diff options
Diffstat (limited to 'arch/parisc/kernel/irq.c')
| -rw-r--r-- | arch/parisc/kernel/irq.c | 80 |
1 files changed, 26 insertions, 54 deletions
diff --git a/arch/parisc/kernel/irq.c b/arch/parisc/kernel/irq.c index e5fcfb70cc7c..dff66be65d29 100644 --- a/arch/parisc/kernel/irq.c +++ b/arch/parisc/kernel/irq.c @@ -15,16 +15,15 @@ #include <linux/kernel_stat.h> #include <linux/seq_file.h> #include <linux/types.h> +#include <linux/sched/task_stack.h> #include <asm/io.h> +#include <asm/softirq_stack.h> #include <asm/smp.h> #include <asm/ldcw.h> #undef PARISC_IRQ_CR16_COUNTS -extern irqreturn_t timer_interrupt(int, void *); -extern irqreturn_t ipi_interrupt(int, void *); - #define EIEM_MASK(irq) (1UL<<(CPU_IRQ_MAX - irq)) /* Bits in EIEM correlate with cpu_irq_action[]. @@ -103,28 +102,12 @@ int cpu_check_affinity(struct irq_data *d, const struct cpumask *dest) if (irqd_is_per_cpu(d)) return -EINVAL; - /* whatever mask they set, we just allow one CPU */ - cpu_dest = cpumask_next_and(d->irq & (num_online_cpus()-1), - dest, cpu_online_mask); + cpu_dest = cpumask_first_and(dest, cpu_online_mask); if (cpu_dest >= nr_cpu_ids) - cpu_dest = cpumask_first_and(dest, cpu_online_mask); + cpu_dest = cpumask_first(cpu_online_mask); return cpu_dest; } - -static int cpu_set_affinity_irq(struct irq_data *d, const struct cpumask *dest, - bool force) -{ - int cpu_dest; - - cpu_dest = cpu_check_affinity(d, dest); - if (cpu_dest < 0) - return -1; - - cpumask_copy(irq_data_get_affinity_mask(d), dest); - - return 0; -} #endif static struct irq_chip cpu_interrupt_type = { @@ -133,9 +116,6 @@ static struct irq_chip cpu_interrupt_type = { .irq_unmask = cpu_unmask_irq, .irq_ack = cpu_ack_irq, .irq_eoi = cpu_eoi_irq, -#ifdef CONFIG_SMP - .irq_set_affinity = cpu_set_affinity_irq, -#endif /* XXX: Needs to be written. We managed without it so far, but * we really ought to write it. */ @@ -216,12 +196,9 @@ int show_interrupts(struct seq_file *p, void *v) if (!action) goto skip; seq_printf(p, "%3d: ", i); -#ifdef CONFIG_SMP + for_each_online_cpu(j) - seq_printf(p, "%10u ", kstat_irqs_cpu(i, j)); -#else - seq_printf(p, "%10u ", kstat_irqs(i)); -#endif + seq_printf(p, "%10u ", irq_desc_kstat_cpu(desc, j)); seq_printf(p, " %14s", irq_desc_get_chip(desc)->name); #ifndef PARISC_IRQ_CR16_COUNTS @@ -335,7 +312,7 @@ unsigned long txn_affinity_addr(unsigned int irq, int cpu) { #ifdef CONFIG_SMP struct irq_data *d = irq_get_irq_data(irq); - cpumask_copy(irq_data_get_affinity_mask(d), cpumask_of(cpu)); + irq_data_update_affinity(d, cpumask_of(cpu)); #endif return per_cpu(cpu_data, cpu).txn_addr; @@ -376,7 +353,11 @@ static inline int eirr_to_irq(unsigned long eirr) /* * IRQ STACK - used for irq handler */ +#ifdef CONFIG_64BIT +#define IRQ_STACK_SIZE (4096 << 4) /* 64k irq stack size */ +#else #define IRQ_STACK_SIZE (4096 << 3) /* 32k irq stack size */ +#endif union irq_stack_union { unsigned long stack[IRQ_STACK_SIZE/sizeof(unsigned long)]; @@ -384,7 +365,7 @@ union irq_stack_union { volatile unsigned int lock[1]; }; -DEFINE_PER_CPU(union irq_stack_union, irq_stack_union) = { +static DEFINE_PER_CPU(union irq_stack_union, irq_stack_union) = { .slock = { 1,1,1,1 }, }; #endif @@ -397,8 +378,7 @@ static inline void stack_overflow_check(struct pt_regs *regs) #ifdef CONFIG_DEBUG_STACKOVERFLOW #define STACK_MARGIN (256*6) - /* Our stack starts directly behind the thread_info struct. */ - unsigned long stack_start = (unsigned long) current_thread_info(); + unsigned long stack_start = (unsigned long) task_stack_page(current); unsigned long sp = regs->gr[30]; unsigned long stack_usage; unsigned int *last_usage; @@ -474,7 +454,7 @@ static void execute_on_irq_stack(void *func, unsigned long param1) union_ptr = &per_cpu(irq_stack_union, smp_processor_id()); irq_stack = (unsigned long) &union_ptr->stack; irq_stack = ALIGN(irq_stack + sizeof(irq_stack_union.slock), - 64); /* align for stack frame usage */ + FRAME_ALIGN); /* align for stack frame usage */ /* We may be called recursive. If we are already using the irq stack, * just continue to use it. Use spinlocks to serialize @@ -497,14 +477,16 @@ static void execute_on_irq_stack(void *func, unsigned long param1) *irq_stack_in_use = 1; } +#ifdef CONFIG_SOFTIRQ_ON_OWN_STACK void do_softirq_own_stack(void) { execute_on_irq_stack(__do_softirq, 0); } +#endif #endif /* CONFIG_IRQSTACKS */ /* ONLY called from entry.S:intr_extint() */ -void do_cpu_irq_mask(struct pt_regs *regs) +asmlinkage void do_cpu_irq_mask(struct pt_regs *regs) { struct pt_regs *old_regs; unsigned long eirr_val; @@ -516,7 +498,7 @@ void do_cpu_irq_mask(struct pt_regs *regs) old_regs = set_irq_regs(regs); local_irq_disable(); - irq_enter(); + irq_enter_rcu(); eirr_val = mfctl(23) & cpu_eiem & per_cpu(local_ack_eiem, cpu); if (!eirr_val) @@ -551,7 +533,7 @@ void do_cpu_irq_mask(struct pt_regs *regs) #endif /* CONFIG_IRQSTACKS */ out: - irq_exit(); + irq_exit_rcu(); set_irq_regs(old_regs); return; @@ -560,37 +542,27 @@ void do_cpu_irq_mask(struct pt_regs *regs) goto out; } -static struct irqaction timer_action = { - .handler = timer_interrupt, - .name = "timer", - .flags = IRQF_TIMER | IRQF_PERCPU | IRQF_IRQPOLL, -}; - -#ifdef CONFIG_SMP -static struct irqaction ipi_action = { - .handler = ipi_interrupt, - .name = "IPI", - .flags = IRQF_PERCPU, -}; -#endif - static void claim_cpu_irqs(void) { + unsigned long flags = IRQF_TIMER | IRQF_PERCPU | IRQF_IRQPOLL; int i; + for (i = CPU_IRQ_BASE; i <= CPU_IRQ_MAX; i++) { irq_set_chip_and_handler(i, &cpu_interrupt_type, handle_percpu_irq); } irq_set_handler(TIMER_IRQ, handle_percpu_irq); - setup_irq(TIMER_IRQ, &timer_action); + if (request_irq(TIMER_IRQ, timer_interrupt, flags, "timer", NULL)) + pr_err("Failed to register timer interrupt\n"); #ifdef CONFIG_SMP irq_set_handler(IPI_IRQ, handle_percpu_irq); - setup_irq(IPI_IRQ, &ipi_action); + if (request_irq(IPI_IRQ, ipi_interrupt, IRQF_PERCPU, "IPI", NULL)) + pr_err("Failed to register IPI interrupt\n"); #endif } -void __init init_IRQ(void) +void init_IRQ(void) { local_irq_disable(); /* PARANOID - should already be disabled */ mtctl(~0UL, 23); /* EIRR : clear all pending external intr */ |