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| author | Olof Johansson <olof@lixom.net> | 2007-05-08 00:47:26 -0500 |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2007-05-08 01:47:53 -0400 |
| commit | 1b0335ea30bf85eecffd21be64b7653407d6259a (patch) | |
| tree | 60bc4617065cd4db1c05984b7e2bae913bae7b39 /drivers/net | |
| parent | 771f7404a9deca902594823d616cd7a84f827982 (diff) | |
| download | kernel_samsung_tuna-1b0335ea30bf85eecffd21be64b7653407d6259a.zip kernel_samsung_tuna-1b0335ea30bf85eecffd21be64b7653407d6259a.tar.gz kernel_samsung_tuna-1b0335ea30bf85eecffd21be64b7653407d6259a.tar.bz2 | |
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>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/pasemi_mac.c | 44 |
1 files changed, 41 insertions, 3 deletions
diff --git a/drivers/net/pasemi_mac.c b/drivers/net/pasemi_mac.c index c7995d7..73e79f3 100644 --- a/drivers/net/pasemi_mac.c +++ b/drivers/net/pasemi_mac.c @@ -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 */ |