diff options
| author | Matt Carlson <mcarlson@broadcom.com> | 2009-11-13 13:03:35 (GMT) |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-11-16 06:14:37 (GMT) |
| commit | 24f4efd4e6c89a4093d0b8653d6669e45de45001 (patch) | |
| tree | 98b671463db5330ae239266844412a1636668377 /drivers/net | |
| parent | 87668d352aa8d135bd695a050f18bbfc7b50b506 (diff) | |
| download | linux-fsl-qoriq-24f4efd4e6c89a4093d0b8653d6669e45de45001.tar.xz | |
tg3: Napify tg3_start_xmit_dma_bug()
This patch converts tg3_start_xmit_dma_bug() to accomodate multiple NAPI
instances. This is prep work for a later patch in this series.
Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Reviewed-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/tg3.c | 32 |
1 files changed, 19 insertions, 13 deletions
diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c index e1f4a18..072e3ee 100644 --- a/drivers/net/tg3.c +++ b/drivers/net/tg3.c @@ -5119,11 +5119,11 @@ static inline int tg3_40bit_overflow_test(struct tg3 *tp, dma_addr_t mapping, static void tg3_set_txd(struct tg3_napi *, int, dma_addr_t, int, u32, u32); /* Workaround 4GB and 40-bit hardware DMA bugs. */ -static int tigon3_dma_hwbug_workaround(struct tg3 *tp, struct sk_buff *skb, - u32 last_plus_one, u32 *start, - u32 base_flags, u32 mss) +static int tigon3_dma_hwbug_workaround(struct tg3_napi *tnapi, + struct sk_buff *skb, u32 last_plus_one, + u32 *start, u32 base_flags, u32 mss) { - struct tg3_napi *tnapi = &tp->napi[0]; + struct tg3 *tp = tnapi->tp; struct sk_buff *new_skb; dma_addr_t new_addr = 0; u32 entry = *start; @@ -5392,9 +5392,13 @@ static netdev_tx_t tg3_start_xmit_dma_bug(struct sk_buff *skb, struct skb_shared_info *sp; int would_hit_hwbug; dma_addr_t mapping; - struct tg3_napi *tnapi = &tp->napi[0]; + struct tg3_napi *tnapi; + struct netdev_queue *txq; - len = skb_headlen(skb); + txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb)); + tnapi = &tp->napi[skb_get_queue_mapping(skb)]; + if (tp->tg3_flags2 & TG3_FLG2_USING_MSIX) + tnapi++; /* We are running in BH disabled context with netif_tx_lock * and TX reclaim runs via tp->napi.poll inside of a software @@ -5402,8 +5406,8 @@ static netdev_tx_t tg3_start_xmit_dma_bug(struct sk_buff *skb, * no IRQ context deadlocks to worry about either. Rejoice! */ if (unlikely(tg3_tx_avail(tnapi) <= (skb_shinfo(skb)->nr_frags + 1))) { - if (!netif_queue_stopped(dev)) { - netif_stop_queue(dev); + if (!netif_tx_queue_stopped(txq)) { + netif_tx_stop_queue(txq); /* This is a hard error, log it. */ printk(KERN_ERR PFX "%s: BUG! Tx Ring full when " @@ -5416,7 +5420,7 @@ static netdev_tx_t tg3_start_xmit_dma_bug(struct sk_buff *skb, base_flags = 0; if (skb->ip_summed == CHECKSUM_PARTIAL) base_flags |= TXD_FLAG_TCPUDP_CSUM; - mss = 0; + if ((mss = skb_shinfo(skb)->gso_size) != 0) { struct iphdr *iph; u32 tcp_opt_len, ip_tcp_len, hdr_len; @@ -5488,6 +5492,8 @@ static netdev_tx_t tg3_start_xmit_dma_bug(struct sk_buff *skb, would_hit_hwbug = 0; + len = skb_headlen(skb); + if ((tp->tg3_flags3 & TG3_FLG3_SHORT_DMA_BUG) && len <= 8) would_hit_hwbug = 1; @@ -5553,7 +5559,7 @@ static netdev_tx_t tg3_start_xmit_dma_bug(struct sk_buff *skb, /* If the workaround fails due to memory/mapping * failure, silently drop this packet. */ - if (tigon3_dma_hwbug_workaround(tp, skb, last_plus_one, + if (tigon3_dma_hwbug_workaround(tnapi, skb, last_plus_one, &start, base_flags, mss)) goto out_unlock; @@ -5561,13 +5567,13 @@ static netdev_tx_t tg3_start_xmit_dma_bug(struct sk_buff *skb, } /* Packets are ready, update Tx producer idx local and on card. */ - tw32_tx_mbox(MAILBOX_SNDHOST_PROD_IDX_0 + TG3_64BIT_REG_LOW, entry); + tw32_tx_mbox(tnapi->prodmbox, entry); tnapi->tx_prod = entry; if (unlikely(tg3_tx_avail(tnapi) <= (MAX_SKB_FRAGS + 1))) { - netif_stop_queue(dev); + netif_tx_stop_queue(txq); if (tg3_tx_avail(tnapi) > TG3_TX_WAKEUP_THRESH(tnapi)) - netif_wake_queue(tp->dev); + netif_tx_wake_queue(txq); } out_unlock: |