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-rw-r--r--mesalib/src/loader/loader.c172
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)