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net: page_pool: factor out releasing DMA from releasing the page

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Releasing the DMA mapping will be useful for other types
of pages, so factor it out. Make sure compiler inlines it,
to avoid any regressions.

Signed-off-by: Mina Almasry <almasrymina@google.com>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Jakub Kicinski 2023-12-07 16:52:32 -08:00
parent 0a149ab78e
commit c3f687d8df
1 changed files with 16 additions and 9 deletions
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25
net/core/page_pool.c
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@ -548,21 +548,16 @@ s32 page_pool_inflight(const struct page_pool *pool, bool strict)
return inflight;
}
/* Disconnects a page (from a page_pool). API users can have a need
* to disconnect a page (from a page_pool), to allow it to be used as
* a regular page (that will eventually be returned to the normal
* page-allocator via put_page).
*/
static void page_pool_return_page(struct page_pool *pool, struct page *page)
static __always_inline
void __page_pool_release_page_dma(struct page_pool *pool, struct page *page)
{
dma_addr_t dma;
int count;
if (!(pool->p.flags & PP_FLAG_DMA_MAP))
/* Always account for inflight pages, even if we didn't
* map them
*/
goto skip_dma_unmap;
return;
dma = page_pool_get_dma_addr(page);
@ -571,7 +566,19 @@ static void page_pool_return_page(struct page_pool *pool, struct page *page)
PAGE_SIZE << pool->p.order, pool->p.dma_dir,
DMA_ATTR_SKIP_CPU_SYNC | DMA_ATTR_WEAK_ORDERING);
page_pool_set_dma_addr(page, 0);
skip_dma_unmap:
}
/* Disconnects a page (from a page_pool). API users can have a need
* to disconnect a page (from a page_pool), to allow it to be used as
* a regular page (that will eventually be returned to the normal
* page-allocator via put_page).
*/
void page_pool_return_page(struct page_pool *pool, struct page *page)
{
int count;
__page_pool_release_page_dma(pool, page);
page_pool_clear_pp_info(page);
/* This may be the last page returned, releasing the pool, so