/*
- * Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
+ * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Licensed under the GPL
* Derived (i.e. mostly copied) from arch/i386/kernel/irq.c:
* Copyright (C) 1992, 1998 Linus Torvalds, Ingo Molnar
*/
-#include "linux/kernel.h"
-#include "linux/module.h"
-#include "linux/smp.h"
-#include "linux/kernel_stat.h"
+#include "linux/cpumask.h"
+#include "linux/hardirq.h"
#include "linux/interrupt.h"
-#include "linux/random.h"
-#include "linux/slab.h"
-#include "linux/file.h"
-#include "linux/proc_fs.h"
-#include "linux/init.h"
+#include "linux/kernel_stat.h"
+#include "linux/module.h"
#include "linux/seq_file.h"
-#include "linux/profile.h"
-#include "linux/hardirq.h"
-#include "asm/irq.h"
-#include "asm/hw_irq.h"
-#include "asm/atomic.h"
-#include "asm/signal.h"
-#include "asm/system.h"
-#include "asm/errno.h"
-#include "asm/uaccess.h"
+#include "as-layout.h"
#include "kern_util.h"
-#include "irq_user.h"
-#include "irq_kern.h"
#include "os.h"
-#include "sigio.h"
-#include "misc_constants.h"
-#include "as-layout.h"
/*
* Generic, controller-independent functions:
seq_putc(p, '\n');
skip:
spin_unlock_irqrestore(&irq_desc[i].lock, flags);
- } else if (i == NR_IRQS) {
+ } else if (i == NR_IRQS)
seq_putc(p, '\n');
- }
return 0;
}
while (1) {
n = os_waiting_for_events(active_fds);
if (n <= 0) {
- if(n == -EINTR) continue;
+ if (n == -EINTR)
+ continue;
else break;
}
- for (irq_fd = active_fds; irq_fd != NULL; irq_fd = irq_fd->next) {
+ for (irq_fd = active_fds; irq_fd != NULL;
+ irq_fd = irq_fd->next) {
if (irq_fd->current_events != 0) {
irq_fd->current_events = 0;
do_IRQ(irq_fd->irq, regs);
static DEFINE_SPINLOCK(irq_lock);
-int activate_fd(int irq, int fd, int type, void *dev_id)
+static int activate_fd(int irq, int fd, int type, void *dev_id)
{
struct pollfd *tmp_pfd;
struct irq_fd *new_fd, *irq_fd;
unsigned long flags;
- int pid, events, err, n;
+ int events, err, n;
- pid = os_getpid();
- err = os_set_fd_async(fd, pid);
+ err = os_set_fd_async(fd);
if (err < 0)
goto out;
if (type == IRQ_READ)
events = UM_POLLIN | UM_POLLPRI;
- else
- events = UM_POLLOUT;
+ else events = UM_POLLOUT;
*new_fd = ((struct irq_fd) { .next = NULL,
.id = dev_id,
.fd = fd,
.type = type,
.irq = irq,
- .pid = pid,
.events = events,
.current_events = 0 } );
spin_lock_irqsave(&irq_lock, flags);
for (irq_fd = active_fds; irq_fd != NULL; irq_fd = irq_fd->next) {
if ((irq_fd->fd == fd) && (irq_fd->type == type)) {
- printk("Registering fd %d twice\n", fd);
- printk("Irqs : %d, %d\n", irq_fd->irq, irq);
- printk("Ids : 0x%p, 0x%p\n", irq_fd->id, dev_id);
+ printk(KERN_ERR "Registering fd %d twice\n", fd);
+ printk(KERN_ERR "Irqs : %d, %d\n", irq_fd->irq, irq);
+ printk(KERN_ERR "Ids : 0x%p, 0x%p\n", irq_fd->id,
+ dev_id);
goto out_unlock;
}
}
if (n == 0)
break;
- /* n > 0
+ /*
+ * n > 0
* It means we couldn't put new pollfd to current pollfds
* and tmp_fds is NULL or too small for new pollfds array.
* Needed size is equal to n as minimum.
spin_unlock_irqrestore(&irq_lock, flags);
- /* This calls activate_fd, so it has to be outside the critical
+ /*
+ * This calls activate_fd, so it has to be outside the critical
* section.
*/
maybe_sigio_broken(fd, (type == IRQ_READ));
return ((irq->irq == data->irq) && (irq->id == data->dev));
}
-void free_irq_by_irq_and_dev(unsigned int irq, void *dev)
+static void free_irq_by_irq_and_dev(unsigned int irq, void *dev)
{
struct irq_and_dev data = ((struct irq_and_dev) { .irq = irq,
.dev = dev });
i++;
}
if (irq == NULL) {
- printk("find_irq_by_fd doesn't have descriptor %d\n", fd);
+ printk(KERN_ERR "find_irq_by_fd doesn't have descriptor %d\n",
+ fd);
goto out;
}
fdi = os_get_pollfd(i);
if ((fdi != -1) && (fdi != fd)) {
- printk("find_irq_by_fd - mismatch between active_fds and "
- "pollfds, fd %d vs %d, need %d\n", irq->fd,
+ printk(KERN_ERR "find_irq_by_fd - mismatch between active_fds "
+ "and pollfds, fd %d vs %d, need %d\n", irq->fd,
fdi, fd);
irq = NULL;
goto out;
spin_lock_irqsave(&irq_lock, flags);
irq = find_irq_by_fd(fd, irqnum, &i);
- if(irq == NULL){
+ if (irq == NULL) {
spin_unlock_irqrestore(&irq_lock, flags);
return;
}
}
/*
- * do_IRQ handles all normal device IRQ's (the special
+ * do_IRQ handles all normal device IRQs (the special
* SMP cross-CPU interrupts have their own specific
* handlers).
*/
{
int err;
- err = request_irq(irq, handler, irqflags, devname, dev_id);
- if (err)
- return err;
-
- if (fd != -1)
+ if (fd != -1) {
err = activate_fd(irq, fd, type, dev_id);
- return err;
+ if (err)
+ return err;
+ }
+
+ return request_irq(irq, handler, irqflags, devname, dev_id);
}
+
EXPORT_SYMBOL(um_request_irq);
EXPORT_SYMBOL(reactivate_fd);
-/* hw_interrupt_type must define (startup || enable) &&
- * (shutdown || disable) && end */
+/*
+ * hw_interrupt_type must define (startup || enable) &&
+ * (shutdown || disable) && end
+ */
static void dummy(unsigned int irq)
{
}
}
}
-int init_aio_irq(int irq, char *name, irq_handler_t handler)
-{
- int fds[2], err;
-
- err = os_pipe(fds, 1, 1);
- if (err) {
- printk("init_aio_irq - os_pipe failed, err = %d\n", -err);
- goto out;
- }
-
- err = um_request_irq(irq, fds[0], IRQ_READ, handler,
- IRQF_DISABLED | IRQF_SAMPLE_RANDOM, name,
- (void *) (long) fds[0]);
- if (err) {
- printk("init_aio_irq - : um_request_irq failed, err = %d\n",
- err);
- goto out_close;
- }
-
- err = fds[1];
- goto out;
-
- out_close:
- os_close_file(fds[0]);
- os_close_file(fds[1]);
- out:
- return err;
-}
-
/*
* IRQ stack entry and exit:
*
int nested;
mask = xchg(&pending_mask, *mask_out);
- if(mask != 0){
- /* If any interrupts come in at this point, we want to
+ if (mask != 0) {
+ /*
+ * If any interrupts come in at this point, we want to
* make sure that their bits aren't lost by our
* putting our bit in. So, this loop accumulates bits
* until xchg returns the same value that we put in.
do {
old |= mask;
mask = xchg(&pending_mask, old);
- } while(mask != old);
+ } while (mask != old);
return 1;
}
ti = current_thread_info();
nested = (ti->real_thread != NULL);
- if(!nested){
+ if (!nested) {
struct task_struct *task;
struct thread_info *tti;