diff options
51 files changed, 208 insertions, 1082 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 919d8b9..f81a623 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -47,6 +47,18 @@ config MCA <file:Documentation/mca.txt> (and especially the web page given there) before attempting to build an MCA bus kernel. +config GENERIC_HARDIRQS + bool + default y + +config HARDIRQS_SW_RESEND + bool + default y + +config GENERIC_IRQ_PROBE + bool + default y + config RWSEM_GENERIC_SPINLOCK bool default y diff --git a/arch/arm/common/gic.c b/arch/arm/common/gic.c index c02dc81..f3c1ebf 100644 --- a/arch/arm/common/gic.c +++ b/arch/arm/common/gic.c @@ -33,6 +33,7 @@ static void __iomem *gic_dist_base; static void __iomem *gic_cpu_base; +static DEFINE_SPINLOCK(irq_controller_lock); /* * Routines to acknowledge, disable and enable interrupts @@ -52,32 +53,45 @@ static void __iomem *gic_cpu_base; static void gic_ack_irq(unsigned int irq) { u32 mask = 1 << (irq % 32); + + spin_lock(&irq_controller_lock); writel(mask, gic_dist_base + GIC_DIST_ENABLE_CLEAR + (irq / 32) * 4); writel(irq, gic_cpu_base + GIC_CPU_EOI); + spin_unlock(&irq_controller_lock); } static void gic_mask_irq(unsigned int irq) { u32 mask = 1 << (irq % 32); + + spin_lock(&irq_controller_lock); writel(mask, gic_dist_base + GIC_DIST_ENABLE_CLEAR + (irq / 32) * 4); + spin_unlock(&irq_controller_lock); } static void gic_unmask_irq(unsigned int irq) { u32 mask = 1 << (irq % 32); + + spin_lock(&irq_controller_lock); writel(mask, gic_dist_base + GIC_DIST_ENABLE_SET + (irq / 32) * 4); + spin_unlock(&irq_controller_lock); } #ifdef CONFIG_SMP -static void gic_set_cpu(struct irqdesc *desc, unsigned int irq, unsigned int cpu) +static void gic_set_cpu(unsigned int irq, cpumask_t mask_val) { void __iomem *reg = gic_dist_base + GIC_DIST_TARGET + (irq & ~3); unsigned int shift = (irq % 4) * 8; + unsigned int cpu = first_cpu(mask_val); u32 val; + spin_lock(&irq_controller_lock); + irq_desc[irq].cpu = cpu; val = readl(reg) & ~(0xff << shift); val |= 1 << (cpu + shift); writel(val, reg); + spin_unlock(&irq_controller_lock); } #endif @@ -86,7 +100,7 @@ static struct irqchip gic_chip = { .mask = gic_mask_irq, .unmask = gic_unmask_irq, #ifdef CONFIG_SMP - .set_cpu = gic_set_cpu, + .set_affinity = gic_set_cpu, #endif }; diff --git a/arch/arm/common/sa1111.c b/arch/arm/common/sa1111.c index fe06a36..1cdb26a 100644 --- a/arch/arm/common/sa1111.c +++ b/arch/arm/common/sa1111.c @@ -150,7 +150,7 @@ static void sa1111_irq_handler(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs) { unsigned int stat0, stat1, i; - void __iomem *base = desc->data; + void __iomem *base = get_irq_data(irq); stat0 = sa1111_readl(base + SA1111_INTSTATCLR0); stat1 = sa1111_readl(base + SA1111_INTSTATCLR1); @@ -168,11 +168,11 @@ sa1111_irq_handler(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs) for (i = IRQ_SA1111_START; stat0; i++, stat0 >>= 1) if (stat0 & 1) - do_edge_IRQ(i, irq_desc + i, regs); + handle_edge_irq(i, irq_desc + i, regs); for (i = IRQ_SA1111_START + 32; stat1; i++, stat1 >>= 1) if (stat1 & 1) - do_edge_IRQ(i, irq_desc + i, regs); + handle_edge_irq(i, irq_desc + i, regs); /* For level-based interrupts */ desc->chip->unmask(irq); diff --git a/arch/arm/common/time-acorn.c b/arch/arm/common/time-acorn.c index 486add8..31b65e2 100644 --- a/arch/arm/common/time-acorn.c +++ b/arch/arm/common/time-acorn.c @@ -16,6 +16,7 @@ #include <linux/timex.h> #include <linux/init.h> #include <linux/interrupt.h> +#include <linux/irq.h> #include <asm/hardware.h> #include <asm/io.h> diff --git a/arch/arm/kernel/ecard.c b/arch/arm/kernel/ecard.c index 68a2576..ab4ad95 100644 --- a/arch/arm/kernel/ecard.c +++ b/arch/arm/kernel/ecard.c @@ -619,7 +619,7 @@ ecard_irqexp_handler(unsigned int irq, struct irqdesc *desc, struct pt_regs *reg ecard_t *ec = slot_to_ecard(slot); if (ec->claimed) { - struct irqdesc *d = irqdesc + ec->irq; + struct irq_desc *d = irq_desc + ec->irq; /* * this ugly code is so that we can operate a * prioritorising system: diff --git a/arch/arm/kernel/fiq.c b/arch/arm/kernel/fiq.c index 1ec3f7f..e8e9034 100644 --- a/arch/arm/kernel/fiq.c +++ b/arch/arm/kernel/fiq.c @@ -38,6 +38,7 @@ #include <linux/module.h> #include <linux/kernel.h> #include <linux/init.h> +#include <linux/interrupt.h> #include <linux/seq_file.h> #include <asm/cacheflush.h> diff --git a/arch/arm/kernel/irq.c b/arch/arm/kernel/irq.c index 4d31cf8..c3d4e94 100644 --- a/arch/arm/kernel/irq.c +++ b/arch/arm/kernel/irq.c @@ -26,6 +26,7 @@ #include <linux/signal.h> #include <linux/ioport.h> #include <linux/interrupt.h> +#include <linux/irq.h> #include <linux/ptrace.h> #include <linux/slab.h> #include <linux/random.h> @@ -37,192 +38,18 @@ #include <linux/kallsyms.h> #include <linux/proc_fs.h> -#include <asm/irq.h> #include <asm/system.h> -#include <asm/mach/irq.h> #include <asm/mach/time.h> /* - * Maximum IRQ count. Currently, this is arbitary. However, it should - * not be set too low to prevent false triggering. Conversely, if it - * is set too high, then you could miss a stuck IRQ. - * - * Maybe we ought to set a timer and re-enable the IRQ at a later time? - */ -#define MAX_IRQ_CNT 100000 - -static int noirqdebug __read_mostly; -static volatile unsigned long irq_err_count; -static DEFINE_SPINLOCK(irq_controller_lock); -static LIST_HEAD(irq_pending); - -struct irqdesc irq_desc[NR_IRQS]; -void (*init_arch_irq)(void) __initdata = NULL; - -/* * No architecture-specific irq_finish function defined in arm/arch/irqs.h. */ #ifndef irq_finish #define irq_finish(irq) do { } while (0) #endif -/* - * Dummy mask/unmask handler - */ -void dummy_mask_unmask_irq(unsigned int irq) -{ -} - -irqreturn_t no_action(int irq, void *dev_id, struct pt_regs *regs) -{ - return IRQ_NONE; -} - -void do_bad_IRQ(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs) -{ - irq_err_count++; - printk(KERN_ERR "IRQ: spurious interrupt %d\n", irq); -} - -static struct irqchip bad_chip = { - .ack = dummy_mask_unmask_irq, - .mask = dummy_mask_unmask_irq, - .unmask = dummy_mask_unmask_irq, -}; - -static struct irqdesc bad_irq_desc = { - .chip = &bad_chip, - .handle = do_bad_IRQ, - .pend = LIST_HEAD_INIT(bad_irq_desc.pend), - .disable_depth = 1, -}; - -#ifdef CONFIG_SMP -void synchronize_irq(unsigned int irq) -{ - struct irqdesc *desc = irq_desc + irq; - - while (desc->running) - barrier(); -} -EXPORT_SYMBOL(synchronize_irq); - -#define smp_set_running(desc) do { desc->running = 1; } while (0) -#define smp_clear_running(desc) do { desc->running = 0; } while (0) -#else -#define smp_set_running(desc) do { } while (0) -#define smp_clear_running(desc) do { } while (0) -#endif - -/** - * disable_irq_nosync - disable an irq without waiting - * @irq: Interrupt to disable - * - * Disable the selected interrupt line. Enables and disables - * are nested. We do this lazily. - * - * This function may be called from IRQ context. - */ -void disable_irq_nosync(unsigned int irq) -{ - struct irqdesc *desc = irq_desc + irq; - unsigned long flags; - - spin_lock_irqsave(&irq_controller_lock, flags); - desc->disable_depth++; - list_del_init(&desc->pend); - spin_unlock_irqrestore(&irq_controller_lock, flags); -} -EXPORT_SYMBOL(disable_irq_nosync); - -/** - * disable_irq - disable an irq and wait for completion - * @irq: Interrupt to disable - * - * Disable the selected interrupt line. Enables and disables - * are nested. This functions waits for any pending IRQ - * handlers for this interrupt to complete before returning. - * If you use this function while holding a resource the IRQ - * handler may need you will deadlock. - * - * This function may be called - with care - from IRQ context. - */ -void disable_irq(unsigned int irq) -{ - struct irqdesc *desc = irq_desc + irq; - - disable_irq_nosync(irq); - if (desc->action) - synchronize_irq(irq); -} -EXPORT_SYMBOL(disable_irq); - -/** - * enable_irq - enable interrupt handling on an irq - * @irq: Interrupt to enable - * - * Re-enables the processing of interrupts on this IRQ line. - * Note that this may call the interrupt handler, so you may - * get unexpected results if you hold IRQs disabled. - * - * This function may be called from IRQ context. - */ -void enable_irq(unsigned int irq) -{ - struct irqdesc *desc = irq_desc + irq; - unsigned long flags; - - spin_lock_irqsave(&irq_controller_lock, flags); - if (unlikely(!desc->disable_depth)) { - printk("enable_irq(%u) unbalanced from %p\n", irq, - __builtin_return_address(0)); - } else if (!--desc->disable_depth) { - desc->probing = 0; - desc->chip->unmask(irq); - - /* - * If the interrupt is waiting to be processed, - * try to re-run it. We can't directly run it - * from here since the caller might be in an - * interrupt-protected region. - */ - if (desc->pending && list_empty(&desc->pend)) { - desc->pending = 0; - if (!desc->chip->retrigger || - desc->chip->retrigger(irq)) - list_add(&desc->pend, &irq_pending); - } - } - spin_unlock_irqrestore(&irq_controller_lock, flags); -} -EXPORT_SYMBOL(enable_irq); - -/* - * Enable wake on selected irq - */ -void enable_irq_wake(unsigned int irq) -{ - struct irqdesc *desc = irq_desc + irq; - unsigned long flags; - - spin_lock_irqsave(&irq_controller_lock, flags); - if (desc->chip->set_wake) - desc->chip->set_wake(irq, 1); - spin_unlock_irqrestore(&irq_controller_lock, flags); -} -EXPORT_SYMBOL(enable_irq_wake); - -void disable_irq_wake(unsigned int irq) -{ - struct irqdesc *desc = irq_desc + irq; - unsigned long flags; - - spin_lock_irqsave(&irq_controller_lock, flags); - if (desc->chip->set_wake) - desc->chip->set_wake(irq, 0); - spin_unlock_irqrestore(&irq_controller_lock, flags); -} -EXPORT_SYMBOL(disable_irq_wake); +void (*init_arch_irq)(void) __initdata = NULL; +unsigned long irq_err_count; int show_interrupts(struct seq_file *p, void *v) { @@ -242,8 +69,8 @@ int show_interrupts(struct seq_file *p, void *v) } if (i < NR_IRQS) { - spin_lock_irqsave(&irq_controller_lock, flags); - action = irq_desc[i].action; + spin_lock_irqsave(&irq_desc[i].lock, flags); + action = irq_desc[i].action; if (!action) goto unlock; @@ -256,7 +83,7 @@ int show_interrupts(struct seq_file *p, void *v) seq_putc(p, '\n'); unlock: - spin_unlock_irqrestore(&irq_controller_lock, flags); + spin_unlock_irqrestore(&irq_desc[i].lock, flags); } else if (i == NR_IRQS) { #ifdef CONFIG_ARCH_ACORN show_fiq_list(p, v); @@ -270,267 +97,11 @@ unlock: return 0; } -/* - * IRQ lock detection. - * - * Hopefully, this should get us out of a few locked situations. - * However, it may take a while for this to happen, since we need - * a large number if IRQs to appear in the same jiffie with the - * same instruction pointer (or within 2 instructions). - */ -static int check_irq_lock(struct irqdesc *desc, int irq, struct pt_regs *regs) -{ - unsigned long instr_ptr = instruction_pointer(regs); - - if (desc->lck_jif == jiffies && - desc->lck_pc >= instr_ptr && desc->lck_pc < instr_ptr + 8) { - desc->lck_cnt += 1; - - if (desc->lck_cnt > MAX_IRQ_CNT) { - printk(KERN_ERR "IRQ LOCK: IRQ%d is locking the system, disabled\n", irq); - return 1; - } - } else { - desc->lck_cnt = 0; - desc->lck_pc = instruction_pointer(regs); - desc->lck_jif = jiffies; - } - return 0; -} - -static void -report_bad_irq(unsigned int irq, struct pt_regs *regs, struct irqdesc *desc, int ret) -{ - static int count = 100; - struct irqaction *action; - - if (noirqdebug) - return; - - if (ret != IRQ_HANDLED && ret != IRQ_NONE) { - if (!count) - return; - count--; - printk("irq%u: bogus retval mask %x\n", irq, ret); - } else { - desc->irqs_unhandled++; - if (desc->irqs_unhandled <= 99900) - return; - desc->irqs_unhandled = 0; - printk("irq%u: nobody cared\n", irq); - } - show_regs(regs); - dump_stack(); - printk(KERN_ERR "handlers:"); - action = desc->action; - do { - printk("\n" KERN_ERR "[<%p>]", action->handler); - print_symbol(" (%s)", (unsigned long)action->handler); - action = action->next; - } while (action); - printk("\n"); -} - -static int -__do_irq(unsigned int irq, struct irqaction *action, struct pt_regs *regs) -{ - unsigned int status; - int ret, retval = 0; - - spin_unlock(&irq_controller_lock); - -#ifdef CONFIG_NO_IDLE_HZ - if (!(action->flags & SA_TIMER) && system_timer->dyn_tick != NULL) { - spin_lock(&system_timer->dyn_tick->lock); - if (system_timer->dyn_tick->state & DYN_TICK_ENABLED) - system_timer->dyn_tick->handler(irq, 0, regs); - spin_unlock(&system_timer->dyn_tick->lock); - } -#endif - - if (!(action->flags & SA_INTERRUPT)) - local_irq_enable(); - - status = 0; - do { - ret = action->handler(irq, action->dev_id, regs); - if (ret == IRQ_HANDLED) - status |= action->flags; - retval |= ret; - action = action->next; - } while (action); - - if (status & SA_SAMPLE_RANDOM) - add_interrupt_randomness(irq); - - spin_lock_irq(&irq_controller_lock); - - return retval; -} - -/* - * This is for software-decoded IRQs. The caller is expected to - * handle the ack, clear, mask and unmask issues. - */ -void -do_simple_IRQ(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs) -{ - struct irqaction *action; - const unsigned int cpu = smp_processor_id(); - - desc->triggered = 1; - - kstat_cpu(cpu).irqs[irq]++; - - smp_set_running(desc); - - action = desc->action; - if (action) { - int ret = __do_irq(irq, action, regs); - if (ret != IRQ_HANDLED) - report_bad_irq(irq, regs, desc, ret); - } - - smp_clear_running(desc); -} - -/* - * Most edge-triggered IRQ implementations seem to take a broken - * approach to this. Hence the complexity. - */ -void -do_edge_IRQ(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs) -{ - const unsigned int cpu = smp_processor_id(); - - desc->triggered = 1; - - /* - * If we're currently running this IRQ, or its disabled, - * we shouldn't process the IRQ. Instead, turn on the - * hardware masks. - */ - if (unlikely(desc->running || desc->disable_depth)) - goto running; - - /* - * Acknowledge and clear the IRQ, but don't mask it. - */ - desc->chip->ack(irq); - - /* - * Mark the IRQ currently in progress. - */ - desc->running = 1; - - kstat_cpu(cpu).irqs[irq]++; - - do { - struct irqaction *action; - - action = desc->action; - if (!action) - break; - - if (desc->pending && !desc->disable_depth) { - desc->pending = 0; - desc->chip->unmask(irq); - } - - __do_irq(irq, action, regs); - } while (desc->pending && !desc->disable_depth); - - desc->running = 0; - - /* - * If we were disabled or freed, shut down the handler. - */ - if (likely(desc->action && !check_irq_lock(desc, irq, regs))) - return; - - running: - /* - * We got another IRQ while this one was masked or - * currently running. Delay it. - */ - desc->pending = 1; - desc->chip->mask(irq); - desc->chip->ack(irq); -} - -/* - * Level-based IRQ handler. Nice and simple. - */ -void -do_level_IRQ(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs) -{ - struct irqaction *action; - const unsigned int cpu = smp_processor_id(); - - desc->triggered = 1; - - /* - * Acknowledge, clear _AND_ disable the interrupt. - */ - desc->chip->ack(irq); - - if (likely(!desc->disable_depth)) { - kstat_cpu(cpu).irqs[irq]++; - - smp_set_running(desc); - - /* - * Return with this interrupt masked if no action - */ - action = desc->action; - if (action) { - int ret = __do_irq(irq, desc->action, regs); - - if (ret != IRQ_HANDLED) - report_bad_irq(irq, regs, desc, ret); - - if (likely(!desc->disable_depth && - !check_irq_lock(desc, irq, regs))) - desc->chip->unmask(irq); - } - - smp_clear_running(desc); - } -} - -static void do_pending_irqs(struct pt_regs *regs) -{ - struct list_head head, *l, *n; - - do { - struct irqdesc *desc; - - /* - * First, take the pending interrupts off the list. - * The act of calling the handlers may add some IRQs - * back onto the list. - */ - head = irq_pending; - INIT_LIST_HEAD(&irq_pending); - head.next->prev = &head; - head.prev->next = &head; - - /* - * Now run each entry. We must delete it from our - * list before calling the handler. - */ - list_for_each_safe(l, n, &head) { - desc = list_entry(l, struct irqdesc, pend); - list_del_init(&desc->pend); - desc_handle_irq(desc - irq_desc, desc, regs); - } - - /* - * The list must be empty. - */ - BUG_ON(!list_empty(&head)); - } while (!list_empty(&irq_pending)); -} +/* Handle bad interrupts */ +static struct irq_desc bad_irq_desc = { + .handle_irq = handle_bad_irq, + .lock = SPIN_LOCK_UNLOCKED +}; /* * do_IRQ handles all hardware IRQ's. Decoded IRQs should not @@ -549,96 +120,15 @@ asmlinkage void asm_do_IRQ(unsigned int irq, struct pt_regs *regs) desc = &bad_irq_desc; irq_enter(); - spin_lock(&irq_controller_lock); - desc_handle_irq(irq, desc, regs); - /* - * Now re-run any pending interrupts. - */ - if (!list_empty(&irq_pending)) - do_pending_irqs(regs); + desc_handle_irq(irq, desc, regs); + /* AT91 specific workaround */ irq_finish(irq); - spin_unlock(&irq_controller_lock); irq_exit(); } -void __set_irq_handler(unsigned int irq, irq_handler_t handle, int is_chained) -{ - struct irqdesc *desc; - unsigned long flags; - - if (irq >= NR_IRQS) { - printk(KERN_ERR "Trying to install handler for IRQ%d\n", irq); - return; - } - - if (handle == NULL) - handle = do_bad_IRQ; - - desc = irq_desc + irq; - - if (is_chained && desc->chip == &bad_chip) - printk(KERN_WARNING "Trying to install chained handler for IRQ%d\n", irq); - - spin_lock_irqsave(&irq_controller_lock, flags); - if (handle == do_bad_IRQ) { - desc->chip->mask(irq); - desc->chip->ack(irq); - desc->disable_depth = 1; - } - desc->handle = handle; - if (handle != do_bad_IRQ && is_chained) { - desc->valid = 0; - desc->probe_ok = 0; - desc->disable_depth = 0; - desc->chip->unmask(irq); - } - spin_unlock_irqrestore(&irq_controller_lock, flags); -} - -void set_irq_chip(unsigned int irq, struct irqchip *chip) -{ - struct irqdesc *desc; - unsigned long flags; - - if (irq >= NR_IRQS) { - printk(KERN_ERR "Trying to install chip for IRQ%d\n", irq); - return; - } - - if (chip == NULL) - chip = &bad_chip; - - desc = irq_desc + irq; - spin_lock_irqsave(&irq_controller_lock, flags); - desc->chip = chip; - spin_unlock_irqrestore(&irq_controller_lock, flags); -} - -int set_irq_type(unsigned int irq, unsigned int type) -{ - struct irqdesc *desc; - unsigned long flags; - int ret = -ENXIO; - - if (irq >= NR_IRQS) { - printk(KERN_ERR "Trying to set irq type for IRQ%d\n", irq); - return -ENODEV; - } - - desc = irq_desc + irq; - if (desc->chip->set_type) { - spin_lock_irqsave(&irq_controller_lock, flags); - ret = desc->chip->set_type(irq, type); - spin_unlock_irqrestore(&irq_controller_lock, flags); - } - - return ret; -} -EXPORT_SYMBOL(set_irq_type); - void set_irq_flags(unsigned int irq, unsigned int iflags) { struct irqdesc *desc; @@ -650,421 +140,32 @@ void set_irq_flags(unsigned int irq, unsigned int iflags) } desc = irq_desc + irq; - spin_lock_irqsave(&irq_controller_lock, flags); - desc->valid = (iflags & IRQF_VALID) != 0; - desc->probe_ok = (iflags & IRQF_PROBE) != 0; - desc->noautoenable = (iflags & IRQF_NOAUTOEN) != 0; - spin_unlock_irqrestore(&irq_controller_lock, flags); -} - -int setup_irq(unsigned int irq, struct irqaction *new) -{ - int shared = 0; - struct irqaction *old, **p; - unsigned long flags; - struct irqdesc *desc; - - /* - * Some drivers like serial.c use request_irq() heavily, - * so we have to be careful not to interfere with a - * running system. - */ - if (new->flags & SA_SAMPLE_RANDOM) { - /* - * This function might sleep, we want to call it first, - * outside of the atomic block. - * Yes, this might clear the entropy pool if the wrong - * driver is attempted to be loaded, without actually - * installing a new handler, but is this really a problem, - * only the sysadmin is able to do this. - */ - rand_initialize_irq(irq); - } - - /* - * The following block of code has to be executed atomically - */ - desc = irq_desc + irq; - spin_lock_irqsave(&irq_controller_lock, flags); - p = &desc->action; - if ((old = *p) != NULL) { - /* - * Can't share interrupts unless both agree to and are - * the same type. - */ - if (!(old->flags & new->flags & SA_SHIRQ) || - (~old->flags & new->flags) & SA_TRIGGER_MASK) { - spin_unlock_irqrestore(&irq_controller_lock, flags); - return -EBUSY; - } - - /* add new interrupt at end of irq queue */ - do { - p = &old->next; - old = *p; - } while (old); - shared = 1; - } - - *p = new; - - if (!shared) { - desc->probing = 0; - desc->running = 0; - desc->pending = 0; - desc->disable_depth = 1; - - if (new->flags & SA_TRIGGER_MASK && - desc->chip->set_type) { - unsigned int type = new->flags & SA_TRIGGER_MASK; - desc->chip->set_type(irq, type); - } - - if (!desc->noautoenable) { - desc->disable_depth = 0; - desc->chip->unmask(irq); - } - } - - spin_unlock_irqrestore(&irq_controller_lock, flags); - return 0; -} - -/** - * request_irq - allocate an interrupt line - * @irq: Interrupt line to allocate - * @handler: Function to be called when the IRQ occurs - * @irqflags: Interrupt type flags - * @devname: An ascii name for the claiming device - * @dev_id: A cookie passed back to the handler function - * - * This call allocates interrupt resources and enables the - * interrupt line and IRQ handling. From the point this - * call is made your handler function may be invoked. Since - * your handler function must clear any interrupt the board - * raises, you must take care both to initialise your hardware - * and to set up the interrupt handler in the right order. - * - * Dev_id must be globally unique. Normally the address of the - * device data structure is used as the cookie. Since the handler - * receives this value it makes sense to use it. - * - * If your interrupt is shared you must pass a non NULL dev_id - * as this is required when freeing the interrupt. - * - * Flags: - * - * SA_SHIRQ Interrupt is shared - * - * SA_INTERRUPT Disable local interrupts while processing - * - * SA_SAMPLE_RANDOM The interrupt can be used for entropy - * - */ -int request_irq(unsigned int irq, irqreturn_t (*handler)(int, void *, struct pt_regs *), - unsigned long irq_flags, const char * devname, void *dev_id) -{ - unsigned long retval; - struct irqaction *action; - - if (irq >= NR_IRQS || !irq_desc[irq].valid || !handler || - (irq_flags & SA_SHIRQ && !dev_id)) - return -EINVAL; - - action = (struct irqaction *)kmalloc(sizeof(struct irqaction), GFP_KERNEL); - if (!action) - return -ENOMEM; - - action->handler = handler; - action->flags = irq_flags; - cpus_clear(action->mask); - action->name = devname; - action->next = NULL; - action->dev_id = dev_id; - - retval = setup_irq(irq, action); - - if (retval) - kfree(action); - return retval; -} - -EXPORT_SYMBOL(request_irq); - -/** - * free_irq - free an interrupt - * @irq: Interrupt line to free - * @dev_id: Device identity to free - * - * Remove an interrupt handler. The handler is removed and if the - * interrupt line is no longer in use by any driver it is disabled. - * On a shared IRQ the caller must ensure the interrupt is disabled - * on the card it drives before calling this function. - * - * This function must not be called from interrupt context. - */ -void free_irq(unsigned int irq, void *dev_id) -{ - struct irqaction * action, **p; - unsigned long flags; - - if (irq >= NR_IRQS || !irq_desc[irq].valid) { - printk(KERN_ERR "Trying to free IRQ%d\n",irq); - dump_stack(); - return; - } - - spin_lock_irqsave(&irq_controller_lock, flags); - for (p = &irq_desc[irq].action; (action = *p) != NULL; p = &action->next) { - if (action->dev_id != dev_id) - continue; - - /* Found it - now free it */ - *p = action->next; - break; - } - spin_unlock_irqrestore(&irq_controller_lock, flags); - - if (!action) { - printk(KERN_ERR "Trying to free free IRQ%d\n",irq); - dump_stack(); - } else { - synchronize_irq(irq); - kfree(action); - } -} - -EXPORT_SYMBOL(free_irq); - -static DECLARE_MUTEX(probe_sem); - -/* Start the interrupt probing. Unlike other architectures, - * we don't return a mask of interrupts from probe_irq_on, - * but return the number of interrupts enabled for the probe. - * The interrupts which have been enabled for probing is - * instead recorded in the irq_desc structure. - */ -unsigned long probe_irq_on(void) -{ - unsigned int i, irqs = 0; - unsigned long delay; - - down(&probe_sem); - - /* - * first snaffle up any unassigned but - * probe-able interrupts - */ - spin_lock_irq(&irq_controller_lock); - for (i = 0; i < NR_IRQS; i++) { - if (!irq_desc[i].probe_ok || irq_desc[i].action) - continue; - - irq_desc[i].probing = 1; - irq_desc[i].triggered = 0; - if (irq_desc[i].chip->set_type) - irq_desc[i].chip->set_type(i, IRQT_PROBE); - irq_desc[i].chip->unmask(i); - irqs += 1; - } - spin_unlock_irq(&irq_controller_lock); - - /* - * wait for spurious interrupts to mask themselves out again - */ - for (delay = jiffies + HZ/10; time_before(jiffies, delay); ) - /* min 100ms delay */; - - /* - * now filter out any obviously spurious interrupts - */ - spin_lock_irq(&irq_controller_lock); - for (i = 0; i < NR_IRQS; i++) { - if (irq_desc[i].probing && irq_desc[i].triggered) { - irq_desc[i].probing = 0; - irqs -= 1; - } - } - spin_unlock_irq(&irq_controller_lock); - - return irqs; -} - -EXPORT_SYMBOL(probe_irq_on); - -unsigned int probe_irq_mask(unsigned long irqs) -{ - unsigned int mask = 0, i; - - spin_lock_irq(&irq_controller_lock); - for (i = 0; i < 16 && i < NR_IRQS; i++) - if (irq_desc[i].probing && irq_desc[i].triggered) - mask |= 1 << i; - spin_unlock_irq(&irq_controller_lock); - - up(&probe_sem); - - return mask; -} -EXPORT_SYMBOL(probe_irq_mask); - -/* - * Possible return values: - * >= 0 - interrupt number - * -1 - no interrupt/many interrupts - */ -int probe_irq_off(unsigned long irqs) -{ - unsigned int i; - int irq_found = NO_IRQ; - - /* - * look at the interrupts, and find exactly one - * that we were probing has been triggered - */ - spin_lock_irq(&irq_controller_lock); - for (i = 0; i < NR_IRQS; i++) { - if (irq_desc[i].probing && - irq_desc[i].triggered) { - if (irq_found != NO_IRQ) { - irq_found = NO_IRQ; - goto out; - } - irq_found = i; - } - } - - if (irq_found == -1) - irq_found = NO_IRQ; -out: - spin_unlock_irq(&irq_controller_lock); - - up(&probe_sem); - - return irq_found; -} - -EXPORT_SYMBOL(probe_irq_off); - -#ifdef CONFIG_SMP -static void route_irq(struct irqdesc *desc, unsigned int irq, unsigned int cpu) -{ - pr_debug("IRQ%u: moving from cpu%u to cpu%u\n", irq, desc->cpu, cpu); - - spin_lock_irq(&irq_controller_lock); - desc->cpu = cpu; - desc->chip->set_cpu(desc, irq, cpu); - spin_unlock_irq(&irq_controller_lock); -} - -#ifdef CONFIG_PROC_FS -static int -irq_affinity_read_proc(char *page, char **start, off_t off, int count, - int *eof, void *data) -{ - struct irqdesc *desc = irq_desc + ((int)data); - int len = cpumask_scnprintf(page, count, desc->affinity); - - if (count - len < 2) - return -EINVAL; - page[len++] = '\n'; - page[len] = '\0'; - - return len; -} - -static int -irq_affinity_write_proc(struct file *file, const char __user *buffer, - unsigned long count, void *data) -{ - unsigned int irq = (unsigned int)data; - struct irqdesc *desc = irq_desc + irq; - cpumask_t affinity, tmp; - int ret = -EIO; - - if (!desc->chip->set_cpu) - goto out; - - ret = cpumask_parse(buffer, count, affinity); - if (ret) - goto out; - - cpus_and(tmp, affinity, cpu_online_map); - if (cpus_empty(tmp)) { - ret = -EINVAL; - goto out; - } - - desc->affinity = affinity; - route_irq(desc, irq, first_cpu(tmp)); - ret = count; - - out: - return ret; -} -#endif -#endif - -void __init init_irq_proc(void) -{ -#if defined(CONFIG_SMP) && defined(CONFIG_PROC_FS) - struct proc_dir_entry *dir; - int irq; - - dir = proc_mkdir("irq", NULL); - if (!dir) - return; - - for (irq = 0; irq < NR_IRQS; irq++) { - struct proc_dir_entry *entry; - struct irqdesc *desc; - char name[16]; - - desc = irq_desc + irq; - memset(name, 0, sizeof(name)); - snprintf(name, sizeof(name) - 1, "%u", irq); - - desc->procdir = proc_mkdir(name, dir); - if (!desc->procdir) - continue; - - entry = create_proc_entry("smp_affinity", 0600, desc->procdir); - if (entry) { - entry->nlink = 1; - entry->data = (void *)irq; - entry->read_proc = irq_affinity_read_proc; - entry->write_proc = irq_affinity_write_proc; - } - } -#endif + spin_lock_irqsave(&desc->lock, flags); + desc->status |= IRQ_NOREQUEST | IRQ_NOPROBE | IRQ_NOAUTOEN; + if (iflags & IRQF_VALID) + desc->status &= ~IRQ_NOREQUEST; + if (iflags & IRQF_PROBE) + desc->status &= ~IRQ_NOPROBE; + if (!(iflags & IRQF_NOAUTOEN)) + desc->status &= ~IRQ_NOAUTOEN; + spin_unlock_irqrestore(&desc->lock, flags); } void __init init_IRQ(void) { - struct irqdesc *desc; int irq; + for (irq = 0; irq < NR_IRQS; irq++) + irq_desc[irq].status |= IRQ_NOREQUEST | IRQ_DELAYED_DISABLE | + IRQ_NOPROBE; + #ifdef CONFIG_SMP bad_irq_desc.affinity = CPU_MASK_ALL; bad_irq_desc.cpu = smp_processor_id(); #endif - - for (irq = 0, desc = irq_desc; irq < NR_IRQS; irq++, desc++) { - *desc = bad_irq_desc; - INIT_LIST_HEAD(&desc->pend); - } - init_arch_irq(); } -static int __init noirqdebug_setup(char *str) -{ - noirqdebug = 1; - return 1; -} - -__setup("noirqdebug", noirqdebug_setup); - #ifdef CONFIG_HOTPLUG_CPU /* * The CPU has been marked offline. Migrate IRQs off this CPU. If diff --git a/arch/arm/mach-at91rm9200/at91rm9200_time.c b/arch/arm/mach-at91rm9200/at91rm9200_time.c index dc38e06..0aa2265 100644 --- a/arch/arm/mach-at91rm9200/at91rm9200_time.c +++ b/arch/arm/mach-at91rm9200/at91rm9200_time.c @@ -21,13 +21,13 @@ #include <linux/init.h> #include <linux/interrupt.h> +#include <linux/irq.h> #include <linux/kernel.h> #include <linux/sched.h> #include <linux/time.h> #include <asm/hardware.h> #include <asm/io.h> -#include <asm/irq.h> #include <asm/mach/time.h> static unsigned long last_crtr; diff --git a/arch/arm/mach-at91rm9200/gpio.c b/arch/arm/mach-at91rm9200/gpio.c index 83c3474..5783c28 100644 --- a/arch/arm/mach-at91rm9200/gpio.c +++ b/arch/arm/mach-at91rm9200/gpio.c @@ -10,12 +10,13 @@ */ #include <linux/errno.h> +#include <linux/interrupt.h> +#include <linux/irq.h> #include <linux/kernel.h> #include <linux/list.h> #include <linux/module.h> #include <asm/io.h> -#include <asm/mach/irq.h> #include <asm/hardware.h> #include <asm/arch/gpio.h> @@ -340,7 +341,7 @@ static void gpio_irq_handler(unsigned irq, struct irqdesc *desc, struct pt_regs void __iomem *pio; u32 isr; - pio = desc->base; + pio = get_irq_chip_data(irq); /* temporarily mask (level sensitive) parent IRQ */ desc->chip->ack(irq); @@ -350,12 +351,12 @@ static void gpio_irq_handler(unsigned irq, struct irqdesc *desc, struct pt_regs if (!isr) break; - pin = (unsigned) desc->data; + pin = (unsigned) get_irq_data(irq); gpio = &irq_desc[pin]; while (isr) { if (isr & 1) { - if (unlikely(gpio->disable_depth)) { + if (unlikely(gpio->depth)) { /* * The core ARM interrupt handler lazily disables IRQs so * another IRQ must be generated before it actually gets @@ -364,7 +365,7 @@ static void gpio_irq_handler(unsigned irq, struct irqdesc *desc, struct pt_regs gpio_irq_mask(pin); } else - gpio->handle(pin, gpio, regs); + desc_handle_irq(pin, gpio, regs); } pin++; gpio++; diff --git a/arch/arm/mach-clps711x/time.c b/arch/arm/mach-clps711x/time.c index 1a23f0d..b0f1db2 100644 --- a/arch/arm/mach-clps711x/time.c +++ b/arch/arm/mach-clps711x/time.c @@ -19,6 +19,7 @@ #include <linux/timex.h> #include <linux/init.h> #include <linux/interrupt.h> +#include <linux/irq.h> #include <linux/sched.h> #include <asm/hardware.h> diff --git a/arch/arm/mach-clps7500/core.c b/arch/arm/mach-clps7500/core.c index 5b12cab..cd66df8 100644 --- a/arch/arm/mach-clps7500/core.c +++ b/arch/arm/mach-clps7500/core.c @@ -9,6 +9,7 @@ #include <linux/kernel.h> #include <linux/types.h> #include <linux/interrupt.h> +#include <linux/irq.h> #include <linux/list.h> #include <linux/sched.h> #include <linux/init.h> diff --git a/arch/arm/mach-footbridge/dc21285-timer.c b/arch/arm/mach-footbridge/dc21285-timer.c index 14a62d6..e668d4a 100644 --- a/arch/arm/mach-footbridge/dc21285-timer.c +++ b/arch/arm/mach-footbridge/dc21285-timer.c @@ -6,6 +6,7 @@ */ #include <linux/init.h> #include <linux/interrupt.h> +#include <linux/irq.h> #include <asm/irq.h> diff --git a/arch/arm/mach-footbridge/isa-timer.c b/arch/arm/mach-footbridge/isa-timer.c index c1d74f7a..282b473 100644 --- a/arch/arm/mach-footbridge/isa-timer.c +++ b/arch/arm/mach-footbridge/isa-timer.c @@ -6,6 +6,7 @@ */ #include <linux/init.h> #include <linux/interrupt.h> +#include <linux/irq.h> #include <asm/io.h> #include <asm/irq.h> diff --git a/arch/arm/mach-imx/time.c b/arch/arm/mach-imx/time.c index 294b1c4..5f9a047 100644 --- a/arch/arm/mach-imx/time.c +++ b/arch/arm/mach-imx/time.c @@ -12,6 +12,7 @@ #include <linux/sched.h> #include <linux/init.h> #include <linux/interrupt.h> +#include <linux/irq.h> #include <linux/time.h> #include <asm/hardware.h> diff --git a/arch/arm/mach-integrator/core.c b/arch/arm/mach-integrator/core.c index 576a5e9..2d7e505 100644 --- a/arch/arm/mach-integrator/core.c +++ b/arch/arm/mach-integrator/core.c @@ -13,6 +13,7 @@ #include <linux/device.h> #include <linux/spinlock.h> #include <linux/interrupt.h> +#include <linux/irq.h> #include <linux/sched.h> #include <linux/smp.h> #include <linux/termios.h> diff --git a/arch/arm/mach-ixp2000/core.c b/arch/arm/mach-ixp2000/core.c index 3cfc5aa..b31f31a 100644 --- a/arch/arm/mach-ixp2000/core.c +++ b/arch/arm/mach-ixp2000/core.c @@ -19,6 +19,7 @@ #include <linux/spinlock.h> #include <linux/sched.h> #include <linux/interrupt.h> +#include <linux/irq.h> #include <linux/serial.h> #include <linux/tty.h> #include <linux/bitops.h> @@ -408,7 +409,7 @@ static void ixp2000_err_irq_handler(unsigned int irq, struct irqdesc *desc, str for(i = 31; i >= 0; i--) { if(status & (1 << i)) { desc = irq_desc + IRQ_IXP2000_DRAM0_MIN_ERR + i; - desc->handle(IRQ_IXP2000_DRAM0_MIN_ERR + i, desc, regs); + desc_handle_irq(IRQ_IXP2000_DRAM0_MIN_ERR + i, desc, regs); } } } diff --git a/arch/arm/mach-ixp2000/ixdp2x00.c b/arch/arm/mach-ixp2000/ixdp2x00.c index 9b8ded2..40eef8b 100644 --- a/arch/arm/mach-ixp2000/ixdp2x00.c +++ b/arch/arm/mach-ixp2000/ixdp2x00.c @@ -167,7 +167,7 @@ void ixdp2x00_init_irq(volatile unsigned long *stat_reg, volatile unsigned long } /* Hook into PCI interrupt */ - set_irq_chained_handler(IRQ_IXP2000_PCIB, &ixdp2x00_irq_handler); + set_irq_chained_handler(IRQ_IXP2000_PCIB, ixdp2x00_irq_handler); } /************************************************************************* diff --git a/arch/arm/mach-ixp2000/ixdp2x01.c b/arch/arm/mach-ixp2000/ixdp2x01.c index 8477ae1..7f42366 100644 --- a/arch/arm/mach-ixp2000/ixdp2x01.c +++ b/arch/arm/mach-ixp2000/ixdp2x01.c @@ -127,7 +127,7 @@ void __init ixdp2x01_init_irq(void) } /* Hook into PCI interrupts */ - set_irq_chained_handler(IRQ_IXP2000_PCIB, &ixdp2x01_irq_handler); + set_irq_chained_handler(IRQ_IXP2000_PCIB, ixdp2x01_irq_handler); } diff --git a/arch/arm/mach-ixp23xx/core.c b/arch/arm/mach-ixp23xx/core.c index 82ad6ef..7c218ae 100644 --- a/arch/arm/mach-ixp23xx/core.c +++ b/arch/arm/mach-ixp23xx/core.c @@ -271,7 +271,7 @@ static void pci_handler(unsigned int irq, struct irqdesc *desc, struct pt_regs * } int_desc = irq_desc + irqno; - int_desc->handle(irqno, int_desc, regs); + desc_handle_irq(irqno, int_desc, regs); desc->chip->unmask(irq); } diff --git a/arch/arm/mach-ixp23xx/ixdp2351.c b/arch/arm/mach-ixp23xx/ixdp2351.c index bba9d9f..37a32e6 100644 --- a/arch/arm/mach-ixp23xx/ixdp2351.c +++ b/arch/arm/mach-ixp23xx/ixdp2351.c @@ -19,6 +19,7 @@ #include <linux/spinlock.h> #include <linux/sched.h> #include <linux/interrupt.h> +#include <linux/irq.h> #include <linux/serial.h> #include <linux/tty.h> #include <linux/bitops.h> @@ -36,7 +37,6 @@ #include <asm/memory.h> #include <asm/hardware.h> #include <asm/mach-types.h> -#include <asm/irq.h> #include <asm/system.h> #include <asm/tlbflush.h> #include <asm/pgtable.h> @@ -74,7 +74,7 @@ static void ixdp2351_inta_handler(unsigned int irq, struct irqdesc *desc, struct int cpld_irq = IXP23XX_MACH_IRQ(IXDP2351_INTA_IRQ_BASE + i); cpld_desc = irq_desc + cpld_irq; - cpld_desc->handle(cpld_irq, cpld_desc, regs); + desc_handle_irq(cpld_irq, cpld_desc, regs); } } @@ -111,7 +111,7 @@ static void ixdp2351_intb_handler(unsigned int irq, struct irqdesc *desc, struct int cpld_irq = IXP23XX_MACH_IRQ(IXDP2351_INTB_IRQ_BASE + i); cpld_desc = irq_desc + cpld_irq; - cpld_desc->handle(cpld_irq, cpld_desc, regs); + desc_handle_irq(cpld_irq, cpld_desc, regs); } } @@ -158,8 +158,8 @@ void ixdp2351_init_irq(void) } } - set_irq_chained_handler(IRQ_IXP23XX_INTA, &ixdp2351_inta_handler); - set_irq_chained_handler(IRQ_IXP23XX_INTB, &ixdp2351_intb_handler); + set_irq_chained_handler(IRQ_IXP23XX_INTA, ixdp2351_inta_handler); + set_irq_chained_handler(IRQ_IXP23XX_INTB, ixdp2351_intb_handler); } /* diff --git a/arch/arm/mach-ixp4xx/coyote-pci.c b/arch/arm/mach-ixp4xx/coyote-pci.c index e6b7fcd..2cebb28 100644 --- a/arch/arm/mach-ixp4xx/coyote-pci.c +++ b/arch/arm/mach-ixp4xx/coyote-pci.c @@ -17,6 +17,7 @@ #include <linux/kernel.h> #include <linux/pci.h> #include <linux/init.h> +#include <linux/irq.h> #include <asm/mach-types.h> #include <asm/hardware.h> diff --git a/arch/arm/mach-ixp4xx/ixdp425-pci.c b/arch/arm/mach-ixp4xx/ixdp425-pci.c index 8b8ca80c..d5156c0 100644 --- a/arch/arm/mach-ixp4xx/ixdp425-pci.c +++ b/arch/arm/mach-ixp4xx/ixdp425-pci.c @@ -17,6 +17,7 @@ #include <linux/kernel.h> #include <linux/pci.h> #include <linux/init.h> +#include <linux/irq.h> #include <linux/delay.h> #include <asm/mach/pci.h> diff --git a/arch/arm/mach-ixp4xx/ixdpg425-pci.c b/arch/arm/mach-ixp4xx/ixdpg425-pci.c index 526fb61..ed52708 100644 --- a/arch/arm/mach-ixp4xx/ixdpg425-pci.c +++ b/arch/arm/mach-ixp4xx/ixdpg425-pci.c @@ -16,10 +16,10 @@ #include <linux/kernel.h> #include <linux/pci.h> #include <linux/init.h> +#include <linux/irq.h> #include <asm/mach-types.h> #include <asm/hardware.h> -#include <asm/irq.h> #include <asm/mach/pci.h> diff --git a/arch/arm/mach-ixp4xx/nas100d-pci.c b/arch/arm/mach-ixp4xx/nas100d-pci.c index 2d3b770..b8ebaf4 100644 --- a/arch/arm/mach-ixp4xx/nas100d-pci.c +++ b/arch/arm/mach-ixp4xx/nas100d-pci.c @@ -17,6 +17,7 @@ #include <linux/pci.h> #include <linux/init.h> +#include <linux/irq.h> #include <asm/mach/pci.h> #include <asm/mach-types.h> diff --git a/arch/arm/mach-ixp4xx/nas100d-power.c b/arch/arm/mach-ixp4xx/nas100d-power.c index a3745ed..f58a1d0 100644 --- a/arch/arm/mach-ixp4xx/nas100d-power.c +++ b/arch/arm/mach-ixp4xx/nas100d-power.c @@ -17,9 +17,9 @@ * */ -#include <linux/module.h> -#include <linux/reboot.h> #include <linux/interrupt.h> +#include <linux/irq.h> +#include <linux/module.h> #include <linux/reboot.h> #include <asm/mach-types.h> diff --git a/arch/arm/mach-l7200/core.c b/arch/arm/mach-l7200/core.c index ac62643..b7af5640 100644 --- a/arch/arm/mach-l7200/core.c +++ b/arch/arm/mach-l7200/core.c @@ -7,6 +7,7 @@ */ #include <linux/kernel.h> #include <linux/init.h> +#include <linux/irq.h> #include <linux/device.h> #include <asm/types.h> diff --git a/arch/arm/mach-lh7a40x/arch-lpd7a40x.c b/arch/arm/mach-lh7a40x/arch-lpd7a40x.c index c0e6854..35c3606 100644 --- a/arch/arm/mach-lh7a40x/arch-lpd7a40x.c +++ b/arch/arm/mach-lh7a40x/arch-lpd7a40x.c @@ -12,6 +12,7 @@ #include <linux/init.h> #include <linux/platform_device.h> #include <linux/interrupt.h> +#include <linux/irq.h> #include <asm/hardware.h> #include <asm/setup.h> diff --git a/arch/arm/mach-lh7a40x/time.c b/arch/arm/mach-lh7a40x/time.c index 1919835..4d26c9f 100644 --- a/arch/arm/mach-lh7a40x/time.c +++ b/arch/arm/mach-lh7a40x/time.c @@ -11,6 +11,7 @@ #include <linux/module.h> #include <linux/kernel.h> #include <linux/interrupt.h> +#include <linux/irq.h> #include <linux/time.h> #include <asm/hardware.h> diff --git a/arch/arm/mach-omap1/board-osk.c b/arch/arm/mach-omap1/board-osk.c index e0711d2..9193330 100644 --- a/arch/arm/mach-omap1/board-osk.c +++ b/arch/arm/mach-omap1/board-osk.c @@ -29,7 +29,7 @@ #include <linux/kernel.h> #include <linux/init.h> #include <linux/platform_device.h> -#include <linux/interrupt.h> +#include <linux/irq.h> #include <linux/mtd/mtd.h> #include <linux/mtd/partitions.h> diff --git a/arch/arm/mach-omap1/serial.c b/arch/arm/mach-omap1/serial.c index 5631974..5615fb8 100644 --- a/arch/arm/mach-omap1/serial.c +++ b/arch/arm/mach-omap1/serial.c @@ -11,6 +11,7 @@ #include <linux/module.h> #include <linux/kernel.h> #include <linux/init.h> +#include <linux/irq.h> #include <linux/delay.h> #include <linux/serial.h> #include <linux/tty.h> diff --git a/arch/arm/mach-pxa/idp.c b/arch/arm/mach-pxa/idp.c index 347b9de..6914d22 100644 --- a/arch/arm/mach-pxa/idp.c +++ b/arch/arm/mach-pxa/idp.c @@ -18,6 +18,7 @@ #include <linux/init.h> #include <linux/interrupt.h> +#include <linux/irq.h> #include <linux/platform_device.h> #include <linux/fb.h> diff --git a/arch/arm/mach-pxa/sharpsl_pm.c b/arch/arm/mach-pxa/sharpsl_pm.c index 0f16487..1e5e6ca 100644 --- a/arch/arm/mach-pxa/sharpsl_pm.c +++ b/arch/arm/mach-pxa/sharpsl_pm.c @@ -18,11 +18,11 @@ #include <linux/init.h> #include <linux/kernel.h> #include <linux/interrupt.h> +#include <linux/irq.h> #include <linux/platform_device.h> #include <asm/hardware.h> #include <asm/mach-types.h> -#include <asm/irq.h> #include <asm/apm.h> #include <asm/arch/pm.h> #include <asm/arch/pxa-regs.h> diff --git a/arch/arm/mach-s3c2410/bast-irq.c b/arch/arm/mach-s3c2410/bast-irq.c index fbbeb05..def4441 100644 --- a/arch/arm/mach-s3c2410/bast-irq.c +++ b/arch/arm/mach-s3c2410/bast-irq.c @@ -136,8 +136,8 @@ bast_irq_pc104_demux(unsigned int irq, for (i = 0; stat != 0; i++, stat >>= 1) { if (stat & 1) { irqno = bast_pc104_irqs[i]; - - desc_handle_irq(irqno, irq_desc + irqno, regs); + desc = irq_desc + irqno; + desc_handle_irq(irqno, desc, regs); } } } @@ -156,7 +156,7 @@ static __init int bast_irq_init(void) set_irq_chained_handler(IRQ_ISA, bast_irq_pc104_demux); - /* reigster our IRQs */ + /* register our IRQs */ for (i = 0; i < 4; i++) { unsigned int irqno = bast_pc104_irqs[i]; diff --git a/arch/arm/mach-s3c2410/time.c b/arch/arm/mach-s3c2410/time.c index 47387c5..c153c49 100644 --- a/arch/arm/mach-s3c2410/time.c +++ b/arch/arm/mach-s3c2410/time.c @@ -22,6 +22,7 @@ #include <linux/sched.h> #include <linux/init.h> #include <linux/interrupt.h> +#include <linux/irq.h> #include <linux/err.h> #include <linux/clk.h> diff --git a/arch/arm/mach-sa1100/cerf.c b/arch/arm/mach-sa1100/cerf.c index e0f6d57..31afe50 100644 --- a/arch/arm/mach-sa1100/cerf.c +++ b/arch/arm/mach-sa1100/cerf.c @@ -14,6 +14,7 @@ #include <linux/kernel.h> #include <linux/tty.h> #include <linux/platform_device.h> +#include <linux/irq.h> #include <linux/mtd/mtd.h> #include <linux/mtd/partitions.h> diff --git a/arch/arm/mach-sa1100/h3600.c b/arch/arm/mach-sa1100/h3600.c index e727ba8..e10d661 100644 --- a/arch/arm/mach-sa1100/h3600.c +++ b/arch/arm/mach-sa1100/h3600.c @@ -835,7 +835,7 @@ static void __init h3800_init_irq(void) } #endif set_irq_type(IRQ_GPIO_H3800_ASIC, IRQT_RISING); - set_irq_chained_handler(IRQ_GPIO_H3800_ASIC, &h3800_IRQ_demux); + set_irq_chained_handler(IRQ_GPIO_H3800_ASIC, h3800_IRQ_demux); } diff --git a/arch/arm/mach-sa1100/irq.c b/arch/arm/mach-sa1100/irq.c index b3a5602..2891b8c 100644 --- a/arch/arm/mach-sa1100/irq.c +++ b/arch/arm/mach-sa1100/irq.c @@ -11,12 +11,13 @@ */ #include <linux/init.h> #include <linux/module.h> +#include <linux/interrupt.h> +#include <linux/irq.h> #include <linux/ioport.h> #include <linux/ptrace.h> #include <linux/sysdev.h> #include <asm/hardware.h> -#include <asm/irq.h> #include <asm/mach/irq.h> #include "generic.h" diff --git a/arch/arm/mach-sa1100/pleb.c b/arch/arm/mach-sa1100/pleb.c index 0709ebab..c7bf7e0 100644 --- a/arch/arm/mach-sa1100/pleb.c +++ b/arch/arm/mach-sa1100/pleb.c @@ -7,6 +7,7 @@ #include <linux/tty.h> #include <linux/ioport.h> #include <linux/platform_device.h> +#include <linux/irq.h> #include <linux/mtd/partitions.h> diff --git a/arch/arm/mach-sa1100/time.c b/arch/arm/mach-sa1100/time.c index e4b435e..688b1e1 100644 --- a/arch/arm/mach-sa1100/time.c +++ b/arch/arm/mach-sa1100/time.c @@ -11,6 +11,7 @@ #include <linux/init.h> #include <linux/errno.h> #include <linux/interrupt.h> +#include <linux/irq.h> #include <linux/timex.h> #include <linux/signal.h> diff --git a/arch/arm/mach-shark/core.c b/arch/arm/mach-shark/core.c index 877600e..2f2c6e9 100644 --- a/arch/arm/mach-shark/core.c +++ b/arch/arm/mach-shark/core.c @@ -6,6 +6,7 @@ #include <linux/kernel.h> #include <linux/init.h> #include <linux/interrupt.h> +#include <linux/irq.h> #include <linux/sched.h> #include <linux/serial_8250.h> diff --git a/arch/arm/plat-omap/dma.c b/arch/arm/plat-omap/dma.c index c5d0214..c2c05ef 100644 --- a/arch/arm/plat-omap/dma.c +++ b/arch/arm/plat-omap/dma.c @@ -24,9 +24,9 @@ #include <linux/spinlock.h> #include <linux/errno.h> #include <linux/interrupt.h> +#include <linux/irq.h> #include <asm/system.h> -#include <asm/irq.h> #include <asm/hardware.h> #include <asm/dma.h> #include <asm/io.h> diff --git a/arch/arm/plat-omap/gpio.c b/arch/arm/plat-omap/gpio.c index ae08eee..cb0c21d 100644 --- a/arch/arm/plat-omap/gpio.c +++ b/arch/arm/plat-omap/gpio.c @@ -783,7 +783,7 @@ static void gpio_irq_handler(unsigned int irq, struct irqdesc *desc, desc->chip->ack(irq); - bank = (struct gpio_bank *) desc->data; + bank = get_irq_data(irq); if (bank->method == METHOD_MPUIO) isr_reg = bank->base + OMAP_MPUIO_GPIO_INT; #ifdef CONFIG_ARCH_OMAP15XX diff --git a/drivers/input/touchscreen/corgi_ts.c b/drivers/input/touchscreen/corgi_ts.c index d2f9759..9b66271 100644 --- a/drivers/input/touchscreen/corgi_ts.c +++ b/drivers/input/touchscreen/corgi_ts.c @@ -17,7 +17,7 @@ #include <linux/interrupt.h> #include <linux/module.h> #include <linux/slab.h> -//#include <asm/irq.h> +#include <linux/irq.h> #include <asm/arch/sharpsl.h> #include <asm/arch/hardware.h> diff --git a/drivers/pcmcia/soc_common.c b/drivers/pcmcia/soc_common.c index 888358f..ecaa132 100644 --- a/drivers/pcmcia/soc_common.c +++ b/drivers/pcmcia/soc_common.c @@ -38,12 +38,12 @@ #include <linux/timer.h> #include <linux/mm.h> #include <linux/interrupt.h> +#include <linux/irq.h> #include <linux/spinlock.h> #include <linux/cpufreq.h> #include <asm/hardware.h> #include <asm/io.h> -#include <asm/irq.h> #include <asm/system.h> #include "soc_common.h" diff --git a/include/asm-arm/dyntick.h b/include/asm-arm/dyntick.h new file mode 100644 index 0000000..19fab2d --- /dev/null +++ b/include/asm-arm/dyntick.h @@ -0,0 +1,6 @@ +#ifndef _ASMARM_DYNTICK_H +#define _ASMARM_DYNTICK_H + +#include <asm/mach/time.h> + +#endif /* _ASMARM_DYNTICK_H */ diff --git a/include/asm-arm/hw_irq.h b/include/asm-arm/hw_irq.h new file mode 100644 index 0000000..f1a08a5 --- /dev/null +++ b/include/asm-arm/hw_irq.h @@ -0,0 +1,9 @@ +/* + * Nothing to see here yet + */ +#ifndef _ARCH_ARM_HW_IRQ_H +#define _ARCH_ARM_HW_IRQ_H + +#include <asm/mach/irq.h> + +#endif diff --git a/include/asm-arm/irq.h b/include/asm-arm/irq.h index 66e67e6..283af50 100644 --- a/include/asm-arm/irq.h +++ b/include/asm-arm/irq.h @@ -21,18 +21,13 @@ struct irqaction; -extern void disable_irq_nosync(unsigned int); -extern void disable_irq(unsigned int); -extern void enable_irq(unsigned int); - /* - * These correspond with the SA_TRIGGER_* defines, and therefore the - * IORESOURCE_IRQ_* defines. + * Migration helpers */ -#define __IRQT_RISEDGE (1 << 0) -#define __IRQT_FALEDGE (1 << 1) -#define __IRQT_HIGHLVL (1 << 2) -#define __IRQT_LOWLVL (1 << 3) +#define __IRQT_FALEDGE IRQ_TYPE_EDGE_FALLING +#define __IRQT_RISEDGE IRQ_TYPE_EDGE_RISING +#define __IRQT_LOWLVL IRQ_TYPE_LEVEL_LOW +#define __IRQT_HIGHLVL IRQ_TYPE_LEVEL_HIGH #define IRQT_NOEDGE (0) #define IRQT_RISING (__IRQT_RISEDGE) @@ -40,12 +35,7 @@ extern void enable_irq(unsigned int); #define IRQT_BOTHEDGE (__IRQT_RISEDGE|__IRQT_FALEDGE) #define IRQT_LOW (__IRQT_LOWLVL) #define IRQT_HIGH (__IRQT_HIGHLVL) -#define IRQT_PROBE (1 << 4) - -int set_irq_type(unsigned int irq, unsigned int type); -void disable_irq_wake(unsigned int irq); -void enable_irq_wake(unsigned int irq); -int setup_irq(unsigned int, struct irqaction *); +#define IRQT_PROBE IRQ_TYPE_PROBE extern void migrate_irqs(void); #endif diff --git a/include/asm-arm/mach/irq.h b/include/asm-arm/mach/irq.h index d4d420e..131f337 100644 --- a/include/asm-arm/mach/irq.h +++ b/include/asm-arm/mach/irq.h @@ -10,95 +10,9 @@ #ifndef __ASM_ARM_MACH_IRQ_H #define __ASM_ARM_MACH_IRQ_H -struct irqdesc; -struct pt_regs; -struct seq_file; - -typedef void (*irq_handler_t)(unsigned int, struct irqdesc *, struct pt_regs *); -typedef void (*irq_control_t)(unsigned int); - -struct irqchip { - /* - * Acknowledge the IRQ. - * If this is a level-based IRQ, then it is expected to mask the IRQ - * as well. - */ - void (*ack)(unsigned int); - /* - * Mask the IRQ in hardware. - */ - void (*mask)(unsigned int); - /* - * Unmask the IRQ in hardware. - */ - void (*unmask)(unsigned int); - /* - * Ask the hardware to re-trigger the IRQ. - * Note: This method _must_ _not_ call the interrupt handler. - * If you are unable to retrigger the interrupt, do not - * provide a function, or if you do, return non-zero. - */ - int (*retrigger)(unsigned int); - /* - * Set the type of the IRQ. - */ - int (*set_type)(unsigned int, unsigned int); - /* - * Set wakeup-enable on the selected IRQ - */ - int (*set_wake)(unsigned int, unsigned int); - -#ifdef CONFIG_SMP - /* - * Route an interrupt to a CPU - */ - void (*set_cpu)(struct irqdesc *desc, unsigned int irq, unsigned int cpu); -#endif -}; - -struct irqdesc { - irq_handler_t handle; - struct irqchip *chip; - struct irqaction *action; - struct list_head pend; - void __iomem *base; - void *data; - unsigned int disable_depth; - - unsigned int triggered: 1; /* IRQ has occurred */ - unsigned int running : 1; /* IRQ is running */ - unsigned int pending : 1; /* IRQ is pending */ - unsigned int probing : 1; /* IRQ in use for a probe */ - unsigned int probe_ok : 1; /* IRQ can be used for probe */ - unsigned int valid : 1; /* IRQ claimable */ - unsigned int noautoenable : 1; /* don't automatically enable IRQ */ - unsigned int unused :25; - - unsigned int irqs_unhandled; - struct proc_dir_entry *procdir; - -#ifdef CONFIG_SMP - cpumask_t affinity; - unsigned int cpu; -#endif - - /* - * IRQ lock detection - */ - unsigned int lck_cnt; - unsigned int lck_pc; - unsigned int lck_jif; -}; - -extern struct irqdesc irq_desc[]; +#include <linux/irq.h> -/* - * Helpful inline function for calling irq descriptor handlers. - */ -static inline void desc_handle_irq(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs) -{ - desc->handle(irq, desc, regs); -} +struct seq_file; /* * This is internal. Do not use it. @@ -106,18 +20,22 @@ static inline void desc_handle_irq(unsigned int irq, struct irqdesc *desc, struc extern void (*init_arch_irq)(void); extern void init_FIQ(void); extern int show_fiq_list(struct seq_file *, void *); -void __set_irq_handler(unsigned int irq, irq_handler_t, int); /* - * External stuff. + * Function wrappers + */ +#define set_irq_chipdata(irq, d) set_irq_chip_data(irq, d) +#define get_irq_chipdata(irq) get_irq_chip_data(irq) + +/* + * Obsolete inline function for calling irq descriptor handlers. */ -#define set_irq_handler(irq,handler) __set_irq_handler(irq,handler,0) -#define set_irq_chained_handler(irq,handler) __set_irq_handler(irq,handler,1) -#define set_irq_data(irq,d) do { irq_desc[irq].data = d; } while (0) -#define set_irq_chipdata(irq,d) do { irq_desc[irq].base = d; } while (0) -#define get_irq_chipdata(irq) (irq_desc[irq].base) +static inline void desc_handle_irq(unsigned int irq, struct irq_desc *desc, + struct pt_regs *regs) +{ + desc->handle_irq(irq, desc, regs); +} -void set_irq_chip(unsigned int irq, struct irqchip *); void set_irq_flags(unsigned int irq, unsigned int flags); #define IRQF_VALID (1 << 0) @@ -125,12 +43,25 @@ void set_irq_flags(unsigned int irq, unsigned int flags); #define IRQF_NOAUTOEN (1 << 2) /* - * Built-in IRQ handlers. + * This is for easy migration, but should be changed in the source */ -void do_level_IRQ(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs); -void do_edge_IRQ(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs); -void do_simple_IRQ(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs); -void do_bad_IRQ(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs); -void dummy_mask_unmask_irq(unsigned int irq); +#define do_level_IRQ handle_level_irq +#define do_edge_IRQ handle_edge_irq +#define do_simple_IRQ handle_simple_irq +#define irqdesc irq_desc +#define irqchip irq_chip + +#define do_bad_IRQ(irq,desc,regs) \ +do { \ + spin_lock(&desc->lock); \ + handle_bad_irq(irq, desc, regs); \ + spin_unlock(&desc->lock); \ +} while(0) + +extern unsigned long irq_err_count; +static inline void ack_bad_irq(int irq) +{ + irq_err_count++; +} #endif diff --git a/include/linux/irq.h b/include/linux/irq.h index ae1e422..95d7aa7 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -347,8 +347,9 @@ 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: */ +/* Dummy irq-chip implementations: */ extern struct irq_chip no_irq_chip; +extern struct irq_chip dummy_irq_chip; extern void set_irq_chip_and_handler(unsigned int irq, struct irq_chip *chip, diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c index 4a0952d..54105bd 100644 --- a/kernel/irq/chip.c +++ b/kernel/irq/chip.c @@ -462,9 +462,18 @@ __set_irq_handler(unsigned int irq, if (!handle) handle = handle_bad_irq; - if (is_chained && desc->chip == &no_irq_chip) - printk(KERN_WARNING "Trying to install " - "chained interrupt type for IRQ%d\n", irq); + if (desc->chip == &no_irq_chip) { + printk(KERN_WARNING "Trying to install %sinterrupt handler " + "for IRQ%d\n", is_chained ? "chained " : " ", irq); + /* + * Some ARM implementations install a handler for really dumb + * interrupt hardware without setting an irq_chip. This worked + * with the ARM no_irq_chip but the check in setup_irq would + * prevent us to setup the interrupt at all. Switch it to + * dummy_irq_chip for easy transition. + */ + desc->chip = &dummy_irq_chip; + } spin_lock_irqsave(&desc->lock, flags); diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c index 6070e04..6d8b301 100644 --- a/kernel/irq/handle.c +++ b/kernel/irq/handle.c @@ -16,6 +16,10 @@ #include <linux/interrupt.h> #include <linux/kernel_stat.h> +#if defined(CONFIG_NO_IDLE_HZ) && defined(CONFIG_ARM) +#include <asm/dyntick.h> +#endif + #include "internals.h" /** @@ -92,6 +96,22 @@ struct irq_chip no_irq_chip = { }; /* + * Generic dummy implementation which can be used for + * real dumb interrupt sources + */ +struct irq_chip dummy_irq_chip = { + .name = "dummy", + .startup = noop_ret, + .shutdown = noop, + .enable = noop, + .disable = noop, + .ack = noop, + .mask = noop, + .unmask = noop, + .end = noop, +}; + +/* * Special, empty irq handler: */ irqreturn_t no_action(int cpl, void *dev_id, struct pt_regs *regs) @@ -113,6 +133,15 @@ irqreturn_t handle_IRQ_event(unsigned int irq, struct pt_regs *regs, irqreturn_t ret, retval = IRQ_NONE; unsigned int status = 0; +#if defined(CONFIG_NO_IDLE_HZ) && defined(CONFIG_ARM) + if (!(action->flags & SA_TIMER) && system_timer->dyn_tick != NULL) { + write_seqlock(&xtime_lock); + if (system_timer->dyn_tick->state & DYN_TICK_ENABLED) + system_timer->dyn_tick->handler(irq, 0, regs); + write_sequnlock(&xtime_lock); + } +#endif + if (!(action->flags & IRQF_DISABLED)) local_irq_enable(); |
