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[S390] dasd set offline kernel bug.
[linux-2.6-block.git] / drivers / s390 / block / dasd_eckd.c
CommitLineData
138c014d 1/*
1da177e4
LT		 2 * File...........: linux/drivers/s390/block/dasd_eckd.c
3 * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
138c014d 4 * Horst Hummel <Horst.Hummel@de.ibm.com>
1da177e4
LT		 5 * Carsten Otte <Cotte@de.ibm.com>
6 * Martin Schwidefsky <schwidefsky@de.ibm.com>
7 * Bugreports.to..: <Linux390@de.ibm.com>
8 * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999,2000
9 *
1da177e4
LT		 10 */
11
1da177e4
LT		 12#include <linux/stddef.h>
13#include <linux/kernel.h>
14#include <linux/slab.h>
15#include <linux/hdreg.h> /* HDIO_GETGEO */
16#include <linux/bio.h>
17#include <linux/module.h>
18#include <linux/init.h>
19
20#include <asm/debug.h>
21#include <asm/idals.h>
22#include <asm/ebcdic.h>
23#include <asm/io.h>
24#include <asm/todclk.h>
25#include <asm/uaccess.h>
40545573 26#include <asm/cio.h>
1da177e4
LT		 27#include <asm/ccwdev.h>
28
29#include "dasd_int.h"
30#include "dasd_eckd.h"
31
32#ifdef PRINTK_HEADER
33#undef PRINTK_HEADER
34#endif /* PRINTK_HEADER */
35#define PRINTK_HEADER "dasd(eckd):"
36
37#define ECKD_C0(i) (i->home_bytes)
38#define ECKD_F(i) (i->formula)
39#define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\
40 (i->factors.f_0x02.f1))
41#define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\
42 (i->factors.f_0x02.f2))
43#define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\
44 (i->factors.f_0x02.f3))
45#define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0)
46#define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0)
47#define ECKD_F6(i) (i->factor6)
48#define ECKD_F7(i) (i->factor7)
49#define ECKD_F8(i) (i->factor8)
50
51MODULE_LICENSE("GPL");
52
53static struct dasd_discipline dasd_eckd_discipline;
54
55struct dasd_eckd_private {
56 struct dasd_eckd_characteristics rdc_data;
57 struct dasd_eckd_confdata conf_data;
58 struct dasd_eckd_path path_data;
59 struct eckd_count count_area[5];
60 int init_cqr_status;
61 int uses_cdl;
62 struct attrib_data_t attrib; /* e.g. cache operations */
63};
64
65/* The ccw bus type uses this table to find devices that it sends to
66 * dasd_eckd_probe */
67static struct ccw_device_id dasd_eckd_ids[] = {
d2c993d8
HC		 68 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1},
69 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2},
70 { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3390, 0), .driver_info = 0x3},
71 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4},
72 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5},
73 { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6},
74 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7},
75 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8},
76 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9},
77 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa},
1da177e4
LT		 78 { /* end of list */ },
79};
80
81MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids);
82
83static struct ccw_driver dasd_eckd_driver; /* see below */
84
85/* initial attempt at a probe function. this can be simplified once
86 * the other detection code is gone */
87static int
88dasd_eckd_probe (struct ccw_device *cdev)
89{
90 int ret;
91
40545573
HH		 92 /* set ECKD specific ccw-device options */
93 ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE);
94 if (ret) {
95 printk(KERN_WARNING
96 "dasd_eckd_probe: could not set ccw-device options "
97 "for %s\n", cdev->dev.bus_id);
1da177e4 98 return ret;
40545573
HH		 99 }
100 ret = dasd_generic_probe(cdev, &dasd_eckd_discipline);
101 return ret;
1da177e4
LT		 102}
103
104static int
105dasd_eckd_set_online(struct ccw_device *cdev)
106{
40545573 107 return dasd_generic_set_online(cdev, &dasd_eckd_discipline);
1da177e4
LT		 108}
109
110static struct ccw_driver dasd_eckd_driver = {
111 .name = "dasd-eckd",
112 .owner = THIS_MODULE,
113 .ids = dasd_eckd_ids,
114 .probe = dasd_eckd_probe,
115 .remove = dasd_generic_remove,
116 .set_offline = dasd_generic_set_offline,
117 .set_online = dasd_eckd_set_online,
118 .notify = dasd_generic_notify,
119};
120
121static const int sizes_trk0[] = { 28, 148, 84 };
122#define LABEL_SIZE 140
123
124static inline unsigned int
125round_up_multiple(unsigned int no, unsigned int mult)
126{
127 int rem = no % mult;
128 return (rem ? no - rem + mult : no);
129}
130
131static inline unsigned int
132ceil_quot(unsigned int d1, unsigned int d2)
133{
134 return (d1 + (d2 - 1)) / d2;
135}
136
137static inline int
138bytes_per_record(struct dasd_eckd_characteristics *rdc, int kl, int dl)
139{
140 unsigned int fl1, fl2, int1, int2;
141 int bpr;
142
143 switch (rdc->formula) {
144 case 0x01:
145 fl1 = round_up_multiple(ECKD_F2(rdc) + dl, ECKD_F1(rdc));
146 fl2 = round_up_multiple(kl ? ECKD_F2(rdc) + kl : 0,
147 ECKD_F1(rdc));
148 bpr = fl1 + fl2;
149 break;
150 case 0x02:
151 int1 = ceil_quot(dl + ECKD_F6(rdc), ECKD_F5(rdc) << 1);
152 int2 = ceil_quot(kl + ECKD_F6(rdc), ECKD_F5(rdc) << 1);
153 fl1 = round_up_multiple(ECKD_F1(rdc) * ECKD_F2(rdc) + dl +
154 ECKD_F6(rdc) + ECKD_F4(rdc) * int1,
155 ECKD_F1(rdc));
156 fl2 = round_up_multiple(ECKD_F1(rdc) * ECKD_F3(rdc) + kl +
157 ECKD_F6(rdc) + ECKD_F4(rdc) * int2,
158 ECKD_F1(rdc));
159 bpr = fl1 + fl2;
160 break;
161 default:
162 bpr = 0;
163 break;
164 }
165 return bpr;
166}
167
168static inline unsigned int
169bytes_per_track(struct dasd_eckd_characteristics *rdc)
170{
171 return *(unsigned int *) (rdc->byte_per_track) >> 8;
172}
173
174static inline unsigned int
175recs_per_track(struct dasd_eckd_characteristics * rdc,
176 unsigned int kl, unsigned int dl)
177{
178 int dn, kn;
179
180 switch (rdc->dev_type) {
181 case 0x3380:
182 if (kl)
183 return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) +
184 ceil_quot(dl + 12, 32));
185 else
186 return 1499 / (15 + ceil_quot(dl + 12, 32));
187 case 0x3390:
188 dn = ceil_quot(dl + 6, 232) + 1;
189 if (kl) {
190 kn = ceil_quot(kl + 6, 232) + 1;
191 return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) +
192 9 + ceil_quot(dl + 6 * dn, 34));
193 } else
194 return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34));
195 case 0x9345:
196 dn = ceil_quot(dl + 6, 232) + 1;
197 if (kl) {
198 kn = ceil_quot(kl + 6, 232) + 1;
199 return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) +
200 ceil_quot(dl + 6 * dn, 34));
201 } else
202 return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34));
203 }
204 return 0;
205}
206
207static inline void
208check_XRC (struct ccw1 *de_ccw,
209 struct DE_eckd_data *data,
210 struct dasd_device *device)
211{
212 struct dasd_eckd_private *private;
213
214 private = (struct dasd_eckd_private *) device->private;
215
216 /* switch on System Time Stamp - needed for XRC Support */
217 if (private->rdc_data.facilities.XRC_supported) {
138c014d 218
1da177e4
LT		 219 data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */
220 data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */
138c014d 221
1da177e4 222 data->ep_sys_time = get_clock ();
138c014d 223
1da177e4 224 de_ccw->count = sizeof (struct DE_eckd_data);
138c014d 225 de_ccw->flags |= CCW_FLAG_SLI;
1da177e4
LT		 226 }
227
228 return;
229
230} /* end check_XRC */
231
232static inline void
233define_extent(struct ccw1 * ccw, struct DE_eckd_data * data, int trk,
234 int totrk, int cmd, struct dasd_device * device)
235{
236 struct dasd_eckd_private *private;
237 struct ch_t geo, beg, end;
238
239 private = (struct dasd_eckd_private *) device->private;
240
241 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT;
242 ccw->flags = 0;
243 ccw->count = 16;
244 ccw->cda = (__u32) __pa(data);
245
246 memset(data, 0, sizeof (struct DE_eckd_data));
247 switch (cmd) {
248 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
249 case DASD_ECKD_CCW_READ_RECORD_ZERO:
250 case DASD_ECKD_CCW_READ:
251 case DASD_ECKD_CCW_READ_MT:
252 case DASD_ECKD_CCW_READ_CKD:
253 case DASD_ECKD_CCW_READ_CKD_MT:
254 case DASD_ECKD_CCW_READ_KD:
255 case DASD_ECKD_CCW_READ_KD_MT:
256 case DASD_ECKD_CCW_READ_COUNT:
257 data->mask.perm = 0x1;
258 data->attributes.operation = private->attrib.operation;
259 break;
260 case DASD_ECKD_CCW_WRITE:
261 case DASD_ECKD_CCW_WRITE_MT:
262 case DASD_ECKD_CCW_WRITE_KD:
263 case DASD_ECKD_CCW_WRITE_KD_MT:
264 data->mask.perm = 0x02;
265 data->attributes.operation = private->attrib.operation;
266 check_XRC (ccw, data, device);
267 break;
268 case DASD_ECKD_CCW_WRITE_CKD:
269 case DASD_ECKD_CCW_WRITE_CKD_MT:
270 data->attributes.operation = DASD_BYPASS_CACHE;
271 check_XRC (ccw, data, device);
272 break;
273 case DASD_ECKD_CCW_ERASE:
274 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
275 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
276 data->mask.perm = 0x3;
277 data->mask.auth = 0x1;
278 data->attributes.operation = DASD_BYPASS_CACHE;
279 check_XRC (ccw, data, device);
280 break;
281 default:
282 DEV_MESSAGE(KERN_ERR, device, "unknown opcode 0x%x", cmd);
283 break;
284 }
285
286 data->attributes.mode = 0x3; /* ECKD */
287
288 if ((private->rdc_data.cu_type == 0x2105 ||
289 private->rdc_data.cu_type == 0x2107 ||
290 private->rdc_data.cu_type == 0x1750)
291 && !(private->uses_cdl && trk < 2))
292 data->ga_extended |= 0x40; /* Regular Data Format Mode */
293
294 geo.cyl = private->rdc_data.no_cyl;
295 geo.head = private->rdc_data.trk_per_cyl;
296 beg.cyl = trk / geo.head;
297 beg.head = trk % geo.head;
298 end.cyl = totrk / geo.head;
299 end.head = totrk % geo.head;
300
301 /* check for sequential prestage - enhance cylinder range */
302 if (data->attributes.operation == DASD_SEQ_PRESTAGE ||
303 data->attributes.operation == DASD_SEQ_ACCESS) {
138c014d
HH		 304
305 if (end.cyl + private->attrib.nr_cyl < geo.cyl)
1da177e4
LT		 306 end.cyl += private->attrib.nr_cyl;
307 else
308 end.cyl = (geo.cyl - 1);
309 }
310
311 data->beg_ext.cyl = beg.cyl;
312 data->beg_ext.head = beg.head;
313 data->end_ext.cyl = end.cyl;
314 data->end_ext.head = end.head;
315}
316
317static inline void
318locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, int trk,
319 int rec_on_trk, int no_rec, int cmd,
320 struct dasd_device * device, int reclen)
321{
322 struct dasd_eckd_private *private;
323 int sector;
324 int dn, d;
138c014d 325
1da177e4
LT		 326 private = (struct dasd_eckd_private *) device->private;
327
328 DBF_DEV_EVENT(DBF_INFO, device,
329 "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d",
330 trk, rec_on_trk, no_rec, cmd, reclen);
331
332 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD;
333 ccw->flags = 0;
334 ccw->count = 16;
335 ccw->cda = (__u32) __pa(data);
336
337 memset(data, 0, sizeof (struct LO_eckd_data));
338 sector = 0;
339 if (rec_on_trk) {
340 switch (private->rdc_data.dev_type) {
341 case 0x3390:
342 dn = ceil_quot(reclen + 6, 232);
343 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
344 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
345 break;
346 case 0x3380:
347 d = 7 + ceil_quot(reclen + 12, 32);
348 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
349 break;
350 }
351 }
352 data->sector = sector;
353 data->count = no_rec;
354 switch (cmd) {
355 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
356 data->operation.orientation = 0x3;
357 data->operation.operation = 0x03;
358 break;
359 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
360 data->operation.orientation = 0x3;
361 data->operation.operation = 0x16;
362 break;
363 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
364 data->operation.orientation = 0x1;
365 data->operation.operation = 0x03;
366 data->count++;
367 break;
368 case DASD_ECKD_CCW_READ_RECORD_ZERO:
369 data->operation.orientation = 0x3;
370 data->operation.operation = 0x16;
371 data->count++;
372 break;
373 case DASD_ECKD_CCW_WRITE:
374 case DASD_ECKD_CCW_WRITE_MT:
375 case DASD_ECKD_CCW_WRITE_KD:
376 case DASD_ECKD_CCW_WRITE_KD_MT:
377 data->auxiliary.last_bytes_used = 0x1;
378 data->length = reclen;
379 data->operation.operation = 0x01;
380 break;
381 case DASD_ECKD_CCW_WRITE_CKD:
382 case DASD_ECKD_CCW_WRITE_CKD_MT:
383 data->auxiliary.last_bytes_used = 0x1;
384 data->length = reclen;
385 data->operation.operation = 0x03;
386 break;
387 case DASD_ECKD_CCW_READ:
388 case DASD_ECKD_CCW_READ_MT:
389 case DASD_ECKD_CCW_READ_KD:
390 case DASD_ECKD_CCW_READ_KD_MT:
391 data->auxiliary.last_bytes_used = 0x1;
392 data->length = reclen;
393 data->operation.operation = 0x06;
394 break;
395 case DASD_ECKD_CCW_READ_CKD:
396 case DASD_ECKD_CCW_READ_CKD_MT:
397 data->auxiliary.last_bytes_used = 0x1;
398 data->length = reclen;
399 data->operation.operation = 0x16;
400 break;
401 case DASD_ECKD_CCW_READ_COUNT:
402 data->operation.operation = 0x06;
403 break;
404 case DASD_ECKD_CCW_ERASE:
405 data->length = reclen;
406 data->auxiliary.last_bytes_used = 0x1;
407 data->operation.operation = 0x0b;
408 break;
409 default:
410 DEV_MESSAGE(KERN_ERR, device, "unknown opcode 0x%x", cmd);
411 }
412 data->seek_addr.cyl = data->search_arg.cyl =
413 trk / private->rdc_data.trk_per_cyl;
414 data->seek_addr.head = data->search_arg.head =
415 trk % private->rdc_data.trk_per_cyl;
416 data->search_arg.record = rec_on_trk;
417}
418
419/*
420 * Returns 1 if the block is one of the special blocks that needs
421 * to get read/written with the KD variant of the command.
422 * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and
423 * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT.
424 * Luckily the KD variants differ only by one bit (0x08) from the
425 * normal variant. So don't wonder about code like:
426 * if (dasd_eckd_cdl_special(blk_per_trk, recid))
427 * ccw->cmd_code |= 0x8;
428 */
429static inline int
430dasd_eckd_cdl_special(int blk_per_trk, int recid)
431{
432 if (recid < 3)
433 return 1;
434 if (recid < blk_per_trk)
435 return 0;
436 if (recid < 2 * blk_per_trk)
437 return 1;
438 return 0;
439}
440
441/*
442 * Returns the record size for the special blocks of the cdl format.
443 * Only returns something useful if dasd_eckd_cdl_special is true
444 * for the recid.
445 */
446static inline int
447dasd_eckd_cdl_reclen(int recid)
448{
449 if (recid < 3)
450 return sizes_trk0[recid];
451 return LABEL_SIZE;
452}
453
3d052595
HH		 454/*
455 * Generate device unique id that specifies the physical device.
456 */
457static int
458dasd_eckd_generate_uid(struct dasd_device *device, struct dasd_uid *uid)
459{
460 struct dasd_eckd_private *private;
461 struct dasd_eckd_confdata *confdata;
462
463 private = (struct dasd_eckd_private *) device->private;
464 if (!private)
465 return -ENODEV;
466 confdata = &private->conf_data;
467 if (!confdata)
468 return -ENODEV;
469
470 memset(uid, 0, sizeof(struct dasd_uid));
471 strncpy(uid->vendor, confdata->ned1.HDA_manufacturer,
472 sizeof(uid->vendor) - 1);
473 EBCASC(uid->vendor, sizeof(uid->vendor) - 1);
474 strncpy(uid->serial, confdata->ned1.HDA_location,
475 sizeof(uid->serial) - 1);
476 EBCASC(uid->serial, sizeof(uid->serial) - 1);
477 uid->ssid = confdata->neq.subsystemID;
478 if (confdata->ned2.sneq.flags == 0x40) {
479 uid->alias = 1;
480 uid->unit_addr = confdata->ned2.sneq.base_unit_addr;
481 } else
482 uid->unit_addr = confdata->ned1.unit_addr;
483
484 return 0;
485}
486
1da177e4
LT		 487static int
488dasd_eckd_read_conf(struct dasd_device *device)
489{
490 void *conf_data;
491 int conf_len, conf_data_saved;
492 int rc;
493 __u8 lpm;
494 struct dasd_eckd_private *private;
495 struct dasd_eckd_path *path_data;
496
497 private = (struct dasd_eckd_private *) device->private;
498 path_data = (struct dasd_eckd_path *) &private->path_data;
499 path_data->opm = ccw_device_get_path_mask(device->cdev);
500 lpm = 0x80;
501 conf_data_saved = 0;
502
503 /* get configuration data per operational path */
504 for (lpm = 0x80; lpm; lpm>>= 1) {
505 if (lpm & path_data->opm){
506 rc = read_conf_data_lpm(device->cdev, &conf_data,
507 &conf_len, lpm);
508 if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */
509 MESSAGE(KERN_WARNING,
510 "Read configuration data returned "
511 "error %d", rc);
512 return rc;
513 }
514 if (conf_data == NULL) {
515 MESSAGE(KERN_WARNING, "%s", "No configuration "
516 "data retrieved");
517 continue; /* no errror */
518 }
519 if (conf_len != sizeof (struct dasd_eckd_confdata)) {
520 MESSAGE(KERN_WARNING,
521 "sizes of configuration data mismatch"
522 "%d (read) vs %ld (expected)",
523 conf_len,
524 sizeof (struct dasd_eckd_confdata));
525 kfree(conf_data);
526 continue; /* no errror */
527 }
528 /* save first valid configuration data */
529 if (!conf_data_saved){
530 memcpy(&private->conf_data, conf_data,
531 sizeof (struct dasd_eckd_confdata));
532 conf_data_saved++;
533 }
534 switch (((char *)conf_data)[242] & 0x07){
535 case 0x02:
536 path_data->npm |= lpm;
537 break;
538 case 0x03:
539 path_data->ppm |= lpm;
540 break;
541 }
542 kfree(conf_data);
543 }
544 }
545 return 0;
546}
547
40545573
HH		 548/*
549 * Build CP for Perform Subsystem Function - SSC.
550 */
551struct dasd_ccw_req *
552dasd_eckd_build_psf_ssc(struct dasd_device *device)
553{
554 struct dasd_ccw_req *cqr;
555 struct dasd_psf_ssc_data *psf_ssc_data;
556 struct ccw1 *ccw;
557
558 cqr = dasd_smalloc_request("ECKD", 1 /* PSF */ ,
559 sizeof(struct dasd_psf_ssc_data),
560 device);
561
562 if (IS_ERR(cqr)) {
563 DEV_MESSAGE(KERN_WARNING, device, "%s",
564 "Could not allocate PSF-SSC request");
565 return cqr;
566 }
567 psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data;
568 psf_ssc_data->order = PSF_ORDER_SSC;
569 psf_ssc_data->suborder = 0x08;
570
571 ccw = cqr->cpaddr;
572 ccw->cmd_code = DASD_ECKD_CCW_PSF;
573 ccw->cda = (__u32)(addr_t)psf_ssc_data;
574 ccw->count = 66;
575
576 cqr->device = device;
577 cqr->expires = 10*HZ;
578 cqr->buildclk = get_clock();
579 cqr->status = DASD_CQR_FILLED;
580 return cqr;
581}
582
583/*
584 * Perform Subsystem Function.
585 * It is necessary to trigger CIO for channel revalidation since this
586 * call might change behaviour of DASD devices.
587 */
588static int
589dasd_eckd_psf_ssc(struct dasd_device *device)
590{
591 struct dasd_ccw_req *cqr;
592 int rc;
593
594 cqr = dasd_eckd_build_psf_ssc(device);
595 if (IS_ERR(cqr))
596 return PTR_ERR(cqr);
597
598 rc = dasd_sleep_on(cqr);
599 if (!rc)
600 /* trigger CIO to reprobe devices */
601 css_schedule_reprobe();
602 dasd_sfree_request(cqr, cqr->device);
603 return rc;
604}
605
606/*
607 * Valide storage server of current device.
608 */
609static int
610dasd_eckd_validate_server(struct dasd_device *device)
611{
612 int rc;
613
614 /* Currently PAV is the only reason to 'validate' server on LPAR */
615 if (dasd_nopav || MACHINE_IS_VM)
616 return 0;
617
618 rc = dasd_eckd_psf_ssc(device);
619 if (rc)
620 /* may be requested feature is not available on server,
621 * therefore just report error and go ahead */
622 DEV_MESSAGE(KERN_INFO, device,
623 "Perform Subsystem Function returned rc=%d", rc);
624 /* RE-Read Configuration Data */
625 return dasd_eckd_read_conf(device);
626}
627
3d052595
HH		 628/*
629 * Check device characteristics.
630 * If the device is accessible using ECKD discipline, the device is enabled.
631 */
1da177e4
LT		 632static int
633dasd_eckd_check_characteristics(struct dasd_device *device)
634{
635 struct dasd_eckd_private *private;
3d052595 636 struct dasd_uid uid;
1da177e4
LT		 637 void *rdc_data;
638 int rc;
639
640 private = (struct dasd_eckd_private *) device->private;
641 if (private == NULL) {
138c014d 642 private = kzalloc(sizeof(struct dasd_eckd_private),
1da177e4
LT		 643 GFP_KERNEL | GFP_DMA);
644 if (private == NULL) {
645 DEV_MESSAGE(KERN_WARNING, device, "%s",
646 "memory allocation failed for private "
647 "data");
648 return -ENOMEM;
649 }
1da177e4
LT		 650 device->private = (void *) private;
651 }
652 /* Invalidate status of initial analysis. */
653 private->init_cqr_status = -1;
654 /* Set default cache operations. */
655 private->attrib.operation = DASD_NORMAL_CACHE;
656 private->attrib.nr_cyl = 0;
657
40545573
HH		 658 /* Read Configuration Data */
659 rc = dasd_eckd_read_conf(device);
660 if (rc)
661 return rc;
662
663 /* Generate device unique id and register in devmap */
664 rc = dasd_eckd_generate_uid(device, &uid);
665 if (rc)
666 return rc;
667 rc = dasd_set_uid(device->cdev, &uid);
668 if (rc == 1) /* new server found */
669 rc = dasd_eckd_validate_server(device);
670 if (rc)
671 return rc;
672
1da177e4
LT		 673 /* Read Device Characteristics */
674 rdc_data = (void *) &(private->rdc_data);
3d052595 675 memset(rdc_data, 0, sizeof(rdc_data));
1da177e4 676 rc = read_dev_chars(device->cdev, &rdc_data, 64);
40545573 677 if (rc)
1da177e4 678 DEV_MESSAGE(KERN_WARNING, device,
40545573
HH		 679 "Read device characteristics returned "
680 "rc=%d", rc);
1da177e4
LT		 681
682 DEV_MESSAGE(KERN_INFO, device,
683 "%04X/%02X(CU:%04X/%02X) Cyl:%d Head:%d Sec:%d",
684 private->rdc_data.dev_type,
685 private->rdc_data.dev_model,
686 private->rdc_data.cu_type,
687 private->rdc_data.cu_model.model,
688 private->rdc_data.no_cyl,
689 private->rdc_data.trk_per_cyl,
690 private->rdc_data.sec_per_trk);
3d052595 691 return rc;
1da177e4
LT		 692}
693
694static struct dasd_ccw_req *
695dasd_eckd_analysis_ccw(struct dasd_device *device)
696{
697 struct dasd_eckd_private *private;
698 struct eckd_count *count_data;
699 struct LO_eckd_data *LO_data;
700 struct dasd_ccw_req *cqr;
701 struct ccw1 *ccw;
702 int cplength, datasize;
703 int i;
704
705 private = (struct dasd_eckd_private *) device->private;
706
707 cplength = 8;
708 datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data);
709 cqr = dasd_smalloc_request(dasd_eckd_discipline.name,
710 cplength, datasize, device);
711 if (IS_ERR(cqr))
712 return cqr;
713 ccw = cqr->cpaddr;
714 /* Define extent for the first 3 tracks. */
715 define_extent(ccw++, cqr->data, 0, 2,
716 DASD_ECKD_CCW_READ_COUNT, device);
717 LO_data = cqr->data + sizeof (struct DE_eckd_data);
718 /* Locate record for the first 4 records on track 0. */
719 ccw[-1].flags |= CCW_FLAG_CC;
720 locate_record(ccw++, LO_data++, 0, 0, 4,
721 DASD_ECKD_CCW_READ_COUNT, device, 0);
722
723 count_data = private->count_area;
724 for (i = 0; i < 4; i++) {
725 ccw[-1].flags |= CCW_FLAG_CC;
726 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
727 ccw->flags = 0;
728 ccw->count = 8;
729 ccw->cda = (__u32)(addr_t) count_data;
730 ccw++;
731 count_data++;
732 }
733
734 /* Locate record for the first record on track 2. */
735 ccw[-1].flags |= CCW_FLAG_CC;
736 locate_record(ccw++, LO_data++, 2, 0, 1,
737 DASD_ECKD_CCW_READ_COUNT, device, 0);
738 /* Read count ccw. */
739 ccw[-1].flags |= CCW_FLAG_CC;
740 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
741 ccw->flags = 0;
742 ccw->count = 8;
743 ccw->cda = (__u32)(addr_t) count_data;
744
745 cqr->device = device;
746 cqr->retries = 0;
747 cqr->buildclk = get_clock();
748 cqr->status = DASD_CQR_FILLED;
749 return cqr;
750}
751
752/*
753 * This is the callback function for the init_analysis cqr. It saves
754 * the status of the initial analysis ccw before it frees it and kicks
755 * the device to continue the startup sequence. This will call
756 * dasd_eckd_do_analysis again (if the devices has not been marked
757 * for deletion in the meantime).
758 */
759static void
760dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, void *data)
761{
762 struct dasd_eckd_private *private;
763 struct dasd_device *device;
764
765 device = init_cqr->device;
766 private = (struct dasd_eckd_private *) device->private;
767 private->init_cqr_status = init_cqr->status;
768 dasd_sfree_request(init_cqr, device);
769 dasd_kick_device(device);
770}
771
772static int
773dasd_eckd_start_analysis(struct dasd_device *device)
774{
775 struct dasd_eckd_private *private;
776 struct dasd_ccw_req *init_cqr;
777
778 private = (struct dasd_eckd_private *) device->private;
779 init_cqr = dasd_eckd_analysis_ccw(device);
780 if (IS_ERR(init_cqr))
781 return PTR_ERR(init_cqr);
782 init_cqr->callback = dasd_eckd_analysis_callback;
783 init_cqr->callback_data = NULL;
784 init_cqr->expires = 5*HZ;
785 dasd_add_request_head(init_cqr);
786 return -EAGAIN;
787}
788
789static int
790dasd_eckd_end_analysis(struct dasd_device *device)
791{
792 struct dasd_eckd_private *private;
793 struct eckd_count *count_area;
794 unsigned int sb, blk_per_trk;
795 int status, i;
796
797 private = (struct dasd_eckd_private *) device->private;
798 status = private->init_cqr_status;
799 private->init_cqr_status = -1;
800 if (status != DASD_CQR_DONE) {
801 DEV_MESSAGE(KERN_WARNING, device, "%s",
802 "volume analysis returned unformatted disk");
803 return -EMEDIUMTYPE;
804 }
805
806 private->uses_cdl = 1;
807 /* Calculate number of blocks/records per track. */
808 blk_per_trk = recs_per_track(&private->rdc_data, 0, device->bp_block);
809 /* Check Track 0 for Compatible Disk Layout */
810 count_area = NULL;
811 for (i = 0; i < 3; i++) {
812 if (private->count_area[i].kl != 4 ||
813 private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4) {
814 private->uses_cdl = 0;
815 break;
816 }
817 }
818 if (i == 3)
819 count_area = &private->count_area[4];
820
821 if (private->uses_cdl == 0) {
822 for (i = 0; i < 5; i++) {
823 if ((private->count_area[i].kl != 0) ||
824 (private->count_area[i].dl !=
825 private->count_area[0].dl))
826 break;
827 }
828 if (i == 5)
829 count_area = &private->count_area[0];
830 } else {
831 if (private->count_area[3].record == 1)
832 DEV_MESSAGE(KERN_WARNING, device, "%s",
833 "Trk 0: no records after VTOC!");
834 }
835 if (count_area != NULL && count_area->kl == 0) {
836 /* we found notthing violating our disk layout */
837 if (dasd_check_blocksize(count_area->dl) == 0)
838 device->bp_block = count_area->dl;
839 }
840 if (device->bp_block == 0) {
841 DEV_MESSAGE(KERN_WARNING, device, "%s",
842 "Volume has incompatible disk layout");
843 return -EMEDIUMTYPE;
844 }
845 device->s2b_shift = 0; /* bits to shift 512 to get a block */
846 for (sb = 512; sb < device->bp_block; sb = sb << 1)
847 device->s2b_shift++;
848
849 blk_per_trk = recs_per_track(&private->rdc_data, 0, device->bp_block);
850 device->blocks = (private->rdc_data.no_cyl *
851 private->rdc_data.trk_per_cyl *
852 blk_per_trk);
853
854 DEV_MESSAGE(KERN_INFO, device,
855 "(%dkB blks): %dkB at %dkB/trk %s",
856 (device->bp_block >> 10),
857 ((private->rdc_data.no_cyl *
858 private->rdc_data.trk_per_cyl *
859 blk_per_trk * (device->bp_block >> 9)) >> 1),
138c014d 860 ((blk_per_trk * device->bp_block) >> 10),
1da177e4
LT		 861 private->uses_cdl ?
862 "compatible disk layout" : "linux disk layout");
863
864 return 0;
865}
866
867static int
868dasd_eckd_do_analysis(struct dasd_device *device)
869{
870 struct dasd_eckd_private *private;
871
872 private = (struct dasd_eckd_private *) device->private;
873 if (private->init_cqr_status < 0)
874 return dasd_eckd_start_analysis(device);
875 else
876 return dasd_eckd_end_analysis(device);
877}
878
879static int
880dasd_eckd_fill_geometry(struct dasd_device *device, struct hd_geometry *geo)
881{
882 struct dasd_eckd_private *private;
883
884 private = (struct dasd_eckd_private *) device->private;
885 if (dasd_check_blocksize(device->bp_block) == 0) {
886 geo->sectors = recs_per_track(&private->rdc_data,
887 0, device->bp_block);
888 }
889 geo->cylinders = private->rdc_data.no_cyl;
890 geo->heads = private->rdc_data.trk_per_cyl;
891 return 0;
892}
893
894static struct dasd_ccw_req *
895dasd_eckd_format_device(struct dasd_device * device,
896 struct format_data_t * fdata)
897{
898 struct dasd_eckd_private *private;
899 struct dasd_ccw_req *fcp;
900 struct eckd_count *ect;
901 struct ccw1 *ccw;
902 void *data;
903 int rpt, cyl, head;
904 int cplength, datasize;
905 int i;
906
907 private = (struct dasd_eckd_private *) device->private;
908 rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize);
909 cyl = fdata->start_unit / private->rdc_data.trk_per_cyl;
910 head = fdata->start_unit % private->rdc_data.trk_per_cyl;
911
912 /* Sanity checks. */
913 if (fdata->start_unit >=
914 (private->rdc_data.no_cyl * private->rdc_data.trk_per_cyl)) {
915 DEV_MESSAGE(KERN_INFO, device, "Track no %d too big!",
916 fdata->start_unit);
917 return ERR_PTR(-EINVAL);
918 }
919 if (fdata->start_unit > fdata->stop_unit) {
920 DEV_MESSAGE(KERN_INFO, device, "Track %d reached! ending.",
921 fdata->start_unit);
922 return ERR_PTR(-EINVAL);
923 }
924 if (dasd_check_blocksize(fdata->blksize) != 0) {
925 DEV_MESSAGE(KERN_WARNING, device,
926 "Invalid blocksize %d...terminating!",
927 fdata->blksize);
928 return ERR_PTR(-EINVAL);
929 }
930
931 /*
932 * fdata->intensity is a bit string that tells us what to do:
933 * Bit 0: write record zero
934 * Bit 1: write home address, currently not supported
935 * Bit 2: invalidate tracks
936 * Bit 3: use OS/390 compatible disk layout (cdl)
937 * Only some bit combinations do make sense.
938 */
939 switch (fdata->intensity) {
940 case 0x00: /* Normal format */
941 case 0x08: /* Normal format, use cdl. */
942 cplength = 2 + rpt;
943 datasize = sizeof(struct DE_eckd_data) +
944 sizeof(struct LO_eckd_data) +
945 rpt * sizeof(struct eckd_count);
946 break;
947 case 0x01: /* Write record zero and format track. */
948 case 0x09: /* Write record zero and format track, use cdl. */
949 cplength = 3 + rpt;
950 datasize = sizeof(struct DE_eckd_data) +
951 sizeof(struct LO_eckd_data) +
952 sizeof(struct eckd_count) +
953 rpt * sizeof(struct eckd_count);
954 break;
955 case 0x04: /* Invalidate track. */
956 case 0x0c: /* Invalidate track, use cdl. */
957 cplength = 3;
958 datasize = sizeof(struct DE_eckd_data) +
959 sizeof(struct LO_eckd_data) +
960 sizeof(struct eckd_count);
961 break;
962 default:
963 DEV_MESSAGE(KERN_WARNING, device, "Invalid flags 0x%x.",
964 fdata->intensity);
965 return ERR_PTR(-EINVAL);
966 }
967 /* Allocate the format ccw request. */
968 fcp = dasd_smalloc_request(dasd_eckd_discipline.name,
969 cplength, datasize, device);
970 if (IS_ERR(fcp))
971 return fcp;
972
973 data = fcp->data;
974 ccw = fcp->cpaddr;
975
976 switch (fdata->intensity & ~0x08) {
977 case 0x00: /* Normal format. */
978 define_extent(ccw++, (struct DE_eckd_data *) data,
979 fdata->start_unit, fdata->start_unit,
980 DASD_ECKD_CCW_WRITE_CKD, device);
981 data += sizeof(struct DE_eckd_data);
982 ccw[-1].flags |= CCW_FLAG_CC;
983 locate_record(ccw++, (struct LO_eckd_data *) data,
984 fdata->start_unit, 0, rpt,
985 DASD_ECKD_CCW_WRITE_CKD, device,
986 fdata->blksize);
987 data += sizeof(struct LO_eckd_data);
988 break;
989 case 0x01: /* Write record zero + format track. */
990 define_extent(ccw++, (struct DE_eckd_data *) data,
991 fdata->start_unit, fdata->start_unit,
992 DASD_ECKD_CCW_WRITE_RECORD_ZERO,
993 device);
994 data += sizeof(struct DE_eckd_data);
995 ccw[-1].flags |= CCW_FLAG_CC;
996 locate_record(ccw++, (struct LO_eckd_data *) data,
997 fdata->start_unit, 0, rpt + 1,
998 DASD_ECKD_CCW_WRITE_RECORD_ZERO, device,
999 device->bp_block);
1000 data += sizeof(struct LO_eckd_data);
1001 break;
1002 case 0x04: /* Invalidate track. */
1003 define_extent(ccw++, (struct DE_eckd_data *) data,
1004 fdata->start_unit, fdata->start_unit,
1005 DASD_ECKD_CCW_WRITE_CKD, device);
1006 data += sizeof(struct DE_eckd_data);
1007 ccw[-1].flags |= CCW_FLAG_CC;
1008 locate_record(ccw++, (struct LO_eckd_data *) data,
1009 fdata->start_unit, 0, 1,
1010 DASD_ECKD_CCW_WRITE_CKD, device, 8);
1011 data += sizeof(struct LO_eckd_data);
1012 break;
1013 }
1014 if (fdata->intensity & 0x01) { /* write record zero */
1015 ect = (struct eckd_count *) data;
1016 data += sizeof(struct eckd_count);
1017 ect->cyl = cyl;
1018 ect->head = head;
1019 ect->record = 0;
1020 ect->kl = 0;
1021 ect->dl = 8;
1022 ccw[-1].flags |= CCW_FLAG_CC;
1023 ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO;
1024 ccw->flags = CCW_FLAG_SLI;
1025 ccw->count = 8;
1026 ccw->cda = (__u32)(addr_t) ect;
1027 ccw++;
1028 }
1029 if ((fdata->intensity & ~0x08) & 0x04) { /* erase track */
1030 ect = (struct eckd_count *) data;
1031 data += sizeof(struct eckd_count);
1032 ect->cyl = cyl;
1033 ect->head = head;
1034 ect->record = 1;
1035 ect->kl = 0;
1036 ect->dl = 0;
1037 ccw[-1].flags |= CCW_FLAG_CC;
1038 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD;
1039 ccw->flags = CCW_FLAG_SLI;
1040 ccw->count = 8;
1041 ccw->cda = (__u32)(addr_t) ect;
1042 } else { /* write remaining records */
1043 for (i = 0; i < rpt; i++) {
1044 ect = (struct eckd_count *) data;
1045 data += sizeof(struct eckd_count);
1046 ect->cyl = cyl;
1047 ect->head = head;
1048 ect->record = i + 1;
1049 ect->kl = 0;
1050 ect->dl = fdata->blksize;
1051 /* Check for special tracks 0-1 when formatting CDL */
1052 if ((fdata->intensity & 0x08) &&
1053 fdata->start_unit == 0) {
1054 if (i < 3) {
1055 ect->kl = 4;
1056 ect->dl = sizes_trk0[i] - 4;
138c014d 1057 }
1da177e4
LT		 1058 }
1059 if ((fdata->intensity & 0x08) &&
1060 fdata->start_unit == 1) {
1061 ect->kl = 44;
1062 ect->dl = LABEL_SIZE - 44;
1063 }
1064 ccw[-1].flags |= CCW_FLAG_CC;
1065 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD;
1066 ccw->flags = CCW_FLAG_SLI;
1067 ccw->count = 8;
1068 ccw->cda = (__u32)(addr_t) ect;
1069 ccw++;
1070 }
1071 }
1072 fcp->device = device;
1073 fcp->retries = 2; /* set retry counter to enable ERP */
1074 fcp->buildclk = get_clock();
1075 fcp->status = DASD_CQR_FILLED;
1076 return fcp;
1077}
1078
1079static dasd_era_t
1080dasd_eckd_examine_error(struct dasd_ccw_req * cqr, struct irb * irb)
1081{
1082 struct dasd_device *device = (struct dasd_device *) cqr->device;
1083 struct ccw_device *cdev = device->cdev;
1084
1085 if (irb->scsw.cstat == 0x00 &&
1086 irb->scsw.dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END))
1087 return dasd_era_none;
1088
1089 switch (cdev->id.cu_type) {
1090 case 0x3990:
1091 case 0x2105:
1092 case 0x2107:
1093 case 0x1750:
1094 return dasd_3990_erp_examine(cqr, irb);
1095 case 0x9343:
1096 return dasd_9343_erp_examine(cqr, irb);
1097 case 0x3880:
1098 default:
1099 DEV_MESSAGE(KERN_WARNING, device, "%s",
1100 "default (unknown CU type) - RECOVERABLE return");
1101 return dasd_era_recover;
1102 }
1103}
1104
1105static dasd_erp_fn_t
1106dasd_eckd_erp_action(struct dasd_ccw_req * cqr)
1107{
1108 struct dasd_device *device = (struct dasd_device *) cqr->device;
1109 struct ccw_device *cdev = device->cdev;
1110
1111 switch (cdev->id.cu_type) {
1112 case 0x3990:
1113 case 0x2105:
1114 case 0x2107:
1115 case 0x1750:
1116 return dasd_3990_erp_action;
1117 case 0x9343:
1118 case 0x3880:
1119 default:
1120 return dasd_default_erp_action;
1121 }
1122}
1123
1124static dasd_erp_fn_t
1125dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr)
1126{
1127 return dasd_default_erp_postaction;
1128}
1129
1130static struct dasd_ccw_req *
1131dasd_eckd_build_cp(struct dasd_device * device, struct request *req)
1132{
1133 struct dasd_eckd_private *private;
1134 unsigned long *idaws;
1135 struct LO_eckd_data *LO_data;
1136 struct dasd_ccw_req *cqr;
1137 struct ccw1 *ccw;
1138 struct bio *bio;
1139 struct bio_vec *bv;
1140 char *dst;
1141 unsigned int blksize, blk_per_trk, off;
1142 int count, cidaw, cplength, datasize;
1143 sector_t recid, first_rec, last_rec;
1144 sector_t first_trk, last_trk;
1145 unsigned int first_offs, last_offs;
1146 unsigned char cmd, rcmd;
1147 int i;
1148
1149 private = (struct dasd_eckd_private *) device->private;
1150 if (rq_data_dir(req) == READ)
1151 cmd = DASD_ECKD_CCW_READ_MT;
1152 else if (rq_data_dir(req) == WRITE)
1153 cmd = DASD_ECKD_CCW_WRITE_MT;
1154 else
1155 return ERR_PTR(-EINVAL);
1156 /* Calculate number of blocks/records per track. */
1157 blksize = device->bp_block;
1158 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
1159 /* Calculate record id of first and last block. */
1160 first_rec = first_trk = req->sector >> device->s2b_shift;
1161 first_offs = sector_div(first_trk, blk_per_trk);
1162 last_rec = last_trk =
1163 (req->sector + req->nr_sectors - 1) >> device->s2b_shift;
1164 last_offs = sector_div(last_trk, blk_per_trk);
1165 /* Check struct bio and count the number of blocks for the request. */
1166 count = 0;
1167 cidaw = 0;
1168 rq_for_each_bio(bio, req) {
1169 bio_for_each_segment(bv, bio, i) {
1170 if (bv->bv_len & (blksize - 1))
1171 /* Eckd can only do full blocks. */
1172 return ERR_PTR(-EINVAL);
1173 count += bv->bv_len >> (device->s2b_shift + 9);
347a8dc3 1174#if defined(CONFIG_64BIT)
1da177e4
LT		 1175 if (idal_is_needed (page_address(bv->bv_page),
1176 bv->bv_len))
1177 cidaw += bv->bv_len >> (device->s2b_shift + 9);
1178#endif
1179 }
1180 }
1181 /* Paranoia. */
1182 if (count != last_rec - first_rec + 1)
1183 return ERR_PTR(-EINVAL);
1184 /* 1x define extent + 1x locate record + number of blocks */
1185 cplength = 2 + count;
1186 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */
1187 datasize = sizeof(struct DE_eckd_data) + sizeof(struct LO_eckd_data) +
1188 cidaw * sizeof(unsigned long);
1189 /* Find out the number of additional locate record ccws for cdl. */
1190 if (private->uses_cdl && first_rec < 2*blk_per_trk) {
1191 if (last_rec >= 2*blk_per_trk)
1192 count = 2*blk_per_trk - first_rec;
1193 cplength += count;
1194 datasize += count*sizeof(struct LO_eckd_data);
1195 }
1196 /* Allocate the ccw request. */
1197 cqr = dasd_smalloc_request(dasd_eckd_discipline.name,
1198 cplength, datasize, device);
1199 if (IS_ERR(cqr))
1200 return cqr;
1201 ccw = cqr->cpaddr;
1202 /* First ccw is define extent. */
1203 define_extent(ccw++, cqr->data, first_trk, last_trk, cmd, device);
1204 /* Build locate_record+read/write/ccws. */
1205 idaws = (unsigned long *) (cqr->data + sizeof(struct DE_eckd_data));
1206 LO_data = (struct LO_eckd_data *) (idaws + cidaw);
1207 recid = first_rec;
1208 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) {
1209 /* Only standard blocks so there is just one locate record. */
1210 ccw[-1].flags |= CCW_FLAG_CC;
1211 locate_record(ccw++, LO_data++, first_trk, first_offs + 1,
1212 last_rec - recid + 1, cmd, device, blksize);
1213 }
1214 rq_for_each_bio(bio, req) bio_for_each_segment(bv, bio, i) {
1215 dst = page_address(bv->bv_page) + bv->bv_offset;
1216 if (dasd_page_cache) {
1217 char *copy = kmem_cache_alloc(dasd_page_cache,
1218 SLAB_DMA | __GFP_NOWARN);
1219 if (copy && rq_data_dir(req) == WRITE)
1220 memcpy(copy + bv->bv_offset, dst, bv->bv_len);
1221 if (copy)
1222 dst = copy + bv->bv_offset;
1223 }
1224 for (off = 0; off < bv->bv_len; off += blksize) {
1225 sector_t trkid = recid;
1226 unsigned int recoffs = sector_div(trkid, blk_per_trk);
1227 rcmd = cmd;
1228 count = blksize;
1229 /* Locate record for cdl special block ? */
1230 if (private->uses_cdl && recid < 2*blk_per_trk) {
1231 if (dasd_eckd_cdl_special(blk_per_trk, recid)){
1232 rcmd |= 0x8;
1233 count = dasd_eckd_cdl_reclen(recid);
ec5883ab
HH		 1234 if (count < blksize &&
1235 rq_data_dir(req) == READ)
1da177e4
LT		 1236 memset(dst + count, 0xe5,
1237 blksize - count);
1238 }
1239 ccw[-1].flags |= CCW_FLAG_CC;
1240 locate_record(ccw++, LO_data++,
1241 trkid, recoffs + 1,
1242 1, rcmd, device, count);
1243 }
1244 /* Locate record for standard blocks ? */
1245 if (private->uses_cdl && recid == 2*blk_per_trk) {
1246 ccw[-1].flags |= CCW_FLAG_CC;
1247 locate_record(ccw++, LO_data++,
1248 trkid, recoffs + 1,
1249 last_rec - recid + 1,
1250 cmd, device, count);
1251 }
1252 /* Read/write ccw. */
1253 ccw[-1].flags |= CCW_FLAG_CC;
1254 ccw->cmd_code = rcmd;
1255 ccw->count = count;
1256 if (idal_is_needed(dst, blksize)) {
1257 ccw->cda = (__u32)(addr_t) idaws;
1258 ccw->flags = CCW_FLAG_IDA;
1259 idaws = idal_create_words(idaws, dst, blksize);
1260 } else {
1261 ccw->cda = (__u32)(addr_t) dst;
1262 ccw->flags = 0;
1263 }
1264 ccw++;
1265 dst += blksize;
1266 recid++;
1267 }
1268 }
1c01b8a5
HH		 1269 if (req->flags & REQ_FAILFAST)
1270 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
1da177e4
LT		 1271 cqr->device = device;
1272 cqr->expires = 5 * 60 * HZ; /* 5 minutes */
1273 cqr->lpm = private->path_data.ppm;
1274 cqr->retries = 256;
1275 cqr->buildclk = get_clock();
1276 cqr->status = DASD_CQR_FILLED;
1277 return cqr;
1278}
1279
1280static int
1281dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req)
1282{
1283 struct dasd_eckd_private *private;
1284 struct ccw1 *ccw;
1285 struct bio *bio;
1286 struct bio_vec *bv;
1287 char *dst, *cda;
1288 unsigned int blksize, blk_per_trk, off;
1289 sector_t recid;
1290 int i, status;
1291
1292 if (!dasd_page_cache)
1293 goto out;
1294 private = (struct dasd_eckd_private *) cqr->device->private;
1295 blksize = cqr->device->bp_block;
1296 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
1297 recid = req->sector >> cqr->device->s2b_shift;
1298 ccw = cqr->cpaddr;
1299 /* Skip over define extent & locate record. */
1300 ccw++;
1301 if (private->uses_cdl == 0 || recid > 2*blk_per_trk)
1302 ccw++;
1303 rq_for_each_bio(bio, req) bio_for_each_segment(bv, bio, i) {
1304 dst = page_address(bv->bv_page) + bv->bv_offset;
1305 for (off = 0; off < bv->bv_len; off += blksize) {
1306 /* Skip locate record. */
1307 if (private->uses_cdl && recid <= 2*blk_per_trk)
1308 ccw++;
1309 if (dst) {
1310 if (ccw->flags & CCW_FLAG_IDA)
1311 cda = *((char **)((addr_t) ccw->cda));
1312 else
1313 cda = (char *)((addr_t) ccw->cda);
1314 if (dst != cda) {
1315 if (rq_data_dir(req) == READ)
1316 memcpy(dst, cda, bv->bv_len);
1317 kmem_cache_free(dasd_page_cache,
1318 (void *)((addr_t)cda & PAGE_MASK));
1319 }
1320 dst = NULL;
1321 }
1322 ccw++;
1323 recid++;
1324 }
1325 }
1326out:
1327 status = cqr->status == DASD_CQR_DONE;
1328 dasd_sfree_request(cqr, cqr->device);
1329 return status;
1330}
1331
1332static int
1333dasd_eckd_fill_info(struct dasd_device * device,
1334 struct dasd_information2_t * info)
1335{
1336 struct dasd_eckd_private *private;
1337
1338 private = (struct dasd_eckd_private *) device->private;
1339 info->label_block = 2;
1340 info->FBA_layout = private->uses_cdl ? 0 : 1;
1341 info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL;
1342 info->characteristics_size = sizeof(struct dasd_eckd_characteristics);
1343 memcpy(info->characteristics, &private->rdc_data,
1344 sizeof(struct dasd_eckd_characteristics));
1345 info->confdata_size = sizeof (struct dasd_eckd_confdata);
1346 memcpy(info->configuration_data, &private->conf_data,
1347 sizeof (struct dasd_eckd_confdata));
1348 return 0;
1349}
1350
1351/*
1352 * SECTION: ioctl functions for eckd devices.
1353 */
1354
1355/*
1356 * Release device ioctl.
138c014d 1357 * Buils a channel programm to releases a prior reserved
1da177e4
LT		 1358 * (see dasd_eckd_reserve) device.
1359 */
1360static int
1107ccfb 1361dasd_eckd_release(struct dasd_device *device)
1da177e4 1362{
1da177e4
LT		 1363 struct dasd_ccw_req *cqr;
1364 int rc;
1365
1366 if (!capable(CAP_SYS_ADMIN))
1367 return -EACCES;
1368
1da177e4
LT		 1369 cqr = dasd_smalloc_request(dasd_eckd_discipline.name,
1370 1, 32, device);
1371 if (IS_ERR(cqr)) {
1372 DEV_MESSAGE(KERN_WARNING, device, "%s",
1373 "Could not allocate initialization request");
1374 return PTR_ERR(cqr);
1375 }
1376 cqr->cpaddr->cmd_code = DASD_ECKD_CCW_RELEASE;
1377 cqr->cpaddr->flags |= CCW_FLAG_SLI;
1378 cqr->cpaddr->count = 32;
1379 cqr->cpaddr->cda = (__u32)(addr_t) cqr->data;
1380 cqr->device = device;
1381 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1c01b8a5 1382 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
1da177e4
LT		 1383 cqr->retries = 0;
1384 cqr->expires = 2 * HZ;
1385 cqr->buildclk = get_clock();
1386 cqr->status = DASD_CQR_FILLED;
1387
1388 rc = dasd_sleep_on_immediatly(cqr);
1389
1390 dasd_sfree_request(cqr, cqr->device);
1391 return rc;
1392}
1393
1394/*
1395 * Reserve device ioctl.
1396 * Options are set to 'synchronous wait for interrupt' and
138c014d
HH		 1397 * 'timeout the request'. This leads to a terminate IO if
1398 * the interrupt is outstanding for a certain time.
1da177e4
LT		 1399 */
1400static int
1107ccfb 1401dasd_eckd_reserve(struct dasd_device *device)
1da177e4 1402{
1da177e4
LT		 1403 struct dasd_ccw_req *cqr;
1404 int rc;
1405
1406 if (!capable(CAP_SYS_ADMIN))
1407 return -EACCES;
1408
1da177e4
LT		 1409 cqr = dasd_smalloc_request(dasd_eckd_discipline.name,
1410 1, 32, device);
1411 if (IS_ERR(cqr)) {
1412 DEV_MESSAGE(KERN_WARNING, device, "%s",
1413 "Could not allocate initialization request");
1414 return PTR_ERR(cqr);
1415 }
1416 cqr->cpaddr->cmd_code = DASD_ECKD_CCW_RESERVE;
1417 cqr->cpaddr->flags |= CCW_FLAG_SLI;
1418 cqr->cpaddr->count = 32;
1419 cqr->cpaddr->cda = (__u32)(addr_t) cqr->data;
1420 cqr->device = device;
1421 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1c01b8a5 1422 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
1da177e4
LT		 1423 cqr->retries = 0;
1424 cqr->expires = 2 * HZ;
1425 cqr->buildclk = get_clock();
1426 cqr->status = DASD_CQR_FILLED;
1427
1428 rc = dasd_sleep_on_immediatly(cqr);
1429
1430 dasd_sfree_request(cqr, cqr->device);
1431 return rc;
1432}
1433
1434/*
1435 * Steal lock ioctl - unconditional reserve device.
138c014d 1436 * Buils a channel programm to break a device's reservation.
1da177e4
LT		 1437 * (unconditional reserve)
1438 */
1439static int
1107ccfb 1440dasd_eckd_steal_lock(struct dasd_device *device)
1da177e4 1441{
1da177e4
LT		 1442 struct dasd_ccw_req *cqr;
1443 int rc;
1444
1445 if (!capable(CAP_SYS_ADMIN))
1446 return -EACCES;
1447
1da177e4
LT		 1448 cqr = dasd_smalloc_request(dasd_eckd_discipline.name,
1449 1, 32, device);
1450 if (IS_ERR(cqr)) {
1451 DEV_MESSAGE(KERN_WARNING, device, "%s",
1452 "Could not allocate initialization request");
1453 return PTR_ERR(cqr);
1454 }
1455 cqr->cpaddr->cmd_code = DASD_ECKD_CCW_SLCK;
1456 cqr->cpaddr->flags |= CCW_FLAG_SLI;
1457 cqr->cpaddr->count = 32;
1458 cqr->cpaddr->cda = (__u32)(addr_t) cqr->data;
1459 cqr->device = device;
1460 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1c01b8a5 1461 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
1da177e4
LT		 1462 cqr->retries = 0;
1463 cqr->expires = 2 * HZ;
1464 cqr->buildclk = get_clock();
1465 cqr->status = DASD_CQR_FILLED;
1466
1467 rc = dasd_sleep_on_immediatly(cqr);
1468
1469 dasd_sfree_request(cqr, cqr->device);
1470 return rc;
1471}
1472
1473/*
1474 * Read performance statistics
1475 */
1476static int
1107ccfb 1477dasd_eckd_performance(struct dasd_device *device, void __user *argp)
1da177e4 1478{
1da177e4
LT		 1479 struct dasd_psf_prssd_data *prssdp;
1480 struct dasd_rssd_perf_stats_t *stats;
1481 struct dasd_ccw_req *cqr;
1482 struct ccw1 *ccw;
1483 int rc;
1484
1da177e4
LT		 1485 cqr = dasd_smalloc_request(dasd_eckd_discipline.name,
1486 1 /* PSF */ + 1 /* RSSD */ ,
1487 (sizeof (struct dasd_psf_prssd_data) +
1488 sizeof (struct dasd_rssd_perf_stats_t)),
1489 device);
1490 if (IS_ERR(cqr)) {
1491 DEV_MESSAGE(KERN_WARNING, device, "%s",
1492 "Could not allocate initialization request");
1493 return PTR_ERR(cqr);
1494 }
1495 cqr->device = device;
1496 cqr->retries = 0;
1497 cqr->expires = 10 * HZ;
1498
1499 /* Prepare for Read Subsystem Data */
1500 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
1501 memset(prssdp, 0, sizeof (struct dasd_psf_prssd_data));
1502 prssdp->order = PSF_ORDER_PRSSD;
1503 prssdp->suborder = 0x01; /* Perfomance Statistics */
1504 prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */
1505
1506 ccw = cqr->cpaddr;
1507 ccw->cmd_code = DASD_ECKD_CCW_PSF;
1508 ccw->count = sizeof (struct dasd_psf_prssd_data);
1509 ccw->flags |= CCW_FLAG_CC;
1510 ccw->cda = (__u32)(addr_t) prssdp;
1511
1512 /* Read Subsystem Data - Performance Statistics */
1513 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
1514 memset(stats, 0, sizeof (struct dasd_rssd_perf_stats_t));
1515
1516 ccw++;
1517 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
1518 ccw->count = sizeof (struct dasd_rssd_perf_stats_t);
1519 ccw->cda = (__u32)(addr_t) stats;
1520
1521 cqr->buildclk = get_clock();
1522 cqr->status = DASD_CQR_FILLED;
1523 rc = dasd_sleep_on(cqr);
1524 if (rc == 0) {
1525 /* Prepare for Read Subsystem Data */
1526 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
1527 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
1107ccfb
CH		 1528 if (copy_to_user(argp, stats,
1529 sizeof(struct dasd_rssd_perf_stats_t)))
1530 rc = -EFAULT;
1da177e4
LT		 1531 }
1532 dasd_sfree_request(cqr, cqr->device);
1533 return rc;
1534}
1535
1536/*
1537 * Get attributes (cache operations)
1538 * Returnes the cache attributes used in Define Extend (DE).
1539 */
1540static int
1107ccfb 1541dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp)
1da177e4 1542{
1107ccfb
CH		 1543 struct dasd_eckd_private *private =
1544 (struct dasd_eckd_private *)device->private;
1545 struct attrib_data_t attrib = private->attrib;
1da177e4
LT		 1546 int rc;
1547
1548 if (!capable(CAP_SYS_ADMIN))
1549 return -EACCES;
1107ccfb 1550 if (!argp)
1da177e4
LT		 1551 return -EINVAL;
1552
1107ccfb
CH		 1553 rc = 0;
1554 if (copy_to_user(argp, (long *) &attrib,
1555 sizeof (struct attrib_data_t)))
1556 rc = -EFAULT;
1da177e4
LT		 1557
1558 return rc;
1559}
1560
1561/*
1562 * Set attributes (cache operations)
1563 * Stores the attributes for cache operation to be used in Define Extend (DE).
1564 */
1565static int
1107ccfb 1566dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp)
1da177e4 1567{
1107ccfb
CH		 1568 struct dasd_eckd_private *private =
1569 (struct dasd_eckd_private *)device->private;
1da177e4
LT		 1570 struct attrib_data_t attrib;
1571
1572 if (!capable(CAP_SYS_ADMIN))
1573 return -EACCES;
1107ccfb 1574 if (!argp)
1da177e4
LT		 1575 return -EINVAL;
1576
1107ccfb 1577 if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t)))
1da177e4 1578 return -EFAULT;
1da177e4
LT		 1579 private->attrib = attrib;
1580
1581 DEV_MESSAGE(KERN_INFO, device,
1582 "cache operation mode set to %x (%i cylinder prestage)",
1583 private->attrib.operation, private->attrib.nr_cyl);
1584 return 0;
1585}
1586
1107ccfb
CH		 1587static int
1588dasd_eckd_ioctl(struct dasd_device *device, unsigned int cmd, void __user *argp)
1589{
1590 switch (cmd) {
1591 case BIODASDGATTR:
1592 return dasd_eckd_get_attrib(device, argp);
1593 case BIODASDSATTR:
1594 return dasd_eckd_set_attrib(device, argp);
1595 case BIODASDPSRD:
1596 return dasd_eckd_performance(device, argp);
1597 case BIODASDRLSE:
1598 return dasd_eckd_release(device);
1599 case BIODASDRSRV:
1600 return dasd_eckd_reserve(device);
1601 case BIODASDSLCK:
1602 return dasd_eckd_steal_lock(device);
1603 default:
1604 return -ENOIOCTLCMD;
1605 }
1606}
1607
445b5b49
HH		 1608/*
1609 * Dump the range of CCWs into 'page' buffer
1610 * and return number of printed chars.
1611 */
1612static inline int
1613dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page)
1614{
1615 int len, count;
1616 char *datap;
1617
1618 len = 0;
1619 while (from <= to) {
1620 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
1621 " CCW %p: %08X %08X DAT:",
1622 from, ((int *) from)[0], ((int *) from)[1]);
1623
1624 /* get pointer to data (consider IDALs) */
1625 if (from->flags & CCW_FLAG_IDA)
1626 datap = (char *) *((addr_t *) (addr_t) from->cda);
1627 else
1628 datap = (char *) ((addr_t) from->cda);
1629
1630 /* dump data (max 32 bytes) */
1631 for (count = 0; count < from->count && count < 32; count++) {
1632 if (count % 8 == 0) len += sprintf(page + len, " ");
1633 if (count % 4 == 0) len += sprintf(page + len, " ");
1634 len += sprintf(page + len, "%02x", datap[count]);
1635 }
1636 len += sprintf(page + len, "\n");
1637 from++;
1638 }
1639 return len;
1640}
1641
1da177e4
LT		 1642/*
1643 * Print sense data and related channel program.
1644 * Parts are printed because printk buffer is only 1024 bytes.
1645 */
1646static void
1647dasd_eckd_dump_sense(struct dasd_device *device, struct dasd_ccw_req * req,
1648 struct irb *irb)
1649{
1650 char *page;
445b5b49
HH		 1651 struct ccw1 *first, *last, *fail, *from, *to;
1652 int len, sl, sct;
1da177e4
LT		 1653
1654 page = (char *) get_zeroed_page(GFP_ATOMIC);
1655 if (page == NULL) {
1656 DEV_MESSAGE(KERN_ERR, device, " %s",
1657 "No memory to dump sense data");
1658 return;
1659 }
445b5b49
HH		 1660 /* dump the sense data */
1661 len = sprintf(page, KERN_ERR PRINTK_HEADER
1da177e4
LT		 1662 " I/O status report for device %s:\n",
1663 device->cdev->dev.bus_id);
1664 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
1665 " in req: %p CS: 0x%02X DS: 0x%02X\n", req,
1666 irb->scsw.cstat, irb->scsw.dstat);
1667 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
1668 " device %s: Failing CCW: %p\n",
1669 device->cdev->dev.bus_id,
1670 (void *) (addr_t) irb->scsw.cpa);
1671 if (irb->esw.esw0.erw.cons) {
1672 for (sl = 0; sl < 4; sl++) {
1673 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
1674 " Sense(hex) %2d-%2d:",
1675 (8 * sl), ((8 * sl) + 7));
1676
1677 for (sct = 0; sct < 8; sct++) {
1678 len += sprintf(page + len, " %02x",
1679 irb->ecw[8 * sl + sct]);
1680 }
1681 len += sprintf(page + len, "\n");
1682 }
1683
1684 if (irb->ecw[27] & DASD_SENSE_BIT_0) {
1685 /* 24 Byte Sense Data */
445b5b49
HH		 1686 sprintf(page + len, KERN_ERR PRINTK_HEADER
1687 " 24 Byte: %x MSG %x, "
1688 "%s MSGb to SYSOP\n",
1689 irb->ecw[7] >> 4, irb->ecw[7] & 0x0f,
1690 irb->ecw[1] & 0x10 ? "" : "no");
1da177e4
LT		 1691 } else {
1692 /* 32 Byte Sense Data */
445b5b49
HH		 1693 sprintf(page + len, KERN_ERR PRINTK_HEADER
1694 " 32 Byte: Format: %x "
1695 "Exception class %x\n",
1696 irb->ecw[6] & 0x0f, irb->ecw[22] >> 4);
1da177e4
LT		 1697 }
1698 } else {
445b5b49
HH		 1699 sprintf(page + len, KERN_ERR PRINTK_HEADER
1700 " SORRY - NO VALID SENSE AVAILABLE\n");
1da177e4 1701 }
445b5b49
HH		 1702 printk("%s", page);
1703
1704 /* dump the Channel Program (max 140 Bytes per line) */
1705 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */
1706 first = req->cpaddr;
1707 for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++);
1708 to = min(first + 6, last);
1709 len = sprintf(page, KERN_ERR PRINTK_HEADER
1da177e4 1710 " Related CP in req: %p\n", req);
445b5b49
HH		 1711 dasd_eckd_dump_ccw_range(first, to, page + len);
1712 printk("%s", page);
1da177e4 1713
445b5b49
HH		 1714 /* print failing CCW area (maximum 4) */
1715 /* scsw->cda is either valid or zero */
1da177e4 1716 len = 0;
445b5b49
HH		 1717 from = ++to;
1718 fail = (struct ccw1 *)(addr_t) irb->scsw.cpa; /* failing CCW */
1719 if (from < fail - 2) {
1720 from = fail - 2; /* there is a gap - print header */
1721 len += sprintf(page, KERN_ERR PRINTK_HEADER "......\n");
1da177e4 1722 }
445b5b49
HH		 1723 to = min(fail + 1, last);
1724 len += dasd_eckd_dump_ccw_range(from, to, page + len);
1da177e4 1725
445b5b49
HH		 1726 /* print last CCWs (maximum 2) */
1727 from = max(from, ++to);
1728 if (from < last - 1) {
1729 from = last - 1; /* there is a gap - print header */
1da177e4
LT		 1730 len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n");
1731 }
445b5b49 1732 len += dasd_eckd_dump_ccw_range(from, last, page + len);
1da177e4 1733 if (len > 0)
445b5b49 1734 printk("%s", page);
1da177e4
LT		 1735 free_page((unsigned long) page);
1736}
1737
1738/*
1739 * max_blocks is dependent on the amount of storage that is available
1740 * in the static io buffer for each device. Currently each device has
1741 * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has
1742 * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use
1743 * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In
1744 * addition we have one define extent ccw + 16 bytes of data and one
1745 * locate record ccw + 16 bytes of data. That makes:
1746 * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum.
1747 * We want to fit two into the available memory so that we can immediately
1748 * start the next request if one finishes off. That makes 249.5 blocks
1749 * for one request. Give a little safety and the result is 240.
1750 */
1751static struct dasd_discipline dasd_eckd_discipline = {
1752 .owner = THIS_MODULE,
1753 .name = "ECKD",
1754 .ebcname = "ECKD",
1755 .max_blocks = 240,
1756 .check_device = dasd_eckd_check_characteristics,
1757 .do_analysis = dasd_eckd_do_analysis,
1758 .fill_geometry = dasd_eckd_fill_geometry,
1759 .start_IO = dasd_start_IO,
1760 .term_IO = dasd_term_IO,
1761 .format_device = dasd_eckd_format_device,
1762 .examine_error = dasd_eckd_examine_error,
1763 .erp_action = dasd_eckd_erp_action,
1764 .erp_postaction = dasd_eckd_erp_postaction,
1765 .build_cp = dasd_eckd_build_cp,
1766 .free_cp = dasd_eckd_free_cp,
1767 .dump_sense = dasd_eckd_dump_sense,
1768 .fill_info = dasd_eckd_fill_info,
1107ccfb 1769 .ioctl = dasd_eckd_ioctl,
1da177e4
LT		 1770};
1771
1772static int __init
1773dasd_eckd_init(void)
1774{
1da177e4 1775 ASCEBC(dasd_eckd_discipline.ebcname, 4);
40545573 1776 return ccw_driver_register(&dasd_eckd_driver);
1da177e4
LT		 1777}
1778
1779static void __exit
1780dasd_eckd_cleanup(void)
1781{
1782 ccw_driver_unregister(&dasd_eckd_driver);
1da177e4
LT		 1783}
1784
1785module_init(dasd_eckd_init);
1786module_exit(dasd_eckd_cleanup);
Linux 6.x block layer and io_uring tree(s)