| /* |
| * Copyright (c) 2004 Topspin Corporation. All rights reserved. |
| * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. |
| * |
| * This software is available to you under a choice of one of two |
| * licenses. You may choose to be licensed under the terms of the GNU |
| * General Public License (GPL) Version 2, available from the file |
| * COPYING in the main directory of this source tree, or the |
| * OpenIB.org BSD license below: |
| * |
| * Redistribution and use in source and binary forms, with or |
| * without modification, are permitted provided that the following |
| * conditions are met: |
| * |
| * - Redistributions of source code must retain the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer. |
| * |
| * - Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer in the documentation and/or other materials |
| * provided with the distribution. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| * SOFTWARE. |
| */ |
| |
| #include <linux/errno.h> |
| #include <linux/string.h> |
| #include <linux/export.h> |
| #include <linux/if_ether.h> |
| |
| #include <rdma/ib_pack.h> |
| |
| #define STRUCT_FIELD(header, field) \ |
| .struct_offset_bytes = offsetof(struct ib_unpacked_ ## header, field), \ |
| .struct_size_bytes = sizeof ((struct ib_unpacked_ ## header *) 0)->field, \ |
| .field_name = #header ":" #field |
| |
| static const struct ib_field lrh_table[] = { |
| { STRUCT_FIELD(lrh, virtual_lane), |
| .offset_words = 0, |
| .offset_bits = 0, |
| .size_bits = 4 }, |
| { STRUCT_FIELD(lrh, link_version), |
| .offset_words = 0, |
| .offset_bits = 4, |
| .size_bits = 4 }, |
| { STRUCT_FIELD(lrh, service_level), |
| .offset_words = 0, |
| .offset_bits = 8, |
| .size_bits = 4 }, |
| { RESERVED, |
| .offset_words = 0, |
| .offset_bits = 12, |
| .size_bits = 2 }, |
| { STRUCT_FIELD(lrh, link_next_header), |
| .offset_words = 0, |
| .offset_bits = 14, |
| .size_bits = 2 }, |
| { STRUCT_FIELD(lrh, destination_lid), |
| .offset_words = 0, |
| .offset_bits = 16, |
| .size_bits = 16 }, |
| { RESERVED, |
| .offset_words = 1, |
| .offset_bits = 0, |
| .size_bits = 5 }, |
| { STRUCT_FIELD(lrh, packet_length), |
| .offset_words = 1, |
| .offset_bits = 5, |
| .size_bits = 11 }, |
| { STRUCT_FIELD(lrh, source_lid), |
| .offset_words = 1, |
| .offset_bits = 16, |
| .size_bits = 16 } |
| }; |
| |
| static const struct ib_field eth_table[] = { |
| { STRUCT_FIELD(eth, dmac_h), |
| .offset_words = 0, |
| .offset_bits = 0, |
| .size_bits = 32 }, |
| { STRUCT_FIELD(eth, dmac_l), |
| .offset_words = 1, |
| .offset_bits = 0, |
| .size_bits = 16 }, |
| { STRUCT_FIELD(eth, smac_h), |
| .offset_words = 1, |
| .offset_bits = 16, |
| .size_bits = 16 }, |
| { STRUCT_FIELD(eth, smac_l), |
| .offset_words = 2, |
| .offset_bits = 0, |
| .size_bits = 32 }, |
| { STRUCT_FIELD(eth, type), |
| .offset_words = 3, |
| .offset_bits = 0, |
| .size_bits = 16 } |
| }; |
| |
| static const struct ib_field vlan_table[] = { |
| { STRUCT_FIELD(vlan, tag), |
| .offset_words = 0, |
| .offset_bits = 0, |
| .size_bits = 16 }, |
| { STRUCT_FIELD(vlan, type), |
| .offset_words = 0, |
| .offset_bits = 16, |
| .size_bits = 16 } |
| }; |
| |
| static const struct ib_field grh_table[] = { |
| { STRUCT_FIELD(grh, ip_version), |
| .offset_words = 0, |
| .offset_bits = 0, |
| .size_bits = 4 }, |
| { STRUCT_FIELD(grh, traffic_class), |
| .offset_words = 0, |
| .offset_bits = 4, |
| .size_bits = 8 }, |
| { STRUCT_FIELD(grh, flow_label), |
| .offset_words = 0, |
| .offset_bits = 12, |
| .size_bits = 20 }, |
| { STRUCT_FIELD(grh, payload_length), |
| .offset_words = 1, |
| .offset_bits = 0, |
| .size_bits = 16 }, |
| { STRUCT_FIELD(grh, next_header), |
| .offset_words = 1, |
| .offset_bits = 16, |
| .size_bits = 8 }, |
| { STRUCT_FIELD(grh, hop_limit), |
| .offset_words = 1, |
| .offset_bits = 24, |
| .size_bits = 8 }, |
| { STRUCT_FIELD(grh, source_gid), |
| .offset_words = 2, |
| .offset_bits = 0, |
| .size_bits = 128 }, |
| { STRUCT_FIELD(grh, destination_gid), |
| .offset_words = 6, |
| .offset_bits = 0, |
| .size_bits = 128 } |
| }; |
| |
| static const struct ib_field bth_table[] = { |
| { STRUCT_FIELD(bth, opcode), |
| .offset_words = 0, |
| .offset_bits = 0, |
| .size_bits = 8 }, |
| { STRUCT_FIELD(bth, solicited_event), |
| .offset_words = 0, |
| .offset_bits = 8, |
| .size_bits = 1 }, |
| { STRUCT_FIELD(bth, mig_req), |
| .offset_words = 0, |
| .offset_bits = 9, |
| .size_bits = 1 }, |
| { STRUCT_FIELD(bth, pad_count), |
| .offset_words = 0, |
| .offset_bits = 10, |
| .size_bits = 2 }, |
| { STRUCT_FIELD(bth, transport_header_version), |
| .offset_words = 0, |
| .offset_bits = 12, |
| .size_bits = 4 }, |
| { STRUCT_FIELD(bth, pkey), |
| .offset_words = 0, |
| .offset_bits = 16, |
| .size_bits = 16 }, |
| { RESERVED, |
| .offset_words = 1, |
| .offset_bits = 0, |
| .size_bits = 8 }, |
| { STRUCT_FIELD(bth, destination_qpn), |
| .offset_words = 1, |
| .offset_bits = 8, |
| .size_bits = 24 }, |
| { STRUCT_FIELD(bth, ack_req), |
| .offset_words = 2, |
| .offset_bits = 0, |
| .size_bits = 1 }, |
| { RESERVED, |
| .offset_words = 2, |
| .offset_bits = 1, |
| .size_bits = 7 }, |
| { STRUCT_FIELD(bth, psn), |
| .offset_words = 2, |
| .offset_bits = 8, |
| .size_bits = 24 } |
| }; |
| |
| static const struct ib_field deth_table[] = { |
| { STRUCT_FIELD(deth, qkey), |
| .offset_words = 0, |
| .offset_bits = 0, |
| .size_bits = 32 }, |
| { RESERVED, |
| .offset_words = 1, |
| .offset_bits = 0, |
| .size_bits = 8 }, |
| { STRUCT_FIELD(deth, source_qpn), |
| .offset_words = 1, |
| .offset_bits = 8, |
| .size_bits = 24 } |
| }; |
| |
| /** |
| * ib_ud_header_init - Initialize UD header structure |
| * @payload_bytes:Length of packet payload |
| * @lrh_present: specify if LRH is present |
| * @eth_present: specify if Eth header is present |
| * @vlan_present: packet is tagged vlan |
| * @grh_present:GRH flag (if non-zero, GRH will be included) |
| * @immediate_present: specify if immediate data is present |
| * @header:Structure to initialize |
| */ |
| void ib_ud_header_init(int payload_bytes, |
| int lrh_present, |
| int eth_present, |
| int vlan_present, |
| int grh_present, |
| int immediate_present, |
| struct ib_ud_header *header) |
| { |
| memset(header, 0, sizeof *header); |
| |
| if (lrh_present) { |
| u16 packet_length; |
| |
| header->lrh.link_version = 0; |
| header->lrh.link_next_header = |
| grh_present ? IB_LNH_IBA_GLOBAL : IB_LNH_IBA_LOCAL; |
| packet_length = (IB_LRH_BYTES + |
| IB_BTH_BYTES + |
| IB_DETH_BYTES + |
| (grh_present ? IB_GRH_BYTES : 0) + |
| payload_bytes + |
| 4 + /* ICRC */ |
| 3) / 4; /* round up */ |
| header->lrh.packet_length = cpu_to_be16(packet_length); |
| } |
| |
| if (vlan_present) |
| header->eth.type = cpu_to_be16(ETH_P_8021Q); |
| |
| if (grh_present) { |
| header->grh.ip_version = 6; |
| header->grh.payload_length = |
| cpu_to_be16((IB_BTH_BYTES + |
| IB_DETH_BYTES + |
| payload_bytes + |
| 4 + /* ICRC */ |
| 3) & ~3); /* round up */ |
| header->grh.next_header = 0x1b; |
| } |
| |
| if (immediate_present) |
| header->bth.opcode = IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE; |
| else |
| header->bth.opcode = IB_OPCODE_UD_SEND_ONLY; |
| header->bth.pad_count = (4 - payload_bytes) & 3; |
| header->bth.transport_header_version = 0; |
| |
| header->lrh_present = lrh_present; |
| header->eth_present = eth_present; |
| header->vlan_present = vlan_present; |
| header->grh_present = grh_present; |
| header->immediate_present = immediate_present; |
| } |
| EXPORT_SYMBOL(ib_ud_header_init); |
| |
| /** |
| * ib_ud_header_pack - Pack UD header struct into wire format |
| * @header:UD header struct |
| * @buf:Buffer to pack into |
| * |
| * ib_ud_header_pack() packs the UD header structure @header into wire |
| * format in the buffer @buf. |
| */ |
| int ib_ud_header_pack(struct ib_ud_header *header, |
| void *buf) |
| { |
| int len = 0; |
| |
| if (header->lrh_present) { |
| ib_pack(lrh_table, ARRAY_SIZE(lrh_table), |
| &header->lrh, buf + len); |
| len += IB_LRH_BYTES; |
| } |
| if (header->eth_present) { |
| ib_pack(eth_table, ARRAY_SIZE(eth_table), |
| &header->eth, buf + len); |
| len += IB_ETH_BYTES; |
| } |
| if (header->vlan_present) { |
| ib_pack(vlan_table, ARRAY_SIZE(vlan_table), |
| &header->vlan, buf + len); |
| len += IB_VLAN_BYTES; |
| } |
| if (header->grh_present) { |
| ib_pack(grh_table, ARRAY_SIZE(grh_table), |
| &header->grh, buf + len); |
| len += IB_GRH_BYTES; |
| } |
| |
| ib_pack(bth_table, ARRAY_SIZE(bth_table), |
| &header->bth, buf + len); |
| len += IB_BTH_BYTES; |
| |
| ib_pack(deth_table, ARRAY_SIZE(deth_table), |
| &header->deth, buf + len); |
| len += IB_DETH_BYTES; |
| |
| if (header->immediate_present) { |
| memcpy(buf + len, &header->immediate_data, sizeof header->immediate_data); |
| len += sizeof header->immediate_data; |
| } |
| |
| return len; |
| } |
| EXPORT_SYMBOL(ib_ud_header_pack); |
| |
| /** |
| * ib_ud_header_unpack - Unpack UD header struct from wire format |
| * @header:UD header struct |
| * @buf:Buffer to pack into |
| * |
| * ib_ud_header_pack() unpacks the UD header structure @header from wire |
| * format in the buffer @buf. |
| */ |
| int ib_ud_header_unpack(void *buf, |
| struct ib_ud_header *header) |
| { |
| ib_unpack(lrh_table, ARRAY_SIZE(lrh_table), |
| buf, &header->lrh); |
| buf += IB_LRH_BYTES; |
| |
| if (header->lrh.link_version != 0) { |
| printk(KERN_WARNING "Invalid LRH.link_version %d\n", |
| header->lrh.link_version); |
| return -EINVAL; |
| } |
| |
| switch (header->lrh.link_next_header) { |
| case IB_LNH_IBA_LOCAL: |
| header->grh_present = 0; |
| break; |
| |
| case IB_LNH_IBA_GLOBAL: |
| header->grh_present = 1; |
| ib_unpack(grh_table, ARRAY_SIZE(grh_table), |
| buf, &header->grh); |
| buf += IB_GRH_BYTES; |
| |
| if (header->grh.ip_version != 6) { |
| printk(KERN_WARNING "Invalid GRH.ip_version %d\n", |
| header->grh.ip_version); |
| return -EINVAL; |
| } |
| if (header->grh.next_header != 0x1b) { |
| printk(KERN_WARNING "Invalid GRH.next_header 0x%02x\n", |
| header->grh.next_header); |
| return -EINVAL; |
| } |
| break; |
| |
| default: |
| printk(KERN_WARNING "Invalid LRH.link_next_header %d\n", |
| header->lrh.link_next_header); |
| return -EINVAL; |
| } |
| |
| ib_unpack(bth_table, ARRAY_SIZE(bth_table), |
| buf, &header->bth); |
| buf += IB_BTH_BYTES; |
| |
| switch (header->bth.opcode) { |
| case IB_OPCODE_UD_SEND_ONLY: |
| header->immediate_present = 0; |
| break; |
| case IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE: |
| header->immediate_present = 1; |
| break; |
| default: |
| printk(KERN_WARNING "Invalid BTH.opcode 0x%02x\n", |
| header->bth.opcode); |
| return -EINVAL; |
| } |
| |
| if (header->bth.transport_header_version != 0) { |
| printk(KERN_WARNING "Invalid BTH.transport_header_version %d\n", |
| header->bth.transport_header_version); |
| return -EINVAL; |
| } |
| |
| ib_unpack(deth_table, ARRAY_SIZE(deth_table), |
| buf, &header->deth); |
| buf += IB_DETH_BYTES; |
| |
| if (header->immediate_present) |
| memcpy(&header->immediate_data, buf, sizeof header->immediate_data); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(ib_ud_header_unpack); |