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 <drm/ttm/ttm_bo_api.h> 27 #include <drm/ttm/ttm_bo_driver.h> 28 #include <drm/ttm/ttm_placement.h> 29 #include <drm/ttm/ttm_page_alloc.h> 30 #include <drm/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 39 static struct qxl_device *qxl_get_qdev(struct ttm_bo_device *bdev) 40 { 41 struct qxl_mman *mman; 42 struct qxl_device *qdev; 43 44 mman = container_of(bdev, struct qxl_mman, bdev); 45 qdev = container_of(mman, struct qxl_device, mman); 46 return qdev; 47 } 48 49 static int qxl_ttm_mem_global_init(struct drm_global_reference *ref) 50 { 51 return ttm_mem_global_init(ref->object); 52 } 53 54 static void qxl_ttm_mem_global_release(struct drm_global_reference *ref) 55 { 56 ttm_mem_global_release(ref->object); 57 } 58 59 static int qxl_ttm_global_init(struct qxl_device *qdev) 60 { 61 struct drm_global_reference *global_ref; 62 int r; 63 64 qdev->mman.mem_global_referenced = false; 65 global_ref = &qdev->mman.mem_global_ref; 66 global_ref->global_type = DRM_GLOBAL_TTM_MEM; 67 global_ref->size = sizeof(struct ttm_mem_global); 68 global_ref->init = &qxl_ttm_mem_global_init; 69 global_ref->release = &qxl_ttm_mem_global_release; 70 71 r = drm_global_item_ref(global_ref); 72 if (r != 0) { 73 DRM_ERROR("Failed setting up TTM memory accounting " 74 "subsystem.\n"); 75 return r; 76 } 77 78 qdev->mman.bo_global_ref.mem_glob = 79 qdev->mman.mem_global_ref.object; 80 global_ref = &qdev->mman.bo_global_ref.ref; 81 global_ref->global_type = DRM_GLOBAL_TTM_BO; 82 global_ref->size = sizeof(struct ttm_bo_global); 83 global_ref->init = &ttm_bo_global_init; 84 global_ref->release = &ttm_bo_global_release; 85 r = drm_global_item_ref(global_ref); 86 if (r != 0) { 87 DRM_ERROR("Failed setting up TTM BO subsystem.\n"); 88 drm_global_item_unref(&qdev->mman.mem_global_ref); 89 return r; 90 } 91 92 qdev->mman.mem_global_referenced = true; 93 return 0; 94 } 95 96 static void qxl_ttm_global_fini(struct qxl_device *qdev) 97 { 98 if (qdev->mman.mem_global_referenced) { 99 drm_global_item_unref(&qdev->mman.bo_global_ref.ref); 100 drm_global_item_unref(&qdev->mman.mem_global_ref); 101 qdev->mman.mem_global_referenced = false; 102 } 103 } 104 105 static struct vm_operations_struct qxl_ttm_vm_ops; 106 static const struct vm_operations_struct *ttm_vm_ops; 107 108 static vm_fault_t qxl_ttm_fault(struct vm_fault *vmf) 109 { 110 struct ttm_buffer_object *bo; 111 vm_fault_t ret; 112 113 bo = (struct ttm_buffer_object *)vmf->vma->vm_private_data; 114 if (bo == NULL) 115 return VM_FAULT_NOPAGE; 116 ret = ttm_vm_ops->fault(vmf); 117 return ret; 118 } 119 120 int qxl_mmap(struct file *filp, struct vm_area_struct *vma) 121 { 122 struct drm_file *file_priv; 123 struct qxl_device *qdev; 124 int r; 125 126 if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET)) 127 return -EINVAL; 128 129 file_priv = filp->private_data; 130 qdev = file_priv->minor->dev->dev_private; 131 if (qdev == NULL) { 132 DRM_ERROR( 133 "filp->private_data->minor->dev->dev_private == NULL\n"); 134 return -EINVAL; 135 } 136 DRM_DEBUG_DRIVER("filp->private_data = 0x%p, vma->vm_pgoff = %lx\n", 137 filp->private_data, vma->vm_pgoff); 138 139 r = ttm_bo_mmap(filp, vma, &qdev->mman.bdev); 140 if (unlikely(r != 0)) 141 return r; 142 if (unlikely(ttm_vm_ops == NULL)) { 143 ttm_vm_ops = vma->vm_ops; 144 qxl_ttm_vm_ops = *ttm_vm_ops; 145 qxl_ttm_vm_ops.fault = &qxl_ttm_fault; 146 } 147 vma->vm_ops = &qxl_ttm_vm_ops; 148 return 0; 149 } 150 151 static int qxl_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags) 152 { 153 return 0; 154 } 155 156 static int qxl_init_mem_type(struct ttm_bo_device *bdev, uint32_t type, 157 struct ttm_mem_type_manager *man) 158 { 159 switch (type) { 160 case TTM_PL_SYSTEM: 161 /* System memory */ 162 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE; 163 man->available_caching = TTM_PL_MASK_CACHING; 164 man->default_caching = TTM_PL_FLAG_CACHED; 165 break; 166 case TTM_PL_VRAM: 167 case TTM_PL_PRIV: 168 /* "On-card" video ram */ 169 man->func = &ttm_bo_manager_func; 170 man->gpu_offset = 0; 171 man->flags = TTM_MEMTYPE_FLAG_FIXED | 172 TTM_MEMTYPE_FLAG_MAPPABLE; 173 man->available_caching = TTM_PL_MASK_CACHING; 174 man->default_caching = TTM_PL_FLAG_CACHED; 175 break; 176 default: 177 DRM_ERROR("Unsupported memory type %u\n", (unsigned)type); 178 return -EINVAL; 179 } 180 return 0; 181 } 182 183 static void qxl_evict_flags(struct ttm_buffer_object *bo, 184 struct ttm_placement *placement) 185 { 186 struct qxl_bo *qbo; 187 static const struct ttm_place placements = { 188 .fpfn = 0, 189 .lpfn = 0, 190 .flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM 191 }; 192 193 if (!qxl_ttm_bo_is_qxl_bo(bo)) { 194 placement->placement = &placements; 195 placement->busy_placement = &placements; 196 placement->num_placement = 1; 197 placement->num_busy_placement = 1; 198 return; 199 } 200 qbo = to_qxl_bo(bo); 201 qxl_ttm_placement_from_domain(qbo, QXL_GEM_DOMAIN_CPU, false); 202 *placement = qbo->placement; 203 } 204 205 static int qxl_verify_access(struct ttm_buffer_object *bo, struct file *filp) 206 { 207 struct qxl_bo *qbo = to_qxl_bo(bo); 208 209 return drm_vma_node_verify_access(&qbo->gem_base.vma_node, 210 filp->private_data); 211 } 212 213 static int qxl_ttm_io_mem_reserve(struct ttm_bo_device *bdev, 214 struct ttm_mem_reg *mem) 215 { 216 struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; 217 struct qxl_device *qdev = qxl_get_qdev(bdev); 218 219 mem->bus.addr = NULL; 220 mem->bus.offset = 0; 221 mem->bus.size = mem->num_pages << PAGE_SHIFT; 222 mem->bus.base = 0; 223 mem->bus.is_iomem = false; 224 if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE)) 225 return -EINVAL; 226 switch (mem->mem_type) { 227 case TTM_PL_SYSTEM: 228 /* system memory */ 229 return 0; 230 case TTM_PL_VRAM: 231 mem->bus.is_iomem = true; 232 mem->bus.base = qdev->vram_base; 233 mem->bus.offset = mem->start << PAGE_SHIFT; 234 break; 235 case TTM_PL_PRIV: 236 mem->bus.is_iomem = true; 237 mem->bus.base = qdev->surfaceram_base; 238 mem->bus.offset = mem->start << PAGE_SHIFT; 239 break; 240 default: 241 return -EINVAL; 242 } 243 return 0; 244 } 245 246 static void qxl_ttm_io_mem_free(struct ttm_bo_device *bdev, 247 struct ttm_mem_reg *mem) 248 { 249 } 250 251 /* 252 * TTM backend functions. 253 */ 254 struct qxl_ttm_tt { 255 struct ttm_dma_tt ttm; 256 struct qxl_device *qdev; 257 u64 offset; 258 }; 259 260 static int qxl_ttm_backend_bind(struct ttm_tt *ttm, 261 struct ttm_mem_reg *bo_mem) 262 { 263 struct qxl_ttm_tt *gtt = (void *)ttm; 264 265 gtt->offset = (unsigned long)(bo_mem->start << PAGE_SHIFT); 266 if (!ttm->num_pages) { 267 WARN(1, "nothing to bind %lu pages for mreg %p back %p!\n", 268 ttm->num_pages, bo_mem, ttm); 269 } 270 /* Not implemented */ 271 return -1; 272 } 273 274 static int qxl_ttm_backend_unbind(struct ttm_tt *ttm) 275 { 276 /* Not implemented */ 277 return -1; 278 } 279 280 static void qxl_ttm_backend_destroy(struct ttm_tt *ttm) 281 { 282 struct qxl_ttm_tt *gtt = (void *)ttm; 283 284 ttm_dma_tt_fini(>t->ttm); 285 kfree(gtt); 286 } 287 288 static struct ttm_backend_func qxl_backend_func = { 289 .bind = &qxl_ttm_backend_bind, 290 .unbind = &qxl_ttm_backend_unbind, 291 .destroy = &qxl_ttm_backend_destroy, 292 }; 293 294 static struct ttm_tt *qxl_ttm_tt_create(struct ttm_buffer_object *bo, 295 uint32_t page_flags) 296 { 297 struct qxl_device *qdev; 298 struct qxl_ttm_tt *gtt; 299 300 qdev = qxl_get_qdev(bo->bdev); 301 gtt = kzalloc(sizeof(struct qxl_ttm_tt), GFP_KERNEL); 302 if (gtt == NULL) 303 return NULL; 304 gtt->ttm.ttm.func = &qxl_backend_func; 305 gtt->qdev = qdev; 306 if (ttm_dma_tt_init(>t->ttm, bo, page_flags)) { 307 kfree(gtt); 308 return NULL; 309 } 310 return >t->ttm.ttm; 311 } 312 313 static void qxl_move_null(struct ttm_buffer_object *bo, 314 struct ttm_mem_reg *new_mem) 315 { 316 struct ttm_mem_reg *old_mem = &bo->mem; 317 318 BUG_ON(old_mem->mm_node != NULL); 319 *old_mem = *new_mem; 320 new_mem->mm_node = NULL; 321 } 322 323 static int qxl_bo_move(struct ttm_buffer_object *bo, bool evict, 324 struct ttm_operation_ctx *ctx, 325 struct ttm_mem_reg *new_mem) 326 { 327 struct ttm_mem_reg *old_mem = &bo->mem; 328 int ret; 329 330 ret = ttm_bo_wait(bo, ctx->interruptible, ctx->no_wait_gpu); 331 if (ret) 332 return ret; 333 334 335 if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) { 336 qxl_move_null(bo, new_mem); 337 return 0; 338 } 339 return ttm_bo_move_memcpy(bo, ctx, new_mem); 340 } 341 342 static void qxl_bo_move_notify(struct ttm_buffer_object *bo, 343 bool evict, 344 struct ttm_mem_reg *new_mem) 345 { 346 struct qxl_bo *qbo; 347 struct qxl_device *qdev; 348 349 if (!qxl_ttm_bo_is_qxl_bo(bo)) 350 return; 351 qbo = to_qxl_bo(bo); 352 qdev = qbo->gem_base.dev->dev_private; 353 354 if (bo->mem.mem_type == TTM_PL_PRIV && qbo->surface_id) 355 qxl_surface_evict(qdev, qbo, new_mem ? true : false); 356 } 357 358 static struct ttm_bo_driver qxl_bo_driver = { 359 .ttm_tt_create = &qxl_ttm_tt_create, 360 .invalidate_caches = &qxl_invalidate_caches, 361 .init_mem_type = &qxl_init_mem_type, 362 .eviction_valuable = ttm_bo_eviction_valuable, 363 .evict_flags = &qxl_evict_flags, 364 .move = &qxl_bo_move, 365 .verify_access = &qxl_verify_access, 366 .io_mem_reserve = &qxl_ttm_io_mem_reserve, 367 .io_mem_free = &qxl_ttm_io_mem_free, 368 .move_notify = &qxl_bo_move_notify, 369 }; 370 371 int qxl_ttm_init(struct qxl_device *qdev) 372 { 373 int r; 374 int num_io_pages; /* != rom->num_io_pages, we include surface0 */ 375 376 r = qxl_ttm_global_init(qdev); 377 if (r) 378 return r; 379 /* No others user of address space so set it to 0 */ 380 r = ttm_bo_device_init(&qdev->mman.bdev, 381 qdev->mman.bo_global_ref.ref.object, 382 &qxl_bo_driver, 383 qdev->ddev.anon_inode->i_mapping, 384 DRM_FILE_PAGE_OFFSET, 0); 385 if (r) { 386 DRM_ERROR("failed initializing buffer object driver(%d).\n", r); 387 return r; 388 } 389 /* NOTE: this includes the framebuffer (aka surface 0) */ 390 num_io_pages = qdev->rom->ram_header_offset / PAGE_SIZE; 391 r = ttm_bo_init_mm(&qdev->mman.bdev, TTM_PL_VRAM, 392 num_io_pages); 393 if (r) { 394 DRM_ERROR("Failed initializing VRAM heap.\n"); 395 return r; 396 } 397 r = ttm_bo_init_mm(&qdev->mman.bdev, TTM_PL_PRIV, 398 qdev->surfaceram_size / PAGE_SIZE); 399 if (r) { 400 DRM_ERROR("Failed initializing Surfaces heap.\n"); 401 return r; 402 } 403 DRM_INFO("qxl: %uM of VRAM memory size\n", 404 (unsigned)qdev->vram_size / (1024 * 1024)); 405 DRM_INFO("qxl: %luM of IO pages memory ready (VRAM domain)\n", 406 ((unsigned)num_io_pages * PAGE_SIZE) / (1024 * 1024)); 407 DRM_INFO("qxl: %uM of Surface memory size\n", 408 (unsigned)qdev->surfaceram_size / (1024 * 1024)); 409 return 0; 410 } 411 412 void qxl_ttm_fini(struct qxl_device *qdev) 413 { 414 ttm_bo_clean_mm(&qdev->mman.bdev, TTM_PL_VRAM); 415 ttm_bo_clean_mm(&qdev->mman.bdev, TTM_PL_PRIV); 416 ttm_bo_device_release(&qdev->mman.bdev); 417 qxl_ttm_global_fini(qdev); 418 DRM_INFO("qxl: ttm finalized\n"); 419 } 420 421 422 #define QXL_DEBUGFS_MEM_TYPES 2 423 424 #if defined(CONFIG_DEBUG_FS) 425 static int qxl_mm_dump_table(struct seq_file *m, void *data) 426 { 427 struct drm_info_node *node = (struct drm_info_node *)m->private; 428 struct drm_mm *mm = (struct drm_mm *)node->info_ent->data; 429 struct drm_device *dev = node->minor->dev; 430 struct qxl_device *rdev = dev->dev_private; 431 struct ttm_bo_global *glob = rdev->mman.bdev.glob; 432 struct drm_printer p = drm_seq_file_printer(m); 433 434 spin_lock(&glob->lru_lock); 435 drm_mm_print(mm, &p); 436 spin_unlock(&glob->lru_lock); 437 return 0; 438 } 439 #endif 440 441 int qxl_ttm_debugfs_init(struct qxl_device *qdev) 442 { 443 #if defined(CONFIG_DEBUG_FS) 444 static struct drm_info_list qxl_mem_types_list[QXL_DEBUGFS_MEM_TYPES]; 445 static char qxl_mem_types_names[QXL_DEBUGFS_MEM_TYPES][32]; 446 unsigned i; 447 448 for (i = 0; i < QXL_DEBUGFS_MEM_TYPES; i++) { 449 if (i == 0) 450 sprintf(qxl_mem_types_names[i], "qxl_mem_mm"); 451 else 452 sprintf(qxl_mem_types_names[i], "qxl_surf_mm"); 453 qxl_mem_types_list[i].name = qxl_mem_types_names[i]; 454 qxl_mem_types_list[i].show = &qxl_mm_dump_table; 455 qxl_mem_types_list[i].driver_features = 0; 456 if (i == 0) 457 qxl_mem_types_list[i].data = qdev->mman.bdev.man[TTM_PL_VRAM].priv; 458 else 459 qxl_mem_types_list[i].data = qdev->mman.bdev.man[TTM_PL_PRIV].priv; 460 461 } 462 return qxl_debugfs_add_files(qdev, qxl_mem_types_list, i); 463 #else 464 return 0; 465 #endif 466 } 467