659 lines
22 KiB
C
659 lines
22 KiB
C
/*
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* Copyright (c) 2004 Mellanox Technologies Ltd. All rights reserved.
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* Copyright (c) 2004 Infinicon Corporation. All rights reserved.
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* Copyright (c) 2004 Intel Corporation. All rights reserved.
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* Copyright (c) 2004 Topspin Corporation. All rights reserved.
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* Copyright (c) 2004-2006 Voltaire Corporation. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* $Id: ib_mad.h 5596 2006-03-03 01:00:07Z sean.hefty $
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*/
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#if !defined( IB_MAD_H )
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#define IB_MAD_H
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#include <linux/list.h>
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#include <rdma/ib_verbs.h>
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/* Management base version */
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#define IB_MGMT_BASE_VERSION 1
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/* Management classes */
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#define IB_MGMT_CLASS_SUBN_LID_ROUTED 0x01
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#define IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE 0x81
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#define IB_MGMT_CLASS_SUBN_ADM 0x03
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#define IB_MGMT_CLASS_PERF_MGMT 0x04
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#define IB_MGMT_CLASS_BM 0x05
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#define IB_MGMT_CLASS_DEVICE_MGMT 0x06
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#define IB_MGMT_CLASS_CM 0x07
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#define IB_MGMT_CLASS_SNMP 0x08
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#define IB_MGMT_CLASS_DEVICE_ADM 0x10
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#define IB_MGMT_CLASS_BOOT_MGMT 0x11
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#define IB_MGMT_CLASS_BIS 0x12
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#define IB_MGMT_CLASS_CONG_MGMT 0x21
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#define IB_MGMT_CLASS_VENDOR_RANGE2_START 0x30
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#define IB_MGMT_CLASS_VENDOR_RANGE2_END 0x4F
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#define IB_OPENIB_OUI (0x001405)
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/* Management methods */
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#define IB_MGMT_METHOD_GET 0x01
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#define IB_MGMT_METHOD_SET 0x02
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#define IB_MGMT_METHOD_GET_RESP 0x81
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#define IB_MGMT_METHOD_SEND 0x03
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#define IB_MGMT_METHOD_TRAP 0x05
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#define IB_MGMT_METHOD_REPORT 0x06
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#define IB_MGMT_METHOD_REPORT_RESP 0x86
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#define IB_MGMT_METHOD_TRAP_REPRESS 0x07
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#define IB_MGMT_METHOD_RESP 0x80
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#define IB_BM_ATTR_MOD_RESP cpu_to_be32(1)
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#define IB_MGMT_MAX_METHODS 128
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/* RMPP information */
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#define IB_MGMT_RMPP_VERSION 1
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#define IB_MGMT_RMPP_TYPE_DATA 1
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#define IB_MGMT_RMPP_TYPE_ACK 2
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#define IB_MGMT_RMPP_TYPE_STOP 3
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#define IB_MGMT_RMPP_TYPE_ABORT 4
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#define IB_MGMT_RMPP_FLAG_ACTIVE 1
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#define IB_MGMT_RMPP_FLAG_FIRST (1<<1)
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#define IB_MGMT_RMPP_FLAG_LAST (1<<2)
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#define IB_MGMT_RMPP_NO_RESPTIME 0x1F
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#define IB_MGMT_RMPP_STATUS_SUCCESS 0
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#define IB_MGMT_RMPP_STATUS_RESX 1
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#define IB_MGMT_RMPP_STATUS_ABORT_MIN 118
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#define IB_MGMT_RMPP_STATUS_T2L 118
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#define IB_MGMT_RMPP_STATUS_BAD_LEN 119
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#define IB_MGMT_RMPP_STATUS_BAD_SEG 120
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#define IB_MGMT_RMPP_STATUS_BADT 121
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#define IB_MGMT_RMPP_STATUS_W2S 122
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#define IB_MGMT_RMPP_STATUS_S2B 123
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#define IB_MGMT_RMPP_STATUS_BAD_STATUS 124
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#define IB_MGMT_RMPP_STATUS_UNV 125
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#define IB_MGMT_RMPP_STATUS_TMR 126
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#define IB_MGMT_RMPP_STATUS_UNSPEC 127
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#define IB_MGMT_RMPP_STATUS_ABORT_MAX 127
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#define IB_QP0 0
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#define IB_QP1 __constant_htonl(1)
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#define IB_QP1_QKEY 0x80010000
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#define IB_QP_SET_QKEY 0x80000000
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#define IB_DEFAULT_PKEY_PARTIAL 0x7FFF
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#define IB_DEFAULT_PKEY_FULL 0xFFFF
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enum {
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IB_MGMT_MAD_HDR = 24,
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IB_MGMT_MAD_DATA = 232,
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IB_MGMT_RMPP_HDR = 36,
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IB_MGMT_RMPP_DATA = 220,
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IB_MGMT_VENDOR_HDR = 40,
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IB_MGMT_VENDOR_DATA = 216,
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IB_MGMT_SA_HDR = 56,
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IB_MGMT_SA_DATA = 200,
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IB_MGMT_DEVICE_HDR = 64,
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IB_MGMT_DEVICE_DATA = 192,
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};
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struct ib_mad_hdr {
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u8 base_version;
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u8 mgmt_class;
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u8 class_version;
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u8 method;
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__be16 status;
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__be16 class_specific;
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__be64 tid;
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__be16 attr_id;
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__be16 resv;
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__be32 attr_mod;
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};
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struct ib_rmpp_hdr {
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u8 rmpp_version;
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u8 rmpp_type;
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u8 rmpp_rtime_flags;
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u8 rmpp_status;
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__be32 seg_num;
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__be32 paylen_newwin;
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};
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typedef u64 __bitwise ib_sa_comp_mask;
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#define IB_SA_COMP_MASK(n) ((__force ib_sa_comp_mask) cpu_to_be64(1ull << n))
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/*
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* ib_sa_hdr and ib_sa_mad structures must be packed because they have
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* 64-bit fields that are only 32-bit aligned. 64-bit architectures will
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* lay them out wrong otherwise. (And unfortunately they are sent on
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* the wire so we can't change the layout)
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*/
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struct ib_sa_hdr {
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__be64 sm_key;
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__be16 attr_offset;
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__be16 reserved;
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ib_sa_comp_mask comp_mask;
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} __attribute__ ((packed));
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struct ib_mad {
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struct ib_mad_hdr mad_hdr;
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u8 data[IB_MGMT_MAD_DATA];
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};
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struct ib_rmpp_mad {
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struct ib_mad_hdr mad_hdr;
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struct ib_rmpp_hdr rmpp_hdr;
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u8 data[IB_MGMT_RMPP_DATA];
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};
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struct ib_sa_mad {
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struct ib_mad_hdr mad_hdr;
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struct ib_rmpp_hdr rmpp_hdr;
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struct ib_sa_hdr sa_hdr;
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u8 data[IB_MGMT_SA_DATA];
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} __attribute__ ((packed));
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struct ib_vendor_mad {
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struct ib_mad_hdr mad_hdr;
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struct ib_rmpp_hdr rmpp_hdr;
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u8 reserved;
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u8 oui[3];
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u8 data[IB_MGMT_VENDOR_DATA];
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};
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struct ib_class_port_info
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{
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u8 base_version;
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u8 class_version;
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__be16 capability_mask;
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u8 reserved[3];
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u8 resp_time_value;
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u8 redirect_gid[16];
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__be32 redirect_tcslfl;
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__be16 redirect_lid;
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__be16 redirect_pkey;
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__be32 redirect_qp;
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__be32 redirect_qkey;
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u8 trap_gid[16];
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__be32 trap_tcslfl;
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__be16 trap_lid;
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__be16 trap_pkey;
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__be32 trap_hlqp;
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__be32 trap_qkey;
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};
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/**
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* ib_mad_send_buf - MAD data buffer and work request for sends.
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* @next: A pointer used to chain together MADs for posting.
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* @mad: References an allocated MAD data buffer for MADs that do not have
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* RMPP active. For MADs using RMPP, references the common and management
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* class specific headers.
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* @mad_agent: MAD agent that allocated the buffer.
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* @ah: The address handle to use when sending the MAD.
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* @context: User-controlled context fields.
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* @hdr_len: Indicates the size of the data header of the MAD. This length
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* includes the common MAD, RMPP, and class specific headers.
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* @data_len: Indicates the total size of user-transferred data.
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* @seg_count: The number of RMPP segments allocated for this send.
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* @seg_size: Size of each RMPP segment.
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* @timeout_ms: Time to wait for a response.
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* @retries: Number of times to retry a request for a response. For MADs
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* using RMPP, this applies per window. On completion, returns the number
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* of retries needed to complete the transfer.
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*
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* Users are responsible for initializing the MAD buffer itself, with the
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* exception of any RMPP header. Additional segment buffer space allocated
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* beyond data_len is padding.
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*/
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struct ib_mad_send_buf {
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struct ib_mad_send_buf *next;
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void *mad;
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struct ib_mad_agent *mad_agent;
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struct ib_ah *ah;
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void *context[2];
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int hdr_len;
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int data_len;
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int seg_count;
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int seg_size;
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int timeout_ms;
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int retries;
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};
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/**
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* ib_response_mad - Returns if the specified MAD has been generated in
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* response to a sent request or trap.
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*/
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int ib_response_mad(struct ib_mad *mad);
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/**
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* ib_get_rmpp_resptime - Returns the RMPP response time.
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* @rmpp_hdr: An RMPP header.
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*/
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static inline u8 ib_get_rmpp_resptime(struct ib_rmpp_hdr *rmpp_hdr)
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{
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return rmpp_hdr->rmpp_rtime_flags >> 3;
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}
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/**
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* ib_get_rmpp_flags - Returns the RMPP flags.
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* @rmpp_hdr: An RMPP header.
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*/
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static inline u8 ib_get_rmpp_flags(struct ib_rmpp_hdr *rmpp_hdr)
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{
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return rmpp_hdr->rmpp_rtime_flags & 0x7;
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}
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/**
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* ib_set_rmpp_resptime - Sets the response time in an RMPP header.
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* @rmpp_hdr: An RMPP header.
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* @rtime: The response time to set.
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*/
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static inline void ib_set_rmpp_resptime(struct ib_rmpp_hdr *rmpp_hdr, u8 rtime)
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{
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rmpp_hdr->rmpp_rtime_flags = ib_get_rmpp_flags(rmpp_hdr) | (rtime << 3);
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}
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/**
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* ib_set_rmpp_flags - Sets the flags in an RMPP header.
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* @rmpp_hdr: An RMPP header.
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* @flags: The flags to set.
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*/
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static inline void ib_set_rmpp_flags(struct ib_rmpp_hdr *rmpp_hdr, u8 flags)
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{
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rmpp_hdr->rmpp_rtime_flags = (rmpp_hdr->rmpp_rtime_flags & 0xF1) |
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(flags & 0x7);
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}
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struct ib_mad_agent;
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struct ib_mad_send_wc;
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struct ib_mad_recv_wc;
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/**
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* ib_mad_send_handler - callback handler for a sent MAD.
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* @mad_agent: MAD agent that sent the MAD.
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* @mad_send_wc: Send work completion information on the sent MAD.
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*/
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typedef void (*ib_mad_send_handler)(struct ib_mad_agent *mad_agent,
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struct ib_mad_send_wc *mad_send_wc);
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/**
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* ib_mad_snoop_handler - Callback handler for snooping sent MADs.
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* @mad_agent: MAD agent that snooped the MAD.
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* @send_wr: Work request information on the sent MAD.
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* @mad_send_wc: Work completion information on the sent MAD. Valid
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* only for snooping that occurs on a send completion.
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*
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* Clients snooping MADs should not modify data referenced by the @send_wr
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* or @mad_send_wc.
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*/
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typedef void (*ib_mad_snoop_handler)(struct ib_mad_agent *mad_agent,
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struct ib_mad_send_buf *send_buf,
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struct ib_mad_send_wc *mad_send_wc);
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/**
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* ib_mad_recv_handler - callback handler for a received MAD.
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* @mad_agent: MAD agent requesting the received MAD.
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* @mad_recv_wc: Received work completion information on the received MAD.
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*
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* MADs received in response to a send request operation will be handed to
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* the user before the send operation completes. All data buffers given
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* to registered agents through this routine are owned by the receiving
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* client, except for snooping agents. Clients snooping MADs should not
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* modify the data referenced by @mad_recv_wc.
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*/
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typedef void (*ib_mad_recv_handler)(struct ib_mad_agent *mad_agent,
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struct ib_mad_recv_wc *mad_recv_wc);
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/**
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* ib_mad_agent - Used to track MAD registration with the access layer.
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* @device: Reference to device registration is on.
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* @qp: Reference to QP used for sending and receiving MADs.
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* @mr: Memory region for system memory usable for DMA.
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* @recv_handler: Callback handler for a received MAD.
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* @send_handler: Callback handler for a sent MAD.
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* @snoop_handler: Callback handler for snooped sent MADs.
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* @context: User-specified context associated with this registration.
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* @hi_tid: Access layer assigned transaction ID for this client.
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* Unsolicited MADs sent by this client will have the upper 32-bits
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* of their TID set to this value.
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* @port_num: Port number on which QP is registered
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* @rmpp_version: If set, indicates the RMPP version used by this agent.
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*/
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struct ib_mad_agent {
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struct ib_device *device;
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struct ib_qp *qp;
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struct ib_mr *mr;
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ib_mad_recv_handler recv_handler;
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ib_mad_send_handler send_handler;
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ib_mad_snoop_handler snoop_handler;
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void *context;
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u32 hi_tid;
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u8 port_num;
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u8 rmpp_version;
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};
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/**
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* ib_mad_send_wc - MAD send completion information.
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* @send_buf: Send MAD data buffer associated with the send MAD request.
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* @status: Completion status.
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* @vendor_err: Optional vendor error information returned with a failed
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* request.
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*/
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struct ib_mad_send_wc {
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struct ib_mad_send_buf *send_buf;
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enum ib_wc_status status;
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u32 vendor_err;
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};
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/**
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* ib_mad_recv_buf - received MAD buffer information.
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* @list: Reference to next data buffer for a received RMPP MAD.
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* @grh: References a data buffer containing the global route header.
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* The data refereced by this buffer is only valid if the GRH is
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* valid.
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* @mad: References the start of the received MAD.
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*/
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struct ib_mad_recv_buf {
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struct list_head list;
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struct ib_grh *grh;
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struct ib_mad *mad;
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};
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/**
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* ib_mad_recv_wc - received MAD information.
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* @wc: Completion information for the received data.
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* @recv_buf: Specifies the location of the received data buffer(s).
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* @rmpp_list: Specifies a list of RMPP reassembled received MAD buffers.
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* @mad_len: The length of the received MAD, without duplicated headers.
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*
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* For received response, the wr_id contains a pointer to the ib_mad_send_buf
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* for the corresponding send request.
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*/
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struct ib_mad_recv_wc {
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struct ib_wc *wc;
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struct ib_mad_recv_buf recv_buf;
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struct list_head rmpp_list;
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int mad_len;
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};
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/**
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* ib_mad_reg_req - MAD registration request
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* @mgmt_class: Indicates which management class of MADs should be receive
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* by the caller. This field is only required if the user wishes to
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* receive unsolicited MADs, otherwise it should be 0.
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* @mgmt_class_version: Indicates which version of MADs for the given
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* management class to receive.
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* @oui: Indicates IEEE OUI when mgmt_class is a vendor class
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* in the range from 0x30 to 0x4f. Otherwise not used.
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* @method_mask: The caller will receive unsolicited MADs for any method
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* where @method_mask = 1.
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*/
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struct ib_mad_reg_req {
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u8 mgmt_class;
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u8 mgmt_class_version;
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u8 oui[3];
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DECLARE_BITMAP(method_mask, IB_MGMT_MAX_METHODS);
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};
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/**
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* ib_register_mad_agent - Register to send/receive MADs.
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* @device: The device to register with.
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* @port_num: The port on the specified device to use.
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* @qp_type: Specifies which QP to access. Must be either
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* IB_QPT_SMI or IB_QPT_GSI.
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* @mad_reg_req: Specifies which unsolicited MADs should be received
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* by the caller. This parameter may be NULL if the caller only
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* wishes to receive solicited responses.
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* @rmpp_version: If set, indicates that the client will send
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* and receive MADs that contain the RMPP header for the given version.
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* If set to 0, indicates that RMPP is not used by this client.
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* @send_handler: The completion callback routine invoked after a send
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* request has completed.
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* @recv_handler: The completion callback routine invoked for a received
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* MAD.
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* @context: User specified context associated with the registration.
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*/
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struct ib_mad_agent *ib_register_mad_agent(struct ib_device *device,
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u8 port_num,
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enum ib_qp_type qp_type,
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struct ib_mad_reg_req *mad_reg_req,
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u8 rmpp_version,
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ib_mad_send_handler send_handler,
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ib_mad_recv_handler recv_handler,
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void *context);
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enum ib_mad_snoop_flags {
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/*IB_MAD_SNOOP_POSTED_SENDS = 1,*/
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/*IB_MAD_SNOOP_RMPP_SENDS = (1<<1),*/
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IB_MAD_SNOOP_SEND_COMPLETIONS = (1<<2),
|
|
/*IB_MAD_SNOOP_RMPP_SEND_COMPLETIONS = (1<<3),*/
|
|
IB_MAD_SNOOP_RECVS = (1<<4)
|
|
/*IB_MAD_SNOOP_RMPP_RECVS = (1<<5),*/
|
|
/*IB_MAD_SNOOP_REDIRECTED_QPS = (1<<6)*/
|
|
};
|
|
|
|
/**
|
|
* ib_register_mad_snoop - Register to snoop sent and received MADs.
|
|
* @device: The device to register with.
|
|
* @port_num: The port on the specified device to use.
|
|
* @qp_type: Specifies which QP traffic to snoop. Must be either
|
|
* IB_QPT_SMI or IB_QPT_GSI.
|
|
* @mad_snoop_flags: Specifies information where snooping occurs.
|
|
* @send_handler: The callback routine invoked for a snooped send.
|
|
* @recv_handler: The callback routine invoked for a snooped receive.
|
|
* @context: User specified context associated with the registration.
|
|
*/
|
|
struct ib_mad_agent *ib_register_mad_snoop(struct ib_device *device,
|
|
u8 port_num,
|
|
enum ib_qp_type qp_type,
|
|
int mad_snoop_flags,
|
|
ib_mad_snoop_handler snoop_handler,
|
|
ib_mad_recv_handler recv_handler,
|
|
void *context);
|
|
|
|
/**
|
|
* ib_unregister_mad_agent - Unregisters a client from using MAD services.
|
|
* @mad_agent: Corresponding MAD registration request to deregister.
|
|
*
|
|
* After invoking this routine, MAD services are no longer usable by the
|
|
* client on the associated QP.
|
|
*/
|
|
int ib_unregister_mad_agent(struct ib_mad_agent *mad_agent);
|
|
|
|
/**
|
|
* ib_post_send_mad - Posts MAD(s) to the send queue of the QP associated
|
|
* with the registered client.
|
|
* @send_buf: Specifies the information needed to send the MAD(s).
|
|
* @bad_send_buf: Specifies the MAD on which an error was encountered. This
|
|
* parameter is optional if only a single MAD is posted.
|
|
*
|
|
* Sent MADs are not guaranteed to complete in the order that they were posted.
|
|
*
|
|
* If the MAD requires RMPP, the data buffer should contain a single copy
|
|
* of the common MAD, RMPP, and class specific headers, followed by the class
|
|
* defined data. If the class defined data would not divide evenly into
|
|
* RMPP segments, then space must be allocated at the end of the referenced
|
|
* buffer for any required padding. To indicate the amount of class defined
|
|
* data being transferred, the paylen_newwin field in the RMPP header should
|
|
* be set to the size of the class specific header plus the amount of class
|
|
* defined data being transferred. The paylen_newwin field should be
|
|
* specified in network-byte order.
|
|
*/
|
|
int ib_post_send_mad(struct ib_mad_send_buf *send_buf,
|
|
struct ib_mad_send_buf **bad_send_buf);
|
|
|
|
|
|
/**
|
|
* ib_free_recv_mad - Returns data buffers used to receive a MAD.
|
|
* @mad_recv_wc: Work completion information for a received MAD.
|
|
*
|
|
* Clients receiving MADs through their ib_mad_recv_handler must call this
|
|
* routine to return the work completion buffers to the access layer.
|
|
*/
|
|
void ib_free_recv_mad(struct ib_mad_recv_wc *mad_recv_wc);
|
|
|
|
/**
|
|
* ib_cancel_mad - Cancels an outstanding send MAD operation.
|
|
* @mad_agent: Specifies the registration associated with sent MAD.
|
|
* @send_buf: Indicates the MAD to cancel.
|
|
*
|
|
* MADs will be returned to the user through the corresponding
|
|
* ib_mad_send_handler.
|
|
*/
|
|
void ib_cancel_mad(struct ib_mad_agent *mad_agent,
|
|
struct ib_mad_send_buf *send_buf);
|
|
|
|
/**
|
|
* ib_modify_mad - Modifies an outstanding send MAD operation.
|
|
* @mad_agent: Specifies the registration associated with sent MAD.
|
|
* @send_buf: Indicates the MAD to modify.
|
|
* @timeout_ms: New timeout value for sent MAD.
|
|
*
|
|
* This call will reset the timeout value for a sent MAD to the specified
|
|
* value.
|
|
*/
|
|
int ib_modify_mad(struct ib_mad_agent *mad_agent,
|
|
struct ib_mad_send_buf *send_buf, u32 timeout_ms);
|
|
|
|
/**
|
|
* ib_redirect_mad_qp - Registers a QP for MAD services.
|
|
* @qp: Reference to a QP that requires MAD services.
|
|
* @rmpp_version: If set, indicates that the client will send
|
|
* and receive MADs that contain the RMPP header for the given version.
|
|
* If set to 0, indicates that RMPP is not used by this client.
|
|
* @send_handler: The completion callback routine invoked after a send
|
|
* request has completed.
|
|
* @recv_handler: The completion callback routine invoked for a received
|
|
* MAD.
|
|
* @context: User specified context associated with the registration.
|
|
*
|
|
* Use of this call allows clients to use MAD services, such as RMPP,
|
|
* on user-owned QPs. After calling this routine, users may send
|
|
* MADs on the specified QP by calling ib_mad_post_send.
|
|
*/
|
|
struct ib_mad_agent *ib_redirect_mad_qp(struct ib_qp *qp,
|
|
u8 rmpp_version,
|
|
ib_mad_send_handler send_handler,
|
|
ib_mad_recv_handler recv_handler,
|
|
void *context);
|
|
|
|
/**
|
|
* ib_process_mad_wc - Processes a work completion associated with a
|
|
* MAD sent or received on a redirected QP.
|
|
* @mad_agent: Specifies the registered MAD service using the redirected QP.
|
|
* @wc: References a work completion associated with a sent or received
|
|
* MAD segment.
|
|
*
|
|
* This routine is used to complete or continue processing on a MAD request.
|
|
* If the work completion is associated with a send operation, calling
|
|
* this routine is required to continue an RMPP transfer or to wait for a
|
|
* corresponding response, if it is a request. If the work completion is
|
|
* associated with a receive operation, calling this routine is required to
|
|
* process an inbound or outbound RMPP transfer, or to match a response MAD
|
|
* with its corresponding request.
|
|
*/
|
|
int ib_process_mad_wc(struct ib_mad_agent *mad_agent,
|
|
struct ib_wc *wc);
|
|
|
|
/**
|
|
* ib_create_send_mad - Allocate and initialize a data buffer and work request
|
|
* for sending a MAD.
|
|
* @mad_agent: Specifies the registered MAD service to associate with the MAD.
|
|
* @remote_qpn: Specifies the QPN of the receiving node.
|
|
* @pkey_index: Specifies which PKey the MAD will be sent using. This field
|
|
* is valid only if the remote_qpn is QP 1.
|
|
* @rmpp_active: Indicates if the send will enable RMPP.
|
|
* @hdr_len: Indicates the size of the data header of the MAD. This length
|
|
* should include the common MAD header, RMPP header, plus any class
|
|
* specific header.
|
|
* @data_len: Indicates the size of any user-transferred data. The call will
|
|
* automatically adjust the allocated buffer size to account for any
|
|
* additional padding that may be necessary.
|
|
* @gfp_mask: GFP mask used for the memory allocation.
|
|
*
|
|
* This routine allocates a MAD for sending. The returned MAD send buffer
|
|
* will reference a data buffer usable for sending a MAD, along
|
|
* with an initialized work request structure. Users may modify the returned
|
|
* MAD data buffer before posting the send.
|
|
*
|
|
* The returned MAD header, class specific headers, and any padding will be
|
|
* cleared. Users are responsible for initializing the common MAD header,
|
|
* any class specific header, and MAD data area.
|
|
* If @rmpp_active is set, the RMPP header will be initialized for sending.
|
|
*/
|
|
struct ib_mad_send_buf * ib_create_send_mad(struct ib_mad_agent *mad_agent,
|
|
u32 remote_qpn, u16 pkey_index,
|
|
int rmpp_active,
|
|
int hdr_len, int data_len,
|
|
gfp_t gfp_mask);
|
|
|
|
/**
|
|
* ib_is_mad_class_rmpp - returns whether given management class
|
|
* supports RMPP.
|
|
* @mgmt_class: management class
|
|
*
|
|
* This routine returns whether the management class supports RMPP.
|
|
*/
|
|
int ib_is_mad_class_rmpp(u8 mgmt_class);
|
|
|
|
/**
|
|
* ib_get_mad_data_offset - returns the data offset for a given
|
|
* management class.
|
|
* @mgmt_class: management class
|
|
*
|
|
* This routine returns the data offset in the MAD for the management
|
|
* class requested.
|
|
*/
|
|
int ib_get_mad_data_offset(u8 mgmt_class);
|
|
|
|
/**
|
|
* ib_get_rmpp_segment - returns the data buffer for a given RMPP segment.
|
|
* @send_buf: Previously allocated send data buffer.
|
|
* @seg_num: number of segment to return
|
|
*
|
|
* This routine returns a pointer to the data buffer of an RMPP MAD.
|
|
* Users must provide synchronization to @send_buf around this call.
|
|
*/
|
|
void *ib_get_rmpp_segment(struct ib_mad_send_buf *send_buf, int seg_num);
|
|
|
|
/**
|
|
* ib_free_send_mad - Returns data buffers used to send a MAD.
|
|
* @send_buf: Previously allocated send data buffer.
|
|
*/
|
|
void ib_free_send_mad(struct ib_mad_send_buf *send_buf);
|
|
|
|
#endif /* IB_MAD_H */
|