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authorJonas Gorski2014-07-12 12:49:42 +0200
committerRalf Baechle2014-07-30 15:30:23 +0200
commitb37f0f691e69b0325b6f448679e0e338dbd076e2 (patch)
tree4275bf54d1d80f3e445bf9243c07371284c4525d /arch
parent553e25b3da2f1c8e30cc20499ae3593815df97e9 (diff)
MIPS: BCM63xx: Allow setting affinity for IPIC
Wire up the set_affinity call for the internal PIC if booting on a cpu supporting it. Affinity is kept to boot cpu as default. Signed-off-by: Jonas Gorski <jogo@openwrt.org> Cc: linux-mips@linux-mips.org Cc: John Crispin <blogic@openwrt.org> Cc: Maxime Bizon <mbizon@freebox.fr> Cc: Florian Fainelli <florian@openwrt.org> Cc: Kevin Cernekee <cernekee@gmail.com> Cc: Gregory Fong <gregory.0xf0@gmail.com> Patchwork: https://patchwork.linux-mips.org/patch/7323/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/mips/bcm63xx/irq.c46
1 files changed, 40 insertions, 6 deletions
diff --git a/arch/mips/bcm63xx/irq.c b/arch/mips/bcm63xx/irq.c
index a53305fbedb8..37eb2d1fa69a 100644
--- a/arch/mips/bcm63xx/irq.c
+++ b/arch/mips/bcm63xx/irq.c
@@ -32,7 +32,7 @@ static unsigned int ext_irq_count;
static unsigned int ext_irq_start, ext_irq_end;
static unsigned int ext_irq_cfg_reg1, ext_irq_cfg_reg2;
static void (*internal_irq_mask)(struct irq_data *d);
-static void (*internal_irq_unmask)(struct irq_data *d);
+static void (*internal_irq_unmask)(struct irq_data *d, const struct cpumask *m);
static inline u32 get_ext_irq_perf_reg(int irq)
@@ -51,6 +51,20 @@ static inline void handle_internal(int intbit)
do_IRQ(intbit + IRQ_INTERNAL_BASE);
}
+static inline int enable_irq_for_cpu(int cpu, struct irq_data *d,
+ const struct cpumask *m)
+{
+ bool enable = cpu_online(cpu);
+
+#ifdef CONFIG_SMP
+ if (m)
+ enable &= cpu_isset(cpu, *m);
+ else if (irqd_affinity_was_set(d))
+ enable &= cpu_isset(cpu, *d->affinity);
+#endif
+ return enable;
+}
+
/*
* dispatch internal devices IRQ (uart, enet, watchdog, ...). do not
* prioritize any interrupt relatively to another. the static counter
@@ -117,7 +131,8 @@ static void __internal_irq_mask_##width(struct irq_data *d) \
spin_unlock_irqrestore(&ipic_lock, flags); \
} \
\
-static void __internal_irq_unmask_##width(struct irq_data *d) \
+static void __internal_irq_unmask_##width(struct irq_data *d, \
+ const struct cpumask *m) \
{ \
u32 val; \
unsigned irq = d->irq - IRQ_INTERNAL_BASE; \
@@ -132,7 +147,7 @@ static void __internal_irq_unmask_##width(struct irq_data *d) \
break; \
\
val = bcm_readl(irq_mask_addr[cpu] + reg * sizeof(u32));\
- if (cpu_online(cpu)) \
+ if (enable_irq_for_cpu(cpu, d, m)) \
val |= (1 << bit); \
else \
val &= ~(1 << bit); \
@@ -189,7 +204,7 @@ static void bcm63xx_internal_irq_mask(struct irq_data *d)
static void bcm63xx_internal_irq_unmask(struct irq_data *d)
{
- internal_irq_unmask(d);
+ internal_irq_unmask(d, NULL);
}
/*
@@ -237,7 +252,8 @@ static void bcm63xx_external_irq_unmask(struct irq_data *d)
spin_unlock_irqrestore(&epic_lock, flags);
if (is_ext_irq_cascaded)
- internal_irq_unmask(irq_get_irq_data(irq + ext_irq_start));
+ internal_irq_unmask(irq_get_irq_data(irq + ext_irq_start),
+ NULL);
}
static void bcm63xx_external_irq_clear(struct irq_data *d)
@@ -356,6 +372,18 @@ static int bcm63xx_external_irq_set_type(struct irq_data *d,
return IRQ_SET_MASK_OK_NOCOPY;
}
+#ifdef CONFIG_SMP
+static int bcm63xx_internal_set_affinity(struct irq_data *data,
+ const struct cpumask *dest,
+ bool force)
+{
+ if (!irqd_irq_disabled(data))
+ internal_irq_unmask(data, dest);
+
+ return 0;
+}
+#endif
+
static struct irq_chip bcm63xx_internal_irq_chip = {
.name = "bcm63xx_ipic",
.irq_mask = bcm63xx_internal_irq_mask,
@@ -523,7 +551,13 @@ void __init arch_init_irq(void)
setup_irq(MIPS_CPU_IRQ_BASE + 2, &cpu_ip2_cascade_action);
#ifdef CONFIG_SMP
- if (is_ext_irq_cascaded)
+ if (is_ext_irq_cascaded) {
setup_irq(MIPS_CPU_IRQ_BASE + 3, &cpu_ip3_cascade_action);
+ bcm63xx_internal_irq_chip.irq_set_affinity =
+ bcm63xx_internal_set_affinity;
+
+ cpumask_clear(irq_default_affinity);
+ cpumask_set_cpu(smp_processor_id(), irq_default_affinity);
+ }
#endif
}