space so set it to 0 */ 492 r = ttm_bo_device_init(&qdev->mman.bdev, 493 qdev->mman.bo_global_ref.ref.object, 494 &qxl_bo_driver, DRM_FILE_PAGE_OFFSET, 0); 495 if (r) { 496 DRM_ERROR("failed initializing buffer object driver(%d).\n", r); 497 return r; 498 } 499 /* NOTE: this includes the framebuffer (aka surface 0) */ 500 num_io_pages = qdev->rom->ram_header_offset / PAGE_SIZE; 501 r = ttm_bo_init_mm(&qdev->mman.bdev, TTM_PL_VRAM, 502 num_io_pages); 503 if (r) { 504 DRM_ERROR("Failed initializing VRAM heap.\n"); 505 return r; 506 } 507 r = ttm_bo_init_mm(&qdev->mman.bdev, TTM_PL_PRIV0, 508 qdev->surfaceram_size / PAGE_SIZE); 509 if (r) { 510 DRM_ERROR("Failed initializing Surfaces heap.\n"); 511 return r; 512 } 513 DRM_INFO("qxl: %uM of VRAM memory size\n", 514 (unsigned)qdev->vram_size / (1024 * 1024)); 515 DRM_INFO("qxl: %luM of IO pages memory ready (VRAM domain)\n", 516 ((unsigned)num_io_pages * PAGE_SIZE) / (1024 * 1024)); 517 if (unlikely(qdev->mman.bdev.dev_mapping == NULL)) 518 qdev->mman.bdev.dev_mapping = qdev->ddev->dev_mapping; 519 r = qxl_ttm_debugfs_init(qdev); 520 if (r) { 521 DRM_ERROR("Failed to init debugfs\n"); 522 return r; 523 } 524 return 0; 525 } 526 527 void qxl_ttm_fini(struct qxl_device *qdev) 528 { 529 ttm_bo_clean_mm(&qdev->mman.bdev, TTM_PL_VRAM); 530 ttm_bo_clean_mm(&qdev->mman.bdev, TTM_PL_PRIV0); 531 ttm_bo_device_release(&qdev->mman.bdev); 532 qxl_ttm_global_fini(qdev); 533 DRM_INFO("qxl: ttm finalized\n"); 534 } 535 536 537 #define QXL_DEBUGFS_MEM_TYPES 2 538 539 #if defined(CONFIG_DEBUG_FS) 540 static int qxl_mm_dump_table(struct seq_file *m, void *data) 541 { 542 struct drm_info_node *node = (struct drm_info_node *)m->private; 543 struct drm_mm *mm = (struct drm_mm *)node->info_ent->data; 544 struct drm_device *dev = node->minor->dev; 545 struct qxl_device *rdev = dev->dev_private; 546 int ret; 547 struct ttm_bo_global *glob = rdev->mman.bdev.glob; 548 549 spin_lock(&glob->lru_lock); 550 ret = drm_mm_dump_table(m, mm); 551 spin_unlock(&glob->lru_lock); 552 return ret; 553 } 554 #endif 555 556 static int qxl_ttm_debugfs_init(struct qxl_device *qdev) 557 { 558 #if defined(CONFIG_DEBUG_FS) 559 static struct drm_info_list qxl_mem_types_list[QXL_DEBUGFS_MEM_TYPES]; 560 static char qxl_mem_types_names[QXL_DEBUGFS_MEM_TYPES][32]; 561 unsigned i; 562 563 for (i = 0; i < QXL_DEBUGFS_MEM_TYPES; i++) { 564 if (i == 0) 565 sprintf(qxl_mem_types_names[i], "qxl_mem_mm"); 566 else 567 sprintf(qxl_mem_types_names[i], "qxl_surf_mm"); 568 qxl_mem_types_list[i].name = qxl_mem_types_names[i]; 569 qxl_mem_types_list[i].show = &qxl_mm_dump_table; 570 qxl_mem_types_list[i].driver_features = 0; 571 if (i == 0) 572 qxl_mem_types_list[i].data = qdev->mman.bdev.man[TTM_PL_VRAM].priv; 573 else 574 qxl_mem_types_list[i].data = qdev->mman.bdev.man[TTM_PL_PRIV0].priv; 575 576 } 577 return qxl_debugfs_add_files(qdev, qxl_mem_types_list, i); 578 #else 579 return 0; 580 #endif 581 } 582