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 * Copyright IBM Corp. 1999, 2009
9 * EMC Symmetrix ioctl Copyright EMC Corporation, 2008
10 * Author.........: Nigel Hislop <hislop_nigel@emc.com>
13 #define KMSG_COMPONENT "dasd-eckd"
15 #include <linux/stddef.h>
16 #include <linux/kernel.h>
17 #include <linux/slab.h>
18 #include <linux/hdreg.h> /* HDIO_GETGEO */
19 #include <linux/bio.h>
20 #include <linux/module.h>
21 #include <linux/init.h>
23 #include <asm/debug.h>
24 #include <asm/idals.h>
25 #include <asm/ebcdic.h>
27 #include <asm/uaccess.h>
29 #include <asm/ccwdev.h>
33 #include "dasd_eckd.h"
34 #include "../cio/chsc.h"
39 #endif /* PRINTK_HEADER */
40 #define PRINTK_HEADER "dasd(eckd):"
42 #define ECKD_C0(i) (i->home_bytes)
43 #define ECKD_F(i) (i->formula)
44 #define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\
45 (i->factors.f_0x02.f1))
46 #define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\
47 (i->factors.f_0x02.f2))
48 #define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\
49 (i->factors.f_0x02.f3))
50 #define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0)
51 #define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0)
52 #define ECKD_F6(i) (i->factor6)
53 #define ECKD_F7(i) (i->factor7)
54 #define ECKD_F8(i) (i->factor8)
56 MODULE_LICENSE("GPL");
58 static struct dasd_discipline dasd_eckd_discipline;
60 /* The ccw bus type uses this table to find devices that it sends to
62 static struct ccw_device_id dasd_eckd_ids[] = {
63 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1},
64 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2},
65 { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3390, 0), .driver_info = 0x3},
66 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4},
67 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5},
68 { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6},
69 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7},
70 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8},
71 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9},
72 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa},
73 { /* end of list */ },
76 MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids);
78 static struct ccw_driver dasd_eckd_driver; /* see below */
81 #define INIT_CQR_UNFORMATTED 1
82 #define INIT_CQR_ERROR 2
85 /* initial attempt at a probe function. this can be simplified once
86 * the other detection code is gone */
88 dasd_eckd_probe (struct ccw_device *cdev)
92 /* set ECKD specific ccw-device options */
93 ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE |
94 CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH);
96 DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s",
97 "dasd_eckd_probe: could not set "
98 "ccw-device options");
101 ret = dasd_generic_probe(cdev, &dasd_eckd_discipline);
106 dasd_eckd_set_online(struct ccw_device *cdev)
108 return dasd_generic_set_online(cdev, &dasd_eckd_discipline);
111 static const int sizes_trk0[] = { 28, 148, 84 };
112 #define LABEL_SIZE 140
114 static inline unsigned int
115 round_up_multiple(unsigned int no, unsigned int mult)
118 return (rem ? no - rem + mult : no);
121 static inline unsigned int
122 ceil_quot(unsigned int d1, unsigned int d2)
124 return (d1 + (d2 - 1)) / d2;
128 recs_per_track(struct dasd_eckd_characteristics * rdc,
129 unsigned int kl, unsigned int dl)
133 switch (rdc->dev_type) {
136 return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) +
137 ceil_quot(dl + 12, 32));
139 return 1499 / (15 + ceil_quot(dl + 12, 32));
141 dn = ceil_quot(dl + 6, 232) + 1;
143 kn = ceil_quot(kl + 6, 232) + 1;
144 return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) +
145 9 + ceil_quot(dl + 6 * dn, 34));
147 return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34));
149 dn = ceil_quot(dl + 6, 232) + 1;
151 kn = ceil_quot(kl + 6, 232) + 1;
152 return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) +
153 ceil_quot(dl + 6 * dn, 34));
155 return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34));
160 static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head)
162 geo->cyl = (__u16) cyl;
163 geo->head = cyl >> 16;
169 check_XRC (struct ccw1 *de_ccw,
170 struct DE_eckd_data *data,
171 struct dasd_device *device)
173 struct dasd_eckd_private *private;
176 private = (struct dasd_eckd_private *) device->private;
177 if (!private->rdc_data.facilities.XRC_supported)
180 /* switch on System Time Stamp - needed for XRC Support */
181 data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */
182 data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */
184 rc = get_sync_clock(&data->ep_sys_time);
185 /* Ignore return code if sync clock is switched off. */
186 if (rc == -ENOSYS || rc == -EACCES)
189 de_ccw->count = sizeof(struct DE_eckd_data);
190 de_ccw->flags |= CCW_FLAG_SLI;
195 define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk,
196 unsigned int totrk, int cmd, struct dasd_device *device)
198 struct dasd_eckd_private *private;
200 u16 heads, beghead, endhead;
203 private = (struct dasd_eckd_private *) device->private;
205 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT;
208 ccw->cda = (__u32) __pa(data);
210 memset(data, 0, sizeof(struct DE_eckd_data));
212 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
213 case DASD_ECKD_CCW_READ_RECORD_ZERO:
214 case DASD_ECKD_CCW_READ:
215 case DASD_ECKD_CCW_READ_MT:
216 case DASD_ECKD_CCW_READ_CKD:
217 case DASD_ECKD_CCW_READ_CKD_MT:
218 case DASD_ECKD_CCW_READ_KD:
219 case DASD_ECKD_CCW_READ_KD_MT:
220 case DASD_ECKD_CCW_READ_COUNT:
221 data->mask.perm = 0x1;
222 data->attributes.operation = private->attrib.operation;
224 case DASD_ECKD_CCW_WRITE:
225 case DASD_ECKD_CCW_WRITE_MT:
226 case DASD_ECKD_CCW_WRITE_KD:
227 case DASD_ECKD_CCW_WRITE_KD_MT:
228 data->mask.perm = 0x02;
229 data->attributes.operation = private->attrib.operation;
230 rc = check_XRC (ccw, data, device);
232 case DASD_ECKD_CCW_WRITE_CKD:
233 case DASD_ECKD_CCW_WRITE_CKD_MT:
234 data->attributes.operation = DASD_BYPASS_CACHE;
235 rc = check_XRC (ccw, data, device);
237 case DASD_ECKD_CCW_ERASE:
238 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
239 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
240 data->mask.perm = 0x3;
241 data->mask.auth = 0x1;
242 data->attributes.operation = DASD_BYPASS_CACHE;
243 rc = check_XRC (ccw, data, device);
246 dev_err(&device->cdev->dev,
247 "0x%x is not a known command\n", cmd);
251 data->attributes.mode = 0x3; /* ECKD */
253 if ((private->rdc_data.cu_type == 0x2105 ||
254 private->rdc_data.cu_type == 0x2107 ||
255 private->rdc_data.cu_type == 0x1750)
256 && !(private->uses_cdl && trk < 2))
257 data->ga_extended |= 0x40; /* Regular Data Format Mode */
259 heads = private->rdc_data.trk_per_cyl;
260 begcyl = trk / heads;
261 beghead = trk % heads;
262 endcyl = totrk / heads;
263 endhead = totrk % heads;
265 /* check for sequential prestage - enhance cylinder range */
266 if (data->attributes.operation == DASD_SEQ_PRESTAGE ||
267 data->attributes.operation == DASD_SEQ_ACCESS) {
269 if (endcyl + private->attrib.nr_cyl < private->real_cyl)
270 endcyl += private->attrib.nr_cyl;
272 endcyl = (private->real_cyl - 1);
275 set_ch_t(&data->beg_ext, begcyl, beghead);
276 set_ch_t(&data->end_ext, endcyl, endhead);
280 static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata,
281 struct dasd_device *device)
283 struct dasd_eckd_private *private;
286 private = (struct dasd_eckd_private *) device->private;
287 if (!private->rdc_data.facilities.XRC_supported)
290 /* switch on System Time Stamp - needed for XRC Support */
291 pfxdata->define_extent.ga_extended |= 0x08; /* 'Time Stamp Valid' */
292 pfxdata->define_extent.ga_extended |= 0x02; /* 'Extended Parameter' */
293 pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */
295 rc = get_sync_clock(&pfxdata->define_extent.ep_sys_time);
296 /* Ignore return code if sync clock is switched off. */
297 if (rc == -ENOSYS || rc == -EACCES)
302 static void fill_LRE_data(struct LRE_eckd_data *data, unsigned int trk,
303 unsigned int rec_on_trk, int count, int cmd,
304 struct dasd_device *device, unsigned int reclen,
307 struct dasd_eckd_private *private;
311 private = (struct dasd_eckd_private *) device->private;
313 memset(data, 0, sizeof(*data));
316 switch (private->rdc_data.dev_type) {
318 dn = ceil_quot(reclen + 6, 232);
319 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
320 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
323 d = 7 + ceil_quot(reclen + 12, 32);
324 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
328 data->sector = sector;
329 /* note: meaning of count depends on the operation
330 * for record based I/O it's the number of records, but for
331 * track based I/O it's the number of tracks
335 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
336 data->operation.orientation = 0x3;
337 data->operation.operation = 0x03;
339 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
340 data->operation.orientation = 0x3;
341 data->operation.operation = 0x16;
343 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
344 data->operation.orientation = 0x1;
345 data->operation.operation = 0x03;
348 case DASD_ECKD_CCW_READ_RECORD_ZERO:
349 data->operation.orientation = 0x3;
350 data->operation.operation = 0x16;
353 case DASD_ECKD_CCW_WRITE:
354 case DASD_ECKD_CCW_WRITE_MT:
355 case DASD_ECKD_CCW_WRITE_KD:
356 case DASD_ECKD_CCW_WRITE_KD_MT:
357 data->auxiliary.length_valid = 0x1;
358 data->length = reclen;
359 data->operation.operation = 0x01;
361 case DASD_ECKD_CCW_WRITE_CKD:
362 case DASD_ECKD_CCW_WRITE_CKD_MT:
363 data->auxiliary.length_valid = 0x1;
364 data->length = reclen;
365 data->operation.operation = 0x03;
367 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
368 data->auxiliary.length_valid = 0x1;
369 data->length = reclen; /* not tlf, as one might think */
370 data->operation.operation = 0x3F;
371 data->extended_operation = 0x23;
373 case DASD_ECKD_CCW_READ:
374 case DASD_ECKD_CCW_READ_MT:
375 case DASD_ECKD_CCW_READ_KD:
376 case DASD_ECKD_CCW_READ_KD_MT:
377 data->auxiliary.length_valid = 0x1;
378 data->length = reclen;
379 data->operation.operation = 0x06;
381 case DASD_ECKD_CCW_READ_CKD:
382 case DASD_ECKD_CCW_READ_CKD_MT:
383 data->auxiliary.length_valid = 0x1;
384 data->length = reclen;
385 data->operation.operation = 0x16;
387 case DASD_ECKD_CCW_READ_COUNT:
388 data->operation.operation = 0x06;
390 case DASD_ECKD_CCW_READ_TRACK_DATA:
391 data->auxiliary.length_valid = 0x1;
393 data->operation.operation = 0x0C;
395 case DASD_ECKD_CCW_ERASE:
396 data->length = reclen;
397 data->auxiliary.length_valid = 0x1;
398 data->operation.operation = 0x0b;
401 DBF_DEV_EVENT(DBF_ERR, device,
402 "fill LRE unknown opcode 0x%x", cmd);
405 set_ch_t(&data->seek_addr,
406 trk / private->rdc_data.trk_per_cyl,
407 trk % private->rdc_data.trk_per_cyl);
408 data->search_arg.cyl = data->seek_addr.cyl;
409 data->search_arg.head = data->seek_addr.head;
410 data->search_arg.record = rec_on_trk;
413 static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
414 unsigned int trk, unsigned int totrk, int cmd,
415 struct dasd_device *basedev, struct dasd_device *startdev,
416 unsigned char format, unsigned int rec_on_trk, int count,
417 unsigned int blksize, unsigned int tlf)
419 struct dasd_eckd_private *basepriv, *startpriv;
420 struct DE_eckd_data *dedata;
421 struct LRE_eckd_data *lredata;
423 u16 heads, beghead, endhead;
426 basepriv = (struct dasd_eckd_private *) basedev->private;
427 startpriv = (struct dasd_eckd_private *) startdev->private;
428 dedata = &pfxdata->define_extent;
429 lredata = &pfxdata->locate_record;
431 ccw->cmd_code = DASD_ECKD_CCW_PFX;
433 ccw->count = sizeof(*pfxdata);
434 ccw->cda = (__u32) __pa(pfxdata);
436 memset(pfxdata, 0, sizeof(*pfxdata));
439 DBF_DEV_EVENT(DBF_ERR, basedev,
440 "PFX LRE unknown format 0x%x", format);
444 pfxdata->format = format;
445 pfxdata->base_address = basepriv->ned->unit_addr;
446 pfxdata->base_lss = basepriv->ned->ID;
447 pfxdata->validity.define_extent = 1;
449 /* private uid is kept up to date, conf_data may be outdated */
450 if (startpriv->uid.type != UA_BASE_DEVICE) {
451 pfxdata->validity.verify_base = 1;
452 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS)
453 pfxdata->validity.hyper_pav = 1;
456 /* define extend data (mostly)*/
458 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
459 case DASD_ECKD_CCW_READ_RECORD_ZERO:
460 case DASD_ECKD_CCW_READ:
461 case DASD_ECKD_CCW_READ_MT:
462 case DASD_ECKD_CCW_READ_CKD:
463 case DASD_ECKD_CCW_READ_CKD_MT:
464 case DASD_ECKD_CCW_READ_KD:
465 case DASD_ECKD_CCW_READ_KD_MT:
466 case DASD_ECKD_CCW_READ_COUNT:
467 dedata->mask.perm = 0x1;
468 dedata->attributes.operation = basepriv->attrib.operation;
470 case DASD_ECKD_CCW_READ_TRACK_DATA:
471 dedata->mask.perm = 0x1;
472 dedata->attributes.operation = basepriv->attrib.operation;
473 dedata->blk_size = 0;
475 case DASD_ECKD_CCW_WRITE:
476 case DASD_ECKD_CCW_WRITE_MT:
477 case DASD_ECKD_CCW_WRITE_KD:
478 case DASD_ECKD_CCW_WRITE_KD_MT:
479 dedata->mask.perm = 0x02;
480 dedata->attributes.operation = basepriv->attrib.operation;
481 rc = check_XRC_on_prefix(pfxdata, basedev);
483 case DASD_ECKD_CCW_WRITE_CKD:
484 case DASD_ECKD_CCW_WRITE_CKD_MT:
485 dedata->attributes.operation = DASD_BYPASS_CACHE;
486 rc = check_XRC_on_prefix(pfxdata, basedev);
488 case DASD_ECKD_CCW_ERASE:
489 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
490 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
491 dedata->mask.perm = 0x3;
492 dedata->mask.auth = 0x1;
493 dedata->attributes.operation = DASD_BYPASS_CACHE;
494 rc = check_XRC_on_prefix(pfxdata, basedev);
496 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
497 dedata->mask.perm = 0x02;
498 dedata->attributes.operation = basepriv->attrib.operation;
499 dedata->blk_size = blksize;
500 rc = check_XRC_on_prefix(pfxdata, basedev);
503 DBF_DEV_EVENT(DBF_ERR, basedev,
504 "PFX LRE unknown opcode 0x%x", cmd);
509 dedata->attributes.mode = 0x3; /* ECKD */
511 if ((basepriv->rdc_data.cu_type == 0x2105 ||
512 basepriv->rdc_data.cu_type == 0x2107 ||
513 basepriv->rdc_data.cu_type == 0x1750)
514 && !(basepriv->uses_cdl && trk < 2))
515 dedata->ga_extended |= 0x40; /* Regular Data Format Mode */
517 heads = basepriv->rdc_data.trk_per_cyl;
518 begcyl = trk / heads;
519 beghead = trk % heads;
520 endcyl = totrk / heads;
521 endhead = totrk % heads;
523 /* check for sequential prestage - enhance cylinder range */
524 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE ||
525 dedata->attributes.operation == DASD_SEQ_ACCESS) {
527 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl)
528 endcyl += basepriv->attrib.nr_cyl;
530 endcyl = (basepriv->real_cyl - 1);
533 set_ch_t(&dedata->beg_ext, begcyl, beghead);
534 set_ch_t(&dedata->end_ext, endcyl, endhead);
537 fill_LRE_data(lredata, trk, rec_on_trk, count, cmd,
538 basedev, blksize, tlf);
544 static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
545 unsigned int trk, unsigned int totrk, int cmd,
546 struct dasd_device *basedev, struct dasd_device *startdev)
548 return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev,
553 locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk,
554 unsigned int rec_on_trk, int no_rec, int cmd,
555 struct dasd_device * device, int reclen)
557 struct dasd_eckd_private *private;
561 private = (struct dasd_eckd_private *) device->private;
563 DBF_DEV_EVENT(DBF_INFO, device,
564 "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d",
565 trk, rec_on_trk, no_rec, cmd, reclen);
567 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD;
570 ccw->cda = (__u32) __pa(data);
572 memset(data, 0, sizeof(struct LO_eckd_data));
575 switch (private->rdc_data.dev_type) {
577 dn = ceil_quot(reclen + 6, 232);
578 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
579 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
582 d = 7 + ceil_quot(reclen + 12, 32);
583 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
587 data->sector = sector;
588 data->count = no_rec;
590 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
591 data->operation.orientation = 0x3;
592 data->operation.operation = 0x03;
594 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
595 data->operation.orientation = 0x3;
596 data->operation.operation = 0x16;
598 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
599 data->operation.orientation = 0x1;
600 data->operation.operation = 0x03;
603 case DASD_ECKD_CCW_READ_RECORD_ZERO:
604 data->operation.orientation = 0x3;
605 data->operation.operation = 0x16;
608 case DASD_ECKD_CCW_WRITE:
609 case DASD_ECKD_CCW_WRITE_MT:
610 case DASD_ECKD_CCW_WRITE_KD:
611 case DASD_ECKD_CCW_WRITE_KD_MT:
612 data->auxiliary.last_bytes_used = 0x1;
613 data->length = reclen;
614 data->operation.operation = 0x01;
616 case DASD_ECKD_CCW_WRITE_CKD:
617 case DASD_ECKD_CCW_WRITE_CKD_MT:
618 data->auxiliary.last_bytes_used = 0x1;
619 data->length = reclen;
620 data->operation.operation = 0x03;
622 case DASD_ECKD_CCW_READ:
623 case DASD_ECKD_CCW_READ_MT:
624 case DASD_ECKD_CCW_READ_KD:
625 case DASD_ECKD_CCW_READ_KD_MT:
626 data->auxiliary.last_bytes_used = 0x1;
627 data->length = reclen;
628 data->operation.operation = 0x06;
630 case DASD_ECKD_CCW_READ_CKD:
631 case DASD_ECKD_CCW_READ_CKD_MT:
632 data->auxiliary.last_bytes_used = 0x1;
633 data->length = reclen;
634 data->operation.operation = 0x16;
636 case DASD_ECKD_CCW_READ_COUNT:
637 data->operation.operation = 0x06;
639 case DASD_ECKD_CCW_ERASE:
640 data->length = reclen;
641 data->auxiliary.last_bytes_used = 0x1;
642 data->operation.operation = 0x0b;
645 DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record "
648 set_ch_t(&data->seek_addr,
649 trk / private->rdc_data.trk_per_cyl,
650 trk % private->rdc_data.trk_per_cyl);
651 data->search_arg.cyl = data->seek_addr.cyl;
652 data->search_arg.head = data->seek_addr.head;
653 data->search_arg.record = rec_on_trk;
657 * Returns 1 if the block is one of the special blocks that needs
658 * to get read/written with the KD variant of the command.
659 * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and
660 * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT.
661 * Luckily the KD variants differ only by one bit (0x08) from the
662 * normal variant. So don't wonder about code like:
663 * if (dasd_eckd_cdl_special(blk_per_trk, recid))
664 * ccw->cmd_code |= 0x8;
667 dasd_eckd_cdl_special(int blk_per_trk, int recid)
671 if (recid < blk_per_trk)
673 if (recid < 2 * blk_per_trk)
679 * Returns the record size for the special blocks of the cdl format.
680 * Only returns something useful if dasd_eckd_cdl_special is true
684 dasd_eckd_cdl_reclen(int recid)
687 return sizes_trk0[recid];
692 * Generate device unique id that specifies the physical device.
694 static int dasd_eckd_generate_uid(struct dasd_device *device,
695 struct dasd_uid *uid)
697 struct dasd_eckd_private *private;
700 private = (struct dasd_eckd_private *) device->private;
703 if (!private->ned || !private->gneq)
706 memset(uid, 0, sizeof(struct dasd_uid));
707 memcpy(uid->vendor, private->ned->HDA_manufacturer,
708 sizeof(uid->vendor) - 1);
709 EBCASC(uid->vendor, sizeof(uid->vendor) - 1);
710 memcpy(uid->serial, private->ned->HDA_location,
711 sizeof(uid->serial) - 1);
712 EBCASC(uid->serial, sizeof(uid->serial) - 1);
713 uid->ssid = private->gneq->subsystemID;
714 uid->real_unit_addr = private->ned->unit_addr;
716 uid->type = private->sneq->sua_flags;
717 if (uid->type == UA_BASE_PAV_ALIAS)
718 uid->base_unit_addr = private->sneq->base_unit_addr;
720 uid->type = UA_BASE_DEVICE;
722 if (private->vdsneq) {
723 for (count = 0; count < 16; count++) {
724 sprintf(uid->vduit+2*count, "%02x",
725 private->vdsneq->uit[count]);
731 static struct dasd_ccw_req *dasd_eckd_build_rcd_lpm(struct dasd_device *device,
733 struct ciw *ciw, __u8 lpm)
735 struct dasd_ccw_req *cqr;
738 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, ciw->count,
742 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
743 "Could not allocate RCD request");
748 ccw->cmd_code = ciw->cmd;
749 ccw->cda = (__u32)(addr_t)rcd_buffer;
750 ccw->count = ciw->count;
752 cqr->startdev = device;
753 cqr->memdev = device;
755 cqr->expires = 10*HZ;
758 cqr->buildclk = get_clock();
759 cqr->status = DASD_CQR_FILLED;
763 static int dasd_eckd_read_conf_lpm(struct dasd_device *device,
765 int *rcd_buffer_size, __u8 lpm)
768 char *rcd_buf = NULL;
770 struct dasd_ccw_req *cqr;
773 * scan for RCD command in extended SenseID data
775 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD);
776 if (!ciw || ciw->cmd == 0) {
780 rcd_buf = kzalloc(ciw->count, GFP_KERNEL | GFP_DMA);
787 * buffer has to start with EBCDIC "V1.0" to show
788 * support for virtual device SNEQ
794 cqr = dasd_eckd_build_rcd_lpm(device, rcd_buf, ciw, lpm);
799 ret = dasd_sleep_on(cqr);
801 * on success we update the user input parms
803 dasd_sfree_request(cqr, cqr->memdev);
807 *rcd_buffer_size = ciw->count;
808 *rcd_buffer = rcd_buf;
813 *rcd_buffer_size = 0;
817 static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private)
820 struct dasd_sneq *sneq;
824 private->sneq = NULL;
825 private->vdsneq = NULL;
826 private->gneq = NULL;
827 count = private->conf_len / sizeof(struct dasd_sneq);
828 sneq = (struct dasd_sneq *)private->conf_data;
829 for (i = 0; i < count; ++i) {
830 if (sneq->flags.identifier == 1 && sneq->format == 1)
831 private->sneq = sneq;
832 else if (sneq->flags.identifier == 1 && sneq->format == 4)
833 private->vdsneq = (struct vd_sneq *)sneq;
834 else if (sneq->flags.identifier == 2)
835 private->gneq = (struct dasd_gneq *)sneq;
836 else if (sneq->flags.identifier == 3 && sneq->res1 == 1)
837 private->ned = (struct dasd_ned *)sneq;
840 if (!private->ned || !private->gneq) {
842 private->sneq = NULL;
843 private->vdsneq = NULL;
844 private->gneq = NULL;
851 static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len)
853 struct dasd_gneq *gneq;
856 count = conf_len / sizeof(*gneq);
857 gneq = (struct dasd_gneq *)conf_data;
859 for (i = 0; i < count; ++i) {
860 if (gneq->flags.identifier == 2) {
867 return ((char *)gneq)[18] & 0x07;
872 static int dasd_eckd_read_conf(struct dasd_device *device)
875 int conf_len, conf_data_saved;
878 struct dasd_eckd_private *private;
879 struct dasd_eckd_path *path_data;
881 private = (struct dasd_eckd_private *) device->private;
882 path_data = (struct dasd_eckd_path *) &private->path_data;
883 path_data->opm = ccw_device_get_path_mask(device->cdev);
886 /* get configuration data per operational path */
887 for (lpm = 0x80; lpm; lpm>>= 1) {
888 if (lpm & path_data->opm){
889 rc = dasd_eckd_read_conf_lpm(device, &conf_data,
891 if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */
892 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
893 "Read configuration data returned "
897 if (conf_data == NULL) {
898 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
899 "No configuration data "
901 continue; /* no error */
903 /* save first valid configuration data */
904 if (!conf_data_saved) {
905 kfree(private->conf_data);
906 private->conf_data = conf_data;
907 private->conf_len = conf_len;
908 if (dasd_eckd_identify_conf_parts(private)) {
909 private->conf_data = NULL;
910 private->conf_len = 0;
916 switch (dasd_eckd_path_access(conf_data, conf_len)) {
918 path_data->npm |= lpm;
921 path_data->ppm |= lpm;
924 if (conf_data != private->conf_data)
931 static int dasd_eckd_read_features(struct dasd_device *device)
933 struct dasd_psf_prssd_data *prssdp;
934 struct dasd_rssd_features *features;
935 struct dasd_ccw_req *cqr;
938 struct dasd_eckd_private *private;
940 private = (struct dasd_eckd_private *) device->private;
941 memset(&private->features, 0, sizeof(struct dasd_rssd_features));
942 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
943 (sizeof(struct dasd_psf_prssd_data) +
944 sizeof(struct dasd_rssd_features)),
947 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not "
948 "allocate initialization request");
951 cqr->startdev = device;
952 cqr->memdev = device;
955 cqr->expires = 10 * HZ;
957 /* Prepare for Read Subsystem Data */
958 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
959 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
960 prssdp->order = PSF_ORDER_PRSSD;
961 prssdp->suborder = 0x41; /* Read Feature Codes */
962 /* all other bytes of prssdp must be zero */
965 ccw->cmd_code = DASD_ECKD_CCW_PSF;
966 ccw->count = sizeof(struct dasd_psf_prssd_data);
967 ccw->flags |= CCW_FLAG_CC;
968 ccw->cda = (__u32)(addr_t) prssdp;
970 /* Read Subsystem Data - feature codes */
971 features = (struct dasd_rssd_features *) (prssdp + 1);
972 memset(features, 0, sizeof(struct dasd_rssd_features));
975 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
976 ccw->count = sizeof(struct dasd_rssd_features);
977 ccw->cda = (__u32)(addr_t) features;
979 cqr->buildclk = get_clock();
980 cqr->status = DASD_CQR_FILLED;
981 rc = dasd_sleep_on(cqr);
983 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
984 features = (struct dasd_rssd_features *) (prssdp + 1);
985 memcpy(&private->features, features,
986 sizeof(struct dasd_rssd_features));
988 dev_warn(&device->cdev->dev, "Reading device feature codes"
989 " failed with rc=%d\n", rc);
990 dasd_sfree_request(cqr, cqr->memdev);
996 * Build CP for Perform Subsystem Function - SSC.
998 static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device,
1001 struct dasd_ccw_req *cqr;
1002 struct dasd_psf_ssc_data *psf_ssc_data;
1005 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ ,
1006 sizeof(struct dasd_psf_ssc_data),
1010 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1011 "Could not allocate PSF-SSC request");
1014 psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data;
1015 psf_ssc_data->order = PSF_ORDER_SSC;
1016 psf_ssc_data->suborder = 0xc0;
1018 psf_ssc_data->suborder |= 0x08;
1019 psf_ssc_data->reserved[0] = 0x88;
1022 ccw->cmd_code = DASD_ECKD_CCW_PSF;
1023 ccw->cda = (__u32)(addr_t)psf_ssc_data;
1026 cqr->startdev = device;
1027 cqr->memdev = device;
1030 cqr->expires = 10*HZ;
1031 cqr->buildclk = get_clock();
1032 cqr->status = DASD_CQR_FILLED;
1037 * Perform Subsystem Function.
1038 * It is necessary to trigger CIO for channel revalidation since this
1039 * call might change behaviour of DASD devices.
1042 dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav)
1044 struct dasd_ccw_req *cqr;
1047 cqr = dasd_eckd_build_psf_ssc(device, enable_pav);
1049 return PTR_ERR(cqr);
1051 rc = dasd_sleep_on(cqr);
1053 /* trigger CIO to reprobe devices */
1054 css_schedule_reprobe();
1055 dasd_sfree_request(cqr, cqr->memdev);
1060 * Valide storage server of current device.
1062 static void dasd_eckd_validate_server(struct dasd_device *device)
1065 struct dasd_eckd_private *private;
1068 if (dasd_nopav || MACHINE_IS_VM)
1072 rc = dasd_eckd_psf_ssc(device, enable_pav);
1074 /* may be requested feature is not available on server,
1075 * therefore just report error and go ahead */
1076 private = (struct dasd_eckd_private *) device->private;
1077 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x "
1078 "returned rc=%d", private->uid.ssid, rc);
1082 * Check device characteristics.
1083 * If the device is accessible using ECKD discipline, the device is enabled.
1086 dasd_eckd_check_characteristics(struct dasd_device *device)
1088 struct dasd_eckd_private *private;
1089 struct dasd_block *block;
1092 if (!ccw_device_is_pathgroup(device->cdev)) {
1093 dev_warn(&device->cdev->dev,
1094 "A channel path group could not be established\n");
1097 if (!ccw_device_is_multipath(device->cdev)) {
1098 dev_info(&device->cdev->dev,
1099 "The DASD is not operating in multipath mode\n");
1101 private = (struct dasd_eckd_private *) device->private;
1103 private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA);
1105 dev_warn(&device->cdev->dev,
1106 "Allocating memory for private DASD data "
1110 device->private = (void *) private;
1112 memset(private, 0, sizeof(*private));
1114 /* Invalidate status of initial analysis. */
1115 private->init_cqr_status = -1;
1116 /* Set default cache operations. */
1117 private->attrib.operation = DASD_NORMAL_CACHE;
1118 private->attrib.nr_cyl = 0;
1120 /* Read Configuration Data */
1121 rc = dasd_eckd_read_conf(device);
1125 /* Generate device unique id and register in devmap */
1126 rc = dasd_eckd_generate_uid(device, &private->uid);
1129 dasd_set_uid(device->cdev, &private->uid);
1131 if (private->uid.type == UA_BASE_DEVICE) {
1132 block = dasd_alloc_block();
1133 if (IS_ERR(block)) {
1134 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1135 "could not allocate dasd "
1137 rc = PTR_ERR(block);
1140 device->block = block;
1141 block->base = device;
1144 /* register lcu with alias handling, enable PAV if this is a new lcu */
1145 is_known = dasd_alias_make_device_known_to_lcu(device);
1151 * dasd_eckd_vaildate_server is done on the first device that
1152 * is found for an LCU. All later other devices have to wait
1153 * for it, so they will read the correct feature codes.
1156 dasd_eckd_validate_server(device);
1157 dasd_alias_lcu_setup_complete(device);
1159 dasd_alias_wait_for_lcu_setup(device);
1161 /* device may report different configuration data after LCU setup */
1162 rc = dasd_eckd_read_conf(device);
1166 /* Read Feature Codes */
1167 dasd_eckd_read_features(device);
1169 /* Read Device Characteristics */
1170 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
1171 &private->rdc_data, 64);
1173 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1174 "Read device characteristic failed, rc=%d", rc);
1177 /* find the vaild cylinder size */
1178 if (private->rdc_data.no_cyl == LV_COMPAT_CYL &&
1179 private->rdc_data.long_no_cyl)
1180 private->real_cyl = private->rdc_data.long_no_cyl;
1182 private->real_cyl = private->rdc_data.no_cyl;
1184 dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) "
1185 "with %d cylinders, %d heads, %d sectors\n",
1186 private->rdc_data.dev_type,
1187 private->rdc_data.dev_model,
1188 private->rdc_data.cu_type,
1189 private->rdc_data.cu_model.model,
1191 private->rdc_data.trk_per_cyl,
1192 private->rdc_data.sec_per_trk);
1196 dasd_alias_disconnect_device_from_lcu(device);
1198 dasd_free_block(device->block);
1199 device->block = NULL;
1201 kfree(private->conf_data);
1202 kfree(device->private);
1203 device->private = NULL;
1207 static void dasd_eckd_uncheck_device(struct dasd_device *device)
1209 struct dasd_eckd_private *private;
1211 private = (struct dasd_eckd_private *) device->private;
1212 dasd_alias_disconnect_device_from_lcu(device);
1213 private->ned = NULL;
1214 private->sneq = NULL;
1215 private->vdsneq = NULL;
1216 private->gneq = NULL;
1217 private->conf_len = 0;
1218 kfree(private->conf_data);
1219 private->conf_data = NULL;
1222 static struct dasd_ccw_req *
1223 dasd_eckd_analysis_ccw(struct dasd_device *device)
1225 struct dasd_eckd_private *private;
1226 struct eckd_count *count_data;
1227 struct LO_eckd_data *LO_data;
1228 struct dasd_ccw_req *cqr;
1230 int cplength, datasize;
1233 private = (struct dasd_eckd_private *) device->private;
1236 datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data);
1237 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device);
1241 /* Define extent for the first 3 tracks. */
1242 define_extent(ccw++, cqr->data, 0, 2,
1243 DASD_ECKD_CCW_READ_COUNT, device);
1244 LO_data = cqr->data + sizeof(struct DE_eckd_data);
1245 /* Locate record for the first 4 records on track 0. */
1246 ccw[-1].flags |= CCW_FLAG_CC;
1247 locate_record(ccw++, LO_data++, 0, 0, 4,
1248 DASD_ECKD_CCW_READ_COUNT, device, 0);
1250 count_data = private->count_area;
1251 for (i = 0; i < 4; i++) {
1252 ccw[-1].flags |= CCW_FLAG_CC;
1253 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
1256 ccw->cda = (__u32)(addr_t) count_data;
1261 /* Locate record for the first record on track 2. */
1262 ccw[-1].flags |= CCW_FLAG_CC;
1263 locate_record(ccw++, LO_data++, 2, 0, 1,
1264 DASD_ECKD_CCW_READ_COUNT, device, 0);
1265 /* Read count ccw. */
1266 ccw[-1].flags |= CCW_FLAG_CC;
1267 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
1270 ccw->cda = (__u32)(addr_t) count_data;
1273 cqr->startdev = device;
1274 cqr->memdev = device;
1276 cqr->buildclk = get_clock();
1277 cqr->status = DASD_CQR_FILLED;
1281 /* differentiate between 'no record found' and any other error */
1282 static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr)
1285 if (init_cqr->status == DASD_CQR_DONE)
1287 else if (init_cqr->status == DASD_CQR_NEED_ERP ||
1288 init_cqr->status == DASD_CQR_FAILED) {
1289 sense = dasd_get_sense(&init_cqr->irb);
1290 if (sense && (sense[1] & SNS1_NO_REC_FOUND))
1291 return INIT_CQR_UNFORMATTED;
1293 return INIT_CQR_ERROR;
1295 return INIT_CQR_ERROR;
1299 * This is the callback function for the init_analysis cqr. It saves
1300 * the status of the initial analysis ccw before it frees it and kicks
1301 * the device to continue the startup sequence. This will call
1302 * dasd_eckd_do_analysis again (if the devices has not been marked
1303 * for deletion in the meantime).
1305 static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr,
1308 struct dasd_eckd_private *private;
1309 struct dasd_device *device;
1311 device = init_cqr->startdev;
1312 private = (struct dasd_eckd_private *) device->private;
1313 private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr);
1314 dasd_sfree_request(init_cqr, device);
1315 dasd_kick_device(device);
1318 static int dasd_eckd_start_analysis(struct dasd_block *block)
1320 struct dasd_eckd_private *private;
1321 struct dasd_ccw_req *init_cqr;
1323 private = (struct dasd_eckd_private *) block->base->private;
1324 init_cqr = dasd_eckd_analysis_ccw(block->base);
1325 if (IS_ERR(init_cqr))
1326 return PTR_ERR(init_cqr);
1327 init_cqr->callback = dasd_eckd_analysis_callback;
1328 init_cqr->callback_data = NULL;
1329 init_cqr->expires = 5*HZ;
1330 /* first try without ERP, so we can later handle unformatted
1331 * devices as special case
1333 clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags);
1334 init_cqr->retries = 0;
1335 dasd_add_request_head(init_cqr);
1339 static int dasd_eckd_end_analysis(struct dasd_block *block)
1341 struct dasd_device *device;
1342 struct dasd_eckd_private *private;
1343 struct eckd_count *count_area;
1344 unsigned int sb, blk_per_trk;
1346 struct dasd_ccw_req *init_cqr;
1348 device = block->base;
1349 private = (struct dasd_eckd_private *) device->private;
1350 status = private->init_cqr_status;
1351 private->init_cqr_status = -1;
1352 if (status == INIT_CQR_ERROR) {
1353 /* try again, this time with full ERP */
1354 init_cqr = dasd_eckd_analysis_ccw(device);
1355 dasd_sleep_on(init_cqr);
1356 status = dasd_eckd_analysis_evaluation(init_cqr);
1357 dasd_sfree_request(init_cqr, device);
1360 if (status == INIT_CQR_UNFORMATTED) {
1361 dev_warn(&device->cdev->dev, "The DASD is not formatted\n");
1362 return -EMEDIUMTYPE;
1363 } else if (status == INIT_CQR_ERROR) {
1364 dev_err(&device->cdev->dev,
1365 "Detecting the DASD disk layout failed because "
1366 "of an I/O error\n");
1370 private->uses_cdl = 1;
1371 /* Check Track 0 for Compatible Disk Layout */
1373 for (i = 0; i < 3; i++) {
1374 if (private->count_area[i].kl != 4 ||
1375 private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4) {
1376 private->uses_cdl = 0;
1381 count_area = &private->count_area[4];
1383 if (private->uses_cdl == 0) {
1384 for (i = 0; i < 5; i++) {
1385 if ((private->count_area[i].kl != 0) ||
1386 (private->count_area[i].dl !=
1387 private->count_area[0].dl))
1391 count_area = &private->count_area[0];
1393 if (private->count_area[3].record == 1)
1394 dev_warn(&device->cdev->dev,
1395 "Track 0 has no records following the VTOC\n");
1397 if (count_area != NULL && count_area->kl == 0) {
1398 /* we found notthing violating our disk layout */
1399 if (dasd_check_blocksize(count_area->dl) == 0)
1400 block->bp_block = count_area->dl;
1402 if (block->bp_block == 0) {
1403 dev_warn(&device->cdev->dev,
1404 "The disk layout of the DASD is not supported\n");
1405 return -EMEDIUMTYPE;
1407 block->s2b_shift = 0; /* bits to shift 512 to get a block */
1408 for (sb = 512; sb < block->bp_block; sb = sb << 1)
1411 blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block);
1412 block->blocks = (private->real_cyl *
1413 private->rdc_data.trk_per_cyl *
1416 dev_info(&device->cdev->dev,
1417 "DASD with %d KB/block, %d KB total size, %d KB/track, "
1418 "%s\n", (block->bp_block >> 10),
1419 ((private->real_cyl *
1420 private->rdc_data.trk_per_cyl *
1421 blk_per_trk * (block->bp_block >> 9)) >> 1),
1422 ((blk_per_trk * block->bp_block) >> 10),
1424 "compatible disk layout" : "linux disk layout");
1429 static int dasd_eckd_do_analysis(struct dasd_block *block)
1431 struct dasd_eckd_private *private;
1433 private = (struct dasd_eckd_private *) block->base->private;
1434 if (private->init_cqr_status < 0)
1435 return dasd_eckd_start_analysis(block);
1437 return dasd_eckd_end_analysis(block);
1440 static int dasd_eckd_ready_to_online(struct dasd_device *device)
1442 return dasd_alias_add_device(device);
1445 static int dasd_eckd_online_to_ready(struct dasd_device *device)
1447 return dasd_alias_remove_device(device);
1451 dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo)
1453 struct dasd_eckd_private *private;
1455 private = (struct dasd_eckd_private *) block->base->private;
1456 if (dasd_check_blocksize(block->bp_block) == 0) {
1457 geo->sectors = recs_per_track(&private->rdc_data,
1458 0, block->bp_block);
1460 geo->cylinders = private->rdc_data.no_cyl;
1461 geo->heads = private->rdc_data.trk_per_cyl;
1465 static struct dasd_ccw_req *
1466 dasd_eckd_format_device(struct dasd_device * device,
1467 struct format_data_t * fdata)
1469 struct dasd_eckd_private *private;
1470 struct dasd_ccw_req *fcp;
1471 struct eckd_count *ect;
1475 struct ch_t address;
1476 int cplength, datasize;
1481 private = (struct dasd_eckd_private *) device->private;
1482 rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize);
1484 fdata->start_unit / private->rdc_data.trk_per_cyl,
1485 fdata->start_unit % private->rdc_data.trk_per_cyl);
1487 /* Sanity checks. */
1488 if (fdata->start_unit >=
1489 (private->real_cyl * private->rdc_data.trk_per_cyl)) {
1490 dev_warn(&device->cdev->dev, "Start track number %d used in "
1491 "formatting is too big\n", fdata->start_unit);
1492 return ERR_PTR(-EINVAL);
1494 if (fdata->start_unit > fdata->stop_unit) {
1495 dev_warn(&device->cdev->dev, "Start track %d used in "
1496 "formatting exceeds end track\n", fdata->start_unit);
1497 return ERR_PTR(-EINVAL);
1499 if (dasd_check_blocksize(fdata->blksize) != 0) {
1500 dev_warn(&device->cdev->dev,
1501 "The DASD cannot be formatted with block size %d\n",
1503 return ERR_PTR(-EINVAL);
1507 * fdata->intensity is a bit string that tells us what to do:
1508 * Bit 0: write record zero
1509 * Bit 1: write home address, currently not supported
1510 * Bit 2: invalidate tracks
1511 * Bit 3: use OS/390 compatible disk layout (cdl)
1512 * Bit 4: do not allow storage subsystem to modify record zero
1513 * Only some bit combinations do make sense.
1515 if (fdata->intensity & 0x10) {
1517 intensity = fdata->intensity & ~0x10;
1520 intensity = fdata->intensity;
1522 switch (intensity) {
1523 case 0x00: /* Normal format */
1524 case 0x08: /* Normal format, use cdl. */
1526 datasize = sizeof(struct DE_eckd_data) +
1527 sizeof(struct LO_eckd_data) +
1528 rpt * sizeof(struct eckd_count);
1530 case 0x01: /* Write record zero and format track. */
1531 case 0x09: /* Write record zero and format track, use cdl. */
1533 datasize = sizeof(struct DE_eckd_data) +
1534 sizeof(struct LO_eckd_data) +
1535 sizeof(struct eckd_count) +
1536 rpt * sizeof(struct eckd_count);
1538 case 0x04: /* Invalidate track. */
1539 case 0x0c: /* Invalidate track, use cdl. */
1541 datasize = sizeof(struct DE_eckd_data) +
1542 sizeof(struct LO_eckd_data) +
1543 sizeof(struct eckd_count);
1546 dev_warn(&device->cdev->dev, "An I/O control call used "
1547 "incorrect flags 0x%x\n", fdata->intensity);
1548 return ERR_PTR(-EINVAL);
1550 /* Allocate the format ccw request. */
1551 fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device);
1558 switch (intensity & ~0x08) {
1559 case 0x00: /* Normal format. */
1560 define_extent(ccw++, (struct DE_eckd_data *) data,
1561 fdata->start_unit, fdata->start_unit,
1562 DASD_ECKD_CCW_WRITE_CKD, device);
1563 /* grant subsystem permission to format R0 */
1565 ((struct DE_eckd_data *)data)->ga_extended |= 0x04;
1566 data += sizeof(struct DE_eckd_data);
1567 ccw[-1].flags |= CCW_FLAG_CC;
1568 locate_record(ccw++, (struct LO_eckd_data *) data,
1569 fdata->start_unit, 0, rpt,
1570 DASD_ECKD_CCW_WRITE_CKD, device,
1572 data += sizeof(struct LO_eckd_data);
1574 case 0x01: /* Write record zero + format track. */
1575 define_extent(ccw++, (struct DE_eckd_data *) data,
1576 fdata->start_unit, fdata->start_unit,
1577 DASD_ECKD_CCW_WRITE_RECORD_ZERO,
1579 data += sizeof(struct DE_eckd_data);
1580 ccw[-1].flags |= CCW_FLAG_CC;
1581 locate_record(ccw++, (struct LO_eckd_data *) data,
1582 fdata->start_unit, 0, rpt + 1,
1583 DASD_ECKD_CCW_WRITE_RECORD_ZERO, device,
1584 device->block->bp_block);
1585 data += sizeof(struct LO_eckd_data);
1587 case 0x04: /* Invalidate track. */
1588 define_extent(ccw++, (struct DE_eckd_data *) data,
1589 fdata->start_unit, fdata->start_unit,
1590 DASD_ECKD_CCW_WRITE_CKD, device);
1591 data += sizeof(struct DE_eckd_data);
1592 ccw[-1].flags |= CCW_FLAG_CC;
1593 locate_record(ccw++, (struct LO_eckd_data *) data,
1594 fdata->start_unit, 0, 1,
1595 DASD_ECKD_CCW_WRITE_CKD, device, 8);
1596 data += sizeof(struct LO_eckd_data);
1599 if (intensity & 0x01) { /* write record zero */
1600 ect = (struct eckd_count *) data;
1601 data += sizeof(struct eckd_count);
1602 ect->cyl = address.cyl;
1603 ect->head = address.head;
1607 ccw[-1].flags |= CCW_FLAG_CC;
1608 ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO;
1609 ccw->flags = CCW_FLAG_SLI;
1611 ccw->cda = (__u32)(addr_t) ect;
1614 if ((intensity & ~0x08) & 0x04) { /* erase track */
1615 ect = (struct eckd_count *) data;
1616 data += sizeof(struct eckd_count);
1617 ect->cyl = address.cyl;
1618 ect->head = address.head;
1622 ccw[-1].flags |= CCW_FLAG_CC;
1623 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD;
1624 ccw->flags = CCW_FLAG_SLI;
1626 ccw->cda = (__u32)(addr_t) ect;
1627 } else { /* write remaining records */
1628 for (i = 0; i < rpt; i++) {
1629 ect = (struct eckd_count *) data;
1630 data += sizeof(struct eckd_count);
1631 ect->cyl = address.cyl;
1632 ect->head = address.head;
1633 ect->record = i + 1;
1635 ect->dl = fdata->blksize;
1636 /* Check for special tracks 0-1 when formatting CDL */
1637 if ((intensity & 0x08) &&
1638 fdata->start_unit == 0) {
1641 ect->dl = sizes_trk0[i] - 4;
1644 if ((intensity & 0x08) &&
1645 fdata->start_unit == 1) {
1647 ect->dl = LABEL_SIZE - 44;
1649 ccw[-1].flags |= CCW_FLAG_CC;
1650 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD;
1651 ccw->flags = CCW_FLAG_SLI;
1653 ccw->cda = (__u32)(addr_t) ect;
1657 fcp->startdev = device;
1658 fcp->memdev = device;
1660 fcp->buildclk = get_clock();
1661 fcp->status = DASD_CQR_FILLED;
1665 static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr)
1667 cqr->status = DASD_CQR_FILLED;
1668 if (cqr->block && (cqr->startdev != cqr->block->base)) {
1669 dasd_eckd_reset_ccw_to_base_io(cqr);
1670 cqr->startdev = cqr->block->base;
1674 static dasd_erp_fn_t
1675 dasd_eckd_erp_action(struct dasd_ccw_req * cqr)
1677 struct dasd_device *device = (struct dasd_device *) cqr->startdev;
1678 struct ccw_device *cdev = device->cdev;
1680 switch (cdev->id.cu_type) {
1685 return dasd_3990_erp_action;
1689 return dasd_default_erp_action;
1693 static dasd_erp_fn_t
1694 dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr)
1696 return dasd_default_erp_postaction;
1700 static void dasd_eckd_handle_unsolicited_interrupt(struct dasd_device *device,
1706 /* first of all check for state change pending interrupt */
1707 mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP;
1708 if ((scsw_dstat(&irb->scsw) & mask) == mask) {
1709 dasd_generic_handle_state_change(device);
1713 /* summary unit check */
1714 if ((scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) &&
1715 (irb->ecw[7] == 0x0D)) {
1716 dasd_alias_handle_summary_unit_check(device, irb);
1720 sense = dasd_get_sense(irb);
1721 /* service information message SIM */
1722 if (sense && !(sense[27] & DASD_SENSE_BIT_0) &&
1723 ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) {
1724 dasd_3990_erp_handle_sim(device, sense);
1725 dasd_schedule_device_bh(device);
1729 if ((scsw_cc(&irb->scsw) == 1) &&
1730 (scsw_fctl(&irb->scsw) & SCSW_FCTL_START_FUNC) &&
1731 (scsw_actl(&irb->scsw) & SCSW_ACTL_START_PEND) &&
1732 (scsw_stctl(&irb->scsw) & SCSW_STCTL_STATUS_PEND)) {
1733 /* fake irb do nothing, they are handled elsewhere */
1734 dasd_schedule_device_bh(device);
1739 /* just report other unsolicited interrupts */
1740 DBF_DEV_EVENT(DBF_ERR, device, "%s",
1741 "unsolicited interrupt received");
1743 DBF_DEV_EVENT(DBF_ERR, device, "%s",
1744 "unsolicited interrupt received "
1745 "(sense available)");
1746 device->discipline->dump_sense_dbf(device, irb, "unsolicited");
1749 dasd_schedule_device_bh(device);
1754 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single(
1755 struct dasd_device *startdev,
1756 struct dasd_block *block,
1757 struct request *req,
1762 unsigned int first_offs,
1763 unsigned int last_offs,
1764 unsigned int blk_per_trk,
1765 unsigned int blksize)
1767 struct dasd_eckd_private *private;
1768 unsigned long *idaws;
1769 struct LO_eckd_data *LO_data;
1770 struct dasd_ccw_req *cqr;
1772 struct req_iterator iter;
1776 int count, cidaw, cplength, datasize;
1778 unsigned char cmd, rcmd;
1780 struct dasd_device *basedev;
1782 basedev = block->base;
1783 private = (struct dasd_eckd_private *) basedev->private;
1784 if (rq_data_dir(req) == READ)
1785 cmd = DASD_ECKD_CCW_READ_MT;
1786 else if (rq_data_dir(req) == WRITE)
1787 cmd = DASD_ECKD_CCW_WRITE_MT;
1789 return ERR_PTR(-EINVAL);
1791 /* Check struct bio and count the number of blocks for the request. */
1794 rq_for_each_segment(bv, req, iter) {
1795 if (bv->bv_len & (blksize - 1))
1796 /* Eckd can only do full blocks. */
1797 return ERR_PTR(-EINVAL);
1798 count += bv->bv_len >> (block->s2b_shift + 9);
1799 #if defined(CONFIG_64BIT)
1800 if (idal_is_needed (page_address(bv->bv_page), bv->bv_len))
1801 cidaw += bv->bv_len >> (block->s2b_shift + 9);
1805 if (count != last_rec - first_rec + 1)
1806 return ERR_PTR(-EINVAL);
1808 /* use the prefix command if available */
1809 use_prefix = private->features.feature[8] & 0x01;
1811 /* 1x prefix + number of blocks */
1812 cplength = 2 + count;
1813 /* 1x prefix + cidaws*sizeof(long) */
1814 datasize = sizeof(struct PFX_eckd_data) +
1815 sizeof(struct LO_eckd_data) +
1816 cidaw * sizeof(unsigned long);
1818 /* 1x define extent + 1x locate record + number of blocks */
1819 cplength = 2 + count;
1820 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */
1821 datasize = sizeof(struct DE_eckd_data) +
1822 sizeof(struct LO_eckd_data) +
1823 cidaw * sizeof(unsigned long);
1825 /* Find out the number of additional locate record ccws for cdl. */
1826 if (private->uses_cdl && first_rec < 2*blk_per_trk) {
1827 if (last_rec >= 2*blk_per_trk)
1828 count = 2*blk_per_trk - first_rec;
1830 datasize += count*sizeof(struct LO_eckd_data);
1832 /* Allocate the ccw request. */
1833 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
1838 /* First ccw is define extent or prefix. */
1840 if (prefix(ccw++, cqr->data, first_trk,
1841 last_trk, cmd, basedev, startdev) == -EAGAIN) {
1842 /* Clock not in sync and XRC is enabled.
1845 dasd_sfree_request(cqr, startdev);
1846 return ERR_PTR(-EAGAIN);
1848 idaws = (unsigned long *) (cqr->data +
1849 sizeof(struct PFX_eckd_data));
1851 if (define_extent(ccw++, cqr->data, first_trk,
1852 last_trk, cmd, startdev) == -EAGAIN) {
1853 /* Clock not in sync and XRC is enabled.
1856 dasd_sfree_request(cqr, startdev);
1857 return ERR_PTR(-EAGAIN);
1859 idaws = (unsigned long *) (cqr->data +
1860 sizeof(struct DE_eckd_data));
1862 /* Build locate_record+read/write/ccws. */
1863 LO_data = (struct LO_eckd_data *) (idaws + cidaw);
1865 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) {
1866 /* Only standard blocks so there is just one locate record. */
1867 ccw[-1].flags |= CCW_FLAG_CC;
1868 locate_record(ccw++, LO_data++, first_trk, first_offs + 1,
1869 last_rec - recid + 1, cmd, basedev, blksize);
1871 rq_for_each_segment(bv, req, iter) {
1872 dst = page_address(bv->bv_page) + bv->bv_offset;
1873 if (dasd_page_cache) {
1874 char *copy = kmem_cache_alloc(dasd_page_cache,
1875 GFP_DMA | __GFP_NOWARN);
1876 if (copy && rq_data_dir(req) == WRITE)
1877 memcpy(copy + bv->bv_offset, dst, bv->bv_len);
1879 dst = copy + bv->bv_offset;
1881 for (off = 0; off < bv->bv_len; off += blksize) {
1882 sector_t trkid = recid;
1883 unsigned int recoffs = sector_div(trkid, blk_per_trk);
1886 /* Locate record for cdl special block ? */
1887 if (private->uses_cdl && recid < 2*blk_per_trk) {
1888 if (dasd_eckd_cdl_special(blk_per_trk, recid)){
1890 count = dasd_eckd_cdl_reclen(recid);
1891 if (count < blksize &&
1892 rq_data_dir(req) == READ)
1893 memset(dst + count, 0xe5,
1896 ccw[-1].flags |= CCW_FLAG_CC;
1897 locate_record(ccw++, LO_data++,
1899 1, rcmd, basedev, count);
1901 /* Locate record for standard blocks ? */
1902 if (private->uses_cdl && recid == 2*blk_per_trk) {
1903 ccw[-1].flags |= CCW_FLAG_CC;
1904 locate_record(ccw++, LO_data++,
1906 last_rec - recid + 1,
1907 cmd, basedev, count);
1909 /* Read/write ccw. */
1910 ccw[-1].flags |= CCW_FLAG_CC;
1911 ccw->cmd_code = rcmd;
1913 if (idal_is_needed(dst, blksize)) {
1914 ccw->cda = (__u32)(addr_t) idaws;
1915 ccw->flags = CCW_FLAG_IDA;
1916 idaws = idal_create_words(idaws, dst, blksize);
1918 ccw->cda = (__u32)(addr_t) dst;
1926 if (blk_noretry_request(req) ||
1927 block->base->features & DASD_FEATURE_FAILFAST)
1928 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
1929 cqr->startdev = startdev;
1930 cqr->memdev = startdev;
1932 cqr->expires = 5 * 60 * HZ; /* 5 minutes */
1933 cqr->lpm = private->path_data.ppm;
1935 cqr->buildclk = get_clock();
1936 cqr->status = DASD_CQR_FILLED;
1940 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track(
1941 struct dasd_device *startdev,
1942 struct dasd_block *block,
1943 struct request *req,
1948 unsigned int first_offs,
1949 unsigned int last_offs,
1950 unsigned int blk_per_trk,
1951 unsigned int blksize)
1953 struct dasd_eckd_private *private;
1954 unsigned long *idaws;
1955 struct dasd_ccw_req *cqr;
1957 struct req_iterator iter;
1959 char *dst, *idaw_dst;
1960 unsigned int cidaw, cplength, datasize;
1964 struct dasd_device *basedev;
1965 unsigned int trkcount, count, count_to_trk_end;
1966 unsigned int idaw_len, seg_len, part_len, len_to_track_end;
1967 unsigned char new_track, end_idaw;
1969 unsigned int recoffs;
1971 basedev = block->base;
1972 private = (struct dasd_eckd_private *) basedev->private;
1973 if (rq_data_dir(req) == READ)
1974 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
1975 else if (rq_data_dir(req) == WRITE)
1976 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
1978 return ERR_PTR(-EINVAL);
1980 /* Track based I/O needs IDAWs for each page, and not just for
1981 * 64 bit addresses. We need additional idals for pages
1982 * that get filled from two tracks, so we use the number
1983 * of records as upper limit.
1985 cidaw = last_rec - first_rec + 1;
1986 trkcount = last_trk - first_trk + 1;
1988 /* 1x prefix + one read/write ccw per track */
1989 cplength = 1 + trkcount;
1991 /* on 31-bit we need space for two 32 bit addresses per page
1992 * on 64-bit one 64 bit address
1994 datasize = sizeof(struct PFX_eckd_data) +
1995 cidaw * sizeof(unsigned long long);
1997 /* Allocate the ccw request. */
1998 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
2003 /* transfer length factor: how many bytes to read from the last track */
2004 if (first_trk == last_trk)
2005 tlf = last_offs - first_offs + 1;
2007 tlf = last_offs + 1;
2010 if (prefix_LRE(ccw++, cqr->data, first_trk,
2011 last_trk, cmd, basedev, startdev,
2012 1 /* format */, first_offs + 1,
2015 /* Clock not in sync and XRC is enabled.
2018 dasd_sfree_request(cqr, startdev);
2019 return ERR_PTR(-EAGAIN);
2023 * The translation of request into ccw programs must meet the
2024 * following conditions:
2025 * - all idaws but the first and the last must address full pages
2026 * (or 2K blocks on 31-bit)
2027 * - the scope of a ccw and it's idal ends with the track boundaries
2029 idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data));
2033 len_to_track_end = 0;
2036 rq_for_each_segment(bv, req, iter) {
2037 dst = page_address(bv->bv_page) + bv->bv_offset;
2038 seg_len = bv->bv_len;
2042 recoffs = sector_div(trkid, blk_per_trk);
2043 count_to_trk_end = blk_per_trk - recoffs;
2044 count = min((last_rec - recid + 1),
2045 (sector_t)count_to_trk_end);
2046 len_to_track_end = count * blksize;
2047 ccw[-1].flags |= CCW_FLAG_CC;
2048 ccw->cmd_code = cmd;
2049 ccw->count = len_to_track_end;
2050 ccw->cda = (__u32)(addr_t)idaws;
2051 ccw->flags = CCW_FLAG_IDA;
2055 /* first idaw for a ccw may start anywhere */
2059 /* If we start a new idaw, we must make sure that it
2060 * starts on an IDA_BLOCK_SIZE boundary.
2061 * If we continue an idaw, we must make sure that the
2062 * current segment begins where the so far accumulated
2066 if (__pa(dst) & (IDA_BLOCK_SIZE-1)) {
2067 dasd_sfree_request(cqr, startdev);
2068 return ERR_PTR(-ERANGE);
2072 if ((idaw_dst + idaw_len) != dst) {
2073 dasd_sfree_request(cqr, startdev);
2074 return ERR_PTR(-ERANGE);
2076 part_len = min(seg_len, len_to_track_end);
2077 seg_len -= part_len;
2079 idaw_len += part_len;
2080 len_to_track_end -= part_len;
2081 /* collected memory area ends on an IDA_BLOCK border,
2083 * idal_create_words will handle cases where idaw_len
2084 * is larger then IDA_BLOCK_SIZE
2086 if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1)))
2088 /* We also need to end the idaw at track end */
2089 if (!len_to_track_end) {
2094 idaws = idal_create_words(idaws, idaw_dst,
2103 if (blk_noretry_request(req) ||
2104 block->base->features & DASD_FEATURE_FAILFAST)
2105 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
2106 cqr->startdev = startdev;
2107 cqr->memdev = startdev;
2109 cqr->expires = 5 * 60 * HZ; /* 5 minutes */
2110 cqr->lpm = private->path_data.ppm;
2112 cqr->buildclk = get_clock();
2113 cqr->status = DASD_CQR_FILLED;
2117 static int prepare_itcw(struct itcw *itcw,
2118 unsigned int trk, unsigned int totrk, int cmd,
2119 struct dasd_device *basedev,
2120 struct dasd_device *startdev,
2121 unsigned int rec_on_trk, int count,
2122 unsigned int blksize,
2123 unsigned int total_data_size,
2125 unsigned int blk_per_trk)
2127 struct PFX_eckd_data pfxdata;
2128 struct dasd_eckd_private *basepriv, *startpriv;
2129 struct DE_eckd_data *dedata;
2130 struct LRE_eckd_data *lredata;
2134 u16 heads, beghead, endhead;
2142 /* setup prefix data */
2143 basepriv = (struct dasd_eckd_private *) basedev->private;
2144 startpriv = (struct dasd_eckd_private *) startdev->private;
2145 dedata = &pfxdata.define_extent;
2146 lredata = &pfxdata.locate_record;
2148 memset(&pfxdata, 0, sizeof(pfxdata));
2149 pfxdata.format = 1; /* PFX with LRE */
2150 pfxdata.base_address = basepriv->ned->unit_addr;
2151 pfxdata.base_lss = basepriv->ned->ID;
2152 pfxdata.validity.define_extent = 1;
2154 /* private uid is kept up to date, conf_data may be outdated */
2155 if (startpriv->uid.type != UA_BASE_DEVICE) {
2156 pfxdata.validity.verify_base = 1;
2157 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS)
2158 pfxdata.validity.hyper_pav = 1;
2162 case DASD_ECKD_CCW_READ_TRACK_DATA:
2163 dedata->mask.perm = 0x1;
2164 dedata->attributes.operation = basepriv->attrib.operation;
2165 dedata->blk_size = blksize;
2166 dedata->ga_extended |= 0x42;
2167 lredata->operation.orientation = 0x0;
2168 lredata->operation.operation = 0x0C;
2169 lredata->auxiliary.check_bytes = 0x01;
2170 pfx_cmd = DASD_ECKD_CCW_PFX_READ;
2172 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
2173 dedata->mask.perm = 0x02;
2174 dedata->attributes.operation = basepriv->attrib.operation;
2175 dedata->blk_size = blksize;
2176 rc = check_XRC_on_prefix(&pfxdata, basedev);
2177 dedata->ga_extended |= 0x42;
2178 lredata->operation.orientation = 0x0;
2179 lredata->operation.operation = 0x3F;
2180 lredata->extended_operation = 0x23;
2181 lredata->auxiliary.check_bytes = 0x2;
2182 pfx_cmd = DASD_ECKD_CCW_PFX;
2185 DBF_DEV_EVENT(DBF_ERR, basedev,
2186 "prepare itcw, unknown opcode 0x%x", cmd);
2193 dedata->attributes.mode = 0x3; /* ECKD */
2195 heads = basepriv->rdc_data.trk_per_cyl;
2196 begcyl = trk / heads;
2197 beghead = trk % heads;
2198 endcyl = totrk / heads;
2199 endhead = totrk % heads;
2201 /* check for sequential prestage - enhance cylinder range */
2202 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE ||
2203 dedata->attributes.operation == DASD_SEQ_ACCESS) {
2205 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl)
2206 endcyl += basepriv->attrib.nr_cyl;
2208 endcyl = (basepriv->real_cyl - 1);
2211 set_ch_t(&dedata->beg_ext, begcyl, beghead);
2212 set_ch_t(&dedata->end_ext, endcyl, endhead);
2214 dedata->ep_format = 0x20; /* records per track is valid */
2215 dedata->ep_rec_per_track = blk_per_trk;
2218 switch (basepriv->rdc_data.dev_type) {
2220 dn = ceil_quot(blksize + 6, 232);
2221 d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34);
2222 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
2225 d = 7 + ceil_quot(blksize + 12, 32);
2226 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
2231 lredata->auxiliary.length_valid = 1;
2232 lredata->auxiliary.length_scope = 1;
2233 lredata->auxiliary.imbedded_ccw_valid = 1;
2234 lredata->length = tlf;
2235 lredata->imbedded_ccw = cmd;
2236 lredata->count = count;
2237 lredata->sector = sector;
2238 set_ch_t(&lredata->seek_addr, begcyl, beghead);
2239 lredata->search_arg.cyl = lredata->seek_addr.cyl;
2240 lredata->search_arg.head = lredata->seek_addr.head;
2241 lredata->search_arg.record = rec_on_trk;
2243 dcw = itcw_add_dcw(itcw, pfx_cmd, 0,
2244 &pfxdata, sizeof(pfxdata), total_data_size);
2249 static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track(
2250 struct dasd_device *startdev,
2251 struct dasd_block *block,
2252 struct request *req,
2257 unsigned int first_offs,
2258 unsigned int last_offs,
2259 unsigned int blk_per_trk,
2260 unsigned int blksize)
2262 struct dasd_eckd_private *private;
2263 struct dasd_ccw_req *cqr;
2264 struct req_iterator iter;
2267 unsigned int trkcount, ctidaw;
2269 struct dasd_device *basedev;
2272 struct tidaw *last_tidaw = NULL;
2276 basedev = block->base;
2277 private = (struct dasd_eckd_private *) basedev->private;
2278 if (rq_data_dir(req) == READ) {
2279 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
2280 itcw_op = ITCW_OP_READ;
2281 } else if (rq_data_dir(req) == WRITE) {
2282 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
2283 itcw_op = ITCW_OP_WRITE;
2285 return ERR_PTR(-EINVAL);
2287 /* trackbased I/O needs address all memory via TIDAWs,
2288 * not just for 64 bit addresses. This allows us to map
2289 * each segment directly to one tidaw.
2291 trkcount = last_trk - first_trk + 1;
2293 rq_for_each_segment(bv, req, iter) {
2297 /* Allocate the ccw request. */
2298 itcw_size = itcw_calc_size(0, ctidaw, 0);
2299 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev);
2304 cqr->startdev = startdev;
2305 cqr->memdev = startdev;
2307 cqr->expires = 100*HZ;
2308 cqr->buildclk = get_clock();
2309 cqr->status = DASD_CQR_FILLED;
2312 /* transfer length factor: how many bytes to read from the last track */
2313 if (first_trk == last_trk)
2314 tlf = last_offs - first_offs + 1;
2316 tlf = last_offs + 1;
2319 itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0);
2320 cqr->cpaddr = itcw_get_tcw(itcw);
2322 if (prepare_itcw(itcw, first_trk, last_trk,
2323 cmd, basedev, startdev,
2326 (last_rec - first_rec + 1) * blksize,
2327 tlf, blk_per_trk) == -EAGAIN) {
2328 /* Clock not in sync and XRC is enabled.
2331 dasd_sfree_request(cqr, startdev);
2332 return ERR_PTR(-EAGAIN);
2336 * A tidaw can address 4k of memory, but must not cross page boundaries
2337 * We can let the block layer handle this by setting
2338 * blk_queue_segment_boundary to page boundaries and
2339 * blk_max_segment_size to page size when setting up the request queue.
2341 rq_for_each_segment(bv, req, iter) {
2342 dst = page_address(bv->bv_page) + bv->bv_offset;
2343 last_tidaw = itcw_add_tidaw(itcw, 0x00, dst, bv->bv_len);
2344 if (IS_ERR(last_tidaw))
2345 return (struct dasd_ccw_req *)last_tidaw;
2348 last_tidaw->flags |= 0x80;
2349 itcw_finalize(itcw);
2351 if (blk_noretry_request(req) ||
2352 block->base->features & DASD_FEATURE_FAILFAST)
2353 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
2354 cqr->startdev = startdev;
2355 cqr->memdev = startdev;
2357 cqr->expires = 5 * 60 * HZ; /* 5 minutes */
2358 cqr->lpm = private->path_data.ppm;
2360 cqr->buildclk = get_clock();
2361 cqr->status = DASD_CQR_FILLED;
2365 static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev,
2366 struct dasd_block *block,
2367 struct request *req)
2369 int tpm, cmdrtd, cmdwtd;
2371 #if defined(CONFIG_64BIT)
2372 int fcx_in_css, fcx_in_gneq, fcx_in_features;
2374 struct dasd_eckd_private *private;
2375 struct dasd_device *basedev;
2376 sector_t first_rec, last_rec;
2377 sector_t first_trk, last_trk;
2378 unsigned int first_offs, last_offs;
2379 unsigned int blk_per_trk, blksize;
2381 struct dasd_ccw_req *cqr;
2383 basedev = block->base;
2384 private = (struct dasd_eckd_private *) basedev->private;
2386 /* Calculate number of blocks/records per track. */
2387 blksize = block->bp_block;
2388 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
2389 if (blk_per_trk == 0)
2390 return ERR_PTR(-EINVAL);
2391 /* Calculate record id of first and last block. */
2392 first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift;
2393 first_offs = sector_div(first_trk, blk_per_trk);
2394 last_rec = last_trk =
2395 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift;
2396 last_offs = sector_div(last_trk, blk_per_trk);
2397 cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk);
2399 /* is transport mode supported? */
2400 #if defined(CONFIG_64BIT)
2401 fcx_in_css = css_general_characteristics.fcx;
2402 fcx_in_gneq = private->gneq->reserved2[7] & 0x04;
2403 fcx_in_features = private->features.feature[40] & 0x80;
2404 tpm = fcx_in_css && fcx_in_gneq && fcx_in_features;
2409 /* is read track data and write track data in command mode supported? */
2410 cmdrtd = private->features.feature[9] & 0x20;
2411 cmdwtd = private->features.feature[12] & 0x40;
2412 use_prefix = private->features.feature[8] & 0x01;
2415 if (cdlspecial || dasd_page_cache) {
2416 /* do nothing, just fall through to the cmd mode single case */
2417 } else if (!dasd_nofcx && tpm && (first_trk == last_trk)) {
2418 cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req,
2419 first_rec, last_rec,
2420 first_trk, last_trk,
2421 first_offs, last_offs,
2422 blk_per_trk, blksize);
2423 if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN)
2425 } else if (use_prefix &&
2426 (((rq_data_dir(req) == READ) && cmdrtd) ||
2427 ((rq_data_dir(req) == WRITE) && cmdwtd))) {
2428 cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req,
2429 first_rec, last_rec,
2430 first_trk, last_trk,
2431 first_offs, last_offs,
2432 blk_per_trk, blksize);
2433 if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN)
2437 cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req,
2438 first_rec, last_rec,
2439 first_trk, last_trk,
2440 first_offs, last_offs,
2441 blk_per_trk, blksize);
2446 dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req)
2448 struct dasd_eckd_private *private;
2450 struct req_iterator iter;
2453 unsigned int blksize, blk_per_trk, off;
2457 if (!dasd_page_cache)
2459 private = (struct dasd_eckd_private *) cqr->block->base->private;
2460 blksize = cqr->block->bp_block;
2461 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
2462 recid = blk_rq_pos(req) >> cqr->block->s2b_shift;
2464 /* Skip over define extent & locate record. */
2466 if (private->uses_cdl == 0 || recid > 2*blk_per_trk)
2468 rq_for_each_segment(bv, req, iter) {
2469 dst = page_address(bv->bv_page) + bv->bv_offset;
2470 for (off = 0; off < bv->bv_len; off += blksize) {
2471 /* Skip locate record. */
2472 if (private->uses_cdl && recid <= 2*blk_per_trk)
2475 if (ccw->flags & CCW_FLAG_IDA)
2476 cda = *((char **)((addr_t) ccw->cda));
2478 cda = (char *)((addr_t) ccw->cda);
2480 if (rq_data_dir(req) == READ)
2481 memcpy(dst, cda, bv->bv_len);
2482 kmem_cache_free(dasd_page_cache,
2483 (void *)((addr_t)cda & PAGE_MASK));
2492 status = cqr->status == DASD_CQR_DONE;
2493 dasd_sfree_request(cqr, cqr->memdev);
2498 * Modify ccw/tcw in cqr so it can be started on a base device.
2500 * Note that this is not enough to restart the cqr!
2501 * Either reset cqr->startdev as well (summary unit check handling)
2502 * or restart via separate cqr (as in ERP handling).
2504 void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr)
2507 struct PFX_eckd_data *pfxdata;
2512 if (cqr->cpmode == 1) {
2514 tccb = tcw_get_tccb(tcw);
2515 dcw = (struct dcw *)&tccb->tca[0];
2516 pfxdata = (struct PFX_eckd_data *)&dcw->cd[0];
2517 pfxdata->validity.verify_base = 0;
2518 pfxdata->validity.hyper_pav = 0;
2521 pfxdata = cqr->data;
2522 if (ccw->cmd_code == DASD_ECKD_CCW_PFX) {
2523 pfxdata->validity.verify_base = 0;
2524 pfxdata->validity.hyper_pav = 0;
2529 #define DASD_ECKD_CHANQ_MAX_SIZE 4
2531 static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base,
2532 struct dasd_block *block,
2533 struct request *req)
2535 struct dasd_eckd_private *private;
2536 struct dasd_device *startdev;
2537 unsigned long flags;
2538 struct dasd_ccw_req *cqr;
2540 startdev = dasd_alias_get_start_dev(base);
2543 private = (struct dasd_eckd_private *) startdev->private;
2544 if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE)
2545 return ERR_PTR(-EBUSY);
2547 spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags);
2549 cqr = dasd_eckd_build_cp(startdev, block, req);
2552 spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags);
2556 static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr,
2557 struct request *req)
2559 struct dasd_eckd_private *private;
2560 unsigned long flags;
2562 spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags);
2563 private = (struct dasd_eckd_private *) cqr->memdev->private;
2565 spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags);
2566 return dasd_eckd_free_cp(cqr, req);
2570 dasd_eckd_fill_info(struct dasd_device * device,
2571 struct dasd_information2_t * info)
2573 struct dasd_eckd_private *private;
2575 private = (struct dasd_eckd_private *) device->private;
2576 info->label_block = 2;
2577 info->FBA_layout = private->uses_cdl ? 0 : 1;
2578 info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL;
2579 info->characteristics_size = sizeof(struct dasd_eckd_characteristics);
2580 memcpy(info->characteristics, &private->rdc_data,
2581 sizeof(struct dasd_eckd_characteristics));
2582 info->confdata_size = min((unsigned long)private->conf_len,
2583 sizeof(info->configuration_data));
2584 memcpy(info->configuration_data, private->conf_data,
2585 info->confdata_size);
2590 * SECTION: ioctl functions for eckd devices.
2594 * Release device ioctl.
2595 * Buils a channel programm to releases a prior reserved
2596 * (see dasd_eckd_reserve) device.
2599 dasd_eckd_release(struct dasd_device *device)
2601 struct dasd_ccw_req *cqr;
2605 if (!capable(CAP_SYS_ADMIN))
2608 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
2610 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2611 "Could not allocate initialization request");
2612 return PTR_ERR(cqr);
2615 ccw->cmd_code = DASD_ECKD_CCW_RELEASE;
2616 ccw->flags |= CCW_FLAG_SLI;
2618 ccw->cda = (__u32)(addr_t) cqr->data;
2619 cqr->startdev = device;
2620 cqr->memdev = device;
2621 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
2622 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
2623 cqr->retries = 2; /* set retry counter to enable basic ERP */
2624 cqr->expires = 2 * HZ;
2625 cqr->buildclk = get_clock();
2626 cqr->status = DASD_CQR_FILLED;
2628 rc = dasd_sleep_on_immediatly(cqr);
2630 dasd_sfree_request(cqr, cqr->memdev);
2635 * Reserve device ioctl.
2636 * Options are set to 'synchronous wait for interrupt' and
2637 * 'timeout the request'. This leads to a terminate IO if
2638 * the interrupt is outstanding for a certain time.
2641 dasd_eckd_reserve(struct dasd_device *device)
2643 struct dasd_ccw_req *cqr;
2647 if (!capable(CAP_SYS_ADMIN))
2650 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
2652 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2653 "Could not allocate initialization request");
2654 return PTR_ERR(cqr);
2657 ccw->cmd_code = DASD_ECKD_CCW_RESERVE;
2658 ccw->flags |= CCW_FLAG_SLI;
2660 ccw->cda = (__u32)(addr_t) cqr->data;
2661 cqr->startdev = device;
2662 cqr->memdev = device;
2663 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
2664 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
2665 cqr->retries = 2; /* set retry counter to enable basic ERP */
2666 cqr->expires = 2 * HZ;
2667 cqr->buildclk = get_clock();
2668 cqr->status = DASD_CQR_FILLED;
2670 rc = dasd_sleep_on_immediatly(cqr);
2672 dasd_sfree_request(cqr, cqr->memdev);
2677 * Steal lock ioctl - unconditional reserve device.
2678 * Buils a channel programm to break a device's reservation.
2679 * (unconditional reserve)
2682 dasd_eckd_steal_lock(struct dasd_device *device)
2684 struct dasd_ccw_req *cqr;
2688 if (!capable(CAP_SYS_ADMIN))
2691 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
2693 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2694 "Could not allocate initialization request");
2695 return PTR_ERR(cqr);
2698 ccw->cmd_code = DASD_ECKD_CCW_SLCK;
2699 ccw->flags |= CCW_FLAG_SLI;
2701 ccw->cda = (__u32)(addr_t) cqr->data;
2702 cqr->startdev = device;
2703 cqr->memdev = device;
2704 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
2705 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
2706 cqr->retries = 2; /* set retry counter to enable basic ERP */
2707 cqr->expires = 2 * HZ;
2708 cqr->buildclk = get_clock();
2709 cqr->status = DASD_CQR_FILLED;
2711 rc = dasd_sleep_on_immediatly(cqr);
2713 dasd_sfree_request(cqr, cqr->memdev);
2718 * Read performance statistics
2721 dasd_eckd_performance(struct dasd_device *device, void __user *argp)
2723 struct dasd_psf_prssd_data *prssdp;
2724 struct dasd_rssd_perf_stats_t *stats;
2725 struct dasd_ccw_req *cqr;
2729 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
2730 (sizeof(struct dasd_psf_prssd_data) +
2731 sizeof(struct dasd_rssd_perf_stats_t)),
2734 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2735 "Could not allocate initialization request");
2736 return PTR_ERR(cqr);
2738 cqr->startdev = device;
2739 cqr->memdev = device;
2741 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
2742 cqr->expires = 10 * HZ;
2744 /* Prepare for Read Subsystem Data */
2745 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
2746 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
2747 prssdp->order = PSF_ORDER_PRSSD;
2748 prssdp->suborder = 0x01; /* Performance Statistics */
2749 prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */
2752 ccw->cmd_code = DASD_ECKD_CCW_PSF;
2753 ccw->count = sizeof(struct dasd_psf_prssd_data);
2754 ccw->flags |= CCW_FLAG_CC;
2755 ccw->cda = (__u32)(addr_t) prssdp;
2757 /* Read Subsystem Data - Performance Statistics */
2758 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
2759 memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t));
2762 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
2763 ccw->count = sizeof(struct dasd_rssd_perf_stats_t);
2764 ccw->cda = (__u32)(addr_t) stats;
2766 cqr->buildclk = get_clock();
2767 cqr->status = DASD_CQR_FILLED;
2768 rc = dasd_sleep_on(cqr);
2770 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
2771 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
2772 if (copy_to_user(argp, stats,
2773 sizeof(struct dasd_rssd_perf_stats_t)))
2776 dasd_sfree_request(cqr, cqr->memdev);
2781 * Get attributes (cache operations)
2782 * Returnes the cache attributes used in Define Extend (DE).
2785 dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp)
2787 struct dasd_eckd_private *private =
2788 (struct dasd_eckd_private *)device->private;
2789 struct attrib_data_t attrib = private->attrib;
2792 if (!capable(CAP_SYS_ADMIN))
2798 if (copy_to_user(argp, (long *) &attrib,
2799 sizeof(struct attrib_data_t)))
2806 * Set attributes (cache operations)
2807 * Stores the attributes for cache operation to be used in Define Extend (DE).
2810 dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp)
2812 struct dasd_eckd_private *private =
2813 (struct dasd_eckd_private *)device->private;
2814 struct attrib_data_t attrib;
2816 if (!capable(CAP_SYS_ADMIN))
2821 if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t)))
2823 private->attrib = attrib;
2825 dev_info(&device->cdev->dev,
2826 "The DASD cache mode was set to %x (%i cylinder prestage)\n",
2827 private->attrib.operation, private->attrib.nr_cyl);
2832 * Issue syscall I/O to EMC Symmetrix array.
2833 * CCWs are PSF and RSSD
2835 static int dasd_symm_io(struct dasd_device *device, void __user *argp)
2837 struct dasd_symmio_parms usrparm;
2838 char *psf_data, *rssd_result;
2839 struct dasd_ccw_req *cqr;
2843 /* Copy parms from caller */
2845 if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
2847 #ifndef CONFIG_64BIT
2848 /* Make sure pointers are sane even on 31 bit. */
2849 if ((usrparm.psf_data >> 32) != 0 || (usrparm.rssd_result >> 32) != 0) {
2854 /* alloc I/O data area */
2855 psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA);
2856 rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA);
2857 if (!psf_data || !rssd_result) {
2862 /* get syscall header from user space */
2864 if (copy_from_user(psf_data,
2865 (void __user *)(unsigned long) usrparm.psf_data,
2866 usrparm.psf_data_len))
2869 /* sanity check on syscall header */
2870 if (psf_data[0] != 0x17 && psf_data[1] != 0xce) {
2875 /* setup CCWs for PSF + RSSD */
2876 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device);
2878 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2879 "Could not allocate initialization request");
2884 cqr->startdev = device;
2885 cqr->memdev = device;
2887 cqr->expires = 10 * HZ;
2888 cqr->buildclk = get_clock();
2889 cqr->status = DASD_CQR_FILLED;
2891 /* Build the ccws */
2895 ccw->cmd_code = DASD_ECKD_CCW_PSF;
2896 ccw->count = usrparm.psf_data_len;
2897 ccw->flags |= CCW_FLAG_CC;
2898 ccw->cda = (__u32)(addr_t) psf_data;
2903 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
2904 ccw->count = usrparm.rssd_result_len;
2905 ccw->flags = CCW_FLAG_SLI ;
2906 ccw->cda = (__u32)(addr_t) rssd_result;
2908 rc = dasd_sleep_on(cqr);
2913 if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result,
2914 rssd_result, usrparm.rssd_result_len))
2919 dasd_sfree_request(cqr, cqr->memdev);
2924 DBF_DEV_EVENT(DBF_WARNING, device, "Symmetrix ioctl: rc=%d", rc);
2929 dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp)
2931 struct dasd_device *device = block->base;
2935 return dasd_eckd_get_attrib(device, argp);
2937 return dasd_eckd_set_attrib(device, argp);
2939 return dasd_eckd_performance(device, argp);
2941 return dasd_eckd_release(device);
2943 return dasd_eckd_reserve(device);
2945 return dasd_eckd_steal_lock(device);
2947 return dasd_symm_io(device, argp);
2949 return -ENOIOCTLCMD;
2954 * Dump the range of CCWs into 'page' buffer
2955 * and return number of printed chars.
2958 dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page)
2964 while (from <= to) {
2965 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
2966 " CCW %p: %08X %08X DAT:",
2967 from, ((int *) from)[0], ((int *) from)[1]);
2969 /* get pointer to data (consider IDALs) */
2970 if (from->flags & CCW_FLAG_IDA)
2971 datap = (char *) *((addr_t *) (addr_t) from->cda);
2973 datap = (char *) ((addr_t) from->cda);
2975 /* dump data (max 32 bytes) */
2976 for (count = 0; count < from->count && count < 32; count++) {
2977 if (count % 8 == 0) len += sprintf(page + len, " ");
2978 if (count % 4 == 0) len += sprintf(page + len, " ");
2979 len += sprintf(page + len, "%02x", datap[count]);
2981 len += sprintf(page + len, "\n");
2988 dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb,
2993 sense = (u64 *) dasd_get_sense(irb);
2995 DBF_DEV_EVENT(DBF_EMERG, device,
2996 "%s: %s %02x%02x%02x %016llx %016llx %016llx "
2998 scsw_is_tm(&irb->scsw) ? "t" : "c",
2999 scsw_cc(&irb->scsw), scsw_cstat(&irb->scsw),
3000 scsw_dstat(&irb->scsw), sense[0], sense[1],
3001 sense[2], sense[3]);
3003 DBF_DEV_EVENT(DBF_EMERG, device, "%s",
3004 "SORRY - NO VALID SENSE AVAILABLE\n");
3009 * Print sense data and related channel program.
3010 * Parts are printed because printk buffer is only 1024 bytes.
3012 static void dasd_eckd_dump_sense_ccw(struct dasd_device *device,
3013 struct dasd_ccw_req *req, struct irb *irb)
3016 struct ccw1 *first, *last, *fail, *from, *to;
3019 page = (char *) get_zeroed_page(GFP_ATOMIC);
3021 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
3022 "No memory to dump sense data\n");
3025 /* dump the sense data */
3026 len = sprintf(page, KERN_ERR PRINTK_HEADER
3027 " I/O status report for device %s:\n",
3028 dev_name(&device->cdev->dev));
3029 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3030 " in req: %p CS: 0x%02X DS: 0x%02X CC: 0x%02X RC: %d\n",
3031 req, scsw_cstat(&irb->scsw), scsw_dstat(&irb->scsw),
3032 scsw_cc(&irb->scsw), req->intrc);
3033 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3034 " device %s: Failing CCW: %p\n",
3035 dev_name(&device->cdev->dev),
3036 (void *) (addr_t) irb->scsw.cmd.cpa);
3037 if (irb->esw.esw0.erw.cons) {
3038 for (sl = 0; sl < 4; sl++) {
3039 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3040 " Sense(hex) %2d-%2d:",
3041 (8 * sl), ((8 * sl) + 7));
3043 for (sct = 0; sct < 8; sct++) {
3044 len += sprintf(page + len, " %02x",
3045 irb->ecw[8 * sl + sct]);
3047 len += sprintf(page + len, "\n");
3050 if (irb->ecw[27] & DASD_SENSE_BIT_0) {
3051 /* 24 Byte Sense Data */
3052 sprintf(page + len, KERN_ERR PRINTK_HEADER
3053 " 24 Byte: %x MSG %x, "
3054 "%s MSGb to SYSOP\n",
3055 irb->ecw[7] >> 4, irb->ecw[7] & 0x0f,
3056 irb->ecw[1] & 0x10 ? "" : "no");
3058 /* 32 Byte Sense Data */
3059 sprintf(page + len, KERN_ERR PRINTK_HEADER
3060 " 32 Byte: Format: %x "
3061 "Exception class %x\n",
3062 irb->ecw[6] & 0x0f, irb->ecw[22] >> 4);
3065 sprintf(page + len, KERN_ERR PRINTK_HEADER
3066 " SORRY - NO VALID SENSE AVAILABLE\n");
3071 /* req == NULL for unsolicited interrupts */
3072 /* dump the Channel Program (max 140 Bytes per line) */
3073 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */
3074 first = req->cpaddr;
3075 for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++);
3076 to = min(first + 6, last);
3077 len = sprintf(page, KERN_ERR PRINTK_HEADER
3078 " Related CP in req: %p\n", req);
3079 dasd_eckd_dump_ccw_range(first, to, page + len);
3082 /* print failing CCW area (maximum 4) */
3083 /* scsw->cda is either valid or zero */
3086 fail = (struct ccw1 *)(addr_t)
3087 irb->scsw.cmd.cpa; /* failing CCW */
3088 if (from < fail - 2) {
3089 from = fail - 2; /* there is a gap - print header */
3090 len += sprintf(page, KERN_ERR PRINTK_HEADER "......\n");
3092 to = min(fail + 1, last);
3093 len += dasd_eckd_dump_ccw_range(from, to, page + len);
3095 /* print last CCWs (maximum 2) */
3096 from = max(from, ++to);
3097 if (from < last - 1) {
3098 from = last - 1; /* there is a gap - print header */
3099 len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n");
3101 len += dasd_eckd_dump_ccw_range(from, last, page + len);
3105 free_page((unsigned long) page);
3110 * Print sense data from a tcw.
3112 static void dasd_eckd_dump_sense_tcw(struct dasd_device *device,
3113 struct dasd_ccw_req *req, struct irb *irb)
3116 int len, sl, sct, residual;
3122 page = (char *) get_zeroed_page(GFP_ATOMIC);
3124 DBF_DEV_EVENT(DBF_WARNING, device, " %s",
3125 "No memory to dump sense data");
3128 /* dump the sense data */
3129 len = sprintf(page, KERN_ERR PRINTK_HEADER
3130 " I/O status report for device %s:\n",
3131 dev_name(&device->cdev->dev));
3132 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3133 " in req: %p CS: 0x%02X DS: 0x%02X CC: 0x%02X RC: %d "
3134 "fcxs: 0x%02X schxs: 0x%02X\n", req,
3135 scsw_cstat(&irb->scsw), scsw_dstat(&irb->scsw),
3136 scsw_cc(&irb->scsw), req->intrc,
3137 irb->scsw.tm.fcxs, irb->scsw.tm.schxs);
3138 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3139 " device %s: Failing TCW: %p\n",
3140 dev_name(&device->cdev->dev),
3141 (void *) (addr_t) irb->scsw.tm.tcw);
3145 if (irb->scsw.tm.tcw)
3147 (struct tcw *)(unsigned long)irb->scsw.tm.tcw);
3149 if (tsb && (irb->scsw.tm.fcxs == 0x01)) {
3150 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3151 " tsb->length %d\n", tsb->length);
3152 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3153 " tsb->flags %x\n", tsb->flags);
3154 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3155 " tsb->dcw_offset %d\n", tsb->dcw_offset);
3156 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3157 " tsb->count %d\n", tsb->count);
3158 residual = tsb->count - 28;
3159 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3160 " residual %d\n", residual);
3162 switch (tsb->flags & 0x07) {
3163 case 1: /* tsa_iostat */
3164 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3165 " tsb->tsa.iostat.dev_time %d\n",
3166 tsb->tsa.iostat.dev_time);
3167 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3168 " tsb->tsa.iostat.def_time %d\n",
3169 tsb->tsa.iostat.def_time);
3170 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3171 " tsb->tsa.iostat.queue_time %d\n",
3172 tsb->tsa.iostat.queue_time);
3173 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3174 " tsb->tsa.iostat.dev_busy_time %d\n",
3175 tsb->tsa.iostat.dev_busy_time);
3176 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3177 " tsb->tsa.iostat.dev_act_time %d\n",
3178 tsb->tsa.iostat.dev_act_time);
3179 sense = tsb->tsa.iostat.sense;
3181 case 2: /* ts_ddpc */
3182 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3183 " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc);
3184 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3185 " tsb->tsa.ddpc.rcq: ");
3186 for (sl = 0; sl < 16; sl++) {
3187 for (sct = 0; sct < 8; sct++) {
3188 len += sprintf(page + len, " %02x",
3189 tsb->tsa.ddpc.rcq[sl]);
3191 len += sprintf(page + len, "\n");
3193 sense = tsb->tsa.ddpc.sense;
3195 case 3: /* tsa_intrg */
3196 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3197 " tsb->tsa.intrg.: not supportet yet \n");
3202 for (sl = 0; sl < 4; sl++) {
3203 len += sprintf(page + len,
3204 KERN_ERR PRINTK_HEADER
3205 " Sense(hex) %2d-%2d:",
3206 (8 * sl), ((8 * sl) + 7));
3207 for (sct = 0; sct < 8; sct++) {
3208 len += sprintf(page + len, " %02x",
3209 sense[8 * sl + sct]);
3211 len += sprintf(page + len, "\n");
3214 if (sense[27] & DASD_SENSE_BIT_0) {
3215 /* 24 Byte Sense Data */
3216 sprintf(page + len, KERN_ERR PRINTK_HEADER
3217 " 24 Byte: %x MSG %x, "
3218 "%s MSGb to SYSOP\n",
3219 sense[7] >> 4, sense[7] & 0x0f,
3220 sense[1] & 0x10 ? "" : "no");
3222 /* 32 Byte Sense Data */
3223 sprintf(page + len, KERN_ERR PRINTK_HEADER
3224 " 32 Byte: Format: %x "
3225 "Exception class %x\n",
3226 sense[6] & 0x0f, sense[22] >> 4);
3229 sprintf(page + len, KERN_ERR PRINTK_HEADER
3230 " SORRY - NO VALID SENSE AVAILABLE\n");
3233 sprintf(page + len, KERN_ERR PRINTK_HEADER
3234 " SORRY - NO TSB DATA AVAILABLE\n");
3237 free_page((unsigned long) page);
3240 static void dasd_eckd_dump_sense(struct dasd_device *device,
3241 struct dasd_ccw_req *req, struct irb *irb)
3243 if (req && scsw_is_tm(&req->irb.scsw))
3244 dasd_eckd_dump_sense_tcw(device, req, irb);
3246 dasd_eckd_dump_sense_ccw(device, req, irb);
3249 int dasd_eckd_pm_freeze(struct dasd_device *device)
3252 * the device should be disconnected from our LCU structure
3253 * on restore we will reconnect it and reread LCU specific
3254 * information like PAV support that might have changed
3256 dasd_alias_remove_device(device);
3257 dasd_alias_disconnect_device_from_lcu(device);
3262 int dasd_eckd_restore_device(struct dasd_device *device)
3264 struct dasd_eckd_private *private;
3265 struct dasd_eckd_characteristics temp_rdc_data;
3267 struct dasd_uid temp_uid;
3268 unsigned long flags;
3270 private = (struct dasd_eckd_private *) device->private;
3272 /* Read Configuration Data */
3273 rc = dasd_eckd_read_conf(device);
3277 /* Generate device unique id and register in devmap */
3278 rc = dasd_eckd_generate_uid(device, &private->uid);
3279 dasd_get_uid(device->cdev, &temp_uid);
3280 if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0)
3281 dev_err(&device->cdev->dev, "The UID of the DASD has "
3285 dasd_set_uid(device->cdev, &private->uid);
3287 /* register lcu with alias handling, enable PAV if this is a new lcu */
3288 is_known = dasd_alias_make_device_known_to_lcu(device);
3292 dasd_eckd_validate_server(device);
3293 dasd_alias_lcu_setup_complete(device);
3295 dasd_alias_wait_for_lcu_setup(device);
3297 /* RE-Read Configuration Data */
3298 rc = dasd_eckd_read_conf(device);
3302 /* Read Feature Codes */
3303 dasd_eckd_read_features(device);
3305 /* Read Device Characteristics */
3306 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
3307 &temp_rdc_data, 64);
3309 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
3310 "Read device characteristic failed, rc=%d", rc);
3313 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
3314 memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data));
3315 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
3317 /* add device to alias management */
3318 dasd_alias_add_device(device);
3326 static struct ccw_driver dasd_eckd_driver = {
3327 .name = "dasd-eckd",
3328 .owner = THIS_MODULE,
3329 .ids = dasd_eckd_ids,
3330 .probe = dasd_eckd_probe,
3331 .remove = dasd_generic_remove,
3332 .set_offline = dasd_generic_set_offline,
3333 .set_online = dasd_eckd_set_online,
3334 .notify = dasd_generic_notify,
3335 .freeze = dasd_generic_pm_freeze,
3336 .thaw = dasd_generic_restore_device,
3337 .restore = dasd_generic_restore_device,
3341 * max_blocks is dependent on the amount of storage that is available
3342 * in the static io buffer for each device. Currently each device has
3343 * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has
3344 * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use
3345 * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In
3346 * addition we have one define extent ccw + 16 bytes of data and one
3347 * locate record ccw + 16 bytes of data. That makes:
3348 * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum.
3349 * We want to fit two into the available memory so that we can immediately
3350 * start the next request if one finishes off. That makes 249.5 blocks
3351 * for one request. Give a little safety and the result is 240.
3353 static struct dasd_discipline dasd_eckd_discipline = {
3354 .owner = THIS_MODULE,
3358 .check_device = dasd_eckd_check_characteristics,
3359 .uncheck_device = dasd_eckd_uncheck_device,
3360 .do_analysis = dasd_eckd_do_analysis,
3361 .ready_to_online = dasd_eckd_ready_to_online,
3362 .online_to_ready = dasd_eckd_online_to_ready,
3363 .fill_geometry = dasd_eckd_fill_geometry,
3364 .start_IO = dasd_start_IO,
3365 .term_IO = dasd_term_IO,
3366 .handle_terminated_request = dasd_eckd_handle_terminated_request,
3367 .format_device = dasd_eckd_format_device,
3368 .erp_action = dasd_eckd_erp_action,
3369 .erp_postaction = dasd_eckd_erp_postaction,
3370 .handle_unsolicited_interrupt = dasd_eckd_handle_unsolicited_interrupt,
3371 .build_cp = dasd_eckd_build_alias_cp,
3372 .free_cp = dasd_eckd_free_alias_cp,
3373 .dump_sense = dasd_eckd_dump_sense,
3374 .dump_sense_dbf = dasd_eckd_dump_sense_dbf,
3375 .fill_info = dasd_eckd_fill_info,
3376 .ioctl = dasd_eckd_ioctl,
3377 .freeze = dasd_eckd_pm_freeze,
3378 .restore = dasd_eckd_restore_device,
3382 dasd_eckd_init(void)
3386 ASCEBC(dasd_eckd_discipline.ebcname, 4);
3387 ret = ccw_driver_register(&dasd_eckd_driver);
3389 wait_for_device_probe();
3395 dasd_eckd_cleanup(void)
3397 ccw_driver_unregister(&dasd_eckd_driver);
3400 module_init(dasd_eckd_init);
3401 module_exit(dasd_eckd_cleanup);