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269 lines
11 KiB
C
269 lines
11 KiB
C
/* SPDX-License-Identifier: GPL-2.0
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* Copyright 2019-2021 NXP
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*/
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#ifndef _NET_DSA_TAG_OCELOT_H
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#define _NET_DSA_TAG_OCELOT_H
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#include <linux/kthread.h>
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#include <linux/packing.h>
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#include <linux/skbuff.h>
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struct ocelot_skb_cb {
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struct sk_buff *clone;
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unsigned int ptp_class; /* valid only for clones */
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u32 tstamp_lo;
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u8 ptp_cmd;
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u8 ts_id;
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};
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#define OCELOT_SKB_CB(skb) \
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((struct ocelot_skb_cb *)((skb)->cb))
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#define IFH_TAG_TYPE_C 0
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#define IFH_TAG_TYPE_S 1
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#define IFH_REW_OP_NOOP 0x0
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#define IFH_REW_OP_DSCP 0x1
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#define IFH_REW_OP_ONE_STEP_PTP 0x2
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#define IFH_REW_OP_TWO_STEP_PTP 0x3
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#define IFH_REW_OP_ORIGIN_PTP 0x5
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#define OCELOT_TAG_LEN 16
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#define OCELOT_SHORT_PREFIX_LEN 4
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#define OCELOT_LONG_PREFIX_LEN 16
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#define OCELOT_TOTAL_TAG_LEN (OCELOT_SHORT_PREFIX_LEN + OCELOT_TAG_LEN)
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/* The CPU injection header and the CPU extraction header can have 3 types of
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* prefixes: long, short and no prefix. The format of the header itself is the
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* same in all 3 cases.
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*
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* Extraction with long prefix:
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*
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* +-------------------+-------------------+------+------+------------+-------+
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* | ff:ff:ff:ff:ff:ff | fe:ff:ff:ff:ff:ff | 8880 | 000a | extraction | frame |
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* | | | | | header | |
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* +-------------------+-------------------+------+------+------------+-------+
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* 48 bits 48 bits 16 bits 16 bits 128 bits
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*
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* Extraction with short prefix:
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*
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* +------+------+------------+-------+
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* | 8880 | 000a | extraction | frame |
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* | | | header | |
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* +------+------+------------+-------+
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* 16 bits 16 bits 128 bits
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*
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* Extraction with no prefix:
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*
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* +------------+-------+
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* | extraction | frame |
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* | header | |
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* +------------+-------+
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* 128 bits
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*
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*
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* Injection with long prefix:
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*
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* +-------------------+-------------------+------+------+------------+-------+
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* | any dmac | any smac | 8880 | 000a | injection | frame |
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* | | | | | header | |
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* +-------------------+-------------------+------+------+------------+-------+
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* 48 bits 48 bits 16 bits 16 bits 128 bits
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*
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* Injection with short prefix:
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*
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* +------+------+------------+-------+
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* | 8880 | 000a | injection | frame |
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* | | | header | |
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* +------+------+------------+-------+
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* 16 bits 16 bits 128 bits
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*
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* Injection with no prefix:
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*
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* +------------+-------+
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* | injection | frame |
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* | header | |
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* +------------+-------+
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* 128 bits
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*
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* The injection header looks like this (network byte order, bit 127
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* is part of lowest address byte in memory, bit 0 is part of highest
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* address byte):
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*
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* +------+------+------+------+------+------+------+------+
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* 127:120 |BYPASS| MASQ | MASQ_PORT |REW_OP|REW_OP|
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* +------+------+------+------+------+------+------+------+
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* 119:112 | REW_OP |
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* +------+------+------+------+------+------+------+------+
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* 111:104 | REW_VAL |
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* +------+------+------+------+------+------+------+------+
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* 103: 96 | REW_VAL |
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* +------+------+------+------+------+------+------+------+
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* 95: 88 | REW_VAL |
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* +------+------+------+------+------+------+------+------+
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* 87: 80 | REW_VAL |
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* +------+------+------+------+------+------+------+------+
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* 79: 72 | RSV |
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* +------+------+------+------+------+------+------+------+
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* 71: 64 | RSV | DEST |
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* +------+------+------+------+------+------+------+------+
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* 63: 56 | DEST |
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* +------+------+------+------+------+------+------+------+
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* 55: 48 | RSV |
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* +------+------+------+------+------+------+------+------+
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* 47: 40 | RSV | SRC_PORT | RSV |TFRM_TIMER|
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* +------+------+------+------+------+------+------+------+
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* 39: 32 | TFRM_TIMER | RSV |
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* +------+------+------+------+------+------+------+------+
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* 31: 24 | RSV | DP | POP_CNT | CPUQ |
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* +------+------+------+------+------+------+------+------+
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* 23: 16 | CPUQ | QOS_CLASS |TAG_TYPE|
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* +------+------+------+------+------+------+------+------+
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* 15: 8 | PCP | DEI | VID |
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* +------+------+------+------+------+------+------+------+
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* 7: 0 | VID |
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* +------+------+------+------+------+------+------+------+
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*
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* And the extraction header looks like this:
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*
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* +------+------+------+------+------+------+------+------+
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* 127:120 | RSV | REW_OP |
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* +------+------+------+------+------+------+------+------+
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* 119:112 | REW_OP | REW_VAL |
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* +------+------+------+------+------+------+------+------+
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* 111:104 | REW_VAL |
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* +------+------+------+------+------+------+------+------+
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* 103: 96 | REW_VAL |
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* +------+------+------+------+------+------+------+------+
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* 95: 88 | REW_VAL |
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* +------+------+------+------+------+------+------+------+
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* 87: 80 | REW_VAL | LLEN |
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* +------+------+------+------+------+------+------+------+
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* 79: 72 | LLEN | WLEN |
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* +------+------+------+------+------+------+------+------+
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* 71: 64 | WLEN | RSV |
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* +------+------+------+------+------+------+------+------+
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* 63: 56 | RSV |
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* +------+------+------+------+------+------+------+------+
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* 55: 48 | RSV |
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* +------+------+------+------+------+------+------+------+
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* 47: 40 | RSV | SRC_PORT | ACL_ID |
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* +------+------+------+------+------+------+------+------+
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* 39: 32 | ACL_ID | RSV | SFLOW_ID |
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* +------+------+------+------+------+------+------+------+
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* 31: 24 |ACL_HIT| DP | LRN_FLAGS | CPUQ |
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* +------+------+------+------+------+------+------+------+
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* 23: 16 | CPUQ | QOS_CLASS |TAG_TYPE|
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* +------+------+------+------+------+------+------+------+
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* 15: 8 | PCP | DEI | VID |
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* +------+------+------+------+------+------+------+------+
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* 7: 0 | VID |
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* +------+------+------+------+------+------+------+------+
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*/
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struct felix_deferred_xmit_work {
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struct dsa_port *dp;
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struct sk_buff *skb;
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struct kthread_work work;
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};
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struct felix_port {
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void (*xmit_work_fn)(struct kthread_work *work);
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struct kthread_worker *xmit_worker;
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};
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static inline void ocelot_xfh_get_rew_val(void *extraction, u64 *rew_val)
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{
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packing(extraction, rew_val, 116, 85, OCELOT_TAG_LEN, UNPACK, 0);
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}
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static inline void ocelot_xfh_get_len(void *extraction, u64 *len)
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{
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u64 llen, wlen;
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packing(extraction, &llen, 84, 79, OCELOT_TAG_LEN, UNPACK, 0);
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packing(extraction, &wlen, 78, 71, OCELOT_TAG_LEN, UNPACK, 0);
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*len = 60 * wlen + llen - 80;
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}
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static inline void ocelot_xfh_get_src_port(void *extraction, u64 *src_port)
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{
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packing(extraction, src_port, 46, 43, OCELOT_TAG_LEN, UNPACK, 0);
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}
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static inline void ocelot_xfh_get_qos_class(void *extraction, u64 *qos_class)
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{
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packing(extraction, qos_class, 19, 17, OCELOT_TAG_LEN, UNPACK, 0);
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}
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static inline void ocelot_xfh_get_tag_type(void *extraction, u64 *tag_type)
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{
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packing(extraction, tag_type, 16, 16, OCELOT_TAG_LEN, UNPACK, 0);
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}
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static inline void ocelot_xfh_get_vlan_tci(void *extraction, u64 *vlan_tci)
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{
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packing(extraction, vlan_tci, 15, 0, OCELOT_TAG_LEN, UNPACK, 0);
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}
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static inline void ocelot_ifh_set_bypass(void *injection, u64 bypass)
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{
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packing(injection, &bypass, 127, 127, OCELOT_TAG_LEN, PACK, 0);
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}
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static inline void ocelot_ifh_set_rew_op(void *injection, u64 rew_op)
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{
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packing(injection, &rew_op, 125, 117, OCELOT_TAG_LEN, PACK, 0);
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}
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static inline void ocelot_ifh_set_dest(void *injection, u64 dest)
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{
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packing(injection, &dest, 67, 56, OCELOT_TAG_LEN, PACK, 0);
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}
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static inline void ocelot_ifh_set_qos_class(void *injection, u64 qos_class)
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{
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packing(injection, &qos_class, 19, 17, OCELOT_TAG_LEN, PACK, 0);
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}
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static inline void seville_ifh_set_dest(void *injection, u64 dest)
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{
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packing(injection, &dest, 67, 57, OCELOT_TAG_LEN, PACK, 0);
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}
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static inline void ocelot_ifh_set_src(void *injection, u64 src)
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{
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packing(injection, &src, 46, 43, OCELOT_TAG_LEN, PACK, 0);
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}
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static inline void ocelot_ifh_set_tag_type(void *injection, u64 tag_type)
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{
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packing(injection, &tag_type, 16, 16, OCELOT_TAG_LEN, PACK, 0);
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}
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static inline void ocelot_ifh_set_vid(void *injection, u64 vid)
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{
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packing(injection, &vid, 11, 0, OCELOT_TAG_LEN, PACK, 0);
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}
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/* Determine the PTP REW_OP to use for injecting the given skb */
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static inline u32 ocelot_ptp_rew_op(struct sk_buff *skb)
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{
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struct sk_buff *clone = OCELOT_SKB_CB(skb)->clone;
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u8 ptp_cmd = OCELOT_SKB_CB(skb)->ptp_cmd;
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u32 rew_op = 0;
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if (ptp_cmd == IFH_REW_OP_TWO_STEP_PTP && clone) {
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rew_op = ptp_cmd;
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rew_op |= OCELOT_SKB_CB(clone)->ts_id << 3;
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} else if (ptp_cmd == IFH_REW_OP_ORIGIN_PTP) {
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rew_op = ptp_cmd;
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}
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return rew_op;
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}
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#endif
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