// SPDX-License-Identifier: GPL-2.0 /* Copyright (c) 2019, Vladimir Oltean <[email protected]> */ #include <linux/if_vlan.h> #include <linux/dsa/sja1105.h> #include <linux/dsa/8021q.h> #include <linux/packing.h> #include "tag.h" #include "tag_8021q.h" #define SJA1105_NAME … #define SJA1110_NAME … /* Is this a TX or an RX header? */ #define SJA1110_HEADER_HOST_TO_SWITCH … /* RX header */ #define SJA1110_RX_HEADER_IS_METADATA … #define SJA1110_RX_HEADER_HOST_ONLY … #define SJA1110_RX_HEADER_HAS_TRAILER … /* Trap-to-host format (no trailer present) */ #define SJA1110_RX_HEADER_SRC_PORT(x) … #define SJA1110_RX_HEADER_SWITCH_ID(x) … /* Timestamp format (trailer present) */ #define SJA1110_RX_HEADER_TRAILER_POS(x) … #define SJA1110_RX_TRAILER_SWITCH_ID(x) … #define SJA1110_RX_TRAILER_SRC_PORT(x) … /* Meta frame format (for 2-step TX timestamps) */ #define SJA1110_RX_HEADER_N_TS(x) … /* TX header */ #define SJA1110_TX_HEADER_UPDATE_TC … #define SJA1110_TX_HEADER_TAKE_TS … #define SJA1110_TX_HEADER_TAKE_TS_CASC … #define SJA1110_TX_HEADER_HAS_TRAILER … /* Only valid if SJA1110_TX_HEADER_HAS_TRAILER is false */ #define SJA1110_TX_HEADER_PRIO(x) … #define SJA1110_TX_HEADER_TSTAMP_ID(x) … /* Only valid if SJA1110_TX_HEADER_HAS_TRAILER is true */ #define SJA1110_TX_HEADER_TRAILER_POS(x) … #define SJA1110_TX_TRAILER_TSTAMP_ID(x) … #define SJA1110_TX_TRAILER_PRIO(x) … #define SJA1110_TX_TRAILER_SWITCHID(x) … #define SJA1110_TX_TRAILER_DESTPORTS(x) … #define SJA1110_META_TSTAMP_SIZE … #define SJA1110_HEADER_LEN … #define SJA1110_RX_TRAILER_LEN … #define SJA1110_TX_TRAILER_LEN … #define SJA1110_MAX_PADDING_LEN … struct sja1105_tagger_private { … }; static struct sja1105_tagger_private * sja1105_tagger_private(struct dsa_switch *ds) { … } /* Similar to is_link_local_ether_addr(hdr->h_dest) but also covers PTP */ static bool sja1105_is_link_local(const struct sk_buff *skb) { … } struct sja1105_meta { … }; static void sja1105_meta_unpack(const struct sk_buff *skb, struct sja1105_meta *meta) { … } static bool sja1105_is_meta_frame(const struct sk_buff *skb) { … } /* Calls sja1105_port_deferred_xmit in sja1105_main.c */ static struct sk_buff *sja1105_defer_xmit(struct dsa_port *dp, struct sk_buff *skb) { … } /* Send VLAN tags with a TPID that blends in with whatever VLAN protocol a * bridge spanning ports of this switch might have. */ static u16 sja1105_xmit_tpid(struct dsa_port *dp) { … } static struct sk_buff *sja1105_imprecise_xmit(struct sk_buff *skb, struct net_device *netdev) { … } /* Transform untagged control packets into pvid-tagged control packets so that * all packets sent by this tagger are VLAN-tagged and we can configure the * switch to drop untagged packets coming from the DSA conduit. */ static struct sk_buff *sja1105_pvid_tag_control_pkt(struct dsa_port *dp, struct sk_buff *skb, u8 pcp) { … } static struct sk_buff *sja1105_xmit(struct sk_buff *skb, struct net_device *netdev) { … } static struct sk_buff *sja1110_xmit(struct sk_buff *skb, struct net_device *netdev) { … } static void sja1105_transfer_meta(struct sk_buff *skb, const struct sja1105_meta *meta) { … } /* This is a simple state machine which follows the hardware mechanism of * generating RX timestamps: * * After each timestampable skb (all traffic for which send_meta1 and * send_meta0 is true, aka all MAC-filtered link-local traffic) a meta frame * containing a partial timestamp is immediately generated by the switch and * sent as a follow-up to the link-local frame on the CPU port. * * The meta frames have no unique identifier (such as sequence number) by which * one may pair them to the correct timestampable frame. * Instead, the switch has internal logic that ensures no frames are sent on * the CPU port between a link-local timestampable frame and its corresponding * meta follow-up. It also ensures strict ordering between ports (lower ports * have higher priority towards the CPU port). For this reason, a per-port * data structure is not needed/desirable. * * This function pairs the link-local frame with its partial timestamp from the * meta follow-up frame. The full timestamp will be reconstructed later in a * work queue. */ static struct sk_buff *sja1105_rcv_meta_state_machine(struct sk_buff *skb, struct sja1105_meta *meta, bool is_link_local, bool is_meta) { … } static bool sja1105_skb_has_tag_8021q(const struct sk_buff *skb) { … } static bool sja1110_skb_has_inband_control_extension(const struct sk_buff *skb) { … } static struct sk_buff *sja1105_rcv(struct sk_buff *skb, struct net_device *netdev) { … } static struct sk_buff *sja1110_rcv_meta(struct sk_buff *skb, u16 rx_header) { … } static struct sk_buff *sja1110_rcv_inband_control_extension(struct sk_buff *skb, int *source_port, int *switch_id, bool *host_only) { … } static struct sk_buff *sja1110_rcv(struct sk_buff *skb, struct net_device *netdev) { … } static void sja1105_flow_dissect(const struct sk_buff *skb, __be16 *proto, int *offset) { … } static void sja1110_flow_dissect(const struct sk_buff *skb, __be16 *proto, int *offset) { … } static void sja1105_disconnect(struct dsa_switch *ds) { … } static int sja1105_connect(struct dsa_switch *ds) { … } static const struct dsa_device_ops sja1105_netdev_ops = …; DSA_TAG_DRIVER(sja1105_netdev_ops); MODULE_ALIAS_DSA_TAG_DRIVER(…); static const struct dsa_device_ops sja1110_netdev_ops = …; DSA_TAG_DRIVER(sja1110_netdev_ops); MODULE_ALIAS_DSA_TAG_DRIVER(…); static struct dsa_tag_driver *sja1105_tag_driver_array[] = …; module_dsa_tag_drivers(sja1105_tag_driver_array); MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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