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net: page_pool: add helper function for retrieving dma direction 

Since the dma direction is stored in page pool params, offer an API
helper for driver that choose not to keep track of it locally

Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
alistair/sunxi64-5.4-dsi
Ilias Apalodimas 2019-06-29 08:23:24 +03:00 committed by David S. Miller
parent 5c67bf0ec4
commit bb005f2a70
1 changed files with 9 additions and 0 deletions
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9
include/net/page_pool.h
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@ -112,6 +112,15 @@ static inline struct page *page_pool_dev_alloc_pages(struct page_pool *pool)
return page_pool_alloc_pages(pool, gfp);
}
/* get the stored dma direction. A driver might decide to treat this locally and
* avoid the extra cache line from page_pool to determine the direction
*/
static
inline enum dma_data_direction page_pool_get_dma_dir(struct page_pool *pool)
{
return pool->p.dma_dir;
}
struct page_pool *page_pool_create(const struct page_pool_params *params);
void __page_pool_free(struct page_pool *pool);