summaryrefslogtreecommitdiffstats
path: root/epan/dissectors/packet-opa-snc.c
blob: f5ae4b7a1e3108f14fc1e2981b1146ce15d9add6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
/* packet-opa-snc.c
 * Routines for Omni-Path SnC header dissection
 * Copyright (c) 2016, Intel Corporation.
 *
 * Wireshark - Network traffic analyzer
 * By Gerald Combs <gerald@wireshark.org>
 * Copyright 1998 Gerald Combs
 *
 * SPDX-License-Identifier: GPL-2.0-or-later
 */

#include "config.h"

#include <epan/packet.h>
#include <epan/expert.h>
#include <wiretap/erf_record.h>

void proto_reg_handoff_opa_snc(void);
void proto_register_opa_snc(void);

static const value_string vals_opa_snc_direction[] = {
    { 0, "Outbound" },
    { 1, "Inbound" },
    { 2, "Internal Debugging Tool" },
    { 0, NULL }
};
/* PBC */
static const true_false_string tfs_opa_snc_pbc_isBypass = {
    "Bypass (8B/10B/16B) Packet",
    "9B Packet"
};
static const value_string vals_opa_snc_pbc_insertHcrc[] = {
    { 0x0, "KDETH Hcrc calculated assuming GRH is not present" },
    { 0x1, "KDETH Hcrc calculated assuming GRH is present" },
    { 0x2, "KDETH Hcrc is not inserted" },
    { 0x3, "Reserved" },
    { 0, NULL }
};
/* RHF */
static const value_string vals_opa_snc_rhf_rcvtypeerr[] = {
    { 0x0, "No Error" },
    { 0x1, "OpCode Error" },
    { 0x2, "KDETH Min Length Error" },
    { 0x3, "KDETH Hcrc Error" },
    { 0x4, "KDETH Version Error" },
    { 0x5, "Context Error" },
    { 0x6, "KDETH TID Error" },
    { 0x7, "Reserved" },
    { 0, NULL }
};
static const value_string vals_opa_snc_rhf_rcvtype[] = {
    { 0, "Expected Receive" },
    { 1, "Eager Receive" },
    { 2, "IB" },
    { 3, "error" },
    { 4, "bypass" },
    { 0, NULL }
};

/* Wireshark ID */
static int proto_opa_snc;

/* Variables to hold expansion values between packets */
static int ett_snc;
static int ett_sncpbc;
static int ett_sncrhf;

/* SnC Fields */
static int hf_opa_snc_direction;
static int hf_opa_snc_portnumber;
static int hf_opa_snc_Reserved16;
static int hf_opa_snc_Reserved32;
static int hf_opa_snc_Reserved64;
static int hf_opa_snc_pbc_reserved_63_48;
static int hf_opa_snc_pbc_pbcstaticratecontrolcnt;
static int hf_opa_snc_pbc_pbcintr;
static int hf_opa_snc_pbc_pbcdcinfo;
static int hf_opa_snc_pbc_pbctestebp;
static int hf_opa_snc_pbc_pbcpacketbypass;
static int hf_opa_snc_pbc_pbcinserthcrc;
static int hf_opa_snc_pbc_pbccreditreturn;
static int hf_opa_snc_pbc_pbcinsertbypassicrc;
static int hf_opa_snc_pbc_pbctestbadicrc;
static int hf_opa_snc_pbc_pbcfecn;
static int hf_opa_snc_pbc_reserved_21_16;
static int hf_opa_snc_pbc_pbcvl;
static int hf_opa_snc_pbc_pbclengthdws;
static int * const _snc_pbc_1[] = {
    &hf_opa_snc_pbc_reserved_63_48,
    &hf_opa_snc_pbc_pbcstaticratecontrolcnt,
    NULL
};
static int * const _snc_pbc_2[] = {
    &hf_opa_snc_pbc_pbcintr,
    &hf_opa_snc_pbc_pbcdcinfo,
    &hf_opa_snc_pbc_pbctestebp,
    &hf_opa_snc_pbc_pbcpacketbypass,
    &hf_opa_snc_pbc_pbcinserthcrc,
    &hf_opa_snc_pbc_pbccreditreturn,
    &hf_opa_snc_pbc_pbcinsertbypassicrc,
    &hf_opa_snc_pbc_pbctestbadicrc,
    &hf_opa_snc_pbc_pbcfecn,
    &hf_opa_snc_pbc_reserved_21_16,
    &hf_opa_snc_pbc_pbcvl,
    &hf_opa_snc_pbc_pbclengthdws,
    NULL
};
static int hf_opa_snc_rhf_icrcerr;
static int hf_opa_snc_rhf_reserved_62;
static int hf_opa_snc_rhf_eccerr;
static int hf_opa_snc_rhf_lenerr;
static int hf_opa_snc_rhf_tiderr;
static int hf_opa_snc_rhf_rcvtypeerr;
static int hf_opa_snc_rhf_dcerr;
static int hf_opa_snc_rhf_dcuncerr;
static int hf_opa_snc_rhf_khdrlenerr;
static int hf_opa_snc_rhf_hdrqoffset;
static int hf_opa_snc_rhf_egroffset;
static int hf_opa_snc_rhf_rcvseq;
static int hf_opa_snc_rhf_dcinfo;
static int hf_opa_snc_rhf_egrindex;
static int hf_opa_snc_rhf_useegrbfr;
static int hf_opa_snc_rhf_rcvtype;
static int hf_opa_snc_rhf_pktlen;
static int * const _snc_rhf_1[] = {
    &hf_opa_snc_rhf_icrcerr,
    &hf_opa_snc_rhf_reserved_62,
    &hf_opa_snc_rhf_eccerr,
    &hf_opa_snc_rhf_lenerr,
    &hf_opa_snc_rhf_tiderr,
    &hf_opa_snc_rhf_rcvtypeerr,
    &hf_opa_snc_rhf_dcerr,
    &hf_opa_snc_rhf_dcuncerr,
    &hf_opa_snc_rhf_khdrlenerr,
    &hf_opa_snc_rhf_hdrqoffset,
    &hf_opa_snc_rhf_egroffset,
    NULL
};
static int * const _snc_rhf_2[] = {
    &hf_opa_snc_rhf_rcvseq,
    &hf_opa_snc_rhf_dcinfo,
    &hf_opa_snc_rhf_egrindex,
    &hf_opa_snc_rhf_useegrbfr,
    &hf_opa_snc_rhf_rcvtype,
    &hf_opa_snc_rhf_pktlen,
    NULL
};

static expert_field ei_opa_snc_nobypass;

static void cf_opa_snc_dw_to_b(char *buf, uint32_t value)
{
    snprintf(buf, ITEM_LABEL_LENGTH, "%u DWORDS, %u Bytes", value, value * 4);
}
static void cf_opa_snc_qw_to_b(char *buf, uint32_t value)
{
    snprintf(buf, ITEM_LABEL_LENGTH, "%u QWORDS, %u Bytes", value, value * 8);
}

/* Dissector Declarations */
static dissector_handle_t opa_snc_handle;
static dissector_handle_t opa_9b_handle;

static int dissect_opa_snc(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
{
    int offset = 0;    /* Current Offset */

    bool isBypass = true;  /* Tracks if we are parsing a bypass packet or Not */
    uint8_t Direction = tvb_get_uint8(tvb, offset + 1);
    uint64_t RHF_PBC;
    proto_item *SnC_item;
    proto_tree * SnC_tree,*PBC_tree,*RHF_tree;

    col_set_str(pinfo->cinfo, COL_PROTOCOL, "Omni-Path");
    col_clear(pinfo->cinfo, COL_INFO);

    tree = proto_tree_get_parent_tree(tree);

    SnC_item = proto_tree_add_item(tree, proto_opa_snc, tvb, offset, 16, ENC_NA);
    SnC_tree = proto_item_add_subtree(SnC_item, ett_snc);

    proto_tree_add_item(SnC_tree, hf_opa_snc_portnumber, tvb, offset, 1, ENC_LITTLE_ENDIAN);
    offset += 1;
    proto_tree_add_item(SnC_tree, hf_opa_snc_direction, tvb, offset, 1, ENC_LITTLE_ENDIAN);
    offset += 1;
    proto_tree_add_item(SnC_tree, hf_opa_snc_Reserved16, tvb, offset, 2, ENC_NA);
    offset += 2;
    proto_tree_add_item(SnC_tree, hf_opa_snc_Reserved32, tvb, offset, 4, ENC_NA);
    offset += 4;

    RHF_PBC = tvb_get_letoh64(tvb, offset);
    switch (Direction) {
    case 0:
        PBC_tree = proto_tree_add_subtree(SnC_tree, tvb, offset, 8, ett_sncpbc, NULL, "PBC - Per Buffer Control");
        proto_tree_add_bitmask_list(PBC_tree, tvb, offset + 4, 4, _snc_pbc_1, ENC_LITTLE_ENDIAN);
        proto_tree_add_bitmask_list(PBC_tree, tvb, offset, 4, _snc_pbc_2, ENC_LITTLE_ENDIAN);
        isBypass = (((RHF_PBC >> 28) & 1) == 1);
        break;
    case 1:
        RHF_tree = proto_tree_add_subtree(SnC_tree, tvb, offset, 8, ett_sncrhf, NULL, "RHF - Receive Header Flags");
        proto_tree_add_bitmask_list(RHF_tree, tvb, offset + 4, 4, _snc_rhf_1, ENC_LITTLE_ENDIAN);
        proto_tree_add_bitmask_list(RHF_tree, tvb, offset, 4, _snc_rhf_2, ENC_LITTLE_ENDIAN);
        isBypass = (((RHF_PBC >> 12) & 7) == 4);
        break;
    case 2:     /* For use with internal debugging tools */
        proto_tree_add_item(SnC_tree, hf_opa_snc_Reserved64, tvb, offset, 8, ENC_NA);
        isBypass = false;
        break;
    default:
        isBypass = false;
    }
    offset += 8;

    if (isBypass) {
        /* Bypass packets not implemented in this version */
        expert_add_info(pinfo, NULL, &ei_opa_snc_nobypass);
    } else {
        call_dissector(opa_9b_handle, tvb_new_subset_remaining(tvb, offset), pinfo, tree);
    }
    return tvb_captured_length(tvb);
}

void proto_register_opa_snc(void)
{
    expert_module_t *expert_opa_snc;

    static hf_register_info hf[] = {
        { &hf_opa_snc_direction, {
                "Direction", "opa.snc.direction",
                FT_UINT8, BASE_HEX, VALS(vals_opa_snc_direction), 0x0, NULL, HFILL }
        },
        { &hf_opa_snc_portnumber, {
                "Port Number", "opa.snc.portnumber",
                FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }
        },
        { &hf_opa_snc_Reserved32, {
                "Reserved (32 bits)", "opa.snc.reserved32",
                FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL }
        },
        { &hf_opa_snc_Reserved64, {
                "Reserved (64 bits)", "opa.snc.reserved64",
                FT_UINT64, BASE_HEX, NULL, 0x0, NULL, HFILL }
        },
        { &hf_opa_snc_Reserved16, {
                "Reserved (16 bits)", "opa.snc.reserved16",
                FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL }
        },
        { &hf_opa_snc_pbc_reserved_63_48, {
                "Reserved (16 bits)", "opa.snc.pbc.reserved_63_48",
                FT_UINT32, BASE_HEX, NULL, 0xFFFF0000, NULL, HFILL }
        },
        { &hf_opa_snc_pbc_pbcstaticratecontrolcnt, {
                "Static Rate Control Counter", "opa.snc.pbc.pbcstaticratecontrolcnt",
                FT_UINT32, BASE_HEX, NULL, 0x0000FFFF, NULL, HFILL }
        },
        { &hf_opa_snc_pbc_pbcintr, {
                "Interrupt", "opa.snc.pbc.pbcintr",
                FT_BOOLEAN, 32, TFS(&tfs_set_notset), 0x80000000, NULL, HFILL }
        },
        { &hf_opa_snc_pbc_pbcdcinfo, {
                "DC Info", "opa.snc.pbc.pbcdcinfo",
                FT_BOOLEAN, 32, TFS(&tfs_set_notset), 0x40000000, NULL, HFILL }
        },
        { &hf_opa_snc_pbc_pbctestebp, {
                "Test End Bad Packet", "opa.snc.pbc.pbctestebp",
                FT_BOOLEAN, 32, TFS(&tfs_set_notset), 0x20000000, NULL, HFILL }
        },
        { &hf_opa_snc_pbc_pbcpacketbypass, {
                "Packet Type", "opa.snc.pbc.pbcpacketbypass",
                FT_BOOLEAN, 32, TFS(&tfs_opa_snc_pbc_isBypass), 0x10000000, NULL, HFILL }
        },
        { &hf_opa_snc_pbc_pbcinserthcrc, {
                "Insert Hcrc", "opa.snc.pbc.pbcinserthcrc",
                FT_UINT32, BASE_HEX, VALS(vals_opa_snc_pbc_insertHcrc), 0x0C000000, NULL, HFILL }
        },
        { &hf_opa_snc_pbc_pbccreditreturn, {
                "Request Credit Return", "opa.snc.pbc.pbccreditreturn",
                FT_BOOLEAN, 32, TFS(&tfs_set_notset), 0x02000000, NULL, HFILL }
        },
        { &hf_opa_snc_pbc_pbcinsertbypassicrc, {
                "Insert ICRC for bypass packets", "opa.snc.pbc.pbcinsertbypassicrc",
                FT_BOOLEAN, 32, TFS(&tfs_set_notset), 0x01000000, NULL, HFILL }
        },
        { &hf_opa_snc_pbc_pbctestbadicrc, {
                "Insert a bad ICRC", "opa.snc.pbc.pbctestbadicrc",
                FT_BOOLEAN, 32, TFS(&tfs_set_notset), 0x00800000, NULL, HFILL }
        },
        { &hf_opa_snc_pbc_pbcfecn, {
                "Set FECN bit", "opa.snc.pbc.pbcfecn",
                FT_BOOLEAN, 32, TFS(&tfs_set_notset), 0x00400000, NULL, HFILL }
        },
        { &hf_opa_snc_pbc_reserved_21_16, {
                "Reserved (6 bits)", "opa.snc.pbc.reserved_21_16",
                FT_UINT32, BASE_HEX, NULL, 0x003F0000, NULL, HFILL }
        },
        { &hf_opa_snc_pbc_pbcvl, {
                "VL", "opa.snc.pbc.pbcvl",
                FT_UINT32, BASE_DEC, NULL, 0x0000F000, NULL, HFILL }
        },
        { &hf_opa_snc_pbc_pbclengthdws, {
                "pbclengthdws", "opa.snc.pbc.pbclengthdws",
                FT_UINT32, BASE_CUSTOM, CF_FUNC(cf_opa_snc_dw_to_b), 0x00000FFF, NULL, HFILL }
        },

        { &hf_opa_snc_rhf_icrcerr, {
                "ICRC error", "opa.snc.rhf.icrcerr",
                FT_BOOLEAN, 32, TFS(&tfs_error_ok), 0x80000000, NULL, HFILL }
        },
        { &hf_opa_snc_rhf_reserved_62, {
                "Reserved (1 bit)", "opa.snc.rhf.reserved_62",
                FT_UINT32, BASE_HEX, NULL, 0x40000000, NULL, HFILL }
        },
        { &hf_opa_snc_rhf_eccerr, {
                "Internal memory Uncorrectable error", "opa.snc.rhf.eccerr",
                FT_BOOLEAN, 32, TFS(&tfs_error_ok), 0x20000000, NULL, HFILL }
        },
        { &hf_opa_snc_rhf_lenerr, {
                "Length Error", "opa.snc.rhf.lenerr",
                FT_BOOLEAN, 32, TFS(&tfs_error_ok), 0x10000000, NULL, HFILL }
        },
        { &hf_opa_snc_rhf_tiderr, {
                "TID Error", "opa.snc.rhf.tiderr",
                FT_BOOLEAN, 32, TFS(&tfs_error_ok), 0x08000000, NULL, HFILL }
        },
        { &hf_opa_snc_rhf_rcvtypeerr, {
                "Receive Type Error", "opa.snc.rhf.rcvtypeerr",
                FT_UINT32, BASE_HEX, VALS(vals_opa_snc_rhf_rcvtypeerr), 0x07000000, NULL, HFILL }
        },
        { &hf_opa_snc_rhf_dcerr, {
                "End Bad Packet Error", "opa.snc.rhf.dcerr",
                FT_BOOLEAN, 32, TFS(&tfs_error_ok), 0x00800000, NULL, HFILL }
        },
        { &hf_opa_snc_rhf_dcuncerr, {
                "Uncorrectable or parity error", "opa.snc.rhf.dcuncerr",
                FT_BOOLEAN, 32, TFS(&tfs_error_ok), 0x00400000, NULL, HFILL }
        },
        { &hf_opa_snc_rhf_khdrlenerr, {
                "KDETH Length Error", "opa.snc.rhf.khdrlenerr",
                FT_BOOLEAN, 32, TFS(&tfs_error_ok), 0x00200000, NULL, HFILL }
        },
        { &hf_opa_snc_rhf_hdrqoffset, {
                "Receive Header Offset", "opa.snc.rhf.hdrqoffset",
                FT_UINT32, BASE_CUSTOM, CF_FUNC(cf_opa_snc_dw_to_b), 0x001FF000, NULL, HFILL }
        },
        { &hf_opa_snc_rhf_egroffset, {
                "Eager Buffer Offset", "opa.snc.rhf.egroffset",
                FT_UINT32, BASE_CUSTOM, CF_FUNC(cf_opa_snc_qw_to_b), 0x00000FFF, NULL, HFILL }
        },
        { &hf_opa_snc_rhf_rcvseq, {
                "Receive Sequence", "opa.snc.rhf.rcvseq",
                FT_UINT32, BASE_DEC, NULL, 0xF0000000, NULL, HFILL }
        },
        { &hf_opa_snc_rhf_dcinfo, {
                "DC Info", "opa.snc.rhf.dcinfo",
                FT_BOOLEAN, 32, TFS(&tfs_set_notset), 0x08000000, NULL, HFILL }
        },
        { &hf_opa_snc_rhf_egrindex, {
                "Eager Buffer Index", "opa.snc.rhf.egrindex",
                FT_UINT32, BASE_HEX, NULL, 0x07FF0000, NULL, HFILL }
        },
        { &hf_opa_snc_rhf_useegrbfr, {
                "Use Eager Buffer", "opa.snc.rhf.useegrbfr",
                FT_BOOLEAN, 32, TFS(&tfs_set_notset), 0x00008000, NULL, HFILL }
        },
        { &hf_opa_snc_rhf_rcvtype, {
                "Packet Receive Type", "opa.snc.rhf.rcvtype",
                FT_UINT32, BASE_DEC_HEX, VALS(vals_opa_snc_rhf_rcvtype), 0x00007000, NULL, HFILL }
        },
        { &hf_opa_snc_rhf_pktlen, {
                "Packet Length", "opa.snc.rhf.pktlen",
                FT_UINT32, BASE_CUSTOM, CF_FUNC(cf_opa_snc_dw_to_b), 0x00000FFF, NULL, HFILL }
        }
    };

    static int *ett[] = {
        &ett_snc,
        &ett_sncpbc,
        &ett_sncrhf,
    };

    static ei_register_info ei[] = {
        { &ei_opa_snc_nobypass, {
                "opa.snc.nobypass", PI_PROTOCOL, PI_WARN,
                "Bypass packets not implemented in this version", EXPFILL }
        }
    };

    proto_opa_snc = proto_register_protocol("Intel Omni-Path SnC - Omni-Path Snoop and Capture MetaData Header", "OPA SnC", "opa.snc");
    opa_snc_handle = register_dissector("opa.snc", dissect_opa_snc, proto_opa_snc);

    proto_register_field_array(proto_opa_snc, hf, array_length(hf));
    proto_register_subtree_array(ett, array_length(ett));

    expert_opa_snc = expert_register_protocol(proto_opa_snc);
    expert_register_field_array(expert_opa_snc, ei, array_length(ei));
}

void proto_reg_handoff_opa_snc(void)
{
    opa_9b_handle = find_dissector("opa");

    /* announce an anonymous Omni-Path SnC dissector */
    dissector_add_uint("erf.types.type", ERF_TYPE_OPA_SNC, opa_snc_handle);

}

/*
 * Editor modelines  -  https://www.wireshark.org/tools/modelines.html
 *
 * Local variables:
 * c-basic-offset: 4
 * tab-width: 8
 * indent-tabs-mode: nil
 * End:
 *
 * vi: set shiftwidth=4 tabstop=8 expandtab:
 * :indentSize=4:tabSize=8:noTabs=true:
 */