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r6040: handle RX fifo full and no descriptor interrupts

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This patch allows the MAC to handle the RX FIFO full
and no descriptor available interrupts. While we are at it
replace the TX interrupt with its corresponding definition.

Signed-off-by: Florian Fainelli <florian.fainelli@telecomint.eu>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Florian Fainelli 2008-07-13 14:35:32 +02:00 committed by Jeff Garzik
parent 31718dedf6
commit e24ddf3aa8
1 changed files with 15 additions and 7 deletions
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22
drivers/net/r6040.c
View file

@ -163,9 +163,9 @@ MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("RDC R6040 NAPI PCI FastEthernet driver"); MODULE_DESCRIPTION("RDC R6040 NAPI PCI FastEthernet driver");
/* RX and TX interrupts that we handle */ /* RX and TX interrupts that we handle */
#define RX_INT (RX_FINISH) #define RX_INTS (RX_FIFO_FULL | RX_NO_DESC | RX_FINISH)
#define TX_INT (TX_FINISH) #define TX_INTS (TX_FINISH)
#define INT_MASK (RX_INT | TX_INT) #define INT_MASK (RX_INTS | TX_INTS)
struct r6040_descriptor { struct r6040_descriptor {
u16 status, len; /* 0-3 */ u16 status, len; /* 0-3 */
@ -671,7 +671,7 @@ static int r6040_poll(struct napi_struct *napi, int budget)
if (work_done < budget) { if (work_done < budget) {
netif_rx_complete(dev, napi); netif_rx_complete(dev, napi);
/* Enable RX interrupt */ /* Enable RX interrupt */
iowrite16(ioread16(ioaddr + MIER) | RX_INT, ioaddr + MIER); iowrite16(ioread16(ioaddr + MIER) | RX_INTS, ioaddr + MIER);
} }
return work_done; return work_done;
} }
@ -693,14 +693,22 @@ static irqreturn_t r6040_interrupt(int irq, void *dev_id)
return IRQ_NONE; return IRQ_NONE;
/* RX interrupt request */ /* RX interrupt request */
if (status & 0x01) { if (status & RX_INTS) {
if (status & RX_NO_DESC) {
/* RX descriptor unavailable */
dev->stats.rx_dropped++;
dev->stats.rx_missed_errors++;
}
if (status & RX_FIFO_FULL)
dev->stats.rx_fifo_errors++;
/* Mask off RX interrupt */ /* Mask off RX interrupt */
iowrite16(ioread16(ioaddr + MIER) & ~RX_INT, ioaddr + MIER); iowrite16(ioread16(ioaddr + MIER) & ~RX_INTS, ioaddr + MIER);
netif_rx_schedule(dev, &lp->napi); netif_rx_schedule(dev, &lp->napi);
} }
/* TX interrupt request */ /* TX interrupt request */
if (status & 0x10) if (status & TX_INTS)
r6040_tx(dev); r6040_tx(dev);
return IRQ_HANDLED; return IRQ_HANDLED;