[libdrm,2/2] Add new drmOpenRender function

Commit Message

Frank Binns Jan. 14, 2015, 2:07 p.m. UTC

Add a new function, drmOpenRender, that can be used to open render nodes. This
can be used in the same way that drmOpenControl is used to open control nodes.

Signed-off-by: Frank Binns <[e-mail]>
---
 xf86drm.c | 40 ++++++++++++++++++++++++++++++++++++++--
 xf86drm.h |  2 ++
 2 files changed, 40 insertions(+), 2 deletions(-)

Patch

diff --git a/xf86drm.c b/xf86drm.c
index a23d029..345325a 100644
--- a/xf86drm.c
+++ b/xf86drm.c
@@ -87,6 +87,7 @@ 
 
 #define DRM_NODE_CONTROL 0
 #define DRM_NODE_PRIMARY 1
+#define DRM_NODE_RENDER 2
 
 static drmServerInfoPtr drm_server_info;
 
@@ -305,6 +306,7 @@  static int chown_check_return(const char *path, uid_t owner, gid_t group)
 static int drmOpenDevice(long dev, int minor, int type)
 {
     stat_t          st;
+    const char      *dev_name;
     char            buf[64];
     int             fd;
     mode_t          devmode = DRM_DEV_MODE, serv_mode;
@@ -312,7 +314,21 @@  static int drmOpenDevice(long dev, int minor, int type)
     uid_t           user    = DRM_DEV_UID;
     gid_t           group   = DRM_DEV_GID, serv_group;
     
-    sprintf(buf, type ? DRM_DEV_NAME : DRM_CONTROL_DEV_NAME, DRM_DIR_NAME, minor);
+    switch (type) {
+    case DRM_NODE_PRIMARY:
+	    dev_name = DRM_DEV_NAME;
+	    break;
+    case DRM_NODE_CONTROL:
+	    dev_name = DRM_CONTROL_DEV_NAME;
+	    break;
+    case DRM_NODE_RENDER:
+	    dev_name = DRM_RENDER_DEV_NAME;
+	    break;
+    default:
+	    return -EINVAL;
+    };
+
+    sprintf(buf, dev_name, DRM_DIR_NAME, minor);
     drmMsg("drmOpenDevice: node name is %s\n", buf);
 
     if (drm_server_info) {
@@ -417,11 +433,26 @@  static int drmOpenMinor(int minor, int create, int type)
 {
     int  fd;
     char buf[64];
+    const char *dev_name;
     
     if (create)
 	return drmOpenDevice(makedev(DRM_MAJOR, minor), minor, type);
     
-    sprintf(buf, type ? DRM_DEV_NAME : DRM_CONTROL_DEV_NAME, DRM_DIR_NAME, minor);
+    switch (type) {
+    case DRM_NODE_PRIMARY:
+	    dev_name = DRM_DEV_NAME;
+	    break;
+    case DRM_NODE_CONTROL:
+	    dev_name = DRM_CONTROL_DEV_NAME;
+	    break;
+    case DRM_NODE_RENDER:
+	    dev_name = DRM_RENDER_DEV_NAME;
+	    break;
+    default:
+	    return -EINVAL;
+    };
+
+    sprintf(buf, dev_name, DRM_DIR_NAME, minor);
     if ((fd = open(buf, O_RDWR, 0)) >= 0)
 	return fd;
     return -errno;
@@ -646,6 +677,11 @@  int drmOpenControl(int minor)
     return drmOpenMinor(minor, 0, DRM_NODE_CONTROL);
 }
 
+int drmOpenRender(int minor)
+{
+    return drmOpenMinor(minor, 0, DRM_NODE_RENDER);
+}
+
 /**
  * Free the version information returned by drmGetVersion().
  *
diff --git a/xf86drm.h b/xf86drm.h
index c024cc4..bfd0670 100644
--- a/xf86drm.h
+++ b/xf86drm.h
@@ -79,6 +79,7 @@  extern "C" {
 #define DRM_DIR_NAME  "/dev/dri"
 #define DRM_DEV_NAME  "%s/card%d"
 #define DRM_CONTROL_DEV_NAME  "%s/controlD%d"
+#define DRM_RENDER_DEV_NAME  "%s/renderD%d"
 #define DRM_PROC_NAME "/proc/dri/" /* For backward Linux compatibility */
 
 #define DRM_ERR_NO_DEVICE  (-1001)
@@ -552,6 +553,7 @@  do {	register unsigned int __old __asm("o0");		\
 extern int           drmAvailable(void);
 extern int           drmOpen(const char *name, const char *busid);
 extern int drmOpenControl(int minor);
+extern int           drmOpenRender(int minor);
 extern int           drmClose(int fd);
 extern drmVersionPtr drmGetVersion(int fd);
 extern drmVersionPtr drmGetLibVersion(int fd);