diff options
Diffstat (limited to 'drivers/gpu/drm/ttm/ttm_tt.c')
| -rw-r--r-- | drivers/gpu/drm/ttm/ttm_tt.c | 47 |
1 files changed, 46 insertions, 1 deletions
diff --git a/drivers/gpu/drm/ttm/ttm_tt.c b/drivers/gpu/drm/ttm/ttm_tt.c index 539e0232cb3b..24031a8acd2d 100644 --- a/drivers/gpu/drm/ttm/ttm_tt.c +++ b/drivers/gpu/drm/ttm/ttm_tt.c @@ -415,7 +415,7 @@ DEFINE_SHOW_ATTRIBUTE(ttm_tt_debugfs_shrink); #endif -/** +/* * ttm_tt_mgr_init - register with the MM shrinker * * Register with the MM shrinker for swapping out BOs. @@ -433,3 +433,48 @@ void ttm_tt_mgr_init(unsigned long num_pages, unsigned long num_dma32_pages) if (!ttm_dma32_pages_limit) ttm_dma32_pages_limit = num_dma32_pages; } + +static void ttm_kmap_iter_tt_map_local(struct ttm_kmap_iter *iter, + struct dma_buf_map *dmap, + pgoff_t i) +{ + struct ttm_kmap_iter_tt *iter_tt = + container_of(iter, typeof(*iter_tt), base); + + dma_buf_map_set_vaddr(dmap, kmap_local_page_prot(iter_tt->tt->pages[i], + iter_tt->prot)); +} + +static void ttm_kmap_iter_tt_unmap_local(struct ttm_kmap_iter *iter, + struct dma_buf_map *map) +{ + kunmap_local(map->vaddr); +} + +static const struct ttm_kmap_iter_ops ttm_kmap_iter_tt_ops = { + .map_local = ttm_kmap_iter_tt_map_local, + .unmap_local = ttm_kmap_iter_tt_unmap_local, + .maps_tt = true, +}; + +/** + * ttm_kmap_iter_tt_init - Initialize a struct ttm_kmap_iter_tt + * @iter_tt: The struct ttm_kmap_iter_tt to initialize. + * @tt: Struct ttm_tt holding page pointers of the struct ttm_resource. + * + * Return: Pointer to the embedded struct ttm_kmap_iter. + */ +struct ttm_kmap_iter * +ttm_kmap_iter_tt_init(struct ttm_kmap_iter_tt *iter_tt, + struct ttm_tt *tt) +{ + iter_tt->base.ops = &ttm_kmap_iter_tt_ops; + iter_tt->tt = tt; + if (tt) + iter_tt->prot = ttm_prot_from_caching(tt->caching, PAGE_KERNEL); + else + iter_tt->prot = PAGE_KERNEL; + + return &iter_tt->base; +} +EXPORT_SYMBOL(ttm_kmap_iter_tt_init); |