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net: page_pool: add helper function to unmap dma addresses

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On a previous patch dma addr was stored in 'struct page'.
Use that to unmap DMA addresses used by network drivers

Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ilias Apalodimas 2019-06-18 15:05:17 +02:00 committed by David S. Miller
parent 0afdeeed08
commit a25d50bfe6
2 changed files with 8 additions and 0 deletions
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1
include/net/page_pool.h
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@ -110,6 +110,7 @@ static inline struct page *page_pool_dev_alloc_pages(struct page_pool *pool)
struct page_pool *page_pool_create(const struct page_pool_params *params); struct page_pool *page_pool_create(const struct page_pool_params *params);
void page_pool_destroy(struct page_pool *pool); void page_pool_destroy(struct page_pool *pool);
void page_pool_unmap_page(struct page_pool *pool, struct page *page);
/* Never call this directly, use helpers below */ /* Never call this directly, use helpers below */
void __page_pool_put_page(struct page_pool *pool, void __page_pool_put_page(struct page_pool *pool,

7
net/core/page_pool.c
View File

@ -190,6 +190,13 @@ static void __page_pool_clean_page(struct page_pool *pool,
page->dma_addr = 0; page->dma_addr = 0;
} }
/* unmap the page and clean our state */
void page_pool_unmap_page(struct page_pool *pool, struct page *page)
{
__page_pool_clean_page(pool, page);
}
EXPORT_SYMBOL(page_pool_unmap_page);
/* Return a page to the page allocator, cleaning up our state */ /* Return a page to the page allocator, cleaning up our state */
static void __page_pool_return_page(struct page_pool *pool, struct page *page) static void __page_pool_return_page(struct page_pool *pool, struct page *page)
{ {