Subject: [PATCH 13/13] SONIC interrupt handling Cc: Thomas Bogendoerfer , Jeff Garzik , netdev@vger.kernel.org, linux-mips@linux-mips.org From: Finn Thain 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 --- drivers/net/jazzsonic.c | 23 +++++++++++++++++++---- drivers/net/macsonic.c | 46 ++++++++++++++++++++++++++++++++++++++++++---- drivers/net/sonic.c | 25 ------------------------- 3 files changed, 61 insertions(+), 33 deletions(-) --- a/drivers/net/jazzsonic.c +++ b/drivers/net/jazzsonic.c @@ -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 ne 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 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) --- a/drivers/net/macsonic.c +++ b/drivers/net/macsonic.c @@ -130,6 +130,46 @@ static inline void bit_reverse_addr(unsi 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_devi 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 ethe 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) --- a/drivers/net/sonic.c +++ b/drivers/net/sonic.c @@ -50,29 +50,6 @@ static int sonic_open(struct net_device 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) { @@ -170,8 +147,6 @@ static int sonic_close(struct net_device } } - free_irq(dev->irq, dev); /* release the IRQ */ - return 0; }