Annotation of embedaddon/pciutils/lib/access.c, revision 1.1.1.1
1.1 misho 1: /*
2: * The PCI Library -- User Access
3: *
4: * Copyright (c) 1997--2008 Martin Mares <mj@ucw.cz>
5: *
6: * Can be freely distributed and used under the terms of the GNU GPL.
7: */
8:
9: #include <stdio.h>
10: #include <stdlib.h>
11: #include <stdarg.h>
12: #include <string.h>
13:
14: #include "internal.h"
15:
16: void
17: pci_scan_bus(struct pci_access *a)
18: {
19: a->methods->scan(a);
20: }
21:
22: struct pci_dev *
23: pci_alloc_dev(struct pci_access *a)
24: {
25: struct pci_dev *d = pci_malloc(a, sizeof(struct pci_dev));
26:
27: memset(d, 0, sizeof(*d));
28: d->access = a;
29: d->methods = a->methods;
30: d->hdrtype = -1;
31: if (d->methods->init_dev)
32: d->methods->init_dev(d);
33: return d;
34: }
35:
36: int
37: pci_link_dev(struct pci_access *a, struct pci_dev *d)
38: {
39: d->next = a->devices;
40: a->devices = d;
41:
42: return 1;
43: }
44:
45: struct pci_dev *
46: pci_get_dev(struct pci_access *a, int domain, int bus, int dev, int func)
47: {
48: struct pci_dev *d = pci_alloc_dev(a);
49:
50: d->domain = domain;
51: d->bus = bus;
52: d->dev = dev;
53: d->func = func;
54: return d;
55: }
56:
57: void pci_free_dev(struct pci_dev *d)
58: {
59: if (d->methods->cleanup_dev)
60: d->methods->cleanup_dev(d);
61: pci_free_caps(d);
62: pci_mfree(d->phy_slot);
63: pci_mfree(d);
64: }
65:
66: static inline void
67: pci_read_data(struct pci_dev *d, void *buf, int pos, int len)
68: {
69: if (pos & (len-1))
70: d->access->error("Unaligned read: pos=%02x, len=%d", pos, len);
71: if (pos + len <= d->cache_len)
72: memcpy(buf, d->cache + pos, len);
73: else if (!d->methods->read(d, pos, buf, len))
74: memset(buf, 0xff, len);
75: }
76:
77: byte
78: pci_read_byte(struct pci_dev *d, int pos)
79: {
80: byte buf;
81: pci_read_data(d, &buf, pos, 1);
82: return buf;
83: }
84:
85: word
86: pci_read_word(struct pci_dev *d, int pos)
87: {
88: word buf;
89: pci_read_data(d, &buf, pos, 2);
90: return le16_to_cpu(buf);
91: }
92:
93: u32
94: pci_read_long(struct pci_dev *d, int pos)
95: {
96: u32 buf;
97: pci_read_data(d, &buf, pos, 4);
98: return le32_to_cpu(buf);
99: }
100:
101: int
102: pci_read_block(struct pci_dev *d, int pos, byte *buf, int len)
103: {
104: return d->methods->read(d, pos, buf, len);
105: }
106:
107: int
108: pci_read_vpd(struct pci_dev *d, int pos, byte *buf, int len)
109: {
110: return d->methods->read_vpd ? d->methods->read_vpd(d, pos, buf, len) : 0;
111: }
112:
113: static inline int
114: pci_write_data(struct pci_dev *d, void *buf, int pos, int len)
115: {
116: if (pos & (len-1))
117: d->access->error("Unaligned write: pos=%02x,len=%d", pos, len);
118: if (pos + len <= d->cache_len)
119: memcpy(d->cache + pos, buf, len);
120: return d->methods->write(d, pos, buf, len);
121: }
122:
123: int
124: pci_write_byte(struct pci_dev *d, int pos, byte data)
125: {
126: return pci_write_data(d, &data, pos, 1);
127: }
128:
129: int
130: pci_write_word(struct pci_dev *d, int pos, word data)
131: {
132: word buf = cpu_to_le16(data);
133: return pci_write_data(d, &buf, pos, 2);
134: }
135:
136: int
137: pci_write_long(struct pci_dev *d, int pos, u32 data)
138: {
139: u32 buf = cpu_to_le32(data);
140: return pci_write_data(d, &buf, pos, 4);
141: }
142:
143: int
144: pci_write_block(struct pci_dev *d, int pos, byte *buf, int len)
145: {
146: if (pos < d->cache_len)
147: {
148: int l = (pos + len >= d->cache_len) ? (d->cache_len - pos) : len;
149: memcpy(d->cache + pos, buf, l);
150: }
151: return d->methods->write(d, pos, buf, len);
152: }
153:
154: int
155: pci_fill_info_v31(struct pci_dev *d, int flags)
156: {
157: if (flags & PCI_FILL_RESCAN)
158: {
159: flags &= ~PCI_FILL_RESCAN;
160: d->known_fields = 0;
161: pci_free_caps(d);
162: }
163: if (flags & ~d->known_fields)
164: d->known_fields |= d->methods->fill_info(d, flags & ~d->known_fields);
165: return d->known_fields;
166: }
167:
168: /* In version 3.1, pci_fill_info got new flags => versioned alias */
169: STATIC_ALIAS(int pci_fill_info(struct pci_dev *d, int flags), pci_fill_info_v31(d,flags));
170: DEFINE_ALIAS(int pci_fill_info_v30(struct pci_dev *d, int flags), pci_fill_info_v31);
171: SYMBOL_VERSION(pci_fill_info_v30, pci_fill_info@LIBPCI_3.0);
172: SYMBOL_VERSION(pci_fill_info_v31, pci_fill_info@@LIBPCI_3.1);
173:
174: void
175: pci_setup_cache(struct pci_dev *d, byte *cache, int len)
176: {
177: d->cache = cache;
178: d->cache_len = len;
179: }
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