netdev - [PATCH net-next v2 5/5] netmem: add netmem

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Message-ID: <20241107212309.3097362-6-almasrymina@google.com>
Date: Thu,  7 Nov 2024 21:23:09 +0000
From: Mina Almasry <almasrymina@...gle.com>
To: netdev@...r.kernel.org, Jakub Kicinski <kuba@...nel.org>, 
	Mina Almasry <almasrymina@...gle.com>, Pavel Begunkov <asml.silence@...il.com>, 
	Willem de Bruijn <willemb@...gle.com>, Kaiyuan Zhang <kaiyuanz@...gle.com>, 
	Samiullah Khawaja <skhawaja@...gle.com>, linux-kernel@...r.kernel.org
Cc: "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
	Paolo Abeni <pabeni@...hat.com>, Simon Horman <horms@...nel.org>, 
	Jesper Dangaard Brouer <hawk@...nel.org>, Ilias Apalodimas <ilias.apalodimas@...aro.org>
Subject: [PATCH net-next v2 5/5] netmem: add netmem_prefetch

prefect(page) is a common thing to be called from drivers. Add
netmem_prefetch that can be called on generic netmem. Skips the prefetch
for net_iovs.

Signed-off-by: Mina Almasry <almasrymina@...gle.com>
---
 include/net/netmem.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/include/net/netmem.h b/include/net/netmem.h
index 8a6e20be4b9d..923c47147aa8 100644
--- a/include/net/netmem.h
+++ b/include/net/netmem.h
@@ -171,4 +171,11 @@ static inline unsigned long netmem_get_dma_addr(netmem_ref netmem)
 	return __netmem_clear_lsb(netmem)->dma_addr;
 }
 
+static inline void netmem_prefetch(netmem_ref netmem)
+{
+	if (netmem_is_net_iov(netmem))
+		return;
+
+	prefetch(netmem_to_page(netmem));
+}
 #endif /* _NET_NETMEM_H */
-- 
2.47.0.277.g8800431eea-goog