diff options
Diffstat (limited to 'lib/init.c')
| -rw-r--r-- | lib/init.c | 340 |
1 files changed, 340 insertions, 0 deletions
diff --git a/lib/init.c b/lib/init.c new file mode 100644 index 0000000..e6efb8b --- /dev/null +++ b/lib/init.c @@ -0,0 +1,340 @@ +/* + * The PCI Library -- Initialization and related things + * + * Copyright (c) 1997--2018 Martin Mares <mj@ucw.cz> + * + * Can be freely distributed and used under the terms of the GNU GPL. + */ + +#include <stdio.h> +#include <stdlib.h> +#include <stdarg.h> +#include <string.h> + +#include "internal.h" + +#ifdef PCI_OS_WINDOWS +#include <windows.h> +#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; i<PCI_ACCESS_MAX; i++) + if (pci_methods[i] && !strcmp(pci_methods[i]->name, 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; i<PCI_ACCESS_MAX; i++) + if (pci_methods[i] && pci_methods[i]->config) + 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); +} |