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pasemi_mac: Timer and interrupt fixes 

Timer and interrupt fixes:

* Be pickier with what kind of interrupts are acked to avoid the device to
  get out of sync with the driver state
* Set RX count threshhold to 1 (for NAPI interrupted mode), TX count
  threshold to 32.
* Set timer thresholds to current max (~16ms).

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 00:47:32 -05:00 committed by Jeff Garzik
parent 1b0335ea30
commit 6dfa7522d8
2 changed files with 30 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

41
drivers/net/pasemi_mac.c
View File

@ -526,18 +526,28 @@ static irqreturn_t pasemi_mac_rx_intr(int irq, void *data)
struct pasemi_mac *mac = netdev_priv(dev);
unsigned int reg;
if (!(*mac->rx_status & PAS_STATUS_INT))
if (!(*mac->rx_status & PAS_STATUS_CAUSE_M))
return IRQ_NONE;
netif_rx_schedule(dev);
pci_write_config_dword(mac->iob_pdev, PAS_IOB_DMA_COM_TIMEOUTCFG,
PAS_IOB_DMA_COM_TIMEOUTCFG_TCNT(0));
if (*mac->rx_status & PAS_STATUS_ERROR)
printk("rx_status reported error\n");
reg = PAS_IOB_DMA_RXCH_RESET_PINTC | PAS_IOB_DMA_RXCH_RESET_SINTC |
PAS_IOB_DMA_RXCH_RESET_DINTC;
/* Don't reset packet count so it won't fire again but clear
* all others.
*/
pci_read_config_dword(mac->dma_pdev, PAS_DMA_RXINT_RCMDSTA(mac->dma_if), &reg);
reg = 0;
if (*mac->rx_status & PAS_STATUS_SOFT)
reg |= PAS_IOB_DMA_RXCH_RESET_SINTC;
if (*mac->rx_status & PAS_STATUS_ERROR)
reg |= PAS_IOB_DMA_RXCH_RESET_DINTC;
if (*mac->rx_status & PAS_STATUS_TIMER)
reg |= PAS_IOB_DMA_RXCH_RESET_TINTC;
netif_rx_schedule(dev);
pci_write_config_dword(mac->iob_pdev,
PAS_IOB_DMA_RXCH_RESET(mac->dma_rxch), reg);
@ -551,14 +561,17 @@ static irqreturn_t pasemi_mac_tx_intr(int irq, void *data)
struct pasemi_mac *mac = netdev_priv(dev);
unsigned int reg;
if (!(*mac->tx_status & PAS_STATUS_INT))
if (!(*mac->tx_status & PAS_STATUS_CAUSE_M))
return IRQ_NONE;
pasemi_mac_clean_tx(mac);
reg = PAS_IOB_DMA_TXCH_RESET_PINTC | PAS_IOB_DMA_TXCH_RESET_SINTC;
if (*mac->tx_status & PAS_STATUS_TIMER)
reg |= PAS_IOB_DMA_TXCH_RESET_TINTC;
reg = PAS_IOB_DMA_TXCH_RESET_PINTC;
if (*mac->tx_status & PAS_STATUS_SOFT)
reg |= PAS_IOB_DMA_TXCH_RESET_SINTC;
if (*mac->tx_status & PAS_STATUS_ERROR)
reg |= PAS_IOB_DMA_TXCH_RESET_DINTC;
pci_write_config_dword(mac->iob_pdev, PAS_IOB_DMA_TXCH_RESET(mac->dma_txch),
reg);
@ -593,14 +606,18 @@ static int pasemi_mac_open(struct net_device *dev)
flags |= PAS_MAC_CFG_PCFG_TSR_1G | PAS_MAC_CFG_PCFG_SPD_1G;
pci_write_config_dword(mac->iob_pdev, PAS_IOB_DMA_RXCH_CFG(mac->dma_rxch),
PAS_IOB_DMA_RXCH_CFG_CNTTH(30));
PAS_IOB_DMA_RXCH_CFG_CNTTH(1));
pci_write_config_dword(mac->iob_pdev, PAS_IOB_DMA_TXCH_CFG(mac->dma_txch),
PAS_IOB_DMA_TXCH_CFG_CNTTH(32));
/* Clear out any residual packet count state from firmware */
pasemi_mac_restart_rx_intr(mac);
pasemi_mac_restart_tx_intr(mac);
/* 0xffffff is max value, about 16ms */
pci_write_config_dword(mac->iob_pdev, PAS_IOB_DMA_COM_TIMEOUTCFG,
PAS_IOB_DMA_COM_TIMEOUTCFG_TCNT(1000000));
PAS_IOB_DMA_COM_TIMEOUTCFG_TCNT(0xffffff));
pci_write_config_dword(mac->pdev, PAS_MAC_CFG_PCFG, flags);

1
drivers/net/pasemi_mac.h
View File

@ -299,6 +299,7 @@ enum {
#define PAS_STATUS_DCNT_S 16
#define PAS_STATUS_BPCNT_M 0x0000ffff00000000ull
#define PAS_STATUS_BPCNT_S 32
#define PAS_STATUS_CAUSE_M 0xf000000000000000ull
#define PAS_STATUS_TIMER 0x1000000000000000ull
#define PAS_STATUS_ERROR 0x2000000000000000ull
#define PAS_STATUS_SOFT 0x4000000000000000ull