#include <linux/spinlock.h>
#include <linux/cpumask.h>
#include <linux/irqreturn.h>
+#include <linux/errno.h>
#include <asm/irq.h>
#include <asm/ptrace.h>
#include <asm/irq_regs.h>
struct irq_desc;
-typedef void fastcall (*irq_flow_handler_t)(unsigned int irq,
+typedef void (*irq_flow_handler_t)(unsigned int irq,
struct irq_desc *desc);
#define IRQ_WAKEUP 0x00100000 /* IRQ triggers system wakeup */
#define IRQ_MOVE_PENDING 0x00200000 /* need to re-target IRQ destination */
#define IRQ_NO_BALANCING 0x00400000 /* IRQ is excluded from balancing */
+#define IRQ_SPURIOUS_DISABLED 0x00800000 /* IRQ was disabled by the spurious trap */
+#define IRQ_MOVE_PCNTXT 0x01000000 /* IRQ migration from process context */
#ifdef CONFIG_IRQ_PER_CPU
# define CHECK_IRQ_PER_CPU(var) ((var) & IRQ_PER_CPU)
const char *typename;
};
+struct timer_rand_state;
/**
* struct irq_desc - interrupt descriptor
*
* @wake_depth: enable depth, for multiple set_irq_wake() callers
* @irq_count: stats field to detect stalled irqs
* @irqs_unhandled: stats field for spurious unhandled interrupts
+ * @last_unhandled: aging timer for unhandled count
* @lock: locking for SMP
* @affinity: IRQ affinity on SMP
* @cpu: cpu index useful for balancing
* @dir: /proc/irq/ procfs entry
* @affinity_entry: /proc/irq/smp_affinity procfs entry on SMP
* @name: flow handler name for /proc/interrupts output
- *
- * Pad this out to 32 bytes for cache and indexing reasons.
*/
struct irq_desc {
+ unsigned int irq;
+#ifdef CONFIG_HAVE_SPARSE_IRQ
+ struct irq_desc *next;
+ struct timer_rand_state *timer_rand_state;
+#endif
+#ifdef CONFIG_HAVE_DYN_ARRAY
+ unsigned int *kstat_irqs;
+#else
+ unsigned int kstat_irqs[NR_CPUS];
+#endif
irq_flow_handler_t handle_irq;
struct irq_chip *chip;
struct msi_desc *msi_desc;
unsigned int wake_depth; /* nested wake enables */
unsigned int irq_count; /* For detecting broken IRQs */
unsigned int irqs_unhandled;
+ unsigned long last_unhandled; /* Aging timer for unhandled count */
spinlock_t lock;
#ifdef CONFIG_SMP
cpumask_t affinity;
struct proc_dir_entry *dir;
#endif
const char *name;
-} ____cacheline_aligned;
+} ____cacheline_internodealigned_in_smp;
+extern struct irq_desc *irq_to_desc(unsigned int irq);
+#ifndef CONFIG_HAVE_DYN_ARRAY
+/* could be removed if we get rid of all irq_desc reference */
extern struct irq_desc irq_desc[NR_IRQS];
+#endif
+#define kstat_irqs_this_cpu(DESC) \
+ ((DESC)->kstat_irqs[smp_processor_id()])
/*
* Migration helpers for obsolete names, they will go away:
#ifdef CONFIG_GENERIC_HARDIRQS
-#ifndef handle_dynamic_tick
-# define handle_dynamic_tick(a) do { } while (0)
-#endif
-
-#ifdef CONFIG_SMP
-static inline void set_native_irq_info(int irq, cpumask_t mask)
-{
- irq_desc[irq].affinity = mask;
-}
-#else
-static inline void set_native_irq_info(int irq, cpumask_t mask)
-{
-}
-#endif
-
#ifdef CONFIG_SMP
#if defined(CONFIG_GENERIC_PENDING_IRQ) || defined(CONFIG_IRQBALANCE)
#endif /* CONFIG_GENERIC_PENDING_IRQ */
-extern int irq_set_affinity(unsigned int irq, cpumask_t cpumask);
-extern int irq_can_set_affinity(unsigned int irq);
-
#else /* CONFIG_SMP */
#define move_native_irq(x)
#define move_masked_irq(x)
-static inline int irq_set_affinity(unsigned int irq, cpumask_t cpumask)
-{
- return -EINVAL;
-}
-
-static inline int irq_can_set_affinity(unsigned int irq) { return 0; }
-
#endif /* CONFIG_SMP */
#ifdef CONFIG_IRQBALANCE
}
#endif
-#ifdef CONFIG_AUTO_IRQ_AFFINITY
-extern int select_smp_affinity(unsigned int irq);
-#else
-static inline int select_smp_affinity(unsigned int irq)
-{
- return 1;
-}
-#endif
-
extern int no_irq_affinity;
static inline int irq_balancing_disabled(unsigned int irq)
{
- return irq_desc[irq].status & IRQ_NO_BALANCING_MASK;
+ struct irq_desc *desc;
+
+ desc = irq_to_desc(irq);
+ return desc->status & IRQ_NO_BALANCING_MASK;
}
/* Handle irq action chains: */
* Built-in IRQ handlers for various IRQ types,
* callable via desc->chip->handle_irq()
*/
-extern void fastcall handle_level_irq(unsigned int irq, struct irq_desc *desc);
-extern void fastcall handle_fasteoi_irq(unsigned int irq, struct irq_desc *desc);
-extern void fastcall handle_edge_irq(unsigned int irq, struct irq_desc *desc);
-extern void fastcall handle_simple_irq(unsigned int irq, struct irq_desc *desc);
-extern void fastcall handle_percpu_irq(unsigned int irq, struct irq_desc *desc);
-extern void fastcall handle_bad_irq(unsigned int irq, struct irq_desc *desc);
+extern void handle_level_irq(unsigned int irq, struct irq_desc *desc);
+extern void handle_fasteoi_irq(unsigned int irq, struct irq_desc *desc);
+extern void handle_edge_irq(unsigned int irq, struct irq_desc *desc);
+extern void handle_simple_irq(unsigned int irq, struct irq_desc *desc);
+extern void handle_percpu_irq(unsigned int irq, struct irq_desc *desc);
+extern void handle_bad_irq(unsigned int irq, struct irq_desc *desc);
/*
* Monolithic do_IRQ implementation.
- * (is an explicit fastcall, because i386 4KSTACKS calls it from assembly)
*/
#ifndef CONFIG_GENERIC_HARDIRQS_NO__DO_IRQ
-extern fastcall unsigned int __do_IRQ(unsigned int irq);
+extern unsigned int __do_IRQ(unsigned int irq);
#endif
/*
*/
static inline void generic_handle_irq(unsigned int irq)
{
- struct irq_desc *desc = irq_desc + irq;
+ struct irq_desc *desc = irq_to_desc(irq);
#ifdef CONFIG_GENERIC_HARDIRQS_NO__DO_IRQ
desc->handle_irq(irq, desc);
__set_irq_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained,
const char *name);
+/* caller has locked the irq_desc and both params are valid */
+static inline void __set_irq_handler_unlocked(int irq,
+ irq_flow_handler_t handler)
+{
+ struct irq_desc *desc;
+
+ desc = irq_to_desc(irq);
+ desc->handle_irq = handler;
+}
+
/*
* Set a highlevel flow handler for a given IRQ:
*/
__set_irq_handler(irq, handle, 1, NULL);
}
+extern void set_irq_noprobe(unsigned int irq);
+extern void set_irq_probe(unsigned int irq);
+
/* Handle dynamic irq creation and destruction */
extern int create_irq(void);
extern void destroy_irq(unsigned int irq);
/* Test to see if a driver has successfully requested an irq */
static inline int irq_has_action(unsigned int irq)
{
- struct irq_desc *desc = irq_desc + irq;
+ struct irq_desc *desc = irq_to_desc(irq);
return desc->action != NULL;
}
extern int set_irq_type(unsigned int irq, unsigned int type);
extern int set_irq_msi(unsigned int irq, struct msi_desc *entry);
-#define get_irq_chip(irq) (irq_desc[irq].chip)
-#define get_irq_chip_data(irq) (irq_desc[irq].chip_data)
-#define get_irq_data(irq) (irq_desc[irq].handler_data)
-#define get_irq_msi(irq) (irq_desc[irq].msi_desc)
+#define get_irq_chip(irq) (irq_to_desc(irq)->chip)
+#define get_irq_chip_data(irq) (irq_to_desc(irq)->chip_data)
+#define get_irq_data(irq) (irq_to_desc(irq)->handler_data)
+#define get_irq_msi(irq) (irq_to_desc(irq)->msi_desc)
#endif /* CONFIG_GENERIC_HARDIRQS */
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff