1
2
3
4
5
6
7
8
9#ifndef _LINUX_IOPORT_H
10#define _LINUX_IOPORT_H
11
12#ifndef __ASSEMBLY__
13#include <linux/bits.h>
14#include <linux/compiler.h>
15#include <linux/minmax.h>
16#include <linux/types.h>
17
18
19
20
21struct resource {
22 resource_size_t start;
23 resource_size_t end;
24 const char *name;
25 unsigned long flags;
26 unsigned long desc;
27 struct resource *parent, *sibling, *child;
28};
29
30
31
32
33
34
35
36#define IORESOURCE_BITS 0x000000ff
37
38#define IORESOURCE_TYPE_BITS 0x00001f00
39#define IORESOURCE_IO 0x00000100
40#define IORESOURCE_MEM 0x00000200
41#define IORESOURCE_REG 0x00000300
42#define IORESOURCE_IRQ 0x00000400
43#define IORESOURCE_DMA 0x00000800
44#define IORESOURCE_BUS 0x00001000
45
46#define IORESOURCE_PREFETCH 0x00002000
47#define IORESOURCE_READONLY 0x00004000
48#define IORESOURCE_CACHEABLE 0x00008000
49#define IORESOURCE_RANGELENGTH 0x00010000
50#define IORESOURCE_SHADOWABLE 0x00020000
51
52#define IORESOURCE_SIZEALIGN 0x00040000
53#define IORESOURCE_STARTALIGN 0x00080000
54
55#define IORESOURCE_MEM_64 0x00100000
56#define IORESOURCE_WINDOW 0x00200000
57#define IORESOURCE_MUXED 0x00400000
58
59#define IORESOURCE_EXT_TYPE_BITS 0x01000000
60#define IORESOURCE_SYSRAM 0x01000000
61
62
63#define IORESOURCE_SYSRAM_DRIVER_MANAGED 0x02000000
64#define IORESOURCE_SYSRAM_MERGEABLE 0x04000000
65
66#define IORESOURCE_EXCLUSIVE 0x08000000
67
68#define IORESOURCE_DISABLED 0x10000000
69#define IORESOURCE_UNSET 0x20000000
70#define IORESOURCE_AUTO 0x40000000
71#define IORESOURCE_BUSY 0x80000000
72
73
74#define IORESOURCE_SYSTEM_RAM (IORESOURCE_MEM|IORESOURCE_SYSRAM)
75
76
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)
81#define IORESOURCE_IRQ_SHAREABLE (1<<4)
82#define IORESOURCE_IRQ_OPTIONAL (1<<5)
83
84
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
100
101#define IORESOURCE_MEM_WRITEABLE (1<<0)
102#define IORESOURCE_MEM_CACHEABLE (1<<1)
103#define IORESOURCE_MEM_RANGELENGTH (1<<2)
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)
110#define IORESOURCE_MEM_EXPANSIONROM (1<<6)
111#define IORESOURCE_MEM_NONPOSTED (1<<7)
112
113
114#define IORESOURCE_IO_16BIT_ADDR (1<<0)
115#define IORESOURCE_IO_FIXED (1<<1)
116#define IORESOURCE_IO_SPARSE (1<<2)
117
118
119#define IORESOURCE_ROM_ENABLE (1<<0)
120#define IORESOURCE_ROM_SHADOW (1<<1)
121
122
123#define IORESOURCE_PCI_FIXED (1<<4)
124#define IORESOURCE_PCI_EA_BEI (1<<5)
125
126
127
128
129
130
131
132
133
134enum {
135 IORES_DESC_NONE = 0,
136 IORES_DESC_CRASH_KERNEL = 1,
137 IORES_DESC_ACPI_TABLES = 2,
138 IORES_DESC_ACPI_NV_STORAGE = 3,
139 IORES_DESC_PERSISTENT_MEMORY = 4,
140 IORES_DESC_PERSISTENT_MEMORY_LEGACY = 5,
141 IORES_DESC_DEVICE_PRIVATE_MEMORY = 6,
142 IORES_DESC_RESERVED = 7,
143 IORES_DESC_SOFT_RESERVED = 8,
144};
145
146
147
148
149enum {
150 IORES_MAP_SYSTEM_RAM = BIT(0),
151 IORES_MAP_ENCRYPTED = BIT(1),
152};
153
154
155#define DEFINE_RES_NAMED(_start, _size, _name, _flags) \
156 { \
157 .start = (_start), \
158 .end = (_start) + (_size) - 1, \
159 .name = (_name), \
160 .flags = (_flags), \
161 .desc = IORES_DESC_NONE, \
162 }
163
164#define DEFINE_RES_IO_NAMED(_start, _size, _name) \
165 DEFINE_RES_NAMED((_start), (_size), (_name), IORESOURCE_IO)
166#define DEFINE_RES_IO(_start, _size) \
167 DEFINE_RES_IO_NAMED((_start), (_size), NULL)
168
169#define DEFINE_RES_MEM_NAMED(_start, _size, _name) \
170 DEFINE_RES_NAMED((_start), (_size), (_name), IORESOURCE_MEM)
171#define DEFINE_RES_MEM(_start, _size) \
172 DEFINE_RES_MEM_NAMED((_start), (_size), NULL)
173
174#define DEFINE_RES_IRQ_NAMED(_irq, _name) \
175 DEFINE_RES_NAMED((_irq), 1, (_name), IORESOURCE_IRQ)
176#define DEFINE_RES_IRQ(_irq) \
177 DEFINE_RES_IRQ_NAMED((_irq), NULL)
178
179#define DEFINE_RES_DMA_NAMED(_dma, _name) \
180 DEFINE_RES_NAMED((_dma), 1, (_name), IORESOURCE_DMA)
181#define DEFINE_RES_DMA(_dma) \
182 DEFINE_RES_DMA_NAMED((_dma), NULL)
183
184
185extern struct resource ioport_resource;
186extern struct resource iomem_resource;
187
188extern struct resource *request_resource_conflict(struct resource *root, struct resource *new);
189extern int request_resource(struct resource *root, struct resource *new);
190extern int release_resource(struct resource *new);
191void release_child_resources(struct resource *new);
192extern void reserve_region_with_split(struct resource *root,
193 resource_size_t start, resource_size_t end,
194 const char *name);
195extern struct resource *insert_resource_conflict(struct resource *parent, struct resource *new);
196extern int insert_resource(struct resource *parent, struct resource *new);
197extern void insert_resource_expand_to_fit(struct resource *root, struct resource *new);
198extern int remove_resource(struct resource *old);
199extern void arch_remove_reservations(struct resource *avail);
200extern int allocate_resource(struct resource *root, struct resource *new,
201 resource_size_t size, resource_size_t min,
202 resource_size_t max, resource_size_t align,
203 resource_size_t (*alignf)(void *,
204 const struct resource *,
205 resource_size_t,
206 resource_size_t),
207 void *alignf_data);
208struct resource *lookup_resource(struct resource *root, resource_size_t start);
209int adjust_resource(struct resource *res, resource_size_t start,
210 resource_size_t size);
211resource_size_t resource_alignment(struct resource *res);
212static inline resource_size_t resource_size(const struct resource *res)
213{
214 return res->end - res->start + 1;
215}
216static inline unsigned long resource_type(const struct resource *res)
217{
218 return res->flags & IORESOURCE_TYPE_BITS;
219}
220static inline unsigned long resource_ext_type(const struct resource *res)
221{
222 return res->flags & IORESOURCE_EXT_TYPE_BITS;
223}
224
225static inline bool resource_contains(struct resource *r1, struct resource *r2)
226{
227 if (resource_type(r1) != resource_type(r2))
228 return false;
229 if (r1->flags & IORESOURCE_UNSET || r2->flags & IORESOURCE_UNSET)
230 return false;
231 return r1->start <= r2->start && r1->end >= r2->end;
232}
233
234
235static inline bool resource_overlaps(struct resource *r1, struct resource *r2)
236{
237 return r1->start <= r2->end && r1->end >= r2->start;
238}
239
240static inline bool
241resource_intersection(struct resource *r1, struct resource *r2, struct resource *r)
242{
243 if (!resource_overlaps(r1, r2))
244 return false;
245 r->start = max(r1->start, r2->start);
246 r->end = min(r1->end, r2->end);
247 return true;
248}
249
250static inline bool
251resource_union(struct resource *r1, struct resource *r2, struct resource *r)
252{
253 if (!resource_overlaps(r1, r2))
254 return false;
255 r->start = min(r1->start, r2->start);
256 r->end = max(r1->end, r2->end);
257 return true;
258}
259
260
261#define request_region(start,n,name) __request_region(&ioport_resource, (start), (n), (name), 0)
262#define request_muxed_region(start,n,name) __request_region(&ioport_resource, (start), (n), (name), IORESOURCE_MUXED)
263#define __request_mem_region(start,n,name, excl) __request_region(&iomem_resource, (start), (n), (name), excl)
264#define request_mem_region(start,n,name) __request_region(&iomem_resource, (start), (n), (name), 0)
265#define request_mem_region_exclusive(start,n,name) \
266 __request_region(&iomem_resource, (start), (n), (name), IORESOURCE_EXCLUSIVE)
267#define rename_region(region, newname) do { (region)->name = (newname); } while (0)
268
269extern struct resource * __request_region(struct resource *,
270 resource_size_t start,
271 resource_size_t n,
272 const char *name, int flags);
273
274
275#define release_region(start,n) __release_region(&ioport_resource, (start), (n))
276#define release_mem_region(start,n) __release_region(&iomem_resource, (start), (n))
277
278extern void __release_region(struct resource *, resource_size_t,
279 resource_size_t);
280#ifdef CONFIG_MEMORY_HOTREMOVE
281extern void release_mem_region_adjustable(resource_size_t, resource_size_t);
282#endif
283#ifdef CONFIG_MEMORY_HOTPLUG
284extern void merge_system_ram_resource(struct resource *res);
285#endif
286
287
288struct device;
289
290extern int devm_request_resource(struct device *dev, struct resource *root,
291 struct resource *new);
292extern void devm_release_resource(struct device *dev, struct resource *new);
293
294#define devm_request_region(dev,start,n,name) \
295 __devm_request_region(dev, &ioport_resource, (start), (n), (name))
296#define devm_request_mem_region(dev,start,n,name) \
297 __devm_request_region(dev, &iomem_resource, (start), (n), (name))
298
299extern struct resource * __devm_request_region(struct device *dev,
300 struct resource *parent, resource_size_t start,
301 resource_size_t n, const char *name);
302
303#define devm_release_region(dev, start, n) \
304 __devm_release_region(dev, &ioport_resource, (start), (n))
305#define devm_release_mem_region(dev, start, n) \
306 __devm_release_region(dev, &iomem_resource, (start), (n))
307
308extern void __devm_release_region(struct device *dev, struct resource *parent,
309 resource_size_t start, resource_size_t n);
310extern int iomem_map_sanity_check(resource_size_t addr, unsigned long size);
311extern bool iomem_is_exclusive(u64 addr);
312
313extern int
314walk_system_ram_range(unsigned long start_pfn, unsigned long nr_pages,
315 void *arg, int (*func)(unsigned long, unsigned long, void *));
316extern int
317walk_mem_res(u64 start, u64 end, void *arg,
318 int (*func)(struct resource *, void *));
319extern int
320walk_system_ram_res(u64 start, u64 end, void *arg,
321 int (*func)(struct resource *, void *));
322extern int
323walk_iomem_res_desc(unsigned long desc, unsigned long flags, u64 start, u64 end,
324 void *arg, int (*func)(struct resource *, void *));
325
326struct resource *devm_request_free_mem_region(struct device *dev,
327 struct resource *base, unsigned long size);
328struct resource *request_free_mem_region(struct resource *base,
329 unsigned long size, const char *name);
330
331static inline void irqresource_disabled(struct resource *res, u32 irq)
332{
333 res->start = irq;
334 res->end = irq;
335 res->flags |= IORESOURCE_IRQ | IORESOURCE_DISABLED | IORESOURCE_UNSET;
336}
337
338extern struct address_space *iomem_get_mapping(void);
339
340#endif
341#endif
342