415 lines
11 KiB
C
415 lines
11 KiB
C
/*
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* Copyright (c) 2004 Topspin Corporation. All rights reserved.
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* Copyright (c) 2005 Sun Microsystems, Inc. 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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#include <linux/errno.h>
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#include <linux/string.h>
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#include <linux/export.h>
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#include <linux/if_ether.h>
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#include <rdma/ib_pack.h>
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#define STRUCT_FIELD(header, field) \
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.struct_offset_bytes = offsetof(struct ib_unpacked_ ## header, field), \
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.struct_size_bytes = sizeof ((struct ib_unpacked_ ## header *) 0)->field, \
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.field_name = #header ":" #field
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static const struct ib_field lrh_table[] = {
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{ STRUCT_FIELD(lrh, virtual_lane),
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.offset_words = 0,
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.offset_bits = 0,
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.size_bits = 4 },
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{ STRUCT_FIELD(lrh, link_version),
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.offset_words = 0,
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.offset_bits = 4,
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.size_bits = 4 },
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{ STRUCT_FIELD(lrh, service_level),
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.offset_words = 0,
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.offset_bits = 8,
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.size_bits = 4 },
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{ RESERVED,
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.offset_words = 0,
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.offset_bits = 12,
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.size_bits = 2 },
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{ STRUCT_FIELD(lrh, link_next_header),
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.offset_words = 0,
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.offset_bits = 14,
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.size_bits = 2 },
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{ STRUCT_FIELD(lrh, destination_lid),
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.offset_words = 0,
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.offset_bits = 16,
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.size_bits = 16 },
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{ RESERVED,
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.offset_words = 1,
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.offset_bits = 0,
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.size_bits = 5 },
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{ STRUCT_FIELD(lrh, packet_length),
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.offset_words = 1,
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.offset_bits = 5,
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.size_bits = 11 },
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{ STRUCT_FIELD(lrh, source_lid),
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.offset_words = 1,
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.offset_bits = 16,
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.size_bits = 16 }
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};
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static const struct ib_field eth_table[] = {
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{ STRUCT_FIELD(eth, dmac_h),
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.offset_words = 0,
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.offset_bits = 0,
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.size_bits = 32 },
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{ STRUCT_FIELD(eth, dmac_l),
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.offset_words = 1,
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.offset_bits = 0,
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.size_bits = 16 },
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{ STRUCT_FIELD(eth, smac_h),
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.offset_words = 1,
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.offset_bits = 16,
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.size_bits = 16 },
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{ STRUCT_FIELD(eth, smac_l),
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.offset_words = 2,
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.offset_bits = 0,
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.size_bits = 32 },
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{ STRUCT_FIELD(eth, type),
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.offset_words = 3,
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.offset_bits = 0,
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.size_bits = 16 }
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};
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static const struct ib_field vlan_table[] = {
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{ STRUCT_FIELD(vlan, tag),
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.offset_words = 0,
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.offset_bits = 0,
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.size_bits = 16 },
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{ STRUCT_FIELD(vlan, type),
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.offset_words = 0,
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.offset_bits = 16,
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.size_bits = 16 }
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};
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static const struct ib_field grh_table[] = {
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{ STRUCT_FIELD(grh, ip_version),
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.offset_words = 0,
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.offset_bits = 0,
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.size_bits = 4 },
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{ STRUCT_FIELD(grh, traffic_class),
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.offset_words = 0,
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.offset_bits = 4,
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.size_bits = 8 },
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{ STRUCT_FIELD(grh, flow_label),
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.offset_words = 0,
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.offset_bits = 12,
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.size_bits = 20 },
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{ STRUCT_FIELD(grh, payload_length),
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.offset_words = 1,
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.offset_bits = 0,
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.size_bits = 16 },
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{ STRUCT_FIELD(grh, next_header),
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.offset_words = 1,
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.offset_bits = 16,
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.size_bits = 8 },
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{ STRUCT_FIELD(grh, hop_limit),
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.offset_words = 1,
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.offset_bits = 24,
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.size_bits = 8 },
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{ STRUCT_FIELD(grh, source_gid),
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.offset_words = 2,
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.offset_bits = 0,
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.size_bits = 128 },
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{ STRUCT_FIELD(grh, destination_gid),
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.offset_words = 6,
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.offset_bits = 0,
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.size_bits = 128 }
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};
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static const struct ib_field bth_table[] = {
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{ STRUCT_FIELD(bth, opcode),
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.offset_words = 0,
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.offset_bits = 0,
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.size_bits = 8 },
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{ STRUCT_FIELD(bth, solicited_event),
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.offset_words = 0,
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.offset_bits = 8,
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.size_bits = 1 },
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{ STRUCT_FIELD(bth, mig_req),
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.offset_words = 0,
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.offset_bits = 9,
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.size_bits = 1 },
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{ STRUCT_FIELD(bth, pad_count),
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.offset_words = 0,
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.offset_bits = 10,
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.size_bits = 2 },
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{ STRUCT_FIELD(bth, transport_header_version),
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.offset_words = 0,
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.offset_bits = 12,
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.size_bits = 4 },
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{ STRUCT_FIELD(bth, pkey),
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.offset_words = 0,
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.offset_bits = 16,
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.size_bits = 16 },
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{ RESERVED,
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.offset_words = 1,
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.offset_bits = 0,
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.size_bits = 8 },
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{ STRUCT_FIELD(bth, destination_qpn),
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.offset_words = 1,
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.offset_bits = 8,
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.size_bits = 24 },
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{ STRUCT_FIELD(bth, ack_req),
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.offset_words = 2,
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.offset_bits = 0,
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.size_bits = 1 },
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{ RESERVED,
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.offset_words = 2,
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.offset_bits = 1,
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.size_bits = 7 },
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{ STRUCT_FIELD(bth, psn),
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.offset_words = 2,
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.offset_bits = 8,
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.size_bits = 24 }
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};
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static const struct ib_field deth_table[] = {
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{ STRUCT_FIELD(deth, qkey),
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.offset_words = 0,
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.offset_bits = 0,
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.size_bits = 32 },
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{ RESERVED,
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.offset_words = 1,
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.offset_bits = 0,
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.size_bits = 8 },
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{ STRUCT_FIELD(deth, source_qpn),
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.offset_words = 1,
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.offset_bits = 8,
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.size_bits = 24 }
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};
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/**
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* ib_ud_header_init - Initialize UD header structure
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* @payload_bytes:Length of packet payload
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* @lrh_present: specify if LRH is present
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* @eth_present: specify if Eth header is present
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* @vlan_present: packet is tagged vlan
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* @grh_present:GRH flag (if non-zero, GRH will be included)
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* @immediate_present: specify if immediate data is present
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* @header:Structure to initialize
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*/
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void ib_ud_header_init(int payload_bytes,
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int lrh_present,
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int eth_present,
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int vlan_present,
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int grh_present,
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int immediate_present,
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struct ib_ud_header *header)
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{
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memset(header, 0, sizeof *header);
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if (lrh_present) {
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u16 packet_length;
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header->lrh.link_version = 0;
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header->lrh.link_next_header =
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grh_present ? IB_LNH_IBA_GLOBAL : IB_LNH_IBA_LOCAL;
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packet_length = (IB_LRH_BYTES +
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IB_BTH_BYTES +
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IB_DETH_BYTES +
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(grh_present ? IB_GRH_BYTES : 0) +
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payload_bytes +
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4 + /* ICRC */
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3) / 4; /* round up */
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header->lrh.packet_length = cpu_to_be16(packet_length);
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}
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if (vlan_present)
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header->eth.type = cpu_to_be16(ETH_P_8021Q);
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if (grh_present) {
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header->grh.ip_version = 6;
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header->grh.payload_length =
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cpu_to_be16((IB_BTH_BYTES +
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IB_DETH_BYTES +
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payload_bytes +
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4 + /* ICRC */
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3) & ~3); /* round up */
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header->grh.next_header = 0x1b;
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}
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if (immediate_present)
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header->bth.opcode = IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE;
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else
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header->bth.opcode = IB_OPCODE_UD_SEND_ONLY;
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header->bth.pad_count = (4 - payload_bytes) & 3;
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header->bth.transport_header_version = 0;
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header->lrh_present = lrh_present;
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header->eth_present = eth_present;
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header->vlan_present = vlan_present;
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header->grh_present = grh_present;
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header->immediate_present = immediate_present;
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}
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EXPORT_SYMBOL(ib_ud_header_init);
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/**
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* ib_ud_header_pack - Pack UD header struct into wire format
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* @header:UD header struct
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* @buf:Buffer to pack into
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*
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* ib_ud_header_pack() packs the UD header structure @header into wire
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* format in the buffer @buf.
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*/
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int ib_ud_header_pack(struct ib_ud_header *header,
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void *buf)
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{
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int len = 0;
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if (header->lrh_present) {
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ib_pack(lrh_table, ARRAY_SIZE(lrh_table),
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&header->lrh, buf + len);
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len += IB_LRH_BYTES;
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}
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if (header->eth_present) {
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ib_pack(eth_table, ARRAY_SIZE(eth_table),
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&header->eth, buf + len);
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len += IB_ETH_BYTES;
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}
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if (header->vlan_present) {
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ib_pack(vlan_table, ARRAY_SIZE(vlan_table),
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&header->vlan, buf + len);
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len += IB_VLAN_BYTES;
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}
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if (header->grh_present) {
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ib_pack(grh_table, ARRAY_SIZE(grh_table),
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&header->grh, buf + len);
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len += IB_GRH_BYTES;
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}
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ib_pack(bth_table, ARRAY_SIZE(bth_table),
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&header->bth, buf + len);
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len += IB_BTH_BYTES;
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ib_pack(deth_table, ARRAY_SIZE(deth_table),
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&header->deth, buf + len);
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len += IB_DETH_BYTES;
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if (header->immediate_present) {
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memcpy(buf + len, &header->immediate_data, sizeof header->immediate_data);
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len += sizeof header->immediate_data;
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}
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return len;
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}
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EXPORT_SYMBOL(ib_ud_header_pack);
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/**
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* ib_ud_header_unpack - Unpack UD header struct from wire format
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* @header:UD header struct
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* @buf:Buffer to pack into
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*
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* ib_ud_header_pack() unpacks the UD header structure @header from wire
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* format in the buffer @buf.
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*/
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int ib_ud_header_unpack(void *buf,
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struct ib_ud_header *header)
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{
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ib_unpack(lrh_table, ARRAY_SIZE(lrh_table),
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buf, &header->lrh);
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buf += IB_LRH_BYTES;
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if (header->lrh.link_version != 0) {
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printk(KERN_WARNING "Invalid LRH.link_version %d\n",
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header->lrh.link_version);
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return -EINVAL;
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}
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switch (header->lrh.link_next_header) {
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case IB_LNH_IBA_LOCAL:
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header->grh_present = 0;
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break;
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case IB_LNH_IBA_GLOBAL:
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header->grh_present = 1;
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ib_unpack(grh_table, ARRAY_SIZE(grh_table),
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buf, &header->grh);
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buf += IB_GRH_BYTES;
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if (header->grh.ip_version != 6) {
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printk(KERN_WARNING "Invalid GRH.ip_version %d\n",
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header->grh.ip_version);
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return -EINVAL;
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}
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if (header->grh.next_header != 0x1b) {
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printk(KERN_WARNING "Invalid GRH.next_header 0x%02x\n",
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header->grh.next_header);
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return -EINVAL;
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}
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break;
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default:
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printk(KERN_WARNING "Invalid LRH.link_next_header %d\n",
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header->lrh.link_next_header);
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return -EINVAL;
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}
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ib_unpack(bth_table, ARRAY_SIZE(bth_table),
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buf, &header->bth);
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buf += IB_BTH_BYTES;
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switch (header->bth.opcode) {
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case IB_OPCODE_UD_SEND_ONLY:
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header->immediate_present = 0;
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break;
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case IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE:
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header->immediate_present = 1;
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break;
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default:
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printk(KERN_WARNING "Invalid BTH.opcode 0x%02x\n",
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header->bth.opcode);
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return -EINVAL;
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}
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if (header->bth.transport_header_version != 0) {
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printk(KERN_WARNING "Invalid BTH.transport_header_version %d\n",
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header->bth.transport_header_version);
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return -EINVAL;
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}
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ib_unpack(deth_table, ARRAY_SIZE(deth_table),
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buf, &header->deth);
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buf += IB_DETH_BYTES;
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if (header->immediate_present)
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memcpy(&header->immediate_data, buf, sizeof header->immediate_data);
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return 0;
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}
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EXPORT_SYMBOL(ib_ud_header_unpack);
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