2 * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
3 * Horst Hummel <Horst.Hummel@de.ibm.com>
4 * Carsten Otte <Cotte@de.ibm.com>
5 * Martin Schwidefsky <schwidefsky@de.ibm.com>
6 * Bugreports.to..: <Linux390@de.ibm.com>
7 * Copyright IBM Corp. 1999, 2009
8 * EMC Symmetrix ioctl Copyright EMC Corporation, 2008
9 * Author.........: Nigel Hislop <hislop_nigel@emc.com>
12 #define KMSG_COMPONENT "dasd-eckd"
14 #include <linux/stddef.h>
15 #include <linux/kernel.h>
16 #include <linux/slab.h>
17 #include <linux/hdreg.h> /* HDIO_GETGEO */
18 #include <linux/bio.h>
19 #include <linux/module.h>
20 #include <linux/compat.h>
21 #include <linux/init.h>
23 #include <asm/css_chars.h>
24 #include <asm/debug.h>
25 #include <asm/idals.h>
26 #include <asm/ebcdic.h>
28 #include <asm/uaccess.h>
30 #include <asm/ccwdev.h>
32 #include <asm/schid.h>
33 #include <asm/chpid.h>
36 #include "dasd_eckd.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 */
90 static void *rawpadpage;
93 #define INIT_CQR_UNFORMATTED 1
94 #define INIT_CQR_ERROR 2
96 /* emergency request for reserve/release */
98 struct dasd_ccw_req cqr;
102 static DEFINE_MUTEX(dasd_reserve_mutex);
104 /* definitions for the path verification worker */
105 struct path_verification_work_data {
106 struct work_struct worker;
107 struct dasd_device *device;
108 struct dasd_ccw_req cqr;
110 __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE];
114 static struct path_verification_work_data *path_verification_worker;
115 static DEFINE_MUTEX(dasd_path_verification_mutex);
117 struct check_attention_work_data {
118 struct work_struct worker;
119 struct dasd_device *device;
123 /* initial attempt at a probe function. this can be simplified once
124 * the other detection code is gone */
126 dasd_eckd_probe (struct ccw_device *cdev)
130 /* set ECKD specific ccw-device options */
131 ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE |
132 CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH);
134 DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s",
135 "dasd_eckd_probe: could not set "
136 "ccw-device options");
139 ret = dasd_generic_probe(cdev, &dasd_eckd_discipline);
144 dasd_eckd_set_online(struct ccw_device *cdev)
146 return dasd_generic_set_online(cdev, &dasd_eckd_discipline);
149 static const int sizes_trk0[] = { 28, 148, 84 };
150 #define LABEL_SIZE 140
152 /* head and record addresses of count_area read in analysis ccw */
153 static const int count_area_head[] = { 0, 0, 0, 0, 2 };
154 static const int count_area_rec[] = { 1, 2, 3, 4, 1 };
156 static inline unsigned int
157 round_up_multiple(unsigned int no, unsigned int mult)
160 return (rem ? no - rem + mult : no);
163 static inline unsigned int
164 ceil_quot(unsigned int d1, unsigned int d2)
166 return (d1 + (d2 - 1)) / d2;
170 recs_per_track(struct dasd_eckd_characteristics * rdc,
171 unsigned int kl, unsigned int dl)
175 switch (rdc->dev_type) {
178 return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) +
179 ceil_quot(dl + 12, 32));
181 return 1499 / (15 + ceil_quot(dl + 12, 32));
183 dn = ceil_quot(dl + 6, 232) + 1;
185 kn = ceil_quot(kl + 6, 232) + 1;
186 return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) +
187 9 + ceil_quot(dl + 6 * dn, 34));
189 return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34));
191 dn = ceil_quot(dl + 6, 232) + 1;
193 kn = ceil_quot(kl + 6, 232) + 1;
194 return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) +
195 ceil_quot(dl + 6 * dn, 34));
197 return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34));
202 static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head)
204 geo->cyl = (__u16) cyl;
205 geo->head = cyl >> 16;
211 check_XRC (struct ccw1 *de_ccw,
212 struct DE_eckd_data *data,
213 struct dasd_device *device)
215 struct dasd_eckd_private *private;
218 private = (struct dasd_eckd_private *) device->private;
219 if (!private->rdc_data.facilities.XRC_supported)
222 /* switch on System Time Stamp - needed for XRC Support */
223 data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */
224 data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */
226 rc = get_sync_clock(&data->ep_sys_time);
227 /* Ignore return code if sync clock is switched off. */
228 if (rc == -EOPNOTSUPP || rc == -EACCES)
231 de_ccw->count = sizeof(struct DE_eckd_data);
232 de_ccw->flags |= CCW_FLAG_SLI;
237 define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk,
238 unsigned int totrk, int cmd, struct dasd_device *device)
240 struct dasd_eckd_private *private;
242 u16 heads, beghead, endhead;
245 private = (struct dasd_eckd_private *) device->private;
247 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT;
250 ccw->cda = (__u32) __pa(data);
252 memset(data, 0, sizeof(struct DE_eckd_data));
254 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
255 case DASD_ECKD_CCW_READ_RECORD_ZERO:
256 case DASD_ECKD_CCW_READ:
257 case DASD_ECKD_CCW_READ_MT:
258 case DASD_ECKD_CCW_READ_CKD:
259 case DASD_ECKD_CCW_READ_CKD_MT:
260 case DASD_ECKD_CCW_READ_KD:
261 case DASD_ECKD_CCW_READ_KD_MT:
262 case DASD_ECKD_CCW_READ_COUNT:
263 data->mask.perm = 0x1;
264 data->attributes.operation = private->attrib.operation;
266 case DASD_ECKD_CCW_WRITE:
267 case DASD_ECKD_CCW_WRITE_MT:
268 case DASD_ECKD_CCW_WRITE_KD:
269 case DASD_ECKD_CCW_WRITE_KD_MT:
270 data->mask.perm = 0x02;
271 data->attributes.operation = private->attrib.operation;
272 rc = check_XRC (ccw, data, device);
274 case DASD_ECKD_CCW_WRITE_CKD:
275 case DASD_ECKD_CCW_WRITE_CKD_MT:
276 data->attributes.operation = DASD_BYPASS_CACHE;
277 rc = check_XRC (ccw, data, device);
279 case DASD_ECKD_CCW_ERASE:
280 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
281 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
282 data->mask.perm = 0x3;
283 data->mask.auth = 0x1;
284 data->attributes.operation = DASD_BYPASS_CACHE;
285 rc = check_XRC (ccw, data, device);
288 dev_err(&device->cdev->dev,
289 "0x%x is not a known command\n", cmd);
293 data->attributes.mode = 0x3; /* ECKD */
295 if ((private->rdc_data.cu_type == 0x2105 ||
296 private->rdc_data.cu_type == 0x2107 ||
297 private->rdc_data.cu_type == 0x1750)
298 && !(private->uses_cdl && trk < 2))
299 data->ga_extended |= 0x40; /* Regular Data Format Mode */
301 heads = private->rdc_data.trk_per_cyl;
302 begcyl = trk / heads;
303 beghead = trk % heads;
304 endcyl = totrk / heads;
305 endhead = totrk % heads;
307 /* check for sequential prestage - enhance cylinder range */
308 if (data->attributes.operation == DASD_SEQ_PRESTAGE ||
309 data->attributes.operation == DASD_SEQ_ACCESS) {
311 if (endcyl + private->attrib.nr_cyl < private->real_cyl)
312 endcyl += private->attrib.nr_cyl;
314 endcyl = (private->real_cyl - 1);
317 set_ch_t(&data->beg_ext, begcyl, beghead);
318 set_ch_t(&data->end_ext, endcyl, endhead);
322 static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata,
323 struct dasd_device *device)
325 struct dasd_eckd_private *private;
328 private = (struct dasd_eckd_private *) device->private;
329 if (!private->rdc_data.facilities.XRC_supported)
332 /* switch on System Time Stamp - needed for XRC Support */
333 pfxdata->define_extent.ga_extended |= 0x08; /* 'Time Stamp Valid' */
334 pfxdata->define_extent.ga_extended |= 0x02; /* 'Extended Parameter' */
335 pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */
337 rc = get_sync_clock(&pfxdata->define_extent.ep_sys_time);
338 /* Ignore return code if sync clock is switched off. */
339 if (rc == -EOPNOTSUPP || rc == -EACCES)
344 static void fill_LRE_data(struct LRE_eckd_data *data, unsigned int trk,
345 unsigned int rec_on_trk, int count, int cmd,
346 struct dasd_device *device, unsigned int reclen,
349 struct dasd_eckd_private *private;
353 private = (struct dasd_eckd_private *) device->private;
355 memset(data, 0, sizeof(*data));
358 switch (private->rdc_data.dev_type) {
360 dn = ceil_quot(reclen + 6, 232);
361 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
362 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
365 d = 7 + ceil_quot(reclen + 12, 32);
366 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
370 data->sector = sector;
371 /* note: meaning of count depends on the operation
372 * for record based I/O it's the number of records, but for
373 * track based I/O it's the number of tracks
377 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
378 data->operation.orientation = 0x3;
379 data->operation.operation = 0x03;
381 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
382 data->operation.orientation = 0x3;
383 data->operation.operation = 0x16;
385 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
386 data->operation.orientation = 0x1;
387 data->operation.operation = 0x03;
390 case DASD_ECKD_CCW_READ_RECORD_ZERO:
391 data->operation.orientation = 0x3;
392 data->operation.operation = 0x16;
395 case DASD_ECKD_CCW_WRITE:
396 case DASD_ECKD_CCW_WRITE_MT:
397 case DASD_ECKD_CCW_WRITE_KD:
398 case DASD_ECKD_CCW_WRITE_KD_MT:
399 data->auxiliary.length_valid = 0x1;
400 data->length = reclen;
401 data->operation.operation = 0x01;
403 case DASD_ECKD_CCW_WRITE_CKD:
404 case DASD_ECKD_CCW_WRITE_CKD_MT:
405 data->auxiliary.length_valid = 0x1;
406 data->length = reclen;
407 data->operation.operation = 0x03;
409 case DASD_ECKD_CCW_WRITE_FULL_TRACK:
410 data->operation.orientation = 0x0;
411 data->operation.operation = 0x3F;
412 data->extended_operation = 0x11;
414 data->extended_parameter_length = 0x02;
415 if (data->count > 8) {
416 data->extended_parameter[0] = 0xFF;
417 data->extended_parameter[1] = 0xFF;
418 data->extended_parameter[1] <<= (16 - count);
420 data->extended_parameter[0] = 0xFF;
421 data->extended_parameter[0] <<= (8 - count);
422 data->extended_parameter[1] = 0x00;
426 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
427 data->auxiliary.length_valid = 0x1;
428 data->length = reclen; /* not tlf, as one might think */
429 data->operation.operation = 0x3F;
430 data->extended_operation = 0x23;
432 case DASD_ECKD_CCW_READ:
433 case DASD_ECKD_CCW_READ_MT:
434 case DASD_ECKD_CCW_READ_KD:
435 case DASD_ECKD_CCW_READ_KD_MT:
436 data->auxiliary.length_valid = 0x1;
437 data->length = reclen;
438 data->operation.operation = 0x06;
440 case DASD_ECKD_CCW_READ_CKD:
441 case DASD_ECKD_CCW_READ_CKD_MT:
442 data->auxiliary.length_valid = 0x1;
443 data->length = reclen;
444 data->operation.operation = 0x16;
446 case DASD_ECKD_CCW_READ_COUNT:
447 data->operation.operation = 0x06;
449 case DASD_ECKD_CCW_READ_TRACK:
450 data->operation.orientation = 0x1;
451 data->operation.operation = 0x0C;
452 data->extended_parameter_length = 0;
455 case DASD_ECKD_CCW_READ_TRACK_DATA:
456 data->auxiliary.length_valid = 0x1;
458 data->operation.operation = 0x0C;
460 case DASD_ECKD_CCW_ERASE:
461 data->length = reclen;
462 data->auxiliary.length_valid = 0x1;
463 data->operation.operation = 0x0b;
466 DBF_DEV_EVENT(DBF_ERR, device,
467 "fill LRE unknown opcode 0x%x", cmd);
470 set_ch_t(&data->seek_addr,
471 trk / private->rdc_data.trk_per_cyl,
472 trk % private->rdc_data.trk_per_cyl);
473 data->search_arg.cyl = data->seek_addr.cyl;
474 data->search_arg.head = data->seek_addr.head;
475 data->search_arg.record = rec_on_trk;
478 static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
479 unsigned int trk, unsigned int totrk, int cmd,
480 struct dasd_device *basedev, struct dasd_device *startdev,
481 unsigned char format, unsigned int rec_on_trk, int count,
482 unsigned int blksize, unsigned int tlf)
484 struct dasd_eckd_private *basepriv, *startpriv;
485 struct DE_eckd_data *dedata;
486 struct LRE_eckd_data *lredata;
488 u16 heads, beghead, endhead;
491 basepriv = (struct dasd_eckd_private *) basedev->private;
492 startpriv = (struct dasd_eckd_private *) startdev->private;
493 dedata = &pfxdata->define_extent;
494 lredata = &pfxdata->locate_record;
496 ccw->cmd_code = DASD_ECKD_CCW_PFX;
498 if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) {
499 ccw->count = sizeof(*pfxdata) + 2;
500 ccw->cda = (__u32) __pa(pfxdata);
501 memset(pfxdata, 0, sizeof(*pfxdata) + 2);
503 ccw->count = sizeof(*pfxdata);
504 ccw->cda = (__u32) __pa(pfxdata);
505 memset(pfxdata, 0, sizeof(*pfxdata));
510 DBF_DEV_EVENT(DBF_ERR, basedev,
511 "PFX LRE unknown format 0x%x", format);
515 pfxdata->format = format;
516 pfxdata->base_address = basepriv->ned->unit_addr;
517 pfxdata->base_lss = basepriv->ned->ID;
518 pfxdata->validity.define_extent = 1;
520 /* private uid is kept up to date, conf_data may be outdated */
521 if (startpriv->uid.type == UA_BASE_PAV_ALIAS)
522 pfxdata->validity.verify_base = 1;
524 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) {
525 pfxdata->validity.verify_base = 1;
526 pfxdata->validity.hyper_pav = 1;
529 /* define extend data (mostly)*/
531 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
532 case DASD_ECKD_CCW_READ_RECORD_ZERO:
533 case DASD_ECKD_CCW_READ:
534 case DASD_ECKD_CCW_READ_MT:
535 case DASD_ECKD_CCW_READ_CKD:
536 case DASD_ECKD_CCW_READ_CKD_MT:
537 case DASD_ECKD_CCW_READ_KD:
538 case DASD_ECKD_CCW_READ_KD_MT:
539 case DASD_ECKD_CCW_READ_COUNT:
540 dedata->mask.perm = 0x1;
541 dedata->attributes.operation = basepriv->attrib.operation;
543 case DASD_ECKD_CCW_READ_TRACK:
544 case DASD_ECKD_CCW_READ_TRACK_DATA:
545 dedata->mask.perm = 0x1;
546 dedata->attributes.operation = basepriv->attrib.operation;
547 dedata->blk_size = 0;
549 case DASD_ECKD_CCW_WRITE:
550 case DASD_ECKD_CCW_WRITE_MT:
551 case DASD_ECKD_CCW_WRITE_KD:
552 case DASD_ECKD_CCW_WRITE_KD_MT:
553 dedata->mask.perm = 0x02;
554 dedata->attributes.operation = basepriv->attrib.operation;
555 rc = check_XRC_on_prefix(pfxdata, basedev);
557 case DASD_ECKD_CCW_WRITE_CKD:
558 case DASD_ECKD_CCW_WRITE_CKD_MT:
559 dedata->attributes.operation = DASD_BYPASS_CACHE;
560 rc = check_XRC_on_prefix(pfxdata, basedev);
562 case DASD_ECKD_CCW_ERASE:
563 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
564 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
565 dedata->mask.perm = 0x3;
566 dedata->mask.auth = 0x1;
567 dedata->attributes.operation = DASD_BYPASS_CACHE;
568 rc = check_XRC_on_prefix(pfxdata, basedev);
570 case DASD_ECKD_CCW_WRITE_FULL_TRACK:
571 dedata->mask.perm = 0x03;
572 dedata->attributes.operation = basepriv->attrib.operation;
573 dedata->blk_size = 0;
575 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
576 dedata->mask.perm = 0x02;
577 dedata->attributes.operation = basepriv->attrib.operation;
578 dedata->blk_size = blksize;
579 rc = check_XRC_on_prefix(pfxdata, basedev);
582 DBF_DEV_EVENT(DBF_ERR, basedev,
583 "PFX LRE unknown opcode 0x%x", cmd);
588 dedata->attributes.mode = 0x3; /* ECKD */
590 if ((basepriv->rdc_data.cu_type == 0x2105 ||
591 basepriv->rdc_data.cu_type == 0x2107 ||
592 basepriv->rdc_data.cu_type == 0x1750)
593 && !(basepriv->uses_cdl && trk < 2))
594 dedata->ga_extended |= 0x40; /* Regular Data Format Mode */
596 heads = basepriv->rdc_data.trk_per_cyl;
597 begcyl = trk / heads;
598 beghead = trk % heads;
599 endcyl = totrk / heads;
600 endhead = totrk % heads;
602 /* check for sequential prestage - enhance cylinder range */
603 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE ||
604 dedata->attributes.operation == DASD_SEQ_ACCESS) {
606 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl)
607 endcyl += basepriv->attrib.nr_cyl;
609 endcyl = (basepriv->real_cyl - 1);
612 set_ch_t(&dedata->beg_ext, begcyl, beghead);
613 set_ch_t(&dedata->end_ext, endcyl, endhead);
616 fill_LRE_data(lredata, trk, rec_on_trk, count, cmd,
617 basedev, blksize, tlf);
623 static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
624 unsigned int trk, unsigned int totrk, int cmd,
625 struct dasd_device *basedev, struct dasd_device *startdev)
627 return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev,
632 locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk,
633 unsigned int rec_on_trk, int no_rec, int cmd,
634 struct dasd_device * device, int reclen)
636 struct dasd_eckd_private *private;
640 private = (struct dasd_eckd_private *) device->private;
642 DBF_DEV_EVENT(DBF_INFO, device,
643 "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d",
644 trk, rec_on_trk, no_rec, cmd, reclen);
646 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD;
649 ccw->cda = (__u32) __pa(data);
651 memset(data, 0, sizeof(struct LO_eckd_data));
654 switch (private->rdc_data.dev_type) {
656 dn = ceil_quot(reclen + 6, 232);
657 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
658 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
661 d = 7 + ceil_quot(reclen + 12, 32);
662 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
666 data->sector = sector;
667 data->count = no_rec;
669 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
670 data->operation.orientation = 0x3;
671 data->operation.operation = 0x03;
673 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
674 data->operation.orientation = 0x3;
675 data->operation.operation = 0x16;
677 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
678 data->operation.orientation = 0x1;
679 data->operation.operation = 0x03;
682 case DASD_ECKD_CCW_READ_RECORD_ZERO:
683 data->operation.orientation = 0x3;
684 data->operation.operation = 0x16;
687 case DASD_ECKD_CCW_WRITE:
688 case DASD_ECKD_CCW_WRITE_MT:
689 case DASD_ECKD_CCW_WRITE_KD:
690 case DASD_ECKD_CCW_WRITE_KD_MT:
691 data->auxiliary.last_bytes_used = 0x1;
692 data->length = reclen;
693 data->operation.operation = 0x01;
695 case DASD_ECKD_CCW_WRITE_CKD:
696 case DASD_ECKD_CCW_WRITE_CKD_MT:
697 data->auxiliary.last_bytes_used = 0x1;
698 data->length = reclen;
699 data->operation.operation = 0x03;
701 case DASD_ECKD_CCW_READ:
702 case DASD_ECKD_CCW_READ_MT:
703 case DASD_ECKD_CCW_READ_KD:
704 case DASD_ECKD_CCW_READ_KD_MT:
705 data->auxiliary.last_bytes_used = 0x1;
706 data->length = reclen;
707 data->operation.operation = 0x06;
709 case DASD_ECKD_CCW_READ_CKD:
710 case DASD_ECKD_CCW_READ_CKD_MT:
711 data->auxiliary.last_bytes_used = 0x1;
712 data->length = reclen;
713 data->operation.operation = 0x16;
715 case DASD_ECKD_CCW_READ_COUNT:
716 data->operation.operation = 0x06;
718 case DASD_ECKD_CCW_ERASE:
719 data->length = reclen;
720 data->auxiliary.last_bytes_used = 0x1;
721 data->operation.operation = 0x0b;
724 DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record "
727 set_ch_t(&data->seek_addr,
728 trk / private->rdc_data.trk_per_cyl,
729 trk % private->rdc_data.trk_per_cyl);
730 data->search_arg.cyl = data->seek_addr.cyl;
731 data->search_arg.head = data->seek_addr.head;
732 data->search_arg.record = rec_on_trk;
736 * Returns 1 if the block is one of the special blocks that needs
737 * to get read/written with the KD variant of the command.
738 * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and
739 * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT.
740 * Luckily the KD variants differ only by one bit (0x08) from the
741 * normal variant. So don't wonder about code like:
742 * if (dasd_eckd_cdl_special(blk_per_trk, recid))
743 * ccw->cmd_code |= 0x8;
746 dasd_eckd_cdl_special(int blk_per_trk, int recid)
750 if (recid < blk_per_trk)
752 if (recid < 2 * blk_per_trk)
758 * Returns the record size for the special blocks of the cdl format.
759 * Only returns something useful if dasd_eckd_cdl_special is true
763 dasd_eckd_cdl_reclen(int recid)
766 return sizes_trk0[recid];
769 /* create unique id from private structure. */
770 static void create_uid(struct dasd_eckd_private *private)
773 struct dasd_uid *uid;
776 memset(uid, 0, sizeof(struct dasd_uid));
777 memcpy(uid->vendor, private->ned->HDA_manufacturer,
778 sizeof(uid->vendor) - 1);
779 EBCASC(uid->vendor, sizeof(uid->vendor) - 1);
780 memcpy(uid->serial, private->ned->HDA_location,
781 sizeof(uid->serial) - 1);
782 EBCASC(uid->serial, sizeof(uid->serial) - 1);
783 uid->ssid = private->gneq->subsystemID;
784 uid->real_unit_addr = private->ned->unit_addr;
786 uid->type = private->sneq->sua_flags;
787 if (uid->type == UA_BASE_PAV_ALIAS)
788 uid->base_unit_addr = private->sneq->base_unit_addr;
790 uid->type = UA_BASE_DEVICE;
792 if (private->vdsneq) {
793 for (count = 0; count < 16; count++) {
794 sprintf(uid->vduit+2*count, "%02x",
795 private->vdsneq->uit[count]);
801 * Generate device unique id that specifies the physical device.
803 static int dasd_eckd_generate_uid(struct dasd_device *device)
805 struct dasd_eckd_private *private;
808 private = (struct dasd_eckd_private *) device->private;
811 if (!private->ned || !private->gneq)
813 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
815 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
819 static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid)
821 struct dasd_eckd_private *private;
824 if (device->private) {
825 private = (struct dasd_eckd_private *)device->private;
826 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
828 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
835 * compare device UID with data of a given dasd_eckd_private structure
838 static int dasd_eckd_compare_path_uid(struct dasd_device *device,
839 struct dasd_eckd_private *private)
841 struct dasd_uid device_uid;
844 dasd_eckd_get_uid(device, &device_uid);
846 return memcmp(&device_uid, &private->uid, sizeof(struct dasd_uid));
849 static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device,
850 struct dasd_ccw_req *cqr,
856 * buffer has to start with EBCDIC "V1.0" to show
857 * support for virtual device SNEQ
859 rcd_buffer[0] = 0xE5;
860 rcd_buffer[1] = 0xF1;
861 rcd_buffer[2] = 0x4B;
862 rcd_buffer[3] = 0xF0;
865 ccw->cmd_code = DASD_ECKD_CCW_RCD;
867 ccw->cda = (__u32)(addr_t)rcd_buffer;
868 ccw->count = DASD_ECKD_RCD_DATA_SIZE;
869 cqr->magic = DASD_ECKD_MAGIC;
871 cqr->startdev = device;
872 cqr->memdev = device;
874 cqr->expires = 10*HZ;
877 cqr->buildclk = get_tod_clock();
878 cqr->status = DASD_CQR_FILLED;
879 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags);
883 * Wakeup helper for read_conf
884 * if the cqr is not done and needs some error recovery
885 * the buffer has to be re-initialized with the EBCDIC "V1.0"
886 * to show support for virtual device SNEQ
888 static void read_conf_cb(struct dasd_ccw_req *cqr, void *data)
893 if (cqr->status != DASD_CQR_DONE) {
895 rcd_buffer = (__u8 *)((addr_t) ccw->cda);
896 memset(rcd_buffer, 0, sizeof(*rcd_buffer));
898 rcd_buffer[0] = 0xE5;
899 rcd_buffer[1] = 0xF1;
900 rcd_buffer[2] = 0x4B;
901 rcd_buffer[3] = 0xF0;
903 dasd_wakeup_cb(cqr, data);
906 static int dasd_eckd_read_conf_immediately(struct dasd_device *device,
907 struct dasd_ccw_req *cqr,
914 * sanity check: scan for RCD command in extended SenseID data
915 * some devices do not support RCD
917 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD);
918 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD)
921 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm);
922 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
923 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags);
925 cqr->callback = read_conf_cb;
926 rc = dasd_sleep_on_immediatly(cqr);
930 static int dasd_eckd_read_conf_lpm(struct dasd_device *device,
932 int *rcd_buffer_size, __u8 lpm)
935 char *rcd_buf = NULL;
937 struct dasd_ccw_req *cqr;
940 * sanity check: scan for RCD command in extended SenseID data
941 * some devices do not support RCD
943 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD);
944 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) {
948 rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA);
953 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */,
954 0, /* use rcd_buf as data ara */
957 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
958 "Could not allocate RCD request");
962 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm);
963 cqr->callback = read_conf_cb;
964 ret = dasd_sleep_on(cqr);
966 * on success we update the user input parms
968 dasd_sfree_request(cqr, cqr->memdev);
972 *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE;
973 *rcd_buffer = rcd_buf;
978 *rcd_buffer_size = 0;
982 static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private)
985 struct dasd_sneq *sneq;
989 private->sneq = NULL;
990 private->vdsneq = NULL;
991 private->gneq = NULL;
992 count = private->conf_len / sizeof(struct dasd_sneq);
993 sneq = (struct dasd_sneq *)private->conf_data;
994 for (i = 0; i < count; ++i) {
995 if (sneq->flags.identifier == 1 && sneq->format == 1)
996 private->sneq = sneq;
997 else if (sneq->flags.identifier == 1 && sneq->format == 4)
998 private->vdsneq = (struct vd_sneq *)sneq;
999 else if (sneq->flags.identifier == 2)
1000 private->gneq = (struct dasd_gneq *)sneq;
1001 else if (sneq->flags.identifier == 3 && sneq->res1 == 1)
1002 private->ned = (struct dasd_ned *)sneq;
1005 if (!private->ned || !private->gneq) {
1006 private->ned = NULL;
1007 private->sneq = NULL;
1008 private->vdsneq = NULL;
1009 private->gneq = NULL;
1016 static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len)
1018 struct dasd_gneq *gneq;
1019 int i, count, found;
1021 count = conf_len / sizeof(*gneq);
1022 gneq = (struct dasd_gneq *)conf_data;
1024 for (i = 0; i < count; ++i) {
1025 if (gneq->flags.identifier == 2) {
1032 return ((char *)gneq)[18] & 0x07;
1037 static void dasd_eckd_clear_conf_data(struct dasd_device *device)
1039 struct dasd_eckd_private *private;
1042 private = (struct dasd_eckd_private *) device->private;
1043 private->conf_data = NULL;
1044 private->conf_len = 0;
1045 for (i = 0; i < 8; i++) {
1046 kfree(private->path_conf_data[i]);
1047 private->path_conf_data[i] = NULL;
1052 static int dasd_eckd_read_conf(struct dasd_device *device)
1055 int conf_len, conf_data_saved;
1056 int rc, path_err, pos;
1058 struct dasd_eckd_private *private, path_private;
1059 struct dasd_path *path_data;
1060 struct dasd_uid *uid;
1061 char print_path_uid[60], print_device_uid[60];
1063 private = (struct dasd_eckd_private *) device->private;
1064 path_data = &device->path_data;
1065 opm = ccw_device_get_path_mask(device->cdev);
1066 conf_data_saved = 0;
1068 /* get configuration data per operational path */
1069 for (lpm = 0x80; lpm; lpm>>= 1) {
1072 rc = dasd_eckd_read_conf_lpm(device, &conf_data,
1074 if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */
1075 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1076 "Read configuration data returned "
1080 if (conf_data == NULL) {
1081 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1082 "No configuration data "
1084 /* no further analysis possible */
1085 path_data->opm |= lpm;
1086 continue; /* no error */
1088 /* save first valid configuration data */
1089 if (!conf_data_saved) {
1090 /* initially clear previously stored conf_data */
1091 dasd_eckd_clear_conf_data(device);
1092 private->conf_data = conf_data;
1093 private->conf_len = conf_len;
1094 if (dasd_eckd_identify_conf_parts(private)) {
1095 private->conf_data = NULL;
1096 private->conf_len = 0;
1100 pos = pathmask_to_pos(lpm);
1101 /* store per path conf_data */
1102 private->path_conf_data[pos] =
1103 (struct dasd_conf_data *) conf_data;
1105 * build device UID that other path data
1106 * can be compared to it
1108 dasd_eckd_generate_uid(device);
1111 path_private.conf_data = conf_data;
1112 path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE;
1113 if (dasd_eckd_identify_conf_parts(
1115 path_private.conf_data = NULL;
1116 path_private.conf_len = 0;
1120 if (dasd_eckd_compare_path_uid(
1121 device, &path_private)) {
1122 uid = &path_private.uid;
1123 if (strlen(uid->vduit) > 0)
1124 snprintf(print_path_uid,
1125 sizeof(print_path_uid),
1126 "%s.%s.%04x.%02x.%s",
1127 uid->vendor, uid->serial,
1128 uid->ssid, uid->real_unit_addr,
1131 snprintf(print_path_uid,
1132 sizeof(print_path_uid),
1134 uid->vendor, uid->serial,
1136 uid->real_unit_addr);
1137 uid = &private->uid;
1138 if (strlen(uid->vduit) > 0)
1139 snprintf(print_device_uid,
1140 sizeof(print_device_uid),
1141 "%s.%s.%04x.%02x.%s",
1142 uid->vendor, uid->serial,
1143 uid->ssid, uid->real_unit_addr,
1146 snprintf(print_device_uid,
1147 sizeof(print_device_uid),
1149 uid->vendor, uid->serial,
1151 uid->real_unit_addr);
1152 dev_err(&device->cdev->dev,
1153 "Not all channel paths lead to "
1154 "the same device, path %02X leads to "
1155 "device %s instead of %s\n", lpm,
1156 print_path_uid, print_device_uid);
1158 path_data->cablepm |= lpm;
1161 pos = pathmask_to_pos(lpm);
1162 /* store per path conf_data */
1163 private->path_conf_data[pos] =
1164 (struct dasd_conf_data *) conf_data;
1165 path_private.conf_data = NULL;
1166 path_private.conf_len = 0;
1168 switch (dasd_eckd_path_access(conf_data, conf_len)) {
1170 path_data->npm |= lpm;
1173 path_data->ppm |= lpm;
1176 if (!path_data->opm) {
1177 path_data->opm = lpm;
1178 dasd_generic_path_operational(device);
1180 path_data->opm |= lpm;
1183 * if the path is used
1184 * it should not be in one of the negative lists
1186 path_data->cablepm &= ~lpm;
1187 path_data->hpfpm &= ~lpm;
1188 path_data->cuirpm &= ~lpm;
1194 static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm)
1196 struct dasd_eckd_private *private;
1200 private = (struct dasd_eckd_private *) device->private;
1201 if (private->fcx_max_data) {
1202 mdc = ccw_device_get_mdc(device->cdev, lpm);
1204 dev_warn(&device->cdev->dev,
1205 "Detecting the maximum data size for zHPF "
1206 "requests failed (rc=%d) for a new path %x\n",
1210 fcx_max_data = mdc * FCX_MAX_DATA_FACTOR;
1211 if (fcx_max_data < private->fcx_max_data) {
1212 dev_warn(&device->cdev->dev,
1213 "The maximum data size for zHPF requests %u "
1214 "on a new path %x is below the active maximum "
1215 "%u\n", fcx_max_data, lpm,
1216 private->fcx_max_data);
1223 static int rebuild_device_uid(struct dasd_device *device,
1224 struct path_verification_work_data *data)
1226 struct dasd_eckd_private *private;
1227 struct dasd_path *path_data;
1232 private = (struct dasd_eckd_private *) device->private;
1233 path_data = &device->path_data;
1234 opm = device->path_data.opm;
1236 for (lpm = 0x80; lpm; lpm >>= 1) {
1239 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer));
1240 memset(&data->cqr, 0, sizeof(data->cqr));
1241 data->cqr.cpaddr = &data->ccw;
1242 rc = dasd_eckd_read_conf_immediately(device, &data->cqr,
1247 if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */
1249 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1250 "Read configuration data "
1251 "returned error %d", rc);
1254 memcpy(private->conf_data, data->rcd_buffer,
1255 DASD_ECKD_RCD_DATA_SIZE);
1256 if (dasd_eckd_identify_conf_parts(private)) {
1258 } else /* first valid path is enough */
1263 rc = dasd_eckd_generate_uid(device);
1268 static void do_path_verification_work(struct work_struct *work)
1270 struct path_verification_work_data *data;
1271 struct dasd_device *device;
1272 struct dasd_eckd_private path_private;
1273 struct dasd_uid *uid;
1274 __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE];
1275 __u8 lpm, opm, npm, ppm, epm, hpfpm, cablepm;
1276 unsigned long flags;
1280 data = container_of(work, struct path_verification_work_data, worker);
1281 device = data->device;
1283 /* delay path verification until device was resumed */
1284 if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) {
1285 schedule_work(work);
1288 /* check if path verification already running and delay if so */
1289 if (test_and_set_bit(DASD_FLAG_PATH_VERIFY, &device->flags)) {
1290 schedule_work(work);
1300 for (lpm = 0x80; lpm; lpm >>= 1) {
1301 if (!(lpm & data->tbvpm))
1303 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer));
1304 memset(&data->cqr, 0, sizeof(data->cqr));
1305 data->cqr.cpaddr = &data->ccw;
1306 rc = dasd_eckd_read_conf_immediately(device, &data->cqr,
1310 switch (dasd_eckd_path_access(data->rcd_buffer,
1311 DASD_ECKD_RCD_DATA_SIZE)
1321 } else if (rc == -EOPNOTSUPP) {
1322 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1323 "path verification: No configuration "
1326 } else if (rc == -EAGAIN) {
1327 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1328 "path verification: device is stopped,"
1329 " try again later");
1332 dev_warn(&device->cdev->dev,
1333 "Reading device feature codes failed "
1334 "(rc=%d) for new path %x\n", rc, lpm);
1337 if (verify_fcx_max_data(device, lpm)) {
1346 * save conf_data for comparison after
1347 * rebuild_device_uid may have changed
1350 memcpy(&path_rcd_buf, data->rcd_buffer,
1351 DASD_ECKD_RCD_DATA_SIZE);
1352 path_private.conf_data = (void *) &path_rcd_buf;
1353 path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE;
1354 if (dasd_eckd_identify_conf_parts(&path_private)) {
1355 path_private.conf_data = NULL;
1356 path_private.conf_len = 0;
1361 * compare path UID with device UID only if at least
1362 * one valid path is left
1363 * in other case the device UID may have changed and
1364 * the first working path UID will be used as device UID
1366 if (device->path_data.opm &&
1367 dasd_eckd_compare_path_uid(device, &path_private)) {
1369 * the comparison was not successful
1370 * rebuild the device UID with at least one
1371 * known path in case a z/VM hyperswap command
1372 * has changed the device
1374 * after this compare again
1376 * if either the rebuild or the recompare fails
1377 * the path can not be used
1379 if (rebuild_device_uid(device, data) ||
1380 dasd_eckd_compare_path_uid(
1381 device, &path_private)) {
1382 uid = &path_private.uid;
1383 if (strlen(uid->vduit) > 0)
1384 snprintf(print_uid, sizeof(print_uid),
1385 "%s.%s.%04x.%02x.%s",
1386 uid->vendor, uid->serial,
1387 uid->ssid, uid->real_unit_addr,
1390 snprintf(print_uid, sizeof(print_uid),
1392 uid->vendor, uid->serial,
1394 uid->real_unit_addr);
1395 dev_err(&device->cdev->dev,
1396 "The newly added channel path %02X "
1397 "will not be used because it leads "
1398 "to a different device %s\n",
1409 * There is a small chance that a path is lost again between
1410 * above path verification and the following modification of
1411 * the device opm mask. We could avoid that race here by using
1412 * yet another path mask, but we rather deal with this unlikely
1413 * situation in dasd_start_IO.
1415 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
1416 if (!device->path_data.opm && opm) {
1417 device->path_data.opm = opm;
1418 device->path_data.cablepm &= ~opm;
1419 device->path_data.cuirpm &= ~opm;
1420 device->path_data.hpfpm &= ~opm;
1421 dasd_generic_path_operational(device);
1423 device->path_data.opm |= opm;
1424 device->path_data.cablepm &= ~opm;
1425 device->path_data.cuirpm &= ~opm;
1426 device->path_data.hpfpm &= ~opm;
1428 device->path_data.npm |= npm;
1429 device->path_data.ppm |= ppm;
1430 device->path_data.tbvpm |= epm;
1431 device->path_data.cablepm |= cablepm;
1432 device->path_data.hpfpm |= hpfpm;
1433 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
1435 clear_bit(DASD_FLAG_PATH_VERIFY, &device->flags);
1436 dasd_put_device(device);
1438 mutex_unlock(&dasd_path_verification_mutex);
1443 static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm)
1445 struct path_verification_work_data *data;
1447 data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA);
1449 if (mutex_trylock(&dasd_path_verification_mutex)) {
1450 data = path_verification_worker;
1455 memset(data, 0, sizeof(*data));
1458 INIT_WORK(&data->worker, do_path_verification_work);
1459 dasd_get_device(device);
1460 data->device = device;
1462 schedule_work(&data->worker);
1466 static int dasd_eckd_read_features(struct dasd_device *device)
1468 struct dasd_psf_prssd_data *prssdp;
1469 struct dasd_rssd_features *features;
1470 struct dasd_ccw_req *cqr;
1473 struct dasd_eckd_private *private;
1475 private = (struct dasd_eckd_private *) device->private;
1476 memset(&private->features, 0, sizeof(struct dasd_rssd_features));
1477 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
1478 (sizeof(struct dasd_psf_prssd_data) +
1479 sizeof(struct dasd_rssd_features)),
1482 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not "
1483 "allocate initialization request");
1484 return PTR_ERR(cqr);
1486 cqr->startdev = device;
1487 cqr->memdev = device;
1490 cqr->expires = 10 * HZ;
1492 /* Prepare for Read Subsystem Data */
1493 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
1494 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
1495 prssdp->order = PSF_ORDER_PRSSD;
1496 prssdp->suborder = 0x41; /* Read Feature Codes */
1497 /* all other bytes of prssdp must be zero */
1500 ccw->cmd_code = DASD_ECKD_CCW_PSF;
1501 ccw->count = sizeof(struct dasd_psf_prssd_data);
1502 ccw->flags |= CCW_FLAG_CC;
1503 ccw->cda = (__u32)(addr_t) prssdp;
1505 /* Read Subsystem Data - feature codes */
1506 features = (struct dasd_rssd_features *) (prssdp + 1);
1507 memset(features, 0, sizeof(struct dasd_rssd_features));
1510 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
1511 ccw->count = sizeof(struct dasd_rssd_features);
1512 ccw->cda = (__u32)(addr_t) features;
1514 cqr->buildclk = get_tod_clock();
1515 cqr->status = DASD_CQR_FILLED;
1516 rc = dasd_sleep_on(cqr);
1518 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
1519 features = (struct dasd_rssd_features *) (prssdp + 1);
1520 memcpy(&private->features, features,
1521 sizeof(struct dasd_rssd_features));
1523 dev_warn(&device->cdev->dev, "Reading device feature codes"
1524 " failed with rc=%d\n", rc);
1525 dasd_sfree_request(cqr, cqr->memdev);
1531 * Build CP for Perform Subsystem Function - SSC.
1533 static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device,
1536 struct dasd_ccw_req *cqr;
1537 struct dasd_psf_ssc_data *psf_ssc_data;
1540 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ ,
1541 sizeof(struct dasd_psf_ssc_data),
1545 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1546 "Could not allocate PSF-SSC request");
1549 psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data;
1550 psf_ssc_data->order = PSF_ORDER_SSC;
1551 psf_ssc_data->suborder = 0xc0;
1553 psf_ssc_data->suborder |= 0x08;
1554 psf_ssc_data->reserved[0] = 0x88;
1557 ccw->cmd_code = DASD_ECKD_CCW_PSF;
1558 ccw->cda = (__u32)(addr_t)psf_ssc_data;
1561 cqr->startdev = device;
1562 cqr->memdev = device;
1565 cqr->expires = 10*HZ;
1566 cqr->buildclk = get_tod_clock();
1567 cqr->status = DASD_CQR_FILLED;
1572 * Perform Subsystem Function.
1573 * It is necessary to trigger CIO for channel revalidation since this
1574 * call might change behaviour of DASD devices.
1577 dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav,
1578 unsigned long flags)
1580 struct dasd_ccw_req *cqr;
1583 cqr = dasd_eckd_build_psf_ssc(device, enable_pav);
1585 return PTR_ERR(cqr);
1588 * set flags e.g. turn on failfast, to prevent blocking
1589 * the calling function should handle failed requests
1591 cqr->flags |= flags;
1593 rc = dasd_sleep_on(cqr);
1595 /* trigger CIO to reprobe devices */
1596 css_schedule_reprobe();
1597 else if (cqr->intrc == -EAGAIN)
1600 dasd_sfree_request(cqr, cqr->memdev);
1605 * Valide storage server of current device.
1607 static int dasd_eckd_validate_server(struct dasd_device *device,
1608 unsigned long flags)
1611 struct dasd_eckd_private *private;
1614 private = (struct dasd_eckd_private *) device->private;
1615 if (private->uid.type == UA_BASE_PAV_ALIAS ||
1616 private->uid.type == UA_HYPER_PAV_ALIAS)
1618 if (dasd_nopav || MACHINE_IS_VM)
1622 rc = dasd_eckd_psf_ssc(device, enable_pav, flags);
1624 /* may be requested feature is not available on server,
1625 * therefore just report error and go ahead */
1626 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x "
1627 "returned rc=%d", private->uid.ssid, rc);
1632 * worker to do a validate server in case of a lost pathgroup
1634 static void dasd_eckd_do_validate_server(struct work_struct *work)
1636 struct dasd_device *device = container_of(work, struct dasd_device,
1638 unsigned long flags = 0;
1640 set_bit(DASD_CQR_FLAGS_FAILFAST, &flags);
1641 if (dasd_eckd_validate_server(device, flags)
1643 /* schedule worker again if failed */
1644 schedule_work(&device->kick_validate);
1648 dasd_put_device(device);
1651 static void dasd_eckd_kick_validate_server(struct dasd_device *device)
1653 dasd_get_device(device);
1654 /* exit if device not online or in offline processing */
1655 if (test_bit(DASD_FLAG_OFFLINE, &device->flags) ||
1656 device->state < DASD_STATE_ONLINE) {
1657 dasd_put_device(device);
1660 /* queue call to do_validate_server to the kernel event daemon. */
1661 if (!schedule_work(&device->kick_validate))
1662 dasd_put_device(device);
1665 static u32 get_fcx_max_data(struct dasd_device *device)
1668 int fcx_in_css, fcx_in_gneq, fcx_in_features;
1669 struct dasd_eckd_private *private;
1673 /* is transport mode supported? */
1674 private = (struct dasd_eckd_private *) device->private;
1675 fcx_in_css = css_general_characteristics.fcx;
1676 fcx_in_gneq = private->gneq->reserved2[7] & 0x04;
1677 fcx_in_features = private->features.feature[40] & 0x80;
1678 tpm = fcx_in_css && fcx_in_gneq && fcx_in_features;
1683 mdc = ccw_device_get_mdc(device->cdev, 0);
1685 dev_warn(&device->cdev->dev, "Detecting the maximum supported"
1686 " data size for zHPF requests failed\n");
1689 return mdc * FCX_MAX_DATA_FACTOR;
1693 * Check device characteristics.
1694 * If the device is accessible using ECKD discipline, the device is enabled.
1697 dasd_eckd_check_characteristics(struct dasd_device *device)
1699 struct dasd_eckd_private *private;
1700 struct dasd_block *block;
1701 struct dasd_uid temp_uid;
1704 unsigned long value;
1706 /* setup work queue for validate server*/
1707 INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server);
1709 if (!ccw_device_is_pathgroup(device->cdev)) {
1710 dev_warn(&device->cdev->dev,
1711 "A channel path group could not be established\n");
1714 if (!ccw_device_is_multipath(device->cdev)) {
1715 dev_info(&device->cdev->dev,
1716 "The DASD is not operating in multipath mode\n");
1718 private = (struct dasd_eckd_private *) device->private;
1720 private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA);
1722 dev_warn(&device->cdev->dev,
1723 "Allocating memory for private DASD data "
1727 device->private = (void *) private;
1729 memset(private, 0, sizeof(*private));
1731 /* Invalidate status of initial analysis. */
1732 private->init_cqr_status = -1;
1733 /* Set default cache operations. */
1734 private->attrib.operation = DASD_NORMAL_CACHE;
1735 private->attrib.nr_cyl = 0;
1737 /* Read Configuration Data */
1738 rc = dasd_eckd_read_conf(device);
1742 /* set default timeout */
1743 device->default_expires = DASD_EXPIRES;
1744 /* set default retry count */
1745 device->default_retries = DASD_RETRIES;
1747 if (private->gneq) {
1749 for (i = 0; i < private->gneq->timeout.value; i++)
1751 value = value * private->gneq->timeout.number;
1752 /* do not accept useless values */
1753 if (value != 0 && value <= DASD_EXPIRES_MAX)
1754 device->default_expires = value;
1757 dasd_eckd_get_uid(device, &temp_uid);
1758 if (temp_uid.type == UA_BASE_DEVICE) {
1759 block = dasd_alloc_block();
1760 if (IS_ERR(block)) {
1761 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1762 "could not allocate dasd "
1764 rc = PTR_ERR(block);
1767 device->block = block;
1768 block->base = device;
1771 /* register lcu with alias handling, enable PAV */
1772 rc = dasd_alias_make_device_known_to_lcu(device);
1776 dasd_eckd_validate_server(device, 0);
1778 /* device may report different configuration data after LCU setup */
1779 rc = dasd_eckd_read_conf(device);
1783 /* Read Feature Codes */
1784 dasd_eckd_read_features(device);
1786 /* Read Device Characteristics */
1787 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
1788 &private->rdc_data, 64);
1790 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1791 "Read device characteristic failed, rc=%d", rc);
1795 if ((device->features & DASD_FEATURE_USERAW) &&
1796 !(private->rdc_data.facilities.RT_in_LR)) {
1797 dev_err(&device->cdev->dev, "The storage server does not "
1798 "support raw-track access\n");
1803 /* find the valid cylinder size */
1804 if (private->rdc_data.no_cyl == LV_COMPAT_CYL &&
1805 private->rdc_data.long_no_cyl)
1806 private->real_cyl = private->rdc_data.long_no_cyl;
1808 private->real_cyl = private->rdc_data.no_cyl;
1810 private->fcx_max_data = get_fcx_max_data(device);
1812 readonly = dasd_device_is_ro(device);
1814 set_bit(DASD_FLAG_DEVICE_RO, &device->flags);
1816 dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) "
1817 "with %d cylinders, %d heads, %d sectors%s\n",
1818 private->rdc_data.dev_type,
1819 private->rdc_data.dev_model,
1820 private->rdc_data.cu_type,
1821 private->rdc_data.cu_model.model,
1823 private->rdc_data.trk_per_cyl,
1824 private->rdc_data.sec_per_trk,
1825 readonly ? ", read-only device" : "");
1829 dasd_alias_disconnect_device_from_lcu(device);
1831 dasd_free_block(device->block);
1832 device->block = NULL;
1834 kfree(private->conf_data);
1835 kfree(device->private);
1836 device->private = NULL;
1840 static void dasd_eckd_uncheck_device(struct dasd_device *device)
1842 struct dasd_eckd_private *private;
1845 private = (struct dasd_eckd_private *) device->private;
1846 dasd_alias_disconnect_device_from_lcu(device);
1847 private->ned = NULL;
1848 private->sneq = NULL;
1849 private->vdsneq = NULL;
1850 private->gneq = NULL;
1851 private->conf_len = 0;
1852 for (i = 0; i < 8; i++) {
1853 kfree(private->path_conf_data[i]);
1854 if ((__u8 *)private->path_conf_data[i] ==
1855 private->conf_data) {
1856 private->conf_data = NULL;
1857 private->conf_len = 0;
1859 private->path_conf_data[i] = NULL;
1861 kfree(private->conf_data);
1862 private->conf_data = NULL;
1865 static struct dasd_ccw_req *
1866 dasd_eckd_analysis_ccw(struct dasd_device *device)
1868 struct dasd_eckd_private *private;
1869 struct eckd_count *count_data;
1870 struct LO_eckd_data *LO_data;
1871 struct dasd_ccw_req *cqr;
1873 int cplength, datasize;
1876 private = (struct dasd_eckd_private *) device->private;
1879 datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data);
1880 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device);
1884 /* Define extent for the first 3 tracks. */
1885 define_extent(ccw++, cqr->data, 0, 2,
1886 DASD_ECKD_CCW_READ_COUNT, device);
1887 LO_data = cqr->data + sizeof(struct DE_eckd_data);
1888 /* Locate record for the first 4 records on track 0. */
1889 ccw[-1].flags |= CCW_FLAG_CC;
1890 locate_record(ccw++, LO_data++, 0, 0, 4,
1891 DASD_ECKD_CCW_READ_COUNT, device, 0);
1893 count_data = private->count_area;
1894 for (i = 0; i < 4; i++) {
1895 ccw[-1].flags |= CCW_FLAG_CC;
1896 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
1899 ccw->cda = (__u32)(addr_t) count_data;
1904 /* Locate record for the first record on track 2. */
1905 ccw[-1].flags |= CCW_FLAG_CC;
1906 locate_record(ccw++, LO_data++, 2, 0, 1,
1907 DASD_ECKD_CCW_READ_COUNT, device, 0);
1908 /* Read count ccw. */
1909 ccw[-1].flags |= CCW_FLAG_CC;
1910 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
1913 ccw->cda = (__u32)(addr_t) count_data;
1916 cqr->startdev = device;
1917 cqr->memdev = device;
1919 cqr->buildclk = get_tod_clock();
1920 cqr->status = DASD_CQR_FILLED;
1924 /* differentiate between 'no record found' and any other error */
1925 static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr)
1928 if (init_cqr->status == DASD_CQR_DONE)
1930 else if (init_cqr->status == DASD_CQR_NEED_ERP ||
1931 init_cqr->status == DASD_CQR_FAILED) {
1932 sense = dasd_get_sense(&init_cqr->irb);
1933 if (sense && (sense[1] & SNS1_NO_REC_FOUND))
1934 return INIT_CQR_UNFORMATTED;
1936 return INIT_CQR_ERROR;
1938 return INIT_CQR_ERROR;
1942 * This is the callback function for the init_analysis cqr. It saves
1943 * the status of the initial analysis ccw before it frees it and kicks
1944 * the device to continue the startup sequence. This will call
1945 * dasd_eckd_do_analysis again (if the devices has not been marked
1946 * for deletion in the meantime).
1948 static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr,
1951 struct dasd_eckd_private *private;
1952 struct dasd_device *device;
1954 device = init_cqr->startdev;
1955 private = (struct dasd_eckd_private *) device->private;
1956 private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr);
1957 dasd_sfree_request(init_cqr, device);
1958 dasd_kick_device(device);
1961 static int dasd_eckd_start_analysis(struct dasd_block *block)
1963 struct dasd_ccw_req *init_cqr;
1965 init_cqr = dasd_eckd_analysis_ccw(block->base);
1966 if (IS_ERR(init_cqr))
1967 return PTR_ERR(init_cqr);
1968 init_cqr->callback = dasd_eckd_analysis_callback;
1969 init_cqr->callback_data = NULL;
1970 init_cqr->expires = 5*HZ;
1971 /* first try without ERP, so we can later handle unformatted
1972 * devices as special case
1974 clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags);
1975 init_cqr->retries = 0;
1976 dasd_add_request_head(init_cqr);
1980 static int dasd_eckd_end_analysis(struct dasd_block *block)
1982 struct dasd_device *device;
1983 struct dasd_eckd_private *private;
1984 struct eckd_count *count_area;
1985 unsigned int sb, blk_per_trk;
1987 struct dasd_ccw_req *init_cqr;
1989 device = block->base;
1990 private = (struct dasd_eckd_private *) device->private;
1991 status = private->init_cqr_status;
1992 private->init_cqr_status = -1;
1993 if (status == INIT_CQR_ERROR) {
1994 /* try again, this time with full ERP */
1995 init_cqr = dasd_eckd_analysis_ccw(device);
1996 dasd_sleep_on(init_cqr);
1997 status = dasd_eckd_analysis_evaluation(init_cqr);
1998 dasd_sfree_request(init_cqr, device);
2001 if (device->features & DASD_FEATURE_USERAW) {
2002 block->bp_block = DASD_RAW_BLOCKSIZE;
2003 blk_per_trk = DASD_RAW_BLOCK_PER_TRACK;
2004 block->s2b_shift = 3;
2008 if (status == INIT_CQR_UNFORMATTED) {
2009 dev_warn(&device->cdev->dev, "The DASD is not formatted\n");
2010 return -EMEDIUMTYPE;
2011 } else if (status == INIT_CQR_ERROR) {
2012 dev_err(&device->cdev->dev,
2013 "Detecting the DASD disk layout failed because "
2014 "of an I/O error\n");
2018 private->uses_cdl = 1;
2019 /* Check Track 0 for Compatible Disk Layout */
2021 for (i = 0; i < 3; i++) {
2022 if (private->count_area[i].kl != 4 ||
2023 private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 ||
2024 private->count_area[i].cyl != 0 ||
2025 private->count_area[i].head != count_area_head[i] ||
2026 private->count_area[i].record != count_area_rec[i]) {
2027 private->uses_cdl = 0;
2032 count_area = &private->count_area[4];
2034 if (private->uses_cdl == 0) {
2035 for (i = 0; i < 5; i++) {
2036 if ((private->count_area[i].kl != 0) ||
2037 (private->count_area[i].dl !=
2038 private->count_area[0].dl) ||
2039 private->count_area[i].cyl != 0 ||
2040 private->count_area[i].head != count_area_head[i] ||
2041 private->count_area[i].record != count_area_rec[i])
2045 count_area = &private->count_area[0];
2047 if (private->count_area[3].record == 1)
2048 dev_warn(&device->cdev->dev,
2049 "Track 0 has no records following the VTOC\n");
2052 if (count_area != NULL && count_area->kl == 0) {
2053 /* we found notthing violating our disk layout */
2054 if (dasd_check_blocksize(count_area->dl) == 0)
2055 block->bp_block = count_area->dl;
2057 if (block->bp_block == 0) {
2058 dev_warn(&device->cdev->dev,
2059 "The disk layout of the DASD is not supported\n");
2060 return -EMEDIUMTYPE;
2062 block->s2b_shift = 0; /* bits to shift 512 to get a block */
2063 for (sb = 512; sb < block->bp_block; sb = sb << 1)
2066 blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block);
2069 block->blocks = ((unsigned long) private->real_cyl *
2070 private->rdc_data.trk_per_cyl *
2073 dev_info(&device->cdev->dev,
2074 "DASD with %u KB/block, %lu KB total size, %u KB/track, "
2075 "%s\n", (block->bp_block >> 10),
2076 (((unsigned long) private->real_cyl *
2077 private->rdc_data.trk_per_cyl *
2078 blk_per_trk * (block->bp_block >> 9)) >> 1),
2079 ((blk_per_trk * block->bp_block) >> 10),
2081 "compatible disk layout" : "linux disk layout");
2086 static int dasd_eckd_do_analysis(struct dasd_block *block)
2088 struct dasd_eckd_private *private;
2090 private = (struct dasd_eckd_private *) block->base->private;
2091 if (private->init_cqr_status < 0)
2092 return dasd_eckd_start_analysis(block);
2094 return dasd_eckd_end_analysis(block);
2097 static int dasd_eckd_basic_to_ready(struct dasd_device *device)
2099 return dasd_alias_add_device(device);
2102 static int dasd_eckd_online_to_ready(struct dasd_device *device)
2104 if (cancel_work_sync(&device->reload_device))
2105 dasd_put_device(device);
2106 if (cancel_work_sync(&device->kick_validate))
2107 dasd_put_device(device);
2112 static int dasd_eckd_basic_to_known(struct dasd_device *device)
2114 return dasd_alias_remove_device(device);
2118 dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo)
2120 struct dasd_eckd_private *private;
2122 private = (struct dasd_eckd_private *) block->base->private;
2123 if (dasd_check_blocksize(block->bp_block) == 0) {
2124 geo->sectors = recs_per_track(&private->rdc_data,
2125 0, block->bp_block);
2127 geo->cylinders = private->rdc_data.no_cyl;
2128 geo->heads = private->rdc_data.trk_per_cyl;
2132 static struct dasd_ccw_req *
2133 dasd_eckd_build_format(struct dasd_device *base,
2134 struct format_data_t *fdata,
2137 struct dasd_eckd_private *base_priv;
2138 struct dasd_eckd_private *start_priv;
2139 struct dasd_device *startdev = NULL;
2140 struct dasd_ccw_req *fcp;
2141 struct eckd_count *ect;
2142 struct ch_t address;
2146 int cplength, datasize;
2154 startdev = dasd_alias_get_start_dev(base);
2159 start_priv = (struct dasd_eckd_private *) startdev->private;
2160 base_priv = (struct dasd_eckd_private *) base->private;
2162 rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize);
2164 nr_tracks = fdata->stop_unit - fdata->start_unit + 1;
2167 * fdata->intensity is a bit string that tells us what to do:
2168 * Bit 0: write record zero
2169 * Bit 1: write home address, currently not supported
2170 * Bit 2: invalidate tracks
2171 * Bit 3: use OS/390 compatible disk layout (cdl)
2172 * Bit 4: do not allow storage subsystem to modify record zero
2173 * Only some bit combinations do make sense.
2175 if (fdata->intensity & 0x10) {
2177 intensity = fdata->intensity & ~0x10;
2180 intensity = fdata->intensity;
2183 use_prefix = base_priv->features.feature[8] & 0x01;
2185 switch (intensity) {
2186 case 0x00: /* Normal format */
2187 case 0x08: /* Normal format, use cdl. */
2188 cplength = 2 + (rpt*nr_tracks);
2190 datasize = sizeof(struct PFX_eckd_data) +
2191 sizeof(struct LO_eckd_data) +
2192 rpt * nr_tracks * sizeof(struct eckd_count);
2194 datasize = sizeof(struct DE_eckd_data) +
2195 sizeof(struct LO_eckd_data) +
2196 rpt * nr_tracks * sizeof(struct eckd_count);
2198 case 0x01: /* Write record zero and format track. */
2199 case 0x09: /* Write record zero and format track, use cdl. */
2200 cplength = 2 + rpt * nr_tracks;
2202 datasize = sizeof(struct PFX_eckd_data) +
2203 sizeof(struct LO_eckd_data) +
2204 sizeof(struct eckd_count) +
2205 rpt * nr_tracks * sizeof(struct eckd_count);
2207 datasize = sizeof(struct DE_eckd_data) +
2208 sizeof(struct LO_eckd_data) +
2209 sizeof(struct eckd_count) +
2210 rpt * nr_tracks * sizeof(struct eckd_count);
2212 case 0x04: /* Invalidate track. */
2213 case 0x0c: /* Invalidate track, use cdl. */
2216 datasize = sizeof(struct PFX_eckd_data) +
2217 sizeof(struct LO_eckd_data) +
2218 sizeof(struct eckd_count);
2220 datasize = sizeof(struct DE_eckd_data) +
2221 sizeof(struct LO_eckd_data) +
2222 sizeof(struct eckd_count);
2225 dev_warn(&startdev->cdev->dev,
2226 "An I/O control call used incorrect flags 0x%x\n",
2228 return ERR_PTR(-EINVAL);
2230 /* Allocate the format ccw request. */
2231 fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength,
2232 datasize, startdev);
2236 start_priv->count++;
2240 switch (intensity & ~0x08) {
2241 case 0x00: /* Normal format. */
2243 prefix(ccw++, (struct PFX_eckd_data *) data,
2244 fdata->start_unit, fdata->stop_unit,
2245 DASD_ECKD_CCW_WRITE_CKD, base, startdev);
2246 /* grant subsystem permission to format R0 */
2248 ((struct PFX_eckd_data *)data)
2249 ->define_extent.ga_extended |= 0x04;
2250 data += sizeof(struct PFX_eckd_data);
2252 define_extent(ccw++, (struct DE_eckd_data *) data,
2253 fdata->start_unit, fdata->stop_unit,
2254 DASD_ECKD_CCW_WRITE_CKD, startdev);
2255 /* grant subsystem permission to format R0 */
2257 ((struct DE_eckd_data *) data)
2258 ->ga_extended |= 0x04;
2259 data += sizeof(struct DE_eckd_data);
2261 ccw[-1].flags |= CCW_FLAG_CC;
2262 locate_record(ccw++, (struct LO_eckd_data *) data,
2263 fdata->start_unit, 0, rpt*nr_tracks,
2264 DASD_ECKD_CCW_WRITE_CKD, base,
2266 data += sizeof(struct LO_eckd_data);
2268 case 0x01: /* Write record zero + format track. */
2270 prefix(ccw++, (struct PFX_eckd_data *) data,
2271 fdata->start_unit, fdata->stop_unit,
2272 DASD_ECKD_CCW_WRITE_RECORD_ZERO,
2274 data += sizeof(struct PFX_eckd_data);
2276 define_extent(ccw++, (struct DE_eckd_data *) data,
2277 fdata->start_unit, fdata->stop_unit,
2278 DASD_ECKD_CCW_WRITE_RECORD_ZERO, startdev);
2279 data += sizeof(struct DE_eckd_data);
2281 ccw[-1].flags |= CCW_FLAG_CC;
2282 locate_record(ccw++, (struct LO_eckd_data *) data,
2283 fdata->start_unit, 0, rpt * nr_tracks + 1,
2284 DASD_ECKD_CCW_WRITE_RECORD_ZERO, base,
2285 base->block->bp_block);
2286 data += sizeof(struct LO_eckd_data);
2288 case 0x04: /* Invalidate track. */
2290 prefix(ccw++, (struct PFX_eckd_data *) data,
2291 fdata->start_unit, fdata->stop_unit,
2292 DASD_ECKD_CCW_WRITE_CKD, base, startdev);
2293 data += sizeof(struct PFX_eckd_data);
2295 define_extent(ccw++, (struct DE_eckd_data *) data,
2296 fdata->start_unit, fdata->stop_unit,
2297 DASD_ECKD_CCW_WRITE_CKD, startdev);
2298 data += sizeof(struct DE_eckd_data);
2300 ccw[-1].flags |= CCW_FLAG_CC;
2301 locate_record(ccw++, (struct LO_eckd_data *) data,
2302 fdata->start_unit, 0, 1,
2303 DASD_ECKD_CCW_WRITE_CKD, base, 8);
2304 data += sizeof(struct LO_eckd_data);
2308 for (j = 0; j < nr_tracks; j++) {
2309 /* calculate cylinder and head for the current track */
2311 (fdata->start_unit + j) /
2312 base_priv->rdc_data.trk_per_cyl,
2313 (fdata->start_unit + j) %
2314 base_priv->rdc_data.trk_per_cyl);
2315 if (intensity & 0x01) { /* write record zero */
2316 ect = (struct eckd_count *) data;
2317 data += sizeof(struct eckd_count);
2318 ect->cyl = address.cyl;
2319 ect->head = address.head;
2323 ccw[-1].flags |= CCW_FLAG_CC;
2324 ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO;
2325 ccw->flags = CCW_FLAG_SLI;
2327 ccw->cda = (__u32)(addr_t) ect;
2330 if ((intensity & ~0x08) & 0x04) { /* erase track */
2331 ect = (struct eckd_count *) data;
2332 data += sizeof(struct eckd_count);
2333 ect->cyl = address.cyl;
2334 ect->head = address.head;
2338 ccw[-1].flags |= CCW_FLAG_CC;
2339 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD;
2340 ccw->flags = CCW_FLAG_SLI;
2342 ccw->cda = (__u32)(addr_t) ect;
2343 } else { /* write remaining records */
2344 for (i = 0; i < rpt; i++) {
2345 ect = (struct eckd_count *) data;
2346 data += sizeof(struct eckd_count);
2347 ect->cyl = address.cyl;
2348 ect->head = address.head;
2349 ect->record = i + 1;
2351 ect->dl = fdata->blksize;
2353 * Check for special tracks 0-1
2354 * when formatting CDL
2356 if ((intensity & 0x08) &&
2357 fdata->start_unit == 0) {
2360 ect->dl = sizes_trk0[i] - 4;
2363 if ((intensity & 0x08) &&
2364 fdata->start_unit == 1) {
2366 ect->dl = LABEL_SIZE - 44;
2368 ccw[-1].flags |= CCW_FLAG_CC;
2369 if (i != 0 || j == 0)
2371 DASD_ECKD_CCW_WRITE_CKD;
2374 DASD_ECKD_CCW_WRITE_CKD_MT;
2375 ccw->flags = CCW_FLAG_SLI;
2377 ccw->cda = (__u32)(addr_t) ect;
2383 fcp->startdev = startdev;
2384 fcp->memdev = startdev;
2385 fcp->basedev = base;
2387 fcp->expires = startdev->default_expires * HZ;
2388 fcp->buildclk = get_tod_clock();
2389 fcp->status = DASD_CQR_FILLED;
2395 dasd_eckd_format_device(struct dasd_device *base,
2396 struct format_data_t *fdata,
2399 struct dasd_ccw_req *cqr, *n;
2400 struct dasd_block *block;
2401 struct dasd_eckd_private *private;
2402 struct list_head format_queue;
2403 struct dasd_device *device;
2404 int old_stop, format_step;
2405 int step, rc = 0, sleep_rc;
2407 block = base->block;
2408 private = (struct dasd_eckd_private *) base->private;
2410 /* Sanity checks. */
2411 if (fdata->start_unit >=
2412 (private->real_cyl * private->rdc_data.trk_per_cyl)) {
2413 dev_warn(&base->cdev->dev,
2414 "Start track number %u used in formatting is too big\n",
2418 if (fdata->stop_unit >=
2419 (private->real_cyl * private->rdc_data.trk_per_cyl)) {
2420 dev_warn(&base->cdev->dev,
2421 "Stop track number %u used in formatting is too big\n",
2425 if (fdata->start_unit > fdata->stop_unit) {
2426 dev_warn(&base->cdev->dev,
2427 "Start track %u used in formatting exceeds end track\n",
2431 if (dasd_check_blocksize(fdata->blksize) != 0) {
2432 dev_warn(&base->cdev->dev,
2433 "The DASD cannot be formatted with block size %u\n",
2438 INIT_LIST_HEAD(&format_queue);
2440 old_stop = fdata->stop_unit;
2441 while (fdata->start_unit <= 1) {
2442 fdata->stop_unit = fdata->start_unit;
2443 cqr = dasd_eckd_build_format(base, fdata, enable_pav);
2444 list_add(&cqr->blocklist, &format_queue);
2446 fdata->stop_unit = old_stop;
2447 fdata->start_unit++;
2449 if (fdata->start_unit > fdata->stop_unit)
2454 format_step = 255 / recs_per_track(&private->rdc_data, 0,
2456 while (fdata->start_unit <= old_stop) {
2457 step = fdata->stop_unit - fdata->start_unit + 1;
2458 if (step > format_step)
2459 fdata->stop_unit = fdata->start_unit + format_step - 1;
2461 cqr = dasd_eckd_build_format(base, fdata, enable_pav);
2463 if (PTR_ERR(cqr) == -ENOMEM) {
2465 * not enough memory available
2466 * go to out and start requests
2467 * retry after first requests were finished
2469 fdata->stop_unit = old_stop;
2472 return PTR_ERR(cqr);
2474 list_add(&cqr->blocklist, &format_queue);
2476 fdata->start_unit = fdata->stop_unit + 1;
2477 fdata->stop_unit = old_stop;
2481 sleep_rc = dasd_sleep_on_queue(&format_queue);
2483 list_for_each_entry_safe(cqr, n, &format_queue, blocklist) {
2484 device = cqr->startdev;
2485 private = (struct dasd_eckd_private *) device->private;
2486 if (cqr->status == DASD_CQR_FAILED)
2488 list_del_init(&cqr->blocklist);
2489 dasd_sfree_request(cqr, device);
2497 * in case of ENOMEM we need to retry after
2498 * first requests are finished
2500 if (fdata->start_unit <= fdata->stop_unit)
2506 static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr)
2508 if (cqr->retries < 0) {
2509 cqr->status = DASD_CQR_FAILED;
2512 cqr->status = DASD_CQR_FILLED;
2513 if (cqr->block && (cqr->startdev != cqr->block->base)) {
2514 dasd_eckd_reset_ccw_to_base_io(cqr);
2515 cqr->startdev = cqr->block->base;
2516 cqr->lpm = cqr->block->base->path_data.opm;
2520 static dasd_erp_fn_t
2521 dasd_eckd_erp_action(struct dasd_ccw_req * cqr)
2523 struct dasd_device *device = (struct dasd_device *) cqr->startdev;
2524 struct ccw_device *cdev = device->cdev;
2526 switch (cdev->id.cu_type) {
2531 return dasd_3990_erp_action;
2535 return dasd_default_erp_action;
2539 static dasd_erp_fn_t
2540 dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr)
2542 return dasd_default_erp_postaction;
2545 static void dasd_eckd_check_for_device_change(struct dasd_device *device,
2546 struct dasd_ccw_req *cqr,
2551 struct dasd_eckd_private *private;
2553 private = (struct dasd_eckd_private *) device->private;
2554 /* first of all check for state change pending interrupt */
2555 mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP;
2556 if ((scsw_dstat(&irb->scsw) & mask) == mask) {
2558 * for alias only, not in offline processing
2559 * and only if not suspended
2561 if (!device->block && private->lcu &&
2562 device->state == DASD_STATE_ONLINE &&
2563 !test_bit(DASD_FLAG_OFFLINE, &device->flags) &&
2564 !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) {
2566 * the state change could be caused by an alias
2567 * reassignment remove device from alias handling
2568 * to prevent new requests from being scheduled on
2569 * the wrong alias device
2571 dasd_alias_remove_device(device);
2573 /* schedule worker to reload device */
2574 dasd_reload_device(device);
2576 dasd_generic_handle_state_change(device);
2580 sense = dasd_get_sense(irb);
2584 /* summary unit check */
2585 if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) &&
2586 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) {
2587 dasd_alias_handle_summary_unit_check(device, irb);
2591 /* service information message SIM */
2592 if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) &&
2593 ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) {
2594 dasd_3990_erp_handle_sim(device, sense);
2598 /* loss of device reservation is handled via base devices only
2599 * as alias devices may be used with several bases
2601 if (device->block && (sense[27] & DASD_SENSE_BIT_0) &&
2602 (sense[7] == 0x3F) &&
2603 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) &&
2604 test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) {
2605 if (device->features & DASD_FEATURE_FAILONSLCK)
2606 set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags);
2607 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags);
2608 dev_err(&device->cdev->dev,
2609 "The device reservation was lost\n");
2613 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single(
2614 struct dasd_device *startdev,
2615 struct dasd_block *block,
2616 struct request *req,
2621 unsigned int first_offs,
2622 unsigned int last_offs,
2623 unsigned int blk_per_trk,
2624 unsigned int blksize)
2626 struct dasd_eckd_private *private;
2627 unsigned long *idaws;
2628 struct LO_eckd_data *LO_data;
2629 struct dasd_ccw_req *cqr;
2631 struct req_iterator iter;
2635 int count, cidaw, cplength, datasize;
2637 unsigned char cmd, rcmd;
2639 struct dasd_device *basedev;
2641 basedev = block->base;
2642 private = (struct dasd_eckd_private *) basedev->private;
2643 if (rq_data_dir(req) == READ)
2644 cmd = DASD_ECKD_CCW_READ_MT;
2645 else if (rq_data_dir(req) == WRITE)
2646 cmd = DASD_ECKD_CCW_WRITE_MT;
2648 return ERR_PTR(-EINVAL);
2650 /* Check struct bio and count the number of blocks for the request. */
2653 rq_for_each_segment(bv, req, iter) {
2654 if (bv.bv_len & (blksize - 1))
2655 /* Eckd can only do full blocks. */
2656 return ERR_PTR(-EINVAL);
2657 count += bv.bv_len >> (block->s2b_shift + 9);
2658 if (idal_is_needed (page_address(bv.bv_page), bv.bv_len))
2659 cidaw += bv.bv_len >> (block->s2b_shift + 9);
2662 if (count != last_rec - first_rec + 1)
2663 return ERR_PTR(-EINVAL);
2665 /* use the prefix command if available */
2666 use_prefix = private->features.feature[8] & 0x01;
2668 /* 1x prefix + number of blocks */
2669 cplength = 2 + count;
2670 /* 1x prefix + cidaws*sizeof(long) */
2671 datasize = sizeof(struct PFX_eckd_data) +
2672 sizeof(struct LO_eckd_data) +
2673 cidaw * sizeof(unsigned long);
2675 /* 1x define extent + 1x locate record + number of blocks */
2676 cplength = 2 + count;
2677 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */
2678 datasize = sizeof(struct DE_eckd_data) +
2679 sizeof(struct LO_eckd_data) +
2680 cidaw * sizeof(unsigned long);
2682 /* Find out the number of additional locate record ccws for cdl. */
2683 if (private->uses_cdl && first_rec < 2*blk_per_trk) {
2684 if (last_rec >= 2*blk_per_trk)
2685 count = 2*blk_per_trk - first_rec;
2687 datasize += count*sizeof(struct LO_eckd_data);
2689 /* Allocate the ccw request. */
2690 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
2695 /* First ccw is define extent or prefix. */
2697 if (prefix(ccw++, cqr->data, first_trk,
2698 last_trk, cmd, basedev, startdev) == -EAGAIN) {
2699 /* Clock not in sync and XRC is enabled.
2702 dasd_sfree_request(cqr, startdev);
2703 return ERR_PTR(-EAGAIN);
2705 idaws = (unsigned long *) (cqr->data +
2706 sizeof(struct PFX_eckd_data));
2708 if (define_extent(ccw++, cqr->data, first_trk,
2709 last_trk, cmd, basedev) == -EAGAIN) {
2710 /* Clock not in sync and XRC is enabled.
2713 dasd_sfree_request(cqr, startdev);
2714 return ERR_PTR(-EAGAIN);
2716 idaws = (unsigned long *) (cqr->data +
2717 sizeof(struct DE_eckd_data));
2719 /* Build locate_record+read/write/ccws. */
2720 LO_data = (struct LO_eckd_data *) (idaws + cidaw);
2722 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) {
2723 /* Only standard blocks so there is just one locate record. */
2724 ccw[-1].flags |= CCW_FLAG_CC;
2725 locate_record(ccw++, LO_data++, first_trk, first_offs + 1,
2726 last_rec - recid + 1, cmd, basedev, blksize);
2728 rq_for_each_segment(bv, req, iter) {
2729 dst = page_address(bv.bv_page) + bv.bv_offset;
2730 if (dasd_page_cache) {
2731 char *copy = kmem_cache_alloc(dasd_page_cache,
2732 GFP_DMA | __GFP_NOWARN);
2733 if (copy && rq_data_dir(req) == WRITE)
2734 memcpy(copy + bv.bv_offset, dst, bv.bv_len);
2736 dst = copy + bv.bv_offset;
2738 for (off = 0; off < bv.bv_len; off += blksize) {
2739 sector_t trkid = recid;
2740 unsigned int recoffs = sector_div(trkid, blk_per_trk);
2743 /* Locate record for cdl special block ? */
2744 if (private->uses_cdl && recid < 2*blk_per_trk) {
2745 if (dasd_eckd_cdl_special(blk_per_trk, recid)){
2747 count = dasd_eckd_cdl_reclen(recid);
2748 if (count < blksize &&
2749 rq_data_dir(req) == READ)
2750 memset(dst + count, 0xe5,
2753 ccw[-1].flags |= CCW_FLAG_CC;
2754 locate_record(ccw++, LO_data++,
2756 1, rcmd, basedev, count);
2758 /* Locate record for standard blocks ? */
2759 if (private->uses_cdl && recid == 2*blk_per_trk) {
2760 ccw[-1].flags |= CCW_FLAG_CC;
2761 locate_record(ccw++, LO_data++,
2763 last_rec - recid + 1,
2764 cmd, basedev, count);
2766 /* Read/write ccw. */
2767 ccw[-1].flags |= CCW_FLAG_CC;
2768 ccw->cmd_code = rcmd;
2770 if (idal_is_needed(dst, blksize)) {
2771 ccw->cda = (__u32)(addr_t) idaws;
2772 ccw->flags = CCW_FLAG_IDA;
2773 idaws = idal_create_words(idaws, dst, blksize);
2775 ccw->cda = (__u32)(addr_t) dst;
2783 if (blk_noretry_request(req) ||
2784 block->base->features & DASD_FEATURE_FAILFAST)
2785 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
2786 cqr->startdev = startdev;
2787 cqr->memdev = startdev;
2789 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
2790 cqr->lpm = startdev->path_data.ppm;
2791 cqr->retries = startdev->default_retries;
2792 cqr->buildclk = get_tod_clock();
2793 cqr->status = DASD_CQR_FILLED;
2797 static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track(
2798 struct dasd_device *startdev,
2799 struct dasd_block *block,
2800 struct request *req,
2805 unsigned int first_offs,
2806 unsigned int last_offs,
2807 unsigned int blk_per_trk,
2808 unsigned int blksize)
2810 unsigned long *idaws;
2811 struct dasd_ccw_req *cqr;
2813 struct req_iterator iter;
2815 char *dst, *idaw_dst;
2816 unsigned int cidaw, cplength, datasize;
2820 struct dasd_device *basedev;
2821 unsigned int trkcount, count, count_to_trk_end;
2822 unsigned int idaw_len, seg_len, part_len, len_to_track_end;
2823 unsigned char new_track, end_idaw;
2825 unsigned int recoffs;
2827 basedev = block->base;
2828 if (rq_data_dir(req) == READ)
2829 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
2830 else if (rq_data_dir(req) == WRITE)
2831 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
2833 return ERR_PTR(-EINVAL);
2835 /* Track based I/O needs IDAWs for each page, and not just for
2836 * 64 bit addresses. We need additional idals for pages
2837 * that get filled from two tracks, so we use the number
2838 * of records as upper limit.
2840 cidaw = last_rec - first_rec + 1;
2841 trkcount = last_trk - first_trk + 1;
2843 /* 1x prefix + one read/write ccw per track */
2844 cplength = 1 + trkcount;
2846 /* on 31-bit we need space for two 32 bit addresses per page
2847 * on 64-bit one 64 bit address
2849 datasize = sizeof(struct PFX_eckd_data) +
2850 cidaw * sizeof(unsigned long long);
2852 /* Allocate the ccw request. */
2853 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
2858 /* transfer length factor: how many bytes to read from the last track */
2859 if (first_trk == last_trk)
2860 tlf = last_offs - first_offs + 1;
2862 tlf = last_offs + 1;
2865 if (prefix_LRE(ccw++, cqr->data, first_trk,
2866 last_trk, cmd, basedev, startdev,
2867 1 /* format */, first_offs + 1,
2870 /* Clock not in sync and XRC is enabled.
2873 dasd_sfree_request(cqr, startdev);
2874 return ERR_PTR(-EAGAIN);
2878 * The translation of request into ccw programs must meet the
2879 * following conditions:
2880 * - all idaws but the first and the last must address full pages
2881 * (or 2K blocks on 31-bit)
2882 * - the scope of a ccw and it's idal ends with the track boundaries
2884 idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data));
2888 len_to_track_end = 0;
2891 rq_for_each_segment(bv, req, iter) {
2892 dst = page_address(bv.bv_page) + bv.bv_offset;
2893 seg_len = bv.bv_len;
2897 recoffs = sector_div(trkid, blk_per_trk);
2898 count_to_trk_end = blk_per_trk - recoffs;
2899 count = min((last_rec - recid + 1),
2900 (sector_t)count_to_trk_end);
2901 len_to_track_end = count * blksize;
2902 ccw[-1].flags |= CCW_FLAG_CC;
2903 ccw->cmd_code = cmd;
2904 ccw->count = len_to_track_end;
2905 ccw->cda = (__u32)(addr_t)idaws;
2906 ccw->flags = CCW_FLAG_IDA;
2910 /* first idaw for a ccw may start anywhere */
2914 /* If we start a new idaw, we must make sure that it
2915 * starts on an IDA_BLOCK_SIZE boundary.
2916 * If we continue an idaw, we must make sure that the
2917 * current segment begins where the so far accumulated
2921 if (__pa(dst) & (IDA_BLOCK_SIZE-1)) {
2922 dasd_sfree_request(cqr, startdev);
2923 return ERR_PTR(-ERANGE);
2927 if ((idaw_dst + idaw_len) != dst) {
2928 dasd_sfree_request(cqr, startdev);
2929 return ERR_PTR(-ERANGE);
2931 part_len = min(seg_len, len_to_track_end);
2932 seg_len -= part_len;
2934 idaw_len += part_len;
2935 len_to_track_end -= part_len;
2936 /* collected memory area ends on an IDA_BLOCK border,
2938 * idal_create_words will handle cases where idaw_len
2939 * is larger then IDA_BLOCK_SIZE
2941 if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1)))
2943 /* We also need to end the idaw at track end */
2944 if (!len_to_track_end) {
2949 idaws = idal_create_words(idaws, idaw_dst,
2958 if (blk_noretry_request(req) ||
2959 block->base->features & DASD_FEATURE_FAILFAST)
2960 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
2961 cqr->startdev = startdev;
2962 cqr->memdev = startdev;
2964 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
2965 cqr->lpm = startdev->path_data.ppm;
2966 cqr->retries = startdev->default_retries;
2967 cqr->buildclk = get_tod_clock();
2968 cqr->status = DASD_CQR_FILLED;
2972 static int prepare_itcw(struct itcw *itcw,
2973 unsigned int trk, unsigned int totrk, int cmd,
2974 struct dasd_device *basedev,
2975 struct dasd_device *startdev,
2976 unsigned int rec_on_trk, int count,
2977 unsigned int blksize,
2978 unsigned int total_data_size,
2980 unsigned int blk_per_trk)
2982 struct PFX_eckd_data pfxdata;
2983 struct dasd_eckd_private *basepriv, *startpriv;
2984 struct DE_eckd_data *dedata;
2985 struct LRE_eckd_data *lredata;
2989 u16 heads, beghead, endhead;
2997 /* setup prefix data */
2998 basepriv = (struct dasd_eckd_private *) basedev->private;
2999 startpriv = (struct dasd_eckd_private *) startdev->private;
3000 dedata = &pfxdata.define_extent;
3001 lredata = &pfxdata.locate_record;
3003 memset(&pfxdata, 0, sizeof(pfxdata));
3004 pfxdata.format = 1; /* PFX with LRE */
3005 pfxdata.base_address = basepriv->ned->unit_addr;
3006 pfxdata.base_lss = basepriv->ned->ID;
3007 pfxdata.validity.define_extent = 1;
3009 /* private uid is kept up to date, conf_data may be outdated */
3010 if (startpriv->uid.type == UA_BASE_PAV_ALIAS)
3011 pfxdata.validity.verify_base = 1;
3013 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) {
3014 pfxdata.validity.verify_base = 1;
3015 pfxdata.validity.hyper_pav = 1;
3019 case DASD_ECKD_CCW_READ_TRACK_DATA:
3020 dedata->mask.perm = 0x1;
3021 dedata->attributes.operation = basepriv->attrib.operation;
3022 dedata->blk_size = blksize;
3023 dedata->ga_extended |= 0x42;
3024 lredata->operation.orientation = 0x0;
3025 lredata->operation.operation = 0x0C;
3026 lredata->auxiliary.check_bytes = 0x01;
3027 pfx_cmd = DASD_ECKD_CCW_PFX_READ;
3029 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
3030 dedata->mask.perm = 0x02;
3031 dedata->attributes.operation = basepriv->attrib.operation;
3032 dedata->blk_size = blksize;
3033 rc = check_XRC_on_prefix(&pfxdata, basedev);
3034 dedata->ga_extended |= 0x42;
3035 lredata->operation.orientation = 0x0;
3036 lredata->operation.operation = 0x3F;
3037 lredata->extended_operation = 0x23;
3038 lredata->auxiliary.check_bytes = 0x2;
3039 pfx_cmd = DASD_ECKD_CCW_PFX;
3042 DBF_DEV_EVENT(DBF_ERR, basedev,
3043 "prepare itcw, unknown opcode 0x%x", cmd);
3050 dedata->attributes.mode = 0x3; /* ECKD */
3052 heads = basepriv->rdc_data.trk_per_cyl;
3053 begcyl = trk / heads;
3054 beghead = trk % heads;
3055 endcyl = totrk / heads;
3056 endhead = totrk % heads;
3058 /* check for sequential prestage - enhance cylinder range */
3059 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE ||
3060 dedata->attributes.operation == DASD_SEQ_ACCESS) {
3062 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl)
3063 endcyl += basepriv->attrib.nr_cyl;
3065 endcyl = (basepriv->real_cyl - 1);
3068 set_ch_t(&dedata->beg_ext, begcyl, beghead);
3069 set_ch_t(&dedata->end_ext, endcyl, endhead);
3071 dedata->ep_format = 0x20; /* records per track is valid */
3072 dedata->ep_rec_per_track = blk_per_trk;
3075 switch (basepriv->rdc_data.dev_type) {
3077 dn = ceil_quot(blksize + 6, 232);
3078 d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34);
3079 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
3082 d = 7 + ceil_quot(blksize + 12, 32);
3083 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
3088 lredata->auxiliary.length_valid = 1;
3089 lredata->auxiliary.length_scope = 1;
3090 lredata->auxiliary.imbedded_ccw_valid = 1;
3091 lredata->length = tlf;
3092 lredata->imbedded_ccw = cmd;
3093 lredata->count = count;
3094 lredata->sector = sector;
3095 set_ch_t(&lredata->seek_addr, begcyl, beghead);
3096 lredata->search_arg.cyl = lredata->seek_addr.cyl;
3097 lredata->search_arg.head = lredata->seek_addr.head;
3098 lredata->search_arg.record = rec_on_trk;
3100 dcw = itcw_add_dcw(itcw, pfx_cmd, 0,
3101 &pfxdata, sizeof(pfxdata), total_data_size);
3102 return PTR_RET(dcw);
3105 static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track(
3106 struct dasd_device *startdev,
3107 struct dasd_block *block,
3108 struct request *req,
3113 unsigned int first_offs,
3114 unsigned int last_offs,
3115 unsigned int blk_per_trk,
3116 unsigned int blksize)
3118 struct dasd_ccw_req *cqr;
3119 struct req_iterator iter;
3122 unsigned int trkcount, ctidaw;
3124 struct dasd_device *basedev;
3127 struct tidaw *last_tidaw = NULL;
3131 unsigned int seg_len, part_len, len_to_track_end;
3132 unsigned char new_track;
3133 sector_t recid, trkid;
3135 unsigned int count, count_to_trk_end;
3138 basedev = block->base;
3139 if (rq_data_dir(req) == READ) {
3140 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
3141 itcw_op = ITCW_OP_READ;
3142 } else if (rq_data_dir(req) == WRITE) {
3143 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
3144 itcw_op = ITCW_OP_WRITE;
3146 return ERR_PTR(-EINVAL);
3148 /* trackbased I/O needs address all memory via TIDAWs,
3149 * not just for 64 bit addresses. This allows us to map
3150 * each segment directly to one tidaw.
3151 * In the case of write requests, additional tidaws may
3152 * be needed when a segment crosses a track boundary.
3154 trkcount = last_trk - first_trk + 1;
3156 rq_for_each_segment(bv, req, iter) {
3159 if (rq_data_dir(req) == WRITE)
3160 ctidaw += (last_trk - first_trk);
3162 /* Allocate the ccw request. */
3163 itcw_size = itcw_calc_size(0, ctidaw, 0);
3164 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev);
3168 /* transfer length factor: how many bytes to read from the last track */
3169 if (first_trk == last_trk)
3170 tlf = last_offs - first_offs + 1;
3172 tlf = last_offs + 1;
3175 itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0);
3180 cqr->cpaddr = itcw_get_tcw(itcw);
3181 if (prepare_itcw(itcw, first_trk, last_trk,
3182 cmd, basedev, startdev,
3185 (last_rec - first_rec + 1) * blksize,
3186 tlf, blk_per_trk) == -EAGAIN) {
3187 /* Clock not in sync and XRC is enabled.
3193 len_to_track_end = 0;
3195 * A tidaw can address 4k of memory, but must not cross page boundaries
3196 * We can let the block layer handle this by setting
3197 * blk_queue_segment_boundary to page boundaries and
3198 * blk_max_segment_size to page size when setting up the request queue.
3199 * For write requests, a TIDAW must not cross track boundaries, because
3200 * we have to set the CBC flag on the last tidaw for each track.
3202 if (rq_data_dir(req) == WRITE) {
3205 rq_for_each_segment(bv, req, iter) {
3206 dst = page_address(bv.bv_page) + bv.bv_offset;
3207 seg_len = bv.bv_len;
3211 offs = sector_div(trkid, blk_per_trk);
3212 count_to_trk_end = blk_per_trk - offs;
3213 count = min((last_rec - recid + 1),
3214 (sector_t)count_to_trk_end);
3215 len_to_track_end = count * blksize;
3219 part_len = min(seg_len, len_to_track_end);
3220 seg_len -= part_len;
3221 len_to_track_end -= part_len;
3222 /* We need to end the tidaw at track end */
3223 if (!len_to_track_end) {
3225 tidaw_flags = TIDAW_FLAGS_INSERT_CBC;
3228 last_tidaw = itcw_add_tidaw(itcw, tidaw_flags,
3230 if (IS_ERR(last_tidaw)) {
3238 rq_for_each_segment(bv, req, iter) {
3239 dst = page_address(bv.bv_page) + bv.bv_offset;
3240 last_tidaw = itcw_add_tidaw(itcw, 0x00,
3242 if (IS_ERR(last_tidaw)) {
3248 last_tidaw->flags |= TIDAW_FLAGS_LAST;
3249 last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC;
3250 itcw_finalize(itcw);
3252 if (blk_noretry_request(req) ||
3253 block->base->features & DASD_FEATURE_FAILFAST)
3254 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
3256 cqr->startdev = startdev;
3257 cqr->memdev = startdev;
3259 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
3260 cqr->lpm = startdev->path_data.ppm;
3261 cqr->retries = startdev->default_retries;
3262 cqr->buildclk = get_tod_clock();
3263 cqr->status = DASD_CQR_FILLED;
3266 dasd_sfree_request(cqr, startdev);
3267 return ERR_PTR(ret);
3270 static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev,
3271 struct dasd_block *block,
3272 struct request *req)
3277 struct dasd_eckd_private *private;
3278 struct dasd_device *basedev;
3279 sector_t first_rec, last_rec;
3280 sector_t first_trk, last_trk;
3281 unsigned int first_offs, last_offs;
3282 unsigned int blk_per_trk, blksize;
3284 unsigned int data_size;
3285 struct dasd_ccw_req *cqr;
3287 basedev = block->base;
3288 private = (struct dasd_eckd_private *) basedev->private;
3290 /* Calculate number of blocks/records per track. */
3291 blksize = block->bp_block;
3292 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
3293 if (blk_per_trk == 0)
3294 return ERR_PTR(-EINVAL);
3295 /* Calculate record id of first and last block. */
3296 first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift;
3297 first_offs = sector_div(first_trk, blk_per_trk);
3298 last_rec = last_trk =
3299 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift;
3300 last_offs = sector_div(last_trk, blk_per_trk);
3301 cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk);
3303 fcx_multitrack = private->features.feature[40] & 0x20;
3304 data_size = blk_rq_bytes(req);
3305 if (data_size % blksize)
3306 return ERR_PTR(-EINVAL);
3307 /* tpm write request add CBC data on each track boundary */
3308 if (rq_data_dir(req) == WRITE)
3309 data_size += (last_trk - first_trk) * 4;
3311 /* is read track data and write track data in command mode supported? */
3312 cmdrtd = private->features.feature[9] & 0x20;
3313 cmdwtd = private->features.feature[12] & 0x40;
3314 use_prefix = private->features.feature[8] & 0x01;
3317 if (cdlspecial || dasd_page_cache) {
3318 /* do nothing, just fall through to the cmd mode single case */
3319 } else if ((data_size <= private->fcx_max_data)
3320 && (fcx_multitrack || (first_trk == last_trk))) {
3321 cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req,
3322 first_rec, last_rec,
3323 first_trk, last_trk,
3324 first_offs, last_offs,
3325 blk_per_trk, blksize);
3326 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) &&
3327 (PTR_ERR(cqr) != -ENOMEM))
3329 } else if (use_prefix &&
3330 (((rq_data_dir(req) == READ) && cmdrtd) ||
3331 ((rq_data_dir(req) == WRITE) && cmdwtd))) {
3332 cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req,
3333 first_rec, last_rec,
3334 first_trk, last_trk,
3335 first_offs, last_offs,
3336 blk_per_trk, blksize);
3337 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) &&
3338 (PTR_ERR(cqr) != -ENOMEM))
3342 cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req,
3343 first_rec, last_rec,
3344 first_trk, last_trk,
3345 first_offs, last_offs,
3346 blk_per_trk, blksize);
3350 static struct dasd_ccw_req *dasd_raw_build_cp(struct dasd_device *startdev,
3351 struct dasd_block *block,
3352 struct request *req)
3354 unsigned long *idaws;
3355 struct dasd_device *basedev;
3356 struct dasd_ccw_req *cqr;
3358 struct req_iterator iter;
3362 unsigned int trkcount;
3363 unsigned int seg_len, len_to_track_end;
3364 unsigned int first_offs;
3365 unsigned int cidaw, cplength, datasize;
3366 sector_t first_trk, last_trk, sectors;
3367 sector_t start_padding_sectors, end_sector_offset, end_padding_sectors;
3368 unsigned int pfx_datasize;
3371 * raw track access needs to be mutiple of 64k and on 64k boundary
3372 * For read requests we can fix an incorrect alignment by padding
3373 * the request with dummy pages.
3375 start_padding_sectors = blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK;
3376 end_sector_offset = (blk_rq_pos(req) + blk_rq_sectors(req)) %
3377 DASD_RAW_SECTORS_PER_TRACK;
3378 end_padding_sectors = (DASD_RAW_SECTORS_PER_TRACK - end_sector_offset) %
3379 DASD_RAW_SECTORS_PER_TRACK;
3380 basedev = block->base;
3381 if ((start_padding_sectors || end_padding_sectors) &&
3382 (rq_data_dir(req) == WRITE)) {
3383 DBF_DEV_EVENT(DBF_ERR, basedev,
3384 "raw write not track aligned (%lu,%lu) req %p",
3385 start_padding_sectors, end_padding_sectors, req);
3386 cqr = ERR_PTR(-EINVAL);
3390 first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK;
3391 last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) /
3392 DASD_RAW_SECTORS_PER_TRACK;
3393 trkcount = last_trk - first_trk + 1;
3396 if (rq_data_dir(req) == READ)
3397 cmd = DASD_ECKD_CCW_READ_TRACK;
3398 else if (rq_data_dir(req) == WRITE)
3399 cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK;
3401 cqr = ERR_PTR(-EINVAL);
3406 * Raw track based I/O needs IDAWs for each page,
3407 * and not just for 64 bit addresses.
3409 cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK;
3411 /* 1x prefix + one read/write ccw per track */
3412 cplength = 1 + trkcount;
3415 * struct PFX_eckd_data has up to 2 byte as extended parameter
3416 * this is needed for write full track and has to be mentioned
3418 * add 8 instead of 2 to keep 8 byte boundary
3420 pfx_datasize = sizeof(struct PFX_eckd_data) + 8;
3422 datasize = pfx_datasize + cidaw * sizeof(unsigned long long);
3424 /* Allocate the ccw request. */
3425 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength,
3426 datasize, startdev);
3431 if (prefix_LRE(ccw++, cqr->data, first_trk, last_trk, cmd,
3432 basedev, startdev, 1 /* format */, first_offs + 1,
3433 trkcount, 0, 0) == -EAGAIN) {
3434 /* Clock not in sync and XRC is enabled.
3437 dasd_sfree_request(cqr, startdev);
3438 cqr = ERR_PTR(-EAGAIN);
3442 idaws = (unsigned long *)(cqr->data + pfx_datasize);
3443 len_to_track_end = 0;
3444 if (start_padding_sectors) {
3445 ccw[-1].flags |= CCW_FLAG_CC;
3446 ccw->cmd_code = cmd;
3447 /* maximum 3390 track size */
3449 /* 64k map to one track */
3450 len_to_track_end = 65536 - start_padding_sectors * 512;
3451 ccw->cda = (__u32)(addr_t)idaws;
3452 ccw->flags |= CCW_FLAG_IDA;
3453 ccw->flags |= CCW_FLAG_SLI;
3455 for (sectors = 0; sectors < start_padding_sectors; sectors += 8)
3456 idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE);
3458 rq_for_each_segment(bv, req, iter) {
3459 dst = page_address(bv.bv_page) + bv.bv_offset;
3460 seg_len = bv.bv_len;
3461 if (cmd == DASD_ECKD_CCW_READ_TRACK)
3462 memset(dst, 0, seg_len);
3463 if (!len_to_track_end) {
3464 ccw[-1].flags |= CCW_FLAG_CC;
3465 ccw->cmd_code = cmd;
3466 /* maximum 3390 track size */
3468 /* 64k map to one track */
3469 len_to_track_end = 65536;
3470 ccw->cda = (__u32)(addr_t)idaws;
3471 ccw->flags |= CCW_FLAG_IDA;
3472 ccw->flags |= CCW_FLAG_SLI;
3475 len_to_track_end -= seg_len;
3476 idaws = idal_create_words(idaws, dst, seg_len);
3478 for (sectors = 0; sectors < end_padding_sectors; sectors += 8)
3479 idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE);
3480 if (blk_noretry_request(req) ||
3481 block->base->features & DASD_FEATURE_FAILFAST)
3482 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
3483 cqr->startdev = startdev;
3484 cqr->memdev = startdev;
3486 cqr->expires = startdev->default_expires * HZ;
3487 cqr->lpm = startdev->path_data.ppm;
3488 cqr->retries = startdev->default_retries;
3489 cqr->buildclk = get_tod_clock();
3490 cqr->status = DASD_CQR_FILLED;
3492 if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN)
3500 dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req)
3502 struct dasd_eckd_private *private;
3504 struct req_iterator iter;
3507 unsigned int blksize, blk_per_trk, off;
3511 if (!dasd_page_cache)
3513 private = (struct dasd_eckd_private *) cqr->block->base->private;
3514 blksize = cqr->block->bp_block;
3515 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
3516 recid = blk_rq_pos(req) >> cqr->block->s2b_shift;
3518 /* Skip over define extent & locate record. */
3520 if (private->uses_cdl == 0 || recid > 2*blk_per_trk)
3522 rq_for_each_segment(bv, req, iter) {
3523 dst = page_address(bv.bv_page) + bv.bv_offset;
3524 for (off = 0; off < bv.bv_len; off += blksize) {
3525 /* Skip locate record. */
3526 if (private->uses_cdl && recid <= 2*blk_per_trk)
3529 if (ccw->flags & CCW_FLAG_IDA)
3530 cda = *((char **)((addr_t) ccw->cda));
3532 cda = (char *)((addr_t) ccw->cda);
3534 if (rq_data_dir(req) == READ)
3535 memcpy(dst, cda, bv.bv_len);
3536 kmem_cache_free(dasd_page_cache,
3537 (void *)((addr_t)cda & PAGE_MASK));
3546 status = cqr->status == DASD_CQR_DONE;
3547 dasd_sfree_request(cqr, cqr->memdev);
3552 * Modify ccw/tcw in cqr so it can be started on a base device.
3554 * Note that this is not enough to restart the cqr!
3555 * Either reset cqr->startdev as well (summary unit check handling)
3556 * or restart via separate cqr (as in ERP handling).
3558 void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr)
3561 struct PFX_eckd_data *pfxdata;
3566 if (cqr->cpmode == 1) {
3568 tccb = tcw_get_tccb(tcw);
3569 dcw = (struct dcw *)&tccb->tca[0];
3570 pfxdata = (struct PFX_eckd_data *)&dcw->cd[0];
3571 pfxdata->validity.verify_base = 0;
3572 pfxdata->validity.hyper_pav = 0;
3575 pfxdata = cqr->data;
3576 if (ccw->cmd_code == DASD_ECKD_CCW_PFX) {
3577 pfxdata->validity.verify_base = 0;
3578 pfxdata->validity.hyper_pav = 0;
3583 #define DASD_ECKD_CHANQ_MAX_SIZE 4
3585 static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base,
3586 struct dasd_block *block,
3587 struct request *req)
3589 struct dasd_eckd_private *private;
3590 struct dasd_device *startdev;
3591 unsigned long flags;
3592 struct dasd_ccw_req *cqr;
3594 startdev = dasd_alias_get_start_dev(base);
3597 private = (struct dasd_eckd_private *) startdev->private;
3598 if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE)
3599 return ERR_PTR(-EBUSY);
3601 spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags);
3603 if ((base->features & DASD_FEATURE_USERAW))
3604 cqr = dasd_raw_build_cp(startdev, block, req);
3606 cqr = dasd_eckd_build_cp(startdev, block, req);
3609 spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags);
3613 static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr,
3614 struct request *req)
3616 struct dasd_eckd_private *private;
3617 unsigned long flags;
3619 spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags);
3620 private = (struct dasd_eckd_private *) cqr->memdev->private;
3622 spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags);
3623 return dasd_eckd_free_cp(cqr, req);
3627 dasd_eckd_fill_info(struct dasd_device * device,
3628 struct dasd_information2_t * info)
3630 struct dasd_eckd_private *private;
3632 private = (struct dasd_eckd_private *) device->private;
3633 info->label_block = 2;
3634 info->FBA_layout = private->uses_cdl ? 0 : 1;
3635 info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL;
3636 info->characteristics_size = sizeof(struct dasd_eckd_characteristics);
3637 memcpy(info->characteristics, &private->rdc_data,
3638 sizeof(struct dasd_eckd_characteristics));
3639 info->confdata_size = min((unsigned long)private->conf_len,
3640 sizeof(info->configuration_data));
3641 memcpy(info->configuration_data, private->conf_data,
3642 info->confdata_size);
3647 * SECTION: ioctl functions for eckd devices.
3651 * Release device ioctl.
3652 * Buils a channel programm to releases a prior reserved
3653 * (see dasd_eckd_reserve) device.
3656 dasd_eckd_release(struct dasd_device *device)
3658 struct dasd_ccw_req *cqr;
3663 if (!capable(CAP_SYS_ADMIN))
3667 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
3669 mutex_lock(&dasd_reserve_mutex);
3671 cqr = &dasd_reserve_req->cqr;
3672 memset(cqr, 0, sizeof(*cqr));
3673 memset(&dasd_reserve_req->ccw, 0,
3674 sizeof(dasd_reserve_req->ccw));
3675 cqr->cpaddr = &dasd_reserve_req->ccw;
3676 cqr->data = &dasd_reserve_req->data;
3677 cqr->magic = DASD_ECKD_MAGIC;
3680 ccw->cmd_code = DASD_ECKD_CCW_RELEASE;
3681 ccw->flags |= CCW_FLAG_SLI;
3683 ccw->cda = (__u32)(addr_t) cqr->data;
3684 cqr->startdev = device;
3685 cqr->memdev = device;
3686 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
3687 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
3688 cqr->retries = 2; /* set retry counter to enable basic ERP */
3689 cqr->expires = 2 * HZ;
3690 cqr->buildclk = get_tod_clock();
3691 cqr->status = DASD_CQR_FILLED;
3693 rc = dasd_sleep_on_immediatly(cqr);
3695 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags);
3698 mutex_unlock(&dasd_reserve_mutex);
3700 dasd_sfree_request(cqr, cqr->memdev);
3705 * Reserve device ioctl.
3706 * Options are set to 'synchronous wait for interrupt' and
3707 * 'timeout the request'. This leads to a terminate IO if
3708 * the interrupt is outstanding for a certain time.
3711 dasd_eckd_reserve(struct dasd_device *device)
3713 struct dasd_ccw_req *cqr;
3718 if (!capable(CAP_SYS_ADMIN))
3722 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
3724 mutex_lock(&dasd_reserve_mutex);
3726 cqr = &dasd_reserve_req->cqr;
3727 memset(cqr, 0, sizeof(*cqr));
3728 memset(&dasd_reserve_req->ccw, 0,
3729 sizeof(dasd_reserve_req->ccw));
3730 cqr->cpaddr = &dasd_reserve_req->ccw;
3731 cqr->data = &dasd_reserve_req->data;
3732 cqr->magic = DASD_ECKD_MAGIC;
3735 ccw->cmd_code = DASD_ECKD_CCW_RESERVE;
3736 ccw->flags |= CCW_FLAG_SLI;
3738 ccw->cda = (__u32)(addr_t) cqr->data;
3739 cqr->startdev = device;
3740 cqr->memdev = device;
3741 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
3742 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
3743 cqr->retries = 2; /* set retry counter to enable basic ERP */
3744 cqr->expires = 2 * HZ;
3745 cqr->buildclk = get_tod_clock();
3746 cqr->status = DASD_CQR_FILLED;
3748 rc = dasd_sleep_on_immediatly(cqr);
3750 set_bit(DASD_FLAG_IS_RESERVED, &device->flags);
3753 mutex_unlock(&dasd_reserve_mutex);
3755 dasd_sfree_request(cqr, cqr->memdev);
3760 * Steal lock ioctl - unconditional reserve device.
3761 * Buils a channel programm to break a device's reservation.
3762 * (unconditional reserve)
3765 dasd_eckd_steal_lock(struct dasd_device *device)
3767 struct dasd_ccw_req *cqr;
3772 if (!capable(CAP_SYS_ADMIN))
3776 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
3778 mutex_lock(&dasd_reserve_mutex);
3780 cqr = &dasd_reserve_req->cqr;
3781 memset(cqr, 0, sizeof(*cqr));
3782 memset(&dasd_reserve_req->ccw, 0,
3783 sizeof(dasd_reserve_req->ccw));
3784 cqr->cpaddr = &dasd_reserve_req->ccw;
3785 cqr->data = &dasd_reserve_req->data;
3786 cqr->magic = DASD_ECKD_MAGIC;
3789 ccw->cmd_code = DASD_ECKD_CCW_SLCK;
3790 ccw->flags |= CCW_FLAG_SLI;
3792 ccw->cda = (__u32)(addr_t) cqr->data;
3793 cqr->startdev = device;
3794 cqr->memdev = device;
3795 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
3796 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
3797 cqr->retries = 2; /* set retry counter to enable basic ERP */
3798 cqr->expires = 2 * HZ;
3799 cqr->buildclk = get_tod_clock();
3800 cqr->status = DASD_CQR_FILLED;
3802 rc = dasd_sleep_on_immediatly(cqr);
3804 set_bit(DASD_FLAG_IS_RESERVED, &device->flags);
3807 mutex_unlock(&dasd_reserve_mutex);
3809 dasd_sfree_request(cqr, cqr->memdev);
3814 * SNID - Sense Path Group ID
3815 * This ioctl may be used in situations where I/O is stalled due to
3816 * a reserve, so if the normal dasd_smalloc_request fails, we use the
3817 * preallocated dasd_reserve_req.
3819 static int dasd_eckd_snid(struct dasd_device *device,
3822 struct dasd_ccw_req *cqr;
3826 struct dasd_snid_ioctl_data usrparm;
3828 if (!capable(CAP_SYS_ADMIN))
3831 if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
3835 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1,
3836 sizeof(struct dasd_snid_data), device);
3838 mutex_lock(&dasd_reserve_mutex);
3840 cqr = &dasd_reserve_req->cqr;
3841 memset(cqr, 0, sizeof(*cqr));
3842 memset(&dasd_reserve_req->ccw, 0,
3843 sizeof(dasd_reserve_req->ccw));
3844 cqr->cpaddr = &dasd_reserve_req->ccw;
3845 cqr->data = &dasd_reserve_req->data;
3846 cqr->magic = DASD_ECKD_MAGIC;
3849 ccw->cmd_code = DASD_ECKD_CCW_SNID;
3850 ccw->flags |= CCW_FLAG_SLI;
3852 ccw->cda = (__u32)(addr_t) cqr->data;
3853 cqr->startdev = device;
3854 cqr->memdev = device;
3855 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
3856 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
3857 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags);
3859 cqr->expires = 10 * HZ;
3860 cqr->buildclk = get_tod_clock();
3861 cqr->status = DASD_CQR_FILLED;
3862 cqr->lpm = usrparm.path_mask;
3864 rc = dasd_sleep_on_immediatly(cqr);
3865 /* verify that I/O processing didn't modify the path mask */
3866 if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask))
3869 usrparm.data = *((struct dasd_snid_data *)cqr->data);
3870 if (copy_to_user(argp, &usrparm, sizeof(usrparm)))
3875 mutex_unlock(&dasd_reserve_mutex);
3877 dasd_sfree_request(cqr, cqr->memdev);
3882 * Read performance statistics
3885 dasd_eckd_performance(struct dasd_device *device, void __user *argp)
3887 struct dasd_psf_prssd_data *prssdp;
3888 struct dasd_rssd_perf_stats_t *stats;
3889 struct dasd_ccw_req *cqr;
3893 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
3894 (sizeof(struct dasd_psf_prssd_data) +
3895 sizeof(struct dasd_rssd_perf_stats_t)),
3898 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
3899 "Could not allocate initialization request");
3900 return PTR_ERR(cqr);
3902 cqr->startdev = device;
3903 cqr->memdev = device;
3905 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
3906 cqr->expires = 10 * HZ;
3908 /* Prepare for Read Subsystem Data */
3909 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
3910 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
3911 prssdp->order = PSF_ORDER_PRSSD;
3912 prssdp->suborder = 0x01; /* Performance Statistics */
3913 prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */
3916 ccw->cmd_code = DASD_ECKD_CCW_PSF;
3917 ccw->count = sizeof(struct dasd_psf_prssd_data);
3918 ccw->flags |= CCW_FLAG_CC;
3919 ccw->cda = (__u32)(addr_t) prssdp;
3921 /* Read Subsystem Data - Performance Statistics */
3922 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
3923 memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t));
3926 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
3927 ccw->count = sizeof(struct dasd_rssd_perf_stats_t);
3928 ccw->cda = (__u32)(addr_t) stats;
3930 cqr->buildclk = get_tod_clock();
3931 cqr->status = DASD_CQR_FILLED;
3932 rc = dasd_sleep_on(cqr);
3934 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
3935 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
3936 if (copy_to_user(argp, stats,
3937 sizeof(struct dasd_rssd_perf_stats_t)))
3940 dasd_sfree_request(cqr, cqr->memdev);
3945 * Get attributes (cache operations)
3946 * Returnes the cache attributes used in Define Extend (DE).
3949 dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp)
3951 struct dasd_eckd_private *private =
3952 (struct dasd_eckd_private *)device->private;
3953 struct attrib_data_t attrib = private->attrib;
3956 if (!capable(CAP_SYS_ADMIN))
3962 if (copy_to_user(argp, (long *) &attrib,
3963 sizeof(struct attrib_data_t)))
3970 * Set attributes (cache operations)
3971 * Stores the attributes for cache operation to be used in Define Extend (DE).
3974 dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp)
3976 struct dasd_eckd_private *private =
3977 (struct dasd_eckd_private *)device->private;
3978 struct attrib_data_t attrib;
3980 if (!capable(CAP_SYS_ADMIN))
3985 if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t)))
3987 private->attrib = attrib;
3989 dev_info(&device->cdev->dev,
3990 "The DASD cache mode was set to %x (%i cylinder prestage)\n",
3991 private->attrib.operation, private->attrib.nr_cyl);
3996 * Issue syscall I/O to EMC Symmetrix array.
3997 * CCWs are PSF and RSSD
3999 static int dasd_symm_io(struct dasd_device *device, void __user *argp)
4001 struct dasd_symmio_parms usrparm;
4002 char *psf_data, *rssd_result;
4003 struct dasd_ccw_req *cqr;
4008 if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
4012 /* Copy parms from caller */
4014 if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
4016 if (is_compat_task()) {
4017 /* Make sure pointers are sane even on 31 bit. */
4019 if ((usrparm.psf_data >> 32) != 0)
4021 if ((usrparm.rssd_result >> 32) != 0)
4023 usrparm.psf_data &= 0x7fffffffULL;
4024 usrparm.rssd_result &= 0x7fffffffULL;
4026 /* at least 2 bytes are accessed and should be allocated */
4027 if (usrparm.psf_data_len < 2) {
4028 DBF_DEV_EVENT(DBF_WARNING, device,
4029 "Symmetrix ioctl invalid data length %d",
4030 usrparm.psf_data_len);
4034 /* alloc I/O data area */
4035 psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA);
4036 rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA);
4037 if (!psf_data || !rssd_result) {
4042 /* get syscall header from user space */
4044 if (copy_from_user(psf_data,
4045 (void __user *)(unsigned long) usrparm.psf_data,
4046 usrparm.psf_data_len))
4051 /* setup CCWs for PSF + RSSD */
4052 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device);
4054 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
4055 "Could not allocate initialization request");
4060 cqr->startdev = device;
4061 cqr->memdev = device;
4063 cqr->expires = 10 * HZ;
4064 cqr->buildclk = get_tod_clock();
4065 cqr->status = DASD_CQR_FILLED;
4067 /* Build the ccws */
4071 ccw->cmd_code = DASD_ECKD_CCW_PSF;
4072 ccw->count = usrparm.psf_data_len;
4073 ccw->flags |= CCW_FLAG_CC;
4074 ccw->cda = (__u32)(addr_t) psf_data;
4079 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
4080 ccw->count = usrparm.rssd_result_len;
4081 ccw->flags = CCW_FLAG_SLI ;
4082 ccw->cda = (__u32)(addr_t) rssd_result;
4084 rc = dasd_sleep_on(cqr);
4089 if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result,
4090 rssd_result, usrparm.rssd_result_len))
4095 dasd_sfree_request(cqr, cqr->memdev);
4100 DBF_DEV_EVENT(DBF_WARNING, device,
4101 "Symmetrix ioctl (0x%02x 0x%02x): rc=%d",
4102 (int) psf0, (int) psf1, rc);
4107 dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp)
4109 struct dasd_device *device = block->base;
4113 return dasd_eckd_get_attrib(device, argp);
4115 return dasd_eckd_set_attrib(device, argp);
4117 return dasd_eckd_performance(device, argp);
4119 return dasd_eckd_release(device);
4121 return dasd_eckd_reserve(device);
4123 return dasd_eckd_steal_lock(device);
4125 return dasd_eckd_snid(device, argp);
4127 return dasd_symm_io(device, argp);
4134 * Dump the range of CCWs into 'page' buffer
4135 * and return number of printed chars.
4138 dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page)
4144 while (from <= to) {
4145 len += sprintf(page + len, PRINTK_HEADER
4146 " CCW %p: %08X %08X DAT:",
4147 from, ((int *) from)[0], ((int *) from)[1]);
4149 /* get pointer to data (consider IDALs) */
4150 if (from->flags & CCW_FLAG_IDA)
4151 datap = (char *) *((addr_t *) (addr_t) from->cda);
4153 datap = (char *) ((addr_t) from->cda);
4155 /* dump data (max 32 bytes) */
4156 for (count = 0; count < from->count && count < 32; count++) {
4157 if (count % 8 == 0) len += sprintf(page + len, " ");
4158 if (count % 4 == 0) len += sprintf(page + len, " ");
4159 len += sprintf(page + len, "%02x", datap[count]);
4161 len += sprintf(page + len, "\n");
4168 dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb,
4174 sense = (u64 *) dasd_get_sense(irb);
4175 stat = (u64 *) &irb->scsw;
4177 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : "
4178 "%016llx %016llx %016llx %016llx",
4179 reason, *stat, *((u32 *) (stat + 1)),
4180 sense[0], sense[1], sense[2], sense[3]);
4182 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s",
4183 reason, *stat, *((u32 *) (stat + 1)),
4189 * Print sense data and related channel program.
4190 * Parts are printed because printk buffer is only 1024 bytes.
4192 static void dasd_eckd_dump_sense_ccw(struct dasd_device *device,
4193 struct dasd_ccw_req *req, struct irb *irb)
4196 struct ccw1 *first, *last, *fail, *from, *to;
4199 page = (char *) get_zeroed_page(GFP_ATOMIC);
4201 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
4202 "No memory to dump sense data\n");
4205 /* dump the sense data */
4206 len = sprintf(page, PRINTK_HEADER
4207 " I/O status report for device %s:\n",
4208 dev_name(&device->cdev->dev));
4209 len += sprintf(page + len, PRINTK_HEADER
4210 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X "
4212 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw),
4213 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw),
4214 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw),
4215 req ? req->intrc : 0);
4216 len += sprintf(page + len, PRINTK_HEADER
4217 " device %s: Failing CCW: %p\n",
4218 dev_name(&device->cdev->dev),
4219 (void *) (addr_t) irb->scsw.cmd.cpa);
4220 if (irb->esw.esw0.erw.cons) {
4221 for (sl = 0; sl < 4; sl++) {
4222 len += sprintf(page + len, PRINTK_HEADER
4223 " Sense(hex) %2d-%2d:",
4224 (8 * sl), ((8 * sl) + 7));
4226 for (sct = 0; sct < 8; sct++) {
4227 len += sprintf(page + len, " %02x",
4228 irb->ecw[8 * sl + sct]);
4230 len += sprintf(page + len, "\n");
4233 if (irb->ecw[27] & DASD_SENSE_BIT_0) {
4234 /* 24 Byte Sense Data */
4235 sprintf(page + len, PRINTK_HEADER
4236 " 24 Byte: %x MSG %x, "
4237 "%s MSGb to SYSOP\n",
4238 irb->ecw[7] >> 4, irb->ecw[7] & 0x0f,
4239 irb->ecw[1] & 0x10 ? "" : "no");
4241 /* 32 Byte Sense Data */
4242 sprintf(page + len, PRINTK_HEADER
4243 " 32 Byte: Format: %x "
4244 "Exception class %x\n",
4245 irb->ecw[6] & 0x0f, irb->ecw[22] >> 4);
4248 sprintf(page + len, PRINTK_HEADER
4249 " SORRY - NO VALID SENSE AVAILABLE\n");
4251 printk(KERN_ERR "%s", page);
4254 /* req == NULL for unsolicited interrupts */
4255 /* dump the Channel Program (max 140 Bytes per line) */
4256 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */
4257 first = req->cpaddr;
4258 for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++);
4259 to = min(first + 6, last);
4260 len = sprintf(page, PRINTK_HEADER
4261 " Related CP in req: %p\n", req);
4262 dasd_eckd_dump_ccw_range(first, to, page + len);
4263 printk(KERN_ERR "%s", page);
4265 /* print failing CCW area (maximum 4) */
4266 /* scsw->cda is either valid or zero */
4269 fail = (struct ccw1 *)(addr_t)
4270 irb->scsw.cmd.cpa; /* failing CCW */
4271 if (from < fail - 2) {
4272 from = fail - 2; /* there is a gap - print header */
4273 len += sprintf(page, PRINTK_HEADER "......\n");
4275 to = min(fail + 1, last);
4276 len += dasd_eckd_dump_ccw_range(from, to, page + len);
4278 /* print last CCWs (maximum 2) */
4279 from = max(from, ++to);
4280 if (from < last - 1) {
4281 from = last - 1; /* there is a gap - print header */
4282 len += sprintf(page + len, PRINTK_HEADER "......\n");
4284 len += dasd_eckd_dump_ccw_range(from, last, page + len);
4286 printk(KERN_ERR "%s", page);
4288 free_page((unsigned long) page);
4293 * Print sense data from a tcw.
4295 static void dasd_eckd_dump_sense_tcw(struct dasd_device *device,
4296 struct dasd_ccw_req *req, struct irb *irb)
4299 int len, sl, sct, residual;
4303 page = (char *) get_zeroed_page(GFP_ATOMIC);
4305 DBF_DEV_EVENT(DBF_WARNING, device, " %s",
4306 "No memory to dump sense data");
4309 /* dump the sense data */
4310 len = sprintf(page, PRINTK_HEADER
4311 " I/O status report for device %s:\n",
4312 dev_name(&device->cdev->dev));
4313 len += sprintf(page + len, PRINTK_HEADER
4314 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X "
4315 "CS:%02X fcxs:%02X schxs:%02X RC:%d\n",
4316 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw),
4317 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw),
4318 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw),
4319 irb->scsw.tm.fcxs, irb->scsw.tm.schxs,
4320 req ? req->intrc : 0);
4321 len += sprintf(page + len, PRINTK_HEADER
4322 " device %s: Failing TCW: %p\n",
4323 dev_name(&device->cdev->dev),
4324 (void *) (addr_t) irb->scsw.tm.tcw);
4328 if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01))
4330 (struct tcw *)(unsigned long)irb->scsw.tm.tcw);
4333 len += sprintf(page + len, PRINTK_HEADER
4334 " tsb->length %d\n", tsb->length);
4335 len += sprintf(page + len, PRINTK_HEADER
4336 " tsb->flags %x\n", tsb->flags);
4337 len += sprintf(page + len, PRINTK_HEADER
4338 " tsb->dcw_offset %d\n", tsb->dcw_offset);
4339 len += sprintf(page + len, PRINTK_HEADER
4340 " tsb->count %d\n", tsb->count);
4341 residual = tsb->count - 28;
4342 len += sprintf(page + len, PRINTK_HEADER
4343 " residual %d\n", residual);
4345 switch (tsb->flags & 0x07) {
4346 case 1: /* tsa_iostat */
4347 len += sprintf(page + len, PRINTK_HEADER
4348 " tsb->tsa.iostat.dev_time %d\n",
4349 tsb->tsa.iostat.dev_time);
4350 len += sprintf(page + len, PRINTK_HEADER
4351 " tsb->tsa.iostat.def_time %d\n",
4352 tsb->tsa.iostat.def_time);
4353 len += sprintf(page + len, PRINTK_HEADER
4354 " tsb->tsa.iostat.queue_time %d\n",
4355 tsb->tsa.iostat.queue_time);
4356 len += sprintf(page + len, PRINTK_HEADER
4357 " tsb->tsa.iostat.dev_busy_time %d\n",
4358 tsb->tsa.iostat.dev_busy_time);
4359 len += sprintf(page + len, PRINTK_HEADER
4360 " tsb->tsa.iostat.dev_act_time %d\n",
4361 tsb->tsa.iostat.dev_act_time);
4362 sense = tsb->tsa.iostat.sense;
4364 case 2: /* ts_ddpc */
4365 len += sprintf(page + len, PRINTK_HEADER
4366 " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc);
4367 for (sl = 0; sl < 2; sl++) {
4368 len += sprintf(page + len, PRINTK_HEADER
4369 " tsb->tsa.ddpc.rcq %2d-%2d: ",
4370 (8 * sl), ((8 * sl) + 7));
4371 rcq = tsb->tsa.ddpc.rcq;
4372 for (sct = 0; sct < 8; sct++) {
4373 len += sprintf(page + len, " %02x",
4376 len += sprintf(page + len, "\n");
4378 sense = tsb->tsa.ddpc.sense;
4380 case 3: /* tsa_intrg */
4381 len += sprintf(page + len, PRINTK_HEADER
4382 " tsb->tsa.intrg.: not supportet yet\n");
4387 for (sl = 0; sl < 4; sl++) {
4388 len += sprintf(page + len, PRINTK_HEADER
4389 " Sense(hex) %2d-%2d:",
4390 (8 * sl), ((8 * sl) + 7));
4391 for (sct = 0; sct < 8; sct++) {
4392 len += sprintf(page + len, " %02x",
4393 sense[8 * sl + sct]);
4395 len += sprintf(page + len, "\n");
4398 if (sense[27] & DASD_SENSE_BIT_0) {
4399 /* 24 Byte Sense Data */
4400 sprintf(page + len, PRINTK_HEADER
4401 " 24 Byte: %x MSG %x, "
4402 "%s MSGb to SYSOP\n",
4403 sense[7] >> 4, sense[7] & 0x0f,
4404 sense[1] & 0x10 ? "" : "no");
4406 /* 32 Byte Sense Data */
4407 sprintf(page + len, PRINTK_HEADER
4408 " 32 Byte: Format: %x "
4409 "Exception class %x\n",
4410 sense[6] & 0x0f, sense[22] >> 4);
4413 sprintf(page + len, PRINTK_HEADER
4414 " SORRY - NO VALID SENSE AVAILABLE\n");
4417 sprintf(page + len, PRINTK_HEADER
4418 " SORRY - NO TSB DATA AVAILABLE\n");
4420 printk(KERN_ERR "%s", page);
4421 free_page((unsigned long) page);
4424 static void dasd_eckd_dump_sense(struct dasd_device *device,
4425 struct dasd_ccw_req *req, struct irb *irb)
4427 if (scsw_is_tm(&irb->scsw))
4428 dasd_eckd_dump_sense_tcw(device, req, irb);
4430 dasd_eckd_dump_sense_ccw(device, req, irb);
4433 static int dasd_eckd_pm_freeze(struct dasd_device *device)
4436 * the device should be disconnected from our LCU structure
4437 * on restore we will reconnect it and reread LCU specific
4438 * information like PAV support that might have changed
4440 dasd_alias_remove_device(device);
4441 dasd_alias_disconnect_device_from_lcu(device);
4446 static int dasd_eckd_restore_device(struct dasd_device *device)
4448 struct dasd_eckd_private *private;
4449 struct dasd_eckd_characteristics temp_rdc_data;
4451 struct dasd_uid temp_uid;
4452 unsigned long flags;
4453 unsigned long cqr_flags = 0;
4455 private = (struct dasd_eckd_private *) device->private;
4457 /* Read Configuration Data */
4458 rc = dasd_eckd_read_conf(device);
4460 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
4461 "Read configuration data failed, rc=%d", rc);
4465 dasd_eckd_get_uid(device, &temp_uid);
4466 /* Generate device unique id */
4467 rc = dasd_eckd_generate_uid(device);
4468 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
4469 if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0)
4470 dev_err(&device->cdev->dev, "The UID of the DASD has "
4472 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
4476 /* register lcu with alias handling, enable PAV if this is a new lcu */
4477 rc = dasd_alias_make_device_known_to_lcu(device);
4481 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags);
4482 dasd_eckd_validate_server(device, cqr_flags);
4484 /* RE-Read Configuration Data */
4485 rc = dasd_eckd_read_conf(device);
4487 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
4488 "Read configuration data failed, rc=%d", rc);
4492 /* Read Feature Codes */
4493 dasd_eckd_read_features(device);
4495 /* Read Device Characteristics */
4496 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
4497 &temp_rdc_data, 64);
4499 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
4500 "Read device characteristic failed, rc=%d", rc);
4503 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
4504 memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data));
4505 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
4507 /* add device to alias management */
4508 dasd_alias_add_device(device);
4513 dasd_alias_disconnect_device_from_lcu(device);
4518 static int dasd_eckd_reload_device(struct dasd_device *device)
4520 struct dasd_eckd_private *private;
4523 struct dasd_uid uid;
4524 unsigned long flags;
4526 private = (struct dasd_eckd_private *) device->private;
4528 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
4529 old_base = private->uid.base_unit_addr;
4530 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
4532 /* Read Configuration Data */
4533 rc = dasd_eckd_read_conf(device);
4537 rc = dasd_eckd_generate_uid(device);
4541 * update unit address configuration and
4542 * add device to alias management
4544 dasd_alias_update_add_device(device);
4546 dasd_eckd_get_uid(device, &uid);
4548 if (old_base != uid.base_unit_addr) {
4549 if (strlen(uid.vduit) > 0)
4550 snprintf(print_uid, sizeof(print_uid),
4551 "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial,
4552 uid.ssid, uid.base_unit_addr, uid.vduit);
4554 snprintf(print_uid, sizeof(print_uid),
4555 "%s.%s.%04x.%02x", uid.vendor, uid.serial,
4556 uid.ssid, uid.base_unit_addr);
4558 dev_info(&device->cdev->dev,
4559 "An Alias device was reassigned to a new base device "
4560 "with UID: %s\n", print_uid);
4568 static int dasd_eckd_read_message_buffer(struct dasd_device *device,
4569 struct dasd_rssd_messages *messages,
4572 struct dasd_rssd_messages *message_buf;
4573 struct dasd_psf_prssd_data *prssdp;
4574 struct dasd_eckd_private *private;
4575 struct dasd_ccw_req *cqr;
4579 private = (struct dasd_eckd_private *) device->private;
4580 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
4581 (sizeof(struct dasd_psf_prssd_data) +
4582 sizeof(struct dasd_rssd_messages)),
4585 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
4586 "Could not allocate read message buffer request");
4587 return PTR_ERR(cqr);
4590 cqr->startdev = device;
4591 cqr->memdev = device;
4593 cqr->expires = 10 * HZ;
4594 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags);
4595 /* dasd_sleep_on_immediatly does not do complex error
4596 * recovery so clear erp flag and set retry counter to
4598 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
4601 /* Prepare for Read Subsystem Data */
4602 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
4603 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
4604 prssdp->order = PSF_ORDER_PRSSD;
4605 prssdp->suborder = 0x03; /* Message Buffer */
4606 /* all other bytes of prssdp must be zero */
4609 ccw->cmd_code = DASD_ECKD_CCW_PSF;
4610 ccw->count = sizeof(struct dasd_psf_prssd_data);
4611 ccw->flags |= CCW_FLAG_CC;
4612 ccw->flags |= CCW_FLAG_SLI;
4613 ccw->cda = (__u32)(addr_t) prssdp;
4615 /* Read Subsystem Data - message buffer */
4616 message_buf = (struct dasd_rssd_messages *) (prssdp + 1);
4617 memset(message_buf, 0, sizeof(struct dasd_rssd_messages));
4620 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
4621 ccw->count = sizeof(struct dasd_rssd_messages);
4622 ccw->flags |= CCW_FLAG_SLI;
4623 ccw->cda = (__u32)(addr_t) message_buf;
4625 cqr->buildclk = get_tod_clock();
4626 cqr->status = DASD_CQR_FILLED;
4627 rc = dasd_sleep_on_immediatly(cqr);
4629 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
4630 message_buf = (struct dasd_rssd_messages *)
4632 memcpy(messages, message_buf,
4633 sizeof(struct dasd_rssd_messages));
4635 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
4636 "Reading messages failed with rc=%d\n"
4638 dasd_sfree_request(cqr, cqr->memdev);
4643 * Perform Subsystem Function - CUIR response
4646 dasd_eckd_psf_cuir_response(struct dasd_device *device, int response,
4648 struct channel_path_desc *desc,
4649 struct subchannel_id sch_id)
4651 struct dasd_psf_cuir_response *psf_cuir;
4652 struct dasd_ccw_req *cqr;
4656 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ ,
4657 sizeof(struct dasd_psf_cuir_response),
4661 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
4662 "Could not allocate PSF-CUIR request");
4663 return PTR_ERR(cqr);
4666 psf_cuir = (struct dasd_psf_cuir_response *)cqr->data;
4667 psf_cuir->order = PSF_ORDER_CUIR_RESPONSE;
4668 psf_cuir->cc = response;
4670 psf_cuir->chpid = desc->chpid;
4671 psf_cuir->message_id = message_id;
4672 psf_cuir->cssid = sch_id.cssid;
4673 psf_cuir->ssid = sch_id.ssid;
4675 ccw->cmd_code = DASD_ECKD_CCW_PSF;
4676 ccw->cda = (__u32)(addr_t)psf_cuir;
4677 ccw->flags = CCW_FLAG_SLI;
4678 ccw->count = sizeof(struct dasd_psf_cuir_response);
4680 cqr->startdev = device;
4681 cqr->memdev = device;
4684 cqr->expires = 10*HZ;
4685 cqr->buildclk = get_tod_clock();
4686 cqr->status = DASD_CQR_FILLED;
4687 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags);
4689 rc = dasd_sleep_on(cqr);
4691 dasd_sfree_request(cqr, cqr->memdev);
4696 * return configuration data that is referenced by record selector
4697 * if a record selector is specified or per default return the
4698 * conf_data pointer for the path specified by lpum
4700 static struct dasd_conf_data *dasd_eckd_get_ref_conf(struct dasd_device *device,
4702 struct dasd_cuir_message *cuir)
4704 struct dasd_eckd_private *private;
4705 struct dasd_conf_data *conf_data;
4708 private = (struct dasd_eckd_private *) device->private;
4709 if (cuir->record_selector == 0)
4711 for (path = 0x80, pos = 0; path; path >>= 1, pos++) {
4712 conf_data = private->path_conf_data[pos];
4713 if (conf_data->gneq.record_selector ==
4714 cuir->record_selector)
4718 return private->path_conf_data[pathmask_to_pos(lpum)];
4722 * This function determines the scope of a reconfiguration request by
4723 * analysing the path and device selection data provided in the CUIR request.
4724 * Returns a path mask containing CUIR affected paths for the give device.
4726 * If the CUIR request does not contain the required information return the
4727 * path mask of the path the attention message for the CUIR request was reveived
4730 static int dasd_eckd_cuir_scope(struct dasd_device *device, __u8 lpum,
4731 struct dasd_cuir_message *cuir)
4733 struct dasd_conf_data *ref_conf_data;
4734 unsigned long bitmask = 0, mask = 0;
4735 struct dasd_eckd_private *private;
4736 struct dasd_conf_data *conf_data;
4737 unsigned int pos, path;
4738 char *ref_gneq, *gneq;
4739 char *ref_ned, *ned;
4742 /* if CUIR request does not specify the scope use the path
4743 the attention message was presented on */
4744 if (!cuir->ned_map ||
4745 !(cuir->neq_map[0] | cuir->neq_map[1] | cuir->neq_map[2]))
4748 private = (struct dasd_eckd_private *) device->private;
4749 /* get reference conf data */
4750 ref_conf_data = dasd_eckd_get_ref_conf(device, lpum, cuir);
4751 /* reference ned is determined by ned_map field */
4752 pos = 8 - ffs(cuir->ned_map);
4753 ref_ned = (char *)&ref_conf_data->neds[pos];
4754 ref_gneq = (char *)&ref_conf_data->gneq;
4755 /* transfer 24 bit neq_map to mask */
4756 mask = cuir->neq_map[2];
4757 mask |= cuir->neq_map[1] << 8;
4758 mask |= cuir->neq_map[0] << 16;
4760 for (path = 0x80; path; path >>= 1) {
4761 /* initialise data per path */
4763 pos = pathmask_to_pos(path);
4764 conf_data = private->path_conf_data[pos];
4765 pos = 8 - ffs(cuir->ned_map);
4766 ned = (char *) &conf_data->neds[pos];
4767 /* compare reference ned and per path ned */
4768 if (memcmp(ref_ned, ned, sizeof(*ned)) != 0)
4770 gneq = (char *)&conf_data->gneq;
4771 /* compare reference gneq and per_path gneq under
4772 24 bit mask where mask bit 0 equals byte 7 of
4773 the gneq and mask bit 24 equals byte 31 */
4775 pos = ffs(bitmask) - 1;
4776 if (memcmp(&ref_gneq[31 - pos], &gneq[31 - pos], 1)
4779 clear_bit(pos, &bitmask);
4783 /* device and path match the reference values
4784 add path to CUIR scope */
4790 static void dasd_eckd_cuir_notify_user(struct dasd_device *device,
4791 unsigned long paths,
4792 struct subchannel_id sch_id, int action)
4794 struct channel_path_desc *desc;
4798 /* get position of bit in mask */
4799 pos = ffs(paths) - 1;
4800 /* get channel path descriptor from this position */
4801 desc = ccw_device_get_chp_desc(device->cdev, 7 - pos);
4802 if (action == CUIR_QUIESCE)
4803 pr_warn("Service on the storage server caused path "
4804 "%x.%02x to go offline", sch_id.cssid,
4805 desc ? desc->chpid : 0);
4806 else if (action == CUIR_RESUME)
4807 pr_info("Path %x.%02x is back online after service "
4808 "on the storage server", sch_id.cssid,
4809 desc ? desc->chpid : 0);
4811 clear_bit(pos, &paths);
4815 static int dasd_eckd_cuir_remove_path(struct dasd_device *device, __u8 lpum,
4816 struct dasd_cuir_message *cuir)
4818 unsigned long tbcpm;
4820 tbcpm = dasd_eckd_cuir_scope(device, lpum, cuir);
4821 /* nothing to do if path is not in use */
4822 if (!(device->path_data.opm & tbcpm))
4824 if (!(device->path_data.opm & ~tbcpm)) {
4825 /* no path would be left if the CUIR action is taken
4829 /* remove device from operational path mask */
4830 device->path_data.opm &= ~tbcpm;
4831 device->path_data.cuirpm |= tbcpm;
4836 * walk through all devices and build a path mask to quiesce them
4837 * return an error if the last path to a device would be removed
4839 * if only part of the devices are quiesced and an error
4840 * occurs no onlining necessary, the storage server will
4841 * notify the already set offline devices again
4843 static int dasd_eckd_cuir_quiesce(struct dasd_device *device, __u8 lpum,
4844 struct subchannel_id sch_id,
4845 struct dasd_cuir_message *cuir)
4847 struct alias_pav_group *pavgroup, *tempgroup;
4848 struct dasd_eckd_private *private;
4849 struct dasd_device *dev, *n;
4850 unsigned long paths = 0;
4851 unsigned long flags;
4854 private = (struct dasd_eckd_private *) device->private;
4855 /* active devices */
4856 list_for_each_entry_safe(dev, n, &private->lcu->active_devices,
4858 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
4859 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
4860 spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags);
4865 /* inactive devices */
4866 list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices,
4868 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
4869 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
4870 spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags);
4875 /* devices in PAV groups */
4876 list_for_each_entry_safe(pavgroup, tempgroup,
4877 &private->lcu->grouplist, group) {
4878 list_for_each_entry_safe(dev, n, &pavgroup->baselist,
4880 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
4881 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
4882 spin_unlock_irqrestore(
4883 get_ccwdev_lock(dev->cdev), flags);
4888 list_for_each_entry_safe(dev, n, &pavgroup->aliaslist,
4890 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
4891 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
4892 spin_unlock_irqrestore(
4893 get_ccwdev_lock(dev->cdev), flags);
4899 /* notify user about all paths affected by CUIR action */
4900 dasd_eckd_cuir_notify_user(device, paths, sch_id, CUIR_QUIESCE);
4906 static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum,
4907 struct subchannel_id sch_id,
4908 struct dasd_cuir_message *cuir)
4910 struct alias_pav_group *pavgroup, *tempgroup;
4911 struct dasd_eckd_private *private;
4912 struct dasd_device *dev, *n;
4913 unsigned long paths = 0;
4916 private = (struct dasd_eckd_private *) device->private;
4918 * the path may have been added through a generic path event before
4919 * only trigger path verification if the path is not already in use
4921 list_for_each_entry_safe(dev, n,
4922 &private->lcu->active_devices,
4924 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
4926 if (!(dev->path_data.opm & tbcpm)) {
4927 dev->path_data.tbvpm |= tbcpm;
4928 dasd_schedule_device_bh(dev);
4931 list_for_each_entry_safe(dev, n,
4932 &private->lcu->inactive_devices,
4934 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
4936 if (!(dev->path_data.opm & tbcpm)) {
4937 dev->path_data.tbvpm |= tbcpm;
4938 dasd_schedule_device_bh(dev);
4941 /* devices in PAV groups */
4942 list_for_each_entry_safe(pavgroup, tempgroup,
4943 &private->lcu->grouplist,
4945 list_for_each_entry_safe(dev, n,
4946 &pavgroup->baselist,
4948 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
4950 if (!(dev->path_data.opm & tbcpm)) {
4951 dev->path_data.tbvpm |= tbcpm;
4952 dasd_schedule_device_bh(dev);
4955 list_for_each_entry_safe(dev, n,
4956 &pavgroup->aliaslist,
4958 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
4960 if (!(dev->path_data.opm & tbcpm)) {
4961 dev->path_data.tbvpm |= tbcpm;
4962 dasd_schedule_device_bh(dev);
4966 /* notify user about all paths affected by CUIR action */
4967 dasd_eckd_cuir_notify_user(device, paths, sch_id, CUIR_RESUME);
4971 static void dasd_eckd_handle_cuir(struct dasd_device *device, void *messages,
4974 struct dasd_cuir_message *cuir = messages;
4975 struct channel_path_desc *desc;
4976 struct subchannel_id sch_id;
4979 DBF_DEV_EVENT(DBF_WARNING, device,
4980 "CUIR request: %016llx %016llx %016llx %08x",
4981 ((u64 *)cuir)[0], ((u64 *)cuir)[1], ((u64 *)cuir)[2],
4983 ccw_device_get_schid(device->cdev, &sch_id);
4984 pos = pathmask_to_pos(lpum);
4985 desc = ccw_device_get_chp_desc(device->cdev, pos);
4987 if (cuir->code == CUIR_QUIESCE) {
4989 if (dasd_eckd_cuir_quiesce(device, lpum, sch_id, cuir))
4990 response = PSF_CUIR_LAST_PATH;
4992 response = PSF_CUIR_COMPLETED;
4993 } else if (cuir->code == CUIR_RESUME) {
4995 dasd_eckd_cuir_resume(device, lpum, sch_id, cuir);
4996 response = PSF_CUIR_COMPLETED;
4998 response = PSF_CUIR_NOT_SUPPORTED;
5000 dasd_eckd_psf_cuir_response(device, response,
5001 cuir->message_id, desc, sch_id);
5002 DBF_DEV_EVENT(DBF_WARNING, device,
5003 "CUIR response: %d on message ID %08x", response,
5005 /* free descriptor copy */
5007 /* to make sure there is no attention left schedule work again */
5008 device->discipline->check_attention(device, lpum);
5011 static void dasd_eckd_check_attention_work(struct work_struct *work)
5013 struct check_attention_work_data *data;
5014 struct dasd_rssd_messages *messages;
5015 struct dasd_device *device;
5018 data = container_of(work, struct check_attention_work_data, worker);
5019 device = data->device;
5020 messages = kzalloc(sizeof(*messages), GFP_KERNEL);
5022 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
5023 "Could not allocate attention message buffer");
5026 rc = dasd_eckd_read_message_buffer(device, messages, data->lpum);
5029 if (messages->length == ATTENTION_LENGTH_CUIR &&
5030 messages->format == ATTENTION_FORMAT_CUIR)
5031 dasd_eckd_handle_cuir(device, messages, data->lpum);
5033 dasd_put_device(device);
5038 static int dasd_eckd_check_attention(struct dasd_device *device, __u8 lpum)
5040 struct check_attention_work_data *data;
5042 data = kzalloc(sizeof(*data), GFP_ATOMIC);
5045 INIT_WORK(&data->worker, dasd_eckd_check_attention_work);
5046 dasd_get_device(device);
5047 data->device = device;
5049 schedule_work(&data->worker);
5053 static struct ccw_driver dasd_eckd_driver = {
5055 .name = "dasd-eckd",
5056 .owner = THIS_MODULE,
5058 .ids = dasd_eckd_ids,
5059 .probe = dasd_eckd_probe,
5060 .remove = dasd_generic_remove,
5061 .set_offline = dasd_generic_set_offline,
5062 .set_online = dasd_eckd_set_online,
5063 .notify = dasd_generic_notify,
5064 .path_event = dasd_generic_path_event,
5065 .shutdown = dasd_generic_shutdown,
5066 .freeze = dasd_generic_pm_freeze,
5067 .thaw = dasd_generic_restore_device,
5068 .restore = dasd_generic_restore_device,
5069 .uc_handler = dasd_generic_uc_handler,
5070 .int_class = IRQIO_DAS,
5074 * max_blocks is dependent on the amount of storage that is available
5075 * in the static io buffer for each device. Currently each device has
5076 * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has
5077 * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use
5078 * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In
5079 * addition we have one define extent ccw + 16 bytes of data and one
5080 * locate record ccw + 16 bytes of data. That makes:
5081 * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum.
5082 * We want to fit two into the available memory so that we can immediately
5083 * start the next request if one finishes off. That makes 249.5 blocks
5084 * for one request. Give a little safety and the result is 240.
5086 static struct dasd_discipline dasd_eckd_discipline = {
5087 .owner = THIS_MODULE,
5091 .check_device = dasd_eckd_check_characteristics,
5092 .uncheck_device = dasd_eckd_uncheck_device,
5093 .do_analysis = dasd_eckd_do_analysis,
5094 .verify_path = dasd_eckd_verify_path,
5095 .basic_to_ready = dasd_eckd_basic_to_ready,
5096 .online_to_ready = dasd_eckd_online_to_ready,
5097 .basic_to_known = dasd_eckd_basic_to_known,
5098 .fill_geometry = dasd_eckd_fill_geometry,
5099 .start_IO = dasd_start_IO,
5100 .term_IO = dasd_term_IO,
5101 .handle_terminated_request = dasd_eckd_handle_terminated_request,
5102 .format_device = dasd_eckd_format_device,
5103 .erp_action = dasd_eckd_erp_action,
5104 .erp_postaction = dasd_eckd_erp_postaction,
5105 .check_for_device_change = dasd_eckd_check_for_device_change,
5106 .build_cp = dasd_eckd_build_alias_cp,
5107 .free_cp = dasd_eckd_free_alias_cp,
5108 .dump_sense = dasd_eckd_dump_sense,
5109 .dump_sense_dbf = dasd_eckd_dump_sense_dbf,
5110 .fill_info = dasd_eckd_fill_info,
5111 .ioctl = dasd_eckd_ioctl,
5112 .freeze = dasd_eckd_pm_freeze,
5113 .restore = dasd_eckd_restore_device,
5114 .reload = dasd_eckd_reload_device,
5115 .get_uid = dasd_eckd_get_uid,
5116 .kick_validate = dasd_eckd_kick_validate_server,
5117 .check_attention = dasd_eckd_check_attention,
5121 dasd_eckd_init(void)
5125 ASCEBC(dasd_eckd_discipline.ebcname, 4);
5126 dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req),
5127 GFP_KERNEL | GFP_DMA);
5128 if (!dasd_reserve_req)
5130 path_verification_worker = kmalloc(sizeof(*path_verification_worker),
5131 GFP_KERNEL | GFP_DMA);
5132 if (!path_verification_worker) {
5133 kfree(dasd_reserve_req);
5136 rawpadpage = (void *)__get_free_page(GFP_KERNEL);
5138 kfree(path_verification_worker);
5139 kfree(dasd_reserve_req);
5142 ret = ccw_driver_register(&dasd_eckd_driver);
5144 wait_for_device_probe();
5146 kfree(path_verification_worker);
5147 kfree(dasd_reserve_req);
5148 free_page((unsigned long)rawpadpage);
5154 dasd_eckd_cleanup(void)
5156 ccw_driver_unregister(&dasd_eckd_driver);
5157 kfree(path_verification_worker);
5158 kfree(dasd_reserve_req);
5159 free_page((unsigned long)rawpadpage);
5162 module_init(dasd_eckd_init);
5163 module_exit(dasd_eckd_cleanup);