/* 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];
};
/* 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 .
* @ 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);
#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 ? : ~0 U,
.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);
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 ;
}
#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
/* Deprecated functions. Will be removed in the merge window */
static inline struct fwnode_handle *of_node_to_fwnode(struct device_node *node)
{
return node ? &node->fwnode : NULL;
}
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 = ~0 U,
.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 */
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(vorverarbeitet am 2026-09-29)
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