kernel / include / linux / irqdomain.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * 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 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)

/* 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 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
 * whatever internal data structures management is required. It also needs
 * to setup the irq_desc when returning from map().
 */
struct irq_domain_ops {
	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 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.
 * @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;
	unsigned int			flags;
	unsigned int			mapcount;
	struct mutex			mutex;
	struct irq_domain		*root;

	/* Optional data */
	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_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 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;

/**
 * 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.
 */
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 fwnode && fwnode->ops == &irqchip_fwnode_ops;
}

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)
{
	struct irq_fwspec fwspec = {
		.fwnode = fwnode,
	};

	return irq_find_matching_fwspec(&fwspec, bus_token);
}

static inline struct irq_domain *irq_find_matching_host(struct device_node *node,
							enum irq_domain_bus_token bus_token)
{
	return irq_find_matching_fwnode(of_fwnode_handle(node), bus_token);
}

static inline struct irq_domain *irq_find_host(struct device_node *node)
{
	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;
}

#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);

	return IS_ERR(d) ? NULL : d;
}

unsigned int irq_create_direct_mapping(struct irq_domain *domain);
#endif

/**
 * 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 struct irq_domain *irq_domain_create_linear(struct fwnode_handle *fwnode,
							  unsigned int size,
							  const struct irq_domain_ops *ops,
							  void *host_data)
{
	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;
}

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)
{
	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);
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);
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);
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_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 */