2 * File...........: linux/drivers/s390/block/dasd_eckd.c
3 * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
4 * Horst Hummel <Horst.Hummel@de.ibm.com>
5 * Carsten Otte <Cotte@de.ibm.com>
6 * Martin Schwidefsky <schwidefsky@de.ibm.com>
7 * Bugreports.to..: <Linux390@de.ibm.com>
8 * Copyright IBM Corp. 1999, 2009
9 * EMC Symmetrix ioctl Copyright EMC Corporation, 2008
10 * Author.........: Nigel Hislop <hislop_nigel@emc.com>
13 #define KMSG_COMPONENT "dasd-eckd"
15 #include <linux/stddef.h>
16 #include <linux/kernel.h>
17 #include <linux/slab.h>
18 #include <linux/hdreg.h> /* HDIO_GETGEO */
19 #include <linux/bio.h>
20 #include <linux/module.h>
21 #include <linux/init.h>
23 #include <asm/debug.h>
24 #include <asm/idals.h>
25 #include <asm/ebcdic.h>
26 #include <asm/compat.h>
28 #include <asm/uaccess.h>
30 #include <asm/ccwdev.h>
34 #include "dasd_eckd.h"
35 #include "../cio/chsc.h"
40 #endif /* PRINTK_HEADER */
41 #define PRINTK_HEADER "dasd(eckd):"
43 #define ECKD_C0(i) (i->home_bytes)
44 #define ECKD_F(i) (i->formula)
45 #define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\
46 (i->factors.f_0x02.f1))
47 #define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\
48 (i->factors.f_0x02.f2))
49 #define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\
50 (i->factors.f_0x02.f3))
51 #define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0)
52 #define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0)
53 #define ECKD_F6(i) (i->factor6)
54 #define ECKD_F7(i) (i->factor7)
55 #define ECKD_F8(i) (i->factor8)
58 * raw track access always map to 64k in memory
59 * so it maps to 16 blocks of 4k per track
61 #define DASD_RAW_BLOCK_PER_TRACK 16
62 #define DASD_RAW_BLOCKSIZE 4096
63 /* 64k are 128 x 512 byte sectors */
64 #define DASD_RAW_SECTORS_PER_TRACK 128
66 MODULE_LICENSE("GPL");
68 static struct dasd_discipline dasd_eckd_discipline;
70 /* The ccw bus type uses this table to find devices that it sends to
72 static struct ccw_device_id dasd_eckd_ids[] = {
73 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1},
74 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2},
75 { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3380, 0), .driver_info = 0x3},
76 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4},
77 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5},
78 { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6},
79 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7},
80 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8},
81 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9},
82 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa},
83 { /* end of list */ },
86 MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids);
88 static struct ccw_driver dasd_eckd_driver; /* see below */
91 #define INIT_CQR_UNFORMATTED 1
92 #define INIT_CQR_ERROR 2
94 /* emergency request for reserve/release */
96 struct dasd_ccw_req cqr;
100 static DEFINE_MUTEX(dasd_reserve_mutex);
102 /* definitions for the path verification worker */
103 struct path_verification_work_data {
104 struct work_struct worker;
105 struct dasd_device *device;
106 struct dasd_ccw_req cqr;
108 __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE];
112 static struct path_verification_work_data *path_verification_worker;
113 static DEFINE_MUTEX(dasd_path_verification_mutex);
115 /* initial attempt at a probe function. this can be simplified once
116 * the other detection code is gone */
118 dasd_eckd_probe (struct ccw_device *cdev)
122 /* set ECKD specific ccw-device options */
123 ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE |
124 CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH);
126 DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s",
127 "dasd_eckd_probe: could not set "
128 "ccw-device options");
131 ret = dasd_generic_probe(cdev, &dasd_eckd_discipline);
136 dasd_eckd_set_online(struct ccw_device *cdev)
138 return dasd_generic_set_online(cdev, &dasd_eckd_discipline);
141 static const int sizes_trk0[] = { 28, 148, 84 };
142 #define LABEL_SIZE 140
144 static inline unsigned int
145 round_up_multiple(unsigned int no, unsigned int mult)
148 return (rem ? no - rem + mult : no);
151 static inline unsigned int
152 ceil_quot(unsigned int d1, unsigned int d2)
154 return (d1 + (d2 - 1)) / d2;
158 recs_per_track(struct dasd_eckd_characteristics * rdc,
159 unsigned int kl, unsigned int dl)
163 switch (rdc->dev_type) {
166 return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) +
167 ceil_quot(dl + 12, 32));
169 return 1499 / (15 + ceil_quot(dl + 12, 32));
171 dn = ceil_quot(dl + 6, 232) + 1;
173 kn = ceil_quot(kl + 6, 232) + 1;
174 return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) +
175 9 + ceil_quot(dl + 6 * dn, 34));
177 return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34));
179 dn = ceil_quot(dl + 6, 232) + 1;
181 kn = ceil_quot(kl + 6, 232) + 1;
182 return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) +
183 ceil_quot(dl + 6 * dn, 34));
185 return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34));
190 static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head)
192 geo->cyl = (__u16) cyl;
193 geo->head = cyl >> 16;
199 check_XRC (struct ccw1 *de_ccw,
200 struct DE_eckd_data *data,
201 struct dasd_device *device)
203 struct dasd_eckd_private *private;
206 private = (struct dasd_eckd_private *) device->private;
207 if (!private->rdc_data.facilities.XRC_supported)
210 /* switch on System Time Stamp - needed for XRC Support */
211 data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */
212 data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */
214 rc = get_sync_clock(&data->ep_sys_time);
215 /* Ignore return code if sync clock is switched off. */
216 if (rc == -ENOSYS || rc == -EACCES)
219 de_ccw->count = sizeof(struct DE_eckd_data);
220 de_ccw->flags |= CCW_FLAG_SLI;
225 define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk,
226 unsigned int totrk, int cmd, struct dasd_device *device)
228 struct dasd_eckd_private *private;
230 u16 heads, beghead, endhead;
233 private = (struct dasd_eckd_private *) device->private;
235 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT;
238 ccw->cda = (__u32) __pa(data);
240 memset(data, 0, sizeof(struct DE_eckd_data));
242 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
243 case DASD_ECKD_CCW_READ_RECORD_ZERO:
244 case DASD_ECKD_CCW_READ:
245 case DASD_ECKD_CCW_READ_MT:
246 case DASD_ECKD_CCW_READ_CKD:
247 case DASD_ECKD_CCW_READ_CKD_MT:
248 case DASD_ECKD_CCW_READ_KD:
249 case DASD_ECKD_CCW_READ_KD_MT:
250 case DASD_ECKD_CCW_READ_COUNT:
251 data->mask.perm = 0x1;
252 data->attributes.operation = private->attrib.operation;
254 case DASD_ECKD_CCW_WRITE:
255 case DASD_ECKD_CCW_WRITE_MT:
256 case DASD_ECKD_CCW_WRITE_KD:
257 case DASD_ECKD_CCW_WRITE_KD_MT:
258 data->mask.perm = 0x02;
259 data->attributes.operation = private->attrib.operation;
260 rc = check_XRC (ccw, data, device);
262 case DASD_ECKD_CCW_WRITE_CKD:
263 case DASD_ECKD_CCW_WRITE_CKD_MT:
264 data->attributes.operation = DASD_BYPASS_CACHE;
265 rc = check_XRC (ccw, data, device);
267 case DASD_ECKD_CCW_ERASE:
268 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
269 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
270 data->mask.perm = 0x3;
271 data->mask.auth = 0x1;
272 data->attributes.operation = DASD_BYPASS_CACHE;
273 rc = check_XRC (ccw, data, device);
276 dev_err(&device->cdev->dev,
277 "0x%x is not a known command\n", cmd);
281 data->attributes.mode = 0x3; /* ECKD */
283 if ((private->rdc_data.cu_type == 0x2105 ||
284 private->rdc_data.cu_type == 0x2107 ||
285 private->rdc_data.cu_type == 0x1750)
286 && !(private->uses_cdl && trk < 2))
287 data->ga_extended |= 0x40; /* Regular Data Format Mode */
289 heads = private->rdc_data.trk_per_cyl;
290 begcyl = trk / heads;
291 beghead = trk % heads;
292 endcyl = totrk / heads;
293 endhead = totrk % heads;
295 /* check for sequential prestage - enhance cylinder range */
296 if (data->attributes.operation == DASD_SEQ_PRESTAGE ||
297 data->attributes.operation == DASD_SEQ_ACCESS) {
299 if (endcyl + private->attrib.nr_cyl < private->real_cyl)
300 endcyl += private->attrib.nr_cyl;
302 endcyl = (private->real_cyl - 1);
305 set_ch_t(&data->beg_ext, begcyl, beghead);
306 set_ch_t(&data->end_ext, endcyl, endhead);
310 static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata,
311 struct dasd_device *device)
313 struct dasd_eckd_private *private;
316 private = (struct dasd_eckd_private *) device->private;
317 if (!private->rdc_data.facilities.XRC_supported)
320 /* switch on System Time Stamp - needed for XRC Support */
321 pfxdata->define_extent.ga_extended |= 0x08; /* 'Time Stamp Valid' */
322 pfxdata->define_extent.ga_extended |= 0x02; /* 'Extended Parameter' */
323 pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */
325 rc = get_sync_clock(&pfxdata->define_extent.ep_sys_time);
326 /* Ignore return code if sync clock is switched off. */
327 if (rc == -ENOSYS || rc == -EACCES)
332 static void fill_LRE_data(struct LRE_eckd_data *data, unsigned int trk,
333 unsigned int rec_on_trk, int count, int cmd,
334 struct dasd_device *device, unsigned int reclen,
337 struct dasd_eckd_private *private;
341 private = (struct dasd_eckd_private *) device->private;
343 memset(data, 0, sizeof(*data));
346 switch (private->rdc_data.dev_type) {
348 dn = ceil_quot(reclen + 6, 232);
349 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
350 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
353 d = 7 + ceil_quot(reclen + 12, 32);
354 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
358 data->sector = sector;
359 /* note: meaning of count depends on the operation
360 * for record based I/O it's the number of records, but for
361 * track based I/O it's the number of tracks
365 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
366 data->operation.orientation = 0x3;
367 data->operation.operation = 0x03;
369 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
370 data->operation.orientation = 0x3;
371 data->operation.operation = 0x16;
373 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
374 data->operation.orientation = 0x1;
375 data->operation.operation = 0x03;
378 case DASD_ECKD_CCW_READ_RECORD_ZERO:
379 data->operation.orientation = 0x3;
380 data->operation.operation = 0x16;
383 case DASD_ECKD_CCW_WRITE:
384 case DASD_ECKD_CCW_WRITE_MT:
385 case DASD_ECKD_CCW_WRITE_KD:
386 case DASD_ECKD_CCW_WRITE_KD_MT:
387 data->auxiliary.length_valid = 0x1;
388 data->length = reclen;
389 data->operation.operation = 0x01;
391 case DASD_ECKD_CCW_WRITE_CKD:
392 case DASD_ECKD_CCW_WRITE_CKD_MT:
393 data->auxiliary.length_valid = 0x1;
394 data->length = reclen;
395 data->operation.operation = 0x03;
397 case DASD_ECKD_CCW_WRITE_FULL_TRACK:
398 data->operation.orientation = 0x0;
399 data->operation.operation = 0x3F;
400 data->extended_operation = 0x11;
402 data->extended_parameter_length = 0x02;
403 if (data->count > 8) {
404 data->extended_parameter[0] = 0xFF;
405 data->extended_parameter[1] = 0xFF;
406 data->extended_parameter[1] <<= (16 - count);
408 data->extended_parameter[0] = 0xFF;
409 data->extended_parameter[0] <<= (8 - count);
410 data->extended_parameter[1] = 0x00;
414 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
415 data->auxiliary.length_valid = 0x1;
416 data->length = reclen; /* not tlf, as one might think */
417 data->operation.operation = 0x3F;
418 data->extended_operation = 0x23;
420 case DASD_ECKD_CCW_READ:
421 case DASD_ECKD_CCW_READ_MT:
422 case DASD_ECKD_CCW_READ_KD:
423 case DASD_ECKD_CCW_READ_KD_MT:
424 data->auxiliary.length_valid = 0x1;
425 data->length = reclen;
426 data->operation.operation = 0x06;
428 case DASD_ECKD_CCW_READ_CKD:
429 case DASD_ECKD_CCW_READ_CKD_MT:
430 data->auxiliary.length_valid = 0x1;
431 data->length = reclen;
432 data->operation.operation = 0x16;
434 case DASD_ECKD_CCW_READ_COUNT:
435 data->operation.operation = 0x06;
437 case DASD_ECKD_CCW_READ_TRACK:
438 data->operation.orientation = 0x1;
439 data->operation.operation = 0x0C;
440 data->extended_parameter_length = 0;
443 case DASD_ECKD_CCW_READ_TRACK_DATA:
444 data->auxiliary.length_valid = 0x1;
446 data->operation.operation = 0x0C;
448 case DASD_ECKD_CCW_ERASE:
449 data->length = reclen;
450 data->auxiliary.length_valid = 0x1;
451 data->operation.operation = 0x0b;
454 DBF_DEV_EVENT(DBF_ERR, device,
455 "fill LRE unknown opcode 0x%x", cmd);
458 set_ch_t(&data->seek_addr,
459 trk / private->rdc_data.trk_per_cyl,
460 trk % private->rdc_data.trk_per_cyl);
461 data->search_arg.cyl = data->seek_addr.cyl;
462 data->search_arg.head = data->seek_addr.head;
463 data->search_arg.record = rec_on_trk;
466 static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
467 unsigned int trk, unsigned int totrk, int cmd,
468 struct dasd_device *basedev, struct dasd_device *startdev,
469 unsigned char format, unsigned int rec_on_trk, int count,
470 unsigned int blksize, unsigned int tlf)
472 struct dasd_eckd_private *basepriv, *startpriv;
473 struct DE_eckd_data *dedata;
474 struct LRE_eckd_data *lredata;
476 u16 heads, beghead, endhead;
479 basepriv = (struct dasd_eckd_private *) basedev->private;
480 startpriv = (struct dasd_eckd_private *) startdev->private;
481 dedata = &pfxdata->define_extent;
482 lredata = &pfxdata->locate_record;
484 ccw->cmd_code = DASD_ECKD_CCW_PFX;
486 if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) {
487 ccw->count = sizeof(*pfxdata) + 2;
488 ccw->cda = (__u32) __pa(pfxdata);
489 memset(pfxdata, 0, sizeof(*pfxdata) + 2);
491 ccw->count = sizeof(*pfxdata);
492 ccw->cda = (__u32) __pa(pfxdata);
493 memset(pfxdata, 0, sizeof(*pfxdata));
498 DBF_DEV_EVENT(DBF_ERR, basedev,
499 "PFX LRE unknown format 0x%x", format);
503 pfxdata->format = format;
504 pfxdata->base_address = basepriv->ned->unit_addr;
505 pfxdata->base_lss = basepriv->ned->ID;
506 pfxdata->validity.define_extent = 1;
508 /* private uid is kept up to date, conf_data may be outdated */
509 if (startpriv->uid.type != UA_BASE_DEVICE) {
510 pfxdata->validity.verify_base = 1;
511 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS)
512 pfxdata->validity.hyper_pav = 1;
515 /* define extend data (mostly)*/
517 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
518 case DASD_ECKD_CCW_READ_RECORD_ZERO:
519 case DASD_ECKD_CCW_READ:
520 case DASD_ECKD_CCW_READ_MT:
521 case DASD_ECKD_CCW_READ_CKD:
522 case DASD_ECKD_CCW_READ_CKD_MT:
523 case DASD_ECKD_CCW_READ_KD:
524 case DASD_ECKD_CCW_READ_KD_MT:
525 case DASD_ECKD_CCW_READ_COUNT:
526 dedata->mask.perm = 0x1;
527 dedata->attributes.operation = basepriv->attrib.operation;
529 case DASD_ECKD_CCW_READ_TRACK:
530 case DASD_ECKD_CCW_READ_TRACK_DATA:
531 dedata->mask.perm = 0x1;
532 dedata->attributes.operation = basepriv->attrib.operation;
533 dedata->blk_size = 0;
535 case DASD_ECKD_CCW_WRITE:
536 case DASD_ECKD_CCW_WRITE_MT:
537 case DASD_ECKD_CCW_WRITE_KD:
538 case DASD_ECKD_CCW_WRITE_KD_MT:
539 dedata->mask.perm = 0x02;
540 dedata->attributes.operation = basepriv->attrib.operation;
541 rc = check_XRC_on_prefix(pfxdata, basedev);
543 case DASD_ECKD_CCW_WRITE_CKD:
544 case DASD_ECKD_CCW_WRITE_CKD_MT:
545 dedata->attributes.operation = DASD_BYPASS_CACHE;
546 rc = check_XRC_on_prefix(pfxdata, basedev);
548 case DASD_ECKD_CCW_ERASE:
549 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
550 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
551 dedata->mask.perm = 0x3;
552 dedata->mask.auth = 0x1;
553 dedata->attributes.operation = DASD_BYPASS_CACHE;
554 rc = check_XRC_on_prefix(pfxdata, basedev);
556 case DASD_ECKD_CCW_WRITE_FULL_TRACK:
557 dedata->mask.perm = 0x03;
558 dedata->attributes.operation = basepriv->attrib.operation;
559 dedata->blk_size = 0;
561 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
562 dedata->mask.perm = 0x02;
563 dedata->attributes.operation = basepriv->attrib.operation;
564 dedata->blk_size = blksize;
565 rc = check_XRC_on_prefix(pfxdata, basedev);
568 DBF_DEV_EVENT(DBF_ERR, basedev,
569 "PFX LRE unknown opcode 0x%x", cmd);
574 dedata->attributes.mode = 0x3; /* ECKD */
576 if ((basepriv->rdc_data.cu_type == 0x2105 ||
577 basepriv->rdc_data.cu_type == 0x2107 ||
578 basepriv->rdc_data.cu_type == 0x1750)
579 && !(basepriv->uses_cdl && trk < 2))
580 dedata->ga_extended |= 0x40; /* Regular Data Format Mode */
582 heads = basepriv->rdc_data.trk_per_cyl;
583 begcyl = trk / heads;
584 beghead = trk % heads;
585 endcyl = totrk / heads;
586 endhead = totrk % heads;
588 /* check for sequential prestage - enhance cylinder range */
589 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE ||
590 dedata->attributes.operation == DASD_SEQ_ACCESS) {
592 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl)
593 endcyl += basepriv->attrib.nr_cyl;
595 endcyl = (basepriv->real_cyl - 1);
598 set_ch_t(&dedata->beg_ext, begcyl, beghead);
599 set_ch_t(&dedata->end_ext, endcyl, endhead);
602 fill_LRE_data(lredata, trk, rec_on_trk, count, cmd,
603 basedev, blksize, tlf);
609 static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
610 unsigned int trk, unsigned int totrk, int cmd,
611 struct dasd_device *basedev, struct dasd_device *startdev)
613 return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev,
618 locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk,
619 unsigned int rec_on_trk, int no_rec, int cmd,
620 struct dasd_device * device, int reclen)
622 struct dasd_eckd_private *private;
626 private = (struct dasd_eckd_private *) device->private;
628 DBF_DEV_EVENT(DBF_INFO, device,
629 "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d",
630 trk, rec_on_trk, no_rec, cmd, reclen);
632 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD;
635 ccw->cda = (__u32) __pa(data);
637 memset(data, 0, sizeof(struct LO_eckd_data));
640 switch (private->rdc_data.dev_type) {
642 dn = ceil_quot(reclen + 6, 232);
643 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
644 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
647 d = 7 + ceil_quot(reclen + 12, 32);
648 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
652 data->sector = sector;
653 data->count = no_rec;
655 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
656 data->operation.orientation = 0x3;
657 data->operation.operation = 0x03;
659 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
660 data->operation.orientation = 0x3;
661 data->operation.operation = 0x16;
663 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
664 data->operation.orientation = 0x1;
665 data->operation.operation = 0x03;
668 case DASD_ECKD_CCW_READ_RECORD_ZERO:
669 data->operation.orientation = 0x3;
670 data->operation.operation = 0x16;
673 case DASD_ECKD_CCW_WRITE:
674 case DASD_ECKD_CCW_WRITE_MT:
675 case DASD_ECKD_CCW_WRITE_KD:
676 case DASD_ECKD_CCW_WRITE_KD_MT:
677 data->auxiliary.last_bytes_used = 0x1;
678 data->length = reclen;
679 data->operation.operation = 0x01;
681 case DASD_ECKD_CCW_WRITE_CKD:
682 case DASD_ECKD_CCW_WRITE_CKD_MT:
683 data->auxiliary.last_bytes_used = 0x1;
684 data->length = reclen;
685 data->operation.operation = 0x03;
687 case DASD_ECKD_CCW_READ:
688 case DASD_ECKD_CCW_READ_MT:
689 case DASD_ECKD_CCW_READ_KD:
690 case DASD_ECKD_CCW_READ_KD_MT:
691 data->auxiliary.last_bytes_used = 0x1;
692 data->length = reclen;
693 data->operation.operation = 0x06;
695 case DASD_ECKD_CCW_READ_CKD:
696 case DASD_ECKD_CCW_READ_CKD_MT:
697 data->auxiliary.last_bytes_used = 0x1;
698 data->length = reclen;
699 data->operation.operation = 0x16;
701 case DASD_ECKD_CCW_READ_COUNT:
702 data->operation.operation = 0x06;
704 case DASD_ECKD_CCW_ERASE:
705 data->length = reclen;
706 data->auxiliary.last_bytes_used = 0x1;
707 data->operation.operation = 0x0b;
710 DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record "
713 set_ch_t(&data->seek_addr,
714 trk / private->rdc_data.trk_per_cyl,
715 trk % private->rdc_data.trk_per_cyl);
716 data->search_arg.cyl = data->seek_addr.cyl;
717 data->search_arg.head = data->seek_addr.head;
718 data->search_arg.record = rec_on_trk;
722 * Returns 1 if the block is one of the special blocks that needs
723 * to get read/written with the KD variant of the command.
724 * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and
725 * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT.
726 * Luckily the KD variants differ only by one bit (0x08) from the
727 * normal variant. So don't wonder about code like:
728 * if (dasd_eckd_cdl_special(blk_per_trk, recid))
729 * ccw->cmd_code |= 0x8;
732 dasd_eckd_cdl_special(int blk_per_trk, int recid)
736 if (recid < blk_per_trk)
738 if (recid < 2 * blk_per_trk)
744 * Returns the record size for the special blocks of the cdl format.
745 * Only returns something useful if dasd_eckd_cdl_special is true
749 dasd_eckd_cdl_reclen(int recid)
752 return sizes_trk0[recid];
755 /* create unique id from private structure. */
756 static void create_uid(struct dasd_eckd_private *private)
759 struct dasd_uid *uid;
762 memset(uid, 0, sizeof(struct dasd_uid));
763 memcpy(uid->vendor, private->ned->HDA_manufacturer,
764 sizeof(uid->vendor) - 1);
765 EBCASC(uid->vendor, sizeof(uid->vendor) - 1);
766 memcpy(uid->serial, private->ned->HDA_location,
767 sizeof(uid->serial) - 1);
768 EBCASC(uid->serial, sizeof(uid->serial) - 1);
769 uid->ssid = private->gneq->subsystemID;
770 uid->real_unit_addr = private->ned->unit_addr;
772 uid->type = private->sneq->sua_flags;
773 if (uid->type == UA_BASE_PAV_ALIAS)
774 uid->base_unit_addr = private->sneq->base_unit_addr;
776 uid->type = UA_BASE_DEVICE;
778 if (private->vdsneq) {
779 for (count = 0; count < 16; count++) {
780 sprintf(uid->vduit+2*count, "%02x",
781 private->vdsneq->uit[count]);
787 * Generate device unique id that specifies the physical device.
789 static int dasd_eckd_generate_uid(struct dasd_device *device)
791 struct dasd_eckd_private *private;
794 private = (struct dasd_eckd_private *) device->private;
797 if (!private->ned || !private->gneq)
799 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
801 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
805 static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid)
807 struct dasd_eckd_private *private;
810 if (device->private) {
811 private = (struct dasd_eckd_private *)device->private;
812 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
814 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
821 * compare device UID with data of a given dasd_eckd_private structure
824 static int dasd_eckd_compare_path_uid(struct dasd_device *device,
825 struct dasd_eckd_private *private)
827 struct dasd_uid device_uid;
830 dasd_eckd_get_uid(device, &device_uid);
832 return memcmp(&device_uid, &private->uid, sizeof(struct dasd_uid));
835 static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device,
836 struct dasd_ccw_req *cqr,
842 * buffer has to start with EBCDIC "V1.0" to show
843 * support for virtual device SNEQ
845 rcd_buffer[0] = 0xE5;
846 rcd_buffer[1] = 0xF1;
847 rcd_buffer[2] = 0x4B;
848 rcd_buffer[3] = 0xF0;
851 ccw->cmd_code = DASD_ECKD_CCW_RCD;
853 ccw->cda = (__u32)(addr_t)rcd_buffer;
854 ccw->count = DASD_ECKD_RCD_DATA_SIZE;
855 cqr->magic = DASD_ECKD_MAGIC;
857 cqr->startdev = device;
858 cqr->memdev = device;
860 cqr->expires = 10*HZ;
863 cqr->buildclk = get_clock();
864 cqr->status = DASD_CQR_FILLED;
865 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags);
869 * Wakeup helper for read_conf
870 * if the cqr is not done and needs some error recovery
871 * the buffer has to be re-initialized with the EBCDIC "V1.0"
872 * to show support for virtual device SNEQ
874 static void read_conf_cb(struct dasd_ccw_req *cqr, void *data)
879 if (cqr->status != DASD_CQR_DONE) {
881 rcd_buffer = (__u8 *)((addr_t) ccw->cda);
882 memset(rcd_buffer, 0, sizeof(*rcd_buffer));
884 rcd_buffer[0] = 0xE5;
885 rcd_buffer[1] = 0xF1;
886 rcd_buffer[2] = 0x4B;
887 rcd_buffer[3] = 0xF0;
889 dasd_wakeup_cb(cqr, data);
892 static int dasd_eckd_read_conf_immediately(struct dasd_device *device,
893 struct dasd_ccw_req *cqr,
900 * sanity check: scan for RCD command in extended SenseID data
901 * some devices do not support RCD
903 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD);
904 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD)
907 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm);
908 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
909 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags);
911 cqr->callback = read_conf_cb;
912 rc = dasd_sleep_on_immediatly(cqr);
916 static int dasd_eckd_read_conf_lpm(struct dasd_device *device,
918 int *rcd_buffer_size, __u8 lpm)
921 char *rcd_buf = NULL;
923 struct dasd_ccw_req *cqr;
926 * sanity check: scan for RCD command in extended SenseID data
927 * some devices do not support RCD
929 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD);
930 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) {
934 rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA);
939 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */,
940 0, /* use rcd_buf as data ara */
943 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
944 "Could not allocate RCD request");
948 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm);
949 cqr->callback = read_conf_cb;
950 ret = dasd_sleep_on(cqr);
952 * on success we update the user input parms
954 dasd_sfree_request(cqr, cqr->memdev);
958 *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE;
959 *rcd_buffer = rcd_buf;
964 *rcd_buffer_size = 0;
968 static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private)
971 struct dasd_sneq *sneq;
975 private->sneq = NULL;
976 private->vdsneq = NULL;
977 private->gneq = NULL;
978 count = private->conf_len / sizeof(struct dasd_sneq);
979 sneq = (struct dasd_sneq *)private->conf_data;
980 for (i = 0; i < count; ++i) {
981 if (sneq->flags.identifier == 1 && sneq->format == 1)
982 private->sneq = sneq;
983 else if (sneq->flags.identifier == 1 && sneq->format == 4)
984 private->vdsneq = (struct vd_sneq *)sneq;
985 else if (sneq->flags.identifier == 2)
986 private->gneq = (struct dasd_gneq *)sneq;
987 else if (sneq->flags.identifier == 3 && sneq->res1 == 1)
988 private->ned = (struct dasd_ned *)sneq;
991 if (!private->ned || !private->gneq) {
993 private->sneq = NULL;
994 private->vdsneq = NULL;
995 private->gneq = NULL;
1002 static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len)
1004 struct dasd_gneq *gneq;
1005 int i, count, found;
1007 count = conf_len / sizeof(*gneq);
1008 gneq = (struct dasd_gneq *)conf_data;
1010 for (i = 0; i < count; ++i) {
1011 if (gneq->flags.identifier == 2) {
1018 return ((char *)gneq)[18] & 0x07;
1023 static int dasd_eckd_read_conf(struct dasd_device *device)
1026 int conf_len, conf_data_saved;
1029 struct dasd_eckd_private *private, path_private;
1030 struct dasd_path *path_data;
1031 struct dasd_uid *uid;
1032 char print_path_uid[60], print_device_uid[60];
1034 private = (struct dasd_eckd_private *) device->private;
1035 path_data = &device->path_data;
1036 opm = ccw_device_get_path_mask(device->cdev);
1037 conf_data_saved = 0;
1038 /* get configuration data per operational path */
1039 for (lpm = 0x80; lpm; lpm>>= 1) {
1042 rc = dasd_eckd_read_conf_lpm(device, &conf_data,
1044 if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */
1045 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1046 "Read configuration data returned "
1050 if (conf_data == NULL) {
1051 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1052 "No configuration data "
1054 /* no further analysis possible */
1055 path_data->opm |= lpm;
1056 continue; /* no error */
1058 /* save first valid configuration data */
1059 if (!conf_data_saved) {
1060 kfree(private->conf_data);
1061 private->conf_data = conf_data;
1062 private->conf_len = conf_len;
1063 if (dasd_eckd_identify_conf_parts(private)) {
1064 private->conf_data = NULL;
1065 private->conf_len = 0;
1070 * build device UID that other path data
1071 * can be compared to it
1073 dasd_eckd_generate_uid(device);
1076 path_private.conf_data = conf_data;
1077 path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE;
1078 if (dasd_eckd_identify_conf_parts(
1080 path_private.conf_data = NULL;
1081 path_private.conf_len = 0;
1086 if (dasd_eckd_compare_path_uid(
1087 device, &path_private)) {
1088 uid = &path_private.uid;
1089 if (strlen(uid->vduit) > 0)
1090 snprintf(print_path_uid,
1091 sizeof(print_path_uid),
1092 "%s.%s.%04x.%02x.%s",
1093 uid->vendor, uid->serial,
1094 uid->ssid, uid->real_unit_addr,
1097 snprintf(print_path_uid,
1098 sizeof(print_path_uid),
1100 uid->vendor, uid->serial,
1102 uid->real_unit_addr);
1103 uid = &private->uid;
1104 if (strlen(uid->vduit) > 0)
1105 snprintf(print_device_uid,
1106 sizeof(print_device_uid),
1107 "%s.%s.%04x.%02x.%s",
1108 uid->vendor, uid->serial,
1109 uid->ssid, uid->real_unit_addr,
1112 snprintf(print_device_uid,
1113 sizeof(print_device_uid),
1115 uid->vendor, uid->serial,
1117 uid->real_unit_addr);
1118 dev_err(&device->cdev->dev,
1119 "Not all channel paths lead to "
1120 "the same device, path %02X leads to "
1121 "device %s instead of %s\n", lpm,
1122 print_path_uid, print_device_uid);
1126 path_private.conf_data = NULL;
1127 path_private.conf_len = 0;
1129 switch (dasd_eckd_path_access(conf_data, conf_len)) {
1131 path_data->npm |= lpm;
1134 path_data->ppm |= lpm;
1137 path_data->opm |= lpm;
1139 if (conf_data != private->conf_data)
1146 static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm)
1148 struct dasd_eckd_private *private;
1152 private = (struct dasd_eckd_private *) device->private;
1153 if (private->fcx_max_data) {
1154 mdc = ccw_device_get_mdc(device->cdev, lpm);
1156 dev_warn(&device->cdev->dev,
1157 "Detecting the maximum data size for zHPF "
1158 "requests failed (rc=%d) for a new path %x\n",
1162 fcx_max_data = mdc * FCX_MAX_DATA_FACTOR;
1163 if (fcx_max_data < private->fcx_max_data) {
1164 dev_warn(&device->cdev->dev,
1165 "The maximum data size for zHPF requests %u "
1166 "on a new path %x is below the active maximum "
1167 "%u\n", fcx_max_data, lpm,
1168 private->fcx_max_data);
1175 static int rebuild_device_uid(struct dasd_device *device,
1176 struct path_verification_work_data *data)
1178 struct dasd_eckd_private *private;
1179 struct dasd_path *path_data;
1184 private = (struct dasd_eckd_private *) device->private;
1185 path_data = &device->path_data;
1186 opm = device->path_data.opm;
1188 for (lpm = 0x80; lpm; lpm >>= 1) {
1191 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer));
1192 memset(&data->cqr, 0, sizeof(data->cqr));
1193 data->cqr.cpaddr = &data->ccw;
1194 rc = dasd_eckd_read_conf_immediately(device, &data->cqr,
1199 if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */
1201 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1202 "Read configuration data "
1203 "returned error %d", rc);
1206 memcpy(private->conf_data, data->rcd_buffer,
1207 DASD_ECKD_RCD_DATA_SIZE);
1208 if (dasd_eckd_identify_conf_parts(private)) {
1210 } else /* first valid path is enough */
1215 rc = dasd_eckd_generate_uid(device);
1220 static void do_path_verification_work(struct work_struct *work)
1222 struct path_verification_work_data *data;
1223 struct dasd_device *device;
1224 struct dasd_eckd_private path_private;
1225 struct dasd_uid *uid;
1226 __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE];
1227 __u8 lpm, opm, npm, ppm, epm;
1228 unsigned long flags;
1232 data = container_of(work, struct path_verification_work_data, worker);
1233 device = data->device;
1235 /* delay path verification until device was resumed */
1236 if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) {
1237 schedule_work(work);
1245 for (lpm = 0x80; lpm; lpm >>= 1) {
1246 if (!(lpm & data->tbvpm))
1248 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer));
1249 memset(&data->cqr, 0, sizeof(data->cqr));
1250 data->cqr.cpaddr = &data->ccw;
1251 rc = dasd_eckd_read_conf_immediately(device, &data->cqr,
1255 switch (dasd_eckd_path_access(data->rcd_buffer,
1256 DASD_ECKD_RCD_DATA_SIZE)
1266 } else if (rc == -EOPNOTSUPP) {
1267 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1268 "path verification: No configuration "
1271 } else if (rc == -EAGAIN) {
1272 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1273 "path verification: device is stopped,"
1274 " try again later");
1277 dev_warn(&device->cdev->dev,
1278 "Reading device feature codes failed "
1279 "(rc=%d) for new path %x\n", rc, lpm);
1282 if (verify_fcx_max_data(device, lpm)) {
1290 * save conf_data for comparison after
1291 * rebuild_device_uid may have changed
1294 memcpy(&path_rcd_buf, data->rcd_buffer,
1295 DASD_ECKD_RCD_DATA_SIZE);
1296 path_private.conf_data = (void *) &path_rcd_buf;
1297 path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE;
1298 if (dasd_eckd_identify_conf_parts(&path_private)) {
1299 path_private.conf_data = NULL;
1300 path_private.conf_len = 0;
1305 * compare path UID with device UID only if at least
1306 * one valid path is left
1307 * in other case the device UID may have changed and
1308 * the first working path UID will be used as device UID
1310 if (device->path_data.opm &&
1311 dasd_eckd_compare_path_uid(device, &path_private)) {
1313 * the comparison was not successful
1314 * rebuild the device UID with at least one
1315 * known path in case a z/VM hyperswap command
1316 * has changed the device
1318 * after this compare again
1320 * if either the rebuild or the recompare fails
1321 * the path can not be used
1323 if (rebuild_device_uid(device, data) ||
1324 dasd_eckd_compare_path_uid(
1325 device, &path_private)) {
1326 uid = &path_private.uid;
1327 if (strlen(uid->vduit) > 0)
1328 snprintf(print_uid, sizeof(print_uid),
1329 "%s.%s.%04x.%02x.%s",
1330 uid->vendor, uid->serial,
1331 uid->ssid, uid->real_unit_addr,
1334 snprintf(print_uid, sizeof(print_uid),
1336 uid->vendor, uid->serial,
1338 uid->real_unit_addr);
1339 dev_err(&device->cdev->dev,
1340 "The newly added channel path %02X "
1341 "will not be used because it leads "
1342 "to a different device %s\n",
1352 * There is a small chance that a path is lost again between
1353 * above path verification and the following modification of
1354 * the device opm mask. We could avoid that race here by using
1355 * yet another path mask, but we rather deal with this unlikely
1356 * situation in dasd_start_IO.
1358 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
1359 if (!device->path_data.opm && opm) {
1360 device->path_data.opm = opm;
1361 dasd_generic_path_operational(device);
1363 device->path_data.opm |= opm;
1364 device->path_data.npm |= npm;
1365 device->path_data.ppm |= ppm;
1366 device->path_data.tbvpm |= epm;
1367 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
1370 dasd_put_device(device);
1372 mutex_unlock(&dasd_path_verification_mutex);
1377 static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm)
1379 struct path_verification_work_data *data;
1381 data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA);
1383 if (mutex_trylock(&dasd_path_verification_mutex)) {
1384 data = path_verification_worker;
1389 memset(data, 0, sizeof(*data));
1392 INIT_WORK(&data->worker, do_path_verification_work);
1393 dasd_get_device(device);
1394 data->device = device;
1396 schedule_work(&data->worker);
1400 static int dasd_eckd_read_features(struct dasd_device *device)
1402 struct dasd_psf_prssd_data *prssdp;
1403 struct dasd_rssd_features *features;
1404 struct dasd_ccw_req *cqr;
1407 struct dasd_eckd_private *private;
1409 private = (struct dasd_eckd_private *) device->private;
1410 memset(&private->features, 0, sizeof(struct dasd_rssd_features));
1411 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
1412 (sizeof(struct dasd_psf_prssd_data) +
1413 sizeof(struct dasd_rssd_features)),
1416 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not "
1417 "allocate initialization request");
1418 return PTR_ERR(cqr);
1420 cqr->startdev = device;
1421 cqr->memdev = device;
1424 cqr->expires = 10 * HZ;
1426 /* Prepare for Read Subsystem Data */
1427 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
1428 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
1429 prssdp->order = PSF_ORDER_PRSSD;
1430 prssdp->suborder = 0x41; /* Read Feature Codes */
1431 /* all other bytes of prssdp must be zero */
1434 ccw->cmd_code = DASD_ECKD_CCW_PSF;
1435 ccw->count = sizeof(struct dasd_psf_prssd_data);
1436 ccw->flags |= CCW_FLAG_CC;
1437 ccw->cda = (__u32)(addr_t) prssdp;
1439 /* Read Subsystem Data - feature codes */
1440 features = (struct dasd_rssd_features *) (prssdp + 1);
1441 memset(features, 0, sizeof(struct dasd_rssd_features));
1444 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
1445 ccw->count = sizeof(struct dasd_rssd_features);
1446 ccw->cda = (__u32)(addr_t) features;
1448 cqr->buildclk = get_clock();
1449 cqr->status = DASD_CQR_FILLED;
1450 rc = dasd_sleep_on(cqr);
1452 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
1453 features = (struct dasd_rssd_features *) (prssdp + 1);
1454 memcpy(&private->features, features,
1455 sizeof(struct dasd_rssd_features));
1457 dev_warn(&device->cdev->dev, "Reading device feature codes"
1458 " failed with rc=%d\n", rc);
1459 dasd_sfree_request(cqr, cqr->memdev);
1465 * Build CP for Perform Subsystem Function - SSC.
1467 static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device,
1470 struct dasd_ccw_req *cqr;
1471 struct dasd_psf_ssc_data *psf_ssc_data;
1474 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ ,
1475 sizeof(struct dasd_psf_ssc_data),
1479 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1480 "Could not allocate PSF-SSC request");
1483 psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data;
1484 psf_ssc_data->order = PSF_ORDER_SSC;
1485 psf_ssc_data->suborder = 0xc0;
1487 psf_ssc_data->suborder |= 0x08;
1488 psf_ssc_data->reserved[0] = 0x88;
1491 ccw->cmd_code = DASD_ECKD_CCW_PSF;
1492 ccw->cda = (__u32)(addr_t)psf_ssc_data;
1495 cqr->startdev = device;
1496 cqr->memdev = device;
1499 cqr->expires = 10*HZ;
1500 cqr->buildclk = get_clock();
1501 cqr->status = DASD_CQR_FILLED;
1506 * Perform Subsystem Function.
1507 * It is necessary to trigger CIO for channel revalidation since this
1508 * call might change behaviour of DASD devices.
1511 dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav)
1513 struct dasd_ccw_req *cqr;
1516 cqr = dasd_eckd_build_psf_ssc(device, enable_pav);
1518 return PTR_ERR(cqr);
1520 rc = dasd_sleep_on(cqr);
1522 /* trigger CIO to reprobe devices */
1523 css_schedule_reprobe();
1524 dasd_sfree_request(cqr, cqr->memdev);
1529 * Valide storage server of current device.
1531 static void dasd_eckd_validate_server(struct dasd_device *device)
1534 struct dasd_eckd_private *private;
1537 if (dasd_nopav || MACHINE_IS_VM)
1541 rc = dasd_eckd_psf_ssc(device, enable_pav);
1543 /* may be requested feature is not available on server,
1544 * therefore just report error and go ahead */
1545 private = (struct dasd_eckd_private *) device->private;
1546 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x "
1547 "returned rc=%d", private->uid.ssid, rc);
1550 static u32 get_fcx_max_data(struct dasd_device *device)
1552 #if defined(CONFIG_64BIT)
1554 int fcx_in_css, fcx_in_gneq, fcx_in_features;
1555 struct dasd_eckd_private *private;
1559 /* is transport mode supported? */
1560 private = (struct dasd_eckd_private *) device->private;
1561 fcx_in_css = css_general_characteristics.fcx;
1562 fcx_in_gneq = private->gneq->reserved2[7] & 0x04;
1563 fcx_in_features = private->features.feature[40] & 0x80;
1564 tpm = fcx_in_css && fcx_in_gneq && fcx_in_features;
1569 mdc = ccw_device_get_mdc(device->cdev, 0);
1571 dev_warn(&device->cdev->dev, "Detecting the maximum supported"
1572 " data size for zHPF requests failed\n");
1575 return mdc * FCX_MAX_DATA_FACTOR;
1582 * Check device characteristics.
1583 * If the device is accessible using ECKD discipline, the device is enabled.
1586 dasd_eckd_check_characteristics(struct dasd_device *device)
1588 struct dasd_eckd_private *private;
1589 struct dasd_block *block;
1590 struct dasd_uid temp_uid;
1591 int is_known, rc, i;
1593 unsigned long value;
1595 if (!ccw_device_is_pathgroup(device->cdev)) {
1596 dev_warn(&device->cdev->dev,
1597 "A channel path group could not be established\n");
1600 if (!ccw_device_is_multipath(device->cdev)) {
1601 dev_info(&device->cdev->dev,
1602 "The DASD is not operating in multipath mode\n");
1604 private = (struct dasd_eckd_private *) device->private;
1606 private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA);
1608 dev_warn(&device->cdev->dev,
1609 "Allocating memory for private DASD data "
1613 device->private = (void *) private;
1615 memset(private, 0, sizeof(*private));
1617 /* Invalidate status of initial analysis. */
1618 private->init_cqr_status = -1;
1619 /* Set default cache operations. */
1620 private->attrib.operation = DASD_NORMAL_CACHE;
1621 private->attrib.nr_cyl = 0;
1623 /* Read Configuration Data */
1624 rc = dasd_eckd_read_conf(device);
1628 /* set default timeout */
1629 device->default_expires = DASD_EXPIRES;
1630 if (private->gneq) {
1632 for (i = 0; i < private->gneq->timeout.value; i++)
1634 value = value * private->gneq->timeout.number;
1635 /* do not accept useless values */
1636 if (value != 0 && value <= DASD_EXPIRES_MAX)
1637 device->default_expires = value;
1640 dasd_eckd_get_uid(device, &temp_uid);
1641 if (temp_uid.type == UA_BASE_DEVICE) {
1642 block = dasd_alloc_block();
1643 if (IS_ERR(block)) {
1644 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1645 "could not allocate dasd "
1647 rc = PTR_ERR(block);
1650 device->block = block;
1651 block->base = device;
1654 /* register lcu with alias handling, enable PAV if this is a new lcu */
1655 is_known = dasd_alias_make_device_known_to_lcu(device);
1661 * dasd_eckd_validate_server is done on the first device that
1662 * is found for an LCU. All later other devices have to wait
1663 * for it, so they will read the correct feature codes.
1666 dasd_eckd_validate_server(device);
1667 dasd_alias_lcu_setup_complete(device);
1669 dasd_alias_wait_for_lcu_setup(device);
1671 /* device may report different configuration data after LCU setup */
1672 rc = dasd_eckd_read_conf(device);
1676 /* Read Feature Codes */
1677 dasd_eckd_read_features(device);
1679 /* Read Device Characteristics */
1680 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
1681 &private->rdc_data, 64);
1683 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1684 "Read device characteristic failed, rc=%d", rc);
1688 if ((device->features & DASD_FEATURE_USERAW) &&
1689 !(private->rdc_data.facilities.RT_in_LR)) {
1690 dev_err(&device->cdev->dev, "The storage server does not "
1691 "support raw-track access\n");
1696 /* find the valid cylinder size */
1697 if (private->rdc_data.no_cyl == LV_COMPAT_CYL &&
1698 private->rdc_data.long_no_cyl)
1699 private->real_cyl = private->rdc_data.long_no_cyl;
1701 private->real_cyl = private->rdc_data.no_cyl;
1703 private->fcx_max_data = get_fcx_max_data(device);
1705 readonly = dasd_device_is_ro(device);
1707 set_bit(DASD_FLAG_DEVICE_RO, &device->flags);
1709 dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) "
1710 "with %d cylinders, %d heads, %d sectors%s\n",
1711 private->rdc_data.dev_type,
1712 private->rdc_data.dev_model,
1713 private->rdc_data.cu_type,
1714 private->rdc_data.cu_model.model,
1716 private->rdc_data.trk_per_cyl,
1717 private->rdc_data.sec_per_trk,
1718 readonly ? ", read-only device" : "");
1722 dasd_alias_disconnect_device_from_lcu(device);
1724 dasd_free_block(device->block);
1725 device->block = NULL;
1727 kfree(private->conf_data);
1728 kfree(device->private);
1729 device->private = NULL;
1733 static void dasd_eckd_uncheck_device(struct dasd_device *device)
1735 struct dasd_eckd_private *private;
1737 private = (struct dasd_eckd_private *) device->private;
1738 dasd_alias_disconnect_device_from_lcu(device);
1739 private->ned = NULL;
1740 private->sneq = NULL;
1741 private->vdsneq = NULL;
1742 private->gneq = NULL;
1743 private->conf_len = 0;
1744 kfree(private->conf_data);
1745 private->conf_data = NULL;
1748 static struct dasd_ccw_req *
1749 dasd_eckd_analysis_ccw(struct dasd_device *device)
1751 struct dasd_eckd_private *private;
1752 struct eckd_count *count_data;
1753 struct LO_eckd_data *LO_data;
1754 struct dasd_ccw_req *cqr;
1756 int cplength, datasize;
1759 private = (struct dasd_eckd_private *) device->private;
1762 datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data);
1763 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device);
1767 /* Define extent for the first 3 tracks. */
1768 define_extent(ccw++, cqr->data, 0, 2,
1769 DASD_ECKD_CCW_READ_COUNT, device);
1770 LO_data = cqr->data + sizeof(struct DE_eckd_data);
1771 /* Locate record for the first 4 records on track 0. */
1772 ccw[-1].flags |= CCW_FLAG_CC;
1773 locate_record(ccw++, LO_data++, 0, 0, 4,
1774 DASD_ECKD_CCW_READ_COUNT, device, 0);
1776 count_data = private->count_area;
1777 for (i = 0; i < 4; i++) {
1778 ccw[-1].flags |= CCW_FLAG_CC;
1779 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
1782 ccw->cda = (__u32)(addr_t) count_data;
1787 /* Locate record for the first record on track 2. */
1788 ccw[-1].flags |= CCW_FLAG_CC;
1789 locate_record(ccw++, LO_data++, 2, 0, 1,
1790 DASD_ECKD_CCW_READ_COUNT, device, 0);
1791 /* Read count ccw. */
1792 ccw[-1].flags |= CCW_FLAG_CC;
1793 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
1796 ccw->cda = (__u32)(addr_t) count_data;
1799 cqr->startdev = device;
1800 cqr->memdev = device;
1802 cqr->buildclk = get_clock();
1803 cqr->status = DASD_CQR_FILLED;
1807 /* differentiate between 'no record found' and any other error */
1808 static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr)
1811 if (init_cqr->status == DASD_CQR_DONE)
1813 else if (init_cqr->status == DASD_CQR_NEED_ERP ||
1814 init_cqr->status == DASD_CQR_FAILED) {
1815 sense = dasd_get_sense(&init_cqr->irb);
1816 if (sense && (sense[1] & SNS1_NO_REC_FOUND))
1817 return INIT_CQR_UNFORMATTED;
1819 return INIT_CQR_ERROR;
1821 return INIT_CQR_ERROR;
1825 * This is the callback function for the init_analysis cqr. It saves
1826 * the status of the initial analysis ccw before it frees it and kicks
1827 * the device to continue the startup sequence. This will call
1828 * dasd_eckd_do_analysis again (if the devices has not been marked
1829 * for deletion in the meantime).
1831 static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr,
1834 struct dasd_eckd_private *private;
1835 struct dasd_device *device;
1837 device = init_cqr->startdev;
1838 private = (struct dasd_eckd_private *) device->private;
1839 private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr);
1840 dasd_sfree_request(init_cqr, device);
1841 dasd_kick_device(device);
1844 static int dasd_eckd_start_analysis(struct dasd_block *block)
1846 struct dasd_ccw_req *init_cqr;
1848 init_cqr = dasd_eckd_analysis_ccw(block->base);
1849 if (IS_ERR(init_cqr))
1850 return PTR_ERR(init_cqr);
1851 init_cqr->callback = dasd_eckd_analysis_callback;
1852 init_cqr->callback_data = NULL;
1853 init_cqr->expires = 5*HZ;
1854 /* first try without ERP, so we can later handle unformatted
1855 * devices as special case
1857 clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags);
1858 init_cqr->retries = 0;
1859 dasd_add_request_head(init_cqr);
1863 static int dasd_eckd_end_analysis(struct dasd_block *block)
1865 struct dasd_device *device;
1866 struct dasd_eckd_private *private;
1867 struct eckd_count *count_area;
1868 unsigned int sb, blk_per_trk;
1870 struct dasd_ccw_req *init_cqr;
1872 device = block->base;
1873 private = (struct dasd_eckd_private *) device->private;
1874 status = private->init_cqr_status;
1875 private->init_cqr_status = -1;
1876 if (status == INIT_CQR_ERROR) {
1877 /* try again, this time with full ERP */
1878 init_cqr = dasd_eckd_analysis_ccw(device);
1879 dasd_sleep_on(init_cqr);
1880 status = dasd_eckd_analysis_evaluation(init_cqr);
1881 dasd_sfree_request(init_cqr, device);
1884 if (device->features & DASD_FEATURE_USERAW) {
1885 block->bp_block = DASD_RAW_BLOCKSIZE;
1886 blk_per_trk = DASD_RAW_BLOCK_PER_TRACK;
1887 block->s2b_shift = 3;
1891 if (status == INIT_CQR_UNFORMATTED) {
1892 dev_warn(&device->cdev->dev, "The DASD is not formatted\n");
1893 return -EMEDIUMTYPE;
1894 } else if (status == INIT_CQR_ERROR) {
1895 dev_err(&device->cdev->dev,
1896 "Detecting the DASD disk layout failed because "
1897 "of an I/O error\n");
1901 private->uses_cdl = 1;
1902 /* Check Track 0 for Compatible Disk Layout */
1904 for (i = 0; i < 3; i++) {
1905 if (private->count_area[i].kl != 4 ||
1906 private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4) {
1907 private->uses_cdl = 0;
1912 count_area = &private->count_area[4];
1914 if (private->uses_cdl == 0) {
1915 for (i = 0; i < 5; i++) {
1916 if ((private->count_area[i].kl != 0) ||
1917 (private->count_area[i].dl !=
1918 private->count_area[0].dl))
1922 count_area = &private->count_area[0];
1924 if (private->count_area[3].record == 1)
1925 dev_warn(&device->cdev->dev,
1926 "Track 0 has no records following the VTOC\n");
1929 if (count_area != NULL && count_area->kl == 0) {
1930 /* we found notthing violating our disk layout */
1931 if (dasd_check_blocksize(count_area->dl) == 0)
1932 block->bp_block = count_area->dl;
1934 if (block->bp_block == 0) {
1935 dev_warn(&device->cdev->dev,
1936 "The disk layout of the DASD is not supported\n");
1937 return -EMEDIUMTYPE;
1939 block->s2b_shift = 0; /* bits to shift 512 to get a block */
1940 for (sb = 512; sb < block->bp_block; sb = sb << 1)
1943 blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block);
1946 block->blocks = (private->real_cyl *
1947 private->rdc_data.trk_per_cyl *
1950 dev_info(&device->cdev->dev,
1951 "DASD with %d KB/block, %d KB total size, %d KB/track, "
1952 "%s\n", (block->bp_block >> 10),
1953 ((private->real_cyl *
1954 private->rdc_data.trk_per_cyl *
1955 blk_per_trk * (block->bp_block >> 9)) >> 1),
1956 ((blk_per_trk * block->bp_block) >> 10),
1958 "compatible disk layout" : "linux disk layout");
1963 static int dasd_eckd_do_analysis(struct dasd_block *block)
1965 struct dasd_eckd_private *private;
1967 private = (struct dasd_eckd_private *) block->base->private;
1968 if (private->init_cqr_status < 0)
1969 return dasd_eckd_start_analysis(block);
1971 return dasd_eckd_end_analysis(block);
1974 static int dasd_eckd_ready_to_online(struct dasd_device *device)
1976 return dasd_alias_add_device(device);
1979 static int dasd_eckd_online_to_ready(struct dasd_device *device)
1981 cancel_work_sync(&device->reload_device);
1982 return dasd_alias_remove_device(device);
1986 dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo)
1988 struct dasd_eckd_private *private;
1990 private = (struct dasd_eckd_private *) block->base->private;
1991 if (dasd_check_blocksize(block->bp_block) == 0) {
1992 geo->sectors = recs_per_track(&private->rdc_data,
1993 0, block->bp_block);
1995 geo->cylinders = private->rdc_data.no_cyl;
1996 geo->heads = private->rdc_data.trk_per_cyl;
2000 static struct dasd_ccw_req *
2001 dasd_eckd_format_device(struct dasd_device * device,
2002 struct format_data_t * fdata)
2004 struct dasd_eckd_private *private;
2005 struct dasd_ccw_req *fcp;
2006 struct eckd_count *ect;
2010 struct ch_t address;
2011 int cplength, datasize;
2016 private = (struct dasd_eckd_private *) device->private;
2017 rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize);
2019 fdata->start_unit / private->rdc_data.trk_per_cyl,
2020 fdata->start_unit % private->rdc_data.trk_per_cyl);
2022 /* Sanity checks. */
2023 if (fdata->start_unit >=
2024 (private->real_cyl * private->rdc_data.trk_per_cyl)) {
2025 dev_warn(&device->cdev->dev, "Start track number %d used in "
2026 "formatting is too big\n", fdata->start_unit);
2027 return ERR_PTR(-EINVAL);
2029 if (fdata->start_unit > fdata->stop_unit) {
2030 dev_warn(&device->cdev->dev, "Start track %d used in "
2031 "formatting exceeds end track\n", fdata->start_unit);
2032 return ERR_PTR(-EINVAL);
2034 if (dasd_check_blocksize(fdata->blksize) != 0) {
2035 dev_warn(&device->cdev->dev,
2036 "The DASD cannot be formatted with block size %d\n",
2038 return ERR_PTR(-EINVAL);
2042 * fdata->intensity is a bit string that tells us what to do:
2043 * Bit 0: write record zero
2044 * Bit 1: write home address, currently not supported
2045 * Bit 2: invalidate tracks
2046 * Bit 3: use OS/390 compatible disk layout (cdl)
2047 * Bit 4: do not allow storage subsystem to modify record zero
2048 * Only some bit combinations do make sense.
2050 if (fdata->intensity & 0x10) {
2052 intensity = fdata->intensity & ~0x10;
2055 intensity = fdata->intensity;
2057 switch (intensity) {
2058 case 0x00: /* Normal format */
2059 case 0x08: /* Normal format, use cdl. */
2061 datasize = sizeof(struct DE_eckd_data) +
2062 sizeof(struct LO_eckd_data) +
2063 rpt * sizeof(struct eckd_count);
2065 case 0x01: /* Write record zero and format track. */
2066 case 0x09: /* Write record zero and format track, use cdl. */
2068 datasize = sizeof(struct DE_eckd_data) +
2069 sizeof(struct LO_eckd_data) +
2070 sizeof(struct eckd_count) +
2071 rpt * sizeof(struct eckd_count);
2073 case 0x04: /* Invalidate track. */
2074 case 0x0c: /* Invalidate track, use cdl. */
2076 datasize = sizeof(struct DE_eckd_data) +
2077 sizeof(struct LO_eckd_data) +
2078 sizeof(struct eckd_count);
2081 dev_warn(&device->cdev->dev, "An I/O control call used "
2082 "incorrect flags 0x%x\n", fdata->intensity);
2083 return ERR_PTR(-EINVAL);
2085 /* Allocate the format ccw request. */
2086 fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device);
2093 switch (intensity & ~0x08) {
2094 case 0x00: /* Normal format. */
2095 define_extent(ccw++, (struct DE_eckd_data *) data,
2096 fdata->start_unit, fdata->start_unit,
2097 DASD_ECKD_CCW_WRITE_CKD, device);
2098 /* grant subsystem permission to format R0 */
2100 ((struct DE_eckd_data *)data)->ga_extended |= 0x04;
2101 data += sizeof(struct DE_eckd_data);
2102 ccw[-1].flags |= CCW_FLAG_CC;
2103 locate_record(ccw++, (struct LO_eckd_data *) data,
2104 fdata->start_unit, 0, rpt,
2105 DASD_ECKD_CCW_WRITE_CKD, device,
2107 data += sizeof(struct LO_eckd_data);
2109 case 0x01: /* Write record zero + format track. */
2110 define_extent(ccw++, (struct DE_eckd_data *) data,
2111 fdata->start_unit, fdata->start_unit,
2112 DASD_ECKD_CCW_WRITE_RECORD_ZERO,
2114 data += sizeof(struct DE_eckd_data);
2115 ccw[-1].flags |= CCW_FLAG_CC;
2116 locate_record(ccw++, (struct LO_eckd_data *) data,
2117 fdata->start_unit, 0, rpt + 1,
2118 DASD_ECKD_CCW_WRITE_RECORD_ZERO, device,
2119 device->block->bp_block);
2120 data += sizeof(struct LO_eckd_data);
2122 case 0x04: /* Invalidate track. */
2123 define_extent(ccw++, (struct DE_eckd_data *) data,
2124 fdata->start_unit, fdata->start_unit,
2125 DASD_ECKD_CCW_WRITE_CKD, device);
2126 data += sizeof(struct DE_eckd_data);
2127 ccw[-1].flags |= CCW_FLAG_CC;
2128 locate_record(ccw++, (struct LO_eckd_data *) data,
2129 fdata->start_unit, 0, 1,
2130 DASD_ECKD_CCW_WRITE_CKD, device, 8);
2131 data += sizeof(struct LO_eckd_data);
2134 if (intensity & 0x01) { /* write record zero */
2135 ect = (struct eckd_count *) data;
2136 data += sizeof(struct eckd_count);
2137 ect->cyl = address.cyl;
2138 ect->head = address.head;
2142 ccw[-1].flags |= CCW_FLAG_CC;
2143 ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO;
2144 ccw->flags = CCW_FLAG_SLI;
2146 ccw->cda = (__u32)(addr_t) ect;
2149 if ((intensity & ~0x08) & 0x04) { /* erase track */
2150 ect = (struct eckd_count *) data;
2151 data += sizeof(struct eckd_count);
2152 ect->cyl = address.cyl;
2153 ect->head = address.head;
2157 ccw[-1].flags |= CCW_FLAG_CC;
2158 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD;
2159 ccw->flags = CCW_FLAG_SLI;
2161 ccw->cda = (__u32)(addr_t) ect;
2162 } else { /* write remaining records */
2163 for (i = 0; i < rpt; i++) {
2164 ect = (struct eckd_count *) data;
2165 data += sizeof(struct eckd_count);
2166 ect->cyl = address.cyl;
2167 ect->head = address.head;
2168 ect->record = i + 1;
2170 ect->dl = fdata->blksize;
2171 /* Check for special tracks 0-1 when formatting CDL */
2172 if ((intensity & 0x08) &&
2173 fdata->start_unit == 0) {
2176 ect->dl = sizes_trk0[i] - 4;
2179 if ((intensity & 0x08) &&
2180 fdata->start_unit == 1) {
2182 ect->dl = LABEL_SIZE - 44;
2184 ccw[-1].flags |= CCW_FLAG_CC;
2185 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD;
2186 ccw->flags = CCW_FLAG_SLI;
2188 ccw->cda = (__u32)(addr_t) ect;
2192 fcp->startdev = device;
2193 fcp->memdev = device;
2195 fcp->buildclk = get_clock();
2196 fcp->status = DASD_CQR_FILLED;
2200 static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr)
2202 cqr->status = DASD_CQR_FILLED;
2203 if (cqr->block && (cqr->startdev != cqr->block->base)) {
2204 dasd_eckd_reset_ccw_to_base_io(cqr);
2205 cqr->startdev = cqr->block->base;
2206 cqr->lpm = cqr->block->base->path_data.opm;
2210 static dasd_erp_fn_t
2211 dasd_eckd_erp_action(struct dasd_ccw_req * cqr)
2213 struct dasd_device *device = (struct dasd_device *) cqr->startdev;
2214 struct ccw_device *cdev = device->cdev;
2216 switch (cdev->id.cu_type) {
2221 return dasd_3990_erp_action;
2225 return dasd_default_erp_action;
2229 static dasd_erp_fn_t
2230 dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr)
2232 return dasd_default_erp_postaction;
2235 static void dasd_eckd_check_for_device_change(struct dasd_device *device,
2236 struct dasd_ccw_req *cqr,
2241 struct dasd_eckd_private *private;
2243 private = (struct dasd_eckd_private *) device->private;
2244 /* first of all check for state change pending interrupt */
2245 mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP;
2246 if ((scsw_dstat(&irb->scsw) & mask) == mask) {
2248 * for alias only, not in offline processing
2249 * and only if not suspended
2251 if (!device->block && private->lcu &&
2252 !test_bit(DASD_FLAG_OFFLINE, &device->flags) &&
2253 !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) {
2255 * the state change could be caused by an alias
2256 * reassignment remove device from alias handling
2257 * to prevent new requests from being scheduled on
2258 * the wrong alias device
2260 dasd_alias_remove_device(device);
2262 /* schedule worker to reload device */
2263 dasd_reload_device(device);
2265 dasd_generic_handle_state_change(device);
2269 sense = dasd_get_sense(irb);
2273 /* summary unit check */
2274 if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) &&
2275 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) {
2276 dasd_alias_handle_summary_unit_check(device, irb);
2280 /* service information message SIM */
2281 if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) &&
2282 ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) {
2283 dasd_3990_erp_handle_sim(device, sense);
2287 /* loss of device reservation is handled via base devices only
2288 * as alias devices may be used with several bases
2290 if (device->block && (sense[27] & DASD_SENSE_BIT_0) &&
2291 (sense[7] == 0x3F) &&
2292 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) &&
2293 test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) {
2294 if (device->features & DASD_FEATURE_FAILONSLCK)
2295 set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags);
2296 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags);
2297 dev_err(&device->cdev->dev,
2298 "The device reservation was lost\n");
2302 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single(
2303 struct dasd_device *startdev,
2304 struct dasd_block *block,
2305 struct request *req,
2310 unsigned int first_offs,
2311 unsigned int last_offs,
2312 unsigned int blk_per_trk,
2313 unsigned int blksize)
2315 struct dasd_eckd_private *private;
2316 unsigned long *idaws;
2317 struct LO_eckd_data *LO_data;
2318 struct dasd_ccw_req *cqr;
2320 struct req_iterator iter;
2324 int count, cidaw, cplength, datasize;
2326 unsigned char cmd, rcmd;
2328 struct dasd_device *basedev;
2330 basedev = block->base;
2331 private = (struct dasd_eckd_private *) basedev->private;
2332 if (rq_data_dir(req) == READ)
2333 cmd = DASD_ECKD_CCW_READ_MT;
2334 else if (rq_data_dir(req) == WRITE)
2335 cmd = DASD_ECKD_CCW_WRITE_MT;
2337 return ERR_PTR(-EINVAL);
2339 /* Check struct bio and count the number of blocks for the request. */
2342 rq_for_each_segment(bv, req, iter) {
2343 if (bv->bv_len & (blksize - 1))
2344 /* Eckd can only do full blocks. */
2345 return ERR_PTR(-EINVAL);
2346 count += bv->bv_len >> (block->s2b_shift + 9);
2347 #if defined(CONFIG_64BIT)
2348 if (idal_is_needed (page_address(bv->bv_page), bv->bv_len))
2349 cidaw += bv->bv_len >> (block->s2b_shift + 9);
2353 if (count != last_rec - first_rec + 1)
2354 return ERR_PTR(-EINVAL);
2356 /* use the prefix command if available */
2357 use_prefix = private->features.feature[8] & 0x01;
2359 /* 1x prefix + number of blocks */
2360 cplength = 2 + count;
2361 /* 1x prefix + cidaws*sizeof(long) */
2362 datasize = sizeof(struct PFX_eckd_data) +
2363 sizeof(struct LO_eckd_data) +
2364 cidaw * sizeof(unsigned long);
2366 /* 1x define extent + 1x locate record + number of blocks */
2367 cplength = 2 + count;
2368 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */
2369 datasize = sizeof(struct DE_eckd_data) +
2370 sizeof(struct LO_eckd_data) +
2371 cidaw * sizeof(unsigned long);
2373 /* Find out the number of additional locate record ccws for cdl. */
2374 if (private->uses_cdl && first_rec < 2*blk_per_trk) {
2375 if (last_rec >= 2*blk_per_trk)
2376 count = 2*blk_per_trk - first_rec;
2378 datasize += count*sizeof(struct LO_eckd_data);
2380 /* Allocate the ccw request. */
2381 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
2386 /* First ccw is define extent or prefix. */
2388 if (prefix(ccw++, cqr->data, first_trk,
2389 last_trk, cmd, basedev, startdev) == -EAGAIN) {
2390 /* Clock not in sync and XRC is enabled.
2393 dasd_sfree_request(cqr, startdev);
2394 return ERR_PTR(-EAGAIN);
2396 idaws = (unsigned long *) (cqr->data +
2397 sizeof(struct PFX_eckd_data));
2399 if (define_extent(ccw++, cqr->data, first_trk,
2400 last_trk, cmd, basedev) == -EAGAIN) {
2401 /* Clock not in sync and XRC is enabled.
2404 dasd_sfree_request(cqr, startdev);
2405 return ERR_PTR(-EAGAIN);
2407 idaws = (unsigned long *) (cqr->data +
2408 sizeof(struct DE_eckd_data));
2410 /* Build locate_record+read/write/ccws. */
2411 LO_data = (struct LO_eckd_data *) (idaws + cidaw);
2413 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) {
2414 /* Only standard blocks so there is just one locate record. */
2415 ccw[-1].flags |= CCW_FLAG_CC;
2416 locate_record(ccw++, LO_data++, first_trk, first_offs + 1,
2417 last_rec - recid + 1, cmd, basedev, blksize);
2419 rq_for_each_segment(bv, req, iter) {
2420 dst = page_address(bv->bv_page) + bv->bv_offset;
2421 if (dasd_page_cache) {
2422 char *copy = kmem_cache_alloc(dasd_page_cache,
2423 GFP_DMA | __GFP_NOWARN);
2424 if (copy && rq_data_dir(req) == WRITE)
2425 memcpy(copy + bv->bv_offset, dst, bv->bv_len);
2427 dst = copy + bv->bv_offset;
2429 for (off = 0; off < bv->bv_len; off += blksize) {
2430 sector_t trkid = recid;
2431 unsigned int recoffs = sector_div(trkid, blk_per_trk);
2434 /* Locate record for cdl special block ? */
2435 if (private->uses_cdl && recid < 2*blk_per_trk) {
2436 if (dasd_eckd_cdl_special(blk_per_trk, recid)){
2438 count = dasd_eckd_cdl_reclen(recid);
2439 if (count < blksize &&
2440 rq_data_dir(req) == READ)
2441 memset(dst + count, 0xe5,
2444 ccw[-1].flags |= CCW_FLAG_CC;
2445 locate_record(ccw++, LO_data++,
2447 1, rcmd, basedev, count);
2449 /* Locate record for standard blocks ? */
2450 if (private->uses_cdl && recid == 2*blk_per_trk) {
2451 ccw[-1].flags |= CCW_FLAG_CC;
2452 locate_record(ccw++, LO_data++,
2454 last_rec - recid + 1,
2455 cmd, basedev, count);
2457 /* Read/write ccw. */
2458 ccw[-1].flags |= CCW_FLAG_CC;
2459 ccw->cmd_code = rcmd;
2461 if (idal_is_needed(dst, blksize)) {
2462 ccw->cda = (__u32)(addr_t) idaws;
2463 ccw->flags = CCW_FLAG_IDA;
2464 idaws = idal_create_words(idaws, dst, blksize);
2466 ccw->cda = (__u32)(addr_t) dst;
2474 if (blk_noretry_request(req) ||
2475 block->base->features & DASD_FEATURE_FAILFAST)
2476 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
2477 cqr->startdev = startdev;
2478 cqr->memdev = startdev;
2480 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
2481 cqr->lpm = startdev->path_data.ppm;
2483 cqr->buildclk = get_clock();
2484 cqr->status = DASD_CQR_FILLED;
2488 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track(
2489 struct dasd_device *startdev,
2490 struct dasd_block *block,
2491 struct request *req,
2496 unsigned int first_offs,
2497 unsigned int last_offs,
2498 unsigned int blk_per_trk,
2499 unsigned int blksize)
2501 unsigned long *idaws;
2502 struct dasd_ccw_req *cqr;
2504 struct req_iterator iter;
2506 char *dst, *idaw_dst;
2507 unsigned int cidaw, cplength, datasize;
2511 struct dasd_device *basedev;
2512 unsigned int trkcount, count, count_to_trk_end;
2513 unsigned int idaw_len, seg_len, part_len, len_to_track_end;
2514 unsigned char new_track, end_idaw;
2516 unsigned int recoffs;
2518 basedev = block->base;
2519 if (rq_data_dir(req) == READ)
2520 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
2521 else if (rq_data_dir(req) == WRITE)
2522 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
2524 return ERR_PTR(-EINVAL);
2526 /* Track based I/O needs IDAWs for each page, and not just for
2527 * 64 bit addresses. We need additional idals for pages
2528 * that get filled from two tracks, so we use the number
2529 * of records as upper limit.
2531 cidaw = last_rec - first_rec + 1;
2532 trkcount = last_trk - first_trk + 1;
2534 /* 1x prefix + one read/write ccw per track */
2535 cplength = 1 + trkcount;
2537 /* on 31-bit we need space for two 32 bit addresses per page
2538 * on 64-bit one 64 bit address
2540 datasize = sizeof(struct PFX_eckd_data) +
2541 cidaw * sizeof(unsigned long long);
2543 /* Allocate the ccw request. */
2544 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
2549 /* transfer length factor: how many bytes to read from the last track */
2550 if (first_trk == last_trk)
2551 tlf = last_offs - first_offs + 1;
2553 tlf = last_offs + 1;
2556 if (prefix_LRE(ccw++, cqr->data, first_trk,
2557 last_trk, cmd, basedev, startdev,
2558 1 /* format */, first_offs + 1,
2561 /* Clock not in sync and XRC is enabled.
2564 dasd_sfree_request(cqr, startdev);
2565 return ERR_PTR(-EAGAIN);
2569 * The translation of request into ccw programs must meet the
2570 * following conditions:
2571 * - all idaws but the first and the last must address full pages
2572 * (or 2K blocks on 31-bit)
2573 * - the scope of a ccw and it's idal ends with the track boundaries
2575 idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data));
2579 len_to_track_end = 0;
2582 rq_for_each_segment(bv, req, iter) {
2583 dst = page_address(bv->bv_page) + bv->bv_offset;
2584 seg_len = bv->bv_len;
2588 recoffs = sector_div(trkid, blk_per_trk);
2589 count_to_trk_end = blk_per_trk - recoffs;
2590 count = min((last_rec - recid + 1),
2591 (sector_t)count_to_trk_end);
2592 len_to_track_end = count * blksize;
2593 ccw[-1].flags |= CCW_FLAG_CC;
2594 ccw->cmd_code = cmd;
2595 ccw->count = len_to_track_end;
2596 ccw->cda = (__u32)(addr_t)idaws;
2597 ccw->flags = CCW_FLAG_IDA;
2601 /* first idaw for a ccw may start anywhere */
2605 /* If we start a new idaw, we must make sure that it
2606 * starts on an IDA_BLOCK_SIZE boundary.
2607 * If we continue an idaw, we must make sure that the
2608 * current segment begins where the so far accumulated
2612 if (__pa(dst) & (IDA_BLOCK_SIZE-1)) {
2613 dasd_sfree_request(cqr, startdev);
2614 return ERR_PTR(-ERANGE);
2618 if ((idaw_dst + idaw_len) != dst) {
2619 dasd_sfree_request(cqr, startdev);
2620 return ERR_PTR(-ERANGE);
2622 part_len = min(seg_len, len_to_track_end);
2623 seg_len -= part_len;
2625 idaw_len += part_len;
2626 len_to_track_end -= part_len;
2627 /* collected memory area ends on an IDA_BLOCK border,
2629 * idal_create_words will handle cases where idaw_len
2630 * is larger then IDA_BLOCK_SIZE
2632 if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1)))
2634 /* We also need to end the idaw at track end */
2635 if (!len_to_track_end) {
2640 idaws = idal_create_words(idaws, idaw_dst,
2649 if (blk_noretry_request(req) ||
2650 block->base->features & DASD_FEATURE_FAILFAST)
2651 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
2652 cqr->startdev = startdev;
2653 cqr->memdev = startdev;
2655 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
2656 cqr->lpm = startdev->path_data.ppm;
2658 cqr->buildclk = get_clock();
2659 cqr->status = DASD_CQR_FILLED;
2663 static int prepare_itcw(struct itcw *itcw,
2664 unsigned int trk, unsigned int totrk, int cmd,
2665 struct dasd_device *basedev,
2666 struct dasd_device *startdev,
2667 unsigned int rec_on_trk, int count,
2668 unsigned int blksize,
2669 unsigned int total_data_size,
2671 unsigned int blk_per_trk)
2673 struct PFX_eckd_data pfxdata;
2674 struct dasd_eckd_private *basepriv, *startpriv;
2675 struct DE_eckd_data *dedata;
2676 struct LRE_eckd_data *lredata;
2680 u16 heads, beghead, endhead;
2688 /* setup prefix data */
2689 basepriv = (struct dasd_eckd_private *) basedev->private;
2690 startpriv = (struct dasd_eckd_private *) startdev->private;
2691 dedata = &pfxdata.define_extent;
2692 lredata = &pfxdata.locate_record;
2694 memset(&pfxdata, 0, sizeof(pfxdata));
2695 pfxdata.format = 1; /* PFX with LRE */
2696 pfxdata.base_address = basepriv->ned->unit_addr;
2697 pfxdata.base_lss = basepriv->ned->ID;
2698 pfxdata.validity.define_extent = 1;
2700 /* private uid is kept up to date, conf_data may be outdated */
2701 if (startpriv->uid.type != UA_BASE_DEVICE) {
2702 pfxdata.validity.verify_base = 1;
2703 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS)
2704 pfxdata.validity.hyper_pav = 1;
2708 case DASD_ECKD_CCW_READ_TRACK_DATA:
2709 dedata->mask.perm = 0x1;
2710 dedata->attributes.operation = basepriv->attrib.operation;
2711 dedata->blk_size = blksize;
2712 dedata->ga_extended |= 0x42;
2713 lredata->operation.orientation = 0x0;
2714 lredata->operation.operation = 0x0C;
2715 lredata->auxiliary.check_bytes = 0x01;
2716 pfx_cmd = DASD_ECKD_CCW_PFX_READ;
2718 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
2719 dedata->mask.perm = 0x02;
2720 dedata->attributes.operation = basepriv->attrib.operation;
2721 dedata->blk_size = blksize;
2722 rc = check_XRC_on_prefix(&pfxdata, basedev);
2723 dedata->ga_extended |= 0x42;
2724 lredata->operation.orientation = 0x0;
2725 lredata->operation.operation = 0x3F;
2726 lredata->extended_operation = 0x23;
2727 lredata->auxiliary.check_bytes = 0x2;
2728 pfx_cmd = DASD_ECKD_CCW_PFX;
2731 DBF_DEV_EVENT(DBF_ERR, basedev,
2732 "prepare itcw, unknown opcode 0x%x", cmd);
2739 dedata->attributes.mode = 0x3; /* ECKD */
2741 heads = basepriv->rdc_data.trk_per_cyl;
2742 begcyl = trk / heads;
2743 beghead = trk % heads;
2744 endcyl = totrk / heads;
2745 endhead = totrk % heads;
2747 /* check for sequential prestage - enhance cylinder range */
2748 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE ||
2749 dedata->attributes.operation == DASD_SEQ_ACCESS) {
2751 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl)
2752 endcyl += basepriv->attrib.nr_cyl;
2754 endcyl = (basepriv->real_cyl - 1);
2757 set_ch_t(&dedata->beg_ext, begcyl, beghead);
2758 set_ch_t(&dedata->end_ext, endcyl, endhead);
2760 dedata->ep_format = 0x20; /* records per track is valid */
2761 dedata->ep_rec_per_track = blk_per_trk;
2764 switch (basepriv->rdc_data.dev_type) {
2766 dn = ceil_quot(blksize + 6, 232);
2767 d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34);
2768 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
2771 d = 7 + ceil_quot(blksize + 12, 32);
2772 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
2777 lredata->auxiliary.length_valid = 1;
2778 lredata->auxiliary.length_scope = 1;
2779 lredata->auxiliary.imbedded_ccw_valid = 1;
2780 lredata->length = tlf;
2781 lredata->imbedded_ccw = cmd;
2782 lredata->count = count;
2783 lredata->sector = sector;
2784 set_ch_t(&lredata->seek_addr, begcyl, beghead);
2785 lredata->search_arg.cyl = lredata->seek_addr.cyl;
2786 lredata->search_arg.head = lredata->seek_addr.head;
2787 lredata->search_arg.record = rec_on_trk;
2789 dcw = itcw_add_dcw(itcw, pfx_cmd, 0,
2790 &pfxdata, sizeof(pfxdata), total_data_size);
2791 return IS_ERR(dcw) ? PTR_ERR(dcw) : 0;
2794 static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track(
2795 struct dasd_device *startdev,
2796 struct dasd_block *block,
2797 struct request *req,
2802 unsigned int first_offs,
2803 unsigned int last_offs,
2804 unsigned int blk_per_trk,
2805 unsigned int blksize)
2807 struct dasd_ccw_req *cqr;
2808 struct req_iterator iter;
2811 unsigned int trkcount, ctidaw;
2813 struct dasd_device *basedev;
2816 struct tidaw *last_tidaw = NULL;
2820 unsigned int seg_len, part_len, len_to_track_end;
2821 unsigned char new_track;
2822 sector_t recid, trkid;
2824 unsigned int count, count_to_trk_end;
2826 basedev = block->base;
2827 if (rq_data_dir(req) == READ) {
2828 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
2829 itcw_op = ITCW_OP_READ;
2830 } else if (rq_data_dir(req) == WRITE) {
2831 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
2832 itcw_op = ITCW_OP_WRITE;
2834 return ERR_PTR(-EINVAL);
2836 /* trackbased I/O needs address all memory via TIDAWs,
2837 * not just for 64 bit addresses. This allows us to map
2838 * each segment directly to one tidaw.
2839 * In the case of write requests, additional tidaws may
2840 * be needed when a segment crosses a track boundary.
2842 trkcount = last_trk - first_trk + 1;
2844 rq_for_each_segment(bv, req, iter) {
2847 if (rq_data_dir(req) == WRITE)
2848 ctidaw += (last_trk - first_trk);
2850 /* Allocate the ccw request. */
2851 itcw_size = itcw_calc_size(0, ctidaw, 0);
2852 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev);
2856 /* transfer length factor: how many bytes to read from the last track */
2857 if (first_trk == last_trk)
2858 tlf = last_offs - first_offs + 1;
2860 tlf = last_offs + 1;
2863 itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0);
2865 dasd_sfree_request(cqr, startdev);
2866 return ERR_PTR(-EINVAL);
2868 cqr->cpaddr = itcw_get_tcw(itcw);
2869 if (prepare_itcw(itcw, first_trk, last_trk,
2870 cmd, basedev, startdev,
2873 (last_rec - first_rec + 1) * blksize,
2874 tlf, blk_per_trk) == -EAGAIN) {
2875 /* Clock not in sync and XRC is enabled.
2878 dasd_sfree_request(cqr, startdev);
2879 return ERR_PTR(-EAGAIN);
2881 len_to_track_end = 0;
2883 * A tidaw can address 4k of memory, but must not cross page boundaries
2884 * We can let the block layer handle this by setting
2885 * blk_queue_segment_boundary to page boundaries and
2886 * blk_max_segment_size to page size when setting up the request queue.
2887 * For write requests, a TIDAW must not cross track boundaries, because
2888 * we have to set the CBC flag on the last tidaw for each track.
2890 if (rq_data_dir(req) == WRITE) {
2893 rq_for_each_segment(bv, req, iter) {
2894 dst = page_address(bv->bv_page) + bv->bv_offset;
2895 seg_len = bv->bv_len;
2899 offs = sector_div(trkid, blk_per_trk);
2900 count_to_trk_end = blk_per_trk - offs;
2901 count = min((last_rec - recid + 1),
2902 (sector_t)count_to_trk_end);
2903 len_to_track_end = count * blksize;
2907 part_len = min(seg_len, len_to_track_end);
2908 seg_len -= part_len;
2909 len_to_track_end -= part_len;
2910 /* We need to end the tidaw at track end */
2911 if (!len_to_track_end) {
2913 tidaw_flags = TIDAW_FLAGS_INSERT_CBC;
2916 last_tidaw = itcw_add_tidaw(itcw, tidaw_flags,
2918 if (IS_ERR(last_tidaw))
2919 return ERR_PTR(-EINVAL);
2924 rq_for_each_segment(bv, req, iter) {
2925 dst = page_address(bv->bv_page) + bv->bv_offset;
2926 last_tidaw = itcw_add_tidaw(itcw, 0x00,
2928 if (IS_ERR(last_tidaw))
2929 return ERR_PTR(-EINVAL);
2932 last_tidaw->flags |= TIDAW_FLAGS_LAST;
2933 last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC;
2934 itcw_finalize(itcw);
2936 if (blk_noretry_request(req) ||
2937 block->base->features & DASD_FEATURE_FAILFAST)
2938 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
2940 cqr->startdev = startdev;
2941 cqr->memdev = startdev;
2943 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
2944 cqr->lpm = startdev->path_data.ppm;
2946 cqr->buildclk = get_clock();
2947 cqr->status = DASD_CQR_FILLED;
2951 static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev,
2952 struct dasd_block *block,
2953 struct request *req)
2958 struct dasd_eckd_private *private;
2959 struct dasd_device *basedev;
2960 sector_t first_rec, last_rec;
2961 sector_t first_trk, last_trk;
2962 unsigned int first_offs, last_offs;
2963 unsigned int blk_per_trk, blksize;
2965 unsigned int data_size;
2966 struct dasd_ccw_req *cqr;
2968 basedev = block->base;
2969 private = (struct dasd_eckd_private *) basedev->private;
2971 /* Calculate number of blocks/records per track. */
2972 blksize = block->bp_block;
2973 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
2974 if (blk_per_trk == 0)
2975 return ERR_PTR(-EINVAL);
2976 /* Calculate record id of first and last block. */
2977 first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift;
2978 first_offs = sector_div(first_trk, blk_per_trk);
2979 last_rec = last_trk =
2980 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift;
2981 last_offs = sector_div(last_trk, blk_per_trk);
2982 cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk);
2984 fcx_multitrack = private->features.feature[40] & 0x20;
2985 data_size = blk_rq_bytes(req);
2986 /* tpm write request add CBC data on each track boundary */
2987 if (rq_data_dir(req) == WRITE)
2988 data_size += (last_trk - first_trk) * 4;
2990 /* is read track data and write track data in command mode supported? */
2991 cmdrtd = private->features.feature[9] & 0x20;
2992 cmdwtd = private->features.feature[12] & 0x40;
2993 use_prefix = private->features.feature[8] & 0x01;
2996 if (cdlspecial || dasd_page_cache) {
2997 /* do nothing, just fall through to the cmd mode single case */
2998 } else if ((data_size <= private->fcx_max_data)
2999 && (fcx_multitrack || (first_trk == last_trk))) {
3000 cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req,
3001 first_rec, last_rec,
3002 first_trk, last_trk,
3003 first_offs, last_offs,
3004 blk_per_trk, blksize);
3005 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) &&
3006 (PTR_ERR(cqr) != -ENOMEM))
3008 } else if (use_prefix &&
3009 (((rq_data_dir(req) == READ) && cmdrtd) ||
3010 ((rq_data_dir(req) == WRITE) && cmdwtd))) {
3011 cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req,
3012 first_rec, last_rec,
3013 first_trk, last_trk,
3014 first_offs, last_offs,
3015 blk_per_trk, blksize);
3016 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) &&
3017 (PTR_ERR(cqr) != -ENOMEM))
3021 cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req,
3022 first_rec, last_rec,
3023 first_trk, last_trk,
3024 first_offs, last_offs,
3025 blk_per_trk, blksize);
3029 static struct dasd_ccw_req *dasd_raw_build_cp(struct dasd_device *startdev,
3030 struct dasd_block *block,
3031 struct request *req)
3033 unsigned long *idaws;
3034 struct dasd_device *basedev;
3035 struct dasd_ccw_req *cqr;
3037 struct req_iterator iter;
3041 unsigned int trkcount;
3042 unsigned int seg_len, len_to_track_end;
3043 unsigned int first_offs;
3044 unsigned int cidaw, cplength, datasize;
3045 sector_t first_trk, last_trk;
3046 unsigned int pfx_datasize;
3049 * raw track access needs to be mutiple of 64k and on 64k boundary
3051 if ((blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK) != 0) {
3052 cqr = ERR_PTR(-EINVAL);
3055 if (((blk_rq_pos(req) + blk_rq_sectors(req)) %
3056 DASD_RAW_SECTORS_PER_TRACK) != 0) {
3057 cqr = ERR_PTR(-EINVAL);
3061 first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK;
3062 last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) /
3063 DASD_RAW_SECTORS_PER_TRACK;
3064 trkcount = last_trk - first_trk + 1;
3066 basedev = block->base;
3068 if (rq_data_dir(req) == READ)
3069 cmd = DASD_ECKD_CCW_READ_TRACK;
3070 else if (rq_data_dir(req) == WRITE)
3071 cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK;
3073 cqr = ERR_PTR(-EINVAL);
3078 * Raw track based I/O needs IDAWs for each page,
3079 * and not just for 64 bit addresses.
3081 cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK;
3083 /* 1x prefix + one read/write ccw per track */
3084 cplength = 1 + trkcount;
3087 * struct PFX_eckd_data has up to 2 byte as extended parameter
3088 * this is needed for write full track and has to be mentioned
3090 * add 8 instead of 2 to keep 8 byte boundary
3092 pfx_datasize = sizeof(struct PFX_eckd_data) + 8;
3094 datasize = pfx_datasize + cidaw * sizeof(unsigned long long);
3096 /* Allocate the ccw request. */
3097 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength,
3098 datasize, startdev);
3103 if (prefix_LRE(ccw++, cqr->data, first_trk, last_trk, cmd,
3104 basedev, startdev, 1 /* format */, first_offs + 1,
3105 trkcount, 0, 0) == -EAGAIN) {
3106 /* Clock not in sync and XRC is enabled.
3109 dasd_sfree_request(cqr, startdev);
3110 cqr = ERR_PTR(-EAGAIN);
3114 idaws = (unsigned long *)(cqr->data + pfx_datasize);
3116 len_to_track_end = 0;
3118 rq_for_each_segment(bv, req, iter) {
3119 dst = page_address(bv->bv_page) + bv->bv_offset;
3120 seg_len = bv->bv_len;
3121 if (!len_to_track_end) {
3122 ccw[-1].flags |= CCW_FLAG_CC;
3123 ccw->cmd_code = cmd;
3124 /* maximum 3390 track size */
3126 /* 64k map to one track */
3127 len_to_track_end = 65536;
3128 ccw->cda = (__u32)(addr_t)idaws;
3129 ccw->flags |= CCW_FLAG_IDA;
3130 ccw->flags |= CCW_FLAG_SLI;
3133 len_to_track_end -= seg_len;
3134 idaws = idal_create_words(idaws, dst, seg_len);
3137 if (blk_noretry_request(req) ||
3138 block->base->features & DASD_FEATURE_FAILFAST)
3139 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
3140 cqr->startdev = startdev;
3141 cqr->memdev = startdev;
3143 cqr->expires = startdev->default_expires * HZ;
3144 cqr->lpm = startdev->path_data.ppm;
3146 cqr->buildclk = get_clock();
3147 cqr->status = DASD_CQR_FILLED;
3149 if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN)
3157 dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req)
3159 struct dasd_eckd_private *private;
3161 struct req_iterator iter;
3164 unsigned int blksize, blk_per_trk, off;
3168 if (!dasd_page_cache)
3170 private = (struct dasd_eckd_private *) cqr->block->base->private;
3171 blksize = cqr->block->bp_block;
3172 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
3173 recid = blk_rq_pos(req) >> cqr->block->s2b_shift;
3175 /* Skip over define extent & locate record. */
3177 if (private->uses_cdl == 0 || recid > 2*blk_per_trk)
3179 rq_for_each_segment(bv, req, iter) {
3180 dst = page_address(bv->bv_page) + bv->bv_offset;
3181 for (off = 0; off < bv->bv_len; off += blksize) {
3182 /* Skip locate record. */
3183 if (private->uses_cdl && recid <= 2*blk_per_trk)
3186 if (ccw->flags & CCW_FLAG_IDA)
3187 cda = *((char **)((addr_t) ccw->cda));
3189 cda = (char *)((addr_t) ccw->cda);
3191 if (rq_data_dir(req) == READ)
3192 memcpy(dst, cda, bv->bv_len);
3193 kmem_cache_free(dasd_page_cache,
3194 (void *)((addr_t)cda & PAGE_MASK));
3203 status = cqr->status == DASD_CQR_DONE;
3204 dasd_sfree_request(cqr, cqr->memdev);
3209 * Modify ccw/tcw in cqr so it can be started on a base device.
3211 * Note that this is not enough to restart the cqr!
3212 * Either reset cqr->startdev as well (summary unit check handling)
3213 * or restart via separate cqr (as in ERP handling).
3215 void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr)
3218 struct PFX_eckd_data *pfxdata;
3223 if (cqr->cpmode == 1) {
3225 tccb = tcw_get_tccb(tcw);
3226 dcw = (struct dcw *)&tccb->tca[0];
3227 pfxdata = (struct PFX_eckd_data *)&dcw->cd[0];
3228 pfxdata->validity.verify_base = 0;
3229 pfxdata->validity.hyper_pav = 0;
3232 pfxdata = cqr->data;
3233 if (ccw->cmd_code == DASD_ECKD_CCW_PFX) {
3234 pfxdata->validity.verify_base = 0;
3235 pfxdata->validity.hyper_pav = 0;
3240 #define DASD_ECKD_CHANQ_MAX_SIZE 4
3242 static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base,
3243 struct dasd_block *block,
3244 struct request *req)
3246 struct dasd_eckd_private *private;
3247 struct dasd_device *startdev;
3248 unsigned long flags;
3249 struct dasd_ccw_req *cqr;
3251 startdev = dasd_alias_get_start_dev(base);
3254 private = (struct dasd_eckd_private *) startdev->private;
3255 if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE)
3256 return ERR_PTR(-EBUSY);
3258 spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags);
3260 if ((base->features & DASD_FEATURE_USERAW))
3261 cqr = dasd_raw_build_cp(startdev, block, req);
3263 cqr = dasd_eckd_build_cp(startdev, block, req);
3266 spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags);
3270 static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr,
3271 struct request *req)
3273 struct dasd_eckd_private *private;
3274 unsigned long flags;
3276 spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags);
3277 private = (struct dasd_eckd_private *) cqr->memdev->private;
3279 spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags);
3280 return dasd_eckd_free_cp(cqr, req);
3284 dasd_eckd_fill_info(struct dasd_device * device,
3285 struct dasd_information2_t * info)
3287 struct dasd_eckd_private *private;
3289 private = (struct dasd_eckd_private *) device->private;
3290 info->label_block = 2;
3291 info->FBA_layout = private->uses_cdl ? 0 : 1;
3292 info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL;
3293 info->characteristics_size = sizeof(struct dasd_eckd_characteristics);
3294 memcpy(info->characteristics, &private->rdc_data,
3295 sizeof(struct dasd_eckd_characteristics));
3296 info->confdata_size = min((unsigned long)private->conf_len,
3297 sizeof(info->configuration_data));
3298 memcpy(info->configuration_data, private->conf_data,
3299 info->confdata_size);
3304 * SECTION: ioctl functions for eckd devices.
3308 * Release device ioctl.
3309 * Buils a channel programm to releases a prior reserved
3310 * (see dasd_eckd_reserve) device.
3313 dasd_eckd_release(struct dasd_device *device)
3315 struct dasd_ccw_req *cqr;
3320 if (!capable(CAP_SYS_ADMIN))
3324 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
3326 mutex_lock(&dasd_reserve_mutex);
3328 cqr = &dasd_reserve_req->cqr;
3329 memset(cqr, 0, sizeof(*cqr));
3330 memset(&dasd_reserve_req->ccw, 0,
3331 sizeof(dasd_reserve_req->ccw));
3332 cqr->cpaddr = &dasd_reserve_req->ccw;
3333 cqr->data = &dasd_reserve_req->data;
3334 cqr->magic = DASD_ECKD_MAGIC;
3337 ccw->cmd_code = DASD_ECKD_CCW_RELEASE;
3338 ccw->flags |= CCW_FLAG_SLI;
3340 ccw->cda = (__u32)(addr_t) cqr->data;
3341 cqr->startdev = device;
3342 cqr->memdev = device;
3343 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
3344 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
3345 cqr->retries = 2; /* set retry counter to enable basic ERP */
3346 cqr->expires = 2 * HZ;
3347 cqr->buildclk = get_clock();
3348 cqr->status = DASD_CQR_FILLED;
3350 rc = dasd_sleep_on_immediatly(cqr);
3352 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags);
3355 mutex_unlock(&dasd_reserve_mutex);
3357 dasd_sfree_request(cqr, cqr->memdev);
3362 * Reserve device ioctl.
3363 * Options are set to 'synchronous wait for interrupt' and
3364 * 'timeout the request'. This leads to a terminate IO if
3365 * the interrupt is outstanding for a certain time.
3368 dasd_eckd_reserve(struct dasd_device *device)
3370 struct dasd_ccw_req *cqr;
3375 if (!capable(CAP_SYS_ADMIN))
3379 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
3381 mutex_lock(&dasd_reserve_mutex);
3383 cqr = &dasd_reserve_req->cqr;
3384 memset(cqr, 0, sizeof(*cqr));
3385 memset(&dasd_reserve_req->ccw, 0,
3386 sizeof(dasd_reserve_req->ccw));
3387 cqr->cpaddr = &dasd_reserve_req->ccw;
3388 cqr->data = &dasd_reserve_req->data;
3389 cqr->magic = DASD_ECKD_MAGIC;
3392 ccw->cmd_code = DASD_ECKD_CCW_RESERVE;
3393 ccw->flags |= CCW_FLAG_SLI;
3395 ccw->cda = (__u32)(addr_t) cqr->data;
3396 cqr->startdev = device;
3397 cqr->memdev = device;
3398 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
3399 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
3400 cqr->retries = 2; /* set retry counter to enable basic ERP */
3401 cqr->expires = 2 * HZ;
3402 cqr->buildclk = get_clock();
3403 cqr->status = DASD_CQR_FILLED;
3405 rc = dasd_sleep_on_immediatly(cqr);
3407 set_bit(DASD_FLAG_IS_RESERVED, &device->flags);
3410 mutex_unlock(&dasd_reserve_mutex);
3412 dasd_sfree_request(cqr, cqr->memdev);
3417 * Steal lock ioctl - unconditional reserve device.
3418 * Buils a channel programm to break a device's reservation.
3419 * (unconditional reserve)
3422 dasd_eckd_steal_lock(struct dasd_device *device)
3424 struct dasd_ccw_req *cqr;
3429 if (!capable(CAP_SYS_ADMIN))
3433 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
3435 mutex_lock(&dasd_reserve_mutex);
3437 cqr = &dasd_reserve_req->cqr;
3438 memset(cqr, 0, sizeof(*cqr));
3439 memset(&dasd_reserve_req->ccw, 0,
3440 sizeof(dasd_reserve_req->ccw));
3441 cqr->cpaddr = &dasd_reserve_req->ccw;
3442 cqr->data = &dasd_reserve_req->data;
3443 cqr->magic = DASD_ECKD_MAGIC;
3446 ccw->cmd_code = DASD_ECKD_CCW_SLCK;
3447 ccw->flags |= CCW_FLAG_SLI;
3449 ccw->cda = (__u32)(addr_t) cqr->data;
3450 cqr->startdev = device;
3451 cqr->memdev = device;
3452 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
3453 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
3454 cqr->retries = 2; /* set retry counter to enable basic ERP */
3455 cqr->expires = 2 * HZ;
3456 cqr->buildclk = get_clock();
3457 cqr->status = DASD_CQR_FILLED;
3459 rc = dasd_sleep_on_immediatly(cqr);
3461 set_bit(DASD_FLAG_IS_RESERVED, &device->flags);
3464 mutex_unlock(&dasd_reserve_mutex);
3466 dasd_sfree_request(cqr, cqr->memdev);
3471 * SNID - Sense Path Group ID
3472 * This ioctl may be used in situations where I/O is stalled due to
3473 * a reserve, so if the normal dasd_smalloc_request fails, we use the
3474 * preallocated dasd_reserve_req.
3476 static int dasd_eckd_snid(struct dasd_device *device,
3479 struct dasd_ccw_req *cqr;
3483 struct dasd_snid_ioctl_data usrparm;
3485 if (!capable(CAP_SYS_ADMIN))
3488 if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
3492 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1,
3493 sizeof(struct dasd_snid_data), device);
3495 mutex_lock(&dasd_reserve_mutex);
3497 cqr = &dasd_reserve_req->cqr;
3498 memset(cqr, 0, sizeof(*cqr));
3499 memset(&dasd_reserve_req->ccw, 0,
3500 sizeof(dasd_reserve_req->ccw));
3501 cqr->cpaddr = &dasd_reserve_req->ccw;
3502 cqr->data = &dasd_reserve_req->data;
3503 cqr->magic = DASD_ECKD_MAGIC;
3506 ccw->cmd_code = DASD_ECKD_CCW_SNID;
3507 ccw->flags |= CCW_FLAG_SLI;
3509 ccw->cda = (__u32)(addr_t) cqr->data;
3510 cqr->startdev = device;
3511 cqr->memdev = device;
3512 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
3513 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
3514 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags);
3516 cqr->expires = 10 * HZ;
3517 cqr->buildclk = get_clock();
3518 cqr->status = DASD_CQR_FILLED;
3519 cqr->lpm = usrparm.path_mask;
3521 rc = dasd_sleep_on_immediatly(cqr);
3522 /* verify that I/O processing didn't modify the path mask */
3523 if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask))
3526 usrparm.data = *((struct dasd_snid_data *)cqr->data);
3527 if (copy_to_user(argp, &usrparm, sizeof(usrparm)))
3532 mutex_unlock(&dasd_reserve_mutex);
3534 dasd_sfree_request(cqr, cqr->memdev);
3539 * Read performance statistics
3542 dasd_eckd_performance(struct dasd_device *device, void __user *argp)
3544 struct dasd_psf_prssd_data *prssdp;
3545 struct dasd_rssd_perf_stats_t *stats;
3546 struct dasd_ccw_req *cqr;
3550 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
3551 (sizeof(struct dasd_psf_prssd_data) +
3552 sizeof(struct dasd_rssd_perf_stats_t)),
3555 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
3556 "Could not allocate initialization request");
3557 return PTR_ERR(cqr);
3559 cqr->startdev = device;
3560 cqr->memdev = device;
3562 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
3563 cqr->expires = 10 * HZ;
3565 /* Prepare for Read Subsystem Data */
3566 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
3567 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
3568 prssdp->order = PSF_ORDER_PRSSD;
3569 prssdp->suborder = 0x01; /* Performance Statistics */
3570 prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */
3573 ccw->cmd_code = DASD_ECKD_CCW_PSF;
3574 ccw->count = sizeof(struct dasd_psf_prssd_data);
3575 ccw->flags |= CCW_FLAG_CC;
3576 ccw->cda = (__u32)(addr_t) prssdp;
3578 /* Read Subsystem Data - Performance Statistics */
3579 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
3580 memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t));
3583 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
3584 ccw->count = sizeof(struct dasd_rssd_perf_stats_t);
3585 ccw->cda = (__u32)(addr_t) stats;
3587 cqr->buildclk = get_clock();
3588 cqr->status = DASD_CQR_FILLED;
3589 rc = dasd_sleep_on(cqr);
3591 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
3592 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
3593 if (copy_to_user(argp, stats,
3594 sizeof(struct dasd_rssd_perf_stats_t)))
3597 dasd_sfree_request(cqr, cqr->memdev);
3602 * Get attributes (cache operations)
3603 * Returnes the cache attributes used in Define Extend (DE).
3606 dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp)
3608 struct dasd_eckd_private *private =
3609 (struct dasd_eckd_private *)device->private;
3610 struct attrib_data_t attrib = private->attrib;
3613 if (!capable(CAP_SYS_ADMIN))
3619 if (copy_to_user(argp, (long *) &attrib,
3620 sizeof(struct attrib_data_t)))
3627 * Set attributes (cache operations)
3628 * Stores the attributes for cache operation to be used in Define Extend (DE).
3631 dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp)
3633 struct dasd_eckd_private *private =
3634 (struct dasd_eckd_private *)device->private;
3635 struct attrib_data_t attrib;
3637 if (!capable(CAP_SYS_ADMIN))
3642 if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t)))
3644 private->attrib = attrib;
3646 dev_info(&device->cdev->dev,
3647 "The DASD cache mode was set to %x (%i cylinder prestage)\n",
3648 private->attrib.operation, private->attrib.nr_cyl);
3653 * Issue syscall I/O to EMC Symmetrix array.
3654 * CCWs are PSF and RSSD
3656 static int dasd_symm_io(struct dasd_device *device, void __user *argp)
3658 struct dasd_symmio_parms usrparm;
3659 char *psf_data, *rssd_result;
3660 struct dasd_ccw_req *cqr;
3665 if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
3669 /* Copy parms from caller */
3671 if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
3673 if (is_compat_task() || sizeof(long) == 4) {
3674 /* Make sure pointers are sane even on 31 bit. */
3676 if ((usrparm.psf_data >> 32) != 0)
3678 if ((usrparm.rssd_result >> 32) != 0)
3680 usrparm.psf_data &= 0x7fffffffULL;
3681 usrparm.rssd_result &= 0x7fffffffULL;
3683 /* alloc I/O data area */
3684 psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA);
3685 rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA);
3686 if (!psf_data || !rssd_result) {
3691 /* get syscall header from user space */
3693 if (copy_from_user(psf_data,
3694 (void __user *)(unsigned long) usrparm.psf_data,
3695 usrparm.psf_data_len))
3700 /* setup CCWs for PSF + RSSD */
3701 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device);
3703 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
3704 "Could not allocate initialization request");
3709 cqr->startdev = device;
3710 cqr->memdev = device;
3712 cqr->expires = 10 * HZ;
3713 cqr->buildclk = get_clock();
3714 cqr->status = DASD_CQR_FILLED;
3716 /* Build the ccws */
3720 ccw->cmd_code = DASD_ECKD_CCW_PSF;
3721 ccw->count = usrparm.psf_data_len;
3722 ccw->flags |= CCW_FLAG_CC;
3723 ccw->cda = (__u32)(addr_t) psf_data;
3728 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
3729 ccw->count = usrparm.rssd_result_len;
3730 ccw->flags = CCW_FLAG_SLI ;
3731 ccw->cda = (__u32)(addr_t) rssd_result;
3733 rc = dasd_sleep_on(cqr);
3738 if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result,
3739 rssd_result, usrparm.rssd_result_len))
3744 dasd_sfree_request(cqr, cqr->memdev);
3749 DBF_DEV_EVENT(DBF_WARNING, device,
3750 "Symmetrix ioctl (0x%02x 0x%02x): rc=%d",
3751 (int) psf0, (int) psf1, rc);
3756 dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp)
3758 struct dasd_device *device = block->base;
3762 return dasd_eckd_get_attrib(device, argp);
3764 return dasd_eckd_set_attrib(device, argp);
3766 return dasd_eckd_performance(device, argp);
3768 return dasd_eckd_release(device);
3770 return dasd_eckd_reserve(device);
3772 return dasd_eckd_steal_lock(device);
3774 return dasd_eckd_snid(device, argp);
3776 return dasd_symm_io(device, argp);
3778 return -ENOIOCTLCMD;
3783 * Dump the range of CCWs into 'page' buffer
3784 * and return number of printed chars.
3787 dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page)
3793 while (from <= to) {
3794 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3795 " CCW %p: %08X %08X DAT:",
3796 from, ((int *) from)[0], ((int *) from)[1]);
3798 /* get pointer to data (consider IDALs) */
3799 if (from->flags & CCW_FLAG_IDA)
3800 datap = (char *) *((addr_t *) (addr_t) from->cda);
3802 datap = (char *) ((addr_t) from->cda);
3804 /* dump data (max 32 bytes) */
3805 for (count = 0; count < from->count && count < 32; count++) {
3806 if (count % 8 == 0) len += sprintf(page + len, " ");
3807 if (count % 4 == 0) len += sprintf(page + len, " ");
3808 len += sprintf(page + len, "%02x", datap[count]);
3810 len += sprintf(page + len, "\n");
3817 dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb,
3823 sense = (u64 *) dasd_get_sense(irb);
3824 stat = (u64 *) &irb->scsw;
3826 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : "
3827 "%016llx %016llx %016llx %016llx",
3828 reason, *stat, *((u32 *) (stat + 1)),
3829 sense[0], sense[1], sense[2], sense[3]);
3831 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s",
3832 reason, *stat, *((u32 *) (stat + 1)),
3838 * Print sense data and related channel program.
3839 * Parts are printed because printk buffer is only 1024 bytes.
3841 static void dasd_eckd_dump_sense_ccw(struct dasd_device *device,
3842 struct dasd_ccw_req *req, struct irb *irb)
3845 struct ccw1 *first, *last, *fail, *from, *to;
3848 page = (char *) get_zeroed_page(GFP_ATOMIC);
3850 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
3851 "No memory to dump sense data\n");
3854 /* dump the sense data */
3855 len = sprintf(page, KERN_ERR PRINTK_HEADER
3856 " I/O status report for device %s:\n",
3857 dev_name(&device->cdev->dev));
3858 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3859 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X "
3861 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw),
3862 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw),
3863 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw),
3864 req ? req->intrc : 0);
3865 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3866 " device %s: Failing CCW: %p\n",
3867 dev_name(&device->cdev->dev),
3868 (void *) (addr_t) irb->scsw.cmd.cpa);
3869 if (irb->esw.esw0.erw.cons) {
3870 for (sl = 0; sl < 4; sl++) {
3871 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3872 " Sense(hex) %2d-%2d:",
3873 (8 * sl), ((8 * sl) + 7));
3875 for (sct = 0; sct < 8; sct++) {
3876 len += sprintf(page + len, " %02x",
3877 irb->ecw[8 * sl + sct]);
3879 len += sprintf(page + len, "\n");
3882 if (irb->ecw[27] & DASD_SENSE_BIT_0) {
3883 /* 24 Byte Sense Data */
3884 sprintf(page + len, KERN_ERR PRINTK_HEADER
3885 " 24 Byte: %x MSG %x, "
3886 "%s MSGb to SYSOP\n",
3887 irb->ecw[7] >> 4, irb->ecw[7] & 0x0f,
3888 irb->ecw[1] & 0x10 ? "" : "no");
3890 /* 32 Byte Sense Data */
3891 sprintf(page + len, KERN_ERR PRINTK_HEADER
3892 " 32 Byte: Format: %x "
3893 "Exception class %x\n",
3894 irb->ecw[6] & 0x0f, irb->ecw[22] >> 4);
3897 sprintf(page + len, KERN_ERR PRINTK_HEADER
3898 " SORRY - NO VALID SENSE AVAILABLE\n");
3903 /* req == NULL for unsolicited interrupts */
3904 /* dump the Channel Program (max 140 Bytes per line) */
3905 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */
3906 first = req->cpaddr;
3907 for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++);
3908 to = min(first + 6, last);
3909 len = sprintf(page, KERN_ERR PRINTK_HEADER
3910 " Related CP in req: %p\n", req);
3911 dasd_eckd_dump_ccw_range(first, to, page + len);
3914 /* print failing CCW area (maximum 4) */
3915 /* scsw->cda is either valid or zero */
3918 fail = (struct ccw1 *)(addr_t)
3919 irb->scsw.cmd.cpa; /* failing CCW */
3920 if (from < fail - 2) {
3921 from = fail - 2; /* there is a gap - print header */
3922 len += sprintf(page, KERN_ERR PRINTK_HEADER "......\n");
3924 to = min(fail + 1, last);
3925 len += dasd_eckd_dump_ccw_range(from, to, page + len);
3927 /* print last CCWs (maximum 2) */
3928 from = max(from, ++to);
3929 if (from < last - 1) {
3930 from = last - 1; /* there is a gap - print header */
3931 len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n");
3933 len += dasd_eckd_dump_ccw_range(from, last, page + len);
3937 free_page((unsigned long) page);
3942 * Print sense data from a tcw.
3944 static void dasd_eckd_dump_sense_tcw(struct dasd_device *device,
3945 struct dasd_ccw_req *req, struct irb *irb)
3948 int len, sl, sct, residual;
3952 page = (char *) get_zeroed_page(GFP_ATOMIC);
3954 DBF_DEV_EVENT(DBF_WARNING, device, " %s",
3955 "No memory to dump sense data");
3958 /* dump the sense data */
3959 len = sprintf(page, KERN_ERR PRINTK_HEADER
3960 " I/O status report for device %s:\n",
3961 dev_name(&device->cdev->dev));
3962 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3963 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X "
3964 "CS:%02X fcxs:%02X schxs:%02X RC:%d\n",
3965 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw),
3966 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw),
3967 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw),
3968 irb->scsw.tm.fcxs, irb->scsw.tm.schxs,
3969 req ? req->intrc : 0);
3970 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3971 " device %s: Failing TCW: %p\n",
3972 dev_name(&device->cdev->dev),
3973 (void *) (addr_t) irb->scsw.tm.tcw);
3977 if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01))
3979 (struct tcw *)(unsigned long)irb->scsw.tm.tcw);
3982 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3983 " tsb->length %d\n", tsb->length);
3984 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3985 " tsb->flags %x\n", tsb->flags);
3986 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3987 " tsb->dcw_offset %d\n", tsb->dcw_offset);
3988 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3989 " tsb->count %d\n", tsb->count);
3990 residual = tsb->count - 28;
3991 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3992 " residual %d\n", residual);
3994 switch (tsb->flags & 0x07) {
3995 case 1: /* tsa_iostat */
3996 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
3997 " tsb->tsa.iostat.dev_time %d\n",
3998 tsb->tsa.iostat.dev_time);
3999 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
4000 " tsb->tsa.iostat.def_time %d\n",
4001 tsb->tsa.iostat.def_time);
4002 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
4003 " tsb->tsa.iostat.queue_time %d\n",
4004 tsb->tsa.iostat.queue_time);
4005 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
4006 " tsb->tsa.iostat.dev_busy_time %d\n",
4007 tsb->tsa.iostat.dev_busy_time);
4008 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
4009 " tsb->tsa.iostat.dev_act_time %d\n",
4010 tsb->tsa.iostat.dev_act_time);
4011 sense = tsb->tsa.iostat.sense;
4013 case 2: /* ts_ddpc */
4014 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
4015 " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc);
4016 for (sl = 0; sl < 2; sl++) {
4017 len += sprintf(page + len,
4018 KERN_ERR PRINTK_HEADER
4019 " tsb->tsa.ddpc.rcq %2d-%2d: ",
4020 (8 * sl), ((8 * sl) + 7));
4021 rcq = tsb->tsa.ddpc.rcq;
4022 for (sct = 0; sct < 8; sct++) {
4023 len += sprintf(page + len, " %02x",
4026 len += sprintf(page + len, "\n");
4028 sense = tsb->tsa.ddpc.sense;
4030 case 3: /* tsa_intrg */
4031 len += sprintf(page + len, KERN_ERR PRINTK_HEADER
4032 " tsb->tsa.intrg.: not supportet yet \n");
4037 for (sl = 0; sl < 4; sl++) {
4038 len += sprintf(page + len,
4039 KERN_ERR PRINTK_HEADER
4040 " Sense(hex) %2d-%2d:",
4041 (8 * sl), ((8 * sl) + 7));
4042 for (sct = 0; sct < 8; sct++) {
4043 len += sprintf(page + len, " %02x",
4044 sense[8 * sl + sct]);
4046 len += sprintf(page + len, "\n");
4049 if (sense[27] & DASD_SENSE_BIT_0) {
4050 /* 24 Byte Sense Data */
4051 sprintf(page + len, KERN_ERR PRINTK_HEADER
4052 " 24 Byte: %x MSG %x, "
4053 "%s MSGb to SYSOP\n",
4054 sense[7] >> 4, sense[7] & 0x0f,
4055 sense[1] & 0x10 ? "" : "no");
4057 /* 32 Byte Sense Data */
4058 sprintf(page + len, KERN_ERR PRINTK_HEADER
4059 " 32 Byte: Format: %x "
4060 "Exception class %x\n",
4061 sense[6] & 0x0f, sense[22] >> 4);
4064 sprintf(page + len, KERN_ERR PRINTK_HEADER
4065 " SORRY - NO VALID SENSE AVAILABLE\n");
4068 sprintf(page + len, KERN_ERR PRINTK_HEADER
4069 " SORRY - NO TSB DATA AVAILABLE\n");
4072 free_page((unsigned long) page);
4075 static void dasd_eckd_dump_sense(struct dasd_device *device,
4076 struct dasd_ccw_req *req, struct irb *irb)
4078 if (scsw_is_tm(&irb->scsw))
4079 dasd_eckd_dump_sense_tcw(device, req, irb);
4081 dasd_eckd_dump_sense_ccw(device, req, irb);
4084 static int dasd_eckd_pm_freeze(struct dasd_device *device)
4087 * the device should be disconnected from our LCU structure
4088 * on restore we will reconnect it and reread LCU specific
4089 * information like PAV support that might have changed
4091 dasd_alias_remove_device(device);
4092 dasd_alias_disconnect_device_from_lcu(device);
4097 static int dasd_eckd_restore_device(struct dasd_device *device)
4099 struct dasd_eckd_private *private;
4100 struct dasd_eckd_characteristics temp_rdc_data;
4102 struct dasd_uid temp_uid;
4103 unsigned long flags;
4105 private = (struct dasd_eckd_private *) device->private;
4107 /* Read Configuration Data */
4108 rc = dasd_eckd_read_conf(device);
4112 dasd_eckd_get_uid(device, &temp_uid);
4113 /* Generate device unique id */
4114 rc = dasd_eckd_generate_uid(device);
4115 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
4116 if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0)
4117 dev_err(&device->cdev->dev, "The UID of the DASD has "
4119 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
4123 /* register lcu with alias handling, enable PAV if this is a new lcu */
4124 is_known = dasd_alias_make_device_known_to_lcu(device);
4128 dasd_eckd_validate_server(device);
4129 dasd_alias_lcu_setup_complete(device);
4131 dasd_alias_wait_for_lcu_setup(device);
4133 /* RE-Read Configuration Data */
4134 rc = dasd_eckd_read_conf(device);
4138 /* Read Feature Codes */
4139 dasd_eckd_read_features(device);
4141 /* Read Device Characteristics */
4142 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
4143 &temp_rdc_data, 64);
4145 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
4146 "Read device characteristic failed, rc=%d", rc);
4149 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
4150 memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data));
4151 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
4153 /* add device to alias management */
4154 dasd_alias_add_device(device);
4162 static int dasd_eckd_reload_device(struct dasd_device *device)
4164 struct dasd_eckd_private *private;
4167 struct dasd_uid uid;
4168 unsigned long flags;
4170 private = (struct dasd_eckd_private *) device->private;
4172 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
4173 old_base = private->uid.base_unit_addr;
4174 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
4176 /* Read Configuration Data */
4177 rc = dasd_eckd_read_conf(device);
4181 rc = dasd_eckd_generate_uid(device);
4185 * update unit address configuration and
4186 * add device to alias management
4188 dasd_alias_update_add_device(device);
4190 dasd_eckd_get_uid(device, &uid);
4192 if (old_base != uid.base_unit_addr) {
4193 if (strlen(uid.vduit) > 0)
4194 snprintf(print_uid, sizeof(print_uid),
4195 "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial,
4196 uid.ssid, uid.base_unit_addr, uid.vduit);
4198 snprintf(print_uid, sizeof(print_uid),
4199 "%s.%s.%04x.%02x", uid.vendor, uid.serial,
4200 uid.ssid, uid.base_unit_addr);
4202 dev_info(&device->cdev->dev,
4203 "An Alias device was reassigned to a new base device "
4204 "with UID: %s\n", print_uid);
4212 static struct ccw_driver dasd_eckd_driver = {
4214 .name = "dasd-eckd",
4215 .owner = THIS_MODULE,
4217 .ids = dasd_eckd_ids,
4218 .probe = dasd_eckd_probe,
4219 .remove = dasd_generic_remove,
4220 .set_offline = dasd_generic_set_offline,
4221 .set_online = dasd_eckd_set_online,
4222 .notify = dasd_generic_notify,
4223 .path_event = dasd_generic_path_event,
4224 .freeze = dasd_generic_pm_freeze,
4225 .thaw = dasd_generic_restore_device,
4226 .restore = dasd_generic_restore_device,
4227 .uc_handler = dasd_generic_uc_handler,
4228 .int_class = IOINT_DAS,
4232 * max_blocks is dependent on the amount of storage that is available
4233 * in the static io buffer for each device. Currently each device has
4234 * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has
4235 * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use
4236 * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In
4237 * addition we have one define extent ccw + 16 bytes of data and one
4238 * locate record ccw + 16 bytes of data. That makes:
4239 * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum.
4240 * We want to fit two into the available memory so that we can immediately
4241 * start the next request if one finishes off. That makes 249.5 blocks
4242 * for one request. Give a little safety and the result is 240.
4244 static struct dasd_discipline dasd_eckd_discipline = {
4245 .owner = THIS_MODULE,
4249 .check_device = dasd_eckd_check_characteristics,
4250 .uncheck_device = dasd_eckd_uncheck_device,
4251 .do_analysis = dasd_eckd_do_analysis,
4252 .verify_path = dasd_eckd_verify_path,
4253 .ready_to_online = dasd_eckd_ready_to_online,
4254 .online_to_ready = dasd_eckd_online_to_ready,
4255 .fill_geometry = dasd_eckd_fill_geometry,
4256 .start_IO = dasd_start_IO,
4257 .term_IO = dasd_term_IO,
4258 .handle_terminated_request = dasd_eckd_handle_terminated_request,
4259 .format_device = dasd_eckd_format_device,
4260 .erp_action = dasd_eckd_erp_action,
4261 .erp_postaction = dasd_eckd_erp_postaction,
4262 .check_for_device_change = dasd_eckd_check_for_device_change,
4263 .build_cp = dasd_eckd_build_alias_cp,
4264 .free_cp = dasd_eckd_free_alias_cp,
4265 .dump_sense = dasd_eckd_dump_sense,
4266 .dump_sense_dbf = dasd_eckd_dump_sense_dbf,
4267 .fill_info = dasd_eckd_fill_info,
4268 .ioctl = dasd_eckd_ioctl,
4269 .freeze = dasd_eckd_pm_freeze,
4270 .restore = dasd_eckd_restore_device,
4271 .reload = dasd_eckd_reload_device,
4272 .get_uid = dasd_eckd_get_uid,
4276 dasd_eckd_init(void)
4280 ASCEBC(dasd_eckd_discipline.ebcname, 4);
4281 dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req),
4282 GFP_KERNEL | GFP_DMA);
4283 if (!dasd_reserve_req)
4285 path_verification_worker = kmalloc(sizeof(*path_verification_worker),
4286 GFP_KERNEL | GFP_DMA);
4287 if (!path_verification_worker) {
4288 kfree(dasd_reserve_req);
4291 ret = ccw_driver_register(&dasd_eckd_driver);
4293 wait_for_device_probe();
4295 kfree(path_verification_worker);
4296 kfree(dasd_reserve_req);
4302 dasd_eckd_cleanup(void)
4304 ccw_driver_unregister(&dasd_eckd_driver);
4305 kfree(path_verification_worker);
4306 kfree(dasd_reserve_req);
4309 module_init(dasd_eckd_init);
4310 module_exit(dasd_eckd_cleanup);