/* 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 */
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
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