From dcf0cd1cc58b8e88793ad6531db9b3a47324ca09 Mon Sep 17 00:00:00 2001 From: George McCollister Date: Tue, 9 Feb 2021 19:02:11 -0600 Subject: 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 Reviewed-by: Vladimir Oltean Signed-off-by: David S. Miller --- net/hsr/hsr_device.c | 14 +++----------- net/hsr/hsr_device.h | 1 - net/hsr/hsr_forward.c | 27 ++++++++++++++++++++++++--- net/hsr/hsr_forward.h | 1 + net/hsr/hsr_framereg.c | 2 ++ net/hsr/hsr_main.c | 11 +++++++++++ net/hsr/hsr_main.h | 8 +------- net/hsr/hsr_slave.c | 10 ++++++---- 8 files changed, 48 insertions(+), 26 deletions(-) (limited to 'net/hsr') 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); 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 */ diff --git a/net/hsr/hsr_forward.c b/net/hsr/hsr_forward.c index d32cd87d5c5b..ed82a470b6e1 100644 --- a/net/hsr/hsr_forward.c +++ b/net/hsr/hsr_forward.c @@ -249,6 +249,8 @@ struct sk_buff *hsr_create_tagged_frame(struct hsr_frame_info *frame, /* set the lane id properly */ hsr_set_path_id(hsr_ethhdr, port); return skb_clone(frame->skb_hsr, GFP_ATOMIC); + } else if (port->dev->features & NETIF_F_HW_HSR_TAG_INS) { + return skb_clone(frame->skb_std, GFP_ATOMIC); } /* Create the new skb with enough headroom to fit the HSR tag */ @@ -291,6 +293,8 @@ struct sk_buff *prp_create_tagged_frame(struct hsr_frame_info *frame, return NULL; } return skb_clone(frame->skb_prp, GFP_ATOMIC); + } else if (port->dev->features & NETIF_F_HW_HSR_TAG_INS) { + return skb_clone(frame->skb_std, GFP_ATOMIC); } skb = skb_copy_expand(frame->skb_std, 0, @@ -343,6 +347,14 @@ bool prp_drop_frame(struct hsr_frame_info *frame, struct hsr_port *port) port->type == HSR_PT_SLAVE_A)); } +bool hsr_drop_frame(struct hsr_frame_info *frame, struct hsr_port *port) +{ + if (port->dev->features & NETIF_F_HW_HSR_FWD) + return prp_drop_frame(frame, port); + + return false; +} + /* Forward the frame through all devices except: * - Back through the receiving device * - If it's a HSR frame: through a device where it has passed before @@ -359,6 +371,7 @@ static void hsr_forward_do(struct hsr_frame_info *frame) { struct hsr_port *port; struct sk_buff *skb; + bool sent = false; hsr_for_each_port(frame->port_rcv->hsr, port) { struct hsr_priv *hsr = port->hsr; @@ -374,6 +387,12 @@ static void hsr_forward_do(struct hsr_frame_info *frame) if (port->type != HSR_PT_MASTER && frame->is_local_exclusive) continue; + /* If hardware duplicate generation is enabled, only send out + * one port. + */ + if ((port->dev->features & NETIF_F_HW_HSR_DUP) && sent) + continue; + /* Don't send frame over port where it has been sent before. * Also fro SAN, this shouldn't be done. */ @@ -405,10 +424,12 @@ static void hsr_forward_do(struct hsr_frame_info *frame) } skb->dev = port->dev; - if (port->type == HSR_PT_MASTER) + if (port->type == HSR_PT_MASTER) { hsr_deliver_master(skb, port->dev, frame->node_src); - else - hsr_xmit(skb, port, frame); + } else { + if (!hsr_xmit(skb, port, frame)) + sent = true; + } } } diff --git a/net/hsr/hsr_forward.h b/net/hsr/hsr_forward.h index 618140d484ad..b6acaafa83fc 100644 --- a/net/hsr/hsr_forward.h +++ b/net/hsr/hsr_forward.h @@ -23,6 +23,7 @@ struct sk_buff *hsr_get_untagged_frame(struct hsr_frame_info *frame, struct sk_buff *prp_get_untagged_frame(struct hsr_frame_info *frame, struct hsr_port *port); bool prp_drop_frame(struct hsr_frame_info *frame, struct hsr_port *port); +bool hsr_drop_frame(struct hsr_frame_info *frame, struct hsr_port *port); void prp_fill_frame_info(__be16 proto, struct sk_buff *skb, struct hsr_frame_info *frame); void hsr_fill_frame_info(__be16 proto, struct sk_buff *skb, diff --git a/net/hsr/hsr_framereg.c b/net/hsr/hsr_framereg.c index 5c97de459905..f9a8cc82ae2e 100644 --- a/net/hsr/hsr_framereg.c +++ b/net/hsr/hsr_framereg.c @@ -277,6 +277,8 @@ void hsr_handle_sup_frame(struct hsr_frame_info *frame) skb = frame->skb_hsr; else if (frame->skb_prp) skb = frame->skb_prp; + else if (frame->skb_std) + skb = frame->skb_std; if (!skb) return; diff --git a/net/hsr/hsr_main.c b/net/hsr/hsr_main.c index 2fd1976e5b1c..f7e284f23b1f 100644 --- a/net/hsr/hsr_main.c +++ b/net/hsr/hsr_main.c @@ -131,6 +131,17 @@ struct hsr_port *hsr_port_get_hsr(struct hsr_priv *hsr, enum hsr_port_type pt) return NULL; } +int hsr_get_version(struct net_device *dev, enum hsr_version *ver) +{ + struct hsr_priv *hsr; + + hsr = netdev_priv(dev); + *ver = hsr->prot_version; + + return 0; +} +EXPORT_SYMBOL(hsr_get_version); + static struct notifier_block hsr_nb = { .notifier_call = hsr_netdev_notify, /* Slave event notifications */ }; diff --git a/net/hsr/hsr_main.h b/net/hsr/hsr_main.h index a9c30a608e35..a169808ee78a 100644 --- a/net/hsr/hsr_main.h +++ b/net/hsr/hsr_main.h @@ -13,6 +13,7 @@ #include #include #include +#include /* Time constants as specified in the HSR specification (IEC-62439-3 2010) * Table 8. @@ -171,13 +172,6 @@ struct hsr_port { enum hsr_port_type type; }; -/* used by driver internally to differentiate various protocols */ -enum hsr_version { - HSR_V0 = 0, - HSR_V1, - PRP_V1, -}; - struct hsr_frame_info; struct hsr_node; diff --git a/net/hsr/hsr_slave.c b/net/hsr/hsr_slave.c index 36d5fcf09c61..c5227d42faf5 100644 --- a/net/hsr/hsr_slave.c +++ b/net/hsr/hsr_slave.c @@ -48,12 +48,14 @@ static rx_handler_result_t hsr_handle_frame(struct sk_buff **pskb) goto finish_consume; } - /* For HSR, only tagged frames are expected, but for PRP - * there could be non tagged frames as well from Single - * attached nodes (SANs). + /* For HSR, only tagged frames are expected (unless the device offloads + * HSR tag removal), but for PRP there could be non tagged frames as + * well from Single attached nodes (SANs). */ protocol = eth_hdr(skb)->h_proto; - if (hsr->proto_ops->invalid_dan_ingress_frame && + + if (!(port->dev->features & NETIF_F_HW_HSR_TAG_RM) && + hsr->proto_ops->invalid_dan_ingress_frame && hsr->proto_ops->invalid_dan_ingress_frame(protocol)) goto finish_pass; 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