Hi, Ferruh Yigit
On 2020/1/28 19:27, Ferruh Yigit wrote:
On 1/21/2020 11:44 AM, Wei Hu (Xavier) wrote:
From: "Wei Hu (Xavier)" <xavier.hu...@huawei.com>
Currently, Rx offload capabilities and max_rx_pkt_len in the struct
variable named rte_port are not updated after setting mtu successfully
in port_mtu_set function by 'port config mtu <port_id> <value>' command.
This may lead to reconfig mtu to the initial value in the driver when
recalling rte_eth_dev_configure API interface.
This patch updates Rx offload capabilities and max_rx_pkt_len after
setting mtu successfully when configuring mtu.
Fixes: ae03d0d18adf ("app/testpmd: command to configure MTU")
Cc: sta...@dpdk.org
Signed-off-by: Huisong Li <lihuis...@huawei.com>
Signed-off-by: Wei Hu (Xavier) <xavier.hu...@huawei.com>
---
app/test-pmd/config.c | 18 +++++++++++++++++-
1 file changed, 17 insertions(+), 1 deletion(-)
diff --git a/app/test-pmd/config.c b/app/test-pmd/config.c
index 9669cbd4c..09a1579f5 100644
--- a/app/test-pmd/config.c
+++ b/app/test-pmd/config.c
@@ -1216,7 +1216,9 @@ void
port_mtu_set(portid_t port_id, uint16_t mtu)
{
int diag;
+ struct rte_port *rte_port = &ports[port_id];
struct rte_eth_dev_info dev_info;
+ uint16_t eth_overhead;
int ret;
if (port_id_is_invalid(port_id, ENABLED_WARN))
@@ -1232,8 +1234,22 @@ port_mtu_set(portid_t port_id, uint16_t mtu)
return;
}
diag = rte_eth_dev_set_mtu(port_id, mtu);
- if (diag == 0)
+ if (diag == 0) {
+ /*
+ * Ether overhead in driver is equal to the difference of
+ * max_rx_pktlen and max_mtu in rte_eth_dev_info.
+ */
+ eth_overhead = dev_info.max_rx_pktlen - dev_info.max_mtu;
+ if (mtu > RTE_ETHER_MAX_LEN - eth_overhead)
+ rte_port->dev_conf.rxmode.offloads |=
+ DEV_RX_OFFLOAD_JUMBO_FRAME;
+ else
+ rte_port->dev_conf.rxmode.offloads &=
+ ~DEV_RX_OFFLOAD_JUMBO_FRAME;
If the jumbo frame capability supported or not should be tested before setting
it.
+ rte_port->dev_conf.rxmode.max_rx_pkt_len = mtu + eth_overhead;
May need to check against 'dev_info.max_rx_pktlen', if the 'max_rx_pkt_len' is
bigger than this, it will fail in next configure.
Also some divers already does this in PMD code, should we clean that code or not
is a question.
The snippset is adjusted as follows:
if (mtu > RTE_ETHER_MAX_LEN - eth_overhead && dev_info.rx_offload_capa &
DEV_RX_OFFLOAD_JUMBO_FRAME) {
rte_port->dev_conf.rxmode.offloads |=
DEV_RX_OFFLOAD_JUMBO_FRAME;
rte_port->dev_conf.rxmode.max_rx_pkt_len = mtu + eth_overhead;
} else
rte_port->dev_conf.rxmode.offloads &=
~DEV_RX_OFFLOAD_JUMBO_FRAME;
We only modifies the internal variables of testpmd, don't impact on the
implementation of the driver.
Thanks for more suggestions.
Xavier
