1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2010-2016 Intel Corporation
3 */
4
5 #include <stdint.h>
6 #include <stdio.h>
7 #include <inttypes.h>
8 #include <stdarg.h>
9 #include <errno.h>
10 #include <sys/queue.h>
11 #include <stdlib.h>
12 #include <getopt.h>
13 #include <string.h>
14
15 #include <rte_common.h>
16 #include <rte_malloc.h>
17 #include <rte_memory.h>
18 #include <rte_memzone.h>
19 #include <rte_eal.h>
20 #include <rte_branch_prediction.h>
21 #include <rte_log.h>
22 #include <rte_per_lcore.h>
23 #include <rte_lcore.h>
24 #include <rte_ring.h>
25 #include <rte_launch.h>
26 #include <rte_debug.h>
27 #include <rte_mempool.h>
28 #include <rte_mbuf.h>
29 #include <rte_interrupts.h>
30 #include <rte_ether.h>
31 #include <rte_ethdev.h>
32 #include <rte_string_fns.h>
33
34 #include "common.h"
35
36 /* Number of packets to attempt to read from queue */
37 #define PKT_READ_SIZE ((uint16_t)32)
38
39 /* our client id number - tells us which rx queue to read, and NIC TX
40 * queue to write to. */
41 static uint8_t client_id = 0;
42
43 #define MBQ_CAPACITY 32
44
45 /* maps input ports to output ports for packets */
46 static uint16_t output_ports[RTE_MAX_ETHPORTS];
47
48 /* buffers up a set of packet that are ready to send */
49 struct rte_eth_dev_tx_buffer *tx_buffer[RTE_MAX_ETHPORTS];
50
51 /* shared data from server. We update statistics here */
52 static volatile struct tx_stats *tx_stats;
53
54
55 /*
56 * print a usage message
57 */
58 static void
usage(const char * progname)59 usage(const char *progname)
60 {
61 printf("Usage: %s [EAL args] -- -n <client_id>\n\n", progname);
62 }
63
64 /*
65 * Convert the client id number from a string to an int.
66 */
67 static int
parse_client_num(const char * client)68 parse_client_num(const char *client)
69 {
70 char *end = NULL;
71 unsigned long temp;
72
73 if (client == NULL || *client == '\0')
74 return -1;
75
76 temp = strtoul(client, &end, 10);
77 if (end == NULL || *end != '\0')
78 return -1;
79
80 client_id = (uint8_t)temp;
81 return 0;
82 }
83
84 /*
85 * Parse the application arguments to the client app.
86 */
87 static int
parse_app_args(int argc,char * argv[])88 parse_app_args(int argc, char *argv[])
89 {
90 int option_index, opt;
91 char **argvopt = argv;
92 const char *progname = NULL;
93 static struct option lgopts[] = { /* no long options */
94 {NULL, 0, 0, 0 }
95 };
96 progname = argv[0];
97
98 while ((opt = getopt_long(argc, argvopt, "n:", lgopts,
99 &option_index)) != EOF){
100 switch (opt){
101 case 'n':
102 if (parse_client_num(optarg) != 0){
103 usage(progname);
104 return -1;
105 }
106 break;
107 default:
108 usage(progname);
109 return -1;
110 }
111 }
112 return 0;
113 }
114
115 /*
116 * Tx buffer error callback
117 */
118 static void
flush_tx_error_callback(struct rte_mbuf ** unsent,uint16_t count,void * userdata)119 flush_tx_error_callback(struct rte_mbuf **unsent, uint16_t count,
120 void *userdata) {
121 int i;
122 uint16_t port_id = (uintptr_t)userdata;
123
124 tx_stats->tx_drop[port_id] += count;
125
126 /* free the mbufs which failed from transmit */
127 for (i = 0; i < count; i++)
128 rte_pktmbuf_free(unsent[i]);
129
130 }
131
132 static void
configure_tx_buffer(uint16_t port_id,uint16_t size)133 configure_tx_buffer(uint16_t port_id, uint16_t size)
134 {
135 int ret;
136
137 /* Initialize TX buffers */
138 tx_buffer[port_id] = rte_zmalloc_socket("tx_buffer",
139 RTE_ETH_TX_BUFFER_SIZE(size), 0,
140 rte_eth_dev_socket_id(port_id));
141 if (tx_buffer[port_id] == NULL)
142 rte_exit(EXIT_FAILURE, "Cannot allocate buffer for tx on port %u\n",
143 port_id);
144
145 rte_eth_tx_buffer_init(tx_buffer[port_id], size);
146
147 ret = rte_eth_tx_buffer_set_err_callback(tx_buffer[port_id],
148 flush_tx_error_callback, (void *)(intptr_t)port_id);
149 if (ret < 0)
150 rte_exit(EXIT_FAILURE,
151 "Cannot set error callback for tx buffer on port %u\n",
152 port_id);
153 }
154
155 /*
156 * set up output ports so that all traffic on port gets sent out
157 * its paired port. Index using actual port numbers since that is
158 * what comes in the mbuf structure.
159 */
160 static void
configure_output_ports(const struct port_info * ports)161 configure_output_ports(const struct port_info *ports)
162 {
163 int i;
164 if (ports->num_ports > RTE_MAX_ETHPORTS)
165 rte_exit(EXIT_FAILURE, "Too many ethernet ports. RTE_MAX_ETHPORTS = %u\n",
166 (unsigned)RTE_MAX_ETHPORTS);
167 for (i = 0; i < ports->num_ports - 1; i+=2){
168 uint16_t p1 = ports->id[i];
169 uint16_t p2 = ports->id[i+1];
170 output_ports[p1] = p2;
171 output_ports[p2] = p1;
172
173 configure_tx_buffer(p1, MBQ_CAPACITY);
174 configure_tx_buffer(p2, MBQ_CAPACITY);
175
176 }
177 }
178
179 /*
180 * This function performs routing of packets
181 * Just sends each input packet out an output port based solely on the input
182 * port it arrived on.
183 */
184 static void
handle_packet(struct rte_mbuf * buf)185 handle_packet(struct rte_mbuf *buf)
186 {
187 int sent;
188 const uint16_t in_port = buf->port;
189 const uint16_t out_port = output_ports[in_port];
190 struct rte_eth_dev_tx_buffer *buffer = tx_buffer[out_port];
191
192 sent = rte_eth_tx_buffer(out_port, client_id, buffer, buf);
193 if (sent)
194 tx_stats->tx[out_port] += sent;
195
196 }
197
198 /*
199 * Application main function - loops through
200 * receiving and processing packets. Never returns
201 */
202 int
main(int argc,char * argv[])203 main(int argc, char *argv[])
204 {
205 const struct rte_memzone *mz;
206 struct rte_ring *rx_ring;
207 struct rte_mempool *mp;
208 struct port_info *ports;
209 int need_flush = 0; /* indicates whether we have unsent packets */
210 int retval;
211 void *pkts[PKT_READ_SIZE];
212 uint16_t sent;
213
214 if ((retval = rte_eal_init(argc, argv)) < 0)
215 return -1;
216 argc -= retval;
217 argv += retval;
218
219 if (parse_app_args(argc, argv) < 0)
220 rte_exit(EXIT_FAILURE, "Invalid command-line arguments\n");
221
222 if (rte_eth_dev_count_avail() == 0)
223 rte_exit(EXIT_FAILURE, "No Ethernet ports - bye\n");
224
225 rx_ring = rte_ring_lookup(get_rx_queue_name(client_id));
226 if (rx_ring == NULL)
227 rte_exit(EXIT_FAILURE, "Cannot get RX ring - is server process running?\n");
228
229 mp = rte_mempool_lookup(PKTMBUF_POOL_NAME);
230 if (mp == NULL)
231 rte_exit(EXIT_FAILURE, "Cannot get mempool for mbufs\n");
232
233 mz = rte_memzone_lookup(MZ_PORT_INFO);
234 if (mz == NULL)
235 rte_exit(EXIT_FAILURE, "Cannot get port info structure\n");
236 ports = mz->addr;
237 tx_stats = &(ports->tx_stats[client_id]);
238
239 configure_output_ports(ports);
240
241 RTE_LOG(INFO, APP, "Finished Process Init.\n");
242
243 printf("\nClient process %d handling packets\n", client_id);
244 printf("[Press Ctrl-C to quit ...]\n");
245
246 for (;;) {
247 uint16_t i, rx_pkts;
248
249 rx_pkts = rte_ring_dequeue_burst(rx_ring, pkts,
250 PKT_READ_SIZE, NULL);
251
252 if (rx_pkts == 0 && need_flush) {
253 for (i = 0; i < ports->num_ports; i++) {
254 uint16_t port = ports->id[i];
255
256 sent = rte_eth_tx_buffer_flush(port,
257 client_id,
258 tx_buffer[port]);
259 tx_stats->tx[port] += sent;
260 }
261 need_flush = 0;
262 continue;
263 }
264
265 for (i = 0; i < rx_pkts; i++)
266 handle_packet(pkts[i]);
267
268 need_flush = 1;
269 }
270
271 /* clean up the EAL */
272 rte_eal_cleanup();
273 }
274