From 607964ed9e5f6d86a0960bef2341e7f5de9c71da Mon Sep 17 00:00:00 2001
From: Dave Airlie <airlied@panoply-rh.(none)>
Date: Mon, 17 Mar 2008 16:37:46 +1000
Subject: drm: add master set/drop protocol

this may not survive long - just need something for testing
---
 libdrm/xf86drm.c      | 17 +++++++++++++++++
 libdrm/xf86drm.h      |  3 +++
 linux-core/drmP.h     |  4 ++++
 linux-core/drm_drv.c  |  3 +++
 linux-core/drm_stub.c | 23 +++++++++++++++++++++++
 shared-core/drm.h     |  3 +++
 6 files changed, 53 insertions(+)

diff --git a/libdrm/xf86drm.c b/libdrm/xf86drm.c
index bcf562d5..53275f52 100644
--- a/libdrm/xf86drm.c
+++ b/libdrm/xf86drm.c
@@ -2977,3 +2977,20 @@ 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;
+}
diff --git a/libdrm/xf86drm.h b/libdrm/xf86drm.h
index 7b418604..35780aca 100644
--- a/libdrm/xf86drm.h
+++ b/libdrm/xf86drm.h
@@ -660,6 +660,9 @@ extern int  drmSLLookupNeighbors(void *l, unsigned long key,
 extern int drmOpenOnce(void *unused, const char *BusID, int *newlyopened);
 extern void drmCloseOnce(int fd);
 
+extern int drmSetMaster(int fd);
+extern int drmDropMaster(int fd);
+
 #include "xf86mm.h"
 
 #endif
diff --git a/linux-core/drmP.h b/linux-core/drmP.h
index 8273c879..c2c3cdde 100644
--- a/linux-core/drmP.h
+++ b/linux-core/drmP.h
@@ -1266,6 +1266,10 @@ extern int drm_agp_unbind_memory(DRM_AGP_MEM * handle);
 extern struct drm_ttm_backend *drm_agp_init_ttm(struct drm_device *dev);
 extern void drm_agp_chipset_flush(struct drm_device *dev);
 				/* Stub support (drm_stub.h) */
+extern int drm_setmaster_ioctl(struct drm_device *dev, void *data,
+			       struct drm_file *file_priv);
+extern int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
+				struct drm_file *file_priv);
 extern struct drm_master *drm_get_master(struct drm_minor *minor);
 extern void drm_put_master(struct drm_master *master);
 extern int drm_get_dev(struct pci_dev *pdev, const struct pci_device_id *ent,
diff --git a/linux-core/drm_drv.c b/linux-core/drm_drv.c
index 09372c71..649d4cae 100644
--- a/linux-core/drm_drv.c
+++ b/linux-core/drm_drv.c
@@ -76,6 +76,9 @@ static struct drm_ioctl_desc drm_ioctls[] = {
 	DRM_IOCTL_DEF(DRM_IOCTL_SET_SAREA_CTX, drm_setsareactx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 	DRM_IOCTL_DEF(DRM_IOCTL_GET_SAREA_CTX, drm_getsareactx, DRM_AUTH),
 
+	DRM_IOCTL_DEF(DRM_IOCTL_SET_MASTER, drm_setmaster_ioctl, DRM_ROOT_ONLY),
+	DRM_IOCTL_DEF(DRM_IOCTL_DROP_MASTER, drm_dropmaster_ioctl, DRM_ROOT_ONLY),
+
 	DRM_IOCTL_DEF(DRM_IOCTL_ADD_CTX, drm_addctx, DRM_AUTH|DRM_ROOT_ONLY),
 	DRM_IOCTL_DEF(DRM_IOCTL_RM_CTX, drm_rmctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 	DRM_IOCTL_DEF(DRM_IOCTL_MOD_CTX, drm_modctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
diff --git a/linux-core/drm_stub.c b/linux-core/drm_stub.c
index 6856075b..f66dec07 100644
--- a/linux-core/drm_stub.c
+++ b/linux-core/drm_stub.c
@@ -88,6 +88,29 @@ again:
 	return new_id;
 }
 
+int drm_setmaster_ioctl(struct drm_device *dev, void *data,
+			struct drm_file *file_priv)
+{
+	if (file_priv->minor->master && file_priv->minor->master != file_priv->master)
+		return -EINVAL;
+
+	if (!file_priv->master)
+		return -EINVAL;
+
+	if (!file_priv->minor->master && file_priv->minor->master != file_priv->master)
+		file_priv->minor->master = file_priv->master;
+	return 0;
+}
+
+int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
+			 struct drm_file *file_priv)
+{
+	if (!file_priv->master)
+		return -EINVAL;
+	file_priv->minor->master = NULL;
+	return 0;
+}
+
 struct drm_master *drm_get_master(struct drm_minor *minor)
 {
 	struct drm_master *master;
diff --git a/shared-core/drm.h b/shared-core/drm.h
index a1ebfb93..a72263ae 100644
--- a/shared-core/drm.h
+++ b/shared-core/drm.h
@@ -1200,6 +1200,9 @@ struct drm_mode_hotplug {
 #define DRM_IOCTL_SET_SAREA_CTX		DRM_IOW( 0x1c, struct drm_ctx_priv_map)
 #define DRM_IOCTL_GET_SAREA_CTX		DRM_IOWR(0x1d, struct drm_ctx_priv_map)
 
+#define DRM_IOCTL_SET_MASTER            DRM_IO(0x1e)
+#define DRM_IOCTL_DROP_MASTER           DRM_IO(0x1f)
+
 #define DRM_IOCTL_ADD_CTX		DRM_IOWR(0x20, struct drm_ctx)
 #define DRM_IOCTL_RM_CTX		DRM_IOWR(0x21, struct drm_ctx)
 #define DRM_IOCTL_MOD_CTX		DRM_IOW( 0x22, struct drm_ctx)
-- 
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