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_PT64_0
41 #define VMW_MOBFMT_PTDEPTH_1 SVGA3D_MOBFMT_PT64_1
42 #define VMW_MOBFMT_PTDEPTH_2 SVGA3D_MOBFMT_PT64_2
43 #else
44 #define VMW_PPN_SIZE 4
45 #define VMW_MOBFMT_PTDEPTH_0 SVGA3D_MOBFMT_PT_0
46 #define VMW_MOBFMT_PTDEPTH_1 SVGA3D_MOBFMT_PT_1
47 #define VMW_MOBFMT_PTDEPTH_2 SVGA3D_MOBFMT_PT_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 */
58 struct 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 */
72 static const struct vmw_otable pre_dx_tables[] = {
73 {VMWGFX_NUM_MOB * sizeof(SVGAOTableMobEntry), NULL, true},
74 {VMWGFX_NUM_GB_SURFACE * sizeof(SVGAOTableSurfaceEntry), NULL, true},
75 {VMWGFX_NUM_GB_CONTEXT * sizeof(SVGAOTableContextEntry), NULL, true},
76 {VMWGFX_NUM_GB_SHADER * sizeof(SVGAOTableShaderEntry), NULL, true},
77 {VMWGFX_NUM_GB_SCREEN_TARGET * sizeof(SVGAOTableScreenTargetEntry),
78 NULL, VMWGFX_ENABLE_SCREEN_TARGET_OTABLE}
79 };
80
81 static const struct vmw_otable dx_tables[] = {
82 {VMWGFX_NUM_MOB * sizeof(SVGAOTableMobEntry), NULL, true},
83 {VMWGFX_NUM_GB_SURFACE * sizeof(SVGAOTableSurfaceEntry), NULL, true},
84 {VMWGFX_NUM_GB_CONTEXT * sizeof(SVGAOTableContextEntry), NULL, true},
85 {VMWGFX_NUM_GB_SHADER * sizeof(SVGAOTableShaderEntry), NULL, true},
86 {VMWGFX_NUM_GB_SCREEN_TARGET * sizeof(SVGAOTableScreenTargetEntry),
87 NULL, VMWGFX_ENABLE_SCREEN_TARGET_OTABLE},
88 {VMWGFX_NUM_DXCONTEXT * sizeof(SVGAOTableDXContextEntry), NULL, true},
89 };
90
91 static int vmw_mob_pt_populate(struct vmw_private *dev_priv,
92 struct vmw_mob *mob);
93 static void vmw_mob_pt_setup(struct vmw_mob *mob,
94 struct vmw_piter data_iter,
95 unsigned long num_data_pages);
96
97
vmw_bo_unpin_unlocked(struct ttm_buffer_object * bo)98 static inline void vmw_bo_unpin_unlocked(struct ttm_buffer_object *bo)
99 {
100 int ret = ttm_bo_reserve(bo, false, true, NULL);
101 BUG_ON(ret != 0);
102 ttm_bo_unpin(bo);
103 ttm_bo_unreserve(bo);
104 }
105
106
107 /*
108 * vmw_setup_otable_base - Issue an object table base setup command to
109 * the device
110 *
111 * @dev_priv: Pointer to a device private structure
112 * @type: Type of object table base
113 * @offset Start of table offset into dev_priv::otable_bo
114 * @otable Pointer to otable metadata;
115 *
116 * This function returns -ENOMEM if it fails to reserve fifo space,
117 * and may block waiting for fifo space.
118 */
vmw_setup_otable_base(struct vmw_private * dev_priv,SVGAOTableType type,struct ttm_buffer_object * otable_bo,unsigned long offset,struct vmw_otable * otable)119 static int vmw_setup_otable_base(struct vmw_private *dev_priv,
120 SVGAOTableType type,
121 struct ttm_buffer_object *otable_bo,
122 unsigned long offset,
123 struct vmw_otable *otable)
124 {
125 struct {
126 SVGA3dCmdHeader header;
127 SVGA3dCmdSetOTableBase64 body;
128 } *cmd;
129 struct vmw_mob *mob;
130 const struct vmw_sg_table *vsgt;
131 struct vmw_piter iter;
132 int ret;
133
134 BUG_ON(otable->page_table != NULL);
135
136 vsgt = vmw_bo_sg_table(otable_bo);
137 vmw_piter_start(&iter, vsgt, offset >> PAGE_SHIFT);
138 WARN_ON(!vmw_piter_next(&iter));
139
140 mob = vmw_mob_create(otable->size >> PAGE_SHIFT);
141 if (unlikely(mob == NULL)) {
142 DRM_ERROR("Failed creating OTable page table.\n");
143 return -ENOMEM;
144 }
145
146 if (otable->size <= PAGE_SIZE) {
147 mob->pt_level = VMW_MOBFMT_PTDEPTH_0;
148 mob->pt_root_page = vmw_piter_dma_addr(&iter);
149 } else if (vsgt->num_regions == 1) {
150 mob->pt_level = SVGA3D_MOBFMT_RANGE;
151 mob->pt_root_page = vmw_piter_dma_addr(&iter);
152 } else {
153 ret = vmw_mob_pt_populate(dev_priv, mob);
154 if (unlikely(ret != 0))
155 goto out_no_populate;
156
157 vmw_mob_pt_setup(mob, iter, otable->size >> PAGE_SHIFT);
158 mob->pt_level += VMW_MOBFMT_PTDEPTH_1 - SVGA3D_MOBFMT_PT_1;
159 }
160
161 cmd = VMW_CMD_RESERVE(dev_priv, sizeof(*cmd));
162 if (unlikely(cmd == NULL)) {
163 ret = -ENOMEM;
164 goto out_no_fifo;
165 }
166
167 memset(cmd, 0, sizeof(*cmd));
168 cmd->header.id = SVGA_3D_CMD_SET_OTABLE_BASE64;
169 cmd->header.size = sizeof(cmd->body);
170 cmd->body.type = type;
171 cmd->body.baseAddress = mob->pt_root_page >> PAGE_SHIFT;
172 cmd->body.sizeInBytes = otable->size;
173 cmd->body.validSizeInBytes = 0;
174 cmd->body.ptDepth = mob->pt_level;
175
176 /*
177 * The device doesn't support this, But the otable size is
178 * determined at compile-time, so this BUG shouldn't trigger
179 * randomly.
180 */
181 BUG_ON(mob->pt_level == VMW_MOBFMT_PTDEPTH_2);
182
183 vmw_cmd_commit(dev_priv, sizeof(*cmd));
184 otable->page_table = mob;
185
186 return 0;
187
188 out_no_fifo:
189 out_no_populate:
190 vmw_mob_destroy(mob);
191 return ret;
192 }
193
194 /*
195 * vmw_takedown_otable_base - Issue an object table base takedown command
196 * to the device
197 *
198 * @dev_priv: Pointer to a device private structure
199 * @type: Type of object table base
200 *
201 */
vmw_takedown_otable_base(struct vmw_private * dev_priv,SVGAOTableType type,struct vmw_otable * otable)202 static void vmw_takedown_otable_base(struct vmw_private *dev_priv,
203 SVGAOTableType type,
204 struct vmw_otable *otable)
205 {
206 struct {
207 SVGA3dCmdHeader header;
208 SVGA3dCmdSetOTableBase body;
209 } *cmd;
210 struct ttm_buffer_object *bo;
211
212 if (otable->page_table == NULL)
213 return;
214
215 bo = otable->page_table->pt_bo;
216 cmd = VMW_CMD_RESERVE(dev_priv, sizeof(*cmd));
217 if (unlikely(cmd == NULL))
218 return;
219
220 memset(cmd, 0, sizeof(*cmd));
221 cmd->header.id = SVGA_3D_CMD_SET_OTABLE_BASE;
222 cmd->header.size = sizeof(cmd->body);
223 cmd->body.type = type;
224 cmd->body.baseAddress = 0;
225 cmd->body.sizeInBytes = 0;
226 cmd->body.validSizeInBytes = 0;
227 cmd->body.ptDepth = SVGA3D_MOBFMT_INVALID;
228 vmw_cmd_commit(dev_priv, sizeof(*cmd));
229
230 if (bo) {
231 int ret;
232
233 ret = ttm_bo_reserve(bo, false, true, NULL);
234 BUG_ON(ret != 0);
235
236 vmw_bo_fence_single(bo, NULL);
237 ttm_bo_unreserve(bo);
238 }
239
240 vmw_mob_destroy(otable->page_table);
241 otable->page_table = NULL;
242 }
243
244
vmw_otable_batch_setup(struct vmw_private * dev_priv,struct vmw_otable_batch * batch)245 static int vmw_otable_batch_setup(struct vmw_private *dev_priv,
246 struct vmw_otable_batch *batch)
247 {
248 unsigned long offset;
249 unsigned long bo_size;
250 struct vmw_otable *otables = batch->otables;
251 SVGAOTableType i;
252 int ret;
253
254 bo_size = 0;
255 for (i = 0; i < batch->num_otables; ++i) {
256 if (!otables[i].enabled)
257 continue;
258
259 otables[i].size = PFN_ALIGN(otables[i].size);
260 bo_size += otables[i].size;
261 }
262
263 ret = vmw_bo_create_and_populate(dev_priv, bo_size, &batch->otable_bo);
264 if (unlikely(ret != 0))
265 return ret;
266
267 offset = 0;
268 for (i = 0; i < batch->num_otables; ++i) {
269 if (!batch->otables[i].enabled)
270 continue;
271
272 ret = vmw_setup_otable_base(dev_priv, i, batch->otable_bo,
273 offset,
274 &otables[i]);
275 if (unlikely(ret != 0))
276 goto out_no_setup;
277 offset += otables[i].size;
278 }
279
280 return 0;
281
282 out_no_setup:
283 for (i = 0; i < batch->num_otables; ++i) {
284 if (batch->otables[i].enabled)
285 vmw_takedown_otable_base(dev_priv, i,
286 &batch->otables[i]);
287 }
288
289 vmw_bo_unpin_unlocked(batch->otable_bo);
290 ttm_bo_put(batch->otable_bo);
291 batch->otable_bo = NULL;
292 return ret;
293 }
294
295 /*
296 * vmw_otables_setup - Set up guest backed memory object tables
297 *
298 * @dev_priv: Pointer to a device private structure
299 *
300 * Takes care of the device guest backed surface
301 * initialization, by setting up the guest backed memory object tables.
302 * Returns 0 on success and various error codes on failure. A successful return
303 * means the object tables can be taken down using the vmw_otables_takedown
304 * function.
305 */
vmw_otables_setup(struct vmw_private * dev_priv)306 int vmw_otables_setup(struct vmw_private *dev_priv)
307 {
308 struct vmw_otable **otables = &dev_priv->otable_batch.otables;
309 int ret;
310
311 if (has_sm4_context(dev_priv)) {
312 *otables = kmemdup(dx_tables, sizeof(dx_tables), GFP_KERNEL);
313 if (!(*otables))
314 return -ENOMEM;
315
316 dev_priv->otable_batch.num_otables = ARRAY_SIZE(dx_tables);
317 } else {
318 *otables = kmemdup(pre_dx_tables, sizeof(pre_dx_tables),
319 GFP_KERNEL);
320 if (!(*otables))
321 return -ENOMEM;
322
323 dev_priv->otable_batch.num_otables = ARRAY_SIZE(pre_dx_tables);
324 }
325
326 ret = vmw_otable_batch_setup(dev_priv, &dev_priv->otable_batch);
327 if (unlikely(ret != 0))
328 goto out_setup;
329
330 return 0;
331
332 out_setup:
333 kfree(*otables);
334 return ret;
335 }
336
vmw_otable_batch_takedown(struct vmw_private * dev_priv,struct vmw_otable_batch * batch)337 static void vmw_otable_batch_takedown(struct vmw_private *dev_priv,
338 struct vmw_otable_batch *batch)
339 {
340 SVGAOTableType i;
341 struct ttm_buffer_object *bo = batch->otable_bo;
342 int ret;
343
344 for (i = 0; i < batch->num_otables; ++i)
345 if (batch->otables[i].enabled)
346 vmw_takedown_otable_base(dev_priv, i,
347 &batch->otables[i]);
348
349 ret = ttm_bo_reserve(bo, false, true, NULL);
350 BUG_ON(ret != 0);
351
352 vmw_bo_fence_single(bo, NULL);
353 ttm_bo_unpin(bo);
354 ttm_bo_unreserve(bo);
355
356 ttm_bo_put(batch->otable_bo);
357 batch->otable_bo = NULL;
358 }
359
360 /*
361 * vmw_otables_takedown - Take down guest backed memory object tables
362 *
363 * @dev_priv: Pointer to a device private structure
364 *
365 * Take down the Guest Memory Object tables.
366 */
vmw_otables_takedown(struct vmw_private * dev_priv)367 void vmw_otables_takedown(struct vmw_private *dev_priv)
368 {
369 vmw_otable_batch_takedown(dev_priv, &dev_priv->otable_batch);
370 kfree(dev_priv->otable_batch.otables);
371 }
372
373 /*
374 * vmw_mob_calculate_pt_pages - Calculate the number of page table pages
375 * needed for a guest backed memory object.
376 *
377 * @data_pages: Number of data pages in the memory object buffer.
378 */
vmw_mob_calculate_pt_pages(unsigned long data_pages)379 static unsigned long vmw_mob_calculate_pt_pages(unsigned long data_pages)
380 {
381 unsigned long data_size = data_pages * PAGE_SIZE;
382 unsigned long tot_size = 0;
383
384 while (likely(data_size > PAGE_SIZE)) {
385 data_size = DIV_ROUND_UP(data_size, PAGE_SIZE);
386 data_size *= VMW_PPN_SIZE;
387 tot_size += PFN_ALIGN(data_size);
388 }
389
390 return tot_size >> PAGE_SHIFT;
391 }
392
393 /*
394 * vmw_mob_create - Create a mob, but don't populate it.
395 *
396 * @data_pages: Number of data pages of the underlying buffer object.
397 */
vmw_mob_create(unsigned long data_pages)398 struct vmw_mob *vmw_mob_create(unsigned long data_pages)
399 {
400 struct vmw_mob *mob = kzalloc(sizeof(*mob), GFP_KERNEL);
401
402 if (unlikely(!mob))
403 return NULL;
404
405 mob->num_pages = vmw_mob_calculate_pt_pages(data_pages);
406
407 return mob;
408 }
409
410 /*
411 * vmw_mob_pt_populate - Populate the mob pagetable
412 *
413 * @mob: Pointer to the mob the pagetable of which we want to
414 * populate.
415 *
416 * This function allocates memory to be used for the pagetable, and
417 * adjusts TTM memory accounting accordingly. Returns ENOMEM if
418 * memory resources aren't sufficient and may cause TTM buffer objects
419 * to be swapped out by using the TTM memory accounting function.
420 */
vmw_mob_pt_populate(struct vmw_private * dev_priv,struct vmw_mob * mob)421 static int vmw_mob_pt_populate(struct vmw_private *dev_priv,
422 struct vmw_mob *mob)
423 {
424 BUG_ON(mob->pt_bo != NULL);
425
426 return vmw_bo_create_and_populate(dev_priv, mob->num_pages * PAGE_SIZE, &mob->pt_bo);
427 }
428
429 /**
430 * vmw_mob_assign_ppn - Assign a value to a page table entry
431 *
432 * @addr: Pointer to pointer to page table entry.
433 * @val: The page table entry
434 *
435 * Assigns a value to a page table entry pointed to by *@addr and increments
436 * *@addr according to the page table entry size.
437 */
438 #if (VMW_PPN_SIZE == 8)
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 *((u64 *) *addr) = val >> PAGE_SHIFT;
442 *addr += 2;
443 }
444 #else
vmw_mob_assign_ppn(u32 ** addr,dma_addr_t val)445 static void vmw_mob_assign_ppn(u32 **addr, dma_addr_t val)
446 {
447 *(*addr)++ = val >> PAGE_SHIFT;
448 }
449 #endif
450
451 /*
452 * vmw_mob_build_pt - Build a pagetable
453 *
454 * @data_addr: Array of DMA addresses to the underlying buffer
455 * object's data pages.
456 * @num_data_pages: Number of buffer object data pages.
457 * @pt_pages: Array of page pointers to the page table pages.
458 *
459 * Returns the number of page table pages actually used.
460 * Uses atomic kmaps of highmem pages to avoid TLB thrashing.
461 */
vmw_mob_build_pt(struct vmw_piter * data_iter,unsigned long num_data_pages,struct vmw_piter * pt_iter)462 static unsigned long vmw_mob_build_pt(struct vmw_piter *data_iter,
463 unsigned long num_data_pages,
464 struct vmw_piter *pt_iter)
465 {
466 unsigned long pt_size = num_data_pages * VMW_PPN_SIZE;
467 unsigned long num_pt_pages = DIV_ROUND_UP(pt_size, PAGE_SIZE);
468 unsigned long pt_page;
469 u32 *addr, *save_addr;
470 unsigned long i;
471 struct page *page;
472
473 for (pt_page = 0; pt_page < num_pt_pages; ++pt_page) {
474 page = vmw_piter_page(pt_iter);
475
476 save_addr = addr = kmap_atomic(page);
477
478 for (i = 0; i < PAGE_SIZE / VMW_PPN_SIZE; ++i) {
479 vmw_mob_assign_ppn(&addr,
480 vmw_piter_dma_addr(data_iter));
481 if (unlikely(--num_data_pages == 0))
482 break;
483 WARN_ON(!vmw_piter_next(data_iter));
484 }
485 kunmap_atomic(save_addr);
486 vmw_piter_next(pt_iter);
487 }
488
489 return num_pt_pages;
490 }
491
492 /*
493 * vmw_mob_build_pt - Set up a multilevel mob pagetable
494 *
495 * @mob: Pointer to a mob whose page table needs setting up.
496 * @data_addr Array of DMA addresses to the buffer object's data
497 * pages.
498 * @num_data_pages: Number of buffer object data pages.
499 *
500 * Uses tail recursion to set up a multilevel mob page table.
501 */
vmw_mob_pt_setup(struct vmw_mob * mob,struct vmw_piter data_iter,unsigned long num_data_pages)502 static void vmw_mob_pt_setup(struct vmw_mob *mob,
503 struct vmw_piter data_iter,
504 unsigned long num_data_pages)
505 {
506 unsigned long num_pt_pages = 0;
507 struct ttm_buffer_object *bo = mob->pt_bo;
508 struct vmw_piter save_pt_iter = {0};
509 struct vmw_piter pt_iter;
510 const struct vmw_sg_table *vsgt;
511 int ret;
512
513 BUG_ON(num_data_pages == 0);
514
515 ret = ttm_bo_reserve(bo, false, true, NULL);
516 BUG_ON(ret != 0);
517
518 vsgt = vmw_bo_sg_table(bo);
519 vmw_piter_start(&pt_iter, vsgt, 0);
520 BUG_ON(!vmw_piter_next(&pt_iter));
521 mob->pt_level = 0;
522 while (likely(num_data_pages > 1)) {
523 ++mob->pt_level;
524 BUG_ON(mob->pt_level > 2);
525 save_pt_iter = pt_iter;
526 num_pt_pages = vmw_mob_build_pt(&data_iter, num_data_pages,
527 &pt_iter);
528 data_iter = save_pt_iter;
529 num_data_pages = num_pt_pages;
530 }
531
532 mob->pt_root_page = vmw_piter_dma_addr(&save_pt_iter);
533 ttm_bo_unreserve(bo);
534 }
535
536 /*
537 * vmw_mob_destroy - Destroy a mob, unpopulating first if necessary.
538 *
539 * @mob: Pointer to a mob to destroy.
540 */
vmw_mob_destroy(struct vmw_mob * mob)541 void vmw_mob_destroy(struct vmw_mob *mob)
542 {
543 if (mob->pt_bo) {
544 vmw_bo_unpin_unlocked(mob->pt_bo);
545 ttm_bo_put(mob->pt_bo);
546 mob->pt_bo = NULL;
547 }
548 kfree(mob);
549 }
550
551 /*
552 * vmw_mob_unbind - Hide a mob from the device.
553 *
554 * @dev_priv: Pointer to a device private.
555 * @mob_id: Device id of the mob to unbind.
556 */
vmw_mob_unbind(struct vmw_private * dev_priv,struct vmw_mob * mob)557 void vmw_mob_unbind(struct vmw_private *dev_priv,
558 struct vmw_mob *mob)
559 {
560 struct {
561 SVGA3dCmdHeader header;
562 SVGA3dCmdDestroyGBMob body;
563 } *cmd;
564 int ret;
565 struct ttm_buffer_object *bo = mob->pt_bo;
566
567 if (bo) {
568 ret = ttm_bo_reserve(bo, false, true, NULL);
569 /*
570 * Noone else should be using this buffer.
571 */
572 BUG_ON(ret != 0);
573 }
574
575 cmd = VMW_CMD_RESERVE(dev_priv, sizeof(*cmd));
576 if (cmd) {
577 cmd->header.id = SVGA_3D_CMD_DESTROY_GB_MOB;
578 cmd->header.size = sizeof(cmd->body);
579 cmd->body.mobid = mob->id;
580 vmw_cmd_commit(dev_priv, sizeof(*cmd));
581 }
582
583 if (bo) {
584 vmw_bo_fence_single(bo, NULL);
585 ttm_bo_unreserve(bo);
586 }
587 vmw_fifo_resource_dec(dev_priv);
588 }
589
590 /*
591 * vmw_mob_bind - Make a mob visible to the device after first
592 * populating it if necessary.
593 *
594 * @dev_priv: Pointer to a device private.
595 * @mob: Pointer to the mob we're making visible.
596 * @data_addr: Array of DMA addresses to the data pages of the underlying
597 * buffer object.
598 * @num_data_pages: Number of data pages of the underlying buffer
599 * object.
600 * @mob_id: Device id of the mob to bind
601 *
602 * This function is intended to be interfaced with the ttm_tt backend
603 * code.
604 */
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)605 int vmw_mob_bind(struct vmw_private *dev_priv,
606 struct vmw_mob *mob,
607 const struct vmw_sg_table *vsgt,
608 unsigned long num_data_pages,
609 int32_t mob_id)
610 {
611 int ret;
612 bool pt_set_up = false;
613 struct vmw_piter data_iter;
614 struct {
615 SVGA3dCmdHeader header;
616 SVGA3dCmdDefineGBMob64 body;
617 } *cmd;
618
619 mob->id = mob_id;
620 vmw_piter_start(&data_iter, vsgt, 0);
621 if (unlikely(!vmw_piter_next(&data_iter)))
622 return 0;
623
624 if (likely(num_data_pages == 1)) {
625 mob->pt_level = VMW_MOBFMT_PTDEPTH_0;
626 mob->pt_root_page = vmw_piter_dma_addr(&data_iter);
627 } else if (vsgt->num_regions == 1) {
628 mob->pt_level = SVGA3D_MOBFMT_RANGE;
629 mob->pt_root_page = vmw_piter_dma_addr(&data_iter);
630 } else if (unlikely(mob->pt_bo == NULL)) {
631 ret = vmw_mob_pt_populate(dev_priv, mob);
632 if (unlikely(ret != 0))
633 return ret;
634
635 vmw_mob_pt_setup(mob, data_iter, num_data_pages);
636 pt_set_up = true;
637 mob->pt_level += VMW_MOBFMT_PTDEPTH_1 - SVGA3D_MOBFMT_PT_1;
638 }
639
640 vmw_fifo_resource_inc(dev_priv);
641
642 cmd = VMW_CMD_RESERVE(dev_priv, sizeof(*cmd));
643 if (unlikely(cmd == NULL))
644 goto out_no_cmd_space;
645
646 cmd->header.id = SVGA_3D_CMD_DEFINE_GB_MOB64;
647 cmd->header.size = sizeof(cmd->body);
648 cmd->body.mobid = mob_id;
649 cmd->body.ptDepth = mob->pt_level;
650 cmd->body.base = mob->pt_root_page >> PAGE_SHIFT;
651 cmd->body.sizeInBytes = num_data_pages * PAGE_SIZE;
652
653 vmw_cmd_commit(dev_priv, sizeof(*cmd));
654
655 return 0;
656
657 out_no_cmd_space:
658 vmw_fifo_resource_dec(dev_priv);
659 if (pt_set_up) {
660 vmw_bo_unpin_unlocked(mob->pt_bo);
661 ttm_bo_put(mob->pt_bo);
662 mob->pt_bo = NULL;
663 }
664
665 return -ENOMEM;
666 }
667
