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author | Paul Burton <paul.burton@mips.com> | 2017-10-31 09:41:44 -0700 |
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committer | Marc Zyngier <marc.zyngier@arm.com> | 2017-11-02 15:55:45 +0000 |
commit | 63b746b19fa660737df603f97fd5f435c511d1b5 (patch) | |
tree | bb71a03c556da8bd455be1bd63d6374de0f98ac6 /drivers/irqchip | |
parent | 4e4cb1b183d6e9df57f4e54c8b1a5231995da820 (diff) | |
download | linux-63b746b19fa660737df603f97fd5f435c511d1b5.tar.gz linux-63b746b19fa660737df603f97fd5f435c511d1b5.tar.bz2 linux-63b746b19fa660737df603f97fd5f435c511d1b5.zip |
irqchip: mips-gic: Inline gic_local_irq_domain_map()
The gic_local_irq_domain_map() function has only one callsite in
gic_irq_domain_map(), and the split between the two functions makes it
unclear that they duplicate calculations & checks.
Inline gic_local_irq_domain_map() into gic_irq_domain_map() in order to
clean this up. Doing this makes the following small issues obvious, and
the patch tidies them up:
- Both functions used GIC_HWIRQ_TO_LOCAL() to convert a hwirq number to
a local IRQ number. We now only do this once. Although the compiler
ought to have optimised this away before anyway, the change leaves us
with less duplicate code.
- gic_local_irq_domain_map() had a check for invalid local interrupt
numbers (intr > GIC_LOCAL_INT_FDC). This condition can never occur
because any hwirq higher than those used for local interrupts is a
shared interrupt, which gic_irq_domain_map() already handles
separately. We therefore remove this check.
- The decision of whether to map the interrupt to gic_cpu_pin or
timer_cpu_pin can be handled within the existing switch statement in
gic_irq_domain_map(), shortening the code a little.
The change additionally prepares us nicely for the following patch of
the series which would otherwise need to duplicate the check for whether
a local interrupt should be percpu_devid or just percpu (ie. the switch
statement from gic_irq_domain_map()) in gic_local_irq_domain_map().
Signed-off-by: Paul Burton <paul.burton@mips.com>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-mips@linux-mips.org
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'drivers/irqchip')
-rw-r--r-- | drivers/irqchip/irq-mips-gic.c | 58 |
1 files changed, 22 insertions, 36 deletions
diff --git a/drivers/irqchip/irq-mips-gic.c b/drivers/irqchip/irq-mips-gic.c index c90976d7e53c..6fdcc1552fab 100644 --- a/drivers/irqchip/irq-mips-gic.c +++ b/drivers/irqchip/irq-mips-gic.c @@ -382,39 +382,6 @@ static void gic_irq_dispatch(struct irq_desc *desc) gic_handle_shared_int(true); } -static int gic_local_irq_domain_map(struct irq_domain *d, unsigned int virq, - irq_hw_number_t hw) -{ - int intr = GIC_HWIRQ_TO_LOCAL(hw); - int i; - unsigned long flags; - u32 val; - - if (!gic_local_irq_is_routable(intr)) - return -EPERM; - - if (intr > GIC_LOCAL_INT_FDC) { - pr_err("Invalid local IRQ %d\n", intr); - return -EINVAL; - } - - if (intr == GIC_LOCAL_INT_TIMER) { - /* CONFIG_MIPS_CMP workaround (see __gic_init) */ - val = GIC_MAP_PIN_MAP_TO_PIN | timer_cpu_pin; - } else { - val = GIC_MAP_PIN_MAP_TO_PIN | gic_cpu_pin; - } - - spin_lock_irqsave(&gic_lock, flags); - for (i = 0; i < gic_vpes; i++) { - write_gic_vl_other(mips_cm_vp_id(i)); - write_gic_vo_map(intr, val); - } - spin_unlock_irqrestore(&gic_lock, flags); - - return 0; -} - static int gic_shared_irq_domain_map(struct irq_domain *d, unsigned int virq, irq_hw_number_t hw, unsigned int cpu) { @@ -457,7 +424,10 @@ static int gic_irq_domain_xlate(struct irq_domain *d, struct device_node *ctrlr, static int gic_irq_domain_map(struct irq_domain *d, unsigned int virq, irq_hw_number_t hwirq) { - int err; + unsigned long flags; + unsigned int intr; + int err, i; + u32 map; if (hwirq >= GIC_SHARED_HWIRQ_BASE) { /* verify that shared irqs don't conflict with an IPI irq */ @@ -474,8 +444,14 @@ static int gic_irq_domain_map(struct irq_domain *d, unsigned int virq, return gic_shared_irq_domain_map(d, virq, hwirq, 0); } - switch (GIC_HWIRQ_TO_LOCAL(hwirq)) { + intr = GIC_HWIRQ_TO_LOCAL(hwirq); + map = GIC_MAP_PIN_MAP_TO_PIN | gic_cpu_pin; + + switch (intr) { case GIC_LOCAL_INT_TIMER: + /* CONFIG_MIPS_CMP workaround (see __gic_init) */ + map = GIC_MAP_PIN_MAP_TO_PIN | timer_cpu_pin; + /* fall-through */ case GIC_LOCAL_INT_PERFCTR: case GIC_LOCAL_INT_FDC: /* @@ -504,7 +480,17 @@ static int gic_irq_domain_map(struct irq_domain *d, unsigned int virq, break; } - return gic_local_irq_domain_map(d, virq, hwirq); + if (!gic_local_irq_is_routable(intr)) + return -EPERM; + + spin_lock_irqsave(&gic_lock, flags); + for (i = 0; i < gic_vpes; i++) { + write_gic_vl_other(mips_cm_vp_id(i)); + write_gic_vo_map(intr, map); + } + spin_unlock_irqrestore(&gic_lock, flags); + + return 0; } static int gic_irq_domain_alloc(struct irq_domain *d, unsigned int virq, |