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>

diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index e1f4a18ebb813f046b9d864309c936889970b568..072e3ee4c93bf2438001bb1a4567ad2d2a501d7a 100644 (file)
--- 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: