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authorRasesh Mody <rmody@brocade.com>2010-12-23 21:45:05 +0000
committerDavid S. Miller <davem@davemloft.net>2010-12-25 19:16:01 -0800
commitf7c0fa4cd5dcf58dd95b216d2c33444a3b4a44e0 (patch)
tree5836683f415a5806ffccfbb16bac2ede9980587d /drivers/net/bna
parent886f7fedb0cee56acca7620d89186669273d3d56 (diff)
downloadblackbird-op-linux-f7c0fa4cd5dcf58dd95b216d2c33444a3b4a44e0.tar.gz
blackbird-op-linux-f7c0fa4cd5dcf58dd95b216d2c33444a3b4a44e0.zip
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: Debashis Dutt <ddutt@brocade.com> Signed-off-by: Rasesh Mody <rmody@brocade.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/bna')
-rw-r--r--drivers/net/bna/bnad.c20
-rw-r--r--drivers/net/bna/bnad.h7
-rw-r--r--drivers/net/bna/bnad_ethtool.c4
3 files changed, 25 insertions, 6 deletions
diff --git a/drivers/net/bna/bnad.c b/drivers/net/bna/bnad.c
index 5e7a0307f853..f77593638c57 100644
--- a/drivers/net/bna/bnad.c
+++ b/drivers/net/bna/bnad.c
@@ -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],
diff --git a/drivers/net/bna/bnad.h b/drivers/net/bna/bnad.h
index f59685a5543d..1954dea4cbf2 100644
--- a/drivers/net/bna/bnad.h
+++ b/drivers/net/bna/bnad.h
@@ -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
diff --git a/drivers/net/bna/bnad_ethtool.c b/drivers/net/bna/bnad_ethtool.c
index 3011110c2023..99be5ae91991 100644
--- a/drivers/net/bna/bnad_ethtool.c
+++ b/drivers/net/bna/bnad_ethtool.c
@@ -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++)
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