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authorGeorge McCollister <george.mccollister@gmail.com>2021-02-09 19:02:11 -0600
committerDavid S. Miller <davem@davemloft.net>2021-02-11 13:24:44 -0800
commitdcf0cd1cc58b8e88793ad6531db9b3a47324ca09 (patch)
tree5ebcc92e853b319a9e8ab015fa01912b4b34a2aa /net/hsr/hsr_device.h
parent78be9217c4014cebac4d549cc2db1f2886d5a8fb (diff)
net: hsr: add offloading support
Add support for offloading of HSR/PRP (IEC 62439-3) tag insertion tag removal, duplicate generation and forwarding. For HSR, insertion involves the switch adding a 6 byte HSR header after the 14 byte Ethernet header. For PRP it adds a 6 byte trailer. Tag removal involves automatically stripping the HSR/PRP header/trailer in the switch. This is possible when the switch also performs auto deduplication using the HSR/PRP header/trailer (making it no longer required). Forwarding involves automatically forwarding between redundant ports in an HSR. This is crucial because delay is accumulated as a frame passes through each node in the ring. Duplication involves the switch automatically sending a single frame from the CPU port to both redundant ports. This is required because the inserted HSR/PRP header/trailer must contain the same sequence number on the frames sent out both redundant ports. Export is_hsr_master so DSA can tell them apart from other devices in dsa_slave_changeupper. Signed-off-by: George McCollister <george.mccollister@gmail.com> Reviewed-by: Vladimir Oltean <olteanv@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/hsr/hsr_device.h')
-rw-r--r--net/hsr/hsr_device.h1
1 files changed, 0 insertions, 1 deletions
diff --git a/net/hsr/hsr_device.h b/net/hsr/hsr_device.h
index 868373822ee4..9060c92168f9 100644
--- a/net/hsr/hsr_device.h
+++ b/net/hsr/hsr_device.h
@@ -19,6 +19,5 @@ int hsr_dev_finalize(struct net_device *hsr_dev, struct net_device *slave[2],
unsigned char multicast_spec, u8 protocol_version,
struct netlink_ext_ack *extack);
void hsr_check_carrier_and_operstate(struct hsr_priv *hsr);
-bool is_hsr_master(struct net_device *dev);
int hsr_get_max_mtu(struct hsr_priv *hsr);
#endif /* __HSR_DEVICE_H */