diff options
Diffstat (limited to 'mesalib/src/loader/loader.c')
| -rw-r--r-- | mesalib/src/loader/loader.c | 172 |
1 files changed, 156 insertions, 16 deletions
diff --git a/mesalib/src/loader/loader.c b/mesalib/src/loader/loader.c index 666d0158a..0f262653b 100644 --- a/mesalib/src/loader/loader.c +++ b/mesalib/src/loader/loader.c @@ -71,6 +71,10 @@ #include <assert.h> #include <dlfcn.h> #endif +#ifdef HAVE_SYSFS +#include <sys/stat.h> +#include <sys/types.h> +#endif #include "loader.h" #ifndef __NOT_HAVE_DRM_H @@ -113,8 +117,8 @@ udev_dlopen_handle(void) udev_handle = dlopen("libudev.so.0", RTLD_LOCAL | RTLD_LAZY); if (!udev_handle) { - log_(_LOADER_FATAL, "Couldn't dlopen libudev.so.1 or libudev.so.0, " - "driver detection may be broken.\n"); + log_(_LOADER_WARNING, "Couldn't dlopen libudev.so.1 or " + "libudev.so.0, driver detection may be broken.\n"); } } } @@ -122,16 +126,19 @@ udev_dlopen_handle(void) return udev_handle; } +static int dlsym_failed = 0; + static void * -asserted_dlsym(void *dlopen_handle, const char *name) +checked_dlsym(void *dlopen_handle, const char *name) { void *result = dlsym(dlopen_handle, name); - assert(result); + if (!result) + dlsym_failed = 1; return result; } #define UDEV_SYMBOL(ret, name, args) \ - ret (*name) args = asserted_dlsym(udev_dlopen_handle(), #name); + ret (*name) args = checked_dlsym(udev_dlopen_handle(), #name); static inline struct udev_device * @@ -142,6 +149,9 @@ udev_device_new_from_fd(struct udev *udev, int fd) UDEV_SYMBOL(struct udev_device *, udev_device_new_from_devnum, (struct udev *udev, char type, dev_t devnum)); + if (dlsym_failed) + return NULL; + if (fstat(fd, &buf) < 0) { log_(_LOADER_WARNING, "MESA-LOADER: failed to stat fd %d\n", fd); return NULL; @@ -157,8 +167,8 @@ udev_device_new_from_fd(struct udev *udev, int fd) return device; } -int -loader_get_pci_id_for_fd(int fd, int *vendor_id, int *chip_id) +static int +libudev_get_pci_id_for_fd(int fd, int *vendor_id, int *chip_id) { struct udev *udev = NULL; struct udev_device *device = NULL, *parent; @@ -174,6 +184,9 @@ loader_get_pci_id_for_fd(int fd, int *vendor_id, int *chip_id) *chip_id = -1; + if (dlsym_failed) + return 0; + udev = udev_new(); device = udev_device_new_from_fd(udev, fd); if (!device) @@ -201,16 +214,76 @@ out: return (*chip_id >= 0); } +#endif + +#if defined(HAVE_SYSFS) +static int +dev_node_from_fd(int fd, unsigned int *maj, unsigned int *min) +{ + struct stat buf; + + if (fstat(fd, &buf) < 0) { + log_(_LOADER_WARNING, "MESA-LOADER: failed to stat fd %d\n", fd); + return -1; + } + + if (!S_ISCHR(buf.st_mode)) { + log_(_LOADER_WARNING, "MESA-LOADER: fd %d not a character device\n", fd); + return -1; + } + + *maj = major(buf.st_rdev); + *min = minor(buf.st_rdev); + + return 0; +} + +static int +sysfs_get_pci_id_for_fd(int fd, int *vendor_id, int *chip_id) +{ + unsigned int maj, min; + FILE *f; + char buf[0x40]; + + if (dev_node_from_fd(fd, &maj, &min) < 0) { + *chip_id = -1; + return 0; + } -#elif !defined(__NOT_HAVE_DRM_H) + snprintf(buf, sizeof(buf), "/sys/dev/char/%d:%d/device/vendor", maj, min); + if (!(f = fopen(buf, "r"))) { + *chip_id = -1; + return 0; + } + if (fscanf(f, "%x", vendor_id) != 1) { + *chip_id = -1; + fclose(f); + return 0; + } + fclose(f); + snprintf(buf, sizeof(buf), "/sys/dev/char/%d:%d/device/device", maj, min); + if (!(f = fopen(buf, "r"))) { + *chip_id = -1; + return 0; + } + if (fscanf(f, "%x", chip_id) != 1) { + *chip_id = -1; + fclose(f); + return 0; + } + fclose(f); + return 1; +} +#endif +#if !defined(__NOT_HAVE_DRM_H) /* for i915 */ #include <i915_drm.h> /* for radeon */ #include <radeon_drm.h> -int -loader_get_pci_id_for_fd(int fd, int *vendor_id, int *chip_id) +static int +drm_get_pci_id_for_fd(int fd, int *vendor_id, int *chip_id) { drmVersionPtr version; @@ -272,23 +345,33 @@ loader_get_pci_id_for_fd(int fd, int *vendor_id, int *chip_id) return (*chip_id >= 0); } +#endif -#else int loader_get_pci_id_for_fd(int fd, int *vendor_id, int *chip_id) { +#if HAVE_LIBUDEV + if (libudev_get_pci_id_for_fd(fd, vendor_id, chip_id)) + return 1; +#endif +#if HAVE_SYSFS + if (sysfs_get_pci_id_for_fd(fd, vendor_id, chip_id)) + return 1; +#endif +#if !defined(__NOT_HAVE_DRM_H) + if (drm_get_pci_id_for_fd(fd, vendor_id, chip_id)) + return 1; +#endif return 0; } -#endif - -char * -loader_get_device_name_for_fd(int fd) +#ifdef HAVE_LIBUDEV +static char * +libudev_get_device_name_for_fd(int fd) { char *device_name = NULL; -#ifdef HAVE_LIBUDEV struct udev *udev; struct udev_device *device; const char *const_device_name; @@ -312,9 +395,66 @@ loader_get_device_name_for_fd(int fd) out: udev_device_unref(device); udev_unref(udev); + return device_name; +} #endif + + +#if HAVE_SYSFS +static char * +sysfs_get_device_name_for_fd(int fd) +{ + char *device_name = NULL; + unsigned int maj, min; + FILE *f; + char buf[0x40]; + static const char match[9] = "\0DEVNAME="; + int expected = 1; + + if (dev_node_from_fd(fd, &maj, &min) < 0) + return NULL; + + snprintf(buf, sizeof(buf), "/sys/dev/char/%d:%d/uevent", maj, min); + if (!(f = fopen(buf, "r"))) + return NULL; + + while (expected < sizeof(match)) { + int c = getc(f); + + if (c == EOF) { + fclose(f); + return NULL; + } else if (c == match[expected] ) + expected++; + else + expected = 0; + } + + strcpy(buf, "/dev/"); + if (fgets(buf + 5, sizeof(buf) - 5, f)) + device_name = strdup(buf); + + fclose(f); return device_name; } +#endif + + +char * +loader_get_device_name_for_fd(int fd) +{ + char *result = NULL; + +#if HAVE_LIBUDEV + if ((result = libudev_get_device_name_for_fd(fd))) + return result; +#endif +#if HAVE_SYSFS + if ((result = sysfs_get_device_name_for_fd(fd))) + return result; +#endif + return result; +} char * loader_get_driver_for_fd(int fd, unsigned driver_types) |