[linux.git] / include / linux / ioport.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * ioport.h	Definitions of routines for detecting, reserving and
 *		allocating system resources.
 *
 * Authors:	Linus Torvalds
 */

#ifndef _LINUX_IOPORT_H
#define _LINUX_IOPORT_H

#ifndef __ASSEMBLY__
#include <linux/bits.h>
#include <linux/compiler.h>
#include <linux/minmax.h>
#include <linux/types.h>
/*
 * Resources are tree-like, allowing
 * nesting etc..
 */
struct resource {
	resource_size_t start;
	resource_size_t end;
	const char *name;
	unsigned long flags;
	unsigned long desc;
	struct resource *parent, *sibling, *child;
};

/*
 * IO resources have these defined flags.
 *
 * PCI devices expose these flags to userspace in the "resource" sysfs file,
 * so don't move them.
 */
#define IORESOURCE_BITS		0x000000ff	/* Bus-specific bits */

#define IORESOURCE_TYPE_BITS	0x00001f00	/* Resource type */
#define IORESOURCE_IO		0x00000100	/* PCI/ISA I/O ports */
#define IORESOURCE_MEM		0x00000200
#define IORESOURCE_REG		0x00000300	/* Register offsets */
#define IORESOURCE_IRQ		0x00000400
#define IORESOURCE_DMA		0x00000800
#define IORESOURCE_BUS		0x00001000

#define IORESOURCE_PREFETCH	0x00002000	/* No side effects */
#define IORESOURCE_READONLY	0x00004000
#define IORESOURCE_CACHEABLE	0x00008000
#define IORESOURCE_RANGELENGTH	0x00010000
#define IORESOURCE_SHADOWABLE	0x00020000

#define IORESOURCE_SIZEALIGN	0x00040000	/* size indicates alignment */
#define IORESOURCE_STARTALIGN	0x00080000	/* start field is alignment */

#define IORESOURCE_MEM_64	0x00100000
#define IORESOURCE_WINDOW	0x00200000	/* forwarded by bridge */
#define IORESOURCE_MUXED	0x00400000	/* Resource is software muxed */

#define IORESOURCE_EXT_TYPE_BITS 0x01000000	/* Resource extended types */
#define IORESOURCE_SYSRAM	0x01000000	/* System RAM (modifier) */

/* IORESOURCE_SYSRAM specific bits. */
#define IORESOURCE_SYSRAM_DRIVER_MANAGED	0x02000000 /* Always detected via a driver. */
#define IORESOURCE_SYSRAM_MERGEABLE		0x04000000 /* Resource can be merged. */

#define IORESOURCE_EXCLUSIVE	0x08000000	/* Userland may not map this resource */

#define IORESOURCE_DISABLED	0x10000000
#define IORESOURCE_UNSET	0x20000000	/* No address assigned yet */
#define IORESOURCE_AUTO		0x40000000
#define IORESOURCE_BUSY		0x80000000	/* Driver has marked this resource busy */

/* I/O resource extended types */
#define IORESOURCE_SYSTEM_RAM		(IORESOURCE_MEM|IORESOURCE_SYSRAM)

/* PnP IRQ specific bits (IORESOURCE_BITS) */
#define IORESOURCE_IRQ_HIGHEDGE		(1<<0)
#define IORESOURCE_IRQ_LOWEDGE		(1<<1)
#define IORESOURCE_IRQ_HIGHLEVEL	(1<<2)
#define IORESOURCE_IRQ_LOWLEVEL		(1<<3)
#define IORESOURCE_IRQ_SHAREABLE	(1<<4)
#define IORESOURCE_IRQ_OPTIONAL 	(1<<5)

/* PnP DMA specific bits (IORESOURCE_BITS) */
#define IORESOURCE_DMA_TYPE_MASK	(3<<0)
#define IORESOURCE_DMA_8BIT		(0<<0)
#define IORESOURCE_DMA_8AND16BIT	(1<<0)
#define IORESOURCE_DMA_16BIT		(2<<0)

#define IORESOURCE_DMA_MASTER		(1<<2)
#define IORESOURCE_DMA_BYTE		(1<<3)
#define IORESOURCE_DMA_WORD		(1<<4)

#define IORESOURCE_DMA_SPEED_MASK	(3<<6)
#define IORESOURCE_DMA_COMPATIBLE	(0<<6)
#define IORESOURCE_DMA_TYPEA		(1<<6)
#define IORESOURCE_DMA_TYPEB		(2<<6)
#define IORESOURCE_DMA_TYPEF		(3<<6)

/* PnP memory I/O specific bits (IORESOURCE_BITS) */
#define IORESOURCE_MEM_WRITEABLE	(1<<0)	/* dup: IORESOURCE_READONLY */
#define IORESOURCE_MEM_CACHEABLE	(1<<1)	/* dup: IORESOURCE_CACHEABLE */
#define IORESOURCE_MEM_RANGELENGTH	(1<<2)	/* dup: IORESOURCE_RANGELENGTH */
#define IORESOURCE_MEM_TYPE_MASK	(3<<3)
#define IORESOURCE_MEM_8BIT		(0<<3)
#define IORESOURCE_MEM_16BIT		(1<<3)
#define IORESOURCE_MEM_8AND16BIT	(2<<3)
#define IORESOURCE_MEM_32BIT		(3<<3)
#define IORESOURCE_MEM_SHADOWABLE	(1<<5)	/* dup: IORESOURCE_SHADOWABLE */
#define IORESOURCE_MEM_EXPANSIONROM	(1<<6)

/* PnP I/O specific bits (IORESOURCE_BITS) */
#define IORESOURCE_IO_16BIT_ADDR	(1<<0)
#define IORESOURCE_IO_FIXED		(1<<1)
#define IORESOURCE_IO_SPARSE		(1<<2)

/* PCI ROM control bits (IORESOURCE_BITS) */
#define IORESOURCE_ROM_ENABLE		(1<<0)	/* ROM is enabled, same as PCI_ROM_ADDRESS_ENABLE */
#define IORESOURCE_ROM_SHADOW		(1<<1)	/* Use RAM image, not ROM BAR */

/* PCI control bits.  Shares IORESOURCE_BITS with above PCI ROM.  */
#define IORESOURCE_PCI_FIXED		(1<<4)	/* Do not move resource */
#define IORESOURCE_PCI_EA_BEI		(1<<5)	/* BAR Equivalent Indicator */

/*
 * I/O Resource Descriptors
 *
 * Descriptors are used by walk_iomem_res_desc() and region_intersects()
 * for searching a specific resource range in the iomem table.  Assign
 * a new descriptor when a resource range supports the search interfaces.
 * Otherwise, resource.desc must be set to IORES_DESC_NONE (0).
 */
enum {
	IORES_DESC_NONE				= 0,
	IORES_DESC_CRASH_KERNEL			= 1,
	IORES_DESC_ACPI_TABLES			= 2,
	IORES_DESC_ACPI_NV_STORAGE		= 3,
	IORES_DESC_PERSISTENT_MEMORY		= 4,
	IORES_DESC_PERSISTENT_MEMORY_LEGACY	= 5,
	IORES_DESC_DEVICE_PRIVATE_MEMORY	= 6,
	IORES_DESC_RESERVED			= 7,
	IORES_DESC_SOFT_RESERVED		= 8,
};

/*
 * Flags controlling ioremap() behavior.
 */
enum {
	IORES_MAP_SYSTEM_RAM		= BIT(0),
	IORES_MAP_ENCRYPTED		= BIT(1),
};

/* helpers to define resources */
#define DEFINE_RES_NAMED(_start, _size, _name, _flags)			\
	{								\
		.start = (_start),					\
		.end = (_start) + (_size) - 1,				\
		.name = (_name),					\
		.flags = (_flags),					\
		.desc = IORES_DESC_NONE,				\
	}

#define DEFINE_RES_IO_NAMED(_start, _size, _name)			\
	DEFINE_RES_NAMED((_start), (_size), (_name), IORESOURCE_IO)
#define DEFINE_RES_IO(_start, _size)					\
	DEFINE_RES_IO_NAMED((_start), (_size), NULL)

#define DEFINE_RES_MEM_NAMED(_start, _size, _name)			\
	DEFINE_RES_NAMED((_start), (_size), (_name), IORESOURCE_MEM)
#define DEFINE_RES_MEM(_start, _size)					\
	DEFINE_RES_MEM_NAMED((_start), (_size), NULL)

#define DEFINE_RES_IRQ_NAMED(_irq, _name)				\
	DEFINE_RES_NAMED((_irq), 1, (_name), IORESOURCE_IRQ)
#define DEFINE_RES_IRQ(_irq)						\
	DEFINE_RES_IRQ_NAMED((_irq), NULL)

#define DEFINE_RES_DMA_NAMED(_dma, _name)				\
	DEFINE_RES_NAMED((_dma), 1, (_name), IORESOURCE_DMA)
#define DEFINE_RES_DMA(_dma)						\
	DEFINE_RES_DMA_NAMED((_dma), NULL)

/* PC/ISA/whatever - the normal PC address spaces: IO and memory */
extern struct resource ioport_resource;
extern struct resource iomem_resource;

extern struct resource *request_resource_conflict(struct resource *root, struct resource *new);
extern int request_resource(struct resource *root, struct resource *new);
extern int release_resource(struct resource *new);
void release_child_resources(struct resource *new);
extern void reserve_region_with_split(struct resource *root,
			     resource_size_t start, resource_size_t end,
			     const char *name);
extern struct resource *insert_resource_conflict(struct resource *parent, struct resource *new);
extern int insert_resource(struct resource *parent, struct resource *new);
extern void insert_resource_expand_to_fit(struct resource *root, struct resource *new);
extern int remove_resource(struct resource *old);
extern void arch_remove_reservations(struct resource *avail);
extern int allocate_resource(struct resource *root, struct resource *new,
			     resource_size_t size, resource_size_t min,
			     resource_size_t max, resource_size_t align,
			     resource_size_t (*alignf)(void *,
						       const struct resource *,
						       resource_size_t,
						       resource_size_t),
			     void *alignf_data);
struct resource *lookup_resource(struct resource *root, resource_size_t start);
int adjust_resource(struct resource *res, resource_size_t start,
		    resource_size_t size);
resource_size_t resource_alignment(struct resource *res);
static inline resource_size_t resource_size(const struct resource *res)
{
	return res->end - res->start + 1;
}
static inline unsigned long resource_type(const struct resource *res)
{
	return res->flags & IORESOURCE_TYPE_BITS;
}
static inline unsigned long resource_ext_type(const struct resource *res)
{
	return res->flags & IORESOURCE_EXT_TYPE_BITS;
}
/* True iff r1 completely contains r2 */
static inline bool resource_contains(struct resource *r1, struct resource *r2)
{
	if (resource_type(r1) != resource_type(r2))
		return false;
	if (r1->flags & IORESOURCE_UNSET || r2->flags & IORESOURCE_UNSET)
		return false;
	return r1->start <= r2->start && r1->end >= r2->end;
}

/* True if any part of r1 overlaps r2 */
static inline bool resource_overlaps(struct resource *r1, struct resource *r2)
{
       return r1->start <= r2->end && r1->end >= r2->start;
}

static inline bool
resource_intersection(struct resource *r1, struct resource *r2, struct resource *r)
{
	if (!resource_overlaps(r1, r2))
		return false;
	r->start = max(r1->start, r2->start);
	r->end = min(r1->end, r2->end);
	return true;
}

static inline bool
resource_union(struct resource *r1, struct resource *r2, struct resource *r)
{
	if (!resource_overlaps(r1, r2))
		return false;
	r->start = min(r1->start, r2->start);
	r->end = max(r1->end, r2->end);
	return true;
}

/* Convenience shorthand with allocation */
#define request_region(start,n,name)		__request_region(&ioport_resource, (start), (n), (name), 0)
#define request_muxed_region(start,n,name)	__request_region(&ioport_resource, (start), (n), (name), IORESOURCE_MUXED)
#define __request_mem_region(start,n,name, excl) __request_region(&iomem_resource, (start), (n), (name), excl)
#define request_mem_region(start,n,name) __request_region(&iomem_resource, (start), (n), (name), 0)
#define request_mem_region_exclusive(start,n,name) \
	__request_region(&iomem_resource, (start), (n), (name), IORESOURCE_EXCLUSIVE)
#define rename_region(region, newname) do { (region)->name = (newname); } while (0)

extern struct resource * __request_region(struct resource *,
					resource_size_t start,
					resource_size_t n,
					const char *name, int flags);

/* Compatibility cruft */
#define release_region(start,n)	__release_region(&ioport_resource, (start), (n))
#define release_mem_region(start,n)	__release_region(&iomem_resource, (start), (n))

extern void __release_region(struct resource *, resource_size_t,
				resource_size_t);
#ifdef CONFIG_MEMORY_HOTREMOVE
extern void release_mem_region_adjustable(resource_size_t, resource_size_t);
#endif
#ifdef CONFIG_MEMORY_HOTPLUG
extern void merge_system_ram_resource(struct resource *res);
#endif

/* Wrappers for managed devices */
struct device;

extern int devm_request_resource(struct device *dev, struct resource *root,
				 struct resource *new);
extern void devm_release_resource(struct device *dev, struct resource *new);

#define devm_request_region(dev,start,n,name) \
	__devm_request_region(dev, &ioport_resource, (start), (n), (name))
#define devm_request_mem_region(dev,start,n,name) \
	__devm_request_region(dev, &iomem_resource, (start), (n), (name))

extern struct resource * __devm_request_region(struct device *dev,
				struct resource *parent, resource_size_t start,
				resource_size_t n, const char *name);

#define devm_release_region(dev, start, n) \
	__devm_release_region(dev, &ioport_resource, (start), (n))
#define devm_release_mem_region(dev, start, n) \
	__devm_release_region(dev, &iomem_resource, (start), (n))

extern void __devm_release_region(struct device *dev, struct resource *parent,
				  resource_size_t start, resource_size_t n);
extern int iomem_map_sanity_check(resource_size_t addr, unsigned long size);
extern bool iomem_is_exclusive(u64 addr);

extern int
walk_system_ram_range(unsigned long start_pfn, unsigned long nr_pages,
		void *arg, int (*func)(unsigned long, unsigned long, void *));
extern int
walk_mem_res(u64 start, u64 end, void *arg,
	     int (*func)(struct resource *, void *));
extern int
walk_system_ram_res(u64 start, u64 end, void *arg,
		    int (*func)(struct resource *, void *));
extern int
walk_iomem_res_desc(unsigned long desc, unsigned long flags, u64 start, u64 end,
		    void *arg, int (*func)(struct resource *, void *));

struct resource *devm_request_free_mem_region(struct device *dev,
		struct resource *base, unsigned long size);
struct resource *request_free_mem_region(struct resource *base,
		unsigned long size, const char *name);

static inline void irqresource_disabled(struct resource *res, u32 irq)
{
	res->start = irq;
	res->end = irq;
	res->flags = IORESOURCE_IRQ | IORESOURCE_DISABLED | IORESOURCE_UNSET;
}

#ifdef CONFIG_IO_STRICT_DEVMEM
void revoke_devmem(struct resource *res);
#else
static inline void revoke_devmem(struct resource *res) { };
#endif

#endif /* __ASSEMBLY__ */
#endif	/* _LINUX_IOPORT_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
1da177e4 LT	2	/*
	3	* ioport.h Definitions of routines for detecting, reserving and
	4	* allocating system resources.
	5	*
	6	* Authors: Linus Torvalds
	7	*/
	8
	9	#ifndef _LINUX_IOPORT_H
	10	#define _LINUX_IOPORT_H
	11
c9cce83d	12	#ifndef __ASSEMBLY__
5562f35d	13	#include <linux/bits.h>
1da177e4	14	#include <linux/compiler.h>
5562f35d	15	#include <linux/minmax.h>
cf7c712c	16	#include <linux/types.h>
1da177e4 LT	17	/*
	18	* Resources are tree-like, allowing
	19	* nesting etc..
	20	*/
	21	struct resource {
cf7c712c GKH	22	resource_size_t start;
cf7c712c GKH	23	resource_size_t end;
1da177e4	24	const char *name;
1da177e4	25	unsigned long flags;
43ee493b	26	unsigned long desc;
1da177e4 LT	27	struct resource parent, sibling, *child;
	28	};
	29
1da177e4 LT	30	/*
1da177e4 LT	31	* IO resources have these defined flags.
92efb1bd AW	32	*
	33	* PCI devices expose these flags to userspace in the "resource" sysfs file,
	34	* so don't move them.
1da177e4 LT	35	*/
	36	#define IORESOURCE_BITS 0x000000ff /* Bus-specific bits */
	37
cd7e9fcd	38	#define IORESOURCE_TYPE_BITS 0x00001f00 /* Resource type */
c04a9cb8	39	#define IORESOURCE_IO 0x00000100 /* PCI/ISA I/O ports */
1da177e4	40	#define IORESOURCE_MEM 0x00000200
72dcb119	41	#define IORESOURCE_REG 0x00000300 /* Register offsets */
1da177e4 LT	42	#define IORESOURCE_IRQ 0x00000400
1da177e4 LT	43	#define IORESOURCE_DMA 0x00000800
0f4050c7	44	#define IORESOURCE_BUS 0x00001000
1da177e4	45
cd7e9fcd BH	46	#define IORESOURCE_PREFETCH 0x00002000 /* No side effects */
	47	#define IORESOURCE_READONLY 0x00004000
	48	#define IORESOURCE_CACHEABLE 0x00008000
	49	#define IORESOURCE_RANGELENGTH 0x00010000
	50	#define IORESOURCE_SHADOWABLE 0x00020000
88452565	51
cd7e9fcd BH	52	#define IORESOURCE_SIZEALIGN 0x00040000 /* size indicates alignment */
cd7e9fcd BH	53	#define IORESOURCE_STARTALIGN 0x00080000 /* start field is alignment */
1da177e4	54
1f82de10	55	#define IORESOURCE_MEM_64 0x00100000
9d7cca04	56	#define IORESOURCE_WINDOW 0x00200000 /* forwarded by bridge */
8b6d043b	57	#define IORESOURCE_MUXED 0x00400000 /* Resource is software muxed */
1f82de10	58
9babd5c8 TK	59	#define IORESOURCE_EXT_TYPE_BITS 0x01000000 /* Resource extended types */
	60	#define IORESOURCE_SYSRAM 0x01000000 /* System RAM (modifier) */
	61
7cf603d1 DH	62	/* IORESOURCE_SYSRAM specific bits. */
7cf603d1 DH	63	#define IORESOURCE_SYSRAM_DRIVER_MANAGED 0x02000000 /* Always detected via a driver. */
9ca6551e	64	#define IORESOURCE_SYSRAM_MERGEABLE 0x04000000 /* Resource can be merged. */
7cf603d1	65
e8de1481	66	#define IORESOURCE_EXCLUSIVE 0x08000000 /* Userland may not map this resource */
9babd5c8	67
1da177e4	68	#define IORESOURCE_DISABLED 0x10000000
d19cb803	69	#define IORESOURCE_UNSET 0x20000000 /* No address assigned yet */
1da177e4 LT	70	#define IORESOURCE_AUTO 0x40000000
	71	#define IORESOURCE_BUSY 0x80000000 /* Driver has marked this resource busy */
	72
9babd5c8 TK	73	/* I/O resource extended types */
	74	#define IORESOURCE_SYSTEM_RAM (IORESOURCE_MEM\|IORESOURCE_SYSRAM)
	75
e9fe9e18	76	/* PnP IRQ specific bits (IORESOURCE_BITS) */
1da177e4 LT	77	#define IORESOURCE_IRQ_HIGHEDGE (1<<0)
	78	#define IORESOURCE_IRQ_LOWEDGE (1<<1)
	79	#define IORESOURCE_IRQ_HIGHLEVEL (1<<2)
	80	#define IORESOURCE_IRQ_LOWLEVEL (1<<3)
c32928c5	81	#define IORESOURCE_IRQ_SHAREABLE (1<<4)
d5ebde6e	82	#define IORESOURCE_IRQ_OPTIONAL (1<<5)
1da177e4	83
e9fe9e18	84	/* PnP DMA specific bits (IORESOURCE_BITS) */
1da177e4 LT	85	#define IORESOURCE_DMA_TYPE_MASK (3<<0)
	86	#define IORESOURCE_DMA_8BIT (0<<0)
	87	#define IORESOURCE_DMA_8AND16BIT (1<<0)
	88	#define IORESOURCE_DMA_16BIT (2<<0)
	89
	90	#define IORESOURCE_DMA_MASTER (1<<2)
	91	#define IORESOURCE_DMA_BYTE (1<<3)
	92	#define IORESOURCE_DMA_WORD (1<<4)
	93
	94	#define IORESOURCE_DMA_SPEED_MASK (3<<6)
	95	#define IORESOURCE_DMA_COMPATIBLE (0<<6)
	96	#define IORESOURCE_DMA_TYPEA (1<<6)
	97	#define IORESOURCE_DMA_TYPEB (2<<6)
	98	#define IORESOURCE_DMA_TYPEF (3<<6)
	99
e9fe9e18	100	/* PnP memory I/O specific bits (IORESOURCE_BITS) */
1da177e4 LT	101	#define IORESOURCE_MEM_WRITEABLE (1<<0) /* dup: IORESOURCE_READONLY */
	102	#define IORESOURCE_MEM_CACHEABLE (1<<1) /* dup: IORESOURCE_CACHEABLE */
	103	#define IORESOURCE_MEM_RANGELENGTH (1<<2) /* dup: IORESOURCE_RANGELENGTH */
	104	#define IORESOURCE_MEM_TYPE_MASK (3<<3)
	105	#define IORESOURCE_MEM_8BIT (0<<3)
	106	#define IORESOURCE_MEM_16BIT (1<<3)
	107	#define IORESOURCE_MEM_8AND16BIT (2<<3)
	108	#define IORESOURCE_MEM_32BIT (3<<3)
	109	#define IORESOURCE_MEM_SHADOWABLE (1<<5) /* dup: IORESOURCE_SHADOWABLE */
	110	#define IORESOURCE_MEM_EXPANSIONROM (1<<6)
	111
08c9f262 BH	112	/* PnP I/O specific bits (IORESOURCE_BITS) */
	113	#define IORESOURCE_IO_16BIT_ADDR (1<<0)
	114	#define IORESOURCE_IO_FIXED (1<<1)
91236ecc	115	#define IORESOURCE_IO_SPARSE (1<<2)
08c9f262	116
1da177e4 LT	117	/* PCI ROM control bits (IORESOURCE_BITS) */
1da177e4 LT	118	#define IORESOURCE_ROM_ENABLE (1<<0) /* ROM is enabled, same as PCI_ROM_ADDRESS_ENABLE */
0c0e0736	119	#define IORESOURCE_ROM_SHADOW (1<<1) /* Use RAM image, not ROM BAR */
1da177e4	120
fb0f2b40 RB	121	/* PCI control bits. Shares IORESOURCE_BITS with above PCI ROM. */
fb0f2b40 RB	122	#define IORESOURCE_PCI_FIXED (1<<4) /* Do not move resource */
92efb1bd	123	#define IORESOURCE_PCI_EA_BEI (1<<5) /* BAR Equivalent Indicator */
fb0f2b40	124
43ee493b TK	125	/*
	126	* I/O Resource Descriptors
	127	*
	128	* Descriptors are used by walk_iomem_res_desc() and region_intersects()
	129	* for searching a specific resource range in the iomem table. Assign
	130	* a new descriptor when a resource range supports the search interfaces.
	131	* Otherwise, resource.desc must be set to IORES_DESC_NONE (0).
	132	*/
	133	enum {
	134	IORES_DESC_NONE = 0,
	135	IORES_DESC_CRASH_KERNEL = 1,
	136	IORES_DESC_ACPI_TABLES = 2,
	137	IORES_DESC_ACPI_NV_STORAGE = 3,
	138	IORES_DESC_PERSISTENT_MEMORY = 4,
	139	IORES_DESC_PERSISTENT_MEMORY_LEGACY = 5,
5042db43	140	IORES_DESC_DEVICE_PRIVATE_MEMORY = 6,
fec88ab0	141	IORES_DESC_RESERVED = 7,
262b45ae	142	IORES_DESC_SOFT_RESERVED = 8,
43ee493b	143	};
a0e44d4a	144
5da04cc8 LJ	145	/*
	146	* Flags controlling ioremap() behavior.
	147	*/
	148	enum {
	149	IORES_MAP_SYSTEM_RAM = BIT(0),
	150	IORES_MAP_ENCRYPTED = BIT(1),
	151	};
	152
a0e44d4a UKK	153	/* helpers to define resources */
	154	#define DEFINE_RES_NAMED(_start, _size, _name, _flags) \
	155	{ \
	156	.start = (_start), \
	157	.end = (_start) + (_size) - 1, \
	158	.name = (_name), \
	159	.flags = (_flags), \
43ee493b	160	.desc = IORES_DESC_NONE, \
a0e44d4a UKK	161	}
	162
	163	#define DEFINE_RES_IO_NAMED(_start, _size, _name) \
	164	DEFINE_RES_NAMED((_start), (_size), (_name), IORESOURCE_IO)
	165	#define DEFINE_RES_IO(_start, _size) \
	166	DEFINE_RES_IO_NAMED((_start), (_size), NULL)
	167
	168	#define DEFINE_RES_MEM_NAMED(_start, _size, _name) \
	169	DEFINE_RES_NAMED((_start), (_size), (_name), IORESOURCE_MEM)
	170	#define DEFINE_RES_MEM(_start, _size) \
	171	DEFINE_RES_MEM_NAMED((_start), (_size), NULL)
	172
	173	#define DEFINE_RES_IRQ_NAMED(_irq, _name) \
	174	DEFINE_RES_NAMED((_irq), 1, (_name), IORESOURCE_IRQ)
	175	#define DEFINE_RES_IRQ(_irq) \
	176	DEFINE_RES_IRQ_NAMED((_irq), NULL)
	177
	178	#define DEFINE_RES_DMA_NAMED(_dma, _name) \
	179	DEFINE_RES_NAMED((_dma), 1, (_name), IORESOURCE_DMA)
	180	#define DEFINE_RES_DMA(_dma) \
	181	DEFINE_RES_DMA_NAMED((_dma), NULL)
	182
1da177e4 LT	183	/* PC/ISA/whatever - the normal PC address spaces: IO and memory */
	184	extern struct resource ioport_resource;
	185	extern struct resource iomem_resource;
	186
66f1207b	187	extern struct resource request_resource_conflict(struct resource root, struct resource *new);
1da177e4	188	extern int request_resource(struct resource root, struct resource new);
1da177e4	189	extern int release_resource(struct resource *new);
5eeec0ec	190	void release_child_resources(struct resource *new);
268364a0 YL	191	extern void reserve_region_with_split(struct resource *root,
	192	resource_size_t start, resource_size_t end,
	193	const char *name);
66f1207b	194	extern struct resource insert_resource_conflict(struct resource parent, struct resource *new);
cd6ef2ad	195	extern int insert_resource(struct resource parent, struct resource new);
bef69ea0	196	extern void insert_resource_expand_to_fit(struct resource root, struct resource new);
ff3cc952	197	extern int remove_resource(struct resource *old);
fcb11918	198	extern void arch_remove_reservations(struct resource *avail);
1da177e4	199	extern int allocate_resource(struct resource root, struct resource new,
d75fc8bb GKH	200	resource_size_t size, resource_size_t min,
d75fc8bb GKH	201	resource_size_t max, resource_size_t align,
b26b2d49	202	resource_size_t (alignf)(void ,
3b7a17fc	203	const struct resource *,
b26b2d49 DB	204	resource_size_t,
b26b2d49 DB	205	resource_size_t),
1da177e4	206	void *alignf_data);
1c388919	207	struct resource lookup_resource(struct resource root, resource_size_t start);
d75fc8bb GKH	208	int adjust_resource(struct resource *res, resource_size_t start,
d75fc8bb GKH	209	resource_size_t size);
88452565	210	resource_size_t resource_alignment(struct resource *res);
f65380c0	211	static inline resource_size_t resource_size(const struct resource *res)
1a4e564b MD	212	{
	213	return res->end - res->start + 1;
	214	}
f65380c0	215	static inline unsigned long resource_type(const struct resource *res)
c9f66169 MD	216	{
	217	return res->flags & IORESOURCE_TYPE_BITS;
	218	}
9babd5c8 TK	219	static inline unsigned long resource_ext_type(const struct resource *res)
	220	{
	221	return res->flags & IORESOURCE_EXT_TYPE_BITS;
	222	}
5edb93b8 BH	223	/* True iff r1 completely contains r2 */
	224	static inline bool resource_contains(struct resource r1, struct resource r2)
	225	{
	226	if (resource_type(r1) != resource_type(r2))
	227	return false;
	228	if (r1->flags & IORESOURCE_UNSET \|\| r2->flags & IORESOURCE_UNSET)
	229	return false;
	230	return r1->start <= r2->start && r1->end >= r2->end;
	231	}
	232
1f90f6a8 AS	233	/* True if any part of r1 overlaps r2 */
	234	static inline bool resource_overlaps(struct resource r1, struct resource r2)
	235	{
	236	return r1->start <= r2->end && r1->end >= r2->start;
	237	}
1da177e4	238
f65674df AS	239	static inline bool
	240	resource_intersection(struct resource r1, struct resource r2, struct resource *r)
	241	{
	242	if (!resource_overlaps(r1, r2))
	243	return false;
	244	r->start = max(r1->start, r2->start);
	245	r->end = min(r1->end, r2->end);
	246	return true;
	247	}
	248
5562f35d AS	249	static inline bool
	250	resource_union(struct resource r1, struct resource r2, struct resource *r)
	251	{
	252	if (!resource_overlaps(r1, r2))
	253	return false;
	254	r->start = min(r1->start, r2->start);
	255	r->end = max(r1->end, r2->end);
	256	return true;
	257	}
1da177e4 LT	258
1da177e4 LT	259	/* Convenience shorthand with allocation */
8b6d043b AC	260	#define request_region(start,n,name) __request_region(&ioport_resource, (start), (n), (name), 0)
8b6d043b AC	261	#define request_muxed_region(start,n,name) __request_region(&ioport_resource, (start), (n), (name), IORESOURCE_MUXED)
e8de1481 AV	262	#define __request_mem_region(start,n,name, excl) __request_region(&iomem_resource, (start), (n), (name), excl)
	263	#define request_mem_region(start,n,name) __request_region(&iomem_resource, (start), (n), (name), 0)
	264	#define request_mem_region_exclusive(start,n,name) \
	265	__request_region(&iomem_resource, (start), (n), (name), IORESOURCE_EXCLUSIVE)
1da177e4 LT	266	#define rename_region(region, newname) do { (region)->name = (newname); } while (0)
1da177e4 LT	267
d75fc8bb GKH	268	extern struct resource * __request_region(struct resource *,
d75fc8bb GKH	269	resource_size_t start,
6ae301e8 RD	270	resource_size_t n,
6ae301e8 RD	271	const char *name, int flags);
1da177e4 LT	272
	273	/* Compatibility cruft */
	274	#define release_region(start,n) __release_region(&ioport_resource, (start), (n))
1da177e4 LT	275	#define release_mem_region(start,n) __release_region(&iomem_resource, (start), (n))
1da177e4 LT	276
d75fc8bb GKH	277	extern void __release_region(struct resource *, resource_size_t,
d75fc8bb GKH	278	resource_size_t);
825f787b	279	#ifdef CONFIG_MEMORY_HOTREMOVE
cb8e3c8b	280	extern void release_mem_region_adjustable(resource_size_t, resource_size_t);
825f787b	281	#endif
9ca6551e DH	282	#ifdef CONFIG_MEMORY_HOTPLUG
	283	extern void merge_system_ram_resource(struct resource *res);
	284	#endif
1da177e4	285
9ac7849e TH	286	/* Wrappers for managed devices */
9ac7849e TH	287	struct device;
8d38821c TR	288
	289	extern int devm_request_resource(struct device dev, struct resource root,
	290	struct resource *new);
	291	extern void devm_release_resource(struct device dev, struct resource new);
	292
9ac7849e TH	293	#define devm_request_region(dev,start,n,name) \
	294	__devm_request_region(dev, &ioport_resource, (start), (n), (name))
	295	#define devm_request_mem_region(dev,start,n,name) \
	296	__devm_request_region(dev, &iomem_resource, (start), (n), (name))
	297
	298	extern struct resource * __devm_request_region(struct device *dev,
	299	struct resource *parent, resource_size_t start,
	300	resource_size_t n, const char *name);
	301
dea420ce	302	#define devm_release_region(dev, start, n) \
9ac7849e	303	__devm_release_region(dev, &ioport_resource, (start), (n))
dea420ce	304	#define devm_release_mem_region(dev, start, n) \
9ac7849e TH	305	__devm_release_region(dev, &iomem_resource, (start), (n))
	306
	307	extern void __devm_release_region(struct device dev, struct resource parent,
	308	resource_size_t start, resource_size_t n);
379daf62	309	extern int iomem_map_sanity_check(resource_size_t addr, unsigned long size);
9825b451	310	extern bool iomem_is_exclusive(u64 addr);
9ac7849e	311
908eedc6 KH	312	extern int
	313	walk_system_ram_range(unsigned long start_pfn, unsigned long nr_pages,
	314	void arg, int (func)(unsigned long, unsigned long, void *));
8c86e70a	315	extern int
0e4c12b4 TL	316	walk_mem_res(u64 start, u64 end, void *arg,
	317	int (func)(struct resource , void *));
	318	extern int
8c86e70a	319	walk_system_ram_res(u64 start, u64 end, void *arg,
1d2e733b	320	int (func)(struct resource , void *));
8c86e70a	321	extern int
3f33647c	322	walk_iomem_res_desc(unsigned long desc, unsigned long flags, u64 start, u64 end,
1d2e733b	323	void arg, int (func)(struct resource , void ));
908eedc6	324
0092908d CH	325	struct resource devm_request_free_mem_region(struct device dev,
0092908d CH	326	struct resource *base, unsigned long size);
0c385190 CH	327	struct resource request_free_mem_region(struct resource base,
0c385190 CH	328	unsigned long size, const char *name);
74d24b21	329
9806731d JG	330	static inline void irqresource_disabled(struct resource *res, u32 irq)
	331	{
	332	res->start = irq;
	333	res->end = irq;
	334	res->flags = IORESOURCE_IRQ \| IORESOURCE_DISABLED \| IORESOURCE_UNSET;
	335	}
	336
3234ac66 DW	337	#ifdef CONFIG_IO_STRICT_DEVMEM
	338	void revoke_devmem(struct resource *res);
	339	#else
	340	static inline void revoke_devmem(struct resource *res) { };
	341	#endif
	342
c9cce83d	343	#endif /* __ASSEMBLY__ */
1da177e4	344	#endif /* _LINUX_IOPORT_H */