drm: Add a function to get the ioctl flags

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Brian Paul <brianp@vmware.com>

diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
index cf2dfb790bf1e844db3bfa03039a5289c946953a..03711d00aaaea91d4225088f6311ad309dc262d1 100644 (file)
--- a/drivers/gpu/drm/drm_drv.c
+++ b/drivers/gpu/drm/drm_drv.c
@@ -450,3 +450,21 @@ long drm_ioctl(struct file *filp,
        return retcode;
 }
 EXPORT_SYMBOL(drm_ioctl);
+
+/**
+ * drm_ioctl_flags - Check for core ioctl and return ioctl permission flags
+ *
+ * @nr: Ioctl number.
+ * @flags: Where to return the ioctl permission flags
+ */
+bool drm_ioctl_flags(unsigned int nr, unsigned int *flags)
+{
+       if ((nr >= DRM_COMMAND_END && nr < DRM_CORE_IOCTL_COUNT) ||
+           (nr < DRM_COMMAND_BASE)) {
+               *flags = drm_ioctls[nr].flags;
+               return true;
+       }
+
+       return false;
+}
+EXPORT_SYMBOL(drm_ioctl_flags);

diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index 4e24a1a0daeb0bd93f03efff0b301973737dd98c..e97fc998374c7f1936a89fb9830771f4496e5f42 100644 (file)
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -1229,6 +1229,7 @@ extern long drm_ioctl(struct file *filp,
 extern long drm_compat_ioctl(struct file *filp,
                             unsigned int cmd, unsigned long arg);
 extern int drm_lastclose(struct drm_device *dev);
+extern bool drm_ioctl_flags(unsigned int nr, unsigned int *flags);
 
                                /* Device support (drm_fops.h) */
 extern struct mutex drm_global_mutex;