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e1000e: perform 10/100 adaptive IFS only on parts that support it

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Adaptive IFS which involves writing to the Adaptive IFS Throttle register
was being done for all devices supported by the driver even though it is
not supported (i.e. the register doesn't even exist) on some devices.  The
feature is supported on 8257x/82583 and ICH/PCH based devices, but not
on ESB2.

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Bruce Allan 2010-01-07 16:31:35 +00:00 • committed by David S. Miller
parent 29477e249f
commit f464ba87fe
5 changed files with 21 additions and 0 deletions
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14
drivers/net/e1000e/lib.c
View file

@ -1609,6 +1609,11 @@ void e1000e_reset_adaptive(struct e1000_hw *hw)
{
struct e1000_mac_info *mac = &hw->mac;
if (!mac->adaptive_ifs) {
e_dbg("Not in Adaptive IFS mode!\n");
goto out;
}
mac->current_ifs_val = 0;
mac->ifs_min_val = IFS_MIN;
mac->ifs_max_val = IFS_MAX;
@ -1617,6 +1622,8 @@ void e1000e_reset_adaptive(struct e1000_hw *hw)
mac->in_ifs_mode = false;
ew32(AIT, 0);
out:
return;
}
/**
@ -1630,6 +1637,11 @@ void e1000e_update_adaptive(struct e1000_hw *hw)
{
struct e1000_mac_info *mac = &hw->mac;
if (!mac->adaptive_ifs) {
e_dbg("Not in Adaptive IFS mode!\n");
goto out;
}
if ((mac->collision_delta * mac->ifs_ratio) > mac->tx_packet_delta) {
if (mac->tx_packet_delta > MIN_NUM_XMITS) {
mac->in_ifs_mode = true;
@ -1650,6 +1662,8 @@ void e1000e_update_adaptive(struct e1000_hw *hw)
ew32(AIT, 0);
}
}
out:
return;
}
/**