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, NULL, 264 &batch->otable_bo); 265 266 if (unlikely(ret != 0)) 267 goto out_no_bo; 268 269 ret = ttm_bo_reserve(batch->otable_bo, false, true, NULL); 270 BUG_ON(ret != 0); 271 ret = vmw_bo_driver.ttm_tt_populate(batch->otable_bo->ttm, &ctx); 272 if (unlikely(ret != 0)) 273 goto out_unreserve; 274 ret = vmw_bo_map_dma(batch->otable_bo); 275 if (unlikely(ret != 0)) 276 goto out_unreserve; 277 278 ttm_bo_unreserve(batch->otable_bo); 279 280 offset = 0; 281 for (i = 0; i < batch->num_otables; ++i) { 282 if (!batch->otables[i].enabled) 283 continue; 284 285 ret = vmw_setup_otable_base(dev_priv, i, batch->otable_bo, 286 offset, 287 &otables[i]); 288 if (unlikely(ret != 0)) 289 goto out_no_setup; 290 offset += otables[i].size; 291 } 292 293 return 0; 294 295 out_unreserve: 296 ttm_bo_unreserve(batch->otable_bo); 297 out_no_setup: 298 for (i = 0; i < batch->num_otables; ++i) { 299 if (batch->otables[i].enabled) 300 vmw_takedown_otable_base(dev_priv, i, 301 &batch->otables[i]); 302 } 303 304 ttm_bo_unref(&batch->otable_bo); 305 out_no_bo: 306 return ret; 307 } 308 309 /* 310 * vmw_otables_setup - Set up guest backed memory object tables 311 * 312 * @dev_priv: Pointer to a device private structure 313 * 314 * Takes care of the device guest backed surface 315 * initialization, by setting up the guest backed memory object tables. 316 * Returns 0 on success and various error codes on failure. A successful return 317 * means the object tables can be taken down using the vmw_otables_takedown 318 * function. 319 */ 320 int vmw_otables_setup(struct vmw_private *dev_priv) 321 { 322 struct vmw_otable **otables = &dev_priv->otable_batch.otables; 323 int ret; 324 325 if (dev_priv->has_dx) { 326 *otables = kmemdup(dx_tables, sizeof(dx_tables), GFP_KERNEL); 327 if (!(*otables)) 328 return -ENOMEM; 329 330 dev_priv->otable_batch.num_otables = ARRAY_SIZE(dx_tables); 331 } else { 332 *otables = kmemdup(pre_dx_tables, sizeof(pre_dx_tables), 333 GFP_KERNEL); 334 if (!(*otables)) 335 return -ENOMEM; 336 337 dev_priv->otable_batch.num_otables = ARRAY_SIZE(pre_dx_tables); 338 } 339 340 ret = vmw_otable_batch_setup(dev_priv, &dev_priv->otable_batch); 341 if (unlikely(ret != 0)) 342 goto out_setup; 343 344 return 0; 345 346 out_setup: 347 kfree(*otables); 348 return ret; 349 } 350 351 static void vmw_otable_batch_takedown(struct vmw_private *dev_priv, 352 struct vmw_otable_batch *batch) 353 { 354 SVGAOTableType i; 355 struct ttm_buffer_object *bo = batch->otable_bo; 356 int ret; 357 358 for (i = 0; i < batch->num_otables; ++i) 359 if (batch->otables[i].enabled) 360 vmw_takedown_otable_base(dev_priv, i, 361 &batch->otables[i]); 362 363 ret = ttm_bo_reserve(bo, false, true, NULL); 364 BUG_ON(ret != 0); 365 366 vmw_fence_single_bo(bo, NULL); 367 ttm_bo_unreserve(bo); 368 369 ttm_bo_unref(&batch->otable_bo); 370 } 371 372 /* 373 * vmw_otables_takedown - Take down guest backed memory object tables 374 * 375 * @dev_priv: Pointer to a device private structure 376 * 377 * Take down the Guest Memory Object tables. 378 */ 379 void vmw_otables_takedown(struct vmw_private *dev_priv) 380 { 381 vmw_otable_batch_takedown(dev_priv, &dev_priv->otable_batch); 382 kfree(dev_priv->otable_batch.otables); 383 } 384 385 /* 386 * vmw_mob_calculate_pt_pages - Calculate the number of page table pages 387 * needed for a guest backed memory object. 388 * 389 * @data_pages: Number of data pages in the memory object buffer. 390 */ 391 static unsigned long vmw_mob_calculate_pt_pages(unsigned long data_pages) 392 { 393 unsigned long data_size = data_pages * PAGE_SIZE; 394 unsigned long tot_size = 0; 395 396 while (likely(data_size > PAGE_SIZE)) { 397 data_size = DIV_ROUND_UP(data_size, PAGE_SIZE); 398 data_size *= VMW_PPN_SIZE; 399 tot_size += (data_size + PAGE_SIZE - 1) & PAGE_MASK; 400 } 401 402 return tot_size >> PAGE_SHIFT; 403 } 404 405 /* 406 * vmw_mob_create - Create a mob, but don't populate it. 407 * 408 * @data_pages: Number of data pages of the underlying buffer object. 409 */ 410 struct vmw_mob *vmw_mob_create(unsigned long data_pages) 411 { 412 struct vmw_mob *mob = kzalloc(sizeof(*mob), GFP_KERNEL); 413 414 if (unlikely(!mob)) 415 return NULL; 416 417 mob->num_pages = vmw_mob_calculate_pt_pages(data_pages); 418 419 return mob; 420 } 421 422 /* 423 * vmw_mob_pt_populate - Populate the mob pagetable 424 * 425 * @mob: Pointer to the mob the pagetable of which we want to 426 * populate. 427 * 428 * This function allocates memory to be used for the pagetable, and 429 * adjusts TTM memory accounting accordingly. Returns ENOMEM if 430 * memory resources aren't sufficient and may cause TTM buffer objects 431 * to be swapped out by using the TTM memory accounting function. 432 */ 433 static int vmw_mob_pt_populate(struct vmw_private *dev_priv, 434 struct vmw_mob *mob) 435 { 436 int ret; 437 struct ttm_operation_ctx ctx = { 438 .interruptible = false, 439 .no_wait_gpu = false 440 }; 441 442 BUG_ON(mob->pt_bo != NULL); 443 444 ret = ttm_bo_create(&dev_priv->bdev, mob->num_pages * PAGE_SIZE, 445 ttm_bo_type_device, 446 &vmw_sys_ne_placement, 447 0, false, NULL, &mob->pt_bo); 448 if (unlikely(ret != 0)) 449 return ret; 450 451 ret = ttm_bo_reserve(mob->pt_bo, false, true, NULL); 452 453 BUG_ON(ret != 0); 454 ret = vmw_bo_driver.ttm_tt_populate(mob->pt_bo->ttm, &ctx); 455 if (unlikely(ret != 0)) 456 goto out_unreserve; 457 ret = vmw_bo_map_dma(mob->pt_bo); 458 if (unlikely(ret != 0)) 459 goto out_unreserve; 460 461 ttm_bo_unreserve(mob->pt_bo); 462 463 return 0; 464 465 out_unreserve: 466 ttm_bo_unreserve(mob->pt_bo); 467 ttm_bo_unref(&mob->pt_bo); 468 469 return ret; 470 } 471 472 /** 473 * vmw_mob_assign_ppn - Assign a value to a page table entry 474 * 475 * @addr: Pointer to pointer to page table entry. 476 * @val: The page table entry 477 * 478 * Assigns a value to a page table entry pointed to by *@addr and increments 479 * *@addr according to the page table entry size. 480 */ 481 #if (VMW_PPN_SIZE == 8) 482 static void vmw_mob_assign_ppn(u32 **addr, dma_addr_t val) 483 { 484 *((u64 *) *addr) = val >> PAGE_SHIFT; 485 *addr += 2; 486 } 487 #else 488 static void vmw_mob_assign_ppn(u32 **addr, dma_addr_t val) 489 { 490 *(*addr)++ = val >> PAGE_SHIFT; 491 } 492 #endif 493 494 /* 495 * vmw_mob_build_pt - Build a pagetable 496 * 497 * @data_addr: Array of DMA addresses to the underlying buffer 498 * object's data pages. 499 * @num_data_pages: Number of buffer object data pages. 500 * @pt_pages: Array of page pointers to the page table pages. 501 * 502 * Returns the number of page table pages actually used. 503 * Uses atomic kmaps of highmem pages to avoid TLB thrashing. 504 */ 505 static unsigned long vmw_mob_build_pt(struct vmw_piter *data_iter, 506 unsigned long num_data_pages, 507 struct vmw_piter *pt_iter) 508 { 509 unsigned long pt_size = num_data_pages * VMW_PPN_SIZE; 510 unsigned long num_pt_pages = DIV_ROUND_UP(pt_size, PAGE_SIZE); 511 unsigned long pt_page; 512 u32 *addr, *save_addr; 513 unsigned long i; 514 struct page *page; 515 516 for (pt_page = 0; pt_page < num_pt_pages; ++pt_page) { 517 page = vmw_piter_page(pt_iter); 518 519 save_addr = addr = kmap_atomic(page); 520 521 for (i = 0; i < PAGE_SIZE / VMW_PPN_SIZE; ++i) { 522 vmw_mob_assign_ppn(&addr, 523 vmw_piter_dma_addr(data_iter)); 524 if (unlikely(--num_data_pages == 0)) 525 break; 526 WARN_ON(!vmw_piter_next(data_iter)); 527 } 528 kunmap_atomic(save_addr); 529 vmw_piter_next(pt_iter); 530 } 531 532 return num_pt_pages; 533 } 534 535 /* 536 * vmw_mob_build_pt - Set up a multilevel mob pagetable 537 * 538 * @mob: Pointer to a mob whose page table needs setting up. 539 * @data_addr Array of DMA addresses to the buffer object's data 540 * pages. 541 * @num_data_pages: Number of buffer object data pages. 542 * 543 * Uses tail recursion to set up a multilevel mob page table. 544 */ 545 static void vmw_mob_pt_setup(struct vmw_mob *mob, 546 struct vmw_piter data_iter, 547 unsigned long num_data_pages) 548 { 549 unsigned long num_pt_pages = 0; 550 struct ttm_buffer_object *bo = mob->pt_bo; 551 struct vmw_piter save_pt_iter; 552 struct vmw_piter pt_iter; 553 const struct vmw_sg_table *vsgt; 554 int ret; 555 556 ret = ttm_bo_reserve(bo, false, true, NULL); 557 BUG_ON(ret != 0); 558 559 vsgt = vmw_bo_sg_table(bo); 560 vmw_piter_start(&pt_iter, vsgt, 0); 561 BUG_ON(!vmw_piter_next(&pt_iter)); 562 mob->pt_level = 0; 563 while (likely(num_data_pages > 1)) { 564 ++mob->pt_level; 565 BUG_ON(mob->pt_level > 2); 566 save_pt_iter = pt_iter; 567 num_pt_pages = vmw_mob_build_pt(&data_iter, num_data_pages, 568 &pt_iter); 569 data_iter = save_pt_iter; 570 num_data_pages = num_pt_pages; 571 } 572 573 mob->pt_root_page = vmw_piter_dma_addr(&save_pt_iter); 574 ttm_bo_unreserve(bo); 575 } 576 577 /* 578 * vmw_mob_destroy - Destroy a mob, unpopulating first if necessary. 579 * 580 * @mob: Pointer to a mob to destroy. 581 */ 582 void vmw_mob_destroy(struct vmw_mob *mob) 583 { 584 if (mob->pt_bo) 585 ttm_bo_unref(&mob->pt_bo); 586 kfree(mob); 587 } 588 589 /* 590 * vmw_mob_unbind - Hide a mob from the device. 591 * 592 * @dev_priv: Pointer to a device private. 593 * @mob_id: Device id of the mob to unbind. 594 */ 595 void vmw_mob_unbind(struct vmw_private *dev_priv, 596 struct vmw_mob *mob) 597 { 598 struct { 599 SVGA3dCmdHeader header; 600 SVGA3dCmdDestroyGBMob body; 601 } *cmd; 602 int ret; 603 struct ttm_buffer_object *bo = mob->pt_bo; 604 605 if (bo) { 606 ret = ttm_bo_reserve(bo, false, true, NULL); 607 /* 608 * Noone else should be using this buffer. 609 */ 610 BUG_ON(ret != 0); 611 } 612 613 cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd)); 614 if (unlikely(cmd == NULL)) { 615 DRM_ERROR("Failed reserving FIFO space for Memory " 616 "Object unbinding.\n"); 617 } else { 618 cmd->header.id = SVGA_3D_CMD_DESTROY_GB_MOB; 619 cmd->header.size = sizeof(cmd->body); 620 cmd->body.mobid = mob->id; 621 vmw_fifo_commit(dev_priv, sizeof(*cmd)); 622 } 623 if (bo) { 624 vmw_fence_single_bo(bo, NULL); 625 ttm_bo_unreserve(bo); 626 } 627 vmw_fifo_resource_dec(dev_priv); 628 } 629 630 /* 631 * vmw_mob_bind - Make a mob visible to the device after first 632 * populating it if necessary. 633 * 634 * @dev_priv: Pointer to a device private. 635 * @mob: Pointer to the mob we're making visible. 636 * @data_addr: Array of DMA addresses to the data pages of the underlying 637 * buffer object. 638 * @num_data_pages: Number of data pages of the underlying buffer 639 * object. 640 * @mob_id: Device id of the mob to bind 641 * 642 * This function is intended to be interfaced with the ttm_tt backend 643 * code. 644 */ 645 int vmw_mob_bind(struct vmw_private *dev_priv, 646 struct vmw_mob *mob, 647 const struct vmw_sg_table *vsgt, 648 unsigned long num_data_pages, 649 int32_t mob_id) 650 { 651 int ret; 652 bool pt_set_up = false; 653 struct vmw_piter data_iter; 654 struct { 655 SVGA3dCmdHeader header; 656 SVGA3dCmdDefineGBMob64 body; 657 } *cmd; 658 659 mob->id = mob_id; 660 vmw_piter_start(&data_iter, vsgt, 0); 661 if (unlikely(!vmw_piter_next(&data_iter))) 662 return 0; 663 664 if (likely(num_data_pages == 1)) { 665 mob->pt_level = VMW_MOBFMT_PTDEPTH_0; 666 mob->pt_root_page = vmw_piter_dma_addr(&data_iter); 667 } else if (vsgt->num_regions == 1) { 668 mob->pt_level = SVGA3D_MOBFMT_RANGE; 669 mob->pt_root_page = vmw_piter_dma_addr(&data_iter); 670 } else if (unlikely(mob->pt_bo == NULL)) { 671 ret = vmw_mob_pt_populate(dev_priv, mob); 672 if (unlikely(ret != 0)) 673 return ret; 674 675 vmw_mob_pt_setup(mob, data_iter, num_data_pages); 676 pt_set_up = true; 677 mob->pt_level += VMW_MOBFMT_PTDEPTH_1 - SVGA3D_MOBFMT_PTDEPTH_1; 678 } 679 680 vmw_fifo_resource_inc(dev_priv); 681 682 cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd)); 683 if (unlikely(cmd == NULL)) { 684 DRM_ERROR("Failed reserving FIFO space for Memory " 685 "Object binding.\n"); 686 goto out_no_cmd_space; 687 } 688 689 cmd->header.id = SVGA_3D_CMD_DEFINE_GB_MOB64; 690 cmd->header.size = sizeof(cmd->body); 691 cmd->body.mobid = mob_id; 692 cmd->body.ptDepth = mob->pt_level; 693 cmd->body.base = mob->pt_root_page >> PAGE_SHIFT; 694 cmd->body.sizeInBytes = num_data_pages * PAGE_SIZE; 695 696 vmw_fifo_commit(dev_priv, sizeof(*cmd)); 697 698 return 0; 699 700 out_no_cmd_space: 701 vmw_fifo_resource_dec(dev_priv); 702 if (pt_set_up) 703 ttm_bo_unref(&mob->pt_bo); 704 705 return -ENOMEM; 706 } 707