From mboxrd@z Thu Jan  1 00:00:00 1970
From: bugzilla@dpdk.org
Subject: [Bug 227] Flow control mode on mac Intel Corporation
 I350 Gigabit Network Connection (rev 01) issues
Date: Fri, 15 Mar 2019 13:46:50 +0000
Message-ID: <bug-227-3@http.bugs.dpdk.org/>
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https://bugs.dpdk.org/show_bug.cgi?id=3D227

            Bug ID: 227
           Summary: Flow control mode on mac Intel Corporation I350
                    Gigabit Network Connection (rev 01) issues
           Product: DPDK
           Version: 18.11
          Hardware: x86
                OS: Linux
            Status: CONFIRMED
          Severity: normal
          Priority: Normal
         Component: ethdev
          Assignee: dev@dpdk.org
          Reporter: Aleksey.Rogozhin@infotecs.ru
  Target Milestone: ---

Hi all.

Faced with the problem of changing the flow control mode on the Intel
Corporation I350 Gigabit Network Connection (rev 01). In the following snip=
pet,
the code that sets the flow control mode.

.....
// setup flow control
struct rte_eth_fc_conf fc_conf;
if( 0 !=3D rte_eth_dev_flow_ctrl_get( port, &fc_conf ) )
{
    printf( "cannot get flow ctrl parameters\n" );
}
else
{
    printf( "current flow control mode %d\n", fc_conf.mode );

    fc_conf.mode =3D RTE_FC_NONE;

    printf( "new flow control mode %d\n", fc_conf.mode );

    if( 0 !=3D rte_eth_dev_flow_ctrl_set( port, &fc_conf ) )
    {
        printf( "bad flow contrl parameter\n" );
    }

    if( 0 !=3D rte_eth_dev_flow_ctrl_get( port, &fc_conf ) )
    {
        printf( "cannot get flow ctrl parameters\n" );
    }
    printf( "after setup flow control mode  %d\n", fc_conf.mode );
}
.....

Below is the output that was generated.

.....
current flow control mode 1
new flow control mode 0
after setup flow control mode  1
.....

>>From this it follows that the flow control mode has not been changed.
Also the fact that the MAC has not changed the flow control mode is confirm=
ed
by the fact that the MAC reduces the packet transmission rate when receiving
pause frames.

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