ls-vpd.c

   1 /*
   2  *      The PCI Utilities -- Show Vital Product Data
   3  *
   4  *      Copyright (c) 2008 Solarflare Communications
   5  *
   6  *      Written by Ben Hutchings <bhutchings@solarflare.com>
   7  *      Improved by Martin Mares <mj@ucw.cz>
   8  *
   9  *      Can be freely distributed and used under the terms of the GNU GPL.
  10  */
  11
  12 #include <stdio.h>
  13
  14 #include "lspci.h"
  15
  16 /*
  17  *  The list of all known VPD items and their formats.
  18  *  Technically, this belongs to the pci.ids file, but the VPD does not seem
  19  *  to be developed any longer, so we have chosen the easier way.
  20  */
  21
  22 enum vpd_format {
  23   F_BINARY,
  24   F_TEXT,
  25   F_RESVD,
  26   F_RDWR,
  27 };
  28
  29 static const struct vpd_item {
  30   byte id1, id2;
  31   byte format;
  32   const char *name;
  33 } vpd_items[] = {
  34   { 'C','P', F_BINARY,  "Extended capability" },
  35   { 'E','C', F_TEXT,    "Engineering changes" },
  36   { 'M','N', F_TEXT,    "Manufacture ID" },
  37   { 'P','N', F_TEXT,    "Part number" },
  38   { 'R','V', F_RESVD,   "Reserved" },
  39   { 'R','W', F_RDWR,    "Read-write area" },
  40   { 'S','N', F_TEXT,    "Serial number" },
  41   { 'Y','A', F_TEXT,    "Asset tag" },
  42   { 'V', 0 , F_TEXT,    "Vendor specific" },
  43   { 'Y', 0 , F_TEXT,    "System specific" },
  44   /* Non-standard extensions */
  45   { 'C','C', F_TEXT,    "CCIN" },
  46   { 'F','C', F_TEXT,    "Feature code" },
  47   { 'F','N', F_TEXT,    "FRU" },
  48   { 'N','A', F_TEXT,    "Network address" },
  49   { 'R','M', F_TEXT,    "Firmware version" },
  50   { 'Z', 0 , F_TEXT,    "Product specific" },
  51   {  0,  0 , F_BINARY,  "Unknown" }
  52 };
  53
  54 static void
  55 print_vpd_string(const byte *buf, word len)
  56 {
  57   while (len--)
  58     {
  59       byte ch = *buf++;
  60       if (ch == '\\')
  61         printf("\\\\");
  62       else if (!ch && !len)
  63         ;  /* Cards with null-terminated strings have been observed */
  64       else if (ch < 32 || ch == 127)
  65         printf("\\x%02x", ch);
  66       else
  67         putchar(ch);
  68     }
  69 }
  70
  71 static void
  72 print_vpd_binary(const byte *buf, word len)
  73 {
  74   int i;
  75   for (i = 0; i < len; i++)
  76     {
  77       if (i)
  78         putchar(' ');
  79       printf("%02x", buf[i]);
  80     }
  81 }
  82
  83 static int
  84 read_vpd(struct device *d, int pos, byte *buf, int len, byte *csum)
  85 {
  86   if (!pci_read_vpd(d->dev, pos, buf, len))
  87     return 0;
  88   while (len--)
  89     *csum += *buf++;
  90   return 1;
  91 }
  92
  93 void
  94 cap_vpd(struct device *d)
  95 {
  96   word res_addr = 0, res_len, part_pos, part_len;
  97   byte buf[256];
  98   byte tag;
  99   byte csum = 0;
 100
 101   printf("Vital Product Data\n");
 102   if (verbose < 2)
 103     return;
 104
 105   while (res_addr <= PCI_VPD_ADDR_MASK)
 106     {
 107       if (!read_vpd(d, res_addr, &tag, 1, &csum))
 108         break;
 109       if (tag & 0x80)
 110         {
 111           if (res_addr > PCI_VPD_ADDR_MASK + 1 - 3)
 112             break;
 113           if (!read_vpd(d, res_addr + 1, buf, 2, &csum))
 114             break;
 115           res_len = buf[0] + (buf[1] << 8);
 116           res_addr += 3;
 117         }
 118       else
 119         {
 120           res_len = tag & 7;
 121           tag >>= 3;
 122           res_addr += 1;
 123         }
 124       if (res_len > PCI_VPD_ADDR_MASK + 1 - res_addr)
 125         break;
 126
 127       part_pos = 0;
 128
 129       switch (tag)
 130         {
 131         case 0x0f:
 132           printf("\t\tEnd\n");
 133           return;
 134
 135         case 0x82:
 136           printf("\t\tProduct Name: ");
 137           while (part_pos < res_len)
 138             {
 139               part_len = res_len - part_pos;
 140               if (part_len > sizeof(buf))
 141                 part_len = sizeof(buf);
 142               if (!read_vpd(d, res_addr + part_pos, buf, part_len, &csum))
 143                 break;
 144               print_vpd_string(buf, part_len);
 145               part_pos += part_len;
 146             }
 147           printf("\n");
 148           break;
 149
 150         case 0x90:
 151         case 0x91:
 152           printf("\t\t%s fields:\n",
 153                  (tag == 0x90) ? "Read-only" : "Read/write");
 154
 155           while (part_pos + 3 <= res_len)
 156             {
 157               word read_len;
 158               const struct vpd_item *item;
 159               byte id1, id2;
 160
 161               if (!read_vpd(d, res_addr + part_pos, buf, 3, &csum))
 162                 break;
 163               part_pos += 3;
 164               id1 = buf[0];
 165               id2 = buf[1];
 166               part_len = buf[2];
 167               if (part_len > res_len - part_pos)
 168                 break;
 169
 170               /* Is this item known? */
 171               for (item=vpd_items; item->id1 && item->id1 != id1 ||
 172                                    item->id2 && item->id2 != id2; item++)
 173                 ;
 174
 175               /* Only read the first byte of the RV field because the
 176                * remaining bytes are not included in the checksum. */
 177               read_len = (item->format == F_RESVD) ? 1 : part_len;
 178               if (!read_vpd(d, res_addr + part_pos, buf, read_len, &csum))
 179                 break;
 180
 181               printf("\t\t\t[%c%c] %s: ", id1, id2, item->name);
 182
 183               switch (item->format)
 184                 {
 185                 case F_TEXT:
 186                   print_vpd_string(buf, part_len);
 187                   printf("\n");
 188                   break;
 189                 case F_BINARY:
 190                   print_vpd_binary(buf, part_len);
 191                   printf("\n");
 192                   break;
 193                 case F_RESVD:
 194                   printf("checksum %s, %d byte(s) reserved\n", csum ? "bad" : "good", part_len - 1);
 195                   break;
 196                 case F_RDWR:
 197                   printf("%d byte(s) free\n", part_len);
 198                   break;
 199                 }
 200
 201               part_pos += part_len;
 202             }
 203           break;
 204
 205         default:
 206           printf("\t\tUnknown %s resource type %02x, will not decode more.\n",
 207                  (tag & 0x80) ? "large" : "small", tag & ~0x80);
 208           return;
 209         }
 210
 211       res_addr += res_len;
 212     }
 213
 214   if (res_addr == 0)
 215     printf("\t\tNot readable\n");
 216   else
 217     printf("\t\tNo end tag found\n");
 218 }