2 * Copyright (c) 2004 Topspin Corporation. All rights reserved.
3 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenIB.org BSD license below:
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
34 #include <linux/errno.h>
35 #include <linux/string.h>
36 #include <linux/export.h>
37 #include <linux/if_ether.h>
40 #include <rdma/ib_pack.h>
42 #define STRUCT_FIELD(header, field) \
43 .struct_offset_bytes = offsetof(struct ib_unpacked_ ## header, field), \
44 .struct_size_bytes = sizeof ((struct ib_unpacked_ ## header *) 0)->field, \
45 .field_name = #header ":" #field
47 static const struct ib_field lrh_table[] = {
48 { STRUCT_FIELD(lrh, virtual_lane),
52 { STRUCT_FIELD(lrh, link_version),
56 { STRUCT_FIELD(lrh, service_level),
64 { STRUCT_FIELD(lrh, link_next_header),
68 { STRUCT_FIELD(lrh, destination_lid),
76 { STRUCT_FIELD(lrh, packet_length),
80 { STRUCT_FIELD(lrh, source_lid),
86 static const struct ib_field eth_table[] = {
87 { STRUCT_FIELD(eth, dmac_h),
91 { STRUCT_FIELD(eth, dmac_l),
95 { STRUCT_FIELD(eth, smac_h),
99 { STRUCT_FIELD(eth, smac_l),
103 { STRUCT_FIELD(eth, type),
109 static const struct ib_field vlan_table[] = {
110 { STRUCT_FIELD(vlan, tag),
114 { STRUCT_FIELD(vlan, type),
120 static const struct ib_field ip4_table[] = {
121 { STRUCT_FIELD(ip4, ver),
125 { STRUCT_FIELD(ip4, hdr_len),
129 { STRUCT_FIELD(ip4, tos),
133 { STRUCT_FIELD(ip4, tot_len),
137 { STRUCT_FIELD(ip4, id),
141 { STRUCT_FIELD(ip4, frag_off),
145 { STRUCT_FIELD(ip4, ttl),
149 { STRUCT_FIELD(ip4, protocol),
153 { STRUCT_FIELD(ip4, check),
157 { STRUCT_FIELD(ip4, saddr),
161 { STRUCT_FIELD(ip4, daddr),
167 static const struct ib_field udp_table[] = {
168 { STRUCT_FIELD(udp, sport),
172 { STRUCT_FIELD(udp, dport),
176 { STRUCT_FIELD(udp, length),
180 { STRUCT_FIELD(udp, csum),
186 static const struct ib_field grh_table[] = {
187 { STRUCT_FIELD(grh, ip_version),
191 { STRUCT_FIELD(grh, traffic_class),
195 { STRUCT_FIELD(grh, flow_label),
199 { STRUCT_FIELD(grh, payload_length),
203 { STRUCT_FIELD(grh, next_header),
207 { STRUCT_FIELD(grh, hop_limit),
211 { STRUCT_FIELD(grh, source_gid),
215 { STRUCT_FIELD(grh, destination_gid),
221 static const struct ib_field bth_table[] = {
222 { STRUCT_FIELD(bth, opcode),
226 { STRUCT_FIELD(bth, solicited_event),
230 { STRUCT_FIELD(bth, mig_req),
234 { STRUCT_FIELD(bth, pad_count),
238 { STRUCT_FIELD(bth, transport_header_version),
242 { STRUCT_FIELD(bth, pkey),
250 { STRUCT_FIELD(bth, destination_qpn),
254 { STRUCT_FIELD(bth, ack_req),
262 { STRUCT_FIELD(bth, psn),
268 static const struct ib_field deth_table[] = {
269 { STRUCT_FIELD(deth, qkey),
277 { STRUCT_FIELD(deth, source_qpn),
283 __sum16 ib_ud_ip4_csum(struct ib_ud_header *header)
289 iph.tos = header->ip4.tos;
290 iph.tot_len = header->ip4.tot_len;
291 iph.id = header->ip4.id;
292 iph.frag_off = header->ip4.frag_off;
293 iph.ttl = header->ip4.ttl;
294 iph.protocol = header->ip4.protocol;
296 iph.saddr = header->ip4.saddr;
297 iph.daddr = header->ip4.daddr;
299 return ip_fast_csum((u8 *)&iph, iph.ihl);
301 EXPORT_SYMBOL(ib_ud_ip4_csum);
304 * ib_ud_header_init - Initialize UD header structure
305 * @payload_bytes:Length of packet payload
306 * @lrh_present: specify if LRH is present
307 * @eth_present: specify if Eth header is present
308 * @vlan_present: packet is tagged vlan
309 * @grh_present: GRH flag (if non-zero, GRH will be included)
310 * @ip_version: if non-zero, IP header, V4 or V6, will be included
311 * @udp_present :if non-zero, UDP header will be included
312 * @immediate_present: specify if immediate data is present
313 * @header:Structure to initialize
315 int ib_ud_header_init(int payload_bytes,
322 int immediate_present,
323 struct ib_ud_header *header)
325 size_t udp_bytes = udp_present ? IB_UDP_BYTES : 0;
327 grh_present = grh_present && !ip_version;
328 memset(header, 0, sizeof *header);
331 * UDP header without IP header doesn't make sense
333 if (udp_present && ip_version != 4 && ip_version != 6)
339 header->lrh.link_version = 0;
340 header->lrh.link_next_header =
341 grh_present ? IB_LNH_IBA_GLOBAL : IB_LNH_IBA_LOCAL;
342 packet_length = (IB_LRH_BYTES +
345 (grh_present ? IB_GRH_BYTES : 0) +
348 3) / 4; /* round up */
349 header->lrh.packet_length = cpu_to_be16(packet_length);
353 header->eth.type = cpu_to_be16(ETH_P_8021Q);
355 if (ip_version == 6 || grh_present) {
356 header->grh.ip_version = 6;
357 header->grh.payload_length =
358 cpu_to_be16((udp_bytes +
363 3) & ~3); /* round up */
364 header->grh.next_header = udp_present ? IPPROTO_UDP : 0x1b;
367 if (ip_version == 4) {
368 header->ip4.ver = 4; /* version 4 */
369 header->ip4.hdr_len = 5; /* 5 words */
370 header->ip4.tot_len =
371 cpu_to_be16(IB_IP4_BYTES +
377 header->ip4.protocol = IPPROTO_UDP;
379 if (udp_present && ip_version)
381 cpu_to_be16(IB_UDP_BYTES +
387 if (immediate_present)
388 header->bth.opcode = IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE;
390 header->bth.opcode = IB_OPCODE_UD_SEND_ONLY;
391 header->bth.pad_count = (4 - payload_bytes) & 3;
392 header->bth.transport_header_version = 0;
394 header->lrh_present = lrh_present;
395 header->eth_present = eth_present;
396 header->vlan_present = vlan_present;
397 header->grh_present = grh_present || (ip_version == 6);
398 header->ipv4_present = ip_version == 4;
399 header->udp_present = udp_present;
400 header->immediate_present = immediate_present;
403 EXPORT_SYMBOL(ib_ud_header_init);
406 * ib_ud_header_pack - Pack UD header struct into wire format
407 * @header:UD header struct
408 * @buf:Buffer to pack into
410 * ib_ud_header_pack() packs the UD header structure @header into wire
411 * format in the buffer @buf.
413 int ib_ud_header_pack(struct ib_ud_header *header,
418 if (header->lrh_present) {
419 ib_pack(lrh_table, ARRAY_SIZE(lrh_table),
420 &header->lrh, buf + len);
423 if (header->eth_present) {
424 ib_pack(eth_table, ARRAY_SIZE(eth_table),
425 &header->eth, buf + len);
428 if (header->vlan_present) {
429 ib_pack(vlan_table, ARRAY_SIZE(vlan_table),
430 &header->vlan, buf + len);
431 len += IB_VLAN_BYTES;
433 if (header->grh_present) {
434 ib_pack(grh_table, ARRAY_SIZE(grh_table),
435 &header->grh, buf + len);
438 if (header->ipv4_present) {
439 ib_pack(ip4_table, ARRAY_SIZE(ip4_table),
440 &header->ip4, buf + len);
443 if (header->udp_present) {
444 ib_pack(udp_table, ARRAY_SIZE(udp_table),
445 &header->udp, buf + len);
449 ib_pack(bth_table, ARRAY_SIZE(bth_table),
450 &header->bth, buf + len);
453 ib_pack(deth_table, ARRAY_SIZE(deth_table),
454 &header->deth, buf + len);
455 len += IB_DETH_BYTES;
457 if (header->immediate_present) {
458 memcpy(buf + len, &header->immediate_data, sizeof header->immediate_data);
459 len += sizeof header->immediate_data;
464 EXPORT_SYMBOL(ib_ud_header_pack);
467 * ib_ud_header_unpack - Unpack UD header struct from wire format
468 * @header:UD header struct
469 * @buf:Buffer to pack into
471 * ib_ud_header_pack() unpacks the UD header structure @header from wire
472 * format in the buffer @buf.
474 int ib_ud_header_unpack(void *buf,
475 struct ib_ud_header *header)
477 ib_unpack(lrh_table, ARRAY_SIZE(lrh_table),
481 if (header->lrh.link_version != 0) {
482 pr_warn("Invalid LRH.link_version %d\n",
483 header->lrh.link_version);
487 switch (header->lrh.link_next_header) {
488 case IB_LNH_IBA_LOCAL:
489 header->grh_present = 0;
492 case IB_LNH_IBA_GLOBAL:
493 header->grh_present = 1;
494 ib_unpack(grh_table, ARRAY_SIZE(grh_table),
498 if (header->grh.ip_version != 6) {
499 pr_warn("Invalid GRH.ip_version %d\n",
500 header->grh.ip_version);
503 if (header->grh.next_header != 0x1b) {
504 pr_warn("Invalid GRH.next_header 0x%02x\n",
505 header->grh.next_header);
511 pr_warn("Invalid LRH.link_next_header %d\n",
512 header->lrh.link_next_header);
516 ib_unpack(bth_table, ARRAY_SIZE(bth_table),
520 switch (header->bth.opcode) {
521 case IB_OPCODE_UD_SEND_ONLY:
522 header->immediate_present = 0;
524 case IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE:
525 header->immediate_present = 1;
528 pr_warn("Invalid BTH.opcode 0x%02x\n", header->bth.opcode);
532 if (header->bth.transport_header_version != 0) {
533 pr_warn("Invalid BTH.transport_header_version %d\n",
534 header->bth.transport_header_version);
538 ib_unpack(deth_table, ARRAY_SIZE(deth_table),
540 buf += IB_DETH_BYTES;
542 if (header->immediate_present)
543 memcpy(&header->immediate_data, buf, sizeof header->immediate_data);
547 EXPORT_SYMBOL(ib_ud_header_unpack);