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Diffstat (limited to '')
| -rw-r--r-- | lib/access.c | 270 |
1 files changed, 270 insertions, 0 deletions
diff --git a/lib/access.c b/lib/access.c new file mode 100644 index 0000000..7d66123 --- /dev/null +++ b/lib/access.c @@ -0,0 +1,270 @@ +/* + * The PCI Library -- User Access + * + * Copyright (c) 1997--2022 Martin Mares <mj@ucw.cz> + * + * Can be freely distributed and used under the terms of the GNU GPL v2+. + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#include <stdio.h> +#include <stdlib.h> +#include <stdarg.h> +#include <string.h> + +#include "internal.h" + +void +pci_scan_bus(struct pci_access *a) +{ + a->methods->scan(a); +} + +struct pci_dev * +pci_alloc_dev(struct pci_access *a) +{ + struct pci_dev *d = pci_malloc(a, sizeof(struct pci_dev)); + + memset(d, 0, sizeof(*d)); + d->access = a; + d->methods = a->methods; + d->hdrtype = -1; + d->numa_node = -1; + if (d->methods->init_dev) + d->methods->init_dev(d); + return d; +} + +int +pci_link_dev(struct pci_access *a, struct pci_dev *d) +{ + d->next = a->devices; + a->devices = d; + + /* + * Applications compiled with older versions of libpci do not expect + * 32-bit domain numbers. To keep them working, we keep a 16-bit + * version of the domain number at the previous location in struct + * pci_dev. This will keep backward compatibility on systems which + * don't require large domain numbers. + */ + if (d->domain > 0xffff) + d->domain_16 = 0xffff; + else + d->domain_16 = d->domain; + + return 1; +} + +struct pci_dev * +pci_get_dev(struct pci_access *a, int domain, int bus, int dev, int func) +{ + struct pci_dev *d = pci_alloc_dev(a); + + d->domain = domain; + d->bus = bus; + d->dev = dev; + d->func = func; + return d; +} + +static void +pci_free_properties(struct pci_dev *d) +{ + struct pci_property *p; + + while (p = d->properties) + { + d->properties = p->next; + pci_mfree(p); + } +} + +void pci_free_dev(struct pci_dev *d) +{ + if (d->methods->cleanup_dev) + d->methods->cleanup_dev(d); + + pci_free_caps(d); + pci_free_properties(d); + pci_mfree(d); +} + +static inline void +pci_read_data(struct pci_dev *d, void *buf, int pos, int len) +{ + if (pos & (len-1)) + d->access->error("Unaligned read: pos=%02x, len=%d", pos, len); + if (pos + len <= d->cache_len) + memcpy(buf, d->cache + pos, len); + else if (!d->methods->read(d, pos, buf, len)) + memset(buf, 0xff, len); +} + +byte +pci_read_byte(struct pci_dev *d, int pos) +{ + byte buf; + pci_read_data(d, &buf, pos, 1); + return buf; +} + +word +pci_read_word(struct pci_dev *d, int pos) +{ + word buf; + pci_read_data(d, &buf, pos, 2); + return le16_to_cpu(buf); +} + +u32 +pci_read_long(struct pci_dev *d, int pos) +{ + u32 buf; + pci_read_data(d, &buf, pos, 4); + return le32_to_cpu(buf); +} + +int +pci_read_block(struct pci_dev *d, int pos, byte *buf, int len) +{ + return d->methods->read(d, pos, buf, len); +} + +int +pci_read_vpd(struct pci_dev *d, int pos, byte *buf, int len) +{ + return d->methods->read_vpd ? d->methods->read_vpd(d, pos, buf, len) : 0; +} + +static inline int +pci_write_data(struct pci_dev *d, void *buf, int pos, int len) +{ + if (pos & (len-1)) + d->access->error("Unaligned write: pos=%02x,len=%d", pos, len); + if (pos + len <= d->cache_len) + memcpy(d->cache + pos, buf, len); + return d->methods->write(d, pos, buf, len); +} + +int +pci_write_byte(struct pci_dev *d, int pos, byte data) +{ + return pci_write_data(d, &data, pos, 1); +} + +int +pci_write_word(struct pci_dev *d, int pos, word data) +{ + word buf = cpu_to_le16(data); + return pci_write_data(d, &buf, pos, 2); +} + +int +pci_write_long(struct pci_dev *d, int pos, u32 data) +{ + u32 buf = cpu_to_le32(data); + return pci_write_data(d, &buf, pos, 4); +} + +int +pci_write_block(struct pci_dev *d, int pos, byte *buf, int len) +{ + if (pos < d->cache_len) + { + int l = (pos + len >= d->cache_len) ? (d->cache_len - pos) : len; + memcpy(d->cache + pos, buf, l); + } + return d->methods->write(d, pos, buf, len); +} + +static void +pci_reset_properties(struct pci_dev *d) +{ + d->known_fields = 0; + d->phy_slot = NULL; + d->module_alias = NULL; + d->label = NULL; + pci_free_caps(d); + pci_free_properties(d); +} + +int +pci_fill_info_v38(struct pci_dev *d, int flags) +{ + unsigned int uflags = flags; + if (uflags & PCI_FILL_RESCAN) + { + uflags &= ~PCI_FILL_RESCAN; + pci_reset_properties(d); + } + if (uflags & ~d->known_fields) + d->methods->fill_info(d, uflags); + return d->known_fields; +} + +/* In version 3.1, pci_fill_info got new flags => versioned alias */ +/* In versions 3.2, 3.3, 3.4, 3.5 and 3.8, the same has happened */ +STATIC_ALIAS(int pci_fill_info(struct pci_dev *d, int flags), pci_fill_info_v38(d, flags)); +DEFINE_ALIAS(int pci_fill_info_v30(struct pci_dev *d, int flags), pci_fill_info_v38); +DEFINE_ALIAS(int pci_fill_info_v31(struct pci_dev *d, int flags), pci_fill_info_v38); +DEFINE_ALIAS(int pci_fill_info_v32(struct pci_dev *d, int flags), pci_fill_info_v38); +DEFINE_ALIAS(int pci_fill_info_v33(struct pci_dev *d, int flags), pci_fill_info_v38); +DEFINE_ALIAS(int pci_fill_info_v34(struct pci_dev *d, int flags), pci_fill_info_v38); +DEFINE_ALIAS(int pci_fill_info_v35(struct pci_dev *d, int flags), pci_fill_info_v38); +SYMBOL_VERSION(pci_fill_info_v30, pci_fill_info@LIBPCI_3.0); +SYMBOL_VERSION(pci_fill_info_v31, pci_fill_info@LIBPCI_3.1); +SYMBOL_VERSION(pci_fill_info_v32, pci_fill_info@LIBPCI_3.2); +SYMBOL_VERSION(pci_fill_info_v33, pci_fill_info@LIBPCI_3.3); +SYMBOL_VERSION(pci_fill_info_v34, pci_fill_info@LIBPCI_3.4); +SYMBOL_VERSION(pci_fill_info_v35, pci_fill_info@LIBPCI_3.5); +SYMBOL_VERSION(pci_fill_info_v38, pci_fill_info@@LIBPCI_3.8); + +void +pci_setup_cache(struct pci_dev *d, byte *cache, int len) +{ + d->cache = cache; + d->cache_len = len; +} + +char * +pci_set_property(struct pci_dev *d, u32 key, char *value) +{ + struct pci_property *p; + struct pci_property **pp = &d->properties; + + while (p = *pp) + { + if (p->key == key) + { + *pp = p->next; + pci_mfree(p); + } + else + pp = &p->next; + } + + if (!value) + return NULL; + + p = pci_malloc(d->access, sizeof(*p) + strlen(value)); + *pp = p; + p->next = NULL; + p->key = key; + strcpy(p->value, value); + + return p->value; +} + +char * +pci_get_string_property(struct pci_dev *d, u32 prop) +{ + struct pci_property *p; + + for (p = d->properties; p; p = p->next) + if (p->key == prop) + return p->value; + + return NULL; +} |