fwcrom.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-4-Clause
    3  *
    4  * Copyright (c) 2002-2003
    5  *      Hidetoshi Shimokawa. All rights reserved.
    6  * 
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. All advertising materials mentioning features or use of this software
   16  *    must display the following acknowledgement:
   17  *
   18  *      This product includes software developed by Hidetoshi Shimokawa.
   19  *
   20  * 4. Neither the name of the author nor the names of its contributors
   21  *    may be used to endorse or promote products derived from this software
   22  *    without specific prior written permission.
   23  * 
   24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   34  * SUCH DAMAGE.
   35  */
   36 
   37 #ifdef __FreeBSD__
   38 #include <sys/cdefs.h>
   39 __FBSDID("$FreeBSD$");
   40 #endif
   41 
   42 #include <sys/param.h>
   43 
   44 #ifdef _BOOT
   45 #include <stand.h>
   46 #include <bootstrap.h>
   47 #else
   48 #if defined(_KERNEL) || defined(TEST)
   49 #include <sys/queue.h>
   50 #endif
   51 #ifdef _KERNEL
   52 #include <sys/systm.h>
   53 #include <sys/kernel.h>
   54 #else
   55 #include <netinet/in.h>
   56 #include <fcntl.h>
   57 #include <stdio.h>
   58 #include <err.h>
   59 #include <stdlib.h>
   60 #include <string.h>
   61 #endif
   62 #endif
   63 
   64 #include <dev/firewire/firewire.h>
   65 #include <dev/firewire/iec13213.h>
   66 
   67 #define MAX_ROM (1024 - sizeof(uint32_t) * 5)
   68 #define CROM_END(cc) ((vm_offset_t)(cc)->stack[0].dir + MAX_ROM - 1)
   69 
   70 void
   71 crom_init_context(struct crom_context *cc, uint32_t *p)
   72 {
   73         struct csrhdr *hdr;
   74 
   75         hdr = (struct csrhdr *)p;
   76         if (hdr->info_len <= 1) {
   77                 /* minimum or invalid ROM */
   78                 cc->depth = -1;
   79                 return;
   80         }
   81         p += 1 + hdr->info_len;
   82 
   83         /* check size of root directory */
   84         if (((struct csrdirectory *)p)->crc_len == 0) {
   85                 cc->depth = -1;
   86                 return;
   87         }
   88         cc->depth = 0;
   89         cc->stack[0].dir = (struct csrdirectory *)p;
   90         cc->stack[0].index = 0;
   91 }
   92 
   93 struct csrreg *
   94 crom_get(struct crom_context *cc)
   95 {
   96         struct crom_ptr *ptr;
   97 
   98         ptr = &cc->stack[cc->depth];
   99         return (&ptr->dir->entry[ptr->index]);
  100 }
  101 
  102 void
  103 crom_next(struct crom_context *cc)
  104 {
  105         struct crom_ptr *ptr;
  106         struct csrreg *reg;
  107 
  108         if (cc->depth < 0)
  109                 return;
  110         reg = crom_get(cc);
  111         if ((reg->key & CSRTYPE_MASK) == CSRTYPE_D) {
  112                 if (cc->depth >= CROM_MAX_DEPTH) {
  113                         printf("crom_next: too deep\n");
  114                         goto again;
  115                 }
  116                 cc->depth++;
  117 
  118                 ptr = &cc->stack[cc->depth];
  119                 ptr->dir = (struct csrdirectory *) (reg + reg->val);
  120                 ptr->index = 0;
  121                 goto check;
  122         }
  123 again:
  124         ptr = &cc->stack[cc->depth];
  125         ptr->index++;
  126 check:
  127         if (ptr->index < ptr->dir->crc_len &&
  128             (vm_offset_t)crom_get(cc) <= CROM_END(cc))
  129                 return;
  130 
  131         if (ptr->index < ptr->dir->crc_len)
  132                 printf("crom_next: bound check failed\n");
  133 
  134         if (cc->depth > 0) {
  135                 cc->depth--;
  136                 goto again;
  137         }
  138         /* no more data */
  139         cc->depth = -1;
  140 }
  141 
  142 
  143 struct csrreg *
  144 crom_search_key(struct crom_context *cc, uint8_t key)
  145 {
  146         struct csrreg *reg;
  147 
  148         while (cc->depth >= 0) {
  149                 reg = crom_get(cc);
  150                 if (reg->key == key)
  151                         return reg;
  152                 crom_next(cc);
  153         }
  154         return NULL;
  155 }
  156 
  157 int
  158 crom_has_specver(uint32_t *p, uint32_t spec, uint32_t ver)
  159 {
  160         struct csrreg *reg;
  161         struct crom_context c, *cc;
  162         int state = 0;
  163 
  164         cc = &c;
  165         crom_init_context(cc, p);
  166         while (cc->depth >= 0) {
  167                 reg = crom_get(cc);
  168                 if (state == 0) {
  169                         if (reg->key == CSRKEY_SPEC && reg->val == spec)
  170                                 state = 1;
  171                         else
  172                                 state = 0;
  173                 } else {
  174                         if (reg->key == CSRKEY_VER && reg->val == ver)
  175                                 return 1;
  176                         else
  177                                 state = 0;
  178                 }
  179                 crom_next(cc);
  180         }
  181         return 0;
  182 }
  183 
  184 void
  185 crom_parse_text(struct crom_context *cc, char *buf, int len)
  186 {
  187         struct csrreg *reg;
  188         struct csrtext *textleaf;
  189         uint32_t *bp;
  190         int i, qlen;
  191         static char *nullstr = "(null)";
  192 
  193         if (cc->depth < 0)
  194                 return;
  195 
  196         reg = crom_get(cc);
  197         if (reg->key != CROM_TEXTLEAF ||
  198             (vm_offset_t)(reg + reg->val) > CROM_END(cc)) {
  199                 strncpy(buf, nullstr, len);
  200                 return;
  201         }
  202         textleaf = (struct csrtext *)(reg + reg->val);
  203 
  204         if ((vm_offset_t)textleaf + textleaf->crc_len > CROM_END(cc)) {
  205                 strncpy(buf, nullstr, len);
  206                 return;
  207         }
  208 
  209         /* XXX should check spec and type */
  210 
  211         bp = (uint32_t *)&buf[0];
  212         qlen = textleaf->crc_len - 2;
  213         if (len < qlen * 4)
  214                 qlen = len/4;
  215         for (i = 0; i < qlen; i++)
  216                 *bp++ = ntohl(textleaf->text[i]);
  217         /* make sure to terminate the string */
  218         if (len <= qlen * 4)
  219                 buf[len - 1] = 0;
  220         else
  221                 buf[qlen * 4] = 0;
  222 }
  223 
  224 uint16_t
  225 crom_crc(uint32_t *ptr, int len)
  226 {
  227         int i, shift;
  228         uint32_t data, sum, crc = 0;
  229 
  230         for (i = 0; i < len; i++) {
  231                 data = ptr[i];
  232                 for (shift = 28; shift >= 0; shift -= 4) {
  233                         sum = ((crc >> 12) ^ (data >> shift)) & 0xf;
  234                         crc = (crc << 4) ^ (sum << 12) ^ (sum << 5) ^ sum;
  235                 }
  236                 crc &= 0xffff;
  237         }
  238         return ((uint16_t) crc);
  239 }
  240 
  241 #if !defined(_KERNEL) && !defined(_BOOT)
  242 static void
  243 crom_desc_specver(uint32_t spec, uint32_t ver, char *buf, int len)
  244 {
  245         char *s = NULL;
  246 
  247         if (spec == CSRVAL_ANSIT10 || spec == 0) {
  248                 switch (ver) {
  249                 case CSRVAL_T10SBP2:
  250                         s = "SBP-2";
  251                         break;
  252                 default:
  253                         if (spec != 0)
  254                                 s = "unknown ANSIT10";
  255                 }
  256         }
  257         if (spec == CSRVAL_1394TA || spec == 0) {
  258                 switch (ver) {
  259                 case CSR_PROTAVC:
  260                         s = "AV/C";
  261                         break;
  262                 case CSR_PROTCAL:
  263                         s = "CAL";
  264                         break;
  265                 case CSR_PROTEHS:
  266                         s = "EHS";
  267                         break;
  268                 case CSR_PROTHAVI:
  269                         s = "HAVi";
  270                         break;
  271                 case CSR_PROTCAM104:
  272                         s = "1394 Cam 1.04";
  273                         break;
  274                 case CSR_PROTCAM120:
  275                         s = "1394 Cam 1.20";
  276                         break;
  277                 case CSR_PROTCAM130:
  278                         s = "1394 Cam 1.30";
  279                         break;
  280                 case CSR_PROTDPP:
  281                         s = "1394 Direct print";
  282                         break;
  283                 case CSR_PROTIICP:
  284                         s = "Industrial & Instrument";
  285                         break;
  286                 default:
  287                         if (spec != 0)
  288                                 s = "unknown 1394TA";
  289                 }
  290         }
  291         if (s != NULL)
  292                 snprintf(buf, len, "%s", s);
  293 }
  294 
  295 char *
  296 crom_desc(struct crom_context *cc, char *buf, int len)
  297 {
  298         struct csrreg *reg;
  299         struct csrdirectory *dir;
  300         char *desc;
  301         uint16_t crc;
  302 
  303         reg = crom_get(cc);
  304         switch (reg->key & CSRTYPE_MASK) {
  305         case CSRTYPE_I:
  306 #if 0
  307                 len -= snprintf(buf, len, "%d", reg->val);
  308                 buf += strlen(buf);
  309 #else
  310                 *buf = '\0';
  311 #endif
  312                 break;
  313         case CSRTYPE_C:
  314                 len -= snprintf(buf, len, "offset=0x%04x(%d)",
  315                     reg->val, reg->val);
  316                 buf += strlen(buf);
  317                 break;
  318         case CSRTYPE_L:
  319                 /* XXX fall through */
  320         case CSRTYPE_D:
  321                 dir = (struct csrdirectory *)(reg + reg->val);
  322                 crc = crom_crc((uint32_t *)&dir->entry[0], dir->crc_len);
  323                 len -= snprintf(buf, len, "len=%d crc=0x%04x(%s) ",
  324                     dir->crc_len, dir->crc,
  325                     (crc == dir->crc) ? "OK" : "NG");
  326                 buf += strlen(buf);
  327         }
  328         switch (reg->key) {
  329         case 0x03:
  330                 desc = "module_vendor_ID";
  331                 break;
  332         case 0x04:
  333                 desc = "hardware_version";
  334                 break;
  335         case 0x0c:
  336                 desc = "node_capabilities";
  337                 break;
  338         case 0x12:
  339                 desc = "unit_spec_ID";
  340                 break;
  341         case 0x13:
  342                 desc = "unit_sw_version";
  343                 crom_desc_specver(0, reg->val, buf, len);
  344                 break;
  345         case 0x14:
  346                 desc = "logical_unit_number";
  347                 break;
  348         case 0x17:
  349                 desc = "model_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 0x54:
  370                 desc = "management_agent";
  371                 break;
  372         case 0x81:
  373                 desc = "text_leaf";
  374                 crom_parse_text(cc, buf + strlen(buf), len);
  375                 break;
  376         case 0xd1:
  377                 desc = "unit_directory";
  378                 break;
  379         case 0xd4:
  380                 desc = "logical_unit_directory";
  381                 break;
  382         default:
  383                 desc = "unknown";
  384         }
  385         return desc;
  386 }
  387 #endif
  388 
  389 #if defined(_KERNEL) || defined(_BOOT) || defined(TEST)
  390 
  391 int
  392 crom_add_quad(struct crom_chunk *chunk, uint32_t entry)
  393 {
  394         int index;
  395 
  396         index = chunk->data.crc_len;
  397         if (index >= CROM_MAX_CHUNK_LEN - 1) {
  398                 printf("too large chunk %d\n", index);
  399                 return (-1);
  400         }
  401         chunk->data.buf[index] = entry;
  402         chunk->data.crc_len++;
  403         return (index);
  404 }
  405 
  406 int
  407 crom_add_entry(struct crom_chunk *chunk, int key, int val)
  408 {
  409         union
  410         {
  411                 struct csrreg reg;
  412                 uint32_t i;
  413         } foo;
  414 
  415         foo.reg.key = key;
  416         foo.reg.val = val;
  417         return (crom_add_quad(chunk, foo.i));
  418 }
  419 
  420 int
  421 crom_add_chunk(struct crom_src *src, struct crom_chunk *parent,
  422     struct crom_chunk *child, int key)
  423 {
  424         int index;
  425 
  426         if (parent == NULL) {
  427                 STAILQ_INSERT_TAIL(&src->chunk_list, child, link);
  428                 return (0);
  429         }
  430 
  431         index = crom_add_entry(parent, key, 0);
  432         if (index < 0) {
  433                 return (-1);
  434         }
  435         child->ref_chunk = parent;
  436         child->ref_index = index;
  437         STAILQ_INSERT_TAIL(&src->chunk_list, child, link);
  438         return (index);
  439 }
  440 
  441 #define MAX_TEXT ((CROM_MAX_CHUNK_LEN + 1) * 4 - sizeof(struct csrtext))
  442 int
  443 crom_add_simple_text(struct crom_src *src, struct crom_chunk *parent,
  444     struct crom_chunk *chunk, char *buf)
  445 {
  446         struct csrtext *tl;
  447         uint32_t *p;
  448         int len, i;
  449         char t[MAX_TEXT];
  450 
  451         len = strlen(buf);
  452         if (len > MAX_TEXT) {
  453                 printf("text(%d) truncated to %td.\n", len, MAX_TEXT);
  454                 len = MAX_TEXT;
  455         }
  456 
  457         tl = (struct csrtext *) &chunk->data;
  458         tl->crc_len = howmany(sizeof(struct csrtext) + len, sizeof(uint32_t));
  459         tl->spec_id = 0;
  460         tl->spec_type = 0;
  461         tl->lang_id = 0;
  462         bzero(&t[0], roundup2(len, sizeof(uint32_t)));
  463         bcopy(buf, &t[0], len);
  464         p = (uint32_t *)&t[0];
  465         for (i = 0; i < howmany(len, sizeof(uint32_t)); i++)
  466                 tl->text[i] = ntohl(*p++);
  467         return (crom_add_chunk(src, parent, chunk, CROM_TEXTLEAF));
  468 }
  469 
  470 static int
  471 crom_copy(uint32_t *src, uint32_t *dst, int *offset, int len, int maxlen)
  472 {
  473         if (*offset + len > maxlen) {
  474                 printf("Config. ROM is too large for the buffer\n");
  475                 return (-1);
  476         }
  477         bcopy(src, (char *)(dst + *offset), len * sizeof(uint32_t));
  478         *offset += len;
  479         return (0);
  480 }
  481 
  482 int
  483 crom_load(struct crom_src *src, uint32_t *buf, int maxlen)
  484 {
  485         struct crom_chunk *chunk, *parent;
  486         struct csrhdr *hdr;
  487 #if defined(_KERNEL) || defined(_BOOT)
  488         uint32_t *ptr;
  489         int i;
  490 #endif
  491         int count, offset;
  492         int len;
  493 
  494         offset = 0;
  495         /* Determine offset */
  496         STAILQ_FOREACH(chunk, &src->chunk_list, link) {
  497                 chunk->offset = offset;
  498                 /* Assume the offset of the parent is already known */
  499                 parent = chunk->ref_chunk;
  500                 if (parent != NULL) {
  501                         struct csrreg *reg;
  502                         reg = (struct csrreg *)
  503                             &parent->data.buf[chunk->ref_index];
  504                         reg->val = offset -
  505                             (parent->offset + 1 + chunk->ref_index);
  506                 }
  507                 offset += 1 + chunk->data.crc_len;
  508         }
  509 
  510         /* Calculate CRC and dump to the buffer */
  511         len = 1 + src->hdr.info_len;
  512         count = 0;
  513         if (crom_copy((uint32_t *)&src->hdr, buf, &count, len, maxlen) < 0)
  514                 return (-1);
  515         STAILQ_FOREACH(chunk, &src->chunk_list, link) {
  516                 chunk->data.crc =
  517                     crom_crc(&chunk->data.buf[0], chunk->data.crc_len);
  518 
  519                 len = 1 + chunk->data.crc_len;
  520                 if (crom_copy((uint32_t *)&chunk->data, buf,
  521                     &count, len, maxlen) < 0)
  522                         return (-1);
  523         }
  524         hdr = (struct csrhdr *)buf;
  525         hdr->crc_len = count - 1;
  526         hdr->crc = crom_crc(&buf[1], hdr->crc_len);
  527 
  528 #if defined(_KERNEL) || defined(_BOOT)
  529         /* byte swap */
  530         ptr = buf;
  531         for (i = 0; i < count; i++) {
  532                 *ptr = htonl(*ptr);
  533                 ptr++;
  534         }
  535 #endif
  536 
  537         return (count);
  538 }
  539 #endif
  540 
  541 #ifdef TEST
  542 int
  543 main()
  544 {
  545         struct crom_src src;
  546         struct crom_chunk root,unit1,unit2,unit3;
  547         struct crom_chunk text1,text2,text3,text4,text5,text6,text7;
  548         uint32_t buf[256], *p;
  549         int i;
  550 
  551         bzero(&src, sizeof(src));
  552         bzero(&root, sizeof(root));
  553         bzero(&unit1, sizeof(unit1));
  554         bzero(&unit2, sizeof(unit2));
  555         bzero(&unit3, sizeof(unit3));
  556         bzero(&text1, sizeof(text1));
  557         bzero(&text2, sizeof(text2));
  558         bzero(&text3, sizeof(text3));
  559         bzero(&text3, sizeof(text4));
  560         bzero(&text3, sizeof(text5));
  561         bzero(&text3, sizeof(text6));
  562         bzero(&text3, sizeof(text7));
  563         bzero(buf, 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, &text1, "FreeBSD");
  589         crom_add_entry(&root, CSRKEY_HW, __FreeBSD_version);
  590         crom_add_simple_text(&src, &root, &text2, "FreeBSD-5");
  591 
  592         /* SBP unit directory */
  593         crom_add_chunk(&src, &root, &unit1, CROM_UDIR);
  594         crom_add_entry(&unit1, CSRKEY_SPEC, CSRVAL_ANSIT10);
  595         crom_add_entry(&unit1, CSRKEY_VER, CSRVAL_T10SBP2);
  596         crom_add_entry(&unit1, CSRKEY_COM_SPEC, CSRVAL_ANSIT10);
  597         crom_add_entry(&unit1, CSRKEY_COM_SET, CSRVAL_SCSI);
  598         /* management_agent */
  599         crom_add_entry(&unit1, CROM_MGM, 0x1000);
  600         crom_add_entry(&unit1, CSRKEY_UNIT_CH, (10<<8) | 8);
  601         /* Device type and LUN */
  602         crom_add_entry(&unit1, CROM_LUN, 0);
  603         crom_add_entry(&unit1, CSRKEY_MODEL, 1);
  604         crom_add_simple_text(&src, &unit1, &text3, "scsi_target");
  605 
  606         /* RFC2734 IPv4 over IEEE1394 */
  607         crom_add_chunk(&src, &root, &unit2, CROM_UDIR);
  608         crom_add_entry(&unit2, CSRKEY_SPEC, CSRVAL_IETF);
  609         crom_add_simple_text(&src, &unit2, &text4, "IANA");
  610         crom_add_entry(&unit2, CSRKEY_VER, 1);
  611         crom_add_simple_text(&src, &unit2, &text5, "IPv4");
  612 
  613         /* RFC3146 IPv6 over IEEE1394 */
  614         crom_add_chunk(&src, &root, &unit3, CROM_UDIR);
  615         crom_add_entry(&unit3, CSRKEY_SPEC, CSRVAL_IETF);
  616         crom_add_simple_text(&src, &unit3, &text6, "IANA");
  617         crom_add_entry(&unit3, CSRKEY_VER, 2);
  618         crom_add_simple_text(&src, &unit3, &text7, "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/firewire/fwcrom.c

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