Something went wrong. Try again.
Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Something went wrong. Try again.
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372// SPDX-License-Identifier: GPL-2.0#include <linux/module.h>#include <linux/interrupt.h>#include <linux/irqdomain.h>#include <linux/device.h>#include <linux/gfp.h>#include <linux/irq.h>
#include "internals.h"
/* * Device resource management aware IRQ request/free implementation. */struct irq_devres { unsigned int irq; void *dev_id;};
static void devm_irq_release(struct device *dev, void *res){ struct irq_devres *this = res;
free_irq(this->irq, this->dev_id);}
static int devm_irq_match(struct device *dev, void *res, void *data){ struct irq_devres *this = res, *match = data;
return this->irq == match->irq && this->dev_id == match->dev_id;}
static int devm_request_result(struct device *dev, int rc, unsigned int irq, irq_handler_t handler, irq_handler_t thread_fn, const char *devname){ if (rc >= 0) return rc;
return dev_err_probe(dev, rc, "request_irq(%u) %ps %ps %s\n", irq, handler, thread_fn, devname ? : "");}
static int __devm_request_threaded_irq(struct device *dev, unsigned int irq, irq_handler_t handler, irq_handler_t thread_fn, unsigned long irqflags, const char *devname, void *dev_id){ struct irq_devres *dr; int rc;
dr = devres_alloc(devm_irq_release, sizeof(struct irq_devres), GFP_KERNEL); if (!dr) return -ENOMEM;
if (!devname) devname = dev_name(dev);
rc = request_threaded_irq(irq, handler, thread_fn, irqflags, devname, dev_id); if (rc) { devres_free(dr); return rc; }
dr->irq = irq; dr->dev_id = dev_id; devres_add(dev, dr);
return 0;}
/** * devm_request_threaded_irq - allocate an interrupt line for a managed device with error logging * @dev: Device to request interrupt for * @irq: Interrupt line to allocate * @handler: Function to be called when the interrupt occurs * @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, 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 same * arguments and performs the same function as request_threaded_irq(). * Interrupts requested with this function will be automatically freed on * driver detach. * * If an interrupt allocated with this function needs to be freed * separately, devm_free_irq() must be used. * * When the request fails, an error message is printed with contextual * information (device name, interrupt number, handler functions and * error code). Don't add extra error messages at the call sites. * * Return: 0 on success or a negative error number. */int devm_request_threaded_irq(struct device *dev, unsigned int irq, irq_handler_t handler, irq_handler_t thread_fn, unsigned long irqflags, const char *devname, void *dev_id){ int rc = __devm_request_threaded_irq(dev, irq, handler, thread_fn, irqflags, devname, dev_id);
return devm_request_result(dev, rc, irq, handler, thread_fn, devname);}EXPORT_SYMBOL(devm_request_threaded_irq);
static int __devm_request_any_context_irq(struct device *dev, unsigned int irq, irq_handler_t handler, unsigned long irqflags, const char *devname, void *dev_id){ struct irq_devres *dr; int rc;
dr = devres_alloc(devm_irq_release, sizeof(struct irq_devres), GFP_KERNEL); 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); return rc; }
dr->irq = irq; dr->dev_id = dev_id; devres_add(dev, dr);
return rc;}
/** * devm_request_any_context_irq - allocate an interrupt line for a managed device with error logging * @dev: Device to request interrupt for * @irq: Interrupt line to allocate * @handler: Function to be called when the interrupt occurs * @irqflags: Interrupt type flags * @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 same * arguments and performs the same function as request_any_context_irq(). * Interrupts requested with this function will be automatically freed on * driver detach. * * If an interrupt allocated with this function needs to be freed * separately, devm_free_irq() must be used. * * When the request fails, an error message is printed with contextual * information (device name, interrupt number, handler functions and * error code). Don't add extra error messages at the call sites. * * Return: IRQC_IS_HARDIRQ or IRQC_IS_NESTED on success, or a negative error * number. */int devm_request_any_context_irq(struct device *dev, unsigned int irq, irq_handler_t handler, unsigned long irqflags, const char *devname, void *dev_id){ int rc = __devm_request_any_context_irq(dev, irq, handler, irqflags, devname, dev_id);
return devm_request_result(dev, rc, irq, handler, NULL, devname);}EXPORT_SYMBOL(devm_request_any_context_irq);
/** * devm_free_irq - free an interrupt * @dev: device to free interrupt for * @irq: Interrupt line to free * @dev_id: Device identity to free * * Except for the extra @dev argument, this function takes the * same arguments and performs the same function as free_irq(). * This function instead of free_irq() should be used to manually * free IRQs allocated with devm_request_irq(). */void devm_free_irq(struct device *dev, unsigned int irq, void *dev_id){ struct irq_devres match_data = { irq, dev_id };
WARN_ON(devres_release(dev, devm_irq_release, devm_irq_match, &match_data));}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 irq_affinity_desc 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 irq_affinity_desc *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);
#ifdef CONFIG_GENERIC_IRQ_CHIP/** * devm_irq_alloc_generic_chip - Allocate and initialize a generic chip * for a managed device * @dev: Device to allocate the generic chip for * @name: Name of the irq chip * @num_ct: Number of irq_chip_type instances associated with this * @irq_base: Interrupt base nr for this chip * @reg_base: Register base address (virtual) * @handler: Default flow handler associated with this chip * * Returns an initialized irq_chip_generic structure. The chip defaults * to the primary (index 0) irq_chip_type and @handler */struct irq_chip_generic *devm_irq_alloc_generic_chip(struct device *dev, const char *name, int num_ct, unsigned int irq_base, void __iomem *reg_base, irq_flow_handler_t handler){ struct irq_chip_generic *gc;
gc = devm_kzalloc(dev, struct_size(gc, chip_types, num_ct), GFP_KERNEL); if (gc) irq_init_generic_chip(gc, name, num_ct, irq_base, reg_base, handler);
return gc;}EXPORT_SYMBOL_GPL(devm_irq_alloc_generic_chip);
struct irq_generic_chip_devres { struct irq_chip_generic *gc; u32 msk; unsigned int clr; unsigned int set;};
static void devm_irq_remove_generic_chip(struct device *dev, void *res){ struct irq_generic_chip_devres *this = res;
irq_remove_generic_chip(this->gc, this->msk, this->clr, this->set);}
/** * devm_irq_setup_generic_chip - Setup a range of interrupts with a generic * chip for a managed device * * @dev: Device to setup the generic chip for * @gc: Generic irq chip holding all data * @msk: Bitmask holding the irqs to initialize relative to gc->irq_base * @flags: Flags for initialization * @clr: IRQ_* bits to clear * @set: IRQ_* bits to set * * Set up max. 32 interrupts starting from gc->irq_base. Note, this * initializes all interrupts to the primary irq_chip_type and its * associated handler. */int devm_irq_setup_generic_chip(struct device *dev, struct irq_chip_generic *gc, u32 msk, enum irq_gc_flags flags, unsigned int clr, unsigned int set){ struct irq_generic_chip_devres *dr;
dr = devres_alloc(devm_irq_remove_generic_chip, sizeof(*dr), GFP_KERNEL); if (!dr) return -ENOMEM;
irq_setup_generic_chip(gc, msk, flags, clr, set);
dr->gc = gc; dr->msk = msk; dr->clr = clr; dr->set = set; devres_add(dev, dr);
return 0;}EXPORT_SYMBOL_GPL(devm_irq_setup_generic_chip);#endif /* CONFIG_GENERIC_IRQ_CHIP */
#ifdef CONFIG_IRQ_DOMAINstatic void devm_irq_domain_remove(struct device *dev, void *res){ struct irq_domain **domain = res;
irq_domain_remove(*domain);}
/** * devm_irq_domain_instantiate() - Instantiate a new irq domain data for a * managed device. * @dev: Device to instantiate the domain for * @info: Domain information pointer pointing to the information for this * domain * * Return: A pointer to the instantiated irq domain or an ERR_PTR value. */struct irq_domain *devm_irq_domain_instantiate(struct device *dev, const struct irq_domain_info *info){ struct irq_domain *domain; struct irq_domain **dr;
dr = devres_alloc(devm_irq_domain_remove, sizeof(*dr), GFP_KERNEL); if (!dr) return ERR_PTR(-ENOMEM);
domain = irq_domain_instantiate(info); if (!IS_ERR(domain)) { *dr = domain; devres_add(dev, dr); } else { devres_free(dr); }
return domain;}EXPORT_SYMBOL_GPL(devm_irq_domain_instantiate);#endif /* CONFIG_IRQ_DOMAIN */