1 /**************************************************************************
3 * Copyright (c) 2007-2009 VMware, Inc., Palo Alto, CA., USA
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:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
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.
26 **************************************************************************/
28 * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
31 #include <drm/ttm/ttm_bo_driver.h>
32 #include <drm/ttm/ttm_placement.h>
34 #include <linux/highmem.h>
35 #include <linux/wait.h>
36 #include <linux/slab.h>
37 #include <linux/vmalloc.h>
38 #include <linux/module.h>
40 void ttm_bo_free_old_node(struct ttm_buffer_object *bo)
42 ttm_bo_mem_put(bo, &bo->mem);
45 int ttm_bo_move_ttm(struct ttm_buffer_object *bo,
47 bool no_wait_gpu, struct ttm_mem_reg *new_mem)
49 struct ttm_tt *ttm = bo->ttm;
50 struct ttm_mem_reg *old_mem = &bo->mem;
53 if (old_mem->mem_type != TTM_PL_SYSTEM) {
55 ttm_bo_free_old_node(bo);
56 ttm_flag_masked(&old_mem->placement, TTM_PL_FLAG_SYSTEM,
58 old_mem->mem_type = TTM_PL_SYSTEM;
61 ret = ttm_tt_set_placement_caching(ttm, new_mem->placement);
62 if (unlikely(ret != 0))
65 if (new_mem->mem_type != TTM_PL_SYSTEM) {
66 ret = ttm_tt_bind(ttm, new_mem);
67 if (unlikely(ret != 0))
72 new_mem->mm_node = NULL;
76 EXPORT_SYMBOL(ttm_bo_move_ttm);
78 int ttm_mem_io_lock(struct ttm_mem_type_manager *man, bool interruptible)
80 if (likely(man->io_reserve_fastpath))
84 return mutex_lock_interruptible(&man->io_reserve_mutex);
86 mutex_lock(&man->io_reserve_mutex);
89 EXPORT_SYMBOL(ttm_mem_io_lock);
91 void ttm_mem_io_unlock(struct ttm_mem_type_manager *man)
93 if (likely(man->io_reserve_fastpath))
96 mutex_unlock(&man->io_reserve_mutex);
98 EXPORT_SYMBOL(ttm_mem_io_unlock);
100 static int ttm_mem_io_evict(struct ttm_mem_type_manager *man)
102 struct ttm_buffer_object *bo;
104 if (!man->use_io_reserve_lru || list_empty(&man->io_reserve_lru))
107 bo = list_first_entry(&man->io_reserve_lru,
108 struct ttm_buffer_object,
110 list_del_init(&bo->io_reserve_lru);
111 ttm_bo_unmap_virtual_locked(bo);
117 int ttm_mem_io_reserve(struct ttm_bo_device *bdev,
118 struct ttm_mem_reg *mem)
120 struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
123 if (!bdev->driver->io_mem_reserve)
125 if (likely(man->io_reserve_fastpath))
126 return bdev->driver->io_mem_reserve(bdev, mem);
128 if (bdev->driver->io_mem_reserve &&
129 mem->bus.io_reserved_count++ == 0) {
131 ret = bdev->driver->io_mem_reserve(bdev, mem);
132 if (ret == -EAGAIN) {
133 ret = ttm_mem_io_evict(man);
140 EXPORT_SYMBOL(ttm_mem_io_reserve);
142 void ttm_mem_io_free(struct ttm_bo_device *bdev,
143 struct ttm_mem_reg *mem)
145 struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
147 if (likely(man->io_reserve_fastpath))
150 if (bdev->driver->io_mem_reserve &&
151 --mem->bus.io_reserved_count == 0 &&
152 bdev->driver->io_mem_free)
153 bdev->driver->io_mem_free(bdev, mem);
156 EXPORT_SYMBOL(ttm_mem_io_free);
158 int ttm_mem_io_reserve_vm(struct ttm_buffer_object *bo)
160 struct ttm_mem_reg *mem = &bo->mem;
163 if (!mem->bus.io_reserved_vm) {
164 struct ttm_mem_type_manager *man =
165 &bo->bdev->man[mem->mem_type];
167 ret = ttm_mem_io_reserve(bo->bdev, mem);
168 if (unlikely(ret != 0))
170 mem->bus.io_reserved_vm = true;
171 if (man->use_io_reserve_lru)
172 list_add_tail(&bo->io_reserve_lru,
173 &man->io_reserve_lru);
178 void ttm_mem_io_free_vm(struct ttm_buffer_object *bo)
180 struct ttm_mem_reg *mem = &bo->mem;
182 if (mem->bus.io_reserved_vm) {
183 mem->bus.io_reserved_vm = false;
184 list_del_init(&bo->io_reserve_lru);
185 ttm_mem_io_free(bo->bdev, mem);
189 int ttm_mem_reg_ioremap(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem,
192 struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
197 (void) ttm_mem_io_lock(man, false);
198 ret = ttm_mem_io_reserve(bdev, mem);
199 ttm_mem_io_unlock(man);
200 if (ret || !mem->bus.is_iomem)
204 addr = mem->bus.addr;
206 if (mem->placement & TTM_PL_FLAG_WC)
207 addr = ioremap_wc(mem->bus.base + mem->bus.offset, mem->bus.size);
209 addr = ioremap_nocache(mem->bus.base + mem->bus.offset, mem->bus.size);
211 (void) ttm_mem_io_lock(man, false);
212 ttm_mem_io_free(bdev, mem);
213 ttm_mem_io_unlock(man);
221 void ttm_mem_reg_iounmap(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem,
224 struct ttm_mem_type_manager *man;
226 man = &bdev->man[mem->mem_type];
228 if (virtual && mem->bus.addr == NULL)
230 (void) ttm_mem_io_lock(man, false);
231 ttm_mem_io_free(bdev, mem);
232 ttm_mem_io_unlock(man);
235 static int ttm_copy_io_page(void *dst, void *src, unsigned long page)
238 (uint32_t *) ((unsigned long)dst + (page << PAGE_SHIFT));
240 (uint32_t *) ((unsigned long)src + (page << PAGE_SHIFT));
243 for (i = 0; i < PAGE_SIZE / sizeof(uint32_t); ++i)
244 iowrite32(ioread32(srcP++), dstP++);
248 static int ttm_copy_io_ttm_page(struct ttm_tt *ttm, void *src,
252 struct page *d = ttm->pages[page];
258 src = (void *)((unsigned long)src + (page << PAGE_SHIFT));
261 dst = kmap_atomic_prot(d, prot);
263 if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL))
264 dst = vmap(&d, 1, 0, prot);
271 memcpy_fromio(dst, src, PAGE_SIZE);
276 if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL))
285 static int ttm_copy_ttm_io_page(struct ttm_tt *ttm, void *dst,
289 struct page *s = ttm->pages[page];
295 dst = (void *)((unsigned long)dst + (page << PAGE_SHIFT));
297 src = kmap_atomic_prot(s, prot);
299 if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL))
300 src = vmap(&s, 1, 0, prot);
307 memcpy_toio(dst, src, PAGE_SIZE);
312 if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL))
321 int ttm_bo_move_memcpy(struct ttm_buffer_object *bo,
322 bool evict, bool no_wait_gpu,
323 struct ttm_mem_reg *new_mem)
325 struct ttm_bo_device *bdev = bo->bdev;
326 struct ttm_mem_type_manager *man = &bdev->man[new_mem->mem_type];
327 struct ttm_tt *ttm = bo->ttm;
328 struct ttm_mem_reg *old_mem = &bo->mem;
329 struct ttm_mem_reg old_copy = *old_mem;
335 unsigned long add = 0;
338 ret = ttm_mem_reg_ioremap(bdev, old_mem, &old_iomap);
341 ret = ttm_mem_reg_ioremap(bdev, new_mem, &new_iomap);
346 * Single TTM move. NOP.
348 if (old_iomap == NULL && new_iomap == NULL)
352 * Move nonexistent data. NOP.
354 if (old_iomap == NULL && ttm == NULL)
358 * TTM might be null for moves within the same region.
360 if (ttm && ttm->state == tt_unpopulated) {
361 ret = ttm->bdev->driver->ttm_tt_populate(ttm);
369 if ((old_mem->mem_type == new_mem->mem_type) &&
370 (new_mem->start < old_mem->start + old_mem->size)) {
372 add = new_mem->num_pages - 1;
375 for (i = 0; i < new_mem->num_pages; ++i) {
376 page = i * dir + add;
377 if (old_iomap == NULL) {
378 pgprot_t prot = ttm_io_prot(old_mem->placement,
380 ret = ttm_copy_ttm_io_page(ttm, new_iomap, page,
382 } else if (new_iomap == NULL) {
383 pgprot_t prot = ttm_io_prot(new_mem->placement,
385 ret = ttm_copy_io_ttm_page(ttm, old_iomap, page,
388 ret = ttm_copy_io_page(new_iomap, old_iomap, page);
396 new_mem->mm_node = NULL;
398 if ((man->flags & TTM_MEMTYPE_FLAG_FIXED) && (ttm != NULL)) {
405 ttm_mem_reg_iounmap(bdev, old_mem, new_iomap);
407 ttm_mem_reg_iounmap(bdev, &old_copy, old_iomap);
410 * On error, keep the mm node!
413 ttm_bo_mem_put(bo, &old_copy);
416 EXPORT_SYMBOL(ttm_bo_move_memcpy);
418 static void ttm_transfered_destroy(struct ttm_buffer_object *bo)
424 * ttm_buffer_object_transfer
426 * @bo: A pointer to a struct ttm_buffer_object.
427 * @new_obj: A pointer to a pointer to a newly created ttm_buffer_object,
428 * holding the data of @bo with the old placement.
430 * This is a utility function that may be called after an accelerated move
431 * has been scheduled. A new buffer object is created as a placeholder for
432 * the old data while it's being copied. When that buffer object is idle,
433 * it can be destroyed, releasing the space of the old placement.
438 static int ttm_buffer_object_transfer(struct ttm_buffer_object *bo,
439 struct ttm_buffer_object **new_obj)
441 struct ttm_buffer_object *fbo;
442 struct ttm_bo_device *bdev = bo->bdev;
443 struct ttm_bo_driver *driver = bdev->driver;
445 fbo = kmalloc(sizeof(*fbo), GFP_KERNEL);
452 * Fix up members that we shouldn't copy directly:
453 * TODO: Explicit member copy would probably be better here.
456 init_waitqueue_head(&fbo->event_queue);
457 INIT_LIST_HEAD(&fbo->ddestroy);
458 INIT_LIST_HEAD(&fbo->lru);
459 INIT_LIST_HEAD(&fbo->swap);
460 INIT_LIST_HEAD(&fbo->io_reserve_lru);
462 atomic_set(&fbo->cpu_writers, 0);
464 spin_lock(&bdev->fence_lock);
466 fbo->sync_obj = driver->sync_obj_ref(bo->sync_obj);
468 fbo->sync_obj = NULL;
469 spin_unlock(&bdev->fence_lock);
470 kref_init(&fbo->list_kref);
471 kref_init(&fbo->kref);
472 fbo->destroy = &ttm_transfered_destroy;
479 pgprot_t ttm_io_prot(uint32_t caching_flags, pgprot_t tmp)
481 #if defined(__i386__) || defined(__x86_64__)
482 if (caching_flags & TTM_PL_FLAG_WC)
483 tmp = pgprot_writecombine(tmp);
484 else if (boot_cpu_data.x86 > 3)
485 tmp = pgprot_noncached(tmp);
487 #elif defined(__powerpc__)
488 if (!(caching_flags & TTM_PL_FLAG_CACHED)) {
489 pgprot_val(tmp) |= _PAGE_NO_CACHE;
490 if (caching_flags & TTM_PL_FLAG_UNCACHED)
491 pgprot_val(tmp) |= _PAGE_GUARDED;
494 #if defined(__ia64__)
495 if (caching_flags & TTM_PL_FLAG_WC)
496 tmp = pgprot_writecombine(tmp);
498 tmp = pgprot_noncached(tmp);
500 #if defined(__sparc__) || defined(__mips__)
501 if (!(caching_flags & TTM_PL_FLAG_CACHED))
502 tmp = pgprot_noncached(tmp);
506 EXPORT_SYMBOL(ttm_io_prot);
508 static int ttm_bo_ioremap(struct ttm_buffer_object *bo,
509 unsigned long offset,
511 struct ttm_bo_kmap_obj *map)
513 struct ttm_mem_reg *mem = &bo->mem;
515 if (bo->mem.bus.addr) {
516 map->bo_kmap_type = ttm_bo_map_premapped;
517 map->virtual = (void *)(((u8 *)bo->mem.bus.addr) + offset);
519 map->bo_kmap_type = ttm_bo_map_iomap;
520 if (mem->placement & TTM_PL_FLAG_WC)
521 map->virtual = ioremap_wc(bo->mem.bus.base + bo->mem.bus.offset + offset,
524 map->virtual = ioremap_nocache(bo->mem.bus.base + bo->mem.bus.offset + offset,
527 return (!map->virtual) ? -ENOMEM : 0;
530 static int ttm_bo_kmap_ttm(struct ttm_buffer_object *bo,
531 unsigned long start_page,
532 unsigned long num_pages,
533 struct ttm_bo_kmap_obj *map)
535 struct ttm_mem_reg *mem = &bo->mem; pgprot_t prot;
536 struct ttm_tt *ttm = bo->ttm;
541 if (ttm->state == tt_unpopulated) {
542 ret = ttm->bdev->driver->ttm_tt_populate(ttm);
547 if (num_pages == 1 && (mem->placement & TTM_PL_FLAG_CACHED)) {
549 * We're mapping a single page, and the desired
550 * page protection is consistent with the bo.
553 map->bo_kmap_type = ttm_bo_map_kmap;
554 map->page = ttm->pages[start_page];
555 map->virtual = kmap(map->page);
558 * We need to use vmap to get the desired page protection
559 * or to make the buffer object look contiguous.
561 prot = (mem->placement & TTM_PL_FLAG_CACHED) ?
563 ttm_io_prot(mem->placement, PAGE_KERNEL);
564 map->bo_kmap_type = ttm_bo_map_vmap;
565 map->virtual = vmap(ttm->pages + start_page, num_pages,
568 return (!map->virtual) ? -ENOMEM : 0;
571 int ttm_bo_kmap(struct ttm_buffer_object *bo,
572 unsigned long start_page, unsigned long num_pages,
573 struct ttm_bo_kmap_obj *map)
575 struct ttm_mem_type_manager *man =
576 &bo->bdev->man[bo->mem.mem_type];
577 unsigned long offset, size;
580 BUG_ON(!list_empty(&bo->swap));
583 if (num_pages > bo->num_pages)
585 if (start_page > bo->num_pages)
588 if (num_pages > 1 && !DRM_SUSER(DRM_CURPROC))
591 (void) ttm_mem_io_lock(man, false);
592 ret = ttm_mem_io_reserve(bo->bdev, &bo->mem);
593 ttm_mem_io_unlock(man);
596 if (!bo->mem.bus.is_iomem) {
597 return ttm_bo_kmap_ttm(bo, start_page, num_pages, map);
599 offset = start_page << PAGE_SHIFT;
600 size = num_pages << PAGE_SHIFT;
601 return ttm_bo_ioremap(bo, offset, size, map);
604 EXPORT_SYMBOL(ttm_bo_kmap);
606 void ttm_bo_kunmap(struct ttm_bo_kmap_obj *map)
608 struct ttm_buffer_object *bo = map->bo;
609 struct ttm_mem_type_manager *man =
610 &bo->bdev->man[bo->mem.mem_type];
614 switch (map->bo_kmap_type) {
615 case ttm_bo_map_iomap:
616 iounmap(map->virtual);
618 case ttm_bo_map_vmap:
619 vunmap(map->virtual);
621 case ttm_bo_map_kmap:
624 case ttm_bo_map_premapped:
629 (void) ttm_mem_io_lock(man, false);
630 ttm_mem_io_free(map->bo->bdev, &map->bo->mem);
631 ttm_mem_io_unlock(man);
635 EXPORT_SYMBOL(ttm_bo_kunmap);
637 int ttm_bo_move_accel_cleanup(struct ttm_buffer_object *bo,
641 struct ttm_mem_reg *new_mem)
643 struct ttm_bo_device *bdev = bo->bdev;
644 struct ttm_bo_driver *driver = bdev->driver;
645 struct ttm_mem_type_manager *man = &bdev->man[new_mem->mem_type];
646 struct ttm_mem_reg *old_mem = &bo->mem;
648 struct ttm_buffer_object *ghost_obj;
649 void *tmp_obj = NULL;
651 spin_lock(&bdev->fence_lock);
653 tmp_obj = bo->sync_obj;
656 bo->sync_obj = driver->sync_obj_ref(sync_obj);
658 ret = ttm_bo_wait(bo, false, false, false);
659 spin_unlock(&bdev->fence_lock);
661 driver->sync_obj_unref(&tmp_obj);
665 if ((man->flags & TTM_MEMTYPE_FLAG_FIXED) &&
667 ttm_tt_unbind(bo->ttm);
668 ttm_tt_destroy(bo->ttm);
671 ttm_bo_free_old_node(bo);
674 * This should help pipeline ordinary buffer moves.
676 * Hang old buffer memory on a new buffer object,
677 * and leave it to be released when the GPU
678 * operation has completed.
681 set_bit(TTM_BO_PRIV_FLAG_MOVING, &bo->priv_flags);
682 spin_unlock(&bdev->fence_lock);
684 driver->sync_obj_unref(&tmp_obj);
686 ret = ttm_buffer_object_transfer(bo, &ghost_obj);
691 * If we're not moving to fixed memory, the TTM object
692 * needs to stay alive. Otherwhise hang it on the ghost
693 * bo to be unbound and destroyed.
696 if (!(man->flags & TTM_MEMTYPE_FLAG_FIXED))
697 ghost_obj->ttm = NULL;
701 ttm_bo_unreserve(ghost_obj);
702 ttm_bo_unref(&ghost_obj);
706 new_mem->mm_node = NULL;
710 EXPORT_SYMBOL(ttm_bo_move_accel_cleanup);