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pasemi_mac: Abstract and fix up interrupt restart routines 

Abstract out (and fix up) the interrupt restart routines, making
sure we start out in a consistent state.

Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Olof Johansson 2007-05-08 00:47:26 -05:00 committed by Jeff Garzik
parent 771f7404a9
commit 1b0335ea30
1 changed files with 41 additions and 3 deletions
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44
drivers/net/pasemi_mac.c
View File

@ -362,6 +362,42 @@ static void pasemi_mac_replenish_rx_ring(struct net_device *dev)
mac->rx->next_to_fill += count;
}
static void pasemi_mac_restart_rx_intr(struct pasemi_mac *mac)
{
unsigned int reg, stat;
/* Re-enable packet count interrupts: finally
* ack the packet count interrupt we got in rx_intr.
*/
pci_read_config_dword(mac->iob_pdev,
PAS_IOB_DMA_RXCH_STAT(mac->dma_rxch),
&stat);
reg = PAS_IOB_DMA_RXCH_RESET_PCNT(stat & PAS_IOB_DMA_RXCH_STAT_CNTDEL_M)
| PAS_IOB_DMA_RXCH_RESET_PINTC;
pci_write_config_dword(mac->iob_pdev,
PAS_IOB_DMA_RXCH_RESET(mac->dma_rxch),
reg);
}
static void pasemi_mac_restart_tx_intr(struct pasemi_mac *mac)
{
unsigned int reg, stat;
/* Re-enable packet count interrupts */
pci_read_config_dword(mac->iob_pdev,
PAS_IOB_DMA_TXCH_STAT(mac->dma_txch), &stat);
reg = PAS_IOB_DMA_TXCH_RESET_PCNT(stat & PAS_IOB_DMA_TXCH_STAT_CNTDEL_M)
| PAS_IOB_DMA_TXCH_RESET_PINTC;
pci_write_config_dword(mac->iob_pdev,
PAS_IOB_DMA_TXCH_RESET(mac->dma_txch), reg);
}
static int pasemi_mac_clean_rx(struct pasemi_mac *mac, int limit)
{
unsigned int i;
@ -559,6 +595,10 @@ static int pasemi_mac_open(struct net_device *dev)
pci_write_config_dword(mac->iob_pdev, PAS_IOB_DMA_RXCH_CFG(mac->dma_rxch),
PAS_IOB_DMA_RXCH_CFG_CNTTH(30));
/* Clear out any residual packet count state from firmware */
pasemi_mac_restart_rx_intr(mac);
pasemi_mac_restart_tx_intr(mac);
pci_write_config_dword(mac->iob_pdev, PAS_IOB_DMA_COM_TIMEOUTCFG,
PAS_IOB_DMA_COM_TIMEOUTCFG_TCNT(1000000));
@ -835,9 +875,7 @@ static int pasemi_mac_poll(struct net_device *dev, int *budget)
/* all done, no more packets present */
netif_rx_complete(dev);
/* re-enable receive interrupts */
pci_write_config_dword(mac->iob_pdev, PAS_IOB_DMA_COM_TIMEOUTCFG,
PAS_IOB_DMA_COM_TIMEOUTCFG_TCNT(1000000));
pasemi_mac_restart_rx_intr(mac);
return 0;
} else {
/* used up our quantum, so reschedule */