1/************************************************************************** 2 * 3 * Copyright �� 2012-2015 VMware, Inc., Palo Alto, CA., USA 4 * All Rights Reserved. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the 8 * "Software"), to deal in the Software without restriction, including 9 * without limitation the rights to use, copy, modify, merge, publish, 10 * distribute, sub license, and/or sell copies of the Software, and to 11 * permit persons to whom the Software is furnished to do so, subject to 12 * the following conditions: 13 * 14 * The above copyright notice and this permission notice (including the 15 * next paragraph) shall be included in all copies or substantial portions 16 * of the Software. 17 * 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 20 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL 21 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, 22 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 23 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE 24 * USE OR OTHER DEALINGS IN THE SOFTWARE. 25 * 26 **************************************************************************/ 27 28#include "vmwgfx_drv.h" 29 30/* 31 * If we set up the screen target otable, screen objects stop working. 32 */ 33 34#define VMW_OTABLE_SETUP_SUB ((VMWGFX_ENABLE_SCREEN_TARGET_OTABLE ? 0 : 1)) 35 36#ifdef CONFIG_64BIT 37#define VMW_PPN_SIZE 8 38#define VMW_MOBFMT_PTDEPTH_0 SVGA3D_MOBFMT_PTDEPTH64_0 39#define VMW_MOBFMT_PTDEPTH_1 SVGA3D_MOBFMT_PTDEPTH64_1 40#define VMW_MOBFMT_PTDEPTH_2 SVGA3D_MOBFMT_PTDEPTH64_2 41#else 42#define VMW_PPN_SIZE 4 43#define VMW_MOBFMT_PTDEPTH_0 SVGA3D_MOBFMT_PTDEPTH_0 44#define VMW_MOBFMT_PTDEPTH_1 SVGA3D_MOBFMT_PTDEPTH_1 45#define VMW_MOBFMT_PTDEPTH_2 SVGA3D_MOBFMT_PTDEPTH_2 46#endif 47 48/* 49 * struct vmw_mob - Structure containing page table and metadata for a 50 * Guest Memory OBject. 51 * 52 * @num_pages Number of pages that make up the page table. 53 * @pt_level The indirection level of the page table. 0-2. 54 * @pt_root_page DMA address of the level 0 page of the page table. 55 */ 56struct vmw_mob { 57 struct ttm_buffer_object *pt_bo; 58 unsigned long num_pages; 59 unsigned pt_level; 60 dma_addr_t pt_root_page; 61 uint32_t id; 62}; 63 64/* 65 * struct vmw_otable - Guest Memory OBject table metadata 66 * 67 * @size: Size of the table (page-aligned). 68 * @page_table: Pointer to a struct vmw_mob holding the page table. 69 */ 70static const struct vmw_otable pre_dx_tables[] = { 71 {VMWGFX_NUM_MOB * SVGA3D_OTABLE_MOB_ENTRY_SIZE, NULL, true}, 72 {VMWGFX_NUM_GB_SURFACE * SVGA3D_OTABLE_SURFACE_ENTRY_SIZE, NULL, true}, 73 {VMWGFX_NUM_GB_CONTEXT * SVGA3D_OTABLE_CONTEXT_ENTRY_SIZE, NULL, true}, 74 {VMWGFX_NUM_GB_SHADER * SVGA3D_OTABLE_SHADER_ENTRY_SIZE, NULL, true}, 75 {VMWGFX_NUM_GB_SCREEN_TARGET * SVGA3D_OTABLE_SCREEN_TARGET_ENTRY_SIZE, 76 NULL, VMWGFX_ENABLE_SCREEN_TARGET_OTABLE} 77}; 78 79static const struct vmw_otable dx_tables[] = { 80 {VMWGFX_NUM_MOB * SVGA3D_OTABLE_MOB_ENTRY_SIZE, NULL, true}, 81 {VMWGFX_NUM_GB_SURFACE * SVGA3D_OTABLE_SURFACE_ENTRY_SIZE, NULL, true}, 82 {VMWGFX_NUM_GB_CONTEXT * SVGA3D_OTABLE_CONTEXT_ENTRY_SIZE, NULL, true}, 83 {VMWGFX_NUM_GB_SHADER * SVGA3D_OTABLE_SHADER_ENTRY_SIZE, NULL, true}, 84 {VMWGFX_NUM_GB_SCREEN_TARGET * SVGA3D_OTABLE_SCREEN_TARGET_ENTRY_SIZE, 85 NULL, VMWGFX_ENABLE_SCREEN_TARGET_OTABLE}, 86 {VMWGFX_NUM_DXCONTEXT * sizeof(SVGAOTableDXContextEntry), NULL, true}, 87}; 88 89static int vmw_mob_pt_populate(struct vmw_private *dev_priv, 90 struct vmw_mob *mob); 91static void vmw_mob_pt_setup(struct vmw_mob *mob, 92 struct vmw_piter data_iter, 93 unsigned long num_data_pages); 94 95/* 96 * vmw_setup_otable_base - Issue an object table base setup command to 97 * the device 98 * 99 * @dev_priv: Pointer to a device private structure 100 * @type: Type of object table base 101 * @offset Start of table offset into dev_priv::otable_bo 102 * @otable Pointer to otable metadata; 103 * 104 * This function returns -ENOMEM if it fails to reserve fifo space, 105 * and may block waiting for fifo space. 106 */ 107static int vmw_setup_otable_base(struct vmw_private *dev_priv, 108 SVGAOTableType type, 109 struct ttm_buffer_object *otable_bo, 110 unsigned long offset, 111 struct vmw_otable *otable) 112{ 113 struct { 114 SVGA3dCmdHeader header; 115 SVGA3dCmdSetOTableBase64 body; 116 } *cmd; 117 struct vmw_mob *mob; 118 const struct vmw_sg_table *vsgt; 119 struct vmw_piter iter; 120 int ret; 121 122 BUG_ON(otable->page_table != NULL); 123 124 vsgt = vmw_bo_sg_table(otable_bo); 125 vmw_piter_start(&iter, vsgt, offset >> PAGE_SHIFT); 126 WARN_ON(!vmw_piter_next(&iter)); 127 128 mob = vmw_mob_create(otable->size >> PAGE_SHIFT); 129 if (unlikely(mob == NULL)) { 130 DRM_ERROR("Failed creating OTable page table.\n"); 131 return -ENOMEM; 132 } 133 134 if (otable->size <= PAGE_SIZE) { 135 mob->pt_level = VMW_MOBFMT_PTDEPTH_0; 136 mob->pt_root_page = vmw_piter_dma_addr(&iter); 137 } else if (vsgt->num_regions == 1) { 138 mob->pt_level = SVGA3D_MOBFMT_RANGE; 139 mob->pt_root_page = vmw_piter_dma_addr(&iter); 140 } else { 141 ret = vmw_mob_pt_populate(dev_priv, mob); 142 if (unlikely(ret != 0)) 143 goto out_no_populate; 144 145 vmw_mob_pt_setup(mob, iter, otable->size >> PAGE_SHIFT); 146 mob->pt_level += VMW_MOBFMT_PTDEPTH_1 - SVGA3D_MOBFMT_PTDEPTH_1; 147 } 148 149 cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd)); 150 if (unlikely(cmd == NULL)) { 151 DRM_ERROR("Failed reserving FIFO space for OTable setup.\n"); 152 ret = -ENOMEM; 153 goto out_no_fifo; 154 } 155 156 memset(cmd, 0, sizeof(*cmd)); 157 cmd->header.id = SVGA_3D_CMD_SET_OTABLE_BASE64; 158 cmd->header.size = sizeof(cmd->body); 159 cmd->body.type = type; 160 cmd->body.baseAddress = mob->pt_root_page >> PAGE_SHIFT; 161 cmd->body.sizeInBytes = otable->size; 162 cmd->body.validSizeInBytes = 0; 163 cmd->body.ptDepth = mob->pt_level; 164 165 /* 166 * The device doesn't support this, But the otable size is 167 * determined at compile-time, so this BUG shouldn't trigger 168 * randomly. 169 */ 170 BUG_ON(mob->pt_level == VMW_MOBFMT_PTDEPTH_2); 171 172 vmw_fifo_commit(dev_priv, sizeof(*cmd)); 173 otable->page_table = mob; 174 175 return 0; 176 177out_no_fifo: 178out_no_populate: 179 vmw_mob_destroy(mob); 180 return ret; 181} 182 183/* 184 * vmw_takedown_otable_base - Issue an object table base takedown command 185 * to the device 186 * 187 * @dev_priv: Pointer to a device private structure 188 * @type: Type of object table base 189 * 190 */ 191static void vmw_takedown_otable_base(struct vmw_private *dev_priv, 192 SVGAOTableType type, 193 struct vmw_otable *otable) 194{ 195 struct { 196 SVGA3dCmdHeader header; 197 SVGA3dCmdSetOTableBase body; 198 } *cmd; 199 struct ttm_buffer_object *bo; 200 201 if (otable->page_table == NULL) 202 return; 203 204 bo = otable->page_table->pt_bo; 205 cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd)); 206 if (unlikely(cmd == NULL)) { 207 DRM_ERROR("Failed reserving FIFO space for OTable " 208 "takedown.\n"); 209 return; 210 } 211 212 memset(cmd, 0, sizeof(*cmd)); 213 cmd->header.id = SVGA_3D_CMD_SET_OTABLE_BASE; 214 cmd->header.size = sizeof(cmd->body); 215 cmd->body.type = type; 216 cmd->body.baseAddress = 0; 217 cmd->body.sizeInBytes = 0; 218 cmd->body.validSizeInBytes = 0; 219 cmd->body.ptDepth = SVGA3D_MOBFMT_INVALID; 220 vmw_fifo_commit(dev_priv, sizeof(*cmd)); 221 222 if (bo) { 223 int ret; 224 225 ret = ttm_bo_reserve(bo, false, true, false, NULL); 226 BUG_ON(ret != 0); 227 228 vmw_fence_single_bo(bo, NULL); 229 ttm_bo_unreserve(bo); 230 } 231 232 vmw_mob_destroy(otable->page_table); 233 otable->page_table = NULL; 234} 235 236 237static int vmw_otable_batch_setup(struct vmw_private *dev_priv, 238 struct vmw_otable_batch *batch) 239{ 240 unsigned long offset; 241 unsigned long bo_size; 242 struct vmw_otable *otables = batch->otables; 243 SVGAOTableType i; 244 int ret; 245 246 bo_size = 0; 247 for (i = 0; i < batch->num_otables; ++i) { 248 if (!otables[i].enabled) 249 continue; 250 251 otables[i].size = 252 (otables[i].size + PAGE_SIZE - 1) & PAGE_MASK; 253 bo_size += otables[i].size; 254 } 255 256 ret = ttm_bo_create(&dev_priv->bdev, bo_size, 257 ttm_bo_type_device, 258 &vmw_sys_ne_placement, 259 0, false, NULL, 260 &batch->otable_bo); 261 262 if (unlikely(ret != 0)) 263 goto out_no_bo; 264 265 ret = ttm_bo_reserve(batch->otable_bo, false, true, false, NULL); 266 BUG_ON(ret != 0); 267 ret = vmw_bo_driver.ttm_tt_populate(batch->otable_bo->ttm); 268 if (unlikely(ret != 0)) 269 goto out_unreserve; 270 ret = vmw_bo_map_dma(batch->otable_bo); 271 if (unlikely(ret != 0)) 272 goto out_unreserve; 273 274 ttm_bo_unreserve(batch->otable_bo); 275 276 offset = 0; 277 for (i = 0; i < batch->num_otables; ++i) { 278 if (!batch->otables[i].enabled) 279 continue; 280 281 ret = vmw_setup_otable_base(dev_priv, i, batch->otable_bo, 282 offset, 283 &otables[i]); 284 if (unlikely(ret != 0)) 285 goto out_no_setup; 286 offset += otables[i].size; 287 } 288 289 return 0; 290 291out_unreserve: 292 ttm_bo_unreserve(batch->otable_bo); 293out_no_setup: 294 for (i = 0; i < batch->num_otables; ++i) { 295 if (batch->otables[i].enabled) 296 vmw_takedown_otable_base(dev_priv, i, 297 &batch->otables[i]); 298 } 299 300 ttm_bo_unref(&batch->otable_bo); 301out_no_bo: 302 return ret; 303} 304 305/* 306 * vmw_otables_setup - Set up guest backed memory object tables 307 * 308 * @dev_priv: Pointer to a device private structure 309 * 310 * Takes care of the device guest backed surface 311 * initialization, by setting up the guest backed memory object tables. 312 * Returns 0 on success and various error codes on failure. A successful return 313 * means the object tables can be taken down using the vmw_otables_takedown 314 * function. 315 */ 316int vmw_otables_setup(struct vmw_private *dev_priv) 317{ 318 struct vmw_otable **otables = &dev_priv->otable_batch.otables; 319 int ret; 320 321 if (dev_priv->has_dx) { 322 *otables = kmalloc(sizeof(dx_tables), GFP_KERNEL); 323 if (*otables == NULL) 324 return -ENOMEM; 325 326 memcpy(*otables, dx_tables, sizeof(dx_tables)); 327 dev_priv->otable_batch.num_otables = ARRAY_SIZE(dx_tables); 328 } else { 329 *otables = kmalloc(sizeof(pre_dx_tables), GFP_KERNEL); 330 if (*otables == NULL) 331 return -ENOMEM; 332 333 memcpy(*otables, pre_dx_tables, sizeof(pre_dx_tables)); 334 dev_priv->otable_batch.num_otables = ARRAY_SIZE(pre_dx_tables); 335 } 336 337 ret = vmw_otable_batch_setup(dev_priv, &dev_priv->otable_batch); 338 if (unlikely(ret != 0)) 339 goto out_setup; 340 341 return 0; 342 343out_setup: 344 kfree(*otables); 345 return ret; 346} 347 348static void vmw_otable_batch_takedown(struct vmw_private *dev_priv, 349 struct vmw_otable_batch *batch) 350{ 351 SVGAOTableType i; 352 struct ttm_buffer_object *bo = batch->otable_bo; 353 int ret; 354 355 for (i = 0; i < batch->num_otables; ++i) 356 if (batch->otables[i].enabled) 357 vmw_takedown_otable_base(dev_priv, i, 358 &batch->otables[i]); 359 360 ret = ttm_bo_reserve(bo, false, true, false, NULL); 361 BUG_ON(ret != 0); 362 363 vmw_fence_single_bo(bo, NULL); 364 ttm_bo_unreserve(bo); 365 366 ttm_bo_unref(&batch->otable_bo); 367} 368 369/* 370 * vmw_otables_takedown - Take down guest backed memory object tables 371 * 372 * @dev_priv: Pointer to a device private structure 373 * 374 * Take down the Guest Memory Object tables. 375 */ 376void vmw_otables_takedown(struct vmw_private *dev_priv) 377{ 378 vmw_otable_batch_takedown(dev_priv, &dev_priv->otable_batch); 379 kfree(dev_priv->otable_batch.otables); 380} 381 382/* 383 * vmw_mob_calculate_pt_pages - Calculate the number of page table pages 384 * needed for a guest backed memory object. 385 * 386 * @data_pages: Number of data pages in the memory object buffer. 387 */ 388static unsigned long vmw_mob_calculate_pt_pages(unsigned long data_pages) 389{ 390 unsigned long data_size = data_pages * PAGE_SIZE; 391 unsigned long tot_size = 0; 392 393 while (likely(data_size > PAGE_SIZE)) { 394 data_size = DIV_ROUND_UP(data_size, PAGE_SIZE); 395 data_size *= VMW_PPN_SIZE; 396 tot_size += (data_size + PAGE_SIZE - 1) & PAGE_MASK; 397 } 398 399 return tot_size >> PAGE_SHIFT; 400} 401 402/* 403 * vmw_mob_create - Create a mob, but don't populate it. 404 * 405 * @data_pages: Number of data pages of the underlying buffer object. 406 */ 407struct vmw_mob *vmw_mob_create(unsigned long data_pages) 408{ 409 struct vmw_mob *mob = kzalloc(sizeof(*mob), GFP_KERNEL); 410 411 if (unlikely(mob == NULL)) 412 return NULL; 413 414 mob->num_pages = vmw_mob_calculate_pt_pages(data_pages); 415 416 return mob; 417} 418 419/* 420 * vmw_mob_pt_populate - Populate the mob pagetable 421 * 422 * @mob: Pointer to the mob the pagetable of which we want to 423 * populate. 424 * 425 * This function allocates memory to be used for the pagetable, and 426 * adjusts TTM memory accounting accordingly. Returns ENOMEM if 427 * memory resources aren't sufficient and may cause TTM buffer objects 428 * to be swapped out by using the TTM memory accounting function. 429 */ 430static int vmw_mob_pt_populate(struct vmw_private *dev_priv, 431 struct vmw_mob *mob) 432{ 433 int ret; 434 BUG_ON(mob->pt_bo != NULL); 435 436 ret = ttm_bo_create(&dev_priv->bdev, mob->num_pages * PAGE_SIZE, 437 ttm_bo_type_device, 438 &vmw_sys_ne_placement, 439 0, false, NULL, &mob->pt_bo); 440 if (unlikely(ret != 0)) 441 return ret; 442 443 ret = ttm_bo_reserve(mob->pt_bo, false, true, false, NULL); 444 445 BUG_ON(ret != 0); 446 ret = vmw_bo_driver.ttm_tt_populate(mob->pt_bo->ttm); 447 if (unlikely(ret != 0)) 448 goto out_unreserve; 449 ret = vmw_bo_map_dma(mob->pt_bo); 450 if (unlikely(ret != 0)) 451 goto out_unreserve; 452 453 ttm_bo_unreserve(mob->pt_bo); 454 455 return 0; 456 457out_unreserve: 458 ttm_bo_unreserve(mob->pt_bo); 459 ttm_bo_unref(&mob->pt_bo); 460 461 return ret; 462} 463 464/** 465 * vmw_mob_assign_ppn - Assign a value to a page table entry 466 * 467 * @addr: Pointer to pointer to page table entry. 468 * @val: The page table entry 469 * 470 * Assigns a value to a page table entry pointed to by *@addr and increments 471 * *@addr according to the page table entry size. 472 */ 473#if (VMW_PPN_SIZE == 8) 474static void vmw_mob_assign_ppn(u32 **addr, dma_addr_t val) 475{ 476 *((u64 *) *addr) = val >> PAGE_SHIFT; 477 *addr += 2; 478} 479#else 480static void vmw_mob_assign_ppn(u32 **addr, dma_addr_t val) 481{ 482 *(*addr)++ = val >> PAGE_SHIFT; 483} 484#endif 485 486/* 487 * vmw_mob_build_pt - Build a pagetable 488 * 489 * @data_addr: Array of DMA addresses to the underlying buffer 490 * object's data pages. 491 * @num_data_pages: Number of buffer object data pages. 492 * @pt_pages: Array of page pointers to the page table pages. 493 * 494 * Returns the number of page table pages actually used. 495 * Uses atomic kmaps of highmem pages to avoid TLB thrashing. 496 */ 497static unsigned long vmw_mob_build_pt(struct vmw_piter *data_iter, 498 unsigned long num_data_pages, 499 struct vmw_piter *pt_iter) 500{ 501 unsigned long pt_size = num_data_pages * VMW_PPN_SIZE; 502 unsigned long num_pt_pages = DIV_ROUND_UP(pt_size, PAGE_SIZE); 503 unsigned long pt_page; 504 u32 *addr, *save_addr; 505 unsigned long i; 506 struct page *page; 507 508 for (pt_page = 0; pt_page < num_pt_pages; ++pt_page) { 509 page = vmw_piter_page(pt_iter); 510 511 save_addr = addr = kmap_atomic(page); 512 513 for (i = 0; i < PAGE_SIZE / VMW_PPN_SIZE; ++i) { 514 vmw_mob_assign_ppn(&addr, 515 vmw_piter_dma_addr(data_iter)); 516 if (unlikely(--num_data_pages == 0)) 517 break; 518 WARN_ON(!vmw_piter_next(data_iter)); 519 } 520 kunmap_atomic(save_addr); 521 vmw_piter_next(pt_iter); 522 } 523 524 return num_pt_pages; 525} 526 527/* 528 * vmw_mob_build_pt - Set up a multilevel mob pagetable 529 * 530 * @mob: Pointer to a mob whose page table needs setting up. 531 * @data_addr Array of DMA addresses to the buffer object's data 532 * pages. 533 * @num_data_pages: Number of buffer object data pages. 534 * 535 * Uses tail recursion to set up a multilevel mob page table. 536 */ 537static void vmw_mob_pt_setup(struct vmw_mob *mob, 538 struct vmw_piter data_iter, 539 unsigned long num_data_pages) 540{ 541 unsigned long num_pt_pages = 0; 542 struct ttm_buffer_object *bo = mob->pt_bo; 543 struct vmw_piter save_pt_iter; 544 struct vmw_piter pt_iter; 545 const struct vmw_sg_table *vsgt; 546 int ret; 547 548 ret = ttm_bo_reserve(bo, false, true, false, NULL); 549 BUG_ON(ret != 0); 550 551 vsgt = vmw_bo_sg_table(bo); 552 vmw_piter_start(&pt_iter, vsgt, 0); 553 BUG_ON(!vmw_piter_next(&pt_iter)); 554 mob->pt_level = 0; 555 while (likely(num_data_pages > 1)) { 556 ++mob->pt_level; 557 BUG_ON(mob->pt_level > 2); 558 save_pt_iter = pt_iter; 559 num_pt_pages = vmw_mob_build_pt(&data_iter, num_data_pages, 560 &pt_iter); 561 data_iter = save_pt_iter; 562 num_data_pages = num_pt_pages; 563 } 564 565 mob->pt_root_page = vmw_piter_dma_addr(&save_pt_iter); 566 ttm_bo_unreserve(bo); 567} 568 569/* 570 * vmw_mob_destroy - Destroy a mob, unpopulating first if necessary. 571 * 572 * @mob: Pointer to a mob to destroy. 573 */ 574void vmw_mob_destroy(struct vmw_mob *mob) 575{ 576 if (mob->pt_bo) 577 ttm_bo_unref(&mob->pt_bo); 578 kfree(mob); 579} 580 581/* 582 * vmw_mob_unbind - Hide a mob from the device. 583 * 584 * @dev_priv: Pointer to a device private. 585 * @mob_id: Device id of the mob to unbind. 586 */ 587void vmw_mob_unbind(struct vmw_private *dev_priv, 588 struct vmw_mob *mob) 589{ 590 struct { 591 SVGA3dCmdHeader header; 592 SVGA3dCmdDestroyGBMob body; 593 } *cmd; 594 int ret; 595 struct ttm_buffer_object *bo = mob->pt_bo; 596 597 if (bo) { 598 ret = ttm_bo_reserve(bo, false, true, false, NULL); 599 /* 600 * Noone else should be using this buffer. 601 */ 602 BUG_ON(ret != 0); 603 } 604 605 cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd)); 606 if (unlikely(cmd == NULL)) { 607 DRM_ERROR("Failed reserving FIFO space for Memory " 608 "Object unbinding.\n"); 609 } else { 610 cmd->header.id = SVGA_3D_CMD_DESTROY_GB_MOB; 611 cmd->header.size = sizeof(cmd->body); 612 cmd->body.mobid = mob->id; 613 vmw_fifo_commit(dev_priv, sizeof(*cmd)); 614 } 615 if (bo) { 616 vmw_fence_single_bo(bo, NULL); 617 ttm_bo_unreserve(bo); 618 } 619 vmw_fifo_resource_dec(dev_priv); 620} 621 622/* 623 * vmw_mob_bind - Make a mob visible to the device after first 624 * populating it if necessary. 625 * 626 * @dev_priv: Pointer to a device private. 627 * @mob: Pointer to the mob we're making visible. 628 * @data_addr: Array of DMA addresses to the data pages of the underlying 629 * buffer object. 630 * @num_data_pages: Number of data pages of the underlying buffer 631 * object. 632 * @mob_id: Device id of the mob to bind 633 * 634 * This function is intended to be interfaced with the ttm_tt backend 635 * code. 636 */ 637int vmw_mob_bind(struct vmw_private *dev_priv, 638 struct vmw_mob *mob, 639 const struct vmw_sg_table *vsgt, 640 unsigned long num_data_pages, 641 int32_t mob_id) 642{ 643 int ret; 644 bool pt_set_up = false; 645 struct vmw_piter data_iter; 646 struct { 647 SVGA3dCmdHeader header; 648 SVGA3dCmdDefineGBMob64 body; 649 } *cmd; 650 651 mob->id = mob_id; 652 vmw_piter_start(&data_iter, vsgt, 0); 653 if (unlikely(!vmw_piter_next(&data_iter))) 654 return 0; 655 656 if (likely(num_data_pages == 1)) { 657 mob->pt_level = VMW_MOBFMT_PTDEPTH_0; 658 mob->pt_root_page = vmw_piter_dma_addr(&data_iter); 659 } else if (vsgt->num_regions == 1) { 660 mob->pt_level = SVGA3D_MOBFMT_RANGE; 661 mob->pt_root_page = vmw_piter_dma_addr(&data_iter); 662 } else if (unlikely(mob->pt_bo == NULL)) { 663 ret = vmw_mob_pt_populate(dev_priv, mob); 664 if (unlikely(ret != 0)) 665 return ret; 666 667 vmw_mob_pt_setup(mob, data_iter, num_data_pages); 668 pt_set_up = true; 669 mob->pt_level += VMW_MOBFMT_PTDEPTH_1 - SVGA3D_MOBFMT_PTDEPTH_1; 670 } 671 672 vmw_fifo_resource_inc(dev_priv); 673 674 cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd)); 675 if (unlikely(cmd == NULL)) { 676 DRM_ERROR("Failed reserving FIFO space for Memory " 677 "Object binding.\n"); 678 goto out_no_cmd_space; 679 } 680 681 cmd->header.id = SVGA_3D_CMD_DEFINE_GB_MOB64; 682 cmd->header.size = sizeof(cmd->body); 683 cmd->body.mobid = mob_id; 684 cmd->body.ptDepth = mob->pt_level; 685 cmd->body.base = mob->pt_root_page >> PAGE_SHIFT; 686 cmd->body.sizeInBytes = num_data_pages * PAGE_SIZE; 687 688 vmw_fifo_commit(dev_priv, sizeof(*cmd)); 689 690 return 0; 691 692out_no_cmd_space: 693 vmw_fifo_resource_dec(dev_priv); 694 if (pt_set_up) 695 ttm_bo_unref(&mob->pt_bo); 696 697 return -ENOMEM; 698} 699