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Message-Id: <1306363336-13614-1-git-send-email-maheshb@google.com>
Date: Wed, 25 May 2011 15:42:16 -0700
From: Mahesh Bandewar <maheshb@...gle.com>
To: David Miller <davem@...emloft.net>
Cc: netdev <netdev@...r.kernel.org>,
Mahesh Bandewar <maheshb@...gle.com>,
Tom Herbert <therbert@...gle.com>,
Michał Mirosław <mirqus@...il.com>,
Stephen Hemminger <shemminger@...tta.com>
Subject: [PATCHv3] net: Define enum for the bits used in features.
Little bit cleanup by defining enum for all bits used. Also use those enum
values to redefine flags.
Signed-off-by: Mahesh Bandewar <maheshb@...gle.com>
---
Changes since v2:
(1) Removed the include which was part of the other patch (split mishap).
(2) Changed the enums to add NETIF_F_ prefix.
Changes since v1:
Split the patch into two pieces.
include/linux/netdevice.h | 99 +++++++++++++++++++++++++++++++--------------
1 files changed, 69 insertions(+), 30 deletions(-)
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index ca333e7..9bb5872 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -981,6 +981,49 @@ struct net_device_ops {
};
/*
+ * Net device feature bits; if you change something,
+ * also update netdev_features_strings[] in ethtool.c
+ */
+enum netdev_features {
+ NETIF_F_SG_BIT, /* Scatter/gather IO. */
+ NETIF_F_IP_CSUM_BIT, /* Can checksum TCP/UDP over IPv4. */
+ NETIF_F_NO_CSUM_BIT, /* Does not require checksum. F.e. loopack. */
+ NETIF_F_HW_CSUM_BIT, /* Can checksum all the packets. */
+ NETIF_F_IPV6_CSUM_BIT, /* Can checksum TCP/UDP over IPV6 */
+ NETIF_F_HIGHDMA_BIT, /* Can DMA to high memory. */
+ NETIF_F_FRAGLIST_BIT, /* Scatter/gather IO. */
+ NETIF_F_HW_VLAN_TX_BIT, /* Transmit VLAN hw acceleration */
+ NETIF_F_HW_VLAN_RX_BIT, /* Receive VLAN hw acceleration */
+ NETIF_F_HW_VLAN_FILTER_BIT, /* Receive filtering on VLAN */
+ NETIF_F_VLAN_CHALLENGED_BIT, /* Device cannot handle VLAN packets */
+ NETIF_F_GSO_BIT, /* Enable software GSO. */
+ NETIF_F_LLTX_BIT, /* LockLess TX - deprecated. Please */
+ /* do not use LLTX in new drivers */
+ NETIF_F_NETNS_LOCAL_BIT, /* Does not change network namespaces */
+ NETIF_F_GRO_BIT, /* Generic receive offload */
+ NETIF_F_LRO_BIT, /* large receive offload */
+ RESERVED16_BIT, /* the GSO_MASK reserved bit 16 */
+ RESERVED17_BIT, /* the GSO_MASK reserved bit 17 */
+ RESERVED18_BIT, /* the GSO_MASK reserved bit 18 */
+ RESERVED19_BIT, /* the GSO_MASK reserved bit 19 */
+ RESERVED20_BIT, /* the GSO_MASK reserved bit 20 */
+ RESERVED21_BIT, /* the GSO_MASK reserved bit 21 */
+ RESERVED22_BIT, /* the GSO_MASK reserved bit 22 */
+ RESERVED23_BIT, /* the GSO_MASK reserved bit 23 */
+ NETIF_F_FCOE_CRC_BIT, /* FCoE CRC32 */
+ NETIF_F_SCTP_CSUM_BIT, /* SCTP checksum offload */
+ NETIF_F_FCOE_MTU_BIT, /* Supports max FCoE MTU, 2158 bytes*/
+ NETIF_F_NTUPLE_BIT, /* N-tuple filters supported */
+ NETIF_F_RXHASH_BIT, /* Receive hashing offload */
+ NETIF_F_RXCSUM_BIT, /* Receive checksumming offload */
+ NETIF_F_NOCACHE_COPY_BIT, /* Use no-cache copyfromuser */
+ NETIF_F_LOOPBACK_BIT, /* Enable loopback */
+
+ /* Add you bit above this */
+ ND_FEATURE_NUM_BITS /* (LAST VALUE) Total bits in use */
+};
+
+/*
* The DEVICE structure.
* Actually, this whole structure is a big mistake. It mixes I/O
* data with strictly "high-level" data, and it has to know about
@@ -1035,36 +1078,32 @@ struct net_device {
/* mask of features inheritable by VLAN devices */
u32 vlan_features;
- /* Net device feature bits; if you change something,
- * also update netdev_features_strings[] in ethtool.c */
-
-#define NETIF_F_SG 1 /* Scatter/gather IO. */
-#define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
-#define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
-#define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
-#define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
-#define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
-#define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
-#define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
-#define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
-#define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
-#define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
-#define NETIF_F_GSO 2048 /* Enable software GSO. */
-#define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
- /* do not use LLTX in new drivers */
-#define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
-#define NETIF_F_GRO 16384 /* Generic receive offload */
-#define NETIF_F_LRO 32768 /* large receive offload */
-
-/* the GSO_MASK reserves bits 16 through 23 */
-#define NETIF_F_FCOE_CRC (1 << 24) /* FCoE CRC32 */
-#define NETIF_F_SCTP_CSUM (1 << 25) /* SCTP checksum offload */
-#define NETIF_F_FCOE_MTU (1 << 26) /* Supports max FCoE MTU, 2158 bytes*/
-#define NETIF_F_NTUPLE (1 << 27) /* N-tuple filters supported */
-#define NETIF_F_RXHASH (1 << 28) /* Receive hashing offload */
-#define NETIF_F_RXCSUM (1 << 29) /* Receive checksumming offload */
-#define NETIF_F_NOCACHE_COPY (1 << 30) /* Use no-cache copyfromuser */
-#define NETIF_F_LOOPBACK (1 << 31) /* Enable loopback */
+#define BIT2FLAG(bit) (1 << (bit))
+
+#define NETIF_F_SG BIT2FLAG(NETIF_F_SG_BIT)
+#define NETIF_F_IP_CSUM BIT2FLAG(NETIF_F_IP_CSUM_BIT)
+#define NETIF_F_NO_CSUM BIT2FLAG(NETIF_F_NO_CSUM_BIT)
+#define NETIF_F_HW_CSUM BIT2FLAG(NETIF_F_HW_CSUM_BIT)
+#define NETIF_F_IPV6_CSUM BIT2FLAG(NETIF_F_IPV6_CSUM_BIT)
+#define NETIF_F_HIGHDMA BIT2FLAG(NETIF_F_HIGHDMA_BIT)
+#define NETIF_F_FRAGLIST BIT2FLAG(NETIF_F_FRAGLIST_BIT)
+#define NETIF_F_HW_VLAN_TX BIT2FLAG(NETIF_F_HW_VLAN_TX_BIT)
+#define NETIF_F_HW_VLAN_RX BIT2FLAG(NETIF_F_HW_VLAN_RX_BIT)
+#define NETIF_F_HW_VLAN_FILTER BIT2FLAG(NETIF_F_HW_VLAN_FILTER_BIT)
+#define NETIF_F_VLAN_CHALLENGED BIT2FLAG(NETIF_F_VLAN_CHALLENGED_BIT)
+#define NETIF_F_GSO BIT2FLAG(NETIF_F_GSO_BIT)
+#define NETIF_F_LLTX BIT2FLAG(NETIF_F_LLTX_BIT)
+#define NETIF_F_NETNS_LOCAL BIT2FLAG(NETIF_F_NETNS_LOCAL_BIT)
+#define NETIF_F_GRO BIT2FLAG(NETIF_F_GRO_BIT)
+#define NETIF_F_LRO BIT2FLAG(NETIF_F_LRO_BIT)
+#define NETIF_F_FCOE_CRC BIT2FLAG(NETIF_F_FCOE_CRC_BIT)
+#define NETIF_F_SCTP_CSUM BIT2FLAG(NETIF_F_SCTP_CSUM_BIT)
+#define NETIF_F_FCOE_MTU BIT2FLAG(NETIF_F_FCOE_MTU_BIT)
+#define NETIF_F_NTUPLE BIT2FLAG(NETIF_F_NTUPLE_BIT)
+#define NETIF_F_RXHASH BIT2FLAG(NETIF_F_RXHASH_BIT)
+#define NETIF_F_RXCSUM BIT2FLAG(NETIF_F_RXCSUM_BIT)
+#define NETIF_F_NOCACHE_COPY BIT2FLAG(NETIF_F_NOCACHE_COPY_BIT)
+#define NETIF_F_LOOPBACK BIT2FLAG(NETIF_F_LOOPBACK_BIT)
/* Segmentation offload features */
#define NETIF_F_GSO_SHIFT 16
--
1.7.3.1
--
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