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[PATCH] Driver Core: drivers/i2c/chips/w83781d.c - drivers/s390/block/dcssblk.c:...
[deliverable/linux.git] / drivers / s390 / block / dasd_eckd.c
CommitLineData
1da177e4
LT		 1/*
2 * File...........: linux/drivers/s390/block/dasd_eckd.c
3 * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
4 * Horst Hummel <Horst.Hummel@de.ibm.com>
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 *
ec5883ab 10 * $Revision: 1.71 $
1da177e4
LT		 11 */
12
13#include <linux/config.h>
14#include <linux/stddef.h>
15#include <linux/kernel.h>
16#include <linux/slab.h>
17#include <linux/hdreg.h> /* HDIO_GETGEO */
18#include <linux/bio.h>
19#include <linux/module.h>
20#include <linux/init.h>
21
22#include <asm/debug.h>
23#include <asm/idals.h>
24#include <asm/ebcdic.h>
25#include <asm/io.h>
26#include <asm/todclk.h>
27#include <asm/uaccess.h>
28#include <asm/ccwdev.h>
29
30#include "dasd_int.h"
31#include "dasd_eckd.h"
32
33#ifdef PRINTK_HEADER
34#undef PRINTK_HEADER
35#endif /* PRINTK_HEADER */
36#define PRINTK_HEADER "dasd(eckd):"
37
38#define ECKD_C0(i) (i->home_bytes)
39#define ECKD_F(i) (i->formula)
40#define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\
41 (i->factors.f_0x02.f1))
42#define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\
43 (i->factors.f_0x02.f2))
44#define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\
45 (i->factors.f_0x02.f3))
46#define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0)
47#define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0)
48#define ECKD_F6(i) (i->factor6)
49#define ECKD_F7(i) (i->factor7)
50#define ECKD_F8(i) (i->factor8)
51
52MODULE_LICENSE("GPL");
53
54static struct dasd_discipline dasd_eckd_discipline;
55
56struct dasd_eckd_private {
57 struct dasd_eckd_characteristics rdc_data;
58 struct dasd_eckd_confdata conf_data;
59 struct dasd_eckd_path path_data;
60 struct eckd_count count_area[5];
61 int init_cqr_status;
62 int uses_cdl;
63 struct attrib_data_t attrib; /* e.g. cache operations */
64};
65
66/* The ccw bus type uses this table to find devices that it sends to
67 * dasd_eckd_probe */
68static struct ccw_device_id dasd_eckd_ids[] = {
69 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), driver_info: 0x1},
70 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), driver_info: 0x2},
71 { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3390, 0), driver_info: 0x3},
72 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), driver_info: 0x4},
73 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), driver_info: 0x5},
74 { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), driver_info: 0x6},
75 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), driver_info: 0x7},
76 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), driver_info: 0x8},
77 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), driver_info: 0x9},
78 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), driver_info: 0xa},
79 { /* end of list */ },
80};
81
82MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids);
83
84static struct ccw_driver dasd_eckd_driver; /* see below */
85
86/* initial attempt at a probe function. this can be simplified once
87 * the other detection code is gone */
88static int
89dasd_eckd_probe (struct ccw_device *cdev)
90{
91 int ret;
92
93 ret = dasd_generic_probe (cdev, &dasd_eckd_discipline);
94 if (ret)
95 return ret;
96 ccw_device_set_options(cdev, CCWDEV_DO_PATHGROUP | CCWDEV_ALLOW_FORCE);
97 return 0;
98}
99
100static int
101dasd_eckd_set_online(struct ccw_device *cdev)
102{
103 return dasd_generic_set_online (cdev, &dasd_eckd_discipline);
104}
105
106static struct ccw_driver dasd_eckd_driver = {
107 .name = "dasd-eckd",
108 .owner = THIS_MODULE,
109 .ids = dasd_eckd_ids,
110 .probe = dasd_eckd_probe,
111 .remove = dasd_generic_remove,
112 .set_offline = dasd_generic_set_offline,
113 .set_online = dasd_eckd_set_online,
114 .notify = dasd_generic_notify,
115};
116
117static const int sizes_trk0[] = { 28, 148, 84 };
118#define LABEL_SIZE 140
119
120static inline unsigned int
121round_up_multiple(unsigned int no, unsigned int mult)
122{
123 int rem = no % mult;
124 return (rem ? no - rem + mult : no);
125}
126
127static inline unsigned int
128ceil_quot(unsigned int d1, unsigned int d2)
129{
130 return (d1 + (d2 - 1)) / d2;
131}
132
133static inline int
134bytes_per_record(struct dasd_eckd_characteristics *rdc, int kl, int dl)
135{
136 unsigned int fl1, fl2, int1, int2;
137 int bpr;
138
139 switch (rdc->formula) {
140 case 0x01:
141 fl1 = round_up_multiple(ECKD_F2(rdc) + dl, ECKD_F1(rdc));
142 fl2 = round_up_multiple(kl ? ECKD_F2(rdc) + kl : 0,
143 ECKD_F1(rdc));
144 bpr = fl1 + fl2;
145 break;
146 case 0x02:
147 int1 = ceil_quot(dl + ECKD_F6(rdc), ECKD_F5(rdc) << 1);
148 int2 = ceil_quot(kl + ECKD_F6(rdc), ECKD_F5(rdc) << 1);
149 fl1 = round_up_multiple(ECKD_F1(rdc) * ECKD_F2(rdc) + dl +
150 ECKD_F6(rdc) + ECKD_F4(rdc) * int1,
151 ECKD_F1(rdc));
152 fl2 = round_up_multiple(ECKD_F1(rdc) * ECKD_F3(rdc) + kl +
153 ECKD_F6(rdc) + ECKD_F4(rdc) * int2,
154 ECKD_F1(rdc));
155 bpr = fl1 + fl2;
156 break;
157 default:
158 bpr = 0;
159 break;
160 }
161 return bpr;
162}
163
164static inline unsigned int
165bytes_per_track(struct dasd_eckd_characteristics *rdc)
166{
167 return *(unsigned int *) (rdc->byte_per_track) >> 8;
168}
169
170static inline unsigned int
171recs_per_track(struct dasd_eckd_characteristics * rdc,
172 unsigned int kl, unsigned int dl)
173{
174 int dn, kn;
175
176 switch (rdc->dev_type) {
177 case 0x3380:
178 if (kl)
179 return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) +
180 ceil_quot(dl + 12, 32));
181 else
182 return 1499 / (15 + ceil_quot(dl + 12, 32));
183 case 0x3390:
184 dn = ceil_quot(dl + 6, 232) + 1;
185 if (kl) {
186 kn = ceil_quot(kl + 6, 232) + 1;
187 return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) +
188 9 + ceil_quot(dl + 6 * dn, 34));
189 } else
190 return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34));
191 case 0x9345:
192 dn = ceil_quot(dl + 6, 232) + 1;
193 if (kl) {
194 kn = ceil_quot(kl + 6, 232) + 1;
195 return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) +
196 ceil_quot(dl + 6 * dn, 34));
197 } else
198 return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34));
199 }
200 return 0;
201}
202
203static inline void
204check_XRC (struct ccw1 *de_ccw,
205 struct DE_eckd_data *data,
206 struct dasd_device *device)
207{
208 struct dasd_eckd_private *private;
209
210 private = (struct dasd_eckd_private *) device->private;
211
212 /* switch on System Time Stamp - needed for XRC Support */
213 if (private->rdc_data.facilities.XRC_supported) {
214
215 data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */
216 data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */
217
218 data->ep_sys_time = get_clock ();
219
220 de_ccw->count = sizeof (struct DE_eckd_data);
221 de_ccw->flags |= CCW_FLAG_SLI;
222 }
223
224 return;
225
226} /* end check_XRC */
227
228static inline void
229define_extent(struct ccw1 * ccw, struct DE_eckd_data * data, int trk,
230 int totrk, int cmd, struct dasd_device * device)
231{
232 struct dasd_eckd_private *private;
233 struct ch_t geo, beg, end;
234
235 private = (struct dasd_eckd_private *) device->private;
236
237 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT;
238 ccw->flags = 0;
239 ccw->count = 16;
240 ccw->cda = (__u32) __pa(data);
241
242 memset(data, 0, sizeof (struct DE_eckd_data));
243 switch (cmd) {
244 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
245 case DASD_ECKD_CCW_READ_RECORD_ZERO:
246 case DASD_ECKD_CCW_READ:
247 case DASD_ECKD_CCW_READ_MT:
248 case DASD_ECKD_CCW_READ_CKD:
249 case DASD_ECKD_CCW_READ_CKD_MT:
250 case DASD_ECKD_CCW_READ_KD:
251 case DASD_ECKD_CCW_READ_KD_MT:
252 case DASD_ECKD_CCW_READ_COUNT:
253 data->mask.perm = 0x1;
254 data->attributes.operation = private->attrib.operation;
255 break;
256 case DASD_ECKD_CCW_WRITE:
257 case DASD_ECKD_CCW_WRITE_MT:
258 case DASD_ECKD_CCW_WRITE_KD:
259 case DASD_ECKD_CCW_WRITE_KD_MT:
260 data->mask.perm = 0x02;
261 data->attributes.operation = private->attrib.operation;
262 check_XRC (ccw, data, device);
263 break;
264 case DASD_ECKD_CCW_WRITE_CKD:
265 case DASD_ECKD_CCW_WRITE_CKD_MT:
266 data->attributes.operation = DASD_BYPASS_CACHE;
267 check_XRC (ccw, data, device);
268 break;
269 case DASD_ECKD_CCW_ERASE:
270 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
271 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
272 data->mask.perm = 0x3;
273 data->mask.auth = 0x1;
274 data->attributes.operation = DASD_BYPASS_CACHE;
275 check_XRC (ccw, data, device);
276 break;
277 default:
278 DEV_MESSAGE(KERN_ERR, device, "unknown opcode 0x%x", cmd);
279 break;
280 }
281
282 data->attributes.mode = 0x3; /* ECKD */
283
284 if ((private->rdc_data.cu_type == 0x2105 ||
285 private->rdc_data.cu_type == 0x2107 ||
286 private->rdc_data.cu_type == 0x1750)
287 && !(private->uses_cdl && trk < 2))
288 data->ga_extended |= 0x40; /* Regular Data Format Mode */
289
290 geo.cyl = private->rdc_data.no_cyl;
291 geo.head = private->rdc_data.trk_per_cyl;
292 beg.cyl = trk / geo.head;
293 beg.head = trk % geo.head;
294 end.cyl = totrk / geo.head;
295 end.head = totrk % geo.head;
296
297 /* check for sequential prestage - enhance cylinder range */
298 if (data->attributes.operation == DASD_SEQ_PRESTAGE ||
299 data->attributes.operation == DASD_SEQ_ACCESS) {
300
301 if (end.cyl + private->attrib.nr_cyl < geo.cyl)
302 end.cyl += private->attrib.nr_cyl;
303 else
304 end.cyl = (geo.cyl - 1);
305 }
306
307 data->beg_ext.cyl = beg.cyl;
308 data->beg_ext.head = beg.head;
309 data->end_ext.cyl = end.cyl;
310 data->end_ext.head = end.head;
311}
312
313static inline void
314locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, int trk,
315 int rec_on_trk, int no_rec, int cmd,
316 struct dasd_device * device, int reclen)
317{
318 struct dasd_eckd_private *private;
319 int sector;
320 int dn, d;
321
322 private = (struct dasd_eckd_private *) device->private;
323
324 DBF_DEV_EVENT(DBF_INFO, device,
325 "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d",
326 trk, rec_on_trk, no_rec, cmd, reclen);
327
328 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD;
329 ccw->flags = 0;
330 ccw->count = 16;
331 ccw->cda = (__u32) __pa(data);
332
333 memset(data, 0, sizeof (struct LO_eckd_data));
334 sector = 0;
335 if (rec_on_trk) {
336 switch (private->rdc_data.dev_type) {
337 case 0x3390:
338 dn = ceil_quot(reclen + 6, 232);
339 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
340 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
341 break;
342 case 0x3380:
343 d = 7 + ceil_quot(reclen + 12, 32);
344 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
345 break;
346 }
347 }
348 data->sector = sector;
349 data->count = no_rec;
350 switch (cmd) {
351 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
352 data->operation.orientation = 0x3;
353 data->operation.operation = 0x03;
354 break;
355 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
356 data->operation.orientation = 0x3;
357 data->operation.operation = 0x16;
358 break;
359 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
360 data->operation.orientation = 0x1;
361 data->operation.operation = 0x03;
362 data->count++;
363 break;
364 case DASD_ECKD_CCW_READ_RECORD_ZERO:
365 data->operation.orientation = 0x3;
366 data->operation.operation = 0x16;
367 data->count++;
368 break;
369 case DASD_ECKD_CCW_WRITE:
370 case DASD_ECKD_CCW_WRITE_MT:
371 case DASD_ECKD_CCW_WRITE_KD:
372 case DASD_ECKD_CCW_WRITE_KD_MT:
373 data->auxiliary.last_bytes_used = 0x1;
374 data->length = reclen;
375 data->operation.operation = 0x01;
376 break;
377 case DASD_ECKD_CCW_WRITE_CKD:
378 case DASD_ECKD_CCW_WRITE_CKD_MT:
379 data->auxiliary.last_bytes_used = 0x1;
380 data->length = reclen;
381 data->operation.operation = 0x03;
382 break;
383 case DASD_ECKD_CCW_READ:
384 case DASD_ECKD_CCW_READ_MT:
385 case DASD_ECKD_CCW_READ_KD:
386 case DASD_ECKD_CCW_READ_KD_MT:
387 data->auxiliary.last_bytes_used = 0x1;
388 data->length = reclen;
389 data->operation.operation = 0x06;
390 break;
391 case DASD_ECKD_CCW_READ_CKD:
392 case DASD_ECKD_CCW_READ_CKD_MT:
393 data->auxiliary.last_bytes_used = 0x1;
394 data->length = reclen;
395 data->operation.operation = 0x16;
396 break;
397 case DASD_ECKD_CCW_READ_COUNT:
398 data->operation.operation = 0x06;
399 break;
400 case DASD_ECKD_CCW_ERASE:
401 data->length = reclen;
402 data->auxiliary.last_bytes_used = 0x1;
403 data->operation.operation = 0x0b;
404 break;
405 default:
406 DEV_MESSAGE(KERN_ERR, device, "unknown opcode 0x%x", cmd);
407 }
408 data->seek_addr.cyl = data->search_arg.cyl =
409 trk / private->rdc_data.trk_per_cyl;
410 data->seek_addr.head = data->search_arg.head =
411 trk % private->rdc_data.trk_per_cyl;
412 data->search_arg.record = rec_on_trk;
413}
414
415/*
416 * Returns 1 if the block is one of the special blocks that needs
417 * to get read/written with the KD variant of the command.
418 * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and
419 * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT.
420 * Luckily the KD variants differ only by one bit (0x08) from the
421 * normal variant. So don't wonder about code like:
422 * if (dasd_eckd_cdl_special(blk_per_trk, recid))
423 * ccw->cmd_code |= 0x8;
424 */
425static inline int
426dasd_eckd_cdl_special(int blk_per_trk, int recid)
427{
428 if (recid < 3)
429 return 1;
430 if (recid < blk_per_trk)
431 return 0;
432 if (recid < 2 * blk_per_trk)
433 return 1;
434 return 0;
435}
436
437/*
438 * Returns the record size for the special blocks of the cdl format.
439 * Only returns something useful if dasd_eckd_cdl_special is true
440 * for the recid.
441 */
442static inline int
443dasd_eckd_cdl_reclen(int recid)
444{
445 if (recid < 3)
446 return sizes_trk0[recid];
447 return LABEL_SIZE;
448}
449
450static int
451dasd_eckd_read_conf(struct dasd_device *device)
452{
453 void *conf_data;
454 int conf_len, conf_data_saved;
455 int rc;
456 __u8 lpm;
457 struct dasd_eckd_private *private;
458 struct dasd_eckd_path *path_data;
459
460 private = (struct dasd_eckd_private *) device->private;
461 path_data = (struct dasd_eckd_path *) &private->path_data;
462 path_data->opm = ccw_device_get_path_mask(device->cdev);
463 lpm = 0x80;
464 conf_data_saved = 0;
465
466 /* get configuration data per operational path */
467 for (lpm = 0x80; lpm; lpm>>= 1) {
468 if (lpm & path_data->opm){
469 rc = read_conf_data_lpm(device->cdev, &conf_data,
470 &conf_len, lpm);
471 if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */
472 MESSAGE(KERN_WARNING,
473 "Read configuration data returned "
474 "error %d", rc);
475 return rc;
476 }
477 if (conf_data == NULL) {
478 MESSAGE(KERN_WARNING, "%s", "No configuration "
479 "data retrieved");
480 continue; /* no errror */
481 }
482 if (conf_len != sizeof (struct dasd_eckd_confdata)) {
483 MESSAGE(KERN_WARNING,
484 "sizes of configuration data mismatch"
485 "%d (read) vs %ld (expected)",
486 conf_len,
487 sizeof (struct dasd_eckd_confdata));
488 kfree(conf_data);
489 continue; /* no errror */
490 }
491 /* save first valid configuration data */
492 if (!conf_data_saved){
493 memcpy(&private->conf_data, conf_data,
494 sizeof (struct dasd_eckd_confdata));
495 conf_data_saved++;
496 }
497 switch (((char *)conf_data)[242] & 0x07){
498 case 0x02:
499 path_data->npm |= lpm;
500 break;
501 case 0x03:
502 path_data->ppm |= lpm;
503 break;
504 }
505 kfree(conf_data);
506 }
507 }
508 return 0;
509}
510
511
512static int
513dasd_eckd_check_characteristics(struct dasd_device *device)
514{
515 struct dasd_eckd_private *private;
516 void *rdc_data;
517 int rc;
518
519 private = (struct dasd_eckd_private *) device->private;
520 if (private == NULL) {
521 private = kmalloc(sizeof(struct dasd_eckd_private),
522 GFP_KERNEL | GFP_DMA);
523 if (private == NULL) {
524 DEV_MESSAGE(KERN_WARNING, device, "%s",
525 "memory allocation failed for private "
526 "data");
527 return -ENOMEM;
528 }
529 memset(private, 0, sizeof(struct dasd_eckd_private));
530 device->private = (void *) private;
531 }
532 /* Invalidate status of initial analysis. */
533 private->init_cqr_status = -1;
534 /* Set default cache operations. */
535 private->attrib.operation = DASD_NORMAL_CACHE;
536 private->attrib.nr_cyl = 0;
537
538 /* Read Device Characteristics */
539 rdc_data = (void *) &(private->rdc_data);
540 rc = read_dev_chars(device->cdev, &rdc_data, 64);
541 if (rc) {
542 DEV_MESSAGE(KERN_WARNING, device,
543 "Read device characteristics returned error %d",
544 rc);
545 return rc;
546 }
547
548 DEV_MESSAGE(KERN_INFO, device,
549 "%04X/%02X(CU:%04X/%02X) Cyl:%d Head:%d Sec:%d",
550 private->rdc_data.dev_type,
551 private->rdc_data.dev_model,
552 private->rdc_data.cu_type,
553 private->rdc_data.cu_model.model,
554 private->rdc_data.no_cyl,
555 private->rdc_data.trk_per_cyl,
556 private->rdc_data.sec_per_trk);
557
558 /* Read Configuration Data */
559 rc = dasd_eckd_read_conf (device);
560 return rc;
561
562}
563
564static struct dasd_ccw_req *
565dasd_eckd_analysis_ccw(struct dasd_device *device)
566{
567 struct dasd_eckd_private *private;
568 struct eckd_count *count_data;
569 struct LO_eckd_data *LO_data;
570 struct dasd_ccw_req *cqr;
571 struct ccw1 *ccw;
572 int cplength, datasize;
573 int i;
574
575 private = (struct dasd_eckd_private *) device->private;
576
577 cplength = 8;
578 datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data);
579 cqr = dasd_smalloc_request(dasd_eckd_discipline.name,
580 cplength, datasize, device);
581 if (IS_ERR(cqr))
582 return cqr;
583 ccw = cqr->cpaddr;
584 /* Define extent for the first 3 tracks. */
585 define_extent(ccw++, cqr->data, 0, 2,
586 DASD_ECKD_CCW_READ_COUNT, device);
587 LO_data = cqr->data + sizeof (struct DE_eckd_data);
588 /* Locate record for the first 4 records on track 0. */
589 ccw[-1].flags |= CCW_FLAG_CC;
590 locate_record(ccw++, LO_data++, 0, 0, 4,
591 DASD_ECKD_CCW_READ_COUNT, device, 0);
592
593 count_data = private->count_area;
594 for (i = 0; i < 4; i++) {
595 ccw[-1].flags |= CCW_FLAG_CC;
596 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
597 ccw->flags = 0;
598 ccw->count = 8;
599 ccw->cda = (__u32)(addr_t) count_data;
600 ccw++;
601 count_data++;
602 }
603
604 /* Locate record for the first record on track 2. */
605 ccw[-1].flags |= CCW_FLAG_CC;
606 locate_record(ccw++, LO_data++, 2, 0, 1,
607 DASD_ECKD_CCW_READ_COUNT, device, 0);
608 /* Read count ccw. */
609 ccw[-1].flags |= CCW_FLAG_CC;
610 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
611 ccw->flags = 0;
612 ccw->count = 8;
613 ccw->cda = (__u32)(addr_t) count_data;
614
615 cqr->device = device;
616 cqr->retries = 0;
617 cqr->buildclk = get_clock();
618 cqr->status = DASD_CQR_FILLED;
619 return cqr;
620}
621
622/*
623 * This is the callback function for the init_analysis cqr. It saves
624 * the status of the initial analysis ccw before it frees it and kicks
625 * the device to continue the startup sequence. This will call
626 * dasd_eckd_do_analysis again (if the devices has not been marked
627 * for deletion in the meantime).
628 */
629static void
630dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, void *data)
631{
632 struct dasd_eckd_private *private;
633 struct dasd_device *device;
634
635 device = init_cqr->device;
636 private = (struct dasd_eckd_private *) device->private;
637 private->init_cqr_status = init_cqr->status;
638 dasd_sfree_request(init_cqr, device);
639 dasd_kick_device(device);
640}
641
642static int
643dasd_eckd_start_analysis(struct dasd_device *device)
644{
645 struct dasd_eckd_private *private;
646 struct dasd_ccw_req *init_cqr;
647
648 private = (struct dasd_eckd_private *) device->private;
649 init_cqr = dasd_eckd_analysis_ccw(device);
650 if (IS_ERR(init_cqr))
651 return PTR_ERR(init_cqr);
652 init_cqr->callback = dasd_eckd_analysis_callback;
653 init_cqr->callback_data = NULL;
654 init_cqr->expires = 5*HZ;
655 dasd_add_request_head(init_cqr);
656 return -EAGAIN;
657}
658
659static int
660dasd_eckd_end_analysis(struct dasd_device *device)
661{
662 struct dasd_eckd_private *private;
663 struct eckd_count *count_area;
664 unsigned int sb, blk_per_trk;
665 int status, i;
666
667 private = (struct dasd_eckd_private *) device->private;
668 status = private->init_cqr_status;
669 private->init_cqr_status = -1;
670 if (status != DASD_CQR_DONE) {
671 DEV_MESSAGE(KERN_WARNING, device, "%s",
672 "volume analysis returned unformatted disk");
673 return -EMEDIUMTYPE;
674 }
675
676 private->uses_cdl = 1;
677 /* Calculate number of blocks/records per track. */
678 blk_per_trk = recs_per_track(&private->rdc_data, 0, device->bp_block);
679 /* Check Track 0 for Compatible Disk Layout */
680 count_area = NULL;
681 for (i = 0; i < 3; i++) {
682 if (private->count_area[i].kl != 4 ||
683 private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4) {
684 private->uses_cdl = 0;
685 break;
686 }
687 }
688 if (i == 3)
689 count_area = &private->count_area[4];
690
691 if (private->uses_cdl == 0) {
692 for (i = 0; i < 5; i++) {
693 if ((private->count_area[i].kl != 0) ||
694 (private->count_area[i].dl !=
695 private->count_area[0].dl))
696 break;
697 }
698 if (i == 5)
699 count_area = &private->count_area[0];
700 } else {
701 if (private->count_area[3].record == 1)
702 DEV_MESSAGE(KERN_WARNING, device, "%s",
703 "Trk 0: no records after VTOC!");
704 }
705 if (count_area != NULL && count_area->kl == 0) {
706 /* we found notthing violating our disk layout */
707 if (dasd_check_blocksize(count_area->dl) == 0)
708 device->bp_block = count_area->dl;
709 }
710 if (device->bp_block == 0) {
711 DEV_MESSAGE(KERN_WARNING, device, "%s",
712 "Volume has incompatible disk layout");
713 return -EMEDIUMTYPE;
714 }
715 device->s2b_shift = 0; /* bits to shift 512 to get a block */
716 for (sb = 512; sb < device->bp_block; sb = sb << 1)
717 device->s2b_shift++;
718
719 blk_per_trk = recs_per_track(&private->rdc_data, 0, device->bp_block);
720 device->blocks = (private->rdc_data.no_cyl *
721 private->rdc_data.trk_per_cyl *
722 blk_per_trk);
723
724 DEV_MESSAGE(KERN_INFO, device,
725 "(%dkB blks): %dkB at %dkB/trk %s",
726 (device->bp_block >> 10),
727 ((private->rdc_data.no_cyl *
728 private->rdc_data.trk_per_cyl *
729 blk_per_trk * (device->bp_block >> 9)) >> 1),
730 ((blk_per_trk * device->bp_block) >> 10),
731 private->uses_cdl ?
732 "compatible disk layout" : "linux disk layout");
733
734 return 0;
735}
736
737static int
738dasd_eckd_do_analysis(struct dasd_device *device)
739{
740 struct dasd_eckd_private *private;
741
742 private = (struct dasd_eckd_private *) device->private;
743 if (private->init_cqr_status < 0)
744 return dasd_eckd_start_analysis(device);
745 else
746 return dasd_eckd_end_analysis(device);
747}
748
749static int
750dasd_eckd_fill_geometry(struct dasd_device *device, struct hd_geometry *geo)
751{
752 struct dasd_eckd_private *private;
753
754 private = (struct dasd_eckd_private *) device->private;
755 if (dasd_check_blocksize(device->bp_block) == 0) {
756 geo->sectors = recs_per_track(&private->rdc_data,
757 0, device->bp_block);
758 }
759 geo->cylinders = private->rdc_data.no_cyl;
760 geo->heads = private->rdc_data.trk_per_cyl;
761 return 0;
762}
763
764static struct dasd_ccw_req *
765dasd_eckd_format_device(struct dasd_device * device,
766 struct format_data_t * fdata)
767{
768 struct dasd_eckd_private *private;
769 struct dasd_ccw_req *fcp;
770 struct eckd_count *ect;
771 struct ccw1 *ccw;
772 void *data;
773 int rpt, cyl, head;
774 int cplength, datasize;
775 int i;
776
777 private = (struct dasd_eckd_private *) device->private;
778 rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize);
779 cyl = fdata->start_unit / private->rdc_data.trk_per_cyl;
780 head = fdata->start_unit % private->rdc_data.trk_per_cyl;
781
782 /* Sanity checks. */
783 if (fdata->start_unit >=
784 (private->rdc_data.no_cyl * private->rdc_data.trk_per_cyl)) {
785 DEV_MESSAGE(KERN_INFO, device, "Track no %d too big!",
786 fdata->start_unit);
787 return ERR_PTR(-EINVAL);
788 }
789 if (fdata->start_unit > fdata->stop_unit) {
790 DEV_MESSAGE(KERN_INFO, device, "Track %d reached! ending.",
791 fdata->start_unit);
792 return ERR_PTR(-EINVAL);
793 }
794 if (dasd_check_blocksize(fdata->blksize) != 0) {
795 DEV_MESSAGE(KERN_WARNING, device,
796 "Invalid blocksize %d...terminating!",
797 fdata->blksize);
798 return ERR_PTR(-EINVAL);
799 }
800
801 /*
802 * fdata->intensity is a bit string that tells us what to do:
803 * Bit 0: write record zero
804 * Bit 1: write home address, currently not supported
805 * Bit 2: invalidate tracks
806 * Bit 3: use OS/390 compatible disk layout (cdl)
807 * Only some bit combinations do make sense.
808 */
809 switch (fdata->intensity) {
810 case 0x00: /* Normal format */
811 case 0x08: /* Normal format, use cdl. */
812 cplength = 2 + rpt;
813 datasize = sizeof(struct DE_eckd_data) +
814 sizeof(struct LO_eckd_data) +
815 rpt * sizeof(struct eckd_count);
816 break;
817 case 0x01: /* Write record zero and format track. */
818 case 0x09: /* Write record zero and format track, use cdl. */
819 cplength = 3 + rpt;
820 datasize = sizeof(struct DE_eckd_data) +
821 sizeof(struct LO_eckd_data) +
822 sizeof(struct eckd_count) +
823 rpt * sizeof(struct eckd_count);
824 break;
825 case 0x04: /* Invalidate track. */
826 case 0x0c: /* Invalidate track, use cdl. */
827 cplength = 3;
828 datasize = sizeof(struct DE_eckd_data) +
829 sizeof(struct LO_eckd_data) +
830 sizeof(struct eckd_count);
831 break;
832 default:
833 DEV_MESSAGE(KERN_WARNING, device, "Invalid flags 0x%x.",
834 fdata->intensity);
835 return ERR_PTR(-EINVAL);
836 }
837 /* Allocate the format ccw request. */
838 fcp = dasd_smalloc_request(dasd_eckd_discipline.name,
839 cplength, datasize, device);
840 if (IS_ERR(fcp))
841 return fcp;
842
843 data = fcp->data;
844 ccw = fcp->cpaddr;
845
846 switch (fdata->intensity & ~0x08) {
847 case 0x00: /* Normal format. */
848 define_extent(ccw++, (struct DE_eckd_data *) data,
849 fdata->start_unit, fdata->start_unit,
850 DASD_ECKD_CCW_WRITE_CKD, device);
851 data += sizeof(struct DE_eckd_data);
852 ccw[-1].flags |= CCW_FLAG_CC;
853 locate_record(ccw++, (struct LO_eckd_data *) data,
854 fdata->start_unit, 0, rpt,
855 DASD_ECKD_CCW_WRITE_CKD, device,
856 fdata->blksize);
857 data += sizeof(struct LO_eckd_data);
858 break;
859 case 0x01: /* Write record zero + format track. */
860 define_extent(ccw++, (struct DE_eckd_data *) data,
861 fdata->start_unit, fdata->start_unit,
862 DASD_ECKD_CCW_WRITE_RECORD_ZERO,
863 device);
864 data += sizeof(struct DE_eckd_data);
865 ccw[-1].flags |= CCW_FLAG_CC;
866 locate_record(ccw++, (struct LO_eckd_data *) data,
867 fdata->start_unit, 0, rpt + 1,
868 DASD_ECKD_CCW_WRITE_RECORD_ZERO, device,
869 device->bp_block);
870 data += sizeof(struct LO_eckd_data);
871 break;
872 case 0x04: /* Invalidate track. */
873 define_extent(ccw++, (struct DE_eckd_data *) data,
874 fdata->start_unit, fdata->start_unit,
875 DASD_ECKD_CCW_WRITE_CKD, device);
876 data += sizeof(struct DE_eckd_data);
877 ccw[-1].flags |= CCW_FLAG_CC;
878 locate_record(ccw++, (struct LO_eckd_data *) data,
879 fdata->start_unit, 0, 1,
880 DASD_ECKD_CCW_WRITE_CKD, device, 8);
881 data += sizeof(struct LO_eckd_data);
882 break;
883 }
884 if (fdata->intensity & 0x01) { /* write record zero */
885 ect = (struct eckd_count *) data;
886 data += sizeof(struct eckd_count);
887 ect->cyl = cyl;
888 ect->head = head;
889 ect->record = 0;
890 ect->kl = 0;
891 ect->dl = 8;
892 ccw[-1].flags |= CCW_FLAG_CC;
893 ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO;
894 ccw->flags = CCW_FLAG_SLI;
895 ccw->count = 8;
896 ccw->cda = (__u32)(addr_t) ect;
897 ccw++;
898 }
899 if ((fdata->intensity & ~0x08) & 0x04) { /* erase track */
900 ect = (struct eckd_count *) data;
901 data += sizeof(struct eckd_count);
902 ect->cyl = cyl;
903 ect->head = head;
904 ect->record = 1;
905 ect->kl = 0;
906 ect->dl = 0;
907 ccw[-1].flags |= CCW_FLAG_CC;
908 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD;
909 ccw->flags = CCW_FLAG_SLI;
910 ccw->count = 8;
911 ccw->cda = (__u32)(addr_t) ect;
912 } else { /* write remaining records */
913 for (i = 0; i < rpt; i++) {
914 ect = (struct eckd_count *) data;
915 data += sizeof(struct eckd_count);
916 ect->cyl = cyl;
917 ect->head = head;
918 ect->record = i + 1;
919 ect->kl = 0;
920 ect->dl = fdata->blksize;
921 /* Check for special tracks 0-1 when formatting CDL */
922 if ((fdata->intensity & 0x08) &&
923 fdata->start_unit == 0) {
924 if (i < 3) {
925 ect->kl = 4;
926 ect->dl = sizes_trk0[i] - 4;
927 }
928 }
929 if ((fdata->intensity & 0x08) &&
930 fdata->start_unit == 1) {
931 ect->kl = 44;
932 ect->dl = LABEL_SIZE - 44;
933 }
934 ccw[-1].flags |= CCW_FLAG_CC;
935 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD;
936 ccw->flags = CCW_FLAG_SLI;
937 ccw->count = 8;
938 ccw->cda = (__u32)(addr_t) ect;
939 ccw++;
940 }
941 }
942 fcp->device = device;
943 fcp->retries = 2; /* set retry counter to enable ERP */
944 fcp->buildclk = get_clock();
945 fcp->status = DASD_CQR_FILLED;
946 return fcp;
947}
948
949static dasd_era_t
950dasd_eckd_examine_error(struct dasd_ccw_req * cqr, struct irb * irb)
951{
952 struct dasd_device *device = (struct dasd_device *) cqr->device;
953 struct ccw_device *cdev = device->cdev;
954
955 if (irb->scsw.cstat == 0x00 &&
956 irb->scsw.dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END))
957 return dasd_era_none;
958
959 switch (cdev->id.cu_type) {
960 case 0x3990:
961 case 0x2105:
962 case 0x2107:
963 case 0x1750:
964 return dasd_3990_erp_examine(cqr, irb);
965 case 0x9343:
966 return dasd_9343_erp_examine(cqr, irb);
967 case 0x3880:
968 default:
969 DEV_MESSAGE(KERN_WARNING, device, "%s",
970 "default (unknown CU type) - RECOVERABLE return");
971 return dasd_era_recover;
972 }
973}
974
975static dasd_erp_fn_t
976dasd_eckd_erp_action(struct dasd_ccw_req * cqr)
977{
978 struct dasd_device *device = (struct dasd_device *) cqr->device;
979 struct ccw_device *cdev = device->cdev;
980
981 switch (cdev->id.cu_type) {
982 case 0x3990:
983 case 0x2105:
984 case 0x2107:
985 case 0x1750:
986 return dasd_3990_erp_action;
987 case 0x9343:
988 case 0x3880:
989 default:
990 return dasd_default_erp_action;
991 }
992}
993
994static dasd_erp_fn_t
995dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr)
996{
997 return dasd_default_erp_postaction;
998}
999
1000static struct dasd_ccw_req *
1001dasd_eckd_build_cp(struct dasd_device * device, struct request *req)
1002{
1003 struct dasd_eckd_private *private;
1004 unsigned long *idaws;
1005 struct LO_eckd_data *LO_data;
1006 struct dasd_ccw_req *cqr;
1007 struct ccw1 *ccw;
1008 struct bio *bio;
1009 struct bio_vec *bv;
1010 char *dst;
1011 unsigned int blksize, blk_per_trk, off;
1012 int count, cidaw, cplength, datasize;
1013 sector_t recid, first_rec, last_rec;
1014 sector_t first_trk, last_trk;
1015 unsigned int first_offs, last_offs;
1016 unsigned char cmd, rcmd;
1017 int i;
1018
1019 private = (struct dasd_eckd_private *) device->private;
1020 if (rq_data_dir(req) == READ)
1021 cmd = DASD_ECKD_CCW_READ_MT;
1022 else if (rq_data_dir(req) == WRITE)
1023 cmd = DASD_ECKD_CCW_WRITE_MT;
1024 else
1025 return ERR_PTR(-EINVAL);
1026 /* Calculate number of blocks/records per track. */
1027 blksize = device->bp_block;
1028 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
1029 /* Calculate record id of first and last block. */
1030 first_rec = first_trk = req->sector >> device->s2b_shift;
1031 first_offs = sector_div(first_trk, blk_per_trk);
1032 last_rec = last_trk =
1033 (req->sector + req->nr_sectors - 1) >> device->s2b_shift;
1034 last_offs = sector_div(last_trk, blk_per_trk);
1035 /* Check struct bio and count the number of blocks for the request. */
1036 count = 0;
1037 cidaw = 0;
1038 rq_for_each_bio(bio, req) {
1039 bio_for_each_segment(bv, bio, i) {
1040 if (bv->bv_len & (blksize - 1))
1041 /* Eckd can only do full blocks. */
1042 return ERR_PTR(-EINVAL);
1043 count += bv->bv_len >> (device->s2b_shift + 9);
1044#if defined(CONFIG_ARCH_S390X)
1045 if (idal_is_needed (page_address(bv->bv_page),
1046 bv->bv_len))
1047 cidaw += bv->bv_len >> (device->s2b_shift + 9);
1048#endif
1049 }
1050 }
1051 /* Paranoia. */
1052 if (count != last_rec - first_rec + 1)
1053 return ERR_PTR(-EINVAL);
1054 /* 1x define extent + 1x locate record + number of blocks */
1055 cplength = 2 + count;
1056 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */
1057 datasize = sizeof(struct DE_eckd_data) + sizeof(struct LO_eckd_data) +
1058 cidaw * sizeof(unsigned long);
1059 /* Find out the number of additional locate record ccws for cdl. */
1060 if (private->uses_cdl && first_rec < 2*blk_per_trk) {
1061 if (last_rec >= 2*blk_per_trk)
1062 count = 2*blk_per_trk - first_rec;
1063 cplength += count;
1064 datasize += count*sizeof(struct LO_eckd_data);
1065 }
1066 /* Allocate the ccw request. */
1067 cqr = dasd_smalloc_request(dasd_eckd_discipline.name,
1068 cplength, datasize, device);
1069 if (IS_ERR(cqr))
1070 return cqr;
1071 ccw = cqr->cpaddr;
1072 /* First ccw is define extent. */
1073 define_extent(ccw++, cqr->data, first_trk, last_trk, cmd, device);
1074 /* Build locate_record+read/write/ccws. */
1075 idaws = (unsigned long *) (cqr->data + sizeof(struct DE_eckd_data));
1076 LO_data = (struct LO_eckd_data *) (idaws + cidaw);
1077 recid = first_rec;
1078 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) {
1079 /* Only standard blocks so there is just one locate record. */
1080 ccw[-1].flags |= CCW_FLAG_CC;
1081 locate_record(ccw++, LO_data++, first_trk, first_offs + 1,
1082 last_rec - recid + 1, cmd, device, blksize);
1083 }
1084 rq_for_each_bio(bio, req) bio_for_each_segment(bv, bio, i) {
1085 dst = page_address(bv->bv_page) + bv->bv_offset;
1086 if (dasd_page_cache) {
1087 char *copy = kmem_cache_alloc(dasd_page_cache,
1088 SLAB_DMA | __GFP_NOWARN);
1089 if (copy && rq_data_dir(req) == WRITE)
1090 memcpy(copy + bv->bv_offset, dst, bv->bv_len);
1091 if (copy)
1092 dst = copy + bv->bv_offset;
1093 }
1094 for (off = 0; off < bv->bv_len; off += blksize) {
1095 sector_t trkid = recid;
1096 unsigned int recoffs = sector_div(trkid, blk_per_trk);
1097 rcmd = cmd;
1098 count = blksize;
1099 /* Locate record for cdl special block ? */
1100 if (private->uses_cdl && recid < 2*blk_per_trk) {
1101 if (dasd_eckd_cdl_special(blk_per_trk, recid)){
1102 rcmd |= 0x8;
1103 count = dasd_eckd_cdl_reclen(recid);
ec5883ab
HH		 1104 if (count < blksize &&
1105 rq_data_dir(req) == READ)
1da177e4
LT		 1106 memset(dst + count, 0xe5,
1107 blksize - count);
1108 }
1109 ccw[-1].flags |= CCW_FLAG_CC;
1110 locate_record(ccw++, LO_data++,
1111 trkid, recoffs + 1,
1112 1, rcmd, device, count);
1113 }
1114 /* Locate record for standard blocks ? */
1115 if (private->uses_cdl && recid == 2*blk_per_trk) {
1116 ccw[-1].flags |= CCW_FLAG_CC;
1117 locate_record(ccw++, LO_data++,
1118 trkid, recoffs + 1,
1119 last_rec - recid + 1,
1120 cmd, device, count);
1121 }
1122 /* Read/write ccw. */
1123 ccw[-1].flags |= CCW_FLAG_CC;
1124 ccw->cmd_code = rcmd;
1125 ccw->count = count;
1126 if (idal_is_needed(dst, blksize)) {
1127 ccw->cda = (__u32)(addr_t) idaws;
1128 ccw->flags = CCW_FLAG_IDA;
1129 idaws = idal_create_words(idaws, dst, blksize);
1130 } else {
1131 ccw->cda = (__u32)(addr_t) dst;
1132 ccw->flags = 0;
1133 }
1134 ccw++;
1135 dst += blksize;
1136 recid++;
1137 }
1138 }
1139 cqr->device = device;
1140 cqr->expires = 5 * 60 * HZ; /* 5 minutes */
1141 cqr->lpm = private->path_data.ppm;
1142 cqr->retries = 256;
1143 cqr->buildclk = get_clock();
1144 cqr->status = DASD_CQR_FILLED;
1145 return cqr;
1146}
1147
1148static int
1149dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req)
1150{
1151 struct dasd_eckd_private *private;
1152 struct ccw1 *ccw;
1153 struct bio *bio;
1154 struct bio_vec *bv;
1155 char *dst, *cda;
1156 unsigned int blksize, blk_per_trk, off;
1157 sector_t recid;
1158 int i, status;
1159
1160 if (!dasd_page_cache)
1161 goto out;
1162 private = (struct dasd_eckd_private *) cqr->device->private;
1163 blksize = cqr->device->bp_block;
1164 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
1165 recid = req->sector >> cqr->device->s2b_shift;
1166 ccw = cqr->cpaddr;
1167 /* Skip over define extent & locate record. */
1168 ccw++;
1169 if (private->uses_cdl == 0 || recid > 2*blk_per_trk)
1170 ccw++;
1171 rq_for_each_bio(bio, req) bio_for_each_segment(bv, bio, i) {
1172 dst = page_address(bv->bv_page) + bv->bv_offset;
1173 for (off = 0; off < bv->bv_len; off += blksize) {
1174 /* Skip locate record. */
1175 if (private->uses_cdl && recid <= 2*blk_per_trk)
1176 ccw++;
1177 if (dst) {
1178 if (ccw->flags & CCW_FLAG_IDA)
1179 cda = *((char **)((addr_t) ccw->cda));
1180 else
1181 cda = (char *)((addr_t) ccw->cda);
1182 if (dst != cda) {
1183 if (rq_data_dir(req) == READ)
1184 memcpy(dst, cda, bv->bv_len);
1185 kmem_cache_free(dasd_page_cache,
1186 (void *)((addr_t)cda & PAGE_MASK));
1187 }
1188 dst = NULL;
1189 }
1190 ccw++;
1191 recid++;
1192 }
1193 }
1194out:
1195 status = cqr->status == DASD_CQR_DONE;
1196 dasd_sfree_request(cqr, cqr->device);
1197 return status;
1198}
1199
1200static int
1201dasd_eckd_fill_info(struct dasd_device * device,
1202 struct dasd_information2_t * info)
1203{
1204 struct dasd_eckd_private *private;
1205
1206 private = (struct dasd_eckd_private *) device->private;
1207 info->label_block = 2;
1208 info->FBA_layout = private->uses_cdl ? 0 : 1;
1209 info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL;
1210 info->characteristics_size = sizeof(struct dasd_eckd_characteristics);
1211 memcpy(info->characteristics, &private->rdc_data,
1212 sizeof(struct dasd_eckd_characteristics));
1213 info->confdata_size = sizeof (struct dasd_eckd_confdata);
1214 memcpy(info->configuration_data, &private->conf_data,
1215 sizeof (struct dasd_eckd_confdata));
1216 return 0;
1217}
1218
1219/*
1220 * SECTION: ioctl functions for eckd devices.
1221 */
1222
1223/*
1224 * Release device ioctl.
1225 * Buils a channel programm to releases a prior reserved
1226 * (see dasd_eckd_reserve) device.
1227 */
1228static int
1229dasd_eckd_release(struct block_device *bdev, int no, long args)
1230{
1231 struct dasd_device *device;
1232 struct dasd_ccw_req *cqr;
1233 int rc;
1234
1235 if (!capable(CAP_SYS_ADMIN))
1236 return -EACCES;
1237
1238 device = bdev->bd_disk->private_data;
1239 if (device == NULL)
1240 return -ENODEV;
1241
1242 cqr = dasd_smalloc_request(dasd_eckd_discipline.name,
1243 1, 32, device);
1244 if (IS_ERR(cqr)) {
1245 DEV_MESSAGE(KERN_WARNING, device, "%s",
1246 "Could not allocate initialization request");
1247 return PTR_ERR(cqr);
1248 }
1249 cqr->cpaddr->cmd_code = DASD_ECKD_CCW_RELEASE;
1250 cqr->cpaddr->flags |= CCW_FLAG_SLI;
1251 cqr->cpaddr->count = 32;
1252 cqr->cpaddr->cda = (__u32)(addr_t) cqr->data;
1253 cqr->device = device;
1254 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1255 cqr->retries = 0;
1256 cqr->expires = 2 * HZ;
1257 cqr->buildclk = get_clock();
1258 cqr->status = DASD_CQR_FILLED;
1259
1260 rc = dasd_sleep_on_immediatly(cqr);
1261
1262 dasd_sfree_request(cqr, cqr->device);
1263 return rc;
1264}
1265
1266/*
1267 * Reserve device ioctl.
1268 * Options are set to 'synchronous wait for interrupt' and
1269 * 'timeout the request'. This leads to a terminate IO if
1270 * the interrupt is outstanding for a certain time.
1271 */
1272static int
1273dasd_eckd_reserve(struct block_device *bdev, int no, long args)
1274{
1275 struct dasd_device *device;
1276 struct dasd_ccw_req *cqr;
1277 int rc;
1278
1279 if (!capable(CAP_SYS_ADMIN))
1280 return -EACCES;
1281
1282 device = bdev->bd_disk->private_data;
1283 if (device == NULL)
1284 return -ENODEV;
1285
1286 cqr = dasd_smalloc_request(dasd_eckd_discipline.name,
1287 1, 32, device);
1288 if (IS_ERR(cqr)) {
1289 DEV_MESSAGE(KERN_WARNING, device, "%s",
1290 "Could not allocate initialization request");
1291 return PTR_ERR(cqr);
1292 }
1293 cqr->cpaddr->cmd_code = DASD_ECKD_CCW_RESERVE;
1294 cqr->cpaddr->flags |= CCW_FLAG_SLI;
1295 cqr->cpaddr->count = 32;
1296 cqr->cpaddr->cda = (__u32)(addr_t) cqr->data;
1297 cqr->device = device;
1298 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1299 cqr->retries = 0;
1300 cqr->expires = 2 * HZ;
1301 cqr->buildclk = get_clock();
1302 cqr->status = DASD_CQR_FILLED;
1303
1304 rc = dasd_sleep_on_immediatly(cqr);
1305
1306 dasd_sfree_request(cqr, cqr->device);
1307 return rc;
1308}
1309
1310/*
1311 * Steal lock ioctl - unconditional reserve device.
1312 * Buils a channel programm to break a device's reservation.
1313 * (unconditional reserve)
1314 */
1315static int
1316dasd_eckd_steal_lock(struct block_device *bdev, int no, long args)
1317{
1318 struct dasd_device *device;
1319 struct dasd_ccw_req *cqr;
1320 int rc;
1321
1322 if (!capable(CAP_SYS_ADMIN))
1323 return -EACCES;
1324
1325 device = bdev->bd_disk->private_data;
1326 if (device == NULL)
1327 return -ENODEV;
1328
1329 cqr = dasd_smalloc_request(dasd_eckd_discipline.name,
1330 1, 32, device);
1331 if (IS_ERR(cqr)) {
1332 DEV_MESSAGE(KERN_WARNING, device, "%s",
1333 "Could not allocate initialization request");
1334 return PTR_ERR(cqr);
1335 }
1336 cqr->cpaddr->cmd_code = DASD_ECKD_CCW_SLCK;
1337 cqr->cpaddr->flags |= CCW_FLAG_SLI;
1338 cqr->cpaddr->count = 32;
1339 cqr->cpaddr->cda = (__u32)(addr_t) cqr->data;
1340 cqr->device = device;
1341 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1342 cqr->retries = 0;
1343 cqr->expires = 2 * HZ;
1344 cqr->buildclk = get_clock();
1345 cqr->status = DASD_CQR_FILLED;
1346
1347 rc = dasd_sleep_on_immediatly(cqr);
1348
1349 dasd_sfree_request(cqr, cqr->device);
1350 return rc;
1351}
1352
1353/*
1354 * Read performance statistics
1355 */
1356static int
1357dasd_eckd_performance(struct block_device *bdev, int no, long args)
1358{
1359 struct dasd_device *device;
1360 struct dasd_psf_prssd_data *prssdp;
1361 struct dasd_rssd_perf_stats_t *stats;
1362 struct dasd_ccw_req *cqr;
1363 struct ccw1 *ccw;
1364 int rc;
1365
1366 device = bdev->bd_disk->private_data;
1367 if (device == NULL)
1368 return -ENODEV;
1369
1370 cqr = dasd_smalloc_request(dasd_eckd_discipline.name,
1371 1 /* PSF */ + 1 /* RSSD */ ,
1372 (sizeof (struct dasd_psf_prssd_data) +
1373 sizeof (struct dasd_rssd_perf_stats_t)),
1374 device);
1375 if (IS_ERR(cqr)) {
1376 DEV_MESSAGE(KERN_WARNING, device, "%s",
1377 "Could not allocate initialization request");
1378 return PTR_ERR(cqr);
1379 }
1380 cqr->device = device;
1381 cqr->retries = 0;
1382 cqr->expires = 10 * HZ;
1383
1384 /* Prepare for Read Subsystem Data */
1385 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
1386 memset(prssdp, 0, sizeof (struct dasd_psf_prssd_data));
1387 prssdp->order = PSF_ORDER_PRSSD;
1388 prssdp->suborder = 0x01; /* Perfomance Statistics */
1389 prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */
1390
1391 ccw = cqr->cpaddr;
1392 ccw->cmd_code = DASD_ECKD_CCW_PSF;
1393 ccw->count = sizeof (struct dasd_psf_prssd_data);
1394 ccw->flags |= CCW_FLAG_CC;
1395 ccw->cda = (__u32)(addr_t) prssdp;
1396
1397 /* Read Subsystem Data - Performance Statistics */
1398 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
1399 memset(stats, 0, sizeof (struct dasd_rssd_perf_stats_t));
1400
1401 ccw++;
1402 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
1403 ccw->count = sizeof (struct dasd_rssd_perf_stats_t);
1404 ccw->cda = (__u32)(addr_t) stats;
1405
1406 cqr->buildclk = get_clock();
1407 cqr->status = DASD_CQR_FILLED;
1408 rc = dasd_sleep_on(cqr);
1409 if (rc == 0) {
1410 /* Prepare for Read Subsystem Data */
1411 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
1412 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
1413 rc = copy_to_user((long __user *) args, (long *) stats,
1414 sizeof(struct dasd_rssd_perf_stats_t));
1415 }
1416 dasd_sfree_request(cqr, cqr->device);
1417 return rc;
1418}
1419
1420/*
1421 * Get attributes (cache operations)
1422 * Returnes the cache attributes used in Define Extend (DE).
1423 */
1424static int
1425dasd_eckd_get_attrib (struct block_device *bdev, int no, long args)
1426{
1427 struct dasd_device *device;
1428 struct dasd_eckd_private *private;
1429 struct attrib_data_t attrib;
1430 int rc;
1431
1432 if (!capable(CAP_SYS_ADMIN))
1433 return -EACCES;
1434 if (!args)
1435 return -EINVAL;
1436
1437 device = bdev->bd_disk->private_data;
1438 if (device == NULL)
1439 return -ENODEV;
1440
1441 private = (struct dasd_eckd_private *) device->private;
1442 attrib = private->attrib;
1443
1444 rc = copy_to_user((long __user *) args, (long *) &attrib,
1445 sizeof (struct attrib_data_t));
1446
1447 return rc;
1448}
1449
1450/*
1451 * Set attributes (cache operations)
1452 * Stores the attributes for cache operation to be used in Define Extend (DE).
1453 */
1454static int
1455dasd_eckd_set_attrib(struct block_device *bdev, int no, long args)
1456{
1457 struct dasd_device *device;
1458 struct dasd_eckd_private *private;
1459 struct attrib_data_t attrib;
1460
1461 if (!capable(CAP_SYS_ADMIN))
1462 return -EACCES;
1463 if (!args)
1464 return -EINVAL;
1465
1466 device = bdev->bd_disk->private_data;
1467 if (device == NULL)
1468 return -ENODEV;
1469
1470 if (copy_from_user(&attrib, (void __user *) args,
1471 sizeof (struct attrib_data_t))) {
1472 return -EFAULT;
1473 }
1474 private = (struct dasd_eckd_private *) device->private;
1475 private->attrib = attrib;
1476
1477 DEV_MESSAGE(KERN_INFO, device,
1478 "cache operation mode set to %x (%i cylinder prestage)",
1479 private->attrib.operation, private->attrib.nr_cyl);
1480 return 0;
1481}
1482
1483/*
1484 * Print sense data and related channel program.
1485 * Parts are printed because printk buffer is only 1024 bytes.
1486 */
1487static void
1488dasd_eckd_dump_sense(struct dasd_device *device, struct dasd_ccw_req * req,
1489 struct irb *irb)
1490{
1491 char *page;
1492 struct ccw1 *act, *end, *last;
1493 int len, sl, sct, count;
1494
1495 page = (char *) get_zeroed_page(GFP_ATOMIC);
1496 if (page == NULL) {
1497 DEV_MESSAGE(KERN_ERR, device, " %s",
1498 "No memory to dump sense data");
1499 return;
1500 }
1501 len = sprintf(page, KERN_ERR PRINTK_HEADER
1502 " I/O status report for device %s:\n",
1503 device->cdev->dev.bus_id);
1504 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
1505 " in req: %p CS: 0x%02X DS: 0x%02X\n", req,
1506 irb->scsw.cstat, irb->scsw.dstat);
1507 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
1508 " device %s: Failing CCW: %p\n",
1509 device->cdev->dev.bus_id,
1510 (void *) (addr_t) irb->scsw.cpa);
1511 if (irb->esw.esw0.erw.cons) {
1512 for (sl = 0; sl < 4; sl++) {
1513 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
1514 " Sense(hex) %2d-%2d:",
1515 (8 * sl), ((8 * sl) + 7));
1516
1517 for (sct = 0; sct < 8; sct++) {
1518 len += sprintf(page + len, " %02x",
1519 irb->ecw[8 * sl + sct]);
1520 }
1521 len += sprintf(page + len, "\n");
1522 }
1523
1524 if (irb->ecw[27] & DASD_SENSE_BIT_0) {
1525 /* 24 Byte Sense Data */
1526 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
1527 " 24 Byte: %x MSG %x, "
1528 "%s MSGb to SYSOP\n",
1529 irb->ecw[7] >> 4, irb->ecw[7] & 0x0f,
1530 irb->ecw[1] & 0x10 ? "" : "no");
1531 } else {
1532 /* 32 Byte Sense Data */
1533 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
1534 " 32 Byte: Format: %x "
1535 "Exception class %x\n",
1536 irb->ecw[6] & 0x0f, irb->ecw[22] >> 4);
1537 }
1538 } else {
1539 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
1540 " SORRY - NO VALID SENSE AVAILABLE\n");
1541 }
1542 MESSAGE_LOG(KERN_ERR, "%s",
1543 page + sizeof(KERN_ERR PRINTK_HEADER));
1544
1545 /* dump the Channel Program */
1546 /* print first CCWs (maximum 8) */
1547 act = req->cpaddr;
1548 for (last = act; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++);
1549 end = min(act + 8, last);
1550 len = sprintf(page, KERN_ERR PRINTK_HEADER
1551 " Related CP in req: %p\n", req);
1552 while (act <= end) {
1553 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
1554 " CCW %p: %08X %08X DAT:",
1555 act, ((int *) act)[0], ((int *) act)[1]);
1556 for (count = 0; count < 32 && count < act->count;
1557 count += sizeof(int))
1558 len += sprintf(page + len, " %08X",
1559 ((int *) (addr_t) act->cda)
1560 [(count>>2)]);
1561 len += sprintf(page + len, "\n");
1562 act++;
1563 }
1564 MESSAGE_LOG(KERN_ERR, "%s",
1565 page + sizeof(KERN_ERR PRINTK_HEADER));
1566
1567 /* print failing CCW area */
1568 len = 0;
1569 if (act < ((struct ccw1 *)(addr_t) irb->scsw.cpa) - 2) {
1570 act = ((struct ccw1 *)(addr_t) irb->scsw.cpa) - 2;
1571 len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n");
1572 }
1573 end = min((struct ccw1 *)(addr_t) irb->scsw.cpa + 2, last);
1574 while (act <= end) {
1575 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
1576 " CCW %p: %08X %08X DAT:",
1577 act, ((int *) act)[0], ((int *) act)[1]);
1578 for (count = 0; count < 32 && count < act->count;
1579 count += sizeof(int))
1580 len += sprintf(page + len, " %08X",
1581 ((int *) (addr_t) act->cda)
1582 [(count>>2)]);
1583 len += sprintf(page + len, "\n");
1584 act++;
1585 }
1586
1587 /* print last CCWs */
1588 if (act < last - 2) {
1589 act = last - 2;
1590 len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n");
1591 }
1592 while (act <= last) {
1593 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
1594 " CCW %p: %08X %08X DAT:",
1595 act, ((int *) act)[0], ((int *) act)[1]);
1596 for (count = 0; count < 32 && count < act->count;
1597 count += sizeof(int))
1598 len += sprintf(page + len, " %08X",
1599 ((int *) (addr_t) act->cda)
1600 [(count>>2)]);
1601 len += sprintf(page + len, "\n");
1602 act++;
1603 }
1604 if (len > 0)
1605 MESSAGE_LOG(KERN_ERR, "%s",
1606 page + sizeof(KERN_ERR PRINTK_HEADER));
1607 free_page((unsigned long) page);
1608}
1609
1610/*
1611 * max_blocks is dependent on the amount of storage that is available
1612 * in the static io buffer for each device. Currently each device has
1613 * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has
1614 * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use
1615 * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In
1616 * addition we have one define extent ccw + 16 bytes of data and one
1617 * locate record ccw + 16 bytes of data. That makes:
1618 * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum.
1619 * We want to fit two into the available memory so that we can immediately
1620 * start the next request if one finishes off. That makes 249.5 blocks
1621 * for one request. Give a little safety and the result is 240.
1622 */
1623static struct dasd_discipline dasd_eckd_discipline = {
1624 .owner = THIS_MODULE,
1625 .name = "ECKD",
1626 .ebcname = "ECKD",
1627 .max_blocks = 240,
1628 .check_device = dasd_eckd_check_characteristics,
1629 .do_analysis = dasd_eckd_do_analysis,
1630 .fill_geometry = dasd_eckd_fill_geometry,
1631 .start_IO = dasd_start_IO,
1632 .term_IO = dasd_term_IO,
1633 .format_device = dasd_eckd_format_device,
1634 .examine_error = dasd_eckd_examine_error,
1635 .erp_action = dasd_eckd_erp_action,
1636 .erp_postaction = dasd_eckd_erp_postaction,
1637 .build_cp = dasd_eckd_build_cp,
1638 .free_cp = dasd_eckd_free_cp,
1639 .dump_sense = dasd_eckd_dump_sense,
1640 .fill_info = dasd_eckd_fill_info,
1641};
1642
1643static int __init
1644dasd_eckd_init(void)
1645{
1646 int ret;
1647
1648 dasd_ioctl_no_register(THIS_MODULE, BIODASDGATTR,
1649 dasd_eckd_get_attrib);
1650 dasd_ioctl_no_register(THIS_MODULE, BIODASDSATTR,
1651 dasd_eckd_set_attrib);
1652 dasd_ioctl_no_register(THIS_MODULE, BIODASDPSRD,
1653 dasd_eckd_performance);
1654 dasd_ioctl_no_register(THIS_MODULE, BIODASDRLSE,
1655 dasd_eckd_release);
1656 dasd_ioctl_no_register(THIS_MODULE, BIODASDRSRV,
1657 dasd_eckd_reserve);
1658 dasd_ioctl_no_register(THIS_MODULE, BIODASDSLCK,
1659 dasd_eckd_steal_lock);
1660
1661 ASCEBC(dasd_eckd_discipline.ebcname, 4);
1662
1663 ret = ccw_driver_register(&dasd_eckd_driver);
1664 if (ret) {
1665 dasd_ioctl_no_unregister(THIS_MODULE, BIODASDGATTR,
1666 dasd_eckd_get_attrib);
1667 dasd_ioctl_no_unregister(THIS_MODULE, BIODASDSATTR,
1668 dasd_eckd_set_attrib);
1669 dasd_ioctl_no_unregister(THIS_MODULE, BIODASDPSRD,
1670 dasd_eckd_performance);
1671 dasd_ioctl_no_unregister(THIS_MODULE, BIODASDRLSE,
1672 dasd_eckd_release);
1673 dasd_ioctl_no_unregister(THIS_MODULE, BIODASDRSRV,
1674 dasd_eckd_reserve);
1675 dasd_ioctl_no_unregister(THIS_MODULE, BIODASDSLCK,
1676 dasd_eckd_steal_lock);
1677 return ret;
1678 }
1679
1680 dasd_generic_auto_online(&dasd_eckd_driver);
1681 return 0;
1682}
1683
1684static void __exit
1685dasd_eckd_cleanup(void)
1686{
1687 ccw_driver_unregister(&dasd_eckd_driver);
1688
1689 dasd_ioctl_no_unregister(THIS_MODULE, BIODASDGATTR,
1690 dasd_eckd_get_attrib);
1691 dasd_ioctl_no_unregister(THIS_MODULE, BIODASDSATTR,
1692 dasd_eckd_set_attrib);
1693 dasd_ioctl_no_unregister(THIS_MODULE, BIODASDPSRD,
1694 dasd_eckd_performance);
1695 dasd_ioctl_no_unregister(THIS_MODULE, BIODASDRLSE,
1696 dasd_eckd_release);
1697 dasd_ioctl_no_unregister(THIS_MODULE, BIODASDRSRV,
1698 dasd_eckd_reserve);
1699 dasd_ioctl_no_unregister(THIS_MODULE, BIODASDSLCK,
1700 dasd_eckd_steal_lock);
1701}
1702
1703module_init(dasd_eckd_init);
1704module_exit(dasd_eckd_cleanup);
1705
1706/*
1707 * Overrides for Emacs so that we follow Linus's tabbing style.
1708 * Emacs will notice this stuff at the end of the file and automatically
1709 * adjust the settings for this buffer only. This must remain at the end
1710 * of the file.
1711 * ---------------------------------------------------------------------------
1712 * Local variables:
1713 * c-indent-level: 4
1714 * c-brace-imaginary-offset: 0
1715 * c-brace-offset: -4
1716 * c-argdecl-indent: 4
1717 * c-label-offset: -4
1718 * c-continued-statement-offset: 4
1719 * c-continued-brace-offset: 0
1720 * indent-tabs-mode: 1
1721 * tab-width: 8
1722 * End:
1723 */
Linux kernel - Deliverables
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