fwcrom.c

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    1 /*      $NetBSD: fwcrom.c,v 1.17 2014/11/21 23:37:25 joerg Exp $        */
    2 /*-
    3  * Copyright (c) 2002-2003
    4  *      Hidetoshi Shimokawa. All rights reserved.
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  * 3. All advertising materials mentioning features or use of this software
   15  *    must display the following acknowledgement:
   16  *
   17  *      This product includes software developed by Hidetoshi Shimokawa.
   18  *
   19  * 4. Neither the name of the author nor the names of its contributors
   20  *    may be used to endorse or promote products derived from this software
   21  *    without specific prior written permission.
   22  *
   23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   33  * SUCH DAMAGE.
   34  */
   35 
   36 #include <sys/cdefs.h>
   37 __KERNEL_RCSID(0, "$NetBSD: fwcrom.c,v 1.17 2014/11/21 23:37:25 joerg Exp $");
   38 
   39 #include <sys/param.h>
   40 #ifdef _KERNEL
   41 #include <sys/device.h>
   42 #include <sys/errno.h>
   43 #include <sys/systm.h>
   44 #else
   45 #include <stdio.h>
   46 #include <string.h>
   47 #endif
   48 #include <dev/ieee1394/firewire.h>
   49 #include <dev/ieee1394/iec13213.h>
   50 
   51 #define MAX_ROM (1024 - sizeof(uint32_t) * 5)
   52 #define CROM_END(cc) ((char *)(cc)->stack[0].dir + MAX_ROM - 1)
   53 
   54 void
   55 crom_init_context(struct crom_context *cc, uint32_t *p)
   56 {
   57         struct csrhdr *hdr;
   58 
   59         hdr = (struct csrhdr *)p;
   60         if (hdr->info_len <= 1) {
   61                 /* minimum or invalid ROM */
   62                 cc->depth = -1;
   63                 return;
   64         }
   65         p += 1 + hdr->info_len;
   66 
   67         /* check size of root directory */
   68         if (((struct csrdirectory *)p)->crc_len == 0) {
   69                 cc->depth = -1;
   70                 return;
   71         }
   72         cc->depth = 0;
   73         cc->stack[0].dir = (struct csrdirectory *)p;
   74         cc->stack[0].index = 0;
   75 }
   76 
   77 struct csrreg *
   78 crom_get(struct crom_context *cc)
   79 {
   80         struct crom_ptr *ptr;
   81 
   82         ptr = &cc->stack[cc->depth];
   83         return &ptr->dir->entry[ptr->index];
   84 }
   85 
   86 void
   87 crom_next(struct crom_context *cc)
   88 {
   89         struct crom_ptr *ptr;
   90         struct csrreg *reg;
   91 
   92         if (cc->depth < 0)
   93                 return;
   94         reg = crom_get(cc);
   95         if ((reg->key & CSRTYPE_MASK) == CSRTYPE_D) {
   96                 if (cc->depth >= CROM_MAX_DEPTH) {
   97                         printf("crom_next: too deep\n");
   98                         goto again;
   99                 }
  100                 cc->depth++;
  101 
  102                 ptr = &cc->stack[cc->depth];
  103                 ptr->dir = (struct csrdirectory *)(reg + reg->val);
  104                 ptr->index = 0;
  105                 goto check;
  106         }
  107 again:
  108         ptr = &cc->stack[cc->depth];
  109         ptr->index++;
  110 check:
  111         if (ptr->index < ptr->dir->crc_len &&
  112             (char *)crom_get(cc) <= CROM_END(cc))
  113                 return;
  114 
  115         if (ptr->index < ptr->dir->crc_len)
  116                 printf("crom_next: bound check failed\n");
  117 
  118         if (cc->depth > 0) {
  119                 cc->depth--;
  120                 goto again;
  121         }
  122         /* no more data */
  123         cc->depth = -1;
  124 }
  125 
  126 
  127 struct csrreg *
  128 crom_search_key(struct crom_context *cc, uint8_t key)
  129 {
  130         struct csrreg *reg;
  131 
  132         while (cc->depth >= 0) {
  133                 reg = crom_get(cc);
  134                 if (reg->key == key)
  135                         return reg;
  136                 crom_next(cc);
  137         }
  138         return NULL;
  139 }
  140 
  141 int
  142 crom_has_specver(uint32_t *p, uint32_t spec, uint32_t ver)
  143 {
  144         struct csrreg *reg;
  145         struct crom_context c, *cc;
  146         int state = 0;
  147 
  148         cc = &c;
  149         crom_init_context(cc, p);
  150         while (cc->depth >= 0) {
  151                 reg = crom_get(cc);
  152                 if (state == 0) {
  153                         if (reg->key == CSRKEY_SPEC && reg->val == spec)
  154                                 state = 1;
  155                         else
  156                                 state = 0;
  157                 } else {
  158                         if (reg->key == CSRKEY_VER && reg->val == ver)
  159                                 return 1;
  160                         else
  161                                 state = 0;
  162                 }
  163                 crom_next(cc);
  164         }
  165         return 0;
  166 }
  167 
  168 void
  169 crom_parse_text(struct crom_context *cc, char *buf, int len)
  170 {
  171         struct csrreg *reg;
  172         struct csrtext *textleaf;
  173         uint32_t *bp;
  174         int i, qlen;
  175         static const char nullstr[] = "(null)";
  176 
  177         if (cc->depth < 0)
  178                 return;
  179 
  180         reg = crom_get(cc);
  181         switch (reg->key) {
  182         case CROM_TEXTLEAF:
  183         case CROM_TEXTLEAF2:
  184                 break;
  185         default:
  186                 if ((char *)(reg + reg->val) > CROM_END(cc)) {
  187                         strncpy(buf, nullstr, len);
  188                         return;
  189                 }
  190                 break;
  191         }
  192         textleaf = (struct csrtext *)(reg + reg->val);
  193 
  194         if ((char *)textleaf + textleaf->crc_len > CROM_END(cc)) {
  195                 strncpy(buf, nullstr, len);
  196                 return;
  197         }
  198 
  199         /* XXX should check spec and type */
  200 
  201         bp = (uint32_t *)buf;
  202         qlen = textleaf->crc_len - 2;
  203         if (len < qlen * 4)
  204                 qlen = len/4;
  205         for (i = 0; i < qlen; i++)
  206                 *bp++ = ntohl(textleaf->text[i]);
  207         /* make sure to terminate the string */
  208         if (len <= qlen * 4)
  209                 buf[len - 1] = 0;
  210         else
  211                 buf[qlen * 4] = 0;
  212 }
  213 
  214 uint16_t
  215 crom_crc(uint32_t *ptr, int len)
  216 {
  217         int i, shift;
  218         uint32_t data, sum, crc = 0;
  219 
  220         for (i = 0; i < len; i++) {
  221                 data = ptr[i];
  222                 for (shift = 28; shift >= 0; shift -= 4) {
  223                         sum = ((crc >> 12) ^ (data >> shift)) & 0xf;
  224                         crc = (crc << 4) ^ (sum << 12) ^ (sum << 5) ^ sum;
  225                 }
  226                 crc &= 0xffff;
  227         }
  228         return (uint16_t)crc;
  229 }
  230 
  231 #if !defined(_KERNEL) && !defined(_BOOT)
  232 static void
  233 crom_desc_specver(uint32_t spec, uint32_t ver, char *buf, int len)
  234 {
  235         const char *s = NULL;
  236 
  237         if (spec == CSRVAL_ANSIT10 || spec == 0) {
  238                 switch (ver) {
  239                 case CSRVAL_T10SBP2:
  240                         s = "SBP-2";
  241                         break;
  242                 default:
  243                         if (spec != 0)
  244                                 s = "unknown ANSIT10";
  245                 }
  246         }
  247         if (spec == CSRVAL_1394TA || spec == 0) {
  248                 switch (ver) {
  249                 case CSR_PROTAVC:
  250                         s = "AV/C";
  251                         break;
  252                 case CSR_PROTCAL:
  253                         s = "CAL";
  254                         break;
  255                 case CSR_PROTEHS:
  256                         s = "EHS";
  257                         break;
  258                 case CSR_PROTHAVI:
  259                         s = "HAVi";
  260                         break;
  261                 case CSR_PROTCAM104:
  262                         s = "1394 Cam 1.04";
  263                         break;
  264                 case CSR_PROTCAM120:
  265                         s = "1394 Cam 1.20";
  266                         break;
  267                 case CSR_PROTCAM130:
  268                         s = "1394 Cam 1.30";
  269                         break;
  270                 case CSR_PROTDPP:
  271                         s = "1394 Direct print";
  272                         break;
  273                 case CSR_PROTIICP:
  274                         s = "Industrial & Instrument";
  275                         break;
  276                 default:
  277                         if (spec != 0)
  278                                 s = "unknown 1394TA";
  279                 }
  280         }
  281         if (s != NULL)
  282                 snprintf(buf, len, "%s", s);
  283 }
  284 
  285 const char *
  286 crom_desc(struct crom_context *cc, char *buf, size_t len)
  287 {
  288         struct csrreg *reg;
  289         struct csrdirectory *dir;
  290         const char *desc;
  291         uint16_t crc;
  292         size_t l = 0;
  293 
  294         reg = crom_get(cc);
  295         switch (reg->key & CSRTYPE_MASK) {
  296         case CSRTYPE_I:
  297 #if 0
  298                 l += snprintf(buf + l, len - l, "0x%x", reg->val);
  299 #else
  300                 *buf = '\0';
  301 #endif
  302                 break;
  303         case CSRTYPE_C:
  304                 l += snprintf(buf + l, len - l, "offset=0x%04x(%d)",
  305                     reg->val, reg->val);
  306                 break;
  307         case CSRTYPE_L:
  308                 /* XXX fall through */
  309         case CSRTYPE_D:
  310                 dir = (struct csrdirectory *) (reg + reg->val);
  311                 crc = crom_crc((uint32_t *)dir->entry, dir->crc_len);
  312                 l += snprintf(buf + l, len - l, "len=%d crc=0x%04x ",
  313                     dir->crc_len, crc);
  314 
  315                 if (l > len)
  316                         l = len;
  317                 if (crc == dir->crc)
  318                         l += snprintf(buf + l, len - l, "(OK) ");
  319                 else
  320                         l += snprintf(buf + l, len - l, "(NG, 0x%x) ",
  321                             dir->crc);
  322         }
  323         if (l > len)
  324                 l = len;
  325         switch (reg->key) {
  326         case CSRKEY_VENDOR: /* 0x03 */
  327                 desc = "module_vendor_ID";
  328                 break;
  329         case CSRKEY_HW: /* 0x04 */
  330                 desc = "hardware_version";
  331                 break;
  332         case CSRKEY_NCAP: /* 0x0c */
  333                 desc = "node_capabilities";
  334                 break;
  335         case CSRKEY_SPEC: /* 0x12 */
  336                 desc = "unit_spec_ID";
  337                 break;
  338         case CSRKEY_VER: /* 0x13 */
  339                 desc = "unit_sw_version";
  340                 crom_desc_specver(0, reg->val, buf, len);
  341                 break;
  342         case CSRKEY_DINFO: /* 0x14 */
  343                 desc = "logical_unit_number";
  344                 break;
  345         case CSRKEY_MODEL: /* 0x17 */
  346                 desc = "model_ID";
  347                 break;
  348         case CSRKEY_REV: /* 0x21 */
  349                 desc = "revision_ID";
  350                 break;
  351         case 0x38:
  352                 desc = "command_set_spec_ID";
  353                 break;
  354         case 0x39:
  355                 desc = "command_set";
  356                 break;
  357         case 0x3a:
  358                 desc = "unit_characteristics";
  359                 break;
  360         case 0x3b:
  361                 desc = "command_set_revision";
  362                 break;
  363         case 0x3c:
  364                 desc = "firmware_revision";
  365                 break;
  366         case 0x3d:
  367                 desc = "reconnect_timeout";
  368                 break;
  369         case 0x40:
  370                 desc = "command_regs_base";
  371                 break;
  372         case 0x54:
  373                 desc = "management_agent";
  374                 break;
  375         case CROM_TEXTLEAF: /* 0x81 */
  376         case CROM_TEXTLEAF2: /* 0x82 */
  377                 desc = "text_leaf";
  378                 crom_parse_text(cc, buf + l, len - l);
  379                 break;
  380         case CROM_NODEID: /* 0x8d */
  381                 desc = "node_unique_ID";
  382                 break;
  383         case 0xd1:
  384                 desc = "unit_directory";
  385                 break;
  386         case 0xd4:
  387                 desc = "logical_unit_directory";
  388                 break;
  389         default:
  390                 desc = "unknown";
  391         }
  392         return desc;
  393 }
  394 #endif
  395 
  396 #if defined(_KERNEL) || defined(_BOOT) || defined(TEST)
  397 
  398 int
  399 crom_add_quad(struct crom_chunk *chunk, uint32_t entry)
  400 {
  401         int index;
  402 
  403         index = chunk->data.crc_len;
  404         if (index >= CROM_MAX_CHUNK_LEN - 1) {
  405                 printf("too large chunk %d\n", index);
  406                 return -1;
  407         }
  408         chunk->data.buf[index] = entry;
  409         chunk->data.crc_len++;
  410         return index;
  411 }
  412 
  413 int
  414 crom_add_entry(struct crom_chunk *chunk, int key, int val)
  415 {
  416         union {
  417                 struct csrreg reg;
  418                 uint32_t i;
  419         } foo;
  420 
  421         foo.reg.key = key;
  422         foo.reg.val = val;
  423 
  424         return crom_add_quad(chunk, foo.i);
  425 }
  426 
  427 int
  428 crom_add_chunk(struct crom_src *src, struct crom_chunk *parent,
  429                struct crom_chunk *child, int key)
  430 {
  431         int index;
  432 
  433         if (parent == NULL) {
  434                 STAILQ_INSERT_TAIL(&src->chunk_list, child, link);
  435                 return 0;
  436         }
  437 
  438         index = crom_add_entry(parent, key, 0);
  439         if (index < 0)
  440                 return -1;
  441         child->ref_chunk = parent;
  442         child->ref_index = index;
  443         STAILQ_INSERT_TAIL(&src->chunk_list, child, link);
  444         return index;
  445 }
  446 
  447 #define MAX_TEXT (int)((CROM_MAX_CHUNK_LEN + 1) * 4 - sizeof(struct csrtext))
  448 int
  449 crom_add_simple_text(struct crom_src *src, struct crom_chunk *parent,
  450                      struct crom_chunk *chunk, const char *buf)
  451 {
  452         struct csrtext *tl;
  453         uint32_t *p;
  454         int len, i;
  455         char t[MAX_TEXT];
  456 
  457         len = strlen(buf);
  458         if (len > MAX_TEXT) {
  459                 printf("text(%d) trancated to %d.\n", len, MAX_TEXT);
  460                 len = MAX_TEXT;
  461         }
  462 
  463         tl = (struct csrtext *) &chunk->data;
  464         tl->crc_len = howmany(sizeof(struct csrtext) + len, sizeof(uint32_t));
  465         tl->spec_id = 0;
  466         tl->spec_type = 0;
  467         tl->lang_id = 0;
  468         memset(t, 0, roundup2(len, sizeof(uint32_t)));
  469         memcpy(t, buf, len);
  470         p = (uint32_t *)t;
  471         for (i = 0; i < howmany(len, sizeof(uint32_t)); i++)
  472                 tl->text[i] = ntohl(*p++);
  473         return crom_add_chunk(src, parent, chunk, CROM_TEXTLEAF);
  474 }
  475 
  476 static int
  477 crom_copy(uint32_t *src, uint32_t *dst, int *offset, int len, int maxlen)
  478 {
  479 
  480         if (*offset + len > maxlen) {
  481                 printf("Config. ROM is too large for the buffer\n");
  482                 return -1;
  483         }
  484         memcpy((char *)(dst + *offset), src, len * sizeof(uint32_t));
  485         *offset += len;
  486         return 0;
  487 }
  488 
  489 int
  490 crom_load(struct crom_src *src, uint32_t *buf, int maxlen)
  491 {
  492         struct crom_chunk *chunk, *parent;
  493         struct csrhdr *hdr;
  494 #if defined(_KERNEL) || defined(_BOOT)
  495         uint32_t *ptr;
  496         int i;
  497 #endif
  498         int count, offset;
  499         int len;
  500 
  501         offset = 0;
  502         /* Determine offset */
  503         STAILQ_FOREACH(chunk, &src->chunk_list, link) {
  504                 chunk->offset = offset;
  505                 /* Assume the offset of the parent is already known */
  506                 parent = chunk->ref_chunk;
  507                 if (parent != NULL) {
  508                         struct csrreg *reg;
  509                         const int ref_index = chunk->ref_index;
  510 
  511                         reg = (struct csrreg *)&parent->data.buf[ref_index];
  512                         reg->val =
  513                             offset - (parent->offset + 1 + chunk->ref_index);
  514                 }
  515                 offset += (1 + chunk->data.crc_len);
  516         }
  517 
  518         /* Calculate CRC and dump to the buffer */
  519         len = 1 + src->hdr.info_len;
  520         count = 0;
  521         if (crom_copy((uint32_t *)&src->hdr, buf, &count, len, maxlen) < 0)
  522                 return -1;
  523         STAILQ_FOREACH(chunk, &src->chunk_list, link) {
  524                 chunk->data.crc =
  525                     crom_crc(chunk->data.buf, chunk->data.crc_len);
  526 
  527                 len = 1 + chunk->data.crc_len;
  528                 if (crom_copy((uint32_t *)&chunk->data, buf, &count, len,
  529                                                                 maxlen) < 0)
  530                         return -1;
  531         }
  532         hdr = (struct csrhdr *)buf;
  533         hdr->crc_len = count - 1;
  534         hdr->crc = crom_crc(&buf[1], hdr->crc_len);
  535 
  536 #if defined(_KERNEL) || defined(_BOOT)
  537         /* byte swap */
  538         ptr = buf;
  539         for (i = 0; i < count; i++) {
  540                 *ptr = htonl(*ptr);
  541                 ptr++;
  542         }
  543 #endif
  544 
  545         return count;
  546 }
  547 #endif
  548 
  549 #ifdef TEST
  550 int
  551 main(void)
  552 {
  553         struct crom_src src;
  554         struct crom_chunk root, unit[3], text[7];
  555         uint32_t buf[256], *p;
  556         int i;
  557         extern const char ostype[];
  558 
  559         memset(&src, 0, sizeof(src));
  560         memset(&root, 0, sizeof(root));
  561         memset(unit, 0, sizeof(unit));
  562         memset(text, 0, sizeof(text));
  563         memset(buf, 0, sizeof(buf));
  564 
  565         /* BUS info sample */
  566         src.hdr.info_len = 4;
  567         src.businfo.bus_name = CSR_BUS_NAME_IEEE1394;
  568         src.businfo.eui64.hi = 0x11223344;
  569         src.businfo.eui64.lo = 0x55667788;
  570         src.businfo.link_spd = FWSPD_S400;
  571         src.businfo.generation = 0;
  572         src.businfo.max_rom = MAXROM_4;
  573         src.businfo.max_rec = 10;
  574         src.businfo.cyc_clk_acc = 100;
  575         src.businfo.pmc = 0;
  576         src.businfo.bmc = 1;
  577         src.businfo.isc = 1;
  578         src.businfo.cmc = 1;
  579         src.businfo.irmc = 1;
  580         STAILQ_INIT(&src.chunk_list);
  581 
  582         /* Root directory */
  583         crom_add_chunk(&src, NULL, &root, 0);
  584         crom_add_entry(&root, CSRKEY_NCAP, 0x123456);
  585         /* private company_id */
  586         crom_add_entry(&root, CSRKEY_VENDOR, 0xacde48);
  587 
  588         crom_add_simple_text(&src, &root, &text[0], ostype);
  589         crom_add_entry(&root, CSRKEY_HW, __NetBSD_Version__);
  590         crom_add_simple_text(&src, &root, &text[1], OS_VER_STR);
  591 
  592         /* SBP unit directory */
  593         crom_add_chunk(&src, &root, &unit[0], CROM_UDIR);
  594         crom_add_entry(&unit[0], CSRKEY_SPEC, CSRVAL_ANSIT10);
  595         crom_add_entry(&unit[0], CSRKEY_VER, CSRVAL_T10SBP2);
  596         crom_add_entry(&unit[0], CSRKEY_COM_SPEC, CSRVAL_ANSIT10);
  597         crom_add_entry(&unit[0], CSRKEY_COM_SET, CSRVAL_SCSI);
  598         /* management_agent */
  599         crom_add_entry(&unit[0], CROM_MGM, 0x1000);
  600         crom_add_entry(&unit[0], CSRKEY_UNIT_CH, (10<<8) | 8);
  601         /* Device type and LUN */
  602         crom_add_entry(&unit[0], CROM_LUN, 0);
  603         crom_add_entry(&unit[0], CSRKEY_MODEL, 1);
  604         crom_add_simple_text(&src, &unit[0], &text[2], "scsi_target");
  605 
  606         /* RFC2734 IPv4 over IEEE1394 */
  607         crom_add_chunk(&src, &root, &unit[1], CROM_UDIR);
  608         crom_add_entry(&unit[1], CSRKEY_SPEC, CSRVAL_IETF);
  609         crom_add_simple_text(&src, &unit[1], &text[3], "IANA");
  610         crom_add_entry(&unit[1], CSRKEY_VER, 1);
  611         crom_add_simple_text(&src, &unit[1], &text[4], "IPv4");
  612 
  613         /* RFC3146 IPv6 over IEEE1394 */
  614         crom_add_chunk(&src, &root, &unit[2], CROM_UDIR);
  615         crom_add_entry(&unit[2], CSRKEY_SPEC, CSRVAL_IETF);
  616         crom_add_simple_text(&src, &unit[2], &text[5], "IANA");
  617         crom_add_entry(&unit[2], CSRKEY_VER, 2);
  618         crom_add_simple_text(&src, &unit[2], &text[6], "IPv6");
  619 
  620         crom_load(&src, buf, 256);
  621         p = buf;
  622 #define DUMP_FORMAT     "%08x %08x %08x %08x %08x %08x %08x %08x\n"
  623         for (i = 0; i < 256 / 8; i++) {
  624                 printf(DUMP_FORMAT,
  625                     p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7]);
  626                 p += 8;
  627         }
  628         return 0;
  629 }
  630 #endif
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FreeBSD/Linux Kernel Cross Reference sys/dev/ieee1394/fwcrom.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/ieee1394/fwcrom.c
