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[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 5e31438..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 +24,10 @@
        | 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)
 {
 
 static void ag71xx_dump_dma_regs(struct ag71xx *ag)
 {
@@ -85,19 +86,27 @@ static void ag71xx_ring_free(struct ag71xx_ring *ring)
 {
        kfree(ring->buf);
 
 {
        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->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 = dma_alloc_coherent(NULL, size * sizeof(*ring->descs),
-                                        &ring->descs_dma,
-                                        GFP_ATOMIC);
-       if (!ring->descs) {
+       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;
        }
@@ -110,6 +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:
@@ -124,8 +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++;
                }
 
@@ -148,10 +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;
        }
 
@@ -183,9 +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;
@@ -203,8 +223,8 @@ static int ag71xx_ring_rx_init(struct ag71xx *ag)
                skb_reserve(skb, AG71XX_RX_PKT_RESERVE);
 
                ring->buf[i].skb = skb;
                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 */
@@ -231,11 +251,8 @@ 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);
 
                        dma_map_single(NULL, skb->data, AG71XX_RX_PKT_SIZE,
                                        DMA_FROM_DEVICE);
@@ -244,10 +261,10 @@ static int ag71xx_ring_rx_refill(struct ag71xx *ag)
                        skb->dev = ag->dev;
 
                        ring->buf[i].skb = skb;
                        skb->dev = ag->dev;
 
                        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++;
        }
 
@@ -299,17 +316,6 @@ 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 AR71XX_MAC_CFG1_INIT   (MAC_CFG1_RXE | MAC_CFG1_TXE | \
-                                MAC_CFG1_SRX | MAC_CFG1_STX)
-#define AR71XX_FIFO_CFG5_INIT  0x0007ffef
-
-#define AR91XX_MAC_CFG1_INIT   (MAC_CFG1_RXE | MAC_CFG1_TXE | \
-                                MAC_CFG1_SRX | MAC_CFG1_STX | \
-                                MAC_CFG1_TFC | MAC_CFG1_RFC)
-#define AR91XX_FIFO_CFG5_INIT  0x0007efef
-
-#define FIFO_CFG0_INIT (FIFO_CFG0_ALL << FIFO_CFG0_ENABLE_SHIFT)
-
 static void ag71xx_dma_reset(struct ag71xx *ag)
 {
        int i;
 static void ag71xx_dma_reset(struct ag71xx *ag)
 {
        int i;
@@ -345,6 +351,25 @@ static void ag71xx_dma_reset(struct ag71xx *ag)
        ag71xx_dump_dma_regs(ag);
 }
 
        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)
 {
        struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
 static void ag71xx_hw_init(struct ag71xx *ag)
 {
        struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
@@ -358,8 +383,7 @@ static void ag71xx_hw_init(struct ag71xx *ag)
        mdelay(100);
 
        /* setup MAC configuration registers */
        mdelay(100);
 
        /* setup MAC configuration registers */
-       ag71xx_wr(ag, AG71XX_REG_MAC_CFG1,
-               pdata->is_ar91xx ? AR91XX_MAC_CFG1_INIT : AR71XX_MAC_CFG1_INIT);
+       ag71xx_wr(ag, AG71XX_REG_MAC_CFG1, MAC_CFG1_INIT);
        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);
 
@@ -373,10 +397,8 @@ static void ag71xx_hw_init(struct ag71xx *ag)
        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_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_CFG4, 0x0000ffff);
-       ag71xx_wr(ag, AG71XX_REG_FIFO_CFG5,
-                       pdata->is_ar91xx ? AR91XX_FIFO_CFG5_INIT
-                                        : AR71XX_FIFO_CFG5_INIT);
+       ag71xx_wr(ag, AG71XX_REG_FIFO_CFG4, FIFO_CFG4_INIT);
+       ag71xx_wr(ag, AG71XX_REG_FIFO_CFG5, FIFO_CFG5_INIT);
 
        ag71xx_dma_reset(ag);
 }
 
        ag71xx_dma_reset(ag);
 }
@@ -443,6 +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);
 
@@ -454,22 +477,18 @@ 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);
-       pdata->ddr_flush();
-       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;
@@ -551,22 +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
-       pdata->ddr_flush();
-#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))
@@ -595,24 +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);
-       pdata->ddr_flush();
-       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;
 
@@ -633,21 +663,24 @@ static int ag71xx_rx_packets(struct ag71xx *ag, int limit)
                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_NONE;
 
                skb->ip_summed = CHECKSUM_NONE;
 
-               netif_receive_skb(skb);
-
                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->curr++;
                ring->buf[i].skb = NULL;
                done++;
 
                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);
@@ -661,23 +694,22 @@ 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
        pdata->ddr_flush();
        ag71xx_tx_packets(ag);
        pdata->ddr_flush();
        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_RX_STATUS);
        if (unlikely(status & RX_STATUS_OF)) {
 
        status = ag71xx_rr(ag, AG71XX_REG_RX_STATUS);
        if (unlikely(status & RX_STATUS_OF)) {
@@ -688,9 +720,16 @@ static int ag71xx_poll(struct napi_struct *napi, int limit)
                ag71xx_wr(ag, AG71XX_REG_RX_CTRL, RX_CTRL_RXE);
        }
 
                ag71xx_wr(ag, AG71XX_REG_RX_CTRL, RX_CTRL_RXE);
        }
 
-       if ((done < limit) && ((status & RX_STATUS_PR) == 0)) {
-               DBG("%s: disable polling mode, done=%d, status=%x\n",
-                       dev->name, done, status);
+       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;
+
+               DBG("%s: disable polling mode, done=%d, limit=%d\n",
+                       dev->name, done, limit);
 
                netif_rx_complete(dev, napi);
 
 
                netif_rx_complete(dev, napi);
 
@@ -698,12 +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;
        }
 
        }
 
-       DBG("%s: stay in polling mode, done=%d, status=%x\n",
-                       dev->name, done, status);
-       return 1;
+ more:
+       DBG("%s: stay in polling mode, done=%d, limit=%d\n",
+                       dev->name, done, limit);
+       return done;
+
+ oom:
+       if (netif_msg_rx_err(ag))
+               printk(KERN_DEBUG "%s: out of memory\n", dev->name);
+
+       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)
@@ -714,8 +762,6 @@ static irqreturn_t ag71xx_interrupt(int irq, void *dev_id)
 
        status = ag71xx_rr(ag, AG71XX_REG_INT_STATUS);
        ag71xx_dump_intr(ag, "raw", status);
 
        status = ag71xx_rr(ag, AG71XX_REG_INT_STATUS);
        ag71xx_dump_intr(ag, "raw", status);
-       status &= ag71xx_rr(ag, AG71XX_REG_INT_ENABLE);
-       ag71xx_dump_intr(ag, "masked", status);
 
        if (unlikely(!status))
                return IRQ_NONE;
 
        if (unlikely(!status))
                return IRQ_NONE;
@@ -731,18 +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);
@@ -784,8 +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);
 
@@ -848,16 +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) {
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