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>
27 #include <asm/uaccess.h>
29 #include <asm/ccwdev.h>
33 #include "dasd_eckd.h"
34 #include "../cio/chsc.h"
39 #endif /* PRINTK_HEADER */
40 #define PRINTK_HEADER "dasd(eckd):"
42 #define ECKD_C0(i) (i->home_bytes)
43 #define ECKD_F(i) (i->formula)
44 #define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\
45 (i->factors.f_0x02.f1))
46 #define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\
47 (i->factors.f_0x02.f2))
48 #define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\
49 (i->factors.f_0x02.f3))
50 #define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0)
51 #define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0)
52 #define ECKD_F6(i) (i->factor6)
53 #define ECKD_F7(i) (i->factor7)
54 #define ECKD_F8(i) (i->factor8)
56 MODULE_LICENSE("GPL");
58 static struct dasd_discipline dasd_eckd_discipline
;
60 /* The ccw bus type uses this table to find devices that it sends to
62 static struct ccw_device_id dasd_eckd_ids
[] = {
63 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info
= 0x1},
64 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info
= 0x2},
65 { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3390, 0), .driver_info
= 0x3},
66 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info
= 0x4},
67 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info
= 0x5},
68 { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info
= 0x6},
69 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info
= 0x7},
70 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info
= 0x8},
71 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info
= 0x9},
72 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info
= 0xa},
73 { /* end of list */ },
76 MODULE_DEVICE_TABLE(ccw
, dasd_eckd_ids
);
78 static struct ccw_driver dasd_eckd_driver
; /* see below */
81 #define INIT_CQR_UNFORMATTED 1
82 #define INIT_CQR_ERROR 2
85 /* initial attempt at a probe function. this can be simplified once
86 * the other detection code is gone */
88 dasd_eckd_probe (struct ccw_device
*cdev
)
92 /* set ECKD specific ccw-device options */
93 ret
= ccw_device_set_options(cdev
, CCWDEV_ALLOW_FORCE
|
94 CCWDEV_DO_PATHGROUP
| CCWDEV_DO_MULTIPATH
);
96 DBF_EVENT_DEVID(DBF_WARNING
, cdev
, "%s",
97 "dasd_eckd_probe: could not set "
98 "ccw-device options");
101 ret
= dasd_generic_probe(cdev
, &dasd_eckd_discipline
);
106 dasd_eckd_set_online(struct ccw_device
*cdev
)
108 return dasd_generic_set_online(cdev
, &dasd_eckd_discipline
);
111 static const int sizes_trk0
[] = { 28, 148, 84 };
112 #define LABEL_SIZE 140
114 static inline unsigned int
115 round_up_multiple(unsigned int no
, unsigned int mult
)
118 return (rem
? no
- rem
+ mult
: no
);
121 static inline unsigned int
122 ceil_quot(unsigned int d1
, unsigned int d2
)
124 return (d1
+ (d2
- 1)) / d2
;
128 recs_per_track(struct dasd_eckd_characteristics
* rdc
,
129 unsigned int kl
, unsigned int dl
)
133 switch (rdc
->dev_type
) {
136 return 1499 / (15 + 7 + ceil_quot(kl
+ 12, 32) +
137 ceil_quot(dl
+ 12, 32));
139 return 1499 / (15 + ceil_quot(dl
+ 12, 32));
141 dn
= ceil_quot(dl
+ 6, 232) + 1;
143 kn
= ceil_quot(kl
+ 6, 232) + 1;
144 return 1729 / (10 + 9 + ceil_quot(kl
+ 6 * kn
, 34) +
145 9 + ceil_quot(dl
+ 6 * dn
, 34));
147 return 1729 / (10 + 9 + ceil_quot(dl
+ 6 * dn
, 34));
149 dn
= ceil_quot(dl
+ 6, 232) + 1;
151 kn
= ceil_quot(kl
+ 6, 232) + 1;
152 return 1420 / (18 + 7 + ceil_quot(kl
+ 6 * kn
, 34) +
153 ceil_quot(dl
+ 6 * dn
, 34));
155 return 1420 / (18 + 7 + ceil_quot(dl
+ 6 * dn
, 34));
160 static void set_ch_t(struct ch_t
*geo
, __u32 cyl
, __u8 head
)
162 geo
->cyl
= (__u16
) cyl
;
163 geo
->head
= cyl
>> 16;
169 check_XRC (struct ccw1
*de_ccw
,
170 struct DE_eckd_data
*data
,
171 struct dasd_device
*device
)
173 struct dasd_eckd_private
*private;
176 private = (struct dasd_eckd_private
*) device
->private;
177 if (!private->rdc_data
.facilities
.XRC_supported
)
180 /* switch on System Time Stamp - needed for XRC Support */
181 data
->ga_extended
|= 0x08; /* switch on 'Time Stamp Valid' */
182 data
->ga_extended
|= 0x02; /* switch on 'Extended Parameter' */
184 rc
= get_sync_clock(&data
->ep_sys_time
);
185 /* Ignore return code if sync clock is switched off. */
186 if (rc
== -ENOSYS
|| rc
== -EACCES
)
189 de_ccw
->count
= sizeof(struct DE_eckd_data
);
190 de_ccw
->flags
|= CCW_FLAG_SLI
;
195 define_extent(struct ccw1
*ccw
, struct DE_eckd_data
*data
, unsigned int trk
,
196 unsigned int totrk
, int cmd
, struct dasd_device
*device
)
198 struct dasd_eckd_private
*private;
200 u16 heads
, beghead
, endhead
;
203 private = (struct dasd_eckd_private
*) device
->private;
205 ccw
->cmd_code
= DASD_ECKD_CCW_DEFINE_EXTENT
;
208 ccw
->cda
= (__u32
) __pa(data
);
210 memset(data
, 0, sizeof(struct DE_eckd_data
));
212 case DASD_ECKD_CCW_READ_HOME_ADDRESS
:
213 case DASD_ECKD_CCW_READ_RECORD_ZERO
:
214 case DASD_ECKD_CCW_READ
:
215 case DASD_ECKD_CCW_READ_MT
:
216 case DASD_ECKD_CCW_READ_CKD
:
217 case DASD_ECKD_CCW_READ_CKD_MT
:
218 case DASD_ECKD_CCW_READ_KD
:
219 case DASD_ECKD_CCW_READ_KD_MT
:
220 case DASD_ECKD_CCW_READ_COUNT
:
221 data
->mask
.perm
= 0x1;
222 data
->attributes
.operation
= private->attrib
.operation
;
224 case DASD_ECKD_CCW_WRITE
:
225 case DASD_ECKD_CCW_WRITE_MT
:
226 case DASD_ECKD_CCW_WRITE_KD
:
227 case DASD_ECKD_CCW_WRITE_KD_MT
:
228 data
->mask
.perm
= 0x02;
229 data
->attributes
.operation
= private->attrib
.operation
;
230 rc
= check_XRC (ccw
, data
, device
);
232 case DASD_ECKD_CCW_WRITE_CKD
:
233 case DASD_ECKD_CCW_WRITE_CKD_MT
:
234 data
->attributes
.operation
= DASD_BYPASS_CACHE
;
235 rc
= check_XRC (ccw
, data
, device
);
237 case DASD_ECKD_CCW_ERASE
:
238 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS
:
239 case DASD_ECKD_CCW_WRITE_RECORD_ZERO
:
240 data
->mask
.perm
= 0x3;
241 data
->mask
.auth
= 0x1;
242 data
->attributes
.operation
= DASD_BYPASS_CACHE
;
243 rc
= check_XRC (ccw
, data
, device
);
246 dev_err(&device
->cdev
->dev
,
247 "0x%x is not a known command\n", cmd
);
251 data
->attributes
.mode
= 0x3; /* ECKD */
253 if ((private->rdc_data
.cu_type
== 0x2105 ||
254 private->rdc_data
.cu_type
== 0x2107 ||
255 private->rdc_data
.cu_type
== 0x1750)
256 && !(private->uses_cdl
&& trk
< 2))
257 data
->ga_extended
|= 0x40; /* Regular Data Format Mode */
259 heads
= private->rdc_data
.trk_per_cyl
;
260 begcyl
= trk
/ heads
;
261 beghead
= trk
% heads
;
262 endcyl
= totrk
/ heads
;
263 endhead
= totrk
% heads
;
265 /* check for sequential prestage - enhance cylinder range */
266 if (data
->attributes
.operation
== DASD_SEQ_PRESTAGE
||
267 data
->attributes
.operation
== DASD_SEQ_ACCESS
) {
269 if (endcyl
+ private->attrib
.nr_cyl
< private->real_cyl
)
270 endcyl
+= private->attrib
.nr_cyl
;
272 endcyl
= (private->real_cyl
- 1);
275 set_ch_t(&data
->beg_ext
, begcyl
, beghead
);
276 set_ch_t(&data
->end_ext
, endcyl
, endhead
);
280 static int check_XRC_on_prefix(struct PFX_eckd_data
*pfxdata
,
281 struct dasd_device
*device
)
283 struct dasd_eckd_private
*private;
286 private = (struct dasd_eckd_private
*) device
->private;
287 if (!private->rdc_data
.facilities
.XRC_supported
)
290 /* switch on System Time Stamp - needed for XRC Support */
291 pfxdata
->define_extent
.ga_extended
|= 0x08; /* 'Time Stamp Valid' */
292 pfxdata
->define_extent
.ga_extended
|= 0x02; /* 'Extended Parameter' */
293 pfxdata
->validity
.time_stamp
= 1; /* 'Time Stamp Valid' */
295 rc
= get_sync_clock(&pfxdata
->define_extent
.ep_sys_time
);
296 /* Ignore return code if sync clock is switched off. */
297 if (rc
== -ENOSYS
|| rc
== -EACCES
)
302 static void fill_LRE_data(struct LRE_eckd_data
*data
, unsigned int trk
,
303 unsigned int rec_on_trk
, int count
, int cmd
,
304 struct dasd_device
*device
, unsigned int reclen
,
307 struct dasd_eckd_private
*private;
311 private = (struct dasd_eckd_private
*) device
->private;
313 memset(data
, 0, sizeof(*data
));
316 switch (private->rdc_data
.dev_type
) {
318 dn
= ceil_quot(reclen
+ 6, 232);
319 d
= 9 + ceil_quot(reclen
+ 6 * (dn
+ 1), 34);
320 sector
= (49 + (rec_on_trk
- 1) * (10 + d
)) / 8;
323 d
= 7 + ceil_quot(reclen
+ 12, 32);
324 sector
= (39 + (rec_on_trk
- 1) * (8 + d
)) / 7;
328 data
->sector
= sector
;
329 /* note: meaning of count depends on the operation
330 * for record based I/O it's the number of records, but for
331 * track based I/O it's the number of tracks
335 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS
:
336 data
->operation
.orientation
= 0x3;
337 data
->operation
.operation
= 0x03;
339 case DASD_ECKD_CCW_READ_HOME_ADDRESS
:
340 data
->operation
.orientation
= 0x3;
341 data
->operation
.operation
= 0x16;
343 case DASD_ECKD_CCW_WRITE_RECORD_ZERO
:
344 data
->operation
.orientation
= 0x1;
345 data
->operation
.operation
= 0x03;
348 case DASD_ECKD_CCW_READ_RECORD_ZERO
:
349 data
->operation
.orientation
= 0x3;
350 data
->operation
.operation
= 0x16;
353 case DASD_ECKD_CCW_WRITE
:
354 case DASD_ECKD_CCW_WRITE_MT
:
355 case DASD_ECKD_CCW_WRITE_KD
:
356 case DASD_ECKD_CCW_WRITE_KD_MT
:
357 data
->auxiliary
.length_valid
= 0x1;
358 data
->length
= reclen
;
359 data
->operation
.operation
= 0x01;
361 case DASD_ECKD_CCW_WRITE_CKD
:
362 case DASD_ECKD_CCW_WRITE_CKD_MT
:
363 data
->auxiliary
.length_valid
= 0x1;
364 data
->length
= reclen
;
365 data
->operation
.operation
= 0x03;
367 case DASD_ECKD_CCW_WRITE_TRACK_DATA
:
368 data
->auxiliary
.length_valid
= 0x1;
369 data
->length
= reclen
; /* not tlf, as one might think */
370 data
->operation
.operation
= 0x3F;
371 data
->extended_operation
= 0x23;
373 case DASD_ECKD_CCW_READ
:
374 case DASD_ECKD_CCW_READ_MT
:
375 case DASD_ECKD_CCW_READ_KD
:
376 case DASD_ECKD_CCW_READ_KD_MT
:
377 data
->auxiliary
.length_valid
= 0x1;
378 data
->length
= reclen
;
379 data
->operation
.operation
= 0x06;
381 case DASD_ECKD_CCW_READ_CKD
:
382 case DASD_ECKD_CCW_READ_CKD_MT
:
383 data
->auxiliary
.length_valid
= 0x1;
384 data
->length
= reclen
;
385 data
->operation
.operation
= 0x16;
387 case DASD_ECKD_CCW_READ_COUNT
:
388 data
->operation
.operation
= 0x06;
390 case DASD_ECKD_CCW_READ_TRACK_DATA
:
391 data
->auxiliary
.length_valid
= 0x1;
393 data
->operation
.operation
= 0x0C;
395 case DASD_ECKD_CCW_ERASE
:
396 data
->length
= reclen
;
397 data
->auxiliary
.length_valid
= 0x1;
398 data
->operation
.operation
= 0x0b;
401 DBF_DEV_EVENT(DBF_ERR
, device
,
402 "fill LRE unknown opcode 0x%x", cmd
);
405 set_ch_t(&data
->seek_addr
,
406 trk
/ private->rdc_data
.trk_per_cyl
,
407 trk
% private->rdc_data
.trk_per_cyl
);
408 data
->search_arg
.cyl
= data
->seek_addr
.cyl
;
409 data
->search_arg
.head
= data
->seek_addr
.head
;
410 data
->search_arg
.record
= rec_on_trk
;
413 static int prefix_LRE(struct ccw1
*ccw
, struct PFX_eckd_data
*pfxdata
,
414 unsigned int trk
, unsigned int totrk
, int cmd
,
415 struct dasd_device
*basedev
, struct dasd_device
*startdev
,
416 unsigned char format
, unsigned int rec_on_trk
, int count
,
417 unsigned int blksize
, unsigned int tlf
)
419 struct dasd_eckd_private
*basepriv
, *startpriv
;
420 struct DE_eckd_data
*dedata
;
421 struct LRE_eckd_data
*lredata
;
423 u16 heads
, beghead
, endhead
;
426 basepriv
= (struct dasd_eckd_private
*) basedev
->private;
427 startpriv
= (struct dasd_eckd_private
*) startdev
->private;
428 dedata
= &pfxdata
->define_extent
;
429 lredata
= &pfxdata
->locate_record
;
431 ccw
->cmd_code
= DASD_ECKD_CCW_PFX
;
433 ccw
->count
= sizeof(*pfxdata
);
434 ccw
->cda
= (__u32
) __pa(pfxdata
);
436 memset(pfxdata
, 0, sizeof(*pfxdata
));
439 DBF_DEV_EVENT(DBF_ERR
, basedev
,
440 "PFX LRE unknown format 0x%x", format
);
444 pfxdata
->format
= format
;
445 pfxdata
->base_address
= basepriv
->ned
->unit_addr
;
446 pfxdata
->base_lss
= basepriv
->ned
->ID
;
447 pfxdata
->validity
.define_extent
= 1;
449 /* private uid is kept up to date, conf_data may be outdated */
450 if (startpriv
->uid
.type
!= UA_BASE_DEVICE
) {
451 pfxdata
->validity
.verify_base
= 1;
452 if (startpriv
->uid
.type
== UA_HYPER_PAV_ALIAS
)
453 pfxdata
->validity
.hyper_pav
= 1;
456 /* define extend data (mostly)*/
458 case DASD_ECKD_CCW_READ_HOME_ADDRESS
:
459 case DASD_ECKD_CCW_READ_RECORD_ZERO
:
460 case DASD_ECKD_CCW_READ
:
461 case DASD_ECKD_CCW_READ_MT
:
462 case DASD_ECKD_CCW_READ_CKD
:
463 case DASD_ECKD_CCW_READ_CKD_MT
:
464 case DASD_ECKD_CCW_READ_KD
:
465 case DASD_ECKD_CCW_READ_KD_MT
:
466 case DASD_ECKD_CCW_READ_COUNT
:
467 dedata
->mask
.perm
= 0x1;
468 dedata
->attributes
.operation
= basepriv
->attrib
.operation
;
470 case DASD_ECKD_CCW_READ_TRACK_DATA
:
471 dedata
->mask
.perm
= 0x1;
472 dedata
->attributes
.operation
= basepriv
->attrib
.operation
;
473 dedata
->blk_size
= 0;
475 case DASD_ECKD_CCW_WRITE
:
476 case DASD_ECKD_CCW_WRITE_MT
:
477 case DASD_ECKD_CCW_WRITE_KD
:
478 case DASD_ECKD_CCW_WRITE_KD_MT
:
479 dedata
->mask
.perm
= 0x02;
480 dedata
->attributes
.operation
= basepriv
->attrib
.operation
;
481 rc
= check_XRC_on_prefix(pfxdata
, basedev
);
483 case DASD_ECKD_CCW_WRITE_CKD
:
484 case DASD_ECKD_CCW_WRITE_CKD_MT
:
485 dedata
->attributes
.operation
= DASD_BYPASS_CACHE
;
486 rc
= check_XRC_on_prefix(pfxdata
, basedev
);
488 case DASD_ECKD_CCW_ERASE
:
489 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS
:
490 case DASD_ECKD_CCW_WRITE_RECORD_ZERO
:
491 dedata
->mask
.perm
= 0x3;
492 dedata
->mask
.auth
= 0x1;
493 dedata
->attributes
.operation
= DASD_BYPASS_CACHE
;
494 rc
= check_XRC_on_prefix(pfxdata
, basedev
);
496 case DASD_ECKD_CCW_WRITE_TRACK_DATA
:
497 dedata
->mask
.perm
= 0x02;
498 dedata
->attributes
.operation
= basepriv
->attrib
.operation
;
499 dedata
->blk_size
= blksize
;
500 rc
= check_XRC_on_prefix(pfxdata
, basedev
);
503 DBF_DEV_EVENT(DBF_ERR
, basedev
,
504 "PFX LRE unknown opcode 0x%x", cmd
);
509 dedata
->attributes
.mode
= 0x3; /* ECKD */
511 if ((basepriv
->rdc_data
.cu_type
== 0x2105 ||
512 basepriv
->rdc_data
.cu_type
== 0x2107 ||
513 basepriv
->rdc_data
.cu_type
== 0x1750)
514 && !(basepriv
->uses_cdl
&& trk
< 2))
515 dedata
->ga_extended
|= 0x40; /* Regular Data Format Mode */
517 heads
= basepriv
->rdc_data
.trk_per_cyl
;
518 begcyl
= trk
/ heads
;
519 beghead
= trk
% heads
;
520 endcyl
= totrk
/ heads
;
521 endhead
= totrk
% heads
;
523 /* check for sequential prestage - enhance cylinder range */
524 if (dedata
->attributes
.operation
== DASD_SEQ_PRESTAGE
||
525 dedata
->attributes
.operation
== DASD_SEQ_ACCESS
) {
527 if (endcyl
+ basepriv
->attrib
.nr_cyl
< basepriv
->real_cyl
)
528 endcyl
+= basepriv
->attrib
.nr_cyl
;
530 endcyl
= (basepriv
->real_cyl
- 1);
533 set_ch_t(&dedata
->beg_ext
, begcyl
, beghead
);
534 set_ch_t(&dedata
->end_ext
, endcyl
, endhead
);
537 fill_LRE_data(lredata
, trk
, rec_on_trk
, count
, cmd
,
538 basedev
, blksize
, tlf
);
544 static int prefix(struct ccw1
*ccw
, struct PFX_eckd_data
*pfxdata
,
545 unsigned int trk
, unsigned int totrk
, int cmd
,
546 struct dasd_device
*basedev
, struct dasd_device
*startdev
)
548 return prefix_LRE(ccw
, pfxdata
, trk
, totrk
, cmd
, basedev
, startdev
,
553 locate_record(struct ccw1
*ccw
, struct LO_eckd_data
*data
, unsigned int trk
,
554 unsigned int rec_on_trk
, int no_rec
, int cmd
,
555 struct dasd_device
* device
, int reclen
)
557 struct dasd_eckd_private
*private;
561 private = (struct dasd_eckd_private
*) device
->private;
563 DBF_DEV_EVENT(DBF_INFO
, device
,
564 "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d",
565 trk
, rec_on_trk
, no_rec
, cmd
, reclen
);
567 ccw
->cmd_code
= DASD_ECKD_CCW_LOCATE_RECORD
;
570 ccw
->cda
= (__u32
) __pa(data
);
572 memset(data
, 0, sizeof(struct LO_eckd_data
));
575 switch (private->rdc_data
.dev_type
) {
577 dn
= ceil_quot(reclen
+ 6, 232);
578 d
= 9 + ceil_quot(reclen
+ 6 * (dn
+ 1), 34);
579 sector
= (49 + (rec_on_trk
- 1) * (10 + d
)) / 8;
582 d
= 7 + ceil_quot(reclen
+ 12, 32);
583 sector
= (39 + (rec_on_trk
- 1) * (8 + d
)) / 7;
587 data
->sector
= sector
;
588 data
->count
= no_rec
;
590 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS
:
591 data
->operation
.orientation
= 0x3;
592 data
->operation
.operation
= 0x03;
594 case DASD_ECKD_CCW_READ_HOME_ADDRESS
:
595 data
->operation
.orientation
= 0x3;
596 data
->operation
.operation
= 0x16;
598 case DASD_ECKD_CCW_WRITE_RECORD_ZERO
:
599 data
->operation
.orientation
= 0x1;
600 data
->operation
.operation
= 0x03;
603 case DASD_ECKD_CCW_READ_RECORD_ZERO
:
604 data
->operation
.orientation
= 0x3;
605 data
->operation
.operation
= 0x16;
608 case DASD_ECKD_CCW_WRITE
:
609 case DASD_ECKD_CCW_WRITE_MT
:
610 case DASD_ECKD_CCW_WRITE_KD
:
611 case DASD_ECKD_CCW_WRITE_KD_MT
:
612 data
->auxiliary
.last_bytes_used
= 0x1;
613 data
->length
= reclen
;
614 data
->operation
.operation
= 0x01;
616 case DASD_ECKD_CCW_WRITE_CKD
:
617 case DASD_ECKD_CCW_WRITE_CKD_MT
:
618 data
->auxiliary
.last_bytes_used
= 0x1;
619 data
->length
= reclen
;
620 data
->operation
.operation
= 0x03;
622 case DASD_ECKD_CCW_READ
:
623 case DASD_ECKD_CCW_READ_MT
:
624 case DASD_ECKD_CCW_READ_KD
:
625 case DASD_ECKD_CCW_READ_KD_MT
:
626 data
->auxiliary
.last_bytes_used
= 0x1;
627 data
->length
= reclen
;
628 data
->operation
.operation
= 0x06;
630 case DASD_ECKD_CCW_READ_CKD
:
631 case DASD_ECKD_CCW_READ_CKD_MT
:
632 data
->auxiliary
.last_bytes_used
= 0x1;
633 data
->length
= reclen
;
634 data
->operation
.operation
= 0x16;
636 case DASD_ECKD_CCW_READ_COUNT
:
637 data
->operation
.operation
= 0x06;
639 case DASD_ECKD_CCW_ERASE
:
640 data
->length
= reclen
;
641 data
->auxiliary
.last_bytes_used
= 0x1;
642 data
->operation
.operation
= 0x0b;
645 DBF_DEV_EVENT(DBF_ERR
, device
, "unknown locate record "
648 set_ch_t(&data
->seek_addr
,
649 trk
/ private->rdc_data
.trk_per_cyl
,
650 trk
% private->rdc_data
.trk_per_cyl
);
651 data
->search_arg
.cyl
= data
->seek_addr
.cyl
;
652 data
->search_arg
.head
= data
->seek_addr
.head
;
653 data
->search_arg
.record
= rec_on_trk
;
657 * Returns 1 if the block is one of the special blocks that needs
658 * to get read/written with the KD variant of the command.
659 * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and
660 * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT.
661 * Luckily the KD variants differ only by one bit (0x08) from the
662 * normal variant. So don't wonder about code like:
663 * if (dasd_eckd_cdl_special(blk_per_trk, recid))
664 * ccw->cmd_code |= 0x8;
667 dasd_eckd_cdl_special(int blk_per_trk
, int recid
)
671 if (recid
< blk_per_trk
)
673 if (recid
< 2 * blk_per_trk
)
679 * Returns the record size for the special blocks of the cdl format.
680 * Only returns something useful if dasd_eckd_cdl_special is true
684 dasd_eckd_cdl_reclen(int recid
)
687 return sizes_trk0
[recid
];
692 * Generate device unique id that specifies the physical device.
694 static int dasd_eckd_generate_uid(struct dasd_device
*device
,
695 struct dasd_uid
*uid
)
697 struct dasd_eckd_private
*private;
700 private = (struct dasd_eckd_private
*) device
->private;
703 if (!private->ned
|| !private->gneq
)
706 memset(uid
, 0, sizeof(struct dasd_uid
));
707 memcpy(uid
->vendor
, private->ned
->HDA_manufacturer
,
708 sizeof(uid
->vendor
) - 1);
709 EBCASC(uid
->vendor
, sizeof(uid
->vendor
) - 1);
710 memcpy(uid
->serial
, private->ned
->HDA_location
,
711 sizeof(uid
->serial
) - 1);
712 EBCASC(uid
->serial
, sizeof(uid
->serial
) - 1);
713 uid
->ssid
= private->gneq
->subsystemID
;
714 uid
->real_unit_addr
= private->ned
->unit_addr
;
716 uid
->type
= private->sneq
->sua_flags
;
717 if (uid
->type
== UA_BASE_PAV_ALIAS
)
718 uid
->base_unit_addr
= private->sneq
->base_unit_addr
;
720 uid
->type
= UA_BASE_DEVICE
;
722 if (private->vdsneq
) {
723 for (count
= 0; count
< 16; count
++) {
724 sprintf(uid
->vduit
+2*count
, "%02x",
725 private->vdsneq
->uit
[count
]);
731 static struct dasd_ccw_req
*dasd_eckd_build_rcd_lpm(struct dasd_device
*device
,
733 struct ciw
*ciw
, __u8 lpm
)
735 struct dasd_ccw_req
*cqr
;
738 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1 /* RCD */, ciw
->count
,
742 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
743 "Could not allocate RCD request");
748 ccw
->cmd_code
= ciw
->cmd
;
749 ccw
->cda
= (__u32
)(addr_t
)rcd_buffer
;
750 ccw
->count
= ciw
->count
;
752 cqr
->startdev
= device
;
753 cqr
->memdev
= device
;
755 cqr
->expires
= 10*HZ
;
758 cqr
->buildclk
= get_clock();
759 cqr
->status
= DASD_CQR_FILLED
;
763 static int dasd_eckd_read_conf_lpm(struct dasd_device
*device
,
765 int *rcd_buffer_size
, __u8 lpm
)
768 char *rcd_buf
= NULL
;
770 struct dasd_ccw_req
*cqr
;
773 * scan for RCD command in extended SenseID data
775 ciw
= ccw_device_get_ciw(device
->cdev
, CIW_TYPE_RCD
);
776 if (!ciw
|| ciw
->cmd
== 0) {
780 rcd_buf
= kzalloc(ciw
->count
, GFP_KERNEL
| GFP_DMA
);
787 * buffer has to start with EBCDIC "V1.0" to show
788 * support for virtual device SNEQ
794 cqr
= dasd_eckd_build_rcd_lpm(device
, rcd_buf
, ciw
, lpm
);
799 ret
= dasd_sleep_on(cqr
);
801 * on success we update the user input parms
803 dasd_sfree_request(cqr
, cqr
->memdev
);
807 *rcd_buffer_size
= ciw
->count
;
808 *rcd_buffer
= rcd_buf
;
813 *rcd_buffer_size
= 0;
817 static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private
*private)
820 struct dasd_sneq
*sneq
;
824 private->sneq
= NULL
;
825 private->vdsneq
= NULL
;
826 private->gneq
= NULL
;
827 count
= private->conf_len
/ sizeof(struct dasd_sneq
);
828 sneq
= (struct dasd_sneq
*)private->conf_data
;
829 for (i
= 0; i
< count
; ++i
) {
830 if (sneq
->flags
.identifier
== 1 && sneq
->format
== 1)
831 private->sneq
= sneq
;
832 else if (sneq
->flags
.identifier
== 1 && sneq
->format
== 4)
833 private->vdsneq
= (struct vd_sneq
*)sneq
;
834 else if (sneq
->flags
.identifier
== 2)
835 private->gneq
= (struct dasd_gneq
*)sneq
;
836 else if (sneq
->flags
.identifier
== 3 && sneq
->res1
== 1)
837 private->ned
= (struct dasd_ned
*)sneq
;
840 if (!private->ned
|| !private->gneq
) {
842 private->sneq
= NULL
;
843 private->vdsneq
= NULL
;
844 private->gneq
= NULL
;
851 static unsigned char dasd_eckd_path_access(void *conf_data
, int conf_len
)
853 struct dasd_gneq
*gneq
;
856 count
= conf_len
/ sizeof(*gneq
);
857 gneq
= (struct dasd_gneq
*)conf_data
;
859 for (i
= 0; i
< count
; ++i
) {
860 if (gneq
->flags
.identifier
== 2) {
867 return ((char *)gneq
)[18] & 0x07;
872 static int dasd_eckd_read_conf(struct dasd_device
*device
)
875 int conf_len
, conf_data_saved
;
878 struct dasd_eckd_private
*private;
879 struct dasd_eckd_path
*path_data
;
881 private = (struct dasd_eckd_private
*) device
->private;
882 path_data
= (struct dasd_eckd_path
*) &private->path_data
;
883 path_data
->opm
= ccw_device_get_path_mask(device
->cdev
);
886 /* get configuration data per operational path */
887 for (lpm
= 0x80; lpm
; lpm
>>= 1) {
888 if (lpm
& path_data
->opm
){
889 rc
= dasd_eckd_read_conf_lpm(device
, &conf_data
,
891 if (rc
&& rc
!= -EOPNOTSUPP
) { /* -EOPNOTSUPP is ok */
892 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
,
893 "Read configuration data returned "
897 if (conf_data
== NULL
) {
898 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
, "%s",
899 "No configuration data "
901 continue; /* no error */
903 /* save first valid configuration data */
904 if (!conf_data_saved
) {
905 kfree(private->conf_data
);
906 private->conf_data
= conf_data
;
907 private->conf_len
= conf_len
;
908 if (dasd_eckd_identify_conf_parts(private)) {
909 private->conf_data
= NULL
;
910 private->conf_len
= 0;
916 switch (dasd_eckd_path_access(conf_data
, conf_len
)) {
918 path_data
->npm
|= lpm
;
921 path_data
->ppm
|= lpm
;
924 if (conf_data
!= private->conf_data
)
931 static int dasd_eckd_read_features(struct dasd_device
*device
)
933 struct dasd_psf_prssd_data
*prssdp
;
934 struct dasd_rssd_features
*features
;
935 struct dasd_ccw_req
*cqr
;
938 struct dasd_eckd_private
*private;
940 private = (struct dasd_eckd_private
*) device
->private;
941 memset(&private->features
, 0, sizeof(struct dasd_rssd_features
));
942 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1 /* PSF */ + 1 /* RSSD */,
943 (sizeof(struct dasd_psf_prssd_data
) +
944 sizeof(struct dasd_rssd_features
)),
947 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
, "%s", "Could not "
948 "allocate initialization request");
951 cqr
->startdev
= device
;
952 cqr
->memdev
= device
;
955 cqr
->expires
= 10 * HZ
;
957 /* Prepare for Read Subsystem Data */
958 prssdp
= (struct dasd_psf_prssd_data
*) cqr
->data
;
959 memset(prssdp
, 0, sizeof(struct dasd_psf_prssd_data
));
960 prssdp
->order
= PSF_ORDER_PRSSD
;
961 prssdp
->suborder
= 0x41; /* Read Feature Codes */
962 /* all other bytes of prssdp must be zero */
965 ccw
->cmd_code
= DASD_ECKD_CCW_PSF
;
966 ccw
->count
= sizeof(struct dasd_psf_prssd_data
);
967 ccw
->flags
|= CCW_FLAG_CC
;
968 ccw
->cda
= (__u32
)(addr_t
) prssdp
;
970 /* Read Subsystem Data - feature codes */
971 features
= (struct dasd_rssd_features
*) (prssdp
+ 1);
972 memset(features
, 0, sizeof(struct dasd_rssd_features
));
975 ccw
->cmd_code
= DASD_ECKD_CCW_RSSD
;
976 ccw
->count
= sizeof(struct dasd_rssd_features
);
977 ccw
->cda
= (__u32
)(addr_t
) features
;
979 cqr
->buildclk
= get_clock();
980 cqr
->status
= DASD_CQR_FILLED
;
981 rc
= dasd_sleep_on(cqr
);
983 prssdp
= (struct dasd_psf_prssd_data
*) cqr
->data
;
984 features
= (struct dasd_rssd_features
*) (prssdp
+ 1);
985 memcpy(&private->features
, features
,
986 sizeof(struct dasd_rssd_features
));
988 dev_warn(&device
->cdev
->dev
, "Reading device feature codes"
989 " failed with rc=%d\n", rc
);
990 dasd_sfree_request(cqr
, cqr
->memdev
);
996 * Build CP for Perform Subsystem Function - SSC.
998 static struct dasd_ccw_req
*dasd_eckd_build_psf_ssc(struct dasd_device
*device
,
1001 struct dasd_ccw_req
*cqr
;
1002 struct dasd_psf_ssc_data
*psf_ssc_data
;
1005 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1 /* PSF */ ,
1006 sizeof(struct dasd_psf_ssc_data
),
1010 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
1011 "Could not allocate PSF-SSC request");
1014 psf_ssc_data
= (struct dasd_psf_ssc_data
*)cqr
->data
;
1015 psf_ssc_data
->order
= PSF_ORDER_SSC
;
1016 psf_ssc_data
->suborder
= 0xc0;
1018 psf_ssc_data
->suborder
|= 0x08;
1019 psf_ssc_data
->reserved
[0] = 0x88;
1022 ccw
->cmd_code
= DASD_ECKD_CCW_PSF
;
1023 ccw
->cda
= (__u32
)(addr_t
)psf_ssc_data
;
1026 cqr
->startdev
= device
;
1027 cqr
->memdev
= device
;
1030 cqr
->expires
= 10*HZ
;
1031 cqr
->buildclk
= get_clock();
1032 cqr
->status
= DASD_CQR_FILLED
;
1037 * Perform Subsystem Function.
1038 * It is necessary to trigger CIO for channel revalidation since this
1039 * call might change behaviour of DASD devices.
1042 dasd_eckd_psf_ssc(struct dasd_device
*device
, int enable_pav
)
1044 struct dasd_ccw_req
*cqr
;
1047 cqr
= dasd_eckd_build_psf_ssc(device
, enable_pav
);
1049 return PTR_ERR(cqr
);
1051 rc
= dasd_sleep_on(cqr
);
1053 /* trigger CIO to reprobe devices */
1054 css_schedule_reprobe();
1055 dasd_sfree_request(cqr
, cqr
->memdev
);
1060 * Valide storage server of current device.
1062 static void dasd_eckd_validate_server(struct dasd_device
*device
)
1065 struct dasd_eckd_private
*private;
1068 if (dasd_nopav
|| MACHINE_IS_VM
)
1072 rc
= dasd_eckd_psf_ssc(device
, enable_pav
);
1074 /* may be requested feature is not available on server,
1075 * therefore just report error and go ahead */
1076 private = (struct dasd_eckd_private
*) device
->private;
1077 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
, "PSF-SSC for SSID %04x "
1078 "returned rc=%d", private->uid
.ssid
, rc
);
1082 * Check device characteristics.
1083 * If the device is accessible using ECKD discipline, the device is enabled.
1086 dasd_eckd_check_characteristics(struct dasd_device
*device
)
1088 struct dasd_eckd_private
*private;
1089 struct dasd_block
*block
;
1092 if (!ccw_device_is_pathgroup(device
->cdev
)) {
1093 dev_warn(&device
->cdev
->dev
,
1094 "A channel path group could not be established\n");
1097 if (!ccw_device_is_multipath(device
->cdev
)) {
1098 dev_info(&device
->cdev
->dev
,
1099 "The DASD is not operating in multipath mode\n");
1101 private = (struct dasd_eckd_private
*) device
->private;
1103 private = kzalloc(sizeof(*private), GFP_KERNEL
| GFP_DMA
);
1105 dev_warn(&device
->cdev
->dev
,
1106 "Allocating memory for private DASD data "
1110 device
->private = (void *) private;
1112 memset(private, 0, sizeof(*private));
1114 /* Invalidate status of initial analysis. */
1115 private->init_cqr_status
= -1;
1116 /* Set default cache operations. */
1117 private->attrib
.operation
= DASD_NORMAL_CACHE
;
1118 private->attrib
.nr_cyl
= 0;
1120 /* Read Configuration Data */
1121 rc
= dasd_eckd_read_conf(device
);
1125 /* Generate device unique id and register in devmap */
1126 rc
= dasd_eckd_generate_uid(device
, &private->uid
);
1129 dasd_set_uid(device
->cdev
, &private->uid
);
1131 if (private->uid
.type
== UA_BASE_DEVICE
) {
1132 block
= dasd_alloc_block();
1133 if (IS_ERR(block
)) {
1134 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
, "%s",
1135 "could not allocate dasd "
1137 rc
= PTR_ERR(block
);
1140 device
->block
= block
;
1141 block
->base
= device
;
1144 /* register lcu with alias handling, enable PAV if this is a new lcu */
1145 is_known
= dasd_alias_make_device_known_to_lcu(device
);
1151 * dasd_eckd_vaildate_server is done on the first device that
1152 * is found for an LCU. All later other devices have to wait
1153 * for it, so they will read the correct feature codes.
1156 dasd_eckd_validate_server(device
);
1157 dasd_alias_lcu_setup_complete(device
);
1159 dasd_alias_wait_for_lcu_setup(device
);
1161 /* device may report different configuration data after LCU setup */
1162 rc
= dasd_eckd_read_conf(device
);
1166 /* Read Feature Codes */
1167 dasd_eckd_read_features(device
);
1169 /* Read Device Characteristics */
1170 rc
= dasd_generic_read_dev_chars(device
, DASD_ECKD_MAGIC
,
1171 &private->rdc_data
, 64);
1173 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
,
1174 "Read device characteristic failed, rc=%d", rc
);
1177 /* find the vaild cylinder size */
1178 if (private->rdc_data
.no_cyl
== LV_COMPAT_CYL
&&
1179 private->rdc_data
.long_no_cyl
)
1180 private->real_cyl
= private->rdc_data
.long_no_cyl
;
1182 private->real_cyl
= private->rdc_data
.no_cyl
;
1184 dev_info(&device
->cdev
->dev
, "New DASD %04X/%02X (CU %04X/%02X) "
1185 "with %d cylinders, %d heads, %d sectors\n",
1186 private->rdc_data
.dev_type
,
1187 private->rdc_data
.dev_model
,
1188 private->rdc_data
.cu_type
,
1189 private->rdc_data
.cu_model
.model
,
1191 private->rdc_data
.trk_per_cyl
,
1192 private->rdc_data
.sec_per_trk
);
1196 dasd_alias_disconnect_device_from_lcu(device
);
1198 dasd_free_block(device
->block
);
1199 device
->block
= NULL
;
1201 kfree(private->conf_data
);
1202 kfree(device
->private);
1203 device
->private = NULL
;
1207 static void dasd_eckd_uncheck_device(struct dasd_device
*device
)
1209 struct dasd_eckd_private
*private;
1211 private = (struct dasd_eckd_private
*) device
->private;
1212 dasd_alias_disconnect_device_from_lcu(device
);
1213 private->ned
= NULL
;
1214 private->sneq
= NULL
;
1215 private->vdsneq
= NULL
;
1216 private->gneq
= NULL
;
1217 private->conf_len
= 0;
1218 kfree(private->conf_data
);
1219 private->conf_data
= NULL
;
1222 static struct dasd_ccw_req
*
1223 dasd_eckd_analysis_ccw(struct dasd_device
*device
)
1225 struct dasd_eckd_private
*private;
1226 struct eckd_count
*count_data
;
1227 struct LO_eckd_data
*LO_data
;
1228 struct dasd_ccw_req
*cqr
;
1230 int cplength
, datasize
;
1233 private = (struct dasd_eckd_private
*) device
->private;
1236 datasize
= sizeof(struct DE_eckd_data
) + 2*sizeof(struct LO_eckd_data
);
1237 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, cplength
, datasize
, device
);
1241 /* Define extent for the first 3 tracks. */
1242 define_extent(ccw
++, cqr
->data
, 0, 2,
1243 DASD_ECKD_CCW_READ_COUNT
, device
);
1244 LO_data
= cqr
->data
+ sizeof(struct DE_eckd_data
);
1245 /* Locate record for the first 4 records on track 0. */
1246 ccw
[-1].flags
|= CCW_FLAG_CC
;
1247 locate_record(ccw
++, LO_data
++, 0, 0, 4,
1248 DASD_ECKD_CCW_READ_COUNT
, device
, 0);
1250 count_data
= private->count_area
;
1251 for (i
= 0; i
< 4; i
++) {
1252 ccw
[-1].flags
|= CCW_FLAG_CC
;
1253 ccw
->cmd_code
= DASD_ECKD_CCW_READ_COUNT
;
1256 ccw
->cda
= (__u32
)(addr_t
) count_data
;
1261 /* Locate record for the first record on track 2. */
1262 ccw
[-1].flags
|= CCW_FLAG_CC
;
1263 locate_record(ccw
++, LO_data
++, 2, 0, 1,
1264 DASD_ECKD_CCW_READ_COUNT
, device
, 0);
1265 /* Read count ccw. */
1266 ccw
[-1].flags
|= CCW_FLAG_CC
;
1267 ccw
->cmd_code
= DASD_ECKD_CCW_READ_COUNT
;
1270 ccw
->cda
= (__u32
)(addr_t
) count_data
;
1273 cqr
->startdev
= device
;
1274 cqr
->memdev
= device
;
1276 cqr
->buildclk
= get_clock();
1277 cqr
->status
= DASD_CQR_FILLED
;
1281 /* differentiate between 'no record found' and any other error */
1282 static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req
*init_cqr
)
1285 if (init_cqr
->status
== DASD_CQR_DONE
)
1287 else if (init_cqr
->status
== DASD_CQR_NEED_ERP
||
1288 init_cqr
->status
== DASD_CQR_FAILED
) {
1289 sense
= dasd_get_sense(&init_cqr
->irb
);
1290 if (sense
&& (sense
[1] & SNS1_NO_REC_FOUND
))
1291 return INIT_CQR_UNFORMATTED
;
1293 return INIT_CQR_ERROR
;
1295 return INIT_CQR_ERROR
;
1299 * This is the callback function for the init_analysis cqr. It saves
1300 * the status of the initial analysis ccw before it frees it and kicks
1301 * the device to continue the startup sequence. This will call
1302 * dasd_eckd_do_analysis again (if the devices has not been marked
1303 * for deletion in the meantime).
1305 static void dasd_eckd_analysis_callback(struct dasd_ccw_req
*init_cqr
,
1308 struct dasd_eckd_private
*private;
1309 struct dasd_device
*device
;
1311 device
= init_cqr
->startdev
;
1312 private = (struct dasd_eckd_private
*) device
->private;
1313 private->init_cqr_status
= dasd_eckd_analysis_evaluation(init_cqr
);
1314 dasd_sfree_request(init_cqr
, device
);
1315 dasd_kick_device(device
);
1318 static int dasd_eckd_start_analysis(struct dasd_block
*block
)
1320 struct dasd_eckd_private
*private;
1321 struct dasd_ccw_req
*init_cqr
;
1323 private = (struct dasd_eckd_private
*) block
->base
->private;
1324 init_cqr
= dasd_eckd_analysis_ccw(block
->base
);
1325 if (IS_ERR(init_cqr
))
1326 return PTR_ERR(init_cqr
);
1327 init_cqr
->callback
= dasd_eckd_analysis_callback
;
1328 init_cqr
->callback_data
= NULL
;
1329 init_cqr
->expires
= 5*HZ
;
1330 /* first try without ERP, so we can later handle unformatted
1331 * devices as special case
1333 clear_bit(DASD_CQR_FLAGS_USE_ERP
, &init_cqr
->flags
);
1334 init_cqr
->retries
= 0;
1335 dasd_add_request_head(init_cqr
);
1339 static int dasd_eckd_end_analysis(struct dasd_block
*block
)
1341 struct dasd_device
*device
;
1342 struct dasd_eckd_private
*private;
1343 struct eckd_count
*count_area
;
1344 unsigned int sb
, blk_per_trk
;
1346 struct dasd_ccw_req
*init_cqr
;
1348 device
= block
->base
;
1349 private = (struct dasd_eckd_private
*) device
->private;
1350 status
= private->init_cqr_status
;
1351 private->init_cqr_status
= -1;
1352 if (status
== INIT_CQR_ERROR
) {
1353 /* try again, this time with full ERP */
1354 init_cqr
= dasd_eckd_analysis_ccw(device
);
1355 dasd_sleep_on(init_cqr
);
1356 status
= dasd_eckd_analysis_evaluation(init_cqr
);
1357 dasd_sfree_request(init_cqr
, device
);
1360 if (status
== INIT_CQR_UNFORMATTED
) {
1361 dev_warn(&device
->cdev
->dev
, "The DASD is not formatted\n");
1362 return -EMEDIUMTYPE
;
1363 } else if (status
== INIT_CQR_ERROR
) {
1364 dev_err(&device
->cdev
->dev
,
1365 "Detecting the DASD disk layout failed because "
1366 "of an I/O error\n");
1370 private->uses_cdl
= 1;
1371 /* Check Track 0 for Compatible Disk Layout */
1373 for (i
= 0; i
< 3; i
++) {
1374 if (private->count_area
[i
].kl
!= 4 ||
1375 private->count_area
[i
].dl
!= dasd_eckd_cdl_reclen(i
) - 4) {
1376 private->uses_cdl
= 0;
1381 count_area
= &private->count_area
[4];
1383 if (private->uses_cdl
== 0) {
1384 for (i
= 0; i
< 5; i
++) {
1385 if ((private->count_area
[i
].kl
!= 0) ||
1386 (private->count_area
[i
].dl
!=
1387 private->count_area
[0].dl
))
1391 count_area
= &private->count_area
[0];
1393 if (private->count_area
[3].record
== 1)
1394 dev_warn(&device
->cdev
->dev
,
1395 "Track 0 has no records following the VTOC\n");
1397 if (count_area
!= NULL
&& count_area
->kl
== 0) {
1398 /* we found notthing violating our disk layout */
1399 if (dasd_check_blocksize(count_area
->dl
) == 0)
1400 block
->bp_block
= count_area
->dl
;
1402 if (block
->bp_block
== 0) {
1403 dev_warn(&device
->cdev
->dev
,
1404 "The disk layout of the DASD is not supported\n");
1405 return -EMEDIUMTYPE
;
1407 block
->s2b_shift
= 0; /* bits to shift 512 to get a block */
1408 for (sb
= 512; sb
< block
->bp_block
; sb
= sb
<< 1)
1411 blk_per_trk
= recs_per_track(&private->rdc_data
, 0, block
->bp_block
);
1412 block
->blocks
= (private->real_cyl
*
1413 private->rdc_data
.trk_per_cyl
*
1416 dev_info(&device
->cdev
->dev
,
1417 "DASD with %d KB/block, %d KB total size, %d KB/track, "
1418 "%s\n", (block
->bp_block
>> 10),
1419 ((private->real_cyl
*
1420 private->rdc_data
.trk_per_cyl
*
1421 blk_per_trk
* (block
->bp_block
>> 9)) >> 1),
1422 ((blk_per_trk
* block
->bp_block
) >> 10),
1424 "compatible disk layout" : "linux disk layout");
1429 static int dasd_eckd_do_analysis(struct dasd_block
*block
)
1431 struct dasd_eckd_private
*private;
1433 private = (struct dasd_eckd_private
*) block
->base
->private;
1434 if (private->init_cqr_status
< 0)
1435 return dasd_eckd_start_analysis(block
);
1437 return dasd_eckd_end_analysis(block
);
1440 static int dasd_eckd_ready_to_online(struct dasd_device
*device
)
1442 return dasd_alias_add_device(device
);
1445 static int dasd_eckd_online_to_ready(struct dasd_device
*device
)
1447 return dasd_alias_remove_device(device
);
1451 dasd_eckd_fill_geometry(struct dasd_block
*block
, struct hd_geometry
*geo
)
1453 struct dasd_eckd_private
*private;
1455 private = (struct dasd_eckd_private
*) block
->base
->private;
1456 if (dasd_check_blocksize(block
->bp_block
) == 0) {
1457 geo
->sectors
= recs_per_track(&private->rdc_data
,
1458 0, block
->bp_block
);
1460 geo
->cylinders
= private->rdc_data
.no_cyl
;
1461 geo
->heads
= private->rdc_data
.trk_per_cyl
;
1465 static struct dasd_ccw_req
*
1466 dasd_eckd_format_device(struct dasd_device
* device
,
1467 struct format_data_t
* fdata
)
1469 struct dasd_eckd_private
*private;
1470 struct dasd_ccw_req
*fcp
;
1471 struct eckd_count
*ect
;
1475 struct ch_t address
;
1476 int cplength
, datasize
;
1481 private = (struct dasd_eckd_private
*) device
->private;
1482 rpt
= recs_per_track(&private->rdc_data
, 0, fdata
->blksize
);
1484 fdata
->start_unit
/ private->rdc_data
.trk_per_cyl
,
1485 fdata
->start_unit
% private->rdc_data
.trk_per_cyl
);
1487 /* Sanity checks. */
1488 if (fdata
->start_unit
>=
1489 (private->real_cyl
* private->rdc_data
.trk_per_cyl
)) {
1490 dev_warn(&device
->cdev
->dev
, "Start track number %d used in "
1491 "formatting is too big\n", fdata
->start_unit
);
1492 return ERR_PTR(-EINVAL
);
1494 if (fdata
->start_unit
> fdata
->stop_unit
) {
1495 dev_warn(&device
->cdev
->dev
, "Start track %d used in "
1496 "formatting exceeds end track\n", fdata
->start_unit
);
1497 return ERR_PTR(-EINVAL
);
1499 if (dasd_check_blocksize(fdata
->blksize
) != 0) {
1500 dev_warn(&device
->cdev
->dev
,
1501 "The DASD cannot be formatted with block size %d\n",
1503 return ERR_PTR(-EINVAL
);
1507 * fdata->intensity is a bit string that tells us what to do:
1508 * Bit 0: write record zero
1509 * Bit 1: write home address, currently not supported
1510 * Bit 2: invalidate tracks
1511 * Bit 3: use OS/390 compatible disk layout (cdl)
1512 * Bit 4: do not allow storage subsystem to modify record zero
1513 * Only some bit combinations do make sense.
1515 if (fdata
->intensity
& 0x10) {
1517 intensity
= fdata
->intensity
& ~0x10;
1520 intensity
= fdata
->intensity
;
1522 switch (intensity
) {
1523 case 0x00: /* Normal format */
1524 case 0x08: /* Normal format, use cdl. */
1526 datasize
= sizeof(struct DE_eckd_data
) +
1527 sizeof(struct LO_eckd_data
) +
1528 rpt
* sizeof(struct eckd_count
);
1530 case 0x01: /* Write record zero and format track. */
1531 case 0x09: /* Write record zero and format track, use cdl. */
1533 datasize
= sizeof(struct DE_eckd_data
) +
1534 sizeof(struct LO_eckd_data
) +
1535 sizeof(struct eckd_count
) +
1536 rpt
* sizeof(struct eckd_count
);
1538 case 0x04: /* Invalidate track. */
1539 case 0x0c: /* Invalidate track, use cdl. */
1541 datasize
= sizeof(struct DE_eckd_data
) +
1542 sizeof(struct LO_eckd_data
) +
1543 sizeof(struct eckd_count
);
1546 dev_warn(&device
->cdev
->dev
, "An I/O control call used "
1547 "incorrect flags 0x%x\n", fdata
->intensity
);
1548 return ERR_PTR(-EINVAL
);
1550 /* Allocate the format ccw request. */
1551 fcp
= dasd_smalloc_request(DASD_ECKD_MAGIC
, cplength
, datasize
, device
);
1558 switch (intensity
& ~0x08) {
1559 case 0x00: /* Normal format. */
1560 define_extent(ccw
++, (struct DE_eckd_data
*) data
,
1561 fdata
->start_unit
, fdata
->start_unit
,
1562 DASD_ECKD_CCW_WRITE_CKD
, device
);
1563 /* grant subsystem permission to format R0 */
1565 ((struct DE_eckd_data
*)data
)->ga_extended
|= 0x04;
1566 data
+= sizeof(struct DE_eckd_data
);
1567 ccw
[-1].flags
|= CCW_FLAG_CC
;
1568 locate_record(ccw
++, (struct LO_eckd_data
*) data
,
1569 fdata
->start_unit
, 0, rpt
,
1570 DASD_ECKD_CCW_WRITE_CKD
, device
,
1572 data
+= sizeof(struct LO_eckd_data
);
1574 case 0x01: /* Write record zero + format track. */
1575 define_extent(ccw
++, (struct DE_eckd_data
*) data
,
1576 fdata
->start_unit
, fdata
->start_unit
,
1577 DASD_ECKD_CCW_WRITE_RECORD_ZERO
,
1579 data
+= sizeof(struct DE_eckd_data
);
1580 ccw
[-1].flags
|= CCW_FLAG_CC
;
1581 locate_record(ccw
++, (struct LO_eckd_data
*) data
,
1582 fdata
->start_unit
, 0, rpt
+ 1,
1583 DASD_ECKD_CCW_WRITE_RECORD_ZERO
, device
,
1584 device
->block
->bp_block
);
1585 data
+= sizeof(struct LO_eckd_data
);
1587 case 0x04: /* Invalidate track. */
1588 define_extent(ccw
++, (struct DE_eckd_data
*) data
,
1589 fdata
->start_unit
, fdata
->start_unit
,
1590 DASD_ECKD_CCW_WRITE_CKD
, device
);
1591 data
+= sizeof(struct DE_eckd_data
);
1592 ccw
[-1].flags
|= CCW_FLAG_CC
;
1593 locate_record(ccw
++, (struct LO_eckd_data
*) data
,
1594 fdata
->start_unit
, 0, 1,
1595 DASD_ECKD_CCW_WRITE_CKD
, device
, 8);
1596 data
+= sizeof(struct LO_eckd_data
);
1599 if (intensity
& 0x01) { /* write record zero */
1600 ect
= (struct eckd_count
*) data
;
1601 data
+= sizeof(struct eckd_count
);
1602 ect
->cyl
= address
.cyl
;
1603 ect
->head
= address
.head
;
1607 ccw
[-1].flags
|= CCW_FLAG_CC
;
1608 ccw
->cmd_code
= DASD_ECKD_CCW_WRITE_RECORD_ZERO
;
1609 ccw
->flags
= CCW_FLAG_SLI
;
1611 ccw
->cda
= (__u32
)(addr_t
) ect
;
1614 if ((intensity
& ~0x08) & 0x04) { /* erase track */
1615 ect
= (struct eckd_count
*) data
;
1616 data
+= sizeof(struct eckd_count
);
1617 ect
->cyl
= address
.cyl
;
1618 ect
->head
= address
.head
;
1622 ccw
[-1].flags
|= CCW_FLAG_CC
;
1623 ccw
->cmd_code
= DASD_ECKD_CCW_WRITE_CKD
;
1624 ccw
->flags
= CCW_FLAG_SLI
;
1626 ccw
->cda
= (__u32
)(addr_t
) ect
;
1627 } else { /* write remaining records */
1628 for (i
= 0; i
< rpt
; i
++) {
1629 ect
= (struct eckd_count
*) data
;
1630 data
+= sizeof(struct eckd_count
);
1631 ect
->cyl
= address
.cyl
;
1632 ect
->head
= address
.head
;
1633 ect
->record
= i
+ 1;
1635 ect
->dl
= fdata
->blksize
;
1636 /* Check for special tracks 0-1 when formatting CDL */
1637 if ((intensity
& 0x08) &&
1638 fdata
->start_unit
== 0) {
1641 ect
->dl
= sizes_trk0
[i
] - 4;
1644 if ((intensity
& 0x08) &&
1645 fdata
->start_unit
== 1) {
1647 ect
->dl
= LABEL_SIZE
- 44;
1649 ccw
[-1].flags
|= CCW_FLAG_CC
;
1650 ccw
->cmd_code
= DASD_ECKD_CCW_WRITE_CKD
;
1651 ccw
->flags
= CCW_FLAG_SLI
;
1653 ccw
->cda
= (__u32
)(addr_t
) ect
;
1657 fcp
->startdev
= device
;
1658 fcp
->memdev
= device
;
1660 fcp
->buildclk
= get_clock();
1661 fcp
->status
= DASD_CQR_FILLED
;
1665 static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req
*cqr
)
1667 cqr
->status
= DASD_CQR_FILLED
;
1668 if (cqr
->block
&& (cqr
->startdev
!= cqr
->block
->base
)) {
1669 dasd_eckd_reset_ccw_to_base_io(cqr
);
1670 cqr
->startdev
= cqr
->block
->base
;
1674 static dasd_erp_fn_t
1675 dasd_eckd_erp_action(struct dasd_ccw_req
* cqr
)
1677 struct dasd_device
*device
= (struct dasd_device
*) cqr
->startdev
;
1678 struct ccw_device
*cdev
= device
->cdev
;
1680 switch (cdev
->id
.cu_type
) {
1685 return dasd_3990_erp_action
;
1689 return dasd_default_erp_action
;
1693 static dasd_erp_fn_t
1694 dasd_eckd_erp_postaction(struct dasd_ccw_req
* cqr
)
1696 return dasd_default_erp_postaction
;
1700 static void dasd_eckd_handle_unsolicited_interrupt(struct dasd_device
*device
,
1706 /* first of all check for state change pending interrupt */
1707 mask
= DEV_STAT_ATTENTION
| DEV_STAT_DEV_END
| DEV_STAT_UNIT_EXCEP
;
1708 if ((scsw_dstat(&irb
->scsw
) & mask
) == mask
) {
1709 dasd_generic_handle_state_change(device
);
1713 /* summary unit check */
1714 if ((scsw_dstat(&irb
->scsw
) & DEV_STAT_UNIT_CHECK
) &&
1715 (irb
->ecw
[7] == 0x0D)) {
1716 dasd_alias_handle_summary_unit_check(device
, irb
);
1720 sense
= dasd_get_sense(irb
);
1721 /* service information message SIM */
1722 if (sense
&& !(sense
[27] & DASD_SENSE_BIT_0
) &&
1723 ((sense
[6] & DASD_SIM_SENSE
) == DASD_SIM_SENSE
)) {
1724 dasd_3990_erp_handle_sim(device
, sense
);
1725 dasd_schedule_device_bh(device
);
1729 if ((scsw_cc(&irb
->scsw
) == 1) &&
1730 (scsw_fctl(&irb
->scsw
) & SCSW_FCTL_START_FUNC
) &&
1731 (scsw_actl(&irb
->scsw
) & SCSW_ACTL_START_PEND
) &&
1732 (scsw_stctl(&irb
->scsw
) & SCSW_STCTL_STATUS_PEND
)) {
1733 /* fake irb do nothing, they are handled elsewhere */
1734 dasd_schedule_device_bh(device
);
1739 /* just report other unsolicited interrupts */
1740 DBF_DEV_EVENT(DBF_ERR
, device
, "%s",
1741 "unsolicited interrupt received");
1743 DBF_DEV_EVENT(DBF_ERR
, device
, "%s",
1744 "unsolicited interrupt received "
1745 "(sense available)");
1746 device
->discipline
->dump_sense_dbf(device
, irb
, "unsolicited");
1749 dasd_schedule_device_bh(device
);
1754 static struct dasd_ccw_req
*dasd_eckd_build_cp_cmd_single(
1755 struct dasd_device
*startdev
,
1756 struct dasd_block
*block
,
1757 struct request
*req
,
1762 unsigned int first_offs
,
1763 unsigned int last_offs
,
1764 unsigned int blk_per_trk
,
1765 unsigned int blksize
)
1767 struct dasd_eckd_private
*private;
1768 unsigned long *idaws
;
1769 struct LO_eckd_data
*LO_data
;
1770 struct dasd_ccw_req
*cqr
;
1772 struct req_iterator iter
;
1776 int count
, cidaw
, cplength
, datasize
;
1778 unsigned char cmd
, rcmd
;
1780 struct dasd_device
*basedev
;
1782 basedev
= block
->base
;
1783 private = (struct dasd_eckd_private
*) basedev
->private;
1784 if (rq_data_dir(req
) == READ
)
1785 cmd
= DASD_ECKD_CCW_READ_MT
;
1786 else if (rq_data_dir(req
) == WRITE
)
1787 cmd
= DASD_ECKD_CCW_WRITE_MT
;
1789 return ERR_PTR(-EINVAL
);
1791 /* Check struct bio and count the number of blocks for the request. */
1794 rq_for_each_segment(bv
, req
, iter
) {
1795 if (bv
->bv_len
& (blksize
- 1))
1796 /* Eckd can only do full blocks. */
1797 return ERR_PTR(-EINVAL
);
1798 count
+= bv
->bv_len
>> (block
->s2b_shift
+ 9);
1799 #if defined(CONFIG_64BIT)
1800 if (idal_is_needed (page_address(bv
->bv_page
), bv
->bv_len
))
1801 cidaw
+= bv
->bv_len
>> (block
->s2b_shift
+ 9);
1805 if (count
!= last_rec
- first_rec
+ 1)
1806 return ERR_PTR(-EINVAL
);
1808 /* use the prefix command if available */
1809 use_prefix
= private->features
.feature
[8] & 0x01;
1811 /* 1x prefix + number of blocks */
1812 cplength
= 2 + count
;
1813 /* 1x prefix + cidaws*sizeof(long) */
1814 datasize
= sizeof(struct PFX_eckd_data
) +
1815 sizeof(struct LO_eckd_data
) +
1816 cidaw
* sizeof(unsigned long);
1818 /* 1x define extent + 1x locate record + number of blocks */
1819 cplength
= 2 + count
;
1820 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */
1821 datasize
= sizeof(struct DE_eckd_data
) +
1822 sizeof(struct LO_eckd_data
) +
1823 cidaw
* sizeof(unsigned long);
1825 /* Find out the number of additional locate record ccws for cdl. */
1826 if (private->uses_cdl
&& first_rec
< 2*blk_per_trk
) {
1827 if (last_rec
>= 2*blk_per_trk
)
1828 count
= 2*blk_per_trk
- first_rec
;
1830 datasize
+= count
*sizeof(struct LO_eckd_data
);
1832 /* Allocate the ccw request. */
1833 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, cplength
, datasize
,
1838 /* First ccw is define extent or prefix. */
1840 if (prefix(ccw
++, cqr
->data
, first_trk
,
1841 last_trk
, cmd
, basedev
, startdev
) == -EAGAIN
) {
1842 /* Clock not in sync and XRC is enabled.
1845 dasd_sfree_request(cqr
, startdev
);
1846 return ERR_PTR(-EAGAIN
);
1848 idaws
= (unsigned long *) (cqr
->data
+
1849 sizeof(struct PFX_eckd_data
));
1851 if (define_extent(ccw
++, cqr
->data
, first_trk
,
1852 last_trk
, cmd
, startdev
) == -EAGAIN
) {
1853 /* Clock not in sync and XRC is enabled.
1856 dasd_sfree_request(cqr
, startdev
);
1857 return ERR_PTR(-EAGAIN
);
1859 idaws
= (unsigned long *) (cqr
->data
+
1860 sizeof(struct DE_eckd_data
));
1862 /* Build locate_record+read/write/ccws. */
1863 LO_data
= (struct LO_eckd_data
*) (idaws
+ cidaw
);
1865 if (private->uses_cdl
== 0 || recid
> 2*blk_per_trk
) {
1866 /* Only standard blocks so there is just one locate record. */
1867 ccw
[-1].flags
|= CCW_FLAG_CC
;
1868 locate_record(ccw
++, LO_data
++, first_trk
, first_offs
+ 1,
1869 last_rec
- recid
+ 1, cmd
, basedev
, blksize
);
1871 rq_for_each_segment(bv
, req
, iter
) {
1872 dst
= page_address(bv
->bv_page
) + bv
->bv_offset
;
1873 if (dasd_page_cache
) {
1874 char *copy
= kmem_cache_alloc(dasd_page_cache
,
1875 GFP_DMA
| __GFP_NOWARN
);
1876 if (copy
&& rq_data_dir(req
) == WRITE
)
1877 memcpy(copy
+ bv
->bv_offset
, dst
, bv
->bv_len
);
1879 dst
= copy
+ bv
->bv_offset
;
1881 for (off
= 0; off
< bv
->bv_len
; off
+= blksize
) {
1882 sector_t trkid
= recid
;
1883 unsigned int recoffs
= sector_div(trkid
, blk_per_trk
);
1886 /* Locate record for cdl special block ? */
1887 if (private->uses_cdl
&& recid
< 2*blk_per_trk
) {
1888 if (dasd_eckd_cdl_special(blk_per_trk
, recid
)){
1890 count
= dasd_eckd_cdl_reclen(recid
);
1891 if (count
< blksize
&&
1892 rq_data_dir(req
) == READ
)
1893 memset(dst
+ count
, 0xe5,
1896 ccw
[-1].flags
|= CCW_FLAG_CC
;
1897 locate_record(ccw
++, LO_data
++,
1899 1, rcmd
, basedev
, count
);
1901 /* Locate record for standard blocks ? */
1902 if (private->uses_cdl
&& recid
== 2*blk_per_trk
) {
1903 ccw
[-1].flags
|= CCW_FLAG_CC
;
1904 locate_record(ccw
++, LO_data
++,
1906 last_rec
- recid
+ 1,
1907 cmd
, basedev
, count
);
1909 /* Read/write ccw. */
1910 ccw
[-1].flags
|= CCW_FLAG_CC
;
1911 ccw
->cmd_code
= rcmd
;
1913 if (idal_is_needed(dst
, blksize
)) {
1914 ccw
->cda
= (__u32
)(addr_t
) idaws
;
1915 ccw
->flags
= CCW_FLAG_IDA
;
1916 idaws
= idal_create_words(idaws
, dst
, blksize
);
1918 ccw
->cda
= (__u32
)(addr_t
) dst
;
1926 if (blk_noretry_request(req
) ||
1927 block
->base
->features
& DASD_FEATURE_FAILFAST
)
1928 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
1929 cqr
->startdev
= startdev
;
1930 cqr
->memdev
= startdev
;
1932 cqr
->expires
= 5 * 60 * HZ
; /* 5 minutes */
1933 cqr
->lpm
= private->path_data
.ppm
;
1935 cqr
->buildclk
= get_clock();
1936 cqr
->status
= DASD_CQR_FILLED
;
1940 static struct dasd_ccw_req
*dasd_eckd_build_cp_cmd_track(
1941 struct dasd_device
*startdev
,
1942 struct dasd_block
*block
,
1943 struct request
*req
,
1948 unsigned int first_offs
,
1949 unsigned int last_offs
,
1950 unsigned int blk_per_trk
,
1951 unsigned int blksize
)
1953 struct dasd_eckd_private
*private;
1954 unsigned long *idaws
;
1955 struct dasd_ccw_req
*cqr
;
1957 struct req_iterator iter
;
1959 char *dst
, *idaw_dst
;
1960 unsigned int cidaw
, cplength
, datasize
;
1964 struct dasd_device
*basedev
;
1965 unsigned int trkcount
, count
, count_to_trk_end
;
1966 unsigned int idaw_len
, seg_len
, part_len
, len_to_track_end
;
1967 unsigned char new_track
, end_idaw
;
1969 unsigned int recoffs
;
1971 basedev
= block
->base
;
1972 private = (struct dasd_eckd_private
*) basedev
->private;
1973 if (rq_data_dir(req
) == READ
)
1974 cmd
= DASD_ECKD_CCW_READ_TRACK_DATA
;
1975 else if (rq_data_dir(req
) == WRITE
)
1976 cmd
= DASD_ECKD_CCW_WRITE_TRACK_DATA
;
1978 return ERR_PTR(-EINVAL
);
1980 /* Track based I/O needs IDAWs for each page, and not just for
1981 * 64 bit addresses. We need additional idals for pages
1982 * that get filled from two tracks, so we use the number
1983 * of records as upper limit.
1985 cidaw
= last_rec
- first_rec
+ 1;
1986 trkcount
= last_trk
- first_trk
+ 1;
1988 /* 1x prefix + one read/write ccw per track */
1989 cplength
= 1 + trkcount
;
1991 /* on 31-bit we need space for two 32 bit addresses per page
1992 * on 64-bit one 64 bit address
1994 datasize
= sizeof(struct PFX_eckd_data
) +
1995 cidaw
* sizeof(unsigned long long);
1997 /* Allocate the ccw request. */
1998 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, cplength
, datasize
,
2003 /* transfer length factor: how many bytes to read from the last track */
2004 if (first_trk
== last_trk
)
2005 tlf
= last_offs
- first_offs
+ 1;
2007 tlf
= last_offs
+ 1;
2010 if (prefix_LRE(ccw
++, cqr
->data
, first_trk
,
2011 last_trk
, cmd
, basedev
, startdev
,
2012 1 /* format */, first_offs
+ 1,
2015 /* Clock not in sync and XRC is enabled.
2018 dasd_sfree_request(cqr
, startdev
);
2019 return ERR_PTR(-EAGAIN
);
2023 * The translation of request into ccw programs must meet the
2024 * following conditions:
2025 * - all idaws but the first and the last must address full pages
2026 * (or 2K blocks on 31-bit)
2027 * - the scope of a ccw and it's idal ends with the track boundaries
2029 idaws
= (unsigned long *) (cqr
->data
+ sizeof(struct PFX_eckd_data
));
2033 len_to_track_end
= 0;
2036 rq_for_each_segment(bv
, req
, iter
) {
2037 dst
= page_address(bv
->bv_page
) + bv
->bv_offset
;
2038 seg_len
= bv
->bv_len
;
2042 recoffs
= sector_div(trkid
, blk_per_trk
);
2043 count_to_trk_end
= blk_per_trk
- recoffs
;
2044 count
= min((last_rec
- recid
+ 1),
2045 (sector_t
)count_to_trk_end
);
2046 len_to_track_end
= count
* blksize
;
2047 ccw
[-1].flags
|= CCW_FLAG_CC
;
2048 ccw
->cmd_code
= cmd
;
2049 ccw
->count
= len_to_track_end
;
2050 ccw
->cda
= (__u32
)(addr_t
)idaws
;
2051 ccw
->flags
= CCW_FLAG_IDA
;
2055 /* first idaw for a ccw may start anywhere */
2059 /* If we start a new idaw, we must make sure that it
2060 * starts on an IDA_BLOCK_SIZE boundary.
2061 * If we continue an idaw, we must make sure that the
2062 * current segment begins where the so far accumulated
2066 if (__pa(dst
) & (IDA_BLOCK_SIZE
-1)) {
2067 dasd_sfree_request(cqr
, startdev
);
2068 return ERR_PTR(-ERANGE
);
2072 if ((idaw_dst
+ idaw_len
) != dst
) {
2073 dasd_sfree_request(cqr
, startdev
);
2074 return ERR_PTR(-ERANGE
);
2076 part_len
= min(seg_len
, len_to_track_end
);
2077 seg_len
-= part_len
;
2079 idaw_len
+= part_len
;
2080 len_to_track_end
-= part_len
;
2081 /* collected memory area ends on an IDA_BLOCK border,
2083 * idal_create_words will handle cases where idaw_len
2084 * is larger then IDA_BLOCK_SIZE
2086 if (!(__pa(idaw_dst
+ idaw_len
) & (IDA_BLOCK_SIZE
-1)))
2088 /* We also need to end the idaw at track end */
2089 if (!len_to_track_end
) {
2094 idaws
= idal_create_words(idaws
, idaw_dst
,
2103 if (blk_noretry_request(req
) ||
2104 block
->base
->features
& DASD_FEATURE_FAILFAST
)
2105 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
2106 cqr
->startdev
= startdev
;
2107 cqr
->memdev
= startdev
;
2109 cqr
->expires
= 5 * 60 * HZ
; /* 5 minutes */
2110 cqr
->lpm
= private->path_data
.ppm
;
2112 cqr
->buildclk
= get_clock();
2113 cqr
->status
= DASD_CQR_FILLED
;
2117 static int prepare_itcw(struct itcw
*itcw
,
2118 unsigned int trk
, unsigned int totrk
, int cmd
,
2119 struct dasd_device
*basedev
,
2120 struct dasd_device
*startdev
,
2121 unsigned int rec_on_trk
, int count
,
2122 unsigned int blksize
,
2123 unsigned int total_data_size
,
2125 unsigned int blk_per_trk
)
2127 struct PFX_eckd_data pfxdata
;
2128 struct dasd_eckd_private
*basepriv
, *startpriv
;
2129 struct DE_eckd_data
*dedata
;
2130 struct LRE_eckd_data
*lredata
;
2134 u16 heads
, beghead
, endhead
;
2142 /* setup prefix data */
2143 basepriv
= (struct dasd_eckd_private
*) basedev
->private;
2144 startpriv
= (struct dasd_eckd_private
*) startdev
->private;
2145 dedata
= &pfxdata
.define_extent
;
2146 lredata
= &pfxdata
.locate_record
;
2148 memset(&pfxdata
, 0, sizeof(pfxdata
));
2149 pfxdata
.format
= 1; /* PFX with LRE */
2150 pfxdata
.base_address
= basepriv
->ned
->unit_addr
;
2151 pfxdata
.base_lss
= basepriv
->ned
->ID
;
2152 pfxdata
.validity
.define_extent
= 1;
2154 /* private uid is kept up to date, conf_data may be outdated */
2155 if (startpriv
->uid
.type
!= UA_BASE_DEVICE
) {
2156 pfxdata
.validity
.verify_base
= 1;
2157 if (startpriv
->uid
.type
== UA_HYPER_PAV_ALIAS
)
2158 pfxdata
.validity
.hyper_pav
= 1;
2162 case DASD_ECKD_CCW_READ_TRACK_DATA
:
2163 dedata
->mask
.perm
= 0x1;
2164 dedata
->attributes
.operation
= basepriv
->attrib
.operation
;
2165 dedata
->blk_size
= blksize
;
2166 dedata
->ga_extended
|= 0x42;
2167 lredata
->operation
.orientation
= 0x0;
2168 lredata
->operation
.operation
= 0x0C;
2169 lredata
->auxiliary
.check_bytes
= 0x01;
2170 pfx_cmd
= DASD_ECKD_CCW_PFX_READ
;
2172 case DASD_ECKD_CCW_WRITE_TRACK_DATA
:
2173 dedata
->mask
.perm
= 0x02;
2174 dedata
->attributes
.operation
= basepriv
->attrib
.operation
;
2175 dedata
->blk_size
= blksize
;
2176 rc
= check_XRC_on_prefix(&pfxdata
, basedev
);
2177 dedata
->ga_extended
|= 0x42;
2178 lredata
->operation
.orientation
= 0x0;
2179 lredata
->operation
.operation
= 0x3F;
2180 lredata
->extended_operation
= 0x23;
2181 lredata
->auxiliary
.check_bytes
= 0x2;
2182 pfx_cmd
= DASD_ECKD_CCW_PFX
;
2185 DBF_DEV_EVENT(DBF_ERR
, basedev
,
2186 "prepare itcw, unknown opcode 0x%x", cmd
);
2193 dedata
->attributes
.mode
= 0x3; /* ECKD */
2195 heads
= basepriv
->rdc_data
.trk_per_cyl
;
2196 begcyl
= trk
/ heads
;
2197 beghead
= trk
% heads
;
2198 endcyl
= totrk
/ heads
;
2199 endhead
= totrk
% heads
;
2201 /* check for sequential prestage - enhance cylinder range */
2202 if (dedata
->attributes
.operation
== DASD_SEQ_PRESTAGE
||
2203 dedata
->attributes
.operation
== DASD_SEQ_ACCESS
) {
2205 if (endcyl
+ basepriv
->attrib
.nr_cyl
< basepriv
->real_cyl
)
2206 endcyl
+= basepriv
->attrib
.nr_cyl
;
2208 endcyl
= (basepriv
->real_cyl
- 1);
2211 set_ch_t(&dedata
->beg_ext
, begcyl
, beghead
);
2212 set_ch_t(&dedata
->end_ext
, endcyl
, endhead
);
2214 dedata
->ep_format
= 0x20; /* records per track is valid */
2215 dedata
->ep_rec_per_track
= blk_per_trk
;
2218 switch (basepriv
->rdc_data
.dev_type
) {
2220 dn
= ceil_quot(blksize
+ 6, 232);
2221 d
= 9 + ceil_quot(blksize
+ 6 * (dn
+ 1), 34);
2222 sector
= (49 + (rec_on_trk
- 1) * (10 + d
)) / 8;
2225 d
= 7 + ceil_quot(blksize
+ 12, 32);
2226 sector
= (39 + (rec_on_trk
- 1) * (8 + d
)) / 7;
2231 lredata
->auxiliary
.length_valid
= 1;
2232 lredata
->auxiliary
.length_scope
= 1;
2233 lredata
->auxiliary
.imbedded_ccw_valid
= 1;
2234 lredata
->length
= tlf
;
2235 lredata
->imbedded_ccw
= cmd
;
2236 lredata
->count
= count
;
2237 lredata
->sector
= sector
;
2238 set_ch_t(&lredata
->seek_addr
, begcyl
, beghead
);
2239 lredata
->search_arg
.cyl
= lredata
->seek_addr
.cyl
;
2240 lredata
->search_arg
.head
= lredata
->seek_addr
.head
;
2241 lredata
->search_arg
.record
= rec_on_trk
;
2243 dcw
= itcw_add_dcw(itcw
, pfx_cmd
, 0,
2244 &pfxdata
, sizeof(pfxdata
), total_data_size
);
2249 static struct dasd_ccw_req
*dasd_eckd_build_cp_tpm_track(
2250 struct dasd_device
*startdev
,
2251 struct dasd_block
*block
,
2252 struct request
*req
,
2257 unsigned int first_offs
,
2258 unsigned int last_offs
,
2259 unsigned int blk_per_trk
,
2260 unsigned int blksize
)
2262 struct dasd_eckd_private
*private;
2263 struct dasd_ccw_req
*cqr
;
2264 struct req_iterator iter
;
2267 unsigned int trkcount
, ctidaw
;
2269 struct dasd_device
*basedev
;
2272 struct tidaw
*last_tidaw
= NULL
;
2276 basedev
= block
->base
;
2277 private = (struct dasd_eckd_private
*) basedev
->private;
2278 if (rq_data_dir(req
) == READ
) {
2279 cmd
= DASD_ECKD_CCW_READ_TRACK_DATA
;
2280 itcw_op
= ITCW_OP_READ
;
2281 } else if (rq_data_dir(req
) == WRITE
) {
2282 cmd
= DASD_ECKD_CCW_WRITE_TRACK_DATA
;
2283 itcw_op
= ITCW_OP_WRITE
;
2285 return ERR_PTR(-EINVAL
);
2287 /* trackbased I/O needs address all memory via TIDAWs,
2288 * not just for 64 bit addresses. This allows us to map
2289 * each segment directly to one tidaw.
2291 trkcount
= last_trk
- first_trk
+ 1;
2293 rq_for_each_segment(bv
, req
, iter
) {
2297 /* Allocate the ccw request. */
2298 itcw_size
= itcw_calc_size(0, ctidaw
, 0);
2299 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 0, itcw_size
, startdev
);
2304 cqr
->startdev
= startdev
;
2305 cqr
->memdev
= startdev
;
2307 cqr
->expires
= 100*HZ
;
2308 cqr
->buildclk
= get_clock();
2309 cqr
->status
= DASD_CQR_FILLED
;
2312 /* transfer length factor: how many bytes to read from the last track */
2313 if (first_trk
== last_trk
)
2314 tlf
= last_offs
- first_offs
+ 1;
2316 tlf
= last_offs
+ 1;
2319 itcw
= itcw_init(cqr
->data
, itcw_size
, itcw_op
, 0, ctidaw
, 0);
2320 cqr
->cpaddr
= itcw_get_tcw(itcw
);
2322 if (prepare_itcw(itcw
, first_trk
, last_trk
,
2323 cmd
, basedev
, startdev
,
2326 (last_rec
- first_rec
+ 1) * blksize
,
2327 tlf
, blk_per_trk
) == -EAGAIN
) {
2328 /* Clock not in sync and XRC is enabled.
2331 dasd_sfree_request(cqr
, startdev
);
2332 return ERR_PTR(-EAGAIN
);
2336 * A tidaw can address 4k of memory, but must not cross page boundaries
2337 * We can let the block layer handle this by setting
2338 * blk_queue_segment_boundary to page boundaries and
2339 * blk_max_segment_size to page size when setting up the request queue.
2341 rq_for_each_segment(bv
, req
, iter
) {
2342 dst
= page_address(bv
->bv_page
) + bv
->bv_offset
;
2343 last_tidaw
= itcw_add_tidaw(itcw
, 0x00, dst
, bv
->bv_len
);
2344 if (IS_ERR(last_tidaw
))
2345 return (struct dasd_ccw_req
*)last_tidaw
;
2348 last_tidaw
->flags
|= 0x80;
2349 itcw_finalize(itcw
);
2351 if (blk_noretry_request(req
) ||
2352 block
->base
->features
& DASD_FEATURE_FAILFAST
)
2353 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
2354 cqr
->startdev
= startdev
;
2355 cqr
->memdev
= startdev
;
2357 cqr
->expires
= 5 * 60 * HZ
; /* 5 minutes */
2358 cqr
->lpm
= private->path_data
.ppm
;
2360 cqr
->buildclk
= get_clock();
2361 cqr
->status
= DASD_CQR_FILLED
;
2365 static struct dasd_ccw_req
*dasd_eckd_build_cp(struct dasd_device
*startdev
,
2366 struct dasd_block
*block
,
2367 struct request
*req
)
2369 int tpm
, cmdrtd
, cmdwtd
;
2371 #if defined(CONFIG_64BIT)
2372 int fcx_in_css
, fcx_in_gneq
, fcx_in_features
;
2374 struct dasd_eckd_private
*private;
2375 struct dasd_device
*basedev
;
2376 sector_t first_rec
, last_rec
;
2377 sector_t first_trk
, last_trk
;
2378 unsigned int first_offs
, last_offs
;
2379 unsigned int blk_per_trk
, blksize
;
2381 struct dasd_ccw_req
*cqr
;
2383 basedev
= block
->base
;
2384 private = (struct dasd_eckd_private
*) basedev
->private;
2386 /* Calculate number of blocks/records per track. */
2387 blksize
= block
->bp_block
;
2388 blk_per_trk
= recs_per_track(&private->rdc_data
, 0, blksize
);
2389 if (blk_per_trk
== 0)
2390 return ERR_PTR(-EINVAL
);
2391 /* Calculate record id of first and last block. */
2392 first_rec
= first_trk
= blk_rq_pos(req
) >> block
->s2b_shift
;
2393 first_offs
= sector_div(first_trk
, blk_per_trk
);
2394 last_rec
= last_trk
=
2395 (blk_rq_pos(req
) + blk_rq_sectors(req
) - 1) >> block
->s2b_shift
;
2396 last_offs
= sector_div(last_trk
, blk_per_trk
);
2397 cdlspecial
= (private->uses_cdl
&& first_rec
< 2*blk_per_trk
);
2399 /* is transport mode supported? */
2400 #if defined(CONFIG_64BIT)
2401 fcx_in_css
= css_general_characteristics
.fcx
;
2402 fcx_in_gneq
= private->gneq
->reserved2
[7] & 0x04;
2403 fcx_in_features
= private->features
.feature
[40] & 0x80;
2404 tpm
= fcx_in_css
&& fcx_in_gneq
&& fcx_in_features
;
2409 /* is read track data and write track data in command mode supported? */
2410 cmdrtd
= private->features
.feature
[9] & 0x20;
2411 cmdwtd
= private->features
.feature
[12] & 0x40;
2412 use_prefix
= private->features
.feature
[8] & 0x01;
2415 if (cdlspecial
|| dasd_page_cache
) {
2416 /* do nothing, just fall through to the cmd mode single case */
2417 } else if (!dasd_nofcx
&& tpm
&& (first_trk
== last_trk
)) {
2418 cqr
= dasd_eckd_build_cp_tpm_track(startdev
, block
, req
,
2419 first_rec
, last_rec
,
2420 first_trk
, last_trk
,
2421 first_offs
, last_offs
,
2422 blk_per_trk
, blksize
);
2423 if (IS_ERR(cqr
) && PTR_ERR(cqr
) != -EAGAIN
)
2425 } else if (use_prefix
&&
2426 (((rq_data_dir(req
) == READ
) && cmdrtd
) ||
2427 ((rq_data_dir(req
) == WRITE
) && cmdwtd
))) {
2428 cqr
= dasd_eckd_build_cp_cmd_track(startdev
, block
, req
,
2429 first_rec
, last_rec
,
2430 first_trk
, last_trk
,
2431 first_offs
, last_offs
,
2432 blk_per_trk
, blksize
);
2433 if (IS_ERR(cqr
) && PTR_ERR(cqr
) != -EAGAIN
)
2437 cqr
= dasd_eckd_build_cp_cmd_single(startdev
, block
, req
,
2438 first_rec
, last_rec
,
2439 first_trk
, last_trk
,
2440 first_offs
, last_offs
,
2441 blk_per_trk
, blksize
);
2446 dasd_eckd_free_cp(struct dasd_ccw_req
*cqr
, struct request
*req
)
2448 struct dasd_eckd_private
*private;
2450 struct req_iterator iter
;
2453 unsigned int blksize
, blk_per_trk
, off
;
2457 if (!dasd_page_cache
)
2459 private = (struct dasd_eckd_private
*) cqr
->block
->base
->private;
2460 blksize
= cqr
->block
->bp_block
;
2461 blk_per_trk
= recs_per_track(&private->rdc_data
, 0, blksize
);
2462 recid
= blk_rq_pos(req
) >> cqr
->block
->s2b_shift
;
2464 /* Skip over define extent & locate record. */
2466 if (private->uses_cdl
== 0 || recid
> 2*blk_per_trk
)
2468 rq_for_each_segment(bv
, req
, iter
) {
2469 dst
= page_address(bv
->bv_page
) + bv
->bv_offset
;
2470 for (off
= 0; off
< bv
->bv_len
; off
+= blksize
) {
2471 /* Skip locate record. */
2472 if (private->uses_cdl
&& recid
<= 2*blk_per_trk
)
2475 if (ccw
->flags
& CCW_FLAG_IDA
)
2476 cda
= *((char **)((addr_t
) ccw
->cda
));
2478 cda
= (char *)((addr_t
) ccw
->cda
);
2480 if (rq_data_dir(req
) == READ
)
2481 memcpy(dst
, cda
, bv
->bv_len
);
2482 kmem_cache_free(dasd_page_cache
,
2483 (void *)((addr_t
)cda
& PAGE_MASK
));
2492 status
= cqr
->status
== DASD_CQR_DONE
;
2493 dasd_sfree_request(cqr
, cqr
->memdev
);
2498 * Modify ccw/tcw in cqr so it can be started on a base device.
2500 * Note that this is not enough to restart the cqr!
2501 * Either reset cqr->startdev as well (summary unit check handling)
2502 * or restart via separate cqr (as in ERP handling).
2504 void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req
*cqr
)
2507 struct PFX_eckd_data
*pfxdata
;
2512 if (cqr
->cpmode
== 1) {
2514 tccb
= tcw_get_tccb(tcw
);
2515 dcw
= (struct dcw
*)&tccb
->tca
[0];
2516 pfxdata
= (struct PFX_eckd_data
*)&dcw
->cd
[0];
2517 pfxdata
->validity
.verify_base
= 0;
2518 pfxdata
->validity
.hyper_pav
= 0;
2521 pfxdata
= cqr
->data
;
2522 if (ccw
->cmd_code
== DASD_ECKD_CCW_PFX
) {
2523 pfxdata
->validity
.verify_base
= 0;
2524 pfxdata
->validity
.hyper_pav
= 0;
2529 #define DASD_ECKD_CHANQ_MAX_SIZE 4
2531 static struct dasd_ccw_req
*dasd_eckd_build_alias_cp(struct dasd_device
*base
,
2532 struct dasd_block
*block
,
2533 struct request
*req
)
2535 struct dasd_eckd_private
*private;
2536 struct dasd_device
*startdev
;
2537 unsigned long flags
;
2538 struct dasd_ccw_req
*cqr
;
2540 startdev
= dasd_alias_get_start_dev(base
);
2543 private = (struct dasd_eckd_private
*) startdev
->private;
2544 if (private->count
>= DASD_ECKD_CHANQ_MAX_SIZE
)
2545 return ERR_PTR(-EBUSY
);
2547 spin_lock_irqsave(get_ccwdev_lock(startdev
->cdev
), flags
);
2549 cqr
= dasd_eckd_build_cp(startdev
, block
, req
);
2552 spin_unlock_irqrestore(get_ccwdev_lock(startdev
->cdev
), flags
);
2556 static int dasd_eckd_free_alias_cp(struct dasd_ccw_req
*cqr
,
2557 struct request
*req
)
2559 struct dasd_eckd_private
*private;
2560 unsigned long flags
;
2562 spin_lock_irqsave(get_ccwdev_lock(cqr
->memdev
->cdev
), flags
);
2563 private = (struct dasd_eckd_private
*) cqr
->memdev
->private;
2565 spin_unlock_irqrestore(get_ccwdev_lock(cqr
->memdev
->cdev
), flags
);
2566 return dasd_eckd_free_cp(cqr
, req
);
2570 dasd_eckd_fill_info(struct dasd_device
* device
,
2571 struct dasd_information2_t
* info
)
2573 struct dasd_eckd_private
*private;
2575 private = (struct dasd_eckd_private
*) device
->private;
2576 info
->label_block
= 2;
2577 info
->FBA_layout
= private->uses_cdl
? 0 : 1;
2578 info
->format
= private->uses_cdl
? DASD_FORMAT_CDL
: DASD_FORMAT_LDL
;
2579 info
->characteristics_size
= sizeof(struct dasd_eckd_characteristics
);
2580 memcpy(info
->characteristics
, &private->rdc_data
,
2581 sizeof(struct dasd_eckd_characteristics
));
2582 info
->confdata_size
= min((unsigned long)private->conf_len
,
2583 sizeof(info
->configuration_data
));
2584 memcpy(info
->configuration_data
, private->conf_data
,
2585 info
->confdata_size
);
2590 * SECTION: ioctl functions for eckd devices.
2594 * Release device ioctl.
2595 * Buils a channel programm to releases a prior reserved
2596 * (see dasd_eckd_reserve) device.
2599 dasd_eckd_release(struct dasd_device
*device
)
2601 struct dasd_ccw_req
*cqr
;
2605 if (!capable(CAP_SYS_ADMIN
))
2608 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1, 32, device
);
2610 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
2611 "Could not allocate initialization request");
2612 return PTR_ERR(cqr
);
2615 ccw
->cmd_code
= DASD_ECKD_CCW_RELEASE
;
2616 ccw
->flags
|= CCW_FLAG_SLI
;
2618 ccw
->cda
= (__u32
)(addr_t
) cqr
->data
;
2619 cqr
->startdev
= device
;
2620 cqr
->memdev
= device
;
2621 clear_bit(DASD_CQR_FLAGS_USE_ERP
, &cqr
->flags
);
2622 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
2623 cqr
->retries
= 2; /* set retry counter to enable basic ERP */
2624 cqr
->expires
= 2 * HZ
;
2625 cqr
->buildclk
= get_clock();
2626 cqr
->status
= DASD_CQR_FILLED
;
2628 rc
= dasd_sleep_on_immediatly(cqr
);
2630 dasd_sfree_request(cqr
, cqr
->memdev
);
2635 * Reserve device ioctl.
2636 * Options are set to 'synchronous wait for interrupt' and
2637 * 'timeout the request'. This leads to a terminate IO if
2638 * the interrupt is outstanding for a certain time.
2641 dasd_eckd_reserve(struct dasd_device
*device
)
2643 struct dasd_ccw_req
*cqr
;
2647 if (!capable(CAP_SYS_ADMIN
))
2650 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1, 32, device
);
2652 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
2653 "Could not allocate initialization request");
2654 return PTR_ERR(cqr
);
2657 ccw
->cmd_code
= DASD_ECKD_CCW_RESERVE
;
2658 ccw
->flags
|= CCW_FLAG_SLI
;
2660 ccw
->cda
= (__u32
)(addr_t
) cqr
->data
;
2661 cqr
->startdev
= device
;
2662 cqr
->memdev
= device
;
2663 clear_bit(DASD_CQR_FLAGS_USE_ERP
, &cqr
->flags
);
2664 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
2665 cqr
->retries
= 2; /* set retry counter to enable basic ERP */
2666 cqr
->expires
= 2 * HZ
;
2667 cqr
->buildclk
= get_clock();
2668 cqr
->status
= DASD_CQR_FILLED
;
2670 rc
= dasd_sleep_on_immediatly(cqr
);
2672 dasd_sfree_request(cqr
, cqr
->memdev
);
2677 * Steal lock ioctl - unconditional reserve device.
2678 * Buils a channel programm to break a device's reservation.
2679 * (unconditional reserve)
2682 dasd_eckd_steal_lock(struct dasd_device
*device
)
2684 struct dasd_ccw_req
*cqr
;
2688 if (!capable(CAP_SYS_ADMIN
))
2691 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1, 32, device
);
2693 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
2694 "Could not allocate initialization request");
2695 return PTR_ERR(cqr
);
2698 ccw
->cmd_code
= DASD_ECKD_CCW_SLCK
;
2699 ccw
->flags
|= CCW_FLAG_SLI
;
2701 ccw
->cda
= (__u32
)(addr_t
) cqr
->data
;
2702 cqr
->startdev
= device
;
2703 cqr
->memdev
= device
;
2704 clear_bit(DASD_CQR_FLAGS_USE_ERP
, &cqr
->flags
);
2705 set_bit(DASD_CQR_FLAGS_FAILFAST
, &cqr
->flags
);
2706 cqr
->retries
= 2; /* set retry counter to enable basic ERP */
2707 cqr
->expires
= 2 * HZ
;
2708 cqr
->buildclk
= get_clock();
2709 cqr
->status
= DASD_CQR_FILLED
;
2711 rc
= dasd_sleep_on_immediatly(cqr
);
2713 dasd_sfree_request(cqr
, cqr
->memdev
);
2718 * Read performance statistics
2721 dasd_eckd_performance(struct dasd_device
*device
, void __user
*argp
)
2723 struct dasd_psf_prssd_data
*prssdp
;
2724 struct dasd_rssd_perf_stats_t
*stats
;
2725 struct dasd_ccw_req
*cqr
;
2729 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 1 /* PSF */ + 1 /* RSSD */,
2730 (sizeof(struct dasd_psf_prssd_data
) +
2731 sizeof(struct dasd_rssd_perf_stats_t
)),
2734 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
2735 "Could not allocate initialization request");
2736 return PTR_ERR(cqr
);
2738 cqr
->startdev
= device
;
2739 cqr
->memdev
= device
;
2741 clear_bit(DASD_CQR_FLAGS_USE_ERP
, &cqr
->flags
);
2742 cqr
->expires
= 10 * HZ
;
2744 /* Prepare for Read Subsystem Data */
2745 prssdp
= (struct dasd_psf_prssd_data
*) cqr
->data
;
2746 memset(prssdp
, 0, sizeof(struct dasd_psf_prssd_data
));
2747 prssdp
->order
= PSF_ORDER_PRSSD
;
2748 prssdp
->suborder
= 0x01; /* Performance Statistics */
2749 prssdp
->varies
[1] = 0x01; /* Perf Statistics for the Subsystem */
2752 ccw
->cmd_code
= DASD_ECKD_CCW_PSF
;
2753 ccw
->count
= sizeof(struct dasd_psf_prssd_data
);
2754 ccw
->flags
|= CCW_FLAG_CC
;
2755 ccw
->cda
= (__u32
)(addr_t
) prssdp
;
2757 /* Read Subsystem Data - Performance Statistics */
2758 stats
= (struct dasd_rssd_perf_stats_t
*) (prssdp
+ 1);
2759 memset(stats
, 0, sizeof(struct dasd_rssd_perf_stats_t
));
2762 ccw
->cmd_code
= DASD_ECKD_CCW_RSSD
;
2763 ccw
->count
= sizeof(struct dasd_rssd_perf_stats_t
);
2764 ccw
->cda
= (__u32
)(addr_t
) stats
;
2766 cqr
->buildclk
= get_clock();
2767 cqr
->status
= DASD_CQR_FILLED
;
2768 rc
= dasd_sleep_on(cqr
);
2770 prssdp
= (struct dasd_psf_prssd_data
*) cqr
->data
;
2771 stats
= (struct dasd_rssd_perf_stats_t
*) (prssdp
+ 1);
2772 if (copy_to_user(argp
, stats
,
2773 sizeof(struct dasd_rssd_perf_stats_t
)))
2776 dasd_sfree_request(cqr
, cqr
->memdev
);
2781 * Get attributes (cache operations)
2782 * Returnes the cache attributes used in Define Extend (DE).
2785 dasd_eckd_get_attrib(struct dasd_device
*device
, void __user
*argp
)
2787 struct dasd_eckd_private
*private =
2788 (struct dasd_eckd_private
*)device
->private;
2789 struct attrib_data_t attrib
= private->attrib
;
2792 if (!capable(CAP_SYS_ADMIN
))
2798 if (copy_to_user(argp
, (long *) &attrib
,
2799 sizeof(struct attrib_data_t
)))
2806 * Set attributes (cache operations)
2807 * Stores the attributes for cache operation to be used in Define Extend (DE).
2810 dasd_eckd_set_attrib(struct dasd_device
*device
, void __user
*argp
)
2812 struct dasd_eckd_private
*private =
2813 (struct dasd_eckd_private
*)device
->private;
2814 struct attrib_data_t attrib
;
2816 if (!capable(CAP_SYS_ADMIN
))
2821 if (copy_from_user(&attrib
, argp
, sizeof(struct attrib_data_t
)))
2823 private->attrib
= attrib
;
2825 dev_info(&device
->cdev
->dev
,
2826 "The DASD cache mode was set to %x (%i cylinder prestage)\n",
2827 private->attrib
.operation
, private->attrib
.nr_cyl
);
2832 * Issue syscall I/O to EMC Symmetrix array.
2833 * CCWs are PSF and RSSD
2835 static int dasd_symm_io(struct dasd_device
*device
, void __user
*argp
)
2837 struct dasd_symmio_parms usrparm
;
2838 char *psf_data
, *rssd_result
;
2839 struct dasd_ccw_req
*cqr
;
2843 /* Copy parms from caller */
2845 if (copy_from_user(&usrparm
, argp
, sizeof(usrparm
)))
2847 #ifndef CONFIG_64BIT
2848 /* Make sure pointers are sane even on 31 bit. */
2849 if ((usrparm
.psf_data
>> 32) != 0 || (usrparm
.rssd_result
>> 32) != 0) {
2854 /* alloc I/O data area */
2855 psf_data
= kzalloc(usrparm
.psf_data_len
, GFP_KERNEL
| GFP_DMA
);
2856 rssd_result
= kzalloc(usrparm
.rssd_result_len
, GFP_KERNEL
| GFP_DMA
);
2857 if (!psf_data
|| !rssd_result
) {
2862 /* get syscall header from user space */
2864 if (copy_from_user(psf_data
,
2865 (void __user
*)(unsigned long) usrparm
.psf_data
,
2866 usrparm
.psf_data_len
))
2869 /* sanity check on syscall header */
2870 if (psf_data
[0] != 0x17 && psf_data
[1] != 0xce) {
2875 /* setup CCWs for PSF + RSSD */
2876 cqr
= dasd_smalloc_request(DASD_ECKD_MAGIC
, 2 , 0, device
);
2878 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
2879 "Could not allocate initialization request");
2884 cqr
->startdev
= device
;
2885 cqr
->memdev
= device
;
2887 cqr
->expires
= 10 * HZ
;
2888 cqr
->buildclk
= get_clock();
2889 cqr
->status
= DASD_CQR_FILLED
;
2891 /* Build the ccws */
2895 ccw
->cmd_code
= DASD_ECKD_CCW_PSF
;
2896 ccw
->count
= usrparm
.psf_data_len
;
2897 ccw
->flags
|= CCW_FLAG_CC
;
2898 ccw
->cda
= (__u32
)(addr_t
) psf_data
;
2903 ccw
->cmd_code
= DASD_ECKD_CCW_RSSD
;
2904 ccw
->count
= usrparm
.rssd_result_len
;
2905 ccw
->flags
= CCW_FLAG_SLI
;
2906 ccw
->cda
= (__u32
)(addr_t
) rssd_result
;
2908 rc
= dasd_sleep_on(cqr
);
2913 if (copy_to_user((void __user
*)(unsigned long) usrparm
.rssd_result
,
2914 rssd_result
, usrparm
.rssd_result_len
))
2919 dasd_sfree_request(cqr
, cqr
->memdev
);
2924 DBF_DEV_EVENT(DBF_WARNING
, device
, "Symmetrix ioctl: rc=%d", rc
);
2929 dasd_eckd_ioctl(struct dasd_block
*block
, unsigned int cmd
, void __user
*argp
)
2931 struct dasd_device
*device
= block
->base
;
2935 return dasd_eckd_get_attrib(device
, argp
);
2937 return dasd_eckd_set_attrib(device
, argp
);
2939 return dasd_eckd_performance(device
, argp
);
2941 return dasd_eckd_release(device
);
2943 return dasd_eckd_reserve(device
);
2945 return dasd_eckd_steal_lock(device
);
2947 return dasd_symm_io(device
, argp
);
2949 return -ENOIOCTLCMD
;
2954 * Dump the range of CCWs into 'page' buffer
2955 * and return number of printed chars.
2958 dasd_eckd_dump_ccw_range(struct ccw1
*from
, struct ccw1
*to
, char *page
)
2964 while (from
<= to
) {
2965 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
2966 " CCW %p: %08X %08X DAT:",
2967 from
, ((int *) from
)[0], ((int *) from
)[1]);
2969 /* get pointer to data (consider IDALs) */
2970 if (from
->flags
& CCW_FLAG_IDA
)
2971 datap
= (char *) *((addr_t
*) (addr_t
) from
->cda
);
2973 datap
= (char *) ((addr_t
) from
->cda
);
2975 /* dump data (max 32 bytes) */
2976 for (count
= 0; count
< from
->count
&& count
< 32; count
++) {
2977 if (count
% 8 == 0) len
+= sprintf(page
+ len
, " ");
2978 if (count
% 4 == 0) len
+= sprintf(page
+ len
, " ");
2979 len
+= sprintf(page
+ len
, "%02x", datap
[count
]);
2981 len
+= sprintf(page
+ len
, "\n");
2988 dasd_eckd_dump_sense_dbf(struct dasd_device
*device
, struct irb
*irb
,
2993 sense
= (u64
*) dasd_get_sense(irb
);
2995 DBF_DEV_EVENT(DBF_EMERG
, device
,
2996 "%s: %s %02x%02x%02x %016llx %016llx %016llx "
2998 scsw_is_tm(&irb
->scsw
) ? "t" : "c",
2999 scsw_cc(&irb
->scsw
), scsw_cstat(&irb
->scsw
),
3000 scsw_dstat(&irb
->scsw
), sense
[0], sense
[1],
3001 sense
[2], sense
[3]);
3003 DBF_DEV_EVENT(DBF_EMERG
, device
, "%s",
3004 "SORRY - NO VALID SENSE AVAILABLE\n");
3009 * Print sense data and related channel program.
3010 * Parts are printed because printk buffer is only 1024 bytes.
3012 static void dasd_eckd_dump_sense_ccw(struct dasd_device
*device
,
3013 struct dasd_ccw_req
*req
, struct irb
*irb
)
3016 struct ccw1
*first
, *last
, *fail
, *from
, *to
;
3019 page
= (char *) get_zeroed_page(GFP_ATOMIC
);
3021 DBF_DEV_EVENT(DBF_WARNING
, device
, "%s",
3022 "No memory to dump sense data\n");
3025 /* dump the sense data */
3026 len
= sprintf(page
, KERN_ERR PRINTK_HEADER
3027 " I/O status report for device %s:\n",
3028 dev_name(&device
->cdev
->dev
));
3029 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3030 " in req: %p CS: 0x%02X DS: 0x%02X CC: 0x%02X RC: %d\n",
3031 req
, scsw_cstat(&irb
->scsw
), scsw_dstat(&irb
->scsw
),
3032 scsw_cc(&irb
->scsw
), req
->intrc
);
3033 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3034 " device %s: Failing CCW: %p\n",
3035 dev_name(&device
->cdev
->dev
),
3036 (void *) (addr_t
) irb
->scsw
.cmd
.cpa
);
3037 if (irb
->esw
.esw0
.erw
.cons
) {
3038 for (sl
= 0; sl
< 4; sl
++) {
3039 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3040 " Sense(hex) %2d-%2d:",
3041 (8 * sl
), ((8 * sl
) + 7));
3043 for (sct
= 0; sct
< 8; sct
++) {
3044 len
+= sprintf(page
+ len
, " %02x",
3045 irb
->ecw
[8 * sl
+ sct
]);
3047 len
+= sprintf(page
+ len
, "\n");
3050 if (irb
->ecw
[27] & DASD_SENSE_BIT_0
) {
3051 /* 24 Byte Sense Data */
3052 sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3053 " 24 Byte: %x MSG %x, "
3054 "%s MSGb to SYSOP\n",
3055 irb
->ecw
[7] >> 4, irb
->ecw
[7] & 0x0f,
3056 irb
->ecw
[1] & 0x10 ? "" : "no");
3058 /* 32 Byte Sense Data */
3059 sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3060 " 32 Byte: Format: %x "
3061 "Exception class %x\n",
3062 irb
->ecw
[6] & 0x0f, irb
->ecw
[22] >> 4);
3065 sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3066 " SORRY - NO VALID SENSE AVAILABLE\n");
3071 /* req == NULL for unsolicited interrupts */
3072 /* dump the Channel Program (max 140 Bytes per line) */
3073 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */
3074 first
= req
->cpaddr
;
3075 for (last
= first
; last
->flags
& (CCW_FLAG_CC
| CCW_FLAG_DC
); last
++);
3076 to
= min(first
+ 6, last
);
3077 len
= sprintf(page
, KERN_ERR PRINTK_HEADER
3078 " Related CP in req: %p\n", req
);
3079 dasd_eckd_dump_ccw_range(first
, to
, page
+ len
);
3082 /* print failing CCW area (maximum 4) */
3083 /* scsw->cda is either valid or zero */
3086 fail
= (struct ccw1
*)(addr_t
)
3087 irb
->scsw
.cmd
.cpa
; /* failing CCW */
3088 if (from
< fail
- 2) {
3089 from
= fail
- 2; /* there is a gap - print header */
3090 len
+= sprintf(page
, KERN_ERR PRINTK_HEADER
"......\n");
3092 to
= min(fail
+ 1, last
);
3093 len
+= dasd_eckd_dump_ccw_range(from
, to
, page
+ len
);
3095 /* print last CCWs (maximum 2) */
3096 from
= max(from
, ++to
);
3097 if (from
< last
- 1) {
3098 from
= last
- 1; /* there is a gap - print header */
3099 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
"......\n");
3101 len
+= dasd_eckd_dump_ccw_range(from
, last
, page
+ len
);
3105 free_page((unsigned long) page
);
3110 * Print sense data from a tcw.
3112 static void dasd_eckd_dump_sense_tcw(struct dasd_device
*device
,
3113 struct dasd_ccw_req
*req
, struct irb
*irb
)
3116 int len
, sl
, sct
, residual
;
3122 page
= (char *) get_zeroed_page(GFP_ATOMIC
);
3124 DBF_DEV_EVENT(DBF_WARNING
, device
, " %s",
3125 "No memory to dump sense data");
3128 /* dump the sense data */
3129 len
= sprintf(page
, KERN_ERR PRINTK_HEADER
3130 " I/O status report for device %s:\n",
3131 dev_name(&device
->cdev
->dev
));
3132 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3133 " in req: %p CS: 0x%02X DS: 0x%02X CC: 0x%02X RC: %d "
3134 "fcxs: 0x%02X schxs: 0x%02X\n", req
,
3135 scsw_cstat(&irb
->scsw
), scsw_dstat(&irb
->scsw
),
3136 scsw_cc(&irb
->scsw
), req
->intrc
,
3137 irb
->scsw
.tm
.fcxs
, irb
->scsw
.tm
.schxs
);
3138 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3139 " device %s: Failing TCW: %p\n",
3140 dev_name(&device
->cdev
->dev
),
3141 (void *) (addr_t
) irb
->scsw
.tm
.tcw
);
3145 if (irb
->scsw
.tm
.tcw
)
3147 (struct tcw
*)(unsigned long)irb
->scsw
.tm
.tcw
);
3149 if (tsb
&& (irb
->scsw
.tm
.fcxs
== 0x01)) {
3150 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3151 " tsb->length %d\n", tsb
->length
);
3152 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3153 " tsb->flags %x\n", tsb
->flags
);
3154 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3155 " tsb->dcw_offset %d\n", tsb
->dcw_offset
);
3156 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3157 " tsb->count %d\n", tsb
->count
);
3158 residual
= tsb
->count
- 28;
3159 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3160 " residual %d\n", residual
);
3162 switch (tsb
->flags
& 0x07) {
3163 case 1: /* tsa_iostat */
3164 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3165 " tsb->tsa.iostat.dev_time %d\n",
3166 tsb
->tsa
.iostat
.dev_time
);
3167 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3168 " tsb->tsa.iostat.def_time %d\n",
3169 tsb
->tsa
.iostat
.def_time
);
3170 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3171 " tsb->tsa.iostat.queue_time %d\n",
3172 tsb
->tsa
.iostat
.queue_time
);
3173 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3174 " tsb->tsa.iostat.dev_busy_time %d\n",
3175 tsb
->tsa
.iostat
.dev_busy_time
);
3176 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3177 " tsb->tsa.iostat.dev_act_time %d\n",
3178 tsb
->tsa
.iostat
.dev_act_time
);
3179 sense
= tsb
->tsa
.iostat
.sense
;
3181 case 2: /* ts_ddpc */
3182 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3183 " tsb->tsa.ddpc.rc %d\n", tsb
->tsa
.ddpc
.rc
);
3184 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3185 " tsb->tsa.ddpc.rcq: ");
3186 for (sl
= 0; sl
< 16; sl
++) {
3187 for (sct
= 0; sct
< 8; sct
++) {
3188 len
+= sprintf(page
+ len
, " %02x",
3189 tsb
->tsa
.ddpc
.rcq
[sl
]);
3191 len
+= sprintf(page
+ len
, "\n");
3193 sense
= tsb
->tsa
.ddpc
.sense
;
3195 case 3: /* tsa_intrg */
3196 len
+= sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3197 " tsb->tsa.intrg.: not supportet yet \n");
3202 for (sl
= 0; sl
< 4; sl
++) {
3203 len
+= sprintf(page
+ len
,
3204 KERN_ERR PRINTK_HEADER
3205 " Sense(hex) %2d-%2d:",
3206 (8 * sl
), ((8 * sl
) + 7));
3207 for (sct
= 0; sct
< 8; sct
++) {
3208 len
+= sprintf(page
+ len
, " %02x",
3209 sense
[8 * sl
+ sct
]);
3211 len
+= sprintf(page
+ len
, "\n");
3214 if (sense
[27] & DASD_SENSE_BIT_0
) {
3215 /* 24 Byte Sense Data */
3216 sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3217 " 24 Byte: %x MSG %x, "
3218 "%s MSGb to SYSOP\n",
3219 sense
[7] >> 4, sense
[7] & 0x0f,
3220 sense
[1] & 0x10 ? "" : "no");
3222 /* 32 Byte Sense Data */
3223 sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3224 " 32 Byte: Format: %x "
3225 "Exception class %x\n",
3226 sense
[6] & 0x0f, sense
[22] >> 4);
3229 sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3230 " SORRY - NO VALID SENSE AVAILABLE\n");
3233 sprintf(page
+ len
, KERN_ERR PRINTK_HEADER
3234 " SORRY - NO TSB DATA AVAILABLE\n");
3237 free_page((unsigned long) page
);
3240 static void dasd_eckd_dump_sense(struct dasd_device
*device
,
3241 struct dasd_ccw_req
*req
, struct irb
*irb
)
3243 if (req
&& scsw_is_tm(&req
->irb
.scsw
))
3244 dasd_eckd_dump_sense_tcw(device
, req
, irb
);
3246 dasd_eckd_dump_sense_ccw(device
, req
, irb
);
3249 int dasd_eckd_pm_freeze(struct dasd_device
*device
)
3252 * the device should be disconnected from our LCU structure
3253 * on restore we will reconnect it and reread LCU specific
3254 * information like PAV support that might have changed
3256 dasd_alias_remove_device(device
);
3257 dasd_alias_disconnect_device_from_lcu(device
);
3262 int dasd_eckd_restore_device(struct dasd_device
*device
)
3264 struct dasd_eckd_private
*private;
3265 struct dasd_eckd_characteristics temp_rdc_data
;
3267 struct dasd_uid temp_uid
;
3268 unsigned long flags
;
3270 private = (struct dasd_eckd_private
*) device
->private;
3272 /* Read Configuration Data */
3273 rc
= dasd_eckd_read_conf(device
);
3277 /* Generate device unique id and register in devmap */
3278 rc
= dasd_eckd_generate_uid(device
, &private->uid
);
3279 dasd_get_uid(device
->cdev
, &temp_uid
);
3280 if (memcmp(&private->uid
, &temp_uid
, sizeof(struct dasd_uid
)) != 0)
3281 dev_err(&device
->cdev
->dev
, "The UID of the DASD has "
3285 dasd_set_uid(device
->cdev
, &private->uid
);
3287 /* register lcu with alias handling, enable PAV if this is a new lcu */
3288 is_known
= dasd_alias_make_device_known_to_lcu(device
);
3292 dasd_eckd_validate_server(device
);
3293 dasd_alias_lcu_setup_complete(device
);
3295 dasd_alias_wait_for_lcu_setup(device
);
3297 /* RE-Read Configuration Data */
3298 rc
= dasd_eckd_read_conf(device
);
3302 /* Read Feature Codes */
3303 dasd_eckd_read_features(device
);
3305 /* Read Device Characteristics */
3306 rc
= dasd_generic_read_dev_chars(device
, DASD_ECKD_MAGIC
,
3307 &temp_rdc_data
, 64);
3309 DBF_EVENT_DEVID(DBF_WARNING
, device
->cdev
,
3310 "Read device characteristic failed, rc=%d", rc
);
3313 spin_lock_irqsave(get_ccwdev_lock(device
->cdev
), flags
);
3314 memcpy(&private->rdc_data
, &temp_rdc_data
, sizeof(temp_rdc_data
));
3315 spin_unlock_irqrestore(get_ccwdev_lock(device
->cdev
), flags
);
3317 /* add device to alias management */
3318 dasd_alias_add_device(device
);
3326 static struct ccw_driver dasd_eckd_driver
= {
3327 .name
= "dasd-eckd",
3328 .owner
= THIS_MODULE
,
3329 .ids
= dasd_eckd_ids
,
3330 .probe
= dasd_eckd_probe
,
3331 .remove
= dasd_generic_remove
,
3332 .set_offline
= dasd_generic_set_offline
,
3333 .set_online
= dasd_eckd_set_online
,
3334 .notify
= dasd_generic_notify
,
3335 .freeze
= dasd_generic_pm_freeze
,
3336 .thaw
= dasd_generic_restore_device
,
3337 .restore
= dasd_generic_restore_device
,
3341 * max_blocks is dependent on the amount of storage that is available
3342 * in the static io buffer for each device. Currently each device has
3343 * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has
3344 * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use
3345 * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In
3346 * addition we have one define extent ccw + 16 bytes of data and one
3347 * locate record ccw + 16 bytes of data. That makes:
3348 * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum.
3349 * We want to fit two into the available memory so that we can immediately
3350 * start the next request if one finishes off. That makes 249.5 blocks
3351 * for one request. Give a little safety and the result is 240.
3353 static struct dasd_discipline dasd_eckd_discipline
= {
3354 .owner
= THIS_MODULE
,
3358 .check_device
= dasd_eckd_check_characteristics
,
3359 .uncheck_device
= dasd_eckd_uncheck_device
,
3360 .do_analysis
= dasd_eckd_do_analysis
,
3361 .ready_to_online
= dasd_eckd_ready_to_online
,
3362 .online_to_ready
= dasd_eckd_online_to_ready
,
3363 .fill_geometry
= dasd_eckd_fill_geometry
,
3364 .start_IO
= dasd_start_IO
,
3365 .term_IO
= dasd_term_IO
,
3366 .handle_terminated_request
= dasd_eckd_handle_terminated_request
,
3367 .format_device
= dasd_eckd_format_device
,
3368 .erp_action
= dasd_eckd_erp_action
,
3369 .erp_postaction
= dasd_eckd_erp_postaction
,
3370 .handle_unsolicited_interrupt
= dasd_eckd_handle_unsolicited_interrupt
,
3371 .build_cp
= dasd_eckd_build_alias_cp
,
3372 .free_cp
= dasd_eckd_free_alias_cp
,
3373 .dump_sense
= dasd_eckd_dump_sense
,
3374 .dump_sense_dbf
= dasd_eckd_dump_sense_dbf
,
3375 .fill_info
= dasd_eckd_fill_info
,
3376 .ioctl
= dasd_eckd_ioctl
,
3377 .freeze
= dasd_eckd_pm_freeze
,
3378 .restore
= dasd_eckd_restore_device
,
3382 dasd_eckd_init(void)
3386 ASCEBC(dasd_eckd_discipline
.ebcname
, 4);
3387 ret
= ccw_driver_register(&dasd_eckd_driver
);
3389 wait_for_device_probe();
3395 dasd_eckd_cleanup(void)
3397 ccw_driver_unregister(&dasd_eckd_driver
);
3400 module_init(dasd_eckd_init
);
3401 module_exit(dasd_eckd_cleanup
);