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Add a new sysctl option, this will allow one to

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limit the advertised speed of an SFP+ to 1G, effectively
"forcing" link at that lower speed. It is off by default
and is enabled by sysctl dev.ix.0.force_gig=1, 0 will
set it back to the norm.
This commit is contained in:
Jack F Vogel 2010-06-30 01:01:06 +00:00
parent ed4c3b5f86
commit 5f46ec799a
1 changed files with 42 additions and 0 deletions
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42
sys/dev/ixgbe/ixgbe.c
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@ -238,6 +238,15 @@ TUNABLE_INT("hw.ixgbe.rx_process_limit", &ixgbe_rx_process_limit);
static int ixgbe_flow_control = ixgbe_fc_full;
TUNABLE_INT("hw.ixgbe.flow_control", &ixgbe_flow_control);
/*
** These adapters do not really autoneg, but slower
** speed can be set by forcing the advertised value
** to only 1G. Default to 0, set it to 1 to
** force 1G link.
*/
static int ixgbe_force_speed = 0;
TUNABLE_INT("hw.ixgbe.force_speed", &ixgbe_force_speed);
/*
** Smart speed setting, default to on
** this only works as a compile option
@ -464,6 +473,11 @@ ixgbe_attach(device_t dev)
OID_AUTO, "flow_control", CTLTYPE_INT | CTLFLAG_RW,
adapter, 0, ixgbe_set_flowcntl, "I", "Flow Control");
SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
OID_AUTO, "force_gig", CTLTYPE_INT | CTLFLAG_RW,
adapter, 0, ixgbe_set_gigspeed, "I", "Force 1G Speed");
SYSCTL_ADD_INT(device_get_sysctl_ctx(dev),
SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
OID_AUTO, "enable_aim", CTLTYPE_INT|CTLFLAG_RW,
@ -4941,6 +4955,34 @@ ixgbe_sysctl_debug(SYSCTL_HANDLER_ARGS)
return error;
}
/*
** Set link advertisement to 1G:
** 0 - off
** 1 - off
*/
static int
ixgbe_set_gigspeed(SYSCTL_HANDLER_ARGS)
{
struct adapter *adapter;
struct ixgbe_hw *hw;
int error;
error = sysctl_handle_int(oidp, &ixgbe_force_speed, 0, req);
if (error)
return (error);
adapter = (struct adapter *) arg1;
hw = &adapter->hw;
if (ixgbe_force_speed)
hw->phy.autoneg_advertised = IXGBE_LINK_SPEED_1GB_FULL;
else
hw->phy.autoneg_advertised = IXGBE_LINK_SPEED_10GB_FULL;
return error;
}
/*
** Set flow control using sysctl:
** Flow control values: