2 * The PCI Library -- User Access
4 * Copyright (c) 1997--2014 Martin Mares <mj@ucw.cz>
6 * Can be freely distributed and used under the terms of the GNU GPL.
17 pci_scan_bus(struct pci_access *a)
23 pci_alloc_dev(struct pci_access *a)
25 struct pci_dev *d = pci_malloc(a, sizeof(struct pci_dev));
27 memset(d, 0, sizeof(*d));
29 d->methods = a->methods;
32 if (d->methods->init_dev)
33 d->methods->init_dev(d);
38 pci_link_dev(struct pci_access *a, struct pci_dev *d)
44 * Applications compiled with older versions of libpci do not expect
45 * 32-bit domain numbers. To keep them working, we keep a 16-bit
46 * version of the domain number at the previous location in struct
47 * pci_dev. This will keep backward compatibility on systems which
48 * don't require large domain numbers.
50 if (d->domain > 0xffff)
51 d->domain_16 = 0xffff;
53 d->domain_16 = d->domain;
59 pci_get_dev(struct pci_access *a, int domain, int bus, int dev, int func)
61 struct pci_dev *d = pci_alloc_dev(a);
70 void pci_free_dev(struct pci_dev *d)
72 if (d->methods->cleanup_dev)
73 d->methods->cleanup_dev(d);
75 pci_mfree(d->module_alias);
77 pci_mfree(d->phy_slot);
78 pci_mfree(d->dt_node);
83 pci_read_data(struct pci_dev *d, void *buf, int pos, int len)
86 d->access->error("Unaligned read: pos=%02x, len=%d", pos, len);
87 if (pos + len <= d->cache_len)
88 memcpy(buf, d->cache + pos, len);
89 else if (!d->methods->read(d, pos, buf, len))
90 memset(buf, 0xff, len);
94 pci_read_byte(struct pci_dev *d, int pos)
97 pci_read_data(d, &buf, pos, 1);
102 pci_read_word(struct pci_dev *d, int pos)
105 pci_read_data(d, &buf, pos, 2);
106 return le16_to_cpu(buf);
110 pci_read_long(struct pci_dev *d, int pos)
113 pci_read_data(d, &buf, pos, 4);
114 return le32_to_cpu(buf);
118 pci_read_block(struct pci_dev *d, int pos, byte *buf, int len)
120 return d->methods->read(d, pos, buf, len);
124 pci_read_vpd(struct pci_dev *d, int pos, byte *buf, int len)
126 return d->methods->read_vpd ? d->methods->read_vpd(d, pos, buf, len) : 0;
130 pci_write_data(struct pci_dev *d, void *buf, int pos, int len)
133 d->access->error("Unaligned write: pos=%02x,len=%d", pos, len);
134 if (pos + len <= d->cache_len)
135 memcpy(d->cache + pos, buf, len);
136 return d->methods->write(d, pos, buf, len);
140 pci_write_byte(struct pci_dev *d, int pos, byte data)
142 return pci_write_data(d, &data, pos, 1);
146 pci_write_word(struct pci_dev *d, int pos, word data)
148 word buf = cpu_to_le16(data);
149 return pci_write_data(d, &buf, pos, 2);
153 pci_write_long(struct pci_dev *d, int pos, u32 data)
155 u32 buf = cpu_to_le32(data);
156 return pci_write_data(d, &buf, pos, 4);
160 pci_write_block(struct pci_dev *d, int pos, byte *buf, int len)
162 if (pos < d->cache_len)
164 int l = (pos + len >= d->cache_len) ? (d->cache_len - pos) : len;
165 memcpy(d->cache + pos, buf, l);
167 return d->methods->write(d, pos, buf, len);
171 pci_fill_info_v35(struct pci_dev *d, int flags)
173 if (flags & PCI_FILL_RESCAN)
175 flags &= ~PCI_FILL_RESCAN;
179 if (flags & ~d->known_fields)
180 d->known_fields |= d->methods->fill_info(d, flags & ~d->known_fields);
181 return d->known_fields;
184 /* In version 3.1, pci_fill_info got new flags => versioned alias */
185 /* In versions 3.2, 3.3, 3.4 and 3.5, the same has happened */
186 STATIC_ALIAS(int pci_fill_info(struct pci_dev *d, int flags), pci_fill_info_v35(d, flags));
187 DEFINE_ALIAS(int pci_fill_info_v30(struct pci_dev *d, int flags), pci_fill_info_v35);
188 DEFINE_ALIAS(int pci_fill_info_v31(struct pci_dev *d, int flags), pci_fill_info_v35);
189 DEFINE_ALIAS(int pci_fill_info_v32(struct pci_dev *d, int flags), pci_fill_info_v35);
190 DEFINE_ALIAS(int pci_fill_info_v33(struct pci_dev *d, int flags), pci_fill_info_v35);
191 DEFINE_ALIAS(int pci_fill_info_v34(struct pci_dev *d, int flags), pci_fill_info_v35);
192 SYMBOL_VERSION(pci_fill_info_v30, pci_fill_info@LIBPCI_3.0);
193 SYMBOL_VERSION(pci_fill_info_v31, pci_fill_info@LIBPCI_3.1);
194 SYMBOL_VERSION(pci_fill_info_v32, pci_fill_info@LIBPCI_3.2);
195 SYMBOL_VERSION(pci_fill_info_v33, pci_fill_info@LIBPCI_3.3);
196 SYMBOL_VERSION(pci_fill_info_v34, pci_fill_info@LIBPCI_3.4);
197 SYMBOL_VERSION(pci_fill_info_v35, pci_fill_info@@LIBPCI_3.5);
200 pci_setup_cache(struct pci_dev *d, byte *cache, int len)