2 * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
3 * Horst Hummel <Horst.Hummel@de.ibm.com>
4 * Carsten Otte <Cotte@de.ibm.com>
5 * Martin Schwidefsky <schwidefsky@de.ibm.com>
6 * Bugreports.to..: <Linux390@de.ibm.com>
7 * Copyright IBM Corp. 1999, 2009
8 * EMC Symmetrix ioctl Copyright EMC Corporation, 2008
9 * Author.........: Nigel Hislop <hislop_nigel@emc.com>
12 #define KMSG_COMPONENT "dasd-eckd"
14 #include <linux/stddef.h>
15 #include <linux/kernel.h>
16 #include <linux/slab.h>
17 #include <linux/hdreg.h> /* HDIO_GETGEO */
18 #include <linux/bio.h>
19 #include <linux/module.h>
20 #include <linux/compat.h>
21 #include <linux/init.h>
22 #include <linux/seq_file.h>
24 #include <asm/css_chars.h>
25 #include <asm/debug.h>
26 #include <asm/idals.h>
27 #include <asm/ebcdic.h>
29 #include <asm/uaccess.h>
31 #include <asm/ccwdev.h>
33 #include <asm/schid.h>
34 #include <asm/chpid.h>
37 #include "dasd_eckd.h"
41 #endif /* PRINTK_HEADER */
42 #define PRINTK_HEADER "dasd(eckd):"
44 #define ECKD_C0(i) (i->home_bytes)
45 #define ECKD_F(i) (i->formula)
46 #define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\
47 (i->factors.f_0x02.f1))
48 #define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\
49 (i->factors.f_0x02.f2))
50 #define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\
51 (i->factors.f_0x02.f3))
52 #define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0)
53 #define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0)
54 #define ECKD_F6(i) (i->factor6)
55 #define ECKD_F7(i) (i->factor7)
56 #define ECKD_F8(i) (i->factor8)
59 * raw track access always map to 64k in memory
60 * so it maps to 16 blocks of 4k per track
62 #define DASD_RAW_BLOCK_PER_TRACK 16
63 #define DASD_RAW_BLOCKSIZE 4096
64 /* 64k are 128 x 512 byte sectors */
65 #define DASD_RAW_SECTORS_PER_TRACK 128
67 MODULE_LICENSE("GPL");
69 static struct dasd_discipline dasd_eckd_discipline
;
71 /* The ccw bus type uses this table to find devices that it sends to
73 static struct ccw_device_id dasd_eckd_ids
[] = {
74 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info
= 0x1},
75 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info
= 0x2},
76 { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3380, 0), .driver_info
= 0x3},
77 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info
= 0x4},
78 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info
= 0x5},
79 { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info
= 0x6},
80 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info
= 0x7},
81 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info
= 0x8},
82 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info
= 0x9},
83 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info
= 0xa},
84 { /* end of list */ },
87 MODULE_DEVICE_TABLE(ccw
, dasd_eckd_ids
);
89 static struct ccw_driver dasd_eckd_driver
; /* see below */
91 static void *rawpadpage
;
94 #define INIT_CQR_UNFORMATTED 1
95 #define INIT_CQR_ERROR 2
97 /* emergency request for reserve/release */
99 struct dasd_ccw_req cqr
;
103 static DEFINE_MUTEX(dasd_reserve_mutex
);
105 /* definitions for the path verification worker */
106 struct path_verification_work_data
{
107 struct work_struct worker
;
108 struct dasd_device
*device
;
109 struct dasd_ccw_req cqr
;
111 __u8 rcd_buffer
[DASD_ECKD_RCD_DATA_SIZE
];
115 static struct path_verification_work_data
*path_verification_worker
;
116 static DEFINE_MUTEX(dasd_path_verification_mutex
);
118 struct check_attention_work_data
{
119 struct work_struct worker
;
120 struct dasd_device
*device
;
124 static int prepare_itcw(struct itcw
*, unsigned int, unsigned int, int,
125 struct dasd_device
*, struct dasd_device
*,
126 unsigned int, int, unsigned int, unsigned int,
127 unsigned int, unsigned int);
129 /* initial attempt at a probe function. this can be simplified once
130 * the other detection code is gone */
132 dasd_eckd_probe (struct ccw_device
*cdev
)
136 /* set ECKD specific ccw-device options */
137 ret
= ccw_device_set_options(cdev
, CCWDEV_ALLOW_FORCE
|
138 CCWDEV_DO_PATHGROUP
| CCWDEV_DO_MULTIPATH
);
140 DBF_EVENT_DEVID(DBF_WARNING
, cdev
, "%s",
141 "dasd_eckd_probe: could not set "
142 "ccw-device options");
145 ret
= dasd_generic_probe(cdev
, &dasd_eckd_discipline
);
150 dasd_eckd_set_online(struct ccw_device
*cdev
)
152 return dasd_generic_set_online(cdev
, &dasd_eckd_discipline
);
155 static const int sizes_trk0
[] = { 28, 148, 84 };
156 #define LABEL_SIZE 140
158 /* head and record addresses of count_area read in analysis ccw */
159 static const int count_area_head
[] = { 0, 0, 0, 0, 2 };
160 static const int count_area_rec
[] = { 1, 2, 3, 4, 1 };
162 static inline unsigned int
163 round_up_multiple(unsigned int no
, unsigned int mult
)
166 return (rem
? no
- rem
+ mult
: no
);
169 static inline unsigned int
170 ceil_quot(unsigned int d1
, unsigned int d2
)
172 return (d1
+ (d2
- 1)) / d2
;
176 recs_per_track(struct dasd_eckd_characteristics
* rdc
,
177 unsigned int kl
, unsigned int dl
)
181 switch (rdc
->dev_type
) {
184 return 1499 / (15 + 7 + ceil_quot(kl
+ 12, 32) +
185 ceil_quot(dl
+ 12, 32));
187 return 1499 / (15 + ceil_quot(dl
+ 12, 32));
189 dn
= ceil_quot(dl
+ 6, 232) + 1;
191 kn
= ceil_quot(kl
+ 6, 232) + 1;
192 return 1729 / (10 + 9 + ceil_quot(kl
+ 6 * kn
, 34) +
193 9 + ceil_quot(dl
+ 6 * dn
, 34));
195 return 1729 / (10 + 9 + ceil_quot(dl
+ 6 * dn
, 34));
197 dn
= ceil_quot(dl
+ 6, 232) + 1;
199 kn
= ceil_quot(kl
+ 6, 232) + 1;
200 return 1420 / (18 + 7 + ceil_quot(kl
+ 6 * kn
, 34) +
201 ceil_quot(dl
+ 6 * dn
, 34));
203 return 1420 / (18 + 7 + ceil_quot(dl
+ 6 * dn
, 34));
208 static void set_ch_t(struct ch_t
*geo
, __u32 cyl
, __u8 head
)
210 geo
->cyl
= (__u16
) cyl
;
211 geo
->head
= cyl
>> 16;
217 check_XRC (struct ccw1
*de_ccw
,
218 struct DE_eckd_data
*data
,
219 struct dasd_device
*device
)
221 struct dasd_eckd_private
*private = device
->private;
224 if (!private->rdc_data
.facilities
.XRC_supported
)
227 /* switch on System Time Stamp - needed for XRC Support */
228 data
->ga_extended
|= 0x08; /* switch on 'Time Stamp Valid' */
229 data
->ga_extended
|= 0x02; /* switch on 'Extended Parameter' */
231 rc
= get_sync_clock(&data
->ep_sys_time
);
232 /* Ignore return code if sync clock is switched off. */
233 if (rc
== -EOPNOTSUPP
|| rc
== -EACCES
)
236 de_ccw
->count
= sizeof(struct DE_eckd_data
);
237 de_ccw
->flags
|= CCW_FLAG_SLI
;
242 define_extent(struct ccw1
*ccw
, struct DE_eckd_data
*data
, unsigned int trk
,
243 unsigned int totrk
, int cmd
, struct dasd_device
*device
)
245 struct dasd_eckd_private
*private = device
->private;
247 u16 heads
, beghead
, endhead
;
250 ccw
->cmd_code
= DASD_ECKD_CCW_DEFINE_EXTENT
;
253 ccw
->cda
= (__u32
) __pa(data
);
255 memset(data
, 0, sizeof(struct DE_eckd_data
));
257 case DASD_ECKD_CCW_READ_HOME_ADDRESS
:
258 case DASD_ECKD_CCW_READ_RECORD_ZERO
:
259 case DASD_ECKD_CCW_READ
:
260 case DASD_ECKD_CCW_READ_MT
:
261 case DASD_ECKD_CCW_READ_CKD
:
262 case DASD_ECKD_CCW_READ_CKD_MT
:
263 case DASD_ECKD_CCW_READ_KD
:
264 case DASD_ECKD_CCW_READ_KD_MT
:
265 data
->mask
.perm
= 0x1;
266 data
->attributes
.operation
= private->attrib
.operation
;
268 case DASD_ECKD_CCW_READ_COUNT
:
269 data
->mask
.perm
= 0x1;
270 data
->attributes
.operation
= DASD_BYPASS_CACHE
;
272 case DASD_ECKD_CCW_WRITE
:
273 case DASD_ECKD_CCW_WRITE_MT
:
274 case DASD_ECKD_CCW_WRITE_KD
:
275 case DASD_ECKD_CCW_WRITE_KD_MT
:
276 data
->mask
.perm
= 0x02;
277 data
->attributes
.operation
= private->attrib
.operation
;
278 rc
= check_XRC (ccw
, data
, device
);
280 case DASD_ECKD_CCW_WRITE_CKD
:
281 case DASD_ECKD_CCW_WRITE_CKD_MT
:
282 data
->attributes
.operation
= DASD_BYPASS_CACHE
;
283 rc
= check_XRC (ccw
, data
, device
);
285 case DASD_ECKD_CCW_ERASE
:
286 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS
:
287 case DASD_ECKD_CCW_WRITE_RECORD_ZERO
:
288 data
->mask
.perm
= 0x3;
289 data
->mask
.auth
= 0x1;
290 data
->attributes
.operation
= DASD_BYPASS_CACHE
;
291 rc
= check_XRC (ccw
, data
, device
);
294 dev_err(&device
->cdev
->dev
,
295 "0x%x is not a known command\n", cmd
);
299 data
->attributes
.mode
= 0x3; /* ECKD */
301 if ((private->rdc_data
.cu_type
== 0x2105 ||
302 private->rdc_data
.cu_type
== 0x2107 ||
303 private->rdc_data
.cu_type
== 0x1750)
304 && !(private->uses_cdl
&& trk
< 2))
305 data
->ga_extended
|= 0x40; /* Regular Data Format Mode */
307 heads
= private->rdc_data
.trk_per_cyl
;
308 begcyl
= trk
/ heads
;
309 beghead
= trk
% heads
;
310 endcyl
= totrk
/ heads
;
311 endhead
= totrk
% heads
;
313 /* check for sequential prestage - enhance cylinder range */
314 if (data
->attributes
.operation
== DASD_SEQ_PRESTAGE
||
315 data
->attributes
.operation
== DASD_SEQ_ACCESS
) {
317 if (endcyl
+ private->attrib
.nr_cyl
< private->real_cyl
)
318 endcyl
+= private->attrib
.nr_cyl
;
320 endcyl
= (private->real_cyl
- 1);
323 set_ch_t(&data
->beg_ext
, begcyl
, beghead
);
324 set_ch_t(&data
->end_ext
, endcyl
, endhead
);
328 static int check_XRC_on_prefix(struct PFX_eckd_data
*pfxdata
,
329 struct dasd_device
*device
)
331 struct dasd_eckd_private
*private = device
->private;
334 if (!private->rdc_data
.facilities
.XRC_supported
)
337 /* switch on System Time Stamp - needed for XRC Support */
338 pfxdata
->define_extent
.ga_extended
|= 0x08; /* 'Time Stamp Valid' */
339 pfxdata
->define_extent
.ga_extended
|= 0x02; /* 'Extended Parameter' */
340 pfxdata
->validity
.time_stamp
= 1; /* 'Time Stamp Valid' */
342 rc
= get_sync_clock(&pfxdata
->define_extent
.ep_sys_time
);
343 /* Ignore return code if sync clock is switched off. */
344 if (rc
== -EOPNOTSUPP
|| rc
== -EACCES
)
349 static void fill_LRE_data(struct LRE_eckd_data
*data
, unsigned int trk
,
350 unsigned int rec_on_trk
, int count
, int cmd
,
351 struct dasd_device
*device
, unsigned int reclen
,
354 struct dasd_eckd_private
*private = device
->private;
358 memset(data
, 0, sizeof(*data
));
361 switch (private->rdc_data
.dev_type
) {
363 dn
= ceil_quot(reclen
+ 6, 232);
364 d
= 9 + ceil_quot(reclen
+ 6 * (dn
+ 1), 34);
365 sector
= (49 + (rec_on_trk
- 1) * (10 + d
)) / 8;
368 d
= 7 + ceil_quot(reclen
+ 12, 32);
369 sector
= (39 + (rec_on_trk
- 1) * (8 + d
)) / 7;
373 data
->sector
= sector
;
374 /* note: meaning of count depends on the operation
375 * for record based I/O it's the number of records, but for
376 * track based I/O it's the number of tracks
380 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS
:
381 data
->operation
.orientation
= 0x3;
382 data
->operation
.operation
= 0x03;
384 case DASD_ECKD_CCW_READ_HOME_ADDRESS
:
385 data
->operation
.orientation
= 0x3;
386 data
->operation
.operation
= 0x16;
388 case DASD_ECKD_CCW_WRITE_RECORD_ZERO
:
389 data
->operation
.orientation
= 0x1;
390 data
->operation
.operation
= 0x03;
393 case DASD_ECKD_CCW_READ_RECORD_ZERO
:
394 data
->operation
.orientation
= 0x3;
395 data
->operation
.operation
= 0x16;
398 case DASD_ECKD_CCW_WRITE
:
399 case DASD_ECKD_CCW_WRITE_MT
:
400 case DASD_ECKD_CCW_WRITE_KD
:
401 case DASD_ECKD_CCW_WRITE_KD_MT
:
402 data
->auxiliary
.length_valid
= 0x1;
403 data
->length
= reclen
;
404 data
->operation
.operation
= 0x01;
406 case DASD_ECKD_CCW_WRITE_CKD
:
407 case DASD_ECKD_CCW_WRITE_CKD_MT
:
408 data
->auxiliary
.length_valid
= 0x1;
409 data
->length
= reclen
;
410 data
->operation
.operation
= 0x03;
412 case DASD_ECKD_CCW_WRITE_FULL_TRACK
:
413 data
->operation
.orientation
= 0x0;
414 data
->operation
.operation
= 0x3F;
415 data
->extended_operation
= 0x11;
417 data
->extended_parameter_length
= 0x02;
418 if (data
->count
> 8) {
419 data
->extended_parameter
[0] = 0xFF;
420 data
->extended_parameter
[1] = 0xFF;
421 data
->extended_parameter
[1] <<= (16 - count
);
423 data
->extended_parameter
[0] = 0xFF;
424 data
->extended_parameter
[0] <<= (8 - count
);
425 data
->extended_parameter
[1] = 0x00;
429 case DASD_ECKD_CCW_WRITE_TRACK_DATA
:
430 data
->auxiliary
.length_valid
= 0x1;
431 data
->length
= reclen
; /* not tlf, as one might think */
432 data
->operation
.operation
= 0x3F;
433 data
->extended_operation
= 0x23;
435 case DASD_ECKD_CCW_READ
:
436 case DASD_ECKD_CCW_READ_MT
:
437 case DASD_ECKD_CCW_READ_KD
:
438 case DASD_ECKD_CCW_READ_KD_MT
:
439 data
->auxiliary
.length_valid
= 0x1;
440 data
->length
= reclen
;
441 data
->operation
.operation
= 0x06;
443 case DASD_ECKD_CCW_READ_CKD
:
444 case DASD_ECKD_CCW_READ_CKD_MT
:
445 data
->auxiliary
.length_valid
= 0x1;
446 data
->length
= reclen
;
447 data
->operation
.operation
= 0x16;
449 case DASD_ECKD_CCW_READ_COUNT
:
450 data
->operation
.operation
= 0x06;
452 case DASD_ECKD_CCW_READ_TRACK
:
453 data
->operation
.orientation
= 0x1;
454 data
->operation
.operation
= 0x0C;
455 data
->extended_parameter_length
= 0;
458 case DASD_ECKD_CCW_READ_TRACK_DATA
:
459 data
->auxiliary
.length_valid
= 0x1;
461 data
->operation
.operation
= 0x0C;
463 case DASD_ECKD_CCW_ERASE
:
464 data
->length
= reclen
;
465 data
->auxiliary
.length_valid
= 0x1;
466 data
->operation
.operation
= 0x0b;
469 DBF_DEV_EVENT(DBF_ERR
, device
,
470 "fill LRE unknown opcode 0x%x", cmd
);
473 set_ch_t(&data
->seek_addr
,
474 trk
/ private->rdc_data
.trk_per_cyl
,
475 trk
% private->rdc_data
.trk_per_cyl
);
476 data
->search_arg
.cyl
= data
->seek_addr
.cyl
;
477 data
->search_arg
.head
= data
->seek_addr
.head
;
478 data
->search_arg
.record
= rec_on_trk
;
481 static int prefix_LRE(struct ccw1
*ccw
, struct PFX_eckd_data
*pfxdata
,
482 unsigned int trk
, unsigned int totrk
, int cmd
,
483 struct dasd_device
*basedev
, struct dasd_device
*startdev
,
484 unsigned char format
, unsigned int rec_on_trk
, int count
,
485 unsigned int blksize
, unsigned int tlf
)
487 struct dasd_eckd_private
*basepriv
, *startpriv
;
488 struct DE_eckd_data
*dedata
;
489 struct LRE_eckd_data
*lredata
;
491 u16 heads
, beghead
, endhead
;
494 basepriv
= basedev
->private;
495 startpriv
= startdev
->private;
496 dedata
= &pfxdata
->define_extent
;
497 lredata
= &pfxdata
->locate_record
;
499 ccw
->cmd_code
= DASD_ECKD_CCW_PFX
;
501 if (cmd
== DASD_ECKD_CCW_WRITE_FULL_TRACK
) {
502 ccw
->count
= sizeof(*pfxdata
) + 2;
503 ccw
->cda
= (__u32
) __pa(pfxdata
);
504 memset(pfxdata
, 0, sizeof(*pfxdata
) + 2);
506 ccw
->count
= sizeof(*pfxdata
);
507 ccw
->cda
= (__u32
) __pa(pfxdata
);
508 memset(pfxdata
, 0, sizeof(*pfxdata
));
513 DBF_DEV_EVENT(DBF_ERR
, basedev
,
514 "PFX LRE unknown format 0x%x", format
);
518 pfxdata
->format
= format
;
519 pfxdata
->base_address
= basepriv
->ned
->unit_addr
;
520 pfxdata
->base_lss
= basepriv
->ned
->ID
;
521 pfxdata
->validity
.define_extent
= 1;
523 /* private uid is kept up to date, conf_data may be outdated */
524 if (startpriv
->uid
.type
!= UA_BASE_DEVICE
) {
525 pfxdata
->validity
.verify_base
= 1;
526 if (startpriv
->uid
.type
== UA_HYPER_PAV_ALIAS
)
527 pfxdata
->validity
.hyper_pav
= 1;
530 /* define extend data (mostly)*/
532 case DASD_ECKD_CCW_READ_HOME_ADDRESS
:
533 case DASD_ECKD_CCW_READ_RECORD_ZERO
:
534 case DASD_ECKD_CCW_READ
:
535 case DASD_ECKD_CCW_READ_MT
:
536 case DASD_ECKD_CCW_READ_CKD
:
537 case DASD_ECKD_CCW_READ_CKD_MT
:
538 case DASD_ECKD_CCW_READ_KD
:
539 case DASD_ECKD_CCW_READ_KD_MT
:
540 dedata
->mask
.perm
= 0x1;
541 dedata
->attributes
.operation
= basepriv
->attrib
.operation
;
543 case DASD_ECKD_CCW_READ_COUNT
:
544 dedata
->mask
.perm
= 0x1;
545 dedata
->attributes
.operation
= DASD_BYPASS_CACHE
;
547 case DASD_ECKD_CCW_READ_TRACK
:
548 case DASD_ECKD_CCW_READ_TRACK_DATA
:
549 dedata
->mask
.perm
= 0x1;
550 dedata
->attributes
.operation
= basepriv
->attrib
.operation
;
551 dedata
->blk_size
= 0;
553 case DASD_ECKD_CCW_WRITE
:
554 case DASD_ECKD_CCW_WRITE_MT
:
555 case DASD_ECKD_CCW_WRITE_KD
:
556 case DASD_ECKD_CCW_WRITE_KD_MT
:
557 dedata
->mask
.perm
= 0x02;
558 dedata
->attributes
.operation
= basepriv
->attrib
.operation
;
559 rc
= check_XRC_on_prefix(pfxdata
, basedev
);
561 case DASD_ECKD_CCW_WRITE_CKD
:
562 case DASD_ECKD_CCW_WRITE_CKD_MT
:
563 dedata
->attributes
.operation
= DASD_BYPASS_CACHE
;
564 rc
= check_XRC_on_prefix(pfxdata
, basedev
);
566 case DASD_ECKD_CCW_ERASE
:
567 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS
:
568 case DASD_ECKD_CCW_WRITE_RECORD_ZERO
:
569 dedata
->mask
.perm
= 0x3;
570 dedata
->mask
.auth
= 0x1;
571 dedata
->attributes
.operation
= DASD_BYPASS_CACHE
;
572 rc
= check_XRC_on_prefix(pfxdata
, basedev
);
574 case DASD_ECKD_CCW_WRITE_FULL_TRACK
:
575 dedata
->mask
.perm
= 0x03;
576 dedata
->attributes
.operation
= basepriv
->attrib
.operation
;
577 dedata
->blk_size
= 0;
579 case DASD_ECKD_CCW_WRITE_TRACK_DATA
:
580 dedata
->mask
.perm
= 0x02;
581 dedata
->attributes
.operation
= basepriv
->attrib
.operation
;
582 dedata
->blk_size
= blksize
;
583 rc
= check_XRC_on_prefix(pfxdata
, basedev
);
586 DBF_DEV_EVENT(DBF_ERR
, basedev
,
587 "PFX LRE unknown opcode 0x%x", cmd
);
592 dedata
->attributes
.mode
= 0x3; /* ECKD */
594 if ((basepriv
->rdc_data
.cu_type
== 0x2105 ||
595 basepriv
->rdc_data
.cu_type
== 0x2107 ||
596 basepriv
->rdc_data
.cu_type
== 0x1750)
597 && !(basepriv
->uses_cdl
&& trk
< 2))
598 dedata
->ga_extended
|= 0x40; /* Regular Data Format Mode */
600 heads
= basepriv
->rdc_data
.trk_per_cyl
;
601 begcyl
= trk
/ heads
;
602 beghead
= trk
% heads
;
603 endcyl
= totrk
/ heads
;
604 endhead
= totrk
% heads
;
606 /* check for sequential prestage - enhance cylinder range */
607 if (dedata
->attributes
.operation
== DASD_SEQ_PRESTAGE
||
608 dedata
->attributes
.operation
== DASD_SEQ_ACCESS
) {
610 if (endcyl
+ basepriv
->attrib
.nr_cyl
< basepriv
->real_cyl
)
611 endcyl
+= basepriv
->attrib
.nr_cyl
;
613 endcyl
= (basepriv
->real_cyl
- 1);
616 set_ch_t(&dedata
->beg_ext
, begcyl
, beghead
);
617 set_ch_t(&dedata
->end_ext
, endcyl
, endhead
);
620 fill_LRE_data(lredata
, trk
, rec_on_trk
, count
, cmd
,
621 basedev
, blksize
, tlf
);
627 static int prefix(struct ccw1
*ccw
, struct PFX_eckd_data
*pfxdata
,
628 unsigned int trk
, unsigned int totrk
, int cmd
,
629 struct dasd_device
*basedev
, struct dasd_device
*startdev
)
631 return prefix_LRE(ccw
, pfxdata
, trk
, totrk
, cmd
, basedev
, startdev
,
636 locate_record(struct ccw1
*ccw
, struct LO_eckd_data
*data
, unsigned int trk
,
637 unsigned int rec_on_trk
, int no_rec
, int cmd
,
638 struct dasd_device
* device
, int reclen
)
640 struct dasd_eckd_private
*private = device
->private;
644 DBF_DEV_EVENT(DBF_INFO
, device
,
645 "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d",
646 trk
, rec_on_trk
, no_rec
, cmd
, reclen
);
648 ccw
->cmd_code
= DASD_ECKD_CCW_LOCATE_RECORD
;
651 ccw
->cda
= (__u32
) __pa(data
);
653 memset(data
, 0, sizeof(struct LO_eckd_data
));
656 switch (private->rdc_data
.dev_type
) {
658 dn
= ceil_quot(reclen
+ 6, 232);
659 d
= 9 + ceil_quot(reclen
+ 6 * (dn
+ 1), 34);
660 sector
= (49 + (rec_on_trk
- 1) * (10 + d
)) / 8;
663 d
= 7 + ceil_quot(reclen
+ 12, 32);
664 sector
= (39 + (rec_on_trk
- 1) * (8 + d
)) / 7;
668 data
->sector
= sector
;
669 data
->count
= no_rec
;
671 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS
:
672 data
->operation
.orientation
= 0x3;
673 data
->operation
.operation
= 0x03;
675 case DASD_ECKD_CCW_READ_HOME_ADDRESS
:
676 data
->operation
.orientation
= 0x3;
677 data
->operation
.operation
= 0x16;
679 case DASD_ECKD_CCW_WRITE_RECORD_ZERO
:
680 data
->operation
.orientation
= 0x1;
681 data
->operation
.operation
= 0x03;
684 case DASD_ECKD_CCW_READ_RECORD_ZERO
:
685 data
->operation
.orientation
= 0x3;
686 data
->operation
.operation
= 0x16;
689 case DASD_ECKD_CCW_WRITE
:
690 case DASD_ECKD_CCW_WRITE_MT
:
691 case DASD_ECKD_CCW_WRITE_KD
:
692 case DASD_ECKD_CCW_WRITE_KD_MT
:
693 data
->auxiliary
.last_bytes_used
= 0x1;
694 data
->length
= reclen
;
695 data
->operation
.operation
= 0x01;
697 case DASD_ECKD_CCW_WRITE_CKD
:
698 case DASD_ECKD_CCW_WRITE_CKD_MT
:
699 data
->auxiliary
.last_bytes_used
= 0x1;
700 data
->length
= reclen
;
701 data
->operation
.operation
= 0x03;
703 case DASD_ECKD_CCW_READ
:
704 case DASD_ECKD_CCW_READ_MT
:
705 case DASD_ECKD_CCW_READ_KD
:
706 case DASD_ECKD_CCW_READ_KD_MT
:
707 data
->auxiliary
.last_bytes_used
= 0x1;
708 data
->length
= reclen
;
709 data
->operation
.operation
= 0x06;
711 case DASD_ECKD_CCW_READ_CKD
:
712 case DASD_ECKD_CCW_READ_CKD_MT
:
713 data
->auxiliary
.last_bytes_used
= 0x1;
714 data
->length
= reclen
;
715 data
->operation
.operation
= 0x16;
717 case DASD_ECKD_CCW_READ_COUNT
:
718 data
->operation
.operation
= 0x06;
720 case DASD_ECKD_CCW_ERASE
:
721 data
->length
= reclen
;
722 data
->auxiliary
.last_bytes_used
= 0x1;
723 data
->operation
.operation
= 0x0b;
726 DBF_DEV_EVENT(DBF_ERR
, device
, "unknown locate record "
729 set_ch_t(&data
->seek_addr
,
730 trk
/ private->rdc_data
.trk_per_cyl
,
731 trk
% private->rdc_data
.trk_per_cyl
);
732 data
->search_arg
.cyl
= data
->seek_addr
.cyl
;
733 data
->search_arg
.head
= data
->seek_addr
.head
;
734 data
->search_arg
.record
= rec_on_trk
;
738 * Returns 1 if the block is one of the special blocks that needs
739 * to get read/written with the KD variant of the command.
740 * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and
741 * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT.
742 * Luckily the KD variants differ only by one bit (0x08) from the
743 * normal variant. So don't wonder about code like:
744 * if (dasd_eckd_cdl_special(blk_per_trk, recid))
745 * ccw->cmd_code |= 0x8;
748 dasd_eckd_cdl_special(int blk_per_trk
, int recid
)
752 if (recid
< blk_per_trk
)
754 if (recid
< 2 * blk_per_trk
)
760 * Returns the record size for the special blocks of the cdl format.
761 * Only returns something useful if dasd_eckd_cdl_special is true
765 dasd_eckd_cdl_reclen(int recid
)
768 return sizes_trk0
[recid
];
771 /* create unique id from private structure. */
772 static void create_uid(struct dasd_eckd_private
*private)
775 struct dasd_uid
*uid
;
778 memset(uid
, 0, sizeof(struct dasd_uid
));
779 memcpy(uid
->vendor
, private->ned
->HDA_manufacturer
,
780 sizeof(uid
->vendor
) - 1);
781 EBCASC(uid
->vendor
, sizeof(uid
->vendor
) - 1);
782 memcpy(uid
->serial
, private->ned
->HDA_location
,
783 sizeof(uid
->serial
) - 1);
784 EBCASC(uid
->serial
, sizeof(uid
->serial
) - 1);
785 uid
->ssid
= private->gneq
->subsystemID
;
786 uid
->real_unit_addr
= private->ned
->unit_addr
;
788 uid
->type
= private->sneq
->sua_flags
;
789 if (uid
->type
== UA_BASE_PAV_ALIAS
)
790 uid
->base_unit_addr
= private->sneq
->base_unit_addr
;
792 uid
->type
= UA_BASE_DEVICE
;
794 if (private->vdsneq
) {
795 for (count
= 0; count
< 16; count
++) {
796 sprintf(uid
->vduit
+2*count
, "%02x",
797 private->vdsneq
->uit
[count
]);
803 * Generate device unique id that specifies the physical device.
805 static int dasd_eckd_generate_uid(struct dasd_device
*device
)
807 struct dasd_eckd_private
*private = device
->private;
812 if (!private->ned
|| !private->gneq
)
814 spin_lock_irqsave(get_ccwdev_lock(device
->cdev
), flags
);
816 spin_unlock_irqrestore(get_ccwdev_lock(device
->cdev
), flags
);
820 static int dasd_eckd_get_uid(struct dasd_device
*device
, struct dasd_uid
*uid
)
822 struct dasd_eckd_private
*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 = device
->private;
1042 private->conf_data
= NULL
;
1043 private->conf_len
= 0;
1044 for (i
= 0; i
< 8; i
++) {
1045 kfree(private->path_conf_data
[i
]);
1046 private->path_conf_data
[i
] = NULL
;
1051 static int dasd_eckd_read_conf(struct dasd_device
*device
)
1054 int conf_len
, conf_data_saved
;
1055 int rc
, path_err
, pos
;
1057 struct dasd_eckd_private
*private, path_private
;
1058 struct dasd_path
*path_data
;
1059 struct dasd_uid
*uid
;
1060 char print_path_uid
[60], print_device_uid
[60];
1062 private = device
->private;
1063 path_data
= &device
->path_data
;
1064 opm
= ccw_device_get_path_mask(device
->cdev
);
1065 conf_data_saved
= 0;
1067 /* get configuration data per operational path */
1068 for (lpm
= 0x80; lpm
; lpm
>>= 1) {
1071 rc
= dasd_eckd_read_conf_lpm(device
, &conf_data
,
1073 if (rc
&& rc
!= -EOPNOTSUPP
) { /* -EOPNOTSUPP is ok */
1074 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
,
1075 "Read configuration data returned "
1079 if (conf_data
== NULL
) {
1080 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
, "%s",
1081 "No configuration data "
1083 /* no further analysis possible */
1084 path_data
->opm
|= lpm
;
1085 continue; /* no error */
1087 /* save first valid configuration data */
1088 if (!conf_data_saved
) {
1089 /* initially clear previously stored conf_data */
1090 dasd_eckd_clear_conf_data(device
);
1091 private->conf_data
= conf_data
;
1092 private->conf_len
= conf_len
;
1093 if (dasd_eckd_identify_conf_parts(private)) {
1094 private->conf_data
= NULL
;
1095 private->conf_len
= 0;
1099 pos
= pathmask_to_pos(lpm
);
1100 /* store per path conf_data */
1101 private->path_conf_data
[pos
] =
1102 (struct dasd_conf_data
*) conf_data
;
1104 * build device UID that other path data
1105 * can be compared to it
1107 dasd_eckd_generate_uid(device
);
1110 path_private
.conf_data
= conf_data
;
1111 path_private
.conf_len
= DASD_ECKD_RCD_DATA_SIZE
;
1112 if (dasd_eckd_identify_conf_parts(
1114 path_private
.conf_data
= NULL
;
1115 path_private
.conf_len
= 0;
1119 if (dasd_eckd_compare_path_uid(
1120 device
, &path_private
)) {
1121 uid
= &path_private
.uid
;
1122 if (strlen(uid
->vduit
) > 0)
1123 snprintf(print_path_uid
,
1124 sizeof(print_path_uid
),
1125 "%s.%s.%04x.%02x.%s",
1126 uid
->vendor
, uid
->serial
,
1127 uid
->ssid
, uid
->real_unit_addr
,
1130 snprintf(print_path_uid
,
1131 sizeof(print_path_uid
),
1133 uid
->vendor
, uid
->serial
,
1135 uid
->real_unit_addr
);
1136 uid
= &private->uid
;
1137 if (strlen(uid
->vduit
) > 0)
1138 snprintf(print_device_uid
,
1139 sizeof(print_device_uid
),
1140 "%s.%s.%04x.%02x.%s",
1141 uid
->vendor
, uid
->serial
,
1142 uid
->ssid
, uid
->real_unit_addr
,
1145 snprintf(print_device_uid
,
1146 sizeof(print_device_uid
),
1148 uid
->vendor
, uid
->serial
,
1150 uid
->real_unit_addr
);
1151 dev_err(&device
->cdev
->dev
,
1152 "Not all channel paths lead to "
1153 "the same device, path %02X leads to "
1154 "device %s instead of %s\n", lpm
,
1155 print_path_uid
, print_device_uid
);
1157 path_data
->cablepm
|= lpm
;
1160 pos
= pathmask_to_pos(lpm
);
1161 /* store per path conf_data */
1162 private->path_conf_data
[pos
] =
1163 (struct dasd_conf_data
*) conf_data
;
1164 path_private
.conf_data
= NULL
;
1165 path_private
.conf_len
= 0;
1167 switch (dasd_eckd_path_access(conf_data
, conf_len
)) {
1169 path_data
->npm
|= lpm
;
1172 path_data
->ppm
|= lpm
;
1175 if (!path_data
->opm
) {
1176 path_data
->opm
= lpm
;
1177 dasd_generic_path_operational(device
);
1179 path_data
->opm
|= lpm
;
1182 * if the path is used
1183 * it should not be in one of the negative lists
1185 path_data
->cablepm
&= ~lpm
;
1186 path_data
->hpfpm
&= ~lpm
;
1187 path_data
->cuirpm
&= ~lpm
;
1193 static int verify_fcx_max_data(struct dasd_device
*device
, __u8 lpm
)
1195 struct dasd_eckd_private
*private = device
->private;
1199 if (private->fcx_max_data
) {
1200 mdc
= ccw_device_get_mdc(device
->cdev
, lpm
);
1202 dev_warn(&device
->cdev
->dev
,
1203 "Detecting the maximum data size for zHPF "
1204 "requests failed (rc=%d) for a new path %x\n",
1208 fcx_max_data
= mdc
* FCX_MAX_DATA_FACTOR
;
1209 if (fcx_max_data
< private->fcx_max_data
) {
1210 dev_warn(&device
->cdev
->dev
,
1211 "The maximum data size for zHPF requests %u "
1212 "on a new path %x is below the active maximum "
1213 "%u\n", fcx_max_data
, lpm
,
1214 private->fcx_max_data
);
1221 static int rebuild_device_uid(struct dasd_device
*device
,
1222 struct path_verification_work_data
*data
)
1224 struct dasd_eckd_private
*private = device
->private;
1225 struct dasd_path
*path_data
= &device
->path_data
;
1226 __u8 lpm
, opm
= path_data
->opm
;
1229 for (lpm
= 0x80; lpm
; lpm
>>= 1) {
1232 memset(&data
->rcd_buffer
, 0, sizeof(data
->rcd_buffer
));
1233 memset(&data
->cqr
, 0, sizeof(data
->cqr
));
1234 data
->cqr
.cpaddr
= &data
->ccw
;
1235 rc
= dasd_eckd_read_conf_immediately(device
, &data
->cqr
,
1240 if (rc
== -EOPNOTSUPP
) /* -EOPNOTSUPP is ok */
1242 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
,
1243 "Read configuration data "
1244 "returned error %d", rc
);
1247 memcpy(private->conf_data
, data
->rcd_buffer
,
1248 DASD_ECKD_RCD_DATA_SIZE
);
1249 if (dasd_eckd_identify_conf_parts(private)) {
1251 } else /* first valid path is enough */
1256 rc
= dasd_eckd_generate_uid(device
);
1261 static void do_path_verification_work(struct work_struct
*work
)
1263 struct path_verification_work_data
*data
;
1264 struct dasd_device
*device
;
1265 struct dasd_eckd_private path_private
;
1266 struct dasd_uid
*uid
;
1267 __u8 path_rcd_buf
[DASD_ECKD_RCD_DATA_SIZE
];
1268 __u8 lpm
, opm
, npm
, ppm
, epm
, hpfpm
, cablepm
;
1269 unsigned long flags
;
1273 data
= container_of(work
, struct path_verification_work_data
, worker
);
1274 device
= data
->device
;
1276 /* delay path verification until device was resumed */
1277 if (test_bit(DASD_FLAG_SUSPENDED
, &device
->flags
)) {
1278 schedule_work(work
);
1281 /* check if path verification already running and delay if so */
1282 if (test_and_set_bit(DASD_FLAG_PATH_VERIFY
, &device
->flags
)) {
1283 schedule_work(work
);
1293 for (lpm
= 0x80; lpm
; lpm
>>= 1) {
1294 if (!(lpm
& data
->tbvpm
))
1296 memset(&data
->rcd_buffer
, 0, sizeof(data
->rcd_buffer
));
1297 memset(&data
->cqr
, 0, sizeof(data
->cqr
));
1298 data
->cqr
.cpaddr
= &data
->ccw
;
1299 rc
= dasd_eckd_read_conf_immediately(device
, &data
->cqr
,
1303 switch (dasd_eckd_path_access(data
->rcd_buffer
,
1304 DASD_ECKD_RCD_DATA_SIZE
)
1314 } else if (rc
== -EOPNOTSUPP
) {
1315 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
, "%s",
1316 "path verification: No configuration "
1319 } else if (rc
== -EAGAIN
) {
1320 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
, "%s",
1321 "path verification: device is stopped,"
1322 " try again later");
1325 dev_warn(&device
->cdev
->dev
,
1326 "Reading device feature codes failed "
1327 "(rc=%d) for new path %x\n", rc
, lpm
);
1330 if (verify_fcx_max_data(device
, lpm
)) {
1339 * save conf_data for comparison after
1340 * rebuild_device_uid may have changed
1343 memcpy(&path_rcd_buf
, data
->rcd_buffer
,
1344 DASD_ECKD_RCD_DATA_SIZE
);
1345 path_private
.conf_data
= (void *) &path_rcd_buf
;
1346 path_private
.conf_len
= DASD_ECKD_RCD_DATA_SIZE
;
1347 if (dasd_eckd_identify_conf_parts(&path_private
)) {
1348 path_private
.conf_data
= NULL
;
1349 path_private
.conf_len
= 0;
1354 * compare path UID with device UID only if at least
1355 * one valid path is left
1356 * in other case the device UID may have changed and
1357 * the first working path UID will be used as device UID
1359 if (device
->path_data
.opm
&&
1360 dasd_eckd_compare_path_uid(device
, &path_private
)) {
1362 * the comparison was not successful
1363 * rebuild the device UID with at least one
1364 * known path in case a z/VM hyperswap command
1365 * has changed the device
1367 * after this compare again
1369 * if either the rebuild or the recompare fails
1370 * the path can not be used
1372 if (rebuild_device_uid(device
, data
) ||
1373 dasd_eckd_compare_path_uid(
1374 device
, &path_private
)) {
1375 uid
= &path_private
.uid
;
1376 if (strlen(uid
->vduit
) > 0)
1377 snprintf(print_uid
, sizeof(print_uid
),
1378 "%s.%s.%04x.%02x.%s",
1379 uid
->vendor
, uid
->serial
,
1380 uid
->ssid
, uid
->real_unit_addr
,
1383 snprintf(print_uid
, sizeof(print_uid
),
1385 uid
->vendor
, uid
->serial
,
1387 uid
->real_unit_addr
);
1388 dev_err(&device
->cdev
->dev
,
1389 "The newly added channel path %02X "
1390 "will not be used because it leads "
1391 "to a different device %s\n",
1402 * There is a small chance that a path is lost again between
1403 * above path verification and the following modification of
1404 * the device opm mask. We could avoid that race here by using
1405 * yet another path mask, but we rather deal with this unlikely
1406 * situation in dasd_start_IO.
1408 spin_lock_irqsave(get_ccwdev_lock(device
->cdev
), flags
);
1409 if (!device
->path_data
.opm
&& opm
) {
1410 device
->path_data
.opm
= opm
;
1411 device
->path_data
.cablepm
&= ~opm
;
1412 device
->path_data
.cuirpm
&= ~opm
;
1413 device
->path_data
.hpfpm
&= ~opm
;
1414 dasd_generic_path_operational(device
);
1416 device
->path_data
.opm
|= opm
;
1417 device
->path_data
.cablepm
&= ~opm
;
1418 device
->path_data
.cuirpm
&= ~opm
;
1419 device
->path_data
.hpfpm
&= ~opm
;
1421 device
->path_data
.npm
|= npm
;
1422 device
->path_data
.ppm
|= ppm
;
1423 device
->path_data
.tbvpm
|= epm
;
1424 device
->path_data
.cablepm
|= cablepm
;
1425 device
->path_data
.hpfpm
|= hpfpm
;
1426 spin_unlock_irqrestore(get_ccwdev_lock(device
->cdev
), flags
);
1428 clear_bit(DASD_FLAG_PATH_VERIFY
, &device
->flags
);
1429 dasd_put_device(device
);
1431 mutex_unlock(&dasd_path_verification_mutex
);
1436 static int dasd_eckd_verify_path(struct dasd_device
*device
, __u8 lpm
)
1438 struct path_verification_work_data
*data
;
1440 data
= kmalloc(sizeof(*data
), GFP_ATOMIC
| GFP_DMA
);
1442 if (mutex_trylock(&dasd_path_verification_mutex
)) {
1443 data
= path_verification_worker
;
1448 memset(data
, 0, sizeof(*data
));
1451 INIT_WORK(&data
->worker
, do_path_verification_work
);
1452 dasd_get_device(device
);
1453 data
->device
= device
;
1455 schedule_work(&data
->worker
);
1459 static int dasd_eckd_read_features(struct dasd_device
*device
)
1461 struct dasd_eckd_private
*private = device
->private;
1462 struct dasd_psf_prssd_data
*prssdp
;
1463 struct dasd_rssd_features
*features
;
1464 struct dasd_ccw_req
*cqr
;
1468 memset(&private->features
, 0, sizeof(struct dasd_rssd_features
));
1469 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1 /* PSF */ + 1 /* RSSD */,
1470 (sizeof(struct dasd_psf_prssd_data
) +
1471 sizeof(struct dasd_rssd_features
)),
1474 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
, "%s", "Could not "
1475 "allocate initialization request");
1476 return PTR_ERR(cqr
);
1478 cqr
->startdev
= device
;
1479 cqr
->memdev
= device
;
1482 cqr
->expires
= 10 * HZ
;
1484 /* Prepare for Read Subsystem Data */
1485 prssdp
= (struct dasd_psf_prssd_data
*) cqr
->data
;
1486 memset(prssdp
, 0, sizeof(struct dasd_psf_prssd_data
));
1487 prssdp
->order
= PSF_ORDER_PRSSD
;
1488 prssdp
->suborder
= 0x41; /* Read Feature Codes */
1489 /* all other bytes of prssdp must be zero */
1492 ccw
->cmd_code
= DASD_ECKD_CCW_PSF
;
1493 ccw
->count
= sizeof(struct dasd_psf_prssd_data
);
1494 ccw
->flags
|= CCW_FLAG_CC
;
1495 ccw
->cda
= (__u32
)(addr_t
) prssdp
;
1497 /* Read Subsystem Data - feature codes */
1498 features
= (struct dasd_rssd_features
*) (prssdp
+ 1);
1499 memset(features
, 0, sizeof(struct dasd_rssd_features
));
1502 ccw
->cmd_code
= DASD_ECKD_CCW_RSSD
;
1503 ccw
->count
= sizeof(struct dasd_rssd_features
);
1504 ccw
->cda
= (__u32
)(addr_t
) features
;
1506 cqr
->buildclk
= get_tod_clock();
1507 cqr
->status
= DASD_CQR_FILLED
;
1508 rc
= dasd_sleep_on(cqr
);
1510 prssdp
= (struct dasd_psf_prssd_data
*) cqr
->data
;
1511 features
= (struct dasd_rssd_features
*) (prssdp
+ 1);
1512 memcpy(&private->features
, features
,
1513 sizeof(struct dasd_rssd_features
));
1515 dev_warn(&device
->cdev
->dev
, "Reading device feature codes"
1516 " failed with rc=%d\n", rc
);
1517 dasd_sfree_request(cqr
, cqr
->memdev
);
1523 * Build CP for Perform Subsystem Function - SSC.
1525 static struct dasd_ccw_req
*dasd_eckd_build_psf_ssc(struct dasd_device
*device
,
1528 struct dasd_ccw_req
*cqr
;
1529 struct dasd_psf_ssc_data
*psf_ssc_data
;
1532 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1 /* PSF */ ,
1533 sizeof(struct dasd_psf_ssc_data
),
1537 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
1538 "Could not allocate PSF-SSC request");
1541 psf_ssc_data
= (struct dasd_psf_ssc_data
*)cqr
->data
;
1542 psf_ssc_data
->order
= PSF_ORDER_SSC
;
1543 psf_ssc_data
->suborder
= 0xc0;
1545 psf_ssc_data
->suborder
|= 0x08;
1546 psf_ssc_data
->reserved
[0] = 0x88;
1549 ccw
->cmd_code
= DASD_ECKD_CCW_PSF
;
1550 ccw
->cda
= (__u32
)(addr_t
)psf_ssc_data
;
1553 cqr
->startdev
= device
;
1554 cqr
->memdev
= device
;
1557 cqr
->expires
= 10*HZ
;
1558 cqr
->buildclk
= get_tod_clock();
1559 cqr
->status
= DASD_CQR_FILLED
;
1564 * Perform Subsystem Function.
1565 * It is necessary to trigger CIO for channel revalidation since this
1566 * call might change behaviour of DASD devices.
1569 dasd_eckd_psf_ssc(struct dasd_device
*device
, int enable_pav
,
1570 unsigned long flags
)
1572 struct dasd_ccw_req
*cqr
;
1575 cqr
= dasd_eckd_build_psf_ssc(device
, enable_pav
);
1577 return PTR_ERR(cqr
);
1580 * set flags e.g. turn on failfast, to prevent blocking
1581 * the calling function should handle failed requests
1583 cqr
->flags
|= flags
;
1585 rc
= dasd_sleep_on(cqr
);
1587 /* trigger CIO to reprobe devices */
1588 css_schedule_reprobe();
1589 else if (cqr
->intrc
== -EAGAIN
)
1592 dasd_sfree_request(cqr
, cqr
->memdev
);
1597 * Valide storage server of current device.
1599 static int dasd_eckd_validate_server(struct dasd_device
*device
,
1600 unsigned long flags
)
1602 struct dasd_eckd_private
*private = device
->private;
1605 if (private->uid
.type
== UA_BASE_PAV_ALIAS
||
1606 private->uid
.type
== UA_HYPER_PAV_ALIAS
)
1608 if (dasd_nopav
|| MACHINE_IS_VM
)
1612 rc
= dasd_eckd_psf_ssc(device
, enable_pav
, flags
);
1614 /* may be requested feature is not available on server,
1615 * therefore just report error and go ahead */
1616 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
, "PSF-SSC for SSID %04x "
1617 "returned rc=%d", private->uid
.ssid
, rc
);
1622 * worker to do a validate server in case of a lost pathgroup
1624 static void dasd_eckd_do_validate_server(struct work_struct
*work
)
1626 struct dasd_device
*device
= container_of(work
, struct dasd_device
,
1628 unsigned long flags
= 0;
1630 set_bit(DASD_CQR_FLAGS_FAILFAST
, &flags
);
1631 if (dasd_eckd_validate_server(device
, flags
)
1633 /* schedule worker again if failed */
1634 schedule_work(&device
->kick_validate
);
1638 dasd_put_device(device
);
1641 static void dasd_eckd_kick_validate_server(struct dasd_device
*device
)
1643 dasd_get_device(device
);
1644 /* exit if device not online or in offline processing */
1645 if (test_bit(DASD_FLAG_OFFLINE
, &device
->flags
) ||
1646 device
->state
< DASD_STATE_ONLINE
) {
1647 dasd_put_device(device
);
1650 /* queue call to do_validate_server to the kernel event daemon. */
1651 if (!schedule_work(&device
->kick_validate
))
1652 dasd_put_device(device
);
1655 static u32
get_fcx_max_data(struct dasd_device
*device
)
1657 struct dasd_eckd_private
*private = device
->private;
1658 int fcx_in_css
, fcx_in_gneq
, fcx_in_features
;
1663 /* is transport mode supported? */
1664 fcx_in_css
= css_general_characteristics
.fcx
;
1665 fcx_in_gneq
= private->gneq
->reserved2
[7] & 0x04;
1666 fcx_in_features
= private->features
.feature
[40] & 0x80;
1667 tpm
= fcx_in_css
&& fcx_in_gneq
&& fcx_in_features
;
1672 mdc
= ccw_device_get_mdc(device
->cdev
, 0);
1674 dev_warn(&device
->cdev
->dev
, "Detecting the maximum supported"
1675 " data size for zHPF requests failed\n");
1678 return mdc
* FCX_MAX_DATA_FACTOR
;
1682 * Check device characteristics.
1683 * If the device is accessible using ECKD discipline, the device is enabled.
1686 dasd_eckd_check_characteristics(struct dasd_device
*device
)
1688 struct dasd_eckd_private
*private = device
->private;
1689 struct dasd_block
*block
;
1690 struct dasd_uid temp_uid
;
1693 unsigned long value
;
1695 /* setup work queue for validate server*/
1696 INIT_WORK(&device
->kick_validate
, dasd_eckd_do_validate_server
);
1697 /* setup work queue for summary unit check */
1698 INIT_WORK(&device
->suc_work
, dasd_alias_handle_summary_unit_check
);
1700 if (!ccw_device_is_pathgroup(device
->cdev
)) {
1701 dev_warn(&device
->cdev
->dev
,
1702 "A channel path group could not be established\n");
1705 if (!ccw_device_is_multipath(device
->cdev
)) {
1706 dev_info(&device
->cdev
->dev
,
1707 "The DASD is not operating in multipath mode\n");
1710 private = kzalloc(sizeof(*private), GFP_KERNEL
| GFP_DMA
);
1712 dev_warn(&device
->cdev
->dev
,
1713 "Allocating memory for private DASD data "
1717 device
->private = private;
1719 memset(private, 0, sizeof(*private));
1721 /* Invalidate status of initial analysis. */
1722 private->init_cqr_status
= -1;
1723 /* Set default cache operations. */
1724 private->attrib
.operation
= DASD_NORMAL_CACHE
;
1725 private->attrib
.nr_cyl
= 0;
1727 /* Read Configuration Data */
1728 rc
= dasd_eckd_read_conf(device
);
1732 /* set default timeout */
1733 device
->default_expires
= DASD_EXPIRES
;
1734 /* set default retry count */
1735 device
->default_retries
= DASD_RETRIES
;
1737 if (private->gneq
) {
1739 for (i
= 0; i
< private->gneq
->timeout
.value
; i
++)
1741 value
= value
* private->gneq
->timeout
.number
;
1742 /* do not accept useless values */
1743 if (value
!= 0 && value
<= DASD_EXPIRES_MAX
)
1744 device
->default_expires
= value
;
1747 dasd_eckd_get_uid(device
, &temp_uid
);
1748 if (temp_uid
.type
== UA_BASE_DEVICE
) {
1749 block
= dasd_alloc_block();
1750 if (IS_ERR(block
)) {
1751 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
, "%s",
1752 "could not allocate dasd "
1754 rc
= PTR_ERR(block
);
1757 device
->block
= block
;
1758 block
->base
= device
;
1761 /* register lcu with alias handling, enable PAV */
1762 rc
= dasd_alias_make_device_known_to_lcu(device
);
1766 dasd_eckd_validate_server(device
, 0);
1768 /* device may report different configuration data after LCU setup */
1769 rc
= dasd_eckd_read_conf(device
);
1773 /* Read Feature Codes */
1774 dasd_eckd_read_features(device
);
1776 /* Read Device Characteristics */
1777 rc
= dasd_generic_read_dev_chars(device
, DASD_ECKD_MAGIC
,
1778 &private->rdc_data
, 64);
1780 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
,
1781 "Read device characteristic failed, rc=%d", rc
);
1785 if ((device
->features
& DASD_FEATURE_USERAW
) &&
1786 !(private->rdc_data
.facilities
.RT_in_LR
)) {
1787 dev_err(&device
->cdev
->dev
, "The storage server does not "
1788 "support raw-track access\n");
1793 /* find the valid cylinder size */
1794 if (private->rdc_data
.no_cyl
== LV_COMPAT_CYL
&&
1795 private->rdc_data
.long_no_cyl
)
1796 private->real_cyl
= private->rdc_data
.long_no_cyl
;
1798 private->real_cyl
= private->rdc_data
.no_cyl
;
1800 private->fcx_max_data
= get_fcx_max_data(device
);
1802 readonly
= dasd_device_is_ro(device
);
1804 set_bit(DASD_FLAG_DEVICE_RO
, &device
->flags
);
1806 dev_info(&device
->cdev
->dev
, "New DASD %04X/%02X (CU %04X/%02X) "
1807 "with %d cylinders, %d heads, %d sectors%s\n",
1808 private->rdc_data
.dev_type
,
1809 private->rdc_data
.dev_model
,
1810 private->rdc_data
.cu_type
,
1811 private->rdc_data
.cu_model
.model
,
1813 private->rdc_data
.trk_per_cyl
,
1814 private->rdc_data
.sec_per_trk
,
1815 readonly
? ", read-only device" : "");
1819 dasd_alias_disconnect_device_from_lcu(device
);
1821 dasd_free_block(device
->block
);
1822 device
->block
= NULL
;
1824 kfree(private->conf_data
);
1825 kfree(device
->private);
1826 device
->private = NULL
;
1830 static void dasd_eckd_uncheck_device(struct dasd_device
*device
)
1832 struct dasd_eckd_private
*private = device
->private;
1835 dasd_alias_disconnect_device_from_lcu(device
);
1836 private->ned
= NULL
;
1837 private->sneq
= NULL
;
1838 private->vdsneq
= NULL
;
1839 private->gneq
= NULL
;
1840 private->conf_len
= 0;
1841 for (i
= 0; i
< 8; i
++) {
1842 kfree(private->path_conf_data
[i
]);
1843 if ((__u8
*)private->path_conf_data
[i
] ==
1844 private->conf_data
) {
1845 private->conf_data
= NULL
;
1846 private->conf_len
= 0;
1848 private->path_conf_data
[i
] = NULL
;
1850 kfree(private->conf_data
);
1851 private->conf_data
= NULL
;
1854 static struct dasd_ccw_req
*
1855 dasd_eckd_analysis_ccw(struct dasd_device
*device
)
1857 struct dasd_eckd_private
*private = device
->private;
1858 struct eckd_count
*count_data
;
1859 struct LO_eckd_data
*LO_data
;
1860 struct dasd_ccw_req
*cqr
;
1862 int cplength
, datasize
;
1866 datasize
= sizeof(struct DE_eckd_data
) + 2*sizeof(struct LO_eckd_data
);
1867 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, cplength
, datasize
, device
);
1871 /* Define extent for the first 3 tracks. */
1872 define_extent(ccw
++, cqr
->data
, 0, 2,
1873 DASD_ECKD_CCW_READ_COUNT
, device
);
1874 LO_data
= cqr
->data
+ sizeof(struct DE_eckd_data
);
1875 /* Locate record for the first 4 records on track 0. */
1876 ccw
[-1].flags
|= CCW_FLAG_CC
;
1877 locate_record(ccw
++, LO_data
++, 0, 0, 4,
1878 DASD_ECKD_CCW_READ_COUNT
, device
, 0);
1880 count_data
= private->count_area
;
1881 for (i
= 0; i
< 4; i
++) {
1882 ccw
[-1].flags
|= CCW_FLAG_CC
;
1883 ccw
->cmd_code
= DASD_ECKD_CCW_READ_COUNT
;
1886 ccw
->cda
= (__u32
)(addr_t
) count_data
;
1891 /* Locate record for the first record on track 2. */
1892 ccw
[-1].flags
|= CCW_FLAG_CC
;
1893 locate_record(ccw
++, LO_data
++, 2, 0, 1,
1894 DASD_ECKD_CCW_READ_COUNT
, device
, 0);
1895 /* Read count ccw. */
1896 ccw
[-1].flags
|= CCW_FLAG_CC
;
1897 ccw
->cmd_code
= DASD_ECKD_CCW_READ_COUNT
;
1900 ccw
->cda
= (__u32
)(addr_t
) count_data
;
1903 cqr
->startdev
= device
;
1904 cqr
->memdev
= device
;
1906 cqr
->buildclk
= get_tod_clock();
1907 cqr
->status
= DASD_CQR_FILLED
;
1911 /* differentiate between 'no record found' and any other error */
1912 static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req
*init_cqr
)
1915 if (init_cqr
->status
== DASD_CQR_DONE
)
1917 else if (init_cqr
->status
== DASD_CQR_NEED_ERP
||
1918 init_cqr
->status
== DASD_CQR_FAILED
) {
1919 sense
= dasd_get_sense(&init_cqr
->irb
);
1920 if (sense
&& (sense
[1] & SNS1_NO_REC_FOUND
))
1921 return INIT_CQR_UNFORMATTED
;
1923 return INIT_CQR_ERROR
;
1925 return INIT_CQR_ERROR
;
1929 * This is the callback function for the init_analysis cqr. It saves
1930 * the status of the initial analysis ccw before it frees it and kicks
1931 * the device to continue the startup sequence. This will call
1932 * dasd_eckd_do_analysis again (if the devices has not been marked
1933 * for deletion in the meantime).
1935 static void dasd_eckd_analysis_callback(struct dasd_ccw_req
*init_cqr
,
1938 struct dasd_device
*device
= init_cqr
->startdev
;
1939 struct dasd_eckd_private
*private = device
->private;
1941 private->init_cqr_status
= dasd_eckd_analysis_evaluation(init_cqr
);
1942 dasd_sfree_request(init_cqr
, device
);
1943 dasd_kick_device(device
);
1946 static int dasd_eckd_start_analysis(struct dasd_block
*block
)
1948 struct dasd_ccw_req
*init_cqr
;
1950 init_cqr
= dasd_eckd_analysis_ccw(block
->base
);
1951 if (IS_ERR(init_cqr
))
1952 return PTR_ERR(init_cqr
);
1953 init_cqr
->callback
= dasd_eckd_analysis_callback
;
1954 init_cqr
->callback_data
= NULL
;
1955 init_cqr
->expires
= 5*HZ
;
1956 /* first try without ERP, so we can later handle unformatted
1957 * devices as special case
1959 clear_bit(DASD_CQR_FLAGS_USE_ERP
, &init_cqr
->flags
);
1960 init_cqr
->retries
= 0;
1961 dasd_add_request_head(init_cqr
);
1965 static int dasd_eckd_end_analysis(struct dasd_block
*block
)
1967 struct dasd_device
*device
= block
->base
;
1968 struct dasd_eckd_private
*private = device
->private;
1969 struct eckd_count
*count_area
;
1970 unsigned int sb
, blk_per_trk
;
1972 struct dasd_ccw_req
*init_cqr
;
1974 status
= private->init_cqr_status
;
1975 private->init_cqr_status
= -1;
1976 if (status
== INIT_CQR_ERROR
) {
1977 /* try again, this time with full ERP */
1978 init_cqr
= dasd_eckd_analysis_ccw(device
);
1979 dasd_sleep_on(init_cqr
);
1980 status
= dasd_eckd_analysis_evaluation(init_cqr
);
1981 dasd_sfree_request(init_cqr
, device
);
1984 if (device
->features
& DASD_FEATURE_USERAW
) {
1985 block
->bp_block
= DASD_RAW_BLOCKSIZE
;
1986 blk_per_trk
= DASD_RAW_BLOCK_PER_TRACK
;
1987 block
->s2b_shift
= 3;
1991 if (status
== INIT_CQR_UNFORMATTED
) {
1992 dev_warn(&device
->cdev
->dev
, "The DASD is not formatted\n");
1993 return -EMEDIUMTYPE
;
1994 } else if (status
== INIT_CQR_ERROR
) {
1995 dev_err(&device
->cdev
->dev
,
1996 "Detecting the DASD disk layout failed because "
1997 "of an I/O error\n");
2001 private->uses_cdl
= 1;
2002 /* Check Track 0 for Compatible Disk Layout */
2004 for (i
= 0; i
< 3; i
++) {
2005 if (private->count_area
[i
].kl
!= 4 ||
2006 private->count_area
[i
].dl
!= dasd_eckd_cdl_reclen(i
) - 4 ||
2007 private->count_area
[i
].cyl
!= 0 ||
2008 private->count_area
[i
].head
!= count_area_head
[i
] ||
2009 private->count_area
[i
].record
!= count_area_rec
[i
]) {
2010 private->uses_cdl
= 0;
2015 count_area
= &private->count_area
[4];
2017 if (private->uses_cdl
== 0) {
2018 for (i
= 0; i
< 5; i
++) {
2019 if ((private->count_area
[i
].kl
!= 0) ||
2020 (private->count_area
[i
].dl
!=
2021 private->count_area
[0].dl
) ||
2022 private->count_area
[i
].cyl
!= 0 ||
2023 private->count_area
[i
].head
!= count_area_head
[i
] ||
2024 private->count_area
[i
].record
!= count_area_rec
[i
])
2028 count_area
= &private->count_area
[0];
2030 if (private->count_area
[3].record
== 1)
2031 dev_warn(&device
->cdev
->dev
,
2032 "Track 0 has no records following the VTOC\n");
2035 if (count_area
!= NULL
&& count_area
->kl
== 0) {
2036 /* we found notthing violating our disk layout */
2037 if (dasd_check_blocksize(count_area
->dl
) == 0)
2038 block
->bp_block
= count_area
->dl
;
2040 if (block
->bp_block
== 0) {
2041 dev_warn(&device
->cdev
->dev
,
2042 "The disk layout of the DASD is not supported\n");
2043 return -EMEDIUMTYPE
;
2045 block
->s2b_shift
= 0; /* bits to shift 512 to get a block */
2046 for (sb
= 512; sb
< block
->bp_block
; sb
= sb
<< 1)
2049 blk_per_trk
= recs_per_track(&private->rdc_data
, 0, block
->bp_block
);
2052 block
->blocks
= (private->real_cyl
*
2053 private->rdc_data
.trk_per_cyl
*
2056 dev_info(&device
->cdev
->dev
,
2057 "DASD with %d KB/block, %d KB total size, %d KB/track, "
2058 "%s\n", (block
->bp_block
>> 10),
2059 ((private->real_cyl
*
2060 private->rdc_data
.trk_per_cyl
*
2061 blk_per_trk
* (block
->bp_block
>> 9)) >> 1),
2062 ((blk_per_trk
* block
->bp_block
) >> 10),
2064 "compatible disk layout" : "linux disk layout");
2069 static int dasd_eckd_do_analysis(struct dasd_block
*block
)
2071 struct dasd_eckd_private
*private = block
->base
->private;
2073 if (private->init_cqr_status
< 0)
2074 return dasd_eckd_start_analysis(block
);
2076 return dasd_eckd_end_analysis(block
);
2079 static int dasd_eckd_basic_to_ready(struct dasd_device
*device
)
2081 return dasd_alias_add_device(device
);
2084 static int dasd_eckd_online_to_ready(struct dasd_device
*device
)
2086 cancel_work_sync(&device
->reload_device
);
2087 cancel_work_sync(&device
->kick_validate
);
2091 static int dasd_eckd_basic_to_known(struct dasd_device
*device
)
2093 return dasd_alias_remove_device(device
);
2097 dasd_eckd_fill_geometry(struct dasd_block
*block
, struct hd_geometry
*geo
)
2099 struct dasd_eckd_private
*private = block
->base
->private;
2101 if (dasd_check_blocksize(block
->bp_block
) == 0) {
2102 geo
->sectors
= recs_per_track(&private->rdc_data
,
2103 0, block
->bp_block
);
2105 geo
->cylinders
= private->rdc_data
.no_cyl
;
2106 geo
->heads
= private->rdc_data
.trk_per_cyl
;
2111 * Build the TCW request for the format check
2113 static struct dasd_ccw_req
*
2114 dasd_eckd_build_check_tcw(struct dasd_device
*base
, struct format_data_t
*fdata
,
2115 int enable_pav
, struct eckd_count
*fmt_buffer
,
2118 struct dasd_eckd_private
*start_priv
;
2119 struct dasd_device
*startdev
= NULL
;
2120 struct tidaw
*last_tidaw
= NULL
;
2121 struct dasd_ccw_req
*cqr
;
2129 startdev
= dasd_alias_get_start_dev(base
);
2134 start_priv
= startdev
->private;
2136 count
= rpt
* (fdata
->stop_unit
- fdata
->start_unit
+ 1);
2139 * we're adding 'count' amount of tidaw to the itcw.
2140 * calculate the corresponding itcw_size
2142 itcw_size
= itcw_calc_size(0, count
, 0);
2144 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 0, itcw_size
, startdev
);
2148 start_priv
->count
++;
2150 itcw
= itcw_init(cqr
->data
, itcw_size
, ITCW_OP_READ
, 0, count
, 0);
2156 cqr
->cpaddr
= itcw_get_tcw(itcw
);
2157 rc
= prepare_itcw(itcw
, fdata
->start_unit
, fdata
->stop_unit
,
2158 DASD_ECKD_CCW_READ_COUNT_MT
, base
, startdev
, 0, count
,
2159 sizeof(struct eckd_count
),
2160 count
* sizeof(struct eckd_count
), 0, rpt
);
2164 for (i
= 0; i
< count
; i
++) {
2165 last_tidaw
= itcw_add_tidaw(itcw
, 0, fmt_buffer
++,
2166 sizeof(struct eckd_count
));
2167 if (IS_ERR(last_tidaw
)) {
2173 last_tidaw
->flags
|= TIDAW_FLAGS_LAST
;
2174 itcw_finalize(itcw
);
2177 cqr
->startdev
= startdev
;
2178 cqr
->memdev
= startdev
;
2179 cqr
->basedev
= base
;
2180 cqr
->retries
= startdev
->default_retries
;
2181 cqr
->expires
= startdev
->default_expires
* HZ
;
2182 cqr
->buildclk
= get_tod_clock();
2183 cqr
->status
= DASD_CQR_FILLED
;
2184 /* Set flags to suppress output for expected errors */
2185 set_bit(DASD_CQR_SUPPRESS_FP
, &cqr
->flags
);
2186 set_bit(DASD_CQR_SUPPRESS_IL
, &cqr
->flags
);
2191 dasd_sfree_request(cqr
, startdev
);
2197 * Build the CCW request for the format check
2199 static struct dasd_ccw_req
*
2200 dasd_eckd_build_check(struct dasd_device
*base
, struct format_data_t
*fdata
,
2201 int enable_pav
, struct eckd_count
*fmt_buffer
, int rpt
)
2203 struct dasd_eckd_private
*start_priv
;
2204 struct dasd_eckd_private
*base_priv
;
2205 struct dasd_device
*startdev
= NULL
;
2206 struct dasd_ccw_req
*cqr
;
2209 int cplength
, datasize
;
2215 startdev
= dasd_alias_get_start_dev(base
);
2220 start_priv
= startdev
->private;
2221 base_priv
= base
->private;
2223 count
= rpt
* (fdata
->stop_unit
- fdata
->start_unit
+ 1);
2225 use_prefix
= base_priv
->features
.feature
[8] & 0x01;
2229 datasize
= sizeof(struct PFX_eckd_data
);
2232 datasize
= sizeof(struct DE_eckd_data
) +
2233 sizeof(struct LO_eckd_data
);
2237 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, cplength
, datasize
,
2242 start_priv
->count
++;
2247 prefix_LRE(ccw
++, data
, fdata
->start_unit
, fdata
->stop_unit
,
2248 DASD_ECKD_CCW_READ_COUNT
, base
, startdev
, 1, 0,
2251 define_extent(ccw
++, data
, fdata
->start_unit
, fdata
->stop_unit
,
2252 DASD_ECKD_CCW_READ_COUNT
, startdev
);
2254 data
+= sizeof(struct DE_eckd_data
);
2255 ccw
[-1].flags
|= CCW_FLAG_CC
;
2257 locate_record(ccw
++, data
, fdata
->start_unit
, 0, count
,
2258 DASD_ECKD_CCW_READ_COUNT
, base
, 0);
2261 for (i
= 0; i
< count
; i
++) {
2262 ccw
[-1].flags
|= CCW_FLAG_CC
;
2263 ccw
->cmd_code
= DASD_ECKD_CCW_READ_COUNT
;
2264 ccw
->flags
= CCW_FLAG_SLI
;
2266 ccw
->cda
= (__u32
)(addr_t
) fmt_buffer
;
2271 cqr
->startdev
= startdev
;
2272 cqr
->memdev
= startdev
;
2273 cqr
->basedev
= base
;
2274 cqr
->retries
= DASD_RETRIES
;
2275 cqr
->expires
= startdev
->default_expires
* HZ
;
2276 cqr
->buildclk
= get_tod_clock();
2277 cqr
->status
= DASD_CQR_FILLED
;
2278 /* Set flags to suppress output for expected errors */
2279 set_bit(DASD_CQR_SUPPRESS_NRF
, &cqr
->flags
);
2284 static struct dasd_ccw_req
*
2285 dasd_eckd_build_format(struct dasd_device
*base
,
2286 struct format_data_t
*fdata
,
2289 struct dasd_eckd_private
*base_priv
;
2290 struct dasd_eckd_private
*start_priv
;
2291 struct dasd_device
*startdev
= NULL
;
2292 struct dasd_ccw_req
*fcp
;
2293 struct eckd_count
*ect
;
2294 struct ch_t address
;
2298 int cplength
, datasize
;
2306 startdev
= dasd_alias_get_start_dev(base
);
2311 start_priv
= startdev
->private;
2312 base_priv
= base
->private;
2314 rpt
= recs_per_track(&base_priv
->rdc_data
, 0, fdata
->blksize
);
2316 nr_tracks
= fdata
->stop_unit
- fdata
->start_unit
+ 1;
2319 * fdata->intensity is a bit string that tells us what to do:
2320 * Bit 0: write record zero
2321 * Bit 1: write home address, currently not supported
2322 * Bit 2: invalidate tracks
2323 * Bit 3: use OS/390 compatible disk layout (cdl)
2324 * Bit 4: do not allow storage subsystem to modify record zero
2325 * Only some bit combinations do make sense.
2327 if (fdata
->intensity
& 0x10) {
2329 intensity
= fdata
->intensity
& ~0x10;
2332 intensity
= fdata
->intensity
;
2335 use_prefix
= base_priv
->features
.feature
[8] & 0x01;
2337 switch (intensity
) {
2338 case 0x00: /* Normal format */
2339 case 0x08: /* Normal format, use cdl. */
2340 cplength
= 2 + (rpt
*nr_tracks
);
2342 datasize
= sizeof(struct PFX_eckd_data
) +
2343 sizeof(struct LO_eckd_data
) +
2344 rpt
* nr_tracks
* sizeof(struct eckd_count
);
2346 datasize
= sizeof(struct DE_eckd_data
) +
2347 sizeof(struct LO_eckd_data
) +
2348 rpt
* nr_tracks
* sizeof(struct eckd_count
);
2350 case 0x01: /* Write record zero and format track. */
2351 case 0x09: /* Write record zero and format track, use cdl. */
2352 cplength
= 2 + rpt
* nr_tracks
;
2354 datasize
= sizeof(struct PFX_eckd_data
) +
2355 sizeof(struct LO_eckd_data
) +
2356 sizeof(struct eckd_count
) +
2357 rpt
* nr_tracks
* sizeof(struct eckd_count
);
2359 datasize
= sizeof(struct DE_eckd_data
) +
2360 sizeof(struct LO_eckd_data
) +
2361 sizeof(struct eckd_count
) +
2362 rpt
* nr_tracks
* sizeof(struct eckd_count
);
2364 case 0x04: /* Invalidate track. */
2365 case 0x0c: /* Invalidate track, use cdl. */
2368 datasize
= sizeof(struct PFX_eckd_data
) +
2369 sizeof(struct LO_eckd_data
) +
2370 sizeof(struct eckd_count
);
2372 datasize
= sizeof(struct DE_eckd_data
) +
2373 sizeof(struct LO_eckd_data
) +
2374 sizeof(struct eckd_count
);
2377 dev_warn(&startdev
->cdev
->dev
,
2378 "An I/O control call used incorrect flags 0x%x\n",
2380 return ERR_PTR(-EINVAL
);
2382 /* Allocate the format ccw request. */
2383 fcp
= dasd_smalloc_request(DASD_ECKD_MAGIC
, cplength
,
2384 datasize
, startdev
);
2388 start_priv
->count
++;
2392 switch (intensity
& ~0x08) {
2393 case 0x00: /* Normal format. */
2395 prefix(ccw
++, (struct PFX_eckd_data
*) data
,
2396 fdata
->start_unit
, fdata
->stop_unit
,
2397 DASD_ECKD_CCW_WRITE_CKD
, base
, startdev
);
2398 /* grant subsystem permission to format R0 */
2400 ((struct PFX_eckd_data
*)data
)
2401 ->define_extent
.ga_extended
|= 0x04;
2402 data
+= sizeof(struct PFX_eckd_data
);
2404 define_extent(ccw
++, (struct DE_eckd_data
*) data
,
2405 fdata
->start_unit
, fdata
->stop_unit
,
2406 DASD_ECKD_CCW_WRITE_CKD
, startdev
);
2407 /* grant subsystem permission to format R0 */
2409 ((struct DE_eckd_data
*) data
)
2410 ->ga_extended
|= 0x04;
2411 data
+= sizeof(struct DE_eckd_data
);
2413 ccw
[-1].flags
|= CCW_FLAG_CC
;
2414 locate_record(ccw
++, (struct LO_eckd_data
*) data
,
2415 fdata
->start_unit
, 0, rpt
*nr_tracks
,
2416 DASD_ECKD_CCW_WRITE_CKD
, base
,
2418 data
+= sizeof(struct LO_eckd_data
);
2420 case 0x01: /* Write record zero + format track. */
2422 prefix(ccw
++, (struct PFX_eckd_data
*) data
,
2423 fdata
->start_unit
, fdata
->stop_unit
,
2424 DASD_ECKD_CCW_WRITE_RECORD_ZERO
,
2426 data
+= sizeof(struct PFX_eckd_data
);
2428 define_extent(ccw
++, (struct DE_eckd_data
*) data
,
2429 fdata
->start_unit
, fdata
->stop_unit
,
2430 DASD_ECKD_CCW_WRITE_RECORD_ZERO
, startdev
);
2431 data
+= sizeof(struct DE_eckd_data
);
2433 ccw
[-1].flags
|= CCW_FLAG_CC
;
2434 locate_record(ccw
++, (struct LO_eckd_data
*) data
,
2435 fdata
->start_unit
, 0, rpt
* nr_tracks
+ 1,
2436 DASD_ECKD_CCW_WRITE_RECORD_ZERO
, base
,
2437 base
->block
->bp_block
);
2438 data
+= sizeof(struct LO_eckd_data
);
2440 case 0x04: /* Invalidate track. */
2442 prefix(ccw
++, (struct PFX_eckd_data
*) data
,
2443 fdata
->start_unit
, fdata
->stop_unit
,
2444 DASD_ECKD_CCW_WRITE_CKD
, base
, startdev
);
2445 data
+= sizeof(struct PFX_eckd_data
);
2447 define_extent(ccw
++, (struct DE_eckd_data
*) data
,
2448 fdata
->start_unit
, fdata
->stop_unit
,
2449 DASD_ECKD_CCW_WRITE_CKD
, startdev
);
2450 data
+= sizeof(struct DE_eckd_data
);
2452 ccw
[-1].flags
|= CCW_FLAG_CC
;
2453 locate_record(ccw
++, (struct LO_eckd_data
*) data
,
2454 fdata
->start_unit
, 0, 1,
2455 DASD_ECKD_CCW_WRITE_CKD
, base
, 8);
2456 data
+= sizeof(struct LO_eckd_data
);
2460 for (j
= 0; j
< nr_tracks
; j
++) {
2461 /* calculate cylinder and head for the current track */
2463 (fdata
->start_unit
+ j
) /
2464 base_priv
->rdc_data
.trk_per_cyl
,
2465 (fdata
->start_unit
+ j
) %
2466 base_priv
->rdc_data
.trk_per_cyl
);
2467 if (intensity
& 0x01) { /* write record zero */
2468 ect
= (struct eckd_count
*) data
;
2469 data
+= sizeof(struct eckd_count
);
2470 ect
->cyl
= address
.cyl
;
2471 ect
->head
= address
.head
;
2475 ccw
[-1].flags
|= CCW_FLAG_CC
;
2476 ccw
->cmd_code
= DASD_ECKD_CCW_WRITE_RECORD_ZERO
;
2477 ccw
->flags
= CCW_FLAG_SLI
;
2479 ccw
->cda
= (__u32
)(addr_t
) ect
;
2482 if ((intensity
& ~0x08) & 0x04) { /* erase track */
2483 ect
= (struct eckd_count
*) data
;
2484 data
+= sizeof(struct eckd_count
);
2485 ect
->cyl
= address
.cyl
;
2486 ect
->head
= address
.head
;
2490 ccw
[-1].flags
|= CCW_FLAG_CC
;
2491 ccw
->cmd_code
= DASD_ECKD_CCW_WRITE_CKD
;
2492 ccw
->flags
= CCW_FLAG_SLI
;
2494 ccw
->cda
= (__u32
)(addr_t
) ect
;
2495 } else { /* write remaining records */
2496 for (i
= 0; i
< rpt
; i
++) {
2497 ect
= (struct eckd_count
*) data
;
2498 data
+= sizeof(struct eckd_count
);
2499 ect
->cyl
= address
.cyl
;
2500 ect
->head
= address
.head
;
2501 ect
->record
= i
+ 1;
2503 ect
->dl
= fdata
->blksize
;
2505 * Check for special tracks 0-1
2506 * when formatting CDL
2508 if ((intensity
& 0x08) &&
2509 address
.cyl
== 0 && address
.head
== 0) {
2512 ect
->dl
= sizes_trk0
[i
] - 4;
2515 if ((intensity
& 0x08) &&
2516 address
.cyl
== 0 && address
.head
== 1) {
2518 ect
->dl
= LABEL_SIZE
- 44;
2520 ccw
[-1].flags
|= CCW_FLAG_CC
;
2521 if (i
!= 0 || j
== 0)
2523 DASD_ECKD_CCW_WRITE_CKD
;
2526 DASD_ECKD_CCW_WRITE_CKD_MT
;
2527 ccw
->flags
= CCW_FLAG_SLI
;
2529 ccw
->cda
= (__u32
)(addr_t
) ect
;
2535 fcp
->startdev
= startdev
;
2536 fcp
->memdev
= startdev
;
2537 fcp
->basedev
= base
;
2539 fcp
->expires
= startdev
->default_expires
* HZ
;
2540 fcp
->buildclk
= get_tod_clock();
2541 fcp
->status
= DASD_CQR_FILLED
;
2547 * Wrapper function to build a CCW request depending on input data
2549 static struct dasd_ccw_req
*
2550 dasd_eckd_format_build_ccw_req(struct dasd_device
*base
,
2551 struct format_data_t
*fdata
, int enable_pav
,
2552 int tpm
, struct eckd_count
*fmt_buffer
, int rpt
)
2554 struct dasd_ccw_req
*ccw_req
;
2557 ccw_req
= dasd_eckd_build_format(base
, fdata
, enable_pav
);
2560 ccw_req
= dasd_eckd_build_check_tcw(base
, fdata
,
2564 ccw_req
= dasd_eckd_build_check(base
, fdata
, enable_pav
,
2572 * Sanity checks on format_data
2574 static int dasd_eckd_format_sanity_checks(struct dasd_device
*base
,
2575 struct format_data_t
*fdata
)
2577 struct dasd_eckd_private
*private = base
->private;
2579 if (fdata
->start_unit
>=
2580 (private->real_cyl
* private->rdc_data
.trk_per_cyl
)) {
2581 dev_warn(&base
->cdev
->dev
,
2582 "Start track number %u used in formatting is too big\n",
2586 if (fdata
->stop_unit
>=
2587 (private->real_cyl
* private->rdc_data
.trk_per_cyl
)) {
2588 dev_warn(&base
->cdev
->dev
,
2589 "Stop track number %u used in formatting is too big\n",
2593 if (fdata
->start_unit
> fdata
->stop_unit
) {
2594 dev_warn(&base
->cdev
->dev
,
2595 "Start track %u used in formatting exceeds end track\n",
2599 if (dasd_check_blocksize(fdata
->blksize
) != 0) {
2600 dev_warn(&base
->cdev
->dev
,
2601 "The DASD cannot be formatted with block size %u\n",
2609 * This function will process format_data originally coming from an IOCTL
2611 static int dasd_eckd_format_process_data(struct dasd_device
*base
,
2612 struct format_data_t
*fdata
,
2613 int enable_pav
, int tpm
,
2614 struct eckd_count
*fmt_buffer
, int rpt
,
2617 struct dasd_eckd_private
*private = base
->private;
2618 struct dasd_ccw_req
*cqr
, *n
;
2619 struct list_head format_queue
;
2620 struct dasd_device
*device
;
2622 int old_start
, old_stop
, format_step
;
2626 rc
= dasd_eckd_format_sanity_checks(base
, fdata
);
2630 INIT_LIST_HEAD(&format_queue
);
2632 old_start
= fdata
->start_unit
;
2633 old_stop
= fdata
->stop_unit
;
2635 if (!tpm
&& fmt_buffer
!= NULL
) {
2636 /* Command Mode / Format Check */
2638 } else if (tpm
&& fmt_buffer
!= NULL
) {
2639 /* Transport Mode / Format Check */
2640 format_step
= DASD_CQR_MAX_CCW
/ rpt
;
2642 /* Normal Formatting */
2643 format_step
= DASD_CQR_MAX_CCW
/
2644 recs_per_track(&private->rdc_data
, 0, fdata
->blksize
);
2649 while (fdata
->start_unit
<= old_stop
) {
2650 step
= fdata
->stop_unit
- fdata
->start_unit
+ 1;
2651 if (step
> format_step
) {
2653 fdata
->start_unit
+ format_step
- 1;
2656 cqr
= dasd_eckd_format_build_ccw_req(base
, fdata
,
2661 if (rc
== -ENOMEM
) {
2662 if (list_empty(&format_queue
))
2665 * not enough memory available, start
2666 * requests retry after first requests
2674 list_add_tail(&cqr
->blocklist
, &format_queue
);
2677 step
= fdata
->stop_unit
- fdata
->start_unit
+ 1;
2678 fmt_buffer
+= rpt
* step
;
2680 fdata
->start_unit
= fdata
->stop_unit
+ 1;
2681 fdata
->stop_unit
= old_stop
;
2684 rc
= dasd_sleep_on_queue(&format_queue
);
2687 list_for_each_entry_safe(cqr
, n
, &format_queue
, blocklist
) {
2688 device
= cqr
->startdev
;
2689 private = device
->private;
2691 if (cqr
->status
== DASD_CQR_FAILED
) {
2693 * Only get sense data if called by format
2696 if (fmt_buffer
&& irb
) {
2697 sense
= dasd_get_sense(&cqr
->irb
);
2698 memcpy(irb
, &cqr
->irb
, sizeof(*irb
));
2702 list_del_init(&cqr
->blocklist
);
2703 dasd_sfree_request(cqr
, device
);
2707 if (rc
&& rc
!= -EIO
)
2711 * In case fewer than the expected records are on the
2712 * track, we will most likely get a 'No Record Found'
2713 * error (in command mode) or a 'File Protected' error
2714 * (in transport mode). Those particular cases shouldn't
2715 * pass the -EIO to the IOCTL, therefore reset the rc
2719 (sense
[1] & SNS1_NO_REC_FOUND
||
2720 sense
[1] & SNS1_FILE_PROTECTED
))
2729 fdata
->start_unit
= old_start
;
2730 fdata
->stop_unit
= old_stop
;
2735 static int dasd_eckd_format_device(struct dasd_device
*base
,
2736 struct format_data_t
*fdata
, int enable_pav
)
2738 return dasd_eckd_format_process_data(base
, fdata
, enable_pav
, 0, NULL
,
2743 * Helper function to count consecutive records of a single track.
2745 static int dasd_eckd_count_records(struct eckd_count
*fmt_buffer
, int start
,
2751 head
= fmt_buffer
[start
].head
;
2754 * There are 3 conditions where we stop counting:
2755 * - if data reoccurs (same head and record may reoccur), which may
2756 * happen due to the way DASD_ECKD_CCW_READ_COUNT works
2757 * - when the head changes, because we're iterating over several tracks
2758 * then (DASD_ECKD_CCW_READ_COUNT_MT)
2759 * - when we've reached the end of sensible data in the buffer (the
2760 * record will be 0 then)
2762 for (i
= start
; i
< max
; i
++) {
2764 if ((fmt_buffer
[i
].head
== head
&&
2765 fmt_buffer
[i
].record
== 1) ||
2766 fmt_buffer
[i
].head
!= head
||
2767 fmt_buffer
[i
].record
== 0)
2776 * Evaluate a given range of tracks. Data like number of records, blocksize,
2777 * record ids, and key length are compared with expected data.
2779 * If a mismatch occurs, the corresponding error bit is set, as well as
2780 * additional information, depending on the error.
2782 static void dasd_eckd_format_evaluate_tracks(struct eckd_count
*fmt_buffer
,
2783 struct format_check_t
*cdata
,
2784 int rpt_max
, int rpt_exp
,
2785 int trk_per_cyl
, int tpm
)
2796 trkcount
= cdata
->expect
.stop_unit
- cdata
->expect
.start_unit
+ 1;
2797 max_entries
= trkcount
* rpt_max
;
2799 for (i
= cdata
->expect
.start_unit
; i
<= cdata
->expect
.stop_unit
; i
++) {
2800 /* Calculate the correct next starting position in the buffer */
2802 while (fmt_buffer
[pos
].record
== 0 &&
2803 fmt_buffer
[pos
].dl
== 0) {
2804 if (pos
++ > max_entries
)
2808 if (i
!= cdata
->expect
.start_unit
)
2809 pos
+= rpt_max
- count
;
2812 /* Calculate the expected geo values for the current track */
2813 set_ch_t(&geo
, i
/ trk_per_cyl
, i
% trk_per_cyl
);
2815 /* Count and check number of records */
2816 count
= dasd_eckd_count_records(fmt_buffer
, pos
, pos
+ rpt_max
);
2818 if (count
< rpt_exp
) {
2819 cdata
->result
= DASD_FMT_ERR_TOO_FEW_RECORDS
;
2822 if (count
> rpt_exp
) {
2823 cdata
->result
= DASD_FMT_ERR_TOO_MANY_RECORDS
;
2827 for (j
= 0; j
< count
; j
++, pos
++) {
2828 blksize
= cdata
->expect
.blksize
;
2832 * Set special values when checking CDL formatted
2835 if ((cdata
->expect
.intensity
& 0x08) &&
2836 geo
.cyl
== 0 && geo
.head
== 0) {
2838 blksize
= sizes_trk0
[j
] - 4;
2842 if ((cdata
->expect
.intensity
& 0x08) &&
2843 geo
.cyl
== 0 && geo
.head
== 1) {
2844 blksize
= LABEL_SIZE
- 44;
2848 /* Check blocksize */
2849 if (fmt_buffer
[pos
].dl
!= blksize
) {
2850 cdata
->result
= DASD_FMT_ERR_BLKSIZE
;
2853 /* Check if key length is 0 */
2854 if (fmt_buffer
[pos
].kl
!= kl
) {
2855 cdata
->result
= DASD_FMT_ERR_KEY_LENGTH
;
2858 /* Check if record_id is correct */
2859 if (fmt_buffer
[pos
].cyl
!= geo
.cyl
||
2860 fmt_buffer
[pos
].head
!= geo
.head
||
2861 fmt_buffer
[pos
].record
!= (j
+ 1)) {
2862 cdata
->result
= DASD_FMT_ERR_RECORD_ID
;
2870 * In case of no errors, we need to decrease by one
2871 * to get the correct positions.
2873 if (!cdata
->result
) {
2879 cdata
->num_records
= count
;
2880 cdata
->rec
= fmt_buffer
[pos
].record
;
2881 cdata
->blksize
= fmt_buffer
[pos
].dl
;
2882 cdata
->key_length
= fmt_buffer
[pos
].kl
;
2886 * Check the format of a range of tracks of a DASD.
2888 static int dasd_eckd_check_device_format(struct dasd_device
*base
,
2889 struct format_check_t
*cdata
,
2892 struct dasd_eckd_private
*private = base
->private;
2893 struct eckd_count
*fmt_buffer
;
2895 int rpt_max
, rpt_exp
;
2896 int fmt_buffer_size
;
2902 trk_per_cyl
= private->rdc_data
.trk_per_cyl
;
2904 /* Get maximum and expected amount of records per track */
2905 rpt_max
= recs_per_track(&private->rdc_data
, 0, 512) + 1;
2906 rpt_exp
= recs_per_track(&private->rdc_data
, 0, cdata
->expect
.blksize
);
2908 trkcount
= cdata
->expect
.stop_unit
- cdata
->expect
.start_unit
+ 1;
2909 fmt_buffer_size
= trkcount
* rpt_max
* sizeof(struct eckd_count
);
2911 fmt_buffer
= kzalloc(fmt_buffer_size
, GFP_KERNEL
| GFP_DMA
);
2916 * A certain FICON feature subset is needed to operate in transport
2917 * mode. Additionally, the support for transport mode is implicitly
2918 * checked by comparing the buffer size with fcx_max_data. As long as
2919 * the buffer size is smaller we can operate in transport mode and
2920 * process multiple tracks. If not, only one track at once is being
2921 * processed using command mode.
2923 if ((private->features
.feature
[40] & 0x04) &&
2924 fmt_buffer_size
<= private->fcx_max_data
)
2927 rc
= dasd_eckd_format_process_data(base
, &cdata
->expect
, enable_pav
,
2928 tpm
, fmt_buffer
, rpt_max
, &irb
);
2929 if (rc
&& rc
!= -EIO
)
2933 * If our first attempt with transport mode enabled comes back
2934 * with an incorrect length error, we're going to retry the
2935 * check with command mode.
2937 if (tpm
&& scsw_cstat(&irb
.scsw
) == 0x40) {
2939 rc
= dasd_eckd_format_process_data(base
, &cdata
->expect
,
2941 fmt_buffer
, rpt_max
,
2950 dasd_eckd_format_evaluate_tracks(fmt_buffer
, cdata
, rpt_max
, rpt_exp
,
2959 static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req
*cqr
)
2961 if (cqr
->retries
< 0) {
2962 cqr
->status
= DASD_CQR_FAILED
;
2965 cqr
->status
= DASD_CQR_FILLED
;
2966 if (cqr
->block
&& (cqr
->startdev
!= cqr
->block
->base
)) {
2967 dasd_eckd_reset_ccw_to_base_io(cqr
);
2968 cqr
->startdev
= cqr
->block
->base
;
2969 cqr
->lpm
= cqr
->block
->base
->path_data
.opm
;
2973 static dasd_erp_fn_t
2974 dasd_eckd_erp_action(struct dasd_ccw_req
* cqr
)
2976 struct dasd_device
*device
= (struct dasd_device
*) cqr
->startdev
;
2977 struct ccw_device
*cdev
= device
->cdev
;
2979 switch (cdev
->id
.cu_type
) {
2984 return dasd_3990_erp_action
;
2988 return dasd_default_erp_action
;
2992 static dasd_erp_fn_t
2993 dasd_eckd_erp_postaction(struct dasd_ccw_req
* cqr
)
2995 return dasd_default_erp_postaction
;
2998 static void dasd_eckd_check_for_device_change(struct dasd_device
*device
,
2999 struct dasd_ccw_req
*cqr
,
3004 struct dasd_eckd_private
*private = device
->private;
3006 /* first of all check for state change pending interrupt */
3007 mask
= DEV_STAT_ATTENTION
| DEV_STAT_DEV_END
| DEV_STAT_UNIT_EXCEP
;
3008 if ((scsw_dstat(&irb
->scsw
) & mask
) == mask
) {
3010 * for alias only, not in offline processing
3011 * and only if not suspended
3013 if (!device
->block
&& private->lcu
&&
3014 device
->state
== DASD_STATE_ONLINE
&&
3015 !test_bit(DASD_FLAG_OFFLINE
, &device
->flags
) &&
3016 !test_bit(DASD_FLAG_SUSPENDED
, &device
->flags
)) {
3017 /* schedule worker to reload device */
3018 dasd_reload_device(device
);
3020 dasd_generic_handle_state_change(device
);
3024 sense
= dasd_get_sense(irb
);
3028 /* summary unit check */
3029 if ((sense
[27] & DASD_SENSE_BIT_0
) && (sense
[7] == 0x0D) &&
3030 (scsw_dstat(&irb
->scsw
) & DEV_STAT_UNIT_CHECK
)) {
3031 if (test_and_set_bit(DASD_FLAG_SUC
, &device
->flags
)) {
3032 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
3033 "eckd suc: device already notified");
3036 sense
= dasd_get_sense(irb
);
3038 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
3039 "eckd suc: no reason code available");
3040 clear_bit(DASD_FLAG_SUC
, &device
->flags
);
3044 private->suc_reason
= sense
[8];
3045 DBF_DEV_EVENT(DBF_NOTICE
, device
, "%s %x",
3046 "eckd handle summary unit check: reason",
3047 private->suc_reason
);
3048 dasd_get_device(device
);
3049 if (!schedule_work(&device
->suc_work
))
3050 dasd_put_device(device
);
3055 /* service information message SIM */
3056 if (!cqr
&& !(sense
[27] & DASD_SENSE_BIT_0
) &&
3057 ((sense
[6] & DASD_SIM_SENSE
) == DASD_SIM_SENSE
)) {
3058 dasd_3990_erp_handle_sim(device
, sense
);
3062 /* loss of device reservation is handled via base devices only
3063 * as alias devices may be used with several bases
3065 if (device
->block
&& (sense
[27] & DASD_SENSE_BIT_0
) &&
3066 (sense
[7] == 0x3F) &&
3067 (scsw_dstat(&irb
->scsw
) & DEV_STAT_UNIT_CHECK
) &&
3068 test_bit(DASD_FLAG_IS_RESERVED
, &device
->flags
)) {
3069 if (device
->features
& DASD_FEATURE_FAILONSLCK
)
3070 set_bit(DASD_FLAG_LOCK_STOLEN
, &device
->flags
);
3071 clear_bit(DASD_FLAG_IS_RESERVED
, &device
->flags
);
3072 dev_err(&device
->cdev
->dev
,
3073 "The device reservation was lost\n");
3077 static struct dasd_ccw_req
*dasd_eckd_build_cp_cmd_single(
3078 struct dasd_device
*startdev
,
3079 struct dasd_block
*block
,
3080 struct request
*req
,
3085 unsigned int first_offs
,
3086 unsigned int last_offs
,
3087 unsigned int blk_per_trk
,
3088 unsigned int blksize
)
3090 struct dasd_eckd_private
*private;
3091 unsigned long *idaws
;
3092 struct LO_eckd_data
*LO_data
;
3093 struct dasd_ccw_req
*cqr
;
3095 struct req_iterator iter
;
3099 int count
, cidaw
, cplength
, datasize
;
3101 unsigned char cmd
, rcmd
;
3103 struct dasd_device
*basedev
;
3105 basedev
= block
->base
;
3106 private = basedev
->private;
3107 if (rq_data_dir(req
) == READ
)
3108 cmd
= DASD_ECKD_CCW_READ_MT
;
3109 else if (rq_data_dir(req
) == WRITE
)
3110 cmd
= DASD_ECKD_CCW_WRITE_MT
;
3112 return ERR_PTR(-EINVAL
);
3114 /* Check struct bio and count the number of blocks for the request. */
3117 rq_for_each_segment(bv
, req
, iter
) {
3118 if (bv
.bv_len
& (blksize
- 1))
3119 /* Eckd can only do full blocks. */
3120 return ERR_PTR(-EINVAL
);
3121 count
+= bv
.bv_len
>> (block
->s2b_shift
+ 9);
3122 if (idal_is_needed (page_address(bv
.bv_page
), bv
.bv_len
))
3123 cidaw
+= bv
.bv_len
>> (block
->s2b_shift
+ 9);
3126 if (count
!= last_rec
- first_rec
+ 1)
3127 return ERR_PTR(-EINVAL
);
3129 /* use the prefix command if available */
3130 use_prefix
= private->features
.feature
[8] & 0x01;
3132 /* 1x prefix + number of blocks */
3133 cplength
= 2 + count
;
3134 /* 1x prefix + cidaws*sizeof(long) */
3135 datasize
= sizeof(struct PFX_eckd_data
) +
3136 sizeof(struct LO_eckd_data
) +
3137 cidaw
* sizeof(unsigned long);
3139 /* 1x define extent + 1x locate record + number of blocks */
3140 cplength
= 2 + count
;
3141 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */
3142 datasize
= sizeof(struct DE_eckd_data
) +
3143 sizeof(struct LO_eckd_data
) +
3144 cidaw
* sizeof(unsigned long);
3146 /* Find out the number of additional locate record ccws for cdl. */
3147 if (private->uses_cdl
&& first_rec
< 2*blk_per_trk
) {
3148 if (last_rec
>= 2*blk_per_trk
)
3149 count
= 2*blk_per_trk
- first_rec
;
3151 datasize
+= count
*sizeof(struct LO_eckd_data
);
3153 /* Allocate the ccw request. */
3154 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, cplength
, datasize
,
3159 /* First ccw is define extent or prefix. */
3161 if (prefix(ccw
++, cqr
->data
, first_trk
,
3162 last_trk
, cmd
, basedev
, startdev
) == -EAGAIN
) {
3163 /* Clock not in sync and XRC is enabled.
3166 dasd_sfree_request(cqr
, startdev
);
3167 return ERR_PTR(-EAGAIN
);
3169 idaws
= (unsigned long *) (cqr
->data
+
3170 sizeof(struct PFX_eckd_data
));
3172 if (define_extent(ccw
++, cqr
->data
, first_trk
,
3173 last_trk
, cmd
, basedev
) == -EAGAIN
) {
3174 /* Clock not in sync and XRC is enabled.
3177 dasd_sfree_request(cqr
, startdev
);
3178 return ERR_PTR(-EAGAIN
);
3180 idaws
= (unsigned long *) (cqr
->data
+
3181 sizeof(struct DE_eckd_data
));
3183 /* Build locate_record+read/write/ccws. */
3184 LO_data
= (struct LO_eckd_data
*) (idaws
+ cidaw
);
3186 if (private->uses_cdl
== 0 || recid
> 2*blk_per_trk
) {
3187 /* Only standard blocks so there is just one locate record. */
3188 ccw
[-1].flags
|= CCW_FLAG_CC
;
3189 locate_record(ccw
++, LO_data
++, first_trk
, first_offs
+ 1,
3190 last_rec
- recid
+ 1, cmd
, basedev
, blksize
);
3192 rq_for_each_segment(bv
, req
, iter
) {
3193 dst
= page_address(bv
.bv_page
) + bv
.bv_offset
;
3194 if (dasd_page_cache
) {
3195 char *copy
= kmem_cache_alloc(dasd_page_cache
,
3196 GFP_DMA
| __GFP_NOWARN
);
3197 if (copy
&& rq_data_dir(req
) == WRITE
)
3198 memcpy(copy
+ bv
.bv_offset
, dst
, bv
.bv_len
);
3200 dst
= copy
+ bv
.bv_offset
;
3202 for (off
= 0; off
< bv
.bv_len
; off
+= blksize
) {
3203 sector_t trkid
= recid
;
3204 unsigned int recoffs
= sector_div(trkid
, blk_per_trk
);
3207 /* Locate record for cdl special block ? */
3208 if (private->uses_cdl
&& recid
< 2*blk_per_trk
) {
3209 if (dasd_eckd_cdl_special(blk_per_trk
, recid
)){
3211 count
= dasd_eckd_cdl_reclen(recid
);
3212 if (count
< blksize
&&
3213 rq_data_dir(req
) == READ
)
3214 memset(dst
+ count
, 0xe5,
3217 ccw
[-1].flags
|= CCW_FLAG_CC
;
3218 locate_record(ccw
++, LO_data
++,
3220 1, rcmd
, basedev
, count
);
3222 /* Locate record for standard blocks ? */
3223 if (private->uses_cdl
&& recid
== 2*blk_per_trk
) {
3224 ccw
[-1].flags
|= CCW_FLAG_CC
;
3225 locate_record(ccw
++, LO_data
++,
3227 last_rec
- recid
+ 1,
3228 cmd
, basedev
, count
);
3230 /* Read/write ccw. */
3231 ccw
[-1].flags
|= CCW_FLAG_CC
;
3232 ccw
->cmd_code
= rcmd
;
3234 if (idal_is_needed(dst
, blksize
)) {
3235 ccw
->cda
= (__u32
)(addr_t
) idaws
;
3236 ccw
->flags
= CCW_FLAG_IDA
;
3237 idaws
= idal_create_words(idaws
, dst
, blksize
);
3239 ccw
->cda
= (__u32
)(addr_t
) dst
;
3247 if (blk_noretry_request(req
) ||
3248 block
->base
->features
& DASD_FEATURE_FAILFAST
)
3249 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
3250 cqr
->startdev
= startdev
;
3251 cqr
->memdev
= startdev
;
3253 cqr
->expires
= startdev
->default_expires
* HZ
; /* default 5 minutes */
3254 cqr
->lpm
= startdev
->path_data
.ppm
;
3255 cqr
->retries
= startdev
->default_retries
;
3256 cqr
->buildclk
= get_tod_clock();
3257 cqr
->status
= DASD_CQR_FILLED
;
3261 static struct dasd_ccw_req
*dasd_eckd_build_cp_cmd_track(
3262 struct dasd_device
*startdev
,
3263 struct dasd_block
*block
,
3264 struct request
*req
,
3269 unsigned int first_offs
,
3270 unsigned int last_offs
,
3271 unsigned int blk_per_trk
,
3272 unsigned int blksize
)
3274 unsigned long *idaws
;
3275 struct dasd_ccw_req
*cqr
;
3277 struct req_iterator iter
;
3279 char *dst
, *idaw_dst
;
3280 unsigned int cidaw
, cplength
, datasize
;
3284 struct dasd_device
*basedev
;
3285 unsigned int trkcount
, count
, count_to_trk_end
;
3286 unsigned int idaw_len
, seg_len
, part_len
, len_to_track_end
;
3287 unsigned char new_track
, end_idaw
;
3289 unsigned int recoffs
;
3291 basedev
= block
->base
;
3292 if (rq_data_dir(req
) == READ
)
3293 cmd
= DASD_ECKD_CCW_READ_TRACK_DATA
;
3294 else if (rq_data_dir(req
) == WRITE
)
3295 cmd
= DASD_ECKD_CCW_WRITE_TRACK_DATA
;
3297 return ERR_PTR(-EINVAL
);
3299 /* Track based I/O needs IDAWs for each page, and not just for
3300 * 64 bit addresses. We need additional idals for pages
3301 * that get filled from two tracks, so we use the number
3302 * of records as upper limit.
3304 cidaw
= last_rec
- first_rec
+ 1;
3305 trkcount
= last_trk
- first_trk
+ 1;
3307 /* 1x prefix + one read/write ccw per track */
3308 cplength
= 1 + trkcount
;
3310 /* on 31-bit we need space for two 32 bit addresses per page
3311 * on 64-bit one 64 bit address
3313 datasize
= sizeof(struct PFX_eckd_data
) +
3314 cidaw
* sizeof(unsigned long long);
3316 /* Allocate the ccw request. */
3317 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, cplength
, datasize
,
3322 /* transfer length factor: how many bytes to read from the last track */
3323 if (first_trk
== last_trk
)
3324 tlf
= last_offs
- first_offs
+ 1;
3326 tlf
= last_offs
+ 1;
3329 if (prefix_LRE(ccw
++, cqr
->data
, first_trk
,
3330 last_trk
, cmd
, basedev
, startdev
,
3331 1 /* format */, first_offs
+ 1,
3334 /* Clock not in sync and XRC is enabled.
3337 dasd_sfree_request(cqr
, startdev
);
3338 return ERR_PTR(-EAGAIN
);
3342 * The translation of request into ccw programs must meet the
3343 * following conditions:
3344 * - all idaws but the first and the last must address full pages
3345 * (or 2K blocks on 31-bit)
3346 * - the scope of a ccw and it's idal ends with the track boundaries
3348 idaws
= (unsigned long *) (cqr
->data
+ sizeof(struct PFX_eckd_data
));
3352 len_to_track_end
= 0;
3355 rq_for_each_segment(bv
, req
, iter
) {
3356 dst
= page_address(bv
.bv_page
) + bv
.bv_offset
;
3357 seg_len
= bv
.bv_len
;
3361 recoffs
= sector_div(trkid
, blk_per_trk
);
3362 count_to_trk_end
= blk_per_trk
- recoffs
;
3363 count
= min((last_rec
- recid
+ 1),
3364 (sector_t
)count_to_trk_end
);
3365 len_to_track_end
= count
* blksize
;
3366 ccw
[-1].flags
|= CCW_FLAG_CC
;
3367 ccw
->cmd_code
= cmd
;
3368 ccw
->count
= len_to_track_end
;
3369 ccw
->cda
= (__u32
)(addr_t
)idaws
;
3370 ccw
->flags
= CCW_FLAG_IDA
;
3374 /* first idaw for a ccw may start anywhere */
3378 /* If we start a new idaw, we must make sure that it
3379 * starts on an IDA_BLOCK_SIZE boundary.
3380 * If we continue an idaw, we must make sure that the
3381 * current segment begins where the so far accumulated
3385 if (__pa(dst
) & (IDA_BLOCK_SIZE
-1)) {
3386 dasd_sfree_request(cqr
, startdev
);
3387 return ERR_PTR(-ERANGE
);
3391 if ((idaw_dst
+ idaw_len
) != dst
) {
3392 dasd_sfree_request(cqr
, startdev
);
3393 return ERR_PTR(-ERANGE
);
3395 part_len
= min(seg_len
, len_to_track_end
);
3396 seg_len
-= part_len
;
3398 idaw_len
+= part_len
;
3399 len_to_track_end
-= part_len
;
3400 /* collected memory area ends on an IDA_BLOCK border,
3402 * idal_create_words will handle cases where idaw_len
3403 * is larger then IDA_BLOCK_SIZE
3405 if (!(__pa(idaw_dst
+ idaw_len
) & (IDA_BLOCK_SIZE
-1)))
3407 /* We also need to end the idaw at track end */
3408 if (!len_to_track_end
) {
3413 idaws
= idal_create_words(idaws
, idaw_dst
,
3422 if (blk_noretry_request(req
) ||
3423 block
->base
->features
& DASD_FEATURE_FAILFAST
)
3424 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
3425 cqr
->startdev
= startdev
;
3426 cqr
->memdev
= startdev
;
3428 cqr
->expires
= startdev
->default_expires
* HZ
; /* default 5 minutes */
3429 cqr
->lpm
= startdev
->path_data
.ppm
;
3430 cqr
->retries
= startdev
->default_retries
;
3431 cqr
->buildclk
= get_tod_clock();
3432 cqr
->status
= DASD_CQR_FILLED
;
3436 static int prepare_itcw(struct itcw
*itcw
,
3437 unsigned int trk
, unsigned int totrk
, int cmd
,
3438 struct dasd_device
*basedev
,
3439 struct dasd_device
*startdev
,
3440 unsigned int rec_on_trk
, int count
,
3441 unsigned int blksize
,
3442 unsigned int total_data_size
,
3444 unsigned int blk_per_trk
)
3446 struct PFX_eckd_data pfxdata
;
3447 struct dasd_eckd_private
*basepriv
, *startpriv
;
3448 struct DE_eckd_data
*dedata
;
3449 struct LRE_eckd_data
*lredata
;
3453 u16 heads
, beghead
, endhead
;
3461 /* setup prefix data */
3462 basepriv
= basedev
->private;
3463 startpriv
= startdev
->private;
3464 dedata
= &pfxdata
.define_extent
;
3465 lredata
= &pfxdata
.locate_record
;
3467 memset(&pfxdata
, 0, sizeof(pfxdata
));
3468 pfxdata
.format
= 1; /* PFX with LRE */
3469 pfxdata
.base_address
= basepriv
->ned
->unit_addr
;
3470 pfxdata
.base_lss
= basepriv
->ned
->ID
;
3471 pfxdata
.validity
.define_extent
= 1;
3473 /* private uid is kept up to date, conf_data may be outdated */
3474 if (startpriv
->uid
.type
!= UA_BASE_DEVICE
) {
3475 pfxdata
.validity
.verify_base
= 1;
3476 if (startpriv
->uid
.type
== UA_HYPER_PAV_ALIAS
)
3477 pfxdata
.validity
.hyper_pav
= 1;
3481 case DASD_ECKD_CCW_READ_TRACK_DATA
:
3482 dedata
->mask
.perm
= 0x1;
3483 dedata
->attributes
.operation
= basepriv
->attrib
.operation
;
3484 dedata
->blk_size
= blksize
;
3485 dedata
->ga_extended
|= 0x42;
3486 lredata
->operation
.orientation
= 0x0;
3487 lredata
->operation
.operation
= 0x0C;
3488 lredata
->auxiliary
.check_bytes
= 0x01;
3489 pfx_cmd
= DASD_ECKD_CCW_PFX_READ
;
3491 case DASD_ECKD_CCW_WRITE_TRACK_DATA
:
3492 dedata
->mask
.perm
= 0x02;
3493 dedata
->attributes
.operation
= basepriv
->attrib
.operation
;
3494 dedata
->blk_size
= blksize
;
3495 rc
= check_XRC_on_prefix(&pfxdata
, basedev
);
3496 dedata
->ga_extended
|= 0x42;
3497 lredata
->operation
.orientation
= 0x0;
3498 lredata
->operation
.operation
= 0x3F;
3499 lredata
->extended_operation
= 0x23;
3500 lredata
->auxiliary
.check_bytes
= 0x2;
3501 pfx_cmd
= DASD_ECKD_CCW_PFX
;
3503 case DASD_ECKD_CCW_READ_COUNT_MT
:
3504 dedata
->mask
.perm
= 0x1;
3505 dedata
->attributes
.operation
= DASD_BYPASS_CACHE
;
3506 dedata
->ga_extended
|= 0x42;
3507 dedata
->blk_size
= blksize
;
3508 lredata
->operation
.orientation
= 0x2;
3509 lredata
->operation
.operation
= 0x16;
3510 lredata
->auxiliary
.check_bytes
= 0x01;
3511 pfx_cmd
= DASD_ECKD_CCW_PFX_READ
;
3514 DBF_DEV_EVENT(DBF_ERR
, basedev
,
3515 "prepare itcw, unknown opcode 0x%x", cmd
);
3522 dedata
->attributes
.mode
= 0x3; /* ECKD */
3524 heads
= basepriv
->rdc_data
.trk_per_cyl
;
3525 begcyl
= trk
/ heads
;
3526 beghead
= trk
% heads
;
3527 endcyl
= totrk
/ heads
;
3528 endhead
= totrk
% heads
;
3530 /* check for sequential prestage - enhance cylinder range */
3531 if (dedata
->attributes
.operation
== DASD_SEQ_PRESTAGE
||
3532 dedata
->attributes
.operation
== DASD_SEQ_ACCESS
) {
3534 if (endcyl
+ basepriv
->attrib
.nr_cyl
< basepriv
->real_cyl
)
3535 endcyl
+= basepriv
->attrib
.nr_cyl
;
3537 endcyl
= (basepriv
->real_cyl
- 1);
3540 set_ch_t(&dedata
->beg_ext
, begcyl
, beghead
);
3541 set_ch_t(&dedata
->end_ext
, endcyl
, endhead
);
3543 dedata
->ep_format
= 0x20; /* records per track is valid */
3544 dedata
->ep_rec_per_track
= blk_per_trk
;
3547 switch (basepriv
->rdc_data
.dev_type
) {
3549 dn
= ceil_quot(blksize
+ 6, 232);
3550 d
= 9 + ceil_quot(blksize
+ 6 * (dn
+ 1), 34);
3551 sector
= (49 + (rec_on_trk
- 1) * (10 + d
)) / 8;
3554 d
= 7 + ceil_quot(blksize
+ 12, 32);
3555 sector
= (39 + (rec_on_trk
- 1) * (8 + d
)) / 7;
3560 if (cmd
== DASD_ECKD_CCW_READ_COUNT_MT
) {
3561 lredata
->auxiliary
.length_valid
= 0;
3562 lredata
->auxiliary
.length_scope
= 0;
3563 lredata
->sector
= 0xff;
3565 lredata
->auxiliary
.length_valid
= 1;
3566 lredata
->auxiliary
.length_scope
= 1;
3567 lredata
->sector
= sector
;
3569 lredata
->auxiliary
.imbedded_ccw_valid
= 1;
3570 lredata
->length
= tlf
;
3571 lredata
->imbedded_ccw
= cmd
;
3572 lredata
->count
= count
;
3573 set_ch_t(&lredata
->seek_addr
, begcyl
, beghead
);
3574 lredata
->search_arg
.cyl
= lredata
->seek_addr
.cyl
;
3575 lredata
->search_arg
.head
= lredata
->seek_addr
.head
;
3576 lredata
->search_arg
.record
= rec_on_trk
;
3578 dcw
= itcw_add_dcw(itcw
, pfx_cmd
, 0,
3579 &pfxdata
, sizeof(pfxdata
), total_data_size
);
3580 return PTR_RET(dcw
);
3583 static struct dasd_ccw_req
*dasd_eckd_build_cp_tpm_track(
3584 struct dasd_device
*startdev
,
3585 struct dasd_block
*block
,
3586 struct request
*req
,
3591 unsigned int first_offs
,
3592 unsigned int last_offs
,
3593 unsigned int blk_per_trk
,
3594 unsigned int blksize
)
3596 struct dasd_ccw_req
*cqr
;
3597 struct req_iterator iter
;
3600 unsigned int trkcount
, ctidaw
;
3602 struct dasd_device
*basedev
;
3605 struct tidaw
*last_tidaw
= NULL
;
3609 unsigned int seg_len
, part_len
, len_to_track_end
;
3610 unsigned char new_track
;
3611 sector_t recid
, trkid
;
3613 unsigned int count
, count_to_trk_end
;
3616 basedev
= block
->base
;
3617 if (rq_data_dir(req
) == READ
) {
3618 cmd
= DASD_ECKD_CCW_READ_TRACK_DATA
;
3619 itcw_op
= ITCW_OP_READ
;
3620 } else if (rq_data_dir(req
) == WRITE
) {
3621 cmd
= DASD_ECKD_CCW_WRITE_TRACK_DATA
;
3622 itcw_op
= ITCW_OP_WRITE
;
3624 return ERR_PTR(-EINVAL
);
3626 /* trackbased I/O needs address all memory via TIDAWs,
3627 * not just for 64 bit addresses. This allows us to map
3628 * each segment directly to one tidaw.
3629 * In the case of write requests, additional tidaws may
3630 * be needed when a segment crosses a track boundary.
3632 trkcount
= last_trk
- first_trk
+ 1;
3634 rq_for_each_segment(bv
, req
, iter
) {
3637 if (rq_data_dir(req
) == WRITE
)
3638 ctidaw
+= (last_trk
- first_trk
);
3640 /* Allocate the ccw request. */
3641 itcw_size
= itcw_calc_size(0, ctidaw
, 0);
3642 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 0, itcw_size
, startdev
);
3646 /* transfer length factor: how many bytes to read from the last track */
3647 if (first_trk
== last_trk
)
3648 tlf
= last_offs
- first_offs
+ 1;
3650 tlf
= last_offs
+ 1;
3653 itcw
= itcw_init(cqr
->data
, itcw_size
, itcw_op
, 0, ctidaw
, 0);
3658 cqr
->cpaddr
= itcw_get_tcw(itcw
);
3659 if (prepare_itcw(itcw
, first_trk
, last_trk
,
3660 cmd
, basedev
, startdev
,
3663 (last_rec
- first_rec
+ 1) * blksize
,
3664 tlf
, blk_per_trk
) == -EAGAIN
) {
3665 /* Clock not in sync and XRC is enabled.
3671 len_to_track_end
= 0;
3673 * A tidaw can address 4k of memory, but must not cross page boundaries
3674 * We can let the block layer handle this by setting
3675 * blk_queue_segment_boundary to page boundaries and
3676 * blk_max_segment_size to page size when setting up the request queue.
3677 * For write requests, a TIDAW must not cross track boundaries, because
3678 * we have to set the CBC flag on the last tidaw for each track.
3680 if (rq_data_dir(req
) == WRITE
) {
3683 rq_for_each_segment(bv
, req
, iter
) {
3684 dst
= page_address(bv
.bv_page
) + bv
.bv_offset
;
3685 seg_len
= bv
.bv_len
;
3689 offs
= sector_div(trkid
, blk_per_trk
);
3690 count_to_trk_end
= blk_per_trk
- offs
;
3691 count
= min((last_rec
- recid
+ 1),
3692 (sector_t
)count_to_trk_end
);
3693 len_to_track_end
= count
* blksize
;
3697 part_len
= min(seg_len
, len_to_track_end
);
3698 seg_len
-= part_len
;
3699 len_to_track_end
-= part_len
;
3700 /* We need to end the tidaw at track end */
3701 if (!len_to_track_end
) {
3703 tidaw_flags
= TIDAW_FLAGS_INSERT_CBC
;
3706 last_tidaw
= itcw_add_tidaw(itcw
, tidaw_flags
,
3708 if (IS_ERR(last_tidaw
)) {
3716 rq_for_each_segment(bv
, req
, iter
) {
3717 dst
= page_address(bv
.bv_page
) + bv
.bv_offset
;
3718 last_tidaw
= itcw_add_tidaw(itcw
, 0x00,
3720 if (IS_ERR(last_tidaw
)) {
3726 last_tidaw
->flags
|= TIDAW_FLAGS_LAST
;
3727 last_tidaw
->flags
&= ~TIDAW_FLAGS_INSERT_CBC
;
3728 itcw_finalize(itcw
);
3730 if (blk_noretry_request(req
) ||
3731 block
->base
->features
& DASD_FEATURE_FAILFAST
)
3732 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
3734 cqr
->startdev
= startdev
;
3735 cqr
->memdev
= startdev
;
3737 cqr
->expires
= startdev
->default_expires
* HZ
; /* default 5 minutes */
3738 cqr
->lpm
= startdev
->path_data
.ppm
;
3739 cqr
->retries
= startdev
->default_retries
;
3740 cqr
->buildclk
= get_tod_clock();
3741 cqr
->status
= DASD_CQR_FILLED
;
3744 dasd_sfree_request(cqr
, startdev
);
3745 return ERR_PTR(ret
);
3748 static struct dasd_ccw_req
*dasd_eckd_build_cp(struct dasd_device
*startdev
,
3749 struct dasd_block
*block
,
3750 struct request
*req
)
3755 struct dasd_eckd_private
*private;
3756 struct dasd_device
*basedev
;
3757 sector_t first_rec
, last_rec
;
3758 sector_t first_trk
, last_trk
;
3759 unsigned int first_offs
, last_offs
;
3760 unsigned int blk_per_trk
, blksize
;
3762 unsigned int data_size
;
3763 struct dasd_ccw_req
*cqr
;
3765 basedev
= block
->base
;
3766 private = basedev
->private;
3768 /* Calculate number of blocks/records per track. */
3769 blksize
= block
->bp_block
;
3770 blk_per_trk
= recs_per_track(&private->rdc_data
, 0, blksize
);
3771 if (blk_per_trk
== 0)
3772 return ERR_PTR(-EINVAL
);
3773 /* Calculate record id of first and last block. */
3774 first_rec
= first_trk
= blk_rq_pos(req
) >> block
->s2b_shift
;
3775 first_offs
= sector_div(first_trk
, blk_per_trk
);
3776 last_rec
= last_trk
=
3777 (blk_rq_pos(req
) + blk_rq_sectors(req
) - 1) >> block
->s2b_shift
;
3778 last_offs
= sector_div(last_trk
, blk_per_trk
);
3779 cdlspecial
= (private->uses_cdl
&& first_rec
< 2*blk_per_trk
);
3781 fcx_multitrack
= private->features
.feature
[40] & 0x20;
3782 data_size
= blk_rq_bytes(req
);
3783 if (data_size
% blksize
)
3784 return ERR_PTR(-EINVAL
);
3785 /* tpm write request add CBC data on each track boundary */
3786 if (rq_data_dir(req
) == WRITE
)
3787 data_size
+= (last_trk
- first_trk
) * 4;
3789 /* is read track data and write track data in command mode supported? */
3790 cmdrtd
= private->features
.feature
[9] & 0x20;
3791 cmdwtd
= private->features
.feature
[12] & 0x40;
3792 use_prefix
= private->features
.feature
[8] & 0x01;
3795 if (cdlspecial
|| dasd_page_cache
) {
3796 /* do nothing, just fall through to the cmd mode single case */
3797 } else if ((data_size
<= private->fcx_max_data
)
3798 && (fcx_multitrack
|| (first_trk
== last_trk
))) {
3799 cqr
= dasd_eckd_build_cp_tpm_track(startdev
, block
, req
,
3800 first_rec
, last_rec
,
3801 first_trk
, last_trk
,
3802 first_offs
, last_offs
,
3803 blk_per_trk
, blksize
);
3804 if (IS_ERR(cqr
) && (PTR_ERR(cqr
) != -EAGAIN
) &&
3805 (PTR_ERR(cqr
) != -ENOMEM
))
3807 } else if (use_prefix
&&
3808 (((rq_data_dir(req
) == READ
) && cmdrtd
) ||
3809 ((rq_data_dir(req
) == WRITE
) && cmdwtd
))) {
3810 cqr
= dasd_eckd_build_cp_cmd_track(startdev
, block
, req
,
3811 first_rec
, last_rec
,
3812 first_trk
, last_trk
,
3813 first_offs
, last_offs
,
3814 blk_per_trk
, blksize
);
3815 if (IS_ERR(cqr
) && (PTR_ERR(cqr
) != -EAGAIN
) &&
3816 (PTR_ERR(cqr
) != -ENOMEM
))
3820 cqr
= dasd_eckd_build_cp_cmd_single(startdev
, block
, req
,
3821 first_rec
, last_rec
,
3822 first_trk
, last_trk
,
3823 first_offs
, last_offs
,
3824 blk_per_trk
, blksize
);
3828 static struct dasd_ccw_req
*dasd_raw_build_cp(struct dasd_device
*startdev
,
3829 struct dasd_block
*block
,
3830 struct request
*req
)
3832 unsigned long *idaws
;
3833 struct dasd_device
*basedev
;
3834 struct dasd_ccw_req
*cqr
;
3836 struct req_iterator iter
;
3840 unsigned int trkcount
;
3841 unsigned int seg_len
, len_to_track_end
;
3842 unsigned int first_offs
;
3843 unsigned int cidaw
, cplength
, datasize
;
3844 sector_t first_trk
, last_trk
, sectors
;
3845 sector_t start_padding_sectors
, end_sector_offset
, end_padding_sectors
;
3846 unsigned int pfx_datasize
;
3849 * raw track access needs to be mutiple of 64k and on 64k boundary
3850 * For read requests we can fix an incorrect alignment by padding
3851 * the request with dummy pages.
3853 start_padding_sectors
= blk_rq_pos(req
) % DASD_RAW_SECTORS_PER_TRACK
;
3854 end_sector_offset
= (blk_rq_pos(req
) + blk_rq_sectors(req
)) %
3855 DASD_RAW_SECTORS_PER_TRACK
;
3856 end_padding_sectors
= (DASD_RAW_SECTORS_PER_TRACK
- end_sector_offset
) %
3857 DASD_RAW_SECTORS_PER_TRACK
;
3858 basedev
= block
->base
;
3859 if ((start_padding_sectors
|| end_padding_sectors
) &&
3860 (rq_data_dir(req
) == WRITE
)) {
3861 DBF_DEV_EVENT(DBF_ERR
, basedev
,
3862 "raw write not track aligned (%lu,%lu) req %p",
3863 start_padding_sectors
, end_padding_sectors
, req
);
3864 cqr
= ERR_PTR(-EINVAL
);
3868 first_trk
= blk_rq_pos(req
) / DASD_RAW_SECTORS_PER_TRACK
;
3869 last_trk
= (blk_rq_pos(req
) + blk_rq_sectors(req
) - 1) /
3870 DASD_RAW_SECTORS_PER_TRACK
;
3871 trkcount
= last_trk
- first_trk
+ 1;
3874 if (rq_data_dir(req
) == READ
)
3875 cmd
= DASD_ECKD_CCW_READ_TRACK
;
3876 else if (rq_data_dir(req
) == WRITE
)
3877 cmd
= DASD_ECKD_CCW_WRITE_FULL_TRACK
;
3879 cqr
= ERR_PTR(-EINVAL
);
3884 * Raw track based I/O needs IDAWs for each page,
3885 * and not just for 64 bit addresses.
3887 cidaw
= trkcount
* DASD_RAW_BLOCK_PER_TRACK
;
3889 /* 1x prefix + one read/write ccw per track */
3890 cplength
= 1 + trkcount
;
3893 * struct PFX_eckd_data has up to 2 byte as extended parameter
3894 * this is needed for write full track and has to be mentioned
3896 * add 8 instead of 2 to keep 8 byte boundary
3898 pfx_datasize
= sizeof(struct PFX_eckd_data
) + 8;
3900 datasize
= pfx_datasize
+ cidaw
* sizeof(unsigned long long);
3902 /* Allocate the ccw request. */
3903 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, cplength
,
3904 datasize
, startdev
);
3909 if (prefix_LRE(ccw
++, cqr
->data
, first_trk
, last_trk
, cmd
,
3910 basedev
, startdev
, 1 /* format */, first_offs
+ 1,
3911 trkcount
, 0, 0) == -EAGAIN
) {
3912 /* Clock not in sync and XRC is enabled.
3915 dasd_sfree_request(cqr
, startdev
);
3916 cqr
= ERR_PTR(-EAGAIN
);
3920 idaws
= (unsigned long *)(cqr
->data
+ pfx_datasize
);
3921 len_to_track_end
= 0;
3922 if (start_padding_sectors
) {
3923 ccw
[-1].flags
|= CCW_FLAG_CC
;
3924 ccw
->cmd_code
= cmd
;
3925 /* maximum 3390 track size */
3927 /* 64k map to one track */
3928 len_to_track_end
= 65536 - start_padding_sectors
* 512;
3929 ccw
->cda
= (__u32
)(addr_t
)idaws
;
3930 ccw
->flags
|= CCW_FLAG_IDA
;
3931 ccw
->flags
|= CCW_FLAG_SLI
;
3933 for (sectors
= 0; sectors
< start_padding_sectors
; sectors
+= 8)
3934 idaws
= idal_create_words(idaws
, rawpadpage
, PAGE_SIZE
);
3936 rq_for_each_segment(bv
, req
, iter
) {
3937 dst
= page_address(bv
.bv_page
) + bv
.bv_offset
;
3938 seg_len
= bv
.bv_len
;
3939 if (cmd
== DASD_ECKD_CCW_READ_TRACK
)
3940 memset(dst
, 0, seg_len
);
3941 if (!len_to_track_end
) {
3942 ccw
[-1].flags
|= CCW_FLAG_CC
;
3943 ccw
->cmd_code
= cmd
;
3944 /* maximum 3390 track size */
3946 /* 64k map to one track */
3947 len_to_track_end
= 65536;
3948 ccw
->cda
= (__u32
)(addr_t
)idaws
;
3949 ccw
->flags
|= CCW_FLAG_IDA
;
3950 ccw
->flags
|= CCW_FLAG_SLI
;
3953 len_to_track_end
-= seg_len
;
3954 idaws
= idal_create_words(idaws
, dst
, seg_len
);
3956 for (sectors
= 0; sectors
< end_padding_sectors
; sectors
+= 8)
3957 idaws
= idal_create_words(idaws
, rawpadpage
, PAGE_SIZE
);
3958 if (blk_noretry_request(req
) ||
3959 block
->base
->features
& DASD_FEATURE_FAILFAST
)
3960 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
3961 cqr
->startdev
= startdev
;
3962 cqr
->memdev
= startdev
;
3964 cqr
->expires
= startdev
->default_expires
* HZ
;
3965 cqr
->lpm
= startdev
->path_data
.ppm
;
3966 cqr
->retries
= startdev
->default_retries
;
3967 cqr
->buildclk
= get_tod_clock();
3968 cqr
->status
= DASD_CQR_FILLED
;
3970 if (IS_ERR(cqr
) && PTR_ERR(cqr
) != -EAGAIN
)
3978 dasd_eckd_free_cp(struct dasd_ccw_req
*cqr
, struct request
*req
)
3980 struct dasd_eckd_private
*private;
3982 struct req_iterator iter
;
3985 unsigned int blksize
, blk_per_trk
, off
;
3989 if (!dasd_page_cache
)
3991 private = cqr
->block
->base
->private;
3992 blksize
= cqr
->block
->bp_block
;
3993 blk_per_trk
= recs_per_track(&private->rdc_data
, 0, blksize
);
3994 recid
= blk_rq_pos(req
) >> cqr
->block
->s2b_shift
;
3996 /* Skip over define extent & locate record. */
3998 if (private->uses_cdl
== 0 || recid
> 2*blk_per_trk
)
4000 rq_for_each_segment(bv
, req
, iter
) {
4001 dst
= page_address(bv
.bv_page
) + bv
.bv_offset
;
4002 for (off
= 0; off
< bv
.bv_len
; off
+= blksize
) {
4003 /* Skip locate record. */
4004 if (private->uses_cdl
&& recid
<= 2*blk_per_trk
)
4007 if (ccw
->flags
& CCW_FLAG_IDA
)
4008 cda
= *((char **)((addr_t
) ccw
->cda
));
4010 cda
= (char *)((addr_t
) ccw
->cda
);
4012 if (rq_data_dir(req
) == READ
)
4013 memcpy(dst
, cda
, bv
.bv_len
);
4014 kmem_cache_free(dasd_page_cache
,
4015 (void *)((addr_t
)cda
& PAGE_MASK
));
4024 status
= cqr
->status
== DASD_CQR_DONE
;
4025 dasd_sfree_request(cqr
, cqr
->memdev
);
4030 * Modify ccw/tcw in cqr so it can be started on a base device.
4032 * Note that this is not enough to restart the cqr!
4033 * Either reset cqr->startdev as well (summary unit check handling)
4034 * or restart via separate cqr (as in ERP handling).
4036 void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req
*cqr
)
4039 struct PFX_eckd_data
*pfxdata
;
4044 if (cqr
->cpmode
== 1) {
4046 tccb
= tcw_get_tccb(tcw
);
4047 dcw
= (struct dcw
*)&tccb
->tca
[0];
4048 pfxdata
= (struct PFX_eckd_data
*)&dcw
->cd
[0];
4049 pfxdata
->validity
.verify_base
= 0;
4050 pfxdata
->validity
.hyper_pav
= 0;
4053 pfxdata
= cqr
->data
;
4054 if (ccw
->cmd_code
== DASD_ECKD_CCW_PFX
) {
4055 pfxdata
->validity
.verify_base
= 0;
4056 pfxdata
->validity
.hyper_pav
= 0;
4061 #define DASD_ECKD_CHANQ_MAX_SIZE 4
4063 static struct dasd_ccw_req
*dasd_eckd_build_alias_cp(struct dasd_device
*base
,
4064 struct dasd_block
*block
,
4065 struct request
*req
)
4067 struct dasd_eckd_private
*private;
4068 struct dasd_device
*startdev
;
4069 unsigned long flags
;
4070 struct dasd_ccw_req
*cqr
;
4072 startdev
= dasd_alias_get_start_dev(base
);
4075 private = startdev
->private;
4076 if (private->count
>= DASD_ECKD_CHANQ_MAX_SIZE
)
4077 return ERR_PTR(-EBUSY
);
4079 spin_lock_irqsave(get_ccwdev_lock(startdev
->cdev
), flags
);
4081 if ((base
->features
& DASD_FEATURE_USERAW
))
4082 cqr
= dasd_raw_build_cp(startdev
, block
, req
);
4084 cqr
= dasd_eckd_build_cp(startdev
, block
, req
);
4087 spin_unlock_irqrestore(get_ccwdev_lock(startdev
->cdev
), flags
);
4091 static int dasd_eckd_free_alias_cp(struct dasd_ccw_req
*cqr
,
4092 struct request
*req
)
4094 struct dasd_eckd_private
*private;
4095 unsigned long flags
;
4097 spin_lock_irqsave(get_ccwdev_lock(cqr
->memdev
->cdev
), flags
);
4098 private = cqr
->memdev
->private;
4100 spin_unlock_irqrestore(get_ccwdev_lock(cqr
->memdev
->cdev
), flags
);
4101 return dasd_eckd_free_cp(cqr
, req
);
4105 dasd_eckd_fill_info(struct dasd_device
* device
,
4106 struct dasd_information2_t
* info
)
4108 struct dasd_eckd_private
*private = device
->private;
4110 info
->label_block
= 2;
4111 info
->FBA_layout
= private->uses_cdl
? 0 : 1;
4112 info
->format
= private->uses_cdl
? DASD_FORMAT_CDL
: DASD_FORMAT_LDL
;
4113 info
->characteristics_size
= sizeof(private->rdc_data
);
4114 memcpy(info
->characteristics
, &private->rdc_data
,
4115 sizeof(private->rdc_data
));
4116 info
->confdata_size
= min((unsigned long)private->conf_len
,
4117 sizeof(info
->configuration_data
));
4118 memcpy(info
->configuration_data
, private->conf_data
,
4119 info
->confdata_size
);
4124 * SECTION: ioctl functions for eckd devices.
4128 * Release device ioctl.
4129 * Buils a channel programm to releases a prior reserved
4130 * (see dasd_eckd_reserve) device.
4133 dasd_eckd_release(struct dasd_device
*device
)
4135 struct dasd_ccw_req
*cqr
;
4140 if (!capable(CAP_SYS_ADMIN
))
4144 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1, 32, device
);
4146 mutex_lock(&dasd_reserve_mutex
);
4148 cqr
= &dasd_reserve_req
->cqr
;
4149 memset(cqr
, 0, sizeof(*cqr
));
4150 memset(&dasd_reserve_req
->ccw
, 0,
4151 sizeof(dasd_reserve_req
->ccw
));
4152 cqr
->cpaddr
= &dasd_reserve_req
->ccw
;
4153 cqr
->data
= &dasd_reserve_req
->data
;
4154 cqr
->magic
= DASD_ECKD_MAGIC
;
4157 ccw
->cmd_code
= DASD_ECKD_CCW_RELEASE
;
4158 ccw
->flags
|= CCW_FLAG_SLI
;
4160 ccw
->cda
= (__u32
)(addr_t
) cqr
->data
;
4161 cqr
->startdev
= device
;
4162 cqr
->memdev
= device
;
4163 clear_bit(DASD_CQR_FLAGS_USE_ERP
, &cqr
->flags
);
4164 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
4165 cqr
->retries
= 2; /* set retry counter to enable basic ERP */
4166 cqr
->expires
= 2 * HZ
;
4167 cqr
->buildclk
= get_tod_clock();
4168 cqr
->status
= DASD_CQR_FILLED
;
4170 rc
= dasd_sleep_on_immediatly(cqr
);
4172 clear_bit(DASD_FLAG_IS_RESERVED
, &device
->flags
);
4175 mutex_unlock(&dasd_reserve_mutex
);
4177 dasd_sfree_request(cqr
, cqr
->memdev
);
4182 * Reserve device ioctl.
4183 * Options are set to 'synchronous wait for interrupt' and
4184 * 'timeout the request'. This leads to a terminate IO if
4185 * the interrupt is outstanding for a certain time.
4188 dasd_eckd_reserve(struct dasd_device
*device
)
4190 struct dasd_ccw_req
*cqr
;
4195 if (!capable(CAP_SYS_ADMIN
))
4199 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1, 32, device
);
4201 mutex_lock(&dasd_reserve_mutex
);
4203 cqr
= &dasd_reserve_req
->cqr
;
4204 memset(cqr
, 0, sizeof(*cqr
));
4205 memset(&dasd_reserve_req
->ccw
, 0,
4206 sizeof(dasd_reserve_req
->ccw
));
4207 cqr
->cpaddr
= &dasd_reserve_req
->ccw
;
4208 cqr
->data
= &dasd_reserve_req
->data
;
4209 cqr
->magic
= DASD_ECKD_MAGIC
;
4212 ccw
->cmd_code
= DASD_ECKD_CCW_RESERVE
;
4213 ccw
->flags
|= CCW_FLAG_SLI
;
4215 ccw
->cda
= (__u32
)(addr_t
) cqr
->data
;
4216 cqr
->startdev
= device
;
4217 cqr
->memdev
= device
;
4218 clear_bit(DASD_CQR_FLAGS_USE_ERP
, &cqr
->flags
);
4219 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
4220 cqr
->retries
= 2; /* set retry counter to enable basic ERP */
4221 cqr
->expires
= 2 * HZ
;
4222 cqr
->buildclk
= get_tod_clock();
4223 cqr
->status
= DASD_CQR_FILLED
;
4225 rc
= dasd_sleep_on_immediatly(cqr
);
4227 set_bit(DASD_FLAG_IS_RESERVED
, &device
->flags
);
4230 mutex_unlock(&dasd_reserve_mutex
);
4232 dasd_sfree_request(cqr
, cqr
->memdev
);
4237 * Steal lock ioctl - unconditional reserve device.
4238 * Buils a channel programm to break a device's reservation.
4239 * (unconditional reserve)
4242 dasd_eckd_steal_lock(struct dasd_device
*device
)
4244 struct dasd_ccw_req
*cqr
;
4249 if (!capable(CAP_SYS_ADMIN
))
4253 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1, 32, device
);
4255 mutex_lock(&dasd_reserve_mutex
);
4257 cqr
= &dasd_reserve_req
->cqr
;
4258 memset(cqr
, 0, sizeof(*cqr
));
4259 memset(&dasd_reserve_req
->ccw
, 0,
4260 sizeof(dasd_reserve_req
->ccw
));
4261 cqr
->cpaddr
= &dasd_reserve_req
->ccw
;
4262 cqr
->data
= &dasd_reserve_req
->data
;
4263 cqr
->magic
= DASD_ECKD_MAGIC
;
4266 ccw
->cmd_code
= DASD_ECKD_CCW_SLCK
;
4267 ccw
->flags
|= CCW_FLAG_SLI
;
4269 ccw
->cda
= (__u32
)(addr_t
) cqr
->data
;
4270 cqr
->startdev
= device
;
4271 cqr
->memdev
= device
;
4272 clear_bit(DASD_CQR_FLAGS_USE_ERP
, &cqr
->flags
);
4273 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
4274 cqr
->retries
= 2; /* set retry counter to enable basic ERP */
4275 cqr
->expires
= 2 * HZ
;
4276 cqr
->buildclk
= get_tod_clock();
4277 cqr
->status
= DASD_CQR_FILLED
;
4279 rc
= dasd_sleep_on_immediatly(cqr
);
4281 set_bit(DASD_FLAG_IS_RESERVED
, &device
->flags
);
4284 mutex_unlock(&dasd_reserve_mutex
);
4286 dasd_sfree_request(cqr
, cqr
->memdev
);
4291 * SNID - Sense Path Group ID
4292 * This ioctl may be used in situations where I/O is stalled due to
4293 * a reserve, so if the normal dasd_smalloc_request fails, we use the
4294 * preallocated dasd_reserve_req.
4296 static int dasd_eckd_snid(struct dasd_device
*device
,
4299 struct dasd_ccw_req
*cqr
;
4303 struct dasd_snid_ioctl_data usrparm
;
4305 if (!capable(CAP_SYS_ADMIN
))
4308 if (copy_from_user(&usrparm
, argp
, sizeof(usrparm
)))
4312 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1,
4313 sizeof(struct dasd_snid_data
), device
);
4315 mutex_lock(&dasd_reserve_mutex
);
4317 cqr
= &dasd_reserve_req
->cqr
;
4318 memset(cqr
, 0, sizeof(*cqr
));
4319 memset(&dasd_reserve_req
->ccw
, 0,
4320 sizeof(dasd_reserve_req
->ccw
));
4321 cqr
->cpaddr
= &dasd_reserve_req
->ccw
;
4322 cqr
->data
= &dasd_reserve_req
->data
;
4323 cqr
->magic
= DASD_ECKD_MAGIC
;
4326 ccw
->cmd_code
= DASD_ECKD_CCW_SNID
;
4327 ccw
->flags
|= CCW_FLAG_SLI
;
4329 ccw
->cda
= (__u32
)(addr_t
) cqr
->data
;
4330 cqr
->startdev
= device
;
4331 cqr
->memdev
= device
;
4332 clear_bit(DASD_CQR_FLAGS_USE_ERP
, &cqr
->flags
);
4333 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
4334 set_bit(DASD_CQR_ALLOW_SLOCK
, &cqr
->flags
);
4336 cqr
->expires
= 10 * HZ
;
4337 cqr
->buildclk
= get_tod_clock();
4338 cqr
->status
= DASD_CQR_FILLED
;
4339 cqr
->lpm
= usrparm
.path_mask
;
4341 rc
= dasd_sleep_on_immediatly(cqr
);
4342 /* verify that I/O processing didn't modify the path mask */
4343 if (!rc
&& usrparm
.path_mask
&& (cqr
->lpm
!= usrparm
.path_mask
))
4346 usrparm
.data
= *((struct dasd_snid_data
*)cqr
->data
);
4347 if (copy_to_user(argp
, &usrparm
, sizeof(usrparm
)))
4352 mutex_unlock(&dasd_reserve_mutex
);
4354 dasd_sfree_request(cqr
, cqr
->memdev
);
4359 * Read performance statistics
4362 dasd_eckd_performance(struct dasd_device
*device
, void __user
*argp
)
4364 struct dasd_psf_prssd_data
*prssdp
;
4365 struct dasd_rssd_perf_stats_t
*stats
;
4366 struct dasd_ccw_req
*cqr
;
4370 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1 /* PSF */ + 1 /* RSSD */,
4371 (sizeof(struct dasd_psf_prssd_data
) +
4372 sizeof(struct dasd_rssd_perf_stats_t
)),
4375 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
4376 "Could not allocate initialization request");
4377 return PTR_ERR(cqr
);
4379 cqr
->startdev
= device
;
4380 cqr
->memdev
= device
;
4382 clear_bit(DASD_CQR_FLAGS_USE_ERP
, &cqr
->flags
);
4383 cqr
->expires
= 10 * HZ
;
4385 /* Prepare for Read Subsystem Data */
4386 prssdp
= (struct dasd_psf_prssd_data
*) cqr
->data
;
4387 memset(prssdp
, 0, sizeof(struct dasd_psf_prssd_data
));
4388 prssdp
->order
= PSF_ORDER_PRSSD
;
4389 prssdp
->suborder
= 0x01; /* Performance Statistics */
4390 prssdp
->varies
[1] = 0x01; /* Perf Statistics for the Subsystem */
4393 ccw
->cmd_code
= DASD_ECKD_CCW_PSF
;
4394 ccw
->count
= sizeof(struct dasd_psf_prssd_data
);
4395 ccw
->flags
|= CCW_FLAG_CC
;
4396 ccw
->cda
= (__u32
)(addr_t
) prssdp
;
4398 /* Read Subsystem Data - Performance Statistics */
4399 stats
= (struct dasd_rssd_perf_stats_t
*) (prssdp
+ 1);
4400 memset(stats
, 0, sizeof(struct dasd_rssd_perf_stats_t
));
4403 ccw
->cmd_code
= DASD_ECKD_CCW_RSSD
;
4404 ccw
->count
= sizeof(struct dasd_rssd_perf_stats_t
);
4405 ccw
->cda
= (__u32
)(addr_t
) stats
;
4407 cqr
->buildclk
= get_tod_clock();
4408 cqr
->status
= DASD_CQR_FILLED
;
4409 rc
= dasd_sleep_on(cqr
);
4411 prssdp
= (struct dasd_psf_prssd_data
*) cqr
->data
;
4412 stats
= (struct dasd_rssd_perf_stats_t
*) (prssdp
+ 1);
4413 if (copy_to_user(argp
, stats
,
4414 sizeof(struct dasd_rssd_perf_stats_t
)))
4417 dasd_sfree_request(cqr
, cqr
->memdev
);
4422 * Get attributes (cache operations)
4423 * Returnes the cache attributes used in Define Extend (DE).
4426 dasd_eckd_get_attrib(struct dasd_device
*device
, void __user
*argp
)
4428 struct dasd_eckd_private
*private = device
->private;
4429 struct attrib_data_t attrib
= private->attrib
;
4432 if (!capable(CAP_SYS_ADMIN
))
4438 if (copy_to_user(argp
, (long *) &attrib
,
4439 sizeof(struct attrib_data_t
)))
4446 * Set attributes (cache operations)
4447 * Stores the attributes for cache operation to be used in Define Extend (DE).
4450 dasd_eckd_set_attrib(struct dasd_device
*device
, void __user
*argp
)
4452 struct dasd_eckd_private
*private = device
->private;
4453 struct attrib_data_t attrib
;
4455 if (!capable(CAP_SYS_ADMIN
))
4460 if (copy_from_user(&attrib
, argp
, sizeof(struct attrib_data_t
)))
4462 private->attrib
= attrib
;
4464 dev_info(&device
->cdev
->dev
,
4465 "The DASD cache mode was set to %x (%i cylinder prestage)\n",
4466 private->attrib
.operation
, private->attrib
.nr_cyl
);
4471 * Issue syscall I/O to EMC Symmetrix array.
4472 * CCWs are PSF and RSSD
4474 static int dasd_symm_io(struct dasd_device
*device
, void __user
*argp
)
4476 struct dasd_symmio_parms usrparm
;
4477 char *psf_data
, *rssd_result
;
4478 struct dasd_ccw_req
*cqr
;
4483 if (!capable(CAP_SYS_ADMIN
) && !capable(CAP_SYS_RAWIO
))
4487 /* Copy parms from caller */
4489 if (copy_from_user(&usrparm
, argp
, sizeof(usrparm
)))
4491 if (is_compat_task()) {
4492 /* Make sure pointers are sane even on 31 bit. */
4494 if ((usrparm
.psf_data
>> 32) != 0)
4496 if ((usrparm
.rssd_result
>> 32) != 0)
4498 usrparm
.psf_data
&= 0x7fffffffULL
;
4499 usrparm
.rssd_result
&= 0x7fffffffULL
;
4501 /* alloc I/O data area */
4502 psf_data
= kzalloc(usrparm
.psf_data_len
, GFP_KERNEL
| GFP_DMA
);
4503 rssd_result
= kzalloc(usrparm
.rssd_result_len
, GFP_KERNEL
| GFP_DMA
);
4504 if (!psf_data
|| !rssd_result
) {
4509 /* get syscall header from user space */
4511 if (copy_from_user(psf_data
,
4512 (void __user
*)(unsigned long) usrparm
.psf_data
,
4513 usrparm
.psf_data_len
))
4518 /* setup CCWs for PSF + RSSD */
4519 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 2 , 0, device
);
4521 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
4522 "Could not allocate initialization request");
4527 cqr
->startdev
= device
;
4528 cqr
->memdev
= device
;
4530 cqr
->expires
= 10 * HZ
;
4531 cqr
->buildclk
= get_tod_clock();
4532 cqr
->status
= DASD_CQR_FILLED
;
4534 /* Build the ccws */
4538 ccw
->cmd_code
= DASD_ECKD_CCW_PSF
;
4539 ccw
->count
= usrparm
.psf_data_len
;
4540 ccw
->flags
|= CCW_FLAG_CC
;
4541 ccw
->cda
= (__u32
)(addr_t
) psf_data
;
4546 ccw
->cmd_code
= DASD_ECKD_CCW_RSSD
;
4547 ccw
->count
= usrparm
.rssd_result_len
;
4548 ccw
->flags
= CCW_FLAG_SLI
;
4549 ccw
->cda
= (__u32
)(addr_t
) rssd_result
;
4551 rc
= dasd_sleep_on(cqr
);
4556 if (copy_to_user((void __user
*)(unsigned long) usrparm
.rssd_result
,
4557 rssd_result
, usrparm
.rssd_result_len
))
4562 dasd_sfree_request(cqr
, cqr
->memdev
);
4567 DBF_DEV_EVENT(DBF_WARNING
, device
,
4568 "Symmetrix ioctl (0x%02x 0x%02x): rc=%d",
4569 (int) psf0
, (int) psf1
, rc
);
4574 dasd_eckd_ioctl(struct dasd_block
*block
, unsigned int cmd
, void __user
*argp
)
4576 struct dasd_device
*device
= block
->base
;
4580 return dasd_eckd_get_attrib(device
, argp
);
4582 return dasd_eckd_set_attrib(device
, argp
);
4584 return dasd_eckd_performance(device
, argp
);
4586 return dasd_eckd_release(device
);
4588 return dasd_eckd_reserve(device
);
4590 return dasd_eckd_steal_lock(device
);
4592 return dasd_eckd_snid(device
, argp
);
4594 return dasd_symm_io(device
, argp
);
4601 * Dump the range of CCWs into 'page' buffer
4602 * and return number of printed chars.
4605 dasd_eckd_dump_ccw_range(struct ccw1
*from
, struct ccw1
*to
, char *page
)
4611 while (from
<= to
) {
4612 len
+= sprintf(page
+ len
, PRINTK_HEADER
4613 " CCW %p: %08X %08X DAT:",
4614 from
, ((int *) from
)[0], ((int *) from
)[1]);
4616 /* get pointer to data (consider IDALs) */
4617 if (from
->flags
& CCW_FLAG_IDA
)
4618 datap
= (char *) *((addr_t
*) (addr_t
) from
->cda
);
4620 datap
= (char *) ((addr_t
) from
->cda
);
4622 /* dump data (max 32 bytes) */
4623 for (count
= 0; count
< from
->count
&& count
< 32; count
++) {
4624 if (count
% 8 == 0) len
+= sprintf(page
+ len
, " ");
4625 if (count
% 4 == 0) len
+= sprintf(page
+ len
, " ");
4626 len
+= sprintf(page
+ len
, "%02x", datap
[count
]);
4628 len
+= sprintf(page
+ len
, "\n");
4635 dasd_eckd_dump_sense_dbf(struct dasd_device
*device
, struct irb
*irb
,
4641 sense
= (u64
*) dasd_get_sense(irb
);
4642 stat
= (u64
*) &irb
->scsw
;
4644 DBF_DEV_EVENT(DBF_EMERG
, device
, "%s: %016llx %08x : "
4645 "%016llx %016llx %016llx %016llx",
4646 reason
, *stat
, *((u32
*) (stat
+ 1)),
4647 sense
[0], sense
[1], sense
[2], sense
[3]);
4649 DBF_DEV_EVENT(DBF_EMERG
, device
, "%s: %016llx %08x : %s",
4650 reason
, *stat
, *((u32
*) (stat
+ 1)),
4656 * Print sense data and related channel program.
4657 * Parts are printed because printk buffer is only 1024 bytes.
4659 static void dasd_eckd_dump_sense_ccw(struct dasd_device
*device
,
4660 struct dasd_ccw_req
*req
, struct irb
*irb
)
4663 struct ccw1
*first
, *last
, *fail
, *from
, *to
;
4666 page
= (char *) get_zeroed_page(GFP_ATOMIC
);
4668 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
4669 "No memory to dump sense data\n");
4672 /* dump the sense data */
4673 len
= sprintf(page
, PRINTK_HEADER
4674 " I/O status report for device %s:\n",
4675 dev_name(&device
->cdev
->dev
));
4676 len
+= sprintf(page
+ len
, PRINTK_HEADER
4677 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X "
4679 req
, scsw_cc(&irb
->scsw
), scsw_fctl(&irb
->scsw
),
4680 scsw_actl(&irb
->scsw
), scsw_stctl(&irb
->scsw
),
4681 scsw_dstat(&irb
->scsw
), scsw_cstat(&irb
->scsw
),
4682 req
? req
->intrc
: 0);
4683 len
+= sprintf(page
+ len
, PRINTK_HEADER
4684 " device %s: Failing CCW: %p\n",
4685 dev_name(&device
->cdev
->dev
),
4686 (void *) (addr_t
) irb
->scsw
.cmd
.cpa
);
4687 if (irb
->esw
.esw0
.erw
.cons
) {
4688 for (sl
= 0; sl
< 4; sl
++) {
4689 len
+= sprintf(page
+ len
, PRINTK_HEADER
4690 " Sense(hex) %2d-%2d:",
4691 (8 * sl
), ((8 * sl
) + 7));
4693 for (sct
= 0; sct
< 8; sct
++) {
4694 len
+= sprintf(page
+ len
, " %02x",
4695 irb
->ecw
[8 * sl
+ sct
]);
4697 len
+= sprintf(page
+ len
, "\n");
4700 if (irb
->ecw
[27] & DASD_SENSE_BIT_0
) {
4701 /* 24 Byte Sense Data */
4702 sprintf(page
+ len
, PRINTK_HEADER
4703 " 24 Byte: %x MSG %x, "
4704 "%s MSGb to SYSOP\n",
4705 irb
->ecw
[7] >> 4, irb
->ecw
[7] & 0x0f,
4706 irb
->ecw
[1] & 0x10 ? "" : "no");
4708 /* 32 Byte Sense Data */
4709 sprintf(page
+ len
, PRINTK_HEADER
4710 " 32 Byte: Format: %x "
4711 "Exception class %x\n",
4712 irb
->ecw
[6] & 0x0f, irb
->ecw
[22] >> 4);
4715 sprintf(page
+ len
, PRINTK_HEADER
4716 " SORRY - NO VALID SENSE AVAILABLE\n");
4718 printk(KERN_ERR
"%s", page
);
4721 /* req == NULL for unsolicited interrupts */
4722 /* dump the Channel Program (max 140 Bytes per line) */
4723 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */
4724 first
= req
->cpaddr
;
4725 for (last
= first
; last
->flags
& (CCW_FLAG_CC
| CCW_FLAG_DC
); last
++);
4726 to
= min(first
+ 6, last
);
4727 len
= sprintf(page
, PRINTK_HEADER
4728 " Related CP in req: %p\n", req
);
4729 dasd_eckd_dump_ccw_range(first
, to
, page
+ len
);
4730 printk(KERN_ERR
"%s", page
);
4732 /* print failing CCW area (maximum 4) */
4733 /* scsw->cda is either valid or zero */
4736 fail
= (struct ccw1
*)(addr_t
)
4737 irb
->scsw
.cmd
.cpa
; /* failing CCW */
4738 if (from
< fail
- 2) {
4739 from
= fail
- 2; /* there is a gap - print header */
4740 len
+= sprintf(page
, PRINTK_HEADER
"......\n");
4742 to
= min(fail
+ 1, last
);
4743 len
+= dasd_eckd_dump_ccw_range(from
, to
, page
+ len
);
4745 /* print last CCWs (maximum 2) */
4746 from
= max(from
, ++to
);
4747 if (from
< last
- 1) {
4748 from
= last
- 1; /* there is a gap - print header */
4749 len
+= sprintf(page
+ len
, PRINTK_HEADER
"......\n");
4751 len
+= dasd_eckd_dump_ccw_range(from
, last
, page
+ len
);
4753 printk(KERN_ERR
"%s", page
);
4755 free_page((unsigned long) page
);
4760 * Print sense data from a tcw.
4762 static void dasd_eckd_dump_sense_tcw(struct dasd_device
*device
,
4763 struct dasd_ccw_req
*req
, struct irb
*irb
)
4766 int len
, sl
, sct
, residual
;
4770 page
= (char *) get_zeroed_page(GFP_ATOMIC
);
4772 DBF_DEV_EVENT(DBF_WARNING
, device
, " %s",
4773 "No memory to dump sense data");
4776 /* dump the sense data */
4777 len
= sprintf(page
, PRINTK_HEADER
4778 " I/O status report for device %s:\n",
4779 dev_name(&device
->cdev
->dev
));
4780 len
+= sprintf(page
+ len
, PRINTK_HEADER
4781 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X "
4782 "CS:%02X fcxs:%02X schxs:%02X RC:%d\n",
4783 req
, scsw_cc(&irb
->scsw
), scsw_fctl(&irb
->scsw
),
4784 scsw_actl(&irb
->scsw
), scsw_stctl(&irb
->scsw
),
4785 scsw_dstat(&irb
->scsw
), scsw_cstat(&irb
->scsw
),
4786 irb
->scsw
.tm
.fcxs
, irb
->scsw
.tm
.schxs
,
4787 req
? req
->intrc
: 0);
4788 len
+= sprintf(page
+ len
, PRINTK_HEADER
4789 " device %s: Failing TCW: %p\n",
4790 dev_name(&device
->cdev
->dev
),
4791 (void *) (addr_t
) irb
->scsw
.tm
.tcw
);
4795 if (irb
->scsw
.tm
.tcw
&& (irb
->scsw
.tm
.fcxs
& 0x01))
4797 (struct tcw
*)(unsigned long)irb
->scsw
.tm
.tcw
);
4800 len
+= sprintf(page
+ len
, PRINTK_HEADER
4801 " tsb->length %d\n", tsb
->length
);
4802 len
+= sprintf(page
+ len
, PRINTK_HEADER
4803 " tsb->flags %x\n", tsb
->flags
);
4804 len
+= sprintf(page
+ len
, PRINTK_HEADER
4805 " tsb->dcw_offset %d\n", tsb
->dcw_offset
);
4806 len
+= sprintf(page
+ len
, PRINTK_HEADER
4807 " tsb->count %d\n", tsb
->count
);
4808 residual
= tsb
->count
- 28;
4809 len
+= sprintf(page
+ len
, PRINTK_HEADER
4810 " residual %d\n", residual
);
4812 switch (tsb
->flags
& 0x07) {
4813 case 1: /* tsa_iostat */
4814 len
+= sprintf(page
+ len
, PRINTK_HEADER
4815 " tsb->tsa.iostat.dev_time %d\n",
4816 tsb
->tsa
.iostat
.dev_time
);
4817 len
+= sprintf(page
+ len
, PRINTK_HEADER
4818 " tsb->tsa.iostat.def_time %d\n",
4819 tsb
->tsa
.iostat
.def_time
);
4820 len
+= sprintf(page
+ len
, PRINTK_HEADER
4821 " tsb->tsa.iostat.queue_time %d\n",
4822 tsb
->tsa
.iostat
.queue_time
);
4823 len
+= sprintf(page
+ len
, PRINTK_HEADER
4824 " tsb->tsa.iostat.dev_busy_time %d\n",
4825 tsb
->tsa
.iostat
.dev_busy_time
);
4826 len
+= sprintf(page
+ len
, PRINTK_HEADER
4827 " tsb->tsa.iostat.dev_act_time %d\n",
4828 tsb
->tsa
.iostat
.dev_act_time
);
4829 sense
= tsb
->tsa
.iostat
.sense
;
4831 case 2: /* ts_ddpc */
4832 len
+= sprintf(page
+ len
, PRINTK_HEADER
4833 " tsb->tsa.ddpc.rc %d\n", tsb
->tsa
.ddpc
.rc
);
4834 for (sl
= 0; sl
< 2; sl
++) {
4835 len
+= sprintf(page
+ len
, PRINTK_HEADER
4836 " tsb->tsa.ddpc.rcq %2d-%2d: ",
4837 (8 * sl
), ((8 * sl
) + 7));
4838 rcq
= tsb
->tsa
.ddpc
.rcq
;
4839 for (sct
= 0; sct
< 8; sct
++) {
4840 len
+= sprintf(page
+ len
, " %02x",
4843 len
+= sprintf(page
+ len
, "\n");
4845 sense
= tsb
->tsa
.ddpc
.sense
;
4847 case 3: /* tsa_intrg */
4848 len
+= sprintf(page
+ len
, PRINTK_HEADER
4849 " tsb->tsa.intrg.: not supportet yet\n");
4854 for (sl
= 0; sl
< 4; sl
++) {
4855 len
+= sprintf(page
+ len
, PRINTK_HEADER
4856 " Sense(hex) %2d-%2d:",
4857 (8 * sl
), ((8 * sl
) + 7));
4858 for (sct
= 0; sct
< 8; sct
++) {
4859 len
+= sprintf(page
+ len
, " %02x",
4860 sense
[8 * sl
+ sct
]);
4862 len
+= sprintf(page
+ len
, "\n");
4865 if (sense
[27] & DASD_SENSE_BIT_0
) {
4866 /* 24 Byte Sense Data */
4867 sprintf(page
+ len
, PRINTK_HEADER
4868 " 24 Byte: %x MSG %x, "
4869 "%s MSGb to SYSOP\n",
4870 sense
[7] >> 4, sense
[7] & 0x0f,
4871 sense
[1] & 0x10 ? "" : "no");
4873 /* 32 Byte Sense Data */
4874 sprintf(page
+ len
, PRINTK_HEADER
4875 " 32 Byte: Format: %x "
4876 "Exception class %x\n",
4877 sense
[6] & 0x0f, sense
[22] >> 4);
4880 sprintf(page
+ len
, PRINTK_HEADER
4881 " SORRY - NO VALID SENSE AVAILABLE\n");
4884 sprintf(page
+ len
, PRINTK_HEADER
4885 " SORRY - NO TSB DATA AVAILABLE\n");
4887 printk(KERN_ERR
"%s", page
);
4888 free_page((unsigned long) page
);
4891 static void dasd_eckd_dump_sense(struct dasd_device
*device
,
4892 struct dasd_ccw_req
*req
, struct irb
*irb
)
4894 u8
*sense
= dasd_get_sense(irb
);
4896 if (scsw_is_tm(&irb
->scsw
)) {
4898 * In some cases the 'File Protected' or 'Incorrect Length'
4899 * error might be expected and log messages shouldn't be written
4900 * then. Check if the according suppress bit is set.
4902 if (sense
&& (sense
[1] & SNS1_FILE_PROTECTED
) &&
4903 test_bit(DASD_CQR_SUPPRESS_FP
, &req
->flags
))
4905 if (scsw_cstat(&irb
->scsw
) == 0x40 &&
4906 test_bit(DASD_CQR_SUPPRESS_IL
, &req
->flags
))
4909 dasd_eckd_dump_sense_tcw(device
, req
, irb
);
4912 * In some cases the 'No Record Found' error might be expected
4913 * and log messages shouldn't be written then. Check if the
4914 * according suppress bit is set.
4916 if (sense
&& sense
[1] & SNS1_NO_REC_FOUND
&&
4917 test_bit(DASD_CQR_SUPPRESS_NRF
, &req
->flags
))
4920 dasd_eckd_dump_sense_ccw(device
, req
, irb
);
4924 static int dasd_eckd_pm_freeze(struct dasd_device
*device
)
4927 * the device should be disconnected from our LCU structure
4928 * on restore we will reconnect it and reread LCU specific
4929 * information like PAV support that might have changed
4931 dasd_alias_remove_device(device
);
4932 dasd_alias_disconnect_device_from_lcu(device
);
4937 static int dasd_eckd_restore_device(struct dasd_device
*device
)
4939 struct dasd_eckd_private
*private = device
->private;
4940 struct dasd_eckd_characteristics temp_rdc_data
;
4942 struct dasd_uid temp_uid
;
4943 unsigned long flags
;
4944 unsigned long cqr_flags
= 0;
4946 /* Read Configuration Data */
4947 rc
= dasd_eckd_read_conf(device
);
4949 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
,
4950 "Read configuration data failed, rc=%d", rc
);
4954 dasd_eckd_get_uid(device
, &temp_uid
);
4955 /* Generate device unique id */
4956 rc
= dasd_eckd_generate_uid(device
);
4957 spin_lock_irqsave(get_ccwdev_lock(device
->cdev
), flags
);
4958 if (memcmp(&private->uid
, &temp_uid
, sizeof(struct dasd_uid
)) != 0)
4959 dev_err(&device
->cdev
->dev
, "The UID of the DASD has "
4961 spin_unlock_irqrestore(get_ccwdev_lock(device
->cdev
), flags
);
4965 /* register lcu with alias handling, enable PAV if this is a new lcu */
4966 rc
= dasd_alias_make_device_known_to_lcu(device
);
4970 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr_flags
);
4971 dasd_eckd_validate_server(device
, cqr_flags
);
4973 /* RE-Read Configuration Data */
4974 rc
= dasd_eckd_read_conf(device
);
4976 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
,
4977 "Read configuration data failed, rc=%d", rc
);
4981 /* Read Feature Codes */
4982 dasd_eckd_read_features(device
);
4984 /* Read Device Characteristics */
4985 rc
= dasd_generic_read_dev_chars(device
, DASD_ECKD_MAGIC
,
4986 &temp_rdc_data
, 64);
4988 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
,
4989 "Read device characteristic failed, rc=%d", rc
);
4992 spin_lock_irqsave(get_ccwdev_lock(device
->cdev
), flags
);
4993 memcpy(&private->rdc_data
, &temp_rdc_data
, sizeof(temp_rdc_data
));
4994 spin_unlock_irqrestore(get_ccwdev_lock(device
->cdev
), flags
);
4996 /* add device to alias management */
4997 dasd_alias_add_device(device
);
5002 dasd_alias_disconnect_device_from_lcu(device
);
5007 static int dasd_eckd_reload_device(struct dasd_device
*device
)
5009 struct dasd_eckd_private
*private = device
->private;
5012 struct dasd_uid uid
;
5013 unsigned long flags
;
5016 * remove device from alias handling to prevent new requests
5017 * from being scheduled on the wrong alias device
5019 dasd_alias_remove_device(device
);
5021 spin_lock_irqsave(get_ccwdev_lock(device
->cdev
), flags
);
5022 old_base
= private->uid
.base_unit_addr
;
5023 spin_unlock_irqrestore(get_ccwdev_lock(device
->cdev
), flags
);
5025 /* Read Configuration Data */
5026 rc
= dasd_eckd_read_conf(device
);
5030 rc
= dasd_eckd_generate_uid(device
);
5034 * update unit address configuration and
5035 * add device to alias management
5037 dasd_alias_update_add_device(device
);
5039 dasd_eckd_get_uid(device
, &uid
);
5041 if (old_base
!= uid
.base_unit_addr
) {
5042 if (strlen(uid
.vduit
) > 0)
5043 snprintf(print_uid
, sizeof(print_uid
),
5044 "%s.%s.%04x.%02x.%s", uid
.vendor
, uid
.serial
,
5045 uid
.ssid
, uid
.base_unit_addr
, uid
.vduit
);
5047 snprintf(print_uid
, sizeof(print_uid
),
5048 "%s.%s.%04x.%02x", uid
.vendor
, uid
.serial
,
5049 uid
.ssid
, uid
.base_unit_addr
);
5051 dev_info(&device
->cdev
->dev
,
5052 "An Alias device was reassigned to a new base device "
5053 "with UID: %s\n", print_uid
);
5061 static int dasd_eckd_read_message_buffer(struct dasd_device
*device
,
5062 struct dasd_rssd_messages
*messages
,
5065 struct dasd_rssd_messages
*message_buf
;
5066 struct dasd_psf_prssd_data
*prssdp
;
5067 struct dasd_ccw_req
*cqr
;
5071 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1 /* PSF */ + 1 /* RSSD */,
5072 (sizeof(struct dasd_psf_prssd_data
) +
5073 sizeof(struct dasd_rssd_messages
)),
5076 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
, "%s",
5077 "Could not allocate read message buffer request");
5078 return PTR_ERR(cqr
);
5081 cqr
->startdev
= device
;
5082 cqr
->memdev
= device
;
5084 cqr
->expires
= 10 * HZ
;
5085 set_bit(DASD_CQR_VERIFY_PATH
, &cqr
->flags
);
5086 /* dasd_sleep_on_immediatly does not do complex error
5087 * recovery so clear erp flag and set retry counter to
5089 clear_bit(DASD_CQR_FLAGS_USE_ERP
, &cqr
->flags
);
5092 /* Prepare for Read Subsystem Data */
5093 prssdp
= (struct dasd_psf_prssd_data
*) cqr
->data
;
5094 memset(prssdp
, 0, sizeof(struct dasd_psf_prssd_data
));
5095 prssdp
->order
= PSF_ORDER_PRSSD
;
5096 prssdp
->suborder
= 0x03; /* Message Buffer */
5097 /* all other bytes of prssdp must be zero */
5100 ccw
->cmd_code
= DASD_ECKD_CCW_PSF
;
5101 ccw
->count
= sizeof(struct dasd_psf_prssd_data
);
5102 ccw
->flags
|= CCW_FLAG_CC
;
5103 ccw
->flags
|= CCW_FLAG_SLI
;
5104 ccw
->cda
= (__u32
)(addr_t
) prssdp
;
5106 /* Read Subsystem Data - message buffer */
5107 message_buf
= (struct dasd_rssd_messages
*) (prssdp
+ 1);
5108 memset(message_buf
, 0, sizeof(struct dasd_rssd_messages
));
5111 ccw
->cmd_code
= DASD_ECKD_CCW_RSSD
;
5112 ccw
->count
= sizeof(struct dasd_rssd_messages
);
5113 ccw
->flags
|= CCW_FLAG_SLI
;
5114 ccw
->cda
= (__u32
)(addr_t
) message_buf
;
5116 cqr
->buildclk
= get_tod_clock();
5117 cqr
->status
= DASD_CQR_FILLED
;
5118 rc
= dasd_sleep_on_immediatly(cqr
);
5120 prssdp
= (struct dasd_psf_prssd_data
*) cqr
->data
;
5121 message_buf
= (struct dasd_rssd_messages
*)
5123 memcpy(messages
, message_buf
,
5124 sizeof(struct dasd_rssd_messages
));
5126 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
,
5127 "Reading messages failed with rc=%d\n"
5129 dasd_sfree_request(cqr
, cqr
->memdev
);
5133 static int dasd_eckd_query_host_access(struct dasd_device
*device
,
5134 struct dasd_psf_query_host_access
*data
)
5136 struct dasd_eckd_private
*private = device
->private;
5137 struct dasd_psf_query_host_access
*host_access
;
5138 struct dasd_psf_prssd_data
*prssdp
;
5139 struct dasd_ccw_req
*cqr
;
5143 /* not available for HYPER PAV alias devices */
5144 if (!device
->block
&& private->lcu
->pav
== HYPER_PAV
)
5147 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1 /* PSF */ + 1 /* RSSD */,
5148 sizeof(struct dasd_psf_prssd_data
) + 1,
5151 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
, "%s",
5152 "Could not allocate read message buffer request");
5153 return PTR_ERR(cqr
);
5155 host_access
= kzalloc(sizeof(*host_access
), GFP_KERNEL
| GFP_DMA
);
5157 dasd_sfree_request(cqr
, device
);
5158 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
, "%s",
5159 "Could not allocate host_access buffer");
5162 cqr
->startdev
= device
;
5163 cqr
->memdev
= device
;
5166 cqr
->expires
= 10 * HZ
;
5168 /* Prepare for Read Subsystem Data */
5169 prssdp
= (struct dasd_psf_prssd_data
*) cqr
->data
;
5170 memset(prssdp
, 0, sizeof(struct dasd_psf_prssd_data
));
5171 prssdp
->order
= PSF_ORDER_PRSSD
;
5172 prssdp
->suborder
= PSF_SUBORDER_QHA
; /* query host access */
5173 /* LSS and Volume that will be queried */
5174 prssdp
->lss
= private->ned
->ID
;
5175 prssdp
->volume
= private->ned
->unit_addr
;
5176 /* all other bytes of prssdp must be zero */
5179 ccw
->cmd_code
= DASD_ECKD_CCW_PSF
;
5180 ccw
->count
= sizeof(struct dasd_psf_prssd_data
);
5181 ccw
->flags
|= CCW_FLAG_CC
;
5182 ccw
->flags
|= CCW_FLAG_SLI
;
5183 ccw
->cda
= (__u32
)(addr_t
) prssdp
;
5185 /* Read Subsystem Data - query host access */
5187 ccw
->cmd_code
= DASD_ECKD_CCW_RSSD
;
5188 ccw
->count
= sizeof(struct dasd_psf_query_host_access
);
5189 ccw
->flags
|= CCW_FLAG_SLI
;
5190 ccw
->cda
= (__u32
)(addr_t
) host_access
;
5192 cqr
->buildclk
= get_tod_clock();
5193 cqr
->status
= DASD_CQR_FILLED
;
5194 rc
= dasd_sleep_on(cqr
);
5196 *data
= *host_access
;
5198 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
,
5199 "Reading host access data failed with rc=%d\n",
5204 dasd_sfree_request(cqr
, cqr
->memdev
);
5209 * return number of grouped devices
5211 static int dasd_eckd_host_access_count(struct dasd_device
*device
)
5213 struct dasd_psf_query_host_access
*access
;
5214 struct dasd_ckd_path_group_entry
*entry
;
5215 struct dasd_ckd_host_information
*info
;
5219 access
= kzalloc(sizeof(*access
), GFP_NOIO
);
5221 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
, "%s",
5222 "Could not allocate access buffer");
5225 rc
= dasd_eckd_query_host_access(device
, access
);
5231 info
= (struct dasd_ckd_host_information
*)
5232 access
->host_access_information
;
5233 for (i
= 0; i
< info
->entry_count
; i
++) {
5234 entry
= (struct dasd_ckd_path_group_entry
*)
5235 (info
->entry
+ i
* info
->entry_size
);
5236 if (entry
->status_flags
& DASD_ECKD_PG_GROUPED
)
5245 * write host access information to a sequential file
5247 static int dasd_hosts_print(struct dasd_device
*device
, struct seq_file
*m
)
5249 struct dasd_psf_query_host_access
*access
;
5250 struct dasd_ckd_path_group_entry
*entry
;
5251 struct dasd_ckd_host_information
*info
;
5252 char sysplex
[9] = "";
5255 access
= kzalloc(sizeof(*access
), GFP_NOIO
);
5257 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
, "%s",
5258 "Could not allocate access buffer");
5261 rc
= dasd_eckd_query_host_access(device
, access
);
5267 info
= (struct dasd_ckd_host_information
*)
5268 access
->host_access_information
;
5269 for (i
= 0; i
< info
->entry_count
; i
++) {
5270 entry
= (struct dasd_ckd_path_group_entry
*)
5271 (info
->entry
+ i
* info
->entry_size
);
5273 seq_puts(m
, "pgid ");
5274 for (j
= 0; j
< 11; j
++)
5275 seq_printf(m
, "%02x", entry
->pgid
[j
]);
5278 seq_printf(m
, "status_flags %02x\n", entry
->status_flags
);
5280 memcpy(&sysplex
, &entry
->sysplex_name
, sizeof(sysplex
) - 1);
5281 EBCASC(sysplex
, sizeof(sysplex
));
5282 seq_printf(m
, "sysplex_name %8s\n", sysplex
);
5283 /* SUPPORTED CYLINDER */
5284 seq_printf(m
, "supported_cylinder %d\n", entry
->cylinder
);
5286 seq_printf(m
, "timestamp %lu\n", (unsigned long)
5295 * Perform Subsystem Function - CUIR response
5298 dasd_eckd_psf_cuir_response(struct dasd_device
*device
, int response
,
5300 struct channel_path_desc
*desc
,
5301 struct subchannel_id sch_id
)
5303 struct dasd_psf_cuir_response
*psf_cuir
;
5304 struct dasd_ccw_req
*cqr
;
5308 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1 /* PSF */ ,
5309 sizeof(struct dasd_psf_cuir_response
),
5313 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
5314 "Could not allocate PSF-CUIR request");
5315 return PTR_ERR(cqr
);
5318 psf_cuir
= (struct dasd_psf_cuir_response
*)cqr
->data
;
5319 psf_cuir
->order
= PSF_ORDER_CUIR_RESPONSE
;
5320 psf_cuir
->cc
= response
;
5322 psf_cuir
->chpid
= desc
->chpid
;
5323 psf_cuir
->message_id
= message_id
;
5324 psf_cuir
->cssid
= sch_id
.cssid
;
5325 psf_cuir
->ssid
= sch_id
.ssid
;
5327 ccw
->cmd_code
= DASD_ECKD_CCW_PSF
;
5328 ccw
->cda
= (__u32
)(addr_t
)psf_cuir
;
5329 ccw
->flags
= CCW_FLAG_SLI
;
5330 ccw
->count
= sizeof(struct dasd_psf_cuir_response
);
5332 cqr
->startdev
= device
;
5333 cqr
->memdev
= device
;
5336 cqr
->expires
= 10*HZ
;
5337 cqr
->buildclk
= get_tod_clock();
5338 cqr
->status
= DASD_CQR_FILLED
;
5339 set_bit(DASD_CQR_VERIFY_PATH
, &cqr
->flags
);
5341 rc
= dasd_sleep_on(cqr
);
5343 dasd_sfree_request(cqr
, cqr
->memdev
);
5348 * return configuration data that is referenced by record selector
5349 * if a record selector is specified or per default return the
5350 * conf_data pointer for the path specified by lpum
5352 static struct dasd_conf_data
*dasd_eckd_get_ref_conf(struct dasd_device
*device
,
5354 struct dasd_cuir_message
*cuir
)
5356 struct dasd_eckd_private
*private = device
->private;
5357 struct dasd_conf_data
*conf_data
;
5360 if (cuir
->record_selector
== 0)
5362 for (path
= 0x80, pos
= 0; path
; path
>>= 1, pos
++) {
5363 conf_data
= private->path_conf_data
[pos
];
5364 if (conf_data
->gneq
.record_selector
==
5365 cuir
->record_selector
)
5369 return private->path_conf_data
[pathmask_to_pos(lpum
)];
5373 * This function determines the scope of a reconfiguration request by
5374 * analysing the path and device selection data provided in the CUIR request.
5375 * Returns a path mask containing CUIR affected paths for the give device.
5377 * If the CUIR request does not contain the required information return the
5378 * path mask of the path the attention message for the CUIR request was reveived
5381 static int dasd_eckd_cuir_scope(struct dasd_device
*device
, __u8 lpum
,
5382 struct dasd_cuir_message
*cuir
)
5384 struct dasd_eckd_private
*private = device
->private;
5385 struct dasd_conf_data
*ref_conf_data
;
5386 unsigned long bitmask
= 0, mask
= 0;
5387 struct dasd_conf_data
*conf_data
;
5388 unsigned int pos
, path
;
5389 char *ref_gneq
, *gneq
;
5390 char *ref_ned
, *ned
;
5393 /* if CUIR request does not specify the scope use the path
5394 the attention message was presented on */
5395 if (!cuir
->ned_map
||
5396 !(cuir
->neq_map
[0] | cuir
->neq_map
[1] | cuir
->neq_map
[2]))
5399 /* get reference conf data */
5400 ref_conf_data
= dasd_eckd_get_ref_conf(device
, lpum
, cuir
);
5401 /* reference ned is determined by ned_map field */
5402 pos
= 8 - ffs(cuir
->ned_map
);
5403 ref_ned
= (char *)&ref_conf_data
->neds
[pos
];
5404 ref_gneq
= (char *)&ref_conf_data
->gneq
;
5405 /* transfer 24 bit neq_map to mask */
5406 mask
= cuir
->neq_map
[2];
5407 mask
|= cuir
->neq_map
[1] << 8;
5408 mask
|= cuir
->neq_map
[0] << 16;
5410 for (path
= 0x80; path
; path
>>= 1) {
5411 /* initialise data per path */
5413 pos
= pathmask_to_pos(path
);
5414 conf_data
= private->path_conf_data
[pos
];
5415 pos
= 8 - ffs(cuir
->ned_map
);
5416 ned
= (char *) &conf_data
->neds
[pos
];
5417 /* compare reference ned and per path ned */
5418 if (memcmp(ref_ned
, ned
, sizeof(*ned
)) != 0)
5420 gneq
= (char *)&conf_data
->gneq
;
5421 /* compare reference gneq and per_path gneq under
5422 24 bit mask where mask bit 0 equals byte 7 of
5423 the gneq and mask bit 24 equals byte 31 */
5425 pos
= ffs(bitmask
) - 1;
5426 if (memcmp(&ref_gneq
[31 - pos
], &gneq
[31 - pos
], 1)
5429 clear_bit(pos
, &bitmask
);
5433 /* device and path match the reference values
5434 add path to CUIR scope */
5440 static void dasd_eckd_cuir_notify_user(struct dasd_device
*device
,
5441 unsigned long paths
,
5442 struct subchannel_id sch_id
, int action
)
5444 struct channel_path_desc
*desc
;
5448 /* get position of bit in mask */
5449 pos
= ffs(paths
) - 1;
5450 /* get channel path descriptor from this position */
5451 desc
= ccw_device_get_chp_desc(device
->cdev
, 7 - pos
);
5452 if (action
== CUIR_QUIESCE
)
5453 pr_warn("Service on the storage server caused path "
5454 "%x.%02x to go offline", sch_id
.cssid
,
5455 desc
? desc
->chpid
: 0);
5456 else if (action
== CUIR_RESUME
)
5457 pr_info("Path %x.%02x is back online after service "
5458 "on the storage server", sch_id
.cssid
,
5459 desc
? desc
->chpid
: 0);
5461 clear_bit(pos
, &paths
);
5465 static int dasd_eckd_cuir_remove_path(struct dasd_device
*device
, __u8 lpum
,
5466 struct dasd_cuir_message
*cuir
)
5468 unsigned long tbcpm
;
5470 tbcpm
= dasd_eckd_cuir_scope(device
, lpum
, cuir
);
5471 /* nothing to do if path is not in use */
5472 if (!(device
->path_data
.opm
& tbcpm
))
5474 if (!(device
->path_data
.opm
& ~tbcpm
)) {
5475 /* no path would be left if the CUIR action is taken
5479 /* remove device from operational path mask */
5480 device
->path_data
.opm
&= ~tbcpm
;
5481 device
->path_data
.cuirpm
|= tbcpm
;
5486 * walk through all devices and build a path mask to quiesce them
5487 * return an error if the last path to a device would be removed
5489 * if only part of the devices are quiesced and an error
5490 * occurs no onlining necessary, the storage server will
5491 * notify the already set offline devices again
5493 static int dasd_eckd_cuir_quiesce(struct dasd_device
*device
, __u8 lpum
,
5494 struct subchannel_id sch_id
,
5495 struct dasd_cuir_message
*cuir
)
5497 struct dasd_eckd_private
*private = device
->private;
5498 struct alias_pav_group
*pavgroup
, *tempgroup
;
5499 struct dasd_device
*dev
, *n
;
5500 unsigned long paths
= 0;
5501 unsigned long flags
;
5504 /* active devices */
5505 list_for_each_entry_safe(dev
, n
, &private->lcu
->active_devices
,
5507 spin_lock_irqsave(get_ccwdev_lock(dev
->cdev
), flags
);
5508 tbcpm
= dasd_eckd_cuir_remove_path(dev
, lpum
, cuir
);
5509 spin_unlock_irqrestore(get_ccwdev_lock(dev
->cdev
), flags
);
5514 /* inactive devices */
5515 list_for_each_entry_safe(dev
, n
, &private->lcu
->inactive_devices
,
5517 spin_lock_irqsave(get_ccwdev_lock(dev
->cdev
), flags
);
5518 tbcpm
= dasd_eckd_cuir_remove_path(dev
, lpum
, cuir
);
5519 spin_unlock_irqrestore(get_ccwdev_lock(dev
->cdev
), flags
);
5524 /* devices in PAV groups */
5525 list_for_each_entry_safe(pavgroup
, tempgroup
,
5526 &private->lcu
->grouplist
, group
) {
5527 list_for_each_entry_safe(dev
, n
, &pavgroup
->baselist
,
5529 spin_lock_irqsave(get_ccwdev_lock(dev
->cdev
), flags
);
5530 tbcpm
= dasd_eckd_cuir_remove_path(dev
, lpum
, cuir
);
5531 spin_unlock_irqrestore(
5532 get_ccwdev_lock(dev
->cdev
), flags
);
5537 list_for_each_entry_safe(dev
, n
, &pavgroup
->aliaslist
,
5539 spin_lock_irqsave(get_ccwdev_lock(dev
->cdev
), flags
);
5540 tbcpm
= dasd_eckd_cuir_remove_path(dev
, lpum
, cuir
);
5541 spin_unlock_irqrestore(
5542 get_ccwdev_lock(dev
->cdev
), flags
);
5548 /* notify user about all paths affected by CUIR action */
5549 dasd_eckd_cuir_notify_user(device
, paths
, sch_id
, CUIR_QUIESCE
);
5555 static int dasd_eckd_cuir_resume(struct dasd_device
*device
, __u8 lpum
,
5556 struct subchannel_id sch_id
,
5557 struct dasd_cuir_message
*cuir
)
5559 struct dasd_eckd_private
*private = device
->private;
5560 struct alias_pav_group
*pavgroup
, *tempgroup
;
5561 struct dasd_device
*dev
, *n
;
5562 unsigned long paths
= 0;
5566 * the path may have been added through a generic path event before
5567 * only trigger path verification if the path is not already in use
5569 list_for_each_entry_safe(dev
, n
,
5570 &private->lcu
->active_devices
,
5572 tbcpm
= dasd_eckd_cuir_scope(dev
, lpum
, cuir
);
5574 if (!(dev
->path_data
.opm
& tbcpm
)) {
5575 dev
->path_data
.tbvpm
|= tbcpm
;
5576 dasd_schedule_device_bh(dev
);
5579 list_for_each_entry_safe(dev
, n
,
5580 &private->lcu
->inactive_devices
,
5582 tbcpm
= dasd_eckd_cuir_scope(dev
, lpum
, cuir
);
5584 if (!(dev
->path_data
.opm
& tbcpm
)) {
5585 dev
->path_data
.tbvpm
|= tbcpm
;
5586 dasd_schedule_device_bh(dev
);
5589 /* devices in PAV groups */
5590 list_for_each_entry_safe(pavgroup
, tempgroup
,
5591 &private->lcu
->grouplist
,
5593 list_for_each_entry_safe(dev
, n
,
5594 &pavgroup
->baselist
,
5596 tbcpm
= dasd_eckd_cuir_scope(dev
, lpum
, cuir
);
5598 if (!(dev
->path_data
.opm
& tbcpm
)) {
5599 dev
->path_data
.tbvpm
|= tbcpm
;
5600 dasd_schedule_device_bh(dev
);
5603 list_for_each_entry_safe(dev
, n
,
5604 &pavgroup
->aliaslist
,
5606 tbcpm
= dasd_eckd_cuir_scope(dev
, lpum
, cuir
);
5608 if (!(dev
->path_data
.opm
& tbcpm
)) {
5609 dev
->path_data
.tbvpm
|= tbcpm
;
5610 dasd_schedule_device_bh(dev
);
5614 /* notify user about all paths affected by CUIR action */
5615 dasd_eckd_cuir_notify_user(device
, paths
, sch_id
, CUIR_RESUME
);
5619 static void dasd_eckd_handle_cuir(struct dasd_device
*device
, void *messages
,
5622 struct dasd_cuir_message
*cuir
= messages
;
5623 struct channel_path_desc
*desc
;
5624 struct subchannel_id sch_id
;
5627 DBF_DEV_EVENT(DBF_WARNING
, device
,
5628 "CUIR request: %016llx %016llx %016llx %08x",
5629 ((u64
*)cuir
)[0], ((u64
*)cuir
)[1], ((u64
*)cuir
)[2],
5631 ccw_device_get_schid(device
->cdev
, &sch_id
);
5632 pos
= pathmask_to_pos(lpum
);
5633 desc
= ccw_device_get_chp_desc(device
->cdev
, pos
);
5635 if (cuir
->code
== CUIR_QUIESCE
) {
5637 if (dasd_eckd_cuir_quiesce(device
, lpum
, sch_id
, cuir
))
5638 response
= PSF_CUIR_LAST_PATH
;
5640 response
= PSF_CUIR_COMPLETED
;
5641 } else if (cuir
->code
== CUIR_RESUME
) {
5643 dasd_eckd_cuir_resume(device
, lpum
, sch_id
, cuir
);
5644 response
= PSF_CUIR_COMPLETED
;
5646 response
= PSF_CUIR_NOT_SUPPORTED
;
5648 dasd_eckd_psf_cuir_response(device
, response
,
5649 cuir
->message_id
, desc
, sch_id
);
5650 DBF_DEV_EVENT(DBF_WARNING
, device
,
5651 "CUIR response: %d on message ID %08x", response
,
5653 /* free descriptor copy */
5655 /* to make sure there is no attention left schedule work again */
5656 device
->discipline
->check_attention(device
, lpum
);
5659 static void dasd_eckd_check_attention_work(struct work_struct
*work
)
5661 struct check_attention_work_data
*data
;
5662 struct dasd_rssd_messages
*messages
;
5663 struct dasd_device
*device
;
5666 data
= container_of(work
, struct check_attention_work_data
, worker
);
5667 device
= data
->device
;
5668 messages
= kzalloc(sizeof(*messages
), GFP_KERNEL
);
5670 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
5671 "Could not allocate attention message buffer");
5674 rc
= dasd_eckd_read_message_buffer(device
, messages
, data
->lpum
);
5677 if (messages
->length
== ATTENTION_LENGTH_CUIR
&&
5678 messages
->format
== ATTENTION_FORMAT_CUIR
)
5679 dasd_eckd_handle_cuir(device
, messages
, data
->lpum
);
5681 dasd_put_device(device
);
5686 static int dasd_eckd_check_attention(struct dasd_device
*device
, __u8 lpum
)
5688 struct check_attention_work_data
*data
;
5690 data
= kzalloc(sizeof(*data
), GFP_ATOMIC
);
5693 INIT_WORK(&data
->worker
, dasd_eckd_check_attention_work
);
5694 dasd_get_device(device
);
5695 data
->device
= device
;
5697 schedule_work(&data
->worker
);
5701 static struct ccw_driver dasd_eckd_driver
= {
5703 .name
= "dasd-eckd",
5704 .owner
= THIS_MODULE
,
5706 .ids
= dasd_eckd_ids
,
5707 .probe
= dasd_eckd_probe
,
5708 .remove
= dasd_generic_remove
,
5709 .set_offline
= dasd_generic_set_offline
,
5710 .set_online
= dasd_eckd_set_online
,
5711 .notify
= dasd_generic_notify
,
5712 .path_event
= dasd_generic_path_event
,
5713 .shutdown
= dasd_generic_shutdown
,
5714 .freeze
= dasd_generic_pm_freeze
,
5715 .thaw
= dasd_generic_restore_device
,
5716 .restore
= dasd_generic_restore_device
,
5717 .uc_handler
= dasd_generic_uc_handler
,
5718 .int_class
= IRQIO_DAS
,
5722 * max_blocks is dependent on the amount of storage that is available
5723 * in the static io buffer for each device. Currently each device has
5724 * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has
5725 * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use
5726 * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In
5727 * addition we have one define extent ccw + 16 bytes of data and one
5728 * locate record ccw + 16 bytes of data. That makes:
5729 * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum.
5730 * We want to fit two into the available memory so that we can immediately
5731 * start the next request if one finishes off. That makes 249.5 blocks
5732 * for one request. Give a little safety and the result is 240.
5734 static struct dasd_discipline dasd_eckd_discipline
= {
5735 .owner
= THIS_MODULE
,
5739 .check_device
= dasd_eckd_check_characteristics
,
5740 .uncheck_device
= dasd_eckd_uncheck_device
,
5741 .do_analysis
= dasd_eckd_do_analysis
,
5742 .verify_path
= dasd_eckd_verify_path
,
5743 .basic_to_ready
= dasd_eckd_basic_to_ready
,
5744 .online_to_ready
= dasd_eckd_online_to_ready
,
5745 .basic_to_known
= dasd_eckd_basic_to_known
,
5746 .fill_geometry
= dasd_eckd_fill_geometry
,
5747 .start_IO
= dasd_start_IO
,
5748 .term_IO
= dasd_term_IO
,
5749 .handle_terminated_request
= dasd_eckd_handle_terminated_request
,
5750 .format_device
= dasd_eckd_format_device
,
5751 .check_device_format
= dasd_eckd_check_device_format
,
5752 .erp_action
= dasd_eckd_erp_action
,
5753 .erp_postaction
= dasd_eckd_erp_postaction
,
5754 .check_for_device_change
= dasd_eckd_check_for_device_change
,
5755 .build_cp
= dasd_eckd_build_alias_cp
,
5756 .free_cp
= dasd_eckd_free_alias_cp
,
5757 .dump_sense
= dasd_eckd_dump_sense
,
5758 .dump_sense_dbf
= dasd_eckd_dump_sense_dbf
,
5759 .fill_info
= dasd_eckd_fill_info
,
5760 .ioctl
= dasd_eckd_ioctl
,
5761 .freeze
= dasd_eckd_pm_freeze
,
5762 .restore
= dasd_eckd_restore_device
,
5763 .reload
= dasd_eckd_reload_device
,
5764 .get_uid
= dasd_eckd_get_uid
,
5765 .kick_validate
= dasd_eckd_kick_validate_server
,
5766 .check_attention
= dasd_eckd_check_attention
,
5767 .host_access_count
= dasd_eckd_host_access_count
,
5768 .hosts_print
= dasd_hosts_print
,
5772 dasd_eckd_init(void)
5776 ASCEBC(dasd_eckd_discipline
.ebcname
, 4);
5777 dasd_reserve_req
= kmalloc(sizeof(*dasd_reserve_req
),
5778 GFP_KERNEL
| GFP_DMA
);
5779 if (!dasd_reserve_req
)
5781 path_verification_worker
= kmalloc(sizeof(*path_verification_worker
),
5782 GFP_KERNEL
| GFP_DMA
);
5783 if (!path_verification_worker
) {
5784 kfree(dasd_reserve_req
);
5787 rawpadpage
= (void *)__get_free_page(GFP_KERNEL
);
5789 kfree(path_verification_worker
);
5790 kfree(dasd_reserve_req
);
5793 ret
= ccw_driver_register(&dasd_eckd_driver
);
5795 wait_for_device_probe();
5797 kfree(path_verification_worker
);
5798 kfree(dasd_reserve_req
);
5799 free_page((unsigned long)rawpadpage
);
5805 dasd_eckd_cleanup(void)
5807 ccw_driver_unregister(&dasd_eckd_driver
);
5808 kfree(path_verification_worker
);
5809 kfree(dasd_reserve_req
);
5810 free_page((unsigned long)rawpadpage
);
5813 module_init(dasd_eckd_init
);
5814 module_exit(dasd_eckd_cleanup
);