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authorFinn Thain <fthain@telegraphics.com.au>2007-05-02 12:55:56 +1000
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-04 17:59:08 -0700
commitf4d86754f956ab5ea73aa91759a0d89a2f0e3f2a (patch)
tree6afaeefe24fa98385a5f3de6557a31689456071a /drivers/net/macsonic.c
parentd74472f0b2553e59eafb7feee0ff9558136a17e0 (diff)
downloadlwn-f4d86754f956ab5ea73aa91759a0d89a2f0e3f2a.tar.gz
lwn-f4d86754f956ab5ea73aa91759a0d89a2f0e3f2a.zip
SONIC interrupt handling
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>
Diffstat (limited to 'drivers/net/macsonic.c')
-rw-r--r--drivers/net/macsonic.c46
1 files changed, 42 insertions, 4 deletions
diff --git a/drivers/net/macsonic.c b/drivers/net/macsonic.c
index c78a7e2e8ba8..e9ecdbf352ae 100644
--- a/drivers/net/macsonic.c
+++ b/drivers/net/macsonic.c
@@ -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)