1/* 2 * Copyright 2012 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 6 * "Software"), to deal in the Software without restriction, including 7 * without limitation the rights to use, copy, modify, merge, publish, 8 * distribute, sub license, and/or sell copies of the Software, and to 9 * permit persons to whom the Software is furnished to do so, subject to 10 * the following conditions: 11 * 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 13 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 14 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL 15 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, 16 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 17 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE 18 * USE OR OTHER DEALINGS IN THE SOFTWARE. 19 * 20 * The above copyright notice and this permission notice (including the 21 * next paragraph) shall be included in all copies or substantial portions 22 * of the Software. 23 * 24 */ 25/* 26 * Authors: Dave Airlie <airlied@redhat.com> 27 */ 28#include <drm/drmP.h> 29#include "ast_drv.h" 30#include <ttm/ttm_page_alloc.h> 31 32static inline struct ast_private * 33ast_bdev(struct ttm_bo_device *bd) 34{ 35 return container_of(bd, struct ast_private, ttm.bdev); 36} 37 38static int 39ast_ttm_mem_global_init(struct drm_global_reference *ref) 40{ 41 return ttm_mem_global_init(ref->object); 42} 43 44static void 45ast_ttm_mem_global_release(struct drm_global_reference *ref) 46{ 47 ttm_mem_global_release(ref->object); 48} 49 50static int ast_ttm_global_init(struct ast_private *ast) 51{ 52 struct drm_global_reference *global_ref; 53 int r; 54 55 global_ref = &ast->ttm.mem_global_ref; 56 global_ref->global_type = DRM_GLOBAL_TTM_MEM; 57 global_ref->size = sizeof(struct ttm_mem_global); 58 global_ref->init = &ast_ttm_mem_global_init; 59 global_ref->release = &ast_ttm_mem_global_release; 60 r = drm_global_item_ref(global_ref); 61 if (r != 0) { 62 DRM_ERROR("Failed setting up TTM memory accounting " 63 "subsystem.\n"); 64 return r; 65 } 66 67 ast->ttm.bo_global_ref.mem_glob = 68 ast->ttm.mem_global_ref.object; 69 global_ref = &ast->ttm.bo_global_ref.ref; 70 global_ref->global_type = DRM_GLOBAL_TTM_BO; 71 global_ref->size = sizeof(struct ttm_bo_global); 72 global_ref->init = &ttm_bo_global_init; 73 global_ref->release = &ttm_bo_global_release; 74 r = drm_global_item_ref(global_ref); 75 if (r != 0) { 76 DRM_ERROR("Failed setting up TTM BO subsystem.\n"); 77 drm_global_item_unref(&ast->ttm.mem_global_ref); 78 return r; 79 } 80 return 0; 81} 82 83static void 84ast_ttm_global_release(struct ast_private *ast) 85{ 86 if (ast->ttm.mem_global_ref.release == NULL) 87 return; 88 89 drm_global_item_unref(&ast->ttm.bo_global_ref.ref); 90 drm_global_item_unref(&ast->ttm.mem_global_ref); 91 ast->ttm.mem_global_ref.release = NULL; 92} 93 94 95static void ast_bo_ttm_destroy(struct ttm_buffer_object *tbo) 96{ 97 struct ast_bo *bo; 98 99 bo = container_of(tbo, struct ast_bo, bo); 100 101 drm_gem_object_release(&bo->gem); 102 kfree(bo); 103} 104 105static bool ast_ttm_bo_is_ast_bo(struct ttm_buffer_object *bo) 106{ 107 if (bo->destroy == &ast_bo_ttm_destroy) 108 return true; 109 return false; 110} 111 112static int 113ast_bo_init_mem_type(struct ttm_bo_device *bdev, uint32_t type, 114 struct ttm_mem_type_manager *man) 115{ 116 switch (type) { 117 case TTM_PL_SYSTEM: 118 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE; 119 man->available_caching = TTM_PL_MASK_CACHING; 120 man->default_caching = TTM_PL_FLAG_CACHED; 121 break; 122 case TTM_PL_VRAM: 123 man->func = &ttm_bo_manager_func; 124 man->flags = TTM_MEMTYPE_FLAG_FIXED | 125 TTM_MEMTYPE_FLAG_MAPPABLE; 126 man->available_caching = TTM_PL_FLAG_UNCACHED | 127 TTM_PL_FLAG_WC; 128 man->default_caching = TTM_PL_FLAG_WC; 129 break; 130 default: 131 DRM_ERROR("Unsupported memory type %u\n", (unsigned)type); 132 return -EINVAL; 133 } 134 return 0; 135} 136 137static void 138ast_bo_evict_flags(struct ttm_buffer_object *bo, struct ttm_placement *pl) 139{ 140 struct ast_bo *astbo = ast_bo(bo); 141 142 if (!ast_ttm_bo_is_ast_bo(bo)) 143 return; 144 145 ast_ttm_placement(astbo, TTM_PL_FLAG_SYSTEM); 146 *pl = astbo->placement; 147} 148 149static int ast_bo_verify_access(struct ttm_buffer_object *bo, struct file *filp) 150{ 151 struct ast_bo *astbo = ast_bo(bo); 152 153 return drm_vma_node_verify_access(&astbo->gem.vma_node, filp); 154} 155 156static int ast_ttm_io_mem_reserve(struct ttm_bo_device *bdev, 157 struct ttm_mem_reg *mem) 158{ 159 struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; 160 struct ast_private *ast = ast_bdev(bdev); 161 162 mem->bus.addr = NULL; 163 mem->bus.offset = 0; 164 mem->bus.size = mem->num_pages << PAGE_SHIFT; 165 mem->bus.base = 0; 166 mem->bus.is_iomem = false; 167 if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE)) 168 return -EINVAL; 169 switch (mem->mem_type) { 170 case TTM_PL_SYSTEM: 171 /* system memory */ 172 return 0; 173 case TTM_PL_VRAM: 174 mem->bus.offset = mem->start << PAGE_SHIFT; 175 mem->bus.base = pci_resource_start(ast->dev->pdev, 0); 176 mem->bus.is_iomem = true; 177 break; 178 default: 179 return -EINVAL; 180 break; 181 } 182 return 0; 183} 184 185static void ast_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem) 186{ 187} 188 189static int ast_bo_move(struct ttm_buffer_object *bo, 190 bool evict, bool interruptible, 191 bool no_wait_gpu, 192 struct ttm_mem_reg *new_mem) 193{ 194 int r; 195 r = ttm_bo_move_memcpy(bo, evict, no_wait_gpu, new_mem); 196 return r; 197} 198 199 200static void ast_ttm_backend_destroy(struct ttm_tt *tt) 201{ 202 ttm_tt_fini(tt); 203 kfree(tt); 204} 205 206static struct ttm_backend_func ast_tt_backend_func = { 207 .destroy = &ast_ttm_backend_destroy, 208}; 209 210 211static struct ttm_tt *ast_ttm_tt_create(struct ttm_bo_device *bdev, 212 unsigned long size, uint32_t page_flags, 213 struct page *dummy_read_page) 214{ 215 struct ttm_tt *tt; 216 217 tt = kzalloc(sizeof(struct ttm_tt), GFP_KERNEL); 218 if (tt == NULL) 219 return NULL; 220 tt->func = &ast_tt_backend_func; 221 if (ttm_tt_init(tt, bdev, size, page_flags, dummy_read_page)) { 222 kfree(tt); 223 return NULL; 224 } 225 return tt; 226} 227 228static int ast_ttm_tt_populate(struct ttm_tt *ttm) 229{ 230 return ttm_pool_populate(ttm); 231} 232 233static void ast_ttm_tt_unpopulate(struct ttm_tt *ttm) 234{ 235 ttm_pool_unpopulate(ttm); 236} 237 238struct ttm_bo_driver ast_bo_driver = { 239 .ttm_tt_create = ast_ttm_tt_create, 240 .ttm_tt_populate = ast_ttm_tt_populate, 241 .ttm_tt_unpopulate = ast_ttm_tt_unpopulate, 242 .init_mem_type = ast_bo_init_mem_type, 243 .evict_flags = ast_bo_evict_flags, 244 .move = ast_bo_move, 245 .verify_access = ast_bo_verify_access, 246 .io_mem_reserve = &ast_ttm_io_mem_reserve, 247 .io_mem_free = &ast_ttm_io_mem_free, 248}; 249 250int ast_mm_init(struct ast_private *ast) 251{ 252 int ret; 253 struct drm_device *dev = ast->dev; 254 struct ttm_bo_device *bdev = &ast->ttm.bdev; 255 256 ret = ast_ttm_global_init(ast); 257 if (ret) 258 return ret; 259 260 ret = ttm_bo_device_init(&ast->ttm.bdev, 261 ast->ttm.bo_global_ref.ref.object, 262 &ast_bo_driver, 263 dev->anon_inode->i_mapping, 264 DRM_FILE_PAGE_OFFSET, 265 true); 266 if (ret) { 267 DRM_ERROR("Error initialising bo driver; %d\n", ret); 268 return ret; 269 } 270 271 ret = ttm_bo_init_mm(bdev, TTM_PL_VRAM, 272 ast->vram_size >> PAGE_SHIFT); 273 if (ret) { 274 DRM_ERROR("Failed ttm VRAM init: %d\n", ret); 275 return ret; 276 } 277 278 ast->fb_mtrr = arch_phys_wc_add(pci_resource_start(dev->pdev, 0), 279 pci_resource_len(dev->pdev, 0)); 280 281 return 0; 282} 283 284void ast_mm_fini(struct ast_private *ast) 285{ 286 ttm_bo_device_release(&ast->ttm.bdev); 287 288 ast_ttm_global_release(ast); 289 290 arch_phys_wc_del(ast->fb_mtrr); 291} 292 293void ast_ttm_placement(struct ast_bo *bo, int domain) 294{ 295 u32 c = 0; 296 unsigned i; 297 298 bo->placement.placement = bo->placements; 299 bo->placement.busy_placement = bo->placements; 300 if (domain & TTM_PL_FLAG_VRAM) 301 bo->placements[c++].flags = TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_VRAM; 302 if (domain & TTM_PL_FLAG_SYSTEM) 303 bo->placements[c++].flags = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_SYSTEM; 304 if (!c) 305 bo->placements[c++].flags = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_SYSTEM; 306 bo->placement.num_placement = c; 307 bo->placement.num_busy_placement = c; 308 for (i = 0; i < c; ++i) { 309 bo->placements[i].fpfn = 0; 310 bo->placements[i].lpfn = 0; 311 } 312} 313 314int ast_bo_create(struct drm_device *dev, int size, int align, 315 uint32_t flags, struct ast_bo **pastbo) 316{ 317 struct ast_private *ast = dev->dev_private; 318 struct ast_bo *astbo; 319 size_t acc_size; 320 int ret; 321 322 astbo = kzalloc(sizeof(struct ast_bo), GFP_KERNEL); 323 if (!astbo) 324 return -ENOMEM; 325 326 ret = drm_gem_object_init(dev, &astbo->gem, size); 327 if (ret) { 328 kfree(astbo); 329 return ret; 330 } 331 332 astbo->bo.bdev = &ast->ttm.bdev; 333 334 ast_ttm_placement(astbo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM); 335 336 acc_size = ttm_bo_dma_acc_size(&ast->ttm.bdev, size, 337 sizeof(struct ast_bo)); 338 339 ret = ttm_bo_init(&ast->ttm.bdev, &astbo->bo, size, 340 ttm_bo_type_device, &astbo->placement, 341 align >> PAGE_SHIFT, false, NULL, acc_size, 342 NULL, NULL, ast_bo_ttm_destroy); 343 if (ret) 344 return ret; 345 346 *pastbo = astbo; 347 return 0; 348} 349 350static inline u64 ast_bo_gpu_offset(struct ast_bo *bo) 351{ 352 return bo->bo.offset; 353} 354 355int ast_bo_pin(struct ast_bo *bo, u32 pl_flag, u64 *gpu_addr) 356{ 357 int i, ret; 358 359 if (bo->pin_count) { 360 bo->pin_count++; 361 if (gpu_addr) 362 *gpu_addr = ast_bo_gpu_offset(bo); 363 } 364 365 ast_ttm_placement(bo, pl_flag); 366 for (i = 0; i < bo->placement.num_placement; i++) 367 bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT; 368 ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false); 369 if (ret) 370 return ret; 371 372 bo->pin_count = 1; 373 if (gpu_addr) 374 *gpu_addr = ast_bo_gpu_offset(bo); 375 return 0; 376} 377 378int ast_bo_unpin(struct ast_bo *bo) 379{ 380 int i, ret; 381 if (!bo->pin_count) { 382 DRM_ERROR("unpin bad %p\n", bo); 383 return 0; 384 } 385 bo->pin_count--; 386 if (bo->pin_count) 387 return 0; 388 389 for (i = 0; i < bo->placement.num_placement ; i++) 390 bo->placements[i].flags &= ~TTM_PL_FLAG_NO_EVICT; 391 ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false); 392 if (ret) 393 return ret; 394 395 return 0; 396} 397 398int ast_bo_push_sysram(struct ast_bo *bo) 399{ 400 int i, ret; 401 if (!bo->pin_count) { 402 DRM_ERROR("unpin bad %p\n", bo); 403 return 0; 404 } 405 bo->pin_count--; 406 if (bo->pin_count) 407 return 0; 408 409 if (bo->kmap.virtual) 410 ttm_bo_kunmap(&bo->kmap); 411 412 ast_ttm_placement(bo, TTM_PL_FLAG_SYSTEM); 413 for (i = 0; i < bo->placement.num_placement ; i++) 414 bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT; 415 416 ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false); 417 if (ret) { 418 DRM_ERROR("pushing to VRAM failed\n"); 419 return ret; 420 } 421 return 0; 422} 423 424int ast_mmap(struct file *filp, struct vm_area_struct *vma) 425{ 426 struct drm_file *file_priv; 427 struct ast_private *ast; 428 429 if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET)) 430 return -EINVAL; 431 432 file_priv = filp->private_data; 433 ast = file_priv->minor->dev->dev_private; 434 return ttm_bo_mmap(filp, vma, &ast->ttm.bdev); 435} 436