irq_domain: Move irq_domain code from powerpc to kernel/irq (cc79ca69) · Commits · 戴 / test

arch/powerpc/Kconfig

+1 −0

Original line number	Diff line number	Diff line
		@@ -135,6 +135,7 @@ config PPC
		select HAVE_GENERIC_HARDIRQS
		select HAVE_SPARSE_IRQ
		select IRQ_PER_CPU
		select IRQ_DOMAIN
		select GENERIC_IRQ_SHOW
		select GENERIC_IRQ_SHOW_LEVEL
		select IRQ_FORCED_THREADING

arch/powerpc/include/asm/irq.h

+0 −144

Original line number	Diff line number	Diff line
		@@ -42,154 +42,10 @@ extern atomic_t ppc_n_lost_interrupts;
		/* Same thing, used by the generic IRQ code */
		#define NR_IRQS_LEGACY NUM_ISA_INTERRUPTS

		/*
		* The host code and data structures are fairly agnostic to the fact that
		* 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 host->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.
		*/

		struct irq_data;
		extern irq_hw_number_t irqd_to_hwirq(struct irq_data *d);
		extern irq_hw_number_t virq_to_hw(unsigned int virq);

		/**
		* irq_alloc_host - Allocate a new irq_domain data structure
		* @of_node: optional device-tree node of the interrupt controller
		* @revmap_type: type of reverse mapping to use
		* @revmap_arg: for IRQ_DOMAIN_MAP_LINEAR linear only: size of the map
		* @ops: map/unmap host callbacks
		* @inval_irq: provide a hw number in that host space that is always invalid
		*
		* Allocates and initialize and irq_domain structure. Note that in the case of
		* IRQ_DOMAIN_MAP_LEGACY, the map() callback will be called before this returns
		* for all legacy interrupts except 0 (which is always the invalid irq for
		* a legacy controller). For a IRQ_DOMAIN_MAP_LINEAR, the map is allocated by
		* this call as well. For a IRQ_DOMAIN_MAP_TREE, the radix tree will be allocated
		* later during boot automatically (the reverse mapping will use the slow path
		* until that happens).
		*/
		extern struct irq_domain irq_alloc_host(struct device_node of_node,
		unsigned int revmap_type,
		unsigned int revmap_arg,
		struct irq_domain_ops *ops,
		irq_hw_number_t inval_irq);


		/**
		* irq_find_host - Locates a host for a given device node
		* @node: device-tree node of the interrupt controller
		*/
		extern struct irq_domain irq_find_host(struct device_node node);


		/**
		* irq_set_default_host - Set a "default" host
		* @host: default host pointer
		*
		* For convenience, it's possible to set a "default" host 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.
		*/
		extern void irq_set_default_host(struct irq_domain *host);


		/**
		* irq_set_virq_count - Set the maximum number of virt irqs
		* @count: number of linux virtual irqs, capped with NR_IRQS
		*
		* This is mainly for use by platforms like iSeries who want to program
		* the virtual irq number in the controller to avoid the reverse mapping
		*/
		extern void irq_set_virq_count(unsigned int count);


		/**
		* irq_create_mapping - Map a hardware interrupt into linux virq space
		* @host: host owning this hardware interrupt or NULL for default host
		* @hwirq: hardware irq number in that host space
		*
		* Only one mapping per hardware interrupt is permitted. Returns a linux
		* virq number.
		* If the sense/trigger is to be specified, set_irq_type() should be called
		* on the number returned from that call.
		*/
		extern unsigned int irq_create_mapping(struct irq_domain *host,
		irq_hw_number_t hwirq);


		/**
		* irq_dispose_mapping - Unmap an interrupt
		* @virq: linux virq number of the interrupt to unmap
		*/
		extern void irq_dispose_mapping(unsigned int virq);

		/**
		* irq_find_mapping - Find a linux virq from an hw irq number.
		* @host: host owning this hardware interrupt
		* @hwirq: hardware irq number in that host space
		*
		* This is a slow path, for use by generic code. It's expected that an
		* irq controller implementation directly calls the appropriate low level
		* mapping function.
		*/
		extern unsigned int irq_find_mapping(struct irq_domain *host,
		irq_hw_number_t hwirq);

		/**
		* irq_create_direct_mapping - Allocate a virq for direct mapping
		* @host: host to allocate the virq for or NULL for default host
		*
		* 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 virq as the hardware interrupt number.
		*/
		extern unsigned int irq_create_direct_mapping(struct irq_domain *host);

		/**
		* irq_radix_revmap_insert - Insert a hw irq to linux virq number mapping.
		* @host: host owning this hardware interrupt
		* @virq: linux irq number
		* @hwirq: hardware irq number in that host space
		*
		* This is for use by irq controllers that use a radix tree reverse
		* mapping for fast lookup.
		*/
		extern void irq_radix_revmap_insert(struct irq_domain *host, unsigned int virq,
		irq_hw_number_t hwirq);

		/**
		* irq_radix_revmap_lookup - Find a linux virq from a hw irq number.
		* @host: host owning this hardware interrupt
		* @hwirq: hardware irq number in that host space
		*
		* This is a fast path, for use by irq controller code that uses radix tree
		* revmaps
		*/
		extern unsigned int irq_radix_revmap_lookup(struct irq_domain *host,
		irq_hw_number_t hwirq);

		/**
		* irq_linear_revmap - Find a linux virq from a hw irq number.
		* @host: host owning this hardware interrupt
		* @hwirq: hardware irq number in that host space
		*
		* This is a fast path, for use by irq controller code that uses linear
		* revmaps. It does fallback to the slow path if the revmap doesn't exist
		* yet and will create the revmap entry with appropriate locking
		*/

		extern unsigned int irq_linear_revmap(struct irq_domain *host,
		irq_hw_number_t hwirq);


		/**
		* irq_early_init - Init irq remapping subsystem
		*/

arch/powerpc/kernel/irq.c

+0 −502

Original line number	Diff line number	Diff line
		@@ -486,17 +486,6 @@ void do_softirq(void)
		local_irq_restore(flags);
		}


		/*
		* IRQ controller and virtual interrupts
		*/

		static LIST_HEAD(irq_domain_list);
		static DEFINE_MUTEX(irq_domain_mutex);
		static DEFINE_MUTEX(revmap_trees_mutex);
		static unsigned int irq_virq_count = NR_IRQS;
		static struct irq_domain *irq_default_host;

		irq_hw_number_t irqd_to_hwirq(struct irq_data *d)
		{
		return d->hwirq;
		@@ -510,362 +499,6 @@ irq_hw_number_t virq_to_hw(unsigned int virq)
		}
		EXPORT_SYMBOL_GPL(virq_to_hw);

		static int default_irq_host_match(struct irq_domain h, struct device_node np)
		{
		return h->of_node != NULL && h->of_node == np;
		}

		struct irq_domain irq_alloc_host(struct device_node of_node,
		unsigned int revmap_type,
		unsigned int revmap_arg,
		struct irq_domain_ops *ops,
		irq_hw_number_t inval_irq)
		{
		struct irq_domain host, h;
		unsigned int size = sizeof(struct irq_domain);
		unsigned int i;
		unsigned int *rmap;

		/* Allocate structure and revmap table if using linear mapping */
		if (revmap_type == IRQ_DOMAIN_MAP_LINEAR)
		size += revmap_arg * sizeof(unsigned int);
		host = kzalloc(size, GFP_KERNEL);
		if (host == NULL)
		return NULL;

		/* Fill structure */
		host->revmap_type = revmap_type;
		host->inval_irq = inval_irq;
		host->ops = ops;
		host->of_node = of_node_get(of_node);

		if (host->ops->match == NULL)
		host->ops->match = default_irq_host_match;

		mutex_lock(&irq_domain_mutex);
		/* Make sure only one legacy controller can be created */
		if (revmap_type == IRQ_DOMAIN_MAP_LEGACY) {
		list_for_each_entry(h, &irq_domain_list, link) {
		if (WARN_ON(h->revmap_type == IRQ_DOMAIN_MAP_LEGACY)) {
		mutex_unlock(&irq_domain_mutex);
		of_node_put(host->of_node);
		kfree(host);
		return NULL;
		}
		}
		}
		list_add(&host->link, &irq_domain_list);
		mutex_unlock(&irq_domain_mutex);

		/* Additional setups per revmap type */
		switch(revmap_type) {
		case IRQ_DOMAIN_MAP_LEGACY:
		/* 0 is always the invalid number for legacy */
		host->inval_irq = 0;
		/* setup us as the host for all legacy interrupts */
		for (i = 1; i < NUM_ISA_INTERRUPTS; i++) {
		struct irq_data *irq_data = irq_get_irq_data(i);
		irq_data->hwirq = i;
		irq_data->domain = host;

		/* Legacy flags are left to default at this point,
		* one can then use irq_create_mapping() to
		* explicitly change them
		*/
		ops->map(host, i, i);

		/* Clear norequest flags */
		irq_clear_status_flags(i, IRQ_NOREQUEST);
		}
		break;
		case IRQ_DOMAIN_MAP_LINEAR:
		rmap = (unsigned int *)(host + 1);
		for (i = 0; i < revmap_arg; i++)
		rmap[i] = NO_IRQ;
		host->revmap_data.linear.size = revmap_arg;
		host->revmap_data.linear.revmap = rmap;
		break;
		case IRQ_DOMAIN_MAP_TREE:
		INIT_RADIX_TREE(&host->revmap_data.tree, GFP_KERNEL);
		break;
		default:
		break;
		}

		pr_debug("irq: Allocated host of type %d @0x%p\n", revmap_type, host);

		return host;
		}

		struct irq_domain irq_find_host(struct device_node node)
		{
		struct irq_domain h, found = NULL;

		/* 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...
		*/
		mutex_lock(&irq_domain_mutex);
		list_for_each_entry(h, &irq_domain_list, link)
		if (h->ops->match(h, node)) {
		found = h;
		break;
		}
		mutex_unlock(&irq_domain_mutex);
		return found;
		}
		EXPORT_SYMBOL_GPL(irq_find_host);

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

		irq_default_host = host;
		}

		void irq_set_virq_count(unsigned int count)
		{
		pr_debug("irq: Trying to set virq count to %d\n", count);

		BUG_ON(count < NUM_ISA_INTERRUPTS);
		if (count < NR_IRQS)
		irq_virq_count = count;
		}

		static int irq_setup_virq(struct irq_domain *host, unsigned int virq,
		irq_hw_number_t hwirq)
		{
		struct irq_data *irq_data = irq_get_irq_data(virq);

		irq_data->hwirq = hwirq;
		irq_data->domain = host;
		if (host->ops->map(host, virq, hwirq)) {
		pr_debug("irq: -> mapping failed, freeing\n");
		irq_data->domain = NULL;
		irq_data->hwirq = 0;
		return -1;
		}

		irq_clear_status_flags(virq, IRQ_NOREQUEST);

		return 0;
		}

		unsigned int irq_create_direct_mapping(struct irq_domain *host)
		{
		unsigned int virq;

		if (host == NULL)
		host = irq_default_host;

		BUG_ON(host == NULL);
		WARN_ON(host->revmap_type != IRQ_DOMAIN_MAP_NOMAP);

		virq = irq_alloc_desc_from(1, 0);
		if (virq == NO_IRQ) {
		pr_debug("irq: create_direct virq allocation failed\n");
		return NO_IRQ;
		}
		if (virq >= irq_virq_count) {
		pr_err("ERROR: no free irqs available below %i maximum\n",
		irq_virq_count);
		irq_free_desc(virq);
		return 0;
		}

		pr_debug("irq: create_direct obtained virq %d\n", virq);

		if (irq_setup_virq(host, virq, virq)) {
		irq_free_desc(virq);
		return NO_IRQ;
		}

		return virq;
		}

		unsigned int irq_create_mapping(struct irq_domain *host,
		irq_hw_number_t hwirq)
		{
		unsigned int virq, hint;

		pr_debug("irq: irq_create_mapping(0x%p, 0x%lx)\n", host, hwirq);

		/* Look for default host if nececssary */
		if (host == NULL)
		host = irq_default_host;
		if (host == NULL) {
		printk(KERN_WARNING "irq_create_mapping called for"
		" NULL host, hwirq=%lx\n", hwirq);
		WARN_ON(1);
		return NO_IRQ;
		}
		pr_debug("irq: -> using host @%p\n", host);

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

		/* Get a virtual interrupt number */
		if (host->revmap_type == IRQ_DOMAIN_MAP_LEGACY) {
		/* Handle legacy */
		virq = (unsigned int)hwirq;
		if (virq == 0 \|\| virq >= NUM_ISA_INTERRUPTS)
		return NO_IRQ;
		return virq;
		} else {
		/* Allocate a virtual interrupt number */
		hint = hwirq % irq_virq_count;
		if (hint == 0)
		hint = 1;
		virq = irq_alloc_desc_from(hint, 0);
		if (!virq)
		virq = irq_alloc_desc_from(1, 0);
		if (virq == NO_IRQ) {
		pr_debug("irq: -> virq allocation failed\n");
		return NO_IRQ;
		}
		}

		if (irq_setup_virq(host, virq, hwirq)) {
		if (host->revmap_type != IRQ_DOMAIN_MAP_LEGACY)
		irq_free_desc(virq);
		return NO_IRQ;
		}

		pr_debug("irq: irq %lu on host %s mapped to virtual irq %u\n",
		hwirq, host->of_node ? host->of_node->full_name : "null", virq);

		return virq;
		}
		EXPORT_SYMBOL_GPL(irq_create_mapping);

		unsigned int irq_create_of_mapping(struct device_node *controller,
		const u32 *intspec, unsigned int intsize)
		{
		struct irq_domain *host;
		irq_hw_number_t hwirq;
		unsigned int type = IRQ_TYPE_NONE;
		unsigned int virq;

		if (controller == NULL)
		host = irq_default_host;
		else
		host = irq_find_host(controller);
		if (host == NULL) {
		printk(KERN_WARNING "irq: no irq host found for %s !\n",
		controller->full_name);
		return NO_IRQ;
		}

		/* If host has no translation, then we assume interrupt line */
		if (host->ops->xlate == NULL)
		hwirq = intspec[0];
		else {
		if (host->ops->xlate(host, controller, intspec, intsize,
		&hwirq, &type))
		return NO_IRQ;
		}

		/* Create mapping */
		virq = irq_create_mapping(host, hwirq);
		if (virq == NO_IRQ)
		return virq;

		/* Set type if specified and different than the current one */
		if (type != IRQ_TYPE_NONE &&
		type != (irqd_get_trigger_type(irq_get_irq_data(virq))))
		irq_set_irq_type(virq, type);
		return virq;
		}
		EXPORT_SYMBOL_GPL(irq_create_of_mapping);

		void irq_dispose_mapping(unsigned int virq)
		{
		struct irq_data *irq_data = irq_get_irq_data(virq);
		struct irq_domain *host;
		irq_hw_number_t hwirq;

		if (virq == NO_IRQ \|\| !irq_data)
		return;

		host = irq_data->domain;
		if (WARN_ON(host == NULL))
		return;

		/* Never unmap legacy interrupts */
		if (host->revmap_type == IRQ_DOMAIN_MAP_LEGACY)
		return;

		irq_set_status_flags(virq, IRQ_NOREQUEST);

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

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

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

		/* Clear reverse map */
		hwirq = irq_data->hwirq;
		switch(host->revmap_type) {
		case IRQ_DOMAIN_MAP_LINEAR:
		if (hwirq < host->revmap_data.linear.size)
		host->revmap_data.linear.revmap[hwirq] = NO_IRQ;
		break;
		case IRQ_DOMAIN_MAP_TREE:
		mutex_lock(&revmap_trees_mutex);
		radix_tree_delete(&host->revmap_data.tree, hwirq);
		mutex_unlock(&revmap_trees_mutex);
		break;
		}

		/* Destroy map */
		irq_data->hwirq = host->inval_irq;

		irq_free_desc(virq);
		}
		EXPORT_SYMBOL_GPL(irq_dispose_mapping);

		unsigned int irq_find_mapping(struct irq_domain *host,
		irq_hw_number_t hwirq)
		{
		unsigned int i;
		unsigned int hint = hwirq % irq_virq_count;

		/* Look for default host if nececssary */
		if (host == NULL)
		host = irq_default_host;
		if (host == NULL)
		return NO_IRQ;

		/* legacy -> bail early */
		if (host->revmap_type == IRQ_DOMAIN_MAP_LEGACY)
		return hwirq;

		/* Slow path does a linear search of the map */
		if (hint == 0)
		hint = 1;
		i = hint;
		do {
		struct irq_data *data = irq_get_irq_data(i);
		if (data && (data->domain == host) && (data->hwirq == hwirq))
		return i;
		i++;
		if (i >= irq_virq_count)
		i = 1;
		} while(i != hint);
		return NO_IRQ;
		}
		EXPORT_SYMBOL_GPL(irq_find_mapping);

		#ifdef CONFIG_SMP
		int irq_choose_cpu(const struct cpumask *mask)
		{
		@@ -902,146 +535,11 @@ int irq_choose_cpu(const struct cpumask *mask)
		}
		#endif

		unsigned int irq_radix_revmap_lookup(struct irq_domain *host,
		irq_hw_number_t hwirq)
		{
		struct irq_data *irq_data;

		if (WARN_ON_ONCE(host->revmap_type != IRQ_DOMAIN_MAP_TREE))
		return irq_find_mapping(host, hwirq);

		/*
		* Freeing an irq can delete nodes along the path to
		* do the lookup via call_rcu.
		*/
		rcu_read_lock();
		irq_data = radix_tree_lookup(&host->revmap_data.tree, hwirq);
		rcu_read_unlock();

		/*
		* If found in radix tree, then fine.
		* Else fallback to linear lookup - this should not happen in practice
		* as it means that we failed to insert the node in the radix tree.
		*/
		return irq_data ? irq_data->irq : irq_find_mapping(host, hwirq);
		}

		void irq_radix_revmap_insert(struct irq_domain *host, unsigned int virq,
		irq_hw_number_t hwirq)
		{
		struct irq_data *irq_data = irq_get_irq_data(virq);

		if (WARN_ON(host->revmap_type != IRQ_DOMAIN_MAP_TREE))
		return;

		if (virq != NO_IRQ) {
		mutex_lock(&revmap_trees_mutex);
		radix_tree_insert(&host->revmap_data.tree, hwirq, irq_data);
		mutex_unlock(&revmap_trees_mutex);
		}
		}

		unsigned int irq_linear_revmap(struct irq_domain *host,
		irq_hw_number_t hwirq)
		{
		unsigned int *revmap;

		if (WARN_ON_ONCE(host->revmap_type != IRQ_DOMAIN_MAP_LINEAR))
		return irq_find_mapping(host, hwirq);

		/* Check revmap bounds */
		if (unlikely(hwirq >= host->revmap_data.linear.size))
		return irq_find_mapping(host, hwirq);

		/* Check if revmap was allocated */
		revmap = host->revmap_data.linear.revmap;
		if (unlikely(revmap == NULL))
		return irq_find_mapping(host, hwirq);

		/* Fill up revmap with slow path if no mapping found */
		if (unlikely(revmap[hwirq] == NO_IRQ))
		revmap[hwirq] = irq_find_mapping(host, hwirq);

		return revmap[hwirq];
		}

		int arch_early_irq_init(void)
		{
		return 0;
		}

		#ifdef CONFIG_VIRQ_DEBUG
		static int virq_debug_show(struct seq_file m, void private)
		{
		unsigned long flags;
		struct irq_desc *desc;
		const char *p;
		static const char none[] = "none";
		void *data;
		int i;

		seq_printf(m, "%-5s %-7s %-15s %-18s %s\n", "virq", "hwirq",
		"chip name", "chip data", "host name");

		for (i = 1; i < nr_irqs; i++) {
		desc = irq_to_desc(i);
		if (!desc)
		continue;

		raw_spin_lock_irqsave(&desc->lock, flags);

		if (desc->action && desc->action->handler) {
		struct irq_chip *chip;

		seq_printf(m, "%5d ", i);
		seq_printf(m, "0x%05lx ", desc->irq_data.hwirq);

		chip = irq_desc_get_chip(desc);
		if (chip && chip->name)
		p = chip->name;
		else
		p = none;
		seq_printf(m, "%-15s ", p);

		data = irq_desc_get_chip_data(desc);
		seq_printf(m, "0x%16p ", data);

		if (desc->irq_data.domain->of_node)
		p = desc->irq_data.domain->of_node->full_name;
		else
		p = none;
		seq_printf(m, "%s\n", p);
		}

		raw_spin_unlock_irqrestore(&desc->lock, flags);
		}

		return 0;
		}

		static int virq_debug_open(struct inode inode, struct file file)
		{
		return single_open(file, virq_debug_show, inode->i_private);
		}

		static const struct file_operations virq_debug_fops = {
		.open = virq_debug_open,
		.read = seq_read,
		.llseek = seq_lseek,
		.release = single_release,
		};

		static int __init irq_debugfs_init(void)
		{
		if (debugfs_create_file("virq_mapping", S_IRUGO, powerpc_debugfs_root,
		NULL, &virq_debug_fops) == NULL)
		return -ENOMEM;

		return 0;
		}
		__initcall(irq_debugfs_init);
		#endif /* CONFIG_VIRQ_DEBUG */

		#ifdef CONFIG_PPC64
		static int __init setup_noirqdistrib(char *str)
		{

include/linux/irqdomain.h

+42 −4

Original line number	Diff line number	Diff line
		@@ -16,6 +16,17 @@
		* (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.
		*/

		#ifndef _LINUX_IRQDOMAIN_H
		@@ -108,6 +119,32 @@ struct irq_domain {
		};

		#ifdef CONFIG_IRQ_DOMAIN
		#ifdef CONFIG_PPC
		extern struct irq_domain irq_alloc_host(struct device_node of_node,
		unsigned int revmap_type,
		unsigned int revmap_arg,
		struct irq_domain_ops *ops,
		irq_hw_number_t inval_irq);
		extern struct irq_domain irq_find_host(struct device_node node);
		extern void irq_set_default_host(struct irq_domain *host);
		extern void irq_set_virq_count(unsigned int count);


		extern unsigned int irq_create_mapping(struct irq_domain *host,
		irq_hw_number_t hwirq);
		extern void irq_dispose_mapping(unsigned int virq);
		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 void irq_radix_revmap_insert(struct irq_domain *host, unsigned int virq,
		irq_hw_number_t hwirq);
		extern unsigned int irq_radix_revmap_lookup(struct irq_domain *host,
		irq_hw_number_t hwirq);
		extern unsigned int irq_linear_revmap(struct irq_domain *host,
		irq_hw_number_t hwirq);

		#else /* CONFIG_PPC */

		/**
		* irq_domain_to_irq() - Translate from a hardware irq to a linux irq number
		*
		@@ -137,15 +174,16 @@ extern void irq_domain_add(struct irq_domain *domain);
		extern void irq_domain_del(struct irq_domain *domain);

		extern struct irq_domain_ops irq_domain_simple_ops;
		#endif /* CONFIG_IRQ_DOMAIN */

		#if defined(CONFIG_IRQ_DOMAIN) && defined(CONFIG_OF_IRQ)
		#if defined(CONFIG_OF_IRQ)
		extern void irq_domain_add_simple(struct device_node *controller, int irq_base);
		extern void irq_domain_generate_simple(const struct of_device_id *match,
		u64 phys_base, unsigned int irq_start);
		#else /* CONFIG_IRQ_DOMAIN && CONFIG_OF_IRQ */
		#else /* CONFIG_OF_IRQ */
		static inline void irq_domain_generate_simple(const struct of_device_id *match,
		u64 phys_base, unsigned int irq_start) { }
		#endif /* CONFIG_IRQ_DOMAIN && CONFIG_OF_IRQ */
		#endif /* !CONFIG_OF_IRQ */
		#endif /* !CONFIG_PPC */
		#endif /* CONFIG_IRQ_DOMAIN */

		#endif /* _LINUX_IRQDOMAIN_H */

kernel/irq/irqdomain.c

+600 −0

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