Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> |
3 | * Horst Hummel <Horst.Hummel@de.ibm.com> | |
4 | * Carsten Otte <Cotte@de.ibm.com> | |
5 | * Martin Schwidefsky <schwidefsky@de.ibm.com> | |
6 | * Bugreports.to..: <Linux390@de.ibm.com> | |
a53c8fab | 7 | * Copyright IBM Corp. 1999, 2001 |
1da177e4 | 8 | * |
1da177e4 LT |
9 | */ |
10 | ||
fc19f381 SH |
11 | #define KMSG_COMPONENT "dasd" |
12 | ||
1da177e4 LT |
13 | #include <linux/ctype.h> |
14 | #include <linux/init.h> | |
15 | ||
16 | #include <asm/debug.h> | |
17 | #include <asm/ebcdic.h> | |
18 | #include <asm/uaccess.h> | |
19 | ||
20 | /* This is ugly... */ | |
21 | #define PRINTK_HEADER "dasd_erp:" | |
22 | ||
23 | #include "dasd_int.h" | |
24 | ||
25 | struct dasd_ccw_req * | |
26 | dasd_alloc_erp_request(char *magic, int cplength, int datasize, | |
27 | struct dasd_device * device) | |
28 | { | |
29 | unsigned long flags; | |
30 | struct dasd_ccw_req *cqr; | |
31 | char *data; | |
32 | int size; | |
33 | ||
34 | /* Sanity checks */ | |
e048a8a6 ES |
35 | BUG_ON( magic == NULL || datasize > PAGE_SIZE || |
36 | (cplength*sizeof(struct ccw1)) > PAGE_SIZE); | |
1da177e4 LT |
37 | |
38 | size = (sizeof(struct dasd_ccw_req) + 7L) & -8L; | |
39 | if (cplength > 0) | |
40 | size += cplength * sizeof(struct ccw1); | |
41 | if (datasize > 0) | |
42 | size += datasize; | |
43 | spin_lock_irqsave(&device->mem_lock, flags); | |
44 | cqr = (struct dasd_ccw_req *) | |
45 | dasd_alloc_chunk(&device->erp_chunks, size); | |
46 | spin_unlock_irqrestore(&device->mem_lock, flags); | |
47 | if (cqr == NULL) | |
48 | return ERR_PTR(-ENOMEM); | |
49 | memset(cqr, 0, sizeof(struct dasd_ccw_req)); | |
8e09f215 SW |
50 | INIT_LIST_HEAD(&cqr->devlist); |
51 | INIT_LIST_HEAD(&cqr->blocklist); | |
1da177e4 LT |
52 | data = (char *) cqr + ((sizeof(struct dasd_ccw_req) + 7L) & -8L); |
53 | cqr->cpaddr = NULL; | |
54 | if (cplength > 0) { | |
55 | cqr->cpaddr = (struct ccw1 *) data; | |
56 | data += cplength*sizeof(struct ccw1); | |
57 | memset(cqr->cpaddr, 0, cplength*sizeof(struct ccw1)); | |
58 | } | |
59 | cqr->data = NULL; | |
60 | if (datasize > 0) { | |
61 | cqr->data = data; | |
62 | memset(cqr->data, 0, datasize); | |
63 | } | |
64 | strncpy((char *) &cqr->magic, magic, 4); | |
65 | ASCEBC((char *) &cqr->magic, 4); | |
66 | set_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); | |
67 | dasd_get_device(device); | |
68 | return cqr; | |
69 | } | |
70 | ||
71 | void | |
8e09f215 | 72 | dasd_free_erp_request(struct dasd_ccw_req *cqr, struct dasd_device * device) |
1da177e4 LT |
73 | { |
74 | unsigned long flags; | |
75 | ||
76 | spin_lock_irqsave(&device->mem_lock, flags); | |
77 | dasd_free_chunk(&device->erp_chunks, cqr); | |
78 | spin_unlock_irqrestore(&device->mem_lock, flags); | |
79 | atomic_dec(&device->ref_count); | |
80 | } | |
81 | ||
82 | ||
83 | /* | |
84 | * dasd_default_erp_action just retries the current cqr | |
85 | */ | |
86 | struct dasd_ccw_req * | |
8e09f215 | 87 | dasd_default_erp_action(struct dasd_ccw_req *cqr) |
1da177e4 LT |
88 | { |
89 | struct dasd_device *device; | |
90 | ||
8e09f215 | 91 | device = cqr->startdev; |
1da177e4 LT |
92 | |
93 | /* just retry - there is nothing to save ... I got no sense data.... */ | |
94 | if (cqr->retries > 0) { | |
fc19f381 | 95 | DBF_DEV_EVENT(DBF_DEBUG, device, |
1da177e4 LT |
96 | "default ERP called (%i retries left)", |
97 | cqr->retries); | |
a4d26c6a SW |
98 | if (!test_bit(DASD_CQR_VERIFY_PATH, &cqr->flags)) |
99 | cqr->lpm = device->path_data.opm; | |
8e09f215 | 100 | cqr->status = DASD_CQR_FILLED; |
1da177e4 | 101 | } else { |
ca99dab0 SH |
102 | pr_err("%s: default ERP has run out of retries and failed\n", |
103 | dev_name(&device->cdev->dev)); | |
1da177e4 | 104 | cqr->status = DASD_CQR_FAILED; |
1aae0560 | 105 | cqr->stopclk = get_tod_clock(); |
1da177e4 LT |
106 | } |
107 | return cqr; | |
108 | } /* end dasd_default_erp_action */ | |
109 | ||
110 | /* | |
111 | * DESCRIPTION | |
112 | * Frees all ERPs of the current ERP Chain and set the status | |
113 | * of the original CQR either to DASD_CQR_DONE if ERP was successful | |
114 | * or to DASD_CQR_FAILED if ERP was NOT successful. | |
115 | * NOTE: This function is only called if no discipline postaction | |
116 | * is available | |
117 | * | |
118 | * PARAMETER | |
119 | * erp current erp_head | |
120 | * | |
121 | * RETURN VALUES | |
122 | * cqr pointer to the original CQR | |
123 | */ | |
8e09f215 | 124 | struct dasd_ccw_req *dasd_default_erp_postaction(struct dasd_ccw_req *cqr) |
1da177e4 | 125 | { |
1da177e4 | 126 | int success; |
fbd70035 SW |
127 | unsigned long long startclk, stopclk; |
128 | struct dasd_device *startdev; | |
1da177e4 | 129 | |
e048a8a6 | 130 | BUG_ON(cqr->refers == NULL || cqr->function == NULL); |
1da177e4 | 131 | |
1da177e4 | 132 | success = cqr->status == DASD_CQR_DONE; |
fbd70035 SW |
133 | startclk = cqr->startclk; |
134 | stopclk = cqr->stopclk; | |
135 | startdev = cqr->startdev; | |
1da177e4 LT |
136 | |
137 | /* free all ERPs - but NOT the original cqr */ | |
138 | while (cqr->refers != NULL) { | |
139 | struct dasd_ccw_req *refers; | |
140 | ||
141 | refers = cqr->refers; | |
8e09f215 SW |
142 | /* remove the request from the block queue */ |
143 | list_del(&cqr->blocklist); | |
1da177e4 | 144 | /* free the finished erp request */ |
8e09f215 | 145 | dasd_free_erp_request(cqr, cqr->memdev); |
1da177e4 LT |
146 | cqr = refers; |
147 | } | |
148 | ||
149 | /* set corresponding status to original cqr */ | |
fbd70035 SW |
150 | cqr->startclk = startclk; |
151 | cqr->stopclk = stopclk; | |
152 | cqr->startdev = startdev; | |
1da177e4 LT |
153 | if (success) |
154 | cqr->status = DASD_CQR_DONE; | |
155 | else { | |
156 | cqr->status = DASD_CQR_FAILED; | |
1aae0560 | 157 | cqr->stopclk = get_tod_clock(); |
1da177e4 LT |
158 | } |
159 | ||
160 | return cqr; | |
161 | ||
162 | } /* end default_erp_postaction */ | |
163 | ||
1da177e4 LT |
164 | void |
165 | dasd_log_sense(struct dasd_ccw_req *cqr, struct irb *irb) | |
166 | { | |
167 | struct dasd_device *device; | |
168 | ||
8e09f215 | 169 | device = cqr->startdev; |
f6f80340 | 170 | if (cqr->intrc == -ETIMEDOUT) { |
0ea46b0e SW |
171 | dev_err(&device->cdev->dev, |
172 | "A timeout error occurred for cqr %p", cqr); | |
f6f80340 HR |
173 | return; |
174 | } | |
175 | if (cqr->intrc == -ENOLINK) { | |
0ea46b0e SW |
176 | dev_err(&device->cdev->dev, |
177 | "A transport error occurred for cqr %p", cqr); | |
f6f80340 HR |
178 | return; |
179 | } | |
1da177e4 LT |
180 | /* dump sense data */ |
181 | if (device->discipline && device->discipline->dump_sense) | |
182 | device->discipline->dump_sense(device, cqr, irb); | |
183 | } | |
184 | ||
fc19f381 SH |
185 | void |
186 | dasd_log_sense_dbf(struct dasd_ccw_req *cqr, struct irb *irb) | |
187 | { | |
188 | struct dasd_device *device; | |
189 | ||
190 | device = cqr->startdev; | |
191 | /* dump sense data to s390 debugfeature*/ | |
192 | if (device->discipline && device->discipline->dump_sense_dbf) | |
aeec92ca | 193 | device->discipline->dump_sense_dbf(device, irb, "log"); |
fc19f381 SH |
194 | } |
195 | EXPORT_SYMBOL(dasd_log_sense_dbf); | |
196 | ||
1da177e4 LT |
197 | EXPORT_SYMBOL(dasd_default_erp_action); |
198 | EXPORT_SYMBOL(dasd_default_erp_postaction); | |
199 | EXPORT_SYMBOL(dasd_alloc_erp_request); | |
200 | EXPORT_SYMBOL(dasd_free_erp_request); | |
201 | EXPORT_SYMBOL(dasd_log_sense); | |
fc19f381 | 202 |