1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
|
/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2016 Intel Corporation.
* Copyright(c) 2017 IBM Corporation.
* All rights reserved.
*/
#ifndef _L3FWD_ALTIVEC_H_
#define _L3FWD_ALTIVEC_H_
#include "l3fwd.h"
#include "l3fwd_common.h"
/*
* Update source and destination MAC addresses in the ethernet header.
* Perform RFC1812 checks and updates for IPV4 packets.
*/
static inline void
processx4_step3(struct rte_mbuf *pkt[FWDSTEP], uint16_t dst_port[FWDSTEP])
{
vector unsigned int te[FWDSTEP];
vector unsigned int ve[FWDSTEP];
vector unsigned int *p[FWDSTEP];
p[0] = rte_pktmbuf_mtod(pkt[0], vector unsigned int *);
p[1] = rte_pktmbuf_mtod(pkt[1], vector unsigned int *);
p[2] = rte_pktmbuf_mtod(pkt[2], vector unsigned int *);
p[3] = rte_pktmbuf_mtod(pkt[3], vector unsigned int *);
ve[0] = (vector unsigned int)val_eth[dst_port[0]];
te[0] = *p[0];
ve[1] = (vector unsigned int)val_eth[dst_port[1]];
te[1] = *p[1];
ve[2] = (vector unsigned int)val_eth[dst_port[2]];
te[2] = *p[2];
ve[3] = (vector unsigned int)val_eth[dst_port[3]];
te[3] = *p[3];
/* Update first 12 bytes, keep rest bytes intact. */
te[0] = (vector unsigned int)vec_sel(
(vector unsigned short)ve[0],
(vector unsigned short)te[0],
(vector unsigned short) {0, 0, 0, 0,
0, 0, 0xffff, 0xffff});
te[1] = (vector unsigned int)vec_sel(
(vector unsigned short)ve[1],
(vector unsigned short)te[1],
(vector unsigned short) {0, 0, 0, 0,
0, 0, 0xffff, 0xffff});
te[2] = (vector unsigned int)vec_sel(
(vector unsigned short)ve[2],
(vector unsigned short)te[2],
(vector unsigned short) {0, 0, 0, 0, 0,
0, 0xffff, 0xffff});
te[3] = (vector unsigned int)vec_sel(
(vector unsigned short)ve[3],
(vector unsigned short)te[3],
(vector unsigned short) {0, 0, 0, 0,
0, 0, 0xffff, 0xffff});
*p[0] = te[0];
*p[1] = te[1];
*p[2] = te[2];
*p[3] = te[3];
rfc1812_process((struct ipv4_hdr *)((struct ether_hdr *)p[0] + 1),
&dst_port[0], pkt[0]->packet_type);
rfc1812_process((struct ipv4_hdr *)((struct ether_hdr *)p[1] + 1),
&dst_port[1], pkt[1]->packet_type);
rfc1812_process((struct ipv4_hdr *)((struct ether_hdr *)p[2] + 1),
&dst_port[2], pkt[2]->packet_type);
rfc1812_process((struct ipv4_hdr *)((struct ether_hdr *)p[3] + 1),
&dst_port[3], pkt[3]->packet_type);
}
/*
* Group consecutive packets with the same destination port in bursts of 4.
* Suppose we have array of destination ports:
* dst_port[] = {a, b, c, d,, e, ... }
* dp1 should contain: <a, b, c, d>, dp2: <b, c, d, e>.
* We doing 4 comparisons at once and the result is 4 bit mask.
* This mask is used as an index into prebuild array of pnum values.
*/
static inline uint16_t *
port_groupx4(uint16_t pn[FWDSTEP + 1], uint16_t *lp, vector unsigned short dp1,
vector unsigned short dp2)
{
union {
uint16_t u16[FWDSTEP + 1];
uint64_t u64;
} *pnum = (void *)pn;
int32_t v;
v = vec_any_eq(dp1, dp2);
/* update last port counter. */
lp[0] += gptbl[v].lpv;
/* if dest port value has changed. */
if (v != GRPMSK) {
pnum->u64 = gptbl[v].pnum;
pnum->u16[FWDSTEP] = 1;
lp = pnum->u16 + gptbl[v].idx;
}
return lp;
}
/**
* Process one packet:
* Update source and destination MAC addresses in the ethernet header.
* Perform RFC1812 checks and updates for IPV4 packets.
*/
static inline void
process_packet(struct rte_mbuf *pkt, uint16_t *dst_port)
{
struct ether_hdr *eth_hdr;
vector unsigned int te, ve;
eth_hdr = rte_pktmbuf_mtod(pkt, struct ether_hdr *);
te = *(vector unsigned int *)eth_hdr;
ve = (vector unsigned int)val_eth[dst_port[0]];
rfc1812_process((struct ipv4_hdr *)(eth_hdr + 1), dst_port,
pkt->packet_type);
/* dynamically vec_sel te and ve for MASK_ETH (0x3f) */
te = (vector unsigned int)vec_sel(
(vector unsigned short)ve,
(vector unsigned short)te,
(vector unsigned short){0, 0, 0, 0,
0, 0, 0xffff, 0xffff});
*(vector unsigned int *)eth_hdr = te;
}
/**
* Send packets burst from pkts_burst to the ports in dst_port array
*/
static __rte_always_inline void
send_packets_multi(struct lcore_conf *qconf, struct rte_mbuf **pkts_burst,
uint16_t dst_port[MAX_PKT_BURST], int nb_rx)
{
int32_t k;
int j = 0;
uint16_t dlp;
uint16_t *lp;
uint16_t pnum[MAX_PKT_BURST + 1];
/*
* Finish packet processing and group consecutive
* packets with the same destination port.
*/
k = RTE_ALIGN_FLOOR(nb_rx, FWDSTEP);
if (k != 0) {
vector unsigned short dp1, dp2;
lp = pnum;
lp[0] = 1;
processx4_step3(pkts_burst, dst_port);
/* dp1: <d[0], d[1], d[2], d[3], ... > */
dp1 = *(vector unsigned short *)dst_port;
for (j = FWDSTEP; j != k; j += FWDSTEP) {
processx4_step3(&pkts_burst[j], &dst_port[j]);
/*
* dp2:
* <d[j-3], d[j-2], d[j-1], d[j], ... >
*/
dp2 = *((vector unsigned short *)
&dst_port[j - FWDSTEP + 1]);
lp = port_groupx4(&pnum[j - FWDSTEP], lp, dp1, dp2);
/*
* dp1:
* <d[j], d[j+1], d[j+2], d[j+3], ... >
*/
dp1 = vec_sro(dp2, (vector unsigned char) {
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, (FWDSTEP - 1) * sizeof(dst_port[0])});
}
/*
* dp2: <d[j-3], d[j-2], d[j-1], d[j-1], ... >
*/
dp2 = vec_perm(dp1, (vector unsigned short){},
(vector unsigned char){0xf9});
lp = port_groupx4(&pnum[j - FWDSTEP], lp, dp1, dp2);
/*
* remove values added by the last repeated
* dst port.
*/
lp[0]--;
dlp = dst_port[j - 1];
} else {
/* set dlp and lp to the never used values. */
dlp = BAD_PORT - 1;
lp = pnum + MAX_PKT_BURST;
}
/* Process up to last 3 packets one by one. */
switch (nb_rx % FWDSTEP) {
case 3:
process_packet(pkts_burst[j], dst_port + j);
GROUP_PORT_STEP(dlp, dst_port, lp, pnum, j);
j++;
/* fall-through */
case 2:
process_packet(pkts_burst[j], dst_port + j);
GROUP_PORT_STEP(dlp, dst_port, lp, pnum, j);
j++;
/* fall-through */
case 1:
process_packet(pkts_burst[j], dst_port + j);
GROUP_PORT_STEP(dlp, dst_port, lp, pnum, j);
j++;
}
/*
* Send packets out, through destination port.
* Consecutive packets with the same destination port
* are already grouped together.
* If destination port for the packet equals BAD_PORT,
* then free the packet without sending it out.
*/
for (j = 0; j < nb_rx; j += k) {
int32_t m;
uint16_t pn;
pn = dst_port[j];
k = pnum[j];
if (likely(pn != BAD_PORT))
send_packetsx4(qconf, pn, pkts_burst + j, k);
else
for (m = j; m != j + k; m++)
rte_pktmbuf_free(pkts_burst[m]);
}
}
#endif /* _L3FWD_ALTIVEC_H_ */
|
