[mirror_ubuntu-bionic-kernel.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/compiler.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) */

#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_DEVICE_PUBLIC_MEMORY		= 7,
};

/* 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;
}


/* 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 int release_mem_region_adjustable(struct resource *, resource_size_t,
				resource_size_t);
#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 int 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 *));

/* 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);
}


#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__
1da177e4	13	#include <linux/compiler.h>
cf7c712c	14	#include <linux/types.h>
1da177e4 LT	15	/*
	16	* Resources are tree-like, allowing
	17	* nesting etc..
	18	*/
	19	struct resource {
cf7c712c GKH	20	resource_size_t start;
cf7c712c GKH	21	resource_size_t end;
1da177e4	22	const char *name;
1da177e4	23	unsigned long flags;
43ee493b	24	unsigned long desc;
1da177e4 LT	25	struct resource parent, sibling, *child;
	26	};
	27
1da177e4 LT	28	/*
1da177e4 LT	29	* IO resources have these defined flags.
92efb1bd AW	30	*
	31	* PCI devices expose these flags to userspace in the "resource" sysfs file,
	32	* so don't move them.
1da177e4 LT	33	*/
	34	#define IORESOURCE_BITS 0x000000ff /* Bus-specific bits */
	35
cd7e9fcd	36	#define IORESOURCE_TYPE_BITS 0x00001f00 /* Resource type */
c04a9cb8	37	#define IORESOURCE_IO 0x00000100 /* PCI/ISA I/O ports */
1da177e4	38	#define IORESOURCE_MEM 0x00000200
72dcb119	39	#define IORESOURCE_REG 0x00000300 /* Register offsets */
1da177e4 LT	40	#define IORESOURCE_IRQ 0x00000400
1da177e4 LT	41	#define IORESOURCE_DMA 0x00000800
0f4050c7	42	#define IORESOURCE_BUS 0x00001000
1da177e4	43
cd7e9fcd BH	44	#define IORESOURCE_PREFETCH 0x00002000 /* No side effects */
	45	#define IORESOURCE_READONLY 0x00004000
	46	#define IORESOURCE_CACHEABLE 0x00008000
	47	#define IORESOURCE_RANGELENGTH 0x00010000
	48	#define IORESOURCE_SHADOWABLE 0x00020000
88452565	49
cd7e9fcd BH	50	#define IORESOURCE_SIZEALIGN 0x00040000 /* size indicates alignment */
cd7e9fcd BH	51	#define IORESOURCE_STARTALIGN 0x00080000 /* start field is alignment */
1da177e4	52
1f82de10	53	#define IORESOURCE_MEM_64 0x00100000
9d7cca04	54	#define IORESOURCE_WINDOW 0x00200000 /* forwarded by bridge */
8b6d043b	55	#define IORESOURCE_MUXED 0x00400000 /* Resource is software muxed */
1f82de10	56
9babd5c8 TK	57	#define IORESOURCE_EXT_TYPE_BITS 0x01000000 /* Resource extended types */
	58	#define IORESOURCE_SYSRAM 0x01000000 /* System RAM (modifier) */
	59
e8de1481	60	#define IORESOURCE_EXCLUSIVE 0x08000000 /* Userland may not map this resource */
9babd5c8	61
1da177e4	62	#define IORESOURCE_DISABLED 0x10000000
d19cb803	63	#define IORESOURCE_UNSET 0x20000000 /* No address assigned yet */
1da177e4 LT	64	#define IORESOURCE_AUTO 0x40000000
	65	#define IORESOURCE_BUSY 0x80000000 /* Driver has marked this resource busy */
	66
9babd5c8 TK	67	/* I/O resource extended types */
	68	#define IORESOURCE_SYSTEM_RAM (IORESOURCE_MEM\|IORESOURCE_SYSRAM)
	69
e9fe9e18	70	/* PnP IRQ specific bits (IORESOURCE_BITS) */
1da177e4 LT	71	#define IORESOURCE_IRQ_HIGHEDGE (1<<0)
	72	#define IORESOURCE_IRQ_LOWEDGE (1<<1)
	73	#define IORESOURCE_IRQ_HIGHLEVEL (1<<2)
	74	#define IORESOURCE_IRQ_LOWLEVEL (1<<3)
c32928c5	75	#define IORESOURCE_IRQ_SHAREABLE (1<<4)
d5ebde6e	76	#define IORESOURCE_IRQ_OPTIONAL (1<<5)
1da177e4	77
e9fe9e18	78	/* PnP DMA specific bits (IORESOURCE_BITS) */
1da177e4 LT	79	#define IORESOURCE_DMA_TYPE_MASK (3<<0)
	80	#define IORESOURCE_DMA_8BIT (0<<0)
	81	#define IORESOURCE_DMA_8AND16BIT (1<<0)
	82	#define IORESOURCE_DMA_16BIT (2<<0)
	83
	84	#define IORESOURCE_DMA_MASTER (1<<2)
	85	#define IORESOURCE_DMA_BYTE (1<<3)
	86	#define IORESOURCE_DMA_WORD (1<<4)
	87
	88	#define IORESOURCE_DMA_SPEED_MASK (3<<6)
	89	#define IORESOURCE_DMA_COMPATIBLE (0<<6)
	90	#define IORESOURCE_DMA_TYPEA (1<<6)
	91	#define IORESOURCE_DMA_TYPEB (2<<6)
	92	#define IORESOURCE_DMA_TYPEF (3<<6)
	93
e9fe9e18	94	/* PnP memory I/O specific bits (IORESOURCE_BITS) */
1da177e4 LT	95	#define IORESOURCE_MEM_WRITEABLE (1<<0) /* dup: IORESOURCE_READONLY */
	96	#define IORESOURCE_MEM_CACHEABLE (1<<1) /* dup: IORESOURCE_CACHEABLE */
	97	#define IORESOURCE_MEM_RANGELENGTH (1<<2) /* dup: IORESOURCE_RANGELENGTH */
	98	#define IORESOURCE_MEM_TYPE_MASK (3<<3)
	99	#define IORESOURCE_MEM_8BIT (0<<3)
	100	#define IORESOURCE_MEM_16BIT (1<<3)
	101	#define IORESOURCE_MEM_8AND16BIT (2<<3)
	102	#define IORESOURCE_MEM_32BIT (3<<3)
	103	#define IORESOURCE_MEM_SHADOWABLE (1<<5) /* dup: IORESOURCE_SHADOWABLE */
	104	#define IORESOURCE_MEM_EXPANSIONROM (1<<6)
	105
08c9f262 BH	106	/* PnP I/O specific bits (IORESOURCE_BITS) */
	107	#define IORESOURCE_IO_16BIT_ADDR (1<<0)
	108	#define IORESOURCE_IO_FIXED (1<<1)
91236ecc	109	#define IORESOURCE_IO_SPARSE (1<<2)
08c9f262	110
1da177e4 LT	111	/* PCI ROM control bits (IORESOURCE_BITS) */
1da177e4 LT	112	#define IORESOURCE_ROM_ENABLE (1<<0) /* ROM is enabled, same as PCI_ROM_ADDRESS_ENABLE */
0c0e0736	113	#define IORESOURCE_ROM_SHADOW (1<<1) /* Use RAM image, not ROM BAR */
1da177e4	114
fb0f2b40 RB	115	/* PCI control bits. Shares IORESOURCE_BITS with above PCI ROM. */
fb0f2b40 RB	116	#define IORESOURCE_PCI_FIXED (1<<4) /* Do not move resource */
92efb1bd	117	#define IORESOURCE_PCI_EA_BEI (1<<5) /* BAR Equivalent Indicator */
fb0f2b40	118
43ee493b TK	119	/*
	120	* I/O Resource Descriptors
	121	*
	122	* Descriptors are used by walk_iomem_res_desc() and region_intersects()
	123	* for searching a specific resource range in the iomem table. Assign
	124	* a new descriptor when a resource range supports the search interfaces.
	125	* Otherwise, resource.desc must be set to IORES_DESC_NONE (0).
	126	*/
	127	enum {
	128	IORES_DESC_NONE = 0,
	129	IORES_DESC_CRASH_KERNEL = 1,
	130	IORES_DESC_ACPI_TABLES = 2,
	131	IORES_DESC_ACPI_NV_STORAGE = 3,
	132	IORES_DESC_PERSISTENT_MEMORY = 4,
	133	IORES_DESC_PERSISTENT_MEMORY_LEGACY = 5,
5042db43	134	IORES_DESC_DEVICE_PRIVATE_MEMORY = 6,
df6ad698	135	IORES_DESC_DEVICE_PUBLIC_MEMORY = 7,
43ee493b	136	};
a0e44d4a UKK	137
	138	/* helpers to define resources */
	139	#define DEFINE_RES_NAMED(_start, _size, _name, _flags) \
	140	{ \
	141	.start = (_start), \
	142	.end = (_start) + (_size) - 1, \
	143	.name = (_name), \
	144	.flags = (_flags), \
43ee493b	145	.desc = IORES_DESC_NONE, \
a0e44d4a UKK	146	}
	147
	148	#define DEFINE_RES_IO_NAMED(_start, _size, _name) \
	149	DEFINE_RES_NAMED((_start), (_size), (_name), IORESOURCE_IO)
	150	#define DEFINE_RES_IO(_start, _size) \
	151	DEFINE_RES_IO_NAMED((_start), (_size), NULL)
	152
	153	#define DEFINE_RES_MEM_NAMED(_start, _size, _name) \
	154	DEFINE_RES_NAMED((_start), (_size), (_name), IORESOURCE_MEM)
	155	#define DEFINE_RES_MEM(_start, _size) \
	156	DEFINE_RES_MEM_NAMED((_start), (_size), NULL)
	157
	158	#define DEFINE_RES_IRQ_NAMED(_irq, _name) \
	159	DEFINE_RES_NAMED((_irq), 1, (_name), IORESOURCE_IRQ)
	160	#define DEFINE_RES_IRQ(_irq) \
	161	DEFINE_RES_IRQ_NAMED((_irq), NULL)
	162
	163	#define DEFINE_RES_DMA_NAMED(_dma, _name) \
	164	DEFINE_RES_NAMED((_dma), 1, (_name), IORESOURCE_DMA)
	165	#define DEFINE_RES_DMA(_dma) \
	166	DEFINE_RES_DMA_NAMED((_dma), NULL)
	167
1da177e4 LT	168	/* PC/ISA/whatever - the normal PC address spaces: IO and memory */
	169	extern struct resource ioport_resource;
	170	extern struct resource iomem_resource;
	171
66f1207b	172	extern struct resource request_resource_conflict(struct resource root, struct resource *new);
1da177e4	173	extern int request_resource(struct resource root, struct resource new);
1da177e4	174	extern int release_resource(struct resource *new);
5eeec0ec	175	void release_child_resources(struct resource *new);
268364a0 YL	176	extern void reserve_region_with_split(struct resource *root,
	177	resource_size_t start, resource_size_t end,
	178	const char *name);
66f1207b	179	extern struct resource insert_resource_conflict(struct resource parent, struct resource *new);
cd6ef2ad	180	extern int insert_resource(struct resource parent, struct resource new);
bef69ea0	181	extern void insert_resource_expand_to_fit(struct resource root, struct resource new);
ff3cc952	182	extern int remove_resource(struct resource *old);
fcb11918	183	extern void arch_remove_reservations(struct resource *avail);
1da177e4	184	extern int allocate_resource(struct resource root, struct resource new,
d75fc8bb GKH	185	resource_size_t size, resource_size_t min,
d75fc8bb GKH	186	resource_size_t max, resource_size_t align,
b26b2d49	187	resource_size_t (alignf)(void ,
3b7a17fc	188	const struct resource *,
b26b2d49 DB	189	resource_size_t,
b26b2d49 DB	190	resource_size_t),
1da177e4	191	void *alignf_data);
1c388919	192	struct resource lookup_resource(struct resource root, resource_size_t start);
d75fc8bb GKH	193	int adjust_resource(struct resource *res, resource_size_t start,
d75fc8bb GKH	194	resource_size_t size);
88452565	195	resource_size_t resource_alignment(struct resource *res);
f65380c0	196	static inline resource_size_t resource_size(const struct resource *res)
1a4e564b MD	197	{
	198	return res->end - res->start + 1;
	199	}
f65380c0	200	static inline unsigned long resource_type(const struct resource *res)
c9f66169 MD	201	{
	202	return res->flags & IORESOURCE_TYPE_BITS;
	203	}
9babd5c8 TK	204	static inline unsigned long resource_ext_type(const struct resource *res)
	205	{
	206	return res->flags & IORESOURCE_EXT_TYPE_BITS;
	207	}
5edb93b8 BH	208	/* True iff r1 completely contains r2 */
	209	static inline bool resource_contains(struct resource r1, struct resource r2)
	210	{
	211	if (resource_type(r1) != resource_type(r2))
	212	return false;
	213	if (r1->flags & IORESOURCE_UNSET \|\| r2->flags & IORESOURCE_UNSET)
	214	return false;
	215	return r1->start <= r2->start && r1->end >= r2->end;
	216	}
	217
1da177e4 LT	218
1da177e4 LT	219	/* Convenience shorthand with allocation */
8b6d043b AC	220	#define request_region(start,n,name) __request_region(&ioport_resource, (start), (n), (name), 0)
8b6d043b AC	221	#define request_muxed_region(start,n,name) __request_region(&ioport_resource, (start), (n), (name), IORESOURCE_MUXED)
e8de1481 AV	222	#define __request_mem_region(start,n,name, excl) __request_region(&iomem_resource, (start), (n), (name), excl)
	223	#define request_mem_region(start,n,name) __request_region(&iomem_resource, (start), (n), (name), 0)
	224	#define request_mem_region_exclusive(start,n,name) \
	225	__request_region(&iomem_resource, (start), (n), (name), IORESOURCE_EXCLUSIVE)
1da177e4 LT	226	#define rename_region(region, newname) do { (region)->name = (newname); } while (0)
1da177e4 LT	227
d75fc8bb GKH	228	extern struct resource * __request_region(struct resource *,
d75fc8bb GKH	229	resource_size_t start,
6ae301e8 RD	230	resource_size_t n,
6ae301e8 RD	231	const char *name, int flags);
1da177e4 LT	232
	233	/* Compatibility cruft */
	234	#define release_region(start,n) __release_region(&ioport_resource, (start), (n))
1da177e4 LT	235	#define release_mem_region(start,n) __release_region(&iomem_resource, (start), (n))
1da177e4 LT	236
d75fc8bb GKH	237	extern void __release_region(struct resource *, resource_size_t,
d75fc8bb GKH	238	resource_size_t);
825f787b TK	239	#ifdef CONFIG_MEMORY_HOTREMOVE
	240	extern int release_mem_region_adjustable(struct resource *, resource_size_t,
	241	resource_size_t);
	242	#endif
1da177e4	243
9ac7849e TH	244	/* Wrappers for managed devices */
9ac7849e TH	245	struct device;
8d38821c TR	246
	247	extern int devm_request_resource(struct device dev, struct resource root,
	248	struct resource *new);
	249	extern void devm_release_resource(struct device dev, struct resource new);
	250
9ac7849e TH	251	#define devm_request_region(dev,start,n,name) \
	252	__devm_request_region(dev, &ioport_resource, (start), (n), (name))
	253	#define devm_request_mem_region(dev,start,n,name) \
	254	__devm_request_region(dev, &iomem_resource, (start), (n), (name))
	255
	256	extern struct resource * __devm_request_region(struct device *dev,
	257	struct resource *parent, resource_size_t start,
	258	resource_size_t n, const char *name);
	259
dea420ce	260	#define devm_release_region(dev, start, n) \
9ac7849e	261	__devm_release_region(dev, &ioport_resource, (start), (n))
dea420ce	262	#define devm_release_mem_region(dev, start, n) \
9ac7849e TH	263	__devm_release_region(dev, &iomem_resource, (start), (n))
	264
	265	extern void __devm_release_region(struct device dev, struct resource parent,
	266	resource_size_t start, resource_size_t n);
379daf62	267	extern int iomem_map_sanity_check(resource_size_t addr, unsigned long size);
e8de1481	268	extern int iomem_is_exclusive(u64 addr);
9ac7849e	269
908eedc6 KH	270	extern int
	271	walk_system_ram_range(unsigned long start_pfn, unsigned long nr_pages,
	272	void arg, int (func)(unsigned long, unsigned long, void *));
8c86e70a	273	extern int
0e4c12b4 TL	274	walk_mem_res(u64 start, u64 end, void *arg,
	275	int (func)(struct resource , void *));
	276	extern int
8c86e70a	277	walk_system_ram_res(u64 start, u64 end, void *arg,
1d2e733b	278	int (func)(struct resource , void *));
8c86e70a	279	extern int
3f33647c	280	walk_iomem_res_desc(unsigned long desc, unsigned long flags, u64 start, u64 end,
1d2e733b	281	void arg, int (func)(struct resource , void ));
908eedc6	282
74d24b21 WY	283	/* True if any part of r1 overlaps r2 */
	284	static inline bool resource_overlaps(struct resource r1, struct resource r2)
	285	{
	286	return (r1->start <= r2->end && r1->end >= r2->start);
	287	}
	288
	289
c9cce83d	290	#endif /* __ASSEMBLY__ */
1da177e4	291	#endif /* _LINUX_IOPORT_H */