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 check_XRC(struct ccw1 *ccw, struct DE_eckd_data *data,
218 struct dasd_device *device)
220 struct dasd_eckd_private *private = device->private;
223 if (!private->rdc_data.facilities.XRC_supported)
226 /* switch on System Time Stamp - needed for XRC Support */
227 data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */
228 data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */
230 rc = get_phys_clock(&data->ep_sys_time);
231 /* Ignore return code if sync clock is switched off. */
232 if (rc == -EOPNOTSUPP || rc == -EACCES)
236 ccw->count = sizeof(struct DE_eckd_data);
237 ccw->flags |= CCW_FLAG_SLI;
244 define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk,
245 unsigned int totrk, int cmd, struct dasd_device *device,
248 struct dasd_eckd_private *private = device->private;
249 u16 heads, beghead, endhead;
254 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT;
257 ccw->cda = (__u32)__pa(data);
260 memset(data, 0, sizeof(struct DE_eckd_data));
262 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
263 case DASD_ECKD_CCW_READ_RECORD_ZERO:
264 case DASD_ECKD_CCW_READ:
265 case DASD_ECKD_CCW_READ_MT:
266 case DASD_ECKD_CCW_READ_CKD:
267 case DASD_ECKD_CCW_READ_CKD_MT:
268 case DASD_ECKD_CCW_READ_KD:
269 case DASD_ECKD_CCW_READ_KD_MT:
270 data->mask.perm = 0x1;
271 data->attributes.operation = private->attrib.operation;
273 case DASD_ECKD_CCW_READ_COUNT:
274 data->mask.perm = 0x1;
275 data->attributes.operation = DASD_BYPASS_CACHE;
277 case DASD_ECKD_CCW_READ_TRACK:
278 case DASD_ECKD_CCW_READ_TRACK_DATA:
279 data->mask.perm = 0x1;
280 data->attributes.operation = private->attrib.operation;
283 case DASD_ECKD_CCW_WRITE:
284 case DASD_ECKD_CCW_WRITE_MT:
285 case DASD_ECKD_CCW_WRITE_KD:
286 case DASD_ECKD_CCW_WRITE_KD_MT:
287 data->mask.perm = 0x02;
288 data->attributes.operation = private->attrib.operation;
289 rc = check_XRC(ccw, data, device);
291 case DASD_ECKD_CCW_WRITE_CKD:
292 case DASD_ECKD_CCW_WRITE_CKD_MT:
293 data->attributes.operation = DASD_BYPASS_CACHE;
294 rc = check_XRC(ccw, data, device);
296 case DASD_ECKD_CCW_ERASE:
297 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
298 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
299 data->mask.perm = 0x3;
300 data->mask.auth = 0x1;
301 data->attributes.operation = DASD_BYPASS_CACHE;
302 rc = check_XRC(ccw, data, device);
304 case DASD_ECKD_CCW_WRITE_FULL_TRACK:
305 data->mask.perm = 0x03;
306 data->attributes.operation = private->attrib.operation;
309 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
310 data->mask.perm = 0x02;
311 data->attributes.operation = private->attrib.operation;
312 data->blk_size = blksize;
313 rc = check_XRC(ccw, data, device);
316 dev_err(&device->cdev->dev,
317 "0x%x is not a known command\n", cmd);
321 data->attributes.mode = 0x3; /* ECKD */
323 if ((private->rdc_data.cu_type == 0x2105 ||
324 private->rdc_data.cu_type == 0x2107 ||
325 private->rdc_data.cu_type == 0x1750)
326 && !(private->uses_cdl && trk < 2))
327 data->ga_extended |= 0x40; /* Regular Data Format Mode */
329 heads = private->rdc_data.trk_per_cyl;
330 begcyl = trk / heads;
331 beghead = trk % heads;
332 endcyl = totrk / heads;
333 endhead = totrk % heads;
335 /* check for sequential prestage - enhance cylinder range */
336 if (data->attributes.operation == DASD_SEQ_PRESTAGE ||
337 data->attributes.operation == DASD_SEQ_ACCESS) {
339 if (endcyl + private->attrib.nr_cyl < private->real_cyl)
340 endcyl += private->attrib.nr_cyl;
342 endcyl = (private->real_cyl - 1);
345 set_ch_t(&data->beg_ext, begcyl, beghead);
346 set_ch_t(&data->end_ext, endcyl, endhead);
351 static void locate_record_ext(struct ccw1 *ccw, struct LRE_eckd_data *data,
352 unsigned int trk, unsigned int rec_on_trk,
353 int count, int cmd, struct dasd_device *device,
354 unsigned int reclen, unsigned int tlf)
356 struct dasd_eckd_private *private = device->private;
361 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD_EXT;
363 if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK)
367 ccw->cda = (__u32)__pa(data);
370 memset(data, 0, sizeof(*data));
373 switch (private->rdc_data.dev_type) {
375 dn = ceil_quot(reclen + 6, 232);
376 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
377 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
380 d = 7 + ceil_quot(reclen + 12, 32);
381 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
385 data->sector = sector;
386 /* note: meaning of count depends on the operation
387 * for record based I/O it's the number of records, but for
388 * track based I/O it's the number of tracks
392 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
393 data->operation.orientation = 0x3;
394 data->operation.operation = 0x03;
396 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
397 data->operation.orientation = 0x3;
398 data->operation.operation = 0x16;
400 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
401 data->operation.orientation = 0x1;
402 data->operation.operation = 0x03;
405 case DASD_ECKD_CCW_READ_RECORD_ZERO:
406 data->operation.orientation = 0x3;
407 data->operation.operation = 0x16;
410 case DASD_ECKD_CCW_WRITE:
411 case DASD_ECKD_CCW_WRITE_MT:
412 case DASD_ECKD_CCW_WRITE_KD:
413 case DASD_ECKD_CCW_WRITE_KD_MT:
414 data->auxiliary.length_valid = 0x1;
415 data->length = reclen;
416 data->operation.operation = 0x01;
418 case DASD_ECKD_CCW_WRITE_CKD:
419 case DASD_ECKD_CCW_WRITE_CKD_MT:
420 data->auxiliary.length_valid = 0x1;
421 data->length = reclen;
422 data->operation.operation = 0x03;
424 case DASD_ECKD_CCW_WRITE_FULL_TRACK:
425 data->operation.orientation = 0x0;
426 data->operation.operation = 0x3F;
427 data->extended_operation = 0x11;
429 data->extended_parameter_length = 0x02;
430 if (data->count > 8) {
431 data->extended_parameter[0] = 0xFF;
432 data->extended_parameter[1] = 0xFF;
433 data->extended_parameter[1] <<= (16 - count);
435 data->extended_parameter[0] = 0xFF;
436 data->extended_parameter[0] <<= (8 - count);
437 data->extended_parameter[1] = 0x00;
441 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
442 data->auxiliary.length_valid = 0x1;
443 data->length = reclen; /* not tlf, as one might think */
444 data->operation.operation = 0x3F;
445 data->extended_operation = 0x23;
447 case DASD_ECKD_CCW_READ:
448 case DASD_ECKD_CCW_READ_MT:
449 case DASD_ECKD_CCW_READ_KD:
450 case DASD_ECKD_CCW_READ_KD_MT:
451 data->auxiliary.length_valid = 0x1;
452 data->length = reclen;
453 data->operation.operation = 0x06;
455 case DASD_ECKD_CCW_READ_CKD:
456 case DASD_ECKD_CCW_READ_CKD_MT:
457 data->auxiliary.length_valid = 0x1;
458 data->length = reclen;
459 data->operation.operation = 0x16;
461 case DASD_ECKD_CCW_READ_COUNT:
462 data->operation.operation = 0x06;
464 case DASD_ECKD_CCW_READ_TRACK:
465 data->operation.orientation = 0x1;
466 data->operation.operation = 0x0C;
467 data->extended_parameter_length = 0;
470 case DASD_ECKD_CCW_READ_TRACK_DATA:
471 data->auxiliary.length_valid = 0x1;
473 data->operation.operation = 0x0C;
475 case DASD_ECKD_CCW_ERASE:
476 data->length = reclen;
477 data->auxiliary.length_valid = 0x1;
478 data->operation.operation = 0x0b;
481 DBF_DEV_EVENT(DBF_ERR, device,
482 "fill LRE unknown opcode 0x%x", cmd);
485 set_ch_t(&data->seek_addr,
486 trk / private->rdc_data.trk_per_cyl,
487 trk % private->rdc_data.trk_per_cyl);
488 data->search_arg.cyl = data->seek_addr.cyl;
489 data->search_arg.head = data->seek_addr.head;
490 data->search_arg.record = rec_on_trk;
493 static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
494 unsigned int trk, unsigned int totrk, int cmd,
495 struct dasd_device *basedev, struct dasd_device *startdev,
496 unsigned int format, unsigned int rec_on_trk, int count,
497 unsigned int blksize, unsigned int tlf)
499 struct dasd_eckd_private *basepriv, *startpriv;
500 struct LRE_eckd_data *lredata;
501 struct DE_eckd_data *dedata;
504 basepriv = basedev->private;
505 startpriv = startdev->private;
506 dedata = &pfxdata->define_extent;
507 lredata = &pfxdata->locate_record;
509 ccw->cmd_code = DASD_ECKD_CCW_PFX;
511 if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) {
512 ccw->count = sizeof(*pfxdata) + 2;
513 ccw->cda = (__u32) __pa(pfxdata);
514 memset(pfxdata, 0, sizeof(*pfxdata) + 2);
516 ccw->count = sizeof(*pfxdata);
517 ccw->cda = (__u32) __pa(pfxdata);
518 memset(pfxdata, 0, sizeof(*pfxdata));
523 DBF_DEV_EVENT(DBF_ERR, basedev,
524 "PFX LRE unknown format 0x%x", format);
528 pfxdata->format = format;
529 pfxdata->base_address = basepriv->ned->unit_addr;
530 pfxdata->base_lss = basepriv->ned->ID;
531 pfxdata->validity.define_extent = 1;
533 /* private uid is kept up to date, conf_data may be outdated */
534 if (startpriv->uid.type != UA_BASE_DEVICE) {
535 pfxdata->validity.verify_base = 1;
536 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS)
537 pfxdata->validity.hyper_pav = 1;
540 rc = define_extent(NULL, dedata, trk, totrk, cmd, basedev, blksize);
543 * For some commands the System Time Stamp is set in the define extent
544 * data when XRC is supported. The validity of the time stamp must be
545 * reflected in the prefix data as well.
547 if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02)
548 pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */
551 locate_record_ext(NULL, lredata, trk, rec_on_trk, count, cmd,
552 basedev, blksize, tlf);
558 static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
559 unsigned int trk, unsigned int totrk, int cmd,
560 struct dasd_device *basedev, struct dasd_device *startdev)
562 return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev,
567 locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk,
568 unsigned int rec_on_trk, int no_rec, int cmd,
569 struct dasd_device * device, int reclen)
571 struct dasd_eckd_private *private = device->private;
575 DBF_DEV_EVENT(DBF_INFO, device,
576 "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d",
577 trk, rec_on_trk, no_rec, cmd, reclen);
579 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD;
582 ccw->cda = (__u32) __pa(data);
584 memset(data, 0, sizeof(struct LO_eckd_data));
587 switch (private->rdc_data.dev_type) {
589 dn = ceil_quot(reclen + 6, 232);
590 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
591 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
594 d = 7 + ceil_quot(reclen + 12, 32);
595 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
599 data->sector = sector;
600 data->count = no_rec;
602 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
603 data->operation.orientation = 0x3;
604 data->operation.operation = 0x03;
606 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
607 data->operation.orientation = 0x3;
608 data->operation.operation = 0x16;
610 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
611 data->operation.orientation = 0x1;
612 data->operation.operation = 0x03;
615 case DASD_ECKD_CCW_READ_RECORD_ZERO:
616 data->operation.orientation = 0x3;
617 data->operation.operation = 0x16;
620 case DASD_ECKD_CCW_WRITE:
621 case DASD_ECKD_CCW_WRITE_MT:
622 case DASD_ECKD_CCW_WRITE_KD:
623 case DASD_ECKD_CCW_WRITE_KD_MT:
624 data->auxiliary.last_bytes_used = 0x1;
625 data->length = reclen;
626 data->operation.operation = 0x01;
628 case DASD_ECKD_CCW_WRITE_CKD:
629 case DASD_ECKD_CCW_WRITE_CKD_MT:
630 data->auxiliary.last_bytes_used = 0x1;
631 data->length = reclen;
632 data->operation.operation = 0x03;
634 case DASD_ECKD_CCW_READ:
635 case DASD_ECKD_CCW_READ_MT:
636 case DASD_ECKD_CCW_READ_KD:
637 case DASD_ECKD_CCW_READ_KD_MT:
638 data->auxiliary.last_bytes_used = 0x1;
639 data->length = reclen;
640 data->operation.operation = 0x06;
642 case DASD_ECKD_CCW_READ_CKD:
643 case DASD_ECKD_CCW_READ_CKD_MT:
644 data->auxiliary.last_bytes_used = 0x1;
645 data->length = reclen;
646 data->operation.operation = 0x16;
648 case DASD_ECKD_CCW_READ_COUNT:
649 data->operation.operation = 0x06;
651 case DASD_ECKD_CCW_ERASE:
652 data->length = reclen;
653 data->auxiliary.last_bytes_used = 0x1;
654 data->operation.operation = 0x0b;
657 DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record "
660 set_ch_t(&data->seek_addr,
661 trk / private->rdc_data.trk_per_cyl,
662 trk % private->rdc_data.trk_per_cyl);
663 data->search_arg.cyl = data->seek_addr.cyl;
664 data->search_arg.head = data->seek_addr.head;
665 data->search_arg.record = rec_on_trk;
669 * Returns 1 if the block is one of the special blocks that needs
670 * to get read/written with the KD variant of the command.
671 * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and
672 * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT.
673 * Luckily the KD variants differ only by one bit (0x08) from the
674 * normal variant. So don't wonder about code like:
675 * if (dasd_eckd_cdl_special(blk_per_trk, recid))
676 * ccw->cmd_code |= 0x8;
679 dasd_eckd_cdl_special(int blk_per_trk, int recid)
683 if (recid < blk_per_trk)
685 if (recid < 2 * blk_per_trk)
691 * Returns the record size for the special blocks of the cdl format.
692 * Only returns something useful if dasd_eckd_cdl_special is true
696 dasd_eckd_cdl_reclen(int recid)
699 return sizes_trk0[recid];
702 /* create unique id from private structure. */
703 static void create_uid(struct dasd_eckd_private *private)
706 struct dasd_uid *uid;
709 memset(uid, 0, sizeof(struct dasd_uid));
710 memcpy(uid->vendor, private->ned->HDA_manufacturer,
711 sizeof(uid->vendor) - 1);
712 EBCASC(uid->vendor, sizeof(uid->vendor) - 1);
713 memcpy(uid->serial, private->ned->HDA_location,
714 sizeof(uid->serial) - 1);
715 EBCASC(uid->serial, sizeof(uid->serial) - 1);
716 uid->ssid = private->gneq->subsystemID;
717 uid->real_unit_addr = private->ned->unit_addr;
719 uid->type = private->sneq->sua_flags;
720 if (uid->type == UA_BASE_PAV_ALIAS)
721 uid->base_unit_addr = private->sneq->base_unit_addr;
723 uid->type = UA_BASE_DEVICE;
725 if (private->vdsneq) {
726 for (count = 0; count < 16; count++) {
727 sprintf(uid->vduit+2*count, "%02x",
728 private->vdsneq->uit[count]);
734 * Generate device unique id that specifies the physical device.
736 static int dasd_eckd_generate_uid(struct dasd_device *device)
738 struct dasd_eckd_private *private = device->private;
743 if (!private->ned || !private->gneq)
745 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
747 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
751 static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid)
753 struct dasd_eckd_private *private = device->private;
757 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
759 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
766 * compare device UID with data of a given dasd_eckd_private structure
769 static int dasd_eckd_compare_path_uid(struct dasd_device *device,
770 struct dasd_eckd_private *private)
772 struct dasd_uid device_uid;
775 dasd_eckd_get_uid(device, &device_uid);
777 return memcmp(&device_uid, &private->uid, sizeof(struct dasd_uid));
780 static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device,
781 struct dasd_ccw_req *cqr,
787 * buffer has to start with EBCDIC "V1.0" to show
788 * support for virtual device SNEQ
790 rcd_buffer[0] = 0xE5;
791 rcd_buffer[1] = 0xF1;
792 rcd_buffer[2] = 0x4B;
793 rcd_buffer[3] = 0xF0;
796 ccw->cmd_code = DASD_ECKD_CCW_RCD;
798 ccw->cda = (__u32)(addr_t)rcd_buffer;
799 ccw->count = DASD_ECKD_RCD_DATA_SIZE;
800 cqr->magic = DASD_ECKD_MAGIC;
802 cqr->startdev = device;
803 cqr->memdev = device;
805 cqr->expires = 10*HZ;
808 cqr->buildclk = get_tod_clock();
809 cqr->status = DASD_CQR_FILLED;
810 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags);
814 * Wakeup helper for read_conf
815 * if the cqr is not done and needs some error recovery
816 * the buffer has to be re-initialized with the EBCDIC "V1.0"
817 * to show support for virtual device SNEQ
819 static void read_conf_cb(struct dasd_ccw_req *cqr, void *data)
824 if (cqr->status != DASD_CQR_DONE) {
826 rcd_buffer = (__u8 *)((addr_t) ccw->cda);
827 memset(rcd_buffer, 0, sizeof(*rcd_buffer));
829 rcd_buffer[0] = 0xE5;
830 rcd_buffer[1] = 0xF1;
831 rcd_buffer[2] = 0x4B;
832 rcd_buffer[3] = 0xF0;
834 dasd_wakeup_cb(cqr, data);
837 static int dasd_eckd_read_conf_immediately(struct dasd_device *device,
838 struct dasd_ccw_req *cqr,
845 * sanity check: scan for RCD command in extended SenseID data
846 * some devices do not support RCD
848 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD);
849 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD)
852 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm);
853 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
854 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags);
856 cqr->callback = read_conf_cb;
857 rc = dasd_sleep_on_immediatly(cqr);
861 static int dasd_eckd_read_conf_lpm(struct dasd_device *device,
863 int *rcd_buffer_size, __u8 lpm)
866 char *rcd_buf = NULL;
868 struct dasd_ccw_req *cqr;
871 * sanity check: scan for RCD command in extended SenseID data
872 * some devices do not support RCD
874 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD);
875 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) {
879 rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA);
884 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */,
885 0, /* use rcd_buf as data ara */
888 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
889 "Could not allocate RCD request");
893 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm);
894 cqr->callback = read_conf_cb;
895 ret = dasd_sleep_on(cqr);
897 * on success we update the user input parms
899 dasd_sfree_request(cqr, cqr->memdev);
903 *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE;
904 *rcd_buffer = rcd_buf;
909 *rcd_buffer_size = 0;
913 static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private)
916 struct dasd_sneq *sneq;
920 private->sneq = NULL;
921 private->vdsneq = NULL;
922 private->gneq = NULL;
923 count = private->conf_len / sizeof(struct dasd_sneq);
924 sneq = (struct dasd_sneq *)private->conf_data;
925 for (i = 0; i < count; ++i) {
926 if (sneq->flags.identifier == 1 && sneq->format == 1)
927 private->sneq = sneq;
928 else if (sneq->flags.identifier == 1 && sneq->format == 4)
929 private->vdsneq = (struct vd_sneq *)sneq;
930 else if (sneq->flags.identifier == 2)
931 private->gneq = (struct dasd_gneq *)sneq;
932 else if (sneq->flags.identifier == 3 && sneq->res1 == 1)
933 private->ned = (struct dasd_ned *)sneq;
936 if (!private->ned || !private->gneq) {
938 private->sneq = NULL;
939 private->vdsneq = NULL;
940 private->gneq = NULL;
947 static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len)
949 struct dasd_gneq *gneq;
952 count = conf_len / sizeof(*gneq);
953 gneq = (struct dasd_gneq *)conf_data;
955 for (i = 0; i < count; ++i) {
956 if (gneq->flags.identifier == 2) {
963 return ((char *)gneq)[18] & 0x07;
968 static void dasd_eckd_clear_conf_data(struct dasd_device *device)
970 struct dasd_eckd_private *private = device->private;
973 private->conf_data = NULL;
974 private->conf_len = 0;
975 for (i = 0; i < 8; i++) {
976 kfree(device->path[i].conf_data);
977 device->path[i].conf_data = NULL;
978 device->path[i].cssid = 0;
979 device->path[i].ssid = 0;
980 device->path[i].chpid = 0;
985 static int dasd_eckd_read_conf(struct dasd_device *device)
988 int conf_len, conf_data_saved;
989 int rc, path_err, pos;
991 struct dasd_eckd_private *private, path_private;
992 struct dasd_uid *uid;
993 char print_path_uid[60], print_device_uid[60];
994 struct channel_path_desc *chp_desc;
995 struct subchannel_id sch_id;
997 private = device->private;
998 opm = ccw_device_get_path_mask(device->cdev);
999 ccw_device_get_schid(device->cdev, &sch_id);
1000 conf_data_saved = 0;
1002 /* get configuration data per operational path */
1003 for (lpm = 0x80; lpm; lpm>>= 1) {
1006 rc = dasd_eckd_read_conf_lpm(device, &conf_data,
1008 if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */
1009 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1010 "Read configuration data returned "
1014 if (conf_data == NULL) {
1015 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1016 "No configuration data "
1018 /* no further analysis possible */
1019 dasd_path_add_opm(device, opm);
1020 continue; /* no error */
1022 /* save first valid configuration data */
1023 if (!conf_data_saved) {
1024 /* initially clear previously stored conf_data */
1025 dasd_eckd_clear_conf_data(device);
1026 private->conf_data = conf_data;
1027 private->conf_len = conf_len;
1028 if (dasd_eckd_identify_conf_parts(private)) {
1029 private->conf_data = NULL;
1030 private->conf_len = 0;
1034 pos = pathmask_to_pos(lpm);
1035 /* store per path conf_data */
1036 device->path[pos].conf_data = conf_data;
1037 device->path[pos].cssid = sch_id.cssid;
1038 device->path[pos].ssid = sch_id.ssid;
1039 chp_desc = ccw_device_get_chp_desc(device->cdev, pos);
1041 device->path[pos].chpid = chp_desc->chpid;
1044 * build device UID that other path data
1045 * can be compared to it
1047 dasd_eckd_generate_uid(device);
1050 path_private.conf_data = conf_data;
1051 path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE;
1052 if (dasd_eckd_identify_conf_parts(
1054 path_private.conf_data = NULL;
1055 path_private.conf_len = 0;
1059 if (dasd_eckd_compare_path_uid(
1060 device, &path_private)) {
1061 uid = &path_private.uid;
1062 if (strlen(uid->vduit) > 0)
1063 snprintf(print_path_uid,
1064 sizeof(print_path_uid),
1065 "%s.%s.%04x.%02x.%s",
1066 uid->vendor, uid->serial,
1067 uid->ssid, uid->real_unit_addr,
1070 snprintf(print_path_uid,
1071 sizeof(print_path_uid),
1073 uid->vendor, uid->serial,
1075 uid->real_unit_addr);
1076 uid = &private->uid;
1077 if (strlen(uid->vduit) > 0)
1078 snprintf(print_device_uid,
1079 sizeof(print_device_uid),
1080 "%s.%s.%04x.%02x.%s",
1081 uid->vendor, uid->serial,
1082 uid->ssid, uid->real_unit_addr,
1085 snprintf(print_device_uid,
1086 sizeof(print_device_uid),
1088 uid->vendor, uid->serial,
1090 uid->real_unit_addr);
1091 dev_err(&device->cdev->dev,
1092 "Not all channel paths lead to "
1093 "the same device, path %02X leads to "
1094 "device %s instead of %s\n", lpm,
1095 print_path_uid, print_device_uid);
1097 dasd_path_add_cablepm(device, lpm);
1100 pos = pathmask_to_pos(lpm);
1101 /* store per path conf_data */
1102 device->path[pos].conf_data = conf_data;
1103 device->path[pos].cssid = sch_id.cssid;
1104 device->path[pos].ssid = sch_id.ssid;
1105 chp_desc = ccw_device_get_chp_desc(device->cdev, pos);
1107 device->path[pos].chpid = chp_desc->chpid;
1109 path_private.conf_data = NULL;
1110 path_private.conf_len = 0;
1112 switch (dasd_eckd_path_access(conf_data, conf_len)) {
1114 dasd_path_add_nppm(device, lpm);
1117 dasd_path_add_ppm(device, lpm);
1120 if (!dasd_path_get_opm(device)) {
1121 dasd_path_set_opm(device, lpm);
1122 dasd_generic_path_operational(device);
1124 dasd_path_add_opm(device, lpm);
1131 static u32 get_fcx_max_data(struct dasd_device *device)
1133 struct dasd_eckd_private *private = device->private;
1134 int fcx_in_css, fcx_in_gneq, fcx_in_features;
1139 /* is transport mode supported? */
1140 fcx_in_css = css_general_characteristics.fcx;
1141 fcx_in_gneq = private->gneq->reserved2[7] & 0x04;
1142 fcx_in_features = private->features.feature[40] & 0x80;
1143 tpm = fcx_in_css && fcx_in_gneq && fcx_in_features;
1148 mdc = ccw_device_get_mdc(device->cdev, 0);
1150 dev_warn(&device->cdev->dev, "Detecting the maximum supported data size for zHPF requests failed\n");
1153 return (u32)mdc * FCX_MAX_DATA_FACTOR;
1157 static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm)
1159 struct dasd_eckd_private *private = device->private;
1163 if (private->fcx_max_data) {
1164 mdc = ccw_device_get_mdc(device->cdev, lpm);
1166 dev_warn(&device->cdev->dev,
1167 "Detecting the maximum data size for zHPF "
1168 "requests failed (rc=%d) for a new path %x\n",
1172 fcx_max_data = (u32)mdc * FCX_MAX_DATA_FACTOR;
1173 if (fcx_max_data < private->fcx_max_data) {
1174 dev_warn(&device->cdev->dev,
1175 "The maximum data size for zHPF requests %u "
1176 "on a new path %x is below the active maximum "
1177 "%u\n", fcx_max_data, lpm,
1178 private->fcx_max_data);
1185 static int rebuild_device_uid(struct dasd_device *device,
1186 struct path_verification_work_data *data)
1188 struct dasd_eckd_private *private = device->private;
1189 __u8 lpm, opm = dasd_path_get_opm(device);
1192 for (lpm = 0x80; lpm; lpm >>= 1) {
1195 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer));
1196 memset(&data->cqr, 0, sizeof(data->cqr));
1197 data->cqr.cpaddr = &data->ccw;
1198 rc = dasd_eckd_read_conf_immediately(device, &data->cqr,
1203 if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */
1205 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1206 "Read configuration data "
1207 "returned error %d", rc);
1210 memcpy(private->conf_data, data->rcd_buffer,
1211 DASD_ECKD_RCD_DATA_SIZE);
1212 if (dasd_eckd_identify_conf_parts(private)) {
1214 } else /* first valid path is enough */
1219 rc = dasd_eckd_generate_uid(device);
1224 static void do_path_verification_work(struct work_struct *work)
1226 struct path_verification_work_data *data;
1227 struct dasd_device *device;
1228 struct dasd_eckd_private path_private;
1229 struct dasd_uid *uid;
1230 __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE];
1231 __u8 lpm, opm, npm, ppm, epm, hpfpm, cablepm;
1232 unsigned long flags;
1236 data = container_of(work, struct path_verification_work_data, worker);
1237 device = data->device;
1239 /* delay path verification until device was resumed */
1240 if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) {
1241 schedule_work(work);
1244 /* check if path verification already running and delay if so */
1245 if (test_and_set_bit(DASD_FLAG_PATH_VERIFY, &device->flags)) {
1246 schedule_work(work);
1256 for (lpm = 0x80; lpm; lpm >>= 1) {
1257 if (!(lpm & data->tbvpm))
1259 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer));
1260 memset(&data->cqr, 0, sizeof(data->cqr));
1261 data->cqr.cpaddr = &data->ccw;
1262 rc = dasd_eckd_read_conf_immediately(device, &data->cqr,
1266 switch (dasd_eckd_path_access(data->rcd_buffer,
1267 DASD_ECKD_RCD_DATA_SIZE)
1277 } else if (rc == -EOPNOTSUPP) {
1278 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1279 "path verification: No configuration "
1282 } else if (rc == -EAGAIN) {
1283 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1284 "path verification: device is stopped,"
1285 " try again later");
1288 dev_warn(&device->cdev->dev,
1289 "Reading device feature codes failed "
1290 "(rc=%d) for new path %x\n", rc, lpm);
1293 if (verify_fcx_max_data(device, lpm)) {
1302 * save conf_data for comparison after
1303 * rebuild_device_uid may have changed
1306 memcpy(&path_rcd_buf, data->rcd_buffer,
1307 DASD_ECKD_RCD_DATA_SIZE);
1308 path_private.conf_data = (void *) &path_rcd_buf;
1309 path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE;
1310 if (dasd_eckd_identify_conf_parts(&path_private)) {
1311 path_private.conf_data = NULL;
1312 path_private.conf_len = 0;
1317 * compare path UID with device UID only if at least
1318 * one valid path is left
1319 * in other case the device UID may have changed and
1320 * the first working path UID will be used as device UID
1322 if (dasd_path_get_opm(device) &&
1323 dasd_eckd_compare_path_uid(device, &path_private)) {
1325 * the comparison was not successful
1326 * rebuild the device UID with at least one
1327 * known path in case a z/VM hyperswap command
1328 * has changed the device
1330 * after this compare again
1332 * if either the rebuild or the recompare fails
1333 * the path can not be used
1335 if (rebuild_device_uid(device, data) ||
1336 dasd_eckd_compare_path_uid(
1337 device, &path_private)) {
1338 uid = &path_private.uid;
1339 if (strlen(uid->vduit) > 0)
1340 snprintf(print_uid, sizeof(print_uid),
1341 "%s.%s.%04x.%02x.%s",
1342 uid->vendor, uid->serial,
1343 uid->ssid, uid->real_unit_addr,
1346 snprintf(print_uid, sizeof(print_uid),
1348 uid->vendor, uid->serial,
1350 uid->real_unit_addr);
1351 dev_err(&device->cdev->dev,
1352 "The newly added channel path %02X "
1353 "will not be used because it leads "
1354 "to a different device %s\n",
1365 * There is a small chance that a path is lost again between
1366 * above path verification and the following modification of
1367 * the device opm mask. We could avoid that race here by using
1368 * yet another path mask, but we rather deal with this unlikely
1369 * situation in dasd_start_IO.
1371 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
1372 if (!dasd_path_get_opm(device) && opm) {
1373 dasd_path_set_opm(device, opm);
1374 dasd_generic_path_operational(device);
1376 dasd_path_add_opm(device, opm);
1378 dasd_path_add_nppm(device, npm);
1379 dasd_path_add_ppm(device, ppm);
1380 dasd_path_add_tbvpm(device, epm);
1381 dasd_path_add_cablepm(device, cablepm);
1382 dasd_path_add_nohpfpm(device, hpfpm);
1383 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
1385 clear_bit(DASD_FLAG_PATH_VERIFY, &device->flags);
1386 dasd_put_device(device);
1388 mutex_unlock(&dasd_path_verification_mutex);
1393 static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm)
1395 struct path_verification_work_data *data;
1397 data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA);
1399 if (mutex_trylock(&dasd_path_verification_mutex)) {
1400 data = path_verification_worker;
1405 memset(data, 0, sizeof(*data));
1408 INIT_WORK(&data->worker, do_path_verification_work);
1409 dasd_get_device(device);
1410 data->device = device;
1412 schedule_work(&data->worker);
1416 static void dasd_eckd_reset_path(struct dasd_device *device, __u8 pm)
1418 struct dasd_eckd_private *private = device->private;
1419 unsigned long flags;
1421 if (!private->fcx_max_data)
1422 private->fcx_max_data = get_fcx_max_data(device);
1423 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
1424 dasd_path_set_tbvpm(device, pm ? : dasd_path_get_notoperpm(device));
1425 dasd_schedule_device_bh(device);
1426 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
1429 static int dasd_eckd_read_features(struct dasd_device *device)
1431 struct dasd_eckd_private *private = device->private;
1432 struct dasd_psf_prssd_data *prssdp;
1433 struct dasd_rssd_features *features;
1434 struct dasd_ccw_req *cqr;
1438 memset(&private->features, 0, sizeof(struct dasd_rssd_features));
1439 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
1440 (sizeof(struct dasd_psf_prssd_data) +
1441 sizeof(struct dasd_rssd_features)),
1444 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not "
1445 "allocate initialization request");
1446 return PTR_ERR(cqr);
1448 cqr->startdev = device;
1449 cqr->memdev = device;
1452 cqr->expires = 10 * HZ;
1454 /* Prepare for Read Subsystem Data */
1455 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
1456 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
1457 prssdp->order = PSF_ORDER_PRSSD;
1458 prssdp->suborder = 0x41; /* Read Feature Codes */
1459 /* all other bytes of prssdp must be zero */
1462 ccw->cmd_code = DASD_ECKD_CCW_PSF;
1463 ccw->count = sizeof(struct dasd_psf_prssd_data);
1464 ccw->flags |= CCW_FLAG_CC;
1465 ccw->cda = (__u32)(addr_t) prssdp;
1467 /* Read Subsystem Data - feature codes */
1468 features = (struct dasd_rssd_features *) (prssdp + 1);
1469 memset(features, 0, sizeof(struct dasd_rssd_features));
1472 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
1473 ccw->count = sizeof(struct dasd_rssd_features);
1474 ccw->cda = (__u32)(addr_t) features;
1476 cqr->buildclk = get_tod_clock();
1477 cqr->status = DASD_CQR_FILLED;
1478 rc = dasd_sleep_on(cqr);
1480 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
1481 features = (struct dasd_rssd_features *) (prssdp + 1);
1482 memcpy(&private->features, features,
1483 sizeof(struct dasd_rssd_features));
1485 dev_warn(&device->cdev->dev, "Reading device feature codes"
1486 " failed with rc=%d\n", rc);
1487 dasd_sfree_request(cqr, cqr->memdev);
1493 * Build CP for Perform Subsystem Function - SSC.
1495 static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device,
1498 struct dasd_ccw_req *cqr;
1499 struct dasd_psf_ssc_data *psf_ssc_data;
1502 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ ,
1503 sizeof(struct dasd_psf_ssc_data),
1507 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1508 "Could not allocate PSF-SSC request");
1511 psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data;
1512 psf_ssc_data->order = PSF_ORDER_SSC;
1513 psf_ssc_data->suborder = 0xc0;
1515 psf_ssc_data->suborder |= 0x08;
1516 psf_ssc_data->reserved[0] = 0x88;
1519 ccw->cmd_code = DASD_ECKD_CCW_PSF;
1520 ccw->cda = (__u32)(addr_t)psf_ssc_data;
1523 cqr->startdev = device;
1524 cqr->memdev = device;
1527 cqr->expires = 10*HZ;
1528 cqr->buildclk = get_tod_clock();
1529 cqr->status = DASD_CQR_FILLED;
1534 * Perform Subsystem Function.
1535 * It is necessary to trigger CIO for channel revalidation since this
1536 * call might change behaviour of DASD devices.
1539 dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav,
1540 unsigned long flags)
1542 struct dasd_ccw_req *cqr;
1545 cqr = dasd_eckd_build_psf_ssc(device, enable_pav);
1547 return PTR_ERR(cqr);
1550 * set flags e.g. turn on failfast, to prevent blocking
1551 * the calling function should handle failed requests
1553 cqr->flags |= flags;
1555 rc = dasd_sleep_on(cqr);
1557 /* trigger CIO to reprobe devices */
1558 css_schedule_reprobe();
1559 else if (cqr->intrc == -EAGAIN)
1562 dasd_sfree_request(cqr, cqr->memdev);
1567 * Valide storage server of current device.
1569 static int dasd_eckd_validate_server(struct dasd_device *device,
1570 unsigned long flags)
1572 struct dasd_eckd_private *private = device->private;
1575 if (private->uid.type == UA_BASE_PAV_ALIAS ||
1576 private->uid.type == UA_HYPER_PAV_ALIAS)
1578 if (dasd_nopav || MACHINE_IS_VM)
1582 rc = dasd_eckd_psf_ssc(device, enable_pav, flags);
1584 /* may be requested feature is not available on server,
1585 * therefore just report error and go ahead */
1586 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x "
1587 "returned rc=%d", private->uid.ssid, rc);
1592 * worker to do a validate server in case of a lost pathgroup
1594 static void dasd_eckd_do_validate_server(struct work_struct *work)
1596 struct dasd_device *device = container_of(work, struct dasd_device,
1598 unsigned long flags = 0;
1600 set_bit(DASD_CQR_FLAGS_FAILFAST, &flags);
1601 if (dasd_eckd_validate_server(device, flags)
1603 /* schedule worker again if failed */
1604 schedule_work(&device->kick_validate);
1608 dasd_put_device(device);
1611 static void dasd_eckd_kick_validate_server(struct dasd_device *device)
1613 dasd_get_device(device);
1614 /* exit if device not online or in offline processing */
1615 if (test_bit(DASD_FLAG_OFFLINE, &device->flags) ||
1616 device->state < DASD_STATE_ONLINE) {
1617 dasd_put_device(device);
1620 /* queue call to do_validate_server to the kernel event daemon. */
1621 if (!schedule_work(&device->kick_validate))
1622 dasd_put_device(device);
1626 * Check device characteristics.
1627 * If the device is accessible using ECKD discipline, the device is enabled.
1630 dasd_eckd_check_characteristics(struct dasd_device *device)
1632 struct dasd_eckd_private *private = device->private;
1633 struct dasd_block *block;
1634 struct dasd_uid temp_uid;
1637 unsigned long value;
1639 /* setup work queue for validate server*/
1640 INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server);
1641 /* setup work queue for summary unit check */
1642 INIT_WORK(&device->suc_work, dasd_alias_handle_summary_unit_check);
1644 if (!ccw_device_is_pathgroup(device->cdev)) {
1645 dev_warn(&device->cdev->dev,
1646 "A channel path group could not be established\n");
1649 if (!ccw_device_is_multipath(device->cdev)) {
1650 dev_info(&device->cdev->dev,
1651 "The DASD is not operating in multipath mode\n");
1654 private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA);
1656 dev_warn(&device->cdev->dev,
1657 "Allocating memory for private DASD data "
1661 device->private = private;
1663 memset(private, 0, sizeof(*private));
1665 /* Invalidate status of initial analysis. */
1666 private->init_cqr_status = -1;
1667 /* Set default cache operations. */
1668 private->attrib.operation = DASD_NORMAL_CACHE;
1669 private->attrib.nr_cyl = 0;
1671 /* Read Configuration Data */
1672 rc = dasd_eckd_read_conf(device);
1676 /* set some default values */
1677 device->default_expires = DASD_EXPIRES;
1678 device->default_retries = DASD_RETRIES;
1679 device->path_thrhld = DASD_ECKD_PATH_THRHLD;
1680 device->path_interval = DASD_ECKD_PATH_INTERVAL;
1682 if (private->gneq) {
1684 for (i = 0; i < private->gneq->timeout.value; i++)
1686 value = value * private->gneq->timeout.number;
1687 /* do not accept useless values */
1688 if (value != 0 && value <= DASD_EXPIRES_MAX)
1689 device->default_expires = value;
1692 dasd_eckd_get_uid(device, &temp_uid);
1693 if (temp_uid.type == UA_BASE_DEVICE) {
1694 block = dasd_alloc_block();
1695 if (IS_ERR(block)) {
1696 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1697 "could not allocate dasd "
1699 rc = PTR_ERR(block);
1702 device->block = block;
1703 block->base = device;
1706 /* register lcu with alias handling, enable PAV */
1707 rc = dasd_alias_make_device_known_to_lcu(device);
1711 dasd_eckd_validate_server(device, 0);
1713 /* device may report different configuration data after LCU setup */
1714 rc = dasd_eckd_read_conf(device);
1718 /* Read Feature Codes */
1719 dasd_eckd_read_features(device);
1721 /* Read Device Characteristics */
1722 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
1723 &private->rdc_data, 64);
1725 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1726 "Read device characteristic failed, rc=%d", rc);
1730 if ((device->features & DASD_FEATURE_USERAW) &&
1731 !(private->rdc_data.facilities.RT_in_LR)) {
1732 dev_err(&device->cdev->dev, "The storage server does not "
1733 "support raw-track access\n");
1738 /* find the valid cylinder size */
1739 if (private->rdc_data.no_cyl == LV_COMPAT_CYL &&
1740 private->rdc_data.long_no_cyl)
1741 private->real_cyl = private->rdc_data.long_no_cyl;
1743 private->real_cyl = private->rdc_data.no_cyl;
1745 private->fcx_max_data = get_fcx_max_data(device);
1747 readonly = dasd_device_is_ro(device);
1749 set_bit(DASD_FLAG_DEVICE_RO, &device->flags);
1751 dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) "
1752 "with %d cylinders, %d heads, %d sectors%s\n",
1753 private->rdc_data.dev_type,
1754 private->rdc_data.dev_model,
1755 private->rdc_data.cu_type,
1756 private->rdc_data.cu_model.model,
1758 private->rdc_data.trk_per_cyl,
1759 private->rdc_data.sec_per_trk,
1760 readonly ? ", read-only device" : "");
1764 dasd_alias_disconnect_device_from_lcu(device);
1766 dasd_free_block(device->block);
1767 device->block = NULL;
1769 kfree(private->conf_data);
1770 kfree(device->private);
1771 device->private = NULL;
1775 static void dasd_eckd_uncheck_device(struct dasd_device *device)
1777 struct dasd_eckd_private *private = device->private;
1780 dasd_alias_disconnect_device_from_lcu(device);
1781 private->ned = NULL;
1782 private->sneq = NULL;
1783 private->vdsneq = NULL;
1784 private->gneq = NULL;
1785 private->conf_len = 0;
1786 for (i = 0; i < 8; i++) {
1787 kfree(device->path[i].conf_data);
1788 if ((__u8 *)device->path[i].conf_data ==
1789 private->conf_data) {
1790 private->conf_data = NULL;
1791 private->conf_len = 0;
1793 device->path[i].conf_data = NULL;
1794 device->path[i].cssid = 0;
1795 device->path[i].ssid = 0;
1796 device->path[i].chpid = 0;
1798 kfree(private->conf_data);
1799 private->conf_data = NULL;
1802 static struct dasd_ccw_req *
1803 dasd_eckd_analysis_ccw(struct dasd_device *device)
1805 struct dasd_eckd_private *private = device->private;
1806 struct eckd_count *count_data;
1807 struct LO_eckd_data *LO_data;
1808 struct dasd_ccw_req *cqr;
1810 int cplength, datasize;
1814 datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data);
1815 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device);
1819 /* Define extent for the first 3 tracks. */
1820 define_extent(ccw++, cqr->data, 0, 2,
1821 DASD_ECKD_CCW_READ_COUNT, device, 0);
1822 LO_data = cqr->data + sizeof(struct DE_eckd_data);
1823 /* Locate record for the first 4 records on track 0. */
1824 ccw[-1].flags |= CCW_FLAG_CC;
1825 locate_record(ccw++, LO_data++, 0, 0, 4,
1826 DASD_ECKD_CCW_READ_COUNT, device, 0);
1828 count_data = private->count_area;
1829 for (i = 0; i < 4; i++) {
1830 ccw[-1].flags |= CCW_FLAG_CC;
1831 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
1834 ccw->cda = (__u32)(addr_t) count_data;
1839 /* Locate record for the first record on track 2. */
1840 ccw[-1].flags |= CCW_FLAG_CC;
1841 locate_record(ccw++, LO_data++, 2, 0, 1,
1842 DASD_ECKD_CCW_READ_COUNT, device, 0);
1843 /* Read count ccw. */
1844 ccw[-1].flags |= CCW_FLAG_CC;
1845 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
1848 ccw->cda = (__u32)(addr_t) count_data;
1851 cqr->startdev = device;
1852 cqr->memdev = device;
1854 cqr->buildclk = get_tod_clock();
1855 cqr->status = DASD_CQR_FILLED;
1859 /* differentiate between 'no record found' and any other error */
1860 static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr)
1863 if (init_cqr->status == DASD_CQR_DONE)
1865 else if (init_cqr->status == DASD_CQR_NEED_ERP ||
1866 init_cqr->status == DASD_CQR_FAILED) {
1867 sense = dasd_get_sense(&init_cqr->irb);
1868 if (sense && (sense[1] & SNS1_NO_REC_FOUND))
1869 return INIT_CQR_UNFORMATTED;
1871 return INIT_CQR_ERROR;
1873 return INIT_CQR_ERROR;
1877 * This is the callback function for the init_analysis cqr. It saves
1878 * the status of the initial analysis ccw before it frees it and kicks
1879 * the device to continue the startup sequence. This will call
1880 * dasd_eckd_do_analysis again (if the devices has not been marked
1881 * for deletion in the meantime).
1883 static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr,
1886 struct dasd_device *device = init_cqr->startdev;
1887 struct dasd_eckd_private *private = device->private;
1889 private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr);
1890 dasd_sfree_request(init_cqr, device);
1891 dasd_kick_device(device);
1894 static int dasd_eckd_start_analysis(struct dasd_block *block)
1896 struct dasd_ccw_req *init_cqr;
1898 init_cqr = dasd_eckd_analysis_ccw(block->base);
1899 if (IS_ERR(init_cqr))
1900 return PTR_ERR(init_cqr);
1901 init_cqr->callback = dasd_eckd_analysis_callback;
1902 init_cqr->callback_data = NULL;
1903 init_cqr->expires = 5*HZ;
1904 /* first try without ERP, so we can later handle unformatted
1905 * devices as special case
1907 clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags);
1908 init_cqr->retries = 0;
1909 dasd_add_request_head(init_cqr);
1913 static int dasd_eckd_end_analysis(struct dasd_block *block)
1915 struct dasd_device *device = block->base;
1916 struct dasd_eckd_private *private = device->private;
1917 struct eckd_count *count_area;
1918 unsigned int sb, blk_per_trk;
1920 struct dasd_ccw_req *init_cqr;
1922 status = private->init_cqr_status;
1923 private->init_cqr_status = -1;
1924 if (status == INIT_CQR_ERROR) {
1925 /* try again, this time with full ERP */
1926 init_cqr = dasd_eckd_analysis_ccw(device);
1927 dasd_sleep_on(init_cqr);
1928 status = dasd_eckd_analysis_evaluation(init_cqr);
1929 dasd_sfree_request(init_cqr, device);
1932 if (device->features & DASD_FEATURE_USERAW) {
1933 block->bp_block = DASD_RAW_BLOCKSIZE;
1934 blk_per_trk = DASD_RAW_BLOCK_PER_TRACK;
1935 block->s2b_shift = 3;
1939 if (status == INIT_CQR_UNFORMATTED) {
1940 dev_warn(&device->cdev->dev, "The DASD is not formatted\n");
1941 return -EMEDIUMTYPE;
1942 } else if (status == INIT_CQR_ERROR) {
1943 dev_err(&device->cdev->dev,
1944 "Detecting the DASD disk layout failed because "
1945 "of an I/O error\n");
1949 private->uses_cdl = 1;
1950 /* Check Track 0 for Compatible Disk Layout */
1952 for (i = 0; i < 3; i++) {
1953 if (private->count_area[i].kl != 4 ||
1954 private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 ||
1955 private->count_area[i].cyl != 0 ||
1956 private->count_area[i].head != count_area_head[i] ||
1957 private->count_area[i].record != count_area_rec[i]) {
1958 private->uses_cdl = 0;
1963 count_area = &private->count_area[4];
1965 if (private->uses_cdl == 0) {
1966 for (i = 0; i < 5; i++) {
1967 if ((private->count_area[i].kl != 0) ||
1968 (private->count_area[i].dl !=
1969 private->count_area[0].dl) ||
1970 private->count_area[i].cyl != 0 ||
1971 private->count_area[i].head != count_area_head[i] ||
1972 private->count_area[i].record != count_area_rec[i])
1976 count_area = &private->count_area[0];
1978 if (private->count_area[3].record == 1)
1979 dev_warn(&device->cdev->dev,
1980 "Track 0 has no records following the VTOC\n");
1983 if (count_area != NULL && count_area->kl == 0) {
1984 /* we found notthing violating our disk layout */
1985 if (dasd_check_blocksize(count_area->dl) == 0)
1986 block->bp_block = count_area->dl;
1988 if (block->bp_block == 0) {
1989 dev_warn(&device->cdev->dev,
1990 "The disk layout of the DASD is not supported\n");
1991 return -EMEDIUMTYPE;
1993 block->s2b_shift = 0; /* bits to shift 512 to get a block */
1994 for (sb = 512; sb < block->bp_block; sb = sb << 1)
1997 blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block);
2000 block->blocks = (private->real_cyl *
2001 private->rdc_data.trk_per_cyl *
2004 dev_info(&device->cdev->dev,
2005 "DASD with %d KB/block, %d KB total size, %d KB/track, "
2006 "%s\n", (block->bp_block >> 10),
2007 ((private->real_cyl *
2008 private->rdc_data.trk_per_cyl *
2009 blk_per_trk * (block->bp_block >> 9)) >> 1),
2010 ((blk_per_trk * block->bp_block) >> 10),
2012 "compatible disk layout" : "linux disk layout");
2017 static int dasd_eckd_do_analysis(struct dasd_block *block)
2019 struct dasd_eckd_private *private = block->base->private;
2021 if (private->init_cqr_status < 0)
2022 return dasd_eckd_start_analysis(block);
2024 return dasd_eckd_end_analysis(block);
2027 static int dasd_eckd_basic_to_ready(struct dasd_device *device)
2029 return dasd_alias_add_device(device);
2032 static int dasd_eckd_online_to_ready(struct dasd_device *device)
2034 cancel_work_sync(&device->reload_device);
2035 cancel_work_sync(&device->kick_validate);
2039 static int dasd_eckd_basic_to_known(struct dasd_device *device)
2041 return dasd_alias_remove_device(device);
2045 dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo)
2047 struct dasd_eckd_private *private = block->base->private;
2049 if (dasd_check_blocksize(block->bp_block) == 0) {
2050 geo->sectors = recs_per_track(&private->rdc_data,
2051 0, block->bp_block);
2053 geo->cylinders = private->rdc_data.no_cyl;
2054 geo->heads = private->rdc_data.trk_per_cyl;
2059 * Build the TCW request for the format check
2061 static struct dasd_ccw_req *
2062 dasd_eckd_build_check_tcw(struct dasd_device *base, struct format_data_t *fdata,
2063 int enable_pav, struct eckd_count *fmt_buffer,
2066 struct dasd_eckd_private *start_priv;
2067 struct dasd_device *startdev = NULL;
2068 struct tidaw *last_tidaw = NULL;
2069 struct dasd_ccw_req *cqr;
2077 startdev = dasd_alias_get_start_dev(base);
2082 start_priv = startdev->private;
2084 count = rpt * (fdata->stop_unit - fdata->start_unit + 1);
2087 * we're adding 'count' amount of tidaw to the itcw.
2088 * calculate the corresponding itcw_size
2090 itcw_size = itcw_calc_size(0, count, 0);
2092 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev);
2096 start_priv->count++;
2098 itcw = itcw_init(cqr->data, itcw_size, ITCW_OP_READ, 0, count, 0);
2104 cqr->cpaddr = itcw_get_tcw(itcw);
2105 rc = prepare_itcw(itcw, fdata->start_unit, fdata->stop_unit,
2106 DASD_ECKD_CCW_READ_COUNT_MT, base, startdev, 0, count,
2107 sizeof(struct eckd_count),
2108 count * sizeof(struct eckd_count), 0, rpt);
2112 for (i = 0; i < count; i++) {
2113 last_tidaw = itcw_add_tidaw(itcw, 0, fmt_buffer++,
2114 sizeof(struct eckd_count));
2115 if (IS_ERR(last_tidaw)) {
2121 last_tidaw->flags |= TIDAW_FLAGS_LAST;
2122 itcw_finalize(itcw);
2125 cqr->startdev = startdev;
2126 cqr->memdev = startdev;
2127 cqr->basedev = base;
2128 cqr->retries = startdev->default_retries;
2129 cqr->expires = startdev->default_expires * HZ;
2130 cqr->buildclk = get_tod_clock();
2131 cqr->status = DASD_CQR_FILLED;
2132 /* Set flags to suppress output for expected errors */
2133 set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags);
2134 set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags);
2139 dasd_sfree_request(cqr, startdev);
2145 * Build the CCW request for the format check
2147 static struct dasd_ccw_req *
2148 dasd_eckd_build_check(struct dasd_device *base, struct format_data_t *fdata,
2149 int enable_pav, struct eckd_count *fmt_buffer, int rpt)
2151 struct dasd_eckd_private *start_priv;
2152 struct dasd_eckd_private *base_priv;
2153 struct dasd_device *startdev = NULL;
2154 struct dasd_ccw_req *cqr;
2157 int cplength, datasize;
2163 startdev = dasd_alias_get_start_dev(base);
2168 start_priv = startdev->private;
2169 base_priv = base->private;
2171 count = rpt * (fdata->stop_unit - fdata->start_unit + 1);
2173 use_prefix = base_priv->features.feature[8] & 0x01;
2177 datasize = sizeof(struct PFX_eckd_data);
2180 datasize = sizeof(struct DE_eckd_data) +
2181 sizeof(struct LO_eckd_data);
2185 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
2190 start_priv->count++;
2195 prefix_LRE(ccw++, data, fdata->start_unit, fdata->stop_unit,
2196 DASD_ECKD_CCW_READ_COUNT, base, startdev, 1, 0,
2199 define_extent(ccw++, data, fdata->start_unit, fdata->stop_unit,
2200 DASD_ECKD_CCW_READ_COUNT, startdev, 0);
2202 data += sizeof(struct DE_eckd_data);
2203 ccw[-1].flags |= CCW_FLAG_CC;
2205 locate_record(ccw++, data, fdata->start_unit, 0, count,
2206 DASD_ECKD_CCW_READ_COUNT, base, 0);
2209 for (i = 0; i < count; i++) {
2210 ccw[-1].flags |= CCW_FLAG_CC;
2211 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
2212 ccw->flags = CCW_FLAG_SLI;
2214 ccw->cda = (__u32)(addr_t) fmt_buffer;
2219 cqr->startdev = startdev;
2220 cqr->memdev = startdev;
2221 cqr->basedev = base;
2222 cqr->retries = DASD_RETRIES;
2223 cqr->expires = startdev->default_expires * HZ;
2224 cqr->buildclk = get_tod_clock();
2225 cqr->status = DASD_CQR_FILLED;
2226 /* Set flags to suppress output for expected errors */
2227 set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags);
2232 static struct dasd_ccw_req *
2233 dasd_eckd_build_format(struct dasd_device *base,
2234 struct format_data_t *fdata,
2237 struct dasd_eckd_private *base_priv;
2238 struct dasd_eckd_private *start_priv;
2239 struct dasd_device *startdev = NULL;
2240 struct dasd_ccw_req *fcp;
2241 struct eckd_count *ect;
2242 struct ch_t address;
2246 int cplength, datasize;
2254 startdev = dasd_alias_get_start_dev(base);
2259 start_priv = startdev->private;
2260 base_priv = base->private;
2262 rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize);
2264 nr_tracks = fdata->stop_unit - fdata->start_unit + 1;
2267 * fdata->intensity is a bit string that tells us what to do:
2268 * Bit 0: write record zero
2269 * Bit 1: write home address, currently not supported
2270 * Bit 2: invalidate tracks
2271 * Bit 3: use OS/390 compatible disk layout (cdl)
2272 * Bit 4: do not allow storage subsystem to modify record zero
2273 * Only some bit combinations do make sense.
2275 if (fdata->intensity & 0x10) {
2277 intensity = fdata->intensity & ~0x10;
2280 intensity = fdata->intensity;
2283 use_prefix = base_priv->features.feature[8] & 0x01;
2285 switch (intensity) {
2286 case 0x00: /* Normal format */
2287 case 0x08: /* Normal format, use cdl. */
2288 cplength = 2 + (rpt*nr_tracks);
2290 datasize = sizeof(struct PFX_eckd_data) +
2291 sizeof(struct LO_eckd_data) +
2292 rpt * nr_tracks * sizeof(struct eckd_count);
2294 datasize = sizeof(struct DE_eckd_data) +
2295 sizeof(struct LO_eckd_data) +
2296 rpt * nr_tracks * sizeof(struct eckd_count);
2298 case 0x01: /* Write record zero and format track. */
2299 case 0x09: /* Write record zero and format track, use cdl. */
2300 cplength = 2 + rpt * nr_tracks;
2302 datasize = sizeof(struct PFX_eckd_data) +
2303 sizeof(struct LO_eckd_data) +
2304 sizeof(struct eckd_count) +
2305 rpt * nr_tracks * sizeof(struct eckd_count);
2307 datasize = sizeof(struct DE_eckd_data) +
2308 sizeof(struct LO_eckd_data) +
2309 sizeof(struct eckd_count) +
2310 rpt * nr_tracks * sizeof(struct eckd_count);
2312 case 0x04: /* Invalidate track. */
2313 case 0x0c: /* Invalidate track, use cdl. */
2316 datasize = sizeof(struct PFX_eckd_data) +
2317 sizeof(struct LO_eckd_data) +
2318 sizeof(struct eckd_count);
2320 datasize = sizeof(struct DE_eckd_data) +
2321 sizeof(struct LO_eckd_data) +
2322 sizeof(struct eckd_count);
2325 dev_warn(&startdev->cdev->dev,
2326 "An I/O control call used incorrect flags 0x%x\n",
2328 return ERR_PTR(-EINVAL);
2330 /* Allocate the format ccw request. */
2331 fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength,
2332 datasize, startdev);
2336 start_priv->count++;
2340 switch (intensity & ~0x08) {
2341 case 0x00: /* Normal format. */
2343 prefix(ccw++, (struct PFX_eckd_data *) data,
2344 fdata->start_unit, fdata->stop_unit,
2345 DASD_ECKD_CCW_WRITE_CKD, base, startdev);
2346 /* grant subsystem permission to format R0 */
2348 ((struct PFX_eckd_data *)data)
2349 ->define_extent.ga_extended |= 0x04;
2350 data += sizeof(struct PFX_eckd_data);
2352 define_extent(ccw++, (struct DE_eckd_data *) data,
2353 fdata->start_unit, fdata->stop_unit,
2354 DASD_ECKD_CCW_WRITE_CKD, startdev, 0);
2355 /* grant subsystem permission to format R0 */
2357 ((struct DE_eckd_data *) data)
2358 ->ga_extended |= 0x04;
2359 data += sizeof(struct DE_eckd_data);
2361 ccw[-1].flags |= CCW_FLAG_CC;
2362 locate_record(ccw++, (struct LO_eckd_data *) data,
2363 fdata->start_unit, 0, rpt*nr_tracks,
2364 DASD_ECKD_CCW_WRITE_CKD, base,
2366 data += sizeof(struct LO_eckd_data);
2368 case 0x01: /* Write record zero + format track. */
2370 prefix(ccw++, (struct PFX_eckd_data *) data,
2371 fdata->start_unit, fdata->stop_unit,
2372 DASD_ECKD_CCW_WRITE_RECORD_ZERO,
2374 data += sizeof(struct PFX_eckd_data);
2376 define_extent(ccw++, (struct DE_eckd_data *) data,
2377 fdata->start_unit, fdata->stop_unit,
2378 DASD_ECKD_CCW_WRITE_RECORD_ZERO, startdev, 0);
2379 data += sizeof(struct DE_eckd_data);
2381 ccw[-1].flags |= CCW_FLAG_CC;
2382 locate_record(ccw++, (struct LO_eckd_data *) data,
2383 fdata->start_unit, 0, rpt * nr_tracks + 1,
2384 DASD_ECKD_CCW_WRITE_RECORD_ZERO, base,
2385 base->block->bp_block);
2386 data += sizeof(struct LO_eckd_data);
2388 case 0x04: /* Invalidate track. */
2390 prefix(ccw++, (struct PFX_eckd_data *) data,
2391 fdata->start_unit, fdata->stop_unit,
2392 DASD_ECKD_CCW_WRITE_CKD, base, startdev);
2393 data += sizeof(struct PFX_eckd_data);
2395 define_extent(ccw++, (struct DE_eckd_data *) data,
2396 fdata->start_unit, fdata->stop_unit,
2397 DASD_ECKD_CCW_WRITE_CKD, startdev, 0);
2398 data += sizeof(struct DE_eckd_data);
2400 ccw[-1].flags |= CCW_FLAG_CC;
2401 locate_record(ccw++, (struct LO_eckd_data *) data,
2402 fdata->start_unit, 0, 1,
2403 DASD_ECKD_CCW_WRITE_CKD, base, 8);
2404 data += sizeof(struct LO_eckd_data);
2408 for (j = 0; j < nr_tracks; j++) {
2409 /* calculate cylinder and head for the current track */
2411 (fdata->start_unit + j) /
2412 base_priv->rdc_data.trk_per_cyl,
2413 (fdata->start_unit + j) %
2414 base_priv->rdc_data.trk_per_cyl);
2415 if (intensity & 0x01) { /* write record zero */
2416 ect = (struct eckd_count *) data;
2417 data += sizeof(struct eckd_count);
2418 ect->cyl = address.cyl;
2419 ect->head = address.head;
2423 ccw[-1].flags |= CCW_FLAG_CC;
2424 ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO;
2425 ccw->flags = CCW_FLAG_SLI;
2427 ccw->cda = (__u32)(addr_t) ect;
2430 if ((intensity & ~0x08) & 0x04) { /* erase track */
2431 ect = (struct eckd_count *) data;
2432 data += sizeof(struct eckd_count);
2433 ect->cyl = address.cyl;
2434 ect->head = address.head;
2438 ccw[-1].flags |= CCW_FLAG_CC;
2439 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD;
2440 ccw->flags = CCW_FLAG_SLI;
2442 ccw->cda = (__u32)(addr_t) ect;
2443 } else { /* write remaining records */
2444 for (i = 0; i < rpt; i++) {
2445 ect = (struct eckd_count *) data;
2446 data += sizeof(struct eckd_count);
2447 ect->cyl = address.cyl;
2448 ect->head = address.head;
2449 ect->record = i + 1;
2451 ect->dl = fdata->blksize;
2453 * Check for special tracks 0-1
2454 * when formatting CDL
2456 if ((intensity & 0x08) &&
2457 address.cyl == 0 && address.head == 0) {
2460 ect->dl = sizes_trk0[i] - 4;
2463 if ((intensity & 0x08) &&
2464 address.cyl == 0 && address.head == 1) {
2466 ect->dl = LABEL_SIZE - 44;
2468 ccw[-1].flags |= CCW_FLAG_CC;
2469 if (i != 0 || j == 0)
2471 DASD_ECKD_CCW_WRITE_CKD;
2474 DASD_ECKD_CCW_WRITE_CKD_MT;
2475 ccw->flags = CCW_FLAG_SLI;
2477 ccw->cda = (__u32)(addr_t) ect;
2483 fcp->startdev = startdev;
2484 fcp->memdev = startdev;
2485 fcp->basedev = base;
2487 fcp->expires = startdev->default_expires * HZ;
2488 fcp->buildclk = get_tod_clock();
2489 fcp->status = DASD_CQR_FILLED;
2495 * Wrapper function to build a CCW request depending on input data
2497 static struct dasd_ccw_req *
2498 dasd_eckd_format_build_ccw_req(struct dasd_device *base,
2499 struct format_data_t *fdata, int enable_pav,
2500 int tpm, struct eckd_count *fmt_buffer, int rpt)
2502 struct dasd_ccw_req *ccw_req;
2505 ccw_req = dasd_eckd_build_format(base, fdata, enable_pav);
2508 ccw_req = dasd_eckd_build_check_tcw(base, fdata,
2512 ccw_req = dasd_eckd_build_check(base, fdata, enable_pav,
2520 * Sanity checks on format_data
2522 static int dasd_eckd_format_sanity_checks(struct dasd_device *base,
2523 struct format_data_t *fdata)
2525 struct dasd_eckd_private *private = base->private;
2527 if (fdata->start_unit >=
2528 (private->real_cyl * private->rdc_data.trk_per_cyl)) {
2529 dev_warn(&base->cdev->dev,
2530 "Start track number %u used in formatting is too big\n",
2534 if (fdata->stop_unit >=
2535 (private->real_cyl * private->rdc_data.trk_per_cyl)) {
2536 dev_warn(&base->cdev->dev,
2537 "Stop track number %u used in formatting is too big\n",
2541 if (fdata->start_unit > fdata->stop_unit) {
2542 dev_warn(&base->cdev->dev,
2543 "Start track %u used in formatting exceeds end track\n",
2547 if (dasd_check_blocksize(fdata->blksize) != 0) {
2548 dev_warn(&base->cdev->dev,
2549 "The DASD cannot be formatted with block size %u\n",
2557 * This function will process format_data originally coming from an IOCTL
2559 static int dasd_eckd_format_process_data(struct dasd_device *base,
2560 struct format_data_t *fdata,
2561 int enable_pav, int tpm,
2562 struct eckd_count *fmt_buffer, int rpt,
2565 struct dasd_eckd_private *private = base->private;
2566 struct dasd_ccw_req *cqr, *n;
2567 struct list_head format_queue;
2568 struct dasd_device *device;
2570 int old_start, old_stop, format_step;
2574 rc = dasd_eckd_format_sanity_checks(base, fdata);
2578 INIT_LIST_HEAD(&format_queue);
2580 old_start = fdata->start_unit;
2581 old_stop = fdata->stop_unit;
2583 if (!tpm && fmt_buffer != NULL) {
2584 /* Command Mode / Format Check */
2586 } else if (tpm && fmt_buffer != NULL) {
2587 /* Transport Mode / Format Check */
2588 format_step = DASD_CQR_MAX_CCW / rpt;
2590 /* Normal Formatting */
2591 format_step = DASD_CQR_MAX_CCW /
2592 recs_per_track(&private->rdc_data, 0, fdata->blksize);
2597 while (fdata->start_unit <= old_stop) {
2598 step = fdata->stop_unit - fdata->start_unit + 1;
2599 if (step > format_step) {
2601 fdata->start_unit + format_step - 1;
2604 cqr = dasd_eckd_format_build_ccw_req(base, fdata,
2609 if (rc == -ENOMEM) {
2610 if (list_empty(&format_queue))
2613 * not enough memory available, start
2614 * requests retry after first requests
2622 list_add_tail(&cqr->blocklist, &format_queue);
2625 step = fdata->stop_unit - fdata->start_unit + 1;
2626 fmt_buffer += rpt * step;
2628 fdata->start_unit = fdata->stop_unit + 1;
2629 fdata->stop_unit = old_stop;
2632 rc = dasd_sleep_on_queue(&format_queue);
2635 list_for_each_entry_safe(cqr, n, &format_queue, blocklist) {
2636 device = cqr->startdev;
2637 private = device->private;
2639 if (cqr->status == DASD_CQR_FAILED) {
2641 * Only get sense data if called by format
2644 if (fmt_buffer && irb) {
2645 sense = dasd_get_sense(&cqr->irb);
2646 memcpy(irb, &cqr->irb, sizeof(*irb));
2650 list_del_init(&cqr->blocklist);
2651 dasd_sfree_request(cqr, device);
2655 if (rc && rc != -EIO)
2659 * In case fewer than the expected records are on the
2660 * track, we will most likely get a 'No Record Found'
2661 * error (in command mode) or a 'File Protected' error
2662 * (in transport mode). Those particular cases shouldn't
2663 * pass the -EIO to the IOCTL, therefore reset the rc
2667 (sense[1] & SNS1_NO_REC_FOUND ||
2668 sense[1] & SNS1_FILE_PROTECTED))
2677 fdata->start_unit = old_start;
2678 fdata->stop_unit = old_stop;
2683 static int dasd_eckd_format_device(struct dasd_device *base,
2684 struct format_data_t *fdata, int enable_pav)
2686 return dasd_eckd_format_process_data(base, fdata, enable_pav, 0, NULL,
2691 * Helper function to count consecutive records of a single track.
2693 static int dasd_eckd_count_records(struct eckd_count *fmt_buffer, int start,
2699 head = fmt_buffer[start].head;
2702 * There are 3 conditions where we stop counting:
2703 * - if data reoccurs (same head and record may reoccur), which may
2704 * happen due to the way DASD_ECKD_CCW_READ_COUNT works
2705 * - when the head changes, because we're iterating over several tracks
2706 * then (DASD_ECKD_CCW_READ_COUNT_MT)
2707 * - when we've reached the end of sensible data in the buffer (the
2708 * record will be 0 then)
2710 for (i = start; i < max; i++) {
2712 if ((fmt_buffer[i].head == head &&
2713 fmt_buffer[i].record == 1) ||
2714 fmt_buffer[i].head != head ||
2715 fmt_buffer[i].record == 0)
2724 * Evaluate a given range of tracks. Data like number of records, blocksize,
2725 * record ids, and key length are compared with expected data.
2727 * If a mismatch occurs, the corresponding error bit is set, as well as
2728 * additional information, depending on the error.
2730 static void dasd_eckd_format_evaluate_tracks(struct eckd_count *fmt_buffer,
2731 struct format_check_t *cdata,
2732 int rpt_max, int rpt_exp,
2733 int trk_per_cyl, int tpm)
2744 trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1;
2745 max_entries = trkcount * rpt_max;
2747 for (i = cdata->expect.start_unit; i <= cdata->expect.stop_unit; i++) {
2748 /* Calculate the correct next starting position in the buffer */
2750 while (fmt_buffer[pos].record == 0 &&
2751 fmt_buffer[pos].dl == 0) {
2752 if (pos++ > max_entries)
2756 if (i != cdata->expect.start_unit)
2757 pos += rpt_max - count;
2760 /* Calculate the expected geo values for the current track */
2761 set_ch_t(&geo, i / trk_per_cyl, i % trk_per_cyl);
2763 /* Count and check number of records */
2764 count = dasd_eckd_count_records(fmt_buffer, pos, pos + rpt_max);
2766 if (count < rpt_exp) {
2767 cdata->result = DASD_FMT_ERR_TOO_FEW_RECORDS;
2770 if (count > rpt_exp) {
2771 cdata->result = DASD_FMT_ERR_TOO_MANY_RECORDS;
2775 for (j = 0; j < count; j++, pos++) {
2776 blksize = cdata->expect.blksize;
2780 * Set special values when checking CDL formatted
2783 if ((cdata->expect.intensity & 0x08) &&
2784 geo.cyl == 0 && geo.head == 0) {
2786 blksize = sizes_trk0[j] - 4;
2790 if ((cdata->expect.intensity & 0x08) &&
2791 geo.cyl == 0 && geo.head == 1) {
2792 blksize = LABEL_SIZE - 44;
2796 /* Check blocksize */
2797 if (fmt_buffer[pos].dl != blksize) {
2798 cdata->result = DASD_FMT_ERR_BLKSIZE;
2801 /* Check if key length is 0 */
2802 if (fmt_buffer[pos].kl != kl) {
2803 cdata->result = DASD_FMT_ERR_KEY_LENGTH;
2806 /* Check if record_id is correct */
2807 if (fmt_buffer[pos].cyl != geo.cyl ||
2808 fmt_buffer[pos].head != geo.head ||
2809 fmt_buffer[pos].record != (j + 1)) {
2810 cdata->result = DASD_FMT_ERR_RECORD_ID;
2818 * In case of no errors, we need to decrease by one
2819 * to get the correct positions.
2821 if (!cdata->result) {
2827 cdata->num_records = count;
2828 cdata->rec = fmt_buffer[pos].record;
2829 cdata->blksize = fmt_buffer[pos].dl;
2830 cdata->key_length = fmt_buffer[pos].kl;
2834 * Check the format of a range of tracks of a DASD.
2836 static int dasd_eckd_check_device_format(struct dasd_device *base,
2837 struct format_check_t *cdata,
2840 struct dasd_eckd_private *private = base->private;
2841 struct eckd_count *fmt_buffer;
2843 int rpt_max, rpt_exp;
2844 int fmt_buffer_size;
2850 trk_per_cyl = private->rdc_data.trk_per_cyl;
2852 /* Get maximum and expected amount of records per track */
2853 rpt_max = recs_per_track(&private->rdc_data, 0, 512) + 1;
2854 rpt_exp = recs_per_track(&private->rdc_data, 0, cdata->expect.blksize);
2856 trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1;
2857 fmt_buffer_size = trkcount * rpt_max * sizeof(struct eckd_count);
2859 fmt_buffer = kzalloc(fmt_buffer_size, GFP_KERNEL | GFP_DMA);
2864 * A certain FICON feature subset is needed to operate in transport
2865 * mode. Additionally, the support for transport mode is implicitly
2866 * checked by comparing the buffer size with fcx_max_data. As long as
2867 * the buffer size is smaller we can operate in transport mode and
2868 * process multiple tracks. If not, only one track at once is being
2869 * processed using command mode.
2871 if ((private->features.feature[40] & 0x04) &&
2872 fmt_buffer_size <= private->fcx_max_data)
2875 rc = dasd_eckd_format_process_data(base, &cdata->expect, enable_pav,
2876 tpm, fmt_buffer, rpt_max, &irb);
2877 if (rc && rc != -EIO)
2881 * If our first attempt with transport mode enabled comes back
2882 * with an incorrect length error, we're going to retry the
2883 * check with command mode.
2885 if (tpm && scsw_cstat(&irb.scsw) == 0x40) {
2887 rc = dasd_eckd_format_process_data(base, &cdata->expect,
2889 fmt_buffer, rpt_max,
2898 dasd_eckd_format_evaluate_tracks(fmt_buffer, cdata, rpt_max, rpt_exp,
2907 static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr)
2909 if (cqr->retries < 0) {
2910 cqr->status = DASD_CQR_FAILED;
2913 cqr->status = DASD_CQR_FILLED;
2914 if (cqr->block && (cqr->startdev != cqr->block->base)) {
2915 dasd_eckd_reset_ccw_to_base_io(cqr);
2916 cqr->startdev = cqr->block->base;
2917 cqr->lpm = dasd_path_get_opm(cqr->block->base);
2921 static dasd_erp_fn_t
2922 dasd_eckd_erp_action(struct dasd_ccw_req * cqr)
2924 struct dasd_device *device = (struct dasd_device *) cqr->startdev;
2925 struct ccw_device *cdev = device->cdev;
2927 switch (cdev->id.cu_type) {
2932 return dasd_3990_erp_action;
2936 return dasd_default_erp_action;
2940 static dasd_erp_fn_t
2941 dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr)
2943 return dasd_default_erp_postaction;
2946 static void dasd_eckd_check_for_device_change(struct dasd_device *device,
2947 struct dasd_ccw_req *cqr,
2952 struct dasd_eckd_private *private = device->private;
2954 /* first of all check for state change pending interrupt */
2955 mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP;
2956 if ((scsw_dstat(&irb->scsw) & mask) == mask) {
2958 * for alias only, not in offline processing
2959 * and only if not suspended
2961 if (!device->block && private->lcu &&
2962 device->state == DASD_STATE_ONLINE &&
2963 !test_bit(DASD_FLAG_OFFLINE, &device->flags) &&
2964 !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) {
2965 /* schedule worker to reload device */
2966 dasd_reload_device(device);
2968 dasd_generic_handle_state_change(device);
2972 sense = dasd_get_sense(irb);
2976 /* summary unit check */
2977 if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) &&
2978 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) {
2979 if (test_and_set_bit(DASD_FLAG_SUC, &device->flags)) {
2980 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2981 "eckd suc: device already notified");
2984 sense = dasd_get_sense(irb);
2986 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2987 "eckd suc: no reason code available");
2988 clear_bit(DASD_FLAG_SUC, &device->flags);
2992 private->suc_reason = sense[8];
2993 DBF_DEV_EVENT(DBF_NOTICE, device, "%s %x",
2994 "eckd handle summary unit check: reason",
2995 private->suc_reason);
2996 dasd_get_device(device);
2997 if (!schedule_work(&device->suc_work))
2998 dasd_put_device(device);
3003 /* service information message SIM */
3004 if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) &&
3005 ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) {
3006 dasd_3990_erp_handle_sim(device, sense);
3010 /* loss of device reservation is handled via base devices only
3011 * as alias devices may be used with several bases
3013 if (device->block && (sense[27] & DASD_SENSE_BIT_0) &&
3014 (sense[7] == 0x3F) &&
3015 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) &&
3016 test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) {
3017 if (device->features & DASD_FEATURE_FAILONSLCK)
3018 set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags);
3019 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags);
3020 dev_err(&device->cdev->dev,
3021 "The device reservation was lost\n");
3025 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single(
3026 struct dasd_device *startdev,
3027 struct dasd_block *block,
3028 struct request *req,
3033 unsigned int first_offs,
3034 unsigned int last_offs,
3035 unsigned int blk_per_trk,
3036 unsigned int blksize)
3038 struct dasd_eckd_private *private;
3039 unsigned long *idaws;
3040 struct LO_eckd_data *LO_data;
3041 struct dasd_ccw_req *cqr;
3043 struct req_iterator iter;
3047 int count, cidaw, cplength, datasize;
3049 unsigned char cmd, rcmd;
3051 struct dasd_device *basedev;
3053 basedev = block->base;
3054 private = basedev->private;
3055 if (rq_data_dir(req) == READ)
3056 cmd = DASD_ECKD_CCW_READ_MT;
3057 else if (rq_data_dir(req) == WRITE)
3058 cmd = DASD_ECKD_CCW_WRITE_MT;
3060 return ERR_PTR(-EINVAL);
3062 /* Check struct bio and count the number of blocks for the request. */
3065 rq_for_each_segment(bv, req, iter) {
3066 if (bv.bv_len & (blksize - 1))
3067 /* Eckd can only do full blocks. */
3068 return ERR_PTR(-EINVAL);
3069 count += bv.bv_len >> (block->s2b_shift + 9);
3070 if (idal_is_needed (page_address(bv.bv_page), bv.bv_len))
3071 cidaw += bv.bv_len >> (block->s2b_shift + 9);
3074 if (count != last_rec - first_rec + 1)
3075 return ERR_PTR(-EINVAL);
3077 /* use the prefix command if available */
3078 use_prefix = private->features.feature[8] & 0x01;
3080 /* 1x prefix + number of blocks */
3081 cplength = 2 + count;
3082 /* 1x prefix + cidaws*sizeof(long) */
3083 datasize = sizeof(struct PFX_eckd_data) +
3084 sizeof(struct LO_eckd_data) +
3085 cidaw * sizeof(unsigned long);
3087 /* 1x define extent + 1x locate record + number of blocks */
3088 cplength = 2 + count;
3089 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */
3090 datasize = sizeof(struct DE_eckd_data) +
3091 sizeof(struct LO_eckd_data) +
3092 cidaw * sizeof(unsigned long);
3094 /* Find out the number of additional locate record ccws for cdl. */
3095 if (private->uses_cdl && first_rec < 2*blk_per_trk) {
3096 if (last_rec >= 2*blk_per_trk)
3097 count = 2*blk_per_trk - first_rec;
3099 datasize += count*sizeof(struct LO_eckd_data);
3101 /* Allocate the ccw request. */
3102 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
3107 /* First ccw is define extent or prefix. */
3109 if (prefix(ccw++, cqr->data, first_trk,
3110 last_trk, cmd, basedev, startdev) == -EAGAIN) {
3111 /* Clock not in sync and XRC is enabled.
3114 dasd_sfree_request(cqr, startdev);
3115 return ERR_PTR(-EAGAIN);
3117 idaws = (unsigned long *) (cqr->data +
3118 sizeof(struct PFX_eckd_data));
3120 if (define_extent(ccw++, cqr->data, first_trk,
3121 last_trk, cmd, basedev, 0) == -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 DE_eckd_data));
3131 /* Build locate_record+read/write/ccws. */
3132 LO_data = (struct LO_eckd_data *) (idaws + cidaw);
3134 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) {
3135 /* Only standard blocks so there is just one locate record. */
3136 ccw[-1].flags |= CCW_FLAG_CC;
3137 locate_record(ccw++, LO_data++, first_trk, first_offs + 1,
3138 last_rec - recid + 1, cmd, basedev, blksize);
3140 rq_for_each_segment(bv, req, iter) {
3141 dst = page_address(bv.bv_page) + bv.bv_offset;
3142 if (dasd_page_cache) {
3143 char *copy = kmem_cache_alloc(dasd_page_cache,
3144 GFP_DMA | __GFP_NOWARN);
3145 if (copy && rq_data_dir(req) == WRITE)
3146 memcpy(copy + bv.bv_offset, dst, bv.bv_len);
3148 dst = copy + bv.bv_offset;
3150 for (off = 0; off < bv.bv_len; off += blksize) {
3151 sector_t trkid = recid;
3152 unsigned int recoffs = sector_div(trkid, blk_per_trk);
3155 /* Locate record for cdl special block ? */
3156 if (private->uses_cdl && recid < 2*blk_per_trk) {
3157 if (dasd_eckd_cdl_special(blk_per_trk, recid)){
3159 count = dasd_eckd_cdl_reclen(recid);
3160 if (count < blksize &&
3161 rq_data_dir(req) == READ)
3162 memset(dst + count, 0xe5,
3165 ccw[-1].flags |= CCW_FLAG_CC;
3166 locate_record(ccw++, LO_data++,
3168 1, rcmd, basedev, count);
3170 /* Locate record for standard blocks ? */
3171 if (private->uses_cdl && recid == 2*blk_per_trk) {
3172 ccw[-1].flags |= CCW_FLAG_CC;
3173 locate_record(ccw++, LO_data++,
3175 last_rec - recid + 1,
3176 cmd, basedev, count);
3178 /* Read/write ccw. */
3179 ccw[-1].flags |= CCW_FLAG_CC;
3180 ccw->cmd_code = rcmd;
3182 if (idal_is_needed(dst, blksize)) {
3183 ccw->cda = (__u32)(addr_t) idaws;
3184 ccw->flags = CCW_FLAG_IDA;
3185 idaws = idal_create_words(idaws, dst, blksize);
3187 ccw->cda = (__u32)(addr_t) dst;
3195 if (blk_noretry_request(req) ||
3196 block->base->features & DASD_FEATURE_FAILFAST)
3197 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
3198 cqr->startdev = startdev;
3199 cqr->memdev = startdev;
3201 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
3202 cqr->lpm = dasd_path_get_ppm(startdev);
3203 cqr->retries = startdev->default_retries;
3204 cqr->buildclk = get_tod_clock();
3205 cqr->status = DASD_CQR_FILLED;
3209 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track(
3210 struct dasd_device *startdev,
3211 struct dasd_block *block,
3212 struct request *req,
3217 unsigned int first_offs,
3218 unsigned int last_offs,
3219 unsigned int blk_per_trk,
3220 unsigned int blksize)
3222 unsigned long *idaws;
3223 struct dasd_ccw_req *cqr;
3225 struct req_iterator iter;
3227 char *dst, *idaw_dst;
3228 unsigned int cidaw, cplength, datasize;
3232 struct dasd_device *basedev;
3233 unsigned int trkcount, count, count_to_trk_end;
3234 unsigned int idaw_len, seg_len, part_len, len_to_track_end;
3235 unsigned char new_track, end_idaw;
3237 unsigned int recoffs;
3239 basedev = block->base;
3240 if (rq_data_dir(req) == READ)
3241 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
3242 else if (rq_data_dir(req) == WRITE)
3243 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
3245 return ERR_PTR(-EINVAL);
3247 /* Track based I/O needs IDAWs for each page, and not just for
3248 * 64 bit addresses. We need additional idals for pages
3249 * that get filled from two tracks, so we use the number
3250 * of records as upper limit.
3252 cidaw = last_rec - first_rec + 1;
3253 trkcount = last_trk - first_trk + 1;
3255 /* 1x prefix + one read/write ccw per track */
3256 cplength = 1 + trkcount;
3258 datasize = sizeof(struct PFX_eckd_data) + cidaw * sizeof(unsigned long);
3260 /* Allocate the ccw request. */
3261 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
3266 /* transfer length factor: how many bytes to read from the last track */
3267 if (first_trk == last_trk)
3268 tlf = last_offs - first_offs + 1;
3270 tlf = last_offs + 1;
3273 if (prefix_LRE(ccw++, cqr->data, first_trk,
3274 last_trk, cmd, basedev, startdev,
3275 1 /* format */, first_offs + 1,
3278 /* Clock not in sync and XRC is enabled.
3281 dasd_sfree_request(cqr, startdev);
3282 return ERR_PTR(-EAGAIN);
3286 * The translation of request into ccw programs must meet the
3287 * following conditions:
3288 * - all idaws but the first and the last must address full pages
3289 * (or 2K blocks on 31-bit)
3290 * - the scope of a ccw and it's idal ends with the track boundaries
3292 idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data));
3296 len_to_track_end = 0;
3299 rq_for_each_segment(bv, req, iter) {
3300 dst = page_address(bv.bv_page) + bv.bv_offset;
3301 seg_len = bv.bv_len;
3305 recoffs = sector_div(trkid, blk_per_trk);
3306 count_to_trk_end = blk_per_trk - recoffs;
3307 count = min((last_rec - recid + 1),
3308 (sector_t)count_to_trk_end);
3309 len_to_track_end = count * blksize;
3310 ccw[-1].flags |= CCW_FLAG_CC;
3311 ccw->cmd_code = cmd;
3312 ccw->count = len_to_track_end;
3313 ccw->cda = (__u32)(addr_t)idaws;
3314 ccw->flags = CCW_FLAG_IDA;
3318 /* first idaw for a ccw may start anywhere */
3322 /* If we start a new idaw, we must make sure that it
3323 * starts on an IDA_BLOCK_SIZE boundary.
3324 * If we continue an idaw, we must make sure that the
3325 * current segment begins where the so far accumulated
3329 if (__pa(dst) & (IDA_BLOCK_SIZE-1)) {
3330 dasd_sfree_request(cqr, startdev);
3331 return ERR_PTR(-ERANGE);
3335 if ((idaw_dst + idaw_len) != dst) {
3336 dasd_sfree_request(cqr, startdev);
3337 return ERR_PTR(-ERANGE);
3339 part_len = min(seg_len, len_to_track_end);
3340 seg_len -= part_len;
3342 idaw_len += part_len;
3343 len_to_track_end -= part_len;
3344 /* collected memory area ends on an IDA_BLOCK border,
3346 * idal_create_words will handle cases where idaw_len
3347 * is larger then IDA_BLOCK_SIZE
3349 if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1)))
3351 /* We also need to end the idaw at track end */
3352 if (!len_to_track_end) {
3357 idaws = idal_create_words(idaws, idaw_dst,
3366 if (blk_noretry_request(req) ||
3367 block->base->features & DASD_FEATURE_FAILFAST)
3368 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
3369 cqr->startdev = startdev;
3370 cqr->memdev = startdev;
3372 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
3373 cqr->lpm = dasd_path_get_ppm(startdev);
3374 cqr->retries = startdev->default_retries;
3375 cqr->buildclk = get_tod_clock();
3376 cqr->status = DASD_CQR_FILLED;
3380 static int prepare_itcw(struct itcw *itcw,
3381 unsigned int trk, unsigned int totrk, int cmd,
3382 struct dasd_device *basedev,
3383 struct dasd_device *startdev,
3384 unsigned int rec_on_trk, int count,
3385 unsigned int blksize,
3386 unsigned int total_data_size,
3388 unsigned int blk_per_trk)
3390 struct PFX_eckd_data pfxdata;
3391 struct dasd_eckd_private *basepriv, *startpriv;
3392 struct DE_eckd_data *dedata;
3393 struct LRE_eckd_data *lredata;
3397 u16 heads, beghead, endhead;
3405 /* setup prefix data */
3406 basepriv = basedev->private;
3407 startpriv = startdev->private;
3408 dedata = &pfxdata.define_extent;
3409 lredata = &pfxdata.locate_record;
3411 memset(&pfxdata, 0, sizeof(pfxdata));
3412 pfxdata.format = 1; /* PFX with LRE */
3413 pfxdata.base_address = basepriv->ned->unit_addr;
3414 pfxdata.base_lss = basepriv->ned->ID;
3415 pfxdata.validity.define_extent = 1;
3417 /* private uid is kept up to date, conf_data may be outdated */
3418 if (startpriv->uid.type != UA_BASE_DEVICE) {
3419 pfxdata.validity.verify_base = 1;
3420 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS)
3421 pfxdata.validity.hyper_pav = 1;
3425 case DASD_ECKD_CCW_READ_TRACK_DATA:
3426 dedata->mask.perm = 0x1;
3427 dedata->attributes.operation = basepriv->attrib.operation;
3428 dedata->blk_size = blksize;
3429 dedata->ga_extended |= 0x42;
3430 lredata->operation.orientation = 0x0;
3431 lredata->operation.operation = 0x0C;
3432 lredata->auxiliary.check_bytes = 0x01;
3433 pfx_cmd = DASD_ECKD_CCW_PFX_READ;
3435 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
3436 dedata->mask.perm = 0x02;
3437 dedata->attributes.operation = basepriv->attrib.operation;
3438 dedata->blk_size = blksize;
3439 rc = check_XRC(NULL, dedata, basedev);
3440 dedata->ga_extended |= 0x42;
3441 lredata->operation.orientation = 0x0;
3442 lredata->operation.operation = 0x3F;
3443 lredata->extended_operation = 0x23;
3444 lredata->auxiliary.check_bytes = 0x2;
3446 * If XRC is supported the System Time Stamp is set. The
3447 * validity of the time stamp must be reflected in the prefix
3450 if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02)
3451 pfxdata.validity.time_stamp = 1; /* 'Time Stamp Valid' */
3452 pfx_cmd = DASD_ECKD_CCW_PFX;
3454 case DASD_ECKD_CCW_READ_COUNT_MT:
3455 dedata->mask.perm = 0x1;
3456 dedata->attributes.operation = DASD_BYPASS_CACHE;
3457 dedata->ga_extended |= 0x42;
3458 dedata->blk_size = blksize;
3459 lredata->operation.orientation = 0x2;
3460 lredata->operation.operation = 0x16;
3461 lredata->auxiliary.check_bytes = 0x01;
3462 pfx_cmd = DASD_ECKD_CCW_PFX_READ;
3465 DBF_DEV_EVENT(DBF_ERR, basedev,
3466 "prepare itcw, unknown opcode 0x%x", cmd);
3473 dedata->attributes.mode = 0x3; /* ECKD */
3475 heads = basepriv->rdc_data.trk_per_cyl;
3476 begcyl = trk / heads;
3477 beghead = trk % heads;
3478 endcyl = totrk / heads;
3479 endhead = totrk % heads;
3481 /* check for sequential prestage - enhance cylinder range */
3482 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE ||
3483 dedata->attributes.operation == DASD_SEQ_ACCESS) {
3485 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl)
3486 endcyl += basepriv->attrib.nr_cyl;
3488 endcyl = (basepriv->real_cyl - 1);
3491 set_ch_t(&dedata->beg_ext, begcyl, beghead);
3492 set_ch_t(&dedata->end_ext, endcyl, endhead);
3494 dedata->ep_format = 0x20; /* records per track is valid */
3495 dedata->ep_rec_per_track = blk_per_trk;
3498 switch (basepriv->rdc_data.dev_type) {
3500 dn = ceil_quot(blksize + 6, 232);
3501 d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34);
3502 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
3505 d = 7 + ceil_quot(blksize + 12, 32);
3506 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
3511 if (cmd == DASD_ECKD_CCW_READ_COUNT_MT) {
3512 lredata->auxiliary.length_valid = 0;
3513 lredata->auxiliary.length_scope = 0;
3514 lredata->sector = 0xff;
3516 lredata->auxiliary.length_valid = 1;
3517 lredata->auxiliary.length_scope = 1;
3518 lredata->sector = sector;
3520 lredata->auxiliary.imbedded_ccw_valid = 1;
3521 lredata->length = tlf;
3522 lredata->imbedded_ccw = cmd;
3523 lredata->count = count;
3524 set_ch_t(&lredata->seek_addr, begcyl, beghead);
3525 lredata->search_arg.cyl = lredata->seek_addr.cyl;
3526 lredata->search_arg.head = lredata->seek_addr.head;
3527 lredata->search_arg.record = rec_on_trk;
3529 dcw = itcw_add_dcw(itcw, pfx_cmd, 0,
3530 &pfxdata, sizeof(pfxdata), total_data_size);
3531 return PTR_RET(dcw);
3534 static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track(
3535 struct dasd_device *startdev,
3536 struct dasd_block *block,
3537 struct request *req,
3542 unsigned int first_offs,
3543 unsigned int last_offs,
3544 unsigned int blk_per_trk,
3545 unsigned int blksize)
3547 struct dasd_ccw_req *cqr;
3548 struct req_iterator iter;
3551 unsigned int trkcount, ctidaw;
3553 struct dasd_device *basedev;
3556 struct tidaw *last_tidaw = NULL;
3560 unsigned int seg_len, part_len, len_to_track_end;
3561 unsigned char new_track;
3562 sector_t recid, trkid;
3564 unsigned int count, count_to_trk_end;
3567 basedev = block->base;
3568 if (rq_data_dir(req) == READ) {
3569 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
3570 itcw_op = ITCW_OP_READ;
3571 } else if (rq_data_dir(req) == WRITE) {
3572 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
3573 itcw_op = ITCW_OP_WRITE;
3575 return ERR_PTR(-EINVAL);
3577 /* trackbased I/O needs address all memory via TIDAWs,
3578 * not just for 64 bit addresses. This allows us to map
3579 * each segment directly to one tidaw.
3580 * In the case of write requests, additional tidaws may
3581 * be needed when a segment crosses a track boundary.
3583 trkcount = last_trk - first_trk + 1;
3585 rq_for_each_segment(bv, req, iter) {
3588 if (rq_data_dir(req) == WRITE)
3589 ctidaw += (last_trk - first_trk);
3591 /* Allocate the ccw request. */
3592 itcw_size = itcw_calc_size(0, ctidaw, 0);
3593 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev);
3597 /* transfer length factor: how many bytes to read from the last track */
3598 if (first_trk == last_trk)
3599 tlf = last_offs - first_offs + 1;
3601 tlf = last_offs + 1;
3604 itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0);
3609 cqr->cpaddr = itcw_get_tcw(itcw);
3610 if (prepare_itcw(itcw, first_trk, last_trk,
3611 cmd, basedev, startdev,
3614 (last_rec - first_rec + 1) * blksize,
3615 tlf, blk_per_trk) == -EAGAIN) {
3616 /* Clock not in sync and XRC is enabled.
3622 len_to_track_end = 0;
3624 * A tidaw can address 4k of memory, but must not cross page boundaries
3625 * We can let the block layer handle this by setting
3626 * blk_queue_segment_boundary to page boundaries and
3627 * blk_max_segment_size to page size when setting up the request queue.
3628 * For write requests, a TIDAW must not cross track boundaries, because
3629 * we have to set the CBC flag on the last tidaw for each track.
3631 if (rq_data_dir(req) == WRITE) {
3634 rq_for_each_segment(bv, req, iter) {
3635 dst = page_address(bv.bv_page) + bv.bv_offset;
3636 seg_len = bv.bv_len;
3640 offs = sector_div(trkid, blk_per_trk);
3641 count_to_trk_end = blk_per_trk - offs;
3642 count = min((last_rec - recid + 1),
3643 (sector_t)count_to_trk_end);
3644 len_to_track_end = count * blksize;
3648 part_len = min(seg_len, len_to_track_end);
3649 seg_len -= part_len;
3650 len_to_track_end -= part_len;
3651 /* We need to end the tidaw at track end */
3652 if (!len_to_track_end) {
3654 tidaw_flags = TIDAW_FLAGS_INSERT_CBC;
3657 last_tidaw = itcw_add_tidaw(itcw, tidaw_flags,
3659 if (IS_ERR(last_tidaw)) {
3667 rq_for_each_segment(bv, req, iter) {
3668 dst = page_address(bv.bv_page) + bv.bv_offset;
3669 last_tidaw = itcw_add_tidaw(itcw, 0x00,
3671 if (IS_ERR(last_tidaw)) {
3677 last_tidaw->flags |= TIDAW_FLAGS_LAST;
3678 last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC;
3679 itcw_finalize(itcw);
3681 if (blk_noretry_request(req) ||
3682 block->base->features & DASD_FEATURE_FAILFAST)
3683 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
3685 cqr->startdev = startdev;
3686 cqr->memdev = startdev;
3688 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
3689 cqr->lpm = dasd_path_get_ppm(startdev);
3690 cqr->retries = startdev->default_retries;
3691 cqr->buildclk = get_tod_clock();
3692 cqr->status = DASD_CQR_FILLED;
3695 dasd_sfree_request(cqr, startdev);
3696 return ERR_PTR(ret);
3699 static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev,
3700 struct dasd_block *block,
3701 struct request *req)
3706 struct dasd_eckd_private *private;
3707 struct dasd_device *basedev;
3708 sector_t first_rec, last_rec;
3709 sector_t first_trk, last_trk;
3710 unsigned int first_offs, last_offs;
3711 unsigned int blk_per_trk, blksize;
3713 unsigned int data_size;
3714 struct dasd_ccw_req *cqr;
3716 basedev = block->base;
3717 private = basedev->private;
3719 /* Calculate number of blocks/records per track. */
3720 blksize = block->bp_block;
3721 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
3722 if (blk_per_trk == 0)
3723 return ERR_PTR(-EINVAL);
3724 /* Calculate record id of first and last block. */
3725 first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift;
3726 first_offs = sector_div(first_trk, blk_per_trk);
3727 last_rec = last_trk =
3728 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift;
3729 last_offs = sector_div(last_trk, blk_per_trk);
3730 cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk);
3732 fcx_multitrack = private->features.feature[40] & 0x20;
3733 data_size = blk_rq_bytes(req);
3734 if (data_size % blksize)
3735 return ERR_PTR(-EINVAL);
3736 /* tpm write request add CBC data on each track boundary */
3737 if (rq_data_dir(req) == WRITE)
3738 data_size += (last_trk - first_trk) * 4;
3740 /* is read track data and write track data in command mode supported? */
3741 cmdrtd = private->features.feature[9] & 0x20;
3742 cmdwtd = private->features.feature[12] & 0x40;
3743 use_prefix = private->features.feature[8] & 0x01;
3746 if (cdlspecial || dasd_page_cache) {
3747 /* do nothing, just fall through to the cmd mode single case */
3748 } else if ((data_size <= private->fcx_max_data)
3749 && (fcx_multitrack || (first_trk == last_trk))) {
3750 cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req,
3751 first_rec, last_rec,
3752 first_trk, last_trk,
3753 first_offs, last_offs,
3754 blk_per_trk, blksize);
3755 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) &&
3756 (PTR_ERR(cqr) != -ENOMEM))
3758 } else if (use_prefix &&
3759 (((rq_data_dir(req) == READ) && cmdrtd) ||
3760 ((rq_data_dir(req) == WRITE) && cmdwtd))) {
3761 cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req,
3762 first_rec, last_rec,
3763 first_trk, last_trk,
3764 first_offs, last_offs,
3765 blk_per_trk, blksize);
3766 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) &&
3767 (PTR_ERR(cqr) != -ENOMEM))
3771 cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req,
3772 first_rec, last_rec,
3773 first_trk, last_trk,
3774 first_offs, last_offs,
3775 blk_per_trk, blksize);
3779 static struct dasd_ccw_req *dasd_eckd_build_cp_raw(struct dasd_device *startdev,
3780 struct dasd_block *block,
3781 struct request *req)
3783 sector_t start_padding_sectors, end_sector_offset, end_padding_sectors;
3784 unsigned int seg_len, len_to_track_end;
3785 unsigned int cidaw, cplength, datasize;
3786 sector_t first_trk, last_trk, sectors;
3787 struct dasd_eckd_private *base_priv;
3788 struct dasd_device *basedev;
3789 struct req_iterator iter;
3790 struct dasd_ccw_req *cqr;
3791 unsigned int first_offs;
3792 unsigned int trkcount;
3793 unsigned long *idaws;
3803 * raw track access needs to be mutiple of 64k and on 64k boundary
3804 * For read requests we can fix an incorrect alignment by padding
3805 * the request with dummy pages.
3807 start_padding_sectors = blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK;
3808 end_sector_offset = (blk_rq_pos(req) + blk_rq_sectors(req)) %
3809 DASD_RAW_SECTORS_PER_TRACK;
3810 end_padding_sectors = (DASD_RAW_SECTORS_PER_TRACK - end_sector_offset) %
3811 DASD_RAW_SECTORS_PER_TRACK;
3812 basedev = block->base;
3813 if ((start_padding_sectors || end_padding_sectors) &&
3814 (rq_data_dir(req) == WRITE)) {
3815 DBF_DEV_EVENT(DBF_ERR, basedev,
3816 "raw write not track aligned (%lu,%lu) req %p",
3817 start_padding_sectors, end_padding_sectors, req);
3818 return ERR_PTR(-EINVAL);
3821 first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK;
3822 last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) /
3823 DASD_RAW_SECTORS_PER_TRACK;
3824 trkcount = last_trk - first_trk + 1;
3827 if (rq_data_dir(req) == READ)
3828 cmd = DASD_ECKD_CCW_READ_TRACK;
3829 else if (rq_data_dir(req) == WRITE)
3830 cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK;
3832 return ERR_PTR(-EINVAL);
3835 * Raw track based I/O needs IDAWs for each page,
3836 * and not just for 64 bit addresses.
3838 cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK;
3841 * struct PFX_eckd_data and struct LRE_eckd_data can have up to 2 bytes
3842 * of extended parameter. This is needed for write full track.
3844 base_priv = basedev->private;
3845 use_prefix = base_priv->features.feature[8] & 0x01;
3847 cplength = 1 + trkcount;
3848 size = sizeof(struct PFX_eckd_data) + 2;
3850 cplength = 2 + trkcount;
3851 size = sizeof(struct DE_eckd_data) +
3852 sizeof(struct LRE_eckd_data) + 2;
3854 size = ALIGN(size, 8);
3856 datasize = size + cidaw * sizeof(unsigned long);
3858 /* Allocate the ccw request. */
3859 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength,
3860 datasize, startdev);
3868 prefix_LRE(ccw++, data, first_trk, last_trk, cmd, basedev,
3869 startdev, 1, first_offs + 1, trkcount, 0, 0);
3871 define_extent(ccw++, data, first_trk, last_trk, cmd, basedev, 0);
3872 ccw[-1].flags |= CCW_FLAG_CC;
3874 data += sizeof(struct DE_eckd_data);
3875 locate_record_ext(ccw++, data, first_trk, first_offs + 1,
3876 trkcount, cmd, basedev, 0, 0);
3879 idaws = (unsigned long *)(cqr->data + size);
3880 len_to_track_end = 0;
3881 if (start_padding_sectors) {
3882 ccw[-1].flags |= CCW_FLAG_CC;
3883 ccw->cmd_code = cmd;
3884 /* maximum 3390 track size */
3886 /* 64k map to one track */
3887 len_to_track_end = 65536 - start_padding_sectors * 512;
3888 ccw->cda = (__u32)(addr_t)idaws;
3889 ccw->flags |= CCW_FLAG_IDA;
3890 ccw->flags |= CCW_FLAG_SLI;
3892 for (sectors = 0; sectors < start_padding_sectors; sectors += 8)
3893 idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE);
3895 rq_for_each_segment(bv, req, iter) {
3896 dst = page_address(bv.bv_page) + bv.bv_offset;
3897 seg_len = bv.bv_len;
3898 if (cmd == DASD_ECKD_CCW_READ_TRACK)
3899 memset(dst, 0, seg_len);
3900 if (!len_to_track_end) {
3901 ccw[-1].flags |= CCW_FLAG_CC;
3902 ccw->cmd_code = cmd;
3903 /* maximum 3390 track size */
3905 /* 64k map to one track */
3906 len_to_track_end = 65536;
3907 ccw->cda = (__u32)(addr_t)idaws;
3908 ccw->flags |= CCW_FLAG_IDA;
3909 ccw->flags |= CCW_FLAG_SLI;
3912 len_to_track_end -= seg_len;
3913 idaws = idal_create_words(idaws, dst, seg_len);
3915 for (sectors = 0; sectors < end_padding_sectors; sectors += 8)
3916 idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE);
3917 if (blk_noretry_request(req) ||
3918 block->base->features & DASD_FEATURE_FAILFAST)
3919 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
3920 cqr->startdev = startdev;
3921 cqr->memdev = startdev;
3923 cqr->expires = startdev->default_expires * HZ;
3924 cqr->lpm = dasd_path_get_ppm(startdev);
3925 cqr->retries = startdev->default_retries;
3926 cqr->buildclk = get_tod_clock();
3927 cqr->status = DASD_CQR_FILLED;
3934 dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req)
3936 struct dasd_eckd_private *private;
3938 struct req_iterator iter;
3941 unsigned int blksize, blk_per_trk, off;
3945 if (!dasd_page_cache)
3947 private = cqr->block->base->private;
3948 blksize = cqr->block->bp_block;
3949 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
3950 recid = blk_rq_pos(req) >> cqr->block->s2b_shift;
3952 /* Skip over define extent & locate record. */
3954 if (private->uses_cdl == 0 || recid > 2*blk_per_trk)
3956 rq_for_each_segment(bv, req, iter) {
3957 dst = page_address(bv.bv_page) + bv.bv_offset;
3958 for (off = 0; off < bv.bv_len; off += blksize) {
3959 /* Skip locate record. */
3960 if (private->uses_cdl && recid <= 2*blk_per_trk)
3963 if (ccw->flags & CCW_FLAG_IDA)
3964 cda = *((char **)((addr_t) ccw->cda));
3966 cda = (char *)((addr_t) ccw->cda);
3968 if (rq_data_dir(req) == READ)
3969 memcpy(dst, cda, bv.bv_len);
3970 kmem_cache_free(dasd_page_cache,
3971 (void *)((addr_t)cda & PAGE_MASK));
3980 status = cqr->status == DASD_CQR_DONE;
3981 dasd_sfree_request(cqr, cqr->memdev);
3986 * Modify ccw/tcw in cqr so it can be started on a base device.
3988 * Note that this is not enough to restart the cqr!
3989 * Either reset cqr->startdev as well (summary unit check handling)
3990 * or restart via separate cqr (as in ERP handling).
3992 void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr)
3995 struct PFX_eckd_data *pfxdata;
4000 if (cqr->cpmode == 1) {
4002 tccb = tcw_get_tccb(tcw);
4003 dcw = (struct dcw *)&tccb->tca[0];
4004 pfxdata = (struct PFX_eckd_data *)&dcw->cd[0];
4005 pfxdata->validity.verify_base = 0;
4006 pfxdata->validity.hyper_pav = 0;
4009 pfxdata = cqr->data;
4010 if (ccw->cmd_code == DASD_ECKD_CCW_PFX) {
4011 pfxdata->validity.verify_base = 0;
4012 pfxdata->validity.hyper_pav = 0;
4017 #define DASD_ECKD_CHANQ_MAX_SIZE 4
4019 static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base,
4020 struct dasd_block *block,
4021 struct request *req)
4023 struct dasd_eckd_private *private;
4024 struct dasd_device *startdev;
4025 unsigned long flags;
4026 struct dasd_ccw_req *cqr;
4028 startdev = dasd_alias_get_start_dev(base);
4031 private = startdev->private;
4032 if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE)
4033 return ERR_PTR(-EBUSY);
4035 spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags);
4037 if ((base->features & DASD_FEATURE_USERAW))
4038 cqr = dasd_eckd_build_cp_raw(startdev, block, req);
4040 cqr = dasd_eckd_build_cp(startdev, block, req);
4043 spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags);
4047 static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr,
4048 struct request *req)
4050 struct dasd_eckd_private *private;
4051 unsigned long flags;
4053 spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags);
4054 private = cqr->memdev->private;
4056 spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags);
4057 return dasd_eckd_free_cp(cqr, req);
4061 dasd_eckd_fill_info(struct dasd_device * device,
4062 struct dasd_information2_t * info)
4064 struct dasd_eckd_private *private = device->private;
4066 info->label_block = 2;
4067 info->FBA_layout = private->uses_cdl ? 0 : 1;
4068 info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL;
4069 info->characteristics_size = sizeof(private->rdc_data);
4070 memcpy(info->characteristics, &private->rdc_data,
4071 sizeof(private->rdc_data));
4072 info->confdata_size = min((unsigned long)private->conf_len,
4073 sizeof(info->configuration_data));
4074 memcpy(info->configuration_data, private->conf_data,
4075 info->confdata_size);
4080 * SECTION: ioctl functions for eckd devices.
4084 * Release device ioctl.
4085 * Buils a channel programm to releases a prior reserved
4086 * (see dasd_eckd_reserve) device.
4089 dasd_eckd_release(struct dasd_device *device)
4091 struct dasd_ccw_req *cqr;
4096 if (!capable(CAP_SYS_ADMIN))
4100 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
4102 mutex_lock(&dasd_reserve_mutex);
4104 cqr = &dasd_reserve_req->cqr;
4105 memset(cqr, 0, sizeof(*cqr));
4106 memset(&dasd_reserve_req->ccw, 0,
4107 sizeof(dasd_reserve_req->ccw));
4108 cqr->cpaddr = &dasd_reserve_req->ccw;
4109 cqr->data = &dasd_reserve_req->data;
4110 cqr->magic = DASD_ECKD_MAGIC;
4113 ccw->cmd_code = DASD_ECKD_CCW_RELEASE;
4114 ccw->flags |= CCW_FLAG_SLI;
4116 ccw->cda = (__u32)(addr_t) cqr->data;
4117 cqr->startdev = device;
4118 cqr->memdev = device;
4119 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
4120 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
4121 cqr->retries = 2; /* set retry counter to enable basic ERP */
4122 cqr->expires = 2 * HZ;
4123 cqr->buildclk = get_tod_clock();
4124 cqr->status = DASD_CQR_FILLED;
4126 rc = dasd_sleep_on_immediatly(cqr);
4128 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags);
4131 mutex_unlock(&dasd_reserve_mutex);
4133 dasd_sfree_request(cqr, cqr->memdev);
4138 * Reserve device ioctl.
4139 * Options are set to 'synchronous wait for interrupt' and
4140 * 'timeout the request'. This leads to a terminate IO if
4141 * the interrupt is outstanding for a certain time.
4144 dasd_eckd_reserve(struct dasd_device *device)
4146 struct dasd_ccw_req *cqr;
4151 if (!capable(CAP_SYS_ADMIN))
4155 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
4157 mutex_lock(&dasd_reserve_mutex);
4159 cqr = &dasd_reserve_req->cqr;
4160 memset(cqr, 0, sizeof(*cqr));
4161 memset(&dasd_reserve_req->ccw, 0,
4162 sizeof(dasd_reserve_req->ccw));
4163 cqr->cpaddr = &dasd_reserve_req->ccw;
4164 cqr->data = &dasd_reserve_req->data;
4165 cqr->magic = DASD_ECKD_MAGIC;
4168 ccw->cmd_code = DASD_ECKD_CCW_RESERVE;
4169 ccw->flags |= CCW_FLAG_SLI;
4171 ccw->cda = (__u32)(addr_t) cqr->data;
4172 cqr->startdev = device;
4173 cqr->memdev = device;
4174 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
4175 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
4176 cqr->retries = 2; /* set retry counter to enable basic ERP */
4177 cqr->expires = 2 * HZ;
4178 cqr->buildclk = get_tod_clock();
4179 cqr->status = DASD_CQR_FILLED;
4181 rc = dasd_sleep_on_immediatly(cqr);
4183 set_bit(DASD_FLAG_IS_RESERVED, &device->flags);
4186 mutex_unlock(&dasd_reserve_mutex);
4188 dasd_sfree_request(cqr, cqr->memdev);
4193 * Steal lock ioctl - unconditional reserve device.
4194 * Buils a channel programm to break a device's reservation.
4195 * (unconditional reserve)
4198 dasd_eckd_steal_lock(struct dasd_device *device)
4200 struct dasd_ccw_req *cqr;
4205 if (!capable(CAP_SYS_ADMIN))
4209 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
4211 mutex_lock(&dasd_reserve_mutex);
4213 cqr = &dasd_reserve_req->cqr;
4214 memset(cqr, 0, sizeof(*cqr));
4215 memset(&dasd_reserve_req->ccw, 0,
4216 sizeof(dasd_reserve_req->ccw));
4217 cqr->cpaddr = &dasd_reserve_req->ccw;
4218 cqr->data = &dasd_reserve_req->data;
4219 cqr->magic = DASD_ECKD_MAGIC;
4222 ccw->cmd_code = DASD_ECKD_CCW_SLCK;
4223 ccw->flags |= CCW_FLAG_SLI;
4225 ccw->cda = (__u32)(addr_t) cqr->data;
4226 cqr->startdev = device;
4227 cqr->memdev = device;
4228 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
4229 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
4230 cqr->retries = 2; /* set retry counter to enable basic ERP */
4231 cqr->expires = 2 * HZ;
4232 cqr->buildclk = get_tod_clock();
4233 cqr->status = DASD_CQR_FILLED;
4235 rc = dasd_sleep_on_immediatly(cqr);
4237 set_bit(DASD_FLAG_IS_RESERVED, &device->flags);
4240 mutex_unlock(&dasd_reserve_mutex);
4242 dasd_sfree_request(cqr, cqr->memdev);
4247 * SNID - Sense Path Group ID
4248 * This ioctl may be used in situations where I/O is stalled due to
4249 * a reserve, so if the normal dasd_smalloc_request fails, we use the
4250 * preallocated dasd_reserve_req.
4252 static int dasd_eckd_snid(struct dasd_device *device,
4255 struct dasd_ccw_req *cqr;
4259 struct dasd_snid_ioctl_data usrparm;
4261 if (!capable(CAP_SYS_ADMIN))
4264 if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
4268 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1,
4269 sizeof(struct dasd_snid_data), device);
4271 mutex_lock(&dasd_reserve_mutex);
4273 cqr = &dasd_reserve_req->cqr;
4274 memset(cqr, 0, sizeof(*cqr));
4275 memset(&dasd_reserve_req->ccw, 0,
4276 sizeof(dasd_reserve_req->ccw));
4277 cqr->cpaddr = &dasd_reserve_req->ccw;
4278 cqr->data = &dasd_reserve_req->data;
4279 cqr->magic = DASD_ECKD_MAGIC;
4282 ccw->cmd_code = DASD_ECKD_CCW_SNID;
4283 ccw->flags |= CCW_FLAG_SLI;
4285 ccw->cda = (__u32)(addr_t) cqr->data;
4286 cqr->startdev = device;
4287 cqr->memdev = device;
4288 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
4289 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
4290 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags);
4292 cqr->expires = 10 * HZ;
4293 cqr->buildclk = get_tod_clock();
4294 cqr->status = DASD_CQR_FILLED;
4295 cqr->lpm = usrparm.path_mask;
4297 rc = dasd_sleep_on_immediatly(cqr);
4298 /* verify that I/O processing didn't modify the path mask */
4299 if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask))
4302 usrparm.data = *((struct dasd_snid_data *)cqr->data);
4303 if (copy_to_user(argp, &usrparm, sizeof(usrparm)))
4308 mutex_unlock(&dasd_reserve_mutex);
4310 dasd_sfree_request(cqr, cqr->memdev);
4315 * Read performance statistics
4318 dasd_eckd_performance(struct dasd_device *device, void __user *argp)
4320 struct dasd_psf_prssd_data *prssdp;
4321 struct dasd_rssd_perf_stats_t *stats;
4322 struct dasd_ccw_req *cqr;
4326 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
4327 (sizeof(struct dasd_psf_prssd_data) +
4328 sizeof(struct dasd_rssd_perf_stats_t)),
4331 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
4332 "Could not allocate initialization request");
4333 return PTR_ERR(cqr);
4335 cqr->startdev = device;
4336 cqr->memdev = device;
4338 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
4339 cqr->expires = 10 * HZ;
4341 /* Prepare for Read Subsystem Data */
4342 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
4343 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
4344 prssdp->order = PSF_ORDER_PRSSD;
4345 prssdp->suborder = 0x01; /* Performance Statistics */
4346 prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */
4349 ccw->cmd_code = DASD_ECKD_CCW_PSF;
4350 ccw->count = sizeof(struct dasd_psf_prssd_data);
4351 ccw->flags |= CCW_FLAG_CC;
4352 ccw->cda = (__u32)(addr_t) prssdp;
4354 /* Read Subsystem Data - Performance Statistics */
4355 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
4356 memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t));
4359 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
4360 ccw->count = sizeof(struct dasd_rssd_perf_stats_t);
4361 ccw->cda = (__u32)(addr_t) stats;
4363 cqr->buildclk = get_tod_clock();
4364 cqr->status = DASD_CQR_FILLED;
4365 rc = dasd_sleep_on(cqr);
4367 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
4368 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
4369 if (copy_to_user(argp, stats,
4370 sizeof(struct dasd_rssd_perf_stats_t)))
4373 dasd_sfree_request(cqr, cqr->memdev);
4378 * Get attributes (cache operations)
4379 * Returnes the cache attributes used in Define Extend (DE).
4382 dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp)
4384 struct dasd_eckd_private *private = device->private;
4385 struct attrib_data_t attrib = private->attrib;
4388 if (!capable(CAP_SYS_ADMIN))
4394 if (copy_to_user(argp, (long *) &attrib,
4395 sizeof(struct attrib_data_t)))
4402 * Set attributes (cache operations)
4403 * Stores the attributes for cache operation to be used in Define Extend (DE).
4406 dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp)
4408 struct dasd_eckd_private *private = device->private;
4409 struct attrib_data_t attrib;
4411 if (!capable(CAP_SYS_ADMIN))
4416 if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t)))
4418 private->attrib = attrib;
4420 dev_info(&device->cdev->dev,
4421 "The DASD cache mode was set to %x (%i cylinder prestage)\n",
4422 private->attrib.operation, private->attrib.nr_cyl);
4427 * Issue syscall I/O to EMC Symmetrix array.
4428 * CCWs are PSF and RSSD
4430 static int dasd_symm_io(struct dasd_device *device, void __user *argp)
4432 struct dasd_symmio_parms usrparm;
4433 char *psf_data, *rssd_result;
4434 struct dasd_ccw_req *cqr;
4439 if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
4443 /* Copy parms from caller */
4445 if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
4447 if (is_compat_task()) {
4448 /* Make sure pointers are sane even on 31 bit. */
4450 if ((usrparm.psf_data >> 32) != 0)
4452 if ((usrparm.rssd_result >> 32) != 0)
4454 usrparm.psf_data &= 0x7fffffffULL;
4455 usrparm.rssd_result &= 0x7fffffffULL;
4457 /* alloc I/O data area */
4458 psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA);
4459 rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA);
4460 if (!psf_data || !rssd_result) {
4465 /* get syscall header from user space */
4467 if (copy_from_user(psf_data,
4468 (void __user *)(unsigned long) usrparm.psf_data,
4469 usrparm.psf_data_len))
4474 /* setup CCWs for PSF + RSSD */
4475 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device);
4477 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
4478 "Could not allocate initialization request");
4483 cqr->startdev = device;
4484 cqr->memdev = device;
4486 cqr->expires = 10 * HZ;
4487 cqr->buildclk = get_tod_clock();
4488 cqr->status = DASD_CQR_FILLED;
4490 /* Build the ccws */
4494 ccw->cmd_code = DASD_ECKD_CCW_PSF;
4495 ccw->count = usrparm.psf_data_len;
4496 ccw->flags |= CCW_FLAG_CC;
4497 ccw->cda = (__u32)(addr_t) psf_data;
4502 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
4503 ccw->count = usrparm.rssd_result_len;
4504 ccw->flags = CCW_FLAG_SLI ;
4505 ccw->cda = (__u32)(addr_t) rssd_result;
4507 rc = dasd_sleep_on(cqr);
4512 if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result,
4513 rssd_result, usrparm.rssd_result_len))
4518 dasd_sfree_request(cqr, cqr->memdev);
4523 DBF_DEV_EVENT(DBF_WARNING, device,
4524 "Symmetrix ioctl (0x%02x 0x%02x): rc=%d",
4525 (int) psf0, (int) psf1, rc);
4530 dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp)
4532 struct dasd_device *device = block->base;
4536 return dasd_eckd_get_attrib(device, argp);
4538 return dasd_eckd_set_attrib(device, argp);
4540 return dasd_eckd_performance(device, argp);
4542 return dasd_eckd_release(device);
4544 return dasd_eckd_reserve(device);
4546 return dasd_eckd_steal_lock(device);
4548 return dasd_eckd_snid(device, argp);
4550 return dasd_symm_io(device, argp);
4557 * Dump the range of CCWs into 'page' buffer
4558 * and return number of printed chars.
4561 dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page)
4567 while (from <= to) {
4568 len += sprintf(page + len, PRINTK_HEADER
4569 " CCW %p: %08X %08X DAT:",
4570 from, ((int *) from)[0], ((int *) from)[1]);
4572 /* get pointer to data (consider IDALs) */
4573 if (from->flags & CCW_FLAG_IDA)
4574 datap = (char *) *((addr_t *) (addr_t) from->cda);
4576 datap = (char *) ((addr_t) from->cda);
4578 /* dump data (max 32 bytes) */
4579 for (count = 0; count < from->count && count < 32; count++) {
4580 if (count % 8 == 0) len += sprintf(page + len, " ");
4581 if (count % 4 == 0) len += sprintf(page + len, " ");
4582 len += sprintf(page + len, "%02x", datap[count]);
4584 len += sprintf(page + len, "\n");
4591 dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb,
4597 sense = (u64 *) dasd_get_sense(irb);
4598 stat = (u64 *) &irb->scsw;
4600 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : "
4601 "%016llx %016llx %016llx %016llx",
4602 reason, *stat, *((u32 *) (stat + 1)),
4603 sense[0], sense[1], sense[2], sense[3]);
4605 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s",
4606 reason, *stat, *((u32 *) (stat + 1)),
4612 * Print sense data and related channel program.
4613 * Parts are printed because printk buffer is only 1024 bytes.
4615 static void dasd_eckd_dump_sense_ccw(struct dasd_device *device,
4616 struct dasd_ccw_req *req, struct irb *irb)
4619 struct ccw1 *first, *last, *fail, *from, *to;
4622 page = (char *) get_zeroed_page(GFP_ATOMIC);
4624 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
4625 "No memory to dump sense data\n");
4628 /* dump the sense data */
4629 len = sprintf(page, PRINTK_HEADER
4630 " I/O status report for device %s:\n",
4631 dev_name(&device->cdev->dev));
4632 len += sprintf(page + len, PRINTK_HEADER
4633 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X "
4635 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw),
4636 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw),
4637 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw),
4638 req ? req->intrc : 0);
4639 len += sprintf(page + len, PRINTK_HEADER
4640 " device %s: Failing CCW: %p\n",
4641 dev_name(&device->cdev->dev),
4642 (void *) (addr_t) irb->scsw.cmd.cpa);
4643 if (irb->esw.esw0.erw.cons) {
4644 for (sl = 0; sl < 4; sl++) {
4645 len += sprintf(page + len, PRINTK_HEADER
4646 " Sense(hex) %2d-%2d:",
4647 (8 * sl), ((8 * sl) + 7));
4649 for (sct = 0; sct < 8; sct++) {
4650 len += sprintf(page + len, " %02x",
4651 irb->ecw[8 * sl + sct]);
4653 len += sprintf(page + len, "\n");
4656 if (irb->ecw[27] & DASD_SENSE_BIT_0) {
4657 /* 24 Byte Sense Data */
4658 sprintf(page + len, PRINTK_HEADER
4659 " 24 Byte: %x MSG %x, "
4660 "%s MSGb to SYSOP\n",
4661 irb->ecw[7] >> 4, irb->ecw[7] & 0x0f,
4662 irb->ecw[1] & 0x10 ? "" : "no");
4664 /* 32 Byte Sense Data */
4665 sprintf(page + len, PRINTK_HEADER
4666 " 32 Byte: Format: %x "
4667 "Exception class %x\n",
4668 irb->ecw[6] & 0x0f, irb->ecw[22] >> 4);
4671 sprintf(page + len, PRINTK_HEADER
4672 " SORRY - NO VALID SENSE AVAILABLE\n");
4674 printk(KERN_ERR "%s", page);
4677 /* req == NULL for unsolicited interrupts */
4678 /* dump the Channel Program (max 140 Bytes per line) */
4679 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */
4680 first = req->cpaddr;
4681 for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++);
4682 to = min(first + 6, last);
4683 len = sprintf(page, PRINTK_HEADER
4684 " Related CP in req: %p\n", req);
4685 dasd_eckd_dump_ccw_range(first, to, page + len);
4686 printk(KERN_ERR "%s", page);
4688 /* print failing CCW area (maximum 4) */
4689 /* scsw->cda is either valid or zero */
4692 fail = (struct ccw1 *)(addr_t)
4693 irb->scsw.cmd.cpa; /* failing CCW */
4694 if (from < fail - 2) {
4695 from = fail - 2; /* there is a gap - print header */
4696 len += sprintf(page, PRINTK_HEADER "......\n");
4698 to = min(fail + 1, last);
4699 len += dasd_eckd_dump_ccw_range(from, to, page + len);
4701 /* print last CCWs (maximum 2) */
4702 from = max(from, ++to);
4703 if (from < last - 1) {
4704 from = last - 1; /* there is a gap - print header */
4705 len += sprintf(page + len, PRINTK_HEADER "......\n");
4707 len += dasd_eckd_dump_ccw_range(from, last, page + len);
4709 printk(KERN_ERR "%s", page);
4711 free_page((unsigned long) page);
4716 * Print sense data from a tcw.
4718 static void dasd_eckd_dump_sense_tcw(struct dasd_device *device,
4719 struct dasd_ccw_req *req, struct irb *irb)
4722 int len, sl, sct, residual;
4726 page = (char *) get_zeroed_page(GFP_ATOMIC);
4728 DBF_DEV_EVENT(DBF_WARNING, device, " %s",
4729 "No memory to dump sense data");
4732 /* dump the sense data */
4733 len = sprintf(page, PRINTK_HEADER
4734 " I/O status report for device %s:\n",
4735 dev_name(&device->cdev->dev));
4736 len += sprintf(page + len, PRINTK_HEADER
4737 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X "
4738 "CS:%02X fcxs:%02X schxs:%02X RC:%d\n",
4739 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw),
4740 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw),
4741 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw),
4743 (irb->scsw.tm.ifob << 7) | irb->scsw.tm.sesq,
4744 req ? req->intrc : 0);
4745 len += sprintf(page + len, PRINTK_HEADER
4746 " device %s: Failing TCW: %p\n",
4747 dev_name(&device->cdev->dev),
4748 (void *) (addr_t) irb->scsw.tm.tcw);
4752 if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01))
4754 (struct tcw *)(unsigned long)irb->scsw.tm.tcw);
4757 len += sprintf(page + len, PRINTK_HEADER
4758 " tsb->length %d\n", tsb->length);
4759 len += sprintf(page + len, PRINTK_HEADER
4760 " tsb->flags %x\n", tsb->flags);
4761 len += sprintf(page + len, PRINTK_HEADER
4762 " tsb->dcw_offset %d\n", tsb->dcw_offset);
4763 len += sprintf(page + len, PRINTK_HEADER
4764 " tsb->count %d\n", tsb->count);
4765 residual = tsb->count - 28;
4766 len += sprintf(page + len, PRINTK_HEADER
4767 " residual %d\n", residual);
4769 switch (tsb->flags & 0x07) {
4770 case 1: /* tsa_iostat */
4771 len += sprintf(page + len, PRINTK_HEADER
4772 " tsb->tsa.iostat.dev_time %d\n",
4773 tsb->tsa.iostat.dev_time);
4774 len += sprintf(page + len, PRINTK_HEADER
4775 " tsb->tsa.iostat.def_time %d\n",
4776 tsb->tsa.iostat.def_time);
4777 len += sprintf(page + len, PRINTK_HEADER
4778 " tsb->tsa.iostat.queue_time %d\n",
4779 tsb->tsa.iostat.queue_time);
4780 len += sprintf(page + len, PRINTK_HEADER
4781 " tsb->tsa.iostat.dev_busy_time %d\n",
4782 tsb->tsa.iostat.dev_busy_time);
4783 len += sprintf(page + len, PRINTK_HEADER
4784 " tsb->tsa.iostat.dev_act_time %d\n",
4785 tsb->tsa.iostat.dev_act_time);
4786 sense = tsb->tsa.iostat.sense;
4788 case 2: /* ts_ddpc */
4789 len += sprintf(page + len, PRINTK_HEADER
4790 " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc);
4791 for (sl = 0; sl < 2; sl++) {
4792 len += sprintf(page + len, PRINTK_HEADER
4793 " tsb->tsa.ddpc.rcq %2d-%2d: ",
4794 (8 * sl), ((8 * sl) + 7));
4795 rcq = tsb->tsa.ddpc.rcq;
4796 for (sct = 0; sct < 8; sct++) {
4797 len += sprintf(page + len, " %02x",
4800 len += sprintf(page + len, "\n");
4802 sense = tsb->tsa.ddpc.sense;
4804 case 3: /* tsa_intrg */
4805 len += sprintf(page + len, PRINTK_HEADER
4806 " tsb->tsa.intrg.: not supported yet\n");
4811 for (sl = 0; sl < 4; sl++) {
4812 len += sprintf(page + len, PRINTK_HEADER
4813 " Sense(hex) %2d-%2d:",
4814 (8 * sl), ((8 * sl) + 7));
4815 for (sct = 0; sct < 8; sct++) {
4816 len += sprintf(page + len, " %02x",
4817 sense[8 * sl + sct]);
4819 len += sprintf(page + len, "\n");
4822 if (sense[27] & DASD_SENSE_BIT_0) {
4823 /* 24 Byte Sense Data */
4824 sprintf(page + len, PRINTK_HEADER
4825 " 24 Byte: %x MSG %x, "
4826 "%s MSGb to SYSOP\n",
4827 sense[7] >> 4, sense[7] & 0x0f,
4828 sense[1] & 0x10 ? "" : "no");
4830 /* 32 Byte Sense Data */
4831 sprintf(page + len, PRINTK_HEADER
4832 " 32 Byte: Format: %x "
4833 "Exception class %x\n",
4834 sense[6] & 0x0f, sense[22] >> 4);
4837 sprintf(page + len, PRINTK_HEADER
4838 " SORRY - NO VALID SENSE AVAILABLE\n");
4841 sprintf(page + len, PRINTK_HEADER
4842 " SORRY - NO TSB DATA AVAILABLE\n");
4844 printk(KERN_ERR "%s", page);
4845 free_page((unsigned long) page);
4848 static void dasd_eckd_dump_sense(struct dasd_device *device,
4849 struct dasd_ccw_req *req, struct irb *irb)
4851 u8 *sense = dasd_get_sense(irb);
4853 if (scsw_is_tm(&irb->scsw)) {
4855 * In some cases the 'File Protected' or 'Incorrect Length'
4856 * error might be expected and log messages shouldn't be written
4857 * then. Check if the according suppress bit is set.
4859 if (sense && (sense[1] & SNS1_FILE_PROTECTED) &&
4860 test_bit(DASD_CQR_SUPPRESS_FP, &req->flags))
4862 if (scsw_cstat(&irb->scsw) == 0x40 &&
4863 test_bit(DASD_CQR_SUPPRESS_IL, &req->flags))
4866 dasd_eckd_dump_sense_tcw(device, req, irb);
4869 * In some cases the 'Command Reject' or 'No Record Found'
4870 * error might be expected and log messages shouldn't be
4871 * written then. Check if the according suppress bit is set.
4873 if (sense && sense[0] & SNS0_CMD_REJECT &&
4874 test_bit(DASD_CQR_SUPPRESS_CR, &req->flags))
4877 if (sense && sense[1] & SNS1_NO_REC_FOUND &&
4878 test_bit(DASD_CQR_SUPPRESS_NRF, &req->flags))
4881 dasd_eckd_dump_sense_ccw(device, req, irb);
4885 static int dasd_eckd_pm_freeze(struct dasd_device *device)
4888 * the device should be disconnected from our LCU structure
4889 * on restore we will reconnect it and reread LCU specific
4890 * information like PAV support that might have changed
4892 dasd_alias_remove_device(device);
4893 dasd_alias_disconnect_device_from_lcu(device);
4898 static int dasd_eckd_restore_device(struct dasd_device *device)
4900 struct dasd_eckd_private *private = device->private;
4901 struct dasd_eckd_characteristics temp_rdc_data;
4903 struct dasd_uid temp_uid;
4904 unsigned long flags;
4905 unsigned long cqr_flags = 0;
4907 /* Read Configuration Data */
4908 rc = dasd_eckd_read_conf(device);
4910 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
4911 "Read configuration data failed, rc=%d", rc);
4915 dasd_eckd_get_uid(device, &temp_uid);
4916 /* Generate device unique id */
4917 rc = dasd_eckd_generate_uid(device);
4918 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
4919 if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0)
4920 dev_err(&device->cdev->dev, "The UID of the DASD has "
4922 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
4926 /* register lcu with alias handling, enable PAV if this is a new lcu */
4927 rc = dasd_alias_make_device_known_to_lcu(device);
4931 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags);
4932 dasd_eckd_validate_server(device, cqr_flags);
4934 /* RE-Read Configuration Data */
4935 rc = dasd_eckd_read_conf(device);
4937 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
4938 "Read configuration data failed, rc=%d", rc);
4942 /* Read Feature Codes */
4943 dasd_eckd_read_features(device);
4945 /* Read Device Characteristics */
4946 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
4947 &temp_rdc_data, 64);
4949 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
4950 "Read device characteristic failed, rc=%d", rc);
4953 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
4954 memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data));
4955 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
4957 /* add device to alias management */
4958 dasd_alias_add_device(device);
4963 dasd_alias_disconnect_device_from_lcu(device);
4968 static int dasd_eckd_reload_device(struct dasd_device *device)
4970 struct dasd_eckd_private *private = device->private;
4973 struct dasd_uid uid;
4974 unsigned long flags;
4977 * remove device from alias handling to prevent new requests
4978 * from being scheduled on the wrong alias device
4980 dasd_alias_remove_device(device);
4982 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
4983 old_base = private->uid.base_unit_addr;
4984 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
4986 /* Read Configuration Data */
4987 rc = dasd_eckd_read_conf(device);
4991 rc = dasd_eckd_generate_uid(device);
4995 * update unit address configuration and
4996 * add device to alias management
4998 dasd_alias_update_add_device(device);
5000 dasd_eckd_get_uid(device, &uid);
5002 if (old_base != uid.base_unit_addr) {
5003 if (strlen(uid.vduit) > 0)
5004 snprintf(print_uid, sizeof(print_uid),
5005 "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial,
5006 uid.ssid, uid.base_unit_addr, uid.vduit);
5008 snprintf(print_uid, sizeof(print_uid),
5009 "%s.%s.%04x.%02x", uid.vendor, uid.serial,
5010 uid.ssid, uid.base_unit_addr);
5012 dev_info(&device->cdev->dev,
5013 "An Alias device was reassigned to a new base device "
5014 "with UID: %s\n", print_uid);
5022 static int dasd_eckd_read_message_buffer(struct dasd_device *device,
5023 struct dasd_rssd_messages *messages,
5026 struct dasd_rssd_messages *message_buf;
5027 struct dasd_psf_prssd_data *prssdp;
5028 struct dasd_ccw_req *cqr;
5032 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
5033 (sizeof(struct dasd_psf_prssd_data) +
5034 sizeof(struct dasd_rssd_messages)),
5037 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
5038 "Could not allocate read message buffer request");
5039 return PTR_ERR(cqr);
5044 cqr->startdev = device;
5045 cqr->memdev = device;
5047 cqr->expires = 10 * HZ;
5048 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags);
5049 /* dasd_sleep_on_immediatly does not do complex error
5050 * recovery so clear erp flag and set retry counter to
5052 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
5055 /* Prepare for Read Subsystem Data */
5056 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
5057 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
5058 prssdp->order = PSF_ORDER_PRSSD;
5059 prssdp->suborder = 0x03; /* Message Buffer */
5060 /* all other bytes of prssdp must be zero */
5063 ccw->cmd_code = DASD_ECKD_CCW_PSF;
5064 ccw->count = sizeof(struct dasd_psf_prssd_data);
5065 ccw->flags |= CCW_FLAG_CC;
5066 ccw->flags |= CCW_FLAG_SLI;
5067 ccw->cda = (__u32)(addr_t) prssdp;
5069 /* Read Subsystem Data - message buffer */
5070 message_buf = (struct dasd_rssd_messages *) (prssdp + 1);
5071 memset(message_buf, 0, sizeof(struct dasd_rssd_messages));
5074 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
5075 ccw->count = sizeof(struct dasd_rssd_messages);
5076 ccw->flags |= CCW_FLAG_SLI;
5077 ccw->cda = (__u32)(addr_t) message_buf;
5079 cqr->buildclk = get_tod_clock();
5080 cqr->status = DASD_CQR_FILLED;
5081 rc = dasd_sleep_on_immediatly(cqr);
5083 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
5084 message_buf = (struct dasd_rssd_messages *)
5086 memcpy(messages, message_buf,
5087 sizeof(struct dasd_rssd_messages));
5088 } else if (cqr->lpm) {
5090 * on z/VM we might not be able to do I/O on the requested path
5091 * but instead we get the required information on any path
5092 * so retry with open path mask
5097 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
5098 "Reading messages failed with rc=%d\n"
5100 dasd_sfree_request(cqr, cqr->memdev);
5104 static int dasd_eckd_query_host_access(struct dasd_device *device,
5105 struct dasd_psf_query_host_access *data)
5107 struct dasd_eckd_private *private = device->private;
5108 struct dasd_psf_query_host_access *host_access;
5109 struct dasd_psf_prssd_data *prssdp;
5110 struct dasd_ccw_req *cqr;
5114 /* not available for HYPER PAV alias devices */
5115 if (!device->block && private->lcu->pav == HYPER_PAV)
5118 /* may not be supported by the storage server */
5119 if (!(private->features.feature[14] & 0x80))
5122 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
5123 sizeof(struct dasd_psf_prssd_data) + 1,
5126 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
5127 "Could not allocate read message buffer request");
5128 return PTR_ERR(cqr);
5130 host_access = kzalloc(sizeof(*host_access), GFP_KERNEL | GFP_DMA);
5132 dasd_sfree_request(cqr, device);
5133 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
5134 "Could not allocate host_access buffer");
5137 cqr->startdev = device;
5138 cqr->memdev = device;
5141 cqr->expires = 10 * HZ;
5143 /* Prepare for Read Subsystem Data */
5144 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
5145 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
5146 prssdp->order = PSF_ORDER_PRSSD;
5147 prssdp->suborder = PSF_SUBORDER_QHA; /* query host access */
5148 /* LSS and Volume that will be queried */
5149 prssdp->lss = private->ned->ID;
5150 prssdp->volume = private->ned->unit_addr;
5151 /* all other bytes of prssdp must be zero */
5154 ccw->cmd_code = DASD_ECKD_CCW_PSF;
5155 ccw->count = sizeof(struct dasd_psf_prssd_data);
5156 ccw->flags |= CCW_FLAG_CC;
5157 ccw->flags |= CCW_FLAG_SLI;
5158 ccw->cda = (__u32)(addr_t) prssdp;
5160 /* Read Subsystem Data - query host access */
5162 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
5163 ccw->count = sizeof(struct dasd_psf_query_host_access);
5164 ccw->flags |= CCW_FLAG_SLI;
5165 ccw->cda = (__u32)(addr_t) host_access;
5167 cqr->buildclk = get_tod_clock();
5168 cqr->status = DASD_CQR_FILLED;
5169 /* the command might not be supported, suppress error message */
5170 __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags);
5171 rc = dasd_sleep_on_interruptible(cqr);
5173 *data = *host_access;
5175 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
5176 "Reading host access data failed with rc=%d\n",
5181 dasd_sfree_request(cqr, cqr->memdev);
5186 * return number of grouped devices
5188 static int dasd_eckd_host_access_count(struct dasd_device *device)
5190 struct dasd_psf_query_host_access *access;
5191 struct dasd_ckd_path_group_entry *entry;
5192 struct dasd_ckd_host_information *info;
5196 access = kzalloc(sizeof(*access), GFP_NOIO);
5198 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
5199 "Could not allocate access buffer");
5202 rc = dasd_eckd_query_host_access(device, access);
5208 info = (struct dasd_ckd_host_information *)
5209 access->host_access_information;
5210 for (i = 0; i < info->entry_count; i++) {
5211 entry = (struct dasd_ckd_path_group_entry *)
5212 (info->entry + i * info->entry_size);
5213 if (entry->status_flags & DASD_ECKD_PG_GROUPED)
5222 * write host access information to a sequential file
5224 static int dasd_hosts_print(struct dasd_device *device, struct seq_file *m)
5226 struct dasd_psf_query_host_access *access;
5227 struct dasd_ckd_path_group_entry *entry;
5228 struct dasd_ckd_host_information *info;
5229 char sysplex[9] = "";
5232 access = kzalloc(sizeof(*access), GFP_NOIO);
5234 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
5235 "Could not allocate access buffer");
5238 rc = dasd_eckd_query_host_access(device, access);
5244 info = (struct dasd_ckd_host_information *)
5245 access->host_access_information;
5246 for (i = 0; i < info->entry_count; i++) {
5247 entry = (struct dasd_ckd_path_group_entry *)
5248 (info->entry + i * info->entry_size);
5250 seq_puts(m, "pgid ");
5251 for (j = 0; j < 11; j++)
5252 seq_printf(m, "%02x", entry->pgid[j]);
5255 seq_printf(m, "status_flags %02x\n", entry->status_flags);
5257 memcpy(&sysplex, &entry->sysplex_name, sizeof(sysplex) - 1);
5258 EBCASC(sysplex, sizeof(sysplex));
5259 seq_printf(m, "sysplex_name %8s\n", sysplex);
5260 /* SUPPORTED CYLINDER */
5261 seq_printf(m, "supported_cylinder %d\n", entry->cylinder);
5263 seq_printf(m, "timestamp %lu\n", (unsigned long)
5272 * Perform Subsystem Function - CUIR response
5275 dasd_eckd_psf_cuir_response(struct dasd_device *device, int response,
5276 __u32 message_id, __u8 lpum)
5278 struct dasd_psf_cuir_response *psf_cuir;
5279 int pos = pathmask_to_pos(lpum);
5280 struct dasd_ccw_req *cqr;
5284 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ ,
5285 sizeof(struct dasd_psf_cuir_response),
5289 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
5290 "Could not allocate PSF-CUIR request");
5291 return PTR_ERR(cqr);
5294 psf_cuir = (struct dasd_psf_cuir_response *)cqr->data;
5295 psf_cuir->order = PSF_ORDER_CUIR_RESPONSE;
5296 psf_cuir->cc = response;
5297 psf_cuir->chpid = device->path[pos].chpid;
5298 psf_cuir->message_id = message_id;
5299 psf_cuir->cssid = device->path[pos].cssid;
5300 psf_cuir->ssid = device->path[pos].ssid;
5302 ccw->cmd_code = DASD_ECKD_CCW_PSF;
5303 ccw->cda = (__u32)(addr_t)psf_cuir;
5304 ccw->flags = CCW_FLAG_SLI;
5305 ccw->count = sizeof(struct dasd_psf_cuir_response);
5307 cqr->startdev = device;
5308 cqr->memdev = device;
5311 cqr->expires = 10*HZ;
5312 cqr->buildclk = get_tod_clock();
5313 cqr->status = DASD_CQR_FILLED;
5314 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags);
5316 rc = dasd_sleep_on(cqr);
5318 dasd_sfree_request(cqr, cqr->memdev);
5323 * return configuration data that is referenced by record selector
5324 * if a record selector is specified or per default return the
5325 * conf_data pointer for the path specified by lpum
5327 static struct dasd_conf_data *dasd_eckd_get_ref_conf(struct dasd_device *device,
5329 struct dasd_cuir_message *cuir)
5331 struct dasd_conf_data *conf_data;
5334 if (cuir->record_selector == 0)
5336 for (path = 0x80, pos = 0; path; path >>= 1, pos++) {
5337 conf_data = device->path[pos].conf_data;
5338 if (conf_data->gneq.record_selector ==
5339 cuir->record_selector)
5343 return device->path[pathmask_to_pos(lpum)].conf_data;
5347 * This function determines the scope of a reconfiguration request by
5348 * analysing the path and device selection data provided in the CUIR request.
5349 * Returns a path mask containing CUIR affected paths for the give device.
5351 * If the CUIR request does not contain the required information return the
5352 * path mask of the path the attention message for the CUIR request was reveived
5355 static int dasd_eckd_cuir_scope(struct dasd_device *device, __u8 lpum,
5356 struct dasd_cuir_message *cuir)
5358 struct dasd_conf_data *ref_conf_data;
5359 unsigned long bitmask = 0, mask = 0;
5360 struct dasd_conf_data *conf_data;
5361 unsigned int pos, path;
5362 char *ref_gneq, *gneq;
5363 char *ref_ned, *ned;
5366 /* if CUIR request does not specify the scope use the path
5367 the attention message was presented on */
5368 if (!cuir->ned_map ||
5369 !(cuir->neq_map[0] | cuir->neq_map[1] | cuir->neq_map[2]))
5372 /* get reference conf data */
5373 ref_conf_data = dasd_eckd_get_ref_conf(device, lpum, cuir);
5374 /* reference ned is determined by ned_map field */
5375 pos = 8 - ffs(cuir->ned_map);
5376 ref_ned = (char *)&ref_conf_data->neds[pos];
5377 ref_gneq = (char *)&ref_conf_data->gneq;
5378 /* transfer 24 bit neq_map to mask */
5379 mask = cuir->neq_map[2];
5380 mask |= cuir->neq_map[1] << 8;
5381 mask |= cuir->neq_map[0] << 16;
5383 for (path = 0; path < 8; path++) {
5384 /* initialise data per path */
5386 conf_data = device->path[path].conf_data;
5387 pos = 8 - ffs(cuir->ned_map);
5388 ned = (char *) &conf_data->neds[pos];
5389 /* compare reference ned and per path ned */
5390 if (memcmp(ref_ned, ned, sizeof(*ned)) != 0)
5392 gneq = (char *)&conf_data->gneq;
5393 /* compare reference gneq and per_path gneq under
5394 24 bit mask where mask bit 0 equals byte 7 of
5395 the gneq and mask bit 24 equals byte 31 */
5397 pos = ffs(bitmask) - 1;
5398 if (memcmp(&ref_gneq[31 - pos], &gneq[31 - pos], 1)
5401 clear_bit(pos, &bitmask);
5405 /* device and path match the reference values
5406 add path to CUIR scope */
5407 tbcpm |= 0x80 >> path;
5412 static void dasd_eckd_cuir_notify_user(struct dasd_device *device,
5413 unsigned long paths, int action)
5418 /* get position of bit in mask */
5419 pos = 8 - ffs(paths);
5420 /* get channel path descriptor from this position */
5421 if (action == CUIR_QUIESCE)
5422 pr_warn("Service on the storage server caused path %x.%02x to go offline",
5423 device->path[pos].cssid,
5424 device->path[pos].chpid);
5425 else if (action == CUIR_RESUME)
5426 pr_info("Path %x.%02x is back online after service on the storage server",
5427 device->path[pos].cssid,
5428 device->path[pos].chpid);
5429 clear_bit(7 - pos, &paths);
5433 static int dasd_eckd_cuir_remove_path(struct dasd_device *device, __u8 lpum,
5434 struct dasd_cuir_message *cuir)
5436 unsigned long tbcpm;
5438 tbcpm = dasd_eckd_cuir_scope(device, lpum, cuir);
5439 /* nothing to do if path is not in use */
5440 if (!(dasd_path_get_opm(device) & tbcpm))
5442 if (!(dasd_path_get_opm(device) & ~tbcpm)) {
5443 /* no path would be left if the CUIR action is taken
5447 /* remove device from operational path mask */
5448 dasd_path_remove_opm(device, tbcpm);
5449 dasd_path_add_cuirpm(device, tbcpm);
5454 * walk through all devices and build a path mask to quiesce them
5455 * return an error if the last path to a device would be removed
5457 * if only part of the devices are quiesced and an error
5458 * occurs no onlining necessary, the storage server will
5459 * notify the already set offline devices again
5461 static int dasd_eckd_cuir_quiesce(struct dasd_device *device, __u8 lpum,
5462 struct dasd_cuir_message *cuir)
5464 struct dasd_eckd_private *private = device->private;
5465 struct alias_pav_group *pavgroup, *tempgroup;
5466 struct dasd_device *dev, *n;
5467 unsigned long paths = 0;
5468 unsigned long flags;
5471 /* active devices */
5472 list_for_each_entry_safe(dev, n, &private->lcu->active_devices,
5474 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
5475 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
5476 spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags);
5481 /* inactive devices */
5482 list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices,
5484 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
5485 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
5486 spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags);
5491 /* devices in PAV groups */
5492 list_for_each_entry_safe(pavgroup, tempgroup,
5493 &private->lcu->grouplist, group) {
5494 list_for_each_entry_safe(dev, n, &pavgroup->baselist,
5496 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
5497 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
5498 spin_unlock_irqrestore(
5499 get_ccwdev_lock(dev->cdev), flags);
5504 list_for_each_entry_safe(dev, n, &pavgroup->aliaslist,
5506 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
5507 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
5508 spin_unlock_irqrestore(
5509 get_ccwdev_lock(dev->cdev), flags);
5515 /* notify user about all paths affected by CUIR action */
5516 dasd_eckd_cuir_notify_user(device, paths, CUIR_QUIESCE);
5522 static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum,
5523 struct dasd_cuir_message *cuir)
5525 struct dasd_eckd_private *private = device->private;
5526 struct alias_pav_group *pavgroup, *tempgroup;
5527 struct dasd_device *dev, *n;
5528 unsigned long paths = 0;
5532 * the path may have been added through a generic path event before
5533 * only trigger path verification if the path is not already in use
5535 list_for_each_entry_safe(dev, n,
5536 &private->lcu->active_devices,
5538 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
5540 if (!(dasd_path_get_opm(dev) & tbcpm)) {
5541 dasd_path_add_tbvpm(dev, tbcpm);
5542 dasd_schedule_device_bh(dev);
5545 list_for_each_entry_safe(dev, n,
5546 &private->lcu->inactive_devices,
5548 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
5550 if (!(dasd_path_get_opm(dev) & tbcpm)) {
5551 dasd_path_add_tbvpm(dev, tbcpm);
5552 dasd_schedule_device_bh(dev);
5555 /* devices in PAV groups */
5556 list_for_each_entry_safe(pavgroup, tempgroup,
5557 &private->lcu->grouplist,
5559 list_for_each_entry_safe(dev, n,
5560 &pavgroup->baselist,
5562 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
5564 if (!(dasd_path_get_opm(dev) & tbcpm)) {
5565 dasd_path_add_tbvpm(dev, tbcpm);
5566 dasd_schedule_device_bh(dev);
5569 list_for_each_entry_safe(dev, n,
5570 &pavgroup->aliaslist,
5572 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
5574 if (!(dasd_path_get_opm(dev) & tbcpm)) {
5575 dasd_path_add_tbvpm(dev, tbcpm);
5576 dasd_schedule_device_bh(dev);
5580 /* notify user about all paths affected by CUIR action */
5581 dasd_eckd_cuir_notify_user(device, paths, CUIR_RESUME);
5585 static void dasd_eckd_handle_cuir(struct dasd_device *device, void *messages,
5588 struct dasd_cuir_message *cuir = messages;
5591 DBF_DEV_EVENT(DBF_WARNING, device,
5592 "CUIR request: %016llx %016llx %016llx %08x",
5593 ((u64 *)cuir)[0], ((u64 *)cuir)[1], ((u64 *)cuir)[2],
5596 if (cuir->code == CUIR_QUIESCE) {
5598 if (dasd_eckd_cuir_quiesce(device, lpum, cuir))
5599 response = PSF_CUIR_LAST_PATH;
5601 response = PSF_CUIR_COMPLETED;
5602 } else if (cuir->code == CUIR_RESUME) {
5604 dasd_eckd_cuir_resume(device, lpum, cuir);
5605 response = PSF_CUIR_COMPLETED;
5607 response = PSF_CUIR_NOT_SUPPORTED;
5609 dasd_eckd_psf_cuir_response(device, response,
5610 cuir->message_id, lpum);
5611 DBF_DEV_EVENT(DBF_WARNING, device,
5612 "CUIR response: %d on message ID %08x", response,
5614 /* to make sure there is no attention left schedule work again */
5615 device->discipline->check_attention(device, lpum);
5618 static void dasd_eckd_check_attention_work(struct work_struct *work)
5620 struct check_attention_work_data *data;
5621 struct dasd_rssd_messages *messages;
5622 struct dasd_device *device;
5625 data = container_of(work, struct check_attention_work_data, worker);
5626 device = data->device;
5627 messages = kzalloc(sizeof(*messages), GFP_KERNEL);
5629 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
5630 "Could not allocate attention message buffer");
5633 rc = dasd_eckd_read_message_buffer(device, messages, data->lpum);
5636 if (messages->length == ATTENTION_LENGTH_CUIR &&
5637 messages->format == ATTENTION_FORMAT_CUIR)
5638 dasd_eckd_handle_cuir(device, messages, data->lpum);
5640 dasd_put_device(device);
5645 static int dasd_eckd_check_attention(struct dasd_device *device, __u8 lpum)
5647 struct check_attention_work_data *data;
5649 data = kzalloc(sizeof(*data), GFP_ATOMIC);
5652 INIT_WORK(&data->worker, dasd_eckd_check_attention_work);
5653 dasd_get_device(device);
5654 data->device = device;
5656 schedule_work(&data->worker);
5660 static int dasd_eckd_disable_hpf_path(struct dasd_device *device, __u8 lpum)
5662 if (~lpum & dasd_path_get_opm(device)) {
5663 dasd_path_add_nohpfpm(device, lpum);
5664 dasd_path_remove_opm(device, lpum);
5665 dev_err(&device->cdev->dev,
5666 "Channel path %02X lost HPF functionality and is disabled\n",
5673 static void dasd_eckd_disable_hpf_device(struct dasd_device *device)
5675 struct dasd_eckd_private *private = device->private;
5677 dev_err(&device->cdev->dev,
5678 "High Performance FICON disabled\n");
5679 private->fcx_max_data = 0;
5682 static int dasd_eckd_hpf_enabled(struct dasd_device *device)
5684 struct dasd_eckd_private *private = device->private;
5686 return private->fcx_max_data ? 1 : 0;
5689 static void dasd_eckd_handle_hpf_error(struct dasd_device *device,
5692 struct dasd_eckd_private *private = device->private;
5694 if (!private->fcx_max_data) {
5695 /* sanity check for no HPF, the error makes no sense */
5696 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
5697 "Trying to disable HPF for a non HPF device");
5700 if (irb->scsw.tm.sesq == SCSW_SESQ_DEV_NOFCX) {
5701 dasd_eckd_disable_hpf_device(device);
5702 } else if (irb->scsw.tm.sesq == SCSW_SESQ_PATH_NOFCX) {
5703 if (dasd_eckd_disable_hpf_path(device, irb->esw.esw1.lpum))
5705 dasd_eckd_disable_hpf_device(device);
5706 dasd_path_set_tbvpm(device,
5707 dasd_path_get_hpfpm(device));
5710 * prevent that any new I/O ist started on the device and schedule a
5711 * requeue of existing requests
5713 dasd_device_set_stop_bits(device, DASD_STOPPED_NOT_ACC);
5714 dasd_schedule_requeue(device);
5717 static struct ccw_driver dasd_eckd_driver = {
5719 .name = "dasd-eckd",
5720 .owner = THIS_MODULE,
5722 .ids = dasd_eckd_ids,
5723 .probe = dasd_eckd_probe,
5724 .remove = dasd_generic_remove,
5725 .set_offline = dasd_generic_set_offline,
5726 .set_online = dasd_eckd_set_online,
5727 .notify = dasd_generic_notify,
5728 .path_event = dasd_generic_path_event,
5729 .shutdown = dasd_generic_shutdown,
5730 .freeze = dasd_generic_pm_freeze,
5731 .thaw = dasd_generic_restore_device,
5732 .restore = dasd_generic_restore_device,
5733 .uc_handler = dasd_generic_uc_handler,
5734 .int_class = IRQIO_DAS,
5738 * max_blocks is dependent on the amount of storage that is available
5739 * in the static io buffer for each device. Currently each device has
5740 * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has
5741 * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use
5742 * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In
5743 * addition we have one define extent ccw + 16 bytes of data and one
5744 * locate record ccw + 16 bytes of data. That makes:
5745 * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum.
5746 * We want to fit two into the available memory so that we can immediately
5747 * start the next request if one finishes off. That makes 249.5 blocks
5748 * for one request. Give a little safety and the result is 240.
5750 static struct dasd_discipline dasd_eckd_discipline = {
5751 .owner = THIS_MODULE,
5755 .check_device = dasd_eckd_check_characteristics,
5756 .uncheck_device = dasd_eckd_uncheck_device,
5757 .do_analysis = dasd_eckd_do_analysis,
5758 .verify_path = dasd_eckd_verify_path,
5759 .basic_to_ready = dasd_eckd_basic_to_ready,
5760 .online_to_ready = dasd_eckd_online_to_ready,
5761 .basic_to_known = dasd_eckd_basic_to_known,
5762 .fill_geometry = dasd_eckd_fill_geometry,
5763 .start_IO = dasd_start_IO,
5764 .term_IO = dasd_term_IO,
5765 .handle_terminated_request = dasd_eckd_handle_terminated_request,
5766 .format_device = dasd_eckd_format_device,
5767 .check_device_format = dasd_eckd_check_device_format,
5768 .erp_action = dasd_eckd_erp_action,
5769 .erp_postaction = dasd_eckd_erp_postaction,
5770 .check_for_device_change = dasd_eckd_check_for_device_change,
5771 .build_cp = dasd_eckd_build_alias_cp,
5772 .free_cp = dasd_eckd_free_alias_cp,
5773 .dump_sense = dasd_eckd_dump_sense,
5774 .dump_sense_dbf = dasd_eckd_dump_sense_dbf,
5775 .fill_info = dasd_eckd_fill_info,
5776 .ioctl = dasd_eckd_ioctl,
5777 .freeze = dasd_eckd_pm_freeze,
5778 .restore = dasd_eckd_restore_device,
5779 .reload = dasd_eckd_reload_device,
5780 .get_uid = dasd_eckd_get_uid,
5781 .kick_validate = dasd_eckd_kick_validate_server,
5782 .check_attention = dasd_eckd_check_attention,
5783 .host_access_count = dasd_eckd_host_access_count,
5784 .hosts_print = dasd_hosts_print,
5785 .handle_hpf_error = dasd_eckd_handle_hpf_error,
5786 .disable_hpf = dasd_eckd_disable_hpf_device,
5787 .hpf_enabled = dasd_eckd_hpf_enabled,
5788 .reset_path = dasd_eckd_reset_path,
5792 dasd_eckd_init(void)
5796 ASCEBC(dasd_eckd_discipline.ebcname, 4);
5797 dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req),
5798 GFP_KERNEL | GFP_DMA);
5799 if (!dasd_reserve_req)
5801 path_verification_worker = kmalloc(sizeof(*path_verification_worker),
5802 GFP_KERNEL | GFP_DMA);
5803 if (!path_verification_worker) {
5804 kfree(dasd_reserve_req);
5807 rawpadpage = (void *)__get_free_page(GFP_KERNEL);
5809 kfree(path_verification_worker);
5810 kfree(dasd_reserve_req);
5813 ret = ccw_driver_register(&dasd_eckd_driver);
5815 wait_for_device_probe();
5817 kfree(path_verification_worker);
5818 kfree(dasd_reserve_req);
5819 free_page((unsigned long)rawpadpage);
5825 dasd_eckd_cleanup(void)
5827 ccw_driver_unregister(&dasd_eckd_driver);
5828 kfree(path_verification_worker);
5829 kfree(dasd_reserve_req);
5830 free_page((unsigned long)rawpadpage);
5833 module_init(dasd_eckd_init);
5834 module_exit(dasd_eckd_cleanup);