diff options
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/tg3.c | 76 | ||||
| -rw-r--r-- | drivers/net/tg3.h | 1 |
2 files changed, 72 insertions, 5 deletions
diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c index fb3eb6f8a737..2a17af9bd1ce 100644 --- a/drivers/net/tg3.c +++ b/drivers/net/tg3.c @@ -2907,6 +2907,43 @@ static inline unsigned int tg3_has_work(struct net_device *dev, struct tg3 *tp) return work_exists; } +/* MSI ISR - No need to check for interrupt sharing and no need to + * flush status block and interrupt mailbox. PCI ordering rules + * guarantee that MSI will arrive after the status block. + */ +static irqreturn_t tg3_msi(int irq, void *dev_id, struct pt_regs *regs) +{ + struct net_device *dev = dev_id; + struct tg3 *tp = netdev_priv(dev); + struct tg3_hw_status *sblk = tp->hw_status; + unsigned long flags; + + spin_lock_irqsave(&tp->lock, flags); + + /* + * writing any value to intr-mbox-0 clears PCI INTA# and + * chip-internal interrupt pending events. + * writing non-zero to intr-mbox-0 additional tells the + * NIC to stop sending us irqs, engaging "in-intr-handler" + * event coalescing. + */ + tw32_mailbox(MAILBOX_INTERRUPT_0 + TG3_64BIT_REG_LOW, 0x00000001); + sblk->status &= ~SD_STATUS_UPDATED; + + if (likely(tg3_has_work(dev, tp))) + netif_rx_schedule(dev); /* schedule NAPI poll */ + else { + /* no work, re-enable interrupts + */ + tw32_mailbox(MAILBOX_INTERRUPT_0 + TG3_64BIT_REG_LOW, + 0x00000000); + } + + spin_unlock_irqrestore(&tp->lock, flags); + + return IRQ_RETVAL(1); +} + static irqreturn_t tg3_interrupt(int irq, void *dev_id, struct pt_regs *regs) { struct net_device *dev = dev_id; @@ -2965,7 +3002,9 @@ static int tg3_halt(struct tg3 *); #ifdef CONFIG_NET_POLL_CONTROLLER static void tg3_poll_controller(struct net_device *dev) { - tg3_interrupt(dev->irq, dev, NULL); + struct tg3 *tp = netdev_priv(dev); + + tg3_interrupt(tp->pdev->irq, dev, NULL); } #endif @@ -5778,10 +5817,29 @@ static int tg3_open(struct net_device *dev) if (err) return err; - err = request_irq(dev->irq, tg3_interrupt, - SA_SHIRQ, dev->name, dev); + if ((tp->tg3_flags2 & TG3_FLG2_5750_PLUS) && + (GET_CHIP_REV(tp->pci_chip_rev_id) != CHIPREV_5750_AX) && + (GET_CHIP_REV(tp->pci_chip_rev_id) != CHIPREV_5750_BX)) { + if (pci_enable_msi(tp->pdev) == 0) { + u32 msi_mode; + + msi_mode = tr32(MSGINT_MODE); + tw32(MSGINT_MODE, msi_mode | MSGINT_MODE_ENABLE); + tp->tg3_flags2 |= TG3_FLG2_USING_MSI; + } + } + if (tp->tg3_flags2 & TG3_FLG2_USING_MSI) + err = request_irq(tp->pdev->irq, tg3_msi, + 0, dev->name, dev); + else + err = request_irq(tp->pdev->irq, tg3_interrupt, + SA_SHIRQ, dev->name, dev); if (err) { + if (tp->tg3_flags2 & TG3_FLG2_USING_MSI) { + pci_disable_msi(tp->pdev); + tp->tg3_flags2 &= ~TG3_FLG2_USING_MSI; + } tg3_free_consistent(tp); return err; } @@ -5811,7 +5869,11 @@ static int tg3_open(struct net_device *dev) spin_unlock_irq(&tp->lock); if (err) { - free_irq(dev->irq, dev); + free_irq(tp->pdev->irq, dev); + if (tp->tg3_flags2 & TG3_FLG2_USING_MSI) { + pci_disable_msi(tp->pdev); + tp->tg3_flags2 &= ~TG3_FLG2_USING_MSI; + } tg3_free_consistent(tp); return err; } @@ -6086,7 +6148,11 @@ static int tg3_close(struct net_device *dev) spin_unlock(&tp->tx_lock); spin_unlock_irq(&tp->lock); - free_irq(dev->irq, dev); + free_irq(tp->pdev->irq, dev); + if (tp->tg3_flags2 & TG3_FLG2_USING_MSI) { + pci_disable_msi(tp->pdev); + tp->tg3_flags2 &= ~TG3_FLG2_USING_MSI; + } memcpy(&tp->net_stats_prev, tg3_get_stats(tp->dev), sizeof(tp->net_stats_prev)); diff --git a/drivers/net/tg3.h b/drivers/net/tg3.h index d3f03f0f4c46..8de6f21037ba 100644 --- a/drivers/net/tg3.h +++ b/drivers/net/tg3.h @@ -2123,6 +2123,7 @@ struct tg3 { #define TG3_FLG2_5705_PLUS 0x00040000 #define TG3_FLG2_5750_PLUS 0x00080000 #define TG3_FLG2_PROTECTED_NVRAM 0x00100000 +#define TG3_FLG2_USING_MSI 0x00200000 u32 split_mode_max_reqs; #define SPLIT_MODE_5704_MAX_REQ 3 |