1 // SPDX-License-Identifier: GPL-2.0 OR MIT
2 /**************************************************************************
3 *
4 * Copyright 2012-2023 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_bo.h"
29 #include "vmwgfx_drv.h"
30
31 #include <linux/highmem.h>
32
33 #ifdef CONFIG_64BIT
34 #define VMW_PPN_SIZE 8
35 #define VMW_MOBFMT_PTDEPTH_0 SVGA3D_MOBFMT_PT64_0
36 #define VMW_MOBFMT_PTDEPTH_1 SVGA3D_MOBFMT_PT64_1
37 #define VMW_MOBFMT_PTDEPTH_2 SVGA3D_MOBFMT_PT64_2
38 #else
39 #define VMW_PPN_SIZE 4
40 #define VMW_MOBFMT_PTDEPTH_0 SVGA3D_MOBFMT_PT_0
41 #define VMW_MOBFMT_PTDEPTH_1 SVGA3D_MOBFMT_PT_1
42 #define VMW_MOBFMT_PTDEPTH_2 SVGA3D_MOBFMT_PT_2
43 #endif
44
45 /*
46 * struct vmw_mob - Structure containing page table and metadata for a
47 * Guest Memory OBject.
48 *
49 * @num_pages Number of pages that make up the page table.
50 * @pt_level The indirection level of the page table. 0-2.
51 * @pt_root_page DMA address of the level 0 page of the page table.
52 */
53 struct vmw_mob {
54 struct vmw_bo *pt_bo;
55 unsigned long num_pages;
56 unsigned pt_level;
57 dma_addr_t pt_root_page;
58 uint32_t id;
59 };
60
61 /*
62 * struct vmw_otable - Guest Memory OBject table metadata
63 *
64 * @size: Size of the table (page-aligned).
65 * @page_table: Pointer to a struct vmw_mob holding the page table.
66 */
67 static const struct vmw_otable pre_dx_tables[] = {
68 {VMWGFX_NUM_MOB * sizeof(SVGAOTableMobEntry), NULL, true},
69 {VMWGFX_NUM_GB_SURFACE * sizeof(SVGAOTableSurfaceEntry), NULL, true},
70 {VMWGFX_NUM_GB_CONTEXT * sizeof(SVGAOTableContextEntry), NULL, true},
71 {VMWGFX_NUM_GB_SHADER * sizeof(SVGAOTableShaderEntry), NULL, true},
72 {VMWGFX_NUM_GB_SCREEN_TARGET * sizeof(SVGAOTableScreenTargetEntry),
73 NULL, true}
74 };
75
76 static const struct vmw_otable dx_tables[] = {
77 {VMWGFX_NUM_MOB * sizeof(SVGAOTableMobEntry), NULL, true},
78 {VMWGFX_NUM_GB_SURFACE * sizeof(SVGAOTableSurfaceEntry), NULL, true},
79 {VMWGFX_NUM_GB_CONTEXT * sizeof(SVGAOTableContextEntry), NULL, true},
80 {VMWGFX_NUM_GB_SHADER * sizeof(SVGAOTableShaderEntry), NULL, true},
81 {VMWGFX_NUM_GB_SCREEN_TARGET * sizeof(SVGAOTableScreenTargetEntry),
82 NULL, true},
83 {VMWGFX_NUM_DXCONTEXT * sizeof(SVGAOTableDXContextEntry), NULL, true},
84 };
85
86 static int vmw_mob_pt_populate(struct vmw_private *dev_priv,
87 struct vmw_mob *mob);
88 static void vmw_mob_pt_setup(struct vmw_mob *mob,
89 struct vmw_piter data_iter,
90 unsigned long num_data_pages);
91
92
vmw_bo_unpin_unlocked(struct ttm_buffer_object * bo)93 static inline void vmw_bo_unpin_unlocked(struct ttm_buffer_object *bo)
94 {
95 int ret = ttm_bo_reserve(bo, false, true, NULL);
96 BUG_ON(ret != 0);
97 ttm_bo_unpin(bo);
98 ttm_bo_unreserve(bo);
99 }
100
101
102 /*
103 * vmw_setup_otable_base - Issue an object table base setup command to
104 * the device
105 *
106 * @dev_priv: Pointer to a device private structure
107 * @type: Type of object table base
108 * @offset Start of table offset into dev_priv::otable_bo
109 * @otable Pointer to otable metadata;
110 *
111 * This function returns -ENOMEM if it fails to reserve fifo space,
112 * and may block waiting for fifo space.
113 */
vmw_setup_otable_base(struct vmw_private * dev_priv,SVGAOTableType type,struct ttm_buffer_object * otable_bo,unsigned long offset,struct vmw_otable * otable)114 static int vmw_setup_otable_base(struct vmw_private *dev_priv,
115 SVGAOTableType type,
116 struct ttm_buffer_object *otable_bo,
117 unsigned long offset,
118 struct vmw_otable *otable)
119 {
120 struct {
121 SVGA3dCmdHeader header;
122 SVGA3dCmdSetOTableBase64 body;
123 } *cmd;
124 struct vmw_mob *mob;
125 const struct vmw_sg_table *vsgt;
126 struct vmw_piter iter;
127 int ret;
128
129 BUG_ON(otable->page_table != NULL);
130
131 vsgt = vmw_bo_sg_table(otable_bo);
132 vmw_piter_start(&iter, vsgt, offset >> PAGE_SHIFT);
133 WARN_ON(!vmw_piter_next(&iter));
134
135 mob = vmw_mob_create(otable->size >> PAGE_SHIFT);
136 if (unlikely(mob == NULL)) {
137 DRM_ERROR("Failed creating OTable page table.\n");
138 return -ENOMEM;
139 }
140
141 if (otable->size <= PAGE_SIZE) {
142 mob->pt_level = VMW_MOBFMT_PTDEPTH_0;
143 mob->pt_root_page = vmw_piter_dma_addr(&iter);
144 } else {
145 ret = vmw_mob_pt_populate(dev_priv, mob);
146 if (unlikely(ret != 0))
147 goto out_no_populate;
148
149 vmw_mob_pt_setup(mob, iter, otable->size >> PAGE_SHIFT);
150 mob->pt_level += VMW_MOBFMT_PTDEPTH_1 - SVGA3D_MOBFMT_PT_1;
151 }
152
153 cmd = VMW_CMD_RESERVE(dev_priv, sizeof(*cmd));
154 if (unlikely(cmd == NULL)) {
155 ret = -ENOMEM;
156 goto out_no_fifo;
157 }
158
159 memset(cmd, 0, sizeof(*cmd));
160 cmd->header.id = SVGA_3D_CMD_SET_OTABLE_BASE64;
161 cmd->header.size = sizeof(cmd->body);
162 cmd->body.type = type;
163 cmd->body.baseAddress = mob->pt_root_page >> PAGE_SHIFT;
164 cmd->body.sizeInBytes = otable->size;
165 cmd->body.validSizeInBytes = 0;
166 cmd->body.ptDepth = mob->pt_level;
167
168 /*
169 * The device doesn't support this, But the otable size is
170 * determined at compile-time, so this BUG shouldn't trigger
171 * randomly.
172 */
173 BUG_ON(mob->pt_level == VMW_MOBFMT_PTDEPTH_2);
174
175 vmw_cmd_commit(dev_priv, sizeof(*cmd));
176 otable->page_table = mob;
177
178 return 0;
179
180 out_no_fifo:
181 out_no_populate:
182 vmw_mob_destroy(mob);
183 return ret;
184 }
185
186 /*
187 * vmw_takedown_otable_base - Issue an object table base takedown command
188 * to the device
189 *
190 * @dev_priv: Pointer to a device private structure
191 * @type: Type of object table base
192 *
193 */
vmw_takedown_otable_base(struct vmw_private * dev_priv,SVGAOTableType type,struct vmw_otable * otable)194 static void vmw_takedown_otable_base(struct vmw_private *dev_priv,
195 SVGAOTableType type,
196 struct vmw_otable *otable)
197 {
198 struct {
199 SVGA3dCmdHeader header;
200 SVGA3dCmdSetOTableBase body;
201 } *cmd;
202 struct ttm_buffer_object *bo;
203
204 if (otable->page_table == NULL)
205 return;
206
207 bo = &otable->page_table->pt_bo->tbo;
208 cmd = VMW_CMD_RESERVE(dev_priv, sizeof(*cmd));
209 if (unlikely(cmd == NULL))
210 return;
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_cmd_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_bo_fence_single(bo, NULL);
229 ttm_bo_unreserve(bo);
230 }
231
232 vmw_mob_destroy(otable->page_table);
233 otable->page_table = NULL;
234 }
235
236
vmw_otable_batch_setup(struct vmw_private * dev_priv,struct vmw_otable_batch * batch)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 = PFN_ALIGN(otables[i].size);
252 bo_size += otables[i].size;
253 }
254
255 ret = vmw_bo_create_and_populate(dev_priv, bo_size,
256 VMW_BO_DOMAIN_WAITABLE_SYS,
257 &batch->otable_bo);
258 if (unlikely(ret != 0))
259 return ret;
260
261 offset = 0;
262 for (i = 0; i < batch->num_otables; ++i) {
263 if (!batch->otables[i].enabled)
264 continue;
265
266 ret = vmw_setup_otable_base(dev_priv, i,
267 &batch->otable_bo->tbo,
268 offset,
269 &otables[i]);
270 if (unlikely(ret != 0))
271 goto out_no_setup;
272 offset += otables[i].size;
273 }
274
275 return 0;
276
277 out_no_setup:
278 for (i = 0; i < batch->num_otables; ++i) {
279 if (batch->otables[i].enabled)
280 vmw_takedown_otable_base(dev_priv, i,
281 &batch->otables[i]);
282 }
283
284 vmw_bo_unpin_unlocked(&batch->otable_bo->tbo);
285 vmw_bo_unreference(&batch->otable_bo);
286 return ret;
287 }
288
289 /*
290 * vmw_otables_setup - Set up guest backed memory object tables
291 *
292 * @dev_priv: Pointer to a device private structure
293 *
294 * Takes care of the device guest backed surface
295 * initialization, by setting up the guest backed memory object tables.
296 * Returns 0 on success and various error codes on failure. A successful return
297 * means the object tables can be taken down using the vmw_otables_takedown
298 * function.
299 */
vmw_otables_setup(struct vmw_private * dev_priv)300 int vmw_otables_setup(struct vmw_private *dev_priv)
301 {
302 struct vmw_otable **otables = &dev_priv->otable_batch.otables;
303 int ret;
304
305 if (has_sm4_context(dev_priv)) {
306 *otables = kmemdup(dx_tables, sizeof(dx_tables), GFP_KERNEL);
307 if (!(*otables))
308 return -ENOMEM;
309
310 dev_priv->otable_batch.num_otables = ARRAY_SIZE(dx_tables);
311 } else {
312 *otables = kmemdup(pre_dx_tables, sizeof(pre_dx_tables),
313 GFP_KERNEL);
314 if (!(*otables))
315 return -ENOMEM;
316
317 dev_priv->otable_batch.num_otables = ARRAY_SIZE(pre_dx_tables);
318 }
319
320 ret = vmw_otable_batch_setup(dev_priv, &dev_priv->otable_batch);
321 if (unlikely(ret != 0))
322 goto out_setup;
323
324 return 0;
325
326 out_setup:
327 kfree(*otables);
328 return ret;
329 }
330
vmw_otable_batch_takedown(struct vmw_private * dev_priv,struct vmw_otable_batch * batch)331 static void vmw_otable_batch_takedown(struct vmw_private *dev_priv,
332 struct vmw_otable_batch *batch)
333 {
334 SVGAOTableType i;
335 struct ttm_buffer_object *bo = &batch->otable_bo->tbo;
336 int ret;
337
338 for (i = 0; i < batch->num_otables; ++i)
339 if (batch->otables[i].enabled)
340 vmw_takedown_otable_base(dev_priv, i,
341 &batch->otables[i]);
342
343 ret = ttm_bo_reserve(bo, false, true, NULL);
344 BUG_ON(ret != 0);
345
346 vmw_bo_fence_single(bo, NULL);
347 ttm_bo_unpin(bo);
348 ttm_bo_unreserve(bo);
349
350 vmw_bo_unreference(&batch->otable_bo);
351 }
352
353 /*
354 * vmw_otables_takedown - Take down guest backed memory object tables
355 *
356 * @dev_priv: Pointer to a device private structure
357 *
358 * Take down the Guest Memory Object tables.
359 */
vmw_otables_takedown(struct vmw_private * dev_priv)360 void vmw_otables_takedown(struct vmw_private *dev_priv)
361 {
362 vmw_otable_batch_takedown(dev_priv, &dev_priv->otable_batch);
363 kfree(dev_priv->otable_batch.otables);
364 }
365
366 /*
367 * vmw_mob_calculate_pt_pages - Calculate the number of page table pages
368 * needed for a guest backed memory object.
369 *
370 * @data_pages: Number of data pages in the memory object buffer.
371 */
vmw_mob_calculate_pt_pages(unsigned long data_pages)372 static unsigned long vmw_mob_calculate_pt_pages(unsigned long data_pages)
373 {
374 unsigned long data_size = data_pages * PAGE_SIZE;
375 unsigned long tot_size = 0;
376
377 while (likely(data_size > PAGE_SIZE)) {
378 data_size = DIV_ROUND_UP(data_size, PAGE_SIZE);
379 data_size *= VMW_PPN_SIZE;
380 tot_size += PFN_ALIGN(data_size);
381 }
382
383 return tot_size >> PAGE_SHIFT;
384 }
385
386 /*
387 * vmw_mob_create - Create a mob, but don't populate it.
388 *
389 * @data_pages: Number of data pages of the underlying buffer object.
390 */
vmw_mob_create(unsigned long data_pages)391 struct vmw_mob *vmw_mob_create(unsigned long data_pages)
392 {
393 struct vmw_mob *mob = kzalloc(sizeof(*mob), GFP_KERNEL);
394
395 if (unlikely(!mob))
396 return NULL;
397
398 mob->num_pages = vmw_mob_calculate_pt_pages(data_pages);
399
400 return mob;
401 }
402
403 /*
404 * vmw_mob_pt_populate - Populate the mob pagetable
405 *
406 * @mob: Pointer to the mob the pagetable of which we want to
407 * populate.
408 *
409 * This function allocates memory to be used for the pagetable.
410 * Returns ENOMEM if memory resources aren't sufficient and may
411 * cause TTM buffer objects to be swapped out.
412 */
vmw_mob_pt_populate(struct vmw_private * dev_priv,struct vmw_mob * mob)413 static int vmw_mob_pt_populate(struct vmw_private *dev_priv,
414 struct vmw_mob *mob)
415 {
416 BUG_ON(mob->pt_bo != NULL);
417
418 return vmw_bo_create_and_populate(dev_priv, mob->num_pages * PAGE_SIZE,
419 VMW_BO_DOMAIN_WAITABLE_SYS,
420 &mob->pt_bo);
421 }
422
423 /**
424 * vmw_mob_assign_ppn - Assign a value to a page table entry
425 *
426 * @addr: Pointer to pointer to page table entry.
427 * @val: The page table entry
428 *
429 * Assigns a value to a page table entry pointed to by *@addr and increments
430 * *@addr according to the page table entry size.
431 */
432 #if (VMW_PPN_SIZE == 8)
vmw_mob_assign_ppn(u32 ** addr,dma_addr_t val)433 static void vmw_mob_assign_ppn(u32 **addr, dma_addr_t val)
434 {
435 *((u64 *) *addr) = val >> PAGE_SHIFT;
436 *addr += 2;
437 }
438 #else
vmw_mob_assign_ppn(u32 ** addr,dma_addr_t val)439 static void vmw_mob_assign_ppn(u32 **addr, dma_addr_t val)
440 {
441 *(*addr)++ = val >> PAGE_SHIFT;
442 }
443 #endif
444
445 /*
446 * vmw_mob_build_pt - Build a pagetable
447 *
448 * @data_addr: Array of DMA addresses to the underlying buffer
449 * object's data pages.
450 * @num_data_pages: Number of buffer object data pages.
451 * @pt_pages: Array of page pointers to the page table pages.
452 *
453 * Returns the number of page table pages actually used.
454 * Uses atomic kmaps of highmem pages to avoid TLB thrashing.
455 */
vmw_mob_build_pt(struct vmw_piter * data_iter,unsigned long num_data_pages,struct vmw_piter * pt_iter)456 static unsigned long vmw_mob_build_pt(struct vmw_piter *data_iter,
457 unsigned long num_data_pages,
458 struct vmw_piter *pt_iter)
459 {
460 unsigned long pt_size = num_data_pages * VMW_PPN_SIZE;
461 unsigned long num_pt_pages = DIV_ROUND_UP(pt_size, PAGE_SIZE);
462 unsigned long pt_page;
463 u32 *addr, *save_addr;
464 unsigned long i;
465 struct page *page;
466
467 for (pt_page = 0; pt_page < num_pt_pages; ++pt_page) {
468 page = vmw_piter_page(pt_iter);
469
470 save_addr = addr = kmap_atomic(page);
471
472 for (i = 0; i < PAGE_SIZE / VMW_PPN_SIZE; ++i) {
473 vmw_mob_assign_ppn(&addr,
474 vmw_piter_dma_addr(data_iter));
475 if (unlikely(--num_data_pages == 0))
476 break;
477 WARN_ON(!vmw_piter_next(data_iter));
478 }
479 kunmap_atomic(save_addr);
480 vmw_piter_next(pt_iter);
481 }
482
483 return num_pt_pages;
484 }
485
486 /*
487 * vmw_mob_build_pt - Set up a multilevel mob pagetable
488 *
489 * @mob: Pointer to a mob whose page table needs setting up.
490 * @data_addr Array of DMA addresses to the buffer object's data
491 * pages.
492 * @num_data_pages: Number of buffer object data pages.
493 *
494 * Uses tail recursion to set up a multilevel mob page table.
495 */
vmw_mob_pt_setup(struct vmw_mob * mob,struct vmw_piter data_iter,unsigned long num_data_pages)496 static void vmw_mob_pt_setup(struct vmw_mob *mob,
497 struct vmw_piter data_iter,
498 unsigned long num_data_pages)
499 {
500 unsigned long num_pt_pages = 0;
501 struct ttm_buffer_object *bo = &mob->pt_bo->tbo;
502 struct vmw_piter save_pt_iter = {0};
503 struct vmw_piter pt_iter;
504 const struct vmw_sg_table *vsgt;
505 int ret;
506
507 BUG_ON(num_data_pages == 0);
508
509 ret = ttm_bo_reserve(bo, false, true, NULL);
510 BUG_ON(ret != 0);
511
512 vsgt = vmw_bo_sg_table(bo);
513 vmw_piter_start(&pt_iter, vsgt, 0);
514 BUG_ON(!vmw_piter_next(&pt_iter));
515 mob->pt_level = 0;
516 while (likely(num_data_pages > 1)) {
517 ++mob->pt_level;
518 BUG_ON(mob->pt_level > 2);
519 save_pt_iter = pt_iter;
520 num_pt_pages = vmw_mob_build_pt(&data_iter, num_data_pages,
521 &pt_iter);
522 data_iter = save_pt_iter;
523 num_data_pages = num_pt_pages;
524 }
525
526 mob->pt_root_page = vmw_piter_dma_addr(&save_pt_iter);
527 ttm_bo_unreserve(bo);
528 }
529
530 /*
531 * vmw_mob_destroy - Destroy a mob, unpopulating first if necessary.
532 *
533 * @mob: Pointer to a mob to destroy.
534 */
vmw_mob_destroy(struct vmw_mob * mob)535 void vmw_mob_destroy(struct vmw_mob *mob)
536 {
537 if (mob->pt_bo) {
538 vmw_bo_unpin_unlocked(&mob->pt_bo->tbo);
539 vmw_bo_unreference(&mob->pt_bo);
540 }
541 kfree(mob);
542 }
543
544 /*
545 * vmw_mob_unbind - Hide a mob from the device.
546 *
547 * @dev_priv: Pointer to a device private.
548 * @mob_id: Device id of the mob to unbind.
549 */
vmw_mob_unbind(struct vmw_private * dev_priv,struct vmw_mob * mob)550 void vmw_mob_unbind(struct vmw_private *dev_priv,
551 struct vmw_mob *mob)
552 {
553 struct {
554 SVGA3dCmdHeader header;
555 SVGA3dCmdDestroyGBMob body;
556 } *cmd;
557 int ret;
558 struct ttm_buffer_object *bo = &mob->pt_bo->tbo;
559
560 if (bo) {
561 ret = ttm_bo_reserve(bo, false, true, NULL);
562 /*
563 * Noone else should be using this buffer.
564 */
565 BUG_ON(ret != 0);
566 }
567
568 cmd = VMW_CMD_RESERVE(dev_priv, sizeof(*cmd));
569 if (cmd) {
570 cmd->header.id = SVGA_3D_CMD_DESTROY_GB_MOB;
571 cmd->header.size = sizeof(cmd->body);
572 cmd->body.mobid = mob->id;
573 vmw_cmd_commit(dev_priv, sizeof(*cmd));
574 }
575
576 if (bo) {
577 vmw_bo_fence_single(bo, NULL);
578 ttm_bo_unreserve(bo);
579 }
580 vmw_fifo_resource_dec(dev_priv);
581 }
582
583 /*
584 * vmw_mob_bind - Make a mob visible to the device after first
585 * populating it if necessary.
586 *
587 * @dev_priv: Pointer to a device private.
588 * @mob: Pointer to the mob we're making visible.
589 * @data_addr: Array of DMA addresses to the data pages of the underlying
590 * buffer object.
591 * @num_data_pages: Number of data pages of the underlying buffer
592 * object.
593 * @mob_id: Device id of the mob to bind
594 *
595 * This function is intended to be interfaced with the ttm_tt backend
596 * code.
597 */
vmw_mob_bind(struct vmw_private * dev_priv,struct vmw_mob * mob,const struct vmw_sg_table * vsgt,unsigned long num_data_pages,int32_t mob_id)598 int vmw_mob_bind(struct vmw_private *dev_priv,
599 struct vmw_mob *mob,
600 const struct vmw_sg_table *vsgt,
601 unsigned long num_data_pages,
602 int32_t mob_id)
603 {
604 int ret;
605 bool pt_set_up = false;
606 struct vmw_piter data_iter;
607 struct {
608 SVGA3dCmdHeader header;
609 SVGA3dCmdDefineGBMob64 body;
610 } *cmd;
611
612 mob->id = mob_id;
613 vmw_piter_start(&data_iter, vsgt, 0);
614 if (unlikely(!vmw_piter_next(&data_iter)))
615 return 0;
616
617 if (likely(num_data_pages == 1)) {
618 mob->pt_level = VMW_MOBFMT_PTDEPTH_0;
619 mob->pt_root_page = vmw_piter_dma_addr(&data_iter);
620 } else if (unlikely(mob->pt_bo == NULL)) {
621 ret = vmw_mob_pt_populate(dev_priv, mob);
622 if (unlikely(ret != 0))
623 return ret;
624
625 vmw_mob_pt_setup(mob, data_iter, num_data_pages);
626 pt_set_up = true;
627 mob->pt_level += VMW_MOBFMT_PTDEPTH_1 - SVGA3D_MOBFMT_PT_1;
628 }
629
630 vmw_fifo_resource_inc(dev_priv);
631
632 cmd = VMW_CMD_RESERVE(dev_priv, sizeof(*cmd));
633 if (unlikely(cmd == NULL))
634 goto out_no_cmd_space;
635
636 cmd->header.id = SVGA_3D_CMD_DEFINE_GB_MOB64;
637 cmd->header.size = sizeof(cmd->body);
638 cmd->body.mobid = mob_id;
639 cmd->body.ptDepth = mob->pt_level;
640 cmd->body.base = mob->pt_root_page >> PAGE_SHIFT;
641 cmd->body.sizeInBytes = num_data_pages * PAGE_SIZE;
642
643 vmw_cmd_commit(dev_priv, sizeof(*cmd));
644
645 return 0;
646
647 out_no_cmd_space:
648 vmw_fifo_resource_dec(dev_priv);
649 if (pt_set_up) {
650 vmw_bo_unpin_unlocked(&mob->pt_bo->tbo);
651 vmw_bo_unreference(&mob->pt_bo);
652 }
653
654 return -ENOMEM;
655 }
656