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atl1: add napi process of tx interrupts

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Make the tx ints processing same as rx ones via napi.
The idea got from e1000. The interrupt disabling is
still not fine grained.

Signed-off-by: Tony Zelenoff <antonz@parallels.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tony Zelenoff 2012-04-13 06:09:48 +00:00 committed by David S. Miller
parent 6294512bbe
commit 0dbab2fb1d
1 changed files with 16 additions and 11 deletions
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27
drivers/net/ethernet/atheros/atlx/atl1.c
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@ -2069,12 +2069,13 @@ static int atl1_intr_rx(struct atl1_adapter *adapter, int budget)
return count; return count;
} }
static void atl1_intr_tx(struct atl1_adapter *adapter) static int atl1_intr_tx(struct atl1_adapter *adapter)
{ {
struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring; struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
struct atl1_buffer *buffer_info; struct atl1_buffer *buffer_info;
u16 sw_tpd_next_to_clean; u16 sw_tpd_next_to_clean;
u16 cmb_tpd_next_to_clean; u16 cmb_tpd_next_to_clean;
int count = 0;
sw_tpd_next_to_clean = atomic_read(&tpd_ring->next_to_clean); sw_tpd_next_to_clean = atomic_read(&tpd_ring->next_to_clean);
cmb_tpd_next_to_clean = le16_to_cpu(adapter->cmb.cmb->tpd_cons_idx); cmb_tpd_next_to_clean = le16_to_cpu(adapter->cmb.cmb->tpd_cons_idx);
@ -2094,12 +2095,16 @@ static void atl1_intr_tx(struct atl1_adapter *adapter)
if (++sw_tpd_next_to_clean == tpd_ring->count) if (++sw_tpd_next_to_clean == tpd_ring->count)
sw_tpd_next_to_clean = 0; sw_tpd_next_to_clean = 0;
count++;
} }
atomic_set(&tpd_ring->next_to_clean, sw_tpd_next_to_clean); atomic_set(&tpd_ring->next_to_clean, sw_tpd_next_to_clean);
if (netif_queue_stopped(adapter->netdev) && if (netif_queue_stopped(adapter->netdev) &&
netif_carrier_ok(adapter->netdev)) netif_carrier_ok(adapter->netdev))
netif_wake_queue(adapter->netdev); netif_wake_queue(adapter->netdev);
return count;
} }
static u16 atl1_tpd_avail(struct atl1_tpd_ring *tpd_ring) static u16 atl1_tpd_avail(struct atl1_tpd_ring *tpd_ring)
@ -2441,11 +2446,14 @@ static netdev_tx_t atl1_xmit_frame(struct sk_buff *skb,
return NETDEV_TX_OK; return NETDEV_TX_OK;
} }
static int atl1_rx_clean(struct napi_struct *napi, int budget) static int atl1_rings_clean(struct napi_struct *napi, int budget)
{ {
struct atl1_adapter *adapter = container_of(napi, struct atl1_adapter, napi); struct atl1_adapter *adapter = container_of(napi, struct atl1_adapter, napi);
int work_done = atl1_intr_rx(adapter, budget); int work_done = atl1_intr_rx(adapter, budget);
if (atl1_intr_tx(adapter))
work_done = budget;
/* Let's come again to process some more packets */ /* Let's come again to process some more packets */
if (work_done >= budget) if (work_done >= budget)
return work_done; return work_done;
@ -2456,7 +2464,7 @@ static int atl1_rx_clean(struct napi_struct *napi, int budget)
return work_done; return work_done;
} }
static inline int atl1_sched_rx(struct atl1_adapter* adapter) static inline int atl1_sched_rings_clean(struct atl1_adapter* adapter)
{ {
if (likely(napi_schedule_prep(&adapter->napi))) { if (likely(napi_schedule_prep(&adapter->napi))) {
__napi_schedule(&adapter->napi); __napi_schedule(&adapter->napi);
@ -2527,12 +2535,9 @@ static irqreturn_t atl1_intr(int irq, void *data)
atl1_check_for_link(adapter); atl1_check_for_link(adapter);
} }
/* transmit event */ /* transmit or receive event */
if (status & ISR_CMB_TX) if (status & (ISR_CMB_TX | ISR_CMB_RX) &&
atl1_intr_tx(adapter); atl1_sched_rings_clean(adapter))
/* rx event */
if (status & ISR_CMB_RX && atl1_sched_rx(adapter))
/* Go away with INTs disabled */ /* Go away with INTs disabled */
return IRQ_HANDLED; return IRQ_HANDLED;
@ -2545,7 +2550,7 @@ static irqreturn_t atl1_intr(int irq, void *data)
&adapter->pdev->dev, &adapter->pdev->dev,
"rx exception, ISR = 0x%x\n", "rx exception, ISR = 0x%x\n",
status); status);
if (atl1_sched_rx(adapter)) if (atl1_sched_rings_clean(adapter))
return IRQ_HANDLED; return IRQ_HANDLED;
} }
@ -3005,7 +3010,7 @@ static int __devinit atl1_probe(struct pci_dev *pdev,
netdev->netdev_ops = &atl1_netdev_ops; netdev->netdev_ops = &atl1_netdev_ops;
netdev->watchdog_timeo = 5 * HZ; netdev->watchdog_timeo = 5 * HZ;
netif_napi_add(netdev, &adapter->napi, atl1_rx_clean, 64); netif_napi_add(netdev, &adapter->napi, atl1_rings_clean, 64);
netdev->ethtool_ops = &atl1_ethtool_ops; netdev->ethtool_ops = &atl1_ethtool_ops;
adapter->bd_number = cards_found; adapter->bd_number = cards_found;