cregit-Linux how code gets into the kernel

Release 4.15 kernel/irq/irqdomain.c

Directory: kernel/irq

#define pr_fmt(fmt)  "irq: " fmt

#include <linux/acpi.h>
#include <linux/debugfs.h>
#include <linux/hardirq.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/irqdesc.h>
#include <linux/irqdomain.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/topology.h>
#include <linux/seq_file.h>
#include <linux/slab.h>
#include <linux/smp.h>
#include <linux/fs.h>

static LIST_HEAD(irq_domain_list);
static DEFINE_MUTEX(irq_domain_mutex);


static struct irq_domain *irq_default_domain;

static void irq_domain_check_hierarchy(struct irq_domain *domain);


struct irqchip_fwid {
	
struct fwnode_handle	fwnode;
	
unsigned int		type;
	
char			*name;
	
void *data;
};

#ifdef CONFIG_GENERIC_IRQ_DEBUGFS
static void debugfs_add_domain_dir(struct irq_domain *d);
static void debugfs_remove_domain_dir(struct irq_domain *d);
#else



static inline void debugfs_add_domain_dir(struct irq_domain *d) { }

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static inline void debugfs_remove_domain_dir(struct irq_domain *d) { }

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#endif


const struct fwnode_operations irqchip_fwnode_ops;

EXPORT_SYMBOL_GPL(irqchip_fwnode_ops);

/**
 * irq_domain_alloc_fwnode - Allocate a fwnode_handle suitable for
 *                           identifying an irq domain
 * @type:       Type of irqchip_fwnode. See linux/irqdomain.h
 * @name:       Optional user provided domain name
 * @id:         Optional user provided id if name != NULL
 * @data:       Optional user-provided data
 *
 * Allocate a struct irqchip_fwid, and return a poiner to the embedded
 * fwnode_handle (or NULL on failure).
 *
 * Note: The types IRQCHIP_FWNODE_NAMED and IRQCHIP_FWNODE_NAMED_ID are
 * solely to transport name information to irqdomain creation code. The
 * node is not stored. For other types the pointer is kept in the irq
 * domain struct.
 */



struct fwnode_handle *__irq_domain_alloc_fwnode(unsigned int type, int id,
						const char *name, void *data)
{
	struct irqchip_fwid *fwid;
	char *n;

	fwid = kzalloc(sizeof(*fwid), GFP_KERNEL);

	switch (type) {
	case IRQCHIP_FWNODE_NAMED:
		n = kasprintf(GFP_KERNEL, "%s", name);
		break;
	case IRQCHIP_FWNODE_NAMED_ID:
		n = kasprintf(GFP_KERNEL, "%s-%d", name, id);
		break;
	default:
		n = kasprintf(GFP_KERNEL, "irqchip@%p", data);
		break;
	}

	if (!fwid || !n) {
		kfree(fwid);
		kfree(n);
		return NULL;
	}

	fwid->type = type;
	fwid->name = n;
	fwid->data = data;
	fwid->fwnode.ops = &irqchip_fwnode_ops;
	return &fwid->fwnode;
}

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EXPORT_SYMBOL_GPL(__irq_domain_alloc_fwnode);

/**
 * irq_domain_free_fwnode - Free a non-OF-backed fwnode_handle
 *
 * Free a fwnode_handle allocated with irq_domain_alloc_fwnode.
 */



void irq_domain_free_fwnode(struct fwnode_handle *fwnode)
{
	struct irqchip_fwid *fwid;

	if (WARN_ON(!is_fwnode_irqchip(fwnode)))
		return;

	fwid = container_of(fwnode, struct irqchip_fwid, fwnode);
	kfree(fwid->name);
	kfree(fwid);
}

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EXPORT_SYMBOL_GPL(irq_domain_free_fwnode);

/**
 * __irq_domain_add() - Allocate a new irq_domain data structure
 * @fwnode: firmware node for the interrupt controller
 * @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
 * @ops: domain callbacks
 * @host_data: Controller private data pointer
 *
 * Allocates and initialize and irq_domain structure.
 * Returns pointer to IRQ domain, or NULL on failure.
 */



struct irq_domain *__irq_domain_add(struct fwnode_handle *fwnode, int size,
				    irq_hw_number_t hwirq_max, int direct_max,
				    const struct irq_domain_ops *ops,
				    void *host_data)
{
	struct device_node *of_node = to_of_node(fwnode);
	struct irqchip_fwid *fwid;
	struct irq_domain *domain;

	static atomic_t unknown_domains;

	domain = kzalloc_node(sizeof(*domain) + (sizeof(unsigned int) * size),
			      GFP_KERNEL, of_node_to_nid(of_node));
	if (WARN_ON(!domain))
		return NULL;

	if (fwnode && is_fwnode_irqchip(fwnode)) {
		fwid = container_of(fwnode, struct irqchip_fwid, fwnode);

		switch (fwid->type) {
		case IRQCHIP_FWNODE_NAMED:
		case IRQCHIP_FWNODE_NAMED_ID:
			domain->name = kstrdup(fwid->name, GFP_KERNEL);
			if (!domain->name) {
				kfree(domain);
				return NULL;
			}
			domain->flags |= IRQ_DOMAIN_NAME_ALLOCATED;
			break;
		default:
			domain->fwnode = fwnode;
			domain->name = fwid->name;
			break;
		}
#ifdef CONFIG_ACPI
	} else if (is_acpi_device_node(fwnode)) {
		struct acpi_buffer buf = {
			.length = ACPI_ALLOCATE_BUFFER,
                };
		acpi_handle handle;

		handle = acpi_device_handle(to_acpi_device_node(fwnode));
		if (acpi_get_name(handle, ACPI_FULL_PATHNAME, &buf) == AE_OK) {
			domain->name = buf.pointer;
			domain->flags |= IRQ_DOMAIN_NAME_ALLOCATED;
		}

		domain->fwnode = fwnode;
#endif
	} else if (of_node) {
		char *name;

		/*
                 * DT paths contain '/', which debugfs is legitimately
                 * unhappy about. Replace them with ':', which does
                 * the trick and is not as offensive as '\'...
                 */
		name = kstrdup(of_node_full_name(of_node), GFP_KERNEL);
		if (!name) {
			kfree(domain);
			return NULL;
		}

		strreplace(name, '/', ':');

		domain->name = name;
		domain->fwnode = fwnode;
		domain->flags |= IRQ_DOMAIN_NAME_ALLOCATED;
	}

	if (!domain->name) {
		if (fwnode)
			pr_err("Invalid fwnode type for irqdomain\n");
		domain->name = kasprintf(GFP_KERNEL, "unknown-%d",
					 atomic_inc_return(&unknown_domains));
		if (!domain->name) {
			kfree(domain);
			return NULL;
		}
		domain->flags |= IRQ_DOMAIN_NAME_ALLOCATED;
	}

	of_node_get(of_node);

	/* Fill structure */
	INIT_RADIX_TREE(&domain->revmap_tree, GFP_KERNEL);
	mutex_init(&domain->revmap_tree_mutex);
	domain->ops = ops;
	domain->host_data = host_data;
	domain->hwirq_max = hwirq_max;
	domain->revmap_size = size;
	domain->revmap_direct_max_irq = direct_max;
	irq_domain_check_hierarchy(domain);

	mutex_lock(&irq_domain_mutex);
	debugfs_add_domain_dir(domain);
	list_add(&domain->link, &irq_domain_list);
	mutex_unlock(&irq_domain_mutex);

	pr_debug("Added domain %s\n", domain->name);
	return domain;
}

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Marc Zyngier8918.46%315.79%


Paul Mundt112.28%210.53%


Masahiro Yamada81.66%15.26%


Punit Agrawal71.45%15.26%


Jiang Liu51.04%15.26%


Sakari Ailus10.21%15.26%


Total482100.00%19100.00%




EXPORT_SYMBOL_GPL(__irq_domain_add);

/**
 * irq_domain_remove() - Remove an irq domain.
 * @domain: domain to remove
 *
 * This routine is used to remove an irq domain. The caller must ensure
 * that all mappings within the domain have been disposed of prior to
 * use, depending on the revmap type.
 */



void irq_domain_remove(struct irq_domain *domain)
{
	mutex_lock(&irq_domain_mutex);
	debugfs_remove_domain_dir(domain);

	WARN_ON(!radix_tree_empty(&domain->revmap_tree));

	list_del(&domain->link);

	/*
         * If the going away domain is the default one, reset it.
         */
	if (unlikely(irq_default_domain == domain))
		irq_set_default_host(NULL);

	mutex_unlock(&irq_domain_mutex);

	pr_debug("Removed domain %s\n", domain->name);

	of_node_put(irq_domain_get_of_node(domain));
	if (domain->flags & IRQ_DOMAIN_NAME_ALLOCATED)
		kfree(domain->name);
	kfree(domain);
}

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Marc Zyngier33.03%18.33%


Linus Walleij11.01%18.33%


Total99100.00%12100.00%




EXPORT_SYMBOL_GPL(irq_domain_remove);




void irq_domain_update_bus_token(struct irq_domain *domain,
				 enum irq_domain_bus_token bus_token)
{
	char *name;

	if (domain->bus_token == bus_token)
		return;

	mutex_lock(&irq_domain_mutex);

	domain->bus_token = bus_token;

	name = kasprintf(GFP_KERNEL, "%s-%d", domain->name, bus_token);
	if (!name) {
		mutex_unlock(&irq_domain_mutex);
		return;
	}

	debugfs_remove_domain_dir(domain);

	if (domain->flags & IRQ_DOMAIN_NAME_ALLOCATED)
		kfree(domain->name);
	else
		domain->flags |= IRQ_DOMAIN_NAME_ALLOCATED;

	domain->name = name;
	debugfs_add_domain_dir(domain);

	mutex_unlock(&irq_domain_mutex);
}


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/**
 * irq_domain_add_simple() - Register an irq_domain and optionally map a range of irqs
 * @of_node: pointer to interrupt controller's device tree node.
 * @size: total number of irqs in mapping
 * @first_irq: first number of irq block assigned to the domain,
 *      pass zero to assign irqs on-the-fly. If first_irq is non-zero, then
 *      pre-map all of the irqs in the domain to virqs starting at first_irq.
 * @ops: domain callbacks
 * @host_data: Controller private data pointer
 *
 * Allocates an irq_domain, and optionally if first_irq is positive then also
 * allocate irq_descs and map all of the hwirqs to virqs starting at first_irq.
 *
 * This is intended to implement the expected behaviour for most
 * interrupt controllers. If device tree is used, then first_irq will be 0 and
 * irqs get mapped dynamically on the fly. However, if the controller requires
 * static virq assignments (non-DT boot) then it will set that up correctly.
 */



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 *domain;

	domain = __irq_domain_add(of_node_to_fwnode(of_node), size, size, 0, ops, host_data);
	if (!domain)
		return NULL;

	if (first_irq > 0) {
		if (IS_ENABLED(CONFIG_SPARSE_IRQ)) {
			/* attempt to allocated irq_descs */
			int rc = irq_alloc_descs(first_irq, first_irq, size,
						 of_node_to_nid(of_node));
			if (rc < 0)
				pr_info("Cannot allocate irq_descs @ IRQ%d, assuming pre-allocated\n",
					first_irq);
		}
		irq_domain_associate_many(domain, first_irq, 0, size);
	}

	return domain;
}

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Total125100.00%9100.00%




EXPORT_SYMBOL_GPL(irq_domain_add_simple);

/**
 * irq_domain_add_legacy() - Allocate and register a legacy revmap irq_domain.
 * @of_node: pointer to interrupt controller's device tree node.
 * @size: total number of irqs in legacy mapping
 * @first_irq: first number of irq block assigned to the domain
 * @first_hwirq: first hwirq number to use for the translation. Should normally
 *               be '0', but a positive integer can be used if the effective
 *               hwirqs numbering does not begin at zero.
 * @ops: map/unmap domain callbacks
 * @host_data: Controller private data pointer
 *
 * Note: the map() callback will be called before this function returns
 * for all legacy interrupts except 0 (which is always the invalid irq for
 * a legacy controller).
 */



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)
{
	struct irq_domain *domain;

	domain = __irq_domain_add(of_node_to_fwnode(of_node), first_hwirq + size,
				  first_hwirq + size, 0, ops, host_data);
	if (domain)
		irq_domain_associate_many(domain, first_irq, first_hwirq, size);

	return domain;
}

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EXPORT_SYMBOL_GPL(irq_domain_add_legacy);

/**
 * irq_find_matching_fwspec() - Locates a domain for a given fwspec
 * @fwspec: FW specifier for an interrupt
 * @bus_token: domain-specific data
 */



struct irq_domain *irq_find_matching_fwspec(struct irq_fwspec *fwspec,
					    enum irq_domain_bus_token bus_token)
{
	struct irq_domain *h, *found = NULL;
	struct fwnode_handle *fwnode = fwspec->fwnode;
	int rc;

	/* We might want to match the legacy controller last since
         * it might potentially be set to match all interrupts in
         * the absence of a device node. This isn't a problem so far
         * yet though...
         *
         * bus_token == DOMAIN_BUS_ANY matches any domain, any other
         * values must generate an exact match for the domain to be
         * selected.
         */
	mutex_lock(&irq_domain_mutex);
	list_for_each_entry(h, &irq_domain_list, link) {
		if (h->ops->select && fwspec->param_count)
			rc = h->ops->select(h, fwspec, bus_token);
		else if (h->ops->match)
			rc = h->ops->match(h, to_of_node(fwnode), bus_token);
		else
			rc = ((fwnode != NULL) && (h->fwnode == fwnode) &&
			      ((bus_token == DOMAIN_BUS_ANY) ||
			       (h->bus_token == bus_token)));

		if (rc) {
			found = h;
			break;
		}
	}
	mutex_unlock(&irq_domain_mutex);
	return found;
}

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EXPORT_SYMBOL_GPL(irq_find_matching_fwspec);

/**
 * irq_domain_check_msi_remap - Check whether all MSI irq domains implement
 * IRQ remapping
 *
 * Return: false if any MSI irq domain does not support IRQ remapping,
 * true otherwise (including if there is no MSI irq domain)
 */



bool irq_domain_check_msi_remap(void)
{
	struct irq_domain *h;
	bool ret = true;

	mutex_lock(&irq_domain_mutex);
	list_for_each_entry(h, &irq_domain_list, link) {
		if (irq_domain_is_msi(h) &&
		    !irq_domain_hierarchical_is_msi_remap(h)) {
			ret = false;
			break;
		}
	}
	mutex_unlock(&irq_domain_mutex);
	return ret;
}

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EXPORT_SYMBOL_GPL(irq_domain_check_msi_remap);

/**
 * irq_set_default_host() - Set a "default" irq domain
 * @domain: default domain pointer
 *
 * For convenience, it's possible to set a "default" domain that will be used
 * whenever NULL is passed to irq_create_mapping(). It makes life easier for
 * platforms that want to manipulate a few hard coded interrupt numbers that
 * aren't properly represented in the device-tree.
 */



void irq_set_default_host(struct irq_domain *domain)
{
	pr_debug("Default domain set to @0x%p\n", domain);

	irq_default_domain = domain;
}

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EXPORT_SYMBOL_GPL(irq_set_default_host);




static void irq_domain_clear_mapping(struct irq_domain *domain,
				     irq_hw_number_t hwirq)
{
	if (hwirq < domain->revmap_size) {
		domain->linear_revmap[hwirq] = 0;
	} else {
		mutex_lock(&domain->revmap_tree_mutex);
		radix_tree_delete(&domain->revmap_tree, hwirq);
		mutex_unlock(&domain->revmap_tree_mutex);
	}
}


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static void irq_domain_set_mapping(struct irq_domain *domain,
				   irq_hw_number_t hwirq,
				   struct irq_data *irq_data)
{
	if (hwirq < domain->revmap_size) {
		domain->linear_revmap[hwirq] = irq_data->irq;
	} else {
		mutex_lock(&domain->revmap_tree_mutex);
		radix_tree_insert(&domain->revmap_tree, hwirq, irq_data);
		mutex_unlock(&domain->revmap_tree_mutex);
	}
}


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void irq_domain_disassociate(struct irq_domain *domain, unsigned int irq)
{
	struct irq_data *irq_data = irq_get_irq_data(irq);
	irq_hw_number_t hwirq;

	if (WARN(!irq_data || irq_data->domain != domain,
		 "virq%i doesn't exist; cannot disassociate\n", irq))
		return;

	hwirq = irq_data->hwirq;
	irq_set_status_flags(irq, IRQ_NOREQUEST);

	/* remove chip and handler */
	irq_set_chip_and_handler(irq, NULL, NULL);

	/* Make sure it's completed */
	synchronize_irq(irq);

	/* Tell the PIC about it */
	if (domain->ops->unmap)
		domain->ops->unmap(domain, irq);
	smp_mb();

	irq_data->domain = NULL;
	irq_data->hwirq = 0;
	domain->mapcount--;

	/* Clear reverse map for this hwirq */
	irq_domain_clear_mapping(domain, hwirq);
}


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Total123100.00%6100.00%






int irq_domain_associate(struct irq_domain *domain, unsigned int virq,
			 irq_hw_number_t hwirq)
{
	struct irq_data *irq_data = irq_get_irq_data(virq);
	int ret;

	if (WARN(hwirq >= domain->hwirq_max,
		 "error: hwirq 0x%x is too large for %s\n", (int)hwirq, domain->name))
		return -EINVAL;
	if (WARN(!irq_data, "error: virq%i is not allocated", virq))
		return -EINVAL;
	if (WARN(irq_data->domain, "error: virq%i is already associated", virq))
		return -EINVAL;

	mutex_lock(&irq_domain_mutex);
	irq_data->hwirq = hwirq;
	irq_data->domain = domain;
	if (domain->ops->map) {
		ret = domain->ops->map(domain, virq, hwirq);
		if (ret != 0) {
			/*
                         * If map() returns -EPERM, this interrupt is protected
                         * by the firmware or some other service and shall not
                         * be mapped. Don't bother telling the user about it.
                         */
			if (ret != -EPERM) {
				pr_info("%s didn't like hwirq-0x%lx to VIRQ%i mapping (rc=%d)\n",
				       domain->name, hwirq, virq, ret);
			}
			irq_data->domain = NULL;
			irq_data->hwirq = 0;
			mutex_unlock(&irq_domain_mutex);
			return ret;
		}

		/* If not already assigned, give the domain the chip's name */
		if (!domain->name && irq_data->chip)
			domain->name = irq_data->chip->name;
	}

	domain->mapcount++;
	irq_domain_set_mapping(domain, hwirq, irq_data);
	mutex_unlock(&irq_domain_mutex);

	irq_clear_status_flags(virq, IRQ_NOREQUEST);

	return 0;
}

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Paul Mundt31.26%17.14%


David Daney10.42%17.14%


Total238100.00%14100.00%




EXPORT_SYMBOL_GPL(irq_domain_associate);




void irq_domain_associate_many(struct irq_domain *domain, unsigned int irq_base,
			       irq_hw_number_t hwirq_base, int count)
{
	struct device_node *of_node;
	int i;

	of_node = irq_domain_get_of_node(domain);
	pr_debug("%s(%s, irqbase=%i, hwbase=%i, count=%i)\n", __func__,
		of_node_full_name(of_node), irq_base, (int)hwirq_base, count);

	for (i = 0; i < count; i++) {
		irq_domain_associate(domain, irq_base + i, hwirq_base + i);
	}
}

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EXPORT_SYMBOL_GPL(irq_domain_associate_many);

/**
 * irq_create_direct_mapping() - Allocate an irq for direct mapping
 * @domain: domain to allocate the irq for or NULL for default domain
 *
 * This routine is used for irq controllers which can choose the hardware
 * interrupt numbers they generate. In such a case it's simplest to use
 * the linux irq as the hardware interrupt number. It still uses the linear
 * or radix tree to store the mapping, but the irq controller can optimize
 * the revmap path by using the hwirq directly.
 */



unsigned int irq_create_direct_mapping(struct irq_domain *domain)
{
	struct device_node *of_node;
	unsigned int virq;

	if (domain == NULL)
		domain = irq_default_domain;

	of_node = irq_domain_get_of_node(domain);
	virq = irq_alloc_desc_from(1, of_node_to_nid(of_node));
	if (!virq) {
		pr_debug("create_direct virq allocation failed\n");
		return 0;
	}
	if (virq >= domain->revmap_direct_max_irq) {
		pr_err("ERROR: no free irqs available below %i maximum\n",
			domain->revmap_direct_max_irq);
		irq_free_desc(virq);
		return 0;
	}
	pr_debug("create_direct obtained virq %d\n", virq);

	if (irq_domain_associate(domain, virq, virq)) {
		irq_free_desc(virq);
		return 0;
	}

	return virq;
}

Contributors
PersonTokensPropCommitsCommitProp
Grant C. Likely10485.25%666.67%


Marc Zyngier129.84%111.11%


Paul Mundt64.92%222.22%


Total122100.00%9100.00%




EXPORT_SYMBOL_GPL(irq_create_direct_mapping);

/**
 * 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. Returns a linux
 * irq number.
 * If the sense/trigger is to be specified, set_irq_type() should be called
 * on the number returned from that call.
 */



unsigned int irq_create_mapping(struct irq_domain *domain,
				irq_hw_number_t hwirq)
{
	struct device_node *of_node;
	int virq;

	pr_debug("irq_create_mapping(0x%p, 0x%lx)\n", domain, hwirq);

	/* Look for default domain if nececssary */
	if (domain == NULL)
		domain = irq_default_domain;
	if (domain == NULL) {
		WARN(1, "%s(, %lx) called with NULL domain\n", __func__, hwirq);
		return 0;
	}
	pr_debug("-> using domain @%p\n", domain);

	of_node = irq_domain_get_of_node(domain);

	/* Check if mapping already exists */
	virq = irq_find_mapping(domain, hwirq);
	if (virq) {
		pr_debug("-> existing mapping on virq %d\n", virq);
		return virq;
	}

	/* Allocate a virtual interrupt number */
	virq = irq_domain_alloc_descs(-1, 1, hwirq, of_node_to_nid(of_node), NULL);
	if (virq <= 0) {
		pr_debug("-> virq allocation failed\n");
		return 0;
	}

	if (irq_domain_associate(domain, virq, hwirq)) {
		irq_free_desc(virq);
		return 0;
	}

	pr_debug("irq %lu on domain %s mapped to virtual irq %u\n",
		hwirq, of_node_full_name(of_node), virq);

	return virq;
}

Contributors
PersonTokensPropCommitsCommitProp
Grant C. Likely13978.09%541.67%


Marc Zyngier126.74%18.33%


Paul Mundt95.06%216.67%


Kefeng Wang63.37%18.33%


David Daney52.81%18.33%


Jiang Liu52.81%18.33%


Thomas Gleixner21.12%18.33%


Total178100.00%12100.00%




EXPORT_SYMBOL_GPL(irq_create_mapping);

/**
 * irq_create_strict_mappings() - Map a range of hw irqs to fixed linux irqs
 * @domain: domain owning the interrupt range
 * @irq_base: beginning of linux IRQ range
 * @hwirq_base: beginning of hardware IRQ range
 * @count: Number of interrupts to map
 *
 * This routine is used for allocating and mapping a range of hardware
 * irqs to linux irqs where the linux irq numbers are at pre-defined
 * locations. For use by controllers that already have static mappings
 * to insert in to the domain.
 *
 * Non-linear users can use irq_create_identity_mapping() for IRQ-at-a-time
 * domain insertion.
 *
 * 0 is returned upon success, while any failure to establish a static
 * mapping is treated as an error.
 */



int irq_create_strict_mappings(struct irq_domain *domain, unsigned int irq_base,
			       irq_hw_number_t hwirq_base, int count)
{
	struct device_node *of_node;
	int ret;

	of_node = irq_domain_get_of_node(domain);
	ret = irq_alloc_descs(irq_base, irq_base, count,
			      of_node_to_nid(of_node));
	if (unlikely(ret < 0))
		return ret;

	irq_domain_associate_many(domain, irq_base, hwirq_base, count);
	return 0;
}

Contributors
PersonTokensPropCommitsCommitProp
Grant C. Likely6584.42%150.00%


Marc Zyngier1215.58%150.00%


Total77100.00%2100.00%




EXPORT_SYMBOL_GPL(irq_create_strict_mappings);




static int irq_domain_translate(struct irq_domain *d,
				struct irq_fwspec *fwspec,
				irq_hw_number_t *hwirq, unsigned int *type)
{
#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
	if (d->ops->translate)
		return d->ops->translate(d, fwspec, hwirq, type);
#endif
	if (d->ops->xlate)
		return d->ops->xlate(d, to_of_node(fwspec->fwnode),
				     fwspec->param, fwspec->param_count,
				     hwirq, type);

	/* If domain has no translation, then we assume interrupt line */
	*hwirq = fwspec->param[0];
	return 0;
}


Contributors
PersonTokensPropCommitsCommitProp
Marc Zyngier105100.00%1100.00%


Total105100.00%1100.00%






static void of_phandle_args_to_fwspec(struct of_phandle_args *irq_data,
				      struct irq_fwspec *fwspec)
{
	int i;

	fwspec->fwnode = irq_data->np ? &irq_data->np->fwnode : NULL;
	fwspec->param_count = irq_data->args_count;

	for (i = 0;