diff options
| -rw-r--r-- | MAINTAINERS | 1 | ||||
| -rw-r--r-- | drivers/net/dsa/ocelot/Kconfig | 2 | ||||
| -rw-r--r-- | include/net/dsa.h | 2 | ||||
| -rw-r--r-- | net/dsa/Kconfig | 21 | ||||
| -rw-r--r-- | net/dsa/Makefile | 1 | ||||
| -rw-r--r-- | net/dsa/tag_ocelot_8021q.c | 68 |
6 files changed, 92 insertions, 3 deletions
diff --git a/MAINTAINERS b/MAINTAINERS index 627e90a9e2961..d1b0057a97970 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -12859,6 +12859,7 @@ F: drivers/net/dsa/ocelot/* F: drivers/net/ethernet/mscc/ F: include/soc/mscc/ocelot* F: net/dsa/tag_ocelot.c +F: net/dsa/tag_ocelot_8021q.c F: tools/testing/selftests/drivers/net/ocelot/* OCXL (Open Coherent Accelerator Processor Interface OpenCAPI) DRIVER diff --git a/drivers/net/dsa/ocelot/Kconfig b/drivers/net/dsa/ocelot/Kconfig index c110e82a79737..932b6b6fe817f 100644 --- a/drivers/net/dsa/ocelot/Kconfig +++ b/drivers/net/dsa/ocelot/Kconfig @@ -6,6 +6,7 @@ config NET_DSA_MSCC_FELIX depends on NET_VENDOR_FREESCALE depends on HAS_IOMEM select MSCC_OCELOT_SWITCH_LIB + select NET_DSA_TAG_OCELOT_8021Q select NET_DSA_TAG_OCELOT select FSL_ENETC_MDIO select PCS_LYNX @@ -19,6 +20,7 @@ config NET_DSA_MSCC_SEVILLE depends on NET_VENDOR_MICROSEMI depends on HAS_IOMEM select MSCC_OCELOT_SWITCH_LIB + select NET_DSA_TAG_OCELOT_8021Q select NET_DSA_TAG_OCELOT select PCS_LYNX help diff --git a/include/net/dsa.h b/include/net/dsa.h index 7ea3918b2e618..60acb9fca124e 100644 --- a/include/net/dsa.h +++ b/include/net/dsa.h @@ -47,6 +47,7 @@ struct phylink_link_state; #define DSA_TAG_PROTO_RTL4_A_VALUE 17 #define DSA_TAG_PROTO_HELLCREEK_VALUE 18 #define DSA_TAG_PROTO_XRS700X_VALUE 19 +#define DSA_TAG_PROTO_OCELOT_8021Q_VALUE 20 enum dsa_tag_protocol { DSA_TAG_PROTO_NONE = DSA_TAG_PROTO_NONE_VALUE, @@ -69,6 +70,7 @@ enum dsa_tag_protocol { DSA_TAG_PROTO_RTL4_A = DSA_TAG_PROTO_RTL4_A_VALUE, DSA_TAG_PROTO_HELLCREEK = DSA_TAG_PROTO_HELLCREEK_VALUE, DSA_TAG_PROTO_XRS700X = DSA_TAG_PROTO_XRS700X_VALUE, + DSA_TAG_PROTO_OCELOT_8021Q = DSA_TAG_PROTO_OCELOT_8021Q_VALUE, }; struct packet_type; diff --git a/net/dsa/Kconfig b/net/dsa/Kconfig index 2d226a5c085fb..a45572cfb71a7 100644 --- a/net/dsa/Kconfig +++ b/net/dsa/Kconfig @@ -105,11 +105,26 @@ config NET_DSA_TAG_RTL4_A the Realtek RTL8366RB. config NET_DSA_TAG_OCELOT - tristate "Tag driver for Ocelot family of switches" + tristate "Tag driver for Ocelot family of switches, using NPI port" select PACKING help - Say Y or M if you want to enable support for tagging frames for the - Ocelot switches (VSC7511, VSC7512, VSC7513, VSC7514, VSC9959). + Say Y or M if you want to enable NPI tagging for the Ocelot switches + (VSC7511, VSC7512, VSC7513, VSC7514, VSC9953, VSC9959). In this mode, + the frames over the Ethernet CPU port are prepended with a + hardware-defined injection/extraction frame header. Flow control + (PAUSE frames) over the CPU port is not supported when operating in + this mode. + +config NET_DSA_TAG_OCELOT_8021Q + tristate "Tag driver for Ocelot family of switches, using VLAN" + select NET_DSA_TAG_8021Q + help + Say Y or M if you want to enable support for tagging frames with a + custom VLAN-based header. Frames that require timestamping, such as + PTP, are not delivered over Ethernet but over register-based MMIO. + Flow control over the CPU port is functional in this mode. When using + this mode, less TCAM resources (VCAP IS1, IS2, ES0) are available for + use with tc-flower. config NET_DSA_TAG_QCA tristate "Tag driver for Qualcomm Atheros QCA8K switches" diff --git a/net/dsa/Makefile b/net/dsa/Makefile index 92cea21322415..44bc79952b8b8 100644 --- a/net/dsa/Makefile +++ b/net/dsa/Makefile @@ -15,6 +15,7 @@ obj-$(CONFIG_NET_DSA_TAG_RTL4_A) += tag_rtl4_a.o obj-$(CONFIG_NET_DSA_TAG_LAN9303) += tag_lan9303.o obj-$(CONFIG_NET_DSA_TAG_MTK) += tag_mtk.o obj-$(CONFIG_NET_DSA_TAG_OCELOT) += tag_ocelot.o +obj-$(CONFIG_NET_DSA_TAG_OCELOT_8021Q) += tag_ocelot_8021q.o obj-$(CONFIG_NET_DSA_TAG_QCA) += tag_qca.o obj-$(CONFIG_NET_DSA_TAG_SJA1105) += tag_sja1105.o obj-$(CONFIG_NET_DSA_TAG_TRAILER) += tag_trailer.o diff --git a/net/dsa/tag_ocelot_8021q.c b/net/dsa/tag_ocelot_8021q.c new file mode 100644 index 0000000000000..8991ebf098a31 --- /dev/null +++ b/net/dsa/tag_ocelot_8021q.c @@ -0,0 +1,68 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright 2020-2021 NXP Semiconductors + * + * An implementation of the software-defined tag_8021q.c tagger format, which + * also preserves full functionality under a vlan_filtering bridge. It does + * this by using the TCAM engines for: + * - pushing the RX VLAN as a second, outer tag, on egress towards the CPU port + * - redirecting towards the correct front port based on TX VLAN and popping + * that on egress + */ +#include <linux/dsa/8021q.h> +#include "dsa_priv.h" + +static struct sk_buff *ocelot_xmit(struct sk_buff *skb, + struct net_device *netdev) +{ + struct dsa_port *dp = dsa_slave_to_port(netdev); + u16 tx_vid = dsa_8021q_tx_vid(dp->ds, dp->index); + u16 queue_mapping = skb_get_queue_mapping(skb); + u8 pcp = netdev_txq_to_tc(netdev, queue_mapping); + + return dsa_8021q_xmit(skb, netdev, ETH_P_8021Q, + ((pcp << VLAN_PRIO_SHIFT) | tx_vid)); +} + +static struct sk_buff *ocelot_rcv(struct sk_buff *skb, + struct net_device *netdev, + struct packet_type *pt) +{ + int src_port, switch_id, qos_class; + u16 vid, tci; + + skb_push_rcsum(skb, ETH_HLEN); + if (skb_vlan_tag_present(skb)) { + tci = skb_vlan_tag_get(skb); + __vlan_hwaccel_clear_tag(skb); + } else { + __skb_vlan_pop(skb, &tci); + } + skb_pull_rcsum(skb, ETH_HLEN); + + vid = tci & VLAN_VID_MASK; + src_port = dsa_8021q_rx_source_port(vid); + switch_id = dsa_8021q_rx_switch_id(vid); + qos_class = (tci & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT; + + skb->dev = dsa_master_find_slave(netdev, switch_id, src_port); + if (!skb->dev) + return NULL; + + skb->offload_fwd_mark = 1; + skb->priority = qos_class; + + return skb; +} + +static const struct dsa_device_ops ocelot_8021q_netdev_ops = { + .name = "ocelot-8021q", + .proto = DSA_TAG_PROTO_OCELOT_8021Q, + .xmit = ocelot_xmit, + .rcv = ocelot_rcv, + .overhead = VLAN_HLEN, +}; + +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS_DSA_TAG_DRIVER(DSA_TAG_PROTO_OCELOT_8021Q); + +module_dsa_tag_driver(ocelot_8021q_netdev_ops); |