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authorThomas Bogendoerfer <tbogendoerfer@suse.de>2019-02-19 16:57:20 +0100
committerPaul Burton <paul.burton@mips.com>2019-02-19 12:46:03 -0800
commit69a07a41d908f9df48393bbab179daded8cfab66 (patch)
tree6764897f28cee05ecd539010ce61c4138b3bfdc5 /arch/mips/sgi-ip27/ip27-timer.c
parentMIPS: SGI-IP27: do boot CPU init later (diff)
downloadlinux-dev-69a07a41d908f9df48393bbab179daded8cfab66.tar.xz
linux-dev-69a07a41d908f9df48393bbab179daded8cfab66.zip
MIPS: SGI-IP27: rework HUB interrupts
This commit rearranges the HUB interrupt code by using MIPS_IRQ_CPU interrupt handling code and modern Linux IRQ framework features to get rid of global arrays. It also adds support for irq affinity setting. Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de> Signed-off-by: Paul Burton <paul.burton@mips.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: James Hogan <jhogan@kernel.org> Cc: linux-mips@vger.kernel.org Cc: linux-kernel@vger.kernel.org
Diffstat (limited to '')
-rw-r--r--arch/mips/sgi-ip27/ip27-timer.c42
1 files changed, 7 insertions, 35 deletions
diff --git a/arch/mips/sgi-ip27/ip27-timer.c b/arch/mips/sgi-ip27/ip27-timer.c
index 9d55247533a5..9b4b9ac621a3 100644
--- a/arch/mips/sgi-ip27/ip27-timer.c
+++ b/arch/mips/sgi-ip27/ip27-timer.c
@@ -38,20 +38,6 @@
#include <asm/sn/sn0/hubio.h>
#include <asm/pci/bridge.h>
-static void enable_rt_irq(struct irq_data *d)
-{
-}
-
-static void disable_rt_irq(struct irq_data *d)
-{
-}
-
-static struct irq_chip rt_irq_type = {
- .name = "SN HUB RT timer",
- .irq_mask = disable_rt_irq,
- .irq_unmask = enable_rt_irq,
-};
-
static int rt_next_event(unsigned long delta, struct clock_event_device *evt)
{
unsigned int cpu = smp_processor_id();
@@ -65,8 +51,6 @@ static int rt_next_event(unsigned long delta, struct clock_event_device *evt)
return LOCAL_HUB_L(PI_RT_COUNT) >= cnt ? -ETIME : 0;
}
-unsigned int rt_timer_irq;
-
static DEFINE_PER_CPU(struct clock_event_device, hub_rt_clockevent);
static DEFINE_PER_CPU(char [11], hub_rt_name);
@@ -87,6 +71,7 @@ static irqreturn_t hub_rt_counter_handler(int irq, void *dev_id)
struct irqaction hub_rt_irqaction = {
.handler = hub_rt_counter_handler,
+ .percpu_dev_id = &hub_rt_clockevent,
.flags = IRQF_PERCPU | IRQF_TIMER,
.name = "hub-rt",
};
@@ -107,7 +92,6 @@ void hub_rt_clock_event_init(void)
unsigned int cpu = smp_processor_id();
struct clock_event_device *cd = &per_cpu(hub_rt_clockevent, cpu);
unsigned char *name = per_cpu(hub_rt_name, cpu);
- int irq = rt_timer_irq;
sprintf(name, "hub-rt %d", cpu);
cd->name = name;
@@ -118,29 +102,19 @@ void hub_rt_clock_event_init(void)
cd->min_delta_ns = clockevent_delta2ns(0x300, cd);
cd->min_delta_ticks = 0x300;
cd->rating = 200;
- cd->irq = irq;
+ cd->irq = IP27_RT_TIMER_IRQ;
cd->cpumask = cpumask_of(cpu);
cd->set_next_event = rt_next_event;
clockevents_register_device(cd);
+
+ enable_percpu_irq(IP27_RT_TIMER_IRQ, IRQ_TYPE_NONE);
}
static void __init hub_rt_clock_event_global_init(void)
{
- int irq;
-
- do {
- smp_wmb();
- irq = rt_timer_irq;
- if (irq)
- break;
-
- irq = allocate_irqno();
- if (irq < 0)
- panic("Allocation of irq number for timer failed");
- } while (xchg(&rt_timer_irq, irq));
-
- irq_set_chip_and_handler(irq, &rt_irq_type, handle_percpu_irq);
- setup_irq(irq, &hub_rt_irqaction);
+ irq_set_handler(IP27_RT_TIMER_IRQ, handle_percpu_devid_irq);
+ irq_set_percpu_devid(IP27_RT_TIMER_IRQ);
+ setup_percpu_irq(IP27_RT_TIMER_IRQ, &hub_rt_irqaction);
}
static u64 hub_rt_read(struct clocksource *cs)
@@ -194,8 +168,6 @@ void cpu_time_init(void)
panic("No information about myself?");
printk("CPU %d clock is %dMHz.\n", smp_processor_id(), cpu->cpu_speed);
-
- set_c0_status(SRB_TIMOCLK);
}
void hub_rtc_init(cnodeid_t cnode)