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[PATCH] mv643xx_eth: Clean up interrupt handling

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Signed-off-by: Dale Farnsworth <dale@farnsworth.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Dale Farnsworth 2006-03-03 10:04:39 -07:00 committed by Jeff Garzik
parent 7303fde88a
commit 468d09f894
2 changed files with 25 additions and 55 deletions
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75
drivers/net/mv643xx_eth.c
View File

@ -388,11 +388,7 @@ static void mv643xx_eth_free_all_tx_descs(struct net_device *dev)
*
* Output : number of served packets
*/
#ifdef MV643XX_NAPI
static int mv643xx_eth_receive_queue(struct net_device *dev, int budget)
#else
static int mv643xx_eth_receive_queue(struct net_device *dev)
#endif
{
struct mv643xx_private *mp = netdev_priv(dev);
struct net_device_stats *stats = &mp->stats;
@ -400,15 +396,14 @@ static int mv643xx_eth_receive_queue(struct net_device *dev)
struct sk_buff *skb;
struct pkt_info pkt_info;
#ifdef MV643XX_NAPI
while (budget-- > 0 && eth_port_receive(mp, &pkt_info) == ETH_OK) {
#else
while (eth_port_receive(mp, &pkt_info) == ETH_OK) {
#endif
mp->rx_desc_count--;
received_packets++;
/* Update statistics. Note byte count includes 4 byte CRC count */
/*
* Update statistics.
* Note byte count includes 4 byte CRC count
*/
stats->rx_packets++;
stats->rx_bytes += pkt_info.byte_cnt;
skb = pkt_info.return_info;
@ -532,48 +527,10 @@ static irqreturn_t mv643xx_eth_int_handler(int irq, void *dev_id,
/* Read interrupt cause registers */
eth_int_cause = mv_read(MV643XX_ETH_INTERRUPT_CAUSE_REG(port_num)) &
ETH_INT_UNMASK_ALL;
if (eth_int_cause & BIT1)
if (eth_int_cause & ETH_INT_CAUSE_EXT) {
eth_int_cause_ext = mv_read(
MV643XX_ETH_INTERRUPT_CAUSE_EXTEND_REG(port_num)) &
ETH_INT_UNMASK_ALL_EXT;
#ifdef MV643XX_NAPI
if (!(eth_int_cause & 0x0007fffd)) {
/* Dont ack the Rx interrupt */
#endif
/*
* Clear specific ethernet port intrerrupt registers by
* acknowleding relevant bits.
*/
mv_write(MV643XX_ETH_INTERRUPT_CAUSE_REG(port_num),
~eth_int_cause);
if (eth_int_cause_ext != 0x0) {
mv_write(MV643XX_ETH_INTERRUPT_CAUSE_EXTEND_REG
(port_num), ~eth_int_cause_ext);
/* UDP change : We may need this */
if (eth_int_cause_ext & (BIT0 | BIT8))
mv643xx_eth_free_completed_tx_descs(dev);
}
#ifdef MV643XX_NAPI
} else {
if (netif_rx_schedule_prep(dev)) {
/* Mask all the interrupts */
mv_write(MV643XX_ETH_INTERRUPT_MASK_REG(port_num),
ETH_INT_MASK_ALL);
/* wait for previous write to complete */
mv_read(MV643XX_ETH_INTERRUPT_MASK_REG(port_num));
__netif_rx_schedule(dev);
}
#else
if (eth_int_cause & (BIT2 | BIT11))
mv643xx_eth_receive_queue(dev, 0);
/*
* After forwarded received packets to upper layer, add a task
* in an interrupts enabled context that refills the RX ring
* with skb's.
*/
#ifdef MV643XX_RX_QUEUE_FILL_ON_TASK
/* Mask all interrupts on ethernet port */
mv_write(MV643XX_ETH_INTERRUPT_MASK_REG(port_num),
@ -586,11 +543,12 @@ static irqreturn_t mv643xx_eth_int_handler(int irq, void *dev_id,
#else
mp->rx_task.func(dev);
#endif
#endif
mv_write(MV643XX_ETH_INTERRUPT_CAUSE_EXTEND_REG(port_num),
~eth_int_cause_ext);
}
/* PHY status changed */
if (eth_int_cause_ext & (BIT16 | BIT20)) {
if (eth_int_cause_ext & ETH_INT_CAUSE_PHY) {
struct ethtool_cmd cmd;
if (mii_link_ok(&mp->mii)) {
@ -610,6 +568,23 @@ static irqreturn_t mv643xx_eth_int_handler(int irq, void *dev_id,
}
}
#ifdef MV643XX_NAPI
if (eth_int_cause & ETH_INT_CAUSE_RX) {
/* schedule the NAPI poll routine to maintain port */
mv_write(MV643XX_ETH_INTERRUPT_MASK_REG(port_num),
ETH_INT_MASK_ALL);
/* wait for previous write to complete */
mv_read(MV643XX_ETH_INTERRUPT_MASK_REG(port_num));
netif_rx_schedule(dev);
}
#else
if (eth_int_cause & ETH_INT_CAUSE_RX)
mv643xx_eth_receive_queue(dev, INT_MAX);
if (eth_int_cause_ext & ETH_INT_CAUSE_TX)
mv643xx_eth_free_completed_tx_descs(dev);
#endif
/*
* If no real interrupt occured, exit.
* This can happen when using gigE interrupt coalescing mechanism.

5
drivers/net/mv643xx_eth.h
View File

@ -372,9 +372,6 @@ struct mv643xx_private {
struct work_struct tx_timeout_task;
/*
* Former struct mv643xx_eth_priv members start here
*/
struct net_device_stats stats;
struct mv643xx_mib_counters mib_counters;
spinlock_t lock;
@ -405,8 +402,6 @@ struct mv643xx_private {
struct mii_if_info mii;
};
/* ethernet.h API list */
/* Port operation control routines */
static void eth_port_init(struct mv643xx_private *mp);
static void eth_port_reset(unsigned int eth_port_num);