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Message-Id: <20190623132436.461437795@linutronix.de>
Date: Sun, 23 Jun 2019 15:24:06 +0200
From: Thomas Gleixner <tglx@...utronix.de>
To: LKML <linux-kernel@...r.kernel.org>
Cc: x86@...nel.org, Peter Zijlstra <peterz@...radead.org>,
Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>,
Ashok Raj <ashok.raj@...el.com>,
Andi Kleen <andi.kleen@...el.com>,
Suravee Suthikulpanit <Suravee.Suthikulpanit@....com>,
Stephane Eranian <eranian@...gle.com>,
Ravi Shankar <ravi.v.shankar@...el.com>
Subject: [patch 26/29] x86/hpet: Consolidate clockevent functions
Now that the legacy clockevent is wrapped in a hpet_channel struct most
clockevent functions can be shared between the legacy and the MSI based
clockevents.
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
---
arch/x86/kernel/hpet.c | 92 +++++++++++++------------------------------------
1 file changed, 25 insertions(+), 67 deletions(-)
--- a/arch/x86/kernel/hpet.c
+++ b/arch/x86/kernel/hpet.c
@@ -310,8 +310,9 @@ static void hpet_legacy_clockevent_regis
pr_debug("Clockevent registered\n");
}
-static int hpet_set_periodic(struct clock_event_device *evt, int channel)
+static int hpet_clkevt_set_periodic(struct clock_event_device *evt)
{
+ unsigned int channel = clockevent_to_channel(evt)->num;
unsigned int cfg, cmp, now;
uint64_t delta;
@@ -340,8 +341,9 @@ static int hpet_set_periodic(struct cloc
return 0;
}
-static int hpet_set_oneshot(struct clock_event_device *evt, int channel)
+static int hpet_clkevt_set_oneshot(struct clock_event_device *evt)
{
+ unsigned int channel = clockevent_to_channel(evt)->num;
unsigned int cfg;
cfg = hpet_readl(HPET_Tn_CFG(channel));
@@ -352,8 +354,9 @@ static int hpet_set_oneshot(struct clock
return 0;
}
-static int hpet_shutdown(struct clock_event_device *evt, int channel)
+static int hpet_clkevt_shutdown(struct clock_event_device *evt)
{
+ unsigned int channel = clockevent_to_channel(evt)->num;
unsigned int cfg;
cfg = hpet_readl(HPET_Tn_CFG(channel));
@@ -363,15 +366,17 @@ static int hpet_shutdown(struct clock_ev
return 0;
}
-static int hpet_resume(struct clock_event_device *evt)
+static int hpet_clkevt_legacy_resume(struct clock_event_device *evt)
{
hpet_enable_legacy_int();
hpet_print_config();
return 0;
}
-static int hpet_next_event(unsigned long delta, int channel)
+static int
+hpet_clkevt_set_next_event(unsigned long delta, struct clock_event_device *evt)
{
+ unsigned int channel = clockevent_to_channel(evt)->num;
u32 cnt;
s32 res;
@@ -406,32 +411,6 @@ static int hpet_next_event(unsigned long
return res < HPET_MIN_CYCLES ? -ETIME : 0;
}
-static int hpet_legacy_shutdown(struct clock_event_device *evt)
-{
- return hpet_shutdown(evt, 0);
-}
-
-static int hpet_legacy_set_oneshot(struct clock_event_device *evt)
-{
- return hpet_set_oneshot(evt, 0);
-}
-
-static int hpet_legacy_set_periodic(struct clock_event_device *evt)
-{
- return hpet_set_periodic(evt, 0);
-}
-
-static int hpet_legacy_resume(struct clock_event_device *evt)
-{
- return hpet_resume(evt);
-}
-
-static int hpet_legacy_next_event(unsigned long delta,
- struct clock_event_device *evt)
-{
- return hpet_next_event(delta, 0);
-}
-
/*
* The HPET clock event device wrapped in a channel for conversion
*/
@@ -440,11 +419,11 @@ static struct hpet_channel hpet_channel0
.name = "hpet",
.features = CLOCK_EVT_FEAT_PERIODIC |
CLOCK_EVT_FEAT_ONESHOT,
- .set_state_periodic = hpet_legacy_set_periodic,
- .set_state_oneshot = hpet_legacy_set_oneshot,
- .set_state_shutdown = hpet_legacy_shutdown,
- .tick_resume = hpet_legacy_resume,
- .set_next_event = hpet_legacy_next_event,
+ .set_state_periodic = hpet_clkevt_set_periodic,
+ .set_state_oneshot = hpet_clkevt_set_oneshot,
+ .set_state_shutdown = hpet_clkevt_shutdown,
+ .tick_resume = hpet_clkevt_legacy_resume,
+ .set_next_event = hpet_clkevt_set_next_event,
.irq = 0,
.rating = 50,
}
@@ -481,22 +460,7 @@ void hpet_msi_write(struct hpet_channel
hpet_writel(msg->address_lo, HPET_Tn_ROUTE(hc->num) + 4);
}
-static int hpet_msi_shutdown(struct clock_event_device *evt)
-{
- return hpet_shutdown(evt, clockevent_to_channel(evt)->num);
-}
-
-static int hpet_msi_set_oneshot(struct clock_event_device *evt)
-{
- return hpet_set_oneshot(evt, clockevent_to_channel(evt)->num);
-}
-
-static int hpet_msi_set_periodic(struct clock_event_device *evt)
-{
- return hpet_set_periodic(evt, clockevent_to_channel(evt)->num);
-}
-
-static int hpet_msi_resume(struct clock_event_device *evt)
+static int hpet_clkevt_msi_resume(struct clock_event_device *evt)
{
struct hpet_channel *hc = clockevent_to_channel(evt);
struct irq_data *data = irq_get_irq_data(hc->irq);
@@ -509,13 +473,7 @@ static int hpet_msi_resume(struct clock_
return 0;
}
-static int hpet_msi_next_event(unsigned long delta,
- struct clock_event_device *evt)
-{
- return hpet_next_event(delta, clockevent_to_channel(evt)->num);
-}
-
-static irqreturn_t hpet_interrupt_handler(int irq, void *data)
+static irqreturn_t hpet_msi_interrupt_handler(int irq, void *data)
{
struct hpet_channel *hc = data;
struct clock_event_device *evt = &hc->evt;
@@ -529,9 +487,9 @@ static irqreturn_t hpet_interrupt_handle
return IRQ_HANDLED;
}
-static int hpet_setup_irq(struct hpet_channel *hc)
+static int hpet_setup_msi_irq(struct hpet_channel *hc)
{
- if (request_irq(hc->irq, hpet_interrupt_handler,
+ if (request_irq(hc->irq, hpet_msi_interrupt_handler,
IRQF_TIMER | IRQF_NOBALANCING,
hc->name, hc))
return -1;
@@ -553,20 +511,20 @@ static void init_one_hpet_msi_clockevent
hc->cpu = cpu;
per_cpu(cpu_hpet_channel, cpu) = hc;
evt->name = hc->name;
- hpet_setup_irq(hc);
+ hpet_setup_msi_irq(hc);
evt->irq = hc->irq;
evt->rating = 110;
evt->features = CLOCK_EVT_FEAT_ONESHOT;
if (hc->boot_cfg & HPET_TN_PERIODIC) {
evt->features |= CLOCK_EVT_FEAT_PERIODIC;
- evt->set_state_periodic = hpet_msi_set_periodic;
+ evt->set_state_periodic = hpet_clkevt_set_periodic;
}
- evt->set_state_shutdown = hpet_msi_shutdown;
- evt->set_state_oneshot = hpet_msi_set_oneshot;
- evt->tick_resume = hpet_msi_resume;
- evt->set_next_event = hpet_msi_next_event;
+ evt->set_state_shutdown = hpet_clkevt_shutdown;
+ evt->set_state_oneshot = hpet_clkevt_set_oneshot;
+ evt->set_next_event = hpet_clkevt_set_next_event;
+ evt->tick_resume = hpet_clkevt_msi_resume;
evt->cpumask = cpumask_of(hc->cpu);
clockevents_config_and_register(evt, hpet_freq, HPET_MIN_PROG_DELTA,
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