diff options
Diffstat (limited to 'kernel/irq')
-rw-r--r-- | kernel/irq/ipi.c | 46 | ||||
-rw-r--r-- | kernel/irq/irqdesc.c | 26 | ||||
-rw-r--r-- | kernel/irq/irqdomain.c | 19 | ||||
-rw-r--r-- | kernel/irq/manage.c | 2 |
4 files changed, 66 insertions, 27 deletions
diff --git a/kernel/irq/ipi.c b/kernel/irq/ipi.c index c37f34b..c427422 100644 --- a/kernel/irq/ipi.c +++ b/kernel/irq/ipi.c @@ -19,9 +19,9 @@ * * Allocate a virq that can be used to send IPI to any CPU in dest mask. * - * On success it'll return linux irq number and 0 on failure + * On success it'll return linux irq number and error code on failure */ -unsigned int irq_reserve_ipi(struct irq_domain *domain, +int irq_reserve_ipi(struct irq_domain *domain, const struct cpumask *dest) { unsigned int nr_irqs, offset; @@ -30,18 +30,18 @@ unsigned int irq_reserve_ipi(struct irq_domain *domain, if (!domain ||!irq_domain_is_ipi(domain)) { pr_warn("Reservation on a non IPI domain\n"); - return 0; + return -EINVAL; } if (!cpumask_subset(dest, cpu_possible_mask)) { pr_warn("Reservation is not in possible_cpu_mask\n"); - return 0; + return -EINVAL; } nr_irqs = cpumask_weight(dest); if (!nr_irqs) { pr_warn("Reservation for empty destination mask\n"); - return 0; + return -EINVAL; } if (irq_domain_is_ipi_single(domain)) { @@ -72,14 +72,14 @@ unsigned int irq_reserve_ipi(struct irq_domain *domain, next = cpumask_next(next, dest); if (next < nr_cpu_ids) { pr_warn("Destination mask has holes\n"); - return 0; + return -EINVAL; } } virq = irq_domain_alloc_descs(-1, nr_irqs, 0, NUMA_NO_NODE); if (virq <= 0) { pr_warn("Can't reserve IPI, failed to alloc descs\n"); - return 0; + return -ENOMEM; } virq = __irq_domain_alloc_irqs(domain, virq, nr_irqs, NUMA_NO_NODE, @@ -94,22 +94,26 @@ unsigned int irq_reserve_ipi(struct irq_domain *domain, data = irq_get_irq_data(virq + i); cpumask_copy(data->common->affinity, dest); data->common->ipi_offset = offset; + irq_set_status_flags(virq + i, IRQ_NO_BALANCING); } return virq; free_descs: irq_free_descs(virq, nr_irqs); - return 0; + return -EBUSY; } /** * irq_destroy_ipi() - unreserve an IPI that was previously allocated * @irq: linux irq number to be destroyed + * @dest: cpumask of cpus which should have the IPI removed * - * Return the IPIs allocated with irq_reserve_ipi() to the system destroying - * all virqs associated with them. + * The IPIs allocated with irq_reserve_ipi() are retuerned to the system + * destroying all virqs associated with them. + * + * Return 0 on success or error code on failure. */ -void irq_destroy_ipi(unsigned int irq) +int irq_destroy_ipi(unsigned int irq, const struct cpumask *dest) { struct irq_data *data = irq_get_irq_data(irq); struct cpumask *ipimask = data ? irq_data_get_affinity_mask(data) : NULL; @@ -117,7 +121,7 @@ void irq_destroy_ipi(unsigned int irq) unsigned int nr_irqs; if (!irq || !data || !ipimask) - return; + return -EINVAL; domain = data->domain; if (WARN_ON(domain == NULL)) @@ -125,15 +129,25 @@ void irq_destroy_ipi(unsigned int irq) if (!irq_domain_is_ipi(domain)) { pr_warn("Trying to destroy a non IPI domain!\n"); - return; + return -EINVAL; } - if (irq_domain_is_ipi_per_cpu(domain)) - nr_irqs = cpumask_weight(ipimask); - else + if (WARN_ON(!cpumask_subset(dest, ipimask))) + /* + * Must be destroying a subset of CPUs to which this IPI + * was set up to target + */ + return -EINVAL; + + if (irq_domain_is_ipi_per_cpu(domain)) { + irq = irq + cpumask_first(dest) - data->common->ipi_offset; + nr_irqs = cpumask_weight(dest); + } else { nr_irqs = 1; + } irq_domain_free_irqs(irq, nr_irqs); + return 0; } /** diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c index 0ccd028..8731e1c 100644 --- a/kernel/irq/irqdesc.c +++ b/kernel/irq/irqdesc.c @@ -595,7 +595,8 @@ void __irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags, bool bus) chip_bus_sync_unlock(desc); } -int irq_set_percpu_devid(unsigned int irq) +int irq_set_percpu_devid_partition(unsigned int irq, + const struct cpumask *affinity) { struct irq_desc *desc = irq_to_desc(irq); @@ -610,10 +611,33 @@ int irq_set_percpu_devid(unsigned int irq) if (!desc->percpu_enabled) return -ENOMEM; + if (affinity) + desc->percpu_affinity = affinity; + else + desc->percpu_affinity = cpu_possible_mask; + irq_set_percpu_devid_flags(irq); return 0; } +int irq_set_percpu_devid(unsigned int irq) +{ + return irq_set_percpu_devid_partition(irq, NULL); +} + +int irq_get_percpu_devid_partition(unsigned int irq, struct cpumask *affinity) +{ + struct irq_desc *desc = irq_to_desc(irq); + + if (!desc || !desc->percpu_enabled) + return -EINVAL; + + if (affinity) + cpumask_copy(affinity, desc->percpu_affinity); + + return 0; +} + void kstat_incr_irq_this_cpu(unsigned int irq) { kstat_incr_irqs_this_cpu(irq_to_desc(irq)); diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c index 245a485..d65f6f3 100644 --- a/kernel/irq/irqdomain.c +++ b/kernel/irq/irqdomain.c @@ -243,14 +243,15 @@ struct irq_domain *irq_domain_add_legacy(struct device_node *of_node, EXPORT_SYMBOL_GPL(irq_domain_add_legacy); /** - * irq_find_matching_fwnode() - Locates a domain for a given fwnode - * @fwnode: FW descriptor of the interrupt controller + * irq_find_matching_fwspec() - Locates a domain for a given fwspec + * @fwspec: FW specifier for an interrupt * @bus_token: domain-specific data */ -struct irq_domain *irq_find_matching_fwnode(struct fwnode_handle *fwnode, +struct irq_domain *irq_find_matching_fwspec(struct irq_fwspec *fwspec, enum irq_domain_bus_token bus_token) { struct irq_domain *h, *found = NULL; + struct fwnode_handle *fwnode = fwspec->fwnode; int rc; /* We might want to match the legacy controller last since @@ -264,7 +265,9 @@ struct irq_domain *irq_find_matching_fwnode(struct fwnode_handle *fwnode, */ mutex_lock(&irq_domain_mutex); list_for_each_entry(h, &irq_domain_list, link) { - if (h->ops->match) + if (h->ops->select && fwspec->param_count) + rc = h->ops->select(h, fwspec, bus_token); + else if (h->ops->match) rc = h->ops->match(h, to_of_node(fwnode), bus_token); else rc = ((fwnode != NULL) && (h->fwnode == fwnode) && @@ -279,7 +282,7 @@ struct irq_domain *irq_find_matching_fwnode(struct fwnode_handle *fwnode, mutex_unlock(&irq_domain_mutex); return found; } -EXPORT_SYMBOL_GPL(irq_find_matching_fwnode); +EXPORT_SYMBOL_GPL(irq_find_matching_fwspec); /** * irq_set_default_host() - Set a "default" irq domain @@ -574,11 +577,9 @@ unsigned int irq_create_fwspec_mapping(struct irq_fwspec *fwspec) int virq; if (fwspec->fwnode) { - domain = irq_find_matching_fwnode(fwspec->fwnode, - DOMAIN_BUS_WIRED); + domain = irq_find_matching_fwspec(fwspec, DOMAIN_BUS_WIRED); if (!domain) - domain = irq_find_matching_fwnode(fwspec->fwnode, - DOMAIN_BUS_ANY); + domain = irq_find_matching_fwspec(fwspec, DOMAIN_BUS_ANY); } else { domain = irq_default_domain; } diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index cc1cc64..ef0bc02 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -1407,7 +1407,7 @@ int setup_irq(unsigned int irq, struct irqaction *act) int retval; struct irq_desc *desc = irq_to_desc(irq); - if (WARN_ON(irq_settings_is_per_cpu_devid(desc))) + if (!desc || WARN_ON(irq_settings_is_per_cpu_devid(desc))) return -EINVAL; chip_bus_lock(desc); retval = __setup_irq(irq, desc, act); |