[PATCH] skge: use workq for PHY handling
Since accessing the PHY can take 100's of usecs, use a work queue to
allow spinning in outside of soft/hard irq.
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/net/skge.c b/drivers/net/skge.c
index 5ca5a1b..55245db 100644
--- a/drivers/net/skge.c
+++ b/drivers/net/skge.c
@@ -603,7 +603,7 @@
struct skge_hw *hw = skge->hw;
int port = skge->port;
- spin_lock_bh(&hw->phy_lock);
+ mutex_lock(&hw->phy_mutex);
if (hw->chip_id == CHIP_ID_GENESIS) {
switch (mode) {
case LED_MODE_OFF:
@@ -663,7 +663,7 @@
PHY_M_LED_MO_RX(MO_LED_ON));
}
}
- spin_unlock_bh(&hw->phy_lock);
+ mutex_unlock(&hw->phy_mutex);
}
/* blink LED's for finding board */
@@ -2038,7 +2038,7 @@
netif_stop_queue(skge->netdev);
netif_carrier_off(skge->netdev);
- spin_lock_bh(&hw->phy_lock);
+ mutex_lock(&hw->phy_mutex);
if (hw->chip_id == CHIP_ID_GENESIS) {
genesis_reset(hw, port);
genesis_mac_init(hw, port);
@@ -2046,7 +2046,7 @@
yukon_reset(hw, port);
yukon_init(hw, port);
}
- spin_unlock_bh(&hw->phy_lock);
+ mutex_unlock(&hw->phy_mutex);
}
/* Basic MII support */
@@ -2067,12 +2067,12 @@
/* fallthru */
case SIOCGMIIREG: {
u16 val = 0;
- spin_lock_bh(&hw->phy_lock);
+ mutex_lock(&hw->phy_mutex);
if (hw->chip_id == CHIP_ID_GENESIS)
err = __xm_phy_read(hw, skge->port, data->reg_num & 0x1f, &val);
else
err = __gm_phy_read(hw, skge->port, data->reg_num & 0x1f, &val);
- spin_unlock_bh(&hw->phy_lock);
+ mutex_unlock(&hw->phy_mutex);
data->val_out = val;
break;
}
@@ -2081,14 +2081,14 @@
if (!capable(CAP_NET_ADMIN))
return -EPERM;
- spin_lock_bh(&hw->phy_lock);
+ mutex_lock(&hw->phy_mutex);
if (hw->chip_id == CHIP_ID_GENESIS)
err = xm_phy_write(hw, skge->port, data->reg_num & 0x1f,
data->val_in);
else
err = gm_phy_write(hw, skge->port, data->reg_num & 0x1f,
data->val_in);
- spin_unlock_bh(&hw->phy_lock);
+ mutex_unlock(&hw->phy_mutex);
break;
}
return err;
@@ -2191,12 +2191,12 @@
goto free_rx_ring;
/* Initialize MAC */
- spin_lock_bh(&hw->phy_lock);
+ mutex_lock(&hw->phy_mutex);
if (hw->chip_id == CHIP_ID_GENESIS)
genesis_mac_init(hw, port);
else
yukon_mac_init(hw, port);
- spin_unlock_bh(&hw->phy_lock);
+ mutex_unlock(&hw->phy_mutex);
/* Configure RAMbuffers */
chunk = hw->ram_size / ((hw->ports + 1)*2);
@@ -2847,16 +2847,16 @@
}
/*
- * Interrupt from PHY are handled in tasklet (soft irq)
+ * Interrupt from PHY are handled in work queue
* because accessing phy registers requires spin wait which might
* cause excess interrupt latency.
*/
-static void skge_extirq(unsigned long data)
+static void skge_extirq(void *arg)
{
- struct skge_hw *hw = (struct skge_hw *) data;
+ struct skge_hw *hw = arg;
int port;
- spin_lock(&hw->phy_lock);
+ mutex_lock(&hw->phy_mutex);
for (port = 0; port < hw->ports; port++) {
struct net_device *dev = hw->dev[port];
struct skge_port *skge = netdev_priv(dev);
@@ -2868,7 +2868,7 @@
bcom_phy_intr(skge);
}
}
- spin_unlock(&hw->phy_lock);
+ mutex_unlock(&hw->phy_mutex);
hw->intr_mask |= IS_EXT_REG;
skge_write32(hw, B0_IMSK, hw->intr_mask);
@@ -2886,7 +2886,7 @@
if (status & IS_EXT_REG) {
hw->intr_mask &= ~IS_EXT_REG;
- tasklet_schedule(&hw->ext_tasklet);
+ schedule_work(&hw->phy_work);
}
if (status & (IS_R1_F|IS_XA1_F)) {
@@ -2957,7 +2957,7 @@
if (!is_valid_ether_addr(addr->sa_data))
return -EADDRNOTAVAIL;
- spin_lock_bh(&hw->phy_lock);
+ mutex_lock(&hw->phy_mutex);
memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
memcpy_toio(hw->regs + B2_MAC_1 + port*8,
dev->dev_addr, ETH_ALEN);
@@ -2970,7 +2970,7 @@
gma_set_addr(hw, port, GM_SRC_ADDR_1L, dev->dev_addr);
gma_set_addr(hw, port, GM_SRC_ADDR_2L, dev->dev_addr);
}
- spin_unlock_bh(&hw->phy_lock);
+ mutex_unlock(&hw->phy_mutex);
return 0;
}
@@ -3150,14 +3150,14 @@
skge_write32(hw, B0_IMSK, hw->intr_mask);
- spin_lock_bh(&hw->phy_lock);
+ mutex_lock(&hw->phy_mutex);
for (i = 0; i < hw->ports; i++) {
if (hw->chip_id == CHIP_ID_GENESIS)
genesis_reset(hw, i);
else
yukon_reset(hw, i);
}
- spin_unlock_bh(&hw->phy_lock);
+ mutex_unlock(&hw->phy_mutex);
return 0;
}
@@ -3305,8 +3305,8 @@
}
hw->pdev = pdev;
- spin_lock_init(&hw->phy_lock);
- tasklet_init(&hw->ext_tasklet, skge_extirq, (unsigned long) hw);
+ mutex_init(&hw->phy_mutex);
+ INIT_WORK(&hw->phy_work, skge_extirq, hw);
hw->regs = ioremap_nocache(pci_resource_start(pdev, 0), 0x4000);
if (!hw->regs) {
@@ -3392,7 +3392,7 @@
skge_write16(hw, B0_LED, LED_STAT_OFF);
skge_write8(hw, B0_CTST, CS_RST_SET);
- tasklet_kill(&hw->ext_tasklet);
+ flush_scheduled_work();
free_irq(pdev->irq, hw);
pci_release_regions(pdev);
diff --git a/drivers/net/skge.h b/drivers/net/skge.h
index 1f1ce88..46bd950 100644
--- a/drivers/net/skge.h
+++ b/drivers/net/skge.h
@@ -2399,9 +2399,8 @@
u32 ram_size;
u32 ram_offset;
u16 phy_addr;
-
- struct tasklet_struct ext_tasklet;
- spinlock_t phy_lock;
+ struct work_struct phy_work;
+ struct mutex phy_mutex;
};
enum {