X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/143464d58d2bd6378e74eec636961ceb0d32fb91..fe8ab488e9161c46dd9885d58fc52996dc0249ff:/bsd/sys/buf_internal.h?ds=sidebyside

diff --git a/bsd/sys/buf_internal.h b/bsd/sys/buf_internal.h
index 6c698d044..e0674869f 100644
--- a/bsd/sys/buf_internal.h
+++ b/bsd/sys/buf_internal.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000-2012 Apple Inc. All rights reserved.
+ * Copyright (c) 2000-2014 Apple Inc. All rights reserved.
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
@@ -256,13 +256,26 @@ extern vm_offset_t buf_kernel_addrperm;
 #define BA_DELAYIDLESLEEP       0x00000004	/* Process is marked to delay idle sleep on disk IO */
 #define BA_NOCACHE		0x00000008
 #define BA_META			0x00000010
-#define BA_IO_TIER_MASK		0x00000f00
-#define BA_IO_TIER_SHIFT	8
 #define BA_GREEDY_MODE		0x00000020	/* High speed writes that consume more storage */
 #define BA_QUICK_COMPLETE	0x00000040	/* Request quick completion at expense of storage efficiency */
+#define BA_PASSIVE 		0x00000080
+
+/*
+ * Note: IO_TIERs consume 0x0100, 0x0200, 0x0400, 0x0800
+ * These are now in-use by the I/O tiering system.
+ */ 
+#define BA_IO_TIER_MASK		0x00000f00
+#define BA_IO_TIER_SHIFT	8
+
+#define BA_ISOCHRONOUS  	0x00001000 /* device specific isochronous throughput to media */
+
 
 #define GET_BUFATTR_IO_TIER(bap)	((bap->ba_flags & BA_IO_TIER_MASK) >> BA_IO_TIER_SHIFT)
-#define SET_BUFATTR_IO_TIER(bap, tier)	(bap->ba_flags |= ((tier << BA_IO_TIER_SHIFT) & BA_IO_TIER_MASK))
+#define SET_BUFATTR_IO_TIER(bap, tier)						\
+do {										\
+	(bap)->ba_flags &= (~BA_IO_TIER_MASK); 					\
+	(bap)->ba_flags |= (((tier) << BA_IO_TIER_SHIFT) & BA_IO_TIER_MASK);	\
+} while(0)
 
 extern int niobuf_headers;		/* The number of IO buffer headers for cluster IO */
 extern int nbuf_headers;		/* The number of buffer headers */