diff mbox series

[v6] app/testpmd: fix setting maximum packet length

Message ID 20210128120708.533872-1-ferruh.yigit@intel.com (mailing list archive)
State Accepted, archived
Delegated to: Ferruh Yigit
Headers show
Series [v6] app/testpmd: fix setting maximum packet length | expand

Checks

Context Check Description
ci/iol-testing fail Testing issues
ci/iol-abi-testing success Testing PASS
ci/iol-intel-Performance success Performance Testing PASS
ci/iol-broadcom-Functional success Functional Testing PASS
ci/iol-broadcom-Performance success Performance Testing PASS
ci/checkpatch success coding style OK

Commit Message

Ferruh Yigit Jan. 28, 2021, 12:07 p.m. UTC
From: Steve Yang <stevex.yang@intel.com>

"port config all max-pkt-len" command fails because it doesn't set the
'DEV_RX_OFFLOAD_JUMBO_FRAME' offload flag properly.

Commit in the fixes line moved the 'DEV_RX_OFFLOAD_JUMBO_FRAME' offload
flag update from 'cmd_config_max_pkt_len_parsed()' to 'init_config()'.
'init_config()' function is only called during testpmd startup, but the
flag status needs to be calculated whenever 'max_rx_pkt_len' changes.

The issue can be reproduced as [1], where the 'max-pkt-len' reduced and
'DEV_RX_OFFLOAD_JUMBO_FRAME' offload flag should be cleared but it
didn't.

Adding the 'update_jumbo_frame_offload()' helper function to update
'DEV_RX_OFFLOAD_JUMBO_FRAME' offload flag and 'max_rx_pkt_len'. This
function is called both by 'init_config()' and
'cmd_config_max_pkt_len_parsed()'.

Default 'max-pkt-len' value set to zero, 'update_jumbo_frame_offload()'
updates it to "RTE_ETHER_MTU + PMD specific Ethernet overhead" when it
is zero.
If '--max-pkt-len=N' argument provided, it will be used instead.
And with each "port config all max-pkt-len" command, the
'DEV_RX_OFFLOAD_JUMBO_FRAME' offload flag, 'max-pkt-len' and MTU is
updated.

[1]
--------------------------------------------------------------------------
dpdk-testpmd -c 0xf -n 4 -- -i --max-pkt-len=9000 --tx-offloads=0x8000
	--rxq=4 --txq=4 --disable-rss
testpmd>  set verbose 3
testpmd>  port stop all
testpmd>  port config all max-pkt-len 1518
testpmd>  port start all

// Got fail error info without this patch
Configuring Port 0 (socket 1)
Ethdev port_id=0 rx_queue_id=0, new added offloads 0x800 must be
within per-queue offload capabilities 0x0 in rte_eth_rx_queue_setup()
Fail to configure port 0 rx queues //<-- Fail error info;
--------------------------------------------------------------------------

Bugzilla ID: 625
Fixes: 761c4d66900f ("app/testpmd: fix max Rx packet length for VLAN packets")
Cc: stable@dpdk.org

Signed-off-by: Steve Yang <stevex.yang@intel.com>
Signed-off-by: Ferruh Yigit <ferruh.yigit@intel.com>
Acked-by: Lance Richardson <lance.richardson@broadcom.com>
Acked-by: Wisam Jaddo <wisamm@nvidia.com>
Acked-by: Xiaoyun Li <xiaoyun.li@intel.com>
Tested-by: Bo Chen <box.c.chen@intel.com>
---
v5:
* 'update_jumbo_frame_offload()' helper updated
  * check zero 'max-pkt-len' value
  * Update how queue offload flags updated
  * Update MTU if JUMBO_FRAME flag is not set
* Default testpmd 'max-pkt-len' value set to zero

Cc: lance.richardson@broadcom.com
Cc: oulijun@huawei.com
Cc: wisamm@mellanox.com
Cc: lihuisong@huawei.com

v6:
* Comment wording updated
* Bugzilla id added to the commit log
---
 app/test-pmd/cmdline.c |  13 ++++++
 app/test-pmd/testpmd.c | 102 +++++++++++++++++++++++++++++++++--------
 app/test-pmd/testpmd.h |   1 +
 3 files changed, 97 insertions(+), 19 deletions(-)

Comments

Ferruh Yigit Jan. 29, 2021, 9:34 a.m. UTC | #1
On 1/28/2021 12:07 PM, Ferruh Yigit wrote:
> From: Steve Yang <stevex.yang@intel.com>
> 
> "port config all max-pkt-len" command fails because it doesn't set the
> 'DEV_RX_OFFLOAD_JUMBO_FRAME' offload flag properly.
> 
> Commit in the fixes line moved the 'DEV_RX_OFFLOAD_JUMBO_FRAME' offload
> flag update from 'cmd_config_max_pkt_len_parsed()' to 'init_config()'.
> 'init_config()' function is only called during testpmd startup, but the
> flag status needs to be calculated whenever 'max_rx_pkt_len' changes.
> 
> The issue can be reproduced as [1], where the 'max-pkt-len' reduced and
> 'DEV_RX_OFFLOAD_JUMBO_FRAME' offload flag should be cleared but it
> didn't.
> 
> Adding the 'update_jumbo_frame_offload()' helper function to update
> 'DEV_RX_OFFLOAD_JUMBO_FRAME' offload flag and 'max_rx_pkt_len'. This
> function is called both by 'init_config()' and
> 'cmd_config_max_pkt_len_parsed()'.
> 
> Default 'max-pkt-len' value set to zero, 'update_jumbo_frame_offload()'
> updates it to "RTE_ETHER_MTU + PMD specific Ethernet overhead" when it
> is zero.
> If '--max-pkt-len=N' argument provided, it will be used instead.
> And with each "port config all max-pkt-len" command, the
> 'DEV_RX_OFFLOAD_JUMBO_FRAME' offload flag, 'max-pkt-len' and MTU is
> updated.
> 
> [1]
> --------------------------------------------------------------------------
> dpdk-testpmd -c 0xf -n 4 -- -i --max-pkt-len=9000 --tx-offloads=0x8000
> 	--rxq=4 --txq=4 --disable-rss
> testpmd>  set verbose 3
> testpmd>  port stop all
> testpmd>  port config all max-pkt-len 1518
> testpmd>  port start all
> 
> // Got fail error info without this patch
> Configuring Port 0 (socket 1)
> Ethdev port_id=0 rx_queue_id=0, new added offloads 0x800 must be
> within per-queue offload capabilities 0x0 in rte_eth_rx_queue_setup()
> Fail to configure port 0 rx queues //<-- Fail error info;
> --------------------------------------------------------------------------
> 
> Bugzilla ID: 625
> Fixes: 761c4d66900f ("app/testpmd: fix max Rx packet length for VLAN packets")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Steve Yang <stevex.yang@intel.com>
> Signed-off-by: Ferruh Yigit <ferruh.yigit@intel.com>
> Acked-by: Lance Richardson <lance.richardson@broadcom.com>
> Acked-by: Wisam Jaddo <wisamm@nvidia.com>
> Acked-by: Xiaoyun Li <xiaoyun.li@intel.com>
> Tested-by: Bo Chen <box.c.chen@intel.com>

Applied to dpdk-next-net/main, thanks.
diff mbox series

Patch

diff --git a/app/test-pmd/cmdline.c b/app/test-pmd/cmdline.c
index c6ace2dd2546..b338f5fe6333 100644
--- a/app/test-pmd/cmdline.c
+++ b/app/test-pmd/cmdline.c
@@ -1877,7 +1877,9 @@  cmd_config_max_pkt_len_parsed(void *parsed_result,
 				__rte_unused void *data)
 {
 	struct cmd_config_max_pkt_len_result *res = parsed_result;
+	uint32_t max_rx_pkt_len_backup = 0;
 	portid_t pid;
+	int ret;
 
 	if (!all_ports_stopped()) {
 		printf("Please stop all ports first\n");
@@ -1896,7 +1898,18 @@  cmd_config_max_pkt_len_parsed(void *parsed_result,
 			if (res->value == port->dev_conf.rxmode.max_rx_pkt_len)
 				return;
 
+			ret = eth_dev_info_get_print_err(pid, &port->dev_info);
+			if (ret != 0) {
+				printf("rte_eth_dev_info_get() failed for port %u\n",
+					pid);
+				return;
+			}
+
+			max_rx_pkt_len_backup = port->dev_conf.rxmode.max_rx_pkt_len;
+
 			port->dev_conf.rxmode.max_rx_pkt_len = res->value;
+			if (update_jumbo_frame_offload(pid) != 0)
+				port->dev_conf.rxmode.max_rx_pkt_len = max_rx_pkt_len_backup;
 		} else {
 			printf("Unknown parameter\n");
 			return;
diff --git a/app/test-pmd/testpmd.c b/app/test-pmd/testpmd.c
index c256e719aea2..555852ae5e42 100644
--- a/app/test-pmd/testpmd.c
+++ b/app/test-pmd/testpmd.c
@@ -443,8 +443,11 @@  lcoreid_t latencystats_lcore_id = -1;
  * Ethernet device configuration.
  */
 struct rte_eth_rxmode rx_mode = {
-	.max_rx_pkt_len = RTE_ETHER_MAX_LEN,
-		/**< Default maximum frame length. */
+	/* Default maximum frame length.
+	 * Zero is converted to "RTE_ETHER_MTU + PMD Ethernet overhead"
+	 * in init_config().
+	 */
+	.max_rx_pkt_len = 0,
 };
 
 struct rte_eth_txmode tx_mode = {
@@ -1410,7 +1413,6 @@  init_config(void)
 	struct rte_gro_param gro_param;
 	uint32_t gso_types;
 	uint16_t data_size;
-	uint16_t eth_overhead;
 	bool warning = 0;
 	int k;
 	int ret;
@@ -1447,22 +1449,10 @@  init_config(void)
 			rte_exit(EXIT_FAILURE,
 				 "rte_eth_dev_info_get() failed\n");
 
-		/* Update the max_rx_pkt_len to have MTU as RTE_ETHER_MTU */
-		if (port->dev_info.max_mtu != UINT16_MAX &&
-		    port->dev_info.max_rx_pktlen > port->dev_info.max_mtu)
-			eth_overhead = port->dev_info.max_rx_pktlen -
-				port->dev_info.max_mtu;
-		else
-			eth_overhead =
-				RTE_ETHER_HDR_LEN + RTE_ETHER_CRC_LEN;
-
-		if (port->dev_conf.rxmode.max_rx_pkt_len <=
-			(uint32_t)(RTE_ETHER_MTU + eth_overhead))
-			port->dev_conf.rxmode.max_rx_pkt_len =
-					RTE_ETHER_MTU + eth_overhead;
-		else
-			port->dev_conf.rxmode.offloads |=
-					DEV_RX_OFFLOAD_JUMBO_FRAME;
+		ret = update_jumbo_frame_offload(pid);
+		if (ret != 0)
+			printf("Updating jumbo frame offload failed for port %u\n",
+				pid);
 
 		if (!(port->dev_info.tx_offload_capa &
 		      DEV_TX_OFFLOAD_MBUF_FAST_FREE))
@@ -3358,6 +3348,80 @@  rxtx_port_config(struct rte_port *port)
 	}
 }
 
+/*
+ * Helper function to arrange max_rx_pktlen value and JUMBO_FRAME offload,
+ * MTU is also aligned if JUMBO_FRAME offload is not set.
+ *
+ * port->dev_info should be set before calling this function.
+ *
+ * return 0 on success, negative on error
+ */
+int
+update_jumbo_frame_offload(portid_t portid)
+{
+	struct rte_port *port = &ports[portid];
+	uint32_t eth_overhead;
+	uint64_t rx_offloads;
+	int ret;
+	bool on;
+
+	/* Update the max_rx_pkt_len to have MTU as RTE_ETHER_MTU */
+	if (port->dev_info.max_mtu != UINT16_MAX &&
+	    port->dev_info.max_rx_pktlen > port->dev_info.max_mtu)
+		eth_overhead = port->dev_info.max_rx_pktlen -
+				port->dev_info.max_mtu;
+	else
+		eth_overhead = RTE_ETHER_HDR_LEN + RTE_ETHER_CRC_LEN;
+
+	rx_offloads = port->dev_conf.rxmode.offloads;
+
+	/* Default config value is 0 to use PMD specific overhead */
+	if (port->dev_conf.rxmode.max_rx_pkt_len == 0)
+		port->dev_conf.rxmode.max_rx_pkt_len = RTE_ETHER_MTU + eth_overhead;
+
+	if (port->dev_conf.rxmode.max_rx_pkt_len <= RTE_ETHER_MTU + eth_overhead) {
+		rx_offloads &= ~DEV_RX_OFFLOAD_JUMBO_FRAME;
+		on = false;
+	} else {
+		if ((port->dev_info.rx_offload_capa & DEV_RX_OFFLOAD_JUMBO_FRAME) == 0) {
+			printf("Frame size (%u) is not supported by port %u\n",
+				port->dev_conf.rxmode.max_rx_pkt_len,
+				portid);
+			return -1;
+		}
+		rx_offloads |= DEV_RX_OFFLOAD_JUMBO_FRAME;
+		on = true;
+	}
+
+	if (rx_offloads != port->dev_conf.rxmode.offloads) {
+		uint16_t qid;
+
+		port->dev_conf.rxmode.offloads = rx_offloads;
+
+		/* Apply JUMBO_FRAME offload configuration to Rx queue(s) */
+		for (qid = 0; qid < port->dev_info.nb_rx_queues; qid++) {
+			if (on)
+				port->rx_conf[qid].offloads |= DEV_RX_OFFLOAD_JUMBO_FRAME;
+			else
+				port->rx_conf[qid].offloads &= ~DEV_RX_OFFLOAD_JUMBO_FRAME;
+		}
+	}
+
+	/* If JUMBO_FRAME is set MTU conversion done by ethdev layer,
+	 * if unset do it here
+	 */
+	if ((rx_offloads & DEV_RX_OFFLOAD_JUMBO_FRAME) == 0) {
+		ret = rte_eth_dev_set_mtu(portid,
+				port->dev_conf.rxmode.max_rx_pkt_len - eth_overhead);
+		if (ret)
+			printf("Failed to set MTU to %u for port %u\n",
+				port->dev_conf.rxmode.max_rx_pkt_len - eth_overhead,
+				portid);
+	}
+
+	return 0;
+}
+
 void
 init_port_config(void)
 {
diff --git a/app/test-pmd/testpmd.h b/app/test-pmd/testpmd.h
index 5f2316210726..2f8f5a92e46a 100644
--- a/app/test-pmd/testpmd.h
+++ b/app/test-pmd/testpmd.h
@@ -1005,6 +1005,7 @@  uint16_t tx_pkt_set_dynf(uint16_t port_id, __rte_unused uint16_t queue,
 			 __rte_unused void *user_param);
 void add_tx_dynf_callback(portid_t portid);
 void remove_tx_dynf_callback(portid_t portid);
+int update_jumbo_frame_offload(portid_t portid);
 
 /*
  * Work-around of a compilation error with ICC on invocations of the