Merge commit 'upstream-x86-entry' into WIP.x86/mm
[sfrench/cifs-2.6.git] / tools / firewire / nosy-dump.c
1 /*
2  * nosy-dump - Interface to snoop mode driver for TI PCILynx 1394 controllers
3  * Copyright (C) 2002-2006 Kristian Høgsberg
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License as published by
7  * the Free Software Foundation; either version 2 of the License, or
8  * (at your option) any later version.
9  *
10  * This program is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13  * GNU General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public License
16  * along with this program; if not, write to the Free Software Foundation,
17  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18  */
19
20 #include <byteswap.h>
21 #include <endian.h>
22 #include <fcntl.h>
23 #include <linux/firewire-constants.h>
24 #include <poll.h>
25 #include <popt.h>
26 #include <signal.h>
27 #include <stdio.h>
28 #include <stdlib.h>
29 #include <string.h>
30 #include <sys/ioctl.h>
31 #include <sys/time.h>
32 #include <termios.h>
33 #include <unistd.h>
34
35 #include "list.h"
36 #include "nosy-dump.h"
37 #include "nosy-user.h"
38
39 enum {
40         PACKET_FIELD_DETAIL             = 0x01,
41         PACKET_FIELD_DATA_LENGTH        = 0x02,
42         /* Marks the fields we print in transaction view. */
43         PACKET_FIELD_TRANSACTION        = 0x04,
44 };
45
46 static void print_packet(uint32_t *data, size_t length);
47 static void decode_link_packet(struct link_packet *packet, size_t length,
48                                int include_flags, int exclude_flags);
49 static int run = 1;
50 sig_t sys_sigint_handler;
51
52 static char *option_nosy_device = "/dev/nosy";
53 static char *option_view = "packet";
54 static char *option_output;
55 static char *option_input;
56 static int option_hex;
57 static int option_iso;
58 static int option_cycle_start;
59 static int option_version;
60 static int option_verbose;
61
62 enum {
63         VIEW_TRANSACTION,
64         VIEW_PACKET,
65         VIEW_STATS,
66 };
67
68 static const struct poptOption options[] = {
69         {
70                 .longName       = "device",
71                 .shortName      = 'd',
72                 .argInfo        = POPT_ARG_STRING,
73                 .arg            = &option_nosy_device,
74                 .descrip        = "Path to nosy device.",
75                 .argDescrip     = "DEVICE"
76         },
77         {
78                 .longName       = "view",
79                 .argInfo        = POPT_ARG_STRING,
80                 .arg            = &option_view,
81                 .descrip        = "Specify view of bus traffic: packet, transaction or stats.",
82                 .argDescrip     = "VIEW"
83         },
84         {
85                 .longName       = "hex",
86                 .shortName      = 'x',
87                 .argInfo        = POPT_ARG_NONE,
88                 .arg            = &option_hex,
89                 .descrip        = "Print each packet in hex.",
90         },
91         {
92                 .longName       = "iso",
93                 .argInfo        = POPT_ARG_NONE,
94                 .arg            = &option_iso,
95                 .descrip        = "Print iso packets.",
96         },
97         {
98                 .longName       = "cycle-start",
99                 .argInfo        = POPT_ARG_NONE,
100                 .arg            = &option_cycle_start,
101                 .descrip        = "Print cycle start packets.",
102         },
103         {
104                 .longName       = "verbose",
105                 .shortName      = 'v',
106                 .argInfo        = POPT_ARG_NONE,
107                 .arg            = &option_verbose,
108                 .descrip        = "Verbose packet view.",
109         },
110         {
111                 .longName       = "output",
112                 .shortName      = 'o',
113                 .argInfo        = POPT_ARG_STRING,
114                 .arg            = &option_output,
115                 .descrip        = "Log to output file.",
116                 .argDescrip     = "FILENAME"
117         },
118         {
119                 .longName       = "input",
120                 .shortName      = 'i',
121                 .argInfo        = POPT_ARG_STRING,
122                 .arg            = &option_input,
123                 .descrip        = "Decode log from file.",
124                 .argDescrip     = "FILENAME"
125         },
126         {
127                 .longName       = "version",
128                 .argInfo        = POPT_ARG_NONE,
129                 .arg            = &option_version,
130                 .descrip        = "Specify print version info.",
131         },
132         POPT_AUTOHELP
133         POPT_TABLEEND
134 };
135
136 /* Allow all ^C except the first to interrupt the program in the usual way. */
137 static void
138 sigint_handler(int signal_num)
139 {
140         if (run == 1) {
141                 run = 0;
142                 signal(SIGINT, SIG_DFL);
143         }
144 }
145
146 static struct subaction *
147 subaction_create(uint32_t *data, size_t length)
148 {
149         struct subaction *sa;
150
151         /* we put the ack in the subaction struct for easy access. */
152         sa = malloc(sizeof *sa - sizeof sa->packet + length);
153         if (!sa)
154                 exit(EXIT_FAILURE);
155         sa->ack = data[length / 4 - 1];
156         sa->length = length;
157         memcpy(&sa->packet, data, length);
158
159         return sa;
160 }
161
162 static void
163 subaction_destroy(struct subaction *sa)
164 {
165         free(sa);
166 }
167
168 static struct list pending_transaction_list = {
169         &pending_transaction_list, &pending_transaction_list
170 };
171
172 static struct link_transaction *
173 link_transaction_lookup(int request_node, int response_node, int tlabel)
174 {
175         struct link_transaction *t;
176
177         list_for_each_entry(t, &pending_transaction_list, link) {
178                 if (t->request_node == request_node &&
179                     t->response_node == response_node &&
180                     t->tlabel == tlabel)
181                         return t;
182         }
183
184         t = malloc(sizeof *t);
185         if (!t)
186                 exit(EXIT_FAILURE);
187         t->request_node = request_node;
188         t->response_node = response_node;
189         t->tlabel = tlabel;
190         list_init(&t->request_list);
191         list_init(&t->response_list);
192
193         list_append(&pending_transaction_list, &t->link);
194
195         return t;
196 }
197
198 static void
199 link_transaction_destroy(struct link_transaction *t)
200 {
201         struct subaction *sa;
202
203         while (!list_empty(&t->request_list)) {
204                 sa = list_head(&t->request_list, struct subaction, link);
205                 list_remove(&sa->link);
206                 subaction_destroy(sa);
207         }
208         while (!list_empty(&t->response_list)) {
209                 sa = list_head(&t->response_list, struct subaction, link);
210                 list_remove(&sa->link);
211                 subaction_destroy(sa);
212         }
213         free(t);
214 }
215
216 struct protocol_decoder {
217         const char *name;
218         int (*decode)(struct link_transaction *t);
219 };
220
221 static const struct protocol_decoder protocol_decoders[] = {
222         { "FCP", decode_fcp }
223 };
224
225 static void
226 handle_transaction(struct link_transaction *t)
227 {
228         struct subaction *sa;
229         int i;
230
231         if (!t->request) {
232                 printf("BUG in handle_transaction\n");
233                 return;
234         }
235
236         for (i = 0; i < array_length(protocol_decoders); i++)
237                 if (protocol_decoders[i].decode(t))
238                         break;
239
240         /* HACK: decode only fcp right now. */
241         return;
242
243         decode_link_packet(&t->request->packet, t->request->length,
244                            PACKET_FIELD_TRANSACTION, 0);
245         if (t->response)
246                 decode_link_packet(&t->response->packet, t->request->length,
247                                    PACKET_FIELD_TRANSACTION, 0);
248         else
249                 printf("[no response]");
250
251         if (option_verbose) {
252                 list_for_each_entry(sa, &t->request_list, link)
253                         print_packet((uint32_t *) &sa->packet, sa->length);
254                 list_for_each_entry(sa, &t->response_list, link)
255                         print_packet((uint32_t *) &sa->packet, sa->length);
256         }
257         printf("\r\n");
258
259         link_transaction_destroy(t);
260 }
261
262 static void
263 clear_pending_transaction_list(void)
264 {
265         struct link_transaction *t;
266
267         while (!list_empty(&pending_transaction_list)) {
268                 t = list_head(&pending_transaction_list,
269                               struct link_transaction, link);
270                 list_remove(&t->link);
271                 link_transaction_destroy(t);
272                 /* print unfinished transactions */
273         }
274 }
275
276 static const char * const tcode_names[] = {
277         [0x0] = "write_quadlet_request",        [0x6] = "read_quadlet_response",
278         [0x1] = "write_block_request",          [0x7] = "read_block_response",
279         [0x2] = "write_response",               [0x8] = "cycle_start",
280         [0x3] = "reserved",                     [0x9] = "lock_request",
281         [0x4] = "read_quadlet_request",         [0xa] = "iso_data",
282         [0x5] = "read_block_request",           [0xb] = "lock_response",
283 };
284
285 static const char * const ack_names[] = {
286         [0x0] = "no ack",                       [0x8] = "reserved (0x08)",
287         [0x1] = "ack_complete",                 [0x9] = "reserved (0x09)",
288         [0x2] = "ack_pending",                  [0xa] = "reserved (0x0a)",
289         [0x3] = "reserved (0x03)",              [0xb] = "reserved (0x0b)",
290         [0x4] = "ack_busy_x",                   [0xc] = "reserved (0x0c)",
291         [0x5] = "ack_busy_a",                   [0xd] = "ack_data_error",
292         [0x6] = "ack_busy_b",                   [0xe] = "ack_type_error",
293         [0x7] = "reserved (0x07)",              [0xf] = "reserved (0x0f)",
294 };
295
296 static const char * const rcode_names[] = {
297         [0x0] = "complete",                     [0x4] = "conflict_error",
298         [0x1] = "reserved (0x01)",              [0x5] = "data_error",
299         [0x2] = "reserved (0x02)",              [0x6] = "type_error",
300         [0x3] = "reserved (0x03)",              [0x7] = "address_error",
301 };
302
303 static const char * const retry_names[] = {
304         [0x0] = "retry_1",
305         [0x1] = "retry_x",
306         [0x2] = "retry_a",
307         [0x3] = "retry_b",
308 };
309
310 enum {
311         PACKET_RESERVED,
312         PACKET_REQUEST,
313         PACKET_RESPONSE,
314         PACKET_OTHER,
315 };
316
317 struct packet_info {
318         const char *name;
319         int type;
320         int response_tcode;
321         const struct packet_field *fields;
322         int field_count;
323 };
324
325 struct packet_field {
326         const char *name; /* Short name for field. */
327         int offset;     /* Location of field, specified in bits; */
328                         /* negative means from end of packet.    */
329         int width;      /* Width of field, 0 means use data_length. */
330         int flags;      /* Show options. */
331         const char * const *value_names;
332 };
333
334 #define COMMON_REQUEST_FIELDS                                           \
335         { "dest", 0, 16, PACKET_FIELD_TRANSACTION },                    \
336         { "tl", 16, 6 },                                                \
337         { "rt", 22, 2, PACKET_FIELD_DETAIL, retry_names },              \
338         { "tcode", 24, 4, PACKET_FIELD_TRANSACTION, tcode_names },      \
339         { "pri", 28, 4, PACKET_FIELD_DETAIL },                          \
340         { "src", 32, 16, PACKET_FIELD_TRANSACTION },                    \
341         { "offs", 48, 48, PACKET_FIELD_TRANSACTION }
342
343 #define COMMON_RESPONSE_FIELDS                                          \
344         { "dest", 0, 16 },                                              \
345         { "tl", 16, 6 },                                                \
346         { "rt", 22, 2, PACKET_FIELD_DETAIL, retry_names },              \
347         { "tcode", 24, 4, 0, tcode_names },                             \
348         { "pri", 28, 4, PACKET_FIELD_DETAIL },                          \
349         { "src", 32, 16 },                                              \
350         { "rcode", 48, 4, PACKET_FIELD_TRANSACTION, rcode_names }
351
352 static const struct packet_field read_quadlet_request_fields[] = {
353         COMMON_REQUEST_FIELDS,
354         { "crc", 96, 32, PACKET_FIELD_DETAIL },
355         { "ack", 156, 4, 0, ack_names },
356 };
357
358 static const struct packet_field read_quadlet_response_fields[] = {
359         COMMON_RESPONSE_FIELDS,
360         { "data", 96, 32, PACKET_FIELD_TRANSACTION },
361         { "crc", 128, 32, PACKET_FIELD_DETAIL },
362         { "ack", 188, 4, 0, ack_names },
363 };
364
365 static const struct packet_field read_block_request_fields[] = {
366         COMMON_REQUEST_FIELDS,
367         { "data_length", 96, 16, PACKET_FIELD_TRANSACTION },
368         { "extended_tcode", 112, 16 },
369         { "crc", 128, 32, PACKET_FIELD_DETAIL },
370         { "ack", 188, 4, 0, ack_names },
371 };
372
373 static const struct packet_field block_response_fields[] = {
374         COMMON_RESPONSE_FIELDS,
375         { "data_length", 96, 16, PACKET_FIELD_DATA_LENGTH },
376         { "extended_tcode", 112, 16 },
377         { "crc", 128, 32, PACKET_FIELD_DETAIL },
378         { "data", 160, 0, PACKET_FIELD_TRANSACTION },
379         { "crc", -64, 32, PACKET_FIELD_DETAIL },
380         { "ack", -4, 4, 0, ack_names },
381 };
382
383 static const struct packet_field write_quadlet_request_fields[] = {
384         COMMON_REQUEST_FIELDS,
385         { "data", 96, 32, PACKET_FIELD_TRANSACTION },
386         { "ack", -4, 4, 0, ack_names },
387 };
388
389 static const struct packet_field block_request_fields[] = {
390         COMMON_REQUEST_FIELDS,
391         { "data_length", 96, 16, PACKET_FIELD_DATA_LENGTH | PACKET_FIELD_TRANSACTION },
392         { "extended_tcode", 112, 16, PACKET_FIELD_TRANSACTION },
393         { "crc", 128, 32, PACKET_FIELD_DETAIL },
394         { "data", 160, 0, PACKET_FIELD_TRANSACTION },
395         { "crc", -64, 32, PACKET_FIELD_DETAIL },
396         { "ack", -4, 4, 0, ack_names },
397 };
398
399 static const struct packet_field write_response_fields[] = {
400         COMMON_RESPONSE_FIELDS,
401         { "reserved", 64, 32, PACKET_FIELD_DETAIL },
402         { "ack", -4, 4, 0, ack_names },
403 };
404
405 static const struct packet_field iso_data_fields[] = {
406         { "data_length", 0, 16, PACKET_FIELD_DATA_LENGTH },
407         { "tag", 16, 2 },
408         { "channel", 18, 6 },
409         { "tcode", 24, 4, 0, tcode_names },
410         { "sy", 28, 4 },
411         { "crc", 32, 32, PACKET_FIELD_DETAIL },
412         { "data", 64, 0 },
413         { "crc", -64, 32, PACKET_FIELD_DETAIL },
414         { "ack", -4, 4, 0, ack_names },
415 };
416
417 static const struct packet_info packet_info[] = {
418         {
419                 .name           = "write_quadlet_request",
420                 .type           = PACKET_REQUEST,
421                 .response_tcode = TCODE_WRITE_RESPONSE,
422                 .fields         = write_quadlet_request_fields,
423                 .field_count    = array_length(write_quadlet_request_fields)
424         },
425         {
426                 .name           = "write_block_request",
427                 .type           = PACKET_REQUEST,
428                 .response_tcode = TCODE_WRITE_RESPONSE,
429                 .fields         = block_request_fields,
430                 .field_count    = array_length(block_request_fields)
431         },
432         {
433                 .name           = "write_response",
434                 .type           = PACKET_RESPONSE,
435                 .fields         = write_response_fields,
436                 .field_count    = array_length(write_response_fields)
437         },
438         {
439                 .name           = "reserved",
440                 .type           = PACKET_RESERVED,
441         },
442         {
443                 .name           = "read_quadlet_request",
444                 .type           = PACKET_REQUEST,
445                 .response_tcode = TCODE_READ_QUADLET_RESPONSE,
446                 .fields         = read_quadlet_request_fields,
447                 .field_count    = array_length(read_quadlet_request_fields)
448         },
449         {
450                 .name           = "read_block_request",
451                 .type           = PACKET_REQUEST,
452                 .response_tcode = TCODE_READ_BLOCK_RESPONSE,
453                 .fields         = read_block_request_fields,
454                 .field_count    = array_length(read_block_request_fields)
455         },
456         {
457                 .name           = "read_quadlet_response",
458                 .type           = PACKET_RESPONSE,
459                 .fields         = read_quadlet_response_fields,
460                 .field_count    = array_length(read_quadlet_response_fields)
461         },
462         {
463                 .name           = "read_block_response",
464                 .type           = PACKET_RESPONSE,
465                 .fields         = block_response_fields,
466                 .field_count    = array_length(block_response_fields)
467         },
468         {
469                 .name           = "cycle_start",
470                 .type           = PACKET_OTHER,
471                 .fields         = write_quadlet_request_fields,
472                 .field_count    = array_length(write_quadlet_request_fields)
473         },
474         {
475                 .name           = "lock_request",
476                 .type           = PACKET_REQUEST,
477                 .fields         = block_request_fields,
478                 .field_count    = array_length(block_request_fields)
479         },
480         {
481                 .name           = "iso_data",
482                 .type           = PACKET_OTHER,
483                 .fields         = iso_data_fields,
484                 .field_count    = array_length(iso_data_fields)
485         },
486         {
487                 .name           = "lock_response",
488                 .type           = PACKET_RESPONSE,
489                 .fields         = block_response_fields,
490                 .field_count    = array_length(block_response_fields)
491         },
492 };
493
494 static int
495 handle_request_packet(uint32_t *data, size_t length)
496 {
497         struct link_packet *p = (struct link_packet *) data;
498         struct subaction *sa, *prev;
499         struct link_transaction *t;
500
501         t = link_transaction_lookup(p->common.source, p->common.destination,
502                         p->common.tlabel);
503         sa = subaction_create(data, length);
504         t->request = sa;
505
506         if (!list_empty(&t->request_list)) {
507                 prev = list_tail(&t->request_list,
508                                  struct subaction, link);
509
510                 if (!ACK_BUSY(prev->ack)) {
511                         /*
512                          * error, we should only see ack_busy_* before the
513                          * ack_pending/ack_complete -- this is an ack_pending
514                          * instead (ack_complete would have finished the
515                          * transaction).
516                          */
517                 }
518
519                 if (prev->packet.common.tcode != sa->packet.common.tcode ||
520                     prev->packet.common.tlabel != sa->packet.common.tlabel) {
521                         /* memcmp() ? */
522                         /* error, these should match for retries. */
523                 }
524         }
525
526         list_append(&t->request_list, &sa->link);
527
528         switch (sa->ack) {
529         case ACK_COMPLETE:
530                 if (p->common.tcode != TCODE_WRITE_QUADLET_REQUEST &&
531                     p->common.tcode != TCODE_WRITE_BLOCK_REQUEST)
532                         /* error, unified transactions only allowed for write */;
533                 list_remove(&t->link);
534                 handle_transaction(t);
535                 break;
536
537         case ACK_NO_ACK:
538         case ACK_DATA_ERROR:
539         case ACK_TYPE_ERROR:
540                 list_remove(&t->link);
541                 handle_transaction(t);
542                 break;
543
544         case ACK_PENDING:
545                 /* request subaction phase over, wait for response. */
546                 break;
547
548         case ACK_BUSY_X:
549         case ACK_BUSY_A:
550         case ACK_BUSY_B:
551                 /* ok, wait for retry. */
552                 /* check that retry protocol is respected. */
553                 break;
554         }
555
556         return 1;
557 }
558
559 static int
560 handle_response_packet(uint32_t *data, size_t length)
561 {
562         struct link_packet *p = (struct link_packet *) data;
563         struct subaction *sa, *prev;
564         struct link_transaction *t;
565
566         t = link_transaction_lookup(p->common.destination, p->common.source,
567                         p->common.tlabel);
568         if (list_empty(&t->request_list)) {
569                 /* unsolicited response */
570         }
571
572         sa = subaction_create(data, length);
573         t->response = sa;
574
575         if (!list_empty(&t->response_list)) {
576                 prev = list_tail(&t->response_list, struct subaction, link);
577
578                 if (!ACK_BUSY(prev->ack)) {
579                         /*
580                          * error, we should only see ack_busy_* before the
581                          * ack_pending/ack_complete
582                          */
583                 }
584
585                 if (prev->packet.common.tcode != sa->packet.common.tcode ||
586                     prev->packet.common.tlabel != sa->packet.common.tlabel) {
587                         /* use memcmp() instead? */
588                         /* error, these should match for retries. */
589                 }
590         } else {
591                 prev = list_tail(&t->request_list, struct subaction, link);
592                 if (prev->ack != ACK_PENDING) {
593                         /*
594                          * error, should not get response unless last request got
595                          * ack_pending.
596                          */
597                 }
598
599                 if (packet_info[prev->packet.common.tcode].response_tcode !=
600                     sa->packet.common.tcode) {
601                         /* error, tcode mismatch */
602                 }
603         }
604
605         list_append(&t->response_list, &sa->link);
606
607         switch (sa->ack) {
608         case ACK_COMPLETE:
609         case ACK_NO_ACK:
610         case ACK_DATA_ERROR:
611         case ACK_TYPE_ERROR:
612                 list_remove(&t->link);
613                 handle_transaction(t);
614                 /* transaction complete, remove t from pending list. */
615                 break;
616
617         case ACK_PENDING:
618                 /* error for responses. */
619                 break;
620
621         case ACK_BUSY_X:
622         case ACK_BUSY_A:
623         case ACK_BUSY_B:
624                 /* no problem, wait for next retry */
625                 break;
626         }
627
628         return 1;
629 }
630
631 static int
632 handle_packet(uint32_t *data, size_t length)
633 {
634         if (length == 0) {
635                 printf("bus reset\r\n");
636                 clear_pending_transaction_list();
637         } else if (length > sizeof(struct phy_packet)) {
638                 struct link_packet *p = (struct link_packet *) data;
639
640                 switch (packet_info[p->common.tcode].type) {
641                 case PACKET_REQUEST:
642                         return handle_request_packet(data, length);
643
644                 case PACKET_RESPONSE:
645                         return handle_response_packet(data, length);
646
647                 case PACKET_OTHER:
648                 case PACKET_RESERVED:
649                         return 0;
650                 }
651         }
652
653         return 1;
654 }
655
656 static unsigned int
657 get_bits(struct link_packet *packet, int offset, int width)
658 {
659         uint32_t *data = (uint32_t *) packet;
660         uint32_t index, shift, mask;
661
662         index = offset / 32 + 1;
663         shift = 32 - (offset & 31) - width;
664         mask = width == 32 ? ~0 : (1 << width) - 1;
665
666         return (data[index] >> shift) & mask;
667 }
668
669 #if __BYTE_ORDER == __LITTLE_ENDIAN
670 #define byte_index(i) ((i) ^ 3)
671 #elif __BYTE_ORDER == __BIG_ENDIAN
672 #define byte_index(i) (i)
673 #else
674 #error unsupported byte order.
675 #endif
676
677 static void
678 dump_data(unsigned char *data, int length)
679 {
680         int i, print_length;
681
682         if (length > 128)
683                 print_length = 128;
684         else
685                 print_length = length;
686
687         for (i = 0; i < print_length; i++)
688                 printf("%s%02hhx",
689                        (i % 4 == 0 && i != 0) ? " " : "",
690                        data[byte_index(i)]);
691
692         if (print_length < length)
693                 printf(" (%d more bytes)", length - print_length);
694 }
695
696 static void
697 decode_link_packet(struct link_packet *packet, size_t length,
698                    int include_flags, int exclude_flags)
699 {
700         const struct packet_info *pi;
701         int data_length = 0;
702         int i;
703
704         pi = &packet_info[packet->common.tcode];
705
706         for (i = 0; i < pi->field_count; i++) {
707                 const struct packet_field *f = &pi->fields[i];
708                 int offset;
709
710                 if (f->flags & exclude_flags)
711                         continue;
712                 if (include_flags && !(f->flags & include_flags))
713                         continue;
714
715                 if (f->offset < 0)
716                         offset = length * 8 + f->offset - 32;
717                 else
718                         offset = f->offset;
719
720                 if (f->value_names != NULL) {
721                         uint32_t bits;
722
723                         bits = get_bits(packet, offset, f->width);
724                         printf("%s", f->value_names[bits]);
725                 } else if (f->width == 0) {
726                         printf("%s=[", f->name);
727                         dump_data((unsigned char *) packet + (offset / 8 + 4), data_length);
728                         printf("]");
729                 } else {
730                         unsigned long long bits;
731                         int high_width, low_width;
732
733                         if ((offset & ~31) != ((offset + f->width - 1) & ~31)) {
734                                 /* Bit field spans quadlet boundary. */
735                                 high_width = ((offset + 31) & ~31) - offset;
736                                 low_width = f->width - high_width;
737
738                                 bits = get_bits(packet, offset, high_width);
739                                 bits = (bits << low_width) |
740                                         get_bits(packet, offset + high_width, low_width);
741                         } else {
742                                 bits = get_bits(packet, offset, f->width);
743                         }
744
745                         printf("%s=0x%0*llx", f->name, (f->width + 3) / 4, bits);
746
747                         if (f->flags & PACKET_FIELD_DATA_LENGTH)
748                                 data_length = bits;
749                 }
750
751                 if (i < pi->field_count - 1)
752                         printf(", ");
753         }
754 }
755
756 static void
757 print_packet(uint32_t *data, size_t length)
758 {
759         int i;
760
761         printf("%6u  ", data[0]);
762
763         if (length == 4) {
764                 printf("bus reset");
765         } else if (length < sizeof(struct phy_packet)) {
766                 printf("short packet: ");
767                 for (i = 1; i < length / 4; i++)
768                         printf("%s%08x", i == 0 ? "[" : " ", data[i]);
769                 printf("]");
770
771         } else if (length == sizeof(struct phy_packet) && data[1] == ~data[2]) {
772                 struct phy_packet *pp = (struct phy_packet *) data;
773
774                 /* phy packet are 3 quadlets: the 1 quadlet payload,
775                  * the bitwise inverse of the payload and the snoop
776                  * mode ack */
777
778                 switch (pp->common.identifier) {
779                 case PHY_PACKET_CONFIGURATION:
780                         if (!pp->phy_config.set_root && !pp->phy_config.set_gap_count) {
781                                 printf("ext phy config: phy_id=%02x", pp->phy_config.root_id);
782                         } else {
783                                 printf("phy config:");
784                                 if (pp->phy_config.set_root)
785                                         printf(" set_root_id=%02x", pp->phy_config.root_id);
786                                 if (pp->phy_config.set_gap_count)
787                                         printf(" set_gap_count=%d", pp->phy_config.gap_count);
788                         }
789                         break;
790
791                 case PHY_PACKET_LINK_ON:
792                         printf("link-on packet, phy_id=%02x", pp->link_on.phy_id);
793                         break;
794
795                 case PHY_PACKET_SELF_ID:
796                         if (pp->self_id.extended) {
797                                 printf("extended self id: phy_id=%02x, seq=%d",
798                                        pp->ext_self_id.phy_id, pp->ext_self_id.sequence);
799                         } else {
800                                 static const char * const speed_names[] = {
801                                         "S100", "S200", "S400", "BETA"
802                                 };
803                                 printf("self id: phy_id=%02x, link %s, gap_count=%d, speed=%s%s%s",
804                                        pp->self_id.phy_id,
805                                        (pp->self_id.link_active ? "active" : "not active"),
806                                        pp->self_id.gap_count,
807                                        speed_names[pp->self_id.phy_speed],
808                                        (pp->self_id.contender ? ", irm contender" : ""),
809                                        (pp->self_id.initiated_reset ? ", initiator" : ""));
810                         }
811                         break;
812                 default:
813                         printf("unknown phy packet: ");
814                         for (i = 1; i < length / 4; i++)
815                                 printf("%s%08x", i == 0 ? "[" : " ", data[i]);
816                         printf("]");
817                         break;
818                 }
819         } else {
820                 struct link_packet *packet = (struct link_packet *) data;
821
822                 decode_link_packet(packet, length, 0,
823                                    option_verbose ? 0 : PACKET_FIELD_DETAIL);
824         }
825
826         if (option_hex) {
827                 printf("  [");
828                 dump_data((unsigned char *) data + 4, length - 4);
829                 printf("]");
830         }
831
832         printf("\r\n");
833 }
834
835 #define HIDE_CURSOR     "\033[?25l"
836 #define SHOW_CURSOR     "\033[?25h"
837 #define CLEAR           "\033[H\033[2J"
838
839 static void
840 print_stats(uint32_t *data, size_t length)
841 {
842         static int bus_reset_count, short_packet_count, phy_packet_count;
843         static int tcode_count[16];
844         static struct timeval last_update;
845         struct timeval now;
846         int i;
847
848         if (length == 0)
849                 bus_reset_count++;
850         else if (length < sizeof(struct phy_packet))
851                 short_packet_count++;
852         else if (length == sizeof(struct phy_packet) && data[1] == ~data[2])
853                 phy_packet_count++;
854         else {
855                 struct link_packet *packet = (struct link_packet *) data;
856                 tcode_count[packet->common.tcode]++;
857         }
858
859         gettimeofday(&now, NULL);
860         if (now.tv_sec <= last_update.tv_sec &&
861             now.tv_usec < last_update.tv_usec + 500000)
862                 return;
863
864         last_update = now;
865         printf(CLEAR HIDE_CURSOR
866                "  bus resets              : %8d\n"
867                "  short packets           : %8d\n"
868                "  phy packets             : %8d\n",
869                bus_reset_count, short_packet_count, phy_packet_count);
870
871         for (i = 0; i < array_length(packet_info); i++)
872                 if (packet_info[i].type != PACKET_RESERVED)
873                         printf("  %-24s: %8d\n", packet_info[i].name, tcode_count[i]);
874         printf(SHOW_CURSOR "\n");
875 }
876
877 static struct termios saved_attributes;
878
879 static void
880 reset_input_mode(void)
881 {
882         tcsetattr(STDIN_FILENO, TCSANOW, &saved_attributes);
883 }
884
885 static void
886 set_input_mode(void)
887 {
888         struct termios tattr;
889
890         /* Make sure stdin is a terminal. */
891         if (!isatty(STDIN_FILENO)) {
892                 fprintf(stderr, "Not a terminal.\n");
893                 exit(EXIT_FAILURE);
894         }
895
896         /* Save the terminal attributes so we can restore them later. */
897         tcgetattr(STDIN_FILENO, &saved_attributes);
898         atexit(reset_input_mode);
899
900         /* Set the funny terminal modes. */
901         tcgetattr(STDIN_FILENO, &tattr);
902         tattr.c_lflag &= ~(ICANON|ECHO); /* Clear ICANON and ECHO. */
903         tattr.c_cc[VMIN] = 1;
904         tattr.c_cc[VTIME] = 0;
905         tcsetattr(STDIN_FILENO, TCSAFLUSH, &tattr);
906 }
907
908 int main(int argc, const char *argv[])
909 {
910         uint32_t buf[128 * 1024];
911         uint32_t filter;
912         int length, retval, view;
913         int fd = -1;
914         FILE *output = NULL, *input = NULL;
915         poptContext con;
916         char c;
917         struct pollfd pollfds[2];
918
919         sys_sigint_handler = signal(SIGINT, sigint_handler);
920
921         con = poptGetContext(NULL, argc, argv, options, 0);
922         retval = poptGetNextOpt(con);
923         if (retval < -1) {
924                 poptPrintUsage(con, stdout, 0);
925                 return -1;
926         }
927
928         if (option_version) {
929                 printf("dump tool for nosy sniffer, version %s\n", VERSION);
930                 return 0;
931         }
932
933         if (__BYTE_ORDER != __LITTLE_ENDIAN)
934                 fprintf(stderr, "warning: nosy has only been tested on little "
935                         "endian machines\n");
936
937         if (option_input != NULL) {
938                 input = fopen(option_input, "r");
939                 if (input == NULL) {
940                         fprintf(stderr, "Could not open %s, %m\n", option_input);
941                         return -1;
942                 }
943         } else {
944                 fd = open(option_nosy_device, O_RDWR);
945                 if (fd < 0) {
946                         fprintf(stderr, "Could not open %s, %m\n", option_nosy_device);
947                         return -1;
948                 }
949                 set_input_mode();
950         }
951
952         if (strcmp(option_view, "transaction") == 0)
953                 view = VIEW_TRANSACTION;
954         else if (strcmp(option_view, "stats") == 0)
955                 view = VIEW_STATS;
956         else
957                 view = VIEW_PACKET;
958
959         if (option_output) {
960                 output = fopen(option_output, "w");
961                 if (output == NULL) {
962                         fprintf(stderr, "Could not open %s, %m\n", option_output);
963                         return -1;
964                 }
965         }
966
967         setvbuf(stdout, NULL, _IOLBF, BUFSIZ);
968
969         filter = ~0;
970         if (!option_iso)
971                 filter &= ~(1 << TCODE_STREAM_DATA);
972         if (!option_cycle_start)
973                 filter &= ~(1 << TCODE_CYCLE_START);
974         if (view == VIEW_STATS)
975                 filter = ~(1 << TCODE_CYCLE_START);
976
977         ioctl(fd, NOSY_IOC_FILTER, filter);
978
979         ioctl(fd, NOSY_IOC_START);
980
981         pollfds[0].fd = fd;
982         pollfds[0].events = POLLIN;
983         pollfds[1].fd = STDIN_FILENO;
984         pollfds[1].events = POLLIN;
985
986         while (run) {
987                 if (input != NULL) {
988                         if (fread(&length, sizeof length, 1, input) != 1)
989                                 return 0;
990                         fread(buf, 1, length, input);
991                 } else {
992                         poll(pollfds, 2, -1);
993                         if (pollfds[1].revents) {
994                                 read(STDIN_FILENO, &c, sizeof c);
995                                 switch (c) {
996                                 case 'q':
997                                         if (output != NULL)
998                                                 fclose(output);
999                                         return 0;
1000                                 }
1001                         }
1002
1003                         if (pollfds[0].revents)
1004                                 length = read(fd, buf, sizeof buf);
1005                         else
1006                                 continue;
1007                 }
1008
1009                 if (output != NULL) {
1010                         fwrite(&length, sizeof length, 1, output);
1011                         fwrite(buf, 1, length, output);
1012                 }
1013
1014                 switch (view) {
1015                 case VIEW_TRANSACTION:
1016                         handle_packet(buf, length);
1017                         break;
1018                 case VIEW_PACKET:
1019                         print_packet(buf, length);
1020                         break;
1021                 case VIEW_STATS:
1022                         print_stats(buf, length);
1023                         break;
1024                 }
1025         }
1026
1027         if (output != NULL)
1028                 fclose(output);
1029
1030         close(fd);
1031
1032         poptFreeContext(con);
1033
1034         return 0;
1035 }