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[PATCH] skge: use auto masking of irqs

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Improve performance of skge driver by not touching irq mask
register as much. Since the interrupt source auto-masks, the driver
can just leave it disabled until the end of the soft irq.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Stephen Hemminger 2006-03-21 10:57:00 -08:00 committed by Jeff Garzik
parent 00a6cae288
commit cfc3ed796e
2 changed files with 21 additions and 34 deletions
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52
drivers/net/skge.c
View File

@ -104,7 +104,6 @@ static const int txqaddr[] = { Q_XA1, Q_XA2 };
static const int rxqaddr[] = { Q_R1, Q_R2 };
static const u32 rxirqmask[] = { IS_R1_F, IS_R2_F };
static const u32 txirqmask[] = { IS_XA1_F, IS_XA2_F };
static const u32 portirqmask[] = { IS_PORT_1, IS_PORT_2 };
static int skge_get_regs_len(struct net_device *dev)
{
@ -2184,12 +2183,6 @@ static int skge_up(struct net_device *dev)
skge->tx_avail = skge->tx_ring.count - 1;
/* Enable IRQ from port */
spin_lock_irq(&hw->hw_lock);
hw->intr_mask |= portirqmask[port];
skge_write32(hw, B0_IMSK, hw->intr_mask);
spin_unlock_irq(&hw->hw_lock);
/* Initialize MAC */
spin_lock_bh(&hw->phy_lock);
if (hw->chip_id == CHIP_ID_GENESIS)
@ -2246,11 +2239,6 @@ static int skge_down(struct net_device *dev)
else
yukon_stop(skge);
spin_lock_irq(&hw->hw_lock);
hw->intr_mask &= ~portirqmask[skge->port];
skge_write32(hw, B0_IMSK, hw->intr_mask);
spin_unlock_irq(&hw->hw_lock);
/* Stop transmitter */
skge_write8(hw, Q_ADDR(txqaddr[port], Q_CSR), CSR_STOP);
skge_write32(hw, RB_ADDR(txqaddr[port], RB_CTRL),
@ -2734,11 +2722,9 @@ static int skge_poll(struct net_device *dev, int *budget)
if (work_done >= to_do)
return 1; /* not done */
spin_lock_irq(&hw->hw_lock);
__netif_rx_complete(dev);
hw->intr_mask |= portirqmask[skge->port];
netif_rx_complete(dev);
hw->intr_mask |= skge->port == 0 ? (IS_R1_F|IS_XA1_F) : (IS_R2_F|IS_XA2_F);
skge_write32(hw, B0_IMSK, hw->intr_mask);
spin_unlock_irq(&hw->hw_lock);
return 0;
}
@ -2850,12 +2836,11 @@ static void skge_extirq(unsigned long data)
int port;
spin_lock(&hw->phy_lock);
for (port = 0; port < 2; port++) {
for (port = 0; port < hw->ports; port++) {
struct net_device *dev = hw->dev[port];
if (dev && netif_running(dev)) {
struct skge_port *skge = netdev_priv(dev);
if (netif_running(dev)) {
if (hw->chip_id != CHIP_ID_GENESIS)
yukon_phy_intr(skge);
else
@ -2864,21 +2849,25 @@ static void skge_extirq(unsigned long data)
}
spin_unlock(&hw->phy_lock);
spin_lock_irq(&hw->hw_lock);
hw->intr_mask |= IS_EXT_REG;
skge_write32(hw, B0_IMSK, hw->intr_mask);
spin_unlock_irq(&hw->hw_lock);
}
static irqreturn_t skge_intr(int irq, void *dev_id, struct pt_regs *regs)
{
struct skge_hw *hw = dev_id;
u32 status = skge_read32(hw, B0_SP_ISRC);
u32 status;
if (status == 0 || status == ~0) /* hotplug or shared irq */
/* Reading this register masks IRQ */
status = skge_read32(hw, B0_SP_ISRC);
if (status == 0)
return IRQ_NONE;
spin_lock(&hw->hw_lock);
if (status & IS_EXT_REG) {
hw->intr_mask &= ~IS_EXT_REG;
tasklet_schedule(&hw->ext_tasklet);
}
if (status & (IS_R1_F|IS_XA1_F)) {
skge_write8(hw, Q_ADDR(Q_R1, Q_CSR), CSR_IRQ_CL_F);
hw->intr_mask &= ~(IS_R1_F|IS_XA1_F);
@ -2891,6 +2880,9 @@ static irqreturn_t skge_intr(int irq, void *dev_id, struct pt_regs *regs)
netif_rx_schedule(hw->dev[1]);
}
if (likely((status & hw->intr_mask) == 0))
return IRQ_HANDLED;
if (status & IS_PA_TO_RX1) {
struct skge_port *skge = netdev_priv(hw->dev[0]);
++skge->net_stats.rx_over_errors;
@ -2918,13 +2910,7 @@ static irqreturn_t skge_intr(int irq, void *dev_id, struct pt_regs *regs)
if (status & IS_HW_ERR)
skge_error_irq(hw);
if (status & IS_EXT_REG) {
hw->intr_mask &= ~IS_EXT_REG;
tasklet_schedule(&hw->ext_tasklet);
}
skge_write32(hw, B0_IMSK, hw->intr_mask);
spin_unlock(&hw->hw_lock);
return IRQ_HANDLED;
}
@ -3070,7 +3056,10 @@ static int skge_reset(struct skge_hw *hw)
else
hw->ram_size = t8 * 4096;
hw->intr_mask = IS_HW_ERR | IS_EXT_REG;
hw->intr_mask = IS_HW_ERR | IS_EXT_REG | IS_PORT_1;
if (hw->ports > 1)
hw->intr_mask |= IS_PORT_2;
if (hw->chip_id == CHIP_ID_GENESIS)
genesis_init(hw);
else {
@ -3293,7 +3282,6 @@ static int __devinit skge_probe(struct pci_dev *pdev,
hw->pdev = pdev;
spin_lock_init(&hw->phy_lock);
spin_lock_init(&hw->hw_lock);
tasklet_init(&hw->ext_tasklet, skge_extirq, (unsigned long) hw);
hw->regs = ioremap_nocache(pci_resource_start(pdev, 0), 0x4000);

1
drivers/net/skge.h
View File

@ -2402,7 +2402,6 @@ struct skge_hw {
struct tasklet_struct ext_tasklet;
spinlock_t phy_lock;
spinlock_t hw_lock;
};
enum {