forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
514 lines
14 KiB
514 lines
14 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
|
/* |
|
* IRQ subsystem internal functions and variables: |
|
* |
|
* Do not ever include this file from anything else than |
|
* kernel/irq/. Do not even think about using any information outside |
|
* of this file for your non core code. |
|
*/ |
|
#include <linux/irqdesc.h> |
|
#include <linux/kernel_stat.h> |
|
#include <linux/pm_runtime.h> |
|
#include <linux/sched/clock.h> |
|
|
|
#ifdef CONFIG_SPARSE_IRQ |
|
# define IRQ_BITMAP_BITS (NR_IRQS + 8196) |
|
#else |
|
# define IRQ_BITMAP_BITS NR_IRQS |
|
#endif |
|
|
|
#define istate core_internal_state__do_not_mess_with_it |
|
|
|
extern bool noirqdebug; |
|
|
|
extern struct irqaction chained_action; |
|
|
|
/* |
|
* Bits used by threaded handlers: |
|
* IRQTF_RUNTHREAD - signals that the interrupt handler thread should run |
|
* IRQTF_WARNED - warning "IRQ_WAKE_THREAD w/o thread_fn" has been printed |
|
* IRQTF_AFFINITY - irq thread is requested to adjust affinity |
|
* IRQTF_FORCED_THREAD - irq action is force threaded |
|
* IRQTF_READY - signals that irq thread is ready |
|
*/ |
|
enum { |
|
IRQTF_RUNTHREAD, |
|
IRQTF_WARNED, |
|
IRQTF_AFFINITY, |
|
IRQTF_FORCED_THREAD, |
|
IRQTF_READY, |
|
}; |
|
|
|
/* |
|
* Bit masks for desc->core_internal_state__do_not_mess_with_it |
|
* |
|
* IRQS_AUTODETECT - autodetection in progress |
|
* IRQS_SPURIOUS_DISABLED - was disabled due to spurious interrupt |
|
* detection |
|
* IRQS_POLL_INPROGRESS - polling in progress |
|
* IRQS_ONESHOT - irq is not unmasked in primary handler |
|
* IRQS_REPLAY - irq is replayed |
|
* IRQS_WAITING - irq is waiting |
|
* IRQS_PENDING - irq is pending and replayed later |
|
* IRQS_SUSPENDED - irq is suspended |
|
* IRQS_NMI - irq line is used to deliver NMIs |
|
*/ |
|
enum { |
|
IRQS_AUTODETECT = 0x00000001, |
|
IRQS_SPURIOUS_DISABLED = 0x00000002, |
|
IRQS_POLL_INPROGRESS = 0x00000008, |
|
IRQS_ONESHOT = 0x00000020, |
|
IRQS_REPLAY = 0x00000040, |
|
IRQS_WAITING = 0x00000080, |
|
IRQS_PENDING = 0x00000200, |
|
IRQS_SUSPENDED = 0x00000800, |
|
IRQS_TIMINGS = 0x00001000, |
|
IRQS_NMI = 0x00002000, |
|
}; |
|
|
|
#include "debug.h" |
|
#include "settings.h" |
|
|
|
extern int __irq_set_trigger(struct irq_desc *desc, unsigned long flags); |
|
extern void __disable_irq(struct irq_desc *desc); |
|
extern void __enable_irq(struct irq_desc *desc); |
|
|
|
#define IRQ_RESEND true |
|
#define IRQ_NORESEND false |
|
|
|
#define IRQ_START_FORCE true |
|
#define IRQ_START_COND false |
|
|
|
extern int irq_activate(struct irq_desc *desc); |
|
extern int irq_activate_and_startup(struct irq_desc *desc, bool resend); |
|
extern int irq_startup(struct irq_desc *desc, bool resend, bool force); |
|
|
|
extern void irq_shutdown(struct irq_desc *desc); |
|
extern void irq_shutdown_and_deactivate(struct irq_desc *desc); |
|
extern void irq_enable(struct irq_desc *desc); |
|
extern void irq_disable(struct irq_desc *desc); |
|
extern void irq_percpu_enable(struct irq_desc *desc, unsigned int cpu); |
|
extern void irq_percpu_disable(struct irq_desc *desc, unsigned int cpu); |
|
extern void mask_irq(struct irq_desc *desc); |
|
extern void unmask_irq(struct irq_desc *desc); |
|
extern void unmask_threaded_irq(struct irq_desc *desc); |
|
|
|
#ifdef CONFIG_SPARSE_IRQ |
|
static inline void irq_mark_irq(unsigned int irq) { } |
|
#else |
|
extern void irq_mark_irq(unsigned int irq); |
|
#endif |
|
|
|
extern int __irq_get_irqchip_state(struct irq_data *data, |
|
enum irqchip_irq_state which, |
|
bool *state); |
|
|
|
extern void init_kstat_irqs(struct irq_desc *desc, int node, int nr); |
|
|
|
irqreturn_t __handle_irq_event_percpu(struct irq_desc *desc); |
|
irqreturn_t handle_irq_event_percpu(struct irq_desc *desc); |
|
irqreturn_t handle_irq_event(struct irq_desc *desc); |
|
|
|
/* Resending of interrupts :*/ |
|
int check_irq_resend(struct irq_desc *desc, bool inject); |
|
bool irq_wait_for_poll(struct irq_desc *desc); |
|
void __irq_wake_thread(struct irq_desc *desc, struct irqaction *action); |
|
|
|
#ifdef CONFIG_PROC_FS |
|
extern void register_irq_proc(unsigned int irq, struct irq_desc *desc); |
|
extern void unregister_irq_proc(unsigned int irq, struct irq_desc *desc); |
|
extern void register_handler_proc(unsigned int irq, struct irqaction *action); |
|
extern void unregister_handler_proc(unsigned int irq, struct irqaction *action); |
|
#else |
|
static inline void register_irq_proc(unsigned int irq, struct irq_desc *desc) { } |
|
static inline void unregister_irq_proc(unsigned int irq, struct irq_desc *desc) { } |
|
static inline void register_handler_proc(unsigned int irq, |
|
struct irqaction *action) { } |
|
static inline void unregister_handler_proc(unsigned int irq, |
|
struct irqaction *action) { } |
|
#endif |
|
|
|
extern bool irq_can_set_affinity_usr(unsigned int irq); |
|
|
|
extern void irq_set_thread_affinity(struct irq_desc *desc); |
|
|
|
extern int irq_do_set_affinity(struct irq_data *data, |
|
const struct cpumask *dest, bool force); |
|
|
|
#ifdef CONFIG_SMP |
|
extern int irq_setup_affinity(struct irq_desc *desc); |
|
#else |
|
static inline int irq_setup_affinity(struct irq_desc *desc) { return 0; } |
|
#endif |
|
|
|
/* Inline functions for support of irq chips on slow busses */ |
|
static inline void chip_bus_lock(struct irq_desc *desc) |
|
{ |
|
if (unlikely(desc->irq_data.chip->irq_bus_lock)) |
|
desc->irq_data.chip->irq_bus_lock(&desc->irq_data); |
|
} |
|
|
|
static inline void chip_bus_sync_unlock(struct irq_desc *desc) |
|
{ |
|
if (unlikely(desc->irq_data.chip->irq_bus_sync_unlock)) |
|
desc->irq_data.chip->irq_bus_sync_unlock(&desc->irq_data); |
|
} |
|
|
|
#define _IRQ_DESC_CHECK (1 << 0) |
|
#define _IRQ_DESC_PERCPU (1 << 1) |
|
|
|
#define IRQ_GET_DESC_CHECK_GLOBAL (_IRQ_DESC_CHECK) |
|
#define IRQ_GET_DESC_CHECK_PERCPU (_IRQ_DESC_CHECK | _IRQ_DESC_PERCPU) |
|
|
|
#define for_each_action_of_desc(desc, act) \ |
|
for (act = desc->action; act; act = act->next) |
|
|
|
struct irq_desc * |
|
__irq_get_desc_lock(unsigned int irq, unsigned long *flags, bool bus, |
|
unsigned int check); |
|
void __irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags, bool bus); |
|
|
|
static inline struct irq_desc * |
|
irq_get_desc_buslock(unsigned int irq, unsigned long *flags, unsigned int check) |
|
{ |
|
return __irq_get_desc_lock(irq, flags, true, check); |
|
} |
|
|
|
static inline void |
|
irq_put_desc_busunlock(struct irq_desc *desc, unsigned long flags) |
|
{ |
|
__irq_put_desc_unlock(desc, flags, true); |
|
} |
|
|
|
static inline struct irq_desc * |
|
irq_get_desc_lock(unsigned int irq, unsigned long *flags, unsigned int check) |
|
{ |
|
return __irq_get_desc_lock(irq, flags, false, check); |
|
} |
|
|
|
static inline void |
|
irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags) |
|
{ |
|
__irq_put_desc_unlock(desc, flags, false); |
|
} |
|
|
|
#define __irqd_to_state(d) ACCESS_PRIVATE((d)->common, state_use_accessors) |
|
|
|
static inline unsigned int irqd_get(struct irq_data *d) |
|
{ |
|
return __irqd_to_state(d); |
|
} |
|
|
|
/* |
|
* Manipulation functions for irq_data.state |
|
*/ |
|
static inline void irqd_set_move_pending(struct irq_data *d) |
|
{ |
|
__irqd_to_state(d) |= IRQD_SETAFFINITY_PENDING; |
|
} |
|
|
|
static inline void irqd_clr_move_pending(struct irq_data *d) |
|
{ |
|
__irqd_to_state(d) &= ~IRQD_SETAFFINITY_PENDING; |
|
} |
|
|
|
static inline void irqd_set_managed_shutdown(struct irq_data *d) |
|
{ |
|
__irqd_to_state(d) |= IRQD_MANAGED_SHUTDOWN; |
|
} |
|
|
|
static inline void irqd_clr_managed_shutdown(struct irq_data *d) |
|
{ |
|
__irqd_to_state(d) &= ~IRQD_MANAGED_SHUTDOWN; |
|
} |
|
|
|
static inline void irqd_clear(struct irq_data *d, unsigned int mask) |
|
{ |
|
__irqd_to_state(d) &= ~mask; |
|
} |
|
|
|
static inline void irqd_set(struct irq_data *d, unsigned int mask) |
|
{ |
|
__irqd_to_state(d) |= mask; |
|
} |
|
|
|
static inline bool irqd_has_set(struct irq_data *d, unsigned int mask) |
|
{ |
|
return __irqd_to_state(d) & mask; |
|
} |
|
|
|
static inline void irq_state_set_disabled(struct irq_desc *desc) |
|
{ |
|
irqd_set(&desc->irq_data, IRQD_IRQ_DISABLED); |
|
} |
|
|
|
static inline void irq_state_set_masked(struct irq_desc *desc) |
|
{ |
|
irqd_set(&desc->irq_data, IRQD_IRQ_MASKED); |
|
} |
|
|
|
#undef __irqd_to_state |
|
|
|
static inline void __kstat_incr_irqs_this_cpu(struct irq_desc *desc) |
|
{ |
|
__this_cpu_inc(*desc->kstat_irqs); |
|
__this_cpu_inc(kstat.irqs_sum); |
|
} |
|
|
|
static inline void kstat_incr_irqs_this_cpu(struct irq_desc *desc) |
|
{ |
|
__kstat_incr_irqs_this_cpu(desc); |
|
desc->tot_count++; |
|
} |
|
|
|
static inline int irq_desc_get_node(struct irq_desc *desc) |
|
{ |
|
return irq_common_data_get_node(&desc->irq_common_data); |
|
} |
|
|
|
static inline int irq_desc_is_chained(struct irq_desc *desc) |
|
{ |
|
return (desc->action && desc->action == &chained_action); |
|
} |
|
|
|
#ifdef CONFIG_PM_SLEEP |
|
bool irq_pm_check_wakeup(struct irq_desc *desc); |
|
void irq_pm_install_action(struct irq_desc *desc, struct irqaction *action); |
|
void irq_pm_remove_action(struct irq_desc *desc, struct irqaction *action); |
|
#else |
|
static inline bool irq_pm_check_wakeup(struct irq_desc *desc) { return false; } |
|
static inline void |
|
irq_pm_install_action(struct irq_desc *desc, struct irqaction *action) { } |
|
static inline void |
|
irq_pm_remove_action(struct irq_desc *desc, struct irqaction *action) { } |
|
#endif |
|
|
|
#ifdef CONFIG_IRQ_TIMINGS |
|
|
|
#define IRQ_TIMINGS_SHIFT 5 |
|
#define IRQ_TIMINGS_SIZE (1 << IRQ_TIMINGS_SHIFT) |
|
#define IRQ_TIMINGS_MASK (IRQ_TIMINGS_SIZE - 1) |
|
|
|
/** |
|
* struct irq_timings - irq timings storing structure |
|
* @values: a circular buffer of u64 encoded <timestamp,irq> values |
|
* @count: the number of elements in the array |
|
*/ |
|
struct irq_timings { |
|
u64 values[IRQ_TIMINGS_SIZE]; |
|
int count; |
|
}; |
|
|
|
DECLARE_PER_CPU(struct irq_timings, irq_timings); |
|
|
|
extern void irq_timings_free(int irq); |
|
extern int irq_timings_alloc(int irq); |
|
|
|
static inline void irq_remove_timings(struct irq_desc *desc) |
|
{ |
|
desc->istate &= ~IRQS_TIMINGS; |
|
|
|
irq_timings_free(irq_desc_get_irq(desc)); |
|
} |
|
|
|
static inline void irq_setup_timings(struct irq_desc *desc, struct irqaction *act) |
|
{ |
|
int irq = irq_desc_get_irq(desc); |
|
int ret; |
|
|
|
/* |
|
* We don't need the measurement because the idle code already |
|
* knows the next expiry event. |
|
*/ |
|
if (act->flags & __IRQF_TIMER) |
|
return; |
|
|
|
/* |
|
* In case the timing allocation fails, we just want to warn, |
|
* not fail, so letting the system boot anyway. |
|
*/ |
|
ret = irq_timings_alloc(irq); |
|
if (ret) { |
|
pr_warn("Failed to allocate irq timing stats for irq%d (%d)", |
|
irq, ret); |
|
return; |
|
} |
|
|
|
desc->istate |= IRQS_TIMINGS; |
|
} |
|
|
|
extern void irq_timings_enable(void); |
|
extern void irq_timings_disable(void); |
|
|
|
DECLARE_STATIC_KEY_FALSE(irq_timing_enabled); |
|
|
|
/* |
|
* The interrupt number and the timestamp are encoded into a single |
|
* u64 variable to optimize the size. |
|
* 48 bit time stamp and 16 bit IRQ number is way sufficient. |
|
* Who cares an IRQ after 78 hours of idle time? |
|
*/ |
|
static inline u64 irq_timing_encode(u64 timestamp, int irq) |
|
{ |
|
return (timestamp << 16) | irq; |
|
} |
|
|
|
static inline int irq_timing_decode(u64 value, u64 *timestamp) |
|
{ |
|
*timestamp = value >> 16; |
|
return value & U16_MAX; |
|
} |
|
|
|
static __always_inline void irq_timings_push(u64 ts, int irq) |
|
{ |
|
struct irq_timings *timings = this_cpu_ptr(&irq_timings); |
|
|
|
timings->values[timings->count & IRQ_TIMINGS_MASK] = |
|
irq_timing_encode(ts, irq); |
|
|
|
timings->count++; |
|
} |
|
|
|
/* |
|
* The function record_irq_time is only called in one place in the |
|
* interrupts handler. We want this function always inline so the code |
|
* inside is embedded in the function and the static key branching |
|
* code can act at the higher level. Without the explicit |
|
* __always_inline we can end up with a function call and a small |
|
* overhead in the hotpath for nothing. |
|
*/ |
|
static __always_inline void record_irq_time(struct irq_desc *desc) |
|
{ |
|
if (!static_branch_likely(&irq_timing_enabled)) |
|
return; |
|
|
|
if (desc->istate & IRQS_TIMINGS) |
|
irq_timings_push(local_clock(), irq_desc_get_irq(desc)); |
|
} |
|
#else |
|
static inline void irq_remove_timings(struct irq_desc *desc) {} |
|
static inline void irq_setup_timings(struct irq_desc *desc, |
|
struct irqaction *act) {}; |
|
static inline void record_irq_time(struct irq_desc *desc) {} |
|
#endif /* CONFIG_IRQ_TIMINGS */ |
|
|
|
|
|
#ifdef CONFIG_GENERIC_IRQ_CHIP |
|
void irq_init_generic_chip(struct irq_chip_generic *gc, const char *name, |
|
int num_ct, unsigned int irq_base, |
|
void __iomem *reg_base, irq_flow_handler_t handler); |
|
#else |
|
static inline void |
|
irq_init_generic_chip(struct irq_chip_generic *gc, const char *name, |
|
int num_ct, unsigned int irq_base, |
|
void __iomem *reg_base, irq_flow_handler_t handler) { } |
|
#endif /* CONFIG_GENERIC_IRQ_CHIP */ |
|
|
|
#ifdef CONFIG_GENERIC_PENDING_IRQ |
|
static inline bool irq_can_move_pcntxt(struct irq_data *data) |
|
{ |
|
return irqd_can_move_in_process_context(data); |
|
} |
|
static inline bool irq_move_pending(struct irq_data *data) |
|
{ |
|
return irqd_is_setaffinity_pending(data); |
|
} |
|
static inline void |
|
irq_copy_pending(struct irq_desc *desc, const struct cpumask *mask) |
|
{ |
|
cpumask_copy(desc->pending_mask, mask); |
|
} |
|
static inline void |
|
irq_get_pending(struct cpumask *mask, struct irq_desc *desc) |
|
{ |
|
cpumask_copy(mask, desc->pending_mask); |
|
} |
|
static inline struct cpumask *irq_desc_get_pending_mask(struct irq_desc *desc) |
|
{ |
|
return desc->pending_mask; |
|
} |
|
static inline bool handle_enforce_irqctx(struct irq_data *data) |
|
{ |
|
return irqd_is_handle_enforce_irqctx(data); |
|
} |
|
bool irq_fixup_move_pending(struct irq_desc *desc, bool force_clear); |
|
#else /* CONFIG_GENERIC_PENDING_IRQ */ |
|
static inline bool irq_can_move_pcntxt(struct irq_data *data) |
|
{ |
|
return true; |
|
} |
|
static inline bool irq_move_pending(struct irq_data *data) |
|
{ |
|
return false; |
|
} |
|
static inline void |
|
irq_copy_pending(struct irq_desc *desc, const struct cpumask *mask) |
|
{ |
|
} |
|
static inline void |
|
irq_get_pending(struct cpumask *mask, struct irq_desc *desc) |
|
{ |
|
} |
|
static inline struct cpumask *irq_desc_get_pending_mask(struct irq_desc *desc) |
|
{ |
|
return NULL; |
|
} |
|
static inline bool irq_fixup_move_pending(struct irq_desc *desc, bool fclear) |
|
{ |
|
return false; |
|
} |
|
static inline bool handle_enforce_irqctx(struct irq_data *data) |
|
{ |
|
return false; |
|
} |
|
#endif /* !CONFIG_GENERIC_PENDING_IRQ */ |
|
|
|
#if !defined(CONFIG_IRQ_DOMAIN) || !defined(CONFIG_IRQ_DOMAIN_HIERARCHY) |
|
static inline int irq_domain_activate_irq(struct irq_data *data, bool reserve) |
|
{ |
|
irqd_set_activated(data); |
|
return 0; |
|
} |
|
static inline void irq_domain_deactivate_irq(struct irq_data *data) |
|
{ |
|
irqd_clr_activated(data); |
|
} |
|
#endif |
|
|
|
static inline struct irq_data *irqd_get_parent_data(struct irq_data *irqd) |
|
{ |
|
#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY |
|
return irqd->parent_data; |
|
#else |
|
return NULL; |
|
#endif |
|
} |
|
|
|
#ifdef CONFIG_GENERIC_IRQ_DEBUGFS |
|
#include <linux/debugfs.h> |
|
|
|
void irq_add_debugfs_entry(unsigned int irq, struct irq_desc *desc); |
|
static inline void irq_remove_debugfs_entry(struct irq_desc *desc) |
|
{ |
|
debugfs_remove(desc->debugfs_file); |
|
kfree(desc->dev_name); |
|
} |
|
void irq_debugfs_copy_devname(int irq, struct device *dev); |
|
# ifdef CONFIG_IRQ_DOMAIN |
|
void irq_domain_debugfs_init(struct dentry *root); |
|
# else |
|
static inline void irq_domain_debugfs_init(struct dentry *root) |
|
{ |
|
} |
|
# endif |
|
#else /* CONFIG_GENERIC_IRQ_DEBUGFS */ |
|
static inline void irq_add_debugfs_entry(unsigned int irq, struct irq_desc *d) |
|
{ |
|
} |
|
static inline void irq_remove_debugfs_entry(struct irq_desc *d) |
|
{ |
|
} |
|
static inline void irq_debugfs_copy_devname(int irq, struct device *dev) |
|
{ |
|
} |
|
#endif /* CONFIG_GENERIC_IRQ_DEBUGFS */
|
|
|