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path: root/src/egl/drivers/dri2/common.c
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Diffstat (limited to 'src/egl/drivers/dri2/common.c')
-rw-r--r--src/egl/drivers/dri2/common.c111
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;
+}