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s390/mem_detect: Use IS_ENABLED(CONFIG_BLK_DEV_INITRD)
[linux-2.6-block.git] / drivers / s390 / block / dasd_eckd.c
CommitLineData
6a55d2cd 1// SPDX-License-Identifier: GPL-2.0
138c014d 2/*
1da177e4 3 * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
138c014d 4 * Horst Hummel <Horst.Hummel@de.ibm.com>
1da177e4
LT		 5 * Carsten Otte <Cotte@de.ibm.com>
6 * Martin Schwidefsky <schwidefsky@de.ibm.com>
7 * Bugreports.to..: <Linux390@de.ibm.com>
d41dd122 8 * Copyright IBM Corp. 1999, 2009
ab1d848f
NH		 9 * EMC Symmetrix ioctl Copyright EMC Corporation, 2008
10 * Author.........: Nigel Hislop <hislop_nigel@emc.com>
1da177e4
LT		 11 */
12
ca99dab0 13#define KMSG_COMPONENT "dasd-eckd"
fc19f381 14
1da177e4
LT		 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>
048cd4e5 21#include <linux/compat.h>
1da177e4 22#include <linux/init.h>
5a3b7b11 23#include <linux/seq_file.h>
1da177e4 24
382b7366 25#include <asm/css_chars.h>
1da177e4
LT		 26#include <asm/debug.h>
27#include <asm/idals.h>
28#include <asm/ebcdic.h>
29#include <asm/io.h>
7c0f6ba6 30#include <linux/uaccess.h>
40545573 31#include <asm/cio.h>
1da177e4 32#include <asm/ccwdev.h>
f3eb5384 33#include <asm/itcw.h>
5db8440c
SH		 34#include <asm/schid.h>
35#include <asm/chpid.h>
1da177e4
LT		 36
37#include "dasd_int.h"
38#include "dasd_eckd.h"
39
40#ifdef PRINTK_HEADER
41#undef PRINTK_HEADER
42#endif /* PRINTK_HEADER */
43#define PRINTK_HEADER "dasd(eckd):"
44
45#define ECKD_C0(i) (i->home_bytes)
46#define ECKD_F(i) (i->formula)
47#define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\
48 (i->factors.f_0x02.f1))
49#define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\
50 (i->factors.f_0x02.f2))
51#define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\
52 (i->factors.f_0x02.f3))
53#define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0)
54#define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0)
55#define ECKD_F6(i) (i->factor6)
56#define ECKD_F7(i) (i->factor7)
57#define ECKD_F8(i) (i->factor8)
58
e4dbb0f2
SH		 59/*
60 * raw track access always map to 64k in memory
61 * so it maps to 16 blocks of 4k per track
62 */
63#define DASD_RAW_BLOCK_PER_TRACK 16
64#define DASD_RAW_BLOCKSIZE 4096
65/* 64k are 128 x 512 byte sectors */
66#define DASD_RAW_SECTORS_PER_TRACK 128
67
1da177e4
LT		 68MODULE_LICENSE("GPL");
69
70static struct dasd_discipline dasd_eckd_discipline;
71
1da177e4
LT		 72/* The ccw bus type uses this table to find devices that it sends to
73 * dasd_eckd_probe */
74static struct ccw_device_id dasd_eckd_ids[] = {
d2c993d8
HC		 75 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1},
76 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2},
5da24b76 77 { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3380, 0), .driver_info = 0x3},
d2c993d8
HC		 78 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4},
79 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5},
80 { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6},
81 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7},
82 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8},
83 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9},
84 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa},
1da177e4
LT		 85 { /* end of list */ },
86};
87
88MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids);
89
90static struct ccw_driver dasd_eckd_driver; /* see below */
91
558b9ef0
SW		 92static void *rawpadpage;
93
eb6e199b
SW		 94#define INIT_CQR_OK 0
95#define INIT_CQR_UNFORMATTED 1
96#define INIT_CQR_ERROR 2
97
f932bcea
SW		 98/* emergency request for reserve/release */
99static struct {
100 struct dasd_ccw_req cqr;
101 struct ccw1 ccw;
102 char data[32];
103} *dasd_reserve_req;
104static DEFINE_MUTEX(dasd_reserve_mutex);
105
a4d26c6a
SW		 106/* definitions for the path verification worker */
107struct path_verification_work_data {
108 struct work_struct worker;
109 struct dasd_device *device;
110 struct dasd_ccw_req cqr;
111 struct ccw1 ccw;
112 __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE];
113 int isglobal;
114 __u8 tbvpm;
115};
116static struct path_verification_work_data *path_verification_worker;
117static DEFINE_MUTEX(dasd_path_verification_mutex);
eb6e199b 118
5db8440c
SH		 119struct check_attention_work_data {
120 struct work_struct worker;
121 struct dasd_device *device;
122 __u8 lpum;
123};
124
8fd57520
JH		 125static int prepare_itcw(struct itcw *, unsigned int, unsigned int, int,
126 struct dasd_device *, struct dasd_device *,
127 unsigned int, int, unsigned int, unsigned int,
128 unsigned int, unsigned int);
129
1da177e4
LT		 130/* initial attempt at a probe function. this can be simplified once
131 * the other detection code is gone */
132static int
133dasd_eckd_probe (struct ccw_device *cdev)
134{
135 int ret;
136
40545573 137 /* set ECKD specific ccw-device options */
454e1fa1
PO		 138 ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE |
139 CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH);
40545573 140 if (ret) {
b8ed5dd5
SH		 141 DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s",
142 "dasd_eckd_probe: could not set "
143 "ccw-device options");
1da177e4 144 return ret;
40545573
HH		 145 }
146 ret = dasd_generic_probe(cdev, &dasd_eckd_discipline);
147 return ret;
1da177e4
LT		 148}
149
150static int
151dasd_eckd_set_online(struct ccw_device *cdev)
152{
40545573 153 return dasd_generic_set_online(cdev, &dasd_eckd_discipline);
1da177e4
LT		 154}
155
1da177e4
LT		 156static const int sizes_trk0[] = { 28, 148, 84 };
157#define LABEL_SIZE 140
158
3bc9fef9
SH		 159/* head and record addresses of count_area read in analysis ccw */
160static const int count_area_head[] = { 0, 0, 0, 0, 2 };
161static const int count_area_rec[] = { 1, 2, 3, 4, 1 };
162
1da177e4
LT		 163static inline unsigned int
164round_up_multiple(unsigned int no, unsigned int mult)
165{
166 int rem = no % mult;
167 return (rem ? no - rem + mult : no);
168}
169
170static inline unsigned int
171ceil_quot(unsigned int d1, unsigned int d2)
172{
173 return (d1 + (d2 - 1)) / d2;
174}
175
4d284cac 176static unsigned int
1da177e4
LT		 177recs_per_track(struct dasd_eckd_characteristics * rdc,
178 unsigned int kl, unsigned int dl)
179{
180 int dn, kn;
181
182 switch (rdc->dev_type) {
183 case 0x3380:
184 if (kl)
185 return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) +
186 ceil_quot(dl + 12, 32));
187 else
188 return 1499 / (15 + ceil_quot(dl + 12, 32));
189 case 0x3390:
190 dn = ceil_quot(dl + 6, 232) + 1;
191 if (kl) {
192 kn = ceil_quot(kl + 6, 232) + 1;
193 return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) +
194 9 + ceil_quot(dl + 6 * dn, 34));
195 } else
196 return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34));
197 case 0x9345:
198 dn = ceil_quot(dl + 6, 232) + 1;
199 if (kl) {
200 kn = ceil_quot(kl + 6, 232) + 1;
201 return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) +
202 ceil_quot(dl + 6 * dn, 34));
203 } else
204 return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34));
205 }
206 return 0;
207}
208
b44b0ab3
SW		 209static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head)
210{
211 geo->cyl = (__u16) cyl;
212 geo->head = cyl >> 16;
213 geo->head <<= 4;
214 geo->head |= head;
215}
216
5628683c 217static int set_timestamp(struct ccw1 *ccw, struct DE_eckd_data *data,
45f186be 218 struct dasd_device *device)
1da177e4 219{
543691a4 220 struct dasd_eckd_private *private = device->private;
d54853ef 221 int rc;
1da177e4 222
5628683c
SH		 223 rc = get_phys_clock(&data->ep_sys_time);
224 /*
225 * Ignore return code if XRC is not supported or
226 * sync clock is switched off
227 */
228 if ((rc && !private->rdc_data.facilities.XRC_supported) ||
229 rc == -EOPNOTSUPP || rc == -EACCES)
d54853ef 230 return 0;
1da177e4 231
45f186be 232 /* switch on System Time Stamp - needed for XRC Support */
d54853ef
MS		 233 data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */
234 data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */
1da177e4 235
45f186be
JH		 236 if (ccw) {
237 ccw->count = sizeof(struct DE_eckd_data);
238 ccw->flags |= CCW_FLAG_SLI;
239 }
240
d54853ef
MS		 241 return rc;
242}
1da177e4 243
4d284cac 244static int
b44b0ab3 245define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk,
45f186be
JH		 246 unsigned int totrk, int cmd, struct dasd_device *device,
247 int blksize)
1da177e4 248{
543691a4 249 struct dasd_eckd_private *private = device->private;
b44b0ab3 250 u16 heads, beghead, endhead;
45f186be 251 u32 begcyl, endcyl;
d54853ef 252 int rc = 0;
1da177e4 253
45f186be
JH		 254 if (ccw) {
255 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT;
256 ccw->flags = 0;
257 ccw->count = 16;
258 ccw->cda = (__u32)__pa(data);
259 }
1da177e4 260
8e09f215 261 memset(data, 0, sizeof(struct DE_eckd_data));
1da177e4
LT		 262 switch (cmd) {
263 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
264 case DASD_ECKD_CCW_READ_RECORD_ZERO:
265 case DASD_ECKD_CCW_READ:
266 case DASD_ECKD_CCW_READ_MT:
267 case DASD_ECKD_CCW_READ_CKD:
268 case DASD_ECKD_CCW_READ_CKD_MT:
269 case DASD_ECKD_CCW_READ_KD:
270 case DASD_ECKD_CCW_READ_KD_MT:
1da177e4
LT		 271 data->mask.perm = 0x1;
272 data->attributes.operation = private->attrib.operation;
273 break;
8fd57520
JH		 274 case DASD_ECKD_CCW_READ_COUNT:
275 data->mask.perm = 0x1;
276 data->attributes.operation = DASD_BYPASS_CACHE;
277 break;
45f186be
JH		 278 case DASD_ECKD_CCW_READ_TRACK:
279 case DASD_ECKD_CCW_READ_TRACK_DATA:
280 data->mask.perm = 0x1;
281 data->attributes.operation = private->attrib.operation;
282 data->blk_size = 0;
283 break;
1da177e4
LT		 284 case DASD_ECKD_CCW_WRITE:
285 case DASD_ECKD_CCW_WRITE_MT:
286 case DASD_ECKD_CCW_WRITE_KD:
287 case DASD_ECKD_CCW_WRITE_KD_MT:
288 data->mask.perm = 0x02;
289 data->attributes.operation = private->attrib.operation;
5628683c 290 rc = set_timestamp(ccw, data, device);
1da177e4
LT		 291 break;
292 case DASD_ECKD_CCW_WRITE_CKD:
293 case DASD_ECKD_CCW_WRITE_CKD_MT:
294 data->attributes.operation = DASD_BYPASS_CACHE;
5628683c 295 rc = set_timestamp(ccw, data, device);
1da177e4
LT		 296 break;
297 case DASD_ECKD_CCW_ERASE:
298 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
299 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
300 data->mask.perm = 0x3;
301 data->mask.auth = 0x1;
302 data->attributes.operation = DASD_BYPASS_CACHE;
5628683c 303 rc = set_timestamp(ccw, data, device);
45f186be
JH		 304 break;
305 case DASD_ECKD_CCW_WRITE_FULL_TRACK:
306 data->mask.perm = 0x03;
307 data->attributes.operation = private->attrib.operation;
308 data->blk_size = 0;
309 break;
310 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
311 data->mask.perm = 0x02;
312 data->attributes.operation = private->attrib.operation;
313 data->blk_size = blksize;
5628683c 314 rc = set_timestamp(ccw, data, device);
1da177e4
LT		 315 break;
316 default:
fc19f381
SH		 317 dev_err(&device->cdev->dev,
318 "0x%x is not a known command\n", cmd);
1da177e4
LT		 319 break;
320 }
321
322 data->attributes.mode = 0x3; /* ECKD */
323
324 if ((private->rdc_data.cu_type == 0x2105 ||
325 private->rdc_data.cu_type == 0x2107 ||
326 private->rdc_data.cu_type == 0x1750)
327 && !(private->uses_cdl && trk < 2))
328 data->ga_extended |= 0x40; /* Regular Data Format Mode */
329
b44b0ab3
SW		 330 heads = private->rdc_data.trk_per_cyl;
331 begcyl = trk / heads;
332 beghead = trk % heads;
333 endcyl = totrk / heads;
334 endhead = totrk % heads;
1da177e4
LT		 335
336 /* check for sequential prestage - enhance cylinder range */
337 if (data->attributes.operation == DASD_SEQ_PRESTAGE ||
338 data->attributes.operation == DASD_SEQ_ACCESS) {
138c014d 339
b44b0ab3
SW		 340 if (endcyl + private->attrib.nr_cyl < private->real_cyl)
341 endcyl += private->attrib.nr_cyl;
1da177e4 342 else
b44b0ab3 343 endcyl = (private->real_cyl - 1);
1da177e4
LT		 344 }
345
b44b0ab3
SW		 346 set_ch_t(&data->beg_ext, begcyl, beghead);
347 set_ch_t(&data->end_ext, endcyl, endhead);
d54853ef 348 return rc;
1da177e4
LT		 349}
350
8e09f215 351
45f186be
JH		 352static void locate_record_ext(struct ccw1 *ccw, struct LRE_eckd_data *data,
353 unsigned int trk, unsigned int rec_on_trk,
354 int count, int cmd, struct dasd_device *device,
355 unsigned int reclen, unsigned int tlf)
f3eb5384 356{
543691a4 357 struct dasd_eckd_private *private = device->private;
f3eb5384
SW		 358 int sector;
359 int dn, d;
360
45f186be
JH		 361 if (ccw) {
362 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD_EXT;
363 ccw->flags = 0;
364 if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK)
365 ccw->count = 22;
366 else
367 ccw->count = 20;
368 ccw->cda = (__u32)__pa(data);
369 }
370
f3eb5384
SW		 371 memset(data, 0, sizeof(*data));
372 sector = 0;
373 if (rec_on_trk) {
374 switch (private->rdc_data.dev_type) {
375 case 0x3390:
376 dn = ceil_quot(reclen + 6, 232);
377 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
378 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
379 break;
380 case 0x3380:
381 d = 7 + ceil_quot(reclen + 12, 32);
382 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
383 break;
384 }
385 }
386 data->sector = sector;
387 /* note: meaning of count depends on the operation
388 * for record based I/O it's the number of records, but for
389 * track based I/O it's the number of tracks
390 */
391 data->count = count;
392 switch (cmd) {
393 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
394 data->operation.orientation = 0x3;
395 data->operation.operation = 0x03;
396 break;
397 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
398 data->operation.orientation = 0x3;
399 data->operation.operation = 0x16;
400 break;
401 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
402 data->operation.orientation = 0x1;
403 data->operation.operation = 0x03;
404 data->count++;
405 break;
406 case DASD_ECKD_CCW_READ_RECORD_ZERO:
407 data->operation.orientation = 0x3;
408 data->operation.operation = 0x16;
409 data->count++;
410 break;
411 case DASD_ECKD_CCW_WRITE:
412 case DASD_ECKD_CCW_WRITE_MT:
413 case DASD_ECKD_CCW_WRITE_KD:
414 case DASD_ECKD_CCW_WRITE_KD_MT:
415 data->auxiliary.length_valid = 0x1;
416 data->length = reclen;
417 data->operation.operation = 0x01;
418 break;
419 case DASD_ECKD_CCW_WRITE_CKD:
420 case DASD_ECKD_CCW_WRITE_CKD_MT:
421 data->auxiliary.length_valid = 0x1;
422 data->length = reclen;
423 data->operation.operation = 0x03;
424 break;
e4dbb0f2
SH		 425 case DASD_ECKD_CCW_WRITE_FULL_TRACK:
426 data->operation.orientation = 0x0;
427 data->operation.operation = 0x3F;
428 data->extended_operation = 0x11;
429 data->length = 0;
430 data->extended_parameter_length = 0x02;
431 if (data->count > 8) {
432 data->extended_parameter[0] = 0xFF;
433 data->extended_parameter[1] = 0xFF;
434 data->extended_parameter[1] <<= (16 - count);
435 } else {
436 data->extended_parameter[0] = 0xFF;
437 data->extended_parameter[0] <<= (8 - count);
438 data->extended_parameter[1] = 0x00;
439 }
440 data->sector = 0xFF;
441 break;
f3eb5384
SW		 442 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
443 data->auxiliary.length_valid = 0x1;
444 data->length = reclen; /* not tlf, as one might think */
445 data->operation.operation = 0x3F;
446 data->extended_operation = 0x23;
447 break;
448 case DASD_ECKD_CCW_READ:
449 case DASD_ECKD_CCW_READ_MT:
450 case DASD_ECKD_CCW_READ_KD:
451 case DASD_ECKD_CCW_READ_KD_MT:
452 data->auxiliary.length_valid = 0x1;
453 data->length = reclen;
454 data->operation.operation = 0x06;
455 break;
456 case DASD_ECKD_CCW_READ_CKD:
457 case DASD_ECKD_CCW_READ_CKD_MT:
458 data->auxiliary.length_valid = 0x1;
459 data->length = reclen;
460 data->operation.operation = 0x16;
461 break;
462 case DASD_ECKD_CCW_READ_COUNT:
463 data->operation.operation = 0x06;
464 break;
e4dbb0f2
SH		 465 case DASD_ECKD_CCW_READ_TRACK:
466 data->operation.orientation = 0x1;
467 data->operation.operation = 0x0C;
468 data->extended_parameter_length = 0;
469 data->sector = 0xFF;
470 break;
f3eb5384
SW		 471 case DASD_ECKD_CCW_READ_TRACK_DATA:
472 data->auxiliary.length_valid = 0x1;
473 data->length = tlf;
474 data->operation.operation = 0x0C;
475 break;
476 case DASD_ECKD_CCW_ERASE:
477 data->length = reclen;
478 data->auxiliary.length_valid = 0x1;
479 data->operation.operation = 0x0b;
480 break;
481 default:
482 DBF_DEV_EVENT(DBF_ERR, device,
483 "fill LRE unknown opcode 0x%x", cmd);
484 BUG();
485 }
486 set_ch_t(&data->seek_addr,
487 trk / private->rdc_data.trk_per_cyl,
488 trk % private->rdc_data.trk_per_cyl);
489 data->search_arg.cyl = data->seek_addr.cyl;
490 data->search_arg.head = data->seek_addr.head;
491 data->search_arg.record = rec_on_trk;
492}
493
494static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
495 unsigned int trk, unsigned int totrk, int cmd,
496 struct dasd_device *basedev, struct dasd_device *startdev,
45f186be 497 unsigned int format, unsigned int rec_on_trk, int count,
f3eb5384 498 unsigned int blksize, unsigned int tlf)
8e09f215
SW		 499{
500 struct dasd_eckd_private *basepriv, *startpriv;
f3eb5384 501 struct LRE_eckd_data *lredata;
45f186be 502 struct DE_eckd_data *dedata;
8e09f215
SW		 503 int rc = 0;
504
543691a4
SO		 505 basepriv = basedev->private;
506 startpriv = startdev->private;
f3eb5384
SW		 507 dedata = &pfxdata->define_extent;
508 lredata = &pfxdata->locate_record;
8e09f215
SW		 509
510 ccw->cmd_code = DASD_ECKD_CCW_PFX;
511 ccw->flags = 0;
e4dbb0f2
SH		 512 if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) {
513 ccw->count = sizeof(*pfxdata) + 2;
514 ccw->cda = (__u32) __pa(pfxdata);
515 memset(pfxdata, 0, sizeof(*pfxdata) + 2);
516 } else {
517 ccw->count = sizeof(*pfxdata);
518 ccw->cda = (__u32) __pa(pfxdata);
519 memset(pfxdata, 0, sizeof(*pfxdata));
520 }
8e09f215 521
8e09f215 522 /* prefix data */
f3eb5384
SW		 523 if (format > 1) {
524 DBF_DEV_EVENT(DBF_ERR, basedev,
525 "PFX LRE unknown format 0x%x", format);
526 BUG();
527 return -EINVAL;
528 }
529 pfxdata->format = format;
4abb08c2
SW		 530 pfxdata->base_address = basepriv->ned->unit_addr;
531 pfxdata->base_lss = basepriv->ned->ID;
f3eb5384 532 pfxdata->validity.define_extent = 1;
8e09f215
SW		 533
534 /* private uid is kept up to date, conf_data may be outdated */
da340f92 535 if (startpriv->uid.type == UA_BASE_PAV_ALIAS)
8e09f215 536 pfxdata->validity.verify_base = 1;
da340f92
SH		 537
538 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) {
539 pfxdata->validity.verify_base = 1;
540 pfxdata->validity.hyper_pav = 1;
8e09f215
SW		 541 }
542
45f186be 543 rc = define_extent(NULL, dedata, trk, totrk, cmd, basedev, blksize);
8e09f215 544
45f186be
JH		 545 /*
546 * For some commands the System Time Stamp is set in the define extent
547 * data when XRC is supported. The validity of the time stamp must be
548 * reflected in the prefix data as well.
549 */
550 if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02)
551 pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */
f3eb5384
SW		 552
553 if (format == 1) {
45f186be
JH		 554 locate_record_ext(NULL, lredata, trk, rec_on_trk, count, cmd,
555 basedev, blksize, tlf);
f3eb5384
SW		 556 }
557
8e09f215
SW		 558 return rc;
559}
560
f3eb5384
SW		 561static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
562 unsigned int trk, unsigned int totrk, int cmd,
563 struct dasd_device *basedev, struct dasd_device *startdev)
564{
565 return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev,
566 0, 0, 0, 0, 0);
567}
568
4d284cac 569static void
b44b0ab3
SW		 570locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk,
571 unsigned int rec_on_trk, int no_rec, int cmd,
1da177e4
LT		 572 struct dasd_device * device, int reclen)
573{
543691a4 574 struct dasd_eckd_private *private = device->private;
1da177e4
LT		 575 int sector;
576 int dn, d;
138c014d 577
1da177e4
LT		 578 DBF_DEV_EVENT(DBF_INFO, device,
579 "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d",
580 trk, rec_on_trk, no_rec, cmd, reclen);
581
582 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD;
583 ccw->flags = 0;
584 ccw->count = 16;
585 ccw->cda = (__u32) __pa(data);
586
8e09f215 587 memset(data, 0, sizeof(struct LO_eckd_data));
1da177e4
LT		 588 sector = 0;
589 if (rec_on_trk) {
590 switch (private->rdc_data.dev_type) {
591 case 0x3390:
592 dn = ceil_quot(reclen + 6, 232);
593 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
594 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
595 break;
596 case 0x3380:
597 d = 7 + ceil_quot(reclen + 12, 32);
598 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
599 break;
600 }
601 }
602 data->sector = sector;
603 data->count = no_rec;
604 switch (cmd) {
605 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
606 data->operation.orientation = 0x3;
607 data->operation.operation = 0x03;
608 break;
609 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
610 data->operation.orientation = 0x3;
611 data->operation.operation = 0x16;
612 break;
613 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
614 data->operation.orientation = 0x1;
615 data->operation.operation = 0x03;
616 data->count++;
617 break;
618 case DASD_ECKD_CCW_READ_RECORD_ZERO:
619 data->operation.orientation = 0x3;
620 data->operation.operation = 0x16;
621 data->count++;
622 break;
623 case DASD_ECKD_CCW_WRITE:
624 case DASD_ECKD_CCW_WRITE_MT:
625 case DASD_ECKD_CCW_WRITE_KD:
626 case DASD_ECKD_CCW_WRITE_KD_MT:
627 data->auxiliary.last_bytes_used = 0x1;
628 data->length = reclen;
629 data->operation.operation = 0x01;
630 break;
631 case DASD_ECKD_CCW_WRITE_CKD:
632 case DASD_ECKD_CCW_WRITE_CKD_MT:
633 data->auxiliary.last_bytes_used = 0x1;
634 data->length = reclen;
635 data->operation.operation = 0x03;
636 break;
637 case DASD_ECKD_CCW_READ:
638 case DASD_ECKD_CCW_READ_MT:
639 case DASD_ECKD_CCW_READ_KD:
640 case DASD_ECKD_CCW_READ_KD_MT:
641 data->auxiliary.last_bytes_used = 0x1;
642 data->length = reclen;
643 data->operation.operation = 0x06;
644 break;
645 case DASD_ECKD_CCW_READ_CKD:
646 case DASD_ECKD_CCW_READ_CKD_MT:
647 data->auxiliary.last_bytes_used = 0x1;
648 data->length = reclen;
649 data->operation.operation = 0x16;
650 break;
651 case DASD_ECKD_CCW_READ_COUNT:
652 data->operation.operation = 0x06;
653 break;
654 case DASD_ECKD_CCW_ERASE:
655 data->length = reclen;
656 data->auxiliary.last_bytes_used = 0x1;
657 data->operation.operation = 0x0b;
658 break;
659 default:
fc19f381
SH		 660 DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record "
661 "opcode 0x%x", cmd);
1da177e4 662 }
b44b0ab3
SW		 663 set_ch_t(&data->seek_addr,
664 trk / private->rdc_data.trk_per_cyl,
665 trk % private->rdc_data.trk_per_cyl);
666 data->search_arg.cyl = data->seek_addr.cyl;
667 data->search_arg.head = data->seek_addr.head;
1da177e4
LT		 668 data->search_arg.record = rec_on_trk;
669}
670
671/*
672 * Returns 1 if the block is one of the special blocks that needs
673 * to get read/written with the KD variant of the command.
674 * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and
675 * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT.
676 * Luckily the KD variants differ only by one bit (0x08) from the
677 * normal variant. So don't wonder about code like:
678 * if (dasd_eckd_cdl_special(blk_per_trk, recid))
679 * ccw->cmd_code |= 0x8;
680 */
681static inline int
682dasd_eckd_cdl_special(int blk_per_trk, int recid)
683{
684 if (recid < 3)
685 return 1;
686 if (recid < blk_per_trk)
687 return 0;
688 if (recid < 2 * blk_per_trk)
689 return 1;
690 return 0;
691}
692
693/*
694 * Returns the record size for the special blocks of the cdl format.
695 * Only returns something useful if dasd_eckd_cdl_special is true
696 * for the recid.
697 */
698static inline int
699dasd_eckd_cdl_reclen(int recid)
700{
701 if (recid < 3)
702 return sizes_trk0[recid];
703 return LABEL_SIZE;
704}
b206181d
SH		 705/* create unique id from private structure. */
706static void create_uid(struct dasd_eckd_private *private)
3d052595 707{
4abb08c2 708 int count;
b206181d 709 struct dasd_uid *uid;
3d052595 710
2dedf0d9 711 uid = &private->uid;
3d052595 712 memset(uid, 0, sizeof(struct dasd_uid));
4abb08c2 713 memcpy(uid->vendor, private->ned->HDA_manufacturer,
d0710c7c 714 sizeof(uid->vendor) - 1);
3d052595 715 EBCASC(uid->vendor, sizeof(uid->vendor) - 1);
4abb08c2 716 memcpy(uid->serial, private->ned->HDA_location,
d0710c7c 717 sizeof(uid->serial) - 1);
3d052595 718 EBCASC(uid->serial, sizeof(uid->serial) - 1);
4abb08c2 719 uid->ssid = private->gneq->subsystemID;
a419aef8 720 uid->real_unit_addr = private->ned->unit_addr;
4abb08c2
SW		 721 if (private->sneq) {
722 uid->type = private->sneq->sua_flags;
8e09f215 723 if (uid->type == UA_BASE_PAV_ALIAS)
4abb08c2 724 uid->base_unit_addr = private->sneq->base_unit_addr;
8e09f215
SW		 725 } else {
726 uid->type = UA_BASE_DEVICE;
727 }
4abb08c2
SW		 728 if (private->vdsneq) {
729 for (count = 0; count < 16; count++) {
730 sprintf(uid->vduit+2*count, "%02x",
731 private->vdsneq->uit[count]);
732 }
733 }
b206181d
SH		 734}
735
736/*
737 * Generate device unique id that specifies the physical device.
738 */
739static int dasd_eckd_generate_uid(struct dasd_device *device)
740{
543691a4 741 struct dasd_eckd_private *private = device->private;
b206181d
SH		 742 unsigned long flags;
743
b206181d
SH		 744 if (!private)
745 return -ENODEV;
746 if (!private->ned || !private->gneq)
747 return -ENODEV;
748 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
749 create_uid(private);
2dedf0d9 750 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
3d052595
HH		 751 return 0;
752}
753
2dedf0d9
SH		 754static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid)
755{
543691a4 756 struct dasd_eckd_private *private = device->private;
2dedf0d9
SH		 757 unsigned long flags;
758
543691a4 759 if (private) {
2dedf0d9
SH		 760 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
761 *uid = private->uid;
762 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
763 return 0;
764 }
765 return -EINVAL;
766}
767
b206181d
SH		 768/*
769 * compare device UID with data of a given dasd_eckd_private structure
770 * return 0 for match
771 */
772static int dasd_eckd_compare_path_uid(struct dasd_device *device,
773 struct dasd_eckd_private *private)
774{
775 struct dasd_uid device_uid;
776
777 create_uid(private);
778 dasd_eckd_get_uid(device, &device_uid);
779
780 return memcmp(&device_uid, &private->uid, sizeof(struct dasd_uid));
781}
782
a4d26c6a
SW		 783static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device,
784 struct dasd_ccw_req *cqr,
785 __u8 *rcd_buffer,
786 __u8 lpm)
17283b56 787{
17283b56 788 struct ccw1 *ccw;
a4d26c6a
SW		 789 /*
790 * buffer has to start with EBCDIC "V1.0" to show
791 * support for virtual device SNEQ
792 */
793 rcd_buffer[0] = 0xE5;
794 rcd_buffer[1] = 0xF1;
795 rcd_buffer[2] = 0x4B;
796 rcd_buffer[3] = 0xF0;
17283b56
CH		 797
798 ccw = cqr->cpaddr;
a4d26c6a
SW		 799 ccw->cmd_code = DASD_ECKD_CCW_RCD;
800 ccw->flags = 0;
17283b56 801 ccw->cda = (__u32)(addr_t)rcd_buffer;
a4d26c6a
SW		 802 ccw->count = DASD_ECKD_RCD_DATA_SIZE;
803 cqr->magic = DASD_ECKD_MAGIC;
17283b56 804
8e09f215
SW		 805 cqr->startdev = device;
806 cqr->memdev = device;
807 cqr->block = NULL;
17283b56
CH		 808 cqr->expires = 10*HZ;
809 cqr->lpm = lpm;
eb6e199b 810 cqr->retries = 256;
1aae0560 811 cqr->buildclk = get_tod_clock();
17283b56 812 cqr->status = DASD_CQR_FILLED;
a4d26c6a
SW		 813 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags);
814}
815
5915a873
SH		 816/*
817 * Wakeup helper for read_conf
818 * if the cqr is not done and needs some error recovery
819 * the buffer has to be re-initialized with the EBCDIC "V1.0"
820 * to show support for virtual device SNEQ
821 */
822static void read_conf_cb(struct dasd_ccw_req *cqr, void *data)
823{
824 struct ccw1 *ccw;
825 __u8 *rcd_buffer;
826
827 if (cqr->status != DASD_CQR_DONE) {
828 ccw = cqr->cpaddr;
829 rcd_buffer = (__u8 *)((addr_t) ccw->cda);
830 memset(rcd_buffer, 0, sizeof(*rcd_buffer));
831
832 rcd_buffer[0] = 0xE5;
833 rcd_buffer[1] = 0xF1;
834 rcd_buffer[2] = 0x4B;
835 rcd_buffer[3] = 0xF0;
836 }
837 dasd_wakeup_cb(cqr, data);
838}
839
a4d26c6a
SW		 840static int dasd_eckd_read_conf_immediately(struct dasd_device *device,
841 struct dasd_ccw_req *cqr,
842 __u8 *rcd_buffer,
843 __u8 lpm)
844{
845 struct ciw *ciw;
846 int rc;
847 /*
848 * sanity check: scan for RCD command in extended SenseID data
849 * some devices do not support RCD
850 */
851 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD);
852 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD)
853 return -EOPNOTSUPP;
854
855 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm);
856 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
5a27e60d 857 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags);
a4d26c6a 858 cqr->retries = 5;
5915a873 859 cqr->callback = read_conf_cb;
a4d26c6a
SW		 860 rc = dasd_sleep_on_immediatly(cqr);
861 return rc;
17283b56
CH		 862}
863
864static int dasd_eckd_read_conf_lpm(struct dasd_device *device,
865 void **rcd_buffer,
866 int *rcd_buffer_size, __u8 lpm)
867{
868 struct ciw *ciw;
869 char *rcd_buf = NULL;
870 int ret;
871 struct dasd_ccw_req *cqr;
872
873 /*
a4d26c6a
SW		 874 * sanity check: scan for RCD command in extended SenseID data
875 * some devices do not support RCD
17283b56
CH		 876 */
877 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD);
a4d26c6a 878 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) {
17283b56
CH		 879 ret = -EOPNOTSUPP;
880 goto out_error;
881 }
a4d26c6a 882 rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA);
17283b56
CH		 883 if (!rcd_buf) {
884 ret = -ENOMEM;
885 goto out_error;
886 }
a4d26c6a
SW		 887 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */,
888 0, /* use rcd_buf as data ara */
c5205f2f 889 device, NULL);
17283b56 890 if (IS_ERR(cqr)) {
a4d26c6a
SW		 891 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
892 "Could not allocate RCD request");
893 ret = -ENOMEM;
17283b56
CH		 894 goto out_error;
895 }
a4d26c6a 896 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm);
5915a873 897 cqr->callback = read_conf_cb;
17283b56
CH		 898 ret = dasd_sleep_on(cqr);
899 /*
900 * on success we update the user input parms
901 */
8e09f215 902 dasd_sfree_request(cqr, cqr->memdev);
17283b56
CH		 903 if (ret)
904 goto out_error;
905
a4d26c6a 906 *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE;
17283b56
CH		 907 *rcd_buffer = rcd_buf;
908 return 0;
909out_error:
910 kfree(rcd_buf);
911 *rcd_buffer = NULL;
912 *rcd_buffer_size = 0;
913 return ret;
914}
915
4abb08c2
SW		 916static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private)
917{
918
919 struct dasd_sneq *sneq;
920 int i, count;
921
922 private->ned = NULL;
923 private->sneq = NULL;
924 private->vdsneq = NULL;
925 private->gneq = NULL;
926 count = private->conf_len / sizeof(struct dasd_sneq);
927 sneq = (struct dasd_sneq *)private->conf_data;
928 for (i = 0; i < count; ++i) {
929 if (sneq->flags.identifier == 1 && sneq->format == 1)
930 private->sneq = sneq;
931 else if (sneq->flags.identifier == 1 && sneq->format == 4)
932 private->vdsneq = (struct vd_sneq *)sneq;
933 else if (sneq->flags.identifier == 2)
934 private->gneq = (struct dasd_gneq *)sneq;
935 else if (sneq->flags.identifier == 3 && sneq->res1 == 1)
936 private->ned = (struct dasd_ned *)sneq;
937 sneq++;
938 }
939 if (!private->ned || !private->gneq) {
940 private->ned = NULL;
941 private->sneq = NULL;
942 private->vdsneq = NULL;
943 private->gneq = NULL;
944 return -EINVAL;
945 }
946 return 0;
947
948};
949
950static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len)
951{
952 struct dasd_gneq *gneq;
953 int i, count, found;
954
955 count = conf_len / sizeof(*gneq);
956 gneq = (struct dasd_gneq *)conf_data;
957 found = 0;
958 for (i = 0; i < count; ++i) {
959 if (gneq->flags.identifier == 2) {
960 found = 1;
961 break;
962 }
963 gneq++;
964 }
965 if (found)
966 return ((char *)gneq)[18] & 0x07;
967 else
968 return 0;
969}
970
c7c0c9de
SH		 971static void dasd_eckd_clear_conf_data(struct dasd_device *device)
972{
543691a4 973 struct dasd_eckd_private *private = device->private;
c7c0c9de
SH		 974 int i;
975
c7c0c9de
SH		 976 private->conf_data = NULL;
977 private->conf_len = 0;
978 for (i = 0; i < 8; i++) {
c9346151
SH		 979 kfree(device->path[i].conf_data);
980 device->path[i].conf_data = NULL;
a521b048
SH		 981 device->path[i].cssid = 0;
982 device->path[i].ssid = 0;
983 device->path[i].chpid = 0;
c7c0c9de
SH		 984 }
985}
986
987
4abb08c2 988static int dasd_eckd_read_conf(struct dasd_device *device)
1da177e4
LT		 989{
990 void *conf_data;
991 int conf_len, conf_data_saved;
b179b037 992 int rc, path_err, pos;
a4d26c6a 993 __u8 lpm, opm;
b206181d 994 struct dasd_eckd_private *private, path_private;
b206181d
SH		 995 struct dasd_uid *uid;
996 char print_path_uid[60], print_device_uid[60];
ded27d8d 997 struct channel_path_desc_fmt0 *chp_desc;
a521b048 998 struct subchannel_id sch_id;
1da177e4 999
543691a4 1000 private = device->private;
a4d26c6a 1001 opm = ccw_device_get_path_mask(device->cdev);
a521b048 1002 ccw_device_get_schid(device->cdev, &sch_id);
1da177e4 1003 conf_data_saved = 0;
55d3a85c 1004 path_err = 0;
1da177e4
LT		 1005 /* get configuration data per operational path */
1006 for (lpm = 0x80; lpm; lpm>>= 1) {
b206181d
SH		 1007 if (!(lpm & opm))
1008 continue;
1009 rc = dasd_eckd_read_conf_lpm(device, &conf_data,
1010 &conf_len, lpm);
1011 if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */
1012 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1013 "Read configuration data returned "
1014 "error %d", rc);
1015 return rc;
1016 }
1017 if (conf_data == NULL) {
1018 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1019 "No configuration data "
1020 "retrieved");
1021 /* no further analysis possible */
c9346151 1022 dasd_path_add_opm(device, opm);
b206181d
SH		 1023 continue; /* no error */
1024 }
1025 /* save first valid configuration data */
1026 if (!conf_data_saved) {
c7c0c9de
SH		 1027 /* initially clear previously stored conf_data */
1028 dasd_eckd_clear_conf_data(device);
b206181d
SH		 1029 private->conf_data = conf_data;
1030 private->conf_len = conf_len;
1031 if (dasd_eckd_identify_conf_parts(private)) {
1032 private->conf_data = NULL;
1033 private->conf_len = 0;
1034 kfree(conf_data);
1035 continue;
1da177e4 1036 }
c7c0c9de
SH		 1037 pos = pathmask_to_pos(lpm);
1038 /* store per path conf_data */
c9346151 1039 device->path[pos].conf_data = conf_data;
a521b048
SH		 1040 device->path[pos].cssid = sch_id.cssid;
1041 device->path[pos].ssid = sch_id.ssid;
1042 chp_desc = ccw_device_get_chp_desc(device->cdev, pos);
1043 if (chp_desc)
1044 device->path[pos].chpid = chp_desc->chpid;
1045 kfree(chp_desc);
b206181d
SH		 1046 /*
1047 * build device UID that other path data
1048 * can be compared to it
1049 */
1050 dasd_eckd_generate_uid(device);
1051 conf_data_saved++;
1052 } else {
1053 path_private.conf_data = conf_data;
1054 path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE;
1055 if (dasd_eckd_identify_conf_parts(
1056 &path_private)) {
1057 path_private.conf_data = NULL;
1058 path_private.conf_len = 0;
1059 kfree(conf_data);
1060 continue;
1da177e4 1061 }
b206181d
SH		 1062 if (dasd_eckd_compare_path_uid(
1063 device, &path_private)) {
1064 uid = &path_private.uid;
1065 if (strlen(uid->vduit) > 0)
1066 snprintf(print_path_uid,
1067 sizeof(print_path_uid),
1068 "%s.%s.%04x.%02x.%s",
1069 uid->vendor, uid->serial,
1070 uid->ssid, uid->real_unit_addr,
1071 uid->vduit);
1072 else
1073 snprintf(print_path_uid,
1074 sizeof(print_path_uid),
1075 "%s.%s.%04x.%02x",
1076 uid->vendor, uid->serial,
1077 uid->ssid,
1078 uid->real_unit_addr);
1079 uid = &private->uid;
1080 if (strlen(uid->vduit) > 0)
1081 snprintf(print_device_uid,
1082 sizeof(print_device_uid),
1083 "%s.%s.%04x.%02x.%s",
1084 uid->vendor, uid->serial,
1085 uid->ssid, uid->real_unit_addr,
1086 uid->vduit);
1087 else
1088 snprintf(print_device_uid,
1089 sizeof(print_device_uid),
1090 "%s.%s.%04x.%02x",
1091 uid->vendor, uid->serial,
1092 uid->ssid,
1093 uid->real_unit_addr);
1094 dev_err(&device->cdev->dev,
1095 "Not all channel paths lead to "
1096 "the same device, path %02X leads to "
1097 "device %s instead of %s\n", lpm,
1098 print_path_uid, print_device_uid);
55d3a85c 1099 path_err = -EINVAL;
c9346151 1100 dasd_path_add_cablepm(device, lpm);
55d3a85c 1101 continue;
1da177e4 1102 }
c7c0c9de
SH		 1103 pos = pathmask_to_pos(lpm);
1104 /* store per path conf_data */
c9346151 1105 device->path[pos].conf_data = conf_data;
a521b048
SH		 1106 device->path[pos].cssid = sch_id.cssid;
1107 device->path[pos].ssid = sch_id.ssid;
1108 chp_desc = ccw_device_get_chp_desc(device->cdev, pos);
1109 if (chp_desc)
1110 device->path[pos].chpid = chp_desc->chpid;
1111 kfree(chp_desc);
b206181d
SH		 1112 path_private.conf_data = NULL;
1113 path_private.conf_len = 0;
1114 }
1115 switch (dasd_eckd_path_access(conf_data, conf_len)) {
1116 case 0x02:
c9346151 1117 dasd_path_add_nppm(device, lpm);
b206181d
SH		 1118 break;
1119 case 0x03:
c9346151 1120 dasd_path_add_ppm(device, lpm);
b206181d 1121 break;
1da177e4 1122 }
c9346151
SH		 1123 if (!dasd_path_get_opm(device)) {
1124 dasd_path_set_opm(device, lpm);
ccc0e7dc
SH		 1125 dasd_generic_path_operational(device);
1126 } else {
c9346151 1127 dasd_path_add_opm(device, lpm);
ccc0e7dc 1128 }
1da177e4 1129 }
b206181d 1130
55d3a85c 1131 return path_err;
1da177e4
LT		 1132}
1133
a521b048
SH		 1134static u32 get_fcx_max_data(struct dasd_device *device)
1135{
1136 struct dasd_eckd_private *private = device->private;
1137 int fcx_in_css, fcx_in_gneq, fcx_in_features;
1138 int tpm, mdc;
1139
1140 if (dasd_nofcx)
1141 return 0;
1142 /* is transport mode supported? */
1143 fcx_in_css = css_general_characteristics.fcx;
1144 fcx_in_gneq = private->gneq->reserved2[7] & 0x04;
1145 fcx_in_features = private->features.feature[40] & 0x80;
1146 tpm = fcx_in_css && fcx_in_gneq && fcx_in_features;
1147
1148 if (!tpm)
1149 return 0;
1150
1151 mdc = ccw_device_get_mdc(device->cdev, 0);
1152 if (mdc < 0) {
1153 dev_warn(&device->cdev->dev, "Detecting the maximum supported data size for zHPF requests failed\n");
1154 return 0;
1155 } else {
1156 return (u32)mdc * FCX_MAX_DATA_FACTOR;
1157 }
1158}
1159
a4d26c6a
SW		 1160static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm)
1161{
543691a4 1162 struct dasd_eckd_private *private = device->private;
a4d26c6a
SW		 1163 int mdc;
1164 u32 fcx_max_data;
1165
a4d26c6a
SW		 1166 if (private->fcx_max_data) {
1167 mdc = ccw_device_get_mdc(device->cdev, lpm);
1168 if ((mdc < 0)) {
1169 dev_warn(&device->cdev->dev,
1170 "Detecting the maximum data size for zHPF "
1171 "requests failed (rc=%d) for a new path %x\n",
1172 mdc, lpm);
1173 return mdc;
1174 }
0f02c4e7 1175 fcx_max_data = (u32)mdc * FCX_MAX_DATA_FACTOR;
a4d26c6a
SW		 1176 if (fcx_max_data < private->fcx_max_data) {
1177 dev_warn(&device->cdev->dev,
1178 "The maximum data size for zHPF requests %u "
1179 "on a new path %x is below the active maximum "
1180 "%u\n", fcx_max_data, lpm,
1181 private->fcx_max_data);
1182 return -EACCES;
1183 }
1184 }
1185 return 0;
1186}
1187
b206181d
SH		 1188static int rebuild_device_uid(struct dasd_device *device,
1189 struct path_verification_work_data *data)
1190{
543691a4 1191 struct dasd_eckd_private *private = device->private;
c9346151 1192 __u8 lpm, opm = dasd_path_get_opm(device);
543691a4 1193 int rc = -ENODEV;
b206181d
SH		 1194
1195 for (lpm = 0x80; lpm; lpm >>= 1) {
1196 if (!(lpm & opm))
1197 continue;
1198 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer));
1199 memset(&data->cqr, 0, sizeof(data->cqr));
1200 data->cqr.cpaddr = &data->ccw;
1201 rc = dasd_eckd_read_conf_immediately(device, &data->cqr,
1202 data->rcd_buffer,
1203 lpm);
1204
1205 if (rc) {
1206 if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */
1207 continue;
1208 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1209 "Read configuration data "
1210 "returned error %d", rc);
1211 break;
1212 }
1213 memcpy(private->conf_data, data->rcd_buffer,
1214 DASD_ECKD_RCD_DATA_SIZE);
1215 if (dasd_eckd_identify_conf_parts(private)) {
1216 rc = -ENODEV;
1217 } else /* first valid path is enough */
1218 break;
1219 }
1220
1221 if (!rc)
1222 rc = dasd_eckd_generate_uid(device);
1223
1224 return rc;
1225}
1226
a4d26c6a
SW		 1227static void do_path_verification_work(struct work_struct *work)
1228{
1229 struct path_verification_work_data *data;
1230 struct dasd_device *device;
b206181d
SH		 1231 struct dasd_eckd_private path_private;
1232 struct dasd_uid *uid;
1233 __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE];
5db8440c 1234 __u8 lpm, opm, npm, ppm, epm, hpfpm, cablepm;
a4d26c6a 1235 unsigned long flags;
b206181d 1236 char print_uid[60];
a4d26c6a
SW		 1237 int rc;
1238
1239 data = container_of(work, struct path_verification_work_data, worker);
1240 device = data->device;
1241
c8d1c0ff
SH		 1242 /* delay path verification until device was resumed */
1243 if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) {
1244 schedule_work(work);
1245 return;
1246 }
1eb38023
SH		 1247 /* check if path verification already running and delay if so */
1248 if (test_and_set_bit(DASD_FLAG_PATH_VERIFY, &device->flags)) {
1249 schedule_work(work);
1250 return;
1251 }
a4d26c6a
SW		 1252 opm = 0;
1253 npm = 0;
1254 ppm = 0;
1255 epm = 0;
5db8440c
SH		 1256 hpfpm = 0;
1257 cablepm = 0;
1258
a4d26c6a 1259 for (lpm = 0x80; lpm; lpm >>= 1) {
b206181d
SH		 1260 if (!(lpm & data->tbvpm))
1261 continue;
1262 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer));
1263 memset(&data->cqr, 0, sizeof(data->cqr));
1264 data->cqr.cpaddr = &data->ccw;
1265 rc = dasd_eckd_read_conf_immediately(device, &data->cqr,
1266 data->rcd_buffer,
1267 lpm);
1268 if (!rc) {
1269 switch (dasd_eckd_path_access(data->rcd_buffer,
1270 DASD_ECKD_RCD_DATA_SIZE)
1271 ) {
1272 case 0x02:
1273 npm |= lpm;
1274 break;
1275 case 0x03:
1276 ppm |= lpm;
1277 break;
1278 }
1279 opm |= lpm;
1280 } else if (rc == -EOPNOTSUPP) {
1281 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1282 "path verification: No configuration "
1283 "data retrieved");
1284 opm |= lpm;
1285 } else if (rc == -EAGAIN) {
1286 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
a4d26c6a
SW		 1287 "path verification: device is stopped,"
1288 " try again later");
b206181d
SH		 1289 epm |= lpm;
1290 } else {
1291 dev_warn(&device->cdev->dev,
1292 "Reading device feature codes failed "
1293 "(rc=%d) for new path %x\n", rc, lpm);
1294 continue;
1295 }
1296 if (verify_fcx_max_data(device, lpm)) {
1297 opm &= ~lpm;
1298 npm &= ~lpm;
1299 ppm &= ~lpm;
5db8440c 1300 hpfpm |= lpm;
b206181d
SH		 1301 continue;
1302 }
1303
1304 /*
1305 * save conf_data for comparison after
1306 * rebuild_device_uid may have changed
1307 * the original data
1308 */
1309 memcpy(&path_rcd_buf, data->rcd_buffer,
1310 DASD_ECKD_RCD_DATA_SIZE);
1311 path_private.conf_data = (void *) &path_rcd_buf;
1312 path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE;
1313 if (dasd_eckd_identify_conf_parts(&path_private)) {
1314 path_private.conf_data = NULL;
1315 path_private.conf_len = 0;
1316 continue;
1317 }
1318
1319 /*
1320 * compare path UID with device UID only if at least
1321 * one valid path is left
1322 * in other case the device UID may have changed and
1323 * the first working path UID will be used as device UID
1324 */
c9346151 1325 if (dasd_path_get_opm(device) &&
b206181d
SH		 1326 dasd_eckd_compare_path_uid(device, &path_private)) {
1327 /*
1328 * the comparison was not successful
1329 * rebuild the device UID with at least one
1330 * known path in case a z/VM hyperswap command
1331 * has changed the device
1332 *
1333 * after this compare again
1334 *
1335 * if either the rebuild or the recompare fails
1336 * the path can not be used
1337 */
1338 if (rebuild_device_uid(device, data) ||
1339 dasd_eckd_compare_path_uid(
1340 device, &path_private)) {
1341 uid = &path_private.uid;
1342 if (strlen(uid->vduit) > 0)
1343 snprintf(print_uid, sizeof(print_uid),
1344 "%s.%s.%04x.%02x.%s",
1345 uid->vendor, uid->serial,
1346 uid->ssid, uid->real_unit_addr,
1347 uid->vduit);
1348 else
1349 snprintf(print_uid, sizeof(print_uid),
1350 "%s.%s.%04x.%02x",
1351 uid->vendor, uid->serial,
1352 uid->ssid,
1353 uid->real_unit_addr);
1354 dev_err(&device->cdev->dev,
1355 "The newly added channel path %02X "
1356 "will not be used because it leads "
1357 "to a different device %s\n",
1358 lpm, print_uid);
a4d26c6a
SW		 1359 opm &= ~lpm;
1360 npm &= ~lpm;
1361 ppm &= ~lpm;
5db8440c 1362 cablepm |= lpm;
b206181d 1363 continue;
a4d26c6a
SW		 1364 }
1365 }
b206181d
SH		 1366
1367 /*
1368 * There is a small chance that a path is lost again between
1369 * above path verification and the following modification of
1370 * the device opm mask. We could avoid that race here by using
1371 * yet another path mask, but we rather deal with this unlikely
1372 * situation in dasd_start_IO.
1373 */
1374 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
c9346151
SH		 1375 if (!dasd_path_get_opm(device) && opm) {
1376 dasd_path_set_opm(device, opm);
b206181d 1377 dasd_generic_path_operational(device);
5db8440c 1378 } else {
c9346151 1379 dasd_path_add_opm(device, opm);
5db8440c 1380 }
c9346151
SH		 1381 dasd_path_add_nppm(device, npm);
1382 dasd_path_add_ppm(device, ppm);
1383 dasd_path_add_tbvpm(device, epm);
1384 dasd_path_add_cablepm(device, cablepm);
1385 dasd_path_add_nohpfpm(device, hpfpm);
b206181d 1386 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
a4d26c6a 1387 }
1eb38023 1388 clear_bit(DASD_FLAG_PATH_VERIFY, &device->flags);
a4d26c6a
SW		 1389 dasd_put_device(device);
1390 if (data->isglobal)
1391 mutex_unlock(&dasd_path_verification_mutex);
1392 else
1393 kfree(data);
1394}
1395
1396static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm)
1397{
1398 struct path_verification_work_data *data;
1399
1400 data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA);
1401 if (!data) {
1402 if (mutex_trylock(&dasd_path_verification_mutex)) {
1403 data = path_verification_worker;
1404 data->isglobal = 1;
1405 } else
1406 return -ENOMEM;
1407 } else {
1408 memset(data, 0, sizeof(*data));
1409 data->isglobal = 0;
1410 }
1411 INIT_WORK(&data->worker, do_path_verification_work);
1412 dasd_get_device(device);
1413 data->device = device;
1414 data->tbvpm = lpm;
1415 schedule_work(&data->worker);
1416 return 0;
1417}
1418
a521b048
SH		 1419static void dasd_eckd_reset_path(struct dasd_device *device, __u8 pm)
1420{
1421 struct dasd_eckd_private *private = device->private;
1422 unsigned long flags;
1423
1424 if (!private->fcx_max_data)
1425 private->fcx_max_data = get_fcx_max_data(device);
1426 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
1427 dasd_path_set_tbvpm(device, pm ? : dasd_path_get_notoperpm(device));
1428 dasd_schedule_device_bh(device);
1429 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
1430}
1431
8e09f215
SW		 1432static int dasd_eckd_read_features(struct dasd_device *device)
1433{
543691a4 1434 struct dasd_eckd_private *private = device->private;
8e09f215
SW		 1435 struct dasd_psf_prssd_data *prssdp;
1436 struct dasd_rssd_features *features;
1437 struct dasd_ccw_req *cqr;
1438 struct ccw1 *ccw;
1439 int rc;
8e09f215 1440
68d1e5f0 1441 memset(&private->features, 0, sizeof(struct dasd_rssd_features));
68b781fe 1442 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
8e09f215
SW		 1443 (sizeof(struct dasd_psf_prssd_data) +
1444 sizeof(struct dasd_rssd_features)),
c5205f2f 1445 device, NULL);
8e09f215 1446 if (IS_ERR(cqr)) {
b8ed5dd5
SH		 1447 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not "
1448 "allocate initialization request");
8e09f215
SW		 1449 return PTR_ERR(cqr);
1450 }
1451 cqr->startdev = device;
1452 cqr->memdev = device;
1453 cqr->block = NULL;
eb6e199b 1454 cqr->retries = 256;
8e09f215
SW		 1455 cqr->expires = 10 * HZ;
1456
1457 /* Prepare for Read Subsystem Data */
1458 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
1459 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
1460 prssdp->order = PSF_ORDER_PRSSD;
1461 prssdp->suborder = 0x41; /* Read Feature Codes */
1462 /* all other bytes of prssdp must be zero */
1463
1464 ccw = cqr->cpaddr;
1465 ccw->cmd_code = DASD_ECKD_CCW_PSF;
1466 ccw->count = sizeof(struct dasd_psf_prssd_data);
1467 ccw->flags |= CCW_FLAG_CC;
1468 ccw->cda = (__u32)(addr_t) prssdp;
1469
1470 /* Read Subsystem Data - feature codes */
1471 features = (struct dasd_rssd_features *) (prssdp + 1);
1472 memset(features, 0, sizeof(struct dasd_rssd_features));
1473
1474 ccw++;
1475 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
1476 ccw->count = sizeof(struct dasd_rssd_features);
1477 ccw->cda = (__u32)(addr_t) features;
1478
1aae0560 1479 cqr->buildclk = get_tod_clock();
8e09f215
SW		 1480 cqr->status = DASD_CQR_FILLED;
1481 rc = dasd_sleep_on(cqr);
1482 if (rc == 0) {
1483 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
1484 features = (struct dasd_rssd_features *) (prssdp + 1);
1485 memcpy(&private->features, features,
1486 sizeof(struct dasd_rssd_features));
68d1e5f0
SW		 1487 } else
1488 dev_warn(&device->cdev->dev, "Reading device feature codes"
1489 " failed with rc=%d\n", rc);
8e09f215
SW		 1490 dasd_sfree_request(cqr, cqr->memdev);
1491 return rc;
1492}
1493
1494
40545573
HH		 1495/*
1496 * Build CP for Perform Subsystem Function - SSC.
1497 */
f3eb5384
SW		 1498static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device,
1499 int enable_pav)
40545573 1500{
8e09f215
SW		 1501 struct dasd_ccw_req *cqr;
1502 struct dasd_psf_ssc_data *psf_ssc_data;
1503 struct ccw1 *ccw;
40545573 1504
68b781fe 1505 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ ,
40545573 1506 sizeof(struct dasd_psf_ssc_data),
c5205f2f 1507 device, NULL);
40545573 1508
8e09f215 1509 if (IS_ERR(cqr)) {
fc19f381 1510 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
40545573 1511 "Could not allocate PSF-SSC request");
8e09f215
SW		 1512 return cqr;
1513 }
1514 psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data;
1515 psf_ssc_data->order = PSF_ORDER_SSC;
626350b6 1516 psf_ssc_data->suborder = 0xc0;
f3eb5384 1517 if (enable_pav) {
626350b6 1518 psf_ssc_data->suborder |= 0x08;
f3eb5384
SW		 1519 psf_ssc_data->reserved[0] = 0x88;
1520 }
8e09f215
SW		 1521 ccw = cqr->cpaddr;
1522 ccw->cmd_code = DASD_ECKD_CCW_PSF;
1523 ccw->cda = (__u32)(addr_t)psf_ssc_data;
1524 ccw->count = 66;
1525
1526 cqr->startdev = device;
1527 cqr->memdev = device;
1528 cqr->block = NULL;
eb6e199b 1529 cqr->retries = 256;
8e09f215 1530 cqr->expires = 10*HZ;
1aae0560 1531 cqr->buildclk = get_tod_clock();
8e09f215
SW		 1532 cqr->status = DASD_CQR_FILLED;
1533 return cqr;
40545573
HH		 1534}
1535
1536/*
1537 * Perform Subsystem Function.
1538 * It is necessary to trigger CIO for channel revalidation since this
1539 * call might change behaviour of DASD devices.
1540 */
1541static int
12d7b107
SH		 1542dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav,
1543 unsigned long flags)
40545573 1544{
8e09f215
SW		 1545 struct dasd_ccw_req *cqr;
1546 int rc;
1547
f3eb5384 1548 cqr = dasd_eckd_build_psf_ssc(device, enable_pav);
8e09f215
SW		 1549 if (IS_ERR(cqr))
1550 return PTR_ERR(cqr);
1551
12d7b107
SH		 1552 /*
1553 * set flags e.g. turn on failfast, to prevent blocking
1554 * the calling function should handle failed requests
1555 */
1556 cqr->flags |= flags;
1557
8e09f215
SW		 1558 rc = dasd_sleep_on(cqr);
1559 if (!rc)
1560 /* trigger CIO to reprobe devices */
1561 css_schedule_reprobe();
12d7b107
SH		 1562 else if (cqr->intrc == -EAGAIN)
1563 rc = -EAGAIN;
1564
8e09f215
SW		 1565 dasd_sfree_request(cqr, cqr->memdev);
1566 return rc;
40545573
HH		 1567}
1568
1569/*
1570 * Valide storage server of current device.
1571 */
12d7b107
SH		 1572static int dasd_eckd_validate_server(struct dasd_device *device,
1573 unsigned long flags)
40545573 1574{
543691a4
SO		 1575 struct dasd_eckd_private *private = device->private;
1576 int enable_pav, rc;
40545573 1577
f9f8d02f
SH		 1578 if (private->uid.type == UA_BASE_PAV_ALIAS ||
1579 private->uid.type == UA_HYPER_PAV_ALIAS)
12d7b107 1580 return 0;
40545573 1581 if (dasd_nopav || MACHINE_IS_VM)
f3eb5384
SW		 1582 enable_pav = 0;
1583 else
1584 enable_pav = 1;
12d7b107 1585 rc = dasd_eckd_psf_ssc(device, enable_pav, flags);
eb6e199b 1586
8e79a441
HH		 1587 /* may be requested feature is not available on server,
1588 * therefore just report error and go ahead */
b8ed5dd5
SH		 1589 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x "
1590 "returned rc=%d", private->uid.ssid, rc);
12d7b107 1591 return rc;
40545573
HH		 1592}
1593
f1633031
SH		 1594/*
1595 * worker to do a validate server in case of a lost pathgroup
1596 */
1597static void dasd_eckd_do_validate_server(struct work_struct *work)
1598{
1599 struct dasd_device *device = container_of(work, struct dasd_device,
1600 kick_validate);
ea4da6ea
SH		 1601 unsigned long flags = 0;
1602
1603 set_bit(DASD_CQR_FLAGS_FAILFAST, &flags);
1604 if (dasd_eckd_validate_server(device, flags)
12d7b107
SH		 1605 == -EAGAIN) {
1606 /* schedule worker again if failed */
1607 schedule_work(&device->kick_validate);
1608 return;
1609 }
1610
f1633031
SH		 1611 dasd_put_device(device);
1612}
1613
1614static void dasd_eckd_kick_validate_server(struct dasd_device *device)
1615{
1616 dasd_get_device(device);
25e2cf1c
SH		 1617 /* exit if device not online or in offline processing */
1618 if (test_bit(DASD_FLAG_OFFLINE, &device->flags) ||
1619 device->state < DASD_STATE_ONLINE) {
1620 dasd_put_device(device);
1621 return;
1622 }
f1633031 1623 /* queue call to do_validate_server to the kernel event daemon. */
f2608cd4
SH		 1624 if (!schedule_work(&device->kick_validate))
1625 dasd_put_device(device);
f1633031
SH		 1626}
1627
3d052595
HH		 1628/*
1629 * Check device characteristics.
1630 * If the device is accessible using ECKD discipline, the device is enabled.
1631 */
1da177e4
LT		 1632static int
1633dasd_eckd_check_characteristics(struct dasd_device *device)
1634{
543691a4 1635 struct dasd_eckd_private *private = device->private;
8e09f215 1636 struct dasd_block *block;
2dedf0d9 1637 struct dasd_uid temp_uid;
f9f8d02f 1638 int rc, i;
33b62a30 1639 int readonly;
7c8faa86 1640 unsigned long value;
1da177e4 1641
f1633031
SH		 1642 /* setup work queue for validate server*/
1643 INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server);
59a9ed5f
SH		 1644 /* setup work queue for summary unit check */
1645 INIT_WORK(&device->suc_work, dasd_alias_handle_summary_unit_check);
f1633031 1646
454e1fa1
PO		 1647 if (!ccw_device_is_pathgroup(device->cdev)) {
1648 dev_warn(&device->cdev->dev,
1649 "A channel path group could not be established\n");
1650 return -EIO;
1651 }
1652 if (!ccw_device_is_multipath(device->cdev)) {
1653 dev_info(&device->cdev->dev,
1654 "The DASD is not operating in multipath mode\n");
1655 }
92636b15
SO		 1656 if (!private) {
1657 private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA);
1658 if (!private) {
fc19f381
SH		 1659 dev_warn(&device->cdev->dev,
1660 "Allocating memory for private DASD data "
1661 "failed\n");
1da177e4
LT		 1662 return -ENOMEM;
1663 }
543691a4 1664 device->private = private;
92636b15
SO		 1665 } else {
1666 memset(private, 0, sizeof(*private));
1da177e4
LT		 1667 }
1668 /* Invalidate status of initial analysis. */
1669 private->init_cqr_status = -1;
1670 /* Set default cache operations. */
1671 private->attrib.operation = DASD_NORMAL_CACHE;
1672 private->attrib.nr_cyl = 0;
1673
40545573
HH		 1674 /* Read Configuration Data */
1675 rc = dasd_eckd_read_conf(device);
1676 if (rc)
8e09f215 1677 goto out_err1;
40545573 1678
a521b048 1679 /* set some default values */
7c8faa86 1680 device->default_expires = DASD_EXPIRES;
1f1ee9ad 1681 device->default_retries = DASD_RETRIES;
a521b048
SH		 1682 device->path_thrhld = DASD_ECKD_PATH_THRHLD;
1683 device->path_interval = DASD_ECKD_PATH_INTERVAL;
1f1ee9ad 1684
7c8faa86
SH		 1685 if (private->gneq) {
1686 value = 1;
1687 for (i = 0; i < private->gneq->timeout.value; i++)
1688 value = 10 * value;
1689 value = value * private->gneq->timeout.number;
1690 /* do not accept useless values */
1691 if (value != 0 && value <= DASD_EXPIRES_MAX)
1692 device->default_expires = value;
1693 }
1694
2dedf0d9
SH		 1695 dasd_eckd_get_uid(device, &temp_uid);
1696 if (temp_uid.type == UA_BASE_DEVICE) {
8e09f215
SW		 1697 block = dasd_alloc_block();
1698 if (IS_ERR(block)) {
b8ed5dd5
SH		 1699 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1700 "could not allocate dasd "
1701 "block structure");
8e09f215
SW		 1702 rc = PTR_ERR(block);
1703 goto out_err1;
1704 }
1705 device->block = block;
1706 block->base = device;
1707 }
1708
f9f8d02f
SH		 1709 /* register lcu with alias handling, enable PAV */
1710 rc = dasd_alias_make_device_known_to_lcu(device);
1711 if (rc)
8e09f215 1712 goto out_err2;
f9f8d02f 1713
12d7b107 1714 dasd_eckd_validate_server(device, 0);
f4ac1d02
SW		 1715
1716 /* device may report different configuration data after LCU setup */
1717 rc = dasd_eckd_read_conf(device);
1718 if (rc)
1719 goto out_err3;
8e09f215
SW		 1720
1721 /* Read Feature Codes */
68d1e5f0 1722 dasd_eckd_read_features(device);
40545573 1723
1da177e4 1724 /* Read Device Characteristics */
68b781fe
SH		 1725 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
1726 &private->rdc_data, 64);
8e09f215 1727 if (rc) {
b8ed5dd5
SH		 1728 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1729 "Read device characteristic failed, rc=%d", rc);
8e09f215
SW		 1730 goto out_err3;
1731 }
34cd551a
SH		 1732
1733 if ((device->features & DASD_FEATURE_USERAW) &&
1734 !(private->rdc_data.facilities.RT_in_LR)) {
1735 dev_err(&device->cdev->dev, "The storage server does not "
1736 "support raw-track access\n");
1737 rc = -EINVAL;
1738 goto out_err3;
1739 }
1740
817f2c84 1741 /* find the valid cylinder size */
b44b0ab3
SW		 1742 if (private->rdc_data.no_cyl == LV_COMPAT_CYL &&
1743 private->rdc_data.long_no_cyl)
1744 private->real_cyl = private->rdc_data.long_no_cyl;
1745 else
1746 private->real_cyl = private->rdc_data.no_cyl;
1747
ef19298b
SW		 1748 private->fcx_max_data = get_fcx_max_data(device);
1749
33b62a30
SW		 1750 readonly = dasd_device_is_ro(device);
1751 if (readonly)
1752 set_bit(DASD_FLAG_DEVICE_RO, &device->flags);
1753
fc19f381 1754 dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) "
33b62a30 1755 "with %d cylinders, %d heads, %d sectors%s\n",
fc19f381
SH		 1756 private->rdc_data.dev_type,
1757 private->rdc_data.dev_model,
1758 private->rdc_data.cu_type,
1759 private->rdc_data.cu_model.model,
92636b15 1760 private->real_cyl,
fc19f381 1761 private->rdc_data.trk_per_cyl,
33b62a30
SW		 1762 private->rdc_data.sec_per_trk,
1763 readonly ? ", read-only device" : "");
8e09f215
SW		 1764 return 0;
1765
1766out_err3:
1767 dasd_alias_disconnect_device_from_lcu(device);
1768out_err2:
1769 dasd_free_block(device->block);
1770 device->block = NULL;
1771out_err1:
4abb08c2 1772 kfree(private->conf_data);
8e09f215
SW		 1773 kfree(device->private);
1774 device->private = NULL;
3d052595 1775 return rc;
1da177e4
LT		 1776}
1777
8e09f215
SW		 1778static void dasd_eckd_uncheck_device(struct dasd_device *device)
1779{
543691a4 1780 struct dasd_eckd_private *private = device->private;
b179b037 1781 int i;
4abb08c2 1782
7c6553d4
SH		 1783 if (!private)
1784 return;
1785
8e09f215 1786 dasd_alias_disconnect_device_from_lcu(device);
4abb08c2
SW		 1787 private->ned = NULL;
1788 private->sneq = NULL;
1789 private->vdsneq = NULL;
1790 private->gneq = NULL;
1791 private->conf_len = 0;
b179b037 1792 for (i = 0; i < 8; i++) {
c9346151
SH		 1793 kfree(device->path[i].conf_data);
1794 if ((__u8 *)device->path[i].conf_data ==
b179b037
SH		 1795 private->conf_data) {
1796 private->conf_data = NULL;
1797 private->conf_len = 0;
1798 }
c9346151 1799 device->path[i].conf_data = NULL;
a521b048
SH		 1800 device->path[i].cssid = 0;
1801 device->path[i].ssid = 0;
1802 device->path[i].chpid = 0;
b179b037 1803 }
4abb08c2
SW		 1804 kfree(private->conf_data);
1805 private->conf_data = NULL;
8e09f215
SW		 1806}
1807
1da177e4
LT		 1808static struct dasd_ccw_req *
1809dasd_eckd_analysis_ccw(struct dasd_device *device)
1810{
543691a4 1811 struct dasd_eckd_private *private = device->private;
1da177e4
LT		 1812 struct eckd_count *count_data;
1813 struct LO_eckd_data *LO_data;
1814 struct dasd_ccw_req *cqr;
1815 struct ccw1 *ccw;
1816 int cplength, datasize;
1817 int i;
1818
1da177e4
LT		 1819 cplength = 8;
1820 datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data);
c5205f2f
SO		 1821 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device,
1822 NULL);
1da177e4
LT		 1823 if (IS_ERR(cqr))
1824 return cqr;
1825 ccw = cqr->cpaddr;
1826 /* Define extent for the first 3 tracks. */
1827 define_extent(ccw++, cqr->data, 0, 2,
45f186be 1828 DASD_ECKD_CCW_READ_COUNT, device, 0);
8e09f215 1829 LO_data = cqr->data + sizeof(struct DE_eckd_data);
1da177e4
LT		 1830 /* Locate record for the first 4 records on track 0. */
1831 ccw[-1].flags |= CCW_FLAG_CC;
1832 locate_record(ccw++, LO_data++, 0, 0, 4,
1833 DASD_ECKD_CCW_READ_COUNT, device, 0);
1834
1835 count_data = private->count_area;
1836 for (i = 0; i < 4; i++) {
1837 ccw[-1].flags |= CCW_FLAG_CC;
1838 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
1839 ccw->flags = 0;
1840 ccw->count = 8;
1841 ccw->cda = (__u32)(addr_t) count_data;
1842 ccw++;
1843 count_data++;
1844 }
1845
1846 /* Locate record for the first record on track 2. */
1847 ccw[-1].flags |= CCW_FLAG_CC;
1848 locate_record(ccw++, LO_data++, 2, 0, 1,
1849 DASD_ECKD_CCW_READ_COUNT, device, 0);
1850 /* Read count ccw. */
1851 ccw[-1].flags |= CCW_FLAG_CC;
1852 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
1853 ccw->flags = 0;
1854 ccw->count = 8;
1855 ccw->cda = (__u32)(addr_t) count_data;
1856
8e09f215
SW		 1857 cqr->block = NULL;
1858 cqr->startdev = device;
1859 cqr->memdev = device;
eb6e199b 1860 cqr->retries = 255;
1aae0560 1861 cqr->buildclk = get_tod_clock();
1da177e4
LT		 1862 cqr->status = DASD_CQR_FILLED;
1863 return cqr;
1864}
1865
eb6e199b
SW		 1866/* differentiate between 'no record found' and any other error */
1867static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr)
1868{
1869 char *sense;
1870 if (init_cqr->status == DASD_CQR_DONE)
1871 return INIT_CQR_OK;
1872 else if (init_cqr->status == DASD_CQR_NEED_ERP ||
1873 init_cqr->status == DASD_CQR_FAILED) {
1874 sense = dasd_get_sense(&init_cqr->irb);
1875 if (sense && (sense[1] & SNS1_NO_REC_FOUND))
1876 return INIT_CQR_UNFORMATTED;
1877 else
1878 return INIT_CQR_ERROR;
1879 } else
1880 return INIT_CQR_ERROR;
1881}
1882
1da177e4
LT		 1883/*
1884 * This is the callback function for the init_analysis cqr. It saves
1885 * the status of the initial analysis ccw before it frees it and kicks
1886 * the device to continue the startup sequence. This will call
1887 * dasd_eckd_do_analysis again (if the devices has not been marked
1888 * for deletion in the meantime).
1889 */
eb6e199b
SW		 1890static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr,
1891 void *data)
1da177e4 1892{
543691a4
SO		 1893 struct dasd_device *device = init_cqr->startdev;
1894 struct dasd_eckd_private *private = device->private;
1da177e4 1895
eb6e199b 1896 private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr);
1da177e4
LT		 1897 dasd_sfree_request(init_cqr, device);
1898 dasd_kick_device(device);
1899}
1900
eb6e199b 1901static int dasd_eckd_start_analysis(struct dasd_block *block)
1da177e4 1902{
1da177e4
LT		 1903 struct dasd_ccw_req *init_cqr;
1904
8e09f215 1905 init_cqr = dasd_eckd_analysis_ccw(block->base);
1da177e4
LT		 1906 if (IS_ERR(init_cqr))
1907 return PTR_ERR(init_cqr);
1908 init_cqr->callback = dasd_eckd_analysis_callback;
1909 init_cqr->callback_data = NULL;
1910 init_cqr->expires = 5*HZ;
eb6e199b
SW		 1911 /* first try without ERP, so we can later handle unformatted
1912 * devices as special case
1913 */
1914 clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags);
1915 init_cqr->retries = 0;
1da177e4
LT		 1916 dasd_add_request_head(init_cqr);
1917 return -EAGAIN;
1918}
1919
eb6e199b 1920static int dasd_eckd_end_analysis(struct dasd_block *block)
1da177e4 1921{
543691a4
SO		 1922 struct dasd_device *device = block->base;
1923 struct dasd_eckd_private *private = device->private;
1da177e4
LT		 1924 struct eckd_count *count_area;
1925 unsigned int sb, blk_per_trk;
1926 int status, i;
eb6e199b 1927 struct dasd_ccw_req *init_cqr;
1da177e4 1928
1da177e4
LT		 1929 status = private->init_cqr_status;
1930 private->init_cqr_status = -1;
eb6e199b
SW		 1931 if (status == INIT_CQR_ERROR) {
1932 /* try again, this time with full ERP */
1933 init_cqr = dasd_eckd_analysis_ccw(device);
1934 dasd_sleep_on(init_cqr);
1935 status = dasd_eckd_analysis_evaluation(init_cqr);
1936 dasd_sfree_request(init_cqr, device);
1937 }
1938
e4dbb0f2
SH		 1939 if (device->features & DASD_FEATURE_USERAW) {
1940 block->bp_block = DASD_RAW_BLOCKSIZE;
1941 blk_per_trk = DASD_RAW_BLOCK_PER_TRACK;
1942 block->s2b_shift = 3;
1943 goto raw;
1944 }
1945
eb6e199b
SW		 1946 if (status == INIT_CQR_UNFORMATTED) {
1947 dev_warn(&device->cdev->dev, "The DASD is not formatted\n");
1da177e4 1948 return -EMEDIUMTYPE;
eb6e199b
SW		 1949 } else if (status == INIT_CQR_ERROR) {
1950 dev_err(&device->cdev->dev,
1951 "Detecting the DASD disk layout failed because "
1952 "of an I/O error\n");
1953 return -EIO;
1da177e4
LT		 1954 }
1955
1956 private->uses_cdl = 1;
1da177e4
LT		 1957 /* Check Track 0 for Compatible Disk Layout */
1958 count_area = NULL;
1959 for (i = 0; i < 3; i++) {
1960 if (private->count_area[i].kl != 4 ||
3bc9fef9
SH		 1961 private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 ||
1962 private->count_area[i].cyl != 0 ||
1963 private->count_area[i].head != count_area_head[i] ||
1964 private->count_area[i].record != count_area_rec[i]) {
1da177e4
LT		 1965 private->uses_cdl = 0;
1966 break;
1967 }
1968 }
1969 if (i == 3)
1970 count_area = &private->count_area[4];
1971
1972 if (private->uses_cdl == 0) {
1973 for (i = 0; i < 5; i++) {
1974 if ((private->count_area[i].kl != 0) ||
1975 (private->count_area[i].dl !=
3bc9fef9
SH		 1976 private->count_area[0].dl) ||
1977 private->count_area[i].cyl != 0 ||
1978 private->count_area[i].head != count_area_head[i] ||
1979 private->count_area[i].record != count_area_rec[i])
1da177e4
LT		 1980 break;
1981 }
1982 if (i == 5)
1983 count_area = &private->count_area[0];
1984 } else {
1985 if (private->count_area[3].record == 1)
fc19f381
SH		 1986 dev_warn(&device->cdev->dev,
1987 "Track 0 has no records following the VTOC\n");
1da177e4 1988 }
e4dbb0f2 1989
1da177e4
LT		 1990 if (count_area != NULL && count_area->kl == 0) {
1991 /* we found notthing violating our disk layout */
1992 if (dasd_check_blocksize(count_area->dl) == 0)
8e09f215 1993 block->bp_block = count_area->dl;
1da177e4 1994 }
8e09f215 1995 if (block->bp_block == 0) {
fc19f381
SH		 1996 dev_warn(&device->cdev->dev,
1997 "The disk layout of the DASD is not supported\n");
1da177e4
LT		 1998 return -EMEDIUMTYPE;
1999 }
8e09f215
SW		 2000 block->s2b_shift = 0; /* bits to shift 512 to get a block */
2001 for (sb = 512; sb < block->bp_block; sb = sb << 1)
2002 block->s2b_shift++;
1da177e4 2003
8e09f215 2004 blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block);
e4dbb0f2
SH		 2005
2006raw:
b44b0ab3 2007 block->blocks = (private->real_cyl *
1da177e4
LT		 2008 private->rdc_data.trk_per_cyl *
2009 blk_per_trk);
2010
fc19f381
SH		 2011 dev_info(&device->cdev->dev,
2012 "DASD with %d KB/block, %d KB total size, %d KB/track, "
2013 "%s\n", (block->bp_block >> 10),
2014 ((private->real_cyl *
2015 private->rdc_data.trk_per_cyl *
2016 blk_per_trk * (block->bp_block >> 9)) >> 1),
2017 ((blk_per_trk * block->bp_block) >> 10),
2018 private->uses_cdl ?
2019 "compatible disk layout" : "linux disk layout");
1da177e4
LT		 2020
2021 return 0;
2022}
2023
8e09f215 2024static int dasd_eckd_do_analysis(struct dasd_block *block)
1da177e4 2025{
543691a4 2026 struct dasd_eckd_private *private = block->base->private;
1da177e4 2027
1da177e4 2028 if (private->init_cqr_status < 0)
8e09f215 2029 return dasd_eckd_start_analysis(block);
1da177e4 2030 else
8e09f215 2031 return dasd_eckd_end_analysis(block);
1da177e4
LT		 2032}
2033
d42e1712 2034static int dasd_eckd_basic_to_ready(struct dasd_device *device)
8e09f215
SW		 2035{
2036 return dasd_alias_add_device(device);
2037};
2038
2039static int dasd_eckd_online_to_ready(struct dasd_device *device)
2040{
669f3765
SH		 2041 if (cancel_work_sync(&device->reload_device))
2042 dasd_put_device(device);
2043 if (cancel_work_sync(&device->kick_validate))
2044 dasd_put_device(device);
2045
d42e1712
SH		 2046 return 0;
2047};
2048
daa991bf 2049static int dasd_eckd_basic_to_known(struct dasd_device *device)
d42e1712 2050{
8e09f215
SW		 2051 return dasd_alias_remove_device(device);
2052};
2053
1da177e4 2054static int
8e09f215 2055dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo)
1da177e4 2056{
543691a4 2057 struct dasd_eckd_private *private = block->base->private;
1da177e4 2058
8e09f215 2059 if (dasd_check_blocksize(block->bp_block) == 0) {
1da177e4 2060 geo->sectors = recs_per_track(&private->rdc_data,
8e09f215 2061 0, block->bp_block);
1da177e4
LT		 2062 }
2063 geo->cylinders = private->rdc_data.no_cyl;
2064 geo->heads = private->rdc_data.trk_per_cyl;
2065 return 0;
2066}
2067
8fd57520
JH		 2068/*
2069 * Build the TCW request for the format check
2070 */
2071static struct dasd_ccw_req *
2072dasd_eckd_build_check_tcw(struct dasd_device *base, struct format_data_t *fdata,
2073 int enable_pav, struct eckd_count *fmt_buffer,
2074 int rpt)
2075{
2076 struct dasd_eckd_private *start_priv;
2077 struct dasd_device *startdev = NULL;
2078 struct tidaw *last_tidaw = NULL;
2079 struct dasd_ccw_req *cqr;
2080 struct itcw *itcw;
2081 int itcw_size;
2082 int count;
2083 int rc;
2084 int i;
2085
2086 if (enable_pav)
2087 startdev = dasd_alias_get_start_dev(base);
2088
2089 if (!startdev)
2090 startdev = base;
2091
2092 start_priv = startdev->private;
2093
2094 count = rpt * (fdata->stop_unit - fdata->start_unit + 1);
2095
2096 /*
2097 * we're adding 'count' amount of tidaw to the itcw.
2098 * calculate the corresponding itcw_size
2099 */
2100 itcw_size = itcw_calc_size(0, count, 0);
2101
c5205f2f
SO		 2102 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev,
2103 NULL);
8fd57520
JH		 2104 if (IS_ERR(cqr))
2105 return cqr;
2106
2107 start_priv->count++;
2108
2109 itcw = itcw_init(cqr->data, itcw_size, ITCW_OP_READ, 0, count, 0);
2110 if (IS_ERR(itcw)) {
2111 rc = -EINVAL;
2112 goto out_err;
2113 }
2114
2115 cqr->cpaddr = itcw_get_tcw(itcw);
2116 rc = prepare_itcw(itcw, fdata->start_unit, fdata->stop_unit,
2117 DASD_ECKD_CCW_READ_COUNT_MT, base, startdev, 0, count,
2118 sizeof(struct eckd_count),
2119 count * sizeof(struct eckd_count), 0, rpt);
2120 if (rc)
2121 goto out_err;
2122
2123 for (i = 0; i < count; i++) {
2124 last_tidaw = itcw_add_tidaw(itcw, 0, fmt_buffer++,
2125 sizeof(struct eckd_count));
2126 if (IS_ERR(last_tidaw)) {
2127 rc = -EINVAL;
2128 goto out_err;
2129 }
2130 }
2131
2132 last_tidaw->flags |= TIDAW_FLAGS_LAST;
2133 itcw_finalize(itcw);
2134
2135 cqr->cpmode = 1;
2136 cqr->startdev = startdev;
2137 cqr->memdev = startdev;
2138 cqr->basedev = base;
2139 cqr->retries = startdev->default_retries;
2140 cqr->expires = startdev->default_expires * HZ;
2141 cqr->buildclk = get_tod_clock();
2142 cqr->status = DASD_CQR_FILLED;
2143 /* Set flags to suppress output for expected errors */
2144 set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags);
2145 set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags);
2146
2147 return cqr;
2148
2149out_err:
2150 dasd_sfree_request(cqr, startdev);
2151
2152 return ERR_PTR(rc);
2153}
2154
2155/*
2156 * Build the CCW request for the format check
2157 */
2158static struct dasd_ccw_req *
2159dasd_eckd_build_check(struct dasd_device *base, struct format_data_t *fdata,
2160 int enable_pav, struct eckd_count *fmt_buffer, int rpt)
2161{
2162 struct dasd_eckd_private *start_priv;
2163 struct dasd_eckd_private *base_priv;
2164 struct dasd_device *startdev = NULL;
2165 struct dasd_ccw_req *cqr;
2166 struct ccw1 *ccw;
2167 void *data;
2168 int cplength, datasize;
2169 int use_prefix;
2170 int count;
2171 int i;
2172
2173 if (enable_pav)
2174 startdev = dasd_alias_get_start_dev(base);
2175
2176 if (!startdev)
2177 startdev = base;
2178
2179 start_priv = startdev->private;
2180 base_priv = base->private;
2181
2182 count = rpt * (fdata->stop_unit - fdata->start_unit + 1);
2183
2184 use_prefix = base_priv->features.feature[8] & 0x01;
2185
2186 if (use_prefix) {
2187 cplength = 1;
2188 datasize = sizeof(struct PFX_eckd_data);
2189 } else {
2190 cplength = 2;
2191 datasize = sizeof(struct DE_eckd_data) +
2192 sizeof(struct LO_eckd_data);
2193 }
2194 cplength += count;
2195
2196 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
c5205f2f 2197 startdev, NULL);
8fd57520
JH		 2198 if (IS_ERR(cqr))
2199 return cqr;
2200
2201 start_priv->count++;
2202 data = cqr->data;
2203 ccw = cqr->cpaddr;
2204
2205 if (use_prefix) {
2206 prefix_LRE(ccw++, data, fdata->start_unit, fdata->stop_unit,
2207 DASD_ECKD_CCW_READ_COUNT, base, startdev, 1, 0,
2208 count, 0, 0);
2209 } else {
2210 define_extent(ccw++, data, fdata->start_unit, fdata->stop_unit,
45f186be 2211 DASD_ECKD_CCW_READ_COUNT, startdev, 0);
8fd57520
JH		 2212
2213 data += sizeof(struct DE_eckd_data);
2214 ccw[-1].flags |= CCW_FLAG_CC;
2215
2216 locate_record(ccw++, data, fdata->start_unit, 0, count,
2217 DASD_ECKD_CCW_READ_COUNT, base, 0);
2218 }
2219
2220 for (i = 0; i < count; i++) {
2221 ccw[-1].flags |= CCW_FLAG_CC;
2222 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
2223 ccw->flags = CCW_FLAG_SLI;
2224 ccw->count = 8;
2225 ccw->cda = (__u32)(addr_t) fmt_buffer;
2226 ccw++;
2227 fmt_buffer++;
2228 }
2229
2230 cqr->startdev = startdev;
2231 cqr->memdev = startdev;
2232 cqr->basedev = base;
2233 cqr->retries = DASD_RETRIES;
2234 cqr->expires = startdev->default_expires * HZ;
2235 cqr->buildclk = get_tod_clock();
2236 cqr->status = DASD_CQR_FILLED;
2237 /* Set flags to suppress output for expected errors */
2238 set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags);
2239
2240 return cqr;
2241}
2242
1da177e4 2243static struct dasd_ccw_req *
d42e1712 2244dasd_eckd_build_format(struct dasd_device *base,
29b8dd9d 2245 struct format_data_t *fdata,
a94fa154 2246 int enable_pav)
1da177e4 2247{
d42e1712
SH		 2248 struct dasd_eckd_private *base_priv;
2249 struct dasd_eckd_private *start_priv;
29b8dd9d 2250 struct dasd_device *startdev = NULL;
1da177e4
LT		 2251 struct dasd_ccw_req *fcp;
2252 struct eckd_count *ect;
d42e1712 2253 struct ch_t address;
1da177e4
LT		 2254 struct ccw1 *ccw;
2255 void *data;
b44b0ab3 2256 int rpt;
1da177e4 2257 int cplength, datasize;
d42e1712 2258 int i, j;
f9a28f7b
JBJ		 2259 int intensity = 0;
2260 int r0_perm;
d42e1712 2261 int nr_tracks;
18d6624e 2262 int use_prefix;
1da177e4 2263
a94fa154 2264 if (enable_pav)
29b8dd9d
SH		 2265 startdev = dasd_alias_get_start_dev(base);
2266
d42e1712
SH		 2267 if (!startdev)
2268 startdev = base;
1da177e4 2269
543691a4
SO		 2270 start_priv = startdev->private;
2271 base_priv = base->private;
d42e1712
SH		 2272
2273 rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize);
2274
2275 nr_tracks = fdata->stop_unit - fdata->start_unit + 1;
1da177e4
LT		 2276
2277 /*
2278 * fdata->intensity is a bit string that tells us what to do:
2279 * Bit 0: write record zero
2280 * Bit 1: write home address, currently not supported
2281 * Bit 2: invalidate tracks
2282 * Bit 3: use OS/390 compatible disk layout (cdl)
f9a28f7b 2283 * Bit 4: do not allow storage subsystem to modify record zero
1da177e4
LT		 2284 * Only some bit combinations do make sense.
2285 */
f9a28f7b
JBJ		 2286 if (fdata->intensity & 0x10) {
2287 r0_perm = 0;
2288 intensity = fdata->intensity & ~0x10;
2289 } else {
2290 r0_perm = 1;
2291 intensity = fdata->intensity;
2292 }
d42e1712 2293
18d6624e
SH		 2294 use_prefix = base_priv->features.feature[8] & 0x01;
2295
f9a28f7b 2296 switch (intensity) {
1da177e4
LT		 2297 case 0x00: /* Normal format */
2298 case 0x08: /* Normal format, use cdl. */
d42e1712 2299 cplength = 2 + (rpt*nr_tracks);
18d6624e
SH		 2300 if (use_prefix)
2301 datasize = sizeof(struct PFX_eckd_data) +
2302 sizeof(struct LO_eckd_data) +
2303 rpt * nr_tracks * sizeof(struct eckd_count);
2304 else
2305 datasize = sizeof(struct DE_eckd_data) +
2306 sizeof(struct LO_eckd_data) +
2307 rpt * nr_tracks * sizeof(struct eckd_count);
1da177e4
LT		 2308 break;
2309 case 0x01: /* Write record zero and format track. */
2310 case 0x09: /* Write record zero and format track, use cdl. */
d42e1712 2311 cplength = 2 + rpt * nr_tracks;
18d6624e
SH		 2312 if (use_prefix)
2313 datasize = sizeof(struct PFX_eckd_data) +
2314 sizeof(struct LO_eckd_data) +
2315 sizeof(struct eckd_count) +
2316 rpt * nr_tracks * sizeof(struct eckd_count);
2317 else
2318 datasize = sizeof(struct DE_eckd_data) +
2319 sizeof(struct LO_eckd_data) +
2320 sizeof(struct eckd_count) +
2321 rpt * nr_tracks * sizeof(struct eckd_count);
1da177e4
LT		 2322 break;
2323 case 0x04: /* Invalidate track. */
2324 case 0x0c: /* Invalidate track, use cdl. */
2325 cplength = 3;
18d6624e
SH		 2326 if (use_prefix)
2327 datasize = sizeof(struct PFX_eckd_data) +
2328 sizeof(struct LO_eckd_data) +
2329 sizeof(struct eckd_count);
2330 else
2331 datasize = sizeof(struct DE_eckd_data) +
2332 sizeof(struct LO_eckd_data) +
2333 sizeof(struct eckd_count);
1da177e4
LT		 2334 break;
2335 default:
d42e1712
SH		 2336 dev_warn(&startdev->cdev->dev,
2337 "An I/O control call used incorrect flags 0x%x\n",
2338 fdata->intensity);
1da177e4
LT		 2339 return ERR_PTR(-EINVAL);
2340 }
2341 /* Allocate the format ccw request. */
d42e1712 2342 fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength,
c5205f2f 2343 datasize, startdev, NULL);
1da177e4
LT		 2344 if (IS_ERR(fcp))
2345 return fcp;
2346
d42e1712 2347 start_priv->count++;
1da177e4
LT		 2348 data = fcp->data;
2349 ccw = fcp->cpaddr;
2350
f9a28f7b 2351 switch (intensity & ~0x08) {
1da177e4 2352 case 0x00: /* Normal format. */
18d6624e
SH		 2353 if (use_prefix) {
2354 prefix(ccw++, (struct PFX_eckd_data *) data,
2355 fdata->start_unit, fdata->stop_unit,
2356 DASD_ECKD_CCW_WRITE_CKD, base, startdev);
2357 /* grant subsystem permission to format R0 */
2358 if (r0_perm)
2359 ((struct PFX_eckd_data *)data)
2360 ->define_extent.ga_extended |= 0x04;
2361 data += sizeof(struct PFX_eckd_data);
2362 } else {
2363 define_extent(ccw++, (struct DE_eckd_data *) data,
2364 fdata->start_unit, fdata->stop_unit,
45f186be 2365 DASD_ECKD_CCW_WRITE_CKD, startdev, 0);
18d6624e
SH		 2366 /* grant subsystem permission to format R0 */
2367 if (r0_perm)
2368 ((struct DE_eckd_data *) data)
2369 ->ga_extended |= 0x04;
2370 data += sizeof(struct DE_eckd_data);
2371 }
1da177e4
LT		 2372 ccw[-1].flags |= CCW_FLAG_CC;
2373 locate_record(ccw++, (struct LO_eckd_data *) data,
d42e1712
SH		 2374 fdata->start_unit, 0, rpt*nr_tracks,
2375 DASD_ECKD_CCW_WRITE_CKD, base,
1da177e4
LT		 2376 fdata->blksize);
2377 data += sizeof(struct LO_eckd_data);
2378 break;
2379 case 0x01: /* Write record zero + format track. */
18d6624e
SH		 2380 if (use_prefix) {
2381 prefix(ccw++, (struct PFX_eckd_data *) data,
2382 fdata->start_unit, fdata->stop_unit,
2383 DASD_ECKD_CCW_WRITE_RECORD_ZERO,
2384 base, startdev);
2385 data += sizeof(struct PFX_eckd_data);
2386 } else {
2387 define_extent(ccw++, (struct DE_eckd_data *) data,
2388 fdata->start_unit, fdata->stop_unit,
45f186be 2389 DASD_ECKD_CCW_WRITE_RECORD_ZERO, startdev, 0);
18d6624e
SH		 2390 data += sizeof(struct DE_eckd_data);
2391 }
1da177e4
LT		 2392 ccw[-1].flags |= CCW_FLAG_CC;
2393 locate_record(ccw++, (struct LO_eckd_data *) data,
d42e1712
SH		 2394 fdata->start_unit, 0, rpt * nr_tracks + 1,
2395 DASD_ECKD_CCW_WRITE_RECORD_ZERO, base,
2396 base->block->bp_block);
1da177e4
LT		 2397 data += sizeof(struct LO_eckd_data);
2398 break;
2399 case 0x04: /* Invalidate track. */
18d6624e
SH		 2400 if (use_prefix) {
2401 prefix(ccw++, (struct PFX_eckd_data *) data,
2402 fdata->start_unit, fdata->stop_unit,
2403 DASD_ECKD_CCW_WRITE_CKD, base, startdev);
2404 data += sizeof(struct PFX_eckd_data);
2405 } else {
2406 define_extent(ccw++, (struct DE_eckd_data *) data,
2407 fdata->start_unit, fdata->stop_unit,
45f186be 2408 DASD_ECKD_CCW_WRITE_CKD, startdev, 0);
18d6624e
SH		 2409 data += sizeof(struct DE_eckd_data);
2410 }
1da177e4
LT		 2411 ccw[-1].flags |= CCW_FLAG_CC;
2412 locate_record(ccw++, (struct LO_eckd_data *) data,
2413 fdata->start_unit, 0, 1,
d42e1712 2414 DASD_ECKD_CCW_WRITE_CKD, base, 8);
1da177e4
LT		 2415 data += sizeof(struct LO_eckd_data);
2416 break;
2417 }
d42e1712
SH		 2418
2419 for (j = 0; j < nr_tracks; j++) {
2420 /* calculate cylinder and head for the current track */
2421 set_ch_t(&address,
2422 (fdata->start_unit + j) /
2423 base_priv->rdc_data.trk_per_cyl,
2424 (fdata->start_unit + j) %
2425 base_priv->rdc_data.trk_per_cyl);
2426 if (intensity & 0x01) { /* write record zero */
1da177e4
LT		 2427 ect = (struct eckd_count *) data;
2428 data += sizeof(struct eckd_count);
b44b0ab3
SW		 2429 ect->cyl = address.cyl;
2430 ect->head = address.head;
d42e1712 2431 ect->record = 0;
1da177e4 2432 ect->kl = 0;
d42e1712 2433 ect->dl = 8;
1da177e4 2434 ccw[-1].flags |= CCW_FLAG_CC;
d42e1712 2435 ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO;
1da177e4
LT		 2436 ccw->flags = CCW_FLAG_SLI;
2437 ccw->count = 8;
2438 ccw->cda = (__u32)(addr_t) ect;
2439 ccw++;
2440 }
d42e1712
SH		 2441 if ((intensity & ~0x08) & 0x04) { /* erase track */
2442 ect = (struct eckd_count *) data;
2443 data += sizeof(struct eckd_count);
2444 ect->cyl = address.cyl;
2445 ect->head = address.head;
2446 ect->record = 1;
2447 ect->kl = 0;
2448 ect->dl = 0;
2449 ccw[-1].flags |= CCW_FLAG_CC;
2450 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD;
2451 ccw->flags = CCW_FLAG_SLI;
2452 ccw->count = 8;
2453 ccw->cda = (__u32)(addr_t) ect;
2454 } else { /* write remaining records */
2455 for (i = 0; i < rpt; i++) {
2456 ect = (struct eckd_count *) data;
2457 data += sizeof(struct eckd_count);
2458 ect->cyl = address.cyl;
2459 ect->head = address.head;
2460 ect->record = i + 1;
2461 ect->kl = 0;
2462 ect->dl = fdata->blksize;
2463 /*
2464 * Check for special tracks 0-1
2465 * when formatting CDL
2466 */
2467 if ((intensity & 0x08) &&
46d1c03c 2468 address.cyl == 0 && address.head == 0) {
d42e1712
SH		 2469 if (i < 3) {
2470 ect->kl = 4;
2471 ect->dl = sizes_trk0[i] - 4;
2472 }
2473 }
2474 if ((intensity & 0x08) &&
46d1c03c 2475 address.cyl == 0 && address.head == 1) {
d42e1712
SH		 2476 ect->kl = 44;
2477 ect->dl = LABEL_SIZE - 44;
2478 }
2479 ccw[-1].flags |= CCW_FLAG_CC;
2480 if (i != 0 || j == 0)
2481 ccw->cmd_code =
2482 DASD_ECKD_CCW_WRITE_CKD;
2483 else
2484 ccw->cmd_code =
2485 DASD_ECKD_CCW_WRITE_CKD_MT;
2486 ccw->flags = CCW_FLAG_SLI;
2487 ccw->count = 8;
ba21d0ea
SH		 2488 ccw->cda = (__u32)(addr_t) ect;
2489 ccw++;
d42e1712
SH		 2490 }
2491 }
1da177e4 2492 }
d42e1712
SH		 2493
2494 fcp->startdev = startdev;
2495 fcp->memdev = startdev;
29b8dd9d 2496 fcp->basedev = base;
eb6e199b 2497 fcp->retries = 256;
d42e1712 2498 fcp->expires = startdev->default_expires * HZ;
1aae0560 2499 fcp->buildclk = get_tod_clock();
1da177e4 2500 fcp->status = DASD_CQR_FILLED;
d42e1712 2501
1da177e4
LT		 2502 return fcp;
2503}
2504
570d237c
JH		 2505/*
2506 * Wrapper function to build a CCW request depending on input data
2507 */
2508static struct dasd_ccw_req *
2509dasd_eckd_format_build_ccw_req(struct dasd_device *base,
8fd57520
JH		 2510 struct format_data_t *fdata, int enable_pav,
2511 int tpm, struct eckd_count *fmt_buffer, int rpt)
570d237c 2512{
8fd57520
JH		 2513 struct dasd_ccw_req *ccw_req;
2514
2515 if (!fmt_buffer) {
2516 ccw_req = dasd_eckd_build_format(base, fdata, enable_pav);
2517 } else {
2518 if (tpm)
2519 ccw_req = dasd_eckd_build_check_tcw(base, fdata,
2520 enable_pav,
2521 fmt_buffer, rpt);
2522 else
2523 ccw_req = dasd_eckd_build_check(base, fdata, enable_pav,
2524 fmt_buffer, rpt);
2525 }
2526
2527 return ccw_req;
570d237c
JH		 2528}
2529
2530/*
2531 * Sanity checks on format_data
2532 */
2533static int dasd_eckd_format_sanity_checks(struct dasd_device *base,
2534 struct format_data_t *fdata)
d42e1712 2535{
543691a4 2536 struct dasd_eckd_private *private = base->private;
d42e1712 2537
d42e1712
SH		 2538 if (fdata->start_unit >=
2539 (private->real_cyl * private->rdc_data.trk_per_cyl)) {
2540 dev_warn(&base->cdev->dev,
2541 "Start track number %u used in formatting is too big\n",
2542 fdata->start_unit);
2543 return -EINVAL;
2544 }
2545 if (fdata->stop_unit >=
2546 (private->real_cyl * private->rdc_data.trk_per_cyl)) {
2547 dev_warn(&base->cdev->dev,
2548 "Stop track number %u used in formatting is too big\n",
2549 fdata->stop_unit);
2550 return -EINVAL;
2551 }
2552 if (fdata->start_unit > fdata->stop_unit) {
2553 dev_warn(&base->cdev->dev,
2554 "Start track %u used in formatting exceeds end track\n",
2555 fdata->start_unit);
2556 return -EINVAL;
2557 }
2558 if (dasd_check_blocksize(fdata->blksize) != 0) {
2559 dev_warn(&base->cdev->dev,
2560 "The DASD cannot be formatted with block size %u\n",
2561 fdata->blksize);
2562 return -EINVAL;
2563 }
570d237c
JH		 2564 return 0;
2565}
2566
2567/*
2568 * This function will process format_data originally coming from an IOCTL
2569 */
2570static int dasd_eckd_format_process_data(struct dasd_device *base,
2571 struct format_data_t *fdata,
8fd57520
JH		 2572 int enable_pav, int tpm,
2573 struct eckd_count *fmt_buffer, int rpt,
2574 struct irb *irb)
570d237c 2575{
543691a4 2576 struct dasd_eckd_private *private = base->private;
570d237c 2577 struct dasd_ccw_req *cqr, *n;
570d237c
JH		 2578 struct list_head format_queue;
2579 struct dasd_device *device;
8fd57520 2580 char *sense = NULL;
570d237c
JH		 2581 int old_start, old_stop, format_step;
2582 int step, retry;
2583 int rc;
2584
570d237c
JH		 2585 rc = dasd_eckd_format_sanity_checks(base, fdata);
2586 if (rc)
2587 return rc;
d42e1712
SH		 2588
2589 INIT_LIST_HEAD(&format_queue);
d42e1712 2590
46d1c03c 2591 old_start = fdata->start_unit;
29b8dd9d 2592 old_stop = fdata->stop_unit;
d42e1712 2593
8fd57520
JH		 2594 if (!tpm && fmt_buffer != NULL) {
2595 /* Command Mode / Format Check */
2596 format_step = 1;
2597 } else if (tpm && fmt_buffer != NULL) {
2598 /* Transport Mode / Format Check */
2599 format_step = DASD_CQR_MAX_CCW / rpt;
2600 } else {
2601 /* Normal Formatting */
2602 format_step = DASD_CQR_MAX_CCW /
2603 recs_per_track(&private->rdc_data, 0, fdata->blksize);
2604 }
2605
46d1c03c
JH		 2606 do {
2607 retry = 0;
2608 while (fdata->start_unit <= old_stop) {
2609 step = fdata->stop_unit - fdata->start_unit + 1;
2610 if (step > format_step) {
2611 fdata->stop_unit =
2612 fdata->start_unit + format_step - 1;
2613 }
d42e1712 2614
570d237c 2615 cqr = dasd_eckd_format_build_ccw_req(base, fdata,
8fd57520
JH		 2616 enable_pav, tpm,
2617 fmt_buffer, rpt);
46d1c03c
JH		 2618 if (IS_ERR(cqr)) {
2619 rc = PTR_ERR(cqr);
2620 if (rc == -ENOMEM) {
2621 if (list_empty(&format_queue))
2622 goto out;
2623 /*
2624 * not enough memory available, start
2625 * requests retry after first requests
2626 * were finished
2627 */
2628 retry = 1;
2629 break;
2630 }
2631 goto out_err;
2632 }
2633 list_add_tail(&cqr->blocklist, &format_queue);
d42e1712 2634
8fd57520
JH		 2635 if (fmt_buffer) {
2636 step = fdata->stop_unit - fdata->start_unit + 1;
2637 fmt_buffer += rpt * step;
2638 }
46d1c03c
JH		 2639 fdata->start_unit = fdata->stop_unit + 1;
2640 fdata->stop_unit = old_stop;
d42e1712 2641 }
d42e1712 2642
46d1c03c
JH		 2643 rc = dasd_sleep_on_queue(&format_queue);
2644
2645out_err:
2646 list_for_each_entry_safe(cqr, n, &format_queue, blocklist) {
2647 device = cqr->startdev;
543691a4 2648 private = device->private;
8fd57520
JH		 2649
2650 if (cqr->status == DASD_CQR_FAILED) {
2651 /*
2652 * Only get sense data if called by format
2653 * check
2654 */
2655 if (fmt_buffer && irb) {
2656 sense = dasd_get_sense(&cqr->irb);
2657 memcpy(irb, &cqr->irb, sizeof(*irb));
2658 }
46d1c03c 2659 rc = -EIO;
8fd57520 2660 }
46d1c03c
JH		 2661 list_del_init(&cqr->blocklist);
2662 dasd_sfree_request(cqr, device);
2663 private->count--;
2664 }
d42e1712 2665
8fd57520 2666 if (rc && rc != -EIO)
46d1c03c 2667 goto out;
8fd57520
JH		 2668 if (rc == -EIO) {
2669 /*
2670 * In case fewer than the expected records are on the
2671 * track, we will most likely get a 'No Record Found'
2672 * error (in command mode) or a 'File Protected' error
2673 * (in transport mode). Those particular cases shouldn't
2674 * pass the -EIO to the IOCTL, therefore reset the rc
2675 * and continue.
2676 */
2677 if (sense &&
2678 (sense[1] & SNS1_NO_REC_FOUND ||
2679 sense[1] & SNS1_FILE_PROTECTED))
2680 retry = 1;
2681 else
2682 goto out;
2683 }
d42e1712 2684
46d1c03c 2685 } while (retry);
29b8dd9d 2686
46d1c03c
JH		 2687out:
2688 fdata->start_unit = old_start;
2689 fdata->stop_unit = old_stop;
d42e1712
SH		 2690
2691 return rc;
2692}
2693
570d237c
JH		 2694static int dasd_eckd_format_device(struct dasd_device *base,
2695 struct format_data_t *fdata, int enable_pav)
2696{
8fd57520
JH		 2697 return dasd_eckd_format_process_data(base, fdata, enable_pav, 0, NULL,
2698 0, NULL);
2699}
2700
2701/*
2702 * Helper function to count consecutive records of a single track.
2703 */
2704static int dasd_eckd_count_records(struct eckd_count *fmt_buffer, int start,
2705 int max)
2706{
2707 int head;
2708 int i;
2709
2710 head = fmt_buffer[start].head;
2711
2712 /*
2713 * There are 3 conditions where we stop counting:
2714 * - if data reoccurs (same head and record may reoccur), which may
2715 * happen due to the way DASD_ECKD_CCW_READ_COUNT works
2716 * - when the head changes, because we're iterating over several tracks
2717 * then (DASD_ECKD_CCW_READ_COUNT_MT)
2718 * - when we've reached the end of sensible data in the buffer (the
2719 * record will be 0 then)
2720 */
2721 for (i = start; i < max; i++) {
2722 if (i > start) {
2723 if ((fmt_buffer[i].head == head &&
2724 fmt_buffer[i].record == 1) ||
2725 fmt_buffer[i].head != head ||
2726 fmt_buffer[i].record == 0)
2727 break;
2728 }
2729 }
2730
2731 return i - start;
2732}
2733
2734/*
2735 * Evaluate a given range of tracks. Data like number of records, blocksize,
2736 * record ids, and key length are compared with expected data.
2737 *
2738 * If a mismatch occurs, the corresponding error bit is set, as well as
2739 * additional information, depending on the error.
2740 */
2741static void dasd_eckd_format_evaluate_tracks(struct eckd_count *fmt_buffer,
2742 struct format_check_t *cdata,
2743 int rpt_max, int rpt_exp,
2744 int trk_per_cyl, int tpm)
2745{
2746 struct ch_t geo;
2747 int max_entries;
2748 int count = 0;
2749 int trkcount;
2750 int blksize;
2751 int pos = 0;
2752 int i, j;
2753 int kl;
2754
2755 trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1;
2756 max_entries = trkcount * rpt_max;
2757
2758 for (i = cdata->expect.start_unit; i <= cdata->expect.stop_unit; i++) {
2759 /* Calculate the correct next starting position in the buffer */
2760 if (tpm) {
2761 while (fmt_buffer[pos].record == 0 &&
2762 fmt_buffer[pos].dl == 0) {
2763 if (pos++ > max_entries)
2764 break;
2765 }
2766 } else {
2767 if (i != cdata->expect.start_unit)
2768 pos += rpt_max - count;
2769 }
2770
2771 /* Calculate the expected geo values for the current track */
2772 set_ch_t(&geo, i / trk_per_cyl, i % trk_per_cyl);
2773
2774 /* Count and check number of records */
2775 count = dasd_eckd_count_records(fmt_buffer, pos, pos + rpt_max);
2776
2777 if (count < rpt_exp) {
2778 cdata->result = DASD_FMT_ERR_TOO_FEW_RECORDS;
2779 break;
2780 }
2781 if (count > rpt_exp) {
2782 cdata->result = DASD_FMT_ERR_TOO_MANY_RECORDS;
2783 break;
2784 }
2785
2786 for (j = 0; j < count; j++, pos++) {
2787 blksize = cdata->expect.blksize;
2788 kl = 0;
2789
2790 /*
2791 * Set special values when checking CDL formatted
2792 * devices.
2793 */
2794 if ((cdata->expect.intensity & 0x08) &&
2795 geo.cyl == 0 && geo.head == 0) {
2796 if (j < 3) {
2797 blksize = sizes_trk0[j] - 4;
2798 kl = 4;
2799 }
2800 }
2801 if ((cdata->expect.intensity & 0x08) &&
2802 geo.cyl == 0 && geo.head == 1) {
2803 blksize = LABEL_SIZE - 44;
2804 kl = 44;
2805 }
2806
2807 /* Check blocksize */
2808 if (fmt_buffer[pos].dl != blksize) {
2809 cdata->result = DASD_FMT_ERR_BLKSIZE;
2810 goto out;
2811 }
2812 /* Check if key length is 0 */
2813 if (fmt_buffer[pos].kl != kl) {
2814 cdata->result = DASD_FMT_ERR_KEY_LENGTH;
2815 goto out;
2816 }
2817 /* Check if record_id is correct */
2818 if (fmt_buffer[pos].cyl != geo.cyl ||
2819 fmt_buffer[pos].head != geo.head ||
2820 fmt_buffer[pos].record != (j + 1)) {
2821 cdata->result = DASD_FMT_ERR_RECORD_ID;
2822 goto out;
2823 }
2824 }
2825 }
2826
2827out:
2828 /*
2829 * In case of no errors, we need to decrease by one
2830 * to get the correct positions.
2831 */
2832 if (!cdata->result) {
2833 i--;
2834 pos--;
2835 }
2836
2837 cdata->unit = i;
2838 cdata->num_records = count;
2839 cdata->rec = fmt_buffer[pos].record;
2840 cdata->blksize = fmt_buffer[pos].dl;
2841 cdata->key_length = fmt_buffer[pos].kl;
2842}
2843
2844/*
2845 * Check the format of a range of tracks of a DASD.
2846 */
2847static int dasd_eckd_check_device_format(struct dasd_device *base,
2848 struct format_check_t *cdata,
2849 int enable_pav)
2850{
2851 struct dasd_eckd_private *private = base->private;
2852 struct eckd_count *fmt_buffer;
2853 struct irb irb;
2854 int rpt_max, rpt_exp;
2855 int fmt_buffer_size;
2856 int trk_per_cyl;
2857 int trkcount;
2858 int tpm = 0;
2859 int rc;
2860
2861 trk_per_cyl = private->rdc_data.trk_per_cyl;
2862
2863 /* Get maximum and expected amount of records per track */
2864 rpt_max = recs_per_track(&private->rdc_data, 0, 512) + 1;
2865 rpt_exp = recs_per_track(&private->rdc_data, 0, cdata->expect.blksize);
2866
2867 trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1;
2868 fmt_buffer_size = trkcount * rpt_max * sizeof(struct eckd_count);
2869
2870 fmt_buffer = kzalloc(fmt_buffer_size, GFP_KERNEL | GFP_DMA);
2871 if (!fmt_buffer)
2872 return -ENOMEM;
2873
2874 /*
2875 * A certain FICON feature subset is needed to operate in transport
2876 * mode. Additionally, the support for transport mode is implicitly
2877 * checked by comparing the buffer size with fcx_max_data. As long as
2878 * the buffer size is smaller we can operate in transport mode and
2879 * process multiple tracks. If not, only one track at once is being
2880 * processed using command mode.
2881 */
2882 if ((private->features.feature[40] & 0x04) &&
2883 fmt_buffer_size <= private->fcx_max_data)
2884 tpm = 1;
2885
2886 rc = dasd_eckd_format_process_data(base, &cdata->expect, enable_pav,
2887 tpm, fmt_buffer, rpt_max, &irb);
2888 if (rc && rc != -EIO)
2889 goto out;
2890 if (rc == -EIO) {
2891 /*
2892 * If our first attempt with transport mode enabled comes back
2893 * with an incorrect length error, we're going to retry the
2894 * check with command mode.
2895 */
2896 if (tpm && scsw_cstat(&irb.scsw) == 0x40) {
2897 tpm = 0;
2898 rc = dasd_eckd_format_process_data(base, &cdata->expect,
2899 enable_pav, tpm,
2900 fmt_buffer, rpt_max,
2901 &irb);
2902 if (rc)
2903 goto out;
2904 } else {
2905 goto out;
2906 }
2907 }
2908
2909 dasd_eckd_format_evaluate_tracks(fmt_buffer, cdata, rpt_max, rpt_exp,
2910 trk_per_cyl, tpm);
2911
2912out:
2913 kfree(fmt_buffer);
2914
2915 return rc;
570d237c
JH		 2916}
2917
8e09f215 2918static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr)
1da177e4 2919{
a2ace466
HR		 2920 if (cqr->retries < 0) {
2921 cqr->status = DASD_CQR_FAILED;
2922 return;
2923 }
8e09f215
SW		 2924 cqr->status = DASD_CQR_FILLED;
2925 if (cqr->block && (cqr->startdev != cqr->block->base)) {
2926 dasd_eckd_reset_ccw_to_base_io(cqr);
2927 cqr->startdev = cqr->block->base;
c9346151 2928 cqr->lpm = dasd_path_get_opm(cqr->block->base);
1da177e4 2929 }
8e09f215 2930};
1da177e4
LT		 2931
2932static dasd_erp_fn_t
2933dasd_eckd_erp_action(struct dasd_ccw_req * cqr)
2934{
8e09f215 2935 struct dasd_device *device = (struct dasd_device *) cqr->startdev;
1da177e4
LT		 2936 struct ccw_device *cdev = device->cdev;
2937
2938 switch (cdev->id.cu_type) {
2939 case 0x3990:
2940 case 0x2105:
2941 case 0x2107:
2942 case 0x1750:
2943 return dasd_3990_erp_action;
2944 case 0x9343:
2945 case 0x3880:
2946 default:
2947 return dasd_default_erp_action;
2948 }
2949}
2950
2951static dasd_erp_fn_t
2952dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr)
2953{
2954 return dasd_default_erp_postaction;
2955}
2956
5a27e60d
SW		 2957static void dasd_eckd_check_for_device_change(struct dasd_device *device,
2958 struct dasd_ccw_req *cqr,
2959 struct irb *irb)
8e09f215
SW		 2960{
2961 char mask;
f3eb5384 2962 char *sense = NULL;
543691a4 2963 struct dasd_eckd_private *private = device->private;
8e09f215
SW		 2964
2965 /* first of all check for state change pending interrupt */
2966 mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP;
f3eb5384 2967 if ((scsw_dstat(&irb->scsw) & mask) == mask) {
c8d1c0ff
SH		 2968 /*
2969 * for alias only, not in offline processing
2970 * and only if not suspended
2971 */
501183f2 2972 if (!device->block && private->lcu &&
25e2cf1c 2973 device->state == DASD_STATE_ONLINE &&
c8d1c0ff
SH		 2974 !test_bit(DASD_FLAG_OFFLINE, &device->flags) &&
2975 !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) {
501183f2
SH		 2976 /* schedule worker to reload device */
2977 dasd_reload_device(device);
2978 }
8e09f215
SW		 2979 dasd_generic_handle_state_change(device);
2980 return;
2981 }
2982
a5a0061f 2983 sense = dasd_get_sense(irb);
5a27e60d
SW		 2984 if (!sense)
2985 return;
2986
2987 /* summary unit check */
c7a29e56 2988 if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) &&
a5a0061f 2989 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) {
59a9ed5f
SH		 2990 if (test_and_set_bit(DASD_FLAG_SUC, &device->flags)) {
2991 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2992 "eckd suc: device already notified");
2993 return;
2994 }
2995 sense = dasd_get_sense(irb);
2996 if (!sense) {
2997 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2998 "eckd suc: no reason code available");
2999 clear_bit(DASD_FLAG_SUC, &device->flags);
3000 return;
3001
3002 }
3003 private->suc_reason = sense[8];
3004 DBF_DEV_EVENT(DBF_NOTICE, device, "%s %x",
3005 "eckd handle summary unit check: reason",
3006 private->suc_reason);
3007 dasd_get_device(device);
3008 if (!schedule_work(&device->suc_work))
3009 dasd_put_device(device);
3010
8e09f215
SW		 3011 return;
3012 }
3013
f60c768c 3014 /* service information message SIM */
5a27e60d 3015 if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) &&
f3eb5384
SW		 3016 ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) {
3017 dasd_3990_erp_handle_sim(device, sense);
f60c768c
SH		 3018 return;
3019 }
3020
5a27e60d
SW		 3021 /* loss of device reservation is handled via base devices only
3022 * as alias devices may be used with several bases
3023 */
c7a29e56
SW		 3024 if (device->block && (sense[27] & DASD_SENSE_BIT_0) &&
3025 (sense[7] == 0x3F) &&
5a27e60d
SW		 3026 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) &&
3027 test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) {
3028 if (device->features & DASD_FEATURE_FAILONSLCK)
3029 set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags);
3030 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags);
3031 dev_err(&device->cdev->dev,
3032 "The device reservation was lost\n");
ada3df91 3033 }
5a27e60d 3034}
f3eb5384
SW		 3035
3036static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single(
3037 struct dasd_device *startdev,
8e09f215 3038 struct dasd_block *block,
f3eb5384
SW		 3039 struct request *req,
3040 sector_t first_rec,
3041 sector_t last_rec,
3042 sector_t first_trk,
3043 sector_t last_trk,
3044 unsigned int first_offs,
3045 unsigned int last_offs,
3046 unsigned int blk_per_trk,
3047 unsigned int blksize)
1da177e4
LT		 3048{
3049 struct dasd_eckd_private *private;
3050 unsigned long *idaws;
3051 struct LO_eckd_data *LO_data;
3052 struct dasd_ccw_req *cqr;
3053 struct ccw1 *ccw;
5705f702 3054 struct req_iterator iter;
7988613b 3055 struct bio_vec bv;
1da177e4 3056 char *dst;
f3eb5384 3057 unsigned int off;
1da177e4 3058 int count, cidaw, cplength, datasize;
f3eb5384 3059 sector_t recid;
1da177e4 3060 unsigned char cmd, rcmd;
8e09f215
SW		 3061 int use_prefix;
3062 struct dasd_device *basedev;
1da177e4 3063
8e09f215 3064 basedev = block->base;
543691a4 3065 private = basedev->private;
1da177e4
LT		 3066 if (rq_data_dir(req) == READ)
3067 cmd = DASD_ECKD_CCW_READ_MT;
3068 else if (rq_data_dir(req) == WRITE)
3069 cmd = DASD_ECKD_CCW_WRITE_MT;
3070 else
3071 return ERR_PTR(-EINVAL);
f3eb5384 3072
1da177e4
LT		 3073 /* Check struct bio and count the number of blocks for the request. */
3074 count = 0;
3075 cidaw = 0;
5705f702 3076 rq_for_each_segment(bv, req, iter) {
7988613b 3077 if (bv.bv_len & (blksize - 1))
6c92e699
JA		 3078 /* Eckd can only do full blocks. */
3079 return ERR_PTR(-EINVAL);
7988613b 3080 count += bv.bv_len >> (block->s2b_shift + 9);
7988613b
KO		 3081 if (idal_is_needed (page_address(bv.bv_page), bv.bv_len))
3082 cidaw += bv.bv_len >> (block->s2b_shift + 9);
1da177e4
LT		 3083 }
3084 /* Paranoia. */
3085 if (count != last_rec - first_rec + 1)
3086 return ERR_PTR(-EINVAL);
8e09f215
SW		 3087
3088 /* use the prefix command if available */
3089 use_prefix = private->features.feature[8] & 0x01;
3090 if (use_prefix) {
3091 /* 1x prefix + number of blocks */
3092 cplength = 2 + count;
3093 /* 1x prefix + cidaws*sizeof(long) */
3094 datasize = sizeof(struct PFX_eckd_data) +
3095 sizeof(struct LO_eckd_data) +
3096 cidaw * sizeof(unsigned long);
3097 } else {
3098 /* 1x define extent + 1x locate record + number of blocks */
3099 cplength = 2 + count;
3100 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */
3101 datasize = sizeof(struct DE_eckd_data) +
3102 sizeof(struct LO_eckd_data) +
3103 cidaw * sizeof(unsigned long);
3104 }
1da177e4
LT		 3105 /* Find out the number of additional locate record ccws for cdl. */
3106 if (private->uses_cdl && first_rec < 2*blk_per_trk) {
3107 if (last_rec >= 2*blk_per_trk)
3108 count = 2*blk_per_trk - first_rec;
3109 cplength += count;
3110 datasize += count*sizeof(struct LO_eckd_data);
3111 }
3112 /* Allocate the ccw request. */
68b781fe 3113 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
c5205f2f 3114 startdev, blk_mq_rq_to_pdu(req));
1da177e4
LT		 3115 if (IS_ERR(cqr))
3116 return cqr;
3117 ccw = cqr->cpaddr;
8e09f215
SW		 3118 /* First ccw is define extent or prefix. */
3119 if (use_prefix) {
3120 if (prefix(ccw++, cqr->data, first_trk,
3121 last_trk, cmd, basedev, startdev) == -EAGAIN) {
3122 /* Clock not in sync and XRC is enabled.
3123 * Try again later.
3124 */
3125 dasd_sfree_request(cqr, startdev);
3126 return ERR_PTR(-EAGAIN);
3127 }
3128 idaws = (unsigned long *) (cqr->data +
3129 sizeof(struct PFX_eckd_data));
3130 } else {
3131 if (define_extent(ccw++, cqr->data, first_trk,
45f186be 3132 last_trk, cmd, basedev, 0) == -EAGAIN) {
8e09f215
SW		 3133 /* Clock not in sync and XRC is enabled.
3134 * Try again later.
3135 */
3136 dasd_sfree_request(cqr, startdev);
3137 return ERR_PTR(-EAGAIN);
3138 }
3139 idaws = (unsigned long *) (cqr->data +
3140 sizeof(struct DE_eckd_data));
d54853ef 3141 }
1da177e4 3142 /* Build locate_record+read/write/ccws. */
1da177e4
LT		 3143 LO_data = (struct LO_eckd_data *) (idaws + cidaw);
3144 recid = first_rec;
3145 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) {
3146 /* Only standard blocks so there is just one locate record. */
3147 ccw[-1].flags |= CCW_FLAG_CC;
3148 locate_record(ccw++, LO_data++, first_trk, first_offs + 1,
8e09f215 3149 last_rec - recid + 1, cmd, basedev, blksize);
1da177e4 3150 }
5705f702 3151 rq_for_each_segment(bv, req, iter) {
7988613b 3152 dst = page_address(bv.bv_page) + bv.bv_offset;
1da177e4
LT		 3153 if (dasd_page_cache) {
3154 char *copy = kmem_cache_alloc(dasd_page_cache,
441e143e 3155 GFP_DMA | __GFP_NOWARN);
1da177e4 3156 if (copy && rq_data_dir(req) == WRITE)
7988613b 3157 memcpy(copy + bv.bv_offset, dst, bv.bv_len);
1da177e4 3158 if (copy)
7988613b 3159 dst = copy + bv.bv_offset;
1da177e4 3160 }
7988613b 3161 for (off = 0; off < bv.bv_len; off += blksize) {
1da177e4
LT		 3162 sector_t trkid = recid;
3163 unsigned int recoffs = sector_div(trkid, blk_per_trk);
3164 rcmd = cmd;
3165 count = blksize;
3166 /* Locate record for cdl special block ? */
3167 if (private->uses_cdl && recid < 2*blk_per_trk) {
3168 if (dasd_eckd_cdl_special(blk_per_trk, recid)){
3169 rcmd |= 0x8;
3170 count = dasd_eckd_cdl_reclen(recid);
ec5883ab
HH		 3171 if (count < blksize &&
3172 rq_data_dir(req) == READ)
1da177e4
LT		 3173 memset(dst + count, 0xe5,
3174 blksize - count);
3175 }
3176 ccw[-1].flags |= CCW_FLAG_CC;
3177 locate_record(ccw++, LO_data++,
3178 trkid, recoffs + 1,
8e09f215 3179 1, rcmd, basedev, count);
1da177e4
LT		 3180 }
3181 /* Locate record for standard blocks ? */
3182 if (private->uses_cdl && recid == 2*blk_per_trk) {
3183 ccw[-1].flags |= CCW_FLAG_CC;
3184 locate_record(ccw++, LO_data++,
3185 trkid, recoffs + 1,
3186 last_rec - recid + 1,
8e09f215 3187 cmd, basedev, count);
1da177e4
LT		 3188 }
3189 /* Read/write ccw. */
3190 ccw[-1].flags |= CCW_FLAG_CC;
3191 ccw->cmd_code = rcmd;
3192 ccw->count = count;
3193 if (idal_is_needed(dst, blksize)) {
3194 ccw->cda = (__u32)(addr_t) idaws;
3195 ccw->flags = CCW_FLAG_IDA;
3196 idaws = idal_create_words(idaws, dst, blksize);
3197 } else {
3198 ccw->cda = (__u32)(addr_t) dst;
3199 ccw->flags = 0;
3200 }
3201 ccw++;
3202 dst += blksize;
3203 recid++;
3204 }
3205 }
13de227b
HS		 3206 if (blk_noretry_request(req) ||
3207 block->base->features & DASD_FEATURE_FAILFAST)
1c01b8a5 3208 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
8e09f215
SW		 3209 cqr->startdev = startdev;
3210 cqr->memdev = startdev;
3211 cqr->block = block;
7c8faa86 3212 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
c9346151 3213 cqr->lpm = dasd_path_get_ppm(startdev);
1f1ee9ad 3214 cqr->retries = startdev->default_retries;
1aae0560 3215 cqr->buildclk = get_tod_clock();
1da177e4
LT		 3216 cqr->status = DASD_CQR_FILLED;
3217 return cqr;
3218}
3219
f3eb5384
SW		 3220static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track(
3221 struct dasd_device *startdev,
3222 struct dasd_block *block,
3223 struct request *req,
3224 sector_t first_rec,
3225 sector_t last_rec,
3226 sector_t first_trk,
3227 sector_t last_trk,
3228 unsigned int first_offs,
3229 unsigned int last_offs,
3230 unsigned int blk_per_trk,
3231 unsigned int blksize)
3232{
f3eb5384
SW		 3233 unsigned long *idaws;
3234 struct dasd_ccw_req *cqr;
3235 struct ccw1 *ccw;
3236 struct req_iterator iter;
7988613b 3237 struct bio_vec bv;
f3eb5384
SW		 3238 char *dst, *idaw_dst;
3239 unsigned int cidaw, cplength, datasize;
3240 unsigned int tlf;
3241 sector_t recid;
3242 unsigned char cmd;
3243 struct dasd_device *basedev;
3244 unsigned int trkcount, count, count_to_trk_end;
3245 unsigned int idaw_len, seg_len, part_len, len_to_track_end;
3246 unsigned char new_track, end_idaw;
3247 sector_t trkid;
3248 unsigned int recoffs;
3249
3250 basedev = block->base;
f3eb5384
SW		 3251 if (rq_data_dir(req) == READ)
3252 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
3253 else if (rq_data_dir(req) == WRITE)
3254 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
3255 else
3256 return ERR_PTR(-EINVAL);
3257
3258 /* Track based I/O needs IDAWs for each page, and not just for
3259 * 64 bit addresses. We need additional idals for pages
3260 * that get filled from two tracks, so we use the number
3261 * of records as upper limit.
3262 */
3263 cidaw = last_rec - first_rec + 1;
3264 trkcount = last_trk - first_trk + 1;
3265
3266 /* 1x prefix + one read/write ccw per track */
3267 cplength = 1 + trkcount;
3268
7bf76f01 3269 datasize = sizeof(struct PFX_eckd_data) + cidaw * sizeof(unsigned long);
f3eb5384
SW		 3270
3271 /* Allocate the ccw request. */
68b781fe 3272 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
c5205f2f 3273 startdev, blk_mq_rq_to_pdu(req));
f3eb5384
SW		 3274 if (IS_ERR(cqr))
3275 return cqr;
3276 ccw = cqr->cpaddr;
3277 /* transfer length factor: how many bytes to read from the last track */
3278 if (first_trk == last_trk)
3279 tlf = last_offs - first_offs + 1;
3280 else
3281 tlf = last_offs + 1;
3282 tlf *= blksize;
3283
3284 if (prefix_LRE(ccw++, cqr->data, first_trk,
3285 last_trk, cmd, basedev, startdev,
3286 1 /* format */, first_offs + 1,
3287 trkcount, blksize,
3288 tlf) == -EAGAIN) {
3289 /* Clock not in sync and XRC is enabled.
3290 * Try again later.
3291 */
3292 dasd_sfree_request(cqr, startdev);
3293 return ERR_PTR(-EAGAIN);
3294 }
3295
3296 /*
3297 * The translation of request into ccw programs must meet the
3298 * following conditions:
3299 * - all idaws but the first and the last must address full pages
3300 * (or 2K blocks on 31-bit)
3301 * - the scope of a ccw and it's idal ends with the track boundaries
3302 */
3303 idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data));
3304 recid = first_rec;
3305 new_track = 1;
3306 end_idaw = 0;
3307 len_to_track_end = 0;
246ccea1 3308 idaw_dst = NULL;
f3eb5384
SW		 3309 idaw_len = 0;
3310 rq_for_each_segment(bv, req, iter) {
7988613b
KO		 3311 dst = page_address(bv.bv_page) + bv.bv_offset;
3312 seg_len = bv.bv_len;
f3eb5384
SW		 3313 while (seg_len) {
3314 if (new_track) {
3315 trkid = recid;
3316 recoffs = sector_div(trkid, blk_per_trk);
3317 count_to_trk_end = blk_per_trk - recoffs;
3318 count = min((last_rec - recid + 1),
3319 (sector_t)count_to_trk_end);
3320 len_to_track_end = count * blksize;
3321 ccw[-1].flags |= CCW_FLAG_CC;
3322 ccw->cmd_code = cmd;
3323 ccw->count = len_to_track_end;
3324 ccw->cda = (__u32)(addr_t)idaws;
3325 ccw->flags = CCW_FLAG_IDA;
3326 ccw++;
3327 recid += count;
3328 new_track = 0;
52db45c3
SW		 3329 /* first idaw for a ccw may start anywhere */
3330 if (!idaw_dst)
3331 idaw_dst = dst;
f3eb5384 3332 }
52db45c3
SW		 3333 /* If we start a new idaw, we must make sure that it
3334 * starts on an IDA_BLOCK_SIZE boundary.
f3eb5384
SW		 3335 * If we continue an idaw, we must make sure that the
3336 * current segment begins where the so far accumulated
3337 * idaw ends
3338 */
52db45c3
SW		 3339 if (!idaw_dst) {
3340 if (__pa(dst) & (IDA_BLOCK_SIZE-1)) {
3341 dasd_sfree_request(cqr, startdev);
3342 return ERR_PTR(-ERANGE);
3343 } else
3344 idaw_dst = dst;
3345 }
f3eb5384
SW		 3346 if ((idaw_dst + idaw_len) != dst) {
3347 dasd_sfree_request(cqr, startdev);
3348 return ERR_PTR(-ERANGE);
3349 }
3350 part_len = min(seg_len, len_to_track_end);
3351 seg_len -= part_len;
3352 dst += part_len;
3353 idaw_len += part_len;
3354 len_to_track_end -= part_len;
3355 /* collected memory area ends on an IDA_BLOCK border,
3356 * -> create an idaw
3357 * idal_create_words will handle cases where idaw_len
3358 * is larger then IDA_BLOCK_SIZE
3359 */
3360 if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1)))
3361 end_idaw = 1;
3362 /* We also need to end the idaw at track end */
3363 if (!len_to_track_end) {
3364 new_track = 1;
3365 end_idaw = 1;
3366 }
3367 if (end_idaw) {
3368 idaws = idal_create_words(idaws, idaw_dst,
3369 idaw_len);
246ccea1 3370 idaw_dst = NULL;
f3eb5384
SW		 3371 idaw_len = 0;
3372 end_idaw = 0;
3373 }
3374 }
3375 }
3376
3377 if (blk_noretry_request(req) ||
3378 block->base->features & DASD_FEATURE_FAILFAST)
3379 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
3380 cqr->startdev = startdev;
3381 cqr->memdev = startdev;
3382 cqr->block = block;
7c8faa86 3383 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
c9346151 3384 cqr->lpm = dasd_path_get_ppm(startdev);
1f1ee9ad 3385 cqr->retries = startdev->default_retries;
1aae0560 3386 cqr->buildclk = get_tod_clock();
f3eb5384
SW		 3387 cqr->status = DASD_CQR_FILLED;
3388 return cqr;
3389}
3390
3391static int prepare_itcw(struct itcw *itcw,
3392 unsigned int trk, unsigned int totrk, int cmd,
3393 struct dasd_device *basedev,
3394 struct dasd_device *startdev,
3395 unsigned int rec_on_trk, int count,
3396 unsigned int blksize,
3397 unsigned int total_data_size,
3398 unsigned int tlf,
3399 unsigned int blk_per_trk)
3400{
3401 struct PFX_eckd_data pfxdata;
3402 struct dasd_eckd_private *basepriv, *startpriv;
3403 struct DE_eckd_data *dedata;
3404 struct LRE_eckd_data *lredata;
3405 struct dcw *dcw;
3406
3407 u32 begcyl, endcyl;
3408 u16 heads, beghead, endhead;
3409 u8 pfx_cmd;
3410
3411 int rc = 0;
3412 int sector = 0;
3413 int dn, d;
3414
3415
3416 /* setup prefix data */
543691a4
SO		 3417 basepriv = basedev->private;
3418 startpriv = startdev->private;
f3eb5384
SW		 3419 dedata = &pfxdata.define_extent;
3420 lredata = &pfxdata.locate_record;
3421
3422 memset(&pfxdata, 0, sizeof(pfxdata));
3423 pfxdata.format = 1; /* PFX with LRE */
3424 pfxdata.base_address = basepriv->ned->unit_addr;
3425 pfxdata.base_lss = basepriv->ned->ID;
3426 pfxdata.validity.define_extent = 1;
3427
3428 /* private uid is kept up to date, conf_data may be outdated */
da340f92
SH		 3429 if (startpriv->uid.type == UA_BASE_PAV_ALIAS)
3430 pfxdata.validity.verify_base = 1;
3431
3432 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) {
f3eb5384 3433 pfxdata.validity.verify_base = 1;
da340f92 3434 pfxdata.validity.hyper_pav = 1;
f3eb5384
SW		 3435 }
3436
3437 switch (cmd) {
3438 case DASD_ECKD_CCW_READ_TRACK_DATA:
3439 dedata->mask.perm = 0x1;
3440 dedata->attributes.operation = basepriv->attrib.operation;
3441 dedata->blk_size = blksize;
3442 dedata->ga_extended |= 0x42;
3443 lredata->operation.orientation = 0x0;
3444 lredata->operation.operation = 0x0C;
3445 lredata->auxiliary.check_bytes = 0x01;
3446 pfx_cmd = DASD_ECKD_CCW_PFX_READ;
3447 break;
3448 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
3449 dedata->mask.perm = 0x02;
3450 dedata->attributes.operation = basepriv->attrib.operation;
3451 dedata->blk_size = blksize;
5628683c 3452 rc = set_timestamp(NULL, dedata, basedev);
f3eb5384
SW		 3453 dedata->ga_extended |= 0x42;
3454 lredata->operation.orientation = 0x0;
3455 lredata->operation.operation = 0x3F;
3456 lredata->extended_operation = 0x23;
3457 lredata->auxiliary.check_bytes = 0x2;
45f186be
JH		 3458 /*
3459 * If XRC is supported the System Time Stamp is set. The
3460 * validity of the time stamp must be reflected in the prefix
3461 * data as well.
3462 */
3463 if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02)
3464 pfxdata.validity.time_stamp = 1; /* 'Time Stamp Valid' */
f3eb5384
SW		 3465 pfx_cmd = DASD_ECKD_CCW_PFX;
3466 break;
8fd57520
JH		 3467 case DASD_ECKD_CCW_READ_COUNT_MT:
3468 dedata->mask.perm = 0x1;
3469 dedata->attributes.operation = DASD_BYPASS_CACHE;
3470 dedata->ga_extended |= 0x42;
3471 dedata->blk_size = blksize;
3472 lredata->operation.orientation = 0x2;
3473 lredata->operation.operation = 0x16;
3474 lredata->auxiliary.check_bytes = 0x01;
3475 pfx_cmd = DASD_ECKD_CCW_PFX_READ;
3476 break;
f3eb5384
SW		 3477 default:
3478 DBF_DEV_EVENT(DBF_ERR, basedev,
3479 "prepare itcw, unknown opcode 0x%x", cmd);
3480 BUG();
3481 break;
3482 }
3483 if (rc)
3484 return rc;
3485
3486 dedata->attributes.mode = 0x3; /* ECKD */
3487
3488 heads = basepriv->rdc_data.trk_per_cyl;
3489 begcyl = trk / heads;
3490 beghead = trk % heads;
3491 endcyl = totrk / heads;
3492 endhead = totrk % heads;
3493
3494 /* check for sequential prestage - enhance cylinder range */
3495 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE ||
3496 dedata->attributes.operation == DASD_SEQ_ACCESS) {
3497
3498 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl)
3499 endcyl += basepriv->attrib.nr_cyl;
3500 else
3501 endcyl = (basepriv->real_cyl - 1);
3502 }
3503
3504 set_ch_t(&dedata->beg_ext, begcyl, beghead);
3505 set_ch_t(&dedata->end_ext, endcyl, endhead);
3506
3507 dedata->ep_format = 0x20; /* records per track is valid */
3508 dedata->ep_rec_per_track = blk_per_trk;
3509
3510 if (rec_on_trk) {
3511 switch (basepriv->rdc_data.dev_type) {
3512 case 0x3390:
3513 dn = ceil_quot(blksize + 6, 232);
3514 d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34);
3515 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
3516 break;
3517 case 0x3380:
3518 d = 7 + ceil_quot(blksize + 12, 32);
3519 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
3520 break;
3521 }
3522 }
3523
8fd57520
JH		 3524 if (cmd == DASD_ECKD_CCW_READ_COUNT_MT) {
3525 lredata->auxiliary.length_valid = 0;
3526 lredata->auxiliary.length_scope = 0;
3527 lredata->sector = 0xff;
3528 } else {
3529 lredata->auxiliary.length_valid = 1;
3530 lredata->auxiliary.length_scope = 1;
3531 lredata->sector = sector;
3532 }
f3eb5384
SW		 3533 lredata->auxiliary.imbedded_ccw_valid = 1;
3534 lredata->length = tlf;
3535 lredata->imbedded_ccw = cmd;
3536 lredata->count = count;
f3eb5384
SW		 3537 set_ch_t(&lredata->seek_addr, begcyl, beghead);
3538 lredata->search_arg.cyl = lredata->seek_addr.cyl;
3539 lredata->search_arg.head = lredata->seek_addr.head;
3540 lredata->search_arg.record = rec_on_trk;
3541
3542 dcw = itcw_add_dcw(itcw, pfx_cmd, 0,
3543 &pfxdata, sizeof(pfxdata), total_data_size);
757853ea 3544 return PTR_ERR_OR_ZERO(dcw);
f3eb5384
SW		 3545}
3546
3547static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track(
3548 struct dasd_device *startdev,
3549 struct dasd_block *block,
3550 struct request *req,
3551 sector_t first_rec,
3552 sector_t last_rec,
3553 sector_t first_trk,
3554 sector_t last_trk,
3555 unsigned int first_offs,
3556 unsigned int last_offs,
3557 unsigned int blk_per_trk,
3558 unsigned int blksize)
3559{
f3eb5384
SW		 3560 struct dasd_ccw_req *cqr;
3561 struct req_iterator iter;
7988613b 3562 struct bio_vec bv;
f3eb5384
SW		 3563 char *dst;
3564 unsigned int trkcount, ctidaw;
3565 unsigned char cmd;
3566 struct dasd_device *basedev;
3567 unsigned int tlf;
3568 struct itcw *itcw;
3569 struct tidaw *last_tidaw = NULL;
3570 int itcw_op;
3571 size_t itcw_size;
ef19298b
SW		 3572 u8 tidaw_flags;
3573 unsigned int seg_len, part_len, len_to_track_end;
3574 unsigned char new_track;
3575 sector_t recid, trkid;
3576 unsigned int offs;
3577 unsigned int count, count_to_trk_end;
cd10502b 3578 int ret;
f3eb5384
SW		 3579
3580 basedev = block->base;
f3eb5384
SW		 3581 if (rq_data_dir(req) == READ) {
3582 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
3583 itcw_op = ITCW_OP_READ;
3584 } else if (rq_data_dir(req) == WRITE) {
3585 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
3586 itcw_op = ITCW_OP_WRITE;
3587 } else
3588 return ERR_PTR(-EINVAL);
3589
3590 /* trackbased I/O needs address all memory via TIDAWs,
3591 * not just for 64 bit addresses. This allows us to map
3592 * each segment directly to one tidaw.
ef19298b
SW		 3593 * In the case of write requests, additional tidaws may
3594 * be needed when a segment crosses a track boundary.
f3eb5384
SW		 3595 */
3596 trkcount = last_trk - first_trk + 1;
3597 ctidaw = 0;
3598 rq_for_each_segment(bv, req, iter) {
3599 ++ctidaw;
3600 }
ef19298b
SW		 3601 if (rq_data_dir(req) == WRITE)
3602 ctidaw += (last_trk - first_trk);
f3eb5384
SW		 3603
3604 /* Allocate the ccw request. */
3605 itcw_size = itcw_calc_size(0, ctidaw, 0);
c5205f2f
SO		 3606 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev,
3607 blk_mq_rq_to_pdu(req));
f3eb5384
SW		 3608 if (IS_ERR(cqr))
3609 return cqr;
3610
f3eb5384
SW		 3611 /* transfer length factor: how many bytes to read from the last track */
3612 if (first_trk == last_trk)
3613 tlf = last_offs - first_offs + 1;
3614 else
3615 tlf = last_offs + 1;
3616 tlf *= blksize;
3617
3618 itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0);
ef19298b 3619 if (IS_ERR(itcw)) {
cd10502b
JL		 3620 ret = -EINVAL;
3621 goto out_error;
ef19298b 3622 }
f3eb5384 3623 cqr->cpaddr = itcw_get_tcw(itcw);
f3eb5384
SW		 3624 if (prepare_itcw(itcw, first_trk, last_trk,
3625 cmd, basedev, startdev,
3626 first_offs + 1,
3627 trkcount, blksize,
3628 (last_rec - first_rec + 1) * blksize,
3629 tlf, blk_per_trk) == -EAGAIN) {
3630 /* Clock not in sync and XRC is enabled.
3631 * Try again later.
3632 */
cd10502b
JL		 3633 ret = -EAGAIN;
3634 goto out_error;
f3eb5384 3635 }
d54cddb6 3636 len_to_track_end = 0;
f3eb5384
SW		 3637 /*
3638 * A tidaw can address 4k of memory, but must not cross page boundaries
3639 * We can let the block layer handle this by setting
3640 * blk_queue_segment_boundary to page boundaries and
3641 * blk_max_segment_size to page size when setting up the request queue.
ef19298b
SW		 3642 * For write requests, a TIDAW must not cross track boundaries, because
3643 * we have to set the CBC flag on the last tidaw for each track.
f3eb5384 3644 */
ef19298b
SW		 3645 if (rq_data_dir(req) == WRITE) {
3646 new_track = 1;
3647 recid = first_rec;
3648 rq_for_each_segment(bv, req, iter) {
7988613b
KO		 3649 dst = page_address(bv.bv_page) + bv.bv_offset;
3650 seg_len = bv.bv_len;
ef19298b
SW		 3651 while (seg_len) {
3652 if (new_track) {
3653 trkid = recid;
3654 offs = sector_div(trkid, blk_per_trk);
3655 count_to_trk_end = blk_per_trk - offs;
3656 count = min((last_rec - recid + 1),
3657 (sector_t)count_to_trk_end);
3658 len_to_track_end = count * blksize;
3659 recid += count;
3660 new_track = 0;
3661 }
3662 part_len = min(seg_len, len_to_track_end);
3663 seg_len -= part_len;
3664 len_to_track_end -= part_len;
3665 /* We need to end the tidaw at track end */
3666 if (!len_to_track_end) {
3667 new_track = 1;
3668 tidaw_flags = TIDAW_FLAGS_INSERT_CBC;
3669 } else
3670 tidaw_flags = 0;
3671 last_tidaw = itcw_add_tidaw(itcw, tidaw_flags,
3672 dst, part_len);
cd10502b
JL		 3673 if (IS_ERR(last_tidaw)) {
3674 ret = -EINVAL;
3675 goto out_error;
3676 }
ef19298b
SW		 3677 dst += part_len;
3678 }
3679 }
3680 } else {
3681 rq_for_each_segment(bv, req, iter) {
7988613b 3682 dst = page_address(bv.bv_page) + bv.bv_offset;
ef19298b 3683 last_tidaw = itcw_add_tidaw(itcw, 0x00,
7988613b 3684 dst, bv.bv_len);
cd10502b
JL		 3685 if (IS_ERR(last_tidaw)) {
3686 ret = -EINVAL;
3687 goto out_error;
3688 }
ef19298b 3689 }
f3eb5384 3690 }
ef19298b
SW		 3691 last_tidaw->flags |= TIDAW_FLAGS_LAST;
3692 last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC;
f3eb5384
SW		 3693 itcw_finalize(itcw);
3694
3695 if (blk_noretry_request(req) ||
3696 block->base->features & DASD_FEATURE_FAILFAST)
3697 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
ef19298b 3698 cqr->cpmode = 1;
f3eb5384
SW		 3699 cqr->startdev = startdev;
3700 cqr->memdev = startdev;
3701 cqr->block = block;
7c8faa86 3702 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
c9346151 3703 cqr->lpm = dasd_path_get_ppm(startdev);
1f1ee9ad 3704 cqr->retries = startdev->default_retries;
1aae0560 3705 cqr->buildclk = get_tod_clock();
f3eb5384
SW		 3706 cqr->status = DASD_CQR_FILLED;
3707 return cqr;
cd10502b
JL		 3708out_error:
3709 dasd_sfree_request(cqr, startdev);
3710 return ERR_PTR(ret);
f3eb5384
SW		 3711}
3712
3713static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev,
3714 struct dasd_block *block,
3715 struct request *req)
3716{
ef19298b 3717 int cmdrtd, cmdwtd;
f3eb5384 3718 int use_prefix;
ef19298b 3719 int fcx_multitrack;
45b44d76 3720 struct dasd_eckd_private *private;
f3eb5384
SW		 3721 struct dasd_device *basedev;
3722 sector_t first_rec, last_rec;
3723 sector_t first_trk, last_trk;
3724 unsigned int first_offs, last_offs;
3725 unsigned int blk_per_trk, blksize;
3726 int cdlspecial;
ef19298b 3727 unsigned int data_size;
f3eb5384
SW		 3728 struct dasd_ccw_req *cqr;
3729
3730 basedev = block->base;
543691a4 3731 private = basedev->private;
f3eb5384
SW		 3732
3733 /* Calculate number of blocks/records per track. */
3734 blksize = block->bp_block;
3735 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
6fca97a9
SH		 3736 if (blk_per_trk == 0)
3737 return ERR_PTR(-EINVAL);
f3eb5384 3738 /* Calculate record id of first and last block. */
83096ebf 3739 first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift;
f3eb5384
SW		 3740 first_offs = sector_div(first_trk, blk_per_trk);
3741 last_rec = last_trk =
83096ebf 3742 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift;
f3eb5384
SW		 3743 last_offs = sector_div(last_trk, blk_per_trk);
3744 cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk);
3745
ef19298b
SW		 3746 fcx_multitrack = private->features.feature[40] & 0x20;
3747 data_size = blk_rq_bytes(req);
26a35f37
SW		 3748 if (data_size % blksize)
3749 return ERR_PTR(-EINVAL);
ef19298b
SW		 3750 /* tpm write request add CBC data on each track boundary */
3751 if (rq_data_dir(req) == WRITE)
3752 data_size += (last_trk - first_trk) * 4;
f3eb5384
SW		 3753
3754 /* is read track data and write track data in command mode supported? */
3755 cmdrtd = private->features.feature[9] & 0x20;
3756 cmdwtd = private->features.feature[12] & 0x40;
3757 use_prefix = private->features.feature[8] & 0x01;
3758
3759 cqr = NULL;
3760 if (cdlspecial || dasd_page_cache) {
3761 /* do nothing, just fall through to the cmd mode single case */
ef19298b
SW		 3762 } else if ((data_size <= private->fcx_max_data)
3763 && (fcx_multitrack || (first_trk == last_trk))) {
f3eb5384
SW		 3764 cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req,
3765 first_rec, last_rec,
3766 first_trk, last_trk,
3767 first_offs, last_offs,
3768 blk_per_trk, blksize);
ef19298b
SW		 3769 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) &&
3770 (PTR_ERR(cqr) != -ENOMEM))
f3eb5384
SW		 3771 cqr = NULL;
3772 } else if (use_prefix &&
3773 (((rq_data_dir(req) == READ) && cmdrtd) ||
3774 ((rq_data_dir(req) == WRITE) && cmdwtd))) {
3775 cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req,
3776 first_rec, last_rec,
3777 first_trk, last_trk,
3778 first_offs, last_offs,
3779 blk_per_trk, blksize);
ef19298b
SW		 3780 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) &&
3781 (PTR_ERR(cqr) != -ENOMEM))
f3eb5384
SW		 3782 cqr = NULL;
3783 }
3784 if (!cqr)
3785 cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req,
3786 first_rec, last_rec,
3787 first_trk, last_trk,
3788 first_offs, last_offs,
3789 blk_per_trk, blksize);
3790 return cqr;
3791}
3792
bbc7f7ea
JH		 3793static struct dasd_ccw_req *dasd_eckd_build_cp_raw(struct dasd_device *startdev,
3794 struct dasd_block *block,
3795 struct request *req)
e4dbb0f2 3796{
9d2be0c1
JH		 3797 sector_t start_padding_sectors, end_sector_offset, end_padding_sectors;
3798 unsigned int seg_len, len_to_track_end;
3799 unsigned int cidaw, cplength, datasize;
3800 sector_t first_trk, last_trk, sectors;
3801 struct dasd_eckd_private *base_priv;
e4dbb0f2 3802 struct dasd_device *basedev;
e4dbb0f2 3803 struct req_iterator iter;
9d2be0c1
JH		 3804 struct dasd_ccw_req *cqr;
3805 unsigned int first_offs;
3806 unsigned int trkcount;
3807 unsigned long *idaws;
3808 unsigned int size;
3809 unsigned char cmd;
7988613b 3810 struct bio_vec bv;
9d2be0c1
JH		 3811 struct ccw1 *ccw;
3812 int use_prefix;
3813 void *data;
e4dbb0f2 3814 char *dst;
e4dbb0f2
SH		 3815
3816 /*
3817 * raw track access needs to be mutiple of 64k and on 64k boundary
558b9ef0
SW		 3818 * For read requests we can fix an incorrect alignment by padding
3819 * the request with dummy pages.
e4dbb0f2 3820 */
558b9ef0
SW		 3821 start_padding_sectors = blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK;
3822 end_sector_offset = (blk_rq_pos(req) + blk_rq_sectors(req)) %
3823 DASD_RAW_SECTORS_PER_TRACK;
3824 end_padding_sectors = (DASD_RAW_SECTORS_PER_TRACK - end_sector_offset) %
3825 DASD_RAW_SECTORS_PER_TRACK;
3826 basedev = block->base;
3827 if ((start_padding_sectors || end_padding_sectors) &&
3828 (rq_data_dir(req) == WRITE)) {
3829 DBF_DEV_EVENT(DBF_ERR, basedev,
3830 "raw write not track aligned (%lu,%lu) req %p",
3831 start_padding_sectors, end_padding_sectors, req);
9d2be0c1 3832 return ERR_PTR(-EINVAL);
e4dbb0f2
SH		 3833 }
3834
3835 first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK;
3836 last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) /
3837 DASD_RAW_SECTORS_PER_TRACK;
3838 trkcount = last_trk - first_trk + 1;
3839 first_offs = 0;
e4dbb0f2
SH		 3840
3841 if (rq_data_dir(req) == READ)
3842 cmd = DASD_ECKD_CCW_READ_TRACK;
3843 else if (rq_data_dir(req) == WRITE)
3844 cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK;
9d2be0c1
JH		 3845 else
3846 return ERR_PTR(-EINVAL);
e4dbb0f2
SH		 3847
3848 /*
3849 * Raw track based I/O needs IDAWs for each page,
3850 * and not just for 64 bit addresses.
3851 */
3852 cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK;
3853
e4dbb0f2 3854 /*
9d2be0c1
JH		 3855 * struct PFX_eckd_data and struct LRE_eckd_data can have up to 2 bytes
3856 * of extended parameter. This is needed for write full track.
e4dbb0f2 3857 */
9d2be0c1
JH		 3858 base_priv = basedev->private;
3859 use_prefix = base_priv->features.feature[8] & 0x01;
3860 if (use_prefix) {
3861 cplength = 1 + trkcount;
3862 size = sizeof(struct PFX_eckd_data) + 2;
3863 } else {
3864 cplength = 2 + trkcount;
3865 size = sizeof(struct DE_eckd_data) +
3866 sizeof(struct LRE_eckd_data) + 2;
3867 }
3868 size = ALIGN(size, 8);
e4dbb0f2 3869
7bf76f01 3870 datasize = size + cidaw * sizeof(unsigned long);
e4dbb0f2
SH		 3871
3872 /* Allocate the ccw request. */
3873 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength,
c5205f2f 3874 datasize, startdev, blk_mq_rq_to_pdu(req));
e4dbb0f2 3875 if (IS_ERR(cqr))
9d2be0c1
JH		 3876 return cqr;
3877
e4dbb0f2 3878 ccw = cqr->cpaddr;
9d2be0c1 3879 data = cqr->data;
e4dbb0f2 3880
9d2be0c1
JH		 3881 if (use_prefix) {
3882 prefix_LRE(ccw++, data, first_trk, last_trk, cmd, basedev,
3883 startdev, 1, first_offs + 1, trkcount, 0, 0);
3884 } else {
3885 define_extent(ccw++, data, first_trk, last_trk, cmd, basedev, 0);
3886 ccw[-1].flags |= CCW_FLAG_CC;
3887
3888 data += sizeof(struct DE_eckd_data);
3889 locate_record_ext(ccw++, data, first_trk, first_offs + 1,
3890 trkcount, cmd, basedev, 0, 0);
e4dbb0f2
SH		 3891 }
3892
9d2be0c1 3893 idaws = (unsigned long *)(cqr->data + size);
e4dbb0f2 3894 len_to_track_end = 0;
558b9ef0
SW		 3895 if (start_padding_sectors) {
3896 ccw[-1].flags |= CCW_FLAG_CC;
3897 ccw->cmd_code = cmd;
3898 /* maximum 3390 track size */
3899 ccw->count = 57326;
3900 /* 64k map to one track */
3901 len_to_track_end = 65536 - start_padding_sectors * 512;
3902 ccw->cda = (__u32)(addr_t)idaws;
3903 ccw->flags |= CCW_FLAG_IDA;
3904 ccw->flags |= CCW_FLAG_SLI;
3905 ccw++;
3906 for (sectors = 0; sectors < start_padding_sectors; sectors += 8)
3907 idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE);
3908 }
e4dbb0f2 3909 rq_for_each_segment(bv, req, iter) {
7988613b
KO		 3910 dst = page_address(bv.bv_page) + bv.bv_offset;
3911 seg_len = bv.bv_len;
558b9ef0
SW		 3912 if (cmd == DASD_ECKD_CCW_READ_TRACK)
3913 memset(dst, 0, seg_len);
e4dbb0f2
SH		 3914 if (!len_to_track_end) {
3915 ccw[-1].flags |= CCW_FLAG_CC;
3916 ccw->cmd_code = cmd;
3917 /* maximum 3390 track size */
3918 ccw->count = 57326;
3919 /* 64k map to one track */
3920 len_to_track_end = 65536;
3921 ccw->cda = (__u32)(addr_t)idaws;
3922 ccw->flags |= CCW_FLAG_IDA;
3923 ccw->flags |= CCW_FLAG_SLI;
3924 ccw++;
3925 }
3926 len_to_track_end -= seg_len;
3927 idaws = idal_create_words(idaws, dst, seg_len);
3928 }
558b9ef0
SW		 3929 for (sectors = 0; sectors < end_padding_sectors; sectors += 8)
3930 idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE);
e4dbb0f2
SH		 3931 if (blk_noretry_request(req) ||
3932 block->base->features & DASD_FEATURE_FAILFAST)
3933 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
3934 cqr->startdev = startdev;
3935 cqr->memdev = startdev;
3936 cqr->block = block;
3937 cqr->expires = startdev->default_expires * HZ;
c9346151 3938 cqr->lpm = dasd_path_get_ppm(startdev);
1f1ee9ad 3939 cqr->retries = startdev->default_retries;
1aae0560 3940 cqr->buildclk = get_tod_clock();
e4dbb0f2
SH		 3941 cqr->status = DASD_CQR_FILLED;
3942
e4dbb0f2
SH		 3943 return cqr;
3944}
3945
3946
1da177e4
LT		 3947static int
3948dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req)
3949{
3950 struct dasd_eckd_private *private;
3951 struct ccw1 *ccw;
5705f702 3952 struct req_iterator iter;
7988613b 3953 struct bio_vec bv;
1da177e4
LT		 3954 char *dst, *cda;
3955 unsigned int blksize, blk_per_trk, off;
3956 sector_t recid;
5705f702 3957 int status;
1da177e4
LT		 3958
3959 if (!dasd_page_cache)
3960 goto out;
543691a4 3961 private = cqr->block->base->private;
8e09f215 3962 blksize = cqr->block->bp_block;
1da177e4 3963 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
83096ebf 3964 recid = blk_rq_pos(req) >> cqr->block->s2b_shift;
1da177e4
LT		 3965 ccw = cqr->cpaddr;
3966 /* Skip over define extent & locate record. */
3967 ccw++;
3968 if (private->uses_cdl == 0 || recid > 2*blk_per_trk)
3969 ccw++;
5705f702 3970 rq_for_each_segment(bv, req, iter) {
7988613b
KO		 3971 dst = page_address(bv.bv_page) + bv.bv_offset;
3972 for (off = 0; off < bv.bv_len; off += blksize) {
1da177e4
LT		 3973 /* Skip locate record. */
3974 if (private->uses_cdl && recid <= 2*blk_per_trk)
3975 ccw++;
3976 if (dst) {
3977 if (ccw->flags & CCW_FLAG_IDA)
3978 cda = *((char **)((addr_t) ccw->cda));
3979 else
3980 cda = (char *)((addr_t) ccw->cda);
3981 if (dst != cda) {
3982 if (rq_data_dir(req) == READ)
7988613b 3983 memcpy(dst, cda, bv.bv_len);
1da177e4
LT		 3984 kmem_cache_free(dasd_page_cache,
3985 (void *)((addr_t)cda & PAGE_MASK));
3986 }
3987 dst = NULL;
3988 }
3989 ccw++;
3990 recid++;
3991 }
3992 }
3993out:
3994 status = cqr->status == DASD_CQR_DONE;
8e09f215 3995 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 3996 return status;
3997}
3998
8e09f215 3999/*
f3eb5384 4000 * Modify ccw/tcw in cqr so it can be started on a base device.
8e09f215
SW		 4001 *
4002 * Note that this is not enough to restart the cqr!
4003 * Either reset cqr->startdev as well (summary unit check handling)
4004 * or restart via separate cqr (as in ERP handling).
4005 */
4006void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr)
4007{
4008 struct ccw1 *ccw;
4009 struct PFX_eckd_data *pfxdata;
f3eb5384
SW		 4010 struct tcw *tcw;
4011 struct tccb *tccb;
4012 struct dcw *dcw;
4013
4014 if (cqr->cpmode == 1) {
4015 tcw = cqr->cpaddr;
4016 tccb = tcw_get_tccb(tcw);
4017 dcw = (struct dcw *)&tccb->tca[0];
4018 pfxdata = (struct PFX_eckd_data *)&dcw->cd[0];
8e09f215
SW		 4019 pfxdata->validity.verify_base = 0;
4020 pfxdata->validity.hyper_pav = 0;
f3eb5384
SW		 4021 } else {
4022 ccw = cqr->cpaddr;
4023 pfxdata = cqr->data;
4024 if (ccw->cmd_code == DASD_ECKD_CCW_PFX) {
4025 pfxdata->validity.verify_base = 0;
4026 pfxdata->validity.hyper_pav = 0;
4027 }
8e09f215
SW		 4028 }
4029}
4030
4031#define DASD_ECKD_CHANQ_MAX_SIZE 4
4032
4033static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base,
4034 struct dasd_block *block,
4035 struct request *req)
4036{
4037 struct dasd_eckd_private *private;
4038 struct dasd_device *startdev;
4039 unsigned long flags;
4040 struct dasd_ccw_req *cqr;
4041
4042 startdev = dasd_alias_get_start_dev(base);
4043 if (!startdev)
4044 startdev = base;
543691a4 4045 private = startdev->private;
8e09f215
SW		 4046 if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE)
4047 return ERR_PTR(-EBUSY);
4048
4049 spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags);
4050 private->count++;
e4dbb0f2 4051 if ((base->features & DASD_FEATURE_USERAW))
bbc7f7ea 4052 cqr = dasd_eckd_build_cp_raw(startdev, block, req);
e4dbb0f2
SH		 4053 else
4054 cqr = dasd_eckd_build_cp(startdev, block, req);
8e09f215
SW		 4055 if (IS_ERR(cqr))
4056 private->count--;
4057 spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags);
4058 return cqr;
4059}
4060
4061static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr,
4062 struct request *req)
4063{
4064 struct dasd_eckd_private *private;
4065 unsigned long flags;
4066
4067 spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags);
543691a4 4068 private = cqr->memdev->private;
8e09f215
SW		 4069 private->count--;
4070 spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags);
4071 return dasd_eckd_free_cp(cqr, req);
4072}
4073
1da177e4
LT		 4074static int
4075dasd_eckd_fill_info(struct dasd_device * device,
4076 struct dasd_information2_t * info)
4077{
543691a4 4078 struct dasd_eckd_private *private = device->private;
1da177e4 4079
1da177e4
LT		 4080 info->label_block = 2;
4081 info->FBA_layout = private->uses_cdl ? 0 : 1;
4082 info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL;
543691a4 4083 info->characteristics_size = sizeof(private->rdc_data);
1da177e4 4084 memcpy(info->characteristics, &private->rdc_data,
543691a4 4085 sizeof(private->rdc_data));
4abb08c2
SW		 4086 info->confdata_size = min((unsigned long)private->conf_len,
4087 sizeof(info->configuration_data));
4088 memcpy(info->configuration_data, private->conf_data,
4089 info->confdata_size);
1da177e4
LT		 4090 return 0;
4091}
4092
4093/*
4094 * SECTION: ioctl functions for eckd devices.
4095 */
4096
4097/*
4098 * Release device ioctl.
138c014d 4099 * Buils a channel programm to releases a prior reserved
1da177e4
LT		 4100 * (see dasd_eckd_reserve) device.
4101 */
4102static int
1107ccfb 4103dasd_eckd_release(struct dasd_device *device)
1da177e4 4104{
1da177e4
LT		 4105 struct dasd_ccw_req *cqr;
4106 int rc;
f3eb5384 4107 struct ccw1 *ccw;
f932bcea 4108 int useglobal;
1da177e4
LT		 4109
4110 if (!capable(CAP_SYS_ADMIN))
4111 return -EACCES;
4112
f932bcea 4113 useglobal = 0;
c5205f2f 4114 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL);
1da177e4 4115 if (IS_ERR(cqr)) {
f932bcea
SW		 4116 mutex_lock(&dasd_reserve_mutex);
4117 useglobal = 1;
4118 cqr = &dasd_reserve_req->cqr;
4119 memset(cqr, 0, sizeof(*cqr));
4120 memset(&dasd_reserve_req->ccw, 0,
4121 sizeof(dasd_reserve_req->ccw));
4122 cqr->cpaddr = &dasd_reserve_req->ccw;
4123 cqr->data = &dasd_reserve_req->data;
4124 cqr->magic = DASD_ECKD_MAGIC;
1da177e4 4125 }
f3eb5384
SW		 4126 ccw = cqr->cpaddr;
4127 ccw->cmd_code = DASD_ECKD_CCW_RELEASE;
4128 ccw->flags |= CCW_FLAG_SLI;
4129 ccw->count = 32;
4130 ccw->cda = (__u32)(addr_t) cqr->data;
8e09f215
SW		 4131 cqr->startdev = device;
4132 cqr->memdev = device;
1da177e4 4133 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1c01b8a5 4134 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
336c340b 4135 cqr->retries = 2; /* set retry counter to enable basic ERP */
1da177e4 4136 cqr->expires = 2 * HZ;
1aae0560 4137 cqr->buildclk = get_tod_clock();
1da177e4
LT		 4138 cqr->status = DASD_CQR_FILLED;
4139
4140 rc = dasd_sleep_on_immediatly(cqr);
5a27e60d
SW		 4141 if (!rc)
4142 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags);
1da177e4 4143
f932bcea
SW		 4144 if (useglobal)
4145 mutex_unlock(&dasd_reserve_mutex);
4146 else
4147 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 4148 return rc;
4149}
4150
4151/*
4152 * Reserve device ioctl.
4153 * Options are set to 'synchronous wait for interrupt' and
138c014d
HH		 4154 * 'timeout the request'. This leads to a terminate IO if
4155 * the interrupt is outstanding for a certain time.
1da177e4
LT		 4156 */
4157static int
1107ccfb 4158dasd_eckd_reserve(struct dasd_device *device)
1da177e4 4159{
1da177e4
LT		 4160 struct dasd_ccw_req *cqr;
4161 int rc;
f3eb5384 4162 struct ccw1 *ccw;
f932bcea 4163 int useglobal;
1da177e4
LT		 4164
4165 if (!capable(CAP_SYS_ADMIN))
4166 return -EACCES;
4167
f932bcea 4168 useglobal = 0;
c5205f2f 4169 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL);
1da177e4 4170 if (IS_ERR(cqr)) {
f932bcea
SW		 4171 mutex_lock(&dasd_reserve_mutex);
4172 useglobal = 1;
4173 cqr = &dasd_reserve_req->cqr;
4174 memset(cqr, 0, sizeof(*cqr));
4175 memset(&dasd_reserve_req->ccw, 0,
4176 sizeof(dasd_reserve_req->ccw));
4177 cqr->cpaddr = &dasd_reserve_req->ccw;
4178 cqr->data = &dasd_reserve_req->data;
4179 cqr->magic = DASD_ECKD_MAGIC;
1da177e4 4180 }
f3eb5384
SW		 4181 ccw = cqr->cpaddr;
4182 ccw->cmd_code = DASD_ECKD_CCW_RESERVE;
4183 ccw->flags |= CCW_FLAG_SLI;
4184 ccw->count = 32;
4185 ccw->cda = (__u32)(addr_t) cqr->data;
8e09f215
SW		 4186 cqr->startdev = device;
4187 cqr->memdev = device;
1da177e4 4188 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1c01b8a5 4189 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
336c340b 4190 cqr->retries = 2; /* set retry counter to enable basic ERP */
1da177e4 4191 cqr->expires = 2 * HZ;
1aae0560 4192 cqr->buildclk = get_tod_clock();
1da177e4
LT		 4193 cqr->status = DASD_CQR_FILLED;
4194
4195 rc = dasd_sleep_on_immediatly(cqr);
5a27e60d
SW		 4196 if (!rc)
4197 set_bit(DASD_FLAG_IS_RESERVED, &device->flags);
1da177e4 4198
f932bcea
SW		 4199 if (useglobal)
4200 mutex_unlock(&dasd_reserve_mutex);
4201 else
4202 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 4203 return rc;
4204}
4205
4206/*
4207 * Steal lock ioctl - unconditional reserve device.
138c014d 4208 * Buils a channel programm to break a device's reservation.
1da177e4
LT		 4209 * (unconditional reserve)
4210 */
4211static int
1107ccfb 4212dasd_eckd_steal_lock(struct dasd_device *device)
1da177e4 4213{
1da177e4
LT		 4214 struct dasd_ccw_req *cqr;
4215 int rc;
f3eb5384 4216 struct ccw1 *ccw;
f932bcea 4217 int useglobal;
1da177e4
LT		 4218
4219 if (!capable(CAP_SYS_ADMIN))
4220 return -EACCES;
4221
f932bcea 4222 useglobal = 0;
c5205f2f 4223 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL);
1da177e4 4224 if (IS_ERR(cqr)) {
f932bcea
SW		 4225 mutex_lock(&dasd_reserve_mutex);
4226 useglobal = 1;
4227 cqr = &dasd_reserve_req->cqr;
4228 memset(cqr, 0, sizeof(*cqr));
4229 memset(&dasd_reserve_req->ccw, 0,
4230 sizeof(dasd_reserve_req->ccw));
4231 cqr->cpaddr = &dasd_reserve_req->ccw;
4232 cqr->data = &dasd_reserve_req->data;
4233 cqr->magic = DASD_ECKD_MAGIC;
1da177e4 4234 }
f3eb5384
SW		 4235 ccw = cqr->cpaddr;
4236 ccw->cmd_code = DASD_ECKD_CCW_SLCK;
4237 ccw->flags |= CCW_FLAG_SLI;
4238 ccw->count = 32;
4239 ccw->cda = (__u32)(addr_t) cqr->data;
8e09f215
SW		 4240 cqr->startdev = device;
4241 cqr->memdev = device;
1da177e4 4242 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1c01b8a5 4243 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
336c340b 4244 cqr->retries = 2; /* set retry counter to enable basic ERP */
1da177e4 4245 cqr->expires = 2 * HZ;
1aae0560 4246 cqr->buildclk = get_tod_clock();
1da177e4
LT		 4247 cqr->status = DASD_CQR_FILLED;
4248
4249 rc = dasd_sleep_on_immediatly(cqr);
5a27e60d
SW		 4250 if (!rc)
4251 set_bit(DASD_FLAG_IS_RESERVED, &device->flags);
1da177e4 4252
f932bcea
SW		 4253 if (useglobal)
4254 mutex_unlock(&dasd_reserve_mutex);
4255 else
4256 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 4257 return rc;
4258}
4259
196339f1
SW		 4260/*
4261 * SNID - Sense Path Group ID
4262 * This ioctl may be used in situations where I/O is stalled due to
4263 * a reserve, so if the normal dasd_smalloc_request fails, we use the
4264 * preallocated dasd_reserve_req.
4265 */
4266static int dasd_eckd_snid(struct dasd_device *device,
4267 void __user *argp)
4268{
4269 struct dasd_ccw_req *cqr;
4270 int rc;
4271 struct ccw1 *ccw;
4272 int useglobal;
4273 struct dasd_snid_ioctl_data usrparm;
4274
4275 if (!capable(CAP_SYS_ADMIN))
4276 return -EACCES;
4277
4278 if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
4279 return -EFAULT;
4280
4281 useglobal = 0;
4282 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1,
c5205f2f
SO		 4283 sizeof(struct dasd_snid_data), device,
4284 NULL);
196339f1
SW		 4285 if (IS_ERR(cqr)) {
4286 mutex_lock(&dasd_reserve_mutex);
4287 useglobal = 1;
4288 cqr = &dasd_reserve_req->cqr;
4289 memset(cqr, 0, sizeof(*cqr));
4290 memset(&dasd_reserve_req->ccw, 0,
4291 sizeof(dasd_reserve_req->ccw));
4292 cqr->cpaddr = &dasd_reserve_req->ccw;
4293 cqr->data = &dasd_reserve_req->data;
4294 cqr->magic = DASD_ECKD_MAGIC;
4295 }
4296 ccw = cqr->cpaddr;
4297 ccw->cmd_code = DASD_ECKD_CCW_SNID;
4298 ccw->flags |= CCW_FLAG_SLI;
4299 ccw->count = 12;
4300 ccw->cda = (__u32)(addr_t) cqr->data;
4301 cqr->startdev = device;
4302 cqr->memdev = device;
4303 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
4304 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
5a27e60d 4305 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags);
196339f1
SW		 4306 cqr->retries = 5;
4307 cqr->expires = 10 * HZ;
1aae0560 4308 cqr->buildclk = get_tod_clock();
196339f1
SW		 4309 cqr->status = DASD_CQR_FILLED;
4310 cqr->lpm = usrparm.path_mask;
4311
4312 rc = dasd_sleep_on_immediatly(cqr);
4313 /* verify that I/O processing didn't modify the path mask */
4314 if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask))
4315 rc = -EIO;
4316 if (!rc) {
4317 usrparm.data = *((struct dasd_snid_data *)cqr->data);
4318 if (copy_to_user(argp, &usrparm, sizeof(usrparm)))
4319 rc = -EFAULT;
4320 }
4321
4322 if (useglobal)
4323 mutex_unlock(&dasd_reserve_mutex);
4324 else
4325 dasd_sfree_request(cqr, cqr->memdev);
4326 return rc;
4327}
4328
1da177e4
LT		 4329/*
4330 * Read performance statistics
4331 */
4332static int
1107ccfb 4333dasd_eckd_performance(struct dasd_device *device, void __user *argp)
1da177e4 4334{
1da177e4
LT		 4335 struct dasd_psf_prssd_data *prssdp;
4336 struct dasd_rssd_perf_stats_t *stats;
4337 struct dasd_ccw_req *cqr;
4338 struct ccw1 *ccw;
4339 int rc;
4340
68b781fe 4341 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
8e09f215
SW		 4342 (sizeof(struct dasd_psf_prssd_data) +
4343 sizeof(struct dasd_rssd_perf_stats_t)),
c5205f2f 4344 device, NULL);
1da177e4 4345 if (IS_ERR(cqr)) {
fc19f381 4346 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 4347 "Could not allocate initialization request");
4348 return PTR_ERR(cqr);
4349 }
8e09f215
SW		 4350 cqr->startdev = device;
4351 cqr->memdev = device;
1da177e4 4352 cqr->retries = 0;
eb6e199b 4353 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1da177e4
LT		 4354 cqr->expires = 10 * HZ;
4355
4356 /* Prepare for Read Subsystem Data */
4357 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
8e09f215 4358 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
1da177e4 4359 prssdp->order = PSF_ORDER_PRSSD;
5d67d164 4360 prssdp->suborder = 0x01; /* Performance Statistics */
1da177e4
LT		 4361 prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */
4362
4363 ccw = cqr->cpaddr;
4364 ccw->cmd_code = DASD_ECKD_CCW_PSF;
8e09f215 4365 ccw->count = sizeof(struct dasd_psf_prssd_data);
1da177e4
LT		 4366 ccw->flags |= CCW_FLAG_CC;
4367 ccw->cda = (__u32)(addr_t) prssdp;
4368
4369 /* Read Subsystem Data - Performance Statistics */
4370 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
8e09f215 4371 memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t));
1da177e4
LT		 4372
4373 ccw++;
4374 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
8e09f215 4375 ccw->count = sizeof(struct dasd_rssd_perf_stats_t);
1da177e4
LT		 4376 ccw->cda = (__u32)(addr_t) stats;
4377
1aae0560 4378 cqr->buildclk = get_tod_clock();
1da177e4
LT		 4379 cqr->status = DASD_CQR_FILLED;
4380 rc = dasd_sleep_on(cqr);
4381 if (rc == 0) {
1da177e4
LT		 4382 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
4383 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
1107ccfb
CH		 4384 if (copy_to_user(argp, stats,
4385 sizeof(struct dasd_rssd_perf_stats_t)))
4386 rc = -EFAULT;
1da177e4 4387 }
8e09f215 4388 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 4389 return rc;
4390}
4391
4392/*
4393 * Get attributes (cache operations)
4394 * Returnes the cache attributes used in Define Extend (DE).
4395 */
4396static int
1107ccfb 4397dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp)
1da177e4 4398{
543691a4 4399 struct dasd_eckd_private *private = device->private;
1107ccfb 4400 struct attrib_data_t attrib = private->attrib;
1da177e4
LT		 4401 int rc;
4402
4403 if (!capable(CAP_SYS_ADMIN))
4404 return -EACCES;
1107ccfb 4405 if (!argp)
1da177e4
LT		 4406 return -EINVAL;
4407
1107ccfb
CH		 4408 rc = 0;
4409 if (copy_to_user(argp, (long *) &attrib,
8e09f215 4410 sizeof(struct attrib_data_t)))
1107ccfb 4411 rc = -EFAULT;
1da177e4
LT		 4412
4413 return rc;
4414}
4415
4416/*
4417 * Set attributes (cache operations)
4418 * Stores the attributes for cache operation to be used in Define Extend (DE).
4419 */
4420static int
1107ccfb 4421dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp)
1da177e4 4422{
543691a4 4423 struct dasd_eckd_private *private = device->private;
1da177e4
LT		 4424 struct attrib_data_t attrib;
4425
4426 if (!capable(CAP_SYS_ADMIN))
4427 return -EACCES;
1107ccfb 4428 if (!argp)
1da177e4
LT		 4429 return -EINVAL;
4430
1107ccfb 4431 if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t)))
1da177e4 4432 return -EFAULT;
1da177e4
LT		 4433 private->attrib = attrib;
4434
fc19f381
SH		 4435 dev_info(&device->cdev->dev,
4436 "The DASD cache mode was set to %x (%i cylinder prestage)\n",
4437 private->attrib.operation, private->attrib.nr_cyl);
1da177e4
LT		 4438 return 0;
4439}
4440
ab1d848f
NH		 4441/*
4442 * Issue syscall I/O to EMC Symmetrix array.
4443 * CCWs are PSF and RSSD
4444 */
4445static int dasd_symm_io(struct dasd_device *device, void __user *argp)
4446{
4447 struct dasd_symmio_parms usrparm;
4448 char *psf_data, *rssd_result;
4449 struct dasd_ccw_req *cqr;
4450 struct ccw1 *ccw;
52898025 4451 char psf0, psf1;
ab1d848f
NH		 4452 int rc;
4453
52898025
NH		 4454 if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
4455 return -EACCES;
4456 psf0 = psf1 = 0;
4457
ab1d848f
NH		 4458 /* Copy parms from caller */
4459 rc = -EFAULT;
4460 if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
4461 goto out;
92d62891 4462 if (is_compat_task()) {
f8b06859 4463 /* Make sure pointers are sane even on 31 bit. */
ab1d848f 4464 rc = -EINVAL;
f8b06859
HC		 4465 if ((usrparm.psf_data >> 32) != 0)
4466 goto out;
4467 if ((usrparm.rssd_result >> 32) != 0)
4468 goto out;
4469 usrparm.psf_data &= 0x7fffffffULL;
4470 usrparm.rssd_result &= 0x7fffffffULL;
ab1d848f 4471 }
4a8ef699
SH		 4472 /* at least 2 bytes are accessed and should be allocated */
4473 if (usrparm.psf_data_len < 2) {
4474 DBF_DEV_EVENT(DBF_WARNING, device,
4475 "Symmetrix ioctl invalid data length %d",
4476 usrparm.psf_data_len);
4477 rc = -EINVAL;
4478 goto out;
4479 }
ab1d848f
NH		 4480 /* alloc I/O data area */
4481 psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA);
4482 rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA);
4483 if (!psf_data || !rssd_result) {
4484 rc = -ENOMEM;
4485 goto out_free;
4486 }
4487
4488 /* get syscall header from user space */
4489 rc = -EFAULT;
4490 if (copy_from_user(psf_data,
4491 (void __user *)(unsigned long) usrparm.psf_data,
4492 usrparm.psf_data_len))
4493 goto out_free;
52898025
NH		 4494 psf0 = psf_data[0];
4495 psf1 = psf_data[1];
ab1d848f
NH		 4496
4497 /* setup CCWs for PSF + RSSD */
c5205f2f 4498 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2, 0, device, NULL);
ab1d848f 4499 if (IS_ERR(cqr)) {
fc19f381 4500 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
ab1d848f
NH		 4501 "Could not allocate initialization request");
4502 rc = PTR_ERR(cqr);
4503 goto out_free;
4504 }
4505
4506 cqr->startdev = device;
4507 cqr->memdev = device;
4508 cqr->retries = 3;
4509 cqr->expires = 10 * HZ;
1aae0560 4510 cqr->buildclk = get_tod_clock();
ab1d848f
NH		 4511 cqr->status = DASD_CQR_FILLED;
4512
4513 /* Build the ccws */
4514 ccw = cqr->cpaddr;
4515
4516 /* PSF ccw */
4517 ccw->cmd_code = DASD_ECKD_CCW_PSF;
4518 ccw->count = usrparm.psf_data_len;
4519 ccw->flags |= CCW_FLAG_CC;
4520 ccw->cda = (__u32)(addr_t) psf_data;
4521
4522 ccw++;
4523
4524 /* RSSD ccw */
4525 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
4526 ccw->count = usrparm.rssd_result_len;
4527 ccw->flags = CCW_FLAG_SLI ;
4528 ccw->cda = (__u32)(addr_t) rssd_result;
4529
4530 rc = dasd_sleep_on(cqr);
4531 if (rc)
4532 goto out_sfree;
4533
4534 rc = -EFAULT;
4535 if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result,
4536 rssd_result, usrparm.rssd_result_len))
4537 goto out_sfree;
4538 rc = 0;
4539
4540out_sfree:
4541 dasd_sfree_request(cqr, cqr->memdev);
4542out_free:
4543 kfree(rssd_result);
4544 kfree(psf_data);
4545out:
52898025
NH		 4546 DBF_DEV_EVENT(DBF_WARNING, device,
4547 "Symmetrix ioctl (0x%02x 0x%02x): rc=%d",
4548 (int) psf0, (int) psf1, rc);
ab1d848f
NH		 4549 return rc;
4550}
4551
1107ccfb 4552static int
8e09f215 4553dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp)
1107ccfb 4554{
8e09f215
SW		 4555 struct dasd_device *device = block->base;
4556
1107ccfb
CH		 4557 switch (cmd) {
4558 case BIODASDGATTR:
4559 return dasd_eckd_get_attrib(device, argp);
4560 case BIODASDSATTR:
4561 return dasd_eckd_set_attrib(device, argp);
4562 case BIODASDPSRD:
4563 return dasd_eckd_performance(device, argp);
4564 case BIODASDRLSE:
4565 return dasd_eckd_release(device);
4566 case BIODASDRSRV:
4567 return dasd_eckd_reserve(device);
4568 case BIODASDSLCK:
4569 return dasd_eckd_steal_lock(device);
196339f1
SW		 4570 case BIODASDSNID:
4571 return dasd_eckd_snid(device, argp);
ab1d848f
NH		 4572 case BIODASDSYMMIO:
4573 return dasd_symm_io(device, argp);
1107ccfb 4574 default:
6b79d14e 4575 return -ENOTTY;
1107ccfb
CH		 4576 }
4577}
4578
445b5b49
HH		 4579/*
4580 * Dump the range of CCWs into 'page' buffer
4581 * and return number of printed chars.
4582 */
4d284cac 4583static int
445b5b49
HH		 4584dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page)
4585{
4586 int len, count;
4587 char *datap;
4588
4589 len = 0;
4590 while (from <= to) {
773bab4a 4591 len += sprintf(page + len, PRINTK_HEADER
445b5b49
HH		 4592 " CCW %p: %08X %08X DAT:",
4593 from, ((int *) from)[0], ((int *) from)[1]);
4594
4595 /* get pointer to data (consider IDALs) */
4596 if (from->flags & CCW_FLAG_IDA)
4597 datap = (char *) *((addr_t *) (addr_t) from->cda);
4598 else
4599 datap = (char *) ((addr_t) from->cda);
4600
4601 /* dump data (max 32 bytes) */
4602 for (count = 0; count < from->count && count < 32; count++) {
4603 if (count % 8 == 0) len += sprintf(page + len, " ");
4604 if (count % 4 == 0) len += sprintf(page + len, " ");
4605 len += sprintf(page + len, "%02x", datap[count]);
4606 }
4607 len += sprintf(page + len, "\n");
4608 from++;
4609 }
4610 return len;
4611}
4612
fc19f381 4613static void
aeec92ca
SH		 4614dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb,
4615 char *reason)
fc19f381
SH		 4616{
4617 u64 *sense;
a5a0061f 4618 u64 *stat;
aeec92ca
SH		 4619
4620 sense = (u64 *) dasd_get_sense(irb);
a5a0061f 4621 stat = (u64 *) &irb->scsw;
fc19f381 4622 if (sense) {
a5a0061f
SW		 4623 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : "
4624 "%016llx %016llx %016llx %016llx",
4625 reason, *stat, *((u32 *) (stat + 1)),
ed3640b2 4626 sense[0], sense[1], sense[2], sense[3]);
fc19f381 4627 } else {
a5a0061f
SW		 4628 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s",
4629 reason, *stat, *((u32 *) (stat + 1)),
4630 "NO VALID SENSE");
fc19f381
SH		 4631 }
4632}
4633
1da177e4
LT		 4634/*
4635 * Print sense data and related channel program.
4636 * Parts are printed because printk buffer is only 1024 bytes.
4637 */
f3eb5384 4638static void dasd_eckd_dump_sense_ccw(struct dasd_device *device,
8e09f215 4639 struct dasd_ccw_req *req, struct irb *irb)
1da177e4
LT		 4640{
4641 char *page;
445b5b49
HH		 4642 struct ccw1 *first, *last, *fail, *from, *to;
4643 int len, sl, sct;
1da177e4
LT		 4644
4645 page = (char *) get_zeroed_page(GFP_ATOMIC);
4646 if (page == NULL) {
fc19f381
SH		 4647 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
4648 "No memory to dump sense data\n");
1da177e4
LT		 4649 return;
4650 }
445b5b49 4651 /* dump the sense data */
773bab4a 4652 len = sprintf(page, PRINTK_HEADER
1da177e4 4653 " I/O status report for device %s:\n",
2a0217d5 4654 dev_name(&device->cdev->dev));
773bab4a 4655 len += sprintf(page + len, PRINTK_HEADER
a5a0061f
SW		 4656 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X "
4657 "CS:%02X RC:%d\n",
4658 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw),
4659 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw),
4660 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw),
4661 req ? req->intrc : 0);
773bab4a 4662 len += sprintf(page + len, PRINTK_HEADER
1da177e4 4663 " device %s: Failing CCW: %p\n",
2a0217d5 4664 dev_name(&device->cdev->dev),
23d805b6 4665 (void *) (addr_t) irb->scsw.cmd.cpa);
1da177e4
LT		 4666 if (irb->esw.esw0.erw.cons) {
4667 for (sl = 0; sl < 4; sl++) {
773bab4a 4668 len += sprintf(page + len, PRINTK_HEADER
1da177e4
LT		 4669 " Sense(hex) %2d-%2d:",
4670 (8 * sl), ((8 * sl) + 7));
4671
4672 for (sct = 0; sct < 8; sct++) {
4673 len += sprintf(page + len, " %02x",
4674 irb->ecw[8 * sl + sct]);
4675 }
4676 len += sprintf(page + len, "\n");
4677 }
4678
4679 if (irb->ecw[27] & DASD_SENSE_BIT_0) {
4680 /* 24 Byte Sense Data */
773bab4a 4681 sprintf(page + len, PRINTK_HEADER
445b5b49
HH		 4682 " 24 Byte: %x MSG %x, "
4683 "%s MSGb to SYSOP\n",
4684 irb->ecw[7] >> 4, irb->ecw[7] & 0x0f,
4685 irb->ecw[1] & 0x10 ? "" : "no");
1da177e4
LT		 4686 } else {
4687 /* 32 Byte Sense Data */
773bab4a 4688 sprintf(page + len, PRINTK_HEADER
445b5b49
HH		 4689 " 32 Byte: Format: %x "
4690 "Exception class %x\n",
4691 irb->ecw[6] & 0x0f, irb->ecw[22] >> 4);
1da177e4
LT		 4692 }
4693 } else {
773bab4a 4694 sprintf(page + len, PRINTK_HEADER
445b5b49 4695 " SORRY - NO VALID SENSE AVAILABLE\n");
1da177e4 4696 }
773bab4a 4697 printk(KERN_ERR "%s", page);
445b5b49 4698
8e09f215
SW		 4699 if (req) {
4700 /* req == NULL for unsolicited interrupts */
4701 /* dump the Channel Program (max 140 Bytes per line) */
4702 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */
4703 first = req->cpaddr;
4704 for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++);
4705 to = min(first + 6, last);
773bab4a 4706 len = sprintf(page, PRINTK_HEADER
8e09f215
SW		 4707 " Related CP in req: %p\n", req);
4708 dasd_eckd_dump_ccw_range(first, to, page + len);
773bab4a 4709 printk(KERN_ERR "%s", page);
1da177e4 4710
8e09f215
SW		 4711 /* print failing CCW area (maximum 4) */
4712 /* scsw->cda is either valid or zero */
4713 len = 0;
4714 from = ++to;
23d805b6
PO		 4715 fail = (struct ccw1 *)(addr_t)
4716 irb->scsw.cmd.cpa; /* failing CCW */
8e09f215
SW		 4717 if (from < fail - 2) {
4718 from = fail - 2; /* there is a gap - print header */
773bab4a 4719 len += sprintf(page, PRINTK_HEADER "......\n");
8e09f215
SW		 4720 }
4721 to = min(fail + 1, last);
4722 len += dasd_eckd_dump_ccw_range(from, to, page + len);
4723
4724 /* print last CCWs (maximum 2) */
4725 from = max(from, ++to);
4726 if (from < last - 1) {
4727 from = last - 1; /* there is a gap - print header */
773bab4a 4728 len += sprintf(page + len, PRINTK_HEADER "......\n");
8e09f215
SW		 4729 }
4730 len += dasd_eckd_dump_ccw_range(from, last, page + len);
4731 if (len > 0)
773bab4a 4732 printk(KERN_ERR "%s", page);
1da177e4 4733 }
1da177e4
LT		 4734 free_page((unsigned long) page);
4735}
4736
f3eb5384
SW		 4737
4738/*
4739 * Print sense data from a tcw.
4740 */
4741static void dasd_eckd_dump_sense_tcw(struct dasd_device *device,
4742 struct dasd_ccw_req *req, struct irb *irb)
4743{
4744 char *page;
4745 int len, sl, sct, residual;
f3eb5384 4746 struct tsb *tsb;
ef19298b 4747 u8 *sense, *rcq;
f3eb5384
SW		 4748
4749 page = (char *) get_zeroed_page(GFP_ATOMIC);
4750 if (page == NULL) {
fc19f381 4751 DBF_DEV_EVENT(DBF_WARNING, device, " %s",
f3eb5384
SW		 4752 "No memory to dump sense data");
4753 return;
4754 }
4755 /* dump the sense data */
773bab4a 4756 len = sprintf(page, PRINTK_HEADER
f3eb5384
SW		 4757 " I/O status report for device %s:\n",
4758 dev_name(&device->cdev->dev));
773bab4a 4759 len += sprintf(page + len, PRINTK_HEADER
a5a0061f
SW		 4760 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X "
4761 "CS:%02X fcxs:%02X schxs:%02X RC:%d\n",
4762 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw),
4763 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw),
4764 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw),
a521b048
SH		 4765 irb->scsw.tm.fcxs,
4766 (irb->scsw.tm.ifob << 7) | irb->scsw.tm.sesq,
a5a0061f 4767 req ? req->intrc : 0);
773bab4a 4768 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4769 " device %s: Failing TCW: %p\n",
4770 dev_name(&device->cdev->dev),
4771 (void *) (addr_t) irb->scsw.tm.tcw);
4772
4773 tsb = NULL;
4774 sense = NULL;
a5a0061f 4775 if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01))
f3eb5384
SW		 4776 tsb = tcw_get_tsb(
4777 (struct tcw *)(unsigned long)irb->scsw.tm.tcw);
4778
b8fde722 4779 if (tsb) {
773bab4a 4780 len += sprintf(page + len, PRINTK_HEADER
f3eb5384 4781 " tsb->length %d\n", tsb->length);
773bab4a 4782 len += sprintf(page + len, PRINTK_HEADER
f3eb5384 4783 " tsb->flags %x\n", tsb->flags);
773bab4a 4784 len += sprintf(page + len, PRINTK_HEADER
f3eb5384 4785 " tsb->dcw_offset %d\n", tsb->dcw_offset);
773bab4a 4786 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4787 " tsb->count %d\n", tsb->count);
4788 residual = tsb->count - 28;
773bab4a 4789 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4790 " residual %d\n", residual);
4791
4792 switch (tsb->flags & 0x07) {
4793 case 1: /* tsa_iostat */
773bab4a 4794 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4795 " tsb->tsa.iostat.dev_time %d\n",
4796 tsb->tsa.iostat.dev_time);
773bab4a 4797 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4798 " tsb->tsa.iostat.def_time %d\n",
4799 tsb->tsa.iostat.def_time);
773bab4a 4800 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4801 " tsb->tsa.iostat.queue_time %d\n",
4802 tsb->tsa.iostat.queue_time);
773bab4a 4803 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4804 " tsb->tsa.iostat.dev_busy_time %d\n",
4805 tsb->tsa.iostat.dev_busy_time);
773bab4a 4806 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4807 " tsb->tsa.iostat.dev_act_time %d\n",
4808 tsb->tsa.iostat.dev_act_time);
4809 sense = tsb->tsa.iostat.sense;
4810 break;
4811 case 2: /* ts_ddpc */
773bab4a 4812 len += sprintf(page + len, PRINTK_HEADER
f3eb5384 4813 " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc);
ef19298b 4814 for (sl = 0; sl < 2; sl++) {
773bab4a 4815 len += sprintf(page + len, PRINTK_HEADER
ef19298b
SW		 4816 " tsb->tsa.ddpc.rcq %2d-%2d: ",
4817 (8 * sl), ((8 * sl) + 7));
4818 rcq = tsb->tsa.ddpc.rcq;
f3eb5384
SW		 4819 for (sct = 0; sct < 8; sct++) {
4820 len += sprintf(page + len, " %02x",
ef19298b 4821 rcq[8 * sl + sct]);
f3eb5384
SW		 4822 }
4823 len += sprintf(page + len, "\n");
4824 }
4825 sense = tsb->tsa.ddpc.sense;
4826 break;
4827 case 3: /* tsa_intrg */
773bab4a 4828 len += sprintf(page + len, PRINTK_HEADER
8693b914 4829 " tsb->tsa.intrg.: not supported yet\n");
f3eb5384
SW		 4830 break;
4831 }
4832
4833 if (sense) {
4834 for (sl = 0; sl < 4; sl++) {
773bab4a 4835 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4836 " Sense(hex) %2d-%2d:",
4837 (8 * sl), ((8 * sl) + 7));
4838 for (sct = 0; sct < 8; sct++) {
4839 len += sprintf(page + len, " %02x",
4840 sense[8 * sl + sct]);
4841 }
4842 len += sprintf(page + len, "\n");
4843 }
4844
4845 if (sense[27] & DASD_SENSE_BIT_0) {
4846 /* 24 Byte Sense Data */
773bab4a 4847 sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4848 " 24 Byte: %x MSG %x, "
4849 "%s MSGb to SYSOP\n",
4850 sense[7] >> 4, sense[7] & 0x0f,
4851 sense[1] & 0x10 ? "" : "no");
4852 } else {
4853 /* 32 Byte Sense Data */
773bab4a 4854 sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4855 " 32 Byte: Format: %x "
4856 "Exception class %x\n",
4857 sense[6] & 0x0f, sense[22] >> 4);
4858 }
4859 } else {
773bab4a 4860 sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4861 " SORRY - NO VALID SENSE AVAILABLE\n");
4862 }
4863 } else {
773bab4a 4864 sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4865 " SORRY - NO TSB DATA AVAILABLE\n");
4866 }
773bab4a 4867 printk(KERN_ERR "%s", page);
f3eb5384
SW		 4868 free_page((unsigned long) page);
4869}
4870
4871static void dasd_eckd_dump_sense(struct dasd_device *device,
4872 struct dasd_ccw_req *req, struct irb *irb)
4873{
8fd57520
JH		 4874 u8 *sense = dasd_get_sense(irb);
4875
4876 if (scsw_is_tm(&irb->scsw)) {
4877 /*
4878 * In some cases the 'File Protected' or 'Incorrect Length'
4879 * error might be expected and log messages shouldn't be written
4880 * then. Check if the according suppress bit is set.
4881 */
4882 if (sense && (sense[1] & SNS1_FILE_PROTECTED) &&
4883 test_bit(DASD_CQR_SUPPRESS_FP, &req->flags))
4884 return;
4885 if (scsw_cstat(&irb->scsw) == 0x40 &&
4886 test_bit(DASD_CQR_SUPPRESS_IL, &req->flags))
4887 return;
4888
f3eb5384 4889 dasd_eckd_dump_sense_tcw(device, req, irb);
8fd57520
JH		 4890 } else {
4891 /*
ab24fbd3
SH		 4892 * In some cases the 'Command Reject' or 'No Record Found'
4893 * error might be expected and log messages shouldn't be
4894 * written then. Check if the according suppress bit is set.
8fd57520 4895 */
ab24fbd3
SH		 4896 if (sense && sense[0] & SNS0_CMD_REJECT &&
4897 test_bit(DASD_CQR_SUPPRESS_CR, &req->flags))
4898 return;
4899
8fd57520
JH		 4900 if (sense && sense[1] & SNS1_NO_REC_FOUND &&
4901 test_bit(DASD_CQR_SUPPRESS_NRF, &req->flags))
4902 return;
4903
f3eb5384 4904 dasd_eckd_dump_sense_ccw(device, req, irb);
8fd57520 4905 }
f3eb5384
SW		 4906}
4907
501183f2 4908static int dasd_eckd_pm_freeze(struct dasd_device *device)
d41dd122
SH		 4909{
4910 /*
4911 * the device should be disconnected from our LCU structure
4912 * on restore we will reconnect it and reread LCU specific
4913 * information like PAV support that might have changed
4914 */
4915 dasd_alias_remove_device(device);
4916 dasd_alias_disconnect_device_from_lcu(device);
4917
4918 return 0;
4919}
4920
501183f2 4921static int dasd_eckd_restore_device(struct dasd_device *device)
d41dd122 4922{
543691a4 4923 struct dasd_eckd_private *private = device->private;
6fca97a9 4924 struct dasd_eckd_characteristics temp_rdc_data;
f9f8d02f 4925 int rc;
d41dd122 4926 struct dasd_uid temp_uid;
a7602f6c 4927 unsigned long flags;
ea4da6ea 4928 unsigned long cqr_flags = 0;
d41dd122 4929
d41dd122 4930 /* Read Configuration Data */
251afd69
SH		 4931 rc = dasd_eckd_read_conf(device);
4932 if (rc) {
4933 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
4934 "Read configuration data failed, rc=%d", rc);
4935 goto out_err;
4936 }
d41dd122 4937
2dedf0d9
SH		 4938 dasd_eckd_get_uid(device, &temp_uid);
4939 /* Generate device unique id */
4940 rc = dasd_eckd_generate_uid(device);
4941 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
d41dd122 4942 if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0)
a7602f6c
SH		 4943 dev_err(&device->cdev->dev, "The UID of the DASD has "
4944 "changed\n");
2dedf0d9 4945 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
d41dd122
SH		 4946 if (rc)
4947 goto out_err;
d41dd122
SH		 4948
4949 /* register lcu with alias handling, enable PAV if this is a new lcu */
f9f8d02f
SH		 4950 rc = dasd_alias_make_device_known_to_lcu(device);
4951 if (rc)
251afd69 4952 goto out_err;
ea4da6ea
SH		 4953
4954 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags);
4955 dasd_eckd_validate_server(device, cqr_flags);
f4ac1d02
SW		 4956
4957 /* RE-Read Configuration Data */
251afd69
SH		 4958 rc = dasd_eckd_read_conf(device);
4959 if (rc) {
4960 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
4961 "Read configuration data failed, rc=%d", rc);
4962 goto out_err2;
4963 }
d41dd122
SH		 4964
4965 /* Read Feature Codes */
68d1e5f0 4966 dasd_eckd_read_features(device);
d41dd122
SH		 4967
4968 /* Read Device Characteristics */
68b781fe 4969 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
6fca97a9 4970 &temp_rdc_data, 64);
d41dd122 4971 if (rc) {
b8ed5dd5
SH		 4972 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
4973 "Read device characteristic failed, rc=%d", rc);
251afd69 4974 goto out_err2;
d41dd122 4975 }
a7602f6c 4976 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
6fca97a9 4977 memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data));
a7602f6c 4978 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
d41dd122
SH		 4979
4980 /* add device to alias management */
4981 dasd_alias_add_device(device);
4982
4983 return 0;
4984
251afd69
SH		 4985out_err2:
4986 dasd_alias_disconnect_device_from_lcu(device);
d41dd122 4987out_err:
e6125fba 4988 return -1;
d41dd122
SH		 4989}
4990
501183f2
SH		 4991static int dasd_eckd_reload_device(struct dasd_device *device)
4992{
543691a4 4993 struct dasd_eckd_private *private = device->private;
501183f2 4994 int rc, old_base;
2dedf0d9
SH		 4995 char print_uid[60];
4996 struct dasd_uid uid;
4997 unsigned long flags;
501183f2 4998
59a9ed5f
SH		 4999 /*
5000 * remove device from alias handling to prevent new requests
5001 * from being scheduled on the wrong alias device
5002 */
5003 dasd_alias_remove_device(device);
5004
2dedf0d9 5005 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
501183f2 5006 old_base = private->uid.base_unit_addr;
2dedf0d9
SH		 5007 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
5008
501183f2
SH		 5009 /* Read Configuration Data */
5010 rc = dasd_eckd_read_conf(device);
5011 if (rc)
5012 goto out_err;
5013
2dedf0d9 5014 rc = dasd_eckd_generate_uid(device);
501183f2
SH		 5015 if (rc)
5016 goto out_err;
501183f2
SH		 5017 /*
5018 * update unit address configuration and
5019 * add device to alias management
5020 */
5021 dasd_alias_update_add_device(device);
5022
2dedf0d9
SH		 5023 dasd_eckd_get_uid(device, &uid);
5024
5025 if (old_base != uid.base_unit_addr) {
5026 if (strlen(uid.vduit) > 0)
5027 snprintf(print_uid, sizeof(print_uid),
5028 "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial,
5029 uid.ssid, uid.base_unit_addr, uid.vduit);
501183f2 5030 else
2dedf0d9
SH		 5031 snprintf(print_uid, sizeof(print_uid),
5032 "%s.%s.%04x.%02x", uid.vendor, uid.serial,
5033 uid.ssid, uid.base_unit_addr);
501183f2
SH		 5034
5035 dev_info(&device->cdev->dev,
5036 "An Alias device was reassigned to a new base device "
2dedf0d9 5037 "with UID: %s\n", print_uid);
501183f2
SH		 5038 }
5039 return 0;
5040
5041out_err:
5042 return -1;
5043}
5044
5db8440c
SH		 5045static int dasd_eckd_read_message_buffer(struct dasd_device *device,
5046 struct dasd_rssd_messages *messages,
5047 __u8 lpum)
5048{
5049 struct dasd_rssd_messages *message_buf;
5050 struct dasd_psf_prssd_data *prssdp;
5db8440c
SH		 5051 struct dasd_ccw_req *cqr;
5052 struct ccw1 *ccw;
5053 int rc;
5054
5db8440c
SH		 5055 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
5056 (sizeof(struct dasd_psf_prssd_data) +
5057 sizeof(struct dasd_rssd_messages)),
c5205f2f 5058 device, NULL);
5db8440c
SH		 5059 if (IS_ERR(cqr)) {
5060 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
5061 "Could not allocate read message buffer request");
5062 return PTR_ERR(cqr);
5063 }
5064
af775210
SH		 5065 cqr->lpm = lpum;
5066retry:
5db8440c
SH		 5067 cqr->startdev = device;
5068 cqr->memdev = device;
5069 cqr->block = NULL;
5db8440c 5070 cqr->expires = 10 * HZ;
5db8440c 5071 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags);
b179b037
SH		 5072 /* dasd_sleep_on_immediatly does not do complex error
5073 * recovery so clear erp flag and set retry counter to
5074 * do basic erp */
5075 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
5076 cqr->retries = 256;
5db8440c
SH		 5077
5078 /* Prepare for Read Subsystem Data */
5079 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
5080 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
5081 prssdp->order = PSF_ORDER_PRSSD;
5082 prssdp->suborder = 0x03; /* Message Buffer */
5083 /* all other bytes of prssdp must be zero */
5084
5085 ccw = cqr->cpaddr;
5086 ccw->cmd_code = DASD_ECKD_CCW_PSF;
5087 ccw->count = sizeof(struct dasd_psf_prssd_data);
5088 ccw->flags |= CCW_FLAG_CC;
5089 ccw->flags |= CCW_FLAG_SLI;
5090 ccw->cda = (__u32)(addr_t) prssdp;
5091
5092 /* Read Subsystem Data - message buffer */
5093 message_buf = (struct dasd_rssd_messages *) (prssdp + 1);
5094 memset(message_buf, 0, sizeof(struct dasd_rssd_messages));
5095
5096 ccw++;
5097 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
5098 ccw->count = sizeof(struct dasd_rssd_messages);
5099 ccw->flags |= CCW_FLAG_SLI;
5100 ccw->cda = (__u32)(addr_t) message_buf;
5101
5102 cqr->buildclk = get_tod_clock();
5103 cqr->status = DASD_CQR_FILLED;
5104 rc = dasd_sleep_on_immediatly(cqr);
5105 if (rc == 0) {
5106 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
5107 message_buf = (struct dasd_rssd_messages *)
5108 (prssdp + 1);
5109 memcpy(messages, message_buf,
5110 sizeof(struct dasd_rssd_messages));
af775210
SH		 5111 } else if (cqr->lpm) {
5112 /*
5113 * on z/VM we might not be able to do I/O on the requested path
5114 * but instead we get the required information on any path
5115 * so retry with open path mask
5116 */
5117 cqr->lpm = 0;
5118 goto retry;
5db8440c
SH		 5119 } else
5120 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
5121 "Reading messages failed with rc=%d\n"
5122 , rc);
5123 dasd_sfree_request(cqr, cqr->memdev);
5124 return rc;
5125}
5126
5a3b7b11
SH		 5127static int dasd_eckd_query_host_access(struct dasd_device *device,
5128 struct dasd_psf_query_host_access *data)
5129{
5130 struct dasd_eckd_private *private = device->private;
5131 struct dasd_psf_query_host_access *host_access;
5132 struct dasd_psf_prssd_data *prssdp;
5133 struct dasd_ccw_req *cqr;
5134 struct ccw1 *ccw;
5135 int rc;
5136
5137 /* not available for HYPER PAV alias devices */
5138 if (!device->block && private->lcu->pav == HYPER_PAV)
5139 return -EOPNOTSUPP;
5140
ccd53fa2
SH		 5141 /* may not be supported by the storage server */
5142 if (!(private->features.feature[14] & 0x80))
5143 return -EOPNOTSUPP;
5144
5a3b7b11
SH		 5145 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
5146 sizeof(struct dasd_psf_prssd_data) + 1,
c5205f2f 5147 device, NULL);
5a3b7b11
SH		 5148 if (IS_ERR(cqr)) {
5149 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
5150 "Could not allocate read message buffer request");
5151 return PTR_ERR(cqr);
5152 }
5153 host_access = kzalloc(sizeof(*host_access), GFP_KERNEL | GFP_DMA);
5154 if (!host_access) {
5155 dasd_sfree_request(cqr, device);
5156 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
5157 "Could not allocate host_access buffer");
5158 return -ENOMEM;
5159 }
5160 cqr->startdev = device;
5161 cqr->memdev = device;
5162 cqr->block = NULL;
5163 cqr->retries = 256;
5164 cqr->expires = 10 * HZ;
5165
5166 /* Prepare for Read Subsystem Data */
5167 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
5168 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
5169 prssdp->order = PSF_ORDER_PRSSD;
5170 prssdp->suborder = PSF_SUBORDER_QHA; /* query host access */
5171 /* LSS and Volume that will be queried */
5172 prssdp->lss = private->ned->ID;
5173 prssdp->volume = private->ned->unit_addr;
5174 /* all other bytes of prssdp must be zero */
5175
5176 ccw = cqr->cpaddr;
5177 ccw->cmd_code = DASD_ECKD_CCW_PSF;
5178 ccw->count = sizeof(struct dasd_psf_prssd_data);
5179 ccw->flags |= CCW_FLAG_CC;
5180 ccw->flags |= CCW_FLAG_SLI;
5181 ccw->cda = (__u32)(addr_t) prssdp;
5182
5183 /* Read Subsystem Data - query host access */
5184 ccw++;
5185 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
5186 ccw->count = sizeof(struct dasd_psf_query_host_access);
5187 ccw->flags |= CCW_FLAG_SLI;
5188 ccw->cda = (__u32)(addr_t) host_access;
5189
5190 cqr->buildclk = get_tod_clock();
5191 cqr->status = DASD_CQR_FILLED;
ab24fbd3
SH		 5192 /* the command might not be supported, suppress error message */
5193 __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags);
f50af850 5194 rc = dasd_sleep_on_interruptible(cqr);
5a3b7b11
SH		 5195 if (rc == 0) {
5196 *data = *host_access;
5197 } else {
5198 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
5199 "Reading host access data failed with rc=%d\n",
5200 rc);
5201 rc = -EOPNOTSUPP;
5202 }
5203
5204 dasd_sfree_request(cqr, cqr->memdev);
5205 kfree(host_access);
5206 return rc;
5207}
5208/*
5209 * return number of grouped devices
5210 */
5211static int dasd_eckd_host_access_count(struct dasd_device *device)
5212{
5213 struct dasd_psf_query_host_access *access;
5214 struct dasd_ckd_path_group_entry *entry;
5215 struct dasd_ckd_host_information *info;
5216 int count = 0;
5217 int rc, i;
5218
5219 access = kzalloc(sizeof(*access), GFP_NOIO);
5220 if (!access) {
5221 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
5222 "Could not allocate access buffer");
5223 return -ENOMEM;
5224 }
5225 rc = dasd_eckd_query_host_access(device, access);
5226 if (rc) {
5227 kfree(access);
5228 return rc;
5229 }
5230
5231 info = (struct dasd_ckd_host_information *)
5232 access->host_access_information;
5233 for (i = 0; i < info->entry_count; i++) {
5234 entry = (struct dasd_ckd_path_group_entry *)
5235 (info->entry + i * info->entry_size);
5236 if (entry->status_flags & DASD_ECKD_PG_GROUPED)
5237 count++;
5238 }
5239
5240 kfree(access);
5241 return count;
5242}
5243
5244/*
5245 * write host access information to a sequential file
5246 */
5247static int dasd_hosts_print(struct dasd_device *device, struct seq_file *m)
5248{
5249 struct dasd_psf_query_host_access *access;
5250 struct dasd_ckd_path_group_entry *entry;
5251 struct dasd_ckd_host_information *info;
5252 char sysplex[9] = "";
c7848e14 5253 int rc, i;
5a3b7b11
SH		 5254
5255 access = kzalloc(sizeof(*access), GFP_NOIO);
5256 if (!access) {
5257 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
5258 "Could not allocate access buffer");
5259 return -ENOMEM;
5260 }
5261 rc = dasd_eckd_query_host_access(device, access);
5262 if (rc) {
5263 kfree(access);
5264 return rc;
5265 }
5266
5267 info = (struct dasd_ckd_host_information *)
5268 access->host_access_information;
5269 for (i = 0; i < info->entry_count; i++) {
5270 entry = (struct dasd_ckd_path_group_entry *)
5271 (info->entry + i * info->entry_size);
5272 /* PGID */
c7848e14 5273 seq_printf(m, "pgid %*phN\n", 11, entry->pgid);
5a3b7b11
SH		 5274 /* FLAGS */
5275 seq_printf(m, "status_flags %02x\n", entry->status_flags);
5276 /* SYSPLEX NAME */
5277 memcpy(&sysplex, &entry->sysplex_name, sizeof(sysplex) - 1);
5278 EBCASC(sysplex, sizeof(sysplex));
5279 seq_printf(m, "sysplex_name %8s\n", sysplex);
5280 /* SUPPORTED CYLINDER */
5281 seq_printf(m, "supported_cylinder %d\n", entry->cylinder);
5282 /* TIMESTAMP */
5283 seq_printf(m, "timestamp %lu\n", (unsigned long)
5284 entry->timestamp);
5285 }
5286 kfree(access);
5287
5288 return 0;
5289}
5290
5db8440c
SH		 5291/*
5292 * Perform Subsystem Function - CUIR response
5293 */
5294static int
5295dasd_eckd_psf_cuir_response(struct dasd_device *device, int response,
a521b048 5296 __u32 message_id, __u8 lpum)
5db8440c
SH		 5297{
5298 struct dasd_psf_cuir_response *psf_cuir;
a521b048 5299 int pos = pathmask_to_pos(lpum);
5db8440c
SH		 5300 struct dasd_ccw_req *cqr;
5301 struct ccw1 *ccw;
5302 int rc;
5303
5304 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ ,
c5205f2f
SO		 5305 sizeof(struct dasd_psf_cuir_response),
5306 device, NULL);
5db8440c
SH		 5307
5308 if (IS_ERR(cqr)) {
5309 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
5310 "Could not allocate PSF-CUIR request");
5311 return PTR_ERR(cqr);
5312 }
5313
5314 psf_cuir = (struct dasd_psf_cuir_response *)cqr->data;
5315 psf_cuir->order = PSF_ORDER_CUIR_RESPONSE;
5316 psf_cuir->cc = response;
a521b048 5317 psf_cuir->chpid = device->path[pos].chpid;
5db8440c 5318 psf_cuir->message_id = message_id;
a521b048
SH		 5319 psf_cuir->cssid = device->path[pos].cssid;
5320 psf_cuir->ssid = device->path[pos].ssid;
5db8440c
SH		 5321 ccw = cqr->cpaddr;
5322 ccw->cmd_code = DASD_ECKD_CCW_PSF;
5323 ccw->cda = (__u32)(addr_t)psf_cuir;
b179b037 5324 ccw->flags = CCW_FLAG_SLI;
5db8440c
SH		 5325 ccw->count = sizeof(struct dasd_psf_cuir_response);
5326
5327 cqr->startdev = device;
5328 cqr->memdev = device;
5329 cqr->block = NULL;
5330 cqr->retries = 256;
5331 cqr->expires = 10*HZ;
5332 cqr->buildclk = get_tod_clock();
5333 cqr->status = DASD_CQR_FILLED;
b179b037 5334 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags);
5db8440c
SH		 5335
5336 rc = dasd_sleep_on(cqr);
5337
5338 dasd_sfree_request(cqr, cqr->memdev);
5339 return rc;
5340}
5341
b179b037
SH		 5342/*
5343 * return configuration data that is referenced by record selector
5344 * if a record selector is specified or per default return the
5345 * conf_data pointer for the path specified by lpum
5346 */
5347static struct dasd_conf_data *dasd_eckd_get_ref_conf(struct dasd_device *device,
5348 __u8 lpum,
5349 struct dasd_cuir_message *cuir)
5db8440c 5350{
b179b037
SH		 5351 struct dasd_conf_data *conf_data;
5352 int path, pos;
5db8440c 5353
b179b037
SH		 5354 if (cuir->record_selector == 0)
5355 goto out;
5356 for (path = 0x80, pos = 0; path; path >>= 1, pos++) {
c9346151 5357 conf_data = device->path[pos].conf_data;
b179b037
SH		 5358 if (conf_data->gneq.record_selector ==
5359 cuir->record_selector)
5360 return conf_data;
5db8440c 5361 }
b179b037 5362out:
c9346151 5363 return device->path[pathmask_to_pos(lpum)].conf_data;
5db8440c
SH		 5364}
5365
5366/*
b179b037
SH		 5367 * This function determines the scope of a reconfiguration request by
5368 * analysing the path and device selection data provided in the CUIR request.
5369 * Returns a path mask containing CUIR affected paths for the give device.
5370 *
5371 * If the CUIR request does not contain the required information return the
5372 * path mask of the path the attention message for the CUIR request was reveived
5373 * on.
5374 */
5375static int dasd_eckd_cuir_scope(struct dasd_device *device, __u8 lpum,
5376 struct dasd_cuir_message *cuir)
5377{
5378 struct dasd_conf_data *ref_conf_data;
5379 unsigned long bitmask = 0, mask = 0;
b179b037
SH		 5380 struct dasd_conf_data *conf_data;
5381 unsigned int pos, path;
5382 char *ref_gneq, *gneq;
5383 char *ref_ned, *ned;
5384 int tbcpm = 0;
5385
5386 /* if CUIR request does not specify the scope use the path
5387 the attention message was presented on */
5388 if (!cuir->ned_map ||
5389 !(cuir->neq_map[0] | cuir->neq_map[1] | cuir->neq_map[2]))
5390 return lpum;
5391
b179b037
SH		 5392 /* get reference conf data */
5393 ref_conf_data = dasd_eckd_get_ref_conf(device, lpum, cuir);
5394 /* reference ned is determined by ned_map field */
5395 pos = 8 - ffs(cuir->ned_map);
5396 ref_ned = (char *)&ref_conf_data->neds[pos];
5397 ref_gneq = (char *)&ref_conf_data->gneq;
5398 /* transfer 24 bit neq_map to mask */
5399 mask = cuir->neq_map[2];
5400 mask |= cuir->neq_map[1] << 8;
5401 mask |= cuir->neq_map[0] << 16;
5402
c9346151 5403 for (path = 0; path < 8; path++) {
b179b037
SH		 5404 /* initialise data per path */
5405 bitmask = mask;
c9346151 5406 conf_data = device->path[path].conf_data;
b179b037
SH		 5407 pos = 8 - ffs(cuir->ned_map);
5408 ned = (char *) &conf_data->neds[pos];
5409 /* compare reference ned and per path ned */
5410 if (memcmp(ref_ned, ned, sizeof(*ned)) != 0)
5411 continue;
5412 gneq = (char *)&conf_data->gneq;
5413 /* compare reference gneq and per_path gneq under
5414 24 bit mask where mask bit 0 equals byte 7 of
5415 the gneq and mask bit 24 equals byte 31 */
5416 while (bitmask) {
5417 pos = ffs(bitmask) - 1;
5418 if (memcmp(&ref_gneq[31 - pos], &gneq[31 - pos], 1)
5419 != 0)
5420 break;
5421 clear_bit(pos, &bitmask);
5422 }
5423 if (bitmask)
5424 continue;
5425 /* device and path match the reference values
5426 add path to CUIR scope */
c9346151 5427 tbcpm |= 0x80 >> path;
b179b037
SH		 5428 }
5429 return tbcpm;
5430}
5431
5432static void dasd_eckd_cuir_notify_user(struct dasd_device *device,
a521b048 5433 unsigned long paths, int action)
b179b037 5434{
b179b037
SH		 5435 int pos;
5436
5437 while (paths) {
5438 /* get position of bit in mask */
a521b048 5439 pos = 8 - ffs(paths);
b179b037 5440 /* get channel path descriptor from this position */
b179b037 5441 if (action == CUIR_QUIESCE)
a521b048
SH		 5442 pr_warn("Service on the storage server caused path %x.%02x to go offline",
5443 device->path[pos].cssid,
5444 device->path[pos].chpid);
b179b037 5445 else if (action == CUIR_RESUME)
a521b048
SH		 5446 pr_info("Path %x.%02x is back online after service on the storage server",
5447 device->path[pos].cssid,
5448 device->path[pos].chpid);
5449 clear_bit(7 - pos, &paths);
b179b037
SH		 5450 }
5451}
5452
5453static int dasd_eckd_cuir_remove_path(struct dasd_device *device, __u8 lpum,
5454 struct dasd_cuir_message *cuir)
5455{
5456 unsigned long tbcpm;
5457
5458 tbcpm = dasd_eckd_cuir_scope(device, lpum, cuir);
5459 /* nothing to do if path is not in use */
c9346151 5460 if (!(dasd_path_get_opm(device) & tbcpm))
b179b037 5461 return 0;
c9346151 5462 if (!(dasd_path_get_opm(device) & ~tbcpm)) {
b179b037
SH		 5463 /* no path would be left if the CUIR action is taken
5464 return error */
5465 return -EINVAL;
5466 }
5467 /* remove device from operational path mask */
c9346151
SH		 5468 dasd_path_remove_opm(device, tbcpm);
5469 dasd_path_add_cuirpm(device, tbcpm);
b179b037
SH		 5470 return tbcpm;
5471}
5472
5473/*
5474 * walk through all devices and build a path mask to quiesce them
5475 * return an error if the last path to a device would be removed
5db8440c
SH		 5476 *
5477 * if only part of the devices are quiesced and an error
5478 * occurs no onlining necessary, the storage server will
5479 * notify the already set offline devices again
5480 */
5481static int dasd_eckd_cuir_quiesce(struct dasd_device *device, __u8 lpum,
b179b037 5482 struct dasd_cuir_message *cuir)
5db8440c 5483{
543691a4 5484 struct dasd_eckd_private *private = device->private;
5db8440c 5485 struct alias_pav_group *pavgroup, *tempgroup;
5db8440c 5486 struct dasd_device *dev, *n;
b179b037
SH		 5487 unsigned long paths = 0;
5488 unsigned long flags;
5489 int tbcpm;
5db8440c 5490
5db8440c 5491 /* active devices */
b179b037 5492 list_for_each_entry_safe(dev, n, &private->lcu->active_devices,
5db8440c 5493 alias_list) {
b179b037
SH		 5494 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
5495 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
5496 spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags);
5497 if (tbcpm < 0)
5498 goto out_err;
5499 paths |= tbcpm;
5db8440c 5500 }
5db8440c 5501 /* inactive devices */
b179b037 5502 list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices,
5db8440c 5503 alias_list) {
b179b037
SH		 5504 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
5505 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
5506 spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags);
5507 if (tbcpm < 0)
5508 goto out_err;
5509 paths |= tbcpm;
5db8440c 5510 }
5db8440c
SH		 5511 /* devices in PAV groups */
5512 list_for_each_entry_safe(pavgroup, tempgroup,
5513 &private->lcu->grouplist, group) {
5514 list_for_each_entry_safe(dev, n, &pavgroup->baselist,
5515 alias_list) {
b179b037
SH		 5516 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
5517 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
5518 spin_unlock_irqrestore(
5519 get_ccwdev_lock(dev->cdev), flags);
5520 if (tbcpm < 0)
5521 goto out_err;
5522 paths |= tbcpm;
5db8440c
SH		 5523 }
5524 list_for_each_entry_safe(dev, n, &pavgroup->aliaslist,
5525 alias_list) {
b179b037
SH		 5526 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
5527 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
5528 spin_unlock_irqrestore(
5529 get_ccwdev_lock(dev->cdev), flags);
5530 if (tbcpm < 0)
5531 goto out_err;
5532 paths |= tbcpm;
5db8440c
SH		 5533 }
5534 }
b179b037 5535 /* notify user about all paths affected by CUIR action */
a521b048 5536 dasd_eckd_cuir_notify_user(device, paths, CUIR_QUIESCE);
b179b037
SH		 5537 return 0;
5538out_err:
5539 return tbcpm;
5db8440c
SH		 5540}
5541
5542static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum,
b179b037 5543 struct dasd_cuir_message *cuir)
5db8440c 5544{
543691a4 5545 struct dasd_eckd_private *private = device->private;
5db8440c 5546 struct alias_pav_group *pavgroup, *tempgroup;
5db8440c 5547 struct dasd_device *dev, *n;
b179b037
SH		 5548 unsigned long paths = 0;
5549 int tbcpm;
5db8440c 5550
5db8440c
SH		 5551 /*
5552 * the path may have been added through a generic path event before
5553 * only trigger path verification if the path is not already in use
5554 */
5db8440c
SH		 5555 list_for_each_entry_safe(dev, n,
5556 &private->lcu->active_devices,
5557 alias_list) {
b179b037
SH		 5558 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
5559 paths |= tbcpm;
c9346151
SH		 5560 if (!(dasd_path_get_opm(dev) & tbcpm)) {
5561 dasd_path_add_tbvpm(dev, tbcpm);
5db8440c
SH		 5562 dasd_schedule_device_bh(dev);
5563 }
5564 }
5db8440c
SH		 5565 list_for_each_entry_safe(dev, n,
5566 &private->lcu->inactive_devices,
5567 alias_list) {
b179b037
SH		 5568 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
5569 paths |= tbcpm;
c9346151
SH		 5570 if (!(dasd_path_get_opm(dev) & tbcpm)) {
5571 dasd_path_add_tbvpm(dev, tbcpm);
5db8440c
SH		 5572 dasd_schedule_device_bh(dev);
5573 }
5574 }
5db8440c
SH		 5575 /* devices in PAV groups */
5576 list_for_each_entry_safe(pavgroup, tempgroup,
5577 &private->lcu->grouplist,
5578 group) {
5579 list_for_each_entry_safe(dev, n,
5580 &pavgroup->baselist,
5581 alias_list) {
b179b037
SH		 5582 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
5583 paths |= tbcpm;
c9346151
SH		 5584 if (!(dasd_path_get_opm(dev) & tbcpm)) {
5585 dasd_path_add_tbvpm(dev, tbcpm);
5db8440c
SH		 5586 dasd_schedule_device_bh(dev);
5587 }
5588 }
5589 list_for_each_entry_safe(dev, n,
5590 &pavgroup->aliaslist,
5591 alias_list) {
b179b037
SH		 5592 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
5593 paths |= tbcpm;
c9346151
SH		 5594 if (!(dasd_path_get_opm(dev) & tbcpm)) {
5595 dasd_path_add_tbvpm(dev, tbcpm);
5db8440c
SH		 5596 dasd_schedule_device_bh(dev);
5597 }
5598 }
5599 }
b179b037 5600 /* notify user about all paths affected by CUIR action */
a521b048 5601 dasd_eckd_cuir_notify_user(device, paths, CUIR_RESUME);
b179b037 5602 return 0;
5db8440c
SH		 5603}
5604
5605static void dasd_eckd_handle_cuir(struct dasd_device *device, void *messages,
5606 __u8 lpum)
5607{
5608 struct dasd_cuir_message *cuir = messages;
a521b048 5609 int response;
5db8440c 5610
b179b037
SH		 5611 DBF_DEV_EVENT(DBF_WARNING, device,
5612 "CUIR request: %016llx %016llx %016llx %08x",
5613 ((u64 *)cuir)[0], ((u64 *)cuir)[1], ((u64 *)cuir)[2],
5614 ((u32 *)cuir)[3]);
5db8440c
SH		 5615
5616 if (cuir->code == CUIR_QUIESCE) {
5617 /* quiesce */
a521b048 5618 if (dasd_eckd_cuir_quiesce(device, lpum, cuir))
b179b037
SH		 5619 response = PSF_CUIR_LAST_PATH;
5620 else
5621 response = PSF_CUIR_COMPLETED;
5db8440c
SH		 5622 } else if (cuir->code == CUIR_RESUME) {
5623 /* resume */
a521b048 5624 dasd_eckd_cuir_resume(device, lpum, cuir);
b179b037 5625 response = PSF_CUIR_COMPLETED;
5db8440c
SH		 5626 } else
5627 response = PSF_CUIR_NOT_SUPPORTED;
5628
b179b037 5629 dasd_eckd_psf_cuir_response(device, response,
a521b048 5630 cuir->message_id, lpum);
b179b037
SH		 5631 DBF_DEV_EVENT(DBF_WARNING, device,
5632 "CUIR response: %d on message ID %08x", response,
5633 cuir->message_id);
b179b037
SH		 5634 /* to make sure there is no attention left schedule work again */
5635 device->discipline->check_attention(device, lpum);
5db8440c
SH		 5636}
5637
5638static void dasd_eckd_check_attention_work(struct work_struct *work)
5639{
5640 struct check_attention_work_data *data;
5641 struct dasd_rssd_messages *messages;
5642 struct dasd_device *device;
5643 int rc;
5644
5645 data = container_of(work, struct check_attention_work_data, worker);
5646 device = data->device;
5db8440c
SH		 5647 messages = kzalloc(sizeof(*messages), GFP_KERNEL);
5648 if (!messages) {
5649 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
5650 "Could not allocate attention message buffer");
5651 goto out;
5652 }
5db8440c
SH		 5653 rc = dasd_eckd_read_message_buffer(device, messages, data->lpum);
5654 if (rc)
5655 goto out;
5db8440c
SH		 5656 if (messages->length == ATTENTION_LENGTH_CUIR &&
5657 messages->format == ATTENTION_FORMAT_CUIR)
5658 dasd_eckd_handle_cuir(device, messages, data->lpum);
5db8440c
SH		 5659out:
5660 dasd_put_device(device);
5661 kfree(messages);
5662 kfree(data);
5663}
5664
5665static int dasd_eckd_check_attention(struct dasd_device *device, __u8 lpum)
5666{
5667 struct check_attention_work_data *data;
5668
5669 data = kzalloc(sizeof(*data), GFP_ATOMIC);
5670 if (!data)
5671 return -ENOMEM;
5672 INIT_WORK(&data->worker, dasd_eckd_check_attention_work);
5673 dasd_get_device(device);
5674 data->device = device;
5675 data->lpum = lpum;
5676 schedule_work(&data->worker);
5677 return 0;
5678}
5679
a521b048
SH		 5680static int dasd_eckd_disable_hpf_path(struct dasd_device *device, __u8 lpum)
5681{
5682 if (~lpum & dasd_path_get_opm(device)) {
5683 dasd_path_add_nohpfpm(device, lpum);
5684 dasd_path_remove_opm(device, lpum);
5685 dev_err(&device->cdev->dev,
5686 "Channel path %02X lost HPF functionality and is disabled\n",
5687 lpum);
5688 return 1;
5689 }
5690 return 0;
5691}
5692
5693static void dasd_eckd_disable_hpf_device(struct dasd_device *device)
5694{
5695 struct dasd_eckd_private *private = device->private;
5696
5697 dev_err(&device->cdev->dev,
5698 "High Performance FICON disabled\n");
5699 private->fcx_max_data = 0;
5700}
5701
5702static int dasd_eckd_hpf_enabled(struct dasd_device *device)
5703{
5704 struct dasd_eckd_private *private = device->private;
5705
5706 return private->fcx_max_data ? 1 : 0;
5707}
5708
5709static void dasd_eckd_handle_hpf_error(struct dasd_device *device,
5710 struct irb *irb)
5711{
5712 struct dasd_eckd_private *private = device->private;
5713
5714 if (!private->fcx_max_data) {
5715 /* sanity check for no HPF, the error makes no sense */
5716 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
5717 "Trying to disable HPF for a non HPF device");
5718 return;
5719 }
5720 if (irb->scsw.tm.sesq == SCSW_SESQ_DEV_NOFCX) {
5721 dasd_eckd_disable_hpf_device(device);
5722 } else if (irb->scsw.tm.sesq == SCSW_SESQ_PATH_NOFCX) {
5723 if (dasd_eckd_disable_hpf_path(device, irb->esw.esw1.lpum))
5724 return;
5725 dasd_eckd_disable_hpf_device(device);
5726 dasd_path_set_tbvpm(device,
5727 dasd_path_get_hpfpm(device));
5728 }
5729 /*
5730 * prevent that any new I/O ist started on the device and schedule a
5731 * requeue of existing requests
5732 */
5733 dasd_device_set_stop_bits(device, DASD_STOPPED_NOT_ACC);
5734 dasd_schedule_requeue(device);
5735}
5736
d41dd122 5737static struct ccw_driver dasd_eckd_driver = {
3bda058b
SO		 5738 .driver = {
5739 .name = "dasd-eckd",
5740 .owner = THIS_MODULE,
5741 },
d41dd122
SH		 5742 .ids = dasd_eckd_ids,
5743 .probe = dasd_eckd_probe,
5744 .remove = dasd_generic_remove,
5745 .set_offline = dasd_generic_set_offline,
5746 .set_online = dasd_eckd_set_online,
5747 .notify = dasd_generic_notify,
a4d26c6a 5748 .path_event = dasd_generic_path_event,
4679e893 5749 .shutdown = dasd_generic_shutdown,
d41dd122
SH		 5750 .freeze = dasd_generic_pm_freeze,
5751 .thaw = dasd_generic_restore_device,
5752 .restore = dasd_generic_restore_device,
a23ed009 5753 .uc_handler = dasd_generic_uc_handler,
420f42ec 5754 .int_class = IRQIO_DAS,
d41dd122 5755};
f3eb5384 5756
1da177e4
LT		 5757/*
5758 * max_blocks is dependent on the amount of storage that is available
5759 * in the static io buffer for each device. Currently each device has
5760 * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has
5761 * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use
5762 * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In
5763 * addition we have one define extent ccw + 16 bytes of data and one
5764 * locate record ccw + 16 bytes of data. That makes:
5765 * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum.
5766 * We want to fit two into the available memory so that we can immediately
5767 * start the next request if one finishes off. That makes 249.5 blocks
5768 * for one request. Give a little safety and the result is 240.
5769 */
5770static struct dasd_discipline dasd_eckd_discipline = {
5771 .owner = THIS_MODULE,
5772 .name = "ECKD",
5773 .ebcname = "ECKD",
ef19298b 5774 .max_blocks = 190,
1da177e4 5775 .check_device = dasd_eckd_check_characteristics,
8e09f215 5776 .uncheck_device = dasd_eckd_uncheck_device,
1da177e4 5777 .do_analysis = dasd_eckd_do_analysis,
a4d26c6a 5778 .verify_path = dasd_eckd_verify_path,
d42e1712 5779 .basic_to_ready = dasd_eckd_basic_to_ready,
8e09f215 5780 .online_to_ready = dasd_eckd_online_to_ready,
daa991bf 5781 .basic_to_known = dasd_eckd_basic_to_known,
1da177e4
LT		 5782 .fill_geometry = dasd_eckd_fill_geometry,
5783 .start_IO = dasd_start_IO,
5784 .term_IO = dasd_term_IO,
8e09f215 5785 .handle_terminated_request = dasd_eckd_handle_terminated_request,
1da177e4 5786 .format_device = dasd_eckd_format_device,
8fd57520 5787 .check_device_format = dasd_eckd_check_device_format,
1da177e4
LT		 5788 .erp_action = dasd_eckd_erp_action,
5789 .erp_postaction = dasd_eckd_erp_postaction,
5a27e60d 5790 .check_for_device_change = dasd_eckd_check_for_device_change,
8e09f215
SW		 5791 .build_cp = dasd_eckd_build_alias_cp,
5792 .free_cp = dasd_eckd_free_alias_cp,
1da177e4 5793 .dump_sense = dasd_eckd_dump_sense,
fc19f381 5794 .dump_sense_dbf = dasd_eckd_dump_sense_dbf,
1da177e4 5795 .fill_info = dasd_eckd_fill_info,
1107ccfb 5796 .ioctl = dasd_eckd_ioctl,
d41dd122
SH		 5797 .freeze = dasd_eckd_pm_freeze,
5798 .restore = dasd_eckd_restore_device,
501183f2 5799 .reload = dasd_eckd_reload_device,
2dedf0d9 5800 .get_uid = dasd_eckd_get_uid,
f1633031 5801 .kick_validate = dasd_eckd_kick_validate_server,
5db8440c 5802 .check_attention = dasd_eckd_check_attention,
5a3b7b11
SH		 5803 .host_access_count = dasd_eckd_host_access_count,
5804 .hosts_print = dasd_hosts_print,
a521b048
SH		 5805 .handle_hpf_error = dasd_eckd_handle_hpf_error,
5806 .disable_hpf = dasd_eckd_disable_hpf_device,
5807 .hpf_enabled = dasd_eckd_hpf_enabled,
5808 .reset_path = dasd_eckd_reset_path,
1da177e4
LT		 5809};
5810
5811static int __init
5812dasd_eckd_init(void)
5813{
736e6ea0
SO		 5814 int ret;
5815
1da177e4 5816 ASCEBC(dasd_eckd_discipline.ebcname, 4);
f932bcea
SW		 5817 dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req),
5818 GFP_KERNEL | GFP_DMA);
5819 if (!dasd_reserve_req)
5820 return -ENOMEM;
a4d26c6a
SW		 5821 path_verification_worker = kmalloc(sizeof(*path_verification_worker),
5822 GFP_KERNEL | GFP_DMA);
5823 if (!path_verification_worker) {
5824 kfree(dasd_reserve_req);
5825 return -ENOMEM;
5826 }
558b9ef0
SW		 5827 rawpadpage = (void *)__get_free_page(GFP_KERNEL);
5828 if (!rawpadpage) {
5829 kfree(path_verification_worker);
5830 kfree(dasd_reserve_req);
5831 return -ENOMEM;
5832 }
736e6ea0
SO		 5833 ret = ccw_driver_register(&dasd_eckd_driver);
5834 if (!ret)
5835 wait_for_device_probe();
a4d26c6a
SW		 5836 else {
5837 kfree(path_verification_worker);
f932bcea 5838 kfree(dasd_reserve_req);
558b9ef0 5839 free_page((unsigned long)rawpadpage);
a4d26c6a 5840 }
736e6ea0 5841 return ret;
1da177e4
LT		 5842}
5843
5844static void __exit
5845dasd_eckd_cleanup(void)
5846{
5847 ccw_driver_unregister(&dasd_eckd_driver);
a4d26c6a 5848 kfree(path_verification_worker);
f932bcea 5849 kfree(dasd_reserve_req);
558b9ef0 5850 free_page((unsigned long)rawpadpage);
1da177e4
LT		 5851}
5852
5853module_init(dasd_eckd_init);
5854module_exit(dasd_eckd_cleanup);
Linux 6.x block layer and io_uring tree(s)