diff options
| author | Prashant Sreedharan <prashant@broadcom.com> | 2014-08-05 16:02:02 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-08-14 10:09:44 +0800 |
| commit | 1695922103a3e874bd942e1197f9e413fba20943 (patch) | |
| tree | b5ee6f3ccba25c282eedbfaf7cde1377056b7971 | |
| parent | c5d05276f7714c449c6ab427dc87957af067f83a (diff) | |
tg3: Modify tg3_tso_bug() to handle multiple TX rings
[ Upstream commit 4d8fdc95c60e90d84c8257a0067ff4b1729a3757 ]
tg3_tso_bug() was originally designed to handle only HW TX ring 0, Commit
d3f6f3a1d818410c17445bce4f4caab52eb102f1 ("tg3: Prevent page allocation failure
during TSO workaround") changed the driver logic to use tg3_tso_bug() for all
HW TX rings that are enabled. This patch fixes the regression by modifying
tg3_tso_bug() to handle multiple HW TX rings.
Signed-off-by: Prashant Sreedharan <prashant@broadcom.com>
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/net/ethernet/broadcom/tg3.c | 22 |
1 files changed, 12 insertions, 10 deletions
diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c index 8afa579e7c40..a3dd5dc64f4c 100644 --- a/drivers/net/ethernet/broadcom/tg3.c +++ b/drivers/net/ethernet/broadcom/tg3.c @@ -7830,17 +7830,18 @@ static int tigon3_dma_hwbug_workaround(struct tg3_napi *tnapi, static netdev_tx_t tg3_start_xmit(struct sk_buff *, struct net_device *); -/* Use GSO to workaround a rare TSO bug that may be triggered when the - * TSO header is greater than 80 bytes. +/* Use GSO to workaround all TSO packets that meet HW bug conditions + * indicated in tg3_tx_frag_set() */ -static int tg3_tso_bug(struct tg3 *tp, struct sk_buff *skb) +static int tg3_tso_bug(struct tg3 *tp, struct tg3_napi *tnapi, + struct netdev_queue *txq, struct sk_buff *skb) { struct sk_buff *segs, *nskb; u32 frag_cnt_est = skb_shinfo(skb)->gso_segs * 3; /* Estimate the number of fragments in the worst case */ - if (unlikely(tg3_tx_avail(&tp->napi[0]) <= frag_cnt_est)) { - netif_stop_queue(tp->dev); + if (unlikely(tg3_tx_avail(tnapi) <= frag_cnt_est)) { + netif_tx_stop_queue(txq); /* netif_tx_stop_queue() must be done before checking * checking tx index in tg3_tx_avail() below, because in @@ -7848,13 +7849,14 @@ static int tg3_tso_bug(struct tg3 *tp, struct sk_buff *skb) * netif_tx_queue_stopped(). */ smp_mb(); - if (tg3_tx_avail(&tp->napi[0]) <= frag_cnt_est) + if (tg3_tx_avail(tnapi) <= frag_cnt_est) return NETDEV_TX_BUSY; - netif_wake_queue(tp->dev); + netif_tx_wake_queue(txq); } - segs = skb_gso_segment(skb, tp->dev->features & ~(NETIF_F_TSO | NETIF_F_TSO6)); + segs = skb_gso_segment(skb, tp->dev->features & + ~(NETIF_F_TSO | NETIF_F_TSO6)); if (IS_ERR(segs) || !segs) goto tg3_tso_bug_end; @@ -7930,7 +7932,7 @@ static netdev_tx_t tg3_start_xmit(struct sk_buff *skb, struct net_device *dev) if (!skb_is_gso_v6(skb)) { if (unlikely((ETH_HLEN + hdr_len) > 80) && tg3_flag(tp, TSO_BUG)) - return tg3_tso_bug(tp, skb); + return tg3_tso_bug(tp, tnapi, txq, skb); ip_csum = iph->check; ip_tot_len = iph->tot_len; @@ -8061,7 +8063,7 @@ static netdev_tx_t tg3_start_xmit(struct sk_buff *skb, struct net_device *dev) iph->tot_len = ip_tot_len; } tcph->check = tcp_csum; - return tg3_tso_bug(tp, skb); + return tg3_tso_bug(tp, tnapi, txq, skb); } /* If the workaround fails due to memory/mapping |