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ep93xx_eth: add GRO support 

Use napi_complete_done() instead of __napi_complete() to :

1) Get support of gro_flush_timeout if opt-in
2) Not rearm interrupts for busy-polling users.
3) use standard NAPI API.
4) get rid of baroque code and ease maintenance.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2017-02-04 15:24:56 -08:00 committed by David S. Miller
parent 5b2ec6f2be
commit a396178972
1 changed files with 6 additions and 23 deletions
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29
drivers/net/ethernet/cirrus/ep93xx_eth.c
View File

@ -228,9 +228,10 @@ static void ep93xx_mdio_write(struct net_device *dev, int phy_id, int reg, int d
pr_info("mdio write timed out\n");
}
static int ep93xx_rx(struct net_device *dev, int processed, int budget)
static int ep93xx_rx(struct net_device *dev, int budget)
{
struct ep93xx_priv *ep = netdev_priv(dev);
int processed = 0;
while (processed < budget) {
int entry;
@ -294,7 +295,7 @@ static int ep93xx_rx(struct net_device *dev, int processed, int budget)
skb_put(skb, length);
skb->protocol = eth_type_trans(skb, dev);
netif_receive_skb(skb);
napi_gro_receive(&ep->napi, skb);
dev->stats.rx_packets++;
dev->stats.rx_bytes += length;
@ -310,35 +311,17 @@ err:
return processed;
}
static int ep93xx_have_more_rx(struct ep93xx_priv *ep)
{
struct ep93xx_rstat *rstat = ep->descs->rstat + ep->rx_pointer;
return !!((rstat->rstat0 & RSTAT0_RFP) && (rstat->rstat1 & RSTAT1_RFP));
}
static int ep93xx_poll(struct napi_struct *napi, int budget)
{
struct ep93xx_priv *ep = container_of(napi, struct ep93xx_priv, napi);
struct net_device *dev = ep->dev;
int rx = 0;
poll_some_more:
rx = ep93xx_rx(dev, rx, budget);
if (rx < budget) {
int more = 0;
int rx;
rx = ep93xx_rx(dev, budget);
if (rx < budget && napi_complete_done(napi, rx)) {
spin_lock_irq(&ep->rx_lock);
__napi_complete(napi);
wrl(ep, REG_INTEN, REG_INTEN_TX | REG_INTEN_RX);
if (ep93xx_have_more_rx(ep)) {
wrl(ep, REG_INTEN, REG_INTEN_TX);
wrl(ep, REG_INTSTSP, REG_INTSTS_RX);
more = 1;
}
spin_unlock_irq(&ep->rx_lock);
if (more && napi_reschedule(napi))
goto poll_some_more;
}
if (rx) {