2 * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
3 * Horst Hummel <Horst.Hummel@de.ibm.com>
4 * Carsten Otte <Cotte@de.ibm.com>
5 * Martin Schwidefsky <schwidefsky@de.ibm.com>
6 * Bugreports.to..: <Linux390@de.ibm.com>
7 * Copyright IBM Corp. 1999, 2009
8 * EMC Symmetrix ioctl Copyright EMC Corporation, 2008
9 * Author.........: Nigel Hislop <hislop_nigel@emc.com>
12 #define KMSG_COMPONENT "dasd-eckd"
14 #include <linux/stddef.h>
15 #include <linux/kernel.h>
16 #include <linux/slab.h>
17 #include <linux/hdreg.h> /* HDIO_GETGEO */
18 #include <linux/bio.h>
19 #include <linux/module.h>
20 #include <linux/compat.h>
21 #include <linux/init.h>
23 #include <asm/css_chars.h>
24 #include <asm/debug.h>
25 #include <asm/idals.h>
26 #include <asm/ebcdic.h>
28 #include <asm/uaccess.h>
30 #include <asm/ccwdev.h>
32 #include <asm/schid.h>
33 #include <asm/chpid.h>
36 #include "dasd_eckd.h"
40 #endif /* PRINTK_HEADER */
41 #define PRINTK_HEADER "dasd(eckd):"
43 #define ECKD_C0(i) (i->home_bytes)
44 #define ECKD_F(i) (i->formula)
45 #define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\
46 (i->factors.f_0x02.f1))
47 #define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\
48 (i->factors.f_0x02.f2))
49 #define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\
50 (i->factors.f_0x02.f3))
51 #define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0)
52 #define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0)
53 #define ECKD_F6(i) (i->factor6)
54 #define ECKD_F7(i) (i->factor7)
55 #define ECKD_F8(i) (i->factor8)
58 * raw track access always map to 64k in memory
59 * so it maps to 16 blocks of 4k per track
61 #define DASD_RAW_BLOCK_PER_TRACK 16
62 #define DASD_RAW_BLOCKSIZE 4096
63 /* 64k are 128 x 512 byte sectors */
64 #define DASD_RAW_SECTORS_PER_TRACK 128
66 MODULE_LICENSE("GPL");
68 static struct dasd_discipline dasd_eckd_discipline
;
70 /* The ccw bus type uses this table to find devices that it sends to
72 static struct ccw_device_id dasd_eckd_ids
[] = {
73 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info
= 0x1},
74 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info
= 0x2},
75 { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3380, 0), .driver_info
= 0x3},
76 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info
= 0x4},
77 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info
= 0x5},
78 { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info
= 0x6},
79 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info
= 0x7},
80 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info
= 0x8},
81 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info
= 0x9},
82 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info
= 0xa},
83 { /* end of list */ },
86 MODULE_DEVICE_TABLE(ccw
, dasd_eckd_ids
);
88 static struct ccw_driver dasd_eckd_driver
; /* see below */
90 static void *rawpadpage
;
93 #define INIT_CQR_UNFORMATTED 1
94 #define INIT_CQR_ERROR 2
96 /* emergency request for reserve/release */
98 struct dasd_ccw_req cqr
;
102 static DEFINE_MUTEX(dasd_reserve_mutex
);
104 /* definitions for the path verification worker */
105 struct path_verification_work_data
{
106 struct work_struct worker
;
107 struct dasd_device
*device
;
108 struct dasd_ccw_req cqr
;
110 __u8 rcd_buffer
[DASD_ECKD_RCD_DATA_SIZE
];
114 static struct path_verification_work_data
*path_verification_worker
;
115 static DEFINE_MUTEX(dasd_path_verification_mutex
);
117 struct check_attention_work_data
{
118 struct work_struct worker
;
119 struct dasd_device
*device
;
123 /* initial attempt at a probe function. this can be simplified once
124 * the other detection code is gone */
126 dasd_eckd_probe (struct ccw_device
*cdev
)
130 /* set ECKD specific ccw-device options */
131 ret
= ccw_device_set_options(cdev
, CCWDEV_ALLOW_FORCE
|
132 CCWDEV_DO_PATHGROUP
| CCWDEV_DO_MULTIPATH
);
134 DBF_EVENT_DEVID(DBF_WARNING
, cdev
, "%s",
135 "dasd_eckd_probe: could not set "
136 "ccw-device options");
139 ret
= dasd_generic_probe(cdev
, &dasd_eckd_discipline
);
144 dasd_eckd_set_online(struct ccw_device
*cdev
)
146 return dasd_generic_set_online(cdev
, &dasd_eckd_discipline
);
149 static const int sizes_trk0
[] = { 28, 148, 84 };
150 #define LABEL_SIZE 140
152 /* head and record addresses of count_area read in analysis ccw */
153 static const int count_area_head
[] = { 0, 0, 0, 0, 2 };
154 static const int count_area_rec
[] = { 1, 2, 3, 4, 1 };
156 static inline unsigned int
157 round_up_multiple(unsigned int no
, unsigned int mult
)
160 return (rem
? no
- rem
+ mult
: no
);
163 static inline unsigned int
164 ceil_quot(unsigned int d1
, unsigned int d2
)
166 return (d1
+ (d2
- 1)) / d2
;
170 recs_per_track(struct dasd_eckd_characteristics
* rdc
,
171 unsigned int kl
, unsigned int dl
)
175 switch (rdc
->dev_type
) {
178 return 1499 / (15 + 7 + ceil_quot(kl
+ 12, 32) +
179 ceil_quot(dl
+ 12, 32));
181 return 1499 / (15 + ceil_quot(dl
+ 12, 32));
183 dn
= ceil_quot(dl
+ 6, 232) + 1;
185 kn
= ceil_quot(kl
+ 6, 232) + 1;
186 return 1729 / (10 + 9 + ceil_quot(kl
+ 6 * kn
, 34) +
187 9 + ceil_quot(dl
+ 6 * dn
, 34));
189 return 1729 / (10 + 9 + ceil_quot(dl
+ 6 * dn
, 34));
191 dn
= ceil_quot(dl
+ 6, 232) + 1;
193 kn
= ceil_quot(kl
+ 6, 232) + 1;
194 return 1420 / (18 + 7 + ceil_quot(kl
+ 6 * kn
, 34) +
195 ceil_quot(dl
+ 6 * dn
, 34));
197 return 1420 / (18 + 7 + ceil_quot(dl
+ 6 * dn
, 34));
202 static void set_ch_t(struct ch_t
*geo
, __u32 cyl
, __u8 head
)
204 geo
->cyl
= (__u16
) cyl
;
205 geo
->head
= cyl
>> 16;
211 check_XRC (struct ccw1
*de_ccw
,
212 struct DE_eckd_data
*data
,
213 struct dasd_device
*device
)
215 struct dasd_eckd_private
*private = device
->private;
218 if (!private->rdc_data
.facilities
.XRC_supported
)
221 /* switch on System Time Stamp - needed for XRC Support */
222 data
->ga_extended
|= 0x08; /* switch on 'Time Stamp Valid' */
223 data
->ga_extended
|= 0x02; /* switch on 'Extended Parameter' */
225 rc
= get_sync_clock(&data
->ep_sys_time
);
226 /* Ignore return code if sync clock is switched off. */
227 if (rc
== -EOPNOTSUPP
|| rc
== -EACCES
)
230 de_ccw
->count
= sizeof(struct DE_eckd_data
);
231 de_ccw
->flags
|= CCW_FLAG_SLI
;
236 define_extent(struct ccw1
*ccw
, struct DE_eckd_data
*data
, unsigned int trk
,
237 unsigned int totrk
, int cmd
, struct dasd_device
*device
)
239 struct dasd_eckd_private
*private = device
->private;
241 u16 heads
, beghead
, endhead
;
244 ccw
->cmd_code
= DASD_ECKD_CCW_DEFINE_EXTENT
;
247 ccw
->cda
= (__u32
) __pa(data
);
249 memset(data
, 0, sizeof(struct DE_eckd_data
));
251 case DASD_ECKD_CCW_READ_HOME_ADDRESS
:
252 case DASD_ECKD_CCW_READ_RECORD_ZERO
:
253 case DASD_ECKD_CCW_READ
:
254 case DASD_ECKD_CCW_READ_MT
:
255 case DASD_ECKD_CCW_READ_CKD
:
256 case DASD_ECKD_CCW_READ_CKD_MT
:
257 case DASD_ECKD_CCW_READ_KD
:
258 case DASD_ECKD_CCW_READ_KD_MT
:
259 case DASD_ECKD_CCW_READ_COUNT
:
260 data
->mask
.perm
= 0x1;
261 data
->attributes
.operation
= private->attrib
.operation
;
263 case DASD_ECKD_CCW_WRITE
:
264 case DASD_ECKD_CCW_WRITE_MT
:
265 case DASD_ECKD_CCW_WRITE_KD
:
266 case DASD_ECKD_CCW_WRITE_KD_MT
:
267 data
->mask
.perm
= 0x02;
268 data
->attributes
.operation
= private->attrib
.operation
;
269 rc
= check_XRC (ccw
, data
, device
);
271 case DASD_ECKD_CCW_WRITE_CKD
:
272 case DASD_ECKD_CCW_WRITE_CKD_MT
:
273 data
->attributes
.operation
= DASD_BYPASS_CACHE
;
274 rc
= check_XRC (ccw
, data
, device
);
276 case DASD_ECKD_CCW_ERASE
:
277 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS
:
278 case DASD_ECKD_CCW_WRITE_RECORD_ZERO
:
279 data
->mask
.perm
= 0x3;
280 data
->mask
.auth
= 0x1;
281 data
->attributes
.operation
= DASD_BYPASS_CACHE
;
282 rc
= check_XRC (ccw
, data
, device
);
285 dev_err(&device
->cdev
->dev
,
286 "0x%x is not a known command\n", cmd
);
290 data
->attributes
.mode
= 0x3; /* ECKD */
292 if ((private->rdc_data
.cu_type
== 0x2105 ||
293 private->rdc_data
.cu_type
== 0x2107 ||
294 private->rdc_data
.cu_type
== 0x1750)
295 && !(private->uses_cdl
&& trk
< 2))
296 data
->ga_extended
|= 0x40; /* Regular Data Format Mode */
298 heads
= private->rdc_data
.trk_per_cyl
;
299 begcyl
= trk
/ heads
;
300 beghead
= trk
% heads
;
301 endcyl
= totrk
/ heads
;
302 endhead
= totrk
% heads
;
304 /* check for sequential prestage - enhance cylinder range */
305 if (data
->attributes
.operation
== DASD_SEQ_PRESTAGE
||
306 data
->attributes
.operation
== DASD_SEQ_ACCESS
) {
308 if (endcyl
+ private->attrib
.nr_cyl
< private->real_cyl
)
309 endcyl
+= private->attrib
.nr_cyl
;
311 endcyl
= (private->real_cyl
- 1);
314 set_ch_t(&data
->beg_ext
, begcyl
, beghead
);
315 set_ch_t(&data
->end_ext
, endcyl
, endhead
);
319 static int check_XRC_on_prefix(struct PFX_eckd_data
*pfxdata
,
320 struct dasd_device
*device
)
322 struct dasd_eckd_private
*private = device
->private;
325 if (!private->rdc_data
.facilities
.XRC_supported
)
328 /* switch on System Time Stamp - needed for XRC Support */
329 pfxdata
->define_extent
.ga_extended
|= 0x08; /* 'Time Stamp Valid' */
330 pfxdata
->define_extent
.ga_extended
|= 0x02; /* 'Extended Parameter' */
331 pfxdata
->validity
.time_stamp
= 1; /* 'Time Stamp Valid' */
333 rc
= get_sync_clock(&pfxdata
->define_extent
.ep_sys_time
);
334 /* Ignore return code if sync clock is switched off. */
335 if (rc
== -EOPNOTSUPP
|| rc
== -EACCES
)
340 static void fill_LRE_data(struct LRE_eckd_data
*data
, unsigned int trk
,
341 unsigned int rec_on_trk
, int count
, int cmd
,
342 struct dasd_device
*device
, unsigned int reclen
,
345 struct dasd_eckd_private
*private = device
->private;
349 memset(data
, 0, sizeof(*data
));
352 switch (private->rdc_data
.dev_type
) {
354 dn
= ceil_quot(reclen
+ 6, 232);
355 d
= 9 + ceil_quot(reclen
+ 6 * (dn
+ 1), 34);
356 sector
= (49 + (rec_on_trk
- 1) * (10 + d
)) / 8;
359 d
= 7 + ceil_quot(reclen
+ 12, 32);
360 sector
= (39 + (rec_on_trk
- 1) * (8 + d
)) / 7;
364 data
->sector
= sector
;
365 /* note: meaning of count depends on the operation
366 * for record based I/O it's the number of records, but for
367 * track based I/O it's the number of tracks
371 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS
:
372 data
->operation
.orientation
= 0x3;
373 data
->operation
.operation
= 0x03;
375 case DASD_ECKD_CCW_READ_HOME_ADDRESS
:
376 data
->operation
.orientation
= 0x3;
377 data
->operation
.operation
= 0x16;
379 case DASD_ECKD_CCW_WRITE_RECORD_ZERO
:
380 data
->operation
.orientation
= 0x1;
381 data
->operation
.operation
= 0x03;
384 case DASD_ECKD_CCW_READ_RECORD_ZERO
:
385 data
->operation
.orientation
= 0x3;
386 data
->operation
.operation
= 0x16;
389 case DASD_ECKD_CCW_WRITE
:
390 case DASD_ECKD_CCW_WRITE_MT
:
391 case DASD_ECKD_CCW_WRITE_KD
:
392 case DASD_ECKD_CCW_WRITE_KD_MT
:
393 data
->auxiliary
.length_valid
= 0x1;
394 data
->length
= reclen
;
395 data
->operation
.operation
= 0x01;
397 case DASD_ECKD_CCW_WRITE_CKD
:
398 case DASD_ECKD_CCW_WRITE_CKD_MT
:
399 data
->auxiliary
.length_valid
= 0x1;
400 data
->length
= reclen
;
401 data
->operation
.operation
= 0x03;
403 case DASD_ECKD_CCW_WRITE_FULL_TRACK
:
404 data
->operation
.orientation
= 0x0;
405 data
->operation
.operation
= 0x3F;
406 data
->extended_operation
= 0x11;
408 data
->extended_parameter_length
= 0x02;
409 if (data
->count
> 8) {
410 data
->extended_parameter
[0] = 0xFF;
411 data
->extended_parameter
[1] = 0xFF;
412 data
->extended_parameter
[1] <<= (16 - count
);
414 data
->extended_parameter
[0] = 0xFF;
415 data
->extended_parameter
[0] <<= (8 - count
);
416 data
->extended_parameter
[1] = 0x00;
420 case DASD_ECKD_CCW_WRITE_TRACK_DATA
:
421 data
->auxiliary
.length_valid
= 0x1;
422 data
->length
= reclen
; /* not tlf, as one might think */
423 data
->operation
.operation
= 0x3F;
424 data
->extended_operation
= 0x23;
426 case DASD_ECKD_CCW_READ
:
427 case DASD_ECKD_CCW_READ_MT
:
428 case DASD_ECKD_CCW_READ_KD
:
429 case DASD_ECKD_CCW_READ_KD_MT
:
430 data
->auxiliary
.length_valid
= 0x1;
431 data
->length
= reclen
;
432 data
->operation
.operation
= 0x06;
434 case DASD_ECKD_CCW_READ_CKD
:
435 case DASD_ECKD_CCW_READ_CKD_MT
:
436 data
->auxiliary
.length_valid
= 0x1;
437 data
->length
= reclen
;
438 data
->operation
.operation
= 0x16;
440 case DASD_ECKD_CCW_READ_COUNT
:
441 data
->operation
.operation
= 0x06;
443 case DASD_ECKD_CCW_READ_TRACK
:
444 data
->operation
.orientation
= 0x1;
445 data
->operation
.operation
= 0x0C;
446 data
->extended_parameter_length
= 0;
449 case DASD_ECKD_CCW_READ_TRACK_DATA
:
450 data
->auxiliary
.length_valid
= 0x1;
452 data
->operation
.operation
= 0x0C;
454 case DASD_ECKD_CCW_ERASE
:
455 data
->length
= reclen
;
456 data
->auxiliary
.length_valid
= 0x1;
457 data
->operation
.operation
= 0x0b;
460 DBF_DEV_EVENT(DBF_ERR
, device
,
461 "fill LRE unknown opcode 0x%x", cmd
);
464 set_ch_t(&data
->seek_addr
,
465 trk
/ private->rdc_data
.trk_per_cyl
,
466 trk
% private->rdc_data
.trk_per_cyl
);
467 data
->search_arg
.cyl
= data
->seek_addr
.cyl
;
468 data
->search_arg
.head
= data
->seek_addr
.head
;
469 data
->search_arg
.record
= rec_on_trk
;
472 static int prefix_LRE(struct ccw1
*ccw
, struct PFX_eckd_data
*pfxdata
,
473 unsigned int trk
, unsigned int totrk
, int cmd
,
474 struct dasd_device
*basedev
, struct dasd_device
*startdev
,
475 unsigned char format
, unsigned int rec_on_trk
, int count
,
476 unsigned int blksize
, unsigned int tlf
)
478 struct dasd_eckd_private
*basepriv
, *startpriv
;
479 struct DE_eckd_data
*dedata
;
480 struct LRE_eckd_data
*lredata
;
482 u16 heads
, beghead
, endhead
;
485 basepriv
= basedev
->private;
486 startpriv
= startdev
->private;
487 dedata
= &pfxdata
->define_extent
;
488 lredata
= &pfxdata
->locate_record
;
490 ccw
->cmd_code
= DASD_ECKD_CCW_PFX
;
492 if (cmd
== DASD_ECKD_CCW_WRITE_FULL_TRACK
) {
493 ccw
->count
= sizeof(*pfxdata
) + 2;
494 ccw
->cda
= (__u32
) __pa(pfxdata
);
495 memset(pfxdata
, 0, sizeof(*pfxdata
) + 2);
497 ccw
->count
= sizeof(*pfxdata
);
498 ccw
->cda
= (__u32
) __pa(pfxdata
);
499 memset(pfxdata
, 0, sizeof(*pfxdata
));
504 DBF_DEV_EVENT(DBF_ERR
, basedev
,
505 "PFX LRE unknown format 0x%x", format
);
509 pfxdata
->format
= format
;
510 pfxdata
->base_address
= basepriv
->ned
->unit_addr
;
511 pfxdata
->base_lss
= basepriv
->ned
->ID
;
512 pfxdata
->validity
.define_extent
= 1;
514 /* private uid is kept up to date, conf_data may be outdated */
515 if (startpriv
->uid
.type
!= UA_BASE_DEVICE
) {
516 pfxdata
->validity
.verify_base
= 1;
517 if (startpriv
->uid
.type
== UA_HYPER_PAV_ALIAS
)
518 pfxdata
->validity
.hyper_pav
= 1;
521 /* define extend data (mostly)*/
523 case DASD_ECKD_CCW_READ_HOME_ADDRESS
:
524 case DASD_ECKD_CCW_READ_RECORD_ZERO
:
525 case DASD_ECKD_CCW_READ
:
526 case DASD_ECKD_CCW_READ_MT
:
527 case DASD_ECKD_CCW_READ_CKD
:
528 case DASD_ECKD_CCW_READ_CKD_MT
:
529 case DASD_ECKD_CCW_READ_KD
:
530 case DASD_ECKD_CCW_READ_KD_MT
:
531 case DASD_ECKD_CCW_READ_COUNT
:
532 dedata
->mask
.perm
= 0x1;
533 dedata
->attributes
.operation
= basepriv
->attrib
.operation
;
535 case DASD_ECKD_CCW_READ_TRACK
:
536 case DASD_ECKD_CCW_READ_TRACK_DATA
:
537 dedata
->mask
.perm
= 0x1;
538 dedata
->attributes
.operation
= basepriv
->attrib
.operation
;
539 dedata
->blk_size
= 0;
541 case DASD_ECKD_CCW_WRITE
:
542 case DASD_ECKD_CCW_WRITE_MT
:
543 case DASD_ECKD_CCW_WRITE_KD
:
544 case DASD_ECKD_CCW_WRITE_KD_MT
:
545 dedata
->mask
.perm
= 0x02;
546 dedata
->attributes
.operation
= basepriv
->attrib
.operation
;
547 rc
= check_XRC_on_prefix(pfxdata
, basedev
);
549 case DASD_ECKD_CCW_WRITE_CKD
:
550 case DASD_ECKD_CCW_WRITE_CKD_MT
:
551 dedata
->attributes
.operation
= DASD_BYPASS_CACHE
;
552 rc
= check_XRC_on_prefix(pfxdata
, basedev
);
554 case DASD_ECKD_CCW_ERASE
:
555 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS
:
556 case DASD_ECKD_CCW_WRITE_RECORD_ZERO
:
557 dedata
->mask
.perm
= 0x3;
558 dedata
->mask
.auth
= 0x1;
559 dedata
->attributes
.operation
= DASD_BYPASS_CACHE
;
560 rc
= check_XRC_on_prefix(pfxdata
, basedev
);
562 case DASD_ECKD_CCW_WRITE_FULL_TRACK
:
563 dedata
->mask
.perm
= 0x03;
564 dedata
->attributes
.operation
= basepriv
->attrib
.operation
;
565 dedata
->blk_size
= 0;
567 case DASD_ECKD_CCW_WRITE_TRACK_DATA
:
568 dedata
->mask
.perm
= 0x02;
569 dedata
->attributes
.operation
= basepriv
->attrib
.operation
;
570 dedata
->blk_size
= blksize
;
571 rc
= check_XRC_on_prefix(pfxdata
, basedev
);
574 DBF_DEV_EVENT(DBF_ERR
, basedev
,
575 "PFX LRE unknown opcode 0x%x", cmd
);
580 dedata
->attributes
.mode
= 0x3; /* ECKD */
582 if ((basepriv
->rdc_data
.cu_type
== 0x2105 ||
583 basepriv
->rdc_data
.cu_type
== 0x2107 ||
584 basepriv
->rdc_data
.cu_type
== 0x1750)
585 && !(basepriv
->uses_cdl
&& trk
< 2))
586 dedata
->ga_extended
|= 0x40; /* Regular Data Format Mode */
588 heads
= basepriv
->rdc_data
.trk_per_cyl
;
589 begcyl
= trk
/ heads
;
590 beghead
= trk
% heads
;
591 endcyl
= totrk
/ heads
;
592 endhead
= totrk
% heads
;
594 /* check for sequential prestage - enhance cylinder range */
595 if (dedata
->attributes
.operation
== DASD_SEQ_PRESTAGE
||
596 dedata
->attributes
.operation
== DASD_SEQ_ACCESS
) {
598 if (endcyl
+ basepriv
->attrib
.nr_cyl
< basepriv
->real_cyl
)
599 endcyl
+= basepriv
->attrib
.nr_cyl
;
601 endcyl
= (basepriv
->real_cyl
- 1);
604 set_ch_t(&dedata
->beg_ext
, begcyl
, beghead
);
605 set_ch_t(&dedata
->end_ext
, endcyl
, endhead
);
608 fill_LRE_data(lredata
, trk
, rec_on_trk
, count
, cmd
,
609 basedev
, blksize
, tlf
);
615 static int prefix(struct ccw1
*ccw
, struct PFX_eckd_data
*pfxdata
,
616 unsigned int trk
, unsigned int totrk
, int cmd
,
617 struct dasd_device
*basedev
, struct dasd_device
*startdev
)
619 return prefix_LRE(ccw
, pfxdata
, trk
, totrk
, cmd
, basedev
, startdev
,
624 locate_record(struct ccw1
*ccw
, struct LO_eckd_data
*data
, unsigned int trk
,
625 unsigned int rec_on_trk
, int no_rec
, int cmd
,
626 struct dasd_device
* device
, int reclen
)
628 struct dasd_eckd_private
*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 = device
->private;
800 if (!private->ned
|| !private->gneq
)
802 spin_lock_irqsave(get_ccwdev_lock(device
->cdev
), flags
);
804 spin_unlock_irqrestore(get_ccwdev_lock(device
->cdev
), flags
);
808 static int dasd_eckd_get_uid(struct dasd_device
*device
, struct dasd_uid
*uid
)
810 struct dasd_eckd_private
*private = device
->private;
814 spin_lock_irqsave(get_ccwdev_lock(device
->cdev
), flags
);
816 spin_unlock_irqrestore(get_ccwdev_lock(device
->cdev
), flags
);
823 * compare device UID with data of a given dasd_eckd_private structure
826 static int dasd_eckd_compare_path_uid(struct dasd_device
*device
,
827 struct dasd_eckd_private
*private)
829 struct dasd_uid device_uid
;
832 dasd_eckd_get_uid(device
, &device_uid
);
834 return memcmp(&device_uid
, &private->uid
, sizeof(struct dasd_uid
));
837 static void dasd_eckd_fill_rcd_cqr(struct dasd_device
*device
,
838 struct dasd_ccw_req
*cqr
,
844 * buffer has to start with EBCDIC "V1.0" to show
845 * support for virtual device SNEQ
847 rcd_buffer
[0] = 0xE5;
848 rcd_buffer
[1] = 0xF1;
849 rcd_buffer
[2] = 0x4B;
850 rcd_buffer
[3] = 0xF0;
853 ccw
->cmd_code
= DASD_ECKD_CCW_RCD
;
855 ccw
->cda
= (__u32
)(addr_t
)rcd_buffer
;
856 ccw
->count
= DASD_ECKD_RCD_DATA_SIZE
;
857 cqr
->magic
= DASD_ECKD_MAGIC
;
859 cqr
->startdev
= device
;
860 cqr
->memdev
= device
;
862 cqr
->expires
= 10*HZ
;
865 cqr
->buildclk
= get_tod_clock();
866 cqr
->status
= DASD_CQR_FILLED
;
867 set_bit(DASD_CQR_VERIFY_PATH
, &cqr
->flags
);
871 * Wakeup helper for read_conf
872 * if the cqr is not done and needs some error recovery
873 * the buffer has to be re-initialized with the EBCDIC "V1.0"
874 * to show support for virtual device SNEQ
876 static void read_conf_cb(struct dasd_ccw_req
*cqr
, void *data
)
881 if (cqr
->status
!= DASD_CQR_DONE
) {
883 rcd_buffer
= (__u8
*)((addr_t
) ccw
->cda
);
884 memset(rcd_buffer
, 0, sizeof(*rcd_buffer
));
886 rcd_buffer
[0] = 0xE5;
887 rcd_buffer
[1] = 0xF1;
888 rcd_buffer
[2] = 0x4B;
889 rcd_buffer
[3] = 0xF0;
891 dasd_wakeup_cb(cqr
, data
);
894 static int dasd_eckd_read_conf_immediately(struct dasd_device
*device
,
895 struct dasd_ccw_req
*cqr
,
902 * sanity check: scan for RCD command in extended SenseID data
903 * some devices do not support RCD
905 ciw
= ccw_device_get_ciw(device
->cdev
, CIW_TYPE_RCD
);
906 if (!ciw
|| ciw
->cmd
!= DASD_ECKD_CCW_RCD
)
909 dasd_eckd_fill_rcd_cqr(device
, cqr
, rcd_buffer
, lpm
);
910 clear_bit(DASD_CQR_FLAGS_USE_ERP
, &cqr
->flags
);
911 set_bit(DASD_CQR_ALLOW_SLOCK
, &cqr
->flags
);
913 cqr
->callback
= read_conf_cb
;
914 rc
= dasd_sleep_on_immediatly(cqr
);
918 static int dasd_eckd_read_conf_lpm(struct dasd_device
*device
,
920 int *rcd_buffer_size
, __u8 lpm
)
923 char *rcd_buf
= NULL
;
925 struct dasd_ccw_req
*cqr
;
928 * sanity check: scan for RCD command in extended SenseID data
929 * some devices do not support RCD
931 ciw
= ccw_device_get_ciw(device
->cdev
, CIW_TYPE_RCD
);
932 if (!ciw
|| ciw
->cmd
!= DASD_ECKD_CCW_RCD
) {
936 rcd_buf
= kzalloc(DASD_ECKD_RCD_DATA_SIZE
, GFP_KERNEL
| GFP_DMA
);
941 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1 /* RCD */,
942 0, /* use rcd_buf as data ara */
945 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
946 "Could not allocate RCD request");
950 dasd_eckd_fill_rcd_cqr(device
, cqr
, rcd_buf
, lpm
);
951 cqr
->callback
= read_conf_cb
;
952 ret
= dasd_sleep_on(cqr
);
954 * on success we update the user input parms
956 dasd_sfree_request(cqr
, cqr
->memdev
);
960 *rcd_buffer_size
= DASD_ECKD_RCD_DATA_SIZE
;
961 *rcd_buffer
= rcd_buf
;
966 *rcd_buffer_size
= 0;
970 static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private
*private)
973 struct dasd_sneq
*sneq
;
977 private->sneq
= NULL
;
978 private->vdsneq
= NULL
;
979 private->gneq
= NULL
;
980 count
= private->conf_len
/ sizeof(struct dasd_sneq
);
981 sneq
= (struct dasd_sneq
*)private->conf_data
;
982 for (i
= 0; i
< count
; ++i
) {
983 if (sneq
->flags
.identifier
== 1 && sneq
->format
== 1)
984 private->sneq
= sneq
;
985 else if (sneq
->flags
.identifier
== 1 && sneq
->format
== 4)
986 private->vdsneq
= (struct vd_sneq
*)sneq
;
987 else if (sneq
->flags
.identifier
== 2)
988 private->gneq
= (struct dasd_gneq
*)sneq
;
989 else if (sneq
->flags
.identifier
== 3 && sneq
->res1
== 1)
990 private->ned
= (struct dasd_ned
*)sneq
;
993 if (!private->ned
|| !private->gneq
) {
995 private->sneq
= NULL
;
996 private->vdsneq
= NULL
;
997 private->gneq
= NULL
;
1004 static unsigned char dasd_eckd_path_access(void *conf_data
, int conf_len
)
1006 struct dasd_gneq
*gneq
;
1007 int i
, count
, found
;
1009 count
= conf_len
/ sizeof(*gneq
);
1010 gneq
= (struct dasd_gneq
*)conf_data
;
1012 for (i
= 0; i
< count
; ++i
) {
1013 if (gneq
->flags
.identifier
== 2) {
1020 return ((char *)gneq
)[18] & 0x07;
1025 static void dasd_eckd_clear_conf_data(struct dasd_device
*device
)
1027 struct dasd_eckd_private
*private = device
->private;
1030 private->conf_data
= NULL
;
1031 private->conf_len
= 0;
1032 for (i
= 0; i
< 8; i
++) {
1033 kfree(private->path_conf_data
[i
]);
1034 private->path_conf_data
[i
] = NULL
;
1039 static int dasd_eckd_read_conf(struct dasd_device
*device
)
1042 int conf_len
, conf_data_saved
;
1043 int rc
, path_err
, pos
;
1045 struct dasd_eckd_private
*private, path_private
;
1046 struct dasd_path
*path_data
;
1047 struct dasd_uid
*uid
;
1048 char print_path_uid
[60], print_device_uid
[60];
1050 private = device
->private;
1051 path_data
= &device
->path_data
;
1052 opm
= ccw_device_get_path_mask(device
->cdev
);
1053 conf_data_saved
= 0;
1055 /* get configuration data per operational path */
1056 for (lpm
= 0x80; lpm
; lpm
>>= 1) {
1059 rc
= dasd_eckd_read_conf_lpm(device
, &conf_data
,
1061 if (rc
&& rc
!= -EOPNOTSUPP
) { /* -EOPNOTSUPP is ok */
1062 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
,
1063 "Read configuration data returned "
1067 if (conf_data
== NULL
) {
1068 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
, "%s",
1069 "No configuration data "
1071 /* no further analysis possible */
1072 path_data
->opm
|= lpm
;
1073 continue; /* no error */
1075 /* save first valid configuration data */
1076 if (!conf_data_saved
) {
1077 /* initially clear previously stored conf_data */
1078 dasd_eckd_clear_conf_data(device
);
1079 private->conf_data
= conf_data
;
1080 private->conf_len
= conf_len
;
1081 if (dasd_eckd_identify_conf_parts(private)) {
1082 private->conf_data
= NULL
;
1083 private->conf_len
= 0;
1087 pos
= pathmask_to_pos(lpm
);
1088 /* store per path conf_data */
1089 private->path_conf_data
[pos
] =
1090 (struct dasd_conf_data
*) conf_data
;
1092 * build device UID that other path data
1093 * can be compared to it
1095 dasd_eckd_generate_uid(device
);
1098 path_private
.conf_data
= conf_data
;
1099 path_private
.conf_len
= DASD_ECKD_RCD_DATA_SIZE
;
1100 if (dasd_eckd_identify_conf_parts(
1102 path_private
.conf_data
= NULL
;
1103 path_private
.conf_len
= 0;
1107 if (dasd_eckd_compare_path_uid(
1108 device
, &path_private
)) {
1109 uid
= &path_private
.uid
;
1110 if (strlen(uid
->vduit
) > 0)
1111 snprintf(print_path_uid
,
1112 sizeof(print_path_uid
),
1113 "%s.%s.%04x.%02x.%s",
1114 uid
->vendor
, uid
->serial
,
1115 uid
->ssid
, uid
->real_unit_addr
,
1118 snprintf(print_path_uid
,
1119 sizeof(print_path_uid
),
1121 uid
->vendor
, uid
->serial
,
1123 uid
->real_unit_addr
);
1124 uid
= &private->uid
;
1125 if (strlen(uid
->vduit
) > 0)
1126 snprintf(print_device_uid
,
1127 sizeof(print_device_uid
),
1128 "%s.%s.%04x.%02x.%s",
1129 uid
->vendor
, uid
->serial
,
1130 uid
->ssid
, uid
->real_unit_addr
,
1133 snprintf(print_device_uid
,
1134 sizeof(print_device_uid
),
1136 uid
->vendor
, uid
->serial
,
1138 uid
->real_unit_addr
);
1139 dev_err(&device
->cdev
->dev
,
1140 "Not all channel paths lead to "
1141 "the same device, path %02X leads to "
1142 "device %s instead of %s\n", lpm
,
1143 print_path_uid
, print_device_uid
);
1145 path_data
->cablepm
|= lpm
;
1148 pos
= pathmask_to_pos(lpm
);
1149 /* store per path conf_data */
1150 private->path_conf_data
[pos
] =
1151 (struct dasd_conf_data
*) conf_data
;
1152 path_private
.conf_data
= NULL
;
1153 path_private
.conf_len
= 0;
1155 switch (dasd_eckd_path_access(conf_data
, conf_len
)) {
1157 path_data
->npm
|= lpm
;
1160 path_data
->ppm
|= lpm
;
1163 if (!path_data
->opm
) {
1164 path_data
->opm
= lpm
;
1165 dasd_generic_path_operational(device
);
1167 path_data
->opm
|= lpm
;
1170 * if the path is used
1171 * it should not be in one of the negative lists
1173 path_data
->cablepm
&= ~lpm
;
1174 path_data
->hpfpm
&= ~lpm
;
1175 path_data
->cuirpm
&= ~lpm
;
1181 static int verify_fcx_max_data(struct dasd_device
*device
, __u8 lpm
)
1183 struct dasd_eckd_private
*private = device
->private;
1187 if (private->fcx_max_data
) {
1188 mdc
= ccw_device_get_mdc(device
->cdev
, lpm
);
1190 dev_warn(&device
->cdev
->dev
,
1191 "Detecting the maximum data size for zHPF "
1192 "requests failed (rc=%d) for a new path %x\n",
1196 fcx_max_data
= mdc
* FCX_MAX_DATA_FACTOR
;
1197 if (fcx_max_data
< private->fcx_max_data
) {
1198 dev_warn(&device
->cdev
->dev
,
1199 "The maximum data size for zHPF requests %u "
1200 "on a new path %x is below the active maximum "
1201 "%u\n", fcx_max_data
, lpm
,
1202 private->fcx_max_data
);
1209 static int rebuild_device_uid(struct dasd_device
*device
,
1210 struct path_verification_work_data
*data
)
1212 struct dasd_eckd_private
*private = device
->private;
1213 struct dasd_path
*path_data
= &device
->path_data
;
1214 __u8 lpm
, opm
= path_data
->opm
;
1217 for (lpm
= 0x80; lpm
; lpm
>>= 1) {
1220 memset(&data
->rcd_buffer
, 0, sizeof(data
->rcd_buffer
));
1221 memset(&data
->cqr
, 0, sizeof(data
->cqr
));
1222 data
->cqr
.cpaddr
= &data
->ccw
;
1223 rc
= dasd_eckd_read_conf_immediately(device
, &data
->cqr
,
1228 if (rc
== -EOPNOTSUPP
) /* -EOPNOTSUPP is ok */
1230 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
,
1231 "Read configuration data "
1232 "returned error %d", rc
);
1235 memcpy(private->conf_data
, data
->rcd_buffer
,
1236 DASD_ECKD_RCD_DATA_SIZE
);
1237 if (dasd_eckd_identify_conf_parts(private)) {
1239 } else /* first valid path is enough */
1244 rc
= dasd_eckd_generate_uid(device
);
1249 static void do_path_verification_work(struct work_struct
*work
)
1251 struct path_verification_work_data
*data
;
1252 struct dasd_device
*device
;
1253 struct dasd_eckd_private path_private
;
1254 struct dasd_uid
*uid
;
1255 __u8 path_rcd_buf
[DASD_ECKD_RCD_DATA_SIZE
];
1256 __u8 lpm
, opm
, npm
, ppm
, epm
, hpfpm
, cablepm
;
1257 unsigned long flags
;
1261 data
= container_of(work
, struct path_verification_work_data
, worker
);
1262 device
= data
->device
;
1264 /* delay path verification until device was resumed */
1265 if (test_bit(DASD_FLAG_SUSPENDED
, &device
->flags
)) {
1266 schedule_work(work
);
1269 /* check if path verification already running and delay if so */
1270 if (test_and_set_bit(DASD_FLAG_PATH_VERIFY
, &device
->flags
)) {
1271 schedule_work(work
);
1281 for (lpm
= 0x80; lpm
; lpm
>>= 1) {
1282 if (!(lpm
& data
->tbvpm
))
1284 memset(&data
->rcd_buffer
, 0, sizeof(data
->rcd_buffer
));
1285 memset(&data
->cqr
, 0, sizeof(data
->cqr
));
1286 data
->cqr
.cpaddr
= &data
->ccw
;
1287 rc
= dasd_eckd_read_conf_immediately(device
, &data
->cqr
,
1291 switch (dasd_eckd_path_access(data
->rcd_buffer
,
1292 DASD_ECKD_RCD_DATA_SIZE
)
1302 } else if (rc
== -EOPNOTSUPP
) {
1303 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
, "%s",
1304 "path verification: No configuration "
1307 } else if (rc
== -EAGAIN
) {
1308 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
, "%s",
1309 "path verification: device is stopped,"
1310 " try again later");
1313 dev_warn(&device
->cdev
->dev
,
1314 "Reading device feature codes failed "
1315 "(rc=%d) for new path %x\n", rc
, lpm
);
1318 if (verify_fcx_max_data(device
, lpm
)) {
1327 * save conf_data for comparison after
1328 * rebuild_device_uid may have changed
1331 memcpy(&path_rcd_buf
, data
->rcd_buffer
,
1332 DASD_ECKD_RCD_DATA_SIZE
);
1333 path_private
.conf_data
= (void *) &path_rcd_buf
;
1334 path_private
.conf_len
= DASD_ECKD_RCD_DATA_SIZE
;
1335 if (dasd_eckd_identify_conf_parts(&path_private
)) {
1336 path_private
.conf_data
= NULL
;
1337 path_private
.conf_len
= 0;
1342 * compare path UID with device UID only if at least
1343 * one valid path is left
1344 * in other case the device UID may have changed and
1345 * the first working path UID will be used as device UID
1347 if (device
->path_data
.opm
&&
1348 dasd_eckd_compare_path_uid(device
, &path_private
)) {
1350 * the comparison was not successful
1351 * rebuild the device UID with at least one
1352 * known path in case a z/VM hyperswap command
1353 * has changed the device
1355 * after this compare again
1357 * if either the rebuild or the recompare fails
1358 * the path can not be used
1360 if (rebuild_device_uid(device
, data
) ||
1361 dasd_eckd_compare_path_uid(
1362 device
, &path_private
)) {
1363 uid
= &path_private
.uid
;
1364 if (strlen(uid
->vduit
) > 0)
1365 snprintf(print_uid
, sizeof(print_uid
),
1366 "%s.%s.%04x.%02x.%s",
1367 uid
->vendor
, uid
->serial
,
1368 uid
->ssid
, uid
->real_unit_addr
,
1371 snprintf(print_uid
, sizeof(print_uid
),
1373 uid
->vendor
, uid
->serial
,
1375 uid
->real_unit_addr
);
1376 dev_err(&device
->cdev
->dev
,
1377 "The newly added channel path %02X "
1378 "will not be used because it leads "
1379 "to a different device %s\n",
1390 * There is a small chance that a path is lost again between
1391 * above path verification and the following modification of
1392 * the device opm mask. We could avoid that race here by using
1393 * yet another path mask, but we rather deal with this unlikely
1394 * situation in dasd_start_IO.
1396 spin_lock_irqsave(get_ccwdev_lock(device
->cdev
), flags
);
1397 if (!device
->path_data
.opm
&& opm
) {
1398 device
->path_data
.opm
= opm
;
1399 device
->path_data
.cablepm
&= ~opm
;
1400 device
->path_data
.cuirpm
&= ~opm
;
1401 device
->path_data
.hpfpm
&= ~opm
;
1402 dasd_generic_path_operational(device
);
1404 device
->path_data
.opm
|= opm
;
1405 device
->path_data
.cablepm
&= ~opm
;
1406 device
->path_data
.cuirpm
&= ~opm
;
1407 device
->path_data
.hpfpm
&= ~opm
;
1409 device
->path_data
.npm
|= npm
;
1410 device
->path_data
.ppm
|= ppm
;
1411 device
->path_data
.tbvpm
|= epm
;
1412 device
->path_data
.cablepm
|= cablepm
;
1413 device
->path_data
.hpfpm
|= hpfpm
;
1414 spin_unlock_irqrestore(get_ccwdev_lock(device
->cdev
), flags
);
1416 clear_bit(DASD_FLAG_PATH_VERIFY
, &device
->flags
);
1417 dasd_put_device(device
);
1419 mutex_unlock(&dasd_path_verification_mutex
);
1424 static int dasd_eckd_verify_path(struct dasd_device
*device
, __u8 lpm
)
1426 struct path_verification_work_data
*data
;
1428 data
= kmalloc(sizeof(*data
), GFP_ATOMIC
| GFP_DMA
);
1430 if (mutex_trylock(&dasd_path_verification_mutex
)) {
1431 data
= path_verification_worker
;
1436 memset(data
, 0, sizeof(*data
));
1439 INIT_WORK(&data
->worker
, do_path_verification_work
);
1440 dasd_get_device(device
);
1441 data
->device
= device
;
1443 schedule_work(&data
->worker
);
1447 static int dasd_eckd_read_features(struct dasd_device
*device
)
1449 struct dasd_eckd_private
*private = device
->private;
1450 struct dasd_psf_prssd_data
*prssdp
;
1451 struct dasd_rssd_features
*features
;
1452 struct dasd_ccw_req
*cqr
;
1456 memset(&private->features
, 0, sizeof(struct dasd_rssd_features
));
1457 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1 /* PSF */ + 1 /* RSSD */,
1458 (sizeof(struct dasd_psf_prssd_data
) +
1459 sizeof(struct dasd_rssd_features
)),
1462 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
, "%s", "Could not "
1463 "allocate initialization request");
1464 return PTR_ERR(cqr
);
1466 cqr
->startdev
= device
;
1467 cqr
->memdev
= device
;
1470 cqr
->expires
= 10 * HZ
;
1472 /* Prepare for Read Subsystem Data */
1473 prssdp
= (struct dasd_psf_prssd_data
*) cqr
->data
;
1474 memset(prssdp
, 0, sizeof(struct dasd_psf_prssd_data
));
1475 prssdp
->order
= PSF_ORDER_PRSSD
;
1476 prssdp
->suborder
= 0x41; /* Read Feature Codes */
1477 /* all other bytes of prssdp must be zero */
1480 ccw
->cmd_code
= DASD_ECKD_CCW_PSF
;
1481 ccw
->count
= sizeof(struct dasd_psf_prssd_data
);
1482 ccw
->flags
|= CCW_FLAG_CC
;
1483 ccw
->cda
= (__u32
)(addr_t
) prssdp
;
1485 /* Read Subsystem Data - feature codes */
1486 features
= (struct dasd_rssd_features
*) (prssdp
+ 1);
1487 memset(features
, 0, sizeof(struct dasd_rssd_features
));
1490 ccw
->cmd_code
= DASD_ECKD_CCW_RSSD
;
1491 ccw
->count
= sizeof(struct dasd_rssd_features
);
1492 ccw
->cda
= (__u32
)(addr_t
) features
;
1494 cqr
->buildclk
= get_tod_clock();
1495 cqr
->status
= DASD_CQR_FILLED
;
1496 rc
= dasd_sleep_on(cqr
);
1498 prssdp
= (struct dasd_psf_prssd_data
*) cqr
->data
;
1499 features
= (struct dasd_rssd_features
*) (prssdp
+ 1);
1500 memcpy(&private->features
, features
,
1501 sizeof(struct dasd_rssd_features
));
1503 dev_warn(&device
->cdev
->dev
, "Reading device feature codes"
1504 " failed with rc=%d\n", rc
);
1505 dasd_sfree_request(cqr
, cqr
->memdev
);
1511 * Build CP for Perform Subsystem Function - SSC.
1513 static struct dasd_ccw_req
*dasd_eckd_build_psf_ssc(struct dasd_device
*device
,
1516 struct dasd_ccw_req
*cqr
;
1517 struct dasd_psf_ssc_data
*psf_ssc_data
;
1520 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1 /* PSF */ ,
1521 sizeof(struct dasd_psf_ssc_data
),
1525 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
1526 "Could not allocate PSF-SSC request");
1529 psf_ssc_data
= (struct dasd_psf_ssc_data
*)cqr
->data
;
1530 psf_ssc_data
->order
= PSF_ORDER_SSC
;
1531 psf_ssc_data
->suborder
= 0xc0;
1533 psf_ssc_data
->suborder
|= 0x08;
1534 psf_ssc_data
->reserved
[0] = 0x88;
1537 ccw
->cmd_code
= DASD_ECKD_CCW_PSF
;
1538 ccw
->cda
= (__u32
)(addr_t
)psf_ssc_data
;
1541 cqr
->startdev
= device
;
1542 cqr
->memdev
= device
;
1545 cqr
->expires
= 10*HZ
;
1546 cqr
->buildclk
= get_tod_clock();
1547 cqr
->status
= DASD_CQR_FILLED
;
1552 * Perform Subsystem Function.
1553 * It is necessary to trigger CIO for channel revalidation since this
1554 * call might change behaviour of DASD devices.
1557 dasd_eckd_psf_ssc(struct dasd_device
*device
, int enable_pav
,
1558 unsigned long flags
)
1560 struct dasd_ccw_req
*cqr
;
1563 cqr
= dasd_eckd_build_psf_ssc(device
, enable_pav
);
1565 return PTR_ERR(cqr
);
1568 * set flags e.g. turn on failfast, to prevent blocking
1569 * the calling function should handle failed requests
1571 cqr
->flags
|= flags
;
1573 rc
= dasd_sleep_on(cqr
);
1575 /* trigger CIO to reprobe devices */
1576 css_schedule_reprobe();
1577 else if (cqr
->intrc
== -EAGAIN
)
1580 dasd_sfree_request(cqr
, cqr
->memdev
);
1585 * Valide storage server of current device.
1587 static int dasd_eckd_validate_server(struct dasd_device
*device
,
1588 unsigned long flags
)
1590 struct dasd_eckd_private
*private = device
->private;
1593 if (private->uid
.type
== UA_BASE_PAV_ALIAS
||
1594 private->uid
.type
== UA_HYPER_PAV_ALIAS
)
1596 if (dasd_nopav
|| MACHINE_IS_VM
)
1600 rc
= dasd_eckd_psf_ssc(device
, enable_pav
, flags
);
1602 /* may be requested feature is not available on server,
1603 * therefore just report error and go ahead */
1604 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
, "PSF-SSC for SSID %04x "
1605 "returned rc=%d", private->uid
.ssid
, rc
);
1610 * worker to do a validate server in case of a lost pathgroup
1612 static void dasd_eckd_do_validate_server(struct work_struct
*work
)
1614 struct dasd_device
*device
= container_of(work
, struct dasd_device
,
1616 unsigned long flags
= 0;
1618 set_bit(DASD_CQR_FLAGS_FAILFAST
, &flags
);
1619 if (dasd_eckd_validate_server(device
, flags
)
1621 /* schedule worker again if failed */
1622 schedule_work(&device
->kick_validate
);
1626 dasd_put_device(device
);
1629 static void dasd_eckd_kick_validate_server(struct dasd_device
*device
)
1631 dasd_get_device(device
);
1632 /* exit if device not online or in offline processing */
1633 if (test_bit(DASD_FLAG_OFFLINE
, &device
->flags
) ||
1634 device
->state
< DASD_STATE_ONLINE
) {
1635 dasd_put_device(device
);
1638 /* queue call to do_validate_server to the kernel event daemon. */
1639 if (!schedule_work(&device
->kick_validate
))
1640 dasd_put_device(device
);
1643 static u32
get_fcx_max_data(struct dasd_device
*device
)
1645 struct dasd_eckd_private
*private = device
->private;
1646 int fcx_in_css
, fcx_in_gneq
, fcx_in_features
;
1651 /* is transport mode supported? */
1652 fcx_in_css
= css_general_characteristics
.fcx
;
1653 fcx_in_gneq
= private->gneq
->reserved2
[7] & 0x04;
1654 fcx_in_features
= private->features
.feature
[40] & 0x80;
1655 tpm
= fcx_in_css
&& fcx_in_gneq
&& fcx_in_features
;
1660 mdc
= ccw_device_get_mdc(device
->cdev
, 0);
1662 dev_warn(&device
->cdev
->dev
, "Detecting the maximum supported"
1663 " data size for zHPF requests failed\n");
1666 return mdc
* FCX_MAX_DATA_FACTOR
;
1670 * Check device characteristics.
1671 * If the device is accessible using ECKD discipline, the device is enabled.
1674 dasd_eckd_check_characteristics(struct dasd_device
*device
)
1676 struct dasd_eckd_private
*private = device
->private;
1677 struct dasd_block
*block
;
1678 struct dasd_uid temp_uid
;
1681 unsigned long value
;
1683 /* setup work queue for validate server*/
1684 INIT_WORK(&device
->kick_validate
, dasd_eckd_do_validate_server
);
1686 if (!ccw_device_is_pathgroup(device
->cdev
)) {
1687 dev_warn(&device
->cdev
->dev
,
1688 "A channel path group could not be established\n");
1691 if (!ccw_device_is_multipath(device
->cdev
)) {
1692 dev_info(&device
->cdev
->dev
,
1693 "The DASD is not operating in multipath mode\n");
1696 private = kzalloc(sizeof(*private), GFP_KERNEL
| GFP_DMA
);
1698 dev_warn(&device
->cdev
->dev
,
1699 "Allocating memory for private DASD data "
1703 device
->private = private;
1705 memset(private, 0, sizeof(*private));
1707 /* Invalidate status of initial analysis. */
1708 private->init_cqr_status
= -1;
1709 /* Set default cache operations. */
1710 private->attrib
.operation
= DASD_NORMAL_CACHE
;
1711 private->attrib
.nr_cyl
= 0;
1713 /* Read Configuration Data */
1714 rc
= dasd_eckd_read_conf(device
);
1718 /* set default timeout */
1719 device
->default_expires
= DASD_EXPIRES
;
1720 /* set default retry count */
1721 device
->default_retries
= DASD_RETRIES
;
1723 if (private->gneq
) {
1725 for (i
= 0; i
< private->gneq
->timeout
.value
; i
++)
1727 value
= value
* private->gneq
->timeout
.number
;
1728 /* do not accept useless values */
1729 if (value
!= 0 && value
<= DASD_EXPIRES_MAX
)
1730 device
->default_expires
= value
;
1733 dasd_eckd_get_uid(device
, &temp_uid
);
1734 if (temp_uid
.type
== UA_BASE_DEVICE
) {
1735 block
= dasd_alloc_block();
1736 if (IS_ERR(block
)) {
1737 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
, "%s",
1738 "could not allocate dasd "
1740 rc
= PTR_ERR(block
);
1743 device
->block
= block
;
1744 block
->base
= device
;
1747 /* register lcu with alias handling, enable PAV */
1748 rc
= dasd_alias_make_device_known_to_lcu(device
);
1752 dasd_eckd_validate_server(device
, 0);
1754 /* device may report different configuration data after LCU setup */
1755 rc
= dasd_eckd_read_conf(device
);
1759 /* Read Feature Codes */
1760 dasd_eckd_read_features(device
);
1762 /* Read Device Characteristics */
1763 rc
= dasd_generic_read_dev_chars(device
, DASD_ECKD_MAGIC
,
1764 &private->rdc_data
, 64);
1766 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
,
1767 "Read device characteristic failed, rc=%d", rc
);
1771 if ((device
->features
& DASD_FEATURE_USERAW
) &&
1772 !(private->rdc_data
.facilities
.RT_in_LR
)) {
1773 dev_err(&device
->cdev
->dev
, "The storage server does not "
1774 "support raw-track access\n");
1779 /* find the valid cylinder size */
1780 if (private->rdc_data
.no_cyl
== LV_COMPAT_CYL
&&
1781 private->rdc_data
.long_no_cyl
)
1782 private->real_cyl
= private->rdc_data
.long_no_cyl
;
1784 private->real_cyl
= private->rdc_data
.no_cyl
;
1786 private->fcx_max_data
= get_fcx_max_data(device
);
1788 readonly
= dasd_device_is_ro(device
);
1790 set_bit(DASD_FLAG_DEVICE_RO
, &device
->flags
);
1792 dev_info(&device
->cdev
->dev
, "New DASD %04X/%02X (CU %04X/%02X) "
1793 "with %d cylinders, %d heads, %d sectors%s\n",
1794 private->rdc_data
.dev_type
,
1795 private->rdc_data
.dev_model
,
1796 private->rdc_data
.cu_type
,
1797 private->rdc_data
.cu_model
.model
,
1799 private->rdc_data
.trk_per_cyl
,
1800 private->rdc_data
.sec_per_trk
,
1801 readonly
? ", read-only device" : "");
1805 dasd_alias_disconnect_device_from_lcu(device
);
1807 dasd_free_block(device
->block
);
1808 device
->block
= NULL
;
1810 kfree(private->conf_data
);
1811 kfree(device
->private);
1812 device
->private = NULL
;
1816 static void dasd_eckd_uncheck_device(struct dasd_device
*device
)
1818 struct dasd_eckd_private
*private = device
->private;
1821 dasd_alias_disconnect_device_from_lcu(device
);
1822 private->ned
= NULL
;
1823 private->sneq
= NULL
;
1824 private->vdsneq
= NULL
;
1825 private->gneq
= NULL
;
1826 private->conf_len
= 0;
1827 for (i
= 0; i
< 8; i
++) {
1828 kfree(private->path_conf_data
[i
]);
1829 if ((__u8
*)private->path_conf_data
[i
] ==
1830 private->conf_data
) {
1831 private->conf_data
= NULL
;
1832 private->conf_len
= 0;
1834 private->path_conf_data
[i
] = NULL
;
1836 kfree(private->conf_data
);
1837 private->conf_data
= NULL
;
1840 static struct dasd_ccw_req
*
1841 dasd_eckd_analysis_ccw(struct dasd_device
*device
)
1843 struct dasd_eckd_private
*private = device
->private;
1844 struct eckd_count
*count_data
;
1845 struct LO_eckd_data
*LO_data
;
1846 struct dasd_ccw_req
*cqr
;
1848 int cplength
, datasize
;
1852 datasize
= sizeof(struct DE_eckd_data
) + 2*sizeof(struct LO_eckd_data
);
1853 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, cplength
, datasize
, device
);
1857 /* Define extent for the first 3 tracks. */
1858 define_extent(ccw
++, cqr
->data
, 0, 2,
1859 DASD_ECKD_CCW_READ_COUNT
, device
);
1860 LO_data
= cqr
->data
+ sizeof(struct DE_eckd_data
);
1861 /* Locate record for the first 4 records on track 0. */
1862 ccw
[-1].flags
|= CCW_FLAG_CC
;
1863 locate_record(ccw
++, LO_data
++, 0, 0, 4,
1864 DASD_ECKD_CCW_READ_COUNT
, device
, 0);
1866 count_data
= private->count_area
;
1867 for (i
= 0; i
< 4; i
++) {
1868 ccw
[-1].flags
|= CCW_FLAG_CC
;
1869 ccw
->cmd_code
= DASD_ECKD_CCW_READ_COUNT
;
1872 ccw
->cda
= (__u32
)(addr_t
) count_data
;
1877 /* Locate record for the first record on track 2. */
1878 ccw
[-1].flags
|= CCW_FLAG_CC
;
1879 locate_record(ccw
++, LO_data
++, 2, 0, 1,
1880 DASD_ECKD_CCW_READ_COUNT
, device
, 0);
1881 /* Read count ccw. */
1882 ccw
[-1].flags
|= CCW_FLAG_CC
;
1883 ccw
->cmd_code
= DASD_ECKD_CCW_READ_COUNT
;
1886 ccw
->cda
= (__u32
)(addr_t
) count_data
;
1889 cqr
->startdev
= device
;
1890 cqr
->memdev
= device
;
1892 cqr
->buildclk
= get_tod_clock();
1893 cqr
->status
= DASD_CQR_FILLED
;
1897 /* differentiate between 'no record found' and any other error */
1898 static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req
*init_cqr
)
1901 if (init_cqr
->status
== DASD_CQR_DONE
)
1903 else if (init_cqr
->status
== DASD_CQR_NEED_ERP
||
1904 init_cqr
->status
== DASD_CQR_FAILED
) {
1905 sense
= dasd_get_sense(&init_cqr
->irb
);
1906 if (sense
&& (sense
[1] & SNS1_NO_REC_FOUND
))
1907 return INIT_CQR_UNFORMATTED
;
1909 return INIT_CQR_ERROR
;
1911 return INIT_CQR_ERROR
;
1915 * This is the callback function for the init_analysis cqr. It saves
1916 * the status of the initial analysis ccw before it frees it and kicks
1917 * the device to continue the startup sequence. This will call
1918 * dasd_eckd_do_analysis again (if the devices has not been marked
1919 * for deletion in the meantime).
1921 static void dasd_eckd_analysis_callback(struct dasd_ccw_req
*init_cqr
,
1924 struct dasd_device
*device
= init_cqr
->startdev
;
1925 struct dasd_eckd_private
*private = device
->private;
1927 private->init_cqr_status
= dasd_eckd_analysis_evaluation(init_cqr
);
1928 dasd_sfree_request(init_cqr
, device
);
1929 dasd_kick_device(device
);
1932 static int dasd_eckd_start_analysis(struct dasd_block
*block
)
1934 struct dasd_ccw_req
*init_cqr
;
1936 init_cqr
= dasd_eckd_analysis_ccw(block
->base
);
1937 if (IS_ERR(init_cqr
))
1938 return PTR_ERR(init_cqr
);
1939 init_cqr
->callback
= dasd_eckd_analysis_callback
;
1940 init_cqr
->callback_data
= NULL
;
1941 init_cqr
->expires
= 5*HZ
;
1942 /* first try without ERP, so we can later handle unformatted
1943 * devices as special case
1945 clear_bit(DASD_CQR_FLAGS_USE_ERP
, &init_cqr
->flags
);
1946 init_cqr
->retries
= 0;
1947 dasd_add_request_head(init_cqr
);
1951 static int dasd_eckd_end_analysis(struct dasd_block
*block
)
1953 struct dasd_device
*device
= block
->base
;
1954 struct dasd_eckd_private
*private = device
->private;
1955 struct eckd_count
*count_area
;
1956 unsigned int sb
, blk_per_trk
;
1958 struct dasd_ccw_req
*init_cqr
;
1960 status
= private->init_cqr_status
;
1961 private->init_cqr_status
= -1;
1962 if (status
== INIT_CQR_ERROR
) {
1963 /* try again, this time with full ERP */
1964 init_cqr
= dasd_eckd_analysis_ccw(device
);
1965 dasd_sleep_on(init_cqr
);
1966 status
= dasd_eckd_analysis_evaluation(init_cqr
);
1967 dasd_sfree_request(init_cqr
, device
);
1970 if (device
->features
& DASD_FEATURE_USERAW
) {
1971 block
->bp_block
= DASD_RAW_BLOCKSIZE
;
1972 blk_per_trk
= DASD_RAW_BLOCK_PER_TRACK
;
1973 block
->s2b_shift
= 3;
1977 if (status
== INIT_CQR_UNFORMATTED
) {
1978 dev_warn(&device
->cdev
->dev
, "The DASD is not formatted\n");
1979 return -EMEDIUMTYPE
;
1980 } else if (status
== INIT_CQR_ERROR
) {
1981 dev_err(&device
->cdev
->dev
,
1982 "Detecting the DASD disk layout failed because "
1983 "of an I/O error\n");
1987 private->uses_cdl
= 1;
1988 /* Check Track 0 for Compatible Disk Layout */
1990 for (i
= 0; i
< 3; i
++) {
1991 if (private->count_area
[i
].kl
!= 4 ||
1992 private->count_area
[i
].dl
!= dasd_eckd_cdl_reclen(i
) - 4 ||
1993 private->count_area
[i
].cyl
!= 0 ||
1994 private->count_area
[i
].head
!= count_area_head
[i
] ||
1995 private->count_area
[i
].record
!= count_area_rec
[i
]) {
1996 private->uses_cdl
= 0;
2001 count_area
= &private->count_area
[4];
2003 if (private->uses_cdl
== 0) {
2004 for (i
= 0; i
< 5; i
++) {
2005 if ((private->count_area
[i
].kl
!= 0) ||
2006 (private->count_area
[i
].dl
!=
2007 private->count_area
[0].dl
) ||
2008 private->count_area
[i
].cyl
!= 0 ||
2009 private->count_area
[i
].head
!= count_area_head
[i
] ||
2010 private->count_area
[i
].record
!= count_area_rec
[i
])
2014 count_area
= &private->count_area
[0];
2016 if (private->count_area
[3].record
== 1)
2017 dev_warn(&device
->cdev
->dev
,
2018 "Track 0 has no records following the VTOC\n");
2021 if (count_area
!= NULL
&& count_area
->kl
== 0) {
2022 /* we found notthing violating our disk layout */
2023 if (dasd_check_blocksize(count_area
->dl
) == 0)
2024 block
->bp_block
= count_area
->dl
;
2026 if (block
->bp_block
== 0) {
2027 dev_warn(&device
->cdev
->dev
,
2028 "The disk layout of the DASD is not supported\n");
2029 return -EMEDIUMTYPE
;
2031 block
->s2b_shift
= 0; /* bits to shift 512 to get a block */
2032 for (sb
= 512; sb
< block
->bp_block
; sb
= sb
<< 1)
2035 blk_per_trk
= recs_per_track(&private->rdc_data
, 0, block
->bp_block
);
2038 block
->blocks
= (private->real_cyl
*
2039 private->rdc_data
.trk_per_cyl
*
2042 dev_info(&device
->cdev
->dev
,
2043 "DASD with %d KB/block, %d KB total size, %d KB/track, "
2044 "%s\n", (block
->bp_block
>> 10),
2045 ((private->real_cyl
*
2046 private->rdc_data
.trk_per_cyl
*
2047 blk_per_trk
* (block
->bp_block
>> 9)) >> 1),
2048 ((blk_per_trk
* block
->bp_block
) >> 10),
2050 "compatible disk layout" : "linux disk layout");
2055 static int dasd_eckd_do_analysis(struct dasd_block
*block
)
2057 struct dasd_eckd_private
*private = block
->base
->private;
2059 if (private->init_cqr_status
< 0)
2060 return dasd_eckd_start_analysis(block
);
2062 return dasd_eckd_end_analysis(block
);
2065 static int dasd_eckd_basic_to_ready(struct dasd_device
*device
)
2067 return dasd_alias_add_device(device
);
2070 static int dasd_eckd_online_to_ready(struct dasd_device
*device
)
2072 cancel_work_sync(&device
->reload_device
);
2073 cancel_work_sync(&device
->kick_validate
);
2077 static int dasd_eckd_basic_to_known(struct dasd_device
*device
)
2079 return dasd_alias_remove_device(device
);
2083 dasd_eckd_fill_geometry(struct dasd_block
*block
, struct hd_geometry
*geo
)
2085 struct dasd_eckd_private
*private = block
->base
->private;
2087 if (dasd_check_blocksize(block
->bp_block
) == 0) {
2088 geo
->sectors
= recs_per_track(&private->rdc_data
,
2089 0, block
->bp_block
);
2091 geo
->cylinders
= private->rdc_data
.no_cyl
;
2092 geo
->heads
= private->rdc_data
.trk_per_cyl
;
2096 static struct dasd_ccw_req
*
2097 dasd_eckd_build_format(struct dasd_device
*base
,
2098 struct format_data_t
*fdata
,
2101 struct dasd_eckd_private
*base_priv
;
2102 struct dasd_eckd_private
*start_priv
;
2103 struct dasd_device
*startdev
= NULL
;
2104 struct dasd_ccw_req
*fcp
;
2105 struct eckd_count
*ect
;
2106 struct ch_t address
;
2110 int cplength
, datasize
;
2118 startdev
= dasd_alias_get_start_dev(base
);
2123 start_priv
= startdev
->private;
2124 base_priv
= base
->private;
2126 rpt
= recs_per_track(&base_priv
->rdc_data
, 0, fdata
->blksize
);
2128 nr_tracks
= fdata
->stop_unit
- fdata
->start_unit
+ 1;
2131 * fdata->intensity is a bit string that tells us what to do:
2132 * Bit 0: write record zero
2133 * Bit 1: write home address, currently not supported
2134 * Bit 2: invalidate tracks
2135 * Bit 3: use OS/390 compatible disk layout (cdl)
2136 * Bit 4: do not allow storage subsystem to modify record zero
2137 * Only some bit combinations do make sense.
2139 if (fdata
->intensity
& 0x10) {
2141 intensity
= fdata
->intensity
& ~0x10;
2144 intensity
= fdata
->intensity
;
2147 use_prefix
= base_priv
->features
.feature
[8] & 0x01;
2149 switch (intensity
) {
2150 case 0x00: /* Normal format */
2151 case 0x08: /* Normal format, use cdl. */
2152 cplength
= 2 + (rpt
*nr_tracks
);
2154 datasize
= sizeof(struct PFX_eckd_data
) +
2155 sizeof(struct LO_eckd_data
) +
2156 rpt
* nr_tracks
* sizeof(struct eckd_count
);
2158 datasize
= sizeof(struct DE_eckd_data
) +
2159 sizeof(struct LO_eckd_data
) +
2160 rpt
* nr_tracks
* sizeof(struct eckd_count
);
2162 case 0x01: /* Write record zero and format track. */
2163 case 0x09: /* Write record zero and format track, use cdl. */
2164 cplength
= 2 + rpt
* nr_tracks
;
2166 datasize
= sizeof(struct PFX_eckd_data
) +
2167 sizeof(struct LO_eckd_data
) +
2168 sizeof(struct eckd_count
) +
2169 rpt
* nr_tracks
* sizeof(struct eckd_count
);
2171 datasize
= sizeof(struct DE_eckd_data
) +
2172 sizeof(struct LO_eckd_data
) +
2173 sizeof(struct eckd_count
) +
2174 rpt
* nr_tracks
* sizeof(struct eckd_count
);
2176 case 0x04: /* Invalidate track. */
2177 case 0x0c: /* Invalidate track, use cdl. */
2180 datasize
= sizeof(struct PFX_eckd_data
) +
2181 sizeof(struct LO_eckd_data
) +
2182 sizeof(struct eckd_count
);
2184 datasize
= sizeof(struct DE_eckd_data
) +
2185 sizeof(struct LO_eckd_data
) +
2186 sizeof(struct eckd_count
);
2189 dev_warn(&startdev
->cdev
->dev
,
2190 "An I/O control call used incorrect flags 0x%x\n",
2192 return ERR_PTR(-EINVAL
);
2194 /* Allocate the format ccw request. */
2195 fcp
= dasd_smalloc_request(DASD_ECKD_MAGIC
, cplength
,
2196 datasize
, startdev
);
2200 start_priv
->count
++;
2204 switch (intensity
& ~0x08) {
2205 case 0x00: /* Normal format. */
2207 prefix(ccw
++, (struct PFX_eckd_data
*) data
,
2208 fdata
->start_unit
, fdata
->stop_unit
,
2209 DASD_ECKD_CCW_WRITE_CKD
, base
, startdev
);
2210 /* grant subsystem permission to format R0 */
2212 ((struct PFX_eckd_data
*)data
)
2213 ->define_extent
.ga_extended
|= 0x04;
2214 data
+= sizeof(struct PFX_eckd_data
);
2216 define_extent(ccw
++, (struct DE_eckd_data
*) data
,
2217 fdata
->start_unit
, fdata
->stop_unit
,
2218 DASD_ECKD_CCW_WRITE_CKD
, startdev
);
2219 /* grant subsystem permission to format R0 */
2221 ((struct DE_eckd_data
*) data
)
2222 ->ga_extended
|= 0x04;
2223 data
+= sizeof(struct DE_eckd_data
);
2225 ccw
[-1].flags
|= CCW_FLAG_CC
;
2226 locate_record(ccw
++, (struct LO_eckd_data
*) data
,
2227 fdata
->start_unit
, 0, rpt
*nr_tracks
,
2228 DASD_ECKD_CCW_WRITE_CKD
, base
,
2230 data
+= sizeof(struct LO_eckd_data
);
2232 case 0x01: /* Write record zero + format track. */
2234 prefix(ccw
++, (struct PFX_eckd_data
*) data
,
2235 fdata
->start_unit
, fdata
->stop_unit
,
2236 DASD_ECKD_CCW_WRITE_RECORD_ZERO
,
2238 data
+= sizeof(struct PFX_eckd_data
);
2240 define_extent(ccw
++, (struct DE_eckd_data
*) data
,
2241 fdata
->start_unit
, fdata
->stop_unit
,
2242 DASD_ECKD_CCW_WRITE_RECORD_ZERO
, startdev
);
2243 data
+= sizeof(struct DE_eckd_data
);
2245 ccw
[-1].flags
|= CCW_FLAG_CC
;
2246 locate_record(ccw
++, (struct LO_eckd_data
*) data
,
2247 fdata
->start_unit
, 0, rpt
* nr_tracks
+ 1,
2248 DASD_ECKD_CCW_WRITE_RECORD_ZERO
, base
,
2249 base
->block
->bp_block
);
2250 data
+= sizeof(struct LO_eckd_data
);
2252 case 0x04: /* Invalidate track. */
2254 prefix(ccw
++, (struct PFX_eckd_data
*) data
,
2255 fdata
->start_unit
, fdata
->stop_unit
,
2256 DASD_ECKD_CCW_WRITE_CKD
, base
, startdev
);
2257 data
+= sizeof(struct PFX_eckd_data
);
2259 define_extent(ccw
++, (struct DE_eckd_data
*) data
,
2260 fdata
->start_unit
, fdata
->stop_unit
,
2261 DASD_ECKD_CCW_WRITE_CKD
, startdev
);
2262 data
+= sizeof(struct DE_eckd_data
);
2264 ccw
[-1].flags
|= CCW_FLAG_CC
;
2265 locate_record(ccw
++, (struct LO_eckd_data
*) data
,
2266 fdata
->start_unit
, 0, 1,
2267 DASD_ECKD_CCW_WRITE_CKD
, base
, 8);
2268 data
+= sizeof(struct LO_eckd_data
);
2272 for (j
= 0; j
< nr_tracks
; j
++) {
2273 /* calculate cylinder and head for the current track */
2275 (fdata
->start_unit
+ j
) /
2276 base_priv
->rdc_data
.trk_per_cyl
,
2277 (fdata
->start_unit
+ j
) %
2278 base_priv
->rdc_data
.trk_per_cyl
);
2279 if (intensity
& 0x01) { /* write record zero */
2280 ect
= (struct eckd_count
*) data
;
2281 data
+= sizeof(struct eckd_count
);
2282 ect
->cyl
= address
.cyl
;
2283 ect
->head
= address
.head
;
2287 ccw
[-1].flags
|= CCW_FLAG_CC
;
2288 ccw
->cmd_code
= DASD_ECKD_CCW_WRITE_RECORD_ZERO
;
2289 ccw
->flags
= CCW_FLAG_SLI
;
2291 ccw
->cda
= (__u32
)(addr_t
) ect
;
2294 if ((intensity
& ~0x08) & 0x04) { /* erase track */
2295 ect
= (struct eckd_count
*) data
;
2296 data
+= sizeof(struct eckd_count
);
2297 ect
->cyl
= address
.cyl
;
2298 ect
->head
= address
.head
;
2302 ccw
[-1].flags
|= CCW_FLAG_CC
;
2303 ccw
->cmd_code
= DASD_ECKD_CCW_WRITE_CKD
;
2304 ccw
->flags
= CCW_FLAG_SLI
;
2306 ccw
->cda
= (__u32
)(addr_t
) ect
;
2307 } else { /* write remaining records */
2308 for (i
= 0; i
< rpt
; i
++) {
2309 ect
= (struct eckd_count
*) data
;
2310 data
+= sizeof(struct eckd_count
);
2311 ect
->cyl
= address
.cyl
;
2312 ect
->head
= address
.head
;
2313 ect
->record
= i
+ 1;
2315 ect
->dl
= fdata
->blksize
;
2317 * Check for special tracks 0-1
2318 * when formatting CDL
2320 if ((intensity
& 0x08) &&
2321 address
.cyl
== 0 && address
.head
== 0) {
2324 ect
->dl
= sizes_trk0
[i
] - 4;
2327 if ((intensity
& 0x08) &&
2328 address
.cyl
== 0 && address
.head
== 1) {
2330 ect
->dl
= LABEL_SIZE
- 44;
2332 ccw
[-1].flags
|= CCW_FLAG_CC
;
2333 if (i
!= 0 || j
== 0)
2335 DASD_ECKD_CCW_WRITE_CKD
;
2338 DASD_ECKD_CCW_WRITE_CKD_MT
;
2339 ccw
->flags
= CCW_FLAG_SLI
;
2341 ccw
->cda
= (__u32
)(addr_t
) ect
;
2347 fcp
->startdev
= startdev
;
2348 fcp
->memdev
= startdev
;
2349 fcp
->basedev
= base
;
2351 fcp
->expires
= startdev
->default_expires
* HZ
;
2352 fcp
->buildclk
= get_tod_clock();
2353 fcp
->status
= DASD_CQR_FILLED
;
2359 * Wrapper function to build a CCW request depending on input data
2361 static struct dasd_ccw_req
*
2362 dasd_eckd_format_build_ccw_req(struct dasd_device
*base
,
2363 struct format_data_t
*fdata
, int enable_pav
)
2365 return dasd_eckd_build_format(base
, fdata
, enable_pav
);
2369 * Sanity checks on format_data
2371 static int dasd_eckd_format_sanity_checks(struct dasd_device
*base
,
2372 struct format_data_t
*fdata
)
2374 struct dasd_eckd_private
*private = base
->private;
2376 if (fdata
->start_unit
>=
2377 (private->real_cyl
* private->rdc_data
.trk_per_cyl
)) {
2378 dev_warn(&base
->cdev
->dev
,
2379 "Start track number %u used in formatting is too big\n",
2383 if (fdata
->stop_unit
>=
2384 (private->real_cyl
* private->rdc_data
.trk_per_cyl
)) {
2385 dev_warn(&base
->cdev
->dev
,
2386 "Stop track number %u used in formatting is too big\n",
2390 if (fdata
->start_unit
> fdata
->stop_unit
) {
2391 dev_warn(&base
->cdev
->dev
,
2392 "Start track %u used in formatting exceeds end track\n",
2396 if (dasd_check_blocksize(fdata
->blksize
) != 0) {
2397 dev_warn(&base
->cdev
->dev
,
2398 "The DASD cannot be formatted with block size %u\n",
2406 * This function will process format_data originally coming from an IOCTL
2408 static int dasd_eckd_format_process_data(struct dasd_device
*base
,
2409 struct format_data_t
*fdata
,
2412 struct dasd_eckd_private
*private = base
->private;
2413 struct dasd_ccw_req
*cqr
, *n
;
2414 struct list_head format_queue
;
2415 struct dasd_device
*device
;
2416 int old_start
, old_stop
, format_step
;
2420 rc
= dasd_eckd_format_sanity_checks(base
, fdata
);
2424 INIT_LIST_HEAD(&format_queue
);
2426 old_start
= fdata
->start_unit
;
2427 old_stop
= fdata
->stop_unit
;
2429 format_step
= DASD_CQR_MAX_CCW
/ recs_per_track(&private->rdc_data
, 0,
2433 while (fdata
->start_unit
<= old_stop
) {
2434 step
= fdata
->stop_unit
- fdata
->start_unit
+ 1;
2435 if (step
> format_step
) {
2437 fdata
->start_unit
+ format_step
- 1;
2440 cqr
= dasd_eckd_format_build_ccw_req(base
, fdata
,
2444 if (rc
== -ENOMEM
) {
2445 if (list_empty(&format_queue
))
2448 * not enough memory available, start
2449 * requests retry after first requests
2457 list_add_tail(&cqr
->blocklist
, &format_queue
);
2459 fdata
->start_unit
= fdata
->stop_unit
+ 1;
2460 fdata
->stop_unit
= old_stop
;
2463 rc
= dasd_sleep_on_queue(&format_queue
);
2466 list_for_each_entry_safe(cqr
, n
, &format_queue
, blocklist
) {
2467 device
= cqr
->startdev
;
2468 private = device
->private;
2469 if (cqr
->status
== DASD_CQR_FAILED
)
2471 list_del_init(&cqr
->blocklist
);
2472 dasd_sfree_request(cqr
, device
);
2482 fdata
->start_unit
= old_start
;
2483 fdata
->stop_unit
= old_stop
;
2488 static int dasd_eckd_format_device(struct dasd_device
*base
,
2489 struct format_data_t
*fdata
, int enable_pav
)
2491 return dasd_eckd_format_process_data(base
, fdata
, enable_pav
);
2494 static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req
*cqr
)
2496 if (cqr
->retries
< 0) {
2497 cqr
->status
= DASD_CQR_FAILED
;
2500 cqr
->status
= DASD_CQR_FILLED
;
2501 if (cqr
->block
&& (cqr
->startdev
!= cqr
->block
->base
)) {
2502 dasd_eckd_reset_ccw_to_base_io(cqr
);
2503 cqr
->startdev
= cqr
->block
->base
;
2504 cqr
->lpm
= cqr
->block
->base
->path_data
.opm
;
2508 static dasd_erp_fn_t
2509 dasd_eckd_erp_action(struct dasd_ccw_req
* cqr
)
2511 struct dasd_device
*device
= (struct dasd_device
*) cqr
->startdev
;
2512 struct ccw_device
*cdev
= device
->cdev
;
2514 switch (cdev
->id
.cu_type
) {
2519 return dasd_3990_erp_action
;
2523 return dasd_default_erp_action
;
2527 static dasd_erp_fn_t
2528 dasd_eckd_erp_postaction(struct dasd_ccw_req
* cqr
)
2530 return dasd_default_erp_postaction
;
2533 static void dasd_eckd_check_for_device_change(struct dasd_device
*device
,
2534 struct dasd_ccw_req
*cqr
,
2539 struct dasd_eckd_private
*private = device
->private;
2541 /* first of all check for state change pending interrupt */
2542 mask
= DEV_STAT_ATTENTION
| DEV_STAT_DEV_END
| DEV_STAT_UNIT_EXCEP
;
2543 if ((scsw_dstat(&irb
->scsw
) & mask
) == mask
) {
2545 * for alias only, not in offline processing
2546 * and only if not suspended
2548 if (!device
->block
&& private->lcu
&&
2549 device
->state
== DASD_STATE_ONLINE
&&
2550 !test_bit(DASD_FLAG_OFFLINE
, &device
->flags
) &&
2551 !test_bit(DASD_FLAG_SUSPENDED
, &device
->flags
)) {
2553 * the state change could be caused by an alias
2554 * reassignment remove device from alias handling
2555 * to prevent new requests from being scheduled on
2556 * the wrong alias device
2558 dasd_alias_remove_device(device
);
2560 /* schedule worker to reload device */
2561 dasd_reload_device(device
);
2563 dasd_generic_handle_state_change(device
);
2567 sense
= dasd_get_sense(irb
);
2571 /* summary unit check */
2572 if ((sense
[27] & DASD_SENSE_BIT_0
) && (sense
[7] == 0x0D) &&
2573 (scsw_dstat(&irb
->scsw
) & DEV_STAT_UNIT_CHECK
)) {
2574 dasd_alias_handle_summary_unit_check(device
, irb
);
2578 /* service information message SIM */
2579 if (!cqr
&& !(sense
[27] & DASD_SENSE_BIT_0
) &&
2580 ((sense
[6] & DASD_SIM_SENSE
) == DASD_SIM_SENSE
)) {
2581 dasd_3990_erp_handle_sim(device
, sense
);
2585 /* loss of device reservation is handled via base devices only
2586 * as alias devices may be used with several bases
2588 if (device
->block
&& (sense
[27] & DASD_SENSE_BIT_0
) &&
2589 (sense
[7] == 0x3F) &&
2590 (scsw_dstat(&irb
->scsw
) & DEV_STAT_UNIT_CHECK
) &&
2591 test_bit(DASD_FLAG_IS_RESERVED
, &device
->flags
)) {
2592 if (device
->features
& DASD_FEATURE_FAILONSLCK
)
2593 set_bit(DASD_FLAG_LOCK_STOLEN
, &device
->flags
);
2594 clear_bit(DASD_FLAG_IS_RESERVED
, &device
->flags
);
2595 dev_err(&device
->cdev
->dev
,
2596 "The device reservation was lost\n");
2600 static struct dasd_ccw_req
*dasd_eckd_build_cp_cmd_single(
2601 struct dasd_device
*startdev
,
2602 struct dasd_block
*block
,
2603 struct request
*req
,
2608 unsigned int first_offs
,
2609 unsigned int last_offs
,
2610 unsigned int blk_per_trk
,
2611 unsigned int blksize
)
2613 struct dasd_eckd_private
*private;
2614 unsigned long *idaws
;
2615 struct LO_eckd_data
*LO_data
;
2616 struct dasd_ccw_req
*cqr
;
2618 struct req_iterator iter
;
2622 int count
, cidaw
, cplength
, datasize
;
2624 unsigned char cmd
, rcmd
;
2626 struct dasd_device
*basedev
;
2628 basedev
= block
->base
;
2629 private = basedev
->private;
2630 if (rq_data_dir(req
) == READ
)
2631 cmd
= DASD_ECKD_CCW_READ_MT
;
2632 else if (rq_data_dir(req
) == WRITE
)
2633 cmd
= DASD_ECKD_CCW_WRITE_MT
;
2635 return ERR_PTR(-EINVAL
);
2637 /* Check struct bio and count the number of blocks for the request. */
2640 rq_for_each_segment(bv
, req
, iter
) {
2641 if (bv
.bv_len
& (blksize
- 1))
2642 /* Eckd can only do full blocks. */
2643 return ERR_PTR(-EINVAL
);
2644 count
+= bv
.bv_len
>> (block
->s2b_shift
+ 9);
2645 if (idal_is_needed (page_address(bv
.bv_page
), bv
.bv_len
))
2646 cidaw
+= bv
.bv_len
>> (block
->s2b_shift
+ 9);
2649 if (count
!= last_rec
- first_rec
+ 1)
2650 return ERR_PTR(-EINVAL
);
2652 /* use the prefix command if available */
2653 use_prefix
= private->features
.feature
[8] & 0x01;
2655 /* 1x prefix + number of blocks */
2656 cplength
= 2 + count
;
2657 /* 1x prefix + cidaws*sizeof(long) */
2658 datasize
= sizeof(struct PFX_eckd_data
) +
2659 sizeof(struct LO_eckd_data
) +
2660 cidaw
* sizeof(unsigned long);
2662 /* 1x define extent + 1x locate record + number of blocks */
2663 cplength
= 2 + count
;
2664 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */
2665 datasize
= sizeof(struct DE_eckd_data
) +
2666 sizeof(struct LO_eckd_data
) +
2667 cidaw
* sizeof(unsigned long);
2669 /* Find out the number of additional locate record ccws for cdl. */
2670 if (private->uses_cdl
&& first_rec
< 2*blk_per_trk
) {
2671 if (last_rec
>= 2*blk_per_trk
)
2672 count
= 2*blk_per_trk
- first_rec
;
2674 datasize
+= count
*sizeof(struct LO_eckd_data
);
2676 /* Allocate the ccw request. */
2677 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, cplength
, datasize
,
2682 /* First ccw is define extent or prefix. */
2684 if (prefix(ccw
++, cqr
->data
, first_trk
,
2685 last_trk
, cmd
, basedev
, startdev
) == -EAGAIN
) {
2686 /* Clock not in sync and XRC is enabled.
2689 dasd_sfree_request(cqr
, startdev
);
2690 return ERR_PTR(-EAGAIN
);
2692 idaws
= (unsigned long *) (cqr
->data
+
2693 sizeof(struct PFX_eckd_data
));
2695 if (define_extent(ccw
++, cqr
->data
, first_trk
,
2696 last_trk
, cmd
, basedev
) == -EAGAIN
) {
2697 /* Clock not in sync and XRC is enabled.
2700 dasd_sfree_request(cqr
, startdev
);
2701 return ERR_PTR(-EAGAIN
);
2703 idaws
= (unsigned long *) (cqr
->data
+
2704 sizeof(struct DE_eckd_data
));
2706 /* Build locate_record+read/write/ccws. */
2707 LO_data
= (struct LO_eckd_data
*) (idaws
+ cidaw
);
2709 if (private->uses_cdl
== 0 || recid
> 2*blk_per_trk
) {
2710 /* Only standard blocks so there is just one locate record. */
2711 ccw
[-1].flags
|= CCW_FLAG_CC
;
2712 locate_record(ccw
++, LO_data
++, first_trk
, first_offs
+ 1,
2713 last_rec
- recid
+ 1, cmd
, basedev
, blksize
);
2715 rq_for_each_segment(bv
, req
, iter
) {
2716 dst
= page_address(bv
.bv_page
) + bv
.bv_offset
;
2717 if (dasd_page_cache
) {
2718 char *copy
= kmem_cache_alloc(dasd_page_cache
,
2719 GFP_DMA
| __GFP_NOWARN
);
2720 if (copy
&& rq_data_dir(req
) == WRITE
)
2721 memcpy(copy
+ bv
.bv_offset
, dst
, bv
.bv_len
);
2723 dst
= copy
+ bv
.bv_offset
;
2725 for (off
= 0; off
< bv
.bv_len
; off
+= blksize
) {
2726 sector_t trkid
= recid
;
2727 unsigned int recoffs
= sector_div(trkid
, blk_per_trk
);
2730 /* Locate record for cdl special block ? */
2731 if (private->uses_cdl
&& recid
< 2*blk_per_trk
) {
2732 if (dasd_eckd_cdl_special(blk_per_trk
, recid
)){
2734 count
= dasd_eckd_cdl_reclen(recid
);
2735 if (count
< blksize
&&
2736 rq_data_dir(req
) == READ
)
2737 memset(dst
+ count
, 0xe5,
2740 ccw
[-1].flags
|= CCW_FLAG_CC
;
2741 locate_record(ccw
++, LO_data
++,
2743 1, rcmd
, basedev
, count
);
2745 /* Locate record for standard blocks ? */
2746 if (private->uses_cdl
&& recid
== 2*blk_per_trk
) {
2747 ccw
[-1].flags
|= CCW_FLAG_CC
;
2748 locate_record(ccw
++, LO_data
++,
2750 last_rec
- recid
+ 1,
2751 cmd
, basedev
, count
);
2753 /* Read/write ccw. */
2754 ccw
[-1].flags
|= CCW_FLAG_CC
;
2755 ccw
->cmd_code
= rcmd
;
2757 if (idal_is_needed(dst
, blksize
)) {
2758 ccw
->cda
= (__u32
)(addr_t
) idaws
;
2759 ccw
->flags
= CCW_FLAG_IDA
;
2760 idaws
= idal_create_words(idaws
, dst
, blksize
);
2762 ccw
->cda
= (__u32
)(addr_t
) dst
;
2770 if (blk_noretry_request(req
) ||
2771 block
->base
->features
& DASD_FEATURE_FAILFAST
)
2772 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
2773 cqr
->startdev
= startdev
;
2774 cqr
->memdev
= startdev
;
2776 cqr
->expires
= startdev
->default_expires
* HZ
; /* default 5 minutes */
2777 cqr
->lpm
= startdev
->path_data
.ppm
;
2778 cqr
->retries
= startdev
->default_retries
;
2779 cqr
->buildclk
= get_tod_clock();
2780 cqr
->status
= DASD_CQR_FILLED
;
2784 static struct dasd_ccw_req
*dasd_eckd_build_cp_cmd_track(
2785 struct dasd_device
*startdev
,
2786 struct dasd_block
*block
,
2787 struct request
*req
,
2792 unsigned int first_offs
,
2793 unsigned int last_offs
,
2794 unsigned int blk_per_trk
,
2795 unsigned int blksize
)
2797 unsigned long *idaws
;
2798 struct dasd_ccw_req
*cqr
;
2800 struct req_iterator iter
;
2802 char *dst
, *idaw_dst
;
2803 unsigned int cidaw
, cplength
, datasize
;
2807 struct dasd_device
*basedev
;
2808 unsigned int trkcount
, count
, count_to_trk_end
;
2809 unsigned int idaw_len
, seg_len
, part_len
, len_to_track_end
;
2810 unsigned char new_track
, end_idaw
;
2812 unsigned int recoffs
;
2814 basedev
= block
->base
;
2815 if (rq_data_dir(req
) == READ
)
2816 cmd
= DASD_ECKD_CCW_READ_TRACK_DATA
;
2817 else if (rq_data_dir(req
) == WRITE
)
2818 cmd
= DASD_ECKD_CCW_WRITE_TRACK_DATA
;
2820 return ERR_PTR(-EINVAL
);
2822 /* Track based I/O needs IDAWs for each page, and not just for
2823 * 64 bit addresses. We need additional idals for pages
2824 * that get filled from two tracks, so we use the number
2825 * of records as upper limit.
2827 cidaw
= last_rec
- first_rec
+ 1;
2828 trkcount
= last_trk
- first_trk
+ 1;
2830 /* 1x prefix + one read/write ccw per track */
2831 cplength
= 1 + trkcount
;
2833 /* on 31-bit we need space for two 32 bit addresses per page
2834 * on 64-bit one 64 bit address
2836 datasize
= sizeof(struct PFX_eckd_data
) +
2837 cidaw
* sizeof(unsigned long long);
2839 /* Allocate the ccw request. */
2840 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, cplength
, datasize
,
2845 /* transfer length factor: how many bytes to read from the last track */
2846 if (first_trk
== last_trk
)
2847 tlf
= last_offs
- first_offs
+ 1;
2849 tlf
= last_offs
+ 1;
2852 if (prefix_LRE(ccw
++, cqr
->data
, first_trk
,
2853 last_trk
, cmd
, basedev
, startdev
,
2854 1 /* format */, first_offs
+ 1,
2857 /* Clock not in sync and XRC is enabled.
2860 dasd_sfree_request(cqr
, startdev
);
2861 return ERR_PTR(-EAGAIN
);
2865 * The translation of request into ccw programs must meet the
2866 * following conditions:
2867 * - all idaws but the first and the last must address full pages
2868 * (or 2K blocks on 31-bit)
2869 * - the scope of a ccw and it's idal ends with the track boundaries
2871 idaws
= (unsigned long *) (cqr
->data
+ sizeof(struct PFX_eckd_data
));
2875 len_to_track_end
= 0;
2878 rq_for_each_segment(bv
, req
, iter
) {
2879 dst
= page_address(bv
.bv_page
) + bv
.bv_offset
;
2880 seg_len
= bv
.bv_len
;
2884 recoffs
= sector_div(trkid
, blk_per_trk
);
2885 count_to_trk_end
= blk_per_trk
- recoffs
;
2886 count
= min((last_rec
- recid
+ 1),
2887 (sector_t
)count_to_trk_end
);
2888 len_to_track_end
= count
* blksize
;
2889 ccw
[-1].flags
|= CCW_FLAG_CC
;
2890 ccw
->cmd_code
= cmd
;
2891 ccw
->count
= len_to_track_end
;
2892 ccw
->cda
= (__u32
)(addr_t
)idaws
;
2893 ccw
->flags
= CCW_FLAG_IDA
;
2897 /* first idaw for a ccw may start anywhere */
2901 /* If we start a new idaw, we must make sure that it
2902 * starts on an IDA_BLOCK_SIZE boundary.
2903 * If we continue an idaw, we must make sure that the
2904 * current segment begins where the so far accumulated
2908 if (__pa(dst
) & (IDA_BLOCK_SIZE
-1)) {
2909 dasd_sfree_request(cqr
, startdev
);
2910 return ERR_PTR(-ERANGE
);
2914 if ((idaw_dst
+ idaw_len
) != dst
) {
2915 dasd_sfree_request(cqr
, startdev
);
2916 return ERR_PTR(-ERANGE
);
2918 part_len
= min(seg_len
, len_to_track_end
);
2919 seg_len
-= part_len
;
2921 idaw_len
+= part_len
;
2922 len_to_track_end
-= part_len
;
2923 /* collected memory area ends on an IDA_BLOCK border,
2925 * idal_create_words will handle cases where idaw_len
2926 * is larger then IDA_BLOCK_SIZE
2928 if (!(__pa(idaw_dst
+ idaw_len
) & (IDA_BLOCK_SIZE
-1)))
2930 /* We also need to end the idaw at track end */
2931 if (!len_to_track_end
) {
2936 idaws
= idal_create_words(idaws
, idaw_dst
,
2945 if (blk_noretry_request(req
) ||
2946 block
->base
->features
& DASD_FEATURE_FAILFAST
)
2947 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
2948 cqr
->startdev
= startdev
;
2949 cqr
->memdev
= startdev
;
2951 cqr
->expires
= startdev
->default_expires
* HZ
; /* default 5 minutes */
2952 cqr
->lpm
= startdev
->path_data
.ppm
;
2953 cqr
->retries
= startdev
->default_retries
;
2954 cqr
->buildclk
= get_tod_clock();
2955 cqr
->status
= DASD_CQR_FILLED
;
2959 static int prepare_itcw(struct itcw
*itcw
,
2960 unsigned int trk
, unsigned int totrk
, int cmd
,
2961 struct dasd_device
*basedev
,
2962 struct dasd_device
*startdev
,
2963 unsigned int rec_on_trk
, int count
,
2964 unsigned int blksize
,
2965 unsigned int total_data_size
,
2967 unsigned int blk_per_trk
)
2969 struct PFX_eckd_data pfxdata
;
2970 struct dasd_eckd_private
*basepriv
, *startpriv
;
2971 struct DE_eckd_data
*dedata
;
2972 struct LRE_eckd_data
*lredata
;
2976 u16 heads
, beghead
, endhead
;
2984 /* setup prefix data */
2985 basepriv
= basedev
->private;
2986 startpriv
= startdev
->private;
2987 dedata
= &pfxdata
.define_extent
;
2988 lredata
= &pfxdata
.locate_record
;
2990 memset(&pfxdata
, 0, sizeof(pfxdata
));
2991 pfxdata
.format
= 1; /* PFX with LRE */
2992 pfxdata
.base_address
= basepriv
->ned
->unit_addr
;
2993 pfxdata
.base_lss
= basepriv
->ned
->ID
;
2994 pfxdata
.validity
.define_extent
= 1;
2996 /* private uid is kept up to date, conf_data may be outdated */
2997 if (startpriv
->uid
.type
!= UA_BASE_DEVICE
) {
2998 pfxdata
.validity
.verify_base
= 1;
2999 if (startpriv
->uid
.type
== UA_HYPER_PAV_ALIAS
)
3000 pfxdata
.validity
.hyper_pav
= 1;
3004 case DASD_ECKD_CCW_READ_TRACK_DATA
:
3005 dedata
->mask
.perm
= 0x1;
3006 dedata
->attributes
.operation
= basepriv
->attrib
.operation
;
3007 dedata
->blk_size
= blksize
;
3008 dedata
->ga_extended
|= 0x42;
3009 lredata
->operation
.orientation
= 0x0;
3010 lredata
->operation
.operation
= 0x0C;
3011 lredata
->auxiliary
.check_bytes
= 0x01;
3012 pfx_cmd
= DASD_ECKD_CCW_PFX_READ
;
3014 case DASD_ECKD_CCW_WRITE_TRACK_DATA
:
3015 dedata
->mask
.perm
= 0x02;
3016 dedata
->attributes
.operation
= basepriv
->attrib
.operation
;
3017 dedata
->blk_size
= blksize
;
3018 rc
= check_XRC_on_prefix(&pfxdata
, basedev
);
3019 dedata
->ga_extended
|= 0x42;
3020 lredata
->operation
.orientation
= 0x0;
3021 lredata
->operation
.operation
= 0x3F;
3022 lredata
->extended_operation
= 0x23;
3023 lredata
->auxiliary
.check_bytes
= 0x2;
3024 pfx_cmd
= DASD_ECKD_CCW_PFX
;
3027 DBF_DEV_EVENT(DBF_ERR
, basedev
,
3028 "prepare itcw, unknown opcode 0x%x", cmd
);
3035 dedata
->attributes
.mode
= 0x3; /* ECKD */
3037 heads
= basepriv
->rdc_data
.trk_per_cyl
;
3038 begcyl
= trk
/ heads
;
3039 beghead
= trk
% heads
;
3040 endcyl
= totrk
/ heads
;
3041 endhead
= totrk
% heads
;
3043 /* check for sequential prestage - enhance cylinder range */
3044 if (dedata
->attributes
.operation
== DASD_SEQ_PRESTAGE
||
3045 dedata
->attributes
.operation
== DASD_SEQ_ACCESS
) {
3047 if (endcyl
+ basepriv
->attrib
.nr_cyl
< basepriv
->real_cyl
)
3048 endcyl
+= basepriv
->attrib
.nr_cyl
;
3050 endcyl
= (basepriv
->real_cyl
- 1);
3053 set_ch_t(&dedata
->beg_ext
, begcyl
, beghead
);
3054 set_ch_t(&dedata
->end_ext
, endcyl
, endhead
);
3056 dedata
->ep_format
= 0x20; /* records per track is valid */
3057 dedata
->ep_rec_per_track
= blk_per_trk
;
3060 switch (basepriv
->rdc_data
.dev_type
) {
3062 dn
= ceil_quot(blksize
+ 6, 232);
3063 d
= 9 + ceil_quot(blksize
+ 6 * (dn
+ 1), 34);
3064 sector
= (49 + (rec_on_trk
- 1) * (10 + d
)) / 8;
3067 d
= 7 + ceil_quot(blksize
+ 12, 32);
3068 sector
= (39 + (rec_on_trk
- 1) * (8 + d
)) / 7;
3073 lredata
->auxiliary
.length_valid
= 1;
3074 lredata
->auxiliary
.length_scope
= 1;
3075 lredata
->auxiliary
.imbedded_ccw_valid
= 1;
3076 lredata
->length
= tlf
;
3077 lredata
->imbedded_ccw
= cmd
;
3078 lredata
->count
= count
;
3079 lredata
->sector
= sector
;
3080 set_ch_t(&lredata
->seek_addr
, begcyl
, beghead
);
3081 lredata
->search_arg
.cyl
= lredata
->seek_addr
.cyl
;
3082 lredata
->search_arg
.head
= lredata
->seek_addr
.head
;
3083 lredata
->search_arg
.record
= rec_on_trk
;
3085 dcw
= itcw_add_dcw(itcw
, pfx_cmd
, 0,
3086 &pfxdata
, sizeof(pfxdata
), total_data_size
);
3087 return PTR_RET(dcw
);
3090 static struct dasd_ccw_req
*dasd_eckd_build_cp_tpm_track(
3091 struct dasd_device
*startdev
,
3092 struct dasd_block
*block
,
3093 struct request
*req
,
3098 unsigned int first_offs
,
3099 unsigned int last_offs
,
3100 unsigned int blk_per_trk
,
3101 unsigned int blksize
)
3103 struct dasd_ccw_req
*cqr
;
3104 struct req_iterator iter
;
3107 unsigned int trkcount
, ctidaw
;
3109 struct dasd_device
*basedev
;
3112 struct tidaw
*last_tidaw
= NULL
;
3116 unsigned int seg_len
, part_len
, len_to_track_end
;
3117 unsigned char new_track
;
3118 sector_t recid
, trkid
;
3120 unsigned int count
, count_to_trk_end
;
3123 basedev
= block
->base
;
3124 if (rq_data_dir(req
) == READ
) {
3125 cmd
= DASD_ECKD_CCW_READ_TRACK_DATA
;
3126 itcw_op
= ITCW_OP_READ
;
3127 } else if (rq_data_dir(req
) == WRITE
) {
3128 cmd
= DASD_ECKD_CCW_WRITE_TRACK_DATA
;
3129 itcw_op
= ITCW_OP_WRITE
;
3131 return ERR_PTR(-EINVAL
);
3133 /* trackbased I/O needs address all memory via TIDAWs,
3134 * not just for 64 bit addresses. This allows us to map
3135 * each segment directly to one tidaw.
3136 * In the case of write requests, additional tidaws may
3137 * be needed when a segment crosses a track boundary.
3139 trkcount
= last_trk
- first_trk
+ 1;
3141 rq_for_each_segment(bv
, req
, iter
) {
3144 if (rq_data_dir(req
) == WRITE
)
3145 ctidaw
+= (last_trk
- first_trk
);
3147 /* Allocate the ccw request. */
3148 itcw_size
= itcw_calc_size(0, ctidaw
, 0);
3149 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 0, itcw_size
, startdev
);
3153 /* transfer length factor: how many bytes to read from the last track */
3154 if (first_trk
== last_trk
)
3155 tlf
= last_offs
- first_offs
+ 1;
3157 tlf
= last_offs
+ 1;
3160 itcw
= itcw_init(cqr
->data
, itcw_size
, itcw_op
, 0, ctidaw
, 0);
3165 cqr
->cpaddr
= itcw_get_tcw(itcw
);
3166 if (prepare_itcw(itcw
, first_trk
, last_trk
,
3167 cmd
, basedev
, startdev
,
3170 (last_rec
- first_rec
+ 1) * blksize
,
3171 tlf
, blk_per_trk
) == -EAGAIN
) {
3172 /* Clock not in sync and XRC is enabled.
3178 len_to_track_end
= 0;
3180 * A tidaw can address 4k of memory, but must not cross page boundaries
3181 * We can let the block layer handle this by setting
3182 * blk_queue_segment_boundary to page boundaries and
3183 * blk_max_segment_size to page size when setting up the request queue.
3184 * For write requests, a TIDAW must not cross track boundaries, because
3185 * we have to set the CBC flag on the last tidaw for each track.
3187 if (rq_data_dir(req
) == WRITE
) {
3190 rq_for_each_segment(bv
, req
, iter
) {
3191 dst
= page_address(bv
.bv_page
) + bv
.bv_offset
;
3192 seg_len
= bv
.bv_len
;
3196 offs
= sector_div(trkid
, blk_per_trk
);
3197 count_to_trk_end
= blk_per_trk
- offs
;
3198 count
= min((last_rec
- recid
+ 1),
3199 (sector_t
)count_to_trk_end
);
3200 len_to_track_end
= count
* blksize
;
3204 part_len
= min(seg_len
, len_to_track_end
);
3205 seg_len
-= part_len
;
3206 len_to_track_end
-= part_len
;
3207 /* We need to end the tidaw at track end */
3208 if (!len_to_track_end
) {
3210 tidaw_flags
= TIDAW_FLAGS_INSERT_CBC
;
3213 last_tidaw
= itcw_add_tidaw(itcw
, tidaw_flags
,
3215 if (IS_ERR(last_tidaw
)) {
3223 rq_for_each_segment(bv
, req
, iter
) {
3224 dst
= page_address(bv
.bv_page
) + bv
.bv_offset
;
3225 last_tidaw
= itcw_add_tidaw(itcw
, 0x00,
3227 if (IS_ERR(last_tidaw
)) {
3233 last_tidaw
->flags
|= TIDAW_FLAGS_LAST
;
3234 last_tidaw
->flags
&= ~TIDAW_FLAGS_INSERT_CBC
;
3235 itcw_finalize(itcw
);
3237 if (blk_noretry_request(req
) ||
3238 block
->base
->features
& DASD_FEATURE_FAILFAST
)
3239 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
3241 cqr
->startdev
= startdev
;
3242 cqr
->memdev
= startdev
;
3244 cqr
->expires
= startdev
->default_expires
* HZ
; /* default 5 minutes */
3245 cqr
->lpm
= startdev
->path_data
.ppm
;
3246 cqr
->retries
= startdev
->default_retries
;
3247 cqr
->buildclk
= get_tod_clock();
3248 cqr
->status
= DASD_CQR_FILLED
;
3251 dasd_sfree_request(cqr
, startdev
);
3252 return ERR_PTR(ret
);
3255 static struct dasd_ccw_req
*dasd_eckd_build_cp(struct dasd_device
*startdev
,
3256 struct dasd_block
*block
,
3257 struct request
*req
)
3262 struct dasd_eckd_private
*private;
3263 struct dasd_device
*basedev
;
3264 sector_t first_rec
, last_rec
;
3265 sector_t first_trk
, last_trk
;
3266 unsigned int first_offs
, last_offs
;
3267 unsigned int blk_per_trk
, blksize
;
3269 unsigned int data_size
;
3270 struct dasd_ccw_req
*cqr
;
3272 basedev
= block
->base
;
3273 private = basedev
->private;
3275 /* Calculate number of blocks/records per track. */
3276 blksize
= block
->bp_block
;
3277 blk_per_trk
= recs_per_track(&private->rdc_data
, 0, blksize
);
3278 if (blk_per_trk
== 0)
3279 return ERR_PTR(-EINVAL
);
3280 /* Calculate record id of first and last block. */
3281 first_rec
= first_trk
= blk_rq_pos(req
) >> block
->s2b_shift
;
3282 first_offs
= sector_div(first_trk
, blk_per_trk
);
3283 last_rec
= last_trk
=
3284 (blk_rq_pos(req
) + blk_rq_sectors(req
) - 1) >> block
->s2b_shift
;
3285 last_offs
= sector_div(last_trk
, blk_per_trk
);
3286 cdlspecial
= (private->uses_cdl
&& first_rec
< 2*blk_per_trk
);
3288 fcx_multitrack
= private->features
.feature
[40] & 0x20;
3289 data_size
= blk_rq_bytes(req
);
3290 if (data_size
% blksize
)
3291 return ERR_PTR(-EINVAL
);
3292 /* tpm write request add CBC data on each track boundary */
3293 if (rq_data_dir(req
) == WRITE
)
3294 data_size
+= (last_trk
- first_trk
) * 4;
3296 /* is read track data and write track data in command mode supported? */
3297 cmdrtd
= private->features
.feature
[9] & 0x20;
3298 cmdwtd
= private->features
.feature
[12] & 0x40;
3299 use_prefix
= private->features
.feature
[8] & 0x01;
3302 if (cdlspecial
|| dasd_page_cache
) {
3303 /* do nothing, just fall through to the cmd mode single case */
3304 } else if ((data_size
<= private->fcx_max_data
)
3305 && (fcx_multitrack
|| (first_trk
== last_trk
))) {
3306 cqr
= dasd_eckd_build_cp_tpm_track(startdev
, block
, req
,
3307 first_rec
, last_rec
,
3308 first_trk
, last_trk
,
3309 first_offs
, last_offs
,
3310 blk_per_trk
, blksize
);
3311 if (IS_ERR(cqr
) && (PTR_ERR(cqr
) != -EAGAIN
) &&
3312 (PTR_ERR(cqr
) != -ENOMEM
))
3314 } else if (use_prefix
&&
3315 (((rq_data_dir(req
) == READ
) && cmdrtd
) ||
3316 ((rq_data_dir(req
) == WRITE
) && cmdwtd
))) {
3317 cqr
= dasd_eckd_build_cp_cmd_track(startdev
, block
, req
,
3318 first_rec
, last_rec
,
3319 first_trk
, last_trk
,
3320 first_offs
, last_offs
,
3321 blk_per_trk
, blksize
);
3322 if (IS_ERR(cqr
) && (PTR_ERR(cqr
) != -EAGAIN
) &&
3323 (PTR_ERR(cqr
) != -ENOMEM
))
3327 cqr
= dasd_eckd_build_cp_cmd_single(startdev
, block
, req
,
3328 first_rec
, last_rec
,
3329 first_trk
, last_trk
,
3330 first_offs
, last_offs
,
3331 blk_per_trk
, blksize
);
3335 static struct dasd_ccw_req
*dasd_raw_build_cp(struct dasd_device
*startdev
,
3336 struct dasd_block
*block
,
3337 struct request
*req
)
3339 unsigned long *idaws
;
3340 struct dasd_device
*basedev
;
3341 struct dasd_ccw_req
*cqr
;
3343 struct req_iterator iter
;
3347 unsigned int trkcount
;
3348 unsigned int seg_len
, len_to_track_end
;
3349 unsigned int first_offs
;
3350 unsigned int cidaw
, cplength
, datasize
;
3351 sector_t first_trk
, last_trk
, sectors
;
3352 sector_t start_padding_sectors
, end_sector_offset
, end_padding_sectors
;
3353 unsigned int pfx_datasize
;
3356 * raw track access needs to be mutiple of 64k and on 64k boundary
3357 * For read requests we can fix an incorrect alignment by padding
3358 * the request with dummy pages.
3360 start_padding_sectors
= blk_rq_pos(req
) % DASD_RAW_SECTORS_PER_TRACK
;
3361 end_sector_offset
= (blk_rq_pos(req
) + blk_rq_sectors(req
)) %
3362 DASD_RAW_SECTORS_PER_TRACK
;
3363 end_padding_sectors
= (DASD_RAW_SECTORS_PER_TRACK
- end_sector_offset
) %
3364 DASD_RAW_SECTORS_PER_TRACK
;
3365 basedev
= block
->base
;
3366 if ((start_padding_sectors
|| end_padding_sectors
) &&
3367 (rq_data_dir(req
) == WRITE
)) {
3368 DBF_DEV_EVENT(DBF_ERR
, basedev
,
3369 "raw write not track aligned (%lu,%lu) req %p",
3370 start_padding_sectors
, end_padding_sectors
, req
);
3371 cqr
= ERR_PTR(-EINVAL
);
3375 first_trk
= blk_rq_pos(req
) / DASD_RAW_SECTORS_PER_TRACK
;
3376 last_trk
= (blk_rq_pos(req
) + blk_rq_sectors(req
) - 1) /
3377 DASD_RAW_SECTORS_PER_TRACK
;
3378 trkcount
= last_trk
- first_trk
+ 1;
3381 if (rq_data_dir(req
) == READ
)
3382 cmd
= DASD_ECKD_CCW_READ_TRACK
;
3383 else if (rq_data_dir(req
) == WRITE
)
3384 cmd
= DASD_ECKD_CCW_WRITE_FULL_TRACK
;
3386 cqr
= ERR_PTR(-EINVAL
);
3391 * Raw track based I/O needs IDAWs for each page,
3392 * and not just for 64 bit addresses.
3394 cidaw
= trkcount
* DASD_RAW_BLOCK_PER_TRACK
;
3396 /* 1x prefix + one read/write ccw per track */
3397 cplength
= 1 + trkcount
;
3400 * struct PFX_eckd_data has up to 2 byte as extended parameter
3401 * this is needed for write full track and has to be mentioned
3403 * add 8 instead of 2 to keep 8 byte boundary
3405 pfx_datasize
= sizeof(struct PFX_eckd_data
) + 8;
3407 datasize
= pfx_datasize
+ cidaw
* sizeof(unsigned long long);
3409 /* Allocate the ccw request. */
3410 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, cplength
,
3411 datasize
, startdev
);
3416 if (prefix_LRE(ccw
++, cqr
->data
, first_trk
, last_trk
, cmd
,
3417 basedev
, startdev
, 1 /* format */, first_offs
+ 1,
3418 trkcount
, 0, 0) == -EAGAIN
) {
3419 /* Clock not in sync and XRC is enabled.
3422 dasd_sfree_request(cqr
, startdev
);
3423 cqr
= ERR_PTR(-EAGAIN
);
3427 idaws
= (unsigned long *)(cqr
->data
+ pfx_datasize
);
3428 len_to_track_end
= 0;
3429 if (start_padding_sectors
) {
3430 ccw
[-1].flags
|= CCW_FLAG_CC
;
3431 ccw
->cmd_code
= cmd
;
3432 /* maximum 3390 track size */
3434 /* 64k map to one track */
3435 len_to_track_end
= 65536 - start_padding_sectors
* 512;
3436 ccw
->cda
= (__u32
)(addr_t
)idaws
;
3437 ccw
->flags
|= CCW_FLAG_IDA
;
3438 ccw
->flags
|= CCW_FLAG_SLI
;
3440 for (sectors
= 0; sectors
< start_padding_sectors
; sectors
+= 8)
3441 idaws
= idal_create_words(idaws
, rawpadpage
, PAGE_SIZE
);
3443 rq_for_each_segment(bv
, req
, iter
) {
3444 dst
= page_address(bv
.bv_page
) + bv
.bv_offset
;
3445 seg_len
= bv
.bv_len
;
3446 if (cmd
== DASD_ECKD_CCW_READ_TRACK
)
3447 memset(dst
, 0, seg_len
);
3448 if (!len_to_track_end
) {
3449 ccw
[-1].flags
|= CCW_FLAG_CC
;
3450 ccw
->cmd_code
= cmd
;
3451 /* maximum 3390 track size */
3453 /* 64k map to one track */
3454 len_to_track_end
= 65536;
3455 ccw
->cda
= (__u32
)(addr_t
)idaws
;
3456 ccw
->flags
|= CCW_FLAG_IDA
;
3457 ccw
->flags
|= CCW_FLAG_SLI
;
3460 len_to_track_end
-= seg_len
;
3461 idaws
= idal_create_words(idaws
, dst
, seg_len
);
3463 for (sectors
= 0; sectors
< end_padding_sectors
; sectors
+= 8)
3464 idaws
= idal_create_words(idaws
, rawpadpage
, PAGE_SIZE
);
3465 if (blk_noretry_request(req
) ||
3466 block
->base
->features
& DASD_FEATURE_FAILFAST
)
3467 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
3468 cqr
->startdev
= startdev
;
3469 cqr
->memdev
= startdev
;
3471 cqr
->expires
= startdev
->default_expires
* HZ
;
3472 cqr
->lpm
= startdev
->path_data
.ppm
;
3473 cqr
->retries
= startdev
->default_retries
;
3474 cqr
->buildclk
= get_tod_clock();
3475 cqr
->status
= DASD_CQR_FILLED
;
3477 if (IS_ERR(cqr
) && PTR_ERR(cqr
) != -EAGAIN
)
3485 dasd_eckd_free_cp(struct dasd_ccw_req
*cqr
, struct request
*req
)
3487 struct dasd_eckd_private
*private;
3489 struct req_iterator iter
;
3492 unsigned int blksize
, blk_per_trk
, off
;
3496 if (!dasd_page_cache
)
3498 private = cqr
->block
->base
->private;
3499 blksize
= cqr
->block
->bp_block
;
3500 blk_per_trk
= recs_per_track(&private->rdc_data
, 0, blksize
);
3501 recid
= blk_rq_pos(req
) >> cqr
->block
->s2b_shift
;
3503 /* Skip over define extent & locate record. */
3505 if (private->uses_cdl
== 0 || recid
> 2*blk_per_trk
)
3507 rq_for_each_segment(bv
, req
, iter
) {
3508 dst
= page_address(bv
.bv_page
) + bv
.bv_offset
;
3509 for (off
= 0; off
< bv
.bv_len
; off
+= blksize
) {
3510 /* Skip locate record. */
3511 if (private->uses_cdl
&& recid
<= 2*blk_per_trk
)
3514 if (ccw
->flags
& CCW_FLAG_IDA
)
3515 cda
= *((char **)((addr_t
) ccw
->cda
));
3517 cda
= (char *)((addr_t
) ccw
->cda
);
3519 if (rq_data_dir(req
) == READ
)
3520 memcpy(dst
, cda
, bv
.bv_len
);
3521 kmem_cache_free(dasd_page_cache
,
3522 (void *)((addr_t
)cda
& PAGE_MASK
));
3531 status
= cqr
->status
== DASD_CQR_DONE
;
3532 dasd_sfree_request(cqr
, cqr
->memdev
);
3537 * Modify ccw/tcw in cqr so it can be started on a base device.
3539 * Note that this is not enough to restart the cqr!
3540 * Either reset cqr->startdev as well (summary unit check handling)
3541 * or restart via separate cqr (as in ERP handling).
3543 void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req
*cqr
)
3546 struct PFX_eckd_data
*pfxdata
;
3551 if (cqr
->cpmode
== 1) {
3553 tccb
= tcw_get_tccb(tcw
);
3554 dcw
= (struct dcw
*)&tccb
->tca
[0];
3555 pfxdata
= (struct PFX_eckd_data
*)&dcw
->cd
[0];
3556 pfxdata
->validity
.verify_base
= 0;
3557 pfxdata
->validity
.hyper_pav
= 0;
3560 pfxdata
= cqr
->data
;
3561 if (ccw
->cmd_code
== DASD_ECKD_CCW_PFX
) {
3562 pfxdata
->validity
.verify_base
= 0;
3563 pfxdata
->validity
.hyper_pav
= 0;
3568 #define DASD_ECKD_CHANQ_MAX_SIZE 4
3570 static struct dasd_ccw_req
*dasd_eckd_build_alias_cp(struct dasd_device
*base
,
3571 struct dasd_block
*block
,
3572 struct request
*req
)
3574 struct dasd_eckd_private
*private;
3575 struct dasd_device
*startdev
;
3576 unsigned long flags
;
3577 struct dasd_ccw_req
*cqr
;
3579 startdev
= dasd_alias_get_start_dev(base
);
3582 private = startdev
->private;
3583 if (private->count
>= DASD_ECKD_CHANQ_MAX_SIZE
)
3584 return ERR_PTR(-EBUSY
);
3586 spin_lock_irqsave(get_ccwdev_lock(startdev
->cdev
), flags
);
3588 if ((base
->features
& DASD_FEATURE_USERAW
))
3589 cqr
= dasd_raw_build_cp(startdev
, block
, req
);
3591 cqr
= dasd_eckd_build_cp(startdev
, block
, req
);
3594 spin_unlock_irqrestore(get_ccwdev_lock(startdev
->cdev
), flags
);
3598 static int dasd_eckd_free_alias_cp(struct dasd_ccw_req
*cqr
,
3599 struct request
*req
)
3601 struct dasd_eckd_private
*private;
3602 unsigned long flags
;
3604 spin_lock_irqsave(get_ccwdev_lock(cqr
->memdev
->cdev
), flags
);
3605 private = cqr
->memdev
->private;
3607 spin_unlock_irqrestore(get_ccwdev_lock(cqr
->memdev
->cdev
), flags
);
3608 return dasd_eckd_free_cp(cqr
, req
);
3612 dasd_eckd_fill_info(struct dasd_device
* device
,
3613 struct dasd_information2_t
* info
)
3615 struct dasd_eckd_private
*private = device
->private;
3617 info
->label_block
= 2;
3618 info
->FBA_layout
= private->uses_cdl
? 0 : 1;
3619 info
->format
= private->uses_cdl
? DASD_FORMAT_CDL
: DASD_FORMAT_LDL
;
3620 info
->characteristics_size
= sizeof(private->rdc_data
);
3621 memcpy(info
->characteristics
, &private->rdc_data
,
3622 sizeof(private->rdc_data
));
3623 info
->confdata_size
= min((unsigned long)private->conf_len
,
3624 sizeof(info
->configuration_data
));
3625 memcpy(info
->configuration_data
, private->conf_data
,
3626 info
->confdata_size
);
3631 * SECTION: ioctl functions for eckd devices.
3635 * Release device ioctl.
3636 * Buils a channel programm to releases a prior reserved
3637 * (see dasd_eckd_reserve) device.
3640 dasd_eckd_release(struct dasd_device
*device
)
3642 struct dasd_ccw_req
*cqr
;
3647 if (!capable(CAP_SYS_ADMIN
))
3651 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1, 32, device
);
3653 mutex_lock(&dasd_reserve_mutex
);
3655 cqr
= &dasd_reserve_req
->cqr
;
3656 memset(cqr
, 0, sizeof(*cqr
));
3657 memset(&dasd_reserve_req
->ccw
, 0,
3658 sizeof(dasd_reserve_req
->ccw
));
3659 cqr
->cpaddr
= &dasd_reserve_req
->ccw
;
3660 cqr
->data
= &dasd_reserve_req
->data
;
3661 cqr
->magic
= DASD_ECKD_MAGIC
;
3664 ccw
->cmd_code
= DASD_ECKD_CCW_RELEASE
;
3665 ccw
->flags
|= CCW_FLAG_SLI
;
3667 ccw
->cda
= (__u32
)(addr_t
) cqr
->data
;
3668 cqr
->startdev
= device
;
3669 cqr
->memdev
= device
;
3670 clear_bit(DASD_CQR_FLAGS_USE_ERP
, &cqr
->flags
);
3671 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
3672 cqr
->retries
= 2; /* set retry counter to enable basic ERP */
3673 cqr
->expires
= 2 * HZ
;
3674 cqr
->buildclk
= get_tod_clock();
3675 cqr
->status
= DASD_CQR_FILLED
;
3677 rc
= dasd_sleep_on_immediatly(cqr
);
3679 clear_bit(DASD_FLAG_IS_RESERVED
, &device
->flags
);
3682 mutex_unlock(&dasd_reserve_mutex
);
3684 dasd_sfree_request(cqr
, cqr
->memdev
);
3689 * Reserve device ioctl.
3690 * Options are set to 'synchronous wait for interrupt' and
3691 * 'timeout the request'. This leads to a terminate IO if
3692 * the interrupt is outstanding for a certain time.
3695 dasd_eckd_reserve(struct dasd_device
*device
)
3697 struct dasd_ccw_req
*cqr
;
3702 if (!capable(CAP_SYS_ADMIN
))
3706 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1, 32, device
);
3708 mutex_lock(&dasd_reserve_mutex
);
3710 cqr
= &dasd_reserve_req
->cqr
;
3711 memset(cqr
, 0, sizeof(*cqr
));
3712 memset(&dasd_reserve_req
->ccw
, 0,
3713 sizeof(dasd_reserve_req
->ccw
));
3714 cqr
->cpaddr
= &dasd_reserve_req
->ccw
;
3715 cqr
->data
= &dasd_reserve_req
->data
;
3716 cqr
->magic
= DASD_ECKD_MAGIC
;
3719 ccw
->cmd_code
= DASD_ECKD_CCW_RESERVE
;
3720 ccw
->flags
|= CCW_FLAG_SLI
;
3722 ccw
->cda
= (__u32
)(addr_t
) cqr
->data
;
3723 cqr
->startdev
= device
;
3724 cqr
->memdev
= device
;
3725 clear_bit(DASD_CQR_FLAGS_USE_ERP
, &cqr
->flags
);
3726 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
3727 cqr
->retries
= 2; /* set retry counter to enable basic ERP */
3728 cqr
->expires
= 2 * HZ
;
3729 cqr
->buildclk
= get_tod_clock();
3730 cqr
->status
= DASD_CQR_FILLED
;
3732 rc
= dasd_sleep_on_immediatly(cqr
);
3734 set_bit(DASD_FLAG_IS_RESERVED
, &device
->flags
);
3737 mutex_unlock(&dasd_reserve_mutex
);
3739 dasd_sfree_request(cqr
, cqr
->memdev
);
3744 * Steal lock ioctl - unconditional reserve device.
3745 * Buils a channel programm to break a device's reservation.
3746 * (unconditional reserve)
3749 dasd_eckd_steal_lock(struct dasd_device
*device
)
3751 struct dasd_ccw_req
*cqr
;
3756 if (!capable(CAP_SYS_ADMIN
))
3760 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1, 32, device
);
3762 mutex_lock(&dasd_reserve_mutex
);
3764 cqr
= &dasd_reserve_req
->cqr
;
3765 memset(cqr
, 0, sizeof(*cqr
));
3766 memset(&dasd_reserve_req
->ccw
, 0,
3767 sizeof(dasd_reserve_req
->ccw
));
3768 cqr
->cpaddr
= &dasd_reserve_req
->ccw
;
3769 cqr
->data
= &dasd_reserve_req
->data
;
3770 cqr
->magic
= DASD_ECKD_MAGIC
;
3773 ccw
->cmd_code
= DASD_ECKD_CCW_SLCK
;
3774 ccw
->flags
|= CCW_FLAG_SLI
;
3776 ccw
->cda
= (__u32
)(addr_t
) cqr
->data
;
3777 cqr
->startdev
= device
;
3778 cqr
->memdev
= device
;
3779 clear_bit(DASD_CQR_FLAGS_USE_ERP
, &cqr
->flags
);
3780 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
3781 cqr
->retries
= 2; /* set retry counter to enable basic ERP */
3782 cqr
->expires
= 2 * HZ
;
3783 cqr
->buildclk
= get_tod_clock();
3784 cqr
->status
= DASD_CQR_FILLED
;
3786 rc
= dasd_sleep_on_immediatly(cqr
);
3788 set_bit(DASD_FLAG_IS_RESERVED
, &device
->flags
);
3791 mutex_unlock(&dasd_reserve_mutex
);
3793 dasd_sfree_request(cqr
, cqr
->memdev
);
3798 * SNID - Sense Path Group ID
3799 * This ioctl may be used in situations where I/O is stalled due to
3800 * a reserve, so if the normal dasd_smalloc_request fails, we use the
3801 * preallocated dasd_reserve_req.
3803 static int dasd_eckd_snid(struct dasd_device
*device
,
3806 struct dasd_ccw_req
*cqr
;
3810 struct dasd_snid_ioctl_data usrparm
;
3812 if (!capable(CAP_SYS_ADMIN
))
3815 if (copy_from_user(&usrparm
, argp
, sizeof(usrparm
)))
3819 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1,
3820 sizeof(struct dasd_snid_data
), device
);
3822 mutex_lock(&dasd_reserve_mutex
);
3824 cqr
= &dasd_reserve_req
->cqr
;
3825 memset(cqr
, 0, sizeof(*cqr
));
3826 memset(&dasd_reserve_req
->ccw
, 0,
3827 sizeof(dasd_reserve_req
->ccw
));
3828 cqr
->cpaddr
= &dasd_reserve_req
->ccw
;
3829 cqr
->data
= &dasd_reserve_req
->data
;
3830 cqr
->magic
= DASD_ECKD_MAGIC
;
3833 ccw
->cmd_code
= DASD_ECKD_CCW_SNID
;
3834 ccw
->flags
|= CCW_FLAG_SLI
;
3836 ccw
->cda
= (__u32
)(addr_t
) cqr
->data
;
3837 cqr
->startdev
= device
;
3838 cqr
->memdev
= device
;
3839 clear_bit(DASD_CQR_FLAGS_USE_ERP
, &cqr
->flags
);
3840 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
3841 set_bit(DASD_CQR_ALLOW_SLOCK
, &cqr
->flags
);
3843 cqr
->expires
= 10 * HZ
;
3844 cqr
->buildclk
= get_tod_clock();
3845 cqr
->status
= DASD_CQR_FILLED
;
3846 cqr
->lpm
= usrparm
.path_mask
;
3848 rc
= dasd_sleep_on_immediatly(cqr
);
3849 /* verify that I/O processing didn't modify the path mask */
3850 if (!rc
&& usrparm
.path_mask
&& (cqr
->lpm
!= usrparm
.path_mask
))
3853 usrparm
.data
= *((struct dasd_snid_data
*)cqr
->data
);
3854 if (copy_to_user(argp
, &usrparm
, sizeof(usrparm
)))
3859 mutex_unlock(&dasd_reserve_mutex
);
3861 dasd_sfree_request(cqr
, cqr
->memdev
);
3866 * Read performance statistics
3869 dasd_eckd_performance(struct dasd_device
*device
, void __user
*argp
)
3871 struct dasd_psf_prssd_data
*prssdp
;
3872 struct dasd_rssd_perf_stats_t
*stats
;
3873 struct dasd_ccw_req
*cqr
;
3877 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1 /* PSF */ + 1 /* RSSD */,
3878 (sizeof(struct dasd_psf_prssd_data
) +
3879 sizeof(struct dasd_rssd_perf_stats_t
)),
3882 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
3883 "Could not allocate initialization request");
3884 return PTR_ERR(cqr
);
3886 cqr
->startdev
= device
;
3887 cqr
->memdev
= device
;
3889 clear_bit(DASD_CQR_FLAGS_USE_ERP
, &cqr
->flags
);
3890 cqr
->expires
= 10 * HZ
;
3892 /* Prepare for Read Subsystem Data */
3893 prssdp
= (struct dasd_psf_prssd_data
*) cqr
->data
;
3894 memset(prssdp
, 0, sizeof(struct dasd_psf_prssd_data
));
3895 prssdp
->order
= PSF_ORDER_PRSSD
;
3896 prssdp
->suborder
= 0x01; /* Performance Statistics */
3897 prssdp
->varies
[1] = 0x01; /* Perf Statistics for the Subsystem */
3900 ccw
->cmd_code
= DASD_ECKD_CCW_PSF
;
3901 ccw
->count
= sizeof(struct dasd_psf_prssd_data
);
3902 ccw
->flags
|= CCW_FLAG_CC
;
3903 ccw
->cda
= (__u32
)(addr_t
) prssdp
;
3905 /* Read Subsystem Data - Performance Statistics */
3906 stats
= (struct dasd_rssd_perf_stats_t
*) (prssdp
+ 1);
3907 memset(stats
, 0, sizeof(struct dasd_rssd_perf_stats_t
));
3910 ccw
->cmd_code
= DASD_ECKD_CCW_RSSD
;
3911 ccw
->count
= sizeof(struct dasd_rssd_perf_stats_t
);
3912 ccw
->cda
= (__u32
)(addr_t
) stats
;
3914 cqr
->buildclk
= get_tod_clock();
3915 cqr
->status
= DASD_CQR_FILLED
;
3916 rc
= dasd_sleep_on(cqr
);
3918 prssdp
= (struct dasd_psf_prssd_data
*) cqr
->data
;
3919 stats
= (struct dasd_rssd_perf_stats_t
*) (prssdp
+ 1);
3920 if (copy_to_user(argp
, stats
,
3921 sizeof(struct dasd_rssd_perf_stats_t
)))
3924 dasd_sfree_request(cqr
, cqr
->memdev
);
3929 * Get attributes (cache operations)
3930 * Returnes the cache attributes used in Define Extend (DE).
3933 dasd_eckd_get_attrib(struct dasd_device
*device
, void __user
*argp
)
3935 struct dasd_eckd_private
*private = device
->private;
3936 struct attrib_data_t attrib
= private->attrib
;
3939 if (!capable(CAP_SYS_ADMIN
))
3945 if (copy_to_user(argp
, (long *) &attrib
,
3946 sizeof(struct attrib_data_t
)))
3953 * Set attributes (cache operations)
3954 * Stores the attributes for cache operation to be used in Define Extend (DE).
3957 dasd_eckd_set_attrib(struct dasd_device
*device
, void __user
*argp
)
3959 struct dasd_eckd_private
*private = device
->private;
3960 struct attrib_data_t attrib
;
3962 if (!capable(CAP_SYS_ADMIN
))
3967 if (copy_from_user(&attrib
, argp
, sizeof(struct attrib_data_t
)))
3969 private->attrib
= attrib
;
3971 dev_info(&device
->cdev
->dev
,
3972 "The DASD cache mode was set to %x (%i cylinder prestage)\n",
3973 private->attrib
.operation
, private->attrib
.nr_cyl
);
3978 * Issue syscall I/O to EMC Symmetrix array.
3979 * CCWs are PSF and RSSD
3981 static int dasd_symm_io(struct dasd_device
*device
, void __user
*argp
)
3983 struct dasd_symmio_parms usrparm
;
3984 char *psf_data
, *rssd_result
;
3985 struct dasd_ccw_req
*cqr
;
3990 if (!capable(CAP_SYS_ADMIN
) && !capable(CAP_SYS_RAWIO
))
3994 /* Copy parms from caller */
3996 if (copy_from_user(&usrparm
, argp
, sizeof(usrparm
)))
3998 if (is_compat_task()) {
3999 /* Make sure pointers are sane even on 31 bit. */
4001 if ((usrparm
.psf_data
>> 32) != 0)
4003 if ((usrparm
.rssd_result
>> 32) != 0)
4005 usrparm
.psf_data
&= 0x7fffffffULL
;
4006 usrparm
.rssd_result
&= 0x7fffffffULL
;
4008 /* alloc I/O data area */
4009 psf_data
= kzalloc(usrparm
.psf_data_len
, GFP_KERNEL
| GFP_DMA
);
4010 rssd_result
= kzalloc(usrparm
.rssd_result_len
, GFP_KERNEL
| GFP_DMA
);
4011 if (!psf_data
|| !rssd_result
) {
4016 /* get syscall header from user space */
4018 if (copy_from_user(psf_data
,
4019 (void __user
*)(unsigned long) usrparm
.psf_data
,
4020 usrparm
.psf_data_len
))
4025 /* setup CCWs for PSF + RSSD */
4026 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 2 , 0, device
);
4028 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
4029 "Could not allocate initialization request");
4034 cqr
->startdev
= device
;
4035 cqr
->memdev
= device
;
4037 cqr
->expires
= 10 * HZ
;
4038 cqr
->buildclk
= get_tod_clock();
4039 cqr
->status
= DASD_CQR_FILLED
;
4041 /* Build the ccws */
4045 ccw
->cmd_code
= DASD_ECKD_CCW_PSF
;
4046 ccw
->count
= usrparm
.psf_data_len
;
4047 ccw
->flags
|= CCW_FLAG_CC
;
4048 ccw
->cda
= (__u32
)(addr_t
) psf_data
;
4053 ccw
->cmd_code
= DASD_ECKD_CCW_RSSD
;
4054 ccw
->count
= usrparm
.rssd_result_len
;
4055 ccw
->flags
= CCW_FLAG_SLI
;
4056 ccw
->cda
= (__u32
)(addr_t
) rssd_result
;
4058 rc
= dasd_sleep_on(cqr
);
4063 if (copy_to_user((void __user
*)(unsigned long) usrparm
.rssd_result
,
4064 rssd_result
, usrparm
.rssd_result_len
))
4069 dasd_sfree_request(cqr
, cqr
->memdev
);
4074 DBF_DEV_EVENT(DBF_WARNING
, device
,
4075 "Symmetrix ioctl (0x%02x 0x%02x): rc=%d",
4076 (int) psf0
, (int) psf1
, rc
);
4081 dasd_eckd_ioctl(struct dasd_block
*block
, unsigned int cmd
, void __user
*argp
)
4083 struct dasd_device
*device
= block
->base
;
4087 return dasd_eckd_get_attrib(device
, argp
);
4089 return dasd_eckd_set_attrib(device
, argp
);
4091 return dasd_eckd_performance(device
, argp
);
4093 return dasd_eckd_release(device
);
4095 return dasd_eckd_reserve(device
);
4097 return dasd_eckd_steal_lock(device
);
4099 return dasd_eckd_snid(device
, argp
);
4101 return dasd_symm_io(device
, argp
);
4108 * Dump the range of CCWs into 'page' buffer
4109 * and return number of printed chars.
4112 dasd_eckd_dump_ccw_range(struct ccw1
*from
, struct ccw1
*to
, char *page
)
4118 while (from
<= to
) {
4119 len
+= sprintf(page
+ len
, PRINTK_HEADER
4120 " CCW %p: %08X %08X DAT:",
4121 from
, ((int *) from
)[0], ((int *) from
)[1]);
4123 /* get pointer to data (consider IDALs) */
4124 if (from
->flags
& CCW_FLAG_IDA
)
4125 datap
= (char *) *((addr_t
*) (addr_t
) from
->cda
);
4127 datap
= (char *) ((addr_t
) from
->cda
);
4129 /* dump data (max 32 bytes) */
4130 for (count
= 0; count
< from
->count
&& count
< 32; count
++) {
4131 if (count
% 8 == 0) len
+= sprintf(page
+ len
, " ");
4132 if (count
% 4 == 0) len
+= sprintf(page
+ len
, " ");
4133 len
+= sprintf(page
+ len
, "%02x", datap
[count
]);
4135 len
+= sprintf(page
+ len
, "\n");
4142 dasd_eckd_dump_sense_dbf(struct dasd_device
*device
, struct irb
*irb
,
4148 sense
= (u64
*) dasd_get_sense(irb
);
4149 stat
= (u64
*) &irb
->scsw
;
4151 DBF_DEV_EVENT(DBF_EMERG
, device
, "%s: %016llx %08x : "
4152 "%016llx %016llx %016llx %016llx",
4153 reason
, *stat
, *((u32
*) (stat
+ 1)),
4154 sense
[0], sense
[1], sense
[2], sense
[3]);
4156 DBF_DEV_EVENT(DBF_EMERG
, device
, "%s: %016llx %08x : %s",
4157 reason
, *stat
, *((u32
*) (stat
+ 1)),
4163 * Print sense data and related channel program.
4164 * Parts are printed because printk buffer is only 1024 bytes.
4166 static void dasd_eckd_dump_sense_ccw(struct dasd_device
*device
,
4167 struct dasd_ccw_req
*req
, struct irb
*irb
)
4170 struct ccw1
*first
, *last
, *fail
, *from
, *to
;
4173 page
= (char *) get_zeroed_page(GFP_ATOMIC
);
4175 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
4176 "No memory to dump sense data\n");
4179 /* dump the sense data */
4180 len
= sprintf(page
, PRINTK_HEADER
4181 " I/O status report for device %s:\n",
4182 dev_name(&device
->cdev
->dev
));
4183 len
+= sprintf(page
+ len
, PRINTK_HEADER
4184 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X "
4186 req
, scsw_cc(&irb
->scsw
), scsw_fctl(&irb
->scsw
),
4187 scsw_actl(&irb
->scsw
), scsw_stctl(&irb
->scsw
),
4188 scsw_dstat(&irb
->scsw
), scsw_cstat(&irb
->scsw
),
4189 req
? req
->intrc
: 0);
4190 len
+= sprintf(page
+ len
, PRINTK_HEADER
4191 " device %s: Failing CCW: %p\n",
4192 dev_name(&device
->cdev
->dev
),
4193 (void *) (addr_t
) irb
->scsw
.cmd
.cpa
);
4194 if (irb
->esw
.esw0
.erw
.cons
) {
4195 for (sl
= 0; sl
< 4; sl
++) {
4196 len
+= sprintf(page
+ len
, PRINTK_HEADER
4197 " Sense(hex) %2d-%2d:",
4198 (8 * sl
), ((8 * sl
) + 7));
4200 for (sct
= 0; sct
< 8; sct
++) {
4201 len
+= sprintf(page
+ len
, " %02x",
4202 irb
->ecw
[8 * sl
+ sct
]);
4204 len
+= sprintf(page
+ len
, "\n");
4207 if (irb
->ecw
[27] & DASD_SENSE_BIT_0
) {
4208 /* 24 Byte Sense Data */
4209 sprintf(page
+ len
, PRINTK_HEADER
4210 " 24 Byte: %x MSG %x, "
4211 "%s MSGb to SYSOP\n",
4212 irb
->ecw
[7] >> 4, irb
->ecw
[7] & 0x0f,
4213 irb
->ecw
[1] & 0x10 ? "" : "no");
4215 /* 32 Byte Sense Data */
4216 sprintf(page
+ len
, PRINTK_HEADER
4217 " 32 Byte: Format: %x "
4218 "Exception class %x\n",
4219 irb
->ecw
[6] & 0x0f, irb
->ecw
[22] >> 4);
4222 sprintf(page
+ len
, PRINTK_HEADER
4223 " SORRY - NO VALID SENSE AVAILABLE\n");
4225 printk(KERN_ERR
"%s", page
);
4228 /* req == NULL for unsolicited interrupts */
4229 /* dump the Channel Program (max 140 Bytes per line) */
4230 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */
4231 first
= req
->cpaddr
;
4232 for (last
= first
; last
->flags
& (CCW_FLAG_CC
| CCW_FLAG_DC
); last
++);
4233 to
= min(first
+ 6, last
);
4234 len
= sprintf(page
, PRINTK_HEADER
4235 " Related CP in req: %p\n", req
);
4236 dasd_eckd_dump_ccw_range(first
, to
, page
+ len
);
4237 printk(KERN_ERR
"%s", page
);
4239 /* print failing CCW area (maximum 4) */
4240 /* scsw->cda is either valid or zero */
4243 fail
= (struct ccw1
*)(addr_t
)
4244 irb
->scsw
.cmd
.cpa
; /* failing CCW */
4245 if (from
< fail
- 2) {
4246 from
= fail
- 2; /* there is a gap - print header */
4247 len
+= sprintf(page
, PRINTK_HEADER
"......\n");
4249 to
= min(fail
+ 1, last
);
4250 len
+= dasd_eckd_dump_ccw_range(from
, to
, page
+ len
);
4252 /* print last CCWs (maximum 2) */
4253 from
= max(from
, ++to
);
4254 if (from
< last
- 1) {
4255 from
= last
- 1; /* there is a gap - print header */
4256 len
+= sprintf(page
+ len
, PRINTK_HEADER
"......\n");
4258 len
+= dasd_eckd_dump_ccw_range(from
, last
, page
+ len
);
4260 printk(KERN_ERR
"%s", page
);
4262 free_page((unsigned long) page
);
4267 * Print sense data from a tcw.
4269 static void dasd_eckd_dump_sense_tcw(struct dasd_device
*device
,
4270 struct dasd_ccw_req
*req
, struct irb
*irb
)
4273 int len
, sl
, sct
, residual
;
4277 page
= (char *) get_zeroed_page(GFP_ATOMIC
);
4279 DBF_DEV_EVENT(DBF_WARNING
, device
, " %s",
4280 "No memory to dump sense data");
4283 /* dump the sense data */
4284 len
= sprintf(page
, PRINTK_HEADER
4285 " I/O status report for device %s:\n",
4286 dev_name(&device
->cdev
->dev
));
4287 len
+= sprintf(page
+ len
, PRINTK_HEADER
4288 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X "
4289 "CS:%02X fcxs:%02X schxs:%02X RC:%d\n",
4290 req
, scsw_cc(&irb
->scsw
), scsw_fctl(&irb
->scsw
),
4291 scsw_actl(&irb
->scsw
), scsw_stctl(&irb
->scsw
),
4292 scsw_dstat(&irb
->scsw
), scsw_cstat(&irb
->scsw
),
4293 irb
->scsw
.tm
.fcxs
, irb
->scsw
.tm
.schxs
,
4294 req
? req
->intrc
: 0);
4295 len
+= sprintf(page
+ len
, PRINTK_HEADER
4296 " device %s: Failing TCW: %p\n",
4297 dev_name(&device
->cdev
->dev
),
4298 (void *) (addr_t
) irb
->scsw
.tm
.tcw
);
4302 if (irb
->scsw
.tm
.tcw
&& (irb
->scsw
.tm
.fcxs
& 0x01))
4304 (struct tcw
*)(unsigned long)irb
->scsw
.tm
.tcw
);
4307 len
+= sprintf(page
+ len
, PRINTK_HEADER
4308 " tsb->length %d\n", tsb
->length
);
4309 len
+= sprintf(page
+ len
, PRINTK_HEADER
4310 " tsb->flags %x\n", tsb
->flags
);
4311 len
+= sprintf(page
+ len
, PRINTK_HEADER
4312 " tsb->dcw_offset %d\n", tsb
->dcw_offset
);
4313 len
+= sprintf(page
+ len
, PRINTK_HEADER
4314 " tsb->count %d\n", tsb
->count
);
4315 residual
= tsb
->count
- 28;
4316 len
+= sprintf(page
+ len
, PRINTK_HEADER
4317 " residual %d\n", residual
);
4319 switch (tsb
->flags
& 0x07) {
4320 case 1: /* tsa_iostat */
4321 len
+= sprintf(page
+ len
, PRINTK_HEADER
4322 " tsb->tsa.iostat.dev_time %d\n",
4323 tsb
->tsa
.iostat
.dev_time
);
4324 len
+= sprintf(page
+ len
, PRINTK_HEADER
4325 " tsb->tsa.iostat.def_time %d\n",
4326 tsb
->tsa
.iostat
.def_time
);
4327 len
+= sprintf(page
+ len
, PRINTK_HEADER
4328 " tsb->tsa.iostat.queue_time %d\n",
4329 tsb
->tsa
.iostat
.queue_time
);
4330 len
+= sprintf(page
+ len
, PRINTK_HEADER
4331 " tsb->tsa.iostat.dev_busy_time %d\n",
4332 tsb
->tsa
.iostat
.dev_busy_time
);
4333 len
+= sprintf(page
+ len
, PRINTK_HEADER
4334 " tsb->tsa.iostat.dev_act_time %d\n",
4335 tsb
->tsa
.iostat
.dev_act_time
);
4336 sense
= tsb
->tsa
.iostat
.sense
;
4338 case 2: /* ts_ddpc */
4339 len
+= sprintf(page
+ len
, PRINTK_HEADER
4340 " tsb->tsa.ddpc.rc %d\n", tsb
->tsa
.ddpc
.rc
);
4341 for (sl
= 0; sl
< 2; sl
++) {
4342 len
+= sprintf(page
+ len
, PRINTK_HEADER
4343 " tsb->tsa.ddpc.rcq %2d-%2d: ",
4344 (8 * sl
), ((8 * sl
) + 7));
4345 rcq
= tsb
->tsa
.ddpc
.rcq
;
4346 for (sct
= 0; sct
< 8; sct
++) {
4347 len
+= sprintf(page
+ len
, " %02x",
4350 len
+= sprintf(page
+ len
, "\n");
4352 sense
= tsb
->tsa
.ddpc
.sense
;
4354 case 3: /* tsa_intrg */
4355 len
+= sprintf(page
+ len
, PRINTK_HEADER
4356 " tsb->tsa.intrg.: not supportet yet\n");
4361 for (sl
= 0; sl
< 4; sl
++) {
4362 len
+= sprintf(page
+ len
, PRINTK_HEADER
4363 " Sense(hex) %2d-%2d:",
4364 (8 * sl
), ((8 * sl
) + 7));
4365 for (sct
= 0; sct
< 8; sct
++) {
4366 len
+= sprintf(page
+ len
, " %02x",
4367 sense
[8 * sl
+ sct
]);
4369 len
+= sprintf(page
+ len
, "\n");
4372 if (sense
[27] & DASD_SENSE_BIT_0
) {
4373 /* 24 Byte Sense Data */
4374 sprintf(page
+ len
, PRINTK_HEADER
4375 " 24 Byte: %x MSG %x, "
4376 "%s MSGb to SYSOP\n",
4377 sense
[7] >> 4, sense
[7] & 0x0f,
4378 sense
[1] & 0x10 ? "" : "no");
4380 /* 32 Byte Sense Data */
4381 sprintf(page
+ len
, PRINTK_HEADER
4382 " 32 Byte: Format: %x "
4383 "Exception class %x\n",
4384 sense
[6] & 0x0f, sense
[22] >> 4);
4387 sprintf(page
+ len
, PRINTK_HEADER
4388 " SORRY - NO VALID SENSE AVAILABLE\n");
4391 sprintf(page
+ len
, PRINTK_HEADER
4392 " SORRY - NO TSB DATA AVAILABLE\n");
4394 printk(KERN_ERR
"%s", page
);
4395 free_page((unsigned long) page
);
4398 static void dasd_eckd_dump_sense(struct dasd_device
*device
,
4399 struct dasd_ccw_req
*req
, struct irb
*irb
)
4401 if (scsw_is_tm(&irb
->scsw
))
4402 dasd_eckd_dump_sense_tcw(device
, req
, irb
);
4404 dasd_eckd_dump_sense_ccw(device
, req
, irb
);
4407 static int dasd_eckd_pm_freeze(struct dasd_device
*device
)
4410 * the device should be disconnected from our LCU structure
4411 * on restore we will reconnect it and reread LCU specific
4412 * information like PAV support that might have changed
4414 dasd_alias_remove_device(device
);
4415 dasd_alias_disconnect_device_from_lcu(device
);
4420 static int dasd_eckd_restore_device(struct dasd_device
*device
)
4422 struct dasd_eckd_private
*private = device
->private;
4423 struct dasd_eckd_characteristics temp_rdc_data
;
4425 struct dasd_uid temp_uid
;
4426 unsigned long flags
;
4427 unsigned long cqr_flags
= 0;
4429 /* Read Configuration Data */
4430 rc
= dasd_eckd_read_conf(device
);
4432 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
,
4433 "Read configuration data failed, rc=%d", rc
);
4437 dasd_eckd_get_uid(device
, &temp_uid
);
4438 /* Generate device unique id */
4439 rc
= dasd_eckd_generate_uid(device
);
4440 spin_lock_irqsave(get_ccwdev_lock(device
->cdev
), flags
);
4441 if (memcmp(&private->uid
, &temp_uid
, sizeof(struct dasd_uid
)) != 0)
4442 dev_err(&device
->cdev
->dev
, "The UID of the DASD has "
4444 spin_unlock_irqrestore(get_ccwdev_lock(device
->cdev
), flags
);
4448 /* register lcu with alias handling, enable PAV if this is a new lcu */
4449 rc
= dasd_alias_make_device_known_to_lcu(device
);
4453 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr_flags
);
4454 dasd_eckd_validate_server(device
, cqr_flags
);
4456 /* RE-Read Configuration Data */
4457 rc
= dasd_eckd_read_conf(device
);
4459 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
,
4460 "Read configuration data failed, rc=%d", rc
);
4464 /* Read Feature Codes */
4465 dasd_eckd_read_features(device
);
4467 /* Read Device Characteristics */
4468 rc
= dasd_generic_read_dev_chars(device
, DASD_ECKD_MAGIC
,
4469 &temp_rdc_data
, 64);
4471 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
,
4472 "Read device characteristic failed, rc=%d", rc
);
4475 spin_lock_irqsave(get_ccwdev_lock(device
->cdev
), flags
);
4476 memcpy(&private->rdc_data
, &temp_rdc_data
, sizeof(temp_rdc_data
));
4477 spin_unlock_irqrestore(get_ccwdev_lock(device
->cdev
), flags
);
4479 /* add device to alias management */
4480 dasd_alias_add_device(device
);
4485 dasd_alias_disconnect_device_from_lcu(device
);
4490 static int dasd_eckd_reload_device(struct dasd_device
*device
)
4492 struct dasd_eckd_private
*private = device
->private;
4495 struct dasd_uid uid
;
4496 unsigned long flags
;
4498 spin_lock_irqsave(get_ccwdev_lock(device
->cdev
), flags
);
4499 old_base
= private->uid
.base_unit_addr
;
4500 spin_unlock_irqrestore(get_ccwdev_lock(device
->cdev
), flags
);
4502 /* Read Configuration Data */
4503 rc
= dasd_eckd_read_conf(device
);
4507 rc
= dasd_eckd_generate_uid(device
);
4511 * update unit address configuration and
4512 * add device to alias management
4514 dasd_alias_update_add_device(device
);
4516 dasd_eckd_get_uid(device
, &uid
);
4518 if (old_base
!= uid
.base_unit_addr
) {
4519 if (strlen(uid
.vduit
) > 0)
4520 snprintf(print_uid
, sizeof(print_uid
),
4521 "%s.%s.%04x.%02x.%s", uid
.vendor
, uid
.serial
,
4522 uid
.ssid
, uid
.base_unit_addr
, uid
.vduit
);
4524 snprintf(print_uid
, sizeof(print_uid
),
4525 "%s.%s.%04x.%02x", uid
.vendor
, uid
.serial
,
4526 uid
.ssid
, uid
.base_unit_addr
);
4528 dev_info(&device
->cdev
->dev
,
4529 "An Alias device was reassigned to a new base device "
4530 "with UID: %s\n", print_uid
);
4538 static int dasd_eckd_read_message_buffer(struct dasd_device
*device
,
4539 struct dasd_rssd_messages
*messages
,
4542 struct dasd_rssd_messages
*message_buf
;
4543 struct dasd_psf_prssd_data
*prssdp
;
4544 struct dasd_ccw_req
*cqr
;
4548 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1 /* PSF */ + 1 /* RSSD */,
4549 (sizeof(struct dasd_psf_prssd_data
) +
4550 sizeof(struct dasd_rssd_messages
)),
4553 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
, "%s",
4554 "Could not allocate read message buffer request");
4555 return PTR_ERR(cqr
);
4558 cqr
->startdev
= device
;
4559 cqr
->memdev
= device
;
4561 cqr
->expires
= 10 * HZ
;
4562 set_bit(DASD_CQR_VERIFY_PATH
, &cqr
->flags
);
4563 /* dasd_sleep_on_immediatly does not do complex error
4564 * recovery so clear erp flag and set retry counter to
4566 clear_bit(DASD_CQR_FLAGS_USE_ERP
, &cqr
->flags
);
4569 /* Prepare for Read Subsystem Data */
4570 prssdp
= (struct dasd_psf_prssd_data
*) cqr
->data
;
4571 memset(prssdp
, 0, sizeof(struct dasd_psf_prssd_data
));
4572 prssdp
->order
= PSF_ORDER_PRSSD
;
4573 prssdp
->suborder
= 0x03; /* Message Buffer */
4574 /* all other bytes of prssdp must be zero */
4577 ccw
->cmd_code
= DASD_ECKD_CCW_PSF
;
4578 ccw
->count
= sizeof(struct dasd_psf_prssd_data
);
4579 ccw
->flags
|= CCW_FLAG_CC
;
4580 ccw
->flags
|= CCW_FLAG_SLI
;
4581 ccw
->cda
= (__u32
)(addr_t
) prssdp
;
4583 /* Read Subsystem Data - message buffer */
4584 message_buf
= (struct dasd_rssd_messages
*) (prssdp
+ 1);
4585 memset(message_buf
, 0, sizeof(struct dasd_rssd_messages
));
4588 ccw
->cmd_code
= DASD_ECKD_CCW_RSSD
;
4589 ccw
->count
= sizeof(struct dasd_rssd_messages
);
4590 ccw
->flags
|= CCW_FLAG_SLI
;
4591 ccw
->cda
= (__u32
)(addr_t
) message_buf
;
4593 cqr
->buildclk
= get_tod_clock();
4594 cqr
->status
= DASD_CQR_FILLED
;
4595 rc
= dasd_sleep_on_immediatly(cqr
);
4597 prssdp
= (struct dasd_psf_prssd_data
*) cqr
->data
;
4598 message_buf
= (struct dasd_rssd_messages
*)
4600 memcpy(messages
, message_buf
,
4601 sizeof(struct dasd_rssd_messages
));
4603 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
,
4604 "Reading messages failed with rc=%d\n"
4606 dasd_sfree_request(cqr
, cqr
->memdev
);
4611 * Perform Subsystem Function - CUIR response
4614 dasd_eckd_psf_cuir_response(struct dasd_device
*device
, int response
,
4616 struct channel_path_desc
*desc
,
4617 struct subchannel_id sch_id
)
4619 struct dasd_psf_cuir_response
*psf_cuir
;
4620 struct dasd_ccw_req
*cqr
;
4624 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1 /* PSF */ ,
4625 sizeof(struct dasd_psf_cuir_response
),
4629 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
4630 "Could not allocate PSF-CUIR request");
4631 return PTR_ERR(cqr
);
4634 psf_cuir
= (struct dasd_psf_cuir_response
*)cqr
->data
;
4635 psf_cuir
->order
= PSF_ORDER_CUIR_RESPONSE
;
4636 psf_cuir
->cc
= response
;
4638 psf_cuir
->chpid
= desc
->chpid
;
4639 psf_cuir
->message_id
= message_id
;
4640 psf_cuir
->cssid
= sch_id
.cssid
;
4641 psf_cuir
->ssid
= sch_id
.ssid
;
4643 ccw
->cmd_code
= DASD_ECKD_CCW_PSF
;
4644 ccw
->cda
= (__u32
)(addr_t
)psf_cuir
;
4645 ccw
->flags
= CCW_FLAG_SLI
;
4646 ccw
->count
= sizeof(struct dasd_psf_cuir_response
);
4648 cqr
->startdev
= device
;
4649 cqr
->memdev
= device
;
4652 cqr
->expires
= 10*HZ
;
4653 cqr
->buildclk
= get_tod_clock();
4654 cqr
->status
= DASD_CQR_FILLED
;
4655 set_bit(DASD_CQR_VERIFY_PATH
, &cqr
->flags
);
4657 rc
= dasd_sleep_on(cqr
);
4659 dasd_sfree_request(cqr
, cqr
->memdev
);
4664 * return configuration data that is referenced by record selector
4665 * if a record selector is specified or per default return the
4666 * conf_data pointer for the path specified by lpum
4668 static struct dasd_conf_data
*dasd_eckd_get_ref_conf(struct dasd_device
*device
,
4670 struct dasd_cuir_message
*cuir
)
4672 struct dasd_eckd_private
*private = device
->private;
4673 struct dasd_conf_data
*conf_data
;
4676 if (cuir
->record_selector
== 0)
4678 for (path
= 0x80, pos
= 0; path
; path
>>= 1, pos
++) {
4679 conf_data
= private->path_conf_data
[pos
];
4680 if (conf_data
->gneq
.record_selector
==
4681 cuir
->record_selector
)
4685 return private->path_conf_data
[pathmask_to_pos(lpum
)];
4689 * This function determines the scope of a reconfiguration request by
4690 * analysing the path and device selection data provided in the CUIR request.
4691 * Returns a path mask containing CUIR affected paths for the give device.
4693 * If the CUIR request does not contain the required information return the
4694 * path mask of the path the attention message for the CUIR request was reveived
4697 static int dasd_eckd_cuir_scope(struct dasd_device
*device
, __u8 lpum
,
4698 struct dasd_cuir_message
*cuir
)
4700 struct dasd_eckd_private
*private = device
->private;
4701 struct dasd_conf_data
*ref_conf_data
;
4702 unsigned long bitmask
= 0, mask
= 0;
4703 struct dasd_conf_data
*conf_data
;
4704 unsigned int pos
, path
;
4705 char *ref_gneq
, *gneq
;
4706 char *ref_ned
, *ned
;
4709 /* if CUIR request does not specify the scope use the path
4710 the attention message was presented on */
4711 if (!cuir
->ned_map
||
4712 !(cuir
->neq_map
[0] | cuir
->neq_map
[1] | cuir
->neq_map
[2]))
4715 /* get reference conf data */
4716 ref_conf_data
= dasd_eckd_get_ref_conf(device
, lpum
, cuir
);
4717 /* reference ned is determined by ned_map field */
4718 pos
= 8 - ffs(cuir
->ned_map
);
4719 ref_ned
= (char *)&ref_conf_data
->neds
[pos
];
4720 ref_gneq
= (char *)&ref_conf_data
->gneq
;
4721 /* transfer 24 bit neq_map to mask */
4722 mask
= cuir
->neq_map
[2];
4723 mask
|= cuir
->neq_map
[1] << 8;
4724 mask
|= cuir
->neq_map
[0] << 16;
4726 for (path
= 0x80; path
; path
>>= 1) {
4727 /* initialise data per path */
4729 pos
= pathmask_to_pos(path
);
4730 conf_data
= private->path_conf_data
[pos
];
4731 pos
= 8 - ffs(cuir
->ned_map
);
4732 ned
= (char *) &conf_data
->neds
[pos
];
4733 /* compare reference ned and per path ned */
4734 if (memcmp(ref_ned
, ned
, sizeof(*ned
)) != 0)
4736 gneq
= (char *)&conf_data
->gneq
;
4737 /* compare reference gneq and per_path gneq under
4738 24 bit mask where mask bit 0 equals byte 7 of
4739 the gneq and mask bit 24 equals byte 31 */
4741 pos
= ffs(bitmask
) - 1;
4742 if (memcmp(&ref_gneq
[31 - pos
], &gneq
[31 - pos
], 1)
4745 clear_bit(pos
, &bitmask
);
4749 /* device and path match the reference values
4750 add path to CUIR scope */
4756 static void dasd_eckd_cuir_notify_user(struct dasd_device
*device
,
4757 unsigned long paths
,
4758 struct subchannel_id sch_id
, int action
)
4760 struct channel_path_desc
*desc
;
4764 /* get position of bit in mask */
4765 pos
= ffs(paths
) - 1;
4766 /* get channel path descriptor from this position */
4767 desc
= ccw_device_get_chp_desc(device
->cdev
, 7 - pos
);
4768 if (action
== CUIR_QUIESCE
)
4769 pr_warn("Service on the storage server caused path "
4770 "%x.%02x to go offline", sch_id
.cssid
,
4771 desc
? desc
->chpid
: 0);
4772 else if (action
== CUIR_RESUME
)
4773 pr_info("Path %x.%02x is back online after service "
4774 "on the storage server", sch_id
.cssid
,
4775 desc
? desc
->chpid
: 0);
4777 clear_bit(pos
, &paths
);
4781 static int dasd_eckd_cuir_remove_path(struct dasd_device
*device
, __u8 lpum
,
4782 struct dasd_cuir_message
*cuir
)
4784 unsigned long tbcpm
;
4786 tbcpm
= dasd_eckd_cuir_scope(device
, lpum
, cuir
);
4787 /* nothing to do if path is not in use */
4788 if (!(device
->path_data
.opm
& tbcpm
))
4790 if (!(device
->path_data
.opm
& ~tbcpm
)) {
4791 /* no path would be left if the CUIR action is taken
4795 /* remove device from operational path mask */
4796 device
->path_data
.opm
&= ~tbcpm
;
4797 device
->path_data
.cuirpm
|= tbcpm
;
4802 * walk through all devices and build a path mask to quiesce them
4803 * return an error if the last path to a device would be removed
4805 * if only part of the devices are quiesced and an error
4806 * occurs no onlining necessary, the storage server will
4807 * notify the already set offline devices again
4809 static int dasd_eckd_cuir_quiesce(struct dasd_device
*device
, __u8 lpum
,
4810 struct subchannel_id sch_id
,
4811 struct dasd_cuir_message
*cuir
)
4813 struct dasd_eckd_private
*private = device
->private;
4814 struct alias_pav_group
*pavgroup
, *tempgroup
;
4815 struct dasd_device
*dev
, *n
;
4816 unsigned long paths
= 0;
4817 unsigned long flags
;
4820 /* active devices */
4821 list_for_each_entry_safe(dev
, n
, &private->lcu
->active_devices
,
4823 spin_lock_irqsave(get_ccwdev_lock(dev
->cdev
), flags
);
4824 tbcpm
= dasd_eckd_cuir_remove_path(dev
, lpum
, cuir
);
4825 spin_unlock_irqrestore(get_ccwdev_lock(dev
->cdev
), flags
);
4830 /* inactive devices */
4831 list_for_each_entry_safe(dev
, n
, &private->lcu
->inactive_devices
,
4833 spin_lock_irqsave(get_ccwdev_lock(dev
->cdev
), flags
);
4834 tbcpm
= dasd_eckd_cuir_remove_path(dev
, lpum
, cuir
);
4835 spin_unlock_irqrestore(get_ccwdev_lock(dev
->cdev
), flags
);
4840 /* devices in PAV groups */
4841 list_for_each_entry_safe(pavgroup
, tempgroup
,
4842 &private->lcu
->grouplist
, group
) {
4843 list_for_each_entry_safe(dev
, n
, &pavgroup
->baselist
,
4845 spin_lock_irqsave(get_ccwdev_lock(dev
->cdev
), flags
);
4846 tbcpm
= dasd_eckd_cuir_remove_path(dev
, lpum
, cuir
);
4847 spin_unlock_irqrestore(
4848 get_ccwdev_lock(dev
->cdev
), flags
);
4853 list_for_each_entry_safe(dev
, n
, &pavgroup
->aliaslist
,
4855 spin_lock_irqsave(get_ccwdev_lock(dev
->cdev
), flags
);
4856 tbcpm
= dasd_eckd_cuir_remove_path(dev
, lpum
, cuir
);
4857 spin_unlock_irqrestore(
4858 get_ccwdev_lock(dev
->cdev
), flags
);
4864 /* notify user about all paths affected by CUIR action */
4865 dasd_eckd_cuir_notify_user(device
, paths
, sch_id
, CUIR_QUIESCE
);
4871 static int dasd_eckd_cuir_resume(struct dasd_device
*device
, __u8 lpum
,
4872 struct subchannel_id sch_id
,
4873 struct dasd_cuir_message
*cuir
)
4875 struct dasd_eckd_private
*private = device
->private;
4876 struct alias_pav_group
*pavgroup
, *tempgroup
;
4877 struct dasd_device
*dev
, *n
;
4878 unsigned long paths
= 0;
4882 * the path may have been added through a generic path event before
4883 * only trigger path verification if the path is not already in use
4885 list_for_each_entry_safe(dev
, n
,
4886 &private->lcu
->active_devices
,
4888 tbcpm
= dasd_eckd_cuir_scope(dev
, lpum
, cuir
);
4890 if (!(dev
->path_data
.opm
& tbcpm
)) {
4891 dev
->path_data
.tbvpm
|= tbcpm
;
4892 dasd_schedule_device_bh(dev
);
4895 list_for_each_entry_safe(dev
, n
,
4896 &private->lcu
->inactive_devices
,
4898 tbcpm
= dasd_eckd_cuir_scope(dev
, lpum
, cuir
);
4900 if (!(dev
->path_data
.opm
& tbcpm
)) {
4901 dev
->path_data
.tbvpm
|= tbcpm
;
4902 dasd_schedule_device_bh(dev
);
4905 /* devices in PAV groups */
4906 list_for_each_entry_safe(pavgroup
, tempgroup
,
4907 &private->lcu
->grouplist
,
4909 list_for_each_entry_safe(dev
, n
,
4910 &pavgroup
->baselist
,
4912 tbcpm
= dasd_eckd_cuir_scope(dev
, lpum
, cuir
);
4914 if (!(dev
->path_data
.opm
& tbcpm
)) {
4915 dev
->path_data
.tbvpm
|= tbcpm
;
4916 dasd_schedule_device_bh(dev
);
4919 list_for_each_entry_safe(dev
, n
,
4920 &pavgroup
->aliaslist
,
4922 tbcpm
= dasd_eckd_cuir_scope(dev
, lpum
, cuir
);
4924 if (!(dev
->path_data
.opm
& tbcpm
)) {
4925 dev
->path_data
.tbvpm
|= tbcpm
;
4926 dasd_schedule_device_bh(dev
);
4930 /* notify user about all paths affected by CUIR action */
4931 dasd_eckd_cuir_notify_user(device
, paths
, sch_id
, CUIR_RESUME
);
4935 static void dasd_eckd_handle_cuir(struct dasd_device
*device
, void *messages
,
4938 struct dasd_cuir_message
*cuir
= messages
;
4939 struct channel_path_desc
*desc
;
4940 struct subchannel_id sch_id
;
4943 DBF_DEV_EVENT(DBF_WARNING
, device
,
4944 "CUIR request: %016llx %016llx %016llx %08x",
4945 ((u64
*)cuir
)[0], ((u64
*)cuir
)[1], ((u64
*)cuir
)[2],
4947 ccw_device_get_schid(device
->cdev
, &sch_id
);
4948 pos
= pathmask_to_pos(lpum
);
4949 desc
= ccw_device_get_chp_desc(device
->cdev
, pos
);
4951 if (cuir
->code
== CUIR_QUIESCE
) {
4953 if (dasd_eckd_cuir_quiesce(device
, lpum
, sch_id
, cuir
))
4954 response
= PSF_CUIR_LAST_PATH
;
4956 response
= PSF_CUIR_COMPLETED
;
4957 } else if (cuir
->code
== CUIR_RESUME
) {
4959 dasd_eckd_cuir_resume(device
, lpum
, sch_id
, cuir
);
4960 response
= PSF_CUIR_COMPLETED
;
4962 response
= PSF_CUIR_NOT_SUPPORTED
;
4964 dasd_eckd_psf_cuir_response(device
, response
,
4965 cuir
->message_id
, desc
, sch_id
);
4966 DBF_DEV_EVENT(DBF_WARNING
, device
,
4967 "CUIR response: %d on message ID %08x", response
,
4969 /* free descriptor copy */
4971 /* to make sure there is no attention left schedule work again */
4972 device
->discipline
->check_attention(device
, lpum
);
4975 static void dasd_eckd_check_attention_work(struct work_struct
*work
)
4977 struct check_attention_work_data
*data
;
4978 struct dasd_rssd_messages
*messages
;
4979 struct dasd_device
*device
;
4982 data
= container_of(work
, struct check_attention_work_data
, worker
);
4983 device
= data
->device
;
4984 messages
= kzalloc(sizeof(*messages
), GFP_KERNEL
);
4986 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
4987 "Could not allocate attention message buffer");
4990 rc
= dasd_eckd_read_message_buffer(device
, messages
, data
->lpum
);
4993 if (messages
->length
== ATTENTION_LENGTH_CUIR
&&
4994 messages
->format
== ATTENTION_FORMAT_CUIR
)
4995 dasd_eckd_handle_cuir(device
, messages
, data
->lpum
);
4997 dasd_put_device(device
);
5002 static int dasd_eckd_check_attention(struct dasd_device
*device
, __u8 lpum
)
5004 struct check_attention_work_data
*data
;
5006 data
= kzalloc(sizeof(*data
), GFP_ATOMIC
);
5009 INIT_WORK(&data
->worker
, dasd_eckd_check_attention_work
);
5010 dasd_get_device(device
);
5011 data
->device
= device
;
5013 schedule_work(&data
->worker
);
5017 static struct ccw_driver dasd_eckd_driver
= {
5019 .name
= "dasd-eckd",
5020 .owner
= THIS_MODULE
,
5022 .ids
= dasd_eckd_ids
,
5023 .probe
= dasd_eckd_probe
,
5024 .remove
= dasd_generic_remove
,
5025 .set_offline
= dasd_generic_set_offline
,
5026 .set_online
= dasd_eckd_set_online
,
5027 .notify
= dasd_generic_notify
,
5028 .path_event
= dasd_generic_path_event
,
5029 .shutdown
= dasd_generic_shutdown
,
5030 .freeze
= dasd_generic_pm_freeze
,
5031 .thaw
= dasd_generic_restore_device
,
5032 .restore
= dasd_generic_restore_device
,
5033 .uc_handler
= dasd_generic_uc_handler
,
5034 .int_class
= IRQIO_DAS
,
5038 * max_blocks is dependent on the amount of storage that is available
5039 * in the static io buffer for each device. Currently each device has
5040 * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has
5041 * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use
5042 * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In
5043 * addition we have one define extent ccw + 16 bytes of data and one
5044 * locate record ccw + 16 bytes of data. That makes:
5045 * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum.
5046 * We want to fit two into the available memory so that we can immediately
5047 * start the next request if one finishes off. That makes 249.5 blocks
5048 * for one request. Give a little safety and the result is 240.
5050 static struct dasd_discipline dasd_eckd_discipline
= {
5051 .owner
= THIS_MODULE
,
5055 .check_device
= dasd_eckd_check_characteristics
,
5056 .uncheck_device
= dasd_eckd_uncheck_device
,
5057 .do_analysis
= dasd_eckd_do_analysis
,
5058 .verify_path
= dasd_eckd_verify_path
,
5059 .basic_to_ready
= dasd_eckd_basic_to_ready
,
5060 .online_to_ready
= dasd_eckd_online_to_ready
,
5061 .basic_to_known
= dasd_eckd_basic_to_known
,
5062 .fill_geometry
= dasd_eckd_fill_geometry
,
5063 .start_IO
= dasd_start_IO
,
5064 .term_IO
= dasd_term_IO
,
5065 .handle_terminated_request
= dasd_eckd_handle_terminated_request
,
5066 .format_device
= dasd_eckd_format_device
,
5067 .erp_action
= dasd_eckd_erp_action
,
5068 .erp_postaction
= dasd_eckd_erp_postaction
,
5069 .check_for_device_change
= dasd_eckd_check_for_device_change
,
5070 .build_cp
= dasd_eckd_build_alias_cp
,
5071 .free_cp
= dasd_eckd_free_alias_cp
,
5072 .dump_sense
= dasd_eckd_dump_sense
,
5073 .dump_sense_dbf
= dasd_eckd_dump_sense_dbf
,
5074 .fill_info
= dasd_eckd_fill_info
,
5075 .ioctl
= dasd_eckd_ioctl
,
5076 .freeze
= dasd_eckd_pm_freeze
,
5077 .restore
= dasd_eckd_restore_device
,
5078 .reload
= dasd_eckd_reload_device
,
5079 .get_uid
= dasd_eckd_get_uid
,
5080 .kick_validate
= dasd_eckd_kick_validate_server
,
5081 .check_attention
= dasd_eckd_check_attention
,
5085 dasd_eckd_init(void)
5089 ASCEBC(dasd_eckd_discipline
.ebcname
, 4);
5090 dasd_reserve_req
= kmalloc(sizeof(*dasd_reserve_req
),
5091 GFP_KERNEL
| GFP_DMA
);
5092 if (!dasd_reserve_req
)
5094 path_verification_worker
= kmalloc(sizeof(*path_verification_worker
),
5095 GFP_KERNEL
| GFP_DMA
);
5096 if (!path_verification_worker
) {
5097 kfree(dasd_reserve_req
);
5100 rawpadpage
= (void *)__get_free_page(GFP_KERNEL
);
5102 kfree(path_verification_worker
);
5103 kfree(dasd_reserve_req
);
5106 ret
= ccw_driver_register(&dasd_eckd_driver
);
5108 wait_for_device_probe();
5110 kfree(path_verification_worker
);
5111 kfree(dasd_reserve_req
);
5112 free_page((unsigned long)rawpadpage
);
5118 dasd_eckd_cleanup(void)
5120 ccw_driver_unregister(&dasd_eckd_driver
);
5121 kfree(path_verification_worker
);
5122 kfree(dasd_reserve_req
);
5123 free_page((unsigned long)rawpadpage
);
5126 module_init(dasd_eckd_init
);
5127 module_exit(dasd_eckd_cleanup
);