[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <1303328648.19336.24.camel@localhost.localdomain>
Date: Wed, 20 Apr 2011 12:44:08 -0700
From: Shirley Ma <mashirle@...ibm.com>
To: David Miller <davem@...emloft.net>
Cc: mst@...hat.com, Eric Dumazet <eric.dumazet@...il.com>,
Avi Kivity <avi@...hat.com>, Arnd Bergmann <arnd@...db.de>,
netdev@...r.kernel.org, kvm@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH V3 2/8] Add a new zerocopy device flag
This zerocopy flag is used to support device DMA userspace buffers.
Signed-off-by: Shirley Ma <xma@...ibm.com>
---
include/linux/netdevice.h | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 0249fe7..0998d3d 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1067,6 +1067,9 @@ struct net_device {
#define NETIF_F_RXHASH (1 << 28) /* Receive hashing offload */
#define NETIF_F_RXCSUM (1 << 29) /* Receive checksumming offload */
+/* bit 29 is for device to map userspace buffers -- zerocopy */
+#define NETIF_F_ZEROCOPY (1 << 29)
+
/* Segmentation offload features */
#define NETIF_F_GSO_SHIFT 16
#define NETIF_F_GSO_MASK 0x00ff0000
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Powered by blists - more mailing lists