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authorDale Farnsworth <dale@farnsworth.org>2006-03-03 10:05:26 -0700
committerJeff Garzik <jeff@garzik.org>2006-03-03 12:12:37 -0500
commitf78fb4743dc06719084239c29dc178ad38ad2e2f (patch)
tree62ebf8cc6a8de144c21a0b5cd2a3318a0e2445c2
parent468d09f8946d40228c56de26fe4874b2f98067ed (diff)
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[PATCH] mv643xx_eth: Remove non-working feature: task level rx queue refill
The task level rx queue refill feature hasn't ever worked (at least in 2.6) and is of dubious value. Remove it. Signed-off-by: Dale Farnsworth <dale@farnsworth.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
-rw-r--r--drivers/net/mv643xx_eth.c59
-rw-r--r--drivers/net/mv643xx_eth.h8
2 files changed, 12 insertions, 55 deletions
diff --git a/drivers/net/mv643xx_eth.c b/drivers/net/mv643xx_eth.c
index 30b0d5b1b15..9f2661355a4 100644
--- a/drivers/net/mv643xx_eth.c
+++ b/drivers/net/mv643xx_eth.c
@@ -132,25 +132,21 @@ static int mv643xx_eth_change_mtu(struct net_device *dev, int new_mtu)
}
/*
- * mv643xx_eth_rx_task
+ * mv643xx_eth_rx_refill_descs
*
* Fills / refills RX queue on a certain gigabit ethernet port
*
* Input : pointer to ethernet interface network device structure
* Output : N/A
*/
-static void mv643xx_eth_rx_task(void *data)
+static void mv643xx_eth_rx_refill_descs(struct net_device *dev)
{
- struct net_device *dev = (struct net_device *)data;
struct mv643xx_private *mp = netdev_priv(dev);
struct pkt_info pkt_info;
struct sk_buff *skb;
int unaligned;
- if (test_and_set_bit(0, &mp->rx_task_busy))
- panic("%s: Error in test_set_bit / clear_bit", dev->name);
-
- while (mp->rx_desc_count < (mp->rx_ring_size - 5)) {
+ while (mp->rx_desc_count < mp->rx_ring_size) {
skb = dev_alloc_skb(ETH_RX_SKB_SIZE + ETH_DMA_ALIGN);
if (!skb)
break;
@@ -170,29 +166,19 @@ static void mv643xx_eth_rx_task(void *data)
}
skb_reserve(skb, ETH_HW_IP_ALIGN);
}
- clear_bit(0, &mp->rx_task_busy);
/*
* If RX ring is empty of SKB, set a timer to try allocating
- * again in a later time .
+ * again at a later time.
*/
- if ((mp->rx_desc_count == 0) && (mp->rx_timer_flag == 0)) {
+ if (mp->rx_desc_count == 0) {
printk(KERN_INFO "%s: Rx ring is empty\n", dev->name);
- /* After 100mSec */
- mp->timeout.expires = jiffies + (HZ / 10);
+ mp->timeout.expires = jiffies + (HZ / 10); /* 100 mSec */
add_timer(&mp->timeout);
- mp->rx_timer_flag = 1;
- }
-#ifdef MV643XX_RX_QUEUE_FILL_ON_TASK
- else {
- /* Return interrupts */
- mv_write(MV643XX_ETH_INTERRUPT_MASK_REG(mp->port_num),
- INT_UNMASK_ALL);
}
-#endif
}
/*
- * mv643xx_eth_rx_task_timer_wrapper
+ * mv643xx_eth_rx_refill_descs_timer_wrapper
*
* Timer routine to wake up RX queue filling task. This function is
* used only in case the RX queue is empty, and all alloc_skb has
@@ -201,13 +187,9 @@ static void mv643xx_eth_rx_task(void *data)
* Input : pointer to ethernet interface network device structure
* Output : N/A
*/
-static void mv643xx_eth_rx_task_timer_wrapper(unsigned long data)
+static inline void mv643xx_eth_rx_refill_descs_timer_wrapper(unsigned long data)
{
- struct net_device *dev = (struct net_device *)data;
- struct mv643xx_private *mp = netdev_priv(dev);
-
- mp->rx_timer_flag = 0;
- mv643xx_eth_rx_task((void *)data);
+ mv643xx_eth_rx_refill_descs((struct net_device *)data);
}
/*
@@ -451,6 +433,7 @@ static int mv643xx_eth_receive_queue(struct net_device *dev, int budget)
}
dev->last_rx = jiffies;
}
+ mv643xx_eth_rx_refill_descs(dev); /* Fill RX ring with skb's */
return received_packets;
}
@@ -531,18 +514,6 @@ static irqreturn_t mv643xx_eth_int_handler(int irq, void *dev_id,
eth_int_cause_ext = mv_read(
MV643XX_ETH_INTERRUPT_CAUSE_EXTEND_REG(port_num)) &
ETH_INT_UNMASK_ALL_EXT;
-#ifdef MV643XX_RX_QUEUE_FILL_ON_TASK
- /* Mask all interrupts on ethernet port */
- mv_write(MV643XX_ETH_INTERRUPT_MASK_REG(port_num),
- INT_MASK_ALL);
- /* wait for previous write to take effect */
- mv_read(MV643XX_ETH_INTERRUPT_MASK_REG(port_num));
-
- queue_task(&mp->rx_task, &tq_immediate);
- mark_bh(IMMEDIATE_BH);
-#else
- mp->rx_task.func(dev);
-#endif
mv_write(MV643XX_ETH_INTERRUPT_CAUSE_EXTEND_REG(port_num),
~eth_int_cause_ext);
}
@@ -810,15 +781,10 @@ static int mv643xx_eth_open(struct net_device *dev)
eth_port_init(mp);
- INIT_WORK(&mp->rx_task, (void (*)(void *))mv643xx_eth_rx_task, dev);
-
memset(&mp->timeout, 0, sizeof(struct timer_list));
- mp->timeout.function = mv643xx_eth_rx_task_timer_wrapper;
+ mp->timeout.function = mv643xx_eth_rx_refill_descs_timer_wrapper;
mp->timeout.data = (unsigned long)dev;
- mp->rx_task_busy = 0;
- mp->rx_timer_flag = 0;
-
/* Allocate RX and TX skb rings */
mp->rx_skb = kmalloc(sizeof(*mp->rx_skb) * mp->rx_ring_size,
GFP_KERNEL);
@@ -891,7 +857,7 @@ static int mv643xx_eth_open(struct net_device *dev)
ether_init_rx_desc_ring(mp);
- mv643xx_eth_rx_task(dev); /* Fill RX ring with skb's */
+ mv643xx_eth_rx_refill_descs(dev); /* Fill RX ring with skb's */
/* Clear any pending ethernet port interrupts */
mv_write(MV643XX_ETH_INTERRUPT_CAUSE_REG(port_num), 0);
@@ -1043,7 +1009,6 @@ static int mv643xx_poll(struct net_device *dev, int *budget)
if (orig_budget > dev->quota)
orig_budget = dev->quota;
work_done = mv643xx_eth_receive_queue(dev, orig_budget);
- mp->rx_task.func(dev);
*budget -= work_done;
dev->quota -= work_done;
if (work_done >= orig_budget)
diff --git a/drivers/net/mv643xx_eth.h b/drivers/net/mv643xx_eth.h
index df2c7615420..f8742e1edea 100644
--- a/drivers/net/mv643xx_eth.h
+++ b/drivers/net/mv643xx_eth.h
@@ -52,7 +52,6 @@
#define MV643XX_CHECKSUM_OFFLOAD_TX
#define MV643XX_NAPI
#define MV643XX_TX_FAST_REFILL
-#undef MV643XX_RX_QUEUE_FILL_ON_TASK /* Does not work, yet */
#undef MV643XX_COAL
/*
@@ -385,17 +384,10 @@ struct mv643xx_private {
int rx_desc_count;
/*
- * rx_task used to fill RX ring out of bottom half context
- */
- struct work_struct rx_task;
-
- /*
* Used in case RX Ring is empty, which can be caused when
* system does not have resources (skb's)
*/
struct timer_list timeout;
- long rx_task_busy __attribute__ ((aligned(SMP_CACHE_BYTES)));
- unsigned rx_timer_flag;
u32 rx_int_coal;
u32 tx_int_coal;