2 * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
3 * Horst Hummel <Horst.Hummel@de.ibm.com>
4 * Carsten Otte <Cotte@de.ibm.com>
5 * Martin Schwidefsky <schwidefsky@de.ibm.com>
6 * Bugreports.to..: <Linux390@de.ibm.com>
7 * Copyright IBM Corp. 1999, 2009
8 * EMC Symmetrix ioctl Copyright EMC Corporation, 2008
9 * Author.........: Nigel Hislop <hislop_nigel@emc.com>
12 #define KMSG_COMPONENT "dasd-eckd"
14 #include <linux/stddef.h>
15 #include <linux/kernel.h>
16 #include <linux/slab.h>
17 #include <linux/hdreg.h> /* HDIO_GETGEO */
18 #include <linux/bio.h>
19 #include <linux/module.h>
20 #include <linux/compat.h>
21 #include <linux/init.h>
22 #include <linux/seq_file.h>
24 #include <asm/css_chars.h>
25 #include <asm/debug.h>
26 #include <asm/idals.h>
27 #include <asm/ebcdic.h>
29 #include <linux/uaccess.h>
31 #include <asm/ccwdev.h>
33 #include <asm/schid.h>
34 #include <asm/chpid.h>
37 #include "dasd_eckd.h"
41 #endif /* PRINTK_HEADER */
42 #define PRINTK_HEADER "dasd(eckd):"
44 #define ECKD_C0(i) (i->home_bytes)
45 #define ECKD_F(i) (i->formula)
46 #define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\
47 (i->factors.f_0x02.f1))
48 #define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\
49 (i->factors.f_0x02.f2))
50 #define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\
51 (i->factors.f_0x02.f3))
52 #define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0)
53 #define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0)
54 #define ECKD_F6(i) (i->factor6)
55 #define ECKD_F7(i) (i->factor7)
56 #define ECKD_F8(i) (i->factor8)
59 * raw track access always map to 64k in memory
60 * so it maps to 16 blocks of 4k per track
62 #define DASD_RAW_BLOCK_PER_TRACK 16
63 #define DASD_RAW_BLOCKSIZE 4096
64 /* 64k are 128 x 512 byte sectors */
65 #define DASD_RAW_SECTORS_PER_TRACK 128
67 MODULE_LICENSE("GPL");
69 static struct dasd_discipline dasd_eckd_discipline;
71 /* The ccw bus type uses this table to find devices that it sends to
73 static struct ccw_device_id dasd_eckd_ids[] = {
74 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1},
75 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2},
76 { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3380, 0), .driver_info = 0x3},
77 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4},
78 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5},
79 { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6},
80 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7},
81 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8},
82 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9},
83 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa},
84 { /* end of list */ },
87 MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids);
89 static struct ccw_driver dasd_eckd_driver; /* see below */
91 static void *rawpadpage;
94 #define INIT_CQR_UNFORMATTED 1
95 #define INIT_CQR_ERROR 2
97 /* emergency request for reserve/release */
99 struct dasd_ccw_req cqr;
103 static DEFINE_MUTEX(dasd_reserve_mutex);
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 prepare_itcw(struct itcw *, unsigned int, unsigned int, int,
125 struct dasd_device *, struct dasd_device *,
126 unsigned int, int, unsigned int, unsigned int,
127 unsigned int, unsigned int);
129 /* initial attempt at a probe function. this can be simplified once
130 * the other detection code is gone */
132 dasd_eckd_probe (struct ccw_device *cdev)
136 /* set ECKD specific ccw-device options */
137 ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE |
138 CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH);
140 DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s",
141 "dasd_eckd_probe: could not set "
142 "ccw-device options");
145 ret = dasd_generic_probe(cdev, &dasd_eckd_discipline);
150 dasd_eckd_set_online(struct ccw_device *cdev)
152 return dasd_generic_set_online(cdev, &dasd_eckd_discipline);
155 static const int sizes_trk0[] = { 28, 148, 84 };
156 #define LABEL_SIZE 140
158 /* head and record addresses of count_area read in analysis ccw */
159 static const int count_area_head[] = { 0, 0, 0, 0, 2 };
160 static const int count_area_rec[] = { 1, 2, 3, 4, 1 };
162 static inline unsigned int
163 round_up_multiple(unsigned int no, unsigned int mult)
166 return (rem ? no - rem + mult : no);
169 static inline unsigned int
170 ceil_quot(unsigned int d1, unsigned int d2)
172 return (d1 + (d2 - 1)) / d2;
176 recs_per_track(struct dasd_eckd_characteristics * rdc,
177 unsigned int kl, unsigned int dl)
181 switch (rdc->dev_type) {
184 return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) +
185 ceil_quot(dl + 12, 32));
187 return 1499 / (15 + ceil_quot(dl + 12, 32));
189 dn = ceil_quot(dl + 6, 232) + 1;
191 kn = ceil_quot(kl + 6, 232) + 1;
192 return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) +
193 9 + ceil_quot(dl + 6 * dn, 34));
195 return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34));
197 dn = ceil_quot(dl + 6, 232) + 1;
199 kn = ceil_quot(kl + 6, 232) + 1;
200 return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) +
201 ceil_quot(dl + 6 * dn, 34));
203 return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34));
208 static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head)
210 geo->cyl = (__u16) cyl;
211 geo->head = cyl >> 16;
216 static int check_XRC(struct ccw1 *ccw, struct DE_eckd_data *data,
217 struct dasd_device *device)
219 struct dasd_eckd_private *private = device->private;
222 if (!private->rdc_data.facilities.XRC_supported)
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' */
229 rc = get_phys_clock(&data->ep_sys_time);
230 /* Ignore return code if sync clock is switched off. */
231 if (rc == -EOPNOTSUPP || rc == -EACCES)
235 ccw->count = sizeof(struct DE_eckd_data);
236 ccw->flags |= CCW_FLAG_SLI;
243 define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk,
244 unsigned int totrk, int cmd, struct dasd_device *device,
247 struct dasd_eckd_private *private = device->private;
248 u16 heads, beghead, endhead;
253 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT;
256 ccw->cda = (__u32)__pa(data);
259 memset(data, 0, sizeof(struct DE_eckd_data));
261 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
262 case DASD_ECKD_CCW_READ_RECORD_ZERO:
263 case DASD_ECKD_CCW_READ:
264 case DASD_ECKD_CCW_READ_MT:
265 case DASD_ECKD_CCW_READ_CKD:
266 case DASD_ECKD_CCW_READ_CKD_MT:
267 case DASD_ECKD_CCW_READ_KD:
268 case DASD_ECKD_CCW_READ_KD_MT:
269 data->mask.perm = 0x1;
270 data->attributes.operation = private->attrib.operation;
272 case DASD_ECKD_CCW_READ_COUNT:
273 data->mask.perm = 0x1;
274 data->attributes.operation = DASD_BYPASS_CACHE;
276 case DASD_ECKD_CCW_READ_TRACK:
277 case DASD_ECKD_CCW_READ_TRACK_DATA:
278 data->mask.perm = 0x1;
279 data->attributes.operation = private->attrib.operation;
282 case DASD_ECKD_CCW_WRITE:
283 case DASD_ECKD_CCW_WRITE_MT:
284 case DASD_ECKD_CCW_WRITE_KD:
285 case DASD_ECKD_CCW_WRITE_KD_MT:
286 data->mask.perm = 0x02;
287 data->attributes.operation = private->attrib.operation;
288 rc = check_XRC(ccw, data, device);
290 case DASD_ECKD_CCW_WRITE_CKD:
291 case DASD_ECKD_CCW_WRITE_CKD_MT:
292 data->attributes.operation = DASD_BYPASS_CACHE;
293 rc = check_XRC(ccw, data, device);
295 case DASD_ECKD_CCW_ERASE:
296 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
297 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
298 data->mask.perm = 0x3;
299 data->mask.auth = 0x1;
300 data->attributes.operation = DASD_BYPASS_CACHE;
301 rc = check_XRC(ccw, data, device);
303 case DASD_ECKD_CCW_WRITE_FULL_TRACK:
304 data->mask.perm = 0x03;
305 data->attributes.operation = private->attrib.operation;
308 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
309 data->mask.perm = 0x02;
310 data->attributes.operation = private->attrib.operation;
311 data->blk_size = blksize;
312 rc = check_XRC(ccw, data, device);
315 dev_err(&device->cdev->dev,
316 "0x%x is not a known command\n", cmd);
320 data->attributes.mode = 0x3; /* ECKD */
322 if ((private->rdc_data.cu_type == 0x2105 ||
323 private->rdc_data.cu_type == 0x2107 ||
324 private->rdc_data.cu_type == 0x1750)
325 && !(private->uses_cdl && trk < 2))
326 data->ga_extended |= 0x40; /* Regular Data Format Mode */
328 heads = private->rdc_data.trk_per_cyl;
329 begcyl = trk / heads;
330 beghead = trk % heads;
331 endcyl = totrk / heads;
332 endhead = totrk % heads;
334 /* check for sequential prestage - enhance cylinder range */
335 if (data->attributes.operation == DASD_SEQ_PRESTAGE ||
336 data->attributes.operation == DASD_SEQ_ACCESS) {
338 if (endcyl + private->attrib.nr_cyl < private->real_cyl)
339 endcyl += private->attrib.nr_cyl;
341 endcyl = (private->real_cyl - 1);
344 set_ch_t(&data->beg_ext, begcyl, beghead);
345 set_ch_t(&data->end_ext, endcyl, endhead);
350 static void locate_record_ext(struct ccw1 *ccw, struct LRE_eckd_data *data,
351 unsigned int trk, unsigned int rec_on_trk,
352 int count, int cmd, struct dasd_device *device,
353 unsigned int reclen, unsigned int tlf)
355 struct dasd_eckd_private *private = device->private;
360 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD_EXT;
362 if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK)
366 ccw->cda = (__u32)__pa(data);
369 memset(data, 0, sizeof(*data));
372 switch (private->rdc_data.dev_type) {
374 dn = ceil_quot(reclen + 6, 232);
375 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
376 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
379 d = 7 + ceil_quot(reclen + 12, 32);
380 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
384 data->sector = sector;
385 /* note: meaning of count depends on the operation
386 * for record based I/O it's the number of records, but for
387 * track based I/O it's the number of tracks
391 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
392 data->operation.orientation = 0x3;
393 data->operation.operation = 0x03;
395 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
396 data->operation.orientation = 0x3;
397 data->operation.operation = 0x16;
399 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
400 data->operation.orientation = 0x1;
401 data->operation.operation = 0x03;
404 case DASD_ECKD_CCW_READ_RECORD_ZERO:
405 data->operation.orientation = 0x3;
406 data->operation.operation = 0x16;
409 case DASD_ECKD_CCW_WRITE:
410 case DASD_ECKD_CCW_WRITE_MT:
411 case DASD_ECKD_CCW_WRITE_KD:
412 case DASD_ECKD_CCW_WRITE_KD_MT:
413 data->auxiliary.length_valid = 0x1;
414 data->length = reclen;
415 data->operation.operation = 0x01;
417 case DASD_ECKD_CCW_WRITE_CKD:
418 case DASD_ECKD_CCW_WRITE_CKD_MT:
419 data->auxiliary.length_valid = 0x1;
420 data->length = reclen;
421 data->operation.operation = 0x03;
423 case DASD_ECKD_CCW_WRITE_FULL_TRACK:
424 data->operation.orientation = 0x0;
425 data->operation.operation = 0x3F;
426 data->extended_operation = 0x11;
428 data->extended_parameter_length = 0x02;
429 if (data->count > 8) {
430 data->extended_parameter[0] = 0xFF;
431 data->extended_parameter[1] = 0xFF;
432 data->extended_parameter[1] <<= (16 - count);
434 data->extended_parameter[0] = 0xFF;
435 data->extended_parameter[0] <<= (8 - count);
436 data->extended_parameter[1] = 0x00;
440 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
441 data->auxiliary.length_valid = 0x1;
442 data->length = reclen; /* not tlf, as one might think */
443 data->operation.operation = 0x3F;
444 data->extended_operation = 0x23;
446 case DASD_ECKD_CCW_READ:
447 case DASD_ECKD_CCW_READ_MT:
448 case DASD_ECKD_CCW_READ_KD:
449 case DASD_ECKD_CCW_READ_KD_MT:
450 data->auxiliary.length_valid = 0x1;
451 data->length = reclen;
452 data->operation.operation = 0x06;
454 case DASD_ECKD_CCW_READ_CKD:
455 case DASD_ECKD_CCW_READ_CKD_MT:
456 data->auxiliary.length_valid = 0x1;
457 data->length = reclen;
458 data->operation.operation = 0x16;
460 case DASD_ECKD_CCW_READ_COUNT:
461 data->operation.operation = 0x06;
463 case DASD_ECKD_CCW_READ_TRACK:
464 data->operation.orientation = 0x1;
465 data->operation.operation = 0x0C;
466 data->extended_parameter_length = 0;
469 case DASD_ECKD_CCW_READ_TRACK_DATA:
470 data->auxiliary.length_valid = 0x1;
472 data->operation.operation = 0x0C;
474 case DASD_ECKD_CCW_ERASE:
475 data->length = reclen;
476 data->auxiliary.length_valid = 0x1;
477 data->operation.operation = 0x0b;
480 DBF_DEV_EVENT(DBF_ERR, device,
481 "fill LRE unknown opcode 0x%x", cmd);
484 set_ch_t(&data->seek_addr,
485 trk / private->rdc_data.trk_per_cyl,
486 trk % private->rdc_data.trk_per_cyl);
487 data->search_arg.cyl = data->seek_addr.cyl;
488 data->search_arg.head = data->seek_addr.head;
489 data->search_arg.record = rec_on_trk;
492 static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
493 unsigned int trk, unsigned int totrk, int cmd,
494 struct dasd_device *basedev, struct dasd_device *startdev,
495 unsigned int format, unsigned int rec_on_trk, int count,
496 unsigned int blksize, unsigned int tlf)
498 struct dasd_eckd_private *basepriv, *startpriv;
499 struct LRE_eckd_data *lredata;
500 struct DE_eckd_data *dedata;
503 basepriv = basedev->private;
504 startpriv = startdev->private;
505 dedata = &pfxdata->define_extent;
506 lredata = &pfxdata->locate_record;
508 ccw->cmd_code = DASD_ECKD_CCW_PFX;
510 if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) {
511 ccw->count = sizeof(*pfxdata) + 2;
512 ccw->cda = (__u32) __pa(pfxdata);
513 memset(pfxdata, 0, sizeof(*pfxdata) + 2);
515 ccw->count = sizeof(*pfxdata);
516 ccw->cda = (__u32) __pa(pfxdata);
517 memset(pfxdata, 0, sizeof(*pfxdata));
522 DBF_DEV_EVENT(DBF_ERR, basedev,
523 "PFX LRE unknown format 0x%x", format);
527 pfxdata->format = format;
528 pfxdata->base_address = basepriv->ned->unit_addr;
529 pfxdata->base_lss = basepriv->ned->ID;
530 pfxdata->validity.define_extent = 1;
532 /* private uid is kept up to date, conf_data may be outdated */
533 if (startpriv->uid.type == UA_BASE_PAV_ALIAS)
534 pfxdata->validity.verify_base = 1;
536 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) {
537 pfxdata->validity.verify_base = 1;
538 pfxdata->validity.hyper_pav = 1;
541 rc = define_extent(NULL, dedata, trk, totrk, cmd, basedev, blksize);
544 * For some commands the System Time Stamp is set in the define extent
545 * data when XRC is supported. The validity of the time stamp must be
546 * reflected in the prefix data as well.
548 if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02)
549 pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */
552 locate_record_ext(NULL, lredata, trk, rec_on_trk, count, cmd,
553 basedev, blksize, tlf);
559 static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
560 unsigned int trk, unsigned int totrk, int cmd,
561 struct dasd_device *basedev, struct dasd_device *startdev)
563 return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev,
568 locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk,
569 unsigned int rec_on_trk, int no_rec, int cmd,
570 struct dasd_device * device, int reclen)
572 struct dasd_eckd_private *private = device->private;
576 DBF_DEV_EVENT(DBF_INFO, device,
577 "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d",
578 trk, rec_on_trk, no_rec, cmd, reclen);
580 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD;
583 ccw->cda = (__u32) __pa(data);
585 memset(data, 0, sizeof(struct LO_eckd_data));
588 switch (private->rdc_data.dev_type) {
590 dn = ceil_quot(reclen + 6, 232);
591 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
592 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
595 d = 7 + ceil_quot(reclen + 12, 32);
596 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
600 data->sector = sector;
601 data->count = no_rec;
603 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
604 data->operation.orientation = 0x3;
605 data->operation.operation = 0x03;
607 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
608 data->operation.orientation = 0x3;
609 data->operation.operation = 0x16;
611 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
612 data->operation.orientation = 0x1;
613 data->operation.operation = 0x03;
616 case DASD_ECKD_CCW_READ_RECORD_ZERO:
617 data->operation.orientation = 0x3;
618 data->operation.operation = 0x16;
621 case DASD_ECKD_CCW_WRITE:
622 case DASD_ECKD_CCW_WRITE_MT:
623 case DASD_ECKD_CCW_WRITE_KD:
624 case DASD_ECKD_CCW_WRITE_KD_MT:
625 data->auxiliary.last_bytes_used = 0x1;
626 data->length = reclen;
627 data->operation.operation = 0x01;
629 case DASD_ECKD_CCW_WRITE_CKD:
630 case DASD_ECKD_CCW_WRITE_CKD_MT:
631 data->auxiliary.last_bytes_used = 0x1;
632 data->length = reclen;
633 data->operation.operation = 0x03;
635 case DASD_ECKD_CCW_READ:
636 case DASD_ECKD_CCW_READ_MT:
637 case DASD_ECKD_CCW_READ_KD:
638 case DASD_ECKD_CCW_READ_KD_MT:
639 data->auxiliary.last_bytes_used = 0x1;
640 data->length = reclen;
641 data->operation.operation = 0x06;
643 case DASD_ECKD_CCW_READ_CKD:
644 case DASD_ECKD_CCW_READ_CKD_MT:
645 data->auxiliary.last_bytes_used = 0x1;
646 data->length = reclen;
647 data->operation.operation = 0x16;
649 case DASD_ECKD_CCW_READ_COUNT:
650 data->operation.operation = 0x06;
652 case DASD_ECKD_CCW_ERASE:
653 data->length = reclen;
654 data->auxiliary.last_bytes_used = 0x1;
655 data->operation.operation = 0x0b;
658 DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record "
661 set_ch_t(&data->seek_addr,
662 trk / private->rdc_data.trk_per_cyl,
663 trk % private->rdc_data.trk_per_cyl);
664 data->search_arg.cyl = data->seek_addr.cyl;
665 data->search_arg.head = data->seek_addr.head;
666 data->search_arg.record = rec_on_trk;
670 * Returns 1 if the block is one of the special blocks that needs
671 * to get read/written with the KD variant of the command.
672 * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and
673 * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT.
674 * Luckily the KD variants differ only by one bit (0x08) from the
675 * normal variant. So don't wonder about code like:
676 * if (dasd_eckd_cdl_special(blk_per_trk, recid))
677 * ccw->cmd_code |= 0x8;
680 dasd_eckd_cdl_special(int blk_per_trk, int recid)
684 if (recid < blk_per_trk)
686 if (recid < 2 * blk_per_trk)
692 * Returns the record size for the special blocks of the cdl format.
693 * Only returns something useful if dasd_eckd_cdl_special is true
697 dasd_eckd_cdl_reclen(int recid)
700 return sizes_trk0[recid];
703 /* create unique id from private structure. */
704 static void create_uid(struct dasd_eckd_private *private)
707 struct dasd_uid *uid;
710 memset(uid, 0, sizeof(struct dasd_uid));
711 memcpy(uid->vendor, private->ned->HDA_manufacturer,
712 sizeof(uid->vendor) - 1);
713 EBCASC(uid->vendor, sizeof(uid->vendor) - 1);
714 memcpy(uid->serial, private->ned->HDA_location,
715 sizeof(uid->serial) - 1);
716 EBCASC(uid->serial, sizeof(uid->serial) - 1);
717 uid->ssid = private->gneq->subsystemID;
718 uid->real_unit_addr = private->ned->unit_addr;
720 uid->type = private->sneq->sua_flags;
721 if (uid->type == UA_BASE_PAV_ALIAS)
722 uid->base_unit_addr = private->sneq->base_unit_addr;
724 uid->type = UA_BASE_DEVICE;
726 if (private->vdsneq) {
727 for (count = 0; count < 16; count++) {
728 sprintf(uid->vduit+2*count, "%02x",
729 private->vdsneq->uit[count]);
735 * Generate device unique id that specifies the physical device.
737 static int dasd_eckd_generate_uid(struct dasd_device *device)
739 struct dasd_eckd_private *private = device->private;
744 if (!private->ned || !private->gneq)
746 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
748 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
752 static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid)
754 struct dasd_eckd_private *private = device->private;
758 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
760 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
767 * compare device UID with data of a given dasd_eckd_private structure
770 static int dasd_eckd_compare_path_uid(struct dasd_device *device,
771 struct dasd_eckd_private *private)
773 struct dasd_uid device_uid;
776 dasd_eckd_get_uid(device, &device_uid);
778 return memcmp(&device_uid, &private->uid, sizeof(struct dasd_uid));
781 static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device,
782 struct dasd_ccw_req *cqr,
788 * buffer has to start with EBCDIC "V1.0" to show
789 * support for virtual device SNEQ
791 rcd_buffer[0] = 0xE5;
792 rcd_buffer[1] = 0xF1;
793 rcd_buffer[2] = 0x4B;
794 rcd_buffer[3] = 0xF0;
797 ccw->cmd_code = DASD_ECKD_CCW_RCD;
799 ccw->cda = (__u32)(addr_t)rcd_buffer;
800 ccw->count = DASD_ECKD_RCD_DATA_SIZE;
801 cqr->magic = DASD_ECKD_MAGIC;
803 cqr->startdev = device;
804 cqr->memdev = device;
806 cqr->expires = 10*HZ;
809 cqr->buildclk = get_tod_clock();
810 cqr->status = DASD_CQR_FILLED;
811 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags);
815 * Wakeup helper for read_conf
816 * if the cqr is not done and needs some error recovery
817 * the buffer has to be re-initialized with the EBCDIC "V1.0"
818 * to show support for virtual device SNEQ
820 static void read_conf_cb(struct dasd_ccw_req *cqr, void *data)
825 if (cqr->status != DASD_CQR_DONE) {
827 rcd_buffer = (__u8 *)((addr_t) ccw->cda);
828 memset(rcd_buffer, 0, sizeof(*rcd_buffer));
830 rcd_buffer[0] = 0xE5;
831 rcd_buffer[1] = 0xF1;
832 rcd_buffer[2] = 0x4B;
833 rcd_buffer[3] = 0xF0;
835 dasd_wakeup_cb(cqr, data);
838 static int dasd_eckd_read_conf_immediately(struct dasd_device *device,
839 struct dasd_ccw_req *cqr,
846 * sanity check: scan for RCD command in extended SenseID data
847 * some devices do not support RCD
849 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD);
850 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD)
853 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm);
854 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
855 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags);
857 cqr->callback = read_conf_cb;
858 rc = dasd_sleep_on_immediatly(cqr);
862 static int dasd_eckd_read_conf_lpm(struct dasd_device *device,
864 int *rcd_buffer_size, __u8 lpm)
867 char *rcd_buf = NULL;
869 struct dasd_ccw_req *cqr;
872 * sanity check: scan for RCD command in extended SenseID data
873 * some devices do not support RCD
875 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD);
876 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) {
880 rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA);
885 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */,
886 0, /* use rcd_buf as data ara */
889 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
890 "Could not allocate RCD request");
894 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm);
895 cqr->callback = read_conf_cb;
896 ret = dasd_sleep_on(cqr);
898 * on success we update the user input parms
900 dasd_sfree_request(cqr, cqr->memdev);
904 *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE;
905 *rcd_buffer = rcd_buf;
910 *rcd_buffer_size = 0;
914 static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private)
917 struct dasd_sneq *sneq;
921 private->sneq = NULL;
922 private->vdsneq = NULL;
923 private->gneq = NULL;
924 count = private->conf_len / sizeof(struct dasd_sneq);
925 sneq = (struct dasd_sneq *)private->conf_data;
926 for (i = 0; i < count; ++i) {
927 if (sneq->flags.identifier == 1 && sneq->format == 1)
928 private->sneq = sneq;
929 else if (sneq->flags.identifier == 1 && sneq->format == 4)
930 private->vdsneq = (struct vd_sneq *)sneq;
931 else if (sneq->flags.identifier == 2)
932 private->gneq = (struct dasd_gneq *)sneq;
933 else if (sneq->flags.identifier == 3 && sneq->res1 == 1)
934 private->ned = (struct dasd_ned *)sneq;
937 if (!private->ned || !private->gneq) {
939 private->sneq = NULL;
940 private->vdsneq = NULL;
941 private->gneq = NULL;
948 static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len)
950 struct dasd_gneq *gneq;
953 count = conf_len / sizeof(*gneq);
954 gneq = (struct dasd_gneq *)conf_data;
956 for (i = 0; i < count; ++i) {
957 if (gneq->flags.identifier == 2) {
964 return ((char *)gneq)[18] & 0x07;
969 static void dasd_eckd_clear_conf_data(struct dasd_device *device)
971 struct dasd_eckd_private *private = device->private;
974 private->conf_data = NULL;
975 private->conf_len = 0;
976 for (i = 0; i < 8; i++) {
977 kfree(device->path[i].conf_data);
978 device->path[i].conf_data = NULL;
979 device->path[i].cssid = 0;
980 device->path[i].ssid = 0;
981 device->path[i].chpid = 0;
986 static int dasd_eckd_read_conf(struct dasd_device *device)
989 int conf_len, conf_data_saved;
990 int rc, path_err, pos;
992 struct dasd_eckd_private *private, path_private;
993 struct dasd_uid *uid;
994 char print_path_uid[60], print_device_uid[60];
995 struct channel_path_desc *chp_desc;
996 struct subchannel_id sch_id;
998 private = device->private;
999 opm = ccw_device_get_path_mask(device->cdev);
1000 ccw_device_get_schid(device->cdev, &sch_id);
1001 conf_data_saved = 0;
1003 /* get configuration data per operational path */
1004 for (lpm = 0x80; lpm; lpm>>= 1) {
1007 rc = dasd_eckd_read_conf_lpm(device, &conf_data,
1009 if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */
1010 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1011 "Read configuration data returned "
1015 if (conf_data == NULL) {
1016 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1017 "No configuration data "
1019 /* no further analysis possible */
1020 dasd_path_add_opm(device, opm);
1021 continue; /* no error */
1023 /* save first valid configuration data */
1024 if (!conf_data_saved) {
1025 /* initially clear previously stored conf_data */
1026 dasd_eckd_clear_conf_data(device);
1027 private->conf_data = conf_data;
1028 private->conf_len = conf_len;
1029 if (dasd_eckd_identify_conf_parts(private)) {
1030 private->conf_data = NULL;
1031 private->conf_len = 0;
1035 pos = pathmask_to_pos(lpm);
1036 /* store per path conf_data */
1037 device->path[pos].conf_data = conf_data;
1038 device->path[pos].cssid = sch_id.cssid;
1039 device->path[pos].ssid = sch_id.ssid;
1040 chp_desc = ccw_device_get_chp_desc(device->cdev, pos);
1042 device->path[pos].chpid = chp_desc->chpid;
1045 * build device UID that other path data
1046 * can be compared to it
1048 dasd_eckd_generate_uid(device);
1051 path_private.conf_data = conf_data;
1052 path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE;
1053 if (dasd_eckd_identify_conf_parts(
1055 path_private.conf_data = NULL;
1056 path_private.conf_len = 0;
1060 if (dasd_eckd_compare_path_uid(
1061 device, &path_private)) {
1062 uid = &path_private.uid;
1063 if (strlen(uid->vduit) > 0)
1064 snprintf(print_path_uid,
1065 sizeof(print_path_uid),
1066 "%s.%s.%04x.%02x.%s",
1067 uid->vendor, uid->serial,
1068 uid->ssid, uid->real_unit_addr,
1071 snprintf(print_path_uid,
1072 sizeof(print_path_uid),
1074 uid->vendor, uid->serial,
1076 uid->real_unit_addr);
1077 uid = &private->uid;
1078 if (strlen(uid->vduit) > 0)
1079 snprintf(print_device_uid,
1080 sizeof(print_device_uid),
1081 "%s.%s.%04x.%02x.%s",
1082 uid->vendor, uid->serial,
1083 uid->ssid, uid->real_unit_addr,
1086 snprintf(print_device_uid,
1087 sizeof(print_device_uid),
1089 uid->vendor, uid->serial,
1091 uid->real_unit_addr);
1092 dev_err(&device->cdev->dev,
1093 "Not all channel paths lead to "
1094 "the same device, path %02X leads to "
1095 "device %s instead of %s\n", lpm,
1096 print_path_uid, print_device_uid);
1098 dasd_path_add_cablepm(device, lpm);
1101 pos = pathmask_to_pos(lpm);
1102 /* store per path conf_data */
1103 device->path[pos].conf_data = conf_data;
1104 device->path[pos].cssid = sch_id.cssid;
1105 device->path[pos].ssid = sch_id.ssid;
1106 chp_desc = ccw_device_get_chp_desc(device->cdev, pos);
1108 device->path[pos].chpid = chp_desc->chpid;
1110 path_private.conf_data = NULL;
1111 path_private.conf_len = 0;
1113 switch (dasd_eckd_path_access(conf_data, conf_len)) {
1115 dasd_path_add_nppm(device, lpm);
1118 dasd_path_add_ppm(device, lpm);
1121 if (!dasd_path_get_opm(device)) {
1122 dasd_path_set_opm(device, lpm);
1123 dasd_generic_path_operational(device);
1125 dasd_path_add_opm(device, lpm);
1132 static u32 get_fcx_max_data(struct dasd_device *device)
1134 struct dasd_eckd_private *private = device->private;
1135 int fcx_in_css, fcx_in_gneq, fcx_in_features;
1141 /* is transport mode supported? */
1142 fcx_in_css = css_general_characteristics.fcx;
1143 fcx_in_gneq = private->gneq->reserved2[7] & 0x04;
1144 fcx_in_features = private->features.feature[40] & 0x80;
1145 tpm = fcx_in_css && fcx_in_gneq && fcx_in_features;
1150 mdc = ccw_device_get_mdc(device->cdev, 0);
1152 dev_warn(&device->cdev->dev, "Detecting the maximum supported data size for zHPF requests failed\n");
1155 return (u32)mdc * FCX_MAX_DATA_FACTOR;
1159 static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm)
1161 struct dasd_eckd_private *private = device->private;
1165 if (private->fcx_max_data) {
1166 mdc = ccw_device_get_mdc(device->cdev, lpm);
1168 dev_warn(&device->cdev->dev,
1169 "Detecting the maximum data size for zHPF "
1170 "requests failed (rc=%d) for a new path %x\n",
1174 fcx_max_data = (u32)mdc * FCX_MAX_DATA_FACTOR;
1175 if (fcx_max_data < private->fcx_max_data) {
1176 dev_warn(&device->cdev->dev,
1177 "The maximum data size for zHPF requests %u "
1178 "on a new path %x is below the active maximum "
1179 "%u\n", fcx_max_data, lpm,
1180 private->fcx_max_data);
1187 static int rebuild_device_uid(struct dasd_device *device,
1188 struct path_verification_work_data *data)
1190 struct dasd_eckd_private *private = device->private;
1191 __u8 lpm, opm = dasd_path_get_opm(device);
1194 for (lpm = 0x80; lpm; lpm >>= 1) {
1197 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer));
1198 memset(&data->cqr, 0, sizeof(data->cqr));
1199 data->cqr.cpaddr = &data->ccw;
1200 rc = dasd_eckd_read_conf_immediately(device, &data->cqr,
1205 if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */
1207 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1208 "Read configuration data "
1209 "returned error %d", rc);
1212 memcpy(private->conf_data, data->rcd_buffer,
1213 DASD_ECKD_RCD_DATA_SIZE);
1214 if (dasd_eckd_identify_conf_parts(private)) {
1216 } else /* first valid path is enough */
1221 rc = dasd_eckd_generate_uid(device);
1226 static void do_path_verification_work(struct work_struct *work)
1228 struct path_verification_work_data *data;
1229 struct dasd_device *device;
1230 struct dasd_eckd_private path_private;
1231 struct dasd_uid *uid;
1232 __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE];
1233 __u8 lpm, opm, npm, ppm, epm, hpfpm, cablepm;
1234 unsigned long flags;
1238 data = container_of(work, struct path_verification_work_data, worker);
1239 device = data->device;
1241 /* delay path verification until device was resumed */
1242 if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) {
1243 schedule_work(work);
1246 /* check if path verification already running and delay if so */
1247 if (test_and_set_bit(DASD_FLAG_PATH_VERIFY, &device->flags)) {
1248 schedule_work(work);
1258 for (lpm = 0x80; lpm; lpm >>= 1) {
1259 if (!(lpm & data->tbvpm))
1261 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer));
1262 memset(&data->cqr, 0, sizeof(data->cqr));
1263 data->cqr.cpaddr = &data->ccw;
1264 rc = dasd_eckd_read_conf_immediately(device, &data->cqr,
1268 switch (dasd_eckd_path_access(data->rcd_buffer,
1269 DASD_ECKD_RCD_DATA_SIZE)
1279 } else if (rc == -EOPNOTSUPP) {
1280 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1281 "path verification: No configuration "
1284 } else if (rc == -EAGAIN) {
1285 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1286 "path verification: device is stopped,"
1287 " try again later");
1290 dev_warn(&device->cdev->dev,
1291 "Reading device feature codes failed "
1292 "(rc=%d) for new path %x\n", rc, lpm);
1295 if (verify_fcx_max_data(device, lpm)) {
1304 * save conf_data for comparison after
1305 * rebuild_device_uid may have changed
1308 memcpy(&path_rcd_buf, data->rcd_buffer,
1309 DASD_ECKD_RCD_DATA_SIZE);
1310 path_private.conf_data = (void *) &path_rcd_buf;
1311 path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE;
1312 if (dasd_eckd_identify_conf_parts(&path_private)) {
1313 path_private.conf_data = NULL;
1314 path_private.conf_len = 0;
1319 * compare path UID with device UID only if at least
1320 * one valid path is left
1321 * in other case the device UID may have changed and
1322 * the first working path UID will be used as device UID
1324 if (dasd_path_get_opm(device) &&
1325 dasd_eckd_compare_path_uid(device, &path_private)) {
1327 * the comparison was not successful
1328 * rebuild the device UID with at least one
1329 * known path in case a z/VM hyperswap command
1330 * has changed the device
1332 * after this compare again
1334 * if either the rebuild or the recompare fails
1335 * the path can not be used
1337 if (rebuild_device_uid(device, data) ||
1338 dasd_eckd_compare_path_uid(
1339 device, &path_private)) {
1340 uid = &path_private.uid;
1341 if (strlen(uid->vduit) > 0)
1342 snprintf(print_uid, sizeof(print_uid),
1343 "%s.%s.%04x.%02x.%s",
1344 uid->vendor, uid->serial,
1345 uid->ssid, uid->real_unit_addr,
1348 snprintf(print_uid, sizeof(print_uid),
1350 uid->vendor, uid->serial,
1352 uid->real_unit_addr);
1353 dev_err(&device->cdev->dev,
1354 "The newly added channel path %02X "
1355 "will not be used because it leads "
1356 "to a different device %s\n",
1367 * There is a small chance that a path is lost again between
1368 * above path verification and the following modification of
1369 * the device opm mask. We could avoid that race here by using
1370 * yet another path mask, but we rather deal with this unlikely
1371 * situation in dasd_start_IO.
1373 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
1374 if (!dasd_path_get_opm(device) && opm) {
1375 dasd_path_set_opm(device, opm);
1376 dasd_generic_path_operational(device);
1378 dasd_path_add_opm(device, opm);
1380 dasd_path_add_nppm(device, npm);
1381 dasd_path_add_ppm(device, ppm);
1382 dasd_path_add_tbvpm(device, epm);
1383 dasd_path_add_cablepm(device, cablepm);
1384 dasd_path_add_nohpfpm(device, hpfpm);
1385 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
1387 clear_bit(DASD_FLAG_PATH_VERIFY, &device->flags);
1388 dasd_put_device(device);
1390 mutex_unlock(&dasd_path_verification_mutex);
1395 static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm)
1397 struct path_verification_work_data *data;
1399 data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA);
1401 if (mutex_trylock(&dasd_path_verification_mutex)) {
1402 data = path_verification_worker;
1407 memset(data, 0, sizeof(*data));
1410 INIT_WORK(&data->worker, do_path_verification_work);
1411 dasd_get_device(device);
1412 data->device = device;
1414 schedule_work(&data->worker);
1418 static void dasd_eckd_reset_path(struct dasd_device *device, __u8 pm)
1420 struct dasd_eckd_private *private = device->private;
1421 unsigned long flags;
1423 if (!private->fcx_max_data)
1424 private->fcx_max_data = get_fcx_max_data(device);
1425 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
1426 dasd_path_set_tbvpm(device, pm ? : dasd_path_get_notoperpm(device));
1427 dasd_schedule_device_bh(device);
1428 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
1431 static int dasd_eckd_read_features(struct dasd_device *device)
1433 struct dasd_eckd_private *private = device->private;
1434 struct dasd_psf_prssd_data *prssdp;
1435 struct dasd_rssd_features *features;
1436 struct dasd_ccw_req *cqr;
1440 memset(&private->features, 0, sizeof(struct dasd_rssd_features));
1441 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
1442 (sizeof(struct dasd_psf_prssd_data) +
1443 sizeof(struct dasd_rssd_features)),
1446 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not "
1447 "allocate initialization request");
1448 return PTR_ERR(cqr);
1450 cqr->startdev = device;
1451 cqr->memdev = device;
1454 cqr->expires = 10 * HZ;
1456 /* Prepare for Read Subsystem Data */
1457 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
1458 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
1459 prssdp->order = PSF_ORDER_PRSSD;
1460 prssdp->suborder = 0x41; /* Read Feature Codes */
1461 /* all other bytes of prssdp must be zero */
1464 ccw->cmd_code = DASD_ECKD_CCW_PSF;
1465 ccw->count = sizeof(struct dasd_psf_prssd_data);
1466 ccw->flags |= CCW_FLAG_CC;
1467 ccw->cda = (__u32)(addr_t) prssdp;
1469 /* Read Subsystem Data - feature codes */
1470 features = (struct dasd_rssd_features *) (prssdp + 1);
1471 memset(features, 0, sizeof(struct dasd_rssd_features));
1474 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
1475 ccw->count = sizeof(struct dasd_rssd_features);
1476 ccw->cda = (__u32)(addr_t) features;
1478 cqr->buildclk = get_tod_clock();
1479 cqr->status = DASD_CQR_FILLED;
1480 rc = dasd_sleep_on(cqr);
1482 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
1483 features = (struct dasd_rssd_features *) (prssdp + 1);
1484 memcpy(&private->features, features,
1485 sizeof(struct dasd_rssd_features));
1487 dev_warn(&device->cdev->dev, "Reading device feature codes"
1488 " failed with rc=%d\n", rc);
1489 dasd_sfree_request(cqr, cqr->memdev);
1495 * Build CP for Perform Subsystem Function - SSC.
1497 static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device,
1500 struct dasd_ccw_req *cqr;
1501 struct dasd_psf_ssc_data *psf_ssc_data;
1504 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ ,
1505 sizeof(struct dasd_psf_ssc_data),
1509 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1510 "Could not allocate PSF-SSC request");
1513 psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data;
1514 psf_ssc_data->order = PSF_ORDER_SSC;
1515 psf_ssc_data->suborder = 0xc0;
1517 psf_ssc_data->suborder |= 0x08;
1518 psf_ssc_data->reserved[0] = 0x88;
1521 ccw->cmd_code = DASD_ECKD_CCW_PSF;
1522 ccw->cda = (__u32)(addr_t)psf_ssc_data;
1525 cqr->startdev = device;
1526 cqr->memdev = device;
1529 cqr->expires = 10*HZ;
1530 cqr->buildclk = get_tod_clock();
1531 cqr->status = DASD_CQR_FILLED;
1536 * Perform Subsystem Function.
1537 * It is necessary to trigger CIO for channel revalidation since this
1538 * call might change behaviour of DASD devices.
1541 dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav,
1542 unsigned long flags)
1544 struct dasd_ccw_req *cqr;
1547 cqr = dasd_eckd_build_psf_ssc(device, enable_pav);
1549 return PTR_ERR(cqr);
1552 * set flags e.g. turn on failfast, to prevent blocking
1553 * the calling function should handle failed requests
1555 cqr->flags |= flags;
1557 rc = dasd_sleep_on(cqr);
1559 /* trigger CIO to reprobe devices */
1560 css_schedule_reprobe();
1561 else if (cqr->intrc == -EAGAIN)
1564 dasd_sfree_request(cqr, cqr->memdev);
1569 * Valide storage server of current device.
1571 static int dasd_eckd_validate_server(struct dasd_device *device,
1572 unsigned long flags)
1574 struct dasd_eckd_private *private = device->private;
1577 if (private->uid.type == UA_BASE_PAV_ALIAS ||
1578 private->uid.type == UA_HYPER_PAV_ALIAS)
1580 if (dasd_nopav || MACHINE_IS_VM)
1584 rc = dasd_eckd_psf_ssc(device, enable_pav, flags);
1586 /* may be requested feature is not available on server,
1587 * therefore just report error and go ahead */
1588 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x "
1589 "returned rc=%d", private->uid.ssid, rc);
1594 * worker to do a validate server in case of a lost pathgroup
1596 static void dasd_eckd_do_validate_server(struct work_struct *work)
1598 struct dasd_device *device = container_of(work, struct dasd_device,
1600 unsigned long flags = 0;
1602 set_bit(DASD_CQR_FLAGS_FAILFAST, &flags);
1603 if (dasd_eckd_validate_server(device, flags)
1605 /* schedule worker again if failed */
1606 schedule_work(&device->kick_validate);
1610 dasd_put_device(device);
1613 static void dasd_eckd_kick_validate_server(struct dasd_device *device)
1615 dasd_get_device(device);
1616 /* exit if device not online or in offline processing */
1617 if (test_bit(DASD_FLAG_OFFLINE, &device->flags) ||
1618 device->state < DASD_STATE_ONLINE) {
1619 dasd_put_device(device);
1622 /* queue call to do_validate_server to the kernel event daemon. */
1623 if (!schedule_work(&device->kick_validate))
1624 dasd_put_device(device);
1628 * Check device characteristics.
1629 * If the device is accessible using ECKD discipline, the device is enabled.
1632 dasd_eckd_check_characteristics(struct dasd_device *device)
1634 struct dasd_eckd_private *private = device->private;
1635 struct dasd_block *block;
1636 struct dasd_uid temp_uid;
1639 unsigned long value;
1641 /* setup work queue for validate server*/
1642 INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server);
1643 /* setup work queue for summary unit check */
1644 INIT_WORK(&device->suc_work, dasd_alias_handle_summary_unit_check);
1646 if (!ccw_device_is_pathgroup(device->cdev)) {
1647 dev_warn(&device->cdev->dev,
1648 "A channel path group could not be established\n");
1651 if (!ccw_device_is_multipath(device->cdev)) {
1652 dev_info(&device->cdev->dev,
1653 "The DASD is not operating in multipath mode\n");
1656 private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA);
1658 dev_warn(&device->cdev->dev,
1659 "Allocating memory for private DASD data "
1663 device->private = private;
1665 memset(private, 0, sizeof(*private));
1667 /* Invalidate status of initial analysis. */
1668 private->init_cqr_status = -1;
1669 /* Set default cache operations. */
1670 private->attrib.operation = DASD_NORMAL_CACHE;
1671 private->attrib.nr_cyl = 0;
1673 /* Read Configuration Data */
1674 rc = dasd_eckd_read_conf(device);
1678 /* set some default values */
1679 device->default_expires = DASD_EXPIRES;
1680 device->default_retries = DASD_RETRIES;
1681 device->path_thrhld = DASD_ECKD_PATH_THRHLD;
1682 device->path_interval = DASD_ECKD_PATH_INTERVAL;
1684 if (private->gneq) {
1686 for (i = 0; i < private->gneq->timeout.value; i++)
1688 value = value * private->gneq->timeout.number;
1689 /* do not accept useless values */
1690 if (value != 0 && value <= DASD_EXPIRES_MAX)
1691 device->default_expires = value;
1694 dasd_eckd_get_uid(device, &temp_uid);
1695 if (temp_uid.type == UA_BASE_DEVICE) {
1696 block = dasd_alloc_block();
1697 if (IS_ERR(block)) {
1698 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1699 "could not allocate dasd "
1701 rc = PTR_ERR(block);
1704 device->block = block;
1705 block->base = device;
1708 /* register lcu with alias handling, enable PAV */
1709 rc = dasd_alias_make_device_known_to_lcu(device);
1713 dasd_eckd_validate_server(device, 0);
1715 /* device may report different configuration data after LCU setup */
1716 rc = dasd_eckd_read_conf(device);
1720 /* Read Feature Codes */
1721 dasd_eckd_read_features(device);
1723 /* Read Device Characteristics */
1724 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
1725 &private->rdc_data, 64);
1727 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1728 "Read device characteristic failed, rc=%d", rc);
1732 if ((device->features & DASD_FEATURE_USERAW) &&
1733 !(private->rdc_data.facilities.RT_in_LR)) {
1734 dev_err(&device->cdev->dev, "The storage server does not "
1735 "support raw-track access\n");
1740 /* find the valid cylinder size */
1741 if (private->rdc_data.no_cyl == LV_COMPAT_CYL &&
1742 private->rdc_data.long_no_cyl)
1743 private->real_cyl = private->rdc_data.long_no_cyl;
1745 private->real_cyl = private->rdc_data.no_cyl;
1747 private->fcx_max_data = get_fcx_max_data(device);
1749 readonly = dasd_device_is_ro(device);
1751 set_bit(DASD_FLAG_DEVICE_RO, &device->flags);
1753 dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) "
1754 "with %d cylinders, %d heads, %d sectors%s\n",
1755 private->rdc_data.dev_type,
1756 private->rdc_data.dev_model,
1757 private->rdc_data.cu_type,
1758 private->rdc_data.cu_model.model,
1760 private->rdc_data.trk_per_cyl,
1761 private->rdc_data.sec_per_trk,
1762 readonly ? ", read-only device" : "");
1766 dasd_alias_disconnect_device_from_lcu(device);
1768 dasd_free_block(device->block);
1769 device->block = NULL;
1771 dasd_eckd_clear_conf_data(device);
1772 kfree(device->private);
1773 device->private = NULL;
1777 static void dasd_eckd_uncheck_device(struct dasd_device *device)
1779 struct dasd_eckd_private *private = device->private;
1784 dasd_alias_disconnect_device_from_lcu(device);
1785 private->ned = NULL;
1786 private->sneq = NULL;
1787 private->vdsneq = NULL;
1788 private->gneq = NULL;
1789 dasd_eckd_clear_conf_data(device);
1792 static struct dasd_ccw_req *
1793 dasd_eckd_analysis_ccw(struct dasd_device *device)
1795 struct dasd_eckd_private *private = device->private;
1796 struct eckd_count *count_data;
1797 struct LO_eckd_data *LO_data;
1798 struct dasd_ccw_req *cqr;
1800 int cplength, datasize;
1804 datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data);
1805 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device);
1809 /* Define extent for the first 3 tracks. */
1810 define_extent(ccw++, cqr->data, 0, 2,
1811 DASD_ECKD_CCW_READ_COUNT, device, 0);
1812 LO_data = cqr->data + sizeof(struct DE_eckd_data);
1813 /* Locate record for the first 4 records on track 0. */
1814 ccw[-1].flags |= CCW_FLAG_CC;
1815 locate_record(ccw++, LO_data++, 0, 0, 4,
1816 DASD_ECKD_CCW_READ_COUNT, device, 0);
1818 count_data = private->count_area;
1819 for (i = 0; i < 4; i++) {
1820 ccw[-1].flags |= CCW_FLAG_CC;
1821 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
1824 ccw->cda = (__u32)(addr_t) count_data;
1829 /* Locate record for the first record on track 2. */
1830 ccw[-1].flags |= CCW_FLAG_CC;
1831 locate_record(ccw++, LO_data++, 2, 0, 1,
1832 DASD_ECKD_CCW_READ_COUNT, device, 0);
1833 /* Read count ccw. */
1834 ccw[-1].flags |= CCW_FLAG_CC;
1835 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
1838 ccw->cda = (__u32)(addr_t) count_data;
1841 cqr->startdev = device;
1842 cqr->memdev = device;
1844 cqr->buildclk = get_tod_clock();
1845 cqr->status = DASD_CQR_FILLED;
1849 /* differentiate between 'no record found' and any other error */
1850 static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr)
1853 if (init_cqr->status == DASD_CQR_DONE)
1855 else if (init_cqr->status == DASD_CQR_NEED_ERP ||
1856 init_cqr->status == DASD_CQR_FAILED) {
1857 sense = dasd_get_sense(&init_cqr->irb);
1858 if (sense && (sense[1] & SNS1_NO_REC_FOUND))
1859 return INIT_CQR_UNFORMATTED;
1861 return INIT_CQR_ERROR;
1863 return INIT_CQR_ERROR;
1867 * This is the callback function for the init_analysis cqr. It saves
1868 * the status of the initial analysis ccw before it frees it and kicks
1869 * the device to continue the startup sequence. This will call
1870 * dasd_eckd_do_analysis again (if the devices has not been marked
1871 * for deletion in the meantime).
1873 static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr,
1876 struct dasd_device *device = init_cqr->startdev;
1877 struct dasd_eckd_private *private = device->private;
1879 private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr);
1880 dasd_sfree_request(init_cqr, device);
1881 dasd_kick_device(device);
1884 static int dasd_eckd_start_analysis(struct dasd_block *block)
1886 struct dasd_ccw_req *init_cqr;
1888 init_cqr = dasd_eckd_analysis_ccw(block->base);
1889 if (IS_ERR(init_cqr))
1890 return PTR_ERR(init_cqr);
1891 init_cqr->callback = dasd_eckd_analysis_callback;
1892 init_cqr->callback_data = NULL;
1893 init_cqr->expires = 5*HZ;
1894 /* first try without ERP, so we can later handle unformatted
1895 * devices as special case
1897 clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags);
1898 init_cqr->retries = 0;
1899 dasd_add_request_head(init_cqr);
1903 static int dasd_eckd_end_analysis(struct dasd_block *block)
1905 struct dasd_device *device = block->base;
1906 struct dasd_eckd_private *private = device->private;
1907 struct eckd_count *count_area;
1908 unsigned int sb, blk_per_trk;
1910 struct dasd_ccw_req *init_cqr;
1912 status = private->init_cqr_status;
1913 private->init_cqr_status = -1;
1914 if (status == INIT_CQR_ERROR) {
1915 /* try again, this time with full ERP */
1916 init_cqr = dasd_eckd_analysis_ccw(device);
1917 dasd_sleep_on(init_cqr);
1918 status = dasd_eckd_analysis_evaluation(init_cqr);
1919 dasd_sfree_request(init_cqr, device);
1922 if (device->features & DASD_FEATURE_USERAW) {
1923 block->bp_block = DASD_RAW_BLOCKSIZE;
1924 blk_per_trk = DASD_RAW_BLOCK_PER_TRACK;
1925 block->s2b_shift = 3;
1929 if (status == INIT_CQR_UNFORMATTED) {
1930 dev_warn(&device->cdev->dev, "The DASD is not formatted\n");
1931 return -EMEDIUMTYPE;
1932 } else if (status == INIT_CQR_ERROR) {
1933 dev_err(&device->cdev->dev,
1934 "Detecting the DASD disk layout failed because "
1935 "of an I/O error\n");
1939 private->uses_cdl = 1;
1940 /* Check Track 0 for Compatible Disk Layout */
1942 for (i = 0; i < 3; i++) {
1943 if (private->count_area[i].kl != 4 ||
1944 private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 ||
1945 private->count_area[i].cyl != 0 ||
1946 private->count_area[i].head != count_area_head[i] ||
1947 private->count_area[i].record != count_area_rec[i]) {
1948 private->uses_cdl = 0;
1953 count_area = &private->count_area[4];
1955 if (private->uses_cdl == 0) {
1956 for (i = 0; i < 5; i++) {
1957 if ((private->count_area[i].kl != 0) ||
1958 (private->count_area[i].dl !=
1959 private->count_area[0].dl) ||
1960 private->count_area[i].cyl != 0 ||
1961 private->count_area[i].head != count_area_head[i] ||
1962 private->count_area[i].record != count_area_rec[i])
1966 count_area = &private->count_area[0];
1968 if (private->count_area[3].record == 1)
1969 dev_warn(&device->cdev->dev,
1970 "Track 0 has no records following the VTOC\n");
1973 if (count_area != NULL && count_area->kl == 0) {
1974 /* we found notthing violating our disk layout */
1975 if (dasd_check_blocksize(count_area->dl) == 0)
1976 block->bp_block = count_area->dl;
1978 if (block->bp_block == 0) {
1979 dev_warn(&device->cdev->dev,
1980 "The disk layout of the DASD is not supported\n");
1981 return -EMEDIUMTYPE;
1983 block->s2b_shift = 0; /* bits to shift 512 to get a block */
1984 for (sb = 512; sb < block->bp_block; sb = sb << 1)
1987 blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block);
1990 block->blocks = ((unsigned long) private->real_cyl *
1991 private->rdc_data.trk_per_cyl *
1994 dev_info(&device->cdev->dev,
1995 "DASD with %u KB/block, %lu KB total size, %u KB/track, "
1996 "%s\n", (block->bp_block >> 10),
1997 (((unsigned long) private->real_cyl *
1998 private->rdc_data.trk_per_cyl *
1999 blk_per_trk * (block->bp_block >> 9)) >> 1),
2000 ((blk_per_trk * block->bp_block) >> 10),
2002 "compatible disk layout" : "linux disk layout");
2007 static int dasd_eckd_do_analysis(struct dasd_block *block)
2009 struct dasd_eckd_private *private = block->base->private;
2011 if (private->init_cqr_status < 0)
2012 return dasd_eckd_start_analysis(block);
2014 return dasd_eckd_end_analysis(block);
2017 static int dasd_eckd_basic_to_ready(struct dasd_device *device)
2019 return dasd_alias_add_device(device);
2022 static int dasd_eckd_online_to_ready(struct dasd_device *device)
2024 if (cancel_work_sync(&device->reload_device))
2025 dasd_put_device(device);
2026 if (cancel_work_sync(&device->kick_validate))
2027 dasd_put_device(device);
2032 static int dasd_eckd_basic_to_known(struct dasd_device *device)
2034 return dasd_alias_remove_device(device);
2038 dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo)
2040 struct dasd_eckd_private *private = block->base->private;
2042 if (dasd_check_blocksize(block->bp_block) == 0) {
2043 geo->sectors = recs_per_track(&private->rdc_data,
2044 0, block->bp_block);
2046 geo->cylinders = private->rdc_data.no_cyl;
2047 geo->heads = private->rdc_data.trk_per_cyl;
2052 * Build the TCW request for the format check
2054 static struct dasd_ccw_req *
2055 dasd_eckd_build_check_tcw(struct dasd_device *base, struct format_data_t *fdata,
2056 int enable_pav, struct eckd_count *fmt_buffer,
2059 struct dasd_eckd_private *start_priv;
2060 struct dasd_device *startdev = NULL;
2061 struct tidaw *last_tidaw = NULL;
2062 struct dasd_ccw_req *cqr;
2070 startdev = dasd_alias_get_start_dev(base);
2075 start_priv = startdev->private;
2077 count = rpt * (fdata->stop_unit - fdata->start_unit + 1);
2080 * we're adding 'count' amount of tidaw to the itcw.
2081 * calculate the corresponding itcw_size
2083 itcw_size = itcw_calc_size(0, count, 0);
2085 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev);
2089 start_priv->count++;
2091 itcw = itcw_init(cqr->data, itcw_size, ITCW_OP_READ, 0, count, 0);
2097 cqr->cpaddr = itcw_get_tcw(itcw);
2098 rc = prepare_itcw(itcw, fdata->start_unit, fdata->stop_unit,
2099 DASD_ECKD_CCW_READ_COUNT_MT, base, startdev, 0, count,
2100 sizeof(struct eckd_count),
2101 count * sizeof(struct eckd_count), 0, rpt);
2105 for (i = 0; i < count; i++) {
2106 last_tidaw = itcw_add_tidaw(itcw, 0, fmt_buffer++,
2107 sizeof(struct eckd_count));
2108 if (IS_ERR(last_tidaw)) {
2114 last_tidaw->flags |= TIDAW_FLAGS_LAST;
2115 itcw_finalize(itcw);
2118 cqr->startdev = startdev;
2119 cqr->memdev = startdev;
2120 cqr->basedev = base;
2121 cqr->retries = startdev->default_retries;
2122 cqr->expires = startdev->default_expires * HZ;
2123 cqr->buildclk = get_tod_clock();
2124 cqr->status = DASD_CQR_FILLED;
2125 /* Set flags to suppress output for expected errors */
2126 set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags);
2127 set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags);
2132 dasd_sfree_request(cqr, startdev);
2138 * Build the CCW request for the format check
2140 static struct dasd_ccw_req *
2141 dasd_eckd_build_check(struct dasd_device *base, struct format_data_t *fdata,
2142 int enable_pav, struct eckd_count *fmt_buffer, int rpt)
2144 struct dasd_eckd_private *start_priv;
2145 struct dasd_eckd_private *base_priv;
2146 struct dasd_device *startdev = NULL;
2147 struct dasd_ccw_req *cqr;
2150 int cplength, datasize;
2156 startdev = dasd_alias_get_start_dev(base);
2161 start_priv = startdev->private;
2162 base_priv = base->private;
2164 count = rpt * (fdata->stop_unit - fdata->start_unit + 1);
2166 use_prefix = base_priv->features.feature[8] & 0x01;
2170 datasize = sizeof(struct PFX_eckd_data);
2173 datasize = sizeof(struct DE_eckd_data) +
2174 sizeof(struct LO_eckd_data);
2178 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
2183 start_priv->count++;
2188 prefix_LRE(ccw++, data, fdata->start_unit, fdata->stop_unit,
2189 DASD_ECKD_CCW_READ_COUNT, base, startdev, 1, 0,
2192 define_extent(ccw++, data, fdata->start_unit, fdata->stop_unit,
2193 DASD_ECKD_CCW_READ_COUNT, startdev, 0);
2195 data += sizeof(struct DE_eckd_data);
2196 ccw[-1].flags |= CCW_FLAG_CC;
2198 locate_record(ccw++, data, fdata->start_unit, 0, count,
2199 DASD_ECKD_CCW_READ_COUNT, base, 0);
2202 for (i = 0; i < count; i++) {
2203 ccw[-1].flags |= CCW_FLAG_CC;
2204 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
2205 ccw->flags = CCW_FLAG_SLI;
2207 ccw->cda = (__u32)(addr_t) fmt_buffer;
2212 cqr->startdev = startdev;
2213 cqr->memdev = startdev;
2214 cqr->basedev = base;
2215 cqr->retries = DASD_RETRIES;
2216 cqr->expires = startdev->default_expires * HZ;
2217 cqr->buildclk = get_tod_clock();
2218 cqr->status = DASD_CQR_FILLED;
2219 /* Set flags to suppress output for expected errors */
2220 set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags);
2225 static struct dasd_ccw_req *
2226 dasd_eckd_build_format(struct dasd_device *base,
2227 struct format_data_t *fdata,
2230 struct dasd_eckd_private *base_priv;
2231 struct dasd_eckd_private *start_priv;
2232 struct dasd_device *startdev = NULL;
2233 struct dasd_ccw_req *fcp;
2234 struct eckd_count *ect;
2235 struct ch_t address;
2239 int cplength, datasize;
2247 startdev = dasd_alias_get_start_dev(base);
2252 start_priv = startdev->private;
2253 base_priv = base->private;
2255 rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize);
2257 nr_tracks = fdata->stop_unit - fdata->start_unit + 1;
2260 * fdata->intensity is a bit string that tells us what to do:
2261 * Bit 0: write record zero
2262 * Bit 1: write home address, currently not supported
2263 * Bit 2: invalidate tracks
2264 * Bit 3: use OS/390 compatible disk layout (cdl)
2265 * Bit 4: do not allow storage subsystem to modify record zero
2266 * Only some bit combinations do make sense.
2268 if (fdata->intensity & 0x10) {
2270 intensity = fdata->intensity & ~0x10;
2273 intensity = fdata->intensity;
2276 use_prefix = base_priv->features.feature[8] & 0x01;
2278 switch (intensity) {
2279 case 0x00: /* Normal format */
2280 case 0x08: /* Normal format, use cdl. */
2281 cplength = 2 + (rpt*nr_tracks);
2283 datasize = sizeof(struct PFX_eckd_data) +
2284 sizeof(struct LO_eckd_data) +
2285 rpt * nr_tracks * sizeof(struct eckd_count);
2287 datasize = sizeof(struct DE_eckd_data) +
2288 sizeof(struct LO_eckd_data) +
2289 rpt * nr_tracks * sizeof(struct eckd_count);
2291 case 0x01: /* Write record zero and format track. */
2292 case 0x09: /* Write record zero and format track, use cdl. */
2293 cplength = 2 + rpt * nr_tracks;
2295 datasize = sizeof(struct PFX_eckd_data) +
2296 sizeof(struct LO_eckd_data) +
2297 sizeof(struct eckd_count) +
2298 rpt * nr_tracks * sizeof(struct eckd_count);
2300 datasize = sizeof(struct DE_eckd_data) +
2301 sizeof(struct LO_eckd_data) +
2302 sizeof(struct eckd_count) +
2303 rpt * nr_tracks * sizeof(struct eckd_count);
2305 case 0x04: /* Invalidate track. */
2306 case 0x0c: /* Invalidate track, use cdl. */
2309 datasize = sizeof(struct PFX_eckd_data) +
2310 sizeof(struct LO_eckd_data) +
2311 sizeof(struct eckd_count);
2313 datasize = sizeof(struct DE_eckd_data) +
2314 sizeof(struct LO_eckd_data) +
2315 sizeof(struct eckd_count);
2318 dev_warn(&startdev->cdev->dev,
2319 "An I/O control call used incorrect flags 0x%x\n",
2321 return ERR_PTR(-EINVAL);
2323 /* Allocate the format ccw request. */
2324 fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength,
2325 datasize, startdev);
2329 start_priv->count++;
2333 switch (intensity & ~0x08) {
2334 case 0x00: /* Normal format. */
2336 prefix(ccw++, (struct PFX_eckd_data *) data,
2337 fdata->start_unit, fdata->stop_unit,
2338 DASD_ECKD_CCW_WRITE_CKD, base, startdev);
2339 /* grant subsystem permission to format R0 */
2341 ((struct PFX_eckd_data *)data)
2342 ->define_extent.ga_extended |= 0x04;
2343 data += sizeof(struct PFX_eckd_data);
2345 define_extent(ccw++, (struct DE_eckd_data *) data,
2346 fdata->start_unit, fdata->stop_unit,
2347 DASD_ECKD_CCW_WRITE_CKD, startdev, 0);
2348 /* grant subsystem permission to format R0 */
2350 ((struct DE_eckd_data *) data)
2351 ->ga_extended |= 0x04;
2352 data += sizeof(struct DE_eckd_data);
2354 ccw[-1].flags |= CCW_FLAG_CC;
2355 locate_record(ccw++, (struct LO_eckd_data *) data,
2356 fdata->start_unit, 0, rpt*nr_tracks,
2357 DASD_ECKD_CCW_WRITE_CKD, base,
2359 data += sizeof(struct LO_eckd_data);
2361 case 0x01: /* Write record zero + format track. */
2363 prefix(ccw++, (struct PFX_eckd_data *) data,
2364 fdata->start_unit, fdata->stop_unit,
2365 DASD_ECKD_CCW_WRITE_RECORD_ZERO,
2367 data += sizeof(struct PFX_eckd_data);
2369 define_extent(ccw++, (struct DE_eckd_data *) data,
2370 fdata->start_unit, fdata->stop_unit,
2371 DASD_ECKD_CCW_WRITE_RECORD_ZERO, startdev, 0);
2372 data += sizeof(struct DE_eckd_data);
2374 ccw[-1].flags |= CCW_FLAG_CC;
2375 locate_record(ccw++, (struct LO_eckd_data *) data,
2376 fdata->start_unit, 0, rpt * nr_tracks + 1,
2377 DASD_ECKD_CCW_WRITE_RECORD_ZERO, base,
2378 base->block->bp_block);
2379 data += sizeof(struct LO_eckd_data);
2381 case 0x04: /* Invalidate track. */
2383 prefix(ccw++, (struct PFX_eckd_data *) data,
2384 fdata->start_unit, fdata->stop_unit,
2385 DASD_ECKD_CCW_WRITE_CKD, base, startdev);
2386 data += sizeof(struct PFX_eckd_data);
2388 define_extent(ccw++, (struct DE_eckd_data *) data,
2389 fdata->start_unit, fdata->stop_unit,
2390 DASD_ECKD_CCW_WRITE_CKD, startdev, 0);
2391 data += sizeof(struct DE_eckd_data);
2393 ccw[-1].flags |= CCW_FLAG_CC;
2394 locate_record(ccw++, (struct LO_eckd_data *) data,
2395 fdata->start_unit, 0, 1,
2396 DASD_ECKD_CCW_WRITE_CKD, base, 8);
2397 data += sizeof(struct LO_eckd_data);
2401 for (j = 0; j < nr_tracks; j++) {
2402 /* calculate cylinder and head for the current track */
2404 (fdata->start_unit + j) /
2405 base_priv->rdc_data.trk_per_cyl,
2406 (fdata->start_unit + j) %
2407 base_priv->rdc_data.trk_per_cyl);
2408 if (intensity & 0x01) { /* write record zero */
2409 ect = (struct eckd_count *) data;
2410 data += sizeof(struct eckd_count);
2411 ect->cyl = address.cyl;
2412 ect->head = address.head;
2416 ccw[-1].flags |= CCW_FLAG_CC;
2417 ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO;
2418 ccw->flags = CCW_FLAG_SLI;
2420 ccw->cda = (__u32)(addr_t) ect;
2423 if ((intensity & ~0x08) & 0x04) { /* erase track */
2424 ect = (struct eckd_count *) data;
2425 data += sizeof(struct eckd_count);
2426 ect->cyl = address.cyl;
2427 ect->head = address.head;
2431 ccw[-1].flags |= CCW_FLAG_CC;
2432 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD;
2433 ccw->flags = CCW_FLAG_SLI;
2435 ccw->cda = (__u32)(addr_t) ect;
2436 } else { /* write remaining records */
2437 for (i = 0; i < rpt; i++) {
2438 ect = (struct eckd_count *) data;
2439 data += sizeof(struct eckd_count);
2440 ect->cyl = address.cyl;
2441 ect->head = address.head;
2442 ect->record = i + 1;
2444 ect->dl = fdata->blksize;
2446 * Check for special tracks 0-1
2447 * when formatting CDL
2449 if ((intensity & 0x08) &&
2450 address.cyl == 0 && address.head == 0) {
2453 ect->dl = sizes_trk0[i] - 4;
2456 if ((intensity & 0x08) &&
2457 address.cyl == 0 && address.head == 1) {
2459 ect->dl = LABEL_SIZE - 44;
2461 ccw[-1].flags |= CCW_FLAG_CC;
2462 if (i != 0 || j == 0)
2464 DASD_ECKD_CCW_WRITE_CKD;
2467 DASD_ECKD_CCW_WRITE_CKD_MT;
2468 ccw->flags = CCW_FLAG_SLI;
2470 ccw->cda = (__u32)(addr_t) ect;
2476 fcp->startdev = startdev;
2477 fcp->memdev = startdev;
2478 fcp->basedev = base;
2480 fcp->expires = startdev->default_expires * HZ;
2481 fcp->buildclk = get_tod_clock();
2482 fcp->status = DASD_CQR_FILLED;
2488 * Wrapper function to build a CCW request depending on input data
2490 static struct dasd_ccw_req *
2491 dasd_eckd_format_build_ccw_req(struct dasd_device *base,
2492 struct format_data_t *fdata, int enable_pav,
2493 int tpm, struct eckd_count *fmt_buffer, int rpt)
2495 struct dasd_ccw_req *ccw_req;
2498 ccw_req = dasd_eckd_build_format(base, fdata, enable_pav);
2501 ccw_req = dasd_eckd_build_check_tcw(base, fdata,
2505 ccw_req = dasd_eckd_build_check(base, fdata, enable_pav,
2513 * Sanity checks on format_data
2515 static int dasd_eckd_format_sanity_checks(struct dasd_device *base,
2516 struct format_data_t *fdata)
2518 struct dasd_eckd_private *private = base->private;
2520 if (fdata->start_unit >=
2521 (private->real_cyl * private->rdc_data.trk_per_cyl)) {
2522 dev_warn(&base->cdev->dev,
2523 "Start track number %u used in formatting is too big\n",
2527 if (fdata->stop_unit >=
2528 (private->real_cyl * private->rdc_data.trk_per_cyl)) {
2529 dev_warn(&base->cdev->dev,
2530 "Stop track number %u used in formatting is too big\n",
2534 if (fdata->start_unit > fdata->stop_unit) {
2535 dev_warn(&base->cdev->dev,
2536 "Start track %u used in formatting exceeds end track\n",
2540 if (dasd_check_blocksize(fdata->blksize) != 0) {
2541 dev_warn(&base->cdev->dev,
2542 "The DASD cannot be formatted with block size %u\n",
2550 * This function will process format_data originally coming from an IOCTL
2552 static int dasd_eckd_format_process_data(struct dasd_device *base,
2553 struct format_data_t *fdata,
2554 int enable_pav, int tpm,
2555 struct eckd_count *fmt_buffer, int rpt,
2558 struct dasd_eckd_private *private = base->private;
2559 struct dasd_ccw_req *cqr, *n;
2560 struct list_head format_queue;
2561 struct dasd_device *device;
2563 int old_start, old_stop, format_step;
2567 rc = dasd_eckd_format_sanity_checks(base, fdata);
2571 INIT_LIST_HEAD(&format_queue);
2573 old_start = fdata->start_unit;
2574 old_stop = fdata->stop_unit;
2576 if (!tpm && fmt_buffer != NULL) {
2577 /* Command Mode / Format Check */
2579 } else if (tpm && fmt_buffer != NULL) {
2580 /* Transport Mode / Format Check */
2581 format_step = DASD_CQR_MAX_CCW / rpt;
2583 /* Normal Formatting */
2584 format_step = DASD_CQR_MAX_CCW /
2585 recs_per_track(&private->rdc_data, 0, fdata->blksize);
2590 while (fdata->start_unit <= old_stop) {
2591 step = fdata->stop_unit - fdata->start_unit + 1;
2592 if (step > format_step) {
2594 fdata->start_unit + format_step - 1;
2597 cqr = dasd_eckd_format_build_ccw_req(base, fdata,
2602 if (rc == -ENOMEM) {
2603 if (list_empty(&format_queue))
2606 * not enough memory available, start
2607 * requests retry after first requests
2615 list_add_tail(&cqr->blocklist, &format_queue);
2618 step = fdata->stop_unit - fdata->start_unit + 1;
2619 fmt_buffer += rpt * step;
2621 fdata->start_unit = fdata->stop_unit + 1;
2622 fdata->stop_unit = old_stop;
2625 rc = dasd_sleep_on_queue(&format_queue);
2628 list_for_each_entry_safe(cqr, n, &format_queue, blocklist) {
2629 device = cqr->startdev;
2630 private = device->private;
2632 if (cqr->status == DASD_CQR_FAILED) {
2634 * Only get sense data if called by format
2637 if (fmt_buffer && irb) {
2638 sense = dasd_get_sense(&cqr->irb);
2639 memcpy(irb, &cqr->irb, sizeof(*irb));
2643 list_del_init(&cqr->blocklist);
2644 dasd_sfree_request(cqr, device);
2648 if (rc && rc != -EIO)
2652 * In case fewer than the expected records are on the
2653 * track, we will most likely get a 'No Record Found'
2654 * error (in command mode) or a 'File Protected' error
2655 * (in transport mode). Those particular cases shouldn't
2656 * pass the -EIO to the IOCTL, therefore reset the rc
2660 (sense[1] & SNS1_NO_REC_FOUND ||
2661 sense[1] & SNS1_FILE_PROTECTED))
2670 fdata->start_unit = old_start;
2671 fdata->stop_unit = old_stop;
2676 static int dasd_eckd_format_device(struct dasd_device *base,
2677 struct format_data_t *fdata, int enable_pav)
2679 return dasd_eckd_format_process_data(base, fdata, enable_pav, 0, NULL,
2684 * Helper function to count consecutive records of a single track.
2686 static int dasd_eckd_count_records(struct eckd_count *fmt_buffer, int start,
2692 head = fmt_buffer[start].head;
2695 * There are 3 conditions where we stop counting:
2696 * - if data reoccurs (same head and record may reoccur), which may
2697 * happen due to the way DASD_ECKD_CCW_READ_COUNT works
2698 * - when the head changes, because we're iterating over several tracks
2699 * then (DASD_ECKD_CCW_READ_COUNT_MT)
2700 * - when we've reached the end of sensible data in the buffer (the
2701 * record will be 0 then)
2703 for (i = start; i < max; i++) {
2705 if ((fmt_buffer[i].head == head &&
2706 fmt_buffer[i].record == 1) ||
2707 fmt_buffer[i].head != head ||
2708 fmt_buffer[i].record == 0)
2717 * Evaluate a given range of tracks. Data like number of records, blocksize,
2718 * record ids, and key length are compared with expected data.
2720 * If a mismatch occurs, the corresponding error bit is set, as well as
2721 * additional information, depending on the error.
2723 static void dasd_eckd_format_evaluate_tracks(struct eckd_count *fmt_buffer,
2724 struct format_check_t *cdata,
2725 int rpt_max, int rpt_exp,
2726 int trk_per_cyl, int tpm)
2737 trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1;
2738 max_entries = trkcount * rpt_max;
2740 for (i = cdata->expect.start_unit; i <= cdata->expect.stop_unit; i++) {
2741 /* Calculate the correct next starting position in the buffer */
2743 while (fmt_buffer[pos].record == 0 &&
2744 fmt_buffer[pos].dl == 0) {
2745 if (pos++ > max_entries)
2749 if (i != cdata->expect.start_unit)
2750 pos += rpt_max - count;
2753 /* Calculate the expected geo values for the current track */
2754 set_ch_t(&geo, i / trk_per_cyl, i % trk_per_cyl);
2756 /* Count and check number of records */
2757 count = dasd_eckd_count_records(fmt_buffer, pos, pos + rpt_max);
2759 if (count < rpt_exp) {
2760 cdata->result = DASD_FMT_ERR_TOO_FEW_RECORDS;
2763 if (count > rpt_exp) {
2764 cdata->result = DASD_FMT_ERR_TOO_MANY_RECORDS;
2768 for (j = 0; j < count; j++, pos++) {
2769 blksize = cdata->expect.blksize;
2773 * Set special values when checking CDL formatted
2776 if ((cdata->expect.intensity & 0x08) &&
2777 geo.cyl == 0 && geo.head == 0) {
2779 blksize = sizes_trk0[j] - 4;
2783 if ((cdata->expect.intensity & 0x08) &&
2784 geo.cyl == 0 && geo.head == 1) {
2785 blksize = LABEL_SIZE - 44;
2789 /* Check blocksize */
2790 if (fmt_buffer[pos].dl != blksize) {
2791 cdata->result = DASD_FMT_ERR_BLKSIZE;
2794 /* Check if key length is 0 */
2795 if (fmt_buffer[pos].kl != kl) {
2796 cdata->result = DASD_FMT_ERR_KEY_LENGTH;
2799 /* Check if record_id is correct */
2800 if (fmt_buffer[pos].cyl != geo.cyl ||
2801 fmt_buffer[pos].head != geo.head ||
2802 fmt_buffer[pos].record != (j + 1)) {
2803 cdata->result = DASD_FMT_ERR_RECORD_ID;
2811 * In case of no errors, we need to decrease by one
2812 * to get the correct positions.
2814 if (!cdata->result) {
2820 cdata->num_records = count;
2821 cdata->rec = fmt_buffer[pos].record;
2822 cdata->blksize = fmt_buffer[pos].dl;
2823 cdata->key_length = fmt_buffer[pos].kl;
2827 * Check the format of a range of tracks of a DASD.
2829 static int dasd_eckd_check_device_format(struct dasd_device *base,
2830 struct format_check_t *cdata,
2833 struct dasd_eckd_private *private = base->private;
2834 struct eckd_count *fmt_buffer;
2836 int rpt_max, rpt_exp;
2837 int fmt_buffer_size;
2843 trk_per_cyl = private->rdc_data.trk_per_cyl;
2845 /* Get maximum and expected amount of records per track */
2846 rpt_max = recs_per_track(&private->rdc_data, 0, 512) + 1;
2847 rpt_exp = recs_per_track(&private->rdc_data, 0, cdata->expect.blksize);
2849 trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1;
2850 fmt_buffer_size = trkcount * rpt_max * sizeof(struct eckd_count);
2852 fmt_buffer = kzalloc(fmt_buffer_size, GFP_KERNEL | GFP_DMA);
2857 * A certain FICON feature subset is needed to operate in transport
2858 * mode. Additionally, the support for transport mode is implicitly
2859 * checked by comparing the buffer size with fcx_max_data. As long as
2860 * the buffer size is smaller we can operate in transport mode and
2861 * process multiple tracks. If not, only one track at once is being
2862 * processed using command mode.
2864 if ((private->features.feature[40] & 0x04) &&
2865 fmt_buffer_size <= private->fcx_max_data)
2868 rc = dasd_eckd_format_process_data(base, &cdata->expect, enable_pav,
2869 tpm, fmt_buffer, rpt_max, &irb);
2870 if (rc && rc != -EIO)
2874 * If our first attempt with transport mode enabled comes back
2875 * with an incorrect length error, we're going to retry the
2876 * check with command mode.
2878 if (tpm && scsw_cstat(&irb.scsw) == 0x40) {
2880 rc = dasd_eckd_format_process_data(base, &cdata->expect,
2882 fmt_buffer, rpt_max,
2891 dasd_eckd_format_evaluate_tracks(fmt_buffer, cdata, rpt_max, rpt_exp,
2900 static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr)
2902 if (cqr->retries < 0) {
2903 cqr->status = DASD_CQR_FAILED;
2906 cqr->status = DASD_CQR_FILLED;
2907 if (cqr->block && (cqr->startdev != cqr->block->base)) {
2908 dasd_eckd_reset_ccw_to_base_io(cqr);
2909 cqr->startdev = cqr->block->base;
2910 cqr->lpm = dasd_path_get_opm(cqr->block->base);
2914 static dasd_erp_fn_t
2915 dasd_eckd_erp_action(struct dasd_ccw_req * cqr)
2917 struct dasd_device *device = (struct dasd_device *) cqr->startdev;
2918 struct ccw_device *cdev = device->cdev;
2920 switch (cdev->id.cu_type) {
2925 return dasd_3990_erp_action;
2929 return dasd_default_erp_action;
2933 static dasd_erp_fn_t
2934 dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr)
2936 return dasd_default_erp_postaction;
2939 static void dasd_eckd_check_for_device_change(struct dasd_device *device,
2940 struct dasd_ccw_req *cqr,
2945 struct dasd_eckd_private *private = device->private;
2947 /* first of all check for state change pending interrupt */
2948 mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP;
2949 if ((scsw_dstat(&irb->scsw) & mask) == mask) {
2951 * for alias only, not in offline processing
2952 * and only if not suspended
2954 if (!device->block && private->lcu &&
2955 device->state == DASD_STATE_ONLINE &&
2956 !test_bit(DASD_FLAG_OFFLINE, &device->flags) &&
2957 !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) {
2958 /* schedule worker to reload device */
2959 dasd_reload_device(device);
2961 dasd_generic_handle_state_change(device);
2965 sense = dasd_get_sense(irb);
2969 /* summary unit check */
2970 if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) &&
2971 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) {
2972 if (test_and_set_bit(DASD_FLAG_SUC, &device->flags)) {
2973 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2974 "eckd suc: device already notified");
2977 sense = dasd_get_sense(irb);
2979 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2980 "eckd suc: no reason code available");
2981 clear_bit(DASD_FLAG_SUC, &device->flags);
2985 private->suc_reason = sense[8];
2986 DBF_DEV_EVENT(DBF_NOTICE, device, "%s %x",
2987 "eckd handle summary unit check: reason",
2988 private->suc_reason);
2989 dasd_get_device(device);
2990 if (!schedule_work(&device->suc_work))
2991 dasd_put_device(device);
2996 /* service information message SIM */
2997 if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) &&
2998 ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) {
2999 dasd_3990_erp_handle_sim(device, sense);
3003 /* loss of device reservation is handled via base devices only
3004 * as alias devices may be used with several bases
3006 if (device->block && (sense[27] & DASD_SENSE_BIT_0) &&
3007 (sense[7] == 0x3F) &&
3008 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) &&
3009 test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) {
3010 if (device->features & DASD_FEATURE_FAILONSLCK)
3011 set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags);
3012 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags);
3013 dev_err(&device->cdev->dev,
3014 "The device reservation was lost\n");
3018 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single(
3019 struct dasd_device *startdev,
3020 struct dasd_block *block,
3021 struct request *req,
3026 unsigned int first_offs,
3027 unsigned int last_offs,
3028 unsigned int blk_per_trk,
3029 unsigned int blksize)
3031 struct dasd_eckd_private *private;
3032 unsigned long *idaws;
3033 struct LO_eckd_data *LO_data;
3034 struct dasd_ccw_req *cqr;
3036 struct req_iterator iter;
3040 int count, cidaw, cplength, datasize;
3042 unsigned char cmd, rcmd;
3044 struct dasd_device *basedev;
3046 basedev = block->base;
3047 private = basedev->private;
3048 if (rq_data_dir(req) == READ)
3049 cmd = DASD_ECKD_CCW_READ_MT;
3050 else if (rq_data_dir(req) == WRITE)
3051 cmd = DASD_ECKD_CCW_WRITE_MT;
3053 return ERR_PTR(-EINVAL);
3055 /* Check struct bio and count the number of blocks for the request. */
3058 rq_for_each_segment(bv, req, iter) {
3059 if (bv.bv_len & (blksize - 1))
3060 /* Eckd can only do full blocks. */
3061 return ERR_PTR(-EINVAL);
3062 count += bv.bv_len >> (block->s2b_shift + 9);
3063 if (idal_is_needed (page_address(bv.bv_page), bv.bv_len))
3064 cidaw += bv.bv_len >> (block->s2b_shift + 9);
3067 if (count != last_rec - first_rec + 1)
3068 return ERR_PTR(-EINVAL);
3070 /* use the prefix command if available */
3071 use_prefix = private->features.feature[8] & 0x01;
3073 /* 1x prefix + number of blocks */
3074 cplength = 2 + count;
3075 /* 1x prefix + cidaws*sizeof(long) */
3076 datasize = sizeof(struct PFX_eckd_data) +
3077 sizeof(struct LO_eckd_data) +
3078 cidaw * sizeof(unsigned long);
3080 /* 1x define extent + 1x locate record + number of blocks */
3081 cplength = 2 + count;
3082 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */
3083 datasize = sizeof(struct DE_eckd_data) +
3084 sizeof(struct LO_eckd_data) +
3085 cidaw * sizeof(unsigned long);
3087 /* Find out the number of additional locate record ccws for cdl. */
3088 if (private->uses_cdl && first_rec < 2*blk_per_trk) {
3089 if (last_rec >= 2*blk_per_trk)
3090 count = 2*blk_per_trk - first_rec;
3092 datasize += count*sizeof(struct LO_eckd_data);
3094 /* Allocate the ccw request. */
3095 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
3100 /* First ccw is define extent or prefix. */
3102 if (prefix(ccw++, cqr->data, first_trk,
3103 last_trk, cmd, basedev, startdev) == -EAGAIN) {
3104 /* Clock not in sync and XRC is enabled.
3107 dasd_sfree_request(cqr, startdev);
3108 return ERR_PTR(-EAGAIN);
3110 idaws = (unsigned long *) (cqr->data +
3111 sizeof(struct PFX_eckd_data));
3113 if (define_extent(ccw++, cqr->data, first_trk,
3114 last_trk, cmd, basedev, 0) == -EAGAIN) {
3115 /* Clock not in sync and XRC is enabled.
3118 dasd_sfree_request(cqr, startdev);
3119 return ERR_PTR(-EAGAIN);
3121 idaws = (unsigned long *) (cqr->data +
3122 sizeof(struct DE_eckd_data));
3124 /* Build locate_record+read/write/ccws. */
3125 LO_data = (struct LO_eckd_data *) (idaws + cidaw);
3127 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) {
3128 /* Only standard blocks so there is just one locate record. */
3129 ccw[-1].flags |= CCW_FLAG_CC;
3130 locate_record(ccw++, LO_data++, first_trk, first_offs + 1,
3131 last_rec - recid + 1, cmd, basedev, blksize);
3133 rq_for_each_segment(bv, req, iter) {
3134 dst = page_address(bv.bv_page) + bv.bv_offset;
3135 if (dasd_page_cache) {
3136 char *copy = kmem_cache_alloc(dasd_page_cache,
3137 GFP_DMA | __GFP_NOWARN);
3138 if (copy && rq_data_dir(req) == WRITE)
3139 memcpy(copy + bv.bv_offset, dst, bv.bv_len);
3141 dst = copy + bv.bv_offset;
3143 for (off = 0; off < bv.bv_len; off += blksize) {
3144 sector_t trkid = recid;
3145 unsigned int recoffs = sector_div(trkid, blk_per_trk);
3148 /* Locate record for cdl special block ? */
3149 if (private->uses_cdl && recid < 2*blk_per_trk) {
3150 if (dasd_eckd_cdl_special(blk_per_trk, recid)){
3152 count = dasd_eckd_cdl_reclen(recid);
3153 if (count < blksize &&
3154 rq_data_dir(req) == READ)
3155 memset(dst + count, 0xe5,
3158 ccw[-1].flags |= CCW_FLAG_CC;
3159 locate_record(ccw++, LO_data++,
3161 1, rcmd, basedev, count);
3163 /* Locate record for standard blocks ? */
3164 if (private->uses_cdl && recid == 2*blk_per_trk) {
3165 ccw[-1].flags |= CCW_FLAG_CC;
3166 locate_record(ccw++, LO_data++,
3168 last_rec - recid + 1,
3169 cmd, basedev, count);
3171 /* Read/write ccw. */
3172 ccw[-1].flags |= CCW_FLAG_CC;
3173 ccw->cmd_code = rcmd;
3175 if (idal_is_needed(dst, blksize)) {
3176 ccw->cda = (__u32)(addr_t) idaws;
3177 ccw->flags = CCW_FLAG_IDA;
3178 idaws = idal_create_words(idaws, dst, blksize);
3180 ccw->cda = (__u32)(addr_t) dst;
3188 if (blk_noretry_request(req) ||
3189 block->base->features & DASD_FEATURE_FAILFAST)
3190 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
3191 cqr->startdev = startdev;
3192 cqr->memdev = startdev;
3194 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
3195 cqr->lpm = dasd_path_get_ppm(startdev);
3196 cqr->retries = startdev->default_retries;
3197 cqr->buildclk = get_tod_clock();
3198 cqr->status = DASD_CQR_FILLED;
3202 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track(
3203 struct dasd_device *startdev,
3204 struct dasd_block *block,
3205 struct request *req,
3210 unsigned int first_offs,
3211 unsigned int last_offs,
3212 unsigned int blk_per_trk,
3213 unsigned int blksize)
3215 unsigned long *idaws;
3216 struct dasd_ccw_req *cqr;
3218 struct req_iterator iter;
3220 char *dst, *idaw_dst;
3221 unsigned int cidaw, cplength, datasize;
3225 struct dasd_device *basedev;
3226 unsigned int trkcount, count, count_to_trk_end;
3227 unsigned int idaw_len, seg_len, part_len, len_to_track_end;
3228 unsigned char new_track, end_idaw;
3230 unsigned int recoffs;
3232 basedev = block->base;
3233 if (rq_data_dir(req) == READ)
3234 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
3235 else if (rq_data_dir(req) == WRITE)
3236 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
3238 return ERR_PTR(-EINVAL);
3240 /* Track based I/O needs IDAWs for each page, and not just for
3241 * 64 bit addresses. We need additional idals for pages
3242 * that get filled from two tracks, so we use the number
3243 * of records as upper limit.
3245 cidaw = last_rec - first_rec + 1;
3246 trkcount = last_trk - first_trk + 1;
3248 /* 1x prefix + one read/write ccw per track */
3249 cplength = 1 + trkcount;
3251 datasize = sizeof(struct PFX_eckd_data) + cidaw * sizeof(unsigned long);
3253 /* Allocate the ccw request. */
3254 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
3259 /* transfer length factor: how many bytes to read from the last track */
3260 if (first_trk == last_trk)
3261 tlf = last_offs - first_offs + 1;
3263 tlf = last_offs + 1;
3266 if (prefix_LRE(ccw++, cqr->data, first_trk,
3267 last_trk, cmd, basedev, startdev,
3268 1 /* format */, first_offs + 1,
3271 /* Clock not in sync and XRC is enabled.
3274 dasd_sfree_request(cqr, startdev);
3275 return ERR_PTR(-EAGAIN);
3279 * The translation of request into ccw programs must meet the
3280 * following conditions:
3281 * - all idaws but the first and the last must address full pages
3282 * (or 2K blocks on 31-bit)
3283 * - the scope of a ccw and it's idal ends with the track boundaries
3285 idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data));
3289 len_to_track_end = 0;
3292 rq_for_each_segment(bv, req, iter) {
3293 dst = page_address(bv.bv_page) + bv.bv_offset;
3294 seg_len = bv.bv_len;
3298 recoffs = sector_div(trkid, blk_per_trk);
3299 count_to_trk_end = blk_per_trk - recoffs;
3300 count = min((last_rec - recid + 1),
3301 (sector_t)count_to_trk_end);
3302 len_to_track_end = count * blksize;
3303 ccw[-1].flags |= CCW_FLAG_CC;
3304 ccw->cmd_code = cmd;
3305 ccw->count = len_to_track_end;
3306 ccw->cda = (__u32)(addr_t)idaws;
3307 ccw->flags = CCW_FLAG_IDA;
3311 /* first idaw for a ccw may start anywhere */
3315 /* If we start a new idaw, we must make sure that it
3316 * starts on an IDA_BLOCK_SIZE boundary.
3317 * If we continue an idaw, we must make sure that the
3318 * current segment begins where the so far accumulated
3322 if (__pa(dst) & (IDA_BLOCK_SIZE-1)) {
3323 dasd_sfree_request(cqr, startdev);
3324 return ERR_PTR(-ERANGE);
3328 if ((idaw_dst + idaw_len) != dst) {
3329 dasd_sfree_request(cqr, startdev);
3330 return ERR_PTR(-ERANGE);
3332 part_len = min(seg_len, len_to_track_end);
3333 seg_len -= part_len;
3335 idaw_len += part_len;
3336 len_to_track_end -= part_len;
3337 /* collected memory area ends on an IDA_BLOCK border,
3339 * idal_create_words will handle cases where idaw_len
3340 * is larger then IDA_BLOCK_SIZE
3342 if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1)))
3344 /* We also need to end the idaw at track end */
3345 if (!len_to_track_end) {
3350 idaws = idal_create_words(idaws, idaw_dst,
3359 if (blk_noretry_request(req) ||
3360 block->base->features & DASD_FEATURE_FAILFAST)
3361 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
3362 cqr->startdev = startdev;
3363 cqr->memdev = startdev;
3365 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
3366 cqr->lpm = dasd_path_get_ppm(startdev);
3367 cqr->retries = startdev->default_retries;
3368 cqr->buildclk = get_tod_clock();
3369 cqr->status = DASD_CQR_FILLED;
3373 static int prepare_itcw(struct itcw *itcw,
3374 unsigned int trk, unsigned int totrk, int cmd,
3375 struct dasd_device *basedev,
3376 struct dasd_device *startdev,
3377 unsigned int rec_on_trk, int count,
3378 unsigned int blksize,
3379 unsigned int total_data_size,
3381 unsigned int blk_per_trk)
3383 struct PFX_eckd_data pfxdata;
3384 struct dasd_eckd_private *basepriv, *startpriv;
3385 struct DE_eckd_data *dedata;
3386 struct LRE_eckd_data *lredata;
3390 u16 heads, beghead, endhead;
3398 /* setup prefix data */
3399 basepriv = basedev->private;
3400 startpriv = startdev->private;
3401 dedata = &pfxdata.define_extent;
3402 lredata = &pfxdata.locate_record;
3404 memset(&pfxdata, 0, sizeof(pfxdata));
3405 pfxdata.format = 1; /* PFX with LRE */
3406 pfxdata.base_address = basepriv->ned->unit_addr;
3407 pfxdata.base_lss = basepriv->ned->ID;
3408 pfxdata.validity.define_extent = 1;
3410 /* private uid is kept up to date, conf_data may be outdated */
3411 if (startpriv->uid.type == UA_BASE_PAV_ALIAS)
3412 pfxdata.validity.verify_base = 1;
3414 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) {
3415 pfxdata.validity.verify_base = 1;
3416 pfxdata.validity.hyper_pav = 1;
3420 case DASD_ECKD_CCW_READ_TRACK_DATA:
3421 dedata->mask.perm = 0x1;
3422 dedata->attributes.operation = basepriv->attrib.operation;
3423 dedata->blk_size = blksize;
3424 dedata->ga_extended |= 0x42;
3425 lredata->operation.orientation = 0x0;
3426 lredata->operation.operation = 0x0C;
3427 lredata->auxiliary.check_bytes = 0x01;
3428 pfx_cmd = DASD_ECKD_CCW_PFX_READ;
3430 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
3431 dedata->mask.perm = 0x02;
3432 dedata->attributes.operation = basepriv->attrib.operation;
3433 dedata->blk_size = blksize;
3434 rc = check_XRC(NULL, dedata, basedev);
3435 dedata->ga_extended |= 0x42;
3436 lredata->operation.orientation = 0x0;
3437 lredata->operation.operation = 0x3F;
3438 lredata->extended_operation = 0x23;
3439 lredata->auxiliary.check_bytes = 0x2;
3441 * If XRC is supported the System Time Stamp is set. The
3442 * validity of the time stamp must be reflected in the prefix
3445 if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02)
3446 pfxdata.validity.time_stamp = 1; /* 'Time Stamp Valid' */
3447 pfx_cmd = DASD_ECKD_CCW_PFX;
3449 case DASD_ECKD_CCW_READ_COUNT_MT:
3450 dedata->mask.perm = 0x1;
3451 dedata->attributes.operation = DASD_BYPASS_CACHE;
3452 dedata->ga_extended |= 0x42;
3453 dedata->blk_size = blksize;
3454 lredata->operation.orientation = 0x2;
3455 lredata->operation.operation = 0x16;
3456 lredata->auxiliary.check_bytes = 0x01;
3457 pfx_cmd = DASD_ECKD_CCW_PFX_READ;
3460 DBF_DEV_EVENT(DBF_ERR, basedev,
3461 "prepare itcw, unknown opcode 0x%x", cmd);
3468 dedata->attributes.mode = 0x3; /* ECKD */
3470 heads = basepriv->rdc_data.trk_per_cyl;
3471 begcyl = trk / heads;
3472 beghead = trk % heads;
3473 endcyl = totrk / heads;
3474 endhead = totrk % heads;
3476 /* check for sequential prestage - enhance cylinder range */
3477 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE ||
3478 dedata->attributes.operation == DASD_SEQ_ACCESS) {
3480 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl)
3481 endcyl += basepriv->attrib.nr_cyl;
3483 endcyl = (basepriv->real_cyl - 1);
3486 set_ch_t(&dedata->beg_ext, begcyl, beghead);
3487 set_ch_t(&dedata->end_ext, endcyl, endhead);
3489 dedata->ep_format = 0x20; /* records per track is valid */
3490 dedata->ep_rec_per_track = blk_per_trk;
3493 switch (basepriv->rdc_data.dev_type) {
3495 dn = ceil_quot(blksize + 6, 232);
3496 d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34);
3497 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
3500 d = 7 + ceil_quot(blksize + 12, 32);
3501 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
3506 if (cmd == DASD_ECKD_CCW_READ_COUNT_MT) {
3507 lredata->auxiliary.length_valid = 0;
3508 lredata->auxiliary.length_scope = 0;
3509 lredata->sector = 0xff;
3511 lredata->auxiliary.length_valid = 1;
3512 lredata->auxiliary.length_scope = 1;
3513 lredata->sector = sector;
3515 lredata->auxiliary.imbedded_ccw_valid = 1;
3516 lredata->length = tlf;
3517 lredata->imbedded_ccw = cmd;
3518 lredata->count = count;
3519 set_ch_t(&lredata->seek_addr, begcyl, beghead);
3520 lredata->search_arg.cyl = lredata->seek_addr.cyl;
3521 lredata->search_arg.head = lredata->seek_addr.head;
3522 lredata->search_arg.record = rec_on_trk;
3524 dcw = itcw_add_dcw(itcw, pfx_cmd, 0,
3525 &pfxdata, sizeof(pfxdata), total_data_size);
3526 return PTR_RET(dcw);
3529 static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track(
3530 struct dasd_device *startdev,
3531 struct dasd_block *block,
3532 struct request *req,
3537 unsigned int first_offs,
3538 unsigned int last_offs,
3539 unsigned int blk_per_trk,
3540 unsigned int blksize)
3542 struct dasd_ccw_req *cqr;
3543 struct req_iterator iter;
3546 unsigned int trkcount, ctidaw;
3548 struct dasd_device *basedev;
3551 struct tidaw *last_tidaw = NULL;
3555 unsigned int seg_len, part_len, len_to_track_end;
3556 unsigned char new_track;
3557 sector_t recid, trkid;
3559 unsigned int count, count_to_trk_end;
3562 basedev = block->base;
3563 if (rq_data_dir(req) == READ) {
3564 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
3565 itcw_op = ITCW_OP_READ;
3566 } else if (rq_data_dir(req) == WRITE) {
3567 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
3568 itcw_op = ITCW_OP_WRITE;
3570 return ERR_PTR(-EINVAL);
3572 /* trackbased I/O needs address all memory via TIDAWs,
3573 * not just for 64 bit addresses. This allows us to map
3574 * each segment directly to one tidaw.
3575 * In the case of write requests, additional tidaws may
3576 * be needed when a segment crosses a track boundary.
3578 trkcount = last_trk - first_trk + 1;
3580 rq_for_each_segment(bv, req, iter) {
3583 if (rq_data_dir(req) == WRITE)
3584 ctidaw += (last_trk - first_trk);
3586 /* Allocate the ccw request. */
3587 itcw_size = itcw_calc_size(0, ctidaw, 0);
3588 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev);
3592 /* transfer length factor: how many bytes to read from the last track */
3593 if (first_trk == last_trk)
3594 tlf = last_offs - first_offs + 1;
3596 tlf = last_offs + 1;
3599 itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0);
3604 cqr->cpaddr = itcw_get_tcw(itcw);
3605 if (prepare_itcw(itcw, first_trk, last_trk,
3606 cmd, basedev, startdev,
3609 (last_rec - first_rec + 1) * blksize,
3610 tlf, blk_per_trk) == -EAGAIN) {
3611 /* Clock not in sync and XRC is enabled.
3617 len_to_track_end = 0;
3619 * A tidaw can address 4k of memory, but must not cross page boundaries
3620 * We can let the block layer handle this by setting
3621 * blk_queue_segment_boundary to page boundaries and
3622 * blk_max_segment_size to page size when setting up the request queue.
3623 * For write requests, a TIDAW must not cross track boundaries, because
3624 * we have to set the CBC flag on the last tidaw for each track.
3626 if (rq_data_dir(req) == WRITE) {
3629 rq_for_each_segment(bv, req, iter) {
3630 dst = page_address(bv.bv_page) + bv.bv_offset;
3631 seg_len = bv.bv_len;
3635 offs = sector_div(trkid, blk_per_trk);
3636 count_to_trk_end = blk_per_trk - offs;
3637 count = min((last_rec - recid + 1),
3638 (sector_t)count_to_trk_end);
3639 len_to_track_end = count * blksize;
3643 part_len = min(seg_len, len_to_track_end);
3644 seg_len -= part_len;
3645 len_to_track_end -= part_len;
3646 /* We need to end the tidaw at track end */
3647 if (!len_to_track_end) {
3649 tidaw_flags = TIDAW_FLAGS_INSERT_CBC;
3652 last_tidaw = itcw_add_tidaw(itcw, tidaw_flags,
3654 if (IS_ERR(last_tidaw)) {
3662 rq_for_each_segment(bv, req, iter) {
3663 dst = page_address(bv.bv_page) + bv.bv_offset;
3664 last_tidaw = itcw_add_tidaw(itcw, 0x00,
3666 if (IS_ERR(last_tidaw)) {
3672 last_tidaw->flags |= TIDAW_FLAGS_LAST;
3673 last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC;
3674 itcw_finalize(itcw);
3676 if (blk_noretry_request(req) ||
3677 block->base->features & DASD_FEATURE_FAILFAST)
3678 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
3680 cqr->startdev = startdev;
3681 cqr->memdev = startdev;
3683 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
3684 cqr->lpm = dasd_path_get_ppm(startdev);
3685 cqr->retries = startdev->default_retries;
3686 cqr->buildclk = get_tod_clock();
3687 cqr->status = DASD_CQR_FILLED;
3690 dasd_sfree_request(cqr, startdev);
3691 return ERR_PTR(ret);
3694 static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev,
3695 struct dasd_block *block,
3696 struct request *req)
3701 struct dasd_eckd_private *private;
3702 struct dasd_device *basedev;
3703 sector_t first_rec, last_rec;
3704 sector_t first_trk, last_trk;
3705 unsigned int first_offs, last_offs;
3706 unsigned int blk_per_trk, blksize;
3708 unsigned int data_size;
3709 struct dasd_ccw_req *cqr;
3711 basedev = block->base;
3712 private = basedev->private;
3714 /* Calculate number of blocks/records per track. */
3715 blksize = block->bp_block;
3716 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
3717 if (blk_per_trk == 0)
3718 return ERR_PTR(-EINVAL);
3719 /* Calculate record id of first and last block. */
3720 first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift;
3721 first_offs = sector_div(first_trk, blk_per_trk);
3722 last_rec = last_trk =
3723 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift;
3724 last_offs = sector_div(last_trk, blk_per_trk);
3725 cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk);
3727 fcx_multitrack = private->features.feature[40] & 0x20;
3728 data_size = blk_rq_bytes(req);
3729 if (data_size % blksize)
3730 return ERR_PTR(-EINVAL);
3731 /* tpm write request add CBC data on each track boundary */
3732 if (rq_data_dir(req) == WRITE)
3733 data_size += (last_trk - first_trk) * 4;
3735 /* is read track data and write track data in command mode supported? */
3736 cmdrtd = private->features.feature[9] & 0x20;
3737 cmdwtd = private->features.feature[12] & 0x40;
3738 use_prefix = private->features.feature[8] & 0x01;
3741 if (cdlspecial || dasd_page_cache) {
3742 /* do nothing, just fall through to the cmd mode single case */
3743 } else if ((data_size <= private->fcx_max_data)
3744 && (fcx_multitrack || (first_trk == last_trk))) {
3745 cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req,
3746 first_rec, last_rec,
3747 first_trk, last_trk,
3748 first_offs, last_offs,
3749 blk_per_trk, blksize);
3750 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) &&
3751 (PTR_ERR(cqr) != -ENOMEM))
3753 } else if (use_prefix &&
3754 (((rq_data_dir(req) == READ) && cmdrtd) ||
3755 ((rq_data_dir(req) == WRITE) && cmdwtd))) {
3756 cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req,
3757 first_rec, last_rec,
3758 first_trk, last_trk,
3759 first_offs, last_offs,
3760 blk_per_trk, blksize);
3761 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) &&
3762 (PTR_ERR(cqr) != -ENOMEM))
3766 cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req,
3767 first_rec, last_rec,
3768 first_trk, last_trk,
3769 first_offs, last_offs,
3770 blk_per_trk, blksize);
3774 static struct dasd_ccw_req *dasd_eckd_build_cp_raw(struct dasd_device *startdev,
3775 struct dasd_block *block,
3776 struct request *req)
3778 sector_t start_padding_sectors, end_sector_offset, end_padding_sectors;
3779 unsigned int seg_len, len_to_track_end;
3780 unsigned int cidaw, cplength, datasize;
3781 sector_t first_trk, last_trk, sectors;
3782 struct dasd_eckd_private *base_priv;
3783 struct dasd_device *basedev;
3784 struct req_iterator iter;
3785 struct dasd_ccw_req *cqr;
3786 unsigned int first_offs;
3787 unsigned int trkcount;
3788 unsigned long *idaws;
3798 * raw track access needs to be mutiple of 64k and on 64k boundary
3799 * For read requests we can fix an incorrect alignment by padding
3800 * the request with dummy pages.
3802 start_padding_sectors = blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK;
3803 end_sector_offset = (blk_rq_pos(req) + blk_rq_sectors(req)) %
3804 DASD_RAW_SECTORS_PER_TRACK;
3805 end_padding_sectors = (DASD_RAW_SECTORS_PER_TRACK - end_sector_offset) %
3806 DASD_RAW_SECTORS_PER_TRACK;
3807 basedev = block->base;
3808 if ((start_padding_sectors || end_padding_sectors) &&
3809 (rq_data_dir(req) == WRITE)) {
3810 DBF_DEV_EVENT(DBF_ERR, basedev,
3811 "raw write not track aligned (%lu,%lu) req %p",
3812 start_padding_sectors, end_padding_sectors, req);
3813 return ERR_PTR(-EINVAL);
3816 first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK;
3817 last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) /
3818 DASD_RAW_SECTORS_PER_TRACK;
3819 trkcount = last_trk - first_trk + 1;
3822 if (rq_data_dir(req) == READ)
3823 cmd = DASD_ECKD_CCW_READ_TRACK;
3824 else if (rq_data_dir(req) == WRITE)
3825 cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK;
3827 return ERR_PTR(-EINVAL);
3830 * Raw track based I/O needs IDAWs for each page,
3831 * and not just for 64 bit addresses.
3833 cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK;
3836 * struct PFX_eckd_data and struct LRE_eckd_data can have up to 2 bytes
3837 * of extended parameter. This is needed for write full track.
3839 base_priv = basedev->private;
3840 use_prefix = base_priv->features.feature[8] & 0x01;
3842 cplength = 1 + trkcount;
3843 size = sizeof(struct PFX_eckd_data) + 2;
3845 cplength = 2 + trkcount;
3846 size = sizeof(struct DE_eckd_data) +
3847 sizeof(struct LRE_eckd_data) + 2;
3849 size = ALIGN(size, 8);
3851 datasize = size + cidaw * sizeof(unsigned long);
3853 /* Allocate the ccw request. */
3854 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength,
3855 datasize, startdev);
3863 prefix_LRE(ccw++, data, first_trk, last_trk, cmd, basedev,
3864 startdev, 1, first_offs + 1, trkcount, 0, 0);
3866 define_extent(ccw++, data, first_trk, last_trk, cmd, basedev, 0);
3867 ccw[-1].flags |= CCW_FLAG_CC;
3869 data += sizeof(struct DE_eckd_data);
3870 locate_record_ext(ccw++, data, first_trk, first_offs + 1,
3871 trkcount, cmd, basedev, 0, 0);
3874 idaws = (unsigned long *)(cqr->data + size);
3875 len_to_track_end = 0;
3876 if (start_padding_sectors) {
3877 ccw[-1].flags |= CCW_FLAG_CC;
3878 ccw->cmd_code = cmd;
3879 /* maximum 3390 track size */
3881 /* 64k map to one track */
3882 len_to_track_end = 65536 - start_padding_sectors * 512;
3883 ccw->cda = (__u32)(addr_t)idaws;
3884 ccw->flags |= CCW_FLAG_IDA;
3885 ccw->flags |= CCW_FLAG_SLI;
3887 for (sectors = 0; sectors < start_padding_sectors; sectors += 8)
3888 idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE);
3890 rq_for_each_segment(bv, req, iter) {
3891 dst = page_address(bv.bv_page) + bv.bv_offset;
3892 seg_len = bv.bv_len;
3893 if (cmd == DASD_ECKD_CCW_READ_TRACK)
3894 memset(dst, 0, seg_len);
3895 if (!len_to_track_end) {
3896 ccw[-1].flags |= CCW_FLAG_CC;
3897 ccw->cmd_code = cmd;
3898 /* maximum 3390 track size */
3900 /* 64k map to one track */
3901 len_to_track_end = 65536;
3902 ccw->cda = (__u32)(addr_t)idaws;
3903 ccw->flags |= CCW_FLAG_IDA;
3904 ccw->flags |= CCW_FLAG_SLI;
3907 len_to_track_end -= seg_len;
3908 idaws = idal_create_words(idaws, dst, seg_len);
3910 for (sectors = 0; sectors < end_padding_sectors; sectors += 8)
3911 idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE);
3912 if (blk_noretry_request(req) ||
3913 block->base->features & DASD_FEATURE_FAILFAST)
3914 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
3915 cqr->startdev = startdev;
3916 cqr->memdev = startdev;
3918 cqr->expires = startdev->default_expires * HZ;
3919 cqr->lpm = dasd_path_get_ppm(startdev);
3920 cqr->retries = startdev->default_retries;
3921 cqr->buildclk = get_tod_clock();
3922 cqr->status = DASD_CQR_FILLED;
3929 dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req)
3931 struct dasd_eckd_private *private;
3933 struct req_iterator iter;
3936 unsigned int blksize, blk_per_trk, off;
3940 if (!dasd_page_cache)
3942 private = cqr->block->base->private;
3943 blksize = cqr->block->bp_block;
3944 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
3945 recid = blk_rq_pos(req) >> cqr->block->s2b_shift;
3947 /* Skip over define extent & locate record. */
3949 if (private->uses_cdl == 0 || recid > 2*blk_per_trk)
3951 rq_for_each_segment(bv, req, iter) {
3952 dst = page_address(bv.bv_page) + bv.bv_offset;
3953 for (off = 0; off < bv.bv_len; off += blksize) {
3954 /* Skip locate record. */
3955 if (private->uses_cdl && recid <= 2*blk_per_trk)
3958 if (ccw->flags & CCW_FLAG_IDA)
3959 cda = *((char **)((addr_t) ccw->cda));
3961 cda = (char *)((addr_t) ccw->cda);
3963 if (rq_data_dir(req) == READ)
3964 memcpy(dst, cda, bv.bv_len);
3965 kmem_cache_free(dasd_page_cache,
3966 (void *)((addr_t)cda & PAGE_MASK));
3975 status = cqr->status == DASD_CQR_DONE;
3976 dasd_sfree_request(cqr, cqr->memdev);
3981 * Modify ccw/tcw in cqr so it can be started on a base device.
3983 * Note that this is not enough to restart the cqr!
3984 * Either reset cqr->startdev as well (summary unit check handling)
3985 * or restart via separate cqr (as in ERP handling).
3987 void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr)
3990 struct PFX_eckd_data *pfxdata;
3995 if (cqr->cpmode == 1) {
3997 tccb = tcw_get_tccb(tcw);
3998 dcw = (struct dcw *)&tccb->tca[0];
3999 pfxdata = (struct PFX_eckd_data *)&dcw->cd[0];
4000 pfxdata->validity.verify_base = 0;
4001 pfxdata->validity.hyper_pav = 0;
4004 pfxdata = cqr->data;
4005 if (ccw->cmd_code == DASD_ECKD_CCW_PFX) {
4006 pfxdata->validity.verify_base = 0;
4007 pfxdata->validity.hyper_pav = 0;
4012 #define DASD_ECKD_CHANQ_MAX_SIZE 4
4014 static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base,
4015 struct dasd_block *block,
4016 struct request *req)
4018 struct dasd_eckd_private *private;
4019 struct dasd_device *startdev;
4020 unsigned long flags;
4021 struct dasd_ccw_req *cqr;
4023 startdev = dasd_alias_get_start_dev(base);
4026 private = startdev->private;
4027 if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE)
4028 return ERR_PTR(-EBUSY);
4030 spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags);
4032 if ((base->features & DASD_FEATURE_USERAW))
4033 cqr = dasd_eckd_build_cp_raw(startdev, block, req);
4035 cqr = dasd_eckd_build_cp(startdev, block, req);
4038 spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags);
4042 static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr,
4043 struct request *req)
4045 struct dasd_eckd_private *private;
4046 unsigned long flags;
4048 spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags);
4049 private = cqr->memdev->private;
4051 spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags);
4052 return dasd_eckd_free_cp(cqr, req);
4056 dasd_eckd_fill_info(struct dasd_device * device,
4057 struct dasd_information2_t * info)
4059 struct dasd_eckd_private *private = device->private;
4061 info->label_block = 2;
4062 info->FBA_layout = private->uses_cdl ? 0 : 1;
4063 info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL;
4064 info->characteristics_size = sizeof(private->rdc_data);
4065 memcpy(info->characteristics, &private->rdc_data,
4066 sizeof(private->rdc_data));
4067 info->confdata_size = min((unsigned long)private->conf_len,
4068 sizeof(info->configuration_data));
4069 memcpy(info->configuration_data, private->conf_data,
4070 info->confdata_size);
4075 * SECTION: ioctl functions for eckd devices.
4079 * Release device ioctl.
4080 * Buils a channel programm to releases a prior reserved
4081 * (see dasd_eckd_reserve) device.
4084 dasd_eckd_release(struct dasd_device *device)
4086 struct dasd_ccw_req *cqr;
4091 if (!capable(CAP_SYS_ADMIN))
4095 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
4097 mutex_lock(&dasd_reserve_mutex);
4099 cqr = &dasd_reserve_req->cqr;
4100 memset(cqr, 0, sizeof(*cqr));
4101 memset(&dasd_reserve_req->ccw, 0,
4102 sizeof(dasd_reserve_req->ccw));
4103 cqr->cpaddr = &dasd_reserve_req->ccw;
4104 cqr->data = &dasd_reserve_req->data;
4105 cqr->magic = DASD_ECKD_MAGIC;
4108 ccw->cmd_code = DASD_ECKD_CCW_RELEASE;
4109 ccw->flags |= CCW_FLAG_SLI;
4111 ccw->cda = (__u32)(addr_t) cqr->data;
4112 cqr->startdev = device;
4113 cqr->memdev = device;
4114 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
4115 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
4116 cqr->retries = 2; /* set retry counter to enable basic ERP */
4117 cqr->expires = 2 * HZ;
4118 cqr->buildclk = get_tod_clock();
4119 cqr->status = DASD_CQR_FILLED;
4121 rc = dasd_sleep_on_immediatly(cqr);
4123 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags);
4126 mutex_unlock(&dasd_reserve_mutex);
4128 dasd_sfree_request(cqr, cqr->memdev);
4133 * Reserve device ioctl.
4134 * Options are set to 'synchronous wait for interrupt' and
4135 * 'timeout the request'. This leads to a terminate IO if
4136 * the interrupt is outstanding for a certain time.
4139 dasd_eckd_reserve(struct dasd_device *device)
4141 struct dasd_ccw_req *cqr;
4146 if (!capable(CAP_SYS_ADMIN))
4150 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
4152 mutex_lock(&dasd_reserve_mutex);
4154 cqr = &dasd_reserve_req->cqr;
4155 memset(cqr, 0, sizeof(*cqr));
4156 memset(&dasd_reserve_req->ccw, 0,
4157 sizeof(dasd_reserve_req->ccw));
4158 cqr->cpaddr = &dasd_reserve_req->ccw;
4159 cqr->data = &dasd_reserve_req->data;
4160 cqr->magic = DASD_ECKD_MAGIC;
4163 ccw->cmd_code = DASD_ECKD_CCW_RESERVE;
4164 ccw->flags |= CCW_FLAG_SLI;
4166 ccw->cda = (__u32)(addr_t) cqr->data;
4167 cqr->startdev = device;
4168 cqr->memdev = device;
4169 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
4170 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
4171 cqr->retries = 2; /* set retry counter to enable basic ERP */
4172 cqr->expires = 2 * HZ;
4173 cqr->buildclk = get_tod_clock();
4174 cqr->status = DASD_CQR_FILLED;
4176 rc = dasd_sleep_on_immediatly(cqr);
4178 set_bit(DASD_FLAG_IS_RESERVED, &device->flags);
4181 mutex_unlock(&dasd_reserve_mutex);
4183 dasd_sfree_request(cqr, cqr->memdev);
4188 * Steal lock ioctl - unconditional reserve device.
4189 * Buils a channel programm to break a device's reservation.
4190 * (unconditional reserve)
4193 dasd_eckd_steal_lock(struct dasd_device *device)
4195 struct dasd_ccw_req *cqr;
4200 if (!capable(CAP_SYS_ADMIN))
4204 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
4206 mutex_lock(&dasd_reserve_mutex);
4208 cqr = &dasd_reserve_req->cqr;
4209 memset(cqr, 0, sizeof(*cqr));
4210 memset(&dasd_reserve_req->ccw, 0,
4211 sizeof(dasd_reserve_req->ccw));
4212 cqr->cpaddr = &dasd_reserve_req->ccw;
4213 cqr->data = &dasd_reserve_req->data;
4214 cqr->magic = DASD_ECKD_MAGIC;
4217 ccw->cmd_code = DASD_ECKD_CCW_SLCK;
4218 ccw->flags |= CCW_FLAG_SLI;
4220 ccw->cda = (__u32)(addr_t) cqr->data;
4221 cqr->startdev = device;
4222 cqr->memdev = device;
4223 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
4224 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
4225 cqr->retries = 2; /* set retry counter to enable basic ERP */
4226 cqr->expires = 2 * HZ;
4227 cqr->buildclk = get_tod_clock();
4228 cqr->status = DASD_CQR_FILLED;
4230 rc = dasd_sleep_on_immediatly(cqr);
4232 set_bit(DASD_FLAG_IS_RESERVED, &device->flags);
4235 mutex_unlock(&dasd_reserve_mutex);
4237 dasd_sfree_request(cqr, cqr->memdev);
4242 * SNID - Sense Path Group ID
4243 * This ioctl may be used in situations where I/O is stalled due to
4244 * a reserve, so if the normal dasd_smalloc_request fails, we use the
4245 * preallocated dasd_reserve_req.
4247 static int dasd_eckd_snid(struct dasd_device *device,
4250 struct dasd_ccw_req *cqr;
4254 struct dasd_snid_ioctl_data usrparm;
4256 if (!capable(CAP_SYS_ADMIN))
4259 if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
4263 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1,
4264 sizeof(struct dasd_snid_data), device);
4266 mutex_lock(&dasd_reserve_mutex);
4268 cqr = &dasd_reserve_req->cqr;
4269 memset(cqr, 0, sizeof(*cqr));
4270 memset(&dasd_reserve_req->ccw, 0,
4271 sizeof(dasd_reserve_req->ccw));
4272 cqr->cpaddr = &dasd_reserve_req->ccw;
4273 cqr->data = &dasd_reserve_req->data;
4274 cqr->magic = DASD_ECKD_MAGIC;
4277 ccw->cmd_code = DASD_ECKD_CCW_SNID;
4278 ccw->flags |= CCW_FLAG_SLI;
4280 ccw->cda = (__u32)(addr_t) cqr->data;
4281 cqr->startdev = device;
4282 cqr->memdev = device;
4283 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
4284 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
4285 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags);
4287 cqr->expires = 10 * HZ;
4288 cqr->buildclk = get_tod_clock();
4289 cqr->status = DASD_CQR_FILLED;
4290 cqr->lpm = usrparm.path_mask;
4292 rc = dasd_sleep_on_immediatly(cqr);
4293 /* verify that I/O processing didn't modify the path mask */
4294 if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask))
4297 usrparm.data = *((struct dasd_snid_data *)cqr->data);
4298 if (copy_to_user(argp, &usrparm, sizeof(usrparm)))
4303 mutex_unlock(&dasd_reserve_mutex);
4305 dasd_sfree_request(cqr, cqr->memdev);
4310 * Read performance statistics
4313 dasd_eckd_performance(struct dasd_device *device, void __user *argp)
4315 struct dasd_psf_prssd_data *prssdp;
4316 struct dasd_rssd_perf_stats_t *stats;
4317 struct dasd_ccw_req *cqr;
4321 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
4322 (sizeof(struct dasd_psf_prssd_data) +
4323 sizeof(struct dasd_rssd_perf_stats_t)),
4326 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
4327 "Could not allocate initialization request");
4328 return PTR_ERR(cqr);
4330 cqr->startdev = device;
4331 cqr->memdev = device;
4333 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
4334 cqr->expires = 10 * HZ;
4336 /* Prepare for Read Subsystem Data */
4337 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
4338 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
4339 prssdp->order = PSF_ORDER_PRSSD;
4340 prssdp->suborder = 0x01; /* Performance Statistics */
4341 prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */
4344 ccw->cmd_code = DASD_ECKD_CCW_PSF;
4345 ccw->count = sizeof(struct dasd_psf_prssd_data);
4346 ccw->flags |= CCW_FLAG_CC;
4347 ccw->cda = (__u32)(addr_t) prssdp;
4349 /* Read Subsystem Data - Performance Statistics */
4350 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
4351 memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t));
4354 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
4355 ccw->count = sizeof(struct dasd_rssd_perf_stats_t);
4356 ccw->cda = (__u32)(addr_t) stats;
4358 cqr->buildclk = get_tod_clock();
4359 cqr->status = DASD_CQR_FILLED;
4360 rc = dasd_sleep_on(cqr);
4362 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
4363 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
4364 if (copy_to_user(argp, stats,
4365 sizeof(struct dasd_rssd_perf_stats_t)))
4368 dasd_sfree_request(cqr, cqr->memdev);
4373 * Get attributes (cache operations)
4374 * Returnes the cache attributes used in Define Extend (DE).
4377 dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp)
4379 struct dasd_eckd_private *private = device->private;
4380 struct attrib_data_t attrib = private->attrib;
4383 if (!capable(CAP_SYS_ADMIN))
4389 if (copy_to_user(argp, (long *) &attrib,
4390 sizeof(struct attrib_data_t)))
4397 * Set attributes (cache operations)
4398 * Stores the attributes for cache operation to be used in Define Extend (DE).
4401 dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp)
4403 struct dasd_eckd_private *private = device->private;
4404 struct attrib_data_t attrib;
4406 if (!capable(CAP_SYS_ADMIN))
4411 if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t)))
4413 private->attrib = attrib;
4415 dev_info(&device->cdev->dev,
4416 "The DASD cache mode was set to %x (%i cylinder prestage)\n",
4417 private->attrib.operation, private->attrib.nr_cyl);
4422 * Issue syscall I/O to EMC Symmetrix array.
4423 * CCWs are PSF and RSSD
4425 static int dasd_symm_io(struct dasd_device *device, void __user *argp)
4427 struct dasd_symmio_parms usrparm;
4428 char *psf_data, *rssd_result;
4429 struct dasd_ccw_req *cqr;
4434 if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
4438 /* Copy parms from caller */
4440 if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
4442 if (is_compat_task()) {
4443 /* Make sure pointers are sane even on 31 bit. */
4445 if ((usrparm.psf_data >> 32) != 0)
4447 if ((usrparm.rssd_result >> 32) != 0)
4449 usrparm.psf_data &= 0x7fffffffULL;
4450 usrparm.rssd_result &= 0x7fffffffULL;
4452 /* at least 2 bytes are accessed and should be allocated */
4453 if (usrparm.psf_data_len < 2) {
4454 DBF_DEV_EVENT(DBF_WARNING, device,
4455 "Symmetrix ioctl invalid data length %d",
4456 usrparm.psf_data_len);
4460 /* alloc I/O data area */
4461 psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA);
4462 rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA);
4463 if (!psf_data || !rssd_result) {
4468 /* get syscall header from user space */
4470 if (copy_from_user(psf_data,
4471 (void __user *)(unsigned long) usrparm.psf_data,
4472 usrparm.psf_data_len))
4477 /* setup CCWs for PSF + RSSD */
4478 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device);
4480 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
4481 "Could not allocate initialization request");
4486 cqr->startdev = device;
4487 cqr->memdev = device;
4489 cqr->expires = 10 * HZ;
4490 cqr->buildclk = get_tod_clock();
4491 cqr->status = DASD_CQR_FILLED;
4493 /* Build the ccws */
4497 ccw->cmd_code = DASD_ECKD_CCW_PSF;
4498 ccw->count = usrparm.psf_data_len;
4499 ccw->flags |= CCW_FLAG_CC;
4500 ccw->cda = (__u32)(addr_t) psf_data;
4505 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
4506 ccw->count = usrparm.rssd_result_len;
4507 ccw->flags = CCW_FLAG_SLI ;
4508 ccw->cda = (__u32)(addr_t) rssd_result;
4510 rc = dasd_sleep_on(cqr);
4515 if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result,
4516 rssd_result, usrparm.rssd_result_len))
4521 dasd_sfree_request(cqr, cqr->memdev);
4526 DBF_DEV_EVENT(DBF_WARNING, device,
4527 "Symmetrix ioctl (0x%02x 0x%02x): rc=%d",
4528 (int) psf0, (int) psf1, rc);
4533 dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp)
4535 struct dasd_device *device = block->base;
4539 return dasd_eckd_get_attrib(device, argp);
4541 return dasd_eckd_set_attrib(device, argp);
4543 return dasd_eckd_performance(device, argp);
4545 return dasd_eckd_release(device);
4547 return dasd_eckd_reserve(device);
4549 return dasd_eckd_steal_lock(device);
4551 return dasd_eckd_snid(device, argp);
4553 return dasd_symm_io(device, argp);
4560 * Dump the range of CCWs into 'page' buffer
4561 * and return number of printed chars.
4564 dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page)
4570 while (from <= to) {
4571 len += sprintf(page + len, PRINTK_HEADER
4572 " CCW %p: %08X %08X DAT:",
4573 from, ((int *) from)[0], ((int *) from)[1]);
4575 /* get pointer to data (consider IDALs) */
4576 if (from->flags & CCW_FLAG_IDA)
4577 datap = (char *) *((addr_t *) (addr_t) from->cda);
4579 datap = (char *) ((addr_t) from->cda);
4581 /* dump data (max 32 bytes) */
4582 for (count = 0; count < from->count && count < 32; count++) {
4583 if (count % 8 == 0) len += sprintf(page + len, " ");
4584 if (count % 4 == 0) len += sprintf(page + len, " ");
4585 len += sprintf(page + len, "%02x", datap[count]);
4587 len += sprintf(page + len, "\n");
4594 dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb,
4600 sense = (u64 *) dasd_get_sense(irb);
4601 stat = (u64 *) &irb->scsw;
4603 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : "
4604 "%016llx %016llx %016llx %016llx",
4605 reason, *stat, *((u32 *) (stat + 1)),
4606 sense[0], sense[1], sense[2], sense[3]);
4608 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s",
4609 reason, *stat, *((u32 *) (stat + 1)),
4615 * Print sense data and related channel program.
4616 * Parts are printed because printk buffer is only 1024 bytes.
4618 static void dasd_eckd_dump_sense_ccw(struct dasd_device *device,
4619 struct dasd_ccw_req *req, struct irb *irb)
4622 struct ccw1 *first, *last, *fail, *from, *to;
4625 page = (char *) get_zeroed_page(GFP_ATOMIC);
4627 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
4628 "No memory to dump sense data\n");
4631 /* dump the sense data */
4632 len = sprintf(page, PRINTK_HEADER
4633 " I/O status report for device %s:\n",
4634 dev_name(&device->cdev->dev));
4635 len += sprintf(page + len, PRINTK_HEADER
4636 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X "
4638 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw),
4639 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw),
4640 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw),
4641 req ? req->intrc : 0);
4642 len += sprintf(page + len, PRINTK_HEADER
4643 " device %s: Failing CCW: %p\n",
4644 dev_name(&device->cdev->dev),
4645 (void *) (addr_t) irb->scsw.cmd.cpa);
4646 if (irb->esw.esw0.erw.cons) {
4647 for (sl = 0; sl < 4; sl++) {
4648 len += sprintf(page + len, PRINTK_HEADER
4649 " Sense(hex) %2d-%2d:",
4650 (8 * sl), ((8 * sl) + 7));
4652 for (sct = 0; sct < 8; sct++) {
4653 len += sprintf(page + len, " %02x",
4654 irb->ecw[8 * sl + sct]);
4656 len += sprintf(page + len, "\n");
4659 if (irb->ecw[27] & DASD_SENSE_BIT_0) {
4660 /* 24 Byte Sense Data */
4661 sprintf(page + len, PRINTK_HEADER
4662 " 24 Byte: %x MSG %x, "
4663 "%s MSGb to SYSOP\n",
4664 irb->ecw[7] >> 4, irb->ecw[7] & 0x0f,
4665 irb->ecw[1] & 0x10 ? "" : "no");
4667 /* 32 Byte Sense Data */
4668 sprintf(page + len, PRINTK_HEADER
4669 " 32 Byte: Format: %x "
4670 "Exception class %x\n",
4671 irb->ecw[6] & 0x0f, irb->ecw[22] >> 4);
4674 sprintf(page + len, PRINTK_HEADER
4675 " SORRY - NO VALID SENSE AVAILABLE\n");
4677 printk(KERN_ERR "%s", page);
4680 /* req == NULL for unsolicited interrupts */
4681 /* dump the Channel Program (max 140 Bytes per line) */
4682 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */
4683 first = req->cpaddr;
4684 for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++);
4685 to = min(first + 6, last);
4686 len = sprintf(page, PRINTK_HEADER
4687 " Related CP in req: %p\n", req);
4688 dasd_eckd_dump_ccw_range(first, to, page + len);
4689 printk(KERN_ERR "%s", page);
4691 /* print failing CCW area (maximum 4) */
4692 /* scsw->cda is either valid or zero */
4695 fail = (struct ccw1 *)(addr_t)
4696 irb->scsw.cmd.cpa; /* failing CCW */
4697 if (from < fail - 2) {
4698 from = fail - 2; /* there is a gap - print header */
4699 len += sprintf(page, PRINTK_HEADER "......\n");
4701 to = min(fail + 1, last);
4702 len += dasd_eckd_dump_ccw_range(from, to, page + len);
4704 /* print last CCWs (maximum 2) */
4705 from = max(from, ++to);
4706 if (from < last - 1) {
4707 from = last - 1; /* there is a gap - print header */
4708 len += sprintf(page + len, PRINTK_HEADER "......\n");
4710 len += dasd_eckd_dump_ccw_range(from, last, page + len);
4712 printk(KERN_ERR "%s", page);
4714 free_page((unsigned long) page);
4719 * Print sense data from a tcw.
4721 static void dasd_eckd_dump_sense_tcw(struct dasd_device *device,
4722 struct dasd_ccw_req *req, struct irb *irb)
4725 int len, sl, sct, residual;
4729 page = (char *) get_zeroed_page(GFP_ATOMIC);
4731 DBF_DEV_EVENT(DBF_WARNING, device, " %s",
4732 "No memory to dump sense data");
4735 /* dump the sense data */
4736 len = sprintf(page, PRINTK_HEADER
4737 " I/O status report for device %s:\n",
4738 dev_name(&device->cdev->dev));
4739 len += sprintf(page + len, PRINTK_HEADER
4740 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X "
4741 "CS:%02X fcxs:%02X schxs:%02X RC:%d\n",
4742 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw),
4743 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw),
4744 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw),
4746 (irb->scsw.tm.ifob << 7) | irb->scsw.tm.sesq,
4747 req ? req->intrc : 0);
4748 len += sprintf(page + len, PRINTK_HEADER
4749 " device %s: Failing TCW: %p\n",
4750 dev_name(&device->cdev->dev),
4751 (void *) (addr_t) irb->scsw.tm.tcw);
4755 if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01))
4757 (struct tcw *)(unsigned long)irb->scsw.tm.tcw);
4760 len += sprintf(page + len, PRINTK_HEADER
4761 " tsb->length %d\n", tsb->length);
4762 len += sprintf(page + len, PRINTK_HEADER
4763 " tsb->flags %x\n", tsb->flags);
4764 len += sprintf(page + len, PRINTK_HEADER
4765 " tsb->dcw_offset %d\n", tsb->dcw_offset);
4766 len += sprintf(page + len, PRINTK_HEADER
4767 " tsb->count %d\n", tsb->count);
4768 residual = tsb->count - 28;
4769 len += sprintf(page + len, PRINTK_HEADER
4770 " residual %d\n", residual);
4772 switch (tsb->flags & 0x07) {
4773 case 1: /* tsa_iostat */
4774 len += sprintf(page + len, PRINTK_HEADER
4775 " tsb->tsa.iostat.dev_time %d\n",
4776 tsb->tsa.iostat.dev_time);
4777 len += sprintf(page + len, PRINTK_HEADER
4778 " tsb->tsa.iostat.def_time %d\n",
4779 tsb->tsa.iostat.def_time);
4780 len += sprintf(page + len, PRINTK_HEADER
4781 " tsb->tsa.iostat.queue_time %d\n",
4782 tsb->tsa.iostat.queue_time);
4783 len += sprintf(page + len, PRINTK_HEADER
4784 " tsb->tsa.iostat.dev_busy_time %d\n",
4785 tsb->tsa.iostat.dev_busy_time);
4786 len += sprintf(page + len, PRINTK_HEADER
4787 " tsb->tsa.iostat.dev_act_time %d\n",
4788 tsb->tsa.iostat.dev_act_time);
4789 sense = tsb->tsa.iostat.sense;
4791 case 2: /* ts_ddpc */
4792 len += sprintf(page + len, PRINTK_HEADER
4793 " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc);
4794 for (sl = 0; sl < 2; sl++) {
4795 len += sprintf(page + len, PRINTK_HEADER
4796 " tsb->tsa.ddpc.rcq %2d-%2d: ",
4797 (8 * sl), ((8 * sl) + 7));
4798 rcq = tsb->tsa.ddpc.rcq;
4799 for (sct = 0; sct < 8; sct++) {
4800 len += sprintf(page + len, " %02x",
4803 len += sprintf(page + len, "\n");
4805 sense = tsb->tsa.ddpc.sense;
4807 case 3: /* tsa_intrg */
4808 len += sprintf(page + len, PRINTK_HEADER
4809 " tsb->tsa.intrg.: not supported yet\n");
4814 for (sl = 0; sl < 4; sl++) {
4815 len += sprintf(page + len, PRINTK_HEADER
4816 " Sense(hex) %2d-%2d:",
4817 (8 * sl), ((8 * sl) + 7));
4818 for (sct = 0; sct < 8; sct++) {
4819 len += sprintf(page + len, " %02x",
4820 sense[8 * sl + sct]);
4822 len += sprintf(page + len, "\n");
4825 if (sense[27] & DASD_SENSE_BIT_0) {
4826 /* 24 Byte Sense Data */
4827 sprintf(page + len, PRINTK_HEADER
4828 " 24 Byte: %x MSG %x, "
4829 "%s MSGb to SYSOP\n",
4830 sense[7] >> 4, sense[7] & 0x0f,
4831 sense[1] & 0x10 ? "" : "no");
4833 /* 32 Byte Sense Data */
4834 sprintf(page + len, PRINTK_HEADER
4835 " 32 Byte: Format: %x "
4836 "Exception class %x\n",
4837 sense[6] & 0x0f, sense[22] >> 4);
4840 sprintf(page + len, PRINTK_HEADER
4841 " SORRY - NO VALID SENSE AVAILABLE\n");
4844 sprintf(page + len, PRINTK_HEADER
4845 " SORRY - NO TSB DATA AVAILABLE\n");
4847 printk(KERN_ERR "%s", page);
4848 free_page((unsigned long) page);
4851 static void dasd_eckd_dump_sense(struct dasd_device *device,
4852 struct dasd_ccw_req *req, struct irb *irb)
4854 u8 *sense = dasd_get_sense(irb);
4856 if (scsw_is_tm(&irb->scsw)) {
4858 * In some cases the 'File Protected' or 'Incorrect Length'
4859 * error might be expected and log messages shouldn't be written
4860 * then. Check if the according suppress bit is set.
4862 if (sense && (sense[1] & SNS1_FILE_PROTECTED) &&
4863 test_bit(DASD_CQR_SUPPRESS_FP, &req->flags))
4865 if (scsw_cstat(&irb->scsw) == 0x40 &&
4866 test_bit(DASD_CQR_SUPPRESS_IL, &req->flags))
4869 dasd_eckd_dump_sense_tcw(device, req, irb);
4872 * In some cases the 'Command Reject' or 'No Record Found'
4873 * error might be expected and log messages shouldn't be
4874 * written then. Check if the according suppress bit is set.
4876 if (sense && sense[0] & SNS0_CMD_REJECT &&
4877 test_bit(DASD_CQR_SUPPRESS_CR, &req->flags))
4880 if (sense && sense[1] & SNS1_NO_REC_FOUND &&
4881 test_bit(DASD_CQR_SUPPRESS_NRF, &req->flags))
4884 dasd_eckd_dump_sense_ccw(device, req, irb);
4888 static int dasd_eckd_pm_freeze(struct dasd_device *device)
4891 * the device should be disconnected from our LCU structure
4892 * on restore we will reconnect it and reread LCU specific
4893 * information like PAV support that might have changed
4895 dasd_alias_remove_device(device);
4896 dasd_alias_disconnect_device_from_lcu(device);
4901 static int dasd_eckd_restore_device(struct dasd_device *device)
4903 struct dasd_eckd_private *private = device->private;
4904 struct dasd_eckd_characteristics temp_rdc_data;
4906 struct dasd_uid temp_uid;
4907 unsigned long flags;
4908 unsigned long cqr_flags = 0;
4910 /* Read Configuration Data */
4911 rc = dasd_eckd_read_conf(device);
4913 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
4914 "Read configuration data failed, rc=%d", rc);
4918 dasd_eckd_get_uid(device, &temp_uid);
4919 /* Generate device unique id */
4920 rc = dasd_eckd_generate_uid(device);
4921 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
4922 if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0)
4923 dev_err(&device->cdev->dev, "The UID of the DASD has "
4925 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
4929 /* register lcu with alias handling, enable PAV if this is a new lcu */
4930 rc = dasd_alias_make_device_known_to_lcu(device);
4934 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags);
4935 dasd_eckd_validate_server(device, cqr_flags);
4937 /* RE-Read Configuration Data */
4938 rc = dasd_eckd_read_conf(device);
4940 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
4941 "Read configuration data failed, rc=%d", rc);
4945 /* Read Feature Codes */
4946 dasd_eckd_read_features(device);
4948 /* Read Device Characteristics */
4949 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
4950 &temp_rdc_data, 64);
4952 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
4953 "Read device characteristic failed, rc=%d", rc);
4956 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
4957 memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data));
4958 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
4960 /* add device to alias management */
4961 dasd_alias_add_device(device);
4966 dasd_alias_disconnect_device_from_lcu(device);
4971 static int dasd_eckd_reload_device(struct dasd_device *device)
4973 struct dasd_eckd_private *private = device->private;
4976 struct dasd_uid uid;
4977 unsigned long flags;
4980 * remove device from alias handling to prevent new requests
4981 * from being scheduled on the wrong alias device
4983 dasd_alias_remove_device(device);
4985 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
4986 old_base = private->uid.base_unit_addr;
4987 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
4989 /* Read Configuration Data */
4990 rc = dasd_eckd_read_conf(device);
4994 rc = dasd_eckd_generate_uid(device);
4998 * update unit address configuration and
4999 * add device to alias management
5001 dasd_alias_update_add_device(device);
5003 dasd_eckd_get_uid(device, &uid);
5005 if (old_base != uid.base_unit_addr) {
5006 if (strlen(uid.vduit) > 0)
5007 snprintf(print_uid, sizeof(print_uid),
5008 "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial,
5009 uid.ssid, uid.base_unit_addr, uid.vduit);
5011 snprintf(print_uid, sizeof(print_uid),
5012 "%s.%s.%04x.%02x", uid.vendor, uid.serial,
5013 uid.ssid, uid.base_unit_addr);
5015 dev_info(&device->cdev->dev,
5016 "An Alias device was reassigned to a new base device "
5017 "with UID: %s\n", print_uid);
5025 static int dasd_eckd_read_message_buffer(struct dasd_device *device,
5026 struct dasd_rssd_messages *messages,
5029 struct dasd_rssd_messages *message_buf;
5030 struct dasd_psf_prssd_data *prssdp;
5031 struct dasd_ccw_req *cqr;
5035 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
5036 (sizeof(struct dasd_psf_prssd_data) +
5037 sizeof(struct dasd_rssd_messages)),
5040 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
5041 "Could not allocate read message buffer request");
5042 return PTR_ERR(cqr);
5047 cqr->startdev = device;
5048 cqr->memdev = device;
5050 cqr->expires = 10 * HZ;
5051 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags);
5052 /* dasd_sleep_on_immediatly does not do complex error
5053 * recovery so clear erp flag and set retry counter to
5055 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
5058 /* Prepare for Read Subsystem Data */
5059 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
5060 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
5061 prssdp->order = PSF_ORDER_PRSSD;
5062 prssdp->suborder = 0x03; /* Message Buffer */
5063 /* all other bytes of prssdp must be zero */
5066 ccw->cmd_code = DASD_ECKD_CCW_PSF;
5067 ccw->count = sizeof(struct dasd_psf_prssd_data);
5068 ccw->flags |= CCW_FLAG_CC;
5069 ccw->flags |= CCW_FLAG_SLI;
5070 ccw->cda = (__u32)(addr_t) prssdp;
5072 /* Read Subsystem Data - message buffer */
5073 message_buf = (struct dasd_rssd_messages *) (prssdp + 1);
5074 memset(message_buf, 0, sizeof(struct dasd_rssd_messages));
5077 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
5078 ccw->count = sizeof(struct dasd_rssd_messages);
5079 ccw->flags |= CCW_FLAG_SLI;
5080 ccw->cda = (__u32)(addr_t) message_buf;
5082 cqr->buildclk = get_tod_clock();
5083 cqr->status = DASD_CQR_FILLED;
5084 rc = dasd_sleep_on_immediatly(cqr);
5086 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
5087 message_buf = (struct dasd_rssd_messages *)
5089 memcpy(messages, message_buf,
5090 sizeof(struct dasd_rssd_messages));
5091 } else if (cqr->lpm) {
5093 * on z/VM we might not be able to do I/O on the requested path
5094 * but instead we get the required information on any path
5095 * so retry with open path mask
5100 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
5101 "Reading messages failed with rc=%d\n"
5103 dasd_sfree_request(cqr, cqr->memdev);
5107 static int dasd_eckd_query_host_access(struct dasd_device *device,
5108 struct dasd_psf_query_host_access *data)
5110 struct dasd_eckd_private *private = device->private;
5111 struct dasd_psf_query_host_access *host_access;
5112 struct dasd_psf_prssd_data *prssdp;
5113 struct dasd_ccw_req *cqr;
5117 /* not available for HYPER PAV alias devices */
5118 if (!device->block && private->lcu->pav == HYPER_PAV)
5121 /* may not be supported by the storage server */
5122 if (!(private->features.feature[14] & 0x80))
5125 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
5126 sizeof(struct dasd_psf_prssd_data) + 1,
5129 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
5130 "Could not allocate read message buffer request");
5131 return PTR_ERR(cqr);
5133 host_access = kzalloc(sizeof(*host_access), GFP_KERNEL | GFP_DMA);
5135 dasd_sfree_request(cqr, device);
5136 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
5137 "Could not allocate host_access buffer");
5140 cqr->startdev = device;
5141 cqr->memdev = device;
5144 cqr->expires = 10 * HZ;
5146 /* Prepare for Read Subsystem Data */
5147 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
5148 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
5149 prssdp->order = PSF_ORDER_PRSSD;
5150 prssdp->suborder = PSF_SUBORDER_QHA; /* query host access */
5151 /* LSS and Volume that will be queried */
5152 prssdp->lss = private->ned->ID;
5153 prssdp->volume = private->ned->unit_addr;
5154 /* all other bytes of prssdp must be zero */
5157 ccw->cmd_code = DASD_ECKD_CCW_PSF;
5158 ccw->count = sizeof(struct dasd_psf_prssd_data);
5159 ccw->flags |= CCW_FLAG_CC;
5160 ccw->flags |= CCW_FLAG_SLI;
5161 ccw->cda = (__u32)(addr_t) prssdp;
5163 /* Read Subsystem Data - query host access */
5165 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
5166 ccw->count = sizeof(struct dasd_psf_query_host_access);
5167 ccw->flags |= CCW_FLAG_SLI;
5168 ccw->cda = (__u32)(addr_t) host_access;
5170 cqr->buildclk = get_tod_clock();
5171 cqr->status = DASD_CQR_FILLED;
5172 /* the command might not be supported, suppress error message */
5173 __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags);
5174 rc = dasd_sleep_on_interruptible(cqr);
5176 *data = *host_access;
5178 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
5179 "Reading host access data failed with rc=%d\n",
5184 dasd_sfree_request(cqr, cqr->memdev);
5189 * return number of grouped devices
5191 static int dasd_eckd_host_access_count(struct dasd_device *device)
5193 struct dasd_psf_query_host_access *access;
5194 struct dasd_ckd_path_group_entry *entry;
5195 struct dasd_ckd_host_information *info;
5199 access = kzalloc(sizeof(*access), GFP_NOIO);
5201 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
5202 "Could not allocate access buffer");
5205 rc = dasd_eckd_query_host_access(device, access);
5211 info = (struct dasd_ckd_host_information *)
5212 access->host_access_information;
5213 for (i = 0; i < info->entry_count; i++) {
5214 entry = (struct dasd_ckd_path_group_entry *)
5215 (info->entry + i * info->entry_size);
5216 if (entry->status_flags & DASD_ECKD_PG_GROUPED)
5225 * write host access information to a sequential file
5227 static int dasd_hosts_print(struct dasd_device *device, struct seq_file *m)
5229 struct dasd_psf_query_host_access *access;
5230 struct dasd_ckd_path_group_entry *entry;
5231 struct dasd_ckd_host_information *info;
5232 char sysplex[9] = "";
5235 access = kzalloc(sizeof(*access), GFP_NOIO);
5237 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
5238 "Could not allocate access buffer");
5241 rc = dasd_eckd_query_host_access(device, access);
5247 info = (struct dasd_ckd_host_information *)
5248 access->host_access_information;
5249 for (i = 0; i < info->entry_count; i++) {
5250 entry = (struct dasd_ckd_path_group_entry *)
5251 (info->entry + i * info->entry_size);
5253 seq_puts(m, "pgid ");
5254 for (j = 0; j < 11; j++)
5255 seq_printf(m, "%02x", entry->pgid[j]);
5258 seq_printf(m, "status_flags %02x\n", entry->status_flags);
5260 memcpy(&sysplex, &entry->sysplex_name, sizeof(sysplex) - 1);
5261 EBCASC(sysplex, sizeof(sysplex));
5262 seq_printf(m, "sysplex_name %8s\n", sysplex);
5263 /* SUPPORTED CYLINDER */
5264 seq_printf(m, "supported_cylinder %d\n", entry->cylinder);
5266 seq_printf(m, "timestamp %lu\n", (unsigned long)
5275 * Perform Subsystem Function - CUIR response
5278 dasd_eckd_psf_cuir_response(struct dasd_device *device, int response,
5279 __u32 message_id, __u8 lpum)
5281 struct dasd_psf_cuir_response *psf_cuir;
5282 int pos = pathmask_to_pos(lpum);
5283 struct dasd_ccw_req *cqr;
5287 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ ,
5288 sizeof(struct dasd_psf_cuir_response),
5292 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
5293 "Could not allocate PSF-CUIR request");
5294 return PTR_ERR(cqr);
5297 psf_cuir = (struct dasd_psf_cuir_response *)cqr->data;
5298 psf_cuir->order = PSF_ORDER_CUIR_RESPONSE;
5299 psf_cuir->cc = response;
5300 psf_cuir->chpid = device->path[pos].chpid;
5301 psf_cuir->message_id = message_id;
5302 psf_cuir->cssid = device->path[pos].cssid;
5303 psf_cuir->ssid = device->path[pos].ssid;
5305 ccw->cmd_code = DASD_ECKD_CCW_PSF;
5306 ccw->cda = (__u32)(addr_t)psf_cuir;
5307 ccw->flags = CCW_FLAG_SLI;
5308 ccw->count = sizeof(struct dasd_psf_cuir_response);
5310 cqr->startdev = device;
5311 cqr->memdev = device;
5314 cqr->expires = 10*HZ;
5315 cqr->buildclk = get_tod_clock();
5316 cqr->status = DASD_CQR_FILLED;
5317 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags);
5319 rc = dasd_sleep_on(cqr);
5321 dasd_sfree_request(cqr, cqr->memdev);
5326 * return configuration data that is referenced by record selector
5327 * if a record selector is specified or per default return the
5328 * conf_data pointer for the path specified by lpum
5330 static struct dasd_conf_data *dasd_eckd_get_ref_conf(struct dasd_device *device,
5332 struct dasd_cuir_message *cuir)
5334 struct dasd_conf_data *conf_data;
5337 if (cuir->record_selector == 0)
5339 for (path = 0x80, pos = 0; path; path >>= 1, pos++) {
5340 conf_data = device->path[pos].conf_data;
5341 if (conf_data->gneq.record_selector ==
5342 cuir->record_selector)
5346 return device->path[pathmask_to_pos(lpum)].conf_data;
5350 * This function determines the scope of a reconfiguration request by
5351 * analysing the path and device selection data provided in the CUIR request.
5352 * Returns a path mask containing CUIR affected paths for the give device.
5354 * If the CUIR request does not contain the required information return the
5355 * path mask of the path the attention message for the CUIR request was reveived
5358 static int dasd_eckd_cuir_scope(struct dasd_device *device, __u8 lpum,
5359 struct dasd_cuir_message *cuir)
5361 struct dasd_conf_data *ref_conf_data;
5362 unsigned long bitmask = 0, mask = 0;
5363 struct dasd_conf_data *conf_data;
5364 unsigned int pos, path;
5365 char *ref_gneq, *gneq;
5366 char *ref_ned, *ned;
5369 /* if CUIR request does not specify the scope use the path
5370 the attention message was presented on */
5371 if (!cuir->ned_map ||
5372 !(cuir->neq_map[0] | cuir->neq_map[1] | cuir->neq_map[2]))
5375 /* get reference conf data */
5376 ref_conf_data = dasd_eckd_get_ref_conf(device, lpum, cuir);
5377 /* reference ned is determined by ned_map field */
5378 pos = 8 - ffs(cuir->ned_map);
5379 ref_ned = (char *)&ref_conf_data->neds[pos];
5380 ref_gneq = (char *)&ref_conf_data->gneq;
5381 /* transfer 24 bit neq_map to mask */
5382 mask = cuir->neq_map[2];
5383 mask |= cuir->neq_map[1] << 8;
5384 mask |= cuir->neq_map[0] << 16;
5386 for (path = 0; path < 8; path++) {
5387 /* initialise data per path */
5389 conf_data = device->path[path].conf_data;
5390 pos = 8 - ffs(cuir->ned_map);
5391 ned = (char *) &conf_data->neds[pos];
5392 /* compare reference ned and per path ned */
5393 if (memcmp(ref_ned, ned, sizeof(*ned)) != 0)
5395 gneq = (char *)&conf_data->gneq;
5396 /* compare reference gneq and per_path gneq under
5397 24 bit mask where mask bit 0 equals byte 7 of
5398 the gneq and mask bit 24 equals byte 31 */
5400 pos = ffs(bitmask) - 1;
5401 if (memcmp(&ref_gneq[31 - pos], &gneq[31 - pos], 1)
5404 clear_bit(pos, &bitmask);
5408 /* device and path match the reference values
5409 add path to CUIR scope */
5410 tbcpm |= 0x80 >> path;
5415 static void dasd_eckd_cuir_notify_user(struct dasd_device *device,
5416 unsigned long paths, int action)
5421 /* get position of bit in mask */
5422 pos = 8 - ffs(paths);
5423 /* get channel path descriptor from this position */
5424 if (action == CUIR_QUIESCE)
5425 pr_warn("Service on the storage server caused path %x.%02x to go offline",
5426 device->path[pos].cssid,
5427 device->path[pos].chpid);
5428 else if (action == CUIR_RESUME)
5429 pr_info("Path %x.%02x is back online after service on the storage server",
5430 device->path[pos].cssid,
5431 device->path[pos].chpid);
5432 clear_bit(7 - pos, &paths);
5436 static int dasd_eckd_cuir_remove_path(struct dasd_device *device, __u8 lpum,
5437 struct dasd_cuir_message *cuir)
5439 unsigned long tbcpm;
5441 tbcpm = dasd_eckd_cuir_scope(device, lpum, cuir);
5442 /* nothing to do if path is not in use */
5443 if (!(dasd_path_get_opm(device) & tbcpm))
5445 if (!(dasd_path_get_opm(device) & ~tbcpm)) {
5446 /* no path would be left if the CUIR action is taken
5450 /* remove device from operational path mask */
5451 dasd_path_remove_opm(device, tbcpm);
5452 dasd_path_add_cuirpm(device, tbcpm);
5457 * walk through all devices and build a path mask to quiesce them
5458 * return an error if the last path to a device would be removed
5460 * if only part of the devices are quiesced and an error
5461 * occurs no onlining necessary, the storage server will
5462 * notify the already set offline devices again
5464 static int dasd_eckd_cuir_quiesce(struct dasd_device *device, __u8 lpum,
5465 struct dasd_cuir_message *cuir)
5467 struct dasd_eckd_private *private = device->private;
5468 struct alias_pav_group *pavgroup, *tempgroup;
5469 struct dasd_device *dev, *n;
5470 unsigned long paths = 0;
5471 unsigned long flags;
5474 /* active devices */
5475 list_for_each_entry_safe(dev, n, &private->lcu->active_devices,
5477 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
5478 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
5479 spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags);
5484 /* inactive devices */
5485 list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices,
5487 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
5488 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
5489 spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags);
5494 /* devices in PAV groups */
5495 list_for_each_entry_safe(pavgroup, tempgroup,
5496 &private->lcu->grouplist, group) {
5497 list_for_each_entry_safe(dev, n, &pavgroup->baselist,
5499 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
5500 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
5501 spin_unlock_irqrestore(
5502 get_ccwdev_lock(dev->cdev), flags);
5507 list_for_each_entry_safe(dev, n, &pavgroup->aliaslist,
5509 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
5510 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
5511 spin_unlock_irqrestore(
5512 get_ccwdev_lock(dev->cdev), flags);
5518 /* notify user about all paths affected by CUIR action */
5519 dasd_eckd_cuir_notify_user(device, paths, CUIR_QUIESCE);
5525 static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum,
5526 struct dasd_cuir_message *cuir)
5528 struct dasd_eckd_private *private = device->private;
5529 struct alias_pav_group *pavgroup, *tempgroup;
5530 struct dasd_device *dev, *n;
5531 unsigned long paths = 0;
5535 * the path may have been added through a generic path event before
5536 * only trigger path verification if the path is not already in use
5538 list_for_each_entry_safe(dev, n,
5539 &private->lcu->active_devices,
5541 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
5543 if (!(dasd_path_get_opm(dev) & tbcpm)) {
5544 dasd_path_add_tbvpm(dev, tbcpm);
5545 dasd_schedule_device_bh(dev);
5548 list_for_each_entry_safe(dev, n,
5549 &private->lcu->inactive_devices,
5551 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
5553 if (!(dasd_path_get_opm(dev) & tbcpm)) {
5554 dasd_path_add_tbvpm(dev, tbcpm);
5555 dasd_schedule_device_bh(dev);
5558 /* devices in PAV groups */
5559 list_for_each_entry_safe(pavgroup, tempgroup,
5560 &private->lcu->grouplist,
5562 list_for_each_entry_safe(dev, n,
5563 &pavgroup->baselist,
5565 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
5567 if (!(dasd_path_get_opm(dev) & tbcpm)) {
5568 dasd_path_add_tbvpm(dev, tbcpm);
5569 dasd_schedule_device_bh(dev);
5572 list_for_each_entry_safe(dev, n,
5573 &pavgroup->aliaslist,
5575 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
5577 if (!(dasd_path_get_opm(dev) & tbcpm)) {
5578 dasd_path_add_tbvpm(dev, tbcpm);
5579 dasd_schedule_device_bh(dev);
5583 /* notify user about all paths affected by CUIR action */
5584 dasd_eckd_cuir_notify_user(device, paths, CUIR_RESUME);
5588 static void dasd_eckd_handle_cuir(struct dasd_device *device, void *messages,
5591 struct dasd_cuir_message *cuir = messages;
5594 DBF_DEV_EVENT(DBF_WARNING, device,
5595 "CUIR request: %016llx %016llx %016llx %08x",
5596 ((u64 *)cuir)[0], ((u64 *)cuir)[1], ((u64 *)cuir)[2],
5599 if (cuir->code == CUIR_QUIESCE) {
5601 if (dasd_eckd_cuir_quiesce(device, lpum, cuir))
5602 response = PSF_CUIR_LAST_PATH;
5604 response = PSF_CUIR_COMPLETED;
5605 } else if (cuir->code == CUIR_RESUME) {
5607 dasd_eckd_cuir_resume(device, lpum, cuir);
5608 response = PSF_CUIR_COMPLETED;
5610 response = PSF_CUIR_NOT_SUPPORTED;
5612 dasd_eckd_psf_cuir_response(device, response,
5613 cuir->message_id, lpum);
5614 DBF_DEV_EVENT(DBF_WARNING, device,
5615 "CUIR response: %d on message ID %08x", response,
5617 /* to make sure there is no attention left schedule work again */
5618 device->discipline->check_attention(device, lpum);
5621 static void dasd_eckd_check_attention_work(struct work_struct *work)
5623 struct check_attention_work_data *data;
5624 struct dasd_rssd_messages *messages;
5625 struct dasd_device *device;
5628 data = container_of(work, struct check_attention_work_data, worker);
5629 device = data->device;
5630 messages = kzalloc(sizeof(*messages), GFP_KERNEL);
5632 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
5633 "Could not allocate attention message buffer");
5636 rc = dasd_eckd_read_message_buffer(device, messages, data->lpum);
5639 if (messages->length == ATTENTION_LENGTH_CUIR &&
5640 messages->format == ATTENTION_FORMAT_CUIR)
5641 dasd_eckd_handle_cuir(device, messages, data->lpum);
5643 dasd_put_device(device);
5648 static int dasd_eckd_check_attention(struct dasd_device *device, __u8 lpum)
5650 struct check_attention_work_data *data;
5652 data = kzalloc(sizeof(*data), GFP_ATOMIC);
5655 INIT_WORK(&data->worker, dasd_eckd_check_attention_work);
5656 dasd_get_device(device);
5657 data->device = device;
5659 schedule_work(&data->worker);
5663 static int dasd_eckd_disable_hpf_path(struct dasd_device *device, __u8 lpum)
5665 if (~lpum & dasd_path_get_opm(device)) {
5666 dasd_path_add_nohpfpm(device, lpum);
5667 dasd_path_remove_opm(device, lpum);
5668 dev_err(&device->cdev->dev,
5669 "Channel path %02X lost HPF functionality and is disabled\n",
5676 static void dasd_eckd_disable_hpf_device(struct dasd_device *device)
5678 struct dasd_eckd_private *private = device->private;
5680 dev_err(&device->cdev->dev,
5681 "High Performance FICON disabled\n");
5682 private->fcx_max_data = 0;
5685 static int dasd_eckd_hpf_enabled(struct dasd_device *device)
5687 struct dasd_eckd_private *private = device->private;
5689 return private->fcx_max_data ? 1 : 0;
5692 static void dasd_eckd_handle_hpf_error(struct dasd_device *device,
5695 struct dasd_eckd_private *private = device->private;
5697 if (!private->fcx_max_data) {
5698 /* sanity check for no HPF, the error makes no sense */
5699 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
5700 "Trying to disable HPF for a non HPF device");
5703 if (irb->scsw.tm.sesq == SCSW_SESQ_DEV_NOFCX) {
5704 dasd_eckd_disable_hpf_device(device);
5705 } else if (irb->scsw.tm.sesq == SCSW_SESQ_PATH_NOFCX) {
5706 if (dasd_eckd_disable_hpf_path(device, irb->esw.esw1.lpum))
5708 dasd_eckd_disable_hpf_device(device);
5709 dasd_path_set_tbvpm(device,
5710 dasd_path_get_hpfpm(device));
5713 * prevent that any new I/O ist started on the device and schedule a
5714 * requeue of existing requests
5716 dasd_device_set_stop_bits(device, DASD_STOPPED_NOT_ACC);
5717 dasd_schedule_requeue(device);
5720 static struct ccw_driver dasd_eckd_driver = {
5722 .name = "dasd-eckd",
5723 .owner = THIS_MODULE,
5725 .ids = dasd_eckd_ids,
5726 .probe = dasd_eckd_probe,
5727 .remove = dasd_generic_remove,
5728 .set_offline = dasd_generic_set_offline,
5729 .set_online = dasd_eckd_set_online,
5730 .notify = dasd_generic_notify,
5731 .path_event = dasd_generic_path_event,
5732 .shutdown = dasd_generic_shutdown,
5733 .freeze = dasd_generic_pm_freeze,
5734 .thaw = dasd_generic_restore_device,
5735 .restore = dasd_generic_restore_device,
5736 .uc_handler = dasd_generic_uc_handler,
5737 .int_class = IRQIO_DAS,
5741 * max_blocks is dependent on the amount of storage that is available
5742 * in the static io buffer for each device. Currently each device has
5743 * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has
5744 * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use
5745 * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In
5746 * addition we have one define extent ccw + 16 bytes of data and one
5747 * locate record ccw + 16 bytes of data. That makes:
5748 * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum.
5749 * We want to fit two into the available memory so that we can immediately
5750 * start the next request if one finishes off. That makes 249.5 blocks
5751 * for one request. Give a little safety and the result is 240.
5753 static struct dasd_discipline dasd_eckd_discipline = {
5754 .owner = THIS_MODULE,
5758 .check_device = dasd_eckd_check_characteristics,
5759 .uncheck_device = dasd_eckd_uncheck_device,
5760 .do_analysis = dasd_eckd_do_analysis,
5761 .verify_path = dasd_eckd_verify_path,
5762 .basic_to_ready = dasd_eckd_basic_to_ready,
5763 .online_to_ready = dasd_eckd_online_to_ready,
5764 .basic_to_known = dasd_eckd_basic_to_known,
5765 .fill_geometry = dasd_eckd_fill_geometry,
5766 .start_IO = dasd_start_IO,
5767 .term_IO = dasd_term_IO,
5768 .handle_terminated_request = dasd_eckd_handle_terminated_request,
5769 .format_device = dasd_eckd_format_device,
5770 .check_device_format = dasd_eckd_check_device_format,
5771 .erp_action = dasd_eckd_erp_action,
5772 .erp_postaction = dasd_eckd_erp_postaction,
5773 .check_for_device_change = dasd_eckd_check_for_device_change,
5774 .build_cp = dasd_eckd_build_alias_cp,
5775 .free_cp = dasd_eckd_free_alias_cp,
5776 .dump_sense = dasd_eckd_dump_sense,
5777 .dump_sense_dbf = dasd_eckd_dump_sense_dbf,
5778 .fill_info = dasd_eckd_fill_info,
5779 .ioctl = dasd_eckd_ioctl,
5780 .freeze = dasd_eckd_pm_freeze,
5781 .restore = dasd_eckd_restore_device,
5782 .reload = dasd_eckd_reload_device,
5783 .get_uid = dasd_eckd_get_uid,
5784 .kick_validate = dasd_eckd_kick_validate_server,
5785 .check_attention = dasd_eckd_check_attention,
5786 .host_access_count = dasd_eckd_host_access_count,
5787 .hosts_print = dasd_hosts_print,
5788 .handle_hpf_error = dasd_eckd_handle_hpf_error,
5789 .disable_hpf = dasd_eckd_disable_hpf_device,
5790 .hpf_enabled = dasd_eckd_hpf_enabled,
5791 .reset_path = dasd_eckd_reset_path,
5795 dasd_eckd_init(void)
5799 ASCEBC(dasd_eckd_discipline.ebcname, 4);
5800 dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req),
5801 GFP_KERNEL | GFP_DMA);
5802 if (!dasd_reserve_req)
5804 path_verification_worker = kmalloc(sizeof(*path_verification_worker),
5805 GFP_KERNEL | GFP_DMA);
5806 if (!path_verification_worker) {
5807 kfree(dasd_reserve_req);
5810 rawpadpage = (void *)__get_free_page(GFP_KERNEL);
5812 kfree(path_verification_worker);
5813 kfree(dasd_reserve_req);
5816 ret = ccw_driver_register(&dasd_eckd_driver);
5818 wait_for_device_probe();
5820 kfree(path_verification_worker);
5821 kfree(dasd_reserve_req);
5822 free_page((unsigned long)rawpadpage);
5828 dasd_eckd_cleanup(void)
5830 ccw_driver_unregister(&dasd_eckd_driver);
5831 kfree(path_verification_worker);
5832 kfree(dasd_reserve_req);
5833 free_page((unsigned long)rawpadpage);
5836 module_init(dasd_eckd_init);
5837 module_exit(dasd_eckd_cleanup);