diff options
-rw-r--r-- | drivers/net/ethernet/wiznet/w5100.c | 190 | ||||
-rw-r--r-- | drivers/net/ethernet/wiznet/w5100.h | 1 |
2 files changed, 153 insertions, 38 deletions
diff --git a/drivers/net/ethernet/wiznet/w5100.c b/drivers/net/ethernet/wiznet/w5100.c index 89cba6741e7f..42a9de4a48b1 100644 --- a/drivers/net/ethernet/wiznet/w5100.c +++ b/drivers/net/ethernet/wiznet/w5100.c @@ -96,6 +96,13 @@ struct w5100_priv { struct net_device *ndev; bool promisc; u32 msg_enable; + + struct workqueue_struct *xfer_wq; + struct work_struct rx_work; + struct sk_buff *tx_skb; + struct work_struct tx_work; + struct work_struct setrx_work; + struct work_struct restart_work; }; /************************************************************************ @@ -502,10 +509,12 @@ static int w5100_reset(struct w5100_priv *priv) static int w5100_command(struct w5100_priv *priv, u16 cmd) { - unsigned long timeout = jiffies + msecs_to_jiffies(100); + unsigned long timeout; w5100_write(priv, W5100_S0_CR, cmd); + timeout = jiffies + msecs_to_jiffies(100); + while (w5100_read(priv, W5100_S0_CR) != 0) { if (time_after(jiffies, timeout)) return -EIO; @@ -605,7 +614,7 @@ static void w5100_get_regs(struct net_device *ndev, w5100_readbulk(priv, W5100_S0_REGS, buf, W5100_S0_REGS_LEN); } -static void w5100_tx_timeout(struct net_device *ndev) +static void w5100_restart(struct net_device *ndev) { struct w5100_priv *priv = netdev_priv(ndev); @@ -617,12 +626,28 @@ static void w5100_tx_timeout(struct net_device *ndev) netif_wake_queue(ndev); } -static int w5100_start_tx(struct sk_buff *skb, struct net_device *ndev) +static void w5100_restart_work(struct work_struct *work) +{ + struct w5100_priv *priv = container_of(work, struct w5100_priv, + restart_work); + + w5100_restart(priv->ndev); +} + +static void w5100_tx_timeout(struct net_device *ndev) { struct w5100_priv *priv = netdev_priv(ndev); - u16 offset; - netif_stop_queue(ndev); + if (priv->ops->may_sleep) + schedule_work(&priv->restart_work); + else + w5100_restart(ndev); +} + +static void w5100_tx_skb(struct net_device *ndev, struct sk_buff *skb) +{ + struct w5100_priv *priv = netdev_priv(ndev); + u16 offset; offset = w5100_read16(priv, W5100_S0_TX_WR); w5100_writebuf(priv, offset, skb->data, skb->len); @@ -632,47 +657,98 @@ static int w5100_start_tx(struct sk_buff *skb, struct net_device *ndev) dev_kfree_skb(skb); w5100_command(priv, S0_CR_SEND); +} + +static void w5100_tx_work(struct work_struct *work) +{ + struct w5100_priv *priv = container_of(work, struct w5100_priv, + tx_work); + struct sk_buff *skb = priv->tx_skb; + + priv->tx_skb = NULL; + + if (WARN_ON(!skb)) + return; + w5100_tx_skb(priv->ndev, skb); +} + +static int w5100_start_tx(struct sk_buff *skb, struct net_device *ndev) +{ + struct w5100_priv *priv = netdev_priv(ndev); + + netif_stop_queue(ndev); + + if (priv->ops->may_sleep) { + WARN_ON(priv->tx_skb); + priv->tx_skb = skb; + queue_work(priv->xfer_wq, &priv->tx_work); + } else { + w5100_tx_skb(ndev, skb); + } return NETDEV_TX_OK; } -static int w5100_napi_poll(struct napi_struct *napi, int budget) +static struct sk_buff *w5100_rx_skb(struct net_device *ndev) { - struct w5100_priv *priv = container_of(napi, struct w5100_priv, napi); - struct net_device *ndev = priv->ndev; + struct w5100_priv *priv = netdev_priv(ndev); struct sk_buff *skb; - int rx_count; u16 rx_len; u16 offset; u8 header[2]; + u16 rx_buf_len = w5100_read16(priv, W5100_S0_RX_RSR); - for (rx_count = 0; rx_count < budget; rx_count++) { - u16 rx_buf_len = w5100_read16(priv, W5100_S0_RX_RSR); - if (rx_buf_len == 0) - break; + if (rx_buf_len == 0) + return NULL; - offset = w5100_read16(priv, W5100_S0_RX_RD); - w5100_readbuf(priv, offset, header, 2); - rx_len = get_unaligned_be16(header) - 2; - - skb = netdev_alloc_skb_ip_align(ndev, rx_len); - if (unlikely(!skb)) { - w5100_write16(priv, W5100_S0_RX_RD, - offset + rx_buf_len); - w5100_command(priv, S0_CR_RECV); - ndev->stats.rx_dropped++; - return -ENOMEM; - } + offset = w5100_read16(priv, W5100_S0_RX_RD); + w5100_readbuf(priv, offset, header, 2); + rx_len = get_unaligned_be16(header) - 2; - skb_put(skb, rx_len); - w5100_readbuf(priv, offset + 2, skb->data, rx_len); - w5100_write16(priv, W5100_S0_RX_RD, offset + 2 + rx_len); + skb = netdev_alloc_skb_ip_align(ndev, rx_len); + if (unlikely(!skb)) { + w5100_write16(priv, W5100_S0_RX_RD, offset + rx_buf_len); w5100_command(priv, S0_CR_RECV); - skb->protocol = eth_type_trans(skb, ndev); + ndev->stats.rx_dropped++; + return NULL; + } + + skb_put(skb, rx_len); + w5100_readbuf(priv, offset + 2, skb->data, rx_len); + w5100_write16(priv, W5100_S0_RX_RD, offset + 2 + rx_len); + w5100_command(priv, S0_CR_RECV); + skb->protocol = eth_type_trans(skb, ndev); + + ndev->stats.rx_packets++; + ndev->stats.rx_bytes += rx_len; + + return skb; +} + +static void w5100_rx_work(struct work_struct *work) +{ + struct w5100_priv *priv = container_of(work, struct w5100_priv, + rx_work); + struct sk_buff *skb; + + while ((skb = w5100_rx_skb(priv->ndev))) + netif_rx_ni(skb); + + w5100_write(priv, W5100_IMR, IR_S0); +} + +static int w5100_napi_poll(struct napi_struct *napi, int budget) +{ + struct w5100_priv *priv = container_of(napi, struct w5100_priv, napi); + int rx_count; + + for (rx_count = 0; rx_count < budget; rx_count++) { + struct sk_buff *skb = w5100_rx_skb(priv->ndev); - netif_receive_skb(skb); - ndev->stats.rx_packets++; - ndev->stats.rx_bytes += rx_len; + if (skb) + netif_receive_skb(skb); + else + break; } if (rx_count < budget) { @@ -699,10 +775,12 @@ static irqreturn_t w5100_interrupt(int irq, void *ndev_instance) } if (ir & S0_IR_RECV) { - if (napi_schedule_prep(&priv->napi)) { - w5100_write(priv, W5100_IMR, 0); + w5100_write(priv, W5100_IMR, 0); + + if (priv->ops->may_sleep) + queue_work(priv->xfer_wq, &priv->rx_work); + else if (napi_schedule_prep(&priv->napi)) __napi_schedule(&priv->napi); - } } return IRQ_HANDLED; @@ -726,6 +804,14 @@ static irqreturn_t w5100_detect_link(int irq, void *ndev_instance) return IRQ_HANDLED; } +static void w5100_setrx_work(struct work_struct *work) +{ + struct w5100_priv *priv = container_of(work, struct w5100_priv, + setrx_work); + + w5100_hw_start(priv); +} + static void w5100_set_rx_mode(struct net_device *ndev) { struct w5100_priv *priv = netdev_priv(ndev); @@ -733,7 +819,11 @@ static void w5100_set_rx_mode(struct net_device *ndev) if (priv->promisc != set_promisc) { priv->promisc = set_promisc; - w5100_hw_start(priv); + + if (priv->ops->may_sleep) + schedule_work(&priv->setrx_work); + else + w5100_hw_start(priv); } } @@ -872,6 +962,17 @@ int w5100_probe(struct device *dev, const struct w5100_ops *ops, if (err < 0) goto err_register; + priv->xfer_wq = create_workqueue(netdev_name(ndev)); + if (!priv->xfer_wq) { + err = -ENOMEM; + goto err_wq; + } + + INIT_WORK(&priv->rx_work, w5100_rx_work); + INIT_WORK(&priv->tx_work, w5100_tx_work); + INIT_WORK(&priv->setrx_work, w5100_setrx_work); + INIT_WORK(&priv->restart_work, w5100_restart_work); + if (mac_addr) memcpy(ndev->dev_addr, mac_addr, ETH_ALEN); else @@ -889,8 +990,14 @@ int w5100_probe(struct device *dev, const struct w5100_ops *ops, goto err_hw; } - err = request_irq(priv->irq, w5100_interrupt, IRQF_TRIGGER_LOW, - netdev_name(ndev), ndev); + if (ops->may_sleep) { + err = request_threaded_irq(priv->irq, NULL, w5100_interrupt, + IRQF_TRIGGER_LOW | IRQF_ONESHOT, + netdev_name(ndev), ndev); + } else { + err = request_irq(priv->irq, w5100_interrupt, + IRQF_TRIGGER_LOW, netdev_name(ndev), ndev); + } if (err) goto err_hw; @@ -915,6 +1022,8 @@ int w5100_probe(struct device *dev, const struct w5100_ops *ops, err_gpio: free_irq(priv->irq, ndev); err_hw: + destroy_workqueue(priv->xfer_wq); +err_wq: unregister_netdev(ndev); err_register: free_netdev(ndev); @@ -932,6 +1041,11 @@ int w5100_remove(struct device *dev) if (gpio_is_valid(priv->link_gpio)) free_irq(priv->link_irq, ndev); + flush_work(&priv->setrx_work); + flush_work(&priv->restart_work); + flush_workqueue(priv->xfer_wq); + destroy_workqueue(priv->xfer_wq); + unregister_netdev(ndev); free_netdev(ndev); return 0; diff --git a/drivers/net/ethernet/wiznet/w5100.h b/drivers/net/ethernet/wiznet/w5100.h index 39d452d878e7..69045f0f9e10 100644 --- a/drivers/net/ethernet/wiznet/w5100.h +++ b/drivers/net/ethernet/wiznet/w5100.h @@ -8,6 +8,7 @@ */ struct w5100_ops { + bool may_sleep; int (*read)(struct net_device *ndev, u16 addr); int (*write)(struct net_device *ndev, u16 addr, u8 data); int (*read16)(struct net_device *ndev, u16 addr); 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