[INFINIBAND]: Add InfiniBand MAD (management datagram) support (public headers)

Add public headers for handling InfiniBand MADs (management
datagrams), including sending and receiving MADs as well as passing
MADs on to local agents.
Signed-off-by: Roland Dreier <roland@topspin.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/infiniband/include/ib_smi.h

+/*
+ * Copyright (c) 2004 Mellanox Technologies Ltd.  All rights reserved.
+ * Copyright (c) 2004 Infinicon Corporation.  All rights reserved.
+ * Copyright (c) 2004 Intel Corporation.  All rights reserved.
+ * Copyright (c) 2004 Topspin Corporation.  All rights reserved.
+ * Copyright (c) 2004 Voltaire Corporation.  All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * 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
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * 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.
+ *
+ * $Id: ib_smi.h 1389 2004-12-27 22:56:47Z roland $
+ */
+
+#if !defined( IB_SMI_H )
+#define IB_SMI_H
+
+#include <ib_mad.h>
+
+#define IB_LID_PERMISSIVE			0xFFFF
+
+#define IB_SMP_DATA_SIZE			64
+#define IB_SMP_MAX_PATH_HOPS			64
+
+struct ib_smp {
+	u8	base_version;
+	u8	mgmt_class;
+	u8	class_version;
+	u8	method;
+	u16	status;
+	u8	hop_ptr;
+	u8	hop_cnt;
+	u64	tid;
+	u16	attr_id;
+	u16	resv;
+	u32	attr_mod;
+	u64	mkey;
+	u16	dr_slid;
+	u16	dr_dlid;
+	u8	reserved[28];
+	u8	data[IB_SMP_DATA_SIZE];
+	u8	initial_path[IB_SMP_MAX_PATH_HOPS];
+	u8	return_path[IB_SMP_MAX_PATH_HOPS];
+} __attribute__ ((packed));
+
+#define IB_SMP_DIRECTION			__constant_htons(0x8000)
+
+/* Subnet management attributes */
+#define IB_SMP_ATTR_NOTICE			__constant_htons(0x0002)
+#define IB_SMP_ATTR_NODE_DESC			__constant_htons(0x0010)
+#define IB_SMP_ATTR_NODE_INFO			__constant_htons(0x0011)
+#define IB_SMP_ATTR_SWITCH_INFO			__constant_htons(0x0012)
+#define IB_SMP_ATTR_GUID_INFO			__constant_htons(0x0014)
+#define IB_SMP_ATTR_PORT_INFO			__constant_htons(0x0015)
+#define IB_SMP_ATTR_PKEY_TABLE			__constant_htons(0x0016)
+#define IB_SMP_ATTR_SL_TO_VL_TABLE		__constant_htons(0x0017)
+#define IB_SMP_ATTR_VL_ARB_TABLE		__constant_htons(0x0018)
+#define IB_SMP_ATTR_LINEAR_FORWARD_TABLE	__constant_htons(0x0019)
+#define IB_SMP_ATTR_RANDOM_FORWARD_TABLE	__constant_htons(0x001A)
+#define IB_SMP_ATTR_MCAST_FORWARD_TABLE		__constant_htons(0x001B)
+#define IB_SMP_ATTR_SM_INFO			__constant_htons(0x0020)
+#define IB_SMP_ATTR_VENDOR_DIAG			__constant_htons(0x0030)
+#define IB_SMP_ATTR_LED_INFO			__constant_htons(0x0031)
+#define IB_SMP_ATTR_VENDOR_MASK			__constant_htons(0xFF00)
+
+static inline u8
+ib_get_smp_direction(struct ib_smp *smp)
+{
+	return ((smp->status & IB_SMP_DIRECTION) == IB_SMP_DIRECTION);
+}
+
+#endif /* IB_SMI_H */