netdev - [PATCH net-next v10 05/22] net: page pool: export page_pool_set_dma_addr

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Message-ID: <20250108220644.3528845-6-dw@davidwei.uk>
Date: Wed,  8 Jan 2025 14:06:26 -0800
From: David Wei <dw@...idwei.uk>
To: io-uring@...r.kernel.org,
	netdev@...r.kernel.org
Cc: Jens Axboe <axboe@...nel.dk>,
	Pavel Begunkov <asml.silence@...il.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jesper Dangaard Brouer <hawk@...nel.org>,
	David Ahern <dsahern@...nel.org>,
	Mina Almasry <almasrymina@...gle.com>,
	Stanislav Fomichev <stfomichev@...il.com>,
	Joe Damato <jdamato@...tly.com>,
	Pedro Tammela <pctammela@...atatu.com>
Subject: [PATCH net-next v10 05/22] net: page pool: export page_pool_set_dma_addr_netmem()

Export page_pool_set_dma_addr_netmem() in page_pool/helpers.h. This is
needed by memory provider implementations that are outside of net/ to be
able to set the dma addrs on net_iovs during alloc/free.

Signed-off-by: David Wei <dw@...idwei.uk>
---
 include/net/page_pool/helpers.h | 10 ++++++++++
 net/core/page_pool.c            | 16 ++++++++++++++++
 net/core/page_pool_priv.h       | 17 -----------------
 3 files changed, 26 insertions(+), 17 deletions(-)

diff --git a/include/net/page_pool/helpers.h b/include/net/page_pool/helpers.h
index 582a3d00cbe2..4ecd45646c77 100644
--- a/include/net/page_pool/helpers.h
+++ b/include/net/page_pool/helpers.h
@@ -492,4 +492,14 @@ static inline void page_pool_nid_changed(struct page_pool *pool, int new_nid)
 		page_pool_update_nid(pool, new_nid);
 }
 
+#if defined(CONFIG_PAGE_POOL)
+bool page_pool_set_dma_addr_netmem(netmem_ref netmem, dma_addr_t addr);
+#else
+static inline bool page_pool_set_dma_addr_netmem(netmem_ref netmem,
+						 dma_addr_t addr)
+{
+	return false;
+}
+#endif
+
 #endif /* _NET_PAGE_POOL_HELPERS_H */
diff --git a/net/core/page_pool.c b/net/core/page_pool.c
index 9733206d6406..fc3a04823087 100644
--- a/net/core/page_pool.c
+++ b/net/core/page_pool.c
@@ -649,6 +649,22 @@ void page_pool_clear_pp_info(netmem_ref netmem)
 	netmem_set_pp(netmem, NULL);
 }
 
+bool page_pool_set_dma_addr_netmem(netmem_ref netmem, dma_addr_t addr)
+{
+	if (PAGE_POOL_32BIT_ARCH_WITH_64BIT_DMA) {
+		netmem_set_dma_addr(netmem, addr >> PAGE_SHIFT);
+
+		/* We assume page alignment to shave off bottom bits,
+		 * if this "compression" doesn't work we need to drop.
+		 */
+		return addr != (dma_addr_t)netmem_get_dma_addr(netmem)
+				       << PAGE_SHIFT;
+	}
+
+	netmem_set_dma_addr(netmem, addr);
+	return false;
+}
+
 static __always_inline void __page_pool_release_page_dma(struct page_pool *pool,
 							 netmem_ref netmem)
 {
diff --git a/net/core/page_pool_priv.h b/net/core/page_pool_priv.h
index 57439787b9c2..fda9c59ee283 100644
--- a/net/core/page_pool_priv.h
+++ b/net/core/page_pool_priv.h
@@ -13,23 +13,6 @@ int page_pool_list(struct page_pool *pool);
 void page_pool_detached(struct page_pool *pool);
 void page_pool_unlist(struct page_pool *pool);
 
-static inline bool
-page_pool_set_dma_addr_netmem(netmem_ref netmem, dma_addr_t addr)
-{
-	if (PAGE_POOL_32BIT_ARCH_WITH_64BIT_DMA) {
-		netmem_set_dma_addr(netmem, addr >> PAGE_SHIFT);
-
-		/* We assume page alignment to shave off bottom bits,
-		 * if this "compression" doesn't work we need to drop.
-		 */
-		return addr != (dma_addr_t)netmem_get_dma_addr(netmem)
-				       << PAGE_SHIFT;
-	}
-
-	netmem_set_dma_addr(netmem, addr);
-	return false;
-}
-
 static inline bool page_pool_set_dma_addr(struct page *page, dma_addr_t addr)
 {
 	return page_pool_set_dma_addr_netmem(page_to_netmem(page), addr);
-- 
2.43.5