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irqchip: armada-370-xp: Enable the PMU interrupts

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In order to let the Performance Monitoring Unit interrupts flowing in the MPIC,
we need to unmask these interrupts in the Coherency Fabric Local Interrupt Mask
Register.

Since this register is a CPU-local register, unmasking this interrupt needs to
be done on the boot CPU when the driver initializes, but also on the secondary
CPU when they are brought up.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Link: https://lkml.kernel.org/r/1425379400-4346-4-git-send-email-maxime.ripard@free-electrons.com
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
This commit is contained in:
Maxime Ripard 2015-03-03 11:43:16 +01:00 committed by Jason Cooper
parent 2c299de527
commit 28da06dfd9
1 changed files with 20 additions and 3 deletions
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23
drivers/irqchip/irq-armada-370-xp.c
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@ -38,6 +38,8 @@
/* Interrupt Controller Registers Map */
#define ARMADA_370_XP_INT_SET_MASK_OFFS (0x48)
#define ARMADA_370_XP_INT_CLEAR_MASK_OFFS (0x4C)
#define ARMADA_370_XP_INT_FABRIC_MASK_OFFS (0x54)
#define ARMADA_370_XP_INT_CAUSE_PERF(cpu) (1 << cpu)
#define ARMADA_370_XP_INT_CONTROL (0x00)
#define ARMADA_370_XP_INT_SET_ENABLE_OFFS (0x30)
@ -56,6 +58,7 @@
#define ARMADA_370_XP_MAX_PER_CPU_IRQS (28)
#define ARMADA_370_XP_TIMER0_PER_CPU_IRQ (5)
#define ARMADA_370_XP_FABRIC_IRQ (3)
#define IPI_DOORBELL_START (0)
#define IPI_DOORBELL_END (8)
@ -81,6 +84,7 @@ static inline bool is_percpu_irq(irq_hw_number_t irq)
{
switch (irq) {
case ARMADA_370_XP_TIMER0_PER_CPU_IRQ:
case ARMADA_370_XP_FABRIC_IRQ:
return true;
default:
return false;
@ -340,6 +344,15 @@ static void armada_xp_mpic_smp_cpu_init(void)
writel(0, per_cpu_int_base + ARMADA_370_XP_INT_CLEAR_MASK_OFFS);
}
static void armada_xp_mpic_perf_init(void)
{
unsigned long cpuid = cpu_logical_map(smp_processor_id());
/* Enable Performance Counter Overflow interrupts */
writel(ARMADA_370_XP_INT_CAUSE_PERF(cpuid),
per_cpu_int_base + ARMADA_370_XP_INT_FABRIC_MASK_OFFS);
}
#ifdef CONFIG_SMP
static void armada_mpic_send_doorbell(const struct cpumask *mask,
unsigned int irq)
@ -365,8 +378,10 @@ static void armada_mpic_send_doorbell(const struct cpumask *mask,
static int armada_xp_mpic_secondary_init(struct notifier_block *nfb,
unsigned long action, void *hcpu)
{
if (action == CPU_STARTING || action == CPU_STARTING_FROZEN)
if (action == CPU_STARTING || action == CPU_STARTING_FROZEN) {
armada_xp_mpic_perf_init();
armada_xp_mpic_smp_cpu_init();
}
return NOTIFY_OK;
}
@ -379,8 +394,10 @@ static struct notifier_block armada_370_xp_mpic_cpu_notifier = {
static int mpic_cascaded_secondary_init(struct notifier_block *nfb,
unsigned long action, void *hcpu)
{
if (action == CPU_STARTING || action == CPU_STARTING_FROZEN)
if (action == CPU_STARTING || action == CPU_STARTING_FROZEN) {
armada_xp_mpic_perf_init();
enable_percpu_irq(parent_irq, IRQ_TYPE_NONE);
}
return NOTIFY_OK;
}
@ -389,7 +406,6 @@ static struct notifier_block mpic_cascaded_cpu_notifier = {
.notifier_call = mpic_cascaded_secondary_init,
.priority = 100,
};
#endif /* CONFIG_SMP */
static struct irq_domain_ops armada_370_xp_mpic_irq_ops = {
@ -599,6 +615,7 @@ static int __init armada_370_xp_mpic_of_init(struct device_node *node,
BUG_ON(!armada_370_xp_mpic_domain);
/* Setup for the boot CPU */
armada_xp_mpic_perf_init();
armada_xp_mpic_smp_cpu_init();
armada_370_xp_msi_init(node, main_int_res.start);