Commit 0d0b4c86 authored by Jiang Liu's avatar Jiang Liu Committed by Thomas Gleixner
Browse files

genirq: Introduce struct irq_common_data to host shared irq data 



With the introduction of hierarchy irqdomain, struct irq_data becomes
per-chip instead of per-irq and there may be multiple irq_datas
associated with the same irq. Some per-irq data stored in struct
irq_data now may get duplicated into multiple irq_datas, and causes
inconsistent view.

So introduce struct irq_common_data to host per-irq common data and to
achieve consistent view among irq_chips.

Signed-off-by: default avatarJiang Liu <jiang.liu@linux.intel.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Kevin Cernekee <cernekee@gmail.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Link: http://lkml.kernel.org/r/1433145945-789-4-git-send-email-jiang.liu@linux.intel.com


Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent 77ed42f1

include/linux/irq.h

+32 −22
Original line number Diff line number Diff line
@@ -126,13 +126,21 @@ struct msi_desc; 
struct irq_domain;



/**

 * struct irq_data - per irq and irq chip data passed down to chip functions

 * struct irq_common_data - per irq data shared by all irqchips

 * @state_use_accessors: status information for irq chip functions.

 *			Use accessor functions to deal with it

 */

struct irq_common_data {

	unsigned int		state_use_accessors;

};



/**

 * struct irq_data - per 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

 * @state_use_accessors: status information for irq chip functions.

 *			Use accessor functions to deal with it

 * @common:		point to data shared by all irqchips

 * @chip:		low level interrupt hardware access

 * @domain:		Interrupt translation domain; responsible for mapping

 *			between hwirq number and linux irq number.
@@ -153,7 +161,7 @@ struct irq_data { 
	unsigned int		irq;

	unsigned long		hwirq;

	unsigned int		node;

	unsigned int		state_use_accessors;

	struct irq_common_data	*common;

	struct irq_chip		*chip;

	struct irq_domain	*domain;

#ifdef	CONFIG_IRQ_DOMAIN_HIERARCHY
@@ -166,7 +174,7 @@ struct irq_data { 
};



/*

 * Bit masks for irq_data.state

 * Bit masks for irq_common_data.state_use_accessors

 *

 * IRQD_TRIGGER_MASK		- Mask for the trigger type bits

 * IRQD_SETAFFINITY_PENDING	- Affinity setting is pending
@@ -198,34 +206,36 @@ enum { 
	IRQD_WAKEUP_ARMED		= (1 << 19),

};



#define __irqd_to_state(d)		((d)->common->state_use_accessors)



static inline bool irqd_is_setaffinity_pending(struct irq_data *d)

{

	return d->state_use_accessors & IRQD_SETAFFINITY_PENDING;

	return __irqd_to_state(d) & IRQD_SETAFFINITY_PENDING;

}



static inline bool irqd_is_per_cpu(struct irq_data *d)

{

	return d->state_use_accessors & IRQD_PER_CPU;

	return __irqd_to_state(d) & IRQD_PER_CPU;

}



static inline bool irqd_can_balance(struct irq_data *d)

{

	return !(d->state_use_accessors & (IRQD_PER_CPU | IRQD_NO_BALANCING));

	return !(__irqd_to_state(d) & (IRQD_PER_CPU | IRQD_NO_BALANCING));

}



static inline bool irqd_affinity_was_set(struct irq_data *d)

{

	return d->state_use_accessors & IRQD_AFFINITY_SET;

	return __irqd_to_state(d) & IRQD_AFFINITY_SET;

}



static inline void irqd_mark_affinity_was_set(struct irq_data *d)

{

	d->state_use_accessors |= IRQD_AFFINITY_SET;

	__irqd_to_state(d) |= IRQD_AFFINITY_SET;

}



static inline u32 irqd_get_trigger_type(struct irq_data *d)

{

	return d->state_use_accessors & IRQD_TRIGGER_MASK;

	return __irqd_to_state(d) & IRQD_TRIGGER_MASK;

}



/*
@@ -233,43 +243,43 @@ static inline u32 irqd_get_trigger_type(struct irq_data *d) 
 */

static inline void irqd_set_trigger_type(struct irq_data *d, u32 type)

{

	d->state_use_accessors &= ~IRQD_TRIGGER_MASK;

	d->state_use_accessors |= type & IRQD_TRIGGER_MASK;

	__irqd_to_state(d) &= ~IRQD_TRIGGER_MASK;

	__irqd_to_state(d) |= type & IRQD_TRIGGER_MASK;

}



static inline bool irqd_is_level_type(struct irq_data *d)

{

	return d->state_use_accessors & IRQD_LEVEL;

	return __irqd_to_state(d) & IRQD_LEVEL;

}



static inline bool irqd_is_wakeup_set(struct irq_data *d)

{

	return d->state_use_accessors & IRQD_WAKEUP_STATE;

	return __irqd_to_state(d) & IRQD_WAKEUP_STATE;

}



static inline bool irqd_can_move_in_process_context(struct irq_data *d)

{

	return d->state_use_accessors & IRQD_MOVE_PCNTXT;

	return __irqd_to_state(d) & IRQD_MOVE_PCNTXT;

}



static inline bool irqd_irq_disabled(struct irq_data *d)

{

	return d->state_use_accessors & IRQD_IRQ_DISABLED;

	return __irqd_to_state(d) & IRQD_IRQ_DISABLED;

}



static inline bool irqd_irq_masked(struct irq_data *d)

{

	return d->state_use_accessors & IRQD_IRQ_MASKED;

	return __irqd_to_state(d) & IRQD_IRQ_MASKED;

}



static inline bool irqd_irq_inprogress(struct irq_data *d)

{

	return d->state_use_accessors & IRQD_IRQ_INPROGRESS;

	return __irqd_to_state(d) & IRQD_IRQ_INPROGRESS;

}



static inline bool irqd_is_wakeup_armed(struct irq_data *d)

{

	return d->state_use_accessors & IRQD_WAKEUP_ARMED;

	return __irqd_to_state(d) & IRQD_WAKEUP_ARMED;

}
@@ -280,12 +290,12 @@ static inline bool irqd_is_wakeup_armed(struct irq_data *d) 
 */

static inline void irqd_set_chained_irq_inprogress(struct irq_data *d)

{

	d->state_use_accessors |= IRQD_IRQ_INPROGRESS;

	__irqd_to_state(d) |= IRQD_IRQ_INPROGRESS;

}



static inline void irqd_clr_chained_irq_inprogress(struct irq_data *d)

{

	d->state_use_accessors &= ~IRQD_IRQ_INPROGRESS;

	__irqd_to_state(d) &= ~IRQD_IRQ_INPROGRESS;

}



static inline irq_hw_number_t irqd_to_hwirq(struct irq_data *d)

include/linux/irqdesc.h

+2 −1
Original line number Diff line number Diff line
@@ -17,7 +17,7 @@ struct pt_regs; 


/**

 * struct irq_desc - interrupt descriptor

 * @irq_data:		per irq and chip data passed down to chip functions

 * @irq_common_data:	per irq and chip data passed down to chip functions

 * @kstat_irqs:		irq stats per cpu

 * @handle_irq:		highlevel irq-events handler

 * @preflow_handler:	handler called before the flow handler (currently used by sparc)
@@ -47,6 +47,7 @@ struct pt_regs; 
 * @name:		flow handler name for /proc/interrupts output

 */

struct irq_desc {

	struct irq_common_data	irq_common_data;

	struct irq_data		irq_data;

	unsigned int __percpu	*kstat_irqs;

	irq_flow_handler_t	handle_irq;

kernel/irq/internals.h

+5 −5
Original line number Diff line number Diff line
@@ -168,27 +168,27 @@ irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags) 
 */

static inline void irqd_set_move_pending(struct irq_data *d)

{

	d->state_use_accessors |= IRQD_SETAFFINITY_PENDING;

	__irqd_to_state(d) |= IRQD_SETAFFINITY_PENDING;

}



static inline void irqd_clr_move_pending(struct irq_data *d)

{

	d->state_use_accessors &= ~IRQD_SETAFFINITY_PENDING;

	__irqd_to_state(d) &= ~IRQD_SETAFFINITY_PENDING;

}



static inline void irqd_clear(struct irq_data *d, unsigned int mask)

{

	d->state_use_accessors &= ~mask;

	__irqd_to_state(d) &= ~mask;

}



static inline void irqd_set(struct irq_data *d, unsigned int mask)

{

	d->state_use_accessors |= mask;

	__irqd_to_state(d) |= mask;

}



static inline bool irqd_has_set(struct irq_data *d, unsigned int mask)

{

	return d->state_use_accessors & mask;

	return __irqd_to_state(d) & mask;

}



static inline void kstat_incr_irqs_this_cpu(unsigned int irq, struct irq_desc *desc)

kernel/irq/irqdesc.c

+1 −0
Original line number Diff line number Diff line
@@ -76,6 +76,7 @@ static void desc_set_defaults(unsigned int irq, struct irq_desc *desc, int node, 
{

	int cpu;



	desc->irq_data.common = &desc->irq_common_data;

	desc->irq_data.irq = irq;

	desc->irq_data.chip = &no_irq_chip;

	desc->irq_data.chip_data = NULL;

kernel/irq/irqdomain.c

+1 −0
Original line number Diff line number Diff line
@@ -834,6 +834,7 @@ static struct irq_data *irq_domain_insert_irq_data(struct irq_domain *domain, 
	if (irq_data) {

		child->parent_data = irq_data;

		irq_data->irq = child->irq;

		irq_data->common = child->common;

		irq_data->node = child->node;

		irq_data->domain = domain;

	}

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