net/phy/linkmode.c

1 // SPDX-License-Identifier: GPL-2.0+
5  * linkmode_resolve_pause - resolve the allowable pause modes
15  *  Local device  Link partner
19  *    0     1       1     1     TX
21  *    1     X       1     X     TX+RX
47  * linkmode_set_pause - set the pause mode advertisement
49  * @tx: boolean from ethtool struct ethtool_pauseparam tx_pause member
53  * capabilities of provided in @tx and @rx.
56  *  tx rx  Pause AsymDir
62  * Note: this translation from ethtool tx/rx notation to the advertisement
65  * For tx=0 rx=1, meaning transmit is unsupported, receive is supported:
67  *  Local device  Link partner
69  *    1     1       1     0     TX + RX - but we have no TX support.
72  * For tx=1 rx=1, meaning we have the capability to transmit and receive
75  *  Local device  Link partner
77  *    1     0       0     1     Disabled - but since we do support tx and rx,
81  *  rx=1 tx=0 gives Pause+AsymDir advertisement, but we may end up
82  *            resolving to tx+rx pause or only rx pause depending on
84  *  rx=0 tx=1 gives AsymDir only, which will only give tx pause if
86  *  rx=1 tx=1 gives Pause only, which will only allow tx+rx pause
89 void linkmode_set_pause(unsigned long *advertisement, bool tx, bool rx)  in linkmode_set_pause()  argument
93 			 rx ^ tx);  in linkmode_set_pause()