1/**************************************************************************
2 *
3 * Copyright (c) 2007-2009 VMware, Inc., Palo Alto, CA., USA
4 * All Rights Reserved.
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 * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
29 */
30
31#include <drm/ttm/ttm_bo_driver.h>
32#include <drm/ttm/ttm_placement.h>
33#include <drm/drm_vma_manager.h>
34#include <linux/io.h>
35#include <linux/highmem.h>
36#include <linux/wait.h>
37#include <linux/slab.h>
38#include <linux/vmalloc.h>
39#include <linux/module.h>
40#include <linux/export.h>
41
42#ifdef __NetBSD__ /* PMAP_* caching flags for ttm_io_prot */
43#include <uvm/uvm_pmap.h>
44#endif
45
46void ttm_bo_free_old_node(struct ttm_buffer_object *bo)
47{
48 ttm_bo_mem_put(bo, &bo->mem);
49}
50
51int ttm_bo_move_ttm(struct ttm_buffer_object *bo,
52 bool evict,
53 bool no_wait_gpu, struct ttm_mem_reg *new_mem)
54{
55 struct ttm_tt *ttm = bo->ttm;
56 struct ttm_mem_reg *old_mem = &bo->mem;
57 int ret;
58
59 if (old_mem->mem_type != TTM_PL_SYSTEM) {
60 ttm_tt_unbind(ttm);
61 ttm_bo_free_old_node(bo);
62 ttm_flag_masked(&old_mem->placement, TTM_PL_FLAG_SYSTEM,
63 TTM_PL_MASK_MEM);
64 old_mem->mem_type = TTM_PL_SYSTEM;
65 }
66
67 ret = ttm_tt_set_placement_caching(ttm, new_mem->placement);
68 if (unlikely(ret != 0))
69 return ret;
70
71 if (new_mem->mem_type != TTM_PL_SYSTEM) {
72 ret = ttm_tt_bind(ttm, new_mem);
73 if (unlikely(ret != 0))
74 return ret;
75 }
76
77 *old_mem = *new_mem;
78 new_mem->mm_node = NULL;
79
80 return 0;
81}
82EXPORT_SYMBOL(ttm_bo_move_ttm);
83
84int ttm_mem_io_lock(struct ttm_mem_type_manager *man, bool interruptible)
85{
86 if (likely(man->io_reserve_fastpath))
87 return 0;
88
89 if (interruptible)
90 return mutex_lock_interruptible(&man->io_reserve_mutex);
91
92 mutex_lock(&man->io_reserve_mutex);
93 return 0;
94}
95EXPORT_SYMBOL(ttm_mem_io_lock);
96
97void ttm_mem_io_unlock(struct ttm_mem_type_manager *man)
98{
99 if (likely(man->io_reserve_fastpath))
100 return;
101
102 mutex_unlock(&man->io_reserve_mutex);
103}
104EXPORT_SYMBOL(ttm_mem_io_unlock);
105
106static int ttm_mem_io_evict(struct ttm_mem_type_manager *man)
107{
108 struct ttm_buffer_object *bo;
109
110 if (!man->use_io_reserve_lru || list_empty(&man->io_reserve_lru))
111 return -EAGAIN;
112
113 bo = list_first_entry(&man->io_reserve_lru,
114 struct ttm_buffer_object,
115 io_reserve_lru);
116 list_del_init(&bo->io_reserve_lru);
117 ttm_bo_unmap_virtual_locked(bo);
118
119 return 0;
120}
121
122
123int ttm_mem_io_reserve(struct ttm_bo_device *bdev,
124 struct ttm_mem_reg *mem)
125{
126 struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
127 int ret = 0;
128
129 if (!bdev->driver->io_mem_reserve)
130 return 0;
131 if (likely(man->io_reserve_fastpath))
132 return bdev->driver->io_mem_reserve(bdev, mem);
133
134 if (bdev->driver->io_mem_reserve &&
135 mem->bus.io_reserved_count++ == 0) {
136retry:
137 ret = bdev->driver->io_mem_reserve(bdev, mem);
138 if (ret == -EAGAIN) {
139 ret = ttm_mem_io_evict(man);
140 if (ret == 0)
141 goto retry;
142 }
143 }
144 return ret;
145}
146EXPORT_SYMBOL(ttm_mem_io_reserve);
147
148void ttm_mem_io_free(struct ttm_bo_device *bdev,
149 struct ttm_mem_reg *mem)
150{
151 struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
152
153 if (likely(man->io_reserve_fastpath))
154 return;
155
156 if (bdev->driver->io_mem_reserve &&
157 --mem->bus.io_reserved_count == 0 &&
158 bdev->driver->io_mem_free)
159 bdev->driver->io_mem_free(bdev, mem);
160
161}
162EXPORT_SYMBOL(ttm_mem_io_free);
163
164int ttm_mem_io_reserve_vm(struct ttm_buffer_object *bo)
165{
166 struct ttm_mem_reg *mem = &bo->mem;
167 int ret;
168
169 if (!mem->bus.io_reserved_vm) {
170 struct ttm_mem_type_manager *man =
171 &bo->bdev->man[mem->mem_type];
172
173 ret = ttm_mem_io_reserve(bo->bdev, mem);
174 if (unlikely(ret != 0))
175 return ret;
176 mem->bus.io_reserved_vm = true;
177 if (man->use_io_reserve_lru)
178 list_add_tail(&bo->io_reserve_lru,
179 &man->io_reserve_lru);
180 }
181 return 0;
182}
183
184void ttm_mem_io_free_vm(struct ttm_buffer_object *bo)
185{
186 struct ttm_mem_reg *mem = &bo->mem;
187
188 if (mem->bus.io_reserved_vm) {
189 mem->bus.io_reserved_vm = false;
190 list_del_init(&bo->io_reserve_lru);
191 ttm_mem_io_free(bo->bdev, mem);
192 }
193}
194
195static int ttm_mem_reg_ioremap(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem,
196 void **virtual)
197{
198 struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
199 int ret;
200 void *addr;
201
202 *virtual = NULL;
203 (void) ttm_mem_io_lock(man, false);
204 ret = ttm_mem_io_reserve(bdev, mem);
205 ttm_mem_io_unlock(man);
206 if (ret || !mem->bus.is_iomem)
207 return ret;
208
209 if (mem->bus.addr) {
210 addr = mem->bus.addr;
211 } else {
212#ifdef __NetBSD__
213 const bus_addr_t bus_addr = (mem->bus.base + mem->bus.offset);
214 int flags = BUS_SPACE_MAP_LINEAR;
215
216 if (ISSET(mem->placement, TTM_PL_FLAG_WC))
217 flags |= BUS_SPACE_MAP_PREFETCHABLE;
218 /* XXX errno NetBSD->Linux */
219 ret = -bus_space_map(bdev->memt, bus_addr, mem->bus.size,
220 flags, &mem->bus.memh);
221 if (ret) {
222 (void) ttm_mem_io_lock(man, false);
223 ttm_mem_io_free(bdev, mem);
224 ttm_mem_io_unlock(man);
225 return ret;
226 }
227 addr = bus_space_vaddr(bdev->memt, mem->bus.memh);
228#else
229 if (mem->placement & TTM_PL_FLAG_WC)
230 addr = ioremap_wc(mem->bus.base + mem->bus.offset, mem->bus.size);
231 else
232 addr = ioremap_nocache(mem->bus.base + mem->bus.offset, mem->bus.size);
233 if (!addr) {
234 (void) ttm_mem_io_lock(man, false);
235 ttm_mem_io_free(bdev, mem);
236 ttm_mem_io_unlock(man);
237 return -ENOMEM;
238 }
239#endif
240 }
241 *virtual = addr;
242 return 0;
243}
244
245static void ttm_mem_reg_iounmap(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem,
246 void *virtual)
247{
248 struct ttm_mem_type_manager *man;
249
250 man = &bdev->man[mem->mem_type];
251
252 if (virtual && mem->bus.addr == NULL)
253#ifdef __NetBSD__
254 bus_space_unmap(bdev->memt, mem->bus.memh, mem->bus.size);
255#else
256 iounmap(virtual);
257#endif
258 (void) ttm_mem_io_lock(man, false);
259 ttm_mem_io_free(bdev, mem);
260 ttm_mem_io_unlock(man);
261}
262
263#ifdef __NetBSD__
264# define ioread32 fake_ioread32
265# define iowrite32 fake_iowrite32
266
267static inline uint32_t
268fake_ioread32(const volatile uint32_t *p)
269{
270 uint32_t v;
271
272 v = *p;
273 __insn_barrier(); /* XXX */
274
275 return v;
276}
277
278static inline void
279iowrite32(uint32_t v, volatile uint32_t *p)
280{
281
282 __insn_barrier(); /* XXX */
283 *p = v;
284}
285#endif
286
287static int ttm_copy_io_page(void *dst, void *src, unsigned long page)
288{
289 uint32_t *dstP =
290 (uint32_t *) ((unsigned long)dst + (page << PAGE_SHIFT));
291 uint32_t *srcP =
292 (uint32_t *) ((unsigned long)src + (page << PAGE_SHIFT));
293
294 int i;
295 for (i = 0; i < PAGE_SIZE / sizeof(uint32_t); ++i)
296 iowrite32(ioread32(srcP++), dstP++);
297 return 0;
298}
299
300#ifdef __NetBSD__
301# undef ioread32
302# undef iowrite32
303#endif
304
305static int ttm_copy_io_ttm_page(struct ttm_tt *ttm, void *src,
306 unsigned long page,
307 pgprot_t prot)
308{
309 struct page *d = ttm->pages[page];
310 void *dst;
311
312 if (!d)
313 return -ENOMEM;
314
315 src = (void *)((unsigned long)src + (page << PAGE_SHIFT));
316
317#ifdef CONFIG_X86
318 dst = kmap_atomic_prot(d, prot);
319#else
320 if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL))
321 dst = vmap(&d, 1, 0, prot);
322 else
323 dst = kmap(d);
324#endif
325 if (!dst)
326 return -ENOMEM;
327
328 memcpy_fromio(dst, src, PAGE_SIZE);
329
330#ifdef CONFIG_X86
331 kunmap_atomic(dst);
332#else
333 if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL))
334#ifdef __NetBSD__
335 vunmap(dst, 1);
336#else
337 vunmap(dst);
338#endif
339 else
340 kunmap(d);
341#endif
342
343 return 0;
344}
345
346static int ttm_copy_ttm_io_page(struct ttm_tt *ttm, void *dst,
347 unsigned long page,
348 pgprot_t prot)
349{
350 struct page *s = ttm->pages[page];
351 void *src;
352
353 if (!s)
354 return -ENOMEM;
355
356 dst = (void *)((unsigned long)dst + (page << PAGE_SHIFT));
357#ifdef CONFIG_X86
358 src = kmap_atomic_prot(s, prot);
359#else
360 if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL))
361 src = vmap(&s, 1, 0, prot);
362 else
363 src = kmap(s);
364#endif
365 if (!src)
366 return -ENOMEM;
367
368 memcpy_toio(dst, src, PAGE_SIZE);
369
370#ifdef CONFIG_X86
371 kunmap_atomic(src);
372#else
373 if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL))
374#ifdef __NetBSD__
375 vunmap(src, 1);
376#else
377 vunmap(src);
378#endif
379 else
380 kunmap(s);
381#endif
382
383 return 0;
384}
385
386int ttm_bo_move_memcpy(struct ttm_buffer_object *bo,
387 bool evict, bool no_wait_gpu,
388 struct ttm_mem_reg *new_mem)
389{
390 struct ttm_bo_device *bdev = bo->bdev;
391 struct ttm_mem_type_manager *man = &bdev->man[new_mem->mem_type];
392 struct ttm_tt *ttm = bo->ttm;
393 struct ttm_mem_reg *old_mem = &bo->mem;
394 struct ttm_mem_reg old_copy = *old_mem;
395 void *old_iomap;
396 void *new_iomap;
397 int ret;
398 unsigned long i;
399 unsigned long page;
400 unsigned long add = 0;
401 int dir;
402
403 ret = ttm_mem_reg_ioremap(bdev, old_mem, &old_iomap);
404 if (ret)
405 return ret;
406 ret = ttm_mem_reg_ioremap(bdev, new_mem, &new_iomap);
407 if (ret)
408 goto out;
409
410 /*
411 * Single TTM move. NOP.
412 */
413 if (old_iomap == NULL && new_iomap == NULL)
414 goto out2;
415
416 /*
417 * Don't move nonexistent data. Clear destination instead.
418 */
419 if (old_iomap == NULL &&
420 (ttm == NULL || (ttm->state == tt_unpopulated &&
421 !(ttm->page_flags & TTM_PAGE_FLAG_SWAPPED)))) {
422 memset_io(new_iomap, 0, new_mem->num_pages*PAGE_SIZE);
423 goto out2;
424 }
425
426 /*
427 * TTM might be null for moves within the same region.
428 */
429 if (ttm && ttm->state == tt_unpopulated) {
430 ret = ttm->bdev->driver->ttm_tt_populate(ttm);
431 if (ret)
432 goto out1;
433 }
434
435 add = 0;
436 dir = 1;
437
438 if ((old_mem->mem_type == new_mem->mem_type) &&
439 (new_mem->start < old_mem->start + old_mem->size)) {
440 dir = -1;
441 add = new_mem->num_pages - 1;
442 }
443
444 for (i = 0; i < new_mem->num_pages; ++i) {
445 page = i * dir + add;
446 if (old_iomap == NULL) {
447 pgprot_t prot = ttm_io_prot(old_mem->placement,
448 PAGE_KERNEL);
449 ret = ttm_copy_ttm_io_page(ttm, new_iomap, page,
450 prot);
451 } else if (new_iomap == NULL) {
452 pgprot_t prot = ttm_io_prot(new_mem->placement,
453 PAGE_KERNEL);
454 ret = ttm_copy_io_ttm_page(ttm, old_iomap, page,
455 prot);
456 } else
457 ret = ttm_copy_io_page(new_iomap, old_iomap, page);
458 if (ret)
459 goto out1;
460 }
461 mb();
462out2:
463 old_copy = *old_mem;
464 *old_mem = *new_mem;
465 new_mem->mm_node = NULL;
466
467 if ((man->flags & TTM_MEMTYPE_FLAG_FIXED) && (ttm != NULL)) {
468 ttm_tt_unbind(ttm);
469 ttm_tt_destroy(ttm);
470 bo->ttm = NULL;
471 }
472
473out1:
474 ttm_mem_reg_iounmap(bdev, old_mem, new_iomap);
475out:
476 ttm_mem_reg_iounmap(bdev, &old_copy, old_iomap);
477
478 /*
479 * On error, keep the mm node!
480 */
481 if (!ret)
482 ttm_bo_mem_put(bo, &old_copy);
483 return ret;
484}
485EXPORT_SYMBOL(ttm_bo_move_memcpy);
486
487static void ttm_transfered_destroy(struct ttm_buffer_object *bo)
488{
489 kfree(bo);
490}
491
492/**
493 * ttm_buffer_object_transfer
494 *
495 * @bo: A pointer to a struct ttm_buffer_object.
496 * @new_obj: A pointer to a pointer to a newly created ttm_buffer_object,
497 * holding the data of @bo with the old placement.
498 *
499 * This is a utility function that may be called after an accelerated move
500 * has been scheduled. A new buffer object is created as a placeholder for
501 * the old data while it's being copied. When that buffer object is idle,
502 * it can be destroyed, releasing the space of the old placement.
503 * Returns:
504 * !0: Failure.
505 */
506
507static int ttm_buffer_object_transfer(struct ttm_buffer_object *bo,
508 struct ttm_buffer_object **new_obj)
509{
510 struct ttm_buffer_object *fbo;
511 struct ttm_bo_device *bdev = bo->bdev;
512 struct ttm_bo_driver *driver = bdev->driver;
513 int ret;
514
515 fbo = kmalloc(sizeof(*fbo), GFP_KERNEL);
516 if (!fbo)
517 return -ENOMEM;
518
519 *fbo = *bo;
520
521 /**
522 * Fix up members that we shouldn't copy directly:
523 * TODO: Explicit member copy would probably be better here.
524 */
525
526 INIT_LIST_HEAD(&fbo->ddestroy);
527 INIT_LIST_HEAD(&fbo->lru);
528 INIT_LIST_HEAD(&fbo->swap);
529 INIT_LIST_HEAD(&fbo->io_reserve_lru);
530#ifdef __NetBSD__
531 linux_mutex_init(&fbo->wu_mutex);
532 drm_vma_node_init(&fbo->vma_node);
533 uvm_obj_init(&fbo->uvmobj, bdev->driver->ttm_uvm_ops, true, 1);
534 mutex_obj_hold(bo->uvmobj.vmobjlock);
535 uvm_obj_setlock(&fbo->uvmobj, bo->uvmobj.vmobjlock);
536#else
537 mutex_init(&fbo->wu_mutex);
538 drm_vma_node_reset(&fbo->vma_node);
539#endif
540 atomic_set(&fbo->cpu_writers, 0);
541
542 spin_lock(&bdev->fence_lock);
543 if (bo->sync_obj)
544 fbo->sync_obj = driver->sync_obj_ref(bo->sync_obj);
545 else
546 fbo->sync_obj = NULL;
547 spin_unlock(&bdev->fence_lock);
548 kref_init(&fbo->list_kref);
549 kref_init(&fbo->kref);
550 fbo->destroy = &ttm_transfered_destroy;
551 fbo->acc_size = 0;
552 fbo->resv = &fbo->ttm_resv;
553 reservation_object_init(fbo->resv);
554 ret = ww_mutex_trylock(&fbo->resv->lock);
555 WARN_ON(!ret);
556
557 *new_obj = fbo;
558 return 0;
559}
560
561pgprot_t ttm_io_prot(uint32_t caching_flags, pgprot_t tmp)
562{
563#ifdef __NetBSD__
564 switch (caching_flags & TTM_PL_MASK_CACHING) {
565 case TTM_PL_FLAG_CACHED:
566 return (tmp | PMAP_WRITE_BACK);
567 case TTM_PL_FLAG_WC:
568 return (tmp | PMAP_WRITE_COMBINE);
569 case TTM_PL_FLAG_UNCACHED:
570 return (tmp | PMAP_NOCACHE);
571 default:
572 panic("invalid caching flags: %"PRIx32"\n",
573 (caching_flags & TTM_PL_MASK_CACHING));
574 }
575#else
576#if defined(__i386__) || defined(__x86_64__)
577 if (caching_flags & TTM_PL_FLAG_WC)
578 tmp = pgprot_writecombine(tmp);
579 else if (boot_cpu_data.x86 > 3)
580 tmp = pgprot_noncached(tmp);
581
582#elif defined(__powerpc__)
583 if (!(caching_flags & TTM_PL_FLAG_CACHED)) {
584 pgprot_val(tmp) |= _PAGE_NO_CACHE;
585 if (caching_flags & TTM_PL_FLAG_UNCACHED)
586 pgprot_val(tmp) |= _PAGE_GUARDED;
587 }
588#endif
589#if defined(__ia64__)
590 if (caching_flags & TTM_PL_FLAG_WC)
591 tmp = pgprot_writecombine(tmp);
592 else
593 tmp = pgprot_noncached(tmp);
594#endif
595#if defined(__sparc__) || defined(__mips__)
596 if (!(caching_flags & TTM_PL_FLAG_CACHED))
597 tmp = pgprot_noncached(tmp);
598#endif
599 return tmp;
600#endif
601}
602EXPORT_SYMBOL(ttm_io_prot);
603
604static int ttm_bo_ioremap(struct ttm_buffer_object *bo,
605 unsigned long offset,
606 unsigned long size,
607 struct ttm_bo_kmap_obj *map)
608{
609 struct ttm_mem_reg *mem = &bo->mem;
610
611 if (bo->mem.bus.addr) {
612 map->bo_kmap_type = ttm_bo_map_premapped;
613 map->virtual = (void *)(((u8 *)bo->mem.bus.addr) + offset);
614 } else {
615 map->bo_kmap_type = ttm_bo_map_iomap;
616#ifdef __NetBSD__
617 {
618 bus_addr_t addr;
619 int flags = BUS_SPACE_MAP_LINEAR;
620 int ret;
621
622 addr = (bo->mem.bus.base + bo->mem.bus.offset + offset);
623 if (ISSET(mem->placement, TTM_PL_FLAG_WC))
624 flags |= BUS_SPACE_MAP_PREFETCHABLE;
625 /* XXX errno NetBSD->Linux */
626 ret = -bus_space_map(bo->bdev->memt, addr, size, flags,
627 &map->u.io.memh);
628 if (ret)
629 return ret;
630 map->u.io.size = size;
631 map->virtual = bus_space_vaddr(bo->bdev->memt, map->u.io.memh);
632 }
633#else
634 if (mem->placement & TTM_PL_FLAG_WC)
635 map->virtual = ioremap_wc(bo->mem.bus.base + bo->mem.bus.offset + offset,
636 size);
637 else
638 map->virtual = ioremap_nocache(bo->mem.bus.base + bo->mem.bus.offset + offset,
639 size);
640#endif
641 }
642 return (!map->virtual) ? -ENOMEM : 0;
643}
644
645static int ttm_bo_kmap_ttm(struct ttm_buffer_object *bo,
646 unsigned long start_page,
647 unsigned long num_pages,
648 struct ttm_bo_kmap_obj *map)
649{
650 struct ttm_mem_reg *mem = &bo->mem;
651 pgprot_t prot;
652 struct ttm_tt *ttm = bo->ttm;
653#ifdef __NetBSD__
654 unsigned i;
655 vaddr_t vaddr;
656#endif
657 int ret;
658
659 BUG_ON(!ttm);
660
661 if (ttm->state == tt_unpopulated) {
662 ret = ttm->bdev->driver->ttm_tt_populate(ttm);
663 if (ret)
664 return ret;
665 }
666
667#ifdef __NetBSD__
668 /*
669 * Can't use uvm_map here because it provides no way to pass
670 * along the cacheability flags. So we'll uvm_km_alloc
671 * ourselves some KVA and then pmap_kenter_pa directly.
672 */
673
674 KASSERT(num_pages <= ttm->num_pages);
675 KASSERT(start_page <= (ttm->num_pages - num_pages));
676 prot = ttm_io_prot(mem->placement, (VM_PROT_READ | VM_PROT_WRITE));
677 vaddr = uvm_km_alloc(kernel_map, (num_pages << PAGE_SHIFT), PAGE_SIZE,
678 UVM_KMF_VAONLY | UVM_KMF_CANFAIL | UVM_KMF_WAITVA);
679 if (vaddr == 0)
680 return -ENOMEM;
681 for (i = 0; i < num_pages; i++)
682 pmap_kenter_pa(vaddr + i*PAGE_SIZE,
683 page_to_phys(ttm->pages[start_page + i]),
684 (VM_PROT_READ | VM_PROT_WRITE), prot);
685 pmap_update(pmap_kernel());
686 map->bo_kmap_type = ttm_bo_map_vmap;
687 map->u.uvm.vsize = (num_pages << PAGE_SHIFT);
688 map->virtual = (void *)vaddr;
689 return 0;
690#else
691 if (num_pages == 1 && (mem->placement & TTM_PL_FLAG_CACHED)) {
692 /*
693 * We're mapping a single page, and the desired
694 * page protection is consistent with the bo.
695 */
696
697 map->bo_kmap_type = ttm_bo_map_kmap;
698 map->page = ttm->pages[start_page];
699 map->virtual = kmap(map->page);
700 } else {
701 /*
702 * We need to use vmap to get the desired page protection
703 * or to make the buffer object look contiguous.
704 */
705 prot = (mem->placement & TTM_PL_FLAG_CACHED) ?
706 PAGE_KERNEL :
707 ttm_io_prot(mem->placement, PAGE_KERNEL);
708 map->bo_kmap_type = ttm_bo_map_vmap;
709 map->virtual = vmap(ttm->pages + start_page, num_pages,
710 0, prot);
711 }
712 return (!map->virtual) ? -ENOMEM : 0;
713#endif
714}
715
716int ttm_bo_kmap(struct ttm_buffer_object *bo,
717 unsigned long start_page, unsigned long num_pages,
718 struct ttm_bo_kmap_obj *map)
719{
720 struct ttm_mem_type_manager *man =
721 &bo->bdev->man[bo->mem.mem_type];
722 unsigned long offset, size;
723 int ret;
724
725 BUG_ON(!list_empty(&bo->swap));
726 map->virtual = NULL;
727 map->bo = bo;
728 if (num_pages > bo->num_pages)
729 return -EINVAL;
730 if (start_page > bo->num_pages)
731 return -EINVAL;
732#if 0
733 if (num_pages > 1 && !capable(CAP_SYS_ADMIN))
734 return -EPERM;
735#endif
736 (void) ttm_mem_io_lock(man, false);
737 ret = ttm_mem_io_reserve(bo->bdev, &bo->mem);
738 ttm_mem_io_unlock(man);
739 if (ret)
740 return ret;
741 if (!bo->mem.bus.is_iomem) {
742 return ttm_bo_kmap_ttm(bo, start_page, num_pages, map);
743 } else {
744 offset = start_page << PAGE_SHIFT;
745 size = num_pages << PAGE_SHIFT;
746 return ttm_bo_ioremap(bo, offset, size, map);
747 }
748}
749EXPORT_SYMBOL(ttm_bo_kmap);
750
751void ttm_bo_kunmap(struct ttm_bo_kmap_obj *map)
752{
753 struct ttm_buffer_object *bo = map->bo;
754 struct ttm_mem_type_manager *man =
755 &bo->bdev->man[bo->mem.mem_type];
756
757 if (!map->virtual)
758 return;
759 switch (map->bo_kmap_type) {
760 case ttm_bo_map_iomap:
761#ifdef __NetBSD__
762 bus_space_unmap(bo->bdev->memt, map->u.io.memh,
763 map->u.io.size);
764#else
765 iounmap(map->virtual);
766#endif
767 break;
768 case ttm_bo_map_vmap:
769#ifdef __NetBSD__
770 pmap_kremove((vaddr_t)map->virtual, map->u.uvm.vsize);
771 pmap_update(pmap_kernel());
772 uvm_km_free(kernel_map, (vaddr_t)map->virtual,
773 map->u.uvm.vsize, UVM_KMF_VAONLY);
774#else
775 vunmap(map->virtual);
776#endif
777 break;
778 case ttm_bo_map_kmap:
779#ifdef __NetBSD__
780 panic("ttm_bo_map_kmap does not exist in NetBSD");
781#else
782 kunmap(map->page);
783#endif
784 break;
785 case ttm_bo_map_premapped:
786 break;
787 default:
788 BUG();
789 }
790 (void) ttm_mem_io_lock(man, false);
791 ttm_mem_io_free(map->bo->bdev, &map->bo->mem);
792 ttm_mem_io_unlock(man);
793 map->virtual = NULL;
794#ifndef __NetBSD__
795 map->page = NULL;
796#endif
797}
798EXPORT_SYMBOL(ttm_bo_kunmap);
799
800int ttm_bo_move_accel_cleanup(struct ttm_buffer_object *bo,
801 void *sync_obj,
802 bool evict,
803 bool no_wait_gpu,
804 struct ttm_mem_reg *new_mem)
805{
806 struct ttm_bo_device *bdev = bo->bdev;
807 struct ttm_bo_driver *driver = bdev->driver;
808 struct ttm_mem_type_manager *man = &bdev->man[new_mem->mem_type];
809 struct ttm_mem_reg *old_mem = &bo->mem;
810 int ret;
811 struct ttm_buffer_object *ghost_obj;
812 void *tmp_obj = NULL;
813
814 spin_lock(&bdev->fence_lock);
815 if (bo->sync_obj) {
816 tmp_obj = bo->sync_obj;
817 bo->sync_obj = NULL;
818 }
819 bo->sync_obj = driver->sync_obj_ref(sync_obj);
820 if (evict) {
821 ret = ttm_bo_wait(bo, false, false, false);
822 spin_unlock(&bdev->fence_lock);
823 if (tmp_obj)
824 driver->sync_obj_unref(&tmp_obj);
825 if (ret)
826 return ret;
827
828 if ((man->flags & TTM_MEMTYPE_FLAG_FIXED) &&
829 (bo->ttm != NULL)) {
830 ttm_tt_unbind(bo->ttm);
831 ttm_tt_destroy(bo->ttm);
832 bo->ttm = NULL;
833 }
834 ttm_bo_free_old_node(bo);
835 } else {
836 /**
837 * This should help pipeline ordinary buffer moves.
838 *
839 * Hang old buffer memory on a new buffer object,
840 * and leave it to be released when the GPU
841 * operation has completed.
842 */
843
844 set_bit(TTM_BO_PRIV_FLAG_MOVING, &bo->priv_flags);
845 spin_unlock(&bdev->fence_lock);
846 if (tmp_obj)
847 driver->sync_obj_unref(&tmp_obj);
848
849 ret = ttm_buffer_object_transfer(bo, &ghost_obj);
850 if (ret)
851 return ret;
852
853 /**
854 * If we're not moving to fixed memory, the TTM object
855 * needs to stay alive. Otherwhise hang it on the ghost
856 * bo to be unbound and destroyed.
857 */
858
859 if (!(man->flags & TTM_MEMTYPE_FLAG_FIXED))
860 ghost_obj->ttm = NULL;
861 else
862 bo->ttm = NULL;
863
864 ttm_bo_unreserve(ghost_obj);
865 ttm_bo_unref(&ghost_obj);
866 }
867
868 *old_mem = *new_mem;
869 new_mem->mm_node = NULL;
870
871 return 0;
872}
873EXPORT_SYMBOL(ttm_bo_move_accel_cleanup);
874