diff options
Diffstat (limited to 'include/linux/irqdomain.h')
| -rw-r--r-- | include/linux/irqdomain.h | 855 |
1 files changed, 703 insertions, 152 deletions
diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h index c983ed18c332..952d3c8dd6b7 100644 --- a/include/linux/irqdomain.h +++ b/include/linux/irqdomain.h @@ -1,56 +1,95 @@ +/* SPDX-License-Identifier: GPL-2.0 */ /* - * irq_domain - IRQ translation domains - * - * Translation infrastructure between hw and linux irq numbers. This is - * helpful for interrupt controllers to implement mapping between hardware - * irq numbers and the Linux irq number space. - * - * irq_domains also have a hook for translating device tree interrupt - * representation into a hardware irq number that can be mapped back to a - * Linux irq number without any extra platform support code. - * - * Interrupt controller "domain" data structure. This could be defined as a - * irq domain controller. That is, it handles the mapping between hardware - * and virtual interrupt numbers for a given interrupt domain. The domain - * structure is generally created by the PIC code for a given PIC instance - * (though a domain can cover more than one PIC if they have a flat number - * model). It's the domain callbacks that are responsible for setting the - * irq_chip on a given irq_desc after it's been mapped. - * - * The host code and data structures are agnostic to whether or not - * we use an open firmware device-tree. We do have references to struct - * device_node in two places: in irq_find_host() to find the host matching - * a given interrupt controller node, and of course as an argument to its - * counterpart domain->ops->match() callback. However, those are treated as - * generic pointers by the core and the fact that it's actually a device-node - * pointer is purely a convention between callers and implementation. This - * code could thus be used on other architectures by replacing those two - * by some sort of arch-specific void * "token" used to identify interrupt - * controllers. + * irq_domain - IRQ Translation Domains + * + * See Documentation/core-api/irq/irq-domain.rst for the details. */ #ifndef _LINUX_IRQDOMAIN_H #define _LINUX_IRQDOMAIN_H #include <linux/types.h> +#include <linux/irqdomain_defs.h> +#include <linux/irqhandler.h> +#include <linux/of.h> +#include <linux/mutex.h> #include <linux/radix-tree.h> struct device_node; +struct fwnode_handle; struct irq_domain; -struct of_device_id; +struct irq_chip; +struct irq_data; +struct irq_desc; +struct cpumask; +struct seq_file; +struct irq_affinity_desc; +struct msi_parent_ops; + +#define IRQ_DOMAIN_IRQ_SPEC_PARAMS 16 + +/** + * struct irq_fwspec - generic IRQ specifier structure + * + * @fwnode: Pointer to a firmware-specific descriptor + * @param_count: Number of device-specific parameters + * @param: Device-specific parameters + * + * This structure, directly modeled after of_phandle_args, is used to + * pass a device-specific description of an interrupt. + */ +struct irq_fwspec { + struct fwnode_handle *fwnode; + int param_count; + u32 param[IRQ_DOMAIN_IRQ_SPEC_PARAMS]; +}; + +/** + * struct irq_fwspec_info - firmware provided IRQ information structure + * + * @flags: Information validity flags + * @affinity: Affinity mask for this interrupt + * + * This structure reports firmware-specific information about an + * interrupt. The only significant information is the affinity of a + * per-CPU interrupt, but this is designed to be extended as required. + */ +struct irq_fwspec_info { + unsigned long flags; + const struct cpumask *affinity; +}; + +#define IRQ_FWSPEC_INFO_AFFINITY_VALID BIT(0) -/* Number of irqs reserved for a legacy isa controller */ -#define NUM_ISA_INTERRUPTS 16 +/* Conversion function from of_phandle_args fields to fwspec */ +void of_phandle_args_to_fwspec(struct device_node *np, const u32 *args, + unsigned int count, struct irq_fwspec *fwspec); /** * struct irq_domain_ops - Methods for irq_domain objects - * @match: Match an interrupt controller device node to a host, returns - * 1 on a match - * @map: Create or update a mapping between a virtual irq number and a hw - * irq number. This is called only once for a given mapping. - * @unmap: Dispose of such a mapping - * @xlate: Given a device tree node and interrupt specifier, decode - * the hardware irq number and linux irq type value. + * @match: Match an interrupt controller device node to a domain, returns + * 1 on a match + * @select: Match an interrupt controller fw specification. It is more generic + * than @match as it receives a complete struct irq_fwspec. Therefore, + * @select is preferred if provided. Returns 1 on a match. + * @map: Create or update a mapping between a virtual irq number and a hw + * irq number. This is called only once for a given mapping. + * @unmap: Dispose of such a mapping + * @xlate: Given a device tree node and interrupt specifier, decode + * the hardware irq number and linux irq type value. + * @alloc: Allocate @nr_irqs interrupts starting from @virq. + * @free: Free @nr_irqs interrupts starting from @virq. + * @activate: Activate one interrupt in HW (@irqd). If @reserve is set, only + * reserve the vector. If unset, assign the vector (called from + * request_irq()). + * @deactivate: Disarm one interrupt (@irqd). + * @translate: Given @fwspec, decode the hardware irq number (@out_hwirq) and + * linux irq type value (@out_type). This is a generalised @xlate + * (over struct irq_fwspec) and is preferred if provided. + * @get_fwspec_info: + * Given @fwspec, report additional firmware-provided information in + * @info. Optional. + * @debug_show: For domains to show specific data for an interrupt in debugfs. * * Functions below are provided by the driver and called whenever a new mapping * is created or an old mapping is disposed. The driver can then proceed to @@ -58,168 +97,680 @@ struct of_device_id; * to setup the irq_desc when returning from map(). */ struct irq_domain_ops { - int (*match)(struct irq_domain *d, struct device_node *node); - int (*map)(struct irq_domain *d, unsigned int virq, irq_hw_number_t hw); - void (*unmap)(struct irq_domain *d, unsigned int virq); - int (*xlate)(struct irq_domain *d, struct device_node *node, - const u32 *intspec, unsigned int intsize, - unsigned long *out_hwirq, unsigned int *out_type); + int (*match)(struct irq_domain *d, struct device_node *node, + enum irq_domain_bus_token bus_token); + int (*select)(struct irq_domain *d, struct irq_fwspec *fwspec, + enum irq_domain_bus_token bus_token); + int (*map)(struct irq_domain *d, unsigned int virq, irq_hw_number_t hw); + void (*unmap)(struct irq_domain *d, unsigned int virq); + int (*xlate)(struct irq_domain *d, struct device_node *node, + const u32 *intspec, unsigned int intsize, + unsigned long *out_hwirq, unsigned int *out_type); +#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY + /* extended V2 interfaces to support hierarchy irq_domains */ + int (*alloc)(struct irq_domain *d, unsigned int virq, + unsigned int nr_irqs, void *arg); + void (*free)(struct irq_domain *d, unsigned int virq, + unsigned int nr_irqs); + int (*activate)(struct irq_domain *d, struct irq_data *irqd, bool reserve); + void (*deactivate)(struct irq_domain *d, struct irq_data *irq_data); + int (*translate)(struct irq_domain *d, struct irq_fwspec *fwspec, + unsigned long *out_hwirq, unsigned int *out_type); + int (*get_fwspec_info)(struct irq_fwspec *fwspec, struct irq_fwspec_info *info); +#endif +#ifdef CONFIG_GENERIC_IRQ_DEBUGFS + void (*debug_show)(struct seq_file *m, struct irq_domain *d, + struct irq_data *irqd, int ind); +#endif }; -extern struct irq_domain_ops irq_generic_chip_ops; +extern const struct irq_domain_ops irq_generic_chip_ops; struct irq_domain_chip_generic; /** * struct irq_domain - Hardware interrupt number translation object - * @link: Element in global irq_domain list. - * @name: Name of interrupt domain - * @ops: pointer to irq_domain methods - * @host_data: private data pointer for use by owner. Not touched by irq_domain - * core code. - * - * Optional elements - * @of_node: Pointer to device tree nodes associated with the irq_domain. Used - * when decoding device tree interrupt specifiers. - * @gc: Pointer to a list of generic chips. There is a helper function for - * setting up one or more generic chips for interrupt controllers - * drivers using the generic chip library which uses this pointer. - * - * Revmap data, used internally by irq_domain - * @revmap_direct_max_irq: The largest hwirq that can be set for controllers that - * support direct mapping - * @revmap_size: Size of the linear map table @linear_revmap[] - * @revmap_tree: Radix map tree for hwirqs that don't fit in the linear map - * @linear_revmap: Linear table of hwirq->virq reverse mappings + * @link: Element in global irq_domain list. + * @name: Name of interrupt domain + * @ops: Pointer to irq_domain methods + * @host_data: Private data pointer for use by owner. Not touched by irq_domain + * core code. + * @flags: Per irq_domain flags + * @mapcount: The number of mapped interrupts + * @mutex: Domain lock, hierarchical domains use root domain's lock + * @root: Pointer to root domain, or containing structure if non-hierarchical + * + * Optional elements: + * @fwnode: Pointer to firmware node associated with the irq_domain. Pretty easy + * to swap it for the of_node via the irq_domain_get_of_node accessor + * @bus_token: @fwnode's device_node might be used for several irq domains. But + * in connection with @bus_token, the pair shall be unique in a + * system. + * @gc: Pointer to a list of generic chips. There is a helper function for + * setting up one or more generic chips for interrupt controllers + * drivers using the generic chip library which uses this pointer. + * @dev: Pointer to the device which instantiated the irqdomain + * With per device irq domains this is not necessarily the same + * as @pm_dev. + * @pm_dev: Pointer to a device that can be utilized for power management + * purposes related to the irq domain. + * @parent: Pointer to parent irq_domain to support hierarchy irq_domains + * @msi_parent_ops: Pointer to MSI parent domain methods for per device domain init + * @exit: Function called when the domain is destroyed + * + * Revmap data, used internally by the irq domain code: + * @hwirq_max: Top limit for the HW irq number. Especially to avoid + * conflicts/failures with reserved HW irqs. Can be ~0. + * @revmap_size: Size of the linear map table @revmap + * @revmap_tree: Radix map tree for hwirqs that don't fit in the linear map + * @revmap: Linear table of irq_data pointers */ struct irq_domain { - struct list_head link; - const char *name; - const struct irq_domain_ops *ops; - void *host_data; + struct list_head link; + const char *name; + const struct irq_domain_ops *ops; + void *host_data; + unsigned int flags; + unsigned int mapcount; + struct mutex mutex; + struct irq_domain *root; /* Optional data */ - struct device_node *of_node; - struct irq_domain_chip_generic *gc; + struct fwnode_handle *fwnode; + enum irq_domain_bus_token bus_token; + struct irq_domain_chip_generic *gc; + struct device *dev; + struct device *pm_dev; +#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY + struct irq_domain *parent; +#endif +#ifdef CONFIG_GENERIC_MSI_IRQ + const struct msi_parent_ops *msi_parent_ops; +#endif + void (*exit)(struct irq_domain *d); /* reverse map data. The linear map gets appended to the irq_domain */ - irq_hw_number_t hwirq_max; - unsigned int revmap_direct_max_irq; - unsigned int revmap_size; - struct radix_tree_root revmap_tree; - unsigned int linear_revmap[]; + irq_hw_number_t hwirq_max; + unsigned int revmap_size; + struct radix_tree_root revmap_tree; + struct irq_data __rcu *revmap[] __counted_by(revmap_size); }; +/* Irq domain flags */ +enum { + /* Irq domain is hierarchical */ + IRQ_DOMAIN_FLAG_HIERARCHY = (1 << 0), + + /* Irq domain name was allocated internally */ + IRQ_DOMAIN_NAME_ALLOCATED = (1 << 1), + + /* Irq domain is an IPI domain with virq per cpu */ + IRQ_DOMAIN_FLAG_IPI_PER_CPU = (1 << 2), + + /* Irq domain is an IPI domain with single virq */ + IRQ_DOMAIN_FLAG_IPI_SINGLE = (1 << 3), + + /* Irq domain implements MSIs */ + IRQ_DOMAIN_FLAG_MSI = (1 << 4), + + /* + * Irq domain implements isolated MSI, see msi_device_has_isolated_msi() + */ + IRQ_DOMAIN_FLAG_ISOLATED_MSI = (1 << 5), + + /* Irq domain doesn't translate anything */ + IRQ_DOMAIN_FLAG_NO_MAP = (1 << 6), + + /* Irq domain is a MSI parent domain */ + IRQ_DOMAIN_FLAG_MSI_PARENT = (1 << 8), + + /* Irq domain is a MSI device domain */ + IRQ_DOMAIN_FLAG_MSI_DEVICE = (1 << 9), + + /* Irq domain must destroy generic chips when removed */ + IRQ_DOMAIN_FLAG_DESTROY_GC = (1 << 10), + + /* Address and data pair is mutable when irq_set_affinity() */ + IRQ_DOMAIN_FLAG_MSI_IMMUTABLE = (1 << 11), + + /* IRQ domain requires parent fwnode matching */ + IRQ_DOMAIN_FLAG_FWNODE_PARENT = (1 << 12), + + /* + * Flags starting from IRQ_DOMAIN_FLAG_NONCORE are reserved + * for implementation specific purposes and ignored by the + * core code. + */ + IRQ_DOMAIN_FLAG_NONCORE = (1 << 16), +}; + +static inline struct device_node *irq_domain_get_of_node(struct irq_domain *d) +{ + return to_of_node(d->fwnode); +} + +static inline void irq_domain_set_pm_device(struct irq_domain *d, struct device *dev) +{ + if (d) + d->pm_dev = dev; +} + #ifdef CONFIG_IRQ_DOMAIN -struct irq_domain *__irq_domain_add(struct device_node *of_node, int size, - irq_hw_number_t hwirq_max, int direct_max, - const struct irq_domain_ops *ops, - void *host_data); -struct irq_domain *irq_domain_add_simple(struct device_node *of_node, - unsigned int size, - unsigned int first_irq, - const struct irq_domain_ops *ops, - void *host_data); -struct irq_domain *irq_domain_add_legacy(struct device_node *of_node, - unsigned int size, - unsigned int first_irq, - irq_hw_number_t first_hwirq, - const struct irq_domain_ops *ops, - void *host_data); -extern struct irq_domain *irq_find_host(struct device_node *node); -extern void irq_set_default_host(struct irq_domain *host); +struct fwnode_handle *__irq_domain_alloc_fwnode(unsigned int type, int id, + const char *name, phys_addr_t *pa); + +enum { + IRQCHIP_FWNODE_REAL, + IRQCHIP_FWNODE_NAMED, + IRQCHIP_FWNODE_NAMED_ID, +}; + +static inline struct fwnode_handle *irq_domain_alloc_named_fwnode(const char *name) +{ + return __irq_domain_alloc_fwnode(IRQCHIP_FWNODE_NAMED, 0, name, NULL); +} + +static inline struct fwnode_handle *irq_domain_alloc_named_id_fwnode(const char *name, int id) +{ + return __irq_domain_alloc_fwnode(IRQCHIP_FWNODE_NAMED_ID, id, name, + NULL); +} + +static inline struct fwnode_handle *irq_domain_alloc_fwnode(phys_addr_t *pa) +{ + return __irq_domain_alloc_fwnode(IRQCHIP_FWNODE_REAL, 0, NULL, pa); +} + +void irq_domain_free_fwnode(struct fwnode_handle *fwnode); + +DEFINE_FREE(irq_domain_free_fwnode, struct fwnode_handle *, if (_T) irq_domain_free_fwnode(_T)) + +struct irq_domain_chip_generic_info; /** - * irq_domain_add_linear() - Allocate and register a linear revmap irq_domain. - * @of_node: pointer to interrupt controller's device tree node. - * @size: Number of interrupts in the domain. - * @ops: map/unmap domain callbacks - * @host_data: Controller private data pointer + * struct irq_domain_info - Domain information structure + * @fwnode: firmware node for the interrupt controller + * @domain_flags: Additional flags to add to the domain flags + * @size: Size of linear map; 0 for radix mapping only + * @hwirq_max: Maximum number of interrupts supported by controller + * @direct_max: Maximum value of direct maps; + * Use ~0 for no limit; 0 for no direct mapping + * @hwirq_base: The first hardware interrupt number (legacy domains only) + * @virq_base: The first Linux interrupt number for legacy domains to + * immediately associate the interrupts after domain creation + * @bus_token: Domain bus token + * @name_suffix: Optional name suffix to avoid collisions when multiple + * domains are added using same fwnode + * @ops: Domain operation callbacks + * @host_data: Controller private data pointer + * @dev: Device which creates the domain + * @dgc_info: Geneneric chip information structure pointer used to + * create generic chips for the domain if not NULL. + * @init: Function called when the domain is created. + * Allow to do some additional domain initialisation. + * @exit: Function called when the domain is destroyed. + * Allow to do some additional cleanup operation. */ -static inline struct irq_domain *irq_domain_add_linear(struct device_node *of_node, - unsigned int size, - const struct irq_domain_ops *ops, - void *host_data) +struct irq_domain_info { + struct fwnode_handle *fwnode; + unsigned int domain_flags; + unsigned int size; + irq_hw_number_t hwirq_max; + int direct_max; + unsigned int hwirq_base; + unsigned int virq_base; + enum irq_domain_bus_token bus_token; + const char *name_suffix; + const struct irq_domain_ops *ops; + void *host_data; + struct device *dev; +#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY + /** + * @parent: Pointer to the parent irq domain used in a hierarchy domain + */ + struct irq_domain *parent; +#endif + struct irq_domain_chip_generic_info *dgc_info; + int (*init)(struct irq_domain *d); + void (*exit)(struct irq_domain *d); +}; + +struct irq_domain *irq_domain_instantiate(const struct irq_domain_info *info); +struct irq_domain *devm_irq_domain_instantiate(struct device *dev, + const struct irq_domain_info *info); + +struct irq_domain *irq_domain_create_simple(struct fwnode_handle *fwnode, unsigned int size, + unsigned int first_irq, + const struct irq_domain_ops *ops, void *host_data); +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 *irq_find_matching_fwspec(struct irq_fwspec *fwspec, + enum irq_domain_bus_token bus_token); +void irq_set_default_domain(struct irq_domain *domain); +struct irq_domain *irq_get_default_domain(void); +int irq_domain_alloc_descs(int virq, unsigned int nr_irqs, irq_hw_number_t hwirq, int node, + const struct irq_affinity_desc *affinity); + +extern const struct fwnode_operations irqchip_fwnode_ops; + +static inline bool is_fwnode_irqchip(const struct fwnode_handle *fwnode) { - return __irq_domain_add(of_node, size, size, 0, ops, host_data); + return fwnode && fwnode->ops == &irqchip_fwnode_ops; } -static inline struct irq_domain *irq_domain_add_nomap(struct device_node *of_node, - unsigned int max_irq, - const struct irq_domain_ops *ops, - void *host_data) + +void irq_domain_update_bus_token(struct irq_domain *domain, enum irq_domain_bus_token bus_token); + +static inline struct irq_domain *irq_find_matching_fwnode(struct fwnode_handle *fwnode, + enum irq_domain_bus_token bus_token) { - return __irq_domain_add(of_node, 0, max_irq, max_irq, ops, host_data); + struct irq_fwspec fwspec = { + .fwnode = fwnode, + }; + + return irq_find_matching_fwspec(&fwspec, bus_token); } -static inline struct irq_domain *irq_domain_add_legacy_isa( - struct device_node *of_node, - const struct irq_domain_ops *ops, - void *host_data) + +static inline struct irq_domain *irq_find_matching_host(struct device_node *node, + enum irq_domain_bus_token bus_token) { - return irq_domain_add_legacy(of_node, NUM_ISA_INTERRUPTS, 0, 0, ops, - host_data); + return irq_find_matching_fwnode(of_fwnode_handle(node), bus_token); } -static inline struct irq_domain *irq_domain_add_tree(struct device_node *of_node, - const struct irq_domain_ops *ops, - void *host_data) + +static inline struct irq_domain *irq_find_host(struct device_node *node) { - return __irq_domain_add(of_node, 0, ~0, 0, ops, host_data); + struct irq_domain *d; + + d = irq_find_matching_host(node, DOMAIN_BUS_WIRED); + if (!d) + d = irq_find_matching_host(node, DOMAIN_BUS_ANY); + + return d; } -extern void irq_domain_remove(struct irq_domain *host); +#ifdef CONFIG_IRQ_DOMAIN_NOMAP +static inline struct irq_domain *irq_domain_create_nomap(struct fwnode_handle *fwnode, + unsigned int max_irq, + const struct irq_domain_ops *ops, + void *host_data) +{ + const struct irq_domain_info info = { + .fwnode = fwnode, + .hwirq_max = max_irq, + .direct_max = max_irq, + .ops = ops, + .host_data = host_data, + }; + struct irq_domain *d = irq_domain_instantiate(&info); -extern int irq_domain_associate(struct irq_domain *domain, unsigned int irq, - irq_hw_number_t hwirq); -extern void irq_domain_associate_many(struct irq_domain *domain, - unsigned int irq_base, - irq_hw_number_t hwirq_base, int count); + return IS_ERR(d) ? NULL : d; +} -extern unsigned int irq_create_mapping(struct irq_domain *host, - irq_hw_number_t hwirq); -extern void irq_dispose_mapping(unsigned int virq); +unsigned int irq_create_direct_mapping(struct irq_domain *domain); +#endif /** - * irq_linear_revmap() - Find a linux irq from a hw irq number. - * @domain: domain owning this hardware interrupt - * @hwirq: hardware irq number in that domain space - * - * This is a fast path alternative to irq_find_mapping() that can be - * called directly by irq controller code to save a handful of - * instructions. It is always safe to call, but won't find irqs mapped - * using the radix tree. + * irq_domain_create_linear - Allocate and register a linear revmap irq_domain. + * @fwnode: pointer to interrupt controller's FW node. + * @size: Number of interrupts in the domain. + * @ops: map/unmap domain callbacks + * @host_data: Controller private data pointer + * + * Returns: Newly created irq_domain */ -static inline unsigned int irq_linear_revmap(struct irq_domain *domain, - irq_hw_number_t hwirq) +static inline struct irq_domain *irq_domain_create_linear(struct fwnode_handle *fwnode, + unsigned int size, + const struct irq_domain_ops *ops, + void *host_data) { - return hwirq < domain->revmap_size ? domain->linear_revmap[hwirq] : 0; + const struct irq_domain_info info = { + .fwnode = fwnode, + .size = size, + .hwirq_max = size, + .ops = ops, + .host_data = host_data, + }; + struct irq_domain *d = irq_domain_instantiate(&info); + + return IS_ERR(d) ? NULL : d; } -extern unsigned int irq_find_mapping(struct irq_domain *host, - irq_hw_number_t hwirq); -extern unsigned int irq_create_direct_mapping(struct irq_domain *host); -extern int irq_create_strict_mappings(struct irq_domain *domain, - unsigned int irq_base, - irq_hw_number_t hwirq_base, int count); -static inline int irq_create_identity_mapping(struct irq_domain *host, - irq_hw_number_t hwirq) +static inline struct irq_domain *irq_domain_create_tree(struct fwnode_handle *fwnode, + const struct irq_domain_ops *ops, + void *host_data) +{ + const struct irq_domain_info info = { + .fwnode = fwnode, + .hwirq_max = ~0, + .ops = ops, + .host_data = host_data, + }; + struct irq_domain *d = irq_domain_instantiate(&info); + + return IS_ERR(d) ? NULL : d; +} + +void irq_domain_remove(struct irq_domain *domain); + +int irq_domain_associate(struct irq_domain *domain, unsigned int irq, irq_hw_number_t hwirq); +void irq_domain_associate_many(struct irq_domain *domain, unsigned int irq_base, + irq_hw_number_t hwirq_base, int count); + +unsigned int irq_create_mapping_affinity(struct irq_domain *domain, irq_hw_number_t hwirq, + const struct irq_affinity_desc *affinity); +unsigned int irq_create_fwspec_mapping(struct irq_fwspec *fwspec); +void irq_dispose_mapping(unsigned int virq); + +/** + * irq_create_mapping - Map a hardware interrupt into linux irq space + * @domain: domain owning this hardware interrupt or NULL for default domain + * @hwirq: hardware irq number in that domain space + * + * Only one mapping per hardware interrupt is permitted. + * + * If the sense/trigger is to be specified, set_irq_type() should be called + * on the number returned from that call. + * + * Returns: Linux irq number or 0 on error + */ +static inline unsigned int irq_create_mapping(struct irq_domain *domain, irq_hw_number_t hwirq) +{ + return irq_create_mapping_affinity(domain, hwirq, NULL); +} + +struct irq_desc *__irq_resolve_mapping(struct irq_domain *domain, + irq_hw_number_t hwirq, + unsigned int *irq); + +/** + * irq_resolve_mapping - Find a linux irq from a hw irq number. + * @domain: domain owning this hardware interrupt + * @hwirq: hardware irq number in that domain space + * + * Returns: Interrupt descriptor + */ +static inline struct irq_desc *irq_resolve_mapping(struct irq_domain *domain, + irq_hw_number_t hwirq) +{ + return __irq_resolve_mapping(domain, hwirq, NULL); +} + +/** + * irq_find_mapping() - Find a linux irq from a hw irq number. + * @domain: domain owning this hardware interrupt + * @hwirq: hardware irq number in that domain space + * + * Returns: Linux irq number or 0 if not found + */ +static inline unsigned int irq_find_mapping(struct irq_domain *domain, + irq_hw_number_t hwirq) { - return irq_create_strict_mappings(host, hwirq, hwirq, 1); + unsigned int irq; + + if (__irq_resolve_mapping(domain, hwirq, &irq)) + return irq; + + return 0; } extern const struct irq_domain_ops irq_domain_simple_ops; /* stock xlate functions */ int irq_domain_xlate_onecell(struct irq_domain *d, struct device_node *ctrlr, - const u32 *intspec, unsigned int intsize, - irq_hw_number_t *out_hwirq, unsigned int *out_type); + const u32 *intspec, unsigned int intsize, + irq_hw_number_t *out_hwirq, unsigned int *out_type); int irq_domain_xlate_twocell(struct irq_domain *d, struct device_node *ctrlr, - const u32 *intspec, unsigned int intsize, - irq_hw_number_t *out_hwirq, unsigned int *out_type); + const u32 *intspec, unsigned int intsize, + irq_hw_number_t *out_hwirq, unsigned int *out_type); int irq_domain_xlate_onetwocell(struct irq_domain *d, struct device_node *ctrlr, - const u32 *intspec, unsigned int intsize, - irq_hw_number_t *out_hwirq, unsigned int *out_type); + const u32 *intspec, unsigned int intsize, + irq_hw_number_t *out_hwirq, unsigned int *out_type); +int irq_domain_xlate_twothreecell(struct irq_domain *d, struct device_node *ctrlr, + const u32 *intspec, unsigned int intsize, + irq_hw_number_t *out_hwirq, unsigned int *out_type); + +int irq_domain_translate_onecell(struct irq_domain *d, struct irq_fwspec *fwspec, + unsigned long *out_hwirq, unsigned int *out_type); +int irq_domain_translate_twocell(struct irq_domain *d, struct irq_fwspec *fwspec, + unsigned long *out_hwirq, unsigned int *out_type); +int irq_domain_translate_twothreecell(struct irq_domain *d, struct irq_fwspec *fwspec, + unsigned long *out_hwirq, unsigned int *out_type); + +/* IPI functions */ +int irq_reserve_ipi(struct irq_domain *domain, const struct cpumask *dest); +int irq_destroy_ipi(unsigned int irq, const struct cpumask *dest); + +/* V2 interfaces to support hierarchy IRQ domains. */ +struct irq_data *irq_domain_get_irq_data(struct irq_domain *domain, unsigned int virq); +void irq_domain_set_info(struct irq_domain *domain, unsigned int virq, irq_hw_number_t hwirq, + const struct irq_chip *chip, void *chip_data, irq_flow_handler_t handler, + void *handler_data, const char *handler_name); +void irq_domain_reset_irq_data(struct irq_data *irq_data); +#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY +/** + * irq_domain_create_hierarchy - Add a irqdomain into the hierarchy + * @parent: Parent irq domain to associate with the new domain + * @flags: Irq domain flags associated to the domain + * @size: Size of the domain. See below + * @fwnode: Optional fwnode of the interrupt controller + * @ops: Pointer to the interrupt domain callbacks + * @host_data: Controller private data pointer + * + * If @size is 0 a tree domain is created, otherwise a linear domain. + * + * If successful the parent is associated to the new domain and the + * domain flags are set. + * + * Returns: A pointer to IRQ domain, or %NULL on failure. + */ +static inline struct irq_domain *irq_domain_create_hierarchy(struct irq_domain *parent, + unsigned int flags, unsigned int size, + struct fwnode_handle *fwnode, + const struct irq_domain_ops *ops, + void *host_data) +{ + const struct irq_domain_info info = { + .fwnode = fwnode, + .size = size, + .hwirq_max = size ? : ~0U, + .ops = ops, + .host_data = host_data, + .domain_flags = flags, + .parent = parent, + }; + struct irq_domain *d = irq_domain_instantiate(&info); + + return IS_ERR(d) ? NULL : d; +} + +int __irq_domain_alloc_irqs(struct irq_domain *domain, int irq_base, unsigned int nr_irqs, + int node, void *arg, bool realloc, + const struct irq_affinity_desc *affinity); +void irq_domain_free_irqs(unsigned int virq, unsigned int nr_irqs); +int irq_domain_activate_irq(struct irq_data *irq_data, bool early); +void irq_domain_deactivate_irq(struct irq_data *irq_data); + +/** + * irq_domain_alloc_irqs - Allocate IRQs from domain + * @domain: domain to allocate from + * @nr_irqs: number of IRQs to allocate + * @node: NUMA node id for memory allocation + * @arg: domain specific argument + * + * See __irq_domain_alloc_irqs()' documentation. + */ +static inline int irq_domain_alloc_irqs(struct irq_domain *domain, unsigned int nr_irqs, + int node, void *arg) +{ + return __irq_domain_alloc_irqs(domain, -1, nr_irqs, node, arg, false, NULL); +} + +int irq_domain_set_hwirq_and_chip(struct irq_domain *domain, unsigned int virq, + irq_hw_number_t hwirq, const struct irq_chip *chip, + void *chip_data); +void irq_domain_free_irqs_common(struct irq_domain *domain, unsigned int virq, + unsigned int nr_irqs); +void irq_domain_free_irqs_top(struct irq_domain *domain, unsigned int virq, unsigned int nr_irqs); + +int irq_domain_push_irq(struct irq_domain *domain, int virq, void *arg); +int irq_domain_pop_irq(struct irq_domain *domain, int virq); + +int irq_domain_alloc_irqs_parent(struct irq_domain *domain, unsigned int irq_base, + unsigned int nr_irqs, void *arg); + +void irq_domain_free_irqs_parent(struct irq_domain *domain, unsigned int irq_base, + unsigned int nr_irqs); + +int irq_domain_disconnect_hierarchy(struct irq_domain *domain, unsigned int virq); + +int irq_populate_fwspec_info(struct irq_fwspec *fwspec, struct irq_fwspec_info *info); + +static inline bool irq_domain_is_hierarchy(struct irq_domain *domain) +{ + return domain->flags & IRQ_DOMAIN_FLAG_HIERARCHY; +} + +static inline bool irq_domain_is_ipi(struct irq_domain *domain) +{ + return domain->flags & (IRQ_DOMAIN_FLAG_IPI_PER_CPU | IRQ_DOMAIN_FLAG_IPI_SINGLE); +} + +static inline bool irq_domain_is_ipi_per_cpu(struct irq_domain *domain) +{ + return domain->flags & IRQ_DOMAIN_FLAG_IPI_PER_CPU; +} + +static inline bool irq_domain_is_ipi_single(struct irq_domain *domain) +{ + return domain->flags & IRQ_DOMAIN_FLAG_IPI_SINGLE; +} + +static inline bool irq_domain_is_msi(struct irq_domain *domain) +{ + return domain->flags & IRQ_DOMAIN_FLAG_MSI; +} + +static inline bool irq_domain_is_msi_parent(struct irq_domain *domain) +{ + return domain->flags & IRQ_DOMAIN_FLAG_MSI_PARENT; +} + +static inline bool irq_domain_is_msi_device(struct irq_domain *domain) +{ + return domain->flags & IRQ_DOMAIN_FLAG_MSI_DEVICE; +} + +static inline bool irq_domain_is_msi_immutable(struct irq_domain *domain) +{ + return domain->flags & IRQ_DOMAIN_FLAG_MSI_IMMUTABLE; +} +#else /* CONFIG_IRQ_DOMAIN_HIERARCHY */ +static inline int irq_domain_alloc_irqs(struct irq_domain *domain, unsigned int nr_irqs, + int node, void *arg) +{ + return -1; +} + +static inline void irq_domain_free_irqs(unsigned int virq, unsigned int nr_irqs) { } + +static inline bool irq_domain_is_hierarchy(struct irq_domain *domain) +{ + return false; +} + +static inline bool irq_domain_is_ipi(struct irq_domain *domain) +{ + return false; +} + +static inline bool irq_domain_is_ipi_per_cpu(struct irq_domain *domain) +{ + return false; +} + +static inline bool irq_domain_is_ipi_single(struct irq_domain *domain) +{ + return false; +} + +static inline bool irq_domain_is_msi(struct irq_domain *domain) +{ + return false; +} + +static inline bool irq_domain_is_msi_parent(struct irq_domain *domain) +{ + return false; +} + +static inline bool irq_domain_is_msi_device(struct irq_domain *domain) +{ + return false; +} + +static inline int irq_populate_fwspec_info(struct irq_fwspec *fwspec, struct irq_fwspec_info *info) +{ + return -EINVAL; +} +#endif /* CONFIG_IRQ_DOMAIN_HIERARCHY */ + +#ifdef CONFIG_GENERIC_MSI_IRQ +int msi_device_domain_alloc_wired(struct irq_domain *domain, unsigned int hwirq, unsigned int type); +void msi_device_domain_free_wired(struct irq_domain *domain, unsigned int virq); +#else +static inline int msi_device_domain_alloc_wired(struct irq_domain *domain, unsigned int hwirq, + unsigned int type) +{ + WARN_ON_ONCE(1); + return -EINVAL; +} +static inline void msi_device_domain_free_wired(struct irq_domain *domain, unsigned int virq) +{ + WARN_ON_ONCE(1); +} +#endif + +static inline struct irq_domain *irq_domain_add_tree(struct device_node *of_node, + const struct irq_domain_ops *ops, + void *host_data) +{ + struct irq_domain_info info = { + .fwnode = of_fwnode_handle(of_node), + .hwirq_max = ~0U, + .ops = ops, + .host_data = host_data, + }; + struct irq_domain *d; + + d = irq_domain_instantiate(&info); + return IS_ERR(d) ? NULL : d; +} + +static inline struct irq_domain *irq_domain_add_linear(struct device_node *of_node, + unsigned int size, + const struct irq_domain_ops *ops, + void *host_data) +{ + struct irq_domain_info info = { + .fwnode = of_fwnode_handle(of_node), + .size = size, + .hwirq_max = size, + .ops = ops, + .host_data = host_data, + }; + struct irq_domain *d; + + d = irq_domain_instantiate(&info); + return IS_ERR(d) ? NULL : d; +} #else /* CONFIG_IRQ_DOMAIN */ static inline void irq_dispose_mapping(unsigned int virq) { } +static inline struct irq_domain *irq_find_matching_fwnode(struct fwnode_handle *fwnode, + enum irq_domain_bus_token bus_token) +{ + return NULL; +} #endif /* !CONFIG_IRQ_DOMAIN */ #endif /* _LINUX_IRQDOMAIN_H */ |