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| author | George McCollister <george.mccollister@gmail.com> | 2021-02-09 19:02:11 -0600 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-02-11 13:24:44 -0800 |
| commit | dcf0cd1cc58b8e88793ad6531db9b3a47324ca09 (patch) | |
| tree | 5ebcc92e853b319a9e8ab015fa01912b4b34a2aa /include | |
| parent | 78be9217c4014cebac4d549cc2db1f2886d5a8fb (diff) | |
| download | linux-dcf0cd1cc58b8e88793ad6531db9b3a47324ca09.tar.gz | |
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 'include')
| -rw-r--r-- | include/linux/if_hsr.h | 27 | ||||
| -rw-r--r-- | include/linux/netdev_features.h | 9 |
2 files changed, 36 insertions, 0 deletions
diff --git a/include/linux/if_hsr.h b/include/linux/if_hsr.h new file mode 100644 index 000000000000..38bbc537d4e4 --- /dev/null +++ b/include/linux/if_hsr.h @@ -0,0 +1,27 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _LINUX_IF_HSR_H_ +#define _LINUX_IF_HSR_H_ + +/* used to differentiate various protocols */ +enum hsr_version { + HSR_V0 = 0, + HSR_V1, + PRP_V1, +}; + +#if IS_ENABLED(CONFIG_HSR) +extern bool is_hsr_master(struct net_device *dev); +extern int hsr_get_version(struct net_device *dev, enum hsr_version *ver); +#else +static inline bool is_hsr_master(struct net_device *dev) +{ + return false; +} +static inline int hsr_get_version(struct net_device *dev, + enum hsr_version *ver) +{ + return -EINVAL; +} +#endif /* CONFIG_HSR */ + +#endif /*_LINUX_IF_HSR_H_*/ diff --git a/include/linux/netdev_features.h b/include/linux/netdev_features.h index c06d6aaba9df..3de38d6a0aea 100644 --- a/include/linux/netdev_features.h +++ b/include/linux/netdev_features.h @@ -86,6 +86,11 @@ enum { NETIF_F_HW_MACSEC_BIT, /* Offload MACsec operations */ NETIF_F_GRO_UDP_FWD_BIT, /* Allow UDP GRO for forwarding */ + NETIF_F_HW_HSR_TAG_INS_BIT, /* Offload HSR tag insertion */ + NETIF_F_HW_HSR_TAG_RM_BIT, /* Offload HSR tag removal */ + NETIF_F_HW_HSR_FWD_BIT, /* Offload HSR forwarding */ + NETIF_F_HW_HSR_DUP_BIT, /* Offload HSR duplication */ + /* * Add your fresh new feature above and remember to update * netdev_features_strings[] in net/core/ethtool.c and maybe @@ -159,6 +164,10 @@ enum { #define NETIF_F_GSO_FRAGLIST __NETIF_F(GSO_FRAGLIST) #define NETIF_F_HW_MACSEC __NETIF_F(HW_MACSEC) #define NETIF_F_GRO_UDP_FWD __NETIF_F(GRO_UDP_FWD) +#define NETIF_F_HW_HSR_TAG_INS __NETIF_F(HW_HSR_TAG_INS) +#define NETIF_F_HW_HSR_TAG_RM __NETIF_F(HW_HSR_TAG_RM) +#define NETIF_F_HW_HSR_FWD __NETIF_F(HW_HSR_FWD) +#define NETIF_F_HW_HSR_DUP __NETIF_F(HW_HSR_DUP) /* Finds the next feature with the highest number of the range of start till 0. */ |