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path: root/drivers/net/arm/ixp4xx_eth.c
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Diffstat (limited to 'drivers/net/arm/ixp4xx_eth.c')
-rw-r--r--drivers/net/arm/ixp4xx_eth.c26
1 files changed, 14 insertions, 12 deletions
diff --git a/drivers/net/arm/ixp4xx_eth.c b/drivers/net/arm/ixp4xx_eth.c
index 1fcf8388b1c8..6f42ad728915 100644
--- a/drivers/net/arm/ixp4xx_eth.c
+++ b/drivers/net/arm/ixp4xx_eth.c
@@ -456,7 +456,8 @@ static inline void queue_put_desc(unsigned int queue, u32 phys,
456 debug_desc(phys, desc); 456 debug_desc(phys, desc);
457 BUG_ON(phys & 0x1F); 457 BUG_ON(phys & 0x1F);
458 qmgr_put_entry(queue, phys); 458 qmgr_put_entry(queue, phys);
459 BUG_ON(qmgr_stat_overflow(queue)); 459 /* Don't check for queue overflow here, we've allocated sufficient
460 length and queues >= 32 don't support this check anyway. */
460} 461}
461 462
462 463
@@ -512,8 +513,8 @@ static int eth_poll(struct napi_struct *napi, int budget)
512#endif 513#endif
513 napi_complete(napi); 514 napi_complete(napi);
514 qmgr_enable_irq(rxq); 515 qmgr_enable_irq(rxq);
515 if (!qmgr_stat_empty(rxq) && 516 if (!qmgr_stat_below_low_watermark(rxq) &&
516 napi_reschedule(napi)) { 517 napi_reschedule(napi)) { /* not empty again */
517#if DEBUG_RX 518#if DEBUG_RX
518 printk(KERN_DEBUG "%s: eth_poll" 519 printk(KERN_DEBUG "%s: eth_poll"
519 " napi_reschedule successed\n", 520 " napi_reschedule successed\n",
@@ -630,9 +631,9 @@ static void eth_txdone_irq(void *unused)
630 port->tx_buff_tab[n_desc] = NULL; 631 port->tx_buff_tab[n_desc] = NULL;
631 } 632 }
632 633
633 start = qmgr_stat_empty(port->plat->txreadyq); 634 start = qmgr_stat_below_low_watermark(port->plat->txreadyq);
634 queue_put_desc(port->plat->txreadyq, phys, desc); 635 queue_put_desc(port->plat->txreadyq, phys, desc);
635 if (start) { 636 if (start) { /* TX-ready queue was empty */
636#if DEBUG_TX 637#if DEBUG_TX
637 printk(KERN_DEBUG "%s: eth_txdone_irq xmit ready\n", 638 printk(KERN_DEBUG "%s: eth_txdone_irq xmit ready\n",
638 port->netdev->name); 639 port->netdev->name);
@@ -708,13 +709,14 @@ static int eth_xmit(struct sk_buff *skb, struct net_device *dev)
708 queue_put_desc(TX_QUEUE(port->id), tx_desc_phys(port, n), desc); 709 queue_put_desc(TX_QUEUE(port->id), tx_desc_phys(port, n), desc);
709 dev->trans_start = jiffies; 710 dev->trans_start = jiffies;
710 711
711 if (qmgr_stat_empty(txreadyq)) { 712 if (qmgr_stat_below_low_watermark(txreadyq)) { /* empty */
712#if DEBUG_TX 713#if DEBUG_TX
713 printk(KERN_DEBUG "%s: eth_xmit queue full\n", dev->name); 714 printk(KERN_DEBUG "%s: eth_xmit queue full\n", dev->name);
714#endif 715#endif
715 netif_stop_queue(dev); 716 netif_stop_queue(dev);
716 /* we could miss TX ready interrupt */ 717 /* we could miss TX ready interrupt */
717 if (!qmgr_stat_empty(txreadyq)) { 718 /* really empty in fact */
719 if (!qmgr_stat_below_low_watermark(txreadyq)) {
718#if DEBUG_TX 720#if DEBUG_TX
719 printk(KERN_DEBUG "%s: eth_xmit ready again\n", 721 printk(KERN_DEBUG "%s: eth_xmit ready again\n",
720 dev->name); 722 dev->name);
@@ -814,29 +816,29 @@ static int request_queues(struct port *port)
814 int err; 816 int err;
815 817
816 err = qmgr_request_queue(RXFREE_QUEUE(port->id), RX_DESCS, 0, 0, 818 err = qmgr_request_queue(RXFREE_QUEUE(port->id), RX_DESCS, 0, 0,
817 "%s:RX-free", port->netdev->name); 819 "%s:RX-free", port->netdev->name);
818 if (err) 820 if (err)
819 return err; 821 return err;
820 822
821 err = qmgr_request_queue(port->plat->rxq, RX_DESCS, 0, 0, 823 err = qmgr_request_queue(port->plat->rxq, RX_DESCS, 0, 0,
822 "%s:RX", port->netdev->name); 824 "%s:RX", port->netdev->name);
823 if (err) 825 if (err)
824 goto rel_rxfree; 826 goto rel_rxfree;
825 827
826 err = qmgr_request_queue(TX_QUEUE(port->id), TX_DESCS, 0, 0, 828 err = qmgr_request_queue(TX_QUEUE(port->id), TX_DESCS, 0, 0,
827 "%s:TX", port->netdev->name); 829 "%s:TX", port->netdev->name);
828 if (err) 830 if (err)
829 goto rel_rx; 831 goto rel_rx;
830 832
831 err = qmgr_request_queue(port->plat->txreadyq, TX_DESCS, 0, 0, 833 err = qmgr_request_queue(port->plat->txreadyq, TX_DESCS, 0, 0,
832 "%s:TX-ready", port->netdev->name); 834 "%s:TX-ready", port->netdev->name);
833 if (err) 835 if (err)
834 goto rel_tx; 836 goto rel_tx;
835 837
836 /* TX-done queue handles skbs sent out by the NPEs */ 838 /* TX-done queue handles skbs sent out by the NPEs */
837 if (!ports_open) { 839 if (!ports_open) {
838 err = qmgr_request_queue(TXDONE_QUEUE, TXDONE_QUEUE_LEN, 0, 0, 840 err = qmgr_request_queue(TXDONE_QUEUE, TXDONE_QUEUE_LEN, 0, 0,
839 "%s:TX-done", DRV_NAME); 841 "%s:TX-done", DRV_NAME);
840 if (err) 842 if (err)
841 goto rel_txready; 843 goto rel_txready;
842 } 844 }