diff options
| author | Matt Carlson <mcarlson@broadcom.com> | 2009-11-02 14:23:27 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-11-02 23:39:00 -0800 |
| commit | 92c6b8d16a36df3f28b2537bed2a56491fb08f11 (patch) | |
| tree | 13f89b031c7c82163233963c24bfe20312ba901e /drivers/net/tg3.c | |
| parent | 0e1406dd404ce55dbe8d68b4b5e2aed7e5c75fdb (diff) | |
| download | blackbird-op-linux-92c6b8d16a36df3f28b2537bed2a56491fb08f11.tar.gz blackbird-op-linux-92c6b8d16a36df3f28b2537bed2a56491fb08f11.zip | |
tg3: Fix 5906 transmit hangs
The 5906 has trouble with fragments that are less than 8 bytes in size.
This patch works around the problem by pivoting the 5906's transmit
routine to tg3_start_xmit_dma_bug() and introducing a new SHORT_DMA_BUG
flag that enables code to detect and react to the problematic condition.
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>
Diffstat (limited to 'drivers/net/tg3.c')
| -rw-r--r-- | drivers/net/tg3.c | 26 |
1 files changed, 19 insertions, 7 deletions
diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c index da808250c866..a7a582e37469 100644 --- a/drivers/net/tg3.c +++ b/drivers/net/tg3.c @@ -5393,7 +5393,7 @@ static netdev_tx_t tg3_start_xmit_dma_bug(struct sk_buff *skb, mss = 0; if ((mss = skb_shinfo(skb)->gso_size) != 0) { struct iphdr *iph; - int tcp_opt_len, ip_tcp_len, hdr_len; + u32 tcp_opt_len, ip_tcp_len, hdr_len; if (skb_header_cloned(skb) && pskb_expand_head(skb, 0, 0, GFP_ATOMIC)) { @@ -5424,8 +5424,10 @@ static netdev_tx_t tg3_start_xmit_dma_bug(struct sk_buff *skb, IPPROTO_TCP, 0); - if ((tp->tg3_flags2 & TG3_FLG2_HW_TSO) || - (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5705)) { + if (tp->tg3_flags2 & TG3_FLG2_HW_TSO_2) + mss |= hdr_len << 9; + else if ((tp->tg3_flags2 & TG3_FLG2_HW_TSO_1) || + GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5705) { if (tcp_opt_len || iph->ihl > 5) { int tsflags; @@ -5460,6 +5462,9 @@ static netdev_tx_t tg3_start_xmit_dma_bug(struct sk_buff *skb, would_hit_hwbug = 0; + if ((tp->tg3_flags3 & TG3_FLG3_SHORT_DMA_BUG) && len <= 8) + would_hit_hwbug = 1; + if ((tp->tg3_flags3 & TG3_FLG3_4G_DMA_BNDRY_BUG) && tg3_4g_overflow_test(mapping, len)) would_hit_hwbug = 1; @@ -5489,6 +5494,10 @@ static netdev_tx_t tg3_start_xmit_dma_bug(struct sk_buff *skb, tnapi->tx_buffers[entry].skb = NULL; + if ((tp->tg3_flags3 & TG3_FLG3_SHORT_DMA_BUG) && + len <= 8) + would_hit_hwbug = 1; + if ((tp->tg3_flags3 & TG3_FLG3_4G_DMA_BNDRY_BUG) && tg3_4g_overflow_test(mapping, len)) would_hit_hwbug = 1; @@ -12625,8 +12634,12 @@ static int __devinit tg3_get_invariants(struct tg3 *tp) } if (!(tp->tg3_flags3 & TG3_FLG3_5755_PLUS)) { - tp->tg3_flags3 |= TG3_FLG3_4G_DMA_BNDRY_BUG; - tp->tg3_flags3 |= TG3_FLG3_40BIT_DMA_LIMIT_BUG; + if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5906) + tp->tg3_flags3 |= TG3_FLG3_SHORT_DMA_BUG; + else { + tp->tg3_flags3 |= TG3_FLG3_4G_DMA_BNDRY_BUG; + tp->tg3_flags3 |= TG3_FLG3_40BIT_DMA_LIMIT_BUG; + } } if (!(tp->tg3_flags2 & TG3_FLG2_5705_PLUS) || @@ -13987,8 +14000,7 @@ static int __devinit tg3_init_one(struct pci_dev *pdev, goto err_out_iounmap; } - if ((tp->tg3_flags3 & TG3_FLG3_5755_PLUS) || - GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5906) + if (tp->tg3_flags3 & TG3_FLG3_5755_PLUS) dev->netdev_ops = &tg3_netdev_ops; else dev->netdev_ops = &tg3_netdev_ops_dma_bug; |
