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From: Jesper Dangaard Brouer <brouer@redhat.com>
To: netdev@vger.kernel.org,
	"Ilias Apalodimas" <ilias.apalodimas@linaro.org>,
	"Toke Høiland-Jørgensen" <toke@toke.dk>,
	"Tariq Toukan" <tariqt@mellanox.com>,
	"Jesper Dangaard Brouer" <brouer@redhat.com>
Cc: toshiaki.makita1@gmail.com, grygorii.strashko@ti.com,
	ivan.khoronzhuk@linaro.org, mcroce@redhat.com
Subject: [PATCH net-next v2 02/12] net: page_pool: add helper function to unmap dma addresses
Date: Tue, 18 Jun 2019 15:05:17 +0200
Message-ID: <156086311744.27760.5417231838560145863.stgit@firesoul> (raw)
In-Reply-To: <156086304827.27760.11339786046465638081.stgit@firesoul>

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

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>
---
 include/net/page_pool.h |    1 +
 net/core/page_pool.c    |    7 +++++++
 2 files changed, 8 insertions(+)

diff --git a/include/net/page_pool.h b/include/net/page_pool.h
index b885d86cb7a1..ad218cef88c5 100644
--- a/include/net/page_pool.h
+++ b/include/net/page_pool.h
@@ -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);
 
 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,
diff --git a/net/core/page_pool.c b/net/core/page_pool.c
index 5b2252c6d49b..205af7bd6d09 100644
--- a/net/core/page_pool.c
+++ b/net/core/page_pool.c
@@ -190,6 +190,13 @@ static void __page_pool_clean_page(struct page_pool *pool,
 	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 */
 static void __page_pool_return_page(struct page_pool *pool, struct page *page)
 {


  parent reply index

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-18 13:05 [PATCH net-next v2 00/12] xdp: page_pool fixes and in-flight accounting Jesper Dangaard Brouer
2019-06-18 13:05 ` [PATCH net-next v2 01/12] net: page_pool: add helper function to retrieve dma addresses Jesper Dangaard Brouer
2019-06-18 13:05 ` Jesper Dangaard Brouer [this message]
2019-06-18 13:05 ` [PATCH net-next v2 03/12] xdp: fix leak of IDA cyclic id if rhashtable_insert_slow fails Jesper Dangaard Brouer
2019-06-18 13:05 ` [PATCH net-next v2 04/12] xdp: page_pool related fix to cpumap Jesper Dangaard Brouer
2019-06-18 13:05 ` [PATCH net-next v2 05/12] veth: use xdp_release_frame for XDP_PASS Jesper Dangaard Brouer
2019-06-18 13:05 ` [PATCH net-next v2 06/12] page_pool: introduce page_pool_free and use in mlx5 Jesper Dangaard Brouer
2019-06-18 13:05 ` [PATCH net-next v2 07/12] mlx5: more strict use of page_pool API Jesper Dangaard Brouer
2019-06-18 13:05 ` [PATCH net-next v2 08/12] xdp: tracking page_pool resources and safe removal Jesper Dangaard Brouer
2019-06-25 10:50   ` Ivan Khoronzhuk
2019-06-25 11:27     ` Jesper Dangaard Brouer
2019-06-25 11:51       ` Ivan Khoronzhuk
2019-06-25 12:28         ` Ivan Khoronzhuk
2019-06-18 13:05 ` [PATCH net-next v2 09/12] xdp: force mem allocator removal and periodic warning Jesper Dangaard Brouer
2019-06-18 13:05 ` [PATCH net-next v2 10/12] xdp: add tracepoints for XDP mem Jesper Dangaard Brouer
2019-06-18 13:06 ` [PATCH net-next v2 11/12] page_pool: add tracepoints for page_pool with details need by XDP Jesper Dangaard Brouer
2019-06-18 13:06 ` [PATCH net-next v2 12/12] page_pool: make sure struct device is stable Jesper Dangaard Brouer
2019-06-19 15:24 ` [PATCH net-next v2 00/12] xdp: page_pool fixes and in-flight accounting David Miller

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