34816ad98e
The MAD layer was violating the DMA API by touching data buffers used for sends after the DMA mapping was done. This causes problems on non-cache-coherent architectures, because the device doing DMA won't see updates to the payload buffers that exist only in the CPU cache. Fix this by having all MAD consumers use ib_create_send_mad() to allocate their send buffers, and moving the DMA mapping into the MAD layer so it can be done just before calling send (and after any modifications of the send buffer by the MAD layer). Tested on a non-cache-coherent PowerPC 440SPe system. Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
610 lines
21 KiB
C
610 lines
21 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 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 2775 2005-07-02 13:42:12Z halr $
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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/pci.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_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_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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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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};
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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.
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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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* @timeout_ms: Time to wait for a response.
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* @retries: Number of times to retry a request for a response.
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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 specifying the payload length field in any RMPP MAD.
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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 timeout_ms;
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int retries;
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};
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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 after 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),
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/*IB_MAD_SNOOP_RMPP_SEND_COMPLETIONS = (1<<3),*/
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IB_MAD_SNOOP_RECVS = (1<<4)
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/*IB_MAD_SNOOP_RMPP_RECVS = (1<<5),*/
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/*IB_MAD_SNOOP_REDIRECTED_QPS = (1<<6)*/
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};
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/**
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* ib_register_mad_snoop - Register to snoop sent and received 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 traffic to snoop. Must be either
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* IB_QPT_SMI or IB_QPT_GSI.
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* @mad_snoop_flags: Specifies information where snooping occurs.
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* @send_handler: The callback routine invoked for a snooped send.
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* @recv_handler: The callback routine invoked for a snooped receive.
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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_snoop(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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int mad_snoop_flags,
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ib_mad_snoop_handler snoop_handler,
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ib_mad_recv_handler recv_handler,
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void *context);
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/**
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* ib_unregister_mad_agent - Unregisters a client from using MAD services.
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* @mad_agent: Corresponding MAD registration request to deregister.
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*
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* After invoking this routine, MAD services are no longer usable by the
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* client on the associated QP.
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*/
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int ib_unregister_mad_agent(struct ib_mad_agent *mad_agent);
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/**
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* ib_post_send_mad - Posts MAD(s) to the send queue of the QP associated
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* with the registered client.
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* @send_buf: Specifies the information needed to send the MAD(s).
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* @bad_send_buf: Specifies the MAD on which an error was encountered. This
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* parameter is optional if only a single MAD is posted.
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*
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* Sent MADs are not guaranteed to complete in the order that they were posted.
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*
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* If the MAD requires RMPP, the data buffer should contain a single copy
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* of the common MAD, RMPP, and class specific headers, followed by the class
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* defined data. If the class defined data would not divide evenly into
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* RMPP segments, then space must be allocated at the end of the referenced
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* buffer for any required padding. To indicate the amount of class defined
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* data being transferred, the paylen_newwin field in the RMPP header should
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* be set to the size of the class specific header plus the amount of class
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* defined data being transferred. The paylen_newwin field should be
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* specified in network-byte order.
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*/
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int ib_post_send_mad(struct ib_mad_send_buf *send_buf,
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struct ib_mad_send_buf **bad_send_buf);
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/**
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* ib_coalesce_recv_mad - Coalesces received MAD data into a single buffer.
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* @mad_recv_wc: Work completion information for a received MAD.
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* @buf: User-provided data buffer to receive the coalesced buffers. The
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* referenced buffer should be at least the size of the mad_len specified
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* by @mad_recv_wc.
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*
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* This call copies a chain of received MAD segments into a single data buffer,
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* removing duplicated headers.
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*/
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void ib_coalesce_recv_mad(struct ib_mad_recv_wc *mad_recv_wc, void *buf);
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/**
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* ib_free_recv_mad - Returns data buffers used to receive a MAD.
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* @mad_recv_wc: Work completion information for a received MAD.
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*
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* Clients receiving MADs through their ib_mad_recv_handler must call this
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* routine to return the work completion buffers to the access layer.
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*/
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void ib_free_recv_mad(struct ib_mad_recv_wc *mad_recv_wc);
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/**
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* ib_cancel_mad - Cancels an outstanding send MAD operation.
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* @mad_agent: Specifies the registration associated with sent MAD.
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* @send_buf: Indicates the MAD to cancel.
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*
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* MADs will be returned to the user through the corresponding
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* ib_mad_send_handler.
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*/
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void ib_cancel_mad(struct ib_mad_agent *mad_agent,
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struct ib_mad_send_buf *send_buf);
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/**
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* ib_modify_mad - Modifies an outstanding send MAD operation.
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* @mad_agent: Specifies the registration associated with sent MAD.
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* @send_buf: Indicates the MAD to modify.
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* @timeout_ms: New timeout value for sent MAD.
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*
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* This call will reset the timeout value for a sent MAD to the specified
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* value.
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*/
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int ib_modify_mad(struct ib_mad_agent *mad_agent,
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struct ib_mad_send_buf *send_buf, u32 timeout_ms);
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/**
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* ib_redirect_mad_qp - Registers a QP for MAD services.
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* @qp: Reference to a QP that requires MAD services.
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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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* Use of this call allows clients to use MAD services, such as RMPP,
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* on user-owned QPs. After calling this routine, users may send
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* MADs on the specified QP by calling ib_mad_post_send.
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*/
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struct ib_mad_agent *ib_redirect_mad_qp(struct ib_qp *qp,
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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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/**
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* ib_process_mad_wc - Processes a work completion associated with a
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* MAD sent or received on a redirected QP.
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* @mad_agent: Specifies the registered MAD service using the redirected QP.
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* @wc: References a work completion associated with a sent or received
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* MAD segment.
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*
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* This routine is used to complete or continue processing on a MAD request.
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* If the work completion is associated with a send operation, calling
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* this routine is required to continue an RMPP transfer or to wait for a
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* corresponding response, if it is a request. If the work completion is
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* associated with a receive operation, calling this routine is required to
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* process an inbound or outbound RMPP transfer, or to match a response MAD
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* with its corresponding request.
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*/
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int ib_process_mad_wc(struct ib_mad_agent *mad_agent,
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struct ib_wc *wc);
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/**
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* ib_create_send_mad - Allocate and initialize a data buffer and work request
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* for sending a MAD.
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* @mad_agent: Specifies the registered MAD service to associate with the MAD.
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* @remote_qpn: Specifies the QPN of the receiving node.
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* @pkey_index: Specifies which PKey the MAD will be sent using. This field
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* is valid only if the remote_qpn is QP 1.
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* @rmpp_active: Indicates if the send will enable RMPP.
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* @hdr_len: Indicates the size of the data header of the MAD. This length
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* should include the common MAD header, RMPP header, plus any class
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* specific header.
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* @data_len: Indicates the size of any user-transferred data. The call will
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* automatically adjust the allocated buffer size to account for any
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* additional padding that may be necessary.
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* @gfp_mask: GFP mask used for the memory allocation.
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*
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* This routine allocates a MAD for sending. The returned MAD send buffer
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* will reference a data buffer usable for sending a MAD, along
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* with an initialized work request structure. Users may modify the returned
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* MAD data buffer before posting the send.
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*
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* The returned data buffer will be cleared. Users are responsible for
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* initializing the common MAD and any class specific headers. If @rmpp_active
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* is set, the RMPP header will be initialized for sending.
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*/
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struct ib_mad_send_buf * ib_create_send_mad(struct ib_mad_agent *mad_agent,
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u32 remote_qpn, u16 pkey_index,
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int rmpp_active,
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int hdr_len, int data_len,
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gfp_t gfp_mask);
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/**
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* ib_free_send_mad - Returns data buffers used to send a MAD.
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* @send_buf: Previously allocated send data buffer.
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*/
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void ib_free_send_mad(struct ib_mad_send_buf *send_buf);
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#endif /* IB_MAD_H */
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