diff options
Diffstat (limited to 'arch/i386/kernel/io_apic.c')
-rw-r--r-- | arch/i386/kernel/io_apic.c | 70 |
1 files changed, 44 insertions, 26 deletions
diff --git a/arch/i386/kernel/io_apic.c b/arch/i386/kernel/io_apic.c index a62df3e764c..ec9ea0269d3 100644 --- a/arch/i386/kernel/io_apic.c +++ b/arch/i386/kernel/io_apic.c @@ -38,6 +38,7 @@ #include <asm/desc.h> #include <asm/timer.h> #include <asm/i8259.h> +#include <asm/nmi.h> #include <mach_apic.h> @@ -50,6 +51,7 @@ atomic_t irq_mis_count; static struct { int pin, apic; } ioapic_i8259 = { -1, -1 }; static DEFINE_SPINLOCK(ioapic_lock); +static DEFINE_SPINLOCK(vector_lock); int timer_over_8254 __initdata = 1; @@ -579,7 +581,7 @@ static int balanced_irq(void *unused) /* push everything to CPU 0 to give us a starting point. */ for (i = 0 ; i < NR_IRQS ; i++) { - pending_irq_cpumask[i] = cpumask_of_cpu(0); + irq_desc[i].pending_mask = cpumask_of_cpu(0); set_pending_irq(i, cpumask_of_cpu(0)); } @@ -1161,10 +1163,17 @@ u8 irq_vector[NR_IRQ_VECTORS] __read_mostly = { FIRST_DEVICE_VECTOR , 0 }; int assign_irq_vector(int irq) { static int current_vector = FIRST_DEVICE_VECTOR, offset = 0; + unsigned long flags; + int vector; + + BUG_ON(irq != AUTO_ASSIGN && (unsigned)irq >= NR_IRQ_VECTORS); - BUG_ON(irq >= NR_IRQ_VECTORS); - if (irq != AUTO_ASSIGN && IO_APIC_VECTOR(irq) > 0) + spin_lock_irqsave(&vector_lock, flags); + + if (irq != AUTO_ASSIGN && IO_APIC_VECTOR(irq) > 0) { + spin_unlock_irqrestore(&vector_lock, flags); return IO_APIC_VECTOR(irq); + } next: current_vector += 8; if (current_vector == SYSCALL_VECTOR) @@ -1172,16 +1181,21 @@ next: if (current_vector >= FIRST_SYSTEM_VECTOR) { offset++; - if (!(offset%8)) + if (!(offset%8)) { + spin_unlock_irqrestore(&vector_lock, flags); return -ENOSPC; + } current_vector = FIRST_DEVICE_VECTOR + offset; } - vector_irq[current_vector] = irq; + vector = current_vector; + vector_irq[vector] = irq; if (irq != AUTO_ASSIGN) - IO_APIC_VECTOR(irq) = current_vector; + IO_APIC_VECTOR(irq) = vector; + + spin_unlock_irqrestore(&vector_lock, flags); - return current_vector; + return vector; } static struct hw_interrupt_type ioapic_level_type; @@ -1191,23 +1205,18 @@ static struct hw_interrupt_type ioapic_edge_type; #define IOAPIC_EDGE 0 #define IOAPIC_LEVEL 1 -static inline void ioapic_register_intr(int irq, int vector, unsigned long trigger) +static void ioapic_register_intr(int irq, int vector, unsigned long trigger) { - if (use_pci_vector() && !platform_legacy_irq(irq)) { - if ((trigger == IOAPIC_AUTO && IO_APIC_irq_trigger(irq)) || - trigger == IOAPIC_LEVEL) - irq_desc[vector].handler = &ioapic_level_type; - else - irq_desc[vector].handler = &ioapic_edge_type; - set_intr_gate(vector, interrupt[vector]); - } else { - if ((trigger == IOAPIC_AUTO && IO_APIC_irq_trigger(irq)) || - trigger == IOAPIC_LEVEL) - irq_desc[irq].handler = &ioapic_level_type; - else - irq_desc[irq].handler = &ioapic_edge_type; - set_intr_gate(vector, interrupt[irq]); - } + unsigned idx; + + idx = use_pci_vector() && !platform_legacy_irq(irq) ? vector : irq; + + if ((trigger == IOAPIC_AUTO && IO_APIC_irq_trigger(irq)) || + trigger == IOAPIC_LEVEL) + irq_desc[idx].chip = &ioapic_level_type; + else + irq_desc[idx].chip = &ioapic_edge_type; + set_intr_gate(vector, interrupt[idx]); } static void __init setup_IO_APIC_irqs(void) @@ -1318,7 +1327,7 @@ static void __init setup_ExtINT_IRQ0_pin(unsigned int apic, unsigned int pin, in * The timer IRQ doesn't have to know that behind the * scene we have a 8259A-master in AEOI mode ... */ - irq_desc[0].handler = &ioapic_edge_type; + irq_desc[0].chip = &ioapic_edge_type; /* * Add it to the IO-APIC irq-routing table: @@ -2062,6 +2071,13 @@ static void set_ioapic_affinity_vector (unsigned int vector, #endif #endif +static int ioapic_retrigger(unsigned int irq) +{ + send_IPI_self(IO_APIC_VECTOR(irq)); + + return 1; +} + /* * Level and edge triggered IO-APIC interrupts need different handling, * so we use two separate IRQ descriptors. Edge triggered IRQs can be @@ -2081,6 +2097,7 @@ static struct hw_interrupt_type ioapic_edge_type __read_mostly = { #ifdef CONFIG_SMP .set_affinity = set_ioapic_affinity, #endif + .retrigger = ioapic_retrigger, }; static struct hw_interrupt_type ioapic_level_type __read_mostly = { @@ -2094,6 +2111,7 @@ static struct hw_interrupt_type ioapic_level_type __read_mostly = { #ifdef CONFIG_SMP .set_affinity = set_ioapic_affinity, #endif + .retrigger = ioapic_retrigger, }; static inline void init_IO_APIC_traps(void) @@ -2128,7 +2146,7 @@ static inline void init_IO_APIC_traps(void) make_8259A_irq(irq); else /* Strange. Oh, well.. */ - irq_desc[irq].handler = &no_irq_type; + irq_desc[irq].chip = &no_irq_type; } } } @@ -2344,7 +2362,7 @@ static inline void check_timer(void) printk(KERN_INFO "...trying to set up timer as Virtual Wire IRQ..."); disable_8259A_irq(0); - irq_desc[0].handler = &lapic_irq_type; + irq_desc[0].chip = &lapic_irq_type; apic_write_around(APIC_LVT0, APIC_DM_FIXED | vector); /* Fixed mode */ enable_8259A_irq(0); |