diff options
| author | Matt Carlson <mcarlson@broadcom.com> | 2007-12-21 05:06:19 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-01-28 23:59:30 +0100 |
| commit | 95937268b7c4c334a3d98f7177c7d5a00b74b2e7 (patch) | |
| tree | ff2be09fd189aac2429c93420421115f427c6a7e | |
| parent | [TG3]: Separate requested and actual flow control parameters (diff) | |
| download | linux-95937268b7c4c334a3d98f7177c7d5a00b74b2e7.tar.xz linux-95937268b7c4c334a3d98f7177c7d5a00b74b2e7.zip | |
[TG3]: Add 1000T & 1000X flowctrl resolvers
This patch adds two new utility functions to resolve flow control. One
function resolves flow control based on 1000-BaseT register definitions.
The other resolves flow control based on 1000-Base X register
definitions.
Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/tg3.c | 86 |
1 files changed, 50 insertions, 36 deletions
diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c index ad0289ab26c9..b571b20ce6ec 100644 --- a/drivers/net/tg3.c +++ b/drivers/net/tg3.c @@ -1612,6 +1612,50 @@ static void tg3_link_report(struct tg3 *tp) } } +static u8 tg3_resolve_flowctrl_1000T(u16 lcladv, u16 rmtadv) +{ + u8 cap = 0; + + if (lcladv & ADVERTISE_PAUSE_CAP) { + if (lcladv & ADVERTISE_PAUSE_ASYM) { + if (rmtadv & LPA_PAUSE_CAP) + cap = TG3_FLOW_CTRL_TX | TG3_FLOW_CTRL_RX; + else if (rmtadv & LPA_PAUSE_ASYM) + cap = TG3_FLOW_CTRL_RX; + } else { + if (rmtadv & LPA_PAUSE_CAP) + cap = TG3_FLOW_CTRL_TX | TG3_FLOW_CTRL_RX; + } + } else if (lcladv & ADVERTISE_PAUSE_ASYM) { + if ((rmtadv & LPA_PAUSE_CAP) && (rmtadv & LPA_PAUSE_ASYM)) + cap = TG3_FLOW_CTRL_TX; + } + + return cap; +} + +static u8 tg3_resolve_flowctrl_1000X(u16 lcladv, u16 rmtadv) +{ + u8 cap = 0; + + if (lcladv & ADVERTISE_1000XPAUSE) { + if (lcladv & ADVERTISE_1000XPSE_ASYM) { + if (rmtadv & LPA_1000XPAUSE) + cap = TG3_FLOW_CTRL_TX | TG3_FLOW_CTRL_RX; + else if (rmtadv & LPA_1000XPAUSE_ASYM) + cap = TG3_FLOW_CTRL_RX; + } else { + if (rmtadv & LPA_1000XPAUSE) + cap = TG3_FLOW_CTRL_TX | TG3_FLOW_CTRL_RX; + } + } else if (lcladv & ADVERTISE_1000XPSE_ASYM) { + if ((rmtadv & LPA_1000XPAUSE) && (rmtadv & LPA_1000XPAUSE_ASYM)) + cap = TG3_FLOW_CTRL_TX; + } + + return cap; +} + static void tg3_setup_flow_control(struct tg3 *tp, u32 local_adv, u32 remote_adv) { u8 new_tg3_flags = 0; @@ -1619,42 +1663,12 @@ static void tg3_setup_flow_control(struct tg3 *tp, u32 local_adv, u32 remote_adv u32 old_tx_mode = tp->tx_mode; if (tp->tg3_flags & TG3_FLAG_PAUSE_AUTONEG) { - - /* Convert 1000BaseX flow control bits to 1000BaseT - * bits before resolving flow control. - */ - if (tp->tg3_flags2 & TG3_FLG2_MII_SERDES) { - local_adv &= ~(ADVERTISE_PAUSE_CAP | - ADVERTISE_PAUSE_ASYM); - remote_adv &= ~(LPA_PAUSE_CAP | LPA_PAUSE_ASYM); - - if (local_adv & ADVERTISE_1000XPAUSE) - local_adv |= ADVERTISE_PAUSE_CAP; - if (local_adv & ADVERTISE_1000XPSE_ASYM) - local_adv |= ADVERTISE_PAUSE_ASYM; - if (remote_adv & LPA_1000XPAUSE) - remote_adv |= LPA_PAUSE_CAP; - if (remote_adv & LPA_1000XPAUSE_ASYM) - remote_adv |= LPA_PAUSE_ASYM; - } - - if (local_adv & ADVERTISE_PAUSE_CAP) { - if (local_adv & ADVERTISE_PAUSE_ASYM) { - if (remote_adv & LPA_PAUSE_CAP) - new_tg3_flags = TG3_FLOW_CTRL_RX | - TG3_FLOW_CTRL_TX; - else if (remote_adv & LPA_PAUSE_ASYM) - new_tg3_flags = TG3_FLOW_CTRL_RX; - } else { - if (remote_adv & LPA_PAUSE_CAP) - new_tg3_flags = TG3_FLOW_CTRL_RX | - TG3_FLOW_CTRL_TX; - } - } else if (local_adv & ADVERTISE_PAUSE_ASYM) { - if ((remote_adv & LPA_PAUSE_CAP) && - (remote_adv & LPA_PAUSE_ASYM)) - new_tg3_flags = TG3_FLOW_CTRL_TX; - } + if (tp->tg3_flags2 & TG3_FLG2_MII_SERDES) + new_tg3_flags = tg3_resolve_flowctrl_1000X(local_adv, + remote_adv); + else + new_tg3_flags = tg3_resolve_flowctrl_1000T(local_adv, + remote_adv); } else { new_tg3_flags = tp->link_config.flowctrl; } |