2 * File...........: linux/drivers/s390/block/dasd_eckd.c
3 * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
4 * Horst Hummel <Horst.Hummel@de.ibm.com>
5 * Carsten Otte <Cotte@de.ibm.com>
6 * Martin Schwidefsky <schwidefsky@de.ibm.com>
7 * Bugreports.to..: <Linux390@de.ibm.com>
8 * Copyright IBM Corp. 1999, 2009
9 * EMC Symmetrix ioctl Copyright EMC Corporation, 2008
10 * Author.........: Nigel Hislop <hislop_nigel@emc.com>
13 #define KMSG_COMPONENT "dasd-eckd"
15 #include <linux/stddef.h>
16 #include <linux/kernel.h>
17 #include <linux/slab.h>
18 #include <linux/hdreg.h> /* HDIO_GETGEO */
19 #include <linux/bio.h>
20 #include <linux/module.h>
21 #include <linux/init.h>
23 #include <asm/debug.h>
24 #include <asm/idals.h>
25 #include <asm/ebcdic.h>
26 #include <asm/compat.h>
28 #include <asm/uaccess.h>
30 #include <asm/ccwdev.h>
34 #include "dasd_eckd.h"
35 #include "../cio/chsc.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)
57 MODULE_LICENSE("GPL");
59 static struct dasd_discipline dasd_eckd_discipline
;
61 /* The ccw bus type uses this table to find devices that it sends to
63 static struct ccw_device_id dasd_eckd_ids
[] = {
64 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info
= 0x1},
65 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info
= 0x2},
66 { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3390, 0), .driver_info
= 0x3},
67 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info
= 0x4},
68 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info
= 0x5},
69 { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info
= 0x6},
70 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info
= 0x7},
71 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info
= 0x8},
72 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info
= 0x9},
73 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info
= 0xa},
74 { /* end of list */ },
77 MODULE_DEVICE_TABLE(ccw
, dasd_eckd_ids
);
79 static struct ccw_driver dasd_eckd_driver
; /* see below */
82 #define INIT_CQR_UNFORMATTED 1
83 #define INIT_CQR_ERROR 2
86 /* initial attempt at a probe function. this can be simplified once
87 * the other detection code is gone */
89 dasd_eckd_probe (struct ccw_device
*cdev
)
93 /* set ECKD specific ccw-device options */
94 ret
= ccw_device_set_options(cdev
, CCWDEV_ALLOW_FORCE
|
95 CCWDEV_DO_PATHGROUP
| CCWDEV_DO_MULTIPATH
);
97 DBF_EVENT_DEVID(DBF_WARNING
, cdev
, "%s",
98 "dasd_eckd_probe: could not set "
99 "ccw-device options");
102 ret
= dasd_generic_probe(cdev
, &dasd_eckd_discipline
);
107 dasd_eckd_set_online(struct ccw_device
*cdev
)
109 return dasd_generic_set_online(cdev
, &dasd_eckd_discipline
);
112 static const int sizes_trk0
[] = { 28, 148, 84 };
113 #define LABEL_SIZE 140
115 static inline unsigned int
116 round_up_multiple(unsigned int no
, unsigned int mult
)
119 return (rem
? no
- rem
+ mult
: no
);
122 static inline unsigned int
123 ceil_quot(unsigned int d1
, unsigned int d2
)
125 return (d1
+ (d2
- 1)) / d2
;
129 recs_per_track(struct dasd_eckd_characteristics
* rdc
,
130 unsigned int kl
, unsigned int dl
)
134 switch (rdc
->dev_type
) {
137 return 1499 / (15 + 7 + ceil_quot(kl
+ 12, 32) +
138 ceil_quot(dl
+ 12, 32));
140 return 1499 / (15 + ceil_quot(dl
+ 12, 32));
142 dn
= ceil_quot(dl
+ 6, 232) + 1;
144 kn
= ceil_quot(kl
+ 6, 232) + 1;
145 return 1729 / (10 + 9 + ceil_quot(kl
+ 6 * kn
, 34) +
146 9 + ceil_quot(dl
+ 6 * dn
, 34));
148 return 1729 / (10 + 9 + ceil_quot(dl
+ 6 * dn
, 34));
150 dn
= ceil_quot(dl
+ 6, 232) + 1;
152 kn
= ceil_quot(kl
+ 6, 232) + 1;
153 return 1420 / (18 + 7 + ceil_quot(kl
+ 6 * kn
, 34) +
154 ceil_quot(dl
+ 6 * dn
, 34));
156 return 1420 / (18 + 7 + ceil_quot(dl
+ 6 * dn
, 34));
161 static void set_ch_t(struct ch_t
*geo
, __u32 cyl
, __u8 head
)
163 geo
->cyl
= (__u16
) cyl
;
164 geo
->head
= cyl
>> 16;
170 check_XRC (struct ccw1
*de_ccw
,
171 struct DE_eckd_data
*data
,
172 struct dasd_device
*device
)
174 struct dasd_eckd_private
*private;
177 private = (struct dasd_eckd_private
*) device
->private;
178 if (!private->rdc_data
.facilities
.XRC_supported
)
181 /* switch on System Time Stamp - needed for XRC Support */
182 data
->ga_extended
|= 0x08; /* switch on 'Time Stamp Valid' */
183 data
->ga_extended
|= 0x02; /* switch on 'Extended Parameter' */
185 rc
= get_sync_clock(&data
->ep_sys_time
);
186 /* Ignore return code if sync clock is switched off. */
187 if (rc
== -ENOSYS
|| rc
== -EACCES
)
190 de_ccw
->count
= sizeof(struct DE_eckd_data
);
191 de_ccw
->flags
|= CCW_FLAG_SLI
;
196 define_extent(struct ccw1
*ccw
, struct DE_eckd_data
*data
, unsigned int trk
,
197 unsigned int totrk
, int cmd
, struct dasd_device
*device
)
199 struct dasd_eckd_private
*private;
201 u16 heads
, beghead
, endhead
;
204 private = (struct dasd_eckd_private
*) device
->private;
206 ccw
->cmd_code
= DASD_ECKD_CCW_DEFINE_EXTENT
;
209 ccw
->cda
= (__u32
) __pa(data
);
211 memset(data
, 0, sizeof(struct DE_eckd_data
));
213 case DASD_ECKD_CCW_READ_HOME_ADDRESS
:
214 case DASD_ECKD_CCW_READ_RECORD_ZERO
:
215 case DASD_ECKD_CCW_READ
:
216 case DASD_ECKD_CCW_READ_MT
:
217 case DASD_ECKD_CCW_READ_CKD
:
218 case DASD_ECKD_CCW_READ_CKD_MT
:
219 case DASD_ECKD_CCW_READ_KD
:
220 case DASD_ECKD_CCW_READ_KD_MT
:
221 case DASD_ECKD_CCW_READ_COUNT
:
222 data
->mask
.perm
= 0x1;
223 data
->attributes
.operation
= private->attrib
.operation
;
225 case DASD_ECKD_CCW_WRITE
:
226 case DASD_ECKD_CCW_WRITE_MT
:
227 case DASD_ECKD_CCW_WRITE_KD
:
228 case DASD_ECKD_CCW_WRITE_KD_MT
:
229 data
->mask
.perm
= 0x02;
230 data
->attributes
.operation
= private->attrib
.operation
;
231 rc
= check_XRC (ccw
, data
, device
);
233 case DASD_ECKD_CCW_WRITE_CKD
:
234 case DASD_ECKD_CCW_WRITE_CKD_MT
:
235 data
->attributes
.operation
= DASD_BYPASS_CACHE
;
236 rc
= check_XRC (ccw
, data
, device
);
238 case DASD_ECKD_CCW_ERASE
:
239 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS
:
240 case DASD_ECKD_CCW_WRITE_RECORD_ZERO
:
241 data
->mask
.perm
= 0x3;
242 data
->mask
.auth
= 0x1;
243 data
->attributes
.operation
= DASD_BYPASS_CACHE
;
244 rc
= check_XRC (ccw
, data
, device
);
247 dev_err(&device
->cdev
->dev
,
248 "0x%x is not a known command\n", cmd
);
252 data
->attributes
.mode
= 0x3; /* ECKD */
254 if ((private->rdc_data
.cu_type
== 0x2105 ||
255 private->rdc_data
.cu_type
== 0x2107 ||
256 private->rdc_data
.cu_type
== 0x1750)
257 && !(private->uses_cdl
&& trk
< 2))
258 data
->ga_extended
|= 0x40; /* Regular Data Format Mode */
260 heads
= private->rdc_data
.trk_per_cyl
;
261 begcyl
= trk
/ heads
;
262 beghead
= trk
% heads
;
263 endcyl
= totrk
/ heads
;
264 endhead
= totrk
% heads
;
266 /* check for sequential prestage - enhance cylinder range */
267 if (data
->attributes
.operation
== DASD_SEQ_PRESTAGE
||
268 data
->attributes
.operation
== DASD_SEQ_ACCESS
) {
270 if (endcyl
+ private->attrib
.nr_cyl
< private->real_cyl
)
271 endcyl
+= private->attrib
.nr_cyl
;
273 endcyl
= (private->real_cyl
- 1);
276 set_ch_t(&data
->beg_ext
, begcyl
, beghead
);
277 set_ch_t(&data
->end_ext
, endcyl
, endhead
);
281 static int check_XRC_on_prefix(struct PFX_eckd_data
*pfxdata
,
282 struct dasd_device
*device
)
284 struct dasd_eckd_private
*private;
287 private = (struct dasd_eckd_private
*) device
->private;
288 if (!private->rdc_data
.facilities
.XRC_supported
)
291 /* switch on System Time Stamp - needed for XRC Support */
292 pfxdata
->define_extent
.ga_extended
|= 0x08; /* 'Time Stamp Valid' */
293 pfxdata
->define_extent
.ga_extended
|= 0x02; /* 'Extended Parameter' */
294 pfxdata
->validity
.time_stamp
= 1; /* 'Time Stamp Valid' */
296 rc
= get_sync_clock(&pfxdata
->define_extent
.ep_sys_time
);
297 /* Ignore return code if sync clock is switched off. */
298 if (rc
== -ENOSYS
|| rc
== -EACCES
)
303 static void fill_LRE_data(struct LRE_eckd_data
*data
, unsigned int trk
,
304 unsigned int rec_on_trk
, int count
, int cmd
,
305 struct dasd_device
*device
, unsigned int reclen
,
308 struct dasd_eckd_private
*private;
312 private = (struct dasd_eckd_private
*) device
->private;
314 memset(data
, 0, sizeof(*data
));
317 switch (private->rdc_data
.dev_type
) {
319 dn
= ceil_quot(reclen
+ 6, 232);
320 d
= 9 + ceil_quot(reclen
+ 6 * (dn
+ 1), 34);
321 sector
= (49 + (rec_on_trk
- 1) * (10 + d
)) / 8;
324 d
= 7 + ceil_quot(reclen
+ 12, 32);
325 sector
= (39 + (rec_on_trk
- 1) * (8 + d
)) / 7;
329 data
->sector
= sector
;
330 /* note: meaning of count depends on the operation
331 * for record based I/O it's the number of records, but for
332 * track based I/O it's the number of tracks
336 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS
:
337 data
->operation
.orientation
= 0x3;
338 data
->operation
.operation
= 0x03;
340 case DASD_ECKD_CCW_READ_HOME_ADDRESS
:
341 data
->operation
.orientation
= 0x3;
342 data
->operation
.operation
= 0x16;
344 case DASD_ECKD_CCW_WRITE_RECORD_ZERO
:
345 data
->operation
.orientation
= 0x1;
346 data
->operation
.operation
= 0x03;
349 case DASD_ECKD_CCW_READ_RECORD_ZERO
:
350 data
->operation
.orientation
= 0x3;
351 data
->operation
.operation
= 0x16;
354 case DASD_ECKD_CCW_WRITE
:
355 case DASD_ECKD_CCW_WRITE_MT
:
356 case DASD_ECKD_CCW_WRITE_KD
:
357 case DASD_ECKD_CCW_WRITE_KD_MT
:
358 data
->auxiliary
.length_valid
= 0x1;
359 data
->length
= reclen
;
360 data
->operation
.operation
= 0x01;
362 case DASD_ECKD_CCW_WRITE_CKD
:
363 case DASD_ECKD_CCW_WRITE_CKD_MT
:
364 data
->auxiliary
.length_valid
= 0x1;
365 data
->length
= reclen
;
366 data
->operation
.operation
= 0x03;
368 case DASD_ECKD_CCW_WRITE_TRACK_DATA
:
369 data
->auxiliary
.length_valid
= 0x1;
370 data
->length
= reclen
; /* not tlf, as one might think */
371 data
->operation
.operation
= 0x3F;
372 data
->extended_operation
= 0x23;
374 case DASD_ECKD_CCW_READ
:
375 case DASD_ECKD_CCW_READ_MT
:
376 case DASD_ECKD_CCW_READ_KD
:
377 case DASD_ECKD_CCW_READ_KD_MT
:
378 data
->auxiliary
.length_valid
= 0x1;
379 data
->length
= reclen
;
380 data
->operation
.operation
= 0x06;
382 case DASD_ECKD_CCW_READ_CKD
:
383 case DASD_ECKD_CCW_READ_CKD_MT
:
384 data
->auxiliary
.length_valid
= 0x1;
385 data
->length
= reclen
;
386 data
->operation
.operation
= 0x16;
388 case DASD_ECKD_CCW_READ_COUNT
:
389 data
->operation
.operation
= 0x06;
391 case DASD_ECKD_CCW_READ_TRACK_DATA
:
392 data
->auxiliary
.length_valid
= 0x1;
394 data
->operation
.operation
= 0x0C;
396 case DASD_ECKD_CCW_ERASE
:
397 data
->length
= reclen
;
398 data
->auxiliary
.length_valid
= 0x1;
399 data
->operation
.operation
= 0x0b;
402 DBF_DEV_EVENT(DBF_ERR
, device
,
403 "fill LRE unknown opcode 0x%x", cmd
);
406 set_ch_t(&data
->seek_addr
,
407 trk
/ private->rdc_data
.trk_per_cyl
,
408 trk
% private->rdc_data
.trk_per_cyl
);
409 data
->search_arg
.cyl
= data
->seek_addr
.cyl
;
410 data
->search_arg
.head
= data
->seek_addr
.head
;
411 data
->search_arg
.record
= rec_on_trk
;
414 static int prefix_LRE(struct ccw1
*ccw
, struct PFX_eckd_data
*pfxdata
,
415 unsigned int trk
, unsigned int totrk
, int cmd
,
416 struct dasd_device
*basedev
, struct dasd_device
*startdev
,
417 unsigned char format
, unsigned int rec_on_trk
, int count
,
418 unsigned int blksize
, unsigned int tlf
)
420 struct dasd_eckd_private
*basepriv
, *startpriv
;
421 struct DE_eckd_data
*dedata
;
422 struct LRE_eckd_data
*lredata
;
424 u16 heads
, beghead
, endhead
;
427 basepriv
= (struct dasd_eckd_private
*) basedev
->private;
428 startpriv
= (struct dasd_eckd_private
*) startdev
->private;
429 dedata
= &pfxdata
->define_extent
;
430 lredata
= &pfxdata
->locate_record
;
432 ccw
->cmd_code
= DASD_ECKD_CCW_PFX
;
434 ccw
->count
= sizeof(*pfxdata
);
435 ccw
->cda
= (__u32
) __pa(pfxdata
);
437 memset(pfxdata
, 0, sizeof(*pfxdata
));
440 DBF_DEV_EVENT(DBF_ERR
, basedev
,
441 "PFX LRE unknown format 0x%x", format
);
445 pfxdata
->format
= format
;
446 pfxdata
->base_address
= basepriv
->ned
->unit_addr
;
447 pfxdata
->base_lss
= basepriv
->ned
->ID
;
448 pfxdata
->validity
.define_extent
= 1;
450 /* private uid is kept up to date, conf_data may be outdated */
451 if (startpriv
->uid
.type
!= UA_BASE_DEVICE
) {
452 pfxdata
->validity
.verify_base
= 1;
453 if (startpriv
->uid
.type
== UA_HYPER_PAV_ALIAS
)
454 pfxdata
->validity
.hyper_pav
= 1;
457 /* define extend data (mostly)*/
459 case DASD_ECKD_CCW_READ_HOME_ADDRESS
:
460 case DASD_ECKD_CCW_READ_RECORD_ZERO
:
461 case DASD_ECKD_CCW_READ
:
462 case DASD_ECKD_CCW_READ_MT
:
463 case DASD_ECKD_CCW_READ_CKD
:
464 case DASD_ECKD_CCW_READ_CKD_MT
:
465 case DASD_ECKD_CCW_READ_KD
:
466 case DASD_ECKD_CCW_READ_KD_MT
:
467 case DASD_ECKD_CCW_READ_COUNT
:
468 dedata
->mask
.perm
= 0x1;
469 dedata
->attributes
.operation
= basepriv
->attrib
.operation
;
471 case DASD_ECKD_CCW_READ_TRACK_DATA
:
472 dedata
->mask
.perm
= 0x1;
473 dedata
->attributes
.operation
= basepriv
->attrib
.operation
;
474 dedata
->blk_size
= 0;
476 case DASD_ECKD_CCW_WRITE
:
477 case DASD_ECKD_CCW_WRITE_MT
:
478 case DASD_ECKD_CCW_WRITE_KD
:
479 case DASD_ECKD_CCW_WRITE_KD_MT
:
480 dedata
->mask
.perm
= 0x02;
481 dedata
->attributes
.operation
= basepriv
->attrib
.operation
;
482 rc
= check_XRC_on_prefix(pfxdata
, basedev
);
484 case DASD_ECKD_CCW_WRITE_CKD
:
485 case DASD_ECKD_CCW_WRITE_CKD_MT
:
486 dedata
->attributes
.operation
= DASD_BYPASS_CACHE
;
487 rc
= check_XRC_on_prefix(pfxdata
, basedev
);
489 case DASD_ECKD_CCW_ERASE
:
490 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS
:
491 case DASD_ECKD_CCW_WRITE_RECORD_ZERO
:
492 dedata
->mask
.perm
= 0x3;
493 dedata
->mask
.auth
= 0x1;
494 dedata
->attributes
.operation
= DASD_BYPASS_CACHE
;
495 rc
= check_XRC_on_prefix(pfxdata
, basedev
);
497 case DASD_ECKD_CCW_WRITE_TRACK_DATA
:
498 dedata
->mask
.perm
= 0x02;
499 dedata
->attributes
.operation
= basepriv
->attrib
.operation
;
500 dedata
->blk_size
= blksize
;
501 rc
= check_XRC_on_prefix(pfxdata
, basedev
);
504 DBF_DEV_EVENT(DBF_ERR
, basedev
,
505 "PFX LRE unknown opcode 0x%x", cmd
);
510 dedata
->attributes
.mode
= 0x3; /* ECKD */
512 if ((basepriv
->rdc_data
.cu_type
== 0x2105 ||
513 basepriv
->rdc_data
.cu_type
== 0x2107 ||
514 basepriv
->rdc_data
.cu_type
== 0x1750)
515 && !(basepriv
->uses_cdl
&& trk
< 2))
516 dedata
->ga_extended
|= 0x40; /* Regular Data Format Mode */
518 heads
= basepriv
->rdc_data
.trk_per_cyl
;
519 begcyl
= trk
/ heads
;
520 beghead
= trk
% heads
;
521 endcyl
= totrk
/ heads
;
522 endhead
= totrk
% heads
;
524 /* check for sequential prestage - enhance cylinder range */
525 if (dedata
->attributes
.operation
== DASD_SEQ_PRESTAGE
||
526 dedata
->attributes
.operation
== DASD_SEQ_ACCESS
) {
528 if (endcyl
+ basepriv
->attrib
.nr_cyl
< basepriv
->real_cyl
)
529 endcyl
+= basepriv
->attrib
.nr_cyl
;
531 endcyl
= (basepriv
->real_cyl
- 1);
534 set_ch_t(&dedata
->beg_ext
, begcyl
, beghead
);
535 set_ch_t(&dedata
->end_ext
, endcyl
, endhead
);
538 fill_LRE_data(lredata
, trk
, rec_on_trk
, count
, cmd
,
539 basedev
, blksize
, tlf
);
545 static int prefix(struct ccw1
*ccw
, struct PFX_eckd_data
*pfxdata
,
546 unsigned int trk
, unsigned int totrk
, int cmd
,
547 struct dasd_device
*basedev
, struct dasd_device
*startdev
)
549 return prefix_LRE(ccw
, pfxdata
, trk
, totrk
, cmd
, basedev
, startdev
,
554 locate_record(struct ccw1
*ccw
, struct LO_eckd_data
*data
, unsigned int trk
,
555 unsigned int rec_on_trk
, int no_rec
, int cmd
,
556 struct dasd_device
* device
, int reclen
)
558 struct dasd_eckd_private
*private;
562 private = (struct dasd_eckd_private
*) device
->private;
564 DBF_DEV_EVENT(DBF_INFO
, device
,
565 "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d",
566 trk
, rec_on_trk
, no_rec
, cmd
, reclen
);
568 ccw
->cmd_code
= DASD_ECKD_CCW_LOCATE_RECORD
;
571 ccw
->cda
= (__u32
) __pa(data
);
573 memset(data
, 0, sizeof(struct LO_eckd_data
));
576 switch (private->rdc_data
.dev_type
) {
578 dn
= ceil_quot(reclen
+ 6, 232);
579 d
= 9 + ceil_quot(reclen
+ 6 * (dn
+ 1), 34);
580 sector
= (49 + (rec_on_trk
- 1) * (10 + d
)) / 8;
583 d
= 7 + ceil_quot(reclen
+ 12, 32);
584 sector
= (39 + (rec_on_trk
- 1) * (8 + d
)) / 7;
588 data
->sector
= sector
;
589 data
->count
= no_rec
;
591 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS
:
592 data
->operation
.orientation
= 0x3;
593 data
->operation
.operation
= 0x03;
595 case DASD_ECKD_CCW_READ_HOME_ADDRESS
:
596 data
->operation
.orientation
= 0x3;
597 data
->operation
.operation
= 0x16;
599 case DASD_ECKD_CCW_WRITE_RECORD_ZERO
:
600 data
->operation
.orientation
= 0x1;
601 data
->operation
.operation
= 0x03;
604 case DASD_ECKD_CCW_READ_RECORD_ZERO
:
605 data
->operation
.orientation
= 0x3;
606 data
->operation
.operation
= 0x16;
609 case DASD_ECKD_CCW_WRITE
:
610 case DASD_ECKD_CCW_WRITE_MT
:
611 case DASD_ECKD_CCW_WRITE_KD
:
612 case DASD_ECKD_CCW_WRITE_KD_MT
:
613 data
->auxiliary
.last_bytes_used
= 0x1;
614 data
->length
= reclen
;
615 data
->operation
.operation
= 0x01;
617 case DASD_ECKD_CCW_WRITE_CKD
:
618 case DASD_ECKD_CCW_WRITE_CKD_MT
:
619 data
->auxiliary
.last_bytes_used
= 0x1;
620 data
->length
= reclen
;
621 data
->operation
.operation
= 0x03;
623 case DASD_ECKD_CCW_READ
:
624 case DASD_ECKD_CCW_READ_MT
:
625 case DASD_ECKD_CCW_READ_KD
:
626 case DASD_ECKD_CCW_READ_KD_MT
:
627 data
->auxiliary
.last_bytes_used
= 0x1;
628 data
->length
= reclen
;
629 data
->operation
.operation
= 0x06;
631 case DASD_ECKD_CCW_READ_CKD
:
632 case DASD_ECKD_CCW_READ_CKD_MT
:
633 data
->auxiliary
.last_bytes_used
= 0x1;
634 data
->length
= reclen
;
635 data
->operation
.operation
= 0x16;
637 case DASD_ECKD_CCW_READ_COUNT
:
638 data
->operation
.operation
= 0x06;
640 case DASD_ECKD_CCW_ERASE
:
641 data
->length
= reclen
;
642 data
->auxiliary
.last_bytes_used
= 0x1;
643 data
->operation
.operation
= 0x0b;
646 DBF_DEV_EVENT(DBF_ERR
, device
, "unknown locate record "
649 set_ch_t(&data
->seek_addr
,
650 trk
/ private->rdc_data
.trk_per_cyl
,
651 trk
% private->rdc_data
.trk_per_cyl
);
652 data
->search_arg
.cyl
= data
->seek_addr
.cyl
;
653 data
->search_arg
.head
= data
->seek_addr
.head
;
654 data
->search_arg
.record
= rec_on_trk
;
658 * Returns 1 if the block is one of the special blocks that needs
659 * to get read/written with the KD variant of the command.
660 * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and
661 * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT.
662 * Luckily the KD variants differ only by one bit (0x08) from the
663 * normal variant. So don't wonder about code like:
664 * if (dasd_eckd_cdl_special(blk_per_trk, recid))
665 * ccw->cmd_code |= 0x8;
668 dasd_eckd_cdl_special(int blk_per_trk
, int recid
)
672 if (recid
< blk_per_trk
)
674 if (recid
< 2 * blk_per_trk
)
680 * Returns the record size for the special blocks of the cdl format.
681 * Only returns something useful if dasd_eckd_cdl_special is true
685 dasd_eckd_cdl_reclen(int recid
)
688 return sizes_trk0
[recid
];
693 * Generate device unique id that specifies the physical device.
695 static int dasd_eckd_generate_uid(struct dasd_device
*device
,
696 struct dasd_uid
*uid
)
698 struct dasd_eckd_private
*private;
701 private = (struct dasd_eckd_private
*) device
->private;
704 if (!private->ned
|| !private->gneq
)
707 memset(uid
, 0, sizeof(struct dasd_uid
));
708 memcpy(uid
->vendor
, private->ned
->HDA_manufacturer
,
709 sizeof(uid
->vendor
) - 1);
710 EBCASC(uid
->vendor
, sizeof(uid
->vendor
) - 1);
711 memcpy(uid
->serial
, private->ned
->HDA_location
,
712 sizeof(uid
->serial
) - 1);
713 EBCASC(uid
->serial
, sizeof(uid
->serial
) - 1);
714 uid
->ssid
= private->gneq
->subsystemID
;
715 uid
->real_unit_addr
= private->ned
->unit_addr
;
717 uid
->type
= private->sneq
->sua_flags
;
718 if (uid
->type
== UA_BASE_PAV_ALIAS
)
719 uid
->base_unit_addr
= private->sneq
->base_unit_addr
;
721 uid
->type
= UA_BASE_DEVICE
;
723 if (private->vdsneq
) {
724 for (count
= 0; count
< 16; count
++) {
725 sprintf(uid
->vduit
+2*count
, "%02x",
726 private->vdsneq
->uit
[count
]);
732 static struct dasd_ccw_req
*dasd_eckd_build_rcd_lpm(struct dasd_device
*device
,
734 struct ciw
*ciw
, __u8 lpm
)
736 struct dasd_ccw_req
*cqr
;
739 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1 /* RCD */, ciw
->count
,
743 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
744 "Could not allocate RCD request");
749 ccw
->cmd_code
= ciw
->cmd
;
750 ccw
->cda
= (__u32
)(addr_t
)rcd_buffer
;
751 ccw
->count
= ciw
->count
;
753 cqr
->startdev
= device
;
754 cqr
->memdev
= device
;
756 cqr
->expires
= 10*HZ
;
759 cqr
->buildclk
= get_clock();
760 cqr
->status
= DASD_CQR_FILLED
;
764 static int dasd_eckd_read_conf_lpm(struct dasd_device
*device
,
766 int *rcd_buffer_size
, __u8 lpm
)
769 char *rcd_buf
= NULL
;
771 struct dasd_ccw_req
*cqr
;
774 * scan for RCD command in extended SenseID data
776 ciw
= ccw_device_get_ciw(device
->cdev
, CIW_TYPE_RCD
);
777 if (!ciw
|| ciw
->cmd
== 0) {
781 rcd_buf
= kzalloc(ciw
->count
, GFP_KERNEL
| GFP_DMA
);
788 * buffer has to start with EBCDIC "V1.0" to show
789 * support for virtual device SNEQ
795 cqr
= dasd_eckd_build_rcd_lpm(device
, rcd_buf
, ciw
, lpm
);
800 ret
= dasd_sleep_on(cqr
);
802 * on success we update the user input parms
804 dasd_sfree_request(cqr
, cqr
->memdev
);
808 *rcd_buffer_size
= ciw
->count
;
809 *rcd_buffer
= rcd_buf
;
814 *rcd_buffer_size
= 0;
818 static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private
*private)
821 struct dasd_sneq
*sneq
;
825 private->sneq
= NULL
;
826 private->vdsneq
= NULL
;
827 private->gneq
= NULL
;
828 count
= private->conf_len
/ sizeof(struct dasd_sneq
);
829 sneq
= (struct dasd_sneq
*)private->conf_data
;
830 for (i
= 0; i
< count
; ++i
) {
831 if (sneq
->flags
.identifier
== 1 && sneq
->format
== 1)
832 private->sneq
= sneq
;
833 else if (sneq
->flags
.identifier
== 1 && sneq
->format
== 4)
834 private->vdsneq
= (struct vd_sneq
*)sneq
;
835 else if (sneq
->flags
.identifier
== 2)
836 private->gneq
= (struct dasd_gneq
*)sneq
;
837 else if (sneq
->flags
.identifier
== 3 && sneq
->res1
== 1)
838 private->ned
= (struct dasd_ned
*)sneq
;
841 if (!private->ned
|| !private->gneq
) {
843 private->sneq
= NULL
;
844 private->vdsneq
= NULL
;
845 private->gneq
= NULL
;
852 static unsigned char dasd_eckd_path_access(void *conf_data
, int conf_len
)
854 struct dasd_gneq
*gneq
;
857 count
= conf_len
/ sizeof(*gneq
);
858 gneq
= (struct dasd_gneq
*)conf_data
;
860 for (i
= 0; i
< count
; ++i
) {
861 if (gneq
->flags
.identifier
== 2) {
868 return ((char *)gneq
)[18] & 0x07;
873 static int dasd_eckd_read_conf(struct dasd_device
*device
)
876 int conf_len
, conf_data_saved
;
879 struct dasd_eckd_private
*private;
880 struct dasd_eckd_path
*path_data
;
882 private = (struct dasd_eckd_private
*) device
->private;
883 path_data
= (struct dasd_eckd_path
*) &private->path_data
;
884 path_data
->opm
= ccw_device_get_path_mask(device
->cdev
);
887 /* get configuration data per operational path */
888 for (lpm
= 0x80; lpm
; lpm
>>= 1) {
889 if (lpm
& path_data
->opm
){
890 rc
= dasd_eckd_read_conf_lpm(device
, &conf_data
,
892 if (rc
&& rc
!= -EOPNOTSUPP
) { /* -EOPNOTSUPP is ok */
893 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
,
894 "Read configuration data returned "
898 if (conf_data
== NULL
) {
899 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
, "%s",
900 "No configuration data "
902 continue; /* no error */
904 /* save first valid configuration data */
905 if (!conf_data_saved
) {
906 kfree(private->conf_data
);
907 private->conf_data
= conf_data
;
908 private->conf_len
= conf_len
;
909 if (dasd_eckd_identify_conf_parts(private)) {
910 private->conf_data
= NULL
;
911 private->conf_len
= 0;
917 switch (dasd_eckd_path_access(conf_data
, conf_len
)) {
919 path_data
->npm
|= lpm
;
922 path_data
->ppm
|= lpm
;
925 if (conf_data
!= private->conf_data
)
932 static int dasd_eckd_read_features(struct dasd_device
*device
)
934 struct dasd_psf_prssd_data
*prssdp
;
935 struct dasd_rssd_features
*features
;
936 struct dasd_ccw_req
*cqr
;
939 struct dasd_eckd_private
*private;
941 private = (struct dasd_eckd_private
*) device
->private;
942 memset(&private->features
, 0, sizeof(struct dasd_rssd_features
));
943 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1 /* PSF */ + 1 /* RSSD */,
944 (sizeof(struct dasd_psf_prssd_data
) +
945 sizeof(struct dasd_rssd_features
)),
948 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
, "%s", "Could not "
949 "allocate initialization request");
952 cqr
->startdev
= device
;
953 cqr
->memdev
= device
;
956 cqr
->expires
= 10 * HZ
;
958 /* Prepare for Read Subsystem Data */
959 prssdp
= (struct dasd_psf_prssd_data
*) cqr
->data
;
960 memset(prssdp
, 0, sizeof(struct dasd_psf_prssd_data
));
961 prssdp
->order
= PSF_ORDER_PRSSD
;
962 prssdp
->suborder
= 0x41; /* Read Feature Codes */
963 /* all other bytes of prssdp must be zero */
966 ccw
->cmd_code
= DASD_ECKD_CCW_PSF
;
967 ccw
->count
= sizeof(struct dasd_psf_prssd_data
);
968 ccw
->flags
|= CCW_FLAG_CC
;
969 ccw
->cda
= (__u32
)(addr_t
) prssdp
;
971 /* Read Subsystem Data - feature codes */
972 features
= (struct dasd_rssd_features
*) (prssdp
+ 1);
973 memset(features
, 0, sizeof(struct dasd_rssd_features
));
976 ccw
->cmd_code
= DASD_ECKD_CCW_RSSD
;
977 ccw
->count
= sizeof(struct dasd_rssd_features
);
978 ccw
->cda
= (__u32
)(addr_t
) features
;
980 cqr
->buildclk
= get_clock();
981 cqr
->status
= DASD_CQR_FILLED
;
982 rc
= dasd_sleep_on(cqr
);
984 prssdp
= (struct dasd_psf_prssd_data
*) cqr
->data
;
985 features
= (struct dasd_rssd_features
*) (prssdp
+ 1);
986 memcpy(&private->features
, features
,
987 sizeof(struct dasd_rssd_features
));
989 dev_warn(&device
->cdev
->dev
, "Reading device feature codes"
990 " failed with rc=%d\n", rc
);
991 dasd_sfree_request(cqr
, cqr
->memdev
);
997 * Build CP for Perform Subsystem Function - SSC.
999 static struct dasd_ccw_req
*dasd_eckd_build_psf_ssc(struct dasd_device
*device
,
1002 struct dasd_ccw_req
*cqr
;
1003 struct dasd_psf_ssc_data
*psf_ssc_data
;
1006 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1 /* PSF */ ,
1007 sizeof(struct dasd_psf_ssc_data
),
1011 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
1012 "Could not allocate PSF-SSC request");
1015 psf_ssc_data
= (struct dasd_psf_ssc_data
*)cqr
->data
;
1016 psf_ssc_data
->order
= PSF_ORDER_SSC
;
1017 psf_ssc_data
->suborder
= 0xc0;
1019 psf_ssc_data
->suborder
|= 0x08;
1020 psf_ssc_data
->reserved
[0] = 0x88;
1023 ccw
->cmd_code
= DASD_ECKD_CCW_PSF
;
1024 ccw
->cda
= (__u32
)(addr_t
)psf_ssc_data
;
1027 cqr
->startdev
= device
;
1028 cqr
->memdev
= device
;
1031 cqr
->expires
= 10*HZ
;
1032 cqr
->buildclk
= get_clock();
1033 cqr
->status
= DASD_CQR_FILLED
;
1038 * Perform Subsystem Function.
1039 * It is necessary to trigger CIO for channel revalidation since this
1040 * call might change behaviour of DASD devices.
1043 dasd_eckd_psf_ssc(struct dasd_device
*device
, int enable_pav
)
1045 struct dasd_ccw_req
*cqr
;
1048 cqr
= dasd_eckd_build_psf_ssc(device
, enable_pav
);
1050 return PTR_ERR(cqr
);
1052 rc
= dasd_sleep_on(cqr
);
1054 /* trigger CIO to reprobe devices */
1055 css_schedule_reprobe();
1056 dasd_sfree_request(cqr
, cqr
->memdev
);
1061 * Valide storage server of current device.
1063 static void dasd_eckd_validate_server(struct dasd_device
*device
)
1066 struct dasd_eckd_private
*private;
1069 if (dasd_nopav
|| MACHINE_IS_VM
)
1073 rc
= dasd_eckd_psf_ssc(device
, enable_pav
);
1075 /* may be requested feature is not available on server,
1076 * therefore just report error and go ahead */
1077 private = (struct dasd_eckd_private
*) device
->private;
1078 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
, "PSF-SSC for SSID %04x "
1079 "returned rc=%d", private->uid
.ssid
, rc
);
1083 * Check device characteristics.
1084 * If the device is accessible using ECKD discipline, the device is enabled.
1087 dasd_eckd_check_characteristics(struct dasd_device
*device
)
1089 struct dasd_eckd_private
*private;
1090 struct dasd_block
*block
;
1093 if (!ccw_device_is_pathgroup(device
->cdev
)) {
1094 dev_warn(&device
->cdev
->dev
,
1095 "A channel path group could not be established\n");
1098 if (!ccw_device_is_multipath(device
->cdev
)) {
1099 dev_info(&device
->cdev
->dev
,
1100 "The DASD is not operating in multipath mode\n");
1102 private = (struct dasd_eckd_private
*) device
->private;
1104 private = kzalloc(sizeof(*private), GFP_KERNEL
| GFP_DMA
);
1106 dev_warn(&device
->cdev
->dev
,
1107 "Allocating memory for private DASD data "
1111 device
->private = (void *) private;
1113 memset(private, 0, sizeof(*private));
1115 /* Invalidate status of initial analysis. */
1116 private->init_cqr_status
= -1;
1117 /* Set default cache operations. */
1118 private->attrib
.operation
= DASD_NORMAL_CACHE
;
1119 private->attrib
.nr_cyl
= 0;
1121 /* Read Configuration Data */
1122 rc
= dasd_eckd_read_conf(device
);
1126 /* Generate device unique id and register in devmap */
1127 rc
= dasd_eckd_generate_uid(device
, &private->uid
);
1130 dasd_set_uid(device
->cdev
, &private->uid
);
1132 if (private->uid
.type
== UA_BASE_DEVICE
) {
1133 block
= dasd_alloc_block();
1134 if (IS_ERR(block
)) {
1135 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
, "%s",
1136 "could not allocate dasd "
1138 rc
= PTR_ERR(block
);
1141 device
->block
= block
;
1142 block
->base
= device
;
1145 /* register lcu with alias handling, enable PAV if this is a new lcu */
1146 is_known
= dasd_alias_make_device_known_to_lcu(device
);
1152 * dasd_eckd_vaildate_server is done on the first device that
1153 * is found for an LCU. All later other devices have to wait
1154 * for it, so they will read the correct feature codes.
1157 dasd_eckd_validate_server(device
);
1158 dasd_alias_lcu_setup_complete(device
);
1160 dasd_alias_wait_for_lcu_setup(device
);
1162 /* device may report different configuration data after LCU setup */
1163 rc
= dasd_eckd_read_conf(device
);
1167 /* Read Feature Codes */
1168 dasd_eckd_read_features(device
);
1170 /* Read Device Characteristics */
1171 rc
= dasd_generic_read_dev_chars(device
, DASD_ECKD_MAGIC
,
1172 &private->rdc_data
, 64);
1174 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
,
1175 "Read device characteristic failed, rc=%d", rc
);
1178 /* find the vaild cylinder size */
1179 if (private->rdc_data
.no_cyl
== LV_COMPAT_CYL
&&
1180 private->rdc_data
.long_no_cyl
)
1181 private->real_cyl
= private->rdc_data
.long_no_cyl
;
1183 private->real_cyl
= private->rdc_data
.no_cyl
;
1185 dev_info(&device
->cdev
->dev
, "New DASD %04X/%02X (CU %04X/%02X) "
1186 "with %d cylinders, %d heads, %d sectors\n",
1187 private->rdc_data
.dev_type
,
1188 private->rdc_data
.dev_model
,
1189 private->rdc_data
.cu_type
,
1190 private->rdc_data
.cu_model
.model
,
1192 private->rdc_data
.trk_per_cyl
,
1193 private->rdc_data
.sec_per_trk
);
1197 dasd_alias_disconnect_device_from_lcu(device
);
1199 dasd_free_block(device
->block
);
1200 device
->block
= NULL
;
1202 kfree(private->conf_data
);
1203 kfree(device
->private);
1204 device
->private = NULL
;
1208 static void dasd_eckd_uncheck_device(struct dasd_device
*device
)
1210 struct dasd_eckd_private
*private;
1212 private = (struct dasd_eckd_private
*) device
->private;
1213 dasd_alias_disconnect_device_from_lcu(device
);
1214 private->ned
= NULL
;
1215 private->sneq
= NULL
;
1216 private->vdsneq
= NULL
;
1217 private->gneq
= NULL
;
1218 private->conf_len
= 0;
1219 kfree(private->conf_data
);
1220 private->conf_data
= NULL
;
1223 static struct dasd_ccw_req
*
1224 dasd_eckd_analysis_ccw(struct dasd_device
*device
)
1226 struct dasd_eckd_private
*private;
1227 struct eckd_count
*count_data
;
1228 struct LO_eckd_data
*LO_data
;
1229 struct dasd_ccw_req
*cqr
;
1231 int cplength
, datasize
;
1234 private = (struct dasd_eckd_private
*) device
->private;
1237 datasize
= sizeof(struct DE_eckd_data
) + 2*sizeof(struct LO_eckd_data
);
1238 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, cplength
, datasize
, device
);
1242 /* Define extent for the first 3 tracks. */
1243 define_extent(ccw
++, cqr
->data
, 0, 2,
1244 DASD_ECKD_CCW_READ_COUNT
, device
);
1245 LO_data
= cqr
->data
+ sizeof(struct DE_eckd_data
);
1246 /* Locate record for the first 4 records on track 0. */
1247 ccw
[-1].flags
|= CCW_FLAG_CC
;
1248 locate_record(ccw
++, LO_data
++, 0, 0, 4,
1249 DASD_ECKD_CCW_READ_COUNT
, device
, 0);
1251 count_data
= private->count_area
;
1252 for (i
= 0; i
< 4; i
++) {
1253 ccw
[-1].flags
|= CCW_FLAG_CC
;
1254 ccw
->cmd_code
= DASD_ECKD_CCW_READ_COUNT
;
1257 ccw
->cda
= (__u32
)(addr_t
) count_data
;
1262 /* Locate record for the first record on track 2. */
1263 ccw
[-1].flags
|= CCW_FLAG_CC
;
1264 locate_record(ccw
++, LO_data
++, 2, 0, 1,
1265 DASD_ECKD_CCW_READ_COUNT
, device
, 0);
1266 /* Read count ccw. */
1267 ccw
[-1].flags
|= CCW_FLAG_CC
;
1268 ccw
->cmd_code
= DASD_ECKD_CCW_READ_COUNT
;
1271 ccw
->cda
= (__u32
)(addr_t
) count_data
;
1274 cqr
->startdev
= device
;
1275 cqr
->memdev
= device
;
1277 cqr
->buildclk
= get_clock();
1278 cqr
->status
= DASD_CQR_FILLED
;
1282 /* differentiate between 'no record found' and any other error */
1283 static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req
*init_cqr
)
1286 if (init_cqr
->status
== DASD_CQR_DONE
)
1288 else if (init_cqr
->status
== DASD_CQR_NEED_ERP
||
1289 init_cqr
->status
== DASD_CQR_FAILED
) {
1290 sense
= dasd_get_sense(&init_cqr
->irb
);
1291 if (sense
&& (sense
[1] & SNS1_NO_REC_FOUND
))
1292 return INIT_CQR_UNFORMATTED
;
1294 return INIT_CQR_ERROR
;
1296 return INIT_CQR_ERROR
;
1300 * This is the callback function for the init_analysis cqr. It saves
1301 * the status of the initial analysis ccw before it frees it and kicks
1302 * the device to continue the startup sequence. This will call
1303 * dasd_eckd_do_analysis again (if the devices has not been marked
1304 * for deletion in the meantime).
1306 static void dasd_eckd_analysis_callback(struct dasd_ccw_req
*init_cqr
,
1309 struct dasd_eckd_private
*private;
1310 struct dasd_device
*device
;
1312 device
= init_cqr
->startdev
;
1313 private = (struct dasd_eckd_private
*) device
->private;
1314 private->init_cqr_status
= dasd_eckd_analysis_evaluation(init_cqr
);
1315 dasd_sfree_request(init_cqr
, device
);
1316 dasd_kick_device(device
);
1319 static int dasd_eckd_start_analysis(struct dasd_block
*block
)
1321 struct dasd_eckd_private
*private;
1322 struct dasd_ccw_req
*init_cqr
;
1324 private = (struct dasd_eckd_private
*) block
->base
->private;
1325 init_cqr
= dasd_eckd_analysis_ccw(block
->base
);
1326 if (IS_ERR(init_cqr
))
1327 return PTR_ERR(init_cqr
);
1328 init_cqr
->callback
= dasd_eckd_analysis_callback
;
1329 init_cqr
->callback_data
= NULL
;
1330 init_cqr
->expires
= 5*HZ
;
1331 /* first try without ERP, so we can later handle unformatted
1332 * devices as special case
1334 clear_bit(DASD_CQR_FLAGS_USE_ERP
, &init_cqr
->flags
);
1335 init_cqr
->retries
= 0;
1336 dasd_add_request_head(init_cqr
);
1340 static int dasd_eckd_end_analysis(struct dasd_block
*block
)
1342 struct dasd_device
*device
;
1343 struct dasd_eckd_private
*private;
1344 struct eckd_count
*count_area
;
1345 unsigned int sb
, blk_per_trk
;
1347 struct dasd_ccw_req
*init_cqr
;
1349 device
= block
->base
;
1350 private = (struct dasd_eckd_private
*) device
->private;
1351 status
= private->init_cqr_status
;
1352 private->init_cqr_status
= -1;
1353 if (status
== INIT_CQR_ERROR
) {
1354 /* try again, this time with full ERP */
1355 init_cqr
= dasd_eckd_analysis_ccw(device
);
1356 dasd_sleep_on(init_cqr
);
1357 status
= dasd_eckd_analysis_evaluation(init_cqr
);
1358 dasd_sfree_request(init_cqr
, device
);
1361 if (status
== INIT_CQR_UNFORMATTED
) {
1362 dev_warn(&device
->cdev
->dev
, "The DASD is not formatted\n");
1363 return -EMEDIUMTYPE
;
1364 } else if (status
== INIT_CQR_ERROR
) {
1365 dev_err(&device
->cdev
->dev
,
1366 "Detecting the DASD disk layout failed because "
1367 "of an I/O error\n");
1371 private->uses_cdl
= 1;
1372 /* Check Track 0 for Compatible Disk Layout */
1374 for (i
= 0; i
< 3; i
++) {
1375 if (private->count_area
[i
].kl
!= 4 ||
1376 private->count_area
[i
].dl
!= dasd_eckd_cdl_reclen(i
) - 4) {
1377 private->uses_cdl
= 0;
1382 count_area
= &private->count_area
[4];
1384 if (private->uses_cdl
== 0) {
1385 for (i
= 0; i
< 5; i
++) {
1386 if ((private->count_area
[i
].kl
!= 0) ||
1387 (private->count_area
[i
].dl
!=
1388 private->count_area
[0].dl
))
1392 count_area
= &private->count_area
[0];
1394 if (private->count_area
[3].record
== 1)
1395 dev_warn(&device
->cdev
->dev
,
1396 "Track 0 has no records following the VTOC\n");
1398 if (count_area
!= NULL
&& count_area
->kl
== 0) {
1399 /* we found notthing violating our disk layout */
1400 if (dasd_check_blocksize(count_area
->dl
) == 0)
1401 block
->bp_block
= count_area
->dl
;
1403 if (block
->bp_block
== 0) {
1404 dev_warn(&device
->cdev
->dev
,
1405 "The disk layout of the DASD is not supported\n");
1406 return -EMEDIUMTYPE
;
1408 block
->s2b_shift
= 0; /* bits to shift 512 to get a block */
1409 for (sb
= 512; sb
< block
->bp_block
; sb
= sb
<< 1)
1412 blk_per_trk
= recs_per_track(&private->rdc_data
, 0, block
->bp_block
);
1413 block
->blocks
= (private->real_cyl
*
1414 private->rdc_data
.trk_per_cyl
*
1417 dev_info(&device
->cdev
->dev
,
1418 "DASD with %d KB/block, %d KB total size, %d KB/track, "
1419 "%s\n", (block
->bp_block
>> 10),
1420 ((private->real_cyl
*
1421 private->rdc_data
.trk_per_cyl
*
1422 blk_per_trk
* (block
->bp_block
>> 9)) >> 1),
1423 ((blk_per_trk
* block
->bp_block
) >> 10),
1425 "compatible disk layout" : "linux disk layout");
1430 static int dasd_eckd_do_analysis(struct dasd_block
*block
)
1432 struct dasd_eckd_private
*private;
1434 private = (struct dasd_eckd_private
*) block
->base
->private;
1435 if (private->init_cqr_status
< 0)
1436 return dasd_eckd_start_analysis(block
);
1438 return dasd_eckd_end_analysis(block
);
1441 static int dasd_eckd_ready_to_online(struct dasd_device
*device
)
1443 return dasd_alias_add_device(device
);
1446 static int dasd_eckd_online_to_ready(struct dasd_device
*device
)
1448 return dasd_alias_remove_device(device
);
1452 dasd_eckd_fill_geometry(struct dasd_block
*block
, struct hd_geometry
*geo
)
1454 struct dasd_eckd_private
*private;
1456 private = (struct dasd_eckd_private
*) block
->base
->private;
1457 if (dasd_check_blocksize(block
->bp_block
) == 0) {
1458 geo
->sectors
= recs_per_track(&private->rdc_data
,
1459 0, block
->bp_block
);
1461 geo
->cylinders
= private->rdc_data
.no_cyl
;
1462 geo
->heads
= private->rdc_data
.trk_per_cyl
;
1466 static struct dasd_ccw_req
*
1467 dasd_eckd_format_device(struct dasd_device
* device
,
1468 struct format_data_t
* fdata
)
1470 struct dasd_eckd_private
*private;
1471 struct dasd_ccw_req
*fcp
;
1472 struct eckd_count
*ect
;
1476 struct ch_t address
;
1477 int cplength
, datasize
;
1482 private = (struct dasd_eckd_private
*) device
->private;
1483 rpt
= recs_per_track(&private->rdc_data
, 0, fdata
->blksize
);
1485 fdata
->start_unit
/ private->rdc_data
.trk_per_cyl
,
1486 fdata
->start_unit
% private->rdc_data
.trk_per_cyl
);
1488 /* Sanity checks. */
1489 if (fdata
->start_unit
>=
1490 (private->real_cyl
* private->rdc_data
.trk_per_cyl
)) {
1491 dev_warn(&device
->cdev
->dev
, "Start track number %d used in "
1492 "formatting is too big\n", fdata
->start_unit
);
1493 return ERR_PTR(-EINVAL
);
1495 if (fdata
->start_unit
> fdata
->stop_unit
) {
1496 dev_warn(&device
->cdev
->dev
, "Start track %d used in "
1497 "formatting exceeds end track\n", fdata
->start_unit
);
1498 return ERR_PTR(-EINVAL
);
1500 if (dasd_check_blocksize(fdata
->blksize
) != 0) {
1501 dev_warn(&device
->cdev
->dev
,
1502 "The DASD cannot be formatted with block size %d\n",
1504 return ERR_PTR(-EINVAL
);
1508 * fdata->intensity is a bit string that tells us what to do:
1509 * Bit 0: write record zero
1510 * Bit 1: write home address, currently not supported
1511 * Bit 2: invalidate tracks
1512 * Bit 3: use OS/390 compatible disk layout (cdl)
1513 * Bit 4: do not allow storage subsystem to modify record zero
1514 * Only some bit combinations do make sense.
1516 if (fdata
->intensity
& 0x10) {
1518 intensity
= fdata
->intensity
& ~0x10;
1521 intensity
= fdata
->intensity
;
1523 switch (intensity
) {
1524 case 0x00: /* Normal format */
1525 case 0x08: /* Normal format, use cdl. */
1527 datasize
= sizeof(struct DE_eckd_data
) +
1528 sizeof(struct LO_eckd_data
) +
1529 rpt
* sizeof(struct eckd_count
);
1531 case 0x01: /* Write record zero and format track. */
1532 case 0x09: /* Write record zero and format track, use cdl. */
1534 datasize
= sizeof(struct DE_eckd_data
) +
1535 sizeof(struct LO_eckd_data
) +
1536 sizeof(struct eckd_count
) +
1537 rpt
* sizeof(struct eckd_count
);
1539 case 0x04: /* Invalidate track. */
1540 case 0x0c: /* Invalidate track, use cdl. */
1542 datasize
= sizeof(struct DE_eckd_data
) +
1543 sizeof(struct LO_eckd_data
) +
1544 sizeof(struct eckd_count
);
1547 dev_warn(&device
->cdev
->dev
, "An I/O control call used "
1548 "incorrect flags 0x%x\n", fdata
->intensity
);
1549 return ERR_PTR(-EINVAL
);
1551 /* Allocate the format ccw request. */
1552 fcp
= dasd_smalloc_request(DASD_ECKD_MAGIC
, cplength
, datasize
, device
);
1559 switch (intensity
& ~0x08) {
1560 case 0x00: /* Normal format. */
1561 define_extent(ccw
++, (struct DE_eckd_data
*) data
,
1562 fdata
->start_unit
, fdata
->start_unit
,
1563 DASD_ECKD_CCW_WRITE_CKD
, device
);
1564 /* grant subsystem permission to format R0 */
1566 ((struct DE_eckd_data
*)data
)->ga_extended
|= 0x04;
1567 data
+= sizeof(struct DE_eckd_data
);
1568 ccw
[-1].flags
|= CCW_FLAG_CC
;
1569 locate_record(ccw
++, (struct LO_eckd_data
*) data
,
1570 fdata
->start_unit
, 0, rpt
,
1571 DASD_ECKD_CCW_WRITE_CKD
, device
,
1573 data
+= sizeof(struct LO_eckd_data
);
1575 case 0x01: /* Write record zero + format track. */
1576 define_extent(ccw
++, (struct DE_eckd_data
*) data
,
1577 fdata
->start_unit
, fdata
->start_unit
,
1578 DASD_ECKD_CCW_WRITE_RECORD_ZERO
,
1580 data
+= sizeof(struct DE_eckd_data
);
1581 ccw
[-1].flags
|= CCW_FLAG_CC
;
1582 locate_record(ccw
++, (struct LO_eckd_data
*) data
,
1583 fdata
->start_unit
, 0, rpt
+ 1,
1584 DASD_ECKD_CCW_WRITE_RECORD_ZERO
, device
,
1585 device
->block
->bp_block
);
1586 data
+= sizeof(struct LO_eckd_data
);
1588 case 0x04: /* Invalidate track. */
1589 define_extent(ccw
++, (struct DE_eckd_data
*) data
,
1590 fdata
->start_unit
, fdata
->start_unit
,
1591 DASD_ECKD_CCW_WRITE_CKD
, device
);
1592 data
+= sizeof(struct DE_eckd_data
);
1593 ccw
[-1].flags
|= CCW_FLAG_CC
;
1594 locate_record(ccw
++, (struct LO_eckd_data
*) data
,
1595 fdata
->start_unit
, 0, 1,
1596 DASD_ECKD_CCW_WRITE_CKD
, device
, 8);
1597 data
+= sizeof(struct LO_eckd_data
);
1600 if (intensity
& 0x01) { /* write record zero */
1601 ect
= (struct eckd_count
*) data
;
1602 data
+= sizeof(struct eckd_count
);
1603 ect
->cyl
= address
.cyl
;
1604 ect
->head
= address
.head
;
1608 ccw
[-1].flags
|= CCW_FLAG_CC
;
1609 ccw
->cmd_code
= DASD_ECKD_CCW_WRITE_RECORD_ZERO
;
1610 ccw
->flags
= CCW_FLAG_SLI
;
1612 ccw
->cda
= (__u32
)(addr_t
) ect
;
1615 if ((intensity
& ~0x08) & 0x04) { /* erase track */
1616 ect
= (struct eckd_count
*) data
;
1617 data
+= sizeof(struct eckd_count
);
1618 ect
->cyl
= address
.cyl
;
1619 ect
->head
= address
.head
;
1623 ccw
[-1].flags
|= CCW_FLAG_CC
;
1624 ccw
->cmd_code
= DASD_ECKD_CCW_WRITE_CKD
;
1625 ccw
->flags
= CCW_FLAG_SLI
;
1627 ccw
->cda
= (__u32
)(addr_t
) ect
;
1628 } else { /* write remaining records */
1629 for (i
= 0; i
< rpt
; i
++) {
1630 ect
= (struct eckd_count
*) data
;
1631 data
+= sizeof(struct eckd_count
);
1632 ect
->cyl
= address
.cyl
;
1633 ect
->head
= address
.head
;
1634 ect
->record
= i
+ 1;
1636 ect
->dl
= fdata
->blksize
;
1637 /* Check for special tracks 0-1 when formatting CDL */
1638 if ((intensity
& 0x08) &&
1639 fdata
->start_unit
== 0) {
1642 ect
->dl
= sizes_trk0
[i
] - 4;
1645 if ((intensity
& 0x08) &&
1646 fdata
->start_unit
== 1) {
1648 ect
->dl
= LABEL_SIZE
- 44;
1650 ccw
[-1].flags
|= CCW_FLAG_CC
;
1651 ccw
->cmd_code
= DASD_ECKD_CCW_WRITE_CKD
;
1652 ccw
->flags
= CCW_FLAG_SLI
;
1654 ccw
->cda
= (__u32
)(addr_t
) ect
;
1658 fcp
->startdev
= device
;
1659 fcp
->memdev
= device
;
1661 fcp
->buildclk
= get_clock();
1662 fcp
->status
= DASD_CQR_FILLED
;
1666 static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req
*cqr
)
1668 cqr
->status
= DASD_CQR_FILLED
;
1669 if (cqr
->block
&& (cqr
->startdev
!= cqr
->block
->base
)) {
1670 dasd_eckd_reset_ccw_to_base_io(cqr
);
1671 cqr
->startdev
= cqr
->block
->base
;
1675 static dasd_erp_fn_t
1676 dasd_eckd_erp_action(struct dasd_ccw_req
* cqr
)
1678 struct dasd_device
*device
= (struct dasd_device
*) cqr
->startdev
;
1679 struct ccw_device
*cdev
= device
->cdev
;
1681 switch (cdev
->id
.cu_type
) {
1686 return dasd_3990_erp_action
;
1690 return dasd_default_erp_action
;
1694 static dasd_erp_fn_t
1695 dasd_eckd_erp_postaction(struct dasd_ccw_req
* cqr
)
1697 return dasd_default_erp_postaction
;
1701 static void dasd_eckd_handle_unsolicited_interrupt(struct dasd_device
*device
,
1707 /* first of all check for state change pending interrupt */
1708 mask
= DEV_STAT_ATTENTION
| DEV_STAT_DEV_END
| DEV_STAT_UNIT_EXCEP
;
1709 if ((scsw_dstat(&irb
->scsw
) & mask
) == mask
) {
1710 dasd_generic_handle_state_change(device
);
1714 /* summary unit check */
1715 if ((scsw_dstat(&irb
->scsw
) & DEV_STAT_UNIT_CHECK
) &&
1716 (irb
->ecw
[7] == 0x0D)) {
1717 dasd_alias_handle_summary_unit_check(device
, irb
);
1721 sense
= dasd_get_sense(irb
);
1722 /* service information message SIM */
1723 if (sense
&& !(sense
[27] & DASD_SENSE_BIT_0
) &&
1724 ((sense
[6] & DASD_SIM_SENSE
) == DASD_SIM_SENSE
)) {
1725 dasd_3990_erp_handle_sim(device
, sense
);
1726 dasd_schedule_device_bh(device
);
1730 if ((scsw_cc(&irb
->scsw
) == 1) &&
1731 (scsw_fctl(&irb
->scsw
) & SCSW_FCTL_START_FUNC
) &&
1732 (scsw_actl(&irb
->scsw
) & SCSW_ACTL_START_PEND
) &&
1733 (scsw_stctl(&irb
->scsw
) & SCSW_STCTL_STATUS_PEND
)) {
1734 /* fake irb do nothing, they are handled elsewhere */
1735 dasd_schedule_device_bh(device
);
1740 /* just report other unsolicited interrupts */
1741 DBF_DEV_EVENT(DBF_ERR
, device
, "%s",
1742 "unsolicited interrupt received");
1744 DBF_DEV_EVENT(DBF_ERR
, device
, "%s",
1745 "unsolicited interrupt received "
1746 "(sense available)");
1747 device
->discipline
->dump_sense_dbf(device
, irb
, "unsolicited");
1750 dasd_schedule_device_bh(device
);
1755 static struct dasd_ccw_req
*dasd_eckd_build_cp_cmd_single(
1756 struct dasd_device
*startdev
,
1757 struct dasd_block
*block
,
1758 struct request
*req
,
1763 unsigned int first_offs
,
1764 unsigned int last_offs
,
1765 unsigned int blk_per_trk
,
1766 unsigned int blksize
)
1768 struct dasd_eckd_private
*private;
1769 unsigned long *idaws
;
1770 struct LO_eckd_data
*LO_data
;
1771 struct dasd_ccw_req
*cqr
;
1773 struct req_iterator iter
;
1777 int count
, cidaw
, cplength
, datasize
;
1779 unsigned char cmd
, rcmd
;
1781 struct dasd_device
*basedev
;
1783 basedev
= block
->base
;
1784 private = (struct dasd_eckd_private
*) basedev
->private;
1785 if (rq_data_dir(req
) == READ
)
1786 cmd
= DASD_ECKD_CCW_READ_MT
;
1787 else if (rq_data_dir(req
) == WRITE
)
1788 cmd
= DASD_ECKD_CCW_WRITE_MT
;
1790 return ERR_PTR(-EINVAL
);
1792 /* Check struct bio and count the number of blocks for the request. */
1795 rq_for_each_segment(bv
, req
, iter
) {
1796 if (bv
->bv_len
& (blksize
- 1))
1797 /* Eckd can only do full blocks. */
1798 return ERR_PTR(-EINVAL
);
1799 count
+= bv
->bv_len
>> (block
->s2b_shift
+ 9);
1800 #if defined(CONFIG_64BIT)
1801 if (idal_is_needed (page_address(bv
->bv_page
), bv
->bv_len
))
1802 cidaw
+= bv
->bv_len
>> (block
->s2b_shift
+ 9);
1806 if (count
!= last_rec
- first_rec
+ 1)
1807 return ERR_PTR(-EINVAL
);
1809 /* use the prefix command if available */
1810 use_prefix
= private->features
.feature
[8] & 0x01;
1812 /* 1x prefix + number of blocks */
1813 cplength
= 2 + count
;
1814 /* 1x prefix + cidaws*sizeof(long) */
1815 datasize
= sizeof(struct PFX_eckd_data
) +
1816 sizeof(struct LO_eckd_data
) +
1817 cidaw
* sizeof(unsigned long);
1819 /* 1x define extent + 1x locate record + number of blocks */
1820 cplength
= 2 + count
;
1821 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */
1822 datasize
= sizeof(struct DE_eckd_data
) +
1823 sizeof(struct LO_eckd_data
) +
1824 cidaw
* sizeof(unsigned long);
1826 /* Find out the number of additional locate record ccws for cdl. */
1827 if (private->uses_cdl
&& first_rec
< 2*blk_per_trk
) {
1828 if (last_rec
>= 2*blk_per_trk
)
1829 count
= 2*blk_per_trk
- first_rec
;
1831 datasize
+= count
*sizeof(struct LO_eckd_data
);
1833 /* Allocate the ccw request. */
1834 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, cplength
, datasize
,
1839 /* First ccw is define extent or prefix. */
1841 if (prefix(ccw
++, cqr
->data
, first_trk
,
1842 last_trk
, cmd
, basedev
, startdev
) == -EAGAIN
) {
1843 /* Clock not in sync and XRC is enabled.
1846 dasd_sfree_request(cqr
, startdev
);
1847 return ERR_PTR(-EAGAIN
);
1849 idaws
= (unsigned long *) (cqr
->data
+
1850 sizeof(struct PFX_eckd_data
));
1852 if (define_extent(ccw
++, cqr
->data
, first_trk
,
1853 last_trk
, cmd
, startdev
) == -EAGAIN
) {
1854 /* Clock not in sync and XRC is enabled.
1857 dasd_sfree_request(cqr
, startdev
);
1858 return ERR_PTR(-EAGAIN
);
1860 idaws
= (unsigned long *) (cqr
->data
+
1861 sizeof(struct DE_eckd_data
));
1863 /* Build locate_record+read/write/ccws. */
1864 LO_data
= (struct LO_eckd_data
*) (idaws
+ cidaw
);
1866 if (private->uses_cdl
== 0 || recid
> 2*blk_per_trk
) {
1867 /* Only standard blocks so there is just one locate record. */
1868 ccw
[-1].flags
|= CCW_FLAG_CC
;
1869 locate_record(ccw
++, LO_data
++, first_trk
, first_offs
+ 1,
1870 last_rec
- recid
+ 1, cmd
, basedev
, blksize
);
1872 rq_for_each_segment(bv
, req
, iter
) {
1873 dst
= page_address(bv
->bv_page
) + bv
->bv_offset
;
1874 if (dasd_page_cache
) {
1875 char *copy
= kmem_cache_alloc(dasd_page_cache
,
1876 GFP_DMA
| __GFP_NOWARN
);
1877 if (copy
&& rq_data_dir(req
) == WRITE
)
1878 memcpy(copy
+ bv
->bv_offset
, dst
, bv
->bv_len
);
1880 dst
= copy
+ bv
->bv_offset
;
1882 for (off
= 0; off
< bv
->bv_len
; off
+= blksize
) {
1883 sector_t trkid
= recid
;
1884 unsigned int recoffs
= sector_div(trkid
, blk_per_trk
);
1887 /* Locate record for cdl special block ? */
1888 if (private->uses_cdl
&& recid
< 2*blk_per_trk
) {
1889 if (dasd_eckd_cdl_special(blk_per_trk
, recid
)){
1891 count
= dasd_eckd_cdl_reclen(recid
);
1892 if (count
< blksize
&&
1893 rq_data_dir(req
) == READ
)
1894 memset(dst
+ count
, 0xe5,
1897 ccw
[-1].flags
|= CCW_FLAG_CC
;
1898 locate_record(ccw
++, LO_data
++,
1900 1, rcmd
, basedev
, count
);
1902 /* Locate record for standard blocks ? */
1903 if (private->uses_cdl
&& recid
== 2*blk_per_trk
) {
1904 ccw
[-1].flags
|= CCW_FLAG_CC
;
1905 locate_record(ccw
++, LO_data
++,
1907 last_rec
- recid
+ 1,
1908 cmd
, basedev
, count
);
1910 /* Read/write ccw. */
1911 ccw
[-1].flags
|= CCW_FLAG_CC
;
1912 ccw
->cmd_code
= rcmd
;
1914 if (idal_is_needed(dst
, blksize
)) {
1915 ccw
->cda
= (__u32
)(addr_t
) idaws
;
1916 ccw
->flags
= CCW_FLAG_IDA
;
1917 idaws
= idal_create_words(idaws
, dst
, blksize
);
1919 ccw
->cda
= (__u32
)(addr_t
) dst
;
1927 if (blk_noretry_request(req
) ||
1928 block
->base
->features
& DASD_FEATURE_FAILFAST
)
1929 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
1930 cqr
->startdev
= startdev
;
1931 cqr
->memdev
= startdev
;
1933 cqr
->expires
= 5 * 60 * HZ
; /* 5 minutes */
1934 cqr
->lpm
= private->path_data
.ppm
;
1936 cqr
->buildclk
= get_clock();
1937 cqr
->status
= DASD_CQR_FILLED
;
1941 static struct dasd_ccw_req
*dasd_eckd_build_cp_cmd_track(
1942 struct dasd_device
*startdev
,
1943 struct dasd_block
*block
,
1944 struct request
*req
,
1949 unsigned int first_offs
,
1950 unsigned int last_offs
,
1951 unsigned int blk_per_trk
,
1952 unsigned int blksize
)
1954 struct dasd_eckd_private
*private;
1955 unsigned long *idaws
;
1956 struct dasd_ccw_req
*cqr
;
1958 struct req_iterator iter
;
1960 char *dst
, *idaw_dst
;
1961 unsigned int cidaw
, cplength
, datasize
;
1965 struct dasd_device
*basedev
;
1966 unsigned int trkcount
, count
, count_to_trk_end
;
1967 unsigned int idaw_len
, seg_len
, part_len
, len_to_track_end
;
1968 unsigned char new_track
, end_idaw
;
1970 unsigned int recoffs
;
1972 basedev
= block
->base
;
1973 private = (struct dasd_eckd_private
*) basedev
->private;
1974 if (rq_data_dir(req
) == READ
)
1975 cmd
= DASD_ECKD_CCW_READ_TRACK_DATA
;
1976 else if (rq_data_dir(req
) == WRITE
)
1977 cmd
= DASD_ECKD_CCW_WRITE_TRACK_DATA
;
1979 return ERR_PTR(-EINVAL
);
1981 /* Track based I/O needs IDAWs for each page, and not just for
1982 * 64 bit addresses. We need additional idals for pages
1983 * that get filled from two tracks, so we use the number
1984 * of records as upper limit.
1986 cidaw
= last_rec
- first_rec
+ 1;
1987 trkcount
= last_trk
- first_trk
+ 1;
1989 /* 1x prefix + one read/write ccw per track */
1990 cplength
= 1 + trkcount
;
1992 /* on 31-bit we need space for two 32 bit addresses per page
1993 * on 64-bit one 64 bit address
1995 datasize
= sizeof(struct PFX_eckd_data
) +
1996 cidaw
* sizeof(unsigned long long);
1998 /* Allocate the ccw request. */
1999 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, cplength
, datasize
,
2004 /* transfer length factor: how many bytes to read from the last track */
2005 if (first_trk
== last_trk
)
2006 tlf
= last_offs
- first_offs
+ 1;
2008 tlf
= last_offs
+ 1;
2011 if (prefix_LRE(ccw
++, cqr
->data
, first_trk
,
2012 last_trk
, cmd
, basedev
, startdev
,
2013 1 /* format */, first_offs
+ 1,
2016 /* Clock not in sync and XRC is enabled.
2019 dasd_sfree_request(cqr
, startdev
);
2020 return ERR_PTR(-EAGAIN
);
2024 * The translation of request into ccw programs must meet the
2025 * following conditions:
2026 * - all idaws but the first and the last must address full pages
2027 * (or 2K blocks on 31-bit)
2028 * - the scope of a ccw and it's idal ends with the track boundaries
2030 idaws
= (unsigned long *) (cqr
->data
+ sizeof(struct PFX_eckd_data
));
2034 len_to_track_end
= 0;
2037 rq_for_each_segment(bv
, req
, iter
) {
2038 dst
= page_address(bv
->bv_page
) + bv
->bv_offset
;
2039 seg_len
= bv
->bv_len
;
2043 recoffs
= sector_div(trkid
, blk_per_trk
);
2044 count_to_trk_end
= blk_per_trk
- recoffs
;
2045 count
= min((last_rec
- recid
+ 1),
2046 (sector_t
)count_to_trk_end
);
2047 len_to_track_end
= count
* blksize
;
2048 ccw
[-1].flags
|= CCW_FLAG_CC
;
2049 ccw
->cmd_code
= cmd
;
2050 ccw
->count
= len_to_track_end
;
2051 ccw
->cda
= (__u32
)(addr_t
)idaws
;
2052 ccw
->flags
= CCW_FLAG_IDA
;
2056 /* first idaw for a ccw may start anywhere */
2060 /* If we start a new idaw, we must make sure that it
2061 * starts on an IDA_BLOCK_SIZE boundary.
2062 * If we continue an idaw, we must make sure that the
2063 * current segment begins where the so far accumulated
2067 if (__pa(dst
) & (IDA_BLOCK_SIZE
-1)) {
2068 dasd_sfree_request(cqr
, startdev
);
2069 return ERR_PTR(-ERANGE
);
2073 if ((idaw_dst
+ idaw_len
) != dst
) {
2074 dasd_sfree_request(cqr
, startdev
);
2075 return ERR_PTR(-ERANGE
);
2077 part_len
= min(seg_len
, len_to_track_end
);
2078 seg_len
-= part_len
;
2080 idaw_len
+= part_len
;
2081 len_to_track_end
-= part_len
;
2082 /* collected memory area ends on an IDA_BLOCK border,
2084 * idal_create_words will handle cases where idaw_len
2085 * is larger then IDA_BLOCK_SIZE
2087 if (!(__pa(idaw_dst
+ idaw_len
) & (IDA_BLOCK_SIZE
-1)))
2089 /* We also need to end the idaw at track end */
2090 if (!len_to_track_end
) {
2095 idaws
= idal_create_words(idaws
, idaw_dst
,
2104 if (blk_noretry_request(req
) ||
2105 block
->base
->features
& DASD_FEATURE_FAILFAST
)
2106 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
2107 cqr
->startdev
= startdev
;
2108 cqr
->memdev
= startdev
;
2110 cqr
->expires
= 5 * 60 * HZ
; /* 5 minutes */
2111 cqr
->lpm
= private->path_data
.ppm
;
2113 cqr
->buildclk
= get_clock();
2114 cqr
->status
= DASD_CQR_FILLED
;
2118 static int prepare_itcw(struct itcw
*itcw
,
2119 unsigned int trk
, unsigned int totrk
, int cmd
,
2120 struct dasd_device
*basedev
,
2121 struct dasd_device
*startdev
,
2122 unsigned int rec_on_trk
, int count
,
2123 unsigned int blksize
,
2124 unsigned int total_data_size
,
2126 unsigned int blk_per_trk
)
2128 struct PFX_eckd_data pfxdata
;
2129 struct dasd_eckd_private
*basepriv
, *startpriv
;
2130 struct DE_eckd_data
*dedata
;
2131 struct LRE_eckd_data
*lredata
;
2135 u16 heads
, beghead
, endhead
;
2143 /* setup prefix data */
2144 basepriv
= (struct dasd_eckd_private
*) basedev
->private;
2145 startpriv
= (struct dasd_eckd_private
*) startdev
->private;
2146 dedata
= &pfxdata
.define_extent
;
2147 lredata
= &pfxdata
.locate_record
;
2149 memset(&pfxdata
, 0, sizeof(pfxdata
));
2150 pfxdata
.format
= 1; /* PFX with LRE */
2151 pfxdata
.base_address
= basepriv
->ned
->unit_addr
;
2152 pfxdata
.base_lss
= basepriv
->ned
->ID
;
2153 pfxdata
.validity
.define_extent
= 1;
2155 /* private uid is kept up to date, conf_data may be outdated */
2156 if (startpriv
->uid
.type
!= UA_BASE_DEVICE
) {
2157 pfxdata
.validity
.verify_base
= 1;
2158 if (startpriv
->uid
.type
== UA_HYPER_PAV_ALIAS
)
2159 pfxdata
.validity
.hyper_pav
= 1;
2163 case DASD_ECKD_CCW_READ_TRACK_DATA
:
2164 dedata
->mask
.perm
= 0x1;
2165 dedata
->attributes
.operation
= basepriv
->attrib
.operation
;
2166 dedata
->blk_size
= blksize
;
2167 dedata
->ga_extended
|= 0x42;
2168 lredata
->operation
.orientation
= 0x0;
2169 lredata
->operation
.operation
= 0x0C;
2170 lredata
->auxiliary
.check_bytes
= 0x01;
2171 pfx_cmd
= DASD_ECKD_CCW_PFX_READ
;
2173 case DASD_ECKD_CCW_WRITE_TRACK_DATA
:
2174 dedata
->mask
.perm
= 0x02;
2175 dedata
->attributes
.operation
= basepriv
->attrib
.operation
;
2176 dedata
->blk_size
= blksize
;
2177 rc
= check_XRC_on_prefix(&pfxdata
, basedev
);
2178 dedata
->ga_extended
|= 0x42;
2179 lredata
->operation
.orientation
= 0x0;
2180 lredata
->operation
.operation
= 0x3F;
2181 lredata
->extended_operation
= 0x23;
2182 lredata
->auxiliary
.check_bytes
= 0x2;
2183 pfx_cmd
= DASD_ECKD_CCW_PFX
;
2186 DBF_DEV_EVENT(DBF_ERR
, basedev
,
2187 "prepare itcw, unknown opcode 0x%x", cmd
);
2194 dedata
->attributes
.mode
= 0x3; /* ECKD */
2196 heads
= basepriv
->rdc_data
.trk_per_cyl
;
2197 begcyl
= trk
/ heads
;
2198 beghead
= trk
% heads
;
2199 endcyl
= totrk
/ heads
;
2200 endhead
= totrk
% heads
;
2202 /* check for sequential prestage - enhance cylinder range */
2203 if (dedata
->attributes
.operation
== DASD_SEQ_PRESTAGE
||
2204 dedata
->attributes
.operation
== DASD_SEQ_ACCESS
) {
2206 if (endcyl
+ basepriv
->attrib
.nr_cyl
< basepriv
->real_cyl
)
2207 endcyl
+= basepriv
->attrib
.nr_cyl
;
2209 endcyl
= (basepriv
->real_cyl
- 1);
2212 set_ch_t(&dedata
->beg_ext
, begcyl
, beghead
);
2213 set_ch_t(&dedata
->end_ext
, endcyl
, endhead
);
2215 dedata
->ep_format
= 0x20; /* records per track is valid */
2216 dedata
->ep_rec_per_track
= blk_per_trk
;
2219 switch (basepriv
->rdc_data
.dev_type
) {
2221 dn
= ceil_quot(blksize
+ 6, 232);
2222 d
= 9 + ceil_quot(blksize
+ 6 * (dn
+ 1), 34);
2223 sector
= (49 + (rec_on_trk
- 1) * (10 + d
)) / 8;
2226 d
= 7 + ceil_quot(blksize
+ 12, 32);
2227 sector
= (39 + (rec_on_trk
- 1) * (8 + d
)) / 7;
2232 lredata
->auxiliary
.length_valid
= 1;
2233 lredata
->auxiliary
.length_scope
= 1;
2234 lredata
->auxiliary
.imbedded_ccw_valid
= 1;
2235 lredata
->length
= tlf
;
2236 lredata
->imbedded_ccw
= cmd
;
2237 lredata
->count
= count
;
2238 lredata
->sector
= sector
;
2239 set_ch_t(&lredata
->seek_addr
, begcyl
, beghead
);
2240 lredata
->search_arg
.cyl
= lredata
->seek_addr
.cyl
;
2241 lredata
->search_arg
.head
= lredata
->seek_addr
.head
;
2242 lredata
->search_arg
.record
= rec_on_trk
;
2244 dcw
= itcw_add_dcw(itcw
, pfx_cmd
, 0,
2245 &pfxdata
, sizeof(pfxdata
), total_data_size
);
2250 static struct dasd_ccw_req
*dasd_eckd_build_cp_tpm_track(
2251 struct dasd_device
*startdev
,
2252 struct dasd_block
*block
,
2253 struct request
*req
,
2258 unsigned int first_offs
,
2259 unsigned int last_offs
,
2260 unsigned int blk_per_trk
,
2261 unsigned int blksize
)
2263 struct dasd_eckd_private
*private;
2264 struct dasd_ccw_req
*cqr
;
2265 struct req_iterator iter
;
2268 unsigned int trkcount
, ctidaw
;
2270 struct dasd_device
*basedev
;
2273 struct tidaw
*last_tidaw
= NULL
;
2277 basedev
= block
->base
;
2278 private = (struct dasd_eckd_private
*) basedev
->private;
2279 if (rq_data_dir(req
) == READ
) {
2280 cmd
= DASD_ECKD_CCW_READ_TRACK_DATA
;
2281 itcw_op
= ITCW_OP_READ
;
2282 } else if (rq_data_dir(req
) == WRITE
) {
2283 cmd
= DASD_ECKD_CCW_WRITE_TRACK_DATA
;
2284 itcw_op
= ITCW_OP_WRITE
;
2286 return ERR_PTR(-EINVAL
);
2288 /* trackbased I/O needs address all memory via TIDAWs,
2289 * not just for 64 bit addresses. This allows us to map
2290 * each segment directly to one tidaw.
2292 trkcount
= last_trk
- first_trk
+ 1;
2294 rq_for_each_segment(bv
, req
, iter
) {
2298 /* Allocate the ccw request. */
2299 itcw_size
= itcw_calc_size(0, ctidaw
, 0);
2300 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 0, itcw_size
, startdev
);
2305 cqr
->startdev
= startdev
;
2306 cqr
->memdev
= startdev
;
2308 cqr
->expires
= 100*HZ
;
2309 cqr
->buildclk
= get_clock();
2310 cqr
->status
= DASD_CQR_FILLED
;
2313 /* transfer length factor: how many bytes to read from the last track */
2314 if (first_trk
== last_trk
)
2315 tlf
= last_offs
- first_offs
+ 1;
2317 tlf
= last_offs
+ 1;
2320 itcw
= itcw_init(cqr
->data
, itcw_size
, itcw_op
, 0, ctidaw
, 0);
2321 cqr
->cpaddr
= itcw_get_tcw(itcw
);
2323 if (prepare_itcw(itcw
, first_trk
, last_trk
,
2324 cmd
, basedev
, startdev
,
2327 (last_rec
- first_rec
+ 1) * blksize
,
2328 tlf
, blk_per_trk
) == -EAGAIN
) {
2329 /* Clock not in sync and XRC is enabled.
2332 dasd_sfree_request(cqr
, startdev
);
2333 return ERR_PTR(-EAGAIN
);
2337 * A tidaw can address 4k of memory, but must not cross page boundaries
2338 * We can let the block layer handle this by setting
2339 * blk_queue_segment_boundary to page boundaries and
2340 * blk_max_segment_size to page size when setting up the request queue.
2342 rq_for_each_segment(bv
, req
, iter
) {
2343 dst
= page_address(bv
->bv_page
) + bv
->bv_offset
;
2344 last_tidaw
= itcw_add_tidaw(itcw
, 0x00, dst
, bv
->bv_len
);
2345 if (IS_ERR(last_tidaw
))
2346 return (struct dasd_ccw_req
*)last_tidaw
;
2349 last_tidaw
->flags
|= 0x80;
2350 itcw_finalize(itcw
);
2352 if (blk_noretry_request(req
) ||
2353 block
->base
->features
& DASD_FEATURE_FAILFAST
)
2354 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
2355 cqr
->startdev
= startdev
;
2356 cqr
->memdev
= startdev
;
2358 cqr
->expires
= 5 * 60 * HZ
; /* 5 minutes */
2359 cqr
->lpm
= private->path_data
.ppm
;
2361 cqr
->buildclk
= get_clock();
2362 cqr
->status
= DASD_CQR_FILLED
;
2366 static struct dasd_ccw_req
*dasd_eckd_build_cp(struct dasd_device
*startdev
,
2367 struct dasd_block
*block
,
2368 struct request
*req
)
2370 int tpm
, cmdrtd
, cmdwtd
;
2372 #if defined(CONFIG_64BIT)
2373 int fcx_in_css
, fcx_in_gneq
, fcx_in_features
;
2375 struct dasd_eckd_private
*private;
2376 struct dasd_device
*basedev
;
2377 sector_t first_rec
, last_rec
;
2378 sector_t first_trk
, last_trk
;
2379 unsigned int first_offs
, last_offs
;
2380 unsigned int blk_per_trk
, blksize
;
2382 struct dasd_ccw_req
*cqr
;
2384 basedev
= block
->base
;
2385 private = (struct dasd_eckd_private
*) basedev
->private;
2387 /* Calculate number of blocks/records per track. */
2388 blksize
= block
->bp_block
;
2389 blk_per_trk
= recs_per_track(&private->rdc_data
, 0, blksize
);
2390 if (blk_per_trk
== 0)
2391 return ERR_PTR(-EINVAL
);
2392 /* Calculate record id of first and last block. */
2393 first_rec
= first_trk
= blk_rq_pos(req
) >> block
->s2b_shift
;
2394 first_offs
= sector_div(first_trk
, blk_per_trk
);
2395 last_rec
= last_trk
=
2396 (blk_rq_pos(req
) + blk_rq_sectors(req
) - 1) >> block
->s2b_shift
;
2397 last_offs
= sector_div(last_trk
, blk_per_trk
);
2398 cdlspecial
= (private->uses_cdl
&& first_rec
< 2*blk_per_trk
);
2400 /* is transport mode supported? */
2401 #if defined(CONFIG_64BIT)
2402 fcx_in_css
= css_general_characteristics
.fcx
;
2403 fcx_in_gneq
= private->gneq
->reserved2
[7] & 0x04;
2404 fcx_in_features
= private->features
.feature
[40] & 0x80;
2405 tpm
= fcx_in_css
&& fcx_in_gneq
&& fcx_in_features
;
2410 /* is read track data and write track data in command mode supported? */
2411 cmdrtd
= private->features
.feature
[9] & 0x20;
2412 cmdwtd
= private->features
.feature
[12] & 0x40;
2413 use_prefix
= private->features
.feature
[8] & 0x01;
2416 if (cdlspecial
|| dasd_page_cache
) {
2417 /* do nothing, just fall through to the cmd mode single case */
2418 } else if (!dasd_nofcx
&& tpm
&& (first_trk
== last_trk
)) {
2419 cqr
= dasd_eckd_build_cp_tpm_track(startdev
, block
, req
,
2420 first_rec
, last_rec
,
2421 first_trk
, last_trk
,
2422 first_offs
, last_offs
,
2423 blk_per_trk
, blksize
);
2424 if (IS_ERR(cqr
) && PTR_ERR(cqr
) != -EAGAIN
)
2426 } else if (use_prefix
&&
2427 (((rq_data_dir(req
) == READ
) && cmdrtd
) ||
2428 ((rq_data_dir(req
) == WRITE
) && cmdwtd
))) {
2429 cqr
= dasd_eckd_build_cp_cmd_track(startdev
, block
, req
,
2430 first_rec
, last_rec
,
2431 first_trk
, last_trk
,
2432 first_offs
, last_offs
,
2433 blk_per_trk
, blksize
);
2434 if (IS_ERR(cqr
) && PTR_ERR(cqr
) != -EAGAIN
)
2438 cqr
= dasd_eckd_build_cp_cmd_single(startdev
, block
, req
,
2439 first_rec
, last_rec
,
2440 first_trk
, last_trk
,
2441 first_offs
, last_offs
,
2442 blk_per_trk
, blksize
);
2447 dasd_eckd_free_cp(struct dasd_ccw_req
*cqr
, struct request
*req
)
2449 struct dasd_eckd_private
*private;
2451 struct req_iterator iter
;
2454 unsigned int blksize
, blk_per_trk
, off
;
2458 if (!dasd_page_cache
)
2460 private = (struct dasd_eckd_private
*) cqr
->block
->base
->private;
2461 blksize
= cqr
->block
->bp_block
;
2462 blk_per_trk
= recs_per_track(&private->rdc_data
, 0, blksize
);
2463 recid
= blk_rq_pos(req
) >> cqr
->block
->s2b_shift
;
2465 /* Skip over define extent & locate record. */
2467 if (private->uses_cdl
== 0 || recid
> 2*blk_per_trk
)
2469 rq_for_each_segment(bv
, req
, iter
) {
2470 dst
= page_address(bv
->bv_page
) + bv
->bv_offset
;
2471 for (off
= 0; off
< bv
->bv_len
; off
+= blksize
) {
2472 /* Skip locate record. */
2473 if (private->uses_cdl
&& recid
<= 2*blk_per_trk
)
2476 if (ccw
->flags
& CCW_FLAG_IDA
)
2477 cda
= *((char **)((addr_t
) ccw
->cda
));
2479 cda
= (char *)((addr_t
) ccw
->cda
);
2481 if (rq_data_dir(req
) == READ
)
2482 memcpy(dst
, cda
, bv
->bv_len
);
2483 kmem_cache_free(dasd_page_cache
,
2484 (void *)((addr_t
)cda
& PAGE_MASK
));
2493 status
= cqr
->status
== DASD_CQR_DONE
;
2494 dasd_sfree_request(cqr
, cqr
->memdev
);
2499 * Modify ccw/tcw in cqr so it can be started on a base device.
2501 * Note that this is not enough to restart the cqr!
2502 * Either reset cqr->startdev as well (summary unit check handling)
2503 * or restart via separate cqr (as in ERP handling).
2505 void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req
*cqr
)
2508 struct PFX_eckd_data
*pfxdata
;
2513 if (cqr
->cpmode
== 1) {
2515 tccb
= tcw_get_tccb(tcw
);
2516 dcw
= (struct dcw
*)&tccb
->tca
[0];
2517 pfxdata
= (struct PFX_eckd_data
*)&dcw
->cd
[0];
2518 pfxdata
->validity
.verify_base
= 0;
2519 pfxdata
->validity
.hyper_pav
= 0;
2522 pfxdata
= cqr
->data
;
2523 if (ccw
->cmd_code
== DASD_ECKD_CCW_PFX
) {
2524 pfxdata
->validity
.verify_base
= 0;
2525 pfxdata
->validity
.hyper_pav
= 0;
2530 #define DASD_ECKD_CHANQ_MAX_SIZE 4
2532 static struct dasd_ccw_req
*dasd_eckd_build_alias_cp(struct dasd_device
*base
,
2533 struct dasd_block
*block
,
2534 struct request
*req
)
2536 struct dasd_eckd_private
*private;
2537 struct dasd_device
*startdev
;
2538 unsigned long flags
;
2539 struct dasd_ccw_req
*cqr
;
2541 startdev
= dasd_alias_get_start_dev(base
);
2544 private = (struct dasd_eckd_private
*) startdev
->private;
2545 if (private->count
>= DASD_ECKD_CHANQ_MAX_SIZE
)
2546 return ERR_PTR(-EBUSY
);
2548 spin_lock_irqsave(get_ccwdev_lock(startdev
->cdev
), flags
);
2550 cqr
= dasd_eckd_build_cp(startdev
, block
, req
);
2553 spin_unlock_irqrestore(get_ccwdev_lock(startdev
->cdev
), flags
);
2557 static int dasd_eckd_free_alias_cp(struct dasd_ccw_req
*cqr
,
2558 struct request
*req
)
2560 struct dasd_eckd_private
*private;
2561 unsigned long flags
;
2563 spin_lock_irqsave(get_ccwdev_lock(cqr
->memdev
->cdev
), flags
);
2564 private = (struct dasd_eckd_private
*) cqr
->memdev
->private;
2566 spin_unlock_irqrestore(get_ccwdev_lock(cqr
->memdev
->cdev
), flags
);
2567 return dasd_eckd_free_cp(cqr
, req
);
2571 dasd_eckd_fill_info(struct dasd_device
* device
,
2572 struct dasd_information2_t
* info
)
2574 struct dasd_eckd_private
*private;
2576 private = (struct dasd_eckd_private
*) device
->private;
2577 info
->label_block
= 2;
2578 info
->FBA_layout
= private->uses_cdl
? 0 : 1;
2579 info
->format
= private->uses_cdl
? DASD_FORMAT_CDL
: DASD_FORMAT_LDL
;
2580 info
->characteristics_size
= sizeof(struct dasd_eckd_characteristics
);
2581 memcpy(info
->characteristics
, &private->rdc_data
,
2582 sizeof(struct dasd_eckd_characteristics
));
2583 info
->confdata_size
= min((unsigned long)private->conf_len
,
2584 sizeof(info
->configuration_data
));
2585 memcpy(info
->configuration_data
, private->conf_data
,
2586 info
->confdata_size
);
2591 * SECTION: ioctl functions for eckd devices.
2595 * Release device ioctl.
2596 * Buils a channel programm to releases a prior reserved
2597 * (see dasd_eckd_reserve) device.
2600 dasd_eckd_release(struct dasd_device
*device
)
2602 struct dasd_ccw_req
*cqr
;
2606 if (!capable(CAP_SYS_ADMIN
))
2609 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1, 32, device
);
2611 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
2612 "Could not allocate initialization request");
2613 return PTR_ERR(cqr
);
2616 ccw
->cmd_code
= DASD_ECKD_CCW_RELEASE
;
2617 ccw
->flags
|= CCW_FLAG_SLI
;
2619 ccw
->cda
= (__u32
)(addr_t
) cqr
->data
;
2620 cqr
->startdev
= device
;
2621 cqr
->memdev
= device
;
2622 clear_bit(DASD_CQR_FLAGS_USE_ERP
, &cqr
->flags
);
2623 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
2624 cqr
->retries
= 2; /* set retry counter to enable basic ERP */
2625 cqr
->expires
= 2 * HZ
;
2626 cqr
->buildclk
= get_clock();
2627 cqr
->status
= DASD_CQR_FILLED
;
2629 rc
= dasd_sleep_on_immediatly(cqr
);
2631 dasd_sfree_request(cqr
, cqr
->memdev
);
2636 * Reserve device ioctl.
2637 * Options are set to 'synchronous wait for interrupt' and
2638 * 'timeout the request'. This leads to a terminate IO if
2639 * the interrupt is outstanding for a certain time.
2642 dasd_eckd_reserve(struct dasd_device
*device
)
2644 struct dasd_ccw_req
*cqr
;
2648 if (!capable(CAP_SYS_ADMIN
))
2651 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1, 32, device
);
2653 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
2654 "Could not allocate initialization request");
2655 return PTR_ERR(cqr
);
2658 ccw
->cmd_code
= DASD_ECKD_CCW_RESERVE
;
2659 ccw
->flags
|= CCW_FLAG_SLI
;
2661 ccw
->cda
= (__u32
)(addr_t
) cqr
->data
;
2662 cqr
->startdev
= device
;
2663 cqr
->memdev
= device
;
2664 clear_bit(DASD_CQR_FLAGS_USE_ERP
, &cqr
->flags
);
2665 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
2666 cqr
->retries
= 2; /* set retry counter to enable basic ERP */
2667 cqr
->expires
= 2 * HZ
;
2668 cqr
->buildclk
= get_clock();
2669 cqr
->status
= DASD_CQR_FILLED
;
2671 rc
= dasd_sleep_on_immediatly(cqr
);
2673 dasd_sfree_request(cqr
, cqr
->memdev
);
2678 * Steal lock ioctl - unconditional reserve device.
2679 * Buils a channel programm to break a device's reservation.
2680 * (unconditional reserve)
2683 dasd_eckd_steal_lock(struct dasd_device
*device
)
2685 struct dasd_ccw_req
*cqr
;
2689 if (!capable(CAP_SYS_ADMIN
))
2692 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1, 32, device
);
2694 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
2695 "Could not allocate initialization request");
2696 return PTR_ERR(cqr
);
2699 ccw
->cmd_code
= DASD_ECKD_CCW_SLCK
;
2700 ccw
->flags
|= CCW_FLAG_SLI
;
2702 ccw
->cda
= (__u32
)(addr_t
) cqr
->data
;
2703 cqr
->startdev
= device
;
2704 cqr
->memdev
= device
;
2705 clear_bit(DASD_CQR_FLAGS_USE_ERP
, &cqr
->flags
);
2706 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
2707 cqr
->retries
= 2; /* set retry counter to enable basic ERP */
2708 cqr
->expires
= 2 * HZ
;
2709 cqr
->buildclk
= get_clock();
2710 cqr
->status
= DASD_CQR_FILLED
;
2712 rc
= dasd_sleep_on_immediatly(cqr
);
2714 dasd_sfree_request(cqr
, cqr
->memdev
);
2719 * Read performance statistics
2722 dasd_eckd_performance(struct dasd_device
*device
, void __user
*argp
)
2724 struct dasd_psf_prssd_data
*prssdp
;
2725 struct dasd_rssd_perf_stats_t
*stats
;
2726 struct dasd_ccw_req
*cqr
;
2730 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1 /* PSF */ + 1 /* RSSD */,
2731 (sizeof(struct dasd_psf_prssd_data
) +
2732 sizeof(struct dasd_rssd_perf_stats_t
)),
2735 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
2736 "Could not allocate initialization request");
2737 return PTR_ERR(cqr
);
2739 cqr
->startdev
= device
;
2740 cqr
->memdev
= device
;
2742 clear_bit(DASD_CQR_FLAGS_USE_ERP
, &cqr
->flags
);
2743 cqr
->expires
= 10 * HZ
;
2745 /* Prepare for Read Subsystem Data */
2746 prssdp
= (struct dasd_psf_prssd_data
*) cqr
->data
;
2747 memset(prssdp
, 0, sizeof(struct dasd_psf_prssd_data
));
2748 prssdp
->order
= PSF_ORDER_PRSSD
;
2749 prssdp
->suborder
= 0x01; /* Performance Statistics */
2750 prssdp
->varies
[1] = 0x01; /* Perf Statistics for the Subsystem */
2753 ccw
->cmd_code
= DASD_ECKD_CCW_PSF
;
2754 ccw
->count
= sizeof(struct dasd_psf_prssd_data
);
2755 ccw
->flags
|= CCW_FLAG_CC
;
2756 ccw
->cda
= (__u32
)(addr_t
) prssdp
;
2758 /* Read Subsystem Data - Performance Statistics */
2759 stats
= (struct dasd_rssd_perf_stats_t
*) (prssdp
+ 1);
2760 memset(stats
, 0, sizeof(struct dasd_rssd_perf_stats_t
));
2763 ccw
->cmd_code
= DASD_ECKD_CCW_RSSD
;
2764 ccw
->count
= sizeof(struct dasd_rssd_perf_stats_t
);
2765 ccw
->cda
= (__u32
)(addr_t
) stats
;
2767 cqr
->buildclk
= get_clock();
2768 cqr
->status
= DASD_CQR_FILLED
;
2769 rc
= dasd_sleep_on(cqr
);
2771 prssdp
= (struct dasd_psf_prssd_data
*) cqr
->data
;
2772 stats
= (struct dasd_rssd_perf_stats_t
*) (prssdp
+ 1);
2773 if (copy_to_user(argp
, stats
,
2774 sizeof(struct dasd_rssd_perf_stats_t
)))
2777 dasd_sfree_request(cqr
, cqr
->memdev
);
2782 * Get attributes (cache operations)
2783 * Returnes the cache attributes used in Define Extend (DE).
2786 dasd_eckd_get_attrib(struct dasd_device
*device
, void __user
*argp
)
2788 struct dasd_eckd_private
*private =
2789 (struct dasd_eckd_private
*)device
->private;
2790 struct attrib_data_t attrib
= private->attrib
;
2793 if (!capable(CAP_SYS_ADMIN
))
2799 if (copy_to_user(argp
, (long *) &attrib
,
2800 sizeof(struct attrib_data_t
)))
2807 * Set attributes (cache operations)
2808 * Stores the attributes for cache operation to be used in Define Extend (DE).
2811 dasd_eckd_set_attrib(struct dasd_device
*device
, void __user
*argp
)
2813 struct dasd_eckd_private
*private =
2814 (struct dasd_eckd_private
*)device
->private;
2815 struct attrib_data_t attrib
;
2817 if (!capable(CAP_SYS_ADMIN
))
2822 if (copy_from_user(&attrib
, argp
, sizeof(struct attrib_data_t
)))
2824 private->attrib
= attrib
;
2826 dev_info(&device
->cdev
->dev
,
2827 "The DASD cache mode was set to %x (%i cylinder prestage)\n",
2828 private->attrib
.operation
, private->attrib
.nr_cyl
);
2833 * Issue syscall I/O to EMC Symmetrix array.
2834 * CCWs are PSF and RSSD
2836 static int dasd_symm_io(struct dasd_device
*device
, void __user
*argp
)
2838 struct dasd_symmio_parms usrparm
;
2839 char *psf_data
, *rssd_result
;
2840 struct dasd_ccw_req
*cqr
;
2844 /* Copy parms from caller */
2846 if (copy_from_user(&usrparm
, argp
, sizeof(usrparm
)))
2848 if (is_compat_task() || sizeof(long) == 4) {
2849 /* Make sure pointers are sane even on 31 bit. */
2851 if ((usrparm
.psf_data
>> 32) != 0)
2853 if ((usrparm
.rssd_result
>> 32) != 0)
2855 usrparm
.psf_data
&= 0x7fffffffULL
;
2856 usrparm
.rssd_result
&= 0x7fffffffULL
;
2858 /* alloc I/O data area */
2859 psf_data
= kzalloc(usrparm
.psf_data_len
, GFP_KERNEL
| GFP_DMA
);
2860 rssd_result
= kzalloc(usrparm
.rssd_result_len
, GFP_KERNEL
| GFP_DMA
);
2861 if (!psf_data
|| !rssd_result
) {
2866 /* get syscall header from user space */
2868 if (copy_from_user(psf_data
,
2869 (void __user
*)(unsigned long) usrparm
.psf_data
,
2870 usrparm
.psf_data_len
))
2873 /* sanity check on syscall header */
2874 if (psf_data
[0] != 0x17 && psf_data
[1] != 0xce) {
2879 /* setup CCWs for PSF + RSSD */
2880 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 2 , 0, device
);
2882 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
2883 "Could not allocate initialization request");
2888 cqr
->startdev
= device
;
2889 cqr
->memdev
= device
;
2891 cqr
->expires
= 10 * HZ
;
2892 cqr
->buildclk
= get_clock();
2893 cqr
->status
= DASD_CQR_FILLED
;
2895 /* Build the ccws */
2899 ccw
->cmd_code
= DASD_ECKD_CCW_PSF
;
2900 ccw
->count
= usrparm
.psf_data_len
;
2901 ccw
->flags
|= CCW_FLAG_CC
;
2902 ccw
->cda
= (__u32
)(addr_t
) psf_data
;
2907 ccw
->cmd_code
= DASD_ECKD_CCW_RSSD
;
2908 ccw
->count
= usrparm
.rssd_result_len
;
2909 ccw
->flags
= CCW_FLAG_SLI
;
2910 ccw
->cda
= (__u32
)(addr_t
) rssd_result
;
2912 rc
= dasd_sleep_on(cqr
);
2917 if (copy_to_user((void __user
*)(unsigned long) usrparm
.rssd_result
,
2918 rssd_result
, usrparm
.rssd_result_len
))
2923 dasd_sfree_request(cqr
, cqr
->memdev
);
2928 DBF_DEV_EVENT(DBF_WARNING
, device
, "Symmetrix ioctl: rc=%d", rc
);
2933 dasd_eckd_ioctl(struct dasd_block
*block
, unsigned int cmd
, void __user
*argp
)
2935 struct dasd_device
*device
= block
->base
;
2939 return dasd_eckd_get_attrib(device
, argp
);
2941 return dasd_eckd_set_attrib(device
, argp
);
2943 return dasd_eckd_performance(device
, argp
);
2945 return dasd_eckd_release(device
);
2947 return dasd_eckd_reserve(device
);
2949 return dasd_eckd_steal_lock(device
);
2951 return dasd_symm_io(device
, argp
);
2953 return -ENOIOCTLCMD
;
2958 * Dump the range of CCWs into 'page' buffer
2959 * and return number of printed chars.
2962 dasd_eckd_dump_ccw_range(struct ccw1
*from
, struct ccw1
*to
, char *page
)
2968 while (from
<= to
) {
2969 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
2970 " CCW %p: %08X %08X DAT:",
2971 from
, ((int *) from
)[0], ((int *) from
)[1]);
2973 /* get pointer to data (consider IDALs) */
2974 if (from
->flags
& CCW_FLAG_IDA
)
2975 datap
= (char *) *((addr_t
*) (addr_t
) from
->cda
);
2977 datap
= (char *) ((addr_t
) from
->cda
);
2979 /* dump data (max 32 bytes) */
2980 for (count
= 0; count
< from
->count
&& count
< 32; count
++) {
2981 if (count
% 8 == 0) len
+= sprintf(page
+ len
, " ");
2982 if (count
% 4 == 0) len
+= sprintf(page
+ len
, " ");
2983 len
+= sprintf(page
+ len
, "%02x", datap
[count
]);
2985 len
+= sprintf(page
+ len
, "\n");
2992 dasd_eckd_dump_sense_dbf(struct dasd_device
*device
, struct irb
*irb
,
2997 sense
= (u64
*) dasd_get_sense(irb
);
2999 DBF_DEV_EVENT(DBF_EMERG
, device
,
3000 "%s: %s %02x%02x%02x %016llx %016llx %016llx "
3002 scsw_is_tm(&irb
->scsw
) ? "t" : "c",
3003 scsw_cc(&irb
->scsw
), scsw_cstat(&irb
->scsw
),
3004 scsw_dstat(&irb
->scsw
), sense
[0], sense
[1],
3005 sense
[2], sense
[3]);
3007 DBF_DEV_EVENT(DBF_EMERG
, device
, "%s",
3008 "SORRY - NO VALID SENSE AVAILABLE\n");
3013 * Print sense data and related channel program.
3014 * Parts are printed because printk buffer is only 1024 bytes.
3016 static void dasd_eckd_dump_sense_ccw(struct dasd_device
*device
,
3017 struct dasd_ccw_req
*req
, struct irb
*irb
)
3020 struct ccw1
*first
, *last
, *fail
, *from
, *to
;
3023 page
= (char *) get_zeroed_page(GFP_ATOMIC
);
3025 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
3026 "No memory to dump sense data\n");
3029 /* dump the sense data */
3030 len
= sprintf(page
, KERN_ERR PRINTK_HEADER
3031 " I/O status report for device %s:\n",
3032 dev_name(&device
->cdev
->dev
));
3033 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3034 " in req: %p CS: 0x%02X DS: 0x%02X CC: 0x%02X RC: %d\n",
3035 req
, scsw_cstat(&irb
->scsw
), scsw_dstat(&irb
->scsw
),
3036 scsw_cc(&irb
->scsw
), req
->intrc
);
3037 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3038 " device %s: Failing CCW: %p\n",
3039 dev_name(&device
->cdev
->dev
),
3040 (void *) (addr_t
) irb
->scsw
.cmd
.cpa
);
3041 if (irb
->esw
.esw0
.erw
.cons
) {
3042 for (sl
= 0; sl
< 4; sl
++) {
3043 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3044 " Sense(hex) %2d-%2d:",
3045 (8 * sl
), ((8 * sl
) + 7));
3047 for (sct
= 0; sct
< 8; sct
++) {
3048 len
+= sprintf(page
+ len
, " %02x",
3049 irb
->ecw
[8 * sl
+ sct
]);
3051 len
+= sprintf(page
+ len
, "\n");
3054 if (irb
->ecw
[27] & DASD_SENSE_BIT_0
) {
3055 /* 24 Byte Sense Data */
3056 sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3057 " 24 Byte: %x MSG %x, "
3058 "%s MSGb to SYSOP\n",
3059 irb
->ecw
[7] >> 4, irb
->ecw
[7] & 0x0f,
3060 irb
->ecw
[1] & 0x10 ? "" : "no");
3062 /* 32 Byte Sense Data */
3063 sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3064 " 32 Byte: Format: %x "
3065 "Exception class %x\n",
3066 irb
->ecw
[6] & 0x0f, irb
->ecw
[22] >> 4);
3069 sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3070 " SORRY - NO VALID SENSE AVAILABLE\n");
3075 /* req == NULL for unsolicited interrupts */
3076 /* dump the Channel Program (max 140 Bytes per line) */
3077 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */
3078 first
= req
->cpaddr
;
3079 for (last
= first
; last
->flags
& (CCW_FLAG_CC
| CCW_FLAG_DC
); last
++);
3080 to
= min(first
+ 6, last
);
3081 len
= sprintf(page
, KERN_ERR PRINTK_HEADER
3082 " Related CP in req: %p\n", req
);
3083 dasd_eckd_dump_ccw_range(first
, to
, page
+ len
);
3086 /* print failing CCW area (maximum 4) */
3087 /* scsw->cda is either valid or zero */
3090 fail
= (struct ccw1
*)(addr_t
)
3091 irb
->scsw
.cmd
.cpa
; /* failing CCW */
3092 if (from
< fail
- 2) {
3093 from
= fail
- 2; /* there is a gap - print header */
3094 len
+= sprintf(page
, KERN_ERR PRINTK_HEADER
"......\n");
3096 to
= min(fail
+ 1, last
);
3097 len
+= dasd_eckd_dump_ccw_range(from
, to
, page
+ len
);
3099 /* print last CCWs (maximum 2) */
3100 from
= max(from
, ++to
);
3101 if (from
< last
- 1) {
3102 from
= last
- 1; /* there is a gap - print header */
3103 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
"......\n");
3105 len
+= dasd_eckd_dump_ccw_range(from
, last
, page
+ len
);
3109 free_page((unsigned long) page
);
3114 * Print sense data from a tcw.
3116 static void dasd_eckd_dump_sense_tcw(struct dasd_device
*device
,
3117 struct dasd_ccw_req
*req
, struct irb
*irb
)
3120 int len
, sl
, sct
, residual
;
3126 page
= (char *) get_zeroed_page(GFP_ATOMIC
);
3128 DBF_DEV_EVENT(DBF_WARNING
, device
, " %s",
3129 "No memory to dump sense data");
3132 /* dump the sense data */
3133 len
= sprintf(page
, KERN_ERR PRINTK_HEADER
3134 " I/O status report for device %s:\n",
3135 dev_name(&device
->cdev
->dev
));
3136 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3137 " in req: %p CS: 0x%02X DS: 0x%02X CC: 0x%02X RC: %d "
3138 "fcxs: 0x%02X schxs: 0x%02X\n", req
,
3139 scsw_cstat(&irb
->scsw
), scsw_dstat(&irb
->scsw
),
3140 scsw_cc(&irb
->scsw
), req
->intrc
,
3141 irb
->scsw
.tm
.fcxs
, irb
->scsw
.tm
.schxs
);
3142 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3143 " device %s: Failing TCW: %p\n",
3144 dev_name(&device
->cdev
->dev
),
3145 (void *) (addr_t
) irb
->scsw
.tm
.tcw
);
3149 if (irb
->scsw
.tm
.tcw
)
3151 (struct tcw
*)(unsigned long)irb
->scsw
.tm
.tcw
);
3153 if (tsb
&& (irb
->scsw
.tm
.fcxs
== 0x01)) {
3154 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3155 " tsb->length %d\n", tsb
->length
);
3156 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3157 " tsb->flags %x\n", tsb
->flags
);
3158 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3159 " tsb->dcw_offset %d\n", tsb
->dcw_offset
);
3160 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3161 " tsb->count %d\n", tsb
->count
);
3162 residual
= tsb
->count
- 28;
3163 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3164 " residual %d\n", residual
);
3166 switch (tsb
->flags
& 0x07) {
3167 case 1: /* tsa_iostat */
3168 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3169 " tsb->tsa.iostat.dev_time %d\n",
3170 tsb
->tsa
.iostat
.dev_time
);
3171 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3172 " tsb->tsa.iostat.def_time %d\n",
3173 tsb
->tsa
.iostat
.def_time
);
3174 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3175 " tsb->tsa.iostat.queue_time %d\n",
3176 tsb
->tsa
.iostat
.queue_time
);
3177 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3178 " tsb->tsa.iostat.dev_busy_time %d\n",
3179 tsb
->tsa
.iostat
.dev_busy_time
);
3180 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3181 " tsb->tsa.iostat.dev_act_time %d\n",
3182 tsb
->tsa
.iostat
.dev_act_time
);
3183 sense
= tsb
->tsa
.iostat
.sense
;
3185 case 2: /* ts_ddpc */
3186 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3187 " tsb->tsa.ddpc.rc %d\n", tsb
->tsa
.ddpc
.rc
);
3188 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3189 " tsb->tsa.ddpc.rcq: ");
3190 for (sl
= 0; sl
< 16; sl
++) {
3191 for (sct
= 0; sct
< 8; sct
++) {
3192 len
+= sprintf(page
+ len
, " %02x",
3193 tsb
->tsa
.ddpc
.rcq
[sl
]);
3195 len
+= sprintf(page
+ len
, "\n");
3197 sense
= tsb
->tsa
.ddpc
.sense
;
3199 case 3: /* tsa_intrg */
3200 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3201 " tsb->tsa.intrg.: not supportet yet \n");
3206 for (sl
= 0; sl
< 4; sl
++) {
3207 len
+= sprintf(page
+ len
,
3208 KERN_ERR PRINTK_HEADER
3209 " Sense(hex) %2d-%2d:",
3210 (8 * sl
), ((8 * sl
) + 7));
3211 for (sct
= 0; sct
< 8; sct
++) {
3212 len
+= sprintf(page
+ len
, " %02x",
3213 sense
[8 * sl
+ sct
]);
3215 len
+= sprintf(page
+ len
, "\n");
3218 if (sense
[27] & DASD_SENSE_BIT_0
) {
3219 /* 24 Byte Sense Data */
3220 sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3221 " 24 Byte: %x MSG %x, "
3222 "%s MSGb to SYSOP\n",
3223 sense
[7] >> 4, sense
[7] & 0x0f,
3224 sense
[1] & 0x10 ? "" : "no");
3226 /* 32 Byte Sense Data */
3227 sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3228 " 32 Byte: Format: %x "
3229 "Exception class %x\n",
3230 sense
[6] & 0x0f, sense
[22] >> 4);
3233 sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3234 " SORRY - NO VALID SENSE AVAILABLE\n");
3237 sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3238 " SORRY - NO TSB DATA AVAILABLE\n");
3241 free_page((unsigned long) page
);
3244 static void dasd_eckd_dump_sense(struct dasd_device
*device
,
3245 struct dasd_ccw_req
*req
, struct irb
*irb
)
3247 if (req
&& scsw_is_tm(&req
->irb
.scsw
))
3248 dasd_eckd_dump_sense_tcw(device
, req
, irb
);
3250 dasd_eckd_dump_sense_ccw(device
, req
, irb
);
3253 int dasd_eckd_pm_freeze(struct dasd_device
*device
)
3256 * the device should be disconnected from our LCU structure
3257 * on restore we will reconnect it and reread LCU specific
3258 * information like PAV support that might have changed
3260 dasd_alias_remove_device(device
);
3261 dasd_alias_disconnect_device_from_lcu(device
);
3266 int dasd_eckd_restore_device(struct dasd_device
*device
)
3268 struct dasd_eckd_private
*private;
3269 struct dasd_eckd_characteristics temp_rdc_data
;
3271 struct dasd_uid temp_uid
;
3272 unsigned long flags
;
3274 private = (struct dasd_eckd_private
*) device
->private;
3276 /* Read Configuration Data */
3277 rc
= dasd_eckd_read_conf(device
);
3281 /* Generate device unique id and register in devmap */
3282 rc
= dasd_eckd_generate_uid(device
, &private->uid
);
3283 dasd_get_uid(device
->cdev
, &temp_uid
);
3284 if (memcmp(&private->uid
, &temp_uid
, sizeof(struct dasd_uid
)) != 0)
3285 dev_err(&device
->cdev
->dev
, "The UID of the DASD has "
3289 dasd_set_uid(device
->cdev
, &private->uid
);
3291 /* register lcu with alias handling, enable PAV if this is a new lcu */
3292 is_known
= dasd_alias_make_device_known_to_lcu(device
);
3296 dasd_eckd_validate_server(device
);
3297 dasd_alias_lcu_setup_complete(device
);
3299 dasd_alias_wait_for_lcu_setup(device
);
3301 /* RE-Read Configuration Data */
3302 rc
= dasd_eckd_read_conf(device
);
3306 /* Read Feature Codes */
3307 dasd_eckd_read_features(device
);
3309 /* Read Device Characteristics */
3310 rc
= dasd_generic_read_dev_chars(device
, DASD_ECKD_MAGIC
,
3311 &temp_rdc_data
, 64);
3313 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
,
3314 "Read device characteristic failed, rc=%d", rc
);
3317 spin_lock_irqsave(get_ccwdev_lock(device
->cdev
), flags
);
3318 memcpy(&private->rdc_data
, &temp_rdc_data
, sizeof(temp_rdc_data
));
3319 spin_unlock_irqrestore(get_ccwdev_lock(device
->cdev
), flags
);
3321 /* add device to alias management */
3322 dasd_alias_add_device(device
);
3330 static struct ccw_driver dasd_eckd_driver
= {
3331 .name
= "dasd-eckd",
3332 .owner
= THIS_MODULE
,
3333 .ids
= dasd_eckd_ids
,
3334 .probe
= dasd_eckd_probe
,
3335 .remove
= dasd_generic_remove
,
3336 .set_offline
= dasd_generic_set_offline
,
3337 .set_online
= dasd_eckd_set_online
,
3338 .notify
= dasd_generic_notify
,
3339 .freeze
= dasd_generic_pm_freeze
,
3340 .thaw
= dasd_generic_restore_device
,
3341 .restore
= dasd_generic_restore_device
,
3345 * max_blocks is dependent on the amount of storage that is available
3346 * in the static io buffer for each device. Currently each device has
3347 * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has
3348 * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use
3349 * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In
3350 * addition we have one define extent ccw + 16 bytes of data and one
3351 * locate record ccw + 16 bytes of data. That makes:
3352 * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum.
3353 * We want to fit two into the available memory so that we can immediately
3354 * start the next request if one finishes off. That makes 249.5 blocks
3355 * for one request. Give a little safety and the result is 240.
3357 static struct dasd_discipline dasd_eckd_discipline
= {
3358 .owner
= THIS_MODULE
,
3362 .check_device
= dasd_eckd_check_characteristics
,
3363 .uncheck_device
= dasd_eckd_uncheck_device
,
3364 .do_analysis
= dasd_eckd_do_analysis
,
3365 .ready_to_online
= dasd_eckd_ready_to_online
,
3366 .online_to_ready
= dasd_eckd_online_to_ready
,
3367 .fill_geometry
= dasd_eckd_fill_geometry
,
3368 .start_IO
= dasd_start_IO
,
3369 .term_IO
= dasd_term_IO
,
3370 .handle_terminated_request
= dasd_eckd_handle_terminated_request
,
3371 .format_device
= dasd_eckd_format_device
,
3372 .erp_action
= dasd_eckd_erp_action
,
3373 .erp_postaction
= dasd_eckd_erp_postaction
,
3374 .handle_unsolicited_interrupt
= dasd_eckd_handle_unsolicited_interrupt
,
3375 .build_cp
= dasd_eckd_build_alias_cp
,
3376 .free_cp
= dasd_eckd_free_alias_cp
,
3377 .dump_sense
= dasd_eckd_dump_sense
,
3378 .dump_sense_dbf
= dasd_eckd_dump_sense_dbf
,
3379 .fill_info
= dasd_eckd_fill_info
,
3380 .ioctl
= dasd_eckd_ioctl
,
3381 .freeze
= dasd_eckd_pm_freeze
,
3382 .restore
= dasd_eckd_restore_device
,
3386 dasd_eckd_init(void)
3390 ASCEBC(dasd_eckd_discipline
.ebcname
, 4);
3391 ret
= ccw_driver_register(&dasd_eckd_driver
);
3393 wait_for_device_probe();
3399 dasd_eckd_cleanup(void)
3401 ccw_driver_unregister(&dasd_eckd_driver
);
3404 module_init(dasd_eckd_init
);
3405 module_exit(dasd_eckd_cleanup
);