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static irqreturn_t bad_chained_irq(int irq, void *dev_id) { WARN_ONCE(1, "Chained irq %d should not call an action\n", irq); return IRQ_NONE; } struct irqaction chained_action = { .handler = bad_chained_irq, } ; int irq_set_chip(unsigned int irq, struct irq_chip *chip) { unsigned long flags; struct irq_desc *desc = irq_get_desc_lock(irq, &flags, 0); if (!desc)return -EINVAL; if (!chip)chip = &no_irq_chip; desc->irq_data.chip = chip; irq_put_desc_unlock(desc, flags); irq_mark_irq(irq); return 0; } EXPORT_SYMBOL(irq_set_chip); int irq_set_irq_type(unsigned int irq, unsigned int type) { unsigned long flags; struct irq_desc *desc = irq_get_desc_buslock(irq, &flags, IRQ_GET_DESC_CHECK_GLOBAL); int ret = 0; if (!desc)return -EINVAL; type &= IRQ_TYPE_SENSE_MASK; ret = __irq_set_trigger(desc, type); irq_put_desc_busunlock(desc, flags); return ret; } EXPORT_SYMBOL(irq_set_irq_type); int irq_set_handler_data(unsigned int irq, void *data) { unsigned long flags; struct irq_desc *desc = irq_get_desc_lock(irq, &flags, 0); if (!desc)return -EINVAL; desc->irq_common_data.handler_data = data; irq_put_desc_unlock(desc, flags); return 0; } EXPORT_SYMBOL(irq_set_handler_data); int irq_set_msi_desc_off(unsigned int irq_base, unsigned int irq_offset,struct msi_desc *entry) { unsigned long flags; struct irq_desc *desc = irq_get_desc_lock(irq_base + irq_offset, &flags, IRQ_GET_DESC_CHECK_GLOBAL); if (!desc)return -EINVAL; desc->irq_common_data.msi_desc = entry; if (entry && !irq_offset)entry->irq = irq_base; irq_put_desc_unlock(desc, flags); return 0; } int irq_set_msi_desc(unsigned int irq, struct msi_desc *entry) { return irq_set_msi_desc_off(irq, 0, entry); } int irq_set_chip_data(unsigned int irq, void *data) { unsigned long flags; struct irq_desc *desc = irq_get_desc_lock(irq, &flags, 0); if (!desc)return -EINVAL; desc->irq_data.chip_data = data; irq_put_desc_unlock(desc, flags); return 0; } EXPORT_SYMBOL(irq_set_chip_data); struct irq_data *irq_get_irq_data(unsigned int irq) { struct irq_desc *desc = irq_to_desc(irq); return desc ? &desc->irq_data : NULL; } EXPORT_SYMBOL_GPL(irq_get_irq_data); static void irq_state_clr_disabled(struct irq_desc *desc) { irqd_clear(&desc->irq_data, IRQD_IRQ_DISABLED); } static void irq_state_set_disabled(struct irq_desc *desc) { irqd_set(&desc->irq_data, IRQD_IRQ_DISABLED); } static void irq_state_clr_masked(struct irq_desc *desc) { irqd_clear(&desc->irq_data, IRQD_IRQ_MASKED); } static void irq_state_set_masked(struct irq_desc *desc) { irqd_set(&desc->irq_data, IRQD_IRQ_MASKED); } int irq_startup(struct irq_desc *desc, bool resend) { int ret = 0; irq_state_clr_disabled(desc); desc->depth = 0; irq_domain_activate_irq(&desc->irq_data); if (desc->irq_data.chip->irq_startup) { ret = desc->irq_data.chip->irq_startup(&desc->irq_data); irq_state_clr_masked(desc); } else { irq_enable(desc); } if (resend)check_irq_resend(desc); return ret; } void irq_shutdown(struct irq_desc *desc) { irq_state_set_disabled(desc); desc->depth = 1; if (desc->irq_data.chip->irq_shutdown)desc->irq_data.chip->irq_shutdown(&desc->irq_data); else if (desc->irq_data.chip->irq_disable)desc->irq_data.chip->irq_disable(&desc->irq_data); elsedesc->irq_data.chip->irq_mask(&desc->irq_data); irq_domain_deactivate_irq(&desc->irq_data); irq_state_set_masked(desc); } void irq_enable(struct irq_desc *desc) { irq_state_clr_disabled(desc); if (desc->irq_data.chip->irq_enable)desc->irq_data.chip->irq_enable(&desc->irq_data); elsedesc->irq_data.chip->irq_unmask(&desc->irq_data); irq_state_clr_masked(desc); } void irq_disable(struct irq_desc *desc) { irq_state_set_disabled(desc); if (desc->irq_data.chip->irq_disable) { desc->irq_data.chip->irq_disable(&desc->irq_data); irq_state_set_masked(desc); } else if (irq_settings_disable_unlazy(desc)) { mask_irq(desc); } } void irq_percpu_enable(struct irq_desc *desc, unsigned int cpu) { if (desc->irq_data.chip->irq_enable)desc->irq_data.chip->irq_enable(&desc->irq_data); elsedesc->irq_data.chip->irq_unmask(&desc->irq_data); cpumask_set_cpu(cpu, desc->percpu_enabled); } void irq_percpu_disable(struct irq_desc *desc, unsigned int cpu) { if (desc->irq_data.chip->irq_disable)desc->irq_data.chip->irq_disable(&desc->irq_data); elsedesc->irq_data.chip->irq_mask(&desc->irq_data); cpumask_clear_cpu(cpu, desc->percpu_enabled); } static inline void mask_ack_irq(struct irq_desc *desc) { if (desc->irq_data.chip->irq_mask_ack)desc->irq_data.chip->irq_mask_ack(&desc->irq_data); else { desc->irq_data.chip->irq_mask(&desc->irq_data); if (desc->irq_data.chip->irq_ack)desc->irq_data.chip->irq_ack(&desc->irq_data); } irq_state_set_masked(desc); } void mask_irq(struct irq_desc *desc) { if (desc->irq_data.chip->irq_mask) { desc->irq_data.chip->irq_mask(&desc->irq_data); irq_state_set_masked(desc); } } void unmask_irq(struct irq_desc *desc) { if (desc->irq_data.chip->irq_unmask) { desc->irq_data.chip->irq_unmask(&desc->irq_data); irq_state_clr_masked(desc); } } void unmask_threaded_irq(struct irq_desc *desc) { struct irq_chip *chip = desc->irq_data.chip; if (chip->flags & IRQCHIP_EOI_THREADED)chip->irq_eoi(&desc->irq_data); if (chip->irq_unmask) { chip->irq_unmask(&desc->irq_data); irq_state_clr_masked(desc); } } void handle_nested_irq(unsigned int irq) { struct irq_desc *desc = irq_to_desc(irq); struct irqaction *action; irqreturn_t action_ret; might_sleep(); raw_spin_lock_irq(&desc->lock); desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING); action = desc->action; if (unlikely(!action || irqd_irq_disabled(&desc->irq_data))) { desc->istate |= IRQS_PENDING; goto out_unlock; } kstat_incr_irqs_this_cpu(desc); irqd_set(&desc->irq_data, IRQD_IRQ_INPROGRESS); raw_spin_unlock_irq(&desc->lock); action_ret = action->thread_fn(action->irq, action->dev_id); if (!noirqdebug)note_interrupt(desc, action_ret); raw_spin_lock_irq(&desc->lock); irqd_clear(&desc->irq_data, IRQD_IRQ_INPROGRESS); out_unlock:raw_spin_unlock_irq(&desc->lock); } EXPORT_SYMBOL_GPL(handle_nested_irq); static bool irq_check_poll(struct irq_desc *desc) { if (!(desc->istate & IRQS_POLL_INPROGRESS))return false; return irq_wait_for_poll(desc); } static bool irq_may_run(struct irq_desc *desc) { unsigned int mask = IRQD_IRQ_INPROGRESS | IRQD_WAKEUP_ARMED; if (!irqd_has_set(&desc->irq_data, mask))return true; if (irq_pm_check_wakeup(desc))return false; return irq_check_poll(desc); } void handle_simple_irq(struct irq_desc *desc) { raw_spin_lock(&desc->lock); if (!irq_may_run(desc))goto out_unlock; desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING); if (unlikely(!desc->action || irqd_irq_disabled(&desc->irq_data))) { desc->istate |= IRQS_PENDING; goto out_unlock; } kstat_incr_irqs_this_cpu(desc); handle_irq_event(desc); out_unlock:raw_spin_unlock(&desc->lock); } EXPORT_SYMBOL_GPL(handle_simple_irq); void handle_untracked_irq(struct irq_desc *desc) { unsigned int flags = 0; raw_spin_lock(&desc->lock); if (!irq_may_run(desc))goto out_unlock; desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING); if (unlikely(!desc->action || irqd_irq_disabled(&desc->irq_data))) { desc->istate |= IRQS_PENDING; goto out_unlock; } desc->istate &= ~IRQS_PENDING; irqd_set(&desc->irq_data, IRQD_IRQ_INPROGRESS); raw_spin_unlock(&desc->lock); __handle_irq_event_percpu(desc, &flags); raw_spin_lock(&desc->lock); irqd_clear(&desc->irq_data, IRQD_IRQ_INPROGRESS); out_unlock:raw_spin_unlock(&desc->lock); } EXPORT_SYMBOL_GPL(handle_untracked_irq); static void cond_unmask_irq(struct irq_desc *desc) { if (!irqd_irq_disabled(&desc->irq_data) &&irqd_irq_masked(&desc->irq_data) && !desc->threads_oneshot)unmask_irq(desc); } void handle_level_irq(struct irq_desc *desc) { raw_spin_lock(&desc->lock); mask_ack_irq(desc); if (!irq_may_run(desc))goto out_unlock; desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING); if (unlikely(!desc->action || irqd_irq_disabled(&desc->irq_data))) { desc->istate |= IRQS_PENDING; goto out_unlock; } kstat_incr_irqs_this_cpu(desc); handle_irq_event(desc); cond_unmask_irq(desc); out_unlock:raw_spin_unlock(&desc->lock); } EXPORT_SYMBOL_GPL(handle_level_irq); #ifdef CONFIG_IRQ_PREFLOW_FASTEOIstatic inline void preflow_handler(struct irq_desc *desc) { if (desc->preflow_handler)desc->preflow_handler(&desc->irq_data); } #elsestatic inline void preflow_handler(struct irq_desc *desc) { } #endifstatic void cond_unmask_eoi_irq(struct irq_desc *desc, struct irq_chip *chip) { if (!(desc->istate & IRQS_ONESHOT)) { chip->irq_eoi(&desc->irq_data); return; } if (!irqd_irq_disabled(&desc->irq_data) &&irqd_irq_masked(&desc->irq_data) && !desc->threads_oneshot) { chip->irq_eoi(&desc->irq_data); unmask_irq(desc); } else if (!(chip->flags & IRQCHIP_EOI_THREADED)) { chip->irq_eoi(&desc->irq_data); } } void handle_fasteoi_irq(struct irq_desc *desc) { struct irq_chip *chip = desc->irq_data.chip; raw_spin_lock(&desc->lock); if (!irq_may_run(desc))goto out; desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING); if (unlikely(!desc->action || irqd_irq_disabled(&desc->irq_data))) { desc->istate |= IRQS_PENDING; mask_irq(desc); goto out; } kstat_incr_irqs_this_cpu(desc); if (desc->istate & IRQS_ONESHOT)mask_irq(desc); preflow_handler(desc); handle_irq_event(desc); cond_unmask_eoi_irq(desc, chip); raw_spin_unlock(&desc->lock); return; out:if (!(chip->flags & IRQCHIP_EOI_IF_HANDLED))chip->irq_eoi(&desc->irq_data); raw_spin_unlock(&desc->lock); } EXPORT_SYMBOL_GPL(handle_fasteoi_irq); void handle_edge_irq(struct irq_desc *desc) { raw_spin_lock(&desc->lock); desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING); if (!irq_may_run(desc)) { desc->istate |= IRQS_PENDING; mask_ack_irq(desc); goto out_unlock; } if (irqd_irq_disabled(&desc->irq_data) || !desc->action) { desc->istate |= IRQS_PENDING; mask_ack_irq(desc); goto out_unlock; } kstat_incr_irqs_this_cpu(desc); desc->irq_data.chip->irq_ack(&desc->irq_data); do { if (unlikely(!desc->action)) { mask_irq(desc); goto out_unlock; } if (unlikely(desc->istate & IRQS_PENDING)) { if (!irqd_irq_disabled(&desc->irq_data) &&irqd_irq_masked(&desc->irq_data))unmask_irq(desc); } handle_irq_event(desc); } while ((desc->istate & IRQS_PENDING) &&!irqd_irq_disabled(&desc->irq_data)); out_unlock:raw_spin_unlock(&desc->lock); } EXPORT_SYMBOL(handle_edge_irq); #ifdef CONFIG_IRQ_EDGE_EOI_HANDLERvoid handle_edge_eoi_irq(struct irq_desc *desc) { struct irq_chip *chip = irq_desc_get_chip(desc); raw_spin_lock(&desc->lock); desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING); if (!irq_may_run(desc)) { desc->istate |= IRQS_PENDING; goto out_eoi; } if (irqd_irq_disabled(&desc->irq_data) || !desc->action) { desc->istate |= IRQS_PENDING; goto out_eoi; } kstat_incr_irqs_this_cpu(desc); do { if (unlikely(!desc->action))goto out_eoi; handle_irq_event(desc); } while ((desc->istate & IRQS_PENDING) &&!irqd_irq_disabled(&desc->irq_data)); out_eoi:chip->irq_eoi(&desc->irq_data); raw_spin_unlock(&desc->lock); } #endifvoid handle_percpu_irq(struct irq_desc *desc) { struct irq_chip *chip = irq_desc_get_chip(desc); kstat_incr_irqs_this_cpu(desc); if (chip->irq_ack)chip->irq_ack(&desc->irq_data); handle_irq_event_percpu(desc); if (chip->irq_eoi)chip->irq_eoi(&desc->irq_data); } void handle_percpu_devid_irq(struct irq_desc *desc) { struct irq_chip *chip = irq_desc_get_chip(desc); struct irqaction *action = desc->action; void *dev_id = raw_cpu_ptr(action->percpu_dev_id); unsigned int irq = irq_desc_get_irq(desc); irqreturn_t res; kstat_incr_irqs_this_cpu(desc); if (chip->irq_ack)chip->irq_ack(&desc->irq_data); trace_irq_handler_entry(irq, action); res = action->handler(irq, dev_id); trace_irq_handler_exit(irq, action, res); if (chip->irq_eoi)chip->irq_eoi(&desc->irq_data); } void__irq_do_set_handler(struct irq_desc *desc, irq_flow_handler_t handle,int is_chained, const char *name) { if (!handle) { handle = handle_bad_irq; } else { struct irq_data *irq_data = &desc->irq_data; #ifdef CONFIG_IRQ_DOMAIN_HIERARCHYwhile (irq_data) { if (irq_data->chip != &no_irq_chip)break; if (WARN_ON(is_chained))return; irq_data = irq_data->parent_data; } #endifif (WARN_ON(!irq_data || irq_data->chip == &no_irq_chip))return; } if (handle == handle_bad_irq) { if (desc->irq_data.chip != &no_irq_chip)mask_ack_irq(desc); irq_state_set_disabled(desc); if (is_chained)desc->action = NULL; desc->depth = 1; } desc->handle_irq = handle; desc->name = name; if (handle != handle_bad_irq && is_chained) { __irq_set_trigger(desc, irqd_get_trigger_type(&desc->irq_data)); desc->handle_irq = handle; irq_settings_set_noprobe(desc); irq_settings_set_norequest(desc); irq_settings_set_nothread(desc); desc->action = &chained_action; irq_startup(desc, true); } } void__irq_set_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained,const char *name) { unsigned long flags; struct irq_desc *desc = irq_get_desc_buslock(irq, &flags, 0); if (!desc)return; __irq_do_set_handler(desc, handle, is_chained, name); irq_put_desc_busunlock(desc, flags); } EXPORT_SYMBOL_GPL(__irq_set_handler); voidirq_set_chained_handler_and_data(unsigned int irq, irq_flow_handler_t handle,void *data) { unsigned long flags; struct irq_desc *desc = irq_get_desc_buslock(irq, &flags, 0); if (!desc)return; __irq_do_set_handler(desc, handle, 1, NULL); desc->irq_common_data.handler_data = data; irq_put_desc_busunlock(desc, flags); } EXPORT_SYMBOL_GPL(irq_set_chained_handler_and_data); voidirq_set_chip_and_handler_name(unsigned int irq, struct irq_chip *chip,irq_flow_handler_t handle, const char *name) { irq_set_chip(irq, chip); __irq_set_handler(irq, handle, 0, name); } EXPORT_SYMBOL_GPL(irq_set_chip_and_handler_name); void irq_modify_status(unsigned int irq, unsigned long clr, unsigned long set) { unsigned long flags; struct irq_desc *desc = irq_get_desc_lock(irq, &flags, 0); if (!desc)return; irq_settings_clr_and_set(desc, clr, set); irqd_clear(&desc->irq_data, IRQD_NO_BALANCING | IRQD_PER_CPU |IRQD_TRIGGER_MASK | IRQD_LEVEL | IRQD_MOVE_PCNTXT); if (irq_settings_has_no_balance_set(desc))irqd_set(&desc->irq_data, IRQD_NO_BALANCING); if (irq_settings_is_per_cpu(desc))irqd_set(&desc->irq_data, IRQD_PER_CPU); if (irq_settings_can_move_pcntxt(desc))irqd_set(&desc->irq_data, IRQD_MOVE_PCNTXT); if (irq_settings_is_level(desc))irqd_set(&desc->irq_data, IRQD_LEVEL); irqd_set(&desc->irq_data, irq_settings_get_trigger_mask(desc)); irq_put_desc_unlock(desc, flags); } EXPORT_SYMBOL_GPL(irq_modify_status); void irq_cpu_online(void) { struct irq_desc *desc; struct irq_chip *chip; unsigned long flags; unsigned int irq; for_each_active_irq(irq) { desc = irq_to_desc(irq); if (!desc)continue; raw_spin_lock_irqsave(&desc->lock, flags); chip = irq_data_get_irq_chip(&desc->irq_data); if (chip && chip->irq_cpu_online &&(!(chip->flags & IRQCHIP_ONOFFLINE_ENABLED) ||!irqd_irq_disabled(&desc->irq_data)))chip->irq_cpu_online(&desc->irq_data); raw_spin_unlock_irqrestore(&desc->lock, flags); } } void irq_cpu_offline(void) { struct irq_desc *desc; struct irq_chip *chip; unsigned long flags; unsigned int irq; for_each_active_irq(irq) { desc = irq_to_desc(irq); if (!desc)continue; raw_spin_lock_irqsave(&desc->lock, flags); chip = irq_data_get_irq_chip(&desc->irq_data); if (chip && chip->irq_cpu_offline &&(!(chip->flags & IRQCHIP_ONOFFLINE_ENABLED) ||!irqd_irq_disabled(&desc->irq_data)))chip->irq_cpu_offline(&desc->irq_data); raw_spin_unlock_irqrestore(&desc->lock, flags); } } #ifdef CONFIG_IRQ_DOMAIN_HIERARCHYvoid irq_chip_enable_parent(struct irq_data *data) { data = data->parent_data; if (data->chip->irq_enable)data->chip->irq_enable(data); elsedata->chip->irq_unmask(data); } void irq_chip_disable_parent(struct irq_data *data) { data = data->parent_data; if (data->chip->irq_disable)data->chip->irq_disable(data); elsedata->chip->irq_mask(data); } void irq_chip_ack_parent(struct irq_data *data) { data = data->parent_data; data->chip->irq_ack(data); } EXPORT_SYMBOL_GPL(irq_chip_ack_parent); void irq_chip_mask_parent(struct irq_data *data) { data = data->parent_data; data->chip->irq_mask(data); } EXPORT_SYMBOL_GPL(irq_chip_mask_parent); void irq_chip_unmask_parent(struct irq_data *data) { data = data->parent_data; data->chip->irq_unmask(data); } EXPORT_SYMBOL_GPL(irq_chip_unmask_parent); void irq_chip_eoi_parent(struct irq_data *data) { data = data->parent_data; data->chip->irq_eoi(data); } EXPORT_SYMBOL_GPL(irq_chip_eoi_parent); int irq_chip_set_affinity_parent(struct irq_data *data,const struct cpumask *dest, bool force) { data = data->parent_data; if (data->chip->irq_set_affinity)return data->chip->irq_set_affinity(data, dest, force); return -ENOSYS; } int irq_chip_set_type_parent(struct irq_data *data, unsigned int type) { data = data->parent_data; if (data->chip->irq_set_type)return data->chip->irq_set_type(data, type); return -ENOSYS; } EXPORT_SYMBOL_GPL(irq_chip_set_type_parent); int irq_chip_retrigger_hierarchy(struct irq_data *data) { for (data = data->parent_data; data; data = data->parent_data)if (data->chip && data->chip->irq_retrigger)return data->chip->irq_retrigger(data); return 0; } int irq_chip_set_vcpu_affinity_parent(struct irq_data *data, void *vcpu_info) { data = data->parent_data; if (data->chip->irq_set_vcpu_affinity)return data->chip->irq_set_vcpu_affinity(data, vcpu_info); return -ENOSYS; } int irq_chip_set_wake_parent(struct irq_data *data, unsigned int on) { data = data->parent_data; if (data->chip->irq_set_wake)return data->chip->irq_set_wake(data, on); return -ENOSYS; } #endifint irq_chip_compose_msi_msg(struct irq_data *data, struct msi_msg *msg) { struct irq_data *pos = NULL; #ifdef CONFIG_IRQ_DOMAIN_HIERARCHYfor (; data; data = data->parent_data)#endifif (data->chip && data->chip->irq_compose_msi_msg)pos = data; if (!pos)return -ENOSYS; pos->chip->irq_compose_msi_msg(pos, msg); return 0; } int irq_chip_pm_get(struct irq_data *data) { int retval; if (IS_ENABLED(CONFIG_PM) && data->chip->parent_device) { retval = pm_runtime_get_sync(data->chip->parent_device); if (retval < 0) { pm_runtime_put_noidle(data->chip->parent_device); return retval; } } return 0; } int irq_chip_pm_put(struct irq_data *data) { int retval = 0; if (IS_ENABLED(CONFIG_PM) && data->chip->parent_device)retval = pm_runtime_put(data->chip->parent_device); return (retval < 0) ? retval : 0; }

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