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):"
46 * raw track access always map to 64k in memory
47 * so it maps to 16 blocks of 4k per track
49 #define DASD_RAW_BLOCK_PER_TRACK 16
50 #define DASD_RAW_BLOCKSIZE 4096
51 /* 64k are 128 x 512 byte sectors */
52 #define DASD_RAW_SECTORS_PER_TRACK 128
54 MODULE_LICENSE("GPL");
56 static struct dasd_discipline dasd_eckd_discipline;
58 /* The ccw bus type uses this table to find devices that it sends to
60 static struct ccw_device_id dasd_eckd_ids[] = {
61 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1},
62 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2},
63 { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3380, 0), .driver_info = 0x3},
64 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4},
65 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5},
66 { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6},
67 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7},
68 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8},
69 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9},
70 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa},
71 { /* end of list */ },
74 MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids);
76 static struct ccw_driver dasd_eckd_driver; /* see below */
78 static void *rawpadpage;
81 #define INIT_CQR_UNFORMATTED 1
82 #define INIT_CQR_ERROR 2
84 /* emergency request for reserve/release */
86 struct dasd_ccw_req cqr;
90 static DEFINE_MUTEX(dasd_reserve_mutex);
93 struct dasd_ccw_req cqr;
97 static DEFINE_MUTEX(dasd_vol_info_mutex);
99 struct ext_pool_exhaust_work_data {
100 struct work_struct worker;
101 struct dasd_device *device;
102 struct dasd_device *base;
105 /* definitions for the path verification worker */
106 struct path_verification_work_data {
107 struct work_struct worker;
108 struct dasd_device *device;
109 struct dasd_ccw_req cqr;
111 __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE];
115 static struct path_verification_work_data *path_verification_worker;
116 static DEFINE_MUTEX(dasd_path_verification_mutex);
118 struct check_attention_work_data {
119 struct work_struct worker;
120 struct dasd_device *device;
124 static int dasd_eckd_ext_pool_id(struct dasd_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, 1 };
161 static const int count_area_rec[] = { 1, 2, 3, 4, 1 };
163 static inline unsigned int
164 ceil_quot(unsigned int d1, unsigned int d2)
166 return (d1 + (d2 - 1)) / d2;
170 recs_per_track(struct dasd_eckd_characteristics * rdc,
171 unsigned int kl, unsigned int dl)
175 switch (rdc->dev_type) {
178 return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) +
179 ceil_quot(dl + 12, 32));
181 return 1499 / (15 + ceil_quot(dl + 12, 32));
183 dn = ceil_quot(dl + 6, 232) + 1;
185 kn = ceil_quot(kl + 6, 232) + 1;
186 return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) +
187 9 + ceil_quot(dl + 6 * dn, 34));
189 return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34));
191 dn = ceil_quot(dl + 6, 232) + 1;
193 kn = ceil_quot(kl + 6, 232) + 1;
194 return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) +
195 ceil_quot(dl + 6 * dn, 34));
197 return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34));
202 static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head)
204 geo->cyl = (__u16) cyl;
205 geo->head = cyl >> 16;
210 static int set_timestamp(struct ccw1 *ccw, struct DE_eckd_data *data,
211 struct dasd_device *device)
213 struct dasd_eckd_private *private = device->private;
216 rc = get_phys_clock(&data->ep_sys_time);
218 * Ignore return code if XRC is not supported or
219 * sync clock is switched off
221 if ((rc && !private->rdc_data.facilities.XRC_supported) ||
222 rc == -EOPNOTSUPP || rc == -EACCES)
225 /* switch on System Time Stamp - needed for XRC Support */
226 data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */
227 data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */
230 ccw->count = sizeof(struct DE_eckd_data);
231 ccw->flags |= CCW_FLAG_SLI;
238 define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk,
239 unsigned int totrk, int cmd, struct dasd_device *device,
242 struct dasd_eckd_private *private = device->private;
243 u16 heads, beghead, endhead;
248 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT;
251 ccw->cda = (__u32)__pa(data);
254 memset(data, 0, sizeof(struct DE_eckd_data));
256 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
257 case DASD_ECKD_CCW_READ_RECORD_ZERO:
258 case DASD_ECKD_CCW_READ:
259 case DASD_ECKD_CCW_READ_MT:
260 case DASD_ECKD_CCW_READ_CKD:
261 case DASD_ECKD_CCW_READ_CKD_MT:
262 case DASD_ECKD_CCW_READ_KD:
263 case DASD_ECKD_CCW_READ_KD_MT:
264 data->mask.perm = 0x1;
265 data->attributes.operation = private->attrib.operation;
267 case DASD_ECKD_CCW_READ_COUNT:
268 data->mask.perm = 0x1;
269 data->attributes.operation = DASD_BYPASS_CACHE;
271 case DASD_ECKD_CCW_READ_TRACK:
272 case DASD_ECKD_CCW_READ_TRACK_DATA:
273 data->mask.perm = 0x1;
274 data->attributes.operation = private->attrib.operation;
277 case DASD_ECKD_CCW_WRITE:
278 case DASD_ECKD_CCW_WRITE_MT:
279 case DASD_ECKD_CCW_WRITE_KD:
280 case DASD_ECKD_CCW_WRITE_KD_MT:
281 data->mask.perm = 0x02;
282 data->attributes.operation = private->attrib.operation;
283 rc = set_timestamp(ccw, data, device);
285 case DASD_ECKD_CCW_WRITE_CKD:
286 case DASD_ECKD_CCW_WRITE_CKD_MT:
287 data->attributes.operation = DASD_BYPASS_CACHE;
288 rc = set_timestamp(ccw, data, device);
290 case DASD_ECKD_CCW_ERASE:
291 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
292 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
293 data->mask.perm = 0x3;
294 data->mask.auth = 0x1;
295 data->attributes.operation = DASD_BYPASS_CACHE;
296 rc = set_timestamp(ccw, data, device);
298 case DASD_ECKD_CCW_WRITE_FULL_TRACK:
299 data->mask.perm = 0x03;
300 data->attributes.operation = private->attrib.operation;
303 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
304 data->mask.perm = 0x02;
305 data->attributes.operation = private->attrib.operation;
306 data->blk_size = blksize;
307 rc = set_timestamp(ccw, data, device);
310 dev_err(&device->cdev->dev,
311 "0x%x is not a known command\n", cmd);
315 data->attributes.mode = 0x3; /* ECKD */
317 if ((private->rdc_data.cu_type == 0x2105 ||
318 private->rdc_data.cu_type == 0x2107 ||
319 private->rdc_data.cu_type == 0x1750)
320 && !(private->uses_cdl && trk < 2))
321 data->ga_extended |= 0x40; /* Regular Data Format Mode */
323 heads = private->rdc_data.trk_per_cyl;
324 begcyl = trk / heads;
325 beghead = trk % heads;
326 endcyl = totrk / heads;
327 endhead = totrk % heads;
329 /* check for sequential prestage - enhance cylinder range */
330 if (data->attributes.operation == DASD_SEQ_PRESTAGE ||
331 data->attributes.operation == DASD_SEQ_ACCESS) {
333 if (endcyl + private->attrib.nr_cyl < private->real_cyl)
334 endcyl += private->attrib.nr_cyl;
336 endcyl = (private->real_cyl - 1);
339 set_ch_t(&data->beg_ext, begcyl, beghead);
340 set_ch_t(&data->end_ext, endcyl, endhead);
345 static void locate_record_ext(struct ccw1 *ccw, struct LRE_eckd_data *data,
346 unsigned int trk, unsigned int rec_on_trk,
347 int count, int cmd, struct dasd_device *device,
348 unsigned int reclen, unsigned int tlf)
350 struct dasd_eckd_private *private = device->private;
355 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD_EXT;
357 if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK)
361 ccw->cda = (__u32)__pa(data);
364 memset(data, 0, sizeof(*data));
367 switch (private->rdc_data.dev_type) {
369 dn = ceil_quot(reclen + 6, 232);
370 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
371 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
374 d = 7 + ceil_quot(reclen + 12, 32);
375 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
379 data->sector = sector;
380 /* note: meaning of count depends on the operation
381 * for record based I/O it's the number of records, but for
382 * track based I/O it's the number of tracks
386 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
387 data->operation.orientation = 0x3;
388 data->operation.operation = 0x03;
390 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
391 data->operation.orientation = 0x3;
392 data->operation.operation = 0x16;
394 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
395 data->operation.orientation = 0x1;
396 data->operation.operation = 0x03;
399 case DASD_ECKD_CCW_READ_RECORD_ZERO:
400 data->operation.orientation = 0x3;
401 data->operation.operation = 0x16;
404 case DASD_ECKD_CCW_WRITE:
405 case DASD_ECKD_CCW_WRITE_MT:
406 case DASD_ECKD_CCW_WRITE_KD:
407 case DASD_ECKD_CCW_WRITE_KD_MT:
408 data->auxiliary.length_valid = 0x1;
409 data->length = reclen;
410 data->operation.operation = 0x01;
412 case DASD_ECKD_CCW_WRITE_CKD:
413 case DASD_ECKD_CCW_WRITE_CKD_MT:
414 data->auxiliary.length_valid = 0x1;
415 data->length = reclen;
416 data->operation.operation = 0x03;
418 case DASD_ECKD_CCW_WRITE_FULL_TRACK:
419 data->operation.orientation = 0x0;
420 data->operation.operation = 0x3F;
421 data->extended_operation = 0x11;
423 data->extended_parameter_length = 0x02;
424 if (data->count > 8) {
425 data->extended_parameter[0] = 0xFF;
426 data->extended_parameter[1] = 0xFF;
427 data->extended_parameter[1] <<= (16 - count);
429 data->extended_parameter[0] = 0xFF;
430 data->extended_parameter[0] <<= (8 - count);
431 data->extended_parameter[1] = 0x00;
435 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
436 data->auxiliary.length_valid = 0x1;
437 data->length = reclen; /* not tlf, as one might think */
438 data->operation.operation = 0x3F;
439 data->extended_operation = 0x23;
441 case DASD_ECKD_CCW_READ:
442 case DASD_ECKD_CCW_READ_MT:
443 case DASD_ECKD_CCW_READ_KD:
444 case DASD_ECKD_CCW_READ_KD_MT:
445 data->auxiliary.length_valid = 0x1;
446 data->length = reclen;
447 data->operation.operation = 0x06;
449 case DASD_ECKD_CCW_READ_CKD:
450 case DASD_ECKD_CCW_READ_CKD_MT:
451 data->auxiliary.length_valid = 0x1;
452 data->length = reclen;
453 data->operation.operation = 0x16;
455 case DASD_ECKD_CCW_READ_COUNT:
456 data->operation.operation = 0x06;
458 case DASD_ECKD_CCW_READ_TRACK:
459 data->operation.orientation = 0x1;
460 data->operation.operation = 0x0C;
461 data->extended_parameter_length = 0;
464 case DASD_ECKD_CCW_READ_TRACK_DATA:
465 data->auxiliary.length_valid = 0x1;
467 data->operation.operation = 0x0C;
469 case DASD_ECKD_CCW_ERASE:
470 data->length = reclen;
471 data->auxiliary.length_valid = 0x1;
472 data->operation.operation = 0x0b;
475 DBF_DEV_EVENT(DBF_ERR, device,
476 "fill LRE unknown opcode 0x%x", cmd);
479 set_ch_t(&data->seek_addr,
480 trk / private->rdc_data.trk_per_cyl,
481 trk % private->rdc_data.trk_per_cyl);
482 data->search_arg.cyl = data->seek_addr.cyl;
483 data->search_arg.head = data->seek_addr.head;
484 data->search_arg.record = rec_on_trk;
487 static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
488 unsigned int trk, unsigned int totrk, int cmd,
489 struct dasd_device *basedev, struct dasd_device *startdev,
490 unsigned int format, unsigned int rec_on_trk, int count,
491 unsigned int blksize, unsigned int tlf)
493 struct dasd_eckd_private *basepriv, *startpriv;
494 struct LRE_eckd_data *lredata;
495 struct DE_eckd_data *dedata;
498 basepriv = basedev->private;
499 startpriv = startdev->private;
500 dedata = &pfxdata->define_extent;
501 lredata = &pfxdata->locate_record;
503 ccw->cmd_code = DASD_ECKD_CCW_PFX;
505 if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) {
506 ccw->count = sizeof(*pfxdata) + 2;
507 ccw->cda = (__u32) __pa(pfxdata);
508 memset(pfxdata, 0, sizeof(*pfxdata) + 2);
510 ccw->count = sizeof(*pfxdata);
511 ccw->cda = (__u32) __pa(pfxdata);
512 memset(pfxdata, 0, sizeof(*pfxdata));
517 DBF_DEV_EVENT(DBF_ERR, basedev,
518 "PFX LRE unknown format 0x%x", format);
522 pfxdata->format = format;
523 pfxdata->base_address = basepriv->ned->unit_addr;
524 pfxdata->base_lss = basepriv->ned->ID;
525 pfxdata->validity.define_extent = 1;
527 /* private uid is kept up to date, conf_data may be outdated */
528 if (startpriv->uid.type == UA_BASE_PAV_ALIAS)
529 pfxdata->validity.verify_base = 1;
531 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) {
532 pfxdata->validity.verify_base = 1;
533 pfxdata->validity.hyper_pav = 1;
536 rc = define_extent(NULL, dedata, trk, totrk, cmd, basedev, blksize);
539 * For some commands the System Time Stamp is set in the define extent
540 * data when XRC is supported. The validity of the time stamp must be
541 * reflected in the prefix data as well.
543 if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02)
544 pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */
547 locate_record_ext(NULL, lredata, trk, rec_on_trk, count, cmd,
548 basedev, blksize, tlf);
554 static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
555 unsigned int trk, unsigned int totrk, int cmd,
556 struct dasd_device *basedev, struct dasd_device *startdev)
558 return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev,
563 locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk,
564 unsigned int rec_on_trk, int no_rec, int cmd,
565 struct dasd_device * device, int reclen)
567 struct dasd_eckd_private *private = device->private;
571 DBF_DEV_EVENT(DBF_INFO, device,
572 "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d",
573 trk, rec_on_trk, no_rec, cmd, reclen);
575 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD;
578 ccw->cda = (__u32) __pa(data);
580 memset(data, 0, sizeof(struct LO_eckd_data));
583 switch (private->rdc_data.dev_type) {
585 dn = ceil_quot(reclen + 6, 232);
586 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
587 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
590 d = 7 + ceil_quot(reclen + 12, 32);
591 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
595 data->sector = sector;
596 data->count = no_rec;
598 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
599 data->operation.orientation = 0x3;
600 data->operation.operation = 0x03;
602 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
603 data->operation.orientation = 0x3;
604 data->operation.operation = 0x16;
606 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
607 data->operation.orientation = 0x1;
608 data->operation.operation = 0x03;
611 case DASD_ECKD_CCW_READ_RECORD_ZERO:
612 data->operation.orientation = 0x3;
613 data->operation.operation = 0x16;
616 case DASD_ECKD_CCW_WRITE:
617 case DASD_ECKD_CCW_WRITE_MT:
618 case DASD_ECKD_CCW_WRITE_KD:
619 case DASD_ECKD_CCW_WRITE_KD_MT:
620 data->auxiliary.last_bytes_used = 0x1;
621 data->length = reclen;
622 data->operation.operation = 0x01;
624 case DASD_ECKD_CCW_WRITE_CKD:
625 case DASD_ECKD_CCW_WRITE_CKD_MT:
626 data->auxiliary.last_bytes_used = 0x1;
627 data->length = reclen;
628 data->operation.operation = 0x03;
630 case DASD_ECKD_CCW_READ:
631 case DASD_ECKD_CCW_READ_MT:
632 case DASD_ECKD_CCW_READ_KD:
633 case DASD_ECKD_CCW_READ_KD_MT:
634 data->auxiliary.last_bytes_used = 0x1;
635 data->length = reclen;
636 data->operation.operation = 0x06;
638 case DASD_ECKD_CCW_READ_CKD:
639 case DASD_ECKD_CCW_READ_CKD_MT:
640 data->auxiliary.last_bytes_used = 0x1;
641 data->length = reclen;
642 data->operation.operation = 0x16;
644 case DASD_ECKD_CCW_READ_COUNT:
645 data->operation.operation = 0x06;
647 case DASD_ECKD_CCW_ERASE:
648 data->length = reclen;
649 data->auxiliary.last_bytes_used = 0x1;
650 data->operation.operation = 0x0b;
653 DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record "
656 set_ch_t(&data->seek_addr,
657 trk / private->rdc_data.trk_per_cyl,
658 trk % private->rdc_data.trk_per_cyl);
659 data->search_arg.cyl = data->seek_addr.cyl;
660 data->search_arg.head = data->seek_addr.head;
661 data->search_arg.record = rec_on_trk;
665 * Returns 1 if the block is one of the special blocks that needs
666 * to get read/written with the KD variant of the command.
667 * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and
668 * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT.
669 * Luckily the KD variants differ only by one bit (0x08) from the
670 * normal variant. So don't wonder about code like:
671 * if (dasd_eckd_cdl_special(blk_per_trk, recid))
672 * ccw->cmd_code |= 0x8;
675 dasd_eckd_cdl_special(int blk_per_trk, int recid)
679 if (recid < blk_per_trk)
681 if (recid < 2 * blk_per_trk)
687 * Returns the record size for the special blocks of the cdl format.
688 * Only returns something useful if dasd_eckd_cdl_special is true
692 dasd_eckd_cdl_reclen(int recid)
695 return sizes_trk0[recid];
698 /* create unique id from private structure. */
699 static void create_uid(struct dasd_eckd_private *private)
702 struct dasd_uid *uid;
705 memset(uid, 0, sizeof(struct dasd_uid));
706 memcpy(uid->vendor, private->ned->HDA_manufacturer,
707 sizeof(uid->vendor) - 1);
708 EBCASC(uid->vendor, sizeof(uid->vendor) - 1);
709 memcpy(uid->serial, private->ned->HDA_location,
710 sizeof(uid->serial) - 1);
711 EBCASC(uid->serial, sizeof(uid->serial) - 1);
712 uid->ssid = private->gneq->subsystemID;
713 uid->real_unit_addr = private->ned->unit_addr;
715 uid->type = private->sneq->sua_flags;
716 if (uid->type == UA_BASE_PAV_ALIAS)
717 uid->base_unit_addr = private->sneq->base_unit_addr;
719 uid->type = UA_BASE_DEVICE;
721 if (private->vdsneq) {
722 for (count = 0; count < 16; count++) {
723 sprintf(uid->vduit+2*count, "%02x",
724 private->vdsneq->uit[count]);
730 * Generate device unique id that specifies the physical device.
732 static int dasd_eckd_generate_uid(struct dasd_device *device)
734 struct dasd_eckd_private *private = device->private;
739 if (!private->ned || !private->gneq)
741 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
743 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
747 static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid)
749 struct dasd_eckd_private *private = device->private;
753 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
755 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
762 * compare device UID with data of a given dasd_eckd_private structure
765 static int dasd_eckd_compare_path_uid(struct dasd_device *device,
766 struct dasd_eckd_private *private)
768 struct dasd_uid device_uid;
771 dasd_eckd_get_uid(device, &device_uid);
773 return memcmp(&device_uid, &private->uid, sizeof(struct dasd_uid));
776 static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device,
777 struct dasd_ccw_req *cqr,
783 * buffer has to start with EBCDIC "V1.0" to show
784 * support for virtual device SNEQ
786 rcd_buffer[0] = 0xE5;
787 rcd_buffer[1] = 0xF1;
788 rcd_buffer[2] = 0x4B;
789 rcd_buffer[3] = 0xF0;
792 ccw->cmd_code = DASD_ECKD_CCW_RCD;
794 ccw->cda = (__u32)(addr_t)rcd_buffer;
795 ccw->count = DASD_ECKD_RCD_DATA_SIZE;
796 cqr->magic = DASD_ECKD_MAGIC;
798 cqr->startdev = device;
799 cqr->memdev = device;
801 cqr->expires = 10*HZ;
804 cqr->buildclk = get_tod_clock();
805 cqr->status = DASD_CQR_FILLED;
806 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags);
810 * Wakeup helper for read_conf
811 * if the cqr is not done and needs some error recovery
812 * the buffer has to be re-initialized with the EBCDIC "V1.0"
813 * to show support for virtual device SNEQ
815 static void read_conf_cb(struct dasd_ccw_req *cqr, void *data)
820 if (cqr->status != DASD_CQR_DONE) {
822 rcd_buffer = (__u8 *)((addr_t) ccw->cda);
823 memset(rcd_buffer, 0, sizeof(*rcd_buffer));
825 rcd_buffer[0] = 0xE5;
826 rcd_buffer[1] = 0xF1;
827 rcd_buffer[2] = 0x4B;
828 rcd_buffer[3] = 0xF0;
830 dasd_wakeup_cb(cqr, data);
833 static int dasd_eckd_read_conf_immediately(struct dasd_device *device,
834 struct dasd_ccw_req *cqr,
841 * sanity check: scan for RCD command in extended SenseID data
842 * some devices do not support RCD
844 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD);
845 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD)
848 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm);
849 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
850 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags);
852 cqr->callback = read_conf_cb;
853 rc = dasd_sleep_on_immediatly(cqr);
857 static int dasd_eckd_read_conf_lpm(struct dasd_device *device,
859 int *rcd_buffer_size, __u8 lpm)
862 char *rcd_buf = NULL;
864 struct dasd_ccw_req *cqr;
867 * sanity check: scan for RCD command in extended SenseID data
868 * some devices do not support RCD
870 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD);
871 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) {
875 rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA);
880 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */,
881 0, /* use rcd_buf as data ara */
884 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
885 "Could not allocate RCD request");
889 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm);
890 cqr->callback = read_conf_cb;
891 ret = dasd_sleep_on(cqr);
893 * on success we update the user input parms
895 dasd_sfree_request(cqr, cqr->memdev);
899 *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE;
900 *rcd_buffer = rcd_buf;
905 *rcd_buffer_size = 0;
909 static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private)
912 struct dasd_sneq *sneq;
916 private->sneq = NULL;
917 private->vdsneq = NULL;
918 private->gneq = NULL;
919 count = private->conf_len / sizeof(struct dasd_sneq);
920 sneq = (struct dasd_sneq *)private->conf_data;
921 for (i = 0; i < count; ++i) {
922 if (sneq->flags.identifier == 1 && sneq->format == 1)
923 private->sneq = sneq;
924 else if (sneq->flags.identifier == 1 && sneq->format == 4)
925 private->vdsneq = (struct vd_sneq *)sneq;
926 else if (sneq->flags.identifier == 2)
927 private->gneq = (struct dasd_gneq *)sneq;
928 else if (sneq->flags.identifier == 3 && sneq->res1 == 1)
929 private->ned = (struct dasd_ned *)sneq;
932 if (!private->ned || !private->gneq) {
934 private->sneq = NULL;
935 private->vdsneq = NULL;
936 private->gneq = NULL;
943 static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len)
945 struct dasd_gneq *gneq;
948 count = conf_len / sizeof(*gneq);
949 gneq = (struct dasd_gneq *)conf_data;
951 for (i = 0; i < count; ++i) {
952 if (gneq->flags.identifier == 2) {
959 return ((char *)gneq)[18] & 0x07;
964 static void dasd_eckd_clear_conf_data(struct dasd_device *device)
966 struct dasd_eckd_private *private = device->private;
969 private->conf_data = NULL;
970 private->conf_len = 0;
971 for (i = 0; i < 8; i++) {
972 kfree(device->path[i].conf_data);
973 device->path[i].conf_data = NULL;
974 device->path[i].cssid = 0;
975 device->path[i].ssid = 0;
976 device->path[i].chpid = 0;
981 static int dasd_eckd_read_conf(struct dasd_device *device)
984 int conf_len, conf_data_saved;
985 int rc, path_err, pos;
987 struct dasd_eckd_private *private, path_private;
988 struct dasd_uid *uid;
989 char print_path_uid[60], print_device_uid[60];
990 struct channel_path_desc_fmt0 *chp_desc;
991 struct subchannel_id sch_id;
993 private = device->private;
994 opm = ccw_device_get_path_mask(device->cdev);
995 ccw_device_get_schid(device->cdev, &sch_id);
998 /* get configuration data per operational path */
999 for (lpm = 0x80; lpm; lpm>>= 1) {
1002 rc = dasd_eckd_read_conf_lpm(device, &conf_data,
1004 if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */
1005 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1006 "Read configuration data returned "
1010 if (conf_data == NULL) {
1011 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1012 "No configuration data "
1014 /* no further analysis possible */
1015 dasd_path_add_opm(device, opm);
1016 continue; /* no error */
1018 /* save first valid configuration data */
1019 if (!conf_data_saved) {
1020 /* initially clear previously stored conf_data */
1021 dasd_eckd_clear_conf_data(device);
1022 private->conf_data = conf_data;
1023 private->conf_len = conf_len;
1024 if (dasd_eckd_identify_conf_parts(private)) {
1025 private->conf_data = NULL;
1026 private->conf_len = 0;
1030 pos = pathmask_to_pos(lpm);
1031 /* store per path conf_data */
1032 device->path[pos].conf_data = conf_data;
1033 device->path[pos].cssid = sch_id.cssid;
1034 device->path[pos].ssid = sch_id.ssid;
1035 chp_desc = ccw_device_get_chp_desc(device->cdev, pos);
1037 device->path[pos].chpid = chp_desc->chpid;
1040 * build device UID that other path data
1041 * can be compared to it
1043 dasd_eckd_generate_uid(device);
1046 path_private.conf_data = conf_data;
1047 path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE;
1048 if (dasd_eckd_identify_conf_parts(
1050 path_private.conf_data = NULL;
1051 path_private.conf_len = 0;
1055 if (dasd_eckd_compare_path_uid(
1056 device, &path_private)) {
1057 uid = &path_private.uid;
1058 if (strlen(uid->vduit) > 0)
1059 snprintf(print_path_uid,
1060 sizeof(print_path_uid),
1061 "%s.%s.%04x.%02x.%s",
1062 uid->vendor, uid->serial,
1063 uid->ssid, uid->real_unit_addr,
1066 snprintf(print_path_uid,
1067 sizeof(print_path_uid),
1069 uid->vendor, uid->serial,
1071 uid->real_unit_addr);
1072 uid = &private->uid;
1073 if (strlen(uid->vduit) > 0)
1074 snprintf(print_device_uid,
1075 sizeof(print_device_uid),
1076 "%s.%s.%04x.%02x.%s",
1077 uid->vendor, uid->serial,
1078 uid->ssid, uid->real_unit_addr,
1081 snprintf(print_device_uid,
1082 sizeof(print_device_uid),
1084 uid->vendor, uid->serial,
1086 uid->real_unit_addr);
1087 dev_err(&device->cdev->dev,
1088 "Not all channel paths lead to "
1089 "the same device, path %02X leads to "
1090 "device %s instead of %s\n", lpm,
1091 print_path_uid, print_device_uid);
1093 dasd_path_add_cablepm(device, lpm);
1096 pos = pathmask_to_pos(lpm);
1097 /* store per path conf_data */
1098 device->path[pos].conf_data = conf_data;
1099 device->path[pos].cssid = sch_id.cssid;
1100 device->path[pos].ssid = sch_id.ssid;
1101 chp_desc = ccw_device_get_chp_desc(device->cdev, pos);
1103 device->path[pos].chpid = chp_desc->chpid;
1105 path_private.conf_data = NULL;
1106 path_private.conf_len = 0;
1108 switch (dasd_eckd_path_access(conf_data, conf_len)) {
1110 dasd_path_add_nppm(device, lpm);
1113 dasd_path_add_ppm(device, lpm);
1116 if (!dasd_path_get_opm(device)) {
1117 dasd_path_set_opm(device, lpm);
1118 dasd_generic_path_operational(device);
1120 dasd_path_add_opm(device, lpm);
1127 static u32 get_fcx_max_data(struct dasd_device *device)
1129 struct dasd_eckd_private *private = device->private;
1130 int fcx_in_css, fcx_in_gneq, fcx_in_features;
1135 /* is transport mode supported? */
1136 fcx_in_css = css_general_characteristics.fcx;
1137 fcx_in_gneq = private->gneq->reserved2[7] & 0x04;
1138 fcx_in_features = private->features.feature[40] & 0x80;
1139 tpm = fcx_in_css && fcx_in_gneq && fcx_in_features;
1144 mdc = ccw_device_get_mdc(device->cdev, 0);
1146 dev_warn(&device->cdev->dev, "Detecting the maximum supported data size for zHPF requests failed\n");
1149 return (u32)mdc * FCX_MAX_DATA_FACTOR;
1153 static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm)
1155 struct dasd_eckd_private *private = device->private;
1159 if (private->fcx_max_data) {
1160 mdc = ccw_device_get_mdc(device->cdev, lpm);
1162 dev_warn(&device->cdev->dev,
1163 "Detecting the maximum data size for zHPF "
1164 "requests failed (rc=%d) for a new path %x\n",
1168 fcx_max_data = (u32)mdc * FCX_MAX_DATA_FACTOR;
1169 if (fcx_max_data < private->fcx_max_data) {
1170 dev_warn(&device->cdev->dev,
1171 "The maximum data size for zHPF requests %u "
1172 "on a new path %x is below the active maximum "
1173 "%u\n", fcx_max_data, lpm,
1174 private->fcx_max_data);
1181 static int rebuild_device_uid(struct dasd_device *device,
1182 struct path_verification_work_data *data)
1184 struct dasd_eckd_private *private = device->private;
1185 __u8 lpm, opm = dasd_path_get_opm(device);
1188 for (lpm = 0x80; lpm; lpm >>= 1) {
1191 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer));
1192 memset(&data->cqr, 0, sizeof(data->cqr));
1193 data->cqr.cpaddr = &data->ccw;
1194 rc = dasd_eckd_read_conf_immediately(device, &data->cqr,
1199 if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */
1201 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1202 "Read configuration data "
1203 "returned error %d", rc);
1206 memcpy(private->conf_data, data->rcd_buffer,
1207 DASD_ECKD_RCD_DATA_SIZE);
1208 if (dasd_eckd_identify_conf_parts(private)) {
1210 } else /* first valid path is enough */
1215 rc = dasd_eckd_generate_uid(device);
1220 static void do_path_verification_work(struct work_struct *work)
1222 struct path_verification_work_data *data;
1223 struct dasd_device *device;
1224 struct dasd_eckd_private path_private;
1225 struct dasd_uid *uid;
1226 __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE];
1227 __u8 lpm, opm, npm, ppm, epm, hpfpm, cablepm;
1228 unsigned long flags;
1232 data = container_of(work, struct path_verification_work_data, worker);
1233 device = data->device;
1235 /* delay path verification until device was resumed */
1236 if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) {
1237 schedule_work(work);
1240 /* check if path verification already running and delay if so */
1241 if (test_and_set_bit(DASD_FLAG_PATH_VERIFY, &device->flags)) {
1242 schedule_work(work);
1252 for (lpm = 0x80; lpm; lpm >>= 1) {
1253 if (!(lpm & data->tbvpm))
1255 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer));
1256 memset(&data->cqr, 0, sizeof(data->cqr));
1257 data->cqr.cpaddr = &data->ccw;
1258 rc = dasd_eckd_read_conf_immediately(device, &data->cqr,
1262 switch (dasd_eckd_path_access(data->rcd_buffer,
1263 DASD_ECKD_RCD_DATA_SIZE)
1273 } else if (rc == -EOPNOTSUPP) {
1274 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1275 "path verification: No configuration "
1278 } else if (rc == -EAGAIN) {
1279 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1280 "path verification: device is stopped,"
1281 " try again later");
1284 dev_warn(&device->cdev->dev,
1285 "Reading device feature codes failed "
1286 "(rc=%d) for new path %x\n", rc, lpm);
1289 if (verify_fcx_max_data(device, lpm)) {
1298 * save conf_data for comparison after
1299 * rebuild_device_uid may have changed
1302 memcpy(&path_rcd_buf, data->rcd_buffer,
1303 DASD_ECKD_RCD_DATA_SIZE);
1304 path_private.conf_data = (void *) &path_rcd_buf;
1305 path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE;
1306 if (dasd_eckd_identify_conf_parts(&path_private)) {
1307 path_private.conf_data = NULL;
1308 path_private.conf_len = 0;
1313 * compare path UID with device UID only if at least
1314 * one valid path is left
1315 * in other case the device UID may have changed and
1316 * the first working path UID will be used as device UID
1318 if (dasd_path_get_opm(device) &&
1319 dasd_eckd_compare_path_uid(device, &path_private)) {
1321 * the comparison was not successful
1322 * rebuild the device UID with at least one
1323 * known path in case a z/VM hyperswap command
1324 * has changed the device
1326 * after this compare again
1328 * if either the rebuild or the recompare fails
1329 * the path can not be used
1331 if (rebuild_device_uid(device, data) ||
1332 dasd_eckd_compare_path_uid(
1333 device, &path_private)) {
1334 uid = &path_private.uid;
1335 if (strlen(uid->vduit) > 0)
1336 snprintf(print_uid, sizeof(print_uid),
1337 "%s.%s.%04x.%02x.%s",
1338 uid->vendor, uid->serial,
1339 uid->ssid, uid->real_unit_addr,
1342 snprintf(print_uid, sizeof(print_uid),
1344 uid->vendor, uid->serial,
1346 uid->real_unit_addr);
1347 dev_err(&device->cdev->dev,
1348 "The newly added channel path %02X "
1349 "will not be used because it leads "
1350 "to a different device %s\n",
1361 * There is a small chance that a path is lost again between
1362 * above path verification and the following modification of
1363 * the device opm mask. We could avoid that race here by using
1364 * yet another path mask, but we rather deal with this unlikely
1365 * situation in dasd_start_IO.
1367 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
1368 if (!dasd_path_get_opm(device) && opm) {
1369 dasd_path_set_opm(device, opm);
1370 dasd_generic_path_operational(device);
1372 dasd_path_add_opm(device, opm);
1374 dasd_path_add_nppm(device, npm);
1375 dasd_path_add_ppm(device, ppm);
1376 dasd_path_add_tbvpm(device, epm);
1377 dasd_path_add_cablepm(device, cablepm);
1378 dasd_path_add_nohpfpm(device, hpfpm);
1379 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
1381 clear_bit(DASD_FLAG_PATH_VERIFY, &device->flags);
1382 dasd_put_device(device);
1384 mutex_unlock(&dasd_path_verification_mutex);
1389 static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm)
1391 struct path_verification_work_data *data;
1393 data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA);
1395 if (mutex_trylock(&dasd_path_verification_mutex)) {
1396 data = path_verification_worker;
1401 memset(data, 0, sizeof(*data));
1404 INIT_WORK(&data->worker, do_path_verification_work);
1405 dasd_get_device(device);
1406 data->device = device;
1408 schedule_work(&data->worker);
1412 static void dasd_eckd_reset_path(struct dasd_device *device, __u8 pm)
1414 struct dasd_eckd_private *private = device->private;
1415 unsigned long flags;
1417 if (!private->fcx_max_data)
1418 private->fcx_max_data = get_fcx_max_data(device);
1419 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
1420 dasd_path_set_tbvpm(device, pm ? : dasd_path_get_notoperpm(device));
1421 dasd_schedule_device_bh(device);
1422 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
1425 static int dasd_eckd_read_features(struct dasd_device *device)
1427 struct dasd_eckd_private *private = device->private;
1428 struct dasd_psf_prssd_data *prssdp;
1429 struct dasd_rssd_features *features;
1430 struct dasd_ccw_req *cqr;
1434 memset(&private->features, 0, sizeof(struct dasd_rssd_features));
1435 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
1436 (sizeof(struct dasd_psf_prssd_data) +
1437 sizeof(struct dasd_rssd_features)),
1440 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not "
1441 "allocate initialization request");
1442 return PTR_ERR(cqr);
1444 cqr->startdev = device;
1445 cqr->memdev = device;
1448 cqr->expires = 10 * HZ;
1450 /* Prepare for Read Subsystem Data */
1451 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
1452 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
1453 prssdp->order = PSF_ORDER_PRSSD;
1454 prssdp->suborder = 0x41; /* Read Feature Codes */
1455 /* all other bytes of prssdp must be zero */
1458 ccw->cmd_code = DASD_ECKD_CCW_PSF;
1459 ccw->count = sizeof(struct dasd_psf_prssd_data);
1460 ccw->flags |= CCW_FLAG_CC;
1461 ccw->cda = (__u32)(addr_t) prssdp;
1463 /* Read Subsystem Data - feature codes */
1464 features = (struct dasd_rssd_features *) (prssdp + 1);
1465 memset(features, 0, sizeof(struct dasd_rssd_features));
1468 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
1469 ccw->count = sizeof(struct dasd_rssd_features);
1470 ccw->cda = (__u32)(addr_t) features;
1472 cqr->buildclk = get_tod_clock();
1473 cqr->status = DASD_CQR_FILLED;
1474 rc = dasd_sleep_on(cqr);
1476 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
1477 features = (struct dasd_rssd_features *) (prssdp + 1);
1478 memcpy(&private->features, features,
1479 sizeof(struct dasd_rssd_features));
1481 dev_warn(&device->cdev->dev, "Reading device feature codes"
1482 " failed with rc=%d\n", rc);
1483 dasd_sfree_request(cqr, cqr->memdev);
1487 /* Read Volume Information - Volume Storage Query */
1488 static int dasd_eckd_read_vol_info(struct dasd_device *device)
1490 struct dasd_eckd_private *private = device->private;
1491 struct dasd_psf_prssd_data *prssdp;
1492 struct dasd_rssd_vsq *vsq;
1493 struct dasd_ccw_req *cqr;
1498 /* This command cannot be executed on an alias device */
1499 if (private->uid.type == UA_BASE_PAV_ALIAS ||
1500 private->uid.type == UA_HYPER_PAV_ALIAS)
1504 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 /* PSF + RSSD */,
1505 sizeof(*prssdp) + sizeof(*vsq), device, NULL);
1507 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1508 "Could not allocate initialization request");
1509 mutex_lock(&dasd_vol_info_mutex);
1511 cqr = &dasd_vol_info_req->cqr;
1512 memset(cqr, 0, sizeof(*cqr));
1513 memset(dasd_vol_info_req, 0, sizeof(*dasd_vol_info_req));
1514 cqr->cpaddr = &dasd_vol_info_req->ccw;
1515 cqr->data = &dasd_vol_info_req->data;
1516 cqr->magic = DASD_ECKD_MAGIC;
1519 /* Prepare for Read Subsystem Data */
1521 prssdp->order = PSF_ORDER_PRSSD;
1522 prssdp->suborder = PSF_SUBORDER_VSQ; /* Volume Storage Query */
1523 prssdp->lss = private->ned->ID;
1524 prssdp->volume = private->ned->unit_addr;
1527 ccw->cmd_code = DASD_ECKD_CCW_PSF;
1528 ccw->count = sizeof(*prssdp);
1529 ccw->flags |= CCW_FLAG_CC;
1530 ccw->cda = (__u32)(addr_t)prssdp;
1532 /* Read Subsystem Data - Volume Storage Query */
1533 vsq = (struct dasd_rssd_vsq *)(prssdp + 1);
1534 memset(vsq, 0, sizeof(*vsq));
1537 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
1538 ccw->count = sizeof(*vsq);
1539 ccw->flags |= CCW_FLAG_SLI;
1540 ccw->cda = (__u32)(addr_t)vsq;
1542 cqr->buildclk = get_tod_clock();
1543 cqr->status = DASD_CQR_FILLED;
1544 cqr->startdev = device;
1545 cqr->memdev = device;
1548 cqr->expires = device->default_expires * HZ;
1549 /* The command might not be supported. Suppress the error output */
1550 __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags);
1552 rc = dasd_sleep_on_interruptible(cqr);
1554 memcpy(&private->vsq, vsq, sizeof(*vsq));
1556 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1557 "Reading the volume storage information failed with rc=%d", rc);
1561 mutex_unlock(&dasd_vol_info_mutex);
1563 dasd_sfree_request(cqr, cqr->memdev);
1568 static int dasd_eckd_is_ese(struct dasd_device *device)
1570 struct dasd_eckd_private *private = device->private;
1572 return private->vsq.vol_info.ese;
1575 static int dasd_eckd_ext_pool_id(struct dasd_device *device)
1577 struct dasd_eckd_private *private = device->private;
1579 return private->vsq.extent_pool_id;
1583 * This value represents the total amount of available space. As more space is
1584 * allocated by ESE volumes, this value will decrease.
1585 * The data for this value is therefore updated on any call.
1587 static int dasd_eckd_space_configured(struct dasd_device *device)
1589 struct dasd_eckd_private *private = device->private;
1592 rc = dasd_eckd_read_vol_info(device);
1594 return rc ? : private->vsq.space_configured;
1598 * The value of space allocated by an ESE volume may have changed and is
1599 * therefore updated on any call.
1601 static int dasd_eckd_space_allocated(struct dasd_device *device)
1603 struct dasd_eckd_private *private = device->private;
1606 rc = dasd_eckd_read_vol_info(device);
1608 return rc ? : private->vsq.space_allocated;
1611 static int dasd_eckd_logical_capacity(struct dasd_device *device)
1613 struct dasd_eckd_private *private = device->private;
1615 return private->vsq.logical_capacity;
1618 static void dasd_eckd_ext_pool_exhaust_work(struct work_struct *work)
1620 struct ext_pool_exhaust_work_data *data;
1621 struct dasd_device *device;
1622 struct dasd_device *base;
1624 data = container_of(work, struct ext_pool_exhaust_work_data, worker);
1625 device = data->device;
1630 if (dasd_eckd_space_configured(base) != 0) {
1631 dasd_generic_space_avail(device);
1633 dev_warn(&device->cdev->dev, "No space left in the extent pool\n");
1634 DBF_DEV_EVENT(DBF_WARNING, device, "%s", "out of space");
1637 dasd_put_device(device);
1641 static int dasd_eckd_ext_pool_exhaust(struct dasd_device *device,
1642 struct dasd_ccw_req *cqr)
1644 struct ext_pool_exhaust_work_data *data;
1646 data = kzalloc(sizeof(*data), GFP_ATOMIC);
1649 INIT_WORK(&data->worker, dasd_eckd_ext_pool_exhaust_work);
1650 dasd_get_device(device);
1651 data->device = device;
1654 data->base = cqr->block->base;
1655 else if (cqr->basedev)
1656 data->base = cqr->basedev;
1660 schedule_work(&data->worker);
1665 static void dasd_eckd_cpy_ext_pool_data(struct dasd_device *device,
1666 struct dasd_rssd_lcq *lcq)
1668 struct dasd_eckd_private *private = device->private;
1669 int pool_id = dasd_eckd_ext_pool_id(device);
1670 struct dasd_ext_pool_sum eps;
1673 for (i = 0; i < lcq->pool_count; i++) {
1674 eps = lcq->ext_pool_sum[i];
1675 if (eps.pool_id == pool_id) {
1676 memcpy(&private->eps, &eps,
1677 sizeof(struct dasd_ext_pool_sum));
1682 /* Read Extent Pool Information - Logical Configuration Query */
1683 static int dasd_eckd_read_ext_pool_info(struct dasd_device *device)
1685 struct dasd_eckd_private *private = device->private;
1686 struct dasd_psf_prssd_data *prssdp;
1687 struct dasd_rssd_lcq *lcq;
1688 struct dasd_ccw_req *cqr;
1692 /* This command cannot be executed on an alias device */
1693 if (private->uid.type == UA_BASE_PAV_ALIAS ||
1694 private->uid.type == UA_HYPER_PAV_ALIAS)
1697 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 /* PSF + RSSD */,
1698 sizeof(*prssdp) + sizeof(*lcq), device, NULL);
1700 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1701 "Could not allocate initialization request");
1702 return PTR_ERR(cqr);
1705 /* Prepare for Read Subsystem Data */
1707 memset(prssdp, 0, sizeof(*prssdp));
1708 prssdp->order = PSF_ORDER_PRSSD;
1709 prssdp->suborder = PSF_SUBORDER_LCQ; /* Logical Configuration Query */
1712 ccw->cmd_code = DASD_ECKD_CCW_PSF;
1713 ccw->count = sizeof(*prssdp);
1714 ccw->flags |= CCW_FLAG_CC;
1715 ccw->cda = (__u32)(addr_t)prssdp;
1717 lcq = (struct dasd_rssd_lcq *)(prssdp + 1);
1718 memset(lcq, 0, sizeof(*lcq));
1721 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
1722 ccw->count = sizeof(*lcq);
1723 ccw->flags |= CCW_FLAG_SLI;
1724 ccw->cda = (__u32)(addr_t)lcq;
1726 cqr->buildclk = get_tod_clock();
1727 cqr->status = DASD_CQR_FILLED;
1728 cqr->startdev = device;
1729 cqr->memdev = device;
1732 cqr->expires = device->default_expires * HZ;
1733 /* The command might not be supported. Suppress the error output */
1734 __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags);
1736 rc = dasd_sleep_on_interruptible(cqr);
1738 dasd_eckd_cpy_ext_pool_data(device, lcq);
1740 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1741 "Reading the logical configuration failed with rc=%d", rc);
1744 dasd_sfree_request(cqr, cqr->memdev);
1750 * Depending on the device type, the extent size is specified either as
1751 * cylinders per extent (CKD) or size per extent (FBA)
1752 * A 1GB size corresponds to 1113cyl, and 16MB to 21cyl.
1754 static int dasd_eckd_ext_size(struct dasd_device *device)
1756 struct dasd_eckd_private *private = device->private;
1757 struct dasd_ext_pool_sum eps = private->eps;
1759 if (!eps.flags.extent_size_valid)
1761 if (eps.extent_size.size_1G)
1763 if (eps.extent_size.size_16M)
1769 static int dasd_eckd_ext_pool_warn_thrshld(struct dasd_device *device)
1771 struct dasd_eckd_private *private = device->private;
1773 return private->eps.warn_thrshld;
1776 static int dasd_eckd_ext_pool_cap_at_warnlevel(struct dasd_device *device)
1778 struct dasd_eckd_private *private = device->private;
1780 return private->eps.flags.capacity_at_warnlevel;
1784 * Extent Pool out of space
1786 static int dasd_eckd_ext_pool_oos(struct dasd_device *device)
1788 struct dasd_eckd_private *private = device->private;
1790 return private->eps.flags.pool_oos;
1794 * Build CP for Perform Subsystem Function - SSC.
1796 static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device,
1799 struct dasd_ccw_req *cqr;
1800 struct dasd_psf_ssc_data *psf_ssc_data;
1803 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ ,
1804 sizeof(struct dasd_psf_ssc_data),
1808 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1809 "Could not allocate PSF-SSC request");
1812 psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data;
1813 psf_ssc_data->order = PSF_ORDER_SSC;
1814 psf_ssc_data->suborder = 0xc0;
1816 psf_ssc_data->suborder |= 0x08;
1817 psf_ssc_data->reserved[0] = 0x88;
1820 ccw->cmd_code = DASD_ECKD_CCW_PSF;
1821 ccw->cda = (__u32)(addr_t)psf_ssc_data;
1824 cqr->startdev = device;
1825 cqr->memdev = device;
1828 cqr->expires = 10*HZ;
1829 cqr->buildclk = get_tod_clock();
1830 cqr->status = DASD_CQR_FILLED;
1835 * Perform Subsystem Function.
1836 * It is necessary to trigger CIO for channel revalidation since this
1837 * call might change behaviour of DASD devices.
1840 dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav,
1841 unsigned long flags)
1843 struct dasd_ccw_req *cqr;
1846 cqr = dasd_eckd_build_psf_ssc(device, enable_pav);
1848 return PTR_ERR(cqr);
1851 * set flags e.g. turn on failfast, to prevent blocking
1852 * the calling function should handle failed requests
1854 cqr->flags |= flags;
1856 rc = dasd_sleep_on(cqr);
1858 /* trigger CIO to reprobe devices */
1859 css_schedule_reprobe();
1860 else if (cqr->intrc == -EAGAIN)
1863 dasd_sfree_request(cqr, cqr->memdev);
1868 * Valide storage server of current device.
1870 static int dasd_eckd_validate_server(struct dasd_device *device,
1871 unsigned long flags)
1873 struct dasd_eckd_private *private = device->private;
1876 if (private->uid.type == UA_BASE_PAV_ALIAS ||
1877 private->uid.type == UA_HYPER_PAV_ALIAS)
1879 if (dasd_nopav || MACHINE_IS_VM)
1883 rc = dasd_eckd_psf_ssc(device, enable_pav, flags);
1885 /* may be requested feature is not available on server,
1886 * therefore just report error and go ahead */
1887 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x "
1888 "returned rc=%d", private->uid.ssid, rc);
1893 * worker to do a validate server in case of a lost pathgroup
1895 static void dasd_eckd_do_validate_server(struct work_struct *work)
1897 struct dasd_device *device = container_of(work, struct dasd_device,
1899 unsigned long flags = 0;
1901 set_bit(DASD_CQR_FLAGS_FAILFAST, &flags);
1902 if (dasd_eckd_validate_server(device, flags)
1904 /* schedule worker again if failed */
1905 schedule_work(&device->kick_validate);
1909 dasd_put_device(device);
1912 static void dasd_eckd_kick_validate_server(struct dasd_device *device)
1914 dasd_get_device(device);
1915 /* exit if device not online or in offline processing */
1916 if (test_bit(DASD_FLAG_OFFLINE, &device->flags) ||
1917 device->state < DASD_STATE_ONLINE) {
1918 dasd_put_device(device);
1921 /* queue call to do_validate_server to the kernel event daemon. */
1922 if (!schedule_work(&device->kick_validate))
1923 dasd_put_device(device);
1927 * Check device characteristics.
1928 * If the device is accessible using ECKD discipline, the device is enabled.
1931 dasd_eckd_check_characteristics(struct dasd_device *device)
1933 struct dasd_eckd_private *private = device->private;
1934 struct dasd_block *block;
1935 struct dasd_uid temp_uid;
1938 unsigned long value;
1940 /* setup work queue for validate server*/
1941 INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server);
1942 /* setup work queue for summary unit check */
1943 INIT_WORK(&device->suc_work, dasd_alias_handle_summary_unit_check);
1945 if (!ccw_device_is_pathgroup(device->cdev)) {
1946 dev_warn(&device->cdev->dev,
1947 "A channel path group could not be established\n");
1950 if (!ccw_device_is_multipath(device->cdev)) {
1951 dev_info(&device->cdev->dev,
1952 "The DASD is not operating in multipath mode\n");
1955 private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA);
1957 dev_warn(&device->cdev->dev,
1958 "Allocating memory for private DASD data "
1962 device->private = private;
1964 memset(private, 0, sizeof(*private));
1966 /* Invalidate status of initial analysis. */
1967 private->init_cqr_status = -1;
1968 /* Set default cache operations. */
1969 private->attrib.operation = DASD_NORMAL_CACHE;
1970 private->attrib.nr_cyl = 0;
1972 /* Read Configuration Data */
1973 rc = dasd_eckd_read_conf(device);
1977 /* set some default values */
1978 device->default_expires = DASD_EXPIRES;
1979 device->default_retries = DASD_RETRIES;
1980 device->path_thrhld = DASD_ECKD_PATH_THRHLD;
1981 device->path_interval = DASD_ECKD_PATH_INTERVAL;
1983 if (private->gneq) {
1985 for (i = 0; i < private->gneq->timeout.value; i++)
1987 value = value * private->gneq->timeout.number;
1988 /* do not accept useless values */
1989 if (value != 0 && value <= DASD_EXPIRES_MAX)
1990 device->default_expires = value;
1993 dasd_eckd_get_uid(device, &temp_uid);
1994 if (temp_uid.type == UA_BASE_DEVICE) {
1995 block = dasd_alloc_block();
1996 if (IS_ERR(block)) {
1997 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1998 "could not allocate dasd "
2000 rc = PTR_ERR(block);
2003 device->block = block;
2004 block->base = device;
2007 /* register lcu with alias handling, enable PAV */
2008 rc = dasd_alias_make_device_known_to_lcu(device);
2012 dasd_eckd_validate_server(device, 0);
2014 /* device may report different configuration data after LCU setup */
2015 rc = dasd_eckd_read_conf(device);
2019 /* Read Feature Codes */
2020 dasd_eckd_read_features(device);
2022 /* Read Volume Information */
2023 dasd_eckd_read_vol_info(device);
2025 /* Read Extent Pool Information */
2026 dasd_eckd_read_ext_pool_info(device);
2028 /* Read Device Characteristics */
2029 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
2030 &private->rdc_data, 64);
2032 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
2033 "Read device characteristic failed, rc=%d", rc);
2037 if ((device->features & DASD_FEATURE_USERAW) &&
2038 !(private->rdc_data.facilities.RT_in_LR)) {
2039 dev_err(&device->cdev->dev, "The storage server does not "
2040 "support raw-track access\n");
2045 /* find the valid cylinder size */
2046 if (private->rdc_data.no_cyl == LV_COMPAT_CYL &&
2047 private->rdc_data.long_no_cyl)
2048 private->real_cyl = private->rdc_data.long_no_cyl;
2050 private->real_cyl = private->rdc_data.no_cyl;
2052 private->fcx_max_data = get_fcx_max_data(device);
2054 readonly = dasd_device_is_ro(device);
2056 set_bit(DASD_FLAG_DEVICE_RO, &device->flags);
2058 dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) "
2059 "with %d cylinders, %d heads, %d sectors%s\n",
2060 private->rdc_data.dev_type,
2061 private->rdc_data.dev_model,
2062 private->rdc_data.cu_type,
2063 private->rdc_data.cu_model.model,
2065 private->rdc_data.trk_per_cyl,
2066 private->rdc_data.sec_per_trk,
2067 readonly ? ", read-only device" : "");
2071 dasd_alias_disconnect_device_from_lcu(device);
2073 dasd_free_block(device->block);
2074 device->block = NULL;
2076 kfree(private->conf_data);
2077 kfree(device->private);
2078 device->private = NULL;
2082 static void dasd_eckd_uncheck_device(struct dasd_device *device)
2084 struct dasd_eckd_private *private = device->private;
2090 dasd_alias_disconnect_device_from_lcu(device);
2091 private->ned = NULL;
2092 private->sneq = NULL;
2093 private->vdsneq = NULL;
2094 private->gneq = NULL;
2095 private->conf_len = 0;
2096 for (i = 0; i < 8; i++) {
2097 kfree(device->path[i].conf_data);
2098 if ((__u8 *)device->path[i].conf_data ==
2099 private->conf_data) {
2100 private->conf_data = NULL;
2101 private->conf_len = 0;
2103 device->path[i].conf_data = NULL;
2104 device->path[i].cssid = 0;
2105 device->path[i].ssid = 0;
2106 device->path[i].chpid = 0;
2108 kfree(private->conf_data);
2109 private->conf_data = NULL;
2112 static struct dasd_ccw_req *
2113 dasd_eckd_analysis_ccw(struct dasd_device *device)
2115 struct dasd_eckd_private *private = device->private;
2116 struct eckd_count *count_data;
2117 struct LO_eckd_data *LO_data;
2118 struct dasd_ccw_req *cqr;
2120 int cplength, datasize;
2124 datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data);
2125 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device,
2130 /* Define extent for the first 2 tracks. */
2131 define_extent(ccw++, cqr->data, 0, 1,
2132 DASD_ECKD_CCW_READ_COUNT, device, 0);
2133 LO_data = cqr->data + sizeof(struct DE_eckd_data);
2134 /* Locate record for the first 4 records on track 0. */
2135 ccw[-1].flags |= CCW_FLAG_CC;
2136 locate_record(ccw++, LO_data++, 0, 0, 4,
2137 DASD_ECKD_CCW_READ_COUNT, device, 0);
2139 count_data = private->count_area;
2140 for (i = 0; i < 4; i++) {
2141 ccw[-1].flags |= CCW_FLAG_CC;
2142 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
2145 ccw->cda = (__u32)(addr_t) count_data;
2150 /* Locate record for the first record on track 1. */
2151 ccw[-1].flags |= CCW_FLAG_CC;
2152 locate_record(ccw++, LO_data++, 1, 0, 1,
2153 DASD_ECKD_CCW_READ_COUNT, device, 0);
2154 /* Read count ccw. */
2155 ccw[-1].flags |= CCW_FLAG_CC;
2156 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
2159 ccw->cda = (__u32)(addr_t) count_data;
2162 cqr->startdev = device;
2163 cqr->memdev = device;
2165 cqr->buildclk = get_tod_clock();
2166 cqr->status = DASD_CQR_FILLED;
2167 /* Set flags to suppress output for expected errors */
2168 set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags);
2173 /* differentiate between 'no record found' and any other error */
2174 static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr)
2177 if (init_cqr->status == DASD_CQR_DONE)
2179 else if (init_cqr->status == DASD_CQR_NEED_ERP ||
2180 init_cqr->status == DASD_CQR_FAILED) {
2181 sense = dasd_get_sense(&init_cqr->irb);
2182 if (sense && (sense[1] & SNS1_NO_REC_FOUND))
2183 return INIT_CQR_UNFORMATTED;
2185 return INIT_CQR_ERROR;
2187 return INIT_CQR_ERROR;
2191 * This is the callback function for the init_analysis cqr. It saves
2192 * the status of the initial analysis ccw before it frees it and kicks
2193 * the device to continue the startup sequence. This will call
2194 * dasd_eckd_do_analysis again (if the devices has not been marked
2195 * for deletion in the meantime).
2197 static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr,
2200 struct dasd_device *device = init_cqr->startdev;
2201 struct dasd_eckd_private *private = device->private;
2203 private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr);
2204 dasd_sfree_request(init_cqr, device);
2205 dasd_kick_device(device);
2208 static int dasd_eckd_start_analysis(struct dasd_block *block)
2210 struct dasd_ccw_req *init_cqr;
2212 init_cqr = dasd_eckd_analysis_ccw(block->base);
2213 if (IS_ERR(init_cqr))
2214 return PTR_ERR(init_cqr);
2215 init_cqr->callback = dasd_eckd_analysis_callback;
2216 init_cqr->callback_data = NULL;
2217 init_cqr->expires = 5*HZ;
2218 /* first try without ERP, so we can later handle unformatted
2219 * devices as special case
2221 clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags);
2222 init_cqr->retries = 0;
2223 dasd_add_request_head(init_cqr);
2227 static int dasd_eckd_end_analysis(struct dasd_block *block)
2229 struct dasd_device *device = block->base;
2230 struct dasd_eckd_private *private = device->private;
2231 struct eckd_count *count_area;
2232 unsigned int sb, blk_per_trk;
2234 struct dasd_ccw_req *init_cqr;
2236 status = private->init_cqr_status;
2237 private->init_cqr_status = -1;
2238 if (status == INIT_CQR_ERROR) {
2239 /* try again, this time with full ERP */
2240 init_cqr = dasd_eckd_analysis_ccw(device);
2241 dasd_sleep_on(init_cqr);
2242 status = dasd_eckd_analysis_evaluation(init_cqr);
2243 dasd_sfree_request(init_cqr, device);
2246 if (device->features & DASD_FEATURE_USERAW) {
2247 block->bp_block = DASD_RAW_BLOCKSIZE;
2248 blk_per_trk = DASD_RAW_BLOCK_PER_TRACK;
2249 block->s2b_shift = 3;
2253 if (status == INIT_CQR_UNFORMATTED) {
2254 dev_warn(&device->cdev->dev, "The DASD is not formatted\n");
2255 return -EMEDIUMTYPE;
2256 } else if (status == INIT_CQR_ERROR) {
2257 dev_err(&device->cdev->dev,
2258 "Detecting the DASD disk layout failed because "
2259 "of an I/O error\n");
2263 private->uses_cdl = 1;
2264 /* Check Track 0 for Compatible Disk Layout */
2266 for (i = 0; i < 3; i++) {
2267 if (private->count_area[i].kl != 4 ||
2268 private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 ||
2269 private->count_area[i].cyl != 0 ||
2270 private->count_area[i].head != count_area_head[i] ||
2271 private->count_area[i].record != count_area_rec[i]) {
2272 private->uses_cdl = 0;
2277 count_area = &private->count_area[3];
2279 if (private->uses_cdl == 0) {
2280 for (i = 0; i < 5; i++) {
2281 if ((private->count_area[i].kl != 0) ||
2282 (private->count_area[i].dl !=
2283 private->count_area[0].dl) ||
2284 private->count_area[i].cyl != 0 ||
2285 private->count_area[i].head != count_area_head[i] ||
2286 private->count_area[i].record != count_area_rec[i])
2290 count_area = &private->count_area[0];
2292 if (private->count_area[3].record == 1)
2293 dev_warn(&device->cdev->dev,
2294 "Track 0 has no records following the VTOC\n");
2297 if (count_area != NULL && count_area->kl == 0) {
2298 /* we found notthing violating our disk layout */
2299 if (dasd_check_blocksize(count_area->dl) == 0)
2300 block->bp_block = count_area->dl;
2302 if (block->bp_block == 0) {
2303 dev_warn(&device->cdev->dev,
2304 "The disk layout of the DASD is not supported\n");
2305 return -EMEDIUMTYPE;
2307 block->s2b_shift = 0; /* bits to shift 512 to get a block */
2308 for (sb = 512; sb < block->bp_block; sb = sb << 1)
2311 blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block);
2314 block->blocks = ((unsigned long) private->real_cyl *
2315 private->rdc_data.trk_per_cyl *
2318 dev_info(&device->cdev->dev,
2319 "DASD with %u KB/block, %lu KB total size, %u KB/track, "
2320 "%s\n", (block->bp_block >> 10),
2321 (((unsigned long) private->real_cyl *
2322 private->rdc_data.trk_per_cyl *
2323 blk_per_trk * (block->bp_block >> 9)) >> 1),
2324 ((blk_per_trk * block->bp_block) >> 10),
2326 "compatible disk layout" : "linux disk layout");
2331 static int dasd_eckd_do_analysis(struct dasd_block *block)
2333 struct dasd_eckd_private *private = block->base->private;
2335 if (private->init_cqr_status < 0)
2336 return dasd_eckd_start_analysis(block);
2338 return dasd_eckd_end_analysis(block);
2341 static int dasd_eckd_basic_to_ready(struct dasd_device *device)
2343 return dasd_alias_add_device(device);
2346 static int dasd_eckd_online_to_ready(struct dasd_device *device)
2348 if (cancel_work_sync(&device->reload_device))
2349 dasd_put_device(device);
2350 if (cancel_work_sync(&device->kick_validate))
2351 dasd_put_device(device);
2356 static int dasd_eckd_basic_to_known(struct dasd_device *device)
2358 return dasd_alias_remove_device(device);
2362 dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo)
2364 struct dasd_eckd_private *private = block->base->private;
2366 if (dasd_check_blocksize(block->bp_block) == 0) {
2367 geo->sectors = recs_per_track(&private->rdc_data,
2368 0, block->bp_block);
2370 geo->cylinders = private->rdc_data.no_cyl;
2371 geo->heads = private->rdc_data.trk_per_cyl;
2376 * Build the TCW request for the format check
2378 static struct dasd_ccw_req *
2379 dasd_eckd_build_check_tcw(struct dasd_device *base, struct format_data_t *fdata,
2380 int enable_pav, struct eckd_count *fmt_buffer,
2383 struct dasd_eckd_private *start_priv;
2384 struct dasd_device *startdev = NULL;
2385 struct tidaw *last_tidaw = NULL;
2386 struct dasd_ccw_req *cqr;
2394 startdev = dasd_alias_get_start_dev(base);
2399 start_priv = startdev->private;
2401 count = rpt * (fdata->stop_unit - fdata->start_unit + 1);
2404 * we're adding 'count' amount of tidaw to the itcw.
2405 * calculate the corresponding itcw_size
2407 itcw_size = itcw_calc_size(0, count, 0);
2409 cqr = dasd_fmalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev);
2413 start_priv->count++;
2415 itcw = itcw_init(cqr->data, itcw_size, ITCW_OP_READ, 0, count, 0);
2421 cqr->cpaddr = itcw_get_tcw(itcw);
2422 rc = prepare_itcw(itcw, fdata->start_unit, fdata->stop_unit,
2423 DASD_ECKD_CCW_READ_COUNT_MT, base, startdev, 0, count,
2424 sizeof(struct eckd_count),
2425 count * sizeof(struct eckd_count), 0, rpt);
2429 for (i = 0; i < count; i++) {
2430 last_tidaw = itcw_add_tidaw(itcw, 0, fmt_buffer++,
2431 sizeof(struct eckd_count));
2432 if (IS_ERR(last_tidaw)) {
2438 last_tidaw->flags |= TIDAW_FLAGS_LAST;
2439 itcw_finalize(itcw);
2442 cqr->startdev = startdev;
2443 cqr->memdev = startdev;
2444 cqr->basedev = base;
2445 cqr->retries = startdev->default_retries;
2446 cqr->expires = startdev->default_expires * HZ;
2447 cqr->buildclk = get_tod_clock();
2448 cqr->status = DASD_CQR_FILLED;
2449 /* Set flags to suppress output for expected errors */
2450 set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags);
2451 set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags);
2456 dasd_sfree_request(cqr, startdev);
2462 * Build the CCW request for the format check
2464 static struct dasd_ccw_req *
2465 dasd_eckd_build_check(struct dasd_device *base, struct format_data_t *fdata,
2466 int enable_pav, struct eckd_count *fmt_buffer, int rpt)
2468 struct dasd_eckd_private *start_priv;
2469 struct dasd_eckd_private *base_priv;
2470 struct dasd_device *startdev = NULL;
2471 struct dasd_ccw_req *cqr;
2474 int cplength, datasize;
2480 startdev = dasd_alias_get_start_dev(base);
2485 start_priv = startdev->private;
2486 base_priv = base->private;
2488 count = rpt * (fdata->stop_unit - fdata->start_unit + 1);
2490 use_prefix = base_priv->features.feature[8] & 0x01;
2494 datasize = sizeof(struct PFX_eckd_data);
2497 datasize = sizeof(struct DE_eckd_data) +
2498 sizeof(struct LO_eckd_data);
2502 cqr = dasd_fmalloc_request(DASD_ECKD_MAGIC, cplength, datasize, startdev);
2506 start_priv->count++;
2511 prefix_LRE(ccw++, data, fdata->start_unit, fdata->stop_unit,
2512 DASD_ECKD_CCW_READ_COUNT, base, startdev, 1, 0,
2515 define_extent(ccw++, data, fdata->start_unit, fdata->stop_unit,
2516 DASD_ECKD_CCW_READ_COUNT, startdev, 0);
2518 data += sizeof(struct DE_eckd_data);
2519 ccw[-1].flags |= CCW_FLAG_CC;
2521 locate_record(ccw++, data, fdata->start_unit, 0, count,
2522 DASD_ECKD_CCW_READ_COUNT, base, 0);
2525 for (i = 0; i < count; i++) {
2526 ccw[-1].flags |= CCW_FLAG_CC;
2527 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
2528 ccw->flags = CCW_FLAG_SLI;
2530 ccw->cda = (__u32)(addr_t) fmt_buffer;
2535 cqr->startdev = startdev;
2536 cqr->memdev = startdev;
2537 cqr->basedev = base;
2538 cqr->retries = DASD_RETRIES;
2539 cqr->expires = startdev->default_expires * HZ;
2540 cqr->buildclk = get_tod_clock();
2541 cqr->status = DASD_CQR_FILLED;
2542 /* Set flags to suppress output for expected errors */
2543 set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags);
2548 static struct dasd_ccw_req *
2549 dasd_eckd_build_format(struct dasd_device *base, struct dasd_device *startdev,
2550 struct format_data_t *fdata, int enable_pav)
2552 struct dasd_eckd_private *base_priv;
2553 struct dasd_eckd_private *start_priv;
2554 struct dasd_ccw_req *fcp;
2555 struct eckd_count *ect;
2556 struct ch_t address;
2560 int cplength, datasize;
2568 startdev = dasd_alias_get_start_dev(base);
2573 start_priv = startdev->private;
2574 base_priv = base->private;
2576 rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize);
2578 nr_tracks = fdata->stop_unit - fdata->start_unit + 1;
2581 * fdata->intensity is a bit string that tells us what to do:
2582 * Bit 0: write record zero
2583 * Bit 1: write home address, currently not supported
2584 * Bit 2: invalidate tracks
2585 * Bit 3: use OS/390 compatible disk layout (cdl)
2586 * Bit 4: do not allow storage subsystem to modify record zero
2587 * Only some bit combinations do make sense.
2589 if (fdata->intensity & 0x10) {
2591 intensity = fdata->intensity & ~0x10;
2594 intensity = fdata->intensity;
2597 use_prefix = base_priv->features.feature[8] & 0x01;
2599 switch (intensity) {
2600 case 0x00: /* Normal format */
2601 case 0x08: /* Normal format, use cdl. */
2602 cplength = 2 + (rpt*nr_tracks);
2604 datasize = sizeof(struct PFX_eckd_data) +
2605 sizeof(struct LO_eckd_data) +
2606 rpt * nr_tracks * sizeof(struct eckd_count);
2608 datasize = sizeof(struct DE_eckd_data) +
2609 sizeof(struct LO_eckd_data) +
2610 rpt * nr_tracks * sizeof(struct eckd_count);
2612 case 0x01: /* Write record zero and format track. */
2613 case 0x09: /* Write record zero and format track, use cdl. */
2614 cplength = 2 + rpt * nr_tracks;
2616 datasize = sizeof(struct PFX_eckd_data) +
2617 sizeof(struct LO_eckd_data) +
2618 sizeof(struct eckd_count) +
2619 rpt * nr_tracks * sizeof(struct eckd_count);
2621 datasize = sizeof(struct DE_eckd_data) +
2622 sizeof(struct LO_eckd_data) +
2623 sizeof(struct eckd_count) +
2624 rpt * nr_tracks * sizeof(struct eckd_count);
2626 case 0x04: /* Invalidate track. */
2627 case 0x0c: /* Invalidate track, use cdl. */
2630 datasize = sizeof(struct PFX_eckd_data) +
2631 sizeof(struct LO_eckd_data) +
2632 sizeof(struct eckd_count);
2634 datasize = sizeof(struct DE_eckd_data) +
2635 sizeof(struct LO_eckd_data) +
2636 sizeof(struct eckd_count);
2639 dev_warn(&startdev->cdev->dev,
2640 "An I/O control call used incorrect flags 0x%x\n",
2642 return ERR_PTR(-EINVAL);
2645 fcp = dasd_fmalloc_request(DASD_ECKD_MAGIC, cplength, datasize, startdev);
2649 start_priv->count++;
2653 switch (intensity & ~0x08) {
2654 case 0x00: /* Normal format. */
2656 prefix(ccw++, (struct PFX_eckd_data *) data,
2657 fdata->start_unit, fdata->stop_unit,
2658 DASD_ECKD_CCW_WRITE_CKD, base, startdev);
2659 /* grant subsystem permission to format R0 */
2661 ((struct PFX_eckd_data *)data)
2662 ->define_extent.ga_extended |= 0x04;
2663 data += sizeof(struct PFX_eckd_data);
2665 define_extent(ccw++, (struct DE_eckd_data *) data,
2666 fdata->start_unit, fdata->stop_unit,
2667 DASD_ECKD_CCW_WRITE_CKD, startdev, 0);
2668 /* grant subsystem permission to format R0 */
2670 ((struct DE_eckd_data *) data)
2671 ->ga_extended |= 0x04;
2672 data += sizeof(struct DE_eckd_data);
2674 ccw[-1].flags |= CCW_FLAG_CC;
2675 locate_record(ccw++, (struct LO_eckd_data *) data,
2676 fdata->start_unit, 0, rpt*nr_tracks,
2677 DASD_ECKD_CCW_WRITE_CKD, base,
2679 data += sizeof(struct LO_eckd_data);
2681 case 0x01: /* Write record zero + format track. */
2683 prefix(ccw++, (struct PFX_eckd_data *) data,
2684 fdata->start_unit, fdata->stop_unit,
2685 DASD_ECKD_CCW_WRITE_RECORD_ZERO,
2687 data += sizeof(struct PFX_eckd_data);
2689 define_extent(ccw++, (struct DE_eckd_data *) data,
2690 fdata->start_unit, fdata->stop_unit,
2691 DASD_ECKD_CCW_WRITE_RECORD_ZERO, startdev, 0);
2692 data += sizeof(struct DE_eckd_data);
2694 ccw[-1].flags |= CCW_FLAG_CC;
2695 locate_record(ccw++, (struct LO_eckd_data *) data,
2696 fdata->start_unit, 0, rpt * nr_tracks + 1,
2697 DASD_ECKD_CCW_WRITE_RECORD_ZERO, base,
2698 base->block->bp_block);
2699 data += sizeof(struct LO_eckd_data);
2701 case 0x04: /* Invalidate track. */
2703 prefix(ccw++, (struct PFX_eckd_data *) data,
2704 fdata->start_unit, fdata->stop_unit,
2705 DASD_ECKD_CCW_WRITE_CKD, base, startdev);
2706 data += sizeof(struct PFX_eckd_data);
2708 define_extent(ccw++, (struct DE_eckd_data *) data,
2709 fdata->start_unit, fdata->stop_unit,
2710 DASD_ECKD_CCW_WRITE_CKD, startdev, 0);
2711 data += sizeof(struct DE_eckd_data);
2713 ccw[-1].flags |= CCW_FLAG_CC;
2714 locate_record(ccw++, (struct LO_eckd_data *) data,
2715 fdata->start_unit, 0, 1,
2716 DASD_ECKD_CCW_WRITE_CKD, base, 8);
2717 data += sizeof(struct LO_eckd_data);
2721 for (j = 0; j < nr_tracks; j++) {
2722 /* calculate cylinder and head for the current track */
2724 (fdata->start_unit + j) /
2725 base_priv->rdc_data.trk_per_cyl,
2726 (fdata->start_unit + j) %
2727 base_priv->rdc_data.trk_per_cyl);
2728 if (intensity & 0x01) { /* write record zero */
2729 ect = (struct eckd_count *) data;
2730 data += sizeof(struct eckd_count);
2731 ect->cyl = address.cyl;
2732 ect->head = address.head;
2736 ccw[-1].flags |= CCW_FLAG_CC;
2737 ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO;
2738 ccw->flags = CCW_FLAG_SLI;
2740 ccw->cda = (__u32)(addr_t) ect;
2743 if ((intensity & ~0x08) & 0x04) { /* erase track */
2744 ect = (struct eckd_count *) data;
2745 data += sizeof(struct eckd_count);
2746 ect->cyl = address.cyl;
2747 ect->head = address.head;
2751 ccw[-1].flags |= CCW_FLAG_CC;
2752 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD;
2753 ccw->flags = CCW_FLAG_SLI;
2755 ccw->cda = (__u32)(addr_t) ect;
2756 } else { /* write remaining records */
2757 for (i = 0; i < rpt; i++) {
2758 ect = (struct eckd_count *) data;
2759 data += sizeof(struct eckd_count);
2760 ect->cyl = address.cyl;
2761 ect->head = address.head;
2762 ect->record = i + 1;
2764 ect->dl = fdata->blksize;
2766 * Check for special tracks 0-1
2767 * when formatting CDL
2769 if ((intensity & 0x08) &&
2770 address.cyl == 0 && address.head == 0) {
2773 ect->dl = sizes_trk0[i] - 4;
2776 if ((intensity & 0x08) &&
2777 address.cyl == 0 && address.head == 1) {
2779 ect->dl = LABEL_SIZE - 44;
2781 ccw[-1].flags |= CCW_FLAG_CC;
2782 if (i != 0 || j == 0)
2784 DASD_ECKD_CCW_WRITE_CKD;
2787 DASD_ECKD_CCW_WRITE_CKD_MT;
2788 ccw->flags = CCW_FLAG_SLI;
2790 ccw->cda = (__u32)(addr_t) ect;
2796 fcp->startdev = startdev;
2797 fcp->memdev = startdev;
2798 fcp->basedev = base;
2800 fcp->expires = startdev->default_expires * HZ;
2801 fcp->buildclk = get_tod_clock();
2802 fcp->status = DASD_CQR_FILLED;
2808 * Wrapper function to build a CCW request depending on input data
2810 static struct dasd_ccw_req *
2811 dasd_eckd_format_build_ccw_req(struct dasd_device *base,
2812 struct format_data_t *fdata, int enable_pav,
2813 int tpm, struct eckd_count *fmt_buffer, int rpt)
2815 struct dasd_ccw_req *ccw_req;
2818 ccw_req = dasd_eckd_build_format(base, NULL, fdata, enable_pav);
2821 ccw_req = dasd_eckd_build_check_tcw(base, fdata,
2825 ccw_req = dasd_eckd_build_check(base, fdata, enable_pav,
2833 * Sanity checks on format_data
2835 static int dasd_eckd_format_sanity_checks(struct dasd_device *base,
2836 struct format_data_t *fdata)
2838 struct dasd_eckd_private *private = base->private;
2840 if (fdata->start_unit >=
2841 (private->real_cyl * private->rdc_data.trk_per_cyl)) {
2842 dev_warn(&base->cdev->dev,
2843 "Start track number %u used in formatting is too big\n",
2847 if (fdata->stop_unit >=
2848 (private->real_cyl * private->rdc_data.trk_per_cyl)) {
2849 dev_warn(&base->cdev->dev,
2850 "Stop track number %u used in formatting is too big\n",
2854 if (fdata->start_unit > fdata->stop_unit) {
2855 dev_warn(&base->cdev->dev,
2856 "Start track %u used in formatting exceeds end track\n",
2860 if (dasd_check_blocksize(fdata->blksize) != 0) {
2861 dev_warn(&base->cdev->dev,
2862 "The DASD cannot be formatted with block size %u\n",
2870 * This function will process format_data originally coming from an IOCTL
2872 static int dasd_eckd_format_process_data(struct dasd_device *base,
2873 struct format_data_t *fdata,
2874 int enable_pav, int tpm,
2875 struct eckd_count *fmt_buffer, int rpt,
2878 struct dasd_eckd_private *private = base->private;
2879 struct dasd_ccw_req *cqr, *n;
2880 struct list_head format_queue;
2881 struct dasd_device *device;
2883 int old_start, old_stop, format_step;
2887 rc = dasd_eckd_format_sanity_checks(base, fdata);
2891 INIT_LIST_HEAD(&format_queue);
2893 old_start = fdata->start_unit;
2894 old_stop = fdata->stop_unit;
2896 if (!tpm && fmt_buffer != NULL) {
2897 /* Command Mode / Format Check */
2899 } else if (tpm && fmt_buffer != NULL) {
2900 /* Transport Mode / Format Check */
2901 format_step = DASD_CQR_MAX_CCW / rpt;
2903 /* Normal Formatting */
2904 format_step = DASD_CQR_MAX_CCW /
2905 recs_per_track(&private->rdc_data, 0, fdata->blksize);
2910 while (fdata->start_unit <= old_stop) {
2911 step = fdata->stop_unit - fdata->start_unit + 1;
2912 if (step > format_step) {
2914 fdata->start_unit + format_step - 1;
2917 cqr = dasd_eckd_format_build_ccw_req(base, fdata,
2922 if (rc == -ENOMEM) {
2923 if (list_empty(&format_queue))
2926 * not enough memory available, start
2927 * requests retry after first requests
2935 list_add_tail(&cqr->blocklist, &format_queue);
2938 step = fdata->stop_unit - fdata->start_unit + 1;
2939 fmt_buffer += rpt * step;
2941 fdata->start_unit = fdata->stop_unit + 1;
2942 fdata->stop_unit = old_stop;
2945 rc = dasd_sleep_on_queue(&format_queue);
2948 list_for_each_entry_safe(cqr, n, &format_queue, blocklist) {
2949 device = cqr->startdev;
2950 private = device->private;
2952 if (cqr->status == DASD_CQR_FAILED) {
2954 * Only get sense data if called by format
2957 if (fmt_buffer && irb) {
2958 sense = dasd_get_sense(&cqr->irb);
2959 memcpy(irb, &cqr->irb, sizeof(*irb));
2963 list_del_init(&cqr->blocklist);
2964 dasd_ffree_request(cqr, device);
2968 if (rc && rc != -EIO)
2972 * In case fewer than the expected records are on the
2973 * track, we will most likely get a 'No Record Found'
2974 * error (in command mode) or a 'File Protected' error
2975 * (in transport mode). Those particular cases shouldn't
2976 * pass the -EIO to the IOCTL, therefore reset the rc
2980 (sense[1] & SNS1_NO_REC_FOUND ||
2981 sense[1] & SNS1_FILE_PROTECTED))
2990 fdata->start_unit = old_start;
2991 fdata->stop_unit = old_stop;
2996 static int dasd_eckd_format_device(struct dasd_device *base,
2997 struct format_data_t *fdata, int enable_pav)
2999 return dasd_eckd_format_process_data(base, fdata, enable_pav, 0, NULL,
3004 * Callback function to free ESE format requests.
3006 static void dasd_eckd_ese_format_cb(struct dasd_ccw_req *cqr, void *data)
3008 struct dasd_device *device = cqr->startdev;
3009 struct dasd_eckd_private *private = device->private;
3012 dasd_ffree_request(cqr, device);
3015 static struct dasd_ccw_req *
3016 dasd_eckd_ese_format(struct dasd_device *startdev, struct dasd_ccw_req *cqr)
3018 struct dasd_eckd_private *private;
3019 struct format_data_t fdata;
3020 unsigned int recs_per_trk;
3021 struct dasd_ccw_req *fcqr;
3022 struct dasd_device *base;
3023 struct dasd_block *block;
3024 unsigned int blksize;
3025 struct request *req;
3030 req = cqr->callback_data;
3031 base = cqr->block->base;
3032 private = base->private;
3033 block = base->block;
3034 blksize = block->bp_block;
3035 recs_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
3037 first_trk = blk_rq_pos(req) >> block->s2b_shift;
3038 sector_div(first_trk, recs_per_trk);
3040 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift;
3041 sector_div(last_trk, recs_per_trk);
3043 fdata.start_unit = first_trk;
3044 fdata.stop_unit = last_trk;
3045 fdata.blksize = blksize;
3046 fdata.intensity = private->uses_cdl ? DASD_FMT_INT_COMPAT : 0;
3048 rc = dasd_eckd_format_sanity_checks(base, &fdata);
3050 return ERR_PTR(-EINVAL);
3053 * We're building the request with PAV disabled as we're reusing
3054 * the former startdev.
3056 fcqr = dasd_eckd_build_format(base, startdev, &fdata, 0);
3060 fcqr->callback = dasd_eckd_ese_format_cb;
3066 * When data is read from an unformatted area of an ESE volume, this function
3067 * returns zeroed data and thereby mimics a read of zero data.
3069 static void dasd_eckd_ese_read(struct dasd_ccw_req *cqr)
3071 unsigned int blksize, off;
3072 struct dasd_device *base;
3073 struct req_iterator iter;
3074 struct request *req;
3078 req = (struct request *) cqr->callback_data;
3079 base = cqr->block->base;
3080 blksize = base->block->bp_block;
3082 rq_for_each_segment(bv, req, iter) {
3083 dst = page_address(bv.bv_page) + bv.bv_offset;
3084 for (off = 0; off < bv.bv_len; off += blksize) {
3085 if (dst && rq_data_dir(req) == READ) {
3087 memset(dst, 0, blksize);
3094 * Helper function to count consecutive records of a single track.
3096 static int dasd_eckd_count_records(struct eckd_count *fmt_buffer, int start,
3102 head = fmt_buffer[start].head;
3105 * There are 3 conditions where we stop counting:
3106 * - if data reoccurs (same head and record may reoccur), which may
3107 * happen due to the way DASD_ECKD_CCW_READ_COUNT works
3108 * - when the head changes, because we're iterating over several tracks
3109 * then (DASD_ECKD_CCW_READ_COUNT_MT)
3110 * - when we've reached the end of sensible data in the buffer (the
3111 * record will be 0 then)
3113 for (i = start; i < max; i++) {
3115 if ((fmt_buffer[i].head == head &&
3116 fmt_buffer[i].record == 1) ||
3117 fmt_buffer[i].head != head ||
3118 fmt_buffer[i].record == 0)
3127 * Evaluate a given range of tracks. Data like number of records, blocksize,
3128 * record ids, and key length are compared with expected data.
3130 * If a mismatch occurs, the corresponding error bit is set, as well as
3131 * additional information, depending on the error.
3133 static void dasd_eckd_format_evaluate_tracks(struct eckd_count *fmt_buffer,
3134 struct format_check_t *cdata,
3135 int rpt_max, int rpt_exp,
3136 int trk_per_cyl, int tpm)
3147 trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1;
3148 max_entries = trkcount * rpt_max;
3150 for (i = cdata->expect.start_unit; i <= cdata->expect.stop_unit; i++) {
3151 /* Calculate the correct next starting position in the buffer */
3153 while (fmt_buffer[pos].record == 0 &&
3154 fmt_buffer[pos].dl == 0) {
3155 if (pos++ > max_entries)
3159 if (i != cdata->expect.start_unit)
3160 pos += rpt_max - count;
3163 /* Calculate the expected geo values for the current track */
3164 set_ch_t(&geo, i / trk_per_cyl, i % trk_per_cyl);
3166 /* Count and check number of records */
3167 count = dasd_eckd_count_records(fmt_buffer, pos, pos + rpt_max);
3169 if (count < rpt_exp) {
3170 cdata->result = DASD_FMT_ERR_TOO_FEW_RECORDS;
3173 if (count > rpt_exp) {
3174 cdata->result = DASD_FMT_ERR_TOO_MANY_RECORDS;
3178 for (j = 0; j < count; j++, pos++) {
3179 blksize = cdata->expect.blksize;
3183 * Set special values when checking CDL formatted
3186 if ((cdata->expect.intensity & 0x08) &&
3187 geo.cyl == 0 && geo.head == 0) {
3189 blksize = sizes_trk0[j] - 4;
3193 if ((cdata->expect.intensity & 0x08) &&
3194 geo.cyl == 0 && geo.head == 1) {
3195 blksize = LABEL_SIZE - 44;
3199 /* Check blocksize */
3200 if (fmt_buffer[pos].dl != blksize) {
3201 cdata->result = DASD_FMT_ERR_BLKSIZE;
3204 /* Check if key length is 0 */
3205 if (fmt_buffer[pos].kl != kl) {
3206 cdata->result = DASD_FMT_ERR_KEY_LENGTH;
3209 /* Check if record_id is correct */
3210 if (fmt_buffer[pos].cyl != geo.cyl ||
3211 fmt_buffer[pos].head != geo.head ||
3212 fmt_buffer[pos].record != (j + 1)) {
3213 cdata->result = DASD_FMT_ERR_RECORD_ID;
3221 * In case of no errors, we need to decrease by one
3222 * to get the correct positions.
3224 if (!cdata->result) {
3230 cdata->num_records = count;
3231 cdata->rec = fmt_buffer[pos].record;
3232 cdata->blksize = fmt_buffer[pos].dl;
3233 cdata->key_length = fmt_buffer[pos].kl;
3237 * Check the format of a range of tracks of a DASD.
3239 static int dasd_eckd_check_device_format(struct dasd_device *base,
3240 struct format_check_t *cdata,
3243 struct dasd_eckd_private *private = base->private;
3244 struct eckd_count *fmt_buffer;
3246 int rpt_max, rpt_exp;
3247 int fmt_buffer_size;
3253 trk_per_cyl = private->rdc_data.trk_per_cyl;
3255 /* Get maximum and expected amount of records per track */
3256 rpt_max = recs_per_track(&private->rdc_data, 0, 512) + 1;
3257 rpt_exp = recs_per_track(&private->rdc_data, 0, cdata->expect.blksize);
3259 trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1;
3260 fmt_buffer_size = trkcount * rpt_max * sizeof(struct eckd_count);
3262 fmt_buffer = kzalloc(fmt_buffer_size, GFP_KERNEL | GFP_DMA);
3267 * A certain FICON feature subset is needed to operate in transport
3268 * mode. Additionally, the support for transport mode is implicitly
3269 * checked by comparing the buffer size with fcx_max_data. As long as
3270 * the buffer size is smaller we can operate in transport mode and
3271 * process multiple tracks. If not, only one track at once is being
3272 * processed using command mode.
3274 if ((private->features.feature[40] & 0x04) &&
3275 fmt_buffer_size <= private->fcx_max_data)
3278 rc = dasd_eckd_format_process_data(base, &cdata->expect, enable_pav,
3279 tpm, fmt_buffer, rpt_max, &irb);
3280 if (rc && rc != -EIO)
3284 * If our first attempt with transport mode enabled comes back
3285 * with an incorrect length error, we're going to retry the
3286 * check with command mode.
3288 if (tpm && scsw_cstat(&irb.scsw) == 0x40) {
3290 rc = dasd_eckd_format_process_data(base, &cdata->expect,
3292 fmt_buffer, rpt_max,
3301 dasd_eckd_format_evaluate_tracks(fmt_buffer, cdata, rpt_max, rpt_exp,
3310 static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr)
3312 if (cqr->retries < 0) {
3313 cqr->status = DASD_CQR_FAILED;
3316 cqr->status = DASD_CQR_FILLED;
3317 if (cqr->block && (cqr->startdev != cqr->block->base)) {
3318 dasd_eckd_reset_ccw_to_base_io(cqr);
3319 cqr->startdev = cqr->block->base;
3320 cqr->lpm = dasd_path_get_opm(cqr->block->base);
3324 static dasd_erp_fn_t
3325 dasd_eckd_erp_action(struct dasd_ccw_req * cqr)
3327 struct dasd_device *device = (struct dasd_device *) cqr->startdev;
3328 struct ccw_device *cdev = device->cdev;
3330 switch (cdev->id.cu_type) {
3335 return dasd_3990_erp_action;
3339 return dasd_default_erp_action;
3343 static dasd_erp_fn_t
3344 dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr)
3346 return dasd_default_erp_postaction;
3349 static void dasd_eckd_check_for_device_change(struct dasd_device *device,
3350 struct dasd_ccw_req *cqr,
3355 struct dasd_eckd_private *private = device->private;
3357 /* first of all check for state change pending interrupt */
3358 mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP;
3359 if ((scsw_dstat(&irb->scsw) & mask) == mask) {
3361 * for alias only, not in offline processing
3362 * and only if not suspended
3364 if (!device->block && private->lcu &&
3365 device->state == DASD_STATE_ONLINE &&
3366 !test_bit(DASD_FLAG_OFFLINE, &device->flags) &&
3367 !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) {
3368 /* schedule worker to reload device */
3369 dasd_reload_device(device);
3371 dasd_generic_handle_state_change(device);
3375 sense = dasd_get_sense(irb);
3379 /* summary unit check */
3380 if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) &&
3381 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) {
3382 if (test_and_set_bit(DASD_FLAG_SUC, &device->flags)) {
3383 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
3384 "eckd suc: device already notified");
3387 sense = dasd_get_sense(irb);
3389 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
3390 "eckd suc: no reason code available");
3391 clear_bit(DASD_FLAG_SUC, &device->flags);
3395 private->suc_reason = sense[8];
3396 DBF_DEV_EVENT(DBF_NOTICE, device, "%s %x",
3397 "eckd handle summary unit check: reason",
3398 private->suc_reason);
3399 dasd_get_device(device);
3400 if (!schedule_work(&device->suc_work))
3401 dasd_put_device(device);
3406 /* service information message SIM */
3407 if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) &&
3408 ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) {
3409 dasd_3990_erp_handle_sim(device, sense);
3413 /* loss of device reservation is handled via base devices only
3414 * as alias devices may be used with several bases
3416 if (device->block && (sense[27] & DASD_SENSE_BIT_0) &&
3417 (sense[7] == 0x3F) &&
3418 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) &&
3419 test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) {
3420 if (device->features & DASD_FEATURE_FAILONSLCK)
3421 set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags);
3422 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags);
3423 dev_err(&device->cdev->dev,
3424 "The device reservation was lost\n");
3428 static int dasd_eckd_ras_sanity_checks(struct dasd_device *device,
3429 unsigned int first_trk,
3430 unsigned int last_trk)
3432 struct dasd_eckd_private *private = device->private;
3433 unsigned int trks_per_vol;
3436 trks_per_vol = private->real_cyl * private->rdc_data.trk_per_cyl;
3438 if (first_trk >= trks_per_vol) {
3439 dev_warn(&device->cdev->dev,
3440 "Start track number %u used in the space release command is too big\n",
3443 } else if (last_trk >= trks_per_vol) {
3444 dev_warn(&device->cdev->dev,
3445 "Stop track number %u used in the space release command is too big\n",
3448 } else if (first_trk > last_trk) {
3449 dev_warn(&device->cdev->dev,
3450 "Start track %u used in the space release command exceeds the end track\n",
3458 * Helper function to count the amount of involved extents within a given range
3459 * with extent alignment in mind.
3461 static int count_exts(unsigned int from, unsigned int to, int trks_per_ext)
3470 /* Count first partial extent */
3471 if (from % trks_per_ext != 0) {
3472 tmp = from + trks_per_ext - (from % trks_per_ext) - 1;
3475 cur_pos = tmp - from + 1;
3478 /* Count full extents */
3479 if (to - (from + cur_pos) + 1 >= trks_per_ext) {
3480 tmp = to - ((to - trks_per_ext + 1) % trks_per_ext);
3481 count += (tmp - (from + cur_pos) + 1) / trks_per_ext;
3484 /* Count last partial extent */
3492 * Release allocated space for a given range or an entire volume.
3494 static struct dasd_ccw_req *
3495 dasd_eckd_dso_ras(struct dasd_device *device, struct dasd_block *block,
3496 struct request *req, unsigned int first_trk,
3497 unsigned int last_trk, int by_extent)
3499 struct dasd_eckd_private *private = device->private;
3500 struct dasd_dso_ras_ext_range *ras_range;
3501 struct dasd_rssd_features *features;
3502 struct dasd_dso_ras_data *ras_data;
3503 u16 heads, beg_head, end_head;
3504 int cur_to_trk, cur_from_trk;
3505 struct dasd_ccw_req *cqr;
3506 u32 beg_cyl, end_cyl;
3515 if (dasd_eckd_ras_sanity_checks(device, first_trk, last_trk))
3516 return ERR_PTR(-EINVAL);
3518 rq = req ? blk_mq_rq_to_pdu(req) : NULL;
3520 features = &private->features;
3522 trks_per_ext = dasd_eckd_ext_size(device) * private->rdc_data.trk_per_cyl;
3525 nr_exts = count_exts(first_trk, last_trk, trks_per_ext);
3526 ras_size = sizeof(*ras_data);
3527 size = ras_size + (nr_exts * sizeof(*ras_range));
3529 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, size, device, rq);
3531 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
3532 "Could not allocate RAS request");
3536 ras_data = cqr->data;
3537 memset(ras_data, 0, size);
3539 ras_data->order = DSO_ORDER_RAS;
3540 ras_data->flags.vol_type = 0; /* CKD volume */
3541 /* Release specified extents or entire volume */
3542 ras_data->op_flags.by_extent = by_extent;
3544 * This bit guarantees initialisation of tracks within an extent that is
3545 * not fully specified, but is only supported with a certain feature
3548 ras_data->op_flags.guarantee_init = !!(features->feature[56] & 0x01);
3549 ras_data->lss = private->ned->ID;
3550 ras_data->dev_addr = private->ned->unit_addr;
3551 ras_data->nr_exts = nr_exts;
3554 heads = private->rdc_data.trk_per_cyl;
3555 cur_from_trk = first_trk;
3556 cur_to_trk = first_trk + trks_per_ext -
3557 (first_trk % trks_per_ext) - 1;
3558 if (cur_to_trk > last_trk)
3559 cur_to_trk = last_trk;
3560 ras_range = (struct dasd_dso_ras_ext_range *)(cqr->data + ras_size);
3562 for (i = 0; i < nr_exts; i++) {
3563 beg_cyl = cur_from_trk / heads;
3564 beg_head = cur_from_trk % heads;
3565 end_cyl = cur_to_trk / heads;
3566 end_head = cur_to_trk % heads;
3568 set_ch_t(&ras_range->beg_ext, beg_cyl, beg_head);
3569 set_ch_t(&ras_range->end_ext, end_cyl, end_head);
3571 cur_from_trk = cur_to_trk + 1;
3572 cur_to_trk = cur_from_trk + trks_per_ext - 1;
3573 if (cur_to_trk > last_trk)
3574 cur_to_trk = last_trk;
3580 ccw->cda = (__u32)(addr_t)cqr->data;
3581 ccw->cmd_code = DASD_ECKD_CCW_DSO;
3584 cqr->startdev = device;
3585 cqr->memdev = device;
3588 cqr->expires = device->default_expires * HZ;
3589 cqr->buildclk = get_tod_clock();
3590 cqr->status = DASD_CQR_FILLED;
3595 static int dasd_eckd_release_space_full(struct dasd_device *device)
3597 struct dasd_ccw_req *cqr;
3600 cqr = dasd_eckd_dso_ras(device, NULL, NULL, 0, 0, 0);
3602 return PTR_ERR(cqr);
3604 rc = dasd_sleep_on_interruptible(cqr);
3606 dasd_sfree_request(cqr, cqr->memdev);
3611 static int dasd_eckd_release_space_trks(struct dasd_device *device,
3612 unsigned int from, unsigned int to)
3614 struct dasd_eckd_private *private = device->private;
3615 struct dasd_block *block = device->block;
3616 struct dasd_ccw_req *cqr, *n;
3617 struct list_head ras_queue;
3618 unsigned int device_exts;
3625 INIT_LIST_HEAD(&ras_queue);
3627 device_exts = private->real_cyl / dasd_eckd_ext_size(device);
3628 trks_per_ext = dasd_eckd_ext_size(device) * private->rdc_data.trk_per_cyl;
3630 /* Make sure device limits are not exceeded */
3631 step = trks_per_ext * min(device_exts, DASD_ECKD_RAS_EXTS_MAX);
3636 while (cur_pos < to) {
3637 stop = cur_pos + step -
3638 ((cur_pos + step) % trks_per_ext) - 1;
3642 cqr = dasd_eckd_dso_ras(device, NULL, NULL, cur_pos, stop, 1);
3645 if (rc == -ENOMEM) {
3646 if (list_empty(&ras_queue))
3654 spin_lock_irq(&block->queue_lock);
3655 list_add_tail(&cqr->blocklist, &ras_queue);
3656 spin_unlock_irq(&block->queue_lock);
3660 rc = dasd_sleep_on_queue_interruptible(&ras_queue);
3663 list_for_each_entry_safe(cqr, n, &ras_queue, blocklist) {
3664 device = cqr->startdev;
3665 private = device->private;
3667 spin_lock_irq(&block->queue_lock);
3668 list_del_init(&cqr->blocklist);
3669 spin_unlock_irq(&block->queue_lock);
3670 dasd_sfree_request(cqr, device);
3679 static int dasd_eckd_release_space(struct dasd_device *device,
3680 struct format_data_t *rdata)
3682 if (rdata->intensity & DASD_FMT_INT_ESE_FULL)
3683 return dasd_eckd_release_space_full(device);
3684 else if (rdata->intensity == 0)
3685 return dasd_eckd_release_space_trks(device, rdata->start_unit,
3691 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single(
3692 struct dasd_device *startdev,
3693 struct dasd_block *block,
3694 struct request *req,
3699 unsigned int first_offs,
3700 unsigned int last_offs,
3701 unsigned int blk_per_trk,
3702 unsigned int blksize)
3704 struct dasd_eckd_private *private;
3705 unsigned long *idaws;
3706 struct LO_eckd_data *LO_data;
3707 struct dasd_ccw_req *cqr;
3709 struct req_iterator iter;
3713 int count, cidaw, cplength, datasize;
3715 unsigned char cmd, rcmd;
3717 struct dasd_device *basedev;
3719 basedev = block->base;
3720 private = basedev->private;
3721 if (rq_data_dir(req) == READ)
3722 cmd = DASD_ECKD_CCW_READ_MT;
3723 else if (rq_data_dir(req) == WRITE)
3724 cmd = DASD_ECKD_CCW_WRITE_MT;
3726 return ERR_PTR(-EINVAL);
3728 /* Check struct bio and count the number of blocks for the request. */
3731 rq_for_each_segment(bv, req, iter) {
3732 if (bv.bv_len & (blksize - 1))
3733 /* Eckd can only do full blocks. */
3734 return ERR_PTR(-EINVAL);
3735 count += bv.bv_len >> (block->s2b_shift + 9);
3736 if (idal_is_needed (page_address(bv.bv_page), bv.bv_len))
3737 cidaw += bv.bv_len >> (block->s2b_shift + 9);
3740 if (count != last_rec - first_rec + 1)
3741 return ERR_PTR(-EINVAL);
3743 /* use the prefix command if available */
3744 use_prefix = private->features.feature[8] & 0x01;
3746 /* 1x prefix + number of blocks */
3747 cplength = 2 + count;
3748 /* 1x prefix + cidaws*sizeof(long) */
3749 datasize = sizeof(struct PFX_eckd_data) +
3750 sizeof(struct LO_eckd_data) +
3751 cidaw * sizeof(unsigned long);
3753 /* 1x define extent + 1x locate record + number of blocks */
3754 cplength = 2 + count;
3755 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */
3756 datasize = sizeof(struct DE_eckd_data) +
3757 sizeof(struct LO_eckd_data) +
3758 cidaw * sizeof(unsigned long);
3760 /* Find out the number of additional locate record ccws for cdl. */
3761 if (private->uses_cdl && first_rec < 2*blk_per_trk) {
3762 if (last_rec >= 2*blk_per_trk)
3763 count = 2*blk_per_trk - first_rec;
3765 datasize += count*sizeof(struct LO_eckd_data);
3767 /* Allocate the ccw request. */
3768 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
3769 startdev, blk_mq_rq_to_pdu(req));
3773 /* First ccw is define extent or prefix. */
3775 if (prefix(ccw++, cqr->data, first_trk,
3776 last_trk, cmd, basedev, startdev) == -EAGAIN) {
3777 /* Clock not in sync and XRC is enabled.
3780 dasd_sfree_request(cqr, startdev);
3781 return ERR_PTR(-EAGAIN);
3783 idaws = (unsigned long *) (cqr->data +
3784 sizeof(struct PFX_eckd_data));
3786 if (define_extent(ccw++, cqr->data, first_trk,
3787 last_trk, cmd, basedev, 0) == -EAGAIN) {
3788 /* Clock not in sync and XRC is enabled.
3791 dasd_sfree_request(cqr, startdev);
3792 return ERR_PTR(-EAGAIN);
3794 idaws = (unsigned long *) (cqr->data +
3795 sizeof(struct DE_eckd_data));
3797 /* Build locate_record+read/write/ccws. */
3798 LO_data = (struct LO_eckd_data *) (idaws + cidaw);
3800 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) {
3801 /* Only standard blocks so there is just one locate record. */
3802 ccw[-1].flags |= CCW_FLAG_CC;
3803 locate_record(ccw++, LO_data++, first_trk, first_offs + 1,
3804 last_rec - recid + 1, cmd, basedev, blksize);
3806 rq_for_each_segment(bv, req, iter) {
3807 dst = page_address(bv.bv_page) + bv.bv_offset;
3808 if (dasd_page_cache) {
3809 char *copy = kmem_cache_alloc(dasd_page_cache,
3810 GFP_DMA | __GFP_NOWARN);
3811 if (copy && rq_data_dir(req) == WRITE)
3812 memcpy(copy + bv.bv_offset, dst, bv.bv_len);
3814 dst = copy + bv.bv_offset;
3816 for (off = 0; off < bv.bv_len; off += blksize) {
3817 sector_t trkid = recid;
3818 unsigned int recoffs = sector_div(trkid, blk_per_trk);
3821 /* Locate record for cdl special block ? */
3822 if (private->uses_cdl && recid < 2*blk_per_trk) {
3823 if (dasd_eckd_cdl_special(blk_per_trk, recid)){
3825 count = dasd_eckd_cdl_reclen(recid);
3826 if (count < blksize &&
3827 rq_data_dir(req) == READ)
3828 memset(dst + count, 0xe5,
3831 ccw[-1].flags |= CCW_FLAG_CC;
3832 locate_record(ccw++, LO_data++,
3834 1, rcmd, basedev, count);
3836 /* Locate record for standard blocks ? */
3837 if (private->uses_cdl && recid == 2*blk_per_trk) {
3838 ccw[-1].flags |= CCW_FLAG_CC;
3839 locate_record(ccw++, LO_data++,
3841 last_rec - recid + 1,
3842 cmd, basedev, count);
3844 /* Read/write ccw. */
3845 ccw[-1].flags |= CCW_FLAG_CC;
3846 ccw->cmd_code = rcmd;
3848 if (idal_is_needed(dst, blksize)) {
3849 ccw->cda = (__u32)(addr_t) idaws;
3850 ccw->flags = CCW_FLAG_IDA;
3851 idaws = idal_create_words(idaws, dst, blksize);
3853 ccw->cda = (__u32)(addr_t) dst;
3861 if (blk_noretry_request(req) ||
3862 block->base->features & DASD_FEATURE_FAILFAST)
3863 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
3864 cqr->startdev = startdev;
3865 cqr->memdev = startdev;
3867 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
3868 cqr->lpm = dasd_path_get_ppm(startdev);
3869 cqr->retries = startdev->default_retries;
3870 cqr->buildclk = get_tod_clock();
3871 cqr->status = DASD_CQR_FILLED;
3873 /* Set flags to suppress output for expected errors */
3874 if (dasd_eckd_is_ese(basedev)) {
3875 set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags);
3876 set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags);
3877 set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags);
3883 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track(
3884 struct dasd_device *startdev,
3885 struct dasd_block *block,
3886 struct request *req,
3891 unsigned int first_offs,
3892 unsigned int last_offs,
3893 unsigned int blk_per_trk,
3894 unsigned int blksize)
3896 unsigned long *idaws;
3897 struct dasd_ccw_req *cqr;
3899 struct req_iterator iter;
3901 char *dst, *idaw_dst;
3902 unsigned int cidaw, cplength, datasize;
3906 struct dasd_device *basedev;
3907 unsigned int trkcount, count, count_to_trk_end;
3908 unsigned int idaw_len, seg_len, part_len, len_to_track_end;
3909 unsigned char new_track, end_idaw;
3911 unsigned int recoffs;
3913 basedev = block->base;
3914 if (rq_data_dir(req) == READ)
3915 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
3916 else if (rq_data_dir(req) == WRITE)
3917 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
3919 return ERR_PTR(-EINVAL);
3921 /* Track based I/O needs IDAWs for each page, and not just for
3922 * 64 bit addresses. We need additional idals for pages
3923 * that get filled from two tracks, so we use the number
3924 * of records as upper limit.
3926 cidaw = last_rec - first_rec + 1;
3927 trkcount = last_trk - first_trk + 1;
3929 /* 1x prefix + one read/write ccw per track */
3930 cplength = 1 + trkcount;
3932 datasize = sizeof(struct PFX_eckd_data) + cidaw * sizeof(unsigned long);
3934 /* Allocate the ccw request. */
3935 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
3936 startdev, blk_mq_rq_to_pdu(req));
3940 /* transfer length factor: how many bytes to read from the last track */
3941 if (first_trk == last_trk)
3942 tlf = last_offs - first_offs + 1;
3944 tlf = last_offs + 1;
3947 if (prefix_LRE(ccw++, cqr->data, first_trk,
3948 last_trk, cmd, basedev, startdev,
3949 1 /* format */, first_offs + 1,
3952 /* Clock not in sync and XRC is enabled.
3955 dasd_sfree_request(cqr, startdev);
3956 return ERR_PTR(-EAGAIN);
3960 * The translation of request into ccw programs must meet the
3961 * following conditions:
3962 * - all idaws but the first and the last must address full pages
3963 * (or 2K blocks on 31-bit)
3964 * - the scope of a ccw and it's idal ends with the track boundaries
3966 idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data));
3970 len_to_track_end = 0;
3973 rq_for_each_segment(bv, req, iter) {
3974 dst = page_address(bv.bv_page) + bv.bv_offset;
3975 seg_len = bv.bv_len;
3979 recoffs = sector_div(trkid, blk_per_trk);
3980 count_to_trk_end = blk_per_trk - recoffs;
3981 count = min((last_rec - recid + 1),
3982 (sector_t)count_to_trk_end);
3983 len_to_track_end = count * blksize;
3984 ccw[-1].flags |= CCW_FLAG_CC;
3985 ccw->cmd_code = cmd;
3986 ccw->count = len_to_track_end;
3987 ccw->cda = (__u32)(addr_t)idaws;
3988 ccw->flags = CCW_FLAG_IDA;
3992 /* first idaw for a ccw may start anywhere */
3996 /* If we start a new idaw, we must make sure that it
3997 * starts on an IDA_BLOCK_SIZE boundary.
3998 * If we continue an idaw, we must make sure that the
3999 * current segment begins where the so far accumulated
4003 if (__pa(dst) & (IDA_BLOCK_SIZE-1)) {
4004 dasd_sfree_request(cqr, startdev);
4005 return ERR_PTR(-ERANGE);
4009 if ((idaw_dst + idaw_len) != dst) {
4010 dasd_sfree_request(cqr, startdev);
4011 return ERR_PTR(-ERANGE);
4013 part_len = min(seg_len, len_to_track_end);
4014 seg_len -= part_len;
4016 idaw_len += part_len;
4017 len_to_track_end -= part_len;
4018 /* collected memory area ends on an IDA_BLOCK border,
4020 * idal_create_words will handle cases where idaw_len
4021 * is larger then IDA_BLOCK_SIZE
4023 if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1)))
4025 /* We also need to end the idaw at track end */
4026 if (!len_to_track_end) {
4031 idaws = idal_create_words(idaws, idaw_dst,
4040 if (blk_noretry_request(req) ||
4041 block->base->features & DASD_FEATURE_FAILFAST)
4042 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
4043 cqr->startdev = startdev;
4044 cqr->memdev = startdev;
4046 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
4047 cqr->lpm = dasd_path_get_ppm(startdev);
4048 cqr->retries = startdev->default_retries;
4049 cqr->buildclk = get_tod_clock();
4050 cqr->status = DASD_CQR_FILLED;
4052 /* Set flags to suppress output for expected errors */
4053 if (dasd_eckd_is_ese(basedev))
4054 set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags);
4059 static int prepare_itcw(struct itcw *itcw,
4060 unsigned int trk, unsigned int totrk, int cmd,
4061 struct dasd_device *basedev,
4062 struct dasd_device *startdev,
4063 unsigned int rec_on_trk, int count,
4064 unsigned int blksize,
4065 unsigned int total_data_size,
4067 unsigned int blk_per_trk)
4069 struct PFX_eckd_data pfxdata;
4070 struct dasd_eckd_private *basepriv, *startpriv;
4071 struct DE_eckd_data *dedata;
4072 struct LRE_eckd_data *lredata;
4076 u16 heads, beghead, endhead;
4084 /* setup prefix data */
4085 basepriv = basedev->private;
4086 startpriv = startdev->private;
4087 dedata = &pfxdata.define_extent;
4088 lredata = &pfxdata.locate_record;
4090 memset(&pfxdata, 0, sizeof(pfxdata));
4091 pfxdata.format = 1; /* PFX with LRE */
4092 pfxdata.base_address = basepriv->ned->unit_addr;
4093 pfxdata.base_lss = basepriv->ned->ID;
4094 pfxdata.validity.define_extent = 1;
4096 /* private uid is kept up to date, conf_data may be outdated */
4097 if (startpriv->uid.type == UA_BASE_PAV_ALIAS)
4098 pfxdata.validity.verify_base = 1;
4100 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) {
4101 pfxdata.validity.verify_base = 1;
4102 pfxdata.validity.hyper_pav = 1;
4106 case DASD_ECKD_CCW_READ_TRACK_DATA:
4107 dedata->mask.perm = 0x1;
4108 dedata->attributes.operation = basepriv->attrib.operation;
4109 dedata->blk_size = blksize;
4110 dedata->ga_extended |= 0x42;
4111 lredata->operation.orientation = 0x0;
4112 lredata->operation.operation = 0x0C;
4113 lredata->auxiliary.check_bytes = 0x01;
4114 pfx_cmd = DASD_ECKD_CCW_PFX_READ;
4116 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
4117 dedata->mask.perm = 0x02;
4118 dedata->attributes.operation = basepriv->attrib.operation;
4119 dedata->blk_size = blksize;
4120 rc = set_timestamp(NULL, dedata, basedev);
4121 dedata->ga_extended |= 0x42;
4122 lredata->operation.orientation = 0x0;
4123 lredata->operation.operation = 0x3F;
4124 lredata->extended_operation = 0x23;
4125 lredata->auxiliary.check_bytes = 0x2;
4127 * If XRC is supported the System Time Stamp is set. The
4128 * validity of the time stamp must be reflected in the prefix
4131 if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02)
4132 pfxdata.validity.time_stamp = 1; /* 'Time Stamp Valid' */
4133 pfx_cmd = DASD_ECKD_CCW_PFX;
4135 case DASD_ECKD_CCW_READ_COUNT_MT:
4136 dedata->mask.perm = 0x1;
4137 dedata->attributes.operation = DASD_BYPASS_CACHE;
4138 dedata->ga_extended |= 0x42;
4139 dedata->blk_size = blksize;
4140 lredata->operation.orientation = 0x2;
4141 lredata->operation.operation = 0x16;
4142 lredata->auxiliary.check_bytes = 0x01;
4143 pfx_cmd = DASD_ECKD_CCW_PFX_READ;
4146 DBF_DEV_EVENT(DBF_ERR, basedev,
4147 "prepare itcw, unknown opcode 0x%x", cmd);
4154 dedata->attributes.mode = 0x3; /* ECKD */
4156 heads = basepriv->rdc_data.trk_per_cyl;
4157 begcyl = trk / heads;
4158 beghead = trk % heads;
4159 endcyl = totrk / heads;
4160 endhead = totrk % heads;
4162 /* check for sequential prestage - enhance cylinder range */
4163 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE ||
4164 dedata->attributes.operation == DASD_SEQ_ACCESS) {
4166 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl)
4167 endcyl += basepriv->attrib.nr_cyl;
4169 endcyl = (basepriv->real_cyl - 1);
4172 set_ch_t(&dedata->beg_ext, begcyl, beghead);
4173 set_ch_t(&dedata->end_ext, endcyl, endhead);
4175 dedata->ep_format = 0x20; /* records per track is valid */
4176 dedata->ep_rec_per_track = blk_per_trk;
4179 switch (basepriv->rdc_data.dev_type) {
4181 dn = ceil_quot(blksize + 6, 232);
4182 d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34);
4183 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
4186 d = 7 + ceil_quot(blksize + 12, 32);
4187 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
4192 if (cmd == DASD_ECKD_CCW_READ_COUNT_MT) {
4193 lredata->auxiliary.length_valid = 0;
4194 lredata->auxiliary.length_scope = 0;
4195 lredata->sector = 0xff;
4197 lredata->auxiliary.length_valid = 1;
4198 lredata->auxiliary.length_scope = 1;
4199 lredata->sector = sector;
4201 lredata->auxiliary.imbedded_ccw_valid = 1;
4202 lredata->length = tlf;
4203 lredata->imbedded_ccw = cmd;
4204 lredata->count = count;
4205 set_ch_t(&lredata->seek_addr, begcyl, beghead);
4206 lredata->search_arg.cyl = lredata->seek_addr.cyl;
4207 lredata->search_arg.head = lredata->seek_addr.head;
4208 lredata->search_arg.record = rec_on_trk;
4210 dcw = itcw_add_dcw(itcw, pfx_cmd, 0,
4211 &pfxdata, sizeof(pfxdata), total_data_size);
4212 return PTR_ERR_OR_ZERO(dcw);
4215 static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track(
4216 struct dasd_device *startdev,
4217 struct dasd_block *block,
4218 struct request *req,
4223 unsigned int first_offs,
4224 unsigned int last_offs,
4225 unsigned int blk_per_trk,
4226 unsigned int blksize)
4228 struct dasd_ccw_req *cqr;
4229 struct req_iterator iter;
4232 unsigned int trkcount, ctidaw;
4234 struct dasd_device *basedev;
4237 struct tidaw *last_tidaw = NULL;
4241 unsigned int seg_len, part_len, len_to_track_end;
4242 unsigned char new_track;
4243 sector_t recid, trkid;
4245 unsigned int count, count_to_trk_end;
4248 basedev = block->base;
4249 if (rq_data_dir(req) == READ) {
4250 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
4251 itcw_op = ITCW_OP_READ;
4252 } else if (rq_data_dir(req) == WRITE) {
4253 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
4254 itcw_op = ITCW_OP_WRITE;
4256 return ERR_PTR(-EINVAL);
4258 /* trackbased I/O needs address all memory via TIDAWs,
4259 * not just for 64 bit addresses. This allows us to map
4260 * each segment directly to one tidaw.
4261 * In the case of write requests, additional tidaws may
4262 * be needed when a segment crosses a track boundary.
4264 trkcount = last_trk - first_trk + 1;
4266 rq_for_each_segment(bv, req, iter) {
4269 if (rq_data_dir(req) == WRITE)
4270 ctidaw += (last_trk - first_trk);
4272 /* Allocate the ccw request. */
4273 itcw_size = itcw_calc_size(0, ctidaw, 0);
4274 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev,
4275 blk_mq_rq_to_pdu(req));
4279 /* transfer length factor: how many bytes to read from the last track */
4280 if (first_trk == last_trk)
4281 tlf = last_offs - first_offs + 1;
4283 tlf = last_offs + 1;
4286 itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0);
4291 cqr->cpaddr = itcw_get_tcw(itcw);
4292 if (prepare_itcw(itcw, first_trk, last_trk,
4293 cmd, basedev, startdev,
4296 (last_rec - first_rec + 1) * blksize,
4297 tlf, blk_per_trk) == -EAGAIN) {
4298 /* Clock not in sync and XRC is enabled.
4304 len_to_track_end = 0;
4306 * A tidaw can address 4k of memory, but must not cross page boundaries
4307 * We can let the block layer handle this by setting
4308 * blk_queue_segment_boundary to page boundaries and
4309 * blk_max_segment_size to page size when setting up the request queue.
4310 * For write requests, a TIDAW must not cross track boundaries, because
4311 * we have to set the CBC flag on the last tidaw for each track.
4313 if (rq_data_dir(req) == WRITE) {
4316 rq_for_each_segment(bv, req, iter) {
4317 dst = page_address(bv.bv_page) + bv.bv_offset;
4318 seg_len = bv.bv_len;
4322 offs = sector_div(trkid, blk_per_trk);
4323 count_to_trk_end = blk_per_trk - offs;
4324 count = min((last_rec - recid + 1),
4325 (sector_t)count_to_trk_end);
4326 len_to_track_end = count * blksize;
4330 part_len = min(seg_len, len_to_track_end);
4331 seg_len -= part_len;
4332 len_to_track_end -= part_len;
4333 /* We need to end the tidaw at track end */
4334 if (!len_to_track_end) {
4336 tidaw_flags = TIDAW_FLAGS_INSERT_CBC;
4339 last_tidaw = itcw_add_tidaw(itcw, tidaw_flags,
4341 if (IS_ERR(last_tidaw)) {
4349 rq_for_each_segment(bv, req, iter) {
4350 dst = page_address(bv.bv_page) + bv.bv_offset;
4351 last_tidaw = itcw_add_tidaw(itcw, 0x00,
4353 if (IS_ERR(last_tidaw)) {
4359 last_tidaw->flags |= TIDAW_FLAGS_LAST;
4360 last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC;
4361 itcw_finalize(itcw);
4363 if (blk_noretry_request(req) ||
4364 block->base->features & DASD_FEATURE_FAILFAST)
4365 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
4367 cqr->startdev = startdev;
4368 cqr->memdev = startdev;
4370 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
4371 cqr->lpm = dasd_path_get_ppm(startdev);
4372 cqr->retries = startdev->default_retries;
4373 cqr->buildclk = get_tod_clock();
4374 cqr->status = DASD_CQR_FILLED;
4376 /* Set flags to suppress output for expected errors */
4377 if (dasd_eckd_is_ese(basedev)) {
4378 set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags);
4379 set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags);
4380 set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags);
4385 dasd_sfree_request(cqr, startdev);
4386 return ERR_PTR(ret);
4389 static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev,
4390 struct dasd_block *block,
4391 struct request *req)
4396 struct dasd_eckd_private *private;
4397 struct dasd_device *basedev;
4398 sector_t first_rec, last_rec;
4399 sector_t first_trk, last_trk;
4400 unsigned int first_offs, last_offs;
4401 unsigned int blk_per_trk, blksize;
4403 unsigned int data_size;
4404 struct dasd_ccw_req *cqr;
4406 basedev = block->base;
4407 private = basedev->private;
4409 /* Calculate number of blocks/records per track. */
4410 blksize = block->bp_block;
4411 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
4412 if (blk_per_trk == 0)
4413 return ERR_PTR(-EINVAL);
4414 /* Calculate record id of first and last block. */
4415 first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift;
4416 first_offs = sector_div(first_trk, blk_per_trk);
4417 last_rec = last_trk =
4418 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift;
4419 last_offs = sector_div(last_trk, blk_per_trk);
4420 cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk);
4422 fcx_multitrack = private->features.feature[40] & 0x20;
4423 data_size = blk_rq_bytes(req);
4424 if (data_size % blksize)
4425 return ERR_PTR(-EINVAL);
4426 /* tpm write request add CBC data on each track boundary */
4427 if (rq_data_dir(req) == WRITE)
4428 data_size += (last_trk - first_trk) * 4;
4430 /* is read track data and write track data in command mode supported? */
4431 cmdrtd = private->features.feature[9] & 0x20;
4432 cmdwtd = private->features.feature[12] & 0x40;
4433 use_prefix = private->features.feature[8] & 0x01;
4436 if (cdlspecial || dasd_page_cache) {
4437 /* do nothing, just fall through to the cmd mode single case */
4438 } else if ((data_size <= private->fcx_max_data)
4439 && (fcx_multitrack || (first_trk == last_trk))) {
4440 cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req,
4441 first_rec, last_rec,
4442 first_trk, last_trk,
4443 first_offs, last_offs,
4444 blk_per_trk, blksize);
4445 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) &&
4446 (PTR_ERR(cqr) != -ENOMEM))
4448 } else if (use_prefix &&
4449 (((rq_data_dir(req) == READ) && cmdrtd) ||
4450 ((rq_data_dir(req) == WRITE) && cmdwtd))) {
4451 cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req,
4452 first_rec, last_rec,
4453 first_trk, last_trk,
4454 first_offs, last_offs,
4455 blk_per_trk, blksize);
4456 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) &&
4457 (PTR_ERR(cqr) != -ENOMEM))
4461 cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req,
4462 first_rec, last_rec,
4463 first_trk, last_trk,
4464 first_offs, last_offs,
4465 blk_per_trk, blksize);
4469 static struct dasd_ccw_req *dasd_eckd_build_cp_raw(struct dasd_device *startdev,
4470 struct dasd_block *block,
4471 struct request *req)
4473 sector_t start_padding_sectors, end_sector_offset, end_padding_sectors;
4474 unsigned int seg_len, len_to_track_end;
4475 unsigned int cidaw, cplength, datasize;
4476 sector_t first_trk, last_trk, sectors;
4477 struct dasd_eckd_private *base_priv;
4478 struct dasd_device *basedev;
4479 struct req_iterator iter;
4480 struct dasd_ccw_req *cqr;
4481 unsigned int first_offs;
4482 unsigned int trkcount;
4483 unsigned long *idaws;
4493 * raw track access needs to be mutiple of 64k and on 64k boundary
4494 * For read requests we can fix an incorrect alignment by padding
4495 * the request with dummy pages.
4497 start_padding_sectors = blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK;
4498 end_sector_offset = (blk_rq_pos(req) + blk_rq_sectors(req)) %
4499 DASD_RAW_SECTORS_PER_TRACK;
4500 end_padding_sectors = (DASD_RAW_SECTORS_PER_TRACK - end_sector_offset) %
4501 DASD_RAW_SECTORS_PER_TRACK;
4502 basedev = block->base;
4503 if ((start_padding_sectors || end_padding_sectors) &&
4504 (rq_data_dir(req) == WRITE)) {
4505 DBF_DEV_EVENT(DBF_ERR, basedev,
4506 "raw write not track aligned (%llu,%llu) req %p",
4507 start_padding_sectors, end_padding_sectors, req);
4508 return ERR_PTR(-EINVAL);
4511 first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK;
4512 last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) /
4513 DASD_RAW_SECTORS_PER_TRACK;
4514 trkcount = last_trk - first_trk + 1;
4517 if (rq_data_dir(req) == READ)
4518 cmd = DASD_ECKD_CCW_READ_TRACK;
4519 else if (rq_data_dir(req) == WRITE)
4520 cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK;
4522 return ERR_PTR(-EINVAL);
4525 * Raw track based I/O needs IDAWs for each page,
4526 * and not just for 64 bit addresses.
4528 cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK;
4531 * struct PFX_eckd_data and struct LRE_eckd_data can have up to 2 bytes
4532 * of extended parameter. This is needed for write full track.
4534 base_priv = basedev->private;
4535 use_prefix = base_priv->features.feature[8] & 0x01;
4537 cplength = 1 + trkcount;
4538 size = sizeof(struct PFX_eckd_data) + 2;
4540 cplength = 2 + trkcount;
4541 size = sizeof(struct DE_eckd_data) +
4542 sizeof(struct LRE_eckd_data) + 2;
4544 size = ALIGN(size, 8);
4546 datasize = size + cidaw * sizeof(unsigned long);
4548 /* Allocate the ccw request. */
4549 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength,
4550 datasize, startdev, blk_mq_rq_to_pdu(req));
4558 prefix_LRE(ccw++, data, first_trk, last_trk, cmd, basedev,
4559 startdev, 1, first_offs + 1, trkcount, 0, 0);
4561 define_extent(ccw++, data, first_trk, last_trk, cmd, basedev, 0);
4562 ccw[-1].flags |= CCW_FLAG_CC;
4564 data += sizeof(struct DE_eckd_data);
4565 locate_record_ext(ccw++, data, first_trk, first_offs + 1,
4566 trkcount, cmd, basedev, 0, 0);
4569 idaws = (unsigned long *)(cqr->data + size);
4570 len_to_track_end = 0;
4571 if (start_padding_sectors) {
4572 ccw[-1].flags |= CCW_FLAG_CC;
4573 ccw->cmd_code = cmd;
4574 /* maximum 3390 track size */
4576 /* 64k map to one track */
4577 len_to_track_end = 65536 - start_padding_sectors * 512;
4578 ccw->cda = (__u32)(addr_t)idaws;
4579 ccw->flags |= CCW_FLAG_IDA;
4580 ccw->flags |= CCW_FLAG_SLI;
4582 for (sectors = 0; sectors < start_padding_sectors; sectors += 8)
4583 idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE);
4585 rq_for_each_segment(bv, req, iter) {
4586 dst = page_address(bv.bv_page) + bv.bv_offset;
4587 seg_len = bv.bv_len;
4588 if (cmd == DASD_ECKD_CCW_READ_TRACK)
4589 memset(dst, 0, seg_len);
4590 if (!len_to_track_end) {
4591 ccw[-1].flags |= CCW_FLAG_CC;
4592 ccw->cmd_code = cmd;
4593 /* maximum 3390 track size */
4595 /* 64k map to one track */
4596 len_to_track_end = 65536;
4597 ccw->cda = (__u32)(addr_t)idaws;
4598 ccw->flags |= CCW_FLAG_IDA;
4599 ccw->flags |= CCW_FLAG_SLI;
4602 len_to_track_end -= seg_len;
4603 idaws = idal_create_words(idaws, dst, seg_len);
4605 for (sectors = 0; sectors < end_padding_sectors; sectors += 8)
4606 idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE);
4607 if (blk_noretry_request(req) ||
4608 block->base->features & DASD_FEATURE_FAILFAST)
4609 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
4610 cqr->startdev = startdev;
4611 cqr->memdev = startdev;
4613 cqr->expires = startdev->default_expires * HZ;
4614 cqr->lpm = dasd_path_get_ppm(startdev);
4615 cqr->retries = startdev->default_retries;
4616 cqr->buildclk = get_tod_clock();
4617 cqr->status = DASD_CQR_FILLED;
4624 dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req)
4626 struct dasd_eckd_private *private;
4628 struct req_iterator iter;
4631 unsigned int blksize, blk_per_trk, off;
4635 if (!dasd_page_cache)
4637 private = cqr->block->base->private;
4638 blksize = cqr->block->bp_block;
4639 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
4640 recid = blk_rq_pos(req) >> cqr->block->s2b_shift;
4642 /* Skip over define extent & locate record. */
4644 if (private->uses_cdl == 0 || recid > 2*blk_per_trk)
4646 rq_for_each_segment(bv, req, iter) {
4647 dst = page_address(bv.bv_page) + bv.bv_offset;
4648 for (off = 0; off < bv.bv_len; off += blksize) {
4649 /* Skip locate record. */
4650 if (private->uses_cdl && recid <= 2*blk_per_trk)
4653 if (ccw->flags & CCW_FLAG_IDA)
4654 cda = *((char **)((addr_t) ccw->cda));
4656 cda = (char *)((addr_t) ccw->cda);
4658 if (rq_data_dir(req) == READ)
4659 memcpy(dst, cda, bv.bv_len);
4660 kmem_cache_free(dasd_page_cache,
4661 (void *)((addr_t)cda & PAGE_MASK));
4670 status = cqr->status == DASD_CQR_DONE;
4671 dasd_sfree_request(cqr, cqr->memdev);
4676 * Modify ccw/tcw in cqr so it can be started on a base device.
4678 * Note that this is not enough to restart the cqr!
4679 * Either reset cqr->startdev as well (summary unit check handling)
4680 * or restart via separate cqr (as in ERP handling).
4682 void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr)
4685 struct PFX_eckd_data *pfxdata;
4690 if (cqr->cpmode == 1) {
4692 tccb = tcw_get_tccb(tcw);
4693 dcw = (struct dcw *)&tccb->tca[0];
4694 pfxdata = (struct PFX_eckd_data *)&dcw->cd[0];
4695 pfxdata->validity.verify_base = 0;
4696 pfxdata->validity.hyper_pav = 0;
4699 pfxdata = cqr->data;
4700 if (ccw->cmd_code == DASD_ECKD_CCW_PFX) {
4701 pfxdata->validity.verify_base = 0;
4702 pfxdata->validity.hyper_pav = 0;
4707 #define DASD_ECKD_CHANQ_MAX_SIZE 4
4709 static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base,
4710 struct dasd_block *block,
4711 struct request *req)
4713 struct dasd_eckd_private *private;
4714 struct dasd_device *startdev;
4715 unsigned long flags;
4716 struct dasd_ccw_req *cqr;
4718 startdev = dasd_alias_get_start_dev(base);
4721 private = startdev->private;
4722 if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE)
4723 return ERR_PTR(-EBUSY);
4725 spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags);
4727 if ((base->features & DASD_FEATURE_USERAW))
4728 cqr = dasd_eckd_build_cp_raw(startdev, block, req);
4730 cqr = dasd_eckd_build_cp(startdev, block, req);
4733 spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags);
4737 static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr,
4738 struct request *req)
4740 struct dasd_eckd_private *private;
4741 unsigned long flags;
4743 spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags);
4744 private = cqr->memdev->private;
4746 spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags);
4747 return dasd_eckd_free_cp(cqr, req);
4751 dasd_eckd_fill_info(struct dasd_device * device,
4752 struct dasd_information2_t * info)
4754 struct dasd_eckd_private *private = device->private;
4756 info->label_block = 2;
4757 info->FBA_layout = private->uses_cdl ? 0 : 1;
4758 info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL;
4759 info->characteristics_size = sizeof(private->rdc_data);
4760 memcpy(info->characteristics, &private->rdc_data,
4761 sizeof(private->rdc_data));
4762 info->confdata_size = min((unsigned long)private->conf_len,
4763 sizeof(info->configuration_data));
4764 memcpy(info->configuration_data, private->conf_data,
4765 info->confdata_size);
4770 * SECTION: ioctl functions for eckd devices.
4774 * Release device ioctl.
4775 * Buils a channel programm to releases a prior reserved
4776 * (see dasd_eckd_reserve) device.
4779 dasd_eckd_release(struct dasd_device *device)
4781 struct dasd_ccw_req *cqr;
4786 if (!capable(CAP_SYS_ADMIN))
4790 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL);
4792 mutex_lock(&dasd_reserve_mutex);
4794 cqr = &dasd_reserve_req->cqr;
4795 memset(cqr, 0, sizeof(*cqr));
4796 memset(&dasd_reserve_req->ccw, 0,
4797 sizeof(dasd_reserve_req->ccw));
4798 cqr->cpaddr = &dasd_reserve_req->ccw;
4799 cqr->data = &dasd_reserve_req->data;
4800 cqr->magic = DASD_ECKD_MAGIC;
4803 ccw->cmd_code = DASD_ECKD_CCW_RELEASE;
4804 ccw->flags |= CCW_FLAG_SLI;
4806 ccw->cda = (__u32)(addr_t) cqr->data;
4807 cqr->startdev = device;
4808 cqr->memdev = device;
4809 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
4810 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
4811 cqr->retries = 2; /* set retry counter to enable basic ERP */
4812 cqr->expires = 2 * HZ;
4813 cqr->buildclk = get_tod_clock();
4814 cqr->status = DASD_CQR_FILLED;
4816 rc = dasd_sleep_on_immediatly(cqr);
4818 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags);
4821 mutex_unlock(&dasd_reserve_mutex);
4823 dasd_sfree_request(cqr, cqr->memdev);
4828 * Reserve device ioctl.
4829 * Options are set to 'synchronous wait for interrupt' and
4830 * 'timeout the request'. This leads to a terminate IO if
4831 * the interrupt is outstanding for a certain time.
4834 dasd_eckd_reserve(struct dasd_device *device)
4836 struct dasd_ccw_req *cqr;
4841 if (!capable(CAP_SYS_ADMIN))
4845 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL);
4847 mutex_lock(&dasd_reserve_mutex);
4849 cqr = &dasd_reserve_req->cqr;
4850 memset(cqr, 0, sizeof(*cqr));
4851 memset(&dasd_reserve_req->ccw, 0,
4852 sizeof(dasd_reserve_req->ccw));
4853 cqr->cpaddr = &dasd_reserve_req->ccw;
4854 cqr->data = &dasd_reserve_req->data;
4855 cqr->magic = DASD_ECKD_MAGIC;
4858 ccw->cmd_code = DASD_ECKD_CCW_RESERVE;
4859 ccw->flags |= CCW_FLAG_SLI;
4861 ccw->cda = (__u32)(addr_t) cqr->data;
4862 cqr->startdev = device;
4863 cqr->memdev = device;
4864 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
4865 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
4866 cqr->retries = 2; /* set retry counter to enable basic ERP */
4867 cqr->expires = 2 * HZ;
4868 cqr->buildclk = get_tod_clock();
4869 cqr->status = DASD_CQR_FILLED;
4871 rc = dasd_sleep_on_immediatly(cqr);
4873 set_bit(DASD_FLAG_IS_RESERVED, &device->flags);
4876 mutex_unlock(&dasd_reserve_mutex);
4878 dasd_sfree_request(cqr, cqr->memdev);
4883 * Steal lock ioctl - unconditional reserve device.
4884 * Buils a channel programm to break a device's reservation.
4885 * (unconditional reserve)
4888 dasd_eckd_steal_lock(struct dasd_device *device)
4890 struct dasd_ccw_req *cqr;
4895 if (!capable(CAP_SYS_ADMIN))
4899 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL);
4901 mutex_lock(&dasd_reserve_mutex);
4903 cqr = &dasd_reserve_req->cqr;
4904 memset(cqr, 0, sizeof(*cqr));
4905 memset(&dasd_reserve_req->ccw, 0,
4906 sizeof(dasd_reserve_req->ccw));
4907 cqr->cpaddr = &dasd_reserve_req->ccw;
4908 cqr->data = &dasd_reserve_req->data;
4909 cqr->magic = DASD_ECKD_MAGIC;
4912 ccw->cmd_code = DASD_ECKD_CCW_SLCK;
4913 ccw->flags |= CCW_FLAG_SLI;
4915 ccw->cda = (__u32)(addr_t) cqr->data;
4916 cqr->startdev = device;
4917 cqr->memdev = device;
4918 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
4919 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
4920 cqr->retries = 2; /* set retry counter to enable basic ERP */
4921 cqr->expires = 2 * HZ;
4922 cqr->buildclk = get_tod_clock();
4923 cqr->status = DASD_CQR_FILLED;
4925 rc = dasd_sleep_on_immediatly(cqr);
4927 set_bit(DASD_FLAG_IS_RESERVED, &device->flags);
4930 mutex_unlock(&dasd_reserve_mutex);
4932 dasd_sfree_request(cqr, cqr->memdev);
4937 * SNID - Sense Path Group ID
4938 * This ioctl may be used in situations where I/O is stalled due to
4939 * a reserve, so if the normal dasd_smalloc_request fails, we use the
4940 * preallocated dasd_reserve_req.
4942 static int dasd_eckd_snid(struct dasd_device *device,
4945 struct dasd_ccw_req *cqr;
4949 struct dasd_snid_ioctl_data usrparm;
4951 if (!capable(CAP_SYS_ADMIN))
4954 if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
4958 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1,
4959 sizeof(struct dasd_snid_data), device,
4962 mutex_lock(&dasd_reserve_mutex);
4964 cqr = &dasd_reserve_req->cqr;
4965 memset(cqr, 0, sizeof(*cqr));
4966 memset(&dasd_reserve_req->ccw, 0,
4967 sizeof(dasd_reserve_req->ccw));
4968 cqr->cpaddr = &dasd_reserve_req->ccw;
4969 cqr->data = &dasd_reserve_req->data;
4970 cqr->magic = DASD_ECKD_MAGIC;
4973 ccw->cmd_code = DASD_ECKD_CCW_SNID;
4974 ccw->flags |= CCW_FLAG_SLI;
4976 ccw->cda = (__u32)(addr_t) cqr->data;
4977 cqr->startdev = device;
4978 cqr->memdev = device;
4979 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
4980 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
4981 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags);
4983 cqr->expires = 10 * HZ;
4984 cqr->buildclk = get_tod_clock();
4985 cqr->status = DASD_CQR_FILLED;
4986 cqr->lpm = usrparm.path_mask;
4988 rc = dasd_sleep_on_immediatly(cqr);
4989 /* verify that I/O processing didn't modify the path mask */
4990 if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask))
4993 usrparm.data = *((struct dasd_snid_data *)cqr->data);
4994 if (copy_to_user(argp, &usrparm, sizeof(usrparm)))
4999 mutex_unlock(&dasd_reserve_mutex);
5001 dasd_sfree_request(cqr, cqr->memdev);
5006 * Read performance statistics
5009 dasd_eckd_performance(struct dasd_device *device, void __user *argp)
5011 struct dasd_psf_prssd_data *prssdp;
5012 struct dasd_rssd_perf_stats_t *stats;
5013 struct dasd_ccw_req *cqr;
5017 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
5018 (sizeof(struct dasd_psf_prssd_data) +
5019 sizeof(struct dasd_rssd_perf_stats_t)),
5022 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
5023 "Could not allocate initialization request");
5024 return PTR_ERR(cqr);
5026 cqr->startdev = device;
5027 cqr->memdev = device;
5029 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
5030 cqr->expires = 10 * HZ;
5032 /* Prepare for Read Subsystem Data */
5033 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
5034 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
5035 prssdp->order = PSF_ORDER_PRSSD;
5036 prssdp->suborder = 0x01; /* Performance Statistics */
5037 prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */
5040 ccw->cmd_code = DASD_ECKD_CCW_PSF;
5041 ccw->count = sizeof(struct dasd_psf_prssd_data);
5042 ccw->flags |= CCW_FLAG_CC;
5043 ccw->cda = (__u32)(addr_t) prssdp;
5045 /* Read Subsystem Data - Performance Statistics */
5046 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
5047 memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t));
5050 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
5051 ccw->count = sizeof(struct dasd_rssd_perf_stats_t);
5052 ccw->cda = (__u32)(addr_t) stats;
5054 cqr->buildclk = get_tod_clock();
5055 cqr->status = DASD_CQR_FILLED;
5056 rc = dasd_sleep_on(cqr);
5058 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
5059 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
5060 if (copy_to_user(argp, stats,
5061 sizeof(struct dasd_rssd_perf_stats_t)))
5064 dasd_sfree_request(cqr, cqr->memdev);
5069 * Get attributes (cache operations)
5070 * Returnes the cache attributes used in Define Extend (DE).
5073 dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp)
5075 struct dasd_eckd_private *private = device->private;
5076 struct attrib_data_t attrib = private->attrib;
5079 if (!capable(CAP_SYS_ADMIN))
5085 if (copy_to_user(argp, (long *) &attrib,
5086 sizeof(struct attrib_data_t)))
5093 * Set attributes (cache operations)
5094 * Stores the attributes for cache operation to be used in Define Extend (DE).
5097 dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp)
5099 struct dasd_eckd_private *private = device->private;
5100 struct attrib_data_t attrib;
5102 if (!capable(CAP_SYS_ADMIN))
5107 if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t)))
5109 private->attrib = attrib;
5111 dev_info(&device->cdev->dev,
5112 "The DASD cache mode was set to %x (%i cylinder prestage)\n",
5113 private->attrib.operation, private->attrib.nr_cyl);
5118 * Issue syscall I/O to EMC Symmetrix array.
5119 * CCWs are PSF and RSSD
5121 static int dasd_symm_io(struct dasd_device *device, void __user *argp)
5123 struct dasd_symmio_parms usrparm;
5124 char *psf_data, *rssd_result;
5125 struct dasd_ccw_req *cqr;
5130 if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
5134 /* Copy parms from caller */
5136 if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
5138 if (is_compat_task()) {
5139 /* Make sure pointers are sane even on 31 bit. */
5141 if ((usrparm.psf_data >> 32) != 0)
5143 if ((usrparm.rssd_result >> 32) != 0)
5145 usrparm.psf_data &= 0x7fffffffULL;
5146 usrparm.rssd_result &= 0x7fffffffULL;
5148 /* at least 2 bytes are accessed and should be allocated */
5149 if (usrparm.psf_data_len < 2) {
5150 DBF_DEV_EVENT(DBF_WARNING, device,
5151 "Symmetrix ioctl invalid data length %d",
5152 usrparm.psf_data_len);
5156 /* alloc I/O data area */
5157 psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA);
5158 rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA);
5159 if (!psf_data || !rssd_result) {
5164 /* get syscall header from user space */
5166 if (copy_from_user(psf_data,
5167 (void __user *)(unsigned long) usrparm.psf_data,
5168 usrparm.psf_data_len))
5173 /* setup CCWs for PSF + RSSD */
5174 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2, 0, device, NULL);
5176 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
5177 "Could not allocate initialization request");
5182 cqr->startdev = device;
5183 cqr->memdev = device;
5185 cqr->expires = 10 * HZ;
5186 cqr->buildclk = get_tod_clock();
5187 cqr->status = DASD_CQR_FILLED;
5189 /* Build the ccws */
5193 ccw->cmd_code = DASD_ECKD_CCW_PSF;
5194 ccw->count = usrparm.psf_data_len;
5195 ccw->flags |= CCW_FLAG_CC;
5196 ccw->cda = (__u32)(addr_t) psf_data;
5201 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
5202 ccw->count = usrparm.rssd_result_len;
5203 ccw->flags = CCW_FLAG_SLI ;
5204 ccw->cda = (__u32)(addr_t) rssd_result;
5206 rc = dasd_sleep_on(cqr);
5211 if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result,
5212 rssd_result, usrparm.rssd_result_len))
5217 dasd_sfree_request(cqr, cqr->memdev);
5222 DBF_DEV_EVENT(DBF_WARNING, device,
5223 "Symmetrix ioctl (0x%02x 0x%02x): rc=%d",
5224 (int) psf0, (int) psf1, rc);
5229 dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp)
5231 struct dasd_device *device = block->base;
5235 return dasd_eckd_get_attrib(device, argp);
5237 return dasd_eckd_set_attrib(device, argp);
5239 return dasd_eckd_performance(device, argp);
5241 return dasd_eckd_release(device);
5243 return dasd_eckd_reserve(device);
5245 return dasd_eckd_steal_lock(device);
5247 return dasd_eckd_snid(device, argp);
5249 return dasd_symm_io(device, argp);
5256 * Dump the range of CCWs into 'page' buffer
5257 * and return number of printed chars.
5260 dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page)
5266 while (from <= to) {
5267 len += sprintf(page + len, PRINTK_HEADER
5268 " CCW %p: %08X %08X DAT:",
5269 from, ((int *) from)[0], ((int *) from)[1]);
5271 /* get pointer to data (consider IDALs) */
5272 if (from->flags & CCW_FLAG_IDA)
5273 datap = (char *) *((addr_t *) (addr_t) from->cda);
5275 datap = (char *) ((addr_t) from->cda);
5277 /* dump data (max 32 bytes) */
5278 for (count = 0; count < from->count && count < 32; count++) {
5279 if (count % 8 == 0) len += sprintf(page + len, " ");
5280 if (count % 4 == 0) len += sprintf(page + len, " ");
5281 len += sprintf(page + len, "%02x", datap[count]);
5283 len += sprintf(page + len, "\n");
5290 dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb,
5296 sense = (u64 *) dasd_get_sense(irb);
5297 stat = (u64 *) &irb->scsw;
5299 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : "
5300 "%016llx %016llx %016llx %016llx",
5301 reason, *stat, *((u32 *) (stat + 1)),
5302 sense[0], sense[1], sense[2], sense[3]);
5304 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s",
5305 reason, *stat, *((u32 *) (stat + 1)),
5311 * Print sense data and related channel program.
5312 * Parts are printed because printk buffer is only 1024 bytes.
5314 static void dasd_eckd_dump_sense_ccw(struct dasd_device *device,
5315 struct dasd_ccw_req *req, struct irb *irb)
5318 struct ccw1 *first, *last, *fail, *from, *to;
5321 page = (char *) get_zeroed_page(GFP_ATOMIC);
5323 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
5324 "No memory to dump sense data\n");
5327 /* dump the sense data */
5328 len = sprintf(page, PRINTK_HEADER
5329 " I/O status report for device %s:\n",
5330 dev_name(&device->cdev->dev));
5331 len += sprintf(page + len, PRINTK_HEADER
5332 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X "
5334 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw),
5335 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw),
5336 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw),
5337 req ? req->intrc : 0);
5338 len += sprintf(page + len, PRINTK_HEADER
5339 " device %s: Failing CCW: %p\n",
5340 dev_name(&device->cdev->dev),
5341 (void *) (addr_t) irb->scsw.cmd.cpa);
5342 if (irb->esw.esw0.erw.cons) {
5343 for (sl = 0; sl < 4; sl++) {
5344 len += sprintf(page + len, PRINTK_HEADER
5345 " Sense(hex) %2d-%2d:",
5346 (8 * sl), ((8 * sl) + 7));
5348 for (sct = 0; sct < 8; sct++) {
5349 len += sprintf(page + len, " %02x",
5350 irb->ecw[8 * sl + sct]);
5352 len += sprintf(page + len, "\n");
5355 if (irb->ecw[27] & DASD_SENSE_BIT_0) {
5356 /* 24 Byte Sense Data */
5357 sprintf(page + len, PRINTK_HEADER
5358 " 24 Byte: %x MSG %x, "
5359 "%s MSGb to SYSOP\n",
5360 irb->ecw[7] >> 4, irb->ecw[7] & 0x0f,
5361 irb->ecw[1] & 0x10 ? "" : "no");
5363 /* 32 Byte Sense Data */
5364 sprintf(page + len, PRINTK_HEADER
5365 " 32 Byte: Format: %x "
5366 "Exception class %x\n",
5367 irb->ecw[6] & 0x0f, irb->ecw[22] >> 4);
5370 sprintf(page + len, PRINTK_HEADER
5371 " SORRY - NO VALID SENSE AVAILABLE\n");
5373 printk(KERN_ERR "%s", page);
5376 /* req == NULL for unsolicited interrupts */
5377 /* dump the Channel Program (max 140 Bytes per line) */
5378 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */
5379 first = req->cpaddr;
5380 for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++);
5381 to = min(first + 6, last);
5382 len = sprintf(page, PRINTK_HEADER
5383 " Related CP in req: %p\n", req);
5384 dasd_eckd_dump_ccw_range(first, to, page + len);
5385 printk(KERN_ERR "%s", page);
5387 /* print failing CCW area (maximum 4) */
5388 /* scsw->cda is either valid or zero */
5391 fail = (struct ccw1 *)(addr_t)
5392 irb->scsw.cmd.cpa; /* failing CCW */
5393 if (from < fail - 2) {
5394 from = fail - 2; /* there is a gap - print header */
5395 len += sprintf(page, PRINTK_HEADER "......\n");
5397 to = min(fail + 1, last);
5398 len += dasd_eckd_dump_ccw_range(from, to, page + len);
5400 /* print last CCWs (maximum 2) */
5401 from = max(from, ++to);
5402 if (from < last - 1) {
5403 from = last - 1; /* there is a gap - print header */
5404 len += sprintf(page + len, PRINTK_HEADER "......\n");
5406 len += dasd_eckd_dump_ccw_range(from, last, page + len);
5408 printk(KERN_ERR "%s", page);
5410 free_page((unsigned long) page);
5415 * Print sense data from a tcw.
5417 static void dasd_eckd_dump_sense_tcw(struct dasd_device *device,
5418 struct dasd_ccw_req *req, struct irb *irb)
5421 int len, sl, sct, residual;
5425 page = (char *) get_zeroed_page(GFP_ATOMIC);
5427 DBF_DEV_EVENT(DBF_WARNING, device, " %s",
5428 "No memory to dump sense data");
5431 /* dump the sense data */
5432 len = sprintf(page, PRINTK_HEADER
5433 " I/O status report for device %s:\n",
5434 dev_name(&device->cdev->dev));
5435 len += sprintf(page + len, PRINTK_HEADER
5436 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X "
5437 "CS:%02X fcxs:%02X schxs:%02X RC:%d\n",
5438 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw),
5439 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw),
5440 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw),
5442 (irb->scsw.tm.ifob << 7) | irb->scsw.tm.sesq,
5443 req ? req->intrc : 0);
5444 len += sprintf(page + len, PRINTK_HEADER
5445 " device %s: Failing TCW: %p\n",
5446 dev_name(&device->cdev->dev),
5447 (void *) (addr_t) irb->scsw.tm.tcw);
5451 if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01))
5453 (struct tcw *)(unsigned long)irb->scsw.tm.tcw);
5456 len += sprintf(page + len, PRINTK_HEADER
5457 " tsb->length %d\n", tsb->length);
5458 len += sprintf(page + len, PRINTK_HEADER
5459 " tsb->flags %x\n", tsb->flags);
5460 len += sprintf(page + len, PRINTK_HEADER
5461 " tsb->dcw_offset %d\n", tsb->dcw_offset);
5462 len += sprintf(page + len, PRINTK_HEADER
5463 " tsb->count %d\n", tsb->count);
5464 residual = tsb->count - 28;
5465 len += sprintf(page + len, PRINTK_HEADER
5466 " residual %d\n", residual);
5468 switch (tsb->flags & 0x07) {
5469 case 1: /* tsa_iostat */
5470 len += sprintf(page + len, PRINTK_HEADER
5471 " tsb->tsa.iostat.dev_time %d\n",
5472 tsb->tsa.iostat.dev_time);
5473 len += sprintf(page + len, PRINTK_HEADER
5474 " tsb->tsa.iostat.def_time %d\n",
5475 tsb->tsa.iostat.def_time);
5476 len += sprintf(page + len, PRINTK_HEADER
5477 " tsb->tsa.iostat.queue_time %d\n",
5478 tsb->tsa.iostat.queue_time);
5479 len += sprintf(page + len, PRINTK_HEADER
5480 " tsb->tsa.iostat.dev_busy_time %d\n",
5481 tsb->tsa.iostat.dev_busy_time);
5482 len += sprintf(page + len, PRINTK_HEADER
5483 " tsb->tsa.iostat.dev_act_time %d\n",
5484 tsb->tsa.iostat.dev_act_time);
5485 sense = tsb->tsa.iostat.sense;
5487 case 2: /* ts_ddpc */
5488 len += sprintf(page + len, PRINTK_HEADER
5489 " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc);
5490 for (sl = 0; sl < 2; sl++) {
5491 len += sprintf(page + len, PRINTK_HEADER
5492 " tsb->tsa.ddpc.rcq %2d-%2d: ",
5493 (8 * sl), ((8 * sl) + 7));
5494 rcq = tsb->tsa.ddpc.rcq;
5495 for (sct = 0; sct < 8; sct++) {
5496 len += sprintf(page + len, " %02x",
5499 len += sprintf(page + len, "\n");
5501 sense = tsb->tsa.ddpc.sense;
5503 case 3: /* tsa_intrg */
5504 len += sprintf(page + len, PRINTK_HEADER
5505 " tsb->tsa.intrg.: not supported yet\n");
5510 for (sl = 0; sl < 4; sl++) {
5511 len += sprintf(page + len, PRINTK_HEADER
5512 " Sense(hex) %2d-%2d:",
5513 (8 * sl), ((8 * sl) + 7));
5514 for (sct = 0; sct < 8; sct++) {
5515 len += sprintf(page + len, " %02x",
5516 sense[8 * sl + sct]);
5518 len += sprintf(page + len, "\n");
5521 if (sense[27] & DASD_SENSE_BIT_0) {
5522 /* 24 Byte Sense Data */
5523 sprintf(page + len, PRINTK_HEADER
5524 " 24 Byte: %x MSG %x, "
5525 "%s MSGb to SYSOP\n",
5526 sense[7] >> 4, sense[7] & 0x0f,
5527 sense[1] & 0x10 ? "" : "no");
5529 /* 32 Byte Sense Data */
5530 sprintf(page + len, PRINTK_HEADER
5531 " 32 Byte: Format: %x "
5532 "Exception class %x\n",
5533 sense[6] & 0x0f, sense[22] >> 4);
5536 sprintf(page + len, PRINTK_HEADER
5537 " SORRY - NO VALID SENSE AVAILABLE\n");
5540 sprintf(page + len, PRINTK_HEADER
5541 " SORRY - NO TSB DATA AVAILABLE\n");
5543 printk(KERN_ERR "%s", page);
5544 free_page((unsigned long) page);
5547 static void dasd_eckd_dump_sense(struct dasd_device *device,
5548 struct dasd_ccw_req *req, struct irb *irb)
5550 u8 *sense = dasd_get_sense(irb);
5552 if (scsw_is_tm(&irb->scsw)) {
5554 * In some cases the 'File Protected' or 'Incorrect Length'
5555 * error might be expected and log messages shouldn't be written
5556 * then. Check if the according suppress bit is set.
5558 if (sense && (sense[1] & SNS1_FILE_PROTECTED) &&
5559 test_bit(DASD_CQR_SUPPRESS_FP, &req->flags))
5561 if (scsw_cstat(&irb->scsw) == 0x40 &&
5562 test_bit(DASD_CQR_SUPPRESS_IL, &req->flags))
5565 dasd_eckd_dump_sense_tcw(device, req, irb);
5568 * In some cases the 'Command Reject' or 'No Record Found'
5569 * error might be expected and log messages shouldn't be
5570 * written then. Check if the according suppress bit is set.
5572 if (sense && sense[0] & SNS0_CMD_REJECT &&
5573 test_bit(DASD_CQR_SUPPRESS_CR, &req->flags))
5576 if (sense && sense[1] & SNS1_NO_REC_FOUND &&
5577 test_bit(DASD_CQR_SUPPRESS_NRF, &req->flags))
5580 dasd_eckd_dump_sense_ccw(device, req, irb);
5584 static int dasd_eckd_pm_freeze(struct dasd_device *device)
5587 * the device should be disconnected from our LCU structure
5588 * on restore we will reconnect it and reread LCU specific
5589 * information like PAV support that might have changed
5591 dasd_alias_remove_device(device);
5592 dasd_alias_disconnect_device_from_lcu(device);
5597 static int dasd_eckd_restore_device(struct dasd_device *device)
5599 struct dasd_eckd_private *private = device->private;
5600 struct dasd_eckd_characteristics temp_rdc_data;
5602 struct dasd_uid temp_uid;
5603 unsigned long flags;
5604 unsigned long cqr_flags = 0;
5606 /* Read Configuration Data */
5607 rc = dasd_eckd_read_conf(device);
5609 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
5610 "Read configuration data failed, rc=%d", rc);
5614 dasd_eckd_get_uid(device, &temp_uid);
5615 /* Generate device unique id */
5616 rc = dasd_eckd_generate_uid(device);
5617 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
5618 if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0)
5619 dev_err(&device->cdev->dev, "The UID of the DASD has "
5621 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
5625 /* register lcu with alias handling, enable PAV if this is a new lcu */
5626 rc = dasd_alias_make_device_known_to_lcu(device);
5630 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags);
5631 dasd_eckd_validate_server(device, cqr_flags);
5633 /* RE-Read Configuration Data */
5634 rc = dasd_eckd_read_conf(device);
5636 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
5637 "Read configuration data failed, rc=%d", rc);
5641 /* Read Feature Codes */
5642 dasd_eckd_read_features(device);
5644 /* Read Volume Information */
5645 dasd_eckd_read_vol_info(device);
5647 /* Read Extent Pool Information */
5648 dasd_eckd_read_ext_pool_info(device);
5650 /* Read Device Characteristics */
5651 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
5652 &temp_rdc_data, 64);
5654 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
5655 "Read device characteristic failed, rc=%d", rc);
5658 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
5659 memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data));
5660 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
5662 /* add device to alias management */
5663 dasd_alias_add_device(device);
5668 dasd_alias_disconnect_device_from_lcu(device);
5673 static int dasd_eckd_reload_device(struct dasd_device *device)
5675 struct dasd_eckd_private *private = device->private;
5678 struct dasd_uid uid;
5679 unsigned long flags;
5682 * remove device from alias handling to prevent new requests
5683 * from being scheduled on the wrong alias device
5685 dasd_alias_remove_device(device);
5687 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
5688 old_base = private->uid.base_unit_addr;
5689 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
5691 /* Read Configuration Data */
5692 rc = dasd_eckd_read_conf(device);
5696 rc = dasd_eckd_generate_uid(device);
5700 * update unit address configuration and
5701 * add device to alias management
5703 dasd_alias_update_add_device(device);
5705 dasd_eckd_get_uid(device, &uid);
5707 if (old_base != uid.base_unit_addr) {
5708 if (strlen(uid.vduit) > 0)
5709 snprintf(print_uid, sizeof(print_uid),
5710 "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial,
5711 uid.ssid, uid.base_unit_addr, uid.vduit);
5713 snprintf(print_uid, sizeof(print_uid),
5714 "%s.%s.%04x.%02x", uid.vendor, uid.serial,
5715 uid.ssid, uid.base_unit_addr);
5717 dev_info(&device->cdev->dev,
5718 "An Alias device was reassigned to a new base device "
5719 "with UID: %s\n", print_uid);
5727 static int dasd_eckd_read_message_buffer(struct dasd_device *device,
5728 struct dasd_rssd_messages *messages,
5731 struct dasd_rssd_messages *message_buf;
5732 struct dasd_psf_prssd_data *prssdp;
5733 struct dasd_ccw_req *cqr;
5737 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
5738 (sizeof(struct dasd_psf_prssd_data) +
5739 sizeof(struct dasd_rssd_messages)),
5742 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
5743 "Could not allocate read message buffer request");
5744 return PTR_ERR(cqr);
5749 cqr->startdev = device;
5750 cqr->memdev = device;
5752 cqr->expires = 10 * HZ;
5753 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags);
5754 /* dasd_sleep_on_immediatly does not do complex error
5755 * recovery so clear erp flag and set retry counter to
5757 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
5760 /* Prepare for Read Subsystem Data */
5761 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
5762 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
5763 prssdp->order = PSF_ORDER_PRSSD;
5764 prssdp->suborder = 0x03; /* Message Buffer */
5765 /* all other bytes of prssdp must be zero */
5768 ccw->cmd_code = DASD_ECKD_CCW_PSF;
5769 ccw->count = sizeof(struct dasd_psf_prssd_data);
5770 ccw->flags |= CCW_FLAG_CC;
5771 ccw->flags |= CCW_FLAG_SLI;
5772 ccw->cda = (__u32)(addr_t) prssdp;
5774 /* Read Subsystem Data - message buffer */
5775 message_buf = (struct dasd_rssd_messages *) (prssdp + 1);
5776 memset(message_buf, 0, sizeof(struct dasd_rssd_messages));
5779 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
5780 ccw->count = sizeof(struct dasd_rssd_messages);
5781 ccw->flags |= CCW_FLAG_SLI;
5782 ccw->cda = (__u32)(addr_t) message_buf;
5784 cqr->buildclk = get_tod_clock();
5785 cqr->status = DASD_CQR_FILLED;
5786 rc = dasd_sleep_on_immediatly(cqr);
5788 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
5789 message_buf = (struct dasd_rssd_messages *)
5791 memcpy(messages, message_buf,
5792 sizeof(struct dasd_rssd_messages));
5793 } else if (cqr->lpm) {
5795 * on z/VM we might not be able to do I/O on the requested path
5796 * but instead we get the required information on any path
5797 * so retry with open path mask
5802 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
5803 "Reading messages failed with rc=%d\n"
5805 dasd_sfree_request(cqr, cqr->memdev);
5809 static int dasd_eckd_query_host_access(struct dasd_device *device,
5810 struct dasd_psf_query_host_access *data)
5812 struct dasd_eckd_private *private = device->private;
5813 struct dasd_psf_query_host_access *host_access;
5814 struct dasd_psf_prssd_data *prssdp;
5815 struct dasd_ccw_req *cqr;
5819 /* not available for HYPER PAV alias devices */
5820 if (!device->block && private->lcu->pav == HYPER_PAV)
5823 /* may not be supported by the storage server */
5824 if (!(private->features.feature[14] & 0x80))
5827 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
5828 sizeof(struct dasd_psf_prssd_data) + 1,
5831 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
5832 "Could not allocate read message buffer request");
5833 return PTR_ERR(cqr);
5835 host_access = kzalloc(sizeof(*host_access), GFP_KERNEL | GFP_DMA);
5837 dasd_sfree_request(cqr, device);
5838 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
5839 "Could not allocate host_access buffer");
5842 cqr->startdev = device;
5843 cqr->memdev = device;
5846 cqr->expires = 10 * HZ;
5848 /* Prepare for Read Subsystem Data */
5849 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
5850 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
5851 prssdp->order = PSF_ORDER_PRSSD;
5852 prssdp->suborder = PSF_SUBORDER_QHA; /* query host access */
5853 /* LSS and Volume that will be queried */
5854 prssdp->lss = private->ned->ID;
5855 prssdp->volume = private->ned->unit_addr;
5856 /* all other bytes of prssdp must be zero */
5859 ccw->cmd_code = DASD_ECKD_CCW_PSF;
5860 ccw->count = sizeof(struct dasd_psf_prssd_data);
5861 ccw->flags |= CCW_FLAG_CC;
5862 ccw->flags |= CCW_FLAG_SLI;
5863 ccw->cda = (__u32)(addr_t) prssdp;
5865 /* Read Subsystem Data - query host access */
5867 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
5868 ccw->count = sizeof(struct dasd_psf_query_host_access);
5869 ccw->flags |= CCW_FLAG_SLI;
5870 ccw->cda = (__u32)(addr_t) host_access;
5872 cqr->buildclk = get_tod_clock();
5873 cqr->status = DASD_CQR_FILLED;
5874 /* the command might not be supported, suppress error message */
5875 __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags);
5876 rc = dasd_sleep_on_interruptible(cqr);
5878 *data = *host_access;
5880 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
5881 "Reading host access data failed with rc=%d\n",
5886 dasd_sfree_request(cqr, cqr->memdev);
5891 * return number of grouped devices
5893 static int dasd_eckd_host_access_count(struct dasd_device *device)
5895 struct dasd_psf_query_host_access *access;
5896 struct dasd_ckd_path_group_entry *entry;
5897 struct dasd_ckd_host_information *info;
5901 access = kzalloc(sizeof(*access), GFP_NOIO);
5903 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
5904 "Could not allocate access buffer");
5907 rc = dasd_eckd_query_host_access(device, access);
5913 info = (struct dasd_ckd_host_information *)
5914 access->host_access_information;
5915 for (i = 0; i < info->entry_count; i++) {
5916 entry = (struct dasd_ckd_path_group_entry *)
5917 (info->entry + i * info->entry_size);
5918 if (entry->status_flags & DASD_ECKD_PG_GROUPED)
5927 * write host access information to a sequential file
5929 static int dasd_hosts_print(struct dasd_device *device, struct seq_file *m)
5931 struct dasd_psf_query_host_access *access;
5932 struct dasd_ckd_path_group_entry *entry;
5933 struct dasd_ckd_host_information *info;
5934 char sysplex[9] = "";
5937 access = kzalloc(sizeof(*access), GFP_NOIO);
5939 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
5940 "Could not allocate access buffer");
5943 rc = dasd_eckd_query_host_access(device, access);
5949 info = (struct dasd_ckd_host_information *)
5950 access->host_access_information;
5951 for (i = 0; i < info->entry_count; i++) {
5952 entry = (struct dasd_ckd_path_group_entry *)
5953 (info->entry + i * info->entry_size);
5955 seq_printf(m, "pgid %*phN\n", 11, entry->pgid);
5957 seq_printf(m, "status_flags %02x\n", entry->status_flags);
5959 memcpy(&sysplex, &entry->sysplex_name, sizeof(sysplex) - 1);
5960 EBCASC(sysplex, sizeof(sysplex));
5961 seq_printf(m, "sysplex_name %8s\n", sysplex);
5962 /* SUPPORTED CYLINDER */
5963 seq_printf(m, "supported_cylinder %d\n", entry->cylinder);
5965 seq_printf(m, "timestamp %lu\n", (unsigned long)
5974 * Perform Subsystem Function - CUIR response
5977 dasd_eckd_psf_cuir_response(struct dasd_device *device, int response,
5978 __u32 message_id, __u8 lpum)
5980 struct dasd_psf_cuir_response *psf_cuir;
5981 int pos = pathmask_to_pos(lpum);
5982 struct dasd_ccw_req *cqr;
5986 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ ,
5987 sizeof(struct dasd_psf_cuir_response),
5991 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
5992 "Could not allocate PSF-CUIR request");
5993 return PTR_ERR(cqr);
5996 psf_cuir = (struct dasd_psf_cuir_response *)cqr->data;
5997 psf_cuir->order = PSF_ORDER_CUIR_RESPONSE;
5998 psf_cuir->cc = response;
5999 psf_cuir->chpid = device->path[pos].chpid;
6000 psf_cuir->message_id = message_id;
6001 psf_cuir->cssid = device->path[pos].cssid;
6002 psf_cuir->ssid = device->path[pos].ssid;
6004 ccw->cmd_code = DASD_ECKD_CCW_PSF;
6005 ccw->cda = (__u32)(addr_t)psf_cuir;
6006 ccw->flags = CCW_FLAG_SLI;
6007 ccw->count = sizeof(struct dasd_psf_cuir_response);
6009 cqr->startdev = device;
6010 cqr->memdev = device;
6013 cqr->expires = 10*HZ;
6014 cqr->buildclk = get_tod_clock();
6015 cqr->status = DASD_CQR_FILLED;
6016 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags);
6018 rc = dasd_sleep_on(cqr);
6020 dasd_sfree_request(cqr, cqr->memdev);
6025 * return configuration data that is referenced by record selector
6026 * if a record selector is specified or per default return the
6027 * conf_data pointer for the path specified by lpum
6029 static struct dasd_conf_data *dasd_eckd_get_ref_conf(struct dasd_device *device,
6031 struct dasd_cuir_message *cuir)
6033 struct dasd_conf_data *conf_data;
6036 if (cuir->record_selector == 0)
6038 for (path = 0x80, pos = 0; path; path >>= 1, pos++) {
6039 conf_data = device->path[pos].conf_data;
6040 if (conf_data->gneq.record_selector ==
6041 cuir->record_selector)
6045 return device->path[pathmask_to_pos(lpum)].conf_data;
6049 * This function determines the scope of a reconfiguration request by
6050 * analysing the path and device selection data provided in the CUIR request.
6051 * Returns a path mask containing CUIR affected paths for the give device.
6053 * If the CUIR request does not contain the required information return the
6054 * path mask of the path the attention message for the CUIR request was reveived
6057 static int dasd_eckd_cuir_scope(struct dasd_device *device, __u8 lpum,
6058 struct dasd_cuir_message *cuir)
6060 struct dasd_conf_data *ref_conf_data;
6061 unsigned long bitmask = 0, mask = 0;
6062 struct dasd_conf_data *conf_data;
6063 unsigned int pos, path;
6064 char *ref_gneq, *gneq;
6065 char *ref_ned, *ned;
6068 /* if CUIR request does not specify the scope use the path
6069 the attention message was presented on */
6070 if (!cuir->ned_map ||
6071 !(cuir->neq_map[0] | cuir->neq_map[1] | cuir->neq_map[2]))
6074 /* get reference conf data */
6075 ref_conf_data = dasd_eckd_get_ref_conf(device, lpum, cuir);
6076 /* reference ned is determined by ned_map field */
6077 pos = 8 - ffs(cuir->ned_map);
6078 ref_ned = (char *)&ref_conf_data->neds[pos];
6079 ref_gneq = (char *)&ref_conf_data->gneq;
6080 /* transfer 24 bit neq_map to mask */
6081 mask = cuir->neq_map[2];
6082 mask |= cuir->neq_map[1] << 8;
6083 mask |= cuir->neq_map[0] << 16;
6085 for (path = 0; path < 8; path++) {
6086 /* initialise data per path */
6088 conf_data = device->path[path].conf_data;
6089 pos = 8 - ffs(cuir->ned_map);
6090 ned = (char *) &conf_data->neds[pos];
6091 /* compare reference ned and per path ned */
6092 if (memcmp(ref_ned, ned, sizeof(*ned)) != 0)
6094 gneq = (char *)&conf_data->gneq;
6095 /* compare reference gneq and per_path gneq under
6096 24 bit mask where mask bit 0 equals byte 7 of
6097 the gneq and mask bit 24 equals byte 31 */
6099 pos = ffs(bitmask) - 1;
6100 if (memcmp(&ref_gneq[31 - pos], &gneq[31 - pos], 1)
6103 clear_bit(pos, &bitmask);
6107 /* device and path match the reference values
6108 add path to CUIR scope */
6109 tbcpm |= 0x80 >> path;
6114 static void dasd_eckd_cuir_notify_user(struct dasd_device *device,
6115 unsigned long paths, int action)
6120 /* get position of bit in mask */
6121 pos = 8 - ffs(paths);
6122 /* get channel path descriptor from this position */
6123 if (action == CUIR_QUIESCE)
6124 pr_warn("Service on the storage server caused path %x.%02x to go offline",
6125 device->path[pos].cssid,
6126 device->path[pos].chpid);
6127 else if (action == CUIR_RESUME)
6128 pr_info("Path %x.%02x is back online after service on the storage server",
6129 device->path[pos].cssid,
6130 device->path[pos].chpid);
6131 clear_bit(7 - pos, &paths);
6135 static int dasd_eckd_cuir_remove_path(struct dasd_device *device, __u8 lpum,
6136 struct dasd_cuir_message *cuir)
6138 unsigned long tbcpm;
6140 tbcpm = dasd_eckd_cuir_scope(device, lpum, cuir);
6141 /* nothing to do if path is not in use */
6142 if (!(dasd_path_get_opm(device) & tbcpm))
6144 if (!(dasd_path_get_opm(device) & ~tbcpm)) {
6145 /* no path would be left if the CUIR action is taken
6149 /* remove device from operational path mask */
6150 dasd_path_remove_opm(device, tbcpm);
6151 dasd_path_add_cuirpm(device, tbcpm);
6156 * walk through all devices and build a path mask to quiesce them
6157 * return an error if the last path to a device would be removed
6159 * if only part of the devices are quiesced and an error
6160 * occurs no onlining necessary, the storage server will
6161 * notify the already set offline devices again
6163 static int dasd_eckd_cuir_quiesce(struct dasd_device *device, __u8 lpum,
6164 struct dasd_cuir_message *cuir)
6166 struct dasd_eckd_private *private = device->private;
6167 struct alias_pav_group *pavgroup, *tempgroup;
6168 struct dasd_device *dev, *n;
6169 unsigned long paths = 0;
6170 unsigned long flags;
6173 /* active devices */
6174 list_for_each_entry_safe(dev, n, &private->lcu->active_devices,
6176 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
6177 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
6178 spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags);
6183 /* inactive devices */
6184 list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices,
6186 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
6187 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
6188 spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags);
6193 /* devices in PAV groups */
6194 list_for_each_entry_safe(pavgroup, tempgroup,
6195 &private->lcu->grouplist, group) {
6196 list_for_each_entry_safe(dev, n, &pavgroup->baselist,
6198 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
6199 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
6200 spin_unlock_irqrestore(
6201 get_ccwdev_lock(dev->cdev), flags);
6206 list_for_each_entry_safe(dev, n, &pavgroup->aliaslist,
6208 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
6209 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
6210 spin_unlock_irqrestore(
6211 get_ccwdev_lock(dev->cdev), flags);
6217 /* notify user about all paths affected by CUIR action */
6218 dasd_eckd_cuir_notify_user(device, paths, CUIR_QUIESCE);
6224 static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum,
6225 struct dasd_cuir_message *cuir)
6227 struct dasd_eckd_private *private = device->private;
6228 struct alias_pav_group *pavgroup, *tempgroup;
6229 struct dasd_device *dev, *n;
6230 unsigned long paths = 0;
6234 * the path may have been added through a generic path event before
6235 * only trigger path verification if the path is not already in use
6237 list_for_each_entry_safe(dev, n,
6238 &private->lcu->active_devices,
6240 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
6242 if (!(dasd_path_get_opm(dev) & tbcpm)) {
6243 dasd_path_add_tbvpm(dev, tbcpm);
6244 dasd_schedule_device_bh(dev);
6247 list_for_each_entry_safe(dev, n,
6248 &private->lcu->inactive_devices,
6250 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
6252 if (!(dasd_path_get_opm(dev) & tbcpm)) {
6253 dasd_path_add_tbvpm(dev, tbcpm);
6254 dasd_schedule_device_bh(dev);
6257 /* devices in PAV groups */
6258 list_for_each_entry_safe(pavgroup, tempgroup,
6259 &private->lcu->grouplist,
6261 list_for_each_entry_safe(dev, n,
6262 &pavgroup->baselist,
6264 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
6266 if (!(dasd_path_get_opm(dev) & tbcpm)) {
6267 dasd_path_add_tbvpm(dev, tbcpm);
6268 dasd_schedule_device_bh(dev);
6271 list_for_each_entry_safe(dev, n,
6272 &pavgroup->aliaslist,
6274 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
6276 if (!(dasd_path_get_opm(dev) & tbcpm)) {
6277 dasd_path_add_tbvpm(dev, tbcpm);
6278 dasd_schedule_device_bh(dev);
6282 /* notify user about all paths affected by CUIR action */
6283 dasd_eckd_cuir_notify_user(device, paths, CUIR_RESUME);
6287 static void dasd_eckd_handle_cuir(struct dasd_device *device, void *messages,
6290 struct dasd_cuir_message *cuir = messages;
6293 DBF_DEV_EVENT(DBF_WARNING, device,
6294 "CUIR request: %016llx %016llx %016llx %08x",
6295 ((u64 *)cuir)[0], ((u64 *)cuir)[1], ((u64 *)cuir)[2],
6298 if (cuir->code == CUIR_QUIESCE) {
6300 if (dasd_eckd_cuir_quiesce(device, lpum, cuir))
6301 response = PSF_CUIR_LAST_PATH;
6303 response = PSF_CUIR_COMPLETED;
6304 } else if (cuir->code == CUIR_RESUME) {
6306 dasd_eckd_cuir_resume(device, lpum, cuir);
6307 response = PSF_CUIR_COMPLETED;
6309 response = PSF_CUIR_NOT_SUPPORTED;
6311 dasd_eckd_psf_cuir_response(device, response,
6312 cuir->message_id, lpum);
6313 DBF_DEV_EVENT(DBF_WARNING, device,
6314 "CUIR response: %d on message ID %08x", response,
6316 /* to make sure there is no attention left schedule work again */
6317 device->discipline->check_attention(device, lpum);
6320 static void dasd_eckd_oos_resume(struct dasd_device *device)
6322 struct dasd_eckd_private *private = device->private;
6323 struct alias_pav_group *pavgroup, *tempgroup;
6324 struct dasd_device *dev, *n;
6325 unsigned long flags;
6327 spin_lock_irqsave(&private->lcu->lock, flags);
6328 list_for_each_entry_safe(dev, n, &private->lcu->active_devices,
6330 if (dev->stopped & DASD_STOPPED_NOSPC)
6331 dasd_generic_space_avail(dev);
6333 list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices,
6335 if (dev->stopped & DASD_STOPPED_NOSPC)
6336 dasd_generic_space_avail(dev);
6338 /* devices in PAV groups */
6339 list_for_each_entry_safe(pavgroup, tempgroup,
6340 &private->lcu->grouplist,
6342 list_for_each_entry_safe(dev, n, &pavgroup->baselist,
6344 if (dev->stopped & DASD_STOPPED_NOSPC)
6345 dasd_generic_space_avail(dev);
6347 list_for_each_entry_safe(dev, n, &pavgroup->aliaslist,
6349 if (dev->stopped & DASD_STOPPED_NOSPC)
6350 dasd_generic_space_avail(dev);
6353 spin_unlock_irqrestore(&private->lcu->lock, flags);
6356 static void dasd_eckd_handle_oos(struct dasd_device *device, void *messages,
6359 struct dasd_oos_message *oos = messages;
6361 switch (oos->code) {
6364 dev_warn(&device->cdev->dev,
6365 "Extent pool usage has reached a critical value\n");
6366 dasd_eckd_oos_resume(device);
6370 dev_warn(&device->cdev->dev,
6371 "Extent pool is exhausted\n");
6375 dev_info(&device->cdev->dev,
6376 "Extent pool physical space constraint has been relieved\n");
6380 /* In any case, update related data */
6381 dasd_eckd_read_ext_pool_info(device);
6383 /* to make sure there is no attention left schedule work again */
6384 device->discipline->check_attention(device, lpum);
6387 static void dasd_eckd_check_attention_work(struct work_struct *work)
6389 struct check_attention_work_data *data;
6390 struct dasd_rssd_messages *messages;
6391 struct dasd_device *device;
6394 data = container_of(work, struct check_attention_work_data, worker);
6395 device = data->device;
6396 messages = kzalloc(sizeof(*messages), GFP_KERNEL);
6398 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
6399 "Could not allocate attention message buffer");
6402 rc = dasd_eckd_read_message_buffer(device, messages, data->lpum);
6406 if (messages->length == ATTENTION_LENGTH_CUIR &&
6407 messages->format == ATTENTION_FORMAT_CUIR)
6408 dasd_eckd_handle_cuir(device, messages, data->lpum);
6409 if (messages->length == ATTENTION_LENGTH_OOS &&
6410 messages->format == ATTENTION_FORMAT_OOS)
6411 dasd_eckd_handle_oos(device, messages, data->lpum);
6414 dasd_put_device(device);
6419 static int dasd_eckd_check_attention(struct dasd_device *device, __u8 lpum)
6421 struct check_attention_work_data *data;
6423 data = kzalloc(sizeof(*data), GFP_ATOMIC);
6426 INIT_WORK(&data->worker, dasd_eckd_check_attention_work);
6427 dasd_get_device(device);
6428 data->device = device;
6430 schedule_work(&data->worker);
6434 static int dasd_eckd_disable_hpf_path(struct dasd_device *device, __u8 lpum)
6436 if (~lpum & dasd_path_get_opm(device)) {
6437 dasd_path_add_nohpfpm(device, lpum);
6438 dasd_path_remove_opm(device, lpum);
6439 dev_err(&device->cdev->dev,
6440 "Channel path %02X lost HPF functionality and is disabled\n",
6447 static void dasd_eckd_disable_hpf_device(struct dasd_device *device)
6449 struct dasd_eckd_private *private = device->private;
6451 dev_err(&device->cdev->dev,
6452 "High Performance FICON disabled\n");
6453 private->fcx_max_data = 0;
6456 static int dasd_eckd_hpf_enabled(struct dasd_device *device)
6458 struct dasd_eckd_private *private = device->private;
6460 return private->fcx_max_data ? 1 : 0;
6463 static void dasd_eckd_handle_hpf_error(struct dasd_device *device,
6466 struct dasd_eckd_private *private = device->private;
6468 if (!private->fcx_max_data) {
6469 /* sanity check for no HPF, the error makes no sense */
6470 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
6471 "Trying to disable HPF for a non HPF device");
6474 if (irb->scsw.tm.sesq == SCSW_SESQ_DEV_NOFCX) {
6475 dasd_eckd_disable_hpf_device(device);
6476 } else if (irb->scsw.tm.sesq == SCSW_SESQ_PATH_NOFCX) {
6477 if (dasd_eckd_disable_hpf_path(device, irb->esw.esw1.lpum))
6479 dasd_eckd_disable_hpf_device(device);
6480 dasd_path_set_tbvpm(device,
6481 dasd_path_get_hpfpm(device));
6484 * prevent that any new I/O ist started on the device and schedule a
6485 * requeue of existing requests
6487 dasd_device_set_stop_bits(device, DASD_STOPPED_NOT_ACC);
6488 dasd_schedule_requeue(device);
6492 * Initialize block layer request queue.
6494 static void dasd_eckd_setup_blk_queue(struct dasd_block *block)
6496 unsigned int logical_block_size = block->bp_block;
6497 struct request_queue *q = block->request_queue;
6498 struct dasd_device *device = block->base;
6501 if (device->features & DASD_FEATURE_USERAW) {
6503 * the max_blocks value for raw_track access is 256
6504 * it is higher than the native ECKD value because we
6505 * only need one ccw per track
6506 * so the max_hw_sectors are
6507 * 2048 x 512B = 1024kB = 16 tracks
6509 max = DASD_ECKD_MAX_BLOCKS_RAW << block->s2b_shift;
6511 max = DASD_ECKD_MAX_BLOCKS << block->s2b_shift;
6513 blk_queue_flag_set(QUEUE_FLAG_NONROT, q);
6514 q->limits.max_dev_sectors = max;
6515 blk_queue_logical_block_size(q, logical_block_size);
6516 blk_queue_max_hw_sectors(q, max);
6517 blk_queue_max_segments(q, USHRT_MAX);
6518 /* With page sized segments each segment can be translated into one idaw/tidaw */
6519 blk_queue_max_segment_size(q, PAGE_SIZE);
6520 blk_queue_segment_boundary(q, PAGE_SIZE - 1);
6523 static struct ccw_driver dasd_eckd_driver = {
6525 .name = "dasd-eckd",
6526 .owner = THIS_MODULE,
6528 .ids = dasd_eckd_ids,
6529 .probe = dasd_eckd_probe,
6530 .remove = dasd_generic_remove,
6531 .set_offline = dasd_generic_set_offline,
6532 .set_online = dasd_eckd_set_online,
6533 .notify = dasd_generic_notify,
6534 .path_event = dasd_generic_path_event,
6535 .shutdown = dasd_generic_shutdown,
6536 .freeze = dasd_generic_pm_freeze,
6537 .thaw = dasd_generic_restore_device,
6538 .restore = dasd_generic_restore_device,
6539 .uc_handler = dasd_generic_uc_handler,
6540 .int_class = IRQIO_DAS,
6543 static struct dasd_discipline dasd_eckd_discipline = {
6544 .owner = THIS_MODULE,
6547 .check_device = dasd_eckd_check_characteristics,
6548 .uncheck_device = dasd_eckd_uncheck_device,
6549 .do_analysis = dasd_eckd_do_analysis,
6550 .verify_path = dasd_eckd_verify_path,
6551 .basic_to_ready = dasd_eckd_basic_to_ready,
6552 .online_to_ready = dasd_eckd_online_to_ready,
6553 .basic_to_known = dasd_eckd_basic_to_known,
6554 .setup_blk_queue = dasd_eckd_setup_blk_queue,
6555 .fill_geometry = dasd_eckd_fill_geometry,
6556 .start_IO = dasd_start_IO,
6557 .term_IO = dasd_term_IO,
6558 .handle_terminated_request = dasd_eckd_handle_terminated_request,
6559 .format_device = dasd_eckd_format_device,
6560 .check_device_format = dasd_eckd_check_device_format,
6561 .erp_action = dasd_eckd_erp_action,
6562 .erp_postaction = dasd_eckd_erp_postaction,
6563 .check_for_device_change = dasd_eckd_check_for_device_change,
6564 .build_cp = dasd_eckd_build_alias_cp,
6565 .free_cp = dasd_eckd_free_alias_cp,
6566 .dump_sense = dasd_eckd_dump_sense,
6567 .dump_sense_dbf = dasd_eckd_dump_sense_dbf,
6568 .fill_info = dasd_eckd_fill_info,
6569 .ioctl = dasd_eckd_ioctl,
6570 .freeze = dasd_eckd_pm_freeze,
6571 .restore = dasd_eckd_restore_device,
6572 .reload = dasd_eckd_reload_device,
6573 .get_uid = dasd_eckd_get_uid,
6574 .kick_validate = dasd_eckd_kick_validate_server,
6575 .check_attention = dasd_eckd_check_attention,
6576 .host_access_count = dasd_eckd_host_access_count,
6577 .hosts_print = dasd_hosts_print,
6578 .handle_hpf_error = dasd_eckd_handle_hpf_error,
6579 .disable_hpf = dasd_eckd_disable_hpf_device,
6580 .hpf_enabled = dasd_eckd_hpf_enabled,
6581 .reset_path = dasd_eckd_reset_path,
6582 .is_ese = dasd_eckd_is_ese,
6583 .space_allocated = dasd_eckd_space_allocated,
6584 .space_configured = dasd_eckd_space_configured,
6585 .logical_capacity = dasd_eckd_logical_capacity,
6586 .release_space = dasd_eckd_release_space,
6587 .ext_pool_id = dasd_eckd_ext_pool_id,
6588 .ext_size = dasd_eckd_ext_size,
6589 .ext_pool_cap_at_warnlevel = dasd_eckd_ext_pool_cap_at_warnlevel,
6590 .ext_pool_warn_thrshld = dasd_eckd_ext_pool_warn_thrshld,
6591 .ext_pool_oos = dasd_eckd_ext_pool_oos,
6592 .ext_pool_exhaust = dasd_eckd_ext_pool_exhaust,
6593 .ese_format = dasd_eckd_ese_format,
6594 .ese_read = dasd_eckd_ese_read,
6598 dasd_eckd_init(void)
6602 ASCEBC(dasd_eckd_discipline.ebcname, 4);
6603 dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req),
6604 GFP_KERNEL | GFP_DMA);
6605 if (!dasd_reserve_req)
6607 dasd_vol_info_req = kmalloc(sizeof(*dasd_vol_info_req),
6608 GFP_KERNEL | GFP_DMA);
6609 if (!dasd_vol_info_req)
6611 path_verification_worker = kmalloc(sizeof(*path_verification_worker),
6612 GFP_KERNEL | GFP_DMA);
6613 if (!path_verification_worker) {
6614 kfree(dasd_reserve_req);
6615 kfree(dasd_vol_info_req);
6618 rawpadpage = (void *)__get_free_page(GFP_KERNEL);
6620 kfree(path_verification_worker);
6621 kfree(dasd_reserve_req);
6622 kfree(dasd_vol_info_req);
6625 ret = ccw_driver_register(&dasd_eckd_driver);
6627 wait_for_device_probe();
6629 kfree(path_verification_worker);
6630 kfree(dasd_reserve_req);
6631 kfree(dasd_vol_info_req);
6632 free_page((unsigned long)rawpadpage);
6638 dasd_eckd_cleanup(void)
6640 ccw_driver_unregister(&dasd_eckd_driver);
6641 kfree(path_verification_worker);
6642 kfree(dasd_reserve_req);
6643 free_page((unsigned long)rawpadpage);
6646 module_init(dasd_eckd_init);
6647 module_exit(dasd_eckd_cleanup);