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-rw-r--r--drivers/net/sky2.c276
-rw-r--r--drivers/net/sky2.h15
2 files changed, 111 insertions, 180 deletions
diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c
index 3a6c796..41dbe58 100644
--- a/drivers/net/sky2.c
+++ b/drivers/net/sky2.c
@@ -500,9 +500,9 @@ static void sky2_phy_init(struct sky2_hw *hw, unsigned port)
/* Force a renegotiation */
static void sky2_phy_reinit(struct sky2_port *sky2)
{
- down(&sky2->phy_sema);
+ spin_lock_bh(&sky2->phy_lock);
sky2_phy_init(sky2->hw, sky2->port);
- up(&sky2->phy_sema);
+ spin_unlock_bh(&sky2->phy_lock);
}
static void sky2_mac_init(struct sky2_hw *hw, unsigned port)
@@ -567,9 +567,9 @@ static void sky2_mac_init(struct sky2_hw *hw, unsigned port)
sky2_read16(hw, SK_REG(port, GMAC_IRQ_SRC));
- down(&sky2->phy_sema);
+ spin_lock_bh(&sky2->phy_lock);
sky2_phy_init(hw, port);
- up(&sky2->phy_sema);
+ spin_unlock_bh(&sky2->phy_lock);
/* MIB clear */
reg = gma_read16(hw, port, GM_PHY_ADDR);
@@ -856,9 +856,9 @@ static int sky2_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
case SIOCGMIIREG: {
u16 val = 0;
- down(&sky2->phy_sema);
+ spin_lock_bh(&sky2->phy_lock);
err = __gm_phy_read(hw, sky2->port, data->reg_num & 0x1f, &val);
- up(&sky2->phy_sema);
+ spin_unlock_bh(&sky2->phy_lock);
data->val_out = val;
break;
@@ -868,10 +868,10 @@ static int sky2_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
if (!capable(CAP_NET_ADMIN))
return -EPERM;
- down(&sky2->phy_sema);
+ spin_lock_bh(&sky2->phy_lock);
err = gm_phy_write(hw, sky2->port, data->reg_num & 0x1f,
data->val_in);
- up(&sky2->phy_sema);
+ spin_unlock_bh(&sky2->phy_lock);
break;
}
return err;
@@ -983,7 +983,7 @@ static int sky2_up(struct net_device *dev)
struct sky2_port *sky2 = netdev_priv(dev);
struct sky2_hw *hw = sky2->hw;
unsigned port = sky2->port;
- u32 ramsize, rxspace;
+ u32 ramsize, rxspace, imask;
int err = -ENOMEM;
if (netif_msg_ifup(sky2))
@@ -1048,10 +1048,10 @@ static int sky2_up(struct net_device *dev)
goto err_out;
/* Enable interrupts from phy/mac for port */
- spin_lock_irq(&hw->hw_lock);
- hw->intr_mask |= (port == 0) ? Y2_IS_PORT_1 : Y2_IS_PORT_2;
- sky2_write32(hw, B0_IMSK, hw->intr_mask);
- spin_unlock_irq(&hw->hw_lock);
+ imask = sky2_read32(hw, B0_IMSK);
+ imask |= (port == 0) ? Y2_IS_PORT_1 : Y2_IS_PORT_2;
+ sky2_write32(hw, B0_IMSK, imask);
+
return 0;
err_out:
@@ -1343,6 +1343,7 @@ static int sky2_down(struct net_device *dev)
struct sky2_hw *hw = sky2->hw;
unsigned port = sky2->port;
u16 ctrl;
+ u32 imask;
/* Never really got started! */
if (!sky2->tx_le)
@@ -1354,14 +1355,6 @@ static int sky2_down(struct net_device *dev)
/* Stop more packets from being queued */
netif_stop_queue(dev);
- /* Disable port IRQ */
- spin_lock_irq(&hw->hw_lock);
- hw->intr_mask &= ~((sky2->port == 0) ? Y2_IS_IRQ_PHY1 : Y2_IS_IRQ_PHY2);
- sky2_write32(hw, B0_IMSK, hw->intr_mask);
- spin_unlock_irq(&hw->hw_lock);
-
- flush_scheduled_work();
-
sky2_phy_reset(hw, port);
/* Stop transmitter */
@@ -1405,6 +1398,11 @@ static int sky2_down(struct net_device *dev)
sky2_write8(hw, SK_REG(port, RX_GMF_CTRL_T), GMF_RST_SET);
sky2_write8(hw, SK_REG(port, TX_GMF_CTRL_T), GMF_RST_SET);
+ /* Disable port IRQ */
+ imask = sky2_read32(hw, B0_IMSK);
+ imask &= ~(sky2->port == 0) ? Y2_IS_PORT_1 : Y2_IS_PORT_2;
+ sky2_write32(hw, B0_IMSK, imask);
+
/* turn off LED's */
sky2_write16(hw, B0_Y2LED, LED_STAT_OFF);
@@ -1599,20 +1597,19 @@ static int sky2_autoneg_done(struct sky2_port *sky2, u16 aux)
return 0;
}
-/*
- * Interrupt from PHY are handled outside of interrupt context
- * because accessing phy registers requires spin wait which might
- * cause excess interrupt latency.
- */
-static void sky2_phy_task(void *arg)
+/* Interrupt from PHY */
+static void sky2_phy_intr(struct sky2_hw *hw, unsigned port)
{
- struct sky2_port *sky2 = arg;
- struct sky2_hw *hw = sky2->hw;
+ struct net_device *dev = hw->dev[port];
+ struct sky2_port *sky2 = netdev_priv(dev);
u16 istatus, phystat;
- down(&sky2->phy_sema);
- istatus = gm_phy_read(hw, sky2->port, PHY_MARV_INT_STAT);
- phystat = gm_phy_read(hw, sky2->port, PHY_MARV_PHY_STAT);
+ spin_lock(&sky2->phy_lock);
+ istatus = gm_phy_read(hw, port, PHY_MARV_INT_STAT);
+ phystat = gm_phy_read(hw, port, PHY_MARV_PHY_STAT);
+
+ if (!netif_running(dev))
+ goto out;
if (netif_msg_intr(sky2))
printk(KERN_INFO PFX "%s: phy interrupt status 0x%x 0x%x\n",
@@ -1638,12 +1635,7 @@ static void sky2_phy_task(void *arg)
sky2_link_down(sky2);
}
out:
- up(&sky2->phy_sema);
-
- spin_lock_irq(&hw->hw_lock);
- hw->intr_mask |= (sky2->port == 0) ? Y2_IS_IRQ_PHY1 : Y2_IS_IRQ_PHY2;
- sky2_write32(hw, B0_IMSK, hw->intr_mask);
- spin_unlock_irq(&hw->hw_lock);
+ spin_unlock(&sky2->phy_lock);
}
@@ -1655,20 +1647,6 @@ static void sky2_tx_timeout(struct net_device *dev)
struct sky2_port *sky2 = netdev_priv(dev);
struct sky2_hw *hw = sky2->hw;
unsigned txq = txqaddr[sky2->port];
- u16 ridx;
-
- /* Maybe we just missed an status interrupt */
- spin_lock(&sky2->tx_lock);
- ridx = sky2_read16(hw,
- sky2->port == 0 ? STAT_TXA1_RIDX : STAT_TXA2_RIDX);
- sky2_tx_complete(sky2, ridx);
- spin_unlock(&sky2->tx_lock);
-
- if (!netif_queue_stopped(dev)) {
- if (net_ratelimit())
- pr_info(PFX "transmit interrupt missed? recovered\n");
- return;
- }
if (netif_msg_timer(sky2))
printk(KERN_ERR PFX "%s: tx timeout\n", dev->name);
@@ -1698,6 +1676,7 @@ static int sky2_change_mtu(struct net_device *dev, int new_mtu)
struct sky2_hw *hw = sky2->hw;
int err;
u16 ctl, mode;
+ u32 imask;
if (new_mtu < ETH_ZLEN || new_mtu > ETH_JUMBO_MTU)
return -EINVAL;
@@ -1710,12 +1689,15 @@ static int sky2_change_mtu(struct net_device *dev, int new_mtu)
return 0;
}
+ imask = sky2_read32(hw, B0_IMSK);
sky2_write32(hw, B0_IMSK, 0);
dev->trans_start = jiffies; /* prevent tx timeout */
netif_stop_queue(dev);
netif_poll_disable(hw->dev[0]);
+ synchronize_irq(hw->pdev->irq);
+
ctl = gma_read16(hw, sky2->port, GM_GP_CTRL);
gma_write16(hw, sky2->port, GM_GP_CTRL, ctl & ~GM_GPCR_RX_ENA);
sky2_rx_stop(sky2);
@@ -1734,7 +1716,7 @@ static int sky2_change_mtu(struct net_device *dev, int new_mtu)
sky2_write8(hw, RB_ADDR(rxqaddr[sky2->port], RB_CTRL), RB_ENA_OP_MD);
err = sky2_rx_start(sky2);
- sky2_write32(hw, B0_IMSK, hw->intr_mask);
+ sky2_write32(hw, B0_IMSK, imask);
if (err)
dev_close(dev);
@@ -1838,76 +1820,51 @@ error:
goto resubmit;
}
-/*
- * Check for transmit complete
- */
-#define TX_NO_STATUS 0xffff
-
-static void sky2_tx_check(struct sky2_hw *hw, int port, u16 last)
+/* Transmit complete */
+static inline void sky2_tx_done(struct net_device *dev, u16 last)
{
- if (last != TX_NO_STATUS) {
- struct net_device *dev = hw->dev[port];
- if (dev && netif_running(dev)) {
- struct sky2_port *sky2 = netdev_priv(dev);
+ struct sky2_port *sky2 = netdev_priv(dev);
- spin_lock(&sky2->tx_lock);
- sky2_tx_complete(sky2, last);
- spin_unlock(&sky2->tx_lock);
- }
+ if (netif_running(dev)) {
+ spin_lock(&sky2->tx_lock);
+ sky2_tx_complete(sky2, last);
+ spin_unlock(&sky2->tx_lock);
}
}
-/*
- * Both ports share the same status interrupt, therefore there is only
- * one poll routine.
- */
-static int sky2_poll(struct net_device *dev0, int *budget)
+/* Process status response ring */
+static int sky2_status_intr(struct sky2_hw *hw, int to_do)
{
- struct sky2_hw *hw = ((struct sky2_port *) netdev_priv(dev0))->hw;
- unsigned int to_do = min(dev0->quota, *budget);
- unsigned int work_done = 0;
- u16 hwidx;
- u16 tx_done[2] = { TX_NO_STATUS, TX_NO_STATUS };
-
- sky2_write32(hw, STAT_CTRL, SC_STAT_CLR_IRQ);
-
- /*
- * Kick the STAT_LEV_TIMER_CTRL timer.
- * This fixes my hangs on Yukon-EC (0xb6) rev 1.
- * The if clause is there to start the timer only if it has been
- * configured correctly and not been disabled via ethtool.
- */
- if (sky2_read8(hw, STAT_LEV_TIMER_CTRL) == TIM_START) {
- sky2_write8(hw, STAT_LEV_TIMER_CTRL, TIM_STOP);
- sky2_write8(hw, STAT_LEV_TIMER_CTRL, TIM_START);
- }
+ int work_done = 0;
- hwidx = sky2_read16(hw, STAT_PUT_IDX);
- BUG_ON(hwidx >= STATUS_RING_SIZE);
rmb();
- while (hwidx != hw->st_idx) {
+ for(;;) {
struct sky2_status_le *le = hw->st_le + hw->st_idx;
struct net_device *dev;
struct sky2_port *sky2;
struct sk_buff *skb;
u32 status;
u16 length;
+ u8 link, opcode;
+
+ opcode = le->opcode;
+ if (!opcode)
+ break;
+ opcode &= ~HW_OWNER;
- le = hw->st_le + hw->st_idx;
hw->st_idx = (hw->st_idx + 1) % STATUS_RING_SIZE;
- prefetch(hw->st_le + hw->st_idx);
+ le->opcode = 0;
- BUG_ON(le->link >= 2);
- dev = hw->dev[le->link];
- if (dev == NULL || !netif_running(dev))
- continue;
+ link = le->link;
+ BUG_ON(link >= 2);
+ dev = hw->dev[link];
sky2 = netdev_priv(dev);
- status = le32_to_cpu(le->status);
- length = le16_to_cpu(le->length);
+ length = le->length;
+ status = le->status;
- switch (le->opcode & ~HW_OWNER) {
+ switch (opcode) {
case OP_RXSTAT:
skb = sky2_receive(sky2, length, status);
if (!skb)
@@ -1947,42 +1904,23 @@ static int sky2_poll(struct net_device *dev0, int *budget)
case OP_TXINDEXLE:
/* TX index reports status for both ports */
- tx_done[0] = status & 0xffff;
- tx_done[1] = ((status >> 24) & 0xff)
- | (u16)(length & 0xf) << 8;
+ sky2_tx_done(hw->dev[0], status & 0xffff);
+ if (hw->dev[1])
+ sky2_tx_done(hw->dev[1],
+ ((status >> 24) & 0xff)
+ | (u16)(length & 0xf) << 8);
break;
default:
if (net_ratelimit())
printk(KERN_WARNING PFX
- "unknown status opcode 0x%x\n", le->opcode);
+ "unknown status opcode 0x%x\n", opcode);
break;
}
}
exit_loop:
- sky2_tx_check(hw, 0, tx_done[0]);
- sky2_tx_check(hw, 1, tx_done[1]);
-
- if (sky2_read8(hw, STAT_TX_TIMER_CTRL) == TIM_START) {
- sky2_write8(hw, STAT_TX_TIMER_CTRL, TIM_STOP);
- sky2_write8(hw, STAT_TX_TIMER_CTRL, TIM_START);
- }
-
- if (likely(work_done < to_do)) {
- spin_lock_irq(&hw->hw_lock);
- __netif_rx_complete(dev0);
-
- hw->intr_mask |= Y2_IS_STAT_BMU;
- sky2_write32(hw, B0_IMSK, hw->intr_mask);
- spin_unlock_irq(&hw->hw_lock);
-
- return 0;
- } else {
- *budget -= work_done;
- dev0->quota -= work_done;
- return 1;
- }
+ return work_done;
}
static void sky2_hw_error(struct sky2_hw *hw, unsigned port, u32 status)
@@ -2101,42 +2039,17 @@ static void sky2_mac_intr(struct sky2_hw *hw, unsigned port)
}
}
-static void sky2_phy_intr(struct sky2_hw *hw, unsigned port)
-{
- struct net_device *dev = hw->dev[port];
- struct sky2_port *sky2 = netdev_priv(dev);
-
- hw->intr_mask &= ~(port == 0 ? Y2_IS_IRQ_PHY1 : Y2_IS_IRQ_PHY2);
- sky2_write32(hw, B0_IMSK, hw->intr_mask);
-
- schedule_work(&sky2->phy_task);
-}
-static irqreturn_t sky2_intr(int irq, void *dev_id, struct pt_regs *regs)
+static int sky2_poll(struct net_device *dev0, int *budget)
{
- struct sky2_hw *hw = dev_id;
- struct net_device *dev0 = hw->dev[0];
- u32 status;
-
- status = sky2_read32(hw, B0_Y2_SP_ISRC2);
- if (status == 0 || status == ~0)
- return IRQ_NONE;
+ struct sky2_hw *hw = ((struct sky2_port *) netdev_priv(dev0))->hw;
+ int work_limit = min(dev0->quota, *budget);
+ int work_done = 0;
+ u32 status = sky2_read32(hw, B0_ISRC);
- spin_lock(&hw->hw_lock);
if (status & Y2_IS_HW_ERR)
sky2_hw_intr(hw);
- /* Do NAPI for Rx and Tx status */
- if (status & Y2_IS_STAT_BMU) {
- hw->intr_mask &= ~Y2_IS_STAT_BMU;
- sky2_write32(hw, B0_IMSK, hw->intr_mask);
-
- if (likely(__netif_rx_schedule_prep(dev0))) {
- prefetch(&hw->st_le[hw->st_idx]);
- __netif_rx_schedule(dev0);
- }
- }
-
if (status & Y2_IS_IRQ_PHY1)
sky2_phy_intr(hw, 0);
@@ -2149,9 +2062,38 @@ static irqreturn_t sky2_intr(int irq, void *dev_id, struct pt_regs *regs)
if (status & Y2_IS_IRQ_MAC2)
sky2_mac_intr(hw, 1);
+ if (status & Y2_IS_STAT_BMU) {
+ work_done = sky2_status_intr(hw, work_limit);
+ *budget -= work_done;
+ dev0->quota -= work_done;
+
+ if (work_done >= work_limit)
+ return 1;
+
+ sky2_write32(hw, STAT_CTRL, SC_STAT_CLR_IRQ);
+ }
+
+ netif_rx_complete(dev0);
+
+ /* Ack interrupt and re-enable */
sky2_write32(hw, B0_Y2_SP_ICR, 2);
+ return 0;
+}
+
+static irqreturn_t sky2_intr(int irq, void *dev_id, struct pt_regs *regs)
+{
+ struct sky2_hw *hw = dev_id;
+ struct net_device *dev0 = hw->dev[0];
+ u32 status;
+
+ /* Reading this mask interrupts as side effect */
+ status = sky2_read32(hw, B0_Y2_SP_ISRC2);
+ if (status == 0 || status == ~0)
+ return IRQ_NONE;
- spin_unlock(&hw->hw_lock);
+ prefetch(&hw->st_le[hw->st_idx]);
+ if (likely(__netif_rx_schedule_prep(dev0)))
+ __netif_rx_schedule(dev0);
return IRQ_HANDLED;
}
@@ -2320,7 +2262,6 @@ static int sky2_reset(struct sky2_hw *hw)
/* Set the list last index */
sky2_write16(hw, STAT_LAST_IDX, STATUS_RING_SIZE - 1);
- /* These status setup values are copied from SysKonnect's driver */
sky2_write16(hw, STAT_TX_IDX_TH, 10);
sky2_write8(hw, STAT_FIFO_WM, 16);
@@ -2714,7 +2655,7 @@ static int sky2_phys_id(struct net_device *dev, u32 data)
ms = data * 1000;
/* save initial values */
- down(&sky2->phy_sema);
+ spin_lock_bh(&sky2->phy_lock);
if (hw->chip_id == CHIP_ID_YUKON_XL) {
u16 pg = gm_phy_read(hw, port, PHY_MARV_EXT_ADR);
gm_phy_write(hw, port, PHY_MARV_EXT_ADR, 3);
@@ -2730,9 +2671,9 @@ static int sky2_phys_id(struct net_device *dev, u32 data)
sky2_led(hw, port, onoff);
onoff = !onoff;
- up(&sky2->phy_sema);
+ spin_unlock_bh(&sky2->phy_lock);
interrupted = msleep_interruptible(250);
- down(&sky2->phy_sema);
+ spin_lock_bh(&sky2->phy_lock);
ms -= 250;
}
@@ -2747,7 +2688,7 @@ static int sky2_phys_id(struct net_device *dev, u32 data)
gm_phy_write(hw, port, PHY_MARV_LED_CTRL, ledctrl);
gm_phy_write(hw, port, PHY_MARV_LED_OVER, ledover);
}
- up(&sky2->phy_sema);
+ spin_unlock_bh(&sky2->phy_lock);
return 0;
}
@@ -3023,8 +2964,7 @@ static __devinit struct net_device *sky2_init_netdev(struct sky2_hw *hw,
*/
sky2->rx_csum = (hw->chip_id != CHIP_ID_YUKON_XL);
- INIT_WORK(&sky2->phy_task, sky2_phy_task, sky2);
- init_MUTEX(&sky2->phy_sema);
+ spin_lock_init(&sky2->phy_lock);
sky2->tx_pending = TX_DEF_PENDING;
sky2->rx_pending = RX_DEF_PENDING;
sky2->rx_bufsize = sky2_buf_size(ETH_DATA_LEN);
@@ -3136,7 +3076,6 @@ static int __devinit sky2_probe(struct pci_dev *pdev,
goto err_out_free_hw;
}
hw->pm_cap = pm_cap;
- spin_lock_init(&hw->hw_lock);
#ifdef __BIG_ENDIAN
/* byte swap descriptors in hardware */
@@ -3196,8 +3135,7 @@ static int __devinit sky2_probe(struct pci_dev *pdev,
goto err_out_unregister;
}
- hw->intr_mask = Y2_IS_BASE;
- sky2_write32(hw, B0_IMSK, hw->intr_mask);
+ sky2_write32(hw, B0_IMSK, Y2_IS_BASE);
pci_set_drvdata(pdev, hw);
diff --git a/drivers/net/sky2.h b/drivers/net/sky2.h
index 2a23f3a..db362b6 100644
--- a/drivers/net/sky2.h
+++ b/drivers/net/sky2.h
@@ -278,13 +278,9 @@ enum {
Y2_IS_CHK_TXS1 = 1<<1, /* Descriptor error TXS 1 */
Y2_IS_CHK_TXA1 = 1<<0, /* Descriptor error TXA 1 */
- Y2_IS_BASE = Y2_IS_HW_ERR | Y2_IS_STAT_BMU |
- Y2_IS_POLL_CHK | Y2_IS_TWSI_RDY |
- Y2_IS_IRQ_SW | Y2_IS_TIMINT,
- Y2_IS_PORT_1 = Y2_IS_IRQ_PHY1 | Y2_IS_IRQ_MAC1 |
- Y2_IS_CHK_RX1 | Y2_IS_CHK_TXA1 | Y2_IS_CHK_TXS1,
- Y2_IS_PORT_2 = Y2_IS_IRQ_PHY2 | Y2_IS_IRQ_MAC2 |
- Y2_IS_CHK_RX2 | Y2_IS_CHK_TXA2 | Y2_IS_CHK_TXS2,
+ Y2_IS_BASE = Y2_IS_HW_ERR | Y2_IS_STAT_BMU,
+ Y2_IS_PORT_1 = Y2_IS_IRQ_PHY1 | Y2_IS_IRQ_MAC1,
+ Y2_IS_PORT_2 = Y2_IS_IRQ_PHY2 | Y2_IS_IRQ_MAC2,
};
/* B2_IRQM_HWE_MSK 32 bit IRQ Moderation HW Error Mask */
@@ -1832,6 +1828,7 @@ struct sky2_port {
struct net_device *netdev;
unsigned port;
u32 msg_enable;
+ spinlock_t phy_lock;
spinlock_t tx_lock ____cacheline_aligned_in_smp;
struct tx_ring_info *tx_ring;
@@ -1866,16 +1863,12 @@ struct sky2_port {
struct net_device_stats net_stats;
- struct work_struct phy_task;
- struct semaphore phy_sema;
};
struct sky2_hw {
void __iomem *regs;
struct pci_dev *pdev;
struct net_device *dev[2];
- spinlock_t hw_lock;
- u32 intr_mask;
int pm_cap;
u8 chip_id;
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