diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/wireless/libertas/dev.h | 5 | ||||
| -rw-r--r-- | drivers/net/wireless/libertas/main.c | 24 | ||||
| -rw-r--r-- | drivers/net/wireless/libertas/tx.c | 103 |
3 files changed, 71 insertions, 61 deletions
diff --git a/drivers/net/wireless/libertas/dev.h b/drivers/net/wireless/libertas/dev.h index 04cf33da589..468140512a6 100644 --- a/drivers/net/wireless/libertas/dev.h +++ b/drivers/net/wireless/libertas/dev.h @@ -164,7 +164,10 @@ struct lbs_private { struct mutex lock; - u8 tmptxbuf[LBS_UPLD_SIZE]; + /* TX packet ready to be sent... */ + int tx_pending_len; /* -1 while building packet */ + + u8 tx_pending_buf[LBS_UPLD_SIZE]; /* protected by hard_start_xmit serialization */ /** command-related variables */ diff --git a/drivers/net/wireless/libertas/main.c b/drivers/net/wireless/libertas/main.c index 42b64b5ad08..f16c93ba6ef 100644 --- a/drivers/net/wireless/libertas/main.c +++ b/drivers/net/wireless/libertas/main.c @@ -739,6 +739,8 @@ static int lbs_thread(void *data) shouldsleep = 0; /* Interrupt pending. Deal with it now */ else if (priv->dnld_sent) shouldsleep = 1; /* Something is en route to the device already */ + else if (priv->tx_pending_len > 0) + shouldsleep = 0; /* We've a packet to send */ else if (priv->cur_cmd) shouldsleep = 1; /* Can't send a command; one already running */ else if (!list_empty(&priv->cmdpendingq)) @@ -852,6 +854,28 @@ static int lbs_thread(void *data) */ if (!list_empty(&priv->cmdpendingq)) wake_up_all(&priv->cmd_pending); + + spin_lock_irq(&priv->driver_lock); + if (!priv->dnld_sent && priv->tx_pending_len > 0) { + int ret = priv->hw_host_to_card(priv, MVMS_DAT, + priv->tx_pending_buf, + priv->tx_pending_len); + if (ret) { + lbs_deb_tx("host_to_card failed %d\n", ret); + priv->dnld_sent = DNLD_RES_RECEIVED; + } + priv->tx_pending_len = 0; + if (!priv->currenttxskb) { + /* We can wake the queues immediately if we aren't + waiting for TX feedback */ + if (priv->connect_status == LBS_CONNECTED) + netif_wake_queue(priv->dev); + if (priv->mesh_dev && + priv->mesh_connect_status == LBS_CONNECTED) + netif_wake_queue(priv->mesh_dev); + } + } + spin_unlock_irq(&priv->driver_lock); } del_timer(&priv->command_timer); diff --git a/drivers/net/wireless/libertas/tx.c b/drivers/net/wireless/libertas/tx.c index 300aa05edeb..e2141f0a67d 100644 --- a/drivers/net/wireless/libertas/tx.c +++ b/drivers/net/wireless/libertas/tx.c @@ -67,39 +67,45 @@ int lbs_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) lbs_deb_enter(LBS_DEB_TX); - ret = NETDEV_TX_BUSY; - - if (priv->dnld_sent) { - lbs_pr_alert( "TX error: dnld_sent = %d, not sending\n", - priv->dnld_sent); - goto done; - } - - if (priv->currenttxskb) { - lbs_pr_err("%s while TX skb pending\n", __func__); - goto done; - } + ret = NETDEV_TX_OK; - if ((priv->psstate == PS_STATE_SLEEP) || - (priv->psstate == PS_STATE_PRE_SLEEP)) { - lbs_pr_alert("TX error: packet xmit in %ssleep mode\n", - priv->psstate == PS_STATE_SLEEP?"":"pre-"); - goto done; - } + /* We need to protect against the queues being restarted before + we get round to stopping them */ + spin_lock_irqsave(&priv->driver_lock, flags); if (priv->surpriseremoved) - goto drop; + goto free; if (!skb->len || (skb->len > MRVDRV_ETH_TX_PACKET_BUFFER_SIZE)) { lbs_deb_tx("tx err: skb length %d 0 or > %zd\n", skb->len, MRVDRV_ETH_TX_PACKET_BUFFER_SIZE); /* We'll never manage to send this one; drop it and return 'OK' */ - goto drop; + + priv->stats.tx_dropped++; + priv->stats.tx_errors++; + goto free; + } + + + netif_stop_queue(priv->dev); + if (priv->mesh_dev) + netif_stop_queue(priv->mesh_dev); + + if (priv->tx_pending_len) { + /* This can happen if packets come in on the mesh and eth + device simultaneously -- there's no mutual exclusion on + hard_start_xmit() calls between devices. */ + lbs_deb_tx("Packet on %s while busy\n", dev->name); + ret = NETDEV_TX_BUSY; + goto unlock; } + priv->tx_pending_len = -1; + spin_unlock_irqrestore(&priv->driver_lock, flags); + lbs_deb_hex(LBS_DEB_TX, "TX Data", skb->data, min_t(unsigned int, skb->len, 100)); - txpd = (void *)priv->tmptxbuf; + txpd = (void *)priv->tx_pending_buf; memset(txpd, 0, sizeof(struct txpd)); p802x_hdr = skb->data; @@ -134,54 +140,31 @@ int lbs_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) memcpy(&txpd[1], p802x_hdr, le16_to_cpu(txpd->tx_packet_length)); - /* We need to protect against the queues being restarted before - we get round to stopping them */ spin_lock_irqsave(&priv->driver_lock, flags); + priv->tx_pending_len = pkt_len + sizeof(struct txpd); - ret = priv->hw_host_to_card(priv, MVMS_DAT, priv->tmptxbuf, - pkt_len + sizeof(struct txpd)); - - if (!ret) { - lbs_deb_tx("%s succeeds\n", __func__); - - /* Stop processing outgoing pkts before submitting */ - netif_stop_queue(priv->dev); - if (priv->mesh_dev) - netif_stop_queue(priv->mesh_dev); - - priv->stats.tx_packets++; - priv->stats.tx_bytes += skb->len; - - dev->trans_start = jiffies; + lbs_deb_tx("%s lined up packet\n", __func__); - if (priv->monitormode != LBS_MONITOR_OFF) { - /* Keep the skb to echo it back once Tx feedback is - received from FW */ - skb_orphan(skb); + priv->stats.tx_packets++; + priv->stats.tx_bytes += skb->len; - /* Keep the skb around for when we get feedback */ - priv->currenttxskb = skb; - } else - dev_kfree_skb_any(skb); - - } - - spin_unlock_irqrestore(&priv->driver_lock, flags); + dev->trans_start = jiffies; - if (ret) { - lbs_deb_tx("tx err: hw_host_to_card returned 0x%X\n", ret); -drop: - priv->stats.tx_dropped++; - priv->stats.tx_errors++; + if (priv->monitormode != LBS_MONITOR_OFF) { + /* Keep the skb to echo it back once Tx feedback is + received from FW */ + skb_orphan(skb); + /* Keep the skb around for when we get feedback */ + priv->currenttxskb = skb; + } else { + free: dev_kfree_skb_any(skb); } + unlock: + spin_unlock_irqrestore(&priv->driver_lock, flags); + wake_up(&priv->waitq); - /* Even if we dropped the packet, return OK. Otherwise the - packet gets requeued. */ - ret = NETDEV_TX_OK; - -done: lbs_deb_leave_args(LBS_DEB_TX, "ret %d", ret); return ret; } |