/*
* The PCI Library -- Initialization and related things
*
- * Copyright (c) 1997--2008 Martin Mares <mj@ucw.cz>
+ * Copyright (c) 1997--2018 Martin Mares <mj@ucw.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#include "internal.h"
+#ifdef PCI_OS_DJGPP
+#include <crt0.h> /* for __dos_argv0 */
+#endif
+
+#ifdef PCI_OS_WINDOWS
+
+#include <windows.h>
+
+/* Force usage of ANSI (char*) variant of GetModuleFileName() function */
+#ifdef _WIN32
+#ifdef GetModuleFileName
+#undef GetModuleFileName
+#endif
+#define GetModuleFileName GetModuleFileNameA
+#endif
+
+/* Define __ImageBase for all linkers */
+#ifdef _WIN32
+/* GNU LD provides __ImageBase symbol since 2.19, in previous versions it is
+ * under name _image_base__, so add weak alias for compatibility. */
+#ifdef __GNUC__
+asm(".weak\t" PCI_STRINGIFY(__MINGW_USYMBOL(__ImageBase)) "\n\t"
+ ".set\t" PCI_STRINGIFY(__MINGW_USYMBOL(__ImageBase)) "," PCI_STRINGIFY(__MINGW_USYMBOL(_image_base__)));
+#endif
+/*
+ * MSVC link.exe provides __ImageBase symbol since 12.00 (MSVC 6.0), for
+ * previous versions resolve it at runtime via GetModuleHandleA() which
+ * returns base for main executable or via VirtualQuery() for DLL builds.
+ */
+#if defined(_MSC_VER) && _MSC_VER < 1200
+static HMODULE
+get_current_module_handle(void)
+{
+#ifdef PCI_SHARED_LIB
+ MEMORY_BASIC_INFORMATION info;
+ size_t len = VirtualQuery(&get_current_module_handle, &info, sizeof(info));
+ if (len != sizeof(info))
+ return NULL;
+ return (HMODULE)info.AllocationBase;
+#else
+ return GetModuleHandleA(NULL);
+#endif
+}
+#define __ImageBase (*(IMAGE_DOS_HEADER *)get_current_module_handle())
+#else
+extern IMAGE_DOS_HEADER __ImageBase;
+#endif
+#endif
+
+#if defined(_WINDLL)
+extern HINSTANCE _hModule;
+#elif defined(_WINDOWS)
+extern HINSTANCE _hInstance;
+#endif
+
+#endif
+
static struct pci_methods *pci_methods[PCI_ACCESS_MAX] = {
NULL,
#ifdef PCI_HAVE_PM_LINUX_SYSFS
#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 defined(PCI_HAVE_PM_ECAM)
+ &pm_ecam,
+#else
+ 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_ECAM,
+ 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->error("Out of memory (allocation of %d bytes failed)", size);
+ (a && a->error ? a->error : pci_generic_error)("Out of memory (allocation of %d bytes failed)", size);
return x;
}
}
char *
-pci_strdup(struct pci_access *a, char *s)
+pci_strdup(struct pci_access *a, const char *s)
{
int len = strlen(s) + 1;
char *t = pci_malloc(a, len);
return t;
}
-static void
-pci_generic_error(char *msg, ...)
+int
+pci_lookup_method(char *name)
{
- va_list args;
+ int i;
- va_start(args, msg);
- fputs("pcilib: ", stderr);
- vfprintf(stderr, msg, args);
- fputc('\n', stderr);
- exit(1);
+ for (i=0; i<PCI_ACCESS_MAX; i++)
+ if (pci_methods[i] && !strcmp(pci_methods[i]->name, name))
+ return i;
+ return -1;
}
-static void
-pci_generic_warn(char *msg, ...)
+char *
+pci_get_method_name(int index)
{
- va_list args;
-
- va_start(args, msg);
- fputs("pcilib: ", stderr);
- vfprintf(stderr, msg, args);
- fputc('\n', stderr);
+ if (index < 0 || index >= PCI_ACCESS_MAX)
+ return NULL;
+ else if (!pci_methods[index])
+ return "";
+ else
+ return pci_methods[index]->name;
}
+#if defined(PCI_OS_WINDOWS) || defined(PCI_OS_DJGPP)
+
static void
-pci_generic_debug(char *msg, ...)
+pci_init_name_list_path(struct pci_access *a)
{
- va_list args;
+ if ((PCI_PATH_IDS_DIR)[0])
+ pci_set_name_list_path(a, PCI_PATH_IDS_DIR "\\" PCI_IDS, 0);
+ else
+ {
+ char *path, *sep;
+ size_t len;
- va_start(args, msg);
- vfprintf(stdout, msg, args);
- va_end(args);
+#if defined(PCI_OS_WINDOWS) && (defined(_WIN32) || defined(_WINDLL) || defined(_WINDOWS))
+
+ HMODULE module;
+ size_t size;
+
+#if defined(_WIN32)
+ module = (HINSTANCE)&__ImageBase;
+#elif defined(_WINDLL)
+ module = _hModule;
+#elif defined(_WINDOWS)
+ module = _hInstance;
+#endif
+
+ /*
+ * Module file name can have arbitrary length despite all MS examples say
+ * about MAX_PATH upper limit. This limit does not apply for example when
+ * executable is running from network disk with very long UNC paths or
+ * when using "\\??\\" prefix for specifying executable binary path.
+ * Function GetModuleFileName() returns passed size argument when passed
+ * buffer is too small and does not signal any error. In this case retry
+ * again with larger buffer.
+ */
+ size = 256; /* initial buffer size (more than sizeof(PCI_IDS)-4) */
+retry:
+ path = pci_malloc(a, size);
+ len = GetModuleFileName(module, path, size-sizeof(PCI_IDS)-4); /* 4 for "\\\\?\\" */
+ if (len >= size-sizeof(PCI_IDS)-4)
+ {
+ free(path);
+ size *= 2;
+ goto retry;
+ }
+ else if (len == 0)
+ path[0] = '\0';
+
+ /*
+ * GetModuleFileName() has bugs. On Windows 10 it prepends current drive
+ * letter if path is just pure NT namespace (with "\\??\\" prefix). Such
+ * extra drive letter makes path fully invalid and unusable. So remove
+ * extra drive letter to make path valid again.
+ * Reproduce: CreateProcessW("\\??\\C:\\lspci.exe", ...)
+ */
+ if (((path[0] >= 'a' && path[0] <= 'z') ||
+ (path[0] >= 'A' && path[0] <= 'Z')) &&
+ strncmp(path+1, ":\\??\\", 5) == 0)
+ {
+ memmove(path, path+2, len-2);
+ len -= 2;
+ path[len] = '\0';
+ }
+
+ /*
+ * GetModuleFileName() has bugs. On Windows 10 it does not add "\\\\?\\"
+ * prefix when path is in native NT UNC namespace. Such path is treated by
+ * WinAPI/DOS functions as standard DOS path relative to the current
+ * directory, hence something completely different. So prepend missing
+ * "\\\\?\\" prefix to make path valid again.
+ * Reproduce: CreateProcessW("\\??\\UNC\\10.0.2.4\\qemu\\lspci.exe", ...)
+ *
+ * If path starts with DOS drive letter and with appended PCI_IDS is
+ * longer than 260 bytes and is without "\\\\?\\" prefix then append it.
+ * This prefix is required for paths and file names with DOS drive letter
+ * longer than 260 bytes.
+ */
+ if (strncmp(path, "\\UNC\\", 5) == 0 ||
+ strncmp(path, "UNC\\", 4) == 0 ||
+ (((path[0] >= 'a' && path[0] <= 'z') || (path[0] >= 'A' && path[0] <= 'Z')) &&
+ len + sizeof(PCI_IDS) >= 260))
+ {
+ memmove(path+4, path, len);
+ memcpy(path, "\\\\?\\", 4);
+ len += 4;
+ path[len] = '\0';
+ }
+
+#elif defined(PCI_OS_DJGPP) || defined(PCI_OS_WINDOWS)
+
+ const char *exe_path;
+
+#ifdef PCI_OS_DJGPP
+ exe_path = __dos_argv0;
+#else
+ exe_path = _pgmptr;
+#endif
+
+ len = strlen(exe_path);
+ path = pci_malloc(a, len+sizeof(PCI_IDS));
+ memcpy(path, exe_path, len+1);
+
+#endif
+
+ sep = strrchr(path, '\\');
+ if (!sep)
+ {
+ /*
+ * If current module path (current executable for static builds or
+ * current DLL library for shared build) cannot be determined then
+ * fallback to the current directory.
+ */
+ 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_null_debug(char *msg UNUSED, ...)
+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 = malloc(sizeof(struct pci_access));
+ struct pci_access *a = pci_malloc(NULL, sizeof(struct pci_access));
int i;
memset(a, 0, sizeof(*a));
- pci_set_name_list_path(a, PCI_PATH_IDS_DIR "/" PCI_IDS, 0);
+ 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
- for(i=0; i<PCI_ACCESS_MAX; i++)
+#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(struct pci_access *a)
+int
+pci_init_internal(struct pci_access *a, int skip_method)
{
if (!a->error)
a->error = pci_generic_error;
if (!a->debugging)
a->debug = pci_null_debug;
- if (a->method)
+ if (a->method != PCI_ACCESS_AUTO)
{
if (a->method >= PCI_ACCESS_MAX || !pci_methods[a->method])
a->error("This access method is not supported.");
else
{
unsigned int i;
- for(i=0; i<PCI_ACCESS_MAX; i++)
- if (pci_methods[i])
- {
- a->debug("Trying method %d...", i);
- if (pci_methods[i]->detect(a))
- {
- a->debug("...OK\n");
- a->methods = pci_methods[i];
- a->method = i;
- break;
- }
- a->debug("...No.\n");
- }
+ for (i=0; probe_sequence[i] >= 0; i++)
+ {
+ struct pci_methods *m = pci_methods[probe_sequence[i]];
+ if (!m)
+ continue;
+ if (skip_method == probe_sequence[i])
+ 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.");
+ return 0;
}
a->debug("Decided to use %s\n", a->methods->name);
a->methods->init(a);
+ return 1;
+}
+
+void
+pci_init_v35(struct pci_access *a)
+{
+ if (!pci_init_internal(a, -1))
+ a->error("Cannot find any working access method.");
+}
+
+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);
+
+struct pci_access *
+pci_clone_access(struct pci_access *a)
+{
+ struct pci_access *b = pci_alloc();
+
+ b->writeable = a->writeable;
+ b->buscentric = a->buscentric;
+ b->debugging = a->debugging;
+ b->error = a->error;
+ b->warning = a->warning;
+ b->debug = a->debug;
+
+ return b;
}
void
{
struct pci_dev *d, *e;
- for(d=a->devices; d; d=e)
+ for (d=a->devices; d; d=e)
{
e = d->next;
pci_free_dev(d);
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