diff options
Diffstat (limited to 'kernel/irq')
| -rw-r--r-- | kernel/irq/Kconfig | 5 | ||||
| -rw-r--r-- | kernel/irq/chip.c | 29 | ||||
| -rw-r--r-- | kernel/irq/generic-chip.c | 2 | ||||
| -rw-r--r-- | kernel/irq/irqdesc.c | 51 | ||||
| -rw-r--r-- | kernel/irq/irqdomain.c | 32 | ||||
| -rw-r--r-- | kernel/irq/manage.c | 70 |
6 files changed, 97 insertions, 92 deletions
diff --git a/kernel/irq/Kconfig b/kernel/irq/Kconfig index 164a031cfdb6..d79ef2493a28 100644 --- a/kernel/irq/Kconfig +++ b/kernel/irq/Kconfig @@ -26,11 +26,6 @@ config GENERIC_IRQ_SHOW_LEVEL config GENERIC_IRQ_EFFECTIVE_AFF_MASK bool -# Facility to allocate a hardware interrupt. This is legacy support -# and should not be used in new code. Use irq domains instead. -config GENERIC_IRQ_LEGACY_ALLOC_HWIRQ - bool - # Support for delayed migration from interrupt context config GENERIC_PENDING_IRQ bool diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c index b9b9618e1aca..6d89e33fe3aa 100644 --- a/kernel/irq/chip.c +++ b/kernel/irq/chip.c @@ -61,7 +61,7 @@ int irq_set_chip(unsigned int irq, struct irq_chip *chip) EXPORT_SYMBOL(irq_set_chip); /** - * irq_set_type - set the irq trigger type for an irq + * irq_set_irq_type - set the irq trigger type for an irq * @irq: irq number * @type: IRQ_TYPE_{LEVEL,EDGE}_* value - see include/linux/irq.h */ @@ -945,33 +945,6 @@ void handle_percpu_devid_irq(struct irq_desc *desc) } /** - * handle_percpu_devid_fasteoi_ipi - Per CPU local IPI handler with per cpu - * dev ids - * @desc: the interrupt description structure for this irq - * - * The biggest difference with the IRQ version is that the interrupt is - * EOIed early, as the IPI could result in a context switch, and we need to - * make sure the IPI can fire again. We also assume that the arch code has - * registered an action. If not, we are positively doomed. - */ -void handle_percpu_devid_fasteoi_ipi(struct irq_desc *desc) -{ - struct irq_chip *chip = irq_desc_get_chip(desc); - struct irqaction *action = desc->action; - unsigned int irq = irq_desc_get_irq(desc); - irqreturn_t res; - - __kstat_incr_irqs_this_cpu(desc); - - if (chip->irq_eoi) - chip->irq_eoi(&desc->irq_data); - - trace_irq_handler_entry(irq, action); - res = action->handler(irq, raw_cpu_ptr(action->percpu_dev_id)); - trace_irq_handler_exit(irq, action, res); -} - -/** * handle_percpu_devid_fasteoi_nmi - Per CPU local NMI handler with per cpu * dev ids * @desc: the interrupt description structure for this irq diff --git a/kernel/irq/generic-chip.c b/kernel/irq/generic-chip.c index e2999a070a99..a23ac2bbf433 100644 --- a/kernel/irq/generic-chip.c +++ b/kernel/irq/generic-chip.c @@ -269,7 +269,7 @@ irq_gc_init_mask_cache(struct irq_chip_generic *gc, enum irq_gc_flags flags) } /** - * __irq_alloc_domain_generic_chip - Allocate generic chips for an irq domain + * __irq_alloc_domain_generic_chips - Allocate generic chips for an irq domain * @d: irq domain for which to allocate chips * @irqs_per_chip: Number of interrupts each chip handles (max 32) * @num_ct: Number of irq_chip_type instances associated with this diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c index 1a7723604399..e810eb9906ea 100644 --- a/kernel/irq/irqdesc.c +++ b/kernel/irq/irqdesc.c @@ -810,57 +810,6 @@ unlock: } EXPORT_SYMBOL_GPL(__irq_alloc_descs); -#ifdef CONFIG_GENERIC_IRQ_LEGACY_ALLOC_HWIRQ -/** - * irq_alloc_hwirqs - Allocate an irq descriptor and initialize the hardware - * @cnt: number of interrupts to allocate - * @node: node on which to allocate - * - * Returns an interrupt number > 0 or 0, if the allocation fails. - */ -unsigned int irq_alloc_hwirqs(int cnt, int node) -{ - int i, irq = __irq_alloc_descs(-1, 0, cnt, node, NULL, NULL); - - if (irq < 0) - return 0; - - for (i = irq; cnt > 0; i++, cnt--) { - if (arch_setup_hwirq(i, node)) - goto err; - irq_clear_status_flags(i, _IRQ_NOREQUEST); - } - return irq; - -err: - for (i--; i >= irq; i--) { - irq_set_status_flags(i, _IRQ_NOREQUEST | _IRQ_NOPROBE); - arch_teardown_hwirq(i); - } - irq_free_descs(irq, cnt); - return 0; -} -EXPORT_SYMBOL_GPL(irq_alloc_hwirqs); - -/** - * irq_free_hwirqs - Free irq descriptor and cleanup the hardware - * @from: Free from irq number - * @cnt: number of interrupts to free - * - */ -void irq_free_hwirqs(unsigned int from, int cnt) -{ - int i, j; - - for (i = from, j = cnt; j > 0; i++, j--) { - irq_set_status_flags(i, _IRQ_NOREQUEST | _IRQ_NOPROBE); - arch_teardown_hwirq(i); - } - irq_free_descs(from, cnt); -} -EXPORT_SYMBOL_GPL(irq_free_hwirqs); -#endif - /** * irq_get_next_irq - get next allocated irq number * @offset: where to start the search diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c index a21acac9a71a..6aacd342cd14 100644 --- a/kernel/irq/irqdomain.c +++ b/kernel/irq/irqdomain.c @@ -360,16 +360,27 @@ struct irq_domain *irq_domain_add_legacy(struct device_node *of_node, const struct irq_domain_ops *ops, void *host_data) { + return irq_domain_create_legacy(of_node_to_fwnode(of_node), size, + first_irq, first_hwirq, ops, host_data); +} +EXPORT_SYMBOL_GPL(irq_domain_add_legacy); + +struct irq_domain *irq_domain_create_legacy(struct fwnode_handle *fwnode, + unsigned int size, + unsigned int first_irq, + irq_hw_number_t first_hwirq, + const struct irq_domain_ops *ops, + void *host_data) +{ struct irq_domain *domain; - domain = __irq_domain_add(of_node_to_fwnode(of_node), first_hwirq + size, - first_hwirq + size, 0, ops, host_data); + domain = __irq_domain_add(fwnode, first_hwirq + size, first_hwirq + size, 0, ops, host_data); if (domain) irq_domain_associate_many(domain, first_irq, first_hwirq, size); return domain; } -EXPORT_SYMBOL_GPL(irq_domain_add_legacy); +EXPORT_SYMBOL_GPL(irq_domain_create_legacy); /** * irq_find_matching_fwspec() - Locates a domain for a given fwspec @@ -494,7 +505,7 @@ static void irq_domain_set_mapping(struct irq_domain *domain, } } -void irq_domain_disassociate(struct irq_domain *domain, unsigned int irq) +static void irq_domain_disassociate(struct irq_domain *domain, unsigned int irq) { struct irq_data *irq_data = irq_get_irq_data(irq); irq_hw_number_t hwirq; @@ -749,7 +760,7 @@ static void of_phandle_args_to_fwspec(struct device_node *np, const u32 *args, { int i; - fwspec->fwnode = np ? &np->fwnode : NULL; + fwspec->fwnode = of_node_to_fwnode(np); fwspec->param_count = count; for (i = 0; i < count; i++) @@ -1382,8 +1393,15 @@ static void irq_domain_free_irqs_hierarchy(struct irq_domain *domain, unsigned int irq_base, unsigned int nr_irqs) { - if (domain->ops->free) - domain->ops->free(domain, irq_base, nr_irqs); + unsigned int i; + + if (!domain->ops->free) + return; + + for (i = 0; i < nr_irqs; i++) { + if (irq_domain_get_irq_data(domain, irq_base + i)) + domain->ops->free(domain, irq_base + i, 1); + } } int irq_domain_alloc_irqs_hierarchy(struct irq_domain *domain, diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index c460e0496006..c826ba4141fe 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -371,6 +371,76 @@ int irq_set_affinity_locked(struct irq_data *data, const struct cpumask *mask, return ret; } +/** + * irq_update_affinity_desc - Update affinity management for an interrupt + * @irq: The interrupt number to update + * @affinity: Pointer to the affinity descriptor + * + * This interface can be used to configure the affinity management of + * interrupts which have been allocated already. + * + * There are certain limitations on when it may be used - attempts to use it + * for when the kernel is configured for generic IRQ reservation mode (in + * config GENERIC_IRQ_RESERVATION_MODE) will fail, as it may conflict with + * managed/non-managed interrupt accounting. In addition, attempts to use it on + * an interrupt which is already started or which has already been configured + * as managed will also fail, as these mean invalid init state or double init. + */ +int irq_update_affinity_desc(unsigned int irq, + struct irq_affinity_desc *affinity) +{ + struct irq_desc *desc; + unsigned long flags; + bool activated; + int ret = 0; + + /* + * Supporting this with the reservation scheme used by x86 needs + * some more thought. Fail it for now. + */ + if (IS_ENABLED(CONFIG_GENERIC_IRQ_RESERVATION_MODE)) + return -EOPNOTSUPP; + + desc = irq_get_desc_buslock(irq, &flags, 0); + if (!desc) + return -EINVAL; + + /* Requires the interrupt to be shut down */ + if (irqd_is_started(&desc->irq_data)) { + ret = -EBUSY; + goto out_unlock; + } + + /* Interrupts which are already managed cannot be modified */ + if (irqd_affinity_is_managed(&desc->irq_data)) { + ret = -EBUSY; + goto out_unlock; + } + + /* + * Deactivate the interrupt. That's required to undo + * anything an earlier activation has established. + */ + activated = irqd_is_activated(&desc->irq_data); + if (activated) + irq_domain_deactivate_irq(&desc->irq_data); + + if (affinity->is_managed) { + irqd_set(&desc->irq_data, IRQD_AFFINITY_MANAGED); + irqd_set(&desc->irq_data, IRQD_MANAGED_SHUTDOWN); + } + + cpumask_copy(desc->irq_common_data.affinity, &affinity->mask); + + /* Restore the activation state */ + if (activated) + irq_domain_activate_irq(&desc->irq_data, false); + +out_unlock: + irq_put_desc_busunlock(desc, flags); + return ret; +} + int __irq_set_affinity(unsigned int irq, const struct cpumask *mask, bool force) { struct irq_desc *desc = irq_to_desc(irq); |