drivers/s390/block/dasd_3370_erp.c

   1 /*
   2  * File...........: linux/drivers/s390/block/dasd_3370_erp.c
   3  * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
   4  * Bugreports.to..: <Linux390@de.ibm.com>
   5  * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 2000
   6  *
   7  */
   8
   9 #define PRINTK_HEADER "dasd_erp(3370)"
  10
  11 #include "dasd_int.h"
  12
  13
  14 /*
  15  * DASD_3370_ERP_EXAMINE
  16  *
  17  * DESCRIPTION
  18  *   Checks only for fatal/no/recover error.
  19  *   A detailed examination of the sense data is done later outside
  20  *   the interrupt handler.
  21  *
  22  *   The logic is based on the 'IBM 3880 Storage Control Reference' manual
  23  *   'Chapter 7. 3370 Sense Data'.
  24  *
  25  * RETURN VALUES
  26  *   dasd_era_none      no error
  27  *   dasd_era_fatal     for all fatal (unrecoverable errors)
  28  *   dasd_era_recover   for all others.
  29  */
  30 dasd_era_t
  31 dasd_3370_erp_examine(struct dasd_ccw_req * cqr, struct irb * irb)
  32 {
  33         char *sense = irb->ecw;
  34
  35         /* check for successful execution first */
  36         if (irb->scsw.cstat == 0x00 &&
  37             irb->scsw.dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END))
  38                 return dasd_era_none;
  39         if (sense[0] & 0x80) {  /* CMD reject */
  40                 return dasd_era_fatal;
  41         }
  42         if (sense[0] & 0x40) {  /* Drive offline */
  43                 return dasd_era_recover;
  44         }
  45         if (sense[0] & 0x20) {  /* Bus out parity */
  46                 return dasd_era_recover;
  47         }
  48         if (sense[0] & 0x10) {  /* equipment check */
  49                 if (sense[1] & 0x80) {
  50                         return dasd_era_fatal;
  51                 }
  52                 return dasd_era_recover;
  53         }
  54         if (sense[0] & 0x08) {  /* data check */
  55                 if (sense[1] & 0x80) {
  56                         return dasd_era_fatal;
  57                 }
  58                 return dasd_era_recover;
  59         }
  60         if (sense[0] & 0x04) {  /* overrun */
  61                 if (sense[1] & 0x80) {
  62                         return dasd_era_fatal;
  63                 }
  64                 return dasd_era_recover;
  65         }
  66         if (sense[1] & 0x40) {  /* invalid blocksize */
  67                 return dasd_era_fatal;
  68         }
  69         if (sense[1] & 0x04) {  /* file protected */
  70                 return dasd_era_recover;
  71         }
  72         if (sense[1] & 0x01) {  /* operation incomplete */
  73                 return dasd_era_recover;
  74         }
  75         if (sense[2] & 0x80) {  /* check data erroor */
  76                 return dasd_era_recover;
  77         }
  78         if (sense[2] & 0x10) {  /* Env. data present */
  79                 return dasd_era_recover;
  80         }
  81         /* examine the 24 byte sense data */
  82         return dasd_era_recover;
  83
  84 }                               /* END dasd_3370_erp_examine */