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forcedeth: add/modify tx done with limit 

There are two tx_done routines to handle tx completion processing. Both
these functions now take in a limit value and return the amount of tx
completions. This will be used by a future patch to determine the total
amount of work done.

Signed-off-by: Ayaz Abdulla <aabdulla@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ayaz Abdulla 2009-03-05 08:02:10 +00:00 committed by David S. Miller
parent 2daac3e8f8
commit 33912e72d0
1 changed files with 14 additions and 6 deletions
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20
drivers/net/forcedeth.c
View File

@ -2397,14 +2397,16 @@ static inline void nv_tx_flip_ownership(struct net_device *dev)
*
* Caller must own np->lock.
*/
static void nv_tx_done(struct net_device *dev)
static int nv_tx_done(struct net_device *dev, int limit)
{
struct fe_priv *np = netdev_priv(dev);
u32 flags;
int tx_work = 0;
struct ring_desc* orig_get_tx = np->get_tx.orig;
while ((np->get_tx.orig != np->put_tx.orig) &&
!((flags = le32_to_cpu(np->get_tx.orig->flaglen)) & NV_TX_VALID)) {
!((flags = le32_to_cpu(np->get_tx.orig->flaglen)) & NV_TX_VALID) &&
(tx_work < limit)) {
dprintk(KERN_DEBUG "%s: nv_tx_done: flags 0x%x.\n",
dev->name, flags);
@ -2430,6 +2432,7 @@ static void nv_tx_done(struct net_device *dev)
}
dev_kfree_skb_any(np->get_tx_ctx->skb);
np->get_tx_ctx->skb = NULL;
tx_work++;
}
} else {
if (flags & NV_TX2_LASTPACKET) {
@ -2447,6 +2450,7 @@ static void nv_tx_done(struct net_device *dev)
}
dev_kfree_skb_any(np->get_tx_ctx->skb);
np->get_tx_ctx->skb = NULL;
tx_work++;
}
}
if (unlikely(np->get_tx.orig++ == np->last_tx.orig))
@ -2458,17 +2462,19 @@ static void nv_tx_done(struct net_device *dev)
np->tx_stop = 0;
netif_wake_queue(dev);
}
return tx_work;
}
static void nv_tx_done_optimized(struct net_device *dev, int limit)
static int nv_tx_done_optimized(struct net_device *dev, int limit)
{
struct fe_priv *np = netdev_priv(dev);
u32 flags;
int tx_work = 0;
struct ring_desc_ex* orig_get_tx = np->get_tx.ex;
while ((np->get_tx.ex != np->put_tx.ex) &&
!((flags = le32_to_cpu(np->get_tx.ex->flaglen)) & NV_TX_VALID) &&
(limit-- > 0)) {
(tx_work < limit)) {
dprintk(KERN_DEBUG "%s: nv_tx_done_optimized: flags 0x%x.\n",
dev->name, flags);
@ -2492,6 +2498,7 @@ static void nv_tx_done_optimized(struct net_device *dev, int limit)
dev_kfree_skb_any(np->get_tx_ctx->skb);
np->get_tx_ctx->skb = NULL;
tx_work++;
if (np->tx_limit) {
nv_tx_flip_ownership(dev);
@ -2506,6 +2513,7 @@ static void nv_tx_done_optimized(struct net_device *dev, int limit)
np->tx_stop = 0;
netif_wake_queue(dev);
}
return tx_work;
}
/*
@ -2578,7 +2586,7 @@ static void nv_tx_timeout(struct net_device *dev)
/* 2) check that the packets were not sent already: */
if (!nv_optimized(np))
nv_tx_done(dev);
nv_tx_done(dev, np->tx_ring_size);
else
nv_tx_done_optimized(dev, np->tx_ring_size);
@ -3433,7 +3441,7 @@ static irqreturn_t nv_nic_irq(int foo, void *data)
nv_msi_workaround(np);
spin_lock(&np->lock);
nv_tx_done(dev);
nv_tx_done(dev, np->tx_ring_size);
spin_unlock(&np->lock);
#ifdef CONFIG_FORCEDETH_NAPI