2 * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
3 * Horst Hummel <Horst.Hummel@de.ibm.com>
4 * Carsten Otte <Cotte@de.ibm.com>
5 * Martin Schwidefsky <schwidefsky@de.ibm.com>
6 * Bugreports.to..: <Linux390@de.ibm.com>
7 * Copyright IBM Corp. 1999, 2009
8 * EMC Symmetrix ioctl Copyright EMC Corporation, 2008
9 * Author.........: Nigel Hislop <hislop_nigel@emc.com>
12 #define KMSG_COMPONENT "dasd-eckd"
14 #include <linux/stddef.h>
15 #include <linux/kernel.h>
16 #include <linux/slab.h>
17 #include <linux/hdreg.h> /* HDIO_GETGEO */
18 #include <linux/bio.h>
19 #include <linux/module.h>
20 #include <linux/compat.h>
21 #include <linux/init.h>
23 #include <asm/debug.h>
24 #include <asm/idals.h>
25 #include <asm/ebcdic.h>
27 #include <asm/uaccess.h>
29 #include <asm/ccwdev.h>
33 #include "dasd_eckd.h"
34 #include "../cio/chsc.h"
39 #endif /* PRINTK_HEADER */
40 #define PRINTK_HEADER "dasd(eckd):"
42 #define ECKD_C0(i) (i->home_bytes)
43 #define ECKD_F(i) (i->formula)
44 #define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\
45 (i->factors.f_0x02.f1))
46 #define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\
47 (i->factors.f_0x02.f2))
48 #define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\
49 (i->factors.f_0x02.f3))
50 #define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0)
51 #define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0)
52 #define ECKD_F6(i) (i->factor6)
53 #define ECKD_F7(i) (i->factor7)
54 #define ECKD_F8(i) (i->factor8)
57 * raw track access always map to 64k in memory
58 * so it maps to 16 blocks of 4k per track
60 #define DASD_RAW_BLOCK_PER_TRACK 16
61 #define DASD_RAW_BLOCKSIZE 4096
62 /* 64k are 128 x 512 byte sectors */
63 #define DASD_RAW_SECTORS_PER_TRACK 128
65 MODULE_LICENSE("GPL");
67 static struct dasd_discipline dasd_eckd_discipline
;
69 /* The ccw bus type uses this table to find devices that it sends to
71 static struct ccw_device_id dasd_eckd_ids
[] = {
72 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info
= 0x1},
73 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info
= 0x2},
74 { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3380, 0), .driver_info
= 0x3},
75 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info
= 0x4},
76 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info
= 0x5},
77 { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info
= 0x6},
78 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info
= 0x7},
79 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info
= 0x8},
80 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info
= 0x9},
81 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info
= 0xa},
82 { /* end of list */ },
85 MODULE_DEVICE_TABLE(ccw
, dasd_eckd_ids
);
87 static struct ccw_driver dasd_eckd_driver
; /* see below */
90 #define INIT_CQR_UNFORMATTED 1
91 #define INIT_CQR_ERROR 2
93 /* emergency request for reserve/release */
95 struct dasd_ccw_req cqr
;
99 static DEFINE_MUTEX(dasd_reserve_mutex
);
101 /* definitions for the path verification worker */
102 struct path_verification_work_data
{
103 struct work_struct worker
;
104 struct dasd_device
*device
;
105 struct dasd_ccw_req cqr
;
107 __u8 rcd_buffer
[DASD_ECKD_RCD_DATA_SIZE
];
111 static struct path_verification_work_data
*path_verification_worker
;
112 static DEFINE_MUTEX(dasd_path_verification_mutex
);
114 /* initial attempt at a probe function. this can be simplified once
115 * the other detection code is gone */
117 dasd_eckd_probe (struct ccw_device
*cdev
)
121 /* set ECKD specific ccw-device options */
122 ret
= ccw_device_set_options(cdev
, CCWDEV_ALLOW_FORCE
|
123 CCWDEV_DO_PATHGROUP
| CCWDEV_DO_MULTIPATH
);
125 DBF_EVENT_DEVID(DBF_WARNING
, cdev
, "%s",
126 "dasd_eckd_probe: could not set "
127 "ccw-device options");
130 ret
= dasd_generic_probe(cdev
, &dasd_eckd_discipline
);
135 dasd_eckd_set_online(struct ccw_device
*cdev
)
137 return dasd_generic_set_online(cdev
, &dasd_eckd_discipline
);
140 static const int sizes_trk0
[] = { 28, 148, 84 };
141 #define LABEL_SIZE 140
143 static inline unsigned int
144 round_up_multiple(unsigned int no
, unsigned int mult
)
147 return (rem
? no
- rem
+ mult
: no
);
150 static inline unsigned int
151 ceil_quot(unsigned int d1
, unsigned int d2
)
153 return (d1
+ (d2
- 1)) / d2
;
157 recs_per_track(struct dasd_eckd_characteristics
* rdc
,
158 unsigned int kl
, unsigned int dl
)
162 switch (rdc
->dev_type
) {
165 return 1499 / (15 + 7 + ceil_quot(kl
+ 12, 32) +
166 ceil_quot(dl
+ 12, 32));
168 return 1499 / (15 + ceil_quot(dl
+ 12, 32));
170 dn
= ceil_quot(dl
+ 6, 232) + 1;
172 kn
= ceil_quot(kl
+ 6, 232) + 1;
173 return 1729 / (10 + 9 + ceil_quot(kl
+ 6 * kn
, 34) +
174 9 + ceil_quot(dl
+ 6 * dn
, 34));
176 return 1729 / (10 + 9 + ceil_quot(dl
+ 6 * dn
, 34));
178 dn
= ceil_quot(dl
+ 6, 232) + 1;
180 kn
= ceil_quot(kl
+ 6, 232) + 1;
181 return 1420 / (18 + 7 + ceil_quot(kl
+ 6 * kn
, 34) +
182 ceil_quot(dl
+ 6 * dn
, 34));
184 return 1420 / (18 + 7 + ceil_quot(dl
+ 6 * dn
, 34));
189 static void set_ch_t(struct ch_t
*geo
, __u32 cyl
, __u8 head
)
191 geo
->cyl
= (__u16
) cyl
;
192 geo
->head
= cyl
>> 16;
198 check_XRC (struct ccw1
*de_ccw
,
199 struct DE_eckd_data
*data
,
200 struct dasd_device
*device
)
202 struct dasd_eckd_private
*private;
205 private = (struct dasd_eckd_private
*) device
->private;
206 if (!private->rdc_data
.facilities
.XRC_supported
)
209 /* switch on System Time Stamp - needed for XRC Support */
210 data
->ga_extended
|= 0x08; /* switch on 'Time Stamp Valid' */
211 data
->ga_extended
|= 0x02; /* switch on 'Extended Parameter' */
213 rc
= get_sync_clock(&data
->ep_sys_time
);
214 /* Ignore return code if sync clock is switched off. */
215 if (rc
== -ENOSYS
|| rc
== -EACCES
)
218 de_ccw
->count
= sizeof(struct DE_eckd_data
);
219 de_ccw
->flags
|= CCW_FLAG_SLI
;
224 define_extent(struct ccw1
*ccw
, struct DE_eckd_data
*data
, unsigned int trk
,
225 unsigned int totrk
, int cmd
, struct dasd_device
*device
)
227 struct dasd_eckd_private
*private;
229 u16 heads
, beghead
, endhead
;
232 private = (struct dasd_eckd_private
*) device
->private;
234 ccw
->cmd_code
= DASD_ECKD_CCW_DEFINE_EXTENT
;
237 ccw
->cda
= (__u32
) __pa(data
);
239 memset(data
, 0, sizeof(struct DE_eckd_data
));
241 case DASD_ECKD_CCW_READ_HOME_ADDRESS
:
242 case DASD_ECKD_CCW_READ_RECORD_ZERO
:
243 case DASD_ECKD_CCW_READ
:
244 case DASD_ECKD_CCW_READ_MT
:
245 case DASD_ECKD_CCW_READ_CKD
:
246 case DASD_ECKD_CCW_READ_CKD_MT
:
247 case DASD_ECKD_CCW_READ_KD
:
248 case DASD_ECKD_CCW_READ_KD_MT
:
249 case DASD_ECKD_CCW_READ_COUNT
:
250 data
->mask
.perm
= 0x1;
251 data
->attributes
.operation
= private->attrib
.operation
;
253 case DASD_ECKD_CCW_WRITE
:
254 case DASD_ECKD_CCW_WRITE_MT
:
255 case DASD_ECKD_CCW_WRITE_KD
:
256 case DASD_ECKD_CCW_WRITE_KD_MT
:
257 data
->mask
.perm
= 0x02;
258 data
->attributes
.operation
= private->attrib
.operation
;
259 rc
= check_XRC (ccw
, data
, device
);
261 case DASD_ECKD_CCW_WRITE_CKD
:
262 case DASD_ECKD_CCW_WRITE_CKD_MT
:
263 data
->attributes
.operation
= DASD_BYPASS_CACHE
;
264 rc
= check_XRC (ccw
, data
, device
);
266 case DASD_ECKD_CCW_ERASE
:
267 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS
:
268 case DASD_ECKD_CCW_WRITE_RECORD_ZERO
:
269 data
->mask
.perm
= 0x3;
270 data
->mask
.auth
= 0x1;
271 data
->attributes
.operation
= DASD_BYPASS_CACHE
;
272 rc
= check_XRC (ccw
, data
, device
);
275 dev_err(&device
->cdev
->dev
,
276 "0x%x is not a known command\n", cmd
);
280 data
->attributes
.mode
= 0x3; /* ECKD */
282 if ((private->rdc_data
.cu_type
== 0x2105 ||
283 private->rdc_data
.cu_type
== 0x2107 ||
284 private->rdc_data
.cu_type
== 0x1750)
285 && !(private->uses_cdl
&& trk
< 2))
286 data
->ga_extended
|= 0x40; /* Regular Data Format Mode */
288 heads
= private->rdc_data
.trk_per_cyl
;
289 begcyl
= trk
/ heads
;
290 beghead
= trk
% heads
;
291 endcyl
= totrk
/ heads
;
292 endhead
= totrk
% heads
;
294 /* check for sequential prestage - enhance cylinder range */
295 if (data
->attributes
.operation
== DASD_SEQ_PRESTAGE
||
296 data
->attributes
.operation
== DASD_SEQ_ACCESS
) {
298 if (endcyl
+ private->attrib
.nr_cyl
< private->real_cyl
)
299 endcyl
+= private->attrib
.nr_cyl
;
301 endcyl
= (private->real_cyl
- 1);
304 set_ch_t(&data
->beg_ext
, begcyl
, beghead
);
305 set_ch_t(&data
->end_ext
, endcyl
, endhead
);
309 static int check_XRC_on_prefix(struct PFX_eckd_data
*pfxdata
,
310 struct dasd_device
*device
)
312 struct dasd_eckd_private
*private;
315 private = (struct dasd_eckd_private
*) device
->private;
316 if (!private->rdc_data
.facilities
.XRC_supported
)
319 /* switch on System Time Stamp - needed for XRC Support */
320 pfxdata
->define_extent
.ga_extended
|= 0x08; /* 'Time Stamp Valid' */
321 pfxdata
->define_extent
.ga_extended
|= 0x02; /* 'Extended Parameter' */
322 pfxdata
->validity
.time_stamp
= 1; /* 'Time Stamp Valid' */
324 rc
= get_sync_clock(&pfxdata
->define_extent
.ep_sys_time
);
325 /* Ignore return code if sync clock is switched off. */
326 if (rc
== -ENOSYS
|| rc
== -EACCES
)
331 static void fill_LRE_data(struct LRE_eckd_data
*data
, unsigned int trk
,
332 unsigned int rec_on_trk
, int count
, int cmd
,
333 struct dasd_device
*device
, unsigned int reclen
,
336 struct dasd_eckd_private
*private;
340 private = (struct dasd_eckd_private
*) device
->private;
342 memset(data
, 0, sizeof(*data
));
345 switch (private->rdc_data
.dev_type
) {
347 dn
= ceil_quot(reclen
+ 6, 232);
348 d
= 9 + ceil_quot(reclen
+ 6 * (dn
+ 1), 34);
349 sector
= (49 + (rec_on_trk
- 1) * (10 + d
)) / 8;
352 d
= 7 + ceil_quot(reclen
+ 12, 32);
353 sector
= (39 + (rec_on_trk
- 1) * (8 + d
)) / 7;
357 data
->sector
= sector
;
358 /* note: meaning of count depends on the operation
359 * for record based I/O it's the number of records, but for
360 * track based I/O it's the number of tracks
364 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS
:
365 data
->operation
.orientation
= 0x3;
366 data
->operation
.operation
= 0x03;
368 case DASD_ECKD_CCW_READ_HOME_ADDRESS
:
369 data
->operation
.orientation
= 0x3;
370 data
->operation
.operation
= 0x16;
372 case DASD_ECKD_CCW_WRITE_RECORD_ZERO
:
373 data
->operation
.orientation
= 0x1;
374 data
->operation
.operation
= 0x03;
377 case DASD_ECKD_CCW_READ_RECORD_ZERO
:
378 data
->operation
.orientation
= 0x3;
379 data
->operation
.operation
= 0x16;
382 case DASD_ECKD_CCW_WRITE
:
383 case DASD_ECKD_CCW_WRITE_MT
:
384 case DASD_ECKD_CCW_WRITE_KD
:
385 case DASD_ECKD_CCW_WRITE_KD_MT
:
386 data
->auxiliary
.length_valid
= 0x1;
387 data
->length
= reclen
;
388 data
->operation
.operation
= 0x01;
390 case DASD_ECKD_CCW_WRITE_CKD
:
391 case DASD_ECKD_CCW_WRITE_CKD_MT
:
392 data
->auxiliary
.length_valid
= 0x1;
393 data
->length
= reclen
;
394 data
->operation
.operation
= 0x03;
396 case DASD_ECKD_CCW_WRITE_FULL_TRACK
:
397 data
->operation
.orientation
= 0x0;
398 data
->operation
.operation
= 0x3F;
399 data
->extended_operation
= 0x11;
401 data
->extended_parameter_length
= 0x02;
402 if (data
->count
> 8) {
403 data
->extended_parameter
[0] = 0xFF;
404 data
->extended_parameter
[1] = 0xFF;
405 data
->extended_parameter
[1] <<= (16 - count
);
407 data
->extended_parameter
[0] = 0xFF;
408 data
->extended_parameter
[0] <<= (8 - count
);
409 data
->extended_parameter
[1] = 0x00;
413 case DASD_ECKD_CCW_WRITE_TRACK_DATA
:
414 data
->auxiliary
.length_valid
= 0x1;
415 data
->length
= reclen
; /* not tlf, as one might think */
416 data
->operation
.operation
= 0x3F;
417 data
->extended_operation
= 0x23;
419 case DASD_ECKD_CCW_READ
:
420 case DASD_ECKD_CCW_READ_MT
:
421 case DASD_ECKD_CCW_READ_KD
:
422 case DASD_ECKD_CCW_READ_KD_MT
:
423 data
->auxiliary
.length_valid
= 0x1;
424 data
->length
= reclen
;
425 data
->operation
.operation
= 0x06;
427 case DASD_ECKD_CCW_READ_CKD
:
428 case DASD_ECKD_CCW_READ_CKD_MT
:
429 data
->auxiliary
.length_valid
= 0x1;
430 data
->length
= reclen
;
431 data
->operation
.operation
= 0x16;
433 case DASD_ECKD_CCW_READ_COUNT
:
434 data
->operation
.operation
= 0x06;
436 case DASD_ECKD_CCW_READ_TRACK
:
437 data
->operation
.orientation
= 0x1;
438 data
->operation
.operation
= 0x0C;
439 data
->extended_parameter_length
= 0;
442 case DASD_ECKD_CCW_READ_TRACK_DATA
:
443 data
->auxiliary
.length_valid
= 0x1;
445 data
->operation
.operation
= 0x0C;
447 case DASD_ECKD_CCW_ERASE
:
448 data
->length
= reclen
;
449 data
->auxiliary
.length_valid
= 0x1;
450 data
->operation
.operation
= 0x0b;
453 DBF_DEV_EVENT(DBF_ERR
, device
,
454 "fill LRE unknown opcode 0x%x", cmd
);
457 set_ch_t(&data
->seek_addr
,
458 trk
/ private->rdc_data
.trk_per_cyl
,
459 trk
% private->rdc_data
.trk_per_cyl
);
460 data
->search_arg
.cyl
= data
->seek_addr
.cyl
;
461 data
->search_arg
.head
= data
->seek_addr
.head
;
462 data
->search_arg
.record
= rec_on_trk
;
465 static int prefix_LRE(struct ccw1
*ccw
, struct PFX_eckd_data
*pfxdata
,
466 unsigned int trk
, unsigned int totrk
, int cmd
,
467 struct dasd_device
*basedev
, struct dasd_device
*startdev
,
468 unsigned char format
, unsigned int rec_on_trk
, int count
,
469 unsigned int blksize
, unsigned int tlf
)
471 struct dasd_eckd_private
*basepriv
, *startpriv
;
472 struct DE_eckd_data
*dedata
;
473 struct LRE_eckd_data
*lredata
;
475 u16 heads
, beghead
, endhead
;
478 basepriv
= (struct dasd_eckd_private
*) basedev
->private;
479 startpriv
= (struct dasd_eckd_private
*) startdev
->private;
480 dedata
= &pfxdata
->define_extent
;
481 lredata
= &pfxdata
->locate_record
;
483 ccw
->cmd_code
= DASD_ECKD_CCW_PFX
;
485 if (cmd
== DASD_ECKD_CCW_WRITE_FULL_TRACK
) {
486 ccw
->count
= sizeof(*pfxdata
) + 2;
487 ccw
->cda
= (__u32
) __pa(pfxdata
);
488 memset(pfxdata
, 0, sizeof(*pfxdata
) + 2);
490 ccw
->count
= sizeof(*pfxdata
);
491 ccw
->cda
= (__u32
) __pa(pfxdata
);
492 memset(pfxdata
, 0, sizeof(*pfxdata
));
497 DBF_DEV_EVENT(DBF_ERR
, basedev
,
498 "PFX LRE unknown format 0x%x", format
);
502 pfxdata
->format
= format
;
503 pfxdata
->base_address
= basepriv
->ned
->unit_addr
;
504 pfxdata
->base_lss
= basepriv
->ned
->ID
;
505 pfxdata
->validity
.define_extent
= 1;
507 /* private uid is kept up to date, conf_data may be outdated */
508 if (startpriv
->uid
.type
!= UA_BASE_DEVICE
) {
509 pfxdata
->validity
.verify_base
= 1;
510 if (startpriv
->uid
.type
== UA_HYPER_PAV_ALIAS
)
511 pfxdata
->validity
.hyper_pav
= 1;
514 /* define extend data (mostly)*/
516 case DASD_ECKD_CCW_READ_HOME_ADDRESS
:
517 case DASD_ECKD_CCW_READ_RECORD_ZERO
:
518 case DASD_ECKD_CCW_READ
:
519 case DASD_ECKD_CCW_READ_MT
:
520 case DASD_ECKD_CCW_READ_CKD
:
521 case DASD_ECKD_CCW_READ_CKD_MT
:
522 case DASD_ECKD_CCW_READ_KD
:
523 case DASD_ECKD_CCW_READ_KD_MT
:
524 case DASD_ECKD_CCW_READ_COUNT
:
525 dedata
->mask
.perm
= 0x1;
526 dedata
->attributes
.operation
= basepriv
->attrib
.operation
;
528 case DASD_ECKD_CCW_READ_TRACK
:
529 case DASD_ECKD_CCW_READ_TRACK_DATA
:
530 dedata
->mask
.perm
= 0x1;
531 dedata
->attributes
.operation
= basepriv
->attrib
.operation
;
532 dedata
->blk_size
= 0;
534 case DASD_ECKD_CCW_WRITE
:
535 case DASD_ECKD_CCW_WRITE_MT
:
536 case DASD_ECKD_CCW_WRITE_KD
:
537 case DASD_ECKD_CCW_WRITE_KD_MT
:
538 dedata
->mask
.perm
= 0x02;
539 dedata
->attributes
.operation
= basepriv
->attrib
.operation
;
540 rc
= check_XRC_on_prefix(pfxdata
, basedev
);
542 case DASD_ECKD_CCW_WRITE_CKD
:
543 case DASD_ECKD_CCW_WRITE_CKD_MT
:
544 dedata
->attributes
.operation
= DASD_BYPASS_CACHE
;
545 rc
= check_XRC_on_prefix(pfxdata
, basedev
);
547 case DASD_ECKD_CCW_ERASE
:
548 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS
:
549 case DASD_ECKD_CCW_WRITE_RECORD_ZERO
:
550 dedata
->mask
.perm
= 0x3;
551 dedata
->mask
.auth
= 0x1;
552 dedata
->attributes
.operation
= DASD_BYPASS_CACHE
;
553 rc
= check_XRC_on_prefix(pfxdata
, basedev
);
555 case DASD_ECKD_CCW_WRITE_FULL_TRACK
:
556 dedata
->mask
.perm
= 0x03;
557 dedata
->attributes
.operation
= basepriv
->attrib
.operation
;
558 dedata
->blk_size
= 0;
560 case DASD_ECKD_CCW_WRITE_TRACK_DATA
:
561 dedata
->mask
.perm
= 0x02;
562 dedata
->attributes
.operation
= basepriv
->attrib
.operation
;
563 dedata
->blk_size
= blksize
;
564 rc
= check_XRC_on_prefix(pfxdata
, basedev
);
567 DBF_DEV_EVENT(DBF_ERR
, basedev
,
568 "PFX LRE unknown opcode 0x%x", cmd
);
573 dedata
->attributes
.mode
= 0x3; /* ECKD */
575 if ((basepriv
->rdc_data
.cu_type
== 0x2105 ||
576 basepriv
->rdc_data
.cu_type
== 0x2107 ||
577 basepriv
->rdc_data
.cu_type
== 0x1750)
578 && !(basepriv
->uses_cdl
&& trk
< 2))
579 dedata
->ga_extended
|= 0x40; /* Regular Data Format Mode */
581 heads
= basepriv
->rdc_data
.trk_per_cyl
;
582 begcyl
= trk
/ heads
;
583 beghead
= trk
% heads
;
584 endcyl
= totrk
/ heads
;
585 endhead
= totrk
% heads
;
587 /* check for sequential prestage - enhance cylinder range */
588 if (dedata
->attributes
.operation
== DASD_SEQ_PRESTAGE
||
589 dedata
->attributes
.operation
== DASD_SEQ_ACCESS
) {
591 if (endcyl
+ basepriv
->attrib
.nr_cyl
< basepriv
->real_cyl
)
592 endcyl
+= basepriv
->attrib
.nr_cyl
;
594 endcyl
= (basepriv
->real_cyl
- 1);
597 set_ch_t(&dedata
->beg_ext
, begcyl
, beghead
);
598 set_ch_t(&dedata
->end_ext
, endcyl
, endhead
);
601 fill_LRE_data(lredata
, trk
, rec_on_trk
, count
, cmd
,
602 basedev
, blksize
, tlf
);
608 static int prefix(struct ccw1
*ccw
, struct PFX_eckd_data
*pfxdata
,
609 unsigned int trk
, unsigned int totrk
, int cmd
,
610 struct dasd_device
*basedev
, struct dasd_device
*startdev
)
612 return prefix_LRE(ccw
, pfxdata
, trk
, totrk
, cmd
, basedev
, startdev
,
617 locate_record(struct ccw1
*ccw
, struct LO_eckd_data
*data
, unsigned int trk
,
618 unsigned int rec_on_trk
, int no_rec
, int cmd
,
619 struct dasd_device
* device
, int reclen
)
621 struct dasd_eckd_private
*private;
625 private = (struct dasd_eckd_private
*) device
->private;
627 DBF_DEV_EVENT(DBF_INFO
, device
,
628 "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d",
629 trk
, rec_on_trk
, no_rec
, cmd
, reclen
);
631 ccw
->cmd_code
= DASD_ECKD_CCW_LOCATE_RECORD
;
634 ccw
->cda
= (__u32
) __pa(data
);
636 memset(data
, 0, sizeof(struct LO_eckd_data
));
639 switch (private->rdc_data
.dev_type
) {
641 dn
= ceil_quot(reclen
+ 6, 232);
642 d
= 9 + ceil_quot(reclen
+ 6 * (dn
+ 1), 34);
643 sector
= (49 + (rec_on_trk
- 1) * (10 + d
)) / 8;
646 d
= 7 + ceil_quot(reclen
+ 12, 32);
647 sector
= (39 + (rec_on_trk
- 1) * (8 + d
)) / 7;
651 data
->sector
= sector
;
652 data
->count
= no_rec
;
654 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS
:
655 data
->operation
.orientation
= 0x3;
656 data
->operation
.operation
= 0x03;
658 case DASD_ECKD_CCW_READ_HOME_ADDRESS
:
659 data
->operation
.orientation
= 0x3;
660 data
->operation
.operation
= 0x16;
662 case DASD_ECKD_CCW_WRITE_RECORD_ZERO
:
663 data
->operation
.orientation
= 0x1;
664 data
->operation
.operation
= 0x03;
667 case DASD_ECKD_CCW_READ_RECORD_ZERO
:
668 data
->operation
.orientation
= 0x3;
669 data
->operation
.operation
= 0x16;
672 case DASD_ECKD_CCW_WRITE
:
673 case DASD_ECKD_CCW_WRITE_MT
:
674 case DASD_ECKD_CCW_WRITE_KD
:
675 case DASD_ECKD_CCW_WRITE_KD_MT
:
676 data
->auxiliary
.last_bytes_used
= 0x1;
677 data
->length
= reclen
;
678 data
->operation
.operation
= 0x01;
680 case DASD_ECKD_CCW_WRITE_CKD
:
681 case DASD_ECKD_CCW_WRITE_CKD_MT
:
682 data
->auxiliary
.last_bytes_used
= 0x1;
683 data
->length
= reclen
;
684 data
->operation
.operation
= 0x03;
686 case DASD_ECKD_CCW_READ
:
687 case DASD_ECKD_CCW_READ_MT
:
688 case DASD_ECKD_CCW_READ_KD
:
689 case DASD_ECKD_CCW_READ_KD_MT
:
690 data
->auxiliary
.last_bytes_used
= 0x1;
691 data
->length
= reclen
;
692 data
->operation
.operation
= 0x06;
694 case DASD_ECKD_CCW_READ_CKD
:
695 case DASD_ECKD_CCW_READ_CKD_MT
:
696 data
->auxiliary
.last_bytes_used
= 0x1;
697 data
->length
= reclen
;
698 data
->operation
.operation
= 0x16;
700 case DASD_ECKD_CCW_READ_COUNT
:
701 data
->operation
.operation
= 0x06;
703 case DASD_ECKD_CCW_ERASE
:
704 data
->length
= reclen
;
705 data
->auxiliary
.last_bytes_used
= 0x1;
706 data
->operation
.operation
= 0x0b;
709 DBF_DEV_EVENT(DBF_ERR
, device
, "unknown locate record "
712 set_ch_t(&data
->seek_addr
,
713 trk
/ private->rdc_data
.trk_per_cyl
,
714 trk
% private->rdc_data
.trk_per_cyl
);
715 data
->search_arg
.cyl
= data
->seek_addr
.cyl
;
716 data
->search_arg
.head
= data
->seek_addr
.head
;
717 data
->search_arg
.record
= rec_on_trk
;
721 * Returns 1 if the block is one of the special blocks that needs
722 * to get read/written with the KD variant of the command.
723 * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and
724 * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT.
725 * Luckily the KD variants differ only by one bit (0x08) from the
726 * normal variant. So don't wonder about code like:
727 * if (dasd_eckd_cdl_special(blk_per_trk, recid))
728 * ccw->cmd_code |= 0x8;
731 dasd_eckd_cdl_special(int blk_per_trk
, int recid
)
735 if (recid
< blk_per_trk
)
737 if (recid
< 2 * blk_per_trk
)
743 * Returns the record size for the special blocks of the cdl format.
744 * Only returns something useful if dasd_eckd_cdl_special is true
748 dasd_eckd_cdl_reclen(int recid
)
751 return sizes_trk0
[recid
];
754 /* create unique id from private structure. */
755 static void create_uid(struct dasd_eckd_private
*private)
758 struct dasd_uid
*uid
;
761 memset(uid
, 0, sizeof(struct dasd_uid
));
762 memcpy(uid
->vendor
, private->ned
->HDA_manufacturer
,
763 sizeof(uid
->vendor
) - 1);
764 EBCASC(uid
->vendor
, sizeof(uid
->vendor
) - 1);
765 memcpy(uid
->serial
, private->ned
->HDA_location
,
766 sizeof(uid
->serial
) - 1);
767 EBCASC(uid
->serial
, sizeof(uid
->serial
) - 1);
768 uid
->ssid
= private->gneq
->subsystemID
;
769 uid
->real_unit_addr
= private->ned
->unit_addr
;
771 uid
->type
= private->sneq
->sua_flags
;
772 if (uid
->type
== UA_BASE_PAV_ALIAS
)
773 uid
->base_unit_addr
= private->sneq
->base_unit_addr
;
775 uid
->type
= UA_BASE_DEVICE
;
777 if (private->vdsneq
) {
778 for (count
= 0; count
< 16; count
++) {
779 sprintf(uid
->vduit
+2*count
, "%02x",
780 private->vdsneq
->uit
[count
]);
786 * Generate device unique id that specifies the physical device.
788 static int dasd_eckd_generate_uid(struct dasd_device
*device
)
790 struct dasd_eckd_private
*private;
793 private = (struct dasd_eckd_private
*) device
->private;
796 if (!private->ned
|| !private->gneq
)
798 spin_lock_irqsave(get_ccwdev_lock(device
->cdev
), flags
);
800 spin_unlock_irqrestore(get_ccwdev_lock(device
->cdev
), flags
);
804 static int dasd_eckd_get_uid(struct dasd_device
*device
, struct dasd_uid
*uid
)
806 struct dasd_eckd_private
*private;
809 if (device
->private) {
810 private = (struct dasd_eckd_private
*)device
->private;
811 spin_lock_irqsave(get_ccwdev_lock(device
->cdev
), flags
);
813 spin_unlock_irqrestore(get_ccwdev_lock(device
->cdev
), flags
);
820 * compare device UID with data of a given dasd_eckd_private structure
823 static int dasd_eckd_compare_path_uid(struct dasd_device
*device
,
824 struct dasd_eckd_private
*private)
826 struct dasd_uid device_uid
;
829 dasd_eckd_get_uid(device
, &device_uid
);
831 return memcmp(&device_uid
, &private->uid
, sizeof(struct dasd_uid
));
834 static void dasd_eckd_fill_rcd_cqr(struct dasd_device
*device
,
835 struct dasd_ccw_req
*cqr
,
841 * buffer has to start with EBCDIC "V1.0" to show
842 * support for virtual device SNEQ
844 rcd_buffer
[0] = 0xE5;
845 rcd_buffer
[1] = 0xF1;
846 rcd_buffer
[2] = 0x4B;
847 rcd_buffer
[3] = 0xF0;
850 ccw
->cmd_code
= DASD_ECKD_CCW_RCD
;
852 ccw
->cda
= (__u32
)(addr_t
)rcd_buffer
;
853 ccw
->count
= DASD_ECKD_RCD_DATA_SIZE
;
854 cqr
->magic
= DASD_ECKD_MAGIC
;
856 cqr
->startdev
= device
;
857 cqr
->memdev
= device
;
859 cqr
->expires
= 10*HZ
;
862 cqr
->buildclk
= get_clock();
863 cqr
->status
= DASD_CQR_FILLED
;
864 set_bit(DASD_CQR_VERIFY_PATH
, &cqr
->flags
);
868 * Wakeup helper for read_conf
869 * if the cqr is not done and needs some error recovery
870 * the buffer has to be re-initialized with the EBCDIC "V1.0"
871 * to show support for virtual device SNEQ
873 static void read_conf_cb(struct dasd_ccw_req
*cqr
, void *data
)
878 if (cqr
->status
!= DASD_CQR_DONE
) {
880 rcd_buffer
= (__u8
*)((addr_t
) ccw
->cda
);
881 memset(rcd_buffer
, 0, sizeof(*rcd_buffer
));
883 rcd_buffer
[0] = 0xE5;
884 rcd_buffer
[1] = 0xF1;
885 rcd_buffer
[2] = 0x4B;
886 rcd_buffer
[3] = 0xF0;
888 dasd_wakeup_cb(cqr
, data
);
891 static int dasd_eckd_read_conf_immediately(struct dasd_device
*device
,
892 struct dasd_ccw_req
*cqr
,
899 * sanity check: scan for RCD command in extended SenseID data
900 * some devices do not support RCD
902 ciw
= ccw_device_get_ciw(device
->cdev
, CIW_TYPE_RCD
);
903 if (!ciw
|| ciw
->cmd
!= DASD_ECKD_CCW_RCD
)
906 dasd_eckd_fill_rcd_cqr(device
, cqr
, rcd_buffer
, lpm
);
907 clear_bit(DASD_CQR_FLAGS_USE_ERP
, &cqr
->flags
);
908 set_bit(DASD_CQR_ALLOW_SLOCK
, &cqr
->flags
);
910 cqr
->callback
= read_conf_cb
;
911 rc
= dasd_sleep_on_immediatly(cqr
);
915 static int dasd_eckd_read_conf_lpm(struct dasd_device
*device
,
917 int *rcd_buffer_size
, __u8 lpm
)
920 char *rcd_buf
= NULL
;
922 struct dasd_ccw_req
*cqr
;
925 * sanity check: scan for RCD command in extended SenseID data
926 * some devices do not support RCD
928 ciw
= ccw_device_get_ciw(device
->cdev
, CIW_TYPE_RCD
);
929 if (!ciw
|| ciw
->cmd
!= DASD_ECKD_CCW_RCD
) {
933 rcd_buf
= kzalloc(DASD_ECKD_RCD_DATA_SIZE
, GFP_KERNEL
| GFP_DMA
);
938 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1 /* RCD */,
939 0, /* use rcd_buf as data ara */
942 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
943 "Could not allocate RCD request");
947 dasd_eckd_fill_rcd_cqr(device
, cqr
, rcd_buf
, lpm
);
948 cqr
->callback
= read_conf_cb
;
949 ret
= dasd_sleep_on(cqr
);
951 * on success we update the user input parms
953 dasd_sfree_request(cqr
, cqr
->memdev
);
957 *rcd_buffer_size
= DASD_ECKD_RCD_DATA_SIZE
;
958 *rcd_buffer
= rcd_buf
;
963 *rcd_buffer_size
= 0;
967 static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private
*private)
970 struct dasd_sneq
*sneq
;
974 private->sneq
= NULL
;
975 private->vdsneq
= NULL
;
976 private->gneq
= NULL
;
977 count
= private->conf_len
/ sizeof(struct dasd_sneq
);
978 sneq
= (struct dasd_sneq
*)private->conf_data
;
979 for (i
= 0; i
< count
; ++i
) {
980 if (sneq
->flags
.identifier
== 1 && sneq
->format
== 1)
981 private->sneq
= sneq
;
982 else if (sneq
->flags
.identifier
== 1 && sneq
->format
== 4)
983 private->vdsneq
= (struct vd_sneq
*)sneq
;
984 else if (sneq
->flags
.identifier
== 2)
985 private->gneq
= (struct dasd_gneq
*)sneq
;
986 else if (sneq
->flags
.identifier
== 3 && sneq
->res1
== 1)
987 private->ned
= (struct dasd_ned
*)sneq
;
990 if (!private->ned
|| !private->gneq
) {
992 private->sneq
= NULL
;
993 private->vdsneq
= NULL
;
994 private->gneq
= NULL
;
1001 static unsigned char dasd_eckd_path_access(void *conf_data
, int conf_len
)
1003 struct dasd_gneq
*gneq
;
1004 int i
, count
, found
;
1006 count
= conf_len
/ sizeof(*gneq
);
1007 gneq
= (struct dasd_gneq
*)conf_data
;
1009 for (i
= 0; i
< count
; ++i
) {
1010 if (gneq
->flags
.identifier
== 2) {
1017 return ((char *)gneq
)[18] & 0x07;
1022 static int dasd_eckd_read_conf(struct dasd_device
*device
)
1025 int conf_len
, conf_data_saved
;
1028 struct dasd_eckd_private
*private, path_private
;
1029 struct dasd_path
*path_data
;
1030 struct dasd_uid
*uid
;
1031 char print_path_uid
[60], print_device_uid
[60];
1033 private = (struct dasd_eckd_private
*) device
->private;
1034 path_data
= &device
->path_data
;
1035 opm
= ccw_device_get_path_mask(device
->cdev
);
1036 conf_data_saved
= 0;
1037 /* get configuration data per operational path */
1038 for (lpm
= 0x80; lpm
; lpm
>>= 1) {
1041 rc
= dasd_eckd_read_conf_lpm(device
, &conf_data
,
1043 if (rc
&& rc
!= -EOPNOTSUPP
) { /* -EOPNOTSUPP is ok */
1044 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
,
1045 "Read configuration data returned "
1049 if (conf_data
== NULL
) {
1050 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
, "%s",
1051 "No configuration data "
1053 /* no further analysis possible */
1054 path_data
->opm
|= lpm
;
1055 continue; /* no error */
1057 /* save first valid configuration data */
1058 if (!conf_data_saved
) {
1059 kfree(private->conf_data
);
1060 private->conf_data
= conf_data
;
1061 private->conf_len
= conf_len
;
1062 if (dasd_eckd_identify_conf_parts(private)) {
1063 private->conf_data
= NULL
;
1064 private->conf_len
= 0;
1069 * build device UID that other path data
1070 * can be compared to it
1072 dasd_eckd_generate_uid(device
);
1075 path_private
.conf_data
= conf_data
;
1076 path_private
.conf_len
= DASD_ECKD_RCD_DATA_SIZE
;
1077 if (dasd_eckd_identify_conf_parts(
1079 path_private
.conf_data
= NULL
;
1080 path_private
.conf_len
= 0;
1085 if (dasd_eckd_compare_path_uid(
1086 device
, &path_private
)) {
1087 uid
= &path_private
.uid
;
1088 if (strlen(uid
->vduit
) > 0)
1089 snprintf(print_path_uid
,
1090 sizeof(print_path_uid
),
1091 "%s.%s.%04x.%02x.%s",
1092 uid
->vendor
, uid
->serial
,
1093 uid
->ssid
, uid
->real_unit_addr
,
1096 snprintf(print_path_uid
,
1097 sizeof(print_path_uid
),
1099 uid
->vendor
, uid
->serial
,
1101 uid
->real_unit_addr
);
1102 uid
= &private->uid
;
1103 if (strlen(uid
->vduit
) > 0)
1104 snprintf(print_device_uid
,
1105 sizeof(print_device_uid
),
1106 "%s.%s.%04x.%02x.%s",
1107 uid
->vendor
, uid
->serial
,
1108 uid
->ssid
, uid
->real_unit_addr
,
1111 snprintf(print_device_uid
,
1112 sizeof(print_device_uid
),
1114 uid
->vendor
, uid
->serial
,
1116 uid
->real_unit_addr
);
1117 dev_err(&device
->cdev
->dev
,
1118 "Not all channel paths lead to "
1119 "the same device, path %02X leads to "
1120 "device %s instead of %s\n", lpm
,
1121 print_path_uid
, print_device_uid
);
1125 path_private
.conf_data
= NULL
;
1126 path_private
.conf_len
= 0;
1128 switch (dasd_eckd_path_access(conf_data
, conf_len
)) {
1130 path_data
->npm
|= lpm
;
1133 path_data
->ppm
|= lpm
;
1136 path_data
->opm
|= lpm
;
1138 if (conf_data
!= private->conf_data
)
1145 static int verify_fcx_max_data(struct dasd_device
*device
, __u8 lpm
)
1147 struct dasd_eckd_private
*private;
1151 private = (struct dasd_eckd_private
*) device
->private;
1152 if (private->fcx_max_data
) {
1153 mdc
= ccw_device_get_mdc(device
->cdev
, lpm
);
1155 dev_warn(&device
->cdev
->dev
,
1156 "Detecting the maximum data size for zHPF "
1157 "requests failed (rc=%d) for a new path %x\n",
1161 fcx_max_data
= mdc
* FCX_MAX_DATA_FACTOR
;
1162 if (fcx_max_data
< private->fcx_max_data
) {
1163 dev_warn(&device
->cdev
->dev
,
1164 "The maximum data size for zHPF requests %u "
1165 "on a new path %x is below the active maximum "
1166 "%u\n", fcx_max_data
, lpm
,
1167 private->fcx_max_data
);
1174 static int rebuild_device_uid(struct dasd_device
*device
,
1175 struct path_verification_work_data
*data
)
1177 struct dasd_eckd_private
*private;
1178 struct dasd_path
*path_data
;
1183 private = (struct dasd_eckd_private
*) device
->private;
1184 path_data
= &device
->path_data
;
1185 opm
= device
->path_data
.opm
;
1187 for (lpm
= 0x80; lpm
; lpm
>>= 1) {
1190 memset(&data
->rcd_buffer
, 0, sizeof(data
->rcd_buffer
));
1191 memset(&data
->cqr
, 0, sizeof(data
->cqr
));
1192 data
->cqr
.cpaddr
= &data
->ccw
;
1193 rc
= dasd_eckd_read_conf_immediately(device
, &data
->cqr
,
1198 if (rc
== -EOPNOTSUPP
) /* -EOPNOTSUPP is ok */
1200 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
,
1201 "Read configuration data "
1202 "returned error %d", rc
);
1205 memcpy(private->conf_data
, data
->rcd_buffer
,
1206 DASD_ECKD_RCD_DATA_SIZE
);
1207 if (dasd_eckd_identify_conf_parts(private)) {
1209 } else /* first valid path is enough */
1214 rc
= dasd_eckd_generate_uid(device
);
1219 static void do_path_verification_work(struct work_struct
*work
)
1221 struct path_verification_work_data
*data
;
1222 struct dasd_device
*device
;
1223 struct dasd_eckd_private path_private
;
1224 struct dasd_uid
*uid
;
1225 __u8 path_rcd_buf
[DASD_ECKD_RCD_DATA_SIZE
];
1226 __u8 lpm
, opm
, npm
, ppm
, epm
;
1227 unsigned long flags
;
1231 data
= container_of(work
, struct path_verification_work_data
, worker
);
1232 device
= data
->device
;
1234 /* delay path verification until device was resumed */
1235 if (test_bit(DASD_FLAG_SUSPENDED
, &device
->flags
)) {
1236 schedule_work(work
);
1244 for (lpm
= 0x80; lpm
; lpm
>>= 1) {
1245 if (!(lpm
& data
->tbvpm
))
1247 memset(&data
->rcd_buffer
, 0, sizeof(data
->rcd_buffer
));
1248 memset(&data
->cqr
, 0, sizeof(data
->cqr
));
1249 data
->cqr
.cpaddr
= &data
->ccw
;
1250 rc
= dasd_eckd_read_conf_immediately(device
, &data
->cqr
,
1254 switch (dasd_eckd_path_access(data
->rcd_buffer
,
1255 DASD_ECKD_RCD_DATA_SIZE
)
1265 } else if (rc
== -EOPNOTSUPP
) {
1266 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
, "%s",
1267 "path verification: No configuration "
1270 } else if (rc
== -EAGAIN
) {
1271 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
, "%s",
1272 "path verification: device is stopped,"
1273 " try again later");
1276 dev_warn(&device
->cdev
->dev
,
1277 "Reading device feature codes failed "
1278 "(rc=%d) for new path %x\n", rc
, lpm
);
1281 if (verify_fcx_max_data(device
, lpm
)) {
1289 * save conf_data for comparison after
1290 * rebuild_device_uid may have changed
1293 memcpy(&path_rcd_buf
, data
->rcd_buffer
,
1294 DASD_ECKD_RCD_DATA_SIZE
);
1295 path_private
.conf_data
= (void *) &path_rcd_buf
;
1296 path_private
.conf_len
= DASD_ECKD_RCD_DATA_SIZE
;
1297 if (dasd_eckd_identify_conf_parts(&path_private
)) {
1298 path_private
.conf_data
= NULL
;
1299 path_private
.conf_len
= 0;
1304 * compare path UID with device UID only if at least
1305 * one valid path is left
1306 * in other case the device UID may have changed and
1307 * the first working path UID will be used as device UID
1309 if (device
->path_data
.opm
&&
1310 dasd_eckd_compare_path_uid(device
, &path_private
)) {
1312 * the comparison was not successful
1313 * rebuild the device UID with at least one
1314 * known path in case a z/VM hyperswap command
1315 * has changed the device
1317 * after this compare again
1319 * if either the rebuild or the recompare fails
1320 * the path can not be used
1322 if (rebuild_device_uid(device
, data
) ||
1323 dasd_eckd_compare_path_uid(
1324 device
, &path_private
)) {
1325 uid
= &path_private
.uid
;
1326 if (strlen(uid
->vduit
) > 0)
1327 snprintf(print_uid
, sizeof(print_uid
),
1328 "%s.%s.%04x.%02x.%s",
1329 uid
->vendor
, uid
->serial
,
1330 uid
->ssid
, uid
->real_unit_addr
,
1333 snprintf(print_uid
, sizeof(print_uid
),
1335 uid
->vendor
, uid
->serial
,
1337 uid
->real_unit_addr
);
1338 dev_err(&device
->cdev
->dev
,
1339 "The newly added channel path %02X "
1340 "will not be used because it leads "
1341 "to a different device %s\n",
1351 * There is a small chance that a path is lost again between
1352 * above path verification and the following modification of
1353 * the device opm mask. We could avoid that race here by using
1354 * yet another path mask, but we rather deal with this unlikely
1355 * situation in dasd_start_IO.
1357 spin_lock_irqsave(get_ccwdev_lock(device
->cdev
), flags
);
1358 if (!device
->path_data
.opm
&& opm
) {
1359 device
->path_data
.opm
= opm
;
1360 dasd_generic_path_operational(device
);
1362 device
->path_data
.opm
|= opm
;
1363 device
->path_data
.npm
|= npm
;
1364 device
->path_data
.ppm
|= ppm
;
1365 device
->path_data
.tbvpm
|= epm
;
1366 spin_unlock_irqrestore(get_ccwdev_lock(device
->cdev
), flags
);
1369 dasd_put_device(device
);
1371 mutex_unlock(&dasd_path_verification_mutex
);
1376 static int dasd_eckd_verify_path(struct dasd_device
*device
, __u8 lpm
)
1378 struct path_verification_work_data
*data
;
1380 data
= kmalloc(sizeof(*data
), GFP_ATOMIC
| GFP_DMA
);
1382 if (mutex_trylock(&dasd_path_verification_mutex
)) {
1383 data
= path_verification_worker
;
1388 memset(data
, 0, sizeof(*data
));
1391 INIT_WORK(&data
->worker
, do_path_verification_work
);
1392 dasd_get_device(device
);
1393 data
->device
= device
;
1395 schedule_work(&data
->worker
);
1399 static int dasd_eckd_read_features(struct dasd_device
*device
)
1401 struct dasd_psf_prssd_data
*prssdp
;
1402 struct dasd_rssd_features
*features
;
1403 struct dasd_ccw_req
*cqr
;
1406 struct dasd_eckd_private
*private;
1408 private = (struct dasd_eckd_private
*) device
->private;
1409 memset(&private->features
, 0, sizeof(struct dasd_rssd_features
));
1410 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1 /* PSF */ + 1 /* RSSD */,
1411 (sizeof(struct dasd_psf_prssd_data
) +
1412 sizeof(struct dasd_rssd_features
)),
1415 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
, "%s", "Could not "
1416 "allocate initialization request");
1417 return PTR_ERR(cqr
);
1419 cqr
->startdev
= device
;
1420 cqr
->memdev
= device
;
1423 cqr
->expires
= 10 * HZ
;
1425 /* Prepare for Read Subsystem Data */
1426 prssdp
= (struct dasd_psf_prssd_data
*) cqr
->data
;
1427 memset(prssdp
, 0, sizeof(struct dasd_psf_prssd_data
));
1428 prssdp
->order
= PSF_ORDER_PRSSD
;
1429 prssdp
->suborder
= 0x41; /* Read Feature Codes */
1430 /* all other bytes of prssdp must be zero */
1433 ccw
->cmd_code
= DASD_ECKD_CCW_PSF
;
1434 ccw
->count
= sizeof(struct dasd_psf_prssd_data
);
1435 ccw
->flags
|= CCW_FLAG_CC
;
1436 ccw
->cda
= (__u32
)(addr_t
) prssdp
;
1438 /* Read Subsystem Data - feature codes */
1439 features
= (struct dasd_rssd_features
*) (prssdp
+ 1);
1440 memset(features
, 0, sizeof(struct dasd_rssd_features
));
1443 ccw
->cmd_code
= DASD_ECKD_CCW_RSSD
;
1444 ccw
->count
= sizeof(struct dasd_rssd_features
);
1445 ccw
->cda
= (__u32
)(addr_t
) features
;
1447 cqr
->buildclk
= get_clock();
1448 cqr
->status
= DASD_CQR_FILLED
;
1449 rc
= dasd_sleep_on(cqr
);
1451 prssdp
= (struct dasd_psf_prssd_data
*) cqr
->data
;
1452 features
= (struct dasd_rssd_features
*) (prssdp
+ 1);
1453 memcpy(&private->features
, features
,
1454 sizeof(struct dasd_rssd_features
));
1456 dev_warn(&device
->cdev
->dev
, "Reading device feature codes"
1457 " failed with rc=%d\n", rc
);
1458 dasd_sfree_request(cqr
, cqr
->memdev
);
1464 * Build CP for Perform Subsystem Function - SSC.
1466 static struct dasd_ccw_req
*dasd_eckd_build_psf_ssc(struct dasd_device
*device
,
1469 struct dasd_ccw_req
*cqr
;
1470 struct dasd_psf_ssc_data
*psf_ssc_data
;
1473 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1 /* PSF */ ,
1474 sizeof(struct dasd_psf_ssc_data
),
1478 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
1479 "Could not allocate PSF-SSC request");
1482 psf_ssc_data
= (struct dasd_psf_ssc_data
*)cqr
->data
;
1483 psf_ssc_data
->order
= PSF_ORDER_SSC
;
1484 psf_ssc_data
->suborder
= 0xc0;
1486 psf_ssc_data
->suborder
|= 0x08;
1487 psf_ssc_data
->reserved
[0] = 0x88;
1490 ccw
->cmd_code
= DASD_ECKD_CCW_PSF
;
1491 ccw
->cda
= (__u32
)(addr_t
)psf_ssc_data
;
1494 cqr
->startdev
= device
;
1495 cqr
->memdev
= device
;
1498 cqr
->expires
= 10*HZ
;
1499 cqr
->buildclk
= get_clock();
1500 cqr
->status
= DASD_CQR_FILLED
;
1505 * Perform Subsystem Function.
1506 * It is necessary to trigger CIO for channel revalidation since this
1507 * call might change behaviour of DASD devices.
1510 dasd_eckd_psf_ssc(struct dasd_device
*device
, int enable_pav
,
1511 unsigned long flags
)
1513 struct dasd_ccw_req
*cqr
;
1516 cqr
= dasd_eckd_build_psf_ssc(device
, enable_pav
);
1518 return PTR_ERR(cqr
);
1521 * set flags e.g. turn on failfast, to prevent blocking
1522 * the calling function should handle failed requests
1524 cqr
->flags
|= flags
;
1526 rc
= dasd_sleep_on(cqr
);
1528 /* trigger CIO to reprobe devices */
1529 css_schedule_reprobe();
1530 else if (cqr
->intrc
== -EAGAIN
)
1533 dasd_sfree_request(cqr
, cqr
->memdev
);
1538 * Valide storage server of current device.
1540 static int dasd_eckd_validate_server(struct dasd_device
*device
,
1541 unsigned long flags
)
1544 struct dasd_eckd_private
*private;
1547 private = (struct dasd_eckd_private
*) device
->private;
1548 if (private->uid
.type
== UA_BASE_PAV_ALIAS
||
1549 private->uid
.type
== UA_HYPER_PAV_ALIAS
)
1551 if (dasd_nopav
|| MACHINE_IS_VM
)
1555 rc
= dasd_eckd_psf_ssc(device
, enable_pav
, flags
);
1557 /* may be requested feature is not available on server,
1558 * therefore just report error and go ahead */
1559 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
, "PSF-SSC for SSID %04x "
1560 "returned rc=%d", private->uid
.ssid
, rc
);
1565 * worker to do a validate server in case of a lost pathgroup
1567 static void dasd_eckd_do_validate_server(struct work_struct
*work
)
1569 struct dasd_device
*device
= container_of(work
, struct dasd_device
,
1571 if (dasd_eckd_validate_server(device
, DASD_CQR_FLAGS_FAILFAST
)
1573 /* schedule worker again if failed */
1574 schedule_work(&device
->kick_validate
);
1578 dasd_put_device(device
);
1581 static void dasd_eckd_kick_validate_server(struct dasd_device
*device
)
1583 dasd_get_device(device
);
1584 /* exit if device not online or in offline processing */
1585 if (test_bit(DASD_FLAG_OFFLINE
, &device
->flags
) ||
1586 device
->state
< DASD_STATE_ONLINE
) {
1587 dasd_put_device(device
);
1590 /* queue call to do_validate_server to the kernel event daemon. */
1591 schedule_work(&device
->kick_validate
);
1594 static u32
get_fcx_max_data(struct dasd_device
*device
)
1596 #if defined(CONFIG_64BIT)
1598 int fcx_in_css
, fcx_in_gneq
, fcx_in_features
;
1599 struct dasd_eckd_private
*private;
1603 /* is transport mode supported? */
1604 private = (struct dasd_eckd_private
*) device
->private;
1605 fcx_in_css
= css_general_characteristics
.fcx
;
1606 fcx_in_gneq
= private->gneq
->reserved2
[7] & 0x04;
1607 fcx_in_features
= private->features
.feature
[40] & 0x80;
1608 tpm
= fcx_in_css
&& fcx_in_gneq
&& fcx_in_features
;
1613 mdc
= ccw_device_get_mdc(device
->cdev
, 0);
1615 dev_warn(&device
->cdev
->dev
, "Detecting the maximum supported"
1616 " data size for zHPF requests failed\n");
1619 return mdc
* FCX_MAX_DATA_FACTOR
;
1626 * Check device characteristics.
1627 * If the device is accessible using ECKD discipline, the device is enabled.
1630 dasd_eckd_check_characteristics(struct dasd_device
*device
)
1632 struct dasd_eckd_private
*private;
1633 struct dasd_block
*block
;
1634 struct dasd_uid temp_uid
;
1637 unsigned long value
;
1639 /* setup work queue for validate server*/
1640 INIT_WORK(&device
->kick_validate
, dasd_eckd_do_validate_server
);
1642 if (!ccw_device_is_pathgroup(device
->cdev
)) {
1643 dev_warn(&device
->cdev
->dev
,
1644 "A channel path group could not be established\n");
1647 if (!ccw_device_is_multipath(device
->cdev
)) {
1648 dev_info(&device
->cdev
->dev
,
1649 "The DASD is not operating in multipath mode\n");
1651 private = (struct dasd_eckd_private
*) device
->private;
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 = (void *) 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 default timeout */
1676 device
->default_expires
= DASD_EXPIRES
;
1677 if (private->gneq
) {
1679 for (i
= 0; i
< private->gneq
->timeout
.value
; i
++)
1681 value
= value
* private->gneq
->timeout
.number
;
1682 /* do not accept useless values */
1683 if (value
!= 0 && value
<= DASD_EXPIRES_MAX
)
1684 device
->default_expires
= value
;
1687 dasd_eckd_get_uid(device
, &temp_uid
);
1688 if (temp_uid
.type
== UA_BASE_DEVICE
) {
1689 block
= dasd_alloc_block();
1690 if (IS_ERR(block
)) {
1691 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
, "%s",
1692 "could not allocate dasd "
1694 rc
= PTR_ERR(block
);
1697 device
->block
= block
;
1698 block
->base
= device
;
1701 /* register lcu with alias handling, enable PAV */
1702 rc
= dasd_alias_make_device_known_to_lcu(device
);
1706 dasd_eckd_validate_server(device
, 0);
1708 /* device may report different configuration data after LCU setup */
1709 rc
= dasd_eckd_read_conf(device
);
1713 /* Read Feature Codes */
1714 dasd_eckd_read_features(device
);
1716 /* Read Device Characteristics */
1717 rc
= dasd_generic_read_dev_chars(device
, DASD_ECKD_MAGIC
,
1718 &private->rdc_data
, 64);
1720 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
,
1721 "Read device characteristic failed, rc=%d", rc
);
1725 if ((device
->features
& DASD_FEATURE_USERAW
) &&
1726 !(private->rdc_data
.facilities
.RT_in_LR
)) {
1727 dev_err(&device
->cdev
->dev
, "The storage server does not "
1728 "support raw-track access\n");
1733 /* find the valid cylinder size */
1734 if (private->rdc_data
.no_cyl
== LV_COMPAT_CYL
&&
1735 private->rdc_data
.long_no_cyl
)
1736 private->real_cyl
= private->rdc_data
.long_no_cyl
;
1738 private->real_cyl
= private->rdc_data
.no_cyl
;
1740 private->fcx_max_data
= get_fcx_max_data(device
);
1742 readonly
= dasd_device_is_ro(device
);
1744 set_bit(DASD_FLAG_DEVICE_RO
, &device
->flags
);
1746 dev_info(&device
->cdev
->dev
, "New DASD %04X/%02X (CU %04X/%02X) "
1747 "with %d cylinders, %d heads, %d sectors%s\n",
1748 private->rdc_data
.dev_type
,
1749 private->rdc_data
.dev_model
,
1750 private->rdc_data
.cu_type
,
1751 private->rdc_data
.cu_model
.model
,
1753 private->rdc_data
.trk_per_cyl
,
1754 private->rdc_data
.sec_per_trk
,
1755 readonly
? ", read-only device" : "");
1759 dasd_alias_disconnect_device_from_lcu(device
);
1761 dasd_free_block(device
->block
);
1762 device
->block
= NULL
;
1764 kfree(private->conf_data
);
1765 kfree(device
->private);
1766 device
->private = NULL
;
1770 static void dasd_eckd_uncheck_device(struct dasd_device
*device
)
1772 struct dasd_eckd_private
*private;
1774 private = (struct dasd_eckd_private
*) device
->private;
1775 dasd_alias_disconnect_device_from_lcu(device
);
1776 private->ned
= NULL
;
1777 private->sneq
= NULL
;
1778 private->vdsneq
= NULL
;
1779 private->gneq
= NULL
;
1780 private->conf_len
= 0;
1781 kfree(private->conf_data
);
1782 private->conf_data
= NULL
;
1785 static struct dasd_ccw_req
*
1786 dasd_eckd_analysis_ccw(struct dasd_device
*device
)
1788 struct dasd_eckd_private
*private;
1789 struct eckd_count
*count_data
;
1790 struct LO_eckd_data
*LO_data
;
1791 struct dasd_ccw_req
*cqr
;
1793 int cplength
, datasize
;
1796 private = (struct dasd_eckd_private
*) device
->private;
1799 datasize
= sizeof(struct DE_eckd_data
) + 2*sizeof(struct LO_eckd_data
);
1800 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, cplength
, datasize
, device
);
1804 /* Define extent for the first 3 tracks. */
1805 define_extent(ccw
++, cqr
->data
, 0, 2,
1806 DASD_ECKD_CCW_READ_COUNT
, device
);
1807 LO_data
= cqr
->data
+ sizeof(struct DE_eckd_data
);
1808 /* Locate record for the first 4 records on track 0. */
1809 ccw
[-1].flags
|= CCW_FLAG_CC
;
1810 locate_record(ccw
++, LO_data
++, 0, 0, 4,
1811 DASD_ECKD_CCW_READ_COUNT
, device
, 0);
1813 count_data
= private->count_area
;
1814 for (i
= 0; i
< 4; i
++) {
1815 ccw
[-1].flags
|= CCW_FLAG_CC
;
1816 ccw
->cmd_code
= DASD_ECKD_CCW_READ_COUNT
;
1819 ccw
->cda
= (__u32
)(addr_t
) count_data
;
1824 /* Locate record for the first record on track 2. */
1825 ccw
[-1].flags
|= CCW_FLAG_CC
;
1826 locate_record(ccw
++, LO_data
++, 2, 0, 1,
1827 DASD_ECKD_CCW_READ_COUNT
, device
, 0);
1828 /* Read count ccw. */
1829 ccw
[-1].flags
|= CCW_FLAG_CC
;
1830 ccw
->cmd_code
= DASD_ECKD_CCW_READ_COUNT
;
1833 ccw
->cda
= (__u32
)(addr_t
) count_data
;
1836 cqr
->startdev
= device
;
1837 cqr
->memdev
= device
;
1839 cqr
->buildclk
= get_clock();
1840 cqr
->status
= DASD_CQR_FILLED
;
1844 /* differentiate between 'no record found' and any other error */
1845 static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req
*init_cqr
)
1848 if (init_cqr
->status
== DASD_CQR_DONE
)
1850 else if (init_cqr
->status
== DASD_CQR_NEED_ERP
||
1851 init_cqr
->status
== DASD_CQR_FAILED
) {
1852 sense
= dasd_get_sense(&init_cqr
->irb
);
1853 if (sense
&& (sense
[1] & SNS1_NO_REC_FOUND
))
1854 return INIT_CQR_UNFORMATTED
;
1856 return INIT_CQR_ERROR
;
1858 return INIT_CQR_ERROR
;
1862 * This is the callback function for the init_analysis cqr. It saves
1863 * the status of the initial analysis ccw before it frees it and kicks
1864 * the device to continue the startup sequence. This will call
1865 * dasd_eckd_do_analysis again (if the devices has not been marked
1866 * for deletion in the meantime).
1868 static void dasd_eckd_analysis_callback(struct dasd_ccw_req
*init_cqr
,
1871 struct dasd_eckd_private
*private;
1872 struct dasd_device
*device
;
1874 device
= init_cqr
->startdev
;
1875 private = (struct dasd_eckd_private
*) device
->private;
1876 private->init_cqr_status
= dasd_eckd_analysis_evaluation(init_cqr
);
1877 dasd_sfree_request(init_cqr
, device
);
1878 dasd_kick_device(device
);
1881 static int dasd_eckd_start_analysis(struct dasd_block
*block
)
1883 struct dasd_ccw_req
*init_cqr
;
1885 init_cqr
= dasd_eckd_analysis_ccw(block
->base
);
1886 if (IS_ERR(init_cqr
))
1887 return PTR_ERR(init_cqr
);
1888 init_cqr
->callback
= dasd_eckd_analysis_callback
;
1889 init_cqr
->callback_data
= NULL
;
1890 init_cqr
->expires
= 5*HZ
;
1891 /* first try without ERP, so we can later handle unformatted
1892 * devices as special case
1894 clear_bit(DASD_CQR_FLAGS_USE_ERP
, &init_cqr
->flags
);
1895 init_cqr
->retries
= 0;
1896 dasd_add_request_head(init_cqr
);
1900 static int dasd_eckd_end_analysis(struct dasd_block
*block
)
1902 struct dasd_device
*device
;
1903 struct dasd_eckd_private
*private;
1904 struct eckd_count
*count_area
;
1905 unsigned int sb
, blk_per_trk
;
1907 struct dasd_ccw_req
*init_cqr
;
1909 device
= block
->base
;
1910 private = (struct dasd_eckd_private
*) device
->private;
1911 status
= private->init_cqr_status
;
1912 private->init_cqr_status
= -1;
1913 if (status
== INIT_CQR_ERROR
) {
1914 /* try again, this time with full ERP */
1915 init_cqr
= dasd_eckd_analysis_ccw(device
);
1916 dasd_sleep_on(init_cqr
);
1917 status
= dasd_eckd_analysis_evaluation(init_cqr
);
1918 dasd_sfree_request(init_cqr
, device
);
1921 if (device
->features
& DASD_FEATURE_USERAW
) {
1922 block
->bp_block
= DASD_RAW_BLOCKSIZE
;
1923 blk_per_trk
= DASD_RAW_BLOCK_PER_TRACK
;
1924 block
->s2b_shift
= 3;
1928 if (status
== INIT_CQR_UNFORMATTED
) {
1929 dev_warn(&device
->cdev
->dev
, "The DASD is not formatted\n");
1930 return -EMEDIUMTYPE
;
1931 } else if (status
== INIT_CQR_ERROR
) {
1932 dev_err(&device
->cdev
->dev
,
1933 "Detecting the DASD disk layout failed because "
1934 "of an I/O error\n");
1938 private->uses_cdl
= 1;
1939 /* Check Track 0 for Compatible Disk Layout */
1941 for (i
= 0; i
< 3; i
++) {
1942 if (private->count_area
[i
].kl
!= 4 ||
1943 private->count_area
[i
].dl
!= dasd_eckd_cdl_reclen(i
) - 4) {
1944 private->uses_cdl
= 0;
1949 count_area
= &private->count_area
[4];
1951 if (private->uses_cdl
== 0) {
1952 for (i
= 0; i
< 5; i
++) {
1953 if ((private->count_area
[i
].kl
!= 0) ||
1954 (private->count_area
[i
].dl
!=
1955 private->count_area
[0].dl
))
1959 count_area
= &private->count_area
[0];
1961 if (private->count_area
[3].record
== 1)
1962 dev_warn(&device
->cdev
->dev
,
1963 "Track 0 has no records following the VTOC\n");
1966 if (count_area
!= NULL
&& count_area
->kl
== 0) {
1967 /* we found notthing violating our disk layout */
1968 if (dasd_check_blocksize(count_area
->dl
) == 0)
1969 block
->bp_block
= count_area
->dl
;
1971 if (block
->bp_block
== 0) {
1972 dev_warn(&device
->cdev
->dev
,
1973 "The disk layout of the DASD is not supported\n");
1974 return -EMEDIUMTYPE
;
1976 block
->s2b_shift
= 0; /* bits to shift 512 to get a block */
1977 for (sb
= 512; sb
< block
->bp_block
; sb
= sb
<< 1)
1980 blk_per_trk
= recs_per_track(&private->rdc_data
, 0, block
->bp_block
);
1983 block
->blocks
= (private->real_cyl
*
1984 private->rdc_data
.trk_per_cyl
*
1987 dev_info(&device
->cdev
->dev
,
1988 "DASD with %d KB/block, %d KB total size, %d KB/track, "
1989 "%s\n", (block
->bp_block
>> 10),
1990 ((private->real_cyl
*
1991 private->rdc_data
.trk_per_cyl
*
1992 blk_per_trk
* (block
->bp_block
>> 9)) >> 1),
1993 ((blk_per_trk
* block
->bp_block
) >> 10),
1995 "compatible disk layout" : "linux disk layout");
2000 static int dasd_eckd_do_analysis(struct dasd_block
*block
)
2002 struct dasd_eckd_private
*private;
2004 private = (struct dasd_eckd_private
*) block
->base
->private;
2005 if (private->init_cqr_status
< 0)
2006 return dasd_eckd_start_analysis(block
);
2008 return dasd_eckd_end_analysis(block
);
2011 static int dasd_eckd_ready_to_online(struct dasd_device
*device
)
2013 return dasd_alias_add_device(device
);
2016 static int dasd_eckd_online_to_ready(struct dasd_device
*device
)
2018 cancel_work_sync(&device
->reload_device
);
2019 cancel_work_sync(&device
->kick_validate
);
2020 return dasd_alias_remove_device(device
);
2024 dasd_eckd_fill_geometry(struct dasd_block
*block
, struct hd_geometry
*geo
)
2026 struct dasd_eckd_private
*private;
2028 private = (struct dasd_eckd_private
*) block
->base
->private;
2029 if (dasd_check_blocksize(block
->bp_block
) == 0) {
2030 geo
->sectors
= recs_per_track(&private->rdc_data
,
2031 0, block
->bp_block
);
2033 geo
->cylinders
= private->rdc_data
.no_cyl
;
2034 geo
->heads
= private->rdc_data
.trk_per_cyl
;
2038 static struct dasd_ccw_req
*
2039 dasd_eckd_format_device(struct dasd_device
* device
,
2040 struct format_data_t
* fdata
)
2042 struct dasd_eckd_private
*private;
2043 struct dasd_ccw_req
*fcp
;
2044 struct eckd_count
*ect
;
2048 struct ch_t address
;
2049 int cplength
, datasize
;
2054 private = (struct dasd_eckd_private
*) device
->private;
2055 rpt
= recs_per_track(&private->rdc_data
, 0, fdata
->blksize
);
2057 fdata
->start_unit
/ private->rdc_data
.trk_per_cyl
,
2058 fdata
->start_unit
% private->rdc_data
.trk_per_cyl
);
2060 /* Sanity checks. */
2061 if (fdata
->start_unit
>=
2062 (private->real_cyl
* private->rdc_data
.trk_per_cyl
)) {
2063 dev_warn(&device
->cdev
->dev
, "Start track number %d used in "
2064 "formatting is too big\n", fdata
->start_unit
);
2065 return ERR_PTR(-EINVAL
);
2067 if (fdata
->start_unit
> fdata
->stop_unit
) {
2068 dev_warn(&device
->cdev
->dev
, "Start track %d used in "
2069 "formatting exceeds end track\n", fdata
->start_unit
);
2070 return ERR_PTR(-EINVAL
);
2072 if (dasd_check_blocksize(fdata
->blksize
) != 0) {
2073 dev_warn(&device
->cdev
->dev
,
2074 "The DASD cannot be formatted with block size %d\n",
2076 return ERR_PTR(-EINVAL
);
2080 * fdata->intensity is a bit string that tells us what to do:
2081 * Bit 0: write record zero
2082 * Bit 1: write home address, currently not supported
2083 * Bit 2: invalidate tracks
2084 * Bit 3: use OS/390 compatible disk layout (cdl)
2085 * Bit 4: do not allow storage subsystem to modify record zero
2086 * Only some bit combinations do make sense.
2088 if (fdata
->intensity
& 0x10) {
2090 intensity
= fdata
->intensity
& ~0x10;
2093 intensity
= fdata
->intensity
;
2095 switch (intensity
) {
2096 case 0x00: /* Normal format */
2097 case 0x08: /* Normal format, use cdl. */
2099 datasize
= sizeof(struct DE_eckd_data
) +
2100 sizeof(struct LO_eckd_data
) +
2101 rpt
* sizeof(struct eckd_count
);
2103 case 0x01: /* Write record zero and format track. */
2104 case 0x09: /* Write record zero and format track, use cdl. */
2106 datasize
= sizeof(struct DE_eckd_data
) +
2107 sizeof(struct LO_eckd_data
) +
2108 sizeof(struct eckd_count
) +
2109 rpt
* sizeof(struct eckd_count
);
2111 case 0x04: /* Invalidate track. */
2112 case 0x0c: /* Invalidate track, use cdl. */
2114 datasize
= sizeof(struct DE_eckd_data
) +
2115 sizeof(struct LO_eckd_data
) +
2116 sizeof(struct eckd_count
);
2119 dev_warn(&device
->cdev
->dev
, "An I/O control call used "
2120 "incorrect flags 0x%x\n", fdata
->intensity
);
2121 return ERR_PTR(-EINVAL
);
2123 /* Allocate the format ccw request. */
2124 fcp
= dasd_smalloc_request(DASD_ECKD_MAGIC
, cplength
, datasize
, device
);
2131 switch (intensity
& ~0x08) {
2132 case 0x00: /* Normal format. */
2133 define_extent(ccw
++, (struct DE_eckd_data
*) data
,
2134 fdata
->start_unit
, fdata
->start_unit
,
2135 DASD_ECKD_CCW_WRITE_CKD
, device
);
2136 /* grant subsystem permission to format R0 */
2138 ((struct DE_eckd_data
*)data
)->ga_extended
|= 0x04;
2139 data
+= sizeof(struct DE_eckd_data
);
2140 ccw
[-1].flags
|= CCW_FLAG_CC
;
2141 locate_record(ccw
++, (struct LO_eckd_data
*) data
,
2142 fdata
->start_unit
, 0, rpt
,
2143 DASD_ECKD_CCW_WRITE_CKD
, device
,
2145 data
+= sizeof(struct LO_eckd_data
);
2147 case 0x01: /* Write record zero + format track. */
2148 define_extent(ccw
++, (struct DE_eckd_data
*) data
,
2149 fdata
->start_unit
, fdata
->start_unit
,
2150 DASD_ECKD_CCW_WRITE_RECORD_ZERO
,
2152 data
+= sizeof(struct DE_eckd_data
);
2153 ccw
[-1].flags
|= CCW_FLAG_CC
;
2154 locate_record(ccw
++, (struct LO_eckd_data
*) data
,
2155 fdata
->start_unit
, 0, rpt
+ 1,
2156 DASD_ECKD_CCW_WRITE_RECORD_ZERO
, device
,
2157 device
->block
->bp_block
);
2158 data
+= sizeof(struct LO_eckd_data
);
2160 case 0x04: /* Invalidate track. */
2161 define_extent(ccw
++, (struct DE_eckd_data
*) data
,
2162 fdata
->start_unit
, fdata
->start_unit
,
2163 DASD_ECKD_CCW_WRITE_CKD
, device
);
2164 data
+= sizeof(struct DE_eckd_data
);
2165 ccw
[-1].flags
|= CCW_FLAG_CC
;
2166 locate_record(ccw
++, (struct LO_eckd_data
*) data
,
2167 fdata
->start_unit
, 0, 1,
2168 DASD_ECKD_CCW_WRITE_CKD
, device
, 8);
2169 data
+= sizeof(struct LO_eckd_data
);
2172 if (intensity
& 0x01) { /* write record zero */
2173 ect
= (struct eckd_count
*) data
;
2174 data
+= sizeof(struct eckd_count
);
2175 ect
->cyl
= address
.cyl
;
2176 ect
->head
= address
.head
;
2180 ccw
[-1].flags
|= CCW_FLAG_CC
;
2181 ccw
->cmd_code
= DASD_ECKD_CCW_WRITE_RECORD_ZERO
;
2182 ccw
->flags
= CCW_FLAG_SLI
;
2184 ccw
->cda
= (__u32
)(addr_t
) ect
;
2187 if ((intensity
& ~0x08) & 0x04) { /* erase track */
2188 ect
= (struct eckd_count
*) data
;
2189 data
+= sizeof(struct eckd_count
);
2190 ect
->cyl
= address
.cyl
;
2191 ect
->head
= address
.head
;
2195 ccw
[-1].flags
|= CCW_FLAG_CC
;
2196 ccw
->cmd_code
= DASD_ECKD_CCW_WRITE_CKD
;
2197 ccw
->flags
= CCW_FLAG_SLI
;
2199 ccw
->cda
= (__u32
)(addr_t
) ect
;
2200 } else { /* write remaining records */
2201 for (i
= 0; i
< rpt
; i
++) {
2202 ect
= (struct eckd_count
*) data
;
2203 data
+= sizeof(struct eckd_count
);
2204 ect
->cyl
= address
.cyl
;
2205 ect
->head
= address
.head
;
2206 ect
->record
= i
+ 1;
2208 ect
->dl
= fdata
->blksize
;
2209 /* Check for special tracks 0-1 when formatting CDL */
2210 if ((intensity
& 0x08) &&
2211 fdata
->start_unit
== 0) {
2214 ect
->dl
= sizes_trk0
[i
] - 4;
2217 if ((intensity
& 0x08) &&
2218 fdata
->start_unit
== 1) {
2220 ect
->dl
= LABEL_SIZE
- 44;
2222 ccw
[-1].flags
|= CCW_FLAG_CC
;
2223 ccw
->cmd_code
= DASD_ECKD_CCW_WRITE_CKD
;
2224 ccw
->flags
= CCW_FLAG_SLI
;
2226 ccw
->cda
= (__u32
)(addr_t
) ect
;
2230 fcp
->startdev
= device
;
2231 fcp
->memdev
= device
;
2233 fcp
->buildclk
= get_clock();
2234 fcp
->status
= DASD_CQR_FILLED
;
2238 static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req
*cqr
)
2240 cqr
->status
= DASD_CQR_FILLED
;
2241 if (cqr
->block
&& (cqr
->startdev
!= cqr
->block
->base
)) {
2242 dasd_eckd_reset_ccw_to_base_io(cqr
);
2243 cqr
->startdev
= cqr
->block
->base
;
2244 cqr
->lpm
= cqr
->block
->base
->path_data
.opm
;
2248 static dasd_erp_fn_t
2249 dasd_eckd_erp_action(struct dasd_ccw_req
* cqr
)
2251 struct dasd_device
*device
= (struct dasd_device
*) cqr
->startdev
;
2252 struct ccw_device
*cdev
= device
->cdev
;
2254 switch (cdev
->id
.cu_type
) {
2259 return dasd_3990_erp_action
;
2263 return dasd_default_erp_action
;
2267 static dasd_erp_fn_t
2268 dasd_eckd_erp_postaction(struct dasd_ccw_req
* cqr
)
2270 return dasd_default_erp_postaction
;
2273 static void dasd_eckd_check_for_device_change(struct dasd_device
*device
,
2274 struct dasd_ccw_req
*cqr
,
2279 struct dasd_eckd_private
*private;
2281 private = (struct dasd_eckd_private
*) device
->private;
2282 /* first of all check for state change pending interrupt */
2283 mask
= DEV_STAT_ATTENTION
| DEV_STAT_DEV_END
| DEV_STAT_UNIT_EXCEP
;
2284 if ((scsw_dstat(&irb
->scsw
) & mask
) == mask
) {
2286 * for alias only, not in offline processing
2287 * and only if not suspended
2289 if (!device
->block
&& private->lcu
&&
2290 device
->state
== DASD_STATE_ONLINE
&&
2291 !test_bit(DASD_FLAG_OFFLINE
, &device
->flags
) &&
2292 !test_bit(DASD_FLAG_SUSPENDED
, &device
->flags
)) {
2294 * the state change could be caused by an alias
2295 * reassignment remove device from alias handling
2296 * to prevent new requests from being scheduled on
2297 * the wrong alias device
2299 dasd_alias_remove_device(device
);
2301 /* schedule worker to reload device */
2302 dasd_reload_device(device
);
2304 dasd_generic_handle_state_change(device
);
2308 sense
= dasd_get_sense(irb
);
2312 /* summary unit check */
2313 if ((sense
[27] & DASD_SENSE_BIT_0
) && (sense
[7] == 0x0D) &&
2314 (scsw_dstat(&irb
->scsw
) & DEV_STAT_UNIT_CHECK
)) {
2315 dasd_alias_handle_summary_unit_check(device
, irb
);
2319 /* service information message SIM */
2320 if (!cqr
&& !(sense
[27] & DASD_SENSE_BIT_0
) &&
2321 ((sense
[6] & DASD_SIM_SENSE
) == DASD_SIM_SENSE
)) {
2322 dasd_3990_erp_handle_sim(device
, sense
);
2326 /* loss of device reservation is handled via base devices only
2327 * as alias devices may be used with several bases
2329 if (device
->block
&& (sense
[27] & DASD_SENSE_BIT_0
) &&
2330 (sense
[7] == 0x3F) &&
2331 (scsw_dstat(&irb
->scsw
) & DEV_STAT_UNIT_CHECK
) &&
2332 test_bit(DASD_FLAG_IS_RESERVED
, &device
->flags
)) {
2333 if (device
->features
& DASD_FEATURE_FAILONSLCK
)
2334 set_bit(DASD_FLAG_LOCK_STOLEN
, &device
->flags
);
2335 clear_bit(DASD_FLAG_IS_RESERVED
, &device
->flags
);
2336 dev_err(&device
->cdev
->dev
,
2337 "The device reservation was lost\n");
2341 static struct dasd_ccw_req
*dasd_eckd_build_cp_cmd_single(
2342 struct dasd_device
*startdev
,
2343 struct dasd_block
*block
,
2344 struct request
*req
,
2349 unsigned int first_offs
,
2350 unsigned int last_offs
,
2351 unsigned int blk_per_trk
,
2352 unsigned int blksize
)
2354 struct dasd_eckd_private
*private;
2355 unsigned long *idaws
;
2356 struct LO_eckd_data
*LO_data
;
2357 struct dasd_ccw_req
*cqr
;
2359 struct req_iterator iter
;
2363 int count
, cidaw
, cplength
, datasize
;
2365 unsigned char cmd
, rcmd
;
2367 struct dasd_device
*basedev
;
2369 basedev
= block
->base
;
2370 private = (struct dasd_eckd_private
*) basedev
->private;
2371 if (rq_data_dir(req
) == READ
)
2372 cmd
= DASD_ECKD_CCW_READ_MT
;
2373 else if (rq_data_dir(req
) == WRITE
)
2374 cmd
= DASD_ECKD_CCW_WRITE_MT
;
2376 return ERR_PTR(-EINVAL
);
2378 /* Check struct bio and count the number of blocks for the request. */
2381 rq_for_each_segment(bv
, req
, iter
) {
2382 if (bv
->bv_len
& (blksize
- 1))
2383 /* Eckd can only do full blocks. */
2384 return ERR_PTR(-EINVAL
);
2385 count
+= bv
->bv_len
>> (block
->s2b_shift
+ 9);
2386 #if defined(CONFIG_64BIT)
2387 if (idal_is_needed (page_address(bv
->bv_page
), bv
->bv_len
))
2388 cidaw
+= bv
->bv_len
>> (block
->s2b_shift
+ 9);
2392 if (count
!= last_rec
- first_rec
+ 1)
2393 return ERR_PTR(-EINVAL
);
2395 /* use the prefix command if available */
2396 use_prefix
= private->features
.feature
[8] & 0x01;
2398 /* 1x prefix + number of blocks */
2399 cplength
= 2 + count
;
2400 /* 1x prefix + cidaws*sizeof(long) */
2401 datasize
= sizeof(struct PFX_eckd_data
) +
2402 sizeof(struct LO_eckd_data
) +
2403 cidaw
* sizeof(unsigned long);
2405 /* 1x define extent + 1x locate record + number of blocks */
2406 cplength
= 2 + count
;
2407 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */
2408 datasize
= sizeof(struct DE_eckd_data
) +
2409 sizeof(struct LO_eckd_data
) +
2410 cidaw
* sizeof(unsigned long);
2412 /* Find out the number of additional locate record ccws for cdl. */
2413 if (private->uses_cdl
&& first_rec
< 2*blk_per_trk
) {
2414 if (last_rec
>= 2*blk_per_trk
)
2415 count
= 2*blk_per_trk
- first_rec
;
2417 datasize
+= count
*sizeof(struct LO_eckd_data
);
2419 /* Allocate the ccw request. */
2420 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, cplength
, datasize
,
2425 /* First ccw is define extent or prefix. */
2427 if (prefix(ccw
++, cqr
->data
, first_trk
,
2428 last_trk
, cmd
, basedev
, startdev
) == -EAGAIN
) {
2429 /* Clock not in sync and XRC is enabled.
2432 dasd_sfree_request(cqr
, startdev
);
2433 return ERR_PTR(-EAGAIN
);
2435 idaws
= (unsigned long *) (cqr
->data
+
2436 sizeof(struct PFX_eckd_data
));
2438 if (define_extent(ccw
++, cqr
->data
, first_trk
,
2439 last_trk
, cmd
, basedev
) == -EAGAIN
) {
2440 /* Clock not in sync and XRC is enabled.
2443 dasd_sfree_request(cqr
, startdev
);
2444 return ERR_PTR(-EAGAIN
);
2446 idaws
= (unsigned long *) (cqr
->data
+
2447 sizeof(struct DE_eckd_data
));
2449 /* Build locate_record+read/write/ccws. */
2450 LO_data
= (struct LO_eckd_data
*) (idaws
+ cidaw
);
2452 if (private->uses_cdl
== 0 || recid
> 2*blk_per_trk
) {
2453 /* Only standard blocks so there is just one locate record. */
2454 ccw
[-1].flags
|= CCW_FLAG_CC
;
2455 locate_record(ccw
++, LO_data
++, first_trk
, first_offs
+ 1,
2456 last_rec
- recid
+ 1, cmd
, basedev
, blksize
);
2458 rq_for_each_segment(bv
, req
, iter
) {
2459 dst
= page_address(bv
->bv_page
) + bv
->bv_offset
;
2460 if (dasd_page_cache
) {
2461 char *copy
= kmem_cache_alloc(dasd_page_cache
,
2462 GFP_DMA
| __GFP_NOWARN
);
2463 if (copy
&& rq_data_dir(req
) == WRITE
)
2464 memcpy(copy
+ bv
->bv_offset
, dst
, bv
->bv_len
);
2466 dst
= copy
+ bv
->bv_offset
;
2468 for (off
= 0; off
< bv
->bv_len
; off
+= blksize
) {
2469 sector_t trkid
= recid
;
2470 unsigned int recoffs
= sector_div(trkid
, blk_per_trk
);
2473 /* Locate record for cdl special block ? */
2474 if (private->uses_cdl
&& recid
< 2*blk_per_trk
) {
2475 if (dasd_eckd_cdl_special(blk_per_trk
, recid
)){
2477 count
= dasd_eckd_cdl_reclen(recid
);
2478 if (count
< blksize
&&
2479 rq_data_dir(req
) == READ
)
2480 memset(dst
+ count
, 0xe5,
2483 ccw
[-1].flags
|= CCW_FLAG_CC
;
2484 locate_record(ccw
++, LO_data
++,
2486 1, rcmd
, basedev
, count
);
2488 /* Locate record for standard blocks ? */
2489 if (private->uses_cdl
&& recid
== 2*blk_per_trk
) {
2490 ccw
[-1].flags
|= CCW_FLAG_CC
;
2491 locate_record(ccw
++, LO_data
++,
2493 last_rec
- recid
+ 1,
2494 cmd
, basedev
, count
);
2496 /* Read/write ccw. */
2497 ccw
[-1].flags
|= CCW_FLAG_CC
;
2498 ccw
->cmd_code
= rcmd
;
2500 if (idal_is_needed(dst
, blksize
)) {
2501 ccw
->cda
= (__u32
)(addr_t
) idaws
;
2502 ccw
->flags
= CCW_FLAG_IDA
;
2503 idaws
= idal_create_words(idaws
, dst
, blksize
);
2505 ccw
->cda
= (__u32
)(addr_t
) dst
;
2513 if (blk_noretry_request(req
) ||
2514 block
->base
->features
& DASD_FEATURE_FAILFAST
)
2515 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
2516 cqr
->startdev
= startdev
;
2517 cqr
->memdev
= startdev
;
2519 cqr
->expires
= startdev
->default_expires
* HZ
; /* default 5 minutes */
2520 cqr
->lpm
= startdev
->path_data
.ppm
;
2522 cqr
->buildclk
= get_clock();
2523 cqr
->status
= DASD_CQR_FILLED
;
2527 static struct dasd_ccw_req
*dasd_eckd_build_cp_cmd_track(
2528 struct dasd_device
*startdev
,
2529 struct dasd_block
*block
,
2530 struct request
*req
,
2535 unsigned int first_offs
,
2536 unsigned int last_offs
,
2537 unsigned int blk_per_trk
,
2538 unsigned int blksize
)
2540 unsigned long *idaws
;
2541 struct dasd_ccw_req
*cqr
;
2543 struct req_iterator iter
;
2545 char *dst
, *idaw_dst
;
2546 unsigned int cidaw
, cplength
, datasize
;
2550 struct dasd_device
*basedev
;
2551 unsigned int trkcount
, count
, count_to_trk_end
;
2552 unsigned int idaw_len
, seg_len
, part_len
, len_to_track_end
;
2553 unsigned char new_track
, end_idaw
;
2555 unsigned int recoffs
;
2557 basedev
= block
->base
;
2558 if (rq_data_dir(req
) == READ
)
2559 cmd
= DASD_ECKD_CCW_READ_TRACK_DATA
;
2560 else if (rq_data_dir(req
) == WRITE
)
2561 cmd
= DASD_ECKD_CCW_WRITE_TRACK_DATA
;
2563 return ERR_PTR(-EINVAL
);
2565 /* Track based I/O needs IDAWs for each page, and not just for
2566 * 64 bit addresses. We need additional idals for pages
2567 * that get filled from two tracks, so we use the number
2568 * of records as upper limit.
2570 cidaw
= last_rec
- first_rec
+ 1;
2571 trkcount
= last_trk
- first_trk
+ 1;
2573 /* 1x prefix + one read/write ccw per track */
2574 cplength
= 1 + trkcount
;
2576 /* on 31-bit we need space for two 32 bit addresses per page
2577 * on 64-bit one 64 bit address
2579 datasize
= sizeof(struct PFX_eckd_data
) +
2580 cidaw
* sizeof(unsigned long long);
2582 /* Allocate the ccw request. */
2583 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, cplength
, datasize
,
2588 /* transfer length factor: how many bytes to read from the last track */
2589 if (first_trk
== last_trk
)
2590 tlf
= last_offs
- first_offs
+ 1;
2592 tlf
= last_offs
+ 1;
2595 if (prefix_LRE(ccw
++, cqr
->data
, first_trk
,
2596 last_trk
, cmd
, basedev
, startdev
,
2597 1 /* format */, first_offs
+ 1,
2600 /* Clock not in sync and XRC is enabled.
2603 dasd_sfree_request(cqr
, startdev
);
2604 return ERR_PTR(-EAGAIN
);
2608 * The translation of request into ccw programs must meet the
2609 * following conditions:
2610 * - all idaws but the first and the last must address full pages
2611 * (or 2K blocks on 31-bit)
2612 * - the scope of a ccw and it's idal ends with the track boundaries
2614 idaws
= (unsigned long *) (cqr
->data
+ sizeof(struct PFX_eckd_data
));
2618 len_to_track_end
= 0;
2621 rq_for_each_segment(bv
, req
, iter
) {
2622 dst
= page_address(bv
->bv_page
) + bv
->bv_offset
;
2623 seg_len
= bv
->bv_len
;
2627 recoffs
= sector_div(trkid
, blk_per_trk
);
2628 count_to_trk_end
= blk_per_trk
- recoffs
;
2629 count
= min((last_rec
- recid
+ 1),
2630 (sector_t
)count_to_trk_end
);
2631 len_to_track_end
= count
* blksize
;
2632 ccw
[-1].flags
|= CCW_FLAG_CC
;
2633 ccw
->cmd_code
= cmd
;
2634 ccw
->count
= len_to_track_end
;
2635 ccw
->cda
= (__u32
)(addr_t
)idaws
;
2636 ccw
->flags
= CCW_FLAG_IDA
;
2640 /* first idaw for a ccw may start anywhere */
2644 /* If we start a new idaw, we must make sure that it
2645 * starts on an IDA_BLOCK_SIZE boundary.
2646 * If we continue an idaw, we must make sure that the
2647 * current segment begins where the so far accumulated
2651 if (__pa(dst
) & (IDA_BLOCK_SIZE
-1)) {
2652 dasd_sfree_request(cqr
, startdev
);
2653 return ERR_PTR(-ERANGE
);
2657 if ((idaw_dst
+ idaw_len
) != dst
) {
2658 dasd_sfree_request(cqr
, startdev
);
2659 return ERR_PTR(-ERANGE
);
2661 part_len
= min(seg_len
, len_to_track_end
);
2662 seg_len
-= part_len
;
2664 idaw_len
+= part_len
;
2665 len_to_track_end
-= part_len
;
2666 /* collected memory area ends on an IDA_BLOCK border,
2668 * idal_create_words will handle cases where idaw_len
2669 * is larger then IDA_BLOCK_SIZE
2671 if (!(__pa(idaw_dst
+ idaw_len
) & (IDA_BLOCK_SIZE
-1)))
2673 /* We also need to end the idaw at track end */
2674 if (!len_to_track_end
) {
2679 idaws
= idal_create_words(idaws
, idaw_dst
,
2688 if (blk_noretry_request(req
) ||
2689 block
->base
->features
& DASD_FEATURE_FAILFAST
)
2690 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
2691 cqr
->startdev
= startdev
;
2692 cqr
->memdev
= startdev
;
2694 cqr
->expires
= startdev
->default_expires
* HZ
; /* default 5 minutes */
2695 cqr
->lpm
= startdev
->path_data
.ppm
;
2697 cqr
->buildclk
= get_clock();
2698 cqr
->status
= DASD_CQR_FILLED
;
2702 static int prepare_itcw(struct itcw
*itcw
,
2703 unsigned int trk
, unsigned int totrk
, int cmd
,
2704 struct dasd_device
*basedev
,
2705 struct dasd_device
*startdev
,
2706 unsigned int rec_on_trk
, int count
,
2707 unsigned int blksize
,
2708 unsigned int total_data_size
,
2710 unsigned int blk_per_trk
)
2712 struct PFX_eckd_data pfxdata
;
2713 struct dasd_eckd_private
*basepriv
, *startpriv
;
2714 struct DE_eckd_data
*dedata
;
2715 struct LRE_eckd_data
*lredata
;
2719 u16 heads
, beghead
, endhead
;
2727 /* setup prefix data */
2728 basepriv
= (struct dasd_eckd_private
*) basedev
->private;
2729 startpriv
= (struct dasd_eckd_private
*) startdev
->private;
2730 dedata
= &pfxdata
.define_extent
;
2731 lredata
= &pfxdata
.locate_record
;
2733 memset(&pfxdata
, 0, sizeof(pfxdata
));
2734 pfxdata
.format
= 1; /* PFX with LRE */
2735 pfxdata
.base_address
= basepriv
->ned
->unit_addr
;
2736 pfxdata
.base_lss
= basepriv
->ned
->ID
;
2737 pfxdata
.validity
.define_extent
= 1;
2739 /* private uid is kept up to date, conf_data may be outdated */
2740 if (startpriv
->uid
.type
!= UA_BASE_DEVICE
) {
2741 pfxdata
.validity
.verify_base
= 1;
2742 if (startpriv
->uid
.type
== UA_HYPER_PAV_ALIAS
)
2743 pfxdata
.validity
.hyper_pav
= 1;
2747 case DASD_ECKD_CCW_READ_TRACK_DATA
:
2748 dedata
->mask
.perm
= 0x1;
2749 dedata
->attributes
.operation
= basepriv
->attrib
.operation
;
2750 dedata
->blk_size
= blksize
;
2751 dedata
->ga_extended
|= 0x42;
2752 lredata
->operation
.orientation
= 0x0;
2753 lredata
->operation
.operation
= 0x0C;
2754 lredata
->auxiliary
.check_bytes
= 0x01;
2755 pfx_cmd
= DASD_ECKD_CCW_PFX_READ
;
2757 case DASD_ECKD_CCW_WRITE_TRACK_DATA
:
2758 dedata
->mask
.perm
= 0x02;
2759 dedata
->attributes
.operation
= basepriv
->attrib
.operation
;
2760 dedata
->blk_size
= blksize
;
2761 rc
= check_XRC_on_prefix(&pfxdata
, basedev
);
2762 dedata
->ga_extended
|= 0x42;
2763 lredata
->operation
.orientation
= 0x0;
2764 lredata
->operation
.operation
= 0x3F;
2765 lredata
->extended_operation
= 0x23;
2766 lredata
->auxiliary
.check_bytes
= 0x2;
2767 pfx_cmd
= DASD_ECKD_CCW_PFX
;
2770 DBF_DEV_EVENT(DBF_ERR
, basedev
,
2771 "prepare itcw, unknown opcode 0x%x", cmd
);
2778 dedata
->attributes
.mode
= 0x3; /* ECKD */
2780 heads
= basepriv
->rdc_data
.trk_per_cyl
;
2781 begcyl
= trk
/ heads
;
2782 beghead
= trk
% heads
;
2783 endcyl
= totrk
/ heads
;
2784 endhead
= totrk
% heads
;
2786 /* check for sequential prestage - enhance cylinder range */
2787 if (dedata
->attributes
.operation
== DASD_SEQ_PRESTAGE
||
2788 dedata
->attributes
.operation
== DASD_SEQ_ACCESS
) {
2790 if (endcyl
+ basepriv
->attrib
.nr_cyl
< basepriv
->real_cyl
)
2791 endcyl
+= basepriv
->attrib
.nr_cyl
;
2793 endcyl
= (basepriv
->real_cyl
- 1);
2796 set_ch_t(&dedata
->beg_ext
, begcyl
, beghead
);
2797 set_ch_t(&dedata
->end_ext
, endcyl
, endhead
);
2799 dedata
->ep_format
= 0x20; /* records per track is valid */
2800 dedata
->ep_rec_per_track
= blk_per_trk
;
2803 switch (basepriv
->rdc_data
.dev_type
) {
2805 dn
= ceil_quot(blksize
+ 6, 232);
2806 d
= 9 + ceil_quot(blksize
+ 6 * (dn
+ 1), 34);
2807 sector
= (49 + (rec_on_trk
- 1) * (10 + d
)) / 8;
2810 d
= 7 + ceil_quot(blksize
+ 12, 32);
2811 sector
= (39 + (rec_on_trk
- 1) * (8 + d
)) / 7;
2816 lredata
->auxiliary
.length_valid
= 1;
2817 lredata
->auxiliary
.length_scope
= 1;
2818 lredata
->auxiliary
.imbedded_ccw_valid
= 1;
2819 lredata
->length
= tlf
;
2820 lredata
->imbedded_ccw
= cmd
;
2821 lredata
->count
= count
;
2822 lredata
->sector
= sector
;
2823 set_ch_t(&lredata
->seek_addr
, begcyl
, beghead
);
2824 lredata
->search_arg
.cyl
= lredata
->seek_addr
.cyl
;
2825 lredata
->search_arg
.head
= lredata
->seek_addr
.head
;
2826 lredata
->search_arg
.record
= rec_on_trk
;
2828 dcw
= itcw_add_dcw(itcw
, pfx_cmd
, 0,
2829 &pfxdata
, sizeof(pfxdata
), total_data_size
);
2830 return IS_ERR(dcw
) ? PTR_ERR(dcw
) : 0;
2833 static struct dasd_ccw_req
*dasd_eckd_build_cp_tpm_track(
2834 struct dasd_device
*startdev
,
2835 struct dasd_block
*block
,
2836 struct request
*req
,
2841 unsigned int first_offs
,
2842 unsigned int last_offs
,
2843 unsigned int blk_per_trk
,
2844 unsigned int blksize
)
2846 struct dasd_ccw_req
*cqr
;
2847 struct req_iterator iter
;
2850 unsigned int trkcount
, ctidaw
;
2852 struct dasd_device
*basedev
;
2855 struct tidaw
*last_tidaw
= NULL
;
2859 unsigned int seg_len
, part_len
, len_to_track_end
;
2860 unsigned char new_track
;
2861 sector_t recid
, trkid
;
2863 unsigned int count
, count_to_trk_end
;
2866 basedev
= block
->base
;
2867 if (rq_data_dir(req
) == READ
) {
2868 cmd
= DASD_ECKD_CCW_READ_TRACK_DATA
;
2869 itcw_op
= ITCW_OP_READ
;
2870 } else if (rq_data_dir(req
) == WRITE
) {
2871 cmd
= DASD_ECKD_CCW_WRITE_TRACK_DATA
;
2872 itcw_op
= ITCW_OP_WRITE
;
2874 return ERR_PTR(-EINVAL
);
2876 /* trackbased I/O needs address all memory via TIDAWs,
2877 * not just for 64 bit addresses. This allows us to map
2878 * each segment directly to one tidaw.
2879 * In the case of write requests, additional tidaws may
2880 * be needed when a segment crosses a track boundary.
2882 trkcount
= last_trk
- first_trk
+ 1;
2884 rq_for_each_segment(bv
, req
, iter
) {
2887 if (rq_data_dir(req
) == WRITE
)
2888 ctidaw
+= (last_trk
- first_trk
);
2890 /* Allocate the ccw request. */
2891 itcw_size
= itcw_calc_size(0, ctidaw
, 0);
2892 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 0, itcw_size
, startdev
);
2896 /* transfer length factor: how many bytes to read from the last track */
2897 if (first_trk
== last_trk
)
2898 tlf
= last_offs
- first_offs
+ 1;
2900 tlf
= last_offs
+ 1;
2903 itcw
= itcw_init(cqr
->data
, itcw_size
, itcw_op
, 0, ctidaw
, 0);
2908 cqr
->cpaddr
= itcw_get_tcw(itcw
);
2909 if (prepare_itcw(itcw
, first_trk
, last_trk
,
2910 cmd
, basedev
, startdev
,
2913 (last_rec
- first_rec
+ 1) * blksize
,
2914 tlf
, blk_per_trk
) == -EAGAIN
) {
2915 /* Clock not in sync and XRC is enabled.
2921 len_to_track_end
= 0;
2923 * A tidaw can address 4k of memory, but must not cross page boundaries
2924 * We can let the block layer handle this by setting
2925 * blk_queue_segment_boundary to page boundaries and
2926 * blk_max_segment_size to page size when setting up the request queue.
2927 * For write requests, a TIDAW must not cross track boundaries, because
2928 * we have to set the CBC flag on the last tidaw for each track.
2930 if (rq_data_dir(req
) == WRITE
) {
2933 rq_for_each_segment(bv
, req
, iter
) {
2934 dst
= page_address(bv
->bv_page
) + bv
->bv_offset
;
2935 seg_len
= bv
->bv_len
;
2939 offs
= sector_div(trkid
, blk_per_trk
);
2940 count_to_trk_end
= blk_per_trk
- offs
;
2941 count
= min((last_rec
- recid
+ 1),
2942 (sector_t
)count_to_trk_end
);
2943 len_to_track_end
= count
* blksize
;
2947 part_len
= min(seg_len
, len_to_track_end
);
2948 seg_len
-= part_len
;
2949 len_to_track_end
-= part_len
;
2950 /* We need to end the tidaw at track end */
2951 if (!len_to_track_end
) {
2953 tidaw_flags
= TIDAW_FLAGS_INSERT_CBC
;
2956 last_tidaw
= itcw_add_tidaw(itcw
, tidaw_flags
,
2958 if (IS_ERR(last_tidaw
)) {
2966 rq_for_each_segment(bv
, req
, iter
) {
2967 dst
= page_address(bv
->bv_page
) + bv
->bv_offset
;
2968 last_tidaw
= itcw_add_tidaw(itcw
, 0x00,
2970 if (IS_ERR(last_tidaw
)) {
2976 last_tidaw
->flags
|= TIDAW_FLAGS_LAST
;
2977 last_tidaw
->flags
&= ~TIDAW_FLAGS_INSERT_CBC
;
2978 itcw_finalize(itcw
);
2980 if (blk_noretry_request(req
) ||
2981 block
->base
->features
& DASD_FEATURE_FAILFAST
)
2982 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
2984 cqr
->startdev
= startdev
;
2985 cqr
->memdev
= startdev
;
2987 cqr
->expires
= startdev
->default_expires
* HZ
; /* default 5 minutes */
2988 cqr
->lpm
= startdev
->path_data
.ppm
;
2990 cqr
->buildclk
= get_clock();
2991 cqr
->status
= DASD_CQR_FILLED
;
2994 dasd_sfree_request(cqr
, startdev
);
2995 return ERR_PTR(ret
);
2998 static struct dasd_ccw_req
*dasd_eckd_build_cp(struct dasd_device
*startdev
,
2999 struct dasd_block
*block
,
3000 struct request
*req
)
3005 struct dasd_eckd_private
*private;
3006 struct dasd_device
*basedev
;
3007 sector_t first_rec
, last_rec
;
3008 sector_t first_trk
, last_trk
;
3009 unsigned int first_offs
, last_offs
;
3010 unsigned int blk_per_trk
, blksize
;
3012 unsigned int data_size
;
3013 struct dasd_ccw_req
*cqr
;
3015 basedev
= block
->base
;
3016 private = (struct dasd_eckd_private
*) basedev
->private;
3018 /* Calculate number of blocks/records per track. */
3019 blksize
= block
->bp_block
;
3020 blk_per_trk
= recs_per_track(&private->rdc_data
, 0, blksize
);
3021 if (blk_per_trk
== 0)
3022 return ERR_PTR(-EINVAL
);
3023 /* Calculate record id of first and last block. */
3024 first_rec
= first_trk
= blk_rq_pos(req
) >> block
->s2b_shift
;
3025 first_offs
= sector_div(first_trk
, blk_per_trk
);
3026 last_rec
= last_trk
=
3027 (blk_rq_pos(req
) + blk_rq_sectors(req
) - 1) >> block
->s2b_shift
;
3028 last_offs
= sector_div(last_trk
, blk_per_trk
);
3029 cdlspecial
= (private->uses_cdl
&& first_rec
< 2*blk_per_trk
);
3031 fcx_multitrack
= private->features
.feature
[40] & 0x20;
3032 data_size
= blk_rq_bytes(req
);
3033 /* tpm write request add CBC data on each track boundary */
3034 if (rq_data_dir(req
) == WRITE
)
3035 data_size
+= (last_trk
- first_trk
) * 4;
3037 /* is read track data and write track data in command mode supported? */
3038 cmdrtd
= private->features
.feature
[9] & 0x20;
3039 cmdwtd
= private->features
.feature
[12] & 0x40;
3040 use_prefix
= private->features
.feature
[8] & 0x01;
3043 if (cdlspecial
|| dasd_page_cache
) {
3044 /* do nothing, just fall through to the cmd mode single case */
3045 } else if ((data_size
<= private->fcx_max_data
)
3046 && (fcx_multitrack
|| (first_trk
== last_trk
))) {
3047 cqr
= dasd_eckd_build_cp_tpm_track(startdev
, block
, req
,
3048 first_rec
, last_rec
,
3049 first_trk
, last_trk
,
3050 first_offs
, last_offs
,
3051 blk_per_trk
, blksize
);
3052 if (IS_ERR(cqr
) && (PTR_ERR(cqr
) != -EAGAIN
) &&
3053 (PTR_ERR(cqr
) != -ENOMEM
))
3055 } else if (use_prefix
&&
3056 (((rq_data_dir(req
) == READ
) && cmdrtd
) ||
3057 ((rq_data_dir(req
) == WRITE
) && cmdwtd
))) {
3058 cqr
= dasd_eckd_build_cp_cmd_track(startdev
, block
, req
,
3059 first_rec
, last_rec
,
3060 first_trk
, last_trk
,
3061 first_offs
, last_offs
,
3062 blk_per_trk
, blksize
);
3063 if (IS_ERR(cqr
) && (PTR_ERR(cqr
) != -EAGAIN
) &&
3064 (PTR_ERR(cqr
) != -ENOMEM
))
3068 cqr
= dasd_eckd_build_cp_cmd_single(startdev
, block
, req
,
3069 first_rec
, last_rec
,
3070 first_trk
, last_trk
,
3071 first_offs
, last_offs
,
3072 blk_per_trk
, blksize
);
3076 static struct dasd_ccw_req
*dasd_raw_build_cp(struct dasd_device
*startdev
,
3077 struct dasd_block
*block
,
3078 struct request
*req
)
3080 unsigned long *idaws
;
3081 struct dasd_device
*basedev
;
3082 struct dasd_ccw_req
*cqr
;
3084 struct req_iterator iter
;
3088 unsigned int trkcount
;
3089 unsigned int seg_len
, len_to_track_end
;
3090 unsigned int first_offs
;
3091 unsigned int cidaw
, cplength
, datasize
;
3092 sector_t first_trk
, last_trk
;
3093 unsigned int pfx_datasize
;
3096 * raw track access needs to be mutiple of 64k and on 64k boundary
3098 if ((blk_rq_pos(req
) % DASD_RAW_SECTORS_PER_TRACK
) != 0) {
3099 cqr
= ERR_PTR(-EINVAL
);
3102 if (((blk_rq_pos(req
) + blk_rq_sectors(req
)) %
3103 DASD_RAW_SECTORS_PER_TRACK
) != 0) {
3104 cqr
= ERR_PTR(-EINVAL
);
3108 first_trk
= blk_rq_pos(req
) / DASD_RAW_SECTORS_PER_TRACK
;
3109 last_trk
= (blk_rq_pos(req
) + blk_rq_sectors(req
) - 1) /
3110 DASD_RAW_SECTORS_PER_TRACK
;
3111 trkcount
= last_trk
- first_trk
+ 1;
3113 basedev
= block
->base
;
3115 if (rq_data_dir(req
) == READ
)
3116 cmd
= DASD_ECKD_CCW_READ_TRACK
;
3117 else if (rq_data_dir(req
) == WRITE
)
3118 cmd
= DASD_ECKD_CCW_WRITE_FULL_TRACK
;
3120 cqr
= ERR_PTR(-EINVAL
);
3125 * Raw track based I/O needs IDAWs for each page,
3126 * and not just for 64 bit addresses.
3128 cidaw
= trkcount
* DASD_RAW_BLOCK_PER_TRACK
;
3130 /* 1x prefix + one read/write ccw per track */
3131 cplength
= 1 + trkcount
;
3134 * struct PFX_eckd_data has up to 2 byte as extended parameter
3135 * this is needed for write full track and has to be mentioned
3137 * add 8 instead of 2 to keep 8 byte boundary
3139 pfx_datasize
= sizeof(struct PFX_eckd_data
) + 8;
3141 datasize
= pfx_datasize
+ cidaw
* sizeof(unsigned long long);
3143 /* Allocate the ccw request. */
3144 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, cplength
,
3145 datasize
, startdev
);
3150 if (prefix_LRE(ccw
++, cqr
->data
, first_trk
, last_trk
, cmd
,
3151 basedev
, startdev
, 1 /* format */, first_offs
+ 1,
3152 trkcount
, 0, 0) == -EAGAIN
) {
3153 /* Clock not in sync and XRC is enabled.
3156 dasd_sfree_request(cqr
, startdev
);
3157 cqr
= ERR_PTR(-EAGAIN
);
3161 idaws
= (unsigned long *)(cqr
->data
+ pfx_datasize
);
3163 len_to_track_end
= 0;
3165 rq_for_each_segment(bv
, req
, iter
) {
3166 dst
= page_address(bv
->bv_page
) + bv
->bv_offset
;
3167 seg_len
= bv
->bv_len
;
3168 if (!len_to_track_end
) {
3169 ccw
[-1].flags
|= CCW_FLAG_CC
;
3170 ccw
->cmd_code
= cmd
;
3171 /* maximum 3390 track size */
3173 /* 64k map to one track */
3174 len_to_track_end
= 65536;
3175 ccw
->cda
= (__u32
)(addr_t
)idaws
;
3176 ccw
->flags
|= CCW_FLAG_IDA
;
3177 ccw
->flags
|= CCW_FLAG_SLI
;
3180 len_to_track_end
-= seg_len
;
3181 idaws
= idal_create_words(idaws
, dst
, seg_len
);
3184 if (blk_noretry_request(req
) ||
3185 block
->base
->features
& DASD_FEATURE_FAILFAST
)
3186 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
3187 cqr
->startdev
= startdev
;
3188 cqr
->memdev
= startdev
;
3190 cqr
->expires
= startdev
->default_expires
* HZ
;
3191 cqr
->lpm
= startdev
->path_data
.ppm
;
3193 cqr
->buildclk
= get_clock();
3194 cqr
->status
= DASD_CQR_FILLED
;
3196 if (IS_ERR(cqr
) && PTR_ERR(cqr
) != -EAGAIN
)
3204 dasd_eckd_free_cp(struct dasd_ccw_req
*cqr
, struct request
*req
)
3206 struct dasd_eckd_private
*private;
3208 struct req_iterator iter
;
3211 unsigned int blksize
, blk_per_trk
, off
;
3215 if (!dasd_page_cache
)
3217 private = (struct dasd_eckd_private
*) cqr
->block
->base
->private;
3218 blksize
= cqr
->block
->bp_block
;
3219 blk_per_trk
= recs_per_track(&private->rdc_data
, 0, blksize
);
3220 recid
= blk_rq_pos(req
) >> cqr
->block
->s2b_shift
;
3222 /* Skip over define extent & locate record. */
3224 if (private->uses_cdl
== 0 || recid
> 2*blk_per_trk
)
3226 rq_for_each_segment(bv
, req
, iter
) {
3227 dst
= page_address(bv
->bv_page
) + bv
->bv_offset
;
3228 for (off
= 0; off
< bv
->bv_len
; off
+= blksize
) {
3229 /* Skip locate record. */
3230 if (private->uses_cdl
&& recid
<= 2*blk_per_trk
)
3233 if (ccw
->flags
& CCW_FLAG_IDA
)
3234 cda
= *((char **)((addr_t
) ccw
->cda
));
3236 cda
= (char *)((addr_t
) ccw
->cda
);
3238 if (rq_data_dir(req
) == READ
)
3239 memcpy(dst
, cda
, bv
->bv_len
);
3240 kmem_cache_free(dasd_page_cache
,
3241 (void *)((addr_t
)cda
& PAGE_MASK
));
3250 status
= cqr
->status
== DASD_CQR_DONE
;
3251 dasd_sfree_request(cqr
, cqr
->memdev
);
3256 * Modify ccw/tcw in cqr so it can be started on a base device.
3258 * Note that this is not enough to restart the cqr!
3259 * Either reset cqr->startdev as well (summary unit check handling)
3260 * or restart via separate cqr (as in ERP handling).
3262 void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req
*cqr
)
3265 struct PFX_eckd_data
*pfxdata
;
3270 if (cqr
->cpmode
== 1) {
3272 tccb
= tcw_get_tccb(tcw
);
3273 dcw
= (struct dcw
*)&tccb
->tca
[0];
3274 pfxdata
= (struct PFX_eckd_data
*)&dcw
->cd
[0];
3275 pfxdata
->validity
.verify_base
= 0;
3276 pfxdata
->validity
.hyper_pav
= 0;
3279 pfxdata
= cqr
->data
;
3280 if (ccw
->cmd_code
== DASD_ECKD_CCW_PFX
) {
3281 pfxdata
->validity
.verify_base
= 0;
3282 pfxdata
->validity
.hyper_pav
= 0;
3287 #define DASD_ECKD_CHANQ_MAX_SIZE 4
3289 static struct dasd_ccw_req
*dasd_eckd_build_alias_cp(struct dasd_device
*base
,
3290 struct dasd_block
*block
,
3291 struct request
*req
)
3293 struct dasd_eckd_private
*private;
3294 struct dasd_device
*startdev
;
3295 unsigned long flags
;
3296 struct dasd_ccw_req
*cqr
;
3298 startdev
= dasd_alias_get_start_dev(base
);
3301 private = (struct dasd_eckd_private
*) startdev
->private;
3302 if (private->count
>= DASD_ECKD_CHANQ_MAX_SIZE
)
3303 return ERR_PTR(-EBUSY
);
3305 spin_lock_irqsave(get_ccwdev_lock(startdev
->cdev
), flags
);
3307 if ((base
->features
& DASD_FEATURE_USERAW
))
3308 cqr
= dasd_raw_build_cp(startdev
, block
, req
);
3310 cqr
= dasd_eckd_build_cp(startdev
, block
, req
);
3313 spin_unlock_irqrestore(get_ccwdev_lock(startdev
->cdev
), flags
);
3317 static int dasd_eckd_free_alias_cp(struct dasd_ccw_req
*cqr
,
3318 struct request
*req
)
3320 struct dasd_eckd_private
*private;
3321 unsigned long flags
;
3323 spin_lock_irqsave(get_ccwdev_lock(cqr
->memdev
->cdev
), flags
);
3324 private = (struct dasd_eckd_private
*) cqr
->memdev
->private;
3326 spin_unlock_irqrestore(get_ccwdev_lock(cqr
->memdev
->cdev
), flags
);
3327 return dasd_eckd_free_cp(cqr
, req
);
3331 dasd_eckd_fill_info(struct dasd_device
* device
,
3332 struct dasd_information2_t
* info
)
3334 struct dasd_eckd_private
*private;
3336 private = (struct dasd_eckd_private
*) device
->private;
3337 info
->label_block
= 2;
3338 info
->FBA_layout
= private->uses_cdl
? 0 : 1;
3339 info
->format
= private->uses_cdl
? DASD_FORMAT_CDL
: DASD_FORMAT_LDL
;
3340 info
->characteristics_size
= sizeof(struct dasd_eckd_characteristics
);
3341 memcpy(info
->characteristics
, &private->rdc_data
,
3342 sizeof(struct dasd_eckd_characteristics
));
3343 info
->confdata_size
= min((unsigned long)private->conf_len
,
3344 sizeof(info
->configuration_data
));
3345 memcpy(info
->configuration_data
, private->conf_data
,
3346 info
->confdata_size
);
3351 * SECTION: ioctl functions for eckd devices.
3355 * Release device ioctl.
3356 * Buils a channel programm to releases a prior reserved
3357 * (see dasd_eckd_reserve) device.
3360 dasd_eckd_release(struct dasd_device
*device
)
3362 struct dasd_ccw_req
*cqr
;
3367 if (!capable(CAP_SYS_ADMIN
))
3371 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1, 32, device
);
3373 mutex_lock(&dasd_reserve_mutex
);
3375 cqr
= &dasd_reserve_req
->cqr
;
3376 memset(cqr
, 0, sizeof(*cqr
));
3377 memset(&dasd_reserve_req
->ccw
, 0,
3378 sizeof(dasd_reserve_req
->ccw
));
3379 cqr
->cpaddr
= &dasd_reserve_req
->ccw
;
3380 cqr
->data
= &dasd_reserve_req
->data
;
3381 cqr
->magic
= DASD_ECKD_MAGIC
;
3384 ccw
->cmd_code
= DASD_ECKD_CCW_RELEASE
;
3385 ccw
->flags
|= CCW_FLAG_SLI
;
3387 ccw
->cda
= (__u32
)(addr_t
) cqr
->data
;
3388 cqr
->startdev
= device
;
3389 cqr
->memdev
= device
;
3390 clear_bit(DASD_CQR_FLAGS_USE_ERP
, &cqr
->flags
);
3391 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
3392 cqr
->retries
= 2; /* set retry counter to enable basic ERP */
3393 cqr
->expires
= 2 * HZ
;
3394 cqr
->buildclk
= get_clock();
3395 cqr
->status
= DASD_CQR_FILLED
;
3397 rc
= dasd_sleep_on_immediatly(cqr
);
3399 clear_bit(DASD_FLAG_IS_RESERVED
, &device
->flags
);
3402 mutex_unlock(&dasd_reserve_mutex
);
3404 dasd_sfree_request(cqr
, cqr
->memdev
);
3409 * Reserve device ioctl.
3410 * Options are set to 'synchronous wait for interrupt' and
3411 * 'timeout the request'. This leads to a terminate IO if
3412 * the interrupt is outstanding for a certain time.
3415 dasd_eckd_reserve(struct dasd_device
*device
)
3417 struct dasd_ccw_req
*cqr
;
3422 if (!capable(CAP_SYS_ADMIN
))
3426 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1, 32, device
);
3428 mutex_lock(&dasd_reserve_mutex
);
3430 cqr
= &dasd_reserve_req
->cqr
;
3431 memset(cqr
, 0, sizeof(*cqr
));
3432 memset(&dasd_reserve_req
->ccw
, 0,
3433 sizeof(dasd_reserve_req
->ccw
));
3434 cqr
->cpaddr
= &dasd_reserve_req
->ccw
;
3435 cqr
->data
= &dasd_reserve_req
->data
;
3436 cqr
->magic
= DASD_ECKD_MAGIC
;
3439 ccw
->cmd_code
= DASD_ECKD_CCW_RESERVE
;
3440 ccw
->flags
|= CCW_FLAG_SLI
;
3442 ccw
->cda
= (__u32
)(addr_t
) cqr
->data
;
3443 cqr
->startdev
= device
;
3444 cqr
->memdev
= device
;
3445 clear_bit(DASD_CQR_FLAGS_USE_ERP
, &cqr
->flags
);
3446 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
3447 cqr
->retries
= 2; /* set retry counter to enable basic ERP */
3448 cqr
->expires
= 2 * HZ
;
3449 cqr
->buildclk
= get_clock();
3450 cqr
->status
= DASD_CQR_FILLED
;
3452 rc
= dasd_sleep_on_immediatly(cqr
);
3454 set_bit(DASD_FLAG_IS_RESERVED
, &device
->flags
);
3457 mutex_unlock(&dasd_reserve_mutex
);
3459 dasd_sfree_request(cqr
, cqr
->memdev
);
3464 * Steal lock ioctl - unconditional reserve device.
3465 * Buils a channel programm to break a device's reservation.
3466 * (unconditional reserve)
3469 dasd_eckd_steal_lock(struct dasd_device
*device
)
3471 struct dasd_ccw_req
*cqr
;
3476 if (!capable(CAP_SYS_ADMIN
))
3480 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1, 32, device
);
3482 mutex_lock(&dasd_reserve_mutex
);
3484 cqr
= &dasd_reserve_req
->cqr
;
3485 memset(cqr
, 0, sizeof(*cqr
));
3486 memset(&dasd_reserve_req
->ccw
, 0,
3487 sizeof(dasd_reserve_req
->ccw
));
3488 cqr
->cpaddr
= &dasd_reserve_req
->ccw
;
3489 cqr
->data
= &dasd_reserve_req
->data
;
3490 cqr
->magic
= DASD_ECKD_MAGIC
;
3493 ccw
->cmd_code
= DASD_ECKD_CCW_SLCK
;
3494 ccw
->flags
|= CCW_FLAG_SLI
;
3496 ccw
->cda
= (__u32
)(addr_t
) cqr
->data
;
3497 cqr
->startdev
= device
;
3498 cqr
->memdev
= device
;
3499 clear_bit(DASD_CQR_FLAGS_USE_ERP
, &cqr
->flags
);
3500 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
3501 cqr
->retries
= 2; /* set retry counter to enable basic ERP */
3502 cqr
->expires
= 2 * HZ
;
3503 cqr
->buildclk
= get_clock();
3504 cqr
->status
= DASD_CQR_FILLED
;
3506 rc
= dasd_sleep_on_immediatly(cqr
);
3508 set_bit(DASD_FLAG_IS_RESERVED
, &device
->flags
);
3511 mutex_unlock(&dasd_reserve_mutex
);
3513 dasd_sfree_request(cqr
, cqr
->memdev
);
3518 * SNID - Sense Path Group ID
3519 * This ioctl may be used in situations where I/O is stalled due to
3520 * a reserve, so if the normal dasd_smalloc_request fails, we use the
3521 * preallocated dasd_reserve_req.
3523 static int dasd_eckd_snid(struct dasd_device
*device
,
3526 struct dasd_ccw_req
*cqr
;
3530 struct dasd_snid_ioctl_data usrparm
;
3532 if (!capable(CAP_SYS_ADMIN
))
3535 if (copy_from_user(&usrparm
, argp
, sizeof(usrparm
)))
3539 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1,
3540 sizeof(struct dasd_snid_data
), device
);
3542 mutex_lock(&dasd_reserve_mutex
);
3544 cqr
= &dasd_reserve_req
->cqr
;
3545 memset(cqr
, 0, sizeof(*cqr
));
3546 memset(&dasd_reserve_req
->ccw
, 0,
3547 sizeof(dasd_reserve_req
->ccw
));
3548 cqr
->cpaddr
= &dasd_reserve_req
->ccw
;
3549 cqr
->data
= &dasd_reserve_req
->data
;
3550 cqr
->magic
= DASD_ECKD_MAGIC
;
3553 ccw
->cmd_code
= DASD_ECKD_CCW_SNID
;
3554 ccw
->flags
|= CCW_FLAG_SLI
;
3556 ccw
->cda
= (__u32
)(addr_t
) cqr
->data
;
3557 cqr
->startdev
= device
;
3558 cqr
->memdev
= device
;
3559 clear_bit(DASD_CQR_FLAGS_USE_ERP
, &cqr
->flags
);
3560 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
3561 set_bit(DASD_CQR_ALLOW_SLOCK
, &cqr
->flags
);
3563 cqr
->expires
= 10 * HZ
;
3564 cqr
->buildclk
= get_clock();
3565 cqr
->status
= DASD_CQR_FILLED
;
3566 cqr
->lpm
= usrparm
.path_mask
;
3568 rc
= dasd_sleep_on_immediatly(cqr
);
3569 /* verify that I/O processing didn't modify the path mask */
3570 if (!rc
&& usrparm
.path_mask
&& (cqr
->lpm
!= usrparm
.path_mask
))
3573 usrparm
.data
= *((struct dasd_snid_data
*)cqr
->data
);
3574 if (copy_to_user(argp
, &usrparm
, sizeof(usrparm
)))
3579 mutex_unlock(&dasd_reserve_mutex
);
3581 dasd_sfree_request(cqr
, cqr
->memdev
);
3586 * Read performance statistics
3589 dasd_eckd_performance(struct dasd_device
*device
, void __user
*argp
)
3591 struct dasd_psf_prssd_data
*prssdp
;
3592 struct dasd_rssd_perf_stats_t
*stats
;
3593 struct dasd_ccw_req
*cqr
;
3597 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1 /* PSF */ + 1 /* RSSD */,
3598 (sizeof(struct dasd_psf_prssd_data
) +
3599 sizeof(struct dasd_rssd_perf_stats_t
)),
3602 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
3603 "Could not allocate initialization request");
3604 return PTR_ERR(cqr
);
3606 cqr
->startdev
= device
;
3607 cqr
->memdev
= device
;
3609 clear_bit(DASD_CQR_FLAGS_USE_ERP
, &cqr
->flags
);
3610 cqr
->expires
= 10 * HZ
;
3612 /* Prepare for Read Subsystem Data */
3613 prssdp
= (struct dasd_psf_prssd_data
*) cqr
->data
;
3614 memset(prssdp
, 0, sizeof(struct dasd_psf_prssd_data
));
3615 prssdp
->order
= PSF_ORDER_PRSSD
;
3616 prssdp
->suborder
= 0x01; /* Performance Statistics */
3617 prssdp
->varies
[1] = 0x01; /* Perf Statistics for the Subsystem */
3620 ccw
->cmd_code
= DASD_ECKD_CCW_PSF
;
3621 ccw
->count
= sizeof(struct dasd_psf_prssd_data
);
3622 ccw
->flags
|= CCW_FLAG_CC
;
3623 ccw
->cda
= (__u32
)(addr_t
) prssdp
;
3625 /* Read Subsystem Data - Performance Statistics */
3626 stats
= (struct dasd_rssd_perf_stats_t
*) (prssdp
+ 1);
3627 memset(stats
, 0, sizeof(struct dasd_rssd_perf_stats_t
));
3630 ccw
->cmd_code
= DASD_ECKD_CCW_RSSD
;
3631 ccw
->count
= sizeof(struct dasd_rssd_perf_stats_t
);
3632 ccw
->cda
= (__u32
)(addr_t
) stats
;
3634 cqr
->buildclk
= get_clock();
3635 cqr
->status
= DASD_CQR_FILLED
;
3636 rc
= dasd_sleep_on(cqr
);
3638 prssdp
= (struct dasd_psf_prssd_data
*) cqr
->data
;
3639 stats
= (struct dasd_rssd_perf_stats_t
*) (prssdp
+ 1);
3640 if (copy_to_user(argp
, stats
,
3641 sizeof(struct dasd_rssd_perf_stats_t
)))
3644 dasd_sfree_request(cqr
, cqr
->memdev
);
3649 * Get attributes (cache operations)
3650 * Returnes the cache attributes used in Define Extend (DE).
3653 dasd_eckd_get_attrib(struct dasd_device
*device
, void __user
*argp
)
3655 struct dasd_eckd_private
*private =
3656 (struct dasd_eckd_private
*)device
->private;
3657 struct attrib_data_t attrib
= private->attrib
;
3660 if (!capable(CAP_SYS_ADMIN
))
3666 if (copy_to_user(argp
, (long *) &attrib
,
3667 sizeof(struct attrib_data_t
)))
3674 * Set attributes (cache operations)
3675 * Stores the attributes for cache operation to be used in Define Extend (DE).
3678 dasd_eckd_set_attrib(struct dasd_device
*device
, void __user
*argp
)
3680 struct dasd_eckd_private
*private =
3681 (struct dasd_eckd_private
*)device
->private;
3682 struct attrib_data_t attrib
;
3684 if (!capable(CAP_SYS_ADMIN
))
3689 if (copy_from_user(&attrib
, argp
, sizeof(struct attrib_data_t
)))
3691 private->attrib
= attrib
;
3693 dev_info(&device
->cdev
->dev
,
3694 "The DASD cache mode was set to %x (%i cylinder prestage)\n",
3695 private->attrib
.operation
, private->attrib
.nr_cyl
);
3700 * Issue syscall I/O to EMC Symmetrix array.
3701 * CCWs are PSF and RSSD
3703 static int dasd_symm_io(struct dasd_device
*device
, void __user
*argp
)
3705 struct dasd_symmio_parms usrparm
;
3706 char *psf_data
, *rssd_result
;
3707 struct dasd_ccw_req
*cqr
;
3712 if (!capable(CAP_SYS_ADMIN
) && !capable(CAP_SYS_RAWIO
))
3716 /* Copy parms from caller */
3718 if (copy_from_user(&usrparm
, argp
, sizeof(usrparm
)))
3720 if (is_compat_task() || sizeof(long) == 4) {
3721 /* Make sure pointers are sane even on 31 bit. */
3723 if ((usrparm
.psf_data
>> 32) != 0)
3725 if ((usrparm
.rssd_result
>> 32) != 0)
3727 usrparm
.psf_data
&= 0x7fffffffULL
;
3728 usrparm
.rssd_result
&= 0x7fffffffULL
;
3730 /* alloc I/O data area */
3731 psf_data
= kzalloc(usrparm
.psf_data_len
, GFP_KERNEL
| GFP_DMA
);
3732 rssd_result
= kzalloc(usrparm
.rssd_result_len
, GFP_KERNEL
| GFP_DMA
);
3733 if (!psf_data
|| !rssd_result
) {
3738 /* get syscall header from user space */
3740 if (copy_from_user(psf_data
,
3741 (void __user
*)(unsigned long) usrparm
.psf_data
,
3742 usrparm
.psf_data_len
))
3747 /* setup CCWs for PSF + RSSD */
3748 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 2 , 0, device
);
3750 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
3751 "Could not allocate initialization request");
3756 cqr
->startdev
= device
;
3757 cqr
->memdev
= device
;
3759 cqr
->expires
= 10 * HZ
;
3760 cqr
->buildclk
= get_clock();
3761 cqr
->status
= DASD_CQR_FILLED
;
3763 /* Build the ccws */
3767 ccw
->cmd_code
= DASD_ECKD_CCW_PSF
;
3768 ccw
->count
= usrparm
.psf_data_len
;
3769 ccw
->flags
|= CCW_FLAG_CC
;
3770 ccw
->cda
= (__u32
)(addr_t
) psf_data
;
3775 ccw
->cmd_code
= DASD_ECKD_CCW_RSSD
;
3776 ccw
->count
= usrparm
.rssd_result_len
;
3777 ccw
->flags
= CCW_FLAG_SLI
;
3778 ccw
->cda
= (__u32
)(addr_t
) rssd_result
;
3780 rc
= dasd_sleep_on(cqr
);
3785 if (copy_to_user((void __user
*)(unsigned long) usrparm
.rssd_result
,
3786 rssd_result
, usrparm
.rssd_result_len
))
3791 dasd_sfree_request(cqr
, cqr
->memdev
);
3796 DBF_DEV_EVENT(DBF_WARNING
, device
,
3797 "Symmetrix ioctl (0x%02x 0x%02x): rc=%d",
3798 (int) psf0
, (int) psf1
, rc
);
3803 dasd_eckd_ioctl(struct dasd_block
*block
, unsigned int cmd
, void __user
*argp
)
3805 struct dasd_device
*device
= block
->base
;
3809 return dasd_eckd_get_attrib(device
, argp
);
3811 return dasd_eckd_set_attrib(device
, argp
);
3813 return dasd_eckd_performance(device
, argp
);
3815 return dasd_eckd_release(device
);
3817 return dasd_eckd_reserve(device
);
3819 return dasd_eckd_steal_lock(device
);
3821 return dasd_eckd_snid(device
, argp
);
3823 return dasd_symm_io(device
, argp
);
3830 * Dump the range of CCWs into 'page' buffer
3831 * and return number of printed chars.
3834 dasd_eckd_dump_ccw_range(struct ccw1
*from
, struct ccw1
*to
, char *page
)
3840 while (from
<= to
) {
3841 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3842 " CCW %p: %08X %08X DAT:",
3843 from
, ((int *) from
)[0], ((int *) from
)[1]);
3845 /* get pointer to data (consider IDALs) */
3846 if (from
->flags
& CCW_FLAG_IDA
)
3847 datap
= (char *) *((addr_t
*) (addr_t
) from
->cda
);
3849 datap
= (char *) ((addr_t
) from
->cda
);
3851 /* dump data (max 32 bytes) */
3852 for (count
= 0; count
< from
->count
&& count
< 32; count
++) {
3853 if (count
% 8 == 0) len
+= sprintf(page
+ len
, " ");
3854 if (count
% 4 == 0) len
+= sprintf(page
+ len
, " ");
3855 len
+= sprintf(page
+ len
, "%02x", datap
[count
]);
3857 len
+= sprintf(page
+ len
, "\n");
3864 dasd_eckd_dump_sense_dbf(struct dasd_device
*device
, struct irb
*irb
,
3870 sense
= (u64
*) dasd_get_sense(irb
);
3871 stat
= (u64
*) &irb
->scsw
;
3873 DBF_DEV_EVENT(DBF_EMERG
, device
, "%s: %016llx %08x : "
3874 "%016llx %016llx %016llx %016llx",
3875 reason
, *stat
, *((u32
*) (stat
+ 1)),
3876 sense
[0], sense
[1], sense
[2], sense
[3]);
3878 DBF_DEV_EVENT(DBF_EMERG
, device
, "%s: %016llx %08x : %s",
3879 reason
, *stat
, *((u32
*) (stat
+ 1)),
3885 * Print sense data and related channel program.
3886 * Parts are printed because printk buffer is only 1024 bytes.
3888 static void dasd_eckd_dump_sense_ccw(struct dasd_device
*device
,
3889 struct dasd_ccw_req
*req
, struct irb
*irb
)
3892 struct ccw1
*first
, *last
, *fail
, *from
, *to
;
3895 page
= (char *) get_zeroed_page(GFP_ATOMIC
);
3897 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
3898 "No memory to dump sense data\n");
3901 /* dump the sense data */
3902 len
= sprintf(page
, KERN_ERR PRINTK_HEADER
3903 " I/O status report for device %s:\n",
3904 dev_name(&device
->cdev
->dev
));
3905 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3906 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X "
3908 req
, scsw_cc(&irb
->scsw
), scsw_fctl(&irb
->scsw
),
3909 scsw_actl(&irb
->scsw
), scsw_stctl(&irb
->scsw
),
3910 scsw_dstat(&irb
->scsw
), scsw_cstat(&irb
->scsw
),
3911 req
? req
->intrc
: 0);
3912 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3913 " device %s: Failing CCW: %p\n",
3914 dev_name(&device
->cdev
->dev
),
3915 (void *) (addr_t
) irb
->scsw
.cmd
.cpa
);
3916 if (irb
->esw
.esw0
.erw
.cons
) {
3917 for (sl
= 0; sl
< 4; sl
++) {
3918 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3919 " Sense(hex) %2d-%2d:",
3920 (8 * sl
), ((8 * sl
) + 7));
3922 for (sct
= 0; sct
< 8; sct
++) {
3923 len
+= sprintf(page
+ len
, " %02x",
3924 irb
->ecw
[8 * sl
+ sct
]);
3926 len
+= sprintf(page
+ len
, "\n");
3929 if (irb
->ecw
[27] & DASD_SENSE_BIT_0
) {
3930 /* 24 Byte Sense Data */
3931 sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3932 " 24 Byte: %x MSG %x, "
3933 "%s MSGb to SYSOP\n",
3934 irb
->ecw
[7] >> 4, irb
->ecw
[7] & 0x0f,
3935 irb
->ecw
[1] & 0x10 ? "" : "no");
3937 /* 32 Byte Sense Data */
3938 sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3939 " 32 Byte: Format: %x "
3940 "Exception class %x\n",
3941 irb
->ecw
[6] & 0x0f, irb
->ecw
[22] >> 4);
3944 sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3945 " SORRY - NO VALID SENSE AVAILABLE\n");
3950 /* req == NULL for unsolicited interrupts */
3951 /* dump the Channel Program (max 140 Bytes per line) */
3952 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */
3953 first
= req
->cpaddr
;
3954 for (last
= first
; last
->flags
& (CCW_FLAG_CC
| CCW_FLAG_DC
); last
++);
3955 to
= min(first
+ 6, last
);
3956 len
= sprintf(page
, KERN_ERR PRINTK_HEADER
3957 " Related CP in req: %p\n", req
);
3958 dasd_eckd_dump_ccw_range(first
, to
, page
+ len
);
3961 /* print failing CCW area (maximum 4) */
3962 /* scsw->cda is either valid or zero */
3965 fail
= (struct ccw1
*)(addr_t
)
3966 irb
->scsw
.cmd
.cpa
; /* failing CCW */
3967 if (from
< fail
- 2) {
3968 from
= fail
- 2; /* there is a gap - print header */
3969 len
+= sprintf(page
, KERN_ERR PRINTK_HEADER
"......\n");
3971 to
= min(fail
+ 1, last
);
3972 len
+= dasd_eckd_dump_ccw_range(from
, to
, page
+ len
);
3974 /* print last CCWs (maximum 2) */
3975 from
= max(from
, ++to
);
3976 if (from
< last
- 1) {
3977 from
= last
- 1; /* there is a gap - print header */
3978 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
"......\n");
3980 len
+= dasd_eckd_dump_ccw_range(from
, last
, page
+ len
);
3984 free_page((unsigned long) page
);
3989 * Print sense data from a tcw.
3991 static void dasd_eckd_dump_sense_tcw(struct dasd_device
*device
,
3992 struct dasd_ccw_req
*req
, struct irb
*irb
)
3995 int len
, sl
, sct
, residual
;
3999 page
= (char *) get_zeroed_page(GFP_ATOMIC
);
4001 DBF_DEV_EVENT(DBF_WARNING
, device
, " %s",
4002 "No memory to dump sense data");
4005 /* dump the sense data */
4006 len
= sprintf(page
, KERN_ERR PRINTK_HEADER
4007 " I/O status report for device %s:\n",
4008 dev_name(&device
->cdev
->dev
));
4009 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
4010 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X "
4011 "CS:%02X fcxs:%02X schxs:%02X RC:%d\n",
4012 req
, scsw_cc(&irb
->scsw
), scsw_fctl(&irb
->scsw
),
4013 scsw_actl(&irb
->scsw
), scsw_stctl(&irb
->scsw
),
4014 scsw_dstat(&irb
->scsw
), scsw_cstat(&irb
->scsw
),
4015 irb
->scsw
.tm
.fcxs
, irb
->scsw
.tm
.schxs
,
4016 req
? req
->intrc
: 0);
4017 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
4018 " device %s: Failing TCW: %p\n",
4019 dev_name(&device
->cdev
->dev
),
4020 (void *) (addr_t
) irb
->scsw
.tm
.tcw
);
4024 if (irb
->scsw
.tm
.tcw
&& (irb
->scsw
.tm
.fcxs
& 0x01))
4026 (struct tcw
*)(unsigned long)irb
->scsw
.tm
.tcw
);
4029 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
4030 " tsb->length %d\n", tsb
->length
);
4031 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
4032 " tsb->flags %x\n", tsb
->flags
);
4033 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
4034 " tsb->dcw_offset %d\n", tsb
->dcw_offset
);
4035 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
4036 " tsb->count %d\n", tsb
->count
);
4037 residual
= tsb
->count
- 28;
4038 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
4039 " residual %d\n", residual
);
4041 switch (tsb
->flags
& 0x07) {
4042 case 1: /* tsa_iostat */
4043 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
4044 " tsb->tsa.iostat.dev_time %d\n",
4045 tsb
->tsa
.iostat
.dev_time
);
4046 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
4047 " tsb->tsa.iostat.def_time %d\n",
4048 tsb
->tsa
.iostat
.def_time
);
4049 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
4050 " tsb->tsa.iostat.queue_time %d\n",
4051 tsb
->tsa
.iostat
.queue_time
);
4052 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
4053 " tsb->tsa.iostat.dev_busy_time %d\n",
4054 tsb
->tsa
.iostat
.dev_busy_time
);
4055 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
4056 " tsb->tsa.iostat.dev_act_time %d\n",
4057 tsb
->tsa
.iostat
.dev_act_time
);
4058 sense
= tsb
->tsa
.iostat
.sense
;
4060 case 2: /* ts_ddpc */
4061 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
4062 " tsb->tsa.ddpc.rc %d\n", tsb
->tsa
.ddpc
.rc
);
4063 for (sl
= 0; sl
< 2; sl
++) {
4064 len
+= sprintf(page
+ len
,
4065 KERN_ERR PRINTK_HEADER
4066 " tsb->tsa.ddpc.rcq %2d-%2d: ",
4067 (8 * sl
), ((8 * sl
) + 7));
4068 rcq
= tsb
->tsa
.ddpc
.rcq
;
4069 for (sct
= 0; sct
< 8; sct
++) {
4070 len
+= sprintf(page
+ len
, " %02x",
4073 len
+= sprintf(page
+ len
, "\n");
4075 sense
= tsb
->tsa
.ddpc
.sense
;
4077 case 3: /* tsa_intrg */
4078 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
4079 " tsb->tsa.intrg.: not supportet yet \n");
4084 for (sl
= 0; sl
< 4; sl
++) {
4085 len
+= sprintf(page
+ len
,
4086 KERN_ERR PRINTK_HEADER
4087 " Sense(hex) %2d-%2d:",
4088 (8 * sl
), ((8 * sl
) + 7));
4089 for (sct
= 0; sct
< 8; sct
++) {
4090 len
+= sprintf(page
+ len
, " %02x",
4091 sense
[8 * sl
+ sct
]);
4093 len
+= sprintf(page
+ len
, "\n");
4096 if (sense
[27] & DASD_SENSE_BIT_0
) {
4097 /* 24 Byte Sense Data */
4098 sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
4099 " 24 Byte: %x MSG %x, "
4100 "%s MSGb to SYSOP\n",
4101 sense
[7] >> 4, sense
[7] & 0x0f,
4102 sense
[1] & 0x10 ? "" : "no");
4104 /* 32 Byte Sense Data */
4105 sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
4106 " 32 Byte: Format: %x "
4107 "Exception class %x\n",
4108 sense
[6] & 0x0f, sense
[22] >> 4);
4111 sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
4112 " SORRY - NO VALID SENSE AVAILABLE\n");
4115 sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
4116 " SORRY - NO TSB DATA AVAILABLE\n");
4119 free_page((unsigned long) page
);
4122 static void dasd_eckd_dump_sense(struct dasd_device
*device
,
4123 struct dasd_ccw_req
*req
, struct irb
*irb
)
4125 if (scsw_is_tm(&irb
->scsw
))
4126 dasd_eckd_dump_sense_tcw(device
, req
, irb
);
4128 dasd_eckd_dump_sense_ccw(device
, req
, irb
);
4131 static int dasd_eckd_pm_freeze(struct dasd_device
*device
)
4134 * the device should be disconnected from our LCU structure
4135 * on restore we will reconnect it and reread LCU specific
4136 * information like PAV support that might have changed
4138 dasd_alias_remove_device(device
);
4139 dasd_alias_disconnect_device_from_lcu(device
);
4144 static int dasd_eckd_restore_device(struct dasd_device
*device
)
4146 struct dasd_eckd_private
*private;
4147 struct dasd_eckd_characteristics temp_rdc_data
;
4149 struct dasd_uid temp_uid
;
4150 unsigned long flags
;
4152 private = (struct dasd_eckd_private
*) device
->private;
4154 /* Read Configuration Data */
4155 rc
= dasd_eckd_read_conf(device
);
4159 dasd_eckd_get_uid(device
, &temp_uid
);
4160 /* Generate device unique id */
4161 rc
= dasd_eckd_generate_uid(device
);
4162 spin_lock_irqsave(get_ccwdev_lock(device
->cdev
), flags
);
4163 if (memcmp(&private->uid
, &temp_uid
, sizeof(struct dasd_uid
)) != 0)
4164 dev_err(&device
->cdev
->dev
, "The UID of the DASD has "
4166 spin_unlock_irqrestore(get_ccwdev_lock(device
->cdev
), flags
);
4170 /* register lcu with alias handling, enable PAV if this is a new lcu */
4171 rc
= dasd_alias_make_device_known_to_lcu(device
);
4174 dasd_eckd_validate_server(device
, DASD_CQR_FLAGS_FAILFAST
);
4176 /* RE-Read Configuration Data */
4177 rc
= dasd_eckd_read_conf(device
);
4181 /* Read Feature Codes */
4182 dasd_eckd_read_features(device
);
4184 /* Read Device Characteristics */
4185 rc
= dasd_generic_read_dev_chars(device
, DASD_ECKD_MAGIC
,
4186 &temp_rdc_data
, 64);
4188 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
,
4189 "Read device characteristic failed, rc=%d", rc
);
4192 spin_lock_irqsave(get_ccwdev_lock(device
->cdev
), flags
);
4193 memcpy(&private->rdc_data
, &temp_rdc_data
, sizeof(temp_rdc_data
));
4194 spin_unlock_irqrestore(get_ccwdev_lock(device
->cdev
), flags
);
4196 /* add device to alias management */
4197 dasd_alias_add_device(device
);
4205 static int dasd_eckd_reload_device(struct dasd_device
*device
)
4207 struct dasd_eckd_private
*private;
4210 struct dasd_uid uid
;
4211 unsigned long flags
;
4213 private = (struct dasd_eckd_private
*) device
->private;
4215 spin_lock_irqsave(get_ccwdev_lock(device
->cdev
), flags
);
4216 old_base
= private->uid
.base_unit_addr
;
4217 spin_unlock_irqrestore(get_ccwdev_lock(device
->cdev
), flags
);
4219 /* Read Configuration Data */
4220 rc
= dasd_eckd_read_conf(device
);
4224 rc
= dasd_eckd_generate_uid(device
);
4228 * update unit address configuration and
4229 * add device to alias management
4231 dasd_alias_update_add_device(device
);
4233 dasd_eckd_get_uid(device
, &uid
);
4235 if (old_base
!= uid
.base_unit_addr
) {
4236 if (strlen(uid
.vduit
) > 0)
4237 snprintf(print_uid
, sizeof(print_uid
),
4238 "%s.%s.%04x.%02x.%s", uid
.vendor
, uid
.serial
,
4239 uid
.ssid
, uid
.base_unit_addr
, uid
.vduit
);
4241 snprintf(print_uid
, sizeof(print_uid
),
4242 "%s.%s.%04x.%02x", uid
.vendor
, uid
.serial
,
4243 uid
.ssid
, uid
.base_unit_addr
);
4245 dev_info(&device
->cdev
->dev
,
4246 "An Alias device was reassigned to a new base device "
4247 "with UID: %s\n", print_uid
);
4255 static struct ccw_driver dasd_eckd_driver
= {
4257 .name
= "dasd-eckd",
4258 .owner
= THIS_MODULE
,
4260 .ids
= dasd_eckd_ids
,
4261 .probe
= dasd_eckd_probe
,
4262 .remove
= dasd_generic_remove
,
4263 .set_offline
= dasd_generic_set_offline
,
4264 .set_online
= dasd_eckd_set_online
,
4265 .notify
= dasd_generic_notify
,
4266 .path_event
= dasd_generic_path_event
,
4267 .shutdown
= dasd_generic_shutdown
,
4268 .freeze
= dasd_generic_pm_freeze
,
4269 .thaw
= dasd_generic_restore_device
,
4270 .restore
= dasd_generic_restore_device
,
4271 .uc_handler
= dasd_generic_uc_handler
,
4272 .int_class
= IOINT_DAS
,
4276 * max_blocks is dependent on the amount of storage that is available
4277 * in the static io buffer for each device. Currently each device has
4278 * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has
4279 * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use
4280 * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In
4281 * addition we have one define extent ccw + 16 bytes of data and one
4282 * locate record ccw + 16 bytes of data. That makes:
4283 * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum.
4284 * We want to fit two into the available memory so that we can immediately
4285 * start the next request if one finishes off. That makes 249.5 blocks
4286 * for one request. Give a little safety and the result is 240.
4288 static struct dasd_discipline dasd_eckd_discipline
= {
4289 .owner
= THIS_MODULE
,
4293 .check_device
= dasd_eckd_check_characteristics
,
4294 .uncheck_device
= dasd_eckd_uncheck_device
,
4295 .do_analysis
= dasd_eckd_do_analysis
,
4296 .verify_path
= dasd_eckd_verify_path
,
4297 .ready_to_online
= dasd_eckd_ready_to_online
,
4298 .online_to_ready
= dasd_eckd_online_to_ready
,
4299 .fill_geometry
= dasd_eckd_fill_geometry
,
4300 .start_IO
= dasd_start_IO
,
4301 .term_IO
= dasd_term_IO
,
4302 .handle_terminated_request
= dasd_eckd_handle_terminated_request
,
4303 .format_device
= dasd_eckd_format_device
,
4304 .erp_action
= dasd_eckd_erp_action
,
4305 .erp_postaction
= dasd_eckd_erp_postaction
,
4306 .check_for_device_change
= dasd_eckd_check_for_device_change
,
4307 .build_cp
= dasd_eckd_build_alias_cp
,
4308 .free_cp
= dasd_eckd_free_alias_cp
,
4309 .dump_sense
= dasd_eckd_dump_sense
,
4310 .dump_sense_dbf
= dasd_eckd_dump_sense_dbf
,
4311 .fill_info
= dasd_eckd_fill_info
,
4312 .ioctl
= dasd_eckd_ioctl
,
4313 .freeze
= dasd_eckd_pm_freeze
,
4314 .restore
= dasd_eckd_restore_device
,
4315 .reload
= dasd_eckd_reload_device
,
4316 .get_uid
= dasd_eckd_get_uid
,
4317 .kick_validate
= dasd_eckd_kick_validate_server
,
4321 dasd_eckd_init(void)
4325 ASCEBC(dasd_eckd_discipline
.ebcname
, 4);
4326 dasd_reserve_req
= kmalloc(sizeof(*dasd_reserve_req
),
4327 GFP_KERNEL
| GFP_DMA
);
4328 if (!dasd_reserve_req
)
4330 path_verification_worker
= kmalloc(sizeof(*path_verification_worker
),
4331 GFP_KERNEL
| GFP_DMA
);
4332 if (!path_verification_worker
) {
4333 kfree(dasd_reserve_req
);
4336 ret
= ccw_driver_register(&dasd_eckd_driver
);
4338 wait_for_device_probe();
4340 kfree(path_verification_worker
);
4341 kfree(dasd_reserve_req
);
4347 dasd_eckd_cleanup(void)
4349 ccw_driver_unregister(&dasd_eckd_driver
);
4350 kfree(path_verification_worker
);
4351 kfree(dasd_reserve_req
);
4354 module_init(dasd_eckd_init
);
4355 module_exit(dasd_eckd_cleanup
);