mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2025-02-10 20:35:34 +07:00
45 lines
1.5 KiB
C
45 lines
1.5 KiB
C
|
// SPDX-License-Identifier: GPL-2.0+
|
||
|
|
#include <linux/linkmode.h>
|
||
|
|
|
||
|
|
/**
|
||
|
|
* linkmode_resolve_pause - resolve the allowable pause modes
|
||
|
|
* @local_adv: local advertisement in ethtool format
|
||
|
|
* @partner_adv: partner advertisement in ethtool format
|
||
|
|
* @tx_pause: pointer to bool to indicate whether transmit pause should be
|
||
|
|
* enabled.
|
||
|
|
* @rx_pause: pointer to bool to indicate whether receive pause should be
|
||
|
|
* enabled.
|
||
|
|
*
|
||
|
|
* Flow control is resolved according to our and the link partners
|
||
|
|
* advertisements using the following drawn from the 802.3 specs:
|
||
|
|
* Local device Link partner
|
||
|
|
* Pause AsymDir Pause AsymDir Result
|
||
|
|
* 0 X 0 X Disabled
|
||
|
|
* 0 1 1 0 Disabled
|
||
|
|
* 0 1 1 1 TX
|
||
|
|
* 1 0 0 X Disabled
|
||
|
|
* 1 X 1 X TX+RX
|
||
|
|
* 1 1 0 1 RX
|
||
|
|
*/
|
||
|
|
void linkmode_resolve_pause(const unsigned long *local_adv,
|
||
|
|
const unsigned long *partner_adv,
|
||
|
|
bool *tx_pause, bool *rx_pause)
|
||
|
|
{
|
||
|
|
__ETHTOOL_DECLARE_LINK_MODE_MASK(m);
|
||
|
|
|
||
|
|
linkmode_and(m, local_adv, partner_adv);
|
||
|
|
if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, m)) {
|
||
|
|
*tx_pause = true;
|
||
|
|
*rx_pause = true;
|
||
|
|
} else if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, m)) {
|
||
|
|
*tx_pause = linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
|
||
|
|
partner_adv);
|
||
|
|
*rx_pause = linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
|
||
|
|
local_adv);
|
||
|
|
} else {
|
||
|
|
*tx_pause = false;
|
||
|
|
*rx_pause = false;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(linkmode_resolve_pause);
|