1 files changed, 98 insertions, 0 deletions
diff --git a/src/via_drmclient.h b/src/via_drmclient.h
new file mode 100644
index 000000000000..8d54693ecd4a
--- /dev/null
+++ b/src/via_drmclient.h
@@ -0,0 +1,98 @@
+/*
+ * Copyright (C) 2005 The Unichrome Project, All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sub license,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHOR(S) OR COPYRIGHT HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef _VIA_DRMCLIENT_H
+#define _VIA_DRMCLIENT_H
+
+#include "drm.h"
+#include "xf86drm.h"
+#include "stdint.h"
+
+#ifdef X_NEED_DRMLOCK
+#define drm_hw_lock_t drmLock
+#endif
+
+#define UNICHROME_LOCK(fd, lockNo, saPriv, context, lastcontext, ret)	\
+    do {								\
+	volatile drm_hw_lock_t *lockPtr = XVMCLOCKPTR((saPriv), (lockNo));	\
+	unsigned lockVal;						\
+        DRM_CAS_RESULT(__ret);						\
+									\
+	ret = 0;							\
+	lockVal = lockPtr->lock & ~(DRM_LOCK_HELD | DRM_LOCK_CONT);	\
+	DRM_CAS(lockPtr, lockVal, (context) | DRM_LOCK_HELD, __ret);	\
+	if (__ret) {							\
+	    drm_via_futex_t fx;						\
+									\
+            lockVal = lockPtr->lock;					\
+	    if (! (lockVal & DRM_LOCK_HELD)) continue;			\
+	    if ((lockVal & ~(DRM_LOCK_HELD | DRM_LOCK_CONT) )		\
+		== (context)) {						\
+	      lastcontext = lockVal & ~(DRM_LOCK_HELD | DRM_LOCK_CONT);	\
+		break;							\
+	    }								\
+	    fx.val = lockVal | DRM_LOCK_CONT;				\
+	    DRM_CAS( lockPtr, lockVal, fx.val, __ret);			\
+	    lockVal = lockPtr->lock;					\
+	    if (__ret) continue;					\
+	    fx.func = VIA_FUTEX_WAIT;					\
+	    fx.lock = (lockNo);						\
+	    fx.ms = 10;							\
+	    ret = drmCommandWrite((fd), DRM_VIA_DEC_FUTEX,		\
+				  &fx,sizeof(fx));			\
+	    lastcontext = lockVal;					\
+	    if (ret) break;						\
+	    continue;							\
+	} else {							\
+	    lastcontext = lockVal;					\
+	    break;							\
+	}								\
+    } while (1)								\
+    
+#define UNICHROME_UNLOCK(fd, lockNo, saPriv, context)			\
+    do {								\
+      volatile drm_hw_lock_t *lockPtr = XVMCLOCKPTR((saPriv), (lockNo)); 	\
+									\
+	if ((lockPtr->lock & ~DRM_LOCK_CONT) ==				\
+	       ((context) | DRM_LOCK_HELD)) {				\
+	  DRM_CAS_RESULT(__ret);					\
+	    DRM_CAS(lockPtr,(context) | DRM_LOCK_HELD, context, __ret); \
+	    if (__ret) {						\
+		drm_via_futex_t fx;					\
+		fx.func = VIA_FUTEX_WAKE;				\
+		fx.lock = lockNo;					\
+		DRM_CAS(lockPtr, (context) | DRM_LOCK_HELD |		\
+			DRM_LOCK_CONT,					\
+			context, __ret);				\
+		drmCommandWrite((fd), DRM_VIA_DEC_FUTEX, &fx,		\
+				sizeof(fx));				\
+	    }								\
+	}								\
+    } while (0)								\
+
+#define UNICHROME_LOCK_DECODER1 0
+#define UNICHROME_LOCK_DECODER2 1
+#define UNICHROME_LOCK_HQV      4
+#define __user
+      
+#endif