Some hardware (e.g: Broadcom's SYSTEMPORT) is capable of automatically
extracting and inserting a proprietary switch tag (e.g: Broadcom tag)
which saves us packet modifications when using DSA. Add the required
ethtool changes and netdevice feature bits to support such devices.
Signed-off-by: Florian Fainelli <f.faine...@gmail.com>
---
include/linux/netdev_features.h | 4 ++++
include/uapi/linux/ethtool.h | 2 ++
net/core/ethtool.c | 16 ++++++++++++++--
3 files changed, 20 insertions(+), 2 deletions(-)
diff --git a/include/linux/netdev_features.h b/include/linux/netdev_features.h
index 9672781c593d..08e00e341497 100644
--- a/include/linux/netdev_features.h
+++ b/include/linux/netdev_features.h
@@ -66,6 +66,8 @@ enum {
NETIF_F_HW_VLAN_STAG_FILTER_BIT,/* Receive filtering on VLAN STAGs */
NETIF_F_HW_L2FW_DOFFLOAD_BIT, /* Allow L2 Forwarding in Hardware */
NETIF_F_BUSY_POLL_BIT, /* Busy poll */
+ NETIF_F_HW_SWITCH_TAG_RX_BIT, /* Receive switch tag acceleration */
+ NETIF_F_HW_SWITCH_TAG_TX_BIT, /* Transmit switch tag acceleration */
/*
* Add your fresh new feature above and remember to update
@@ -124,6 +126,8 @@ enum {
#define NETIF_F_HW_VLAN_STAG_TX __NETIF_F(HW_VLAN_STAG_TX)
#define NETIF_F_HW_L2FW_DOFFLOAD __NETIF_F(HW_L2FW_DOFFLOAD)
#define NETIF_F_BUSY_POLL __NETIF_F(BUSY_POLL)
+#define NETIF_F_HW_SWITCH_TAG_RX __NETIF_F(HW_SWITCH_TAG_RX)
+#define NETIF_F_HW_SWITCH_TAG_TX __NETIF_F(HW_SWITCH_TAG_TX)
/* Features valid for ethtool to change */
/* = all defined minus driver/device-class-related */
diff --git a/include/uapi/linux/ethtool.h b/include/uapi/linux/ethtool.h
index cd1629170103..93710e249032 100644
--- a/include/uapi/linux/ethtool.h
+++ b/include/uapi/linux/ethtool.h
@@ -684,6 +684,8 @@ enum ethtool_flags {
ETH_FLAG_LRO = (1 << 15), /* LRO is enabled */
ETH_FLAG_NTUPLE = (1 << 27), /* N-tuple filters enabled */
ETH_FLAG_RXHASH = (1 << 28),
+ ETH_FLAG_RXSWITCH = (1 << 29), /* RX switch tag offload */
+ ETH_FLAG_TXSWITCH = (1 << 30), /* TX switch tag offload */
};
/* The following structures are for supporting RX network flow
diff --git a/net/core/ethtool.c b/net/core/ethtool.c
index b495ab1797fa..6f642dc4bd1d 100644
--- a/net/core/ethtool.c
+++ b/net/core/ethtool.c
@@ -98,6 +98,8 @@ static const char
netdev_features_strings[NETDEV_FEATURE_COUNT][ETH_GSTRING_LEN]
[NETIF_F_RXALL_BIT] = "rx-all",
[NETIF_F_HW_L2FW_DOFFLOAD_BIT] = "l2-fwd-offload",
[NETIF_F_BUSY_POLL_BIT] = "busy-poll",
+ [NETIF_F_HW_SWITCH_TAG_RX_BIT] = "rx-switch-tag-hw-parse",
+ [NETIF_F_HW_SWITCH_TAG_TX_BIT] = "tx-switch-tag-hw-insert",
};
static const char
@@ -298,10 +300,12 @@ static int ethtool_set_one_feature(struct net_device *dev,
}
#define ETH_ALL_FLAGS (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \
- ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH)
+ ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH | ETH_FLAG_RXSWITCH
| \
+ ETH_FLAG_TXSWITCH)
#define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \
NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \
- NETIF_F_RXHASH)
+ NETIF_F_RXHASH | NETIF_F_HW_SWITCH_TAG_RX | \
+ NETIF_F_HW_SWITCH_TAG_TX)
static u32 __ethtool_get_flags(struct net_device *dev)
{
@@ -317,6 +321,10 @@ static u32 __ethtool_get_flags(struct net_device *dev)
flags |= ETH_FLAG_NTUPLE;
if (dev->features & NETIF_F_RXHASH)
flags |= ETH_FLAG_RXHASH;
+ if (dev->features & NETIF_F_HW_SWITCH_TAG_RX)
+ flags |= ETH_FLAG_RXSWITCH;
+ if (dev->features & NETIF_F_HW_SWITCH_TAG_TX)
+ flags |= ETH_FLAG_TXSWITCH;
return flags;
}
@@ -338,6 +346,10 @@ static int __ethtool_set_flags(struct net_device *dev, u32
data)
features |= NETIF_F_NTUPLE;
if (data & ETH_FLAG_RXHASH)
features |= NETIF_F_RXHASH;
+ if (data & ETH_FLAG_RXSWITCH)
+ features |= NETIF_F_HW_SWITCH_TAG_RX;
+ if (data & ETH_FLAG_TXSWITCH)
+ features |= NETIF_F_HW_SWITCH_TAG_TX;
/* allow changing only bits set in hw_features */
changed = (features ^ dev->features) & ETH_ALL_FEATURES;
--
2.1.0
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
