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net: page_pool: add helper function for retrieving dma direction

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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>
This commit is contained in:
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);