diff options
| author | Sergey Matyukevich <sergey.matyukevich.os@quantenna.com> | 2017-10-30 13:13:49 +0300 |
|---|---|---|
| committer | Kalle Valo <kvalo@codeaurora.org> | 2017-10-30 12:51:49 +0200 |
| commit | c35c0d54a77d0ff9c101cb3f4e975793f8cb7067 (patch) | |
| tree | 2ad92fa707015f8c7f25968059749e77b91cfd40 /drivers | |
| parent | bf024645ac9df78292e65e939b60c9a58e7b9fbb (diff) | |
qtnfmac: modify full Tx queue recovery
Current recovery approach is to wake s/w Tx queues for skb->dev netdevice.
However this approach doesn't cover the case when h/w queue is full of
packets from a single wireless interface. Suppose xmit attempt from the
second wireless interface fails due to failed reclaim. Then the second
interface will not have a chance to recover even if subsequent reclaims
succeed. Possible solution is to attempt to wake all the s/w queues
belonging to driver interfaces.
Signed-off-by: Sergey Matyukevich <sergey.matyukevich.os@quantenna.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Diffstat (limited to 'drivers')
4 files changed, 37 insertions, 5 deletions
diff --git a/drivers/net/wireless/quantenna/qtnfmac/core.c b/drivers/net/wireless/quantenna/qtnfmac/core.c index aa7f146278a7..6a6e5ffb0348 100644 --- a/drivers/net/wireless/quantenna/qtnfmac/core.c +++ b/drivers/net/wireless/quantenna/qtnfmac/core.c @@ -618,6 +618,33 @@ out: } EXPORT_SYMBOL_GPL(qtnf_classify_skb); +void qtnf_wake_all_queues(struct net_device *ndev) +{ + struct qtnf_vif *vif = qtnf_netdev_get_priv(ndev); + struct qtnf_wmac *mac; + struct qtnf_bus *bus; + int macid; + int i; + + if (unlikely(!vif || !vif->mac || !vif->mac->bus)) + return; + + bus = vif->mac->bus; + + for (macid = 0; macid < QTNF_MAX_MAC; macid++) { + if (!(bus->hw_info.mac_bitmap & BIT(macid))) + continue; + + mac = bus->mac[macid]; + for (i = 0; i < QTNF_MAX_INTF; i++) { + vif = &mac->iflist[i]; + if (vif->netdev && netif_queue_stopped(vif->netdev)) + netif_tx_wake_all_queues(vif->netdev); + } + } +} +EXPORT_SYMBOL_GPL(qtnf_wake_all_queues); + MODULE_AUTHOR("Quantenna Communications"); MODULE_DESCRIPTION("Quantenna 802.11 wireless LAN FullMAC driver."); MODULE_LICENSE("GPL"); diff --git a/drivers/net/wireless/quantenna/qtnfmac/core.h b/drivers/net/wireless/quantenna/qtnfmac/core.h index 49ae700f66f0..da2c24e2271d 100644 --- a/drivers/net/wireless/quantenna/qtnfmac/core.h +++ b/drivers/net/wireless/quantenna/qtnfmac/core.h @@ -153,6 +153,7 @@ int qtnf_cmd_send_get_phy_params(struct qtnf_wmac *mac); struct qtnf_wmac *qtnf_core_get_mac(const struct qtnf_bus *bus, u8 macid); struct net_device *qtnf_classify_skb(struct qtnf_bus *bus, struct sk_buff *skb); +void qtnf_wake_all_queues(struct net_device *ndev); void qtnf_virtual_intf_cleanup(struct net_device *ndev); void qtnf_netdev_updown(struct net_device *ndev, bool up); diff --git a/drivers/net/wireless/quantenna/qtnfmac/pearl/pcie.c b/drivers/net/wireless/quantenna/qtnfmac/pearl/pcie.c index 146e42a132e7..7e487622d87d 100644 --- a/drivers/net/wireless/quantenna/qtnfmac/pearl/pcie.c +++ b/drivers/net/wireless/quantenna/qtnfmac/pearl/pcie.c @@ -617,9 +617,10 @@ static void qtnf_pcie_data_tx_reclaim(struct qtnf_pcie_bus_priv *priv) if (skb->dev) { skb->dev->stats.tx_packets++; skb->dev->stats.tx_bytes += skb->len; - - if (netif_queue_stopped(skb->dev)) - netif_wake_queue(skb->dev); + if (unlikely(priv->tx_stopped)) { + qtnf_wake_all_queues(skb->dev); + priv->tx_stopped = 0; + } } dev_kfree_skb_any(skb); @@ -669,8 +670,10 @@ static int qtnf_pcie_data_tx(struct qtnf_bus *bus, struct sk_buff *skb) spin_lock_irqsave(&priv->tx0_lock, flags); if (!qtnf_tx_queue_ready(priv)) { - if (skb->dev) - netif_stop_queue(skb->dev); + if (skb->dev) { + netif_tx_stop_all_queues(skb->dev); + priv->tx_stopped = 1; + } spin_unlock_irqrestore(&priv->tx0_lock, flags); return NETDEV_TX_BUSY; diff --git a/drivers/net/wireless/quantenna/qtnfmac/pearl/pcie_bus_priv.h b/drivers/net/wireless/quantenna/qtnfmac/pearl/pcie_bus_priv.h index 86ac1ccedb52..397875a50fc2 100644 --- a/drivers/net/wireless/quantenna/qtnfmac/pearl/pcie_bus_priv.h +++ b/drivers/net/wireless/quantenna/qtnfmac/pearl/pcie_bus_priv.h @@ -37,6 +37,7 @@ struct qtnf_pcie_bus_priv { /* lock for tx0 operations */ spinlock_t tx0_lock; u8 msi_enabled; + u8 tx_stopped; int mps; struct workqueue_struct *workqueue; |