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 struct ttm_operation_ctx ctx = { 244 .interruptible = false, 245 .no_wait_gpu = false 246 }; 247 SVGAOTableType i; 248 int ret; 249 250 bo_size = 0; 251 for (i = 0; i < batch->num_otables; ++i) { 252 if (!otables[i].enabled) 253 continue; 254 255 otables[i].size = 256 (otables[i].size + PAGE_SIZE - 1) & PAGE_MASK; 257 bo_size += otables[i].size; 258 } 259 260 ret = ttm_bo_create(&dev_priv->bdev, bo_size, 261 ttm_bo_type_device, 262 &vmw_sys_ne_placement, 263 0, false, &batch->otable_bo); 264 265 if (unlikely(ret != 0)) 266 goto out_no_bo; 267 268 ret = ttm_bo_reserve(batch->otable_bo, false, true, NULL); 269 BUG_ON(ret != 0); 270 ret = vmw_bo_driver.ttm_tt_populate(batch->otable_bo->ttm, &ctx); 271 if (unlikely(ret != 0)) 272 goto out_unreserve; 273 ret = vmw_bo_map_dma(batch->otable_bo); 274 if (unlikely(ret != 0)) 275 goto out_unreserve; 276 277 ttm_bo_unreserve(batch->otable_bo); 278 279 offset = 0; 280 for (i = 0; i < batch->num_otables; ++i) { 281 if (!batch->otables[i].enabled) 282 continue; 283 284 ret = vmw_setup_otable_base(dev_priv, i, batch->otable_bo, 285 offset, 286 &otables[i]); 287 if (unlikely(ret != 0)) 288 goto out_no_setup; 289 offset += otables[i].size; 290 } 291 292 return 0; 293 294 out_unreserve: 295 ttm_bo_unreserve(batch->otable_bo); 296 out_no_setup: 297 for (i = 0; i < batch->num_otables; ++i) { 298 if (batch->otables[i].enabled) 299 vmw_takedown_otable_base(dev_priv, i, 300 &batch->otables[i]); 301 } 302 303 ttm_bo_unref(&batch->otable_bo); 304 out_no_bo: 305 return ret; 306 } 307 308 /* 309 * vmw_otables_setup - Set up guest backed memory object tables 310 * 311 * @dev_priv: Pointer to a device private structure 312 * 313 * Takes care of the device guest backed surface 314 * initialization, by setting up the guest backed memory object tables. 315 * Returns 0 on success and various error codes on failure. A successful return 316 * means the object tables can be taken down using the vmw_otables_takedown 317 * function. 318 */ 319 int vmw_otables_setup(struct vmw_private *dev_priv) 320 { 321 struct vmw_otable **otables = &dev_priv->otable_batch.otables; 322 int ret; 323 324 if (dev_priv->has_dx) { 325 *otables = kmemdup(dx_tables, sizeof(dx_tables), GFP_KERNEL); 326 if (!(*otables)) 327 return -ENOMEM; 328 329 dev_priv->otable_batch.num_otables = ARRAY_SIZE(dx_tables); 330 } else { 331 *otables = kmemdup(pre_dx_tables, sizeof(pre_dx_tables), 332 GFP_KERNEL); 333 if (!(*otables)) 334 return -ENOMEM; 335 336 dev_priv->otable_batch.num_otables = ARRAY_SIZE(pre_dx_tables); 337 } 338 339 ret = vmw_otable_batch_setup(dev_priv, &dev_priv->otable_batch); 340 if (unlikely(ret != 0)) 341 goto out_setup; 342 343 return 0; 344 345 out_setup: 346 kfree(*otables); 347 return ret; 348 } 349 350 static void vmw_otable_batch_takedown(struct vmw_private *dev_priv, 351 struct vmw_otable_batch *batch) 352 { 353 SVGAOTableType i; 354 struct ttm_buffer_object *bo = batch->otable_bo; 355 int ret; 356 357 for (i = 0; i < batch->num_otables; ++i) 358 if (batch->otables[i].enabled) 359 vmw_takedown_otable_base(dev_priv, i, 360 &batch->otables[i]); 361 362 ret = ttm_bo_reserve(bo, false, true, NULL); 363 BUG_ON(ret != 0); 364 365 vmw_fence_single_bo(bo, NULL); 366 ttm_bo_unreserve(bo); 367 368 ttm_bo_unref(&batch->otable_bo); 369 } 370 371 /* 372 * vmw_otables_takedown - Take down guest backed memory object tables 373 * 374 * @dev_priv: Pointer to a device private structure 375 * 376 * Take down the Guest Memory Object tables. 377 */ 378 void vmw_otables_takedown(struct vmw_private *dev_priv) 379 { 380 vmw_otable_batch_takedown(dev_priv, &dev_priv->otable_batch); 381 kfree(dev_priv->otable_batch.otables); 382 } 383 384 /* 385 * vmw_mob_calculate_pt_pages - Calculate the number of page table pages 386 * needed for a guest backed memory object. 387 * 388 * @data_pages: Number of data pages in the memory object buffer. 389 */ 390 static unsigned long vmw_mob_calculate_pt_pages(unsigned long data_pages) 391 { 392 unsigned long data_size = data_pages * PAGE_SIZE; 393 unsigned long tot_size = 0; 394 395 while (likely(data_size > PAGE_SIZE)) { 396 data_size = DIV_ROUND_UP(data_size, PAGE_SIZE); 397 data_size *= VMW_PPN_SIZE; 398 tot_size += (data_size + PAGE_SIZE - 1) & PAGE_MASK; 399 } 400 401 return tot_size >> PAGE_SHIFT; 402 } 403 404 /* 405 * vmw_mob_create - Create a mob, but don't populate it. 406 * 407 * @data_pages: Number of data pages of the underlying buffer object. 408 */ 409 struct vmw_mob *vmw_mob_create(unsigned long data_pages) 410 { 411 struct vmw_mob *mob = kzalloc(sizeof(*mob), GFP_KERNEL); 412 413 if (unlikely(!mob)) 414 return NULL; 415 416 mob->num_pages = vmw_mob_calculate_pt_pages(data_pages); 417 418 return mob; 419 } 420 421 /* 422 * vmw_mob_pt_populate - Populate the mob pagetable 423 * 424 * @mob: Pointer to the mob the pagetable of which we want to 425 * populate. 426 * 427 * This function allocates memory to be used for the pagetable, and 428 * adjusts TTM memory accounting accordingly. Returns ENOMEM if 429 * memory resources aren't sufficient and may cause TTM buffer objects 430 * to be swapped out by using the TTM memory accounting function. 431 */ 432 static int vmw_mob_pt_populate(struct vmw_private *dev_priv, 433 struct vmw_mob *mob) 434 { 435 int ret; 436 struct ttm_operation_ctx ctx = { 437 .interruptible = false, 438 .no_wait_gpu = false 439 }; 440 441 BUG_ON(mob->pt_bo != NULL); 442 443 ret = ttm_bo_create(&dev_priv->bdev, mob->num_pages * PAGE_SIZE, 444 ttm_bo_type_device, 445 &vmw_sys_ne_placement, 446 0, false, &mob->pt_bo); 447 if (unlikely(ret != 0)) 448 return ret; 449 450 ret = ttm_bo_reserve(mob->pt_bo, false, true, NULL); 451 452 BUG_ON(ret != 0); 453 ret = vmw_bo_driver.ttm_tt_populate(mob->pt_bo->ttm, &ctx); 454 if (unlikely(ret != 0)) 455 goto out_unreserve; 456 ret = vmw_bo_map_dma(mob->pt_bo); 457 if (unlikely(ret != 0)) 458 goto out_unreserve; 459 460 ttm_bo_unreserve(mob->pt_bo); 461 462 return 0; 463 464 out_unreserve: 465 ttm_bo_unreserve(mob->pt_bo); 466 ttm_bo_unref(&mob->pt_bo); 467 468 return ret; 469 } 470 471 /** 472 * vmw_mob_assign_ppn - Assign a value to a page table entry 473 * 474 * @addr: Pointer to pointer to page table entry. 475 * @val: The page table entry 476 * 477 * Assigns a value to a page table entry pointed to by *@addr and increments 478 * *@addr according to the page table entry size. 479 */ 480 #if (VMW_PPN_SIZE == 8) 481 static void vmw_mob_assign_ppn(u32 **addr, dma_addr_t val) 482 { 483 *((u64 *) *addr) = val >> PAGE_SHIFT; 484 *addr += 2; 485 } 486 #else 487 static void vmw_mob_assign_ppn(u32 **addr, dma_addr_t val) 488 { 489 *(*addr)++ = val >> PAGE_SHIFT; 490 } 491 #endif 492 493 /* 494 * vmw_mob_build_pt - Build a pagetable 495 * 496 * @data_addr: Array of DMA addresses to the underlying buffer 497 * object's data pages. 498 * @num_data_pages: Number of buffer object data pages. 499 * @pt_pages: Array of page pointers to the page table pages. 500 * 501 * Returns the number of page table pages actually used. 502 * Uses atomic kmaps of highmem pages to avoid TLB thrashing. 503 */ 504 static unsigned long vmw_mob_build_pt(struct vmw_piter *data_iter, 505 unsigned long num_data_pages, 506 struct vmw_piter *pt_iter) 507 { 508 unsigned long pt_size = num_data_pages * VMW_PPN_SIZE; 509 unsigned long num_pt_pages = DIV_ROUND_UP(pt_size, PAGE_SIZE); 510 unsigned long pt_page; 511 u32 *addr, *save_addr; 512 unsigned long i; 513 struct page *page; 514 515 for (pt_page = 0; pt_page < num_pt_pages; ++pt_page) { 516 page = vmw_piter_page(pt_iter); 517 518 save_addr = addr = kmap_atomic(page); 519 520 for (i = 0; i < PAGE_SIZE / VMW_PPN_SIZE; ++i) { 521 vmw_mob_assign_ppn(&addr, 522 vmw_piter_dma_addr(data_iter)); 523 if (unlikely(--num_data_pages == 0)) 524 break; 525 WARN_ON(!vmw_piter_next(data_iter)); 526 } 527 kunmap_atomic(save_addr); 528 vmw_piter_next(pt_iter); 529 } 530 531 return num_pt_pages; 532 } 533 534 /* 535 * vmw_mob_build_pt - Set up a multilevel mob pagetable 536 * 537 * @mob: Pointer to a mob whose page table needs setting up. 538 * @data_addr Array of DMA addresses to the buffer object's data 539 * pages. 540 * @num_data_pages: Number of buffer object data pages. 541 * 542 * Uses tail recursion to set up a multilevel mob page table. 543 */ 544 static void vmw_mob_pt_setup(struct vmw_mob *mob, 545 struct vmw_piter data_iter, 546 unsigned long num_data_pages) 547 { 548 unsigned long num_pt_pages = 0; 549 struct ttm_buffer_object *bo = mob->pt_bo; 550 struct vmw_piter save_pt_iter; 551 struct vmw_piter pt_iter; 552 const struct vmw_sg_table *vsgt; 553 int ret; 554 555 ret = ttm_bo_reserve(bo, false, true, NULL); 556 BUG_ON(ret != 0); 557 558 vsgt = vmw_bo_sg_table(bo); 559 vmw_piter_start(&pt_iter, vsgt, 0); 560 BUG_ON(!vmw_piter_next(&pt_iter)); 561 mob->pt_level = 0; 562 while (likely(num_data_pages > 1)) { 563 ++mob->pt_level; 564 BUG_ON(mob->pt_level > 2); 565 save_pt_iter = pt_iter; 566 num_pt_pages = vmw_mob_build_pt(&data_iter, num_data_pages, 567 &pt_iter); 568 data_iter = save_pt_iter; 569 num_data_pages = num_pt_pages; 570 } 571 572 mob->pt_root_page = vmw_piter_dma_addr(&save_pt_iter); 573 ttm_bo_unreserve(bo); 574 } 575 576 /* 577 * vmw_mob_destroy - Destroy a mob, unpopulating first if necessary. 578 * 579 * @mob: Pointer to a mob to destroy. 580 */ 581 void vmw_mob_destroy(struct vmw_mob *mob) 582 { 583 if (mob->pt_bo) 584 ttm_bo_unref(&mob->pt_bo); 585 kfree(mob); 586 } 587 588 /* 589 * vmw_mob_unbind - Hide a mob from the device. 590 * 591 * @dev_priv: Pointer to a device private. 592 * @mob_id: Device id of the mob to unbind. 593 */ 594 void vmw_mob_unbind(struct vmw_private *dev_priv, 595 struct vmw_mob *mob) 596 { 597 struct { 598 SVGA3dCmdHeader header; 599 SVGA3dCmdDestroyGBMob body; 600 } *cmd; 601 int ret; 602 struct ttm_buffer_object *bo = mob->pt_bo; 603 604 if (bo) { 605 ret = ttm_bo_reserve(bo, false, true, NULL); 606 /* 607 * Noone else should be using this buffer. 608 */ 609 BUG_ON(ret != 0); 610 } 611 612 cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd)); 613 if (unlikely(cmd == NULL)) { 614 DRM_ERROR("Failed reserving FIFO space for Memory " 615 "Object unbinding.\n"); 616 } else { 617 cmd->header.id = SVGA_3D_CMD_DESTROY_GB_MOB; 618 cmd->header.size = sizeof(cmd->body); 619 cmd->body.mobid = mob->id; 620 vmw_fifo_commit(dev_priv, sizeof(*cmd)); 621 } 622 if (bo) { 623 vmw_fence_single_bo(bo, NULL); 624 ttm_bo_unreserve(bo); 625 } 626 vmw_fifo_resource_dec(dev_priv); 627 } 628 629 /* 630 * vmw_mob_bind - Make a mob visible to the device after first 631 * populating it if necessary. 632 * 633 * @dev_priv: Pointer to a device private. 634 * @mob: Pointer to the mob we're making visible. 635 * @data_addr: Array of DMA addresses to the data pages of the underlying 636 * buffer object. 637 * @num_data_pages: Number of data pages of the underlying buffer 638 * object. 639 * @mob_id: Device id of the mob to bind 640 * 641 * This function is intended to be interfaced with the ttm_tt backend 642 * code. 643 */ 644 int vmw_mob_bind(struct vmw_private *dev_priv, 645 struct vmw_mob *mob, 646 const struct vmw_sg_table *vsgt, 647 unsigned long num_data_pages, 648 int32_t mob_id) 649 { 650 int ret; 651 bool pt_set_up = false; 652 struct vmw_piter data_iter; 653 struct { 654 SVGA3dCmdHeader header; 655 SVGA3dCmdDefineGBMob64 body; 656 } *cmd; 657 658 mob->id = mob_id; 659 vmw_piter_start(&data_iter, vsgt, 0); 660 if (unlikely(!vmw_piter_next(&data_iter))) 661 return 0; 662 663 if (likely(num_data_pages == 1)) { 664 mob->pt_level = VMW_MOBFMT_PTDEPTH_0; 665 mob->pt_root_page = vmw_piter_dma_addr(&data_iter); 666 } else if (vsgt->num_regions == 1) { 667 mob->pt_level = SVGA3D_MOBFMT_RANGE; 668 mob->pt_root_page = vmw_piter_dma_addr(&data_iter); 669 } else if (unlikely(mob->pt_bo == NULL)) { 670 ret = vmw_mob_pt_populate(dev_priv, mob); 671 if (unlikely(ret != 0)) 672 return ret; 673 674 vmw_mob_pt_setup(mob, data_iter, num_data_pages); 675 pt_set_up = true; 676 mob->pt_level += VMW_MOBFMT_PTDEPTH_1 - SVGA3D_MOBFMT_PTDEPTH_1; 677 } 678 679 vmw_fifo_resource_inc(dev_priv); 680 681 cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd)); 682 if (unlikely(cmd == NULL)) { 683 DRM_ERROR("Failed reserving FIFO space for Memory " 684 "Object binding.\n"); 685 goto out_no_cmd_space; 686 } 687 688 cmd->header.id = SVGA_3D_CMD_DEFINE_GB_MOB64; 689 cmd->header.size = sizeof(cmd->body); 690 cmd->body.mobid = mob_id; 691 cmd->body.ptDepth = mob->pt_level; 692 cmd->body.base = mob->pt_root_page >> PAGE_SHIFT; 693 cmd->body.sizeInBytes = num_data_pages * PAGE_SIZE; 694 695 vmw_fifo_commit(dev_priv, sizeof(*cmd)); 696 697 return 0; 698 699 out_no_cmd_space: 700 vmw_fifo_resource_dec(dev_priv); 701 if (pt_set_up) 702 ttm_bo_unref(&mob->pt_bo); 703 704 return -ENOMEM; 705 } 706