[PATCH 1/2] examples/l3fwd: support specify link speed

[PATCH 1/2] examples/l3fwd: support specify link speed

[Dengdui Huang]

Currently, l3fwd 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>
---
 examples/l3fwd/main.c | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/examples/l3fwd/main.c b/examples/l3fwd/main.c
index ae3b4f6439..86235b39d7 100644
--- a/examples/l3fwd/main.c
+++ b/examples/l3fwd/main.c
@@ -423,6 +423,7 @@ print_usage(const char *prgname)
 		"            Accepted: em (Exact Match), lpm (Longest Prefix Match), fib (Forwarding Information Base),\n"
 		"                      acl (Access Control List)\n"
 		"  --config (port,queue,lcore): Rx queue configuration\n"
+		"  --eth-link-speed: force link speed\n"
 		"  --rx-queue-size NPKTS: Rx queue size in decimal\n"
 		"            Default: %d\n"
 		"  --tx-queue-size NPKTS: Tx queue size in decimal\n"
@@ -747,6 +748,7 @@ static const char short_options[] =
 	;
 
 #define CMD_LINE_OPT_CONFIG "config"
+#define CMD_LINK_OPT_ETH_LINK_SPEED "eth-link-speed"
 #define CMD_LINE_OPT_RX_QUEUE_SIZE "rx-queue-size"
 #define CMD_LINE_OPT_TX_QUEUE_SIZE "tx-queue-size"
 #define CMD_LINE_OPT_ETH_DEST "eth-dest"
@@ -778,6 +780,7 @@ enum {
 	 * conflict with short options */
 	CMD_LINE_OPT_MIN_NUM = 256,
 	CMD_LINE_OPT_CONFIG_NUM,
+	CMD_LINK_OPT_ETH_LINK_SPEED_NUM,
 	CMD_LINE_OPT_RX_QUEUE_SIZE_NUM,
 	CMD_LINE_OPT_TX_QUEUE_SIZE_NUM,
 	CMD_LINE_OPT_ETH_DEST_NUM,
@@ -805,6 +808,7 @@ enum {
 
 static const struct option lgopts[] = {
 	{CMD_LINE_OPT_CONFIG, 1, 0, CMD_LINE_OPT_CONFIG_NUM},
+	{CMD_LINK_OPT_ETH_LINK_SPEED, 1, 0, CMD_LINK_OPT_ETH_LINK_SPEED_NUM},
 	{CMD_LINE_OPT_RX_QUEUE_SIZE, 1, 0, CMD_LINE_OPT_RX_QUEUE_SIZE_NUM},
 	{CMD_LINE_OPT_TX_QUEUE_SIZE, 1, 0, CMD_LINE_OPT_TX_QUEUE_SIZE_NUM},
 	{CMD_LINE_OPT_ETH_DEST, 1, 0, CMD_LINE_OPT_ETH_DEST_NUM},
@@ -860,6 +864,7 @@ parse_args(int argc, char **argv)
 	uint8_t eth_rx_q = 0;
 	struct l3fwd_event_resources *evt_rsrc = l3fwd_get_eventdev_rsrc();
 #endif
+	int speed_num;
 
 	argvopt = argv;
 
@@ -908,7 +913,17 @@ parse_args(int argc, char **argv)
 			}
 			lcore_params = 1;
 			break;
-
+		case CMD_LINK_OPT_ETH_LINK_SPEED_NUM:
+			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;
 		case CMD_LINE_OPT_RX_QUEUE_SIZE_NUM:
 			parse_queue_size(optarg, &nb_rxd, 1);
 			break;
-- 
2.33.0

[PATCH 2/2] examples/l3fwd-power: support specify link speed

[Dengdui Huang]

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>
---
 examples/l3fwd-power/main.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/examples/l3fwd-power/main.c b/examples/l3fwd-power/main.c
index e27b8531b5..ef2a086572 100644
--- 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:
-- 
2.33.0

Re: [PATCH 2/2] examples/l3fwd-power: support specify link speed

[fengchengwen]

Reviewed-by: Chengwen Feng <fengchengwen@huawei.com>

On 8/27/2025 9:31 AM, Dengdui Huang wrote:
> 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>

Re: [PATCH 1/2] examples/l3fwd: support specify link speed

[fengchengwen]

Reviewed-by: Chengwen Feng <fengchengwen@huawei.com>

On 8/27/2025 9:31 AM, Dengdui Huang wrote:
> Currently, l3fwd 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>