diff options
Diffstat (limited to 'arch/x86/kernel/apic/io_apic.c')
| -rw-r--r-- | arch/x86/kernel/apic/io_apic.c | 99 |
1 files changed, 98 insertions, 1 deletions
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c index 563f450..a602b35 100644 --- a/arch/x86/kernel/apic/io_apic.c +++ b/arch/x86/kernel/apic/io_apic.c @@ -87,6 +87,14 @@ static DEFINE_RAW_SPINLOCK(vector_lock); static DEFINE_MUTEX(ioapic_mutex); static unsigned int ioapic_dynirq_base; +struct mp_pin_info { + int trigger; + int polarity; + int node; + int set; + u32 count; +}; + static struct ioapic { /* * # of IRQ routing registers @@ -102,6 +110,7 @@ static struct ioapic { struct mp_ioapic_gsi gsi_config; struct ioapic_domain_cfg irqdomain_cfg; struct irq_domain *irqdomain; + struct mp_pin_info *pin_info; DECLARE_BITMAP(pin_programmed, MP_MAX_IOAPIC_PIN + 1); } ioapics[MAX_IO_APICS]; @@ -147,6 +156,11 @@ static inline int mp_init_irq_at_boot(int ioapic, int irq) return ioapic == 0 || (irq >= 0 && irq < nr_legacy_irqs()); } +static inline struct mp_pin_info *mp_pin_info(int ioapic_idx, int pin) +{ + return ioapics[ioapic_idx].pin_info + pin; +} + static inline struct irq_domain *mp_ioapic_irqdomain(int ioapic) { return ioapics[ioapic].irqdomain; @@ -1006,6 +1020,7 @@ static int mp_map_pin_to_irq(u32 gsi, int idx, int ioapic, int pin, { int irq; struct irq_domain *domain = mp_ioapic_irqdomain(ioapic); + struct mp_pin_info *info = mp_pin_info(ioapic, pin); /* * Don't use irqdomain to manage ISA IRQs because there may be @@ -1034,6 +1049,13 @@ static int mp_map_pin_to_irq(u32 gsi, int idx, int ioapic, int pin, irq = irq_find_mapping(domain, pin); if (irq <= 0 && (flags & IOAPIC_MAP_ALLOC)) irq = alloc_irq_from_domain(domain, gsi, pin); + + if (flags & IOAPIC_MAP_ALLOC) { + if (irq > 0) + info->count++; + else if (info->count == 0) + info->set = 0; + } mutex_unlock(&ioapic_mutex); return irq > 0 ? irq : -1; @@ -2923,18 +2945,27 @@ out: static int mp_irqdomain_create(int ioapic) { + size_t size; int hwirqs = mp_ioapic_pin_count(ioapic); struct ioapic *ip = &ioapics[ioapic]; struct ioapic_domain_cfg *cfg = &ip->irqdomain_cfg; struct mp_ioapic_gsi *gsi_cfg = mp_ioapic_gsi_routing(ioapic); + size = sizeof(struct mp_pin_info) * mp_ioapic_pin_count(ioapic); + ip->pin_info = kzalloc(size, GFP_KERNEL); + if (!ip->pin_info) + return -ENOMEM; + if (cfg->type == IOAPIC_DOMAIN_INVALID) return 0; ip->irqdomain = irq_domain_add_linear(cfg->dev, hwirqs, cfg->ops, (void *)(long)ioapic); - if(!ip->irqdomain) + if(!ip->irqdomain) { + kfree(ip->pin_info); + ip->pin_info = NULL; return -ENOMEM; + } if (cfg->type == IOAPIC_DOMAIN_LEGACY || cfg->type == IOAPIC_DOMAIN_STRICT) @@ -3902,6 +3933,72 @@ void __init mp_register_ioapic(int id, u32 address, u32 gsi_base, nr_ioapics++; } +int mp_irqdomain_map(struct irq_domain *domain, unsigned int virq, + irq_hw_number_t hwirq) +{ + int ioapic = (int)(long)domain->host_data; + struct mp_pin_info *info = mp_pin_info(ioapic, hwirq); + struct io_apic_irq_attr attr; + + /* + * Skip the timer IRQ if there's a quirk handler installed and if it + * returns 1: + */ + if (apic->multi_timer_check && + apic->multi_timer_check(ioapic, virq)) + return 0; + + /* Get default attribute if not set by caller yet */ + if (!info->set) { + u32 gsi = mp_pin_to_gsi(ioapic, hwirq); + + if (acpi_get_override_irq(gsi, &info->trigger, + &info->polarity) < 0) { + /* + * PCI interrupts are always polarity one level + * triggered. + */ + info->trigger = 1; + info->polarity = 1; + } + info->node = NUMA_NO_NODE; + info->set = 1; + } + set_io_apic_irq_attr(&attr, ioapic, hwirq, info->trigger, + info->polarity); + + return io_apic_setup_irq_pin(virq, info->node, &attr); +} + +int mp_set_gsi_attr(u32 gsi, int trigger, int polarity, int node) +{ + int ret = 0; + int ioapic, pin; + struct mp_pin_info *info; + + ioapic = mp_find_ioapic(gsi); + if (ioapic < 0) + return -ENODEV; + + pin = mp_find_ioapic_pin(ioapic, gsi); + info = mp_pin_info(ioapic, pin); + trigger = trigger ? 1 : 0; + polarity = polarity ? 1 : 0; + + mutex_lock(&ioapic_mutex); + if (!info->set) { + info->trigger = trigger; + info->polarity = polarity; + info->node = node; + info->set = 1; + } else if (info->trigger != trigger || info->polarity != polarity) { + ret = -EBUSY; + } + mutex_unlock(&ioapic_mutex); + + return ret; +} + /* Enable IOAPIC early just for system timer */ void __init pre_init_apic_IRQ0(void) { |
