Commit-ID: 966dc736b819999cd2d3a6408d47d33b579f7d56 Gitweb: http://git.kernel.org/tip/966dc736b819999cd2d3a6408d47d33b579f7d56 Author: Thomas Gleixner <tglx@xxxxxxxxxxxxx> AuthorDate: Mon, 6 May 2013 14:30:22 +0000 Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx> CommitDate: Wed, 29 May 2013 10:57:10 +0200 genirq: Generic chip: Cache per irq bit mask Cache the per irq bit mask instead of recalculating it over and over. Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Cc: Thomas Petazzoni <thomas.petazzoni@xxxxxxxxxxxxxxxxxx> Cc: Andrew Lunn <andrew@xxxxxxx> Cc: Russell King - ARM Linux <linux@xxxxxxxxxxxxxxxx> Cc: Jason Cooper <jason@xxxxxxxxxxxxxx> Cc: Arnd Bergmann <arnd@xxxxxxxx> Cc: Jean-Francois Moine <moinejf@xxxxxxx> Cc: devicetree-discuss@xxxxxxxxxxxxxxxx Cc: Rob Herring <rob.herring@xxxxxxxxxxx> Cc: Jason Gunthorpe <jgunthorpe@xxxxxxxxxxxxxxxxxxxx> Cc: Gregory Clement <gregory.clement@xxxxxxxxxxxxxxxxxx> Cc: Gerlando Falauto <gerlando.falauto@xxxxxxxxxxx> Cc: Rob Landley <rob@xxxxxxxxxxx> Acked-by: Grant Likely <grant.likely@xxxxxxxxxx> Cc: Maxime Ripard <maxime.ripard@xxxxxxxxxxxxxxxxxx> Cc: Ezequiel Garcia <ezequiel.garcia@xxxxxxxxxxxxxxxxxx> Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx Cc: Sebastian Hesselbarth <sebastian.hesselbarth@xxxxxxxxx> Link: http://lkml.kernel.org/r/20130506142539.227119865@xxxxxxxxxxxxx Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx> --- include/linux/irq.h | 4 ++++ kernel/irq/generic-chip.c | 23 ++++++++++++++--------- 2 files changed, 18 insertions(+), 9 deletions(-) diff --git a/include/linux/irq.h b/include/linux/irq.h index 7f1f015..d5fc7f5 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -119,6 +119,7 @@ struct irq_domain; /** * struct irq_data - per irq and irq chip data passed down to chip functions + * @mask: precomputed bitmask for accessing the chip registers * @irq: interrupt number * @hwirq: hardware interrupt number, local to the interrupt domain * @node: node index useful for balancing @@ -138,6 +139,7 @@ struct irq_domain; * irq_data. */ struct irq_data { + u32 mask; unsigned int irq; unsigned long hwirq; unsigned int node; @@ -705,11 +707,13 @@ struct irq_chip_generic { * irq chips which need to call irq_set_wake() on * the parent irq. Usually GPIO implementations * @IRQ_GC_MASK_CACHE_PER_TYPE: Mask cache is chip type private + * @IRQ_GC_NO_MASK: Do not calculate irq_data->mask */ enum irq_gc_flags { IRQ_GC_INIT_MASK_CACHE = 1 << 0, IRQ_GC_INIT_NESTED_LOCK = 1 << 1, IRQ_GC_MASK_CACHE_PER_TYPE = 1 << 2, + IRQ_GC_NO_MASK = 1 << 3, }; /* Generic chip callback functions */ diff --git a/kernel/irq/generic-chip.c b/kernel/irq/generic-chip.c index da2a941..957155c 100644 --- a/kernel/irq/generic-chip.c +++ b/kernel/irq/generic-chip.c @@ -35,7 +35,7 @@ void irq_gc_mask_disable_reg(struct irq_data *d) { struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d); struct irq_chip_type *ct = irq_data_get_chip_type(d); - u32 mask = 1 << (d->irq - gc->irq_base); + u32 mask = d->mask; irq_gc_lock(gc); irq_reg_writel(mask, gc->reg_base + ct->regs.disable); @@ -54,7 +54,7 @@ void irq_gc_mask_set_bit(struct irq_data *d) { struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d); struct irq_chip_type *ct = irq_data_get_chip_type(d); - u32 mask = 1 << (d->irq - gc->irq_base); + u32 mask = d->mask; irq_gc_lock(gc); *ct->mask_cache |= mask; @@ -73,7 +73,7 @@ void irq_gc_mask_clr_bit(struct irq_data *d) { struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d); struct irq_chip_type *ct = irq_data_get_chip_type(d); - u32 mask = 1 << (d->irq - gc->irq_base); + u32 mask = d->mask; irq_gc_lock(gc); *ct->mask_cache &= ~mask; @@ -92,7 +92,7 @@ void irq_gc_unmask_enable_reg(struct irq_data *d) { struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d); struct irq_chip_type *ct = irq_data_get_chip_type(d); - u32 mask = 1 << (d->irq - gc->irq_base); + u32 mask = d->mask; irq_gc_lock(gc); irq_reg_writel(mask, gc->reg_base + ct->regs.enable); @@ -108,7 +108,7 @@ void irq_gc_ack_set_bit(struct irq_data *d) { struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d); struct irq_chip_type *ct = irq_data_get_chip_type(d); - u32 mask = 1 << (d->irq - gc->irq_base); + u32 mask = d->mask; irq_gc_lock(gc); irq_reg_writel(mask, gc->reg_base + ct->regs.ack); @@ -123,7 +123,7 @@ void irq_gc_ack_clr_bit(struct irq_data *d) { struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d); struct irq_chip_type *ct = irq_data_get_chip_type(d); - u32 mask = ~(1 << (d->irq - gc->irq_base)); + u32 mask = ~d->mask; irq_gc_lock(gc); irq_reg_writel(mask, gc->reg_base + ct->regs.ack); @@ -138,7 +138,7 @@ void irq_gc_mask_disable_reg_and_ack(struct irq_data *d) { struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d); struct irq_chip_type *ct = irq_data_get_chip_type(d); - u32 mask = 1 << (d->irq - gc->irq_base); + u32 mask = d->mask; irq_gc_lock(gc); irq_reg_writel(mask, gc->reg_base + ct->regs.mask); @@ -154,7 +154,7 @@ void irq_gc_eoi(struct irq_data *d) { struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d); struct irq_chip_type *ct = irq_data_get_chip_type(d); - u32 mask = 1 << (d->irq - gc->irq_base); + u32 mask = d->mask; irq_gc_lock(gc); irq_reg_writel(mask, gc->reg_base + ct->regs.eoi); @@ -172,7 +172,7 @@ void irq_gc_eoi(struct irq_data *d) int irq_gc_set_wake(struct irq_data *d, unsigned int on) { struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d); - u32 mask = 1 << (d->irq - gc->irq_base); + u32 mask = d->mask; if (!(mask & gc->wake_enabled)) return -EINVAL; @@ -264,6 +264,11 @@ void irq_setup_generic_chip(struct irq_chip_generic *gc, u32 msk, if (flags & IRQ_GC_INIT_NESTED_LOCK) irq_set_lockdep_class(i, &irq_nested_lock_class); + if (!(flags & IRQ_GC_NO_MASK)) { + struct irq_data *d = irq_get_irq_data(i); + + d->mask = 1 << (i - gc->irq_base); + } irq_set_chip_and_handler(i, &ct->chip, ct->handler); irq_set_chip_data(i, gc); irq_modify_status(i, clr, set); -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html