The patch titled
genirq: core
has been removed from the -mm tree. Its filename is
genirq-core.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
Subject: genirq: core
From: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Core genirq support: add the irq-chip and irq-flow abstractions.
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
include/linux/irq.h | 160 ++++++++++++++++++++++++++++++++++-----
kernel/irq/autoprobe.c | 9 +-
kernel/irq/handle.c | 10 ++
kernel/irq/internals.h | 6 +
kernel/irq/manage.c | 14 +++
kernel/irq/resend.c | 4
kernel/irq/spurious.c | 1
7 files changed, 182 insertions(+), 22 deletions(-)
diff -puN include/linux/irq.h~genirq-core include/linux/irq.h
--- a/include/linux/irq.h~genirq-core
+++ a/include/linux/irq.h
@@ -43,20 +43,36 @@
#define IRQ_NOPROBE 512 /* IRQ is not valid for probing */
#define IRQ_NOREQUEST 1024 /* IRQ cannot be requested */
#define IRQ_NOAUTOEN 2048 /* IRQ will not be enabled on request irq */
+#define IRQ_DELAYED_DISABLE \
+ 4096 /* IRQ disable (masking) happens delayed. */
+
+/*
+ * IRQ types, see also include/linux/interrupt.h
+ */
+#define IRQ_TYPE_NONE 0x0000 /* Default, unspecified type */
+#define IRQ_TYPE_EDGE_RISING 0x0001 /* Edge rising type */
+#define IRQ_TYPE_EDGE_FALLING 0x0002 /* Edge falling type */
+#define IRQ_TYPE_EDGE_BOTH (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING)
+#define IRQ_TYPE_LEVEL_HIGH 0x0004 /* Level high type */
+#define IRQ_TYPE_LEVEL_LOW 0x0008 /* Level low type */
+#define IRQ_TYPE_SIMPLE 0x0010 /* Simple type */
+#define IRQ_TYPE_PERCPU 0x0020 /* Per CPU type */
+#define IRQ_TYPE_PROBE 0x0040 /* Probing in progress */
+
+struct proc_dir_entry;
+
/**
- * struct hw_interrupt_type - hardware interrupt type descriptor
+ * struct irq_chip - hardware interrupt chip 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
@@ -64,33 +80,45 @@
* @set_wake: enable/disable power-management wake-on of an IRQ
*
* @release: release function solely used by UML
+ * @typename: obsoleted by name, kept as migration helper
*/
-struct hw_interrupt_type {
- const char *typename;
+struct irq_chip {
+ const char *name;
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 (*mask)(unsigned int irq);
+ void (*mask_ack)(unsigned int irq);
+ void (*unmask)(unsigned int irq);
+
void (*end)(unsigned int irq);
void (*set_affinity)(unsigned int irq, cpumask_t dest);
int (*retrigger)(unsigned int irq);
+ int (*set_type)(unsigned int irq, unsigned int flow_type);
+ int (*set_wake)(unsigned int irq, unsigned int on);
/* Currently used only by UML, might disappear one day.*/
#ifdef CONFIG_IRQ_RELEASE_METHOD
void (*release)(unsigned int irq, void *dev_id);
#endif
+ /*
+ * For compatibility, ->typename is copied into ->name.
+ * Will disappear.
+ */
+ const char *typename;
};
-typedef struct hw_interrupt_type hw_irq_controller;
-
-struct proc_dir_entry;
-
/**
* struct irq_desc - interrupt descriptor
*
- * @handler: interrupt type dependent handler functions
- * @handler_data: data for the type handlers
+ * @handle_irq: highlevel irq-events handler [if NULL, __do_IRQ()]
+ * @chip: low level interrupt hardware access
+ * @handler_data: per-IRQ data for the irq_chip methods
+ * @chip_data: platform-specific per-chip private data for the chip
+ * methods, to allow shared chip implementations
* @action: the irq action chain
* @status: status information
* @depth: disable-depth, for nested irq_disable() calls
@@ -98,6 +126,7 @@ struct proc_dir_entry;
* @irqs_unhandled: stats field for spurious unhandled interrupts
* @lock: locking for SMP
* @affinity: IRQ affinity on SMP
+ * @cpu: cpu index useful for balancing
* @pending_mask: pending rebalanced interrupts
* @move_irq: need to re-target IRQ destination
* @dir: /proc/irq/ procfs entry
@@ -106,16 +135,22 @@ struct proc_dir_entry;
* Pad this out to 32 bytes for cache and indexing reasons.
*/
struct irq_desc {
- hw_irq_controller *chip;
+ void fastcall (*handle_irq)(unsigned int irq,
+ struct irq_desc *desc,
+ struct pt_regs *regs);
+ struct irq_chip *chip;
+ void *handler_data;
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;
+ unsigned int cpu;
#endif
#if defined(CONFIG_GENERIC_PENDING_IRQ) || defined(CONFIG_IRQBALANCE)
cpumask_t pending_mask;
@@ -131,6 +166,9 @@ extern struct irq_desc irq_desc[NR_IRQS]
/*
* Migration helpers for obsolete names, they will go away:
*/
+#define hw_interrupt_type irq_chip
+typedef struct irq_chip hw_irq_controller;
+#define no_irq_type no_irq_chip
typedef struct irq_desc irq_desc_t;
/*
@@ -138,6 +176,17 @@ typedef struct irq_desc irq_desc_t;
*/
#include <asm/hw_irq.h>
+/*
+ * Architectures call this to let the generic IRQ layer
+ * handle an interrupt:
+ */
+static inline void generic_handle_irq(unsigned int irq, struct pt_regs *regs)
+{
+ struct irq_desc *desc = irq_desc + irq;
+
+ desc->handle_irq(irq, desc, regs);
+}
+
extern int setup_irq(unsigned int irq, struct irqaction *new);
#ifdef CONFIG_GENERIC_HARDIRQS
@@ -236,27 +285,100 @@ static inline int select_smp_affinity(un
#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);
+/* Handle irq action chains: */
+extern int handle_IRQ_event(unsigned int irq, struct pt_regs *regs,
+ struct irqaction *action);
+
+/*
+ * 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, struct pt_regs *regs);
+extern void fastcall
+handle_fastack_irq(unsigned int irq, struct irq_desc *desc,
+ struct pt_regs *regs);
+extern void fastcall
+handle_edge_irq(unsigned int irq, struct irq_desc *desc, struct pt_regs *regs);
+extern void fastcall
+handle_simple_irq(unsigned int irq, struct irq_desc *desc,
+ struct pt_regs *regs);
+extern void fastcall
+handle_percpu_irq(unsigned int irq, struct irq_desc *desc,
+ struct pt_regs *regs);
+extern void fastcall
+handle_bad_irq(unsigned int irq, struct irq_desc *desc, struct pt_regs *regs);
+
+/*
+ * Get a descriptive string for the highlevel handler, for
+ * /proc/interrupts output:
+ */
+extern const char *
+handle_irq_name(void fastcall (*handle)(unsigned int, struct irq_desc *,
+ struct pt_regs *));
+
/*
- * Explicit fastcall, because i386 4KSTACKS calls it from assembly:
+ * Monolithic do_IRQ implementation.
+ * (is an explicit fastcall, because i386 4KSTACKS calls it from assembly)
*/
extern fastcall unsigned int __do_IRQ(unsigned int irq, struct pt_regs *regs);
+/* Handling of unhandled and spurious interrupts: */
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);
/* Resending of interrupts :*/
void check_irq_resend(struct irq_desc *desc, unsigned int irq);
+/* Initialize /proc/irq/ */
extern void init_irq_proc(void);
-#endif /* CONFIG_GENERIC_HARDIRQS */
+/* Enable/disable irq debugging output: */
+extern int noirqdebug_setup(char *str);
+
+/* Checks whether the interrupt can be requested by request_irq(): */
+extern int can_request_irq(unsigned int irq, unsigned long irqflags);
+
+/* Dummy irq-chip implementation: */
+extern struct irq_chip no_irq_chip;
+
+extern void
+set_irq_chip_and_handler(unsigned int irq, struct irq_chip *chip,
+ void fastcall (*handle)(unsigned int,
+ struct irq_desc *,
+ struct pt_regs *));
+extern void
+__set_irq_handler(unsigned int irq,
+ void fastcall (*handle)(unsigned int, struct irq_desc *,
+ struct pt_regs *),
+ int is_chained);
-extern hw_irq_controller no_irq_type; /* needed in every arch ? */
+/*
+ * Set a highlevel flow handler for a given IRQ:
+ */
+static inline void
+set_irq_handler(unsigned int irq,
+ void fastcall (*handle)(unsigned int, struct irq_desc *,
+ struct pt_regs *))
+{
+ __set_irq_handler(irq, handle, 0);
+}
+
+/*
+ * Set a highlevel chained flow handler for a given IRQ.
+ * (a chained handler is automatically enabled and set to
+ * IRQ_NOREQUEST and IRQ_NOPROBE)
+ */
+static inline void
+set_irq_chained_handler(unsigned int irq,
+ void fastcall (*handle)(unsigned int, struct irq_desc *,
+ struct pt_regs *))
+{
+ __set_irq_handler(irq, handle, 1);
+}
+
+#endif /* CONFIG_GENERIC_HARDIRQS */
#endif /* !CONFIG_S390 */
diff -puN kernel/irq/autoprobe.c~genirq-core kernel/irq/autoprobe.c
--- a/kernel/irq/autoprobe.c~genirq-core
+++ a/kernel/irq/autoprobe.c
@@ -40,8 +40,15 @@ unsigned long probe_irq_on(void)
desc = irq_desc + i;
spin_lock_irq(&desc->lock);
- if (!desc->action && !(desc->status & IRQ_NOPROBE))
+ if (!desc->action && !(desc->status & IRQ_NOPROBE)) {
+ /*
+ * Some chips need to know about probing in
+ * progress:
+ */
+ if (desc->chip->set_type)
+ desc->chip->set_type(i, IRQ_TYPE_PROBE);
desc->chip->startup(i);
+ }
spin_unlock_irq(&desc->lock);
}
diff -puN kernel/irq/handle.c~genirq-core kernel/irq/handle.c
--- a/kernel/irq/handle.c~genirq-core
+++ a/kernel/irq/handle.c
@@ -18,6 +18,16 @@
#include "internals.h"
+/**
+ * handle_bad_irq - handle spurious and unhandled irqs
+ */
+void fastcall
+handle_bad_irq(unsigned int irq, struct irq_desc *desc, struct pt_regs *regs)
+{
+ kstat_this_cpu.irqs[irq]++;
+ ack_bad_irq(irq);
+}
+
/*
* Linux has a controller-independent interrupt architecture.
* Every controller has a 'controller-template', that is used
diff -puN kernel/irq/internals.h~genirq-core kernel/irq/internals.h
--- a/kernel/irq/internals.h~genirq-core
+++ a/kernel/irq/internals.h
@@ -4,6 +4,12 @@
extern int noirqdebug;
+/* Set default functions for irq_chip structures: */
+extern void irq_chip_set_defaults(struct irq_chip *chip);
+
+/* Set default handler: */
+extern void compat_irq_chip_set_default_handler(struct irq_desc *desc);
+
#ifdef CONFIG_PROC_FS
extern void register_irq_proc(unsigned int irq);
extern void register_handler_proc(unsigned int irq, struct irqaction *action);
diff -puN kernel/irq/manage.c~genirq-core kernel/irq/manage.c
--- a/kernel/irq/manage.c~genirq-core
+++ a/kernel/irq/manage.c
@@ -153,6 +153,17 @@ int can_request_irq(unsigned int irq, un
return !action;
}
+void compat_irq_chip_set_default_handler(struct irq_desc *desc)
+{
+ /*
+ * If the architecture still has not overriden
+ * the flow handler then zap the default. This
+ * should catch incorrect flow-type setting.
+ */
+ if (desc->handle_irq == &handle_bad_irq)
+ desc->handle_irq = NULL;
+}
+
/*
* Internal function to register an irqaction - typically used to
* allocate special interrupts that are part of the architecture.
@@ -217,6 +228,9 @@ int setup_irq(unsigned int irq, struct i
desc->status |= IRQ_PER_CPU;
#endif
if (!shared) {
+ irq_chip_set_defaults(desc->chip);
+ compat_irq_chip_set_default_handler(desc);
+
desc->status &= ~(IRQ_AUTODETECT | IRQ_WAITING |
IRQ_INPROGRESS);
diff -puN kernel/irq/resend.c~genirq-core kernel/irq/resend.c
--- a/kernel/irq/resend.c~genirq-core
+++ a/kernel/irq/resend.c
@@ -37,9 +37,9 @@ static void resend_irqs(unsigned long ar
irq = find_first_bit(irqs_resend, NR_IRQS);
clear_bit(irq, irqs_resend);
desc = irq_desc + irq;
- spin_lock_irqsave(&desc->lock, flags);
+ local_irq_disable();
desc->handle_irq(irq, desc, NULL);
- spin_unlock_irqrestore(&desc->lock, flags);
+ local_irq_enable();
}
}
diff -puN kernel/irq/spurious.c~genirq-core kernel/irq/spurious.c
--- a/kernel/irq/spurious.c~genirq-core
+++ a/kernel/irq/spurious.c
@@ -168,6 +168,7 @@ void note_interrupt(unsigned int irq, st
*/
printk(KERN_EMERG "Disabling IRQ #%d\n", irq);
desc->status |= IRQ_DISABLED;
+ desc->depth = 1;
desc->chip->disable(irq);
}
desc->irqs_unhandled = 0;
_
Patches currently in -mm which might be from tglx@xxxxxxxxxxxxx are
origin.patch
genirq-add-irq-chip-support-fasteoi-handler-handle-interrupt-disabling.patch
genirq-rename-desc-handler-to-desc-chip-ia64-fix-2.patch
git-mtd.patch
lockdep-add-disable-enable_irq_lockdep-api.patch
genirq-convert-the-x86_64-architecture-to-irq-chips.patch
genirq-convert-the-i386-architecture-to-irq-chips.patch
genirq-convert-the-i386-architecture-to-irq-chips-fix-2.patch
genirq-irq-convert-the-move_irq-flag-from-a-32bit-word-to-a-single-bit.patch
genirq-irq-add-moved_masked_irq.patch
genirq-x86_64-irq-reenable-migrating-irqs-to-other-cpus.patch
genirq-msi-simplify-msi-enable-and-disable.patch
genirq-msi-simplify-msi-enable-and-disable-fix.patch
genirq-msi-make-the-msi-boolean-tests-return-either-0-or-1.patch
genirq-msi-implement-helper-functions-read_msi_msg-and-write_msi_msg.patch
genirq-msi-refactor-the-msi_ops.patch
genirq-msi-simplify-the-msi-irq-limit-policy.patch
genirq-irq-add-a-dynamic-irq-creation-api.patch
genirq-ia64-irq-dynamic-irq-support.patch
genirq-i386-irq-dynamic-irq-support.patch
genirq-i386-irq-dynamic-irq-support-fix.patch
genirq-x86_64-irq-dynamic-irq-support.patch
genirq-msi-make-the-msi-code-irq-based-and-not-vector-based.patch
genirq-x86_64-irq-move-msi-message-composition-into-io_apicc.patch
genirq-i386-irq-move-msi-message-composition-into-io_apicc.patch
genirq-msi-only-build-msi-apicc-on-ia64.patch
genirq-x86_64-irq-remove-the-msi-assumption-that-irq-==-vector.patch
genirq-i386-irq-remove-the-msi-assumption-that-irq-==-vector.patch
genirq-i386-irq-remove-the-msi-assumption-that-irq-==-vector-fix.patch
genirq-irq-remove-msi-hacks.patch
genirq-irq-generalize-the-check-for-hardirq_bits.patch
genirq-x86_64-irq-make-the-external-irq-handlers-report-their-vector-not-the-irq-number.patch
genirq-x86_64-irq-make-vector_irq-per-cpu.patch
genirq-x86_64-irq-kill-gsi_irq_sharing.patch
genirq-x86_64-irq-kill-irq-compression.patch
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