Release 4.12 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;
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,
};
/* 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;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Magnus Damm | 23 | 95.83% | 1 | 50.00% |
| Jean Delvare | 1 | 4.17% | 1 | 50.00% |
| Total | 24 | 100.00% | 2 | 100.00% |
static inline unsigned long resource_type(const struct resource *res)
{
return res->flags & IORESOURCE_TYPE_BITS;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Magnus Damm | 20 | 95.24% | 1 | 50.00% |
| Jean Delvare | 1 | 4.76% | 1 | 50.00% |
| Total | 21 | 100.00% | 2 | 100.00% |
static inline unsigned long resource_ext_type(const struct resource *res)
{
return res->flags & IORESOURCE_EXT_TYPE_BITS;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Toshi Kani | 21 | 100.00% | 1 | 100.00% |
| Total | 21 | 100.00% | 1 | 100.00% |
/* 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;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Björn Helgaas | 66 | 100.00% | 1 | 100.00% |
| Total | 66 | 100.00% | 1 | 100.00% |
/* 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_system_ram_res(u64 start, u64 end, void *arg,
int (*func)(u64, u64, void *));
extern int
walk_iomem_res_desc(unsigned long desc, unsigned long flags, u64 start, u64 end,
void *arg, int (*func)(u64, u64, 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);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Wei Yang | 36 | 100.00% | 1 | 100.00% |
| Total | 36 | 100.00% | 1 | 100.00% |
#endif /* __ASSEMBLY__ */
#endif /* _LINUX_IOPORT_H */
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds (pre-git) | 340 | 26.88% | 15 | 21.43% |
| Björn Helgaas | 150 | 11.86% | 12 | 17.14% |
| Toshi Kani | 116 | 9.17% | 5 | 7.14% |
| Tejun Heo | 101 | 7.98% | 1 | 1.43% |
| Uwe Kleine-König | 94 | 7.43% | 1 | 1.43% |
| Magnus Damm | 48 | 3.79% | 2 | 2.86% |
| Vivek Goyal | 47 | 3.72% | 1 | 1.43% |
| Arjan van de Ven | 42 | 3.32% | 1 | 1.43% |
| Wei Yang | 37 | 2.92% | 1 | 1.43% |
| Thierry Reding | 35 | 2.77% | 1 | 1.43% |
| Yinghai Lu | 33 | 2.61% | 3 | 4.29% |
| Kamezawa Hiroyuki | 33 | 2.61% | 1 | 1.43% |
| Linus Torvalds | 24 | 1.90% | 2 | 2.86% |
| Greg Kroah-Hartman | 21 | 1.66% | 2 | 2.86% |
| Alan Cox | 16 | 1.26% | 1 | 1.43% |
| Ivan Kokshaysky | 16 | 1.26% | 2 | 2.86% |
| Benjamin Herrenschmidt | 15 | 1.19% | 1 | 1.43% |
| Geert Uytterhoeven | 14 | 1.11% | 1 | 1.43% |
| Matthew Wilcox | 13 | 1.03% | 1 | 1.43% |
| Suresh B. Siddha | 12 | 0.95% | 1 | 1.43% |
| Jon Smirl | 10 | 0.79% | 1 | 1.43% |
| Adam Belay | 8 | 0.63% | 2 | 2.86% |
| Ralf Bächle | 6 | 0.47% | 1 | 1.43% |
| Mark Brown | 6 | 0.47% | 2 | 2.86% |
| Alex Williamson | 6 | 0.47% | 1 | 1.43% |
| Bernhard Walle | 6 | 0.47% | 1 | 1.43% |
| Hiroshi Doyu | 4 | 0.32% | 1 | 1.43% |
| Jiang Liu | 4 | 0.32% | 1 | 1.43% |
| William Stinson | 3 | 0.24% | 1 | 1.43% |
| Dominik Brodowski | 2 | 0.16% | 2 | 2.86% |
| Jean Delvare | 2 | 0.16% | 1 | 1.43% |
| Randy Dunlap | 1 | 0.08% | 1 | 1.43% |
| Total | 1265 | 100.00% | 70 | 100.00% |
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