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authorJoakim Tjernlund <Joakim.Tjernlund@transmode.se>2009-04-17 14:03:48 +0200
committerDavid S. Miller <davem@davemloft.net>2009-04-21 11:07:17 +0200
commit0cededf3ffbb775c3716aa1d246338fdc24b1259 (patch)
treeb8606da4301258e2919a0d5322988cde856661fc
parentrtl8139: unify the struct's name (diff)
downloadlinux-0cededf3ffbb775c3716aa1d246338fdc24b1259.tar.xz
linux-0cededf3ffbb775c3716aa1d246338fdc24b1259.zip
ucc_geth: Move freeing of TX packets to NAPI context
This will make the system alot more responsive while ping flooding the ucc_geth ethernet interface. Also set NAPI weight to 64 as this is a common value. Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se> Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/net/ucc_geth.c31
-rw-r--r--drivers/net/ucc_geth.h1
2 files changed, 11 insertions, 21 deletions
diff --git a/drivers/net/ucc_geth.c b/drivers/net/ucc_geth.c
index d3f39e86eb95..98f961e92ca9 100644
--- a/drivers/net/ucc_geth.c
+++ b/drivers/net/ucc_geth.c
@@ -3216,7 +3216,7 @@ static int ucc_geth_tx(struct net_device *dev, u8 txQ)
dev->stats.tx_packets++;
/* Free the sk buffer associated with this TxBD */
- dev_kfree_skb_irq(ugeth->
+ dev_kfree_skb(ugeth->
tx_skbuff[txQ][ugeth->skb_dirtytx[txQ]]);
ugeth->tx_skbuff[txQ][ugeth->skb_dirtytx[txQ]] = NULL;
ugeth->skb_dirtytx[txQ] =
@@ -3250,9 +3250,15 @@ static int ucc_geth_poll(struct napi_struct *napi, int budget)
for (i = 0; i < ug_info->numQueuesRx; i++)
howmany += ucc_geth_rx(ugeth, i, budget - howmany);
+ /* Tx event processing */
+ spin_lock(&ugeth->lock);
+ for (i = 0; i < ug_info->numQueuesTx; i++)
+ ucc_geth_tx(ugeth->ndev, i);
+ spin_unlock(&ugeth->lock);
+
if (howmany < budget) {
napi_complete(napi);
- setbits32(ugeth->uccf->p_uccm, UCCE_RX_EVENTS);
+ setbits32(ugeth->uccf->p_uccm, UCCE_RX_EVENTS | UCCE_TX_EVENTS);
}
return howmany;
@@ -3266,8 +3272,6 @@ static irqreturn_t ucc_geth_irq_handler(int irq, void *info)
struct ucc_geth_info *ug_info;
register u32 ucce;
register u32 uccm;
- register u32 tx_mask;
- u8 i;
ugeth_vdbg("%s: IN", __func__);
@@ -3281,27 +3285,14 @@ static irqreturn_t ucc_geth_irq_handler(int irq, void *info)
out_be32(uccf->p_ucce, ucce);
/* check for receive events that require processing */
- if (ucce & UCCE_RX_EVENTS) {
+ if (ucce & (UCCE_RX_EVENTS | UCCE_TX_EVENTS)) {
if (napi_schedule_prep(&ugeth->napi)) {
- uccm &= ~UCCE_RX_EVENTS;
+ uccm &= ~(UCCE_RX_EVENTS | UCCE_TX_EVENTS);
out_be32(uccf->p_uccm, uccm);
__napi_schedule(&ugeth->napi);
}
}
- /* Tx event processing */
- if (ucce & UCCE_TX_EVENTS) {
- spin_lock(&ugeth->lock);
- tx_mask = UCC_GETH_UCCE_TXB0;
- for (i = 0; i < ug_info->numQueuesTx; i++) {
- if (ucce & tx_mask)
- ucc_geth_tx(dev, i);
- ucce &= ~tx_mask;
- tx_mask <<= 1;
- }
- spin_unlock(&ugeth->lock);
- }
-
/* Errors and other events */
if (ucce & UCCE_OTHER) {
if (ucce & UCC_GETH_UCCE_BSY)
@@ -3734,7 +3725,7 @@ static int ucc_geth_probe(struct of_device* ofdev, const struct of_device_id *ma
dev->netdev_ops = &ucc_geth_netdev_ops;
dev->watchdog_timeo = TX_TIMEOUT;
INIT_WORK(&ugeth->timeout_work, ucc_geth_timeout_work);
- netif_napi_add(dev, &ugeth->napi, ucc_geth_poll, UCC_GETH_DEV_WEIGHT);
+ netif_napi_add(dev, &ugeth->napi, ucc_geth_poll, 64);
dev->mtu = 1500;
ugeth->msg_enable = netif_msg_init(debug.msg_enable, UGETH_MSG_DEFAULT);
diff --git a/drivers/net/ucc_geth.h b/drivers/net/ucc_geth.h
index 2f8ee7c87efe..602764799df0 100644
--- a/drivers/net/ucc_geth.h
+++ b/drivers/net/ucc_geth.h
@@ -852,7 +852,6 @@ struct ucc_geth_hardware_statistics {
/* Driver definitions */
#define TX_BD_RING_LEN 0x10
#define RX_BD_RING_LEN 0x10
-#define UCC_GETH_DEV_WEIGHT TX_BD_RING_LEN
#define TX_RING_MOD_MASK(size) (size-1)
#define RX_RING_MOD_MASK(size) (size-1)