diff options
Diffstat (limited to 'kernel/irq')
| -rw-r--r-- | kernel/irq/devres.c | 65 | ||||
| -rw-r--r-- | kernel/irq/irqdomain.c | 39 | ||||
| -rw-r--r-- | kernel/irq/manage.c | 4 | ||||
| -rw-r--r-- | kernel/irq/msi.c | 4 | ||||
| -rw-r--r-- | kernel/irq/proc.c | 2 | ||||
| -rw-r--r-- | kernel/irq/spurious.c | 4 |
6 files changed, 112 insertions, 6 deletions
diff --git a/kernel/irq/devres.c b/kernel/irq/devres.c index 74d90a754268..1613bfd48365 100644 --- a/kernel/irq/devres.c +++ b/kernel/irq/devres.c @@ -2,6 +2,7 @@ #include <linux/interrupt.h> #include <linux/device.h> #include <linux/gfp.h> +#include <linux/irq.h> /* * Device resource management aware IRQ request/free implementation. @@ -33,7 +34,7 @@ static int devm_irq_match(struct device *dev, void *res, void *data) * @thread_fn: function to be called in a threaded interrupt context. NULL * for devices which handle everything in @handler * @irqflags: Interrupt type flags - * @devname: An ascii name for the claiming device + * @devname: An ascii name for the claiming device, dev_name(dev) if NULL * @dev_id: A cookie passed back to the handler function * * Except for the extra @dev argument, this function takes the @@ -57,6 +58,9 @@ int devm_request_threaded_irq(struct device *dev, unsigned int irq, if (!dr) return -ENOMEM; + if (!devname) + devname = dev_name(dev); + rc = request_threaded_irq(irq, handler, thread_fn, irqflags, devname, dev_id); if (rc) { @@ -80,7 +84,7 @@ EXPORT_SYMBOL(devm_request_threaded_irq); * @thread_fn: function to be called in a threaded interrupt context. NULL * for devices which handle everything in @handler * @irqflags: Interrupt type flags - * @devname: An ascii name for the claiming device + * @devname: An ascii name for the claiming device, dev_name(dev) if NULL * @dev_id: A cookie passed back to the handler function * * Except for the extra @dev argument, this function takes the @@ -103,6 +107,9 @@ int devm_request_any_context_irq(struct device *dev, unsigned int irq, if (!dr) return -ENOMEM; + if (!devname) + devname = dev_name(dev); + rc = request_any_context_irq(irq, handler, irqflags, devname, dev_id); if (rc < 0) { devres_free(dr); @@ -137,3 +144,57 @@ void devm_free_irq(struct device *dev, unsigned int irq, void *dev_id) free_irq(irq, dev_id); } EXPORT_SYMBOL(devm_free_irq); + +struct irq_desc_devres { + unsigned int from; + unsigned int cnt; +}; + +static void devm_irq_desc_release(struct device *dev, void *res) +{ + struct irq_desc_devres *this = res; + + irq_free_descs(this->from, this->cnt); +} + +/** + * __devm_irq_alloc_descs - Allocate and initialize a range of irq descriptors + * for a managed device + * @dev: Device to allocate the descriptors for + * @irq: Allocate for specific irq number if irq >= 0 + * @from: Start the search from this irq number + * @cnt: Number of consecutive irqs to allocate + * @node: Preferred node on which the irq descriptor should be allocated + * @owner: Owning module (can be NULL) + * @affinity: Optional pointer to an affinity mask array of size @cnt + * which hints where the irq descriptors should be allocated + * and which default affinities to use + * + * Returns the first irq number or error code. + * + * Note: Use the provided wrappers (devm_irq_alloc_desc*) for simplicity. + */ +int __devm_irq_alloc_descs(struct device *dev, int irq, unsigned int from, + unsigned int cnt, int node, struct module *owner, + const struct cpumask *affinity) +{ + struct irq_desc_devres *dr; + int base; + + dr = devres_alloc(devm_irq_desc_release, sizeof(*dr), GFP_KERNEL); + if (!dr) + return -ENOMEM; + + base = __irq_alloc_descs(irq, from, cnt, node, owner, affinity); + if (base < 0) { + devres_free(dr); + return base; + } + + dr->from = base; + dr->cnt = cnt; + devres_add(dev, dr); + + return base; +} +EXPORT_SYMBOL_GPL(__devm_irq_alloc_descs); diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c index b59e6768c5e9..31805f237396 100644 --- a/kernel/irq/irqdomain.c +++ b/kernel/irq/irqdomain.c @@ -278,6 +278,31 @@ struct irq_domain *irq_find_matching_fwspec(struct irq_fwspec *fwspec, EXPORT_SYMBOL_GPL(irq_find_matching_fwspec); /** + * irq_domain_check_msi_remap - Check whether all MSI irq domains implement + * IRQ remapping + * + * Return: false if any MSI irq domain does not support IRQ remapping, + * true otherwise (including if there is no MSI irq domain) + */ +bool irq_domain_check_msi_remap(void) +{ + struct irq_domain *h; + bool ret = true; + + mutex_lock(&irq_domain_mutex); + list_for_each_entry(h, &irq_domain_list, link) { + if (irq_domain_is_msi(h) && + !irq_domain_hierarchical_is_msi_remap(h)) { + ret = false; + break; + } + } + mutex_unlock(&irq_domain_mutex); + return ret; +} +EXPORT_SYMBOL_GPL(irq_domain_check_msi_remap); + +/** * irq_set_default_host() - Set a "default" irq domain * @domain: default domain pointer * @@ -1408,6 +1433,20 @@ static void irq_domain_check_hierarchy(struct irq_domain *domain) if (domain->ops->alloc) domain->flags |= IRQ_DOMAIN_FLAG_HIERARCHY; } + +/** + * irq_domain_hierarchical_is_msi_remap - Check if the domain or any + * parent has MSI remapping support + * @domain: domain pointer + */ +bool irq_domain_hierarchical_is_msi_remap(struct irq_domain *domain) +{ + for (; domain; domain = domain->parent) { + if (irq_domain_is_msi_remap(domain)) + return true; + } + return false; +} #else /* CONFIG_IRQ_DOMAIN_HIERARCHY */ /** * irq_domain_get_irq_data - Get irq_data associated with @virq and @domain diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index 6b669593e7eb..a4afe5cc5af1 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -17,6 +17,8 @@ #include <linux/slab.h> #include <linux/sched.h> #include <linux/sched/rt.h> +#include <linux/sched/task.h> +#include <uapi/linux/sched/types.h> #include <linux/task_work.h> #include "internals.h" @@ -353,7 +355,7 @@ static int setup_affinity(struct irq_desc *desc, struct cpumask *mask) return 0; /* - * Preserve the managed affinity setting and an userspace affinity + * Preserve the managed affinity setting and a userspace affinity * setup, but make sure that one of the targets is online. */ if (irqd_affinity_is_managed(&desc->irq_data) || diff --git a/kernel/irq/msi.c b/kernel/irq/msi.c index ee230063f033..ddc2f5427f75 100644 --- a/kernel/irq/msi.c +++ b/kernel/irq/msi.c @@ -270,8 +270,8 @@ struct irq_domain *msi_create_irq_domain(struct fwnode_handle *fwnode, if (info->flags & MSI_FLAG_USE_DEF_CHIP_OPS) msi_domain_update_chip_ops(info); - return irq_domain_create_hierarchy(parent, 0, 0, fwnode, - &msi_domain_ops, info); + return irq_domain_create_hierarchy(parent, IRQ_DOMAIN_FLAG_MSI, 0, + fwnode, &msi_domain_ops, info); } int msi_domain_prepare_irqs(struct irq_domain *domain, struct device *dev, diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c index feaa813b84a9..c53edad7b459 100644 --- a/kernel/irq/proc.c +++ b/kernel/irq/proc.c @@ -487,6 +487,8 @@ int show_interrupts(struct seq_file *p, void *v) } if (desc->irq_data.domain) seq_printf(p, " %*d", prec, (int) desc->irq_data.hwirq); + else + seq_printf(p, " %*s", prec, ""); #ifdef CONFIG_GENERIC_IRQ_SHOW_LEVEL seq_printf(p, " %-8s", irqd_is_level_type(&desc->irq_data) ? "Level" : "Edge"); #endif diff --git a/kernel/irq/spurious.c b/kernel/irq/spurious.c index 5707f97a3e6a..061ba7eed4ed 100644 --- a/kernel/irq/spurious.c +++ b/kernel/irq/spurious.c @@ -175,7 +175,9 @@ out: static inline int bad_action_ret(irqreturn_t action_ret) { - if (likely(action_ret <= (IRQ_HANDLED | IRQ_WAKE_THREAD))) + unsigned int r = action_ret; + + if (likely(r <= (IRQ_HANDLED | IRQ_WAKE_THREAD))) return 0; return 1; } |