| /* SPDX-License-Identifier: GPL-2.0 |
| * Copyright 2019-2021 NXP |
| */ |
| |
| #ifndef _NET_DSA_TAG_OCELOT_H |
| #define _NET_DSA_TAG_OCELOT_H |
| |
| #include <linux/if_bridge.h> |
| #include <linux/if_vlan.h> |
| #include <linux/kthread.h> |
| #include <linux/packing.h> |
| #include <linux/skbuff.h> |
| #include <net/dsa.h> |
| |
| struct ocelot_skb_cb { |
| struct sk_buff *clone; |
| unsigned int ptp_class; /* valid only for clones */ |
| unsigned long ptp_tx_time; /* valid only for clones */ |
| u32 tstamp_lo; |
| u8 ptp_cmd; |
| u8 ts_id; |
| }; |
| |
| #define OCELOT_SKB_CB(skb) \ |
| ((struct ocelot_skb_cb *)((skb)->cb)) |
| |
| #define IFH_TAG_TYPE_C 0 |
| #define IFH_TAG_TYPE_S 1 |
| |
| #define IFH_REW_OP_NOOP 0x0 |
| #define IFH_REW_OP_DSCP 0x1 |
| #define IFH_REW_OP_ONE_STEP_PTP 0x2 |
| #define IFH_REW_OP_TWO_STEP_PTP 0x3 |
| #define IFH_REW_OP_ORIGIN_PTP 0x5 |
| |
| #define OCELOT_TAG_LEN 16 |
| #define OCELOT_SHORT_PREFIX_LEN 4 |
| #define OCELOT_LONG_PREFIX_LEN 16 |
| #define OCELOT_TOTAL_TAG_LEN (OCELOT_SHORT_PREFIX_LEN + OCELOT_TAG_LEN) |
| |
| /* The CPU injection header and the CPU extraction header can have 3 types of |
| * prefixes: long, short and no prefix. The format of the header itself is the |
| * same in all 3 cases. |
| * |
| * Extraction with long prefix: |
| * |
| * +-------------------+-------------------+------+------+------------+-------+ |
| * | ff:ff:ff:ff:ff:ff | fe:ff:ff:ff:ff:ff | 8880 | 000a | extraction | frame | |
| * | | | | | header | | |
| * +-------------------+-------------------+------+------+------------+-------+ |
| * 48 bits 48 bits 16 bits 16 bits 128 bits |
| * |
| * Extraction with short prefix: |
| * |
| * +------+------+------------+-------+ |
| * | 8880 | 000a | extraction | frame | |
| * | | | header | | |
| * +------+------+------------+-------+ |
| * 16 bits 16 bits 128 bits |
| * |
| * Extraction with no prefix: |
| * |
| * +------------+-------+ |
| * | extraction | frame | |
| * | header | | |
| * +------------+-------+ |
| * 128 bits |
| * |
| * |
| * Injection with long prefix: |
| * |
| * +-------------------+-------------------+------+------+------------+-------+ |
| * | any dmac | any smac | 8880 | 000a | injection | frame | |
| * | | | | | header | | |
| * +-------------------+-------------------+------+------+------------+-------+ |
| * 48 bits 48 bits 16 bits 16 bits 128 bits |
| * |
| * Injection with short prefix: |
| * |
| * +------+------+------------+-------+ |
| * | 8880 | 000a | injection | frame | |
| * | | | header | | |
| * +------+------+------------+-------+ |
| * 16 bits 16 bits 128 bits |
| * |
| * Injection with no prefix: |
| * |
| * +------------+-------+ |
| * | injection | frame | |
| * | header | | |
| * +------------+-------+ |
| * 128 bits |
| * |
| * The injection header looks like this (network byte order, bit 127 |
| * is part of lowest address byte in memory, bit 0 is part of highest |
| * address byte): |
| * |
| * +------+------+------+------+------+------+------+------+ |
| * 127:120 |BYPASS| MASQ | MASQ_PORT |REW_OP|REW_OP| |
| * +------+------+------+------+------+------+------+------+ |
| * 119:112 | REW_OP | |
| * +------+------+------+------+------+------+------+------+ |
| * 111:104 | REW_VAL | |
| * +------+------+------+------+------+------+------+------+ |
| * 103: 96 | REW_VAL | |
| * +------+------+------+------+------+------+------+------+ |
| * 95: 88 | REW_VAL | |
| * +------+------+------+------+------+------+------+------+ |
| * 87: 80 | REW_VAL | |
| * +------+------+------+------+------+------+------+------+ |
| * 79: 72 | RSV | |
| * +------+------+------+------+------+------+------+------+ |
| * 71: 64 | RSV | DEST | |
| * +------+------+------+------+------+------+------+------+ |
| * 63: 56 | DEST | |
| * +------+------+------+------+------+------+------+------+ |
| * 55: 48 | RSV | |
| * +------+------+------+------+------+------+------+------+ |
| * 47: 40 | RSV | SRC_PORT | RSV |TFRM_TIMER| |
| * +------+------+------+------+------+------+------+------+ |
| * 39: 32 | TFRM_TIMER | RSV | |
| * +------+------+------+------+------+------+------+------+ |
| * 31: 24 | RSV | DP | POP_CNT | CPUQ | |
| * +------+------+------+------+------+------+------+------+ |
| * 23: 16 | CPUQ | QOS_CLASS |TAG_TYPE| |
| * +------+------+------+------+------+------+------+------+ |
| * 15: 8 | PCP | DEI | VID | |
| * +------+------+------+------+------+------+------+------+ |
| * 7: 0 | VID | |
| * +------+------+------+------+------+------+------+------+ |
| * |
| * And the extraction header looks like this: |
| * |
| * +------+------+------+------+------+------+------+------+ |
| * 127:120 | RSV | REW_OP | |
| * +------+------+------+------+------+------+------+------+ |
| * 119:112 | REW_OP | REW_VAL | |
| * +------+------+------+------+------+------+------+------+ |
| * 111:104 | REW_VAL | |
| * +------+------+------+------+------+------+------+------+ |
| * 103: 96 | REW_VAL | |
| * +------+------+------+------+------+------+------+------+ |
| * 95: 88 | REW_VAL | |
| * +------+------+------+------+------+------+------+------+ |
| * 87: 80 | REW_VAL | LLEN | |
| * +------+------+------+------+------+------+------+------+ |
| * 79: 72 | LLEN | WLEN | |
| * +------+------+------+------+------+------+------+------+ |
| * 71: 64 | WLEN | RSV | |
| * +------+------+------+------+------+------+------+------+ |
| * 63: 56 | RSV | |
| * +------+------+------+------+------+------+------+------+ |
| * 55: 48 | RSV | |
| * +------+------+------+------+------+------+------+------+ |
| * 47: 40 | RSV | SRC_PORT | ACL_ID | |
| * +------+------+------+------+------+------+------+------+ |
| * 39: 32 | ACL_ID | RSV | SFLOW_ID | |
| * +------+------+------+------+------+------+------+------+ |
| * 31: 24 |ACL_HIT| DP | LRN_FLAGS | CPUQ | |
| * +------+------+------+------+------+------+------+------+ |
| * 23: 16 | CPUQ | QOS_CLASS |TAG_TYPE| |
| * +------+------+------+------+------+------+------+------+ |
| * 15: 8 | PCP | DEI | VID | |
| * +------+------+------+------+------+------+------+------+ |
| * 7: 0 | VID | |
| * +------+------+------+------+------+------+------+------+ |
| */ |
| |
| struct felix_deferred_xmit_work { |
| struct dsa_port *dp; |
| struct sk_buff *skb; |
| struct kthread_work work; |
| }; |
| |
| struct ocelot_8021q_tagger_data { |
| void (*xmit_work_fn)(struct kthread_work *work); |
| }; |
| |
| static inline struct ocelot_8021q_tagger_data * |
| ocelot_8021q_tagger_data(struct dsa_switch *ds) |
| { |
| BUG_ON(ds->dst->tag_ops->proto != DSA_TAG_PROTO_OCELOT_8021Q); |
| |
| return ds->tagger_data; |
| } |
| |
| static inline void ocelot_xfh_get_rew_val(void *extraction, u64 *rew_val) |
| { |
| packing(extraction, rew_val, 116, 85, OCELOT_TAG_LEN, UNPACK, 0); |
| } |
| |
| static inline void ocelot_xfh_get_len(void *extraction, u64 *len) |
| { |
| u64 llen, wlen; |
| |
| packing(extraction, &llen, 84, 79, OCELOT_TAG_LEN, UNPACK, 0); |
| packing(extraction, &wlen, 78, 71, OCELOT_TAG_LEN, UNPACK, 0); |
| |
| *len = 60 * wlen + llen - 80; |
| } |
| |
| static inline void ocelot_xfh_get_src_port(void *extraction, u64 *src_port) |
| { |
| packing(extraction, src_port, 46, 43, OCELOT_TAG_LEN, UNPACK, 0); |
| } |
| |
| static inline void ocelot_xfh_get_qos_class(void *extraction, u64 *qos_class) |
| { |
| packing(extraction, qos_class, 19, 17, OCELOT_TAG_LEN, UNPACK, 0); |
| } |
| |
| static inline void ocelot_xfh_get_tag_type(void *extraction, u64 *tag_type) |
| { |
| packing(extraction, tag_type, 16, 16, OCELOT_TAG_LEN, UNPACK, 0); |
| } |
| |
| static inline void ocelot_xfh_get_vlan_tci(void *extraction, u64 *vlan_tci) |
| { |
| packing(extraction, vlan_tci, 15, 0, OCELOT_TAG_LEN, UNPACK, 0); |
| } |
| |
| static inline void ocelot_ifh_set_bypass(void *injection, u64 bypass) |
| { |
| packing(injection, &bypass, 127, 127, OCELOT_TAG_LEN, PACK, 0); |
| } |
| |
| static inline void ocelot_ifh_set_rew_op(void *injection, u64 rew_op) |
| { |
| packing(injection, &rew_op, 125, 117, OCELOT_TAG_LEN, PACK, 0); |
| } |
| |
| static inline void ocelot_ifh_set_dest(void *injection, u64 dest) |
| { |
| packing(injection, &dest, 67, 56, OCELOT_TAG_LEN, PACK, 0); |
| } |
| |
| static inline void ocelot_ifh_set_qos_class(void *injection, u64 qos_class) |
| { |
| packing(injection, &qos_class, 19, 17, OCELOT_TAG_LEN, PACK, 0); |
| } |
| |
| static inline void seville_ifh_set_dest(void *injection, u64 dest) |
| { |
| packing(injection, &dest, 67, 57, OCELOT_TAG_LEN, PACK, 0); |
| } |
| |
| static inline void ocelot_ifh_set_src(void *injection, u64 src) |
| { |
| packing(injection, &src, 46, 43, OCELOT_TAG_LEN, PACK, 0); |
| } |
| |
| static inline void ocelot_ifh_set_tag_type(void *injection, u64 tag_type) |
| { |
| packing(injection, &tag_type, 16, 16, OCELOT_TAG_LEN, PACK, 0); |
| } |
| |
| static inline void ocelot_ifh_set_vlan_tci(void *injection, u64 vlan_tci) |
| { |
| packing(injection, &vlan_tci, 15, 0, OCELOT_TAG_LEN, PACK, 0); |
| } |
| |
| /* Determine the PTP REW_OP to use for injecting the given skb */ |
| static inline u32 ocelot_ptp_rew_op(struct sk_buff *skb) |
| { |
| struct sk_buff *clone = OCELOT_SKB_CB(skb)->clone; |
| u8 ptp_cmd = OCELOT_SKB_CB(skb)->ptp_cmd; |
| u32 rew_op = 0; |
| |
| if (ptp_cmd == IFH_REW_OP_TWO_STEP_PTP && clone) { |
| rew_op = ptp_cmd; |
| rew_op |= OCELOT_SKB_CB(clone)->ts_id << 3; |
| } else if (ptp_cmd == IFH_REW_OP_ORIGIN_PTP) { |
| rew_op = ptp_cmd; |
| } |
| |
| return rew_op; |
| } |
| |
| /** |
| * ocelot_xmit_get_vlan_info: Determine VLAN_TCI and TAG_TYPE for injected frame |
| * @skb: Pointer to socket buffer |
| * @br: Pointer to bridge device that the port is under, if any |
| * @vlan_tci: |
| * @tag_type: |
| * |
| * If the port is under a VLAN-aware bridge, remove the VLAN header from the |
| * payload and move it into the DSA tag, which will make the switch classify |
| * the packet to the bridge VLAN. Otherwise, leave the classified VLAN at zero, |
| * which is the pvid of standalone ports (OCELOT_STANDALONE_PVID), although not |
| * of VLAN-unaware bridge ports (that would be ocelot_vlan_unaware_pvid()). |
| * Anyway, VID 0 is fine because it is stripped on egress for these port modes, |
| * and source address learning is not performed for packets injected from the |
| * CPU anyway, so it doesn't matter that the VID is "wrong". |
| */ |
| static inline void ocelot_xmit_get_vlan_info(struct sk_buff *skb, |
| struct net_device *br, |
| u64 *vlan_tci, u64 *tag_type) |
| { |
| struct vlan_ethhdr *hdr; |
| u16 proto, tci; |
| |
| if (!br || !br_vlan_enabled(br)) { |
| *vlan_tci = 0; |
| *tag_type = IFH_TAG_TYPE_C; |
| return; |
| } |
| |
| hdr = (struct vlan_ethhdr *)skb_mac_header(skb); |
| br_vlan_get_proto(br, &proto); |
| |
| if (ntohs(hdr->h_vlan_proto) == proto) { |
| vlan_remove_tag(skb, &tci); |
| *vlan_tci = tci; |
| } else { |
| rcu_read_lock(); |
| br_vlan_get_pvid_rcu(br, &tci); |
| rcu_read_unlock(); |
| *vlan_tci = tci; |
| } |
| |
| *tag_type = (proto != ETH_P_8021Q) ? IFH_TAG_TYPE_S : IFH_TAG_TYPE_C; |
| } |
| |
| #endif |
