1 files changed, 84 insertions, 0 deletions
diff --git a/usr/src/uts/intel/io/vmxnet/net_sg.h b/usr/src/uts/intel/io/vmxnet/net_sg.h
new file mode 100644
index 0000000000..f6c30fb2b5
--- /dev/null
+++ b/usr/src/uts/intel/io/vmxnet/net_sg.h
@@ -0,0 +1,84 @@
+/*********************************************************
+ * Copyright (C) 2000 VMware, Inc. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation version 2 and no later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+ *
+ *********************************************************/
+
+/*********************************************************
+ * The contents of this file are subject to the terms of the Common
+ * Development and Distribution License (the "License") version 1.0
+ * and no later version.  You may not use this file except in
+ * compliance with the License.
+ *
+ * You can obtain a copy of the License at
+ *         http://www.opensource.org/licenses/cddl1.php
+ *
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ *********************************************************/
+
+/*
+ * net_sg.h --
+ *
+ *	Network packet scatter gather structure.
+ */
+
+
+#ifndef _NET_SG_H
+#define _NET_SG_H
+
+#define INCLUDE_ALLOW_USERLEVEL
+
+#define INCLUDE_ALLOW_MODULE
+#define INCLUDE_ALLOW_VMK_MODULE
+#define INCLUDE_ALLOW_VMKERNEL
+#define INCLUDE_ALLOW_DISTRIBUTE
+#include "includeCheck.h"
+
+#define NET_SG_DEFAULT_LENGTH	16
+
+/*
+ * A single scatter-gather element for a network packet.
+ * The address is split into low and high to save space.
+ * If we make it 64 bits then Windows pads things out such that
+ * we lose a lot of space for each scatter gather array.
+ * This adds up when you have embedded scatter-gather 
+ * arrays for transmit and receive ring buffers.
+ */
+typedef struct NetSG_Elem {
+   uint32 	addrLow;
+   uint16	addrHi;
+   uint16	length;
+} NetSG_Elem;
+
+typedef enum NetSG_AddrType {
+   NET_SG_MACH_ADDR,
+   NET_SG_PHYS_ADDR,
+   NET_SG_VIRT_ADDR,
+} NetSG_AddrType;
+
+typedef struct NetSG_Array {
+   uint16	addrType;
+   uint16	length;
+   NetSG_Elem	sg[NET_SG_DEFAULT_LENGTH];
+} NetSG_Array;
+
+#define NET_SG_SIZE(len) (sizeof(NetSG_Array) + (len - NET_SG_DEFAULT_LENGTH) * sizeof(NetSG_Elem))
+
+#define NET_SG_MAKE_PA(elem)                 (PA)QWORD(elem.addrHi, elem.addrLow)
+#define NET_SG_MAKE_PTR(elem) (char *)(uintptr_t)QWORD(elem.addrHi, elem.addrLow)
+
+#endif