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/*

 * Copyright (c) 2004 Topspin Communications.  All rights reserved.

 * Copyright (c) 2005 Voltaire, Inc. 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_user_mad.h 2814 2005-07-06 19:14:09Z halr $

 */

#ifndef IB_USER_MAD_H

#define IB_USER_MAD_H

#include <linux/types.h>

#include <linux/ioctl.h>

/*

 * Increment this value if any changes that break userspace ABI

 * compatibility are made.

 */

#define IB_USER_MAD_ABI_VERSION 5

/*

 * Make sure that all structs defined in this file remain laid out so

 * that they pack the same way on 32-bit and 64-bit architectures (to

 * avoid incompatibility between 32-bit userspace and 64-bit kernels).

 */

/**

 * ib_user_mad_hdr_old - Old version of MAD packet header without pkey_index

 * @id - ID of agent MAD received with/to be sent with

 * @status - 0 on successful receive, ETIMEDOUT if no response

 *   received (transaction ID in data[] will be set to TID of original

 *   request) (ignored on send)

 * @timeout_ms - Milliseconds to wait for response (unset on receive)

 * @retries - Number of automatic retries to attempt

 * @qpn - Remote QP number received from/to be sent to

 * @qkey - Remote Q_Key to be sent with (unset on receive)

 * @lid - Remote lid received from/to be sent to

 * @sl - Service level received with/to be sent with

 * @path_bits - Local path bits received with/to be sent with

 * @grh_present - If set, GRH was received/should be sent

 * @gid_index - Local GID index to send with (unset on receive)

 * @hop_limit - Hop limit in GRH

 * @traffic_class - Traffic class in GRH

 * @gid - Remote GID in GRH

 * @flow_label - Flow label in GRH

 */

struct ib_user_mad_hdr_old {

        __u32   id;

        __u32   status;

        __u32   timeout_ms;

        __u32   retries;

        __u32   length;

        __be32  qpn;

        __be32  qkey;

        __be16  lid;

        __u8    sl;

        __u8    path_bits;

        __u8    grh_present;

        __u8    gid_index;

        __u8    hop_limit;

        __u8    traffic_class;

        __u8    gid[16];

        __be32  flow_label;

};

/**

 * ib_user_mad_hdr - MAD packet header

 *   This layout allows specifying/receiving the P_Key index.  To use

 *   this capability, an application must call the

 *   IB_USER_MAD_ENABLE_PKEY ioctl on the user MAD file handle before

 *   any other actions with the file handle.

 * @id - ID of agent MAD received with/to be sent with

 * @status - 0 on successful receive, ETIMEDOUT if no response

 *   received (transaction ID in data[] will be set to TID of original

 *   request) (ignored on send)

 * @timeout_ms - Milliseconds to wait for response (unset on receive)

 * @retries - Number of automatic retries to attempt

 * @qpn - Remote QP number received from/to be sent to

 * @qkey - Remote Q_Key to be sent with (unset on receive)

 * @lid - Remote lid received from/to be sent to

 * @sl - Service level received with/to be sent with

 * @path_bits - Local path bits received with/to be sent with

 * @grh_present - If set, GRH was received/should be sent

 * @gid_index - Local GID index to send with (unset on receive)

 * @hop_limit - Hop limit in GRH

 * @traffic_class - Traffic class in GRH

 * @gid - Remote GID in GRH

 * @flow_label - Flow label in GRH

 * @pkey_index - P_Key index

 */

struct ib_user_mad_hdr {

        __u32   id;

        __u32   status;

        __u32   timeout_ms;

        __u32   retries;

        __u32   length;

        __be32  qpn;

        __be32  qkey;

        __be16  lid;

        __u8    sl;

        __u8    path_bits;

        __u8    grh_present;

        __u8    gid_index;

        __u8    hop_limit;

        __u8    traffic_class;

        __u8    gid[16];

        __be32  flow_label;

        __u16   pkey_index;

        __u8    reserved[6];

};

/**

 * ib_user_mad - MAD packet

 * @hdr - MAD packet header

 * @data - Contents of MAD

 *

 */

struct ib_user_mad {

        struct ib_user_mad_hdr hdr;

        __u64   data[0];

};

/*

 * Earlier versions of this interface definition declared the

 * method_mask[] member as an array of __u32 but treated it as a

 * bitmap made up of longs in the kernel.  This ambiguity meant that

 * 32-bit big-endian applications that can run on both 32-bit and

 * 64-bit kernels had no consistent ABI to rely on, and 64-bit

 * big-endian applications that treated method_mask as being made up

 * of 32-bit words would have their bitmap misinterpreted.

 *

 * To clear up this confusion, we change the declaration of

 * method_mask[] to use unsigned long and handle the conversion from

 * 32-bit userspace to 64-bit kernel for big-endian systems in the

 * compat_ioctl method.  Unfortunately, to keep the structure layout

 * the same, we need the method_mask[] array to be aligned only to 4

 * bytes even when long is 64 bits, which forces us into this ugly

 * typedef.

 */

typedef unsigned long __attribute__((aligned(4))) packed_ulong;

#define IB_USER_MAD_LONGS_PER_METHOD_MASK (128 / (8 * sizeof (long)))

/**

 * ib_user_mad_reg_req - MAD registration request

 * @id - Set by the kernel; used to identify agent in future requests.

 * @qpn - Queue pair number; must be 0 or 1.

 * @method_mask - The caller will receive unsolicited MADs for any method

 *   where @method_mask = 1.

 * @mgmt_class - Indicates which management class of MADs should be receive

 *   by the caller.  This field is only required if the user wishes to

 *   receive unsolicited MADs, otherwise it should be 0.

 * @mgmt_class_version - Indicates which version of MADs for the given

 *   management class to receive.

 * @oui: Indicates IEEE OUI when mgmt_class is a vendor class

 *   in the range from 0x30 to 0x4f. Otherwise not used.

 * @rmpp_version: If set, indicates the RMPP version used.

 *

 */

struct ib_user_mad_reg_req {

        __u32   id;

        packed_ulong method_mask[IB_USER_MAD_LONGS_PER_METHOD_MASK];

        __u8    qpn;

        __u8    mgmt_class;

        __u8    mgmt_class_version;

        __u8    oui[3];

        __u8    rmpp_version;

};

#define IB_IOCTL_MAGIC          0x1b

#define IB_USER_MAD_REGISTER_AGENT      _IOWR(IB_IOCTL_MAGIC, 1, \

                                              struct ib_user_mad_reg_req)

#define IB_USER_MAD_UNREGISTER_AGENT    _IOW(IB_IOCTL_MAGIC, 2, __u32)

#define IB_USER_MAD_ENABLE_PKEY         _IO(IB_IOCTL_MAGIC, 3)

#endif /* IB_USER_MAD_H */