examples/l3fwd-power: force link speed

Currently, l3fwd-power starts in auto-negotiation mode, but it may fail
to link up when auto-negotiation is not supported. Therefore, it is
necessary to support starting with a specified speed for port.

Additionally, this patch does not support changing the duplex mode.
 So speeds like 10M, 100M are not configurable using this method.

Signed-off-by: Dengdui Huang <huangdengdui@huawei.com>
Reviewed-by: Chengwen Feng <fengchengwen@huawei.com>

diff --git a/examples/l3fwd-power/main.c b/examples/l3fwd-power/main.c
index f9ce9e66988c6c1b8f7f34fba487cb6937db9408..ec12d1cc0b736c0a97f910c88842f8e0155c07f2 100644 (file)
--- a/examples/l3fwd-power/main.c
+++ b/examples/l3fwd-power/main.c
@@ -1501,6 +1501,7 @@ print_usage(const char *prgname)
                "  -U: set min/max frequency for uncore to maximum value\n"
                "  -i (frequency index): set min/max frequency for uncore to specified frequency index\n"
                "  --config (port,queue,lcore): rx queues configuration\n"
+               "  --eth-link-speed: force link speed\n"
                "  --cpu-resume-latency LATENCY: set CPU resume latency to control C-state selection,"
                " 0 : just allow to enter C0-state\n"
                "  --high-perf-cores CORELIST: list of high performance cores\n"
@@ -1742,12 +1743,14 @@ parse_pmd_mgmt_config(const char *name)
 #define CMD_LINE_OPT_SCALE_FREQ_MIN "scale-freq-min"
 #define CMD_LINE_OPT_SCALE_FREQ_MAX "scale-freq-max"
 #define CMD_LINE_OPT_CPU_RESUME_LATENCY "cpu-resume-latency"
+#define CMD_LINK_OPT_ETH_LINK_SPEED "eth-link-speed"
 
 /* Parse the argument given in the command line of the application */
 static int
 parse_args(int argc, char **argv)
 {
        int opt, ret;
+       int speed_num;
        char **argvopt;
        int option_index;
        char *prgname = argv[0];
@@ -1767,6 +1770,7 @@ parse_args(int argc, char **argv)
                {CMD_LINE_OPT_PAUSE_DURATION, 1, 0, 0},
                {CMD_LINE_OPT_SCALE_FREQ_MIN, 1, 0, 0},
                {CMD_LINE_OPT_SCALE_FREQ_MAX, 1, 0, 0},
+               {CMD_LINK_OPT_ETH_LINK_SPEED, 1, 0, 0},
                {NULL, 0, 0, 0}
        };
 
@@ -1951,6 +1955,20 @@ parse_args(int argc, char **argv)
                                printf("PM QoS configured\n");
                        }
 
+                       if (!strncmp(lgopts[option_index].name,
+                                       CMD_LINK_OPT_ETH_LINK_SPEED,
+                                       sizeof(CMD_LINK_OPT_ETH_LINK_SPEED))) {
+                               speed_num = atoi(optarg);
+                               if ((speed_num == RTE_ETH_SPEED_NUM_10M) ||
+                               (speed_num == RTE_ETH_SPEED_NUM_100M)) {
+                                       fprintf(stderr, "Unsupported fixed speed\n");
+                                       print_usage(prgname);
+                                       return -1;
+                               }
+                               if (speed_num >= 0 && rte_eth_speed_bitflag(speed_num, 0) > 0)
+                                       port_conf.link_speeds = rte_eth_speed_bitflag(speed_num, 0);
+                       }
+
                        break;
 
                default: