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Date
Subject[PATCH 2.4.19-pre2]
From
	Hi Marcelo,

This patch fix a few critical bugs in the wavelan_cs driver as
included in the kernel. In fact, the driver in the kernel is not
usable.
o Update to "new" network API (softnet - 2.3.43)
o Fix SMP operation
o Fix card lockup on fast processors
This patch is a backport of the wavelan_cs driver in kernel
2.5.3-pre3 (one month old), which is itself a backport of the version
in Pcmcia package over one year old. I've just tested this patch with
2.4.19-pre2 SMP. I don't think it can be more tested than that ;-)
Would you mind adding that to your kernel ?

Regards,

Jean

-------------------------------------------------

diff -u -p -r linux/drivers/net/pcmcia-buggy/wavelan.h linux/drivers/net/pcmcia/wavelan.h
--- linux/drivers/net/pcmcia-buggy/wavelan.h Fri Mar 2 11:02:15 2001
+++ linux/drivers/net/pcmcia/wavelan.h Tue Mar 5 16:11:31 2002
@@ -88,6 +88,7 @@ const short channel_bands[] = { 0x30, 0x
*/
const int fixed_bands[] = { 915e6, 2.425e8, 2.46e8, 2.484e8, 2.4305e8 };

+
/*************************** PC INTERFACE ****************************/

/* WaveLAN host interface definitions */
@@ -316,6 +317,7 @@ struct mmw_t
/* Calculate offset of a field in the above structure */
#define mmwoff(p,f) (unsigned short)((void *)(&((mmw_t *)((void *)0 + (p)))->f) - (void *)0)

+
/*
* Modem Management Controller (MMC) read structure.
*/
@@ -372,6 +374,7 @@ struct mmr_t

/* Calculate offset of a field in the above structure */
#define mmroff(p,f) (unsigned short)((void *)(&((mmr_t *)((void *)0 + (p)))->f) - (void *)0)
+

/* Make the two above structures one */
typedef union mm_t
diff -u -p -r linux/drivers/net/pcmcia-buggy/wavelan_cs.c linux/drivers/net/pcmcia/wavelan_cs.c
--- linux/drivers/net/pcmcia-buggy/wavelan_cs.c Fri Nov 9 15:22:54 2001
+++ linux/drivers/net/pcmcia/wavelan_cs.c Tue Mar 5 16:12:04 2002
@@ -22,7 +22,7 @@
#ifdef WAVELAN_ROAMING
* Roaming support added 07/22/98 by Justin Seger (jseger@media.mit.edu)
* based on patch by Joe Finney from Lancaster University.
-#endif :-)
+#endif
*
* Lucent (formerly AT&T GIS, formerly NCR) WaveLAN PCMCIA card: An
* Ethernet-like radio transceiver controlled by an Intel 82593 coprocessor.
@@ -37,12 +37,6 @@
* Apr 2 '98 made changes to bring the i82593 control/int handling in line
* with offical specs...
*
- * Changes:
- * Arnaldo Carvalho de Melo <acme@conectiva.com.br> - 08/08/2000
- * - reorganize kmallocs in wavelan_attach, checking all for failure
- * and releasing the previous allocations if one fails
- *
- *
****************************************************************************
* Copyright 1995
* Anthony D. Joseph
@@ -72,6 +66,34 @@

/*------------------------------------------------------------------*/
/*
+ * Wrapper for disabling interrupts.
+ * (note : inline, so optimised away)
+ */
+static inline void
+wv_splhi(net_local * lp,
+ unsigned long * pflags)
+{
+ spin_lock_irqsave(&lp->spinlock, *pflags);
+ /* Note : above does the cli(); itself */
+}
+
+/*------------------------------------------------------------------*/
+/*
+ * Wrapper for re-enabling interrupts.
+ */
+static inline void
+wv_splx(net_local * lp,
+ unsigned long * pflags)
+{
+ spin_unlock_irqrestore(&lp->spinlock, *pflags);
+
+ /* Note : enabling interrupts on the hardware is done in wv_ru_start()
+ * via : outb(OP1_INT_ENABLE, LCCR(base));
+ */
+}
+
+/*------------------------------------------------------------------*/
+/*
* Wrapper for reporting error to cardservices
*/
static void cs_error(client_handle_t handle, int func, int ret)
@@ -103,7 +125,7 @@ wv_structuct_check(void)

/******************* MODEM MANAGEMENT SUBROUTINES *******************/
/*
- * Usefull subroutines to manage the modem of the wavelan
+ * Useful subroutines to manage the modem of the wavelan
*/

/*------------------------------------------------------------------*/
@@ -138,7 +160,7 @@ hacr_write_slow(u_long base,
{
hacr_write(base, hacr);
/* delay might only be needed sometimes */
- mdelay(1L);
+ mdelay(1);
} /* hacr_write_slow */

/*------------------------------------------------------------------*/
@@ -529,7 +551,7 @@ void wv_roam_init(struct net_device *dev
lp->curr_point=NULL; /* No default WavePoint */
lp->cell_search=0;

- lp->cell_timer.data=(int)lp; /* Start cell expiry timer */
+ lp->cell_timer.data=(long)lp; /* Start cell expiry timer */
lp->cell_timer.function=wl_cell_expiry;
lp->cell_timer.expires=jiffies+CELL_TIMEOUT;
add_timer(&lp->cell_timer);
@@ -569,18 +591,18 @@ void wv_nwid_filter(unsigned char mode,
#endif

/* Disable interrupts & save flags */
- spin_lock_irqsave (&lp->lock, flags);
+ wv_splhi(lp, &flags);

m.w.mmw_loopt_sel = (mode==NWID_PROMISC) ? MMW_LOOPT_SEL_DIS_NWID : 0x00;
mmc_write(lp->dev->base_addr, (char *)&m.w.mmw_loopt_sel - (char *)&m, (unsigned char *)&m.w.mmw_loopt_sel, 1);

- /* ReEnable interrupts & restore flags */
- spin_unlock_irqrestore (&lp->lock, flags);
-
if(mode==NWID_PROMISC)
lp->cell_search=1;
else
- lp->cell_search=0;
+ lp->cell_search=0;
+
+ /* ReEnable interrupts & restore flags */
+ wv_splx(lp, &flags);
}

/* Find a record in the WavePoint table matching a given NWID */
@@ -737,7 +759,7 @@ void wv_roam_handover(wavepoint_history
ioaddr_t base = lp->dev->base_addr;
mm_t m;
unsigned long flags;
-
+
if(wavepoint==lp->curr_point) /* Sanity check... */
{
wv_nwid_filter(!NWID_PROMISC,lp);
@@ -749,16 +771,16 @@ void wv_roam_handover(wavepoint_history
#endif

/* Disable interrupts & save flags */
- spin_lock_irqsave(&lp->lock, flags);
-
+ wv_splhi(lp, &flags);
+
m.w.mmw_netw_id_l = wavepoint->nwid & 0xFF;
m.w.mmw_netw_id_h = (wavepoint->nwid & 0xFF00) >> 8;

mmc_write(base, (char *)&m.w.mmw_netw_id_l - (char *)&m, (unsigned char *)&m.w.mmw_netw_id_l, 2);

/* ReEnable interrupts & restore flags */
- spin_unlock_irqrestore (&lp->lock, flags);
-
+ wv_splx(lp, &flags);
+
wv_nwid_filter(!NWID_PROMISC,lp);
lp->curr_point=wavepoint;
}
@@ -775,6 +797,11 @@ static inline void wl_roam_gather(device
wavepoint_history *wavepoint=NULL; /* WavePoint table entry */
net_local *lp=(net_local *)dev->priv; /* Device info */

+#ifdef I_NEED_THIS_FEATURE
+ /* Some people don't need this, some other may need it */
+ nwid=nwid^ntohs(beacon->domain_id);
+#endif
+
#if WAVELAN_ROAMING_DEBUG > 1
printk(KERN_DEBUG "WaveLAN: beacon, dev %s:\n",dev->name);
printk(KERN_DEBUG "Domain: %.4X NWID: %.4X SigQual=%d\n",ntohs(beacon->domain_id),nwid,sigqual);
@@ -832,7 +859,9 @@ static inline int WAVELAN_BEACON(unsigne
/*------------------------------------------------------------------*/
/*
* Routine to synchronously send a command to the i82593 chip.
- * Should be called with interrupts enabled.
+ * Should be called with interrupts disabled.
+ * (called by wv_packet_write(), wv_ru_stop(), wv_ru_start(),
+ * wv_82593_config() & wv_diag())
*/
static int
wv_82593_cmd(device * dev,
@@ -841,74 +870,98 @@ wv_82593_cmd(device * dev,
int result)
{
ioaddr_t base = dev->base_addr;
- net_local * lp = (net_local *)dev->priv;
int status;
+ int wait_completed;
long spin;
- u_long flags;

/* Spin until the chip finishes executing its current command (if any) */
+ spin = 1000;
do
{
- spin_lock_irqsave (&lp->lock, flags);
+ /* Time calibration of the loop */
+ udelay(10);
+
+ /* Read the interrupt register */
outb(OP0_NOP | CR0_STATUS_3, LCCR(base));
status = inb(LCSR(base));
- spin_unlock_irqrestore (&lp->lock, flags);
}
- while((status & SR3_EXEC_STATE_MASK) != SR3_EXEC_IDLE);
+ while(((status & SR3_EXEC_STATE_MASK) != SR3_EXEC_IDLE) && (spin-- > 0));

- /* We are waiting for command completion */
- wv_wait_completed = TRUE;
+ /* If the interrupt hasn't be posted */
+ if(spin <= 0)
+ {
+#ifdef DEBUG_INTERRUPT_ERROR
+ printk(KERN_INFO "wv_82593_cmd: %s timeout (previous command), status 0x%02x\n",
+ str, status);
+#endif
+ return(FALSE);
+ }

/* Issue the command to the controller */
outb(cmd, LCCR(base));

- /* If we don't have to check the result of the command */
+ /* If we don't have to check the result of the command
+ * Note : this mean that the irq handler will deal with that */
if(result == SR0_NO_RESULT)
- {
- wv_wait_completed = FALSE;
- return(TRUE);
- }
+ return(TRUE);

- /* Busy wait while the LAN controller executes the command.
- * Note : wv_wait_completed should be volatile */
- spin = 0;
- while(wv_wait_completed && (spin++ < 1000))
- udelay(10);
+ /* We are waiting for command completion */
+ wait_completed = TRUE;

- /* If the interrupt handler hasn't be called */
- if(wv_wait_completed)
+ /* Busy wait while the LAN controller executes the command. */
+ spin = 1000;
+ do
{
- outb(OP0_NOP, LCCR(base));
+ /* Time calibration of the loop */
+ udelay(10);
+
+ /* Read the interrupt register */
+ outb(CR0_STATUS_0 | OP0_NOP, LCCR(base));
status = inb(LCSR(base));
- if(status & SR0_INTERRUPT)
+
+ /* Check if there was an interrupt posted */
+ if((status & SR0_INTERRUPT))
{
- /* There was an interrupt : call the interrupt handler */
-#ifdef DEBUG_INTERRUPT_ERROR
- printk(KERN_WARNING "wv_82593_cmd: interrupt handler not installed or interrupt disabled\n");
-#endif
+ /* Acknowledge the interrupt */
+ outb(CR0_INT_ACK | OP0_NOP, LCCR(base));

- wavelan_interrupt(dev->irq, (void *) dev,
- (struct pt_regs *) NULL);
+ /* Check if interrupt is a command completion */
+ if(((status & SR0_BOTH_RX_TX) != SR0_BOTH_RX_TX) &&
+ ((status & SR0_BOTH_RX_TX) != 0x0) &&
+ !(status & SR0_RECEPTION))
+ {
+ /* Signal command completion */
+ wait_completed = FALSE;
+ }
+ else
+ {
+ /* Note : Rx interrupts will be handled later, because we can
+ * handle multiple Rx packets at once */
+#ifdef DEBUG_INTERRUPT_INFO
+ printk(KERN_INFO "wv_82593_cmd: not our interrupt\n");
+#endif
+ }
}
- else
- {
- wv_wait_completed = 0; /* XXX */
+ }
+ while(wait_completed && (spin-- > 0));
+
+ /* If the interrupt hasn't be posted */
+ if(wait_completed)
+ {
#ifdef DEBUG_INTERRUPT_ERROR
- printk(KERN_INFO "wv_82593_cmd: %s timeout, status0 0x%02x\n",
- str, status);
+ printk(KERN_INFO "wv_82593_cmd: %s timeout, status 0x%02x\n",
+ str, status);
#endif
- /* We probably should reset the controller here */
- return(FALSE);
- }
+ return(FALSE);
}

- /* Check the return code provided by the interrupt handler against
+ /* Check the return code returned by the card (see above) against
* the expected return code provided by the caller */
- if((lp->status & SR0_EVENT_MASK) != result)
+ if((status & SR0_EVENT_MASK) != result)
{
#ifdef DEBUG_INTERRUPT_ERROR
- printk(KERN_INFO "wv_82593_cmd: %s failed, status0 = 0x%x\n",
- str, lp->status);
+ printk(KERN_INFO "wv_82593_cmd: %s failed, status = 0x%x\n",
+ str, status);
#endif
return(FALSE);
}
@@ -924,14 +977,16 @@ wv_82593_cmd(device * dev,
static inline int
wv_diag(device * dev)
{
+ int ret = FALSE;
+
if(wv_82593_cmd(dev, "wv_diag(): diagnose",
OP0_DIAGNOSE, SR0_DIAGNOSE_PASSED))
- return(TRUE);
+ ret = TRUE;

#ifdef DEBUG_CONFIG_ERROR
printk(KERN_INFO "wavelan_cs: i82593 Self Test failed!\n");
#endif
- return(FALSE);
+ return(ret);
} /* wv_diag */

/*------------------------------------------------------------------*/
@@ -951,15 +1006,6 @@ read_ringbuf(device * dev,
int chunk_len;
char * buf_ptr = buf;

-#ifdef OLDIES
- /* After having check skb_put (net/core/skbuff.c) in the kernel, it seem
- * quite safe to remove this... */
-
- /* If buf is NULL, just increment the ring buffer pointer */
- if(buf == NULL)
- return((ring_ptr - RX_BASE + len) % RX_SIZE + RX_BASE);
-#endif
-
/* Get all the buffer */
while(len > 0)
{
@@ -990,70 +1036,32 @@ read_ringbuf(device * dev,
* wavelan_interrupt is not an option...), so you may experience
* some delay sometime...
*/
-static inline void wv_82593_reconfig (device * dev)
+static inline void
+wv_82593_reconfig(device * dev)
{
- net_local *lp = (net_local *) dev->priv;
- dev_link_t *link = ((net_local *) dev->priv)->link;
+ net_local * lp = (net_local *)dev->priv;
+ dev_link_t * link = ((net_local *) dev->priv)->link;
+ unsigned long flags;
+
+ /* Arm the flag, will be cleard in wv_82593_config() */
+ lp->reconfig_82593 = TRUE;

- /* Check if we can do it now ! */
- if (!(link->open)) {
- lp->reconfig_82593 = TRUE;
+ /* Check if we can do it now ! */
+ if((link->open) && (netif_running(dev)) && !(netif_queue_stopped(dev)))
+ {
+ wv_splhi(lp, &flags); /* Disable interrupts */
+ wv_82593_config(dev);
+ wv_splx(lp, &flags); /* Re-enable interrupts */
+ }
+ else
+ {
#ifdef DEBUG_IOCTL_INFO
- printk (KERN_DEBUG "%s: wv_82593_reconfig(): delayed (link = %d)\n",
- dev->name, link->open);
+ printk(KERN_DEBUG
+ "%s: wv_82593_reconfig(): delayed (state = %lX, link = %d)\n",
+ dev->name, dev->state, link->open);
#endif
- } else {
- netif_stop_queue (dev);
-
- lp->reconfig_82593 = FALSE;
- wv_82593_config (dev);
- netif_wake_queue (dev);
- }
-}
-
-#ifdef OLDIES
-/*------------------------------------------------------------------*/
-/*
- * Dumps the current i82593 receive buffer to the console.
- */
-static void wavelan_dump(device *dev)
-{
- ioaddr_t base = dev->base_addr;
- int i, c;
-
- /* disable receiver so we can use channel 1 */
- outb(OP0_RCV_DISABLE, LCCR(base));
-
- /* reset receive DMA pointer */
- hacr_write_slow(base, HACR_PWR_STAT | HACR_RX_DMA_RESET);
- hacr_write(base, HACR_DEFAULT);
-
- /* dump into receive buffer */
- wv_82593_cmd(dev, "wavelan_dump(): dump", CR0_CHNL|OP0_DUMP, SR0_DUMP_DONE);
-
- /* set read pointer to start of receive buffer */
- outb(0, PIORL(base));
- outb(0, PIORH(base));
-
- printk(KERN_DEBUG "wavelan_cs: dump:\n");
- printk(KERN_DEBUG " 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F");
- for(i = 0; i < 73; i++){
- if((i % 16) == 0) {
- printk("\n0x%02x:", i);
- if (!i) {
- printk(" ");
- continue;
- }
}
- c = inb(PIOP(base));
- printk("%02x ", c);
- }
- printk("\n");
-
- /* enable the receiver again */
- wv_ru_start(dev);
}
-#endif

/********************* DEBUG & INFO SUBROUTINES *********************/
/*
@@ -1171,6 +1179,8 @@ wv_mmc_show(device * dev)
return;
}

+ wv_splhi(lp, &flags);
+
/* Read the mmc */
mmc_out(base, mmwoff(0, mmw_freeze), 1);
mmc_read(base, 0, (u_char *)&m, sizeof(m));
@@ -1181,6 +1191,8 @@ wv_mmc_show(device * dev)
lp->wstats.discard.nwid += (m.mmr_wrong_nwid_h << 8) | m.mmr_wrong_nwid_l;
#endif /* WIRELESS_EXT */

+ wv_splx(lp, &flags);
+
printk(KERN_DEBUG "##### wavelan modem status registers: #####\n");
#ifdef DEBUG_SHOW_UNUSED
printk(KERN_DEBUG "mmc_unused0[]: %02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X\n",
@@ -1265,6 +1277,7 @@ static void
wv_dev_show(device * dev)
{
printk(KERN_DEBUG "dev:");
+ printk(" state=%lX,", dev->state);
printk(" trans_start=%ld,", dev->trans_start);
printk(" flags=0x%x,", dev->flags);
printk("\n");
@@ -1892,7 +1905,7 @@ wavelan_ioctl(struct net_device * dev, /
#endif

/* Disable interrupts & save flags */
- spin_lock_irqsave (&lp->lock, flags);
+ wv_splhi(lp, &flags);

/* Look what is the request */
switch(cmd)
@@ -1968,7 +1981,7 @@ wavelan_ioctl(struct net_device * dev, /

case SIOCGIWFREQ:
/* Attempt to recognise 2.00 cards (2.4 GHz frequency selectable)
- * (does it work for everybody XXX - especially old cards...) */
+ * (does it work for everybody ? - especially old cards...) */
if(!(mmc_in(base, mmroff(0, mmr_fee_status)) &
(MMR_FEE_STATUS_DWLD | MMR_FEE_STATUS_BUSY)))
{
@@ -2239,15 +2252,17 @@ wavelan_ioctl(struct net_device * dev, /
{
struct iw_range range;

- /* Set the length (very important for backward compatibility) */
- wrq->u.data.length = sizeof(struct iw_range);
+ /* Set the length (very important for backward compatibility) */
+ wrq->u.data.length = sizeof(struct iw_range);

- /* Set all the info we don't care or don't know about to zero */
- memset(&range, 0, sizeof(range));
+ /* Set all the info we don't care or don't know about to zero */
+ memset(&range, 0, sizeof(range));

- /* Set the Wireless Extension versions */
- range.we_version_compiled = WIRELESS_EXT;
- range.we_version_source = 9; /* Nothing for us in v10 and v11 */
+#if WIRELESS_EXT > 10
+ /* Set the Wireless Extension versions */
+ range.we_version_compiled = WIRELESS_EXT;
+ range.we_version_source = 9; /* Nothing for us in v10 and v11 */
+#endif /* WIRELESS_EXT > 10 */

/* Set information in the range struct */
range.throughput = 1.4 * 1000 * 1000; /* don't argue on this ! */
@@ -2517,7 +2532,7 @@ wavelan_ioctl(struct net_device * dev, /
}

/* ReEnable interrupts & restore flags */
- spin_unlock_irqrestore (&lp->lock, flags);
+ wv_splx(lp, &flags);

#ifdef DEBUG_IOCTL_TRACE
printk(KERN_DEBUG "%s: <-wavelan_ioctl()\n", dev->name);
@@ -2543,11 +2558,8 @@ wavelan_get_wireless_stats(device * dev)
printk(KERN_DEBUG "%s: ->wavelan_get_wireless_stats()\n", dev->name);
#endif

- if (lp == NULL) /* XXX will this ever occur? */
- return NULL;
-
/* Disable interrupts & save flags */
- spin_lock_irqsave (&lp->lock, flags);
+ wv_splhi(lp, &flags);

wstats = &lp->wstats;

@@ -2573,7 +2585,7 @@ wavelan_get_wireless_stats(device * dev)
wstats->discard.misc = 0L;

/* ReEnable interrupts & restore flags */
- spin_unlock_irqrestore (&lp->lock, flags);
+ wv_splx(lp, &flags);

#ifdef DEBUG_IOCTL_TRACE
printk(KERN_DEBUG "%s: <-wavelan_get_wireless_stats()\n", dev->name);
@@ -2692,12 +2704,6 @@ wv_packet_read(device * dev,
skb->protocol = eth_type_trans(skb, dev);

#ifdef DEBUG_RX_INFO
- /* Another glitch : Due to the way the GET_PACKET macro is written,
- * we are not sure to have the same thing in skb->data. On the other
- * hand, skb->mac.raw is not defined everywhere...
- * For versions between 1.2.13 and those where skb->mac.raw appear,
- * I don't have a clue...
- */
wv_packet_info(skb->mac.raw, sksize, dev->name, "wv_packet_read");
#endif /* DEBUG_RX_INFO */

@@ -2731,9 +2737,7 @@ wv_packet_read(device * dev,
wl_roam_gather(dev, skb->data, stats);
#endif /* WAVELAN_ROAMING */

- /* Spying stuff */
#ifdef WIRELESS_SPY
- /* Same as above */
wl_spy_gather(dev, skb->mac.raw + WAVELAN_ADDR_SIZE, stats);
#endif /* WIRELESS_SPY */
#ifdef HISTOGRAM
@@ -2766,6 +2770,7 @@ wv_packet_read(device * dev,
* called to do the actual transfer of the card's data including the
* ethernet header into a packet consisting of an sk_buff chain.
* (called by wavelan_interrupt())
+ * Note : the spinlock is already grabbed for us and irq are disabled.
*/
static inline void
wv_packet_rcv(device * dev)
@@ -2916,7 +2921,7 @@ wv_packet_write(device * dev,
printk(KERN_DEBUG "%s: ->wv_packet_write(%d)\n", dev->name, length);
#endif

- spin_lock_irqsave (&lp->lock, flags);
+ wv_splhi(lp, &flags);

/* Check if we need some padding */
if(clen < ETH_ZLEN)
@@ -2946,15 +2951,7 @@ wv_packet_write(device * dev,
/* Keep stats up to date */
lp->stats.tx_bytes += length;

- /* If watchdog not already active, activate it... */
- if (!timer_pending(&lp->watchdog))
- {
- /* set timer to expire in WATCHDOG_JIFFIES */
- lp->watchdog.expires = jiffies + WATCHDOG_JIFFIES;
- add_timer(&lp->watchdog);
- }
-
- spin_unlock_irqrestore (&lp->lock, flags);
+ wv_splx(lp, &flags);

#ifdef DEBUG_TX_INFO
wv_packet_info((u_char *) buf, length, dev->name, "wv_packet_write");
@@ -2963,56 +2960,57 @@ wv_packet_write(device * dev,
#ifdef DEBUG_TX_TRACE
printk(KERN_DEBUG "%s: <-wv_packet_write()\n", dev->name);
#endif
-
- netif_start_queue (dev);
}

/*------------------------------------------------------------------*/
/*
* This routine is called when we want to send a packet (NET3 callback)
- * In this routine, we check if the hardware is ready to accept
+ * In this routine, we check if the harware is ready to accept
* the packet. We also prevent reentrance. Then, we call the function
* to send the packet...
*/
-static int wavelan_packet_xmit (struct sk_buff *skb,
- device * dev)
+static int
+wavelan_packet_xmit(struct sk_buff * skb,
+ device * dev)
{
- net_local *lp = (net_local *) dev->priv;
+ net_local * lp = (net_local *)dev->priv;
+ unsigned long flags;

#ifdef DEBUG_TX_TRACE
- printk (KERN_DEBUG "%s: ->wavelan_packet_xmit(0x%X)\n", dev->name,
- (unsigned) skb);
+ printk(KERN_DEBUG "%s: ->wavelan_packet_xmit(0x%X)\n", dev->name,
+ (unsigned) skb);
#endif

- /*
- * For ethernet, fill in the header.
- */
+ /*
+ * Block a timer-based transmit from overlapping a previous transmit.
+ * In other words, prevent reentering this routine.
+ */
+ netif_stop_queue(dev);

- netif_stop_queue (dev);
+ /* If somebody has asked to reconfigure the controller,
+ * we can do it now */
+ if(lp->reconfig_82593)
+ {
+ wv_splhi(lp, &flags); /* Disable interrupts */
+ wv_82593_config(dev);
+ wv_splx(lp, &flags); /* Re-enable interrupts */
+ /* Note : the configure procedure was totally synchronous,
+ * so the Tx buffer is now free */
+ }

- /*
- * Block a timer-based transmit from overlapping a previous transmit.
- * In other words, prevent reentering this routine.
- */
- if (1) {
- /* If somebody has asked to reconfigure the controller, we can do it now */
- if (lp->reconfig_82593) {
- lp->reconfig_82593 = FALSE;
- wv_82593_config (dev);
- }
#ifdef DEBUG_TX_ERROR
- if (skb->next)
- printk (KERN_INFO "skb has next\n");
+ if (skb->next)
+ printk(KERN_INFO "skb has next\n");
#endif

- wv_packet_write (dev, skb->data, skb->len);
- }
- dev_kfree_skb (skb);
+ wv_packet_write(dev, skb->data, skb->len);
+
+ dev_kfree_skb(skb);

#ifdef DEBUG_TX_TRACE
- printk (KERN_DEBUG "%s: <-wavelan_packet_xmit()\n", dev->name);
+ printk(KERN_DEBUG "%s: <-wavelan_packet_xmit()\n", dev->name);
#endif
- return (0);
+ return(0);
}

/********************** HARDWARE CONFIGURATION **********************/
@@ -3165,7 +3163,7 @@ wv_mmc_init(device * dev)
*/

/* Attempt to recognise 2.00 cards (2.4 GHz frequency selectable)
- * (does it work for everybody XXX - especially old cards...) */
+ * (does it work for everybody ? - especially old cards...) */
/* Note : WFREQSEL verify that it is able to read from EEprom
* a sensible frequency (address 0x00) + that MMR_FEE_STATUS_ID
* is 0xA (Xilinx version) or 0xB (Ariadne version).
@@ -3223,7 +3221,7 @@ static int
wv_ru_stop(device * dev)
{
ioaddr_t base = dev->base_addr;
- net_local *lp = (net_local *) dev->priv;
+ net_local * lp = (net_local *) dev->priv;
unsigned long flags;
int status;
int spin;
@@ -3232,35 +3230,35 @@ wv_ru_stop(device * dev)
printk(KERN_DEBUG "%s: ->wv_ru_stop()\n", dev->name);
#endif

+ wv_splhi(lp, &flags);
+
/* First, send the LAN controller a stop receive command */
wv_82593_cmd(dev, "wv_graceful_shutdown(): stop-rcv",
OP0_STOP_RCV, SR0_NO_RESULT);

/* Then, spin until the receive unit goes idle */
- spin = 0;
+ spin = 300;
do
{
udelay(10);
- spin_lock_irqsave (&lp->lock, flags);
outb(OP0_NOP | CR0_STATUS_3, LCCR(base));
status = inb(LCSR(base));
- spin_unlock_irqrestore (&lp->lock, flags);
}
- while(((status & SR3_RCV_STATE_MASK) != SR3_RCV_IDLE) && (spin++ < 300));
+ while(((status & SR3_RCV_STATE_MASK) != SR3_RCV_IDLE) && (spin-- > 0));

/* Now, spin until the chip finishes executing its current command */
do
{
udelay(10);
- spin_lock_irqsave (&lp->lock, flags);
outb(OP0_NOP | CR0_STATUS_3, LCCR(base));
status = inb(LCSR(base));
- spin_unlock_irqrestore (&lp->lock, flags);
}
- while(((status & SR3_EXEC_STATE_MASK) != SR3_EXEC_IDLE) && (spin++ < 300));
+ while(((status & SR3_EXEC_STATE_MASK) != SR3_EXEC_IDLE) && (spin-- > 0));
+
+ wv_splx(lp, &flags);

/* If there was a problem */
- if(spin > 300)
+ if(spin <= 0)
{
#ifdef DEBUG_CONFIG_ERROR
printk(KERN_INFO "%s: wv_ru_stop(): The chip doesn't want to stop...\n",
@@ -3287,6 +3285,7 @@ wv_ru_start(device * dev)
{
ioaddr_t base = dev->base_addr;
net_local * lp = (net_local *) dev->priv;
+ unsigned long flags;

#ifdef DEBUG_CONFIG_TRACE
printk(KERN_DEBUG "%s: ->wv_ru_start()\n", dev->name);
@@ -3300,6 +3299,8 @@ wv_ru_start(device * dev)
if(!wv_ru_stop(dev))
return FALSE;

+ wv_splhi(lp, &flags);
+
/* Now we know that no command is being executed. */

/* Set the receive frame pointer and stop pointer */
@@ -3309,8 +3310,17 @@ wv_ru_start(device * dev)
/* Reset ring management. This sets the receive frame pointer to 1 */
outb(OP1_RESET_RING_MNGMT, LCCR(base));

+#if 0
+ /* XXX the i82593 manual page 6-4 seems to indicate that the stop register
+ should be set as below */
+ /* outb(CR1_STOP_REG_UPDATE|((RX_SIZE - 0x40)>> RX_SIZE_SHIFT),LCCR(base));*/
+#elif 0
+ /* but I set it 0 instead */
+ lp->stop = 0;
+#else
/* but I set it to 3 bytes per packet less than 8K */
lp->stop = (0 + RX_SIZE - ((RX_SIZE / 64) * 3)) % RX_SIZE;
+#endif
outb(CR1_STOP_REG_UPDATE | (lp->stop >> RX_SIZE_SHIFT), LCCR(base));
outb(OP1_INT_ENABLE, LCCR(base));
outb(OP1_SWIT_TO_PORT_0, LCCR(base));
@@ -3326,17 +3336,15 @@ wv_ru_start(device * dev)
#ifdef DEBUG_I82593_SHOW
{
int status;
- unsigned long flags;
- int i = 0;
+ int opri;
+ int spin = 10000;

/* spin until the chip starts receiving */
do
{
- spin_lock_irqsave (&lp->lock, flags);
outb(OP0_NOP | CR0_STATUS_3, LCCR(base));
status = inb(LCSR(base));
- spin_unlock_irqrestore (&lp->lock, flags);
- if(i++ > 10000)
+ if(spin-- <= 0)
break;
}
while(((status & SR3_RCV_STATE_MASK) != SR3_RCV_ACTIVE) &&
@@ -3345,6 +3353,9 @@ wv_ru_start(device * dev)
(status & SR3_RCV_STATE_MASK), i);
}
#endif
+
+ wv_splx(lp, &flags);
+
#ifdef DEBUG_CONFIG_TRACE
printk(KERN_DEBUG "%s: <-wv_ru_start()\n", dev->name);
#endif
@@ -3363,6 +3374,7 @@ wv_82593_config(device * dev)
ioaddr_t base = dev->base_addr;
net_local * lp = (net_local *) dev->priv;
struct i82593_conf_block cfblk;
+ int ret = TRUE;

#ifdef DEBUG_CONFIG_TRACE
printk(KERN_DEBUG "%s: ->wv_82593_config()\n", dev->name);
@@ -3457,7 +3469,7 @@ wv_82593_config(device * dev)
hacr_write(base, HACR_DEFAULT);
if(!wv_82593_cmd(dev, "wv_82593_config(): configure",
OP0_CONFIGURE, SR0_CONFIGURE_DONE))
- return(FALSE);
+ ret = FALSE;

/* Initialize adapter's ethernet MAC address */
outb(TX_BASE & 0xff, PIORL(base));
@@ -3471,7 +3483,7 @@ wv_82593_config(device * dev)
hacr_write(base, HACR_DEFAULT);
if(!wv_82593_cmd(dev, "wv_82593_config(): ia-setup",
OP0_IA_SETUP, SR0_IA_SETUP_DONE))
- return(FALSE);
+ ret = FALSE;

#ifdef WAVELAN_ROAMING
/* If roaming is enabled, join the "Beacon Request" multicast group... */
@@ -3508,14 +3520,17 @@ wv_82593_config(device * dev)
hacr_write(base, HACR_DEFAULT);
if(!wv_82593_cmd(dev, "wv_82593_config(): mc-setup",
OP0_MC_SETUP, SR0_MC_SETUP_DONE))
- return(FALSE);
+ ret = FALSE;
lp->mc_count = dev->mc_count; /* remember to avoid repeated reset */
}

+ /* Job done, clear the flag */
+ lp->reconfig_82593 = FALSE;
+
#ifdef DEBUG_CONFIG_TRACE
printk(KERN_DEBUG "%s: <-wv_82593_config()\n", dev->name);
#endif
- return(TRUE);
+ return(ret);
}

/*------------------------------------------------------------------*/
@@ -3594,6 +3609,8 @@ wv_hw_config(device * dev)
{
net_local * lp = (net_local *) dev->priv;
ioaddr_t base = dev->base_addr;
+ unsigned long flags;
+ int ret = FALSE;

#ifdef DEBUG_CONFIG_TRACE
printk(KERN_DEBUG "%s: ->wv_hw_config()\n", dev->name);
@@ -3612,50 +3629,78 @@ wv_hw_config(device * dev)
if(wv_pcmcia_reset(dev) == FALSE)
return FALSE;

- /* Power UP the module + reset the modem + reset host adapter
- * (in fact, reset DMA channels) */
- hacr_write_slow(base, HACR_RESET);
- hacr_write(base, HACR_DEFAULT);
+ /* Disable interrupts */
+ wv_splhi(lp, &flags);

- /* Check if the module has been powered up... */
- if(hasr_read(base) & HASR_NO_CLK)
+ /* Disguised goto ;-) */
+ do
{
+ /* Power UP the module + reset the modem + reset host adapter
+ * (in fact, reset DMA channels) */
+ hacr_write_slow(base, HACR_RESET);
+ hacr_write(base, HACR_DEFAULT);
+
+ /* Check if the module has been powered up... */
+ if(hasr_read(base) & HASR_NO_CLK)
+ {
#ifdef DEBUG_CONFIG_ERRORS
- printk(KERN_WARNING "%s: wv_hw_config(): modem not connected or not a wavelan card\n",
- dev->name);
+ printk(KERN_WARNING "%s: wv_hw_config(): modem not connected or not a wavelan card\n",
+ dev->name);
#endif
- return FALSE;
- }
+ break;
+ }

- /* initialize the modem */
- if(wv_mmc_init(dev) == FALSE)
- return FALSE;
+ /* initialize the modem */
+ if(wv_mmc_init(dev) == FALSE)
+ {
+#ifdef DEBUG_CONFIG_ERRORS
+ printk(KERN_WARNING "%s: wv_hw_config(): Can't configure the modem\n",
+ dev->name);
+#endif
+ break;
+ }

- /* reset the LAN controller (i82593) */
- outb(OP0_RESET, LCCR(base));
- mdelay(1); /* A bit crude ! */
-
- /* Initialize the LAN controller */
- if((wv_82593_config(dev) == FALSE) ||
- (wv_diag(dev) == FALSE))
- {
+ /* reset the LAN controller (i82593) */
+ outb(OP0_RESET, LCCR(base));
+ mdelay(1); /* A bit crude ! */
+
+ /* Initialize the LAN controller */
+ if(wv_82593_config(dev) == FALSE)
+ {
#ifdef DEBUG_CONFIG_ERRORS
- printk(KERN_INFO "%s: wv_hw_config(): i82593 init failed\n", dev->name);
+ printk(KERN_INFO "%s: wv_hw_config(): i82593 init failed\n",
+ dev->name);
#endif
- return FALSE;
- }
+ break;
+ }

- /*
- * insert code for loopback test here
- */
+ /* Diagnostic */
+ if(wv_diag(dev) == FALSE)
+ {
+#ifdef DEBUG_CONFIG_ERRORS
+ printk(KERN_INFO "%s: wv_hw_config(): i82593 diagnostic failed\n",
+ dev->name);
+#endif
+ break;
+ }

- /* The device is now configured */
- lp->configured = 1;
+ /*
+ * insert code for loopback test here
+ */
+
+ /* The device is now configured */
+ lp->configured = 1;
+ ret = TRUE;
+ }
+ while(0);
+
+ /* Re-enable interrupts */
+ wv_splx(lp, &flags);

#ifdef DEBUG_CONFIG_TRACE
printk(KERN_DEBUG "%s: <-wv_hw_config()\n", dev->name);
#endif
- return TRUE;
+ return(ret);
}

/*------------------------------------------------------------------*/
@@ -3675,10 +3720,6 @@ wv_hw_reset(device * dev)
printk(KERN_DEBUG "%s: ->wv_hw_reset()\n", dev->name);
#endif

- /* If watchdog was activated, kill it ! */
- if (timer_pending(&lp->watchdog))
- del_timer(&lp->watchdog);
-
lp->nresets++;
lp->configured = 0;

@@ -3786,13 +3827,13 @@ wv_pcmcia_config(dev_link_t * link)
}

/*
- * Allocate a 4K memory window. Note that the dev_link_t
+ * Allocate a small memory window. Note that the dev_link_t
* structure provides space for one window handle -- if your
* device needs several windows, you'll need to keep track of
* the handles in your private data structure, link->priv.
*/
req.Attributes = WIN_DATA_WIDTH_8|WIN_MEMORY_TYPE_AM|WIN_ENABLE;
- req.Base = 0; req.Size = 0x1000;
+ req.Base = req.Size = 0;
req.AccessSpeed = mem_speed;
link->win = (window_handle_t)link->handle;
i = CardServices(RequestWindow, &link->win, &req);
@@ -3803,7 +3844,7 @@ wv_pcmcia_config(dev_link_t * link)
}

dev->rmem_start = dev->mem_start =
- (u_long)ioremap(req.Base, 0x1000);
+ (u_long)ioremap(req.Base, req.Size);
dev->rmem_end = dev->mem_end = dev->mem_start + req.Size;

mem.CardOffset = 0; mem.Page = 0;
@@ -3817,7 +3858,7 @@ wv_pcmcia_config(dev_link_t * link)
/* Feed device with this info... */
dev->irq = link->irq.AssignedIRQ;
dev->base_addr = link->io.BasePort1;
- netif_start_queue (dev);
+ netif_start_queue(dev);

#ifdef DEBUG_CONFIG_INFO
printk(KERN_DEBUG "wv_pcmcia_config: MEMSTART 0x%x IRQ %d IOPORT 0x%x\n",
@@ -3843,7 +3884,7 @@ wv_pcmcia_config(dev_link_t * link)
return FALSE;
}

- /* XXX Could you explain me this, Dave ? */
+ strcpy(((net_local *) dev->priv)->node.dev_name, dev->name);
link->dev = &((net_local *) dev->priv)->node;

#ifdef DEBUG_CONFIG_TRACE
@@ -3887,7 +3928,7 @@ wv_pcmcia_release(u_long arg) /* Address
CardServices(ReleaseIO, link->handle, &link->io);
CardServices(ReleaseIRQ, link->handle, &link->irq);

- link->state &= ~(DEV_CONFIG | DEV_RELEASE_PENDING | DEV_STALE_CONFIG);
+ link->state &= ~(DEV_CONFIG | DEV_STALE_CONFIG);

#ifdef DEBUG_CONFIG_TRACE
printk(KERN_DEBUG "%s: <- wv_pcmcia_release()\n", dev->name);
@@ -3896,7 +3937,7 @@ wv_pcmcia_release(u_long arg) /* Address

/*------------------------------------------------------------------*/
/*
- * Sometimes, netwave_detach can't be performed following a call from
+ * Sometimes, wavelan_detach can't be performed following a call from
* cardmgr (device still open, pcmcia_release not done) and the device
* is put in a STALE_LINK state and remains in memory.
*
@@ -3970,7 +4011,19 @@ wavelan_interrupt(int irq,
lp = (net_local *) dev->priv;
base = dev->base_addr;

- spin_lock (&lp->lock);
+#ifdef DEBUG_INTERRUPT_INFO
+ /* Check state of our spinlock (it should be cleared) */
+ if(spin_is_locked(&lp->spinlock))
+ printk(KERN_DEBUG
+ "%s: wavelan_interrupt(): spinlock is already locked !!!\n",
+ dev->name);
+#endif
+
+ /* Prevent reentrancy. We need to do that because we may have
+ * multiple interrupt handler running concurently.
+ * It is safe because wv_splhi() disable interrupts before aquiring
+ * the spinlock. */
+ spin_lock(&lp->spinlock);

/* Treat all pending interrupts */
while(1)
@@ -4015,8 +4068,6 @@ wavelan_interrupt(int irq,
break;
}

- lp->status = status0; /* Save current status (for commands) */
-
/* ----------------- RECEIVING PACKET ----------------- */
/*
* When the wavelan signal the reception of a new packet,
@@ -4054,22 +4105,6 @@ wavelan_interrupt(int irq,
* Most likely : transmission done
*/

- /* If we are already waiting elsewhere for the command to complete */
- if(wv_wait_completed)
- {
-#ifdef DEBUG_INTERRUPT_INFO
- printk(KERN_DEBUG "%s: wv_interrupt(): command completed\n",
- dev->name);
-#endif
-
- /* Signal command completion */
- wv_wait_completed = 0;
-
- /* Acknowledge the interrupt */
- outb(CR0_INT_ACK | OP0_NOP, LCCR(base));
- continue;
- }
-
/* If a transmission has been done */
if((status0 & SR0_EVENT_MASK) == SR0_TRANSMIT_DONE ||
(status0 & SR0_EVENT_MASK) == SR0_RETRANSMIT_DONE ||
@@ -4081,10 +4116,6 @@ wavelan_interrupt(int irq,
dev->name);
#endif

- /* If watchdog was activated, kill it ! */
- if(timer_pending(&lp->watchdog))
- del_timer(&lp->watchdog);
-
/* Get transmission status */
tx_status = inb(LCSR(base));
tx_status |= (inb(LCSR(base)) << 8);
@@ -4174,7 +4205,7 @@ wavelan_interrupt(int irq,
lp->stats.collisions += (tx_status & TX_NCOL_MASK);
lp->stats.tx_packets++;

- netif_wake_queue (dev);
+ netif_wake_queue(dev);
outb(CR0_INT_ACK | OP0_NOP, LCCR(base)); /* Acknowledge the interrupt */
}
else /* if interrupt = transmit done or retransmit done */
@@ -4185,9 +4216,9 @@ wavelan_interrupt(int irq,
#endif
outb(CR0_INT_ACK | OP0_NOP, LCCR(base)); /* Acknowledge the interrupt */
}
- }
+ } /* while(1) */

- spin_unlock_irq (&lp->lock);
+ spin_unlock(&lp->spinlock);

#ifdef DEBUG_INTERRUPT_TRACE
printk(KERN_DEBUG "%s: <-wavelan_interrupt()\n", dev->name);
@@ -4196,30 +4227,23 @@ wavelan_interrupt(int irq,

/*------------------------------------------------------------------*/
/*
- * Watchdog : when we start a transmission, we set a timer in the
- * kernel. If the transmission complete, this timer is disabled. If
- * it expire, it try to unlock the hardware.
+ * Watchdog: when we start a transmission, a timer is set for us in the
+ * kernel. If the transmission completes, this timer is disabled. If
+ * the timer expires, we are called and we try to unlock the hardware.
*
- * Note : this watchdog doesn't work on the same principle as the
- * watchdog in the ISA driver. I make it this way because the overhead
- * of add_timer() and del_timer() is nothing and that it avoid calling
- * the watchdog, saving some CPU... If you want to apply the same
- * watchdog to the ISA driver, you should be a bit carefull, because
- * of the many transmit buffers...
- * This watchdog is also move clever, it try to abort the current
- * command before reseting everything...
+ * Note : This watchdog is move clever than the one in the ISA driver,
+ * because it try to abort the current command before reseting
+ * everything...
+ * On the other hand, it's a bit simpler, because we don't have to
+ * deal with the multiple Tx buffers...
*/
static void
-wavelan_watchdog(u_long a)
+wavelan_watchdog(device * dev)
{
- device * dev;
- net_local * lp;
- ioaddr_t base;
- int spin;
-
- dev = (device *) a;
- base = dev->base_addr;
- lp = (net_local *) dev->priv;
+ net_local * lp = (net_local *) dev->priv;
+ ioaddr_t base = dev->base_addr;
+ unsigned long flags;
+ int aborted = FALSE;

#ifdef DEBUG_INTERRUPT_TRACE
printk(KERN_DEBUG "%s: ->wavelan_watchdog()\n", dev->name);
@@ -4230,21 +4254,21 @@ wavelan_watchdog(u_long a)
dev->name);
#endif

- /* We are waiting for command completion */
- wv_wait_completed = TRUE;
+ wv_splhi(lp, &flags);

/* Ask to abort the current command */
outb(OP0_ABORT, LCCR(base));

- /* Busy wait while the LAN controller executes the command.
- * Note : wv_wait_completed should be volatile */
- spin = 0;
- while(wv_wait_completed && (spin++ < 250))
- udelay(10);
-
- /* If the interrupt handler hasn't be called or invalid status */
- if((wv_wait_completed) ||
- ((lp->status & SR0_EVENT_MASK) != SR0_EXECUTION_ABORTED))
+ /* Wait for the end of the command (a bit hackish) */
+ if(wv_82593_cmd(dev, "wavelan_watchdog(): abort",
+ OP0_NOP | CR0_STATUS_3, SR0_EXECUTION_ABORTED))
+ aborted = TRUE;
+
+ /* Release spinlock here so that wv_hw_reset() can grab it */
+ wv_splx(lp, &flags);
+
+ /* Check if we were successful in aborting it */
+ if(!aborted)
{
/* It seem that it wasn't enough */
#ifdef DEBUG_INTERRUPT_ERROR
@@ -4269,7 +4293,7 @@ wavelan_watchdog(u_long a)
#endif

/* We are no more waiting for something... */
- netif_start_queue (dev);
+ netif_wake_queue(dev);

#ifdef DEBUG_INTERRUPT_TRACE
printk(KERN_DEBUG "%s: <-wavelan_watchdog()\n", dev->name);
@@ -4322,7 +4346,7 @@ wavelan_open(device * dev)
return FALSE;
if(!wv_ru_start(dev))
wv_hw_reset(dev); /* If problem : reset */
- netif_start_queue (dev);
+ netif_start_queue(dev);

/* Mark the device as used */
link->open++;
@@ -4348,7 +4372,6 @@ static int
wavelan_close(device * dev)
{
dev_link_t * link = ((net_local *) dev->priv)->link;
- net_local * lp = (net_local *)dev->priv;
ioaddr_t base = dev->base_addr;

#ifdef DEBUG_CALLBACK_TRACE
@@ -4356,8 +4379,6 @@ wavelan_close(device * dev)
(unsigned int) dev);
#endif

- netif_stop_queue (dev);
-
/* If the device isn't open, then nothing to do */
if(!link->open)
{
@@ -4373,17 +4394,13 @@ wavelan_close(device * dev)
wv_roam_cleanup(dev);
#endif /* WAVELAN_ROAMING */

- /* If watchdog was activated, kill it ! */
- if(timer_pending(&lp->watchdog))
- del_timer(&lp->watchdog);
-
link->open--;
MOD_DEC_USE_COUNT;

/* If the card is still present */
- if (netif_device_present(dev))
+ if(netif_running(dev))
{
- netif_stop_queue (dev);
+ netif_stop_queue(dev);

/* Stop receiving new messages and wait end of transmission */
wv_ru_stop(dev);
@@ -4404,21 +4421,6 @@ wavelan_close(device * dev)

/*------------------------------------------------------------------*/
/*
- * We never need to do anything when a wavelan device is "initialized"
- * by the net software, because we only register already-found cards.
- */
-static int
-wavelan_init(device * dev)
-{
-#ifdef DEBUG_CALLBACK_TRACE
- printk(KERN_DEBUG "<>wavelan_init()\n");
-#endif
-
- return(0);
-}
-
-/*------------------------------------------------------------------*/
-/*
* wavelan_attach() creates an "instance" of the driver, allocating
* local data structures for one device (one interface). The device
* is registered with Card Services.
@@ -4445,24 +4447,8 @@ wavelan_attach(void)

/* Initialize the dev_link_t structure */
link = kmalloc(sizeof(struct dev_link_t), GFP_KERNEL);
- if (!link)
- return NULL;
-
- /* Allocate the generic data structure */
- dev = kmalloc(sizeof(struct net_device), GFP_KERNEL);
- if (!dev)
- goto fail_alloc_dev;
-
- /* Allocate the wavelan-specific data structure. */
- lp = (net_local *) kmalloc(sizeof(net_local), GFP_KERNEL);
- if (!lp)
- goto fail_alloc_dev_priv;
-
- memset(lp, 0, sizeof(net_local));
+ if (!link) return NULL;
memset(link, 0, sizeof(struct dev_link_t));
- memset(dev, 0, sizeof(struct net_device));
-
- dev->priv = lp;

/* Unused for the Wavelan */
link->release.function = &wv_pcmcia_release;
@@ -4492,18 +4478,35 @@ wavelan_attach(void)
link->next = dev_list;
dev_list = link;

+ /* Allocate the generic data structure */
+ dev = kmalloc(sizeof(struct net_device), GFP_KERNEL);
+ if (!dev) {
+ kfree(link);
+ return NULL;
+ }
+ memset(dev, 0x00, sizeof(struct net_device));
link->priv = link->irq.Instance = dev;

+ /* Allocate the wavelan-specific data structure. */
+ dev->priv = lp = (net_local *) kmalloc(sizeof(net_local), GFP_KERNEL);
+ if (!lp) {
+ kfree(link);
+ kfree(dev);
+ return NULL;
+ }
+ memset(lp, 0x00, sizeof(net_local));
+
/* Init specific data */
- wv_wait_completed = 0;
- lp->status = FALSE;
lp->configured = 0;
lp->reconfig_82593 = FALSE;
lp->nresets = 0;
+ /* Multicast stuff */
+ lp->promiscuous = 0;
+ lp->allmulticast = 0;
+ lp->mc_count = 0;

- /* Set the watchdog timer */
- lp->watchdog.function = wavelan_watchdog;
- lp->watchdog.data = (unsigned long) dev;
+ /* Init spinlock */
+ spin_lock_init(&lp->spinlock);

/* back links */
lp->link = link;
@@ -4513,7 +4516,6 @@ wavelan_attach(void)
ether_setup(dev);

/* wavelan NET3 callbacks */
- dev->init = &wavelan_init;
dev->open = &wavelan_open;
dev->stop = &wavelan_close;
dev->hard_start_xmit = &wavelan_packet_xmit;
@@ -4523,14 +4525,16 @@ wavelan_attach(void)
dev->set_mac_address = &wavelan_set_mac_address;
#endif /* SET_MAC_ADDRESS */

+ /* Set the watchdog timer */
+ dev->tx_timeout = &wavelan_watchdog;
+ dev->watchdog_timeo = WATCHDOG_JIFFIES;
+
#ifdef WIRELESS_EXT /* If wireless extension exist in the kernel */
dev->do_ioctl = wavelan_ioctl; /* wireless extensions */
dev->get_wireless_stats = wavelan_get_wireless_stats;
#endif

/* Other specific data */
- strcpy(dev->name, ((net_local *)dev->priv)->node.dev_name);
- netif_start_queue (dev);
dev->mtu = WAVELAN_MTU;

/* Register with Card Services */
@@ -4562,12 +4566,6 @@ wavelan_attach(void)
#endif

return link;
-
-fail_alloc_dev_priv:
- kfree(dev);
-fail_alloc_dev:
- kfree(link);
- return NULL;
}

/*------------------------------------------------------------------*/
@@ -4698,7 +4696,7 @@ wavelan_event(event_t event, /* The ev
if(link->state & DEV_CONFIG)
{
/* Accept no more transmissions */
- netif_device_detach(dev);
+ netif_device_detach(dev);

/* Release the card */
wv_pcmcia_release((u_long) link);
@@ -4720,7 +4718,7 @@ wavelan_event(event_t event, /* The ev
* obliged to close nicely the wavelan here. David, could you
* close the device before suspending them ? And, by the way,
* could you, on resume, add a "route add -net ..." after the
- * ifconfig up XXX Thanks... */
+ * ifconfig up ? Thanks... */

/* Stop receiving new messages and wait end of transmission */
wv_ru_stop(dev);
@@ -4735,8 +4733,7 @@ wavelan_event(event_t event, /* The ev
if(link->state & DEV_CONFIG)
{
if(link->open)
- netif_device_detach(dev);
-
+ netif_device_detach(dev);
CardServices(ReleaseConfiguration, link->handle);
}
break;
@@ -4748,7 +4745,7 @@ wavelan_event(event_t event, /* The ev
if(link->state & DEV_CONFIG)
{
CardServices(RequestConfiguration, link->handle, &link->conf);
- if(link->open) /* If RESET -> True, If RESUME -> False XXX */
+ if(link->open) /* If RESET -> True, If RESUME -> False ? */
{
wv_hw_reset(dev);
netif_device_attach(dev);
@@ -4838,4 +4835,3 @@ exit_wavelan_cs(void)

module_init(init_wavelan_cs);
module_exit(exit_wavelan_cs);
-MODULE_LICENSE("Dual BSD/GPL");
diff -u -p -r linux/drivers/net/pcmcia-buggy/wavelan_cs.h linux/drivers/net/pcmcia/wavelan_cs.h
--- linux/drivers/net/pcmcia-buggy/wavelan_cs.h Tue Mar 5 15:48:13 2002
+++ linux/drivers/net/pcmcia/wavelan_cs.h Tue Mar 5 16:11:31 2002
@@ -34,6 +34,25 @@
* I try to maintain a web page with the Wireless LAN Howto at :
* http://www.hpl.hp.com/personal/Jean_Tourrilhes/Linux/Wavelan.html
*
+ * SMP
+ * ---
+ * We now are SMP compliant (I eventually fixed the remaining bugs).
+ * The driver has been tested on a dual P6-150 and survived my usual
+ * set of torture tests.
+ * Anyway, I spent enough time chasing interrupt re-entrancy during
+ * errors or reconfigure, and I designed the locked/unlocked sections
+ * of the driver with great care, and with the recent addition of
+ * the spinlock (thanks to the new API), we should be quite close to
+ * the truth.
+ * The SMP/IRQ locking is quite coarse and conservative (i.e. not fast),
+ * but better safe than sorry (especially at 2 Mb/s ;-).
+ *
+ * I have also looked into disabling only our interrupt on the card
+ * (via HACR) instead of all interrupts in the processor (via cli),
+ * so that other driver are not impacted, and it look like it's
+ * possible, but it's very tricky to do right (full of races). As
+ * the gain would be mostly for SMP systems, it can wait...
+ *
* Debugging and options
* ---------------------
* You will find below a set of '#define" allowing a very fine control
@@ -122,7 +141,7 @@
* Yunzhou Li <yunzhou@strat.iol.unh.edu> finished is work.
* Joe Finney <joe@comp.lancs.ac.uk> patched the driver to start
* correctly 2.00 cards (2.4 GHz with frequency selection).
- * David Hinds <dhinds@pcmcia.sourceforge.org> integrated the whole in his
+ * David Hinds <dahinds@users.sourceforge.net> integrated the whole in his
* Pcmcia package (+ bug corrections).
*
* I (Jean Tourrilhes - jt@hplb.hpl.hp.com) then started to make some
@@ -158,8 +177,8 @@
*
* This software was originally developed under Linux 1.2.3
* (Slackware 2.0 distribution).
- * And then under Linux 2.0.x (Debian 1.1 - pcmcia 2.8.18-23) with
- * HP OmniBook 4000 & 5500.
+ * And then under Linux 2.0.x (Debian 1.1 -> 2.2 - pcmcia 2.8.18+)
+ * with an HP OmniBook 4000 and then a 5500.
*
* It is based on other device drivers and information either written
* or supplied by:
@@ -174,7 +193,7 @@
* Matthew Geier (matthew@cs.su.oz.au),
* Remo di Giovanni (remo@cs.su.oz.au),
* Mark Hagan (mhagan@wtcpost.daytonoh.NCR.COM),
- * David Hinds <dhinds@pcmcia.sourceforge.org>,
+ * David Hinds <dahinds@users.sourceforge.net>,
* Jan Hoogendoorn (c/o marteijn@lucent.com),
* Bruce Janson <bruce@cs.usyd.edu.au>,
* Anthony D. Joseph <adj@lcs.mit.edu>,
@@ -349,6 +368,32 @@
* - Fix check for root permission (break instead of exit)
* - New nwid & encoding setting (Wireless Extension 9)
*
+ * Changes made for release in 3.1.12 :
+ * ----------------------------------
+ * - reworked wv_82593_cmd to avoid using the IRQ handler and doing
+ * ugly things with interrupts.
+ * - Add IRQ protection in 82593_config/ru_start/ru_stop/watchdog
+ * - Update to new network API (softnet - 2.3.43) :
+ * o replace dev->tbusy (David + me)
+ * o replace dev->tstart (David + me)
+ * o remove dev->interrupt (David)
+ * o add SMP locking via spinlock in splxx (me)
+ * o add spinlock in interrupt handler (me)
+ * o use kernel watchdog instead of ours (me)
+ * o verify that all the changes make sense and work (me)
+ * - Re-sync kernel/pcmcia versions (not much actually)
+ * - A few other cleanups (David & me)...
+ *
+ * Changes made for release in 3.1.22 :
+ * ----------------------------------
+ * - Check that SMP works, remove annoying log message
+ *
+ * Changes made for release in 3.1.24 :
+ * ----------------------------------
+ * - Fix unfrequent card lockup when watchdog was reseting the hardware :
+ * o control first busy loop in wv_82593_cmd()
+ * o Extend spinlock protection in wv_hw_config()
+ *
* Wishes & dreams:
* ----------------
* - Cleanup and integrate the roaming code
@@ -368,6 +413,7 @@
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/interrupt.h>
+#include <linux/spinlock.h>
#include <linux/in.h>
#include <linux/delay.h>
#include <asm/uaccess.h>
@@ -384,7 +430,7 @@

#ifdef CONFIG_NET_PCMCIA_RADIO
#include <linux/wireless.h> /* Wireless extensions */
-#endif /* CONFIG_NET_PCMCIA_RADIO */
+#endif

/* Pcmcia headers that we need */
#include <pcmcia/cs_types.h>
@@ -437,7 +483,7 @@
#undef DEBUG_RX_INFO /* Header of the transmitted packet */
#undef DEBUG_RX_FAIL /* Normal failure conditions */
#define DEBUG_RX_ERROR /* Unexpected conditions */
-#undef DEBUG_PACKET_DUMP /* Dump packet on the screen */
+#undef DEBUG_PACKET_DUMP 32 /* Dump packet on the screen */
#undef DEBUG_IOCTL_TRACE /* Misc call by Linux */
#undef DEBUG_IOCTL_INFO /* Various debug info */
#define DEBUG_IOCTL_ERROR /* What's going wrong */
@@ -452,7 +498,7 @@
/************************ CONSTANTS & MACROS ************************/

#ifdef DEBUG_VERSION_SHOW
-static const char *version = "wavelan_cs.c : v21 (wireless extensions) 18/10/99\n";
+static const char *version = "wavelan_cs.c : v23 (SMP + wireless extensions) 20/12/00\n";
#endif

/* Watchdog temporisation */
@@ -557,9 +603,9 @@ typedef u_char mac_addr[WAVELAN_ADDR_SI
*/
struct net_local
{
- spinlock_t lock;
dev_node_t node; /* ???? What is this stuff ???? */
device * dev; /* Reverse link... */
+ spinlock_t spinlock; /* Serialize access to the hardware (SMP) */
dev_link_t * link; /* pcmcia structure */
en_stats stats; /* Ethernet interface statistics */
int nresets; /* Number of hw resets */
@@ -568,9 +614,7 @@ struct net_local
u_char promiscuous; /* Promiscuous mode */
u_char allmulticast; /* All Multicast mode */
int mc_count; /* Number of multicast addresses */
- timer_list watchdog; /* To avoid blocking state */

- u_char status; /* Current i82593 status */
int stop; /* Current i82593 Stop Hit Register */
int rfp; /* Last DMA machine receive pointer */
int overrunning; /* Receiver overrun flag */
@@ -617,8 +661,14 @@ void wv_roam_cleanup(struct net_device *
#endif /* WAVELAN_ROAMING */

/* ----------------------- MISC SUBROUTINES ------------------------ */
+static inline void
+ wv_splhi(net_local *, /* Disable interrupts */
+ unsigned long *); /* flags */
+static inline void
+ wv_splx(net_local *, /* ReEnable interrupts */
+ unsigned long *); /* flags */
static void
- cs_error(client_handle_t, /* Report error to cardmgr */
+ cs_error(client_handle_t, /* Report error to cardmgr */
int,
int);
/* ----------------- MODEM MANAGEMENT SUBROUTINES ----------------- */
@@ -722,16 +772,15 @@ static void
wv_flush_stale_links(void); /* "detach" all possible devices */
/* ---------------------- INTERRUPT HANDLING ---------------------- */
static void
-wavelan_interrupt(int, /* Interrupt handler */
- void *,
- struct pt_regs *);
+ wavelan_interrupt(int, /* Interrupt handler */
+ void *,
+ struct pt_regs *);
static void
- wavelan_watchdog(u_long); /* Transmission watchdog */
+ wavelan_watchdog(device *); /* Transmission watchdog */
/* ------------------- CONFIGURATION CALLBACKS ------------------- */
static int
wavelan_open(device *), /* Open the device */
- wavelan_close(device *), /* Close the device */
- wavelan_init(device *); /* Do nothing */
+ wavelan_close(device *); /* Close the device */
static dev_link_t *
wavelan_attach(void); /* Create a new device */
static void
@@ -744,11 +793,7 @@ static int
/**************************** VARIABLES ****************************/

static dev_info_t dev_info = "wavelan_cs";
-static dev_link_t *dev_list; /* Linked list of devices */
-
-/* WARNING : the following variable MUST be volatile
- * It is used by wv_82593_cmd to syncronise with wavelan_interrupt */
-static volatile int wv_wait_completed;
+static dev_link_t *dev_list = NULL; /* Linked list of devices */

/*
* Parameters that can be set with 'insmod'
@@ -761,7 +806,7 @@ static int irq_mask = 0xdeb8;
static int irq_list[4] = { -1 };

/* Shared memory speed, in ns */
-static int mem_speed;
+static int mem_speed = 0;

/* New module interface */
MODULE_PARM(irq_mask, "i");
@@ -770,9 +815,11 @@ MODULE_PARM(mem_speed, "i");

#ifdef WAVELAN_ROAMING /* Conditional compile, see above in options */
/* Enable roaming mode ? No ! Please keep this to 0 */
-static int do_roaming;
+static int do_roaming = 0;
MODULE_PARM(do_roaming, "i");
#endif /* WAVELAN_ROAMING */
+
+MODULE_LICENSE("GPL");

#endif /* WAVELAN_CS_H */

-
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