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>
39 #include <rdma/ib_pack.h>
41 #define STRUCT_FIELD(header, field) \
42 .struct_offset_bytes = offsetof(struct ib_unpacked_ ## header, field), \
43 .struct_size_bytes = sizeof ((struct ib_unpacked_ ## header *) 0)->field, \
44 .field_name = #header ":" #field
46 static const struct ib_field lrh_table[] = {
47 { STRUCT_FIELD(lrh, virtual_lane),
51 { STRUCT_FIELD(lrh, link_version),
55 { STRUCT_FIELD(lrh, service_level),
63 { STRUCT_FIELD(lrh, link_next_header),
67 { STRUCT_FIELD(lrh, destination_lid),
75 { STRUCT_FIELD(lrh, packet_length),
79 { STRUCT_FIELD(lrh, source_lid),
85 static const struct ib_field eth_table[] = {
86 { STRUCT_FIELD(eth, dmac_h),
90 { STRUCT_FIELD(eth, dmac_l),
94 { STRUCT_FIELD(eth, smac_h),
98 { STRUCT_FIELD(eth, smac_l),
102 { STRUCT_FIELD(eth, type),
108 static const struct ib_field vlan_table[] = {
109 { STRUCT_FIELD(vlan, tag),
113 { STRUCT_FIELD(vlan, type),
119 static const struct ib_field grh_table[] = {
120 { STRUCT_FIELD(grh, ip_version),
124 { STRUCT_FIELD(grh, traffic_class),
128 { STRUCT_FIELD(grh, flow_label),
132 { STRUCT_FIELD(grh, payload_length),
136 { STRUCT_FIELD(grh, next_header),
140 { STRUCT_FIELD(grh, hop_limit),
144 { STRUCT_FIELD(grh, source_gid),
148 { STRUCT_FIELD(grh, destination_gid),
154 static const struct ib_field bth_table[] = {
155 { STRUCT_FIELD(bth, opcode),
159 { STRUCT_FIELD(bth, solicited_event),
163 { STRUCT_FIELD(bth, mig_req),
167 { STRUCT_FIELD(bth, pad_count),
171 { STRUCT_FIELD(bth, transport_header_version),
175 { STRUCT_FIELD(bth, pkey),
183 { STRUCT_FIELD(bth, destination_qpn),
187 { STRUCT_FIELD(bth, ack_req),
195 { STRUCT_FIELD(bth, psn),
201 static const struct ib_field deth_table[] = {
202 { STRUCT_FIELD(deth, qkey),
210 { STRUCT_FIELD(deth, source_qpn),
217 * ib_ud_header_init - Initialize UD header structure
218 * @payload_bytes:Length of packet payload
219 * @lrh_present: specify if LRH is present
220 * @eth_present: specify if Eth header is present
221 * @vlan_present: packet is tagged vlan
222 * @grh_present:GRH flag (if non-zero, GRH will be included)
223 * @immediate_present: specify if immediate data is present
224 * @header:Structure to initialize
226 void ib_ud_header_init(int payload_bytes,
231 int immediate_present,
232 struct ib_ud_header *header)
234 memset(header, 0, sizeof *header);
239 header->lrh.link_version = 0;
240 header->lrh.link_next_header =
241 grh_present ? IB_LNH_IBA_GLOBAL : IB_LNH_IBA_LOCAL;
242 packet_length = (IB_LRH_BYTES +
245 (grh_present ? IB_GRH_BYTES : 0) +
248 3) / 4; /* round up */
249 header->lrh.packet_length = cpu_to_be16(packet_length);
253 header->eth.type = cpu_to_be16(ETH_P_8021Q);
256 header->grh.ip_version = 6;
257 header->grh.payload_length =
258 cpu_to_be16((IB_BTH_BYTES +
262 3) & ~3); /* round up */
263 header->grh.next_header = 0x1b;
266 if (immediate_present)
267 header->bth.opcode = IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE;
269 header->bth.opcode = IB_OPCODE_UD_SEND_ONLY;
270 header->bth.pad_count = (4 - payload_bytes) & 3;
271 header->bth.transport_header_version = 0;
273 header->lrh_present = lrh_present;
274 header->eth_present = eth_present;
275 header->vlan_present = vlan_present;
276 header->grh_present = grh_present;
277 header->immediate_present = immediate_present;
279 EXPORT_SYMBOL(ib_ud_header_init);
282 * ib_ud_header_pack - Pack UD header struct into wire format
283 * @header:UD header struct
284 * @buf:Buffer to pack into
286 * ib_ud_header_pack() packs the UD header structure @header into wire
287 * format in the buffer @buf.
289 int ib_ud_header_pack(struct ib_ud_header *header,
294 if (header->lrh_present) {
295 ib_pack(lrh_table, ARRAY_SIZE(lrh_table),
296 &header->lrh, buf + len);
299 if (header->eth_present) {
300 ib_pack(eth_table, ARRAY_SIZE(eth_table),
301 &header->eth, buf + len);
304 if (header->vlan_present) {
305 ib_pack(vlan_table, ARRAY_SIZE(vlan_table),
306 &header->vlan, buf + len);
307 len += IB_VLAN_BYTES;
309 if (header->grh_present) {
310 ib_pack(grh_table, ARRAY_SIZE(grh_table),
311 &header->grh, buf + len);
315 ib_pack(bth_table, ARRAY_SIZE(bth_table),
316 &header->bth, buf + len);
319 ib_pack(deth_table, ARRAY_SIZE(deth_table),
320 &header->deth, buf + len);
321 len += IB_DETH_BYTES;
323 if (header->immediate_present) {
324 memcpy(buf + len, &header->immediate_data, sizeof header->immediate_data);
325 len += sizeof header->immediate_data;
330 EXPORT_SYMBOL(ib_ud_header_pack);
333 * ib_ud_header_unpack - Unpack UD header struct from wire format
334 * @header:UD header struct
335 * @buf:Buffer to pack into
337 * ib_ud_header_pack() unpacks the UD header structure @header from wire
338 * format in the buffer @buf.
340 int ib_ud_header_unpack(void *buf,
341 struct ib_ud_header *header)
343 ib_unpack(lrh_table, ARRAY_SIZE(lrh_table),
347 if (header->lrh.link_version != 0) {
348 printk(KERN_WARNING "Invalid LRH.link_version %d\n",
349 header->lrh.link_version);
353 switch (header->lrh.link_next_header) {
354 case IB_LNH_IBA_LOCAL:
355 header->grh_present = 0;
358 case IB_LNH_IBA_GLOBAL:
359 header->grh_present = 1;
360 ib_unpack(grh_table, ARRAY_SIZE(grh_table),
364 if (header->grh.ip_version != 6) {
365 printk(KERN_WARNING "Invalid GRH.ip_version %d\n",
366 header->grh.ip_version);
369 if (header->grh.next_header != 0x1b) {
370 printk(KERN_WARNING "Invalid GRH.next_header 0x%02x\n",
371 header->grh.next_header);
377 printk(KERN_WARNING "Invalid LRH.link_next_header %d\n",
378 header->lrh.link_next_header);
382 ib_unpack(bth_table, ARRAY_SIZE(bth_table),
386 switch (header->bth.opcode) {
387 case IB_OPCODE_UD_SEND_ONLY:
388 header->immediate_present = 0;
390 case IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE:
391 header->immediate_present = 1;
394 printk(KERN_WARNING "Invalid BTH.opcode 0x%02x\n",
399 if (header->bth.transport_header_version != 0) {
400 printk(KERN_WARNING "Invalid BTH.transport_header_version %d\n",
401 header->bth.transport_header_version);
405 ib_unpack(deth_table, ARRAY_SIZE(deth_table),
407 buf += IB_DETH_BYTES;
409 if (header->immediate_present)
410 memcpy(&header->immediate_data, buf, sizeof header->immediate_data);
414 EXPORT_SYMBOL(ib_ud_header_unpack);