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 */ 56 struct 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 */ 70 static 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 79 static 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 89 static int vmw_mob_pt_populate(struct vmw_private *dev_priv, 90 struct vmw_mob *mob); 91 static 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 */ 107 static 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; 176 177 out_no_fifo: 178 out_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 */ 191 static 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, 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 } 235 236 237 static 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, 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; 290 291 out_unreserve: 292 ttm_bo_unreserve(batch->otable_bo); 293 out_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); 301 out_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 */ 316 int 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 = kmemdup(dx_tables, sizeof(dx_tables), GFP_KERNEL); 323 if (*otables == NULL) 324 return -ENOMEM; 325 326 dev_priv->otable_batch.num_otables = ARRAY_SIZE(dx_tables); 327 } else { 328 *otables = kmemdup(pre_dx_tables, sizeof(pre_dx_tables), 329 GFP_KERNEL); 330 if (*otables == NULL) 331 return -ENOMEM; 332 333 dev_priv->otable_batch.num_otables = ARRAY_SIZE(pre_dx_tables); 334 } 335 336 ret = vmw_otable_batch_setup(dev_priv, &dev_priv->otable_batch); 337 if (unlikely(ret != 0)) 338 goto out_setup; 339 340 return 0; 341 342 out_setup: 343 kfree(*otables); 344 return ret; 345 } 346 347 static void vmw_otable_batch_takedown(struct vmw_private *dev_priv, 348 struct vmw_otable_batch *batch) 349 { 350 SVGAOTableType i; 351 struct ttm_buffer_object *bo = batch->otable_bo; 352 int ret; 353 354 for (i = 0; i < batch->num_otables; ++i) 355 if (batch->otables[i].enabled) 356 vmw_takedown_otable_base(dev_priv, i, 357 &batch->otables[i]); 358 359 ret = ttm_bo_reserve(bo, false, true, NULL); 360 BUG_ON(ret != 0); 361 362 vmw_fence_single_bo(bo, NULL); 363 ttm_bo_unreserve(bo); 364 365 ttm_bo_unref(&batch->otable_bo); 366 } 367 368 /* 369 * vmw_otables_takedown - Take down guest backed memory object tables 370 * 371 * @dev_priv: Pointer to a device private structure 372 * 373 * Take down the Guest Memory Object tables. 374 */ 375 void vmw_otables_takedown(struct vmw_private *dev_priv) 376 { 377 vmw_otable_batch_takedown(dev_priv, &dev_priv->otable_batch); 378 kfree(dev_priv->otable_batch.otables); 379 } 380 381 /* 382 * vmw_mob_calculate_pt_pages - Calculate the number of page table pages 383 * needed for a guest backed memory object. 384 * 385 * @data_pages: Number of data pages in the memory object buffer. 386 */ 387 static unsigned long vmw_mob_calculate_pt_pages(unsigned long data_pages) 388 { 389 unsigned long data_size = data_pages * PAGE_SIZE; 390 unsigned long tot_size = 0; 391 392 while (likely(data_size > PAGE_SIZE)) { 393 data_size = DIV_ROUND_UP(data_size, PAGE_SIZE); 394 data_size *= VMW_PPN_SIZE; 395 tot_size += (data_size + PAGE_SIZE - 1) & PAGE_MASK; 396 } 397 398 return tot_size >> PAGE_SHIFT; 399 } 400 401 /* 402 * vmw_mob_create - Create a mob, but don't populate it. 403 * 404 * @data_pages: Number of data pages of the underlying buffer object. 405 */ 406 struct vmw_mob *vmw_mob_create(unsigned long data_pages) 407 { 408 struct vmw_mob *mob = kzalloc(sizeof(*mob), GFP_KERNEL); 409 410 if (unlikely(mob == NULL)) 411 return NULL; 412 413 mob->num_pages = vmw_mob_calculate_pt_pages(data_pages); 414 415 return mob; 416 } 417 418 /* 419 * vmw_mob_pt_populate - Populate the mob pagetable 420 * 421 * @mob: Pointer to the mob the pagetable of which we want to 422 * populate. 423 * 424 * This function allocates memory to be used for the pagetable, and 425 * adjusts TTM memory accounting accordingly. Returns ENOMEM if 426 * memory resources aren't sufficient and may cause TTM buffer objects 427 * to be swapped out by using the TTM memory accounting function. 428 */ 429 static int vmw_mob_pt_populate(struct vmw_private *dev_priv, 430 struct vmw_mob *mob) 431 { 432 int ret; 433 BUG_ON(mob->pt_bo != NULL); 434 435 ret = ttm_bo_create(&dev_priv->bdev, mob->num_pages * PAGE_SIZE, 436 ttm_bo_type_device, 437 &vmw_sys_ne_placement, 438 0, false, NULL, &mob->pt_bo); 439 if (unlikely(ret != 0)) 440 return ret; 441 442 ret = ttm_bo_reserve(mob->pt_bo, false, true, NULL); 443 444 BUG_ON(ret != 0); 445 ret = vmw_bo_driver.ttm_tt_populate(mob->pt_bo->ttm); 446 if (unlikely(ret != 0)) 447 goto out_unreserve; 448 ret = vmw_bo_map_dma(mob->pt_bo); 449 if (unlikely(ret != 0)) 450 goto out_unreserve; 451 452 ttm_bo_unreserve(mob->pt_bo); 453 454 return 0; 455 456 out_unreserve: 457 ttm_bo_unreserve(mob->pt_bo); 458 ttm_bo_unref(&mob->pt_bo); 459 460 return ret; 461 } 462 463 /** 464 * vmw_mob_assign_ppn - Assign a value to a page table entry 465 * 466 * @addr: Pointer to pointer to page table entry. 467 * @val: The page table entry 468 * 469 * Assigns a value to a page table entry pointed to by *@addr and increments 470 * *@addr according to the page table entry size. 471 */ 472 #if (VMW_PPN_SIZE == 8) 473 static void vmw_mob_assign_ppn(u32 **addr, dma_addr_t val) 474 { 475 *((u64 *) *addr) = val >> PAGE_SHIFT; 476 *addr += 2; 477 } 478 #else 479 static void vmw_mob_assign_ppn(u32 **addr, dma_addr_t val) 480 { 481 *(*addr)++ = val >> PAGE_SHIFT; 482 } 483 #endif 484 485 /* 486 * vmw_mob_build_pt - Build a pagetable 487 * 488 * @data_addr: Array of DMA addresses to the underlying buffer 489 * object's data pages. 490 * @num_data_pages: Number of buffer object data pages. 491 * @pt_pages: Array of page pointers to the page table pages. 492 * 493 * Returns the number of page table pages actually used. 494 * Uses atomic kmaps of highmem pages to avoid TLB thrashing. 495 */ 496 static unsigned long vmw_mob_build_pt(struct vmw_piter *data_iter, 497 unsigned long num_data_pages, 498 struct vmw_piter *pt_iter) 499 { 500 unsigned long pt_size = num_data_pages * VMW_PPN_SIZE; 501 unsigned long num_pt_pages = DIV_ROUND_UP(pt_size, PAGE_SIZE); 502 unsigned long pt_page; 503 u32 *addr, *save_addr; 504 unsigned long i; 505 struct page *page; 506 507 for (pt_page = 0; pt_page < num_pt_pages; ++pt_page) { 508 page = vmw_piter_page(pt_iter); 509 510 save_addr = addr = kmap_atomic(page); 511 512 for (i = 0; i < PAGE_SIZE / VMW_PPN_SIZE; ++i) { 513 vmw_mob_assign_ppn(&addr, 514 vmw_piter_dma_addr(data_iter)); 515 if (unlikely(--num_data_pages == 0)) 516 break; 517 WARN_ON(!vmw_piter_next(data_iter)); 518 } 519 kunmap_atomic(save_addr); 520 vmw_piter_next(pt_iter); 521 } 522 523 return num_pt_pages; 524 } 525 526 /* 527 * vmw_mob_build_pt - Set up a multilevel mob pagetable 528 * 529 * @mob: Pointer to a mob whose page table needs setting up. 530 * @data_addr Array of DMA addresses to the buffer object's data 531 * pages. 532 * @num_data_pages: Number of buffer object data pages. 533 * 534 * Uses tail recursion to set up a multilevel mob page table. 535 */ 536 static void vmw_mob_pt_setup(struct vmw_mob *mob, 537 struct vmw_piter data_iter, 538 unsigned long num_data_pages) 539 { 540 unsigned long num_pt_pages = 0; 541 struct ttm_buffer_object *bo = mob->pt_bo; 542 struct vmw_piter save_pt_iter; 543 struct vmw_piter pt_iter; 544 const struct vmw_sg_table *vsgt; 545 int ret; 546 547 ret = ttm_bo_reserve(bo, false, true, NULL); 548 BUG_ON(ret != 0); 549 550 vsgt = vmw_bo_sg_table(bo); 551 vmw_piter_start(&pt_iter, vsgt, 0); 552 BUG_ON(!vmw_piter_next(&pt_iter)); 553 mob->pt_level = 0; 554 while (likely(num_data_pages > 1)) { 555 ++mob->pt_level; 556 BUG_ON(mob->pt_level > 2); 557 save_pt_iter = pt_iter; 558 num_pt_pages = vmw_mob_build_pt(&data_iter, num_data_pages, 559 &pt_iter); 560 data_iter = save_pt_iter; 561 num_data_pages = num_pt_pages; 562 } 563 564 mob->pt_root_page = vmw_piter_dma_addr(&save_pt_iter); 565 ttm_bo_unreserve(bo); 566 } 567 568 /* 569 * vmw_mob_destroy - Destroy a mob, unpopulating first if necessary. 570 * 571 * @mob: Pointer to a mob to destroy. 572 */ 573 void vmw_mob_destroy(struct vmw_mob *mob) 574 { 575 if (mob->pt_bo) 576 ttm_bo_unref(&mob->pt_bo); 577 kfree(mob); 578 } 579 580 /* 581 * vmw_mob_unbind - Hide a mob from the device. 582 * 583 * @dev_priv: Pointer to a device private. 584 * @mob_id: Device id of the mob to unbind. 585 */ 586 void vmw_mob_unbind(struct vmw_private *dev_priv, 587 struct vmw_mob *mob) 588 { 589 struct { 590 SVGA3dCmdHeader header; 591 SVGA3dCmdDestroyGBMob body; 592 } *cmd; 593 int ret; 594 struct ttm_buffer_object *bo = mob->pt_bo; 595 596 if (bo) { 597 ret = ttm_bo_reserve(bo, false, true, NULL); 598 /* 599 * Noone else should be using this buffer. 600 */ 601 BUG_ON(ret != 0); 602 } 603 604 cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd)); 605 if (unlikely(cmd == NULL)) { 606 DRM_ERROR("Failed reserving FIFO space for Memory " 607 "Object unbinding.\n"); 608 } else { 609 cmd->header.id = SVGA_3D_CMD_DESTROY_GB_MOB; 610 cmd->header.size = sizeof(cmd->body); 611 cmd->body.mobid = mob->id; 612 vmw_fifo_commit(dev_priv, sizeof(*cmd)); 613 } 614 if (bo) { 615 vmw_fence_single_bo(bo, NULL); 616 ttm_bo_unreserve(bo); 617 } 618 vmw_fifo_resource_dec(dev_priv); 619 } 620 621 /* 622 * vmw_mob_bind - Make a mob visible to the device after first 623 * populating it if necessary. 624 * 625 * @dev_priv: Pointer to a device private. 626 * @mob: Pointer to the mob we're making visible. 627 * @data_addr: Array of DMA addresses to the data pages of the underlying 628 * buffer object. 629 * @num_data_pages: Number of data pages of the underlying buffer 630 * object. 631 * @mob_id: Device id of the mob to bind 632 * 633 * This function is intended to be interfaced with the ttm_tt backend 634 * code. 635 */ 636 int vmw_mob_bind(struct vmw_private *dev_priv, 637 struct vmw_mob *mob, 638 const struct vmw_sg_table *vsgt, 639 unsigned long num_data_pages, 640 int32_t mob_id) 641 { 642 int ret; 643 bool pt_set_up = false; 644 struct vmw_piter data_iter; 645 struct { 646 SVGA3dCmdHeader header; 647 SVGA3dCmdDefineGBMob64 body; 648 } *cmd; 649 650 mob->id = mob_id; 651 vmw_piter_start(&data_iter, vsgt, 0); 652 if (unlikely(!vmw_piter_next(&data_iter))) 653 return 0; 654 655 if (likely(num_data_pages == 1)) { 656 mob->pt_level = VMW_MOBFMT_PTDEPTH_0; 657 mob->pt_root_page = vmw_piter_dma_addr(&data_iter); 658 } else if (vsgt->num_regions == 1) { 659 mob->pt_level = SVGA3D_MOBFMT_RANGE; 660 mob->pt_root_page = vmw_piter_dma_addr(&data_iter); 661 } else if (unlikely(mob->pt_bo == NULL)) { 662 ret = vmw_mob_pt_populate(dev_priv, mob); 663 if (unlikely(ret != 0)) 664 return ret; 665 666 vmw_mob_pt_setup(mob, data_iter, num_data_pages); 667 pt_set_up = true; 668 mob->pt_level += VMW_MOBFMT_PTDEPTH_1 - SVGA3D_MOBFMT_PTDEPTH_1; 669 } 670 671 vmw_fifo_resource_inc(dev_priv); 672 673 cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd)); 674 if (unlikely(cmd == NULL)) { 675 DRM_ERROR("Failed reserving FIFO space for Memory " 676 "Object binding.\n"); 677 goto out_no_cmd_space; 678 } 679 680 cmd->header.id = SVGA_3D_CMD_DEFINE_GB_MOB64; 681 cmd->header.size = sizeof(cmd->body); 682 cmd->body.mobid = mob_id; 683 cmd->body.ptDepth = mob->pt_level; 684 cmd->body.base = mob->pt_root_page >> PAGE_SHIFT; 685 cmd->body.sizeInBytes = num_data_pages * PAGE_SIZE; 686 687 vmw_fifo_commit(dev_priv, sizeof(*cmd)); 688 689 return 0; 690 691 out_no_cmd_space: 692 vmw_fifo_resource_dec(dev_priv); 693 if (pt_set_up) 694 ttm_bo_unref(&mob->pt_bo); 695 696 return -ENOMEM; 697 } 698