1 /* SPDX-License-Identifier: GPL-2.0
2 * Copyright 2019-2021 NXP
3 */
4
5 #ifndef _NET_DSA_TAG_OCELOT_H
6 #define _NET_DSA_TAG_OCELOT_H
7
8 #include <linux/kthread.h>
9 #include <linux/packing.h>
10 #include <linux/skbuff.h>
11 #include <net/dsa.h>
12
13 struct ocelot_skb_cb {
14 struct sk_buff *clone;
15 unsigned int ptp_class; /* valid only for clones */
16 u32 tstamp_lo;
17 u8 ptp_cmd;
18 u8 ts_id;
19 };
20
21 #define OCELOT_SKB_CB(skb) \
22 ((struct ocelot_skb_cb *)((skb)->cb))
23
24 #define IFH_TAG_TYPE_C 0
25 #define IFH_TAG_TYPE_S 1
26
27 #define IFH_REW_OP_NOOP 0x0
28 #define IFH_REW_OP_DSCP 0x1
29 #define IFH_REW_OP_ONE_STEP_PTP 0x2
30 #define IFH_REW_OP_TWO_STEP_PTP 0x3
31 #define IFH_REW_OP_ORIGIN_PTP 0x5
32
33 #define OCELOT_TAG_LEN 16
34 #define OCELOT_SHORT_PREFIX_LEN 4
35 #define OCELOT_LONG_PREFIX_LEN 16
36 #define OCELOT_TOTAL_TAG_LEN (OCELOT_SHORT_PREFIX_LEN + OCELOT_TAG_LEN)
37
38 /* The CPU injection header and the CPU extraction header can have 3 types of
39 * prefixes: long, short and no prefix. The format of the header itself is the
40 * same in all 3 cases.
41 *
42 * Extraction with long prefix:
43 *
44 * +-------------------+-------------------+------+------+------------+-------+
45 * | ff:ff:ff:ff:ff:ff | fe:ff:ff:ff:ff:ff | 8880 | 000a | extraction | frame |
46 * | | | | | header | |
47 * +-------------------+-------------------+------+------+------------+-------+
48 * 48 bits 48 bits 16 bits 16 bits 128 bits
49 *
50 * Extraction with short prefix:
51 *
52 * +------+------+------------+-------+
53 * | 8880 | 000a | extraction | frame |
54 * | | | header | |
55 * +------+------+------------+-------+
56 * 16 bits 16 bits 128 bits
57 *
58 * Extraction with no prefix:
59 *
60 * +------------+-------+
61 * | extraction | frame |
62 * | header | |
63 * +------------+-------+
64 * 128 bits
65 *
66 *
67 * Injection with long prefix:
68 *
69 * +-------------------+-------------------+------+------+------------+-------+
70 * | any dmac | any smac | 8880 | 000a | injection | frame |
71 * | | | | | header | |
72 * +-------------------+-------------------+------+------+------------+-------+
73 * 48 bits 48 bits 16 bits 16 bits 128 bits
74 *
75 * Injection with short prefix:
76 *
77 * +------+------+------------+-------+
78 * | 8880 | 000a | injection | frame |
79 * | | | header | |
80 * +------+------+------------+-------+
81 * 16 bits 16 bits 128 bits
82 *
83 * Injection with no prefix:
84 *
85 * +------------+-------+
86 * | injection | frame |
87 * | header | |
88 * +------------+-------+
89 * 128 bits
90 *
91 * The injection header looks like this (network byte order, bit 127
92 * is part of lowest address byte in memory, bit 0 is part of highest
93 * address byte):
94 *
95 * +------+------+------+------+------+------+------+------+
96 * 127:120 |BYPASS| MASQ | MASQ_PORT |REW_OP|REW_OP|
97 * +------+------+------+------+------+------+------+------+
98 * 119:112 | REW_OP |
99 * +------+------+------+------+------+------+------+------+
100 * 111:104 | REW_VAL |
101 * +------+------+------+------+------+------+------+------+
102 * 103: 96 | REW_VAL |
103 * +------+------+------+------+------+------+------+------+
104 * 95: 88 | REW_VAL |
105 * +------+------+------+------+------+------+------+------+
106 * 87: 80 | REW_VAL |
107 * +------+------+------+------+------+------+------+------+
108 * 79: 72 | RSV |
109 * +------+------+------+------+------+------+------+------+
110 * 71: 64 | RSV | DEST |
111 * +------+------+------+------+------+------+------+------+
112 * 63: 56 | DEST |
113 * +------+------+------+------+------+------+------+------+
114 * 55: 48 | RSV |
115 * +------+------+------+------+------+------+------+------+
116 * 47: 40 | RSV | SRC_PORT | RSV |TFRM_TIMER|
117 * +------+------+------+------+------+------+------+------+
118 * 39: 32 | TFRM_TIMER | RSV |
119 * +------+------+------+------+------+------+------+------+
120 * 31: 24 | RSV | DP | POP_CNT | CPUQ |
121 * +------+------+------+------+------+------+------+------+
122 * 23: 16 | CPUQ | QOS_CLASS |TAG_TYPE|
123 * +------+------+------+------+------+------+------+------+
124 * 15: 8 | PCP | DEI | VID |
125 * +------+------+------+------+------+------+------+------+
126 * 7: 0 | VID |
127 * +------+------+------+------+------+------+------+------+
128 *
129 * And the extraction header looks like this:
130 *
131 * +------+------+------+------+------+------+------+------+
132 * 127:120 | RSV | REW_OP |
133 * +------+------+------+------+------+------+------+------+
134 * 119:112 | REW_OP | REW_VAL |
135 * +------+------+------+------+------+------+------+------+
136 * 111:104 | REW_VAL |
137 * +------+------+------+------+------+------+------+------+
138 * 103: 96 | REW_VAL |
139 * +------+------+------+------+------+------+------+------+
140 * 95: 88 | REW_VAL |
141 * +------+------+------+------+------+------+------+------+
142 * 87: 80 | REW_VAL | LLEN |
143 * +------+------+------+------+------+------+------+------+
144 * 79: 72 | LLEN | WLEN |
145 * +------+------+------+------+------+------+------+------+
146 * 71: 64 | WLEN | RSV |
147 * +------+------+------+------+------+------+------+------+
148 * 63: 56 | RSV |
149 * +------+------+------+------+------+------+------+------+
150 * 55: 48 | RSV |
151 * +------+------+------+------+------+------+------+------+
152 * 47: 40 | RSV | SRC_PORT | ACL_ID |
153 * +------+------+------+------+------+------+------+------+
154 * 39: 32 | ACL_ID | RSV | SFLOW_ID |
155 * +------+------+------+------+------+------+------+------+
156 * 31: 24 |ACL_HIT| DP | LRN_FLAGS | CPUQ |
157 * +------+------+------+------+------+------+------+------+
158 * 23: 16 | CPUQ | QOS_CLASS |TAG_TYPE|
159 * +------+------+------+------+------+------+------+------+
160 * 15: 8 | PCP | DEI | VID |
161 * +------+------+------+------+------+------+------+------+
162 * 7: 0 | VID |
163 * +------+------+------+------+------+------+------+------+
164 */
165
166 struct felix_deferred_xmit_work {
167 struct dsa_port *dp;
168 struct sk_buff *skb;
169 struct kthread_work work;
170 };
171
172 struct ocelot_8021q_tagger_data {
173 void (*xmit_work_fn)(struct kthread_work *work);
174 };
175
176 static inline struct ocelot_8021q_tagger_data *
ocelot_8021q_tagger_data(struct dsa_switch * ds)177 ocelot_8021q_tagger_data(struct dsa_switch *ds)
178 {
179 BUG_ON(ds->dst->tag_ops->proto != DSA_TAG_PROTO_OCELOT_8021Q);
180
181 return ds->tagger_data;
182 }
183
ocelot_xfh_get_rew_val(void * extraction,u64 * rew_val)184 static inline void ocelot_xfh_get_rew_val(void *extraction, u64 *rew_val)
185 {
186 packing(extraction, rew_val, 116, 85, OCELOT_TAG_LEN, UNPACK, 0);
187 }
188
ocelot_xfh_get_len(void * extraction,u64 * len)189 static inline void ocelot_xfh_get_len(void *extraction, u64 *len)
190 {
191 u64 llen, wlen;
192
193 packing(extraction, &llen, 84, 79, OCELOT_TAG_LEN, UNPACK, 0);
194 packing(extraction, &wlen, 78, 71, OCELOT_TAG_LEN, UNPACK, 0);
195
196 *len = 60 * wlen + llen - 80;
197 }
198
ocelot_xfh_get_src_port(void * extraction,u64 * src_port)199 static inline void ocelot_xfh_get_src_port(void *extraction, u64 *src_port)
200 {
201 packing(extraction, src_port, 46, 43, OCELOT_TAG_LEN, UNPACK, 0);
202 }
203
ocelot_xfh_get_qos_class(void * extraction,u64 * qos_class)204 static inline void ocelot_xfh_get_qos_class(void *extraction, u64 *qos_class)
205 {
206 packing(extraction, qos_class, 19, 17, OCELOT_TAG_LEN, UNPACK, 0);
207 }
208
ocelot_xfh_get_tag_type(void * extraction,u64 * tag_type)209 static inline void ocelot_xfh_get_tag_type(void *extraction, u64 *tag_type)
210 {
211 packing(extraction, tag_type, 16, 16, OCELOT_TAG_LEN, UNPACK, 0);
212 }
213
ocelot_xfh_get_vlan_tci(void * extraction,u64 * vlan_tci)214 static inline void ocelot_xfh_get_vlan_tci(void *extraction, u64 *vlan_tci)
215 {
216 packing(extraction, vlan_tci, 15, 0, OCELOT_TAG_LEN, UNPACK, 0);
217 }
218
ocelot_ifh_set_bypass(void * injection,u64 bypass)219 static inline void ocelot_ifh_set_bypass(void *injection, u64 bypass)
220 {
221 packing(injection, &bypass, 127, 127, OCELOT_TAG_LEN, PACK, 0);
222 }
223
ocelot_ifh_set_rew_op(void * injection,u64 rew_op)224 static inline void ocelot_ifh_set_rew_op(void *injection, u64 rew_op)
225 {
226 packing(injection, &rew_op, 125, 117, OCELOT_TAG_LEN, PACK, 0);
227 }
228
ocelot_ifh_set_dest(void * injection,u64 dest)229 static inline void ocelot_ifh_set_dest(void *injection, u64 dest)
230 {
231 packing(injection, &dest, 67, 56, OCELOT_TAG_LEN, PACK, 0);
232 }
233
ocelot_ifh_set_qos_class(void * injection,u64 qos_class)234 static inline void ocelot_ifh_set_qos_class(void *injection, u64 qos_class)
235 {
236 packing(injection, &qos_class, 19, 17, OCELOT_TAG_LEN, PACK, 0);
237 }
238
seville_ifh_set_dest(void * injection,u64 dest)239 static inline void seville_ifh_set_dest(void *injection, u64 dest)
240 {
241 packing(injection, &dest, 67, 57, OCELOT_TAG_LEN, PACK, 0);
242 }
243
ocelot_ifh_set_src(void * injection,u64 src)244 static inline void ocelot_ifh_set_src(void *injection, u64 src)
245 {
246 packing(injection, &src, 46, 43, OCELOT_TAG_LEN, PACK, 0);
247 }
248
ocelot_ifh_set_tag_type(void * injection,u64 tag_type)249 static inline void ocelot_ifh_set_tag_type(void *injection, u64 tag_type)
250 {
251 packing(injection, &tag_type, 16, 16, OCELOT_TAG_LEN, PACK, 0);
252 }
253
ocelot_ifh_set_vlan_tci(void * injection,u64 vlan_tci)254 static inline void ocelot_ifh_set_vlan_tci(void *injection, u64 vlan_tci)
255 {
256 packing(injection, &vlan_tci, 15, 0, OCELOT_TAG_LEN, PACK, 0);
257 }
258
259 /* Determine the PTP REW_OP to use for injecting the given skb */
ocelot_ptp_rew_op(struct sk_buff * skb)260 static inline u32 ocelot_ptp_rew_op(struct sk_buff *skb)
261 {
262 struct sk_buff *clone = OCELOT_SKB_CB(skb)->clone;
263 u8 ptp_cmd = OCELOT_SKB_CB(skb)->ptp_cmd;
264 u32 rew_op = 0;
265
266 if (ptp_cmd == IFH_REW_OP_TWO_STEP_PTP && clone) {
267 rew_op = ptp_cmd;
268 rew_op |= OCELOT_SKB_CB(clone)->ts_id << 3;
269 } else if (ptp_cmd == IFH_REW_OP_ORIGIN_PTP) {
270 rew_op = ptp_cmd;
271 }
272
273 return rew_op;
274 }
275
276 #endif
277