[ar71xx] WRT160NL: mtd parser cleanup

[openwrt.git] / target / linux / ar71xx / files / drivers / net / ag71xx / ag71xx_main.c

diff --git a/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c
index 973946c..0ba4d55 100644 (file)
--- a/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c
+++ b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c
@@ -1,7 +1,7 @@
 /*
  *  Atheros AR71xx built-in ethernet mac driver
  *
 /*
  *  Atheros AR71xx built-in ethernet mac driver
  *

- *  Copyright (C) 2008 Gabor Juhos <juhosg@openwrt.org>
+ *  Copyright (C) 2008-2009 Gabor Juhos <juhosg@openwrt.org>

  *  Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
  *
  *  Based on Atheros' AG7100 driver
  *  Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
  *
  *  Based on Atheros' AG7100 driver


@@ -11,6 +11,7 @@
  *  by the Free Software Foundation.
  */
 
  *  by the Free Software Foundation.
  */
 

+#include <linux/cache.h>

 #include "ag71xx.h"
 
 #define AG71XX_DEFAULT_MSG_ENABLE      \
 #include "ag71xx.h"
 
 #define AG71XX_DEFAULT_MSG_ENABLE      \


@@ -23,10 +24,25 @@
        | NETIF_MSG_RX_ERR              \
        | NETIF_MSG_TX_ERR )
 
        | NETIF_MSG_RX_ERR              \
        | NETIF_MSG_TX_ERR )
 

-static int ag71xx_debug = -1;
+static int ag71xx_msg_level = -1;

 
 

-module_param(ag71xx_debug, int, 0);
-MODULE_PARM_DESC(ag71xx_debug, "Debug level (-1=defaults,0=none,...,16=all)");
+module_param_named(msg_level, ag71xx_msg_level, int, 0);
+MODULE_PARM_DESC(msg_level, "Message level (-1=defaults,0=none,...,16=all)");
+
+static void ag71xx_dump_dma_regs(struct ag71xx *ag)
+{
+       DBG("%s: dma_tx_ctrl=%08x, dma_tx_desc=%08x, dma_tx_status=%08x\n",
+               ag->dev->name,
+               ag71xx_rr(ag, AG71XX_REG_TX_CTRL),
+               ag71xx_rr(ag, AG71XX_REG_TX_DESC),
+               ag71xx_rr(ag, AG71XX_REG_TX_STATUS));
+
+       DBG("%s: dma_rx_ctrl=%08x, dma_rx_desc=%08x, dma_rx_status=%08x\n",
+               ag->dev->name,
+               ag71xx_rr(ag, AG71XX_REG_RX_CTRL),
+               ag71xx_rr(ag, AG71XX_REG_RX_DESC),
+               ag71xx_rr(ag, AG71XX_REG_RX_STATUS));
+}

 
 static void ag71xx_dump_regs(struct ag71xx *ag)
 {
 
 static void ag71xx_dump_regs(struct ag71xx *ag)
 {


@@ -47,30 +63,50 @@ static void ag71xx_dump_regs(struct ag71xx *ag)
                ag71xx_rr(ag, AG71XX_REG_FIFO_CFG0),
                ag71xx_rr(ag, AG71XX_REG_FIFO_CFG1),
                ag71xx_rr(ag, AG71XX_REG_FIFO_CFG2));
                ag71xx_rr(ag, AG71XX_REG_FIFO_CFG0),
                ag71xx_rr(ag, AG71XX_REG_FIFO_CFG1),
                ag71xx_rr(ag, AG71XX_REG_FIFO_CFG2));

-       DBG("%s: fifo_cfg3=%08x, fifo_cfg3=%08x, fifo_cfg5=%08x\n",
+       DBG("%s: fifo_cfg3=%08x, fifo_cfg4=%08x, fifo_cfg5=%08x\n",

                ag->dev->name,
                ag71xx_rr(ag, AG71XX_REG_FIFO_CFG3),
                ag71xx_rr(ag, AG71XX_REG_FIFO_CFG4),
                ag71xx_rr(ag, AG71XX_REG_FIFO_CFG5));
 }
 
                ag->dev->name,
                ag71xx_rr(ag, AG71XX_REG_FIFO_CFG3),
                ag71xx_rr(ag, AG71XX_REG_FIFO_CFG4),
                ag71xx_rr(ag, AG71XX_REG_FIFO_CFG5));
 }
 

+static inline void ag71xx_dump_intr(struct ag71xx *ag, char *label, u32 intr)
+{
+       DBG("%s: %s intr=%08x %s%s%s%s%s%s\n",
+               ag->dev->name, label, intr,
+               (intr & AG71XX_INT_TX_PS) ? "TXPS " : "",
+               (intr & AG71XX_INT_TX_UR) ? "TXUR " : "",
+               (intr & AG71XX_INT_TX_BE) ? "TXBE " : "",
+               (intr & AG71XX_INT_RX_PR) ? "RXPR " : "",
+               (intr & AG71XX_INT_RX_OF) ? "RXOF " : "",
+               (intr & AG71XX_INT_RX_BE) ? "RXBE " : "");
+}
+

 static void ag71xx_ring_free(struct ag71xx_ring *ring)
 {
        kfree(ring->buf);
 
 static void ag71xx_ring_free(struct ag71xx_ring *ring)
 {
        kfree(ring->buf);
 

-       if (ring->descs)
-               dma_free_coherent(NULL, ring->size * sizeof(*ring->descs),
-                                 ring->descs, ring->descs_dma);
+       if (ring->descs_cpu)
+               dma_free_coherent(NULL, ring->size * ring->desc_size,
+                                 ring->descs_cpu, ring->descs_dma);

 }
 
 static int ag71xx_ring_alloc(struct ag71xx_ring *ring, unsigned int size)
 {
        int err;
 }
 
 static int ag71xx_ring_alloc(struct ag71xx_ring *ring, unsigned int size)
 {
        int err;

+       int i;

 
 

-       ring->descs = dma_alloc_coherent(NULL, size * sizeof(*ring->descs),
-                                        &ring->descs_dma,
-                                        GFP_ATOMIC);
-       if (!ring->descs) {
+       ring->desc_size = sizeof(struct ag71xx_desc);
+       if (ring->desc_size % cache_line_size()) {
+               DBG("ag71xx: ring %p, desc size %u rounded to %u\n",
+                       ring, ring->desc_size,
+                       roundup(ring->desc_size, cache_line_size()));
+               ring->desc_size = roundup(ring->desc_size, cache_line_size());
+       }
+
+       ring->descs_cpu = dma_alloc_coherent(NULL, size * ring->desc_size,
+                                            &ring->descs_dma, GFP_ATOMIC);
+       if (!ring->descs_cpu) {

                err = -ENOMEM;
                goto err;
        }
                err = -ENOMEM;
                goto err;
        }


@@ -83,6 +119,12 @@ static int ag71xx_ring_alloc(struct ag71xx_ring *ring, unsigned int size)
                goto err;
        }
 
                goto err;
        }
 

+       for (i = 0; i < size; i++) {
+               ring->buf[i].desc = (struct ag71xx_desc *)&ring->descs_cpu[i * ring->desc_size];
+               DBG("ag71xx: ring %p, desc %d at %p\n",
+                       ring, i, ring->buf[i].desc);
+       }
+

        return 0;
 
  err:
        return 0;
 
  err:


@@ -97,8 +139,8 @@ static void ag71xx_ring_tx_clean(struct ag71xx *ag)
        while (ring->curr != ring->dirty) {
                u32 i = ring->dirty % AG71XX_TX_RING_SIZE;
 
        while (ring->curr != ring->dirty) {
                u32 i = ring->dirty % AG71XX_TX_RING_SIZE;
 

-               if (!ag71xx_desc_empty(&ring->descs[i])) {
-                       ring->descs[i].ctrl = 0;
+               if (!ag71xx_desc_empty(ring->buf[i].desc)) {
+                       ring->buf[i].desc->ctrl = 0;

                        dev->stats.tx_errors++;
                }
 
                        dev->stats.tx_errors++;
                }
 


@@ -121,10 +163,10 @@ static void ag71xx_ring_tx_init(struct ag71xx *ag)
        int i;
 
        for (i = 0; i < AG71XX_TX_RING_SIZE; i++) {
        int i;
 
        for (i = 0; i < AG71XX_TX_RING_SIZE; i++) {

-               ring->descs[i].next = (u32) (ring->descs_dma +
-                       sizeof(*ring->descs) * ((i + 1) % AG71XX_TX_RING_SIZE));
+               ring->buf[i].desc->next = (u32) (ring->descs_dma +
+                       ring->desc_size * ((i + 1) % AG71XX_TX_RING_SIZE));

 
 

-               ring->descs[i].ctrl = DESC_EMPTY;
+               ring->buf[i].desc->ctrl = DESC_EMPTY;

                ring->buf[i].skb = NULL;
        }
 
                ring->buf[i].skb = NULL;
        }
 


@@ -156,9 +198,14 @@ static int ag71xx_ring_rx_init(struct ag71xx *ag)
        int ret;
 
        ret = 0;
        int ret;
 
        ret = 0;

-       for (i = 0; i < AG71XX_RX_RING_SIZE; i++)
-               ring->descs[i].next = (u32) (ring->descs_dma +
-                       sizeof(*ring->descs) * ((i + 1) % AG71XX_RX_RING_SIZE));
+       for (i = 0; i < AG71XX_RX_RING_SIZE; i++) {
+               ring->buf[i].desc->next = (u32) (ring->descs_dma +
+                       ring->desc_size * ((i + 1) % AG71XX_RX_RING_SIZE));
+
+               DBG("ag71xx: RX desc at %p, next is %08x\n",
+                       ring->buf[i].desc,
+                       ring->buf[i].desc->next);
+       }

 
        for (i = 0; i < AG71XX_RX_RING_SIZE; i++) {
                struct sk_buff *skb;
 
        for (i = 0; i < AG71XX_RX_RING_SIZE; i++) {
                struct sk_buff *skb;


@@ -169,12 +216,15 @@ static int ag71xx_ring_rx_init(struct ag71xx *ag)
                        break;
                }
 
                        break;
                }
 

+               dma_map_single(NULL, skb->data, AG71XX_RX_PKT_SIZE,
+                               DMA_FROM_DEVICE);
+

                skb->dev = ag->dev;
                skb_reserve(skb, AG71XX_RX_PKT_RESERVE);
 
                ring->buf[i].skb = skb;
                skb->dev = ag->dev;
                skb_reserve(skb, AG71XX_RX_PKT_RESERVE);
 
                ring->buf[i].skb = skb;

-               ring->descs[i].data = virt_to_phys(skb->data);
-               ring->descs[i].ctrl = DESC_EMPTY;
+               ring->buf[i].desc->data = virt_to_phys(skb->data);
+               ring->buf[i].desc->ctrl = DESC_EMPTY;

        }
 
        /* flush descriptors */
        }
 
        /* flush descriptors */


@@ -201,19 +251,20 @@ static int ag71xx_ring_rx_refill(struct ag71xx *ag)
                        struct sk_buff *skb;
 
                        skb = dev_alloc_skb(AG71XX_RX_PKT_SIZE);
                        struct sk_buff *skb;
 
                        skb = dev_alloc_skb(AG71XX_RX_PKT_SIZE);

-                       if (skb == NULL) {
-                               printk(KERN_ERR "%s: no memory for skb\n",
-                                       ag->dev->name);
+                       if (skb == NULL)

                                break;
                                break;

-                       }
+
+                       dma_map_single(NULL, skb->data, AG71XX_RX_PKT_SIZE,
+                                       DMA_FROM_DEVICE);

 
                        skb_reserve(skb, AG71XX_RX_PKT_RESERVE);
                        skb->dev = ag->dev;
 
                        skb_reserve(skb, AG71XX_RX_PKT_RESERVE);
                        skb->dev = ag->dev;

+

                        ring->buf[i].skb = skb;
                        ring->buf[i].skb = skb;

-                       ring->descs[i].data = virt_to_phys(skb->data);
+                       ring->buf[i].desc->data = virt_to_phys(skb->data);

                }
 
                }
 

-               ring->descs[i].ctrl = DESC_EMPTY;
+               ring->buf[i].desc->ctrl = DESC_EMPTY;

                count++;
        }
 
                count++;
        }
 


@@ -257,7 +308,7 @@ static void ag71xx_hw_set_macaddr(struct ag71xx *ag, unsigned char *mac)
        u32 t;
 
        t = (((u32) mac[0]) << 24) | (((u32) mac[1]) << 16)
        u32 t;
 
        t = (((u32) mac[0]) << 24) | (((u32) mac[1]) << 16)

-         | (((u32) mac[2]) << 8) | ((u32) mac[2]);
+         | (((u32) mac[2]) << 8) | ((u32) mac[3]);

 
        ag71xx_wr(ag, AG71XX_REG_MAC_ADDR1, t);
 
 
        ag71xx_wr(ag, AG71XX_REG_MAC_ADDR1, t);
 


@@ -265,8 +316,59 @@ static void ag71xx_hw_set_macaddr(struct ag71xx *ag, unsigned char *mac)
        ag71xx_wr(ag, AG71XX_REG_MAC_ADDR2, t);
 }
 
        ag71xx_wr(ag, AG71XX_REG_MAC_ADDR2, t);
 }
 

-#define MAC_CFG1_INIT  (MAC_CFG1_RXE | MAC_CFG1_TXE | MAC_CFG1_SRX \
-                       | MAC_CFG1_STX)
+static void ag71xx_dma_reset(struct ag71xx *ag)
+{
+       int i;
+
+       ag71xx_dump_dma_regs(ag);
+
+       /* stop RX and TX */
+       ag71xx_wr(ag, AG71XX_REG_RX_CTRL, 0);
+       ag71xx_wr(ag, AG71XX_REG_TX_CTRL, 0);
+
+       /* clear descriptor addresses */
+       ag71xx_wr(ag, AG71XX_REG_TX_DESC, 0);
+       ag71xx_wr(ag, AG71XX_REG_RX_DESC, 0);
+
+       /* clear pending RX/TX interrupts */
+       for (i = 0; i < 256; i++) {
+               ag71xx_wr(ag, AG71XX_REG_RX_STATUS, RX_STATUS_PR);
+               ag71xx_wr(ag, AG71XX_REG_TX_STATUS, TX_STATUS_PS);
+       }
+
+       /* clear pending errors */
+       ag71xx_wr(ag, AG71XX_REG_RX_STATUS, RX_STATUS_BE | RX_STATUS_OF);
+       ag71xx_wr(ag, AG71XX_REG_TX_STATUS, TX_STATUS_BE | TX_STATUS_UR);
+
+       if (ag71xx_rr(ag, AG71XX_REG_RX_STATUS))
+               printk(KERN_ALERT "%s: unable to clear DMA Rx status\n",
+                       ag->dev->name);
+
+       if (ag71xx_rr(ag, AG71XX_REG_TX_STATUS))
+               printk(KERN_ALERT "%s: unable to clear DMA Tx status\n",
+                       ag->dev->name);
+
+       ag71xx_dump_dma_regs(ag);
+}
+
+#define MAC_CFG1_INIT  (MAC_CFG1_RXE | MAC_CFG1_TXE | \
+                        MAC_CFG1_SRX | MAC_CFG1_STX)
+
+#define FIFO_CFG0_INIT (FIFO_CFG0_ALL << FIFO_CFG0_ENABLE_SHIFT)
+
+#define FIFO_CFG4_INIT (FIFO_CFG4_DE | FIFO_CFG4_DV | FIFO_CFG4_FC | \
+                        FIFO_CFG4_CE | FIFO_CFG4_CR | FIFO_CFG4_LM | \
+                        FIFO_CFG4_LO | FIFO_CFG4_OK | FIFO_CFG4_MC | \
+                        FIFO_CFG4_BC | FIFO_CFG4_DR | FIFO_CFG4_LE | \
+                        FIFO_CFG4_CF | FIFO_CFG4_PF | FIFO_CFG4_UO | \
+                        FIFO_CFG4_VT)
+
+#define FIFO_CFG5_INIT (FIFO_CFG5_DE | FIFO_CFG5_DV | FIFO_CFG5_FC | \
+                        FIFO_CFG5_CE | FIFO_CFG5_LO | FIFO_CFG5_OK | \
+                        FIFO_CFG5_MC | FIFO_CFG5_BC | FIFO_CFG5_DR | \
+                        FIFO_CFG5_CF | FIFO_CFG5_PF | FIFO_CFG5_VT | \
+                        FIFO_CFG5_LE | FIFO_CFG5_FT | FIFO_CFG5_16 | \
+                        FIFO_CFG5_17 | FIFO_CFG5_SF)

 
 static void ag71xx_hw_init(struct ag71xx *ag)
 {
 
 static void ag71xx_hw_init(struct ag71xx *ag)
 {


@@ -280,21 +382,25 @@ static void ag71xx_hw_init(struct ag71xx *ag)
        ar71xx_device_start(pdata->reset_bit);
        mdelay(100);
 
        ar71xx_device_start(pdata->reset_bit);
        mdelay(100);
 

+       /* setup MAC configuration registers */

        ag71xx_wr(ag, AG71XX_REG_MAC_CFG1, MAC_CFG1_INIT);
        ag71xx_wr(ag, AG71XX_REG_MAC_CFG1, MAC_CFG1_INIT);

-
-       /* TODO: set max packet size */
-

        ag71xx_sb(ag, AG71XX_REG_MAC_CFG2,
                  MAC_CFG2_PAD_CRC_EN | MAC_CFG2_LEN_CHECK);
 
        ag71xx_sb(ag, AG71XX_REG_MAC_CFG2,
                  MAC_CFG2_PAD_CRC_EN | MAC_CFG2_LEN_CHECK);
 

-       ag71xx_wr(ag, AG71XX_REG_FIFO_CFG0, 0x00001f00);
+       /* setup max frame length */
+       ag71xx_wr(ag, AG71XX_REG_MAC_MFL, AG71XX_TX_MTU_LEN);

 
 

+       /* setup MII interface type */

        ag71xx_mii_ctrl_set_if(ag, pdata->mii_if);
 
        ag71xx_mii_ctrl_set_if(ag, pdata->mii_if);
 

+       /* setup FIFO configuration registers */
+       ag71xx_wr(ag, AG71XX_REG_FIFO_CFG0, FIFO_CFG0_INIT);

        ag71xx_wr(ag, AG71XX_REG_FIFO_CFG1, 0x0fff0000);
        ag71xx_wr(ag, AG71XX_REG_FIFO_CFG2, 0x00001fff);
        ag71xx_wr(ag, AG71XX_REG_FIFO_CFG1, 0x0fff0000);
        ag71xx_wr(ag, AG71XX_REG_FIFO_CFG2, 0x00001fff);

-       ag71xx_wr(ag, AG71XX_REG_FIFO_CFG4, 0x0000ffff);
-       ag71xx_wr(ag, AG71XX_REG_FIFO_CFG5, 0x0007ffef);
+       ag71xx_wr(ag, AG71XX_REG_FIFO_CFG4, FIFO_CFG4_INIT);
+       ag71xx_wr(ag, AG71XX_REG_FIFO_CFG5, FIFO_CFG5_INIT);
+
+       ag71xx_dma_reset(ag);

 }
 
 static void ag71xx_hw_start(struct ag71xx *ag)
 }
 
 static void ag71xx_hw_start(struct ag71xx *ag)


@@ -308,12 +414,10 @@ static void ag71xx_hw_start(struct ag71xx *ag)
 
 static void ag71xx_hw_stop(struct ag71xx *ag)
 {
 
 static void ag71xx_hw_stop(struct ag71xx *ag)
 {

-       /* stop RX and TX */
-       ag71xx_wr(ag, AG71XX_REG_RX_CTRL, 0);
-       ag71xx_wr(ag, AG71XX_REG_TX_CTRL, 0);
-

        /* disable all interrupts */
        ag71xx_wr(ag, AG71XX_REG_INT_ENABLE, 0);
        /* disable all interrupts */
        ag71xx_wr(ag, AG71XX_REG_INT_ENABLE, 0);

+
+       ag71xx_dma_reset(ag);

 }
 
 static int ag71xx_open(struct net_device *dev)
 }
 
 static int ag71xx_open(struct net_device *dev)


@@ -361,6 +465,7 @@ static int ag71xx_stop(struct net_device *dev)
        ag71xx_phy_stop(ag);
 
        napi_disable(&ag->napi);
        ag71xx_phy_stop(ag);
 
        napi_disable(&ag->napi);

+       del_timer_sync(&ag->oom_timer);

 
        spin_unlock_irqrestore(&ag->lock, flags);
 
 
        spin_unlock_irqrestore(&ag->lock, flags);
 


@@ -372,28 +477,24 @@ static int ag71xx_stop(struct net_device *dev)
 static int ag71xx_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 {
        struct ag71xx *ag = netdev_priv(dev);
 static int ag71xx_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 {
        struct ag71xx *ag = netdev_priv(dev);

-       struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);

        struct ag71xx_ring *ring = &ag->tx_ring;
        struct ag71xx_desc *desc;
        struct ag71xx_ring *ring = &ag->tx_ring;
        struct ag71xx_desc *desc;

-       unsigned long flags;

        int i;
 
        i = ring->curr % AG71XX_TX_RING_SIZE;
        int i;
 
        i = ring->curr % AG71XX_TX_RING_SIZE;

-       desc = &ring->descs[i];
-
-       spin_lock_irqsave(&ag->lock, flags);
-       ar71xx_ddr_flush(pdata->flush_reg);
-       spin_unlock_irqrestore(&ag->lock, flags);
+       desc = ring->buf[i].desc;

 
        if (!ag71xx_desc_empty(desc))
                goto err_drop;
 
 
        if (!ag71xx_desc_empty(desc))
                goto err_drop;
 

+       ag71xx_add_ar8216_header(ag, skb);
+

        if (skb->len <= 0) {
                DBG("%s: packet len is too small\n", ag->dev->name);
                goto err_drop;
        }
 
        if (skb->len <= 0) {
                DBG("%s: packet len is too small\n", ag->dev->name);
                goto err_drop;
        }
 

-       dma_cache_wback_inv((unsigned long)skb->data, skb->len);
+       dma_map_single(NULL, skb->data, skb->len, DMA_TO_DEVICE);

 
        ring->buf[i].skb = skb;
 
 
        ring->buf[i].skb = skb;
 


@@ -469,22 +570,43 @@ static int ag71xx_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
        return -EOPNOTSUPP;
 }
 
        return -EOPNOTSUPP;
 }
 

+static void ag71xx_oom_timer_handler(unsigned long data)
+{
+       struct net_device *dev = (struct net_device *) data;
+       struct ag71xx *ag = netdev_priv(dev);
+
+       netif_rx_schedule(dev, &ag->napi);
+}
+
+static void ag71xx_tx_timeout(struct net_device *dev)
+{
+       struct ag71xx *ag = netdev_priv(dev);
+
+       if (netif_msg_tx_err(ag))
+               printk(KERN_DEBUG "%s: tx timeout\n", ag->dev->name);
+
+       schedule_work(&ag->restart_work);
+}
+
+static void ag71xx_restart_work_func(struct work_struct *work)
+{
+       struct ag71xx *ag = container_of(work, struct ag71xx, restart_work);
+
+       ag71xx_stop(ag->dev);
+       ag71xx_open(ag->dev);
+}
+

 static void ag71xx_tx_packets(struct ag71xx *ag)
 {
 static void ag71xx_tx_packets(struct ag71xx *ag)
 {

-       struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);

        struct ag71xx_ring *ring = &ag->tx_ring;
        unsigned int sent;
 
        DBG("%s: processing TX ring\n", ag->dev->name);
 
        struct ag71xx_ring *ring = &ag->tx_ring;
        unsigned int sent;
 
        DBG("%s: processing TX ring\n", ag->dev->name);
 

-#ifdef AG71XX_NAPI_TX
-       ar71xx_ddr_flush(pdata->flush_reg);
-#endif
-

        sent = 0;
        while (ring->dirty != ring->curr) {
                unsigned int i = ring->dirty % AG71XX_TX_RING_SIZE;
        sent = 0;
        while (ring->dirty != ring->curr) {
                unsigned int i = ring->dirty % AG71XX_TX_RING_SIZE;

-               struct ag71xx_desc *desc = &ring->descs[i];
+               struct ag71xx_desc *desc = ring->buf[i].desc;

                struct sk_buff *skb = ring->buf[i].skb;
 
                if (!ag71xx_desc_empty(desc))
                struct sk_buff *skb = ring->buf[i].skb;
 
                if (!ag71xx_desc_empty(desc))


@@ -513,24 +635,14 @@ static int ag71xx_rx_packets(struct ag71xx *ag, int limit)
 {
        struct net_device *dev = ag->dev;
        struct ag71xx_ring *ring = &ag->rx_ring;
 {
        struct net_device *dev = ag->dev;
        struct ag71xx_ring *ring = &ag->rx_ring;

-#ifndef AG71XX_NAPI_TX
-       struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
-       unsigned long flags;
-#endif

        int done = 0;
 
        int done = 0;
 

-#ifndef AG71XX_NAPI_TX
-       spin_lock_irqsave(&ag->lock, flags);
-       ar71xx_ddr_flush(pdata->flush_reg);
-       spin_unlock_irqrestore(&ag->lock, flags);
-#endif
-

        DBG("%s: rx packets, limit=%d, curr=%u, dirty=%u\n",
                        dev->name, limit, ring->curr, ring->dirty);
 
        while (done < limit) {
                unsigned int i = ring->curr % AG71XX_RX_RING_SIZE;
        DBG("%s: rx packets, limit=%d, curr=%u, dirty=%u\n",
                        dev->name, limit, ring->curr, ring->dirty);
 
        while (done < limit) {
                unsigned int i = ring->curr % AG71XX_RX_RING_SIZE;

-               struct ag71xx_desc *desc = &ring->descs[i];
+               struct ag71xx_desc *desc = ring->buf[i].desc;

                struct sk_buff *skb;
                int pktlen;
 
                struct sk_buff *skb;
                int pktlen;
 


@@ -542,32 +654,33 @@ static int ag71xx_rx_packets(struct ag71xx *ag, int limit)
                        break;
                }
 
                        break;
                }
 

+               ag71xx_wr(ag, AG71XX_REG_RX_STATUS, RX_STATUS_PR);
+

                skb = ring->buf[i].skb;
                pktlen = ag71xx_desc_pktlen(desc);
                pktlen -= ETH_FCS_LEN;
 
                skb = ring->buf[i].skb;
                pktlen = ag71xx_desc_pktlen(desc);
                pktlen -= ETH_FCS_LEN;
 

-               /* TODO: move it into the refill function */
-               dma_cache_wback_inv((unsigned long)skb->data, pktlen);

                skb_put(skb, pktlen);
 
                skb->dev = dev;
                skb_put(skb, pktlen);
 
                skb->dev = dev;

-               skb->protocol = eth_type_trans(skb, dev);
-               skb->ip_summed = CHECKSUM_UNNECESSARY;
-
-               netif_receive_skb(skb);
+               skb->ip_summed = CHECKSUM_NONE;

 
                dev->last_rx = jiffies;
                dev->stats.rx_packets++;
                dev->stats.rx_bytes += pktlen;
 
 
                dev->last_rx = jiffies;
                dev->stats.rx_packets++;
                dev->stats.rx_bytes += pktlen;
 

+               if (ag71xx_remove_ar8216_header(ag, skb) != 0) {
+                       dev->stats.rx_dropped++;
+                       kfree_skb(skb);
+               } else {
+                       skb->protocol = eth_type_trans(skb, dev);
+                       netif_receive_skb(skb);
+               }
+

                ring->buf[i].skb = NULL;
                done++;
 
                ring->buf[i].skb = NULL;
                done++;
 

-               ag71xx_wr(ag, AG71XX_REG_RX_STATUS, RX_STATUS_PR);
-

                ring->curr++;
                ring->curr++;

-               if ((ring->curr - ring->dirty) > (AG71XX_RX_RING_SIZE / 4))
-                       ag71xx_ring_rx_refill(ag);

        }
 
        ag71xx_ring_rx_refill(ag);
        }
 
        ag71xx_ring_rx_refill(ag);


@@ -581,30 +694,42 @@ static int ag71xx_rx_packets(struct ag71xx *ag, int limit)
 static int ag71xx_poll(struct napi_struct *napi, int limit)
 {
        struct ag71xx *ag = container_of(napi, struct ag71xx, napi);
 static int ag71xx_poll(struct napi_struct *napi, int limit)
 {
        struct ag71xx *ag = container_of(napi, struct ag71xx, napi);

-#ifdef AG71XX_NAPI_TX

        struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
        struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);

-#endif

        struct net_device *dev = ag->dev;
        struct net_device *dev = ag->dev;

+       struct ag71xx_ring *rx_ring;

        unsigned long flags;
        u32 status;
        int done;
 
        unsigned long flags;
        u32 status;
        int done;
 

-#ifdef AG71XX_NAPI_TX
-       ar71xx_ddr_flush(pdata->flush_reg);
+       pdata->ddr_flush();

        ag71xx_tx_packets(ag);
        ag71xx_tx_packets(ag);

-#endif

 
        DBG("%s: processing RX ring\n", dev->name);
        done = ag71xx_rx_packets(ag, limit);
 
 
        DBG("%s: processing RX ring\n", dev->name);
        done = ag71xx_rx_packets(ag, limit);
 

-       /* TODO: add OOM handler */
+       rx_ring = &ag->rx_ring;
+       if (rx_ring->buf[rx_ring->dirty % AG71XX_RX_RING_SIZE].skb == NULL)
+               goto oom;

 
 

-       status = ag71xx_rr(ag, AG71XX_REG_INT_STATUS);
-       status &= AG71XX_INT_POLL;
+       status = ag71xx_rr(ag, AG71XX_REG_RX_STATUS);
+       if (unlikely(status & RX_STATUS_OF)) {
+               ag71xx_wr(ag, AG71XX_REG_RX_STATUS, RX_STATUS_OF);
+               dev->stats.rx_fifo_errors++;
+
+               /* restart RX */
+               ag71xx_wr(ag, AG71XX_REG_RX_CTRL, RX_CTRL_RXE);
+       }
+
+       if (done < limit) {
+               if (status & RX_STATUS_PR)
+                       goto more;
+
+               status = ag71xx_rr(ag, AG71XX_REG_TX_STATUS);
+               if (status & TX_STATUS_PS)
+                       goto more;

 
 

-       if ((done < limit) && (!status)) {
-               DBG("%s: disable polling mode, done=%d, status=%x\n",
-                       dev->name, done, status);
+               DBG("%s: disable polling mode, done=%d, limit=%d\n",
+                       dev->name, done, limit);

 
                netif_rx_complete(dev, napi);
 
 
                netif_rx_complete(dev, napi);
 


@@ -612,23 +737,21 @@ static int ag71xx_poll(struct napi_struct *napi, int limit)
                spin_lock_irqsave(&ag->lock, flags);
                ag71xx_int_enable(ag, AG71XX_INT_POLL);
                spin_unlock_irqrestore(&ag->lock, flags);
                spin_lock_irqsave(&ag->lock, flags);
                ag71xx_int_enable(ag, AG71XX_INT_POLL);
                spin_unlock_irqrestore(&ag->lock, flags);

-               return 0;
+               return done;

        }
 
        }
 

-       if (status & AG71XX_INT_RX_OF) {
-               if (netif_msg_rx_err(ag))
-                       printk(KERN_ALERT "%s: rx owerflow, restarting dma\n",
-                               dev->name);
+ more:
+       DBG("%s: stay in polling mode, done=%d, limit=%d\n",
+                       dev->name, done, limit);
+       return done;

 
 

-               /* ack interrupt */
-               ag71xx_wr(ag, AG71XX_REG_RX_STATUS, RX_STATUS_OF);
-               /* restart RX */
-               ag71xx_wr(ag, AG71XX_REG_RX_CTRL, RX_CTRL_RXE);
-       }
+ oom:
+       if (netif_msg_rx_err(ag))
+               printk(KERN_DEBUG "%s: out of memory\n", dev->name);

 
 

-       DBG("%s: stay in polling mode, done=%d, status=%x\n",
-                       dev->name, done, status);
-       return 1;
+       mod_timer(&ag->oom_timer, jiffies + AG71XX_OOM_REFILL);
+       netif_rx_complete(dev, napi);
+       return 0;

 }
 
 static irqreturn_t ag71xx_interrupt(int irq, void *dev_id)
 }
 
 static irqreturn_t ag71xx_interrupt(int irq, void *dev_id)


@@ -638,7 +761,7 @@ static irqreturn_t ag71xx_interrupt(int irq, void *dev_id)
        u32 status;
 
        status = ag71xx_rr(ag, AG71XX_REG_INT_STATUS);
        u32 status;
 
        status = ag71xx_rr(ag, AG71XX_REG_INT_STATUS);

-       status &= ag71xx_rr(ag, AG71XX_REG_INT_ENABLE);
+       ag71xx_dump_intr(ag, "raw", status);

 
        if (unlikely(!status))
                return IRQ_NONE;
 
        if (unlikely(!status))
                return IRQ_NONE;


@@ -654,18 +777,6 @@ static irqreturn_t ag71xx_interrupt(int irq, void *dev_id)
                }
        }
 
                }
        }
 

-#if 0
-       if (unlikely(status & AG71XX_INT_TX_UR)) {
-               ag71xx_wr(ag, AG71XX_REG_TX_STATUS, TX_STATUS_UR);
-               DBG("%s: TX underrun\n", dev->name);
-       }
-#endif
-
-#ifndef AG71XX_NAPI_TX
-       if (likely(status & AG71XX_INT_TX_PS))
-               ag71xx_tx_packets(ag);
-#endif
-

        if (likely(status & AG71XX_INT_POLL)) {
                ag71xx_int_disable(ag, AG71XX_INT_POLL);
                DBG("%s: enable polling mode\n", dev->name);
        if (likely(status & AG71XX_INT_POLL)) {
                ag71xx_int_disable(ag, AG71XX_INT_POLL);
                DBG("%s: enable polling mode\n", dev->name);


@@ -707,8 +818,8 @@ static int __init ag71xx_probe(struct platform_device *pdev)
        ag = netdev_priv(dev);
        ag->pdev = pdev;
        ag->dev = dev;
        ag = netdev_priv(dev);
        ag->pdev = pdev;
        ag->dev = dev;

-       ag->mii_bus = &ag71xx_mdio_bus->mii_bus;
-       ag->msg_enable = netif_msg_init(ag71xx_debug,
+       ag->mii_bus = ag71xx_mdio_bus->mii_bus;
+       ag->msg_enable = netif_msg_init(ag71xx_msg_level,

                                        AG71XX_DEFAULT_MSG_ENABLE);
        spin_lock_init(&ag->lock);
 
                                        AG71XX_DEFAULT_MSG_ENABLE);
        spin_lock_init(&ag->lock);
 


@@ -771,16 +882,16 @@ static int __init ag71xx_probe(struct platform_device *pdev)
        dev->do_ioctl = ag71xx_do_ioctl;
        dev->ethtool_ops = &ag71xx_ethtool_ops;
 
        dev->do_ioctl = ag71xx_do_ioctl;
        dev->ethtool_ops = &ag71xx_ethtool_ops;
 

-       netif_napi_add(dev, &ag->napi, ag71xx_poll, AG71XX_NAPI_WEIGHT);
+       dev->tx_timeout = ag71xx_tx_timeout;
+       INIT_WORK(&ag->restart_work, ag71xx_restart_work_func);

 
 

-       if (is_valid_ether_addr(pdata->mac_addr))
-               memcpy(dev->dev_addr, pdata->mac_addr, ETH_ALEN);
-       else {
-               dev->dev_addr[0] = 0xde;
-               dev->dev_addr[1] = 0xad;
-               get_random_bytes(&dev->dev_addr[2], 3);
-               dev->dev_addr[5] = pdev->id & 0xff;
-       }
+       init_timer(&ag->oom_timer);
+       ag->oom_timer.data = (unsigned long) dev;
+       ag->oom_timer.function = ag71xx_oom_timer_handler;
+
+       memcpy(dev->dev_addr, pdata->mac_addr, ETH_ALEN);
+
+       netif_napi_add(dev, &ag->napi, ag71xx_poll, AG71XX_NAPI_WEIGHT);

 
        err = register_netdev(dev);
        if (err) {
 
        err = register_netdev(dev);
        if (err) {


@@ -880,6 +991,7 @@ static int __init ag71xx_module_init(void)
 static void __exit ag71xx_module_exit(void)
 {
        platform_driver_unregister(&ag71xx_driver);
 static void __exit ag71xx_module_exit(void)
 {
        platform_driver_unregister(&ag71xx_driver);

+       ag71xx_mdio_driver_exit();

 }
 
 module_init(ag71xx_module_init);
 }
 
 module_init(ag71xx_module_init);