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Subject[PATCH] winbond-840 update
Minor update to the winbond-840 driver:

* improved SMP locking, one or 2 races fixed.
* memory leak in _close fixed.
* partial implementation of _suspend and _resume. The chip is disabled
and restarted, but not yet put into sleep mode. [lack of hardware to
test it]

--
Manfred--- 2.4/drivers/net/winbond-840.c Fri Apr 20 20:54:23 2001
+++ build-2.4/drivers/net/winbond-840.c Sat May 19 14:14:22 2001
@@ -32,10 +32,16 @@
synchronize tx_q_bytes
software reset in tx_timeout
Copyright (C) 2000 Manfred Spraul
+ * further cleanups
+ power management.
+ Copyright (c) 2001 Manfred Spraul

TODO:
* according to the documentation, the chip supports big endian
descriptors. Remove cpu_to_le32, enable BE descriptors.
+ * figure out why FreeBSD doesn't need the FIFO workaround
+ * Implement the HasACPI block
+ * Wake-On-LAN
*/

/* Automatically extracted configuration info:
@@ -122,13 +128,14 @@
#include <linux/skbuff.h>
#include <linux/init.h>
#include <linux/delay.h>
+#include <linux/rtnetlink.h>
#include <asm/processor.h> /* Processor type for cache alignment. */
#include <asm/bitops.h>
#include <asm/io.h>

/* These identify the driver base version and may not be removed. */
static char version[] __devinitdata =
-KERN_INFO "winbond-840.c:v1.01 (2.4 port) 5/15/2000 Donald Becker <becker@scyld.com>\n"
+KERN_INFO "winbond-840.c:v1.01.m2 5/15/2000 Donald Becker <becker@scyld.com>\n"
KERN_INFO " http://www.scyld.com/network/drivers.html\n";

MODULE_AUTHOR("Donald Becker <becker@scyld.com>");
@@ -198,7 +205,7 @@
PCI_ADDR_64BITS=0x100, PCI_NO_ACPI_WAKE=0x200, PCI_NO_MIN_LATENCY=0x400,
};
enum chip_capability_flags {
- CanHaveMII=1, HasBrokenTx=2, AlwaysFDX=4, FDXOnNoMII=8,};
+ CanHaveMII=1, HasBrokenTx=2, AlwaysFDX=4, FDXOnNoMII=8,HasACPI=16};
#ifdef USE_IO_OPS
#define W840_FLAGS (PCI_USES_IO | PCI_ADDR0 | PCI_USES_MASTER)
#else
@@ -302,7 +309,7 @@
struct w840_tx_desc {
s32 status;
s32 length;
- u32 buffer1, buffer2; /* We use only buffer 1. */
+ u32 buffer1, buffer2;
};

/* Bits in network_desc.status */
@@ -340,8 +347,7 @@
/* These values are keep track of the transceiver/media in use. */
unsigned int full_duplex:1; /* Full-duplex operation requested. */
unsigned int duplex_lock:1;
- unsigned int medialock:1; /* Do not sense media. */
- unsigned int default_port:4; /* Last dev->if_port value. */
+ int dev_suspended;
/* MII transceiver section. */
int mii_cnt; /* MII device addresses. */
u16 advertising; /* NWay media advertisement */
@@ -352,13 +358,14 @@
static int mdio_read(struct net_device *dev, int phy_id, int location);
static void mdio_write(struct net_device *dev, int phy_id, int location, int value);
static int netdev_open(struct net_device *dev);
-static void check_duplex(struct net_device *dev);
+static int update_link(struct net_device *dev);
static void netdev_timer(unsigned long data);
static void init_rxtx_rings(struct net_device *dev);
static void free_rxtx_rings(struct netdev_private *np);
static void init_registers(struct net_device *dev);
static void tx_timeout(struct net_device *dev);
-static int alloc_ring(struct net_device *dev);
+static int alloc_ringdesc(struct net_device *dev);
+static void free_ringdesc(struct netdev_private *np);
static int start_tx(struct sk_buff *skb, struct net_device *dev);
static void intr_handler(int irq, void *dev_instance, struct pt_regs *regs);
static void netdev_error(struct net_device *dev, int intr_status);
@@ -427,6 +434,7 @@
np->chip_id = chip_idx;
np->drv_flags = pci_id_tbl[chip_idx].drv_flags;
spin_lock_init(&np->lock);
+ np->dev_suspended = 0;

pci_set_drvdata(pdev, dev);

@@ -437,9 +445,9 @@
if (option > 0) {
if (option & 0x200)
np->full_duplex = 1;
- np->default_port = option & 15;
- if (np->default_port)
- np->medialock = 1;
+ if (option & 15)
+ printk(KERN_INFO "%s: ignoring user supplied media type %d",
+ dev->name, option & 15);
}
if (find_cnt < MAX_UNITS && full_duplex[find_cnt] > 0)
np->full_duplex = 1;
@@ -667,7 +675,7 @@
printk(KERN_DEBUG "%s: w89c840_open() irq %d.\n",
dev->name, dev->irq);

- if((i=alloc_ring(dev)))
+ if((i=alloc_ringdesc(dev)))
return i;

init_registers(dev);
@@ -678,7 +686,7 @@

/* Set the timer to check for link beat. */
init_timer(&np->timer);
- np->timer.expires = jiffies + 3*HZ;
+ np->timer.expires = jiffies + 1*HZ;
np->timer.data = (unsigned long)dev;
np->timer.function = &netdev_timer; /* timer handler */
add_timer(&np->timer);
@@ -686,25 +694,88 @@
return 0;
}

-static void check_duplex(struct net_device *dev)
+static int update_link(struct net_device *dev)
{
struct netdev_private *np = dev->priv;
- int mii_reg5 = mdio_read(dev, np->phys[0], 5);
- int negotiated = mii_reg5 & np->advertising;
- int duplex;
+ int negotiated, duplex, fasteth, result, mii_reg;

- if (np->duplex_lock || mii_reg5 == 0xffff)
+ /* BSMR */
+ mii_reg = mdio_read(dev, np->phys[0], 1);
+
+ if (mii_reg == 0xffff)
+ return np->csr6;
+ /* reread: the link status bit is sticky */
+ mii_reg = mdio_read(dev, np->phys[0], 1);
+
+ if (!mii_reg & 0x4) {
+ if (netif_carrier_ok(dev)) {
+ printk(KERN_INFO "%s: MII #%d reports no link. Disabling watchdog.\n",
+ dev->name, np->phys[0]);
+ netif_carrier_off(dev);
+ }
+ return np->csr6;
+ }
+ if (!netif_carrier_ok(dev)) {
+ printk(KERN_INFO "%s: MII #%d link is back. Enabling watchdog.\n",
+ dev->name, np->phys[0]);
+ netif_carrier_on(dev);
+ }
+
+ mii_reg = mdio_read(dev, np->phys[0], 5);
+ negotiated = mii_reg & np->advertising;
+
+ /* remove fastether and fullduplex */
+ result = np->csr6 & ~0x20000200;
+
+ duplex = np->duplex_lock || (negotiated & 0x0100) || ((negotiated & 0x02C0) == 0x0040);
+ if (duplex)
+ result |= 0x200;
+
+ fasteth = negotiated & 0x380;
+ if (fasteth)
+ result |= 0x20000000;
+ if (result != np->csr6 && debug)
+ printk(KERN_INFO "%s: Setting %s-duplex based on MII #%d "
+ "negotiated capability %4.4x.\n", dev->name,
+ duplex ? "full" : "half", np->phys[0], negotiated);
+ return result;
+}
+
+#define RXTX_TIMEOUT 2000
+static inline void update_csr6(struct net_device *dev, int new)
+{
+ struct netdev_private *np = dev->priv;
+ long ioaddr = dev->base_addr;
+ int limit = RXTX_TIMEOUT;
+
+ if (new==np->csr6)
return;
- duplex = (negotiated & 0x0100) || (negotiated & 0x01C0) == 0x0040;
- if (np->full_duplex != duplex) {
- np->full_duplex = duplex;
- if (debug)
- printk(KERN_INFO "%s: Setting %s-duplex based on MII #%d "
- "negotiated capability %4.4x.\n", dev->name,
- duplex ? "full" : "half", np->phys[0], negotiated);
- np->csr6 &= ~0x200;
- np->csr6 |= duplex ? 0x200 : 0;
+ /* stop both Tx and Rx processes */
+ writel(np->csr6 & ~0x2002, ioaddr + NetworkConfig);
+ /* wait until they have really stopped */
+ for (;;) {
+ int csr5 = readl(ioaddr + IntrStatus);
+ int t;
+
+ t = (csr5 >> 17) & 0x07;
+ if (t==0||t==1) {
+ /* rx stopped */
+ t = (csr5 >> 20) & 0x07;
+ if (t==0||t==1)
+ break;
+ }
+
+ limit--;
+ if(!limit) {
+ printk(KERN_INFO "%s: couldn't stop rxtx, IntrStatus %xh.\n",
+ dev->name, csr5);
+ break;
+ }
+ udelay(1);
}
+ np->csr6 = new;
+ /* and restart them with the new configuration */
+ writel(np->csr6, ioaddr + NetworkConfig);
}

static void netdev_timer(unsigned long data)
@@ -712,8 +783,6 @@
struct net_device *dev = (struct net_device *)data;
struct netdev_private *np = dev->priv;
long ioaddr = dev->base_addr;
- int next_tick = 10*HZ;
- int old_csr6 = np->csr6;

if (debug > 2)
printk(KERN_DEBUG "%s: Media selection timer tick, status %8.8x "
@@ -721,13 +790,9 @@
dev->name, (int)readl(ioaddr + IntrStatus),
(int)readl(ioaddr + NetworkConfig));
spin_lock_irq(&np->lock);
- check_duplex(dev);
- if (np->csr6 != old_csr6) {
- writel(np->csr6 & ~0x0002, ioaddr + NetworkConfig);
- writel(np->csr6 | 0x2002, ioaddr + NetworkConfig);
- }
+ update_csr6(dev, update_link(dev));
spin_unlock_irq(&np->lock);
- np->timer.expires = jiffies + next_tick;
+ np->timer.expires = jiffies + 10*HZ;
add_timer(&np->timer);
}

@@ -847,19 +912,20 @@
#warning Processor architecture undefined!
#endif

- if (dev->if_port == 0)
- dev->if_port = np->default_port;
-
- /* Fast Ethernet; 128 byte Tx threshold;
+ /* 128 byte Tx threshold;
Transmit on; Receive on; */
- np->csr6 = 0x20022002;
- check_duplex(dev);
- set_rx_mode(dev);
- writel(0, ioaddr + RxStartDemand);
+ np->csr6 = 0x00022002;
+ update_link(dev);

/* Clear and Enable interrupts by setting the interrupt mask. */
+ /* But defer interrupt processing until everything is set up */
+ disable_irq(dev->irq);
writel(0x1A0F5, ioaddr + IntrStatus);
writel(0x1A0F5, ioaddr + IntrEnable);
+ set_rx_mode(dev);
+
+ enable_irq(dev->irq);
+ writel(0, ioaddr + RxStartDemand);

}

@@ -887,31 +953,36 @@
printk(KERN_DEBUG "Tx Descriptor addr %xh.\n",readl(ioaddr+0x4C));

#endif
- spin_lock_irq(&np->lock);
/*
* Under high load dirty_tx and the internal tx descriptor pointer
* come out of sync, thus perform a software reset and reinitialize
* everything.
*/
+ disable_irq(dev->irq);
+ del_timer_sync(&np->timer);
+ spin_lock(&np->lock);

writel(1, dev->base_addr+PCIBusCfg);
+ readl(dev->base_addr+PCIBusCfg);
udelay(1);

free_rxtx_rings(np);
init_rxtx_rings(dev);
init_registers(dev);
- set_rx_mode(dev);

- spin_unlock_irq(&np->lock);
+ spin_unlock(&np->lock);
+ enable_irq(dev->irq);

netif_wake_queue(dev);
dev->trans_start = jiffies;
np->stats.tx_errors++;
- return;
+
+ np->timer.expires = jiffies + 1*HZ;
+ add_timer(&np->timer);
}

/* Initialize the Rx and Tx rings, along with various 'dev' bits. */
-static int alloc_ring(struct net_device *dev)
+static int alloc_ringdesc(struct net_device *dev)
{
struct netdev_private *np = dev->priv;

@@ -927,6 +998,14 @@
return 0;
}

+static void free_ringdesc(struct netdev_private *np)
+{
+ pci_free_consistent(np->pci_dev,
+ sizeof(struct w840_rx_desc)*RX_RING_SIZE +
+ sizeof(struct w840_tx_desc)*TX_RING_SIZE,
+ np->rx_ring, np->ring_dma_addr);
+
+}

static int start_tx(struct sk_buff *skb, struct net_device *dev)
{
@@ -958,9 +1037,9 @@

/* The spinlock protects against 2 races:
* - tx_q_bytes is updated by this function and intr_handler
- * - our hardware is extremely fast and finishes the packet between
- * our check for "queue full" and netif_stop_queue.
- * Thus setting DescOwn and netif_stop_queue must be atomic.
+ * - netdev_tx_done() could run immediately after setting DescOwn.
+ * If setting DescOwn and netif_stop_queue() is not atomic, we can
+ * lock up.
*/
spin_lock_irq(&np->lock);

@@ -990,6 +1069,61 @@
return 0;
}

+static void netdev_tx_done(struct net_device *dev)
+{
+ struct netdev_private *np = dev->priv;
+ for (; np->cur_tx - np->dirty_tx > 0; np->dirty_tx++) {
+ int entry = np->dirty_tx % TX_RING_SIZE;
+ int tx_status = le32_to_cpu(np->tx_ring[entry].status);
+
+ if (tx_status < 0)
+ break;
+ if (tx_status & 0x8000) { /* There was an error, log it. */
+#ifndef final_version
+ if (debug > 1)
+ printk(KERN_DEBUG "%s: Transmit error, Tx status %8.8x.\n",
+ dev->name, tx_status);
+#endif
+ np->stats.tx_errors++;
+ if (tx_status & 0x0104) np->stats.tx_aborted_errors++;
+ if (tx_status & 0x0C80) np->stats.tx_carrier_errors++;
+ if (tx_status & 0x0200) np->stats.tx_window_errors++;
+ if (tx_status & 0x0002) np->stats.tx_fifo_errors++;
+ if ((tx_status & 0x0080) && np->full_duplex == 0)
+ np->stats.tx_heartbeat_errors++;
+#ifdef ETHER_STATS
+ if (tx_status & 0x0100) np->stats.collisions16++;
+#endif
+ } else {
+#ifdef ETHER_STATS
+ if (tx_status & 0x0001) np->stats.tx_deferred++;
+#endif
+#ifndef final_version
+ if (debug > 3)
+ printk(KERN_DEBUG "%s: Transmit slot %d ok, Tx status %8.8x.\n",
+ dev->name, entry, tx_status);
+#endif
+ np->stats.tx_bytes += np->tx_skbuff[entry]->len;
+ np->stats.collisions += (tx_status >> 3) & 15;
+ np->stats.tx_packets++;
+ }
+ /* Free the original skb. */
+ pci_unmap_single(np->pci_dev,np->tx_addr[entry],
+ np->tx_skbuff[entry]->len,
+ PCI_DMA_TODEVICE);
+ np->tx_q_bytes -= np->tx_skbuff[entry]->len;
+ dev_kfree_skb_irq(np->tx_skbuff[entry]);
+ np->tx_skbuff[entry] = 0;
+ }
+ if (np->tx_full &&
+ np->cur_tx - np->dirty_tx < TX_QUEUE_LEN - 4
+ && np->tx_q_bytes < TX_BUG_FIFO_LIMIT) {
+ /* The ring is no longer full, clear tbusy. */
+ np->tx_full = 0;
+ netif_wake_queue(dev);
+ }
+}
+
/* The interrupt handler does all of the Rx thread work and cleans up
after the Tx thread. */
static void intr_handler(int irq, void *dev_instance, struct pt_regs *rgs)
@@ -999,8 +1133,8 @@
long ioaddr = dev->base_addr;
int work_limit = max_interrupt_work;

- spin_lock(&np->lock);
-
+ if (np->dev_suspended)
+ return;
do {
u32 intr_status = readl(ioaddr + IntrStatus);

@@ -1016,51 +1150,14 @@

if (intr_status & (IntrRxDone | RxNoBuf))
netdev_rx(dev);
+ if (intr_status & RxNoBuf)
+ writel(0, ioaddr + RxStartDemand);

- for (; np->cur_tx - np->dirty_tx > 0; np->dirty_tx++) {
- int entry = np->dirty_tx % TX_RING_SIZE;
- int tx_status = le32_to_cpu(np->tx_ring[entry].status);
-
- if (tx_status < 0)
- break;
- if (tx_status & 0x8000) { /* There was an error, log it. */
-#ifndef final_version
- if (debug > 1)
- printk(KERN_DEBUG "%s: Transmit error, Tx status %8.8x.\n",
- dev->name, tx_status);
-#endif
- np->stats.tx_errors++;
- if (tx_status & 0x0104) np->stats.tx_aborted_errors++;
- if (tx_status & 0x0C80) np->stats.tx_carrier_errors++;
- if (tx_status & 0x0200) np->stats.tx_window_errors++;
- if (tx_status & 0x0002) np->stats.tx_fifo_errors++;
- if ((tx_status & 0x0080) && np->full_duplex == 0)
- np->stats.tx_heartbeat_errors++;
-#ifdef ETHER_STATS
- if (tx_status & 0x0100) np->stats.collisions16++;
-#endif
- } else {
-#ifdef ETHER_STATS
- if (tx_status & 0x0001) np->stats.tx_deferred++;
-#endif
- np->stats.tx_bytes += np->tx_skbuff[entry]->len;
- np->stats.collisions += (tx_status >> 3) & 15;
- np->stats.tx_packets++;
- }
- /* Free the original skb. */
- pci_unmap_single(np->pci_dev,np->tx_addr[entry],
- np->tx_skbuff[entry]->len,
- PCI_DMA_TODEVICE);
- np->tx_q_bytes -= np->tx_skbuff[entry]->len;
- dev_kfree_skb_irq(np->tx_skbuff[entry]);
- np->tx_skbuff[entry] = 0;
- }
- if (np->tx_full &&
- np->cur_tx - np->dirty_tx < TX_QUEUE_LEN - 4
- && np->tx_q_bytes < TX_BUG_FIFO_LIMIT) {
- /* The ring is no longer full, clear tbusy. */
- np->tx_full = 0;
- netif_wake_queue(dev);
+ if (intr_status & (TxIdle | IntrTxDone) &&
+ np->cur_tx != np->dirty_tx) {
+ spin_lock(&np->lock);
+ netdev_tx_done(dev);
+ spin_unlock(&np->lock);
}

/* Abnormal error summary/uncommon events handlers. */
@@ -1073,8 +1170,12 @@
"status=0x%4.4x.\n", dev->name, intr_status);
/* Set the timer to re-enable the other interrupts after
10*82usec ticks. */
- writel(AbnormalIntr | TimerInt, ioaddr + IntrEnable);
- writel(10, ioaddr + GPTimer);
+ spin_lock(&np->lock);
+ if (!np->dev_suspended) {
+ writel(AbnormalIntr | TimerInt, ioaddr + IntrEnable);
+ writel(10, ioaddr + GPTimer);
+ }
+ spin_unlock(&np->lock);
break;
}
} while (1);
@@ -1082,8 +1183,6 @@
if (debug > 3)
printk(KERN_DEBUG "%s: exiting interrupt, status=%#4.4x.\n",
dev->name, (int)readl(ioaddr + IntrStatus));
-
- spin_unlock(&np->lock);
}

/* This routine is logically part of the interrupt handler, but separated
@@ -1218,31 +1317,36 @@
if (intr_status == 0xffffffff)
return;
if (intr_status & TxFIFOUnderflow) {
+ int new;
/* Bump up the Tx threshold */
+ spin_lock(&np->lock);
#if 0
/* This causes lots of dropped packets,
* and under high load even tx_timeouts
*/
- np->csr6 += 0x4000;
+ new = np->csr6 + 0x4000;
#else
- int cur = (np->csr6 >> 14)&0x7f;
- if (cur < 64)
- cur *= 2;
+ new = (np->csr6 >> 14)&0x7f;
+ if (new < 64)
+ new *= 2;
else
- cur = 0; /* load full packet before starting */
- np->csr6 &= ~(0x7F << 14);
- np->csr6 |= cur<<14;
+ new = 0; /* load full packet before starting */
+ new = (np->csr6 & ~(0x7F << 14)) | (new<<14);
#endif
- printk(KERN_DEBUG "%s: Tx underflow, increasing threshold to %8.8x.\n",
- dev->name, np->csr6);
- writel(np->csr6, ioaddr + NetworkConfig);
+ printk(KERN_DEBUG "%s: Tx underflow, new csr6 %8.8x.\n",
+ dev->name, new);
+ update_csr6(dev, new);
+ spin_unlock(&np->lock);
}
if (intr_status & IntrRxDied) { /* Missed a Rx frame. */
np->stats.rx_errors++;
}
if (intr_status & TimerInt) {
/* Re-enable other interrupts. */
- writel(0x1A0F5, ioaddr + IntrEnable);
+ spin_lock(&np->lock);
+ if (!np->dev_suspended)
+ writel(0x1A0F5, ioaddr + IntrEnable);
+ spin_unlock(&np->lock);
}
np->stats.rx_missed_errors += readl(ioaddr + RxMissed) & 0xffff;
writel(0, ioaddr + RxStartDemand);
@@ -1307,26 +1411,33 @@
}
writel(mc_filter[0], ioaddr + MulticastFilter0);
writel(mc_filter[1], ioaddr + MulticastFilter1);
- np->csr6 &= ~0x00F8;
- np->csr6 |= rx_mode;
- writel(np->csr6, ioaddr + NetworkConfig);
+ spin_lock_irq(&np->lock);
+ update_csr6(dev, (np->csr6 & ~0x00F8) | rx_mode);
+ spin_unlock_irq(&np->lock);
}

static int mii_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
{
+ struct netdev_private *np = dev->priv;
u16 *data = (u16 *)&rq->ifr_data;

switch(cmd) {
case SIOCDEVPRIVATE: /* Get the address of the PHY in use. */
+ spin_lock_irq(&np->lock);
data[0] = ((struct netdev_private *)dev->priv)->phys[0] & 0x1f;
+ spin_unlock_irq(&np->lock);
/* Fall Through */
case SIOCDEVPRIVATE+1: /* Read the specified MII register. */
+ spin_lock_irq(&np->lock);
data[3] = mdio_read(dev, data[0] & 0x1f, data[1] & 0x1f);
+ spin_unlock_irq(&np->lock);
return 0;
case SIOCDEVPRIVATE+2: /* Write the specified MII register */
if (!capable(CAP_NET_ADMIN))
return -EPERM;
+ spin_lock_irq(&np->lock);
mdio_write(dev, data[0] & 0x1f, data[1] & 0x1f, data[2]);
+ spin_unlock_irq(&np->lock);
return 0;
default:
return -EOPNOTSUPP;
@@ -1348,12 +1459,18 @@
printk(KERN_DEBUG "%s: Queue pointers were Tx %d / %d, Rx %d / %d.\n",
dev->name, np->cur_tx, np->dirty_tx, np->cur_rx, np->dirty_rx);
}
+ /* Prevent further calls to the irq handler first.
+ * Otherwise it could reenable interrupts ..
+ */
+ free_irq(dev->irq, dev);

/* Disable interrupts by clearing the interrupt mask. */
writel(0x0000, ioaddr + IntrEnable);

/* Stop the chip's Tx and Rx processes. */
- writel(np->csr6 &= ~0x20FA, ioaddr + NetworkConfig);
+ spin_lock_irq(&np->lock);
+ update_csr6(dev, np->csr6 & ~0x20FA);
+ spin_unlock_irq(&np->lock);

if (readl(ioaddr + NetworkConfig) != 0xffffffff)
np->stats.rx_missed_errors += readl(ioaddr + RxMissed) & 0xffff;
@@ -1376,11 +1493,10 @@
}
#endif /* __i386__ debugging only */

- free_irq(dev->irq, dev);
-
del_timer_sync(&np->timer);

free_rxtx_rings(np);
+ free_ringdesc(np);

return 0;
}
@@ -1402,11 +1518,72 @@
pci_set_drvdata(pdev, NULL);
}

+static void w840_suspend (struct pci_dev *pdev)
+{
+ struct net_device *dev = pci_get_drvdata (pdev);
+ struct netdev_private *np = dev->priv;
+ long ioaddr = dev->base_addr;
+
+ netif_device_detach(dev);
+ /* no more calls to tx_timeout, hard_start_xmit, set_rx_mode */
+ rtnl_lock();
+ rtnl_unlock();
+ /* noone within ->open */
+ if (netif_running (dev)) {
+ del_timer_sync(&np->timer);
+ /* no more link beat timer calls */
+ spin_lock_irq(&np->lock);
+ update_csr6(dev, np->csr6 & ~0x2002);
+ /* Tx and Rx processes stopped */
+
+ np->dev_suspended = 1;
+ writel(0, ioaddr + IntrEnable);
+ /* all irq events disabled. */
+ spin_unlock_irq(&np->lock);
+
+ synchronize_irq();
+
+ /* Update the error counts. */
+ np->stats.rx_missed_errors += readl(ioaddr + RxMissed) & 0xffff;
+
+ /* pci_power_off(pdev, -1); */
+ /* if (np->drv_flags & HasACPI) {...} */
+
+ free_rxtx_rings(np);
+ }
+}
+
+
+static void w840_resume (struct pci_dev *pdev)
+{
+ struct net_device *dev = pci_get_drvdata (pdev);
+ struct netdev_private *np = dev->priv;
+
+ if (netif_running (dev)) {
+ pci_enable_device(pdev);
+ /* pci_power_on(pdev); */
+ /* if (np->drv_flags & HasACPI) {...} */
+ np->dev_suspended = 0;
+
+ writel(1, dev->base_addr+PCIBusCfg);
+ readl(dev->base_addr+PCIBusCfg);
+ udelay(1);
+ init_rxtx_rings(dev);
+ init_registers(dev);
+
+ np->timer.expires = jiffies + 1*HZ;
+ add_timer(&np->timer);
+ }
+ netif_device_attach(dev);
+}
+
static struct pci_driver w840_driver = {
name: "winbond-840",
id_table: w840_pci_tbl,
probe: w840_probe1,
remove: w840_remove1,
+ suspend: w840_suspend,
+ resume: w840_resume,
};

static int __init w840_init(void)
\
 
 \ /
  Last update: 2005-03-22 12:53    [W:0.045 / U:14.500 seconds]
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