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authorOlof Johansson <olof@lixom.net>2007-05-08 00:47:26 -0500
committerJeff Garzik <jeff@garzik.org>2007-05-08 01:47:53 -0400
commit1b0335ea30bf85eecffd21be64b7653407d6259a (patch)
tree60bc4617065cd4db1c05984b7e2bae913bae7b39 /drivers/net
parent771f7404a9deca902594823d616cd7a84f827982 (diff)
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.c44
1 files changed, 41 insertions, 3 deletions
diff --git a/drivers/net/pasemi_mac.c b/drivers/net/pasemi_mac.c
index c7995d77ccf..73e79f35a42 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 */