From 731cd5526e5c732d51307b26e784f454a724a699 Mon Sep 17 00:00:00 2001
From: Jesse Barnes <jbarnes@virtuousgeek.org>
Date: Wed, 17 Dec 2008 10:09:49 -0800
Subject: libdrm: add mode setting files

Add mode setting files to libdrm, including xf86drmMode.* and the new
drm_mode.h header.  Also add a couple of tests to sanity check the
kernel interfaces and update code to support them.
---
 libdrm/xf86drm.c | 44 ++++++++++++++++++++++++++++++++++----------
 1 file changed, 34 insertions(+), 10 deletions(-)

(limited to 'libdrm/xf86drm.c')

diff --git a/libdrm/xf86drm.c b/libdrm/xf86drm.c
index c36f1964..0b5d31fe 100644
--- a/libdrm/xf86drm.c
+++ b/libdrm/xf86drm.c
@@ -87,6 +87,9 @@
 
 #define DRM_MSG_VERBOSITY 3
 
+#define DRM_NODE_CONTROL 0
+#define DRM_NODE_RENDER 1
+
 static drmServerInfoPtr drm_server_info;
 
 void drmSetServerInfo(drmServerInfoPtr info)
@@ -174,7 +177,7 @@ static char *drmStrdup(const char *s)
 /**
  * Call ioctl, restarting if it is interupted
  */
-static int
+int
 drmIoctl(int fd, unsigned long request, void *arg)
 {
     int	ret;
@@ -277,7 +280,7 @@ static int drmMatchBusID(const char *id1, const char *id2)
  * special file node with the major and minor numbers specified by \p dev and
  * parent directory if necessary and was called by root.
  */
-static int drmOpenDevice(long dev, int minor)
+static int drmOpenDevice(long dev, int minor, int type)
 {
     stat_t          st;
     char            buf[64];
@@ -287,7 +290,7 @@ static int drmOpenDevice(long dev, int minor)
     uid_t           user    = DRM_DEV_UID;
     gid_t           group   = DRM_DEV_GID, serv_group;
     
-    sprintf(buf, DRM_DEV_NAME, DRM_DIR_NAME, minor);
+    sprintf(buf, type ? DRM_DEV_NAME : DRM_CONTROL_DEV_NAME, DRM_DIR_NAME, minor);
     drmMsg("drmOpenDevice: node name is %s\n", buf);
 
     if (drm_server_info) {
@@ -386,15 +389,15 @@ wait_for_udev:
  * Calls drmOpenDevice() if \p create is set, otherwise assembles the device
  * name from \p minor and opens it.
  */
-static int drmOpenMinor(int minor, int create)
+static int drmOpenMinor(int minor, int create, int type)
 {
     int  fd;
     char buf[64];
     
     if (create)
-	return drmOpenDevice(makedev(DRM_MAJOR, minor), minor);
+	return drmOpenDevice(makedev(DRM_MAJOR, minor), minor, type);
     
-    sprintf(buf, DRM_DEV_NAME, DRM_DIR_NAME, minor);
+    sprintf(buf, type ? DRM_DEV_NAME : DRM_CONTROL_DEV_NAME, DRM_DIR_NAME, minor);
     if ((fd = open(buf, O_RDWR, 0)) >= 0)
 	return fd;
     return -errno;
@@ -417,7 +420,7 @@ int drmAvailable(void)
     int           retval = 0;
     int           fd;
 
-    if ((fd = drmOpenMinor(0, 1)) < 0) {
+    if ((fd = drmOpenMinor(0, 1, DRM_NODE_RENDER)) < 0) {
 #ifdef __linux__
 	/* Try proc for backward Linux compatibility */
 	if (!access("/proc/dri/0", R_OK))
@@ -458,7 +461,7 @@ static int drmOpenByBusid(const char *busid)
 
     drmMsg("drmOpenByBusid: Searching for BusID %s\n", busid);
     for (i = 0; i < DRM_MAX_MINOR; i++) {
-	fd = drmOpenMinor(i, 1);
+	fd = drmOpenMinor(i, 1, DRM_NODE_RENDER);
 	drmMsg("drmOpenByBusid: drmOpenMinor returns %d\n", fd);
 	if (fd >= 0) {
 	    sv.drm_di_major = 1;
@@ -520,7 +523,7 @@ static int drmOpenByName(const char *name)
      * already in use.  If it's in use it will have a busid assigned already.
      */
     for (i = 0; i < DRM_MAX_MINOR; i++) {
-	if ((fd = drmOpenMinor(i, 1)) >= 0) {
+	if ((fd = drmOpenMinor(i, 1, DRM_NODE_RENDER)) >= 0) {
 	    if ((version = drmGetVersion(fd))) {
 		if (!strcmp(version->name, name)) {
 		    drmFreeVersion(version);
@@ -564,7 +567,7 @@ static int drmOpenByName(const char *name)
 			if (*pt) { /* Found busid */
 			    return drmOpenByBusid(++pt);
 			} else { /* No busid */
-			    return drmOpenDevice(strtol(devstring, NULL, 0),i);
+			    return drmOpenDevice(strtol(devstring, NULL, 0),i, DRM_NODE_RENDER);
 			}
 		    }
 		}
@@ -614,6 +617,10 @@ int drmOpen(const char *name, const char *busid)
     return -1;
 }
 
+int drmOpenControl(int minor)
+{
+    return drmOpenMinor(minor, 0, DRM_NODE_CONTROL);
+}
 
 /**
  * Free the version information returned by drmGetVersion().
@@ -2434,3 +2441,20 @@ void drmCloseOnce(int fd)
 	}
     }
 }
+
+int drmSetMaster(int fd)
+{
+	int ret;
+
+	fprintf(stderr,"Setting master \n");
+	ret = ioctl(fd, DRM_IOCTL_SET_MASTER, 0);
+	return ret;
+}
+
+int drmDropMaster(int fd)
+{
+	int ret;
+	fprintf(stderr,"Dropping master \n");
+	ret = ioctl(fd, DRM_IOCTL_DROP_MASTER, 0);
+	return ret;
+}
-- 
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