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/* SPDX-License-Identifier: GPL-2.0
* Copyright 2019-2021 NXP
*/
#ifndef _NET_DSA_TAG_OCELOT_H
#define _NET_DSA_TAG_OCELOT_H
#include <linux/packing.h>
#include <linux/skbuff.h>
struct ocelot_skb_cb {
struct sk_buff *clone;
unsigned int ptp_class; /* valid only for clones */
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 |
* +------+------+------+------+------+------+------+------+
*/
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_vid(void *injection, u64 vid)
{
packing(injection, &vid, 11, 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;
}
#endif
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