irq_domain/powerpc: Use common irq_domain structure instead of irq_host

This patch drops the powerpc-specific irq_host structures and uses the common
irq_domain strucutres defined in linux/irqdomain.h.  It also fixes all
the users to use the new structure names.

Renaming irq_host to irq_domain has been discussed for a long time, and this
patch is a step in the process of generalizing the powerpc virq code to be
usable by all architecture.

An astute reader will notice that this patch actually removes the irq_host
structure instead of renaming it.  This is because the irq_domain structure
already exists in include/linux/irqdomain.h and has the needed data members.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Milton Miller <miltonm@bga.com>
Tested-by: Olof Johansson <olof@lixom.net>

42 files changed, 272 insertions, 343 deletions

diff --git a/arch/powerpc/include/asm/ehv_pic.h b/arch/powerpc/include/asm/ehv_pic.h
index a9e1f4f796f6..dc7d48e3ea90 100644
--- a/arch/powerpc/include/asm/ehv_pic.h
+++ b/arch/powerpc/include/asm/ehv_pic.h
@@ -25,7 +25,7 @@
 
 struct ehv_pic {
 	/* The remapper for this EHV_PIC */
-	struct irq_host	*irqhost;
+	struct irq_domain	*irqhost;
 
 	/* The "linux" controller struct */
 	struct irq_chip	hc_irq;
diff --git a/arch/powerpc/include/asm/i8259.h b/arch/powerpc/include/asm/i8259.h
index 105ade297aad..c3fdfbd5a673 100644
--- a/arch/powerpc/include/asm/i8259.h
+++ b/arch/powerpc/include/asm/i8259.h
@@ -6,7 +6,7 @@
 
 extern void i8259_init(struct device_node *node, unsigned long intack_addr);
 extern unsigned int i8259_irq(void);
-extern struct irq_host *i8259_get_host(void);
+extern struct irq_domain *i8259_get_host(void);
 
 #endif /* __KERNEL__ */
 #endif /* _ASM_POWERPC_I8259_H */
diff --git a/arch/powerpc/include/asm/irq.h b/arch/powerpc/include/asm/irq.h
index c0e1bc319e35..cb06b39f8e61 100644
--- a/arch/powerpc/include/asm/irq.h
+++ b/arch/powerpc/include/asm/irq.h
@@ -9,6 +9,7 @@
  * 2 of the License, or (at your option) any later version.
  */
 
+#include <linux/irqdomain.h>
 #include <linux/threads.h>
 #include <linux/list.h>
 #include <linux/radix-tree.h>
@@ -41,20 +42,7 @@ extern atomic_t ppc_n_lost_interrupts;
 /* Same thing, used by the generic IRQ code */
 #define NR_IRQS_LEGACY		NUM_ISA_INTERRUPTS
 
-/* This type is the placeholder for a hardware interrupt number. It has to
- * be big enough to enclose whatever representation is used by a given
- * platform.
- */
-typedef unsigned long irq_hw_number_t;
-
-/* Interrupt controller "host" data structure. This could be defined as a
- * irq domain controller. That is, it handles the mapping between hardware
- * and virtual interrupt numbers for a given interrupt domain. The host
- * structure is generally created by the PIC code for a given PIC instance
- * (though a host can cover more than one PIC if they have a flat number
- * model). It's the host 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 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
@@ -66,90 +54,32 @@ typedef unsigned long irq_hw_number_t;
  * by some sort of arch-specific void * "token" used to identify interrupt
  * controllers.
  */
-struct irq_host;
-struct radix_tree_root;
-
-/* Functions below are provided by the host and called whenever a new mapping
- * is created or an old mapping is disposed. The host 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_host_ops {
-	/* Match an interrupt controller device node to a host, returns
-	 * 1 on a match
-	 */
-	int (*match)(struct irq_host *h, struct device_node *node);
-
-	/* Create or update a mapping between a virtual irq number and a hw
-	 * irq number. This is called only once for a given mapping.
-	 */
-	int (*map)(struct irq_host *h, unsigned int virq, irq_hw_number_t hw);
-
-	/* Dispose of such a mapping */
-	void (*unmap)(struct irq_host *h, unsigned int virq);
-
-	/* Translate device-tree interrupt specifier from raw format coming
-	 * from the firmware to a irq_hw_number_t (interrupt line number) and
-	 * type (sense) that can be passed to set_irq_type(). In the absence
-	 * of this callback, irq_create_of_mapping() and irq_of_parse_and_map()
-	 * will return the hw number in the first cell and IRQ_TYPE_NONE for
-	 * the type (which amount to keeping whatever default value the
-	 * interrupt controller has for that line)
-	 */
-	int (*xlate)(struct irq_host *h, struct device_node *ctrler,
-		     const u32 *intspec, unsigned int intsize,
-		     irq_hw_number_t *out_hwirq, unsigned int *out_type);
-};
-
-struct irq_host {
-	struct list_head	link;
-
-	/* type of reverse mapping technique */
-	unsigned int		revmap_type;
-#define IRQ_HOST_MAP_LEGACY     0 /* legacy 8259, gets irqs 1..15 */
-#define IRQ_HOST_MAP_NOMAP	1 /* no fast reverse mapping */
-#define IRQ_HOST_MAP_LINEAR	2 /* linear map of interrupts */
-#define IRQ_HOST_MAP_TREE	3 /* radix tree */
-	union {
-		struct {
-			unsigned int size;
-			unsigned int *revmap;
-		} linear;
-		struct radix_tree_root tree;
-	} revmap_data;
-	struct irq_host_ops	*ops;
-	void			*host_data;
-	irq_hw_number_t		inval_irq;
-
-	/* Optional device node pointer */
-	struct device_node	*of_node;
-};
 
 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);
-extern bool virq_is_host(unsigned int virq, struct irq_host *host);
+extern bool virq_is_host(unsigned int virq, struct irq_domain *host);
 
 /**
- * irq_alloc_host - Allocate a new irq_host data structure
+ * 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_HOST_MAP_LINEAR linear only: size of the map
+ * @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_host structure. Note that in the case of
- * IRQ_HOST_MAP_LEGACY, the map() callback will be called before this returns
+ * 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_HOST_MAP_LINEAR, the map is allocated by
- * this call as well. For a IRQ_HOST_MAP_TREE, the radix tree will be allocated
+ * 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_host *irq_alloc_host(struct device_node *of_node,
+extern struct irq_domain *irq_alloc_host(struct device_node *of_node,
 				       unsigned int revmap_type,
 				       unsigned int revmap_arg,
-				       struct irq_host_ops *ops,
+				       struct irq_domain_ops *ops,
 				       irq_hw_number_t inval_irq);
 
 
@@ -157,7 +87,7 @@ extern struct irq_host *irq_alloc_host(struct device_node *of_node,
  * irq_find_host - Locates a host for a given device node
  * @node: device-tree node of the interrupt controller
  */
-extern struct irq_host *irq_find_host(struct device_node *node);
+extern struct irq_domain *irq_find_host(struct device_node *node);
 
 
 /**
@@ -169,7 +99,7 @@ extern struct irq_host *irq_find_host(struct device_node *node);
  * 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_host *host);
+extern void irq_set_default_host(struct irq_domain *host);
 
 
 /**
@@ -192,7 +122,7 @@ extern void irq_set_virq_count(unsigned int count);
  * 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_host *host,
+extern unsigned int irq_create_mapping(struct irq_domain *host,
 				       irq_hw_number_t hwirq);
 
 
@@ -211,7 +141,7 @@ extern void irq_dispose_mapping(unsigned int virq);
  * irq controller implementation directly calls the appropriate low level
  * mapping function.
  */
-extern unsigned int irq_find_mapping(struct irq_host *host,
+extern unsigned int irq_find_mapping(struct irq_domain *host,
 				     irq_hw_number_t hwirq);
 
 /**
@@ -222,7 +152,7 @@ extern unsigned int irq_find_mapping(struct irq_host *host,
  * 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_host *host);
+extern unsigned int irq_create_direct_mapping(struct irq_domain *host);
 
 /**
  * irq_radix_revmap_insert - Insert a hw irq to linux virq number mapping.
@@ -233,7 +163,7 @@ extern unsigned int irq_create_direct_mapping(struct irq_host *host);
  * 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_host *host, unsigned int virq,
+extern void irq_radix_revmap_insert(struct irq_domain *host, unsigned int virq,
 				    irq_hw_number_t hwirq);
 
 /**
@@ -244,7 +174,7 @@ extern void irq_radix_revmap_insert(struct irq_host *host, unsigned int virq,
  * 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_host *host,
+extern unsigned int irq_radix_revmap_lookup(struct irq_domain *host,
 					    irq_hw_number_t hwirq);
 
 /**
@@ -257,7 +187,7 @@ extern unsigned int irq_radix_revmap_lookup(struct irq_host *host,
  * yet and will create the revmap entry with appropriate locking
  */
 
-extern unsigned int irq_linear_revmap(struct irq_host *host,
+extern unsigned int irq_linear_revmap(struct irq_domain *host,
 				      irq_hw_number_t hwirq);
 
 
@@ -272,7 +202,7 @@ extern unsigned int irq_linear_revmap(struct irq_host *host,
  * and that can be used by some irq controllers implementations for things
  * like allocating ranges of numbers for MSIs. The revmaps are left untouched.
  */
-extern unsigned int irq_alloc_virt(struct irq_host *host,
+extern unsigned int irq_alloc_virt(struct irq_domain *host,
 				   unsigned int count,
 				   unsigned int hint);
 
diff --git a/arch/powerpc/include/asm/mpic.h b/arch/powerpc/include/asm/mpic.h
index 67b4d9837236..a5b7c56237f9 100644
--- a/arch/powerpc/include/asm/mpic.h
+++ b/arch/powerpc/include/asm/mpic.h
@@ -255,7 +255,7 @@ struct mpic
 	struct device_node *node;
 
 	/* The remapper for this MPIC */
-	struct irq_host		*irqhost;
+	struct irq_domain	*irqhost;
 
 	/* The "linux" controller struct */
 	struct irq_chip		hc_irq;
diff --git a/arch/powerpc/include/asm/xics.h b/arch/powerpc/include/asm/xics.h
index c48de98ba94e..4ae9a09c3b89 100644
--- a/arch/powerpc/include/asm/xics.h
+++ b/arch/powerpc/include/asm/xics.h
@@ -86,7 +86,7 @@ struct ics {
 extern unsigned int xics_default_server;
 extern unsigned int xics_default_distrib_server;
 extern unsigned int xics_interrupt_server_size;
-extern struct irq_host *xics_host;
+extern struct irq_domain *xics_host;
 
 struct xics_cppr {
 	unsigned char stack[MAX_NUM_PRIORITIES];
diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index 701d4aceb4f4..7305f2f65534 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -498,15 +498,15 @@ void do_softirq(void)
  */
 struct irq_map_entry {
 	irq_hw_number_t	hwirq;
-	struct irq_host	*host;
+	struct irq_domain	*host;
 };
 
-static LIST_HEAD(irq_hosts);
+static LIST_HEAD(irq_domain_list);
 static DEFINE_RAW_SPINLOCK(irq_big_lock);
 static DEFINE_MUTEX(revmap_trees_mutex);
 static struct irq_map_entry irq_map[NR_IRQS];
 static unsigned int irq_virq_count = NR_IRQS;
-static struct irq_host *irq_default_host;
+static struct irq_domain *irq_default_host;
 
 irq_hw_number_t irqd_to_hwirq(struct irq_data *d)
 {
@@ -520,31 +520,31 @@ irq_hw_number_t virq_to_hw(unsigned int virq)
 }
 EXPORT_SYMBOL_GPL(virq_to_hw);
 
-bool virq_is_host(unsigned int virq, struct irq_host *host)
+bool virq_is_host(unsigned int virq, struct irq_domain *host)
 {
 	return irq_map[virq].host == host;
 }
 EXPORT_SYMBOL_GPL(virq_is_host);
 
-static int default_irq_host_match(struct irq_host *h, struct device_node *np)
+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_host *irq_alloc_host(struct device_node *of_node,
+struct irq_domain *irq_alloc_host(struct device_node *of_node,
 				unsigned int revmap_type,
 				unsigned int revmap_arg,
-				struct irq_host_ops *ops,
+				struct irq_domain_ops *ops,
 				irq_hw_number_t inval_irq)
 {
-	struct irq_host *host;
-	unsigned int size = sizeof(struct irq_host);
+	struct irq_domain *host;
+	unsigned int size = sizeof(struct irq_domain);
 	unsigned int i;
 	unsigned int *rmap;
 	unsigned long flags;
 
 	/* Allocate structure and revmap table if using linear mapping */
-	if (revmap_type == IRQ_HOST_MAP_LINEAR)
+	if (revmap_type == IRQ_DOMAIN_MAP_LINEAR)
 		size += revmap_arg * sizeof(unsigned int);
 	host = kzalloc(size, GFP_KERNEL);
 	if (host == NULL)
@@ -564,7 +564,7 @@ struct irq_host *irq_alloc_host(struct device_node *of_node,
 	/* If it's a legacy controller, check for duplicates and
 	 * mark it as allocated (we use irq 0 host pointer for that
 	 */
-	if (revmap_type == IRQ_HOST_MAP_LEGACY) {
+	if (revmap_type == IRQ_DOMAIN_MAP_LEGACY) {
 		if (irq_map[0].host != NULL) {
 			raw_spin_unlock_irqrestore(&irq_big_lock, flags);
 			of_node_put(host->of_node);
@@ -574,12 +574,12 @@ struct irq_host *irq_alloc_host(struct device_node *of_node,
 		irq_map[0].host = host;
 	}
 
-	list_add(&host->link, &irq_hosts);
+	list_add(&host->link, &irq_domain_list);
 	raw_spin_unlock_irqrestore(&irq_big_lock, flags);
 
 	/* Additional setups per revmap type */
 	switch(revmap_type) {
-	case IRQ_HOST_MAP_LEGACY:
+	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 */
@@ -599,7 +599,7 @@ struct irq_host *irq_alloc_host(struct device_node *of_node,
 			irq_clear_status_flags(i, IRQ_NOREQUEST);
 		}
 		break;
-	case IRQ_HOST_MAP_LINEAR:
+	case IRQ_DOMAIN_MAP_LINEAR:
 		rmap = (unsigned int *)(host + 1);
 		for (i = 0; i < revmap_arg; i++)
 			rmap[i] = NO_IRQ;
@@ -607,7 +607,7 @@ struct irq_host *irq_alloc_host(struct device_node *of_node,
 		smp_wmb();
 		host->revmap_data.linear.revmap = rmap;
 		break;
-	case IRQ_HOST_MAP_TREE:
+	case IRQ_DOMAIN_MAP_TREE:
 		INIT_RADIX_TREE(&host->revmap_data.tree, GFP_KERNEL);
 		break;
 	default:
@@ -619,9 +619,9 @@ struct irq_host *irq_alloc_host(struct device_node *of_node,
 	return host;
 }
 
-struct irq_host *irq_find_host(struct device_node *node)
+struct irq_domain *irq_find_host(struct device_node *node)
 {
-	struct irq_host *h, *found = NULL;
+	struct irq_domain *h, *found = NULL;
 	unsigned long flags;
 
 	/* We might want to match the legacy controller last since
@@ -630,7 +630,7 @@ struct irq_host *irq_find_host(struct device_node *node)
 	 * yet though...
 	 */
 	raw_spin_lock_irqsave(&irq_big_lock, flags);
-	list_for_each_entry(h, &irq_hosts, link)
+	list_for_each_entry(h, &irq_domain_list, link)
 		if (h->ops->match(h, node)) {
 			found = h;
 			break;
@@ -640,7 +640,7 @@ struct irq_host *irq_find_host(struct device_node *node)
 }
 EXPORT_SYMBOL_GPL(irq_find_host);
 
-void irq_set_default_host(struct irq_host *host)
+void irq_set_default_host(struct irq_domain *host)
 {
 	pr_debug("irq: Default host set to @0x%p\n", host);
 
@@ -656,7 +656,7 @@ void irq_set_virq_count(unsigned int count)
 		irq_virq_count = count;
 }
 
-static int irq_setup_virq(struct irq_host *host, unsigned int virq,
+static int irq_setup_virq(struct irq_domain *host, unsigned int virq,
 			    irq_hw_number_t hwirq)
 {
 	int res;
@@ -688,7 +688,7 @@ error:
 	return -1;
 }
 
-unsigned int irq_create_direct_mapping(struct irq_host *host)
+unsigned int irq_create_direct_mapping(struct irq_domain *host)
 {
 	unsigned int virq;
 
@@ -696,7 +696,7 @@ unsigned int irq_create_direct_mapping(struct irq_host *host)
 		host = irq_default_host;
 
 	BUG_ON(host == NULL);
-	WARN_ON(host->revmap_type != IRQ_HOST_MAP_NOMAP);
+	WARN_ON(host->revmap_type != IRQ_DOMAIN_MAP_NOMAP);
 
 	virq = irq_alloc_virt(host, 1, 0);
 	if (virq == NO_IRQ) {
@@ -712,7 +712,7 @@ unsigned int irq_create_direct_mapping(struct irq_host *host)
 	return virq;
 }
 
-unsigned int irq_create_mapping(struct irq_host *host,
+unsigned int irq_create_mapping(struct irq_domain *host,
 				irq_hw_number_t hwirq)
 {
 	unsigned int virq, hint;
@@ -738,7 +738,7 @@ unsigned int irq_create_mapping(struct irq_host *host,
 	}
 
 	/* Get a virtual interrupt number */
-	if (host->revmap_type == IRQ_HOST_MAP_LEGACY) {
+	if (host->revmap_type == IRQ_DOMAIN_MAP_LEGACY) {
 		/* Handle legacy */
 		virq = (unsigned int)hwirq;
 		if (virq == 0 || virq >= NUM_ISA_INTERRUPTS)
@@ -767,7 +767,7 @@ EXPORT_SYMBOL_GPL(irq_create_mapping);
 unsigned int irq_create_of_mapping(struct device_node *controller,
 				   const u32 *intspec, unsigned int intsize)
 {
-	struct irq_host *host;
+	struct irq_domain *host;
 	irq_hw_number_t hwirq;
 	unsigned int type = IRQ_TYPE_NONE;
 	unsigned int virq;
@@ -806,7 +806,7 @@ EXPORT_SYMBOL_GPL(irq_create_of_mapping);
 
 void irq_dispose_mapping(unsigned int virq)
 {
-	struct irq_host *host;
+	struct irq_domain *host;
 	irq_hw_number_t hwirq;
 
 	if (virq == NO_IRQ)
@@ -817,7 +817,7 @@ void irq_dispose_mapping(unsigned int virq)
 		return;
 
 	/* Never unmap legacy interrupts */
-	if (host->revmap_type == IRQ_HOST_MAP_LEGACY)
+	if (host->revmap_type == IRQ_DOMAIN_MAP_LEGACY)
 		return;
 
 	irq_set_status_flags(virq, IRQ_NOREQUEST);
@@ -836,11 +836,11 @@ void irq_dispose_mapping(unsigned int virq)
 	/* Clear reverse map */
 	hwirq = irq_map[virq].hwirq;
 	switch(host->revmap_type) {
-	case IRQ_HOST_MAP_LINEAR:
+	case IRQ_DOMAIN_MAP_LINEAR:
 		if (hwirq < host->revmap_data.linear.size)
 			host->revmap_data.linear.revmap[hwirq] = NO_IRQ;
 		break;
-	case IRQ_HOST_MAP_TREE:
+	case IRQ_DOMAIN_MAP_TREE:
 		mutex_lock(&revmap_trees_mutex);
 		radix_tree_delete(&host->revmap_data.tree, hwirq);
 		mutex_unlock(&revmap_trees_mutex);
@@ -857,7 +857,7 @@ void irq_dispose_mapping(unsigned int virq)
 }
 EXPORT_SYMBOL_GPL(irq_dispose_mapping);
 
-unsigned int irq_find_mapping(struct irq_host *host,
+unsigned int irq_find_mapping(struct irq_domain *host,
 			      irq_hw_number_t hwirq)
 {
 	unsigned int i;
@@ -870,7 +870,7 @@ unsigned int irq_find_mapping(struct irq_host *host,
 		return NO_IRQ;
 
 	/* legacy -> bail early */
-	if (host->revmap_type == IRQ_HOST_MAP_LEGACY)
+	if (host->revmap_type == IRQ_DOMAIN_MAP_LEGACY)
 		return hwirq;
 
 	/* Slow path does a linear search of the map */
@@ -925,13 +925,13 @@ int irq_choose_cpu(const struct cpumask *mask)
 }
 #endif
 
-unsigned int irq_radix_revmap_lookup(struct irq_host *host,
+unsigned int irq_radix_revmap_lookup(struct irq_domain *host,
 				     irq_hw_number_t hwirq)
 {
 	struct irq_map_entry *ptr;
 	unsigned int virq;
 
-	if (WARN_ON_ONCE(host->revmap_type != IRQ_HOST_MAP_TREE))
+	if (WARN_ON_ONCE(host->revmap_type != IRQ_DOMAIN_MAP_TREE))
 		return irq_find_mapping(host, hwirq);
 
 	/*
@@ -956,10 +956,10 @@ unsigned int irq_radix_revmap_lookup(struct irq_host *host,
 	return virq;
 }
 
-void irq_radix_revmap_insert(struct irq_host *host, unsigned int virq,
+void irq_radix_revmap_insert(struct irq_domain *host, unsigned int virq,
 			     irq_hw_number_t hwirq)
 {
-	if (WARN_ON(host->revmap_type != IRQ_HOST_MAP_TREE))
+	if (WARN_ON(host->revmap_type != IRQ_DOMAIN_MAP_TREE))
 		return;
 
 	if (virq != NO_IRQ) {
@@ -970,12 +970,12 @@ void irq_radix_revmap_insert(struct irq_host *host, unsigned int virq,
 	}
 }
 
-unsigned int irq_linear_revmap(struct irq_host *host,
+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_HOST_MAP_LINEAR))
+	if (WARN_ON_ONCE(host->revmap_type != IRQ_DOMAIN_MAP_LINEAR))
 		return irq_find_mapping(host, hwirq);
 
 	/* Check revmap bounds */
@@ -994,7 +994,7 @@ unsigned int irq_linear_revmap(struct irq_host *host,
 	return revmap[hwirq];
 }
 
-unsigned int irq_alloc_virt(struct irq_host *host,
+unsigned int irq_alloc_virt(struct irq_domain *host,
 			    unsigned int count,
 			    unsigned int hint)
 {
@@ -1064,7 +1064,7 @@ void irq_free_virt(unsigned int virq, unsigned int count)
 
 	raw_spin_lock_irqsave(&irq_big_lock, flags);
 	for (i = virq; i < (virq + count); i++) {
-		struct irq_host *host;
+		struct irq_domain *host;
 
 		host = irq_map[i].host;
 		irq_map[i].hwirq = host->inval_irq;
diff --git a/arch/powerpc/platforms/512x/mpc5121_ads_cpld.c b/arch/powerpc/platforms/512x/mpc5121_ads_cpld.c
index 9f09319352c0..fefa7977fa9f 100644
--- a/arch/powerpc/platforms/512x/mpc5121_ads_cpld.c
+++ b/arch/powerpc/platforms/512x/mpc5121_ads_cpld.c
@@ -21,7 +21,7 @@
 #include <asm/prom.h>
 
 static struct device_node *cpld_pic_node;
-static struct irq_host *cpld_pic_host;
+static struct irq_domain *cpld_pic_host;
 
 /*
  * Bits to ignore in the misc_status register
@@ -123,13 +123,13 @@ cpld_pic_cascade(unsigned int irq, struct irq_desc *desc)
 }
 
 static int
-cpld_pic_host_match(struct irq_host *h, struct device_node *node)
+cpld_pic_host_match(struct irq_domain *h, struct device_node *node)
 {
 	return cpld_pic_node == node;
 }
 
 static int
-cpld_pic_host_map(struct irq_host *h, unsigned int virq,
+cpld_pic_host_map(struct irq_domain *h, unsigned int virq,
 			     irq_hw_number_t hw)
 {
 	irq_set_status_flags(virq, IRQ_LEVEL);
@@ -137,8 +137,7 @@ cpld_pic_host_map(struct irq_host *h, unsigned int virq,
 	return 0;
 }
 
-static struct
-irq_host_ops cpld_pic_host_ops = {
+static struct irq_domain_ops cpld_pic_host_ops = {
 	.match = cpld_pic_host_match,
 	.map = cpld_pic_host_map,
 };
@@ -192,7 +191,7 @@ mpc5121_ads_cpld_pic_init(void)
 	cpld_pic_node = of_node_get(np);
 
 	cpld_pic_host =
-	    irq_alloc_host(np, IRQ_HOST_MAP_LINEAR, 16, &cpld_pic_host_ops, 16);
+	    irq_alloc_host(np, IRQ_DOMAIN_MAP_LINEAR, 16, &cpld_pic_host_ops, 16);
 	if (!cpld_pic_host) {
 		printk(KERN_ERR "CPLD PIC: failed to allocate irq host!\n");
 		goto end;
diff --git a/arch/powerpc/platforms/52xx/media5200.c b/arch/powerpc/platforms/52xx/media5200.c
index 96f85e5e0cd3..a746415c4242 100644
--- a/arch/powerpc/platforms/52xx/media5200.c
+++ b/arch/powerpc/platforms/52xx/media5200.c
@@ -45,7 +45,7 @@ static struct of_device_id mpc5200_gpio_ids[] __initdata = {
 struct media5200_irq {
 	void __iomem *regs;
 	spinlock_t lock;
-	struct irq_host *irqhost;
+	struct irq_domain *irqhost;
 };
 struct media5200_irq media5200_irq;
 
@@ -112,7 +112,7 @@ void media5200_irq_cascade(unsigned int virq, struct irq_desc *desc)
 	raw_spin_unlock(&desc->lock);
 }
 
-static int media5200_irq_map(struct irq_host *h, unsigned int virq,
+static int media5200_irq_map(struct irq_domain *h, unsigned int virq,
 			     irq_hw_number_t hw)
 {
 	pr_debug("%s: h=%p, virq=%i, hwirq=%i\n", __func__, h, virq, (int)hw);
@@ -122,7 +122,7 @@ static int media5200_irq_map(struct irq_host *h, unsigned int virq,
 	return 0;
 }
 
-static int media5200_irq_xlate(struct irq_host *h, struct device_node *ct,
+static int media5200_irq_xlate(struct irq_domain *h, struct device_node *ct,
 				 const u32 *intspec, unsigned int intsize,
 				 irq_hw_number_t *out_hwirq,
 				 unsigned int *out_flags)
@@ -136,7 +136,7 @@ static int media5200_irq_xlate(struct irq_host *h, struct device_node *ct,
 	return 0;
 }
 
-static struct irq_host_ops media5200_irq_ops = {
+static struct irq_domain_ops media5200_irq_ops = {
 	.map = media5200_irq_map,
 	.xlate = media5200_irq_xlate,
 };
@@ -173,7 +173,7 @@ static void __init media5200_init_irq(void)
 
 	spin_lock_init(&media5200_irq.lock);
 
-	media5200_irq.irqhost = irq_alloc_host(fpga_np, IRQ_HOST_MAP_LINEAR,
+	media5200_irq.irqhost = irq_alloc_host(fpga_np, IRQ_DOMAIN_MAP_LINEAR,
 					       MEDIA5200_NUM_IRQS,
 					       &media5200_irq_ops, -1);
 	if (!media5200_irq.irqhost)
diff --git a/arch/powerpc/platforms/52xx/mpc52xx_gpt.c b/arch/powerpc/platforms/52xx/mpc52xx_gpt.c
index f94f06e52762..e90af8fd8413 100644
--- a/arch/powerpc/platforms/52xx/mpc52xx_gpt.c
+++ b/arch/powerpc/platforms/52xx/mpc52xx_gpt.c
@@ -81,7 +81,7 @@ MODULE_LICENSE("GPL");
  * @regs: virtual address of GPT registers
  * @lock: spinlock to coordinate between different functions.
  * @gc: gpio_chip instance structure; used when GPIO is enabled
- * @irqhost: Pointer to irq_host instance; used when IRQ mode is supported
+ * @irqhost: Pointer to irq