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 if (dasd_eckd_is_ese(device))
2059 dasd_set_feature(device->cdev, DASD_FEATURE_DISCARD, 1);
2061 dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) "
2062 "with %d cylinders, %d heads, %d sectors%s\n",
2063 private->rdc_data.dev_type,
2064 private->rdc_data.dev_model,
2065 private->rdc_data.cu_type,
2066 private->rdc_data.cu_model.model,
2068 private->rdc_data.trk_per_cyl,
2069 private->rdc_data.sec_per_trk,
2070 readonly ? ", read-only device" : "");
2074 dasd_alias_disconnect_device_from_lcu(device);
2076 dasd_free_block(device->block);
2077 device->block = NULL;
2079 kfree(private->conf_data);
2080 kfree(device->private);
2081 device->private = NULL;
2085 static void dasd_eckd_uncheck_device(struct dasd_device *device)
2087 struct dasd_eckd_private *private = device->private;
2093 dasd_alias_disconnect_device_from_lcu(device);
2094 private->ned = NULL;
2095 private->sneq = NULL;
2096 private->vdsneq = NULL;
2097 private->gneq = NULL;
2098 private->conf_len = 0;
2099 for (i = 0; i < 8; i++) {
2100 kfree(device->path[i].conf_data);
2101 if ((__u8 *)device->path[i].conf_data ==
2102 private->conf_data) {
2103 private->conf_data = NULL;
2104 private->conf_len = 0;
2106 device->path[i].conf_data = NULL;
2107 device->path[i].cssid = 0;
2108 device->path[i].ssid = 0;
2109 device->path[i].chpid = 0;
2111 kfree(private->conf_data);
2112 private->conf_data = NULL;
2115 static struct dasd_ccw_req *
2116 dasd_eckd_analysis_ccw(struct dasd_device *device)
2118 struct dasd_eckd_private *private = device->private;
2119 struct eckd_count *count_data;
2120 struct LO_eckd_data *LO_data;
2121 struct dasd_ccw_req *cqr;
2123 int cplength, datasize;
2127 datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data);
2128 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device,
2133 /* Define extent for the first 2 tracks. */
2134 define_extent(ccw++, cqr->data, 0, 1,
2135 DASD_ECKD_CCW_READ_COUNT, device, 0);
2136 LO_data = cqr->data + sizeof(struct DE_eckd_data);
2137 /* Locate record for the first 4 records on track 0. */
2138 ccw[-1].flags |= CCW_FLAG_CC;
2139 locate_record(ccw++, LO_data++, 0, 0, 4,
2140 DASD_ECKD_CCW_READ_COUNT, device, 0);
2142 count_data = private->count_area;
2143 for (i = 0; i < 4; i++) {
2144 ccw[-1].flags |= CCW_FLAG_CC;
2145 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
2148 ccw->cda = (__u32)(addr_t) count_data;
2153 /* Locate record for the first record on track 1. */
2154 ccw[-1].flags |= CCW_FLAG_CC;
2155 locate_record(ccw++, LO_data++, 1, 0, 1,
2156 DASD_ECKD_CCW_READ_COUNT, device, 0);
2157 /* Read count ccw. */
2158 ccw[-1].flags |= CCW_FLAG_CC;
2159 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
2162 ccw->cda = (__u32)(addr_t) count_data;
2165 cqr->startdev = device;
2166 cqr->memdev = device;
2168 cqr->buildclk = get_tod_clock();
2169 cqr->status = DASD_CQR_FILLED;
2170 /* Set flags to suppress output for expected errors */
2171 set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags);
2176 /* differentiate between 'no record found' and any other error */
2177 static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr)
2180 if (init_cqr->status == DASD_CQR_DONE)
2182 else if (init_cqr->status == DASD_CQR_NEED_ERP ||
2183 init_cqr->status == DASD_CQR_FAILED) {
2184 sense = dasd_get_sense(&init_cqr->irb);
2185 if (sense && (sense[1] & SNS1_NO_REC_FOUND))
2186 return INIT_CQR_UNFORMATTED;
2188 return INIT_CQR_ERROR;
2190 return INIT_CQR_ERROR;
2194 * This is the callback function for the init_analysis cqr. It saves
2195 * the status of the initial analysis ccw before it frees it and kicks
2196 * the device to continue the startup sequence. This will call
2197 * dasd_eckd_do_analysis again (if the devices has not been marked
2198 * for deletion in the meantime).
2200 static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr,
2203 struct dasd_device *device = init_cqr->startdev;
2204 struct dasd_eckd_private *private = device->private;
2206 private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr);
2207 dasd_sfree_request(init_cqr, device);
2208 dasd_kick_device(device);
2211 static int dasd_eckd_start_analysis(struct dasd_block *block)
2213 struct dasd_ccw_req *init_cqr;
2215 init_cqr = dasd_eckd_analysis_ccw(block->base);
2216 if (IS_ERR(init_cqr))
2217 return PTR_ERR(init_cqr);
2218 init_cqr->callback = dasd_eckd_analysis_callback;
2219 init_cqr->callback_data = NULL;
2220 init_cqr->expires = 5*HZ;
2221 /* first try without ERP, so we can later handle unformatted
2222 * devices as special case
2224 clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags);
2225 init_cqr->retries = 0;
2226 dasd_add_request_head(init_cqr);
2230 static int dasd_eckd_end_analysis(struct dasd_block *block)
2232 struct dasd_device *device = block->base;
2233 struct dasd_eckd_private *private = device->private;
2234 struct eckd_count *count_area;
2235 unsigned int sb, blk_per_trk;
2237 struct dasd_ccw_req *init_cqr;
2239 status = private->init_cqr_status;
2240 private->init_cqr_status = -1;
2241 if (status == INIT_CQR_ERROR) {
2242 /* try again, this time with full ERP */
2243 init_cqr = dasd_eckd_analysis_ccw(device);
2244 dasd_sleep_on(init_cqr);
2245 status = dasd_eckd_analysis_evaluation(init_cqr);
2246 dasd_sfree_request(init_cqr, device);
2249 if (device->features & DASD_FEATURE_USERAW) {
2250 block->bp_block = DASD_RAW_BLOCKSIZE;
2251 blk_per_trk = DASD_RAW_BLOCK_PER_TRACK;
2252 block->s2b_shift = 3;
2256 if (status == INIT_CQR_UNFORMATTED) {
2257 dev_warn(&device->cdev->dev, "The DASD is not formatted\n");
2258 return -EMEDIUMTYPE;
2259 } else if (status == INIT_CQR_ERROR) {
2260 dev_err(&device->cdev->dev,
2261 "Detecting the DASD disk layout failed because "
2262 "of an I/O error\n");
2266 private->uses_cdl = 1;
2267 /* Check Track 0 for Compatible Disk Layout */
2269 for (i = 0; i < 3; i++) {
2270 if (private->count_area[i].kl != 4 ||
2271 private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 ||
2272 private->count_area[i].cyl != 0 ||
2273 private->count_area[i].head != count_area_head[i] ||
2274 private->count_area[i].record != count_area_rec[i]) {
2275 private->uses_cdl = 0;
2280 count_area = &private->count_area[3];
2282 if (private->uses_cdl == 0) {
2283 for (i = 0; i < 5; i++) {
2284 if ((private->count_area[i].kl != 0) ||
2285 (private->count_area[i].dl !=
2286 private->count_area[0].dl) ||
2287 private->count_area[i].cyl != 0 ||
2288 private->count_area[i].head != count_area_head[i] ||
2289 private->count_area[i].record != count_area_rec[i])
2293 count_area = &private->count_area[0];
2295 if (private->count_area[3].record == 1)
2296 dev_warn(&device->cdev->dev,
2297 "Track 0 has no records following the VTOC\n");
2300 if (count_area != NULL && count_area->kl == 0) {
2301 /* we found notthing violating our disk layout */
2302 if (dasd_check_blocksize(count_area->dl) == 0)
2303 block->bp_block = count_area->dl;
2305 if (block->bp_block == 0) {
2306 dev_warn(&device->cdev->dev,
2307 "The disk layout of the DASD is not supported\n");
2308 return -EMEDIUMTYPE;
2310 block->s2b_shift = 0; /* bits to shift 512 to get a block */
2311 for (sb = 512; sb < block->bp_block; sb = sb << 1)
2314 blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block);
2317 block->blocks = ((unsigned long) private->real_cyl *
2318 private->rdc_data.trk_per_cyl *
2321 dev_info(&device->cdev->dev,
2322 "DASD with %u KB/block, %lu KB total size, %u KB/track, "
2323 "%s\n", (block->bp_block >> 10),
2324 (((unsigned long) private->real_cyl *
2325 private->rdc_data.trk_per_cyl *
2326 blk_per_trk * (block->bp_block >> 9)) >> 1),
2327 ((blk_per_trk * block->bp_block) >> 10),
2329 "compatible disk layout" : "linux disk layout");
2334 static int dasd_eckd_do_analysis(struct dasd_block *block)
2336 struct dasd_eckd_private *private = block->base->private;
2338 if (private->init_cqr_status < 0)
2339 return dasd_eckd_start_analysis(block);
2341 return dasd_eckd_end_analysis(block);
2344 static int dasd_eckd_basic_to_ready(struct dasd_device *device)
2346 return dasd_alias_add_device(device);
2349 static int dasd_eckd_online_to_ready(struct dasd_device *device)
2351 if (cancel_work_sync(&device->reload_device))
2352 dasd_put_device(device);
2353 if (cancel_work_sync(&device->kick_validate))
2354 dasd_put_device(device);
2359 static int dasd_eckd_basic_to_known(struct dasd_device *device)
2361 return dasd_alias_remove_device(device);
2365 dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo)
2367 struct dasd_eckd_private *private = block->base->private;
2369 if (dasd_check_blocksize(block->bp_block) == 0) {
2370 geo->sectors = recs_per_track(&private->rdc_data,
2371 0, block->bp_block);
2373 geo->cylinders = private->rdc_data.no_cyl;
2374 geo->heads = private->rdc_data.trk_per_cyl;
2379 * Build the TCW request for the format check
2381 static struct dasd_ccw_req *
2382 dasd_eckd_build_check_tcw(struct dasd_device *base, struct format_data_t *fdata,
2383 int enable_pav, struct eckd_count *fmt_buffer,
2386 struct dasd_eckd_private *start_priv;
2387 struct dasd_device *startdev = NULL;
2388 struct tidaw *last_tidaw = NULL;
2389 struct dasd_ccw_req *cqr;
2397 startdev = dasd_alias_get_start_dev(base);
2402 start_priv = startdev->private;
2404 count = rpt * (fdata->stop_unit - fdata->start_unit + 1);
2407 * we're adding 'count' amount of tidaw to the itcw.
2408 * calculate the corresponding itcw_size
2410 itcw_size = itcw_calc_size(0, count, 0);
2412 cqr = dasd_fmalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev);
2416 start_priv->count++;
2418 itcw = itcw_init(cqr->data, itcw_size, ITCW_OP_READ, 0, count, 0);
2424 cqr->cpaddr = itcw_get_tcw(itcw);
2425 rc = prepare_itcw(itcw, fdata->start_unit, fdata->stop_unit,
2426 DASD_ECKD_CCW_READ_COUNT_MT, base, startdev, 0, count,
2427 sizeof(struct eckd_count),
2428 count * sizeof(struct eckd_count), 0, rpt);
2432 for (i = 0; i < count; i++) {
2433 last_tidaw = itcw_add_tidaw(itcw, 0, fmt_buffer++,
2434 sizeof(struct eckd_count));
2435 if (IS_ERR(last_tidaw)) {
2441 last_tidaw->flags |= TIDAW_FLAGS_LAST;
2442 itcw_finalize(itcw);
2445 cqr->startdev = startdev;
2446 cqr->memdev = startdev;
2447 cqr->basedev = base;
2448 cqr->retries = startdev->default_retries;
2449 cqr->expires = startdev->default_expires * HZ;
2450 cqr->buildclk = get_tod_clock();
2451 cqr->status = DASD_CQR_FILLED;
2452 /* Set flags to suppress output for expected errors */
2453 set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags);
2454 set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags);
2459 dasd_sfree_request(cqr, startdev);
2465 * Build the CCW request for the format check
2467 static struct dasd_ccw_req *
2468 dasd_eckd_build_check(struct dasd_device *base, struct format_data_t *fdata,
2469 int enable_pav, struct eckd_count *fmt_buffer, int rpt)
2471 struct dasd_eckd_private *start_priv;
2472 struct dasd_eckd_private *base_priv;
2473 struct dasd_device *startdev = NULL;
2474 struct dasd_ccw_req *cqr;
2477 int cplength, datasize;
2483 startdev = dasd_alias_get_start_dev(base);
2488 start_priv = startdev->private;
2489 base_priv = base->private;
2491 count = rpt * (fdata->stop_unit - fdata->start_unit + 1);
2493 use_prefix = base_priv->features.feature[8] & 0x01;
2497 datasize = sizeof(struct PFX_eckd_data);
2500 datasize = sizeof(struct DE_eckd_data) +
2501 sizeof(struct LO_eckd_data);
2505 cqr = dasd_fmalloc_request(DASD_ECKD_MAGIC, cplength, datasize, startdev);
2509 start_priv->count++;
2514 prefix_LRE(ccw++, data, fdata->start_unit, fdata->stop_unit,
2515 DASD_ECKD_CCW_READ_COUNT, base, startdev, 1, 0,
2518 define_extent(ccw++, data, fdata->start_unit, fdata->stop_unit,
2519 DASD_ECKD_CCW_READ_COUNT, startdev, 0);
2521 data += sizeof(struct DE_eckd_data);
2522 ccw[-1].flags |= CCW_FLAG_CC;
2524 locate_record(ccw++, data, fdata->start_unit, 0, count,
2525 DASD_ECKD_CCW_READ_COUNT, base, 0);
2528 for (i = 0; i < count; i++) {
2529 ccw[-1].flags |= CCW_FLAG_CC;
2530 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
2531 ccw->flags = CCW_FLAG_SLI;
2533 ccw->cda = (__u32)(addr_t) fmt_buffer;
2538 cqr->startdev = startdev;
2539 cqr->memdev = startdev;
2540 cqr->basedev = base;
2541 cqr->retries = DASD_RETRIES;
2542 cqr->expires = startdev->default_expires * HZ;
2543 cqr->buildclk = get_tod_clock();
2544 cqr->status = DASD_CQR_FILLED;
2545 /* Set flags to suppress output for expected errors */
2546 set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags);
2551 static struct dasd_ccw_req *
2552 dasd_eckd_build_format(struct dasd_device *base, struct dasd_device *startdev,
2553 struct format_data_t *fdata, int enable_pav)
2555 struct dasd_eckd_private *base_priv;
2556 struct dasd_eckd_private *start_priv;
2557 struct dasd_ccw_req *fcp;
2558 struct eckd_count *ect;
2559 struct ch_t address;
2563 int cplength, datasize;
2571 startdev = dasd_alias_get_start_dev(base);
2576 start_priv = startdev->private;
2577 base_priv = base->private;
2579 rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize);
2581 nr_tracks = fdata->stop_unit - fdata->start_unit + 1;
2584 * fdata->intensity is a bit string that tells us what to do:
2585 * Bit 0: write record zero
2586 * Bit 1: write home address, currently not supported
2587 * Bit 2: invalidate tracks
2588 * Bit 3: use OS/390 compatible disk layout (cdl)
2589 * Bit 4: do not allow storage subsystem to modify record zero
2590 * Only some bit combinations do make sense.
2592 if (fdata->intensity & 0x10) {
2594 intensity = fdata->intensity & ~0x10;
2597 intensity = fdata->intensity;
2600 use_prefix = base_priv->features.feature[8] & 0x01;
2602 switch (intensity) {
2603 case 0x00: /* Normal format */
2604 case 0x08: /* Normal format, use cdl. */
2605 cplength = 2 + (rpt*nr_tracks);
2607 datasize = sizeof(struct PFX_eckd_data) +
2608 sizeof(struct LO_eckd_data) +
2609 rpt * nr_tracks * sizeof(struct eckd_count);
2611 datasize = sizeof(struct DE_eckd_data) +
2612 sizeof(struct LO_eckd_data) +
2613 rpt * nr_tracks * sizeof(struct eckd_count);
2615 case 0x01: /* Write record zero and format track. */
2616 case 0x09: /* Write record zero and format track, use cdl. */
2617 cplength = 2 + rpt * nr_tracks;
2619 datasize = sizeof(struct PFX_eckd_data) +
2620 sizeof(struct LO_eckd_data) +
2621 sizeof(struct eckd_count) +
2622 rpt * nr_tracks * sizeof(struct eckd_count);
2624 datasize = sizeof(struct DE_eckd_data) +
2625 sizeof(struct LO_eckd_data) +
2626 sizeof(struct eckd_count) +
2627 rpt * nr_tracks * sizeof(struct eckd_count);
2629 case 0x04: /* Invalidate track. */
2630 case 0x0c: /* Invalidate track, use cdl. */
2633 datasize = sizeof(struct PFX_eckd_data) +
2634 sizeof(struct LO_eckd_data) +
2635 sizeof(struct eckd_count);
2637 datasize = sizeof(struct DE_eckd_data) +
2638 sizeof(struct LO_eckd_data) +
2639 sizeof(struct eckd_count);
2642 dev_warn(&startdev->cdev->dev,
2643 "An I/O control call used incorrect flags 0x%x\n",
2645 return ERR_PTR(-EINVAL);
2648 fcp = dasd_fmalloc_request(DASD_ECKD_MAGIC, cplength, datasize, startdev);
2652 start_priv->count++;
2656 switch (intensity & ~0x08) {
2657 case 0x00: /* Normal format. */
2659 prefix(ccw++, (struct PFX_eckd_data *) data,
2660 fdata->start_unit, fdata->stop_unit,
2661 DASD_ECKD_CCW_WRITE_CKD, base, startdev);
2662 /* grant subsystem permission to format R0 */
2664 ((struct PFX_eckd_data *)data)
2665 ->define_extent.ga_extended |= 0x04;
2666 data += sizeof(struct PFX_eckd_data);
2668 define_extent(ccw++, (struct DE_eckd_data *) data,
2669 fdata->start_unit, fdata->stop_unit,
2670 DASD_ECKD_CCW_WRITE_CKD, startdev, 0);
2671 /* grant subsystem permission to format R0 */
2673 ((struct DE_eckd_data *) data)
2674 ->ga_extended |= 0x04;
2675 data += sizeof(struct DE_eckd_data);
2677 ccw[-1].flags |= CCW_FLAG_CC;
2678 locate_record(ccw++, (struct LO_eckd_data *) data,
2679 fdata->start_unit, 0, rpt*nr_tracks,
2680 DASD_ECKD_CCW_WRITE_CKD, base,
2682 data += sizeof(struct LO_eckd_data);
2684 case 0x01: /* Write record zero + format track. */
2686 prefix(ccw++, (struct PFX_eckd_data *) data,
2687 fdata->start_unit, fdata->stop_unit,
2688 DASD_ECKD_CCW_WRITE_RECORD_ZERO,
2690 data += sizeof(struct PFX_eckd_data);
2692 define_extent(ccw++, (struct DE_eckd_data *) data,
2693 fdata->start_unit, fdata->stop_unit,
2694 DASD_ECKD_CCW_WRITE_RECORD_ZERO, startdev, 0);
2695 data += sizeof(struct DE_eckd_data);
2697 ccw[-1].flags |= CCW_FLAG_CC;
2698 locate_record(ccw++, (struct LO_eckd_data *) data,
2699 fdata->start_unit, 0, rpt * nr_tracks + 1,
2700 DASD_ECKD_CCW_WRITE_RECORD_ZERO, base,
2701 base->block->bp_block);
2702 data += sizeof(struct LO_eckd_data);
2704 case 0x04: /* Invalidate track. */
2706 prefix(ccw++, (struct PFX_eckd_data *) data,
2707 fdata->start_unit, fdata->stop_unit,
2708 DASD_ECKD_CCW_WRITE_CKD, base, startdev);
2709 data += sizeof(struct PFX_eckd_data);
2711 define_extent(ccw++, (struct DE_eckd_data *) data,
2712 fdata->start_unit, fdata->stop_unit,
2713 DASD_ECKD_CCW_WRITE_CKD, startdev, 0);
2714 data += sizeof(struct DE_eckd_data);
2716 ccw[-1].flags |= CCW_FLAG_CC;
2717 locate_record(ccw++, (struct LO_eckd_data *) data,
2718 fdata->start_unit, 0, 1,
2719 DASD_ECKD_CCW_WRITE_CKD, base, 8);
2720 data += sizeof(struct LO_eckd_data);
2724 for (j = 0; j < nr_tracks; j++) {
2725 /* calculate cylinder and head for the current track */
2727 (fdata->start_unit + j) /
2728 base_priv->rdc_data.trk_per_cyl,
2729 (fdata->start_unit + j) %
2730 base_priv->rdc_data.trk_per_cyl);
2731 if (intensity & 0x01) { /* write record zero */
2732 ect = (struct eckd_count *) data;
2733 data += sizeof(struct eckd_count);
2734 ect->cyl = address.cyl;
2735 ect->head = address.head;
2739 ccw[-1].flags |= CCW_FLAG_CC;
2740 ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO;
2741 ccw->flags = CCW_FLAG_SLI;
2743 ccw->cda = (__u32)(addr_t) ect;
2746 if ((intensity & ~0x08) & 0x04) { /* erase track */
2747 ect = (struct eckd_count *) data;
2748 data += sizeof(struct eckd_count);
2749 ect->cyl = address.cyl;
2750 ect->head = address.head;
2754 ccw[-1].flags |= CCW_FLAG_CC;
2755 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD;
2756 ccw->flags = CCW_FLAG_SLI;
2758 ccw->cda = (__u32)(addr_t) ect;
2759 } else { /* write remaining records */
2760 for (i = 0; i < rpt; i++) {
2761 ect = (struct eckd_count *) data;
2762 data += sizeof(struct eckd_count);
2763 ect->cyl = address.cyl;
2764 ect->head = address.head;
2765 ect->record = i + 1;
2767 ect->dl = fdata->blksize;
2769 * Check for special tracks 0-1
2770 * when formatting CDL
2772 if ((intensity & 0x08) &&
2773 address.cyl == 0 && address.head == 0) {
2776 ect->dl = sizes_trk0[i] - 4;
2779 if ((intensity & 0x08) &&
2780 address.cyl == 0 && address.head == 1) {
2782 ect->dl = LABEL_SIZE - 44;
2784 ccw[-1].flags |= CCW_FLAG_CC;
2785 if (i != 0 || j == 0)
2787 DASD_ECKD_CCW_WRITE_CKD;
2790 DASD_ECKD_CCW_WRITE_CKD_MT;
2791 ccw->flags = CCW_FLAG_SLI;
2793 ccw->cda = (__u32)(addr_t) ect;
2799 fcp->startdev = startdev;
2800 fcp->memdev = startdev;
2801 fcp->basedev = base;
2803 fcp->expires = startdev->default_expires * HZ;
2804 fcp->buildclk = get_tod_clock();
2805 fcp->status = DASD_CQR_FILLED;
2811 * Wrapper function to build a CCW request depending on input data
2813 static struct dasd_ccw_req *
2814 dasd_eckd_format_build_ccw_req(struct dasd_device *base,
2815 struct format_data_t *fdata, int enable_pav,
2816 int tpm, struct eckd_count *fmt_buffer, int rpt)
2818 struct dasd_ccw_req *ccw_req;
2821 ccw_req = dasd_eckd_build_format(base, NULL, fdata, enable_pav);
2824 ccw_req = dasd_eckd_build_check_tcw(base, fdata,
2828 ccw_req = dasd_eckd_build_check(base, fdata, enable_pav,
2836 * Sanity checks on format_data
2838 static int dasd_eckd_format_sanity_checks(struct dasd_device *base,
2839 struct format_data_t *fdata)
2841 struct dasd_eckd_private *private = base->private;
2843 if (fdata->start_unit >=
2844 (private->real_cyl * private->rdc_data.trk_per_cyl)) {
2845 dev_warn(&base->cdev->dev,
2846 "Start track number %u used in formatting is too big\n",
2850 if (fdata->stop_unit >=
2851 (private->real_cyl * private->rdc_data.trk_per_cyl)) {
2852 dev_warn(&base->cdev->dev,
2853 "Stop track number %u used in formatting is too big\n",
2857 if (fdata->start_unit > fdata->stop_unit) {
2858 dev_warn(&base->cdev->dev,
2859 "Start track %u used in formatting exceeds end track\n",
2863 if (dasd_check_blocksize(fdata->blksize) != 0) {
2864 dev_warn(&base->cdev->dev,
2865 "The DASD cannot be formatted with block size %u\n",
2873 * This function will process format_data originally coming from an IOCTL
2875 static int dasd_eckd_format_process_data(struct dasd_device *base,
2876 struct format_data_t *fdata,
2877 int enable_pav, int tpm,
2878 struct eckd_count *fmt_buffer, int rpt,
2881 struct dasd_eckd_private *private = base->private;
2882 struct dasd_ccw_req *cqr, *n;
2883 struct list_head format_queue;
2884 struct dasd_device *device;
2886 int old_start, old_stop, format_step;
2890 rc = dasd_eckd_format_sanity_checks(base, fdata);
2894 INIT_LIST_HEAD(&format_queue);
2896 old_start = fdata->start_unit;
2897 old_stop = fdata->stop_unit;
2899 if (!tpm && fmt_buffer != NULL) {
2900 /* Command Mode / Format Check */
2902 } else if (tpm && fmt_buffer != NULL) {
2903 /* Transport Mode / Format Check */
2904 format_step = DASD_CQR_MAX_CCW / rpt;
2906 /* Normal Formatting */
2907 format_step = DASD_CQR_MAX_CCW /
2908 recs_per_track(&private->rdc_data, 0, fdata->blksize);
2913 while (fdata->start_unit <= old_stop) {
2914 step = fdata->stop_unit - fdata->start_unit + 1;
2915 if (step > format_step) {
2917 fdata->start_unit + format_step - 1;
2920 cqr = dasd_eckd_format_build_ccw_req(base, fdata,
2925 if (rc == -ENOMEM) {
2926 if (list_empty(&format_queue))
2929 * not enough memory available, start
2930 * requests retry after first requests
2938 list_add_tail(&cqr->blocklist, &format_queue);
2941 step = fdata->stop_unit - fdata->start_unit + 1;
2942 fmt_buffer += rpt * step;
2944 fdata->start_unit = fdata->stop_unit + 1;
2945 fdata->stop_unit = old_stop;
2948 rc = dasd_sleep_on_queue(&format_queue);
2951 list_for_each_entry_safe(cqr, n, &format_queue, blocklist) {
2952 device = cqr->startdev;
2953 private = device->private;
2955 if (cqr->status == DASD_CQR_FAILED) {
2957 * Only get sense data if called by format
2960 if (fmt_buffer && irb) {
2961 sense = dasd_get_sense(&cqr->irb);
2962 memcpy(irb, &cqr->irb, sizeof(*irb));
2966 list_del_init(&cqr->blocklist);
2967 dasd_ffree_request(cqr, device);
2971 if (rc && rc != -EIO)
2975 * In case fewer than the expected records are on the
2976 * track, we will most likely get a 'No Record Found'
2977 * error (in command mode) or a 'File Protected' error
2978 * (in transport mode). Those particular cases shouldn't
2979 * pass the -EIO to the IOCTL, therefore reset the rc
2983 (sense[1] & SNS1_NO_REC_FOUND ||
2984 sense[1] & SNS1_FILE_PROTECTED))
2993 fdata->start_unit = old_start;
2994 fdata->stop_unit = old_stop;
2999 static int dasd_eckd_format_device(struct dasd_device *base,
3000 struct format_data_t *fdata, int enable_pav)
3002 return dasd_eckd_format_process_data(base, fdata, enable_pav, 0, NULL,
3007 * Callback function to free ESE format requests.
3009 static void dasd_eckd_ese_format_cb(struct dasd_ccw_req *cqr, void *data)
3011 struct dasd_device *device = cqr->startdev;
3012 struct dasd_eckd_private *private = device->private;
3015 dasd_ffree_request(cqr, device);
3018 static struct dasd_ccw_req *
3019 dasd_eckd_ese_format(struct dasd_device *startdev, struct dasd_ccw_req *cqr)
3021 struct dasd_eckd_private *private;
3022 struct format_data_t fdata;
3023 unsigned int recs_per_trk;
3024 struct dasd_ccw_req *fcqr;
3025 struct dasd_device *base;
3026 struct dasd_block *block;
3027 unsigned int blksize;
3028 struct request *req;
3033 req = cqr->callback_data;
3034 base = cqr->block->base;
3035 private = base->private;
3036 block = base->block;
3037 blksize = block->bp_block;
3038 recs_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
3040 first_trk = blk_rq_pos(req) >> block->s2b_shift;
3041 sector_div(first_trk, recs_per_trk);
3043 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift;
3044 sector_div(last_trk, recs_per_trk);
3046 fdata.start_unit = first_trk;
3047 fdata.stop_unit = last_trk;
3048 fdata.blksize = blksize;
3049 fdata.intensity = private->uses_cdl ? DASD_FMT_INT_COMPAT : 0;
3051 rc = dasd_eckd_format_sanity_checks(base, &fdata);
3053 return ERR_PTR(-EINVAL);
3056 * We're building the request with PAV disabled as we're reusing
3057 * the former startdev.
3059 fcqr = dasd_eckd_build_format(base, startdev, &fdata, 0);
3063 fcqr->callback = dasd_eckd_ese_format_cb;
3069 * When data is read from an unformatted area of an ESE volume, this function
3070 * returns zeroed data and thereby mimics a read of zero data.
3072 static void dasd_eckd_ese_read(struct dasd_ccw_req *cqr)
3074 unsigned int blksize, off;
3075 struct dasd_device *base;
3076 struct req_iterator iter;
3077 struct request *req;
3081 req = (struct request *) cqr->callback_data;
3082 base = cqr->block->base;
3083 blksize = base->block->bp_block;
3085 rq_for_each_segment(bv, req, iter) {
3086 dst = page_address(bv.bv_page) + bv.bv_offset;
3087 for (off = 0; off < bv.bv_len; off += blksize) {
3088 if (dst && rq_data_dir(req) == READ) {
3090 memset(dst, 0, blksize);
3097 * Helper function to count consecutive records of a single track.
3099 static int dasd_eckd_count_records(struct eckd_count *fmt_buffer, int start,
3105 head = fmt_buffer[start].head;
3108 * There are 3 conditions where we stop counting:
3109 * - if data reoccurs (same head and record may reoccur), which may
3110 * happen due to the way DASD_ECKD_CCW_READ_COUNT works
3111 * - when the head changes, because we're iterating over several tracks
3112 * then (DASD_ECKD_CCW_READ_COUNT_MT)
3113 * - when we've reached the end of sensible data in the buffer (the
3114 * record will be 0 then)
3116 for (i = start; i < max; i++) {
3118 if ((fmt_buffer[i].head == head &&
3119 fmt_buffer[i].record == 1) ||
3120 fmt_buffer[i].head != head ||
3121 fmt_buffer[i].record == 0)
3130 * Evaluate a given range of tracks. Data like number of records, blocksize,
3131 * record ids, and key length are compared with expected data.
3133 * If a mismatch occurs, the corresponding error bit is set, as well as
3134 * additional information, depending on the error.
3136 static void dasd_eckd_format_evaluate_tracks(struct eckd_count *fmt_buffer,
3137 struct format_check_t *cdata,
3138 int rpt_max, int rpt_exp,
3139 int trk_per_cyl, int tpm)
3150 trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1;
3151 max_entries = trkcount * rpt_max;
3153 for (i = cdata->expect.start_unit; i <= cdata->expect.stop_unit; i++) {
3154 /* Calculate the correct next starting position in the buffer */
3156 while (fmt_buffer[pos].record == 0 &&
3157 fmt_buffer[pos].dl == 0) {
3158 if (pos++ > max_entries)
3162 if (i != cdata->expect.start_unit)
3163 pos += rpt_max - count;
3166 /* Calculate the expected geo values for the current track */
3167 set_ch_t(&geo, i / trk_per_cyl, i % trk_per_cyl);
3169 /* Count and check number of records */
3170 count = dasd_eckd_count_records(fmt_buffer, pos, pos + rpt_max);
3172 if (count < rpt_exp) {
3173 cdata->result = DASD_FMT_ERR_TOO_FEW_RECORDS;
3176 if (count > rpt_exp) {
3177 cdata->result = DASD_FMT_ERR_TOO_MANY_RECORDS;
3181 for (j = 0; j < count; j++, pos++) {
3182 blksize = cdata->expect.blksize;
3186 * Set special values when checking CDL formatted
3189 if ((cdata->expect.intensity & 0x08) &&
3190 geo.cyl == 0 && geo.head == 0) {
3192 blksize = sizes_trk0[j] - 4;
3196 if ((cdata->expect.intensity & 0x08) &&
3197 geo.cyl == 0 && geo.head == 1) {
3198 blksize = LABEL_SIZE - 44;
3202 /* Check blocksize */
3203 if (fmt_buffer[pos].dl != blksize) {
3204 cdata->result = DASD_FMT_ERR_BLKSIZE;
3207 /* Check if key length is 0 */
3208 if (fmt_buffer[pos].kl != kl) {
3209 cdata->result = DASD_FMT_ERR_KEY_LENGTH;
3212 /* Check if record_id is correct */
3213 if (fmt_buffer[pos].cyl != geo.cyl ||
3214 fmt_buffer[pos].head != geo.head ||
3215 fmt_buffer[pos].record != (j + 1)) {
3216 cdata->result = DASD_FMT_ERR_RECORD_ID;
3224 * In case of no errors, we need to decrease by one
3225 * to get the correct positions.
3227 if (!cdata->result) {
3233 cdata->num_records = count;
3234 cdata->rec = fmt_buffer[pos].record;
3235 cdata->blksize = fmt_buffer[pos].dl;
3236 cdata->key_length = fmt_buffer[pos].kl;
3240 * Check the format of a range of tracks of a DASD.
3242 static int dasd_eckd_check_device_format(struct dasd_device *base,
3243 struct format_check_t *cdata,
3246 struct dasd_eckd_private *private = base->private;
3247 struct eckd_count *fmt_buffer;
3249 int rpt_max, rpt_exp;
3250 int fmt_buffer_size;
3256 trk_per_cyl = private->rdc_data.trk_per_cyl;
3258 /* Get maximum and expected amount of records per track */
3259 rpt_max = recs_per_track(&private->rdc_data, 0, 512) + 1;
3260 rpt_exp = recs_per_track(&private->rdc_data, 0, cdata->expect.blksize);
3262 trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1;
3263 fmt_buffer_size = trkcount * rpt_max * sizeof(struct eckd_count);
3265 fmt_buffer = kzalloc(fmt_buffer_size, GFP_KERNEL | GFP_DMA);
3270 * A certain FICON feature subset is needed to operate in transport
3271 * mode. Additionally, the support for transport mode is implicitly
3272 * checked by comparing the buffer size with fcx_max_data. As long as
3273 * the buffer size is smaller we can operate in transport mode and
3274 * process multiple tracks. If not, only one track at once is being
3275 * processed using command mode.
3277 if ((private->features.feature[40] & 0x04) &&
3278 fmt_buffer_size <= private->fcx_max_data)
3281 rc = dasd_eckd_format_process_data(base, &cdata->expect, enable_pav,
3282 tpm, fmt_buffer, rpt_max, &irb);
3283 if (rc && rc != -EIO)
3287 * If our first attempt with transport mode enabled comes back
3288 * with an incorrect length error, we're going to retry the
3289 * check with command mode.
3291 if (tpm && scsw_cstat(&irb.scsw) == 0x40) {
3293 rc = dasd_eckd_format_process_data(base, &cdata->expect,
3295 fmt_buffer, rpt_max,
3304 dasd_eckd_format_evaluate_tracks(fmt_buffer, cdata, rpt_max, rpt_exp,
3313 static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr)
3315 if (cqr->retries < 0) {
3316 cqr->status = DASD_CQR_FAILED;
3319 cqr->status = DASD_CQR_FILLED;
3320 if (cqr->block && (cqr->startdev != cqr->block->base)) {
3321 dasd_eckd_reset_ccw_to_base_io(cqr);
3322 cqr->startdev = cqr->block->base;
3323 cqr->lpm = dasd_path_get_opm(cqr->block->base);
3327 static dasd_erp_fn_t
3328 dasd_eckd_erp_action(struct dasd_ccw_req * cqr)
3330 struct dasd_device *device = (struct dasd_device *) cqr->startdev;
3331 struct ccw_device *cdev = device->cdev;
3333 switch (cdev->id.cu_type) {
3338 return dasd_3990_erp_action;
3342 return dasd_default_erp_action;
3346 static dasd_erp_fn_t
3347 dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr)
3349 return dasd_default_erp_postaction;
3352 static void dasd_eckd_check_for_device_change(struct dasd_device *device,
3353 struct dasd_ccw_req *cqr,
3358 struct dasd_eckd_private *private = device->private;
3360 /* first of all check for state change pending interrupt */
3361 mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP;
3362 if ((scsw_dstat(&irb->scsw) & mask) == mask) {
3364 * for alias only, not in offline processing
3365 * and only if not suspended
3367 if (!device->block && private->lcu &&
3368 device->state == DASD_STATE_ONLINE &&
3369 !test_bit(DASD_FLAG_OFFLINE, &device->flags) &&
3370 !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) {
3371 /* schedule worker to reload device */
3372 dasd_reload_device(device);
3374 dasd_generic_handle_state_change(device);
3378 sense = dasd_get_sense(irb);
3382 /* summary unit check */
3383 if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) &&
3384 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) {
3385 if (test_and_set_bit(DASD_FLAG_SUC, &device->flags)) {
3386 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
3387 "eckd suc: device already notified");
3390 sense = dasd_get_sense(irb);
3392 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
3393 "eckd suc: no reason code available");
3394 clear_bit(DASD_FLAG_SUC, &device->flags);
3398 private->suc_reason = sense[8];
3399 DBF_DEV_EVENT(DBF_NOTICE, device, "%s %x",
3400 "eckd handle summary unit check: reason",
3401 private->suc_reason);
3402 dasd_get_device(device);
3403 if (!schedule_work(&device->suc_work))
3404 dasd_put_device(device);
3409 /* service information message SIM */
3410 if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) &&
3411 ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) {
3412 dasd_3990_erp_handle_sim(device, sense);
3416 /* loss of device reservation is handled via base devices only
3417 * as alias devices may be used with several bases
3419 if (device->block && (sense[27] & DASD_SENSE_BIT_0) &&
3420 (sense[7] == 0x3F) &&
3421 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) &&
3422 test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) {
3423 if (device->features & DASD_FEATURE_FAILONSLCK)
3424 set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags);
3425 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags);
3426 dev_err(&device->cdev->dev,
3427 "The device reservation was lost\n");
3431 static int dasd_eckd_ras_sanity_checks(struct dasd_device *device,
3432 unsigned int first_trk,
3433 unsigned int last_trk)
3435 struct dasd_eckd_private *private = device->private;
3436 unsigned int trks_per_vol;
3439 trks_per_vol = private->real_cyl * private->rdc_data.trk_per_cyl;
3441 if (first_trk >= trks_per_vol) {
3442 dev_warn(&device->cdev->dev,
3443 "Start track number %u used in the space release command is too big\n",
3446 } else if (last_trk >= trks_per_vol) {
3447 dev_warn(&device->cdev->dev,
3448 "Stop track number %u used in the space release command is too big\n",
3451 } else if (first_trk > last_trk) {
3452 dev_warn(&device->cdev->dev,
3453 "Start track %u used in the space release command exceeds the end track\n",
3461 * Helper function to count the amount of involved extents within a given range
3462 * with extent alignment in mind.
3464 static int count_exts(unsigned int from, unsigned int to, int trks_per_ext)
3473 /* Count first partial extent */
3474 if (from % trks_per_ext != 0) {
3475 tmp = from + trks_per_ext - (from % trks_per_ext) - 1;
3478 cur_pos = tmp - from + 1;
3481 /* Count full extents */
3482 if (to - (from + cur_pos) + 1 >= trks_per_ext) {
3483 tmp = to - ((to - trks_per_ext + 1) % trks_per_ext);
3484 count += (tmp - (from + cur_pos) + 1) / trks_per_ext;
3487 /* Count last partial extent */
3495 * Release allocated space for a given range or an entire volume.
3497 static struct dasd_ccw_req *
3498 dasd_eckd_dso_ras(struct dasd_device *device, struct dasd_block *block,
3499 struct request *req, unsigned int first_trk,
3500 unsigned int last_trk, int by_extent)
3502 struct dasd_eckd_private *private = device->private;
3503 struct dasd_dso_ras_ext_range *ras_range;
3504 struct dasd_rssd_features *features;
3505 struct dasd_dso_ras_data *ras_data;
3506 u16 heads, beg_head, end_head;
3507 int cur_to_trk, cur_from_trk;
3508 struct dasd_ccw_req *cqr;
3509 u32 beg_cyl, end_cyl;
3518 if (dasd_eckd_ras_sanity_checks(device, first_trk, last_trk))
3519 return ERR_PTR(-EINVAL);
3521 rq = req ? blk_mq_rq_to_pdu(req) : NULL;
3523 features = &private->features;
3525 trks_per_ext = dasd_eckd_ext_size(device) * private->rdc_data.trk_per_cyl;
3528 nr_exts = count_exts(first_trk, last_trk, trks_per_ext);
3529 ras_size = sizeof(*ras_data);
3530 size = ras_size + (nr_exts * sizeof(*ras_range));
3532 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, size, device, rq);
3534 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
3535 "Could not allocate RAS request");
3539 ras_data = cqr->data;
3540 memset(ras_data, 0, size);
3542 ras_data->order = DSO_ORDER_RAS;
3543 ras_data->flags.vol_type = 0; /* CKD volume */
3544 /* Release specified extents or entire volume */
3545 ras_data->op_flags.by_extent = by_extent;
3547 * This bit guarantees initialisation of tracks within an extent that is
3548 * not fully specified, but is only supported with a certain feature
3551 ras_data->op_flags.guarantee_init = !!(features->feature[56] & 0x01);
3552 ras_data->lss = private->ned->ID;
3553 ras_data->dev_addr = private->ned->unit_addr;
3554 ras_data->nr_exts = nr_exts;
3557 heads = private->rdc_data.trk_per_cyl;
3558 cur_from_trk = first_trk;
3559 cur_to_trk = first_trk + trks_per_ext -
3560 (first_trk % trks_per_ext) - 1;
3561 if (cur_to_trk > last_trk)
3562 cur_to_trk = last_trk;
3563 ras_range = (struct dasd_dso_ras_ext_range *)(cqr->data + ras_size);
3565 for (i = 0; i < nr_exts; i++) {
3566 beg_cyl = cur_from_trk / heads;
3567 beg_head = cur_from_trk % heads;
3568 end_cyl = cur_to_trk / heads;
3569 end_head = cur_to_trk % heads;
3571 set_ch_t(&ras_range->beg_ext, beg_cyl, beg_head);
3572 set_ch_t(&ras_range->end_ext, end_cyl, end_head);
3574 cur_from_trk = cur_to_trk + 1;
3575 cur_to_trk = cur_from_trk + trks_per_ext - 1;
3576 if (cur_to_trk > last_trk)
3577 cur_to_trk = last_trk;
3583 ccw->cda = (__u32)(addr_t)cqr->data;
3584 ccw->cmd_code = DASD_ECKD_CCW_DSO;
3587 cqr->startdev = device;
3588 cqr->memdev = device;
3591 cqr->expires = device->default_expires * HZ;
3592 cqr->buildclk = get_tod_clock();
3593 cqr->status = DASD_CQR_FILLED;
3598 static int dasd_eckd_release_space_full(struct dasd_device *device)
3600 struct dasd_ccw_req *cqr;
3603 cqr = dasd_eckd_dso_ras(device, NULL, NULL, 0, 0, 0);
3605 return PTR_ERR(cqr);
3607 rc = dasd_sleep_on_interruptible(cqr);
3609 dasd_sfree_request(cqr, cqr->memdev);
3614 static int dasd_eckd_release_space_trks(struct dasd_device *device,
3615 unsigned int from, unsigned int to)
3617 struct dasd_eckd_private *private = device->private;
3618 struct dasd_block *block = device->block;
3619 struct dasd_ccw_req *cqr, *n;
3620 struct list_head ras_queue;
3621 unsigned int device_exts;
3628 INIT_LIST_HEAD(&ras_queue);
3630 device_exts = private->real_cyl / dasd_eckd_ext_size(device);
3631 trks_per_ext = dasd_eckd_ext_size(device) * private->rdc_data.trk_per_cyl;
3633 /* Make sure device limits are not exceeded */
3634 step = trks_per_ext * min(device_exts, DASD_ECKD_RAS_EXTS_MAX);
3639 while (cur_pos < to) {
3640 stop = cur_pos + step -
3641 ((cur_pos + step) % trks_per_ext) - 1;
3645 cqr = dasd_eckd_dso_ras(device, NULL, NULL, cur_pos, stop, 1);
3648 if (rc == -ENOMEM) {
3649 if (list_empty(&ras_queue))
3657 spin_lock_irq(&block->queue_lock);
3658 list_add_tail(&cqr->blocklist, &ras_queue);
3659 spin_unlock_irq(&block->queue_lock);
3663 rc = dasd_sleep_on_queue_interruptible(&ras_queue);
3666 list_for_each_entry_safe(cqr, n, &ras_queue, blocklist) {
3667 device = cqr->startdev;
3668 private = device->private;
3670 spin_lock_irq(&block->queue_lock);
3671 list_del_init(&cqr->blocklist);
3672 spin_unlock_irq(&block->queue_lock);
3673 dasd_sfree_request(cqr, device);
3682 static int dasd_eckd_release_space(struct dasd_device *device,
3683 struct format_data_t *rdata)
3685 if (rdata->intensity & DASD_FMT_INT_ESE_FULL)
3686 return dasd_eckd_release_space_full(device);
3687 else if (rdata->intensity == 0)
3688 return dasd_eckd_release_space_trks(device, rdata->start_unit,
3694 static struct dasd_ccw_req *
3695 dasd_eckd_build_cp_discard(struct dasd_device *device, struct dasd_block *block,
3696 struct request *req, sector_t first_trk,
3699 return dasd_eckd_dso_ras(device, block, req, first_trk, last_trk, 1);
3702 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single(
3703 struct dasd_device *startdev,
3704 struct dasd_block *block,
3705 struct request *req,
3710 unsigned int first_offs,
3711 unsigned int last_offs,
3712 unsigned int blk_per_trk,
3713 unsigned int blksize)
3715 struct dasd_eckd_private *private;
3716 unsigned long *idaws;
3717 struct LO_eckd_data *LO_data;
3718 struct dasd_ccw_req *cqr;
3720 struct req_iterator iter;
3724 int count, cidaw, cplength, datasize;
3726 unsigned char cmd, rcmd;
3728 struct dasd_device *basedev;
3730 basedev = block->base;
3731 private = basedev->private;
3732 if (rq_data_dir(req) == READ)
3733 cmd = DASD_ECKD_CCW_READ_MT;
3734 else if (rq_data_dir(req) == WRITE)
3735 cmd = DASD_ECKD_CCW_WRITE_MT;
3737 return ERR_PTR(-EINVAL);
3739 /* Check struct bio and count the number of blocks for the request. */
3742 rq_for_each_segment(bv, req, iter) {
3743 if (bv.bv_len & (blksize - 1))
3744 /* Eckd can only do full blocks. */
3745 return ERR_PTR(-EINVAL);
3746 count += bv.bv_len >> (block->s2b_shift + 9);
3747 if (idal_is_needed (page_address(bv.bv_page), bv.bv_len))
3748 cidaw += bv.bv_len >> (block->s2b_shift + 9);
3751 if (count != last_rec - first_rec + 1)
3752 return ERR_PTR(-EINVAL);
3754 /* use the prefix command if available */
3755 use_prefix = private->features.feature[8] & 0x01;
3757 /* 1x prefix + number of blocks */
3758 cplength = 2 + count;
3759 /* 1x prefix + cidaws*sizeof(long) */
3760 datasize = sizeof(struct PFX_eckd_data) +
3761 sizeof(struct LO_eckd_data) +
3762 cidaw * sizeof(unsigned long);
3764 /* 1x define extent + 1x locate record + number of blocks */
3765 cplength = 2 + count;
3766 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */
3767 datasize = sizeof(struct DE_eckd_data) +
3768 sizeof(struct LO_eckd_data) +
3769 cidaw * sizeof(unsigned long);
3771 /* Find out the number of additional locate record ccws for cdl. */
3772 if (private->uses_cdl && first_rec < 2*blk_per_trk) {
3773 if (last_rec >= 2*blk_per_trk)
3774 count = 2*blk_per_trk - first_rec;
3776 datasize += count*sizeof(struct LO_eckd_data);
3778 /* Allocate the ccw request. */
3779 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
3780 startdev, blk_mq_rq_to_pdu(req));
3784 /* First ccw is define extent or prefix. */
3786 if (prefix(ccw++, cqr->data, first_trk,
3787 last_trk, cmd, basedev, startdev) == -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 PFX_eckd_data));
3797 if (define_extent(ccw++, cqr->data, first_trk,
3798 last_trk, cmd, basedev, 0) == -EAGAIN) {
3799 /* Clock not in sync and XRC is enabled.
3802 dasd_sfree_request(cqr, startdev);
3803 return ERR_PTR(-EAGAIN);
3805 idaws = (unsigned long *) (cqr->data +
3806 sizeof(struct DE_eckd_data));
3808 /* Build locate_record+read/write/ccws. */
3809 LO_data = (struct LO_eckd_data *) (idaws + cidaw);
3811 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) {
3812 /* Only standard blocks so there is just one locate record. */
3813 ccw[-1].flags |= CCW_FLAG_CC;
3814 locate_record(ccw++, LO_data++, first_trk, first_offs + 1,
3815 last_rec - recid + 1, cmd, basedev, blksize);
3817 rq_for_each_segment(bv, req, iter) {
3818 dst = page_address(bv.bv_page) + bv.bv_offset;
3819 if (dasd_page_cache) {
3820 char *copy = kmem_cache_alloc(dasd_page_cache,
3821 GFP_DMA | __GFP_NOWARN);
3822 if (copy && rq_data_dir(req) == WRITE)
3823 memcpy(copy + bv.bv_offset, dst, bv.bv_len);
3825 dst = copy + bv.bv_offset;
3827 for (off = 0; off < bv.bv_len; off += blksize) {
3828 sector_t trkid = recid;
3829 unsigned int recoffs = sector_div(trkid, blk_per_trk);
3832 /* Locate record for cdl special block ? */
3833 if (private->uses_cdl && recid < 2*blk_per_trk) {
3834 if (dasd_eckd_cdl_special(blk_per_trk, recid)){
3836 count = dasd_eckd_cdl_reclen(recid);
3837 if (count < blksize &&
3838 rq_data_dir(req) == READ)
3839 memset(dst + count, 0xe5,
3842 ccw[-1].flags |= CCW_FLAG_CC;
3843 locate_record(ccw++, LO_data++,
3845 1, rcmd, basedev, count);
3847 /* Locate record for standard blocks ? */
3848 if (private->uses_cdl && recid == 2*blk_per_trk) {
3849 ccw[-1].flags |= CCW_FLAG_CC;
3850 locate_record(ccw++, LO_data++,
3852 last_rec - recid + 1,
3853 cmd, basedev, count);
3855 /* Read/write ccw. */
3856 ccw[-1].flags |= CCW_FLAG_CC;
3857 ccw->cmd_code = rcmd;
3859 if (idal_is_needed(dst, blksize)) {
3860 ccw->cda = (__u32)(addr_t) idaws;
3861 ccw->flags = CCW_FLAG_IDA;
3862 idaws = idal_create_words(idaws, dst, blksize);
3864 ccw->cda = (__u32)(addr_t) dst;
3872 if (blk_noretry_request(req) ||
3873 block->base->features & DASD_FEATURE_FAILFAST)
3874 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
3875 cqr->startdev = startdev;
3876 cqr->memdev = startdev;
3878 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
3879 cqr->lpm = dasd_path_get_ppm(startdev);
3880 cqr->retries = startdev->default_retries;
3881 cqr->buildclk = get_tod_clock();
3882 cqr->status = DASD_CQR_FILLED;
3884 /* Set flags to suppress output for expected errors */
3885 if (dasd_eckd_is_ese(basedev)) {
3886 set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags);
3887 set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags);
3888 set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags);
3894 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track(
3895 struct dasd_device *startdev,
3896 struct dasd_block *block,
3897 struct request *req,
3902 unsigned int first_offs,
3903 unsigned int last_offs,
3904 unsigned int blk_per_trk,
3905 unsigned int blksize)
3907 unsigned long *idaws;
3908 struct dasd_ccw_req *cqr;
3910 struct req_iterator iter;
3912 char *dst, *idaw_dst;
3913 unsigned int cidaw, cplength, datasize;
3917 struct dasd_device *basedev;
3918 unsigned int trkcount, count, count_to_trk_end;
3919 unsigned int idaw_len, seg_len, part_len, len_to_track_end;
3920 unsigned char new_track, end_idaw;
3922 unsigned int recoffs;
3924 basedev = block->base;
3925 if (rq_data_dir(req) == READ)
3926 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
3927 else if (rq_data_dir(req) == WRITE)
3928 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
3930 return ERR_PTR(-EINVAL);
3932 /* Track based I/O needs IDAWs for each page, and not just for
3933 * 64 bit addresses. We need additional idals for pages
3934 * that get filled from two tracks, so we use the number
3935 * of records as upper limit.
3937 cidaw = last_rec - first_rec + 1;
3938 trkcount = last_trk - first_trk + 1;
3940 /* 1x prefix + one read/write ccw per track */
3941 cplength = 1 + trkcount;
3943 datasize = sizeof(struct PFX_eckd_data) + cidaw * sizeof(unsigned long);
3945 /* Allocate the ccw request. */
3946 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
3947 startdev, blk_mq_rq_to_pdu(req));
3951 /* transfer length factor: how many bytes to read from the last track */
3952 if (first_trk == last_trk)
3953 tlf = last_offs - first_offs + 1;
3955 tlf = last_offs + 1;
3958 if (prefix_LRE(ccw++, cqr->data, first_trk,
3959 last_trk, cmd, basedev, startdev,
3960 1 /* format */, first_offs + 1,
3963 /* Clock not in sync and XRC is enabled.
3966 dasd_sfree_request(cqr, startdev);
3967 return ERR_PTR(-EAGAIN);
3971 * The translation of request into ccw programs must meet the
3972 * following conditions:
3973 * - all idaws but the first and the last must address full pages
3974 * (or 2K blocks on 31-bit)
3975 * - the scope of a ccw and it's idal ends with the track boundaries
3977 idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data));
3981 len_to_track_end = 0;
3984 rq_for_each_segment(bv, req, iter) {
3985 dst = page_address(bv.bv_page) + bv.bv_offset;
3986 seg_len = bv.bv_len;
3990 recoffs = sector_div(trkid, blk_per_trk);
3991 count_to_trk_end = blk_per_trk - recoffs;
3992 count = min((last_rec - recid + 1),
3993 (sector_t)count_to_trk_end);
3994 len_to_track_end = count * blksize;
3995 ccw[-1].flags |= CCW_FLAG_CC;
3996 ccw->cmd_code = cmd;
3997 ccw->count = len_to_track_end;
3998 ccw->cda = (__u32)(addr_t)idaws;
3999 ccw->flags = CCW_FLAG_IDA;
4003 /* first idaw for a ccw may start anywhere */
4007 /* If we start a new idaw, we must make sure that it
4008 * starts on an IDA_BLOCK_SIZE boundary.
4009 * If we continue an idaw, we must make sure that the
4010 * current segment begins where the so far accumulated
4014 if (__pa(dst) & (IDA_BLOCK_SIZE-1)) {
4015 dasd_sfree_request(cqr, startdev);
4016 return ERR_PTR(-ERANGE);
4020 if ((idaw_dst + idaw_len) != dst) {
4021 dasd_sfree_request(cqr, startdev);
4022 return ERR_PTR(-ERANGE);
4024 part_len = min(seg_len, len_to_track_end);
4025 seg_len -= part_len;
4027 idaw_len += part_len;
4028 len_to_track_end -= part_len;
4029 /* collected memory area ends on an IDA_BLOCK border,
4031 * idal_create_words will handle cases where idaw_len
4032 * is larger then IDA_BLOCK_SIZE
4034 if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1)))
4036 /* We also need to end the idaw at track end */
4037 if (!len_to_track_end) {
4042 idaws = idal_create_words(idaws, idaw_dst,
4051 if (blk_noretry_request(req) ||
4052 block->base->features & DASD_FEATURE_FAILFAST)
4053 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
4054 cqr->startdev = startdev;
4055 cqr->memdev = startdev;
4057 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
4058 cqr->lpm = dasd_path_get_ppm(startdev);
4059 cqr->retries = startdev->default_retries;
4060 cqr->buildclk = get_tod_clock();
4061 cqr->status = DASD_CQR_FILLED;
4063 /* Set flags to suppress output for expected errors */
4064 if (dasd_eckd_is_ese(basedev))
4065 set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags);
4070 static int prepare_itcw(struct itcw *itcw,
4071 unsigned int trk, unsigned int totrk, int cmd,
4072 struct dasd_device *basedev,
4073 struct dasd_device *startdev,
4074 unsigned int rec_on_trk, int count,
4075 unsigned int blksize,
4076 unsigned int total_data_size,
4078 unsigned int blk_per_trk)
4080 struct PFX_eckd_data pfxdata;
4081 struct dasd_eckd_private *basepriv, *startpriv;
4082 struct DE_eckd_data *dedata;
4083 struct LRE_eckd_data *lredata;
4087 u16 heads, beghead, endhead;
4095 /* setup prefix data */
4096 basepriv = basedev->private;
4097 startpriv = startdev->private;
4098 dedata = &pfxdata.define_extent;
4099 lredata = &pfxdata.locate_record;
4101 memset(&pfxdata, 0, sizeof(pfxdata));
4102 pfxdata.format = 1; /* PFX with LRE */
4103 pfxdata.base_address = basepriv->ned->unit_addr;
4104 pfxdata.base_lss = basepriv->ned->ID;
4105 pfxdata.validity.define_extent = 1;
4107 /* private uid is kept up to date, conf_data may be outdated */
4108 if (startpriv->uid.type == UA_BASE_PAV_ALIAS)
4109 pfxdata.validity.verify_base = 1;
4111 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) {
4112 pfxdata.validity.verify_base = 1;
4113 pfxdata.validity.hyper_pav = 1;
4117 case DASD_ECKD_CCW_READ_TRACK_DATA:
4118 dedata->mask.perm = 0x1;
4119 dedata->attributes.operation = basepriv->attrib.operation;
4120 dedata->blk_size = blksize;
4121 dedata->ga_extended |= 0x42;
4122 lredata->operation.orientation = 0x0;
4123 lredata->operation.operation = 0x0C;
4124 lredata->auxiliary.check_bytes = 0x01;
4125 pfx_cmd = DASD_ECKD_CCW_PFX_READ;
4127 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
4128 dedata->mask.perm = 0x02;
4129 dedata->attributes.operation = basepriv->attrib.operation;
4130 dedata->blk_size = blksize;
4131 rc = set_timestamp(NULL, dedata, basedev);
4132 dedata->ga_extended |= 0x42;
4133 lredata->operation.orientation = 0x0;
4134 lredata->operation.operation = 0x3F;
4135 lredata->extended_operation = 0x23;
4136 lredata->auxiliary.check_bytes = 0x2;
4138 * If XRC is supported the System Time Stamp is set. The
4139 * validity of the time stamp must be reflected in the prefix
4142 if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02)
4143 pfxdata.validity.time_stamp = 1; /* 'Time Stamp Valid' */
4144 pfx_cmd = DASD_ECKD_CCW_PFX;
4146 case DASD_ECKD_CCW_READ_COUNT_MT:
4147 dedata->mask.perm = 0x1;
4148 dedata->attributes.operation = DASD_BYPASS_CACHE;
4149 dedata->ga_extended |= 0x42;
4150 dedata->blk_size = blksize;
4151 lredata->operation.orientation = 0x2;
4152 lredata->operation.operation = 0x16;
4153 lredata->auxiliary.check_bytes = 0x01;
4154 pfx_cmd = DASD_ECKD_CCW_PFX_READ;
4157 DBF_DEV_EVENT(DBF_ERR, basedev,
4158 "prepare itcw, unknown opcode 0x%x", cmd);
4165 dedata->attributes.mode = 0x3; /* ECKD */
4167 heads = basepriv->rdc_data.trk_per_cyl;
4168 begcyl = trk / heads;
4169 beghead = trk % heads;
4170 endcyl = totrk / heads;
4171 endhead = totrk % heads;
4173 /* check for sequential prestage - enhance cylinder range */
4174 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE ||
4175 dedata->attributes.operation == DASD_SEQ_ACCESS) {
4177 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl)
4178 endcyl += basepriv->attrib.nr_cyl;
4180 endcyl = (basepriv->real_cyl - 1);
4183 set_ch_t(&dedata->beg_ext, begcyl, beghead);
4184 set_ch_t(&dedata->end_ext, endcyl, endhead);
4186 dedata->ep_format = 0x20; /* records per track is valid */
4187 dedata->ep_rec_per_track = blk_per_trk;
4190 switch (basepriv->rdc_data.dev_type) {
4192 dn = ceil_quot(blksize + 6, 232);
4193 d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34);
4194 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
4197 d = 7 + ceil_quot(blksize + 12, 32);
4198 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
4203 if (cmd == DASD_ECKD_CCW_READ_COUNT_MT) {
4204 lredata->auxiliary.length_valid = 0;
4205 lredata->auxiliary.length_scope = 0;
4206 lredata->sector = 0xff;
4208 lredata->auxiliary.length_valid = 1;
4209 lredata->auxiliary.length_scope = 1;
4210 lredata->sector = sector;
4212 lredata->auxiliary.imbedded_ccw_valid = 1;
4213 lredata->length = tlf;
4214 lredata->imbedded_ccw = cmd;
4215 lredata->count = count;
4216 set_ch_t(&lredata->seek_addr, begcyl, beghead);
4217 lredata->search_arg.cyl = lredata->seek_addr.cyl;
4218 lredata->search_arg.head = lredata->seek_addr.head;
4219 lredata->search_arg.record = rec_on_trk;
4221 dcw = itcw_add_dcw(itcw, pfx_cmd, 0,
4222 &pfxdata, sizeof(pfxdata), total_data_size);
4223 return PTR_ERR_OR_ZERO(dcw);
4226 static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track(
4227 struct dasd_device *startdev,
4228 struct dasd_block *block,
4229 struct request *req,
4234 unsigned int first_offs,
4235 unsigned int last_offs,
4236 unsigned int blk_per_trk,
4237 unsigned int blksize)
4239 struct dasd_ccw_req *cqr;
4240 struct req_iterator iter;
4243 unsigned int trkcount, ctidaw;
4245 struct dasd_device *basedev;
4248 struct tidaw *last_tidaw = NULL;
4252 unsigned int seg_len, part_len, len_to_track_end;
4253 unsigned char new_track;
4254 sector_t recid, trkid;
4256 unsigned int count, count_to_trk_end;
4259 basedev = block->base;
4260 if (rq_data_dir(req) == READ) {
4261 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
4262 itcw_op = ITCW_OP_READ;
4263 } else if (rq_data_dir(req) == WRITE) {
4264 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
4265 itcw_op = ITCW_OP_WRITE;
4267 return ERR_PTR(-EINVAL);
4269 /* trackbased I/O needs address all memory via TIDAWs,
4270 * not just for 64 bit addresses. This allows us to map
4271 * each segment directly to one tidaw.
4272 * In the case of write requests, additional tidaws may
4273 * be needed when a segment crosses a track boundary.
4275 trkcount = last_trk - first_trk + 1;
4277 rq_for_each_segment(bv, req, iter) {
4280 if (rq_data_dir(req) == WRITE)
4281 ctidaw += (last_trk - first_trk);
4283 /* Allocate the ccw request. */
4284 itcw_size = itcw_calc_size(0, ctidaw, 0);
4285 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev,
4286 blk_mq_rq_to_pdu(req));
4290 /* transfer length factor: how many bytes to read from the last track */
4291 if (first_trk == last_trk)
4292 tlf = last_offs - first_offs + 1;
4294 tlf = last_offs + 1;
4297 itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0);
4302 cqr->cpaddr = itcw_get_tcw(itcw);
4303 if (prepare_itcw(itcw, first_trk, last_trk,
4304 cmd, basedev, startdev,
4307 (last_rec - first_rec + 1) * blksize,
4308 tlf, blk_per_trk) == -EAGAIN) {
4309 /* Clock not in sync and XRC is enabled.
4315 len_to_track_end = 0;
4317 * A tidaw can address 4k of memory, but must not cross page boundaries
4318 * We can let the block layer handle this by setting
4319 * blk_queue_segment_boundary to page boundaries and
4320 * blk_max_segment_size to page size when setting up the request queue.
4321 * For write requests, a TIDAW must not cross track boundaries, because
4322 * we have to set the CBC flag on the last tidaw for each track.
4324 if (rq_data_dir(req) == WRITE) {
4327 rq_for_each_segment(bv, req, iter) {
4328 dst = page_address(bv.bv_page) + bv.bv_offset;
4329 seg_len = bv.bv_len;
4333 offs = sector_div(trkid, blk_per_trk);
4334 count_to_trk_end = blk_per_trk - offs;
4335 count = min((last_rec - recid + 1),
4336 (sector_t)count_to_trk_end);
4337 len_to_track_end = count * blksize;
4341 part_len = min(seg_len, len_to_track_end);
4342 seg_len -= part_len;
4343 len_to_track_end -= part_len;
4344 /* We need to end the tidaw at track end */
4345 if (!len_to_track_end) {
4347 tidaw_flags = TIDAW_FLAGS_INSERT_CBC;
4350 last_tidaw = itcw_add_tidaw(itcw, tidaw_flags,
4352 if (IS_ERR(last_tidaw)) {
4360 rq_for_each_segment(bv, req, iter) {
4361 dst = page_address(bv.bv_page) + bv.bv_offset;
4362 last_tidaw = itcw_add_tidaw(itcw, 0x00,
4364 if (IS_ERR(last_tidaw)) {
4370 last_tidaw->flags |= TIDAW_FLAGS_LAST;
4371 last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC;
4372 itcw_finalize(itcw);
4374 if (blk_noretry_request(req) ||
4375 block->base->features & DASD_FEATURE_FAILFAST)
4376 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
4378 cqr->startdev = startdev;
4379 cqr->memdev = startdev;
4381 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
4382 cqr->lpm = dasd_path_get_ppm(startdev);
4383 cqr->retries = startdev->default_retries;
4384 cqr->buildclk = get_tod_clock();
4385 cqr->status = DASD_CQR_FILLED;
4387 /* Set flags to suppress output for expected errors */
4388 if (dasd_eckd_is_ese(basedev)) {
4389 set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags);
4390 set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags);
4391 set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags);
4396 dasd_sfree_request(cqr, startdev);
4397 return ERR_PTR(ret);
4400 static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev,
4401 struct dasd_block *block,
4402 struct request *req)
4407 struct dasd_eckd_private *private;
4408 struct dasd_device *basedev;
4409 sector_t first_rec, last_rec;
4410 sector_t first_trk, last_trk;
4411 unsigned int first_offs, last_offs;
4412 unsigned int blk_per_trk, blksize;
4414 unsigned int data_size;
4415 struct dasd_ccw_req *cqr;
4417 basedev = block->base;
4418 private = basedev->private;
4420 /* Calculate number of blocks/records per track. */
4421 blksize = block->bp_block;
4422 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
4423 if (blk_per_trk == 0)
4424 return ERR_PTR(-EINVAL);
4425 /* Calculate record id of first and last block. */
4426 first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift;
4427 first_offs = sector_div(first_trk, blk_per_trk);
4428 last_rec = last_trk =
4429 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift;
4430 last_offs = sector_div(last_trk, blk_per_trk);
4431 cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk);
4433 fcx_multitrack = private->features.feature[40] & 0x20;
4434 data_size = blk_rq_bytes(req);
4435 if (data_size % blksize)
4436 return ERR_PTR(-EINVAL);
4437 /* tpm write request add CBC data on each track boundary */
4438 if (rq_data_dir(req) == WRITE)
4439 data_size += (last_trk - first_trk) * 4;
4441 /* is read track data and write track data in command mode supported? */
4442 cmdrtd = private->features.feature[9] & 0x20;
4443 cmdwtd = private->features.feature[12] & 0x40;
4444 use_prefix = private->features.feature[8] & 0x01;
4446 if (req_op(req) == REQ_OP_DISCARD)
4447 return dasd_eckd_build_cp_discard(startdev, block, req,
4448 first_trk, last_trk);
4451 if (cdlspecial || dasd_page_cache) {
4452 /* do nothing, just fall through to the cmd mode single case */
4453 } else if ((data_size <= private->fcx_max_data)
4454 && (fcx_multitrack || (first_trk == last_trk))) {
4455 cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req,
4456 first_rec, last_rec,
4457 first_trk, last_trk,
4458 first_offs, last_offs,
4459 blk_per_trk, blksize);
4460 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) &&
4461 (PTR_ERR(cqr) != -ENOMEM))
4463 } else if (use_prefix &&
4464 (((rq_data_dir(req) == READ) && cmdrtd) ||
4465 ((rq_data_dir(req) == WRITE) && cmdwtd))) {
4466 cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req,
4467 first_rec, last_rec,
4468 first_trk, last_trk,
4469 first_offs, last_offs,
4470 blk_per_trk, blksize);
4471 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) &&
4472 (PTR_ERR(cqr) != -ENOMEM))
4476 cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req,
4477 first_rec, last_rec,
4478 first_trk, last_trk,
4479 first_offs, last_offs,
4480 blk_per_trk, blksize);
4484 static struct dasd_ccw_req *dasd_eckd_build_cp_raw(struct dasd_device *startdev,
4485 struct dasd_block *block,
4486 struct request *req)
4488 sector_t start_padding_sectors, end_sector_offset, end_padding_sectors;
4489 unsigned int seg_len, len_to_track_end;
4490 unsigned int cidaw, cplength, datasize;
4491 sector_t first_trk, last_trk, sectors;
4492 struct dasd_eckd_private *base_priv;
4493 struct dasd_device *basedev;
4494 struct req_iterator iter;
4495 struct dasd_ccw_req *cqr;
4496 unsigned int first_offs;
4497 unsigned int trkcount;
4498 unsigned long *idaws;
4508 * raw track access needs to be mutiple of 64k and on 64k boundary
4509 * For read requests we can fix an incorrect alignment by padding
4510 * the request with dummy pages.
4512 start_padding_sectors = blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK;
4513 end_sector_offset = (blk_rq_pos(req) + blk_rq_sectors(req)) %
4514 DASD_RAW_SECTORS_PER_TRACK;
4515 end_padding_sectors = (DASD_RAW_SECTORS_PER_TRACK - end_sector_offset) %
4516 DASD_RAW_SECTORS_PER_TRACK;
4517 basedev = block->base;
4518 if ((start_padding_sectors || end_padding_sectors) &&
4519 (rq_data_dir(req) == WRITE)) {
4520 DBF_DEV_EVENT(DBF_ERR, basedev,
4521 "raw write not track aligned (%llu,%llu) req %p",
4522 start_padding_sectors, end_padding_sectors, req);
4523 return ERR_PTR(-EINVAL);
4526 first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK;
4527 last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) /
4528 DASD_RAW_SECTORS_PER_TRACK;
4529 trkcount = last_trk - first_trk + 1;
4532 if (rq_data_dir(req) == READ)
4533 cmd = DASD_ECKD_CCW_READ_TRACK;
4534 else if (rq_data_dir(req) == WRITE)
4535 cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK;
4537 return ERR_PTR(-EINVAL);
4540 * Raw track based I/O needs IDAWs for each page,
4541 * and not just for 64 bit addresses.
4543 cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK;
4546 * struct PFX_eckd_data and struct LRE_eckd_data can have up to 2 bytes
4547 * of extended parameter. This is needed for write full track.
4549 base_priv = basedev->private;
4550 use_prefix = base_priv->features.feature[8] & 0x01;
4552 cplength = 1 + trkcount;
4553 size = sizeof(struct PFX_eckd_data) + 2;
4555 cplength = 2 + trkcount;
4556 size = sizeof(struct DE_eckd_data) +
4557 sizeof(struct LRE_eckd_data) + 2;
4559 size = ALIGN(size, 8);
4561 datasize = size + cidaw * sizeof(unsigned long);
4563 /* Allocate the ccw request. */
4564 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength,
4565 datasize, startdev, blk_mq_rq_to_pdu(req));
4573 prefix_LRE(ccw++, data, first_trk, last_trk, cmd, basedev,
4574 startdev, 1, first_offs + 1, trkcount, 0, 0);
4576 define_extent(ccw++, data, first_trk, last_trk, cmd, basedev, 0);
4577 ccw[-1].flags |= CCW_FLAG_CC;
4579 data += sizeof(struct DE_eckd_data);
4580 locate_record_ext(ccw++, data, first_trk, first_offs + 1,
4581 trkcount, cmd, basedev, 0, 0);
4584 idaws = (unsigned long *)(cqr->data + size);
4585 len_to_track_end = 0;
4586 if (start_padding_sectors) {
4587 ccw[-1].flags |= CCW_FLAG_CC;
4588 ccw->cmd_code = cmd;
4589 /* maximum 3390 track size */
4591 /* 64k map to one track */
4592 len_to_track_end = 65536 - start_padding_sectors * 512;
4593 ccw->cda = (__u32)(addr_t)idaws;
4594 ccw->flags |= CCW_FLAG_IDA;
4595 ccw->flags |= CCW_FLAG_SLI;
4597 for (sectors = 0; sectors < start_padding_sectors; sectors += 8)
4598 idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE);
4600 rq_for_each_segment(bv, req, iter) {
4601 dst = page_address(bv.bv_page) + bv.bv_offset;
4602 seg_len = bv.bv_len;
4603 if (cmd == DASD_ECKD_CCW_READ_TRACK)
4604 memset(dst, 0, seg_len);
4605 if (!len_to_track_end) {
4606 ccw[-1].flags |= CCW_FLAG_CC;
4607 ccw->cmd_code = cmd;
4608 /* maximum 3390 track size */
4610 /* 64k map to one track */
4611 len_to_track_end = 65536;
4612 ccw->cda = (__u32)(addr_t)idaws;
4613 ccw->flags |= CCW_FLAG_IDA;
4614 ccw->flags |= CCW_FLAG_SLI;
4617 len_to_track_end -= seg_len;
4618 idaws = idal_create_words(idaws, dst, seg_len);
4620 for (sectors = 0; sectors < end_padding_sectors; sectors += 8)
4621 idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE);
4622 if (blk_noretry_request(req) ||
4623 block->base->features & DASD_FEATURE_FAILFAST)
4624 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
4625 cqr->startdev = startdev;
4626 cqr->memdev = startdev;
4628 cqr->expires = startdev->default_expires * HZ;
4629 cqr->lpm = dasd_path_get_ppm(startdev);
4630 cqr->retries = startdev->default_retries;
4631 cqr->buildclk = get_tod_clock();
4632 cqr->status = DASD_CQR_FILLED;
4639 dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req)
4641 struct dasd_eckd_private *private;
4643 struct req_iterator iter;
4646 unsigned int blksize, blk_per_trk, off;
4650 if (!dasd_page_cache)
4652 private = cqr->block->base->private;
4653 blksize = cqr->block->bp_block;
4654 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
4655 recid = blk_rq_pos(req) >> cqr->block->s2b_shift;
4657 /* Skip over define extent & locate record. */
4659 if (private->uses_cdl == 0 || recid > 2*blk_per_trk)
4661 rq_for_each_segment(bv, req, iter) {
4662 dst = page_address(bv.bv_page) + bv.bv_offset;
4663 for (off = 0; off < bv.bv_len; off += blksize) {
4664 /* Skip locate record. */
4665 if (private->uses_cdl && recid <= 2*blk_per_trk)
4668 if (ccw->flags & CCW_FLAG_IDA)
4669 cda = *((char **)((addr_t) ccw->cda));
4671 cda = (char *)((addr_t) ccw->cda);
4673 if (rq_data_dir(req) == READ)
4674 memcpy(dst, cda, bv.bv_len);
4675 kmem_cache_free(dasd_page_cache,
4676 (void *)((addr_t)cda & PAGE_MASK));
4685 status = cqr->status == DASD_CQR_DONE;
4686 dasd_sfree_request(cqr, cqr->memdev);
4691 * Modify ccw/tcw in cqr so it can be started on a base device.
4693 * Note that this is not enough to restart the cqr!
4694 * Either reset cqr->startdev as well (summary unit check handling)
4695 * or restart via separate cqr (as in ERP handling).
4697 void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr)
4700 struct PFX_eckd_data *pfxdata;
4705 if (cqr->cpmode == 1) {
4707 tccb = tcw_get_tccb(tcw);
4708 dcw = (struct dcw *)&tccb->tca[0];
4709 pfxdata = (struct PFX_eckd_data *)&dcw->cd[0];
4710 pfxdata->validity.verify_base = 0;
4711 pfxdata->validity.hyper_pav = 0;
4714 pfxdata = cqr->data;
4715 if (ccw->cmd_code == DASD_ECKD_CCW_PFX) {
4716 pfxdata->validity.verify_base = 0;
4717 pfxdata->validity.hyper_pav = 0;
4722 #define DASD_ECKD_CHANQ_MAX_SIZE 4
4724 static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base,
4725 struct dasd_block *block,
4726 struct request *req)
4728 struct dasd_device *startdev = NULL;
4729 struct dasd_eckd_private *private;
4730 struct dasd_ccw_req *cqr;
4731 unsigned long flags;
4733 /* Discard requests can only be processed on base devices */
4734 if (req_op(req) != REQ_OP_DISCARD)
4735 startdev = dasd_alias_get_start_dev(base);
4738 private = startdev->private;
4739 if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE)
4740 return ERR_PTR(-EBUSY);
4742 spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags);
4744 if ((base->features & DASD_FEATURE_USERAW))
4745 cqr = dasd_eckd_build_cp_raw(startdev, block, req);
4747 cqr = dasd_eckd_build_cp(startdev, block, req);
4750 spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags);
4754 static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr,
4755 struct request *req)
4757 struct dasd_eckd_private *private;
4758 unsigned long flags;
4760 spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags);
4761 private = cqr->memdev->private;
4763 spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags);
4764 return dasd_eckd_free_cp(cqr, req);
4768 dasd_eckd_fill_info(struct dasd_device * device,
4769 struct dasd_information2_t * info)
4771 struct dasd_eckd_private *private = device->private;
4773 info->label_block = 2;
4774 info->FBA_layout = private->uses_cdl ? 0 : 1;
4775 info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL;
4776 info->characteristics_size = sizeof(private->rdc_data);
4777 memcpy(info->characteristics, &private->rdc_data,
4778 sizeof(private->rdc_data));
4779 info->confdata_size = min((unsigned long)private->conf_len,
4780 sizeof(info->configuration_data));
4781 memcpy(info->configuration_data, private->conf_data,
4782 info->confdata_size);
4787 * SECTION: ioctl functions for eckd devices.
4791 * Release device ioctl.
4792 * Buils a channel programm to releases a prior reserved
4793 * (see dasd_eckd_reserve) device.
4796 dasd_eckd_release(struct dasd_device *device)
4798 struct dasd_ccw_req *cqr;
4803 if (!capable(CAP_SYS_ADMIN))
4807 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL);
4809 mutex_lock(&dasd_reserve_mutex);
4811 cqr = &dasd_reserve_req->cqr;
4812 memset(cqr, 0, sizeof(*cqr));
4813 memset(&dasd_reserve_req->ccw, 0,
4814 sizeof(dasd_reserve_req->ccw));
4815 cqr->cpaddr = &dasd_reserve_req->ccw;
4816 cqr->data = &dasd_reserve_req->data;
4817 cqr->magic = DASD_ECKD_MAGIC;
4820 ccw->cmd_code = DASD_ECKD_CCW_RELEASE;
4821 ccw->flags |= CCW_FLAG_SLI;
4823 ccw->cda = (__u32)(addr_t) cqr->data;
4824 cqr->startdev = device;
4825 cqr->memdev = device;
4826 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
4827 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
4828 cqr->retries = 2; /* set retry counter to enable basic ERP */
4829 cqr->expires = 2 * HZ;
4830 cqr->buildclk = get_tod_clock();
4831 cqr->status = DASD_CQR_FILLED;
4833 rc = dasd_sleep_on_immediatly(cqr);
4835 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags);
4838 mutex_unlock(&dasd_reserve_mutex);
4840 dasd_sfree_request(cqr, cqr->memdev);
4845 * Reserve device ioctl.
4846 * Options are set to 'synchronous wait for interrupt' and
4847 * 'timeout the request'. This leads to a terminate IO if
4848 * the interrupt is outstanding for a certain time.
4851 dasd_eckd_reserve(struct dasd_device *device)
4853 struct dasd_ccw_req *cqr;
4858 if (!capable(CAP_SYS_ADMIN))
4862 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL);
4864 mutex_lock(&dasd_reserve_mutex);
4866 cqr = &dasd_reserve_req->cqr;
4867 memset(cqr, 0, sizeof(*cqr));
4868 memset(&dasd_reserve_req->ccw, 0,
4869 sizeof(dasd_reserve_req->ccw));
4870 cqr->cpaddr = &dasd_reserve_req->ccw;
4871 cqr->data = &dasd_reserve_req->data;
4872 cqr->magic = DASD_ECKD_MAGIC;
4875 ccw->cmd_code = DASD_ECKD_CCW_RESERVE;
4876 ccw->flags |= CCW_FLAG_SLI;
4878 ccw->cda = (__u32)(addr_t) cqr->data;
4879 cqr->startdev = device;
4880 cqr->memdev = device;
4881 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
4882 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
4883 cqr->retries = 2; /* set retry counter to enable basic ERP */
4884 cqr->expires = 2 * HZ;
4885 cqr->buildclk = get_tod_clock();
4886 cqr->status = DASD_CQR_FILLED;
4888 rc = dasd_sleep_on_immediatly(cqr);
4890 set_bit(DASD_FLAG_IS_RESERVED, &device->flags);
4893 mutex_unlock(&dasd_reserve_mutex);
4895 dasd_sfree_request(cqr, cqr->memdev);
4900 * Steal lock ioctl - unconditional reserve device.
4901 * Buils a channel programm to break a device's reservation.
4902 * (unconditional reserve)
4905 dasd_eckd_steal_lock(struct dasd_device *device)
4907 struct dasd_ccw_req *cqr;
4912 if (!capable(CAP_SYS_ADMIN))
4916 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL);
4918 mutex_lock(&dasd_reserve_mutex);
4920 cqr = &dasd_reserve_req->cqr;
4921 memset(cqr, 0, sizeof(*cqr));
4922 memset(&dasd_reserve_req->ccw, 0,
4923 sizeof(dasd_reserve_req->ccw));
4924 cqr->cpaddr = &dasd_reserve_req->ccw;
4925 cqr->data = &dasd_reserve_req->data;
4926 cqr->magic = DASD_ECKD_MAGIC;
4929 ccw->cmd_code = DASD_ECKD_CCW_SLCK;
4930 ccw->flags |= CCW_FLAG_SLI;
4932 ccw->cda = (__u32)(addr_t) cqr->data;
4933 cqr->startdev = device;
4934 cqr->memdev = device;
4935 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
4936 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
4937 cqr->retries = 2; /* set retry counter to enable basic ERP */
4938 cqr->expires = 2 * HZ;
4939 cqr->buildclk = get_tod_clock();
4940 cqr->status = DASD_CQR_FILLED;
4942 rc = dasd_sleep_on_immediatly(cqr);
4944 set_bit(DASD_FLAG_IS_RESERVED, &device->flags);
4947 mutex_unlock(&dasd_reserve_mutex);
4949 dasd_sfree_request(cqr, cqr->memdev);
4954 * SNID - Sense Path Group ID
4955 * This ioctl may be used in situations where I/O is stalled due to
4956 * a reserve, so if the normal dasd_smalloc_request fails, we use the
4957 * preallocated dasd_reserve_req.
4959 static int dasd_eckd_snid(struct dasd_device *device,
4962 struct dasd_ccw_req *cqr;
4966 struct dasd_snid_ioctl_data usrparm;
4968 if (!capable(CAP_SYS_ADMIN))
4971 if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
4975 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1,
4976 sizeof(struct dasd_snid_data), device,
4979 mutex_lock(&dasd_reserve_mutex);
4981 cqr = &dasd_reserve_req->cqr;
4982 memset(cqr, 0, sizeof(*cqr));
4983 memset(&dasd_reserve_req->ccw, 0,
4984 sizeof(dasd_reserve_req->ccw));
4985 cqr->cpaddr = &dasd_reserve_req->ccw;
4986 cqr->data = &dasd_reserve_req->data;
4987 cqr->magic = DASD_ECKD_MAGIC;
4990 ccw->cmd_code = DASD_ECKD_CCW_SNID;
4991 ccw->flags |= CCW_FLAG_SLI;
4993 ccw->cda = (__u32)(addr_t) cqr->data;
4994 cqr->startdev = device;
4995 cqr->memdev = device;
4996 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
4997 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
4998 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags);
5000 cqr->expires = 10 * HZ;
5001 cqr->buildclk = get_tod_clock();
5002 cqr->status = DASD_CQR_FILLED;
5003 cqr->lpm = usrparm.path_mask;
5005 rc = dasd_sleep_on_immediatly(cqr);
5006 /* verify that I/O processing didn't modify the path mask */
5007 if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask))
5010 usrparm.data = *((struct dasd_snid_data *)cqr->data);
5011 if (copy_to_user(argp, &usrparm, sizeof(usrparm)))
5016 mutex_unlock(&dasd_reserve_mutex);
5018 dasd_sfree_request(cqr, cqr->memdev);
5023 * Read performance statistics
5026 dasd_eckd_performance(struct dasd_device *device, void __user *argp)
5028 struct dasd_psf_prssd_data *prssdp;
5029 struct dasd_rssd_perf_stats_t *stats;
5030 struct dasd_ccw_req *cqr;
5034 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
5035 (sizeof(struct dasd_psf_prssd_data) +
5036 sizeof(struct dasd_rssd_perf_stats_t)),
5039 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
5040 "Could not allocate initialization request");
5041 return PTR_ERR(cqr);
5043 cqr->startdev = device;
5044 cqr->memdev = device;
5046 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
5047 cqr->expires = 10 * HZ;
5049 /* Prepare for Read Subsystem Data */
5050 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
5051 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
5052 prssdp->order = PSF_ORDER_PRSSD;
5053 prssdp->suborder = 0x01; /* Performance Statistics */
5054 prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */
5057 ccw->cmd_code = DASD_ECKD_CCW_PSF;
5058 ccw->count = sizeof(struct dasd_psf_prssd_data);
5059 ccw->flags |= CCW_FLAG_CC;
5060 ccw->cda = (__u32)(addr_t) prssdp;
5062 /* Read Subsystem Data - Performance Statistics */
5063 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
5064 memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t));
5067 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
5068 ccw->count = sizeof(struct dasd_rssd_perf_stats_t);
5069 ccw->cda = (__u32)(addr_t) stats;
5071 cqr->buildclk = get_tod_clock();
5072 cqr->status = DASD_CQR_FILLED;
5073 rc = dasd_sleep_on(cqr);
5075 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
5076 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
5077 if (copy_to_user(argp, stats,
5078 sizeof(struct dasd_rssd_perf_stats_t)))
5081 dasd_sfree_request(cqr, cqr->memdev);
5086 * Get attributes (cache operations)
5087 * Returnes the cache attributes used in Define Extend (DE).
5090 dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp)
5092 struct dasd_eckd_private *private = device->private;
5093 struct attrib_data_t attrib = private->attrib;
5096 if (!capable(CAP_SYS_ADMIN))
5102 if (copy_to_user(argp, (long *) &attrib,
5103 sizeof(struct attrib_data_t)))
5110 * Set attributes (cache operations)
5111 * Stores the attributes for cache operation to be used in Define Extend (DE).
5114 dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp)
5116 struct dasd_eckd_private *private = device->private;
5117 struct attrib_data_t attrib;
5119 if (!capable(CAP_SYS_ADMIN))
5124 if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t)))
5126 private->attrib = attrib;
5128 dev_info(&device->cdev->dev,
5129 "The DASD cache mode was set to %x (%i cylinder prestage)\n",
5130 private->attrib.operation, private->attrib.nr_cyl);
5135 * Issue syscall I/O to EMC Symmetrix array.
5136 * CCWs are PSF and RSSD
5138 static int dasd_symm_io(struct dasd_device *device, void __user *argp)
5140 struct dasd_symmio_parms usrparm;
5141 char *psf_data, *rssd_result;
5142 struct dasd_ccw_req *cqr;
5147 if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
5151 /* Copy parms from caller */
5153 if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
5155 if (is_compat_task()) {
5156 /* Make sure pointers are sane even on 31 bit. */
5158 if ((usrparm.psf_data >> 32) != 0)
5160 if ((usrparm.rssd_result >> 32) != 0)
5162 usrparm.psf_data &= 0x7fffffffULL;
5163 usrparm.rssd_result &= 0x7fffffffULL;
5165 /* at least 2 bytes are accessed and should be allocated */
5166 if (usrparm.psf_data_len < 2) {
5167 DBF_DEV_EVENT(DBF_WARNING, device,
5168 "Symmetrix ioctl invalid data length %d",
5169 usrparm.psf_data_len);
5173 /* alloc I/O data area */
5174 psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA);
5175 rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA);
5176 if (!psf_data || !rssd_result) {
5181 /* get syscall header from user space */
5183 if (copy_from_user(psf_data,
5184 (void __user *)(unsigned long) usrparm.psf_data,
5185 usrparm.psf_data_len))
5190 /* setup CCWs for PSF + RSSD */
5191 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2, 0, device, NULL);
5193 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
5194 "Could not allocate initialization request");
5199 cqr->startdev = device;
5200 cqr->memdev = device;
5202 cqr->expires = 10 * HZ;
5203 cqr->buildclk = get_tod_clock();
5204 cqr->status = DASD_CQR_FILLED;
5206 /* Build the ccws */
5210 ccw->cmd_code = DASD_ECKD_CCW_PSF;
5211 ccw->count = usrparm.psf_data_len;
5212 ccw->flags |= CCW_FLAG_CC;
5213 ccw->cda = (__u32)(addr_t) psf_data;
5218 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
5219 ccw->count = usrparm.rssd_result_len;
5220 ccw->flags = CCW_FLAG_SLI ;
5221 ccw->cda = (__u32)(addr_t) rssd_result;
5223 rc = dasd_sleep_on(cqr);
5228 if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result,
5229 rssd_result, usrparm.rssd_result_len))
5234 dasd_sfree_request(cqr, cqr->memdev);
5239 DBF_DEV_EVENT(DBF_WARNING, device,
5240 "Symmetrix ioctl (0x%02x 0x%02x): rc=%d",
5241 (int) psf0, (int) psf1, rc);
5246 dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp)
5248 struct dasd_device *device = block->base;
5252 return dasd_eckd_get_attrib(device, argp);
5254 return dasd_eckd_set_attrib(device, argp);
5256 return dasd_eckd_performance(device, argp);
5258 return dasd_eckd_release(device);
5260 return dasd_eckd_reserve(device);
5262 return dasd_eckd_steal_lock(device);
5264 return dasd_eckd_snid(device, argp);
5266 return dasd_symm_io(device, argp);
5273 * Dump the range of CCWs into 'page' buffer
5274 * and return number of printed chars.
5277 dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page)
5283 while (from <= to) {
5284 len += sprintf(page + len, PRINTK_HEADER
5285 " CCW %p: %08X %08X DAT:",
5286 from, ((int *) from)[0], ((int *) from)[1]);
5288 /* get pointer to data (consider IDALs) */
5289 if (from->flags & CCW_FLAG_IDA)
5290 datap = (char *) *((addr_t *) (addr_t) from->cda);
5292 datap = (char *) ((addr_t) from->cda);
5294 /* dump data (max 32 bytes) */
5295 for (count = 0; count < from->count && count < 32; count++) {
5296 if (count % 8 == 0) len += sprintf(page + len, " ");
5297 if (count % 4 == 0) len += sprintf(page + len, " ");
5298 len += sprintf(page + len, "%02x", datap[count]);
5300 len += sprintf(page + len, "\n");
5307 dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb,
5313 sense = (u64 *) dasd_get_sense(irb);
5314 stat = (u64 *) &irb->scsw;
5316 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : "
5317 "%016llx %016llx %016llx %016llx",
5318 reason, *stat, *((u32 *) (stat + 1)),
5319 sense[0], sense[1], sense[2], sense[3]);
5321 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s",
5322 reason, *stat, *((u32 *) (stat + 1)),
5328 * Print sense data and related channel program.
5329 * Parts are printed because printk buffer is only 1024 bytes.
5331 static void dasd_eckd_dump_sense_ccw(struct dasd_device *device,
5332 struct dasd_ccw_req *req, struct irb *irb)
5335 struct ccw1 *first, *last, *fail, *from, *to;
5338 page = (char *) get_zeroed_page(GFP_ATOMIC);
5340 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
5341 "No memory to dump sense data\n");
5344 /* dump the sense data */
5345 len = sprintf(page, PRINTK_HEADER
5346 " I/O status report for device %s:\n",
5347 dev_name(&device->cdev->dev));
5348 len += sprintf(page + len, PRINTK_HEADER
5349 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X "
5351 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw),
5352 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw),
5353 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw),
5354 req ? req->intrc : 0);
5355 len += sprintf(page + len, PRINTK_HEADER
5356 " device %s: Failing CCW: %p\n",
5357 dev_name(&device->cdev->dev),
5358 (void *) (addr_t) irb->scsw.cmd.cpa);
5359 if (irb->esw.esw0.erw.cons) {
5360 for (sl = 0; sl < 4; sl++) {
5361 len += sprintf(page + len, PRINTK_HEADER
5362 " Sense(hex) %2d-%2d:",
5363 (8 * sl), ((8 * sl) + 7));
5365 for (sct = 0; sct < 8; sct++) {
5366 len += sprintf(page + len, " %02x",
5367 irb->ecw[8 * sl + sct]);
5369 len += sprintf(page + len, "\n");
5372 if (irb->ecw[27] & DASD_SENSE_BIT_0) {
5373 /* 24 Byte Sense Data */
5374 sprintf(page + len, PRINTK_HEADER
5375 " 24 Byte: %x MSG %x, "
5376 "%s MSGb to SYSOP\n",
5377 irb->ecw[7] >> 4, irb->ecw[7] & 0x0f,
5378 irb->ecw[1] & 0x10 ? "" : "no");
5380 /* 32 Byte Sense Data */
5381 sprintf(page + len, PRINTK_HEADER
5382 " 32 Byte: Format: %x "
5383 "Exception class %x\n",
5384 irb->ecw[6] & 0x0f, irb->ecw[22] >> 4);
5387 sprintf(page + len, PRINTK_HEADER
5388 " SORRY - NO VALID SENSE AVAILABLE\n");
5390 printk(KERN_ERR "%s", page);
5393 /* req == NULL for unsolicited interrupts */
5394 /* dump the Channel Program (max 140 Bytes per line) */
5395 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */
5396 first = req->cpaddr;
5397 for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++);
5398 to = min(first + 6, last);
5399 len = sprintf(page, PRINTK_HEADER
5400 " Related CP in req: %p\n", req);
5401 dasd_eckd_dump_ccw_range(first, to, page + len);
5402 printk(KERN_ERR "%s", page);
5404 /* print failing CCW area (maximum 4) */
5405 /* scsw->cda is either valid or zero */
5408 fail = (struct ccw1 *)(addr_t)
5409 irb->scsw.cmd.cpa; /* failing CCW */
5410 if (from < fail - 2) {
5411 from = fail - 2; /* there is a gap - print header */
5412 len += sprintf(page, PRINTK_HEADER "......\n");
5414 to = min(fail + 1, last);
5415 len += dasd_eckd_dump_ccw_range(from, to, page + len);
5417 /* print last CCWs (maximum 2) */
5418 from = max(from, ++to);
5419 if (from < last - 1) {
5420 from = last - 1; /* there is a gap - print header */
5421 len += sprintf(page + len, PRINTK_HEADER "......\n");
5423 len += dasd_eckd_dump_ccw_range(from, last, page + len);
5425 printk(KERN_ERR "%s", page);
5427 free_page((unsigned long) page);
5432 * Print sense data from a tcw.
5434 static void dasd_eckd_dump_sense_tcw(struct dasd_device *device,
5435 struct dasd_ccw_req *req, struct irb *irb)
5438 int len, sl, sct, residual;
5442 page = (char *) get_zeroed_page(GFP_ATOMIC);
5444 DBF_DEV_EVENT(DBF_WARNING, device, " %s",
5445 "No memory to dump sense data");
5448 /* dump the sense data */
5449 len = sprintf(page, PRINTK_HEADER
5450 " I/O status report for device %s:\n",
5451 dev_name(&device->cdev->dev));
5452 len += sprintf(page + len, PRINTK_HEADER
5453 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X "
5454 "CS:%02X fcxs:%02X schxs:%02X RC:%d\n",
5455 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw),
5456 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw),
5457 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw),
5459 (irb->scsw.tm.ifob << 7) | irb->scsw.tm.sesq,
5460 req ? req->intrc : 0);
5461 len += sprintf(page + len, PRINTK_HEADER
5462 " device %s: Failing TCW: %p\n",
5463 dev_name(&device->cdev->dev),
5464 (void *) (addr_t) irb->scsw.tm.tcw);
5468 if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01))
5470 (struct tcw *)(unsigned long)irb->scsw.tm.tcw);
5473 len += sprintf(page + len, PRINTK_HEADER
5474 " tsb->length %d\n", tsb->length);
5475 len += sprintf(page + len, PRINTK_HEADER
5476 " tsb->flags %x\n", tsb->flags);
5477 len += sprintf(page + len, PRINTK_HEADER
5478 " tsb->dcw_offset %d\n", tsb->dcw_offset);
5479 len += sprintf(page + len, PRINTK_HEADER
5480 " tsb->count %d\n", tsb->count);
5481 residual = tsb->count - 28;
5482 len += sprintf(page + len, PRINTK_HEADER
5483 " residual %d\n", residual);
5485 switch (tsb->flags & 0x07) {
5486 case 1: /* tsa_iostat */
5487 len += sprintf(page + len, PRINTK_HEADER
5488 " tsb->tsa.iostat.dev_time %d\n",
5489 tsb->tsa.iostat.dev_time);
5490 len += sprintf(page + len, PRINTK_HEADER
5491 " tsb->tsa.iostat.def_time %d\n",
5492 tsb->tsa.iostat.def_time);
5493 len += sprintf(page + len, PRINTK_HEADER
5494 " tsb->tsa.iostat.queue_time %d\n",
5495 tsb->tsa.iostat.queue_time);
5496 len += sprintf(page + len, PRINTK_HEADER
5497 " tsb->tsa.iostat.dev_busy_time %d\n",
5498 tsb->tsa.iostat.dev_busy_time);
5499 len += sprintf(page + len, PRINTK_HEADER
5500 " tsb->tsa.iostat.dev_act_time %d\n",
5501 tsb->tsa.iostat.dev_act_time);
5502 sense = tsb->tsa.iostat.sense;
5504 case 2: /* ts_ddpc */
5505 len += sprintf(page + len, PRINTK_HEADER
5506 " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc);
5507 for (sl = 0; sl < 2; sl++) {
5508 len += sprintf(page + len, PRINTK_HEADER
5509 " tsb->tsa.ddpc.rcq %2d-%2d: ",
5510 (8 * sl), ((8 * sl) + 7));
5511 rcq = tsb->tsa.ddpc.rcq;
5512 for (sct = 0; sct < 8; sct++) {
5513 len += sprintf(page + len, " %02x",
5516 len += sprintf(page + len, "\n");
5518 sense = tsb->tsa.ddpc.sense;
5520 case 3: /* tsa_intrg */
5521 len += sprintf(page + len, PRINTK_HEADER
5522 " tsb->tsa.intrg.: not supported yet\n");
5527 for (sl = 0; sl < 4; sl++) {
5528 len += sprintf(page + len, PRINTK_HEADER
5529 " Sense(hex) %2d-%2d:",
5530 (8 * sl), ((8 * sl) + 7));
5531 for (sct = 0; sct < 8; sct++) {
5532 len += sprintf(page + len, " %02x",
5533 sense[8 * sl + sct]);
5535 len += sprintf(page + len, "\n");
5538 if (sense[27] & DASD_SENSE_BIT_0) {
5539 /* 24 Byte Sense Data */
5540 sprintf(page + len, PRINTK_HEADER
5541 " 24 Byte: %x MSG %x, "
5542 "%s MSGb to SYSOP\n",
5543 sense[7] >> 4, sense[7] & 0x0f,
5544 sense[1] & 0x10 ? "" : "no");
5546 /* 32 Byte Sense Data */
5547 sprintf(page + len, PRINTK_HEADER
5548 " 32 Byte: Format: %x "
5549 "Exception class %x\n",
5550 sense[6] & 0x0f, sense[22] >> 4);
5553 sprintf(page + len, PRINTK_HEADER
5554 " SORRY - NO VALID SENSE AVAILABLE\n");
5557 sprintf(page + len, PRINTK_HEADER
5558 " SORRY - NO TSB DATA AVAILABLE\n");
5560 printk(KERN_ERR "%s", page);
5561 free_page((unsigned long) page);
5564 static void dasd_eckd_dump_sense(struct dasd_device *device,
5565 struct dasd_ccw_req *req, struct irb *irb)
5567 u8 *sense = dasd_get_sense(irb);
5569 if (scsw_is_tm(&irb->scsw)) {
5571 * In some cases the 'File Protected' or 'Incorrect Length'
5572 * error might be expected and log messages shouldn't be written
5573 * then. Check if the according suppress bit is set.
5575 if (sense && (sense[1] & SNS1_FILE_PROTECTED) &&
5576 test_bit(DASD_CQR_SUPPRESS_FP, &req->flags))
5578 if (scsw_cstat(&irb->scsw) == 0x40 &&
5579 test_bit(DASD_CQR_SUPPRESS_IL, &req->flags))
5582 dasd_eckd_dump_sense_tcw(device, req, irb);
5585 * In some cases the 'Command Reject' or 'No Record Found'
5586 * error might be expected and log messages shouldn't be
5587 * written then. Check if the according suppress bit is set.
5589 if (sense && sense[0] & SNS0_CMD_REJECT &&
5590 test_bit(DASD_CQR_SUPPRESS_CR, &req->flags))
5593 if (sense && sense[1] & SNS1_NO_REC_FOUND &&
5594 test_bit(DASD_CQR_SUPPRESS_NRF, &req->flags))
5597 dasd_eckd_dump_sense_ccw(device, req, irb);
5601 static int dasd_eckd_pm_freeze(struct dasd_device *device)
5604 * the device should be disconnected from our LCU structure
5605 * on restore we will reconnect it and reread LCU specific
5606 * information like PAV support that might have changed
5608 dasd_alias_remove_device(device);
5609 dasd_alias_disconnect_device_from_lcu(device);
5614 static int dasd_eckd_restore_device(struct dasd_device *device)
5616 struct dasd_eckd_private *private = device->private;
5617 struct dasd_eckd_characteristics temp_rdc_data;
5619 struct dasd_uid temp_uid;
5620 unsigned long flags;
5621 unsigned long cqr_flags = 0;
5623 /* Read Configuration Data */
5624 rc = dasd_eckd_read_conf(device);
5626 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
5627 "Read configuration data failed, rc=%d", rc);
5631 dasd_eckd_get_uid(device, &temp_uid);
5632 /* Generate device unique id */
5633 rc = dasd_eckd_generate_uid(device);
5634 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
5635 if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0)
5636 dev_err(&device->cdev->dev, "The UID of the DASD has "
5638 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
5642 /* register lcu with alias handling, enable PAV if this is a new lcu */
5643 rc = dasd_alias_make_device_known_to_lcu(device);
5647 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags);
5648 dasd_eckd_validate_server(device, cqr_flags);
5650 /* RE-Read Configuration Data */
5651 rc = dasd_eckd_read_conf(device);
5653 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
5654 "Read configuration data failed, rc=%d", rc);
5658 /* Read Feature Codes */
5659 dasd_eckd_read_features(device);
5661 /* Read Volume Information */
5662 dasd_eckd_read_vol_info(device);
5664 /* Read Extent Pool Information */
5665 dasd_eckd_read_ext_pool_info(device);
5667 /* Read Device Characteristics */
5668 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
5669 &temp_rdc_data, 64);
5671 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
5672 "Read device characteristic failed, rc=%d", rc);
5675 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
5676 memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data));
5677 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
5679 /* add device to alias management */
5680 dasd_alias_add_device(device);
5685 dasd_alias_disconnect_device_from_lcu(device);
5690 static int dasd_eckd_reload_device(struct dasd_device *device)
5692 struct dasd_eckd_private *private = device->private;
5695 struct dasd_uid uid;
5696 unsigned long flags;
5699 * remove device from alias handling to prevent new requests
5700 * from being scheduled on the wrong alias device
5702 dasd_alias_remove_device(device);
5704 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
5705 old_base = private->uid.base_unit_addr;
5706 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
5708 /* Read Configuration Data */
5709 rc = dasd_eckd_read_conf(device);
5713 rc = dasd_eckd_generate_uid(device);
5717 * update unit address configuration and
5718 * add device to alias management
5720 dasd_alias_update_add_device(device);
5722 dasd_eckd_get_uid(device, &uid);
5724 if (old_base != uid.base_unit_addr) {
5725 if (strlen(uid.vduit) > 0)
5726 snprintf(print_uid, sizeof(print_uid),
5727 "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial,
5728 uid.ssid, uid.base_unit_addr, uid.vduit);
5730 snprintf(print_uid, sizeof(print_uid),
5731 "%s.%s.%04x.%02x", uid.vendor, uid.serial,
5732 uid.ssid, uid.base_unit_addr);
5734 dev_info(&device->cdev->dev,
5735 "An Alias device was reassigned to a new base device "
5736 "with UID: %s\n", print_uid);
5744 static int dasd_eckd_read_message_buffer(struct dasd_device *device,
5745 struct dasd_rssd_messages *messages,
5748 struct dasd_rssd_messages *message_buf;
5749 struct dasd_psf_prssd_data *prssdp;
5750 struct dasd_ccw_req *cqr;
5754 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
5755 (sizeof(struct dasd_psf_prssd_data) +
5756 sizeof(struct dasd_rssd_messages)),
5759 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
5760 "Could not allocate read message buffer request");
5761 return PTR_ERR(cqr);
5766 cqr->startdev = device;
5767 cqr->memdev = device;
5769 cqr->expires = 10 * HZ;
5770 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags);
5771 /* dasd_sleep_on_immediatly does not do complex error
5772 * recovery so clear erp flag and set retry counter to
5774 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
5777 /* Prepare for Read Subsystem Data */
5778 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
5779 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
5780 prssdp->order = PSF_ORDER_PRSSD;
5781 prssdp->suborder = 0x03; /* Message Buffer */
5782 /* all other bytes of prssdp must be zero */
5785 ccw->cmd_code = DASD_ECKD_CCW_PSF;
5786 ccw->count = sizeof(struct dasd_psf_prssd_data);
5787 ccw->flags |= CCW_FLAG_CC;
5788 ccw->flags |= CCW_FLAG_SLI;
5789 ccw->cda = (__u32)(addr_t) prssdp;
5791 /* Read Subsystem Data - message buffer */
5792 message_buf = (struct dasd_rssd_messages *) (prssdp + 1);
5793 memset(message_buf, 0, sizeof(struct dasd_rssd_messages));
5796 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
5797 ccw->count = sizeof(struct dasd_rssd_messages);
5798 ccw->flags |= CCW_FLAG_SLI;
5799 ccw->cda = (__u32)(addr_t) message_buf;
5801 cqr->buildclk = get_tod_clock();
5802 cqr->status = DASD_CQR_FILLED;
5803 rc = dasd_sleep_on_immediatly(cqr);
5805 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
5806 message_buf = (struct dasd_rssd_messages *)
5808 memcpy(messages, message_buf,
5809 sizeof(struct dasd_rssd_messages));
5810 } else if (cqr->lpm) {
5812 * on z/VM we might not be able to do I/O on the requested path
5813 * but instead we get the required information on any path
5814 * so retry with open path mask
5819 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
5820 "Reading messages failed with rc=%d\n"
5822 dasd_sfree_request(cqr, cqr->memdev);
5826 static int dasd_eckd_query_host_access(struct dasd_device *device,
5827 struct dasd_psf_query_host_access *data)
5829 struct dasd_eckd_private *private = device->private;
5830 struct dasd_psf_query_host_access *host_access;
5831 struct dasd_psf_prssd_data *prssdp;
5832 struct dasd_ccw_req *cqr;
5836 /* not available for HYPER PAV alias devices */
5837 if (!device->block && private->lcu->pav == HYPER_PAV)
5840 /* may not be supported by the storage server */
5841 if (!(private->features.feature[14] & 0x80))
5844 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
5845 sizeof(struct dasd_psf_prssd_data) + 1,
5848 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
5849 "Could not allocate read message buffer request");
5850 return PTR_ERR(cqr);
5852 host_access = kzalloc(sizeof(*host_access), GFP_KERNEL | GFP_DMA);
5854 dasd_sfree_request(cqr, device);
5855 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
5856 "Could not allocate host_access buffer");
5859 cqr->startdev = device;
5860 cqr->memdev = device;
5863 cqr->expires = 10 * HZ;
5865 /* Prepare for Read Subsystem Data */
5866 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
5867 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
5868 prssdp->order = PSF_ORDER_PRSSD;
5869 prssdp->suborder = PSF_SUBORDER_QHA; /* query host access */
5870 /* LSS and Volume that will be queried */
5871 prssdp->lss = private->ned->ID;
5872 prssdp->volume = private->ned->unit_addr;
5873 /* all other bytes of prssdp must be zero */
5876 ccw->cmd_code = DASD_ECKD_CCW_PSF;
5877 ccw->count = sizeof(struct dasd_psf_prssd_data);
5878 ccw->flags |= CCW_FLAG_CC;
5879 ccw->flags |= CCW_FLAG_SLI;
5880 ccw->cda = (__u32)(addr_t) prssdp;
5882 /* Read Subsystem Data - query host access */
5884 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
5885 ccw->count = sizeof(struct dasd_psf_query_host_access);
5886 ccw->flags |= CCW_FLAG_SLI;
5887 ccw->cda = (__u32)(addr_t) host_access;
5889 cqr->buildclk = get_tod_clock();
5890 cqr->status = DASD_CQR_FILLED;
5891 /* the command might not be supported, suppress error message */
5892 __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags);
5893 rc = dasd_sleep_on_interruptible(cqr);
5895 *data = *host_access;
5897 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
5898 "Reading host access data failed with rc=%d\n",
5903 dasd_sfree_request(cqr, cqr->memdev);
5908 * return number of grouped devices
5910 static int dasd_eckd_host_access_count(struct dasd_device *device)
5912 struct dasd_psf_query_host_access *access;
5913 struct dasd_ckd_path_group_entry *entry;
5914 struct dasd_ckd_host_information *info;
5918 access = kzalloc(sizeof(*access), GFP_NOIO);
5920 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
5921 "Could not allocate access buffer");
5924 rc = dasd_eckd_query_host_access(device, access);
5930 info = (struct dasd_ckd_host_information *)
5931 access->host_access_information;
5932 for (i = 0; i < info->entry_count; i++) {
5933 entry = (struct dasd_ckd_path_group_entry *)
5934 (info->entry + i * info->entry_size);
5935 if (entry->status_flags & DASD_ECKD_PG_GROUPED)
5944 * write host access information to a sequential file
5946 static int dasd_hosts_print(struct dasd_device *device, struct seq_file *m)
5948 struct dasd_psf_query_host_access *access;
5949 struct dasd_ckd_path_group_entry *entry;
5950 struct dasd_ckd_host_information *info;
5951 char sysplex[9] = "";
5954 access = kzalloc(sizeof(*access), GFP_NOIO);
5956 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
5957 "Could not allocate access buffer");
5960 rc = dasd_eckd_query_host_access(device, access);
5966 info = (struct dasd_ckd_host_information *)
5967 access->host_access_information;
5968 for (i = 0; i < info->entry_count; i++) {
5969 entry = (struct dasd_ckd_path_group_entry *)
5970 (info->entry + i * info->entry_size);
5972 seq_printf(m, "pgid %*phN\n", 11, entry->pgid);
5974 seq_printf(m, "status_flags %02x\n", entry->status_flags);
5976 memcpy(&sysplex, &entry->sysplex_name, sizeof(sysplex) - 1);
5977 EBCASC(sysplex, sizeof(sysplex));
5978 seq_printf(m, "sysplex_name %8s\n", sysplex);
5979 /* SUPPORTED CYLINDER */
5980 seq_printf(m, "supported_cylinder %d\n", entry->cylinder);
5982 seq_printf(m, "timestamp %lu\n", (unsigned long)
5991 * Perform Subsystem Function - CUIR response
5994 dasd_eckd_psf_cuir_response(struct dasd_device *device, int response,
5995 __u32 message_id, __u8 lpum)
5997 struct dasd_psf_cuir_response *psf_cuir;
5998 int pos = pathmask_to_pos(lpum);
5999 struct dasd_ccw_req *cqr;
6003 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ ,
6004 sizeof(struct dasd_psf_cuir_response),
6008 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
6009 "Could not allocate PSF-CUIR request");
6010 return PTR_ERR(cqr);
6013 psf_cuir = (struct dasd_psf_cuir_response *)cqr->data;
6014 psf_cuir->order = PSF_ORDER_CUIR_RESPONSE;
6015 psf_cuir->cc = response;
6016 psf_cuir->chpid = device->path[pos].chpid;
6017 psf_cuir->message_id = message_id;
6018 psf_cuir->cssid = device->path[pos].cssid;
6019 psf_cuir->ssid = device->path[pos].ssid;
6021 ccw->cmd_code = DASD_ECKD_CCW_PSF;
6022 ccw->cda = (__u32)(addr_t)psf_cuir;
6023 ccw->flags = CCW_FLAG_SLI;
6024 ccw->count = sizeof(struct dasd_psf_cuir_response);
6026 cqr->startdev = device;
6027 cqr->memdev = device;
6030 cqr->expires = 10*HZ;
6031 cqr->buildclk = get_tod_clock();
6032 cqr->status = DASD_CQR_FILLED;
6033 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags);
6035 rc = dasd_sleep_on(cqr);
6037 dasd_sfree_request(cqr, cqr->memdev);
6042 * return configuration data that is referenced by record selector
6043 * if a record selector is specified or per default return the
6044 * conf_data pointer for the path specified by lpum
6046 static struct dasd_conf_data *dasd_eckd_get_ref_conf(struct dasd_device *device,
6048 struct dasd_cuir_message *cuir)
6050 struct dasd_conf_data *conf_data;
6053 if (cuir->record_selector == 0)
6055 for (path = 0x80, pos = 0; path; path >>= 1, pos++) {
6056 conf_data = device->path[pos].conf_data;
6057 if (conf_data->gneq.record_selector ==
6058 cuir->record_selector)
6062 return device->path[pathmask_to_pos(lpum)].conf_data;
6066 * This function determines the scope of a reconfiguration request by
6067 * analysing the path and device selection data provided in the CUIR request.
6068 * Returns a path mask containing CUIR affected paths for the give device.
6070 * If the CUIR request does not contain the required information return the
6071 * path mask of the path the attention message for the CUIR request was reveived
6074 static int dasd_eckd_cuir_scope(struct dasd_device *device, __u8 lpum,
6075 struct dasd_cuir_message *cuir)
6077 struct dasd_conf_data *ref_conf_data;
6078 unsigned long bitmask = 0, mask = 0;
6079 struct dasd_conf_data *conf_data;
6080 unsigned int pos, path;
6081 char *ref_gneq, *gneq;
6082 char *ref_ned, *ned;
6085 /* if CUIR request does not specify the scope use the path
6086 the attention message was presented on */
6087 if (!cuir->ned_map ||
6088 !(cuir->neq_map[0] | cuir->neq_map[1] | cuir->neq_map[2]))
6091 /* get reference conf data */
6092 ref_conf_data = dasd_eckd_get_ref_conf(device, lpum, cuir);
6093 /* reference ned is determined by ned_map field */
6094 pos = 8 - ffs(cuir->ned_map);
6095 ref_ned = (char *)&ref_conf_data->neds[pos];
6096 ref_gneq = (char *)&ref_conf_data->gneq;
6097 /* transfer 24 bit neq_map to mask */
6098 mask = cuir->neq_map[2];
6099 mask |= cuir->neq_map[1] << 8;
6100 mask |= cuir->neq_map[0] << 16;
6102 for (path = 0; path < 8; path++) {
6103 /* initialise data per path */
6105 conf_data = device->path[path].conf_data;
6106 pos = 8 - ffs(cuir->ned_map);
6107 ned = (char *) &conf_data->neds[pos];
6108 /* compare reference ned and per path ned */
6109 if (memcmp(ref_ned, ned, sizeof(*ned)) != 0)
6111 gneq = (char *)&conf_data->gneq;
6112 /* compare reference gneq and per_path gneq under
6113 24 bit mask where mask bit 0 equals byte 7 of
6114 the gneq and mask bit 24 equals byte 31 */
6116 pos = ffs(bitmask) - 1;
6117 if (memcmp(&ref_gneq[31 - pos], &gneq[31 - pos], 1)
6120 clear_bit(pos, &bitmask);
6124 /* device and path match the reference values
6125 add path to CUIR scope */
6126 tbcpm |= 0x80 >> path;
6131 static void dasd_eckd_cuir_notify_user(struct dasd_device *device,
6132 unsigned long paths, int action)
6137 /* get position of bit in mask */
6138 pos = 8 - ffs(paths);
6139 /* get channel path descriptor from this position */
6140 if (action == CUIR_QUIESCE)
6141 pr_warn("Service on the storage server caused path %x.%02x to go offline",
6142 device->path[pos].cssid,
6143 device->path[pos].chpid);
6144 else if (action == CUIR_RESUME)
6145 pr_info("Path %x.%02x is back online after service on the storage server",
6146 device->path[pos].cssid,
6147 device->path[pos].chpid);
6148 clear_bit(7 - pos, &paths);
6152 static int dasd_eckd_cuir_remove_path(struct dasd_device *device, __u8 lpum,
6153 struct dasd_cuir_message *cuir)
6155 unsigned long tbcpm;
6157 tbcpm = dasd_eckd_cuir_scope(device, lpum, cuir);
6158 /* nothing to do if path is not in use */
6159 if (!(dasd_path_get_opm(device) & tbcpm))
6161 if (!(dasd_path_get_opm(device) & ~tbcpm)) {
6162 /* no path would be left if the CUIR action is taken
6166 /* remove device from operational path mask */
6167 dasd_path_remove_opm(device, tbcpm);
6168 dasd_path_add_cuirpm(device, tbcpm);
6173 * walk through all devices and build a path mask to quiesce them
6174 * return an error if the last path to a device would be removed
6176 * if only part of the devices are quiesced and an error
6177 * occurs no onlining necessary, the storage server will
6178 * notify the already set offline devices again
6180 static int dasd_eckd_cuir_quiesce(struct dasd_device *device, __u8 lpum,
6181 struct dasd_cuir_message *cuir)
6183 struct dasd_eckd_private *private = device->private;
6184 struct alias_pav_group *pavgroup, *tempgroup;
6185 struct dasd_device *dev, *n;
6186 unsigned long paths = 0;
6187 unsigned long flags;
6190 /* active devices */
6191 list_for_each_entry_safe(dev, n, &private->lcu->active_devices,
6193 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
6194 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
6195 spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags);
6200 /* inactive devices */
6201 list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices,
6203 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
6204 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
6205 spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags);
6210 /* devices in PAV groups */
6211 list_for_each_entry_safe(pavgroup, tempgroup,
6212 &private->lcu->grouplist, group) {
6213 list_for_each_entry_safe(dev, n, &pavgroup->baselist,
6215 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
6216 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
6217 spin_unlock_irqrestore(
6218 get_ccwdev_lock(dev->cdev), flags);
6223 list_for_each_entry_safe(dev, n, &pavgroup->aliaslist,
6225 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
6226 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
6227 spin_unlock_irqrestore(
6228 get_ccwdev_lock(dev->cdev), flags);
6234 /* notify user about all paths affected by CUIR action */
6235 dasd_eckd_cuir_notify_user(device, paths, CUIR_QUIESCE);
6241 static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum,
6242 struct dasd_cuir_message *cuir)
6244 struct dasd_eckd_private *private = device->private;
6245 struct alias_pav_group *pavgroup, *tempgroup;
6246 struct dasd_device *dev, *n;
6247 unsigned long paths = 0;
6251 * the path may have been added through a generic path event before
6252 * only trigger path verification if the path is not already in use
6254 list_for_each_entry_safe(dev, n,
6255 &private->lcu->active_devices,
6257 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
6259 if (!(dasd_path_get_opm(dev) & tbcpm)) {
6260 dasd_path_add_tbvpm(dev, tbcpm);
6261 dasd_schedule_device_bh(dev);
6264 list_for_each_entry_safe(dev, n,
6265 &private->lcu->inactive_devices,
6267 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
6269 if (!(dasd_path_get_opm(dev) & tbcpm)) {
6270 dasd_path_add_tbvpm(dev, tbcpm);
6271 dasd_schedule_device_bh(dev);
6274 /* devices in PAV groups */
6275 list_for_each_entry_safe(pavgroup, tempgroup,
6276 &private->lcu->grouplist,
6278 list_for_each_entry_safe(dev, n,
6279 &pavgroup->baselist,
6281 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
6283 if (!(dasd_path_get_opm(dev) & tbcpm)) {
6284 dasd_path_add_tbvpm(dev, tbcpm);
6285 dasd_schedule_device_bh(dev);
6288 list_for_each_entry_safe(dev, n,
6289 &pavgroup->aliaslist,
6291 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
6293 if (!(dasd_path_get_opm(dev) & tbcpm)) {
6294 dasd_path_add_tbvpm(dev, tbcpm);
6295 dasd_schedule_device_bh(dev);
6299 /* notify user about all paths affected by CUIR action */
6300 dasd_eckd_cuir_notify_user(device, paths, CUIR_RESUME);
6304 static void dasd_eckd_handle_cuir(struct dasd_device *device, void *messages,
6307 struct dasd_cuir_message *cuir = messages;
6310 DBF_DEV_EVENT(DBF_WARNING, device,
6311 "CUIR request: %016llx %016llx %016llx %08x",
6312 ((u64 *)cuir)[0], ((u64 *)cuir)[1], ((u64 *)cuir)[2],
6315 if (cuir->code == CUIR_QUIESCE) {
6317 if (dasd_eckd_cuir_quiesce(device, lpum, cuir))
6318 response = PSF_CUIR_LAST_PATH;
6320 response = PSF_CUIR_COMPLETED;
6321 } else if (cuir->code == CUIR_RESUME) {
6323 dasd_eckd_cuir_resume(device, lpum, cuir);
6324 response = PSF_CUIR_COMPLETED;
6326 response = PSF_CUIR_NOT_SUPPORTED;
6328 dasd_eckd_psf_cuir_response(device, response,
6329 cuir->message_id, lpum);
6330 DBF_DEV_EVENT(DBF_WARNING, device,
6331 "CUIR response: %d on message ID %08x", response,
6333 /* to make sure there is no attention left schedule work again */
6334 device->discipline->check_attention(device, lpum);
6337 static void dasd_eckd_oos_resume(struct dasd_device *device)
6339 struct dasd_eckd_private *private = device->private;
6340 struct alias_pav_group *pavgroup, *tempgroup;
6341 struct dasd_device *dev, *n;
6342 unsigned long flags;
6344 spin_lock_irqsave(&private->lcu->lock, flags);
6345 list_for_each_entry_safe(dev, n, &private->lcu->active_devices,
6347 if (dev->stopped & DASD_STOPPED_NOSPC)
6348 dasd_generic_space_avail(dev);
6350 list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices,
6352 if (dev->stopped & DASD_STOPPED_NOSPC)
6353 dasd_generic_space_avail(dev);
6355 /* devices in PAV groups */
6356 list_for_each_entry_safe(pavgroup, tempgroup,
6357 &private->lcu->grouplist,
6359 list_for_each_entry_safe(dev, n, &pavgroup->baselist,
6361 if (dev->stopped & DASD_STOPPED_NOSPC)
6362 dasd_generic_space_avail(dev);
6364 list_for_each_entry_safe(dev, n, &pavgroup->aliaslist,
6366 if (dev->stopped & DASD_STOPPED_NOSPC)
6367 dasd_generic_space_avail(dev);
6370 spin_unlock_irqrestore(&private->lcu->lock, flags);
6373 static void dasd_eckd_handle_oos(struct dasd_device *device, void *messages,
6376 struct dasd_oos_message *oos = messages;
6378 switch (oos->code) {
6381 dev_warn(&device->cdev->dev,
6382 "Extent pool usage has reached a critical value\n");
6383 dasd_eckd_oos_resume(device);
6387 dev_warn(&device->cdev->dev,
6388 "Extent pool is exhausted\n");
6392 dev_info(&device->cdev->dev,
6393 "Extent pool physical space constraint has been relieved\n");
6397 /* In any case, update related data */
6398 dasd_eckd_read_ext_pool_info(device);
6400 /* to make sure there is no attention left schedule work again */
6401 device->discipline->check_attention(device, lpum);
6404 static void dasd_eckd_check_attention_work(struct work_struct *work)
6406 struct check_attention_work_data *data;
6407 struct dasd_rssd_messages *messages;
6408 struct dasd_device *device;
6411 data = container_of(work, struct check_attention_work_data, worker);
6412 device = data->device;
6413 messages = kzalloc(sizeof(*messages), GFP_KERNEL);
6415 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
6416 "Could not allocate attention message buffer");
6419 rc = dasd_eckd_read_message_buffer(device, messages, data->lpum);
6423 if (messages->length == ATTENTION_LENGTH_CUIR &&
6424 messages->format == ATTENTION_FORMAT_CUIR)
6425 dasd_eckd_handle_cuir(device, messages, data->lpum);
6426 if (messages->length == ATTENTION_LENGTH_OOS &&
6427 messages->format == ATTENTION_FORMAT_OOS)
6428 dasd_eckd_handle_oos(device, messages, data->lpum);
6431 dasd_put_device(device);
6436 static int dasd_eckd_check_attention(struct dasd_device *device, __u8 lpum)
6438 struct check_attention_work_data *data;
6440 data = kzalloc(sizeof(*data), GFP_ATOMIC);
6443 INIT_WORK(&data->worker, dasd_eckd_check_attention_work);
6444 dasd_get_device(device);
6445 data->device = device;
6447 schedule_work(&data->worker);
6451 static int dasd_eckd_disable_hpf_path(struct dasd_device *device, __u8 lpum)
6453 if (~lpum & dasd_path_get_opm(device)) {
6454 dasd_path_add_nohpfpm(device, lpum);
6455 dasd_path_remove_opm(device, lpum);
6456 dev_err(&device->cdev->dev,
6457 "Channel path %02X lost HPF functionality and is disabled\n",
6464 static void dasd_eckd_disable_hpf_device(struct dasd_device *device)
6466 struct dasd_eckd_private *private = device->private;
6468 dev_err(&device->cdev->dev,
6469 "High Performance FICON disabled\n");
6470 private->fcx_max_data = 0;
6473 static int dasd_eckd_hpf_enabled(struct dasd_device *device)
6475 struct dasd_eckd_private *private = device->private;
6477 return private->fcx_max_data ? 1 : 0;
6480 static void dasd_eckd_handle_hpf_error(struct dasd_device *device,
6483 struct dasd_eckd_private *private = device->private;
6485 if (!private->fcx_max_data) {
6486 /* sanity check for no HPF, the error makes no sense */
6487 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
6488 "Trying to disable HPF for a non HPF device");
6491 if (irb->scsw.tm.sesq == SCSW_SESQ_DEV_NOFCX) {
6492 dasd_eckd_disable_hpf_device(device);
6493 } else if (irb->scsw.tm.sesq == SCSW_SESQ_PATH_NOFCX) {
6494 if (dasd_eckd_disable_hpf_path(device, irb->esw.esw1.lpum))
6496 dasd_eckd_disable_hpf_device(device);
6497 dasd_path_set_tbvpm(device,
6498 dasd_path_get_hpfpm(device));
6501 * prevent that any new I/O ist started on the device and schedule a
6502 * requeue of existing requests
6504 dasd_device_set_stop_bits(device, DASD_STOPPED_NOT_ACC);
6505 dasd_schedule_requeue(device);
6509 * Initialize block layer request queue.
6511 static void dasd_eckd_setup_blk_queue(struct dasd_block *block)
6513 unsigned int logical_block_size = block->bp_block;
6514 struct request_queue *q = block->request_queue;
6515 struct dasd_device *device = block->base;
6516 struct dasd_eckd_private *private;
6517 unsigned int max_discard_sectors;
6518 unsigned int max_bytes;
6519 unsigned int ext_bytes; /* Extent Size in Bytes */
6523 int ext_size; /* Extent Size in Cylinders */
6526 private = device->private;
6527 trks_per_cyl = private->rdc_data.trk_per_cyl;
6528 recs_per_trk = recs_per_track(&private->rdc_data, 0, logical_block_size);
6530 if (device->features & DASD_FEATURE_USERAW) {
6532 * the max_blocks value for raw_track access is 256
6533 * it is higher than the native ECKD value because we
6534 * only need one ccw per track
6535 * so the max_hw_sectors are
6536 * 2048 x 512B = 1024kB = 16 tracks
6538 max = DASD_ECKD_MAX_BLOCKS_RAW << block->s2b_shift;
6540 max = DASD_ECKD_MAX_BLOCKS << block->s2b_shift;
6542 blk_queue_flag_set(QUEUE_FLAG_NONROT, q);
6543 q->limits.max_dev_sectors = max;
6544 blk_queue_logical_block_size(q, logical_block_size);
6545 blk_queue_max_hw_sectors(q, max);
6546 blk_queue_max_segments(q, USHRT_MAX);
6547 /* With page sized segments each segment can be translated into one idaw/tidaw */
6548 blk_queue_max_segment_size(q, PAGE_SIZE);
6549 blk_queue_segment_boundary(q, PAGE_SIZE - 1);
6551 if (dasd_eckd_is_ese(device)) {
6553 * Depending on the extent size, up to UINT_MAX bytes can be
6554 * accepted. However, neither DASD_ECKD_RAS_EXTS_MAX nor the
6555 * device limits should be exceeded.
6557 ext_size = dasd_eckd_ext_size(device);
6558 ext_limit = min(private->real_cyl / ext_size, DASD_ECKD_RAS_EXTS_MAX);
6559 ext_bytes = ext_size * trks_per_cyl * recs_per_trk *
6561 max_bytes = UINT_MAX - (UINT_MAX % ext_bytes);
6562 if (max_bytes / ext_bytes > ext_limit)
6563 max_bytes = ext_bytes * ext_limit;
6565 max_discard_sectors = max_bytes / 512;
6567 blk_queue_max_discard_sectors(q, max_discard_sectors);
6568 blk_queue_flag_set(QUEUE_FLAG_DISCARD, q);
6569 q->limits.discard_granularity = ext_bytes;
6570 q->limits.discard_alignment = ext_bytes;
6574 static struct ccw_driver dasd_eckd_driver = {
6576 .name = "dasd-eckd",
6577 .owner = THIS_MODULE,
6579 .ids = dasd_eckd_ids,
6580 .probe = dasd_eckd_probe,
6581 .remove = dasd_generic_remove,
6582 .set_offline = dasd_generic_set_offline,
6583 .set_online = dasd_eckd_set_online,
6584 .notify = dasd_generic_notify,
6585 .path_event = dasd_generic_path_event,
6586 .shutdown = dasd_generic_shutdown,
6587 .freeze = dasd_generic_pm_freeze,
6588 .thaw = dasd_generic_restore_device,
6589 .restore = dasd_generic_restore_device,
6590 .uc_handler = dasd_generic_uc_handler,
6591 .int_class = IRQIO_DAS,
6594 static struct dasd_discipline dasd_eckd_discipline = {
6595 .owner = THIS_MODULE,
6598 .check_device = dasd_eckd_check_characteristics,
6599 .uncheck_device = dasd_eckd_uncheck_device,
6600 .do_analysis = dasd_eckd_do_analysis,
6601 .verify_path = dasd_eckd_verify_path,
6602 .basic_to_ready = dasd_eckd_basic_to_ready,
6603 .online_to_ready = dasd_eckd_online_to_ready,
6604 .basic_to_known = dasd_eckd_basic_to_known,
6605 .setup_blk_queue = dasd_eckd_setup_blk_queue,
6606 .fill_geometry = dasd_eckd_fill_geometry,
6607 .start_IO = dasd_start_IO,
6608 .term_IO = dasd_term_IO,
6609 .handle_terminated_request = dasd_eckd_handle_terminated_request,
6610 .format_device = dasd_eckd_format_device,
6611 .check_device_format = dasd_eckd_check_device_format,
6612 .erp_action = dasd_eckd_erp_action,
6613 .erp_postaction = dasd_eckd_erp_postaction,
6614 .check_for_device_change = dasd_eckd_check_for_device_change,
6615 .build_cp = dasd_eckd_build_alias_cp,
6616 .free_cp = dasd_eckd_free_alias_cp,
6617 .dump_sense = dasd_eckd_dump_sense,
6618 .dump_sense_dbf = dasd_eckd_dump_sense_dbf,
6619 .fill_info = dasd_eckd_fill_info,
6620 .ioctl = dasd_eckd_ioctl,
6621 .freeze = dasd_eckd_pm_freeze,
6622 .restore = dasd_eckd_restore_device,
6623 .reload = dasd_eckd_reload_device,
6624 .get_uid = dasd_eckd_get_uid,
6625 .kick_validate = dasd_eckd_kick_validate_server,
6626 .check_attention = dasd_eckd_check_attention,
6627 .host_access_count = dasd_eckd_host_access_count,
6628 .hosts_print = dasd_hosts_print,
6629 .handle_hpf_error = dasd_eckd_handle_hpf_error,
6630 .disable_hpf = dasd_eckd_disable_hpf_device,
6631 .hpf_enabled = dasd_eckd_hpf_enabled,
6632 .reset_path = dasd_eckd_reset_path,
6633 .is_ese = dasd_eckd_is_ese,
6634 .space_allocated = dasd_eckd_space_allocated,
6635 .space_configured = dasd_eckd_space_configured,
6636 .logical_capacity = dasd_eckd_logical_capacity,
6637 .release_space = dasd_eckd_release_space,
6638 .ext_pool_id = dasd_eckd_ext_pool_id,
6639 .ext_size = dasd_eckd_ext_size,
6640 .ext_pool_cap_at_warnlevel = dasd_eckd_ext_pool_cap_at_warnlevel,
6641 .ext_pool_warn_thrshld = dasd_eckd_ext_pool_warn_thrshld,
6642 .ext_pool_oos = dasd_eckd_ext_pool_oos,
6643 .ext_pool_exhaust = dasd_eckd_ext_pool_exhaust,
6644 .ese_format = dasd_eckd_ese_format,
6645 .ese_read = dasd_eckd_ese_read,
6649 dasd_eckd_init(void)
6653 ASCEBC(dasd_eckd_discipline.ebcname, 4);
6654 dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req),
6655 GFP_KERNEL | GFP_DMA);
6656 if (!dasd_reserve_req)
6658 dasd_vol_info_req = kmalloc(sizeof(*dasd_vol_info_req),
6659 GFP_KERNEL | GFP_DMA);
6660 if (!dasd_vol_info_req)
6662 path_verification_worker = kmalloc(sizeof(*path_verification_worker),
6663 GFP_KERNEL | GFP_DMA);
6664 if (!path_verification_worker) {
6665 kfree(dasd_reserve_req);
6666 kfree(dasd_vol_info_req);
6669 rawpadpage = (void *)__get_free_page(GFP_KERNEL);
6671 kfree(path_verification_worker);
6672 kfree(dasd_reserve_req);
6673 kfree(dasd_vol_info_req);
6676 ret = ccw_driver_register(&dasd_eckd_driver);
6678 wait_for_device_probe();
6680 kfree(path_verification_worker);
6681 kfree(dasd_reserve_req);
6682 kfree(dasd_vol_info_req);
6683 free_page((unsigned long)rawpadpage);
6689 dasd_eckd_cleanup(void)
6691 ccw_driver_unregister(&dasd_eckd_driver);
6692 kfree(path_verification_worker);
6693 kfree(dasd_reserve_req);
6694 free_page((unsigned long)rawpadpage);
6697 module_init(dasd_eckd_init);
6698 module_exit(dasd_eckd_cleanup);