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1// SPDX-License-Identifier: GPL-2.0 OR MIT
2/**************************************************************************
3 *
4 * Copyright 2009-2015 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#include <drm/ttm/ttm_bo_driver.h>
30#include <drm/ttm/ttm_placement.h>
31#include <drm/ttm/ttm_page_alloc.h>
32
33static const struct ttm_place vram_placement_flags = {
34 .fpfn = 0,
35 .lpfn = 0,
36 .flags = TTM_PL_FLAG_VRAM | TTM_PL_FLAG_CACHED
37};
38
39static const struct ttm_place vram_ne_placement_flags = {
40 .fpfn = 0,
41 .lpfn = 0,
42 .flags = TTM_PL_FLAG_VRAM | TTM_PL_FLAG_CACHED | TTM_PL_FLAG_NO_EVICT
43};
44
45static const struct ttm_place sys_placement_flags = {
46 .fpfn = 0,
47 .lpfn = 0,
48 .flags = TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED
49};
50
51static const struct ttm_place sys_ne_placement_flags = {
52 .fpfn = 0,
53 .lpfn = 0,
54 .flags = TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED | TTM_PL_FLAG_NO_EVICT
55};
56
57static const struct ttm_place gmr_placement_flags = {
58 .fpfn = 0,
59 .lpfn = 0,
60 .flags = VMW_PL_FLAG_GMR | TTM_PL_FLAG_CACHED
61};
62
63static const struct ttm_place gmr_ne_placement_flags = {
64 .fpfn = 0,
65 .lpfn = 0,
66 .flags = VMW_PL_FLAG_GMR | TTM_PL_FLAG_CACHED | TTM_PL_FLAG_NO_EVICT
67};
68
69static const struct ttm_place mob_placement_flags = {
70 .fpfn = 0,
71 .lpfn = 0,
72 .flags = VMW_PL_FLAG_MOB | TTM_PL_FLAG_CACHED
73};
74
75static const struct ttm_place mob_ne_placement_flags = {
76 .fpfn = 0,
77 .lpfn = 0,
78 .flags = VMW_PL_FLAG_MOB | TTM_PL_FLAG_CACHED | TTM_PL_FLAG_NO_EVICT
79};
80
81struct ttm_placement vmw_vram_placement = {
82 .num_placement = 1,
83 .placement = &vram_placement_flags,
84 .num_busy_placement = 1,
85 .busy_placement = &vram_placement_flags
86};
87
88static const struct ttm_place vram_gmr_placement_flags[] = {
89 {
90 .fpfn = 0,
91 .lpfn = 0,
92 .flags = TTM_PL_FLAG_VRAM | TTM_PL_FLAG_CACHED
93 }, {
94 .fpfn = 0,
95 .lpfn = 0,
96 .flags = VMW_PL_FLAG_GMR | TTM_PL_FLAG_CACHED
97 }
98};
99
100static const struct ttm_place gmr_vram_placement_flags[] = {
101 {
102 .fpfn = 0,
103 .lpfn = 0,
104 .flags = VMW_PL_FLAG_GMR | TTM_PL_FLAG_CACHED
105 }, {
106 .fpfn = 0,
107 .lpfn = 0,
108 .flags = TTM_PL_FLAG_VRAM | TTM_PL_FLAG_CACHED
109 }
110};
111
112struct ttm_placement vmw_vram_gmr_placement = {
113 .num_placement = 2,
114 .placement = vram_gmr_placement_flags,
115 .num_busy_placement = 1,
116 .busy_placement = &gmr_placement_flags
117};
118
119static const struct ttm_place vram_gmr_ne_placement_flags[] = {
120 {
121 .fpfn = 0,
122 .lpfn = 0,
123 .flags = TTM_PL_FLAG_VRAM | TTM_PL_FLAG_CACHED |
124 TTM_PL_FLAG_NO_EVICT
125 }, {
126 .fpfn = 0,
127 .lpfn = 0,
128 .flags = VMW_PL_FLAG_GMR | TTM_PL_FLAG_CACHED |
129 TTM_PL_FLAG_NO_EVICT
130 }
131};
132
133struct ttm_placement vmw_vram_gmr_ne_placement = {
134 .num_placement = 2,
135 .placement = vram_gmr_ne_placement_flags,
136 .num_busy_placement = 1,
137 .busy_placement = &gmr_ne_placement_flags
138};
139
140struct ttm_placement vmw_vram_sys_placement = {
141 .num_placement = 1,
142 .placement = &vram_placement_flags,
143 .num_busy_placement = 1,
144 .busy_placement = &sys_placement_flags
145};
146
147struct ttm_placement vmw_vram_ne_placement = {
148 .num_placement = 1,
149 .placement = &vram_ne_placement_flags,
150 .num_busy_placement = 1,
151 .busy_placement = &vram_ne_placement_flags
152};
153
154struct ttm_placement vmw_sys_placement = {
155 .num_placement = 1,
156 .placement = &sys_placement_flags,
157 .num_busy_placement = 1,
158 .busy_placement = &sys_placement_flags
159};
160
161struct ttm_placement vmw_sys_ne_placement = {
162 .num_placement = 1,
163 .placement = &sys_ne_placement_flags,
164 .num_busy_placement = 1,
165 .busy_placement = &sys_ne_placement_flags
166};
167
168static const struct ttm_place evictable_placement_flags[] = {
169 {
170 .fpfn = 0,
171 .lpfn = 0,
172 .flags = TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED
173 }, {
174 .fpfn = 0,
175 .lpfn = 0,
176 .flags = TTM_PL_FLAG_VRAM | TTM_PL_FLAG_CACHED
177 }, {
178 .fpfn = 0,
179 .lpfn = 0,
180 .flags = VMW_PL_FLAG_GMR | TTM_PL_FLAG_CACHED
181 }, {
182 .fpfn = 0,
183 .lpfn = 0,
184 .flags = VMW_PL_FLAG_MOB | TTM_PL_FLAG_CACHED
185 }
186};
187
188static const struct ttm_place nonfixed_placement_flags[] = {
189 {
190 .fpfn = 0,
191 .lpfn = 0,
192 .flags = TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED
193 }, {
194 .fpfn = 0,
195 .lpfn = 0,
196 .flags = VMW_PL_FLAG_GMR | TTM_PL_FLAG_CACHED
197 }, {
198 .fpfn = 0,
199 .lpfn = 0,
200 .flags = VMW_PL_FLAG_MOB | TTM_PL_FLAG_CACHED
201 }
202};
203
204struct ttm_placement vmw_evictable_placement = {
205 .num_placement = 4,
206 .placement = evictable_placement_flags,
207 .num_busy_placement = 1,
208 .busy_placement = &sys_placement_flags
209};
210
211struct ttm_placement vmw_srf_placement = {
212 .num_placement = 1,
213 .num_busy_placement = 2,
214 .placement = &gmr_placement_flags,
215 .busy_placement = gmr_vram_placement_flags
216};
217
218struct ttm_placement vmw_mob_placement = {
219 .num_placement = 1,
220 .num_busy_placement = 1,
221 .placement = &mob_placement_flags,
222 .busy_placement = &mob_placement_flags
223};
224
225struct ttm_placement vmw_mob_ne_placement = {
226 .num_placement = 1,
227 .num_busy_placement = 1,
228 .placement = &mob_ne_placement_flags,
229 .busy_placement = &mob_ne_placement_flags
230};
231
232struct ttm_placement vmw_nonfixed_placement = {
233 .num_placement = 3,
234 .placement = nonfixed_placement_flags,
235 .num_busy_placement = 1,
236 .busy_placement = &sys_placement_flags
237};
238
239struct vmw_ttm_tt {
240 struct ttm_dma_tt dma_ttm;
241 struct vmw_private *dev_priv;
242 int gmr_id;
243 struct vmw_mob *mob;
244 int mem_type;
245 struct sg_table sgt;
246 struct vmw_sg_table vsgt;
247 uint64_t sg_alloc_size;
248 bool mapped;
249};
250
251const size_t vmw_tt_size = sizeof(struct vmw_ttm_tt);
252
253/**
254 * Helper functions to advance a struct vmw_piter iterator.
255 *
256 * @viter: Pointer to the iterator.
257 *
258 * These functions return false if past the end of the list,
259 * true otherwise. Functions are selected depending on the current
260 * DMA mapping mode.
261 */
262static bool __vmw_piter_non_sg_next(struct vmw_piter *viter)
263{
264 return ++(viter->i) < viter->num_pages;
265}
266
267static bool __vmw_piter_sg_next(struct vmw_piter *viter)
268{
269 bool ret = __vmw_piter_non_sg_next(viter);
270
271 return __sg_page_iter_dma_next(&viter->iter) && ret;
272}
273
274
275/**
276 * Helper functions to return a pointer to the current page.
277 *
278 * @viter: Pointer to the iterator
279 *
280 * These functions return a pointer to the page currently
281 * pointed to by @viter. Functions are selected depending on the
282 * current mapping mode.
283 */
284static struct page *__vmw_piter_non_sg_page(struct vmw_piter *viter)
285{
286 return viter->pages[viter->i];
287}
288
289/**
290 * Helper functions to return the DMA address of the current page.
291 *
292 * @viter: Pointer to the iterator
293 *
294 * These functions return the DMA address of the page currently
295 * pointed to by @viter. Functions are selected depending on the
296 * current mapping mode.
297 */
298static dma_addr_t __vmw_piter_phys_addr(struct vmw_piter *viter)
299{
300 return page_to_phys(viter->pages[viter->i]);
301}
302
303static dma_addr_t __vmw_piter_dma_addr(struct vmw_piter *viter)
304{
305 return viter->addrs[viter->i];
306}
307
308static dma_addr_t __vmw_piter_sg_addr(struct vmw_piter *viter)
309{
310 return sg_page_iter_dma_address(&viter->iter);
311}
312
313
314/**
315 * vmw_piter_start - Initialize a struct vmw_piter.
316 *
317 * @viter: Pointer to the iterator to initialize
318 * @vsgt: Pointer to a struct vmw_sg_table to initialize from
319 *
320 * Note that we're following the convention of __sg_page_iter_start, so that
321 * the iterator doesn't point to a valid page after initialization; it has
322 * to be advanced one step first.
323 */
324void vmw_piter_start(struct vmw_piter *viter, const struct vmw_sg_table *vsgt,
325 unsigned long p_offset)
326{
327 viter->i = p_offset - 1;
328 viter->num_pages = vsgt->num_pages;
329 viter->page = &__vmw_piter_non_sg_page;
330 viter->pages = vsgt->pages;
331 switch (vsgt->mode) {
332 case vmw_dma_phys:
333 viter->next = &__vmw_piter_non_sg_next;
334 viter->dma_address = &__vmw_piter_phys_addr;
335 break;
336 case vmw_dma_alloc_coherent:
337 viter->next = &__vmw_piter_non_sg_next;
338 viter->dma_address = &__vmw_piter_dma_addr;
339 viter->addrs = vsgt->addrs;
340 break;
341 case vmw_dma_map_populate:
342 case vmw_dma_map_bind:
343 viter->next = &__vmw_piter_sg_next;
344 viter->dma_address = &__vmw_piter_sg_addr;
345 __sg_page_iter_start(&viter->iter.base, vsgt->sgt->sgl,
346 vsgt->sgt->orig_nents, p_offset);
347 break;
348 default:
349 BUG();
350 }
351}
352
353/**
354 * vmw_ttm_unmap_from_dma - unmap device addresses previsouly mapped for
355 * TTM pages
356 *
357 * @vmw_tt: Pointer to a struct vmw_ttm_backend
358 *
359 * Used to free dma mappings previously mapped by vmw_ttm_map_for_dma.
360 */
361static void vmw_ttm_unmap_from_dma(struct vmw_ttm_tt *vmw_tt)
362{
363 struct device *dev = vmw_tt->dev_priv->dev->dev;
364
365 dma_unmap_sg(dev, vmw_tt->sgt.sgl, vmw_tt->sgt.nents,
366 DMA_BIDIRECTIONAL);
367 vmw_tt->sgt.nents = vmw_tt->sgt.orig_nents;
368}
369
370/**
371 * vmw_ttm_map_for_dma - map TTM pages to get device addresses
372 *
373 * @vmw_tt: Pointer to a struct vmw_ttm_backend
374 *
375 * This function is used to get device addresses from the kernel DMA layer.
376 * However, it's violating the DMA API in that when this operation has been
377 * performed, it's illegal for the CPU to write to the pages without first
378 * unmapping the DMA mappings, or calling dma_sync_sg_for_cpu(). It is
379 * therefore only legal to call this function if we know that the function
380 * dma_sync_sg_for_cpu() is a NOP, and dma_sync_sg_for_device() is at most
381 * a CPU write buffer flush.
382 */
383static int vmw_ttm_map_for_dma(struct vmw_ttm_tt *vmw_tt)
384{
385 struct device *dev = vmw_tt->dev_priv->dev->dev;
386 int ret;
387
388 ret = dma_map_sg(dev, vmw_tt->sgt.sgl, vmw_tt->sgt.orig_nents,
389 DMA_BIDIRECTIONAL);
390 if (unlikely(ret == 0))
391 return -ENOMEM;
392
393 vmw_tt->sgt.nents = ret;
394
395 return 0;
396}
397
398/**
399 * vmw_ttm_map_dma - Make sure TTM pages are visible to the device
400 *
401 * @vmw_tt: Pointer to a struct vmw_ttm_tt
402 *
403 * Select the correct function for and make sure the TTM pages are
404 * visible to the device. Allocate storage for the device mappings.
405 * If a mapping has already been performed, indicated by the storage
406 * pointer being non NULL, the function returns success.
407 */
408static int vmw_ttm_map_dma(struct vmw_ttm_tt *vmw_tt)
409{
410 struct vmw_private *dev_priv = vmw_tt->dev_priv;
411 struct ttm_mem_global *glob = vmw_mem_glob(dev_priv);
412 struct vmw_sg_table *vsgt = &vmw_tt->vsgt;
413 struct ttm_operation_ctx ctx = {
414 .interruptible = true,
415 .no_wait_gpu = false
416 };
417 struct vmw_piter iter;
418 dma_addr_t old;
419 int ret = 0;
420 static size_t sgl_size;
421 static size_t sgt_size;
422
423 if (vmw_tt->mapped)
424 return 0;
425
426 vsgt->mode = dev_priv->map_mode;
427 vsgt->pages = vmw_tt->dma_ttm.ttm.pages;
428 vsgt->num_pages = vmw_tt->dma_ttm.ttm.num_pages;
429 vsgt->addrs = vmw_tt->dma_ttm.dma_address;
430 vsgt->sgt = &vmw_tt->sgt;
431
432 switch (dev_priv->map_mode) {
433 case vmw_dma_map_bind:
434 case vmw_dma_map_populate:
435 if (unlikely(!sgl_size)) {
436 sgl_size = ttm_round_pot(sizeof(struct scatterlist));
437 sgt_size = ttm_round_pot(sizeof(struct sg_table));
438 }
439 vmw_tt->sg_alloc_size = sgt_size + sgl_size * vsgt->num_pages;
440 ret = ttm_mem_global_alloc(glob, vmw_tt->sg_alloc_size, &ctx);
441 if (unlikely(ret != 0))
442 return ret;
443
444 ret = __sg_alloc_table_from_pages
445 (&vmw_tt->sgt, vsgt->pages, vsgt->num_pages, 0,
446 (unsigned long) vsgt->num_pages << PAGE_SHIFT,
447 dma_get_max_seg_size(dev_priv->dev->dev),
448 GFP_KERNEL);
449 if (unlikely(ret != 0))
450 goto out_sg_alloc_fail;
451
452 if (vsgt->num_pages > vmw_tt->sgt.nents) {
453 uint64_t over_alloc =
454 sgl_size * (vsgt->num_pages -
455 vmw_tt->sgt.nents);
456
457 ttm_mem_global_free(glob, over_alloc);
458 vmw_tt->sg_alloc_size -= over_alloc;
459 }
460
461 ret = vmw_ttm_map_for_dma(vmw_tt);
462 if (unlikely(ret != 0))
463 goto out_map_fail;
464
465 break;
466 default:
467 break;
468 }
469
470 old = ~((dma_addr_t) 0);
471 vmw_tt->vsgt.num_regions = 0;
472 for (vmw_piter_start(&iter, vsgt, 0); vmw_piter_next(&iter);) {
473 dma_addr_t cur = vmw_piter_dma_addr(&iter);
474
475 if (cur != old + PAGE_SIZE)
476 vmw_tt->vsgt.num_regions++;
477 old = cur;
478 }
479
480 vmw_tt->mapped = true;
481 return 0;
482
483out_map_fail:
484 sg_free_table(vmw_tt->vsgt.sgt);
485 vmw_tt->vsgt.sgt = NULL;
486out_sg_alloc_fail:
487 ttm_mem_global_free(glob, vmw_tt->sg_alloc_size);
488 return ret;
489}
490
491/**
492 * vmw_ttm_unmap_dma - Tear down any TTM page device mappings
493 *
494 * @vmw_tt: Pointer to a struct vmw_ttm_tt
495 *
496 * Tear down any previously set up device DMA mappings and free
497 * any storage space allocated for them. If there are no mappings set up,
498 * this function is a NOP.
499 */
500static void vmw_ttm_unmap_dma(struct vmw_ttm_tt *vmw_tt)
501{
502 struct vmw_private *dev_priv = vmw_tt->dev_priv;
503
504 if (!vmw_tt->vsgt.sgt)
505 return;
506
507 switch (dev_priv->map_mode) {
508 case vmw_dma_map_bind:
509 case vmw_dma_map_populate:
510 vmw_ttm_unmap_from_dma(vmw_tt);
511 sg_free_table(vmw_tt->vsgt.sgt);
512 vmw_tt->vsgt.sgt = NULL;
513 ttm_mem_global_free(vmw_mem_glob(dev_priv),
514 vmw_tt->sg_alloc_size);
515 break;
516 default:
517 break;
518 }
519 vmw_tt->mapped = false;
520}
521
522
523/**
524 * vmw_bo_map_dma - Make sure buffer object pages are visible to the device
525 *
526 * @bo: Pointer to a struct ttm_buffer_object
527 *
528 * Wrapper around vmw_ttm_map_dma, that takes a TTM buffer object pointer
529 * instead of a pointer to a struct vmw_ttm_backend as argument.
530 * Note that the buffer object must be either pinned or reserved before
531 * calling this function.
532 */
533int vmw_bo_map_dma(struct ttm_buffer_object *bo)
534{
535 struct vmw_ttm_tt *vmw_tt =
536 container_of(bo->ttm, struct vmw_ttm_tt, dma_ttm.ttm);
537
538 return vmw_ttm_map_dma(vmw_tt);
539}
540
541
542/**
543 * vmw_bo_unmap_dma - Make sure buffer object pages are visible to the device
544 *
545 * @bo: Pointer to a struct ttm_buffer_object
546 *
547 * Wrapper around vmw_ttm_unmap_dma, that takes a TTM buffer object pointer
548 * instead of a pointer to a struct vmw_ttm_backend as argument.
549 */
550void vmw_bo_unmap_dma(struct ttm_buffer_object *bo)
551{
552 struct vmw_ttm_tt *vmw_tt =
553 container_of(bo->ttm, struct vmw_ttm_tt, dma_ttm.ttm);
554
555 vmw_ttm_unmap_dma(vmw_tt);
556}
557
558
559/**
560 * vmw_bo_sg_table - Return a struct vmw_sg_table object for a
561 * TTM buffer object
562 *
563 * @bo: Pointer to a struct ttm_buffer_object
564 *
565 * Returns a pointer to a struct vmw_sg_table object. The object should
566 * not be freed after use.
567 * Note that for the device addresses to be valid, the buffer object must
568 * either be reserved or pinned.
569 */
570const struct vmw_sg_table *vmw_bo_sg_table(struct ttm_buffer_object *bo)
571{
572 struct vmw_ttm_tt *vmw_tt =
573 container_of(bo->ttm, struct vmw_ttm_tt, dma_ttm.ttm);
574
575 return &vmw_tt->vsgt;
576}
577
578
579static int vmw_ttm_bind(struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem)
580{
581 struct vmw_ttm_tt *vmw_be =
582 container_of(ttm, struct vmw_ttm_tt, dma_ttm.ttm);
583 int ret;
584
585 ret = vmw_ttm_map_dma(vmw_be);
586 if (unlikely(ret != 0))
587 return ret;
588
589 vmw_be->gmr_id = bo_mem->start;
590 vmw_be->mem_type = bo_mem->mem_type;
591
592 switch (bo_mem->mem_type) {
593 case VMW_PL_GMR:
594 return vmw_gmr_bind(vmw_be->dev_priv, &vmw_be->vsgt,
595 ttm->num_pages, vmw_be->gmr_id);
596 case VMW_PL_MOB:
597 if (unlikely(vmw_be->mob == NULL)) {
598 vmw_be->mob =
599 vmw_mob_create(ttm->num_pages);
600 if (unlikely(vmw_be->mob == NULL))
601 return -ENOMEM;
602 }
603
604 return vmw_mob_bind(vmw_be->dev_priv, vmw_be->mob,
605 &vmw_be->vsgt, ttm->num_pages,
606 vmw_be->gmr_id);
607 default:
608 BUG();
609 }
610 return 0;
611}
612
613static int vmw_ttm_unbind(struct ttm_tt *ttm)
614{
615 struct vmw_ttm_tt *vmw_be =
616 container_of(ttm, struct vmw_ttm_tt, dma_ttm.ttm);
617
618 switch (vmw_be->mem_type) {
619 case VMW_PL_GMR:
620 vmw_gmr_unbind(vmw_be->dev_priv, vmw_be->gmr_id);
621 break;
622 case VMW_PL_MOB:
623 vmw_mob_unbind(vmw_be->dev_priv, vmw_be->mob);
624 break;
625 default:
626 BUG();
627 }
628
629 if (vmw_be->dev_priv->map_mode == vmw_dma_map_bind)
630 vmw_ttm_unmap_dma(vmw_be);
631
632 return 0;
633}
634
635
636static void vmw_ttm_destroy(struct ttm_tt *ttm)
637{
638 struct vmw_ttm_tt *vmw_be =
639 container_of(ttm, struct vmw_ttm_tt, dma_ttm.ttm);
640
641 vmw_ttm_unmap_dma(vmw_be);
642 if (vmw_be->dev_priv->map_mode == vmw_dma_alloc_coherent)
643 ttm_dma_tt_fini(&vmw_be->dma_ttm);
644 else
645 ttm_tt_fini(ttm);
646
647 if (vmw_be->mob)
648 vmw_mob_destroy(vmw_be->mob);
649
650 kfree(vmw_be);
651}
652
653
654static int vmw_ttm_populate(struct ttm_tt *ttm, struct ttm_operation_ctx *ctx)
655{
656 struct vmw_ttm_tt *vmw_tt =
657 container_of(ttm, struct vmw_ttm_tt, dma_ttm.ttm);
658 struct vmw_private *dev_priv = vmw_tt->dev_priv;
659 struct ttm_mem_global *glob = vmw_mem_glob(dev_priv);
660 int ret;
661
662 if (ttm->state != tt_unpopulated)
663 return 0;
664
665 if (dev_priv->map_mode == vmw_dma_alloc_coherent) {
666 size_t size =
667 ttm_round_pot(ttm->num_pages * sizeof(dma_addr_t));
668 ret = ttm_mem_global_alloc(glob, size, ctx);
669 if (unlikely(ret != 0))
670 return ret;
671
672 ret = ttm_dma_populate(&vmw_tt->dma_ttm, dev_priv->dev->dev,
673 ctx);
674 if (unlikely(ret != 0))
675 ttm_mem_global_free(glob, size);
676 } else
677 ret = ttm_pool_populate(ttm, ctx);
678
679 return ret;
680}
681
682static void vmw_ttm_unpopulate(struct ttm_tt *ttm)
683{
684 struct vmw_ttm_tt *vmw_tt = container_of(ttm, struct vmw_ttm_tt,
685 dma_ttm.ttm);
686 struct vmw_private *dev_priv = vmw_tt->dev_priv;
687 struct ttm_mem_global *glob = vmw_mem_glob(dev_priv);
688
689
690 if (vmw_tt->mob) {
691 vmw_mob_destroy(vmw_tt->mob);
692 vmw_tt->mob = NULL;
693 }
694
695 vmw_ttm_unmap_dma(vmw_tt);
696 if (dev_priv->map_mode == vmw_dma_alloc_coherent) {
697 size_t size =
698 ttm_round_pot(ttm->num_pages * sizeof(dma_addr_t));
699
700 ttm_dma_unpopulate(&vmw_tt->dma_ttm, dev_priv->dev->dev);
701 ttm_mem_global_free(glob, size);
702 } else
703 ttm_pool_unpopulate(ttm);
704}
705
706static struct ttm_backend_func vmw_ttm_func = {
707 .bind = vmw_ttm_bind,
708 .unbind = vmw_ttm_unbind,
709 .destroy = vmw_ttm_destroy,
710};
711
712static struct ttm_tt *vmw_ttm_tt_create(struct ttm_buffer_object *bo,
713 uint32_t page_flags)
714{
715 struct vmw_ttm_tt *vmw_be;
716 int ret;
717
718 vmw_be = kzalloc(sizeof(*vmw_be), GFP_KERNEL);
719 if (!vmw_be)
720 return NULL;
721
722 vmw_be->dma_ttm.ttm.func = &vmw_ttm_func;
723 vmw_be->dev_priv = container_of(bo->bdev, struct vmw_private, bdev);
724 vmw_be->mob = NULL;
725
726 if (vmw_be->dev_priv->map_mode == vmw_dma_alloc_coherent)
727 ret = ttm_dma_tt_init(&vmw_be->dma_ttm, bo, page_flags);
728 else
729 ret = ttm_tt_init(&vmw_be->dma_ttm.ttm, bo, page_flags);
730 if (unlikely(ret != 0))
731 goto out_no_init;
732
733 return &vmw_be->dma_ttm.ttm;
734out_no_init:
735 kfree(vmw_be);
736 return NULL;
737}
738
739static int vmw_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
740{
741 return 0;
742}
743
744static int vmw_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
745 struct ttm_mem_type_manager *man)
746{
747 switch (type) {
748 case TTM_PL_SYSTEM:
749 /* System memory */
750
751 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
752 man->available_caching = TTM_PL_FLAG_CACHED;
753 man->default_caching = TTM_PL_FLAG_CACHED;
754 break;
755 case TTM_PL_VRAM:
756 /* "On-card" video ram */
757 man->func = &ttm_bo_manager_func;
758 man->gpu_offset = 0;
759 man->flags = TTM_MEMTYPE_FLAG_FIXED | TTM_MEMTYPE_FLAG_MAPPABLE;
760 man->available_caching = TTM_PL_FLAG_CACHED;
761 man->default_caching = TTM_PL_FLAG_CACHED;
762 break;
763 case VMW_PL_GMR:
764 case VMW_PL_MOB:
765 /*
766 * "Guest Memory Regions" is an aperture like feature with
767 * one slot per bo. There is an upper limit of the number of
768 * slots as well as the bo size.
769 */
770 man->func = &vmw_gmrid_manager_func;
771 man->gpu_offset = 0;
772 man->flags = TTM_MEMTYPE_FLAG_CMA | TTM_MEMTYPE_FLAG_MAPPABLE;
773 man->available_caching = TTM_PL_FLAG_CACHED;
774 man->default_caching = TTM_PL_FLAG_CACHED;
775 break;
776 default:
777 DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
778 return -EINVAL;
779 }
780 return 0;
781}
782
783static void vmw_evict_flags(struct ttm_buffer_object *bo,
784 struct ttm_placement *placement)
785{
786 *placement = vmw_sys_placement;
787}
788
789static int vmw_verify_access(struct ttm_buffer_object *bo, struct file *filp)
790{
791 struct ttm_object_file *tfile =
792 vmw_fpriv((struct drm_file *)filp->private_data)->tfile;
793
794 return vmw_user_bo_verify_access(bo, tfile);
795}
796
797static int vmw_ttm_io_mem_reserve(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
798{
799 struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
800 struct vmw_private *dev_priv = container_of(bdev, struct vmw_private, bdev);
801
802 mem->bus.addr = NULL;
803 mem->bus.is_iomem = false;
804 mem->bus.offset = 0;
805 mem->bus.size = mem->num_pages << PAGE_SHIFT;
806 mem->bus.base = 0;
807 if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
808 return -EINVAL;
809 switch (mem->mem_type) {
810 case TTM_PL_SYSTEM:
811 case VMW_PL_GMR:
812 case VMW_PL_MOB:
813 return 0;
814 case TTM_PL_VRAM:
815 mem->bus.offset = mem->start << PAGE_SHIFT;
816 mem->bus.base = dev_priv->vram_start;
817 mem->bus.is_iomem = true;
818 break;
819 default:
820 return -EINVAL;
821 }
822 return 0;
823}
824
825static void vmw_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
826{
827}
828
829static int vmw_ttm_fault_reserve_notify(struct ttm_buffer_object *bo)
830{
831 return 0;
832}
833
834/**
835 * vmw_move_notify - TTM move_notify_callback
836 *
837 * @bo: The TTM buffer object about to move.
838 * @mem: The struct ttm_mem_reg indicating to what memory
839 * region the move is taking place.
840 *
841 * Calls move_notify for all subsystems needing it.
842 * (currently only resources).
843 */
844static void vmw_move_notify(struct ttm_buffer_object *bo,
845 bool evict,
846 struct ttm_mem_reg *mem)
847{
848 vmw_bo_move_notify(bo, mem);
849 vmw_query_move_notify(bo, mem);
850}
851
852
853/**
854 * vmw_swap_notify - TTM move_notify_callback
855 *
856 * @bo: The TTM buffer object about to be swapped out.
857 */
858static void vmw_swap_notify(struct ttm_buffer_object *bo)
859{
860 vmw_bo_swap_notify(bo);
861 (void) ttm_bo_wait(bo, false, false);
862}
863
864
865struct ttm_bo_driver vmw_bo_driver = {
866 .ttm_tt_create = &vmw_ttm_tt_create,
867 .ttm_tt_populate = &vmw_ttm_populate,
868 .ttm_tt_unpopulate = &vmw_ttm_unpopulate,
869 .invalidate_caches = vmw_invalidate_caches,
870 .init_mem_type = vmw_init_mem_type,
871 .eviction_valuable = ttm_bo_eviction_valuable,
872 .evict_flags = vmw_evict_flags,
873 .move = NULL,
874 .verify_access = vmw_verify_access,
875 .move_notify = vmw_move_notify,
876 .swap_notify = vmw_swap_notify,
877 .fault_reserve_notify = &vmw_ttm_fault_reserve_notify,
878 .io_mem_reserve = &vmw_ttm_io_mem_reserve,
879 .io_mem_free = &vmw_ttm_io_mem_free,
880};
1// SPDX-License-Identifier: GPL-2.0 OR MIT
2/**************************************************************************
3 *
4 * Copyright 2009-2015 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#include <drm/ttm/ttm_bo_driver.h>
30#include <drm/ttm/ttm_placement.h>
31
32static const struct ttm_place vram_placement_flags = {
33 .fpfn = 0,
34 .lpfn = 0,
35 .mem_type = TTM_PL_VRAM,
36 .flags = 0
37};
38
39static const struct ttm_place sys_placement_flags = {
40 .fpfn = 0,
41 .lpfn = 0,
42 .mem_type = TTM_PL_SYSTEM,
43 .flags = 0
44};
45
46static const struct ttm_place gmr_placement_flags = {
47 .fpfn = 0,
48 .lpfn = 0,
49 .mem_type = VMW_PL_GMR,
50 .flags = 0
51};
52
53static const struct ttm_place mob_placement_flags = {
54 .fpfn = 0,
55 .lpfn = 0,
56 .mem_type = VMW_PL_MOB,
57 .flags = 0
58};
59
60struct ttm_placement vmw_vram_placement = {
61 .num_placement = 1,
62 .placement = &vram_placement_flags,
63 .num_busy_placement = 1,
64 .busy_placement = &vram_placement_flags
65};
66
67static const struct ttm_place vram_gmr_placement_flags[] = {
68 {
69 .fpfn = 0,
70 .lpfn = 0,
71 .mem_type = TTM_PL_VRAM,
72 .flags = 0
73 }, {
74 .fpfn = 0,
75 .lpfn = 0,
76 .mem_type = VMW_PL_GMR,
77 .flags = 0
78 }
79};
80
81static const struct ttm_place gmr_vram_placement_flags[] = {
82 {
83 .fpfn = 0,
84 .lpfn = 0,
85 .mem_type = VMW_PL_GMR,
86 .flags = 0
87 }, {
88 .fpfn = 0,
89 .lpfn = 0,
90 .mem_type = TTM_PL_VRAM,
91 .flags = 0
92 }
93};
94
95static const struct ttm_place vmw_sys_placement_flags = {
96 .fpfn = 0,
97 .lpfn = 0,
98 .mem_type = VMW_PL_SYSTEM,
99 .flags = 0
100};
101
102struct ttm_placement vmw_vram_gmr_placement = {
103 .num_placement = 2,
104 .placement = vram_gmr_placement_flags,
105 .num_busy_placement = 1,
106 .busy_placement = &gmr_placement_flags
107};
108
109struct ttm_placement vmw_vram_sys_placement = {
110 .num_placement = 1,
111 .placement = &vram_placement_flags,
112 .num_busy_placement = 1,
113 .busy_placement = &sys_placement_flags
114};
115
116struct ttm_placement vmw_sys_placement = {
117 .num_placement = 1,
118 .placement = &sys_placement_flags,
119 .num_busy_placement = 1,
120 .busy_placement = &sys_placement_flags
121};
122
123struct ttm_placement vmw_pt_sys_placement = {
124 .num_placement = 1,
125 .placement = &vmw_sys_placement_flags,
126 .num_busy_placement = 1,
127 .busy_placement = &vmw_sys_placement_flags
128};
129
130static const struct ttm_place nonfixed_placement_flags[] = {
131 {
132 .fpfn = 0,
133 .lpfn = 0,
134 .mem_type = TTM_PL_SYSTEM,
135 .flags = 0
136 }, {
137 .fpfn = 0,
138 .lpfn = 0,
139 .mem_type = VMW_PL_GMR,
140 .flags = 0
141 }, {
142 .fpfn = 0,
143 .lpfn = 0,
144 .mem_type = VMW_PL_MOB,
145 .flags = 0
146 }
147};
148
149struct ttm_placement vmw_srf_placement = {
150 .num_placement = 1,
151 .num_busy_placement = 2,
152 .placement = &gmr_placement_flags,
153 .busy_placement = gmr_vram_placement_flags
154};
155
156struct ttm_placement vmw_mob_placement = {
157 .num_placement = 1,
158 .num_busy_placement = 1,
159 .placement = &mob_placement_flags,
160 .busy_placement = &mob_placement_flags
161};
162
163struct ttm_placement vmw_nonfixed_placement = {
164 .num_placement = 3,
165 .placement = nonfixed_placement_flags,
166 .num_busy_placement = 1,
167 .busy_placement = &sys_placement_flags
168};
169
170const size_t vmw_tt_size = sizeof(struct vmw_ttm_tt);
171
172/**
173 * __vmw_piter_non_sg_next: Helper functions to advance
174 * a struct vmw_piter iterator.
175 *
176 * @viter: Pointer to the iterator.
177 *
178 * These functions return false if past the end of the list,
179 * true otherwise. Functions are selected depending on the current
180 * DMA mapping mode.
181 */
182static bool __vmw_piter_non_sg_next(struct vmw_piter *viter)
183{
184 return ++(viter->i) < viter->num_pages;
185}
186
187static bool __vmw_piter_sg_next(struct vmw_piter *viter)
188{
189 bool ret = __vmw_piter_non_sg_next(viter);
190
191 return __sg_page_iter_dma_next(&viter->iter) && ret;
192}
193
194
195static dma_addr_t __vmw_piter_dma_addr(struct vmw_piter *viter)
196{
197 return viter->addrs[viter->i];
198}
199
200static dma_addr_t __vmw_piter_sg_addr(struct vmw_piter *viter)
201{
202 return sg_page_iter_dma_address(&viter->iter);
203}
204
205
206/**
207 * vmw_piter_start - Initialize a struct vmw_piter.
208 *
209 * @viter: Pointer to the iterator to initialize
210 * @vsgt: Pointer to a struct vmw_sg_table to initialize from
211 * @p_offset: Pointer offset used to update current array position
212 *
213 * Note that we're following the convention of __sg_page_iter_start, so that
214 * the iterator doesn't point to a valid page after initialization; it has
215 * to be advanced one step first.
216 */
217void vmw_piter_start(struct vmw_piter *viter, const struct vmw_sg_table *vsgt,
218 unsigned long p_offset)
219{
220 viter->i = p_offset - 1;
221 viter->num_pages = vsgt->num_pages;
222 viter->pages = vsgt->pages;
223 switch (vsgt->mode) {
224 case vmw_dma_alloc_coherent:
225 viter->next = &__vmw_piter_non_sg_next;
226 viter->dma_address = &__vmw_piter_dma_addr;
227 viter->addrs = vsgt->addrs;
228 break;
229 case vmw_dma_map_populate:
230 case vmw_dma_map_bind:
231 viter->next = &__vmw_piter_sg_next;
232 viter->dma_address = &__vmw_piter_sg_addr;
233 __sg_page_iter_start(&viter->iter.base, vsgt->sgt->sgl,
234 vsgt->sgt->orig_nents, p_offset);
235 break;
236 default:
237 BUG();
238 }
239}
240
241/**
242 * vmw_ttm_unmap_from_dma - unmap device addresses previsouly mapped for
243 * TTM pages
244 *
245 * @vmw_tt: Pointer to a struct vmw_ttm_backend
246 *
247 * Used to free dma mappings previously mapped by vmw_ttm_map_for_dma.
248 */
249static void vmw_ttm_unmap_from_dma(struct vmw_ttm_tt *vmw_tt)
250{
251 struct device *dev = vmw_tt->dev_priv->drm.dev;
252
253 dma_unmap_sgtable(dev, &vmw_tt->sgt, DMA_BIDIRECTIONAL, 0);
254 vmw_tt->sgt.nents = vmw_tt->sgt.orig_nents;
255}
256
257/**
258 * vmw_ttm_map_for_dma - map TTM pages to get device addresses
259 *
260 * @vmw_tt: Pointer to a struct vmw_ttm_backend
261 *
262 * This function is used to get device addresses from the kernel DMA layer.
263 * However, it's violating the DMA API in that when this operation has been
264 * performed, it's illegal for the CPU to write to the pages without first
265 * unmapping the DMA mappings, or calling dma_sync_sg_for_cpu(). It is
266 * therefore only legal to call this function if we know that the function
267 * dma_sync_sg_for_cpu() is a NOP, and dma_sync_sg_for_device() is at most
268 * a CPU write buffer flush.
269 */
270static int vmw_ttm_map_for_dma(struct vmw_ttm_tt *vmw_tt)
271{
272 struct device *dev = vmw_tt->dev_priv->drm.dev;
273
274 return dma_map_sgtable(dev, &vmw_tt->sgt, DMA_BIDIRECTIONAL, 0);
275}
276
277/**
278 * vmw_ttm_map_dma - Make sure TTM pages are visible to the device
279 *
280 * @vmw_tt: Pointer to a struct vmw_ttm_tt
281 *
282 * Select the correct function for and make sure the TTM pages are
283 * visible to the device. Allocate storage for the device mappings.
284 * If a mapping has already been performed, indicated by the storage
285 * pointer being non NULL, the function returns success.
286 */
287static int vmw_ttm_map_dma(struct vmw_ttm_tt *vmw_tt)
288{
289 struct vmw_private *dev_priv = vmw_tt->dev_priv;
290 struct vmw_sg_table *vsgt = &vmw_tt->vsgt;
291 int ret = 0;
292
293 if (vmw_tt->mapped)
294 return 0;
295
296 vsgt->mode = dev_priv->map_mode;
297 vsgt->pages = vmw_tt->dma_ttm.pages;
298 vsgt->num_pages = vmw_tt->dma_ttm.num_pages;
299 vsgt->addrs = vmw_tt->dma_ttm.dma_address;
300 vsgt->sgt = NULL;
301
302 switch (dev_priv->map_mode) {
303 case vmw_dma_map_bind:
304 case vmw_dma_map_populate:
305 vsgt->sgt = &vmw_tt->sgt;
306 ret = sg_alloc_table_from_pages_segment(
307 &vmw_tt->sgt, vsgt->pages, vsgt->num_pages, 0,
308 (unsigned long)vsgt->num_pages << PAGE_SHIFT,
309 dma_get_max_seg_size(dev_priv->drm.dev), GFP_KERNEL);
310 if (ret)
311 goto out_sg_alloc_fail;
312
313 ret = vmw_ttm_map_for_dma(vmw_tt);
314 if (unlikely(ret != 0))
315 goto out_map_fail;
316
317 break;
318 default:
319 break;
320 }
321
322 vmw_tt->mapped = true;
323 return 0;
324
325out_map_fail:
326 sg_free_table(vmw_tt->vsgt.sgt);
327 vmw_tt->vsgt.sgt = NULL;
328out_sg_alloc_fail:
329 return ret;
330}
331
332/**
333 * vmw_ttm_unmap_dma - Tear down any TTM page device mappings
334 *
335 * @vmw_tt: Pointer to a struct vmw_ttm_tt
336 *
337 * Tear down any previously set up device DMA mappings and free
338 * any storage space allocated for them. If there are no mappings set up,
339 * this function is a NOP.
340 */
341static void vmw_ttm_unmap_dma(struct vmw_ttm_tt *vmw_tt)
342{
343 struct vmw_private *dev_priv = vmw_tt->dev_priv;
344
345 if (!vmw_tt->vsgt.sgt)
346 return;
347
348 switch (dev_priv->map_mode) {
349 case vmw_dma_map_bind:
350 case vmw_dma_map_populate:
351 vmw_ttm_unmap_from_dma(vmw_tt);
352 sg_free_table(vmw_tt->vsgt.sgt);
353 vmw_tt->vsgt.sgt = NULL;
354 break;
355 default:
356 break;
357 }
358 vmw_tt->mapped = false;
359}
360
361/**
362 * vmw_bo_sg_table - Return a struct vmw_sg_table object for a
363 * TTM buffer object
364 *
365 * @bo: Pointer to a struct ttm_buffer_object
366 *
367 * Returns a pointer to a struct vmw_sg_table object. The object should
368 * not be freed after use.
369 * Note that for the device addresses to be valid, the buffer object must
370 * either be reserved or pinned.
371 */
372const struct vmw_sg_table *vmw_bo_sg_table(struct ttm_buffer_object *bo)
373{
374 struct vmw_ttm_tt *vmw_tt =
375 container_of(bo->ttm, struct vmw_ttm_tt, dma_ttm);
376
377 return &vmw_tt->vsgt;
378}
379
380
381static int vmw_ttm_bind(struct ttm_device *bdev,
382 struct ttm_tt *ttm, struct ttm_resource *bo_mem)
383{
384 struct vmw_ttm_tt *vmw_be =
385 container_of(ttm, struct vmw_ttm_tt, dma_ttm);
386 int ret = 0;
387
388 if (!bo_mem)
389 return -EINVAL;
390
391 if (vmw_be->bound)
392 return 0;
393
394 ret = vmw_ttm_map_dma(vmw_be);
395 if (unlikely(ret != 0))
396 return ret;
397
398 vmw_be->gmr_id = bo_mem->start;
399 vmw_be->mem_type = bo_mem->mem_type;
400
401 switch (bo_mem->mem_type) {
402 case VMW_PL_GMR:
403 ret = vmw_gmr_bind(vmw_be->dev_priv, &vmw_be->vsgt,
404 ttm->num_pages, vmw_be->gmr_id);
405 break;
406 case VMW_PL_MOB:
407 if (unlikely(vmw_be->mob == NULL)) {
408 vmw_be->mob =
409 vmw_mob_create(ttm->num_pages);
410 if (unlikely(vmw_be->mob == NULL))
411 return -ENOMEM;
412 }
413
414 ret = vmw_mob_bind(vmw_be->dev_priv, vmw_be->mob,
415 &vmw_be->vsgt, ttm->num_pages,
416 vmw_be->gmr_id);
417 break;
418 case VMW_PL_SYSTEM:
419 /* Nothing to be done for a system bind */
420 break;
421 default:
422 BUG();
423 }
424 vmw_be->bound = true;
425 return ret;
426}
427
428static void vmw_ttm_unbind(struct ttm_device *bdev,
429 struct ttm_tt *ttm)
430{
431 struct vmw_ttm_tt *vmw_be =
432 container_of(ttm, struct vmw_ttm_tt, dma_ttm);
433
434 if (!vmw_be->bound)
435 return;
436
437 switch (vmw_be->mem_type) {
438 case VMW_PL_GMR:
439 vmw_gmr_unbind(vmw_be->dev_priv, vmw_be->gmr_id);
440 break;
441 case VMW_PL_MOB:
442 vmw_mob_unbind(vmw_be->dev_priv, vmw_be->mob);
443 break;
444 case VMW_PL_SYSTEM:
445 break;
446 default:
447 BUG();
448 }
449
450 if (vmw_be->dev_priv->map_mode == vmw_dma_map_bind)
451 vmw_ttm_unmap_dma(vmw_be);
452 vmw_be->bound = false;
453}
454
455
456static void vmw_ttm_destroy(struct ttm_device *bdev, struct ttm_tt *ttm)
457{
458 struct vmw_ttm_tt *vmw_be =
459 container_of(ttm, struct vmw_ttm_tt, dma_ttm);
460
461 vmw_ttm_unmap_dma(vmw_be);
462 ttm_tt_fini(ttm);
463 if (vmw_be->mob)
464 vmw_mob_destroy(vmw_be->mob);
465
466 kfree(vmw_be);
467}
468
469
470static int vmw_ttm_populate(struct ttm_device *bdev,
471 struct ttm_tt *ttm, struct ttm_operation_ctx *ctx)
472{
473 int ret;
474
475 /* TODO: maybe completely drop this ? */
476 if (ttm_tt_is_populated(ttm))
477 return 0;
478
479 ret = ttm_pool_alloc(&bdev->pool, ttm, ctx);
480
481 return ret;
482}
483
484static void vmw_ttm_unpopulate(struct ttm_device *bdev,
485 struct ttm_tt *ttm)
486{
487 struct vmw_ttm_tt *vmw_tt = container_of(ttm, struct vmw_ttm_tt,
488 dma_ttm);
489
490 vmw_ttm_unbind(bdev, ttm);
491
492 if (vmw_tt->mob) {
493 vmw_mob_destroy(vmw_tt->mob);
494 vmw_tt->mob = NULL;
495 }
496
497 vmw_ttm_unmap_dma(vmw_tt);
498
499 ttm_pool_free(&bdev->pool, ttm);
500}
501
502static struct ttm_tt *vmw_ttm_tt_create(struct ttm_buffer_object *bo,
503 uint32_t page_flags)
504{
505 struct vmw_ttm_tt *vmw_be;
506 int ret;
507
508 vmw_be = kzalloc(sizeof(*vmw_be), GFP_KERNEL);
509 if (!vmw_be)
510 return NULL;
511
512 vmw_be->dev_priv = container_of(bo->bdev, struct vmw_private, bdev);
513 vmw_be->mob = NULL;
514
515 if (vmw_be->dev_priv->map_mode == vmw_dma_alloc_coherent)
516 ret = ttm_sg_tt_init(&vmw_be->dma_ttm, bo, page_flags,
517 ttm_cached);
518 else
519 ret = ttm_tt_init(&vmw_be->dma_ttm, bo, page_flags,
520 ttm_cached, 0);
521 if (unlikely(ret != 0))
522 goto out_no_init;
523
524 return &vmw_be->dma_ttm;
525out_no_init:
526 kfree(vmw_be);
527 return NULL;
528}
529
530static void vmw_evict_flags(struct ttm_buffer_object *bo,
531 struct ttm_placement *placement)
532{
533 *placement = vmw_sys_placement;
534}
535
536static int vmw_ttm_io_mem_reserve(struct ttm_device *bdev, struct ttm_resource *mem)
537{
538 struct vmw_private *dev_priv = container_of(bdev, struct vmw_private, bdev);
539
540 switch (mem->mem_type) {
541 case TTM_PL_SYSTEM:
542 case VMW_PL_SYSTEM:
543 case VMW_PL_GMR:
544 case VMW_PL_MOB:
545 return 0;
546 case TTM_PL_VRAM:
547 mem->bus.offset = (mem->start << PAGE_SHIFT) +
548 dev_priv->vram_start;
549 mem->bus.is_iomem = true;
550 mem->bus.caching = ttm_cached;
551 break;
552 default:
553 return -EINVAL;
554 }
555 return 0;
556}
557
558/**
559 * vmw_move_notify - TTM move_notify_callback
560 *
561 * @bo: The TTM buffer object about to move.
562 * @old_mem: The old memory where we move from
563 * @new_mem: The struct ttm_resource indicating to what memory
564 * region the move is taking place.
565 *
566 * Calls move_notify for all subsystems needing it.
567 * (currently only resources).
568 */
569static void vmw_move_notify(struct ttm_buffer_object *bo,
570 struct ttm_resource *old_mem,
571 struct ttm_resource *new_mem)
572{
573 vmw_bo_move_notify(bo, new_mem);
574 vmw_query_move_notify(bo, old_mem, new_mem);
575}
576
577
578/**
579 * vmw_swap_notify - TTM move_notify_callback
580 *
581 * @bo: The TTM buffer object about to be swapped out.
582 */
583static void vmw_swap_notify(struct ttm_buffer_object *bo)
584{
585 vmw_bo_swap_notify(bo);
586 (void) ttm_bo_wait(bo, false, false);
587}
588
589static bool vmw_memtype_is_system(uint32_t mem_type)
590{
591 return mem_type == TTM_PL_SYSTEM || mem_type == VMW_PL_SYSTEM;
592}
593
594static int vmw_move(struct ttm_buffer_object *bo,
595 bool evict,
596 struct ttm_operation_ctx *ctx,
597 struct ttm_resource *new_mem,
598 struct ttm_place *hop)
599{
600 struct ttm_resource_manager *old_man = ttm_manager_type(bo->bdev, bo->resource->mem_type);
601 struct ttm_resource_manager *new_man = ttm_manager_type(bo->bdev, new_mem->mem_type);
602 int ret;
603
604 if (new_man->use_tt && !vmw_memtype_is_system(new_mem->mem_type)) {
605 ret = vmw_ttm_bind(bo->bdev, bo->ttm, new_mem);
606 if (ret)
607 return ret;
608 }
609
610 vmw_move_notify(bo, bo->resource, new_mem);
611
612 if (old_man->use_tt && new_man->use_tt) {
613 if (vmw_memtype_is_system(bo->resource->mem_type)) {
614 ttm_bo_move_null(bo, new_mem);
615 return 0;
616 }
617 ret = ttm_bo_wait_ctx(bo, ctx);
618 if (ret)
619 goto fail;
620
621 vmw_ttm_unbind(bo->bdev, bo->ttm);
622 ttm_resource_free(bo, &bo->resource);
623 ttm_bo_assign_mem(bo, new_mem);
624 return 0;
625 } else {
626 ret = ttm_bo_move_memcpy(bo, ctx, new_mem);
627 if (ret)
628 goto fail;
629 }
630 return 0;
631fail:
632 vmw_move_notify(bo, new_mem, bo->resource);
633 return ret;
634}
635
636struct ttm_device_funcs vmw_bo_driver = {
637 .ttm_tt_create = &vmw_ttm_tt_create,
638 .ttm_tt_populate = &vmw_ttm_populate,
639 .ttm_tt_unpopulate = &vmw_ttm_unpopulate,
640 .ttm_tt_destroy = &vmw_ttm_destroy,
641 .eviction_valuable = ttm_bo_eviction_valuable,
642 .evict_flags = vmw_evict_flags,
643 .move = vmw_move,
644 .swap_notify = vmw_swap_notify,
645 .io_mem_reserve = &vmw_ttm_io_mem_reserve,
646};
647
648int vmw_bo_create_and_populate(struct vmw_private *dev_priv,
649 unsigned long bo_size,
650 struct ttm_buffer_object **bo_p)
651{
652 struct ttm_operation_ctx ctx = {
653 .interruptible = false,
654 .no_wait_gpu = false
655 };
656 struct ttm_buffer_object *bo;
657 int ret;
658
659 ret = vmw_bo_create_kernel(dev_priv, bo_size,
660 &vmw_pt_sys_placement,
661 &bo);
662 if (unlikely(ret != 0))
663 return ret;
664
665 ret = ttm_bo_reserve(bo, false, true, NULL);
666 BUG_ON(ret != 0);
667 ret = vmw_ttm_populate(bo->bdev, bo->ttm, &ctx);
668 if (likely(ret == 0)) {
669 struct vmw_ttm_tt *vmw_tt =
670 container_of(bo->ttm, struct vmw_ttm_tt, dma_ttm);
671 ret = vmw_ttm_map_dma(vmw_tt);
672 }
673
674 ttm_bo_unreserve(bo);
675
676 if (likely(ret == 0))
677 *bo_p = bo;
678 return ret;
679}