drivers/fmc/fru-parse.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright (C) 2012 CERN (www.cern.ch)
   4  * Author: Alessandro Rubini <rubini@gnudd.com>
   5  *
   6  * This work is part of the White Rabbit project, a research effort led
   7  * by CERN, the European Institute for Nuclear Research.
   8  */
   9 #include <linux/ipmi-fru.h>
  10
  11 /* Some internal helpers */
  12 static struct fru_type_length *
  13 __fru_get_board_tl(struct fru_common_header *header, int nr)
  14 {
  15         struct fru_board_info_area *bia;
  16         struct fru_type_length *tl;
  17
  18         bia = fru_get_board_area(header);
  19         tl = bia->tl;
  20         while (nr > 0 && !fru_is_eof(tl)) {
  21                 tl = fru_next_tl(tl);
  22                 nr--;
  23         }
  24         if (fru_is_eof(tl))
  25                 return NULL;
  26         return tl;
  27 }
  28
  29 static char *__fru_alloc_get_tl(struct fru_common_header *header, int nr)
  30 {
  31         struct fru_type_length *tl;
  32         char *res;
  33
  34         tl = __fru_get_board_tl(header, nr);
  35         if (!tl)
  36                 return NULL;
  37
  38         res = fru_alloc(fru_strlen(tl) + 1);
  39         if (!res)
  40                 return NULL;
  41         return fru_strcpy(res, tl);
  42 }
  43
  44 /* Public checksum verifiers */
  45 int fru_header_cksum_ok(struct fru_common_header *header)
  46 {
  47         uint8_t *ptr = (void *)header;
  48         int i, sum;
  49
  50         for (i = sum = 0; i < sizeof(*header); i++)
  51                 sum += ptr[i];
  52         return (sum & 0xff) == 0;
  53 }
  54 int fru_bia_cksum_ok(struct fru_board_info_area *bia)
  55 {
  56         uint8_t *ptr = (void *)bia;
  57         int i, sum;
  58
  59         for (i = sum = 0; i < 8 * bia->area_len; i++)
  60                 sum += ptr[i];
  61         return (sum & 0xff) == 0;
  62 }
  63
  64 /* Get various stuff, trivial */
  65 char *fru_get_board_manufacturer(struct fru_common_header *header)
  66 {
  67         return __fru_alloc_get_tl(header, 0);
  68 }
  69 char *fru_get_product_name(struct fru_common_header *header)
  70 {
  71         return __fru_alloc_get_tl(header, 1);
  72 }
  73 char *fru_get_serial_number(struct fru_common_header *header)
  74 {
  75         return __fru_alloc_get_tl(header, 2);
  76 }
  77 char *fru_get_part_number(struct fru_common_header *header)
  78 {
  79         return __fru_alloc_get_tl(header, 3);
  80 }