| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | * $Revision: 1.9 $ |
| 8 | */ |
| 9 | |
| 10 | #define PRINTK_HEADER "dasd_erp(3370)" |
| 11 | |
| 12 | #include "dasd_int.h" |
| 13 | |
| 14 | |
| 15 | /* |
| 16 | * DASD_3370_ERP_EXAMINE |
| 17 | * |
| 18 | * DESCRIPTION |
| 19 | * Checks only for fatal/no/recover error. |
| 20 | * A detailed examination of the sense data is done later outside |
| 21 | * the interrupt handler. |
| 22 | * |
| 23 | * The logic is based on the 'IBM 3880 Storage Control Reference' manual |
| 24 | * 'Chapter 7. 3370 Sense Data'. |
| 25 | * |
| 26 | * RETURN VALUES |
| 27 | * dasd_era_none no error |
| 28 | * dasd_era_fatal for all fatal (unrecoverable errors) |
| 29 | * dasd_era_recover for all others. |
| 30 | */ |
| 31 | dasd_era_t |
| 32 | dasd_3370_erp_examine(struct dasd_ccw_req * cqr, struct irb * irb) |
| 33 | { |
| 34 | char *sense = irb->ecw; |
| 35 | |
| 36 | /* check for successful execution first */ |
| 37 | if (irb->scsw.cstat == 0x00 && |
| 38 | irb->scsw.dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END)) |
| 39 | return dasd_era_none; |
| 40 | if (sense[0] & 0x80) { /* CMD reject */ |
| 41 | return dasd_era_fatal; |
| 42 | } |
| 43 | if (sense[0] & 0x40) { /* Drive offline */ |
| 44 | return dasd_era_recover; |
| 45 | } |
| 46 | if (sense[0] & 0x20) { /* Bus out parity */ |
| 47 | return dasd_era_recover; |
| 48 | } |
| 49 | if (sense[0] & 0x10) { /* equipment check */ |
| 50 | if (sense[1] & 0x80) { |
| 51 | return dasd_era_fatal; |
| 52 | } |
| 53 | return dasd_era_recover; |
| 54 | } |
| 55 | if (sense[0] & 0x08) { /* data check */ |
| 56 | if (sense[1] & 0x80) { |
| 57 | return dasd_era_fatal; |
| 58 | } |
| 59 | return dasd_era_recover; |
| 60 | } |
| 61 | if (sense[0] & 0x04) { /* overrun */ |
| 62 | if (sense[1] & 0x80) { |
| 63 | return dasd_era_fatal; |
| 64 | } |
| 65 | return dasd_era_recover; |
| 66 | } |
| 67 | if (sense[1] & 0x40) { /* invalid blocksize */ |
| 68 | return dasd_era_fatal; |
| 69 | } |
| 70 | if (sense[1] & 0x04) { /* file protected */ |
| 71 | return dasd_era_recover; |
| 72 | } |
| 73 | if (sense[1] & 0x01) { /* operation incomplete */ |
| 74 | return dasd_era_recover; |
| 75 | } |
| 76 | if (sense[2] & 0x80) { /* check data erroor */ |
| 77 | return dasd_era_recover; |
| 78 | } |
| 79 | if (sense[2] & 0x10) { /* Env. data present */ |
| 80 | return dasd_era_recover; |
| 81 | } |
| 82 | /* examine the 24 byte sense data */ |
| 83 | return dasd_era_recover; |
| 84 | |
| 85 | } /* END dasd_3370_erp_examine */ |
| 86 | |
| 87 | /* |
| 88 | * Overrides for Emacs so that we follow Linus's tabbing style. |
| 89 | * Emacs will notice this stuff at the end of the file and automatically |
| 90 | * adjust the settings for this buffer only. This must remain at the end |
| 91 | * of the file. |
| 92 | * --------------------------------------------------------------------------- |
| 93 | * Local variables: |
| 94 | * c-indent-level: 4 |
| 95 | * c-brace-imaginary-offset: 0 |
| 96 | * c-brace-offset: -4 |
| 97 | * c-argdecl-indent: 4 |
| 98 | * c-label-offset: -4 |
| 99 | * c-continued-statement-offset: 4 |
| 100 | * c-continued-brace-offset: 0 |
| 101 | * indent-tabs-mode: 1 |
| 102 | * tab-width: 8 |
| 103 | * End: |
| 104 | */ |