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authorGeorge McCollister <george.mccollister@gmail.com>2021-02-10 04:02:11 +0300
committerDavid S. Miller <davem@davemloft.net>2021-02-12 00:24:44 +0300
commitdcf0cd1cc58b8e88793ad6531db9b3a47324ca09 (patch)
tree5ebcc92e853b319a9e8ab015fa01912b4b34a2aa /net/hsr/hsr_device.c
parent78be9217c4014cebac4d549cc2db1f2886d5a8fb (diff)
downloadlinux-dcf0cd1cc58b8e88793ad6531db9b3a47324ca09.tar.xz
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.c')
-rw-r--r--net/hsr/hsr_device.c14
1 files changed, 3 insertions, 11 deletions
diff --git a/net/hsr/hsr_device.c b/net/hsr/hsr_device.c
index ec6a68b403d5..7444ec6e298e 100644
--- a/net/hsr/hsr_device.c
+++ b/net/hsr/hsr_device.c
@@ -417,6 +417,7 @@ static struct hsr_proto_ops hsr_ops = {
.send_sv_frame = send_hsr_supervision_frame,
.create_tagged_frame = hsr_create_tagged_frame,
.get_untagged_frame = hsr_get_untagged_frame,
+ .drop_frame = hsr_drop_frame,
.fill_frame_info = hsr_fill_frame_info,
.invalid_dan_ingress_frame = hsr_invalid_dan_ingress_frame,
};
@@ -464,10 +465,11 @@ void hsr_dev_setup(struct net_device *dev)
/* Return true if dev is a HSR master; return false otherwise.
*/
-inline bool is_hsr_master(struct net_device *dev)
+bool is_hsr_master(struct net_device *dev)
{
return (dev->netdev_ops->ndo_start_xmit == hsr_dev_xmit);
}
+EXPORT_SYMBOL(is_hsr_master);
/* Default multicast address for HSR Supervision frames */
static const unsigned char def_multicast_addr[ETH_ALEN] __aligned(2) = {
@@ -520,16 +522,6 @@ int hsr_dev_finalize(struct net_device *hsr_dev, struct net_device *slave[2],
hsr->prot_version = protocol_version;
- /* FIXME: should I modify the value of these?
- *
- * - hsr_dev->flags - i.e.
- * IFF_MASTER/SLAVE?
- * - hsr_dev->priv_flags - i.e.
- * IFF_EBRIDGE?
- * IFF_TX_SKB_SHARING?
- * IFF_HSR_MASTER/SLAVE?
- */
-
/* Make sure the 1st call to netif_carrier_on() gets through */
netif_carrier_off(hsr_dev);