[PATCH v3 net-next 1/7] net: page_pool: add helper function to retrieve dma addresses

From: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org>
To: grygorii.strashko@ti.com, hawk@kernel.org, davem@davemloft.net
Cc: ast@kernel.org, linux-kernel@vger.kernel.org,
	linux-omap@vger.kernel.org, xdp-newbies@vger.kernel.org,
	ilias.apalodimas@linaro.org, netdev@vger.kernel.org,
	daniel@iogearbox.net, jakub.kicinski@netronome.com,
	john.fastabend@gmail.com,
	Jesper Dangaard Brouer <brouer@redhat.com>,
	Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org>
Subject: [PATCH v3 net-next 1/7] net: page_pool: add helper function to retrieve dma addresses
Date: Wed,  5 Jun 2019 16:20:03 +0300	[thread overview]
Message-ID: <20190605132009.10734-2-ivan.khoronzhuk@linaro.org> (raw)
In-Reply-To: <20190605132009.10734-1-ivan.khoronzhuk@linaro.org>

From: Ilias Apalodimas <ilias.apalodimas@linaro.org>

On a previous patch dma addr was stored in 'struct page'.
Use that to retrieve 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: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org>
---
 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 694d055e01ef..b885d86cb7a1 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
-- 
2.17.1

