1 // SPDX-License-Identifier: GPL-2.0
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/compat.h>
22 #include <linux/init.h>
23 #include <linux/seq_file.h>
25 #include <asm/css_chars.h>
26 #include <asm/debug.h>
27 #include <asm/idals.h>
28 #include <asm/ebcdic.h>
30 #include <linux/uaccess.h>
32 #include <asm/ccwdev.h>
34 #include <asm/schid.h>
35 #include <asm/chpid.h>
38 #include "dasd_eckd.h"
42 #endif /* PRINTK_HEADER */
43 #define PRINTK_HEADER "dasd(eckd):"
45 #define ECKD_C0(i) (i->home_bytes)
46 #define ECKD_F(i) (i->formula)
47 #define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\
48 (i->factors.f_0x02.f1))
49 #define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\
50 (i->factors.f_0x02.f2))
51 #define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\
52 (i->factors.f_0x02.f3))
53 #define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0)
54 #define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0)
55 #define ECKD_F6(i) (i->factor6)
56 #define ECKD_F7(i) (i->factor7)
57 #define ECKD_F8(i) (i->factor8)
60 * raw track access always map to 64k in memory
61 * so it maps to 16 blocks of 4k per track
63 #define DASD_RAW_BLOCK_PER_TRACK 16
64 #define DASD_RAW_BLOCKSIZE 4096
65 /* 64k are 128 x 512 byte sectors */
66 #define DASD_RAW_SECTORS_PER_TRACK 128
68 MODULE_LICENSE("GPL");
70 static struct dasd_discipline dasd_eckd_discipline;
72 /* The ccw bus type uses this table to find devices that it sends to
74 static struct ccw_device_id dasd_eckd_ids[] = {
75 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1},
76 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2},
77 { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3380, 0), .driver_info = 0x3},
78 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4},
79 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5},
80 { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6},
81 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7},
82 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8},
83 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9},
84 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa},
85 { /* end of list */ },
88 MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids);
90 static struct ccw_driver dasd_eckd_driver; /* see below */
92 static void *rawpadpage;
95 #define INIT_CQR_UNFORMATTED 1
96 #define INIT_CQR_ERROR 2
98 /* emergency request for reserve/release */
100 struct dasd_ccw_req cqr;
104 static DEFINE_MUTEX(dasd_reserve_mutex);
106 /* definitions for the path verification worker */
107 struct path_verification_work_data {
108 struct work_struct worker;
109 struct dasd_device *device;
110 struct dasd_ccw_req cqr;
112 __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE];
116 static struct path_verification_work_data *path_verification_worker;
117 static DEFINE_MUTEX(dasd_path_verification_mutex);
119 struct check_attention_work_data {
120 struct work_struct worker;
121 struct dasd_device *device;
125 static int prepare_itcw(struct itcw *, unsigned int, unsigned int, int,
126 struct dasd_device *, struct dasd_device *,
127 unsigned int, int, unsigned int, unsigned int,
128 unsigned int, unsigned int);
130 /* initial attempt at a probe function. this can be simplified once
131 * the other detection code is gone */
133 dasd_eckd_probe (struct ccw_device *cdev)
137 /* set ECKD specific ccw-device options */
138 ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE |
139 CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH);
141 DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s",
142 "dasd_eckd_probe: could not set "
143 "ccw-device options");
146 ret = dasd_generic_probe(cdev, &dasd_eckd_discipline);
151 dasd_eckd_set_online(struct ccw_device *cdev)
153 return dasd_generic_set_online(cdev, &dasd_eckd_discipline);
156 static const int sizes_trk0[] = { 28, 148, 84 };
157 #define LABEL_SIZE 140
159 /* head and record addresses of count_area read in analysis ccw */
160 static const int count_area_head[] = { 0, 0, 0, 0, 2 };
161 static const int count_area_rec[] = { 1, 2, 3, 4, 1 };
163 static inline unsigned int
164 round_up_multiple(unsigned int no, unsigned int mult)
167 return (rem ? no - rem + mult : no);
170 static inline unsigned int
171 ceil_quot(unsigned int d1, unsigned int d2)
173 return (d1 + (d2 - 1)) / d2;
177 recs_per_track(struct dasd_eckd_characteristics * rdc,
178 unsigned int kl, unsigned int dl)
182 switch (rdc->dev_type) {
185 return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) +
186 ceil_quot(dl + 12, 32));
188 return 1499 / (15 + ceil_quot(dl + 12, 32));
190 dn = ceil_quot(dl + 6, 232) + 1;
192 kn = ceil_quot(kl + 6, 232) + 1;
193 return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) +
194 9 + ceil_quot(dl + 6 * dn, 34));
196 return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34));
198 dn = ceil_quot(dl + 6, 232) + 1;
200 kn = ceil_quot(kl + 6, 232) + 1;
201 return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) +
202 ceil_quot(dl + 6 * dn, 34));
204 return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34));
209 static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head)
211 geo->cyl = (__u16) cyl;
212 geo->head = cyl >> 16;
217 static int set_timestamp(struct ccw1 *ccw, struct DE_eckd_data *data,
218 struct dasd_device *device)
220 struct dasd_eckd_private *private = device->private;
223 rc = get_phys_clock(&data->ep_sys_time);
225 * Ignore return code if XRC is not supported or
226 * sync clock is switched off
228 if ((rc && !private->rdc_data.facilities.XRC_supported) ||
229 rc == -EOPNOTSUPP || rc == -EACCES)
232 /* switch on System Time Stamp - needed for XRC Support */
233 data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */
234 data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */
237 ccw->count = sizeof(struct DE_eckd_data);
238 ccw->flags |= CCW_FLAG_SLI;
245 define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk,
246 unsigned int totrk, int cmd, struct dasd_device *device,
249 struct dasd_eckd_private *private = device->private;
250 u16 heads, beghead, endhead;
255 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT;
258 ccw->cda = (__u32)__pa(data);
261 memset(data, 0, sizeof(struct DE_eckd_data));
263 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
264 case DASD_ECKD_CCW_READ_RECORD_ZERO:
265 case DASD_ECKD_CCW_READ:
266 case DASD_ECKD_CCW_READ_MT:
267 case DASD_ECKD_CCW_READ_CKD:
268 case DASD_ECKD_CCW_READ_CKD_MT:
269 case DASD_ECKD_CCW_READ_KD:
270 case DASD_ECKD_CCW_READ_KD_MT:
271 data->mask.perm = 0x1;
272 data->attributes.operation = private->attrib.operation;
274 case DASD_ECKD_CCW_READ_COUNT:
275 data->mask.perm = 0x1;
276 data->attributes.operation = DASD_BYPASS_CACHE;
278 case DASD_ECKD_CCW_READ_TRACK:
279 case DASD_ECKD_CCW_READ_TRACK_DATA:
280 data->mask.perm = 0x1;
281 data->attributes.operation = private->attrib.operation;
284 case DASD_ECKD_CCW_WRITE:
285 case DASD_ECKD_CCW_WRITE_MT:
286 case DASD_ECKD_CCW_WRITE_KD:
287 case DASD_ECKD_CCW_WRITE_KD_MT:
288 data->mask.perm = 0x02;
289 data->attributes.operation = private->attrib.operation;
290 rc = set_timestamp(ccw, data, device);
292 case DASD_ECKD_CCW_WRITE_CKD:
293 case DASD_ECKD_CCW_WRITE_CKD_MT:
294 data->attributes.operation = DASD_BYPASS_CACHE;
295 rc = set_timestamp(ccw, data, device);
297 case DASD_ECKD_CCW_ERASE:
298 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
299 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
300 data->mask.perm = 0x3;
301 data->mask.auth = 0x1;
302 data->attributes.operation = DASD_BYPASS_CACHE;
303 rc = set_timestamp(ccw, data, device);
305 case DASD_ECKD_CCW_WRITE_FULL_TRACK:
306 data->mask.perm = 0x03;
307 data->attributes.operation = private->attrib.operation;
310 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
311 data->mask.perm = 0x02;
312 data->attributes.operation = private->attrib.operation;
313 data->blk_size = blksize;
314 rc = set_timestamp(ccw, data, device);
317 dev_err(&device->cdev->dev,
318 "0x%x is not a known command\n", cmd);
322 data->attributes.mode = 0x3; /* ECKD */
324 if ((private->rdc_data.cu_type == 0x2105 ||
325 private->rdc_data.cu_type == 0x2107 ||
326 private->rdc_data.cu_type == 0x1750)
327 && !(private->uses_cdl && trk < 2))
328 data->ga_extended |= 0x40; /* Regular Data Format Mode */
330 heads = private->rdc_data.trk_per_cyl;
331 begcyl = trk / heads;
332 beghead = trk % heads;
333 endcyl = totrk / heads;
334 endhead = totrk % heads;
336 /* check for sequential prestage - enhance cylinder range */
337 if (data->attributes.operation == DASD_SEQ_PRESTAGE ||
338 data->attributes.operation == DASD_SEQ_ACCESS) {
340 if (endcyl + private->attrib.nr_cyl < private->real_cyl)
341 endcyl += private->attrib.nr_cyl;
343 endcyl = (private->real_cyl - 1);
346 set_ch_t(&data->beg_ext, begcyl, beghead);
347 set_ch_t(&data->end_ext, endcyl, endhead);
352 static void locate_record_ext(struct ccw1 *ccw, struct LRE_eckd_data *data,
353 unsigned int trk, unsigned int rec_on_trk,
354 int count, int cmd, struct dasd_device *device,
355 unsigned int reclen, unsigned int tlf)
357 struct dasd_eckd_private *private = device->private;
362 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD_EXT;
364 if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK)
368 ccw->cda = (__u32)__pa(data);
371 memset(data, 0, sizeof(*data));
374 switch (private->rdc_data.dev_type) {
376 dn = ceil_quot(reclen + 6, 232);
377 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
378 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
381 d = 7 + ceil_quot(reclen + 12, 32);
382 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
386 data->sector = sector;
387 /* note: meaning of count depends on the operation
388 * for record based I/O it's the number of records, but for
389 * track based I/O it's the number of tracks
393 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
394 data->operation.orientation = 0x3;
395 data->operation.operation = 0x03;
397 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
398 data->operation.orientation = 0x3;
399 data->operation.operation = 0x16;
401 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
402 data->operation.orientation = 0x1;
403 data->operation.operation = 0x03;
406 case DASD_ECKD_CCW_READ_RECORD_ZERO:
407 data->operation.orientation = 0x3;
408 data->operation.operation = 0x16;
411 case DASD_ECKD_CCW_WRITE:
412 case DASD_ECKD_CCW_WRITE_MT:
413 case DASD_ECKD_CCW_WRITE_KD:
414 case DASD_ECKD_CCW_WRITE_KD_MT:
415 data->auxiliary.length_valid = 0x1;
416 data->length = reclen;
417 data->operation.operation = 0x01;
419 case DASD_ECKD_CCW_WRITE_CKD:
420 case DASD_ECKD_CCW_WRITE_CKD_MT:
421 data->auxiliary.length_valid = 0x1;
422 data->length = reclen;
423 data->operation.operation = 0x03;
425 case DASD_ECKD_CCW_WRITE_FULL_TRACK:
426 data->operation.orientation = 0x0;
427 data->operation.operation = 0x3F;
428 data->extended_operation = 0x11;
430 data->extended_parameter_length = 0x02;
431 if (data->count > 8) {
432 data->extended_parameter[0] = 0xFF;
433 data->extended_parameter[1] = 0xFF;
434 data->extended_parameter[1] <<= (16 - count);
436 data->extended_parameter[0] = 0xFF;
437 data->extended_parameter[0] <<= (8 - count);
438 data->extended_parameter[1] = 0x00;
442 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
443 data->auxiliary.length_valid = 0x1;
444 data->length = reclen; /* not tlf, as one might think */
445 data->operation.operation = 0x3F;
446 data->extended_operation = 0x23;
448 case DASD_ECKD_CCW_READ:
449 case DASD_ECKD_CCW_READ_MT:
450 case DASD_ECKD_CCW_READ_KD:
451 case DASD_ECKD_CCW_READ_KD_MT:
452 data->auxiliary.length_valid = 0x1;
453 data->length = reclen;
454 data->operation.operation = 0x06;
456 case DASD_ECKD_CCW_READ_CKD:
457 case DASD_ECKD_CCW_READ_CKD_MT:
458 data->auxiliary.length_valid = 0x1;
459 data->length = reclen;
460 data->operation.operation = 0x16;
462 case DASD_ECKD_CCW_READ_COUNT:
463 data->operation.operation = 0x06;
465 case DASD_ECKD_CCW_READ_TRACK:
466 data->operation.orientation = 0x1;
467 data->operation.operation = 0x0C;
468 data->extended_parameter_length = 0;
471 case DASD_ECKD_CCW_READ_TRACK_DATA:
472 data->auxiliary.length_valid = 0x1;
474 data->operation.operation = 0x0C;
476 case DASD_ECKD_CCW_ERASE:
477 data->length = reclen;
478 data->auxiliary.length_valid = 0x1;
479 data->operation.operation = 0x0b;
482 DBF_DEV_EVENT(DBF_ERR, device,
483 "fill LRE unknown opcode 0x%x", cmd);
486 set_ch_t(&data->seek_addr,
487 trk / private->rdc_data.trk_per_cyl,
488 trk % private->rdc_data.trk_per_cyl);
489 data->search_arg.cyl = data->seek_addr.cyl;
490 data->search_arg.head = data->seek_addr.head;
491 data->search_arg.record = rec_on_trk;
494 static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
495 unsigned int trk, unsigned int totrk, int cmd,
496 struct dasd_device *basedev, struct dasd_device *startdev,
497 unsigned int format, unsigned int rec_on_trk, int count,
498 unsigned int blksize, unsigned int tlf)
500 struct dasd_eckd_private *basepriv, *startpriv;
501 struct LRE_eckd_data *lredata;
502 struct DE_eckd_data *dedata;
505 basepriv = basedev->private;
506 startpriv = startdev->private;
507 dedata = &pfxdata->define_extent;
508 lredata = &pfxdata->locate_record;
510 ccw->cmd_code = DASD_ECKD_CCW_PFX;
512 if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) {
513 ccw->count = sizeof(*pfxdata) + 2;
514 ccw->cda = (__u32) __pa(pfxdata);
515 memset(pfxdata, 0, sizeof(*pfxdata) + 2);
517 ccw->count = sizeof(*pfxdata);
518 ccw->cda = (__u32) __pa(pfxdata);
519 memset(pfxdata, 0, sizeof(*pfxdata));
524 DBF_DEV_EVENT(DBF_ERR, basedev,
525 "PFX LRE unknown format 0x%x", format);
529 pfxdata->format = format;
530 pfxdata->base_address = basepriv->ned->unit_addr;
531 pfxdata->base_lss = basepriv->ned->ID;
532 pfxdata->validity.define_extent = 1;
534 /* private uid is kept up to date, conf_data may be outdated */
535 if (startpriv->uid.type == UA_BASE_PAV_ALIAS)
536 pfxdata->validity.verify_base = 1;
538 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) {
539 pfxdata->validity.verify_base = 1;
540 pfxdata->validity.hyper_pav = 1;
543 rc = define_extent(NULL, dedata, trk, totrk, cmd, basedev, blksize);
546 * For some commands the System Time Stamp is set in the define extent
547 * data when XRC is supported. The validity of the time stamp must be
548 * reflected in the prefix data as well.
550 if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02)
551 pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */
554 locate_record_ext(NULL, lredata, trk, rec_on_trk, count, cmd,
555 basedev, blksize, tlf);
561 static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
562 unsigned int trk, unsigned int totrk, int cmd,
563 struct dasd_device *basedev, struct dasd_device *startdev)
565 return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev,
570 locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk,
571 unsigned int rec_on_trk, int no_rec, int cmd,
572 struct dasd_device * device, int reclen)
574 struct dasd_eckd_private *private = device->private;
578 DBF_DEV_EVENT(DBF_INFO, device,
579 "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d",
580 trk, rec_on_trk, no_rec, cmd, reclen);
582 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD;
585 ccw->cda = (__u32) __pa(data);
587 memset(data, 0, sizeof(struct LO_eckd_data));
590 switch (private->rdc_data.dev_type) {
592 dn = ceil_quot(reclen + 6, 232);
593 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
594 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
597 d = 7 + ceil_quot(reclen + 12, 32);
598 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
602 data->sector = sector;
603 data->count = no_rec;
605 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
606 data->operation.orientation = 0x3;
607 data->operation.operation = 0x03;
609 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
610 data->operation.orientation = 0x3;
611 data->operation.operation = 0x16;
613 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
614 data->operation.orientation = 0x1;
615 data->operation.operation = 0x03;
618 case DASD_ECKD_CCW_READ_RECORD_ZERO:
619 data->operation.orientation = 0x3;
620 data->operation.operation = 0x16;
623 case DASD_ECKD_CCW_WRITE:
624 case DASD_ECKD_CCW_WRITE_MT:
625 case DASD_ECKD_CCW_WRITE_KD:
626 case DASD_ECKD_CCW_WRITE_KD_MT:
627 data->auxiliary.last_bytes_used = 0x1;
628 data->length = reclen;
629 data->operation.operation = 0x01;
631 case DASD_ECKD_CCW_WRITE_CKD:
632 case DASD_ECKD_CCW_WRITE_CKD_MT:
633 data->auxiliary.last_bytes_used = 0x1;
634 data->length = reclen;
635 data->operation.operation = 0x03;
637 case DASD_ECKD_CCW_READ:
638 case DASD_ECKD_CCW_READ_MT:
639 case DASD_ECKD_CCW_READ_KD:
640 case DASD_ECKD_CCW_READ_KD_MT:
641 data->auxiliary.last_bytes_used = 0x1;
642 data->length = reclen;
643 data->operation.operation = 0x06;
645 case DASD_ECKD_CCW_READ_CKD:
646 case DASD_ECKD_CCW_READ_CKD_MT:
647 data->auxiliary.last_bytes_used = 0x1;
648 data->length = reclen;
649 data->operation.operation = 0x16;
651 case DASD_ECKD_CCW_READ_COUNT:
652 data->operation.operation = 0x06;
654 case DASD_ECKD_CCW_ERASE:
655 data->length = reclen;
656 data->auxiliary.last_bytes_used = 0x1;
657 data->operation.operation = 0x0b;
660 DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record "
663 set_ch_t(&data->seek_addr,
664 trk / private->rdc_data.trk_per_cyl,
665 trk % private->rdc_data.trk_per_cyl);
666 data->search_arg.cyl = data->seek_addr.cyl;
667 data->search_arg.head = data->seek_addr.head;
668 data->search_arg.record = rec_on_trk;
672 * Returns 1 if the block is one of the special blocks that needs
673 * to get read/written with the KD variant of the command.
674 * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and
675 * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT.
676 * Luckily the KD variants differ only by one bit (0x08) from the
677 * normal variant. So don't wonder about code like:
678 * if (dasd_eckd_cdl_special(blk_per_trk, recid))
679 * ccw->cmd_code |= 0x8;
682 dasd_eckd_cdl_special(int blk_per_trk, int recid)
686 if (recid < blk_per_trk)
688 if (recid < 2 * blk_per_trk)
694 * Returns the record size for the special blocks of the cdl format.
695 * Only returns something useful if dasd_eckd_cdl_special is true
699 dasd_eckd_cdl_reclen(int recid)
702 return sizes_trk0[recid];
705 /* create unique id from private structure. */
706 static void create_uid(struct dasd_eckd_private *private)
709 struct dasd_uid *uid;
712 memset(uid, 0, sizeof(struct dasd_uid));
713 memcpy(uid->vendor, private->ned->HDA_manufacturer,
714 sizeof(uid->vendor) - 1);
715 EBCASC(uid->vendor, sizeof(uid->vendor) - 1);
716 memcpy(uid->serial, private->ned->HDA_location,
717 sizeof(uid->serial) - 1);
718 EBCASC(uid->serial, sizeof(uid->serial) - 1);
719 uid->ssid = private->gneq->subsystemID;
720 uid->real_unit_addr = private->ned->unit_addr;
722 uid->type = private->sneq->sua_flags;
723 if (uid->type == UA_BASE_PAV_ALIAS)
724 uid->base_unit_addr = private->sneq->base_unit_addr;
726 uid->type = UA_BASE_DEVICE;
728 if (private->vdsneq) {
729 for (count = 0; count < 16; count++) {
730 sprintf(uid->vduit+2*count, "%02x",
731 private->vdsneq->uit[count]);
737 * Generate device unique id that specifies the physical device.
739 static int dasd_eckd_generate_uid(struct dasd_device *device)
741 struct dasd_eckd_private *private = device->private;
746 if (!private->ned || !private->gneq)
748 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
750 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
754 static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid)
756 struct dasd_eckd_private *private = device->private;
760 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
762 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
769 * compare device UID with data of a given dasd_eckd_private structure
772 static int dasd_eckd_compare_path_uid(struct dasd_device *device,
773 struct dasd_eckd_private *private)
775 struct dasd_uid device_uid;
778 dasd_eckd_get_uid(device, &device_uid);
780 return memcmp(&device_uid, &private->uid, sizeof(struct dasd_uid));
783 static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device,
784 struct dasd_ccw_req *cqr,
790 * buffer has to start with EBCDIC "V1.0" to show
791 * support for virtual device SNEQ
793 rcd_buffer[0] = 0xE5;
794 rcd_buffer[1] = 0xF1;
795 rcd_buffer[2] = 0x4B;
796 rcd_buffer[3] = 0xF0;
799 ccw->cmd_code = DASD_ECKD_CCW_RCD;
801 ccw->cda = (__u32)(addr_t)rcd_buffer;
802 ccw->count = DASD_ECKD_RCD_DATA_SIZE;
803 cqr->magic = DASD_ECKD_MAGIC;
805 cqr->startdev = device;
806 cqr->memdev = device;
808 cqr->expires = 10*HZ;
811 cqr->buildclk = get_tod_clock();
812 cqr->status = DASD_CQR_FILLED;
813 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags);
817 * Wakeup helper for read_conf
818 * if the cqr is not done and needs some error recovery
819 * the buffer has to be re-initialized with the EBCDIC "V1.0"
820 * to show support for virtual device SNEQ
822 static void read_conf_cb(struct dasd_ccw_req *cqr, void *data)
827 if (cqr->status != DASD_CQR_DONE) {
829 rcd_buffer = (__u8 *)((addr_t) ccw->cda);
830 memset(rcd_buffer, 0, sizeof(*rcd_buffer));
832 rcd_buffer[0] = 0xE5;
833 rcd_buffer[1] = 0xF1;
834 rcd_buffer[2] = 0x4B;
835 rcd_buffer[3] = 0xF0;
837 dasd_wakeup_cb(cqr, data);
840 static int dasd_eckd_read_conf_immediately(struct dasd_device *device,
841 struct dasd_ccw_req *cqr,
848 * sanity check: scan for RCD command in extended SenseID data
849 * some devices do not support RCD
851 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD);
852 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD)
855 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm);
856 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
857 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags);
859 cqr->callback = read_conf_cb;
860 rc = dasd_sleep_on_immediatly(cqr);
864 static int dasd_eckd_read_conf_lpm(struct dasd_device *device,
866 int *rcd_buffer_size, __u8 lpm)
869 char *rcd_buf = NULL;
871 struct dasd_ccw_req *cqr;
874 * sanity check: scan for RCD command in extended SenseID data
875 * some devices do not support RCD
877 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD);
878 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) {
882 rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA);
887 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */,
888 0, /* use rcd_buf as data ara */
891 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
892 "Could not allocate RCD request");
896 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm);
897 cqr->callback = read_conf_cb;
898 ret = dasd_sleep_on(cqr);
900 * on success we update the user input parms
902 dasd_sfree_request(cqr, cqr->memdev);
906 *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE;
907 *rcd_buffer = rcd_buf;
912 *rcd_buffer_size = 0;
916 static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private)
919 struct dasd_sneq *sneq;
923 private->sneq = NULL;
924 private->vdsneq = NULL;
925 private->gneq = NULL;
926 count = private->conf_len / sizeof(struct dasd_sneq);
927 sneq = (struct dasd_sneq *)private->conf_data;
928 for (i = 0; i < count; ++i) {
929 if (sneq->flags.identifier == 1 && sneq->format == 1)
930 private->sneq = sneq;
931 else if (sneq->flags.identifier == 1 && sneq->format == 4)
932 private->vdsneq = (struct vd_sneq *)sneq;
933 else if (sneq->flags.identifier == 2)
934 private->gneq = (struct dasd_gneq *)sneq;
935 else if (sneq->flags.identifier == 3 && sneq->res1 == 1)
936 private->ned = (struct dasd_ned *)sneq;
939 if (!private->ned || !private->gneq) {
941 private->sneq = NULL;
942 private->vdsneq = NULL;
943 private->gneq = NULL;
950 static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len)
952 struct dasd_gneq *gneq;
955 count = conf_len / sizeof(*gneq);
956 gneq = (struct dasd_gneq *)conf_data;
958 for (i = 0; i < count; ++i) {
959 if (gneq->flags.identifier == 2) {
966 return ((char *)gneq)[18] & 0x07;
971 static void dasd_eckd_clear_conf_data(struct dasd_device *device)
973 struct dasd_eckd_private *private = device->private;
976 private->conf_data = NULL;
977 private->conf_len = 0;
978 for (i = 0; i < 8; i++) {
979 kfree(device->path[i].conf_data);
980 device->path[i].conf_data = NULL;
981 device->path[i].cssid = 0;
982 device->path[i].ssid = 0;
983 device->path[i].chpid = 0;
988 static int dasd_eckd_read_conf(struct dasd_device *device)
991 int conf_len, conf_data_saved;
992 int rc, path_err, pos;
994 struct dasd_eckd_private *private, path_private;
995 struct dasd_uid *uid;
996 char print_path_uid[60], print_device_uid[60];
997 struct channel_path_desc_fmt0 *chp_desc;
998 struct subchannel_id sch_id;
1000 private = device->private;
1001 opm = ccw_device_get_path_mask(device->cdev);
1002 ccw_device_get_schid(device->cdev, &sch_id);
1003 conf_data_saved = 0;
1005 /* get configuration data per operational path */
1006 for (lpm = 0x80; lpm; lpm>>= 1) {
1009 rc = dasd_eckd_read_conf_lpm(device, &conf_data,
1011 if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */
1012 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1013 "Read configuration data returned "
1017 if (conf_data == NULL) {
1018 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1019 "No configuration data "
1021 /* no further analysis possible */
1022 dasd_path_add_opm(device, opm);
1023 continue; /* no error */
1025 /* save first valid configuration data */
1026 if (!conf_data_saved) {
1027 /* initially clear previously stored conf_data */
1028 dasd_eckd_clear_conf_data(device);
1029 private->conf_data = conf_data;
1030 private->conf_len = conf_len;
1031 if (dasd_eckd_identify_conf_parts(private)) {
1032 private->conf_data = NULL;
1033 private->conf_len = 0;
1037 pos = pathmask_to_pos(lpm);
1038 /* store per path conf_data */
1039 device->path[pos].conf_data = conf_data;
1040 device->path[pos].cssid = sch_id.cssid;
1041 device->path[pos].ssid = sch_id.ssid;
1042 chp_desc = ccw_device_get_chp_desc(device->cdev, pos);
1044 device->path[pos].chpid = chp_desc->chpid;
1047 * build device UID that other path data
1048 * can be compared to it
1050 dasd_eckd_generate_uid(device);
1053 path_private.conf_data = conf_data;
1054 path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE;
1055 if (dasd_eckd_identify_conf_parts(
1057 path_private.conf_data = NULL;
1058 path_private.conf_len = 0;
1062 if (dasd_eckd_compare_path_uid(
1063 device, &path_private)) {
1064 uid = &path_private.uid;
1065 if (strlen(uid->vduit) > 0)
1066 snprintf(print_path_uid,
1067 sizeof(print_path_uid),
1068 "%s.%s.%04x.%02x.%s",
1069 uid->vendor, uid->serial,
1070 uid->ssid, uid->real_unit_addr,
1073 snprintf(print_path_uid,
1074 sizeof(print_path_uid),
1076 uid->vendor, uid->serial,
1078 uid->real_unit_addr);
1079 uid = &private->uid;
1080 if (strlen(uid->vduit) > 0)
1081 snprintf(print_device_uid,
1082 sizeof(print_device_uid),
1083 "%s.%s.%04x.%02x.%s",
1084 uid->vendor, uid->serial,
1085 uid->ssid, uid->real_unit_addr,
1088 snprintf(print_device_uid,
1089 sizeof(print_device_uid),
1091 uid->vendor, uid->serial,
1093 uid->real_unit_addr);
1094 dev_err(&device->cdev->dev,
1095 "Not all channel paths lead to "
1096 "the same device, path %02X leads to "
1097 "device %s instead of %s\n", lpm,
1098 print_path_uid, print_device_uid);
1100 dasd_path_add_cablepm(device, lpm);
1103 pos = pathmask_to_pos(lpm);
1104 /* store per path conf_data */
1105 device->path[pos].conf_data = conf_data;
1106 device->path[pos].cssid = sch_id.cssid;
1107 device->path[pos].ssid = sch_id.ssid;
1108 chp_desc = ccw_device_get_chp_desc(device->cdev, pos);
1110 device->path[pos].chpid = chp_desc->chpid;
1112 path_private.conf_data = NULL;
1113 path_private.conf_len = 0;
1115 switch (dasd_eckd_path_access(conf_data, conf_len)) {
1117 dasd_path_add_nppm(device, lpm);
1120 dasd_path_add_ppm(device, lpm);
1123 if (!dasd_path_get_opm(device)) {
1124 dasd_path_set_opm(device, lpm);
1125 dasd_generic_path_operational(device);
1127 dasd_path_add_opm(device, lpm);
1134 static u32 get_fcx_max_data(struct dasd_device *device)
1136 struct dasd_eckd_private *private = device->private;
1137 int fcx_in_css, fcx_in_gneq, fcx_in_features;
1142 /* is transport mode supported? */
1143 fcx_in_css = css_general_characteristics.fcx;
1144 fcx_in_gneq = private->gneq->reserved2[7] & 0x04;
1145 fcx_in_features = private->features.feature[40] & 0x80;
1146 tpm = fcx_in_css && fcx_in_gneq && fcx_in_features;
1151 mdc = ccw_device_get_mdc(device->cdev, 0);
1153 dev_warn(&device->cdev->dev, "Detecting the maximum supported data size for zHPF requests failed\n");
1156 return (u32)mdc * FCX_MAX_DATA_FACTOR;
1160 static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm)
1162 struct dasd_eckd_private *private = device->private;
1166 if (private->fcx_max_data) {
1167 mdc = ccw_device_get_mdc(device->cdev, lpm);
1169 dev_warn(&device->cdev->dev,
1170 "Detecting the maximum data size for zHPF "
1171 "requests failed (rc=%d) for a new path %x\n",
1175 fcx_max_data = (u32)mdc * FCX_MAX_DATA_FACTOR;
1176 if (fcx_max_data < private->fcx_max_data) {
1177 dev_warn(&device->cdev->dev,
1178 "The maximum data size for zHPF requests %u "
1179 "on a new path %x is below the active maximum "
1180 "%u\n", fcx_max_data, lpm,
1181 private->fcx_max_data);
1188 static int rebuild_device_uid(struct dasd_device *device,
1189 struct path_verification_work_data *data)
1191 struct dasd_eckd_private *private = device->private;
1192 __u8 lpm, opm = dasd_path_get_opm(device);
1195 for (lpm = 0x80; lpm; lpm >>= 1) {
1198 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer));
1199 memset(&data->cqr, 0, sizeof(data->cqr));
1200 data->cqr.cpaddr = &data->ccw;
1201 rc = dasd_eckd_read_conf_immediately(device, &data->cqr,
1206 if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */
1208 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1209 "Read configuration data "
1210 "returned error %d", rc);
1213 memcpy(private->conf_data, data->rcd_buffer,
1214 DASD_ECKD_RCD_DATA_SIZE);
1215 if (dasd_eckd_identify_conf_parts(private)) {
1217 } else /* first valid path is enough */
1222 rc = dasd_eckd_generate_uid(device);
1227 static void do_path_verification_work(struct work_struct *work)
1229 struct path_verification_work_data *data;
1230 struct dasd_device *device;
1231 struct dasd_eckd_private path_private;
1232 struct dasd_uid *uid;
1233 __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE];
1234 __u8 lpm, opm, npm, ppm, epm, hpfpm, cablepm;
1235 unsigned long flags;
1239 data = container_of(work, struct path_verification_work_data, worker);
1240 device = data->device;
1242 /* delay path verification until device was resumed */
1243 if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) {
1244 schedule_work(work);
1247 /* check if path verification already running and delay if so */
1248 if (test_and_set_bit(DASD_FLAG_PATH_VERIFY, &device->flags)) {
1249 schedule_work(work);
1259 for (lpm = 0x80; lpm; lpm >>= 1) {
1260 if (!(lpm & data->tbvpm))
1262 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer));
1263 memset(&data->cqr, 0, sizeof(data->cqr));
1264 data->cqr.cpaddr = &data->ccw;
1265 rc = dasd_eckd_read_conf_immediately(device, &data->cqr,
1269 switch (dasd_eckd_path_access(data->rcd_buffer,
1270 DASD_ECKD_RCD_DATA_SIZE)
1280 } else if (rc == -EOPNOTSUPP) {
1281 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1282 "path verification: No configuration "
1285 } else if (rc == -EAGAIN) {
1286 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1287 "path verification: device is stopped,"
1288 " try again later");
1291 dev_warn(&device->cdev->dev,
1292 "Reading device feature codes failed "
1293 "(rc=%d) for new path %x\n", rc, lpm);
1296 if (verify_fcx_max_data(device, lpm)) {
1305 * save conf_data for comparison after
1306 * rebuild_device_uid may have changed
1309 memcpy(&path_rcd_buf, data->rcd_buffer,
1310 DASD_ECKD_RCD_DATA_SIZE);
1311 path_private.conf_data = (void *) &path_rcd_buf;
1312 path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE;
1313 if (dasd_eckd_identify_conf_parts(&path_private)) {
1314 path_private.conf_data = NULL;
1315 path_private.conf_len = 0;
1320 * compare path UID with device UID only if at least
1321 * one valid path is left
1322 * in other case the device UID may have changed and
1323 * the first working path UID will be used as device UID
1325 if (dasd_path_get_opm(device) &&
1326 dasd_eckd_compare_path_uid(device, &path_private)) {
1328 * the comparison was not successful
1329 * rebuild the device UID with at least one
1330 * known path in case a z/VM hyperswap command
1331 * has changed the device
1333 * after this compare again
1335 * if either the rebuild or the recompare fails
1336 * the path can not be used
1338 if (rebuild_device_uid(device, data) ||
1339 dasd_eckd_compare_path_uid(
1340 device, &path_private)) {
1341 uid = &path_private.uid;
1342 if (strlen(uid->vduit) > 0)
1343 snprintf(print_uid, sizeof(print_uid),
1344 "%s.%s.%04x.%02x.%s",
1345 uid->vendor, uid->serial,
1346 uid->ssid, uid->real_unit_addr,
1349 snprintf(print_uid, sizeof(print_uid),
1351 uid->vendor, uid->serial,
1353 uid->real_unit_addr);
1354 dev_err(&device->cdev->dev,
1355 "The newly added channel path %02X "
1356 "will not be used because it leads "
1357 "to a different device %s\n",
1368 * There is a small chance that a path is lost again between
1369 * above path verification and the following modification of
1370 * the device opm mask. We could avoid that race here by using
1371 * yet another path mask, but we rather deal with this unlikely
1372 * situation in dasd_start_IO.
1374 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
1375 if (!dasd_path_get_opm(device) && opm) {
1376 dasd_path_set_opm(device, opm);
1377 dasd_generic_path_operational(device);
1379 dasd_path_add_opm(device, opm);
1381 dasd_path_add_nppm(device, npm);
1382 dasd_path_add_ppm(device, ppm);
1383 dasd_path_add_tbvpm(device, epm);
1384 dasd_path_add_cablepm(device, cablepm);
1385 dasd_path_add_nohpfpm(device, hpfpm);
1386 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
1388 clear_bit(DASD_FLAG_PATH_VERIFY, &device->flags);
1389 dasd_put_device(device);
1391 mutex_unlock(&dasd_path_verification_mutex);
1396 static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm)
1398 struct path_verification_work_data *data;
1400 data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA);
1402 if (mutex_trylock(&dasd_path_verification_mutex)) {
1403 data = path_verification_worker;
1408 memset(data, 0, sizeof(*data));
1411 INIT_WORK(&data->worker, do_path_verification_work);
1412 dasd_get_device(device);
1413 data->device = device;
1415 schedule_work(&data->worker);
1419 static void dasd_eckd_reset_path(struct dasd_device *device, __u8 pm)
1421 struct dasd_eckd_private *private = device->private;
1422 unsigned long flags;
1424 if (!private->fcx_max_data)
1425 private->fcx_max_data = get_fcx_max_data(device);
1426 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
1427 dasd_path_set_tbvpm(device, pm ? : dasd_path_get_notoperpm(device));
1428 dasd_schedule_device_bh(device);
1429 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
1432 static int dasd_eckd_read_features(struct dasd_device *device)
1434 struct dasd_eckd_private *private = device->private;
1435 struct dasd_psf_prssd_data *prssdp;
1436 struct dasd_rssd_features *features;
1437 struct dasd_ccw_req *cqr;
1441 memset(&private->features, 0, sizeof(struct dasd_rssd_features));
1442 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
1443 (sizeof(struct dasd_psf_prssd_data) +
1444 sizeof(struct dasd_rssd_features)),
1447 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not "
1448 "allocate initialization request");
1449 return PTR_ERR(cqr);
1451 cqr->startdev = device;
1452 cqr->memdev = device;
1455 cqr->expires = 10 * HZ;
1457 /* Prepare for Read Subsystem Data */
1458 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
1459 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
1460 prssdp->order = PSF_ORDER_PRSSD;
1461 prssdp->suborder = 0x41; /* Read Feature Codes */
1462 /* all other bytes of prssdp must be zero */
1465 ccw->cmd_code = DASD_ECKD_CCW_PSF;
1466 ccw->count = sizeof(struct dasd_psf_prssd_data);
1467 ccw->flags |= CCW_FLAG_CC;
1468 ccw->cda = (__u32)(addr_t) prssdp;
1470 /* Read Subsystem Data - feature codes */
1471 features = (struct dasd_rssd_features *) (prssdp + 1);
1472 memset(features, 0, sizeof(struct dasd_rssd_features));
1475 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
1476 ccw->count = sizeof(struct dasd_rssd_features);
1477 ccw->cda = (__u32)(addr_t) features;
1479 cqr->buildclk = get_tod_clock();
1480 cqr->status = DASD_CQR_FILLED;
1481 rc = dasd_sleep_on(cqr);
1483 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
1484 features = (struct dasd_rssd_features *) (prssdp + 1);
1485 memcpy(&private->features, features,
1486 sizeof(struct dasd_rssd_features));
1488 dev_warn(&device->cdev->dev, "Reading device feature codes"
1489 " failed with rc=%d\n", rc);
1490 dasd_sfree_request(cqr, cqr->memdev);
1496 * Build CP for Perform Subsystem Function - SSC.
1498 static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device,
1501 struct dasd_ccw_req *cqr;
1502 struct dasd_psf_ssc_data *psf_ssc_data;
1505 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ ,
1506 sizeof(struct dasd_psf_ssc_data),
1510 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1511 "Could not allocate PSF-SSC request");
1514 psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data;
1515 psf_ssc_data->order = PSF_ORDER_SSC;
1516 psf_ssc_data->suborder = 0xc0;
1518 psf_ssc_data->suborder |= 0x08;
1519 psf_ssc_data->reserved[0] = 0x88;
1522 ccw->cmd_code = DASD_ECKD_CCW_PSF;
1523 ccw->cda = (__u32)(addr_t)psf_ssc_data;
1526 cqr->startdev = device;
1527 cqr->memdev = device;
1530 cqr->expires = 10*HZ;
1531 cqr->buildclk = get_tod_clock();
1532 cqr->status = DASD_CQR_FILLED;
1537 * Perform Subsystem Function.
1538 * It is necessary to trigger CIO for channel revalidation since this
1539 * call might change behaviour of DASD devices.
1542 dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav,
1543 unsigned long flags)
1545 struct dasd_ccw_req *cqr;
1548 cqr = dasd_eckd_build_psf_ssc(device, enable_pav);
1550 return PTR_ERR(cqr);
1553 * set flags e.g. turn on failfast, to prevent blocking
1554 * the calling function should handle failed requests
1556 cqr->flags |= flags;
1558 rc = dasd_sleep_on(cqr);
1560 /* trigger CIO to reprobe devices */
1561 css_schedule_reprobe();
1562 else if (cqr->intrc == -EAGAIN)
1565 dasd_sfree_request(cqr, cqr->memdev);
1570 * Valide storage server of current device.
1572 static int dasd_eckd_validate_server(struct dasd_device *device,
1573 unsigned long flags)
1575 struct dasd_eckd_private *private = device->private;
1578 if (private->uid.type == UA_BASE_PAV_ALIAS ||
1579 private->uid.type == UA_HYPER_PAV_ALIAS)
1581 if (dasd_nopav || MACHINE_IS_VM)
1585 rc = dasd_eckd_psf_ssc(device, enable_pav, flags);
1587 /* may be requested feature is not available on server,
1588 * therefore just report error and go ahead */
1589 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x "
1590 "returned rc=%d", private->uid.ssid, rc);
1595 * worker to do a validate server in case of a lost pathgroup
1597 static void dasd_eckd_do_validate_server(struct work_struct *work)
1599 struct dasd_device *device = container_of(work, struct dasd_device,
1601 unsigned long flags = 0;
1603 set_bit(DASD_CQR_FLAGS_FAILFAST, &flags);
1604 if (dasd_eckd_validate_server(device, flags)
1606 /* schedule worker again if failed */
1607 schedule_work(&device->kick_validate);
1611 dasd_put_device(device);
1614 static void dasd_eckd_kick_validate_server(struct dasd_device *device)
1616 dasd_get_device(device);
1617 /* exit if device not online or in offline processing */
1618 if (test_bit(DASD_FLAG_OFFLINE, &device->flags) ||
1619 device->state < DASD_STATE_ONLINE) {
1620 dasd_put_device(device);
1623 /* queue call to do_validate_server to the kernel event daemon. */
1624 if (!schedule_work(&device->kick_validate))
1625 dasd_put_device(device);
1629 * Check device characteristics.
1630 * If the device is accessible using ECKD discipline, the device is enabled.
1633 dasd_eckd_check_characteristics(struct dasd_device *device)
1635 struct dasd_eckd_private *private = device->private;
1636 struct dasd_block *block;
1637 struct dasd_uid temp_uid;
1640 unsigned long value;
1642 /* setup work queue for validate server*/
1643 INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server);
1644 /* setup work queue for summary unit check */
1645 INIT_WORK(&device->suc_work, dasd_alias_handle_summary_unit_check);
1647 if (!ccw_device_is_pathgroup(device->cdev)) {
1648 dev_warn(&device->cdev->dev,
1649 "A channel path group could not be established\n");
1652 if (!ccw_device_is_multipath(device->cdev)) {
1653 dev_info(&device->cdev->dev,
1654 "The DASD is not operating in multipath mode\n");
1657 private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA);
1659 dev_warn(&device->cdev->dev,
1660 "Allocating memory for private DASD data "
1664 device->private = private;
1666 memset(private, 0, sizeof(*private));
1668 /* Invalidate status of initial analysis. */
1669 private->init_cqr_status = -1;
1670 /* Set default cache operations. */
1671 private->attrib.operation = DASD_NORMAL_CACHE;
1672 private->attrib.nr_cyl = 0;
1674 /* Read Configuration Data */
1675 rc = dasd_eckd_read_conf(device);
1679 /* set some default values */
1680 device->default_expires = DASD_EXPIRES;
1681 device->default_retries = DASD_RETRIES;
1682 device->path_thrhld = DASD_ECKD_PATH_THRHLD;
1683 device->path_interval = DASD_ECKD_PATH_INTERVAL;
1685 if (private->gneq) {
1687 for (i = 0; i < private->gneq->timeout.value; i++)
1689 value = value * private->gneq->timeout.number;
1690 /* do not accept useless values */
1691 if (value != 0 && value <= DASD_EXPIRES_MAX)
1692 device->default_expires = value;
1695 dasd_eckd_get_uid(device, &temp_uid);
1696 if (temp_uid.type == UA_BASE_DEVICE) {
1697 block = dasd_alloc_block();
1698 if (IS_ERR(block)) {
1699 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1700 "could not allocate dasd "
1702 rc = PTR_ERR(block);
1705 device->block = block;
1706 block->base = device;
1709 /* register lcu with alias handling, enable PAV */
1710 rc = dasd_alias_make_device_known_to_lcu(device);
1714 dasd_eckd_validate_server(device, 0);
1716 /* device may report different configuration data after LCU setup */
1717 rc = dasd_eckd_read_conf(device);
1721 /* Read Feature Codes */
1722 dasd_eckd_read_features(device);
1724 /* Read Device Characteristics */
1725 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
1726 &private->rdc_data, 64);
1728 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1729 "Read device characteristic failed, rc=%d", rc);
1733 if ((device->features & DASD_FEATURE_USERAW) &&
1734 !(private->rdc_data.facilities.RT_in_LR)) {
1735 dev_err(&device->cdev->dev, "The storage server does not "
1736 "support raw-track access\n");
1741 /* find the valid cylinder size */
1742 if (private->rdc_data.no_cyl == LV_COMPAT_CYL &&
1743 private->rdc_data.long_no_cyl)
1744 private->real_cyl = private->rdc_data.long_no_cyl;
1746 private->real_cyl = private->rdc_data.no_cyl;
1748 private->fcx_max_data = get_fcx_max_data(device);
1750 readonly = dasd_device_is_ro(device);
1752 set_bit(DASD_FLAG_DEVICE_RO, &device->flags);
1754 dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) "
1755 "with %d cylinders, %d heads, %d sectors%s\n",
1756 private->rdc_data.dev_type,
1757 private->rdc_data.dev_model,
1758 private->rdc_data.cu_type,
1759 private->rdc_data.cu_model.model,
1761 private->rdc_data.trk_per_cyl,
1762 private->rdc_data.sec_per_trk,
1763 readonly ? ", read-only device" : "");
1767 dasd_alias_disconnect_device_from_lcu(device);
1769 dasd_free_block(device->block);
1770 device->block = NULL;
1772 kfree(private->conf_data);
1773 kfree(device->private);
1774 device->private = NULL;
1778 static void dasd_eckd_uncheck_device(struct dasd_device *device)
1780 struct dasd_eckd_private *private = device->private;
1786 dasd_alias_disconnect_device_from_lcu(device);
1787 private->ned = NULL;
1788 private->sneq = NULL;
1789 private->vdsneq = NULL;
1790 private->gneq = NULL;
1791 private->conf_len = 0;
1792 for (i = 0; i < 8; i++) {
1793 kfree(device->path[i].conf_data);
1794 if ((__u8 *)device->path[i].conf_data ==
1795 private->conf_data) {
1796 private->conf_data = NULL;
1797 private->conf_len = 0;
1799 device->path[i].conf_data = NULL;
1800 device->path[i].cssid = 0;
1801 device->path[i].ssid = 0;
1802 device->path[i].chpid = 0;
1804 kfree(private->conf_data);
1805 private->conf_data = NULL;
1808 static struct dasd_ccw_req *
1809 dasd_eckd_analysis_ccw(struct dasd_device *device)
1811 struct dasd_eckd_private *private = device->private;
1812 struct eckd_count *count_data;
1813 struct LO_eckd_data *LO_data;
1814 struct dasd_ccw_req *cqr;
1816 int cplength, datasize;
1820 datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data);
1821 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device,
1826 /* Define extent for the first 3 tracks. */
1827 define_extent(ccw++, cqr->data, 0, 2,
1828 DASD_ECKD_CCW_READ_COUNT, device, 0);
1829 LO_data = cqr->data + sizeof(struct DE_eckd_data);
1830 /* Locate record for the first 4 records on track 0. */
1831 ccw[-1].flags |= CCW_FLAG_CC;
1832 locate_record(ccw++, LO_data++, 0, 0, 4,
1833 DASD_ECKD_CCW_READ_COUNT, device, 0);
1835 count_data = private->count_area;
1836 for (i = 0; i < 4; i++) {
1837 ccw[-1].flags |= CCW_FLAG_CC;
1838 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
1841 ccw->cda = (__u32)(addr_t) count_data;
1846 /* Locate record for the first record on track 2. */
1847 ccw[-1].flags |= CCW_FLAG_CC;
1848 locate_record(ccw++, LO_data++, 2, 0, 1,
1849 DASD_ECKD_CCW_READ_COUNT, device, 0);
1850 /* Read count ccw. */
1851 ccw[-1].flags |= CCW_FLAG_CC;
1852 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
1855 ccw->cda = (__u32)(addr_t) count_data;
1858 cqr->startdev = device;
1859 cqr->memdev = device;
1861 cqr->buildclk = get_tod_clock();
1862 cqr->status = DASD_CQR_FILLED;
1866 /* differentiate between 'no record found' and any other error */
1867 static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr)
1870 if (init_cqr->status == DASD_CQR_DONE)
1872 else if (init_cqr->status == DASD_CQR_NEED_ERP ||
1873 init_cqr->status == DASD_CQR_FAILED) {
1874 sense = dasd_get_sense(&init_cqr->irb);
1875 if (sense && (sense[1] & SNS1_NO_REC_FOUND))
1876 return INIT_CQR_UNFORMATTED;
1878 return INIT_CQR_ERROR;
1880 return INIT_CQR_ERROR;
1884 * This is the callback function for the init_analysis cqr. It saves
1885 * the status of the initial analysis ccw before it frees it and kicks
1886 * the device to continue the startup sequence. This will call
1887 * dasd_eckd_do_analysis again (if the devices has not been marked
1888 * for deletion in the meantime).
1890 static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr,
1893 struct dasd_device *device = init_cqr->startdev;
1894 struct dasd_eckd_private *private = device->private;
1896 private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr);
1897 dasd_sfree_request(init_cqr, device);
1898 dasd_kick_device(device);
1901 static int dasd_eckd_start_analysis(struct dasd_block *block)
1903 struct dasd_ccw_req *init_cqr;
1905 init_cqr = dasd_eckd_analysis_ccw(block->base);
1906 if (IS_ERR(init_cqr))
1907 return PTR_ERR(init_cqr);
1908 init_cqr->callback = dasd_eckd_analysis_callback;
1909 init_cqr->callback_data = NULL;
1910 init_cqr->expires = 5*HZ;
1911 /* first try without ERP, so we can later handle unformatted
1912 * devices as special case
1914 clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags);
1915 init_cqr->retries = 0;
1916 dasd_add_request_head(init_cqr);
1920 static int dasd_eckd_end_analysis(struct dasd_block *block)
1922 struct dasd_device *device = block->base;
1923 struct dasd_eckd_private *private = device->private;
1924 struct eckd_count *count_area;
1925 unsigned int sb, blk_per_trk;
1927 struct dasd_ccw_req *init_cqr;
1929 status = private->init_cqr_status;
1930 private->init_cqr_status = -1;
1931 if (status == INIT_CQR_ERROR) {
1932 /* try again, this time with full ERP */
1933 init_cqr = dasd_eckd_analysis_ccw(device);
1934 dasd_sleep_on(init_cqr);
1935 status = dasd_eckd_analysis_evaluation(init_cqr);
1936 dasd_sfree_request(init_cqr, device);
1939 if (device->features & DASD_FEATURE_USERAW) {
1940 block->bp_block = DASD_RAW_BLOCKSIZE;
1941 blk_per_trk = DASD_RAW_BLOCK_PER_TRACK;
1942 block->s2b_shift = 3;
1946 if (status == INIT_CQR_UNFORMATTED) {
1947 dev_warn(&device->cdev->dev, "The DASD is not formatted\n");
1948 return -EMEDIUMTYPE;
1949 } else if (status == INIT_CQR_ERROR) {
1950 dev_err(&device->cdev->dev,
1951 "Detecting the DASD disk layout failed because "
1952 "of an I/O error\n");
1956 private->uses_cdl = 1;
1957 /* Check Track 0 for Compatible Disk Layout */
1959 for (i = 0; i < 3; i++) {
1960 if (private->count_area[i].kl != 4 ||
1961 private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 ||
1962 private->count_area[i].cyl != 0 ||
1963 private->count_area[i].head != count_area_head[i] ||
1964 private->count_area[i].record != count_area_rec[i]) {
1965 private->uses_cdl = 0;
1970 count_area = &private->count_area[4];
1972 if (private->uses_cdl == 0) {
1973 for (i = 0; i < 5; i++) {
1974 if ((private->count_area[i].kl != 0) ||
1975 (private->count_area[i].dl !=
1976 private->count_area[0].dl) ||
1977 private->count_area[i].cyl != 0 ||
1978 private->count_area[i].head != count_area_head[i] ||
1979 private->count_area[i].record != count_area_rec[i])
1983 count_area = &private->count_area[0];
1985 if (private->count_area[3].record == 1)
1986 dev_warn(&device->cdev->dev,
1987 "Track 0 has no records following the VTOC\n");
1990 if (count_area != NULL && count_area->kl == 0) {
1991 /* we found notthing violating our disk layout */
1992 if (dasd_check_blocksize(count_area->dl) == 0)
1993 block->bp_block = count_area->dl;
1995 if (block->bp_block == 0) {
1996 dev_warn(&device->cdev->dev,
1997 "The disk layout of the DASD is not supported\n");
1998 return -EMEDIUMTYPE;
2000 block->s2b_shift = 0; /* bits to shift 512 to get a block */
2001 for (sb = 512; sb < block->bp_block; sb = sb << 1)
2004 blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block);
2007 block->blocks = (private->real_cyl *
2008 private->rdc_data.trk_per_cyl *
2011 dev_info(&device->cdev->dev,
2012 "DASD with %d KB/block, %d KB total size, %d KB/track, "
2013 "%s\n", (block->bp_block >> 10),
2014 ((private->real_cyl *
2015 private->rdc_data.trk_per_cyl *
2016 blk_per_trk * (block->bp_block >> 9)) >> 1),
2017 ((blk_per_trk * block->bp_block) >> 10),
2019 "compatible disk layout" : "linux disk layout");
2024 static int dasd_eckd_do_analysis(struct dasd_block *block)
2026 struct dasd_eckd_private *private = block->base->private;
2028 if (private->init_cqr_status < 0)
2029 return dasd_eckd_start_analysis(block);
2031 return dasd_eckd_end_analysis(block);
2034 static int dasd_eckd_basic_to_ready(struct dasd_device *device)
2036 return dasd_alias_add_device(device);
2039 static int dasd_eckd_online_to_ready(struct dasd_device *device)
2041 if (cancel_work_sync(&device->reload_device))
2042 dasd_put_device(device);
2043 if (cancel_work_sync(&device->kick_validate))
2044 dasd_put_device(device);
2049 static int dasd_eckd_basic_to_known(struct dasd_device *device)
2051 return dasd_alias_remove_device(device);
2055 dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo)
2057 struct dasd_eckd_private *private = block->base->private;
2059 if (dasd_check_blocksize(block->bp_block) == 0) {
2060 geo->sectors = recs_per_track(&private->rdc_data,
2061 0, block->bp_block);
2063 geo->cylinders = private->rdc_data.no_cyl;
2064 geo->heads = private->rdc_data.trk_per_cyl;
2069 * Build the TCW request for the format check
2071 static struct dasd_ccw_req *
2072 dasd_eckd_build_check_tcw(struct dasd_device *base, struct format_data_t *fdata,
2073 int enable_pav, struct eckd_count *fmt_buffer,
2076 struct dasd_eckd_private *start_priv;
2077 struct dasd_device *startdev = NULL;
2078 struct tidaw *last_tidaw = NULL;
2079 struct dasd_ccw_req *cqr;
2087 startdev = dasd_alias_get_start_dev(base);
2092 start_priv = startdev->private;
2094 count = rpt * (fdata->stop_unit - fdata->start_unit + 1);
2097 * we're adding 'count' amount of tidaw to the itcw.
2098 * calculate the corresponding itcw_size
2100 itcw_size = itcw_calc_size(0, count, 0);
2102 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev,
2107 start_priv->count++;
2109 itcw = itcw_init(cqr->data, itcw_size, ITCW_OP_READ, 0, count, 0);
2115 cqr->cpaddr = itcw_get_tcw(itcw);
2116 rc = prepare_itcw(itcw, fdata->start_unit, fdata->stop_unit,
2117 DASD_ECKD_CCW_READ_COUNT_MT, base, startdev, 0, count,
2118 sizeof(struct eckd_count),
2119 count * sizeof(struct eckd_count), 0, rpt);
2123 for (i = 0; i < count; i++) {
2124 last_tidaw = itcw_add_tidaw(itcw, 0, fmt_buffer++,
2125 sizeof(struct eckd_count));
2126 if (IS_ERR(last_tidaw)) {
2132 last_tidaw->flags |= TIDAW_FLAGS_LAST;
2133 itcw_finalize(itcw);
2136 cqr->startdev = startdev;
2137 cqr->memdev = startdev;
2138 cqr->basedev = base;
2139 cqr->retries = startdev->default_retries;
2140 cqr->expires = startdev->default_expires * HZ;
2141 cqr->buildclk = get_tod_clock();
2142 cqr->status = DASD_CQR_FILLED;
2143 /* Set flags to suppress output for expected errors */
2144 set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags);
2145 set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags);
2150 dasd_sfree_request(cqr, startdev);
2156 * Build the CCW request for the format check
2158 static struct dasd_ccw_req *
2159 dasd_eckd_build_check(struct dasd_device *base, struct format_data_t *fdata,
2160 int enable_pav, struct eckd_count *fmt_buffer, int rpt)
2162 struct dasd_eckd_private *start_priv;
2163 struct dasd_eckd_private *base_priv;
2164 struct dasd_device *startdev = NULL;
2165 struct dasd_ccw_req *cqr;
2168 int cplength, datasize;
2174 startdev = dasd_alias_get_start_dev(base);
2179 start_priv = startdev->private;
2180 base_priv = base->private;
2182 count = rpt * (fdata->stop_unit - fdata->start_unit + 1);
2184 use_prefix = base_priv->features.feature[8] & 0x01;
2188 datasize = sizeof(struct PFX_eckd_data);
2191 datasize = sizeof(struct DE_eckd_data) +
2192 sizeof(struct LO_eckd_data);
2196 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
2201 start_priv->count++;
2206 prefix_LRE(ccw++, data, fdata->start_unit, fdata->stop_unit,
2207 DASD_ECKD_CCW_READ_COUNT, base, startdev, 1, 0,
2210 define_extent(ccw++, data, fdata->start_unit, fdata->stop_unit,
2211 DASD_ECKD_CCW_READ_COUNT, startdev, 0);
2213 data += sizeof(struct DE_eckd_data);
2214 ccw[-1].flags |= CCW_FLAG_CC;
2216 locate_record(ccw++, data, fdata->start_unit, 0, count,
2217 DASD_ECKD_CCW_READ_COUNT, base, 0);
2220 for (i = 0; i < count; i++) {
2221 ccw[-1].flags |= CCW_FLAG_CC;
2222 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
2223 ccw->flags = CCW_FLAG_SLI;
2225 ccw->cda = (__u32)(addr_t) fmt_buffer;
2230 cqr->startdev = startdev;
2231 cqr->memdev = startdev;
2232 cqr->basedev = base;
2233 cqr->retries = DASD_RETRIES;
2234 cqr->expires = startdev->default_expires * HZ;
2235 cqr->buildclk = get_tod_clock();
2236 cqr->status = DASD_CQR_FILLED;
2237 /* Set flags to suppress output for expected errors */
2238 set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags);
2243 static struct dasd_ccw_req *
2244 dasd_eckd_build_format(struct dasd_device *base,
2245 struct format_data_t *fdata,
2248 struct dasd_eckd_private *base_priv;
2249 struct dasd_eckd_private *start_priv;
2250 struct dasd_device *startdev = NULL;
2251 struct dasd_ccw_req *fcp;
2252 struct eckd_count *ect;
2253 struct ch_t address;
2257 int cplength, datasize;
2265 startdev = dasd_alias_get_start_dev(base);
2270 start_priv = startdev->private;
2271 base_priv = base->private;
2273 rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize);
2275 nr_tracks = fdata->stop_unit - fdata->start_unit + 1;
2278 * fdata->intensity is a bit string that tells us what to do:
2279 * Bit 0: write record zero
2280 * Bit 1: write home address, currently not supported
2281 * Bit 2: invalidate tracks
2282 * Bit 3: use OS/390 compatible disk layout (cdl)
2283 * Bit 4: do not allow storage subsystem to modify record zero
2284 * Only some bit combinations do make sense.
2286 if (fdata->intensity & 0x10) {
2288 intensity = fdata->intensity & ~0x10;
2291 intensity = fdata->intensity;
2294 use_prefix = base_priv->features.feature[8] & 0x01;
2296 switch (intensity) {
2297 case 0x00: /* Normal format */
2298 case 0x08: /* Normal format, use cdl. */
2299 cplength = 2 + (rpt*nr_tracks);
2301 datasize = sizeof(struct PFX_eckd_data) +
2302 sizeof(struct LO_eckd_data) +
2303 rpt * nr_tracks * sizeof(struct eckd_count);
2305 datasize = sizeof(struct DE_eckd_data) +
2306 sizeof(struct LO_eckd_data) +
2307 rpt * nr_tracks * sizeof(struct eckd_count);
2309 case 0x01: /* Write record zero and format track. */
2310 case 0x09: /* Write record zero and format track, use cdl. */
2311 cplength = 2 + rpt * nr_tracks;
2313 datasize = sizeof(struct PFX_eckd_data) +
2314 sizeof(struct LO_eckd_data) +
2315 sizeof(struct eckd_count) +
2316 rpt * nr_tracks * sizeof(struct eckd_count);
2318 datasize = sizeof(struct DE_eckd_data) +
2319 sizeof(struct LO_eckd_data) +
2320 sizeof(struct eckd_count) +
2321 rpt * nr_tracks * sizeof(struct eckd_count);
2323 case 0x04: /* Invalidate track. */
2324 case 0x0c: /* Invalidate track, use cdl. */
2327 datasize = sizeof(struct PFX_eckd_data) +
2328 sizeof(struct LO_eckd_data) +
2329 sizeof(struct eckd_count);
2331 datasize = sizeof(struct DE_eckd_data) +
2332 sizeof(struct LO_eckd_data) +
2333 sizeof(struct eckd_count);
2336 dev_warn(&startdev->cdev->dev,
2337 "An I/O control call used incorrect flags 0x%x\n",
2339 return ERR_PTR(-EINVAL);
2341 /* Allocate the format ccw request. */
2342 fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength,
2343 datasize, startdev, NULL);
2347 start_priv->count++;
2351 switch (intensity & ~0x08) {
2352 case 0x00: /* Normal format. */
2354 prefix(ccw++, (struct PFX_eckd_data *) data,
2355 fdata->start_unit, fdata->stop_unit,
2356 DASD_ECKD_CCW_WRITE_CKD, base, startdev);
2357 /* grant subsystem permission to format R0 */
2359 ((struct PFX_eckd_data *)data)
2360 ->define_extent.ga_extended |= 0x04;
2361 data += sizeof(struct PFX_eckd_data);
2363 define_extent(ccw++, (struct DE_eckd_data *) data,
2364 fdata->start_unit, fdata->stop_unit,
2365 DASD_ECKD_CCW_WRITE_CKD, startdev, 0);
2366 /* grant subsystem permission to format R0 */
2368 ((struct DE_eckd_data *) data)
2369 ->ga_extended |= 0x04;
2370 data += sizeof(struct DE_eckd_data);
2372 ccw[-1].flags |= CCW_FLAG_CC;
2373 locate_record(ccw++, (struct LO_eckd_data *) data,
2374 fdata->start_unit, 0, rpt*nr_tracks,
2375 DASD_ECKD_CCW_WRITE_CKD, base,
2377 data += sizeof(struct LO_eckd_data);
2379 case 0x01: /* Write record zero + format track. */
2381 prefix(ccw++, (struct PFX_eckd_data *) data,
2382 fdata->start_unit, fdata->stop_unit,
2383 DASD_ECKD_CCW_WRITE_RECORD_ZERO,
2385 data += sizeof(struct PFX_eckd_data);
2387 define_extent(ccw++, (struct DE_eckd_data *) data,
2388 fdata->start_unit, fdata->stop_unit,
2389 DASD_ECKD_CCW_WRITE_RECORD_ZERO, startdev, 0);
2390 data += sizeof(struct DE_eckd_data);
2392 ccw[-1].flags |= CCW_FLAG_CC;
2393 locate_record(ccw++, (struct LO_eckd_data *) data,
2394 fdata->start_unit, 0, rpt * nr_tracks + 1,
2395 DASD_ECKD_CCW_WRITE_RECORD_ZERO, base,
2396 base->block->bp_block);
2397 data += sizeof(struct LO_eckd_data);
2399 case 0x04: /* Invalidate track. */
2401 prefix(ccw++, (struct PFX_eckd_data *) data,
2402 fdata->start_unit, fdata->stop_unit,
2403 DASD_ECKD_CCW_WRITE_CKD, base, startdev);
2404 data += sizeof(struct PFX_eckd_data);
2406 define_extent(ccw++, (struct DE_eckd_data *) data,
2407 fdata->start_unit, fdata->stop_unit,
2408 DASD_ECKD_CCW_WRITE_CKD, startdev, 0);
2409 data += sizeof(struct DE_eckd_data);
2411 ccw[-1].flags |= CCW_FLAG_CC;
2412 locate_record(ccw++, (struct LO_eckd_data *) data,
2413 fdata->start_unit, 0, 1,
2414 DASD_ECKD_CCW_WRITE_CKD, base, 8);
2415 data += sizeof(struct LO_eckd_data);
2419 for (j = 0; j < nr_tracks; j++) {
2420 /* calculate cylinder and head for the current track */
2422 (fdata->start_unit + j) /
2423 base_priv->rdc_data.trk_per_cyl,
2424 (fdata->start_unit + j) %
2425 base_priv->rdc_data.trk_per_cyl);
2426 if (intensity & 0x01) { /* write record zero */
2427 ect = (struct eckd_count *) data;
2428 data += sizeof(struct eckd_count);
2429 ect->cyl = address.cyl;
2430 ect->head = address.head;
2434 ccw[-1].flags |= CCW_FLAG_CC;
2435 ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO;
2436 ccw->flags = CCW_FLAG_SLI;
2438 ccw->cda = (__u32)(addr_t) ect;
2441 if ((intensity & ~0x08) & 0x04) { /* erase track */
2442 ect = (struct eckd_count *) data;
2443 data += sizeof(struct eckd_count);
2444 ect->cyl = address.cyl;
2445 ect->head = address.head;
2449 ccw[-1].flags |= CCW_FLAG_CC;
2450 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD;
2451 ccw->flags = CCW_FLAG_SLI;
2453 ccw->cda = (__u32)(addr_t) ect;
2454 } else { /* write remaining records */
2455 for (i = 0; i < rpt; i++) {
2456 ect = (struct eckd_count *) data;
2457 data += sizeof(struct eckd_count);
2458 ect->cyl = address.cyl;
2459 ect->head = address.head;
2460 ect->record = i + 1;
2462 ect->dl = fdata->blksize;
2464 * Check for special tracks 0-1
2465 * when formatting CDL
2467 if ((intensity & 0x08) &&
2468 address.cyl == 0 && address.head == 0) {
2471 ect->dl = sizes_trk0[i] - 4;
2474 if ((intensity & 0x08) &&
2475 address.cyl == 0 && address.head == 1) {
2477 ect->dl = LABEL_SIZE - 44;
2479 ccw[-1].flags |= CCW_FLAG_CC;
2480 if (i != 0 || j == 0)
2482 DASD_ECKD_CCW_WRITE_CKD;
2485 DASD_ECKD_CCW_WRITE_CKD_MT;
2486 ccw->flags = CCW_FLAG_SLI;
2488 ccw->cda = (__u32)(addr_t) ect;
2494 fcp->startdev = startdev;
2495 fcp->memdev = startdev;
2496 fcp->basedev = base;
2498 fcp->expires = startdev->default_expires * HZ;
2499 fcp->buildclk = get_tod_clock();
2500 fcp->status = DASD_CQR_FILLED;
2506 * Wrapper function to build a CCW request depending on input data
2508 static struct dasd_ccw_req *
2509 dasd_eckd_format_build_ccw_req(struct dasd_device *base,
2510 struct format_data_t *fdata, int enable_pav,
2511 int tpm, struct eckd_count *fmt_buffer, int rpt)
2513 struct dasd_ccw_req *ccw_req;
2516 ccw_req = dasd_eckd_build_format(base, fdata, enable_pav);
2519 ccw_req = dasd_eckd_build_check_tcw(base, fdata,
2523 ccw_req = dasd_eckd_build_check(base, fdata, enable_pav,
2531 * Sanity checks on format_data
2533 static int dasd_eckd_format_sanity_checks(struct dasd_device *base,
2534 struct format_data_t *fdata)
2536 struct dasd_eckd_private *private = base->private;
2538 if (fdata->start_unit >=
2539 (private->real_cyl * private->rdc_data.trk_per_cyl)) {
2540 dev_warn(&base->cdev->dev,
2541 "Start track number %u used in formatting is too big\n",
2545 if (fdata->stop_unit >=
2546 (private->real_cyl * private->rdc_data.trk_per_cyl)) {
2547 dev_warn(&base->cdev->dev,
2548 "Stop track number %u used in formatting is too big\n",
2552 if (fdata->start_unit > fdata->stop_unit) {
2553 dev_warn(&base->cdev->dev,
2554 "Start track %u used in formatting exceeds end track\n",
2558 if (dasd_check_blocksize(fdata->blksize) != 0) {
2559 dev_warn(&base->cdev->dev,
2560 "The DASD cannot be formatted with block size %u\n",
2568 * This function will process format_data originally coming from an IOCTL
2570 static int dasd_eckd_format_process_data(struct dasd_device *base,
2571 struct format_data_t *fdata,
2572 int enable_pav, int tpm,
2573 struct eckd_count *fmt_buffer, int rpt,
2576 struct dasd_eckd_private *private = base->private;
2577 struct dasd_ccw_req *cqr, *n;
2578 struct list_head format_queue;
2579 struct dasd_device *device;
2581 int old_start, old_stop, format_step;
2585 rc = dasd_eckd_format_sanity_checks(base, fdata);
2589 INIT_LIST_HEAD(&format_queue);
2591 old_start = fdata->start_unit;
2592 old_stop = fdata->stop_unit;
2594 if (!tpm && fmt_buffer != NULL) {
2595 /* Command Mode / Format Check */
2597 } else if (tpm && fmt_buffer != NULL) {
2598 /* Transport Mode / Format Check */
2599 format_step = DASD_CQR_MAX_CCW / rpt;
2601 /* Normal Formatting */
2602 format_step = DASD_CQR_MAX_CCW /
2603 recs_per_track(&private->rdc_data, 0, fdata->blksize);
2608 while (fdata->start_unit <= old_stop) {
2609 step = fdata->stop_unit - fdata->start_unit + 1;
2610 if (step > format_step) {
2612 fdata->start_unit + format_step - 1;
2615 cqr = dasd_eckd_format_build_ccw_req(base, fdata,
2620 if (rc == -ENOMEM) {
2621 if (list_empty(&format_queue))
2624 * not enough memory available, start
2625 * requests retry after first requests
2633 list_add_tail(&cqr->blocklist, &format_queue);
2636 step = fdata->stop_unit - fdata->start_unit + 1;
2637 fmt_buffer += rpt * step;
2639 fdata->start_unit = fdata->stop_unit + 1;
2640 fdata->stop_unit = old_stop;
2643 rc = dasd_sleep_on_queue(&format_queue);
2646 list_for_each_entry_safe(cqr, n, &format_queue, blocklist) {
2647 device = cqr->startdev;
2648 private = device->private;
2650 if (cqr->status == DASD_CQR_FAILED) {
2652 * Only get sense data if called by format
2655 if (fmt_buffer && irb) {
2656 sense = dasd_get_sense(&cqr->irb);
2657 memcpy(irb, &cqr->irb, sizeof(*irb));
2661 list_del_init(&cqr->blocklist);
2662 dasd_sfree_request(cqr, device);
2666 if (rc && rc != -EIO)
2670 * In case fewer than the expected records are on the
2671 * track, we will most likely get a 'No Record Found'
2672 * error (in command mode) or a 'File Protected' error
2673 * (in transport mode). Those particular cases shouldn't
2674 * pass the -EIO to the IOCTL, therefore reset the rc
2678 (sense[1] & SNS1_NO_REC_FOUND ||
2679 sense[1] & SNS1_FILE_PROTECTED))
2688 fdata->start_unit = old_start;
2689 fdata->stop_unit = old_stop;
2694 static int dasd_eckd_format_device(struct dasd_device *base,
2695 struct format_data_t *fdata, int enable_pav)
2697 return dasd_eckd_format_process_data(base, fdata, enable_pav, 0, NULL,
2702 * Helper function to count consecutive records of a single track.
2704 static int dasd_eckd_count_records(struct eckd_count *fmt_buffer, int start,
2710 head = fmt_buffer[start].head;
2713 * There are 3 conditions where we stop counting:
2714 * - if data reoccurs (same head and record may reoccur), which may
2715 * happen due to the way DASD_ECKD_CCW_READ_COUNT works
2716 * - when the head changes, because we're iterating over several tracks
2717 * then (DASD_ECKD_CCW_READ_COUNT_MT)
2718 * - when we've reached the end of sensible data in the buffer (the
2719 * record will be 0 then)
2721 for (i = start; i < max; i++) {
2723 if ((fmt_buffer[i].head == head &&
2724 fmt_buffer[i].record == 1) ||
2725 fmt_buffer[i].head != head ||
2726 fmt_buffer[i].record == 0)
2735 * Evaluate a given range of tracks. Data like number of records, blocksize,
2736 * record ids, and key length are compared with expected data.
2738 * If a mismatch occurs, the corresponding error bit is set, as well as
2739 * additional information, depending on the error.
2741 static void dasd_eckd_format_evaluate_tracks(struct eckd_count *fmt_buffer,
2742 struct format_check_t *cdata,
2743 int rpt_max, int rpt_exp,
2744 int trk_per_cyl, int tpm)
2755 trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1;
2756 max_entries = trkcount * rpt_max;
2758 for (i = cdata->expect.start_unit; i <= cdata->expect.stop_unit; i++) {
2759 /* Calculate the correct next starting position in the buffer */
2761 while (fmt_buffer[pos].record == 0 &&
2762 fmt_buffer[pos].dl == 0) {
2763 if (pos++ > max_entries)
2767 if (i != cdata->expect.start_unit)
2768 pos += rpt_max - count;
2771 /* Calculate the expected geo values for the current track */
2772 set_ch_t(&geo, i / trk_per_cyl, i % trk_per_cyl);
2774 /* Count and check number of records */
2775 count = dasd_eckd_count_records(fmt_buffer, pos, pos + rpt_max);
2777 if (count < rpt_exp) {
2778 cdata->result = DASD_FMT_ERR_TOO_FEW_RECORDS;
2781 if (count > rpt_exp) {
2782 cdata->result = DASD_FMT_ERR_TOO_MANY_RECORDS;
2786 for (j = 0; j < count; j++, pos++) {
2787 blksize = cdata->expect.blksize;
2791 * Set special values when checking CDL formatted
2794 if ((cdata->expect.intensity & 0x08) &&
2795 geo.cyl == 0 && geo.head == 0) {
2797 blksize = sizes_trk0[j] - 4;
2801 if ((cdata->expect.intensity & 0x08) &&
2802 geo.cyl == 0 && geo.head == 1) {
2803 blksize = LABEL_SIZE - 44;
2807 /* Check blocksize */
2808 if (fmt_buffer[pos].dl != blksize) {
2809 cdata->result = DASD_FMT_ERR_BLKSIZE;
2812 /* Check if key length is 0 */
2813 if (fmt_buffer[pos].kl != kl) {
2814 cdata->result = DASD_FMT_ERR_KEY_LENGTH;
2817 /* Check if record_id is correct */
2818 if (fmt_buffer[pos].cyl != geo.cyl ||
2819 fmt_buffer[pos].head != geo.head ||
2820 fmt_buffer[pos].record != (j + 1)) {
2821 cdata->result = DASD_FMT_ERR_RECORD_ID;
2829 * In case of no errors, we need to decrease by one
2830 * to get the correct positions.
2832 if (!cdata->result) {
2838 cdata->num_records = count;
2839 cdata->rec = fmt_buffer[pos].record;
2840 cdata->blksize = fmt_buffer[pos].dl;
2841 cdata->key_length = fmt_buffer[pos].kl;
2845 * Check the format of a range of tracks of a DASD.
2847 static int dasd_eckd_check_device_format(struct dasd_device *base,
2848 struct format_check_t *cdata,
2851 struct dasd_eckd_private *private = base->private;
2852 struct eckd_count *fmt_buffer;
2854 int rpt_max, rpt_exp;
2855 int fmt_buffer_size;
2861 trk_per_cyl = private->rdc_data.trk_per_cyl;
2863 /* Get maximum and expected amount of records per track */
2864 rpt_max = recs_per_track(&private->rdc_data, 0, 512) + 1;
2865 rpt_exp = recs_per_track(&private->rdc_data, 0, cdata->expect.blksize);
2867 trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1;
2868 fmt_buffer_size = trkcount * rpt_max * sizeof(struct eckd_count);
2870 fmt_buffer = kzalloc(fmt_buffer_size, GFP_KERNEL | GFP_DMA);
2875 * A certain FICON feature subset is needed to operate in transport
2876 * mode. Additionally, the support for transport mode is implicitly
2877 * checked by comparing the buffer size with fcx_max_data. As long as
2878 * the buffer size is smaller we can operate in transport mode and
2879 * process multiple tracks. If not, only one track at once is being
2880 * processed using command mode.
2882 if ((private->features.feature[40] & 0x04) &&
2883 fmt_buffer_size <= private->fcx_max_data)
2886 rc = dasd_eckd_format_process_data(base, &cdata->expect, enable_pav,
2887 tpm, fmt_buffer, rpt_max, &irb);
2888 if (rc && rc != -EIO)
2892 * If our first attempt with transport mode enabled comes back
2893 * with an incorrect length error, we're going to retry the
2894 * check with command mode.
2896 if (tpm && scsw_cstat(&irb.scsw) == 0x40) {
2898 rc = dasd_eckd_format_process_data(base, &cdata->expect,
2900 fmt_buffer, rpt_max,
2909 dasd_eckd_format_evaluate_tracks(fmt_buffer, cdata, rpt_max, rpt_exp,
2918 static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr)
2920 if (cqr->retries < 0) {
2921 cqr->status = DASD_CQR_FAILED;
2924 cqr->status = DASD_CQR_FILLED;
2925 if (cqr->block && (cqr->startdev != cqr->block->base)) {
2926 dasd_eckd_reset_ccw_to_base_io(cqr);
2927 cqr->startdev = cqr->block->base;
2928 cqr->lpm = dasd_path_get_opm(cqr->block->base);
2932 static dasd_erp_fn_t
2933 dasd_eckd_erp_action(struct dasd_ccw_req * cqr)
2935 struct dasd_device *device = (struct dasd_device *) cqr->startdev;
2936 struct ccw_device *cdev = device->cdev;
2938 switch (cdev->id.cu_type) {
2943 return dasd_3990_erp_action;
2947 return dasd_default_erp_action;
2951 static dasd_erp_fn_t
2952 dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr)
2954 return dasd_default_erp_postaction;
2957 static void dasd_eckd_check_for_device_change(struct dasd_device *device,
2958 struct dasd_ccw_req *cqr,
2963 struct dasd_eckd_private *private = device->private;
2965 /* first of all check for state change pending interrupt */
2966 mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP;
2967 if ((scsw_dstat(&irb->scsw) & mask) == mask) {
2969 * for alias only, not in offline processing
2970 * and only if not suspended
2972 if (!device->block && private->lcu &&
2973 device->state == DASD_STATE_ONLINE &&
2974 !test_bit(DASD_FLAG_OFFLINE, &device->flags) &&
2975 !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) {
2976 /* schedule worker to reload device */
2977 dasd_reload_device(device);
2979 dasd_generic_handle_state_change(device);
2983 sense = dasd_get_sense(irb);
2987 /* summary unit check */
2988 if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) &&
2989 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) {
2990 if (test_and_set_bit(DASD_FLAG_SUC, &device->flags)) {
2991 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2992 "eckd suc: device already notified");
2995 sense = dasd_get_sense(irb);
2997 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2998 "eckd suc: no reason code available");
2999 clear_bit(DASD_FLAG_SUC, &device->flags);
3003 private->suc_reason = sense[8];
3004 DBF_DEV_EVENT(DBF_NOTICE, device, "%s %x",
3005 "eckd handle summary unit check: reason",
3006 private->suc_reason);
3007 dasd_get_device(device);
3008 if (!schedule_work(&device->suc_work))
3009 dasd_put_device(device);
3014 /* service information message SIM */
3015 if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) &&
3016 ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) {
3017 dasd_3990_erp_handle_sim(device, sense);
3021 /* loss of device reservation is handled via base devices only
3022 * as alias devices may be used with several bases
3024 if (device->block && (sense[27] & DASD_SENSE_BIT_0) &&
3025 (sense[7] == 0x3F) &&
3026 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) &&
3027 test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) {
3028 if (device->features & DASD_FEATURE_FAILONSLCK)
3029 set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags);
3030 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags);
3031 dev_err(&device->cdev->dev,
3032 "The device reservation was lost\n");
3036 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single(
3037 struct dasd_device *startdev,
3038 struct dasd_block *block,
3039 struct request *req,
3044 unsigned int first_offs,
3045 unsigned int last_offs,
3046 unsigned int blk_per_trk,
3047 unsigned int blksize)
3049 struct dasd_eckd_private *private;
3050 unsigned long *idaws;
3051 struct LO_eckd_data *LO_data;
3052 struct dasd_ccw_req *cqr;
3054 struct req_iterator iter;
3058 int count, cidaw, cplength, datasize;
3060 unsigned char cmd, rcmd;
3062 struct dasd_device *basedev;
3064 basedev = block->base;
3065 private = basedev->private;
3066 if (rq_data_dir(req) == READ)
3067 cmd = DASD_ECKD_CCW_READ_MT;
3068 else if (rq_data_dir(req) == WRITE)
3069 cmd = DASD_ECKD_CCW_WRITE_MT;
3071 return ERR_PTR(-EINVAL);
3073 /* Check struct bio and count the number of blocks for the request. */
3076 rq_for_each_segment(bv, req, iter) {
3077 if (bv.bv_len & (blksize - 1))
3078 /* Eckd can only do full blocks. */
3079 return ERR_PTR(-EINVAL);
3080 count += bv.bv_len >> (block->s2b_shift + 9);
3081 if (idal_is_needed (page_address(bv.bv_page), bv.bv_len))
3082 cidaw += bv.bv_len >> (block->s2b_shift + 9);
3085 if (count != last_rec - first_rec + 1)
3086 return ERR_PTR(-EINVAL);
3088 /* use the prefix command if available */
3089 use_prefix = private->features.feature[8] & 0x01;
3091 /* 1x prefix + number of blocks */
3092 cplength = 2 + count;
3093 /* 1x prefix + cidaws*sizeof(long) */
3094 datasize = sizeof(struct PFX_eckd_data) +
3095 sizeof(struct LO_eckd_data) +
3096 cidaw * sizeof(unsigned long);
3098 /* 1x define extent + 1x locate record + number of blocks */
3099 cplength = 2 + count;
3100 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */
3101 datasize = sizeof(struct DE_eckd_data) +
3102 sizeof(struct LO_eckd_data) +
3103 cidaw * sizeof(unsigned long);
3105 /* Find out the number of additional locate record ccws for cdl. */
3106 if (private->uses_cdl && first_rec < 2*blk_per_trk) {
3107 if (last_rec >= 2*blk_per_trk)
3108 count = 2*blk_per_trk - first_rec;
3110 datasize += count*sizeof(struct LO_eckd_data);
3112 /* Allocate the ccw request. */
3113 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
3114 startdev, blk_mq_rq_to_pdu(req));
3118 /* First ccw is define extent or prefix. */
3120 if (prefix(ccw++, cqr->data, first_trk,
3121 last_trk, cmd, basedev, startdev) == -EAGAIN) {
3122 /* Clock not in sync and XRC is enabled.
3125 dasd_sfree_request(cqr, startdev);
3126 return ERR_PTR(-EAGAIN);
3128 idaws = (unsigned long *) (cqr->data +
3129 sizeof(struct PFX_eckd_data));
3131 if (define_extent(ccw++, cqr->data, first_trk,
3132 last_trk, cmd, basedev, 0) == -EAGAIN) {
3133 /* Clock not in sync and XRC is enabled.
3136 dasd_sfree_request(cqr, startdev);
3137 return ERR_PTR(-EAGAIN);
3139 idaws = (unsigned long *) (cqr->data +
3140 sizeof(struct DE_eckd_data));
3142 /* Build locate_record+read/write/ccws. */
3143 LO_data = (struct LO_eckd_data *) (idaws + cidaw);
3145 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) {
3146 /* Only standard blocks so there is just one locate record. */
3147 ccw[-1].flags |= CCW_FLAG_CC;
3148 locate_record(ccw++, LO_data++, first_trk, first_offs + 1,
3149 last_rec - recid + 1, cmd, basedev, blksize);
3151 rq_for_each_segment(bv, req, iter) {
3152 dst = page_address(bv.bv_page) + bv.bv_offset;
3153 if (dasd_page_cache) {
3154 char *copy = kmem_cache_alloc(dasd_page_cache,
3155 GFP_DMA | __GFP_NOWARN);
3156 if (copy && rq_data_dir(req) == WRITE)
3157 memcpy(copy + bv.bv_offset, dst, bv.bv_len);
3159 dst = copy + bv.bv_offset;
3161 for (off = 0; off < bv.bv_len; off += blksize) {
3162 sector_t trkid = recid;
3163 unsigned int recoffs = sector_div(trkid, blk_per_trk);
3166 /* Locate record for cdl special block ? */
3167 if (private->uses_cdl && recid < 2*blk_per_trk) {
3168 if (dasd_eckd_cdl_special(blk_per_trk, recid)){
3170 count = dasd_eckd_cdl_reclen(recid);
3171 if (count < blksize &&
3172 rq_data_dir(req) == READ)
3173 memset(dst + count, 0xe5,
3176 ccw[-1].flags |= CCW_FLAG_CC;
3177 locate_record(ccw++, LO_data++,
3179 1, rcmd, basedev, count);
3181 /* Locate record for standard blocks ? */
3182 if (private->uses_cdl && recid == 2*blk_per_trk) {
3183 ccw[-1].flags |= CCW_FLAG_CC;
3184 locate_record(ccw++, LO_data++,
3186 last_rec - recid + 1,
3187 cmd, basedev, count);
3189 /* Read/write ccw. */
3190 ccw[-1].flags |= CCW_FLAG_CC;
3191 ccw->cmd_code = rcmd;
3193 if (idal_is_needed(dst, blksize)) {
3194 ccw->cda = (__u32)(addr_t) idaws;
3195 ccw->flags = CCW_FLAG_IDA;
3196 idaws = idal_create_words(idaws, dst, blksize);
3198 ccw->cda = (__u32)(addr_t) dst;
3206 if (blk_noretry_request(req) ||
3207 block->base->features & DASD_FEATURE_FAILFAST)
3208 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
3209 cqr->startdev = startdev;
3210 cqr->memdev = startdev;
3212 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
3213 cqr->lpm = dasd_path_get_ppm(startdev);
3214 cqr->retries = startdev->default_retries;
3215 cqr->buildclk = get_tod_clock();
3216 cqr->status = DASD_CQR_FILLED;
3220 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track(
3221 struct dasd_device *startdev,
3222 struct dasd_block *block,
3223 struct request *req,
3228 unsigned int first_offs,
3229 unsigned int last_offs,
3230 unsigned int blk_per_trk,
3231 unsigned int blksize)
3233 unsigned long *idaws;
3234 struct dasd_ccw_req *cqr;
3236 struct req_iterator iter;
3238 char *dst, *idaw_dst;
3239 unsigned int cidaw, cplength, datasize;
3243 struct dasd_device *basedev;
3244 unsigned int trkcount, count, count_to_trk_end;
3245 unsigned int idaw_len, seg_len, part_len, len_to_track_end;
3246 unsigned char new_track, end_idaw;
3248 unsigned int recoffs;
3250 basedev = block->base;
3251 if (rq_data_dir(req) == READ)
3252 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
3253 else if (rq_data_dir(req) == WRITE)
3254 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
3256 return ERR_PTR(-EINVAL);
3258 /* Track based I/O needs IDAWs for each page, and not just for
3259 * 64 bit addresses. We need additional idals for pages
3260 * that get filled from two tracks, so we use the number
3261 * of records as upper limit.
3263 cidaw = last_rec - first_rec + 1;
3264 trkcount = last_trk - first_trk + 1;
3266 /* 1x prefix + one read/write ccw per track */
3267 cplength = 1 + trkcount;
3269 datasize = sizeof(struct PFX_eckd_data) + cidaw * sizeof(unsigned long);
3271 /* Allocate the ccw request. */
3272 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
3273 startdev, blk_mq_rq_to_pdu(req));
3277 /* transfer length factor: how many bytes to read from the last track */
3278 if (first_trk == last_trk)
3279 tlf = last_offs - first_offs + 1;
3281 tlf = last_offs + 1;
3284 if (prefix_LRE(ccw++, cqr->data, first_trk,
3285 last_trk, cmd, basedev, startdev,
3286 1 /* format */, first_offs + 1,
3289 /* Clock not in sync and XRC is enabled.
3292 dasd_sfree_request(cqr, startdev);
3293 return ERR_PTR(-EAGAIN);
3297 * The translation of request into ccw programs must meet the
3298 * following conditions:
3299 * - all idaws but the first and the last must address full pages
3300 * (or 2K blocks on 31-bit)
3301 * - the scope of a ccw and it's idal ends with the track boundaries
3303 idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data));
3307 len_to_track_end = 0;
3310 rq_for_each_segment(bv, req, iter) {
3311 dst = page_address(bv.bv_page) + bv.bv_offset;
3312 seg_len = bv.bv_len;
3316 recoffs = sector_div(trkid, blk_per_trk);
3317 count_to_trk_end = blk_per_trk - recoffs;
3318 count = min((last_rec - recid + 1),
3319 (sector_t)count_to_trk_end);
3320 len_to_track_end = count * blksize;
3321 ccw[-1].flags |= CCW_FLAG_CC;
3322 ccw->cmd_code = cmd;
3323 ccw->count = len_to_track_end;
3324 ccw->cda = (__u32)(addr_t)idaws;
3325 ccw->flags = CCW_FLAG_IDA;
3329 /* first idaw for a ccw may start anywhere */
3333 /* If we start a new idaw, we must make sure that it
3334 * starts on an IDA_BLOCK_SIZE boundary.
3335 * If we continue an idaw, we must make sure that the
3336 * current segment begins where the so far accumulated
3340 if (__pa(dst) & (IDA_BLOCK_SIZE-1)) {
3341 dasd_sfree_request(cqr, startdev);
3342 return ERR_PTR(-ERANGE);
3346 if ((idaw_dst + idaw_len) != dst) {
3347 dasd_sfree_request(cqr, startdev);
3348 return ERR_PTR(-ERANGE);
3350 part_len = min(seg_len, len_to_track_end);
3351 seg_len -= part_len;
3353 idaw_len += part_len;
3354 len_to_track_end -= part_len;
3355 /* collected memory area ends on an IDA_BLOCK border,
3357 * idal_create_words will handle cases where idaw_len
3358 * is larger then IDA_BLOCK_SIZE
3360 if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1)))
3362 /* We also need to end the idaw at track end */
3363 if (!len_to_track_end) {
3368 idaws = idal_create_words(idaws, idaw_dst,
3377 if (blk_noretry_request(req) ||
3378 block->base->features & DASD_FEATURE_FAILFAST)
3379 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
3380 cqr->startdev = startdev;
3381 cqr->memdev = startdev;
3383 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
3384 cqr->lpm = dasd_path_get_ppm(startdev);
3385 cqr->retries = startdev->default_retries;
3386 cqr->buildclk = get_tod_clock();
3387 cqr->status = DASD_CQR_FILLED;
3391 static int prepare_itcw(struct itcw *itcw,
3392 unsigned int trk, unsigned int totrk, int cmd,
3393 struct dasd_device *basedev,
3394 struct dasd_device *startdev,
3395 unsigned int rec_on_trk, int count,
3396 unsigned int blksize,
3397 unsigned int total_data_size,
3399 unsigned int blk_per_trk)
3401 struct PFX_eckd_data pfxdata;
3402 struct dasd_eckd_private *basepriv, *startpriv;
3403 struct DE_eckd_data *dedata;
3404 struct LRE_eckd_data *lredata;
3408 u16 heads, beghead, endhead;
3416 /* setup prefix data */
3417 basepriv = basedev->private;
3418 startpriv = startdev->private;
3419 dedata = &pfxdata.define_extent;
3420 lredata = &pfxdata.locate_record;
3422 memset(&pfxdata, 0, sizeof(pfxdata));
3423 pfxdata.format = 1; /* PFX with LRE */
3424 pfxdata.base_address = basepriv->ned->unit_addr;
3425 pfxdata.base_lss = basepriv->ned->ID;
3426 pfxdata.validity.define_extent = 1;
3428 /* private uid is kept up to date, conf_data may be outdated */
3429 if (startpriv->uid.type == UA_BASE_PAV_ALIAS)
3430 pfxdata.validity.verify_base = 1;
3432 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) {
3433 pfxdata.validity.verify_base = 1;
3434 pfxdata.validity.hyper_pav = 1;
3438 case DASD_ECKD_CCW_READ_TRACK_DATA:
3439 dedata->mask.perm = 0x1;
3440 dedata->attributes.operation = basepriv->attrib.operation;
3441 dedata->blk_size = blksize;
3442 dedata->ga_extended |= 0x42;
3443 lredata->operation.orientation = 0x0;
3444 lredata->operation.operation = 0x0C;
3445 lredata->auxiliary.check_bytes = 0x01;
3446 pfx_cmd = DASD_ECKD_CCW_PFX_READ;
3448 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
3449 dedata->mask.perm = 0x02;
3450 dedata->attributes.operation = basepriv->attrib.operation;
3451 dedata->blk_size = blksize;
3452 rc = set_timestamp(NULL, dedata, basedev);
3453 dedata->ga_extended |= 0x42;
3454 lredata->operation.orientation = 0x0;
3455 lredata->operation.operation = 0x3F;
3456 lredata->extended_operation = 0x23;
3457 lredata->auxiliary.check_bytes = 0x2;
3459 * If XRC is supported the System Time Stamp is set. The
3460 * validity of the time stamp must be reflected in the prefix
3463 if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02)
3464 pfxdata.validity.time_stamp = 1; /* 'Time Stamp Valid' */
3465 pfx_cmd = DASD_ECKD_CCW_PFX;
3467 case DASD_ECKD_CCW_READ_COUNT_MT:
3468 dedata->mask.perm = 0x1;
3469 dedata->attributes.operation = DASD_BYPASS_CACHE;
3470 dedata->ga_extended |= 0x42;
3471 dedata->blk_size = blksize;
3472 lredata->operation.orientation = 0x2;
3473 lredata->operation.operation = 0x16;
3474 lredata->auxiliary.check_bytes = 0x01;
3475 pfx_cmd = DASD_ECKD_CCW_PFX_READ;
3478 DBF_DEV_EVENT(DBF_ERR, basedev,
3479 "prepare itcw, unknown opcode 0x%x", cmd);
3486 dedata->attributes.mode = 0x3; /* ECKD */
3488 heads = basepriv->rdc_data.trk_per_cyl;
3489 begcyl = trk / heads;
3490 beghead = trk % heads;
3491 endcyl = totrk / heads;
3492 endhead = totrk % heads;
3494 /* check for sequential prestage - enhance cylinder range */
3495 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE ||
3496 dedata->attributes.operation == DASD_SEQ_ACCESS) {
3498 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl)
3499 endcyl += basepriv->attrib.nr_cyl;
3501 endcyl = (basepriv->real_cyl - 1);
3504 set_ch_t(&dedata->beg_ext, begcyl, beghead);
3505 set_ch_t(&dedata->end_ext, endcyl, endhead);
3507 dedata->ep_format = 0x20; /* records per track is valid */
3508 dedata->ep_rec_per_track = blk_per_trk;
3511 switch (basepriv->rdc_data.dev_type) {
3513 dn = ceil_quot(blksize + 6, 232);
3514 d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34);
3515 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
3518 d = 7 + ceil_quot(blksize + 12, 32);
3519 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
3524 if (cmd == DASD_ECKD_CCW_READ_COUNT_MT) {
3525 lredata->auxiliary.length_valid = 0;
3526 lredata->auxiliary.length_scope = 0;
3527 lredata->sector = 0xff;
3529 lredata->auxiliary.length_valid = 1;
3530 lredata->auxiliary.length_scope = 1;
3531 lredata->sector = sector;
3533 lredata->auxiliary.imbedded_ccw_valid = 1;
3534 lredata->length = tlf;
3535 lredata->imbedded_ccw = cmd;
3536 lredata->count = count;
3537 set_ch_t(&lredata->seek_addr, begcyl, beghead);
3538 lredata->search_arg.cyl = lredata->seek_addr.cyl;
3539 lredata->search_arg.head = lredata->seek_addr.head;
3540 lredata->search_arg.record = rec_on_trk;
3542 dcw = itcw_add_dcw(itcw, pfx_cmd, 0,
3543 &pfxdata, sizeof(pfxdata), total_data_size);
3544 return PTR_ERR_OR_ZERO(dcw);
3547 static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track(
3548 struct dasd_device *startdev,
3549 struct dasd_block *block,
3550 struct request *req,
3555 unsigned int first_offs,
3556 unsigned int last_offs,
3557 unsigned int blk_per_trk,
3558 unsigned int blksize)
3560 struct dasd_ccw_req *cqr;
3561 struct req_iterator iter;
3564 unsigned int trkcount, ctidaw;
3566 struct dasd_device *basedev;
3569 struct tidaw *last_tidaw = NULL;
3573 unsigned int seg_len, part_len, len_to_track_end;
3574 unsigned char new_track;
3575 sector_t recid, trkid;
3577 unsigned int count, count_to_trk_end;
3580 basedev = block->base;
3581 if (rq_data_dir(req) == READ) {
3582 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
3583 itcw_op = ITCW_OP_READ;
3584 } else if (rq_data_dir(req) == WRITE) {
3585 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
3586 itcw_op = ITCW_OP_WRITE;
3588 return ERR_PTR(-EINVAL);
3590 /* trackbased I/O needs address all memory via TIDAWs,
3591 * not just for 64 bit addresses. This allows us to map
3592 * each segment directly to one tidaw.
3593 * In the case of write requests, additional tidaws may
3594 * be needed when a segment crosses a track boundary.
3596 trkcount = last_trk - first_trk + 1;
3598 rq_for_each_segment(bv, req, iter) {
3601 if (rq_data_dir(req) == WRITE)
3602 ctidaw += (last_trk - first_trk);
3604 /* Allocate the ccw request. */
3605 itcw_size = itcw_calc_size(0, ctidaw, 0);
3606 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev,
3607 blk_mq_rq_to_pdu(req));
3611 /* transfer length factor: how many bytes to read from the last track */
3612 if (first_trk == last_trk)
3613 tlf = last_offs - first_offs + 1;
3615 tlf = last_offs + 1;
3618 itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0);
3623 cqr->cpaddr = itcw_get_tcw(itcw);
3624 if (prepare_itcw(itcw, first_trk, last_trk,
3625 cmd, basedev, startdev,
3628 (last_rec - first_rec + 1) * blksize,
3629 tlf, blk_per_trk) == -EAGAIN) {
3630 /* Clock not in sync and XRC is enabled.
3636 len_to_track_end = 0;
3638 * A tidaw can address 4k of memory, but must not cross page boundaries
3639 * We can let the block layer handle this by setting
3640 * blk_queue_segment_boundary to page boundaries and
3641 * blk_max_segment_size to page size when setting up the request queue.
3642 * For write requests, a TIDAW must not cross track boundaries, because
3643 * we have to set the CBC flag on the last tidaw for each track.
3645 if (rq_data_dir(req) == WRITE) {
3648 rq_for_each_segment(bv, req, iter) {
3649 dst = page_address(bv.bv_page) + bv.bv_offset;
3650 seg_len = bv.bv_len;
3654 offs = sector_div(trkid, blk_per_trk);
3655 count_to_trk_end = blk_per_trk - offs;
3656 count = min((last_rec - recid + 1),
3657 (sector_t)count_to_trk_end);
3658 len_to_track_end = count * blksize;
3662 part_len = min(seg_len, len_to_track_end);
3663 seg_len -= part_len;
3664 len_to_track_end -= part_len;
3665 /* We need to end the tidaw at track end */
3666 if (!len_to_track_end) {
3668 tidaw_flags = TIDAW_FLAGS_INSERT_CBC;
3671 last_tidaw = itcw_add_tidaw(itcw, tidaw_flags,
3673 if (IS_ERR(last_tidaw)) {
3681 rq_for_each_segment(bv, req, iter) {
3682 dst = page_address(bv.bv_page) + bv.bv_offset;
3683 last_tidaw = itcw_add_tidaw(itcw, 0x00,
3685 if (IS_ERR(last_tidaw)) {
3691 last_tidaw->flags |= TIDAW_FLAGS_LAST;
3692 last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC;
3693 itcw_finalize(itcw);
3695 if (blk_noretry_request(req) ||
3696 block->base->features & DASD_FEATURE_FAILFAST)
3697 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
3699 cqr->startdev = startdev;
3700 cqr->memdev = startdev;
3702 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
3703 cqr->lpm = dasd_path_get_ppm(startdev);
3704 cqr->retries = startdev->default_retries;
3705 cqr->buildclk = get_tod_clock();
3706 cqr->status = DASD_CQR_FILLED;
3709 dasd_sfree_request(cqr, startdev);
3710 return ERR_PTR(ret);
3713 static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev,
3714 struct dasd_block *block,
3715 struct request *req)
3720 struct dasd_eckd_private *private;
3721 struct dasd_device *basedev;
3722 sector_t first_rec, last_rec;
3723 sector_t first_trk, last_trk;
3724 unsigned int first_offs, last_offs;
3725 unsigned int blk_per_trk, blksize;
3727 unsigned int data_size;
3728 struct dasd_ccw_req *cqr;
3730 basedev = block->base;
3731 private = basedev->private;
3733 /* Calculate number of blocks/records per track. */
3734 blksize = block->bp_block;
3735 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
3736 if (blk_per_trk == 0)
3737 return ERR_PTR(-EINVAL);
3738 /* Calculate record id of first and last block. */
3739 first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift;
3740 first_offs = sector_div(first_trk, blk_per_trk);
3741 last_rec = last_trk =
3742 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift;
3743 last_offs = sector_div(last_trk, blk_per_trk);
3744 cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk);
3746 fcx_multitrack = private->features.feature[40] & 0x20;
3747 data_size = blk_rq_bytes(req);
3748 if (data_size % blksize)
3749 return ERR_PTR(-EINVAL);
3750 /* tpm write request add CBC data on each track boundary */
3751 if (rq_data_dir(req) == WRITE)
3752 data_size += (last_trk - first_trk) * 4;
3754 /* is read track data and write track data in command mode supported? */
3755 cmdrtd = private->features.feature[9] & 0x20;
3756 cmdwtd = private->features.feature[12] & 0x40;
3757 use_prefix = private->features.feature[8] & 0x01;
3760 if (cdlspecial || dasd_page_cache) {
3761 /* do nothing, just fall through to the cmd mode single case */
3762 } else if ((data_size <= private->fcx_max_data)
3763 && (fcx_multitrack || (first_trk == last_trk))) {
3764 cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req,
3765 first_rec, last_rec,
3766 first_trk, last_trk,
3767 first_offs, last_offs,
3768 blk_per_trk, blksize);
3769 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) &&
3770 (PTR_ERR(cqr) != -ENOMEM))
3772 } else if (use_prefix &&
3773 (((rq_data_dir(req) == READ) && cmdrtd) ||
3774 ((rq_data_dir(req) == WRITE) && cmdwtd))) {
3775 cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req,
3776 first_rec, last_rec,
3777 first_trk, last_trk,
3778 first_offs, last_offs,
3779 blk_per_trk, blksize);
3780 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) &&
3781 (PTR_ERR(cqr) != -ENOMEM))
3785 cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req,
3786 first_rec, last_rec,
3787 first_trk, last_trk,
3788 first_offs, last_offs,
3789 blk_per_trk, blksize);
3793 static struct dasd_ccw_req *dasd_eckd_build_cp_raw(struct dasd_device *startdev,
3794 struct dasd_block *block,
3795 struct request *req)
3797 sector_t start_padding_sectors, end_sector_offset, end_padding_sectors;
3798 unsigned int seg_len, len_to_track_end;
3799 unsigned int cidaw, cplength, datasize;
3800 sector_t first_trk, last_trk, sectors;
3801 struct dasd_eckd_private *base_priv;
3802 struct dasd_device *basedev;
3803 struct req_iterator iter;
3804 struct dasd_ccw_req *cqr;
3805 unsigned int first_offs;
3806 unsigned int trkcount;
3807 unsigned long *idaws;
3817 * raw track access needs to be mutiple of 64k and on 64k boundary
3818 * For read requests we can fix an incorrect alignment by padding
3819 * the request with dummy pages.
3821 start_padding_sectors = blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK;
3822 end_sector_offset = (blk_rq_pos(req) + blk_rq_sectors(req)) %
3823 DASD_RAW_SECTORS_PER_TRACK;
3824 end_padding_sectors = (DASD_RAW_SECTORS_PER_TRACK - end_sector_offset) %
3825 DASD_RAW_SECTORS_PER_TRACK;
3826 basedev = block->base;
3827 if ((start_padding_sectors || end_padding_sectors) &&
3828 (rq_data_dir(req) == WRITE)) {
3829 DBF_DEV_EVENT(DBF_ERR, basedev,
3830 "raw write not track aligned (%lu,%lu) req %p",
3831 start_padding_sectors, end_padding_sectors, req);
3832 return ERR_PTR(-EINVAL);
3835 first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK;
3836 last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) /
3837 DASD_RAW_SECTORS_PER_TRACK;
3838 trkcount = last_trk - first_trk + 1;
3841 if (rq_data_dir(req) == READ)
3842 cmd = DASD_ECKD_CCW_READ_TRACK;
3843 else if (rq_data_dir(req) == WRITE)
3844 cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK;
3846 return ERR_PTR(-EINVAL);
3849 * Raw track based I/O needs IDAWs for each page,
3850 * and not just for 64 bit addresses.
3852 cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK;
3855 * struct PFX_eckd_data and struct LRE_eckd_data can have up to 2 bytes
3856 * of extended parameter. This is needed for write full track.
3858 base_priv = basedev->private;
3859 use_prefix = base_priv->features.feature[8] & 0x01;
3861 cplength = 1 + trkcount;
3862 size = sizeof(struct PFX_eckd_data) + 2;
3864 cplength = 2 + trkcount;
3865 size = sizeof(struct DE_eckd_data) +
3866 sizeof(struct LRE_eckd_data) + 2;
3868 size = ALIGN(size, 8);
3870 datasize = size + cidaw * sizeof(unsigned long);
3872 /* Allocate the ccw request. */
3873 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength,
3874 datasize, startdev, blk_mq_rq_to_pdu(req));
3882 prefix_LRE(ccw++, data, first_trk, last_trk, cmd, basedev,
3883 startdev, 1, first_offs + 1, trkcount, 0, 0);
3885 define_extent(ccw++, data, first_trk, last_trk, cmd, basedev, 0);
3886 ccw[-1].flags |= CCW_FLAG_CC;
3888 data += sizeof(struct DE_eckd_data);
3889 locate_record_ext(ccw++, data, first_trk, first_offs + 1,
3890 trkcount, cmd, basedev, 0, 0);
3893 idaws = (unsigned long *)(cqr->data + size);
3894 len_to_track_end = 0;
3895 if (start_padding_sectors) {
3896 ccw[-1].flags |= CCW_FLAG_CC;
3897 ccw->cmd_code = cmd;
3898 /* maximum 3390 track size */
3900 /* 64k map to one track */
3901 len_to_track_end = 65536 - start_padding_sectors * 512;
3902 ccw->cda = (__u32)(addr_t)idaws;
3903 ccw->flags |= CCW_FLAG_IDA;
3904 ccw->flags |= CCW_FLAG_SLI;
3906 for (sectors = 0; sectors < start_padding_sectors; sectors += 8)
3907 idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE);
3909 rq_for_each_segment(bv, req, iter) {
3910 dst = page_address(bv.bv_page) + bv.bv_offset;
3911 seg_len = bv.bv_len;
3912 if (cmd == DASD_ECKD_CCW_READ_TRACK)
3913 memset(dst, 0, seg_len);
3914 if (!len_to_track_end) {
3915 ccw[-1].flags |= CCW_FLAG_CC;
3916 ccw->cmd_code = cmd;
3917 /* maximum 3390 track size */
3919 /* 64k map to one track */
3920 len_to_track_end = 65536;
3921 ccw->cda = (__u32)(addr_t)idaws;
3922 ccw->flags |= CCW_FLAG_IDA;
3923 ccw->flags |= CCW_FLAG_SLI;
3926 len_to_track_end -= seg_len;
3927 idaws = idal_create_words(idaws, dst, seg_len);
3929 for (sectors = 0; sectors < end_padding_sectors; sectors += 8)
3930 idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE);
3931 if (blk_noretry_request(req) ||
3932 block->base->features & DASD_FEATURE_FAILFAST)
3933 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
3934 cqr->startdev = startdev;
3935 cqr->memdev = startdev;
3937 cqr->expires = startdev->default_expires * HZ;
3938 cqr->lpm = dasd_path_get_ppm(startdev);
3939 cqr->retries = startdev->default_retries;
3940 cqr->buildclk = get_tod_clock();
3941 cqr->status = DASD_CQR_FILLED;
3948 dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req)
3950 struct dasd_eckd_private *private;
3952 struct req_iterator iter;
3955 unsigned int blksize, blk_per_trk, off;
3959 if (!dasd_page_cache)
3961 private = cqr->block->base->private;
3962 blksize = cqr->block->bp_block;
3963 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
3964 recid = blk_rq_pos(req) >> cqr->block->s2b_shift;
3966 /* Skip over define extent & locate record. */
3968 if (private->uses_cdl == 0 || recid > 2*blk_per_trk)
3970 rq_for_each_segment(bv, req, iter) {
3971 dst = page_address(bv.bv_page) + bv.bv_offset;
3972 for (off = 0; off < bv.bv_len; off += blksize) {
3973 /* Skip locate record. */
3974 if (private->uses_cdl && recid <= 2*blk_per_trk)
3977 if (ccw->flags & CCW_FLAG_IDA)
3978 cda = *((char **)((addr_t) ccw->cda));
3980 cda = (char *)((addr_t) ccw->cda);
3982 if (rq_data_dir(req) == READ)
3983 memcpy(dst, cda, bv.bv_len);
3984 kmem_cache_free(dasd_page_cache,
3985 (void *)((addr_t)cda & PAGE_MASK));
3994 status = cqr->status == DASD_CQR_DONE;
3995 dasd_sfree_request(cqr, cqr->memdev);
4000 * Modify ccw/tcw in cqr so it can be started on a base device.
4002 * Note that this is not enough to restart the cqr!
4003 * Either reset cqr->startdev as well (summary unit check handling)
4004 * or restart via separate cqr (as in ERP handling).
4006 void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr)
4009 struct PFX_eckd_data *pfxdata;
4014 if (cqr->cpmode == 1) {
4016 tccb = tcw_get_tccb(tcw);
4017 dcw = (struct dcw *)&tccb->tca[0];
4018 pfxdata = (struct PFX_eckd_data *)&dcw->cd[0];
4019 pfxdata->validity.verify_base = 0;
4020 pfxdata->validity.hyper_pav = 0;
4023 pfxdata = cqr->data;
4024 if (ccw->cmd_code == DASD_ECKD_CCW_PFX) {
4025 pfxdata->validity.verify_base = 0;
4026 pfxdata->validity.hyper_pav = 0;
4031 #define DASD_ECKD_CHANQ_MAX_SIZE 4
4033 static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base,
4034 struct dasd_block *block,
4035 struct request *req)
4037 struct dasd_eckd_private *private;
4038 struct dasd_device *startdev;
4039 unsigned long flags;
4040 struct dasd_ccw_req *cqr;
4042 startdev = dasd_alias_get_start_dev(base);
4045 private = startdev->private;
4046 if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE)
4047 return ERR_PTR(-EBUSY);
4049 spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags);
4051 if ((base->features & DASD_FEATURE_USERAW))
4052 cqr = dasd_eckd_build_cp_raw(startdev, block, req);
4054 cqr = dasd_eckd_build_cp(startdev, block, req);
4057 spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags);
4061 static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr,
4062 struct request *req)
4064 struct dasd_eckd_private *private;
4065 unsigned long flags;
4067 spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags);
4068 private = cqr->memdev->private;
4070 spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags);
4071 return dasd_eckd_free_cp(cqr, req);
4075 dasd_eckd_fill_info(struct dasd_device * device,
4076 struct dasd_information2_t * info)
4078 struct dasd_eckd_private *private = device->private;
4080 info->label_block = 2;
4081 info->FBA_layout = private->uses_cdl ? 0 : 1;
4082 info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL;
4083 info->characteristics_size = sizeof(private->rdc_data);
4084 memcpy(info->characteristics, &private->rdc_data,
4085 sizeof(private->rdc_data));
4086 info->confdata_size = min((unsigned long)private->conf_len,
4087 sizeof(info->configuration_data));
4088 memcpy(info->configuration_data, private->conf_data,
4089 info->confdata_size);
4094 * SECTION: ioctl functions for eckd devices.
4098 * Release device ioctl.
4099 * Buils a channel programm to releases a prior reserved
4100 * (see dasd_eckd_reserve) device.
4103 dasd_eckd_release(struct dasd_device *device)
4105 struct dasd_ccw_req *cqr;
4110 if (!capable(CAP_SYS_ADMIN))
4114 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL);
4116 mutex_lock(&dasd_reserve_mutex);
4118 cqr = &dasd_reserve_req->cqr;
4119 memset(cqr, 0, sizeof(*cqr));
4120 memset(&dasd_reserve_req->ccw, 0,
4121 sizeof(dasd_reserve_req->ccw));
4122 cqr->cpaddr = &dasd_reserve_req->ccw;
4123 cqr->data = &dasd_reserve_req->data;
4124 cqr->magic = DASD_ECKD_MAGIC;
4127 ccw->cmd_code = DASD_ECKD_CCW_RELEASE;
4128 ccw->flags |= CCW_FLAG_SLI;
4130 ccw->cda = (__u32)(addr_t) cqr->data;
4131 cqr->startdev = device;
4132 cqr->memdev = device;
4133 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
4134 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
4135 cqr->retries = 2; /* set retry counter to enable basic ERP */
4136 cqr->expires = 2 * HZ;
4137 cqr->buildclk = get_tod_clock();
4138 cqr->status = DASD_CQR_FILLED;
4140 rc = dasd_sleep_on_immediatly(cqr);
4142 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags);
4145 mutex_unlock(&dasd_reserve_mutex);
4147 dasd_sfree_request(cqr, cqr->memdev);
4152 * Reserve device ioctl.
4153 * Options are set to 'synchronous wait for interrupt' and
4154 * 'timeout the request'. This leads to a terminate IO if
4155 * the interrupt is outstanding for a certain time.
4158 dasd_eckd_reserve(struct dasd_device *device)
4160 struct dasd_ccw_req *cqr;
4165 if (!capable(CAP_SYS_ADMIN))
4169 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL);
4171 mutex_lock(&dasd_reserve_mutex);
4173 cqr = &dasd_reserve_req->cqr;
4174 memset(cqr, 0, sizeof(*cqr));
4175 memset(&dasd_reserve_req->ccw, 0,
4176 sizeof(dasd_reserve_req->ccw));
4177 cqr->cpaddr = &dasd_reserve_req->ccw;
4178 cqr->data = &dasd_reserve_req->data;
4179 cqr->magic = DASD_ECKD_MAGIC;
4182 ccw->cmd_code = DASD_ECKD_CCW_RESERVE;
4183 ccw->flags |= CCW_FLAG_SLI;
4185 ccw->cda = (__u32)(addr_t) cqr->data;
4186 cqr->startdev = device;
4187 cqr->memdev = device;
4188 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
4189 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
4190 cqr->retries = 2; /* set retry counter to enable basic ERP */
4191 cqr->expires = 2 * HZ;
4192 cqr->buildclk = get_tod_clock();
4193 cqr->status = DASD_CQR_FILLED;
4195 rc = dasd_sleep_on_immediatly(cqr);
4197 set_bit(DASD_FLAG_IS_RESERVED, &device->flags);
4200 mutex_unlock(&dasd_reserve_mutex);
4202 dasd_sfree_request(cqr, cqr->memdev);
4207 * Steal lock ioctl - unconditional reserve device.
4208 * Buils a channel programm to break a device's reservation.
4209 * (unconditional reserve)
4212 dasd_eckd_steal_lock(struct dasd_device *device)
4214 struct dasd_ccw_req *cqr;
4219 if (!capable(CAP_SYS_ADMIN))
4223 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL);
4225 mutex_lock(&dasd_reserve_mutex);
4227 cqr = &dasd_reserve_req->cqr;
4228 memset(cqr, 0, sizeof(*cqr));
4229 memset(&dasd_reserve_req->ccw, 0,
4230 sizeof(dasd_reserve_req->ccw));
4231 cqr->cpaddr = &dasd_reserve_req->ccw;
4232 cqr->data = &dasd_reserve_req->data;
4233 cqr->magic = DASD_ECKD_MAGIC;
4236 ccw->cmd_code = DASD_ECKD_CCW_SLCK;
4237 ccw->flags |= CCW_FLAG_SLI;
4239 ccw->cda = (__u32)(addr_t) cqr->data;
4240 cqr->startdev = device;
4241 cqr->memdev = device;
4242 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
4243 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
4244 cqr->retries = 2; /* set retry counter to enable basic ERP */
4245 cqr->expires = 2 * HZ;
4246 cqr->buildclk = get_tod_clock();
4247 cqr->status = DASD_CQR_FILLED;
4249 rc = dasd_sleep_on_immediatly(cqr);
4251 set_bit(DASD_FLAG_IS_RESERVED, &device->flags);
4254 mutex_unlock(&dasd_reserve_mutex);
4256 dasd_sfree_request(cqr, cqr->memdev);
4261 * SNID - Sense Path Group ID
4262 * This ioctl may be used in situations where I/O is stalled due to
4263 * a reserve, so if the normal dasd_smalloc_request fails, we use the
4264 * preallocated dasd_reserve_req.
4266 static int dasd_eckd_snid(struct dasd_device *device,
4269 struct dasd_ccw_req *cqr;
4273 struct dasd_snid_ioctl_data usrparm;
4275 if (!capable(CAP_SYS_ADMIN))
4278 if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
4282 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1,
4283 sizeof(struct dasd_snid_data), device,
4286 mutex_lock(&dasd_reserve_mutex);
4288 cqr = &dasd_reserve_req->cqr;
4289 memset(cqr, 0, sizeof(*cqr));
4290 memset(&dasd_reserve_req->ccw, 0,
4291 sizeof(dasd_reserve_req->ccw));
4292 cqr->cpaddr = &dasd_reserve_req->ccw;
4293 cqr->data = &dasd_reserve_req->data;
4294 cqr->magic = DASD_ECKD_MAGIC;
4297 ccw->cmd_code = DASD_ECKD_CCW_SNID;
4298 ccw->flags |= CCW_FLAG_SLI;
4300 ccw->cda = (__u32)(addr_t) cqr->data;
4301 cqr->startdev = device;
4302 cqr->memdev = device;
4303 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
4304 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
4305 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags);
4307 cqr->expires = 10 * HZ;
4308 cqr->buildclk = get_tod_clock();
4309 cqr->status = DASD_CQR_FILLED;
4310 cqr->lpm = usrparm.path_mask;
4312 rc = dasd_sleep_on_immediatly(cqr);
4313 /* verify that I/O processing didn't modify the path mask */
4314 if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask))
4317 usrparm.data = *((struct dasd_snid_data *)cqr->data);
4318 if (copy_to_user(argp, &usrparm, sizeof(usrparm)))
4323 mutex_unlock(&dasd_reserve_mutex);
4325 dasd_sfree_request(cqr, cqr->memdev);
4330 * Read performance statistics
4333 dasd_eckd_performance(struct dasd_device *device, void __user *argp)
4335 struct dasd_psf_prssd_data *prssdp;
4336 struct dasd_rssd_perf_stats_t *stats;
4337 struct dasd_ccw_req *cqr;
4341 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
4342 (sizeof(struct dasd_psf_prssd_data) +
4343 sizeof(struct dasd_rssd_perf_stats_t)),
4346 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
4347 "Could not allocate initialization request");
4348 return PTR_ERR(cqr);
4350 cqr->startdev = device;
4351 cqr->memdev = device;
4353 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
4354 cqr->expires = 10 * HZ;
4356 /* Prepare for Read Subsystem Data */
4357 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
4358 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
4359 prssdp->order = PSF_ORDER_PRSSD;
4360 prssdp->suborder = 0x01; /* Performance Statistics */
4361 prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */
4364 ccw->cmd_code = DASD_ECKD_CCW_PSF;
4365 ccw->count = sizeof(struct dasd_psf_prssd_data);
4366 ccw->flags |= CCW_FLAG_CC;
4367 ccw->cda = (__u32)(addr_t) prssdp;
4369 /* Read Subsystem Data - Performance Statistics */
4370 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
4371 memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t));
4374 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
4375 ccw->count = sizeof(struct dasd_rssd_perf_stats_t);
4376 ccw->cda = (__u32)(addr_t) stats;
4378 cqr->buildclk = get_tod_clock();
4379 cqr->status = DASD_CQR_FILLED;
4380 rc = dasd_sleep_on(cqr);
4382 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
4383 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
4384 if (copy_to_user(argp, stats,
4385 sizeof(struct dasd_rssd_perf_stats_t)))
4388 dasd_sfree_request(cqr, cqr->memdev);
4393 * Get attributes (cache operations)
4394 * Returnes the cache attributes used in Define Extend (DE).
4397 dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp)
4399 struct dasd_eckd_private *private = device->private;
4400 struct attrib_data_t attrib = private->attrib;
4403 if (!capable(CAP_SYS_ADMIN))
4409 if (copy_to_user(argp, (long *) &attrib,
4410 sizeof(struct attrib_data_t)))
4417 * Set attributes (cache operations)
4418 * Stores the attributes for cache operation to be used in Define Extend (DE).
4421 dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp)
4423 struct dasd_eckd_private *private = device->private;
4424 struct attrib_data_t attrib;
4426 if (!capable(CAP_SYS_ADMIN))
4431 if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t)))
4433 private->attrib = attrib;
4435 dev_info(&device->cdev->dev,
4436 "The DASD cache mode was set to %x (%i cylinder prestage)\n",
4437 private->attrib.operation, private->attrib.nr_cyl);
4442 * Issue syscall I/O to EMC Symmetrix array.
4443 * CCWs are PSF and RSSD
4445 static int dasd_symm_io(struct dasd_device *device, void __user *argp)
4447 struct dasd_symmio_parms usrparm;
4448 char *psf_data, *rssd_result;
4449 struct dasd_ccw_req *cqr;
4454 if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
4458 /* Copy parms from caller */
4460 if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
4462 if (is_compat_task()) {
4463 /* Make sure pointers are sane even on 31 bit. */
4465 if ((usrparm.psf_data >> 32) != 0)
4467 if ((usrparm.rssd_result >> 32) != 0)
4469 usrparm.psf_data &= 0x7fffffffULL;
4470 usrparm.rssd_result &= 0x7fffffffULL;
4472 /* alloc I/O data area */
4473 psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA);
4474 rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA);
4475 if (!psf_data || !rssd_result) {
4480 /* get syscall header from user space */
4482 if (copy_from_user(psf_data,
4483 (void __user *)(unsigned long) usrparm.psf_data,
4484 usrparm.psf_data_len))
4489 /* setup CCWs for PSF + RSSD */
4490 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2, 0, device, NULL);
4492 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
4493 "Could not allocate initialization request");
4498 cqr->startdev = device;
4499 cqr->memdev = device;
4501 cqr->expires = 10 * HZ;
4502 cqr->buildclk = get_tod_clock();
4503 cqr->status = DASD_CQR_FILLED;
4505 /* Build the ccws */
4509 ccw->cmd_code = DASD_ECKD_CCW_PSF;
4510 ccw->count = usrparm.psf_data_len;
4511 ccw->flags |= CCW_FLAG_CC;
4512 ccw->cda = (__u32)(addr_t) psf_data;
4517 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
4518 ccw->count = usrparm.rssd_result_len;
4519 ccw->flags = CCW_FLAG_SLI ;
4520 ccw->cda = (__u32)(addr_t) rssd_result;
4522 rc = dasd_sleep_on(cqr);
4527 if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result,
4528 rssd_result, usrparm.rssd_result_len))
4533 dasd_sfree_request(cqr, cqr->memdev);
4538 DBF_DEV_EVENT(DBF_WARNING, device,
4539 "Symmetrix ioctl (0x%02x 0x%02x): rc=%d",
4540 (int) psf0, (int) psf1, rc);
4545 dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp)
4547 struct dasd_device *device = block->base;
4551 return dasd_eckd_get_attrib(device, argp);
4553 return dasd_eckd_set_attrib(device, argp);
4555 return dasd_eckd_performance(device, argp);
4557 return dasd_eckd_release(device);
4559 return dasd_eckd_reserve(device);
4561 return dasd_eckd_steal_lock(device);
4563 return dasd_eckd_snid(device, argp);
4565 return dasd_symm_io(device, argp);
4572 * Dump the range of CCWs into 'page' buffer
4573 * and return number of printed chars.
4576 dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page)
4582 while (from <= to) {
4583 len += sprintf(page + len, PRINTK_HEADER
4584 " CCW %p: %08X %08X DAT:",
4585 from, ((int *) from)[0], ((int *) from)[1]);
4587 /* get pointer to data (consider IDALs) */
4588 if (from->flags & CCW_FLAG_IDA)
4589 datap = (char *) *((addr_t *) (addr_t) from->cda);
4591 datap = (char *) ((addr_t) from->cda);
4593 /* dump data (max 32 bytes) */
4594 for (count = 0; count < from->count && count < 32; count++) {
4595 if (count % 8 == 0) len += sprintf(page + len, " ");
4596 if (count % 4 == 0) len += sprintf(page + len, " ");
4597 len += sprintf(page + len, "%02x", datap[count]);
4599 len += sprintf(page + len, "\n");
4606 dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb,
4612 sense = (u64 *) dasd_get_sense(irb);
4613 stat = (u64 *) &irb->scsw;
4615 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : "
4616 "%016llx %016llx %016llx %016llx",
4617 reason, *stat, *((u32 *) (stat + 1)),
4618 sense[0], sense[1], sense[2], sense[3]);
4620 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s",
4621 reason, *stat, *((u32 *) (stat + 1)),
4627 * Print sense data and related channel program.
4628 * Parts are printed because printk buffer is only 1024 bytes.
4630 static void dasd_eckd_dump_sense_ccw(struct dasd_device *device,
4631 struct dasd_ccw_req *req, struct irb *irb)
4634 struct ccw1 *first, *last, *fail, *from, *to;
4637 page = (char *) get_zeroed_page(GFP_ATOMIC);
4639 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
4640 "No memory to dump sense data\n");
4643 /* dump the sense data */
4644 len = sprintf(page, PRINTK_HEADER
4645 " I/O status report for device %s:\n",
4646 dev_name(&device->cdev->dev));
4647 len += sprintf(page + len, PRINTK_HEADER
4648 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X "
4650 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw),
4651 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw),
4652 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw),
4653 req ? req->intrc : 0);
4654 len += sprintf(page + len, PRINTK_HEADER
4655 " device %s: Failing CCW: %p\n",
4656 dev_name(&device->cdev->dev),
4657 (void *) (addr_t) irb->scsw.cmd.cpa);
4658 if (irb->esw.esw0.erw.cons) {
4659 for (sl = 0; sl < 4; sl++) {
4660 len += sprintf(page + len, PRINTK_HEADER
4661 " Sense(hex) %2d-%2d:",
4662 (8 * sl), ((8 * sl) + 7));
4664 for (sct = 0; sct < 8; sct++) {
4665 len += sprintf(page + len, " %02x",
4666 irb->ecw[8 * sl + sct]);
4668 len += sprintf(page + len, "\n");
4671 if (irb->ecw[27] & DASD_SENSE_BIT_0) {
4672 /* 24 Byte Sense Data */
4673 sprintf(page + len, PRINTK_HEADER
4674 " 24 Byte: %x MSG %x, "
4675 "%s MSGb to SYSOP\n",
4676 irb->ecw[7] >> 4, irb->ecw[7] & 0x0f,
4677 irb->ecw[1] & 0x10 ? "" : "no");
4679 /* 32 Byte Sense Data */
4680 sprintf(page + len, PRINTK_HEADER
4681 " 32 Byte: Format: %x "
4682 "Exception class %x\n",
4683 irb->ecw[6] & 0x0f, irb->ecw[22] >> 4);
4686 sprintf(page + len, PRINTK_HEADER
4687 " SORRY - NO VALID SENSE AVAILABLE\n");
4689 printk(KERN_ERR "%s", page);
4692 /* req == NULL for unsolicited interrupts */
4693 /* dump the Channel Program (max 140 Bytes per line) */
4694 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */
4695 first = req->cpaddr;
4696 for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++);
4697 to = min(first + 6, last);
4698 len = sprintf(page, PRINTK_HEADER
4699 " Related CP in req: %p\n", req);
4700 dasd_eckd_dump_ccw_range(first, to, page + len);
4701 printk(KERN_ERR "%s", page);
4703 /* print failing CCW area (maximum 4) */
4704 /* scsw->cda is either valid or zero */
4707 fail = (struct ccw1 *)(addr_t)
4708 irb->scsw.cmd.cpa; /* failing CCW */
4709 if (from < fail - 2) {
4710 from = fail - 2; /* there is a gap - print header */
4711 len += sprintf(page, PRINTK_HEADER "......\n");
4713 to = min(fail + 1, last);
4714 len += dasd_eckd_dump_ccw_range(from, to, page + len);
4716 /* print last CCWs (maximum 2) */
4717 from = max(from, ++to);
4718 if (from < last - 1) {
4719 from = last - 1; /* there is a gap - print header */
4720 len += sprintf(page + len, PRINTK_HEADER "......\n");
4722 len += dasd_eckd_dump_ccw_range(from, last, page + len);
4724 printk(KERN_ERR "%s", page);
4726 free_page((unsigned long) page);
4731 * Print sense data from a tcw.
4733 static void dasd_eckd_dump_sense_tcw(struct dasd_device *device,
4734 struct dasd_ccw_req *req, struct irb *irb)
4737 int len, sl, sct, residual;
4741 page = (char *) get_zeroed_page(GFP_ATOMIC);
4743 DBF_DEV_EVENT(DBF_WARNING, device, " %s",
4744 "No memory to dump sense data");
4747 /* dump the sense data */
4748 len = sprintf(page, PRINTK_HEADER
4749 " I/O status report for device %s:\n",
4750 dev_name(&device->cdev->dev));
4751 len += sprintf(page + len, PRINTK_HEADER
4752 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X "
4753 "CS:%02X fcxs:%02X schxs:%02X RC:%d\n",
4754 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw),
4755 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw),
4756 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw),
4758 (irb->scsw.tm.ifob << 7) | irb->scsw.tm.sesq,
4759 req ? req->intrc : 0);
4760 len += sprintf(page + len, PRINTK_HEADER
4761 " device %s: Failing TCW: %p\n",
4762 dev_name(&device->cdev->dev),
4763 (void *) (addr_t) irb->scsw.tm.tcw);
4767 if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01))
4769 (struct tcw *)(unsigned long)irb->scsw.tm.tcw);
4772 len += sprintf(page + len, PRINTK_HEADER
4773 " tsb->length %d\n", tsb->length);
4774 len += sprintf(page + len, PRINTK_HEADER
4775 " tsb->flags %x\n", tsb->flags);
4776 len += sprintf(page + len, PRINTK_HEADER
4777 " tsb->dcw_offset %d\n", tsb->dcw_offset);
4778 len += sprintf(page + len, PRINTK_HEADER
4779 " tsb->count %d\n", tsb->count);
4780 residual = tsb->count - 28;
4781 len += sprintf(page + len, PRINTK_HEADER
4782 " residual %d\n", residual);
4784 switch (tsb->flags & 0x07) {
4785 case 1: /* tsa_iostat */
4786 len += sprintf(page + len, PRINTK_HEADER
4787 " tsb->tsa.iostat.dev_time %d\n",
4788 tsb->tsa.iostat.dev_time);
4789 len += sprintf(page + len, PRINTK_HEADER
4790 " tsb->tsa.iostat.def_time %d\n",
4791 tsb->tsa.iostat.def_time);
4792 len += sprintf(page + len, PRINTK_HEADER
4793 " tsb->tsa.iostat.queue_time %d\n",
4794 tsb->tsa.iostat.queue_time);
4795 len += sprintf(page + len, PRINTK_HEADER
4796 " tsb->tsa.iostat.dev_busy_time %d\n",
4797 tsb->tsa.iostat.dev_busy_time);
4798 len += sprintf(page + len, PRINTK_HEADER
4799 " tsb->tsa.iostat.dev_act_time %d\n",
4800 tsb->tsa.iostat.dev_act_time);
4801 sense = tsb->tsa.iostat.sense;
4803 case 2: /* ts_ddpc */
4804 len += sprintf(page + len, PRINTK_HEADER
4805 " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc);
4806 for (sl = 0; sl < 2; sl++) {
4807 len += sprintf(page + len, PRINTK_HEADER
4808 " tsb->tsa.ddpc.rcq %2d-%2d: ",
4809 (8 * sl), ((8 * sl) + 7));
4810 rcq = tsb->tsa.ddpc.rcq;
4811 for (sct = 0; sct < 8; sct++) {
4812 len += sprintf(page + len, " %02x",
4815 len += sprintf(page + len, "\n");
4817 sense = tsb->tsa.ddpc.sense;
4819 case 3: /* tsa_intrg */
4820 len += sprintf(page + len, PRINTK_HEADER
4821 " tsb->tsa.intrg.: not supported yet\n");
4826 for (sl = 0; sl < 4; sl++) {
4827 len += sprintf(page + len, PRINTK_HEADER
4828 " Sense(hex) %2d-%2d:",
4829 (8 * sl), ((8 * sl) + 7));
4830 for (sct = 0; sct < 8; sct++) {
4831 len += sprintf(page + len, " %02x",
4832 sense[8 * sl + sct]);
4834 len += sprintf(page + len, "\n");
4837 if (sense[27] & DASD_SENSE_BIT_0) {
4838 /* 24 Byte Sense Data */
4839 sprintf(page + len, PRINTK_HEADER
4840 " 24 Byte: %x MSG %x, "
4841 "%s MSGb to SYSOP\n",
4842 sense[7] >> 4, sense[7] & 0x0f,
4843 sense[1] & 0x10 ? "" : "no");
4845 /* 32 Byte Sense Data */
4846 sprintf(page + len, PRINTK_HEADER
4847 " 32 Byte: Format: %x "
4848 "Exception class %x\n",
4849 sense[6] & 0x0f, sense[22] >> 4);
4852 sprintf(page + len, PRINTK_HEADER
4853 " SORRY - NO VALID SENSE AVAILABLE\n");
4856 sprintf(page + len, PRINTK_HEADER
4857 " SORRY - NO TSB DATA AVAILABLE\n");
4859 printk(KERN_ERR "%s", page);
4860 free_page((unsigned long) page);
4863 static void dasd_eckd_dump_sense(struct dasd_device *device,
4864 struct dasd_ccw_req *req, struct irb *irb)
4866 u8 *sense = dasd_get_sense(irb);
4868 if (scsw_is_tm(&irb->scsw)) {
4870 * In some cases the 'File Protected' or 'Incorrect Length'
4871 * error might be expected and log messages shouldn't be written
4872 * then. Check if the according suppress bit is set.
4874 if (sense && (sense[1] & SNS1_FILE_PROTECTED) &&
4875 test_bit(DASD_CQR_SUPPRESS_FP, &req->flags))
4877 if (scsw_cstat(&irb->scsw) == 0x40 &&
4878 test_bit(DASD_CQR_SUPPRESS_IL, &req->flags))
4881 dasd_eckd_dump_sense_tcw(device, req, irb);
4884 * In some cases the 'Command Reject' or 'No Record Found'
4885 * error might be expected and log messages shouldn't be
4886 * written then. Check if the according suppress bit is set.
4888 if (sense && sense[0] & SNS0_CMD_REJECT &&
4889 test_bit(DASD_CQR_SUPPRESS_CR, &req->flags))
4892 if (sense && sense[1] & SNS1_NO_REC_FOUND &&
4893 test_bit(DASD_CQR_SUPPRESS_NRF, &req->flags))
4896 dasd_eckd_dump_sense_ccw(device, req, irb);
4900 static int dasd_eckd_pm_freeze(struct dasd_device *device)
4903 * the device should be disconnected from our LCU structure
4904 * on restore we will reconnect it and reread LCU specific
4905 * information like PAV support that might have changed
4907 dasd_alias_remove_device(device);
4908 dasd_alias_disconnect_device_from_lcu(device);
4913 static int dasd_eckd_restore_device(struct dasd_device *device)
4915 struct dasd_eckd_private *private = device->private;
4916 struct dasd_eckd_characteristics temp_rdc_data;
4918 struct dasd_uid temp_uid;
4919 unsigned long flags;
4920 unsigned long cqr_flags = 0;
4922 /* Read Configuration Data */
4923 rc = dasd_eckd_read_conf(device);
4925 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
4926 "Read configuration data failed, rc=%d", rc);
4930 dasd_eckd_get_uid(device, &temp_uid);
4931 /* Generate device unique id */
4932 rc = dasd_eckd_generate_uid(device);
4933 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
4934 if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0)
4935 dev_err(&device->cdev->dev, "The UID of the DASD has "
4937 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
4941 /* register lcu with alias handling, enable PAV if this is a new lcu */
4942 rc = dasd_alias_make_device_known_to_lcu(device);
4946 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags);
4947 dasd_eckd_validate_server(device, cqr_flags);
4949 /* RE-Read Configuration Data */
4950 rc = dasd_eckd_read_conf(device);
4952 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
4953 "Read configuration data failed, rc=%d", rc);
4957 /* Read Feature Codes */
4958 dasd_eckd_read_features(device);
4960 /* Read Device Characteristics */
4961 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
4962 &temp_rdc_data, 64);
4964 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
4965 "Read device characteristic failed, rc=%d", rc);
4968 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
4969 memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data));
4970 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
4972 /* add device to alias management */
4973 dasd_alias_add_device(device);
4978 dasd_alias_disconnect_device_from_lcu(device);
4983 static int dasd_eckd_reload_device(struct dasd_device *device)
4985 struct dasd_eckd_private *private = device->private;
4988 struct dasd_uid uid;
4989 unsigned long flags;
4992 * remove device from alias handling to prevent new requests
4993 * from being scheduled on the wrong alias device
4995 dasd_alias_remove_device(device);
4997 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
4998 old_base = private->uid.base_unit_addr;
4999 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
5001 /* Read Configuration Data */
5002 rc = dasd_eckd_read_conf(device);
5006 rc = dasd_eckd_generate_uid(device);
5010 * update unit address configuration and
5011 * add device to alias management
5013 dasd_alias_update_add_device(device);
5015 dasd_eckd_get_uid(device, &uid);
5017 if (old_base != uid.base_unit_addr) {
5018 if (strlen(uid.vduit) > 0)
5019 snprintf(print_uid, sizeof(print_uid),
5020 "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial,
5021 uid.ssid, uid.base_unit_addr, uid.vduit);
5023 snprintf(print_uid, sizeof(print_uid),
5024 "%s.%s.%04x.%02x", uid.vendor, uid.serial,
5025 uid.ssid, uid.base_unit_addr);
5027 dev_info(&device->cdev->dev,
5028 "An Alias device was reassigned to a new base device "
5029 "with UID: %s\n", print_uid);
5037 static int dasd_eckd_read_message_buffer(struct dasd_device *device,
5038 struct dasd_rssd_messages *messages,
5041 struct dasd_rssd_messages *message_buf;
5042 struct dasd_psf_prssd_data *prssdp;
5043 struct dasd_ccw_req *cqr;
5047 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
5048 (sizeof(struct dasd_psf_prssd_data) +
5049 sizeof(struct dasd_rssd_messages)),
5052 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
5053 "Could not allocate read message buffer request");
5054 return PTR_ERR(cqr);
5059 cqr->startdev = device;
5060 cqr->memdev = device;
5062 cqr->expires = 10 * HZ;
5063 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags);
5064 /* dasd_sleep_on_immediatly does not do complex error
5065 * recovery so clear erp flag and set retry counter to
5067 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
5070 /* Prepare for Read Subsystem Data */
5071 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
5072 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
5073 prssdp->order = PSF_ORDER_PRSSD;
5074 prssdp->suborder = 0x03; /* Message Buffer */
5075 /* all other bytes of prssdp must be zero */
5078 ccw->cmd_code = DASD_ECKD_CCW_PSF;
5079 ccw->count = sizeof(struct dasd_psf_prssd_data);
5080 ccw->flags |= CCW_FLAG_CC;
5081 ccw->flags |= CCW_FLAG_SLI;
5082 ccw->cda = (__u32)(addr_t) prssdp;
5084 /* Read Subsystem Data - message buffer */
5085 message_buf = (struct dasd_rssd_messages *) (prssdp + 1);
5086 memset(message_buf, 0, sizeof(struct dasd_rssd_messages));
5089 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
5090 ccw->count = sizeof(struct dasd_rssd_messages);
5091 ccw->flags |= CCW_FLAG_SLI;
5092 ccw->cda = (__u32)(addr_t) message_buf;
5094 cqr->buildclk = get_tod_clock();
5095 cqr->status = DASD_CQR_FILLED;
5096 rc = dasd_sleep_on_immediatly(cqr);
5098 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
5099 message_buf = (struct dasd_rssd_messages *)
5101 memcpy(messages, message_buf,
5102 sizeof(struct dasd_rssd_messages));
5103 } else if (cqr->lpm) {
5105 * on z/VM we might not be able to do I/O on the requested path
5106 * but instead we get the required information on any path
5107 * so retry with open path mask
5112 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
5113 "Reading messages failed with rc=%d\n"
5115 dasd_sfree_request(cqr, cqr->memdev);
5119 static int dasd_eckd_query_host_access(struct dasd_device *device,
5120 struct dasd_psf_query_host_access *data)
5122 struct dasd_eckd_private *private = device->private;
5123 struct dasd_psf_query_host_access *host_access;
5124 struct dasd_psf_prssd_data *prssdp;
5125 struct dasd_ccw_req *cqr;
5129 /* not available for HYPER PAV alias devices */
5130 if (!device->block && private->lcu->pav == HYPER_PAV)
5133 /* may not be supported by the storage server */
5134 if (!(private->features.feature[14] & 0x80))
5137 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
5138 sizeof(struct dasd_psf_prssd_data) + 1,
5141 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
5142 "Could not allocate read message buffer request");
5143 return PTR_ERR(cqr);
5145 host_access = kzalloc(sizeof(*host_access), GFP_KERNEL | GFP_DMA);
5147 dasd_sfree_request(cqr, device);
5148 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
5149 "Could not allocate host_access buffer");
5152 cqr->startdev = device;
5153 cqr->memdev = device;
5156 cqr->expires = 10 * HZ;
5158 /* Prepare for Read Subsystem Data */
5159 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
5160 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
5161 prssdp->order = PSF_ORDER_PRSSD;
5162 prssdp->suborder = PSF_SUBORDER_QHA; /* query host access */
5163 /* LSS and Volume that will be queried */
5164 prssdp->lss = private->ned->ID;
5165 prssdp->volume = private->ned->unit_addr;
5166 /* all other bytes of prssdp must be zero */
5169 ccw->cmd_code = DASD_ECKD_CCW_PSF;
5170 ccw->count = sizeof(struct dasd_psf_prssd_data);
5171 ccw->flags |= CCW_FLAG_CC;
5172 ccw->flags |= CCW_FLAG_SLI;
5173 ccw->cda = (__u32)(addr_t) prssdp;
5175 /* Read Subsystem Data - query host access */
5177 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
5178 ccw->count = sizeof(struct dasd_psf_query_host_access);
5179 ccw->flags |= CCW_FLAG_SLI;
5180 ccw->cda = (__u32)(addr_t) host_access;
5182 cqr->buildclk = get_tod_clock();
5183 cqr->status = DASD_CQR_FILLED;
5184 /* the command might not be supported, suppress error message */
5185 __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags);
5186 rc = dasd_sleep_on_interruptible(cqr);
5188 *data = *host_access;
5190 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
5191 "Reading host access data failed with rc=%d\n",
5196 dasd_sfree_request(cqr, cqr->memdev);
5201 * return number of grouped devices
5203 static int dasd_eckd_host_access_count(struct dasd_device *device)
5205 struct dasd_psf_query_host_access *access;
5206 struct dasd_ckd_path_group_entry *entry;
5207 struct dasd_ckd_host_information *info;
5211 access = kzalloc(sizeof(*access), GFP_NOIO);
5213 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
5214 "Could not allocate access buffer");
5217 rc = dasd_eckd_query_host_access(device, access);
5223 info = (struct dasd_ckd_host_information *)
5224 access->host_access_information;
5225 for (i = 0; i < info->entry_count; i++) {
5226 entry = (struct dasd_ckd_path_group_entry *)
5227 (info->entry + i * info->entry_size);
5228 if (entry->status_flags & DASD_ECKD_PG_GROUPED)
5237 * write host access information to a sequential file
5239 static int dasd_hosts_print(struct dasd_device *device, struct seq_file *m)
5241 struct dasd_psf_query_host_access *access;
5242 struct dasd_ckd_path_group_entry *entry;
5243 struct dasd_ckd_host_information *info;
5244 char sysplex[9] = "";
5247 access = kzalloc(sizeof(*access), GFP_NOIO);
5249 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
5250 "Could not allocate access buffer");
5253 rc = dasd_eckd_query_host_access(device, access);
5259 info = (struct dasd_ckd_host_information *)
5260 access->host_access_information;
5261 for (i = 0; i < info->entry_count; i++) {
5262 entry = (struct dasd_ckd_path_group_entry *)
5263 (info->entry + i * info->entry_size);
5265 seq_printf(m, "pgid %*phN\n", 11, entry->pgid);
5267 seq_printf(m, "status_flags %02x\n", entry->status_flags);
5269 memcpy(&sysplex, &entry->sysplex_name, sizeof(sysplex) - 1);
5270 EBCASC(sysplex, sizeof(sysplex));
5271 seq_printf(m, "sysplex_name %8s\n", sysplex);
5272 /* SUPPORTED CYLINDER */
5273 seq_printf(m, "supported_cylinder %d\n", entry->cylinder);
5275 seq_printf(m, "timestamp %lu\n", (unsigned long)
5284 * Perform Subsystem Function - CUIR response
5287 dasd_eckd_psf_cuir_response(struct dasd_device *device, int response,
5288 __u32 message_id, __u8 lpum)
5290 struct dasd_psf_cuir_response *psf_cuir;
5291 int pos = pathmask_to_pos(lpum);
5292 struct dasd_ccw_req *cqr;
5296 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ ,
5297 sizeof(struct dasd_psf_cuir_response),
5301 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
5302 "Could not allocate PSF-CUIR request");
5303 return PTR_ERR(cqr);
5306 psf_cuir = (struct dasd_psf_cuir_response *)cqr->data;
5307 psf_cuir->order = PSF_ORDER_CUIR_RESPONSE;
5308 psf_cuir->cc = response;
5309 psf_cuir->chpid = device->path[pos].chpid;
5310 psf_cuir->message_id = message_id;
5311 psf_cuir->cssid = device->path[pos].cssid;
5312 psf_cuir->ssid = device->path[pos].ssid;
5314 ccw->cmd_code = DASD_ECKD_CCW_PSF;
5315 ccw->cda = (__u32)(addr_t)psf_cuir;
5316 ccw->flags = CCW_FLAG_SLI;
5317 ccw->count = sizeof(struct dasd_psf_cuir_response);
5319 cqr->startdev = device;
5320 cqr->memdev = device;
5323 cqr->expires = 10*HZ;
5324 cqr->buildclk = get_tod_clock();
5325 cqr->status = DASD_CQR_FILLED;
5326 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags);
5328 rc = dasd_sleep_on(cqr);
5330 dasd_sfree_request(cqr, cqr->memdev);
5335 * return configuration data that is referenced by record selector
5336 * if a record selector is specified or per default return the
5337 * conf_data pointer for the path specified by lpum
5339 static struct dasd_conf_data *dasd_eckd_get_ref_conf(struct dasd_device *device,
5341 struct dasd_cuir_message *cuir)
5343 struct dasd_conf_data *conf_data;
5346 if (cuir->record_selector == 0)
5348 for (path = 0x80, pos = 0; path; path >>= 1, pos++) {
5349 conf_data = device->path[pos].conf_data;
5350 if (conf_data->gneq.record_selector ==
5351 cuir->record_selector)
5355 return device->path[pathmask_to_pos(lpum)].conf_data;
5359 * This function determines the scope of a reconfiguration request by
5360 * analysing the path and device selection data provided in the CUIR request.
5361 * Returns a path mask containing CUIR affected paths for the give device.
5363 * If the CUIR request does not contain the required information return the
5364 * path mask of the path the attention message for the CUIR request was reveived
5367 static int dasd_eckd_cuir_scope(struct dasd_device *device, __u8 lpum,
5368 struct dasd_cuir_message *cuir)
5370 struct dasd_conf_data *ref_conf_data;
5371 unsigned long bitmask = 0, mask = 0;
5372 struct dasd_conf_data *conf_data;
5373 unsigned int pos, path;
5374 char *ref_gneq, *gneq;
5375 char *ref_ned, *ned;
5378 /* if CUIR request does not specify the scope use the path
5379 the attention message was presented on */
5380 if (!cuir->ned_map ||
5381 !(cuir->neq_map[0] | cuir->neq_map[1] | cuir->neq_map[2]))
5384 /* get reference conf data */
5385 ref_conf_data = dasd_eckd_get_ref_conf(device, lpum, cuir);
5386 /* reference ned is determined by ned_map field */
5387 pos = 8 - ffs(cuir->ned_map);
5388 ref_ned = (char *)&ref_conf_data->neds[pos];
5389 ref_gneq = (char *)&ref_conf_data->gneq;
5390 /* transfer 24 bit neq_map to mask */
5391 mask = cuir->neq_map[2];
5392 mask |= cuir->neq_map[1] << 8;
5393 mask |= cuir->neq_map[0] << 16;
5395 for (path = 0; path < 8; path++) {
5396 /* initialise data per path */
5398 conf_data = device->path[path].conf_data;
5399 pos = 8 - ffs(cuir->ned_map);
5400 ned = (char *) &conf_data->neds[pos];
5401 /* compare reference ned and per path ned */
5402 if (memcmp(ref_ned, ned, sizeof(*ned)) != 0)
5404 gneq = (char *)&conf_data->gneq;
5405 /* compare reference gneq and per_path gneq under
5406 24 bit mask where mask bit 0 equals byte 7 of
5407 the gneq and mask bit 24 equals byte 31 */
5409 pos = ffs(bitmask) - 1;
5410 if (memcmp(&ref_gneq[31 - pos], &gneq[31 - pos], 1)
5413 clear_bit(pos, &bitmask);
5417 /* device and path match the reference values
5418 add path to CUIR scope */
5419 tbcpm |= 0x80 >> path;
5424 static void dasd_eckd_cuir_notify_user(struct dasd_device *device,
5425 unsigned long paths, int action)
5430 /* get position of bit in mask */
5431 pos = 8 - ffs(paths);
5432 /* get channel path descriptor from this position */
5433 if (action == CUIR_QUIESCE)
5434 pr_warn("Service on the storage server caused path %x.%02x to go offline",
5435 device->path[pos].cssid,
5436 device->path[pos].chpid);
5437 else if (action == CUIR_RESUME)
5438 pr_info("Path %x.%02x is back online after service on the storage server",
5439 device->path[pos].cssid,
5440 device->path[pos].chpid);
5441 clear_bit(7 - pos, &paths);
5445 static int dasd_eckd_cuir_remove_path(struct dasd_device *device, __u8 lpum,
5446 struct dasd_cuir_message *cuir)
5448 unsigned long tbcpm;
5450 tbcpm = dasd_eckd_cuir_scope(device, lpum, cuir);
5451 /* nothing to do if path is not in use */
5452 if (!(dasd_path_get_opm(device) & tbcpm))
5454 if (!(dasd_path_get_opm(device) & ~tbcpm)) {
5455 /* no path would be left if the CUIR action is taken
5459 /* remove device from operational path mask */
5460 dasd_path_remove_opm(device, tbcpm);
5461 dasd_path_add_cuirpm(device, tbcpm);
5466 * walk through all devices and build a path mask to quiesce them
5467 * return an error if the last path to a device would be removed
5469 * if only part of the devices are quiesced and an error
5470 * occurs no onlining necessary, the storage server will
5471 * notify the already set offline devices again
5473 static int dasd_eckd_cuir_quiesce(struct dasd_device *device, __u8 lpum,
5474 struct dasd_cuir_message *cuir)
5476 struct dasd_eckd_private *private = device->private;
5477 struct alias_pav_group *pavgroup, *tempgroup;
5478 struct dasd_device *dev, *n;
5479 unsigned long paths = 0;
5480 unsigned long flags;
5483 /* active devices */
5484 list_for_each_entry_safe(dev, n, &private->lcu->active_devices,
5486 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
5487 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
5488 spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags);
5493 /* inactive devices */
5494 list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices,
5496 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
5497 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
5498 spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags);
5503 /* devices in PAV groups */
5504 list_for_each_entry_safe(pavgroup, tempgroup,
5505 &private->lcu->grouplist, group) {
5506 list_for_each_entry_safe(dev, n, &pavgroup->baselist,
5508 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
5509 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
5510 spin_unlock_irqrestore(
5511 get_ccwdev_lock(dev->cdev), flags);
5516 list_for_each_entry_safe(dev, n, &pavgroup->aliaslist,
5518 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
5519 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
5520 spin_unlock_irqrestore(
5521 get_ccwdev_lock(dev->cdev), flags);
5527 /* notify user about all paths affected by CUIR action */
5528 dasd_eckd_cuir_notify_user(device, paths, CUIR_QUIESCE);
5534 static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum,
5535 struct dasd_cuir_message *cuir)
5537 struct dasd_eckd_private *private = device->private;
5538 struct alias_pav_group *pavgroup, *tempgroup;
5539 struct dasd_device *dev, *n;
5540 unsigned long paths = 0;
5544 * the path may have been added through a generic path event before
5545 * only trigger path verification if the path is not already in use
5547 list_for_each_entry_safe(dev, n,
5548 &private->lcu->active_devices,
5550 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
5552 if (!(dasd_path_get_opm(dev) & tbcpm)) {
5553 dasd_path_add_tbvpm(dev, tbcpm);
5554 dasd_schedule_device_bh(dev);
5557 list_for_each_entry_safe(dev, n,
5558 &private->lcu->inactive_devices,
5560 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
5562 if (!(dasd_path_get_opm(dev) & tbcpm)) {
5563 dasd_path_add_tbvpm(dev, tbcpm);
5564 dasd_schedule_device_bh(dev);
5567 /* devices in PAV groups */
5568 list_for_each_entry_safe(pavgroup, tempgroup,
5569 &private->lcu->grouplist,
5571 list_for_each_entry_safe(dev, n,
5572 &pavgroup->baselist,
5574 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
5576 if (!(dasd_path_get_opm(dev) & tbcpm)) {
5577 dasd_path_add_tbvpm(dev, tbcpm);
5578 dasd_schedule_device_bh(dev);
5581 list_for_each_entry_safe(dev, n,
5582 &pavgroup->aliaslist,
5584 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
5586 if (!(dasd_path_get_opm(dev) & tbcpm)) {
5587 dasd_path_add_tbvpm(dev, tbcpm);
5588 dasd_schedule_device_bh(dev);
5592 /* notify user about all paths affected by CUIR action */
5593 dasd_eckd_cuir_notify_user(device, paths, CUIR_RESUME);
5597 static void dasd_eckd_handle_cuir(struct dasd_device *device, void *messages,
5600 struct dasd_cuir_message *cuir = messages;
5603 DBF_DEV_EVENT(DBF_WARNING, device,
5604 "CUIR request: %016llx %016llx %016llx %08x",
5605 ((u64 *)cuir)[0], ((u64 *)cuir)[1], ((u64 *)cuir)[2],
5608 if (cuir->code == CUIR_QUIESCE) {
5610 if (dasd_eckd_cuir_quiesce(device, lpum, cuir))
5611 response = PSF_CUIR_LAST_PATH;
5613 response = PSF_CUIR_COMPLETED;
5614 } else if (cuir->code == CUIR_RESUME) {
5616 dasd_eckd_cuir_resume(device, lpum, cuir);
5617 response = PSF_CUIR_COMPLETED;
5619 response = PSF_CUIR_NOT_SUPPORTED;
5621 dasd_eckd_psf_cuir_response(device, response,
5622 cuir->message_id, lpum);
5623 DBF_DEV_EVENT(DBF_WARNING, device,
5624 "CUIR response: %d on message ID %08x", response,
5626 /* to make sure there is no attention left schedule work again */
5627 device->discipline->check_attention(device, lpum);
5630 static void dasd_eckd_check_attention_work(struct work_struct *work)
5632 struct check_attention_work_data *data;
5633 struct dasd_rssd_messages *messages;
5634 struct dasd_device *device;
5637 data = container_of(work, struct check_attention_work_data, worker);
5638 device = data->device;
5639 messages = kzalloc(sizeof(*messages), GFP_KERNEL);
5641 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
5642 "Could not allocate attention message buffer");
5645 rc = dasd_eckd_read_message_buffer(device, messages, data->lpum);
5648 if (messages->length == ATTENTION_LENGTH_CUIR &&
5649 messages->format == ATTENTION_FORMAT_CUIR)
5650 dasd_eckd_handle_cuir(device, messages, data->lpum);
5652 dasd_put_device(device);
5657 static int dasd_eckd_check_attention(struct dasd_device *device, __u8 lpum)
5659 struct check_attention_work_data *data;
5661 data = kzalloc(sizeof(*data), GFP_ATOMIC);
5664 INIT_WORK(&data->worker, dasd_eckd_check_attention_work);
5665 dasd_get_device(device);
5666 data->device = device;
5668 schedule_work(&data->worker);
5672 static int dasd_eckd_disable_hpf_path(struct dasd_device *device, __u8 lpum)
5674 if (~lpum & dasd_path_get_opm(device)) {
5675 dasd_path_add_nohpfpm(device, lpum);
5676 dasd_path_remove_opm(device, lpum);
5677 dev_err(&device->cdev->dev,
5678 "Channel path %02X lost HPF functionality and is disabled\n",
5685 static void dasd_eckd_disable_hpf_device(struct dasd_device *device)
5687 struct dasd_eckd_private *private = device->private;
5689 dev_err(&device->cdev->dev,
5690 "High Performance FICON disabled\n");
5691 private->fcx_max_data = 0;
5694 static int dasd_eckd_hpf_enabled(struct dasd_device *device)
5696 struct dasd_eckd_private *private = device->private;
5698 return private->fcx_max_data ? 1 : 0;
5701 static void dasd_eckd_handle_hpf_error(struct dasd_device *device,
5704 struct dasd_eckd_private *private = device->private;
5706 if (!private->fcx_max_data) {
5707 /* sanity check for no HPF, the error makes no sense */
5708 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
5709 "Trying to disable HPF for a non HPF device");
5712 if (irb->scsw.tm.sesq == SCSW_SESQ_DEV_NOFCX) {
5713 dasd_eckd_disable_hpf_device(device);
5714 } else if (irb->scsw.tm.sesq == SCSW_SESQ_PATH_NOFCX) {
5715 if (dasd_eckd_disable_hpf_path(device, irb->esw.esw1.lpum))
5717 dasd_eckd_disable_hpf_device(device);
5718 dasd_path_set_tbvpm(device,
5719 dasd_path_get_hpfpm(device));
5722 * prevent that any new I/O ist started on the device and schedule a
5723 * requeue of existing requests
5725 dasd_device_set_stop_bits(device, DASD_STOPPED_NOT_ACC);
5726 dasd_schedule_requeue(device);
5729 static struct ccw_driver dasd_eckd_driver = {
5731 .name = "dasd-eckd",
5732 .owner = THIS_MODULE,
5734 .ids = dasd_eckd_ids,
5735 .probe = dasd_eckd_probe,
5736 .remove = dasd_generic_remove,
5737 .set_offline = dasd_generic_set_offline,
5738 .set_online = dasd_eckd_set_online,
5739 .notify = dasd_generic_notify,
5740 .path_event = dasd_generic_path_event,
5741 .shutdown = dasd_generic_shutdown,
5742 .freeze = dasd_generic_pm_freeze,
5743 .thaw = dasd_generic_restore_device,
5744 .restore = dasd_generic_restore_device,
5745 .uc_handler = dasd_generic_uc_handler,
5746 .int_class = IRQIO_DAS,
5750 * max_blocks is dependent on the amount of storage that is available
5751 * in the static io buffer for each device. Currently each device has
5752 * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has
5753 * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use
5754 * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In
5755 * addition we have one define extent ccw + 16 bytes of data and one
5756 * locate record ccw + 16 bytes of data. That makes:
5757 * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum.
5758 * We want to fit two into the available memory so that we can immediately
5759 * start the next request if one finishes off. That makes 249.5 blocks
5760 * for one request. Give a little safety and the result is 240.
5762 static struct dasd_discipline dasd_eckd_discipline = {
5763 .owner = THIS_MODULE,
5767 .check_device = dasd_eckd_check_characteristics,
5768 .uncheck_device = dasd_eckd_uncheck_device,
5769 .do_analysis = dasd_eckd_do_analysis,
5770 .verify_path = dasd_eckd_verify_path,
5771 .basic_to_ready = dasd_eckd_basic_to_ready,
5772 .online_to_ready = dasd_eckd_online_to_ready,
5773 .basic_to_known = dasd_eckd_basic_to_known,
5774 .fill_geometry = dasd_eckd_fill_geometry,
5775 .start_IO = dasd_start_IO,
5776 .term_IO = dasd_term_IO,
5777 .handle_terminated_request = dasd_eckd_handle_terminated_request,
5778 .format_device = dasd_eckd_format_device,
5779 .check_device_format = dasd_eckd_check_device_format,
5780 .erp_action = dasd_eckd_erp_action,
5781 .erp_postaction = dasd_eckd_erp_postaction,
5782 .check_for_device_change = dasd_eckd_check_for_device_change,
5783 .build_cp = dasd_eckd_build_alias_cp,
5784 .free_cp = dasd_eckd_free_alias_cp,
5785 .dump_sense = dasd_eckd_dump_sense,
5786 .dump_sense_dbf = dasd_eckd_dump_sense_dbf,
5787 .fill_info = dasd_eckd_fill_info,
5788 .ioctl = dasd_eckd_ioctl,
5789 .freeze = dasd_eckd_pm_freeze,
5790 .restore = dasd_eckd_restore_device,
5791 .reload = dasd_eckd_reload_device,
5792 .get_uid = dasd_eckd_get_uid,
5793 .kick_validate = dasd_eckd_kick_validate_server,
5794 .check_attention = dasd_eckd_check_attention,
5795 .host_access_count = dasd_eckd_host_access_count,
5796 .hosts_print = dasd_hosts_print,
5797 .handle_hpf_error = dasd_eckd_handle_hpf_error,
5798 .disable_hpf = dasd_eckd_disable_hpf_device,
5799 .hpf_enabled = dasd_eckd_hpf_enabled,
5800 .reset_path = dasd_eckd_reset_path,
5804 dasd_eckd_init(void)
5808 ASCEBC(dasd_eckd_discipline.ebcname, 4);
5809 dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req),
5810 GFP_KERNEL | GFP_DMA);
5811 if (!dasd_reserve_req)
5813 path_verification_worker = kmalloc(sizeof(*path_verification_worker),
5814 GFP_KERNEL | GFP_DMA);
5815 if (!path_verification_worker) {
5816 kfree(dasd_reserve_req);
5819 rawpadpage = (void *)__get_free_page(GFP_KERNEL);
5821 kfree(path_verification_worker);
5822 kfree(dasd_reserve_req);
5825 ret = ccw_driver_register(&dasd_eckd_driver);
5827 wait_for_device_probe();
5829 kfree(path_verification_worker);
5830 kfree(dasd_reserve_req);
5831 free_page((unsigned long)rawpadpage);
5837 dasd_eckd_cleanup(void)
5839 ccw_driver_unregister(&dasd_eckd_driver);
5840 kfree(path_verification_worker);
5841 kfree(dasd_reserve_req);
5842 free_page((unsigned long)rawpadpage);
5845 module_init(dasd_eckd_init);
5846 module_exit(dasd_eckd_cleanup);