/* * The PCI Library -- Initialization and related things * * Copyright (c) 1997--2018 Martin Mares * * Can be freely distributed and used under the terms of the GNU GPL. */ #include #include #include #include #include "internal.h" #ifdef PCI_OS_WINDOWS #include #endif static struct pci_methods *pci_methods[PCI_ACCESS_MAX] = { NULL, #ifdef PCI_HAVE_PM_LINUX_SYSFS &pm_linux_sysfs, #else NULL, #endif #ifdef PCI_HAVE_PM_LINUX_PROC &pm_linux_proc, #else NULL, #endif #ifdef PCI_HAVE_PM_INTEL_CONF &pm_intel_conf1, &pm_intel_conf2, #else NULL, NULL, #endif #ifdef PCI_HAVE_PM_FBSD_DEVICE &pm_fbsd_device, #else NULL, #endif #ifdef PCI_HAVE_PM_AIX_DEVICE &pm_aix_device, #else NULL, #endif #ifdef PCI_HAVE_PM_NBSD_LIBPCI &pm_nbsd_libpci, #else NULL, #endif #ifdef PCI_HAVE_PM_OBSD_DEVICE &pm_obsd_device, #else NULL, #endif #ifdef PCI_HAVE_PM_DUMP &pm_dump, #else NULL, #endif #ifdef PCI_HAVE_PM_DARWIN_DEVICE &pm_darwin, #else NULL, #endif #ifdef PCI_HAVE_PM_SYLIXOS_DEVICE &pm_sylixos_device, #else NULL, #endif #ifdef PCI_HAVE_PM_HURD_CONF &pm_hurd, #else NULL, #endif #ifdef PCI_HAVE_PM_WIN32_CFGMGR32 &pm_win32_cfgmgr32, #else NULL, #endif #ifdef PCI_HAVE_PM_WIN32_KLDBG &pm_win32_kldbg, #else NULL, #endif #ifdef PCI_HAVE_PM_WIN32_SYSDBG &pm_win32_sysdbg, #else NULL, #endif #ifdef PCI_HAVE_PM_MMIO_CONF &pm_mmio_conf1, &pm_mmio_conf1_ext, #else NULL, NULL, #endif }; // If PCI_ACCESS_AUTO is selected, we probe the access methods in this order static int probe_sequence[] = { // System-specific methods PCI_ACCESS_SYS_BUS_PCI, PCI_ACCESS_PROC_BUS_PCI, PCI_ACCESS_FBSD_DEVICE, PCI_ACCESS_AIX_DEVICE, PCI_ACCESS_NBSD_LIBPCI, PCI_ACCESS_OBSD_DEVICE, PCI_ACCESS_DARWIN, PCI_ACCESS_SYLIXOS_DEVICE, PCI_ACCESS_HURD, PCI_ACCESS_WIN32_CFGMGR32, PCI_ACCESS_WIN32_KLDBG, PCI_ACCESS_WIN32_SYSDBG, // Low-level methods poking the hardware directly PCI_ACCESS_I386_TYPE1, PCI_ACCESS_I386_TYPE2, PCI_ACCESS_MMIO_TYPE1_EXT, PCI_ACCESS_MMIO_TYPE1, -1, }; static void PCI_NONRET pci_generic_error(char *msg, ...) { va_list args; va_start(args, msg); fputs("pcilib: ", stderr); vfprintf(stderr, msg, args); va_end(args); fputc('\n', stderr); exit(1); } static void pci_generic_warn(char *msg, ...) { va_list args; va_start(args, msg); fputs("pcilib: ", stderr); vfprintf(stderr, msg, args); va_end(args); fputc('\n', stderr); } static void pci_generic_debug(char *msg, ...) { va_list args; va_start(args, msg); vfprintf(stdout, msg, args); va_end(args); } static void pci_null_debug(char *msg UNUSED, ...) { } // Memory allocation functions are safe to call if pci_access is not fully initalized or even NULL void * pci_malloc(struct pci_access *a, int size) { void *x = malloc(size); if (!x) (a && a->error ? a->error : pci_generic_error)("Out of memory (allocation of %d bytes failed)", size); return x; } void pci_mfree(void *x) { if (x) free(x); } char * pci_strdup(struct pci_access *a, const char *s) { int len = strlen(s) + 1; char *t = pci_malloc(a, len); memcpy(t, s, len); return t; } int pci_lookup_method(char *name) { int i; for (i=0; iname, name)) return i; return -1; } char * pci_get_method_name(int index) { if (index < 0 || index >= PCI_ACCESS_MAX) return NULL; else if (!pci_methods[index]) return ""; else return pci_methods[index]->name; } #ifdef PCI_OS_WINDOWS static void pci_init_name_list_path(struct pci_access *a) { if ((PCI_PATH_IDS_DIR)[0]) pci_set_name_list_path(a, PCI_PATH_IDS_DIR "\\" PCI_IDS, 0); else { char *path, *sep; DWORD len; path = pci_malloc(a, MAX_PATH+1); len = GetModuleFileNameA(NULL, path, MAX_PATH+1); sep = (len > 0) ? strrchr(path, '\\') : NULL; if (len == 0 || len == MAX_PATH+1 || !sep || MAX_PATH-(size_t)(sep+1-path) < sizeof(PCI_IDS)) { free(path); pci_set_name_list_path(a, PCI_IDS, 0); } else { memcpy(sep+1, PCI_IDS, sizeof(PCI_IDS)); pci_set_name_list_path(a, path, 1); } } } #else static void pci_init_name_list_path(struct pci_access *a) { pci_set_name_list_path(a, PCI_PATH_IDS_DIR "/" PCI_IDS, 0); } #endif struct pci_access * pci_alloc(void) { struct pci_access *a = pci_malloc(NULL, sizeof(struct pci_access)); int i; memset(a, 0, sizeof(*a)); pci_init_name_list_path(a); #ifdef PCI_USE_DNS pci_define_param(a, "net.domain", PCI_ID_DOMAIN, "DNS domain used for resolving of ID's"); pci_define_param(a, "net.cache_name", "~/.pciids-cache", "Name of the ID cache file"); a->id_lookup_mode = PCI_LOOKUP_CACHE; #endif #ifdef PCI_HAVE_HWDB pci_define_param(a, "hwdb.disable", "0", "Do not look up names in UDEV's HWDB if non-zero"); #endif for (i=0; iconfig) pci_methods[i]->config(a); return a; } void pci_init_v35(struct pci_access *a) { if (!a->error) a->error = pci_generic_error; if (!a->warning) a->warning = pci_generic_warn; if (!a->debug) a->debug = pci_generic_debug; if (!a->debugging) a->debug = pci_null_debug; if (a->method) { if (a->method >= PCI_ACCESS_MAX || !pci_methods[a->method]) a->error("This access method is not supported."); a->methods = pci_methods[a->method]; } else { unsigned int i; for (i=0; probe_sequence[i] >= 0; i++) { struct pci_methods *m = pci_methods[probe_sequence[i]]; if (!m) continue; a->debug("Trying method %s...", m->name); if (m->detect(a)) { a->debug("...OK\n"); a->methods = m; a->method = probe_sequence[i]; break; } a->debug("...No.\n"); } if (!a->methods) a->error("Cannot find any working access method."); } a->debug("Decided to use %s\n", a->methods->name); a->methods->init(a); } STATIC_ALIAS(void pci_init(struct pci_access *a), pci_init_v35(a)); DEFINE_ALIAS(void pci_init_v30(struct pci_access *a), pci_init_v35); SYMBOL_VERSION(pci_init_v30, pci_init@LIBPCI_3.0); SYMBOL_VERSION(pci_init_v35, pci_init@@LIBPCI_3.5); void pci_cleanup(struct pci_access *a) { struct pci_dev *d, *e; for (d=a->devices; d; d=e) { e = d->next; pci_free_dev(d); } if (a->methods) a->methods->cleanup(a); pci_free_name_list(a); pci_free_params(a); pci_set_name_list_path(a, NULL, 0); pci_mfree(a); }