1 files changed, 111 insertions, 0 deletions
diff --git a/src/egl/drivers/dri2/common.c b/src/egl/drivers/dri2/common.c
new file mode 100644
index 00000000000..1860a3f738e
--- /dev/null
+++ b/src/egl/drivers/dri2/common.c
@@ -0,0 +1,111 @@
+#include <stdio.h>
+#include <string.h>
+
+#include <libudev.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include "egl_dri2.h"
+#define DRIVER_MAP_DRI2_ONLY
+#include "pci_ids/pci_id_driver_map.h"
+
+static struct udev_device *
+dri2_udev_device_new_from_fd(struct udev *udev, int fd)
+{
+   struct udev_device *device;
+   struct stat buf;
+
+   if (fstat(fd, &buf) < 0) {
+      _eglLog(_EGL_WARNING, "EGL-DRI2: failed to stat fd %d", fd);
+      return NULL;
+   }
+
+   device = udev_device_new_from_devnum(udev, 'c', buf.st_rdev);
+   if (device == NULL) {
+      _eglLog(_EGL_WARNING,
+              "EGL-DRI2: could not create udev device for fd %d", fd);
+      return NULL;
+   }
+
+   return device;
+}
+
+char *
+dri2_get_device_name_for_fd(int fd)
+{
+   struct udev *udev;
+   struct udev_device *device;
+   const char *const_device_name;
+   char *device_name = NULL;
+
+   udev = udev_new();
+   device = dri2_udev_device_new_from_fd(udev, fd);
+   if (device == NULL)
+      return NULL;
+
+   const_device_name = udev_device_get_devnode(device);
+   if (!const_device_name)
+      goto out;
+   device_name = strdup(const_device_name);
+
+out:
+   udev_device_unref(device);
+   udev_unref(udev);
+
+   return device_name;
+}
+
+char *
+dri2_get_driver_for_fd(int fd)
+{
+   struct udev *udev;
+   struct udev_device *device, *parent;
+   const char *pci_id;
+   char *driver = NULL;
+   int vendor_id, chip_id, i, j;
+
+   udev = udev_new();
+   device = dri2_udev_device_new_from_fd(udev, fd);
+   if (device == NULL)
+      return NULL;
+
+   parent = udev_device_get_parent(device);
+   if (parent == NULL) {
+      _eglLog(_EGL_WARNING, "DRI2: could not get parent device");
+      goto out;
+   }
+
+   pci_id = udev_device_get_property_value(parent, "PCI_ID");
+   if (pci_id == NULL ||
+       sscanf(pci_id, "%x:%x", &vendor_id, &chip_id) != 2) {
+      _eglLog(_EGL_WARNING, "EGL-DRI2: malformed or no PCI ID");
+      goto out;
+   }
+
+   for (i = 0; driver_map[i].driver; i++) {
+      if (vendor_id != driver_map[i].vendor_id)
+         continue;
+      if (driver_map[i].num_chips_ids == -1) {
+         driver = strdup(driver_map[i].driver);
+         _eglLog(_EGL_DEBUG, "pci id for %d: %04x:%04x, driver %s",
+                 fd, vendor_id, chip_id, driver);
+         goto out;
+      }
+
+      for (j = 0; j < driver_map[i].num_chips_ids; j++)
+         if (driver_map[i].chip_ids[j] == chip_id) {
+            driver = strdup(driver_map[i].driver);
+            _eglLog(_EGL_DEBUG, "pci id for %d: %04x:%04x, driver %s",
+                    fd, vendor_id, chip_id, driver);
+            goto out;
+         }
+   }
+
+out:
+   udev_device_unref(device);
+   udev_unref(udev);
+
+   return driver;
+}