diff options
Diffstat (limited to 'drivers/irqchip/irq-mips-gic.c')
| -rw-r--r-- | drivers/irqchip/irq-mips-gic.c | 72 |
1 files changed, 56 insertions, 16 deletions
diff --git a/drivers/irqchip/irq-mips-gic.c b/drivers/irqchip/irq-mips-gic.c index 6fdcc1552fab..60f644279803 100644 --- a/drivers/irqchip/irq-mips-gic.c +++ b/drivers/irqchip/irq-mips-gic.c @@ -8,6 +8,7 @@ */ #include <linux/bitmap.h> #include <linux/clocksource.h> +#include <linux/cpuhotplug.h> #include <linux/init.h> #include <linux/interrupt.h> #include <linux/irq.h> @@ -55,6 +56,11 @@ static struct irq_chip gic_level_irq_controller, gic_edge_irq_controller; DECLARE_BITMAP(ipi_resrv, GIC_MAX_INTRS); DECLARE_BITMAP(ipi_available, GIC_MAX_INTRS); +static struct gic_all_vpes_chip_data { + u32 map; + bool mask; +} gic_all_vpes_chip_data[GIC_NUM_LOCAL_INTRS]; + static void gic_clear_pcpu_masks(unsigned int intr) { unsigned int i; @@ -338,13 +344,17 @@ static struct irq_chip gic_local_irq_controller = { static void gic_mask_local_irq_all_vpes(struct irq_data *d) { - int intr = GIC_HWIRQ_TO_LOCAL(d->hwirq); - int i; + struct gic_all_vpes_chip_data *cd; unsigned long flags; + int intr, cpu; + + intr = GIC_HWIRQ_TO_LOCAL(d->hwirq); + cd = irq_data_get_irq_chip_data(d); + cd->mask = false; spin_lock_irqsave(&gic_lock, flags); - for (i = 0; i < gic_vpes; i++) { - write_gic_vl_other(mips_cm_vp_id(i)); + for_each_online_cpu(cpu) { + write_gic_vl_other(mips_cm_vp_id(cpu)); write_gic_vo_rmask(BIT(intr)); } spin_unlock_irqrestore(&gic_lock, flags); @@ -352,22 +362,40 @@ static void gic_mask_local_irq_all_vpes(struct irq_data *d) static void gic_unmask_local_irq_all_vpes(struct irq_data *d) { - int intr = GIC_HWIRQ_TO_LOCAL(d->hwirq); - int i; + struct gic_all_vpes_chip_data *cd; unsigned long flags; + int intr, cpu; + + intr = GIC_HWIRQ_TO_LOCAL(d->hwirq); + cd = irq_data_get_irq_chip_data(d); + cd->mask = true; spin_lock_irqsave(&gic_lock, flags); - for (i = 0; i < gic_vpes; i++) { - write_gic_vl_other(mips_cm_vp_id(i)); + for_each_online_cpu(cpu) { + write_gic_vl_other(mips_cm_vp_id(cpu)); write_gic_vo_smask(BIT(intr)); } spin_unlock_irqrestore(&gic_lock, flags); } +static void gic_all_vpes_irq_cpu_online(struct irq_data *d) +{ + struct gic_all_vpes_chip_data *cd; + unsigned int intr; + + intr = GIC_HWIRQ_TO_LOCAL(d->hwirq); + cd = irq_data_get_irq_chip_data(d); + + write_gic_vl_map(intr, cd->map); + if (cd->mask) + write_gic_vl_smask(BIT(intr)); +} + static struct irq_chip gic_all_vpes_local_irq_controller = { - .name = "MIPS GIC Local", - .irq_mask = gic_mask_local_irq_all_vpes, - .irq_unmask = gic_unmask_local_irq_all_vpes, + .name = "MIPS GIC Local", + .irq_mask = gic_mask_local_irq_all_vpes, + .irq_unmask = gic_unmask_local_irq_all_vpes, + .irq_cpu_online = gic_all_vpes_irq_cpu_online, }; static void __gic_irq_dispatch(void) @@ -424,9 +452,10 @@ static int gic_irq_domain_xlate(struct irq_domain *d, struct device_node *ctrlr, static int gic_irq_domain_map(struct irq_domain *d, unsigned int virq, irq_hw_number_t hwirq) { + struct gic_all_vpes_chip_data *cd; unsigned long flags; unsigned int intr; - int err, i; + int err, cpu; u32 map; if (hwirq >= GIC_SHARED_HWIRQ_BASE) { @@ -459,9 +488,11 @@ static int gic_irq_domain_map(struct irq_domain *d, unsigned int virq, * the rest of the MIPS kernel code does not use the * percpu IRQ API for them. */ + cd = &gic_all_vpes_chip_data[intr]; + cd->map = map; err = irq_domain_set_hwirq_and_chip(d, virq, hwirq, &gic_all_vpes_local_irq_controller, - NULL); + cd); if (err) return err; @@ -484,8 +515,8 @@ static int gic_irq_domain_map(struct irq_domain *d, unsigned int virq, return -EPERM; spin_lock_irqsave(&gic_lock, flags); - for (i = 0; i < gic_vpes; i++) { - write_gic_vl_other(mips_cm_vp_id(i)); + for_each_online_cpu(cpu) { + write_gic_vl_other(mips_cm_vp_id(cpu)); write_gic_vo_map(intr, map); } spin_unlock_irqrestore(&gic_lock, flags); @@ -622,6 +653,13 @@ static const struct irq_domain_ops gic_ipi_domain_ops = { .match = gic_ipi_domain_match, }; +static int gic_cpu_startup(unsigned int cpu) +{ + /* Invoke irq_cpu_online callbacks to enable desired interrupts */ + irq_cpu_online(); + + return 0; +} static int __init gic_of_init(struct device_node *node, struct device_node *parent) @@ -768,6 +806,8 @@ static int __init gic_of_init(struct device_node *node, } } - return 0; + return cpuhp_setup_state(CPUHP_AP_IRQ_MIPS_GIC_STARTING, + "irqchip/mips/gic:starting", + gic_cpu_startup, NULL); } IRQCHIP_DECLARE(mips_gic, "mti,gic", gic_of_init); |