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Linux kernel mirror (for testing)
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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 */
30dasd_era_t
31dasd_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 */
85
86/*
87 * Overrides for Emacs so that we follow Linus's tabbing style.
88 * Emacs will notice this stuff at the end of the file and automatically
89 * adjust the settings for this buffer only. This must remain at the end
90 * of the file.
91 * ---------------------------------------------------------------------------
92 * Local variables:
93 * c-indent-level: 4
94 * c-brace-imaginary-offset: 0
95 * c-brace-offset: -4
96 * c-argdecl-indent: 4
97 * c-label-offset: -4
98 * c-continued-statement-offset: 4
99 * c-continued-brace-offset: 0
100 * indent-tabs-mode: 1
101 * tab-width: 8
102 * End:
103 */