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Date: Tue, 21 May 2019 17:24:04 +0800
From: Guo Ren <guoren@...nel.org>
To: Marc Zyngier <marc.zyngier@....com>
Cc: robh+dt@...nel.org, mark.rutland@....com,
linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
jason@...edaemon.net, tglx@...utronix.de,
Ren Guo <ren_guo@...ky.com>
Subject: Re: [PATCH V3 2/2] irqchip/irq-csky-mpintc: Add triger type and
priority
Thx Marc,
On Tue, May 21, 2019 at 09:54:18AM +0100, Marc Zyngier wrote:
> On 21/05/2019 08:22, Guo Ren wrote:
> > Hi Marc,
> > ping ... Any problem ?
>
> Pinging me twice in four days for a patch posted in the middle of the
> merge window is a problem, yes. In general, do not post such patches
> during the merge window, unless this is an urgent fix. Everybody is busy
> unbreaking the tree.
Ok, got it and I will avoid this situation next time.
>
> >
> > Thx
> > Guo Ren
> >
> > <guoren@...nel.org> 于2019年5月13日周一 下午5:55写道：
> >>
> >> From: Guo Ren <ren_guo@...ky.com>
> >>
> >> Support 4 triger types:
> >> - IRQ_TYPE_LEVEL_HIGH
> >> - IRQ_TYPE_LEVEL_LOW
> >> - IRQ_TYPE_EDGE_RISING
> >> - IRQ_TYPE_EDGE_FALLING
> >>
> >> Support 0-255 priority setting for each irq.
> >>
> >> All of above could be set in DeviceTree file and it still compatible
> >> with the old DeviceTree format.
> >>
> >> Changes for V3:
> >> - Use IRQ_TYPE_LEVEL_HIGH as default instead of IRQ_TYPE_NONE
> >> - Remove unnecessary loop in csky_mpintc_handler
> >>
> >> Changes for V2:
> >> - Fixup this_cpu_read() preempted problem.
> >> - Optimize the coding style.
> >>
> >> Signed-off-by: Guo Ren <ren_guo@...ky.com>
> >> Cc: Marc Zyngier <marc.zyngier@....com>
> >> ---
> >> drivers/irqchip/irq-csky-mpintc.c | 113 +++++++++++++++++++++++++++++++++++---
> >> 1 file changed, 106 insertions(+), 7 deletions(-)
> >>
> >> diff --git a/drivers/irqchip/irq-csky-mpintc.c b/drivers/irqchip/irq-csky-mpintc.c
> >> index c67c961..5bc0868 100644
> >> --- a/drivers/irqchip/irq-csky-mpintc.c
> >> +++ b/drivers/irqchip/irq-csky-mpintc.c
> >> @@ -17,6 +17,7 @@
> >> #include <asm/reg_ops.h>
> >>
> >> static struct irq_domain *root_domain;
> >> +
> >> static void __iomem *INTCG_base;
> >> static void __iomem *INTCL_base;
> >>
> >> @@ -29,11 +30,13 @@ static void __iomem *INTCL_base;
> >>
> >> #define INTCG_ICTLR 0x0
> >> #define INTCG_CICFGR 0x100
> >> +#define INTCG_CIPRTR 0x200
> >> #define INTCG_CIDSTR 0x1000
> >>
> >> #define INTCL_PICTLR 0x0
> >> +#define INTCL_CFGR 0x14
> >> +#define INTCL_PRTR 0x20
> >> #define INTCL_SIGR 0x60
> >> -#define INTCL_HPPIR 0x68
> >> #define INTCL_RDYIR 0x6c
> >> #define INTCL_SENR 0xa0
> >> #define INTCL_CENR 0xa4
> >> @@ -41,21 +44,66 @@ static void __iomem *INTCL_base;
> >>
> >> static DEFINE_PER_CPU(void __iomem *, intcl_reg);
> >>
> >> +static unsigned long *__trigger;
> >> +static unsigned long *__priority;
> >> +
> >> +#define IRQ_OFFSET(irq) ((irq < COMM_IRQ_BASE) ? irq : (irq - COMM_IRQ_BASE))
> >> +
> >> +#define TRIG_BYTE_OFFSET(i) ((((i) * 2) / 32) * 4)
> >> +#define TRIG_BIT_OFFSET(i) (((i) * 2) % 32)
> >> +
> >> +#define PRI_BYTE_OFFSET(i) ((((i) * 8) / 32) * 4)
> >> +#define PRI_BIT_OFFSET(i) (((i) * 8) % 32)
> >> +
> >> +#define TRIG_VAL(trigger, irq) (trigger << TRIG_BIT_OFFSET(IRQ_OFFSET(irq)))
> >> +#define TRIG_VAL_MSK(irq) (~(3 << TRIG_BIT_OFFSET(IRQ_OFFSET(irq))))
> >> +#define PRI_VAL(priority, irq) (priority << PRI_BIT_OFFSET(IRQ_OFFSET(irq)))
> >> +#define PRI_VAL_MSK(irq) (~(0xff << PRI_BIT_OFFSET(IRQ_OFFSET(irq))))
> >> +
> >> +#define TRIG_BASE(irq) \
> >> + (TRIG_BYTE_OFFSET(IRQ_OFFSET(irq)) + ((irq < COMM_IRQ_BASE) ? \
> >> + (this_cpu_read(intcl_reg) + INTCL_CFGR) : (INTCG_base + INTCG_CICFGR)))
> >> +
> >> +#define PRI_BASE(irq) \
> >> + (PRI_BYTE_OFFSET(IRQ_OFFSET(irq)) + ((irq < COMM_IRQ_BASE) ? \
> >> + (this_cpu_read(intcl_reg) + INTCL_PRTR) : (INTCG_base + INTCG_CIPRTR)))
> >> +
> >> +static DEFINE_SPINLOCK(setup_lock);
> >> +static void setup_trigger_priority(unsigned long irq, unsigned long trigger,
> >> + unsigned long priority)
> >> +{
> >> + unsigned int tmp;
> >> +
> >> + spin_lock(&setup_lock);
> >> +
> >> + /* setup trigger */
> >> + tmp = readl_relaxed(TRIG_BASE(irq)) & TRIG_VAL_MSK(irq);
> >> +
> >> + writel_relaxed(tmp | TRIG_VAL(trigger, irq), TRIG_BASE(irq));
> >> +
> >> + /* setup priority */
> >> + tmp = readl_relaxed(PRI_BASE(irq)) & PRI_VAL_MSK(irq);
> >> +
> >> + writel_relaxed(tmp | PRI_VAL(priority, irq), PRI_BASE(irq));
> >> +
> >> + spin_unlock(&setup_lock);
> >> +}
> >> +
> >> static void csky_mpintc_handler(struct pt_regs *regs)
> >> {
> >> void __iomem *reg_base = this_cpu_read(intcl_reg);
> >>
> >> - do {
> >> - handle_domain_irq(root_domain,
> >> - readl_relaxed(reg_base + INTCL_RDYIR),
> >> - regs);
> >> - } while (readl_relaxed(reg_base + INTCL_HPPIR) & BIT(31));
> >> + handle_domain_irq(root_domain,
> >> + readl_relaxed(reg_base + INTCL_RDYIR), regs);
>
> This seems to be an unrelated change.
Yes, I need seperate it to another patch.
>
> >> }
> >>
> >> static void csky_mpintc_enable(struct irq_data *d)
> >> {
> >> void __iomem *reg_base = this_cpu_read(intcl_reg);
> >>
> >> + setup_trigger_priority(d->hwirq, __trigger[d->hwirq],
> >> + __priority[d->hwirq]);
> >> +
> >> writel_relaxed(d->hwirq, reg_base + INTCL_SENR);
> >> }
> >>
> >> @@ -73,6 +121,28 @@ static void csky_mpintc_eoi(struct irq_data *d)
> >> writel_relaxed(d->hwirq, reg_base + INTCL_CACR);
> >> }
> >>
> >> +static int csky_mpintc_set_type(struct irq_data *d, unsigned int type)
> >> +{
> >> + switch (type & IRQ_TYPE_SENSE_MASK) {
> >> + case IRQ_TYPE_LEVEL_HIGH:
> >> + __trigger[d->hwirq] = 0;
> >> + break;
> >> + case IRQ_TYPE_LEVEL_LOW:
> >> + __trigger[d->hwirq] = 1;
> >> + break;
> >> + case IRQ_TYPE_EDGE_RISING:
> >> + __trigger[d->hwirq] = 2;
> >> + break;
> >> + case IRQ_TYPE_EDGE_FALLING:
> >> + __trigger[d->hwirq] = 3;
> >> + break;
> >> + default:
> >> + return -EINVAL;
> >> + }
> >> +
> >> + return 0;
> >> +}
> >> +
> >> #ifdef CONFIG_SMP
> >> static int csky_irq_set_affinity(struct irq_data *d,
> >> const struct cpumask *mask_val,
> >> @@ -105,6 +175,7 @@ static struct irq_chip csky_irq_chip = {
> >> .irq_eoi = csky_mpintc_eoi,
> >> .irq_enable = csky_mpintc_enable,
> >> .irq_disable = csky_mpintc_disable,
> >> + .irq_set_type = csky_mpintc_set_type,
> >> #ifdef CONFIG_SMP
> >> .irq_set_affinity = csky_irq_set_affinity,
> >> #endif
> >> @@ -125,9 +196,29 @@ static int csky_irqdomain_map(struct irq_domain *d, unsigned int irq,
> >> return 0;
> >> }
> >>
> >> +static int csky_irq_domain_xlate_cells(struct irq_domain *d,
> >> + struct device_node *ctrlr, const u32 *intspec,
> >> + unsigned int intsize, unsigned long *out_hwirq,
> >> + unsigned int *out_type)
> >> +{
> >> + if (WARN_ON(intsize < 1))
> >> + return -EINVAL;
> >> +
> >> + *out_hwirq = intspec[0];
> >> + if (intsize > 1)
> >> + *out_type = intspec[1] & IRQ_TYPE_SENSE_MASK;
> >> + else
> >> + *out_type = IRQ_TYPE_LEVEL_HIGH;
> >> +
> >> + if (intsize > 2)
> >> + __priority[*out_hwirq] = intspec[2];
>
> You keep doing this, and I keep objecting to it. Linux doesn't support
> interrupt priorities, and yet you keep bringing them back. Why don't you
> simply ignore that field and stick all priorities to some arbitrary value?
Em... Ok, I'll remove priorities.
Best Regards
Guo Ren
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