2 * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
3 * Horst Hummel <Horst.Hummel@de.ibm.com>
4 * Carsten Otte <Cotte@de.ibm.com>
5 * Martin Schwidefsky <schwidefsky@de.ibm.com>
6 * Bugreports.to..: <Linux390@de.ibm.com>
7 * Copyright IBM Corp. 1999, 2009
8 * EMC Symmetrix ioctl Copyright EMC Corporation, 2008
9 * Author.........: Nigel Hislop <hislop_nigel@emc.com>
12 #define KMSG_COMPONENT "dasd-eckd"
14 #include <linux/stddef.h>
15 #include <linux/kernel.h>
16 #include <linux/slab.h>
17 #include <linux/hdreg.h> /* HDIO_GETGEO */
18 #include <linux/bio.h>
19 #include <linux/module.h>
20 #include <linux/compat.h>
21 #include <linux/init.h>
22 #include <linux/seq_file.h>
24 #include <asm/css_chars.h>
25 #include <asm/debug.h>
26 #include <asm/idals.h>
27 #include <asm/ebcdic.h>
29 #include <linux/uaccess.h>
31 #include <asm/ccwdev.h>
33 #include <asm/schid.h>
34 #include <asm/chpid.h>
37 #include "dasd_eckd.h"
41 #endif /* PRINTK_HEADER */
42 #define PRINTK_HEADER "dasd(eckd):"
44 #define ECKD_C0(i) (i->home_bytes)
45 #define ECKD_F(i) (i->formula)
46 #define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\
47 (i->factors.f_0x02.f1))
48 #define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\
49 (i->factors.f_0x02.f2))
50 #define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\
51 (i->factors.f_0x02.f3))
52 #define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0)
53 #define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0)
54 #define ECKD_F6(i) (i->factor6)
55 #define ECKD_F7(i) (i->factor7)
56 #define ECKD_F8(i) (i->factor8)
59 * raw track access always map to 64k in memory
60 * so it maps to 16 blocks of 4k per track
62 #define DASD_RAW_BLOCK_PER_TRACK 16
63 #define DASD_RAW_BLOCKSIZE 4096
64 /* 64k are 128 x 512 byte sectors */
65 #define DASD_RAW_SECTORS_PER_TRACK 128
67 MODULE_LICENSE("GPL");
69 static struct dasd_discipline dasd_eckd_discipline
;
71 /* The ccw bus type uses this table to find devices that it sends to
73 static struct ccw_device_id dasd_eckd_ids
[] = {
74 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info
= 0x1},
75 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info
= 0x2},
76 { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3380, 0), .driver_info
= 0x3},
77 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info
= 0x4},
78 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info
= 0x5},
79 { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info
= 0x6},
80 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info
= 0x7},
81 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info
= 0x8},
82 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info
= 0x9},
83 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info
= 0xa},
84 { /* end of list */ },
87 MODULE_DEVICE_TABLE(ccw
, dasd_eckd_ids
);
89 static struct ccw_driver dasd_eckd_driver
; /* see below */
91 static void *rawpadpage
;
94 #define INIT_CQR_UNFORMATTED 1
95 #define INIT_CQR_ERROR 2
97 /* emergency request for reserve/release */
99 struct dasd_ccw_req cqr
;
103 static DEFINE_MUTEX(dasd_reserve_mutex
);
105 /* definitions for the path verification worker */
106 struct path_verification_work_data
{
107 struct work_struct worker
;
108 struct dasd_device
*device
;
109 struct dasd_ccw_req cqr
;
111 __u8 rcd_buffer
[DASD_ECKD_RCD_DATA_SIZE
];
115 static struct path_verification_work_data
*path_verification_worker
;
116 static DEFINE_MUTEX(dasd_path_verification_mutex
);
118 struct check_attention_work_data
{
119 struct work_struct worker
;
120 struct dasd_device
*device
;
124 static int prepare_itcw(struct itcw
*, unsigned int, unsigned int, int,
125 struct dasd_device
*, struct dasd_device
*,
126 unsigned int, int, unsigned int, unsigned int,
127 unsigned int, unsigned int);
129 /* initial attempt at a probe function. this can be simplified once
130 * the other detection code is gone */
132 dasd_eckd_probe (struct ccw_device
*cdev
)
136 /* set ECKD specific ccw-device options */
137 ret
= ccw_device_set_options(cdev
, CCWDEV_ALLOW_FORCE
|
138 CCWDEV_DO_PATHGROUP
| CCWDEV_DO_MULTIPATH
);
140 DBF_EVENT_DEVID(DBF_WARNING
, cdev
, "%s",
141 "dasd_eckd_probe: could not set "
142 "ccw-device options");
145 ret
= dasd_generic_probe(cdev
, &dasd_eckd_discipline
);
150 dasd_eckd_set_online(struct ccw_device
*cdev
)
152 return dasd_generic_set_online(cdev
, &dasd_eckd_discipline
);
155 static const int sizes_trk0
[] = { 28, 148, 84 };
156 #define LABEL_SIZE 140
158 /* head and record addresses of count_area read in analysis ccw */
159 static const int count_area_head
[] = { 0, 0, 0, 0, 2 };
160 static const int count_area_rec
[] = { 1, 2, 3, 4, 1 };
162 static inline unsigned int
163 round_up_multiple(unsigned int no
, unsigned int mult
)
166 return (rem
? no
- rem
+ mult
: no
);
169 static inline unsigned int
170 ceil_quot(unsigned int d1
, unsigned int d2
)
172 return (d1
+ (d2
- 1)) / d2
;
176 recs_per_track(struct dasd_eckd_characteristics
* rdc
,
177 unsigned int kl
, unsigned int dl
)
181 switch (rdc
->dev_type
) {
184 return 1499 / (15 + 7 + ceil_quot(kl
+ 12, 32) +
185 ceil_quot(dl
+ 12, 32));
187 return 1499 / (15 + ceil_quot(dl
+ 12, 32));
189 dn
= ceil_quot(dl
+ 6, 232) + 1;
191 kn
= ceil_quot(kl
+ 6, 232) + 1;
192 return 1729 / (10 + 9 + ceil_quot(kl
+ 6 * kn
, 34) +
193 9 + ceil_quot(dl
+ 6 * dn
, 34));
195 return 1729 / (10 + 9 + ceil_quot(dl
+ 6 * dn
, 34));
197 dn
= ceil_quot(dl
+ 6, 232) + 1;
199 kn
= ceil_quot(kl
+ 6, 232) + 1;
200 return 1420 / (18 + 7 + ceil_quot(kl
+ 6 * kn
, 34) +
201 ceil_quot(dl
+ 6 * dn
, 34));
203 return 1420 / (18 + 7 + ceil_quot(dl
+ 6 * dn
, 34));
208 static void set_ch_t(struct ch_t
*geo
, __u32 cyl
, __u8 head
)
210 geo
->cyl
= (__u16
) cyl
;
211 geo
->head
= cyl
>> 16;
216 static int check_XRC(struct ccw1
*ccw
, struct DE_eckd_data
*data
,
217 struct dasd_device
*device
)
219 struct dasd_eckd_private
*private = device
->private;
222 if (!private->rdc_data
.facilities
.XRC_supported
)
225 /* switch on System Time Stamp - needed for XRC Support */
226 data
->ga_extended
|= 0x08; /* switch on 'Time Stamp Valid' */
227 data
->ga_extended
|= 0x02; /* switch on 'Extended Parameter' */
229 rc
= get_phys_clock(&data
->ep_sys_time
);
230 /* Ignore return code if sync clock is switched off. */
231 if (rc
== -EOPNOTSUPP
|| rc
== -EACCES
)
235 ccw
->count
= sizeof(struct DE_eckd_data
);
236 ccw
->flags
|= CCW_FLAG_SLI
;
243 define_extent(struct ccw1
*ccw
, struct DE_eckd_data
*data
, unsigned int trk
,
244 unsigned int totrk
, int cmd
, struct dasd_device
*device
,
247 struct dasd_eckd_private
*private = device
->private;
248 u16 heads
, beghead
, endhead
;
253 ccw
->cmd_code
= DASD_ECKD_CCW_DEFINE_EXTENT
;
256 ccw
->cda
= (__u32
)__pa(data
);
259 memset(data
, 0, sizeof(struct DE_eckd_data
));
261 case DASD_ECKD_CCW_READ_HOME_ADDRESS
:
262 case DASD_ECKD_CCW_READ_RECORD_ZERO
:
263 case DASD_ECKD_CCW_READ
:
264 case DASD_ECKD_CCW_READ_MT
:
265 case DASD_ECKD_CCW_READ_CKD
:
266 case DASD_ECKD_CCW_READ_CKD_MT
:
267 case DASD_ECKD_CCW_READ_KD
:
268 case DASD_ECKD_CCW_READ_KD_MT
:
269 data
->mask
.perm
= 0x1;
270 data
->attributes
.operation
= private->attrib
.operation
;
272 case DASD_ECKD_CCW_READ_COUNT
:
273 data
->mask
.perm
= 0x1;
274 data
->attributes
.operation
= DASD_BYPASS_CACHE
;
276 case DASD_ECKD_CCW_READ_TRACK
:
277 case DASD_ECKD_CCW_READ_TRACK_DATA
:
278 data
->mask
.perm
= 0x1;
279 data
->attributes
.operation
= private->attrib
.operation
;
282 case DASD_ECKD_CCW_WRITE
:
283 case DASD_ECKD_CCW_WRITE_MT
:
284 case DASD_ECKD_CCW_WRITE_KD
:
285 case DASD_ECKD_CCW_WRITE_KD_MT
:
286 data
->mask
.perm
= 0x02;
287 data
->attributes
.operation
= private->attrib
.operation
;
288 rc
= check_XRC(ccw
, data
, device
);
290 case DASD_ECKD_CCW_WRITE_CKD
:
291 case DASD_ECKD_CCW_WRITE_CKD_MT
:
292 data
->attributes
.operation
= DASD_BYPASS_CACHE
;
293 rc
= check_XRC(ccw
, data
, device
);
295 case DASD_ECKD_CCW_ERASE
:
296 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS
:
297 case DASD_ECKD_CCW_WRITE_RECORD_ZERO
:
298 data
->mask
.perm
= 0x3;
299 data
->mask
.auth
= 0x1;
300 data
->attributes
.operation
= DASD_BYPASS_CACHE
;
301 rc
= check_XRC(ccw
, data
, device
);
303 case DASD_ECKD_CCW_WRITE_FULL_TRACK
:
304 data
->mask
.perm
= 0x03;
305 data
->attributes
.operation
= private->attrib
.operation
;
308 case DASD_ECKD_CCW_WRITE_TRACK_DATA
:
309 data
->mask
.perm
= 0x02;
310 data
->attributes
.operation
= private->attrib
.operation
;
311 data
->blk_size
= blksize
;
312 rc
= check_XRC(ccw
, data
, device
);
315 dev_err(&device
->cdev
->dev
,
316 "0x%x is not a known command\n", cmd
);
320 data
->attributes
.mode
= 0x3; /* ECKD */
322 if ((private->rdc_data
.cu_type
== 0x2105 ||
323 private->rdc_data
.cu_type
== 0x2107 ||
324 private->rdc_data
.cu_type
== 0x1750)
325 && !(private->uses_cdl
&& trk
< 2))
326 data
->ga_extended
|= 0x40; /* Regular Data Format Mode */
328 heads
= private->rdc_data
.trk_per_cyl
;
329 begcyl
= trk
/ heads
;
330 beghead
= trk
% heads
;
331 endcyl
= totrk
/ heads
;
332 endhead
= totrk
% heads
;
334 /* check for sequential prestage - enhance cylinder range */
335 if (data
->attributes
.operation
== DASD_SEQ_PRESTAGE
||
336 data
->attributes
.operation
== DASD_SEQ_ACCESS
) {
338 if (endcyl
+ private->attrib
.nr_cyl
< private->real_cyl
)
339 endcyl
+= private->attrib
.nr_cyl
;
341 endcyl
= (private->real_cyl
- 1);
344 set_ch_t(&data
->beg_ext
, begcyl
, beghead
);
345 set_ch_t(&data
->end_ext
, endcyl
, endhead
);
350 static void locate_record_ext(struct ccw1
*ccw
, struct LRE_eckd_data
*data
,
351 unsigned int trk
, unsigned int rec_on_trk
,
352 int count
, int cmd
, struct dasd_device
*device
,
353 unsigned int reclen
, unsigned int tlf
)
355 struct dasd_eckd_private
*private = device
->private;
360 ccw
->cmd_code
= DASD_ECKD_CCW_LOCATE_RECORD_EXT
;
362 if (cmd
== DASD_ECKD_CCW_WRITE_FULL_TRACK
)
366 ccw
->cda
= (__u32
)__pa(data
);
369 memset(data
, 0, sizeof(*data
));
372 switch (private->rdc_data
.dev_type
) {
374 dn
= ceil_quot(reclen
+ 6, 232);
375 d
= 9 + ceil_quot(reclen
+ 6 * (dn
+ 1), 34);
376 sector
= (49 + (rec_on_trk
- 1) * (10 + d
)) / 8;
379 d
= 7 + ceil_quot(reclen
+ 12, 32);
380 sector
= (39 + (rec_on_trk
- 1) * (8 + d
)) / 7;
384 data
->sector
= sector
;
385 /* note: meaning of count depends on the operation
386 * for record based I/O it's the number of records, but for
387 * track based I/O it's the number of tracks
391 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS
:
392 data
->operation
.orientation
= 0x3;
393 data
->operation
.operation
= 0x03;
395 case DASD_ECKD_CCW_READ_HOME_ADDRESS
:
396 data
->operation
.orientation
= 0x3;
397 data
->operation
.operation
= 0x16;
399 case DASD_ECKD_CCW_WRITE_RECORD_ZERO
:
400 data
->operation
.orientation
= 0x1;
401 data
->operation
.operation
= 0x03;
404 case DASD_ECKD_CCW_READ_RECORD_ZERO
:
405 data
->operation
.orientation
= 0x3;
406 data
->operation
.operation
= 0x16;
409 case DASD_ECKD_CCW_WRITE
:
410 case DASD_ECKD_CCW_WRITE_MT
:
411 case DASD_ECKD_CCW_WRITE_KD
:
412 case DASD_ECKD_CCW_WRITE_KD_MT
:
413 data
->auxiliary
.length_valid
= 0x1;
414 data
->length
= reclen
;
415 data
->operation
.operation
= 0x01;
417 case DASD_ECKD_CCW_WRITE_CKD
:
418 case DASD_ECKD_CCW_WRITE_CKD_MT
:
419 data
->auxiliary
.length_valid
= 0x1;
420 data
->length
= reclen
;
421 data
->operation
.operation
= 0x03;
423 case DASD_ECKD_CCW_WRITE_FULL_TRACK
:
424 data
->operation
.orientation
= 0x0;
425 data
->operation
.operation
= 0x3F;
426 data
->extended_operation
= 0x11;
428 data
->extended_parameter_length
= 0x02;
429 if (data
->count
> 8) {
430 data
->extended_parameter
[0] = 0xFF;
431 data
->extended_parameter
[1] = 0xFF;
432 data
->extended_parameter
[1] <<= (16 - count
);
434 data
->extended_parameter
[0] = 0xFF;
435 data
->extended_parameter
[0] <<= (8 - count
);
436 data
->extended_parameter
[1] = 0x00;
440 case DASD_ECKD_CCW_WRITE_TRACK_DATA
:
441 data
->auxiliary
.length_valid
= 0x1;
442 data
->length
= reclen
; /* not tlf, as one might think */
443 data
->operation
.operation
= 0x3F;
444 data
->extended_operation
= 0x23;
446 case DASD_ECKD_CCW_READ
:
447 case DASD_ECKD_CCW_READ_MT
:
448 case DASD_ECKD_CCW_READ_KD
:
449 case DASD_ECKD_CCW_READ_KD_MT
:
450 data
->auxiliary
.length_valid
= 0x1;
451 data
->length
= reclen
;
452 data
->operation
.operation
= 0x06;
454 case DASD_ECKD_CCW_READ_CKD
:
455 case DASD_ECKD_CCW_READ_CKD_MT
:
456 data
->auxiliary
.length_valid
= 0x1;
457 data
->length
= reclen
;
458 data
->operation
.operation
= 0x16;
460 case DASD_ECKD_CCW_READ_COUNT
:
461 data
->operation
.operation
= 0x06;
463 case DASD_ECKD_CCW_READ_TRACK
:
464 data
->operation
.orientation
= 0x1;
465 data
->operation
.operation
= 0x0C;
466 data
->extended_parameter_length
= 0;
469 case DASD_ECKD_CCW_READ_TRACK_DATA
:
470 data
->auxiliary
.length_valid
= 0x1;
472 data
->operation
.operation
= 0x0C;
474 case DASD_ECKD_CCW_ERASE
:
475 data
->length
= reclen
;
476 data
->auxiliary
.length_valid
= 0x1;
477 data
->operation
.operation
= 0x0b;
480 DBF_DEV_EVENT(DBF_ERR
, device
,
481 "fill LRE unknown opcode 0x%x", cmd
);
484 set_ch_t(&data
->seek_addr
,
485 trk
/ private->rdc_data
.trk_per_cyl
,
486 trk
% private->rdc_data
.trk_per_cyl
);
487 data
->search_arg
.cyl
= data
->seek_addr
.cyl
;
488 data
->search_arg
.head
= data
->seek_addr
.head
;
489 data
->search_arg
.record
= rec_on_trk
;
492 static int prefix_LRE(struct ccw1
*ccw
, struct PFX_eckd_data
*pfxdata
,
493 unsigned int trk
, unsigned int totrk
, int cmd
,
494 struct dasd_device
*basedev
, struct dasd_device
*startdev
,
495 unsigned int format
, unsigned int rec_on_trk
, int count
,
496 unsigned int blksize
, unsigned int tlf
)
498 struct dasd_eckd_private
*basepriv
, *startpriv
;
499 struct LRE_eckd_data
*lredata
;
500 struct DE_eckd_data
*dedata
;
503 basepriv
= basedev
->private;
504 startpriv
= startdev
->private;
505 dedata
= &pfxdata
->define_extent
;
506 lredata
= &pfxdata
->locate_record
;
508 ccw
->cmd_code
= DASD_ECKD_CCW_PFX
;
510 if (cmd
== DASD_ECKD_CCW_WRITE_FULL_TRACK
) {
511 ccw
->count
= sizeof(*pfxdata
) + 2;
512 ccw
->cda
= (__u32
) __pa(pfxdata
);
513 memset(pfxdata
, 0, sizeof(*pfxdata
) + 2);
515 ccw
->count
= sizeof(*pfxdata
);
516 ccw
->cda
= (__u32
) __pa(pfxdata
);
517 memset(pfxdata
, 0, sizeof(*pfxdata
));
522 DBF_DEV_EVENT(DBF_ERR
, basedev
,
523 "PFX LRE unknown format 0x%x", format
);
527 pfxdata
->format
= format
;
528 pfxdata
->base_address
= basepriv
->ned
->unit_addr
;
529 pfxdata
->base_lss
= basepriv
->ned
->ID
;
530 pfxdata
->validity
.define_extent
= 1;
532 /* private uid is kept up to date, conf_data may be outdated */
533 if (startpriv
->uid
.type
!= UA_BASE_DEVICE
) {
534 pfxdata
->validity
.verify_base
= 1;
535 if (startpriv
->uid
.type
== UA_HYPER_PAV_ALIAS
)
536 pfxdata
->validity
.hyper_pav
= 1;
539 rc
= define_extent(NULL
, dedata
, trk
, totrk
, cmd
, basedev
, blksize
);
542 * For some commands the System Time Stamp is set in the define extent
543 * data when XRC is supported. The validity of the time stamp must be
544 * reflected in the prefix data as well.
546 if (dedata
->ga_extended
& 0x08 && dedata
->ga_extended
& 0x02)
547 pfxdata
->validity
.time_stamp
= 1; /* 'Time Stamp Valid' */
550 locate_record_ext(NULL
, lredata
, trk
, rec_on_trk
, count
, cmd
,
551 basedev
, blksize
, tlf
);
557 static int prefix(struct ccw1
*ccw
, struct PFX_eckd_data
*pfxdata
,
558 unsigned int trk
, unsigned int totrk
, int cmd
,
559 struct dasd_device
*basedev
, struct dasd_device
*startdev
)
561 return prefix_LRE(ccw
, pfxdata
, trk
, totrk
, cmd
, basedev
, startdev
,
566 locate_record(struct ccw1
*ccw
, struct LO_eckd_data
*data
, unsigned int trk
,
567 unsigned int rec_on_trk
, int no_rec
, int cmd
,
568 struct dasd_device
* device
, int reclen
)
570 struct dasd_eckd_private
*private = device
->private;
574 DBF_DEV_EVENT(DBF_INFO
, device
,
575 "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d",
576 trk
, rec_on_trk
, no_rec
, cmd
, reclen
);
578 ccw
->cmd_code
= DASD_ECKD_CCW_LOCATE_RECORD
;
581 ccw
->cda
= (__u32
) __pa(data
);
583 memset(data
, 0, sizeof(struct LO_eckd_data
));
586 switch (private->rdc_data
.dev_type
) {
588 dn
= ceil_quot(reclen
+ 6, 232);
589 d
= 9 + ceil_quot(reclen
+ 6 * (dn
+ 1), 34);
590 sector
= (49 + (rec_on_trk
- 1) * (10 + d
)) / 8;
593 d
= 7 + ceil_quot(reclen
+ 12, 32);
594 sector
= (39 + (rec_on_trk
- 1) * (8 + d
)) / 7;
598 data
->sector
= sector
;
599 data
->count
= no_rec
;
601 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS
:
602 data
->operation
.orientation
= 0x3;
603 data
->operation
.operation
= 0x03;
605 case DASD_ECKD_CCW_READ_HOME_ADDRESS
:
606 data
->operation
.orientation
= 0x3;
607 data
->operation
.operation
= 0x16;
609 case DASD_ECKD_CCW_WRITE_RECORD_ZERO
:
610 data
->operation
.orientation
= 0x1;
611 data
->operation
.operation
= 0x03;
614 case DASD_ECKD_CCW_READ_RECORD_ZERO
:
615 data
->operation
.orientation
= 0x3;
616 data
->operation
.operation
= 0x16;
619 case DASD_ECKD_CCW_WRITE
:
620 case DASD_ECKD_CCW_WRITE_MT
:
621 case DASD_ECKD_CCW_WRITE_KD
:
622 case DASD_ECKD_CCW_WRITE_KD_MT
:
623 data
->auxiliary
.last_bytes_used
= 0x1;
624 data
->length
= reclen
;
625 data
->operation
.operation
= 0x01;
627 case DASD_ECKD_CCW_WRITE_CKD
:
628 case DASD_ECKD_CCW_WRITE_CKD_MT
:
629 data
->auxiliary
.last_bytes_used
= 0x1;
630 data
->length
= reclen
;
631 data
->operation
.operation
= 0x03;
633 case DASD_ECKD_CCW_READ
:
634 case DASD_ECKD_CCW_READ_MT
:
635 case DASD_ECKD_CCW_READ_KD
:
636 case DASD_ECKD_CCW_READ_KD_MT
:
637 data
->auxiliary
.last_bytes_used
= 0x1;
638 data
->length
= reclen
;
639 data
->operation
.operation
= 0x06;
641 case DASD_ECKD_CCW_READ_CKD
:
642 case DASD_ECKD_CCW_READ_CKD_MT
:
643 data
->auxiliary
.last_bytes_used
= 0x1;
644 data
->length
= reclen
;
645 data
->operation
.operation
= 0x16;
647 case DASD_ECKD_CCW_READ_COUNT
:
648 data
->operation
.operation
= 0x06;
650 case DASD_ECKD_CCW_ERASE
:
651 data
->length
= reclen
;
652 data
->auxiliary
.last_bytes_used
= 0x1;
653 data
->operation
.operation
= 0x0b;
656 DBF_DEV_EVENT(DBF_ERR
, device
, "unknown locate record "
659 set_ch_t(&data
->seek_addr
,
660 trk
/ private->rdc_data
.trk_per_cyl
,
661 trk
% private->rdc_data
.trk_per_cyl
);
662 data
->search_arg
.cyl
= data
->seek_addr
.cyl
;
663 data
->search_arg
.head
= data
->seek_addr
.head
;
664 data
->search_arg
.record
= rec_on_trk
;
668 * Returns 1 if the block is one of the special blocks that needs
669 * to get read/written with the KD variant of the command.
670 * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and
671 * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT.
672 * Luckily the KD variants differ only by one bit (0x08) from the
673 * normal variant. So don't wonder about code like:
674 * if (dasd_eckd_cdl_special(blk_per_trk, recid))
675 * ccw->cmd_code |= 0x8;
678 dasd_eckd_cdl_special(int blk_per_trk
, int recid
)
682 if (recid
< blk_per_trk
)
684 if (recid
< 2 * blk_per_trk
)
690 * Returns the record size for the special blocks of the cdl format.
691 * Only returns something useful if dasd_eckd_cdl_special is true
695 dasd_eckd_cdl_reclen(int recid
)
698 return sizes_trk0
[recid
];
701 /* create unique id from private structure. */
702 static void create_uid(struct dasd_eckd_private
*private)
705 struct dasd_uid
*uid
;
708 memset(uid
, 0, sizeof(struct dasd_uid
));
709 memcpy(uid
->vendor
, private->ned
->HDA_manufacturer
,
710 sizeof(uid
->vendor
) - 1);
711 EBCASC(uid
->vendor
, sizeof(uid
->vendor
) - 1);
712 memcpy(uid
->serial
, private->ned
->HDA_location
,
713 sizeof(uid
->serial
) - 1);
714 EBCASC(uid
->serial
, sizeof(uid
->serial
) - 1);
715 uid
->ssid
= private->gneq
->subsystemID
;
716 uid
->real_unit_addr
= private->ned
->unit_addr
;
718 uid
->type
= private->sneq
->sua_flags
;
719 if (uid
->type
== UA_BASE_PAV_ALIAS
)
720 uid
->base_unit_addr
= private->sneq
->base_unit_addr
;
722 uid
->type
= UA_BASE_DEVICE
;
724 if (private->vdsneq
) {
725 for (count
= 0; count
< 16; count
++) {
726 sprintf(uid
->vduit
+2*count
, "%02x",
727 private->vdsneq
->uit
[count
]);
733 * Generate device unique id that specifies the physical device.
735 static int dasd_eckd_generate_uid(struct dasd_device
*device
)
737 struct dasd_eckd_private
*private = device
->private;
742 if (!private->ned
|| !private->gneq
)
744 spin_lock_irqsave(get_ccwdev_lock(device
->cdev
), flags
);
746 spin_unlock_irqrestore(get_ccwdev_lock(device
->cdev
), flags
);
750 static int dasd_eckd_get_uid(struct dasd_device
*device
, struct dasd_uid
*uid
)
752 struct dasd_eckd_private
*private = device
->private;
756 spin_lock_irqsave(get_ccwdev_lock(device
->cdev
), flags
);
758 spin_unlock_irqrestore(get_ccwdev_lock(device
->cdev
), flags
);
765 * compare device UID with data of a given dasd_eckd_private structure
768 static int dasd_eckd_compare_path_uid(struct dasd_device
*device
,
769 struct dasd_eckd_private
*private)
771 struct dasd_uid device_uid
;
774 dasd_eckd_get_uid(device
, &device_uid
);
776 return memcmp(&device_uid
, &private->uid
, sizeof(struct dasd_uid
));
779 static void dasd_eckd_fill_rcd_cqr(struct dasd_device
*device
,
780 struct dasd_ccw_req
*cqr
,
786 * buffer has to start with EBCDIC "V1.0" to show
787 * support for virtual device SNEQ
789 rcd_buffer
[0] = 0xE5;
790 rcd_buffer
[1] = 0xF1;
791 rcd_buffer
[2] = 0x4B;
792 rcd_buffer
[3] = 0xF0;
795 ccw
->cmd_code
= DASD_ECKD_CCW_RCD
;
797 ccw
->cda
= (__u32
)(addr_t
)rcd_buffer
;
798 ccw
->count
= DASD_ECKD_RCD_DATA_SIZE
;
799 cqr
->magic
= DASD_ECKD_MAGIC
;
801 cqr
->startdev
= device
;
802 cqr
->memdev
= device
;
804 cqr
->expires
= 10*HZ
;
807 cqr
->buildclk
= get_tod_clock();
808 cqr
->status
= DASD_CQR_FILLED
;
809 set_bit(DASD_CQR_VERIFY_PATH
, &cqr
->flags
);
813 * Wakeup helper for read_conf
814 * if the cqr is not done and needs some error recovery
815 * the buffer has to be re-initialized with the EBCDIC "V1.0"
816 * to show support for virtual device SNEQ
818 static void read_conf_cb(struct dasd_ccw_req
*cqr
, void *data
)
823 if (cqr
->status
!= DASD_CQR_DONE
) {
825 rcd_buffer
= (__u8
*)((addr_t
) ccw
->cda
);
826 memset(rcd_buffer
, 0, sizeof(*rcd_buffer
));
828 rcd_buffer
[0] = 0xE5;
829 rcd_buffer
[1] = 0xF1;
830 rcd_buffer
[2] = 0x4B;
831 rcd_buffer
[3] = 0xF0;
833 dasd_wakeup_cb(cqr
, data
);
836 static int dasd_eckd_read_conf_immediately(struct dasd_device
*device
,
837 struct dasd_ccw_req
*cqr
,
844 * sanity check: scan for RCD command in extended SenseID data
845 * some devices do not support RCD
847 ciw
= ccw_device_get_ciw(device
->cdev
, CIW_TYPE_RCD
);
848 if (!ciw
|| ciw
->cmd
!= DASD_ECKD_CCW_RCD
)
851 dasd_eckd_fill_rcd_cqr(device
, cqr
, rcd_buffer
, lpm
);
852 clear_bit(DASD_CQR_FLAGS_USE_ERP
, &cqr
->flags
);
853 set_bit(DASD_CQR_ALLOW_SLOCK
, &cqr
->flags
);
855 cqr
->callback
= read_conf_cb
;
856 rc
= dasd_sleep_on_immediatly(cqr
);
860 static int dasd_eckd_read_conf_lpm(struct dasd_device
*device
,
862 int *rcd_buffer_size
, __u8 lpm
)
865 char *rcd_buf
= NULL
;
867 struct dasd_ccw_req
*cqr
;
870 * sanity check: scan for RCD command in extended SenseID data
871 * some devices do not support RCD
873 ciw
= ccw_device_get_ciw(device
->cdev
, CIW_TYPE_RCD
);
874 if (!ciw
|| ciw
->cmd
!= DASD_ECKD_CCW_RCD
) {
878 rcd_buf
= kzalloc(DASD_ECKD_RCD_DATA_SIZE
, GFP_KERNEL
| GFP_DMA
);
883 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1 /* RCD */,
884 0, /* use rcd_buf as data ara */
887 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
888 "Could not allocate RCD request");
892 dasd_eckd_fill_rcd_cqr(device
, cqr
, rcd_buf
, lpm
);
893 cqr
->callback
= read_conf_cb
;
894 ret
= dasd_sleep_on(cqr
);
896 * on success we update the user input parms
898 dasd_sfree_request(cqr
, cqr
->memdev
);
902 *rcd_buffer_size
= DASD_ECKD_RCD_DATA_SIZE
;
903 *rcd_buffer
= rcd_buf
;
908 *rcd_buffer_size
= 0;
912 static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private
*private)
915 struct dasd_sneq
*sneq
;
919 private->sneq
= NULL
;
920 private->vdsneq
= NULL
;
921 private->gneq
= NULL
;
922 count
= private->conf_len
/ sizeof(struct dasd_sneq
);
923 sneq
= (struct dasd_sneq
*)private->conf_data
;
924 for (i
= 0; i
< count
; ++i
) {
925 if (sneq
->flags
.identifier
== 1 && sneq
->format
== 1)
926 private->sneq
= sneq
;
927 else if (sneq
->flags
.identifier
== 1 && sneq
->format
== 4)
928 private->vdsneq
= (struct vd_sneq
*)sneq
;
929 else if (sneq
->flags
.identifier
== 2)
930 private->gneq
= (struct dasd_gneq
*)sneq
;
931 else if (sneq
->flags
.identifier
== 3 && sneq
->res1
== 1)
932 private->ned
= (struct dasd_ned
*)sneq
;
935 if (!private->ned
|| !private->gneq
) {
937 private->sneq
= NULL
;
938 private->vdsneq
= NULL
;
939 private->gneq
= NULL
;
946 static unsigned char dasd_eckd_path_access(void *conf_data
, int conf_len
)
948 struct dasd_gneq
*gneq
;
951 count
= conf_len
/ sizeof(*gneq
);
952 gneq
= (struct dasd_gneq
*)conf_data
;
954 for (i
= 0; i
< count
; ++i
) {
955 if (gneq
->flags
.identifier
== 2) {
962 return ((char *)gneq
)[18] & 0x07;
967 static void dasd_eckd_clear_conf_data(struct dasd_device
*device
)
969 struct dasd_eckd_private
*private = device
->private;
972 private->conf_data
= NULL
;
973 private->conf_len
= 0;
974 for (i
= 0; i
< 8; i
++) {
975 kfree(device
->path
[i
].conf_data
);
976 device
->path
[i
].conf_data
= NULL
;
977 device
->path
[i
].cssid
= 0;
978 device
->path
[i
].ssid
= 0;
979 device
->path
[i
].chpid
= 0;
984 static int dasd_eckd_read_conf(struct dasd_device
*device
)
987 int conf_len
, conf_data_saved
;
988 int rc
, path_err
, pos
;
990 struct dasd_eckd_private
*private, path_private
;
991 struct dasd_uid
*uid
;
992 char print_path_uid
[60], print_device_uid
[60];
993 struct channel_path_desc
*chp_desc
;
994 struct subchannel_id sch_id
;
996 private = device
->private;
997 opm
= ccw_device_get_path_mask(device
->cdev
);
998 ccw_device_get_schid(device
->cdev
, &sch_id
);
1001 /* get configuration data per operational path */
1002 for (lpm
= 0x80; lpm
; lpm
>>= 1) {
1005 rc
= dasd_eckd_read_conf_lpm(device
, &conf_data
,
1007 if (rc
&& rc
!= -EOPNOTSUPP
) { /* -EOPNOTSUPP is ok */
1008 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
,
1009 "Read configuration data returned "
1013 if (conf_data
== NULL
) {
1014 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
, "%s",
1015 "No configuration data "
1017 /* no further analysis possible */
1018 dasd_path_add_opm(device
, opm
);
1019 continue; /* no error */
1021 /* save first valid configuration data */
1022 if (!conf_data_saved
) {
1023 /* initially clear previously stored conf_data */
1024 dasd_eckd_clear_conf_data(device
);
1025 private->conf_data
= conf_data
;
1026 private->conf_len
= conf_len
;
1027 if (dasd_eckd_identify_conf_parts(private)) {
1028 private->conf_data
= NULL
;
1029 private->conf_len
= 0;
1033 pos
= pathmask_to_pos(lpm
);
1034 /* store per path conf_data */
1035 device
->path
[pos
].conf_data
= conf_data
;
1036 device
->path
[pos
].cssid
= sch_id
.cssid
;
1037 device
->path
[pos
].ssid
= sch_id
.ssid
;
1038 chp_desc
= ccw_device_get_chp_desc(device
->cdev
, pos
);
1040 device
->path
[pos
].chpid
= chp_desc
->chpid
;
1043 * build device UID that other path data
1044 * can be compared to it
1046 dasd_eckd_generate_uid(device
);
1049 path_private
.conf_data
= conf_data
;
1050 path_private
.conf_len
= DASD_ECKD_RCD_DATA_SIZE
;
1051 if (dasd_eckd_identify_conf_parts(
1053 path_private
.conf_data
= NULL
;
1054 path_private
.conf_len
= 0;
1058 if (dasd_eckd_compare_path_uid(
1059 device
, &path_private
)) {
1060 uid
= &path_private
.uid
;
1061 if (strlen(uid
->vduit
) > 0)
1062 snprintf(print_path_uid
,
1063 sizeof(print_path_uid
),
1064 "%s.%s.%04x.%02x.%s",
1065 uid
->vendor
, uid
->serial
,
1066 uid
->ssid
, uid
->real_unit_addr
,
1069 snprintf(print_path_uid
,
1070 sizeof(print_path_uid
),
1072 uid
->vendor
, uid
->serial
,
1074 uid
->real_unit_addr
);
1075 uid
= &private->uid
;
1076 if (strlen(uid
->vduit
) > 0)
1077 snprintf(print_device_uid
,
1078 sizeof(print_device_uid
),
1079 "%s.%s.%04x.%02x.%s",
1080 uid
->vendor
, uid
->serial
,
1081 uid
->ssid
, uid
->real_unit_addr
,
1084 snprintf(print_device_uid
,
1085 sizeof(print_device_uid
),
1087 uid
->vendor
, uid
->serial
,
1089 uid
->real_unit_addr
);
1090 dev_err(&device
->cdev
->dev
,
1091 "Not all channel paths lead to "
1092 "the same device, path %02X leads to "
1093 "device %s instead of %s\n", lpm
,
1094 print_path_uid
, print_device_uid
);
1096 dasd_path_add_cablepm(device
, lpm
);
1099 pos
= pathmask_to_pos(lpm
);
1100 /* store per path conf_data */
1101 device
->path
[pos
].conf_data
= conf_data
;
1102 device
->path
[pos
].cssid
= sch_id
.cssid
;
1103 device
->path
[pos
].ssid
= sch_id
.ssid
;
1104 chp_desc
= ccw_device_get_chp_desc(device
->cdev
, pos
);
1106 device
->path
[pos
].chpid
= chp_desc
->chpid
;
1108 path_private
.conf_data
= NULL
;
1109 path_private
.conf_len
= 0;
1111 switch (dasd_eckd_path_access(conf_data
, conf_len
)) {
1113 dasd_path_add_nppm(device
, lpm
);
1116 dasd_path_add_ppm(device
, lpm
);
1119 if (!dasd_path_get_opm(device
)) {
1120 dasd_path_set_opm(device
, lpm
);
1121 dasd_generic_path_operational(device
);
1123 dasd_path_add_opm(device
, lpm
);
1130 static u32
get_fcx_max_data(struct dasd_device
*device
)
1132 struct dasd_eckd_private
*private = device
->private;
1133 int fcx_in_css
, fcx_in_gneq
, fcx_in_features
;
1138 /* is transport mode supported? */
1139 fcx_in_css
= css_general_characteristics
.fcx
;
1140 fcx_in_gneq
= private->gneq
->reserved2
[7] & 0x04;
1141 fcx_in_features
= private->features
.feature
[40] & 0x80;
1142 tpm
= fcx_in_css
&& fcx_in_gneq
&& fcx_in_features
;
1147 mdc
= ccw_device_get_mdc(device
->cdev
, 0);
1149 dev_warn(&device
->cdev
->dev
, "Detecting the maximum supported data size for zHPF requests failed\n");
1152 return (u32
)mdc
* FCX_MAX_DATA_FACTOR
;
1156 static int verify_fcx_max_data(struct dasd_device
*device
, __u8 lpm
)
1158 struct dasd_eckd_private
*private = device
->private;
1162 if (private->fcx_max_data
) {
1163 mdc
= ccw_device_get_mdc(device
->cdev
, lpm
);
1165 dev_warn(&device
->cdev
->dev
,
1166 "Detecting the maximum data size for zHPF "
1167 "requests failed (rc=%d) for a new path %x\n",
1171 fcx_max_data
= (u32
)mdc
* FCX_MAX_DATA_FACTOR
;
1172 if (fcx_max_data
< private->fcx_max_data
) {
1173 dev_warn(&device
->cdev
->dev
,
1174 "The maximum data size for zHPF requests %u "
1175 "on a new path %x is below the active maximum "
1176 "%u\n", fcx_max_data
, lpm
,
1177 private->fcx_max_data
);
1184 static int rebuild_device_uid(struct dasd_device
*device
,
1185 struct path_verification_work_data
*data
)
1187 struct dasd_eckd_private
*private = device
->private;
1188 __u8 lpm
, opm
= dasd_path_get_opm(device
);
1191 for (lpm
= 0x80; lpm
; lpm
>>= 1) {
1194 memset(&data
->rcd_buffer
, 0, sizeof(data
->rcd_buffer
));
1195 memset(&data
->cqr
, 0, sizeof(data
->cqr
));
1196 data
->cqr
.cpaddr
= &data
->ccw
;
1197 rc
= dasd_eckd_read_conf_immediately(device
, &data
->cqr
,
1202 if (rc
== -EOPNOTSUPP
) /* -EOPNOTSUPP is ok */
1204 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
,
1205 "Read configuration data "
1206 "returned error %d", rc
);
1209 memcpy(private->conf_data
, data
->rcd_buffer
,
1210 DASD_ECKD_RCD_DATA_SIZE
);
1211 if (dasd_eckd_identify_conf_parts(private)) {
1213 } else /* first valid path is enough */
1218 rc
= dasd_eckd_generate_uid(device
);
1223 static void do_path_verification_work(struct work_struct
*work
)
1225 struct path_verification_work_data
*data
;
1226 struct dasd_device
*device
;
1227 struct dasd_eckd_private path_private
;
1228 struct dasd_uid
*uid
;
1229 __u8 path_rcd_buf
[DASD_ECKD_RCD_DATA_SIZE
];
1230 __u8 lpm
, opm
, npm
, ppm
, epm
, hpfpm
, cablepm
;
1231 unsigned long flags
;
1235 data
= container_of(work
, struct path_verification_work_data
, worker
);
1236 device
= data
->device
;
1238 /* delay path verification until device was resumed */
1239 if (test_bit(DASD_FLAG_SUSPENDED
, &device
->flags
)) {
1240 schedule_work(work
);
1243 /* check if path verification already running and delay if so */
1244 if (test_and_set_bit(DASD_FLAG_PATH_VERIFY
, &device
->flags
)) {
1245 schedule_work(work
);
1255 for (lpm
= 0x80; lpm
; lpm
>>= 1) {
1256 if (!(lpm
& data
->tbvpm
))
1258 memset(&data
->rcd_buffer
, 0, sizeof(data
->rcd_buffer
));
1259 memset(&data
->cqr
, 0, sizeof(data
->cqr
));
1260 data
->cqr
.cpaddr
= &data
->ccw
;
1261 rc
= dasd_eckd_read_conf_immediately(device
, &data
->cqr
,
1265 switch (dasd_eckd_path_access(data
->rcd_buffer
,
1266 DASD_ECKD_RCD_DATA_SIZE
)
1276 } else if (rc
== -EOPNOTSUPP
) {
1277 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
, "%s",
1278 "path verification: No configuration "
1281 } else if (rc
== -EAGAIN
) {
1282 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
, "%s",
1283 "path verification: device is stopped,"
1284 " try again later");
1287 dev_warn(&device
->cdev
->dev
,
1288 "Reading device feature codes failed "
1289 "(rc=%d) for new path %x\n", rc
, lpm
);
1292 if (verify_fcx_max_data(device
, lpm
)) {
1301 * save conf_data for comparison after
1302 * rebuild_device_uid may have changed
1305 memcpy(&path_rcd_buf
, data
->rcd_buffer
,
1306 DASD_ECKD_RCD_DATA_SIZE
);
1307 path_private
.conf_data
= (void *) &path_rcd_buf
;
1308 path_private
.conf_len
= DASD_ECKD_RCD_DATA_SIZE
;
1309 if (dasd_eckd_identify_conf_parts(&path_private
)) {
1310 path_private
.conf_data
= NULL
;
1311 path_private
.conf_len
= 0;
1316 * compare path UID with device UID only if at least
1317 * one valid path is left
1318 * in other case the device UID may have changed and
1319 * the first working path UID will be used as device UID
1321 if (dasd_path_get_opm(device
) &&
1322 dasd_eckd_compare_path_uid(device
, &path_private
)) {
1324 * the comparison was not successful
1325 * rebuild the device UID with at least one
1326 * known path in case a z/VM hyperswap command
1327 * has changed the device
1329 * after this compare again
1331 * if either the rebuild or the recompare fails
1332 * the path can not be used
1334 if (rebuild_device_uid(device
, data
) ||
1335 dasd_eckd_compare_path_uid(
1336 device
, &path_private
)) {
1337 uid
= &path_private
.uid
;
1338 if (strlen(uid
->vduit
) > 0)
1339 snprintf(print_uid
, sizeof(print_uid
),
1340 "%s.%s.%04x.%02x.%s",
1341 uid
->vendor
, uid
->serial
,
1342 uid
->ssid
, uid
->real_unit_addr
,
1345 snprintf(print_uid
, sizeof(print_uid
),
1347 uid
->vendor
, uid
->serial
,
1349 uid
->real_unit_addr
);
1350 dev_err(&device
->cdev
->dev
,
1351 "The newly added channel path %02X "
1352 "will not be used because it leads "
1353 "to a different device %s\n",
1364 * There is a small chance that a path is lost again between
1365 * above path verification and the following modification of
1366 * the device opm mask. We could avoid that race here by using
1367 * yet another path mask, but we rather deal with this unlikely
1368 * situation in dasd_start_IO.
1370 spin_lock_irqsave(get_ccwdev_lock(device
->cdev
), flags
);
1371 if (!dasd_path_get_opm(device
) && opm
) {
1372 dasd_path_set_opm(device
, opm
);
1373 dasd_generic_path_operational(device
);
1375 dasd_path_add_opm(device
, opm
);
1377 dasd_path_add_nppm(device
, npm
);
1378 dasd_path_add_ppm(device
, ppm
);
1379 dasd_path_add_tbvpm(device
, epm
);
1380 dasd_path_add_cablepm(device
, cablepm
);
1381 dasd_path_add_nohpfpm(device
, hpfpm
);
1382 spin_unlock_irqrestore(get_ccwdev_lock(device
->cdev
), flags
);
1384 clear_bit(DASD_FLAG_PATH_VERIFY
, &device
->flags
);
1385 dasd_put_device(device
);
1387 mutex_unlock(&dasd_path_verification_mutex
);
1392 static int dasd_eckd_verify_path(struct dasd_device
*device
, __u8 lpm
)
1394 struct path_verification_work_data
*data
;
1396 data
= kmalloc(sizeof(*data
), GFP_ATOMIC
| GFP_DMA
);
1398 if (mutex_trylock(&dasd_path_verification_mutex
)) {
1399 data
= path_verification_worker
;
1404 memset(data
, 0, sizeof(*data
));
1407 INIT_WORK(&data
->worker
, do_path_verification_work
);
1408 dasd_get_device(device
);
1409 data
->device
= device
;
1411 schedule_work(&data
->worker
);
1415 static void dasd_eckd_reset_path(struct dasd_device
*device
, __u8 pm
)
1417 struct dasd_eckd_private
*private = device
->private;
1418 unsigned long flags
;
1420 if (!private->fcx_max_data
)
1421 private->fcx_max_data
= get_fcx_max_data(device
);
1422 spin_lock_irqsave(get_ccwdev_lock(device
->cdev
), flags
);
1423 dasd_path_set_tbvpm(device
, pm
? : dasd_path_get_notoperpm(device
));
1424 dasd_schedule_device_bh(device
);
1425 spin_unlock_irqrestore(get_ccwdev_lock(device
->cdev
), flags
);
1428 static int dasd_eckd_read_features(struct dasd_device
*device
)
1430 struct dasd_eckd_private
*private = device
->private;
1431 struct dasd_psf_prssd_data
*prssdp
;
1432 struct dasd_rssd_features
*features
;
1433 struct dasd_ccw_req
*cqr
;
1437 memset(&private->features
, 0, sizeof(struct dasd_rssd_features
));
1438 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1 /* PSF */ + 1 /* RSSD */,
1439 (sizeof(struct dasd_psf_prssd_data
) +
1440 sizeof(struct dasd_rssd_features
)),
1443 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
, "%s", "Could not "
1444 "allocate initialization request");
1445 return PTR_ERR(cqr
);
1447 cqr
->startdev
= device
;
1448 cqr
->memdev
= device
;
1451 cqr
->expires
= 10 * HZ
;
1453 /* Prepare for Read Subsystem Data */
1454 prssdp
= (struct dasd_psf_prssd_data
*) cqr
->data
;
1455 memset(prssdp
, 0, sizeof(struct dasd_psf_prssd_data
));
1456 prssdp
->order
= PSF_ORDER_PRSSD
;
1457 prssdp
->suborder
= 0x41; /* Read Feature Codes */
1458 /* all other bytes of prssdp must be zero */
1461 ccw
->cmd_code
= DASD_ECKD_CCW_PSF
;
1462 ccw
->count
= sizeof(struct dasd_psf_prssd_data
);
1463 ccw
->flags
|= CCW_FLAG_CC
;
1464 ccw
->cda
= (__u32
)(addr_t
) prssdp
;
1466 /* Read Subsystem Data - feature codes */
1467 features
= (struct dasd_rssd_features
*) (prssdp
+ 1);
1468 memset(features
, 0, sizeof(struct dasd_rssd_features
));
1471 ccw
->cmd_code
= DASD_ECKD_CCW_RSSD
;
1472 ccw
->count
= sizeof(struct dasd_rssd_features
);
1473 ccw
->cda
= (__u32
)(addr_t
) features
;
1475 cqr
->buildclk
= get_tod_clock();
1476 cqr
->status
= DASD_CQR_FILLED
;
1477 rc
= dasd_sleep_on(cqr
);
1479 prssdp
= (struct dasd_psf_prssd_data
*) cqr
->data
;
1480 features
= (struct dasd_rssd_features
*) (prssdp
+ 1);
1481 memcpy(&private->features
, features
,
1482 sizeof(struct dasd_rssd_features
));
1484 dev_warn(&device
->cdev
->dev
, "Reading device feature codes"
1485 " failed with rc=%d\n", rc
);
1486 dasd_sfree_request(cqr
, cqr
->memdev
);
1492 * Build CP for Perform Subsystem Function - SSC.
1494 static struct dasd_ccw_req
*dasd_eckd_build_psf_ssc(struct dasd_device
*device
,
1497 struct dasd_ccw_req
*cqr
;
1498 struct dasd_psf_ssc_data
*psf_ssc_data
;
1501 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1 /* PSF */ ,
1502 sizeof(struct dasd_psf_ssc_data
),
1506 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
1507 "Could not allocate PSF-SSC request");
1510 psf_ssc_data
= (struct dasd_psf_ssc_data
*)cqr
->data
;
1511 psf_ssc_data
->order
= PSF_ORDER_SSC
;
1512 psf_ssc_data
->suborder
= 0xc0;
1514 psf_ssc_data
->suborder
|= 0x08;
1515 psf_ssc_data
->reserved
[0] = 0x88;
1518 ccw
->cmd_code
= DASD_ECKD_CCW_PSF
;
1519 ccw
->cda
= (__u32
)(addr_t
)psf_ssc_data
;
1522 cqr
->startdev
= device
;
1523 cqr
->memdev
= device
;
1526 cqr
->expires
= 10*HZ
;
1527 cqr
->buildclk
= get_tod_clock();
1528 cqr
->status
= DASD_CQR_FILLED
;
1533 * Perform Subsystem Function.
1534 * It is necessary to trigger CIO for channel revalidation since this
1535 * call might change behaviour of DASD devices.
1538 dasd_eckd_psf_ssc(struct dasd_device
*device
, int enable_pav
,
1539 unsigned long flags
)
1541 struct dasd_ccw_req
*cqr
;
1544 cqr
= dasd_eckd_build_psf_ssc(device
, enable_pav
);
1546 return PTR_ERR(cqr
);
1549 * set flags e.g. turn on failfast, to prevent blocking
1550 * the calling function should handle failed requests
1552 cqr
->flags
|= flags
;
1554 rc
= dasd_sleep_on(cqr
);
1556 /* trigger CIO to reprobe devices */
1557 css_schedule_reprobe();
1558 else if (cqr
->intrc
== -EAGAIN
)
1561 dasd_sfree_request(cqr
, cqr
->memdev
);
1566 * Valide storage server of current device.
1568 static int dasd_eckd_validate_server(struct dasd_device
*device
,
1569 unsigned long flags
)
1571 struct dasd_eckd_private
*private = device
->private;
1574 if (private->uid
.type
== UA_BASE_PAV_ALIAS
||
1575 private->uid
.type
== UA_HYPER_PAV_ALIAS
)
1577 if (dasd_nopav
|| MACHINE_IS_VM
)
1581 rc
= dasd_eckd_psf_ssc(device
, enable_pav
, flags
);
1583 /* may be requested feature is not available on server,
1584 * therefore just report error and go ahead */
1585 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
, "PSF-SSC for SSID %04x "
1586 "returned rc=%d", private->uid
.ssid
, rc
);
1591 * worker to do a validate server in case of a lost pathgroup
1593 static void dasd_eckd_do_validate_server(struct work_struct
*work
)
1595 struct dasd_device
*device
= container_of(work
, struct dasd_device
,
1597 unsigned long flags
= 0;
1599 set_bit(DASD_CQR_FLAGS_FAILFAST
, &flags
);
1600 if (dasd_eckd_validate_server(device
, flags
)
1602 /* schedule worker again if failed */
1603 schedule_work(&device
->kick_validate
);
1607 dasd_put_device(device
);
1610 static void dasd_eckd_kick_validate_server(struct dasd_device
*device
)
1612 dasd_get_device(device
);
1613 /* exit if device not online or in offline processing */
1614 if (test_bit(DASD_FLAG_OFFLINE
, &device
->flags
) ||
1615 device
->state
< DASD_STATE_ONLINE
) {
1616 dasd_put_device(device
);
1619 /* queue call to do_validate_server to the kernel event daemon. */
1620 if (!schedule_work(&device
->kick_validate
))
1621 dasd_put_device(device
);
1625 * Check device characteristics.
1626 * If the device is accessible using ECKD discipline, the device is enabled.
1629 dasd_eckd_check_characteristics(struct dasd_device
*device
)
1631 struct dasd_eckd_private
*private = device
->private;
1632 struct dasd_block
*block
;
1633 struct dasd_uid temp_uid
;
1636 unsigned long value
;
1638 /* setup work queue for validate server*/
1639 INIT_WORK(&device
->kick_validate
, dasd_eckd_do_validate_server
);
1640 /* setup work queue for summary unit check */
1641 INIT_WORK(&device
->suc_work
, dasd_alias_handle_summary_unit_check
);
1643 if (!ccw_device_is_pathgroup(device
->cdev
)) {
1644 dev_warn(&device
->cdev
->dev
,
1645 "A channel path group could not be established\n");
1648 if (!ccw_device_is_multipath(device
->cdev
)) {
1649 dev_info(&device
->cdev
->dev
,
1650 "The DASD is not operating in multipath mode\n");
1653 private = kzalloc(sizeof(*private), GFP_KERNEL
| GFP_DMA
);
1655 dev_warn(&device
->cdev
->dev
,
1656 "Allocating memory for private DASD data "
1660 device
->private = private;
1662 memset(private, 0, sizeof(*private));
1664 /* Invalidate status of initial analysis. */
1665 private->init_cqr_status
= -1;
1666 /* Set default cache operations. */
1667 private->attrib
.operation
= DASD_NORMAL_CACHE
;
1668 private->attrib
.nr_cyl
= 0;
1670 /* Read Configuration Data */
1671 rc
= dasd_eckd_read_conf(device
);
1675 /* set some default values */
1676 device
->default_expires
= DASD_EXPIRES
;
1677 device
->default_retries
= DASD_RETRIES
;
1678 device
->path_thrhld
= DASD_ECKD_PATH_THRHLD
;
1679 device
->path_interval
= DASD_ECKD_PATH_INTERVAL
;
1681 if (private->gneq
) {
1683 for (i
= 0; i
< private->gneq
->timeout
.value
; i
++)
1685 value
= value
* private->gneq
->timeout
.number
;
1686 /* do not accept useless values */
1687 if (value
!= 0 && value
<= DASD_EXPIRES_MAX
)
1688 device
->default_expires
= value
;
1691 dasd_eckd_get_uid(device
, &temp_uid
);
1692 if (temp_uid
.type
== UA_BASE_DEVICE
) {
1693 block
= dasd_alloc_block();
1694 if (IS_ERR(block
)) {
1695 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
, "%s",
1696 "could not allocate dasd "
1698 rc
= PTR_ERR(block
);
1701 device
->block
= block
;
1702 block
->base
= device
;
1705 /* register lcu with alias handling, enable PAV */
1706 rc
= dasd_alias_make_device_known_to_lcu(device
);
1710 dasd_eckd_validate_server(device
, 0);
1712 /* device may report different configuration data after LCU setup */
1713 rc
= dasd_eckd_read_conf(device
);
1717 /* Read Feature Codes */
1718 dasd_eckd_read_features(device
);
1720 /* Read Device Characteristics */
1721 rc
= dasd_generic_read_dev_chars(device
, DASD_ECKD_MAGIC
,
1722 &private->rdc_data
, 64);
1724 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
,
1725 "Read device characteristic failed, rc=%d", rc
);
1729 if ((device
->features
& DASD_FEATURE_USERAW
) &&
1730 !(private->rdc_data
.facilities
.RT_in_LR
)) {
1731 dev_err(&device
->cdev
->dev
, "The storage server does not "
1732 "support raw-track access\n");
1737 /* find the valid cylinder size */
1738 if (private->rdc_data
.no_cyl
== LV_COMPAT_CYL
&&
1739 private->rdc_data
.long_no_cyl
)
1740 private->real_cyl
= private->rdc_data
.long_no_cyl
;
1742 private->real_cyl
= private->rdc_data
.no_cyl
;
1744 private->fcx_max_data
= get_fcx_max_data(device
);
1746 readonly
= dasd_device_is_ro(device
);
1748 set_bit(DASD_FLAG_DEVICE_RO
, &device
->flags
);
1750 dev_info(&device
->cdev
->dev
, "New DASD %04X/%02X (CU %04X/%02X) "
1751 "with %d cylinders, %d heads, %d sectors%s\n",
1752 private->rdc_data
.dev_type
,
1753 private->rdc_data
.dev_model
,
1754 private->rdc_data
.cu_type
,
1755 private->rdc_data
.cu_model
.model
,
1757 private->rdc_data
.trk_per_cyl
,
1758 private->rdc_data
.sec_per_trk
,
1759 readonly
? ", read-only device" : "");
1763 dasd_alias_disconnect_device_from_lcu(device
);
1765 dasd_free_block(device
->block
);
1766 device
->block
= NULL
;
1768 kfree(private->conf_data
);
1769 kfree(device
->private);
1770 device
->private = NULL
;
1774 static void dasd_eckd_uncheck_device(struct dasd_device
*device
)
1776 struct dasd_eckd_private
*private = device
->private;
1779 dasd_alias_disconnect_device_from_lcu(device
);
1780 private->ned
= NULL
;
1781 private->sneq
= NULL
;
1782 private->vdsneq
= NULL
;
1783 private->gneq
= NULL
;
1784 private->conf_len
= 0;
1785 for (i
= 0; i
< 8; i
++) {
1786 kfree(device
->path
[i
].conf_data
);
1787 if ((__u8
*)device
->path
[i
].conf_data
==
1788 private->conf_data
) {
1789 private->conf_data
= NULL
;
1790 private->conf_len
= 0;
1792 device
->path
[i
].conf_data
= NULL
;
1793 device
->path
[i
].cssid
= 0;
1794 device
->path
[i
].ssid
= 0;
1795 device
->path
[i
].chpid
= 0;
1797 kfree(private->conf_data
);
1798 private->conf_data
= NULL
;
1801 static struct dasd_ccw_req
*
1802 dasd_eckd_analysis_ccw(struct dasd_device
*device
)
1804 struct dasd_eckd_private
*private = device
->private;
1805 struct eckd_count
*count_data
;
1806 struct LO_eckd_data
*LO_data
;
1807 struct dasd_ccw_req
*cqr
;
1809 int cplength
, datasize
;
1813 datasize
= sizeof(struct DE_eckd_data
) + 2*sizeof(struct LO_eckd_data
);
1814 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, cplength
, datasize
, device
);
1818 /* Define extent for the first 3 tracks. */
1819 define_extent(ccw
++, cqr
->data
, 0, 2,
1820 DASD_ECKD_CCW_READ_COUNT
, device
, 0);
1821 LO_data
= cqr
->data
+ sizeof(struct DE_eckd_data
);
1822 /* Locate record for the first 4 records on track 0. */
1823 ccw
[-1].flags
|= CCW_FLAG_CC
;
1824 locate_record(ccw
++, LO_data
++, 0, 0, 4,
1825 DASD_ECKD_CCW_READ_COUNT
, device
, 0);
1827 count_data
= private->count_area
;
1828 for (i
= 0; i
< 4; i
++) {
1829 ccw
[-1].flags
|= CCW_FLAG_CC
;
1830 ccw
->cmd_code
= DASD_ECKD_CCW_READ_COUNT
;
1833 ccw
->cda
= (__u32
)(addr_t
) count_data
;
1838 /* Locate record for the first record on track 2. */
1839 ccw
[-1].flags
|= CCW_FLAG_CC
;
1840 locate_record(ccw
++, LO_data
++, 2, 0, 1,
1841 DASD_ECKD_CCW_READ_COUNT
, device
, 0);
1842 /* Read count ccw. */
1843 ccw
[-1].flags
|= CCW_FLAG_CC
;
1844 ccw
->cmd_code
= DASD_ECKD_CCW_READ_COUNT
;
1847 ccw
->cda
= (__u32
)(addr_t
) count_data
;
1850 cqr
->startdev
= device
;
1851 cqr
->memdev
= device
;
1853 cqr
->buildclk
= get_tod_clock();
1854 cqr
->status
= DASD_CQR_FILLED
;
1858 /* differentiate between 'no record found' and any other error */
1859 static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req
*init_cqr
)
1862 if (init_cqr
->status
== DASD_CQR_DONE
)
1864 else if (init_cqr
->status
== DASD_CQR_NEED_ERP
||
1865 init_cqr
->status
== DASD_CQR_FAILED
) {
1866 sense
= dasd_get_sense(&init_cqr
->irb
);
1867 if (sense
&& (sense
[1] & SNS1_NO_REC_FOUND
))
1868 return INIT_CQR_UNFORMATTED
;
1870 return INIT_CQR_ERROR
;
1872 return INIT_CQR_ERROR
;
1876 * This is the callback function for the init_analysis cqr. It saves
1877 * the status of the initial analysis ccw before it frees it and kicks
1878 * the device to continue the startup sequence. This will call
1879 * dasd_eckd_do_analysis again (if the devices has not been marked
1880 * for deletion in the meantime).
1882 static void dasd_eckd_analysis_callback(struct dasd_ccw_req
*init_cqr
,
1885 struct dasd_device
*device
= init_cqr
->startdev
;
1886 struct dasd_eckd_private
*private = device
->private;
1888 private->init_cqr_status
= dasd_eckd_analysis_evaluation(init_cqr
);
1889 dasd_sfree_request(init_cqr
, device
);
1890 dasd_kick_device(device
);
1893 static int dasd_eckd_start_analysis(struct dasd_block
*block
)
1895 struct dasd_ccw_req
*init_cqr
;
1897 init_cqr
= dasd_eckd_analysis_ccw(block
->base
);
1898 if (IS_ERR(init_cqr
))
1899 return PTR_ERR(init_cqr
);
1900 init_cqr
->callback
= dasd_eckd_analysis_callback
;
1901 init_cqr
->callback_data
= NULL
;
1902 init_cqr
->expires
= 5*HZ
;
1903 /* first try without ERP, so we can later handle unformatted
1904 * devices as special case
1906 clear_bit(DASD_CQR_FLAGS_USE_ERP
, &init_cqr
->flags
);
1907 init_cqr
->retries
= 0;
1908 dasd_add_request_head(init_cqr
);
1912 static int dasd_eckd_end_analysis(struct dasd_block
*block
)
1914 struct dasd_device
*device
= block
->base
;
1915 struct dasd_eckd_private
*private = device
->private;
1916 struct eckd_count
*count_area
;
1917 unsigned int sb
, blk_per_trk
;
1919 struct dasd_ccw_req
*init_cqr
;
1921 status
= private->init_cqr_status
;
1922 private->init_cqr_status
= -1;
1923 if (status
== INIT_CQR_ERROR
) {
1924 /* try again, this time with full ERP */
1925 init_cqr
= dasd_eckd_analysis_ccw(device
);
1926 dasd_sleep_on(init_cqr
);
1927 status
= dasd_eckd_analysis_evaluation(init_cqr
);
1928 dasd_sfree_request(init_cqr
, device
);
1931 if (device
->features
& DASD_FEATURE_USERAW
) {
1932 block
->bp_block
= DASD_RAW_BLOCKSIZE
;
1933 blk_per_trk
= DASD_RAW_BLOCK_PER_TRACK
;
1934 block
->s2b_shift
= 3;
1938 if (status
== INIT_CQR_UNFORMATTED
) {
1939 dev_warn(&device
->cdev
->dev
, "The DASD is not formatted\n");
1940 return -EMEDIUMTYPE
;
1941 } else if (status
== INIT_CQR_ERROR
) {
1942 dev_err(&device
->cdev
->dev
,
1943 "Detecting the DASD disk layout failed because "
1944 "of an I/O error\n");
1948 private->uses_cdl
= 1;
1949 /* Check Track 0 for Compatible Disk Layout */
1951 for (i
= 0; i
< 3; i
++) {
1952 if (private->count_area
[i
].kl
!= 4 ||
1953 private->count_area
[i
].dl
!= dasd_eckd_cdl_reclen(i
) - 4 ||
1954 private->count_area
[i
].cyl
!= 0 ||
1955 private->count_area
[i
].head
!= count_area_head
[i
] ||
1956 private->count_area
[i
].record
!= count_area_rec
[i
]) {
1957 private->uses_cdl
= 0;
1962 count_area
= &private->count_area
[4];
1964 if (private->uses_cdl
== 0) {
1965 for (i
= 0; i
< 5; i
++) {
1966 if ((private->count_area
[i
].kl
!= 0) ||
1967 (private->count_area
[i
].dl
!=
1968 private->count_area
[0].dl
) ||
1969 private->count_area
[i
].cyl
!= 0 ||
1970 private->count_area
[i
].head
!= count_area_head
[i
] ||
1971 private->count_area
[i
].record
!= count_area_rec
[i
])
1975 count_area
= &private->count_area
[0];
1977 if (private->count_area
[3].record
== 1)
1978 dev_warn(&device
->cdev
->dev
,
1979 "Track 0 has no records following the VTOC\n");
1982 if (count_area
!= NULL
&& count_area
->kl
== 0) {
1983 /* we found notthing violating our disk layout */
1984 if (dasd_check_blocksize(count_area
->dl
) == 0)
1985 block
->bp_block
= count_area
->dl
;
1987 if (block
->bp_block
== 0) {
1988 dev_warn(&device
->cdev
->dev
,
1989 "The disk layout of the DASD is not supported\n");
1990 return -EMEDIUMTYPE
;
1992 block
->s2b_shift
= 0; /* bits to shift 512 to get a block */
1993 for (sb
= 512; sb
< block
->bp_block
; sb
= sb
<< 1)
1996 blk_per_trk
= recs_per_track(&private->rdc_data
, 0, block
->bp_block
);
1999 block
->blocks
= (private->real_cyl
*
2000 private->rdc_data
.trk_per_cyl
*
2003 dev_info(&device
->cdev
->dev
,
2004 "DASD with %d KB/block, %d KB total size, %d KB/track, "
2005 "%s\n", (block
->bp_block
>> 10),
2006 ((private->real_cyl
*
2007 private->rdc_data
.trk_per_cyl
*
2008 blk_per_trk
* (block
->bp_block
>> 9)) >> 1),
2009 ((blk_per_trk
* block
->bp_block
) >> 10),
2011 "compatible disk layout" : "linux disk layout");
2016 static int dasd_eckd_do_analysis(struct dasd_block
*block
)
2018 struct dasd_eckd_private
*private = block
->base
->private;
2020 if (private->init_cqr_status
< 0)
2021 return dasd_eckd_start_analysis(block
);
2023 return dasd_eckd_end_analysis(block
);
2026 static int dasd_eckd_basic_to_ready(struct dasd_device
*device
)
2028 return dasd_alias_add_device(device
);
2031 static int dasd_eckd_online_to_ready(struct dasd_device
*device
)
2033 cancel_work_sync(&device
->reload_device
);
2034 cancel_work_sync(&device
->kick_validate
);
2038 static int dasd_eckd_basic_to_known(struct dasd_device
*device
)
2040 return dasd_alias_remove_device(device
);
2044 dasd_eckd_fill_geometry(struct dasd_block
*block
, struct hd_geometry
*geo
)
2046 struct dasd_eckd_private
*private = block
->base
->private;
2048 if (dasd_check_blocksize(block
->bp_block
) == 0) {
2049 geo
->sectors
= recs_per_track(&private->rdc_data
,
2050 0, block
->bp_block
);
2052 geo
->cylinders
= private->rdc_data
.no_cyl
;
2053 geo
->heads
= private->rdc_data
.trk_per_cyl
;
2058 * Build the TCW request for the format check
2060 static struct dasd_ccw_req
*
2061 dasd_eckd_build_check_tcw(struct dasd_device
*base
, struct format_data_t
*fdata
,
2062 int enable_pav
, struct eckd_count
*fmt_buffer
,
2065 struct dasd_eckd_private
*start_priv
;
2066 struct dasd_device
*startdev
= NULL
;
2067 struct tidaw
*last_tidaw
= NULL
;
2068 struct dasd_ccw_req
*cqr
;
2076 startdev
= dasd_alias_get_start_dev(base
);
2081 start_priv
= startdev
->private;
2083 count
= rpt
* (fdata
->stop_unit
- fdata
->start_unit
+ 1);
2086 * we're adding 'count' amount of tidaw to the itcw.
2087 * calculate the corresponding itcw_size
2089 itcw_size
= itcw_calc_size(0, count
, 0);
2091 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 0, itcw_size
, startdev
);
2095 start_priv
->count
++;
2097 itcw
= itcw_init(cqr
->data
, itcw_size
, ITCW_OP_READ
, 0, count
, 0);
2103 cqr
->cpaddr
= itcw_get_tcw(itcw
);
2104 rc
= prepare_itcw(itcw
, fdata
->start_unit
, fdata
->stop_unit
,
2105 DASD_ECKD_CCW_READ_COUNT_MT
, base
, startdev
, 0, count
,
2106 sizeof(struct eckd_count
),
2107 count
* sizeof(struct eckd_count
), 0, rpt
);
2111 for (i
= 0; i
< count
; i
++) {
2112 last_tidaw
= itcw_add_tidaw(itcw
, 0, fmt_buffer
++,
2113 sizeof(struct eckd_count
));
2114 if (IS_ERR(last_tidaw
)) {
2120 last_tidaw
->flags
|= TIDAW_FLAGS_LAST
;
2121 itcw_finalize(itcw
);
2124 cqr
->startdev
= startdev
;
2125 cqr
->memdev
= startdev
;
2126 cqr
->basedev
= base
;
2127 cqr
->retries
= startdev
->default_retries
;
2128 cqr
->expires
= startdev
->default_expires
* HZ
;
2129 cqr
->buildclk
= get_tod_clock();
2130 cqr
->status
= DASD_CQR_FILLED
;
2131 /* Set flags to suppress output for expected errors */
2132 set_bit(DASD_CQR_SUPPRESS_FP
, &cqr
->flags
);
2133 set_bit(DASD_CQR_SUPPRESS_IL
, &cqr
->flags
);
2138 dasd_sfree_request(cqr
, startdev
);
2144 * Build the CCW request for the format check
2146 static struct dasd_ccw_req
*
2147 dasd_eckd_build_check(struct dasd_device
*base
, struct format_data_t
*fdata
,
2148 int enable_pav
, struct eckd_count
*fmt_buffer
, int rpt
)
2150 struct dasd_eckd_private
*start_priv
;
2151 struct dasd_eckd_private
*base_priv
;
2152 struct dasd_device
*startdev
= NULL
;
2153 struct dasd_ccw_req
*cqr
;
2156 int cplength
, datasize
;
2162 startdev
= dasd_alias_get_start_dev(base
);
2167 start_priv
= startdev
->private;
2168 base_priv
= base
->private;
2170 count
= rpt
* (fdata
->stop_unit
- fdata
->start_unit
+ 1);
2172 use_prefix
= base_priv
->features
.feature
[8] & 0x01;
2176 datasize
= sizeof(struct PFX_eckd_data
);
2179 datasize
= sizeof(struct DE_eckd_data
) +
2180 sizeof(struct LO_eckd_data
);
2184 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, cplength
, datasize
,
2189 start_priv
->count
++;
2194 prefix_LRE(ccw
++, data
, fdata
->start_unit
, fdata
->stop_unit
,
2195 DASD_ECKD_CCW_READ_COUNT
, base
, startdev
, 1, 0,
2198 define_extent(ccw
++, data
, fdata
->start_unit
, fdata
->stop_unit
,
2199 DASD_ECKD_CCW_READ_COUNT
, startdev
, 0);
2201 data
+= sizeof(struct DE_eckd_data
);
2202 ccw
[-1].flags
|= CCW_FLAG_CC
;
2204 locate_record(ccw
++, data
, fdata
->start_unit
, 0, count
,
2205 DASD_ECKD_CCW_READ_COUNT
, base
, 0);
2208 for (i
= 0; i
< count
; i
++) {
2209 ccw
[-1].flags
|= CCW_FLAG_CC
;
2210 ccw
->cmd_code
= DASD_ECKD_CCW_READ_COUNT
;
2211 ccw
->flags
= CCW_FLAG_SLI
;
2213 ccw
->cda
= (__u32
)(addr_t
) fmt_buffer
;
2218 cqr
->startdev
= startdev
;
2219 cqr
->memdev
= startdev
;
2220 cqr
->basedev
= base
;
2221 cqr
->retries
= DASD_RETRIES
;
2222 cqr
->expires
= startdev
->default_expires
* HZ
;
2223 cqr
->buildclk
= get_tod_clock();
2224 cqr
->status
= DASD_CQR_FILLED
;
2225 /* Set flags to suppress output for expected errors */
2226 set_bit(DASD_CQR_SUPPRESS_NRF
, &cqr
->flags
);
2231 static struct dasd_ccw_req
*
2232 dasd_eckd_build_format(struct dasd_device
*base
,
2233 struct format_data_t
*fdata
,
2236 struct dasd_eckd_private
*base_priv
;
2237 struct dasd_eckd_private
*start_priv
;
2238 struct dasd_device
*startdev
= NULL
;
2239 struct dasd_ccw_req
*fcp
;
2240 struct eckd_count
*ect
;
2241 struct ch_t address
;
2245 int cplength
, datasize
;
2253 startdev
= dasd_alias_get_start_dev(base
);
2258 start_priv
= startdev
->private;
2259 base_priv
= base
->private;
2261 rpt
= recs_per_track(&base_priv
->rdc_data
, 0, fdata
->blksize
);
2263 nr_tracks
= fdata
->stop_unit
- fdata
->start_unit
+ 1;
2266 * fdata->intensity is a bit string that tells us what to do:
2267 * Bit 0: write record zero
2268 * Bit 1: write home address, currently not supported
2269 * Bit 2: invalidate tracks
2270 * Bit 3: use OS/390 compatible disk layout (cdl)
2271 * Bit 4: do not allow storage subsystem to modify record zero
2272 * Only some bit combinations do make sense.
2274 if (fdata
->intensity
& 0x10) {
2276 intensity
= fdata
->intensity
& ~0x10;
2279 intensity
= fdata
->intensity
;
2282 use_prefix
= base_priv
->features
.feature
[8] & 0x01;
2284 switch (intensity
) {
2285 case 0x00: /* Normal format */
2286 case 0x08: /* Normal format, use cdl. */
2287 cplength
= 2 + (rpt
*nr_tracks
);
2289 datasize
= sizeof(struct PFX_eckd_data
) +
2290 sizeof(struct LO_eckd_data
) +
2291 rpt
* nr_tracks
* sizeof(struct eckd_count
);
2293 datasize
= sizeof(struct DE_eckd_data
) +
2294 sizeof(struct LO_eckd_data
) +
2295 rpt
* nr_tracks
* sizeof(struct eckd_count
);
2297 case 0x01: /* Write record zero and format track. */
2298 case 0x09: /* Write record zero and format track, use cdl. */
2299 cplength
= 2 + rpt
* nr_tracks
;
2301 datasize
= sizeof(struct PFX_eckd_data
) +
2302 sizeof(struct LO_eckd_data
) +
2303 sizeof(struct eckd_count
) +
2304 rpt
* nr_tracks
* sizeof(struct eckd_count
);
2306 datasize
= sizeof(struct DE_eckd_data
) +
2307 sizeof(struct LO_eckd_data
) +
2308 sizeof(struct eckd_count
) +
2309 rpt
* nr_tracks
* sizeof(struct eckd_count
);
2311 case 0x04: /* Invalidate track. */
2312 case 0x0c: /* Invalidate track, use cdl. */
2315 datasize
= sizeof(struct PFX_eckd_data
) +
2316 sizeof(struct LO_eckd_data
) +
2317 sizeof(struct eckd_count
);
2319 datasize
= sizeof(struct DE_eckd_data
) +
2320 sizeof(struct LO_eckd_data
) +
2321 sizeof(struct eckd_count
);
2324 dev_warn(&startdev
->cdev
->dev
,
2325 "An I/O control call used incorrect flags 0x%x\n",
2327 return ERR_PTR(-EINVAL
);
2329 /* Allocate the format ccw request. */
2330 fcp
= dasd_smalloc_request(DASD_ECKD_MAGIC
, cplength
,
2331 datasize
, startdev
);
2335 start_priv
->count
++;
2339 switch (intensity
& ~0x08) {
2340 case 0x00: /* Normal format. */
2342 prefix(ccw
++, (struct PFX_eckd_data
*) data
,
2343 fdata
->start_unit
, fdata
->stop_unit
,
2344 DASD_ECKD_CCW_WRITE_CKD
, base
, startdev
);
2345 /* grant subsystem permission to format R0 */
2347 ((struct PFX_eckd_data
*)data
)
2348 ->define_extent
.ga_extended
|= 0x04;
2349 data
+= sizeof(struct PFX_eckd_data
);
2351 define_extent(ccw
++, (struct DE_eckd_data
*) data
,
2352 fdata
->start_unit
, fdata
->stop_unit
,
2353 DASD_ECKD_CCW_WRITE_CKD
, startdev
, 0);
2354 /* grant subsystem permission to format R0 */
2356 ((struct DE_eckd_data
*) data
)
2357 ->ga_extended
|= 0x04;
2358 data
+= sizeof(struct DE_eckd_data
);
2360 ccw
[-1].flags
|= CCW_FLAG_CC
;
2361 locate_record(ccw
++, (struct LO_eckd_data
*) data
,
2362 fdata
->start_unit
, 0, rpt
*nr_tracks
,
2363 DASD_ECKD_CCW_WRITE_CKD
, base
,
2365 data
+= sizeof(struct LO_eckd_data
);
2367 case 0x01: /* Write record zero + format track. */
2369 prefix(ccw
++, (struct PFX_eckd_data
*) data
,
2370 fdata
->start_unit
, fdata
->stop_unit
,
2371 DASD_ECKD_CCW_WRITE_RECORD_ZERO
,
2373 data
+= sizeof(struct PFX_eckd_data
);
2375 define_extent(ccw
++, (struct DE_eckd_data
*) data
,
2376 fdata
->start_unit
, fdata
->stop_unit
,
2377 DASD_ECKD_CCW_WRITE_RECORD_ZERO
, startdev
, 0);
2378 data
+= sizeof(struct DE_eckd_data
);
2380 ccw
[-1].flags
|= CCW_FLAG_CC
;
2381 locate_record(ccw
++, (struct LO_eckd_data
*) data
,
2382 fdata
->start_unit
, 0, rpt
* nr_tracks
+ 1,
2383 DASD_ECKD_CCW_WRITE_RECORD_ZERO
, base
,
2384 base
->block
->bp_block
);
2385 data
+= sizeof(struct LO_eckd_data
);
2387 case 0x04: /* Invalidate track. */
2389 prefix(ccw
++, (struct PFX_eckd_data
*) data
,
2390 fdata
->start_unit
, fdata
->stop_unit
,
2391 DASD_ECKD_CCW_WRITE_CKD
, base
, startdev
);
2392 data
+= sizeof(struct PFX_eckd_data
);
2394 define_extent(ccw
++, (struct DE_eckd_data
*) data
,
2395 fdata
->start_unit
, fdata
->stop_unit
,
2396 DASD_ECKD_CCW_WRITE_CKD
, startdev
, 0);
2397 data
+= sizeof(struct DE_eckd_data
);
2399 ccw
[-1].flags
|= CCW_FLAG_CC
;
2400 locate_record(ccw
++, (struct LO_eckd_data
*) data
,
2401 fdata
->start_unit
, 0, 1,
2402 DASD_ECKD_CCW_WRITE_CKD
, base
, 8);
2403 data
+= sizeof(struct LO_eckd_data
);
2407 for (j
= 0; j
< nr_tracks
; j
++) {
2408 /* calculate cylinder and head for the current track */
2410 (fdata
->start_unit
+ j
) /
2411 base_priv
->rdc_data
.trk_per_cyl
,
2412 (fdata
->start_unit
+ j
) %
2413 base_priv
->rdc_data
.trk_per_cyl
);
2414 if (intensity
& 0x01) { /* write record zero */
2415 ect
= (struct eckd_count
*) data
;
2416 data
+= sizeof(struct eckd_count
);
2417 ect
->cyl
= address
.cyl
;
2418 ect
->head
= address
.head
;
2422 ccw
[-1].flags
|= CCW_FLAG_CC
;
2423 ccw
->cmd_code
= DASD_ECKD_CCW_WRITE_RECORD_ZERO
;
2424 ccw
->flags
= CCW_FLAG_SLI
;
2426 ccw
->cda
= (__u32
)(addr_t
) ect
;
2429 if ((intensity
& ~0x08) & 0x04) { /* erase track */
2430 ect
= (struct eckd_count
*) data
;
2431 data
+= sizeof(struct eckd_count
);
2432 ect
->cyl
= address
.cyl
;
2433 ect
->head
= address
.head
;
2437 ccw
[-1].flags
|= CCW_FLAG_CC
;
2438 ccw
->cmd_code
= DASD_ECKD_CCW_WRITE_CKD
;
2439 ccw
->flags
= CCW_FLAG_SLI
;
2441 ccw
->cda
= (__u32
)(addr_t
) ect
;
2442 } else { /* write remaining records */
2443 for (i
= 0; i
< rpt
; i
++) {
2444 ect
= (struct eckd_count
*) data
;
2445 data
+= sizeof(struct eckd_count
);
2446 ect
->cyl
= address
.cyl
;
2447 ect
->head
= address
.head
;
2448 ect
->record
= i
+ 1;
2450 ect
->dl
= fdata
->blksize
;
2452 * Check for special tracks 0-1
2453 * when formatting CDL
2455 if ((intensity
& 0x08) &&
2456 address
.cyl
== 0 && address
.head
== 0) {
2459 ect
->dl
= sizes_trk0
[i
] - 4;
2462 if ((intensity
& 0x08) &&
2463 address
.cyl
== 0 && address
.head
== 1) {
2465 ect
->dl
= LABEL_SIZE
- 44;
2467 ccw
[-1].flags
|= CCW_FLAG_CC
;
2468 if (i
!= 0 || j
== 0)
2470 DASD_ECKD_CCW_WRITE_CKD
;
2473 DASD_ECKD_CCW_WRITE_CKD_MT
;
2474 ccw
->flags
= CCW_FLAG_SLI
;
2476 ccw
->cda
= (__u32
)(addr_t
) ect
;
2482 fcp
->startdev
= startdev
;
2483 fcp
->memdev
= startdev
;
2484 fcp
->basedev
= base
;
2486 fcp
->expires
= startdev
->default_expires
* HZ
;
2487 fcp
->buildclk
= get_tod_clock();
2488 fcp
->status
= DASD_CQR_FILLED
;
2494 * Wrapper function to build a CCW request depending on input data
2496 static struct dasd_ccw_req
*
2497 dasd_eckd_format_build_ccw_req(struct dasd_device
*base
,
2498 struct format_data_t
*fdata
, int enable_pav
,
2499 int tpm
, struct eckd_count
*fmt_buffer
, int rpt
)
2501 struct dasd_ccw_req
*ccw_req
;
2504 ccw_req
= dasd_eckd_build_format(base
, fdata
, enable_pav
);
2507 ccw_req
= dasd_eckd_build_check_tcw(base
, fdata
,
2511 ccw_req
= dasd_eckd_build_check(base
, fdata
, enable_pav
,
2519 * Sanity checks on format_data
2521 static int dasd_eckd_format_sanity_checks(struct dasd_device
*base
,
2522 struct format_data_t
*fdata
)
2524 struct dasd_eckd_private
*private = base
->private;
2526 if (fdata
->start_unit
>=
2527 (private->real_cyl
* private->rdc_data
.trk_per_cyl
)) {
2528 dev_warn(&base
->cdev
->dev
,
2529 "Start track number %u used in formatting is too big\n",
2533 if (fdata
->stop_unit
>=
2534 (private->real_cyl
* private->rdc_data
.trk_per_cyl
)) {
2535 dev_warn(&base
->cdev
->dev
,
2536 "Stop track number %u used in formatting is too big\n",
2540 if (fdata
->start_unit
> fdata
->stop_unit
) {
2541 dev_warn(&base
->cdev
->dev
,
2542 "Start track %u used in formatting exceeds end track\n",
2546 if (dasd_check_blocksize(fdata
->blksize
) != 0) {
2547 dev_warn(&base
->cdev
->dev
,
2548 "The DASD cannot be formatted with block size %u\n",
2556 * This function will process format_data originally coming from an IOCTL
2558 static int dasd_eckd_format_process_data(struct dasd_device
*base
,
2559 struct format_data_t
*fdata
,
2560 int enable_pav
, int tpm
,
2561 struct eckd_count
*fmt_buffer
, int rpt
,
2564 struct dasd_eckd_private
*private = base
->private;
2565 struct dasd_ccw_req
*cqr
, *n
;
2566 struct list_head format_queue
;
2567 struct dasd_device
*device
;
2569 int old_start
, old_stop
, format_step
;
2573 rc
= dasd_eckd_format_sanity_checks(base
, fdata
);
2577 INIT_LIST_HEAD(&format_queue
);
2579 old_start
= fdata
->start_unit
;
2580 old_stop
= fdata
->stop_unit
;
2582 if (!tpm
&& fmt_buffer
!= NULL
) {
2583 /* Command Mode / Format Check */
2585 } else if (tpm
&& fmt_buffer
!= NULL
) {
2586 /* Transport Mode / Format Check */
2587 format_step
= DASD_CQR_MAX_CCW
/ rpt
;
2589 /* Normal Formatting */
2590 format_step
= DASD_CQR_MAX_CCW
/
2591 recs_per_track(&private->rdc_data
, 0, fdata
->blksize
);
2596 while (fdata
->start_unit
<= old_stop
) {
2597 step
= fdata
->stop_unit
- fdata
->start_unit
+ 1;
2598 if (step
> format_step
) {
2600 fdata
->start_unit
+ format_step
- 1;
2603 cqr
= dasd_eckd_format_build_ccw_req(base
, fdata
,
2608 if (rc
== -ENOMEM
) {
2609 if (list_empty(&format_queue
))
2612 * not enough memory available, start
2613 * requests retry after first requests
2621 list_add_tail(&cqr
->blocklist
, &format_queue
);
2624 step
= fdata
->stop_unit
- fdata
->start_unit
+ 1;
2625 fmt_buffer
+= rpt
* step
;
2627 fdata
->start_unit
= fdata
->stop_unit
+ 1;
2628 fdata
->stop_unit
= old_stop
;
2631 rc
= dasd_sleep_on_queue(&format_queue
);
2634 list_for_each_entry_safe(cqr
, n
, &format_queue
, blocklist
) {
2635 device
= cqr
->startdev
;
2636 private = device
->private;
2638 if (cqr
->status
== DASD_CQR_FAILED
) {
2640 * Only get sense data if called by format
2643 if (fmt_buffer
&& irb
) {
2644 sense
= dasd_get_sense(&cqr
->irb
);
2645 memcpy(irb
, &cqr
->irb
, sizeof(*irb
));
2649 list_del_init(&cqr
->blocklist
);
2650 dasd_sfree_request(cqr
, device
);
2654 if (rc
&& rc
!= -EIO
)
2658 * In case fewer than the expected records are on the
2659 * track, we will most likely get a 'No Record Found'
2660 * error (in command mode) or a 'File Protected' error
2661 * (in transport mode). Those particular cases shouldn't
2662 * pass the -EIO to the IOCTL, therefore reset the rc
2666 (sense
[1] & SNS1_NO_REC_FOUND
||
2667 sense
[1] & SNS1_FILE_PROTECTED
))
2676 fdata
->start_unit
= old_start
;
2677 fdata
->stop_unit
= old_stop
;
2682 static int dasd_eckd_format_device(struct dasd_device
*base
,
2683 struct format_data_t
*fdata
, int enable_pav
)
2685 return dasd_eckd_format_process_data(base
, fdata
, enable_pav
, 0, NULL
,
2690 * Helper function to count consecutive records of a single track.
2692 static int dasd_eckd_count_records(struct eckd_count
*fmt_buffer
, int start
,
2698 head
= fmt_buffer
[start
].head
;
2701 * There are 3 conditions where we stop counting:
2702 * - if data reoccurs (same head and record may reoccur), which may
2703 * happen due to the way DASD_ECKD_CCW_READ_COUNT works
2704 * - when the head changes, because we're iterating over several tracks
2705 * then (DASD_ECKD_CCW_READ_COUNT_MT)
2706 * - when we've reached the end of sensible data in the buffer (the
2707 * record will be 0 then)
2709 for (i
= start
; i
< max
; i
++) {
2711 if ((fmt_buffer
[i
].head
== head
&&
2712 fmt_buffer
[i
].record
== 1) ||
2713 fmt_buffer
[i
].head
!= head
||
2714 fmt_buffer
[i
].record
== 0)
2723 * Evaluate a given range of tracks. Data like number of records, blocksize,
2724 * record ids, and key length are compared with expected data.
2726 * If a mismatch occurs, the corresponding error bit is set, as well as
2727 * additional information, depending on the error.
2729 static void dasd_eckd_format_evaluate_tracks(struct eckd_count
*fmt_buffer
,
2730 struct format_check_t
*cdata
,
2731 int rpt_max
, int rpt_exp
,
2732 int trk_per_cyl
, int tpm
)
2743 trkcount
= cdata
->expect
.stop_unit
- cdata
->expect
.start_unit
+ 1;
2744 max_entries
= trkcount
* rpt_max
;
2746 for (i
= cdata
->expect
.start_unit
; i
<= cdata
->expect
.stop_unit
; i
++) {
2747 /* Calculate the correct next starting position in the buffer */
2749 while (fmt_buffer
[pos
].record
== 0 &&
2750 fmt_buffer
[pos
].dl
== 0) {
2751 if (pos
++ > max_entries
)
2755 if (i
!= cdata
->expect
.start_unit
)
2756 pos
+= rpt_max
- count
;
2759 /* Calculate the expected geo values for the current track */
2760 set_ch_t(&geo
, i
/ trk_per_cyl
, i
% trk_per_cyl
);
2762 /* Count and check number of records */
2763 count
= dasd_eckd_count_records(fmt_buffer
, pos
, pos
+ rpt_max
);
2765 if (count
< rpt_exp
) {
2766 cdata
->result
= DASD_FMT_ERR_TOO_FEW_RECORDS
;
2769 if (count
> rpt_exp
) {
2770 cdata
->result
= DASD_FMT_ERR_TOO_MANY_RECORDS
;
2774 for (j
= 0; j
< count
; j
++, pos
++) {
2775 blksize
= cdata
->expect
.blksize
;
2779 * Set special values when checking CDL formatted
2782 if ((cdata
->expect
.intensity
& 0x08) &&
2783 geo
.cyl
== 0 && geo
.head
== 0) {
2785 blksize
= sizes_trk0
[j
] - 4;
2789 if ((cdata
->expect
.intensity
& 0x08) &&
2790 geo
.cyl
== 0 && geo
.head
== 1) {
2791 blksize
= LABEL_SIZE
- 44;
2795 /* Check blocksize */
2796 if (fmt_buffer
[pos
].dl
!= blksize
) {
2797 cdata
->result
= DASD_FMT_ERR_BLKSIZE
;
2800 /* Check if key length is 0 */
2801 if (fmt_buffer
[pos
].kl
!= kl
) {
2802 cdata
->result
= DASD_FMT_ERR_KEY_LENGTH
;
2805 /* Check if record_id is correct */
2806 if (fmt_buffer
[pos
].cyl
!= geo
.cyl
||
2807 fmt_buffer
[pos
].head
!= geo
.head
||
2808 fmt_buffer
[pos
].record
!= (j
+ 1)) {
2809 cdata
->result
= DASD_FMT_ERR_RECORD_ID
;
2817 * In case of no errors, we need to decrease by one
2818 * to get the correct positions.
2820 if (!cdata
->result
) {
2826 cdata
->num_records
= count
;
2827 cdata
->rec
= fmt_buffer
[pos
].record
;
2828 cdata
->blksize
= fmt_buffer
[pos
].dl
;
2829 cdata
->key_length
= fmt_buffer
[pos
].kl
;
2833 * Check the format of a range of tracks of a DASD.
2835 static int dasd_eckd_check_device_format(struct dasd_device
*base
,
2836 struct format_check_t
*cdata
,
2839 struct dasd_eckd_private
*private = base
->private;
2840 struct eckd_count
*fmt_buffer
;
2842 int rpt_max
, rpt_exp
;
2843 int fmt_buffer_size
;
2849 trk_per_cyl
= private->rdc_data
.trk_per_cyl
;
2851 /* Get maximum and expected amount of records per track */
2852 rpt_max
= recs_per_track(&private->rdc_data
, 0, 512) + 1;
2853 rpt_exp
= recs_per_track(&private->rdc_data
, 0, cdata
->expect
.blksize
);
2855 trkcount
= cdata
->expect
.stop_unit
- cdata
->expect
.start_unit
+ 1;
2856 fmt_buffer_size
= trkcount
* rpt_max
* sizeof(struct eckd_count
);
2858 fmt_buffer
= kzalloc(fmt_buffer_size
, GFP_KERNEL
| GFP_DMA
);
2863 * A certain FICON feature subset is needed to operate in transport
2864 * mode. Additionally, the support for transport mode is implicitly
2865 * checked by comparing the buffer size with fcx_max_data. As long as
2866 * the buffer size is smaller we can operate in transport mode and
2867 * process multiple tracks. If not, only one track at once is being
2868 * processed using command mode.
2870 if ((private->features
.feature
[40] & 0x04) &&
2871 fmt_buffer_size
<= private->fcx_max_data
)
2874 rc
= dasd_eckd_format_process_data(base
, &cdata
->expect
, enable_pav
,
2875 tpm
, fmt_buffer
, rpt_max
, &irb
);
2876 if (rc
&& rc
!= -EIO
)
2880 * If our first attempt with transport mode enabled comes back
2881 * with an incorrect length error, we're going to retry the
2882 * check with command mode.
2884 if (tpm
&& scsw_cstat(&irb
.scsw
) == 0x40) {
2886 rc
= dasd_eckd_format_process_data(base
, &cdata
->expect
,
2888 fmt_buffer
, rpt_max
,
2897 dasd_eckd_format_evaluate_tracks(fmt_buffer
, cdata
, rpt_max
, rpt_exp
,
2906 static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req
*cqr
)
2908 if (cqr
->retries
< 0) {
2909 cqr
->status
= DASD_CQR_FAILED
;
2912 cqr
->status
= DASD_CQR_FILLED
;
2913 if (cqr
->block
&& (cqr
->startdev
!= cqr
->block
->base
)) {
2914 dasd_eckd_reset_ccw_to_base_io(cqr
);
2915 cqr
->startdev
= cqr
->block
->base
;
2916 cqr
->lpm
= dasd_path_get_opm(cqr
->block
->base
);
2920 static dasd_erp_fn_t
2921 dasd_eckd_erp_action(struct dasd_ccw_req
* cqr
)
2923 struct dasd_device
*device
= (struct dasd_device
*) cqr
->startdev
;
2924 struct ccw_device
*cdev
= device
->cdev
;
2926 switch (cdev
->id
.cu_type
) {
2931 return dasd_3990_erp_action
;
2935 return dasd_default_erp_action
;
2939 static dasd_erp_fn_t
2940 dasd_eckd_erp_postaction(struct dasd_ccw_req
* cqr
)
2942 return dasd_default_erp_postaction
;
2945 static void dasd_eckd_check_for_device_change(struct dasd_device
*device
,
2946 struct dasd_ccw_req
*cqr
,
2951 struct dasd_eckd_private
*private = device
->private;
2953 /* first of all check for state change pending interrupt */
2954 mask
= DEV_STAT_ATTENTION
| DEV_STAT_DEV_END
| DEV_STAT_UNIT_EXCEP
;
2955 if ((scsw_dstat(&irb
->scsw
) & mask
) == mask
) {
2957 * for alias only, not in offline processing
2958 * and only if not suspended
2960 if (!device
->block
&& private->lcu
&&
2961 device
->state
== DASD_STATE_ONLINE
&&
2962 !test_bit(DASD_FLAG_OFFLINE
, &device
->flags
) &&
2963 !test_bit(DASD_FLAG_SUSPENDED
, &device
->flags
)) {
2964 /* schedule worker to reload device */
2965 dasd_reload_device(device
);
2967 dasd_generic_handle_state_change(device
);
2971 sense
= dasd_get_sense(irb
);
2975 /* summary unit check */
2976 if ((sense
[27] & DASD_SENSE_BIT_0
) && (sense
[7] == 0x0D) &&
2977 (scsw_dstat(&irb
->scsw
) & DEV_STAT_UNIT_CHECK
)) {
2978 if (test_and_set_bit(DASD_FLAG_SUC
, &device
->flags
)) {
2979 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
2980 "eckd suc: device already notified");
2983 sense
= dasd_get_sense(irb
);
2985 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
2986 "eckd suc: no reason code available");
2987 clear_bit(DASD_FLAG_SUC
, &device
->flags
);
2991 private->suc_reason
= sense
[8];
2992 DBF_DEV_EVENT(DBF_NOTICE
, device
, "%s %x",
2993 "eckd handle summary unit check: reason",
2994 private->suc_reason
);
2995 dasd_get_device(device
);
2996 if (!schedule_work(&device
->suc_work
))
2997 dasd_put_device(device
);
3002 /* service information message SIM */
3003 if (!cqr
&& !(sense
[27] & DASD_SENSE_BIT_0
) &&
3004 ((sense
[6] & DASD_SIM_SENSE
) == DASD_SIM_SENSE
)) {
3005 dasd_3990_erp_handle_sim(device
, sense
);
3009 /* loss of device reservation is handled via base devices only
3010 * as alias devices may be used with several bases
3012 if (device
->block
&& (sense
[27] & DASD_SENSE_BIT_0
) &&
3013 (sense
[7] == 0x3F) &&
3014 (scsw_dstat(&irb
->scsw
) & DEV_STAT_UNIT_CHECK
) &&
3015 test_bit(DASD_FLAG_IS_RESERVED
, &device
->flags
)) {
3016 if (device
->features
& DASD_FEATURE_FAILONSLCK
)
3017 set_bit(DASD_FLAG_LOCK_STOLEN
, &device
->flags
);
3018 clear_bit(DASD_FLAG_IS_RESERVED
, &device
->flags
);
3019 dev_err(&device
->cdev
->dev
,
3020 "The device reservation was lost\n");
3024 static struct dasd_ccw_req
*dasd_eckd_build_cp_cmd_single(
3025 struct dasd_device
*startdev
,
3026 struct dasd_block
*block
,
3027 struct request
*req
,
3032 unsigned int first_offs
,
3033 unsigned int last_offs
,
3034 unsigned int blk_per_trk
,
3035 unsigned int blksize
)
3037 struct dasd_eckd_private
*private;
3038 unsigned long *idaws
;
3039 struct LO_eckd_data
*LO_data
;
3040 struct dasd_ccw_req
*cqr
;
3042 struct req_iterator iter
;
3046 int count
, cidaw
, cplength
, datasize
;
3048 unsigned char cmd
, rcmd
;
3050 struct dasd_device
*basedev
;
3052 basedev
= block
->base
;
3053 private = basedev
->private;
3054 if (rq_data_dir(req
) == READ
)
3055 cmd
= DASD_ECKD_CCW_READ_MT
;
3056 else if (rq_data_dir(req
) == WRITE
)
3057 cmd
= DASD_ECKD_CCW_WRITE_MT
;
3059 return ERR_PTR(-EINVAL
);
3061 /* Check struct bio and count the number of blocks for the request. */
3064 rq_for_each_segment(bv
, req
, iter
) {
3065 if (bv
.bv_len
& (blksize
- 1))
3066 /* Eckd can only do full blocks. */
3067 return ERR_PTR(-EINVAL
);
3068 count
+= bv
.bv_len
>> (block
->s2b_shift
+ 9);
3069 if (idal_is_needed (page_address(bv
.bv_page
), bv
.bv_len
))
3070 cidaw
+= bv
.bv_len
>> (block
->s2b_shift
+ 9);
3073 if (count
!= last_rec
- first_rec
+ 1)
3074 return ERR_PTR(-EINVAL
);
3076 /* use the prefix command if available */
3077 use_prefix
= private->features
.feature
[8] & 0x01;
3079 /* 1x prefix + number of blocks */
3080 cplength
= 2 + count
;
3081 /* 1x prefix + cidaws*sizeof(long) */
3082 datasize
= sizeof(struct PFX_eckd_data
) +
3083 sizeof(struct LO_eckd_data
) +
3084 cidaw
* sizeof(unsigned long);
3086 /* 1x define extent + 1x locate record + number of blocks */
3087 cplength
= 2 + count
;
3088 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */
3089 datasize
= sizeof(struct DE_eckd_data
) +
3090 sizeof(struct LO_eckd_data
) +
3091 cidaw
* sizeof(unsigned long);
3093 /* Find out the number of additional locate record ccws for cdl. */
3094 if (private->uses_cdl
&& first_rec
< 2*blk_per_trk
) {
3095 if (last_rec
>= 2*blk_per_trk
)
3096 count
= 2*blk_per_trk
- first_rec
;
3098 datasize
+= count
*sizeof(struct LO_eckd_data
);
3100 /* Allocate the ccw request. */
3101 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, cplength
, datasize
,
3106 /* First ccw is define extent or prefix. */
3108 if (prefix(ccw
++, cqr
->data
, first_trk
,
3109 last_trk
, cmd
, basedev
, startdev
) == -EAGAIN
) {
3110 /* Clock not in sync and XRC is enabled.
3113 dasd_sfree_request(cqr
, startdev
);
3114 return ERR_PTR(-EAGAIN
);
3116 idaws
= (unsigned long *) (cqr
->data
+
3117 sizeof(struct PFX_eckd_data
));
3119 if (define_extent(ccw
++, cqr
->data
, first_trk
,
3120 last_trk
, cmd
, basedev
, 0) == -EAGAIN
) {
3121 /* Clock not in sync and XRC is enabled.
3124 dasd_sfree_request(cqr
, startdev
);
3125 return ERR_PTR(-EAGAIN
);
3127 idaws
= (unsigned long *) (cqr
->data
+
3128 sizeof(struct DE_eckd_data
));
3130 /* Build locate_record+read/write/ccws. */
3131 LO_data
= (struct LO_eckd_data
*) (idaws
+ cidaw
);
3133 if (private->uses_cdl
== 0 || recid
> 2*blk_per_trk
) {
3134 /* Only standard blocks so there is just one locate record. */
3135 ccw
[-1].flags
|= CCW_FLAG_CC
;
3136 locate_record(ccw
++, LO_data
++, first_trk
, first_offs
+ 1,
3137 last_rec
- recid
+ 1, cmd
, basedev
, blksize
);
3139 rq_for_each_segment(bv
, req
, iter
) {
3140 dst
= page_address(bv
.bv_page
) + bv
.bv_offset
;
3141 if (dasd_page_cache
) {
3142 char *copy
= kmem_cache_alloc(dasd_page_cache
,
3143 GFP_DMA
| __GFP_NOWARN
);
3144 if (copy
&& rq_data_dir(req
) == WRITE
)
3145 memcpy(copy
+ bv
.bv_offset
, dst
, bv
.bv_len
);
3147 dst
= copy
+ bv
.bv_offset
;
3149 for (off
= 0; off
< bv
.bv_len
; off
+= blksize
) {
3150 sector_t trkid
= recid
;
3151 unsigned int recoffs
= sector_div(trkid
, blk_per_trk
);
3154 /* Locate record for cdl special block ? */
3155 if (private->uses_cdl
&& recid
< 2*blk_per_trk
) {
3156 if (dasd_eckd_cdl_special(blk_per_trk
, recid
)){
3158 count
= dasd_eckd_cdl_reclen(recid
);
3159 if (count
< blksize
&&
3160 rq_data_dir(req
) == READ
)
3161 memset(dst
+ count
, 0xe5,
3164 ccw
[-1].flags
|= CCW_FLAG_CC
;
3165 locate_record(ccw
++, LO_data
++,
3167 1, rcmd
, basedev
, count
);
3169 /* Locate record for standard blocks ? */
3170 if (private->uses_cdl
&& recid
== 2*blk_per_trk
) {
3171 ccw
[-1].flags
|= CCW_FLAG_CC
;
3172 locate_record(ccw
++, LO_data
++,
3174 last_rec
- recid
+ 1,
3175 cmd
, basedev
, count
);
3177 /* Read/write ccw. */
3178 ccw
[-1].flags
|= CCW_FLAG_CC
;
3179 ccw
->cmd_code
= rcmd
;
3181 if (idal_is_needed(dst
, blksize
)) {
3182 ccw
->cda
= (__u32
)(addr_t
) idaws
;
3183 ccw
->flags
= CCW_FLAG_IDA
;
3184 idaws
= idal_create_words(idaws
, dst
, blksize
);
3186 ccw
->cda
= (__u32
)(addr_t
) dst
;
3194 if (blk_noretry_request(req
) ||
3195 block
->base
->features
& DASD_FEATURE_FAILFAST
)
3196 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
3197 cqr
->startdev
= startdev
;
3198 cqr
->memdev
= startdev
;
3200 cqr
->expires
= startdev
->default_expires
* HZ
; /* default 5 minutes */
3201 cqr
->lpm
= dasd_path_get_ppm(startdev
);
3202 cqr
->retries
= startdev
->default_retries
;
3203 cqr
->buildclk
= get_tod_clock();
3204 cqr
->status
= DASD_CQR_FILLED
;
3208 static struct dasd_ccw_req
*dasd_eckd_build_cp_cmd_track(
3209 struct dasd_device
*startdev
,
3210 struct dasd_block
*block
,
3211 struct request
*req
,
3216 unsigned int first_offs
,
3217 unsigned int last_offs
,
3218 unsigned int blk_per_trk
,
3219 unsigned int blksize
)
3221 unsigned long *idaws
;
3222 struct dasd_ccw_req
*cqr
;
3224 struct req_iterator iter
;
3226 char *dst
, *idaw_dst
;
3227 unsigned int cidaw
, cplength
, datasize
;
3231 struct dasd_device
*basedev
;
3232 unsigned int trkcount
, count
, count_to_trk_end
;
3233 unsigned int idaw_len
, seg_len
, part_len
, len_to_track_end
;
3234 unsigned char new_track
, end_idaw
;
3236 unsigned int recoffs
;
3238 basedev
= block
->base
;
3239 if (rq_data_dir(req
) == READ
)
3240 cmd
= DASD_ECKD_CCW_READ_TRACK_DATA
;
3241 else if (rq_data_dir(req
) == WRITE
)
3242 cmd
= DASD_ECKD_CCW_WRITE_TRACK_DATA
;
3244 return ERR_PTR(-EINVAL
);
3246 /* Track based I/O needs IDAWs for each page, and not just for
3247 * 64 bit addresses. We need additional idals for pages
3248 * that get filled from two tracks, so we use the number
3249 * of records as upper limit.
3251 cidaw
= last_rec
- first_rec
+ 1;
3252 trkcount
= last_trk
- first_trk
+ 1;
3254 /* 1x prefix + one read/write ccw per track */
3255 cplength
= 1 + trkcount
;
3257 /* on 31-bit we need space for two 32 bit addresses per page
3258 * on 64-bit one 64 bit address
3260 datasize
= sizeof(struct PFX_eckd_data
) +
3261 cidaw
* sizeof(unsigned long long);
3263 /* Allocate the ccw request. */
3264 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, cplength
, datasize
,
3269 /* transfer length factor: how many bytes to read from the last track */
3270 if (first_trk
== last_trk
)
3271 tlf
= last_offs
- first_offs
+ 1;
3273 tlf
= last_offs
+ 1;
3276 if (prefix_LRE(ccw
++, cqr
->data
, first_trk
,
3277 last_trk
, cmd
, basedev
, startdev
,
3278 1 /* format */, first_offs
+ 1,
3281 /* Clock not in sync and XRC is enabled.
3284 dasd_sfree_request(cqr
, startdev
);
3285 return ERR_PTR(-EAGAIN
);
3289 * The translation of request into ccw programs must meet the
3290 * following conditions:
3291 * - all idaws but the first and the last must address full pages
3292 * (or 2K blocks on 31-bit)
3293 * - the scope of a ccw and it's idal ends with the track boundaries
3295 idaws
= (unsigned long *) (cqr
->data
+ sizeof(struct PFX_eckd_data
));
3299 len_to_track_end
= 0;
3302 rq_for_each_segment(bv
, req
, iter
) {
3303 dst
= page_address(bv
.bv_page
) + bv
.bv_offset
;
3304 seg_len
= bv
.bv_len
;
3308 recoffs
= sector_div(trkid
, blk_per_trk
);
3309 count_to_trk_end
= blk_per_trk
- recoffs
;
3310 count
= min((last_rec
- recid
+ 1),
3311 (sector_t
)count_to_trk_end
);
3312 len_to_track_end
= count
* blksize
;
3313 ccw
[-1].flags
|= CCW_FLAG_CC
;
3314 ccw
->cmd_code
= cmd
;
3315 ccw
->count
= len_to_track_end
;
3316 ccw
->cda
= (__u32
)(addr_t
)idaws
;
3317 ccw
->flags
= CCW_FLAG_IDA
;
3321 /* first idaw for a ccw may start anywhere */
3325 /* If we start a new idaw, we must make sure that it
3326 * starts on an IDA_BLOCK_SIZE boundary.
3327 * If we continue an idaw, we must make sure that the
3328 * current segment begins where the so far accumulated
3332 if (__pa(dst
) & (IDA_BLOCK_SIZE
-1)) {
3333 dasd_sfree_request(cqr
, startdev
);
3334 return ERR_PTR(-ERANGE
);
3338 if ((idaw_dst
+ idaw_len
) != dst
) {
3339 dasd_sfree_request(cqr
, startdev
);
3340 return ERR_PTR(-ERANGE
);
3342 part_len
= min(seg_len
, len_to_track_end
);
3343 seg_len
-= part_len
;
3345 idaw_len
+= part_len
;
3346 len_to_track_end
-= part_len
;
3347 /* collected memory area ends on an IDA_BLOCK border,
3349 * idal_create_words will handle cases where idaw_len
3350 * is larger then IDA_BLOCK_SIZE
3352 if (!(__pa(idaw_dst
+ idaw_len
) & (IDA_BLOCK_SIZE
-1)))
3354 /* We also need to end the idaw at track end */
3355 if (!len_to_track_end
) {
3360 idaws
= idal_create_words(idaws
, idaw_dst
,
3369 if (blk_noretry_request(req
) ||
3370 block
->base
->features
& DASD_FEATURE_FAILFAST
)
3371 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
3372 cqr
->startdev
= startdev
;
3373 cqr
->memdev
= startdev
;
3375 cqr
->expires
= startdev
->default_expires
* HZ
; /* default 5 minutes */
3376 cqr
->lpm
= dasd_path_get_ppm(startdev
);
3377 cqr
->retries
= startdev
->default_retries
;
3378 cqr
->buildclk
= get_tod_clock();
3379 cqr
->status
= DASD_CQR_FILLED
;
3383 static int prepare_itcw(struct itcw
*itcw
,
3384 unsigned int trk
, unsigned int totrk
, int cmd
,
3385 struct dasd_device
*basedev
,
3386 struct dasd_device
*startdev
,
3387 unsigned int rec_on_trk
, int count
,
3388 unsigned int blksize
,
3389 unsigned int total_data_size
,
3391 unsigned int blk_per_trk
)
3393 struct PFX_eckd_data pfxdata
;
3394 struct dasd_eckd_private
*basepriv
, *startpriv
;
3395 struct DE_eckd_data
*dedata
;
3396 struct LRE_eckd_data
*lredata
;
3400 u16 heads
, beghead
, endhead
;
3408 /* setup prefix data */
3409 basepriv
= basedev
->private;
3410 startpriv
= startdev
->private;
3411 dedata
= &pfxdata
.define_extent
;
3412 lredata
= &pfxdata
.locate_record
;
3414 memset(&pfxdata
, 0, sizeof(pfxdata
));
3415 pfxdata
.format
= 1; /* PFX with LRE */
3416 pfxdata
.base_address
= basepriv
->ned
->unit_addr
;
3417 pfxdata
.base_lss
= basepriv
->ned
->ID
;
3418 pfxdata
.validity
.define_extent
= 1;
3420 /* private uid is kept up to date, conf_data may be outdated */
3421 if (startpriv
->uid
.type
!= UA_BASE_DEVICE
) {
3422 pfxdata
.validity
.verify_base
= 1;
3423 if (startpriv
->uid
.type
== UA_HYPER_PAV_ALIAS
)
3424 pfxdata
.validity
.hyper_pav
= 1;
3428 case DASD_ECKD_CCW_READ_TRACK_DATA
:
3429 dedata
->mask
.perm
= 0x1;
3430 dedata
->attributes
.operation
= basepriv
->attrib
.operation
;
3431 dedata
->blk_size
= blksize
;
3432 dedata
->ga_extended
|= 0x42;
3433 lredata
->operation
.orientation
= 0x0;
3434 lredata
->operation
.operation
= 0x0C;
3435 lredata
->auxiliary
.check_bytes
= 0x01;
3436 pfx_cmd
= DASD_ECKD_CCW_PFX_READ
;
3438 case DASD_ECKD_CCW_WRITE_TRACK_DATA
:
3439 dedata
->mask
.perm
= 0x02;
3440 dedata
->attributes
.operation
= basepriv
->attrib
.operation
;
3441 dedata
->blk_size
= blksize
;
3442 rc
= check_XRC(NULL
, dedata
, basedev
);
3443 dedata
->ga_extended
|= 0x42;
3444 lredata
->operation
.orientation
= 0x0;
3445 lredata
->operation
.operation
= 0x3F;
3446 lredata
->extended_operation
= 0x23;
3447 lredata
->auxiliary
.check_bytes
= 0x2;
3449 * If XRC is supported the System Time Stamp is set. The
3450 * validity of the time stamp must be reflected in the prefix
3453 if (dedata
->ga_extended
& 0x08 && dedata
->ga_extended
& 0x02)
3454 pfxdata
.validity
.time_stamp
= 1; /* 'Time Stamp Valid' */
3455 pfx_cmd
= DASD_ECKD_CCW_PFX
;
3457 case DASD_ECKD_CCW_READ_COUNT_MT
:
3458 dedata
->mask
.perm
= 0x1;
3459 dedata
->attributes
.operation
= DASD_BYPASS_CACHE
;
3460 dedata
->ga_extended
|= 0x42;
3461 dedata
->blk_size
= blksize
;
3462 lredata
->operation
.orientation
= 0x2;
3463 lredata
->operation
.operation
= 0x16;
3464 lredata
->auxiliary
.check_bytes
= 0x01;
3465 pfx_cmd
= DASD_ECKD_CCW_PFX_READ
;
3468 DBF_DEV_EVENT(DBF_ERR
, basedev
,
3469 "prepare itcw, unknown opcode 0x%x", cmd
);
3476 dedata
->attributes
.mode
= 0x3; /* ECKD */
3478 heads
= basepriv
->rdc_data
.trk_per_cyl
;
3479 begcyl
= trk
/ heads
;
3480 beghead
= trk
% heads
;
3481 endcyl
= totrk
/ heads
;
3482 endhead
= totrk
% heads
;
3484 /* check for sequential prestage - enhance cylinder range */
3485 if (dedata
->attributes
.operation
== DASD_SEQ_PRESTAGE
||
3486 dedata
->attributes
.operation
== DASD_SEQ_ACCESS
) {
3488 if (endcyl
+ basepriv
->attrib
.nr_cyl
< basepriv
->real_cyl
)
3489 endcyl
+= basepriv
->attrib
.nr_cyl
;
3491 endcyl
= (basepriv
->real_cyl
- 1);
3494 set_ch_t(&dedata
->beg_ext
, begcyl
, beghead
);
3495 set_ch_t(&dedata
->end_ext
, endcyl
, endhead
);
3497 dedata
->ep_format
= 0x20; /* records per track is valid */
3498 dedata
->ep_rec_per_track
= blk_per_trk
;
3501 switch (basepriv
->rdc_data
.dev_type
) {
3503 dn
= ceil_quot(blksize
+ 6, 232);
3504 d
= 9 + ceil_quot(blksize
+ 6 * (dn
+ 1), 34);
3505 sector
= (49 + (rec_on_trk
- 1) * (10 + d
)) / 8;
3508 d
= 7 + ceil_quot(blksize
+ 12, 32);
3509 sector
= (39 + (rec_on_trk
- 1) * (8 + d
)) / 7;
3514 if (cmd
== DASD_ECKD_CCW_READ_COUNT_MT
) {
3515 lredata
->auxiliary
.length_valid
= 0;
3516 lredata
->auxiliary
.length_scope
= 0;
3517 lredata
->sector
= 0xff;
3519 lredata
->auxiliary
.length_valid
= 1;
3520 lredata
->auxiliary
.length_scope
= 1;
3521 lredata
->sector
= sector
;
3523 lredata
->auxiliary
.imbedded_ccw_valid
= 1;
3524 lredata
->length
= tlf
;
3525 lredata
->imbedded_ccw
= cmd
;
3526 lredata
->count
= count
;
3527 set_ch_t(&lredata
->seek_addr
, begcyl
, beghead
);
3528 lredata
->search_arg
.cyl
= lredata
->seek_addr
.cyl
;
3529 lredata
->search_arg
.head
= lredata
->seek_addr
.head
;
3530 lredata
->search_arg
.record
= rec_on_trk
;
3532 dcw
= itcw_add_dcw(itcw
, pfx_cmd
, 0,
3533 &pfxdata
, sizeof(pfxdata
), total_data_size
);
3534 return PTR_RET(dcw
);
3537 static struct dasd_ccw_req
*dasd_eckd_build_cp_tpm_track(
3538 struct dasd_device
*startdev
,
3539 struct dasd_block
*block
,
3540 struct request
*req
,
3545 unsigned int first_offs
,
3546 unsigned int last_offs
,
3547 unsigned int blk_per_trk
,
3548 unsigned int blksize
)
3550 struct dasd_ccw_req
*cqr
;
3551 struct req_iterator iter
;
3554 unsigned int trkcount
, ctidaw
;
3556 struct dasd_device
*basedev
;
3559 struct tidaw
*last_tidaw
= NULL
;
3563 unsigned int seg_len
, part_len
, len_to_track_end
;
3564 unsigned char new_track
;
3565 sector_t recid
, trkid
;
3567 unsigned int count
, count_to_trk_end
;
3570 basedev
= block
->base
;
3571 if (rq_data_dir(req
) == READ
) {
3572 cmd
= DASD_ECKD_CCW_READ_TRACK_DATA
;
3573 itcw_op
= ITCW_OP_READ
;
3574 } else if (rq_data_dir(req
) == WRITE
) {
3575 cmd
= DASD_ECKD_CCW_WRITE_TRACK_DATA
;
3576 itcw_op
= ITCW_OP_WRITE
;
3578 return ERR_PTR(-EINVAL
);
3580 /* trackbased I/O needs address all memory via TIDAWs,
3581 * not just for 64 bit addresses. This allows us to map
3582 * each segment directly to one tidaw.
3583 * In the case of write requests, additional tidaws may
3584 * be needed when a segment crosses a track boundary.
3586 trkcount
= last_trk
- first_trk
+ 1;
3588 rq_for_each_segment(bv
, req
, iter
) {
3591 if (rq_data_dir(req
) == WRITE
)
3592 ctidaw
+= (last_trk
- first_trk
);
3594 /* Allocate the ccw request. */
3595 itcw_size
= itcw_calc_size(0, ctidaw
, 0);
3596 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 0, itcw_size
, startdev
);
3600 /* transfer length factor: how many bytes to read from the last track */
3601 if (first_trk
== last_trk
)
3602 tlf
= last_offs
- first_offs
+ 1;
3604 tlf
= last_offs
+ 1;
3607 itcw
= itcw_init(cqr
->data
, itcw_size
, itcw_op
, 0, ctidaw
, 0);
3612 cqr
->cpaddr
= itcw_get_tcw(itcw
);
3613 if (prepare_itcw(itcw
, first_trk
, last_trk
,
3614 cmd
, basedev
, startdev
,
3617 (last_rec
- first_rec
+ 1) * blksize
,
3618 tlf
, blk_per_trk
) == -EAGAIN
) {
3619 /* Clock not in sync and XRC is enabled.
3625 len_to_track_end
= 0;
3627 * A tidaw can address 4k of memory, but must not cross page boundaries
3628 * We can let the block layer handle this by setting
3629 * blk_queue_segment_boundary to page boundaries and
3630 * blk_max_segment_size to page size when setting up the request queue.
3631 * For write requests, a TIDAW must not cross track boundaries, because
3632 * we have to set the CBC flag on the last tidaw for each track.
3634 if (rq_data_dir(req
) == WRITE
) {
3637 rq_for_each_segment(bv
, req
, iter
) {
3638 dst
= page_address(bv
.bv_page
) + bv
.bv_offset
;
3639 seg_len
= bv
.bv_len
;
3643 offs
= sector_div(trkid
, blk_per_trk
);
3644 count_to_trk_end
= blk_per_trk
- offs
;
3645 count
= min((last_rec
- recid
+ 1),
3646 (sector_t
)count_to_trk_end
);
3647 len_to_track_end
= count
* blksize
;
3651 part_len
= min(seg_len
, len_to_track_end
);
3652 seg_len
-= part_len
;
3653 len_to_track_end
-= part_len
;
3654 /* We need to end the tidaw at track end */
3655 if (!len_to_track_end
) {
3657 tidaw_flags
= TIDAW_FLAGS_INSERT_CBC
;
3660 last_tidaw
= itcw_add_tidaw(itcw
, tidaw_flags
,
3662 if (IS_ERR(last_tidaw
)) {
3670 rq_for_each_segment(bv
, req
, iter
) {
3671 dst
= page_address(bv
.bv_page
) + bv
.bv_offset
;
3672 last_tidaw
= itcw_add_tidaw(itcw
, 0x00,
3674 if (IS_ERR(last_tidaw
)) {
3680 last_tidaw
->flags
|= TIDAW_FLAGS_LAST
;
3681 last_tidaw
->flags
&= ~TIDAW_FLAGS_INSERT_CBC
;
3682 itcw_finalize(itcw
);
3684 if (blk_noretry_request(req
) ||
3685 block
->base
->features
& DASD_FEATURE_FAILFAST
)
3686 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
3688 cqr
->startdev
= startdev
;
3689 cqr
->memdev
= startdev
;
3691 cqr
->expires
= startdev
->default_expires
* HZ
; /* default 5 minutes */
3692 cqr
->lpm
= dasd_path_get_ppm(startdev
);
3693 cqr
->retries
= startdev
->default_retries
;
3694 cqr
->buildclk
= get_tod_clock();
3695 cqr
->status
= DASD_CQR_FILLED
;
3698 dasd_sfree_request(cqr
, startdev
);
3699 return ERR_PTR(ret
);
3702 static struct dasd_ccw_req
*dasd_eckd_build_cp(struct dasd_device
*startdev
,
3703 struct dasd_block
*block
,
3704 struct request
*req
)
3709 struct dasd_eckd_private
*private;
3710 struct dasd_device
*basedev
;
3711 sector_t first_rec
, last_rec
;
3712 sector_t first_trk
, last_trk
;
3713 unsigned int first_offs
, last_offs
;
3714 unsigned int blk_per_trk
, blksize
;
3716 unsigned int data_size
;
3717 struct dasd_ccw_req
*cqr
;
3719 basedev
= block
->base
;
3720 private = basedev
->private;
3722 /* Calculate number of blocks/records per track. */
3723 blksize
= block
->bp_block
;
3724 blk_per_trk
= recs_per_track(&private->rdc_data
, 0, blksize
);
3725 if (blk_per_trk
== 0)
3726 return ERR_PTR(-EINVAL
);
3727 /* Calculate record id of first and last block. */
3728 first_rec
= first_trk
= blk_rq_pos(req
) >> block
->s2b_shift
;
3729 first_offs
= sector_div(first_trk
, blk_per_trk
);
3730 last_rec
= last_trk
=
3731 (blk_rq_pos(req
) + blk_rq_sectors(req
) - 1) >> block
->s2b_shift
;
3732 last_offs
= sector_div(last_trk
, blk_per_trk
);
3733 cdlspecial
= (private->uses_cdl
&& first_rec
< 2*blk_per_trk
);
3735 fcx_multitrack
= private->features
.feature
[40] & 0x20;
3736 data_size
= blk_rq_bytes(req
);
3737 if (data_size
% blksize
)
3738 return ERR_PTR(-EINVAL
);
3739 /* tpm write request add CBC data on each track boundary */
3740 if (rq_data_dir(req
) == WRITE
)
3741 data_size
+= (last_trk
- first_trk
) * 4;
3743 /* is read track data and write track data in command mode supported? */
3744 cmdrtd
= private->features
.feature
[9] & 0x20;
3745 cmdwtd
= private->features
.feature
[12] & 0x40;
3746 use_prefix
= private->features
.feature
[8] & 0x01;
3749 if (cdlspecial
|| dasd_page_cache
) {
3750 /* do nothing, just fall through to the cmd mode single case */
3751 } else if ((data_size
<= private->fcx_max_data
)
3752 && (fcx_multitrack
|| (first_trk
== last_trk
))) {
3753 cqr
= dasd_eckd_build_cp_tpm_track(startdev
, block
, req
,
3754 first_rec
, last_rec
,
3755 first_trk
, last_trk
,
3756 first_offs
, last_offs
,
3757 blk_per_trk
, blksize
);
3758 if (IS_ERR(cqr
) && (PTR_ERR(cqr
) != -EAGAIN
) &&
3759 (PTR_ERR(cqr
) != -ENOMEM
))
3761 } else if (use_prefix
&&
3762 (((rq_data_dir(req
) == READ
) && cmdrtd
) ||
3763 ((rq_data_dir(req
) == WRITE
) && cmdwtd
))) {
3764 cqr
= dasd_eckd_build_cp_cmd_track(startdev
, block
, req
,
3765 first_rec
, last_rec
,
3766 first_trk
, last_trk
,
3767 first_offs
, last_offs
,
3768 blk_per_trk
, blksize
);
3769 if (IS_ERR(cqr
) && (PTR_ERR(cqr
) != -EAGAIN
) &&
3770 (PTR_ERR(cqr
) != -ENOMEM
))
3774 cqr
= dasd_eckd_build_cp_cmd_single(startdev
, block
, req
,
3775 first_rec
, last_rec
,
3776 first_trk
, last_trk
,
3777 first_offs
, last_offs
,
3778 blk_per_trk
, blksize
);
3782 static struct dasd_ccw_req
*dasd_eckd_build_cp_raw(struct dasd_device
*startdev
,
3783 struct dasd_block
*block
,
3784 struct request
*req
)
3786 sector_t start_padding_sectors
, end_sector_offset
, end_padding_sectors
;
3787 unsigned int seg_len
, len_to_track_end
;
3788 unsigned int cidaw
, cplength
, datasize
;
3789 sector_t first_trk
, last_trk
, sectors
;
3790 struct dasd_eckd_private
*base_priv
;
3791 struct dasd_device
*basedev
;
3792 struct req_iterator iter
;
3793 struct dasd_ccw_req
*cqr
;
3794 unsigned int first_offs
;
3795 unsigned int trkcount
;
3796 unsigned long *idaws
;
3806 * raw track access needs to be mutiple of 64k and on 64k boundary
3807 * For read requests we can fix an incorrect alignment by padding
3808 * the request with dummy pages.
3810 start_padding_sectors
= blk_rq_pos(req
) % DASD_RAW_SECTORS_PER_TRACK
;
3811 end_sector_offset
= (blk_rq_pos(req
) + blk_rq_sectors(req
)) %
3812 DASD_RAW_SECTORS_PER_TRACK
;
3813 end_padding_sectors
= (DASD_RAW_SECTORS_PER_TRACK
- end_sector_offset
) %
3814 DASD_RAW_SECTORS_PER_TRACK
;
3815 basedev
= block
->base
;
3816 if ((start_padding_sectors
|| end_padding_sectors
) &&
3817 (rq_data_dir(req
) == WRITE
)) {
3818 DBF_DEV_EVENT(DBF_ERR
, basedev
,
3819 "raw write not track aligned (%lu,%lu) req %p",
3820 start_padding_sectors
, end_padding_sectors
, req
);
3821 return ERR_PTR(-EINVAL
);
3824 first_trk
= blk_rq_pos(req
) / DASD_RAW_SECTORS_PER_TRACK
;
3825 last_trk
= (blk_rq_pos(req
) + blk_rq_sectors(req
) - 1) /
3826 DASD_RAW_SECTORS_PER_TRACK
;
3827 trkcount
= last_trk
- first_trk
+ 1;
3830 if (rq_data_dir(req
) == READ
)
3831 cmd
= DASD_ECKD_CCW_READ_TRACK
;
3832 else if (rq_data_dir(req
) == WRITE
)
3833 cmd
= DASD_ECKD_CCW_WRITE_FULL_TRACK
;
3835 return ERR_PTR(-EINVAL
);
3838 * Raw track based I/O needs IDAWs for each page,
3839 * and not just for 64 bit addresses.
3841 cidaw
= trkcount
* DASD_RAW_BLOCK_PER_TRACK
;
3844 * struct PFX_eckd_data and struct LRE_eckd_data can have up to 2 bytes
3845 * of extended parameter. This is needed for write full track.
3847 base_priv
= basedev
->private;
3848 use_prefix
= base_priv
->features
.feature
[8] & 0x01;
3850 cplength
= 1 + trkcount
;
3851 size
= sizeof(struct PFX_eckd_data
) + 2;
3853 cplength
= 2 + trkcount
;
3854 size
= sizeof(struct DE_eckd_data
) +
3855 sizeof(struct LRE_eckd_data
) + 2;
3857 size
= ALIGN(size
, 8);
3859 datasize
= size
+ cidaw
* sizeof(unsigned long long);
3861 /* Allocate the ccw request. */
3862 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, cplength
,
3863 datasize
, startdev
);
3871 prefix_LRE(ccw
++, data
, first_trk
, last_trk
, cmd
, basedev
,
3872 startdev
, 1, first_offs
+ 1, trkcount
, 0, 0);
3874 define_extent(ccw
++, data
, first_trk
, last_trk
, cmd
, basedev
, 0);
3875 ccw
[-1].flags
|= CCW_FLAG_CC
;
3877 data
+= sizeof(struct DE_eckd_data
);
3878 locate_record_ext(ccw
++, data
, first_trk
, first_offs
+ 1,
3879 trkcount
, cmd
, basedev
, 0, 0);
3882 idaws
= (unsigned long *)(cqr
->data
+ size
);
3883 len_to_track_end
= 0;
3884 if (start_padding_sectors
) {
3885 ccw
[-1].flags
|= CCW_FLAG_CC
;
3886 ccw
->cmd_code
= cmd
;
3887 /* maximum 3390 track size */
3889 /* 64k map to one track */
3890 len_to_track_end
= 65536 - start_padding_sectors
* 512;
3891 ccw
->cda
= (__u32
)(addr_t
)idaws
;
3892 ccw
->flags
|= CCW_FLAG_IDA
;
3893 ccw
->flags
|= CCW_FLAG_SLI
;
3895 for (sectors
= 0; sectors
< start_padding_sectors
; sectors
+= 8)
3896 idaws
= idal_create_words(idaws
, rawpadpage
, PAGE_SIZE
);
3898 rq_for_each_segment(bv
, req
, iter
) {
3899 dst
= page_address(bv
.bv_page
) + bv
.bv_offset
;
3900 seg_len
= bv
.bv_len
;
3901 if (cmd
== DASD_ECKD_CCW_READ_TRACK
)
3902 memset(dst
, 0, seg_len
);
3903 if (!len_to_track_end
) {
3904 ccw
[-1].flags
|= CCW_FLAG_CC
;
3905 ccw
->cmd_code
= cmd
;
3906 /* maximum 3390 track size */
3908 /* 64k map to one track */
3909 len_to_track_end
= 65536;
3910 ccw
->cda
= (__u32
)(addr_t
)idaws
;
3911 ccw
->flags
|= CCW_FLAG_IDA
;
3912 ccw
->flags
|= CCW_FLAG_SLI
;
3915 len_to_track_end
-= seg_len
;
3916 idaws
= idal_create_words(idaws
, dst
, seg_len
);
3918 for (sectors
= 0; sectors
< end_padding_sectors
; sectors
+= 8)
3919 idaws
= idal_create_words(idaws
, rawpadpage
, PAGE_SIZE
);
3920 if (blk_noretry_request(req
) ||
3921 block
->base
->features
& DASD_FEATURE_FAILFAST
)
3922 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
3923 cqr
->startdev
= startdev
;
3924 cqr
->memdev
= startdev
;
3926 cqr
->expires
= startdev
->default_expires
* HZ
;
3927 cqr
->lpm
= dasd_path_get_ppm(startdev
);
3928 cqr
->retries
= startdev
->default_retries
;
3929 cqr
->buildclk
= get_tod_clock();
3930 cqr
->status
= DASD_CQR_FILLED
;
3937 dasd_eckd_free_cp(struct dasd_ccw_req
*cqr
, struct request
*req
)
3939 struct dasd_eckd_private
*private;
3941 struct req_iterator iter
;
3944 unsigned int blksize
, blk_per_trk
, off
;
3948 if (!dasd_page_cache
)
3950 private = cqr
->block
->base
->private;
3951 blksize
= cqr
->block
->bp_block
;
3952 blk_per_trk
= recs_per_track(&private->rdc_data
, 0, blksize
);
3953 recid
= blk_rq_pos(req
) >> cqr
->block
->s2b_shift
;
3955 /* Skip over define extent & locate record. */
3957 if (private->uses_cdl
== 0 || recid
> 2*blk_per_trk
)
3959 rq_for_each_segment(bv
, req
, iter
) {
3960 dst
= page_address(bv
.bv_page
) + bv
.bv_offset
;
3961 for (off
= 0; off
< bv
.bv_len
; off
+= blksize
) {
3962 /* Skip locate record. */
3963 if (private->uses_cdl
&& recid
<= 2*blk_per_trk
)
3966 if (ccw
->flags
& CCW_FLAG_IDA
)
3967 cda
= *((char **)((addr_t
) ccw
->cda
));
3969 cda
= (char *)((addr_t
) ccw
->cda
);
3971 if (rq_data_dir(req
) == READ
)
3972 memcpy(dst
, cda
, bv
.bv_len
);
3973 kmem_cache_free(dasd_page_cache
,
3974 (void *)((addr_t
)cda
& PAGE_MASK
));
3983 status
= cqr
->status
== DASD_CQR_DONE
;
3984 dasd_sfree_request(cqr
, cqr
->memdev
);
3989 * Modify ccw/tcw in cqr so it can be started on a base device.
3991 * Note that this is not enough to restart the cqr!
3992 * Either reset cqr->startdev as well (summary unit check handling)
3993 * or restart via separate cqr (as in ERP handling).
3995 void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req
*cqr
)
3998 struct PFX_eckd_data
*pfxdata
;
4003 if (cqr
->cpmode
== 1) {
4005 tccb
= tcw_get_tccb(tcw
);
4006 dcw
= (struct dcw
*)&tccb
->tca
[0];
4007 pfxdata
= (struct PFX_eckd_data
*)&dcw
->cd
[0];
4008 pfxdata
->validity
.verify_base
= 0;
4009 pfxdata
->validity
.hyper_pav
= 0;
4012 pfxdata
= cqr
->data
;
4013 if (ccw
->cmd_code
== DASD_ECKD_CCW_PFX
) {
4014 pfxdata
->validity
.verify_base
= 0;
4015 pfxdata
->validity
.hyper_pav
= 0;
4020 #define DASD_ECKD_CHANQ_MAX_SIZE 4
4022 static struct dasd_ccw_req
*dasd_eckd_build_alias_cp(struct dasd_device
*base
,
4023 struct dasd_block
*block
,
4024 struct request
*req
)
4026 struct dasd_eckd_private
*private;
4027 struct dasd_device
*startdev
;
4028 unsigned long flags
;
4029 struct dasd_ccw_req
*cqr
;
4031 startdev
= dasd_alias_get_start_dev(base
);
4034 private = startdev
->private;
4035 if (private->count
>= DASD_ECKD_CHANQ_MAX_SIZE
)
4036 return ERR_PTR(-EBUSY
);
4038 spin_lock_irqsave(get_ccwdev_lock(startdev
->cdev
), flags
);
4040 if ((base
->features
& DASD_FEATURE_USERAW
))
4041 cqr
= dasd_eckd_build_cp_raw(startdev
, block
, req
);
4043 cqr
= dasd_eckd_build_cp(startdev
, block
, req
);
4046 spin_unlock_irqrestore(get_ccwdev_lock(startdev
->cdev
), flags
);
4050 static int dasd_eckd_free_alias_cp(struct dasd_ccw_req
*cqr
,
4051 struct request
*req
)
4053 struct dasd_eckd_private
*private;
4054 unsigned long flags
;
4056 spin_lock_irqsave(get_ccwdev_lock(cqr
->memdev
->cdev
), flags
);
4057 private = cqr
->memdev
->private;
4059 spin_unlock_irqrestore(get_ccwdev_lock(cqr
->memdev
->cdev
), flags
);
4060 return dasd_eckd_free_cp(cqr
, req
);
4064 dasd_eckd_fill_info(struct dasd_device
* device
,
4065 struct dasd_information2_t
* info
)
4067 struct dasd_eckd_private
*private = device
->private;
4069 info
->label_block
= 2;
4070 info
->FBA_layout
= private->uses_cdl
? 0 : 1;
4071 info
->format
= private->uses_cdl
? DASD_FORMAT_CDL
: DASD_FORMAT_LDL
;
4072 info
->characteristics_size
= sizeof(private->rdc_data
);
4073 memcpy(info
->characteristics
, &private->rdc_data
,
4074 sizeof(private->rdc_data
));
4075 info
->confdata_size
= min((unsigned long)private->conf_len
,
4076 sizeof(info
->configuration_data
));
4077 memcpy(info
->configuration_data
, private->conf_data
,
4078 info
->confdata_size
);
4083 * SECTION: ioctl functions for eckd devices.
4087 * Release device ioctl.
4088 * Buils a channel programm to releases a prior reserved
4089 * (see dasd_eckd_reserve) device.
4092 dasd_eckd_release(struct dasd_device
*device
)
4094 struct dasd_ccw_req
*cqr
;
4099 if (!capable(CAP_SYS_ADMIN
))
4103 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1, 32, device
);
4105 mutex_lock(&dasd_reserve_mutex
);
4107 cqr
= &dasd_reserve_req
->cqr
;
4108 memset(cqr
, 0, sizeof(*cqr
));
4109 memset(&dasd_reserve_req
->ccw
, 0,
4110 sizeof(dasd_reserve_req
->ccw
));
4111 cqr
->cpaddr
= &dasd_reserve_req
->ccw
;
4112 cqr
->data
= &dasd_reserve_req
->data
;
4113 cqr
->magic
= DASD_ECKD_MAGIC
;
4116 ccw
->cmd_code
= DASD_ECKD_CCW_RELEASE
;
4117 ccw
->flags
|= CCW_FLAG_SLI
;
4119 ccw
->cda
= (__u32
)(addr_t
) cqr
->data
;
4120 cqr
->startdev
= device
;
4121 cqr
->memdev
= device
;
4122 clear_bit(DASD_CQR_FLAGS_USE_ERP
, &cqr
->flags
);
4123 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
4124 cqr
->retries
= 2; /* set retry counter to enable basic ERP */
4125 cqr
->expires
= 2 * HZ
;
4126 cqr
->buildclk
= get_tod_clock();
4127 cqr
->status
= DASD_CQR_FILLED
;
4129 rc
= dasd_sleep_on_immediatly(cqr
);
4131 clear_bit(DASD_FLAG_IS_RESERVED
, &device
->flags
);
4134 mutex_unlock(&dasd_reserve_mutex
);
4136 dasd_sfree_request(cqr
, cqr
->memdev
);
4141 * Reserve device ioctl.
4142 * Options are set to 'synchronous wait for interrupt' and
4143 * 'timeout the request'. This leads to a terminate IO if
4144 * the interrupt is outstanding for a certain time.
4147 dasd_eckd_reserve(struct dasd_device
*device
)
4149 struct dasd_ccw_req
*cqr
;
4154 if (!capable(CAP_SYS_ADMIN
))
4158 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1, 32, device
);
4160 mutex_lock(&dasd_reserve_mutex
);
4162 cqr
= &dasd_reserve_req
->cqr
;
4163 memset(cqr
, 0, sizeof(*cqr
));
4164 memset(&dasd_reserve_req
->ccw
, 0,
4165 sizeof(dasd_reserve_req
->ccw
));
4166 cqr
->cpaddr
= &dasd_reserve_req
->ccw
;
4167 cqr
->data
= &dasd_reserve_req
->data
;
4168 cqr
->magic
= DASD_ECKD_MAGIC
;
4171 ccw
->cmd_code
= DASD_ECKD_CCW_RESERVE
;
4172 ccw
->flags
|= CCW_FLAG_SLI
;
4174 ccw
->cda
= (__u32
)(addr_t
) cqr
->data
;
4175 cqr
->startdev
= device
;
4176 cqr
->memdev
= device
;
4177 clear_bit(DASD_CQR_FLAGS_USE_ERP
, &cqr
->flags
);
4178 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
4179 cqr
->retries
= 2; /* set retry counter to enable basic ERP */
4180 cqr
->expires
= 2 * HZ
;
4181 cqr
->buildclk
= get_tod_clock();
4182 cqr
->status
= DASD_CQR_FILLED
;
4184 rc
= dasd_sleep_on_immediatly(cqr
);
4186 set_bit(DASD_FLAG_IS_RESERVED
, &device
->flags
);
4189 mutex_unlock(&dasd_reserve_mutex
);
4191 dasd_sfree_request(cqr
, cqr
->memdev
);
4196 * Steal lock ioctl - unconditional reserve device.
4197 * Buils a channel programm to break a device's reservation.
4198 * (unconditional reserve)
4201 dasd_eckd_steal_lock(struct dasd_device
*device
)
4203 struct dasd_ccw_req
*cqr
;
4208 if (!capable(CAP_SYS_ADMIN
))
4212 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1, 32, device
);
4214 mutex_lock(&dasd_reserve_mutex
);
4216 cqr
= &dasd_reserve_req
->cqr
;
4217 memset(cqr
, 0, sizeof(*cqr
));
4218 memset(&dasd_reserve_req
->ccw
, 0,
4219 sizeof(dasd_reserve_req
->ccw
));
4220 cqr
->cpaddr
= &dasd_reserve_req
->ccw
;
4221 cqr
->data
= &dasd_reserve_req
->data
;
4222 cqr
->magic
= DASD_ECKD_MAGIC
;
4225 ccw
->cmd_code
= DASD_ECKD_CCW_SLCK
;
4226 ccw
->flags
|= CCW_FLAG_SLI
;
4228 ccw
->cda
= (__u32
)(addr_t
) cqr
->data
;
4229 cqr
->startdev
= device
;
4230 cqr
->memdev
= device
;
4231 clear_bit(DASD_CQR_FLAGS_USE_ERP
, &cqr
->flags
);
4232 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
4233 cqr
->retries
= 2; /* set retry counter to enable basic ERP */
4234 cqr
->expires
= 2 * HZ
;
4235 cqr
->buildclk
= get_tod_clock();
4236 cqr
->status
= DASD_CQR_FILLED
;
4238 rc
= dasd_sleep_on_immediatly(cqr
);
4240 set_bit(DASD_FLAG_IS_RESERVED
, &device
->flags
);
4243 mutex_unlock(&dasd_reserve_mutex
);
4245 dasd_sfree_request(cqr
, cqr
->memdev
);
4250 * SNID - Sense Path Group ID
4251 * This ioctl may be used in situations where I/O is stalled due to
4252 * a reserve, so if the normal dasd_smalloc_request fails, we use the
4253 * preallocated dasd_reserve_req.
4255 static int dasd_eckd_snid(struct dasd_device
*device
,
4258 struct dasd_ccw_req
*cqr
;
4262 struct dasd_snid_ioctl_data usrparm
;
4264 if (!capable(CAP_SYS_ADMIN
))
4267 if (copy_from_user(&usrparm
, argp
, sizeof(usrparm
)))
4271 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1,
4272 sizeof(struct dasd_snid_data
), device
);
4274 mutex_lock(&dasd_reserve_mutex
);
4276 cqr
= &dasd_reserve_req
->cqr
;
4277 memset(cqr
, 0, sizeof(*cqr
));
4278 memset(&dasd_reserve_req
->ccw
, 0,
4279 sizeof(dasd_reserve_req
->ccw
));
4280 cqr
->cpaddr
= &dasd_reserve_req
->ccw
;
4281 cqr
->data
= &dasd_reserve_req
->data
;
4282 cqr
->magic
= DASD_ECKD_MAGIC
;
4285 ccw
->cmd_code
= DASD_ECKD_CCW_SNID
;
4286 ccw
->flags
|= CCW_FLAG_SLI
;
4288 ccw
->cda
= (__u32
)(addr_t
) cqr
->data
;
4289 cqr
->startdev
= device
;
4290 cqr
->memdev
= device
;
4291 clear_bit(DASD_CQR_FLAGS_USE_ERP
, &cqr
->flags
);
4292 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
4293 set_bit(DASD_CQR_ALLOW_SLOCK
, &cqr
->flags
);
4295 cqr
->expires
= 10 * HZ
;
4296 cqr
->buildclk
= get_tod_clock();
4297 cqr
->status
= DASD_CQR_FILLED
;
4298 cqr
->lpm
= usrparm
.path_mask
;
4300 rc
= dasd_sleep_on_immediatly(cqr
);
4301 /* verify that I/O processing didn't modify the path mask */
4302 if (!rc
&& usrparm
.path_mask
&& (cqr
->lpm
!= usrparm
.path_mask
))
4305 usrparm
.data
= *((struct dasd_snid_data
*)cqr
->data
);
4306 if (copy_to_user(argp
, &usrparm
, sizeof(usrparm
)))
4311 mutex_unlock(&dasd_reserve_mutex
);
4313 dasd_sfree_request(cqr
, cqr
->memdev
);
4318 * Read performance statistics
4321 dasd_eckd_performance(struct dasd_device
*device
, void __user
*argp
)
4323 struct dasd_psf_prssd_data
*prssdp
;
4324 struct dasd_rssd_perf_stats_t
*stats
;
4325 struct dasd_ccw_req
*cqr
;
4329 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1 /* PSF */ + 1 /* RSSD */,
4330 (sizeof(struct dasd_psf_prssd_data
) +
4331 sizeof(struct dasd_rssd_perf_stats_t
)),
4334 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
4335 "Could not allocate initialization request");
4336 return PTR_ERR(cqr
);
4338 cqr
->startdev
= device
;
4339 cqr
->memdev
= device
;
4341 clear_bit(DASD_CQR_FLAGS_USE_ERP
, &cqr
->flags
);
4342 cqr
->expires
= 10 * HZ
;
4344 /* Prepare for Read Subsystem Data */
4345 prssdp
= (struct dasd_psf_prssd_data
*) cqr
->data
;
4346 memset(prssdp
, 0, sizeof(struct dasd_psf_prssd_data
));
4347 prssdp
->order
= PSF_ORDER_PRSSD
;
4348 prssdp
->suborder
= 0x01; /* Performance Statistics */
4349 prssdp
->varies
[1] = 0x01; /* Perf Statistics for the Subsystem */
4352 ccw
->cmd_code
= DASD_ECKD_CCW_PSF
;
4353 ccw
->count
= sizeof(struct dasd_psf_prssd_data
);
4354 ccw
->flags
|= CCW_FLAG_CC
;
4355 ccw
->cda
= (__u32
)(addr_t
) prssdp
;
4357 /* Read Subsystem Data - Performance Statistics */
4358 stats
= (struct dasd_rssd_perf_stats_t
*) (prssdp
+ 1);
4359 memset(stats
, 0, sizeof(struct dasd_rssd_perf_stats_t
));
4362 ccw
->cmd_code
= DASD_ECKD_CCW_RSSD
;
4363 ccw
->count
= sizeof(struct dasd_rssd_perf_stats_t
);
4364 ccw
->cda
= (__u32
)(addr_t
) stats
;
4366 cqr
->buildclk
= get_tod_clock();
4367 cqr
->status
= DASD_CQR_FILLED
;
4368 rc
= dasd_sleep_on(cqr
);
4370 prssdp
= (struct dasd_psf_prssd_data
*) cqr
->data
;
4371 stats
= (struct dasd_rssd_perf_stats_t
*) (prssdp
+ 1);
4372 if (copy_to_user(argp
, stats
,
4373 sizeof(struct dasd_rssd_perf_stats_t
)))
4376 dasd_sfree_request(cqr
, cqr
->memdev
);
4381 * Get attributes (cache operations)
4382 * Returnes the cache attributes used in Define Extend (DE).
4385 dasd_eckd_get_attrib(struct dasd_device
*device
, void __user
*argp
)
4387 struct dasd_eckd_private
*private = device
->private;
4388 struct attrib_data_t attrib
= private->attrib
;
4391 if (!capable(CAP_SYS_ADMIN
))
4397 if (copy_to_user(argp
, (long *) &attrib
,
4398 sizeof(struct attrib_data_t
)))
4405 * Set attributes (cache operations)
4406 * Stores the attributes for cache operation to be used in Define Extend (DE).
4409 dasd_eckd_set_attrib(struct dasd_device
*device
, void __user
*argp
)
4411 struct dasd_eckd_private
*private = device
->private;
4412 struct attrib_data_t attrib
;
4414 if (!capable(CAP_SYS_ADMIN
))
4419 if (copy_from_user(&attrib
, argp
, sizeof(struct attrib_data_t
)))
4421 private->attrib
= attrib
;
4423 dev_info(&device
->cdev
->dev
,
4424 "The DASD cache mode was set to %x (%i cylinder prestage)\n",
4425 private->attrib
.operation
, private->attrib
.nr_cyl
);
4430 * Issue syscall I/O to EMC Symmetrix array.
4431 * CCWs are PSF and RSSD
4433 static int dasd_symm_io(struct dasd_device
*device
, void __user
*argp
)
4435 struct dasd_symmio_parms usrparm
;
4436 char *psf_data
, *rssd_result
;
4437 struct dasd_ccw_req
*cqr
;
4442 if (!capable(CAP_SYS_ADMIN
) && !capable(CAP_SYS_RAWIO
))
4446 /* Copy parms from caller */
4448 if (copy_from_user(&usrparm
, argp
, sizeof(usrparm
)))
4450 if (is_compat_task()) {
4451 /* Make sure pointers are sane even on 31 bit. */
4453 if ((usrparm
.psf_data
>> 32) != 0)
4455 if ((usrparm
.rssd_result
>> 32) != 0)
4457 usrparm
.psf_data
&= 0x7fffffffULL
;
4458 usrparm
.rssd_result
&= 0x7fffffffULL
;
4460 /* alloc I/O data area */
4461 psf_data
= kzalloc(usrparm
.psf_data_len
, GFP_KERNEL
| GFP_DMA
);
4462 rssd_result
= kzalloc(usrparm
.rssd_result_len
, GFP_KERNEL
| GFP_DMA
);
4463 if (!psf_data
|| !rssd_result
) {
4468 /* get syscall header from user space */
4470 if (copy_from_user(psf_data
,
4471 (void __user
*)(unsigned long) usrparm
.psf_data
,
4472 usrparm
.psf_data_len
))
4477 /* setup CCWs for PSF + RSSD */
4478 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 2 , 0, device
);
4480 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
4481 "Could not allocate initialization request");
4486 cqr
->startdev
= device
;
4487 cqr
->memdev
= device
;
4489 cqr
->expires
= 10 * HZ
;
4490 cqr
->buildclk
= get_tod_clock();
4491 cqr
->status
= DASD_CQR_FILLED
;
4493 /* Build the ccws */
4497 ccw
->cmd_code
= DASD_ECKD_CCW_PSF
;
4498 ccw
->count
= usrparm
.psf_data_len
;
4499 ccw
->flags
|= CCW_FLAG_CC
;
4500 ccw
->cda
= (__u32
)(addr_t
) psf_data
;
4505 ccw
->cmd_code
= DASD_ECKD_CCW_RSSD
;
4506 ccw
->count
= usrparm
.rssd_result_len
;
4507 ccw
->flags
= CCW_FLAG_SLI
;
4508 ccw
->cda
= (__u32
)(addr_t
) rssd_result
;
4510 rc
= dasd_sleep_on(cqr
);
4515 if (copy_to_user((void __user
*)(unsigned long) usrparm
.rssd_result
,
4516 rssd_result
, usrparm
.rssd_result_len
))
4521 dasd_sfree_request(cqr
, cqr
->memdev
);
4526 DBF_DEV_EVENT(DBF_WARNING
, device
,
4527 "Symmetrix ioctl (0x%02x 0x%02x): rc=%d",
4528 (int) psf0
, (int) psf1
, rc
);
4533 dasd_eckd_ioctl(struct dasd_block
*block
, unsigned int cmd
, void __user
*argp
)
4535 struct dasd_device
*device
= block
->base
;
4539 return dasd_eckd_get_attrib(device
, argp
);
4541 return dasd_eckd_set_attrib(device
, argp
);
4543 return dasd_eckd_performance(device
, argp
);
4545 return dasd_eckd_release(device
);
4547 return dasd_eckd_reserve(device
);
4549 return dasd_eckd_steal_lock(device
);
4551 return dasd_eckd_snid(device
, argp
);
4553 return dasd_symm_io(device
, argp
);
4560 * Dump the range of CCWs into 'page' buffer
4561 * and return number of printed chars.
4564 dasd_eckd_dump_ccw_range(struct ccw1
*from
, struct ccw1
*to
, char *page
)
4570 while (from
<= to
) {
4571 len
+= sprintf(page
+ len
, PRINTK_HEADER
4572 " CCW %p: %08X %08X DAT:",
4573 from
, ((int *) from
)[0], ((int *) from
)[1]);
4575 /* get pointer to data (consider IDALs) */
4576 if (from
->flags
& CCW_FLAG_IDA
)
4577 datap
= (char *) *((addr_t
*) (addr_t
) from
->cda
);
4579 datap
= (char *) ((addr_t
) from
->cda
);
4581 /* dump data (max 32 bytes) */
4582 for (count
= 0; count
< from
->count
&& count
< 32; count
++) {
4583 if (count
% 8 == 0) len
+= sprintf(page
+ len
, " ");
4584 if (count
% 4 == 0) len
+= sprintf(page
+ len
, " ");
4585 len
+= sprintf(page
+ len
, "%02x", datap
[count
]);
4587 len
+= sprintf(page
+ len
, "\n");
4594 dasd_eckd_dump_sense_dbf(struct dasd_device
*device
, struct irb
*irb
,
4600 sense
= (u64
*) dasd_get_sense(irb
);
4601 stat
= (u64
*) &irb
->scsw
;
4603 DBF_DEV_EVENT(DBF_EMERG
, device
, "%s: %016llx %08x : "
4604 "%016llx %016llx %016llx %016llx",
4605 reason
, *stat
, *((u32
*) (stat
+ 1)),
4606 sense
[0], sense
[1], sense
[2], sense
[3]);
4608 DBF_DEV_EVENT(DBF_EMERG
, device
, "%s: %016llx %08x : %s",
4609 reason
, *stat
, *((u32
*) (stat
+ 1)),
4615 * Print sense data and related channel program.
4616 * Parts are printed because printk buffer is only 1024 bytes.
4618 static void dasd_eckd_dump_sense_ccw(struct dasd_device
*device
,
4619 struct dasd_ccw_req
*req
, struct irb
*irb
)
4622 struct ccw1
*first
, *last
, *fail
, *from
, *to
;
4625 page
= (char *) get_zeroed_page(GFP_ATOMIC
);
4627 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
4628 "No memory to dump sense data\n");
4631 /* dump the sense data */
4632 len
= sprintf(page
, PRINTK_HEADER
4633 " I/O status report for device %s:\n",
4634 dev_name(&device
->cdev
->dev
));
4635 len
+= sprintf(page
+ len
, PRINTK_HEADER
4636 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X "
4638 req
, scsw_cc(&irb
->scsw
), scsw_fctl(&irb
->scsw
),
4639 scsw_actl(&irb
->scsw
), scsw_stctl(&irb
->scsw
),
4640 scsw_dstat(&irb
->scsw
), scsw_cstat(&irb
->scsw
),
4641 req
? req
->intrc
: 0);
4642 len
+= sprintf(page
+ len
, PRINTK_HEADER
4643 " device %s: Failing CCW: %p\n",
4644 dev_name(&device
->cdev
->dev
),
4645 (void *) (addr_t
) irb
->scsw
.cmd
.cpa
);
4646 if (irb
->esw
.esw0
.erw
.cons
) {
4647 for (sl
= 0; sl
< 4; sl
++) {
4648 len
+= sprintf(page
+ len
, PRINTK_HEADER
4649 " Sense(hex) %2d-%2d:",
4650 (8 * sl
), ((8 * sl
) + 7));
4652 for (sct
= 0; sct
< 8; sct
++) {
4653 len
+= sprintf(page
+ len
, " %02x",
4654 irb
->ecw
[8 * sl
+ sct
]);
4656 len
+= sprintf(page
+ len
, "\n");
4659 if (irb
->ecw
[27] & DASD_SENSE_BIT_0
) {
4660 /* 24 Byte Sense Data */
4661 sprintf(page
+ len
, PRINTK_HEADER
4662 " 24 Byte: %x MSG %x, "
4663 "%s MSGb to SYSOP\n",
4664 irb
->ecw
[7] >> 4, irb
->ecw
[7] & 0x0f,
4665 irb
->ecw
[1] & 0x10 ? "" : "no");
4667 /* 32 Byte Sense Data */
4668 sprintf(page
+ len
, PRINTK_HEADER
4669 " 32 Byte: Format: %x "
4670 "Exception class %x\n",
4671 irb
->ecw
[6] & 0x0f, irb
->ecw
[22] >> 4);
4674 sprintf(page
+ len
, PRINTK_HEADER
4675 " SORRY - NO VALID SENSE AVAILABLE\n");
4677 printk(KERN_ERR
"%s", page
);
4680 /* req == NULL for unsolicited interrupts */
4681 /* dump the Channel Program (max 140 Bytes per line) */
4682 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */
4683 first
= req
->cpaddr
;
4684 for (last
= first
; last
->flags
& (CCW_FLAG_CC
| CCW_FLAG_DC
); last
++);
4685 to
= min(first
+ 6, last
);
4686 len
= sprintf(page
, PRINTK_HEADER
4687 " Related CP in req: %p\n", req
);
4688 dasd_eckd_dump_ccw_range(first
, to
, page
+ len
);
4689 printk(KERN_ERR
"%s", page
);
4691 /* print failing CCW area (maximum 4) */
4692 /* scsw->cda is either valid or zero */
4695 fail
= (struct ccw1
*)(addr_t
)
4696 irb
->scsw
.cmd
.cpa
; /* failing CCW */
4697 if (from
< fail
- 2) {
4698 from
= fail
- 2; /* there is a gap - print header */
4699 len
+= sprintf(page
, PRINTK_HEADER
"......\n");
4701 to
= min(fail
+ 1, last
);
4702 len
+= dasd_eckd_dump_ccw_range(from
, to
, page
+ len
);
4704 /* print last CCWs (maximum 2) */
4705 from
= max(from
, ++to
);
4706 if (from
< last
- 1) {
4707 from
= last
- 1; /* there is a gap - print header */
4708 len
+= sprintf(page
+ len
, PRINTK_HEADER
"......\n");
4710 len
+= dasd_eckd_dump_ccw_range(from
, last
, page
+ len
);
4712 printk(KERN_ERR
"%s", page
);
4714 free_page((unsigned long) page
);
4719 * Print sense data from a tcw.
4721 static void dasd_eckd_dump_sense_tcw(struct dasd_device
*device
,
4722 struct dasd_ccw_req
*req
, struct irb
*irb
)
4725 int len
, sl
, sct
, residual
;
4729 page
= (char *) get_zeroed_page(GFP_ATOMIC
);
4731 DBF_DEV_EVENT(DBF_WARNING
, device
, " %s",
4732 "No memory to dump sense data");
4735 /* dump the sense data */
4736 len
= sprintf(page
, PRINTK_HEADER
4737 " I/O status report for device %s:\n",
4738 dev_name(&device
->cdev
->dev
));
4739 len
+= sprintf(page
+ len
, PRINTK_HEADER
4740 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X "
4741 "CS:%02X fcxs:%02X schxs:%02X RC:%d\n",
4742 req
, scsw_cc(&irb
->scsw
), scsw_fctl(&irb
->scsw
),
4743 scsw_actl(&irb
->scsw
), scsw_stctl(&irb
->scsw
),
4744 scsw_dstat(&irb
->scsw
), scsw_cstat(&irb
->scsw
),
4746 (irb
->scsw
.tm
.ifob
<< 7) | irb
->scsw
.tm
.sesq
,
4747 req
? req
->intrc
: 0);
4748 len
+= sprintf(page
+ len
, PRINTK_HEADER
4749 " device %s: Failing TCW: %p\n",
4750 dev_name(&device
->cdev
->dev
),
4751 (void *) (addr_t
) irb
->scsw
.tm
.tcw
);
4755 if (irb
->scsw
.tm
.tcw
&& (irb
->scsw
.tm
.fcxs
& 0x01))
4757 (struct tcw
*)(unsigned long)irb
->scsw
.tm
.tcw
);
4760 len
+= sprintf(page
+ len
, PRINTK_HEADER
4761 " tsb->length %d\n", tsb
->length
);
4762 len
+= sprintf(page
+ len
, PRINTK_HEADER
4763 " tsb->flags %x\n", tsb
->flags
);
4764 len
+= sprintf(page
+ len
, PRINTK_HEADER
4765 " tsb->dcw_offset %d\n", tsb
->dcw_offset
);
4766 len
+= sprintf(page
+ len
, PRINTK_HEADER
4767 " tsb->count %d\n", tsb
->count
);
4768 residual
= tsb
->count
- 28;
4769 len
+= sprintf(page
+ len
, PRINTK_HEADER
4770 " residual %d\n", residual
);
4772 switch (tsb
->flags
& 0x07) {
4773 case 1: /* tsa_iostat */
4774 len
+= sprintf(page
+ len
, PRINTK_HEADER
4775 " tsb->tsa.iostat.dev_time %d\n",
4776 tsb
->tsa
.iostat
.dev_time
);
4777 len
+= sprintf(page
+ len
, PRINTK_HEADER
4778 " tsb->tsa.iostat.def_time %d\n",
4779 tsb
->tsa
.iostat
.def_time
);
4780 len
+= sprintf(page
+ len
, PRINTK_HEADER
4781 " tsb->tsa.iostat.queue_time %d\n",
4782 tsb
->tsa
.iostat
.queue_time
);
4783 len
+= sprintf(page
+ len
, PRINTK_HEADER
4784 " tsb->tsa.iostat.dev_busy_time %d\n",
4785 tsb
->tsa
.iostat
.dev_busy_time
);
4786 len
+= sprintf(page
+ len
, PRINTK_HEADER
4787 " tsb->tsa.iostat.dev_act_time %d\n",
4788 tsb
->tsa
.iostat
.dev_act_time
);
4789 sense
= tsb
->tsa
.iostat
.sense
;
4791 case 2: /* ts_ddpc */
4792 len
+= sprintf(page
+ len
, PRINTK_HEADER
4793 " tsb->tsa.ddpc.rc %d\n", tsb
->tsa
.ddpc
.rc
);
4794 for (sl
= 0; sl
< 2; sl
++) {
4795 len
+= sprintf(page
+ len
, PRINTK_HEADER
4796 " tsb->tsa.ddpc.rcq %2d-%2d: ",
4797 (8 * sl
), ((8 * sl
) + 7));
4798 rcq
= tsb
->tsa
.ddpc
.rcq
;
4799 for (sct
= 0; sct
< 8; sct
++) {
4800 len
+= sprintf(page
+ len
, " %02x",
4803 len
+= sprintf(page
+ len
, "\n");
4805 sense
= tsb
->tsa
.ddpc
.sense
;
4807 case 3: /* tsa_intrg */
4808 len
+= sprintf(page
+ len
, PRINTK_HEADER
4809 " tsb->tsa.intrg.: not supported yet\n");
4814 for (sl
= 0; sl
< 4; sl
++) {
4815 len
+= sprintf(page
+ len
, PRINTK_HEADER
4816 " Sense(hex) %2d-%2d:",
4817 (8 * sl
), ((8 * sl
) + 7));
4818 for (sct
= 0; sct
< 8; sct
++) {
4819 len
+= sprintf(page
+ len
, " %02x",
4820 sense
[8 * sl
+ sct
]);
4822 len
+= sprintf(page
+ len
, "\n");
4825 if (sense
[27] & DASD_SENSE_BIT_0
) {
4826 /* 24 Byte Sense Data */
4827 sprintf(page
+ len
, PRINTK_HEADER
4828 " 24 Byte: %x MSG %x, "
4829 "%s MSGb to SYSOP\n",
4830 sense
[7] >> 4, sense
[7] & 0x0f,
4831 sense
[1] & 0x10 ? "" : "no");
4833 /* 32 Byte Sense Data */
4834 sprintf(page
+ len
, PRINTK_HEADER
4835 " 32 Byte: Format: %x "
4836 "Exception class %x\n",
4837 sense
[6] & 0x0f, sense
[22] >> 4);
4840 sprintf(page
+ len
, PRINTK_HEADER
4841 " SORRY - NO VALID SENSE AVAILABLE\n");
4844 sprintf(page
+ len
, PRINTK_HEADER
4845 " SORRY - NO TSB DATA AVAILABLE\n");
4847 printk(KERN_ERR
"%s", page
);
4848 free_page((unsigned long) page
);
4851 static void dasd_eckd_dump_sense(struct dasd_device
*device
,
4852 struct dasd_ccw_req
*req
, struct irb
*irb
)
4854 u8
*sense
= dasd_get_sense(irb
);
4856 if (scsw_is_tm(&irb
->scsw
)) {
4858 * In some cases the 'File Protected' or 'Incorrect Length'
4859 * error might be expected and log messages shouldn't be written
4860 * then. Check if the according suppress bit is set.
4862 if (sense
&& (sense
[1] & SNS1_FILE_PROTECTED
) &&
4863 test_bit(DASD_CQR_SUPPRESS_FP
, &req
->flags
))
4865 if (scsw_cstat(&irb
->scsw
) == 0x40 &&
4866 test_bit(DASD_CQR_SUPPRESS_IL
, &req
->flags
))
4869 dasd_eckd_dump_sense_tcw(device
, req
, irb
);
4872 * In some cases the 'Command Reject' or 'No Record Found'
4873 * error might be expected and log messages shouldn't be
4874 * written then. Check if the according suppress bit is set.
4876 if (sense
&& sense
[0] & SNS0_CMD_REJECT
&&
4877 test_bit(DASD_CQR_SUPPRESS_CR
, &req
->flags
))
4880 if (sense
&& sense
[1] & SNS1_NO_REC_FOUND
&&
4881 test_bit(DASD_CQR_SUPPRESS_NRF
, &req
->flags
))
4884 dasd_eckd_dump_sense_ccw(device
, req
, irb
);
4888 static int dasd_eckd_pm_freeze(struct dasd_device
*device
)
4891 * the device should be disconnected from our LCU structure
4892 * on restore we will reconnect it and reread LCU specific
4893 * information like PAV support that might have changed
4895 dasd_alias_remove_device(device
);
4896 dasd_alias_disconnect_device_from_lcu(device
);
4901 static int dasd_eckd_restore_device(struct dasd_device
*device
)
4903 struct dasd_eckd_private
*private = device
->private;
4904 struct dasd_eckd_characteristics temp_rdc_data
;
4906 struct dasd_uid temp_uid
;
4907 unsigned long flags
;
4908 unsigned long cqr_flags
= 0;
4910 /* Read Configuration Data */
4911 rc
= dasd_eckd_read_conf(device
);
4913 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
,
4914 "Read configuration data failed, rc=%d", rc
);
4918 dasd_eckd_get_uid(device
, &temp_uid
);
4919 /* Generate device unique id */
4920 rc
= dasd_eckd_generate_uid(device
);
4921 spin_lock_irqsave(get_ccwdev_lock(device
->cdev
), flags
);
4922 if (memcmp(&private->uid
, &temp_uid
, sizeof(struct dasd_uid
)) != 0)
4923 dev_err(&device
->cdev
->dev
, "The UID of the DASD has "
4925 spin_unlock_irqrestore(get_ccwdev_lock(device
->cdev
), flags
);
4929 /* register lcu with alias handling, enable PAV if this is a new lcu */
4930 rc
= dasd_alias_make_device_known_to_lcu(device
);
4934 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr_flags
);
4935 dasd_eckd_validate_server(device
, cqr_flags
);
4937 /* RE-Read Configuration Data */
4938 rc
= dasd_eckd_read_conf(device
);
4940 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
,
4941 "Read configuration data failed, rc=%d", rc
);
4945 /* Read Feature Codes */
4946 dasd_eckd_read_features(device
);
4948 /* Read Device Characteristics */
4949 rc
= dasd_generic_read_dev_chars(device
, DASD_ECKD_MAGIC
,
4950 &temp_rdc_data
, 64);
4952 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
,
4953 "Read device characteristic failed, rc=%d", rc
);
4956 spin_lock_irqsave(get_ccwdev_lock(device
->cdev
), flags
);
4957 memcpy(&private->rdc_data
, &temp_rdc_data
, sizeof(temp_rdc_data
));
4958 spin_unlock_irqrestore(get_ccwdev_lock(device
->cdev
), flags
);
4960 /* add device to alias management */
4961 dasd_alias_add_device(device
);
4966 dasd_alias_disconnect_device_from_lcu(device
);
4971 static int dasd_eckd_reload_device(struct dasd_device
*device
)
4973 struct dasd_eckd_private
*private = device
->private;
4976 struct dasd_uid uid
;
4977 unsigned long flags
;
4980 * remove device from alias handling to prevent new requests
4981 * from being scheduled on the wrong alias device
4983 dasd_alias_remove_device(device
);
4985 spin_lock_irqsave(get_ccwdev_lock(device
->cdev
), flags
);
4986 old_base
= private->uid
.base_unit_addr
;
4987 spin_unlock_irqrestore(get_ccwdev_lock(device
->cdev
), flags
);
4989 /* Read Configuration Data */
4990 rc
= dasd_eckd_read_conf(device
);
4994 rc
= dasd_eckd_generate_uid(device
);
4998 * update unit address configuration and
4999 * add device to alias management
5001 dasd_alias_update_add_device(device
);
5003 dasd_eckd_get_uid(device
, &uid
);
5005 if (old_base
!= uid
.base_unit_addr
) {
5006 if (strlen(uid
.vduit
) > 0)
5007 snprintf(print_uid
, sizeof(print_uid
),
5008 "%s.%s.%04x.%02x.%s", uid
.vendor
, uid
.serial
,
5009 uid
.ssid
, uid
.base_unit_addr
, uid
.vduit
);
5011 snprintf(print_uid
, sizeof(print_uid
),
5012 "%s.%s.%04x.%02x", uid
.vendor
, uid
.serial
,
5013 uid
.ssid
, uid
.base_unit_addr
);
5015 dev_info(&device
->cdev
->dev
,
5016 "An Alias device was reassigned to a new base device "
5017 "with UID: %s\n", print_uid
);
5025 static int dasd_eckd_read_message_buffer(struct dasd_device
*device
,
5026 struct dasd_rssd_messages
*messages
,
5029 struct dasd_rssd_messages
*message_buf
;
5030 struct dasd_psf_prssd_data
*prssdp
;
5031 struct dasd_ccw_req
*cqr
;
5035 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1 /* PSF */ + 1 /* RSSD */,
5036 (sizeof(struct dasd_psf_prssd_data
) +
5037 sizeof(struct dasd_rssd_messages
)),
5040 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
, "%s",
5041 "Could not allocate read message buffer request");
5042 return PTR_ERR(cqr
);
5047 cqr
->startdev
= device
;
5048 cqr
->memdev
= device
;
5050 cqr
->expires
= 10 * HZ
;
5051 set_bit(DASD_CQR_VERIFY_PATH
, &cqr
->flags
);
5052 /* dasd_sleep_on_immediatly does not do complex error
5053 * recovery so clear erp flag and set retry counter to
5055 clear_bit(DASD_CQR_FLAGS_USE_ERP
, &cqr
->flags
);
5058 /* Prepare for Read Subsystem Data */
5059 prssdp
= (struct dasd_psf_prssd_data
*) cqr
->data
;
5060 memset(prssdp
, 0, sizeof(struct dasd_psf_prssd_data
));
5061 prssdp
->order
= PSF_ORDER_PRSSD
;
5062 prssdp
->suborder
= 0x03; /* Message Buffer */
5063 /* all other bytes of prssdp must be zero */
5066 ccw
->cmd_code
= DASD_ECKD_CCW_PSF
;
5067 ccw
->count
= sizeof(struct dasd_psf_prssd_data
);
5068 ccw
->flags
|= CCW_FLAG_CC
;
5069 ccw
->flags
|= CCW_FLAG_SLI
;
5070 ccw
->cda
= (__u32
)(addr_t
) prssdp
;
5072 /* Read Subsystem Data - message buffer */
5073 message_buf
= (struct dasd_rssd_messages
*) (prssdp
+ 1);
5074 memset(message_buf
, 0, sizeof(struct dasd_rssd_messages
));
5077 ccw
->cmd_code
= DASD_ECKD_CCW_RSSD
;
5078 ccw
->count
= sizeof(struct dasd_rssd_messages
);
5079 ccw
->flags
|= CCW_FLAG_SLI
;
5080 ccw
->cda
= (__u32
)(addr_t
) message_buf
;
5082 cqr
->buildclk
= get_tod_clock();
5083 cqr
->status
= DASD_CQR_FILLED
;
5084 rc
= dasd_sleep_on_immediatly(cqr
);
5086 prssdp
= (struct dasd_psf_prssd_data
*) cqr
->data
;
5087 message_buf
= (struct dasd_rssd_messages
*)
5089 memcpy(messages
, message_buf
,
5090 sizeof(struct dasd_rssd_messages
));
5091 } else if (cqr
->lpm
) {
5093 * on z/VM we might not be able to do I/O on the requested path
5094 * but instead we get the required information on any path
5095 * so retry with open path mask
5100 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
,
5101 "Reading messages failed with rc=%d\n"
5103 dasd_sfree_request(cqr
, cqr
->memdev
);
5107 static int dasd_eckd_query_host_access(struct dasd_device
*device
,
5108 struct dasd_psf_query_host_access
*data
)
5110 struct dasd_eckd_private
*private = device
->private;
5111 struct dasd_psf_query_host_access
*host_access
;
5112 struct dasd_psf_prssd_data
*prssdp
;
5113 struct dasd_ccw_req
*cqr
;
5117 /* not available for HYPER PAV alias devices */
5118 if (!device
->block
&& private->lcu
->pav
== HYPER_PAV
)
5121 /* may not be supported by the storage server */
5122 if (!(private->features
.feature
[14] & 0x80))
5125 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1 /* PSF */ + 1 /* RSSD */,
5126 sizeof(struct dasd_psf_prssd_data
) + 1,
5129 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
, "%s",
5130 "Could not allocate read message buffer request");
5131 return PTR_ERR(cqr
);
5133 host_access
= kzalloc(sizeof(*host_access
), GFP_KERNEL
| GFP_DMA
);
5135 dasd_sfree_request(cqr
, device
);
5136 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
, "%s",
5137 "Could not allocate host_access buffer");
5140 cqr
->startdev
= device
;
5141 cqr
->memdev
= device
;
5144 cqr
->expires
= 10 * HZ
;
5146 /* Prepare for Read Subsystem Data */
5147 prssdp
= (struct dasd_psf_prssd_data
*) cqr
->data
;
5148 memset(prssdp
, 0, sizeof(struct dasd_psf_prssd_data
));
5149 prssdp
->order
= PSF_ORDER_PRSSD
;
5150 prssdp
->suborder
= PSF_SUBORDER_QHA
; /* query host access */
5151 /* LSS and Volume that will be queried */
5152 prssdp
->lss
= private->ned
->ID
;
5153 prssdp
->volume
= private->ned
->unit_addr
;
5154 /* all other bytes of prssdp must be zero */
5157 ccw
->cmd_code
= DASD_ECKD_CCW_PSF
;
5158 ccw
->count
= sizeof(struct dasd_psf_prssd_data
);
5159 ccw
->flags
|= CCW_FLAG_CC
;
5160 ccw
->flags
|= CCW_FLAG_SLI
;
5161 ccw
->cda
= (__u32
)(addr_t
) prssdp
;
5163 /* Read Subsystem Data - query host access */
5165 ccw
->cmd_code
= DASD_ECKD_CCW_RSSD
;
5166 ccw
->count
= sizeof(struct dasd_psf_query_host_access
);
5167 ccw
->flags
|= CCW_FLAG_SLI
;
5168 ccw
->cda
= (__u32
)(addr_t
) host_access
;
5170 cqr
->buildclk
= get_tod_clock();
5171 cqr
->status
= DASD_CQR_FILLED
;
5172 /* the command might not be supported, suppress error message */
5173 __set_bit(DASD_CQR_SUPPRESS_CR
, &cqr
->flags
);
5174 rc
= dasd_sleep_on_interruptible(cqr
);
5176 *data
= *host_access
;
5178 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
,
5179 "Reading host access data failed with rc=%d\n",
5184 dasd_sfree_request(cqr
, cqr
->memdev
);
5189 * return number of grouped devices
5191 static int dasd_eckd_host_access_count(struct dasd_device
*device
)
5193 struct dasd_psf_query_host_access
*access
;
5194 struct dasd_ckd_path_group_entry
*entry
;
5195 struct dasd_ckd_host_information
*info
;
5199 access
= kzalloc(sizeof(*access
), GFP_NOIO
);
5201 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
, "%s",
5202 "Could not allocate access buffer");
5205 rc
= dasd_eckd_query_host_access(device
, access
);
5211 info
= (struct dasd_ckd_host_information
*)
5212 access
->host_access_information
;
5213 for (i
= 0; i
< info
->entry_count
; i
++) {
5214 entry
= (struct dasd_ckd_path_group_entry
*)
5215 (info
->entry
+ i
* info
->entry_size
);
5216 if (entry
->status_flags
& DASD_ECKD_PG_GROUPED
)
5225 * write host access information to a sequential file
5227 static int dasd_hosts_print(struct dasd_device
*device
, struct seq_file
*m
)
5229 struct dasd_psf_query_host_access
*access
;
5230 struct dasd_ckd_path_group_entry
*entry
;
5231 struct dasd_ckd_host_information
*info
;
5232 char sysplex
[9] = "";
5235 access
= kzalloc(sizeof(*access
), GFP_NOIO
);
5237 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
, "%s",
5238 "Could not allocate access buffer");
5241 rc
= dasd_eckd_query_host_access(device
, access
);
5247 info
= (struct dasd_ckd_host_information
*)
5248 access
->host_access_information
;
5249 for (i
= 0; i
< info
->entry_count
; i
++) {
5250 entry
= (struct dasd_ckd_path_group_entry
*)
5251 (info
->entry
+ i
* info
->entry_size
);
5253 seq_puts(m
, "pgid ");
5254 for (j
= 0; j
< 11; j
++)
5255 seq_printf(m
, "%02x", entry
->pgid
[j
]);
5258 seq_printf(m
, "status_flags %02x\n", entry
->status_flags
);
5260 memcpy(&sysplex
, &entry
->sysplex_name
, sizeof(sysplex
) - 1);
5261 EBCASC(sysplex
, sizeof(sysplex
));
5262 seq_printf(m
, "sysplex_name %8s\n", sysplex
);
5263 /* SUPPORTED CYLINDER */
5264 seq_printf(m
, "supported_cylinder %d\n", entry
->cylinder
);
5266 seq_printf(m
, "timestamp %lu\n", (unsigned long)
5275 * Perform Subsystem Function - CUIR response
5278 dasd_eckd_psf_cuir_response(struct dasd_device
*device
, int response
,
5279 __u32 message_id
, __u8 lpum
)
5281 struct dasd_psf_cuir_response
*psf_cuir
;
5282 int pos
= pathmask_to_pos(lpum
);
5283 struct dasd_ccw_req
*cqr
;
5287 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1 /* PSF */ ,
5288 sizeof(struct dasd_psf_cuir_response
),
5292 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
5293 "Could not allocate PSF-CUIR request");
5294 return PTR_ERR(cqr
);
5297 psf_cuir
= (struct dasd_psf_cuir_response
*)cqr
->data
;
5298 psf_cuir
->order
= PSF_ORDER_CUIR_RESPONSE
;
5299 psf_cuir
->cc
= response
;
5300 psf_cuir
->chpid
= device
->path
[pos
].chpid
;
5301 psf_cuir
->message_id
= message_id
;
5302 psf_cuir
->cssid
= device
->path
[pos
].cssid
;
5303 psf_cuir
->ssid
= device
->path
[pos
].ssid
;
5305 ccw
->cmd_code
= DASD_ECKD_CCW_PSF
;
5306 ccw
->cda
= (__u32
)(addr_t
)psf_cuir
;
5307 ccw
->flags
= CCW_FLAG_SLI
;
5308 ccw
->count
= sizeof(struct dasd_psf_cuir_response
);
5310 cqr
->startdev
= device
;
5311 cqr
->memdev
= device
;
5314 cqr
->expires
= 10*HZ
;
5315 cqr
->buildclk
= get_tod_clock();
5316 cqr
->status
= DASD_CQR_FILLED
;
5317 set_bit(DASD_CQR_VERIFY_PATH
, &cqr
->flags
);
5319 rc
= dasd_sleep_on(cqr
);
5321 dasd_sfree_request(cqr
, cqr
->memdev
);
5326 * return configuration data that is referenced by record selector
5327 * if a record selector is specified or per default return the
5328 * conf_data pointer for the path specified by lpum
5330 static struct dasd_conf_data
*dasd_eckd_get_ref_conf(struct dasd_device
*device
,
5332 struct dasd_cuir_message
*cuir
)
5334 struct dasd_conf_data
*conf_data
;
5337 if (cuir
->record_selector
== 0)
5339 for (path
= 0x80, pos
= 0; path
; path
>>= 1, pos
++) {
5340 conf_data
= device
->path
[pos
].conf_data
;
5341 if (conf_data
->gneq
.record_selector
==
5342 cuir
->record_selector
)
5346 return device
->path
[pathmask_to_pos(lpum
)].conf_data
;
5350 * This function determines the scope of a reconfiguration request by
5351 * analysing the path and device selection data provided in the CUIR request.
5352 * Returns a path mask containing CUIR affected paths for the give device.
5354 * If the CUIR request does not contain the required information return the
5355 * path mask of the path the attention message for the CUIR request was reveived
5358 static int dasd_eckd_cuir_scope(struct dasd_device
*device
, __u8 lpum
,
5359 struct dasd_cuir_message
*cuir
)
5361 struct dasd_conf_data
*ref_conf_data
;
5362 unsigned long bitmask
= 0, mask
= 0;
5363 struct dasd_conf_data
*conf_data
;
5364 unsigned int pos
, path
;
5365 char *ref_gneq
, *gneq
;
5366 char *ref_ned
, *ned
;
5369 /* if CUIR request does not specify the scope use the path
5370 the attention message was presented on */
5371 if (!cuir
->ned_map
||
5372 !(cuir
->neq_map
[0] | cuir
->neq_map
[1] | cuir
->neq_map
[2]))
5375 /* get reference conf data */
5376 ref_conf_data
= dasd_eckd_get_ref_conf(device
, lpum
, cuir
);
5377 /* reference ned is determined by ned_map field */
5378 pos
= 8 - ffs(cuir
->ned_map
);
5379 ref_ned
= (char *)&ref_conf_data
->neds
[pos
];
5380 ref_gneq
= (char *)&ref_conf_data
->gneq
;
5381 /* transfer 24 bit neq_map to mask */
5382 mask
= cuir
->neq_map
[2];
5383 mask
|= cuir
->neq_map
[1] << 8;
5384 mask
|= cuir
->neq_map
[0] << 16;
5386 for (path
= 0; path
< 8; path
++) {
5387 /* initialise data per path */
5389 conf_data
= device
->path
[path
].conf_data
;
5390 pos
= 8 - ffs(cuir
->ned_map
);
5391 ned
= (char *) &conf_data
->neds
[pos
];
5392 /* compare reference ned and per path ned */
5393 if (memcmp(ref_ned
, ned
, sizeof(*ned
)) != 0)
5395 gneq
= (char *)&conf_data
->gneq
;
5396 /* compare reference gneq and per_path gneq under
5397 24 bit mask where mask bit 0 equals byte 7 of
5398 the gneq and mask bit 24 equals byte 31 */
5400 pos
= ffs(bitmask
) - 1;
5401 if (memcmp(&ref_gneq
[31 - pos
], &gneq
[31 - pos
], 1)
5404 clear_bit(pos
, &bitmask
);
5408 /* device and path match the reference values
5409 add path to CUIR scope */
5410 tbcpm
|= 0x80 >> path
;
5415 static void dasd_eckd_cuir_notify_user(struct dasd_device
*device
,
5416 unsigned long paths
, int action
)
5421 /* get position of bit in mask */
5422 pos
= 8 - ffs(paths
);
5423 /* get channel path descriptor from this position */
5424 if (action
== CUIR_QUIESCE
)
5425 pr_warn("Service on the storage server caused path %x.%02x to go offline",
5426 device
->path
[pos
].cssid
,
5427 device
->path
[pos
].chpid
);
5428 else if (action
== CUIR_RESUME
)
5429 pr_info("Path %x.%02x is back online after service on the storage server",
5430 device
->path
[pos
].cssid
,
5431 device
->path
[pos
].chpid
);
5432 clear_bit(7 - pos
, &paths
);
5436 static int dasd_eckd_cuir_remove_path(struct dasd_device
*device
, __u8 lpum
,
5437 struct dasd_cuir_message
*cuir
)
5439 unsigned long tbcpm
;
5441 tbcpm
= dasd_eckd_cuir_scope(device
, lpum
, cuir
);
5442 /* nothing to do if path is not in use */
5443 if (!(dasd_path_get_opm(device
) & tbcpm
))
5445 if (!(dasd_path_get_opm(device
) & ~tbcpm
)) {
5446 /* no path would be left if the CUIR action is taken
5450 /* remove device from operational path mask */
5451 dasd_path_remove_opm(device
, tbcpm
);
5452 dasd_path_add_cuirpm(device
, tbcpm
);
5457 * walk through all devices and build a path mask to quiesce them
5458 * return an error if the last path to a device would be removed
5460 * if only part of the devices are quiesced and an error
5461 * occurs no onlining necessary, the storage server will
5462 * notify the already set offline devices again
5464 static int dasd_eckd_cuir_quiesce(struct dasd_device
*device
, __u8 lpum
,
5465 struct dasd_cuir_message
*cuir
)
5467 struct dasd_eckd_private
*private = device
->private;
5468 struct alias_pav_group
*pavgroup
, *tempgroup
;
5469 struct dasd_device
*dev
, *n
;
5470 unsigned long paths
= 0;
5471 unsigned long flags
;
5474 /* active devices */
5475 list_for_each_entry_safe(dev
, n
, &private->lcu
->active_devices
,
5477 spin_lock_irqsave(get_ccwdev_lock(dev
->cdev
), flags
);
5478 tbcpm
= dasd_eckd_cuir_remove_path(dev
, lpum
, cuir
);
5479 spin_unlock_irqrestore(get_ccwdev_lock(dev
->cdev
), flags
);
5484 /* inactive devices */
5485 list_for_each_entry_safe(dev
, n
, &private->lcu
->inactive_devices
,
5487 spin_lock_irqsave(get_ccwdev_lock(dev
->cdev
), flags
);
5488 tbcpm
= dasd_eckd_cuir_remove_path(dev
, lpum
, cuir
);
5489 spin_unlock_irqrestore(get_ccwdev_lock(dev
->cdev
), flags
);
5494 /* devices in PAV groups */
5495 list_for_each_entry_safe(pavgroup
, tempgroup
,
5496 &private->lcu
->grouplist
, group
) {
5497 list_for_each_entry_safe(dev
, n
, &pavgroup
->baselist
,
5499 spin_lock_irqsave(get_ccwdev_lock(dev
->cdev
), flags
);
5500 tbcpm
= dasd_eckd_cuir_remove_path(dev
, lpum
, cuir
);
5501 spin_unlock_irqrestore(
5502 get_ccwdev_lock(dev
->cdev
), flags
);
5507 list_for_each_entry_safe(dev
, n
, &pavgroup
->aliaslist
,
5509 spin_lock_irqsave(get_ccwdev_lock(dev
->cdev
), flags
);
5510 tbcpm
= dasd_eckd_cuir_remove_path(dev
, lpum
, cuir
);
5511 spin_unlock_irqrestore(
5512 get_ccwdev_lock(dev
->cdev
), flags
);
5518 /* notify user about all paths affected by CUIR action */
5519 dasd_eckd_cuir_notify_user(device
, paths
, CUIR_QUIESCE
);
5525 static int dasd_eckd_cuir_resume(struct dasd_device
*device
, __u8 lpum
,
5526 struct dasd_cuir_message
*cuir
)
5528 struct dasd_eckd_private
*private = device
->private;
5529 struct alias_pav_group
*pavgroup
, *tempgroup
;
5530 struct dasd_device
*dev
, *n
;
5531 unsigned long paths
= 0;
5535 * the path may have been added through a generic path event before
5536 * only trigger path verification if the path is not already in use
5538 list_for_each_entry_safe(dev
, n
,
5539 &private->lcu
->active_devices
,
5541 tbcpm
= dasd_eckd_cuir_scope(dev
, lpum
, cuir
);
5543 if (!(dasd_path_get_opm(dev
) & tbcpm
)) {
5544 dasd_path_add_tbvpm(dev
, tbcpm
);
5545 dasd_schedule_device_bh(dev
);
5548 list_for_each_entry_safe(dev
, n
,
5549 &private->lcu
->inactive_devices
,
5551 tbcpm
= dasd_eckd_cuir_scope(dev
, lpum
, cuir
);
5553 if (!(dasd_path_get_opm(dev
) & tbcpm
)) {
5554 dasd_path_add_tbvpm(dev
, tbcpm
);
5555 dasd_schedule_device_bh(dev
);
5558 /* devices in PAV groups */
5559 list_for_each_entry_safe(pavgroup
, tempgroup
,
5560 &private->lcu
->grouplist
,
5562 list_for_each_entry_safe(dev
, n
,
5563 &pavgroup
->baselist
,
5565 tbcpm
= dasd_eckd_cuir_scope(dev
, lpum
, cuir
);
5567 if (!(dasd_path_get_opm(dev
) & tbcpm
)) {
5568 dasd_path_add_tbvpm(dev
, tbcpm
);
5569 dasd_schedule_device_bh(dev
);
5572 list_for_each_entry_safe(dev
, n
,
5573 &pavgroup
->aliaslist
,
5575 tbcpm
= dasd_eckd_cuir_scope(dev
, lpum
, cuir
);
5577 if (!(dasd_path_get_opm(dev
) & tbcpm
)) {
5578 dasd_path_add_tbvpm(dev
, tbcpm
);
5579 dasd_schedule_device_bh(dev
);
5583 /* notify user about all paths affected by CUIR action */
5584 dasd_eckd_cuir_notify_user(device
, paths
, CUIR_RESUME
);
5588 static void dasd_eckd_handle_cuir(struct dasd_device
*device
, void *messages
,
5591 struct dasd_cuir_message
*cuir
= messages
;
5594 DBF_DEV_EVENT(DBF_WARNING
, device
,
5595 "CUIR request: %016llx %016llx %016llx %08x",
5596 ((u64
*)cuir
)[0], ((u64
*)cuir
)[1], ((u64
*)cuir
)[2],
5599 if (cuir
->code
== CUIR_QUIESCE
) {
5601 if (dasd_eckd_cuir_quiesce(device
, lpum
, cuir
))
5602 response
= PSF_CUIR_LAST_PATH
;
5604 response
= PSF_CUIR_COMPLETED
;
5605 } else if (cuir
->code
== CUIR_RESUME
) {
5607 dasd_eckd_cuir_resume(device
, lpum
, cuir
);
5608 response
= PSF_CUIR_COMPLETED
;
5610 response
= PSF_CUIR_NOT_SUPPORTED
;
5612 dasd_eckd_psf_cuir_response(device
, response
,
5613 cuir
->message_id
, lpum
);
5614 DBF_DEV_EVENT(DBF_WARNING
, device
,
5615 "CUIR response: %d on message ID %08x", response
,
5617 /* to make sure there is no attention left schedule work again */
5618 device
->discipline
->check_attention(device
, lpum
);
5621 static void dasd_eckd_check_attention_work(struct work_struct
*work
)
5623 struct check_attention_work_data
*data
;
5624 struct dasd_rssd_messages
*messages
;
5625 struct dasd_device
*device
;
5628 data
= container_of(work
, struct check_attention_work_data
, worker
);
5629 device
= data
->device
;
5630 messages
= kzalloc(sizeof(*messages
), GFP_KERNEL
);
5632 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
5633 "Could not allocate attention message buffer");
5636 rc
= dasd_eckd_read_message_buffer(device
, messages
, data
->lpum
);
5639 if (messages
->length
== ATTENTION_LENGTH_CUIR
&&
5640 messages
->format
== ATTENTION_FORMAT_CUIR
)
5641 dasd_eckd_handle_cuir(device
, messages
, data
->lpum
);
5643 dasd_put_device(device
);
5648 static int dasd_eckd_check_attention(struct dasd_device
*device
, __u8 lpum
)
5650 struct check_attention_work_data
*data
;
5652 data
= kzalloc(sizeof(*data
), GFP_ATOMIC
);
5655 INIT_WORK(&data
->worker
, dasd_eckd_check_attention_work
);
5656 dasd_get_device(device
);
5657 data
->device
= device
;
5659 schedule_work(&data
->worker
);
5663 static int dasd_eckd_disable_hpf_path(struct dasd_device
*device
, __u8 lpum
)
5665 if (~lpum
& dasd_path_get_opm(device
)) {
5666 dasd_path_add_nohpfpm(device
, lpum
);
5667 dasd_path_remove_opm(device
, lpum
);
5668 dev_err(&device
->cdev
->dev
,
5669 "Channel path %02X lost HPF functionality and is disabled\n",
5676 static void dasd_eckd_disable_hpf_device(struct dasd_device
*device
)
5678 struct dasd_eckd_private
*private = device
->private;
5680 dev_err(&device
->cdev
->dev
,
5681 "High Performance FICON disabled\n");
5682 private->fcx_max_data
= 0;
5685 static int dasd_eckd_hpf_enabled(struct dasd_device
*device
)
5687 struct dasd_eckd_private
*private = device
->private;
5689 return private->fcx_max_data
? 1 : 0;
5692 static void dasd_eckd_handle_hpf_error(struct dasd_device
*device
,
5695 struct dasd_eckd_private
*private = device
->private;
5697 if (!private->fcx_max_data
) {
5698 /* sanity check for no HPF, the error makes no sense */
5699 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
5700 "Trying to disable HPF for a non HPF device");
5703 if (irb
->scsw
.tm
.sesq
== SCSW_SESQ_DEV_NOFCX
) {
5704 dasd_eckd_disable_hpf_device(device
);
5705 } else if (irb
->scsw
.tm
.sesq
== SCSW_SESQ_PATH_NOFCX
) {
5706 if (dasd_eckd_disable_hpf_path(device
, irb
->esw
.esw1
.lpum
))
5708 dasd_eckd_disable_hpf_device(device
);
5709 dasd_path_set_tbvpm(device
,
5710 dasd_path_get_hpfpm(device
));
5713 * prevent that any new I/O ist started on the device and schedule a
5714 * requeue of existing requests
5716 dasd_device_set_stop_bits(device
, DASD_STOPPED_NOT_ACC
);
5717 dasd_schedule_requeue(device
);
5720 static struct ccw_driver dasd_eckd_driver
= {
5722 .name
= "dasd-eckd",
5723 .owner
= THIS_MODULE
,
5725 .ids
= dasd_eckd_ids
,
5726 .probe
= dasd_eckd_probe
,
5727 .remove
= dasd_generic_remove
,
5728 .set_offline
= dasd_generic_set_offline
,
5729 .set_online
= dasd_eckd_set_online
,
5730 .notify
= dasd_generic_notify
,
5731 .path_event
= dasd_generic_path_event
,
5732 .shutdown
= dasd_generic_shutdown
,
5733 .freeze
= dasd_generic_pm_freeze
,
5734 .thaw
= dasd_generic_restore_device
,
5735 .restore
= dasd_generic_restore_device
,
5736 .uc_handler
= dasd_generic_uc_handler
,
5737 .int_class
= IRQIO_DAS
,
5741 * max_blocks is dependent on the amount of storage that is available
5742 * in the static io buffer for each device. Currently each device has
5743 * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has
5744 * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use
5745 * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In
5746 * addition we have one define extent ccw + 16 bytes of data and one
5747 * locate record ccw + 16 bytes of data. That makes:
5748 * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum.
5749 * We want to fit two into the available memory so that we can immediately
5750 * start the next request if one finishes off. That makes 249.5 blocks
5751 * for one request. Give a little safety and the result is 240.
5753 static struct dasd_discipline dasd_eckd_discipline
= {
5754 .owner
= THIS_MODULE
,
5758 .check_device
= dasd_eckd_check_characteristics
,
5759 .uncheck_device
= dasd_eckd_uncheck_device
,
5760 .do_analysis
= dasd_eckd_do_analysis
,
5761 .verify_path
= dasd_eckd_verify_path
,
5762 .basic_to_ready
= dasd_eckd_basic_to_ready
,
5763 .online_to_ready
= dasd_eckd_online_to_ready
,
5764 .basic_to_known
= dasd_eckd_basic_to_known
,
5765 .fill_geometry
= dasd_eckd_fill_geometry
,
5766 .start_IO
= dasd_start_IO
,
5767 .term_IO
= dasd_term_IO
,
5768 .handle_terminated_request
= dasd_eckd_handle_terminated_request
,
5769 .format_device
= dasd_eckd_format_device
,
5770 .check_device_format
= dasd_eckd_check_device_format
,
5771 .erp_action
= dasd_eckd_erp_action
,
5772 .erp_postaction
= dasd_eckd_erp_postaction
,
5773 .check_for_device_change
= dasd_eckd_check_for_device_change
,
5774 .build_cp
= dasd_eckd_build_alias_cp
,
5775 .free_cp
= dasd_eckd_free_alias_cp
,
5776 .dump_sense
= dasd_eckd_dump_sense
,
5777 .dump_sense_dbf
= dasd_eckd_dump_sense_dbf
,
5778 .fill_info
= dasd_eckd_fill_info
,
5779 .ioctl
= dasd_eckd_ioctl
,
5780 .freeze
= dasd_eckd_pm_freeze
,
5781 .restore
= dasd_eckd_restore_device
,
5782 .reload
= dasd_eckd_reload_device
,
5783 .get_uid
= dasd_eckd_get_uid
,
5784 .kick_validate
= dasd_eckd_kick_validate_server
,
5785 .check_attention
= dasd_eckd_check_attention
,
5786 .host_access_count
= dasd_eckd_host_access_count
,
5787 .hosts_print
= dasd_hosts_print
,
5788 .handle_hpf_error
= dasd_eckd_handle_hpf_error
,
5789 .disable_hpf
= dasd_eckd_disable_hpf_device
,
5790 .hpf_enabled
= dasd_eckd_hpf_enabled
,
5791 .reset_path
= dasd_eckd_reset_path
,
5795 dasd_eckd_init(void)
5799 ASCEBC(dasd_eckd_discipline
.ebcname
, 4);
5800 dasd_reserve_req
= kmalloc(sizeof(*dasd_reserve_req
),
5801 GFP_KERNEL
| GFP_DMA
);
5802 if (!dasd_reserve_req
)
5804 path_verification_worker
= kmalloc(sizeof(*path_verification_worker
),
5805 GFP_KERNEL
| GFP_DMA
);
5806 if (!path_verification_worker
) {
5807 kfree(dasd_reserve_req
);
5810 rawpadpage
= (void *)__get_free_page(GFP_KERNEL
);
5812 kfree(path_verification_worker
);
5813 kfree(dasd_reserve_req
);
5816 ret
= ccw_driver_register(&dasd_eckd_driver
);
5818 wait_for_device_probe();
5820 kfree(path_verification_worker
);
5821 kfree(dasd_reserve_req
);
5822 free_page((unsigned long)rawpadpage
);
5828 dasd_eckd_cleanup(void)
5830 ccw_driver_unregister(&dasd_eckd_driver
);
5831 kfree(path_verification_worker
);
5832 kfree(dasd_reserve_req
);
5833 free_page((unsigned long)rawpadpage
);
5836 module_init(dasd_eckd_init
);
5837 module_exit(dasd_eckd_cleanup
);