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 -EINVAL; 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_PRIV: 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 struct ttm_place placements = { 192 .fpfn = 0, 193 .lpfn = 0, 194 .flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM 195 }; 196 197 if (!qxl_ttm_bo_is_qxl_bo(bo)) { 198 placement->placement = &placements; 199 placement->busy_placement = &placements; 200 placement->num_placement = 1; 201 placement->num_busy_placement = 1; 202 return; 203 } 204 qbo = to_qxl_bo(bo); 205 qxl_ttm_placement_from_domain(qbo, QXL_GEM_DOMAIN_CPU, false); 206 *placement = qbo->placement; 207 } 208 209 static int qxl_verify_access(struct ttm_buffer_object *bo, struct file *filp) 210 { 211 struct qxl_bo *qbo = to_qxl_bo(bo); 212 213 return drm_vma_node_verify_access(&qbo->gem_base.vma_node, 214 filp->private_data); 215 } 216 217 static int qxl_ttm_io_mem_reserve(struct ttm_bo_device *bdev, 218 struct ttm_mem_reg *mem) 219 { 220 struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; 221 struct qxl_device *qdev = qxl_get_qdev(bdev); 222 223 mem->bus.addr = NULL; 224 mem->bus.offset = 0; 225 mem->bus.size = mem->num_pages << PAGE_SHIFT; 226 mem->bus.base = 0; 227 mem->bus.is_iomem = false; 228 if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE)) 229 return -EINVAL; 230 switch (mem->mem_type) { 231 case TTM_PL_SYSTEM: 232 /* system memory */ 233 return 0; 234 case TTM_PL_VRAM: 235 mem->bus.is_iomem = true; 236 mem->bus.base = qdev->vram_base; 237 mem->bus.offset = mem->start << PAGE_SHIFT; 238 break; 239 case TTM_PL_PRIV: 240 mem->bus.is_iomem = true; 241 mem->bus.base = qdev->surfaceram_base; 242 mem->bus.offset = mem->start << PAGE_SHIFT; 243 break; 244 default: 245 return -EINVAL; 246 } 247 return 0; 248 } 249 250 static void qxl_ttm_io_mem_free(struct ttm_bo_device *bdev, 251 struct ttm_mem_reg *mem) 252 { 253 } 254 255 /* 256 * TTM backend functions. 257 */ 258 struct qxl_ttm_tt { 259 struct ttm_dma_tt ttm; 260 struct qxl_device *qdev; 261 u64 offset; 262 }; 263 264 static int qxl_ttm_backend_bind(struct ttm_tt *ttm, 265 struct ttm_mem_reg *bo_mem) 266 { 267 struct qxl_ttm_tt *gtt = (void *)ttm; 268 269 gtt->offset = (unsigned long)(bo_mem->start << PAGE_SHIFT); 270 if (!ttm->num_pages) { 271 WARN(1, "nothing to bind %lu pages for mreg %p back %p!\n", 272 ttm->num_pages, bo_mem, ttm); 273 } 274 /* Not implemented */ 275 return -1; 276 } 277 278 static int qxl_ttm_backend_unbind(struct ttm_tt *ttm) 279 { 280 /* Not implemented */ 281 return -1; 282 } 283 284 static void qxl_ttm_backend_destroy(struct ttm_tt *ttm) 285 { 286 struct qxl_ttm_tt *gtt = (void *)ttm; 287 288 ttm_dma_tt_fini(>t->ttm); 289 kfree(gtt); 290 } 291 292 static struct ttm_backend_func qxl_backend_func = { 293 .bind = &qxl_ttm_backend_bind, 294 .unbind = &qxl_ttm_backend_unbind, 295 .destroy = &qxl_ttm_backend_destroy, 296 }; 297 298 static int qxl_ttm_tt_populate(struct ttm_tt *ttm) 299 { 300 int r; 301 302 if (ttm->state != tt_unpopulated) 303 return 0; 304 305 r = ttm_pool_populate(ttm); 306 if (r) 307 return r; 308 309 return 0; 310 } 311 312 static void qxl_ttm_tt_unpopulate(struct ttm_tt *ttm) 313 { 314 ttm_pool_unpopulate(ttm); 315 } 316 317 static struct ttm_tt *qxl_ttm_tt_create(struct ttm_bo_device *bdev, 318 unsigned long size, uint32_t page_flags, 319 struct page *dummy_read_page) 320 { 321 struct qxl_device *qdev; 322 struct qxl_ttm_tt *gtt; 323 324 qdev = qxl_get_qdev(bdev); 325 gtt = kzalloc(sizeof(struct qxl_ttm_tt), GFP_KERNEL); 326 if (gtt == NULL) 327 return NULL; 328 gtt->ttm.ttm.func = &qxl_backend_func; 329 gtt->qdev = qdev; 330 if (ttm_dma_tt_init(>t->ttm, bdev, size, page_flags, 331 dummy_read_page)) { 332 kfree(gtt); 333 return NULL; 334 } 335 return >t->ttm.ttm; 336 } 337 338 static void qxl_move_null(struct ttm_buffer_object *bo, 339 struct ttm_mem_reg *new_mem) 340 { 341 struct ttm_mem_reg *old_mem = &bo->mem; 342 343 BUG_ON(old_mem->mm_node != NULL); 344 *old_mem = *new_mem; 345 new_mem->mm_node = NULL; 346 } 347 348 static int qxl_bo_move(struct ttm_buffer_object *bo, 349 bool evict, bool interruptible, 350 bool no_wait_gpu, 351 struct ttm_mem_reg *new_mem) 352 { 353 struct ttm_mem_reg *old_mem = &bo->mem; 354 int ret; 355 356 ret = ttm_bo_wait(bo, interruptible, no_wait_gpu); 357 if (ret) 358 return ret; 359 360 361 if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) { 362 qxl_move_null(bo, new_mem); 363 return 0; 364 } 365 return ttm_bo_move_memcpy(bo, interruptible, no_wait_gpu, 366 new_mem); 367 } 368 369 static void qxl_bo_move_notify(struct ttm_buffer_object *bo, 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 .lru_tail = &ttm_bo_default_lru_tail, 398 .swap_lru_tail = &ttm_bo_default_swap_lru_tail, 399 }; 400 401 int qxl_ttm_init(struct qxl_device *qdev) 402 { 403 int r; 404 int num_io_pages; /* != rom->num_io_pages, we include surface0 */ 405 406 r = qxl_ttm_global_init(qdev); 407 if (r) 408 return r; 409 /* No others user of address space so set it to 0 */ 410 r = ttm_bo_device_init(&qdev->mman.bdev, 411 qdev->mman.bo_global_ref.ref.object, 412 &qxl_bo_driver, 413 qdev->ddev->anon_inode->i_mapping, 414 DRM_FILE_PAGE_OFFSET, 0); 415 if (r) { 416 DRM_ERROR("failed initializing buffer object driver(%d).\n", r); 417 return r; 418 } 419 /* NOTE: this includes the framebuffer (aka surface 0) */ 420 num_io_pages = qdev->rom->ram_header_offset / PAGE_SIZE; 421 r = ttm_bo_init_mm(&qdev->mman.bdev, TTM_PL_VRAM, 422 num_io_pages); 423 if (r) { 424 DRM_ERROR("Failed initializing VRAM heap.\n"); 425 return r; 426 } 427 r = ttm_bo_init_mm(&qdev->mman.bdev, TTM_PL_PRIV, 428 qdev->surfaceram_size / PAGE_SIZE); 429 if (r) { 430 DRM_ERROR("Failed initializing Surfaces heap.\n"); 431 return r; 432 } 433 DRM_INFO("qxl: %uM of VRAM memory size\n", 434 (unsigned)qdev->vram_size / (1024 * 1024)); 435 DRM_INFO("qxl: %luM of IO pages memory ready (VRAM domain)\n", 436 ((unsigned)num_io_pages * PAGE_SIZE) / (1024 * 1024)); 437 DRM_INFO("qxl: %uM of Surface memory size\n", 438 (unsigned)qdev->surfaceram_size / (1024 * 1024)); 439 r = qxl_ttm_debugfs_init(qdev); 440 if (r) { 441 DRM_ERROR("Failed to init debugfs\n"); 442 return r; 443 } 444 return 0; 445 } 446 447 void qxl_ttm_fini(struct qxl_device *qdev) 448 { 449 ttm_bo_clean_mm(&qdev->mman.bdev, TTM_PL_VRAM); 450 ttm_bo_clean_mm(&qdev->mman.bdev, TTM_PL_PRIV); 451 ttm_bo_device_release(&qdev->mman.bdev); 452 qxl_ttm_global_fini(qdev); 453 DRM_INFO("qxl: ttm finalized\n"); 454 } 455 456 457 #define QXL_DEBUGFS_MEM_TYPES 2 458 459 #if defined(CONFIG_DEBUG_FS) 460 static int qxl_mm_dump_table(struct seq_file *m, void *data) 461 { 462 struct drm_info_node *node = (struct drm_info_node *)m->private; 463 struct drm_mm *mm = (struct drm_mm *)node->info_ent->data; 464 struct drm_device *dev = node->minor->dev; 465 struct qxl_device *rdev = dev->dev_private; 466 int ret; 467 struct ttm_bo_global *glob = rdev->mman.bdev.glob; 468 469 spin_lock(&glob->lru_lock); 470 ret = drm_mm_dump_table(m, mm); 471 spin_unlock(&glob->lru_lock); 472 return ret; 473 } 474 #endif 475 476 static int qxl_ttm_debugfs_init(struct qxl_device *qdev) 477 { 478 #if defined(CONFIG_DEBUG_FS) 479 static struct drm_info_list qxl_mem_types_list[QXL_DEBUGFS_MEM_TYPES]; 480 static char qxl_mem_types_names[QXL_DEBUGFS_MEM_TYPES][32]; 481 unsigned i; 482 483 for (i = 0; i < QXL_DEBUGFS_MEM_TYPES; i++) { 484 if (i == 0) 485 sprintf(qxl_mem_types_names[i], "qxl_mem_mm"); 486 else 487 sprintf(qxl_mem_types_names[i], "qxl_surf_mm"); 488 qxl_mem_types_list[i].name = qxl_mem_types_names[i]; 489 qxl_mem_types_list[i].show = &qxl_mm_dump_table; 490 qxl_mem_types_list[i].driver_features = 0; 491 if (i == 0) 492 qxl_mem_types_list[i].data = qdev->mman.bdev.man[TTM_PL_VRAM].priv; 493 else 494 qxl_mem_types_list[i].data = qdev->mman.bdev.man[TTM_PL_PRIV].priv; 495 496 } 497 return qxl_debugfs_add_files(qdev, qxl_mem_types_list, i); 498 #else 499 return 0; 500 #endif 501 } 502