Commit b9805634 authored by Jiang Liu's avatar Jiang Liu Committed by Sasha Levin

genirq: Introduce struct irq_common_data to host shared irq data

[ Upstream commit 0d0b4c86 ]

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.comSigned-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarSasha Levin <alexander.levin@verizon.com>
parent 073bc325
......@@ -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)
......
......@@ -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;
......
......@@ -170,27 +170,27 @@ 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)
......
......@@ -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;
......
......@@ -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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