1 /* $NetBSD: qxl_ttm.c,v 1.2 2018/08/27 04:58:35 riastradh Exp $ */ 2 3 /* 4 * Copyright 2013 Red Hat Inc. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the "Software"), 8 * to deal in the Software without restriction, including without limitation 9 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10 * and/or sell copies of the Software, and to permit persons to whom the 11 * Software is furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 22 * OTHER DEALINGS IN THE SOFTWARE. 23 * 24 * Authors: Dave Airlie 25 * Alon Levy 26 */ 27 28 #include <sys/cdefs.h> 29 __KERNEL_RCSID(0, "$NetBSD: qxl_ttm.c,v 1.2 2018/08/27 04:58:35 riastradh Exp $"); 30 31 #include <ttm/ttm_bo_api.h> 32 #include <ttm/ttm_bo_driver.h> 33 #include <ttm/ttm_placement.h> 34 #include <ttm/ttm_page_alloc.h> 35 #include <ttm/ttm_module.h> 36 #include <drm/drmP.h> 37 #include <drm/drm.h> 38 #include <drm/qxl_drm.h> 39 #include "qxl_drv.h" 40 #include "qxl_object.h" 41 42 #include <linux/delay.h> 43 static int qxl_ttm_debugfs_init(struct qxl_device *qdev); 44 45 static struct qxl_device *qxl_get_qdev(struct ttm_bo_device *bdev) 46 { 47 struct qxl_mman *mman; 48 struct qxl_device *qdev; 49 50 mman = container_of(bdev, struct qxl_mman, bdev); 51 qdev = container_of(mman, struct qxl_device, mman); 52 return qdev; 53 } 54 55 static int qxl_ttm_mem_global_init(struct drm_global_reference *ref) 56 { 57 return ttm_mem_global_init(ref->object); 58 } 59 60 static void qxl_ttm_mem_global_release(struct drm_global_reference *ref) 61 { 62 ttm_mem_global_release(ref->object); 63 } 64 65 static int qxl_ttm_global_init(struct qxl_device *qdev) 66 { 67 struct drm_global_reference *global_ref; 68 int r; 69 70 qdev->mman.mem_global_referenced = false; 71 global_ref = &qdev->mman.mem_global_ref; 72 global_ref->global_type = DRM_GLOBAL_TTM_MEM; 73 global_ref->size = sizeof(struct ttm_mem_global); 74 global_ref->init = &qxl_ttm_mem_global_init; 75 global_ref->release = &qxl_ttm_mem_global_release; 76 77 r = drm_global_item_ref(global_ref); 78 if (r != 0) { 79 DRM_ERROR("Failed setting up TTM memory accounting " 80 "subsystem.\n"); 81 return r; 82 } 83 84 qdev->mman.bo_global_ref.mem_glob = 85 qdev->mman.mem_global_ref.object; 86 global_ref = &qdev->mman.bo_global_ref.ref; 87 global_ref->global_type = DRM_GLOBAL_TTM_BO; 88 global_ref->size = sizeof(struct ttm_bo_global); 89 global_ref->init = &ttm_bo_global_init; 90 global_ref->release = &ttm_bo_global_release; 91 r = drm_global_item_ref(global_ref); 92 if (r != 0) { 93 DRM_ERROR("Failed setting up TTM BO subsystem.\n"); 94 drm_global_item_unref(&qdev->mman.mem_global_ref); 95 return r; 96 } 97 98 qdev->mman.mem_global_referenced = true; 99 return 0; 100 } 101 102 static void qxl_ttm_global_fini(struct qxl_device *qdev) 103 { 104 if (qdev->mman.mem_global_referenced) { 105 drm_global_item_unref(&qdev->mman.bo_global_ref.ref); 106 drm_global_item_unref(&qdev->mman.mem_global_ref); 107 qdev->mman.mem_global_referenced = false; 108 } 109 } 110 111 static struct vm_operations_struct qxl_ttm_vm_ops; 112 static const struct vm_operations_struct *ttm_vm_ops; 113 114 static int qxl_ttm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) 115 { 116 struct ttm_buffer_object *bo; 117 int r; 118 119 bo = (struct ttm_buffer_object *)vma->vm_private_data; 120 if (bo == NULL) 121 return VM_FAULT_NOPAGE; 122 r = ttm_vm_ops->fault(vma, vmf); 123 return r; 124 } 125 126 int qxl_mmap(struct file *filp, struct vm_area_struct *vma) 127 { 128 struct drm_file *file_priv; 129 struct qxl_device *qdev; 130 int r; 131 132 if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET)) { 133 pr_info("%s: vma->vm_pgoff (%ld) < DRM_FILE_PAGE_OFFSET\n", 134 __func__, vma->vm_pgoff); 135 return -EINVAL; 136 } 137 138 file_priv = filp->private_data; 139 qdev = file_priv->minor->dev->dev_private; 140 if (qdev == NULL) { 141 DRM_ERROR( 142 "filp->private_data->minor->dev->dev_private == NULL\n"); 143 return -EINVAL; 144 } 145 QXL_INFO(qdev, "%s: filp->private_data = 0x%p, vma->vm_pgoff = %lx\n", 146 __func__, filp->private_data, vma->vm_pgoff); 147 148 r = ttm_bo_mmap(filp, vma, &qdev->mman.bdev); 149 if (unlikely(r != 0)) 150 return r; 151 if (unlikely(ttm_vm_ops == NULL)) { 152 ttm_vm_ops = vma->vm_ops; 153 qxl_ttm_vm_ops = *ttm_vm_ops; 154 qxl_ttm_vm_ops.fault = &qxl_ttm_fault; 155 } 156 vma->vm_ops = &qxl_ttm_vm_ops; 157 return 0; 158 } 159 160 static int qxl_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags) 161 { 162 return 0; 163 } 164 165 static int qxl_init_mem_type(struct ttm_bo_device *bdev, uint32_t type, 166 struct ttm_mem_type_manager *man) 167 { 168 switch (type) { 169 case TTM_PL_SYSTEM: 170 /* System memory */ 171 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE; 172 man->available_caching = TTM_PL_MASK_CACHING; 173 man->default_caching = TTM_PL_FLAG_CACHED; 174 break; 175 case TTM_PL_VRAM: 176 case TTM_PL_PRIV0: 177 /* "On-card" video ram */ 178 man->func = &ttm_bo_manager_func; 179 man->gpu_offset = 0; 180 man->flags = TTM_MEMTYPE_FLAG_FIXED | 181 TTM_MEMTYPE_FLAG_MAPPABLE; 182 man->available_caching = TTM_PL_MASK_CACHING; 183 man->default_caching = TTM_PL_FLAG_CACHED; 184 break; 185 default: 186 DRM_ERROR("Unsupported memory type %u\n", (unsigned)type); 187 return -EINVAL; 188 } 189 return 0; 190 } 191 192 static void qxl_evict_flags(struct ttm_buffer_object *bo, 193 struct ttm_placement *placement) 194 { 195 struct qxl_bo *qbo; 196 static struct ttm_place placements = { 197 .fpfn = 0, 198 .lpfn = 0, 199 .flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM 200 }; 201 202 if (!qxl_ttm_bo_is_qxl_bo(bo)) { 203 placement->placement = &placements; 204 placement->busy_placement = &placements; 205 placement->num_placement = 1; 206 placement->num_busy_placement = 1; 207 return; 208 } 209 qbo = container_of(bo, struct qxl_bo, tbo); 210 qxl_ttm_placement_from_domain(qbo, QXL_GEM_DOMAIN_CPU, false); 211 *placement = qbo->placement; 212 } 213 214 static int qxl_verify_access(struct ttm_buffer_object *bo, struct file *filp) 215 { 216 struct qxl_bo *qbo = to_qxl_bo(bo); 217 218 return drm_vma_node_verify_access(&qbo->gem_base.vma_node, filp); 219 } 220 221 static int qxl_ttm_io_mem_reserve(struct ttm_bo_device *bdev, 222 struct ttm_mem_reg *mem) 223 { 224 struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; 225 struct qxl_device *qdev = qxl_get_qdev(bdev); 226 227 mem->bus.addr = NULL; 228 mem->bus.offset = 0; 229 mem->bus.size = mem->num_pages << PAGE_SHIFT; 230 mem->bus.base = 0; 231 mem->bus.is_iomem = false; 232 if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE)) 233 return -EINVAL; 234 switch (mem->mem_type) { 235 case TTM_PL_SYSTEM: 236 /* system memory */ 237 return 0; 238 case TTM_PL_VRAM: 239 mem->bus.is_iomem = true; 240 mem->bus.base = qdev->vram_base; 241 mem->bus.offset = mem->start << PAGE_SHIFT; 242 break; 243 case TTM_PL_PRIV0: 244 mem->bus.is_iomem = true; 245 mem->bus.base = qdev->surfaceram_base; 246 mem->bus.offset = mem->start << PAGE_SHIFT; 247 break; 248 default: 249 return -EINVAL; 250 } 251 return 0; 252 } 253 254 static void qxl_ttm_io_mem_free(struct ttm_bo_device *bdev, 255 struct ttm_mem_reg *mem) 256 { 257 } 258 259 /* 260 * TTM backend functions. 261 */ 262 struct qxl_ttm_tt { 263 struct ttm_dma_tt ttm; 264 struct qxl_device *qdev; 265 u64 offset; 266 }; 267 268 static int qxl_ttm_backend_bind(struct ttm_tt *ttm, 269 struct ttm_mem_reg *bo_mem) 270 { 271 struct qxl_ttm_tt *gtt = (void *)ttm; 272 273 gtt->offset = (unsigned long)(bo_mem->start << PAGE_SHIFT); 274 if (!ttm->num_pages) { 275 WARN(1, "nothing to bind %lu pages for mreg %p back %p!\n", 276 ttm->num_pages, bo_mem, ttm); 277 } 278 /* Not implemented */ 279 return -1; 280 } 281 282 static int qxl_ttm_backend_unbind(struct ttm_tt *ttm) 283 { 284 /* Not implemented */ 285 return -1; 286 } 287 288 static void qxl_ttm_backend_destroy(struct ttm_tt *ttm) 289 { 290 struct qxl_ttm_tt *gtt = (void *)ttm; 291 292 ttm_dma_tt_fini(>t->ttm); 293 kfree(gtt); 294 } 295 296 static struct ttm_backend_func qxl_backend_func = { 297 .bind = &qxl_ttm_backend_bind, 298 .unbind = &qxl_ttm_backend_unbind, 299 .destroy = &qxl_ttm_backend_destroy, 300 }; 301 302 static int qxl_ttm_tt_populate(struct ttm_tt *ttm) 303 { 304 int r; 305 306 if (ttm->state != tt_unpopulated) 307 return 0; 308 309 r = ttm_pool_populate(ttm); 310 if (r) 311 return r; 312 313 return 0; 314 } 315 316 static void qxl_ttm_tt_unpopulate(struct ttm_tt *ttm) 317 { 318 ttm_pool_unpopulate(ttm); 319 } 320 321 static struct ttm_tt *qxl_ttm_tt_create(struct ttm_bo_device *bdev, 322 unsigned long size, uint32_t page_flags, 323 struct page *dummy_read_page) 324 { 325 struct qxl_device *qdev; 326 struct qxl_ttm_tt *gtt; 327 328 qdev = qxl_get_qdev(bdev); 329 gtt = kzalloc(sizeof(struct qxl_ttm_tt), GFP_KERNEL); 330 if (gtt == NULL) 331 return NULL; 332 gtt->ttm.ttm.func = &qxl_backend_func; 333 gtt->qdev = qdev; 334 if (ttm_dma_tt_init(>t->ttm, bdev, size, page_flags, 335 dummy_read_page)) { 336 kfree(gtt); 337 return NULL; 338 } 339 return >t->ttm.ttm; 340 } 341 342 static void qxl_move_null(struct ttm_buffer_object *bo, 343 struct ttm_mem_reg *new_mem) 344 { 345 struct ttm_mem_reg *old_mem = &bo->mem; 346 347 BUG_ON(old_mem->mm_node != NULL); 348 *old_mem = *new_mem; 349 new_mem->mm_node = NULL; 350 } 351 352 static int qxl_bo_move(struct ttm_buffer_object *bo, 353 bool evict, bool interruptible, 354 bool no_wait_gpu, 355 struct ttm_mem_reg *new_mem) 356 { 357 struct ttm_mem_reg *old_mem = &bo->mem; 358 if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) { 359 qxl_move_null(bo, new_mem); 360 return 0; 361 } 362 return ttm_bo_move_memcpy(bo, evict, no_wait_gpu, new_mem); 363 } 364 365 static void qxl_bo_move_notify(struct ttm_buffer_object *bo, 366 struct ttm_mem_reg *new_mem) 367 { 368 struct qxl_bo *qbo; 369 struct qxl_device *qdev; 370 371 if (!qxl_ttm_bo_is_qxl_bo(bo)) 372 return; 373 qbo = container_of(bo, struct qxl_bo, tbo); 374 qdev = qbo->gem_base.dev->dev_private; 375 376 if (bo->mem.mem_type == TTM_PL_PRIV0 && qbo->surface_id) 377 qxl_surface_evict(qdev, qbo, new_mem ? true : false); 378 } 379 380 static struct ttm_bo_driver qxl_bo_driver = { 381 .ttm_tt_create = &qxl_ttm_tt_create, 382 .ttm_tt_populate = &qxl_ttm_tt_populate, 383 .ttm_tt_unpopulate = &qxl_ttm_tt_unpopulate, 384 .invalidate_caches = &qxl_invalidate_caches, 385 .init_mem_type = &qxl_init_mem_type, 386 .evict_flags = &qxl_evict_flags, 387 .move = &qxl_bo_move, 388 .verify_access = &qxl_verify_access, 389 .io_mem_reserve = &qxl_ttm_io_mem_reserve, 390 .io_mem_free = &qxl_ttm_io_mem_free, 391 .move_notify = &qxl_bo_move_notify, 392 }; 393 394 int qxl_ttm_init(struct qxl_device *qdev) 395 { 396 int r; 397 int num_io_pages; /* != rom->num_io_pages, we include surface0 */ 398 399 r = qxl_ttm_global_init(qdev); 400 if (r) 401 return r; 402 /* No others user of address space so set it to 0 */ 403 r = ttm_bo_device_init(&qdev->mman.bdev, 404 qdev->mman.bo_global_ref.ref.object, 405 &qxl_bo_driver, 406 qdev->ddev->anon_inode->i_mapping, 407 DRM_FILE_PAGE_OFFSET, 0); 408 if (r) { 409 DRM_ERROR("failed initializing buffer object driver(%d).\n", r); 410 return r; 411 } 412 /* NOTE: this includes the framebuffer (aka surface 0) */ 413 num_io_pages = qdev->rom->ram_header_offset / PAGE_SIZE; 414 r = ttm_bo_init_mm(&qdev->mman.bdev, TTM_PL_VRAM, 415 num_io_pages); 416 if (r) { 417 DRM_ERROR("Failed initializing VRAM heap.\n"); 418 return r; 419 } 420 r = ttm_bo_init_mm(&qdev->mman.bdev, TTM_PL_PRIV0, 421 qdev->surfaceram_size / PAGE_SIZE); 422 if (r) { 423 DRM_ERROR("Failed initializing Surfaces heap.\n"); 424 return r; 425 } 426 DRM_INFO("qxl: %uM of VRAM memory size\n", 427 (unsigned)qdev->vram_size / (1024 * 1024)); 428 DRM_INFO("qxl: %luM of IO pages memory ready (VRAM domain)\n", 429 ((unsigned)num_io_pages * PAGE_SIZE) / (1024 * 1024)); 430 DRM_INFO("qxl: %uM of Surface memory size\n", 431 (unsigned)qdev->surfaceram_size / (1024 * 1024)); 432 r = qxl_ttm_debugfs_init(qdev); 433 if (r) { 434 DRM_ERROR("Failed to init debugfs\n"); 435 return r; 436 } 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_PRIV0); 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 int ret; 460 struct ttm_bo_global *glob = rdev->mman.bdev.glob; 461 462 spin_lock(&glob->lru_lock); 463 ret = drm_mm_dump_table(m, mm); 464 spin_unlock(&glob->lru_lock); 465 return ret; 466 } 467 #endif 468 469 static 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_PRIV0].priv; 488 489 } 490 return qxl_debugfs_add_files(qdev, qxl_mem_types_list, i); 491 #else 492 return 0; 493 #endif 494 } 495