[mirror_ubuntu-bionic-kernel.git] / include / linux / ioport.h

/*
 * 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;
	struct resource *parent, *sibling, *child;
};

struct resource_list {
	struct resource_list *next;
	struct resource *res;
	struct pci_dev *dev;
};

/*
 * IO resources have these defined flags.
 */
#define IORESOURCE_BITS		0x000000ff	/* Bus-specific bits */

#define IORESOURCE_TYPE_BITS	0x00000f00	/* Resource type */
#define IORESOURCE_IO		0x00000100
#define IORESOURCE_MEM		0x00000200
#define IORESOURCE_IRQ		0x00000400
#define IORESOURCE_DMA		0x00000800

#define IORESOURCE_PREFETCH	0x00001000	/* No side effects */
#define IORESOURCE_READONLY	0x00002000
#define IORESOURCE_CACHEABLE	0x00004000
#define IORESOURCE_RANGELENGTH	0x00008000
#define IORESOURCE_SHADOWABLE	0x00010000

#define IORESOURCE_SIZEALIGN	0x00020000	/* size indicates alignment */
#define IORESOURCE_STARTALIGN	0x00040000	/* start field is alignment */

#define IORESOURCE_MEM_64	0x00100000

#define IORESOURCE_EXCLUSIVE	0x08000000	/* Userland may not map this resource */
#define IORESOURCE_DISABLED	0x10000000
#define IORESOURCE_UNSET	0x20000000
#define IORESOURCE_AUTO		0x40000000
#define IORESOURCE_BUSY		0x80000000	/* Driver has marked this resource busy */

/* 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)

/* 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)	/* ROM is copy at C000:0 */
#define IORESOURCE_ROM_COPY		(1<<2)	/* ROM is alloc'd copy, resource field overlaid */
#define IORESOURCE_ROM_BIOS_COPY	(1<<3)	/* ROM is BIOS copy, resource field overlaid */

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

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

extern int request_resource(struct resource *root, struct resource *new);
extern int release_resource(struct resource *new);
extern void reserve_region_with_split(struct resource *root,
			     resource_size_t start, resource_size_t end,
			     const char *name);
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 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 *,
						       struct resource *,
						       resource_size_t,
						       resource_size_t),
			     void *alignf_data);
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;
}

/* Convenience shorthand with allocation */
#define request_region(start,n,name)	__request_region(&ioport_resource, (start), (n), (name), 0)
#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 check_mem_region(start,n)	__check_region(&iomem_resource, (start), (n))
#define release_mem_region(start,n)	__release_region(&iomem_resource, (start), (n))

extern int __check_region(struct resource *, resource_size_t, resource_size_t);
extern void __release_region(struct resource *, resource_size_t,
				resource_size_t);

static inline int __deprecated check_region(resource_size_t s,
						resource_size_t n)
{
	return __check_region(&ioport_resource, s, n);
}

/* Wrappers for managed devices */
struct device;
#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 *));

#endif /* __ASSEMBLY__ */
#endif	/* _LINUX_IOPORT_H */
Commit	Line	Data
	1	/*
	2	* ioport.h Definitions of routines for detecting, reserving and
	3	* allocating system resources.
	4	*
	5	* Authors: Linus Torvalds
	6	*/
	7
	8	#ifndef _LINUX_IOPORT_H
	9	#define _LINUX_IOPORT_H
	10
	11	#ifndef __ASSEMBLY__
	12	#include <linux/compiler.h>
	13	#include <linux/types.h>
	14	/*
	15	* Resources are tree-like, allowing
	16	* nesting etc..
	17	*/
	18	struct resource {
	19	resource_size_t start;
	20	resource_size_t end;
	21	const char *name;
	22	unsigned long flags;
	23	struct resource parent, sibling, *child;
	24	};
	25
	26	struct resource_list {
	27	struct resource_list *next;
	28	struct resource *res;
	29	struct pci_dev *dev;
	30	};
	31
	32	/*
	33	* IO resources have these defined flags.
	34	*/
	35	#define IORESOURCE_BITS 0x000000ff /* Bus-specific bits */
	36
	37	#define IORESOURCE_TYPE_BITS 0x00000f00 /* Resource type */
	38	#define IORESOURCE_IO 0x00000100
	39	#define IORESOURCE_MEM 0x00000200
	40	#define IORESOURCE_IRQ 0x00000400
	41	#define IORESOURCE_DMA 0x00000800
	42
	43	#define IORESOURCE_PREFETCH 0x00001000 /* No side effects */
	44	#define IORESOURCE_READONLY 0x00002000
	45	#define IORESOURCE_CACHEABLE 0x00004000
	46	#define IORESOURCE_RANGELENGTH 0x00008000
	47	#define IORESOURCE_SHADOWABLE 0x00010000
	48
	49	#define IORESOURCE_SIZEALIGN 0x00020000 /* size indicates alignment */
	50	#define IORESOURCE_STARTALIGN 0x00040000 /* start field is alignment */
	51
	52	#define IORESOURCE_MEM_64 0x00100000
	53
	54	#define IORESOURCE_EXCLUSIVE 0x08000000 /* Userland may not map this resource */
	55	#define IORESOURCE_DISABLED 0x10000000
	56	#define IORESOURCE_UNSET 0x20000000
	57	#define IORESOURCE_AUTO 0x40000000
	58	#define IORESOURCE_BUSY 0x80000000 /* Driver has marked this resource busy */
	59
	60	/* PnP IRQ specific bits (IORESOURCE_BITS) */
	61	#define IORESOURCE_IRQ_HIGHEDGE (1<<0)
	62	#define IORESOURCE_IRQ_LOWEDGE (1<<1)
	63	#define IORESOURCE_IRQ_HIGHLEVEL (1<<2)
	64	#define IORESOURCE_IRQ_LOWLEVEL (1<<3)
	65	#define IORESOURCE_IRQ_SHAREABLE (1<<4)
	66	#define IORESOURCE_IRQ_OPTIONAL (1<<5)
	67
	68	/* PnP DMA specific bits (IORESOURCE_BITS) */
	69	#define IORESOURCE_DMA_TYPE_MASK (3<<0)
	70	#define IORESOURCE_DMA_8BIT (0<<0)
	71	#define IORESOURCE_DMA_8AND16BIT (1<<0)
	72	#define IORESOURCE_DMA_16BIT (2<<0)
	73
	74	#define IORESOURCE_DMA_MASTER (1<<2)
	75	#define IORESOURCE_DMA_BYTE (1<<3)
	76	#define IORESOURCE_DMA_WORD (1<<4)
	77
	78	#define IORESOURCE_DMA_SPEED_MASK (3<<6)
	79	#define IORESOURCE_DMA_COMPATIBLE (0<<6)
	80	#define IORESOURCE_DMA_TYPEA (1<<6)
	81	#define IORESOURCE_DMA_TYPEB (2<<6)
	82	#define IORESOURCE_DMA_TYPEF (3<<6)
	83
	84	/* PnP memory I/O specific bits (IORESOURCE_BITS) */
	85	#define IORESOURCE_MEM_WRITEABLE (1<<0) /* dup: IORESOURCE_READONLY */
	86	#define IORESOURCE_MEM_CACHEABLE (1<<1) /* dup: IORESOURCE_CACHEABLE */
	87	#define IORESOURCE_MEM_RANGELENGTH (1<<2) /* dup: IORESOURCE_RANGELENGTH */
	88	#define IORESOURCE_MEM_TYPE_MASK (3<<3)
	89	#define IORESOURCE_MEM_8BIT (0<<3)
	90	#define IORESOURCE_MEM_16BIT (1<<3)
	91	#define IORESOURCE_MEM_8AND16BIT (2<<3)
	92	#define IORESOURCE_MEM_32BIT (3<<3)
	93	#define IORESOURCE_MEM_SHADOWABLE (1<<5) /* dup: IORESOURCE_SHADOWABLE */
	94	#define IORESOURCE_MEM_EXPANSIONROM (1<<6)
	95
	96	/* PnP I/O specific bits (IORESOURCE_BITS) */
	97	#define IORESOURCE_IO_16BIT_ADDR (1<<0)
	98	#define IORESOURCE_IO_FIXED (1<<1)
	99
	100	/* PCI ROM control bits (IORESOURCE_BITS) */
	101	#define IORESOURCE_ROM_ENABLE (1<<0) /* ROM is enabled, same as PCI_ROM_ADDRESS_ENABLE */
	102	#define IORESOURCE_ROM_SHADOW (1<<1) /* ROM is copy at C000:0 */
	103	#define IORESOURCE_ROM_COPY (1<<2) /* ROM is alloc'd copy, resource field overlaid */
	104	#define IORESOURCE_ROM_BIOS_COPY (1<<3) /* ROM is BIOS copy, resource field overlaid */
	105
	106	/* PCI control bits. Shares IORESOURCE_BITS with above PCI ROM. */
	107	#define IORESOURCE_PCI_FIXED (1<<4) /* Do not move resource */
	108
	109	/* PC/ISA/whatever - the normal PC address spaces: IO and memory */
	110	extern struct resource ioport_resource;
	111	extern struct resource iomem_resource;
	112
	113	extern int request_resource(struct resource root, struct resource new);
	114	extern int release_resource(struct resource *new);
	115	extern void reserve_region_with_split(struct resource *root,
	116	resource_size_t start, resource_size_t end,
	117	const char *name);
	118	extern int insert_resource(struct resource parent, struct resource new);
	119	extern void insert_resource_expand_to_fit(struct resource root, struct resource new);
	120	extern int allocate_resource(struct resource root, struct resource new,
	121	resource_size_t size, resource_size_t min,
	122	resource_size_t max, resource_size_t align,
	123	resource_size_t (alignf)(void ,
	124	struct resource *,
	125	resource_size_t,
	126	resource_size_t),
	127	void *alignf_data);
	128	int adjust_resource(struct resource *res, resource_size_t start,
	129	resource_size_t size);
	130	resource_size_t resource_alignment(struct resource *res);
	131	static inline resource_size_t resource_size(const struct resource *res)
	132	{
	133	return res->end - res->start + 1;
	134	}
	135	static inline unsigned long resource_type(const struct resource *res)
	136	{
	137	return res->flags & IORESOURCE_TYPE_BITS;
	138	}
	139
	140	/* Convenience shorthand with allocation */
	141	#define request_region(start,n,name) __request_region(&ioport_resource, (start), (n), (name), 0)
	142	#define __request_mem_region(start,n,name, excl) __request_region(&iomem_resource, (start), (n), (name), excl)
	143	#define request_mem_region(start,n,name) __request_region(&iomem_resource, (start), (n), (name), 0)
	144	#define request_mem_region_exclusive(start,n,name) \
	145	__request_region(&iomem_resource, (start), (n), (name), IORESOURCE_EXCLUSIVE)
	146	#define rename_region(region, newname) do { (region)->name = (newname); } while (0)
	147
	148	extern struct resource * __request_region(struct resource *,
	149	resource_size_t start,
	150	resource_size_t n,
	151	const char *name, int flags);
	152
	153	/* Compatibility cruft */
	154	#define release_region(start,n) __release_region(&ioport_resource, (start), (n))
	155	#define check_mem_region(start,n) __check_region(&iomem_resource, (start), (n))
	156	#define release_mem_region(start,n) __release_region(&iomem_resource, (start), (n))
	157
	158	extern int __check_region(struct resource *, resource_size_t, resource_size_t);
	159	extern void __release_region(struct resource *, resource_size_t,
	160	resource_size_t);
	161
	162	static inline int __deprecated check_region(resource_size_t s,
	163	resource_size_t n)
	164	{
	165	return __check_region(&ioport_resource, s, n);
	166	}
	167
	168	/* Wrappers for managed devices */
	169	struct device;
	170	#define devm_request_region(dev,start,n,name) \
	171	__devm_request_region(dev, &ioport_resource, (start), (n), (name))
	172	#define devm_request_mem_region(dev,start,n,name) \
	173	__devm_request_region(dev, &iomem_resource, (start), (n), (name))
	174
	175	extern struct resource * __devm_request_region(struct device *dev,
	176	struct resource *parent, resource_size_t start,
	177	resource_size_t n, const char *name);
	178
	179	#define devm_release_region(dev, start, n) \
	180	__devm_release_region(dev, &ioport_resource, (start), (n))
	181	#define devm_release_mem_region(dev, start, n) \
	182	__devm_release_region(dev, &iomem_resource, (start), (n))
	183
	184	extern void __devm_release_region(struct device dev, struct resource parent,
	185	resource_size_t start, resource_size_t n);
	186	extern int iomem_map_sanity_check(resource_size_t addr, unsigned long size);
	187	extern int iomem_is_exclusive(u64 addr);
	188
	189	extern int
	190	walk_system_ram_range(unsigned long start_pfn, unsigned long nr_pages,
	191	void arg, int (func)(unsigned long, unsigned long, void *));
	192
	193	#endif /* __ASSEMBLY__ */
	194	#endif /* _LINUX_IOPORT_H */