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 */ 18struct 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 26struct 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 0x00001f00 /* Resource type */ 38#define IORESOURCE_IO 0x00000100 39#define IORESOURCE_MEM 0x00000200 40#define IORESOURCE_IRQ 0x00000400 41#define IORESOURCE_DMA 0x00000800 42#define IORESOURCE_BUS 0x00001000 43 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 49 50#define IORESOURCE_SIZEALIGN 0x00040000 /* size indicates alignment */ 51#define IORESOURCE_STARTALIGN 0x00080000 /* start field is alignment */ 52 53#define IORESOURCE_MEM_64 0x00100000 54#define IORESOURCE_WINDOW 0x00200000 /* forwarded by bridge */ 55#define IORESOURCE_MUXED 0x00400000 /* Resource is software muxed */ 56 57#define IORESOURCE_EXCLUSIVE 0x08000000 /* Userland may not map this resource */ 58#define IORESOURCE_DISABLED 0x10000000 59#define IORESOURCE_UNSET 0x20000000 60#define IORESOURCE_AUTO 0x40000000 61#define IORESOURCE_BUSY 0x80000000 /* Driver has marked this resource busy */ 62 63/* PnP IRQ specific bits (IORESOURCE_BITS) */ 64#define IORESOURCE_IRQ_HIGHEDGE (1<<0) 65#define IORESOURCE_IRQ_LOWEDGE (1<<1) 66#define IORESOURCE_IRQ_HIGHLEVEL (1<<2) 67#define IORESOURCE_IRQ_LOWLEVEL (1<<3) 68#define IORESOURCE_IRQ_SHAREABLE (1<<4) 69#define IORESOURCE_IRQ_OPTIONAL (1<<5) 70 71/* PnP DMA specific bits (IORESOURCE_BITS) */ 72#define IORESOURCE_DMA_TYPE_MASK (3<<0) 73#define IORESOURCE_DMA_8BIT (0<<0) 74#define IORESOURCE_DMA_8AND16BIT (1<<0) 75#define IORESOURCE_DMA_16BIT (2<<0) 76 77#define IORESOURCE_DMA_MASTER (1<<2) 78#define IORESOURCE_DMA_BYTE (1<<3) 79#define IORESOURCE_DMA_WORD (1<<4) 80 81#define IORESOURCE_DMA_SPEED_MASK (3<<6) 82#define IORESOURCE_DMA_COMPATIBLE (0<<6) 83#define IORESOURCE_DMA_TYPEA (1<<6) 84#define IORESOURCE_DMA_TYPEB (2<<6) 85#define IORESOURCE_DMA_TYPEF (3<<6) 86 87/* PnP memory I/O specific bits (IORESOURCE_BITS) */ 88#define IORESOURCE_MEM_WRITEABLE (1<<0) /* dup: IORESOURCE_READONLY */ 89#define IORESOURCE_MEM_CACHEABLE (1<<1) /* dup: IORESOURCE_CACHEABLE */ 90#define IORESOURCE_MEM_RANGELENGTH (1<<2) /* dup: IORESOURCE_RANGELENGTH */ 91#define IORESOURCE_MEM_TYPE_MASK (3<<3) 92#define IORESOURCE_MEM_8BIT (0<<3) 93#define IORESOURCE_MEM_16BIT (1<<3) 94#define IORESOURCE_MEM_8AND16BIT (2<<3) 95#define IORESOURCE_MEM_32BIT (3<<3) 96#define IORESOURCE_MEM_SHADOWABLE (1<<5) /* dup: IORESOURCE_SHADOWABLE */ 97#define IORESOURCE_MEM_EXPANSIONROM (1<<6) 98 99/* PnP I/O specific bits (IORESOURCE_BITS) */ 100#define IORESOURCE_IO_16BIT_ADDR (1<<0) 101#define IORESOURCE_IO_FIXED (1<<1) 102 103/* PCI ROM control bits (IORESOURCE_BITS) */ 104#define IORESOURCE_ROM_ENABLE (1<<0) /* ROM is enabled, same as PCI_ROM_ADDRESS_ENABLE */ 105#define IORESOURCE_ROM_SHADOW (1<<1) /* ROM is copy at C000:0 */ 106#define IORESOURCE_ROM_COPY (1<<2) /* ROM is alloc'd copy, resource field overlaid */ 107#define IORESOURCE_ROM_BIOS_COPY (1<<3) /* ROM is BIOS copy, resource field overlaid */ 108 109/* PCI control bits. Shares IORESOURCE_BITS with above PCI ROM. */ 110#define IORESOURCE_PCI_FIXED (1<<4) /* Do not move resource */ 111 112/* PC/ISA/whatever - the normal PC address spaces: IO and memory */ 113extern struct resource ioport_resource; 114extern struct resource iomem_resource; 115 116extern struct resource *request_resource_conflict(struct resource *root, struct resource *new); 117extern int request_resource(struct resource *root, struct resource *new); 118extern int release_resource(struct resource *new); 119void release_child_resources(struct resource *new); 120extern void reserve_region_with_split(struct resource *root, 121 resource_size_t start, resource_size_t end, 122 const char *name); 123extern struct resource *insert_resource_conflict(struct resource *parent, struct resource *new); 124extern int insert_resource(struct resource *parent, struct resource *new); 125extern void insert_resource_expand_to_fit(struct resource *root, struct resource *new); 126extern int allocate_resource(struct resource *root, struct resource *new, 127 resource_size_t size, resource_size_t min, 128 resource_size_t max, resource_size_t align, 129 resource_size_t (*alignf)(void *, 130 const struct resource *, 131 resource_size_t, 132 resource_size_t), 133 void *alignf_data); 134int adjust_resource(struct resource *res, resource_size_t start, 135 resource_size_t size); 136resource_size_t resource_alignment(struct resource *res); 137static inline resource_size_t resource_size(const struct resource *res) 138{ 139 return res->end - res->start + 1; 140} 141static inline unsigned long resource_type(const struct resource *res) 142{ 143 return res->flags & IORESOURCE_TYPE_BITS; 144} 145 146/* Convenience shorthand with allocation */ 147#define request_region(start,n,name) __request_region(&ioport_resource, (start), (n), (name), 0) 148#define request_muxed_region(start,n,name) __request_region(&ioport_resource, (start), (n), (name), IORESOURCE_MUXED) 149#define __request_mem_region(start,n,name, excl) __request_region(&iomem_resource, (start), (n), (name), excl) 150#define request_mem_region(start,n,name) __request_region(&iomem_resource, (start), (n), (name), 0) 151#define request_mem_region_exclusive(start,n,name) \ 152 __request_region(&iomem_resource, (start), (n), (name), IORESOURCE_EXCLUSIVE) 153#define rename_region(region, newname) do { (region)->name = (newname); } while (0) 154 155extern struct resource * __request_region(struct resource *, 156 resource_size_t start, 157 resource_size_t n, 158 const char *name, int flags); 159 160/* Compatibility cruft */ 161#define release_region(start,n) __release_region(&ioport_resource, (start), (n)) 162#define check_mem_region(start,n) __check_region(&iomem_resource, (start), (n)) 163#define release_mem_region(start,n) __release_region(&iomem_resource, (start), (n)) 164 165extern int __check_region(struct resource *, resource_size_t, resource_size_t); 166extern void __release_region(struct resource *, resource_size_t, 167 resource_size_t); 168 169static inline int __deprecated check_region(resource_size_t s, 170 resource_size_t n) 171{ 172 return __check_region(&ioport_resource, s, n); 173} 174 175/* Wrappers for managed devices */ 176struct device; 177#define devm_request_region(dev,start,n,name) \ 178 __devm_request_region(dev, &ioport_resource, (start), (n), (name)) 179#define devm_request_mem_region(dev,start,n,name) \ 180 __devm_request_region(dev, &iomem_resource, (start), (n), (name)) 181 182extern struct resource * __devm_request_region(struct device *dev, 183 struct resource *parent, resource_size_t start, 184 resource_size_t n, const char *name); 185 186#define devm_release_region(dev, start, n) \ 187 __devm_release_region(dev, &ioport_resource, (start), (n)) 188#define devm_release_mem_region(dev, start, n) \ 189 __devm_release_region(dev, &iomem_resource, (start), (n)) 190 191extern void __devm_release_region(struct device *dev, struct resource *parent, 192 resource_size_t start, resource_size_t n); 193extern int iomem_map_sanity_check(resource_size_t addr, unsigned long size); 194extern int iomem_is_exclusive(u64 addr); 195 196extern int 197walk_system_ram_range(unsigned long start_pfn, unsigned long nr_pages, 198 void *arg, int (*func)(unsigned long, unsigned long, void *)); 199 200#endif /* __ASSEMBLY__ */ 201#endif /* _LINUX_IOPORT_H */ 202