-#ifndef __irq_h
-#define __irq_h
+#ifndef _LINUX_IRQ_H
+#define _LINUX_IRQ_H
/*
* Please do not include this file in generic code. There is currently
#include <linux/smp.h>
-#if !defined(CONFIG_S390)
+#ifndef CONFIG_S390
#include <linux/linkage.h>
#include <linux/cache.h>
#define IRQ_WAITING 32 /* IRQ not yet seen - for autodetection */
#define IRQ_LEVEL 64 /* IRQ level triggered */
#define IRQ_MASKED 128 /* IRQ masked - shouldn't be seen again */
-#if defined(ARCH_HAS_IRQ_PER_CPU)
+#ifdef CONFIG_IRQ_PER_CPU
# define IRQ_PER_CPU 256 /* IRQ is per CPU */
# define CHECK_IRQ_PER_CPU(var) ((var) & IRQ_PER_CPU)
#else
# define CHECK_IRQ_PER_CPU(var) 0
#endif
-/*
- * Interrupt controller descriptor. This is all we need
- * to describe about the low-level hardware.
+/**
+ * struct hw_interrupt_type - hardware interrupt type descriptor
+ *
+ * @name: name for /proc/interrupts
+ * @startup: start up the interrupt (defaults to ->enable if NULL)
+ * @shutdown: shut down the interrupt (defaults to ->disable if NULL)
+ * @enable: enable the interrupt (defaults to chip->unmask if NULL)
+ * @disable: disable the interrupt (defaults to chip->mask if NULL)
+ * @handle_irq: irq flow handler called from the arch IRQ glue code
+ * @ack: start of a new interrupt
+ * @mask: mask an interrupt source
+ * @mask_ack: ack and mask an interrupt source
+ * @unmask: unmask an interrupt source
+ * @hold: same interrupt while the handler is running
+ * @end: end of interrupt
+ * @set_affinity: set the CPU affinity on SMP machines
+ * @retrigger: resend an IRQ to the CPU
+ * @set_type: set the flow type (IRQ_TYPE_LEVEL/etc.) of an IRQ
+ * @set_wake: enable/disable power-management wake-on of an IRQ
+ *
+ * @release: release function solely used by UML
*/
struct hw_interrupt_type {
- const char * typename;
- unsigned int (*startup)(unsigned int irq);
- void (*shutdown)(unsigned int irq);
- void (*enable)(unsigned int irq);
- void (*disable)(unsigned int irq);
- void (*ack)(unsigned int irq);
- void (*end)(unsigned int irq);
- void (*set_affinity)(unsigned int irq, cpumask_t dest);
+ const char *typename;
+ unsigned int (*startup)(unsigned int irq);
+ void (*shutdown)(unsigned int irq);
+ void (*enable)(unsigned int irq);
+ void (*disable)(unsigned int irq);
+ void (*ack)(unsigned int irq);
+ void (*end)(unsigned int irq);
+ void (*set_affinity)(unsigned int irq, cpumask_t dest);
+ int (*retrigger)(unsigned int irq);
+
/* Currently used only by UML, might disappear one day.*/
#ifdef CONFIG_IRQ_RELEASE_METHOD
- void (*release)(unsigned int irq, void *dev_id);
+ void (*release)(unsigned int irq, void *dev_id);
#endif
};
typedef struct hw_interrupt_type hw_irq_controller;
-/*
- * This is the "IRQ descriptor", which contains various information
- * about the irq, including what kind of hardware handling it has,
- * whether it is disabled etc etc.
+struct proc_dir_entry;
+
+/**
+ * struct irq_desc - interrupt descriptor
+ *
+ * @handler: interrupt type dependent handler functions
+ * @handler_data: data for the type handlers
+ * @action: the irq action chain
+ * @status: status information
+ * @depth: disable-depth, for nested irq_disable() calls
+ * @irq_count: stats field to detect stalled irqs
+ * @irqs_unhandled: stats field for spurious unhandled interrupts
+ * @lock: locking for SMP
+ * @affinity: IRQ affinity on SMP
+ * @pending_mask: pending rebalanced interrupts
+ * @move_irq: need to re-target IRQ destination
+ * @dir: /proc/irq/ procfs entry
+ * @affinity_entry: /proc/irq/smp_affinity procfs entry on SMP
*
* Pad this out to 32 bytes for cache and indexing reasons.
*/
-typedef struct irq_desc {
- hw_irq_controller *chip;
- void *chip_data;
- struct irqaction *action; /* IRQ action list */
- unsigned int status; /* IRQ status */
- unsigned int depth; /* nested irq disables */
- unsigned int irq_count; /* For detecting broken interrupts */
- unsigned int irqs_unhandled;
- spinlock_t lock;
+struct irq_desc {
+ hw_irq_controller *chip;
+ void *chip_data;
+ struct irqaction *action; /* IRQ action list */
+ unsigned int status; /* IRQ status */
+ unsigned int depth; /* nested irq disables */
+ unsigned int irq_count; /* For detecting broken IRQs */
+ unsigned int irqs_unhandled;
+ spinlock_t lock;
#ifdef CONFIG_SMP
- cpumask_t affinity;
+ cpumask_t affinity;
#endif
-#if defined (CONFIG_GENERIC_PENDING_IRQ) || defined (CONFIG_IRQBALANCE)
- unsigned int move_irq; /* Flag need to re-target intr dest*/
+#if defined(CONFIG_GENERIC_PENDING_IRQ) || defined(CONFIG_IRQBALANCE)
+ cpumask_t pending_mask;
+ unsigned int move_irq; /* need to re-target IRQ dest */
#endif
-} ____cacheline_aligned irq_desc_t;
+#ifdef CONFIG_PROC_FS
+ struct proc_dir_entry *dir;
+#endif
+} ____cacheline_aligned;
-extern irq_desc_t irq_desc [NR_IRQS];
+extern struct irq_desc irq_desc[NR_IRQS];
-/* Return a pointer to the irq descriptor for IRQ. */
-static inline irq_desc_t *
-irq_descp (int irq)
-{
- return irq_desc + irq;
-}
+/*
+ * Migration helpers for obsolete names, they will go away:
+ */
+typedef struct irq_desc irq_desc_t;
-#include <asm/hw_irq.h> /* the arch dependent stuff */
+/*
+ * Pick up the arch-dependent methods:
+ */
+#include <asm/hw_irq.h>
-extern int setup_irq(unsigned int irq, struct irqaction * new);
+extern int setup_irq(unsigned int irq, struct irqaction *new);
#ifdef CONFIG_GENERIC_HARDIRQS
+
#ifdef CONFIG_SMP
static inline void set_native_irq_info(int irq, cpumask_t mask)
{
#ifdef CONFIG_SMP
-#if defined (CONFIG_GENERIC_PENDING_IRQ) || defined (CONFIG_IRQBALANCE)
-extern cpumask_t pending_irq_cpumask[NR_IRQS];
+#if defined(CONFIG_GENERIC_PENDING_IRQ) || defined(CONFIG_IRQBALANCE)
void set_pending_irq(unsigned int irq, cpumask_t mask);
void move_native_irq(int irq);
{
}
-#else // CONFIG_PCI_MSI
+#else /* CONFIG_PCI_MSI */
static inline void move_irq(int irq)
{
{
set_native_irq_info(irq, mask);
}
-#endif // CONFIG_PCI_MSI
-#else // CONFIG_GENERIC_PENDING_IRQ || CONFIG_IRQBALANCE
+#endif /* CONFIG_PCI_MSI */
+
+#else /* CONFIG_GENERIC_PENDING_IRQ || CONFIG_IRQBALANCE */
+
+static inline void move_irq(int irq)
+{
+}
+
+static inline void move_native_irq(int irq)
+{
+}
+
+static inline void set_pending_irq(unsigned int irq, cpumask_t mask)
+{
+}
-#define move_irq(x)
-#define move_native_irq(x)
-#define set_pending_irq(x,y)
static inline void set_irq_info(int irq, cpumask_t mask)
{
set_native_irq_info(irq, mask);
}
-#endif // CONFIG_GENERIC_PENDING_IRQ
+#endif /* CONFIG_GENERIC_PENDING_IRQ */
-#else // CONFIG_SMP
+#else /* CONFIG_SMP */
#define move_irq(x)
#define move_native_irq(x)
-#endif // CONFIG_SMP
+#endif /* CONFIG_SMP */
#ifdef CONFIG_IRQBALANCE
extern void set_balance_irq_affinity(unsigned int irq, cpumask_t mask);
}
#endif
-extern int no_irq_affinity;
-extern int noirqdebug_setup(char *str);
-
-extern fastcall irqreturn_t handle_IRQ_event(unsigned int irq, struct pt_regs *regs,
- struct irqaction *action);
-extern fastcall unsigned int __do_IRQ(unsigned int irq, struct pt_regs *regs);
-extern void note_interrupt(unsigned int irq, irq_desc_t *desc,
- int action_ret, struct pt_regs *regs);
-extern int can_request_irq(unsigned int irq, unsigned long irqflags);
-
-extern void init_irq_proc(void);
-
#ifdef CONFIG_AUTO_IRQ_AFFINITY
extern int select_smp_affinity(unsigned int irq);
#else
-static inline int
-select_smp_affinity(unsigned int irq)
+static inline int select_smp_affinity(unsigned int irq)
{
return 1;
}
#endif
-#endif
+extern int no_irq_affinity;
+extern int noirqdebug_setup(char *str);
+
+extern irqreturn_t handle_IRQ_event(unsigned int irq, struct pt_regs *regs,
+ struct irqaction *action);
+/*
+ * Explicit fastcall, because i386 4KSTACKS calls it from assembly:
+ */
+extern fastcall unsigned int __do_IRQ(unsigned int irq, struct pt_regs *regs);
+
+extern void note_interrupt(unsigned int irq, struct irq_desc *desc,
+ int action_ret, struct pt_regs *regs);
+extern int can_request_irq(unsigned int irq, unsigned long irqflags);
+
+extern void init_irq_proc(void);
+
+#endif /* CONFIG_GENERIC_HARDIRQS */
extern hw_irq_controller no_irq_type; /* needed in every arch ? */
-#endif
+#endif /* !CONFIG_S390 */
-#endif /* __irq_h */
+#endif /* _LINUX_IRQ_H */
projects / linux-2.6 / blobdiff