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1da177e4 LT |
1 | /* |
2 | * Copyright (c) 2004 Topspin Corporation. All rights reserved. | |
2a1d9b7f | 3 | * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. |
1da177e4 LT |
4 | * |
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: | |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or | |
12 | * without modification, are permitted provided that the following | |
13 | * conditions are met: | |
14 | * | |
15 | * - Redistributions of source code must retain the above | |
16 | * copyright notice, this list of conditions and the following | |
17 | * disclaimer. | |
18 | * | |
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. | |
23 | * | |
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 | |
31 | * SOFTWARE. | |
1da177e4 LT |
32 | */ |
33 | ||
34 | #include <linux/errno.h> | |
8c65b4a6 | 35 | #include <linux/string.h> |
af7bd463 | 36 | #include <linux/if_ether.h> |
1da177e4 | 37 | |
a4d61e84 | 38 | #include <rdma/ib_pack.h> |
1da177e4 LT |
39 | |
40 | #define STRUCT_FIELD(header, field) \ | |
41 | .struct_offset_bytes = offsetof(struct ib_unpacked_ ## header, field), \ | |
42 | .struct_size_bytes = sizeof ((struct ib_unpacked_ ## header *) 0)->field, \ | |
43 | .field_name = #header ":" #field | |
44 | ||
45 | static const struct ib_field lrh_table[] = { | |
46 | { STRUCT_FIELD(lrh, virtual_lane), | |
47 | .offset_words = 0, | |
48 | .offset_bits = 0, | |
49 | .size_bits = 4 }, | |
50 | { STRUCT_FIELD(lrh, link_version), | |
51 | .offset_words = 0, | |
52 | .offset_bits = 4, | |
53 | .size_bits = 4 }, | |
54 | { STRUCT_FIELD(lrh, service_level), | |
55 | .offset_words = 0, | |
56 | .offset_bits = 8, | |
57 | .size_bits = 4 }, | |
58 | { RESERVED, | |
59 | .offset_words = 0, | |
60 | .offset_bits = 12, | |
61 | .size_bits = 2 }, | |
62 | { STRUCT_FIELD(lrh, link_next_header), | |
63 | .offset_words = 0, | |
64 | .offset_bits = 14, | |
65 | .size_bits = 2 }, | |
66 | { STRUCT_FIELD(lrh, destination_lid), | |
67 | .offset_words = 0, | |
68 | .offset_bits = 16, | |
69 | .size_bits = 16 }, | |
70 | { RESERVED, | |
71 | .offset_words = 1, | |
72 | .offset_bits = 0, | |
73 | .size_bits = 5 }, | |
74 | { STRUCT_FIELD(lrh, packet_length), | |
75 | .offset_words = 1, | |
76 | .offset_bits = 5, | |
77 | .size_bits = 11 }, | |
78 | { STRUCT_FIELD(lrh, source_lid), | |
79 | .offset_words = 1, | |
80 | .offset_bits = 16, | |
81 | .size_bits = 16 } | |
82 | }; | |
83 | ||
ff7f5aab EC |
84 | static const struct ib_field eth_table[] = { |
85 | { STRUCT_FIELD(eth, dmac_h), | |
86 | .offset_words = 0, | |
87 | .offset_bits = 0, | |
88 | .size_bits = 32 }, | |
89 | { STRUCT_FIELD(eth, dmac_l), | |
90 | .offset_words = 1, | |
91 | .offset_bits = 0, | |
92 | .size_bits = 16 }, | |
93 | { STRUCT_FIELD(eth, smac_h), | |
94 | .offset_words = 1, | |
95 | .offset_bits = 16, | |
96 | .size_bits = 16 }, | |
97 | { STRUCT_FIELD(eth, smac_l), | |
98 | .offset_words = 2, | |
99 | .offset_bits = 0, | |
100 | .size_bits = 32 }, | |
101 | { STRUCT_FIELD(eth, type), | |
102 | .offset_words = 3, | |
103 | .offset_bits = 0, | |
104 | .size_bits = 16 } | |
105 | }; | |
106 | ||
af7bd463 EC |
107 | static const struct ib_field vlan_table[] = { |
108 | { STRUCT_FIELD(vlan, tag), | |
109 | .offset_words = 0, | |
110 | .offset_bits = 0, | |
111 | .size_bits = 16 }, | |
112 | { STRUCT_FIELD(vlan, type), | |
113 | .offset_words = 0, | |
114 | .offset_bits = 16, | |
115 | .size_bits = 16 } | |
116 | }; | |
117 | ||
1da177e4 LT |
118 | static const struct ib_field grh_table[] = { |
119 | { STRUCT_FIELD(grh, ip_version), | |
120 | .offset_words = 0, | |
121 | .offset_bits = 0, | |
122 | .size_bits = 4 }, | |
123 | { STRUCT_FIELD(grh, traffic_class), | |
124 | .offset_words = 0, | |
125 | .offset_bits = 4, | |
126 | .size_bits = 8 }, | |
127 | { STRUCT_FIELD(grh, flow_label), | |
128 | .offset_words = 0, | |
129 | .offset_bits = 12, | |
130 | .size_bits = 20 }, | |
131 | { STRUCT_FIELD(grh, payload_length), | |
132 | .offset_words = 1, | |
133 | .offset_bits = 0, | |
134 | .size_bits = 16 }, | |
135 | { STRUCT_FIELD(grh, next_header), | |
136 | .offset_words = 1, | |
137 | .offset_bits = 16, | |
138 | .size_bits = 8 }, | |
139 | { STRUCT_FIELD(grh, hop_limit), | |
140 | .offset_words = 1, | |
141 | .offset_bits = 24, | |
142 | .size_bits = 8 }, | |
143 | { STRUCT_FIELD(grh, source_gid), | |
144 | .offset_words = 2, | |
145 | .offset_bits = 0, | |
146 | .size_bits = 128 }, | |
147 | { STRUCT_FIELD(grh, destination_gid), | |
148 | .offset_words = 6, | |
149 | .offset_bits = 0, | |
150 | .size_bits = 128 } | |
151 | }; | |
152 | ||
153 | static const struct ib_field bth_table[] = { | |
154 | { STRUCT_FIELD(bth, opcode), | |
155 | .offset_words = 0, | |
156 | .offset_bits = 0, | |
157 | .size_bits = 8 }, | |
158 | { STRUCT_FIELD(bth, solicited_event), | |
159 | .offset_words = 0, | |
160 | .offset_bits = 8, | |
161 | .size_bits = 1 }, | |
162 | { STRUCT_FIELD(bth, mig_req), | |
163 | .offset_words = 0, | |
164 | .offset_bits = 9, | |
165 | .size_bits = 1 }, | |
166 | { STRUCT_FIELD(bth, pad_count), | |
167 | .offset_words = 0, | |
168 | .offset_bits = 10, | |
169 | .size_bits = 2 }, | |
170 | { STRUCT_FIELD(bth, transport_header_version), | |
171 | .offset_words = 0, | |
172 | .offset_bits = 12, | |
173 | .size_bits = 4 }, | |
174 | { STRUCT_FIELD(bth, pkey), | |
175 | .offset_words = 0, | |
176 | .offset_bits = 16, | |
177 | .size_bits = 16 }, | |
178 | { RESERVED, | |
179 | .offset_words = 1, | |
180 | .offset_bits = 0, | |
181 | .size_bits = 8 }, | |
182 | { STRUCT_FIELD(bth, destination_qpn), | |
183 | .offset_words = 1, | |
184 | .offset_bits = 8, | |
185 | .size_bits = 24 }, | |
186 | { STRUCT_FIELD(bth, ack_req), | |
187 | .offset_words = 2, | |
188 | .offset_bits = 0, | |
189 | .size_bits = 1 }, | |
190 | { RESERVED, | |
191 | .offset_words = 2, | |
192 | .offset_bits = 1, | |
193 | .size_bits = 7 }, | |
194 | { STRUCT_FIELD(bth, psn), | |
195 | .offset_words = 2, | |
196 | .offset_bits = 8, | |
197 | .size_bits = 24 } | |
198 | }; | |
199 | ||
200 | static const struct ib_field deth_table[] = { | |
201 | { STRUCT_FIELD(deth, qkey), | |
202 | .offset_words = 0, | |
203 | .offset_bits = 0, | |
204 | .size_bits = 32 }, | |
205 | { RESERVED, | |
206 | .offset_words = 1, | |
207 | .offset_bits = 0, | |
208 | .size_bits = 8 }, | |
209 | { STRUCT_FIELD(deth, source_qpn), | |
210 | .offset_words = 1, | |
211 | .offset_bits = 8, | |
212 | .size_bits = 24 } | |
213 | }; | |
214 | ||
215 | /** | |
216 | * ib_ud_header_init - Initialize UD header structure | |
217 | * @payload_bytes:Length of packet payload | |
ff7f5aab EC |
218 | * @lrh_present: specify if LRH is present |
219 | * @eth_present: specify if Eth header is present | |
af7bd463 | 220 | * @vlan_present: packet is tagged vlan |
1da177e4 | 221 | * @grh_present:GRH flag (if non-zero, GRH will be included) |
ff7f5aab | 222 | * @immediate_present: specify if immediate data is present |
1da177e4 | 223 | * @header:Structure to initialize |
1da177e4 LT |
224 | */ |
225 | void ib_ud_header_init(int payload_bytes, | |
ff7f5aab EC |
226 | int lrh_present, |
227 | int eth_present, | |
af7bd463 | 228 | int vlan_present, |
1da177e4 | 229 | int grh_present, |
920d706c | 230 | int immediate_present, |
1da177e4 LT |
231 | struct ib_ud_header *header) |
232 | { | |
1da177e4 LT |
233 | memset(header, 0, sizeof *header); |
234 | ||
ff7f5aab EC |
235 | if (lrh_present) { |
236 | u16 packet_length; | |
237 | ||
238 | header->lrh.link_version = 0; | |
239 | header->lrh.link_next_header = | |
240 | grh_present ? IB_LNH_IBA_GLOBAL : IB_LNH_IBA_LOCAL; | |
241 | packet_length = (IB_LRH_BYTES + | |
242 | IB_BTH_BYTES + | |
243 | IB_DETH_BYTES + | |
244 | (grh_present ? IB_GRH_BYTES : 0) + | |
245 | payload_bytes + | |
246 | 4 + /* ICRC */ | |
247 | 3) / 4; /* round up */ | |
248 | header->lrh.packet_length = cpu_to_be16(packet_length); | |
249 | } | |
1da177e4 | 250 | |
af7bd463 EC |
251 | if (vlan_present) |
252 | header->eth.type = cpu_to_be16(ETH_P_8021Q); | |
253 | ||
1da177e4 | 254 | if (grh_present) { |
1da177e4 LT |
255 | header->grh.ip_version = 6; |
256 | header->grh.payload_length = | |
257 | cpu_to_be16((IB_BTH_BYTES + | |
258 | IB_DETH_BYTES + | |
259 | payload_bytes + | |
260 | 4 + /* ICRC */ | |
261 | 3) & ~3); /* round up */ | |
262 | header->grh.next_header = 0x1b; | |
263 | } | |
264 | ||
920d706c | 265 | if (immediate_present) |
1da177e4 LT |
266 | header->bth.opcode = IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE; |
267 | else | |
268 | header->bth.opcode = IB_OPCODE_UD_SEND_ONLY; | |
269 | header->bth.pad_count = (4 - payload_bytes) & 3; | |
270 | header->bth.transport_header_version = 0; | |
ff7f5aab EC |
271 | |
272 | header->lrh_present = lrh_present; | |
273 | header->eth_present = eth_present; | |
af7bd463 | 274 | header->vlan_present = vlan_present; |
ff7f5aab EC |
275 | header->grh_present = grh_present; |
276 | header->immediate_present = immediate_present; | |
1da177e4 LT |
277 | } |
278 | EXPORT_SYMBOL(ib_ud_header_init); | |
279 | ||
280 | /** | |
281 | * ib_ud_header_pack - Pack UD header struct into wire format | |
282 | * @header:UD header struct | |
283 | * @buf:Buffer to pack into | |
284 | * | |
285 | * ib_ud_header_pack() packs the UD header structure @header into wire | |
286 | * format in the buffer @buf. | |
287 | */ | |
288 | int ib_ud_header_pack(struct ib_ud_header *header, | |
289 | void *buf) | |
290 | { | |
291 | int len = 0; | |
292 | ||
ff7f5aab EC |
293 | if (header->lrh_present) { |
294 | ib_pack(lrh_table, ARRAY_SIZE(lrh_table), | |
295 | &header->lrh, buf + len); | |
296 | len += IB_LRH_BYTES; | |
297 | } | |
298 | if (header->eth_present) { | |
299 | ib_pack(eth_table, ARRAY_SIZE(eth_table), | |
300 | &header->eth, buf + len); | |
301 | len += IB_ETH_BYTES; | |
302 | } | |
af7bd463 EC |
303 | if (header->vlan_present) { |
304 | ib_pack(vlan_table, ARRAY_SIZE(vlan_table), | |
305 | &header->vlan, buf + len); | |
306 | len += IB_VLAN_BYTES; | |
307 | } | |
1da177e4 LT |
308 | if (header->grh_present) { |
309 | ib_pack(grh_table, ARRAY_SIZE(grh_table), | |
310 | &header->grh, buf + len); | |
311 | len += IB_GRH_BYTES; | |
312 | } | |
313 | ||
314 | ib_pack(bth_table, ARRAY_SIZE(bth_table), | |
315 | &header->bth, buf + len); | |
316 | len += IB_BTH_BYTES; | |
317 | ||
318 | ib_pack(deth_table, ARRAY_SIZE(deth_table), | |
319 | &header->deth, buf + len); | |
320 | len += IB_DETH_BYTES; | |
321 | ||
322 | if (header->immediate_present) { | |
323 | memcpy(buf + len, &header->immediate_data, sizeof header->immediate_data); | |
324 | len += sizeof header->immediate_data; | |
325 | } | |
326 | ||
327 | return len; | |
328 | } | |
329 | EXPORT_SYMBOL(ib_ud_header_pack); | |
330 | ||
331 | /** | |
332 | * ib_ud_header_unpack - Unpack UD header struct from wire format | |
333 | * @header:UD header struct | |
334 | * @buf:Buffer to pack into | |
335 | * | |
336 | * ib_ud_header_pack() unpacks the UD header structure @header from wire | |
337 | * format in the buffer @buf. | |
338 | */ | |
339 | int ib_ud_header_unpack(void *buf, | |
340 | struct ib_ud_header *header) | |
341 | { | |
342 | ib_unpack(lrh_table, ARRAY_SIZE(lrh_table), | |
343 | buf, &header->lrh); | |
344 | buf += IB_LRH_BYTES; | |
345 | ||
346 | if (header->lrh.link_version != 0) { | |
347 | printk(KERN_WARNING "Invalid LRH.link_version %d\n", | |
348 | header->lrh.link_version); | |
349 | return -EINVAL; | |
350 | } | |
351 | ||
352 | switch (header->lrh.link_next_header) { | |
353 | case IB_LNH_IBA_LOCAL: | |
354 | header->grh_present = 0; | |
355 | break; | |
356 | ||
357 | case IB_LNH_IBA_GLOBAL: | |
358 | header->grh_present = 1; | |
359 | ib_unpack(grh_table, ARRAY_SIZE(grh_table), | |
360 | buf, &header->grh); | |
361 | buf += IB_GRH_BYTES; | |
362 | ||
363 | if (header->grh.ip_version != 6) { | |
364 | printk(KERN_WARNING "Invalid GRH.ip_version %d\n", | |
365 | header->grh.ip_version); | |
366 | return -EINVAL; | |
367 | } | |
368 | if (header->grh.next_header != 0x1b) { | |
369 | printk(KERN_WARNING "Invalid GRH.next_header 0x%02x\n", | |
370 | header->grh.next_header); | |
371 | return -EINVAL; | |
372 | } | |
373 | break; | |
374 | ||
375 | default: | |
376 | printk(KERN_WARNING "Invalid LRH.link_next_header %d\n", | |
377 | header->lrh.link_next_header); | |
378 | return -EINVAL; | |
379 | } | |
380 | ||
381 | ib_unpack(bth_table, ARRAY_SIZE(bth_table), | |
382 | buf, &header->bth); | |
383 | buf += IB_BTH_BYTES; | |
384 | ||
385 | switch (header->bth.opcode) { | |
386 | case IB_OPCODE_UD_SEND_ONLY: | |
387 | header->immediate_present = 0; | |
388 | break; | |
389 | case IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE: | |
390 | header->immediate_present = 1; | |
391 | break; | |
392 | default: | |
393 | printk(KERN_WARNING "Invalid BTH.opcode 0x%02x\n", | |
394 | header->bth.opcode); | |
395 | return -EINVAL; | |
396 | } | |
397 | ||
398 | if (header->bth.transport_header_version != 0) { | |
399 | printk(KERN_WARNING "Invalid BTH.transport_header_version %d\n", | |
400 | header->bth.transport_header_version); | |
401 | return -EINVAL; | |
402 | } | |
403 | ||
404 | ib_unpack(deth_table, ARRAY_SIZE(deth_table), | |
405 | buf, &header->deth); | |
406 | buf += IB_DETH_BYTES; | |
407 | ||
408 | if (header->immediate_present) | |
409 | memcpy(&header->immediate_data, buf, sizeof header->immediate_data); | |
410 | ||
411 | return 0; | |
412 | } | |
413 | EXPORT_SYMBOL(ib_ud_header_unpack); |