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dcf0cd1cc5
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>
27 lines
586 B
C
27 lines
586 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_IF_HSR_H_
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#define _LINUX_IF_HSR_H_
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/* used to differentiate various protocols */
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enum hsr_version {
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HSR_V0 = 0,
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HSR_V1,
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PRP_V1,
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};
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#if IS_ENABLED(CONFIG_HSR)
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extern bool is_hsr_master(struct net_device *dev);
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extern int hsr_get_version(struct net_device *dev, enum hsr_version *ver);
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#else
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static inline bool is_hsr_master(struct net_device *dev)
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{
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return false;
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}
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static inline int hsr_get_version(struct net_device *dev,
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enum hsr_version *ver)
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{
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return -EINVAL;
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}
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#endif /* CONFIG_HSR */
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#endif /*_LINUX_IF_HSR_H_*/
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