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 <linux/highmem.h> 29 30#include "vmwgfx_drv.h" 31 32/* 33 * If we set up the screen target otable, screen objects stop working. 34 */ 35 36#define VMW_OTABLE_SETUP_SUB ((VMWGFX_ENABLE_SCREEN_TARGET_OTABLE ? 0 : 1)) 37 38#ifdef CONFIG_64BIT 39#define VMW_PPN_SIZE 8 40#define VMW_MOBFMT_PTDEPTH_0 SVGA3D_MOBFMT_PTDEPTH64_0 41#define VMW_MOBFMT_PTDEPTH_1 SVGA3D_MOBFMT_PTDEPTH64_1 42#define VMW_MOBFMT_PTDEPTH_2 SVGA3D_MOBFMT_PTDEPTH64_2 43#else 44#define VMW_PPN_SIZE 4 45#define VMW_MOBFMT_PTDEPTH_0 SVGA3D_MOBFMT_PTDEPTH_0 46#define VMW_MOBFMT_PTDEPTH_1 SVGA3D_MOBFMT_PTDEPTH_1 47#define VMW_MOBFMT_PTDEPTH_2 SVGA3D_MOBFMT_PTDEPTH_2 48#endif 49 50/* 51 * struct vmw_mob - Structure containing page table and metadata for a 52 * Guest Memory OBject. 53 * 54 * @num_pages Number of pages that make up the page table. 55 * @pt_level The indirection level of the page table. 0-2. 56 * @pt_root_page DMA address of the level 0 page of the page table. 57 */ 58struct vmw_mob { 59 struct ttm_buffer_object *pt_bo; 60 unsigned long num_pages; 61 unsigned pt_level; 62 dma_addr_t pt_root_page; 63 uint32_t id; 64}; 65 66/* 67 * struct vmw_otable - Guest Memory OBject table metadata 68 * 69 * @size: Size of the table (page-aligned). 70 * @page_table: Pointer to a struct vmw_mob holding the page table. 71 */ 72static const struct vmw_otable pre_dx_tables[] = { 73 {VMWGFX_NUM_MOB * SVGA3D_OTABLE_MOB_ENTRY_SIZE, NULL, true}, 74 {VMWGFX_NUM_GB_SURFACE * SVGA3D_OTABLE_SURFACE_ENTRY_SIZE, NULL, true}, 75 {VMWGFX_NUM_GB_CONTEXT * SVGA3D_OTABLE_CONTEXT_ENTRY_SIZE, NULL, true}, 76 {VMWGFX_NUM_GB_SHADER * SVGA3D_OTABLE_SHADER_ENTRY_SIZE, NULL, true}, 77 {VMWGFX_NUM_GB_SCREEN_TARGET * SVGA3D_OTABLE_SCREEN_TARGET_ENTRY_SIZE, 78 NULL, VMWGFX_ENABLE_SCREEN_TARGET_OTABLE} 79}; 80 81static const struct vmw_otable dx_tables[] = { 82 {VMWGFX_NUM_MOB * SVGA3D_OTABLE_MOB_ENTRY_SIZE, NULL, true}, 83 {VMWGFX_NUM_GB_SURFACE * SVGA3D_OTABLE_SURFACE_ENTRY_SIZE, NULL, true}, 84 {VMWGFX_NUM_GB_CONTEXT * SVGA3D_OTABLE_CONTEXT_ENTRY_SIZE, NULL, true}, 85 {VMWGFX_NUM_GB_SHADER * SVGA3D_OTABLE_SHADER_ENTRY_SIZE, NULL, true}, 86 {VMWGFX_NUM_GB_SCREEN_TARGET * SVGA3D_OTABLE_SCREEN_TARGET_ENTRY_SIZE, 87 NULL, VMWGFX_ENABLE_SCREEN_TARGET_OTABLE}, 88 {VMWGFX_NUM_DXCONTEXT * sizeof(SVGAOTableDXContextEntry), NULL, true}, 89}; 90 91static int vmw_mob_pt_populate(struct vmw_private *dev_priv, 92 struct vmw_mob *mob); 93static void vmw_mob_pt_setup(struct vmw_mob *mob, 94 struct vmw_piter data_iter, 95 unsigned long num_data_pages); 96 97/* 98 * vmw_setup_otable_base - Issue an object table base setup command to 99 * the device 100 * 101 * @dev_priv: Pointer to a device private structure 102 * @type: Type of object table base 103 * @offset Start of table offset into dev_priv::otable_bo 104 * @otable Pointer to otable metadata; 105 * 106 * This function returns -ENOMEM if it fails to reserve fifo space, 107 * and may block waiting for fifo space. 108 */ 109static int vmw_setup_otable_base(struct vmw_private *dev_priv, 110 SVGAOTableType type, 111 struct ttm_buffer_object *otable_bo, 112 unsigned long offset, 113 struct vmw_otable *otable) 114{ 115 struct { 116 SVGA3dCmdHeader header; 117 SVGA3dCmdSetOTableBase64 body; 118 } *cmd; 119 struct vmw_mob *mob; 120 const struct vmw_sg_table *vsgt; 121 struct vmw_piter iter; 122 int ret; 123 124 BUG_ON(otable->page_table != NULL); 125 126 vsgt = vmw_bo_sg_table(otable_bo); 127 vmw_piter_start(&iter, vsgt, offset >> PAGE_SHIFT); 128 WARN_ON(!vmw_piter_next(&iter)); 129 130 mob = vmw_mob_create(otable->size >> PAGE_SHIFT); 131 if (unlikely(mob == NULL)) { 132 DRM_ERROR("Failed creating OTable page table.\n"); 133 return -ENOMEM; 134 } 135 136 if (otable->size <= PAGE_SIZE) { 137 mob->pt_level = VMW_MOBFMT_PTDEPTH_0; 138 mob->pt_root_page = vmw_piter_dma_addr(&iter); 139 } else if (vsgt->num_regions == 1) { 140 mob->pt_level = SVGA3D_MOBFMT_RANGE; 141 mob->pt_root_page = vmw_piter_dma_addr(&iter); 142 } else { 143 ret = vmw_mob_pt_populate(dev_priv, mob); 144 if (unlikely(ret != 0)) 145 goto out_no_populate; 146 147 vmw_mob_pt_setup(mob, iter, otable->size >> PAGE_SHIFT); 148 mob->pt_level += VMW_MOBFMT_PTDEPTH_1 - SVGA3D_MOBFMT_PTDEPTH_1; 149 } 150 151 cmd = VMW_FIFO_RESERVE(dev_priv, sizeof(*cmd)); 152 if (unlikely(cmd == NULL)) { 153 ret = -ENOMEM; 154 goto out_no_fifo; 155 } 156 157 memset(cmd, 0, sizeof(*cmd)); 158 cmd->header.id = SVGA_3D_CMD_SET_OTABLE_BASE64; 159 cmd->header.size = sizeof(cmd->body); 160 cmd->body.type = type; 161 cmd->body.baseAddress = mob->pt_root_page >> PAGE_SHIFT; 162 cmd->body.sizeInBytes = otable->size; 163 cmd->body.validSizeInBytes = 0; 164 cmd->body.ptDepth = mob->pt_level; 165 166 /* 167 * The device doesn't support this, But the otable size is 168 * determined at compile-time, so this BUG shouldn't trigger 169 * randomly. 170 */ 171 BUG_ON(mob->pt_level == VMW_MOBFMT_PTDEPTH_2); 172 173 vmw_fifo_commit(dev_priv, sizeof(*cmd)); 174 otable->page_table = mob; 175 176 return 0; 177 178out_no_fifo: 179out_no_populate: 180 vmw_mob_destroy(mob); 181 return ret; 182} 183 184/* 185 * vmw_takedown_otable_base - Issue an object table base takedown command 186 * to the device 187 * 188 * @dev_priv: Pointer to a device private structure 189 * @type: Type of object table base 190 * 191 */ 192static void vmw_takedown_otable_base(struct vmw_private *dev_priv, 193 SVGAOTableType type, 194 struct vmw_otable *otable) 195{ 196 struct { 197 SVGA3dCmdHeader header; 198 SVGA3dCmdSetOTableBase body; 199 } *cmd; 200 struct ttm_buffer_object *bo; 201 202 if (otable->page_table == NULL) 203 return; 204 205 bo = otable->page_table->pt_bo; 206 cmd = VMW_FIFO_RESERVE(dev_priv, sizeof(*cmd)); 207 if (unlikely(cmd == NULL)) 208 return; 209 210 memset(cmd, 0, sizeof(*cmd)); 211 cmd->header.id = SVGA_3D_CMD_SET_OTABLE_BASE; 212 cmd->header.size = sizeof(cmd->body); 213 cmd->body.type = type; 214 cmd->body.baseAddress = 0; 215 cmd->body.sizeInBytes = 0; 216 cmd->body.validSizeInBytes = 0; 217 cmd->body.ptDepth = SVGA3D_MOBFMT_INVALID; 218 vmw_fifo_commit(dev_priv, sizeof(*cmd)); 219 220 if (bo) { 221 int ret; 222 223 ret = ttm_bo_reserve(bo, false, true, NULL); 224 BUG_ON(ret != 0); 225 226 vmw_bo_fence_single(bo, NULL); 227 ttm_bo_unreserve(bo); 228 } 229 230 vmw_mob_destroy(otable->page_table); 231 otable->page_table = NULL; 232} 233 234 235static int vmw_otable_batch_setup(struct vmw_private *dev_priv, 236 struct vmw_otable_batch *batch) 237{ 238 unsigned long offset; 239 unsigned long bo_size; 240 struct vmw_otable *otables = batch->otables; 241 SVGAOTableType i; 242 int ret; 243 244 bo_size = 0; 245 for (i = 0; i < batch->num_otables; ++i) { 246 if (!otables[i].enabled) 247 continue; 248 249 otables[i].size = 250 (otables[i].size + PAGE_SIZE - 1) & PAGE_MASK; 251 bo_size += otables[i].size; 252 } 253 254 ret = vmw_bo_create_and_populate(dev_priv, bo_size, &batch->otable_bo); 255 if (unlikely(ret != 0)) 256 return ret; 257 258 offset = 0; 259 for (i = 0; i < batch->num_otables; ++i) { 260 if (!batch->otables[i].enabled) 261 continue; 262 263 ret = vmw_setup_otable_base(dev_priv, i, batch->otable_bo, 264 offset, 265 &otables[i]); 266 if (unlikely(ret != 0)) 267 goto out_no_setup; 268 offset += otables[i].size; 269 } 270 271 return 0; 272 273out_no_setup: 274 for (i = 0; i < batch->num_otables; ++i) { 275 if (batch->otables[i].enabled) 276 vmw_takedown_otable_base(dev_priv, i, 277 &batch->otables[i]); 278 } 279 280 ttm_bo_put(batch->otable_bo); 281 batch->otable_bo = NULL; 282 return ret; 283} 284 285/* 286 * vmw_otables_setup - Set up guest backed memory object tables 287 * 288 * @dev_priv: Pointer to a device private structure 289 * 290 * Takes care of the device guest backed surface 291 * initialization, by setting up the guest backed memory object tables. 292 * Returns 0 on success and various error codes on failure. A successful return 293 * means the object tables can be taken down using the vmw_otables_takedown 294 * function. 295 */ 296int vmw_otables_setup(struct vmw_private *dev_priv) 297{ 298 struct vmw_otable **otables = &dev_priv->otable_batch.otables; 299 int ret; 300 301 if (has_sm4_context(dev_priv)) { 302 *otables = kmemdup(dx_tables, sizeof(dx_tables), GFP_KERNEL); 303 if (!(*otables)) 304 return -ENOMEM; 305 306 dev_priv->otable_batch.num_otables = ARRAY_SIZE(dx_tables); 307 } else { 308 *otables = kmemdup(pre_dx_tables, sizeof(pre_dx_tables), 309 GFP_KERNEL); 310 if (!(*otables)) 311 return -ENOMEM; 312 313 dev_priv->otable_batch.num_otables = ARRAY_SIZE(pre_dx_tables); 314 } 315 316 ret = vmw_otable_batch_setup(dev_priv, &dev_priv->otable_batch); 317 if (unlikely(ret != 0)) 318 goto out_setup; 319 320 return 0; 321 322out_setup: 323 kfree(*otables); 324 return ret; 325} 326 327static void vmw_otable_batch_takedown(struct vmw_private *dev_priv, 328 struct vmw_otable_batch *batch) 329{ 330 SVGAOTableType i; 331 struct ttm_buffer_object *bo = batch->otable_bo; 332 int ret; 333 334 for (i = 0; i < batch->num_otables; ++i) 335 if (batch->otables[i].enabled) 336 vmw_takedown_otable_base(dev_priv, i, 337 &batch->otables[i]); 338 339 ret = ttm_bo_reserve(bo, false, true, NULL); 340 BUG_ON(ret != 0); 341 342 vmw_bo_fence_single(bo, NULL); 343 ttm_bo_unreserve(bo); 344 345 ttm_bo_put(batch->otable_bo); 346 batch->otable_bo = NULL; 347} 348 349/* 350 * vmw_otables_takedown - Take down guest backed memory object tables 351 * 352 * @dev_priv: Pointer to a device private structure 353 * 354 * Take down the Guest Memory Object tables. 355 */ 356void vmw_otables_takedown(struct vmw_private *dev_priv) 357{ 358 vmw_otable_batch_takedown(dev_priv, &dev_priv->otable_batch); 359 kfree(dev_priv->otable_batch.otables); 360} 361 362/* 363 * vmw_mob_calculate_pt_pages - Calculate the number of page table pages 364 * needed for a guest backed memory object. 365 * 366 * @data_pages: Number of data pages in the memory object buffer. 367 */ 368static unsigned long vmw_mob_calculate_pt_pages(unsigned long data_pages) 369{ 370 unsigned long data_size = data_pages * PAGE_SIZE; 371 unsigned long tot_size = 0; 372 373 while (likely(data_size > PAGE_SIZE)) { 374 data_size = DIV_ROUND_UP(data_size, PAGE_SIZE); 375 data_size *= VMW_PPN_SIZE; 376 tot_size += (data_size + PAGE_SIZE - 1) & PAGE_MASK; 377 } 378 379 return tot_size >> PAGE_SHIFT; 380} 381 382/* 383 * vmw_mob_create - Create a mob, but don't populate it. 384 * 385 * @data_pages: Number of data pages of the underlying buffer object. 386 */ 387struct vmw_mob *vmw_mob_create(unsigned long data_pages) 388{ 389 struct vmw_mob *mob = kzalloc(sizeof(*mob), GFP_KERNEL); 390 391 if (unlikely(!mob)) 392 return NULL; 393 394 mob->num_pages = vmw_mob_calculate_pt_pages(data_pages); 395 396 return mob; 397} 398 399/* 400 * vmw_mob_pt_populate - Populate the mob pagetable 401 * 402 * @mob: Pointer to the mob the pagetable of which we want to 403 * populate. 404 * 405 * This function allocates memory to be used for the pagetable, and 406 * adjusts TTM memory accounting accordingly. Returns ENOMEM if 407 * memory resources aren't sufficient and may cause TTM buffer objects 408 * to be swapped out by using the TTM memory accounting function. 409 */ 410static int vmw_mob_pt_populate(struct vmw_private *dev_priv, 411 struct vmw_mob *mob) 412{ 413 BUG_ON(mob->pt_bo != NULL); 414 415 return vmw_bo_create_and_populate(dev_priv, mob->num_pages * PAGE_SIZE, &mob->pt_bo); 416} 417 418/** 419 * vmw_mob_assign_ppn - Assign a value to a page table entry 420 * 421 * @addr: Pointer to pointer to page table entry. 422 * @val: The page table entry 423 * 424 * Assigns a value to a page table entry pointed to by *@addr and increments 425 * *@addr according to the page table entry size. 426 */ 427#if (VMW_PPN_SIZE == 8) 428static void vmw_mob_assign_ppn(u32 **addr, dma_addr_t val) 429{ 430 *((u64 *) *addr) = val >> PAGE_SHIFT; 431 *addr += 2; 432} 433#else 434static void vmw_mob_assign_ppn(u32 **addr, dma_addr_t val) 435{ 436 *(*addr)++ = val >> PAGE_SHIFT; 437} 438#endif 439 440/* 441 * vmw_mob_build_pt - Build a pagetable 442 * 443 * @data_addr: Array of DMA addresses to the underlying buffer 444 * object's data pages. 445 * @num_data_pages: Number of buffer object data pages. 446 * @pt_pages: Array of page pointers to the page table pages. 447 * 448 * Returns the number of page table pages actually used. 449 * Uses atomic kmaps of highmem pages to avoid TLB thrashing. 450 */ 451static unsigned long vmw_mob_build_pt(struct vmw_piter *data_iter, 452 unsigned long num_data_pages, 453 struct vmw_piter *pt_iter) 454{ 455 unsigned long pt_size = num_data_pages * VMW_PPN_SIZE; 456 unsigned long num_pt_pages = DIV_ROUND_UP(pt_size, PAGE_SIZE); 457 unsigned long pt_page; 458 u32 *addr, *save_addr; 459 unsigned long i; 460 struct page *page; 461 462 for (pt_page = 0; pt_page < num_pt_pages; ++pt_page) { 463 page = vmw_piter_page(pt_iter); 464 465 save_addr = addr = kmap_atomic(page); 466 467 for (i = 0; i < PAGE_SIZE / VMW_PPN_SIZE; ++i) { 468 vmw_mob_assign_ppn(&addr, 469 vmw_piter_dma_addr(data_iter)); 470 if (unlikely(--num_data_pages == 0)) 471 break; 472 WARN_ON(!vmw_piter_next(data_iter)); 473 } 474 kunmap_atomic(save_addr); 475 vmw_piter_next(pt_iter); 476 } 477 478 return num_pt_pages; 479} 480 481/* 482 * vmw_mob_build_pt - Set up a multilevel mob pagetable 483 * 484 * @mob: Pointer to a mob whose page table needs setting up. 485 * @data_addr Array of DMA addresses to the buffer object's data 486 * pages. 487 * @num_data_pages: Number of buffer object data pages. 488 * 489 * Uses tail recursion to set up a multilevel mob page table. 490 */ 491static void vmw_mob_pt_setup(struct vmw_mob *mob, 492 struct vmw_piter data_iter, 493 unsigned long num_data_pages) 494{ 495 unsigned long num_pt_pages = 0; 496 struct ttm_buffer_object *bo = mob->pt_bo; 497 struct vmw_piter save_pt_iter; 498 struct vmw_piter pt_iter; 499 const struct vmw_sg_table *vsgt; 500 int ret; 501 502 ret = ttm_bo_reserve(bo, false, true, NULL); 503 BUG_ON(ret != 0); 504 505 vsgt = vmw_bo_sg_table(bo); 506 vmw_piter_start(&pt_iter, vsgt, 0); 507 BUG_ON(!vmw_piter_next(&pt_iter)); 508 mob->pt_level = 0; 509 while (likely(num_data_pages > 1)) { 510 ++mob->pt_level; 511 BUG_ON(mob->pt_level > 2); 512 save_pt_iter = pt_iter; 513 num_pt_pages = vmw_mob_build_pt(&data_iter, num_data_pages, 514 &pt_iter); 515 data_iter = save_pt_iter; 516 num_data_pages = num_pt_pages; 517 } 518 519 mob->pt_root_page = vmw_piter_dma_addr(&save_pt_iter); 520 ttm_bo_unreserve(bo); 521} 522 523/* 524 * vmw_mob_destroy - Destroy a mob, unpopulating first if necessary. 525 * 526 * @mob: Pointer to a mob to destroy. 527 */ 528void vmw_mob_destroy(struct vmw_mob *mob) 529{ 530 if (mob->pt_bo) { 531 ttm_bo_put(mob->pt_bo); 532 mob->pt_bo = NULL; 533 } 534 kfree(mob); 535} 536 537/* 538 * vmw_mob_unbind - Hide a mob from the device. 539 * 540 * @dev_priv: Pointer to a device private. 541 * @mob_id: Device id of the mob to unbind. 542 */ 543void vmw_mob_unbind(struct vmw_private *dev_priv, 544 struct vmw_mob *mob) 545{ 546 struct { 547 SVGA3dCmdHeader header; 548 SVGA3dCmdDestroyGBMob body; 549 } *cmd; 550 int ret; 551 struct ttm_buffer_object *bo = mob->pt_bo; 552 553 if (bo) { 554 ret = ttm_bo_reserve(bo, false, true, NULL); 555 /* 556 * Noone else should be using this buffer. 557 */ 558 BUG_ON(ret != 0); 559 } 560 561 cmd = VMW_FIFO_RESERVE(dev_priv, sizeof(*cmd)); 562 if (cmd) { 563 cmd->header.id = SVGA_3D_CMD_DESTROY_GB_MOB; 564 cmd->header.size = sizeof(cmd->body); 565 cmd->body.mobid = mob->id; 566 vmw_fifo_commit(dev_priv, sizeof(*cmd)); 567 } 568 569 if (bo) { 570 vmw_bo_fence_single(bo, NULL); 571 ttm_bo_unreserve(bo); 572 } 573 vmw_fifo_resource_dec(dev_priv); 574} 575 576/* 577 * vmw_mob_bind - Make a mob visible to the device after first 578 * populating it if necessary. 579 * 580 * @dev_priv: Pointer to a device private. 581 * @mob: Pointer to the mob we're making visible. 582 * @data_addr: Array of DMA addresses to the data pages of the underlying 583 * buffer object. 584 * @num_data_pages: Number of data pages of the underlying buffer 585 * object. 586 * @mob_id: Device id of the mob to bind 587 * 588 * This function is intended to be interfaced with the ttm_tt backend 589 * code. 590 */ 591int vmw_mob_bind(struct vmw_private *dev_priv, 592 struct vmw_mob *mob, 593 const struct vmw_sg_table *vsgt, 594 unsigned long num_data_pages, 595 int32_t mob_id) 596{ 597 int ret; 598 bool pt_set_up = false; 599 struct vmw_piter data_iter; 600 struct { 601 SVGA3dCmdHeader header; 602 SVGA3dCmdDefineGBMob64 body; 603 } *cmd; 604 605 mob->id = mob_id; 606 vmw_piter_start(&data_iter, vsgt, 0); 607 if (unlikely(!vmw_piter_next(&data_iter))) 608 return 0; 609 610 if (likely(num_data_pages == 1)) { 611 mob->pt_level = VMW_MOBFMT_PTDEPTH_0; 612 mob->pt_root_page = vmw_piter_dma_addr(&data_iter); 613 } else if (vsgt->num_regions == 1) { 614 mob->pt_level = SVGA3D_MOBFMT_RANGE; 615 mob->pt_root_page = vmw_piter_dma_addr(&data_iter); 616 } else if (unlikely(mob->pt_bo == NULL)) { 617 ret = vmw_mob_pt_populate(dev_priv, mob); 618 if (unlikely(ret != 0)) 619 return ret; 620 621 vmw_mob_pt_setup(mob, data_iter, num_data_pages); 622 pt_set_up = true; 623 mob->pt_level += VMW_MOBFMT_PTDEPTH_1 - SVGA3D_MOBFMT_PTDEPTH_1; 624 } 625 626 vmw_fifo_resource_inc(dev_priv); 627 628 cmd = VMW_FIFO_RESERVE(dev_priv, sizeof(*cmd)); 629 if (unlikely(cmd == NULL)) 630 goto out_no_cmd_space; 631 632 cmd->header.id = SVGA_3D_CMD_DEFINE_GB_MOB64; 633 cmd->header.size = sizeof(cmd->body); 634 cmd->body.mobid = mob_id; 635 cmd->body.ptDepth = mob->pt_level; 636 cmd->body.base = mob->pt_root_page >> PAGE_SHIFT; 637 cmd->body.sizeInBytes = num_data_pages * PAGE_SIZE; 638 639 vmw_fifo_commit(dev_priv, sizeof(*cmd)); 640 641 return 0; 642 643out_no_cmd_space: 644 vmw_fifo_resource_dec(dev_priv); 645 if (pt_set_up) { 646 ttm_bo_put(mob->pt_bo); 647 mob->pt_bo = NULL; 648 } 649 650 return -ENOMEM; 651} 652