---- linux-2.6.24/drivers/net/Kconfig 2008-01-25 02:20:37.000000000 +0100
-+++ linux-2.6.24/drivers/net/Kconfig 2008-02-08 18:12:02.000000000 +0100
-@@ -1709,8 +1709,6 @@
- tristate "TI AR7 CPMAC Ethernet support (EXPERIMENTAL)"
- depends on NET_ETHERNET && EXPERIMENTAL && AR7
- select PHYLIB
-- select FIXED_PHY
-- select FIXED_MII_100_FDX
- help
- TI AR7 CPMAC Ethernet support
-
--- linux-2.6.24/drivers/net/cpmac.c 2008-01-25 02:20:37.000000000 +0100
-+++ linux-2.6.24/drivers/net/cpmac.c 2008-02-08 18:05:35.000000000 +0100
-@@ -661,9 +661,6 @@
++++ linux-2.6.24/drivers/net/cpmac.c 2008-02-08 20:04:58.000000000 +0100
+@@ -38,6 +38,7 @@
+ #include <linux/platform_device.h>
+ #include <linux/dma-mapping.h>
+ #include <asm/gpio.h>
++#include <asm/atomic.h>
+
+ MODULE_AUTHOR("Eugene Konev <ejka@imfi.kspu.ru>");
+ MODULE_DESCRIPTION("TI AR7 ethernet driver (CPMAC)");
+@@ -207,6 +208,7 @@
+ struct work_struct reset_work;
+ struct platform_device *pdev;
+ struct napi_struct napi;
++ atomic_t reset_pending;
+ };
+
+ static irqreturn_t cpmac_irq(int, void *);
+@@ -455,6 +457,9 @@
+ struct cpmac_desc *desc;
+ struct cpmac_priv *priv = netdev_priv(dev);
+
++ if (unlikely(atomic_read(&priv->reset_pending)))
++ return NETDEV_TX_BUSY;
++
+ if (unlikely(skb_padto(skb, ETH_ZLEN)))
+ return NETDEV_TX_OK;
+
+@@ -634,14 +639,14 @@
+ priv->desc_ring[i].dataflags = 0;
+ if (priv->desc_ring[i].skb) {
+ dev_kfree_skb_any(priv->desc_ring[i].skb);
+- if (netif_subqueue_stopped(dev, i))
+- netif_wake_subqueue(dev, i);
++ priv->desc_ring[i].skb = NULL;
+ }
+ }
+ }
+
+ static void cpmac_hw_error(struct work_struct *work)
+ {
++ int i;
+ struct cpmac_priv *priv =
+ container_of(work, struct cpmac_priv, reset_work);
+
+@@ -650,8 +655,46 @@
+ spin_unlock(&priv->rx_lock);
+ cpmac_clear_tx(priv->dev);
+ cpmac_hw_start(priv->dev);
++ barrier();
++ atomic_dec(&priv->reset_pending);
++
++ for (i = 0; i < CPMAC_QUEUES; i++) {
++ netif_wake_subqueue(priv->dev, i);
++ }
++ netif_wake_queue(priv->dev);
++}
++
++static void cpmac_check_status(struct net_device *dev)
++{
++ struct cpmac_priv *priv = netdev_priv(dev);
++
++ u32 macstatus = cpmac_read(priv->regs, CPMAC_MAC_STATUS);
++ int rx_channel = (macstatus >> 8) & 7;
++ int rx_code = (macstatus >> 12) & 15;
++ int tx_channel = (macstatus >> 16) & 7;
++ int tx_code = (macstatus >> 20) & 15;
++
++ if (rx_code || tx_code) {
++ if (netif_msg_drv(priv) && net_ratelimit()) {
++ /* Can't find any documentation on what these error codes actually are.
++ * So just log them and hope..
++ */
++ if (rx_code)
++ printk(KERN_WARNING "%s: host error %d on rx channel %d (macstatus %08x), resetting\n",
++ dev->name, rx_code, rx_channel, macstatus);
++ if (tx_code)
++ printk(KERN_WARNING "%s: host error %d on tx channel %d (macstatus %08x), resetting\n",
++ dev->name, tx_code, tx_channel, macstatus);
++ }
++
++ netif_stop_queue(dev);
++ cpmac_hw_stop(dev);
++ if (schedule_work(&priv->reset_work))
++ atomic_inc(&priv->reset_pending);
++ if (unlikely(netif_msg_hw(priv)))
++ cpmac_dump_regs(dev);
++ }
+ napi_enable(&priv->napi);
+- netif_start_queue(priv->dev);
+ }
+
+ static irqreturn_t cpmac_irq(int irq, void *dev_id)
+@@ -661,9 +704,6 @@
int queue;
u32 status;
priv = netdev_priv(dev);
status = cpmac_read(priv->regs, CPMAC_MAC_INT_VECTOR);
-@@ -848,15 +845,6 @@
+@@ -685,49 +725,33 @@
+
+ cpmac_write(priv->regs, CPMAC_MAC_EOI_VECTOR, 0);
+
+- if (unlikely(status & (MAC_INT_HOST | MAC_INT_STATUS))) {
+- if (netif_msg_drv(priv) && net_ratelimit())
+- printk(KERN_ERR "%s: hw error, resetting...\n",
+- dev->name);
+- netif_stop_queue(dev);
+- napi_disable(&priv->napi);
+- cpmac_hw_stop(dev);
+- schedule_work(&priv->reset_work);
+- if (unlikely(netif_msg_hw(priv)))
+- cpmac_dump_regs(dev);
+- }
++ if (unlikely(status & (MAC_INT_HOST | MAC_INT_STATUS)))
++ cpmac_check_status(dev);
+
+ return IRQ_HANDLED;
+ }
+
+ static void cpmac_tx_timeout(struct net_device *dev)
+ {
+- struct cpmac_priv *priv = netdev_priv(dev);
+ int i;
++ struct cpmac_priv *priv = netdev_priv(dev);
+
+ spin_lock(&priv->lock);
+ dev->stats.tx_errors++;
+ spin_unlock(&priv->lock);
+ if (netif_msg_tx_err(priv) && net_ratelimit())
+ printk(KERN_WARNING "%s: transmit timeout\n", dev->name);
+- /*
+- * FIXME: waking up random queue is not the best thing to
+- * do... on the other hand why we got here at all?
+- */
+-#ifdef CONFIG_NETDEVICES_MULTIQUEUE
+- for (i = 0; i < CPMAC_QUEUES; i++)
+- if (priv->desc_ring[i].skb) {
+- priv->desc_ring[i].dataflags = 0;
+- dev_kfree_skb_any(priv->desc_ring[i].skb);
+- netif_wake_subqueue(dev, i);
+- break;
+- }
+-#else
+- priv->desc_ring[0].dataflags = 0;
+- if (priv->desc_ring[0].skb)
+- dev_kfree_skb_any(priv->desc_ring[0].skb);
+- netif_wake_queue(dev);
+-#endif
++
++ atomic_inc(&priv->reset_pending);
++ barrier();
++ cpmac_clear_tx(dev);
++ barrier();
++ atomic_dec(&priv->reset_pending);
++
++ netif_wake_queue(priv->dev);
++ for (i = 0; i < CPMAC_QUEUES; i++) {
++ netif_wake_subqueue(dev, i);
++ }
+ }
+
+ static int cpmac_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
+@@ -848,15 +872,6 @@
spin_unlock(&priv->lock);
}
static int cpmac_open(struct net_device *dev)
{
int i, size, res;
-@@ -999,11 +987,11 @@
+@@ -923,6 +938,7 @@
+ goto fail_irq;
+ }
+
++ atomic_set(&priv->reset_pending, 0);
+ INIT_WORK(&priv->reset_work, cpmac_hw_error);
+ cpmac_hw_start(dev);
+
+@@ -999,11 +1015,11 @@
static int __devinit cpmac_probe(struct platform_device *pdev)
{
int rc, phy_id, i;
DECLARE_MAC_BUF(mac);
pdata = pdev->dev.platform_data;
-@@ -1017,9 +1005,23 @@
+@@ -1017,9 +1033,23 @@
}
if (phy_id == PHY_MAX_ADDR) {
printk(KERN_ERR "cpmac: no PHY present\n");
return -ENODEV;
}
-@@ -1063,32 +1065,8 @@
+@@ -1063,32 +1093,8 @@
priv->msg_enable = netif_msg_init(debug_level, 0xff);
memcpy(dev->dev_addr, pdata->dev_addr, sizeof(dev->dev_addr));
projects / openwrt / staging / kaloz.git / commitdiff