2 * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
3 * Horst Hummel <Horst.Hummel@de.ibm.com>
4 * Carsten Otte <Cotte@de.ibm.com>
5 * Martin Schwidefsky <schwidefsky@de.ibm.com>
6 * Bugreports.to..: <Linux390@de.ibm.com>
7 * Copyright IBM Corp. 1999, 2009
8 * EMC Symmetrix ioctl Copyright EMC Corporation, 2008
9 * Author.........: Nigel Hislop <hislop_nigel@emc.com>
12 #define KMSG_COMPONENT "dasd-eckd"
14 #include <linux/stddef.h>
15 #include <linux/kernel.h>
16 #include <linux/slab.h>
17 #include <linux/hdreg.h> /* HDIO_GETGEO */
18 #include <linux/bio.h>
19 #include <linux/module.h>
20 #include <linux/compat.h>
21 #include <linux/init.h>
23 #include <asm/css_chars.h>
24 #include <asm/debug.h>
25 #include <asm/idals.h>
26 #include <asm/ebcdic.h>
28 #include <asm/uaccess.h>
30 #include <asm/ccwdev.h>
34 #include "dasd_eckd.h"
38 #endif /* PRINTK_HEADER */
39 #define PRINTK_HEADER "dasd(eckd):"
41 #define ECKD_C0(i) (i->home_bytes)
42 #define ECKD_F(i) (i->formula)
43 #define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\
44 (i->factors.f_0x02.f1))
45 #define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\
46 (i->factors.f_0x02.f2))
47 #define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\
48 (i->factors.f_0x02.f3))
49 #define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0)
50 #define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0)
51 #define ECKD_F6(i) (i->factor6)
52 #define ECKD_F7(i) (i->factor7)
53 #define ECKD_F8(i) (i->factor8)
56 * raw track access always map to 64k in memory
57 * so it maps to 16 blocks of 4k per track
59 #define DASD_RAW_BLOCK_PER_TRACK 16
60 #define DASD_RAW_BLOCKSIZE 4096
61 /* 64k are 128 x 512 byte sectors */
62 #define DASD_RAW_SECTORS_PER_TRACK 128
64 MODULE_LICENSE("GPL");
66 static struct dasd_discipline dasd_eckd_discipline
;
68 /* The ccw bus type uses this table to find devices that it sends to
70 static struct ccw_device_id dasd_eckd_ids
[] = {
71 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info
= 0x1},
72 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info
= 0x2},
73 { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3380, 0), .driver_info
= 0x3},
74 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info
= 0x4},
75 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info
= 0x5},
76 { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info
= 0x6},
77 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info
= 0x7},
78 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info
= 0x8},
79 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info
= 0x9},
80 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info
= 0xa},
81 { /* end of list */ },
84 MODULE_DEVICE_TABLE(ccw
, dasd_eckd_ids
);
86 static struct ccw_driver dasd_eckd_driver
; /* see below */
88 static void *rawpadpage
;
91 #define INIT_CQR_UNFORMATTED 1
92 #define INIT_CQR_ERROR 2
94 /* emergency request for reserve/release */
96 struct dasd_ccw_req cqr
;
100 static DEFINE_MUTEX(dasd_reserve_mutex
);
102 /* definitions for the path verification worker */
103 struct path_verification_work_data
{
104 struct work_struct worker
;
105 struct dasd_device
*device
;
106 struct dasd_ccw_req cqr
;
108 __u8 rcd_buffer
[DASD_ECKD_RCD_DATA_SIZE
];
112 static struct path_verification_work_data
*path_verification_worker
;
113 static DEFINE_MUTEX(dasd_path_verification_mutex
);
115 /* initial attempt at a probe function. this can be simplified once
116 * the other detection code is gone */
118 dasd_eckd_probe (struct ccw_device
*cdev
)
122 /* set ECKD specific ccw-device options */
123 ret
= ccw_device_set_options(cdev
, CCWDEV_ALLOW_FORCE
|
124 CCWDEV_DO_PATHGROUP
| CCWDEV_DO_MULTIPATH
);
126 DBF_EVENT_DEVID(DBF_WARNING
, cdev
, "%s",
127 "dasd_eckd_probe: could not set "
128 "ccw-device options");
131 ret
= dasd_generic_probe(cdev
, &dasd_eckd_discipline
);
136 dasd_eckd_set_online(struct ccw_device
*cdev
)
138 return dasd_generic_set_online(cdev
, &dasd_eckd_discipline
);
141 static const int sizes_trk0
[] = { 28, 148, 84 };
142 #define LABEL_SIZE 140
144 /* head and record addresses of count_area read in analysis ccw */
145 static const int count_area_head
[] = { 0, 0, 0, 0, 2 };
146 static const int count_area_rec
[] = { 1, 2, 3, 4, 1 };
148 static inline unsigned int
149 round_up_multiple(unsigned int no
, unsigned int mult
)
152 return (rem
? no
- rem
+ mult
: no
);
155 static inline unsigned int
156 ceil_quot(unsigned int d1
, unsigned int d2
)
158 return (d1
+ (d2
- 1)) / d2
;
162 recs_per_track(struct dasd_eckd_characteristics
* rdc
,
163 unsigned int kl
, unsigned int dl
)
167 switch (rdc
->dev_type
) {
170 return 1499 / (15 + 7 + ceil_quot(kl
+ 12, 32) +
171 ceil_quot(dl
+ 12, 32));
173 return 1499 / (15 + ceil_quot(dl
+ 12, 32));
175 dn
= ceil_quot(dl
+ 6, 232) + 1;
177 kn
= ceil_quot(kl
+ 6, 232) + 1;
178 return 1729 / (10 + 9 + ceil_quot(kl
+ 6 * kn
, 34) +
179 9 + ceil_quot(dl
+ 6 * dn
, 34));
181 return 1729 / (10 + 9 + ceil_quot(dl
+ 6 * dn
, 34));
183 dn
= ceil_quot(dl
+ 6, 232) + 1;
185 kn
= ceil_quot(kl
+ 6, 232) + 1;
186 return 1420 / (18 + 7 + ceil_quot(kl
+ 6 * kn
, 34) +
187 ceil_quot(dl
+ 6 * dn
, 34));
189 return 1420 / (18 + 7 + ceil_quot(dl
+ 6 * dn
, 34));
194 static void set_ch_t(struct ch_t
*geo
, __u32 cyl
, __u8 head
)
196 geo
->cyl
= (__u16
) cyl
;
197 geo
->head
= cyl
>> 16;
203 check_XRC (struct ccw1
*de_ccw
,
204 struct DE_eckd_data
*data
,
205 struct dasd_device
*device
)
207 struct dasd_eckd_private
*private;
210 private = (struct dasd_eckd_private
*) device
->private;
211 if (!private->rdc_data
.facilities
.XRC_supported
)
214 /* switch on System Time Stamp - needed for XRC Support */
215 data
->ga_extended
|= 0x08; /* switch on 'Time Stamp Valid' */
216 data
->ga_extended
|= 0x02; /* switch on 'Extended Parameter' */
218 rc
= get_sync_clock(&data
->ep_sys_time
);
219 /* Ignore return code if sync clock is switched off. */
220 if (rc
== -EOPNOTSUPP
|| rc
== -EACCES
)
223 de_ccw
->count
= sizeof(struct DE_eckd_data
);
224 de_ccw
->flags
|= CCW_FLAG_SLI
;
229 define_extent(struct ccw1
*ccw
, struct DE_eckd_data
*data
, unsigned int trk
,
230 unsigned int totrk
, int cmd
, struct dasd_device
*device
)
232 struct dasd_eckd_private
*private;
234 u16 heads
, beghead
, endhead
;
237 private = (struct dasd_eckd_private
*) device
->private;
239 ccw
->cmd_code
= DASD_ECKD_CCW_DEFINE_EXTENT
;
242 ccw
->cda
= (__u32
) __pa(data
);
244 memset(data
, 0, sizeof(struct DE_eckd_data
));
246 case DASD_ECKD_CCW_READ_HOME_ADDRESS
:
247 case DASD_ECKD_CCW_READ_RECORD_ZERO
:
248 case DASD_ECKD_CCW_READ
:
249 case DASD_ECKD_CCW_READ_MT
:
250 case DASD_ECKD_CCW_READ_CKD
:
251 case DASD_ECKD_CCW_READ_CKD_MT
:
252 case DASD_ECKD_CCW_READ_KD
:
253 case DASD_ECKD_CCW_READ_KD_MT
:
254 case DASD_ECKD_CCW_READ_COUNT
:
255 data
->mask
.perm
= 0x1;
256 data
->attributes
.operation
= private->attrib
.operation
;
258 case DASD_ECKD_CCW_WRITE
:
259 case DASD_ECKD_CCW_WRITE_MT
:
260 case DASD_ECKD_CCW_WRITE_KD
:
261 case DASD_ECKD_CCW_WRITE_KD_MT
:
262 data
->mask
.perm
= 0x02;
263 data
->attributes
.operation
= private->attrib
.operation
;
264 rc
= check_XRC (ccw
, data
, device
);
266 case DASD_ECKD_CCW_WRITE_CKD
:
267 case DASD_ECKD_CCW_WRITE_CKD_MT
:
268 data
->attributes
.operation
= DASD_BYPASS_CACHE
;
269 rc
= check_XRC (ccw
, data
, device
);
271 case DASD_ECKD_CCW_ERASE
:
272 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS
:
273 case DASD_ECKD_CCW_WRITE_RECORD_ZERO
:
274 data
->mask
.perm
= 0x3;
275 data
->mask
.auth
= 0x1;
276 data
->attributes
.operation
= DASD_BYPASS_CACHE
;
277 rc
= check_XRC (ccw
, data
, device
);
280 dev_err(&device
->cdev
->dev
,
281 "0x%x is not a known command\n", cmd
);
285 data
->attributes
.mode
= 0x3; /* ECKD */
287 if ((private->rdc_data
.cu_type
== 0x2105 ||
288 private->rdc_data
.cu_type
== 0x2107 ||
289 private->rdc_data
.cu_type
== 0x1750)
290 && !(private->uses_cdl
&& trk
< 2))
291 data
->ga_extended
|= 0x40; /* Regular Data Format Mode */
293 heads
= private->rdc_data
.trk_per_cyl
;
294 begcyl
= trk
/ heads
;
295 beghead
= trk
% heads
;
296 endcyl
= totrk
/ heads
;
297 endhead
= totrk
% heads
;
299 /* check for sequential prestage - enhance cylinder range */
300 if (data
->attributes
.operation
== DASD_SEQ_PRESTAGE
||
301 data
->attributes
.operation
== DASD_SEQ_ACCESS
) {
303 if (endcyl
+ private->attrib
.nr_cyl
< private->real_cyl
)
304 endcyl
+= private->attrib
.nr_cyl
;
306 endcyl
= (private->real_cyl
- 1);
309 set_ch_t(&data
->beg_ext
, begcyl
, beghead
);
310 set_ch_t(&data
->end_ext
, endcyl
, endhead
);
314 static int check_XRC_on_prefix(struct PFX_eckd_data
*pfxdata
,
315 struct dasd_device
*device
)
317 struct dasd_eckd_private
*private;
320 private = (struct dasd_eckd_private
*) device
->private;
321 if (!private->rdc_data
.facilities
.XRC_supported
)
324 /* switch on System Time Stamp - needed for XRC Support */
325 pfxdata
->define_extent
.ga_extended
|= 0x08; /* 'Time Stamp Valid' */
326 pfxdata
->define_extent
.ga_extended
|= 0x02; /* 'Extended Parameter' */
327 pfxdata
->validity
.time_stamp
= 1; /* 'Time Stamp Valid' */
329 rc
= get_sync_clock(&pfxdata
->define_extent
.ep_sys_time
);
330 /* Ignore return code if sync clock is switched off. */
331 if (rc
== -EOPNOTSUPP
|| rc
== -EACCES
)
336 static void fill_LRE_data(struct LRE_eckd_data
*data
, unsigned int trk
,
337 unsigned int rec_on_trk
, int count
, int cmd
,
338 struct dasd_device
*device
, unsigned int reclen
,
341 struct dasd_eckd_private
*private;
345 private = (struct dasd_eckd_private
*) device
->private;
347 memset(data
, 0, sizeof(*data
));
350 switch (private->rdc_data
.dev_type
) {
352 dn
= ceil_quot(reclen
+ 6, 232);
353 d
= 9 + ceil_quot(reclen
+ 6 * (dn
+ 1), 34);
354 sector
= (49 + (rec_on_trk
- 1) * (10 + d
)) / 8;
357 d
= 7 + ceil_quot(reclen
+ 12, 32);
358 sector
= (39 + (rec_on_trk
- 1) * (8 + d
)) / 7;
362 data
->sector
= sector
;
363 /* note: meaning of count depends on the operation
364 * for record based I/O it's the number of records, but for
365 * track based I/O it's the number of tracks
369 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS
:
370 data
->operation
.orientation
= 0x3;
371 data
->operation
.operation
= 0x03;
373 case DASD_ECKD_CCW_READ_HOME_ADDRESS
:
374 data
->operation
.orientation
= 0x3;
375 data
->operation
.operation
= 0x16;
377 case DASD_ECKD_CCW_WRITE_RECORD_ZERO
:
378 data
->operation
.orientation
= 0x1;
379 data
->operation
.operation
= 0x03;
382 case DASD_ECKD_CCW_READ_RECORD_ZERO
:
383 data
->operation
.orientation
= 0x3;
384 data
->operation
.operation
= 0x16;
387 case DASD_ECKD_CCW_WRITE
:
388 case DASD_ECKD_CCW_WRITE_MT
:
389 case DASD_ECKD_CCW_WRITE_KD
:
390 case DASD_ECKD_CCW_WRITE_KD_MT
:
391 data
->auxiliary
.length_valid
= 0x1;
392 data
->length
= reclen
;
393 data
->operation
.operation
= 0x01;
395 case DASD_ECKD_CCW_WRITE_CKD
:
396 case DASD_ECKD_CCW_WRITE_CKD_MT
:
397 data
->auxiliary
.length_valid
= 0x1;
398 data
->length
= reclen
;
399 data
->operation
.operation
= 0x03;
401 case DASD_ECKD_CCW_WRITE_FULL_TRACK
:
402 data
->operation
.orientation
= 0x0;
403 data
->operation
.operation
= 0x3F;
404 data
->extended_operation
= 0x11;
406 data
->extended_parameter_length
= 0x02;
407 if (data
->count
> 8) {
408 data
->extended_parameter
[0] = 0xFF;
409 data
->extended_parameter
[1] = 0xFF;
410 data
->extended_parameter
[1] <<= (16 - count
);
412 data
->extended_parameter
[0] = 0xFF;
413 data
->extended_parameter
[0] <<= (8 - count
);
414 data
->extended_parameter
[1] = 0x00;
418 case DASD_ECKD_CCW_WRITE_TRACK_DATA
:
419 data
->auxiliary
.length_valid
= 0x1;
420 data
->length
= reclen
; /* not tlf, as one might think */
421 data
->operation
.operation
= 0x3F;
422 data
->extended_operation
= 0x23;
424 case DASD_ECKD_CCW_READ
:
425 case DASD_ECKD_CCW_READ_MT
:
426 case DASD_ECKD_CCW_READ_KD
:
427 case DASD_ECKD_CCW_READ_KD_MT
:
428 data
->auxiliary
.length_valid
= 0x1;
429 data
->length
= reclen
;
430 data
->operation
.operation
= 0x06;
432 case DASD_ECKD_CCW_READ_CKD
:
433 case DASD_ECKD_CCW_READ_CKD_MT
:
434 data
->auxiliary
.length_valid
= 0x1;
435 data
->length
= reclen
;
436 data
->operation
.operation
= 0x16;
438 case DASD_ECKD_CCW_READ_COUNT
:
439 data
->operation
.operation
= 0x06;
441 case DASD_ECKD_CCW_READ_TRACK
:
442 data
->operation
.orientation
= 0x1;
443 data
->operation
.operation
= 0x0C;
444 data
->extended_parameter_length
= 0;
447 case DASD_ECKD_CCW_READ_TRACK_DATA
:
448 data
->auxiliary
.length_valid
= 0x1;
450 data
->operation
.operation
= 0x0C;
452 case DASD_ECKD_CCW_ERASE
:
453 data
->length
= reclen
;
454 data
->auxiliary
.length_valid
= 0x1;
455 data
->operation
.operation
= 0x0b;
458 DBF_DEV_EVENT(DBF_ERR
, device
,
459 "fill LRE unknown opcode 0x%x", cmd
);
462 set_ch_t(&data
->seek_addr
,
463 trk
/ private->rdc_data
.trk_per_cyl
,
464 trk
% private->rdc_data
.trk_per_cyl
);
465 data
->search_arg
.cyl
= data
->seek_addr
.cyl
;
466 data
->search_arg
.head
= data
->seek_addr
.head
;
467 data
->search_arg
.record
= rec_on_trk
;
470 static int prefix_LRE(struct ccw1
*ccw
, struct PFX_eckd_data
*pfxdata
,
471 unsigned int trk
, unsigned int totrk
, int cmd
,
472 struct dasd_device
*basedev
, struct dasd_device
*startdev
,
473 unsigned char format
, unsigned int rec_on_trk
, int count
,
474 unsigned int blksize
, unsigned int tlf
)
476 struct dasd_eckd_private
*basepriv
, *startpriv
;
477 struct DE_eckd_data
*dedata
;
478 struct LRE_eckd_data
*lredata
;
480 u16 heads
, beghead
, endhead
;
483 basepriv
= (struct dasd_eckd_private
*) basedev
->private;
484 startpriv
= (struct dasd_eckd_private
*) startdev
->private;
485 dedata
= &pfxdata
->define_extent
;
486 lredata
= &pfxdata
->locate_record
;
488 ccw
->cmd_code
= DASD_ECKD_CCW_PFX
;
490 if (cmd
== DASD_ECKD_CCW_WRITE_FULL_TRACK
) {
491 ccw
->count
= sizeof(*pfxdata
) + 2;
492 ccw
->cda
= (__u32
) __pa(pfxdata
);
493 memset(pfxdata
, 0, sizeof(*pfxdata
) + 2);
495 ccw
->count
= sizeof(*pfxdata
);
496 ccw
->cda
= (__u32
) __pa(pfxdata
);
497 memset(pfxdata
, 0, sizeof(*pfxdata
));
502 DBF_DEV_EVENT(DBF_ERR
, basedev
,
503 "PFX LRE unknown format 0x%x", format
);
507 pfxdata
->format
= format
;
508 pfxdata
->base_address
= basepriv
->ned
->unit_addr
;
509 pfxdata
->base_lss
= basepriv
->ned
->ID
;
510 pfxdata
->validity
.define_extent
= 1;
512 /* private uid is kept up to date, conf_data may be outdated */
513 if (startpriv
->uid
.type
!= UA_BASE_DEVICE
) {
514 pfxdata
->validity
.verify_base
= 1;
515 if (startpriv
->uid
.type
== UA_HYPER_PAV_ALIAS
)
516 pfxdata
->validity
.hyper_pav
= 1;
519 /* define extend data (mostly)*/
521 case DASD_ECKD_CCW_READ_HOME_ADDRESS
:
522 case DASD_ECKD_CCW_READ_RECORD_ZERO
:
523 case DASD_ECKD_CCW_READ
:
524 case DASD_ECKD_CCW_READ_MT
:
525 case DASD_ECKD_CCW_READ_CKD
:
526 case DASD_ECKD_CCW_READ_CKD_MT
:
527 case DASD_ECKD_CCW_READ_KD
:
528 case DASD_ECKD_CCW_READ_KD_MT
:
529 case DASD_ECKD_CCW_READ_COUNT
:
530 dedata
->mask
.perm
= 0x1;
531 dedata
->attributes
.operation
= basepriv
->attrib
.operation
;
533 case DASD_ECKD_CCW_READ_TRACK
:
534 case DASD_ECKD_CCW_READ_TRACK_DATA
:
535 dedata
->mask
.perm
= 0x1;
536 dedata
->attributes
.operation
= basepriv
->attrib
.operation
;
537 dedata
->blk_size
= 0;
539 case DASD_ECKD_CCW_WRITE
:
540 case DASD_ECKD_CCW_WRITE_MT
:
541 case DASD_ECKD_CCW_WRITE_KD
:
542 case DASD_ECKD_CCW_WRITE_KD_MT
:
543 dedata
->mask
.perm
= 0x02;
544 dedata
->attributes
.operation
= basepriv
->attrib
.operation
;
545 rc
= check_XRC_on_prefix(pfxdata
, basedev
);
547 case DASD_ECKD_CCW_WRITE_CKD
:
548 case DASD_ECKD_CCW_WRITE_CKD_MT
:
549 dedata
->attributes
.operation
= DASD_BYPASS_CACHE
;
550 rc
= check_XRC_on_prefix(pfxdata
, basedev
);
552 case DASD_ECKD_CCW_ERASE
:
553 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS
:
554 case DASD_ECKD_CCW_WRITE_RECORD_ZERO
:
555 dedata
->mask
.perm
= 0x3;
556 dedata
->mask
.auth
= 0x1;
557 dedata
->attributes
.operation
= DASD_BYPASS_CACHE
;
558 rc
= check_XRC_on_prefix(pfxdata
, basedev
);
560 case DASD_ECKD_CCW_WRITE_FULL_TRACK
:
561 dedata
->mask
.perm
= 0x03;
562 dedata
->attributes
.operation
= basepriv
->attrib
.operation
;
563 dedata
->blk_size
= 0;
565 case DASD_ECKD_CCW_WRITE_TRACK_DATA
:
566 dedata
->mask
.perm
= 0x02;
567 dedata
->attributes
.operation
= basepriv
->attrib
.operation
;
568 dedata
->blk_size
= blksize
;
569 rc
= check_XRC_on_prefix(pfxdata
, basedev
);
572 DBF_DEV_EVENT(DBF_ERR
, basedev
,
573 "PFX LRE unknown opcode 0x%x", cmd
);
578 dedata
->attributes
.mode
= 0x3; /* ECKD */
580 if ((basepriv
->rdc_data
.cu_type
== 0x2105 ||
581 basepriv
->rdc_data
.cu_type
== 0x2107 ||
582 basepriv
->rdc_data
.cu_type
== 0x1750)
583 && !(basepriv
->uses_cdl
&& trk
< 2))
584 dedata
->ga_extended
|= 0x40; /* Regular Data Format Mode */
586 heads
= basepriv
->rdc_data
.trk_per_cyl
;
587 begcyl
= trk
/ heads
;
588 beghead
= trk
% heads
;
589 endcyl
= totrk
/ heads
;
590 endhead
= totrk
% heads
;
592 /* check for sequential prestage - enhance cylinder range */
593 if (dedata
->attributes
.operation
== DASD_SEQ_PRESTAGE
||
594 dedata
->attributes
.operation
== DASD_SEQ_ACCESS
) {
596 if (endcyl
+ basepriv
->attrib
.nr_cyl
< basepriv
->real_cyl
)
597 endcyl
+= basepriv
->attrib
.nr_cyl
;
599 endcyl
= (basepriv
->real_cyl
- 1);
602 set_ch_t(&dedata
->beg_ext
, begcyl
, beghead
);
603 set_ch_t(&dedata
->end_ext
, endcyl
, endhead
);
606 fill_LRE_data(lredata
, trk
, rec_on_trk
, count
, cmd
,
607 basedev
, blksize
, tlf
);
613 static int prefix(struct ccw1
*ccw
, struct PFX_eckd_data
*pfxdata
,
614 unsigned int trk
, unsigned int totrk
, int cmd
,
615 struct dasd_device
*basedev
, struct dasd_device
*startdev
)
617 return prefix_LRE(ccw
, pfxdata
, trk
, totrk
, cmd
, basedev
, startdev
,
622 locate_record(struct ccw1
*ccw
, struct LO_eckd_data
*data
, unsigned int trk
,
623 unsigned int rec_on_trk
, int no_rec
, int cmd
,
624 struct dasd_device
* device
, int reclen
)
626 struct dasd_eckd_private
*private;
630 private = (struct dasd_eckd_private
*) device
->private;
632 DBF_DEV_EVENT(DBF_INFO
, device
,
633 "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d",
634 trk
, rec_on_trk
, no_rec
, cmd
, reclen
);
636 ccw
->cmd_code
= DASD_ECKD_CCW_LOCATE_RECORD
;
639 ccw
->cda
= (__u32
) __pa(data
);
641 memset(data
, 0, sizeof(struct LO_eckd_data
));
644 switch (private->rdc_data
.dev_type
) {
646 dn
= ceil_quot(reclen
+ 6, 232);
647 d
= 9 + ceil_quot(reclen
+ 6 * (dn
+ 1), 34);
648 sector
= (49 + (rec_on_trk
- 1) * (10 + d
)) / 8;
651 d
= 7 + ceil_quot(reclen
+ 12, 32);
652 sector
= (39 + (rec_on_trk
- 1) * (8 + d
)) / 7;
656 data
->sector
= sector
;
657 data
->count
= no_rec
;
659 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS
:
660 data
->operation
.orientation
= 0x3;
661 data
->operation
.operation
= 0x03;
663 case DASD_ECKD_CCW_READ_HOME_ADDRESS
:
664 data
->operation
.orientation
= 0x3;
665 data
->operation
.operation
= 0x16;
667 case DASD_ECKD_CCW_WRITE_RECORD_ZERO
:
668 data
->operation
.orientation
= 0x1;
669 data
->operation
.operation
= 0x03;
672 case DASD_ECKD_CCW_READ_RECORD_ZERO
:
673 data
->operation
.orientation
= 0x3;
674 data
->operation
.operation
= 0x16;
677 case DASD_ECKD_CCW_WRITE
:
678 case DASD_ECKD_CCW_WRITE_MT
:
679 case DASD_ECKD_CCW_WRITE_KD
:
680 case DASD_ECKD_CCW_WRITE_KD_MT
:
681 data
->auxiliary
.last_bytes_used
= 0x1;
682 data
->length
= reclen
;
683 data
->operation
.operation
= 0x01;
685 case DASD_ECKD_CCW_WRITE_CKD
:
686 case DASD_ECKD_CCW_WRITE_CKD_MT
:
687 data
->auxiliary
.last_bytes_used
= 0x1;
688 data
->length
= reclen
;
689 data
->operation
.operation
= 0x03;
691 case DASD_ECKD_CCW_READ
:
692 case DASD_ECKD_CCW_READ_MT
:
693 case DASD_ECKD_CCW_READ_KD
:
694 case DASD_ECKD_CCW_READ_KD_MT
:
695 data
->auxiliary
.last_bytes_used
= 0x1;
696 data
->length
= reclen
;
697 data
->operation
.operation
= 0x06;
699 case DASD_ECKD_CCW_READ_CKD
:
700 case DASD_ECKD_CCW_READ_CKD_MT
:
701 data
->auxiliary
.last_bytes_used
= 0x1;
702 data
->length
= reclen
;
703 data
->operation
.operation
= 0x16;
705 case DASD_ECKD_CCW_READ_COUNT
:
706 data
->operation
.operation
= 0x06;
708 case DASD_ECKD_CCW_ERASE
:
709 data
->length
= reclen
;
710 data
->auxiliary
.last_bytes_used
= 0x1;
711 data
->operation
.operation
= 0x0b;
714 DBF_DEV_EVENT(DBF_ERR
, device
, "unknown locate record "
717 set_ch_t(&data
->seek_addr
,
718 trk
/ private->rdc_data
.trk_per_cyl
,
719 trk
% private->rdc_data
.trk_per_cyl
);
720 data
->search_arg
.cyl
= data
->seek_addr
.cyl
;
721 data
->search_arg
.head
= data
->seek_addr
.head
;
722 data
->search_arg
.record
= rec_on_trk
;
726 * Returns 1 if the block is one of the special blocks that needs
727 * to get read/written with the KD variant of the command.
728 * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and
729 * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT.
730 * Luckily the KD variants differ only by one bit (0x08) from the
731 * normal variant. So don't wonder about code like:
732 * if (dasd_eckd_cdl_special(blk_per_trk, recid))
733 * ccw->cmd_code |= 0x8;
736 dasd_eckd_cdl_special(int blk_per_trk
, int recid
)
740 if (recid
< blk_per_trk
)
742 if (recid
< 2 * blk_per_trk
)
748 * Returns the record size for the special blocks of the cdl format.
749 * Only returns something useful if dasd_eckd_cdl_special is true
753 dasd_eckd_cdl_reclen(int recid
)
756 return sizes_trk0
[recid
];
759 /* create unique id from private structure. */
760 static void create_uid(struct dasd_eckd_private
*private)
763 struct dasd_uid
*uid
;
766 memset(uid
, 0, sizeof(struct dasd_uid
));
767 memcpy(uid
->vendor
, private->ned
->HDA_manufacturer
,
768 sizeof(uid
->vendor
) - 1);
769 EBCASC(uid
->vendor
, sizeof(uid
->vendor
) - 1);
770 memcpy(uid
->serial
, private->ned
->HDA_location
,
771 sizeof(uid
->serial
) - 1);
772 EBCASC(uid
->serial
, sizeof(uid
->serial
) - 1);
773 uid
->ssid
= private->gneq
->subsystemID
;
774 uid
->real_unit_addr
= private->ned
->unit_addr
;
776 uid
->type
= private->sneq
->sua_flags
;
777 if (uid
->type
== UA_BASE_PAV_ALIAS
)
778 uid
->base_unit_addr
= private->sneq
->base_unit_addr
;
780 uid
->type
= UA_BASE_DEVICE
;
782 if (private->vdsneq
) {
783 for (count
= 0; count
< 16; count
++) {
784 sprintf(uid
->vduit
+2*count
, "%02x",
785 private->vdsneq
->uit
[count
]);
791 * Generate device unique id that specifies the physical device.
793 static int dasd_eckd_generate_uid(struct dasd_device
*device
)
795 struct dasd_eckd_private
*private;
798 private = (struct dasd_eckd_private
*) device
->private;
801 if (!private->ned
|| !private->gneq
)
803 spin_lock_irqsave(get_ccwdev_lock(device
->cdev
), flags
);
805 spin_unlock_irqrestore(get_ccwdev_lock(device
->cdev
), flags
);
809 static int dasd_eckd_get_uid(struct dasd_device
*device
, struct dasd_uid
*uid
)
811 struct dasd_eckd_private
*private;
814 if (device
->private) {
815 private = (struct dasd_eckd_private
*)device
->private;
816 spin_lock_irqsave(get_ccwdev_lock(device
->cdev
), flags
);
818 spin_unlock_irqrestore(get_ccwdev_lock(device
->cdev
), flags
);
825 * compare device UID with data of a given dasd_eckd_private structure
828 static int dasd_eckd_compare_path_uid(struct dasd_device
*device
,
829 struct dasd_eckd_private
*private)
831 struct dasd_uid device_uid
;
834 dasd_eckd_get_uid(device
, &device_uid
);
836 return memcmp(&device_uid
, &private->uid
, sizeof(struct dasd_uid
));
839 static void dasd_eckd_fill_rcd_cqr(struct dasd_device
*device
,
840 struct dasd_ccw_req
*cqr
,
846 * buffer has to start with EBCDIC "V1.0" to show
847 * support for virtual device SNEQ
849 rcd_buffer
[0] = 0xE5;
850 rcd_buffer
[1] = 0xF1;
851 rcd_buffer
[2] = 0x4B;
852 rcd_buffer
[3] = 0xF0;
855 ccw
->cmd_code
= DASD_ECKD_CCW_RCD
;
857 ccw
->cda
= (__u32
)(addr_t
)rcd_buffer
;
858 ccw
->count
= DASD_ECKD_RCD_DATA_SIZE
;
859 cqr
->magic
= DASD_ECKD_MAGIC
;
861 cqr
->startdev
= device
;
862 cqr
->memdev
= device
;
864 cqr
->expires
= 10*HZ
;
867 cqr
->buildclk
= get_tod_clock();
868 cqr
->status
= DASD_CQR_FILLED
;
869 set_bit(DASD_CQR_VERIFY_PATH
, &cqr
->flags
);
873 * Wakeup helper for read_conf
874 * if the cqr is not done and needs some error recovery
875 * the buffer has to be re-initialized with the EBCDIC "V1.0"
876 * to show support for virtual device SNEQ
878 static void read_conf_cb(struct dasd_ccw_req
*cqr
, void *data
)
883 if (cqr
->status
!= DASD_CQR_DONE
) {
885 rcd_buffer
= (__u8
*)((addr_t
) ccw
->cda
);
886 memset(rcd_buffer
, 0, sizeof(*rcd_buffer
));
888 rcd_buffer
[0] = 0xE5;
889 rcd_buffer
[1] = 0xF1;
890 rcd_buffer
[2] = 0x4B;
891 rcd_buffer
[3] = 0xF0;
893 dasd_wakeup_cb(cqr
, data
);
896 static int dasd_eckd_read_conf_immediately(struct dasd_device
*device
,
897 struct dasd_ccw_req
*cqr
,
904 * sanity check: scan for RCD command in extended SenseID data
905 * some devices do not support RCD
907 ciw
= ccw_device_get_ciw(device
->cdev
, CIW_TYPE_RCD
);
908 if (!ciw
|| ciw
->cmd
!= DASD_ECKD_CCW_RCD
)
911 dasd_eckd_fill_rcd_cqr(device
, cqr
, rcd_buffer
, lpm
);
912 clear_bit(DASD_CQR_FLAGS_USE_ERP
, &cqr
->flags
);
913 set_bit(DASD_CQR_ALLOW_SLOCK
, &cqr
->flags
);
915 cqr
->callback
= read_conf_cb
;
916 rc
= dasd_sleep_on_immediatly(cqr
);
920 static int dasd_eckd_read_conf_lpm(struct dasd_device
*device
,
922 int *rcd_buffer_size
, __u8 lpm
)
925 char *rcd_buf
= NULL
;
927 struct dasd_ccw_req
*cqr
;
930 * sanity check: scan for RCD command in extended SenseID data
931 * some devices do not support RCD
933 ciw
= ccw_device_get_ciw(device
->cdev
, CIW_TYPE_RCD
);
934 if (!ciw
|| ciw
->cmd
!= DASD_ECKD_CCW_RCD
) {
938 rcd_buf
= kzalloc(DASD_ECKD_RCD_DATA_SIZE
, GFP_KERNEL
| GFP_DMA
);
943 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1 /* RCD */,
944 0, /* use rcd_buf as data ara */
947 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
948 "Could not allocate RCD request");
952 dasd_eckd_fill_rcd_cqr(device
, cqr
, rcd_buf
, lpm
);
953 cqr
->callback
= read_conf_cb
;
954 ret
= dasd_sleep_on(cqr
);
956 * on success we update the user input parms
958 dasd_sfree_request(cqr
, cqr
->memdev
);
962 *rcd_buffer_size
= DASD_ECKD_RCD_DATA_SIZE
;
963 *rcd_buffer
= rcd_buf
;
968 *rcd_buffer_size
= 0;
972 static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private
*private)
975 struct dasd_sneq
*sneq
;
979 private->sneq
= NULL
;
980 private->vdsneq
= NULL
;
981 private->gneq
= NULL
;
982 count
= private->conf_len
/ sizeof(struct dasd_sneq
);
983 sneq
= (struct dasd_sneq
*)private->conf_data
;
984 for (i
= 0; i
< count
; ++i
) {
985 if (sneq
->flags
.identifier
== 1 && sneq
->format
== 1)
986 private->sneq
= sneq
;
987 else if (sneq
->flags
.identifier
== 1 && sneq
->format
== 4)
988 private->vdsneq
= (struct vd_sneq
*)sneq
;
989 else if (sneq
->flags
.identifier
== 2)
990 private->gneq
= (struct dasd_gneq
*)sneq
;
991 else if (sneq
->flags
.identifier
== 3 && sneq
->res1
== 1)
992 private->ned
= (struct dasd_ned
*)sneq
;
995 if (!private->ned
|| !private->gneq
) {
997 private->sneq
= NULL
;
998 private->vdsneq
= NULL
;
999 private->gneq
= NULL
;
1006 static unsigned char dasd_eckd_path_access(void *conf_data
, int conf_len
)
1008 struct dasd_gneq
*gneq
;
1009 int i
, count
, found
;
1011 count
= conf_len
/ sizeof(*gneq
);
1012 gneq
= (struct dasd_gneq
*)conf_data
;
1014 for (i
= 0; i
< count
; ++i
) {
1015 if (gneq
->flags
.identifier
== 2) {
1022 return ((char *)gneq
)[18] & 0x07;
1027 static int dasd_eckd_read_conf(struct dasd_device
*device
)
1030 int conf_len
, conf_data_saved
;
1033 struct dasd_eckd_private
*private, path_private
;
1034 struct dasd_path
*path_data
;
1035 struct dasd_uid
*uid
;
1036 char print_path_uid
[60], print_device_uid
[60];
1038 private = (struct dasd_eckd_private
*) device
->private;
1039 path_data
= &device
->path_data
;
1040 opm
= ccw_device_get_path_mask(device
->cdev
);
1041 conf_data_saved
= 0;
1043 /* get configuration data per operational path */
1044 for (lpm
= 0x80; lpm
; lpm
>>= 1) {
1047 rc
= dasd_eckd_read_conf_lpm(device
, &conf_data
,
1049 if (rc
&& rc
!= -EOPNOTSUPP
) { /* -EOPNOTSUPP is ok */
1050 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
,
1051 "Read configuration data returned "
1055 if (conf_data
== NULL
) {
1056 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
, "%s",
1057 "No configuration data "
1059 /* no further analysis possible */
1060 path_data
->opm
|= lpm
;
1061 continue; /* no error */
1063 /* save first valid configuration data */
1064 if (!conf_data_saved
) {
1065 kfree(private->conf_data
);
1066 private->conf_data
= conf_data
;
1067 private->conf_len
= conf_len
;
1068 if (dasd_eckd_identify_conf_parts(private)) {
1069 private->conf_data
= NULL
;
1070 private->conf_len
= 0;
1075 * build device UID that other path data
1076 * can be compared to it
1078 dasd_eckd_generate_uid(device
);
1081 path_private
.conf_data
= conf_data
;
1082 path_private
.conf_len
= DASD_ECKD_RCD_DATA_SIZE
;
1083 if (dasd_eckd_identify_conf_parts(
1085 path_private
.conf_data
= NULL
;
1086 path_private
.conf_len
= 0;
1091 if (dasd_eckd_compare_path_uid(
1092 device
, &path_private
)) {
1093 uid
= &path_private
.uid
;
1094 if (strlen(uid
->vduit
) > 0)
1095 snprintf(print_path_uid
,
1096 sizeof(print_path_uid
),
1097 "%s.%s.%04x.%02x.%s",
1098 uid
->vendor
, uid
->serial
,
1099 uid
->ssid
, uid
->real_unit_addr
,
1102 snprintf(print_path_uid
,
1103 sizeof(print_path_uid
),
1105 uid
->vendor
, uid
->serial
,
1107 uid
->real_unit_addr
);
1108 uid
= &private->uid
;
1109 if (strlen(uid
->vduit
) > 0)
1110 snprintf(print_device_uid
,
1111 sizeof(print_device_uid
),
1112 "%s.%s.%04x.%02x.%s",
1113 uid
->vendor
, uid
->serial
,
1114 uid
->ssid
, uid
->real_unit_addr
,
1117 snprintf(print_device_uid
,
1118 sizeof(print_device_uid
),
1120 uid
->vendor
, uid
->serial
,
1122 uid
->real_unit_addr
);
1123 dev_err(&device
->cdev
->dev
,
1124 "Not all channel paths lead to "
1125 "the same device, path %02X leads to "
1126 "device %s instead of %s\n", lpm
,
1127 print_path_uid
, print_device_uid
);
1132 path_private
.conf_data
= NULL
;
1133 path_private
.conf_len
= 0;
1135 switch (dasd_eckd_path_access(conf_data
, conf_len
)) {
1137 path_data
->npm
|= lpm
;
1140 path_data
->ppm
|= lpm
;
1143 path_data
->opm
|= lpm
;
1145 if (conf_data
!= private->conf_data
)
1152 static int verify_fcx_max_data(struct dasd_device
*device
, __u8 lpm
)
1154 struct dasd_eckd_private
*private;
1158 private = (struct dasd_eckd_private
*) device
->private;
1159 if (private->fcx_max_data
) {
1160 mdc
= ccw_device_get_mdc(device
->cdev
, lpm
);
1162 dev_warn(&device
->cdev
->dev
,
1163 "Detecting the maximum data size for zHPF "
1164 "requests failed (rc=%d) for a new path %x\n",
1168 fcx_max_data
= mdc
* FCX_MAX_DATA_FACTOR
;
1169 if (fcx_max_data
< private->fcx_max_data
) {
1170 dev_warn(&device
->cdev
->dev
,
1171 "The maximum data size for zHPF requests %u "
1172 "on a new path %x is below the active maximum "
1173 "%u\n", fcx_max_data
, lpm
,
1174 private->fcx_max_data
);
1181 static int rebuild_device_uid(struct dasd_device
*device
,
1182 struct path_verification_work_data
*data
)
1184 struct dasd_eckd_private
*private;
1185 struct dasd_path
*path_data
;
1190 private = (struct dasd_eckd_private
*) device
->private;
1191 path_data
= &device
->path_data
;
1192 opm
= device
->path_data
.opm
;
1194 for (lpm
= 0x80; lpm
; lpm
>>= 1) {
1197 memset(&data
->rcd_buffer
, 0, sizeof(data
->rcd_buffer
));
1198 memset(&data
->cqr
, 0, sizeof(data
->cqr
));
1199 data
->cqr
.cpaddr
= &data
->ccw
;
1200 rc
= dasd_eckd_read_conf_immediately(device
, &data
->cqr
,
1205 if (rc
== -EOPNOTSUPP
) /* -EOPNOTSUPP is ok */
1207 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
,
1208 "Read configuration data "
1209 "returned error %d", rc
);
1212 memcpy(private->conf_data
, data
->rcd_buffer
,
1213 DASD_ECKD_RCD_DATA_SIZE
);
1214 if (dasd_eckd_identify_conf_parts(private)) {
1216 } else /* first valid path is enough */
1221 rc
= dasd_eckd_generate_uid(device
);
1226 static void do_path_verification_work(struct work_struct
*work
)
1228 struct path_verification_work_data
*data
;
1229 struct dasd_device
*device
;
1230 struct dasd_eckd_private path_private
;
1231 struct dasd_uid
*uid
;
1232 __u8 path_rcd_buf
[DASD_ECKD_RCD_DATA_SIZE
];
1233 __u8 lpm
, opm
, npm
, ppm
, epm
;
1234 unsigned long flags
;
1238 data
= container_of(work
, struct path_verification_work_data
, worker
);
1239 device
= data
->device
;
1241 /* delay path verification until device was resumed */
1242 if (test_bit(DASD_FLAG_SUSPENDED
, &device
->flags
)) {
1243 schedule_work(work
);
1251 for (lpm
= 0x80; lpm
; lpm
>>= 1) {
1252 if (!(lpm
& data
->tbvpm
))
1254 memset(&data
->rcd_buffer
, 0, sizeof(data
->rcd_buffer
));
1255 memset(&data
->cqr
, 0, sizeof(data
->cqr
));
1256 data
->cqr
.cpaddr
= &data
->ccw
;
1257 rc
= dasd_eckd_read_conf_immediately(device
, &data
->cqr
,
1261 switch (dasd_eckd_path_access(data
->rcd_buffer
,
1262 DASD_ECKD_RCD_DATA_SIZE
)
1272 } else if (rc
== -EOPNOTSUPP
) {
1273 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
, "%s",
1274 "path verification: No configuration "
1277 } else if (rc
== -EAGAIN
) {
1278 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
, "%s",
1279 "path verification: device is stopped,"
1280 " try again later");
1283 dev_warn(&device
->cdev
->dev
,
1284 "Reading device feature codes failed "
1285 "(rc=%d) for new path %x\n", rc
, lpm
);
1288 if (verify_fcx_max_data(device
, lpm
)) {
1296 * save conf_data for comparison after
1297 * rebuild_device_uid may have changed
1300 memcpy(&path_rcd_buf
, data
->rcd_buffer
,
1301 DASD_ECKD_RCD_DATA_SIZE
);
1302 path_private
.conf_data
= (void *) &path_rcd_buf
;
1303 path_private
.conf_len
= DASD_ECKD_RCD_DATA_SIZE
;
1304 if (dasd_eckd_identify_conf_parts(&path_private
)) {
1305 path_private
.conf_data
= NULL
;
1306 path_private
.conf_len
= 0;
1311 * compare path UID with device UID only if at least
1312 * one valid path is left
1313 * in other case the device UID may have changed and
1314 * the first working path UID will be used as device UID
1316 if (device
->path_data
.opm
&&
1317 dasd_eckd_compare_path_uid(device
, &path_private
)) {
1319 * the comparison was not successful
1320 * rebuild the device UID with at least one
1321 * known path in case a z/VM hyperswap command
1322 * has changed the device
1324 * after this compare again
1326 * if either the rebuild or the recompare fails
1327 * the path can not be used
1329 if (rebuild_device_uid(device
, data
) ||
1330 dasd_eckd_compare_path_uid(
1331 device
, &path_private
)) {
1332 uid
= &path_private
.uid
;
1333 if (strlen(uid
->vduit
) > 0)
1334 snprintf(print_uid
, sizeof(print_uid
),
1335 "%s.%s.%04x.%02x.%s",
1336 uid
->vendor
, uid
->serial
,
1337 uid
->ssid
, uid
->real_unit_addr
,
1340 snprintf(print_uid
, sizeof(print_uid
),
1342 uid
->vendor
, uid
->serial
,
1344 uid
->real_unit_addr
);
1345 dev_err(&device
->cdev
->dev
,
1346 "The newly added channel path %02X "
1347 "will not be used because it leads "
1348 "to a different device %s\n",
1358 * There is a small chance that a path is lost again between
1359 * above path verification and the following modification of
1360 * the device opm mask. We could avoid that race here by using
1361 * yet another path mask, but we rather deal with this unlikely
1362 * situation in dasd_start_IO.
1364 spin_lock_irqsave(get_ccwdev_lock(device
->cdev
), flags
);
1365 if (!device
->path_data
.opm
&& opm
) {
1366 device
->path_data
.opm
= opm
;
1367 dasd_generic_path_operational(device
);
1369 device
->path_data
.opm
|= opm
;
1370 device
->path_data
.npm
|= npm
;
1371 device
->path_data
.ppm
|= ppm
;
1372 device
->path_data
.tbvpm
|= epm
;
1373 spin_unlock_irqrestore(get_ccwdev_lock(device
->cdev
), flags
);
1376 dasd_put_device(device
);
1378 mutex_unlock(&dasd_path_verification_mutex
);
1383 static int dasd_eckd_verify_path(struct dasd_device
*device
, __u8 lpm
)
1385 struct path_verification_work_data
*data
;
1387 data
= kmalloc(sizeof(*data
), GFP_ATOMIC
| GFP_DMA
);
1389 if (mutex_trylock(&dasd_path_verification_mutex
)) {
1390 data
= path_verification_worker
;
1395 memset(data
, 0, sizeof(*data
));
1398 INIT_WORK(&data
->worker
, do_path_verification_work
);
1399 dasd_get_device(device
);
1400 data
->device
= device
;
1402 schedule_work(&data
->worker
);
1406 static int dasd_eckd_read_features(struct dasd_device
*device
)
1408 struct dasd_psf_prssd_data
*prssdp
;
1409 struct dasd_rssd_features
*features
;
1410 struct dasd_ccw_req
*cqr
;
1413 struct dasd_eckd_private
*private;
1415 private = (struct dasd_eckd_private
*) device
->private;
1416 memset(&private->features
, 0, sizeof(struct dasd_rssd_features
));
1417 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1 /* PSF */ + 1 /* RSSD */,
1418 (sizeof(struct dasd_psf_prssd_data
) +
1419 sizeof(struct dasd_rssd_features
)),
1422 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
, "%s", "Could not "
1423 "allocate initialization request");
1424 return PTR_ERR(cqr
);
1426 cqr
->startdev
= device
;
1427 cqr
->memdev
= device
;
1430 cqr
->expires
= 10 * HZ
;
1432 /* Prepare for Read Subsystem Data */
1433 prssdp
= (struct dasd_psf_prssd_data
*) cqr
->data
;
1434 memset(prssdp
, 0, sizeof(struct dasd_psf_prssd_data
));
1435 prssdp
->order
= PSF_ORDER_PRSSD
;
1436 prssdp
->suborder
= 0x41; /* Read Feature Codes */
1437 /* all other bytes of prssdp must be zero */
1440 ccw
->cmd_code
= DASD_ECKD_CCW_PSF
;
1441 ccw
->count
= sizeof(struct dasd_psf_prssd_data
);
1442 ccw
->flags
|= CCW_FLAG_CC
;
1443 ccw
->cda
= (__u32
)(addr_t
) prssdp
;
1445 /* Read Subsystem Data - feature codes */
1446 features
= (struct dasd_rssd_features
*) (prssdp
+ 1);
1447 memset(features
, 0, sizeof(struct dasd_rssd_features
));
1450 ccw
->cmd_code
= DASD_ECKD_CCW_RSSD
;
1451 ccw
->count
= sizeof(struct dasd_rssd_features
);
1452 ccw
->cda
= (__u32
)(addr_t
) features
;
1454 cqr
->buildclk
= get_tod_clock();
1455 cqr
->status
= DASD_CQR_FILLED
;
1456 rc
= dasd_sleep_on(cqr
);
1458 prssdp
= (struct dasd_psf_prssd_data
*) cqr
->data
;
1459 features
= (struct dasd_rssd_features
*) (prssdp
+ 1);
1460 memcpy(&private->features
, features
,
1461 sizeof(struct dasd_rssd_features
));
1463 dev_warn(&device
->cdev
->dev
, "Reading device feature codes"
1464 " failed with rc=%d\n", rc
);
1465 dasd_sfree_request(cqr
, cqr
->memdev
);
1471 * Build CP for Perform Subsystem Function - SSC.
1473 static struct dasd_ccw_req
*dasd_eckd_build_psf_ssc(struct dasd_device
*device
,
1476 struct dasd_ccw_req
*cqr
;
1477 struct dasd_psf_ssc_data
*psf_ssc_data
;
1480 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1 /* PSF */ ,
1481 sizeof(struct dasd_psf_ssc_data
),
1485 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
1486 "Could not allocate PSF-SSC request");
1489 psf_ssc_data
= (struct dasd_psf_ssc_data
*)cqr
->data
;
1490 psf_ssc_data
->order
= PSF_ORDER_SSC
;
1491 psf_ssc_data
->suborder
= 0xc0;
1493 psf_ssc_data
->suborder
|= 0x08;
1494 psf_ssc_data
->reserved
[0] = 0x88;
1497 ccw
->cmd_code
= DASD_ECKD_CCW_PSF
;
1498 ccw
->cda
= (__u32
)(addr_t
)psf_ssc_data
;
1501 cqr
->startdev
= device
;
1502 cqr
->memdev
= device
;
1505 cqr
->expires
= 10*HZ
;
1506 cqr
->buildclk
= get_tod_clock();
1507 cqr
->status
= DASD_CQR_FILLED
;
1512 * Perform Subsystem Function.
1513 * It is necessary to trigger CIO for channel revalidation since this
1514 * call might change behaviour of DASD devices.
1517 dasd_eckd_psf_ssc(struct dasd_device
*device
, int enable_pav
,
1518 unsigned long flags
)
1520 struct dasd_ccw_req
*cqr
;
1523 cqr
= dasd_eckd_build_psf_ssc(device
, enable_pav
);
1525 return PTR_ERR(cqr
);
1528 * set flags e.g. turn on failfast, to prevent blocking
1529 * the calling function should handle failed requests
1531 cqr
->flags
|= flags
;
1533 rc
= dasd_sleep_on(cqr
);
1535 /* trigger CIO to reprobe devices */
1536 css_schedule_reprobe();
1537 else if (cqr
->intrc
== -EAGAIN
)
1540 dasd_sfree_request(cqr
, cqr
->memdev
);
1545 * Valide storage server of current device.
1547 static int dasd_eckd_validate_server(struct dasd_device
*device
,
1548 unsigned long flags
)
1551 struct dasd_eckd_private
*private;
1554 private = (struct dasd_eckd_private
*) device
->private;
1555 if (private->uid
.type
== UA_BASE_PAV_ALIAS
||
1556 private->uid
.type
== UA_HYPER_PAV_ALIAS
)
1558 if (dasd_nopav
|| MACHINE_IS_VM
)
1562 rc
= dasd_eckd_psf_ssc(device
, enable_pav
, flags
);
1564 /* may be requested feature is not available on server,
1565 * therefore just report error and go ahead */
1566 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
, "PSF-SSC for SSID %04x "
1567 "returned rc=%d", private->uid
.ssid
, rc
);
1572 * worker to do a validate server in case of a lost pathgroup
1574 static void dasd_eckd_do_validate_server(struct work_struct
*work
)
1576 struct dasd_device
*device
= container_of(work
, struct dasd_device
,
1578 unsigned long flags
= 0;
1580 set_bit(DASD_CQR_FLAGS_FAILFAST
, &flags
);
1581 if (dasd_eckd_validate_server(device
, flags
)
1583 /* schedule worker again if failed */
1584 schedule_work(&device
->kick_validate
);
1588 dasd_put_device(device
);
1591 static void dasd_eckd_kick_validate_server(struct dasd_device
*device
)
1593 dasd_get_device(device
);
1594 /* exit if device not online or in offline processing */
1595 if (test_bit(DASD_FLAG_OFFLINE
, &device
->flags
) ||
1596 device
->state
< DASD_STATE_ONLINE
) {
1597 dasd_put_device(device
);
1600 /* queue call to do_validate_server to the kernel event daemon. */
1601 schedule_work(&device
->kick_validate
);
1604 static u32
get_fcx_max_data(struct dasd_device
*device
)
1606 #if defined(CONFIG_64BIT)
1608 int fcx_in_css
, fcx_in_gneq
, fcx_in_features
;
1609 struct dasd_eckd_private
*private;
1613 /* is transport mode supported? */
1614 private = (struct dasd_eckd_private
*) device
->private;
1615 fcx_in_css
= css_general_characteristics
.fcx
;
1616 fcx_in_gneq
= private->gneq
->reserved2
[7] & 0x04;
1617 fcx_in_features
= private->features
.feature
[40] & 0x80;
1618 tpm
= fcx_in_css
&& fcx_in_gneq
&& fcx_in_features
;
1623 mdc
= ccw_device_get_mdc(device
->cdev
, 0);
1625 dev_warn(&device
->cdev
->dev
, "Detecting the maximum supported"
1626 " data size for zHPF requests failed\n");
1629 return mdc
* FCX_MAX_DATA_FACTOR
;
1636 * Check device characteristics.
1637 * If the device is accessible using ECKD discipline, the device is enabled.
1640 dasd_eckd_check_characteristics(struct dasd_device
*device
)
1642 struct dasd_eckd_private
*private;
1643 struct dasd_block
*block
;
1644 struct dasd_uid temp_uid
;
1647 unsigned long value
;
1649 /* setup work queue for validate server*/
1650 INIT_WORK(&device
->kick_validate
, dasd_eckd_do_validate_server
);
1652 if (!ccw_device_is_pathgroup(device
->cdev
)) {
1653 dev_warn(&device
->cdev
->dev
,
1654 "A channel path group could not be established\n");
1657 if (!ccw_device_is_multipath(device
->cdev
)) {
1658 dev_info(&device
->cdev
->dev
,
1659 "The DASD is not operating in multipath mode\n");
1661 private = (struct dasd_eckd_private
*) device
->private;
1663 private = kzalloc(sizeof(*private), GFP_KERNEL
| GFP_DMA
);
1665 dev_warn(&device
->cdev
->dev
,
1666 "Allocating memory for private DASD data "
1670 device
->private = (void *) private;
1672 memset(private, 0, sizeof(*private));
1674 /* Invalidate status of initial analysis. */
1675 private->init_cqr_status
= -1;
1676 /* Set default cache operations. */
1677 private->attrib
.operation
= DASD_NORMAL_CACHE
;
1678 private->attrib
.nr_cyl
= 0;
1680 /* Read Configuration Data */
1681 rc
= dasd_eckd_read_conf(device
);
1685 /* set default timeout */
1686 device
->default_expires
= DASD_EXPIRES
;
1687 /* set default retry count */
1688 device
->default_retries
= DASD_RETRIES
;
1690 if (private->gneq
) {
1692 for (i
= 0; i
< private->gneq
->timeout
.value
; i
++)
1694 value
= value
* private->gneq
->timeout
.number
;
1695 /* do not accept useless values */
1696 if (value
!= 0 && value
<= DASD_EXPIRES_MAX
)
1697 device
->default_expires
= value
;
1700 dasd_eckd_get_uid(device
, &temp_uid
);
1701 if (temp_uid
.type
== UA_BASE_DEVICE
) {
1702 block
= dasd_alloc_block();
1703 if (IS_ERR(block
)) {
1704 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
, "%s",
1705 "could not allocate dasd "
1707 rc
= PTR_ERR(block
);
1710 device
->block
= block
;
1711 block
->base
= device
;
1714 /* register lcu with alias handling, enable PAV */
1715 rc
= dasd_alias_make_device_known_to_lcu(device
);
1719 dasd_eckd_validate_server(device
, 0);
1721 /* device may report different configuration data after LCU setup */
1722 rc
= dasd_eckd_read_conf(device
);
1726 /* Read Feature Codes */
1727 dasd_eckd_read_features(device
);
1729 /* Read Device Characteristics */
1730 rc
= dasd_generic_read_dev_chars(device
, DASD_ECKD_MAGIC
,
1731 &private->rdc_data
, 64);
1733 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
,
1734 "Read device characteristic failed, rc=%d", rc
);
1738 if ((device
->features
& DASD_FEATURE_USERAW
) &&
1739 !(private->rdc_data
.facilities
.RT_in_LR
)) {
1740 dev_err(&device
->cdev
->dev
, "The storage server does not "
1741 "support raw-track access\n");
1746 /* find the valid cylinder size */
1747 if (private->rdc_data
.no_cyl
== LV_COMPAT_CYL
&&
1748 private->rdc_data
.long_no_cyl
)
1749 private->real_cyl
= private->rdc_data
.long_no_cyl
;
1751 private->real_cyl
= private->rdc_data
.no_cyl
;
1753 private->fcx_max_data
= get_fcx_max_data(device
);
1755 readonly
= dasd_device_is_ro(device
);
1757 set_bit(DASD_FLAG_DEVICE_RO
, &device
->flags
);
1759 dev_info(&device
->cdev
->dev
, "New DASD %04X/%02X (CU %04X/%02X) "
1760 "with %d cylinders, %d heads, %d sectors%s\n",
1761 private->rdc_data
.dev_type
,
1762 private->rdc_data
.dev_model
,
1763 private->rdc_data
.cu_type
,
1764 private->rdc_data
.cu_model
.model
,
1766 private->rdc_data
.trk_per_cyl
,
1767 private->rdc_data
.sec_per_trk
,
1768 readonly
? ", read-only device" : "");
1772 dasd_alias_disconnect_device_from_lcu(device
);
1774 dasd_free_block(device
->block
);
1775 device
->block
= NULL
;
1777 kfree(private->conf_data
);
1778 kfree(device
->private);
1779 device
->private = NULL
;
1783 static void dasd_eckd_uncheck_device(struct dasd_device
*device
)
1785 struct dasd_eckd_private
*private;
1787 private = (struct dasd_eckd_private
*) device
->private;
1788 dasd_alias_disconnect_device_from_lcu(device
);
1789 private->ned
= NULL
;
1790 private->sneq
= NULL
;
1791 private->vdsneq
= NULL
;
1792 private->gneq
= NULL
;
1793 private->conf_len
= 0;
1794 kfree(private->conf_data
);
1795 private->conf_data
= NULL
;
1798 static struct dasd_ccw_req
*
1799 dasd_eckd_analysis_ccw(struct dasd_device
*device
)
1801 struct dasd_eckd_private
*private;
1802 struct eckd_count
*count_data
;
1803 struct LO_eckd_data
*LO_data
;
1804 struct dasd_ccw_req
*cqr
;
1806 int cplength
, datasize
;
1809 private = (struct dasd_eckd_private
*) device
->private;
1812 datasize
= sizeof(struct DE_eckd_data
) + 2*sizeof(struct LO_eckd_data
);
1813 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, cplength
, datasize
, device
);
1817 /* Define extent for the first 3 tracks. */
1818 define_extent(ccw
++, cqr
->data
, 0, 2,
1819 DASD_ECKD_CCW_READ_COUNT
, device
);
1820 LO_data
= cqr
->data
+ sizeof(struct DE_eckd_data
);
1821 /* Locate record for the first 4 records on track 0. */
1822 ccw
[-1].flags
|= CCW_FLAG_CC
;
1823 locate_record(ccw
++, LO_data
++, 0, 0, 4,
1824 DASD_ECKD_CCW_READ_COUNT
, device
, 0);
1826 count_data
= private->count_area
;
1827 for (i
= 0; i
< 4; i
++) {
1828 ccw
[-1].flags
|= CCW_FLAG_CC
;
1829 ccw
->cmd_code
= DASD_ECKD_CCW_READ_COUNT
;
1832 ccw
->cda
= (__u32
)(addr_t
) count_data
;
1837 /* Locate record for the first record on track 2. */
1838 ccw
[-1].flags
|= CCW_FLAG_CC
;
1839 locate_record(ccw
++, LO_data
++, 2, 0, 1,
1840 DASD_ECKD_CCW_READ_COUNT
, device
, 0);
1841 /* Read count ccw. */
1842 ccw
[-1].flags
|= CCW_FLAG_CC
;
1843 ccw
->cmd_code
= DASD_ECKD_CCW_READ_COUNT
;
1846 ccw
->cda
= (__u32
)(addr_t
) count_data
;
1849 cqr
->startdev
= device
;
1850 cqr
->memdev
= device
;
1852 cqr
->buildclk
= get_tod_clock();
1853 cqr
->status
= DASD_CQR_FILLED
;
1857 /* differentiate between 'no record found' and any other error */
1858 static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req
*init_cqr
)
1861 if (init_cqr
->status
== DASD_CQR_DONE
)
1863 else if (init_cqr
->status
== DASD_CQR_NEED_ERP
||
1864 init_cqr
->status
== DASD_CQR_FAILED
) {
1865 sense
= dasd_get_sense(&init_cqr
->irb
);
1866 if (sense
&& (sense
[1] & SNS1_NO_REC_FOUND
))
1867 return INIT_CQR_UNFORMATTED
;
1869 return INIT_CQR_ERROR
;
1871 return INIT_CQR_ERROR
;
1875 * This is the callback function for the init_analysis cqr. It saves
1876 * the status of the initial analysis ccw before it frees it and kicks
1877 * the device to continue the startup sequence. This will call
1878 * dasd_eckd_do_analysis again (if the devices has not been marked
1879 * for deletion in the meantime).
1881 static void dasd_eckd_analysis_callback(struct dasd_ccw_req
*init_cqr
,
1884 struct dasd_eckd_private
*private;
1885 struct dasd_device
*device
;
1887 device
= init_cqr
->startdev
;
1888 private = (struct dasd_eckd_private
*) device
->private;
1889 private->init_cqr_status
= dasd_eckd_analysis_evaluation(init_cqr
);
1890 dasd_sfree_request(init_cqr
, device
);
1891 dasd_kick_device(device
);
1894 static int dasd_eckd_start_analysis(struct dasd_block
*block
)
1896 struct dasd_ccw_req
*init_cqr
;
1898 init_cqr
= dasd_eckd_analysis_ccw(block
->base
);
1899 if (IS_ERR(init_cqr
))
1900 return PTR_ERR(init_cqr
);
1901 init_cqr
->callback
= dasd_eckd_analysis_callback
;
1902 init_cqr
->callback_data
= NULL
;
1903 init_cqr
->expires
= 5*HZ
;
1904 /* first try without ERP, so we can later handle unformatted
1905 * devices as special case
1907 clear_bit(DASD_CQR_FLAGS_USE_ERP
, &init_cqr
->flags
);
1908 init_cqr
->retries
= 0;
1909 dasd_add_request_head(init_cqr
);
1913 static int dasd_eckd_end_analysis(struct dasd_block
*block
)
1915 struct dasd_device
*device
;
1916 struct dasd_eckd_private
*private;
1917 struct eckd_count
*count_area
;
1918 unsigned int sb
, blk_per_trk
;
1920 struct dasd_ccw_req
*init_cqr
;
1922 device
= block
->base
;
1923 private = (struct dasd_eckd_private
*) device
->private;
1924 status
= private->init_cqr_status
;
1925 private->init_cqr_status
= -1;
1926 if (status
== INIT_CQR_ERROR
) {
1927 /* try again, this time with full ERP */
1928 init_cqr
= dasd_eckd_analysis_ccw(device
);
1929 dasd_sleep_on(init_cqr
);
1930 status
= dasd_eckd_analysis_evaluation(init_cqr
);
1931 dasd_sfree_request(init_cqr
, device
);
1934 if (device
->features
& DASD_FEATURE_USERAW
) {
1935 block
->bp_block
= DASD_RAW_BLOCKSIZE
;
1936 blk_per_trk
= DASD_RAW_BLOCK_PER_TRACK
;
1937 block
->s2b_shift
= 3;
1941 if (status
== INIT_CQR_UNFORMATTED
) {
1942 dev_warn(&device
->cdev
->dev
, "The DASD is not formatted\n");
1943 return -EMEDIUMTYPE
;
1944 } else if (status
== INIT_CQR_ERROR
) {
1945 dev_err(&device
->cdev
->dev
,
1946 "Detecting the DASD disk layout failed because "
1947 "of an I/O error\n");
1951 private->uses_cdl
= 1;
1952 /* Check Track 0 for Compatible Disk Layout */
1954 for (i
= 0; i
< 3; i
++) {
1955 if (private->count_area
[i
].kl
!= 4 ||
1956 private->count_area
[i
].dl
!= dasd_eckd_cdl_reclen(i
) - 4 ||
1957 private->count_area
[i
].cyl
!= 0 ||
1958 private->count_area
[i
].head
!= count_area_head
[i
] ||
1959 private->count_area
[i
].record
!= count_area_rec
[i
]) {
1960 private->uses_cdl
= 0;
1965 count_area
= &private->count_area
[4];
1967 if (private->uses_cdl
== 0) {
1968 for (i
= 0; i
< 5; i
++) {
1969 if ((private->count_area
[i
].kl
!= 0) ||
1970 (private->count_area
[i
].dl
!=
1971 private->count_area
[0].dl
) ||
1972 private->count_area
[i
].cyl
!= 0 ||
1973 private->count_area
[i
].head
!= count_area_head
[i
] ||
1974 private->count_area
[i
].record
!= count_area_rec
[i
])
1978 count_area
= &private->count_area
[0];
1980 if (private->count_area
[3].record
== 1)
1981 dev_warn(&device
->cdev
->dev
,
1982 "Track 0 has no records following the VTOC\n");
1985 if (count_area
!= NULL
&& count_area
->kl
== 0) {
1986 /* we found notthing violating our disk layout */
1987 if (dasd_check_blocksize(count_area
->dl
) == 0)
1988 block
->bp_block
= count_area
->dl
;
1990 if (block
->bp_block
== 0) {
1991 dev_warn(&device
->cdev
->dev
,
1992 "The disk layout of the DASD is not supported\n");
1993 return -EMEDIUMTYPE
;
1995 block
->s2b_shift
= 0; /* bits to shift 512 to get a block */
1996 for (sb
= 512; sb
< block
->bp_block
; sb
= sb
<< 1)
1999 blk_per_trk
= recs_per_track(&private->rdc_data
, 0, block
->bp_block
);
2002 block
->blocks
= (private->real_cyl
*
2003 private->rdc_data
.trk_per_cyl
*
2006 dev_info(&device
->cdev
->dev
,
2007 "DASD with %d KB/block, %d KB total size, %d KB/track, "
2008 "%s\n", (block
->bp_block
>> 10),
2009 ((private->real_cyl
*
2010 private->rdc_data
.trk_per_cyl
*
2011 blk_per_trk
* (block
->bp_block
>> 9)) >> 1),
2012 ((blk_per_trk
* block
->bp_block
) >> 10),
2014 "compatible disk layout" : "linux disk layout");
2019 static int dasd_eckd_do_analysis(struct dasd_block
*block
)
2021 struct dasd_eckd_private
*private;
2023 private = (struct dasd_eckd_private
*) block
->base
->private;
2024 if (private->init_cqr_status
< 0)
2025 return dasd_eckd_start_analysis(block
);
2027 return dasd_eckd_end_analysis(block
);
2030 static int dasd_eckd_basic_to_ready(struct dasd_device
*device
)
2032 return dasd_alias_add_device(device
);
2035 static int dasd_eckd_online_to_ready(struct dasd_device
*device
)
2037 cancel_work_sync(&device
->reload_device
);
2038 cancel_work_sync(&device
->kick_validate
);
2042 static int dasd_eckd_ready_to_basic(struct dasd_device
*device
)
2044 return dasd_alias_remove_device(device
);
2048 dasd_eckd_fill_geometry(struct dasd_block
*block
, struct hd_geometry
*geo
)
2050 struct dasd_eckd_private
*private;
2052 private = (struct dasd_eckd_private
*) block
->base
->private;
2053 if (dasd_check_blocksize(block
->bp_block
) == 0) {
2054 geo
->sectors
= recs_per_track(&private->rdc_data
,
2055 0, block
->bp_block
);
2057 geo
->cylinders
= private->rdc_data
.no_cyl
;
2058 geo
->heads
= private->rdc_data
.trk_per_cyl
;
2062 static struct dasd_ccw_req
*
2063 dasd_eckd_build_format(struct dasd_device
*base
,
2064 struct format_data_t
*fdata
)
2066 struct dasd_eckd_private
*base_priv
;
2067 struct dasd_eckd_private
*start_priv
;
2068 struct dasd_device
*startdev
;
2069 struct dasd_ccw_req
*fcp
;
2070 struct eckd_count
*ect
;
2071 struct ch_t address
;
2075 int cplength
, datasize
;
2082 startdev
= dasd_alias_get_start_dev(base
);
2086 start_priv
= (struct dasd_eckd_private
*) startdev
->private;
2087 base_priv
= (struct dasd_eckd_private
*) base
->private;
2089 rpt
= recs_per_track(&base_priv
->rdc_data
, 0, fdata
->blksize
);
2091 nr_tracks
= fdata
->stop_unit
- fdata
->start_unit
+ 1;
2094 * fdata->intensity is a bit string that tells us what to do:
2095 * Bit 0: write record zero
2096 * Bit 1: write home address, currently not supported
2097 * Bit 2: invalidate tracks
2098 * Bit 3: use OS/390 compatible disk layout (cdl)
2099 * Bit 4: do not allow storage subsystem to modify record zero
2100 * Only some bit combinations do make sense.
2102 if (fdata
->intensity
& 0x10) {
2104 intensity
= fdata
->intensity
& ~0x10;
2107 intensity
= fdata
->intensity
;
2110 use_prefix
= base_priv
->features
.feature
[8] & 0x01;
2112 switch (intensity
) {
2113 case 0x00: /* Normal format */
2114 case 0x08: /* Normal format, use cdl. */
2115 cplength
= 2 + (rpt
*nr_tracks
);
2117 datasize
= sizeof(struct PFX_eckd_data
) +
2118 sizeof(struct LO_eckd_data
) +
2119 rpt
* nr_tracks
* sizeof(struct eckd_count
);
2121 datasize
= sizeof(struct DE_eckd_data
) +
2122 sizeof(struct LO_eckd_data
) +
2123 rpt
* nr_tracks
* sizeof(struct eckd_count
);
2125 case 0x01: /* Write record zero and format track. */
2126 case 0x09: /* Write record zero and format track, use cdl. */
2127 cplength
= 2 + rpt
* nr_tracks
;
2129 datasize
= sizeof(struct PFX_eckd_data
) +
2130 sizeof(struct LO_eckd_data
) +
2131 sizeof(struct eckd_count
) +
2132 rpt
* nr_tracks
* sizeof(struct eckd_count
);
2134 datasize
= sizeof(struct DE_eckd_data
) +
2135 sizeof(struct LO_eckd_data
) +
2136 sizeof(struct eckd_count
) +
2137 rpt
* nr_tracks
* sizeof(struct eckd_count
);
2139 case 0x04: /* Invalidate track. */
2140 case 0x0c: /* Invalidate track, use cdl. */
2143 datasize
= sizeof(struct PFX_eckd_data
) +
2144 sizeof(struct LO_eckd_data
) +
2145 sizeof(struct eckd_count
);
2147 datasize
= sizeof(struct DE_eckd_data
) +
2148 sizeof(struct LO_eckd_data
) +
2149 sizeof(struct eckd_count
);
2152 dev_warn(&startdev
->cdev
->dev
,
2153 "An I/O control call used incorrect flags 0x%x\n",
2155 return ERR_PTR(-EINVAL
);
2157 /* Allocate the format ccw request. */
2158 fcp
= dasd_smalloc_request(DASD_ECKD_MAGIC
, cplength
,
2159 datasize
, startdev
);
2163 start_priv
->count
++;
2167 switch (intensity
& ~0x08) {
2168 case 0x00: /* Normal format. */
2170 prefix(ccw
++, (struct PFX_eckd_data
*) data
,
2171 fdata
->start_unit
, fdata
->stop_unit
,
2172 DASD_ECKD_CCW_WRITE_CKD
, base
, startdev
);
2173 /* grant subsystem permission to format R0 */
2175 ((struct PFX_eckd_data
*)data
)
2176 ->define_extent
.ga_extended
|= 0x04;
2177 data
+= sizeof(struct PFX_eckd_data
);
2179 define_extent(ccw
++, (struct DE_eckd_data
*) data
,
2180 fdata
->start_unit
, fdata
->stop_unit
,
2181 DASD_ECKD_CCW_WRITE_CKD
, startdev
);
2182 /* grant subsystem permission to format R0 */
2184 ((struct DE_eckd_data
*) data
)
2185 ->ga_extended
|= 0x04;
2186 data
+= sizeof(struct DE_eckd_data
);
2188 ccw
[-1].flags
|= CCW_FLAG_CC
;
2189 locate_record(ccw
++, (struct LO_eckd_data
*) data
,
2190 fdata
->start_unit
, 0, rpt
*nr_tracks
,
2191 DASD_ECKD_CCW_WRITE_CKD
, base
,
2193 data
+= sizeof(struct LO_eckd_data
);
2195 case 0x01: /* Write record zero + format track. */
2197 prefix(ccw
++, (struct PFX_eckd_data
*) data
,
2198 fdata
->start_unit
, fdata
->stop_unit
,
2199 DASD_ECKD_CCW_WRITE_RECORD_ZERO
,
2201 data
+= sizeof(struct PFX_eckd_data
);
2203 define_extent(ccw
++, (struct DE_eckd_data
*) data
,
2204 fdata
->start_unit
, fdata
->stop_unit
,
2205 DASD_ECKD_CCW_WRITE_RECORD_ZERO
, startdev
);
2206 data
+= sizeof(struct DE_eckd_data
);
2208 ccw
[-1].flags
|= CCW_FLAG_CC
;
2209 locate_record(ccw
++, (struct LO_eckd_data
*) data
,
2210 fdata
->start_unit
, 0, rpt
* nr_tracks
+ 1,
2211 DASD_ECKD_CCW_WRITE_RECORD_ZERO
, base
,
2212 base
->block
->bp_block
);
2213 data
+= sizeof(struct LO_eckd_data
);
2215 case 0x04: /* Invalidate track. */
2217 prefix(ccw
++, (struct PFX_eckd_data
*) data
,
2218 fdata
->start_unit
, fdata
->stop_unit
,
2219 DASD_ECKD_CCW_WRITE_CKD
, base
, startdev
);
2220 data
+= sizeof(struct PFX_eckd_data
);
2222 define_extent(ccw
++, (struct DE_eckd_data
*) data
,
2223 fdata
->start_unit
, fdata
->stop_unit
,
2224 DASD_ECKD_CCW_WRITE_CKD
, startdev
);
2225 data
+= sizeof(struct DE_eckd_data
);
2227 ccw
[-1].flags
|= CCW_FLAG_CC
;
2228 locate_record(ccw
++, (struct LO_eckd_data
*) data
,
2229 fdata
->start_unit
, 0, 1,
2230 DASD_ECKD_CCW_WRITE_CKD
, base
, 8);
2231 data
+= sizeof(struct LO_eckd_data
);
2235 for (j
= 0; j
< nr_tracks
; j
++) {
2236 /* calculate cylinder and head for the current track */
2238 (fdata
->start_unit
+ j
) /
2239 base_priv
->rdc_data
.trk_per_cyl
,
2240 (fdata
->start_unit
+ j
) %
2241 base_priv
->rdc_data
.trk_per_cyl
);
2242 if (intensity
& 0x01) { /* write record zero */
2243 ect
= (struct eckd_count
*) data
;
2244 data
+= sizeof(struct eckd_count
);
2245 ect
->cyl
= address
.cyl
;
2246 ect
->head
= address
.head
;
2250 ccw
[-1].flags
|= CCW_FLAG_CC
;
2251 ccw
->cmd_code
= DASD_ECKD_CCW_WRITE_RECORD_ZERO
;
2252 ccw
->flags
= CCW_FLAG_SLI
;
2254 ccw
->cda
= (__u32
)(addr_t
) ect
;
2257 if ((intensity
& ~0x08) & 0x04) { /* erase track */
2258 ect
= (struct eckd_count
*) data
;
2259 data
+= sizeof(struct eckd_count
);
2260 ect
->cyl
= address
.cyl
;
2261 ect
->head
= address
.head
;
2265 ccw
[-1].flags
|= CCW_FLAG_CC
;
2266 ccw
->cmd_code
= DASD_ECKD_CCW_WRITE_CKD
;
2267 ccw
->flags
= CCW_FLAG_SLI
;
2269 ccw
->cda
= (__u32
)(addr_t
) ect
;
2270 } else { /* write remaining records */
2271 for (i
= 0; i
< rpt
; i
++) {
2272 ect
= (struct eckd_count
*) data
;
2273 data
+= sizeof(struct eckd_count
);
2274 ect
->cyl
= address
.cyl
;
2275 ect
->head
= address
.head
;
2276 ect
->record
= i
+ 1;
2278 ect
->dl
= fdata
->blksize
;
2280 * Check for special tracks 0-1
2281 * when formatting CDL
2283 if ((intensity
& 0x08) &&
2284 fdata
->start_unit
== 0) {
2287 ect
->dl
= sizes_trk0
[i
] - 4;
2290 if ((intensity
& 0x08) &&
2291 fdata
->start_unit
== 1) {
2293 ect
->dl
= LABEL_SIZE
- 44;
2295 ccw
[-1].flags
|= CCW_FLAG_CC
;
2296 if (i
!= 0 || j
== 0)
2298 DASD_ECKD_CCW_WRITE_CKD
;
2301 DASD_ECKD_CCW_WRITE_CKD_MT
;
2302 ccw
->flags
= CCW_FLAG_SLI
;
2304 ccw
->cda
= (__u32
)(addr_t
) ect
;
2310 fcp
->startdev
= startdev
;
2311 fcp
->memdev
= startdev
;
2313 fcp
->expires
= startdev
->default_expires
* HZ
;
2314 fcp
->buildclk
= get_tod_clock();
2315 fcp
->status
= DASD_CQR_FILLED
;
2321 dasd_eckd_format_device(struct dasd_device
*base
,
2322 struct format_data_t
*fdata
)
2324 struct dasd_ccw_req
*cqr
, *n
;
2325 struct dasd_block
*block
;
2326 struct dasd_eckd_private
*private;
2327 struct list_head format_queue
;
2328 struct dasd_device
*device
;
2329 int old_stop
, format_step
;
2332 block
= base
->block
;
2333 private = (struct dasd_eckd_private
*) base
->private;
2335 /* Sanity checks. */
2336 if (fdata
->start_unit
>=
2337 (private->real_cyl
* private->rdc_data
.trk_per_cyl
)) {
2338 dev_warn(&base
->cdev
->dev
,
2339 "Start track number %u used in formatting is too big\n",
2343 if (fdata
->stop_unit
>=
2344 (private->real_cyl
* private->rdc_data
.trk_per_cyl
)) {
2345 dev_warn(&base
->cdev
->dev
,
2346 "Stop track number %u used in formatting is too big\n",
2350 if (fdata
->start_unit
> fdata
->stop_unit
) {
2351 dev_warn(&base
->cdev
->dev
,
2352 "Start track %u used in formatting exceeds end track\n",
2356 if (dasd_check_blocksize(fdata
->blksize
) != 0) {
2357 dev_warn(&base
->cdev
->dev
,
2358 "The DASD cannot be formatted with block size %u\n",
2363 INIT_LIST_HEAD(&format_queue
);
2364 old_stop
= fdata
->stop_unit
;
2366 while (fdata
->start_unit
<= 1) {
2367 fdata
->stop_unit
= fdata
->start_unit
;
2368 cqr
= dasd_eckd_build_format(base
, fdata
);
2369 list_add(&cqr
->blocklist
, &format_queue
);
2371 fdata
->stop_unit
= old_stop
;
2372 fdata
->start_unit
++;
2374 if (fdata
->start_unit
> fdata
->stop_unit
)
2379 format_step
= 255 / recs_per_track(&private->rdc_data
, 0,
2381 while (fdata
->start_unit
<= old_stop
) {
2382 step
= fdata
->stop_unit
- fdata
->start_unit
+ 1;
2383 if (step
> format_step
)
2384 fdata
->stop_unit
= fdata
->start_unit
+ format_step
- 1;
2386 cqr
= dasd_eckd_build_format(base
, fdata
);
2388 if (PTR_ERR(cqr
) == -ENOMEM
) {
2390 * not enough memory available
2391 * go to out and start requests
2392 * retry after first requests were finished
2394 fdata
->stop_unit
= old_stop
;
2397 return PTR_ERR(cqr
);
2399 list_add(&cqr
->blocklist
, &format_queue
);
2401 fdata
->start_unit
= fdata
->stop_unit
+ 1;
2402 fdata
->stop_unit
= old_stop
;
2406 dasd_sleep_on_queue(&format_queue
);
2408 list_for_each_entry_safe(cqr
, n
, &format_queue
, blocklist
) {
2409 device
= cqr
->startdev
;
2410 private = (struct dasd_eckd_private
*) device
->private;
2411 if (cqr
->status
== DASD_CQR_FAILED
)
2413 list_del_init(&cqr
->blocklist
);
2414 dasd_sfree_request(cqr
, device
);
2419 * in case of ENOMEM we need to retry after
2420 * first requests are finished
2422 if (fdata
->start_unit
<= fdata
->stop_unit
)
2428 static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req
*cqr
)
2430 if (cqr
->retries
< 0) {
2431 cqr
->status
= DASD_CQR_FAILED
;
2434 cqr
->status
= DASD_CQR_FILLED
;
2435 if (cqr
->block
&& (cqr
->startdev
!= cqr
->block
->base
)) {
2436 dasd_eckd_reset_ccw_to_base_io(cqr
);
2437 cqr
->startdev
= cqr
->block
->base
;
2438 cqr
->lpm
= cqr
->block
->base
->path_data
.opm
;
2442 static dasd_erp_fn_t
2443 dasd_eckd_erp_action(struct dasd_ccw_req
* cqr
)
2445 struct dasd_device
*device
= (struct dasd_device
*) cqr
->startdev
;
2446 struct ccw_device
*cdev
= device
->cdev
;
2448 switch (cdev
->id
.cu_type
) {
2453 return dasd_3990_erp_action
;
2457 return dasd_default_erp_action
;
2461 static dasd_erp_fn_t
2462 dasd_eckd_erp_postaction(struct dasd_ccw_req
* cqr
)
2464 return dasd_default_erp_postaction
;
2467 static void dasd_eckd_check_for_device_change(struct dasd_device
*device
,
2468 struct dasd_ccw_req
*cqr
,
2473 struct dasd_eckd_private
*private;
2475 private = (struct dasd_eckd_private
*) device
->private;
2476 /* first of all check for state change pending interrupt */
2477 mask
= DEV_STAT_ATTENTION
| DEV_STAT_DEV_END
| DEV_STAT_UNIT_EXCEP
;
2478 if ((scsw_dstat(&irb
->scsw
) & mask
) == mask
) {
2480 * for alias only, not in offline processing
2481 * and only if not suspended
2483 if (!device
->block
&& private->lcu
&&
2484 device
->state
== DASD_STATE_ONLINE
&&
2485 !test_bit(DASD_FLAG_OFFLINE
, &device
->flags
) &&
2486 !test_bit(DASD_FLAG_SUSPENDED
, &device
->flags
)) {
2488 * the state change could be caused by an alias
2489 * reassignment remove device from alias handling
2490 * to prevent new requests from being scheduled on
2491 * the wrong alias device
2493 dasd_alias_remove_device(device
);
2495 /* schedule worker to reload device */
2496 dasd_reload_device(device
);
2498 dasd_generic_handle_state_change(device
);
2502 sense
= dasd_get_sense(irb
);
2506 /* summary unit check */
2507 if ((sense
[27] & DASD_SENSE_BIT_0
) && (sense
[7] == 0x0D) &&
2508 (scsw_dstat(&irb
->scsw
) & DEV_STAT_UNIT_CHECK
)) {
2509 dasd_alias_handle_summary_unit_check(device
, irb
);
2513 /* service information message SIM */
2514 if (!cqr
&& !(sense
[27] & DASD_SENSE_BIT_0
) &&
2515 ((sense
[6] & DASD_SIM_SENSE
) == DASD_SIM_SENSE
)) {
2516 dasd_3990_erp_handle_sim(device
, sense
);
2520 /* loss of device reservation is handled via base devices only
2521 * as alias devices may be used with several bases
2523 if (device
->block
&& (sense
[27] & DASD_SENSE_BIT_0
) &&
2524 (sense
[7] == 0x3F) &&
2525 (scsw_dstat(&irb
->scsw
) & DEV_STAT_UNIT_CHECK
) &&
2526 test_bit(DASD_FLAG_IS_RESERVED
, &device
->flags
)) {
2527 if (device
->features
& DASD_FEATURE_FAILONSLCK
)
2528 set_bit(DASD_FLAG_LOCK_STOLEN
, &device
->flags
);
2529 clear_bit(DASD_FLAG_IS_RESERVED
, &device
->flags
);
2530 dev_err(&device
->cdev
->dev
,
2531 "The device reservation was lost\n");
2535 static struct dasd_ccw_req
*dasd_eckd_build_cp_cmd_single(
2536 struct dasd_device
*startdev
,
2537 struct dasd_block
*block
,
2538 struct request
*req
,
2543 unsigned int first_offs
,
2544 unsigned int last_offs
,
2545 unsigned int blk_per_trk
,
2546 unsigned int blksize
)
2548 struct dasd_eckd_private
*private;
2549 unsigned long *idaws
;
2550 struct LO_eckd_data
*LO_data
;
2551 struct dasd_ccw_req
*cqr
;
2553 struct req_iterator iter
;
2557 int count
, cidaw
, cplength
, datasize
;
2559 unsigned char cmd
, rcmd
;
2561 struct dasd_device
*basedev
;
2563 basedev
= block
->base
;
2564 private = (struct dasd_eckd_private
*) basedev
->private;
2565 if (rq_data_dir(req
) == READ
)
2566 cmd
= DASD_ECKD_CCW_READ_MT
;
2567 else if (rq_data_dir(req
) == WRITE
)
2568 cmd
= DASD_ECKD_CCW_WRITE_MT
;
2570 return ERR_PTR(-EINVAL
);
2572 /* Check struct bio and count the number of blocks for the request. */
2575 rq_for_each_segment(bv
, req
, iter
) {
2576 if (bv
.bv_len
& (blksize
- 1))
2577 /* Eckd can only do full blocks. */
2578 return ERR_PTR(-EINVAL
);
2579 count
+= bv
.bv_len
>> (block
->s2b_shift
+ 9);
2580 #if defined(CONFIG_64BIT)
2581 if (idal_is_needed (page_address(bv
.bv_page
), bv
.bv_len
))
2582 cidaw
+= bv
.bv_len
>> (block
->s2b_shift
+ 9);
2586 if (count
!= last_rec
- first_rec
+ 1)
2587 return ERR_PTR(-EINVAL
);
2589 /* use the prefix command if available */
2590 use_prefix
= private->features
.feature
[8] & 0x01;
2592 /* 1x prefix + number of blocks */
2593 cplength
= 2 + count
;
2594 /* 1x prefix + cidaws*sizeof(long) */
2595 datasize
= sizeof(struct PFX_eckd_data
) +
2596 sizeof(struct LO_eckd_data
) +
2597 cidaw
* sizeof(unsigned long);
2599 /* 1x define extent + 1x locate record + number of blocks */
2600 cplength
= 2 + count
;
2601 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */
2602 datasize
= sizeof(struct DE_eckd_data
) +
2603 sizeof(struct LO_eckd_data
) +
2604 cidaw
* sizeof(unsigned long);
2606 /* Find out the number of additional locate record ccws for cdl. */
2607 if (private->uses_cdl
&& first_rec
< 2*blk_per_trk
) {
2608 if (last_rec
>= 2*blk_per_trk
)
2609 count
= 2*blk_per_trk
- first_rec
;
2611 datasize
+= count
*sizeof(struct LO_eckd_data
);
2613 /* Allocate the ccw request. */
2614 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, cplength
, datasize
,
2619 /* First ccw is define extent or prefix. */
2621 if (prefix(ccw
++, cqr
->data
, first_trk
,
2622 last_trk
, cmd
, basedev
, startdev
) == -EAGAIN
) {
2623 /* Clock not in sync and XRC is enabled.
2626 dasd_sfree_request(cqr
, startdev
);
2627 return ERR_PTR(-EAGAIN
);
2629 idaws
= (unsigned long *) (cqr
->data
+
2630 sizeof(struct PFX_eckd_data
));
2632 if (define_extent(ccw
++, cqr
->data
, first_trk
,
2633 last_trk
, cmd
, basedev
) == -EAGAIN
) {
2634 /* Clock not in sync and XRC is enabled.
2637 dasd_sfree_request(cqr
, startdev
);
2638 return ERR_PTR(-EAGAIN
);
2640 idaws
= (unsigned long *) (cqr
->data
+
2641 sizeof(struct DE_eckd_data
));
2643 /* Build locate_record+read/write/ccws. */
2644 LO_data
= (struct LO_eckd_data
*) (idaws
+ cidaw
);
2646 if (private->uses_cdl
== 0 || recid
> 2*blk_per_trk
) {
2647 /* Only standard blocks so there is just one locate record. */
2648 ccw
[-1].flags
|= CCW_FLAG_CC
;
2649 locate_record(ccw
++, LO_data
++, first_trk
, first_offs
+ 1,
2650 last_rec
- recid
+ 1, cmd
, basedev
, blksize
);
2652 rq_for_each_segment(bv
, req
, iter
) {
2653 dst
= page_address(bv
.bv_page
) + bv
.bv_offset
;
2654 if (dasd_page_cache
) {
2655 char *copy
= kmem_cache_alloc(dasd_page_cache
,
2656 GFP_DMA
| __GFP_NOWARN
);
2657 if (copy
&& rq_data_dir(req
) == WRITE
)
2658 memcpy(copy
+ bv
.bv_offset
, dst
, bv
.bv_len
);
2660 dst
= copy
+ bv
.bv_offset
;
2662 for (off
= 0; off
< bv
.bv_len
; off
+= blksize
) {
2663 sector_t trkid
= recid
;
2664 unsigned int recoffs
= sector_div(trkid
, blk_per_trk
);
2667 /* Locate record for cdl special block ? */
2668 if (private->uses_cdl
&& recid
< 2*blk_per_trk
) {
2669 if (dasd_eckd_cdl_special(blk_per_trk
, recid
)){
2671 count
= dasd_eckd_cdl_reclen(recid
);
2672 if (count
< blksize
&&
2673 rq_data_dir(req
) == READ
)
2674 memset(dst
+ count
, 0xe5,
2677 ccw
[-1].flags
|= CCW_FLAG_CC
;
2678 locate_record(ccw
++, LO_data
++,
2680 1, rcmd
, basedev
, count
);
2682 /* Locate record for standard blocks ? */
2683 if (private->uses_cdl
&& recid
== 2*blk_per_trk
) {
2684 ccw
[-1].flags
|= CCW_FLAG_CC
;
2685 locate_record(ccw
++, LO_data
++,
2687 last_rec
- recid
+ 1,
2688 cmd
, basedev
, count
);
2690 /* Read/write ccw. */
2691 ccw
[-1].flags
|= CCW_FLAG_CC
;
2692 ccw
->cmd_code
= rcmd
;
2694 if (idal_is_needed(dst
, blksize
)) {
2695 ccw
->cda
= (__u32
)(addr_t
) idaws
;
2696 ccw
->flags
= CCW_FLAG_IDA
;
2697 idaws
= idal_create_words(idaws
, dst
, blksize
);
2699 ccw
->cda
= (__u32
)(addr_t
) dst
;
2707 if (blk_noretry_request(req
) ||
2708 block
->base
->features
& DASD_FEATURE_FAILFAST
)
2709 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
2710 cqr
->startdev
= startdev
;
2711 cqr
->memdev
= startdev
;
2713 cqr
->expires
= startdev
->default_expires
* HZ
; /* default 5 minutes */
2714 cqr
->lpm
= startdev
->path_data
.ppm
;
2715 cqr
->retries
= startdev
->default_retries
;
2716 cqr
->buildclk
= get_tod_clock();
2717 cqr
->status
= DASD_CQR_FILLED
;
2721 static struct dasd_ccw_req
*dasd_eckd_build_cp_cmd_track(
2722 struct dasd_device
*startdev
,
2723 struct dasd_block
*block
,
2724 struct request
*req
,
2729 unsigned int first_offs
,
2730 unsigned int last_offs
,
2731 unsigned int blk_per_trk
,
2732 unsigned int blksize
)
2734 unsigned long *idaws
;
2735 struct dasd_ccw_req
*cqr
;
2737 struct req_iterator iter
;
2739 char *dst
, *idaw_dst
;
2740 unsigned int cidaw
, cplength
, datasize
;
2744 struct dasd_device
*basedev
;
2745 unsigned int trkcount
, count
, count_to_trk_end
;
2746 unsigned int idaw_len
, seg_len
, part_len
, len_to_track_end
;
2747 unsigned char new_track
, end_idaw
;
2749 unsigned int recoffs
;
2751 basedev
= block
->base
;
2752 if (rq_data_dir(req
) == READ
)
2753 cmd
= DASD_ECKD_CCW_READ_TRACK_DATA
;
2754 else if (rq_data_dir(req
) == WRITE
)
2755 cmd
= DASD_ECKD_CCW_WRITE_TRACK_DATA
;
2757 return ERR_PTR(-EINVAL
);
2759 /* Track based I/O needs IDAWs for each page, and not just for
2760 * 64 bit addresses. We need additional idals for pages
2761 * that get filled from two tracks, so we use the number
2762 * of records as upper limit.
2764 cidaw
= last_rec
- first_rec
+ 1;
2765 trkcount
= last_trk
- first_trk
+ 1;
2767 /* 1x prefix + one read/write ccw per track */
2768 cplength
= 1 + trkcount
;
2770 /* on 31-bit we need space for two 32 bit addresses per page
2771 * on 64-bit one 64 bit address
2773 datasize
= sizeof(struct PFX_eckd_data
) +
2774 cidaw
* sizeof(unsigned long long);
2776 /* Allocate the ccw request. */
2777 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, cplength
, datasize
,
2782 /* transfer length factor: how many bytes to read from the last track */
2783 if (first_trk
== last_trk
)
2784 tlf
= last_offs
- first_offs
+ 1;
2786 tlf
= last_offs
+ 1;
2789 if (prefix_LRE(ccw
++, cqr
->data
, first_trk
,
2790 last_trk
, cmd
, basedev
, startdev
,
2791 1 /* format */, first_offs
+ 1,
2794 /* Clock not in sync and XRC is enabled.
2797 dasd_sfree_request(cqr
, startdev
);
2798 return ERR_PTR(-EAGAIN
);
2802 * The translation of request into ccw programs must meet the
2803 * following conditions:
2804 * - all idaws but the first and the last must address full pages
2805 * (or 2K blocks on 31-bit)
2806 * - the scope of a ccw and it's idal ends with the track boundaries
2808 idaws
= (unsigned long *) (cqr
->data
+ sizeof(struct PFX_eckd_data
));
2812 len_to_track_end
= 0;
2815 rq_for_each_segment(bv
, req
, iter
) {
2816 dst
= page_address(bv
.bv_page
) + bv
.bv_offset
;
2817 seg_len
= bv
.bv_len
;
2821 recoffs
= sector_div(trkid
, blk_per_trk
);
2822 count_to_trk_end
= blk_per_trk
- recoffs
;
2823 count
= min((last_rec
- recid
+ 1),
2824 (sector_t
)count_to_trk_end
);
2825 len_to_track_end
= count
* blksize
;
2826 ccw
[-1].flags
|= CCW_FLAG_CC
;
2827 ccw
->cmd_code
= cmd
;
2828 ccw
->count
= len_to_track_end
;
2829 ccw
->cda
= (__u32
)(addr_t
)idaws
;
2830 ccw
->flags
= CCW_FLAG_IDA
;
2834 /* first idaw for a ccw may start anywhere */
2838 /* If we start a new idaw, we must make sure that it
2839 * starts on an IDA_BLOCK_SIZE boundary.
2840 * If we continue an idaw, we must make sure that the
2841 * current segment begins where the so far accumulated
2845 if (__pa(dst
) & (IDA_BLOCK_SIZE
-1)) {
2846 dasd_sfree_request(cqr
, startdev
);
2847 return ERR_PTR(-ERANGE
);
2851 if ((idaw_dst
+ idaw_len
) != dst
) {
2852 dasd_sfree_request(cqr
, startdev
);
2853 return ERR_PTR(-ERANGE
);
2855 part_len
= min(seg_len
, len_to_track_end
);
2856 seg_len
-= part_len
;
2858 idaw_len
+= part_len
;
2859 len_to_track_end
-= part_len
;
2860 /* collected memory area ends on an IDA_BLOCK border,
2862 * idal_create_words will handle cases where idaw_len
2863 * is larger then IDA_BLOCK_SIZE
2865 if (!(__pa(idaw_dst
+ idaw_len
) & (IDA_BLOCK_SIZE
-1)))
2867 /* We also need to end the idaw at track end */
2868 if (!len_to_track_end
) {
2873 idaws
= idal_create_words(idaws
, idaw_dst
,
2882 if (blk_noretry_request(req
) ||
2883 block
->base
->features
& DASD_FEATURE_FAILFAST
)
2884 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
2885 cqr
->startdev
= startdev
;
2886 cqr
->memdev
= startdev
;
2888 cqr
->expires
= startdev
->default_expires
* HZ
; /* default 5 minutes */
2889 cqr
->lpm
= startdev
->path_data
.ppm
;
2890 cqr
->retries
= startdev
->default_retries
;
2891 cqr
->buildclk
= get_tod_clock();
2892 cqr
->status
= DASD_CQR_FILLED
;
2896 static int prepare_itcw(struct itcw
*itcw
,
2897 unsigned int trk
, unsigned int totrk
, int cmd
,
2898 struct dasd_device
*basedev
,
2899 struct dasd_device
*startdev
,
2900 unsigned int rec_on_trk
, int count
,
2901 unsigned int blksize
,
2902 unsigned int total_data_size
,
2904 unsigned int blk_per_trk
)
2906 struct PFX_eckd_data pfxdata
;
2907 struct dasd_eckd_private
*basepriv
, *startpriv
;
2908 struct DE_eckd_data
*dedata
;
2909 struct LRE_eckd_data
*lredata
;
2913 u16 heads
, beghead
, endhead
;
2921 /* setup prefix data */
2922 basepriv
= (struct dasd_eckd_private
*) basedev
->private;
2923 startpriv
= (struct dasd_eckd_private
*) startdev
->private;
2924 dedata
= &pfxdata
.define_extent
;
2925 lredata
= &pfxdata
.locate_record
;
2927 memset(&pfxdata
, 0, sizeof(pfxdata
));
2928 pfxdata
.format
= 1; /* PFX with LRE */
2929 pfxdata
.base_address
= basepriv
->ned
->unit_addr
;
2930 pfxdata
.base_lss
= basepriv
->ned
->ID
;
2931 pfxdata
.validity
.define_extent
= 1;
2933 /* private uid is kept up to date, conf_data may be outdated */
2934 if (startpriv
->uid
.type
!= UA_BASE_DEVICE
) {
2935 pfxdata
.validity
.verify_base
= 1;
2936 if (startpriv
->uid
.type
== UA_HYPER_PAV_ALIAS
)
2937 pfxdata
.validity
.hyper_pav
= 1;
2941 case DASD_ECKD_CCW_READ_TRACK_DATA
:
2942 dedata
->mask
.perm
= 0x1;
2943 dedata
->attributes
.operation
= basepriv
->attrib
.operation
;
2944 dedata
->blk_size
= blksize
;
2945 dedata
->ga_extended
|= 0x42;
2946 lredata
->operation
.orientation
= 0x0;
2947 lredata
->operation
.operation
= 0x0C;
2948 lredata
->auxiliary
.check_bytes
= 0x01;
2949 pfx_cmd
= DASD_ECKD_CCW_PFX_READ
;
2951 case DASD_ECKD_CCW_WRITE_TRACK_DATA
:
2952 dedata
->mask
.perm
= 0x02;
2953 dedata
->attributes
.operation
= basepriv
->attrib
.operation
;
2954 dedata
->blk_size
= blksize
;
2955 rc
= check_XRC_on_prefix(&pfxdata
, basedev
);
2956 dedata
->ga_extended
|= 0x42;
2957 lredata
->operation
.orientation
= 0x0;
2958 lredata
->operation
.operation
= 0x3F;
2959 lredata
->extended_operation
= 0x23;
2960 lredata
->auxiliary
.check_bytes
= 0x2;
2961 pfx_cmd
= DASD_ECKD_CCW_PFX
;
2964 DBF_DEV_EVENT(DBF_ERR
, basedev
,
2965 "prepare itcw, unknown opcode 0x%x", cmd
);
2972 dedata
->attributes
.mode
= 0x3; /* ECKD */
2974 heads
= basepriv
->rdc_data
.trk_per_cyl
;
2975 begcyl
= trk
/ heads
;
2976 beghead
= trk
% heads
;
2977 endcyl
= totrk
/ heads
;
2978 endhead
= totrk
% heads
;
2980 /* check for sequential prestage - enhance cylinder range */
2981 if (dedata
->attributes
.operation
== DASD_SEQ_PRESTAGE
||
2982 dedata
->attributes
.operation
== DASD_SEQ_ACCESS
) {
2984 if (endcyl
+ basepriv
->attrib
.nr_cyl
< basepriv
->real_cyl
)
2985 endcyl
+= basepriv
->attrib
.nr_cyl
;
2987 endcyl
= (basepriv
->real_cyl
- 1);
2990 set_ch_t(&dedata
->beg_ext
, begcyl
, beghead
);
2991 set_ch_t(&dedata
->end_ext
, endcyl
, endhead
);
2993 dedata
->ep_format
= 0x20; /* records per track is valid */
2994 dedata
->ep_rec_per_track
= blk_per_trk
;
2997 switch (basepriv
->rdc_data
.dev_type
) {
2999 dn
= ceil_quot(blksize
+ 6, 232);
3000 d
= 9 + ceil_quot(blksize
+ 6 * (dn
+ 1), 34);
3001 sector
= (49 + (rec_on_trk
- 1) * (10 + d
)) / 8;
3004 d
= 7 + ceil_quot(blksize
+ 12, 32);
3005 sector
= (39 + (rec_on_trk
- 1) * (8 + d
)) / 7;
3010 lredata
->auxiliary
.length_valid
= 1;
3011 lredata
->auxiliary
.length_scope
= 1;
3012 lredata
->auxiliary
.imbedded_ccw_valid
= 1;
3013 lredata
->length
= tlf
;
3014 lredata
->imbedded_ccw
= cmd
;
3015 lredata
->count
= count
;
3016 lredata
->sector
= sector
;
3017 set_ch_t(&lredata
->seek_addr
, begcyl
, beghead
);
3018 lredata
->search_arg
.cyl
= lredata
->seek_addr
.cyl
;
3019 lredata
->search_arg
.head
= lredata
->seek_addr
.head
;
3020 lredata
->search_arg
.record
= rec_on_trk
;
3022 dcw
= itcw_add_dcw(itcw
, pfx_cmd
, 0,
3023 &pfxdata
, sizeof(pfxdata
), total_data_size
);
3024 return PTR_RET(dcw
);
3027 static struct dasd_ccw_req
*dasd_eckd_build_cp_tpm_track(
3028 struct dasd_device
*startdev
,
3029 struct dasd_block
*block
,
3030 struct request
*req
,
3035 unsigned int first_offs
,
3036 unsigned int last_offs
,
3037 unsigned int blk_per_trk
,
3038 unsigned int blksize
)
3040 struct dasd_ccw_req
*cqr
;
3041 struct req_iterator iter
;
3044 unsigned int trkcount
, ctidaw
;
3046 struct dasd_device
*basedev
;
3049 struct tidaw
*last_tidaw
= NULL
;
3053 unsigned int seg_len
, part_len
, len_to_track_end
;
3054 unsigned char new_track
;
3055 sector_t recid
, trkid
;
3057 unsigned int count
, count_to_trk_end
;
3060 basedev
= block
->base
;
3061 if (rq_data_dir(req
) == READ
) {
3062 cmd
= DASD_ECKD_CCW_READ_TRACK_DATA
;
3063 itcw_op
= ITCW_OP_READ
;
3064 } else if (rq_data_dir(req
) == WRITE
) {
3065 cmd
= DASD_ECKD_CCW_WRITE_TRACK_DATA
;
3066 itcw_op
= ITCW_OP_WRITE
;
3068 return ERR_PTR(-EINVAL
);
3070 /* trackbased I/O needs address all memory via TIDAWs,
3071 * not just for 64 bit addresses. This allows us to map
3072 * each segment directly to one tidaw.
3073 * In the case of write requests, additional tidaws may
3074 * be needed when a segment crosses a track boundary.
3076 trkcount
= last_trk
- first_trk
+ 1;
3078 rq_for_each_segment(bv
, req
, iter
) {
3081 if (rq_data_dir(req
) == WRITE
)
3082 ctidaw
+= (last_trk
- first_trk
);
3084 /* Allocate the ccw request. */
3085 itcw_size
= itcw_calc_size(0, ctidaw
, 0);
3086 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 0, itcw_size
, startdev
);
3090 /* transfer length factor: how many bytes to read from the last track */
3091 if (first_trk
== last_trk
)
3092 tlf
= last_offs
- first_offs
+ 1;
3094 tlf
= last_offs
+ 1;
3097 itcw
= itcw_init(cqr
->data
, itcw_size
, itcw_op
, 0, ctidaw
, 0);
3102 cqr
->cpaddr
= itcw_get_tcw(itcw
);
3103 if (prepare_itcw(itcw
, first_trk
, last_trk
,
3104 cmd
, basedev
, startdev
,
3107 (last_rec
- first_rec
+ 1) * blksize
,
3108 tlf
, blk_per_trk
) == -EAGAIN
) {
3109 /* Clock not in sync and XRC is enabled.
3115 len_to_track_end
= 0;
3117 * A tidaw can address 4k of memory, but must not cross page boundaries
3118 * We can let the block layer handle this by setting
3119 * blk_queue_segment_boundary to page boundaries and
3120 * blk_max_segment_size to page size when setting up the request queue.
3121 * For write requests, a TIDAW must not cross track boundaries, because
3122 * we have to set the CBC flag on the last tidaw for each track.
3124 if (rq_data_dir(req
) == WRITE
) {
3127 rq_for_each_segment(bv
, req
, iter
) {
3128 dst
= page_address(bv
.bv_page
) + bv
.bv_offset
;
3129 seg_len
= bv
.bv_len
;
3133 offs
= sector_div(trkid
, blk_per_trk
);
3134 count_to_trk_end
= blk_per_trk
- offs
;
3135 count
= min((last_rec
- recid
+ 1),
3136 (sector_t
)count_to_trk_end
);
3137 len_to_track_end
= count
* blksize
;
3141 part_len
= min(seg_len
, len_to_track_end
);
3142 seg_len
-= part_len
;
3143 len_to_track_end
-= part_len
;
3144 /* We need to end the tidaw at track end */
3145 if (!len_to_track_end
) {
3147 tidaw_flags
= TIDAW_FLAGS_INSERT_CBC
;
3150 last_tidaw
= itcw_add_tidaw(itcw
, tidaw_flags
,
3152 if (IS_ERR(last_tidaw
)) {
3160 rq_for_each_segment(bv
, req
, iter
) {
3161 dst
= page_address(bv
.bv_page
) + bv
.bv_offset
;
3162 last_tidaw
= itcw_add_tidaw(itcw
, 0x00,
3164 if (IS_ERR(last_tidaw
)) {
3170 last_tidaw
->flags
|= TIDAW_FLAGS_LAST
;
3171 last_tidaw
->flags
&= ~TIDAW_FLAGS_INSERT_CBC
;
3172 itcw_finalize(itcw
);
3174 if (blk_noretry_request(req
) ||
3175 block
->base
->features
& DASD_FEATURE_FAILFAST
)
3176 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
3178 cqr
->startdev
= startdev
;
3179 cqr
->memdev
= startdev
;
3181 cqr
->expires
= startdev
->default_expires
* HZ
; /* default 5 minutes */
3182 cqr
->lpm
= startdev
->path_data
.ppm
;
3183 cqr
->retries
= startdev
->default_retries
;
3184 cqr
->buildclk
= get_tod_clock();
3185 cqr
->status
= DASD_CQR_FILLED
;
3188 dasd_sfree_request(cqr
, startdev
);
3189 return ERR_PTR(ret
);
3192 static struct dasd_ccw_req
*dasd_eckd_build_cp(struct dasd_device
*startdev
,
3193 struct dasd_block
*block
,
3194 struct request
*req
)
3199 struct dasd_eckd_private
*private;
3200 struct dasd_device
*basedev
;
3201 sector_t first_rec
, last_rec
;
3202 sector_t first_trk
, last_trk
;
3203 unsigned int first_offs
, last_offs
;
3204 unsigned int blk_per_trk
, blksize
;
3206 unsigned int data_size
;
3207 struct dasd_ccw_req
*cqr
;
3209 basedev
= block
->base
;
3210 private = (struct dasd_eckd_private
*) basedev
->private;
3212 /* Calculate number of blocks/records per track. */
3213 blksize
= block
->bp_block
;
3214 blk_per_trk
= recs_per_track(&private->rdc_data
, 0, blksize
);
3215 if (blk_per_trk
== 0)
3216 return ERR_PTR(-EINVAL
);
3217 /* Calculate record id of first and last block. */
3218 first_rec
= first_trk
= blk_rq_pos(req
) >> block
->s2b_shift
;
3219 first_offs
= sector_div(first_trk
, blk_per_trk
);
3220 last_rec
= last_trk
=
3221 (blk_rq_pos(req
) + blk_rq_sectors(req
) - 1) >> block
->s2b_shift
;
3222 last_offs
= sector_div(last_trk
, blk_per_trk
);
3223 cdlspecial
= (private->uses_cdl
&& first_rec
< 2*blk_per_trk
);
3225 fcx_multitrack
= private->features
.feature
[40] & 0x20;
3226 data_size
= blk_rq_bytes(req
);
3227 if (data_size
% blksize
)
3228 return ERR_PTR(-EINVAL
);
3229 /* tpm write request add CBC data on each track boundary */
3230 if (rq_data_dir(req
) == WRITE
)
3231 data_size
+= (last_trk
- first_trk
) * 4;
3233 /* is read track data and write track data in command mode supported? */
3234 cmdrtd
= private->features
.feature
[9] & 0x20;
3235 cmdwtd
= private->features
.feature
[12] & 0x40;
3236 use_prefix
= private->features
.feature
[8] & 0x01;
3239 if (cdlspecial
|| dasd_page_cache
) {
3240 /* do nothing, just fall through to the cmd mode single case */
3241 } else if ((data_size
<= private->fcx_max_data
)
3242 && (fcx_multitrack
|| (first_trk
== last_trk
))) {
3243 cqr
= dasd_eckd_build_cp_tpm_track(startdev
, block
, req
,
3244 first_rec
, last_rec
,
3245 first_trk
, last_trk
,
3246 first_offs
, last_offs
,
3247 blk_per_trk
, blksize
);
3248 if (IS_ERR(cqr
) && (PTR_ERR(cqr
) != -EAGAIN
) &&
3249 (PTR_ERR(cqr
) != -ENOMEM
))
3251 } else if (use_prefix
&&
3252 (((rq_data_dir(req
) == READ
) && cmdrtd
) ||
3253 ((rq_data_dir(req
) == WRITE
) && cmdwtd
))) {
3254 cqr
= dasd_eckd_build_cp_cmd_track(startdev
, block
, req
,
3255 first_rec
, last_rec
,
3256 first_trk
, last_trk
,
3257 first_offs
, last_offs
,
3258 blk_per_trk
, blksize
);
3259 if (IS_ERR(cqr
) && (PTR_ERR(cqr
) != -EAGAIN
) &&
3260 (PTR_ERR(cqr
) != -ENOMEM
))
3264 cqr
= dasd_eckd_build_cp_cmd_single(startdev
, block
, req
,
3265 first_rec
, last_rec
,
3266 first_trk
, last_trk
,
3267 first_offs
, last_offs
,
3268 blk_per_trk
, blksize
);
3272 static struct dasd_ccw_req
*dasd_raw_build_cp(struct dasd_device
*startdev
,
3273 struct dasd_block
*block
,
3274 struct request
*req
)
3276 unsigned long *idaws
;
3277 struct dasd_device
*basedev
;
3278 struct dasd_ccw_req
*cqr
;
3280 struct req_iterator iter
;
3284 unsigned int trkcount
;
3285 unsigned int seg_len
, len_to_track_end
;
3286 unsigned int first_offs
;
3287 unsigned int cidaw
, cplength
, datasize
;
3288 sector_t first_trk
, last_trk
, sectors
;
3289 sector_t start_padding_sectors
, end_sector_offset
, end_padding_sectors
;
3290 unsigned int pfx_datasize
;
3293 * raw track access needs to be mutiple of 64k and on 64k boundary
3294 * For read requests we can fix an incorrect alignment by padding
3295 * the request with dummy pages.
3297 start_padding_sectors
= blk_rq_pos(req
) % DASD_RAW_SECTORS_PER_TRACK
;
3298 end_sector_offset
= (blk_rq_pos(req
) + blk_rq_sectors(req
)) %
3299 DASD_RAW_SECTORS_PER_TRACK
;
3300 end_padding_sectors
= (DASD_RAW_SECTORS_PER_TRACK
- end_sector_offset
) %
3301 DASD_RAW_SECTORS_PER_TRACK
;
3302 basedev
= block
->base
;
3303 if ((start_padding_sectors
|| end_padding_sectors
) &&
3304 (rq_data_dir(req
) == WRITE
)) {
3305 DBF_DEV_EVENT(DBF_ERR
, basedev
,
3306 "raw write not track aligned (%lu,%lu) req %p",
3307 start_padding_sectors
, end_padding_sectors
, req
);
3308 cqr
= ERR_PTR(-EINVAL
);
3312 first_trk
= blk_rq_pos(req
) / DASD_RAW_SECTORS_PER_TRACK
;
3313 last_trk
= (blk_rq_pos(req
) + blk_rq_sectors(req
) - 1) /
3314 DASD_RAW_SECTORS_PER_TRACK
;
3315 trkcount
= last_trk
- first_trk
+ 1;
3318 if (rq_data_dir(req
) == READ
)
3319 cmd
= DASD_ECKD_CCW_READ_TRACK
;
3320 else if (rq_data_dir(req
) == WRITE
)
3321 cmd
= DASD_ECKD_CCW_WRITE_FULL_TRACK
;
3323 cqr
= ERR_PTR(-EINVAL
);
3328 * Raw track based I/O needs IDAWs for each page,
3329 * and not just for 64 bit addresses.
3331 cidaw
= trkcount
* DASD_RAW_BLOCK_PER_TRACK
;
3333 /* 1x prefix + one read/write ccw per track */
3334 cplength
= 1 + trkcount
;
3337 * struct PFX_eckd_data has up to 2 byte as extended parameter
3338 * this is needed for write full track and has to be mentioned
3340 * add 8 instead of 2 to keep 8 byte boundary
3342 pfx_datasize
= sizeof(struct PFX_eckd_data
) + 8;
3344 datasize
= pfx_datasize
+ cidaw
* sizeof(unsigned long long);
3346 /* Allocate the ccw request. */
3347 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, cplength
,
3348 datasize
, startdev
);
3353 if (prefix_LRE(ccw
++, cqr
->data
, first_trk
, last_trk
, cmd
,
3354 basedev
, startdev
, 1 /* format */, first_offs
+ 1,
3355 trkcount
, 0, 0) == -EAGAIN
) {
3356 /* Clock not in sync and XRC is enabled.
3359 dasd_sfree_request(cqr
, startdev
);
3360 cqr
= ERR_PTR(-EAGAIN
);
3364 idaws
= (unsigned long *)(cqr
->data
+ pfx_datasize
);
3365 len_to_track_end
= 0;
3366 if (start_padding_sectors
) {
3367 ccw
[-1].flags
|= CCW_FLAG_CC
;
3368 ccw
->cmd_code
= cmd
;
3369 /* maximum 3390 track size */
3371 /* 64k map to one track */
3372 len_to_track_end
= 65536 - start_padding_sectors
* 512;
3373 ccw
->cda
= (__u32
)(addr_t
)idaws
;
3374 ccw
->flags
|= CCW_FLAG_IDA
;
3375 ccw
->flags
|= CCW_FLAG_SLI
;
3377 for (sectors
= 0; sectors
< start_padding_sectors
; sectors
+= 8)
3378 idaws
= idal_create_words(idaws
, rawpadpage
, PAGE_SIZE
);
3380 rq_for_each_segment(bv
, req
, iter
) {
3381 dst
= page_address(bv
.bv_page
) + bv
.bv_offset
;
3382 seg_len
= bv
.bv_len
;
3383 if (cmd
== DASD_ECKD_CCW_READ_TRACK
)
3384 memset(dst
, 0, seg_len
);
3385 if (!len_to_track_end
) {
3386 ccw
[-1].flags
|= CCW_FLAG_CC
;
3387 ccw
->cmd_code
= cmd
;
3388 /* maximum 3390 track size */
3390 /* 64k map to one track */
3391 len_to_track_end
= 65536;
3392 ccw
->cda
= (__u32
)(addr_t
)idaws
;
3393 ccw
->flags
|= CCW_FLAG_IDA
;
3394 ccw
->flags
|= CCW_FLAG_SLI
;
3397 len_to_track_end
-= seg_len
;
3398 idaws
= idal_create_words(idaws
, dst
, seg_len
);
3400 for (sectors
= 0; sectors
< end_padding_sectors
; sectors
+= 8)
3401 idaws
= idal_create_words(idaws
, rawpadpage
, PAGE_SIZE
);
3402 if (blk_noretry_request(req
) ||
3403 block
->base
->features
& DASD_FEATURE_FAILFAST
)
3404 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
3405 cqr
->startdev
= startdev
;
3406 cqr
->memdev
= startdev
;
3408 cqr
->expires
= startdev
->default_expires
* HZ
;
3409 cqr
->lpm
= startdev
->path_data
.ppm
;
3410 cqr
->retries
= startdev
->default_retries
;
3411 cqr
->buildclk
= get_tod_clock();
3412 cqr
->status
= DASD_CQR_FILLED
;
3414 if (IS_ERR(cqr
) && PTR_ERR(cqr
) != -EAGAIN
)
3422 dasd_eckd_free_cp(struct dasd_ccw_req
*cqr
, struct request
*req
)
3424 struct dasd_eckd_private
*private;
3426 struct req_iterator iter
;
3429 unsigned int blksize
, blk_per_trk
, off
;
3433 if (!dasd_page_cache
)
3435 private = (struct dasd_eckd_private
*) cqr
->block
->base
->private;
3436 blksize
= cqr
->block
->bp_block
;
3437 blk_per_trk
= recs_per_track(&private->rdc_data
, 0, blksize
);
3438 recid
= blk_rq_pos(req
) >> cqr
->block
->s2b_shift
;
3440 /* Skip over define extent & locate record. */
3442 if (private->uses_cdl
== 0 || recid
> 2*blk_per_trk
)
3444 rq_for_each_segment(bv
, req
, iter
) {
3445 dst
= page_address(bv
.bv_page
) + bv
.bv_offset
;
3446 for (off
= 0; off
< bv
.bv_len
; off
+= blksize
) {
3447 /* Skip locate record. */
3448 if (private->uses_cdl
&& recid
<= 2*blk_per_trk
)
3451 if (ccw
->flags
& CCW_FLAG_IDA
)
3452 cda
= *((char **)((addr_t
) ccw
->cda
));
3454 cda
= (char *)((addr_t
) ccw
->cda
);
3456 if (rq_data_dir(req
) == READ
)
3457 memcpy(dst
, cda
, bv
.bv_len
);
3458 kmem_cache_free(dasd_page_cache
,
3459 (void *)((addr_t
)cda
& PAGE_MASK
));
3468 status
= cqr
->status
== DASD_CQR_DONE
;
3469 dasd_sfree_request(cqr
, cqr
->memdev
);
3474 * Modify ccw/tcw in cqr so it can be started on a base device.
3476 * Note that this is not enough to restart the cqr!
3477 * Either reset cqr->startdev as well (summary unit check handling)
3478 * or restart via separate cqr (as in ERP handling).
3480 void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req
*cqr
)
3483 struct PFX_eckd_data
*pfxdata
;
3488 if (cqr
->cpmode
== 1) {
3490 tccb
= tcw_get_tccb(tcw
);
3491 dcw
= (struct dcw
*)&tccb
->tca
[0];
3492 pfxdata
= (struct PFX_eckd_data
*)&dcw
->cd
[0];
3493 pfxdata
->validity
.verify_base
= 0;
3494 pfxdata
->validity
.hyper_pav
= 0;
3497 pfxdata
= cqr
->data
;
3498 if (ccw
->cmd_code
== DASD_ECKD_CCW_PFX
) {
3499 pfxdata
->validity
.verify_base
= 0;
3500 pfxdata
->validity
.hyper_pav
= 0;
3505 #define DASD_ECKD_CHANQ_MAX_SIZE 4
3507 static struct dasd_ccw_req
*dasd_eckd_build_alias_cp(struct dasd_device
*base
,
3508 struct dasd_block
*block
,
3509 struct request
*req
)
3511 struct dasd_eckd_private
*private;
3512 struct dasd_device
*startdev
;
3513 unsigned long flags
;
3514 struct dasd_ccw_req
*cqr
;
3516 startdev
= dasd_alias_get_start_dev(base
);
3519 private = (struct dasd_eckd_private
*) startdev
->private;
3520 if (private->count
>= DASD_ECKD_CHANQ_MAX_SIZE
)
3521 return ERR_PTR(-EBUSY
);
3523 spin_lock_irqsave(get_ccwdev_lock(startdev
->cdev
), flags
);
3525 if ((base
->features
& DASD_FEATURE_USERAW
))
3526 cqr
= dasd_raw_build_cp(startdev
, block
, req
);
3528 cqr
= dasd_eckd_build_cp(startdev
, block
, req
);
3531 spin_unlock_irqrestore(get_ccwdev_lock(startdev
->cdev
), flags
);
3535 static int dasd_eckd_free_alias_cp(struct dasd_ccw_req
*cqr
,
3536 struct request
*req
)
3538 struct dasd_eckd_private
*private;
3539 unsigned long flags
;
3541 spin_lock_irqsave(get_ccwdev_lock(cqr
->memdev
->cdev
), flags
);
3542 private = (struct dasd_eckd_private
*) cqr
->memdev
->private;
3544 spin_unlock_irqrestore(get_ccwdev_lock(cqr
->memdev
->cdev
), flags
);
3545 return dasd_eckd_free_cp(cqr
, req
);
3549 dasd_eckd_fill_info(struct dasd_device
* device
,
3550 struct dasd_information2_t
* info
)
3552 struct dasd_eckd_private
*private;
3554 private = (struct dasd_eckd_private
*) device
->private;
3555 info
->label_block
= 2;
3556 info
->FBA_layout
= private->uses_cdl
? 0 : 1;
3557 info
->format
= private->uses_cdl
? DASD_FORMAT_CDL
: DASD_FORMAT_LDL
;
3558 info
->characteristics_size
= sizeof(struct dasd_eckd_characteristics
);
3559 memcpy(info
->characteristics
, &private->rdc_data
,
3560 sizeof(struct dasd_eckd_characteristics
));
3561 info
->confdata_size
= min((unsigned long)private->conf_len
,
3562 sizeof(info
->configuration_data
));
3563 memcpy(info
->configuration_data
, private->conf_data
,
3564 info
->confdata_size
);
3569 * SECTION: ioctl functions for eckd devices.
3573 * Release device ioctl.
3574 * Buils a channel programm to releases a prior reserved
3575 * (see dasd_eckd_reserve) device.
3578 dasd_eckd_release(struct dasd_device
*device
)
3580 struct dasd_ccw_req
*cqr
;
3585 if (!capable(CAP_SYS_ADMIN
))
3589 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1, 32, device
);
3591 mutex_lock(&dasd_reserve_mutex
);
3593 cqr
= &dasd_reserve_req
->cqr
;
3594 memset(cqr
, 0, sizeof(*cqr
));
3595 memset(&dasd_reserve_req
->ccw
, 0,
3596 sizeof(dasd_reserve_req
->ccw
));
3597 cqr
->cpaddr
= &dasd_reserve_req
->ccw
;
3598 cqr
->data
= &dasd_reserve_req
->data
;
3599 cqr
->magic
= DASD_ECKD_MAGIC
;
3602 ccw
->cmd_code
= DASD_ECKD_CCW_RELEASE
;
3603 ccw
->flags
|= CCW_FLAG_SLI
;
3605 ccw
->cda
= (__u32
)(addr_t
) cqr
->data
;
3606 cqr
->startdev
= device
;
3607 cqr
->memdev
= device
;
3608 clear_bit(DASD_CQR_FLAGS_USE_ERP
, &cqr
->flags
);
3609 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
3610 cqr
->retries
= 2; /* set retry counter to enable basic ERP */
3611 cqr
->expires
= 2 * HZ
;
3612 cqr
->buildclk
= get_tod_clock();
3613 cqr
->status
= DASD_CQR_FILLED
;
3615 rc
= dasd_sleep_on_immediatly(cqr
);
3617 clear_bit(DASD_FLAG_IS_RESERVED
, &device
->flags
);
3620 mutex_unlock(&dasd_reserve_mutex
);
3622 dasd_sfree_request(cqr
, cqr
->memdev
);
3627 * Reserve device ioctl.
3628 * Options are set to 'synchronous wait for interrupt' and
3629 * 'timeout the request'. This leads to a terminate IO if
3630 * the interrupt is outstanding for a certain time.
3633 dasd_eckd_reserve(struct dasd_device
*device
)
3635 struct dasd_ccw_req
*cqr
;
3640 if (!capable(CAP_SYS_ADMIN
))
3644 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1, 32, device
);
3646 mutex_lock(&dasd_reserve_mutex
);
3648 cqr
= &dasd_reserve_req
->cqr
;
3649 memset(cqr
, 0, sizeof(*cqr
));
3650 memset(&dasd_reserve_req
->ccw
, 0,
3651 sizeof(dasd_reserve_req
->ccw
));
3652 cqr
->cpaddr
= &dasd_reserve_req
->ccw
;
3653 cqr
->data
= &dasd_reserve_req
->data
;
3654 cqr
->magic
= DASD_ECKD_MAGIC
;
3657 ccw
->cmd_code
= DASD_ECKD_CCW_RESERVE
;
3658 ccw
->flags
|= CCW_FLAG_SLI
;
3660 ccw
->cda
= (__u32
)(addr_t
) cqr
->data
;
3661 cqr
->startdev
= device
;
3662 cqr
->memdev
= device
;
3663 clear_bit(DASD_CQR_FLAGS_USE_ERP
, &cqr
->flags
);
3664 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
3665 cqr
->retries
= 2; /* set retry counter to enable basic ERP */
3666 cqr
->expires
= 2 * HZ
;
3667 cqr
->buildclk
= get_tod_clock();
3668 cqr
->status
= DASD_CQR_FILLED
;
3670 rc
= dasd_sleep_on_immediatly(cqr
);
3672 set_bit(DASD_FLAG_IS_RESERVED
, &device
->flags
);
3675 mutex_unlock(&dasd_reserve_mutex
);
3677 dasd_sfree_request(cqr
, cqr
->memdev
);
3682 * Steal lock ioctl - unconditional reserve device.
3683 * Buils a channel programm to break a device's reservation.
3684 * (unconditional reserve)
3687 dasd_eckd_steal_lock(struct dasd_device
*device
)
3689 struct dasd_ccw_req
*cqr
;
3694 if (!capable(CAP_SYS_ADMIN
))
3698 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1, 32, device
);
3700 mutex_lock(&dasd_reserve_mutex
);
3702 cqr
= &dasd_reserve_req
->cqr
;
3703 memset(cqr
, 0, sizeof(*cqr
));
3704 memset(&dasd_reserve_req
->ccw
, 0,
3705 sizeof(dasd_reserve_req
->ccw
));
3706 cqr
->cpaddr
= &dasd_reserve_req
->ccw
;
3707 cqr
->data
= &dasd_reserve_req
->data
;
3708 cqr
->magic
= DASD_ECKD_MAGIC
;
3711 ccw
->cmd_code
= DASD_ECKD_CCW_SLCK
;
3712 ccw
->flags
|= CCW_FLAG_SLI
;
3714 ccw
->cda
= (__u32
)(addr_t
) cqr
->data
;
3715 cqr
->startdev
= device
;
3716 cqr
->memdev
= device
;
3717 clear_bit(DASD_CQR_FLAGS_USE_ERP
, &cqr
->flags
);
3718 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
3719 cqr
->retries
= 2; /* set retry counter to enable basic ERP */
3720 cqr
->expires
= 2 * HZ
;
3721 cqr
->buildclk
= get_tod_clock();
3722 cqr
->status
= DASD_CQR_FILLED
;
3724 rc
= dasd_sleep_on_immediatly(cqr
);
3726 set_bit(DASD_FLAG_IS_RESERVED
, &device
->flags
);
3729 mutex_unlock(&dasd_reserve_mutex
);
3731 dasd_sfree_request(cqr
, cqr
->memdev
);
3736 * SNID - Sense Path Group ID
3737 * This ioctl may be used in situations where I/O is stalled due to
3738 * a reserve, so if the normal dasd_smalloc_request fails, we use the
3739 * preallocated dasd_reserve_req.
3741 static int dasd_eckd_snid(struct dasd_device
*device
,
3744 struct dasd_ccw_req
*cqr
;
3748 struct dasd_snid_ioctl_data usrparm
;
3750 if (!capable(CAP_SYS_ADMIN
))
3753 if (copy_from_user(&usrparm
, argp
, sizeof(usrparm
)))
3757 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1,
3758 sizeof(struct dasd_snid_data
), device
);
3760 mutex_lock(&dasd_reserve_mutex
);
3762 cqr
= &dasd_reserve_req
->cqr
;
3763 memset(cqr
, 0, sizeof(*cqr
));
3764 memset(&dasd_reserve_req
->ccw
, 0,
3765 sizeof(dasd_reserve_req
->ccw
));
3766 cqr
->cpaddr
= &dasd_reserve_req
->ccw
;
3767 cqr
->data
= &dasd_reserve_req
->data
;
3768 cqr
->magic
= DASD_ECKD_MAGIC
;
3771 ccw
->cmd_code
= DASD_ECKD_CCW_SNID
;
3772 ccw
->flags
|= CCW_FLAG_SLI
;
3774 ccw
->cda
= (__u32
)(addr_t
) cqr
->data
;
3775 cqr
->startdev
= device
;
3776 cqr
->memdev
= device
;
3777 clear_bit(DASD_CQR_FLAGS_USE_ERP
, &cqr
->flags
);
3778 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
3779 set_bit(DASD_CQR_ALLOW_SLOCK
, &cqr
->flags
);
3781 cqr
->expires
= 10 * HZ
;
3782 cqr
->buildclk
= get_tod_clock();
3783 cqr
->status
= DASD_CQR_FILLED
;
3784 cqr
->lpm
= usrparm
.path_mask
;
3786 rc
= dasd_sleep_on_immediatly(cqr
);
3787 /* verify that I/O processing didn't modify the path mask */
3788 if (!rc
&& usrparm
.path_mask
&& (cqr
->lpm
!= usrparm
.path_mask
))
3791 usrparm
.data
= *((struct dasd_snid_data
*)cqr
->data
);
3792 if (copy_to_user(argp
, &usrparm
, sizeof(usrparm
)))
3797 mutex_unlock(&dasd_reserve_mutex
);
3799 dasd_sfree_request(cqr
, cqr
->memdev
);
3804 * Read performance statistics
3807 dasd_eckd_performance(struct dasd_device
*device
, void __user
*argp
)
3809 struct dasd_psf_prssd_data
*prssdp
;
3810 struct dasd_rssd_perf_stats_t
*stats
;
3811 struct dasd_ccw_req
*cqr
;
3815 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1 /* PSF */ + 1 /* RSSD */,
3816 (sizeof(struct dasd_psf_prssd_data
) +
3817 sizeof(struct dasd_rssd_perf_stats_t
)),
3820 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
3821 "Could not allocate initialization request");
3822 return PTR_ERR(cqr
);
3824 cqr
->startdev
= device
;
3825 cqr
->memdev
= device
;
3827 clear_bit(DASD_CQR_FLAGS_USE_ERP
, &cqr
->flags
);
3828 cqr
->expires
= 10 * HZ
;
3830 /* Prepare for Read Subsystem Data */
3831 prssdp
= (struct dasd_psf_prssd_data
*) cqr
->data
;
3832 memset(prssdp
, 0, sizeof(struct dasd_psf_prssd_data
));
3833 prssdp
->order
= PSF_ORDER_PRSSD
;
3834 prssdp
->suborder
= 0x01; /* Performance Statistics */
3835 prssdp
->varies
[1] = 0x01; /* Perf Statistics for the Subsystem */
3838 ccw
->cmd_code
= DASD_ECKD_CCW_PSF
;
3839 ccw
->count
= sizeof(struct dasd_psf_prssd_data
);
3840 ccw
->flags
|= CCW_FLAG_CC
;
3841 ccw
->cda
= (__u32
)(addr_t
) prssdp
;
3843 /* Read Subsystem Data - Performance Statistics */
3844 stats
= (struct dasd_rssd_perf_stats_t
*) (prssdp
+ 1);
3845 memset(stats
, 0, sizeof(struct dasd_rssd_perf_stats_t
));
3848 ccw
->cmd_code
= DASD_ECKD_CCW_RSSD
;
3849 ccw
->count
= sizeof(struct dasd_rssd_perf_stats_t
);
3850 ccw
->cda
= (__u32
)(addr_t
) stats
;
3852 cqr
->buildclk
= get_tod_clock();
3853 cqr
->status
= DASD_CQR_FILLED
;
3854 rc
= dasd_sleep_on(cqr
);
3856 prssdp
= (struct dasd_psf_prssd_data
*) cqr
->data
;
3857 stats
= (struct dasd_rssd_perf_stats_t
*) (prssdp
+ 1);
3858 if (copy_to_user(argp
, stats
,
3859 sizeof(struct dasd_rssd_perf_stats_t
)))
3862 dasd_sfree_request(cqr
, cqr
->memdev
);
3867 * Get attributes (cache operations)
3868 * Returnes the cache attributes used in Define Extend (DE).
3871 dasd_eckd_get_attrib(struct dasd_device
*device
, void __user
*argp
)
3873 struct dasd_eckd_private
*private =
3874 (struct dasd_eckd_private
*)device
->private;
3875 struct attrib_data_t attrib
= private->attrib
;
3878 if (!capable(CAP_SYS_ADMIN
))
3884 if (copy_to_user(argp
, (long *) &attrib
,
3885 sizeof(struct attrib_data_t
)))
3892 * Set attributes (cache operations)
3893 * Stores the attributes for cache operation to be used in Define Extend (DE).
3896 dasd_eckd_set_attrib(struct dasd_device
*device
, void __user
*argp
)
3898 struct dasd_eckd_private
*private =
3899 (struct dasd_eckd_private
*)device
->private;
3900 struct attrib_data_t attrib
;
3902 if (!capable(CAP_SYS_ADMIN
))
3907 if (copy_from_user(&attrib
, argp
, sizeof(struct attrib_data_t
)))
3909 private->attrib
= attrib
;
3911 dev_info(&device
->cdev
->dev
,
3912 "The DASD cache mode was set to %x (%i cylinder prestage)\n",
3913 private->attrib
.operation
, private->attrib
.nr_cyl
);
3918 * Issue syscall I/O to EMC Symmetrix array.
3919 * CCWs are PSF and RSSD
3921 static int dasd_symm_io(struct dasd_device
*device
, void __user
*argp
)
3923 struct dasd_symmio_parms usrparm
;
3924 char *psf_data
, *rssd_result
;
3925 struct dasd_ccw_req
*cqr
;
3930 if (!capable(CAP_SYS_ADMIN
) && !capable(CAP_SYS_RAWIO
))
3934 /* Copy parms from caller */
3936 if (copy_from_user(&usrparm
, argp
, sizeof(usrparm
)))
3938 if (is_compat_task() || sizeof(long) == 4) {
3939 /* Make sure pointers are sane even on 31 bit. */
3941 if ((usrparm
.psf_data
>> 32) != 0)
3943 if ((usrparm
.rssd_result
>> 32) != 0)
3945 usrparm
.psf_data
&= 0x7fffffffULL
;
3946 usrparm
.rssd_result
&= 0x7fffffffULL
;
3948 /* alloc I/O data area */
3949 psf_data
= kzalloc(usrparm
.psf_data_len
, GFP_KERNEL
| GFP_DMA
);
3950 rssd_result
= kzalloc(usrparm
.rssd_result_len
, GFP_KERNEL
| GFP_DMA
);
3951 if (!psf_data
|| !rssd_result
) {
3956 /* get syscall header from user space */
3958 if (copy_from_user(psf_data
,
3959 (void __user
*)(unsigned long) usrparm
.psf_data
,
3960 usrparm
.psf_data_len
))
3965 /* setup CCWs for PSF + RSSD */
3966 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 2 , 0, device
);
3968 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
3969 "Could not allocate initialization request");
3974 cqr
->startdev
= device
;
3975 cqr
->memdev
= device
;
3977 cqr
->expires
= 10 * HZ
;
3978 cqr
->buildclk
= get_tod_clock();
3979 cqr
->status
= DASD_CQR_FILLED
;
3981 /* Build the ccws */
3985 ccw
->cmd_code
= DASD_ECKD_CCW_PSF
;
3986 ccw
->count
= usrparm
.psf_data_len
;
3987 ccw
->flags
|= CCW_FLAG_CC
;
3988 ccw
->cda
= (__u32
)(addr_t
) psf_data
;
3993 ccw
->cmd_code
= DASD_ECKD_CCW_RSSD
;
3994 ccw
->count
= usrparm
.rssd_result_len
;
3995 ccw
->flags
= CCW_FLAG_SLI
;
3996 ccw
->cda
= (__u32
)(addr_t
) rssd_result
;
3998 rc
= dasd_sleep_on(cqr
);
4003 if (copy_to_user((void __user
*)(unsigned long) usrparm
.rssd_result
,
4004 rssd_result
, usrparm
.rssd_result_len
))
4009 dasd_sfree_request(cqr
, cqr
->memdev
);
4014 DBF_DEV_EVENT(DBF_WARNING
, device
,
4015 "Symmetrix ioctl (0x%02x 0x%02x): rc=%d",
4016 (int) psf0
, (int) psf1
, rc
);
4021 dasd_eckd_ioctl(struct dasd_block
*block
, unsigned int cmd
, void __user
*argp
)
4023 struct dasd_device
*device
= block
->base
;
4027 return dasd_eckd_get_attrib(device
, argp
);
4029 return dasd_eckd_set_attrib(device
, argp
);
4031 return dasd_eckd_performance(device
, argp
);
4033 return dasd_eckd_release(device
);
4035 return dasd_eckd_reserve(device
);
4037 return dasd_eckd_steal_lock(device
);
4039 return dasd_eckd_snid(device
, argp
);
4041 return dasd_symm_io(device
, argp
);
4048 * Dump the range of CCWs into 'page' buffer
4049 * and return number of printed chars.
4052 dasd_eckd_dump_ccw_range(struct ccw1
*from
, struct ccw1
*to
, char *page
)
4058 while (from
<= to
) {
4059 len
+= sprintf(page
+ len
, PRINTK_HEADER
4060 " CCW %p: %08X %08X DAT:",
4061 from
, ((int *) from
)[0], ((int *) from
)[1]);
4063 /* get pointer to data (consider IDALs) */
4064 if (from
->flags
& CCW_FLAG_IDA
)
4065 datap
= (char *) *((addr_t
*) (addr_t
) from
->cda
);
4067 datap
= (char *) ((addr_t
) from
->cda
);
4069 /* dump data (max 32 bytes) */
4070 for (count
= 0; count
< from
->count
&& count
< 32; count
++) {
4071 if (count
% 8 == 0) len
+= sprintf(page
+ len
, " ");
4072 if (count
% 4 == 0) len
+= sprintf(page
+ len
, " ");
4073 len
+= sprintf(page
+ len
, "%02x", datap
[count
]);
4075 len
+= sprintf(page
+ len
, "\n");
4082 dasd_eckd_dump_sense_dbf(struct dasd_device
*device
, struct irb
*irb
,
4088 sense
= (u64
*) dasd_get_sense(irb
);
4089 stat
= (u64
*) &irb
->scsw
;
4091 DBF_DEV_EVENT(DBF_EMERG
, device
, "%s: %016llx %08x : "
4092 "%016llx %016llx %016llx %016llx",
4093 reason
, *stat
, *((u32
*) (stat
+ 1)),
4094 sense
[0], sense
[1], sense
[2], sense
[3]);
4096 DBF_DEV_EVENT(DBF_EMERG
, device
, "%s: %016llx %08x : %s",
4097 reason
, *stat
, *((u32
*) (stat
+ 1)),
4103 * Print sense data and related channel program.
4104 * Parts are printed because printk buffer is only 1024 bytes.
4106 static void dasd_eckd_dump_sense_ccw(struct dasd_device
*device
,
4107 struct dasd_ccw_req
*req
, struct irb
*irb
)
4110 struct ccw1
*first
, *last
, *fail
, *from
, *to
;
4113 page
= (char *) get_zeroed_page(GFP_ATOMIC
);
4115 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
4116 "No memory to dump sense data\n");
4119 /* dump the sense data */
4120 len
= sprintf(page
, PRINTK_HEADER
4121 " I/O status report for device %s:\n",
4122 dev_name(&device
->cdev
->dev
));
4123 len
+= sprintf(page
+ len
, PRINTK_HEADER
4124 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X "
4126 req
, scsw_cc(&irb
->scsw
), scsw_fctl(&irb
->scsw
),
4127 scsw_actl(&irb
->scsw
), scsw_stctl(&irb
->scsw
),
4128 scsw_dstat(&irb
->scsw
), scsw_cstat(&irb
->scsw
),
4129 req
? req
->intrc
: 0);
4130 len
+= sprintf(page
+ len
, PRINTK_HEADER
4131 " device %s: Failing CCW: %p\n",
4132 dev_name(&device
->cdev
->dev
),
4133 (void *) (addr_t
) irb
->scsw
.cmd
.cpa
);
4134 if (irb
->esw
.esw0
.erw
.cons
) {
4135 for (sl
= 0; sl
< 4; sl
++) {
4136 len
+= sprintf(page
+ len
, PRINTK_HEADER
4137 " Sense(hex) %2d-%2d:",
4138 (8 * sl
), ((8 * sl
) + 7));
4140 for (sct
= 0; sct
< 8; sct
++) {
4141 len
+= sprintf(page
+ len
, " %02x",
4142 irb
->ecw
[8 * sl
+ sct
]);
4144 len
+= sprintf(page
+ len
, "\n");
4147 if (irb
->ecw
[27] & DASD_SENSE_BIT_0
) {
4148 /* 24 Byte Sense Data */
4149 sprintf(page
+ len
, PRINTK_HEADER
4150 " 24 Byte: %x MSG %x, "
4151 "%s MSGb to SYSOP\n",
4152 irb
->ecw
[7] >> 4, irb
->ecw
[7] & 0x0f,
4153 irb
->ecw
[1] & 0x10 ? "" : "no");
4155 /* 32 Byte Sense Data */
4156 sprintf(page
+ len
, PRINTK_HEADER
4157 " 32 Byte: Format: %x "
4158 "Exception class %x\n",
4159 irb
->ecw
[6] & 0x0f, irb
->ecw
[22] >> 4);
4162 sprintf(page
+ len
, PRINTK_HEADER
4163 " SORRY - NO VALID SENSE AVAILABLE\n");
4165 printk(KERN_ERR
"%s", page
);
4168 /* req == NULL for unsolicited interrupts */
4169 /* dump the Channel Program (max 140 Bytes per line) */
4170 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */
4171 first
= req
->cpaddr
;
4172 for (last
= first
; last
->flags
& (CCW_FLAG_CC
| CCW_FLAG_DC
); last
++);
4173 to
= min(first
+ 6, last
);
4174 len
= sprintf(page
, PRINTK_HEADER
4175 " Related CP in req: %p\n", req
);
4176 dasd_eckd_dump_ccw_range(first
, to
, page
+ len
);
4177 printk(KERN_ERR
"%s", page
);
4179 /* print failing CCW area (maximum 4) */
4180 /* scsw->cda is either valid or zero */
4183 fail
= (struct ccw1
*)(addr_t
)
4184 irb
->scsw
.cmd
.cpa
; /* failing CCW */
4185 if (from
< fail
- 2) {
4186 from
= fail
- 2; /* there is a gap - print header */
4187 len
+= sprintf(page
, PRINTK_HEADER
"......\n");
4189 to
= min(fail
+ 1, last
);
4190 len
+= dasd_eckd_dump_ccw_range(from
, to
, page
+ len
);
4192 /* print last CCWs (maximum 2) */
4193 from
= max(from
, ++to
);
4194 if (from
< last
- 1) {
4195 from
= last
- 1; /* there is a gap - print header */
4196 len
+= sprintf(page
+ len
, PRINTK_HEADER
"......\n");
4198 len
+= dasd_eckd_dump_ccw_range(from
, last
, page
+ len
);
4200 printk(KERN_ERR
"%s", page
);
4202 free_page((unsigned long) page
);
4207 * Print sense data from a tcw.
4209 static void dasd_eckd_dump_sense_tcw(struct dasd_device
*device
,
4210 struct dasd_ccw_req
*req
, struct irb
*irb
)
4213 int len
, sl
, sct
, residual
;
4217 page
= (char *) get_zeroed_page(GFP_ATOMIC
);
4219 DBF_DEV_EVENT(DBF_WARNING
, device
, " %s",
4220 "No memory to dump sense data");
4223 /* dump the sense data */
4224 len
= sprintf(page
, PRINTK_HEADER
4225 " I/O status report for device %s:\n",
4226 dev_name(&device
->cdev
->dev
));
4227 len
+= sprintf(page
+ len
, PRINTK_HEADER
4228 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X "
4229 "CS:%02X fcxs:%02X schxs:%02X RC:%d\n",
4230 req
, scsw_cc(&irb
->scsw
), scsw_fctl(&irb
->scsw
),
4231 scsw_actl(&irb
->scsw
), scsw_stctl(&irb
->scsw
),
4232 scsw_dstat(&irb
->scsw
), scsw_cstat(&irb
->scsw
),
4233 irb
->scsw
.tm
.fcxs
, irb
->scsw
.tm
.schxs
,
4234 req
? req
->intrc
: 0);
4235 len
+= sprintf(page
+ len
, PRINTK_HEADER
4236 " device %s: Failing TCW: %p\n",
4237 dev_name(&device
->cdev
->dev
),
4238 (void *) (addr_t
) irb
->scsw
.tm
.tcw
);
4242 if (irb
->scsw
.tm
.tcw
&& (irb
->scsw
.tm
.fcxs
& 0x01))
4244 (struct tcw
*)(unsigned long)irb
->scsw
.tm
.tcw
);
4247 len
+= sprintf(page
+ len
, PRINTK_HEADER
4248 " tsb->length %d\n", tsb
->length
);
4249 len
+= sprintf(page
+ len
, PRINTK_HEADER
4250 " tsb->flags %x\n", tsb
->flags
);
4251 len
+= sprintf(page
+ len
, PRINTK_HEADER
4252 " tsb->dcw_offset %d\n", tsb
->dcw_offset
);
4253 len
+= sprintf(page
+ len
, PRINTK_HEADER
4254 " tsb->count %d\n", tsb
->count
);
4255 residual
= tsb
->count
- 28;
4256 len
+= sprintf(page
+ len
, PRINTK_HEADER
4257 " residual %d\n", residual
);
4259 switch (tsb
->flags
& 0x07) {
4260 case 1: /* tsa_iostat */
4261 len
+= sprintf(page
+ len
, PRINTK_HEADER
4262 " tsb->tsa.iostat.dev_time %d\n",
4263 tsb
->tsa
.iostat
.dev_time
);
4264 len
+= sprintf(page
+ len
, PRINTK_HEADER
4265 " tsb->tsa.iostat.def_time %d\n",
4266 tsb
->tsa
.iostat
.def_time
);
4267 len
+= sprintf(page
+ len
, PRINTK_HEADER
4268 " tsb->tsa.iostat.queue_time %d\n",
4269 tsb
->tsa
.iostat
.queue_time
);
4270 len
+= sprintf(page
+ len
, PRINTK_HEADER
4271 " tsb->tsa.iostat.dev_busy_time %d\n",
4272 tsb
->tsa
.iostat
.dev_busy_time
);
4273 len
+= sprintf(page
+ len
, PRINTK_HEADER
4274 " tsb->tsa.iostat.dev_act_time %d\n",
4275 tsb
->tsa
.iostat
.dev_act_time
);
4276 sense
= tsb
->tsa
.iostat
.sense
;
4278 case 2: /* ts_ddpc */
4279 len
+= sprintf(page
+ len
, PRINTK_HEADER
4280 " tsb->tsa.ddpc.rc %d\n", tsb
->tsa
.ddpc
.rc
);
4281 for (sl
= 0; sl
< 2; sl
++) {
4282 len
+= sprintf(page
+ len
, PRINTK_HEADER
4283 " tsb->tsa.ddpc.rcq %2d-%2d: ",
4284 (8 * sl
), ((8 * sl
) + 7));
4285 rcq
= tsb
->tsa
.ddpc
.rcq
;
4286 for (sct
= 0; sct
< 8; sct
++) {
4287 len
+= sprintf(page
+ len
, " %02x",
4290 len
+= sprintf(page
+ len
, "\n");
4292 sense
= tsb
->tsa
.ddpc
.sense
;
4294 case 3: /* tsa_intrg */
4295 len
+= sprintf(page
+ len
, PRINTK_HEADER
4296 " tsb->tsa.intrg.: not supportet yet\n");
4301 for (sl
= 0; sl
< 4; sl
++) {
4302 len
+= sprintf(page
+ len
, PRINTK_HEADER
4303 " Sense(hex) %2d-%2d:",
4304 (8 * sl
), ((8 * sl
) + 7));
4305 for (sct
= 0; sct
< 8; sct
++) {
4306 len
+= sprintf(page
+ len
, " %02x",
4307 sense
[8 * sl
+ sct
]);
4309 len
+= sprintf(page
+ len
, "\n");
4312 if (sense
[27] & DASD_SENSE_BIT_0
) {
4313 /* 24 Byte Sense Data */
4314 sprintf(page
+ len
, PRINTK_HEADER
4315 " 24 Byte: %x MSG %x, "
4316 "%s MSGb to SYSOP\n",
4317 sense
[7] >> 4, sense
[7] & 0x0f,
4318 sense
[1] & 0x10 ? "" : "no");
4320 /* 32 Byte Sense Data */
4321 sprintf(page
+ len
, PRINTK_HEADER
4322 " 32 Byte: Format: %x "
4323 "Exception class %x\n",
4324 sense
[6] & 0x0f, sense
[22] >> 4);
4327 sprintf(page
+ len
, PRINTK_HEADER
4328 " SORRY - NO VALID SENSE AVAILABLE\n");
4331 sprintf(page
+ len
, PRINTK_HEADER
4332 " SORRY - NO TSB DATA AVAILABLE\n");
4334 printk(KERN_ERR
"%s", page
);
4335 free_page((unsigned long) page
);
4338 static void dasd_eckd_dump_sense(struct dasd_device
*device
,
4339 struct dasd_ccw_req
*req
, struct irb
*irb
)
4341 if (scsw_is_tm(&irb
->scsw
))
4342 dasd_eckd_dump_sense_tcw(device
, req
, irb
);
4344 dasd_eckd_dump_sense_ccw(device
, req
, irb
);
4347 static int dasd_eckd_pm_freeze(struct dasd_device
*device
)
4350 * the device should be disconnected from our LCU structure
4351 * on restore we will reconnect it and reread LCU specific
4352 * information like PAV support that might have changed
4354 dasd_alias_remove_device(device
);
4355 dasd_alias_disconnect_device_from_lcu(device
);
4360 static int dasd_eckd_restore_device(struct dasd_device
*device
)
4362 struct dasd_eckd_private
*private;
4363 struct dasd_eckd_characteristics temp_rdc_data
;
4365 struct dasd_uid temp_uid
;
4366 unsigned long flags
;
4367 unsigned long cqr_flags
= 0;
4369 private = (struct dasd_eckd_private
*) device
->private;
4371 /* Read Configuration Data */
4372 dasd_eckd_read_conf(device
);
4374 dasd_eckd_get_uid(device
, &temp_uid
);
4375 /* Generate device unique id */
4376 rc
= dasd_eckd_generate_uid(device
);
4377 spin_lock_irqsave(get_ccwdev_lock(device
->cdev
), flags
);
4378 if (memcmp(&private->uid
, &temp_uid
, sizeof(struct dasd_uid
)) != 0)
4379 dev_err(&device
->cdev
->dev
, "The UID of the DASD has "
4381 spin_unlock_irqrestore(get_ccwdev_lock(device
->cdev
), flags
);
4385 /* register lcu with alias handling, enable PAV if this is a new lcu */
4386 rc
= dasd_alias_make_device_known_to_lcu(device
);
4390 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr_flags
);
4391 dasd_eckd_validate_server(device
, cqr_flags
);
4393 /* RE-Read Configuration Data */
4394 dasd_eckd_read_conf(device
);
4396 /* Read Feature Codes */
4397 dasd_eckd_read_features(device
);
4399 /* Read Device Characteristics */
4400 rc
= dasd_generic_read_dev_chars(device
, DASD_ECKD_MAGIC
,
4401 &temp_rdc_data
, 64);
4403 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
,
4404 "Read device characteristic failed, rc=%d", rc
);
4407 spin_lock_irqsave(get_ccwdev_lock(device
->cdev
), flags
);
4408 memcpy(&private->rdc_data
, &temp_rdc_data
, sizeof(temp_rdc_data
));
4409 spin_unlock_irqrestore(get_ccwdev_lock(device
->cdev
), flags
);
4411 /* add device to alias management */
4412 dasd_alias_add_device(device
);
4420 static int dasd_eckd_reload_device(struct dasd_device
*device
)
4422 struct dasd_eckd_private
*private;
4425 struct dasd_uid uid
;
4426 unsigned long flags
;
4428 private = (struct dasd_eckd_private
*) device
->private;
4430 spin_lock_irqsave(get_ccwdev_lock(device
->cdev
), flags
);
4431 old_base
= private->uid
.base_unit_addr
;
4432 spin_unlock_irqrestore(get_ccwdev_lock(device
->cdev
), flags
);
4434 /* Read Configuration Data */
4435 rc
= dasd_eckd_read_conf(device
);
4439 rc
= dasd_eckd_generate_uid(device
);
4443 * update unit address configuration and
4444 * add device to alias management
4446 dasd_alias_update_add_device(device
);
4448 dasd_eckd_get_uid(device
, &uid
);
4450 if (old_base
!= uid
.base_unit_addr
) {
4451 if (strlen(uid
.vduit
) > 0)
4452 snprintf(print_uid
, sizeof(print_uid
),
4453 "%s.%s.%04x.%02x.%s", uid
.vendor
, uid
.serial
,
4454 uid
.ssid
, uid
.base_unit_addr
, uid
.vduit
);
4456 snprintf(print_uid
, sizeof(print_uid
),
4457 "%s.%s.%04x.%02x", uid
.vendor
, uid
.serial
,
4458 uid
.ssid
, uid
.base_unit_addr
);
4460 dev_info(&device
->cdev
->dev
,
4461 "An Alias device was reassigned to a new base device "
4462 "with UID: %s\n", print_uid
);
4470 static struct ccw_driver dasd_eckd_driver
= {
4472 .name
= "dasd-eckd",
4473 .owner
= THIS_MODULE
,
4475 .ids
= dasd_eckd_ids
,
4476 .probe
= dasd_eckd_probe
,
4477 .remove
= dasd_generic_remove
,
4478 .set_offline
= dasd_generic_set_offline
,
4479 .set_online
= dasd_eckd_set_online
,
4480 .notify
= dasd_generic_notify
,
4481 .path_event
= dasd_generic_path_event
,
4482 .shutdown
= dasd_generic_shutdown
,
4483 .freeze
= dasd_generic_pm_freeze
,
4484 .thaw
= dasd_generic_restore_device
,
4485 .restore
= dasd_generic_restore_device
,
4486 .uc_handler
= dasd_generic_uc_handler
,
4487 .int_class
= IRQIO_DAS
,
4491 * max_blocks is dependent on the amount of storage that is available
4492 * in the static io buffer for each device. Currently each device has
4493 * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has
4494 * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use
4495 * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In
4496 * addition we have one define extent ccw + 16 bytes of data and one
4497 * locate record ccw + 16 bytes of data. That makes:
4498 * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum.
4499 * We want to fit two into the available memory so that we can immediately
4500 * start the next request if one finishes off. That makes 249.5 blocks
4501 * for one request. Give a little safety and the result is 240.
4503 static struct dasd_discipline dasd_eckd_discipline
= {
4504 .owner
= THIS_MODULE
,
4508 .check_device
= dasd_eckd_check_characteristics
,
4509 .uncheck_device
= dasd_eckd_uncheck_device
,
4510 .do_analysis
= dasd_eckd_do_analysis
,
4511 .verify_path
= dasd_eckd_verify_path
,
4512 .basic_to_ready
= dasd_eckd_basic_to_ready
,
4513 .online_to_ready
= dasd_eckd_online_to_ready
,
4514 .ready_to_basic
= dasd_eckd_ready_to_basic
,
4515 .fill_geometry
= dasd_eckd_fill_geometry
,
4516 .start_IO
= dasd_start_IO
,
4517 .term_IO
= dasd_term_IO
,
4518 .handle_terminated_request
= dasd_eckd_handle_terminated_request
,
4519 .format_device
= dasd_eckd_format_device
,
4520 .erp_action
= dasd_eckd_erp_action
,
4521 .erp_postaction
= dasd_eckd_erp_postaction
,
4522 .check_for_device_change
= dasd_eckd_check_for_device_change
,
4523 .build_cp
= dasd_eckd_build_alias_cp
,
4524 .free_cp
= dasd_eckd_free_alias_cp
,
4525 .dump_sense
= dasd_eckd_dump_sense
,
4526 .dump_sense_dbf
= dasd_eckd_dump_sense_dbf
,
4527 .fill_info
= dasd_eckd_fill_info
,
4528 .ioctl
= dasd_eckd_ioctl
,
4529 .freeze
= dasd_eckd_pm_freeze
,
4530 .restore
= dasd_eckd_restore_device
,
4531 .reload
= dasd_eckd_reload_device
,
4532 .get_uid
= dasd_eckd_get_uid
,
4533 .kick_validate
= dasd_eckd_kick_validate_server
,
4537 dasd_eckd_init(void)
4541 ASCEBC(dasd_eckd_discipline
.ebcname
, 4);
4542 dasd_reserve_req
= kmalloc(sizeof(*dasd_reserve_req
),
4543 GFP_KERNEL
| GFP_DMA
);
4544 if (!dasd_reserve_req
)
4546 path_verification_worker
= kmalloc(sizeof(*path_verification_worker
),
4547 GFP_KERNEL
| GFP_DMA
);
4548 if (!path_verification_worker
) {
4549 kfree(dasd_reserve_req
);
4552 rawpadpage
= (void *)__get_free_page(GFP_KERNEL
);
4554 kfree(path_verification_worker
);
4555 kfree(dasd_reserve_req
);
4558 ret
= ccw_driver_register(&dasd_eckd_driver
);
4560 wait_for_device_probe();
4562 kfree(path_verification_worker
);
4563 kfree(dasd_reserve_req
);
4564 free_page((unsigned long)rawpadpage
);
4570 dasd_eckd_cleanup(void)
4572 ccw_driver_unregister(&dasd_eckd_driver
);
4573 kfree(path_verification_worker
);
4574 kfree(dasd_reserve_req
);
4575 free_page((unsigned long)rawpadpage
);
4578 module_init(dasd_eckd_init
);
4579 module_exit(dasd_eckd_cleanup
);