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
  35         tl = __fru_get_board_tl(header, nr);
  36         if (!tl)
  37                 return NULL;
  38
  39         res = fru_alloc(fru_strlen(tl) + 1);
  40         if (!res)
  41                 return NULL;
  42         return fru_strcpy(res, tl);
  43 }
  44
  45 /* Public checksum verifiers */
  46 int fru_header_cksum_ok(struct fru_common_header *header)
  47 {
  48         uint8_t *ptr = (void *)header;
  49         int i, sum;
  50
  51         for (i = sum = 0; i < sizeof(*header); i++)
  52                 sum += ptr[i];
  53         return (sum & 0xff) == 0;
  54 }
  55 int fru_bia_cksum_ok(struct fru_board_info_area *bia)
  56 {
  57         uint8_t *ptr = (void *)bia;
  58         int i, sum;
  59
  60         for (i = sum = 0; i < 8 * bia->area_len; i++)
  61                 sum += ptr[i];
  62         return (sum & 0xff) == 0;
  63 }
  64
  65 /* Get various stuff, trivial */
  66 char *fru_get_board_manufacturer(struct fru_common_header *header)
  67 {
  68         return __fru_alloc_get_tl(header, 0);
  69 }
  70 char *fru_get_product_name(struct fru_common_header *header)
  71 {
  72         return __fru_alloc_get_tl(header, 1);
  73 }
  74 char *fru_get_serial_number(struct fru_common_header *header)
  75 {
  76         return __fru_alloc_get_tl(header, 2);
  77 }
  78 char *fru_get_part_number(struct fru_common_header *header)
  79 {
  80         return __fru_alloc_get_tl(header, 3);
  81 }