From: Ilias Apalodimas <ilias.apalodi...@linaro.org>
Add helper functions for retreiving dma_addr_t stored in page_private and
unmapping dma addresses, mapped via the page_pool API.
Signed-off-by: Ilias Apalodimas <ilias.apalodi...@linaro.org>
Signed-off-by: Jesper Dangaard Brouer <bro...@redhat.com>
---
include/net/page_pool.h | 6 ++++++
net/core/page_pool.c | 7 +++++++
2 files changed, 13 insertions(+)
diff --git a/include/net/page_pool.h b/include/net/page_pool.h
index 694d055e01ef..439f9183d4cd 100644
--- a/include/net/page_pool.h
+++ b/include/net/page_pool.h
@@ -111,6 +111,8 @@ struct page_pool *page_pool_create(const struct
page_pool_params *params);
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 */
void __page_pool_put_page(struct page_pool *pool,
struct page *page, bool allow_direct);
@@ -141,4 +143,8 @@ static inline bool is_page_pool_compiled_in(void)
#endif
}
+static inline dma_addr_t page_pool_get_dma_addr(struct page *page)
+{
+ return page_private(page);
+}
#endif /* _NET_PAGE_POOL_H */
diff --git a/net/core/page_pool.c b/net/core/page_pool.c
index 43a932cb609b..26e14a17a67c 100644
--- a/net/core/page_pool.c
+++ b/net/core/page_pool.c
@@ -184,6 +184,13 @@ static void __page_pool_clean_page(struct page_pool *pool,
set_page_private(page, 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 */
static void __page_pool_return_page(struct page_pool *pool, struct page *page)
{
