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authorIngo Molnar <mingo@elte.hu>2008-10-02 10:21:26 +0200
committerIngo Molnar <mingo@elte.hu>2008-10-02 10:21:26 +0200
commitd6d5aeb661fc14655c417f3582ae7ec52985d2a8 (patch)
tree5e168da05cb28d10b5accc74718428cfd5527201 /kernel/irq
parent7e6e178ab1548c8d894a77593e757acf4510b8ba (diff)
parent94aca1dac6f6d21f4b07e4864baf7768cabcc6e7 (diff)
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Merge commit 'v2.6.27-rc8' into genirq
Diffstat (limited to 'kernel/irq')
-rw-r--r--kernel/irq/chip.c12
-rw-r--r--kernel/irq/manage.c111
-rw-r--r--kernel/irq/proc.c96
3 files changed, 127 insertions, 92 deletions
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index 240c64d59267..d663338cb4a8 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -28,8 +28,7 @@ void dynamic_irq_init(unsigned int irq)
unsigned long flags;
if (irq >= NR_IRQS) {
- printk(KERN_ERR "Trying to initialize invalid IRQ%d\n", irq);
- WARN_ON(1);
+ WARN(1, KERN_ERR "Trying to initialize invalid IRQ%d\n", irq);
return;
}
@@ -62,8 +61,7 @@ void dynamic_irq_cleanup(unsigned int irq)
unsigned long flags;
if (irq >= NR_IRQS) {
- printk(KERN_ERR "Trying to cleanup invalid IRQ%d\n", irq);
- WARN_ON(1);
+ WARN(1, KERN_ERR "Trying to cleanup invalid IRQ%d\n", irq);
return;
}
@@ -71,9 +69,8 @@ void dynamic_irq_cleanup(unsigned int irq)
spin_lock_irqsave(&desc->lock, flags);
if (desc->action) {
spin_unlock_irqrestore(&desc->lock, flags);
- printk(KERN_ERR "Destroying IRQ%d without calling free_irq\n",
+ WARN(1, KERN_ERR "Destroying IRQ%d without calling free_irq\n",
irq);
- WARN_ON(1);
return;
}
desc->msi_desc = NULL;
@@ -96,8 +93,7 @@ int set_irq_chip(unsigned int irq, struct irq_chip *chip)
unsigned long flags;
if (irq >= NR_IRQS) {
- printk(KERN_ERR "Trying to install chip for IRQ%d\n", irq);
- WARN_ON(1);
+ WARN(1, KERN_ERR "Trying to install chip for IRQ%d\n", irq);
return -EINVAL;
}
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 9aa3e7b81389..d62f69ba7453 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -177,8 +177,7 @@ static void __enable_irq(struct irq_desc *desc, unsigned int irq)
{
switch (desc->depth) {
case 0:
- printk(KERN_WARNING "Unbalanced enable for IRQ %d\n", irq);
- WARN_ON(1);
+ WARN(1, KERN_WARNING "Unbalanced enable for IRQ %d\n", irq);
break;
case 1: {
unsigned int status = desc->status & ~IRQ_DISABLED;
@@ -217,6 +216,17 @@ void enable_irq(unsigned int irq)
}
EXPORT_SYMBOL(enable_irq);
+int set_irq_wake_real(unsigned int irq, unsigned int on)
+{
+ struct irq_desc *desc = irq_desc + irq;
+ int ret = -ENXIO;
+
+ if (desc->chip->set_wake)
+ ret = desc->chip->set_wake(irq, on);
+
+ return ret;
+}
+
/**
* set_irq_wake - control irq power management wakeup
* @irq: interrupt to control
@@ -233,30 +243,32 @@ int set_irq_wake(unsigned int irq, unsigned int on)
{
struct irq_desc *desc = irq_desc + irq;
unsigned long flags;
- int ret = -ENXIO;
- int (*set_wake)(unsigned, unsigned) = desc->chip->set_wake;
+ int ret = 0;
/* wakeup-capable irqs can be shared between drivers that
* don't need to have the same sleep mode behaviors.
*/
spin_lock_irqsave(&desc->lock, flags);
if (on) {
- if (desc->wake_depth++ == 0)
- desc->status |= IRQ_WAKEUP;
- else
- set_wake = NULL;
+ if (desc->wake_depth++ == 0) {
+ ret = set_irq_wake_real(irq, on);
+ if (ret)
+ desc->wake_depth = 0;
+ else
+ desc->status |= IRQ_WAKEUP;
+ }
} else {
if (desc->wake_depth == 0) {
- printk(KERN_WARNING "Unbalanced IRQ %d "
- "wake disable\n", irq);
- WARN_ON(1);
- } else if (--desc->wake_depth == 0)
- desc->status &= ~IRQ_WAKEUP;
- else
- set_wake = NULL;
+ WARN(1, "Unbalanced IRQ %d wake disable\n", irq);
+ } else if (--desc->wake_depth == 0) {
+ ret = set_irq_wake_real(irq, on);
+ if (ret)
+ desc->wake_depth = 1;
+ else
+ desc->status &= ~IRQ_WAKEUP;
+ }
}
- if (set_wake)
- ret = desc->chip->set_wake(irq, on);
+
spin_unlock_irqrestore(&desc->lock, flags);
return ret;
}
@@ -293,6 +305,31 @@ void compat_irq_chip_set_default_handler(struct irq_desc *desc)
desc->handle_irq = NULL;
}
+static int __irq_set_trigger(struct irq_chip *chip, unsigned int irq,
+ unsigned long flags)
+{
+ int ret;
+
+ if (!chip || !chip->set_type) {
+ /*
+ * IRQF_TRIGGER_* but the PIC does not support multiple
+ * flow-types?
+ */
+ pr_warning("No set_type function for IRQ %d (%s)\n", irq,
+ chip ? (chip->name ? : "unknown") : "unknown");
+ return 0;
+ }
+
+ ret = chip->set_type(irq, flags & IRQF_TRIGGER_MASK);
+
+ if (ret)
+ pr_err("setting trigger mode %d for irq %u failed (%pF)\n",
+ (int)(flags & IRQF_TRIGGER_MASK),
+ irq, chip->set_type);
+
+ return ret;
+}
+
/*
* Internal function to register an irqaction - typically used to
* allocate special interrupts that are part of the architecture.
@@ -304,6 +341,7 @@ int setup_irq(unsigned int irq, struct irqaction *new)
const char *old_name = NULL;
unsigned long flags;
int shared = 0;
+ int ret;
if (irq >= NR_IRQS)
return -EINVAL;
@@ -361,35 +399,23 @@ int setup_irq(unsigned int irq, struct irqaction *new)
shared = 1;
}
- *p = new;
-
- /* Exclude IRQ from balancing */
- if (new->flags & IRQF_NOBALANCING)
- desc->status |= IRQ_NO_BALANCING;
-
if (!shared) {
irq_chip_set_defaults(desc->chip);
-#if defined(CONFIG_IRQ_PER_CPU)
- if (new->flags & IRQF_PERCPU)
- desc->status |= IRQ_PER_CPU;
-#endif
-
/* Setup the type (level, edge polarity) if configured: */
if (new->flags & IRQF_TRIGGER_MASK) {
- if (desc->chip->set_type)
- desc->chip->set_type(irq,
- new->flags & IRQF_TRIGGER_MASK);
- else
- /*
- * IRQF_TRIGGER_* but the PIC does not support
- * multiple flow-types?
- */
- printk(KERN_WARNING "No IRQF_TRIGGER set_type "
- "function for IRQ %d (%s)\n", irq,
- desc->chip->name);
+ ret = __irq_set_trigger(desc->chip, irq, new->flags);
+
+ if (ret) {
+ spin_unlock_irqrestore(&desc->lock, flags);
+ return ret;
+ }
} else
compat_irq_chip_set_default_handler(desc);
+#if defined(CONFIG_IRQ_PER_CPU)
+ if (new->flags & IRQF_PERCPU)
+ desc->status |= IRQ_PER_CPU;
+#endif
desc->status &= ~(IRQ_AUTODETECT | IRQ_WAITING |
IRQ_INPROGRESS | IRQ_SPURIOUS_DISABLED);
@@ -405,6 +431,13 @@ int setup_irq(unsigned int irq, struct irqaction *new)
/* Set default affinity mask once everything is setup */
irq_select_affinity(irq);
}
+
+ *p = new;
+
+ /* Exclude IRQ from balancing */
+ if (new->flags & IRQF_NOBALANCING)
+ desc->status |= IRQ_NO_BALANCING;
+
/* Reset broken irq detection when installing new handler */
desc->irq_count = 0;
desc->irqs_unhandled = 0;
diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c
index 6c6d35d68ee9..a09dd29c2fd7 100644
--- a/kernel/irq/proc.c
+++ b/kernel/irq/proc.c
@@ -8,6 +8,7 @@
#include <linux/irq.h>
#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
#include <linux/interrupt.h>
#include "internals.h"
@@ -16,23 +17,18 @@ static struct proc_dir_entry *root_irq_dir;
#ifdef CONFIG_SMP
-static int irq_affinity_read_proc(char *page, char **start, off_t off,
- int count, int *eof, void *data)
+static int irq_affinity_proc_show(struct seq_file *m, void *v)
{
- struct irq_desc *desc = irq_desc + (long)data;
+ struct irq_desc *desc = irq_desc + (long)m->private;
cpumask_t *mask = &desc->affinity;
- int len;
#ifdef CONFIG_GENERIC_PENDING_IRQ
if (desc->status & IRQ_MOVE_PENDING)
mask = &desc->pending_mask;
#endif
- len = cpumask_scnprintf(page, count, *mask);
-
- if (count - len < 2)
- return -EINVAL;
- len += sprintf(page + len, "\n");
- return len;
+ seq_cpumask(m, mask);
+ seq_putc(m, '\n');
+ return 0;
}
#ifndef is_affinity_mask_valid
@@ -40,11 +36,12 @@ static int irq_affinity_read_proc(char *page, char **start, off_t off,
#endif
int no_irq_affinity;
-static int irq_affinity_write_proc(struct file *file, const char __user *buffer,
- unsigned long count, void *data)
+static ssize_t irq_affinity_proc_write(struct file *file,
+ const char __user *buffer, size_t count, loff_t *pos)
{
- unsigned int irq = (int)(long)data, full_count = count, err;
+ unsigned int irq = (int)(long)PDE(file->f_path.dentry->d_inode)->data;
cpumask_t new_value;
+ int err;
if (!irq_desc[irq].chip->set_affinity || no_irq_affinity ||
irq_balancing_disabled(irq))
@@ -65,28 +62,38 @@ static int irq_affinity_write_proc(struct file *file, const char __user *buffer,
if (!cpus_intersects(new_value, cpu_online_map))
/* Special case for empty set - allow the architecture
code to set default SMP affinity. */
- return irq_select_affinity(irq) ? -EINVAL : full_count;
+ return irq_select_affinity(irq) ? -EINVAL : count;
irq_set_affinity(irq, new_value);
- return full_count;
+ return count;
}
-static int default_affinity_read(char *page, char **start, off_t off,
- int count, int *eof, void *data)
+static int irq_affinity_proc_open(struct inode *inode, struct file *file)
{
- int len = cpumask_scnprintf(page, count, irq_default_affinity);
- if (count - len < 2)
- return -EINVAL;
- len += sprintf(page + len, "\n");
- return len;
+ return single_open(file, irq_affinity_proc_show, PDE(inode)->data);
}
-static int default_affinity_write(struct file *file, const char __user *buffer,
- unsigned long count, void *data)
+static const struct file_operations irq_affinity_proc_fops = {
+ .open = irq_affinity_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+ .write = irq_affinity_proc_write,
+};
+
+static int default_affinity_show(struct seq_file *m, void *v)
+{
+ seq_cpumask(m, &irq_default_affinity);
+ seq_putc(m, '\n');
+ return 0;
+}
+
+static ssize_t default_affinity_write(struct file *file,
+ const char __user *buffer, size_t count, loff_t *ppos)
{
- unsigned int full_count = count, err;
cpumask_t new_value;
+ int err;
err = cpumask_parse_user(buffer, count, new_value);
if (err)
@@ -105,8 +112,21 @@ static int default_affinity_write(struct file *file, const char __user *buffer,
irq_default_affinity = new_value;
- return full_count;
+ return count;
}
+
+static int default_affinity_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, default_affinity_show, NULL);
+}
+
+static const struct file_operations default_affinity_proc_fops = {
+ .open = default_affinity_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+ .write = default_affinity_write,
+};
#endif
static int irq_spurious_read(char *page, char **start, off_t off,
@@ -178,16 +198,9 @@ void register_irq_proc(unsigned int irq)
irq_desc[irq].dir = proc_mkdir(name, root_irq_dir);
#ifdef CONFIG_SMP
- {
- /* create /proc/irq/<irq>/smp_affinity */
- entry = create_proc_entry("smp_affinity", 0600, irq_desc[irq].dir);
-
- if (entry) {
- entry->data = (void *)(long)irq;
- entry->read_proc = irq_affinity_read_proc;
- entry->write_proc = irq_affinity_write_proc;
- }
- }
+ /* create /proc/irq/<irq>/smp_affinity */
+ proc_create_data("smp_affinity", 0600, irq_desc[irq].dir,
+ &irq_affinity_proc_fops, (void *)(long)irq);
#endif
entry = create_proc_entry("spurious", 0444, irq_desc[irq].dir);
@@ -208,15 +221,8 @@ void unregister_handler_proc(unsigned int irq, struct irqaction *action)
void register_default_affinity_proc(void)
{
#ifdef CONFIG_SMP
- struct proc_dir_entry *entry;
-
- /* create /proc/irq/default_smp_affinity */
- entry = create_proc_entry("default_smp_affinity", 0600, root_irq_dir);
- if (entry) {
- entry->data = NULL;
- entry->read_proc = default_affinity_read;
- entry->write_proc = default_affinity_write;
- }
+ proc_create("irq/default_smp_affinity", 0600, NULL,
+ &default_affinity_proc_fops);
#endif
}