1 // SPDX-License-Identifier: GPL-2.0 OR MIT 2 /************************************************************************** 3 * 4 * Copyright 2012-2015 VMware, Inc., Palo Alto, CA., USA 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 ret = -ENOMEM; 152 goto out_no_fifo; 153 } 154 155 memset(cmd, 0, sizeof(*cmd)); 156 cmd->header.id = SVGA_3D_CMD_SET_OTABLE_BASE64; 157 cmd->header.size = sizeof(cmd->body); 158 cmd->body.type = type; 159 cmd->body.baseAddress = mob->pt_root_page >> PAGE_SHIFT; 160 cmd->body.sizeInBytes = otable->size; 161 cmd->body.validSizeInBytes = 0; 162 cmd->body.ptDepth = mob->pt_level; 163 164 /* 165 * The device doesn't support this, But the otable size is 166 * determined at compile-time, so this BUG shouldn't trigger 167 * randomly. 168 */ 169 BUG_ON(mob->pt_level == VMW_MOBFMT_PTDEPTH_2); 170 171 vmw_fifo_commit(dev_priv, sizeof(*cmd)); 172 otable->page_table = mob; 173 174 return 0; 175 176 out_no_fifo: 177 out_no_populate: 178 vmw_mob_destroy(mob); 179 return ret; 180 } 181 182 /* 183 * vmw_takedown_otable_base - Issue an object table base takedown command 184 * to the device 185 * 186 * @dev_priv: Pointer to a device private structure 187 * @type: Type of object table base 188 * 189 */ 190 static void vmw_takedown_otable_base(struct vmw_private *dev_priv, 191 SVGAOTableType type, 192 struct vmw_otable *otable) 193 { 194 struct { 195 SVGA3dCmdHeader header; 196 SVGA3dCmdSetOTableBase body; 197 } *cmd; 198 struct ttm_buffer_object *bo; 199 200 if (otable->page_table == NULL) 201 return; 202 203 bo = otable->page_table->pt_bo; 204 cmd = VMW_FIFO_RESERVE(dev_priv, sizeof(*cmd)); 205 if (unlikely(cmd == NULL)) 206 return; 207 208 memset(cmd, 0, sizeof(*cmd)); 209 cmd->header.id = SVGA_3D_CMD_SET_OTABLE_BASE; 210 cmd->header.size = sizeof(cmd->body); 211 cmd->body.type = type; 212 cmd->body.baseAddress = 0; 213 cmd->body.sizeInBytes = 0; 214 cmd->body.validSizeInBytes = 0; 215 cmd->body.ptDepth = SVGA3D_MOBFMT_INVALID; 216 vmw_fifo_commit(dev_priv, sizeof(*cmd)); 217 218 if (bo) { 219 int ret; 220 221 ret = ttm_bo_reserve(bo, false, true, NULL); 222 BUG_ON(ret != 0); 223 224 vmw_bo_fence_single(bo, NULL); 225 ttm_bo_unreserve(bo); 226 } 227 228 vmw_mob_destroy(otable->page_table); 229 otable->page_table = NULL; 230 } 231 232 233 static int vmw_otable_batch_setup(struct vmw_private *dev_priv, 234 struct vmw_otable_batch *batch) 235 { 236 unsigned long offset; 237 unsigned long bo_size; 238 struct vmw_otable *otables = batch->otables; 239 struct ttm_operation_ctx ctx = { 240 .interruptible = false, 241 .no_wait_gpu = false 242 }; 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, &batch->otable_bo); 260 261 if (unlikely(ret != 0)) 262 goto out_no_bo; 263 264 ret = ttm_bo_reserve(batch->otable_bo, false, true, NULL); 265 BUG_ON(ret != 0); 266 ret = vmw_bo_driver.ttm_tt_populate(batch->otable_bo->ttm, &ctx); 267 if (unlikely(ret != 0)) 268 goto out_unreserve; 269 ret = vmw_bo_map_dma(batch->otable_bo); 270 if (unlikely(ret != 0)) 271 goto out_unreserve; 272 273 ttm_bo_unreserve(batch->otable_bo); 274 275 offset = 0; 276 for (i = 0; i < batch->num_otables; ++i) { 277 if (!batch->otables[i].enabled) 278 continue; 279 280 ret = vmw_setup_otable_base(dev_priv, i, batch->otable_bo, 281 offset, 282 &otables[i]); 283 if (unlikely(ret != 0)) 284 goto out_no_setup; 285 offset += otables[i].size; 286 } 287 288 return 0; 289 290 out_unreserve: 291 ttm_bo_unreserve(batch->otable_bo); 292 out_no_setup: 293 for (i = 0; i < batch->num_otables; ++i) { 294 if (batch->otables[i].enabled) 295 vmw_takedown_otable_base(dev_priv, i, 296 &batch->otables[i]); 297 } 298 299 ttm_bo_put(batch->otable_bo); 300 batch->otable_bo = NULL; 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)) 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)) 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_bo_fence_single(bo, NULL); 363 ttm_bo_unreserve(bo); 364 365 ttm_bo_put(batch->otable_bo); 366 batch->otable_bo = NULL; 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 */ 376 void 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 */ 388 static 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 */ 407 struct 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)) 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 */ 430 static int vmw_mob_pt_populate(struct vmw_private *dev_priv, 431 struct vmw_mob *mob) 432 { 433 int ret; 434 struct ttm_operation_ctx ctx = { 435 .interruptible = false, 436 .no_wait_gpu = false 437 }; 438 439 BUG_ON(mob->pt_bo != NULL); 440 441 ret = ttm_bo_create(&dev_priv->bdev, mob->num_pages * PAGE_SIZE, 442 ttm_bo_type_device, 443 &vmw_sys_ne_placement, 444 0, false, &mob->pt_bo); 445 if (unlikely(ret != 0)) 446 return ret; 447 448 ret = ttm_bo_reserve(mob->pt_bo, false, true, NULL); 449 450 BUG_ON(ret != 0); 451 ret = vmw_bo_driver.ttm_tt_populate(mob->pt_bo->ttm, &ctx); 452 if (unlikely(ret != 0)) 453 goto out_unreserve; 454 ret = vmw_bo_map_dma(mob->pt_bo); 455 if (unlikely(ret != 0)) 456 goto out_unreserve; 457 458 ttm_bo_unreserve(mob->pt_bo); 459 460 return 0; 461 462 out_unreserve: 463 ttm_bo_unreserve(mob->pt_bo); 464 ttm_bo_put(mob->pt_bo); 465 mob->pt_bo = NULL; 466 467 return ret; 468 } 469 470 /** 471 * vmw_mob_assign_ppn - Assign a value to a page table entry 472 * 473 * @addr: Pointer to pointer to page table entry. 474 * @val: The page table entry 475 * 476 * Assigns a value to a page table entry pointed to by *@addr and increments 477 * *@addr according to the page table entry size. 478 */ 479 #if (VMW_PPN_SIZE == 8) 480 static void vmw_mob_assign_ppn(u32 **addr, dma_addr_t val) 481 { 482 *((u64 *) *addr) = val >> PAGE_SHIFT; 483 *addr += 2; 484 } 485 #else 486 static void vmw_mob_assign_ppn(u32 **addr, dma_addr_t val) 487 { 488 *(*addr)++ = val >> PAGE_SHIFT; 489 } 490 #endif 491 492 /* 493 * vmw_mob_build_pt - Build a pagetable 494 * 495 * @data_addr: Array of DMA addresses to the underlying buffer 496 * object's data pages. 497 * @num_data_pages: Number of buffer object data pages. 498 * @pt_pages: Array of page pointers to the page table pages. 499 * 500 * Returns the number of page table pages actually used. 501 * Uses atomic kmaps of highmem pages to avoid TLB thrashing. 502 */ 503 static unsigned long vmw_mob_build_pt(struct vmw_piter *data_iter, 504 unsigned long num_data_pages, 505 struct vmw_piter *pt_iter) 506 { 507 unsigned long pt_size = num_data_pages * VMW_PPN_SIZE; 508 unsigned long num_pt_pages = DIV_ROUND_UP(pt_size, PAGE_SIZE); 509 unsigned long pt_page; 510 u32 *addr, *save_addr; 511 unsigned long i; 512 struct page *page; 513 514 for (pt_page = 0; pt_page < num_pt_pages; ++pt_page) { 515 page = vmw_piter_page(pt_iter); 516 517 save_addr = addr = kmap_atomic(page); 518 519 for (i = 0; i < PAGE_SIZE / VMW_PPN_SIZE; ++i) { 520 vmw_mob_assign_ppn(&addr, 521 vmw_piter_dma_addr(data_iter)); 522 if (unlikely(--num_data_pages == 0)) 523 break; 524 WARN_ON(!vmw_piter_next(data_iter)); 525 } 526 kunmap_atomic(save_addr); 527 vmw_piter_next(pt_iter); 528 } 529 530 return num_pt_pages; 531 } 532 533 /* 534 * vmw_mob_build_pt - Set up a multilevel mob pagetable 535 * 536 * @mob: Pointer to a mob whose page table needs setting up. 537 * @data_addr Array of DMA addresses to the buffer object's data 538 * pages. 539 * @num_data_pages: Number of buffer object data pages. 540 * 541 * Uses tail recursion to set up a multilevel mob page table. 542 */ 543 static void vmw_mob_pt_setup(struct vmw_mob *mob, 544 struct vmw_piter data_iter, 545 unsigned long num_data_pages) 546 { 547 unsigned long num_pt_pages = 0; 548 struct ttm_buffer_object *bo = mob->pt_bo; 549 struct vmw_piter save_pt_iter; 550 struct vmw_piter pt_iter; 551 const struct vmw_sg_table *vsgt; 552 int ret; 553 554 ret = ttm_bo_reserve(bo, false, true, NULL); 555 BUG_ON(ret != 0); 556 557 vsgt = vmw_bo_sg_table(bo); 558 vmw_piter_start(&pt_iter, vsgt, 0); 559 BUG_ON(!vmw_piter_next(&pt_iter)); 560 mob->pt_level = 0; 561 while (likely(num_data_pages > 1)) { 562 ++mob->pt_level; 563 BUG_ON(mob->pt_level > 2); 564 save_pt_iter = pt_iter; 565 num_pt_pages = vmw_mob_build_pt(&data_iter, num_data_pages, 566 &pt_iter); 567 data_iter = save_pt_iter; 568 num_data_pages = num_pt_pages; 569 } 570 571 mob->pt_root_page = vmw_piter_dma_addr(&save_pt_iter); 572 ttm_bo_unreserve(bo); 573 } 574 575 /* 576 * vmw_mob_destroy - Destroy a mob, unpopulating first if necessary. 577 * 578 * @mob: Pointer to a mob to destroy. 579 */ 580 void vmw_mob_destroy(struct vmw_mob *mob) 581 { 582 if (mob->pt_bo) { 583 ttm_bo_put(mob->pt_bo); 584 mob->pt_bo = NULL; 585 } 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 (cmd) { 615 cmd->header.id = SVGA_3D_CMD_DESTROY_GB_MOB; 616 cmd->header.size = sizeof(cmd->body); 617 cmd->body.mobid = mob->id; 618 vmw_fifo_commit(dev_priv, sizeof(*cmd)); 619 } 620 621 if (bo) { 622 vmw_bo_fence_single(bo, NULL); 623 ttm_bo_unreserve(bo); 624 } 625 vmw_fifo_resource_dec(dev_priv); 626 } 627 628 /* 629 * vmw_mob_bind - Make a mob visible to the device after first 630 * populating it if necessary. 631 * 632 * @dev_priv: Pointer to a device private. 633 * @mob: Pointer to the mob we're making visible. 634 * @data_addr: Array of DMA addresses to the data pages of the underlying 635 * buffer object. 636 * @num_data_pages: Number of data pages of the underlying buffer 637 * object. 638 * @mob_id: Device id of the mob to bind 639 * 640 * This function is intended to be interfaced with the ttm_tt backend 641 * code. 642 */ 643 int vmw_mob_bind(struct vmw_private *dev_priv, 644 struct vmw_mob *mob, 645 const struct vmw_sg_table *vsgt, 646 unsigned long num_data_pages, 647 int32_t mob_id) 648 { 649 int ret; 650 bool pt_set_up = false; 651 struct vmw_piter data_iter; 652 struct { 653 SVGA3dCmdHeader header; 654 SVGA3dCmdDefineGBMob64 body; 655 } *cmd; 656 657 mob->id = mob_id; 658 vmw_piter_start(&data_iter, vsgt, 0); 659 if (unlikely(!vmw_piter_next(&data_iter))) 660 return 0; 661 662 if (likely(num_data_pages == 1)) { 663 mob->pt_level = VMW_MOBFMT_PTDEPTH_0; 664 mob->pt_root_page = vmw_piter_dma_addr(&data_iter); 665 } else if (vsgt->num_regions == 1) { 666 mob->pt_level = SVGA3D_MOBFMT_RANGE; 667 mob->pt_root_page = vmw_piter_dma_addr(&data_iter); 668 } else if (unlikely(mob->pt_bo == NULL)) { 669 ret = vmw_mob_pt_populate(dev_priv, mob); 670 if (unlikely(ret != 0)) 671 return ret; 672 673 vmw_mob_pt_setup(mob, data_iter, num_data_pages); 674 pt_set_up = true; 675 mob->pt_level += VMW_MOBFMT_PTDEPTH_1 - SVGA3D_MOBFMT_PTDEPTH_1; 676 } 677 678 vmw_fifo_resource_inc(dev_priv); 679 680 cmd = VMW_FIFO_RESERVE(dev_priv, sizeof(*cmd)); 681 if (unlikely(cmd == NULL)) 682 goto out_no_cmd_space; 683 684 cmd->header.id = SVGA_3D_CMD_DEFINE_GB_MOB64; 685 cmd->header.size = sizeof(cmd->body); 686 cmd->body.mobid = mob_id; 687 cmd->body.ptDepth = mob->pt_level; 688 cmd->body.base = mob->pt_root_page >> PAGE_SHIFT; 689 cmd->body.sizeInBytes = num_data_pages * PAGE_SIZE; 690 691 vmw_fifo_commit(dev_priv, sizeof(*cmd)); 692 693 return 0; 694 695 out_no_cmd_space: 696 vmw_fifo_resource_dec(dev_priv); 697 if (pt_set_up) { 698 ttm_bo_put(mob->pt_bo); 699 mob->pt_bo = NULL; 700 } 701 702 return -ENOMEM; 703 } 704