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SONIC interrupt handling

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Install the built-in macsonic interrupt handler on both IRQs when using
via_alt_mapping. Otherwise the rare interrupt that still comes from the
nubus slot will wedge the nubus.

$ cat /proc/interrupts
auto       2:      89176 via2
auto       3:     744367 sonic
auto       4:          0 scc
auto       6:     318363 via1
auto       7:          0 NMI
mac        9:     119413 framebuffer vbl
mac       10:       1971 ADB
mac       14:     198517 timer
mac       17:      89104 nubus
mac       19:         72 Mac ESP SCSI
mac       56:        629 sonic
mac       62:    1142593 ide0

Version 1 of this patch had a bug where a nubus sonic card would register
two interrupt handlers. Only a built-in sonic needs both.

Versions 2 and 3 needed some cleanups, as Raylynn Knight and Christoph
Hellwig pointed out (thanks).

Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Finn Thain 2007-05-02 12:55:56 +10:00 committed by Linus Torvalds
parent d74472f0b2
commit f4d86754f9
3 changed files with 61 additions and 33 deletions
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23
drivers/net/jazzsonic.c
View File

@ -88,6 +88,23 @@ static unsigned short known_revisions[] =
0xffff /* end of list */
};
static int jazzsonic_open(struct net_device* dev)
{
if (request_irq(dev->irq, &sonic_interrupt, IRQF_DISABLED, "sonic", dev)) {
printk(KERN_ERR "%s: unable to get IRQ %d.\n", dev->name, dev->irq);
return -EAGAIN;
}
return sonic_open(dev);
}
static int jazzsonic_close(struct net_device* dev)
{
int err;
err = sonic_close(dev);
free_irq(dev->irq, dev);
return err;
}
static int __init sonic_probe1(struct net_device *dev)
{
static unsigned version_printed;
@ -169,8 +186,8 @@ static int __init sonic_probe1(struct net_device *dev)
lp->rra_laddr = lp->rda_laddr + (SIZEOF_SONIC_RD * SONIC_NUM_RDS
* SONIC_BUS_SCALE(lp->dma_bitmode));
dev->open = sonic_open;
dev->stop = sonic_close;
dev->open = jazzsonic_open;
dev->stop = jazzsonic_close;
dev->hard_start_xmit = sonic_send_packet;
dev->get_stats = sonic_get_stats;
dev->set_multicast_list = &sonic_multicast_list;
@ -260,8 +277,6 @@ MODULE_DESCRIPTION("Jazz SONIC ethernet driver");
module_param(sonic_debug, int, 0);
MODULE_PARM_DESC(sonic_debug, "jazzsonic debug level (1-4)");
#define SONIC_IRQ_FLAG IRQF_DISABLED
#include "sonic.c"
static int __devexit jazz_sonic_device_remove (struct platform_device *pdev)

46
drivers/net/macsonic.c
View File

@ -130,6 +130,46 @@ static inline void bit_reverse_addr(unsigned char addr[6])
addr[i] = bitrev8(addr[i]);
}
static irqreturn_t macsonic_interrupt(int irq, void *dev_id)
{
irqreturn_t result;
unsigned long flags;
local_irq_save(flags);
result = sonic_interrupt(irq, dev_id);
local_irq_restore(flags);
return result;
}
static int macsonic_open(struct net_device* dev)
{
if (request_irq(dev->irq, &sonic_interrupt, IRQ_FLG_FAST, "sonic", dev)) {
printk(KERN_ERR "%s: unable to get IRQ %d.\n", dev->name, dev->irq);
return -EAGAIN;
}
/* Under the A/UX interrupt scheme, the onboard SONIC interrupt comes
* in at priority level 3. However, we sometimes get the level 2 inter-
* rupt as well, which must prevent re-entrance of the sonic handler.
*/
if (dev->irq == IRQ_AUTO_3)
if (request_irq(IRQ_NUBUS_9, &macsonic_interrupt, IRQ_FLG_FAST, "sonic", dev)) {
printk(KERN_ERR "%s: unable to get IRQ %d.\n", dev->name, IRQ_NUBUS_9);
free_irq(dev->irq, dev);
return -EAGAIN;
}
return sonic_open(dev);
}
static int macsonic_close(struct net_device* dev)
{
int err;
err = sonic_close(dev);
free_irq(dev->irq, dev);
if (dev->irq == IRQ_AUTO_3)
free_irq(IRQ_NUBUS_9, dev);
return err;
}
int __init macsonic_init(struct net_device* dev)
{
struct sonic_local* lp = netdev_priv(dev);
@ -160,8 +200,8 @@ int __init macsonic_init(struct net_device* dev)
lp->rra_laddr = lp->rda_laddr + (SIZEOF_SONIC_RD * SONIC_NUM_RDS
* SONIC_BUS_SCALE(lp->dma_bitmode));
dev->open = sonic_open;
dev->stop = sonic_close;
dev->open = macsonic_open;
dev->stop = macsonic_close;
dev->hard_start_xmit = sonic_send_packet;
dev->get_stats = sonic_get_stats;
dev->set_multicast_list = &sonic_multicast_list;
@ -572,8 +612,6 @@ MODULE_DESCRIPTION("Macintosh SONIC ethernet driver");
module_param(sonic_debug, int, 0);
MODULE_PARM_DESC(sonic_debug, "macsonic debug level (1-4)");
#define SONIC_IRQ_FLAG IRQ_FLG_FAST
#include "sonic.c"
static int __devexit mac_sonic_device_remove (struct platform_device *pdev)

25
drivers/net/sonic.c
View File

@ -50,29 +50,6 @@ static int sonic_open(struct net_device *dev)
if (sonic_debug > 2)
printk("sonic_open: initializing sonic driver.\n");
/*
* We don't need to deal with auto-irq stuff since we
* hardwire the sonic interrupt.
*/
/*
* XXX Horrible work around: We install sonic_interrupt as fast interrupt.
* This means that during execution of the handler interrupt are disabled
* covering another bug otherwise corrupting data. This doesn't mean
* this glue works ok under all situations.
*
* Note (dhd): this also appears to prevent lockups on the Macintrash
* when more than one Ethernet card is installed (knock on wood)
*
* Note (fthain): whether the above is still true is anyones guess. Certainly
* the buffer handling algorithms will not tolerate re-entrance without some
* mutual exclusion added. Anyway, the memcpy has now been eliminated from the
* rx code to make this a faster "fast interrupt".
*/
if (request_irq(dev->irq, &sonic_interrupt, SONIC_IRQ_FLAG, "sonic", dev)) {
printk(KERN_ERR "\n%s: unable to get IRQ %d .\n", dev->name, dev->irq);
return -EAGAIN;
}
for (i = 0; i < SONIC_NUM_RRS; i++) {
struct sk_buff *skb = dev_alloc_skb(SONIC_RBSIZE + 2);
if (skb == NULL) {
@ -169,8 +146,6 @@ static int sonic_close(struct net_device *dev)
}
}
free_irq(dev->irq, dev); /* release the IRQ */
return 0;
}