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Commit f7c0fa4c authored by Rasesh Mody's avatar Rasesh Mody Committed by David S. Miller
Browse files

bna: Fix for TX queue 



Change Details:
	- Call netif_wake_queue() if we have freed up sufficient elements
	at the end of completion processing
	- Add netif_queue_stopped counter back to bnad_drv_stats {}
	- Get netif_queue_stopped value from stack
	- Remove BUG_ON() on value returned by pci_unmap_addr()

Signed-off-by: default avatarDebashis Dutt <ddutt@brocade.com>
Signed-off-by: default avatarRasesh Mody <rmody@brocade.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 886f7fed

drivers/net/bna/bnad.c

+16 −4
Original line number Diff line number Diff line
@@ -109,7 +109,7 @@ static void 
bnad_free_all_txbufs(struct bnad *bnad,

		 struct bna_tcb *tcb)

{

	u16 		unmap_cons;

	u32 		unmap_cons;

	struct bnad_unmap_q *unmap_q = tcb->unmap_q;

	struct bnad_skb_unmap *unmap_array;

	struct sk_buff 		*skb = NULL;
@@ -244,7 +244,7 @@ bnad_tx_free_tasklet(unsigned long bnad_ptr) 
{

	struct bnad *bnad = (struct bnad *)bnad_ptr;

	struct bna_tcb *tcb;

	u32 		acked;

	u32 		acked = 0;

	int			i, j;



	for (i = 0; i < bnad->num_tx; i++) {
@@ -263,6 +263,20 @@ bnad_tx_free_tasklet(unsigned long bnad_ptr) 
				smp_mb__before_clear_bit();

				clear_bit(BNAD_TXQ_FREE_SENT, &tcb->flags);

			}

			if (unlikely(!test_bit(BNAD_TXQ_TX_STARTED,

						&tcb->flags)))

				continue;

			if (netif_queue_stopped(bnad->netdev)) {

				if (acked && netif_carrier_ok(bnad->netdev) &&

					BNA_QE_FREE_CNT(tcb, tcb->q_depth) >=

						BNAD_NETIF_WAKE_THRESHOLD) {

					netif_wake_queue(bnad->netdev);

					/* TODO */

					/* Counters for individual TxQs? */

					BNAD_UPDATE_CTR(bnad,

						netif_queue_wakeup);

				}

			}

		}

	}

}
@@ -334,8 +348,6 @@ bnad_free_all_rxbufs(struct bnad *bnad, struct bna_rcb *rcb) 
		skb = unmap_q->unmap_array[unmap_cons].skb;

		if (!skb)

			continue;

		BUG_ON(!(pci_unmap_addr(

			&unmap_q->unmap_array[unmap_cons], dma_addr)));

		unmap_q->unmap_array[unmap_cons].skb = NULL;

		pci_unmap_single(bnad->pcidev, pci_unmap_addr(&unmap_q->

					unmap_array[unmap_cons],

drivers/net/bna/bnad.h

+5 −2
Original line number Diff line number Diff line
@@ -126,6 +126,7 @@ struct bnad_completion { 
struct bnad_drv_stats {

	u64 		netif_queue_stop;

	u64		netif_queue_wakeup;

	u64		netif_queue_stopped;

	u64		tso4;

	u64		tso6;

	u64		tso_err;
@@ -308,8 +309,10 @@ extern void bnad_cleanup_rx(struct bnad *bnad, uint rx_id); 
extern void bnad_dim_timer_start(struct bnad *bnad);



/* Statistics */

extern void bnad_netdev_qstats_fill(struct bnad *bnad, struct rtnl_link_stats64 *stats);

extern void bnad_netdev_hwstats_fill(struct bnad *bnad, struct rtnl_link_stats64 *stats);

extern void bnad_netdev_qstats_fill(struct bnad *bnad,

		struct rtnl_link_stats64 *stats);

extern void bnad_netdev_hwstats_fill(struct bnad *bnad,

		struct rtnl_link_stats64 *stats);



/**

 * MACROS

drivers/net/bna/bnad_ethtool.c

+4 −0
Original line number Diff line number Diff line
@@ -68,6 +68,7 @@ static char *bnad_net_stats_strings[BNAD_ETHTOOL_STATS_NUM] = { 


	"netif_queue_stop",

	"netif_queue_wakeup",

	"netif_queue_stopped",

	"tso4",

	"tso6",

	"tso_err",
@@ -1180,6 +1181,9 @@ bnad_get_ethtool_stats(struct net_device *netdev, struct ethtool_stats *stats, 


	bi = sizeof(*net_stats64) / sizeof(u64);



	/* Get netif_queue_stopped from stack */

	bnad->stats.drv_stats.netif_queue_stopped = netif_queue_stopped(netdev);



	/* Fill driver stats into ethtool buffers */

	stats64 = (u64 *)&bnad->stats.drv_stats;

	for (i = 0; i < sizeof(struct bnad_drv_stats) / sizeof(u64); i++)