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tg3: Avoid tx lockups on 5755+ devices 

In certain edge conditions, internal tx resources can get corrupted.
This patch enables a bit that will fix the problem.

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>
This commit is contained in:
Matt Carlson 2010-06-05 17:24:31 +00:00 committed by David S. Miller
parent f92d9dc150
commit b1d0521059
2 changed files with 4 additions and 0 deletions
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3
drivers/net/tg3.c
View File

@ -8214,6 +8214,9 @@ static int tg3_reset_hw(struct tg3 *tp, int reset_phy)
}
tp->tx_mode = TX_MODE_ENABLE;
if ((tp->tg3_flags3 & TG3_FLG3_5755_PLUS) ||
GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5906)
tp->tx_mode |= TX_MODE_MBUF_LOCKUP_FIX;
tw32_f(MAC_TX_MODE, tp->tx_mode);
udelay(100);

1
drivers/net/tg3.h
View File

@ -469,6 +469,7 @@
#define TX_MODE_FLOW_CTRL_ENABLE 0x00000010
#define TX_MODE_BIG_BCKOFF_ENABLE 0x00000020
#define TX_MODE_LONG_PAUSE_ENABLE 0x00000040
#define TX_MODE_MBUF_LOCKUP_FIX 0x00000100
#define MAC_TX_STATUS 0x00000460
#define TX_STATUS_XOFFED 0x00000001
#define TX_STATUS_SENT_XOFF 0x00000002