The patch titled
genirq: convert the x86_64 architecture to irq-chips
has been added to the -mm tree. Its filename is
genirq-convert-the-x86_64-architecture-to-irq-chips.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: genirq: convert the x86_64 architecture to irq-chips
From: Ingo Molnar <mingo@xxxxxxx>
This patch converts all the x86_64 PIC controllers layers to the new and
simpler irq-chip interrupt handling layer.
Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
arch/x86_64/kernel/i8259.c | 50 ++--------
arch/x86_64/kernel/io_apic.c | 159 +++++++--------------------------
arch/x86_64/kernel/irq.c | 6 -
include/asm-x86_64/hw_irq.h | 2
4 files changed, 55 insertions(+), 162 deletions(-)
diff -puN arch/x86_64/kernel/i8259.c~genirq-convert-the-x86_64-architecture-to-irq-chips arch/x86_64/kernel/i8259.c
--- devel/arch/x86_64/kernel/i8259.c~genirq-convert-the-x86_64-architecture-to-irq-chips 2006-05-22 15:15:51.000000000 -0700
+++ devel-akpm/arch/x86_64/kernel/i8259.c 2006-05-22 15:15:51.000000000 -0700
@@ -127,46 +127,21 @@ void (*interrupt[NR_IRQS])(void) = {
* moves to arch independent land
*/
-DEFINE_SPINLOCK(i8259A_lock);
-
-static void end_8259A_irq (unsigned int irq)
-{
- if (irq > 256) {
- char var;
- printk("return %p stack %p ti %p\n", __builtin_return_address(0), &var, task_thread_info(current));
-
- BUG();
- }
-
- if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)) &&
- irq_desc[irq].action)
- enable_8259A_irq(irq);
-}
-
-#define shutdown_8259A_irq disable_8259A_irq
-
static void mask_and_ack_8259A(unsigned int);
-static unsigned int startup_8259A_irq(unsigned int irq)
-{
- enable_8259A_irq(irq);
- return 0; /* never anything pending */
-}
-
-static struct hw_interrupt_type i8259A_irq_type = {
- .typename = "XT-PIC",
- .startup = startup_8259A_irq,
- .shutdown = shutdown_8259A_irq,
- .enable = enable_8259A_irq,
- .disable = disable_8259A_irq,
- .ack = mask_and_ack_8259A,
- .end = end_8259A_irq,
+static struct irq_chip i8259A_chip = {
+ .name = "XT-PIC",
+ .mask = disable_8259A_irq,
+ .unmask = enable_8259A_irq,
+ .mask_ack = mask_and_ack_8259A,
};
/*
* 8259A PIC functions to handle ISA devices:
*/
+DEFINE_SPINLOCK(i8259A_lock);
+
/*
* This contains the irq mask for both 8259A irq controllers,
*/
@@ -235,7 +210,7 @@ void make_8259A_irq(unsigned int irq)
{
disable_irq_nosync(irq);
io_apic_irqs &= ~(1<<irq);
- irq_desc[irq].chip = &i8259A_irq_type;
+ set_irq_chip_and_handler(irq, &i8259A_chip, handle_level_irq);
enable_irq(irq);
}
@@ -369,9 +344,9 @@ void init_8259A(int auto_eoi)
* in AEOI mode we just have to mask the interrupt
* when acking.
*/
- i8259A_irq_type.ack = disable_8259A_irq;
+ i8259A_chip.mask_ack = disable_8259A_irq;
else
- i8259A_irq_type.ack = mask_and_ack_8259A;
+ i8259A_chip.mask_ack = mask_and_ack_8259A;
udelay(100); /* wait for 8259A to initialize */
@@ -468,12 +443,13 @@ void __init init_ISA_irqs (void)
/*
* 16 old-style INTA-cycle interrupts:
*/
- irq_desc[i].chip = &i8259A_irq_type;
+ set_irq_chip_and_handler(i, &i8259A_chip,
+ handle_level_irq);
} else {
/*
* 'high' PCI IRQs filled in on demand
*/
- irq_desc[i].chip = &no_irq_type;
+ irq_desc[i].chip = &no_irq_chip;
}
}
}
diff -puN arch/x86_64/kernel/io_apic.c~genirq-convert-the-x86_64-architecture-to-irq-chips arch/x86_64/kernel/io_apic.c
--- devel/arch/x86_64/kernel/io_apic.c~genirq-convert-the-x86_64-architecture-to-irq-chips 2006-05-22 15:15:51.000000000 -0700
+++ devel-akpm/arch/x86_64/kernel/io_apic.c 2006-05-22 15:15:51.000000000 -0700
@@ -849,8 +849,8 @@ next:
}
extern void (*interrupt[NR_IRQS])(void);
-static struct hw_interrupt_type ioapic_level_type;
-static struct hw_interrupt_type ioapic_edge_type;
+
+static struct irq_chip ioapic_chip;
#define IOAPIC_AUTO -1
#define IOAPIC_EDGE 0
@@ -864,9 +864,11 @@ static void ioapic_register_intr(int irq
if ((trigger == IOAPIC_AUTO && IO_APIC_irq_trigger(irq)) ||
trigger == IOAPIC_LEVEL)
- irq_desc[idx].chip = &ioapic_level_type;
+ set_irq_chip_and_handler(idx, &ioapic_chip,
+ handle_fastack_irq);
else
- irq_desc[idx].chip = &ioapic_edge_type;
+ set_irq_chip_and_handler(idx, &ioapic_chip,
+ handle_edge_irq);
set_intr_gate(vector, interrupt[idx]);
}
@@ -968,7 +970,7 @@ static void __init setup_ExtINT_IRQ0_pin
* The timer IRQ doesn't have to know that behind the
* scene we have a 8259A-master in AEOI mode ...
*/
- irq_desc[0].chip = &ioapic_edge_type;
+ set_irq_chip_and_handler(0, &ioapic_chip, handle_fastack_irq);
/*
* Add it to the IO-APIC irq-routing table:
@@ -1483,7 +1485,7 @@ static int __init timer_irq_works(void)
* an edge even if it isn't on the 8259A...
*/
-static unsigned int startup_edge_ioapic_irq(unsigned int irq)
+static unsigned int startup_ioapic_irq(unsigned int irq)
{
int was_pending = 0;
unsigned long flags;
@@ -1500,86 +1502,21 @@ static unsigned int startup_edge_ioapic_
return was_pending;
}
-/*
- * Once we have recorded IRQ_PENDING already, we can mask the
- * interrupt for real. This prevents IRQ storms from unhandled
- * devices.
- */
-static void ack_edge_ioapic_irq(unsigned int irq)
-{
- move_irq(irq);
- if ((irq_desc[irq].status & (IRQ_PENDING | IRQ_DISABLED))
- == (IRQ_PENDING | IRQ_DISABLED))
- mask_IO_APIC_irq(irq);
- ack_APIC_irq();
-}
-
-/*
- * Level triggered interrupts can just be masked,
- * and shutting down and starting up the interrupt
- * is the same as enabling and disabling them -- except
- * with a startup need to return a "was pending" value.
- *
- * Level triggered interrupts are special because we
- * do not touch any IO-APIC register while handling
- * them. We ack the APIC in the end-IRQ handler, not
- * in the start-IRQ-handler. Protection against reentrance
- * from the same interrupt is still provided, both by the
- * generic IRQ layer and by the fact that an unacked local
- * APIC does not accept IRQs.
- */
-static unsigned int startup_level_ioapic_irq (unsigned int irq)
-{
- unmask_IO_APIC_irq(irq);
-
- return 0; /* don't check for pending */
-}
-
-static void end_level_ioapic_irq (unsigned int irq)
-{
- move_irq(irq);
- ack_APIC_irq();
-}
-
-#ifdef CONFIG_PCI_MSI
-static unsigned int startup_edge_ioapic_vector(unsigned int vector)
+static unsigned int startup_ioapic_vector(unsigned int vector)
{
int irq = vector_to_irq(vector);
- return startup_edge_ioapic_irq(irq);
+ return startup_ioapic_irq(irq);
}
-static void ack_edge_ioapic_vector(unsigned int vector)
-{
- int irq = vector_to_irq(vector);
-
- move_native_irq(vector);
- ack_edge_ioapic_irq(irq);
-}
-
-static unsigned int startup_level_ioapic_vector (unsigned int vector)
-{
- int irq = vector_to_irq(vector);
-
- return startup_level_ioapic_irq (irq);
-}
-
-static void end_level_ioapic_vector (unsigned int vector)
-{
- int irq = vector_to_irq(vector);
-
- move_native_irq(vector);
- end_level_ioapic_irq(irq);
-}
-
-static void mask_IO_APIC_vector (unsigned int vector)
+static void mask_ioapic_vector (unsigned int vector)
{
int irq = vector_to_irq(vector);
mask_IO_APIC_irq(irq);
}
-static void unmask_IO_APIC_vector (unsigned int vector)
+static void unmask_ioapic_vector (unsigned int vector)
{
int irq = vector_to_irq(vector);
@@ -1596,10 +1533,11 @@ static void set_ioapic_affinity_vector (
set_ioapic_affinity_irq(irq, cpu_mask);
}
#endif // CONFIG_SMP
-#endif // CONFIG_PCI_MSI
-static int ioapic_retrigger(unsigned int irq)
+static int ioapic_retrigger_vector(unsigned int vector)
{
+ int irq = vector_to_irq(vector);
+
send_IPI_self(IO_APIC_VECTOR(irq));
return 1;
@@ -1614,32 +1552,21 @@ static int ioapic_retrigger(unsigned int
* races.
*/
-static struct hw_interrupt_type ioapic_edge_type __read_mostly = {
- .typename = "IO-APIC-edge",
- .startup = startup_edge_ioapic,
- .shutdown = shutdown_edge_ioapic,
- .enable = enable_edge_ioapic,
- .disable = disable_edge_ioapic,
- .ack = ack_edge_ioapic,
- .end = end_edge_ioapic,
-#ifdef CONFIG_SMP
- .set_affinity = set_ioapic_affinity,
-#endif
- .retrigger = ioapic_retrigger,
-};
+static void ack_apic(unsigned int vector)
+{
+ ack_APIC_irq();
+}
-static struct hw_interrupt_type ioapic_level_type __read_mostly = {
- .typename = "IO-APIC-level",
- .startup = startup_level_ioapic,
- .shutdown = shutdown_level_ioapic,
- .enable = enable_level_ioapic,
- .disable = disable_level_ioapic,
- .ack = mask_and_ack_level_ioapic,
- .end = end_level_ioapic,
+static struct irq_chip ioapic_chip __read_mostly = {
+ .name = "IO-APIC",
+ .startup = startup_ioapic_vector,
+ .mask = mask_ioapic_vector,
+ .unmask = unmask_ioapic_vector,
+ .ack = ack_apic,
#ifdef CONFIG_SMP
- .set_affinity = set_ioapic_affinity,
+ .set_affinity = set_ioapic_affinity_vector,
#endif
- .retrigger = ioapic_retrigger,
+ .retrigger = ioapic_retrigger_vector,
};
static inline void init_IO_APIC_traps(void)
@@ -1674,42 +1601,32 @@ static inline void init_IO_APIC_traps(vo
make_8259A_irq(irq);
else
/* Strange. Oh, well.. */
- irq_desc[irq].chip = &no_irq_type;
+ irq_desc[irq].chip = &no_irq_chip;
}
}
}
-static void enable_lapic_irq (unsigned int irq)
+static void mask_lapic_irq (unsigned int irq)
{
unsigned long v;
v = apic_read(APIC_LVT0);
- apic_write(APIC_LVT0, v & ~APIC_LVT_MASKED);
+ apic_write(APIC_LVT0, v | APIC_LVT_MASKED);
}
-static void disable_lapic_irq (unsigned int irq)
+static void unmask_lapic_irq (unsigned int irq)
{
unsigned long v;
v = apic_read(APIC_LVT0);
- apic_write(APIC_LVT0, v | APIC_LVT_MASKED);
-}
-
-static void ack_lapic_irq (unsigned int irq)
-{
- ack_APIC_irq();
+ apic_write(APIC_LVT0, v & ~APIC_LVT_MASKED);
}
-static void end_lapic_irq (unsigned int i) { /* nothing */ }
-
-static struct hw_interrupt_type lapic_irq_type __read_mostly = {
- .typename = "local-APIC-edge",
- .startup = NULL, /* startup_irq() not used for IRQ0 */
- .shutdown = NULL, /* shutdown_irq() not used for IRQ0 */
- .enable = enable_lapic_irq,
- .disable = disable_lapic_irq,
- .ack = ack_lapic_irq,
- .end = end_lapic_irq,
+static struct irq_chip lapic_chip __read_mostly = {
+ .name = "local-APIC-edge",
+ .mask = mask_lapic_irq,
+ .unmask = unmask_lapic_irq,
+ .ack = ack_apic,
};
static void setup_nmi (void)
@@ -1891,7 +1808,7 @@ static inline void check_timer(void)
apic_printk(APIC_VERBOSE, KERN_INFO "...trying to set up timer as Virtual Wire IRQ...");
disable_8259A_irq(0);
- irq_desc[0].chip = &lapic_irq_type;
+ set_irq_chip_and_handler(0, &lapic_chip, handle_fastack_irq);
apic_write(APIC_LVT0, APIC_DM_FIXED | vector); /* Fixed mode */
enable_8259A_irq(0);
diff -puN arch/x86_64/kernel/irq.c~genirq-convert-the-x86_64-architecture-to-irq-chips arch/x86_64/kernel/irq.c
--- devel/arch/x86_64/kernel/irq.c~genirq-convert-the-x86_64-architecture-to-irq-chips 2006-05-22 15:15:51.000000000 -0700
+++ devel-akpm/arch/x86_64/kernel/irq.c 2006-05-22 15:15:51.000000000 -0700
@@ -55,7 +55,8 @@ int show_interrupts(struct seq_file *p,
for_each_online_cpu(j)
seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
#endif
- seq_printf(p, " %14s", irq_desc[i].chip->typename);
+ seq_printf(p, " %8s", irq_desc[i].chip->name);
+ seq_printf(p, "-%s", handle_irq_name(irq_desc[i].handle_irq));
seq_printf(p, " %s", action->name);
for (action=action->next; action; action = action->next)
@@ -97,7 +98,8 @@ asmlinkage unsigned int do_IRQ(struct pt
exit_idle();
irq_enter();
- __do_IRQ(irq, regs);
+ generic_handle_irq(irq, regs);
+
irq_exit();
return 1;
diff -puN include/asm-x86_64/hw_irq.h~genirq-convert-the-x86_64-architecture-to-irq-chips include/asm-x86_64/hw_irq.h
--- devel/include/asm-x86_64/hw_irq.h~genirq-convert-the-x86_64-architecture-to-irq-chips 2006-05-22 15:15:51.000000000 -0700
+++ devel-akpm/include/asm-x86_64/hw_irq.h 2006-05-22 15:15:51.000000000 -0700
@@ -19,8 +19,6 @@
#include <asm/irq.h>
#include <linux/profile.h>
#include <linux/smp.h>
-
-struct hw_interrupt_type;
#endif
#define NMI_VECTOR 0x02
_
Patches currently in -mm which might be from mingo@xxxxxxx are
git-acpi.patch
fix-drivers-mfd-ucb1x00-corec-irq-probing-bug.patch
git-dvb.patch
git-netdev-all.patch
fix-for-serial-uart-lockup.patch
qla2xxx-lock-ordering-fix.patch
qla2xxx-lock-ordering-fix-warning-fix.patch
swapless-pm-add-r-w-migration-entries-fix.patch
i386-break-out-of-recursion-in-stackframe-walk.patch
work-around-ppc64-bootup-bug-by-making-mutex-debugging-save-restore-irqs.patch
kernel-kernel-cpuc-to-mutexes.patch
cond-resched-might-sleep-fix.patch
define-__raw_get_cpu_var-and-use-it.patch
ide-cd-end-of-media-error-fix.patch
time-clocksource-infrastructure.patch
sched-comment-bitmap-size-accounting.patch
sched-fix-interactive-ceiling-code.patch
sched-implement-smpnice.patch
sched-protect-calculation-of-max_pull-from-integer-wrap.patch
sched-store-weighted-load-on-up.patch
sched-add-discrete-weighted-cpu-load-function.patch
sched-prevent-high-load-weight-tasks-suppressing-balancing.patch
sched-improve-stability-of-smpnice-load-balancing.patch
sched-improve-smpnice-load-balancing-when-load-per-task.patch
smpnice-dont-consider-sched-groups-which-are-lightly-loaded-for-balancing.patch
smpnice-dont-consider-sched-groups-which-are-lightly-loaded-for-balancing-fix.patch
sched-modify-move_tasks-to-improve-load-balancing-outcomes.patch
sched-avoid-unnecessarily-moving-highest-priority-task-move_tasks.patch
sched-avoid-unnecessarily-moving-highest-priority-task-move_tasks-fix-2.patch
sched_domain-handle-kmalloc-failure.patch
sched_domain-handle-kmalloc-failure-fix.patch
sched_domain-dont-use-gfp_atomic.patch
sched_domain-use-kmalloc_node.patch
sched_domain-allocate-sched_group-structures-dynamically.patch
sched-add-above-background-load-function.patch
mm-implement-swap-prefetching-fix.patch
pi-futex-futex-code-cleanups.patch
pi-futex-futex-code-cleanups-fix.patch
pi-futex-introduce-debug_check_no_locks_freed.patch
pi-futex-add-plist-implementation.patch
pi-futex-scheduler-support-for-pi.patch
pi-futex-rt-mutex-core.patch
pi-futex-rt-mutex-core-fix-timeout-race.patch
pi-futex-rt-mutex-docs.patch
pi-futex-rt-mutex-debug.patch
pi-futex-rt-mutex-tester.patch
pi-futex-rt-mutex-futex-api.patch
pi-futex-futex_lock_pi-futex_unlock_pi-support.patch
pi-futex-v2.patch
pi-futex-v3.patch
pi-futex-patchset-v4.patch
pi-futex-patchset-v4-update.patch
pi-futex-patchset-v4-fix.patch
rtmutex-remove-buggy-bug_on-in-pi-boosting-code.patch
futex-pi-enforce-waiter-bit-when-owner-died-is-detected.patch
rtmutex-debug-printk-correct-task-information.patch
futex-pi-make-use-of-restart_block-when-interrupted.patch
document-futex-pi-design.patch
futex_requeue-optimization.patch
reiser4.patch
genirq-rename-desc-handler-to-desc-chip.patch
genirq-rename-desc-handler-to-desc-chip-power-fix.patch
genirq-rename-desc-handler-to-desc-chip-ia64-fix.patch
genirq-sem2mutex-probe_sem-probing_active.patch
genirq-cleanup-merge-irq_affinity-into-irq_desc.patch
genirq-cleanup-remove-irq_descp.patch
genirq-cleanup-remove-fastcall.patch
genirq-cleanup-misc-code-cleanups.patch
genirq-cleanup-reduce-irq_desc_t-use-mark-it-obsolete.patch
genirq-cleanup-include-linux-irqh.patch
genirq-cleanup-merge-irq_dir-smp_affinity_entry-into-irq_desc.patch
genirq-cleanup-merge-pending_irq_cpumask-into-irq_desc.patch
genirq-cleanup-turn-arch_has_irq_per_cpu-into-config_irq_per_cpu.patch
genirq-debug-better-debug-printout-in-enable_irq.patch
genirq-add-retrigger-irq-op-to-consolidate-hw_irq_resend.patch
genirq-doc-comment-include-linux-irqh-structures.patch
genirq-doc-handle_irq_event-and-__do_irq-comments.patch
genirq-cleanup-no_irq_type-cleanups.patch
genirq-doc-add-design-documentation.patch
genirq-add-genirq-sw-irq-retrigger.patch
genirq-add-irq_noprobe-support.patch
genirq-add-irq_norequest-support.patch
genirq-add-irq_noautoen-support.patch
genirq-update-copyrights.patch
genirq-core.patch
genirq-add-irq-chip-support.patch
genirq-add-handle_bad_irq.patch
genirq-add-irq-wake-power-management-support.patch
genirq-add-sa_trigger-support.patch
genirq-cleanup-no_irq_type-no_irq_chip-rename.patch
genirq-convert-the-x86_64-architecture-to-irq-chips.patch
genirq-convert-the-i386-architecture-to-irq-chips.patch
genirq-more-verbose-debugging-on-unexpected-irq-vectors.patch
detect-atomic-counter-underflows.patch
debug-shared-irqs.patch
make-frame_pointer-default=y.patch
mutex-subsystem-synchro-test-module.patch
add-print_fatal_signals-support.patch
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