ar71xx: fix random wireless mac address on the TEW-632BRP/DIR-615 boards

[openwrt.git] / target / linux / ramips / files / drivers / net / ramips.c

diff --git a/target/linux/ramips/files/drivers/net/ramips.c b/target/linux/ramips/files/drivers/net/ramips.c
index 35c44cc..f9ce272 100644 (file)
--- a/target/linux/ramips/files/drivers/net/ramips.c
+++ b/target/linux/ramips/files/drivers/net/ramips.c
@@ -24,10 +24,11 @@
 #include <linux/etherdevice.h>
 #include <linux/platform_device.h>
 
-#include <eth.h>
+#include <ramips_eth_platform.h>
+#include "ramips_eth.h"
 
 #define TX_TIMEOUT (20 * HZ / 100)
-#define        MAX_RX_LENGTH   1500
+#define        MAX_RX_LENGTH   1600
 
 #ifdef CONFIG_RALINK_RT305X
 #include "ramips_esw.c"
@@ -146,6 +147,8 @@ ramips_eth_hard_start_xmit(struct sk_buff* skb, struct net_device *dev)
        unsigned long tx;
        unsigned int tx_next;
        unsigned int mapped_addr;
+       unsigned long flags;
+
        if(priv->plat->min_pkt_len)
        {
                if(skb->len < priv->plat->min_pkt_len)
@@ -163,33 +166,30 @@ ramips_eth_hard_start_xmit(struct sk_buff* skb, struct net_device *dev)
        mapped_addr = (unsigned int)dma_map_single(NULL, skb->data, skb->len,
                        DMA_TO_DEVICE);
        dma_sync_single_for_device(NULL, mapped_addr, skb->len, DMA_TO_DEVICE);
+       spin_lock_irqsave(&priv->page_lock, flags);
        tx = ramips_fe_rr(RAMIPS_TX_CTX_IDX0);
        if(tx == NUM_TX_DESC - 1)
                tx_next = 0;
        else
                tx_next = tx + 1;
-       if((priv->tx_skb[tx]== 0) && (priv->tx_skb[tx_next] == 0))
-       {
-               if(!(priv->tx[tx].txd2 & TX_DMA_DONE))
-               {
-                       kfree_skb(skb);
-                       dev->stats.tx_dropped++;
-                       printk(KERN_ERR "%s: dropping\n", dev->name);
-                       return 0;
-               }
-               priv->tx[tx].txd1 = virt_to_phys(skb->data);
-               priv->tx[tx].txd2 &= ~(TX_DMA_PLEN0_MASK | TX_DMA_DONE);
-               priv->tx[tx].txd2 |= TX_DMA_PLEN0(skb->len);
-               ramips_fe_wr((tx + 1) % NUM_TX_DESC, RAMIPS_TX_CTX_IDX0);
-               dev->stats.tx_packets++;
-               dev->stats.tx_bytes += skb->len;
-               priv->tx_skb[tx] = skb;
-               ramips_fe_wr((tx + 1) % NUM_TX_DESC, RAMIPS_TX_CTX_IDX0);
-       } else {
-               dev->stats.tx_dropped++;
-               kfree_skb(skb);
-       }
-       return 0;
+       if((priv->tx_skb[tx]) || (priv->tx_skb[tx_next]) ||
+               !(priv->tx[tx].txd2 & TX_DMA_DONE) || !(priv->tx[tx_next].txd2 & TX_DMA_DONE))
+               goto out;
+       priv->tx[tx].txd1 = mapped_addr;
+       priv->tx[tx].txd2 &= ~(TX_DMA_PLEN0_MASK | TX_DMA_DONE);
+       priv->tx[tx].txd2 |= TX_DMA_PLEN0(skb->len);
+       dev->stats.tx_packets++;
+       dev->stats.tx_bytes += skb->len;
+       priv->tx_skb[tx] = skb;
+       wmb();
+       ramips_fe_wr((tx + 1) % NUM_TX_DESC, RAMIPS_TX_CTX_IDX0);
+       spin_unlock_irqrestore(&priv->page_lock, flags);
+       return NETDEV_TX_OK;
+out:
+       spin_unlock_irqrestore(&priv->page_lock, flags);
+       dev->stats.tx_dropped++;
+       kfree_skb(skb);
+       return NETDEV_TX_OK;
 }
 
 static void
@@ -211,7 +211,6 @@ ramips_eth_rx_hw(unsigned long ptr)
 
                rx_skb = priv->rx_skb[rx];
                rx_skb->len = RX_DMA_PLEN0(priv->rx[rx].rxd2);
-               rx_skb->tail = rx_skb->data + rx_skb->len;
                rx_skb->dev = dev;
                rx_skb->protocol = eth_type_trans(rx_skb, dev);
                rx_skb->ip_summed = CHECKSUM_NONE;
@@ -219,7 +218,7 @@ ramips_eth_rx_hw(unsigned long ptr)
                dev->stats.rx_bytes += rx_skb->len;
                netif_rx(rx_skb);
 
-               new_skb = __dev_alloc_skb(MAX_RX_LENGTH + 2, GFP_DMA | GFP_ATOMIC);
+               new_skb = netdev_alloc_skb(dev, MAX_RX_LENGTH + 2);
                priv->rx_skb[rx] = new_skb;
                BUG_ON(!new_skb);
                skb_reserve(new_skb, 2);
@@ -227,6 +226,7 @@ ramips_eth_rx_hw(unsigned long ptr)
                        dma_map_single(NULL, new_skb->data, MAX_RX_LENGTH + 2,
                        DMA_FROM_DEVICE);
                priv->rx[rx].rxd2 &= ~RX_DMA_DONE;
+               wmb();
                ramips_fe_wr(rx, RAMIPS_RX_CALC_IDX0);
        }
        if(max_rx == 0)
@@ -302,10 +302,15 @@ ramips_eth_open(struct net_device *dev)
        struct raeth_priv *priv = netdev_priv(dev);
        int err;
 
-       err = ramips_alloc_dma(dev);
+       err = request_irq(dev->irq, ramips_eth_irq, IRQF_DISABLED,
+                         dev->name, dev);
        if (err)
                return err;
 
+       err = ramips_alloc_dma(dev);
+       if (err)
+               goto err_free_irq;
+
        ramips_setup_dma(dev);
        ramips_fe_wr((ramips_fe_rr(RAMIPS_PDMA_GLO_CFG) & 0xff) |
                (RAMIPS_TX_WB_DDONE | RAMIPS_RX_DMA_EN |
@@ -315,7 +320,6 @@ ramips_eth_open(struct net_device *dev)
                ~(RAMIPS_US_CYC_CNT_MASK << RAMIPS_US_CYC_CNT_SHIFT)) |
                ((rt305x_sys_freq / RAMIPS_US_CYC_CNT_DIVISOR) << RAMIPS_US_CYC_CNT_SHIFT),
                RAMIPS_FE_GLO_CFG);
-       request_irq(dev->irq, ramips_eth_irq, IRQF_DISABLED, dev->name, dev);
        tasklet_init(&priv->tx_housekeeping_tasklet, ramips_eth_tx_housekeeping,
                (unsigned long)dev);
        tasklet_init(&priv->rx_tasklet, ramips_eth_rx_hw, (unsigned long)dev);
@@ -332,6 +336,10 @@ ramips_eth_open(struct net_device *dev)
        ramips_fe_wr(0, RAMIPS_FE_RST_GL);
        netif_start_queue(dev);
        return 0;
+
+ err_free_irq:
+       free_irq(dev->irq, dev);
+       return err;
 }
 
 static int
@@ -367,9 +375,10 @@ ramips_eth_probe(struct net_device *dev)
        dev->stop = ramips_eth_stop;
        dev->hard_start_xmit = ramips_eth_hard_start_xmit;
        dev->set_mac_address = ramips_eth_set_mac_addr;
-       dev->mtu = MAX_RX_LENGTH;
+       dev->mtu = 1500;
        dev->tx_timeout = ramips_eth_timeout;
        dev->watchdog_timeo = TX_TIMEOUT;
+       spin_lock_init(&priv->page_lock);
        return 0;
 }