The page_pool API has no users for it's DMA capabilities yet.
Retrieving DMA addresses used by network drivers will be needed for real
users.
commit 1567b85eb8ad ("net: page_pool: don't use page->private to store
dma_addr_t")
uses 'struct page' to store the addresses.
This patch provides a helper for retrieving them.
Signed-off-by: Ilias Apalodimas <ilias.apalodi...@linaro.org>
Signed-off-by: Jesper Dangaard Brouer <bro...@redhat.com>
---
include/net/page_pool.h | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/include/net/page_pool.h b/include/net/page_pool.h
index 694d055..b885d86 100644
--- a/include/net/page_pool.h
+++ b/include/net/page_pool.h
@@ -132,6 +132,11 @@ static inline void page_pool_recycle_direct(struct
page_pool *pool,
__page_pool_put_page(pool, page, true);
}
+static inline dma_addr_t page_pool_get_dma_addr(struct page *page)
+{
+ return page->dma_addr;
+}
+
static inline bool is_page_pool_compiled_in(void)
{
#ifdef CONFIG_PAGE_POOL
--
2.7.4
