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Diffstat (limited to '')
| -rw-r--r-- | lib/names.c | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/lib/names.c b/lib/names.c new file mode 100644 index 0000000..a287cb0 --- /dev/null +++ b/lib/names.c @@ -0,0 +1,229 @@ +/* + * The PCI Library -- ID to Name Translation + * + * Copyright (c) 1997--2014 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 <stdarg.h> +#include <string.h> + +#include "internal.h" +#include "names.h" + +static char *id_lookup(struct pci_access *a, int flags, int cat, int id1, int id2, int id3, int id4) +{ + char *name; + int tried_hwdb = 0; + + while (!(name = pci_id_lookup(a, flags, cat, id1, id2, id3, id4))) + { + if ((flags & PCI_LOOKUP_CACHE) && !a->id_cache_status) + { + if (pci_id_cache_load(a, flags)) + continue; + } + if (!tried_hwdb && !(flags & (PCI_LOOKUP_SKIP_LOCAL | PCI_LOOKUP_NO_HWDB))) + { + tried_hwdb = 1; + if (name = pci_id_hwdb_lookup(a, cat, id1, id2, id3, id4)) + { + pci_id_insert(a, cat, id1, id2, id3, id4, name, SRC_HWDB); + pci_mfree(name); + continue; + } + } + if (flags & PCI_LOOKUP_NETWORK) + { + if (name = pci_id_net_lookup(a, cat, id1, id2, id3, id4)) + { + pci_id_insert(a, cat, id1, id2, id3, id4, name, SRC_NET); + pci_mfree(name); + pci_id_cache_dirty(a); + } + else + pci_id_insert(a, cat, id1, id2, id3, id4, "", SRC_NET); + /* We want to iterate the lookup to get the allocated ID entry from the hash */ + continue; + } + return NULL; + } + return (name[0] ? name : NULL); +} + +static char * +id_lookup_subsys(struct pci_access *a, int flags, int iv, int id, int isv, int isd) +{ + char *d = NULL; + if (iv > 0 && id > 0) /* Per-device lookup */ + d = id_lookup(a, flags, ID_SUBSYSTEM, iv, id, isv, isd); + if (!d) /* Generic lookup */ + d = id_lookup(a, flags, ID_GEN_SUBSYSTEM, isv, isd, 0, 0); + if (!d && iv == isv && id == isd) /* Check for subsystem == device */ + d = id_lookup(a, flags, ID_DEVICE, iv, id, 0, 0); + return d; +} + +static char * +format_name(char *buf, int size, int flags, char *name, char *num, char *unknown) +{ + int res; + if ((flags & PCI_LOOKUP_NO_NUMBERS) && !name) + return NULL; + else if (flags & PCI_LOOKUP_NUMERIC) + res = snprintf(buf, size, "%s", num); + else if (!name) + res = snprintf(buf, size, ((flags & PCI_LOOKUP_MIXED) ? "%s [%s]" : "%s %s"), unknown, num); + else if (!(flags & PCI_LOOKUP_MIXED)) + res = snprintf(buf, size, "%s", name); + else + res = snprintf(buf, size, "%s [%s]", name, num); + if (res >= size && size >= 4) + buf[size-2] = buf[size-3] = buf[size-4] = '.'; + else if (res < 0 || res >= size) + return "<pci_lookup_name: buffer too small>"; + return buf; +} + +static char * +format_name_pair(char *buf, int size, int flags, char *v, char *d, char *num) +{ + int res; + if ((flags & PCI_LOOKUP_NO_NUMBERS) && (!v || !d)) + return NULL; + if (flags & PCI_LOOKUP_NUMERIC) + res = snprintf(buf, size, "%s", num); + else if (flags & PCI_LOOKUP_MIXED) + { + if (v && d) + res = snprintf(buf, size, "%s %s [%s]", v, d, num); + else if (!v) + res = snprintf(buf, size, "Device [%s]", num); + else /* v && !d */ + res = snprintf(buf, size, "%s Device [%s]", v, num); + } + else + { + if (v && d) + res = snprintf(buf, size, "%s %s", v, d); + else if (!v) + res = snprintf(buf, size, "Device %s", num); + else /* v && !d */ + res = snprintf(buf, size, "%s Device %s", v, num+5); + } + if (res >= size && size >= 4) + buf[size-2] = buf[size-3] = buf[size-4] = '.'; + else if (res < 0 || res >= size) + return "<pci_lookup_name: buffer too small>"; + return buf; +} + +char * +pci_lookup_name(struct pci_access *a, char *buf, int size, int flags, ...) +{ + va_list args; + char *v, *d, *cls, *pif; + int iv, id, isv, isd, icls, ipif; + char numbuf[16], pifbuf[32]; + + va_start(args, flags); + + flags |= a->id_lookup_mode; + if (!(flags & PCI_LOOKUP_NO_NUMBERS)) + { + if (a->numeric_ids > 1) + flags |= PCI_LOOKUP_MIXED; + else if (a->numeric_ids) + flags |= PCI_LOOKUP_NUMERIC; + } + if (flags & PCI_LOOKUP_MIXED) + flags &= ~PCI_LOOKUP_NUMERIC; + + if (!a->id_load_attempted && !(flags & (PCI_LOOKUP_NUMERIC | PCI_LOOKUP_SKIP_LOCAL))) + pci_load_name_list(a); + + switch (flags & 0xffff) + { + case PCI_LOOKUP_VENDOR: + iv = va_arg(args, int); + sprintf(numbuf, "%04x", iv); + va_end(args); + return format_name(buf, size, flags, id_lookup(a, flags, ID_VENDOR, iv, 0, 0, 0), numbuf, "Vendor"); + case PCI_LOOKUP_DEVICE: + iv = va_arg(args, int); + id = va_arg(args, int); + sprintf(numbuf, "%04x", id); + va_end(args); + return format_name(buf, size, flags, id_lookup(a, flags, ID_DEVICE, iv, id, 0, 0), numbuf, "Device"); + case PCI_LOOKUP_VENDOR | PCI_LOOKUP_DEVICE: + iv = va_arg(args, int); + id = va_arg(args, int); + sprintf(numbuf, "%04x:%04x", iv, id); + v = id_lookup(a, flags, ID_VENDOR, iv, 0, 0, 0); + d = id_lookup(a, flags, ID_DEVICE, iv, id, 0, 0); + va_end(args); + return format_name_pair(buf, size, flags, v, d, numbuf); + case PCI_LOOKUP_SUBSYSTEM | PCI_LOOKUP_VENDOR: + isv = va_arg(args, int); + sprintf(numbuf, "%04x", isv); + v = id_lookup(a, flags, ID_VENDOR, isv, 0, 0, 0); + va_end(args); + return format_name(buf, size, flags, v, numbuf, "Unknown vendor"); + case PCI_LOOKUP_SUBSYSTEM | PCI_LOOKUP_DEVICE: + iv = va_arg(args, int); + id = va_arg(args, int); + isv = va_arg(args, int); + isd = va_arg(args, int); + sprintf(numbuf, "%04x", isd); + va_end(args); + return format_name(buf, size, flags, id_lookup_subsys(a, flags, iv, id, isv, isd), numbuf, "Device"); + case PCI_LOOKUP_VENDOR | PCI_LOOKUP_DEVICE | PCI_LOOKUP_SUBSYSTEM: + iv = va_arg(args, int); + id = va_arg(args, int); + isv = va_arg(args, int); + isd = va_arg(args, int); + v = id_lookup(a, flags, ID_VENDOR, isv, 0, 0, 0); + d = id_lookup_subsys(a, flags, iv, id, isv, isd); + sprintf(numbuf, "%04x:%04x", isv, isd); + va_end(args); + return format_name_pair(buf, size, flags, v, d, numbuf); + case PCI_LOOKUP_CLASS: + icls = va_arg(args, int); + sprintf(numbuf, "%04x", icls); + cls = id_lookup(a, flags, ID_SUBCLASS, icls >> 8, icls & 0xff, 0, 0); + if (!cls && (cls = id_lookup(a, flags, ID_CLASS, icls >> 8, 0, 0, 0))) + { + if (!(flags & PCI_LOOKUP_NUMERIC)) /* Include full class number */ + flags |= PCI_LOOKUP_MIXED; + } + va_end(args); + return format_name(buf, size, flags, cls, numbuf, "Class"); + case PCI_LOOKUP_PROGIF: + icls = va_arg(args, int); + ipif = va_arg(args, int); + sprintf(numbuf, "%02x", ipif); + pif = id_lookup(a, flags, ID_PROGIF, icls >> 8, icls & 0xff, ipif, 0); + if (!pif && icls == 0x0101 && !(ipif & 0x70)) + { + /* IDE controllers have complex prog-if semantics */ + sprintf(pifbuf, "%s%s%s%s%s", + (ipif & 0x80) ? " Master" : "", + (ipif & 0x08) ? " SecP" : "", + (ipif & 0x04) ? " SecO" : "", + (ipif & 0x02) ? " PriP" : "", + (ipif & 0x01) ? " PriO" : ""); + pif = pifbuf; + if (*pif) + pif++; + } + va_end(args); + return format_name(buf, size, flags, pif, numbuf, "ProgIf"); + default: + va_end(args); + return "<pci_lookup_name: invalid request>"; + } +} |