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[TG3]: TSO workaround fixes.

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1.  Add race condition check after netif_stop_queue().  tg3_tx() runs
    without netif_tx_lock and can race with tg3_start_xmit_dma_bug() ->
    tg3_tso_bug().

2.  Firmware TSO in 5703/5704/5705 also have the same TSO limitation,
    i.e. they cannot handle TSO headers bigger than 80 bytes.  Rename
    TG3_FL2_HW_TSO_1_BUG to TG3_FL2_TSO_BUG and set this flag on
    these chips as well.

3.  Update version to 3.74.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michael Chan 2007-02-20 23:25:40 -08:00 committed by David S. Miller
parent ad930650c0
commit 7f62ad5d37
2 changed files with 12 additions and 10 deletions
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20
drivers/net/tg3.c
View file

@ -64,8 +64,8 @@
#define DRV_MODULE_NAME "tg3"
#define PFX DRV_MODULE_NAME ": "
#define DRV_MODULE_VERSION "3.73"
#define DRV_MODULE_RELDATE "February 12, 2007"
#define DRV_MODULE_VERSION "3.74"
#define DRV_MODULE_RELDATE "February 20, 2007"
#define TG3_DEF_MAC_MODE 0
#define TG3_DEF_RX_MODE 0
@ -3993,7 +3993,10 @@ static int tg3_tso_bug(struct tg3 *tp, struct sk_buff *skb)
/* Estimate the number of fragments in the worst case */
if (unlikely(tg3_tx_avail(tp) <= (skb_shinfo(skb)->gso_segs * 3))) {
netif_stop_queue(tp->dev);
return NETDEV_TX_BUSY;
if (tg3_tx_avail(tp) <= (skb_shinfo(skb)->gso_segs * 3))
return NETDEV_TX_BUSY;
netif_wake_queue(tp->dev);
}
segs = skb_gso_segment(skb, tp->dev->features & ~NETIF_F_TSO);
@ -4061,7 +4064,7 @@ static int tg3_start_xmit_dma_bug(struct sk_buff *skb, struct net_device *dev)
hdr_len = ip_tcp_len + tcp_opt_len;
if (unlikely((ETH_HLEN + hdr_len) > 80) &&
(tp->tg3_flags2 & TG3_FLG2_HW_TSO_1_BUG))
(tp->tg3_flags2 & TG3_FLG2_TSO_BUG))
return (tg3_tso_bug(tp, skb));
base_flags |= (TXD_FLAG_CPU_PRE_DMA |
@ -8137,7 +8140,7 @@ static int tg3_set_ringparam(struct net_device *dev, struct ethtool_ringparam *e
(ering->rx_jumbo_pending > TG3_RX_JUMBO_RING_SIZE - 1) ||
(ering->tx_pending > TG3_TX_RING_SIZE - 1) ||
(ering->tx_pending <= MAX_SKB_FRAGS) ||
((tp->tg3_flags2 & TG3_FLG2_HW_TSO_1_BUG) &&
((tp->tg3_flags2 & TG3_FLG2_TSO_BUG) &&
(ering->tx_pending <= (MAX_SKB_FRAGS * 3))))
return -EINVAL;
@ -10557,12 +10560,11 @@ static int __devinit tg3_get_invariants(struct tg3 *tp)
tp->tg3_flags2 |= TG3_FLG2_HW_TSO_2;
tp->tg3_flags2 |= TG3_FLG2_1SHOT_MSI;
} else {
tp->tg3_flags2 |= TG3_FLG2_HW_TSO_1 |
TG3_FLG2_HW_TSO_1_BUG;
tp->tg3_flags2 |= TG3_FLG2_HW_TSO_1 | TG3_FLG2_TSO_BUG;
if (GET_ASIC_REV(tp->pci_chip_rev_id) ==
ASIC_REV_5750 &&
tp->pci_chip_rev_id >= CHIPREV_ID_5750_C2)
tp->tg3_flags2 &= ~TG3_FLG2_HW_TSO_1_BUG;
tp->tg3_flags2 &= ~TG3_FLG2_TSO_BUG;
}
}
@ -11867,7 +11869,7 @@ static int __devinit tg3_init_one(struct pci_dev *pdev,
(tp->tg3_flags & TG3_FLAG_ENABLE_ASF) != 0) {
tp->tg3_flags2 &= ~TG3_FLG2_TSO_CAPABLE;
} else {
tp->tg3_flags2 |= TG3_FLG2_TSO_CAPABLE;
tp->tg3_flags2 |= TG3_FLG2_TSO_CAPABLE | TG3_FLG2_TSO_BUG;
}
/* TSO is on by default on chips that support hardware TSO.

2
drivers/net/tg3.h
View file

@ -2227,7 +2227,7 @@ struct tg3 {
#define TG3_FLAG_INIT_COMPLETE 0x80000000
u32 tg3_flags2;
#define TG3_FLG2_RESTART_TIMER 0x00000001
#define TG3_FLG2_HW_TSO_1_BUG 0x00000002
#define TG3_FLG2_TSO_BUG 0x00000002
#define TG3_FLG2_NO_ETH_WIRE_SPEED 0x00000004
#define TG3_FLG2_IS_5788 0x00000008
#define TG3_FLG2_MAX_RXPEND_64 0x00000010