release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/scsi/bfa/plog.c

   1 /*
   2  * Copyright (c) 2005-2009 Brocade Communications Systems, Inc.
   3  * All rights reserved
   4  * www.brocade.com
   5  *
   6  * Linux driver for Brocade Fibre Channel Host Bus Adapter.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License (GPL) Version 2 as
  10  * published by the Free Software Foundation
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  */
  17
  18 #include <bfa_os_inc.h>
  19 #include <cs/bfa_plog.h>
  20 #include <cs/bfa_debug.h>
  21
  22 static int
  23 plkd_validate_logrec(struct bfa_plog_rec_s *pl_rec)
  24 {
  25         if ((pl_rec->log_type != BFA_PL_LOG_TYPE_INT)
  26             && (pl_rec->log_type != BFA_PL_LOG_TYPE_STRING))
  27                 return 1;
  28
  29         if ((pl_rec->log_type != BFA_PL_LOG_TYPE_INT)
  30             && (pl_rec->log_num_ints > BFA_PL_INT_LOG_SZ))
  31                 return 1;
  32
  33         return 0;
  34 }
  35
  36 static void
  37 bfa_plog_add(struct bfa_plog_s *plog, struct bfa_plog_rec_s *pl_rec)
  38 {
  39         u16        tail;
  40         struct bfa_plog_rec_s *pl_recp;
  41
  42         if (plog->plog_enabled == 0)
  43                 return;
  44
  45         if (plkd_validate_logrec(pl_rec)) {
  46                 bfa_assert(0);
  47                 return;
  48         }
  49
  50         tail = plog->tail;
  51
  52         pl_recp = &(plog->plog_recs[tail]);
  53
  54         bfa_os_memcpy(pl_recp, pl_rec, sizeof(struct bfa_plog_rec_s));
  55
  56         pl_recp->tv = BFA_TRC_TS(plog);
  57         BFA_PL_LOG_REC_INCR(plog->tail);
  58
  59         if (plog->head == plog->tail)
  60                 BFA_PL_LOG_REC_INCR(plog->head);
  61 }
  62
  63 void
  64 bfa_plog_init(struct bfa_plog_s *plog)
  65 {
  66         bfa_os_memset((char *)plog, 0, sizeof(struct bfa_plog_s));
  67
  68         bfa_os_memcpy(plog->plog_sig, BFA_PL_SIG_STR, BFA_PL_SIG_LEN);
  69         plog->head = plog->tail = 0;
  70         plog->plog_enabled = 1;
  71 }
  72
  73 void
  74 bfa_plog_str(struct bfa_plog_s *plog, enum bfa_plog_mid mid,
  75                 enum bfa_plog_eid event,
  76                 u16 misc, char *log_str)
  77 {
  78         struct bfa_plog_rec_s  lp;
  79
  80         if (plog->plog_enabled) {
  81                 bfa_os_memset(&lp, 0, sizeof(struct bfa_plog_rec_s));
  82                 lp.mid = mid;
  83                 lp.eid = event;
  84                 lp.log_type = BFA_PL_LOG_TYPE_STRING;
  85                 lp.misc = misc;
  86                 strncpy(lp.log_entry.string_log, log_str,
  87                         BFA_PL_STRING_LOG_SZ - 1);
  88                 lp.log_entry.string_log[BFA_PL_STRING_LOG_SZ - 1] = '\0';
  89                 bfa_plog_add(plog, &lp);
  90         }
  91 }
  92
  93 void
  94 bfa_plog_intarr(struct bfa_plog_s *plog, enum bfa_plog_mid mid,
  95                 enum bfa_plog_eid event,
  96                 u16 misc, u32 *intarr, u32 num_ints)
  97 {
  98         struct bfa_plog_rec_s  lp;
  99         u32        i;
 100
 101         if (num_ints > BFA_PL_INT_LOG_SZ)
 102                 num_ints = BFA_PL_INT_LOG_SZ;
 103
 104         if (plog->plog_enabled) {
 105                 bfa_os_memset(&lp, 0, sizeof(struct bfa_plog_rec_s));
 106                 lp.mid = mid;
 107                 lp.eid = event;
 108                 lp.log_type = BFA_PL_LOG_TYPE_INT;
 109                 lp.misc = misc;
 110
 111                 for (i = 0; i < num_ints; i++)
 112                         bfa_os_assign(lp.log_entry.int_log[i],
 113                                         intarr[i]);
 114
 115                 lp.log_num_ints = (u8) num_ints;
 116
 117                 bfa_plog_add(plog, &lp);
 118         }
 119 }
 120
 121 void
 122 bfa_plog_fchdr(struct bfa_plog_s *plog, enum bfa_plog_mid mid,
 123                         enum bfa_plog_eid event,
 124                         u16 misc, struct fchs_s *fchdr)
 125 {
 126         struct bfa_plog_rec_s  lp;
 127         u32       *tmp_int = (u32 *) fchdr;
 128         u32        ints[BFA_PL_INT_LOG_SZ];
 129
 130         if (plog->plog_enabled) {
 131                 bfa_os_memset(&lp, 0, sizeof(struct bfa_plog_rec_s));
 132
 133                 ints[0] = tmp_int[0];
 134                 ints[1] = tmp_int[1];
 135                 ints[2] = tmp_int[4];
 136
 137                 bfa_plog_intarr(plog, mid, event, misc, ints, 3);
 138         }
 139 }
 140
 141 void
 142 bfa_plog_fchdr_and_pl(struct bfa_plog_s *plog, enum bfa_plog_mid mid,
 143                       enum bfa_plog_eid event, u16 misc, struct fchs_s *fchdr,
 144                       u32 pld_w0)
 145 {
 146         struct bfa_plog_rec_s  lp;
 147         u32       *tmp_int = (u32 *) fchdr;
 148         u32        ints[BFA_PL_INT_LOG_SZ];
 149
 150         if (plog->plog_enabled) {
 151                 bfa_os_memset(&lp, 0, sizeof(struct bfa_plog_rec_s));
 152
 153                 ints[0] = tmp_int[0];
 154                 ints[1] = tmp_int[1];
 155                 ints[2] = tmp_int[4];
 156                 ints[3] = pld_w0;
 157
 158                 bfa_plog_intarr(plog, mid, event, misc, ints, 4);
 159         }
 160 }
 161
 162 void
 163 bfa_plog_clear(struct bfa_plog_s *plog)
 164 {
 165         plog->head = plog->tail = 0;
 166 }
 167
 168 void
 169 bfa_plog_enable(struct bfa_plog_s *plog)
 170 {
 171         plog->plog_enabled = 1;
 172 }
 173
 174 void
 175 bfa_plog_disable(struct bfa_plog_s *plog)
 176 {
 177         plog->plog_enabled = 0;
 178 }
 179
 180 bfa_boolean_t
 181 bfa_plog_get_setting(struct bfa_plog_s *plog)
 182 {
 183         return (bfa_boolean_t)plog->plog_enabled;
 184 }