drivers/fmc/fru-parse.c

   1 /*
   2  * Copyright (C) 2012 CERN (www.cern.ch)
   3  * Author: Alessandro Rubini <rubini@gnudd.com>
   4  *
   5  * Released according to the GNU GPL, version 2 or any later version.
   6  *
   7  * This work is part of the White Rabbit project, a research effort led
   8  * by CERN, the European Institute for Nuclear Research.
   9  */
  10 #include <linux/ipmi-fru.h>
  11
  12 /* Some internal helpers */
  13 static struct fru_type_length *
  14 __fru_get_board_tl(struct fru_common_header *header, int nr)
  15 {
  16         struct fru_board_info_area *bia;
  17         struct fru_type_length *tl;
  18
  19         bia = fru_get_board_area(header);
  20         tl = bia->tl;
  21         while (nr > 0 && !fru_is_eof(tl)) {
  22                 tl = fru_next_tl(tl);
  23                 nr--;
  24         }
  25         if (fru_is_eof(tl))
  26                 return NULL;
  27         return tl;
  28 }
  29
  30 static char *__fru_alloc_get_tl(struct fru_common_header *header, int nr)
  31 {
  32         struct fru_type_length *tl;
  33         char *res;
  34         int len;
  35
  36         tl = __fru_get_board_tl(header, nr);
  37         if (!tl)
  38                 return NULL;
  39         len = fru_strlen(tl);
  40         res = fru_alloc(fru_strlen(tl) + 1);
  41         if (!res)
  42                 return NULL;
  43         return fru_strcpy(res, tl);
  44 }
  45
  46 /* Public checksum verifiers */
  47 int fru_header_cksum_ok(struct fru_common_header *header)
  48 {
  49         uint8_t *ptr = (void *)header;
  50         int i, sum;
  51
  52         for (i = sum = 0; i < sizeof(*header); i++)
  53                 sum += ptr[i];
  54         return (sum & 0xff) == 0;
  55 }
  56 int fru_bia_cksum_ok(struct fru_board_info_area *bia)
  57 {
  58         uint8_t *ptr = (void *)bia;
  59         int i, sum;
  60
  61         for (i = sum = 0; i < 8 * bia->area_len; i++)
  62                 sum += ptr[i];
  63         return (sum & 0xff) == 0;
  64 }
  65
  66 /* Get various stuff, trivial */
  67 char *fru_get_board_manufacturer(struct fru_common_header *header)
  68 {
  69         return __fru_alloc_get_tl(header, 0);
  70 }
  71 char *fru_get_product_name(struct fru_common_header *header)
  72 {
  73         return __fru_alloc_get_tl(header, 1);
  74 }
  75 char *fru_get_serial_number(struct fru_common_header *header)
  76 {
  77         return __fru_alloc_get_tl(header, 2);
  78 }
  79 char *fru_get_part_number(struct fru_common_header *header)
  80 {
  81         return __fru_alloc_get_tl(header, 3);
  82 }