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Revert "s390/dasd: Add discard support for ESE volumes"
[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
e4dbb0f2
SH		 45/*
46 * raw track access always map to 64k in memory
47 * so it maps to 16 blocks of 4k per track
48 */
49#define DASD_RAW_BLOCK_PER_TRACK 16
50#define DASD_RAW_BLOCKSIZE 4096
51/* 64k are 128 x 512 byte sectors */
52#define DASD_RAW_SECTORS_PER_TRACK 128
53
1da177e4
LT		 54MODULE_LICENSE("GPL");
55
56static struct dasd_discipline dasd_eckd_discipline;
57
1da177e4
LT		 58/* The ccw bus type uses this table to find devices that it sends to
59 * dasd_eckd_probe */
60static struct ccw_device_id dasd_eckd_ids[] = {
d2c993d8
HC		 61 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1},
62 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2},
5da24b76 63 { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3380, 0), .driver_info = 0x3},
d2c993d8
HC		 64 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4},
65 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5},
66 { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6},
67 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7},
68 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8},
69 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9},
70 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa},
1da177e4
LT		 71 { /* end of list */ },
72};
73
74MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids);
75
76static struct ccw_driver dasd_eckd_driver; /* see below */
77
558b9ef0
SW		 78static void *rawpadpage;
79
eb6e199b
SW		 80#define INIT_CQR_OK 0
81#define INIT_CQR_UNFORMATTED 1
82#define INIT_CQR_ERROR 2
83
f932bcea
SW		 84/* emergency request for reserve/release */
85static struct {
86 struct dasd_ccw_req cqr;
87 struct ccw1 ccw;
88 char data[32];
89} *dasd_reserve_req;
90static DEFINE_MUTEX(dasd_reserve_mutex);
91
9e12e54c
JH		 92static struct {
93 struct dasd_ccw_req cqr;
94 struct ccw1 ccw[2];
95 char data[40];
96} *dasd_vol_info_req;
97static DEFINE_MUTEX(dasd_vol_info_mutex);
98
99struct ext_pool_exhaust_work_data {
100 struct work_struct worker;
101 struct dasd_device *device;
102 struct dasd_device *base;
103};
104
a4d26c6a
SW		 105/* definitions for the path verification worker */
106struct path_verification_work_data {
107 struct work_struct worker;
108 struct dasd_device *device;
109 struct dasd_ccw_req cqr;
110 struct ccw1 ccw;
111 __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE];
112 int isglobal;
113 __u8 tbvpm;
114};
115static struct path_verification_work_data *path_verification_worker;
116static DEFINE_MUTEX(dasd_path_verification_mutex);
eb6e199b 117
5db8440c
SH		 118struct check_attention_work_data {
119 struct work_struct worker;
120 struct dasd_device *device;
121 __u8 lpum;
122};
123
c729696b 124static int dasd_eckd_ext_pool_id(struct dasd_device *);
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 159/* head and record addresses of count_area read in analysis ccw */
ce6915f5 160static const int count_area_head[] = { 0, 0, 0, 0, 1 };
3bc9fef9
SH		 161static const int count_area_rec[] = { 1, 2, 3, 4, 1 };
162
1da177e4
LT		 163static inline unsigned int
164ceil_quot(unsigned int d1, unsigned int d2)
165{
166 return (d1 + (d2 - 1)) / d2;
167}
168
4d284cac 169static unsigned int
1da177e4
LT		 170recs_per_track(struct dasd_eckd_characteristics * rdc,
171 unsigned int kl, unsigned int dl)
172{
173 int dn, kn;
174
175 switch (rdc->dev_type) {
176 case 0x3380:
177 if (kl)
178 return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) +
179 ceil_quot(dl + 12, 32));
180 else
181 return 1499 / (15 + ceil_quot(dl + 12, 32));
182 case 0x3390:
183 dn = ceil_quot(dl + 6, 232) + 1;
184 if (kl) {
185 kn = ceil_quot(kl + 6, 232) + 1;
186 return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) +
187 9 + ceil_quot(dl + 6 * dn, 34));
188 } else
189 return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34));
190 case 0x9345:
191 dn = ceil_quot(dl + 6, 232) + 1;
192 if (kl) {
193 kn = ceil_quot(kl + 6, 232) + 1;
194 return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) +
195 ceil_quot(dl + 6 * dn, 34));
196 } else
197 return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34));
198 }
199 return 0;
200}
201
b44b0ab3
SW		 202static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head)
203{
204 geo->cyl = (__u16) cyl;
205 geo->head = cyl >> 16;
206 geo->head <<= 4;
207 geo->head |= head;
208}
209
5628683c 210static int set_timestamp(struct ccw1 *ccw, struct DE_eckd_data *data,
45f186be 211 struct dasd_device *device)
1da177e4 212{
543691a4 213 struct dasd_eckd_private *private = device->private;
d54853ef 214 int rc;
1da177e4 215
5628683c
SH		 216 rc = get_phys_clock(&data->ep_sys_time);
217 /*
218 * Ignore return code if XRC is not supported or
219 * sync clock is switched off
220 */
221 if ((rc && !private->rdc_data.facilities.XRC_supported) ||
222 rc == -EOPNOTSUPP || rc == -EACCES)
d54853ef 223 return 0;
1da177e4 224
45f186be 225 /* switch on System Time Stamp - needed for XRC Support */
d54853ef
MS		 226 data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */
227 data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */
1da177e4 228
45f186be
JH		 229 if (ccw) {
230 ccw->count = sizeof(struct DE_eckd_data);
231 ccw->flags |= CCW_FLAG_SLI;
232 }
233
d54853ef
MS		 234 return rc;
235}
1da177e4 236
4d284cac 237static int
b44b0ab3 238define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk,
45f186be
JH		 239 unsigned int totrk, int cmd, struct dasd_device *device,
240 int blksize)
1da177e4 241{
543691a4 242 struct dasd_eckd_private *private = device->private;
b44b0ab3 243 u16 heads, beghead, endhead;
45f186be 244 u32 begcyl, endcyl;
d54853ef 245 int rc = 0;
1da177e4 246
45f186be
JH		 247 if (ccw) {
248 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT;
249 ccw->flags = 0;
250 ccw->count = 16;
251 ccw->cda = (__u32)__pa(data);
252 }
1da177e4 253
8e09f215 254 memset(data, 0, sizeof(struct DE_eckd_data));
1da177e4
LT		 255 switch (cmd) {
256 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
257 case DASD_ECKD_CCW_READ_RECORD_ZERO:
258 case DASD_ECKD_CCW_READ:
259 case DASD_ECKD_CCW_READ_MT:
260 case DASD_ECKD_CCW_READ_CKD:
261 case DASD_ECKD_CCW_READ_CKD_MT:
262 case DASD_ECKD_CCW_READ_KD:
263 case DASD_ECKD_CCW_READ_KD_MT:
1da177e4
LT		 264 data->mask.perm = 0x1;
265 data->attributes.operation = private->attrib.operation;
266 break;
8fd57520
JH		 267 case DASD_ECKD_CCW_READ_COUNT:
268 data->mask.perm = 0x1;
269 data->attributes.operation = DASD_BYPASS_CACHE;
270 break;
45f186be
JH		 271 case DASD_ECKD_CCW_READ_TRACK:
272 case DASD_ECKD_CCW_READ_TRACK_DATA:
273 data->mask.perm = 0x1;
274 data->attributes.operation = private->attrib.operation;
275 data->blk_size = 0;
276 break;
1da177e4
LT		 277 case DASD_ECKD_CCW_WRITE:
278 case DASD_ECKD_CCW_WRITE_MT:
279 case DASD_ECKD_CCW_WRITE_KD:
280 case DASD_ECKD_CCW_WRITE_KD_MT:
281 data->mask.perm = 0x02;
282 data->attributes.operation = private->attrib.operation;
5628683c 283 rc = set_timestamp(ccw, data, device);
1da177e4
LT		 284 break;
285 case DASD_ECKD_CCW_WRITE_CKD:
286 case DASD_ECKD_CCW_WRITE_CKD_MT:
287 data->attributes.operation = DASD_BYPASS_CACHE;
5628683c 288 rc = set_timestamp(ccw, data, device);
1da177e4
LT		 289 break;
290 case DASD_ECKD_CCW_ERASE:
291 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
292 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
293 data->mask.perm = 0x3;
294 data->mask.auth = 0x1;
295 data->attributes.operation = DASD_BYPASS_CACHE;
5628683c 296 rc = set_timestamp(ccw, data, device);
45f186be
JH		 297 break;
298 case DASD_ECKD_CCW_WRITE_FULL_TRACK:
299 data->mask.perm = 0x03;
300 data->attributes.operation = private->attrib.operation;
301 data->blk_size = 0;
302 break;
303 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
304 data->mask.perm = 0x02;
305 data->attributes.operation = private->attrib.operation;
306 data->blk_size = blksize;
5628683c 307 rc = set_timestamp(ccw, data, device);
1da177e4
LT		 308 break;
309 default:
fc19f381
SH		 310 dev_err(&device->cdev->dev,
311 "0x%x is not a known command\n", cmd);
1da177e4
LT		 312 break;
313 }
314
315 data->attributes.mode = 0x3; /* ECKD */
316
317 if ((private->rdc_data.cu_type == 0x2105 ||
318 private->rdc_data.cu_type == 0x2107 ||
319 private->rdc_data.cu_type == 0x1750)
320 && !(private->uses_cdl && trk < 2))
321 data->ga_extended |= 0x40; /* Regular Data Format Mode */
322
b44b0ab3
SW		 323 heads = private->rdc_data.trk_per_cyl;
324 begcyl = trk / heads;
325 beghead = trk % heads;
326 endcyl = totrk / heads;
327 endhead = totrk % heads;
1da177e4
LT		 328
329 /* check for sequential prestage - enhance cylinder range */
330 if (data->attributes.operation == DASD_SEQ_PRESTAGE ||
331 data->attributes.operation == DASD_SEQ_ACCESS) {
138c014d 332
b44b0ab3
SW		 333 if (endcyl + private->attrib.nr_cyl < private->real_cyl)
334 endcyl += private->attrib.nr_cyl;
1da177e4 335 else
b44b0ab3 336 endcyl = (private->real_cyl - 1);
1da177e4
LT		 337 }
338
b44b0ab3
SW		 339 set_ch_t(&data->beg_ext, begcyl, beghead);
340 set_ch_t(&data->end_ext, endcyl, endhead);
d54853ef 341 return rc;
1da177e4
LT		 342}
343
8e09f215 344
45f186be
JH		 345static void locate_record_ext(struct ccw1 *ccw, struct LRE_eckd_data *data,
346 unsigned int trk, unsigned int rec_on_trk,
347 int count, int cmd, struct dasd_device *device,
348 unsigned int reclen, unsigned int tlf)
f3eb5384 349{
543691a4 350 struct dasd_eckd_private *private = device->private;
f3eb5384
SW		 351 int sector;
352 int dn, d;
353
45f186be
JH		 354 if (ccw) {
355 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD_EXT;
356 ccw->flags = 0;
357 if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK)
358 ccw->count = 22;
359 else
360 ccw->count = 20;
361 ccw->cda = (__u32)__pa(data);
362 }
363
f3eb5384
SW		 364 memset(data, 0, sizeof(*data));
365 sector = 0;
366 if (rec_on_trk) {
367 switch (private->rdc_data.dev_type) {
368 case 0x3390:
369 dn = ceil_quot(reclen + 6, 232);
370 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
371 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
372 break;
373 case 0x3380:
374 d = 7 + ceil_quot(reclen + 12, 32);
375 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
376 break;
377 }
378 }
379 data->sector = sector;
380 /* note: meaning of count depends on the operation
381 * for record based I/O it's the number of records, but for
382 * track based I/O it's the number of tracks
383 */
384 data->count = count;
385 switch (cmd) {
386 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
387 data->operation.orientation = 0x3;
388 data->operation.operation = 0x03;
389 break;
390 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
391 data->operation.orientation = 0x3;
392 data->operation.operation = 0x16;
393 break;
394 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
395 data->operation.orientation = 0x1;
396 data->operation.operation = 0x03;
397 data->count++;
398 break;
399 case DASD_ECKD_CCW_READ_RECORD_ZERO:
400 data->operation.orientation = 0x3;
401 data->operation.operation = 0x16;
402 data->count++;
403 break;
404 case DASD_ECKD_CCW_WRITE:
405 case DASD_ECKD_CCW_WRITE_MT:
406 case DASD_ECKD_CCW_WRITE_KD:
407 case DASD_ECKD_CCW_WRITE_KD_MT:
408 data->auxiliary.length_valid = 0x1;
409 data->length = reclen;
410 data->operation.operation = 0x01;
411 break;
412 case DASD_ECKD_CCW_WRITE_CKD:
413 case DASD_ECKD_CCW_WRITE_CKD_MT:
414 data->auxiliary.length_valid = 0x1;
415 data->length = reclen;
416 data->operation.operation = 0x03;
417 break;
e4dbb0f2
SH		 418 case DASD_ECKD_CCW_WRITE_FULL_TRACK:
419 data->operation.orientation = 0x0;
420 data->operation.operation = 0x3F;
421 data->extended_operation = 0x11;
422 data->length = 0;
423 data->extended_parameter_length = 0x02;
424 if (data->count > 8) {
425 data->extended_parameter[0] = 0xFF;
426 data->extended_parameter[1] = 0xFF;
427 data->extended_parameter[1] <<= (16 - count);
428 } else {
429 data->extended_parameter[0] = 0xFF;
430 data->extended_parameter[0] <<= (8 - count);
431 data->extended_parameter[1] = 0x00;
432 }
433 data->sector = 0xFF;
434 break;
f3eb5384
SW		 435 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
436 data->auxiliary.length_valid = 0x1;
437 data->length = reclen; /* not tlf, as one might think */
438 data->operation.operation = 0x3F;
439 data->extended_operation = 0x23;
440 break;
441 case DASD_ECKD_CCW_READ:
442 case DASD_ECKD_CCW_READ_MT:
443 case DASD_ECKD_CCW_READ_KD:
444 case DASD_ECKD_CCW_READ_KD_MT:
445 data->auxiliary.length_valid = 0x1;
446 data->length = reclen;
447 data->operation.operation = 0x06;
448 break;
449 case DASD_ECKD_CCW_READ_CKD:
450 case DASD_ECKD_CCW_READ_CKD_MT:
451 data->auxiliary.length_valid = 0x1;
452 data->length = reclen;
453 data->operation.operation = 0x16;
454 break;
455 case DASD_ECKD_CCW_READ_COUNT:
456 data->operation.operation = 0x06;
457 break;
e4dbb0f2
SH		 458 case DASD_ECKD_CCW_READ_TRACK:
459 data->operation.orientation = 0x1;
460 data->operation.operation = 0x0C;
461 data->extended_parameter_length = 0;
462 data->sector = 0xFF;
463 break;
f3eb5384
SW		 464 case DASD_ECKD_CCW_READ_TRACK_DATA:
465 data->auxiliary.length_valid = 0x1;
466 data->length = tlf;
467 data->operation.operation = 0x0C;
468 break;
469 case DASD_ECKD_CCW_ERASE:
470 data->length = reclen;
471 data->auxiliary.length_valid = 0x1;
472 data->operation.operation = 0x0b;
473 break;
474 default:
475 DBF_DEV_EVENT(DBF_ERR, device,
476 "fill LRE unknown opcode 0x%x", cmd);
477 BUG();
478 }
479 set_ch_t(&data->seek_addr,
480 trk / private->rdc_data.trk_per_cyl,
481 trk % private->rdc_data.trk_per_cyl);
482 data->search_arg.cyl = data->seek_addr.cyl;
483 data->search_arg.head = data->seek_addr.head;
484 data->search_arg.record = rec_on_trk;
485}
486
487static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
488 unsigned int trk, unsigned int totrk, int cmd,
489 struct dasd_device *basedev, struct dasd_device *startdev,
45f186be 490 unsigned int format, unsigned int rec_on_trk, int count,
f3eb5384 491 unsigned int blksize, unsigned int tlf)
8e09f215
SW		 492{
493 struct dasd_eckd_private *basepriv, *startpriv;
f3eb5384 494 struct LRE_eckd_data *lredata;
45f186be 495 struct DE_eckd_data *dedata;
8e09f215
SW		 496 int rc = 0;
497
543691a4
SO		 498 basepriv = basedev->private;
499 startpriv = startdev->private;
f3eb5384
SW		 500 dedata = &pfxdata->define_extent;
501 lredata = &pfxdata->locate_record;
8e09f215
SW		 502
503 ccw->cmd_code = DASD_ECKD_CCW_PFX;
504 ccw->flags = 0;
e4dbb0f2
SH		 505 if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) {
506 ccw->count = sizeof(*pfxdata) + 2;
507 ccw->cda = (__u32) __pa(pfxdata);
508 memset(pfxdata, 0, sizeof(*pfxdata) + 2);
509 } else {
510 ccw->count = sizeof(*pfxdata);
511 ccw->cda = (__u32) __pa(pfxdata);
512 memset(pfxdata, 0, sizeof(*pfxdata));
513 }
8e09f215 514
8e09f215 515 /* prefix data */
f3eb5384
SW		 516 if (format > 1) {
517 DBF_DEV_EVENT(DBF_ERR, basedev,
518 "PFX LRE unknown format 0x%x", format);
519 BUG();
520 return -EINVAL;
521 }
522 pfxdata->format = format;
4abb08c2
SW		 523 pfxdata->base_address = basepriv->ned->unit_addr;
524 pfxdata->base_lss = basepriv->ned->ID;
f3eb5384 525 pfxdata->validity.define_extent = 1;
8e09f215
SW		 526
527 /* private uid is kept up to date, conf_data may be outdated */
da340f92 528 if (startpriv->uid.type == UA_BASE_PAV_ALIAS)
8e09f215 529 pfxdata->validity.verify_base = 1;
da340f92
SH		 530
531 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) {
532 pfxdata->validity.verify_base = 1;
533 pfxdata->validity.hyper_pav = 1;
8e09f215
SW		 534 }
535
45f186be 536 rc = define_extent(NULL, dedata, trk, totrk, cmd, basedev, blksize);
8e09f215 537
45f186be
JH		 538 /*
539 * For some commands the System Time Stamp is set in the define extent
540 * data when XRC is supported. The validity of the time stamp must be
541 * reflected in the prefix data as well.
542 */
543 if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02)
544 pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */
f3eb5384
SW		 545
546 if (format == 1) {
45f186be
JH		 547 locate_record_ext(NULL, lredata, trk, rec_on_trk, count, cmd,
548 basedev, blksize, tlf);
f3eb5384
SW		 549 }
550
8e09f215
SW		 551 return rc;
552}
553
f3eb5384
SW		 554static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
555 unsigned int trk, unsigned int totrk, int cmd,
556 struct dasd_device *basedev, struct dasd_device *startdev)
557{
558 return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev,
559 0, 0, 0, 0, 0);
560}
561
4d284cac 562static void
b44b0ab3
SW		 563locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk,
564 unsigned int rec_on_trk, int no_rec, int cmd,
1da177e4
LT		 565 struct dasd_device * device, int reclen)
566{
543691a4 567 struct dasd_eckd_private *private = device->private;
1da177e4
LT		 568 int sector;
569 int dn, d;
138c014d 570
1da177e4
LT		 571 DBF_DEV_EVENT(DBF_INFO, device,
572 "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d",
573 trk, rec_on_trk, no_rec, cmd, reclen);
574
575 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD;
576 ccw->flags = 0;
577 ccw->count = 16;
578 ccw->cda = (__u32) __pa(data);
579
8e09f215 580 memset(data, 0, sizeof(struct LO_eckd_data));
1da177e4
LT		 581 sector = 0;
582 if (rec_on_trk) {
583 switch (private->rdc_data.dev_type) {
584 case 0x3390:
585 dn = ceil_quot(reclen + 6, 232);
586 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
587 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
588 break;
589 case 0x3380:
590 d = 7 + ceil_quot(reclen + 12, 32);
591 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
592 break;
593 }
594 }
595 data->sector = sector;
596 data->count = no_rec;
597 switch (cmd) {
598 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
599 data->operation.orientation = 0x3;
600 data->operation.operation = 0x03;
601 break;
602 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
603 data->operation.orientation = 0x3;
604 data->operation.operation = 0x16;
605 break;
606 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
607 data->operation.orientation = 0x1;
608 data->operation.operation = 0x03;
609 data->count++;
610 break;
611 case DASD_ECKD_CCW_READ_RECORD_ZERO:
612 data->operation.orientation = 0x3;
613 data->operation.operation = 0x16;
614 data->count++;
615 break;
616 case DASD_ECKD_CCW_WRITE:
617 case DASD_ECKD_CCW_WRITE_MT:
618 case DASD_ECKD_CCW_WRITE_KD:
619 case DASD_ECKD_CCW_WRITE_KD_MT:
620 data->auxiliary.last_bytes_used = 0x1;
621 data->length = reclen;
622 data->operation.operation = 0x01;
623 break;
624 case DASD_ECKD_CCW_WRITE_CKD:
625 case DASD_ECKD_CCW_WRITE_CKD_MT:
626 data->auxiliary.last_bytes_used = 0x1;
627 data->length = reclen;
628 data->operation.operation = 0x03;
629 break;
630 case DASD_ECKD_CCW_READ:
631 case DASD_ECKD_CCW_READ_MT:
632 case DASD_ECKD_CCW_READ_KD:
633 case DASD_ECKD_CCW_READ_KD_MT:
634 data->auxiliary.last_bytes_used = 0x1;
635 data->length = reclen;
636 data->operation.operation = 0x06;
637 break;
638 case DASD_ECKD_CCW_READ_CKD:
639 case DASD_ECKD_CCW_READ_CKD_MT:
640 data->auxiliary.last_bytes_used = 0x1;
641 data->length = reclen;
642 data->operation.operation = 0x16;
643 break;
644 case DASD_ECKD_CCW_READ_COUNT:
645 data->operation.operation = 0x06;
646 break;
647 case DASD_ECKD_CCW_ERASE:
648 data->length = reclen;
649 data->auxiliary.last_bytes_used = 0x1;
650 data->operation.operation = 0x0b;
651 break;
652 default:
fc19f381
SH		 653 DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record "
654 "opcode 0x%x", cmd);
1da177e4 655 }
b44b0ab3
SW		 656 set_ch_t(&data->seek_addr,
657 trk / private->rdc_data.trk_per_cyl,
658 trk % private->rdc_data.trk_per_cyl);
659 data->search_arg.cyl = data->seek_addr.cyl;
660 data->search_arg.head = data->seek_addr.head;
1da177e4
LT		 661 data->search_arg.record = rec_on_trk;
662}
663
664/*
665 * Returns 1 if the block is one of the special blocks that needs
666 * to get read/written with the KD variant of the command.
667 * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and
668 * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT.
669 * Luckily the KD variants differ only by one bit (0x08) from the
670 * normal variant. So don't wonder about code like:
671 * if (dasd_eckd_cdl_special(blk_per_trk, recid))
672 * ccw->cmd_code |= 0x8;
673 */
674static inline int
675dasd_eckd_cdl_special(int blk_per_trk, int recid)
676{
677 if (recid < 3)
678 return 1;
679 if (recid < blk_per_trk)
680 return 0;
681 if (recid < 2 * blk_per_trk)
682 return 1;
683 return 0;
684}
685
686/*
687 * Returns the record size for the special blocks of the cdl format.
688 * Only returns something useful if dasd_eckd_cdl_special is true
689 * for the recid.
690 */
691static inline int
692dasd_eckd_cdl_reclen(int recid)
693{
694 if (recid < 3)
695 return sizes_trk0[recid];
696 return LABEL_SIZE;
697}
b206181d
SH		 698/* create unique id from private structure. */
699static void create_uid(struct dasd_eckd_private *private)
3d052595 700{
4abb08c2 701 int count;
b206181d 702 struct dasd_uid *uid;
3d052595 703
2dedf0d9 704 uid = &private->uid;
3d052595 705 memset(uid, 0, sizeof(struct dasd_uid));
4abb08c2 706 memcpy(uid->vendor, private->ned->HDA_manufacturer,
d0710c7c 707 sizeof(uid->vendor) - 1);
3d052595 708 EBCASC(uid->vendor, sizeof(uid->vendor) - 1);
4abb08c2 709 memcpy(uid->serial, private->ned->HDA_location,
d0710c7c 710 sizeof(uid->serial) - 1);
3d052595 711 EBCASC(uid->serial, sizeof(uid->serial) - 1);
4abb08c2 712 uid->ssid = private->gneq->subsystemID;
a419aef8 713 uid->real_unit_addr = private->ned->unit_addr;
4abb08c2
SW		 714 if (private->sneq) {
715 uid->type = private->sneq->sua_flags;
8e09f215 716 if (uid->type == UA_BASE_PAV_ALIAS)
4abb08c2 717 uid->base_unit_addr = private->sneq->base_unit_addr;
8e09f215
SW		 718 } else {
719 uid->type = UA_BASE_DEVICE;
720 }
4abb08c2
SW		 721 if (private->vdsneq) {
722 for (count = 0; count < 16; count++) {
723 sprintf(uid->vduit+2*count, "%02x",
724 private->vdsneq->uit[count]);
725 }
726 }
b206181d
SH		 727}
728
729/*
730 * Generate device unique id that specifies the physical device.
731 */
732static int dasd_eckd_generate_uid(struct dasd_device *device)
733{
543691a4 734 struct dasd_eckd_private *private = device->private;
b206181d
SH		 735 unsigned long flags;
736
b206181d
SH		 737 if (!private)
738 return -ENODEV;
739 if (!private->ned || !private->gneq)
740 return -ENODEV;
741 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
742 create_uid(private);
2dedf0d9 743 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
3d052595
HH		 744 return 0;
745}
746
2dedf0d9
SH		 747static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid)
748{
543691a4 749 struct dasd_eckd_private *private = device->private;
2dedf0d9
SH		 750 unsigned long flags;
751
543691a4 752 if (private) {
2dedf0d9
SH		 753 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
754 *uid = private->uid;
755 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
756 return 0;
757 }
758 return -EINVAL;
759}
760
b206181d
SH		 761/*
762 * compare device UID with data of a given dasd_eckd_private structure
763 * return 0 for match
764 */
765static int dasd_eckd_compare_path_uid(struct dasd_device *device,
766 struct dasd_eckd_private *private)
767{
768 struct dasd_uid device_uid;
769
770 create_uid(private);
771 dasd_eckd_get_uid(device, &device_uid);
772
773 return memcmp(&device_uid, &private->uid, sizeof(struct dasd_uid));
774}
775
a4d26c6a
SW		 776static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device,
777 struct dasd_ccw_req *cqr,
778 __u8 *rcd_buffer,
779 __u8 lpm)
17283b56 780{
17283b56 781 struct ccw1 *ccw;
a4d26c6a
SW		 782 /*
783 * buffer has to start with EBCDIC "V1.0" to show
784 * support for virtual device SNEQ
785 */
786 rcd_buffer[0] = 0xE5;
787 rcd_buffer[1] = 0xF1;
788 rcd_buffer[2] = 0x4B;
789 rcd_buffer[3] = 0xF0;
17283b56
CH		 790
791 ccw = cqr->cpaddr;
a4d26c6a
SW		 792 ccw->cmd_code = DASD_ECKD_CCW_RCD;
793 ccw->flags = 0;
17283b56 794 ccw->cda = (__u32)(addr_t)rcd_buffer;
a4d26c6a
SW		 795 ccw->count = DASD_ECKD_RCD_DATA_SIZE;
796 cqr->magic = DASD_ECKD_MAGIC;
17283b56 797
8e09f215
SW		 798 cqr->startdev = device;
799 cqr->memdev = device;
800 cqr->block = NULL;
17283b56
CH		 801 cqr->expires = 10*HZ;
802 cqr->lpm = lpm;
eb6e199b 803 cqr->retries = 256;
1aae0560 804 cqr->buildclk = get_tod_clock();
17283b56 805 cqr->status = DASD_CQR_FILLED;
a4d26c6a
SW		 806 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags);
807}
808
5915a873
SH		 809/*
810 * Wakeup helper for read_conf
811 * if the cqr is not done and needs some error recovery
812 * the buffer has to be re-initialized with the EBCDIC "V1.0"
813 * to show support for virtual device SNEQ
814 */
815static void read_conf_cb(struct dasd_ccw_req *cqr, void *data)
816{
817 struct ccw1 *ccw;
818 __u8 *rcd_buffer;
819
820 if (cqr->status != DASD_CQR_DONE) {
821 ccw = cqr->cpaddr;
822 rcd_buffer = (__u8 *)((addr_t) ccw->cda);
823 memset(rcd_buffer, 0, sizeof(*rcd_buffer));
824
825 rcd_buffer[0] = 0xE5;
826 rcd_buffer[1] = 0xF1;
827 rcd_buffer[2] = 0x4B;
828 rcd_buffer[3] = 0xF0;
829 }
830 dasd_wakeup_cb(cqr, data);
831}
832
a4d26c6a
SW		 833static int dasd_eckd_read_conf_immediately(struct dasd_device *device,
834 struct dasd_ccw_req *cqr,
835 __u8 *rcd_buffer,
836 __u8 lpm)
837{
838 struct ciw *ciw;
839 int rc;
840 /*
841 * sanity check: scan for RCD command in extended SenseID data
842 * some devices do not support RCD
843 */
844 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD);
845 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD)
846 return -EOPNOTSUPP;
847
848 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm);
849 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
5a27e60d 850 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags);
a4d26c6a 851 cqr->retries = 5;
5915a873 852 cqr->callback = read_conf_cb;
a4d26c6a
SW		 853 rc = dasd_sleep_on_immediatly(cqr);
854 return rc;
17283b56
CH		 855}
856
857static int dasd_eckd_read_conf_lpm(struct dasd_device *device,
858 void **rcd_buffer,
859 int *rcd_buffer_size, __u8 lpm)
860{
861 struct ciw *ciw;
862 char *rcd_buf = NULL;
863 int ret;
864 struct dasd_ccw_req *cqr;
865
866 /*
a4d26c6a
SW		 867 * sanity check: scan for RCD command in extended SenseID data
868 * some devices do not support RCD
17283b56
CH		 869 */
870 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD);
a4d26c6a 871 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) {
17283b56
CH		 872 ret = -EOPNOTSUPP;
873 goto out_error;
874 }
a4d26c6a 875 rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA);
17283b56
CH		 876 if (!rcd_buf) {
877 ret = -ENOMEM;
878 goto out_error;
879 }
a4d26c6a
SW		 880 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */,
881 0, /* use rcd_buf as data ara */
c5205f2f 882 device, NULL);
17283b56 883 if (IS_ERR(cqr)) {
a4d26c6a
SW		 884 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
885 "Could not allocate RCD request");
886 ret = -ENOMEM;
17283b56
CH		 887 goto out_error;
888 }
a4d26c6a 889 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm);
5915a873 890 cqr->callback = read_conf_cb;
17283b56
CH		 891 ret = dasd_sleep_on(cqr);
892 /*
893 * on success we update the user input parms
894 */
8e09f215 895 dasd_sfree_request(cqr, cqr->memdev);
17283b56
CH		 896 if (ret)
897 goto out_error;
898
a4d26c6a 899 *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE;
17283b56
CH		 900 *rcd_buffer = rcd_buf;
901 return 0;
902out_error:
903 kfree(rcd_buf);
904 *rcd_buffer = NULL;
905 *rcd_buffer_size = 0;
906 return ret;
907}
908
4abb08c2
SW		 909static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private)
910{
911
912 struct dasd_sneq *sneq;
913 int i, count;
914
915 private->ned = NULL;
916 private->sneq = NULL;
917 private->vdsneq = NULL;
918 private->gneq = NULL;
919 count = private->conf_len / sizeof(struct dasd_sneq);
920 sneq = (struct dasd_sneq *)private->conf_data;
921 for (i = 0; i < count; ++i) {
922 if (sneq->flags.identifier == 1 && sneq->format == 1)
923 private->sneq = sneq;
924 else if (sneq->flags.identifier == 1 && sneq->format == 4)
925 private->vdsneq = (struct vd_sneq *)sneq;
926 else if (sneq->flags.identifier == 2)
927 private->gneq = (struct dasd_gneq *)sneq;
928 else if (sneq->flags.identifier == 3 && sneq->res1 == 1)
929 private->ned = (struct dasd_ned *)sneq;
930 sneq++;
931 }
932 if (!private->ned || !private->gneq) {
933 private->ned = NULL;
934 private->sneq = NULL;
935 private->vdsneq = NULL;
936 private->gneq = NULL;
937 return -EINVAL;
938 }
939 return 0;
940
941};
942
943static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len)
944{
945 struct dasd_gneq *gneq;
946 int i, count, found;
947
948 count = conf_len / sizeof(*gneq);
949 gneq = (struct dasd_gneq *)conf_data;
950 found = 0;
951 for (i = 0; i < count; ++i) {
952 if (gneq->flags.identifier == 2) {
953 found = 1;
954 break;
955 }
956 gneq++;
957 }
958 if (found)
959 return ((char *)gneq)[18] & 0x07;
960 else
961 return 0;
962}
963
c7c0c9de
SH		 964static void dasd_eckd_clear_conf_data(struct dasd_device *device)
965{
543691a4 966 struct dasd_eckd_private *private = device->private;
c7c0c9de
SH		 967 int i;
968
c7c0c9de
SH		 969 private->conf_data = NULL;
970 private->conf_len = 0;
971 for (i = 0; i < 8; i++) {
c9346151
SH		 972 kfree(device->path[i].conf_data);
973 device->path[i].conf_data = NULL;
a521b048
SH		 974 device->path[i].cssid = 0;
975 device->path[i].ssid = 0;
976 device->path[i].chpid = 0;
c7c0c9de
SH		 977 }
978}
979
980
4abb08c2 981static int dasd_eckd_read_conf(struct dasd_device *device)
1da177e4
LT		 982{
983 void *conf_data;
984 int conf_len, conf_data_saved;
b179b037 985 int rc, path_err, pos;
a4d26c6a 986 __u8 lpm, opm;
b206181d 987 struct dasd_eckd_private *private, path_private;
b206181d
SH		 988 struct dasd_uid *uid;
989 char print_path_uid[60], print_device_uid[60];
ded27d8d 990 struct channel_path_desc_fmt0 *chp_desc;
a521b048 991 struct subchannel_id sch_id;
1da177e4 992
543691a4 993 private = device->private;
a4d26c6a 994 opm = ccw_device_get_path_mask(device->cdev);
a521b048 995 ccw_device_get_schid(device->cdev, &sch_id);
1da177e4 996 conf_data_saved = 0;
55d3a85c 997 path_err = 0;
1da177e4
LT		 998 /* get configuration data per operational path */
999 for (lpm = 0x80; lpm; lpm>>= 1) {
b206181d
SH		 1000 if (!(lpm & opm))
1001 continue;
1002 rc = dasd_eckd_read_conf_lpm(device, &conf_data,
1003 &conf_len, lpm);
1004 if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */
1005 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1006 "Read configuration data returned "
1007 "error %d", rc);
1008 return rc;
1009 }
1010 if (conf_data == NULL) {
1011 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1012 "No configuration data "
1013 "retrieved");
1014 /* no further analysis possible */
c9346151 1015 dasd_path_add_opm(device, opm);
b206181d
SH		 1016 continue; /* no error */
1017 }
1018 /* save first valid configuration data */
1019 if (!conf_data_saved) {
c7c0c9de
SH		 1020 /* initially clear previously stored conf_data */
1021 dasd_eckd_clear_conf_data(device);
b206181d
SH		 1022 private->conf_data = conf_data;
1023 private->conf_len = conf_len;
1024 if (dasd_eckd_identify_conf_parts(private)) {
1025 private->conf_data = NULL;
1026 private->conf_len = 0;
1027 kfree(conf_data);
1028 continue;
1da177e4 1029 }
c7c0c9de
SH		 1030 pos = pathmask_to_pos(lpm);
1031 /* store per path conf_data */
c9346151 1032 device->path[pos].conf_data = conf_data;
a521b048
SH		 1033 device->path[pos].cssid = sch_id.cssid;
1034 device->path[pos].ssid = sch_id.ssid;
1035 chp_desc = ccw_device_get_chp_desc(device->cdev, pos);
1036 if (chp_desc)
1037 device->path[pos].chpid = chp_desc->chpid;
1038 kfree(chp_desc);
b206181d
SH		 1039 /*
1040 * build device UID that other path data
1041 * can be compared to it
1042 */
1043 dasd_eckd_generate_uid(device);
1044 conf_data_saved++;
1045 } else {
1046 path_private.conf_data = conf_data;
1047 path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE;
1048 if (dasd_eckd_identify_conf_parts(
1049 &path_private)) {
1050 path_private.conf_data = NULL;
1051 path_private.conf_len = 0;
1052 kfree(conf_data);
1053 continue;
1da177e4 1054 }
b206181d
SH		 1055 if (dasd_eckd_compare_path_uid(
1056 device, &path_private)) {
1057 uid = &path_private.uid;
1058 if (strlen(uid->vduit) > 0)
1059 snprintf(print_path_uid,
1060 sizeof(print_path_uid),
1061 "%s.%s.%04x.%02x.%s",
1062 uid->vendor, uid->serial,
1063 uid->ssid, uid->real_unit_addr,
1064 uid->vduit);
1065 else
1066 snprintf(print_path_uid,
1067 sizeof(print_path_uid),
1068 "%s.%s.%04x.%02x",
1069 uid->vendor, uid->serial,
1070 uid->ssid,
1071 uid->real_unit_addr);
1072 uid = &private->uid;
1073 if (strlen(uid->vduit) > 0)
1074 snprintf(print_device_uid,
1075 sizeof(print_device_uid),
1076 "%s.%s.%04x.%02x.%s",
1077 uid->vendor, uid->serial,
1078 uid->ssid, uid->real_unit_addr,
1079 uid->vduit);
1080 else
1081 snprintf(print_device_uid,
1082 sizeof(print_device_uid),
1083 "%s.%s.%04x.%02x",
1084 uid->vendor, uid->serial,
1085 uid->ssid,
1086 uid->real_unit_addr);
1087 dev_err(&device->cdev->dev,
1088 "Not all channel paths lead to "
1089 "the same device, path %02X leads to "
1090 "device %s instead of %s\n", lpm,
1091 print_path_uid, print_device_uid);
55d3a85c 1092 path_err = -EINVAL;
c9346151 1093 dasd_path_add_cablepm(device, lpm);
55d3a85c 1094 continue;
1da177e4 1095 }
c7c0c9de
SH		 1096 pos = pathmask_to_pos(lpm);
1097 /* store per path conf_data */
c9346151 1098 device->path[pos].conf_data = conf_data;
a521b048
SH		 1099 device->path[pos].cssid = sch_id.cssid;
1100 device->path[pos].ssid = sch_id.ssid;
1101 chp_desc = ccw_device_get_chp_desc(device->cdev, pos);
1102 if (chp_desc)
1103 device->path[pos].chpid = chp_desc->chpid;
1104 kfree(chp_desc);
b206181d
SH		 1105 path_private.conf_data = NULL;
1106 path_private.conf_len = 0;
1107 }
1108 switch (dasd_eckd_path_access(conf_data, conf_len)) {
1109 case 0x02:
c9346151 1110 dasd_path_add_nppm(device, lpm);
b206181d
SH		 1111 break;
1112 case 0x03:
c9346151 1113 dasd_path_add_ppm(device, lpm);
b206181d 1114 break;
1da177e4 1115 }
c9346151
SH		 1116 if (!dasd_path_get_opm(device)) {
1117 dasd_path_set_opm(device, lpm);
ccc0e7dc
SH		 1118 dasd_generic_path_operational(device);
1119 } else {
c9346151 1120 dasd_path_add_opm(device, lpm);
ccc0e7dc 1121 }
1da177e4 1122 }
b206181d 1123
55d3a85c 1124 return path_err;
1da177e4
LT		 1125}
1126
a521b048
SH		 1127static u32 get_fcx_max_data(struct dasd_device *device)
1128{
1129 struct dasd_eckd_private *private = device->private;
1130 int fcx_in_css, fcx_in_gneq, fcx_in_features;
1131 int tpm, mdc;
1132
1133 if (dasd_nofcx)
1134 return 0;
1135 /* is transport mode supported? */
1136 fcx_in_css = css_general_characteristics.fcx;
1137 fcx_in_gneq = private->gneq->reserved2[7] & 0x04;
1138 fcx_in_features = private->features.feature[40] & 0x80;
1139 tpm = fcx_in_css && fcx_in_gneq && fcx_in_features;
1140
1141 if (!tpm)
1142 return 0;
1143
1144 mdc = ccw_device_get_mdc(device->cdev, 0);
1145 if (mdc < 0) {
1146 dev_warn(&device->cdev->dev, "Detecting the maximum supported data size for zHPF requests failed\n");
1147 return 0;
1148 } else {
1149 return (u32)mdc * FCX_MAX_DATA_FACTOR;
1150 }
1151}
1152
a4d26c6a
SW		 1153static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm)
1154{
543691a4 1155 struct dasd_eckd_private *private = device->private;
a4d26c6a
SW		 1156 int mdc;
1157 u32 fcx_max_data;
1158
a4d26c6a
SW		 1159 if (private->fcx_max_data) {
1160 mdc = ccw_device_get_mdc(device->cdev, lpm);
1161 if ((mdc < 0)) {
1162 dev_warn(&device->cdev->dev,
1163 "Detecting the maximum data size for zHPF "
1164 "requests failed (rc=%d) for a new path %x\n",
1165 mdc, lpm);
1166 return mdc;
1167 }
0f02c4e7 1168 fcx_max_data = (u32)mdc * FCX_MAX_DATA_FACTOR;
a4d26c6a
SW		 1169 if (fcx_max_data < private->fcx_max_data) {
1170 dev_warn(&device->cdev->dev,
1171 "The maximum data size for zHPF requests %u "
1172 "on a new path %x is below the active maximum "
1173 "%u\n", fcx_max_data, lpm,
1174 private->fcx_max_data);
1175 return -EACCES;
1176 }
1177 }
1178 return 0;
1179}
1180
b206181d
SH		 1181static int rebuild_device_uid(struct dasd_device *device,
1182 struct path_verification_work_data *data)
1183{
543691a4 1184 struct dasd_eckd_private *private = device->private;
c9346151 1185 __u8 lpm, opm = dasd_path_get_opm(device);
543691a4 1186 int rc = -ENODEV;
b206181d
SH		 1187
1188 for (lpm = 0x80; lpm; lpm >>= 1) {
1189 if (!(lpm & opm))
1190 continue;
1191 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer));
1192 memset(&data->cqr, 0, sizeof(data->cqr));
1193 data->cqr.cpaddr = &data->ccw;
1194 rc = dasd_eckd_read_conf_immediately(device, &data->cqr,
1195 data->rcd_buffer,
1196 lpm);
1197
1198 if (rc) {
1199 if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */
1200 continue;
1201 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1202 "Read configuration data "
1203 "returned error %d", rc);
1204 break;
1205 }
1206 memcpy(private->conf_data, data->rcd_buffer,
1207 DASD_ECKD_RCD_DATA_SIZE);
1208 if (dasd_eckd_identify_conf_parts(private)) {
1209 rc = -ENODEV;
1210 } else /* first valid path is enough */
1211 break;
1212 }
1213
1214 if (!rc)
1215 rc = dasd_eckd_generate_uid(device);
1216
1217 return rc;
1218}
1219
a4d26c6a
SW		 1220static void do_path_verification_work(struct work_struct *work)
1221{
1222 struct path_verification_work_data *data;
1223 struct dasd_device *device;
b206181d
SH		 1224 struct dasd_eckd_private path_private;
1225 struct dasd_uid *uid;
1226 __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE];
5db8440c 1227 __u8 lpm, opm, npm, ppm, epm, hpfpm, cablepm;
a4d26c6a 1228 unsigned long flags;
b206181d 1229 char print_uid[60];
a4d26c6a
SW		 1230 int rc;
1231
1232 data = container_of(work, struct path_verification_work_data, worker);
1233 device = data->device;
1234
c8d1c0ff
SH		 1235 /* delay path verification until device was resumed */
1236 if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) {
1237 schedule_work(work);
1238 return;
1239 }
1eb38023
SH		 1240 /* check if path verification already running and delay if so */
1241 if (test_and_set_bit(DASD_FLAG_PATH_VERIFY, &device->flags)) {
1242 schedule_work(work);
1243 return;
1244 }
a4d26c6a
SW		 1245 opm = 0;
1246 npm = 0;
1247 ppm = 0;
1248 epm = 0;
5db8440c
SH		 1249 hpfpm = 0;
1250 cablepm = 0;
1251
a4d26c6a 1252 for (lpm = 0x80; lpm; lpm >>= 1) {
b206181d
SH		 1253 if (!(lpm & data->tbvpm))
1254 continue;
1255 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer));
1256 memset(&data->cqr, 0, sizeof(data->cqr));
1257 data->cqr.cpaddr = &data->ccw;
1258 rc = dasd_eckd_read_conf_immediately(device, &data->cqr,
1259 data->rcd_buffer,
1260 lpm);
1261 if (!rc) {
1262 switch (dasd_eckd_path_access(data->rcd_buffer,
1263 DASD_ECKD_RCD_DATA_SIZE)
1264 ) {
1265 case 0x02:
1266 npm |= lpm;
1267 break;
1268 case 0x03:
1269 ppm |= lpm;
1270 break;
1271 }
1272 opm |= lpm;
1273 } else if (rc == -EOPNOTSUPP) {
1274 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1275 "path verification: No configuration "
1276 "data retrieved");
1277 opm |= lpm;
1278 } else if (rc == -EAGAIN) {
1279 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
a4d26c6a
SW		 1280 "path verification: device is stopped,"
1281 " try again later");
b206181d
SH		 1282 epm |= lpm;
1283 } else {
1284 dev_warn(&device->cdev->dev,
1285 "Reading device feature codes failed "
1286 "(rc=%d) for new path %x\n", rc, lpm);
1287 continue;
1288 }
1289 if (verify_fcx_max_data(device, lpm)) {
1290 opm &= ~lpm;
1291 npm &= ~lpm;
1292 ppm &= ~lpm;
5db8440c 1293 hpfpm |= lpm;
b206181d
SH		 1294 continue;
1295 }
1296
1297 /*
1298 * save conf_data for comparison after
1299 * rebuild_device_uid may have changed
1300 * the original data
1301 */
1302 memcpy(&path_rcd_buf, data->rcd_buffer,
1303 DASD_ECKD_RCD_DATA_SIZE);
1304 path_private.conf_data = (void *) &path_rcd_buf;
1305 path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE;
1306 if (dasd_eckd_identify_conf_parts(&path_private)) {
1307 path_private.conf_data = NULL;
1308 path_private.conf_len = 0;
1309 continue;
1310 }
1311
1312 /*
1313 * compare path UID with device UID only if at least
1314 * one valid path is left
1315 * in other case the device UID may have changed and
1316 * the first working path UID will be used as device UID
1317 */
c9346151 1318 if (dasd_path_get_opm(device) &&
b206181d
SH		 1319 dasd_eckd_compare_path_uid(device, &path_private)) {
1320 /*
1321 * the comparison was not successful
1322 * rebuild the device UID with at least one
1323 * known path in case a z/VM hyperswap command
1324 * has changed the device
1325 *
1326 * after this compare again
1327 *
1328 * if either the rebuild or the recompare fails
1329 * the path can not be used
1330 */
1331 if (rebuild_device_uid(device, data) ||
1332 dasd_eckd_compare_path_uid(
1333 device, &path_private)) {
1334 uid = &path_private.uid;
1335 if (strlen(uid->vduit) > 0)
1336 snprintf(print_uid, sizeof(print_uid),
1337 "%s.%s.%04x.%02x.%s",
1338 uid->vendor, uid->serial,
1339 uid->ssid, uid->real_unit_addr,
1340 uid->vduit);
1341 else
1342 snprintf(print_uid, sizeof(print_uid),
1343 "%s.%s.%04x.%02x",
1344 uid->vendor, uid->serial,
1345 uid->ssid,
1346 uid->real_unit_addr);
1347 dev_err(&device->cdev->dev,
1348 "The newly added channel path %02X "
1349 "will not be used because it leads "
1350 "to a different device %s\n",
1351 lpm, print_uid);
a4d26c6a
SW		 1352 opm &= ~lpm;
1353 npm &= ~lpm;
1354 ppm &= ~lpm;
5db8440c 1355 cablepm |= lpm;
b206181d 1356 continue;
a4d26c6a
SW		 1357 }
1358 }
b206181d
SH		 1359
1360 /*
1361 * There is a small chance that a path is lost again between
1362 * above path verification and the following modification of
1363 * the device opm mask. We could avoid that race here by using
1364 * yet another path mask, but we rather deal with this unlikely
1365 * situation in dasd_start_IO.
1366 */
1367 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
c9346151
SH		 1368 if (!dasd_path_get_opm(device) && opm) {
1369 dasd_path_set_opm(device, opm);
b206181d 1370 dasd_generic_path_operational(device);
5db8440c 1371 } else {
c9346151 1372 dasd_path_add_opm(device, opm);
5db8440c 1373 }
c9346151
SH		 1374 dasd_path_add_nppm(device, npm);
1375 dasd_path_add_ppm(device, ppm);
1376 dasd_path_add_tbvpm(device, epm);
1377 dasd_path_add_cablepm(device, cablepm);
1378 dasd_path_add_nohpfpm(device, hpfpm);
b206181d 1379 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
a4d26c6a 1380 }
1eb38023 1381 clear_bit(DASD_FLAG_PATH_VERIFY, &device->flags);
a4d26c6a
SW		 1382 dasd_put_device(device);
1383 if (data->isglobal)
1384 mutex_unlock(&dasd_path_verification_mutex);
1385 else
1386 kfree(data);
1387}
1388
1389static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm)
1390{
1391 struct path_verification_work_data *data;
1392
1393 data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA);
1394 if (!data) {
1395 if (mutex_trylock(&dasd_path_verification_mutex)) {
1396 data = path_verification_worker;
1397 data->isglobal = 1;
1398 } else
1399 return -ENOMEM;
1400 } else {
1401 memset(data, 0, sizeof(*data));
1402 data->isglobal = 0;
1403 }
1404 INIT_WORK(&data->worker, do_path_verification_work);
1405 dasd_get_device(device);
1406 data->device = device;
1407 data->tbvpm = lpm;
1408 schedule_work(&data->worker);
1409 return 0;
1410}
1411
a521b048
SH		 1412static void dasd_eckd_reset_path(struct dasd_device *device, __u8 pm)
1413{
1414 struct dasd_eckd_private *private = device->private;
1415 unsigned long flags;
1416
1417 if (!private->fcx_max_data)
1418 private->fcx_max_data = get_fcx_max_data(device);
1419 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
1420 dasd_path_set_tbvpm(device, pm ? : dasd_path_get_notoperpm(device));
1421 dasd_schedule_device_bh(device);
1422 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
1423}
1424
8e09f215
SW		 1425static int dasd_eckd_read_features(struct dasd_device *device)
1426{
543691a4 1427 struct dasd_eckd_private *private = device->private;
8e09f215
SW		 1428 struct dasd_psf_prssd_data *prssdp;
1429 struct dasd_rssd_features *features;
1430 struct dasd_ccw_req *cqr;
1431 struct ccw1 *ccw;
1432 int rc;
8e09f215 1433
68d1e5f0 1434 memset(&private->features, 0, sizeof(struct dasd_rssd_features));
68b781fe 1435 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
8e09f215
SW		 1436 (sizeof(struct dasd_psf_prssd_data) +
1437 sizeof(struct dasd_rssd_features)),
c5205f2f 1438 device, NULL);
8e09f215 1439 if (IS_ERR(cqr)) {
b8ed5dd5
SH		 1440 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not "
1441 "allocate initialization request");
8e09f215
SW		 1442 return PTR_ERR(cqr);
1443 }
1444 cqr->startdev = device;
1445 cqr->memdev = device;
1446 cqr->block = NULL;
eb6e199b 1447 cqr->retries = 256;
8e09f215
SW		 1448 cqr->expires = 10 * HZ;
1449
1450 /* Prepare for Read Subsystem Data */
1451 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
1452 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
1453 prssdp->order = PSF_ORDER_PRSSD;
1454 prssdp->suborder = 0x41; /* Read Feature Codes */
1455 /* all other bytes of prssdp must be zero */
1456
1457 ccw = cqr->cpaddr;
1458 ccw->cmd_code = DASD_ECKD_CCW_PSF;
1459 ccw->count = sizeof(struct dasd_psf_prssd_data);
1460 ccw->flags |= CCW_FLAG_CC;
1461 ccw->cda = (__u32)(addr_t) prssdp;
1462
1463 /* Read Subsystem Data - feature codes */
1464 features = (struct dasd_rssd_features *) (prssdp + 1);
1465 memset(features, 0, sizeof(struct dasd_rssd_features));
1466
1467 ccw++;
1468 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
1469 ccw->count = sizeof(struct dasd_rssd_features);
1470 ccw->cda = (__u32)(addr_t) features;
1471
1aae0560 1472 cqr->buildclk = get_tod_clock();
8e09f215
SW		 1473 cqr->status = DASD_CQR_FILLED;
1474 rc = dasd_sleep_on(cqr);
1475 if (rc == 0) {
1476 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
1477 features = (struct dasd_rssd_features *) (prssdp + 1);
1478 memcpy(&private->features, features,
1479 sizeof(struct dasd_rssd_features));
68d1e5f0
SW		 1480 } else
1481 dev_warn(&device->cdev->dev, "Reading device feature codes"
1482 " failed with rc=%d\n", rc);
8e09f215
SW		 1483 dasd_sfree_request(cqr, cqr->memdev);
1484 return rc;
1485}
1486
c729696b
JH		 1487/* Read Volume Information - Volume Storage Query */
1488static int dasd_eckd_read_vol_info(struct dasd_device *device)
1489{
1490 struct dasd_eckd_private *private = device->private;
1491 struct dasd_psf_prssd_data *prssdp;
1492 struct dasd_rssd_vsq *vsq;
1493 struct dasd_ccw_req *cqr;
1494 struct ccw1 *ccw;
9e12e54c 1495 int useglobal;
c729696b
JH		 1496 int rc;
1497
1498 /* This command cannot be executed on an alias device */
1499 if (private->uid.type == UA_BASE_PAV_ALIAS ||
1500 private->uid.type == UA_HYPER_PAV_ALIAS)
1501 return 0;
1502
9e12e54c 1503 useglobal = 0;
c729696b
JH		 1504 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 /* PSF + RSSD */,
1505 sizeof(*prssdp) + sizeof(*vsq), device, NULL);
1506 if (IS_ERR(cqr)) {
1507 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1508 "Could not allocate initialization request");
9e12e54c
JH		 1509 mutex_lock(&dasd_vol_info_mutex);
1510 useglobal = 1;
1511 cqr = &dasd_vol_info_req->cqr;
1512 memset(cqr, 0, sizeof(*cqr));
1513 memset(dasd_vol_info_req, 0, sizeof(*dasd_vol_info_req));
1514 cqr->cpaddr = &dasd_vol_info_req->ccw;
1515 cqr->data = &dasd_vol_info_req->data;
1516 cqr->magic = DASD_ECKD_MAGIC;
c729696b
JH		 1517 }
1518
1519 /* Prepare for Read Subsystem Data */
1520 prssdp = cqr->data;
1521 prssdp->order = PSF_ORDER_PRSSD;
1522 prssdp->suborder = PSF_SUBORDER_VSQ; /* Volume Storage Query */
1523 prssdp->lss = private->ned->ID;
1524 prssdp->volume = private->ned->unit_addr;
1525
1526 ccw = cqr->cpaddr;
1527 ccw->cmd_code = DASD_ECKD_CCW_PSF;
1528 ccw->count = sizeof(*prssdp);
1529 ccw->flags |= CCW_FLAG_CC;
1530 ccw->cda = (__u32)(addr_t)prssdp;
1531
1532 /* Read Subsystem Data - Volume Storage Query */
1533 vsq = (struct dasd_rssd_vsq *)(prssdp + 1);
1534 memset(vsq, 0, sizeof(*vsq));
1535
1536 ccw++;
1537 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
1538 ccw->count = sizeof(*vsq);
1539 ccw->flags |= CCW_FLAG_SLI;
1540 ccw->cda = (__u32)(addr_t)vsq;
1541
1542 cqr->buildclk = get_tod_clock();
1543 cqr->status = DASD_CQR_FILLED;
1544 cqr->startdev = device;
1545 cqr->memdev = device;
1546 cqr->block = NULL;
1547 cqr->retries = 256;
1548 cqr->expires = device->default_expires * HZ;
1549 /* The command might not be supported. Suppress the error output */
1550 __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags);
1551
1552 rc = dasd_sleep_on_interruptible(cqr);
1553 if (rc == 0) {
1554 memcpy(&private->vsq, vsq, sizeof(*vsq));
1555 } else {
dd454839
JH		 1556 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1557 "Reading the volume storage information failed with rc=%d", rc);
c729696b
JH		 1558 }
1559
9e12e54c
JH		 1560 if (useglobal)
1561 mutex_unlock(&dasd_vol_info_mutex);
1562 else
1563 dasd_sfree_request(cqr, cqr->memdev);
c729696b
JH		 1564
1565 return rc;
1566}
1567
1568static int dasd_eckd_is_ese(struct dasd_device *device)
1569{
1570 struct dasd_eckd_private *private = device->private;
1571
1572 return private->vsq.vol_info.ese;
1573}
1574
1575static int dasd_eckd_ext_pool_id(struct dasd_device *device)
1576{
1577 struct dasd_eckd_private *private = device->private;
1578
1579 return private->vsq.extent_pool_id;
1580}
1581
1582/*
1583 * This value represents the total amount of available space. As more space is
1584 * allocated by ESE volumes, this value will decrease.
1585 * The data for this value is therefore updated on any call.
1586 */
1587static int dasd_eckd_space_configured(struct dasd_device *device)
1588{
1589 struct dasd_eckd_private *private = device->private;
1590 int rc;
1591
1592 rc = dasd_eckd_read_vol_info(device);
1593
1594 return rc ? : private->vsq.space_configured;
1595}
1596
1597/*
1598 * The value of space allocated by an ESE volume may have changed and is
1599 * therefore updated on any call.
1600 */
1601static int dasd_eckd_space_allocated(struct dasd_device *device)
1602{
1603 struct dasd_eckd_private *private = device->private;
1604 int rc;
1605
1606 rc = dasd_eckd_read_vol_info(device);
1607
1608 return rc ? : private->vsq.space_allocated;
1609}
1610
1611static int dasd_eckd_logical_capacity(struct dasd_device *device)
1612{
1613 struct dasd_eckd_private *private = device->private;
1614
1615 return private->vsq.logical_capacity;
1616}
1617
9e12e54c
JH		 1618static void dasd_eckd_ext_pool_exhaust_work(struct work_struct *work)
1619{
1620 struct ext_pool_exhaust_work_data *data;
1621 struct dasd_device *device;
1622 struct dasd_device *base;
1623
1624 data = container_of(work, struct ext_pool_exhaust_work_data, worker);
1625 device = data->device;
1626 base = data->base;
1627
1628 if (!base)
1629 base = device;
1630 if (dasd_eckd_space_configured(base) != 0) {
1631 dasd_generic_space_avail(device);
1632 } else {
1633 dev_warn(&device->cdev->dev, "No space left in the extent pool\n");
1634 DBF_DEV_EVENT(DBF_WARNING, device, "%s", "out of space");
1635 }
1636
1637 dasd_put_device(device);
1638 kfree(data);
1639}
1640
1641static int dasd_eckd_ext_pool_exhaust(struct dasd_device *device,
1642 struct dasd_ccw_req *cqr)
1643{
1644 struct ext_pool_exhaust_work_data *data;
1645
1646 data = kzalloc(sizeof(*data), GFP_ATOMIC);
1647 if (!data)
1648 return -ENOMEM;
1649 INIT_WORK(&data->worker, dasd_eckd_ext_pool_exhaust_work);
1650 dasd_get_device(device);
1651 data->device = device;
1652
1653 if (cqr->block)
1654 data->base = cqr->block->base;
1655 else if (cqr->basedev)
1656 data->base = cqr->basedev;
1657 else
1658 data->base = NULL;
1659
1660 schedule_work(&data->worker);
1661
1662 return 0;
1663}
1664
c729696b
JH		 1665static void dasd_eckd_cpy_ext_pool_data(struct dasd_device *device,
1666 struct dasd_rssd_lcq *lcq)
1667{
1668 struct dasd_eckd_private *private = device->private;
1669 int pool_id = dasd_eckd_ext_pool_id(device);
1670 struct dasd_ext_pool_sum eps;
1671 int i;
1672
1673 for (i = 0; i < lcq->pool_count; i++) {
1674 eps = lcq->ext_pool_sum[i];
1675 if (eps.pool_id == pool_id) {
1676 memcpy(&private->eps, &eps,
1677 sizeof(struct dasd_ext_pool_sum));
1678 }
1679 }
1680}
1681
1682/* Read Extent Pool Information - Logical Configuration Query */
1683static int dasd_eckd_read_ext_pool_info(struct dasd_device *device)
1684{
1685 struct dasd_eckd_private *private = device->private;
1686 struct dasd_psf_prssd_data *prssdp;
1687 struct dasd_rssd_lcq *lcq;
1688 struct dasd_ccw_req *cqr;
1689 struct ccw1 *ccw;
1690 int rc;
1691
1692 /* This command cannot be executed on an alias device */
1693 if (private->uid.type == UA_BASE_PAV_ALIAS ||
1694 private->uid.type == UA_HYPER_PAV_ALIAS)
1695 return 0;
1696
1697 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 /* PSF + RSSD */,
1698 sizeof(*prssdp) + sizeof(*lcq), device, NULL);
1699 if (IS_ERR(cqr)) {
1700 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1701 "Could not allocate initialization request");
1702 return PTR_ERR(cqr);
1703 }
1704
1705 /* Prepare for Read Subsystem Data */
1706 prssdp = cqr->data;
1707 memset(prssdp, 0, sizeof(*prssdp));
1708 prssdp->order = PSF_ORDER_PRSSD;
1709 prssdp->suborder = PSF_SUBORDER_LCQ; /* Logical Configuration Query */
1710
1711 ccw = cqr->cpaddr;
1712 ccw->cmd_code = DASD_ECKD_CCW_PSF;
1713 ccw->count = sizeof(*prssdp);
1714 ccw->flags |= CCW_FLAG_CC;
1715 ccw->cda = (__u32)(addr_t)prssdp;
1716
1717 lcq = (struct dasd_rssd_lcq *)(prssdp + 1);
1718 memset(lcq, 0, sizeof(*lcq));
1719
1720 ccw++;
1721 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
1722 ccw->count = sizeof(*lcq);
1723 ccw->flags |= CCW_FLAG_SLI;
1724 ccw->cda = (__u32)(addr_t)lcq;
1725
1726 cqr->buildclk = get_tod_clock();
1727 cqr->status = DASD_CQR_FILLED;
1728 cqr->startdev = device;
1729 cqr->memdev = device;
1730 cqr->block = NULL;
1731 cqr->retries = 256;
1732 cqr->expires = device->default_expires * HZ;
1733 /* The command might not be supported. Suppress the error output */
1734 __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags);
1735
1736 rc = dasd_sleep_on_interruptible(cqr);
1737 if (rc == 0) {
1738 dasd_eckd_cpy_ext_pool_data(device, lcq);
1739 } else {
dd454839
JH		 1740 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1741 "Reading the logical configuration failed with rc=%d", rc);
c729696b
JH		 1742 }
1743
1744 dasd_sfree_request(cqr, cqr->memdev);
1745
1746 return rc;
1747}
1748
1749/*
1750 * Depending on the device type, the extent size is specified either as
1751 * cylinders per extent (CKD) or size per extent (FBA)
1752 * A 1GB size corresponds to 1113cyl, and 16MB to 21cyl.
1753 */
1754static int dasd_eckd_ext_size(struct dasd_device *device)
1755{
1756 struct dasd_eckd_private *private = device->private;
1757 struct dasd_ext_pool_sum eps = private->eps;
1758
1759 if (!eps.flags.extent_size_valid)
1760 return 0;
1761 if (eps.extent_size.size_1G)
1762 return 1113;
1763 if (eps.extent_size.size_16M)
1764 return 21;
1765
1766 return 0;
1767}
1768
1769static int dasd_eckd_ext_pool_warn_thrshld(struct dasd_device *device)
1770{
1771 struct dasd_eckd_private *private = device->private;
1772
1773 return private->eps.warn_thrshld;
1774}
1775
1776static int dasd_eckd_ext_pool_cap_at_warnlevel(struct dasd_device *device)
1777{
1778 struct dasd_eckd_private *private = device->private;
1779
1780 return private->eps.flags.capacity_at_warnlevel;
1781}
1782
1783/*
1784 * Extent Pool out of space
1785 */
1786static int dasd_eckd_ext_pool_oos(struct dasd_device *device)
1787{
1788 struct dasd_eckd_private *private = device->private;
1789
1790 return private->eps.flags.pool_oos;
1791}
8e09f215 1792
40545573
HH		 1793/*
1794 * Build CP for Perform Subsystem Function - SSC.
1795 */
f3eb5384
SW		 1796static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device,
1797 int enable_pav)
40545573 1798{
8e09f215
SW		 1799 struct dasd_ccw_req *cqr;
1800 struct dasd_psf_ssc_data *psf_ssc_data;
1801 struct ccw1 *ccw;
40545573 1802
68b781fe 1803 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ ,
40545573 1804 sizeof(struct dasd_psf_ssc_data),
c5205f2f 1805 device, NULL);
40545573 1806
8e09f215 1807 if (IS_ERR(cqr)) {
fc19f381 1808 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
40545573 1809 "Could not allocate PSF-SSC request");
8e09f215
SW		 1810 return cqr;
1811 }
1812 psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data;
1813 psf_ssc_data->order = PSF_ORDER_SSC;
626350b6 1814 psf_ssc_data->suborder = 0xc0;
f3eb5384 1815 if (enable_pav) {
626350b6 1816 psf_ssc_data->suborder |= 0x08;
f3eb5384
SW		 1817 psf_ssc_data->reserved[0] = 0x88;
1818 }
8e09f215
SW		 1819 ccw = cqr->cpaddr;
1820 ccw->cmd_code = DASD_ECKD_CCW_PSF;
1821 ccw->cda = (__u32)(addr_t)psf_ssc_data;
1822 ccw->count = 66;
1823
1824 cqr->startdev = device;
1825 cqr->memdev = device;
1826 cqr->block = NULL;
eb6e199b 1827 cqr->retries = 256;
8e09f215 1828 cqr->expires = 10*HZ;
1aae0560 1829 cqr->buildclk = get_tod_clock();
8e09f215
SW		 1830 cqr->status = DASD_CQR_FILLED;
1831 return cqr;
40545573
HH		 1832}
1833
1834/*
1835 * Perform Subsystem Function.
1836 * It is necessary to trigger CIO for channel revalidation since this
1837 * call might change behaviour of DASD devices.
1838 */
1839static int
12d7b107
SH		 1840dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav,
1841 unsigned long flags)
40545573 1842{
8e09f215
SW		 1843 struct dasd_ccw_req *cqr;
1844 int rc;
1845
f3eb5384 1846 cqr = dasd_eckd_build_psf_ssc(device, enable_pav);
8e09f215
SW		 1847 if (IS_ERR(cqr))
1848 return PTR_ERR(cqr);
1849
12d7b107
SH		 1850 /*
1851 * set flags e.g. turn on failfast, to prevent blocking
1852 * the calling function should handle failed requests
1853 */
1854 cqr->flags |= flags;
1855
8e09f215
SW		 1856 rc = dasd_sleep_on(cqr);
1857 if (!rc)
1858 /* trigger CIO to reprobe devices */
1859 css_schedule_reprobe();
12d7b107
SH		 1860 else if (cqr->intrc == -EAGAIN)
1861 rc = -EAGAIN;
1862
8e09f215
SW		 1863 dasd_sfree_request(cqr, cqr->memdev);
1864 return rc;
40545573
HH		 1865}
1866
1867/*
1868 * Valide storage server of current device.
1869 */
12d7b107
SH		 1870static int dasd_eckd_validate_server(struct dasd_device *device,
1871 unsigned long flags)
40545573 1872{
543691a4
SO		 1873 struct dasd_eckd_private *private = device->private;
1874 int enable_pav, rc;
40545573 1875
f9f8d02f
SH		 1876 if (private->uid.type == UA_BASE_PAV_ALIAS ||
1877 private->uid.type == UA_HYPER_PAV_ALIAS)
12d7b107 1878 return 0;
40545573 1879 if (dasd_nopav || MACHINE_IS_VM)
f3eb5384
SW		 1880 enable_pav = 0;
1881 else
1882 enable_pav = 1;
12d7b107 1883 rc = dasd_eckd_psf_ssc(device, enable_pav, flags);
eb6e199b 1884
8e79a441
HH		 1885 /* may be requested feature is not available on server,
1886 * therefore just report error and go ahead */
b8ed5dd5
SH		 1887 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x "
1888 "returned rc=%d", private->uid.ssid, rc);
12d7b107 1889 return rc;
40545573
HH		 1890}
1891
f1633031
SH		 1892/*
1893 * worker to do a validate server in case of a lost pathgroup
1894 */
1895static void dasd_eckd_do_validate_server(struct work_struct *work)
1896{
1897 struct dasd_device *device = container_of(work, struct dasd_device,
1898 kick_validate);
ea4da6ea
SH		 1899 unsigned long flags = 0;
1900
1901 set_bit(DASD_CQR_FLAGS_FAILFAST, &flags);
1902 if (dasd_eckd_validate_server(device, flags)
12d7b107
SH		 1903 == -EAGAIN) {
1904 /* schedule worker again if failed */
1905 schedule_work(&device->kick_validate);
1906 return;
1907 }
1908
f1633031
SH		 1909 dasd_put_device(device);
1910}
1911
1912static void dasd_eckd_kick_validate_server(struct dasd_device *device)
1913{
1914 dasd_get_device(device);
25e2cf1c
SH		 1915 /* exit if device not online or in offline processing */
1916 if (test_bit(DASD_FLAG_OFFLINE, &device->flags) ||
1917 device->state < DASD_STATE_ONLINE) {
1918 dasd_put_device(device);
1919 return;
1920 }
f1633031 1921 /* queue call to do_validate_server to the kernel event daemon. */
f2608cd4
SH		 1922 if (!schedule_work(&device->kick_validate))
1923 dasd_put_device(device);
f1633031
SH		 1924}
1925
3d052595
HH		 1926/*
1927 * Check device characteristics.
1928 * If the device is accessible using ECKD discipline, the device is enabled.
1929 */
1da177e4
LT		 1930static int
1931dasd_eckd_check_characteristics(struct dasd_device *device)
1932{
543691a4 1933 struct dasd_eckd_private *private = device->private;
8e09f215 1934 struct dasd_block *block;
2dedf0d9 1935 struct dasd_uid temp_uid;
f9f8d02f 1936 int rc, i;
33b62a30 1937 int readonly;
7c8faa86 1938 unsigned long value;
1da177e4 1939
f1633031
SH		 1940 /* setup work queue for validate server*/
1941 INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server);
59a9ed5f
SH		 1942 /* setup work queue for summary unit check */
1943 INIT_WORK(&device->suc_work, dasd_alias_handle_summary_unit_check);
f1633031 1944
454e1fa1
PO		 1945 if (!ccw_device_is_pathgroup(device->cdev)) {
1946 dev_warn(&device->cdev->dev,
1947 "A channel path group could not be established\n");
1948 return -EIO;
1949 }
1950 if (!ccw_device_is_multipath(device->cdev)) {
1951 dev_info(&device->cdev->dev,
1952 "The DASD is not operating in multipath mode\n");
1953 }
92636b15
SO		 1954 if (!private) {
1955 private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA);
1956 if (!private) {
fc19f381
SH		 1957 dev_warn(&device->cdev->dev,
1958 "Allocating memory for private DASD data "
1959 "failed\n");
1da177e4
LT		 1960 return -ENOMEM;
1961 }
543691a4 1962 device->private = private;
92636b15
SO		 1963 } else {
1964 memset(private, 0, sizeof(*private));
1da177e4
LT		 1965 }
1966 /* Invalidate status of initial analysis. */
1967 private->init_cqr_status = -1;
1968 /* Set default cache operations. */
1969 private->attrib.operation = DASD_NORMAL_CACHE;
1970 private->attrib.nr_cyl = 0;
1971
40545573
HH		 1972 /* Read Configuration Data */
1973 rc = dasd_eckd_read_conf(device);
1974 if (rc)
8e09f215 1975 goto out_err1;
40545573 1976
a521b048 1977 /* set some default values */
7c8faa86 1978 device->default_expires = DASD_EXPIRES;
1f1ee9ad 1979 device->default_retries = DASD_RETRIES;
a521b048
SH		 1980 device->path_thrhld = DASD_ECKD_PATH_THRHLD;
1981 device->path_interval = DASD_ECKD_PATH_INTERVAL;
1f1ee9ad 1982
7c8faa86
SH		 1983 if (private->gneq) {
1984 value = 1;
1985 for (i = 0; i < private->gneq->timeout.value; i++)
1986 value = 10 * value;
1987 value = value * private->gneq->timeout.number;
1988 /* do not accept useless values */
1989 if (value != 0 && value <= DASD_EXPIRES_MAX)
1990 device->default_expires = value;
1991 }
1992
2dedf0d9
SH		 1993 dasd_eckd_get_uid(device, &temp_uid);
1994 if (temp_uid.type == UA_BASE_DEVICE) {
8e09f215
SW		 1995 block = dasd_alloc_block();
1996 if (IS_ERR(block)) {
b8ed5dd5
SH		 1997 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1998 "could not allocate dasd "
1999 "block structure");
8e09f215
SW		 2000 rc = PTR_ERR(block);
2001 goto out_err1;
2002 }
2003 device->block = block;
2004 block->base = device;
2005 }
2006
f9f8d02f
SH		 2007 /* register lcu with alias handling, enable PAV */
2008 rc = dasd_alias_make_device_known_to_lcu(device);
2009 if (rc)
8e09f215 2010 goto out_err2;
f9f8d02f 2011
12d7b107 2012 dasd_eckd_validate_server(device, 0);
f4ac1d02
SW		 2013
2014 /* device may report different configuration data after LCU setup */
2015 rc = dasd_eckd_read_conf(device);
2016 if (rc)
2017 goto out_err3;
8e09f215
SW		 2018
2019 /* Read Feature Codes */
68d1e5f0 2020 dasd_eckd_read_features(device);
40545573 2021
c729696b 2022 /* Read Volume Information */
dd454839 2023 dasd_eckd_read_vol_info(device);
c729696b
JH		 2024
2025 /* Read Extent Pool Information */
dd454839 2026 dasd_eckd_read_ext_pool_info(device);
c729696b 2027
1da177e4 2028 /* Read Device Characteristics */
68b781fe
SH		 2029 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
2030 &private->rdc_data, 64);
8e09f215 2031 if (rc) {
b8ed5dd5
SH		 2032 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
2033 "Read device characteristic failed, rc=%d", rc);
8e09f215
SW		 2034 goto out_err3;
2035 }
34cd551a
SH		 2036
2037 if ((device->features & DASD_FEATURE_USERAW) &&
2038 !(private->rdc_data.facilities.RT_in_LR)) {
2039 dev_err(&device->cdev->dev, "The storage server does not "
2040 "support raw-track access\n");
2041 rc = -EINVAL;
2042 goto out_err3;
2043 }
2044
817f2c84 2045 /* find the valid cylinder size */
b44b0ab3
SW		 2046 if (private->rdc_data.no_cyl == LV_COMPAT_CYL &&
2047 private->rdc_data.long_no_cyl)
2048 private->real_cyl = private->rdc_data.long_no_cyl;
2049 else
2050 private->real_cyl = private->rdc_data.no_cyl;
2051
ef19298b
SW		 2052 private->fcx_max_data = get_fcx_max_data(device);
2053
33b62a30
SW		 2054 readonly = dasd_device_is_ro(device);
2055 if (readonly)
2056 set_bit(DASD_FLAG_DEVICE_RO, &device->flags);
2057
fc19f381 2058 dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) "
33b62a30 2059 "with %d cylinders, %d heads, %d sectors%s\n",
fc19f381
SH		 2060 private->rdc_data.dev_type,
2061 private->rdc_data.dev_model,
2062 private->rdc_data.cu_type,
2063 private->rdc_data.cu_model.model,
92636b15 2064 private->real_cyl,
fc19f381 2065 private->rdc_data.trk_per_cyl,
33b62a30
SW		 2066 private->rdc_data.sec_per_trk,
2067 readonly ? ", read-only device" : "");
8e09f215
SW		 2068 return 0;
2069
2070out_err3:
2071 dasd_alias_disconnect_device_from_lcu(device);
2072out_err2:
2073 dasd_free_block(device->block);
2074 device->block = NULL;
2075out_err1:
4abb08c2 2076 kfree(private->conf_data);
8e09f215
SW		 2077 kfree(device->private);
2078 device->private = NULL;
3d052595 2079 return rc;
1da177e4
LT		 2080}
2081
8e09f215
SW		 2082static void dasd_eckd_uncheck_device(struct dasd_device *device)
2083{
543691a4 2084 struct dasd_eckd_private *private = device->private;
b179b037 2085 int i;
4abb08c2 2086
7c6553d4
SH		 2087 if (!private)
2088 return;
2089
8e09f215 2090 dasd_alias_disconnect_device_from_lcu(device);
4abb08c2
SW		 2091 private->ned = NULL;
2092 private->sneq = NULL;
2093 private->vdsneq = NULL;
2094 private->gneq = NULL;
2095 private->conf_len = 0;
b179b037 2096 for (i = 0; i < 8; i++) {
c9346151
SH		 2097 kfree(device->path[i].conf_data);
2098 if ((__u8 *)device->path[i].conf_data ==
b179b037
SH		 2099 private->conf_data) {
2100 private->conf_data = NULL;
2101 private->conf_len = 0;
2102 }
c9346151 2103 device->path[i].conf_data = NULL;
a521b048
SH		 2104 device->path[i].cssid = 0;
2105 device->path[i].ssid = 0;
2106 device->path[i].chpid = 0;
b179b037 2107 }
4abb08c2
SW		 2108 kfree(private->conf_data);
2109 private->conf_data = NULL;
8e09f215
SW		 2110}
2111
1da177e4
LT		 2112static struct dasd_ccw_req *
2113dasd_eckd_analysis_ccw(struct dasd_device *device)
2114{
543691a4 2115 struct dasd_eckd_private *private = device->private;
1da177e4
LT		 2116 struct eckd_count *count_data;
2117 struct LO_eckd_data *LO_data;
2118 struct dasd_ccw_req *cqr;
2119 struct ccw1 *ccw;
2120 int cplength, datasize;
2121 int i;
2122
1da177e4
LT		 2123 cplength = 8;
2124 datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data);
c5205f2f
SO		 2125 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device,
2126 NULL);
1da177e4
LT		 2127 if (IS_ERR(cqr))
2128 return cqr;
2129 ccw = cqr->cpaddr;
ce6915f5
JH		 2130 /* Define extent for the first 2 tracks. */
2131 define_extent(ccw++, cqr->data, 0, 1,
45f186be 2132 DASD_ECKD_CCW_READ_COUNT, device, 0);
8e09f215 2133 LO_data = cqr->data + sizeof(struct DE_eckd_data);
1da177e4
LT		 2134 /* Locate record for the first 4 records on track 0. */
2135 ccw[-1].flags |= CCW_FLAG_CC;
2136 locate_record(ccw++, LO_data++, 0, 0, 4,
2137 DASD_ECKD_CCW_READ_COUNT, device, 0);
2138
2139 count_data = private->count_area;
2140 for (i = 0; i < 4; i++) {
2141 ccw[-1].flags |= CCW_FLAG_CC;
2142 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
2143 ccw->flags = 0;
2144 ccw->count = 8;
2145 ccw->cda = (__u32)(addr_t) count_data;
2146 ccw++;
2147 count_data++;
2148 }
2149
ce6915f5 2150 /* Locate record for the first record on track 1. */
1da177e4 2151 ccw[-1].flags |= CCW_FLAG_CC;
ce6915f5 2152 locate_record(ccw++, LO_data++, 1, 0, 1,
1da177e4
LT		 2153 DASD_ECKD_CCW_READ_COUNT, device, 0);
2154 /* Read count ccw. */
2155 ccw[-1].flags |= CCW_FLAG_CC;
2156 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
2157 ccw->flags = 0;
2158 ccw->count = 8;
2159 ccw->cda = (__u32)(addr_t) count_data;
2160
8e09f215
SW		 2161 cqr->block = NULL;
2162 cqr->startdev = device;
2163 cqr->memdev = device;
eb6e199b 2164 cqr->retries = 255;
1aae0560 2165 cqr->buildclk = get_tod_clock();
1da177e4 2166 cqr->status = DASD_CQR_FILLED;
9e12e54c
JH		 2167 /* Set flags to suppress output for expected errors */
2168 set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags);
2169
1da177e4
LT		 2170 return cqr;
2171}
2172
eb6e199b
SW		 2173/* differentiate between 'no record found' and any other error */
2174static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr)
2175{
2176 char *sense;
2177 if (init_cqr->status == DASD_CQR_DONE)
2178 return INIT_CQR_OK;
2179 else if (init_cqr->status == DASD_CQR_NEED_ERP ||
2180 init_cqr->status == DASD_CQR_FAILED) {
2181 sense = dasd_get_sense(&init_cqr->irb);
2182 if (sense && (sense[1] & SNS1_NO_REC_FOUND))
2183 return INIT_CQR_UNFORMATTED;
2184 else
2185 return INIT_CQR_ERROR;
2186 } else
2187 return INIT_CQR_ERROR;
2188}
2189
1da177e4
LT		 2190/*
2191 * This is the callback function for the init_analysis cqr. It saves
2192 * the status of the initial analysis ccw before it frees it and kicks
2193 * the device to continue the startup sequence. This will call
2194 * dasd_eckd_do_analysis again (if the devices has not been marked
2195 * for deletion in the meantime).
2196 */
eb6e199b
SW		 2197static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr,
2198 void *data)
1da177e4 2199{
543691a4
SO		 2200 struct dasd_device *device = init_cqr->startdev;
2201 struct dasd_eckd_private *private = device->private;
1da177e4 2202
eb6e199b 2203 private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr);
1da177e4
LT		 2204 dasd_sfree_request(init_cqr, device);
2205 dasd_kick_device(device);
2206}
2207
eb6e199b 2208static int dasd_eckd_start_analysis(struct dasd_block *block)
1da177e4 2209{
1da177e4
LT		 2210 struct dasd_ccw_req *init_cqr;
2211
8e09f215 2212 init_cqr = dasd_eckd_analysis_ccw(block->base);
1da177e4
LT		 2213 if (IS_ERR(init_cqr))
2214 return PTR_ERR(init_cqr);
2215 init_cqr->callback = dasd_eckd_analysis_callback;
2216 init_cqr->callback_data = NULL;
2217 init_cqr->expires = 5*HZ;
eb6e199b
SW		 2218 /* first try without ERP, so we can later handle unformatted
2219 * devices as special case
2220 */
2221 clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags);
2222 init_cqr->retries = 0;
1da177e4
LT		 2223 dasd_add_request_head(init_cqr);
2224 return -EAGAIN;
2225}
2226
eb6e199b 2227static int dasd_eckd_end_analysis(struct dasd_block *block)
1da177e4 2228{
543691a4
SO		 2229 struct dasd_device *device = block->base;
2230 struct dasd_eckd_private *private = device->private;
1da177e4
LT		 2231 struct eckd_count *count_area;
2232 unsigned int sb, blk_per_trk;
2233 int status, i;
eb6e199b 2234 struct dasd_ccw_req *init_cqr;
1da177e4 2235
1da177e4
LT		 2236 status = private->init_cqr_status;
2237 private->init_cqr_status = -1;
eb6e199b
SW		 2238 if (status == INIT_CQR_ERROR) {
2239 /* try again, this time with full ERP */
2240 init_cqr = dasd_eckd_analysis_ccw(device);
2241 dasd_sleep_on(init_cqr);
2242 status = dasd_eckd_analysis_evaluation(init_cqr);
2243 dasd_sfree_request(init_cqr, device);
2244 }
2245
e4dbb0f2
SH		 2246 if (device->features & DASD_FEATURE_USERAW) {
2247 block->bp_block = DASD_RAW_BLOCKSIZE;
2248 blk_per_trk = DASD_RAW_BLOCK_PER_TRACK;
2249 block->s2b_shift = 3;
2250 goto raw;
2251 }
2252
eb6e199b
SW		 2253 if (status == INIT_CQR_UNFORMATTED) {
2254 dev_warn(&device->cdev->dev, "The DASD is not formatted\n");
1da177e4 2255 return -EMEDIUMTYPE;
eb6e199b
SW		 2256 } else if (status == INIT_CQR_ERROR) {
2257 dev_err(&device->cdev->dev,
2258 "Detecting the DASD disk layout failed because "
2259 "of an I/O error\n");
2260 return -EIO;
1da177e4
LT		 2261 }
2262
2263 private->uses_cdl = 1;
1da177e4
LT		 2264 /* Check Track 0 for Compatible Disk Layout */
2265 count_area = NULL;
2266 for (i = 0; i < 3; i++) {
2267 if (private->count_area[i].kl != 4 ||
3bc9fef9
SH		 2268 private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 ||
2269 private->count_area[i].cyl != 0 ||
2270 private->count_area[i].head != count_area_head[i] ||
2271 private->count_area[i].record != count_area_rec[i]) {
1da177e4
LT		 2272 private->uses_cdl = 0;
2273 break;
2274 }
2275 }
2276 if (i == 3)
ce6915f5 2277 count_area = &private->count_area[3];
1da177e4
LT		 2278
2279 if (private->uses_cdl == 0) {
2280 for (i = 0; i < 5; i++) {
2281 if ((private->count_area[i].kl != 0) ||
2282 (private->count_area[i].dl !=
3bc9fef9
SH		 2283 private->count_area[0].dl) ||
2284 private->count_area[i].cyl != 0 ||
2285 private->count_area[i].head != count_area_head[i] ||
2286 private->count_area[i].record != count_area_rec[i])
1da177e4
LT		 2287 break;
2288 }
2289 if (i == 5)
2290 count_area = &private->count_area[0];
2291 } else {
2292 if (private->count_area[3].record == 1)
fc19f381
SH		 2293 dev_warn(&device->cdev->dev,
2294 "Track 0 has no records following the VTOC\n");
1da177e4 2295 }
e4dbb0f2 2296
1da177e4
LT		 2297 if (count_area != NULL && count_area->kl == 0) {
2298 /* we found notthing violating our disk layout */
2299 if (dasd_check_blocksize(count_area->dl) == 0)
8e09f215 2300 block->bp_block = count_area->dl;
1da177e4 2301 }
8e09f215 2302 if (block->bp_block == 0) {
fc19f381
SH		 2303 dev_warn(&device->cdev->dev,
2304 "The disk layout of the DASD is not supported\n");
1da177e4
LT		 2305 return -EMEDIUMTYPE;
2306 }
8e09f215
SW		 2307 block->s2b_shift = 0; /* bits to shift 512 to get a block */
2308 for (sb = 512; sb < block->bp_block; sb = sb << 1)
2309 block->s2b_shift++;
1da177e4 2310
8e09f215 2311 blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block);
e4dbb0f2
SH		 2312
2313raw:
2cc9637c 2314 block->blocks = ((unsigned long) private->real_cyl *
1da177e4
LT		 2315 private->rdc_data.trk_per_cyl *
2316 blk_per_trk);
2317
fc19f381 2318 dev_info(&device->cdev->dev,
2cc9637c 2319 "DASD with %u KB/block, %lu KB total size, %u KB/track, "
fc19f381 2320 "%s\n", (block->bp_block >> 10),
2cc9637c 2321 (((unsigned long) private->real_cyl *
fc19f381
SH		 2322 private->rdc_data.trk_per_cyl *
2323 blk_per_trk * (block->bp_block >> 9)) >> 1),
2324 ((blk_per_trk * block->bp_block) >> 10),
2325 private->uses_cdl ?
2326 "compatible disk layout" : "linux disk layout");
1da177e4
LT		 2327
2328 return 0;
2329}
2330
8e09f215 2331static int dasd_eckd_do_analysis(struct dasd_block *block)
1da177e4 2332{
543691a4 2333 struct dasd_eckd_private *private = block->base->private;
1da177e4 2334
1da177e4 2335 if (private->init_cqr_status < 0)
8e09f215 2336 return dasd_eckd_start_analysis(block);
1da177e4 2337 else
8e09f215 2338 return dasd_eckd_end_analysis(block);
1da177e4
LT		 2339}
2340
d42e1712 2341static int dasd_eckd_basic_to_ready(struct dasd_device *device)
8e09f215
SW		 2342{
2343 return dasd_alias_add_device(device);
2344};
2345
2346static int dasd_eckd_online_to_ready(struct dasd_device *device)
2347{
669f3765
SH		 2348 if (cancel_work_sync(&device->reload_device))
2349 dasd_put_device(device);
2350 if (cancel_work_sync(&device->kick_validate))
2351 dasd_put_device(device);
2352
d42e1712
SH		 2353 return 0;
2354};
2355
daa991bf 2356static int dasd_eckd_basic_to_known(struct dasd_device *device)
d42e1712 2357{
8e09f215
SW		 2358 return dasd_alias_remove_device(device);
2359};
2360
1da177e4 2361static int
8e09f215 2362dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo)
1da177e4 2363{
543691a4 2364 struct dasd_eckd_private *private = block->base->private;
1da177e4 2365
8e09f215 2366 if (dasd_check_blocksize(block->bp_block) == 0) {
1da177e4 2367 geo->sectors = recs_per_track(&private->rdc_data,
8e09f215 2368 0, block->bp_block);
1da177e4
LT		 2369 }
2370 geo->cylinders = private->rdc_data.no_cyl;
2371 geo->heads = private->rdc_data.trk_per_cyl;
2372 return 0;
2373}
2374
8fd57520
JH		 2375/*
2376 * Build the TCW request for the format check
2377 */
2378static struct dasd_ccw_req *
2379dasd_eckd_build_check_tcw(struct dasd_device *base, struct format_data_t *fdata,
2380 int enable_pav, struct eckd_count *fmt_buffer,
2381 int rpt)
2382{
2383 struct dasd_eckd_private *start_priv;
2384 struct dasd_device *startdev = NULL;
2385 struct tidaw *last_tidaw = NULL;
2386 struct dasd_ccw_req *cqr;
2387 struct itcw *itcw;
2388 int itcw_size;
2389 int count;
2390 int rc;
2391 int i;
2392
2393 if (enable_pav)
2394 startdev = dasd_alias_get_start_dev(base);
2395
2396 if (!startdev)
2397 startdev = base;
2398
2399 start_priv = startdev->private;
2400
2401 count = rpt * (fdata->stop_unit - fdata->start_unit + 1);
2402
2403 /*
2404 * we're adding 'count' amount of tidaw to the itcw.
2405 * calculate the corresponding itcw_size
2406 */
2407 itcw_size = itcw_calc_size(0, count, 0);
2408
5e2b17e7 2409 cqr = dasd_fmalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev);
8fd57520
JH		 2410 if (IS_ERR(cqr))
2411 return cqr;
2412
2413 start_priv->count++;
2414
2415 itcw = itcw_init(cqr->data, itcw_size, ITCW_OP_READ, 0, count, 0);
2416 if (IS_ERR(itcw)) {
2417 rc = -EINVAL;
2418 goto out_err;
2419 }
2420
2421 cqr->cpaddr = itcw_get_tcw(itcw);
2422 rc = prepare_itcw(itcw, fdata->start_unit, fdata->stop_unit,
2423 DASD_ECKD_CCW_READ_COUNT_MT, base, startdev, 0, count,
2424 sizeof(struct eckd_count),
2425 count * sizeof(struct eckd_count), 0, rpt);
2426 if (rc)
2427 goto out_err;
2428
2429 for (i = 0; i < count; i++) {
2430 last_tidaw = itcw_add_tidaw(itcw, 0, fmt_buffer++,
2431 sizeof(struct eckd_count));
2432 if (IS_ERR(last_tidaw)) {
2433 rc = -EINVAL;
2434 goto out_err;
2435 }
2436 }
2437
2438 last_tidaw->flags |= TIDAW_FLAGS_LAST;
2439 itcw_finalize(itcw);
2440
2441 cqr->cpmode = 1;
2442 cqr->startdev = startdev;
2443 cqr->memdev = startdev;
2444 cqr->basedev = base;
2445 cqr->retries = startdev->default_retries;
2446 cqr->expires = startdev->default_expires * HZ;
2447 cqr->buildclk = get_tod_clock();
2448 cqr->status = DASD_CQR_FILLED;
2449 /* Set flags to suppress output for expected errors */
2450 set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags);
2451 set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags);
2452
2453 return cqr;
2454
2455out_err:
2456 dasd_sfree_request(cqr, startdev);
2457
2458 return ERR_PTR(rc);
2459}
2460
2461/*
2462 * Build the CCW request for the format check
2463 */
2464static struct dasd_ccw_req *
2465dasd_eckd_build_check(struct dasd_device *base, struct format_data_t *fdata,
2466 int enable_pav, struct eckd_count *fmt_buffer, int rpt)
2467{
2468 struct dasd_eckd_private *start_priv;
2469 struct dasd_eckd_private *base_priv;
2470 struct dasd_device *startdev = NULL;
2471 struct dasd_ccw_req *cqr;
2472 struct ccw1 *ccw;
2473 void *data;
2474 int cplength, datasize;
2475 int use_prefix;
2476 int count;
2477 int i;
2478
2479 if (enable_pav)
2480 startdev = dasd_alias_get_start_dev(base);
2481
2482 if (!startdev)
2483 startdev = base;
2484
2485 start_priv = startdev->private;
2486 base_priv = base->private;
2487
2488 count = rpt * (fdata->stop_unit - fdata->start_unit + 1);
2489
2490 use_prefix = base_priv->features.feature[8] & 0x01;
2491
2492 if (use_prefix) {
2493 cplength = 1;
2494 datasize = sizeof(struct PFX_eckd_data);
2495 } else {
2496 cplength = 2;
2497 datasize = sizeof(struct DE_eckd_data) +
2498 sizeof(struct LO_eckd_data);
2499 }
2500 cplength += count;
2501
5e2b17e7 2502 cqr = dasd_fmalloc_request(DASD_ECKD_MAGIC, cplength, datasize, startdev);
8fd57520
JH		 2503 if (IS_ERR(cqr))
2504 return cqr;
2505
2506 start_priv->count++;
2507 data = cqr->data;
2508 ccw = cqr->cpaddr;
2509
2510 if (use_prefix) {
2511 prefix_LRE(ccw++, data, fdata->start_unit, fdata->stop_unit,
2512 DASD_ECKD_CCW_READ_COUNT, base, startdev, 1, 0,
2513 count, 0, 0);
2514 } else {
2515 define_extent(ccw++, data, fdata->start_unit, fdata->stop_unit,
45f186be 2516 DASD_ECKD_CCW_READ_COUNT, startdev, 0);
8fd57520
JH		 2517
2518 data += sizeof(struct DE_eckd_data);
2519 ccw[-1].flags |= CCW_FLAG_CC;
2520
2521 locate_record(ccw++, data, fdata->start_unit, 0, count,
2522 DASD_ECKD_CCW_READ_COUNT, base, 0);
2523 }
2524
2525 for (i = 0; i < count; i++) {
2526 ccw[-1].flags |= CCW_FLAG_CC;
2527 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
2528 ccw->flags = CCW_FLAG_SLI;
2529 ccw->count = 8;
2530 ccw->cda = (__u32)(addr_t) fmt_buffer;
2531 ccw++;
2532 fmt_buffer++;
2533 }
2534
2535 cqr->startdev = startdev;
2536 cqr->memdev = startdev;
2537 cqr->basedev = base;
2538 cqr->retries = DASD_RETRIES;
2539 cqr->expires = startdev->default_expires * HZ;
2540 cqr->buildclk = get_tod_clock();
2541 cqr->status = DASD_CQR_FILLED;
2542 /* Set flags to suppress output for expected errors */
2543 set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags);
2544
2545 return cqr;
2546}
2547
1da177e4 2548static struct dasd_ccw_req *
5e2b17e7
JH		 2549dasd_eckd_build_format(struct dasd_device *base, struct dasd_device *startdev,
2550 struct format_data_t *fdata, int enable_pav)
1da177e4 2551{
d42e1712
SH		 2552 struct dasd_eckd_private *base_priv;
2553 struct dasd_eckd_private *start_priv;
1da177e4
LT		 2554 struct dasd_ccw_req *fcp;
2555 struct eckd_count *ect;
d42e1712 2556 struct ch_t address;
1da177e4
LT		 2557 struct ccw1 *ccw;
2558 void *data;
b44b0ab3 2559 int rpt;
1da177e4 2560 int cplength, datasize;
d42e1712 2561 int i, j;
f9a28f7b
JBJ		 2562 int intensity = 0;
2563 int r0_perm;
d42e1712 2564 int nr_tracks;
18d6624e 2565 int use_prefix;
1da177e4 2566
a94fa154 2567 if (enable_pav)
29b8dd9d
SH		 2568 startdev = dasd_alias_get_start_dev(base);
2569
d42e1712
SH		 2570 if (!startdev)
2571 startdev = base;
1da177e4 2572
543691a4
SO		 2573 start_priv = startdev->private;
2574 base_priv = base->private;
d42e1712
SH		 2575
2576 rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize);
2577
2578 nr_tracks = fdata->stop_unit - fdata->start_unit + 1;
1da177e4
LT		 2579
2580 /*
2581 * fdata->intensity is a bit string that tells us what to do:
2582 * Bit 0: write record zero
2583 * Bit 1: write home address, currently not supported
2584 * Bit 2: invalidate tracks
2585 * Bit 3: use OS/390 compatible disk layout (cdl)
f9a28f7b 2586 * Bit 4: do not allow storage subsystem to modify record zero
1da177e4
LT		 2587 * Only some bit combinations do make sense.
2588 */
f9a28f7b
JBJ		 2589 if (fdata->intensity & 0x10) {
2590 r0_perm = 0;
2591 intensity = fdata->intensity & ~0x10;
2592 } else {
2593 r0_perm = 1;
2594 intensity = fdata->intensity;
2595 }
d42e1712 2596
18d6624e
SH		 2597 use_prefix = base_priv->features.feature[8] & 0x01;
2598
f9a28f7b 2599 switch (intensity) {
1da177e4
LT		 2600 case 0x00: /* Normal format */
2601 case 0x08: /* Normal format, use cdl. */
d42e1712 2602 cplength = 2 + (rpt*nr_tracks);
18d6624e
SH		 2603 if (use_prefix)
2604 datasize = sizeof(struct PFX_eckd_data) +
2605 sizeof(struct LO_eckd_data) +
2606 rpt * nr_tracks * sizeof(struct eckd_count);
2607 else
2608 datasize = sizeof(struct DE_eckd_data) +
2609 sizeof(struct LO_eckd_data) +
2610 rpt * nr_tracks * sizeof(struct eckd_count);
1da177e4
LT		 2611 break;
2612 case 0x01: /* Write record zero and format track. */
2613 case 0x09: /* Write record zero and format track, use cdl. */
d42e1712 2614 cplength = 2 + rpt * nr_tracks;
18d6624e
SH		 2615 if (use_prefix)
2616 datasize = sizeof(struct PFX_eckd_data) +
2617 sizeof(struct LO_eckd_data) +
2618 sizeof(struct eckd_count) +
2619 rpt * nr_tracks * sizeof(struct eckd_count);
2620 else
2621 datasize = sizeof(struct DE_eckd_data) +
2622 sizeof(struct LO_eckd_data) +
2623 sizeof(struct eckd_count) +
2624 rpt * nr_tracks * sizeof(struct eckd_count);
1da177e4
LT		 2625 break;
2626 case 0x04: /* Invalidate track. */
2627 case 0x0c: /* Invalidate track, use cdl. */
2628 cplength = 3;
18d6624e
SH		 2629 if (use_prefix)
2630 datasize = sizeof(struct PFX_eckd_data) +
2631 sizeof(struct LO_eckd_data) +
2632 sizeof(struct eckd_count);
2633 else
2634 datasize = sizeof(struct DE_eckd_data) +
2635 sizeof(struct LO_eckd_data) +
2636 sizeof(struct eckd_count);
1da177e4
LT		 2637 break;
2638 default:
d42e1712
SH		 2639 dev_warn(&startdev->cdev->dev,
2640 "An I/O control call used incorrect flags 0x%x\n",
2641 fdata->intensity);
1da177e4
LT		 2642 return ERR_PTR(-EINVAL);
2643 }
5e2b17e7
JH		 2644
2645 fcp = dasd_fmalloc_request(DASD_ECKD_MAGIC, cplength, datasize, startdev);
1da177e4
LT		 2646 if (IS_ERR(fcp))
2647 return fcp;
2648
d42e1712 2649 start_priv->count++;
1da177e4
LT		 2650 data = fcp->data;
2651 ccw = fcp->cpaddr;
2652
f9a28f7b 2653 switch (intensity & ~0x08) {
1da177e4 2654 case 0x00: /* Normal format. */
18d6624e
SH		 2655 if (use_prefix) {
2656 prefix(ccw++, (struct PFX_eckd_data *) data,
2657 fdata->start_unit, fdata->stop_unit,
2658 DASD_ECKD_CCW_WRITE_CKD, base, startdev);
2659 /* grant subsystem permission to format R0 */
2660 if (r0_perm)
2661 ((struct PFX_eckd_data *)data)
2662 ->define_extent.ga_extended |= 0x04;
2663 data += sizeof(struct PFX_eckd_data);
2664 } else {
2665 define_extent(ccw++, (struct DE_eckd_data *) data,
2666 fdata->start_unit, fdata->stop_unit,
45f186be 2667 DASD_ECKD_CCW_WRITE_CKD, startdev, 0);
18d6624e
SH		 2668 /* grant subsystem permission to format R0 */
2669 if (r0_perm)
2670 ((struct DE_eckd_data *) data)
2671 ->ga_extended |= 0x04;
2672 data += sizeof(struct DE_eckd_data);
2673 }
1da177e4
LT		 2674 ccw[-1].flags |= CCW_FLAG_CC;
2675 locate_record(ccw++, (struct LO_eckd_data *) data,
d42e1712
SH		 2676 fdata->start_unit, 0, rpt*nr_tracks,
2677 DASD_ECKD_CCW_WRITE_CKD, base,
1da177e4
LT		 2678 fdata->blksize);
2679 data += sizeof(struct LO_eckd_data);
2680 break;
2681 case 0x01: /* Write record zero + format track. */
18d6624e
SH		 2682 if (use_prefix) {
2683 prefix(ccw++, (struct PFX_eckd_data *) data,
2684 fdata->start_unit, fdata->stop_unit,
2685 DASD_ECKD_CCW_WRITE_RECORD_ZERO,
2686 base, startdev);
2687 data += sizeof(struct PFX_eckd_data);
2688 } else {
2689 define_extent(ccw++, (struct DE_eckd_data *) data,
2690 fdata->start_unit, fdata->stop_unit,
45f186be 2691 DASD_ECKD_CCW_WRITE_RECORD_ZERO, startdev, 0);
18d6624e
SH		 2692 data += sizeof(struct DE_eckd_data);
2693 }
1da177e4
LT		 2694 ccw[-1].flags |= CCW_FLAG_CC;
2695 locate_record(ccw++, (struct LO_eckd_data *) data,
d42e1712
SH		 2696 fdata->start_unit, 0, rpt * nr_tracks + 1,
2697 DASD_ECKD_CCW_WRITE_RECORD_ZERO, base,
2698 base->block->bp_block);
1da177e4
LT		 2699 data += sizeof(struct LO_eckd_data);
2700 break;
2701 case 0x04: /* Invalidate track. */
18d6624e
SH		 2702 if (use_prefix) {
2703 prefix(ccw++, (struct PFX_eckd_data *) data,
2704 fdata->start_unit, fdata->stop_unit,
2705 DASD_ECKD_CCW_WRITE_CKD, base, startdev);
2706 data += sizeof(struct PFX_eckd_data);
2707 } else {
2708 define_extent(ccw++, (struct DE_eckd_data *) data,
2709 fdata->start_unit, fdata->stop_unit,
45f186be 2710 DASD_ECKD_CCW_WRITE_CKD, startdev, 0);
18d6624e
SH		 2711 data += sizeof(struct DE_eckd_data);
2712 }
1da177e4
LT		 2713 ccw[-1].flags |= CCW_FLAG_CC;
2714 locate_record(ccw++, (struct LO_eckd_data *) data,
2715 fdata->start_unit, 0, 1,
d42e1712 2716 DASD_ECKD_CCW_WRITE_CKD, base, 8);
1da177e4
LT		 2717 data += sizeof(struct LO_eckd_data);
2718 break;
2719 }
d42e1712
SH		 2720
2721 for (j = 0; j < nr_tracks; j++) {
2722 /* calculate cylinder and head for the current track */
2723 set_ch_t(&address,
2724 (fdata->start_unit + j) /
2725 base_priv->rdc_data.trk_per_cyl,
2726 (fdata->start_unit + j) %
2727 base_priv->rdc_data.trk_per_cyl);
2728 if (intensity & 0x01) { /* write record zero */
1da177e4
LT		 2729 ect = (struct eckd_count *) data;
2730 data += sizeof(struct eckd_count);
b44b0ab3
SW		 2731 ect->cyl = address.cyl;
2732 ect->head = address.head;
d42e1712 2733 ect->record = 0;
1da177e4 2734 ect->kl = 0;
d42e1712 2735 ect->dl = 8;
1da177e4 2736 ccw[-1].flags |= CCW_FLAG_CC;
d42e1712 2737 ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO;
1da177e4
LT		 2738 ccw->flags = CCW_FLAG_SLI;
2739 ccw->count = 8;
2740 ccw->cda = (__u32)(addr_t) ect;
2741 ccw++;
2742 }
d42e1712
SH		 2743 if ((intensity & ~0x08) & 0x04) { /* erase track */
2744 ect = (struct eckd_count *) data;
2745 data += sizeof(struct eckd_count);
2746 ect->cyl = address.cyl;
2747 ect->head = address.head;
2748 ect->record = 1;
2749 ect->kl = 0;
2750 ect->dl = 0;
2751 ccw[-1].flags |= CCW_FLAG_CC;
2752 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD;
2753 ccw->flags = CCW_FLAG_SLI;
2754 ccw->count = 8;
2755 ccw->cda = (__u32)(addr_t) ect;
2756 } else { /* write remaining records */
2757 for (i = 0; i < rpt; i++) {
2758 ect = (struct eckd_count *) data;
2759 data += sizeof(struct eckd_count);
2760 ect->cyl = address.cyl;
2761 ect->head = address.head;
2762 ect->record = i + 1;
2763 ect->kl = 0;
2764 ect->dl = fdata->blksize;
2765 /*
2766 * Check for special tracks 0-1
2767 * when formatting CDL
2768 */
2769 if ((intensity & 0x08) &&
46d1c03c 2770 address.cyl == 0 && address.head == 0) {
d42e1712
SH		 2771 if (i < 3) {
2772 ect->kl = 4;
2773 ect->dl = sizes_trk0[i] - 4;
2774 }
2775 }
2776 if ((intensity & 0x08) &&
46d1c03c 2777 address.cyl == 0 && address.head == 1) {
d42e1712
SH		 2778 ect->kl = 44;
2779 ect->dl = LABEL_SIZE - 44;
2780 }
2781 ccw[-1].flags |= CCW_FLAG_CC;
2782 if (i != 0 || j == 0)
2783 ccw->cmd_code =
2784 DASD_ECKD_CCW_WRITE_CKD;
2785 else
2786 ccw->cmd_code =
2787 DASD_ECKD_CCW_WRITE_CKD_MT;
2788 ccw->flags = CCW_FLAG_SLI;
2789 ccw->count = 8;
ba21d0ea
SH		 2790 ccw->cda = (__u32)(addr_t) ect;
2791 ccw++;
d42e1712
SH		 2792 }
2793 }
1da177e4 2794 }
d42e1712
SH		 2795
2796 fcp->startdev = startdev;
2797 fcp->memdev = startdev;
29b8dd9d 2798 fcp->basedev = base;
eb6e199b 2799 fcp->retries = 256;
d42e1712 2800 fcp->expires = startdev->default_expires * HZ;
1aae0560 2801 fcp->buildclk = get_tod_clock();
1da177e4 2802 fcp->status = DASD_CQR_FILLED;
d42e1712 2803
1da177e4
LT		 2804 return fcp;
2805}
2806
570d237c
JH		 2807/*
2808 * Wrapper function to build a CCW request depending on input data
2809 */
2810static struct dasd_ccw_req *
2811dasd_eckd_format_build_ccw_req(struct dasd_device *base,
8fd57520
JH		 2812 struct format_data_t *fdata, int enable_pav,
2813 int tpm, struct eckd_count *fmt_buffer, int rpt)
570d237c 2814{
8fd57520
JH		 2815 struct dasd_ccw_req *ccw_req;
2816
2817 if (!fmt_buffer) {
5e2b17e7 2818 ccw_req = dasd_eckd_build_format(base, NULL, fdata, enable_pav);
8fd57520
JH		 2819 } else {
2820 if (tpm)
2821 ccw_req = dasd_eckd_build_check_tcw(base, fdata,
2822 enable_pav,
2823 fmt_buffer, rpt);
2824 else
2825 ccw_req = dasd_eckd_build_check(base, fdata, enable_pav,
2826 fmt_buffer, rpt);
2827 }
2828
2829 return ccw_req;
570d237c
JH		 2830}
2831
2832/*
2833 * Sanity checks on format_data
2834 */
2835static int dasd_eckd_format_sanity_checks(struct dasd_device *base,
2836 struct format_data_t *fdata)
d42e1712 2837{
543691a4 2838 struct dasd_eckd_private *private = base->private;
d42e1712 2839
d42e1712
SH		 2840 if (fdata->start_unit >=
2841 (private->real_cyl * private->rdc_data.trk_per_cyl)) {
2842 dev_warn(&base->cdev->dev,
2843 "Start track number %u used in formatting is too big\n",
2844 fdata->start_unit);
2845 return -EINVAL;
2846 }
2847 if (fdata->stop_unit >=
2848 (private->real_cyl * private->rdc_data.trk_per_cyl)) {
2849 dev_warn(&base->cdev->dev,
2850 "Stop track number %u used in formatting is too big\n",
2851 fdata->stop_unit);
2852 return -EINVAL;
2853 }
2854 if (fdata->start_unit > fdata->stop_unit) {
2855 dev_warn(&base->cdev->dev,
2856 "Start track %u used in formatting exceeds end track\n",
2857 fdata->start_unit);
2858 return -EINVAL;
2859 }
2860 if (dasd_check_blocksize(fdata->blksize) != 0) {
2861 dev_warn(&base->cdev->dev,
2862 "The DASD cannot be formatted with block size %u\n",
2863 fdata->blksize);
2864 return -EINVAL;
2865 }
570d237c
JH		 2866 return 0;
2867}
2868
2869/*
2870 * This function will process format_data originally coming from an IOCTL
2871 */
2872static int dasd_eckd_format_process_data(struct dasd_device *base,
2873 struct format_data_t *fdata,
8fd57520
JH		 2874 int enable_pav, int tpm,
2875 struct eckd_count *fmt_buffer, int rpt,
2876 struct irb *irb)
570d237c 2877{
543691a4 2878 struct dasd_eckd_private *private = base->private;
570d237c 2879 struct dasd_ccw_req *cqr, *n;
570d237c
JH		 2880 struct list_head format_queue;
2881 struct dasd_device *device;
8fd57520 2882 char *sense = NULL;
570d237c
JH		 2883 int old_start, old_stop, format_step;
2884 int step, retry;
2885 int rc;
2886
570d237c
JH		 2887 rc = dasd_eckd_format_sanity_checks(base, fdata);
2888 if (rc)
2889 return rc;
d42e1712
SH		 2890
2891 INIT_LIST_HEAD(&format_queue);
d42e1712 2892
46d1c03c 2893 old_start = fdata->start_unit;
29b8dd9d 2894 old_stop = fdata->stop_unit;
d42e1712 2895
8fd57520
JH		 2896 if (!tpm && fmt_buffer != NULL) {
2897 /* Command Mode / Format Check */
2898 format_step = 1;
2899 } else if (tpm && fmt_buffer != NULL) {
2900 /* Transport Mode / Format Check */
2901 format_step = DASD_CQR_MAX_CCW / rpt;
2902 } else {
2903 /* Normal Formatting */
2904 format_step = DASD_CQR_MAX_CCW /
2905 recs_per_track(&private->rdc_data, 0, fdata->blksize);
2906 }
2907
46d1c03c
JH		 2908 do {
2909 retry = 0;
2910 while (fdata->start_unit <= old_stop) {
2911 step = fdata->stop_unit - fdata->start_unit + 1;
2912 if (step > format_step) {
2913 fdata->stop_unit =
2914 fdata->start_unit + format_step - 1;
2915 }
d42e1712 2916
570d237c 2917 cqr = dasd_eckd_format_build_ccw_req(base, fdata,
8fd57520
JH		 2918 enable_pav, tpm,
2919 fmt_buffer, rpt);
46d1c03c
JH		 2920 if (IS_ERR(cqr)) {
2921 rc = PTR_ERR(cqr);
2922 if (rc == -ENOMEM) {
2923 if (list_empty(&format_queue))
2924 goto out;
2925 /*
2926 * not enough memory available, start
2927 * requests retry after first requests
2928 * were finished
2929 */
2930 retry = 1;
2931 break;
2932 }
2933 goto out_err;
2934 }
2935 list_add_tail(&cqr->blocklist, &format_queue);
d42e1712 2936
8fd57520
JH		 2937 if (fmt_buffer) {
2938 step = fdata->stop_unit - fdata->start_unit + 1;
2939 fmt_buffer += rpt * step;
2940 }
46d1c03c
JH		 2941 fdata->start_unit = fdata->stop_unit + 1;
2942 fdata->stop_unit = old_stop;
d42e1712 2943 }
d42e1712 2944
46d1c03c
JH		 2945 rc = dasd_sleep_on_queue(&format_queue);
2946
2947out_err:
2948 list_for_each_entry_safe(cqr, n, &format_queue, blocklist) {
2949 device = cqr->startdev;
543691a4 2950 private = device->private;
8fd57520
JH		 2951
2952 if (cqr->status == DASD_CQR_FAILED) {
2953 /*
2954 * Only get sense data if called by format
2955 * check
2956 */
2957 if (fmt_buffer && irb) {
2958 sense = dasd_get_sense(&cqr->irb);
2959 memcpy(irb, &cqr->irb, sizeof(*irb));
2960 }
46d1c03c 2961 rc = -EIO;
8fd57520 2962 }
46d1c03c 2963 list_del_init(&cqr->blocklist);
5e2b17e7 2964 dasd_ffree_request(cqr, device);
46d1c03c
JH		 2965 private->count--;
2966 }
d42e1712 2967
8fd57520 2968 if (rc && rc != -EIO)
46d1c03c 2969 goto out;
8fd57520
JH		 2970 if (rc == -EIO) {
2971 /*
2972 * In case fewer than the expected records are on the
2973 * track, we will most likely get a 'No Record Found'
2974 * error (in command mode) or a 'File Protected' error
2975 * (in transport mode). Those particular cases shouldn't
2976 * pass the -EIO to the IOCTL, therefore reset the rc
2977 * and continue.
2978 */
2979 if (sense &&
2980 (sense[1] & SNS1_NO_REC_FOUND ||
2981 sense[1] & SNS1_FILE_PROTECTED))
2982 retry = 1;
2983 else
2984 goto out;
2985 }
d42e1712 2986
46d1c03c 2987 } while (retry);
29b8dd9d 2988
46d1c03c
JH		 2989out:
2990 fdata->start_unit = old_start;
2991 fdata->stop_unit = old_stop;
d42e1712
SH		 2992
2993 return rc;
2994}
2995
570d237c
JH		 2996static int dasd_eckd_format_device(struct dasd_device *base,
2997 struct format_data_t *fdata, int enable_pav)
2998{
8fd57520
JH		 2999 return dasd_eckd_format_process_data(base, fdata, enable_pav, 0, NULL,
3000 0, NULL);
3001}
3002
5e2b17e7
JH		 3003/*
3004 * Callback function to free ESE format requests.
3005 */
3006static void dasd_eckd_ese_format_cb(struct dasd_ccw_req *cqr, void *data)
3007{
3008 struct dasd_device *device = cqr->startdev;
3009 struct dasd_eckd_private *private = device->private;
3010
3011 private->count--;
3012 dasd_ffree_request(cqr, device);
3013}
3014
3015static struct dasd_ccw_req *
3016dasd_eckd_ese_format(struct dasd_device *startdev, struct dasd_ccw_req *cqr)
3017{
3018 struct dasd_eckd_private *private;
3019 struct format_data_t fdata;
3020 unsigned int recs_per_trk;
3021 struct dasd_ccw_req *fcqr;
3022 struct dasd_device *base;
3023 struct dasd_block *block;
3024 unsigned int blksize;
3025 struct request *req;
3026 sector_t first_trk;
3027 sector_t last_trk;
3028 int rc;
3029
3030 req = cqr->callback_data;
3031 base = cqr->block->base;
3032 private = base->private;
3033 block = base->block;
3034 blksize = block->bp_block;
3035 recs_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
3036
3037 first_trk = blk_rq_pos(req) >> block->s2b_shift;
3038 sector_div(first_trk, recs_per_trk);
3039 last_trk =
3040 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift;
3041 sector_div(last_trk, recs_per_trk);
3042
3043 fdata.start_unit = first_trk;
3044 fdata.stop_unit = last_trk;
3045 fdata.blksize = blksize;
3046 fdata.intensity = private->uses_cdl ? DASD_FMT_INT_COMPAT : 0;
3047
3048 rc = dasd_eckd_format_sanity_checks(base, &fdata);
3049 if (rc)
3050 return ERR_PTR(-EINVAL);
3051
3052 /*
3053 * We're building the request with PAV disabled as we're reusing
3054 * the former startdev.
3055 */
3056 fcqr = dasd_eckd_build_format(base, startdev, &fdata, 0);
3057 if (IS_ERR(fcqr))
3058 return fcqr;
3059
3060 fcqr->callback = dasd_eckd_ese_format_cb;
3061
3062 return fcqr;
3063}
3064
3065/*
3066 * When data is read from an unformatted area of an ESE volume, this function
3067 * returns zeroed data and thereby mimics a read of zero data.
3068 */
3069static void dasd_eckd_ese_read(struct dasd_ccw_req *cqr)
3070{
3071 unsigned int blksize, off;
3072 struct dasd_device *base;
3073 struct req_iterator iter;
3074 struct request *req;
3075 struct bio_vec bv;
3076 char *dst;
3077
3078 req = (struct request *) cqr->callback_data;
3079 base = cqr->block->base;
3080 blksize = base->block->bp_block;
3081
3082 rq_for_each_segment(bv, req, iter) {
3083 dst = page_address(bv.bv_page) + bv.bv_offset;
3084 for (off = 0; off < bv.bv_len; off += blksize) {
3085 if (dst && rq_data_dir(req) == READ) {
3086 dst += off;
3087 memset(dst, 0, blksize);
3088 }
3089 }
3090 }
3091}
3092
8fd57520
JH		 3093/*
3094 * Helper function to count consecutive records of a single track.
3095 */
3096static int dasd_eckd_count_records(struct eckd_count *fmt_buffer, int start,
3097 int max)
3098{
3099 int head;
3100 int i;
3101
3102 head = fmt_buffer[start].head;
3103
3104 /*
3105 * There are 3 conditions where we stop counting:
3106 * - if data reoccurs (same head and record may reoccur), which may
3107 * happen due to the way DASD_ECKD_CCW_READ_COUNT works
3108 * - when the head changes, because we're iterating over several tracks
3109 * then (DASD_ECKD_CCW_READ_COUNT_MT)
3110 * - when we've reached the end of sensible data in the buffer (the
3111 * record will be 0 then)
3112 */
3113 for (i = start; i < max; i++) {
3114 if (i > start) {
3115 if ((fmt_buffer[i].head == head &&
3116 fmt_buffer[i].record == 1) ||
3117 fmt_buffer[i].head != head ||
3118 fmt_buffer[i].record == 0)
3119 break;
3120 }
3121 }
3122
3123 return i - start;
3124}
3125
3126/*
3127 * Evaluate a given range of tracks. Data like number of records, blocksize,
3128 * record ids, and key length are compared with expected data.
3129 *
3130 * If a mismatch occurs, the corresponding error bit is set, as well as
3131 * additional information, depending on the error.
3132 */
3133static void dasd_eckd_format_evaluate_tracks(struct eckd_count *fmt_buffer,
3134 struct format_check_t *cdata,
3135 int rpt_max, int rpt_exp,
3136 int trk_per_cyl, int tpm)
3137{
3138 struct ch_t geo;
3139 int max_entries;
3140 int count = 0;
3141 int trkcount;
3142 int blksize;
3143 int pos = 0;
3144 int i, j;
3145 int kl;
3146
3147 trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1;
3148 max_entries = trkcount * rpt_max;
3149
3150 for (i = cdata->expect.start_unit; i <= cdata->expect.stop_unit; i++) {
3151 /* Calculate the correct next starting position in the buffer */
3152 if (tpm) {
3153 while (fmt_buffer[pos].record == 0 &&
3154 fmt_buffer[pos].dl == 0) {
3155 if (pos++ > max_entries)
3156 break;
3157 }
3158 } else {
3159 if (i != cdata->expect.start_unit)
3160 pos += rpt_max - count;
3161 }
3162
3163 /* Calculate the expected geo values for the current track */
3164 set_ch_t(&geo, i / trk_per_cyl, i % trk_per_cyl);
3165
3166 /* Count and check number of records */
3167 count = dasd_eckd_count_records(fmt_buffer, pos, pos + rpt_max);
3168
3169 if (count < rpt_exp) {
3170 cdata->result = DASD_FMT_ERR_TOO_FEW_RECORDS;
3171 break;
3172 }
3173 if (count > rpt_exp) {
3174 cdata->result = DASD_FMT_ERR_TOO_MANY_RECORDS;
3175 break;
3176 }
3177
3178 for (j = 0; j < count; j++, pos++) {
3179 blksize = cdata->expect.blksize;
3180 kl = 0;
3181
3182 /*
3183 * Set special values when checking CDL formatted
3184 * devices.
3185 */
3186 if ((cdata->expect.intensity & 0x08) &&
3187 geo.cyl == 0 && geo.head == 0) {
3188 if (j < 3) {
3189 blksize = sizes_trk0[j] - 4;
3190 kl = 4;
3191 }
3192 }
3193 if ((cdata->expect.intensity & 0x08) &&
3194 geo.cyl == 0 && geo.head == 1) {
3195 blksize = LABEL_SIZE - 44;
3196 kl = 44;
3197 }
3198
3199 /* Check blocksize */
3200 if (fmt_buffer[pos].dl != blksize) {
3201 cdata->result = DASD_FMT_ERR_BLKSIZE;
3202 goto out;
3203 }
3204 /* Check if key length is 0 */
3205 if (fmt_buffer[pos].kl != kl) {
3206 cdata->result = DASD_FMT_ERR_KEY_LENGTH;
3207 goto out;
3208 }
3209 /* Check if record_id is correct */
3210 if (fmt_buffer[pos].cyl != geo.cyl ||
3211 fmt_buffer[pos].head != geo.head ||
3212 fmt_buffer[pos].record != (j + 1)) {
3213 cdata->result = DASD_FMT_ERR_RECORD_ID;
3214 goto out;
3215 }
3216 }
3217 }
3218
3219out:
3220 /*
3221 * In case of no errors, we need to decrease by one
3222 * to get the correct positions.
3223 */
3224 if (!cdata->result) {
3225 i--;
3226 pos--;
3227 }
3228
3229 cdata->unit = i;
3230 cdata->num_records = count;
3231 cdata->rec = fmt_buffer[pos].record;
3232 cdata->blksize = fmt_buffer[pos].dl;
3233 cdata->key_length = fmt_buffer[pos].kl;
3234}
3235
3236/*
3237 * Check the format of a range of tracks of a DASD.
3238 */
3239static int dasd_eckd_check_device_format(struct dasd_device *base,
3240 struct format_check_t *cdata,
3241 int enable_pav)
3242{
3243 struct dasd_eckd_private *private = base->private;
3244 struct eckd_count *fmt_buffer;
3245 struct irb irb;
3246 int rpt_max, rpt_exp;
3247 int fmt_buffer_size;
3248 int trk_per_cyl;
3249 int trkcount;
3250 int tpm = 0;
3251 int rc;
3252
3253 trk_per_cyl = private->rdc_data.trk_per_cyl;
3254
3255 /* Get maximum and expected amount of records per track */
3256 rpt_max = recs_per_track(&private->rdc_data, 0, 512) + 1;
3257 rpt_exp = recs_per_track(&private->rdc_data, 0, cdata->expect.blksize);
3258
3259 trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1;
3260 fmt_buffer_size = trkcount * rpt_max * sizeof(struct eckd_count);
3261
3262 fmt_buffer = kzalloc(fmt_buffer_size, GFP_KERNEL | GFP_DMA);
3263 if (!fmt_buffer)
3264 return -ENOMEM;
3265
3266 /*
3267 * A certain FICON feature subset is needed to operate in transport
3268 * mode. Additionally, the support for transport mode is implicitly
3269 * checked by comparing the buffer size with fcx_max_data. As long as
3270 * the buffer size is smaller we can operate in transport mode and
3271 * process multiple tracks. If not, only one track at once is being
3272 * processed using command mode.
3273 */
3274 if ((private->features.feature[40] & 0x04) &&
3275 fmt_buffer_size <= private->fcx_max_data)
3276 tpm = 1;
3277
3278 rc = dasd_eckd_format_process_data(base, &cdata->expect, enable_pav,
3279 tpm, fmt_buffer, rpt_max, &irb);
3280 if (rc && rc != -EIO)
3281 goto out;
3282 if (rc == -EIO) {
3283 /*
3284 * If our first attempt with transport mode enabled comes back
3285 * with an incorrect length error, we're going to retry the
3286 * check with command mode.
3287 */
3288 if (tpm && scsw_cstat(&irb.scsw) == 0x40) {
3289 tpm = 0;
3290 rc = dasd_eckd_format_process_data(base, &cdata->expect,
3291 enable_pav, tpm,
3292 fmt_buffer, rpt_max,
3293 &irb);
3294 if (rc)
3295 goto out;
3296 } else {
3297 goto out;
3298 }
3299 }
3300
3301 dasd_eckd_format_evaluate_tracks(fmt_buffer, cdata, rpt_max, rpt_exp,
3302 trk_per_cyl, tpm);
3303
3304out:
3305 kfree(fmt_buffer);
3306
3307 return rc;
570d237c
JH		 3308}
3309
8e09f215 3310static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr)
1da177e4 3311{
a2ace466
HR		 3312 if (cqr->retries < 0) {
3313 cqr->status = DASD_CQR_FAILED;
3314 return;
3315 }
8e09f215
SW		 3316 cqr->status = DASD_CQR_FILLED;
3317 if (cqr->block && (cqr->startdev != cqr->block->base)) {
3318 dasd_eckd_reset_ccw_to_base_io(cqr);
3319 cqr->startdev = cqr->block->base;
c9346151 3320 cqr->lpm = dasd_path_get_opm(cqr->block->base);
1da177e4 3321 }
8e09f215 3322};
1da177e4
LT		 3323
3324static dasd_erp_fn_t
3325dasd_eckd_erp_action(struct dasd_ccw_req * cqr)
3326{
8e09f215 3327 struct dasd_device *device = (struct dasd_device *) cqr->startdev;
1da177e4
LT		 3328 struct ccw_device *cdev = device->cdev;
3329
3330 switch (cdev->id.cu_type) {
3331 case 0x3990:
3332 case 0x2105:
3333 case 0x2107:
3334 case 0x1750:
3335 return dasd_3990_erp_action;
3336 case 0x9343:
3337 case 0x3880:
3338 default:
3339 return dasd_default_erp_action;
3340 }
3341}
3342
3343static dasd_erp_fn_t
3344dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr)
3345{
3346 return dasd_default_erp_postaction;
3347}
3348
5a27e60d
SW		 3349static void dasd_eckd_check_for_device_change(struct dasd_device *device,
3350 struct dasd_ccw_req *cqr,
3351 struct irb *irb)
8e09f215
SW		 3352{
3353 char mask;
f3eb5384 3354 char *sense = NULL;
543691a4 3355 struct dasd_eckd_private *private = device->private;
8e09f215
SW		 3356
3357 /* first of all check for state change pending interrupt */
3358 mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP;
f3eb5384 3359 if ((scsw_dstat(&irb->scsw) & mask) == mask) {
c8d1c0ff
SH		 3360 /*
3361 * for alias only, not in offline processing
3362 * and only if not suspended
3363 */
501183f2 3364 if (!device->block && private->lcu &&
25e2cf1c 3365 device->state == DASD_STATE_ONLINE &&
c8d1c0ff
SH		 3366 !test_bit(DASD_FLAG_OFFLINE, &device->flags) &&
3367 !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) {
501183f2
SH		 3368 /* schedule worker to reload device */
3369 dasd_reload_device(device);
3370 }
8e09f215
SW		 3371 dasd_generic_handle_state_change(device);
3372 return;
3373 }
3374
a5a0061f 3375 sense = dasd_get_sense(irb);
5a27e60d
SW		 3376 if (!sense)
3377 return;
3378
3379 /* summary unit check */
c7a29e56 3380 if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) &&
a5a0061f 3381 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) {
59a9ed5f
SH		 3382 if (test_and_set_bit(DASD_FLAG_SUC, &device->flags)) {
3383 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
3384 "eckd suc: device already notified");
3385 return;
3386 }
3387 sense = dasd_get_sense(irb);
3388 if (!sense) {
3389 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
3390 "eckd suc: no reason code available");
3391 clear_bit(DASD_FLAG_SUC, &device->flags);
3392 return;
3393
3394 }
3395 private->suc_reason = sense[8];
3396 DBF_DEV_EVENT(DBF_NOTICE, device, "%s %x",
3397 "eckd handle summary unit check: reason",
3398 private->suc_reason);
3399 dasd_get_device(device);
3400 if (!schedule_work(&device->suc_work))
3401 dasd_put_device(device);
3402
8e09f215
SW		 3403 return;
3404 }
3405
f60c768c 3406 /* service information message SIM */
5a27e60d 3407 if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) &&
f3eb5384
SW		 3408 ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) {
3409 dasd_3990_erp_handle_sim(device, sense);
f60c768c
SH		 3410 return;
3411 }
3412
5a27e60d
SW		 3413 /* loss of device reservation is handled via base devices only
3414 * as alias devices may be used with several bases
3415 */
c7a29e56
SW		 3416 if (device->block && (sense[27] & DASD_SENSE_BIT_0) &&
3417 (sense[7] == 0x3F) &&
5a27e60d
SW		 3418 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) &&
3419 test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) {
3420 if (device->features & DASD_FEATURE_FAILONSLCK)
3421 set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags);
3422 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags);
3423 dev_err(&device->cdev->dev,
3424 "The device reservation was lost\n");
ada3df91 3425 }
5a27e60d 3426}
f3eb5384 3427
91dc4a19
JH		 3428static int dasd_eckd_ras_sanity_checks(struct dasd_device *device,
3429 unsigned int first_trk,
3430 unsigned int last_trk)
3431{
3432 struct dasd_eckd_private *private = device->private;
3433 unsigned int trks_per_vol;
3434 int rc = 0;
3435
3436 trks_per_vol = private->real_cyl * private->rdc_data.trk_per_cyl;
3437
3438 if (first_trk >= trks_per_vol) {
3439 dev_warn(&device->cdev->dev,
3440 "Start track number %u used in the space release command is too big\n",
3441 first_trk);
3442 rc = -EINVAL;
3443 } else if (last_trk >= trks_per_vol) {
3444 dev_warn(&device->cdev->dev,
3445 "Stop track number %u used in the space release command is too big\n",
3446 last_trk);
3447 rc = -EINVAL;
3448 } else if (first_trk > last_trk) {
3449 dev_warn(&device->cdev->dev,
3450 "Start track %u used in the space release command exceeds the end track\n",
3451 first_trk);
3452 rc = -EINVAL;
3453 }
3454 return rc;
3455}
3456
3457/*
3458 * Helper function to count the amount of involved extents within a given range
3459 * with extent alignment in mind.
3460 */
3461static int count_exts(unsigned int from, unsigned int to, int trks_per_ext)
3462{
3463 int cur_pos = 0;
3464 int count = 0;
3465 int tmp;
3466
3467 if (from == to)
3468 return 1;
3469
3470 /* Count first partial extent */
3471 if (from % trks_per_ext != 0) {
3472 tmp = from + trks_per_ext - (from % trks_per_ext) - 1;
3473 if (tmp > to)
3474 tmp = to;
3475 cur_pos = tmp - from + 1;
3476 count++;
3477 }
3478 /* Count full extents */
3479 if (to - (from + cur_pos) + 1 >= trks_per_ext) {
3480 tmp = to - ((to - trks_per_ext + 1) % trks_per_ext);
3481 count += (tmp - (from + cur_pos) + 1) / trks_per_ext;
3482 cur_pos = tmp;
3483 }
3484 /* Count last partial extent */
3485 if (cur_pos < to)
3486 count++;
3487
3488 return count;
3489}
3490
3491/*
3492 * Release allocated space for a given range or an entire volume.
3493 */
3494static struct dasd_ccw_req *
3495dasd_eckd_dso_ras(struct dasd_device *device, struct dasd_block *block,
3496 struct request *req, unsigned int first_trk,
3497 unsigned int last_trk, int by_extent)
3498{
3499 struct dasd_eckd_private *private = device->private;
3500 struct dasd_dso_ras_ext_range *ras_range;
3501 struct dasd_rssd_features *features;
3502 struct dasd_dso_ras_data *ras_data;
3503 u16 heads, beg_head, end_head;
3504 int cur_to_trk, cur_from_trk;
3505 struct dasd_ccw_req *cqr;
3506 u32 beg_cyl, end_cyl;
3507 struct ccw1 *ccw;
3508 int trks_per_ext;
3509 size_t ras_size;
3510 size_t size;
3511 int nr_exts;
3512 void *rq;
3513 int i;
3514
3515 if (dasd_eckd_ras_sanity_checks(device, first_trk, last_trk))
3516 return ERR_PTR(-EINVAL);
3517
3518 rq = req ? blk_mq_rq_to_pdu(req) : NULL;
3519
3520 features = &private->features;
3521
3522 trks_per_ext = dasd_eckd_ext_size(device) * private->rdc_data.trk_per_cyl;
3523 nr_exts = 0;
3524 if (by_extent)
3525 nr_exts = count_exts(first_trk, last_trk, trks_per_ext);
3526 ras_size = sizeof(*ras_data);
3527 size = ras_size + (nr_exts * sizeof(*ras_range));
3528
3529 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, size, device, rq);
3530 if (IS_ERR(cqr)) {
3531 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
3532 "Could not allocate RAS request");
3533 return cqr;
3534 }
3535
3536 ras_data = cqr->data;
3537 memset(ras_data, 0, size);
3538
3539 ras_data->order = DSO_ORDER_RAS;
3540 ras_data->flags.vol_type = 0; /* CKD volume */
3541 /* Release specified extents or entire volume */
3542 ras_data->op_flags.by_extent = by_extent;
3543 /*
3544 * This bit guarantees initialisation of tracks within an extent that is
3545 * not fully specified, but is only supported with a certain feature
3546 * subset.
3547 */
3548 ras_data->op_flags.guarantee_init = !!(features->feature[56] & 0x01);
3549 ras_data->lss = private->ned->ID;
3550 ras_data->dev_addr = private->ned->unit_addr;
3551 ras_data->nr_exts = nr_exts;
3552
3553 if (by_extent) {
3554 heads = private->rdc_data.trk_per_cyl;
3555 cur_from_trk = first_trk;
3556 cur_to_trk = first_trk + trks_per_ext -
3557 (first_trk % trks_per_ext) - 1;
3558 if (cur_to_trk > last_trk)
3559 cur_to_trk = last_trk;
3560 ras_range = (struct dasd_dso_ras_ext_range *)(cqr->data + ras_size);
3561
3562 for (i = 0; i < nr_exts; i++) {
3563 beg_cyl = cur_from_trk / heads;
3564 beg_head = cur_from_trk % heads;
3565 end_cyl = cur_to_trk / heads;
3566 end_head = cur_to_trk % heads;
3567
3568 set_ch_t(&ras_range->beg_ext, beg_cyl, beg_head);
3569 set_ch_t(&ras_range->end_ext, end_cyl, end_head);
3570
3571 cur_from_trk = cur_to_trk + 1;
3572 cur_to_trk = cur_from_trk + trks_per_ext - 1;
3573 if (cur_to_trk > last_trk)
3574 cur_to_trk = last_trk;
3575 ras_range++;
3576 }
3577 }
3578
3579 ccw = cqr->cpaddr;
3580 ccw->cda = (__u32)(addr_t)cqr->data;
3581 ccw->cmd_code = DASD_ECKD_CCW_DSO;
3582 ccw->count = size;
3583
3584 cqr->startdev = device;
3585 cqr->memdev = device;
3586 cqr->block = block;
3587 cqr->retries = 256;
3588 cqr->expires = device->default_expires * HZ;
3589 cqr->buildclk = get_tod_clock();
3590 cqr->status = DASD_CQR_FILLED;
3591
3592 return cqr;
3593}
3594
3595static int dasd_eckd_release_space_full(struct dasd_device *device)
3596{
3597 struct dasd_ccw_req *cqr;
3598 int rc;
3599
3600 cqr = dasd_eckd_dso_ras(device, NULL, NULL, 0, 0, 0);
3601 if (IS_ERR(cqr))
3602 return PTR_ERR(cqr);
3603
3604 rc = dasd_sleep_on_interruptible(cqr);
3605
3606 dasd_sfree_request(cqr, cqr->memdev);
3607
3608 return rc;
3609}
3610
3611static int dasd_eckd_release_space_trks(struct dasd_device *device,
3612 unsigned int from, unsigned int to)
3613{
3614 struct dasd_eckd_private *private = device->private;
3615 struct dasd_block *block = device->block;
3616 struct dasd_ccw_req *cqr, *n;
3617 struct list_head ras_queue;
3618 unsigned int device_exts;
3619 int trks_per_ext;
3620 int stop, step;
3621 int cur_pos;
3622 int rc = 0;
3623 int retry;
3624
3625 INIT_LIST_HEAD(&ras_queue);
3626
3627 device_exts = private->real_cyl / dasd_eckd_ext_size(device);
3628 trks_per_ext = dasd_eckd_ext_size(device) * private->rdc_data.trk_per_cyl;
3629
3630 /* Make sure device limits are not exceeded */
3631 step = trks_per_ext * min(device_exts, DASD_ECKD_RAS_EXTS_MAX);
3632 cur_pos = from;
3633
3634 do {
3635 retry = 0;
3636 while (cur_pos < to) {
3637 stop = cur_pos + step -
3638 ((cur_pos + step) % trks_per_ext) - 1;
3639 if (stop > to)
3640 stop = to;
3641
3642 cqr = dasd_eckd_dso_ras(device, NULL, NULL, cur_pos, stop, 1);
3643 if (IS_ERR(cqr)) {
3644 rc = PTR_ERR(cqr);
3645 if (rc == -ENOMEM) {
3646 if (list_empty(&ras_queue))
3647 goto out;
3648 retry = 1;
3649 break;
3650 }
3651 goto err_out;
3652 }
3653
3654 spin_lock_irq(&block->queue_lock);
3655 list_add_tail(&cqr->blocklist, &ras_queue);
3656 spin_unlock_irq(&block->queue_lock);
3657 cur_pos = stop + 1;
3658 }
3659
3660 rc = dasd_sleep_on_queue_interruptible(&ras_queue);
3661
3662err_out:
3663 list_for_each_entry_safe(cqr, n, &ras_queue, blocklist) {
3664 device = cqr->startdev;
3665 private = device->private;
3666
3667 spin_lock_irq(&block->queue_lock);
3668 list_del_init(&cqr->blocklist);
3669 spin_unlock_irq(&block->queue_lock);
3670 dasd_sfree_request(cqr, device);
3671 private->count--;
3672 }
3673 } while (retry);
3674
3675out:
3676 return rc;
3677}
3678
3679static int dasd_eckd_release_space(struct dasd_device *device,
3680 struct format_data_t *rdata)
3681{
3682 if (rdata->intensity & DASD_FMT_INT_ESE_FULL)
3683 return dasd_eckd_release_space_full(device);
3684 else if (rdata->intensity == 0)
3685 return dasd_eckd_release_space_trks(device, rdata->start_unit,
3686 rdata->stop_unit);
3687 else
3688 return -EINVAL;
3689}
3690
f3eb5384
SW		 3691static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single(
3692 struct dasd_device *startdev,
8e09f215 3693 struct dasd_block *block,
f3eb5384
SW		 3694 struct request *req,
3695 sector_t first_rec,
3696 sector_t last_rec,
3697 sector_t first_trk,
3698 sector_t last_trk,
3699 unsigned int first_offs,
3700 unsigned int last_offs,
3701 unsigned int blk_per_trk,
3702 unsigned int blksize)
1da177e4
LT		 3703{
3704 struct dasd_eckd_private *private;
3705 unsigned long *idaws;
3706 struct LO_eckd_data *LO_data;
3707 struct dasd_ccw_req *cqr;
3708 struct ccw1 *ccw;
5705f702 3709 struct req_iterator iter;
7988613b 3710 struct bio_vec bv;
1da177e4 3711 char *dst;
f3eb5384 3712 unsigned int off;
1da177e4 3713 int count, cidaw, cplength, datasize;
f3eb5384 3714 sector_t recid;
1da177e4 3715 unsigned char cmd, rcmd;
8e09f215
SW		 3716 int use_prefix;
3717 struct dasd_device *basedev;
1da177e4 3718
8e09f215 3719 basedev = block->base;
543691a4 3720 private = basedev->private;
1da177e4
LT		 3721 if (rq_data_dir(req) == READ)
3722 cmd = DASD_ECKD_CCW_READ_MT;
3723 else if (rq_data_dir(req) == WRITE)
3724 cmd = DASD_ECKD_CCW_WRITE_MT;
3725 else
3726 return ERR_PTR(-EINVAL);
f3eb5384 3727
1da177e4
LT		 3728 /* Check struct bio and count the number of blocks for the request. */
3729 count = 0;
3730 cidaw = 0;
5705f702 3731 rq_for_each_segment(bv, req, iter) {
7988613b 3732 if (bv.bv_len & (blksize - 1))
6c92e699
JA		 3733 /* Eckd can only do full blocks. */
3734 return ERR_PTR(-EINVAL);
7988613b 3735 count += bv.bv_len >> (block->s2b_shift + 9);
7988613b
KO		 3736 if (idal_is_needed (page_address(bv.bv_page), bv.bv_len))
3737 cidaw += bv.bv_len >> (block->s2b_shift + 9);
1da177e4
LT		 3738 }
3739 /* Paranoia. */
3740 if (count != last_rec - first_rec + 1)
3741 return ERR_PTR(-EINVAL);
8e09f215
SW		 3742
3743 /* use the prefix command if available */
3744 use_prefix = private->features.feature[8] & 0x01;
3745 if (use_prefix) {
3746 /* 1x prefix + number of blocks */
3747 cplength = 2 + count;
3748 /* 1x prefix + cidaws*sizeof(long) */
3749 datasize = sizeof(struct PFX_eckd_data) +
3750 sizeof(struct LO_eckd_data) +
3751 cidaw * sizeof(unsigned long);
3752 } else {
3753 /* 1x define extent + 1x locate record + number of blocks */
3754 cplength = 2 + count;
3755 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */
3756 datasize = sizeof(struct DE_eckd_data) +
3757 sizeof(struct LO_eckd_data) +
3758 cidaw * sizeof(unsigned long);
3759 }
1da177e4
LT		 3760 /* Find out the number of additional locate record ccws for cdl. */
3761 if (private->uses_cdl && first_rec < 2*blk_per_trk) {
3762 if (last_rec >= 2*blk_per_trk)
3763 count = 2*blk_per_trk - first_rec;
3764 cplength += count;
3765 datasize += count*sizeof(struct LO_eckd_data);
3766 }
3767 /* Allocate the ccw request. */
68b781fe 3768 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
c5205f2f 3769 startdev, blk_mq_rq_to_pdu(req));
1da177e4
LT		 3770 if (IS_ERR(cqr))
3771 return cqr;
3772 ccw = cqr->cpaddr;
8e09f215
SW		 3773 /* First ccw is define extent or prefix. */
3774 if (use_prefix) {
3775 if (prefix(ccw++, cqr->data, first_trk,
3776 last_trk, cmd, basedev, startdev) == -EAGAIN) {
3777 /* Clock not in sync and XRC is enabled.
3778 * Try again later.
3779 */
3780 dasd_sfree_request(cqr, startdev);
3781 return ERR_PTR(-EAGAIN);
3782 }
3783 idaws = (unsigned long *) (cqr->data +
3784 sizeof(struct PFX_eckd_data));
3785 } else {
3786 if (define_extent(ccw++, cqr->data, first_trk,
45f186be 3787 last_trk, cmd, basedev, 0) == -EAGAIN) {
8e09f215
SW		 3788 /* Clock not in sync and XRC is enabled.
3789 * Try again later.
3790 */
3791 dasd_sfree_request(cqr, startdev);
3792 return ERR_PTR(-EAGAIN);
3793 }
3794 idaws = (unsigned long *) (cqr->data +
3795 sizeof(struct DE_eckd_data));
d54853ef 3796 }
1da177e4 3797 /* Build locate_record+read/write/ccws. */
1da177e4
LT		 3798 LO_data = (struct LO_eckd_data *) (idaws + cidaw);
3799 recid = first_rec;
3800 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) {
3801 /* Only standard blocks so there is just one locate record. */
3802 ccw[-1].flags |= CCW_FLAG_CC;
3803 locate_record(ccw++, LO_data++, first_trk, first_offs + 1,
8e09f215 3804 last_rec - recid + 1, cmd, basedev, blksize);
1da177e4 3805 }
5705f702 3806 rq_for_each_segment(bv, req, iter) {
7988613b 3807 dst = page_address(bv.bv_page) + bv.bv_offset;
1da177e4
LT		 3808 if (dasd_page_cache) {
3809 char *copy = kmem_cache_alloc(dasd_page_cache,
441e143e 3810 GFP_DMA | __GFP_NOWARN);
1da177e4 3811 if (copy && rq_data_dir(req) == WRITE)
7988613b 3812 memcpy(copy + bv.bv_offset, dst, bv.bv_len);
1da177e4 3813 if (copy)
7988613b 3814 dst = copy + bv.bv_offset;
1da177e4 3815 }
7988613b 3816 for (off = 0; off < bv.bv_len; off += blksize) {
1da177e4
LT		 3817 sector_t trkid = recid;
3818 unsigned int recoffs = sector_div(trkid, blk_per_trk);
3819 rcmd = cmd;
3820 count = blksize;
3821 /* Locate record for cdl special block ? */
3822 if (private->uses_cdl && recid < 2*blk_per_trk) {
3823 if (dasd_eckd_cdl_special(blk_per_trk, recid)){
3824 rcmd |= 0x8;
3825 count = dasd_eckd_cdl_reclen(recid);
ec5883ab
HH		 3826 if (count < blksize &&
3827 rq_data_dir(req) == READ)
1da177e4
LT		 3828 memset(dst + count, 0xe5,
3829 blksize - count);
3830 }
3831 ccw[-1].flags |= CCW_FLAG_CC;
3832 locate_record(ccw++, LO_data++,
3833 trkid, recoffs + 1,
8e09f215 3834 1, rcmd, basedev, count);
1da177e4
LT		 3835 }
3836 /* Locate record for standard blocks ? */
3837 if (private->uses_cdl && recid == 2*blk_per_trk) {
3838 ccw[-1].flags |= CCW_FLAG_CC;
3839 locate_record(ccw++, LO_data++,
3840 trkid, recoffs + 1,
3841 last_rec - recid + 1,
8e09f215 3842 cmd, basedev, count);
1da177e4
LT		 3843 }
3844 /* Read/write ccw. */
3845 ccw[-1].flags |= CCW_FLAG_CC;
3846 ccw->cmd_code = rcmd;
3847 ccw->count = count;
3848 if (idal_is_needed(dst, blksize)) {
3849 ccw->cda = (__u32)(addr_t) idaws;
3850 ccw->flags = CCW_FLAG_IDA;
3851 idaws = idal_create_words(idaws, dst, blksize);
3852 } else {
3853 ccw->cda = (__u32)(addr_t) dst;
3854 ccw->flags = 0;
3855 }
3856 ccw++;
3857 dst += blksize;
3858 recid++;
3859 }
3860 }
13de227b
HS		 3861 if (blk_noretry_request(req) ||
3862 block->base->features & DASD_FEATURE_FAILFAST)
1c01b8a5 3863 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
8e09f215
SW		 3864 cqr->startdev = startdev;
3865 cqr->memdev = startdev;
3866 cqr->block = block;
7c8faa86 3867 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
c9346151 3868 cqr->lpm = dasd_path_get_ppm(startdev);
1f1ee9ad 3869 cqr->retries = startdev->default_retries;
1aae0560 3870 cqr->buildclk = get_tod_clock();
1da177e4 3871 cqr->status = DASD_CQR_FILLED;
5e2b17e7
JH		 3872
3873 /* Set flags to suppress output for expected errors */
3874 if (dasd_eckd_is_ese(basedev)) {
3875 set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags);
3876 set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags);
3877 set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags);
3878 }
3879
1da177e4
LT		 3880 return cqr;
3881}
3882
f3eb5384
SW		 3883static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track(
3884 struct dasd_device *startdev,
3885 struct dasd_block *block,
3886 struct request *req,
3887 sector_t first_rec,
3888 sector_t last_rec,
3889 sector_t first_trk,
3890 sector_t last_trk,
3891 unsigned int first_offs,
3892 unsigned int last_offs,
3893 unsigned int blk_per_trk,
3894 unsigned int blksize)
3895{
f3eb5384
SW		 3896 unsigned long *idaws;
3897 struct dasd_ccw_req *cqr;
3898 struct ccw1 *ccw;
3899 struct req_iterator iter;
7988613b 3900 struct bio_vec bv;
f3eb5384
SW		 3901 char *dst, *idaw_dst;
3902 unsigned int cidaw, cplength, datasize;
3903 unsigned int tlf;
3904 sector_t recid;
3905 unsigned char cmd;
3906 struct dasd_device *basedev;
3907 unsigned int trkcount, count, count_to_trk_end;
3908 unsigned int idaw_len, seg_len, part_len, len_to_track_end;
3909 unsigned char new_track, end_idaw;
3910 sector_t trkid;
3911 unsigned int recoffs;
3912
3913 basedev = block->base;
f3eb5384
SW		 3914 if (rq_data_dir(req) == READ)
3915 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
3916 else if (rq_data_dir(req) == WRITE)
3917 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
3918 else
3919 return ERR_PTR(-EINVAL);
3920
3921 /* Track based I/O needs IDAWs for each page, and not just for
3922 * 64 bit addresses. We need additional idals for pages
3923 * that get filled from two tracks, so we use the number
3924 * of records as upper limit.
3925 */
3926 cidaw = last_rec - first_rec + 1;
3927 trkcount = last_trk - first_trk + 1;
3928
3929 /* 1x prefix + one read/write ccw per track */
3930 cplength = 1 + trkcount;
3931
7bf76f01 3932 datasize = sizeof(struct PFX_eckd_data) + cidaw * sizeof(unsigned long);
f3eb5384
SW		 3933
3934 /* Allocate the ccw request. */
68b781fe 3935 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
c5205f2f 3936 startdev, blk_mq_rq_to_pdu(req));
f3eb5384
SW		 3937 if (IS_ERR(cqr))
3938 return cqr;
3939 ccw = cqr->cpaddr;
3940 /* transfer length factor: how many bytes to read from the last track */
3941 if (first_trk == last_trk)
3942 tlf = last_offs - first_offs + 1;
3943 else
3944 tlf = last_offs + 1;
3945 tlf *= blksize;
3946
3947 if (prefix_LRE(ccw++, cqr->data, first_trk,
3948 last_trk, cmd, basedev, startdev,
3949 1 /* format */, first_offs + 1,
3950 trkcount, blksize,
3951 tlf) == -EAGAIN) {
3952 /* Clock not in sync and XRC is enabled.
3953 * Try again later.
3954 */
3955 dasd_sfree_request(cqr, startdev);
3956 return ERR_PTR(-EAGAIN);
3957 }
3958
3959 /*
3960 * The translation of request into ccw programs must meet the
3961 * following conditions:
3962 * - all idaws but the first and the last must address full pages
3963 * (or 2K blocks on 31-bit)
3964 * - the scope of a ccw and it's idal ends with the track boundaries
3965 */
3966 idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data));
3967 recid = first_rec;
3968 new_track = 1;
3969 end_idaw = 0;
3970 len_to_track_end = 0;
246ccea1 3971 idaw_dst = NULL;
f3eb5384
SW		 3972 idaw_len = 0;
3973 rq_for_each_segment(bv, req, iter) {
7988613b
KO		 3974 dst = page_address(bv.bv_page) + bv.bv_offset;
3975 seg_len = bv.bv_len;
f3eb5384
SW		 3976 while (seg_len) {
3977 if (new_track) {
3978 trkid = recid;
3979 recoffs = sector_div(trkid, blk_per_trk);
3980 count_to_trk_end = blk_per_trk - recoffs;
3981 count = min((last_rec - recid + 1),
3982 (sector_t)count_to_trk_end);
3983 len_to_track_end = count * blksize;
3984 ccw[-1].flags |= CCW_FLAG_CC;
3985 ccw->cmd_code = cmd;
3986 ccw->count = len_to_track_end;
3987 ccw->cda = (__u32)(addr_t)idaws;
3988 ccw->flags = CCW_FLAG_IDA;
3989 ccw++;
3990 recid += count;
3991 new_track = 0;
52db45c3
SW		 3992 /* first idaw for a ccw may start anywhere */
3993 if (!idaw_dst)
3994 idaw_dst = dst;
f3eb5384 3995 }
52db45c3
SW		 3996 /* If we start a new idaw, we must make sure that it
3997 * starts on an IDA_BLOCK_SIZE boundary.
f3eb5384
SW		 3998 * If we continue an idaw, we must make sure that the
3999 * current segment begins where the so far accumulated
4000 * idaw ends
4001 */
52db45c3
SW		 4002 if (!idaw_dst) {
4003 if (__pa(dst) & (IDA_BLOCK_SIZE-1)) {
4004 dasd_sfree_request(cqr, startdev);
4005 return ERR_PTR(-ERANGE);
4006 } else
4007 idaw_dst = dst;
4008 }
f3eb5384
SW		 4009 if ((idaw_dst + idaw_len) != dst) {
4010 dasd_sfree_request(cqr, startdev);
4011 return ERR_PTR(-ERANGE);
4012 }
4013 part_len = min(seg_len, len_to_track_end);
4014 seg_len -= part_len;
4015 dst += part_len;
4016 idaw_len += part_len;
4017 len_to_track_end -= part_len;
4018 /* collected memory area ends on an IDA_BLOCK border,
4019 * -> create an idaw
4020 * idal_create_words will handle cases where idaw_len
4021 * is larger then IDA_BLOCK_SIZE
4022 */
4023 if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1)))
4024 end_idaw = 1;
4025 /* We also need to end the idaw at track end */
4026 if (!len_to_track_end) {
4027 new_track = 1;
4028 end_idaw = 1;
4029 }
4030 if (end_idaw) {
4031 idaws = idal_create_words(idaws, idaw_dst,
4032 idaw_len);
246ccea1 4033 idaw_dst = NULL;
f3eb5384
SW		 4034 idaw_len = 0;
4035 end_idaw = 0;
4036 }
4037 }
4038 }
4039
4040 if (blk_noretry_request(req) ||
4041 block->base->features & DASD_FEATURE_FAILFAST)
4042 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
4043 cqr->startdev = startdev;
4044 cqr->memdev = startdev;
4045 cqr->block = block;
7c8faa86 4046 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
c9346151 4047 cqr->lpm = dasd_path_get_ppm(startdev);
1f1ee9ad 4048 cqr->retries = startdev->default_retries;
1aae0560 4049 cqr->buildclk = get_tod_clock();
f3eb5384 4050 cqr->status = DASD_CQR_FILLED;
5e2b17e7
JH		 4051
4052 /* Set flags to suppress output for expected errors */
4053 if (dasd_eckd_is_ese(basedev))
4054 set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags);
4055
f3eb5384
SW		 4056 return cqr;
4057}
4058
4059static int prepare_itcw(struct itcw *itcw,
4060 unsigned int trk, unsigned int totrk, int cmd,
4061 struct dasd_device *basedev,
4062 struct dasd_device *startdev,
4063 unsigned int rec_on_trk, int count,
4064 unsigned int blksize,
4065 unsigned int total_data_size,
4066 unsigned int tlf,
4067 unsigned int blk_per_trk)
4068{
4069 struct PFX_eckd_data pfxdata;
4070 struct dasd_eckd_private *basepriv, *startpriv;
4071 struct DE_eckd_data *dedata;
4072 struct LRE_eckd_data *lredata;
4073 struct dcw *dcw;
4074
4075 u32 begcyl, endcyl;
4076 u16 heads, beghead, endhead;
4077 u8 pfx_cmd;
4078
4079 int rc = 0;
4080 int sector = 0;
4081 int dn, d;
4082
4083
4084 /* setup prefix data */
543691a4
SO		 4085 basepriv = basedev->private;
4086 startpriv = startdev->private;
f3eb5384
SW		 4087 dedata = &pfxdata.define_extent;
4088 lredata = &pfxdata.locate_record;
4089
4090 memset(&pfxdata, 0, sizeof(pfxdata));
4091 pfxdata.format = 1; /* PFX with LRE */
4092 pfxdata.base_address = basepriv->ned->unit_addr;
4093 pfxdata.base_lss = basepriv->ned->ID;
4094 pfxdata.validity.define_extent = 1;
4095
4096 /* private uid is kept up to date, conf_data may be outdated */
da340f92
SH		 4097 if (startpriv->uid.type == UA_BASE_PAV_ALIAS)
4098 pfxdata.validity.verify_base = 1;
4099
4100 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) {
f3eb5384 4101 pfxdata.validity.verify_base = 1;
da340f92 4102 pfxdata.validity.hyper_pav = 1;
f3eb5384
SW		 4103 }
4104
4105 switch (cmd) {
4106 case DASD_ECKD_CCW_READ_TRACK_DATA:
4107 dedata->mask.perm = 0x1;
4108 dedata->attributes.operation = basepriv->attrib.operation;
4109 dedata->blk_size = blksize;
4110 dedata->ga_extended |= 0x42;
4111 lredata->operation.orientation = 0x0;
4112 lredata->operation.operation = 0x0C;
4113 lredata->auxiliary.check_bytes = 0x01;
4114 pfx_cmd = DASD_ECKD_CCW_PFX_READ;
4115 break;
4116 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
4117 dedata->mask.perm = 0x02;
4118 dedata->attributes.operation = basepriv->attrib.operation;
4119 dedata->blk_size = blksize;
5628683c 4120 rc = set_timestamp(NULL, dedata, basedev);
f3eb5384
SW		 4121 dedata->ga_extended |= 0x42;
4122 lredata->operation.orientation = 0x0;
4123 lredata->operation.operation = 0x3F;
4124 lredata->extended_operation = 0x23;
4125 lredata->auxiliary.check_bytes = 0x2;
45f186be
JH		 4126 /*
4127 * If XRC is supported the System Time Stamp is set. The
4128 * validity of the time stamp must be reflected in the prefix
4129 * data as well.
4130 */
4131 if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02)
4132 pfxdata.validity.time_stamp = 1; /* 'Time Stamp Valid' */
f3eb5384
SW		 4133 pfx_cmd = DASD_ECKD_CCW_PFX;
4134 break;
8fd57520
JH		 4135 case DASD_ECKD_CCW_READ_COUNT_MT:
4136 dedata->mask.perm = 0x1;
4137 dedata->attributes.operation = DASD_BYPASS_CACHE;
4138 dedata->ga_extended |= 0x42;
4139 dedata->blk_size = blksize;
4140 lredata->operation.orientation = 0x2;
4141 lredata->operation.operation = 0x16;
4142 lredata->auxiliary.check_bytes = 0x01;
4143 pfx_cmd = DASD_ECKD_CCW_PFX_READ;
4144 break;
f3eb5384
SW		 4145 default:
4146 DBF_DEV_EVENT(DBF_ERR, basedev,
4147 "prepare itcw, unknown opcode 0x%x", cmd);
4148 BUG();
4149 break;
4150 }
4151 if (rc)
4152 return rc;
4153
4154 dedata->attributes.mode = 0x3; /* ECKD */
4155
4156 heads = basepriv->rdc_data.trk_per_cyl;
4157 begcyl = trk / heads;
4158 beghead = trk % heads;
4159 endcyl = totrk / heads;
4160 endhead = totrk % heads;
4161
4162 /* check for sequential prestage - enhance cylinder range */
4163 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE ||
4164 dedata->attributes.operation == DASD_SEQ_ACCESS) {
4165
4166 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl)
4167 endcyl += basepriv->attrib.nr_cyl;
4168 else
4169 endcyl = (basepriv->real_cyl - 1);
4170 }
4171
4172 set_ch_t(&dedata->beg_ext, begcyl, beghead);
4173 set_ch_t(&dedata->end_ext, endcyl, endhead);
4174
4175 dedata->ep_format = 0x20; /* records per track is valid */
4176 dedata->ep_rec_per_track = blk_per_trk;
4177
4178 if (rec_on_trk) {
4179 switch (basepriv->rdc_data.dev_type) {
4180 case 0x3390:
4181 dn = ceil_quot(blksize + 6, 232);
4182 d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34);
4183 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
4184 break;
4185 case 0x3380:
4186 d = 7 + ceil_quot(blksize + 12, 32);
4187 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
4188 break;
4189 }
4190 }
4191
8fd57520
JH		 4192 if (cmd == DASD_ECKD_CCW_READ_COUNT_MT) {
4193 lredata->auxiliary.length_valid = 0;
4194 lredata->auxiliary.length_scope = 0;
4195 lredata->sector = 0xff;
4196 } else {
4197 lredata->auxiliary.length_valid = 1;
4198 lredata->auxiliary.length_scope = 1;
4199 lredata->sector = sector;
4200 }
f3eb5384
SW		 4201 lredata->auxiliary.imbedded_ccw_valid = 1;
4202 lredata->length = tlf;
4203 lredata->imbedded_ccw = cmd;
4204 lredata->count = count;
f3eb5384
SW		 4205 set_ch_t(&lredata->seek_addr, begcyl, beghead);
4206 lredata->search_arg.cyl = lredata->seek_addr.cyl;
4207 lredata->search_arg.head = lredata->seek_addr.head;
4208 lredata->search_arg.record = rec_on_trk;
4209
4210 dcw = itcw_add_dcw(itcw, pfx_cmd, 0,
4211 &pfxdata, sizeof(pfxdata), total_data_size);
757853ea 4212 return PTR_ERR_OR_ZERO(dcw);
f3eb5384
SW		 4213}
4214
4215static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track(
4216 struct dasd_device *startdev,
4217 struct dasd_block *block,
4218 struct request *req,
4219 sector_t first_rec,
4220 sector_t last_rec,
4221 sector_t first_trk,
4222 sector_t last_trk,
4223 unsigned int first_offs,
4224 unsigned int last_offs,
4225 unsigned int blk_per_trk,
4226 unsigned int blksize)
4227{
f3eb5384
SW		 4228 struct dasd_ccw_req *cqr;
4229 struct req_iterator iter;
7988613b 4230 struct bio_vec bv;
f3eb5384
SW		 4231 char *dst;
4232 unsigned int trkcount, ctidaw;
4233 unsigned char cmd;
4234 struct dasd_device *basedev;
4235 unsigned int tlf;
4236 struct itcw *itcw;
4237 struct tidaw *last_tidaw = NULL;
4238 int itcw_op;
4239 size_t itcw_size;
ef19298b
SW		 4240 u8 tidaw_flags;
4241 unsigned int seg_len, part_len, len_to_track_end;
4242 unsigned char new_track;
4243 sector_t recid, trkid;
4244 unsigned int offs;
4245 unsigned int count, count_to_trk_end;
cd10502b 4246 int ret;
f3eb5384
SW		 4247
4248 basedev = block->base;
f3eb5384
SW		 4249 if (rq_data_dir(req) == READ) {
4250 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
4251 itcw_op = ITCW_OP_READ;
4252 } else if (rq_data_dir(req) == WRITE) {
4253 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
4254 itcw_op = ITCW_OP_WRITE;
4255 } else
4256 return ERR_PTR(-EINVAL);
4257
4258 /* trackbased I/O needs address all memory via TIDAWs,
4259 * not just for 64 bit addresses. This allows us to map
4260 * each segment directly to one tidaw.
ef19298b
SW		 4261 * In the case of write requests, additional tidaws may
4262 * be needed when a segment crosses a track boundary.
f3eb5384
SW		 4263 */
4264 trkcount = last_trk - first_trk + 1;
4265 ctidaw = 0;
4266 rq_for_each_segment(bv, req, iter) {
4267 ++ctidaw;
4268 }
ef19298b
SW		 4269 if (rq_data_dir(req) == WRITE)
4270 ctidaw += (last_trk - first_trk);
f3eb5384
SW		 4271
4272 /* Allocate the ccw request. */
4273 itcw_size = itcw_calc_size(0, ctidaw, 0);
c5205f2f
SO		 4274 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev,
4275 blk_mq_rq_to_pdu(req));
f3eb5384
SW		 4276 if (IS_ERR(cqr))
4277 return cqr;
4278
f3eb5384
SW		 4279 /* transfer length factor: how many bytes to read from the last track */
4280 if (first_trk == last_trk)
4281 tlf = last_offs - first_offs + 1;
4282 else
4283 tlf = last_offs + 1;
4284 tlf *= blksize;
4285
4286 itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0);
ef19298b 4287 if (IS_ERR(itcw)) {
cd10502b
JL		 4288 ret = -EINVAL;
4289 goto out_error;
ef19298b 4290 }
f3eb5384 4291 cqr->cpaddr = itcw_get_tcw(itcw);
f3eb5384
SW		 4292 if (prepare_itcw(itcw, first_trk, last_trk,
4293 cmd, basedev, startdev,
4294 first_offs + 1,
4295 trkcount, blksize,
4296 (last_rec - first_rec + 1) * blksize,
4297 tlf, blk_per_trk) == -EAGAIN) {
4298 /* Clock not in sync and XRC is enabled.
4299 * Try again later.
4300 */
cd10502b
JL		 4301 ret = -EAGAIN;
4302 goto out_error;
f3eb5384 4303 }
d54cddb6 4304 len_to_track_end = 0;
f3eb5384
SW		 4305 /*
4306 * A tidaw can address 4k of memory, but must not cross page boundaries
4307 * We can let the block layer handle this by setting
4308 * blk_queue_segment_boundary to page boundaries and
4309 * blk_max_segment_size to page size when setting up the request queue.
ef19298b
SW		 4310 * For write requests, a TIDAW must not cross track boundaries, because
4311 * we have to set the CBC flag on the last tidaw for each track.
f3eb5384 4312 */
ef19298b
SW		 4313 if (rq_data_dir(req) == WRITE) {
4314 new_track = 1;
4315 recid = first_rec;
4316 rq_for_each_segment(bv, req, iter) {
7988613b
KO		 4317 dst = page_address(bv.bv_page) + bv.bv_offset;
4318 seg_len = bv.bv_len;
ef19298b
SW		 4319 while (seg_len) {
4320 if (new_track) {
4321 trkid = recid;
4322 offs = sector_div(trkid, blk_per_trk);
4323 count_to_trk_end = blk_per_trk - offs;
4324 count = min((last_rec - recid + 1),
4325 (sector_t)count_to_trk_end);
4326 len_to_track_end = count * blksize;
4327 recid += count;
4328 new_track = 0;
4329 }
4330 part_len = min(seg_len, len_to_track_end);
4331 seg_len -= part_len;
4332 len_to_track_end -= part_len;
4333 /* We need to end the tidaw at track end */
4334 if (!len_to_track_end) {
4335 new_track = 1;
4336 tidaw_flags = TIDAW_FLAGS_INSERT_CBC;
4337 } else
4338 tidaw_flags = 0;
4339 last_tidaw = itcw_add_tidaw(itcw, tidaw_flags,
4340 dst, part_len);
cd10502b
JL		 4341 if (IS_ERR(last_tidaw)) {
4342 ret = -EINVAL;
4343 goto out_error;
4344 }
ef19298b
SW		 4345 dst += part_len;
4346 }
4347 }
4348 } else {
4349 rq_for_each_segment(bv, req, iter) {
7988613b 4350 dst = page_address(bv.bv_page) + bv.bv_offset;
ef19298b 4351 last_tidaw = itcw_add_tidaw(itcw, 0x00,
7988613b 4352 dst, bv.bv_len);
cd10502b
JL		 4353 if (IS_ERR(last_tidaw)) {
4354 ret = -EINVAL;
4355 goto out_error;
4356 }
ef19298b 4357 }
f3eb5384 4358 }
ef19298b
SW		 4359 last_tidaw->flags |= TIDAW_FLAGS_LAST;
4360 last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC;
f3eb5384
SW		 4361 itcw_finalize(itcw);
4362
4363 if (blk_noretry_request(req) ||
4364 block->base->features & DASD_FEATURE_FAILFAST)
4365 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
ef19298b 4366 cqr->cpmode = 1;
f3eb5384
SW		 4367 cqr->startdev = startdev;
4368 cqr->memdev = startdev;
4369 cqr->block = block;
7c8faa86 4370 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
c9346151 4371 cqr->lpm = dasd_path_get_ppm(startdev);
1f1ee9ad 4372 cqr->retries = startdev->default_retries;
1aae0560 4373 cqr->buildclk = get_tod_clock();
f3eb5384 4374 cqr->status = DASD_CQR_FILLED;
5e2b17e7
JH		 4375
4376 /* Set flags to suppress output for expected errors */
4377 if (dasd_eckd_is_ese(basedev)) {
4378 set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags);
4379 set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags);
4380 set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags);
4381 }
4382
f3eb5384 4383 return cqr;
cd10502b
JL		 4384out_error:
4385 dasd_sfree_request(cqr, startdev);
4386 return ERR_PTR(ret);
f3eb5384
SW		 4387}
4388
4389static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev,
4390 struct dasd_block *block,
4391 struct request *req)
4392{
ef19298b 4393 int cmdrtd, cmdwtd;
f3eb5384 4394 int use_prefix;
ef19298b 4395 int fcx_multitrack;
45b44d76 4396 struct dasd_eckd_private *private;
f3eb5384
SW		 4397 struct dasd_device *basedev;
4398 sector_t first_rec, last_rec;
4399 sector_t first_trk, last_trk;
4400 unsigned int first_offs, last_offs;
4401 unsigned int blk_per_trk, blksize;
4402 int cdlspecial;
ef19298b 4403 unsigned int data_size;
f3eb5384
SW		 4404 struct dasd_ccw_req *cqr;
4405
4406 basedev = block->base;
543691a4 4407 private = basedev->private;
f3eb5384
SW		 4408
4409 /* Calculate number of blocks/records per track. */
4410 blksize = block->bp_block;
4411 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
6fca97a9
SH		 4412 if (blk_per_trk == 0)
4413 return ERR_PTR(-EINVAL);
f3eb5384 4414 /* Calculate record id of first and last block. */
83096ebf 4415 first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift;
f3eb5384
SW		 4416 first_offs = sector_div(first_trk, blk_per_trk);
4417 last_rec = last_trk =
83096ebf 4418 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift;
f3eb5384
SW		 4419 last_offs = sector_div(last_trk, blk_per_trk);
4420 cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk);
4421
ef19298b
SW		 4422 fcx_multitrack = private->features.feature[40] & 0x20;
4423 data_size = blk_rq_bytes(req);
26a35f37
SW		 4424 if (data_size % blksize)
4425 return ERR_PTR(-EINVAL);
ef19298b
SW		 4426 /* tpm write request add CBC data on each track boundary */
4427 if (rq_data_dir(req) == WRITE)
4428 data_size += (last_trk - first_trk) * 4;
f3eb5384
SW		 4429
4430 /* is read track data and write track data in command mode supported? */
4431 cmdrtd = private->features.feature[9] & 0x20;
4432 cmdwtd = private->features.feature[12] & 0x40;
4433 use_prefix = private->features.feature[8] & 0x01;
4434
4435 cqr = NULL;
4436 if (cdlspecial || dasd_page_cache) {
4437 /* do nothing, just fall through to the cmd mode single case */
ef19298b
SW		 4438 } else if ((data_size <= private->fcx_max_data)
4439 && (fcx_multitrack || (first_trk == last_trk))) {
f3eb5384
SW		 4440 cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req,
4441 first_rec, last_rec,
4442 first_trk, last_trk,
4443 first_offs, last_offs,
4444 blk_per_trk, blksize);
ef19298b
SW		 4445 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) &&
4446 (PTR_ERR(cqr) != -ENOMEM))
f3eb5384
SW		 4447 cqr = NULL;
4448 } else if (use_prefix &&
4449 (((rq_data_dir(req) == READ) && cmdrtd) ||
4450 ((rq_data_dir(req) == WRITE) && cmdwtd))) {
4451 cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req,
4452 first_rec, last_rec,
4453 first_trk, last_trk,
4454 first_offs, last_offs,
4455 blk_per_trk, blksize);
ef19298b
SW		 4456 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) &&
4457 (PTR_ERR(cqr) != -ENOMEM))
f3eb5384
SW		 4458 cqr = NULL;
4459 }
4460 if (!cqr)
4461 cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req,
4462 first_rec, last_rec,
4463 first_trk, last_trk,
4464 first_offs, last_offs,
4465 blk_per_trk, blksize);
4466 return cqr;
4467}
4468
bbc7f7ea
JH		 4469static struct dasd_ccw_req *dasd_eckd_build_cp_raw(struct dasd_device *startdev,
4470 struct dasd_block *block,
4471 struct request *req)
e4dbb0f2 4472{
9d2be0c1
JH		 4473 sector_t start_padding_sectors, end_sector_offset, end_padding_sectors;
4474 unsigned int seg_len, len_to_track_end;
4475 unsigned int cidaw, cplength, datasize;
4476 sector_t first_trk, last_trk, sectors;
4477 struct dasd_eckd_private *base_priv;
e4dbb0f2 4478 struct dasd_device *basedev;
e4dbb0f2 4479 struct req_iterator iter;
9d2be0c1
JH		 4480 struct dasd_ccw_req *cqr;
4481 unsigned int first_offs;
4482 unsigned int trkcount;
4483 unsigned long *idaws;
4484 unsigned int size;
4485 unsigned char cmd;
7988613b 4486 struct bio_vec bv;
9d2be0c1
JH		 4487 struct ccw1 *ccw;
4488 int use_prefix;
4489 void *data;
e4dbb0f2 4490 char *dst;
e4dbb0f2
SH		 4491
4492 /*
4493 * raw track access needs to be mutiple of 64k and on 64k boundary
558b9ef0
SW		 4494 * For read requests we can fix an incorrect alignment by padding
4495 * the request with dummy pages.
e4dbb0f2 4496 */
558b9ef0
SW		 4497 start_padding_sectors = blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK;
4498 end_sector_offset = (blk_rq_pos(req) + blk_rq_sectors(req)) %
4499 DASD_RAW_SECTORS_PER_TRACK;
4500 end_padding_sectors = (DASD_RAW_SECTORS_PER_TRACK - end_sector_offset) %
4501 DASD_RAW_SECTORS_PER_TRACK;
4502 basedev = block->base;
4503 if ((start_padding_sectors || end_padding_sectors) &&
4504 (rq_data_dir(req) == WRITE)) {
4505 DBF_DEV_EVENT(DBF_ERR, basedev,
e78c21d1 4506 "raw write not track aligned (%llu,%llu) req %p",
558b9ef0 4507 start_padding_sectors, end_padding_sectors, req);
9d2be0c1 4508 return ERR_PTR(-EINVAL);
e4dbb0f2
SH		 4509 }
4510
4511 first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK;
4512 last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) /
4513 DASD_RAW_SECTORS_PER_TRACK;
4514 trkcount = last_trk - first_trk + 1;
4515 first_offs = 0;
e4dbb0f2
SH		 4516
4517 if (rq_data_dir(req) == READ)
4518 cmd = DASD_ECKD_CCW_READ_TRACK;
4519 else if (rq_data_dir(req) == WRITE)
4520 cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK;
9d2be0c1
JH		 4521 else
4522 return ERR_PTR(-EINVAL);
e4dbb0f2
SH		 4523
4524 /*
4525 * Raw track based I/O needs IDAWs for each page,
4526 * and not just for 64 bit addresses.
4527 */
4528 cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK;
4529
e4dbb0f2 4530 /*
9d2be0c1
JH		 4531 * struct PFX_eckd_data and struct LRE_eckd_data can have up to 2 bytes
4532 * of extended parameter. This is needed for write full track.
e4dbb0f2 4533 */
9d2be0c1
JH		 4534 base_priv = basedev->private;
4535 use_prefix = base_priv->features.feature[8] & 0x01;
4536 if (use_prefix) {
4537 cplength = 1 + trkcount;
4538 size = sizeof(struct PFX_eckd_data) + 2;
4539 } else {
4540 cplength = 2 + trkcount;
4541 size = sizeof(struct DE_eckd_data) +
4542 sizeof(struct LRE_eckd_data) + 2;
4543 }
4544 size = ALIGN(size, 8);
e4dbb0f2 4545
7bf76f01 4546 datasize = size + cidaw * sizeof(unsigned long);
e4dbb0f2
SH		 4547
4548 /* Allocate the ccw request. */
4549 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength,
c5205f2f 4550 datasize, startdev, blk_mq_rq_to_pdu(req));
e4dbb0f2 4551 if (IS_ERR(cqr))
9d2be0c1
JH		 4552 return cqr;
4553
e4dbb0f2 4554 ccw = cqr->cpaddr;
9d2be0c1 4555 data = cqr->data;
e4dbb0f2 4556
9d2be0c1
JH		 4557 if (use_prefix) {
4558 prefix_LRE(ccw++, data, first_trk, last_trk, cmd, basedev,
4559 startdev, 1, first_offs + 1, trkcount, 0, 0);
4560 } else {
4561 define_extent(ccw++, data, first_trk, last_trk, cmd, basedev, 0);
4562 ccw[-1].flags |= CCW_FLAG_CC;
4563
4564 data += sizeof(struct DE_eckd_data);
4565 locate_record_ext(ccw++, data, first_trk, first_offs + 1,
4566 trkcount, cmd, basedev, 0, 0);
e4dbb0f2
SH		 4567 }
4568
9d2be0c1 4569 idaws = (unsigned long *)(cqr->data + size);
e4dbb0f2 4570 len_to_track_end = 0;
558b9ef0
SW		 4571 if (start_padding_sectors) {
4572 ccw[-1].flags |= CCW_FLAG_CC;
4573 ccw->cmd_code = cmd;
4574 /* maximum 3390 track size */
4575 ccw->count = 57326;
4576 /* 64k map to one track */
4577 len_to_track_end = 65536 - start_padding_sectors * 512;
4578 ccw->cda = (__u32)(addr_t)idaws;
4579 ccw->flags |= CCW_FLAG_IDA;
4580 ccw->flags |= CCW_FLAG_SLI;
4581 ccw++;
4582 for (sectors = 0; sectors < start_padding_sectors; sectors += 8)
4583 idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE);
4584 }
e4dbb0f2 4585 rq_for_each_segment(bv, req, iter) {
7988613b
KO		 4586 dst = page_address(bv.bv_page) + bv.bv_offset;
4587 seg_len = bv.bv_len;
558b9ef0
SW		 4588 if (cmd == DASD_ECKD_CCW_READ_TRACK)
4589 memset(dst, 0, seg_len);
e4dbb0f2
SH		 4590 if (!len_to_track_end) {
4591 ccw[-1].flags |= CCW_FLAG_CC;
4592 ccw->cmd_code = cmd;
4593 /* maximum 3390 track size */
4594 ccw->count = 57326;
4595 /* 64k map to one track */
4596 len_to_track_end = 65536;
4597 ccw->cda = (__u32)(addr_t)idaws;
4598 ccw->flags |= CCW_FLAG_IDA;
4599 ccw->flags |= CCW_FLAG_SLI;
4600 ccw++;
4601 }
4602 len_to_track_end -= seg_len;
4603 idaws = idal_create_words(idaws, dst, seg_len);
4604 }
558b9ef0
SW		 4605 for (sectors = 0; sectors < end_padding_sectors; sectors += 8)
4606 idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE);
e4dbb0f2
SH		 4607 if (blk_noretry_request(req) ||
4608 block->base->features & DASD_FEATURE_FAILFAST)
4609 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
4610 cqr->startdev = startdev;
4611 cqr->memdev = startdev;
4612 cqr->block = block;
4613 cqr->expires = startdev->default_expires * HZ;
c9346151 4614 cqr->lpm = dasd_path_get_ppm(startdev);
1f1ee9ad 4615 cqr->retries = startdev->default_retries;
1aae0560 4616 cqr->buildclk = get_tod_clock();
e4dbb0f2
SH		 4617 cqr->status = DASD_CQR_FILLED;
4618
e4dbb0f2
SH		 4619 return cqr;
4620}
4621
4622
1da177e4
LT		 4623static int
4624dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req)
4625{
4626 struct dasd_eckd_private *private;
4627 struct ccw1 *ccw;
5705f702 4628 struct req_iterator iter;
7988613b 4629 struct bio_vec bv;
1da177e4
LT		 4630 char *dst, *cda;
4631 unsigned int blksize, blk_per_trk, off;
4632 sector_t recid;
5705f702 4633 int status;
1da177e4
LT		 4634
4635 if (!dasd_page_cache)
4636 goto out;
543691a4 4637 private = cqr->block->base->private;
8e09f215 4638 blksize = cqr->block->bp_block;
1da177e4 4639 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
83096ebf 4640 recid = blk_rq_pos(req) >> cqr->block->s2b_shift;
1da177e4
LT		 4641 ccw = cqr->cpaddr;
4642 /* Skip over define extent & locate record. */
4643 ccw++;
4644 if (private->uses_cdl == 0 || recid > 2*blk_per_trk)
4645 ccw++;
5705f702 4646 rq_for_each_segment(bv, req, iter) {
7988613b
KO		 4647 dst = page_address(bv.bv_page) + bv.bv_offset;
4648 for (off = 0; off < bv.bv_len; off += blksize) {
1da177e4
LT		 4649 /* Skip locate record. */
4650 if (private->uses_cdl && recid <= 2*blk_per_trk)
4651 ccw++;
4652 if (dst) {
4653 if (ccw->flags & CCW_FLAG_IDA)
4654 cda = *((char **)((addr_t) ccw->cda));
4655 else
4656 cda = (char *)((addr_t) ccw->cda);
4657 if (dst != cda) {
4658 if (rq_data_dir(req) == READ)
7988613b 4659 memcpy(dst, cda, bv.bv_len);
1da177e4
LT		 4660 kmem_cache_free(dasd_page_cache,
4661 (void *)((addr_t)cda & PAGE_MASK));
4662 }
4663 dst = NULL;
4664 }
4665 ccw++;
4666 recid++;
4667 }
4668 }
4669out:
4670 status = cqr->status == DASD_CQR_DONE;
8e09f215 4671 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 4672 return status;
4673}
4674
8e09f215 4675/*
f3eb5384 4676 * Modify ccw/tcw in cqr so it can be started on a base device.
8e09f215
SW		 4677 *
4678 * Note that this is not enough to restart the cqr!
4679 * Either reset cqr->startdev as well (summary unit check handling)
4680 * or restart via separate cqr (as in ERP handling).
4681 */
4682void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr)
4683{
4684 struct ccw1 *ccw;
4685 struct PFX_eckd_data *pfxdata;
f3eb5384
SW		 4686 struct tcw *tcw;
4687 struct tccb *tccb;
4688 struct dcw *dcw;
4689
4690 if (cqr->cpmode == 1) {
4691 tcw = cqr->cpaddr;
4692 tccb = tcw_get_tccb(tcw);
4693 dcw = (struct dcw *)&tccb->tca[0];
4694 pfxdata = (struct PFX_eckd_data *)&dcw->cd[0];
8e09f215
SW		 4695 pfxdata->validity.verify_base = 0;
4696 pfxdata->validity.hyper_pav = 0;
f3eb5384
SW		 4697 } else {
4698 ccw = cqr->cpaddr;
4699 pfxdata = cqr->data;
4700 if (ccw->cmd_code == DASD_ECKD_CCW_PFX) {
4701 pfxdata->validity.verify_base = 0;
4702 pfxdata->validity.hyper_pav = 0;
4703 }
8e09f215
SW		 4704 }
4705}
4706
4707#define DASD_ECKD_CHANQ_MAX_SIZE 4
4708
4709static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base,
4710 struct dasd_block *block,
4711 struct request *req)
4712{
4713 struct dasd_eckd_private *private;
964ce509 4714 struct dasd_device *startdev;
7e64db15 4715 unsigned long flags;
964ce509 4716 struct dasd_ccw_req *cqr;
8e09f215 4717
964ce509 4718 startdev = dasd_alias_get_start_dev(base);
8e09f215
SW		 4719 if (!startdev)
4720 startdev = base;
543691a4 4721 private = startdev->private;
8e09f215
SW		 4722 if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE)
4723 return ERR_PTR(-EBUSY);
4724
4725 spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags);
4726 private->count++;
e4dbb0f2 4727 if ((base->features & DASD_FEATURE_USERAW))
bbc7f7ea 4728 cqr = dasd_eckd_build_cp_raw(startdev, block, req);
e4dbb0f2
SH		 4729 else
4730 cqr = dasd_eckd_build_cp(startdev, block, req);
8e09f215
SW		 4731 if (IS_ERR(cqr))
4732 private->count--;
4733 spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags);
4734 return cqr;
4735}
4736
4737static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr,
4738 struct request *req)
4739{
4740 struct dasd_eckd_private *private;
4741 unsigned long flags;
4742
4743 spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags);
543691a4 4744 private = cqr->memdev->private;
8e09f215
SW		 4745 private->count--;
4746 spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags);
4747 return dasd_eckd_free_cp(cqr, req);
4748}
4749
1da177e4
LT		 4750static int
4751dasd_eckd_fill_info(struct dasd_device * device,
4752 struct dasd_information2_t * info)
4753{
543691a4 4754 struct dasd_eckd_private *private = device->private;
1da177e4 4755
1da177e4
LT		 4756 info->label_block = 2;
4757 info->FBA_layout = private->uses_cdl ? 0 : 1;
4758 info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL;
543691a4 4759 info->characteristics_size = sizeof(private->rdc_data);
1da177e4 4760 memcpy(info->characteristics, &private->rdc_data,
543691a4 4761 sizeof(private->rdc_data));
4abb08c2
SW		 4762 info->confdata_size = min((unsigned long)private->conf_len,
4763 sizeof(info->configuration_data));
4764 memcpy(info->configuration_data, private->conf_data,
4765 info->confdata_size);
1da177e4
LT		 4766 return 0;
4767}
4768
4769/*
4770 * SECTION: ioctl functions for eckd devices.
4771 */
4772
4773/*
4774 * Release device ioctl.
138c014d 4775 * Buils a channel programm to releases a prior reserved
1da177e4
LT		 4776 * (see dasd_eckd_reserve) device.
4777 */
4778static int
1107ccfb 4779dasd_eckd_release(struct dasd_device *device)
1da177e4 4780{
1da177e4
LT		 4781 struct dasd_ccw_req *cqr;
4782 int rc;
f3eb5384 4783 struct ccw1 *ccw;
f932bcea 4784 int useglobal;
1da177e4
LT		 4785
4786 if (!capable(CAP_SYS_ADMIN))
4787 return -EACCES;
4788
f932bcea 4789 useglobal = 0;
c5205f2f 4790 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL);
1da177e4 4791 if (IS_ERR(cqr)) {
f932bcea
SW		 4792 mutex_lock(&dasd_reserve_mutex);
4793 useglobal = 1;
4794 cqr = &dasd_reserve_req->cqr;
4795 memset(cqr, 0, sizeof(*cqr));
4796 memset(&dasd_reserve_req->ccw, 0,
4797 sizeof(dasd_reserve_req->ccw));
4798 cqr->cpaddr = &dasd_reserve_req->ccw;
4799 cqr->data = &dasd_reserve_req->data;
4800 cqr->magic = DASD_ECKD_MAGIC;
1da177e4 4801 }
f3eb5384
SW		 4802 ccw = cqr->cpaddr;
4803 ccw->cmd_code = DASD_ECKD_CCW_RELEASE;
4804 ccw->flags |= CCW_FLAG_SLI;
4805 ccw->count = 32;
4806 ccw->cda = (__u32)(addr_t) cqr->data;
8e09f215
SW		 4807 cqr->startdev = device;
4808 cqr->memdev = device;
1da177e4 4809 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1c01b8a5 4810 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
336c340b 4811 cqr->retries = 2; /* set retry counter to enable basic ERP */
1da177e4 4812 cqr->expires = 2 * HZ;
1aae0560 4813 cqr->buildclk = get_tod_clock();
1da177e4
LT		 4814 cqr->status = DASD_CQR_FILLED;
4815
4816 rc = dasd_sleep_on_immediatly(cqr);
5a27e60d
SW		 4817 if (!rc)
4818 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags);
1da177e4 4819
f932bcea
SW		 4820 if (useglobal)
4821 mutex_unlock(&dasd_reserve_mutex);
4822 else
4823 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 4824 return rc;
4825}
4826
4827/*
4828 * Reserve device ioctl.
4829 * Options are set to 'synchronous wait for interrupt' and
138c014d
HH		 4830 * 'timeout the request'. This leads to a terminate IO if
4831 * the interrupt is outstanding for a certain time.
1da177e4
LT		 4832 */
4833static int
1107ccfb 4834dasd_eckd_reserve(struct dasd_device *device)
1da177e4 4835{
1da177e4
LT		 4836 struct dasd_ccw_req *cqr;
4837 int rc;
f3eb5384 4838 struct ccw1 *ccw;
f932bcea 4839 int useglobal;
1da177e4
LT		 4840
4841 if (!capable(CAP_SYS_ADMIN))
4842 return -EACCES;
4843
f932bcea 4844 useglobal = 0;
c5205f2f 4845 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL);
1da177e4 4846 if (IS_ERR(cqr)) {
f932bcea
SW		 4847 mutex_lock(&dasd_reserve_mutex);
4848 useglobal = 1;
4849 cqr = &dasd_reserve_req->cqr;
4850 memset(cqr, 0, sizeof(*cqr));
4851 memset(&dasd_reserve_req->ccw, 0,
4852 sizeof(dasd_reserve_req->ccw));
4853 cqr->cpaddr = &dasd_reserve_req->ccw;
4854 cqr->data = &dasd_reserve_req->data;
4855 cqr->magic = DASD_ECKD_MAGIC;
1da177e4 4856 }
f3eb5384
SW		 4857 ccw = cqr->cpaddr;
4858 ccw->cmd_code = DASD_ECKD_CCW_RESERVE;
4859 ccw->flags |= CCW_FLAG_SLI;
4860 ccw->count = 32;
4861 ccw->cda = (__u32)(addr_t) cqr->data;
8e09f215
SW		 4862 cqr->startdev = device;
4863 cqr->memdev = device;
1da177e4 4864 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1c01b8a5 4865 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
336c340b 4866 cqr->retries = 2; /* set retry counter to enable basic ERP */
1da177e4 4867 cqr->expires = 2 * HZ;
1aae0560 4868 cqr->buildclk = get_tod_clock();
1da177e4
LT		 4869 cqr->status = DASD_CQR_FILLED;
4870
4871 rc = dasd_sleep_on_immediatly(cqr);
5a27e60d
SW		 4872 if (!rc)
4873 set_bit(DASD_FLAG_IS_RESERVED, &device->flags);
1da177e4 4874
f932bcea
SW		 4875 if (useglobal)
4876 mutex_unlock(&dasd_reserve_mutex);
4877 else
4878 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 4879 return rc;
4880}
4881
4882/*
4883 * Steal lock ioctl - unconditional reserve device.
138c014d 4884 * Buils a channel programm to break a device's reservation.
1da177e4
LT		 4885 * (unconditional reserve)
4886 */
4887static int
1107ccfb 4888dasd_eckd_steal_lock(struct dasd_device *device)
1da177e4 4889{
1da177e4
LT		 4890 struct dasd_ccw_req *cqr;
4891 int rc;
f3eb5384 4892 struct ccw1 *ccw;
f932bcea 4893 int useglobal;
1da177e4
LT		 4894
4895 if (!capable(CAP_SYS_ADMIN))
4896 return -EACCES;
4897
f932bcea 4898 useglobal = 0;
c5205f2f 4899 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL);
1da177e4 4900 if (IS_ERR(cqr)) {
f932bcea
SW		 4901 mutex_lock(&dasd_reserve_mutex);
4902 useglobal = 1;
4903 cqr = &dasd_reserve_req->cqr;
4904 memset(cqr, 0, sizeof(*cqr));
4905 memset(&dasd_reserve_req->ccw, 0,
4906 sizeof(dasd_reserve_req->ccw));
4907 cqr->cpaddr = &dasd_reserve_req->ccw;
4908 cqr->data = &dasd_reserve_req->data;
4909 cqr->magic = DASD_ECKD_MAGIC;
1da177e4 4910 }
f3eb5384
SW		 4911 ccw = cqr->cpaddr;
4912 ccw->cmd_code = DASD_ECKD_CCW_SLCK;
4913 ccw->flags |= CCW_FLAG_SLI;
4914 ccw->count = 32;
4915 ccw->cda = (__u32)(addr_t) cqr->data;
8e09f215
SW		 4916 cqr->startdev = device;
4917 cqr->memdev = device;
1da177e4 4918 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1c01b8a5 4919 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
336c340b 4920 cqr->retries = 2; /* set retry counter to enable basic ERP */
1da177e4 4921 cqr->expires = 2 * HZ;
1aae0560 4922 cqr->buildclk = get_tod_clock();
1da177e4
LT		 4923 cqr->status = DASD_CQR_FILLED;
4924
4925 rc = dasd_sleep_on_immediatly(cqr);
5a27e60d
SW		 4926 if (!rc)
4927 set_bit(DASD_FLAG_IS_RESERVED, &device->flags);
1da177e4 4928
f932bcea
SW		 4929 if (useglobal)
4930 mutex_unlock(&dasd_reserve_mutex);
4931 else
4932 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 4933 return rc;
4934}
4935
196339f1
SW		 4936/*
4937 * SNID - Sense Path Group ID
4938 * This ioctl may be used in situations where I/O is stalled due to
4939 * a reserve, so if the normal dasd_smalloc_request fails, we use the
4940 * preallocated dasd_reserve_req.
4941 */
4942static int dasd_eckd_snid(struct dasd_device *device,
4943 void __user *argp)
4944{
4945 struct dasd_ccw_req *cqr;
4946 int rc;
4947 struct ccw1 *ccw;
4948 int useglobal;
4949 struct dasd_snid_ioctl_data usrparm;
4950
4951 if (!capable(CAP_SYS_ADMIN))
4952 return -EACCES;
4953
4954 if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
4955 return -EFAULT;
4956
4957 useglobal = 0;
4958 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1,
c5205f2f
SO		 4959 sizeof(struct dasd_snid_data), device,
4960 NULL);
196339f1
SW		 4961 if (IS_ERR(cqr)) {
4962 mutex_lock(&dasd_reserve_mutex);
4963 useglobal = 1;
4964 cqr = &dasd_reserve_req->cqr;
4965 memset(cqr, 0, sizeof(*cqr));
4966 memset(&dasd_reserve_req->ccw, 0,
4967 sizeof(dasd_reserve_req->ccw));
4968 cqr->cpaddr = &dasd_reserve_req->ccw;
4969 cqr->data = &dasd_reserve_req->data;
4970 cqr->magic = DASD_ECKD_MAGIC;
4971 }
4972 ccw = cqr->cpaddr;
4973 ccw->cmd_code = DASD_ECKD_CCW_SNID;
4974 ccw->flags |= CCW_FLAG_SLI;
4975 ccw->count = 12;
4976 ccw->cda = (__u32)(addr_t) cqr->data;
4977 cqr->startdev = device;
4978 cqr->memdev = device;
4979 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
4980 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
5a27e60d 4981 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags);
196339f1
SW		 4982 cqr->retries = 5;
4983 cqr->expires = 10 * HZ;
1aae0560 4984 cqr->buildclk = get_tod_clock();
196339f1
SW		 4985 cqr->status = DASD_CQR_FILLED;
4986 cqr->lpm = usrparm.path_mask;
4987
4988 rc = dasd_sleep_on_immediatly(cqr);
4989 /* verify that I/O processing didn't modify the path mask */
4990 if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask))
4991 rc = -EIO;
4992 if (!rc) {
4993 usrparm.data = *((struct dasd_snid_data *)cqr->data);
4994 if (copy_to_user(argp, &usrparm, sizeof(usrparm)))
4995 rc = -EFAULT;
4996 }
4997
4998 if (useglobal)
4999 mutex_unlock(&dasd_reserve_mutex);
5000 else
5001 dasd_sfree_request(cqr, cqr->memdev);
5002 return rc;
5003}
5004
1da177e4
LT		 5005/*
5006 * Read performance statistics
5007 */
5008static int
1107ccfb 5009dasd_eckd_performance(struct dasd_device *device, void __user *argp)
1da177e4 5010{
1da177e4
LT		 5011 struct dasd_psf_prssd_data *prssdp;
5012 struct dasd_rssd_perf_stats_t *stats;
5013 struct dasd_ccw_req *cqr;
5014 struct ccw1 *ccw;
5015 int rc;
5016
68b781fe 5017 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
8e09f215
SW		 5018 (sizeof(struct dasd_psf_prssd_data) +
5019 sizeof(struct dasd_rssd_perf_stats_t)),
c5205f2f 5020 device, NULL);
1da177e4 5021 if (IS_ERR(cqr)) {
fc19f381 5022 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 5023 "Could not allocate initialization request");
5024 return PTR_ERR(cqr);
5025 }
8e09f215
SW		 5026 cqr->startdev = device;
5027 cqr->memdev = device;
1da177e4 5028 cqr->retries = 0;
eb6e199b 5029 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1da177e4
LT		 5030 cqr->expires = 10 * HZ;
5031
5032 /* Prepare for Read Subsystem Data */
5033 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
8e09f215 5034 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
1da177e4 5035 prssdp->order = PSF_ORDER_PRSSD;
5d67d164 5036 prssdp->suborder = 0x01; /* Performance Statistics */
1da177e4
LT		 5037 prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */
5038
5039 ccw = cqr->cpaddr;
5040 ccw->cmd_code = DASD_ECKD_CCW_PSF;
8e09f215 5041 ccw->count = sizeof(struct dasd_psf_prssd_data);
1da177e4
LT		 5042 ccw->flags |= CCW_FLAG_CC;
5043 ccw->cda = (__u32)(addr_t) prssdp;
5044
5045 /* Read Subsystem Data - Performance Statistics */
5046 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
8e09f215 5047 memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t));
1da177e4
LT		 5048
5049 ccw++;
5050 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
8e09f215 5051 ccw->count = sizeof(struct dasd_rssd_perf_stats_t);
1da177e4
LT		 5052 ccw->cda = (__u32)(addr_t) stats;
5053
1aae0560 5054 cqr->buildclk = get_tod_clock();
1da177e4
LT		 5055 cqr->status = DASD_CQR_FILLED;
5056 rc = dasd_sleep_on(cqr);
5057 if (rc == 0) {
1da177e4
LT		 5058 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
5059 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
1107ccfb
CH		 5060 if (copy_to_user(argp, stats,
5061 sizeof(struct dasd_rssd_perf_stats_t)))
5062 rc = -EFAULT;
1da177e4 5063 }
8e09f215 5064 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 5065 return rc;
5066}
5067
5068/*
5069 * Get attributes (cache operations)
5070 * Returnes the cache attributes used in Define Extend (DE).
5071 */
5072static int
1107ccfb 5073dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp)
1da177e4 5074{
543691a4 5075 struct dasd_eckd_private *private = device->private;
1107ccfb 5076 struct attrib_data_t attrib = private->attrib;
1da177e4
LT		 5077 int rc;
5078
5079 if (!capable(CAP_SYS_ADMIN))
5080 return -EACCES;
1107ccfb 5081 if (!argp)
1da177e4
LT		 5082 return -EINVAL;
5083
1107ccfb
CH		 5084 rc = 0;
5085 if (copy_to_user(argp, (long *) &attrib,
8e09f215 5086 sizeof(struct attrib_data_t)))
1107ccfb 5087 rc = -EFAULT;
1da177e4
LT		 5088
5089 return rc;
5090}
5091
5092/*
5093 * Set attributes (cache operations)
5094 * Stores the attributes for cache operation to be used in Define Extend (DE).
5095 */
5096static int
1107ccfb 5097dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp)
1da177e4 5098{
543691a4 5099 struct dasd_eckd_private *private = device->private;
1da177e4
LT		 5100 struct attrib_data_t attrib;
5101
5102 if (!capable(CAP_SYS_ADMIN))
5103 return -EACCES;
1107ccfb 5104 if (!argp)
1da177e4
LT		 5105 return -EINVAL;
5106
1107ccfb 5107 if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t)))
1da177e4 5108 return -EFAULT;
1da177e4
LT		 5109 private->attrib = attrib;
5110
fc19f381
SH		 5111 dev_info(&device->cdev->dev,
5112 "The DASD cache mode was set to %x (%i cylinder prestage)\n",
5113 private->attrib.operation, private->attrib.nr_cyl);
1da177e4
LT		 5114 return 0;
5115}
5116
ab1d848f
NH		 5117/*
5118 * Issue syscall I/O to EMC Symmetrix array.
5119 * CCWs are PSF and RSSD
5120 */
5121static int dasd_symm_io(struct dasd_device *device, void __user *argp)
5122{
5123 struct dasd_symmio_parms usrparm;
5124 char *psf_data, *rssd_result;
5125 struct dasd_ccw_req *cqr;
5126 struct ccw1 *ccw;
52898025 5127 char psf0, psf1;
ab1d848f
NH		 5128 int rc;
5129
52898025
NH		 5130 if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
5131 return -EACCES;
5132 psf0 = psf1 = 0;
5133
ab1d848f
NH		 5134 /* Copy parms from caller */
5135 rc = -EFAULT;
5136 if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
5137 goto out;
92d62891 5138 if (is_compat_task()) {
f8b06859 5139 /* Make sure pointers are sane even on 31 bit. */
ab1d848f 5140 rc = -EINVAL;
f8b06859
HC		 5141 if ((usrparm.psf_data >> 32) != 0)
5142 goto out;
5143 if ((usrparm.rssd_result >> 32) != 0)
5144 goto out;
5145 usrparm.psf_data &= 0x7fffffffULL;
5146 usrparm.rssd_result &= 0x7fffffffULL;
ab1d848f 5147 }
4a8ef699
SH		 5148 /* at least 2 bytes are accessed and should be allocated */
5149 if (usrparm.psf_data_len < 2) {
5150 DBF_DEV_EVENT(DBF_WARNING, device,
5151 "Symmetrix ioctl invalid data length %d",
5152 usrparm.psf_data_len);
5153 rc = -EINVAL;
5154 goto out;
5155 }
ab1d848f
NH		 5156 /* alloc I/O data area */
5157 psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA);
5158 rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA);
5159 if (!psf_data || !rssd_result) {
5160 rc = -ENOMEM;
5161 goto out_free;
5162 }
5163
5164 /* get syscall header from user space */
5165 rc = -EFAULT;
5166 if (copy_from_user(psf_data,
5167 (void __user *)(unsigned long) usrparm.psf_data,
5168 usrparm.psf_data_len))
5169 goto out_free;
52898025
NH		 5170 psf0 = psf_data[0];
5171 psf1 = psf_data[1];
ab1d848f
NH		 5172
5173 /* setup CCWs for PSF + RSSD */
c5205f2f 5174 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2, 0, device, NULL);
ab1d848f 5175 if (IS_ERR(cqr)) {
fc19f381 5176 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
ab1d848f
NH		 5177 "Could not allocate initialization request");
5178 rc = PTR_ERR(cqr);
5179 goto out_free;
5180 }
5181
5182 cqr->startdev = device;
5183 cqr->memdev = device;
5184 cqr->retries = 3;
5185 cqr->expires = 10 * HZ;
1aae0560 5186 cqr->buildclk = get_tod_clock();
ab1d848f
NH		 5187 cqr->status = DASD_CQR_FILLED;
5188
5189 /* Build the ccws */
5190 ccw = cqr->cpaddr;
5191
5192 /* PSF ccw */
5193 ccw->cmd_code = DASD_ECKD_CCW_PSF;
5194 ccw->count = usrparm.psf_data_len;
5195 ccw->flags |= CCW_FLAG_CC;
5196 ccw->cda = (__u32)(addr_t) psf_data;
5197
5198 ccw++;
5199
5200 /* RSSD ccw */
5201 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
5202 ccw->count = usrparm.rssd_result_len;
5203 ccw->flags = CCW_FLAG_SLI ;
5204 ccw->cda = (__u32)(addr_t) rssd_result;
5205
5206 rc = dasd_sleep_on(cqr);
5207 if (rc)
5208 goto out_sfree;
5209
5210 rc = -EFAULT;
5211 if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result,
5212 rssd_result, usrparm.rssd_result_len))
5213 goto out_sfree;
5214 rc = 0;
5215
5216out_sfree:
5217 dasd_sfree_request(cqr, cqr->memdev);
5218out_free:
5219 kfree(rssd_result);
5220 kfree(psf_data);
5221out:
52898025
NH		 5222 DBF_DEV_EVENT(DBF_WARNING, device,
5223 "Symmetrix ioctl (0x%02x 0x%02x): rc=%d",
5224 (int) psf0, (int) psf1, rc);
ab1d848f
NH		 5225 return rc;
5226}
5227
1107ccfb 5228static int
8e09f215 5229dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp)
1107ccfb 5230{
8e09f215
SW		 5231 struct dasd_device *device = block->base;
5232
1107ccfb
CH		 5233 switch (cmd) {
5234 case BIODASDGATTR:
5235 return dasd_eckd_get_attrib(device, argp);
5236 case BIODASDSATTR:
5237 return dasd_eckd_set_attrib(device, argp);
5238 case BIODASDPSRD:
5239 return dasd_eckd_performance(device, argp);
5240 case BIODASDRLSE:
5241 return dasd_eckd_release(device);
5242 case BIODASDRSRV:
5243 return dasd_eckd_reserve(device);
5244 case BIODASDSLCK:
5245 return dasd_eckd_steal_lock(device);
196339f1
SW		 5246 case BIODASDSNID:
5247 return dasd_eckd_snid(device, argp);
ab1d848f
NH		 5248 case BIODASDSYMMIO:
5249 return dasd_symm_io(device, argp);
1107ccfb 5250 default:
6b79d14e 5251 return -ENOTTY;
1107ccfb
CH		 5252 }
5253}
5254
445b5b49
HH		 5255/*
5256 * Dump the range of CCWs into 'page' buffer
5257 * and return number of printed chars.
5258 */
4d284cac 5259static int
445b5b49
HH		 5260dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page)
5261{
5262 int len, count;
5263 char *datap;
5264
5265 len = 0;
5266 while (from <= to) {
773bab4a 5267 len += sprintf(page + len, PRINTK_HEADER
445b5b49
HH		 5268 " CCW %p: %08X %08X DAT:",
5269 from, ((int *) from)[0], ((int *) from)[1]);
5270
5271 /* get pointer to data (consider IDALs) */
5272 if (from->flags & CCW_FLAG_IDA)
5273 datap = (char *) *((addr_t *) (addr_t) from->cda);
5274 else
5275 datap = (char *) ((addr_t) from->cda);
5276
5277 /* dump data (max 32 bytes) */
5278 for (count = 0; count < from->count && count < 32; count++) {
5279 if (count % 8 == 0) len += sprintf(page + len, " ");
5280 if (count % 4 == 0) len += sprintf(page + len, " ");
5281 len += sprintf(page + len, "%02x", datap[count]);
5282 }
5283 len += sprintf(page + len, "\n");
5284 from++;
5285 }
5286 return len;
5287}
5288
fc19f381 5289static void
aeec92ca
SH		 5290dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb,
5291 char *reason)
fc19f381
SH		 5292{
5293 u64 *sense;
a5a0061f 5294 u64 *stat;
aeec92ca
SH		 5295
5296 sense = (u64 *) dasd_get_sense(irb);
a5a0061f 5297 stat = (u64 *) &irb->scsw;
fc19f381 5298 if (sense) {
a5a0061f
SW		 5299 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : "
5300 "%016llx %016llx %016llx %016llx",
5301 reason, *stat, *((u32 *) (stat + 1)),
ed3640b2 5302 sense[0], sense[1], sense[2], sense[3]);
fc19f381 5303 } else {
a5a0061f
SW		 5304 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s",
5305 reason, *stat, *((u32 *) (stat + 1)),
5306 "NO VALID SENSE");
fc19f381
SH		 5307 }
5308}
5309
1da177e4
LT		 5310/*
5311 * Print sense data and related channel program.
5312 * Parts are printed because printk buffer is only 1024 bytes.
5313 */
f3eb5384 5314static void dasd_eckd_dump_sense_ccw(struct dasd_device *device,
8e09f215 5315 struct dasd_ccw_req *req, struct irb *irb)
1da177e4
LT		 5316{
5317 char *page;
445b5b49
HH		 5318 struct ccw1 *first, *last, *fail, *from, *to;
5319 int len, sl, sct;
1da177e4
LT		 5320
5321 page = (char *) get_zeroed_page(GFP_ATOMIC);
5322 if (page == NULL) {
fc19f381
SH		 5323 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
5324 "No memory to dump sense data\n");
1da177e4
LT		 5325 return;
5326 }
445b5b49 5327 /* dump the sense data */
773bab4a 5328 len = sprintf(page, PRINTK_HEADER
1da177e4 5329 " I/O status report for device %s:\n",
2a0217d5 5330 dev_name(&device->cdev->dev));
773bab4a 5331 len += sprintf(page + len, PRINTK_HEADER
a5a0061f
SW		 5332 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X "
5333 "CS:%02X RC:%d\n",
5334 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw),
5335 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw),
5336 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw),
5337 req ? req->intrc : 0);
773bab4a 5338 len += sprintf(page + len, PRINTK_HEADER
1da177e4 5339 " device %s: Failing CCW: %p\n",
2a0217d5 5340 dev_name(&device->cdev->dev),
23d805b6 5341 (void *) (addr_t) irb->scsw.cmd.cpa);
1da177e4
LT		 5342 if (irb->esw.esw0.erw.cons) {
5343 for (sl = 0; sl < 4; sl++) {
773bab4a 5344 len += sprintf(page + len, PRINTK_HEADER
1da177e4
LT		 5345 " Sense(hex) %2d-%2d:",
5346 (8 * sl), ((8 * sl) + 7));
5347
5348 for (sct = 0; sct < 8; sct++) {
5349 len += sprintf(page + len, " %02x",
5350 irb->ecw[8 * sl + sct]);
5351 }
5352 len += sprintf(page + len, "\n");
5353 }
5354
5355 if (irb->ecw[27] & DASD_SENSE_BIT_0) {
5356 /* 24 Byte Sense Data */
773bab4a 5357 sprintf(page + len, PRINTK_HEADER
445b5b49
HH		 5358 " 24 Byte: %x MSG %x, "
5359 "%s MSGb to SYSOP\n",
5360 irb->ecw[7] >> 4, irb->ecw[7] & 0x0f,
5361 irb->ecw[1] & 0x10 ? "" : "no");
1da177e4
LT		 5362 } else {
5363 /* 32 Byte Sense Data */
773bab4a 5364 sprintf(page + len, PRINTK_HEADER
445b5b49
HH		 5365 " 32 Byte: Format: %x "
5366 "Exception class %x\n",
5367 irb->ecw[6] & 0x0f, irb->ecw[22] >> 4);
1da177e4
LT		 5368 }
5369 } else {
773bab4a 5370 sprintf(page + len, PRINTK_HEADER
445b5b49 5371 " SORRY - NO VALID SENSE AVAILABLE\n");
1da177e4 5372 }
773bab4a 5373 printk(KERN_ERR "%s", page);
445b5b49 5374
8e09f215
SW		 5375 if (req) {
5376 /* req == NULL for unsolicited interrupts */
5377 /* dump the Channel Program (max 140 Bytes per line) */
5378 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */
5379 first = req->cpaddr;
5380 for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++);
5381 to = min(first + 6, last);
773bab4a 5382 len = sprintf(page, PRINTK_HEADER
8e09f215
SW		 5383 " Related CP in req: %p\n", req);
5384 dasd_eckd_dump_ccw_range(first, to, page + len);
773bab4a 5385 printk(KERN_ERR "%s", page);
1da177e4 5386
8e09f215
SW		 5387 /* print failing CCW area (maximum 4) */
5388 /* scsw->cda is either valid or zero */
5389 len = 0;
5390 from = ++to;
23d805b6
PO		 5391 fail = (struct ccw1 *)(addr_t)
5392 irb->scsw.cmd.cpa; /* failing CCW */
8e09f215
SW		 5393 if (from < fail - 2) {
5394 from = fail - 2; /* there is a gap - print header */
773bab4a 5395 len += sprintf(page, PRINTK_HEADER "......\n");
8e09f215
SW		 5396 }
5397 to = min(fail + 1, last);
5398 len += dasd_eckd_dump_ccw_range(from, to, page + len);
5399
5400 /* print last CCWs (maximum 2) */
5401 from = max(from, ++to);
5402 if (from < last - 1) {
5403 from = last - 1; /* there is a gap - print header */
773bab4a 5404 len += sprintf(page + len, PRINTK_HEADER "......\n");
8e09f215
SW		 5405 }
5406 len += dasd_eckd_dump_ccw_range(from, last, page + len);
5407 if (len > 0)
773bab4a 5408 printk(KERN_ERR "%s", page);
1da177e4 5409 }
1da177e4
LT		 5410 free_page((unsigned long) page);
5411}
5412
f3eb5384
SW		 5413
5414/*
5415 * Print sense data from a tcw.
5416 */
5417static void dasd_eckd_dump_sense_tcw(struct dasd_device *device,
5418 struct dasd_ccw_req *req, struct irb *irb)
5419{
5420 char *page;
5421 int len, sl, sct, residual;
f3eb5384 5422 struct tsb *tsb;
ef19298b 5423 u8 *sense, *rcq;
f3eb5384
SW		 5424
5425 page = (char *) get_zeroed_page(GFP_ATOMIC);
5426 if (page == NULL) {
fc19f381 5427 DBF_DEV_EVENT(DBF_WARNING, device, " %s",
f3eb5384
SW		 5428 "No memory to dump sense data");
5429 return;
5430 }
5431 /* dump the sense data */
773bab4a 5432 len = sprintf(page, PRINTK_HEADER
f3eb5384
SW		 5433 " I/O status report for device %s:\n",
5434 dev_name(&device->cdev->dev));
773bab4a 5435 len += sprintf(page + len, PRINTK_HEADER
a5a0061f
SW		 5436 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X "
5437 "CS:%02X fcxs:%02X schxs:%02X RC:%d\n",
5438 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw),
5439 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw),
5440 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw),
a521b048
SH		 5441 irb->scsw.tm.fcxs,
5442 (irb->scsw.tm.ifob << 7) | irb->scsw.tm.sesq,
a5a0061f 5443 req ? req->intrc : 0);
773bab4a 5444 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 5445 " device %s: Failing TCW: %p\n",
5446 dev_name(&device->cdev->dev),
5447 (void *) (addr_t) irb->scsw.tm.tcw);
5448
5449 tsb = NULL;
5450 sense = NULL;
a5a0061f 5451 if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01))
f3eb5384
SW		 5452 tsb = tcw_get_tsb(
5453 (struct tcw *)(unsigned long)irb->scsw.tm.tcw);
5454
b8fde722 5455 if (tsb) {
773bab4a 5456 len += sprintf(page + len, PRINTK_HEADER
f3eb5384 5457 " tsb->length %d\n", tsb->length);
773bab4a 5458 len += sprintf(page + len, PRINTK_HEADER
f3eb5384 5459 " tsb->flags %x\n", tsb->flags);
773bab4a 5460 len += sprintf(page + len, PRINTK_HEADER
f3eb5384 5461 " tsb->dcw_offset %d\n", tsb->dcw_offset);
773bab4a 5462 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 5463 " tsb->count %d\n", tsb->count);
5464 residual = tsb->count - 28;
773bab4a 5465 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 5466 " residual %d\n", residual);
5467
5468 switch (tsb->flags & 0x07) {
5469 case 1: /* tsa_iostat */
773bab4a 5470 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 5471 " tsb->tsa.iostat.dev_time %d\n",
5472 tsb->tsa.iostat.dev_time);
773bab4a 5473 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 5474 " tsb->tsa.iostat.def_time %d\n",
5475 tsb->tsa.iostat.def_time);
773bab4a 5476 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 5477 " tsb->tsa.iostat.queue_time %d\n",
5478 tsb->tsa.iostat.queue_time);
773bab4a 5479 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 5480 " tsb->tsa.iostat.dev_busy_time %d\n",
5481 tsb->tsa.iostat.dev_busy_time);
773bab4a 5482 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 5483 " tsb->tsa.iostat.dev_act_time %d\n",
5484 tsb->tsa.iostat.dev_act_time);
5485 sense = tsb->tsa.iostat.sense;
5486 break;
5487 case 2: /* ts_ddpc */
773bab4a 5488 len += sprintf(page + len, PRINTK_HEADER
f3eb5384 5489 " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc);
ef19298b 5490 for (sl = 0; sl < 2; sl++) {
773bab4a 5491 len += sprintf(page + len, PRINTK_HEADER
ef19298b
SW		 5492 " tsb->tsa.ddpc.rcq %2d-%2d: ",
5493 (8 * sl), ((8 * sl) + 7));
5494 rcq = tsb->tsa.ddpc.rcq;
f3eb5384
SW		 5495 for (sct = 0; sct < 8; sct++) {
5496 len += sprintf(page + len, " %02x",
ef19298b 5497 rcq[8 * sl + sct]);
f3eb5384
SW		 5498 }
5499 len += sprintf(page + len, "\n");
5500 }
5501 sense = tsb->tsa.ddpc.sense;
5502 break;
5503 case 3: /* tsa_intrg */
773bab4a 5504 len += sprintf(page + len, PRINTK_HEADER
8693b914 5505 " tsb->tsa.intrg.: not supported yet\n");
f3eb5384
SW		 5506 break;
5507 }
5508
5509 if (sense) {
5510 for (sl = 0; sl < 4; sl++) {
773bab4a 5511 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 5512 " Sense(hex) %2d-%2d:",
5513 (8 * sl), ((8 * sl) + 7));
5514 for (sct = 0; sct < 8; sct++) {
5515 len += sprintf(page + len, " %02x",
5516 sense[8 * sl + sct]);
5517 }
5518 len += sprintf(page + len, "\n");
5519 }
5520
5521 if (sense[27] & DASD_SENSE_BIT_0) {
5522 /* 24 Byte Sense Data */
773bab4a 5523 sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 5524 " 24 Byte: %x MSG %x, "
5525 "%s MSGb to SYSOP\n",
5526 sense[7] >> 4, sense[7] & 0x0f,
5527 sense[1] & 0x10 ? "" : "no");
5528 } else {
5529 /* 32 Byte Sense Data */
773bab4a 5530 sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 5531 " 32 Byte: Format: %x "
5532 "Exception class %x\n",
5533 sense[6] & 0x0f, sense[22] >> 4);
5534 }
5535 } else {
773bab4a 5536 sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 5537 " SORRY - NO VALID SENSE AVAILABLE\n");
5538 }
5539 } else {
773bab4a 5540 sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 5541 " SORRY - NO TSB DATA AVAILABLE\n");
5542 }
773bab4a 5543 printk(KERN_ERR "%s", page);
f3eb5384
SW		 5544 free_page((unsigned long) page);
5545}
5546
5547static void dasd_eckd_dump_sense(struct dasd_device *device,
5548 struct dasd_ccw_req *req, struct irb *irb)
5549{
8fd57520
JH		 5550 u8 *sense = dasd_get_sense(irb);
5551
5552 if (scsw_is_tm(&irb->scsw)) {
5553 /*
5554 * In some cases the 'File Protected' or 'Incorrect Length'
5555 * error might be expected and log messages shouldn't be written
5556 * then. Check if the according suppress bit is set.
5557 */
5558 if (sense && (sense[1] & SNS1_FILE_PROTECTED) &&
5559 test_bit(DASD_CQR_SUPPRESS_FP, &req->flags))
5560 return;
5561 if (scsw_cstat(&irb->scsw) == 0x40 &&
5562 test_bit(DASD_CQR_SUPPRESS_IL, &req->flags))
5563 return;
5564
f3eb5384 5565 dasd_eckd_dump_sense_tcw(device, req, irb);
8fd57520
JH		 5566 } else {
5567 /*
ab24fbd3
SH		 5568 * In some cases the 'Command Reject' or 'No Record Found'
5569 * error might be expected and log messages shouldn't be
5570 * written then. Check if the according suppress bit is set.
8fd57520 5571 */
ab24fbd3
SH		 5572 if (sense && sense[0] & SNS0_CMD_REJECT &&
5573 test_bit(DASD_CQR_SUPPRESS_CR, &req->flags))
5574 return;
5575
8fd57520
JH		 5576 if (sense && sense[1] & SNS1_NO_REC_FOUND &&
5577 test_bit(DASD_CQR_SUPPRESS_NRF, &req->flags))
5578 return;
5579
f3eb5384 5580 dasd_eckd_dump_sense_ccw(device, req, irb);
8fd57520 5581 }
f3eb5384
SW		 5582}
5583
501183f2 5584static int dasd_eckd_pm_freeze(struct dasd_device *device)
d41dd122
SH		 5585{
5586 /*
5587 * the device should be disconnected from our LCU structure
5588 * on restore we will reconnect it and reread LCU specific
5589 * information like PAV support that might have changed
5590 */
5591 dasd_alias_remove_device(device);
5592 dasd_alias_disconnect_device_from_lcu(device);
5593
5594 return 0;
5595}
5596
501183f2 5597static int dasd_eckd_restore_device(struct dasd_device *device)
d41dd122 5598{
543691a4 5599 struct dasd_eckd_private *private = device->private;
6fca97a9 5600 struct dasd_eckd_characteristics temp_rdc_data;
f9f8d02f 5601 int rc;
d41dd122 5602 struct dasd_uid temp_uid;
a7602f6c 5603 unsigned long flags;
ea4da6ea 5604 unsigned long cqr_flags = 0;
d41dd122 5605
d41dd122 5606 /* Read Configuration Data */
251afd69
SH		 5607 rc = dasd_eckd_read_conf(device);
5608 if (rc) {
5609 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
5610 "Read configuration data failed, rc=%d", rc);
5611 goto out_err;
5612 }
d41dd122 5613
2dedf0d9
SH		 5614 dasd_eckd_get_uid(device, &temp_uid);
5615 /* Generate device unique id */
5616 rc = dasd_eckd_generate_uid(device);
5617 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
d41dd122 5618 if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0)
a7602f6c
SH		 5619 dev_err(&device->cdev->dev, "The UID of the DASD has "
5620 "changed\n");
2dedf0d9 5621 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
d41dd122
SH		 5622 if (rc)
5623 goto out_err;
d41dd122
SH		 5624
5625 /* register lcu with alias handling, enable PAV if this is a new lcu */
f9f8d02f
SH		 5626 rc = dasd_alias_make_device_known_to_lcu(device);
5627 if (rc)
251afd69 5628 goto out_err;
ea4da6ea
SH		 5629
5630 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags);
5631 dasd_eckd_validate_server(device, cqr_flags);
f4ac1d02
SW		 5632
5633 /* RE-Read Configuration Data */
251afd69
SH		 5634 rc = dasd_eckd_read_conf(device);
5635 if (rc) {
5636 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
5637 "Read configuration data failed, rc=%d", rc);
5638 goto out_err2;
5639 }
d41dd122
SH		 5640
5641 /* Read Feature Codes */
68d1e5f0 5642 dasd_eckd_read_features(device);
d41dd122 5643
c729696b 5644 /* Read Volume Information */
dd454839 5645 dasd_eckd_read_vol_info(device);
c729696b
JH		 5646
5647 /* Read Extent Pool Information */
dd454839 5648 dasd_eckd_read_ext_pool_info(device);
c729696b 5649
d41dd122 5650 /* Read Device Characteristics */
68b781fe 5651 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
6fca97a9 5652 &temp_rdc_data, 64);
d41dd122 5653 if (rc) {
b8ed5dd5
SH		 5654 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
5655 "Read device characteristic failed, rc=%d", rc);
251afd69 5656 goto out_err2;
d41dd122 5657 }
a7602f6c 5658 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
6fca97a9 5659 memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data));
a7602f6c 5660 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
d41dd122
SH		 5661
5662 /* add device to alias management */
5663 dasd_alias_add_device(device);
5664
5665 return 0;
5666
251afd69
SH		 5667out_err2:
5668 dasd_alias_disconnect_device_from_lcu(device);
d41dd122 5669out_err:
e6125fba 5670 return -1;
d41dd122
SH		 5671}
5672
501183f2
SH		 5673static int dasd_eckd_reload_device(struct dasd_device *device)
5674{
543691a4 5675 struct dasd_eckd_private *private = device->private;
501183f2 5676 int rc, old_base;
2dedf0d9
SH		 5677 char print_uid[60];
5678 struct dasd_uid uid;
5679 unsigned long flags;
501183f2 5680
59a9ed5f
SH		 5681 /*
5682 * remove device from alias handling to prevent new requests
5683 * from being scheduled on the wrong alias device
5684 */
5685 dasd_alias_remove_device(device);
5686
2dedf0d9 5687 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
501183f2 5688 old_base = private->uid.base_unit_addr;
2dedf0d9
SH		 5689 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
5690
501183f2
SH		 5691 /* Read Configuration Data */
5692 rc = dasd_eckd_read_conf(device);
5693 if (rc)
5694 goto out_err;
5695
2dedf0d9 5696 rc = dasd_eckd_generate_uid(device);
501183f2
SH		 5697 if (rc)
5698 goto out_err;
501183f2
SH		 5699 /*
5700 * update unit address configuration and
5701 * add device to alias management
5702 */
5703 dasd_alias_update_add_device(device);
5704
2dedf0d9
SH		 5705 dasd_eckd_get_uid(device, &uid);
5706
5707 if (old_base != uid.base_unit_addr) {
5708 if (strlen(uid.vduit) > 0)
5709 snprintf(print_uid, sizeof(print_uid),
5710 "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial,
5711 uid.ssid, uid.base_unit_addr, uid.vduit);
501183f2 5712 else
2dedf0d9
SH		 5713 snprintf(print_uid, sizeof(print_uid),
5714 "%s.%s.%04x.%02x", uid.vendor, uid.serial,
5715 uid.ssid, uid.base_unit_addr);
501183f2
SH		 5716
5717 dev_info(&device->cdev->dev,
5718 "An Alias device was reassigned to a new base device "
2dedf0d9 5719 "with UID: %s\n", print_uid);
501183f2
SH		 5720 }
5721 return 0;
5722
5723out_err:
5724 return -1;
5725}
5726
5db8440c
SH		 5727static int dasd_eckd_read_message_buffer(struct dasd_device *device,
5728 struct dasd_rssd_messages *messages,
5729 __u8 lpum)
5730{
5731 struct dasd_rssd_messages *message_buf;
5732 struct dasd_psf_prssd_data *prssdp;
5db8440c
SH		 5733 struct dasd_ccw_req *cqr;
5734 struct ccw1 *ccw;
5735 int rc;
5736
5db8440c
SH		 5737 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
5738 (sizeof(struct dasd_psf_prssd_data) +
5739 sizeof(struct dasd_rssd_messages)),
c5205f2f 5740 device, NULL);
5db8440c
SH		 5741 if (IS_ERR(cqr)) {
5742 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
5743 "Could not allocate read message buffer request");
5744 return PTR_ERR(cqr);
5745 }
5746
af775210
SH		 5747 cqr->lpm = lpum;
5748retry:
5db8440c
SH		 5749 cqr->startdev = device;
5750 cqr->memdev = device;
5751 cqr->block = NULL;
5db8440c 5752 cqr->expires = 10 * HZ;
5db8440c 5753 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags);
b179b037
SH		 5754 /* dasd_sleep_on_immediatly does not do complex error
5755 * recovery so clear erp flag and set retry counter to
5756 * do basic erp */
5757 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
5758 cqr->retries = 256;
5db8440c
SH		 5759
5760 /* Prepare for Read Subsystem Data */
5761 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
5762 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
5763 prssdp->order = PSF_ORDER_PRSSD;
5764 prssdp->suborder = 0x03; /* Message Buffer */
5765 /* all other bytes of prssdp must be zero */
5766
5767 ccw = cqr->cpaddr;
5768 ccw->cmd_code = DASD_ECKD_CCW_PSF;
5769 ccw->count = sizeof(struct dasd_psf_prssd_data);
5770 ccw->flags |= CCW_FLAG_CC;
5771 ccw->flags |= CCW_FLAG_SLI;
5772 ccw->cda = (__u32)(addr_t) prssdp;
5773
5774 /* Read Subsystem Data - message buffer */
5775 message_buf = (struct dasd_rssd_messages *) (prssdp + 1);
5776 memset(message_buf, 0, sizeof(struct dasd_rssd_messages));
5777
5778 ccw++;
5779 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
5780 ccw->count = sizeof(struct dasd_rssd_messages);
5781 ccw->flags |= CCW_FLAG_SLI;
5782 ccw->cda = (__u32)(addr_t) message_buf;
5783
5784 cqr->buildclk = get_tod_clock();
5785 cqr->status = DASD_CQR_FILLED;
5786 rc = dasd_sleep_on_immediatly(cqr);
5787 if (rc == 0) {
5788 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
5789 message_buf = (struct dasd_rssd_messages *)
5790 (prssdp + 1);
5791 memcpy(messages, message_buf,
5792 sizeof(struct dasd_rssd_messages));
af775210
SH		 5793 } else if (cqr->lpm) {
5794 /*
5795 * on z/VM we might not be able to do I/O on the requested path
5796 * but instead we get the required information on any path
5797 * so retry with open path mask
5798 */
5799 cqr->lpm = 0;
5800 goto retry;
5db8440c
SH		 5801 } else
5802 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
5803 "Reading messages failed with rc=%d\n"
5804 , rc);
5805 dasd_sfree_request(cqr, cqr->memdev);
5806 return rc;
5807}
5808
5a3b7b11
SH		 5809static int dasd_eckd_query_host_access(struct dasd_device *device,
5810 struct dasd_psf_query_host_access *data)
5811{
5812 struct dasd_eckd_private *private = device->private;
5813 struct dasd_psf_query_host_access *host_access;
5814 struct dasd_psf_prssd_data *prssdp;
5815 struct dasd_ccw_req *cqr;
5816 struct ccw1 *ccw;
5817 int rc;
5818
5819 /* not available for HYPER PAV alias devices */
5820 if (!device->block && private->lcu->pav == HYPER_PAV)
5821 return -EOPNOTSUPP;
5822
ccd53fa2
SH		 5823 /* may not be supported by the storage server */
5824 if (!(private->features.feature[14] & 0x80))
5825 return -EOPNOTSUPP;
5826
5a3b7b11
SH		 5827 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
5828 sizeof(struct dasd_psf_prssd_data) + 1,
c5205f2f 5829 device, NULL);
5a3b7b11
SH		 5830 if (IS_ERR(cqr)) {
5831 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
5832 "Could not allocate read message buffer request");
5833 return PTR_ERR(cqr);
5834 }
5835 host_access = kzalloc(sizeof(*host_access), GFP_KERNEL | GFP_DMA);
5836 if (!host_access) {
5837 dasd_sfree_request(cqr, device);
5838 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
5839 "Could not allocate host_access buffer");
5840 return -ENOMEM;
5841 }
5842 cqr->startdev = device;
5843 cqr->memdev = device;
5844 cqr->block = NULL;
5845 cqr->retries = 256;
5846 cqr->expires = 10 * HZ;
5847
5848 /* Prepare for Read Subsystem Data */
5849 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
5850 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
5851 prssdp->order = PSF_ORDER_PRSSD;
5852 prssdp->suborder = PSF_SUBORDER_QHA; /* query host access */
5853 /* LSS and Volume that will be queried */
5854 prssdp->lss = private->ned->ID;
5855 prssdp->volume = private->ned->unit_addr;
5856 /* all other bytes of prssdp must be zero */
5857
5858 ccw = cqr->cpaddr;
5859 ccw->cmd_code = DASD_ECKD_CCW_PSF;
5860 ccw->count = sizeof(struct dasd_psf_prssd_data);
5861 ccw->flags |= CCW_FLAG_CC;
5862 ccw->flags |= CCW_FLAG_SLI;
5863 ccw->cda = (__u32)(addr_t) prssdp;
5864
5865 /* Read Subsystem Data - query host access */
5866 ccw++;
5867 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
5868 ccw->count = sizeof(struct dasd_psf_query_host_access);
5869 ccw->flags |= CCW_FLAG_SLI;
5870 ccw->cda = (__u32)(addr_t) host_access;
5871
5872 cqr->buildclk = get_tod_clock();
5873 cqr->status = DASD_CQR_FILLED;
ab24fbd3
SH		 5874 /* the command might not be supported, suppress error message */
5875 __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags);
f50af850 5876 rc = dasd_sleep_on_interruptible(cqr);
5a3b7b11
SH		 5877 if (rc == 0) {
5878 *data = *host_access;
5879 } else {
5880 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
5881 "Reading host access data failed with rc=%d\n",
5882 rc);
5883 rc = -EOPNOTSUPP;
5884 }
5885
5886 dasd_sfree_request(cqr, cqr->memdev);
5887 kfree(host_access);
5888 return rc;
5889}
5890/*
5891 * return number of grouped devices
5892 */
5893static int dasd_eckd_host_access_count(struct dasd_device *device)
5894{
5895 struct dasd_psf_query_host_access *access;
5896 struct dasd_ckd_path_group_entry *entry;
5897 struct dasd_ckd_host_information *info;
5898 int count = 0;
5899 int rc, i;
5900
5901 access = kzalloc(sizeof(*access), GFP_NOIO);
5902 if (!access) {
5903 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
5904 "Could not allocate access buffer");
5905 return -ENOMEM;
5906 }
5907 rc = dasd_eckd_query_host_access(device, access);
5908 if (rc) {
5909 kfree(access);
5910 return rc;
5911 }
5912
5913 info = (struct dasd_ckd_host_information *)
5914 access->host_access_information;
5915 for (i = 0; i < info->entry_count; i++) {
5916 entry = (struct dasd_ckd_path_group_entry *)
5917 (info->entry + i * info->entry_size);
5918 if (entry->status_flags & DASD_ECKD_PG_GROUPED)
5919 count++;
5920 }
5921
5922 kfree(access);
5923 return count;
5924}
5925
5926/*
5927 * write host access information to a sequential file
5928 */
5929static int dasd_hosts_print(struct dasd_device *device, struct seq_file *m)
5930{
5931 struct dasd_psf_query_host_access *access;
5932 struct dasd_ckd_path_group_entry *entry;
5933 struct dasd_ckd_host_information *info;
5934 char sysplex[9] = "";
c7848e14 5935 int rc, i;
5a3b7b11
SH		 5936
5937 access = kzalloc(sizeof(*access), GFP_NOIO);
5938 if (!access) {
5939 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
5940 "Could not allocate access buffer");
5941 return -ENOMEM;
5942 }
5943 rc = dasd_eckd_query_host_access(device, access);
5944 if (rc) {
5945 kfree(access);
5946 return rc;
5947 }
5948
5949 info = (struct dasd_ckd_host_information *)
5950 access->host_access_information;
5951 for (i = 0; i < info->entry_count; i++) {
5952 entry = (struct dasd_ckd_path_group_entry *)
5953 (info->entry + i * info->entry_size);
5954 /* PGID */
c7848e14 5955 seq_printf(m, "pgid %*phN\n", 11, entry->pgid);
5a3b7b11
SH		 5956 /* FLAGS */
5957 seq_printf(m, "status_flags %02x\n", entry->status_flags);
5958 /* SYSPLEX NAME */
5959 memcpy(&sysplex, &entry->sysplex_name, sizeof(sysplex) - 1);
5960 EBCASC(sysplex, sizeof(sysplex));
5961 seq_printf(m, "sysplex_name %8s\n", sysplex);
5962 /* SUPPORTED CYLINDER */
5963 seq_printf(m, "supported_cylinder %d\n", entry->cylinder);
5964 /* TIMESTAMP */
5965 seq_printf(m, "timestamp %lu\n", (unsigned long)
5966 entry->timestamp);
5967 }
5968 kfree(access);
5969
5970 return 0;
5971}
5972
5db8440c
SH		 5973/*
5974 * Perform Subsystem Function - CUIR response
5975 */
5976static int
5977dasd_eckd_psf_cuir_response(struct dasd_device *device, int response,
a521b048 5978 __u32 message_id, __u8 lpum)
5db8440c
SH		 5979{
5980 struct dasd_psf_cuir_response *psf_cuir;
a521b048 5981 int pos = pathmask_to_pos(lpum);
5db8440c
SH		 5982 struct dasd_ccw_req *cqr;
5983 struct ccw1 *ccw;
5984 int rc;
5985
5986 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ ,
c5205f2f
SO		 5987 sizeof(struct dasd_psf_cuir_response),
5988 device, NULL);
5db8440c
SH		 5989
5990 if (IS_ERR(cqr)) {
5991 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
5992 "Could not allocate PSF-CUIR request");
5993 return PTR_ERR(cqr);
5994 }
5995
5996 psf_cuir = (struct dasd_psf_cuir_response *)cqr->data;
5997 psf_cuir->order = PSF_ORDER_CUIR_RESPONSE;
5998 psf_cuir->cc = response;
a521b048 5999 psf_cuir->chpid = device->path[pos].chpid;
5db8440c 6000 psf_cuir->message_id = message_id;
a521b048
SH		 6001 psf_cuir->cssid = device->path[pos].cssid;
6002 psf_cuir->ssid = device->path[pos].ssid;
5db8440c
SH		 6003 ccw = cqr->cpaddr;
6004 ccw->cmd_code = DASD_ECKD_CCW_PSF;
6005 ccw->cda = (__u32)(addr_t)psf_cuir;
b179b037 6006 ccw->flags = CCW_FLAG_SLI;
5db8440c
SH		 6007 ccw->count = sizeof(struct dasd_psf_cuir_response);
6008
6009 cqr->startdev = device;
6010 cqr->memdev = device;
6011 cqr->block = NULL;
6012 cqr->retries = 256;
6013 cqr->expires = 10*HZ;
6014 cqr->buildclk = get_tod_clock();
6015 cqr->status = DASD_CQR_FILLED;
b179b037 6016 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags);
5db8440c
SH		 6017
6018 rc = dasd_sleep_on(cqr);
6019
6020 dasd_sfree_request(cqr, cqr->memdev);
6021 return rc;
6022}
6023
b179b037
SH		 6024/*
6025 * return configuration data that is referenced by record selector
6026 * if a record selector is specified or per default return the
6027 * conf_data pointer for the path specified by lpum
6028 */
6029static struct dasd_conf_data *dasd_eckd_get_ref_conf(struct dasd_device *device,
6030 __u8 lpum,
6031 struct dasd_cuir_message *cuir)
5db8440c 6032{
b179b037
SH		 6033 struct dasd_conf_data *conf_data;
6034 int path, pos;
5db8440c 6035
b179b037
SH		 6036 if (cuir->record_selector == 0)
6037 goto out;
6038 for (path = 0x80, pos = 0; path; path >>= 1, pos++) {
c9346151 6039 conf_data = device->path[pos].conf_data;
b179b037
SH		 6040 if (conf_data->gneq.record_selector ==
6041 cuir->record_selector)
6042 return conf_data;
5db8440c 6043 }
b179b037 6044out:
c9346151 6045 return device->path[pathmask_to_pos(lpum)].conf_data;
5db8440c
SH		 6046}
6047
6048/*
b179b037
SH		 6049 * This function determines the scope of a reconfiguration request by
6050 * analysing the path and device selection data provided in the CUIR request.
6051 * Returns a path mask containing CUIR affected paths for the give device.
6052 *
6053 * If the CUIR request does not contain the required information return the
6054 * path mask of the path the attention message for the CUIR request was reveived
6055 * on.
6056 */
6057static int dasd_eckd_cuir_scope(struct dasd_device *device, __u8 lpum,
6058 struct dasd_cuir_message *cuir)
6059{
6060 struct dasd_conf_data *ref_conf_data;
6061 unsigned long bitmask = 0, mask = 0;
b179b037
SH		 6062 struct dasd_conf_data *conf_data;
6063 unsigned int pos, path;
6064 char *ref_gneq, *gneq;
6065 char *ref_ned, *ned;
6066 int tbcpm = 0;
6067
6068 /* if CUIR request does not specify the scope use the path
6069 the attention message was presented on */
6070 if (!cuir->ned_map ||
6071 !(cuir->neq_map[0] | cuir->neq_map[1] | cuir->neq_map[2]))
6072 return lpum;
6073
b179b037
SH		 6074 /* get reference conf data */
6075 ref_conf_data = dasd_eckd_get_ref_conf(device, lpum, cuir);
6076 /* reference ned is determined by ned_map field */
6077 pos = 8 - ffs(cuir->ned_map);
6078 ref_ned = (char *)&ref_conf_data->neds[pos];
6079 ref_gneq = (char *)&ref_conf_data->gneq;
6080 /* transfer 24 bit neq_map to mask */
6081 mask = cuir->neq_map[2];
6082 mask |= cuir->neq_map[1] << 8;
6083 mask |= cuir->neq_map[0] << 16;
6084
c9346151 6085 for (path = 0; path < 8; path++) {
b179b037
SH		 6086 /* initialise data per path */
6087 bitmask = mask;
c9346151 6088 conf_data = device->path[path].conf_data;
b179b037
SH		 6089 pos = 8 - ffs(cuir->ned_map);
6090 ned = (char *) &conf_data->neds[pos];
6091 /* compare reference ned and per path ned */
6092 if (memcmp(ref_ned, ned, sizeof(*ned)) != 0)
6093 continue;
6094 gneq = (char *)&conf_data->gneq;
6095 /* compare reference gneq and per_path gneq under
6096 24 bit mask where mask bit 0 equals byte 7 of
6097 the gneq and mask bit 24 equals byte 31 */
6098 while (bitmask) {
6099 pos = ffs(bitmask) - 1;
6100 if (memcmp(&ref_gneq[31 - pos], &gneq[31 - pos], 1)
6101 != 0)
6102 break;
6103 clear_bit(pos, &bitmask);
6104 }
6105 if (bitmask)
6106 continue;
6107 /* device and path match the reference values
6108 add path to CUIR scope */
c9346151 6109 tbcpm |= 0x80 >> path;
b179b037
SH		 6110 }
6111 return tbcpm;
6112}
6113
6114static void dasd_eckd_cuir_notify_user(struct dasd_device *device,
a521b048 6115 unsigned long paths, int action)
b179b037 6116{
b179b037
SH		 6117 int pos;
6118
6119 while (paths) {
6120 /* get position of bit in mask */
a521b048 6121 pos = 8 - ffs(paths);
b179b037 6122 /* get channel path descriptor from this position */
b179b037 6123 if (action == CUIR_QUIESCE)
a521b048
SH		 6124 pr_warn("Service on the storage server caused path %x.%02x to go offline",
6125 device->path[pos].cssid,
6126 device->path[pos].chpid);
b179b037 6127 else if (action == CUIR_RESUME)
a521b048
SH		 6128 pr_info("Path %x.%02x is back online after service on the storage server",
6129 device->path[pos].cssid,
6130 device->path[pos].chpid);
6131 clear_bit(7 - pos, &paths);
b179b037
SH		 6132 }
6133}
6134
6135static int dasd_eckd_cuir_remove_path(struct dasd_device *device, __u8 lpum,
6136 struct dasd_cuir_message *cuir)
6137{
6138 unsigned long tbcpm;
6139
6140 tbcpm = dasd_eckd_cuir_scope(device, lpum, cuir);
6141 /* nothing to do if path is not in use */
c9346151 6142 if (!(dasd_path_get_opm(device) & tbcpm))
b179b037 6143 return 0;
c9346151 6144 if (!(dasd_path_get_opm(device) & ~tbcpm)) {
b179b037
SH		 6145 /* no path would be left if the CUIR action is taken
6146 return error */
6147 return -EINVAL;
6148 }
6149 /* remove device from operational path mask */
c9346151
SH		 6150 dasd_path_remove_opm(device, tbcpm);
6151 dasd_path_add_cuirpm(device, tbcpm);
b179b037
SH		 6152 return tbcpm;
6153}
6154
6155/*
6156 * walk through all devices and build a path mask to quiesce them
6157 * return an error if the last path to a device would be removed
5db8440c
SH		 6158 *
6159 * if only part of the devices are quiesced and an error
6160 * occurs no onlining necessary, the storage server will
6161 * notify the already set offline devices again
6162 */
6163static int dasd_eckd_cuir_quiesce(struct dasd_device *device, __u8 lpum,
b179b037 6164 struct dasd_cuir_message *cuir)
5db8440c 6165{
543691a4 6166 struct dasd_eckd_private *private = device->private;
5db8440c 6167 struct alias_pav_group *pavgroup, *tempgroup;
5db8440c 6168 struct dasd_device *dev, *n;
b179b037
SH		 6169 unsigned long paths = 0;
6170 unsigned long flags;
6171 int tbcpm;
5db8440c 6172
5db8440c 6173 /* active devices */
b179b037 6174 list_for_each_entry_safe(dev, n, &private->lcu->active_devices,
5db8440c 6175 alias_list) {
b179b037
SH		 6176 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
6177 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
6178 spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags);
6179 if (tbcpm < 0)
6180 goto out_err;
6181 paths |= tbcpm;
5db8440c 6182 }
5db8440c 6183 /* inactive devices */
b179b037 6184 list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices,
5db8440c 6185 alias_list) {
b179b037
SH		 6186 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
6187 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
6188 spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags);
6189 if (tbcpm < 0)
6190 goto out_err;
6191 paths |= tbcpm;
5db8440c 6192 }
5db8440c
SH		 6193 /* devices in PAV groups */
6194 list_for_each_entry_safe(pavgroup, tempgroup,
6195 &private->lcu->grouplist, group) {
6196 list_for_each_entry_safe(dev, n, &pavgroup->baselist,
6197 alias_list) {
b179b037
SH		 6198 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
6199 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
6200 spin_unlock_irqrestore(
6201 get_ccwdev_lock(dev->cdev), flags);
6202 if (tbcpm < 0)
6203 goto out_err;
6204 paths |= tbcpm;
5db8440c
SH		 6205 }
6206 list_for_each_entry_safe(dev, n, &pavgroup->aliaslist,
6207 alias_list) {
b179b037
SH		 6208 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
6209 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
6210 spin_unlock_irqrestore(
6211 get_ccwdev_lock(dev->cdev), flags);
6212 if (tbcpm < 0)
6213 goto out_err;
6214 paths |= tbcpm;
5db8440c
SH		 6215 }
6216 }
b179b037 6217 /* notify user about all paths affected by CUIR action */
a521b048 6218 dasd_eckd_cuir_notify_user(device, paths, CUIR_QUIESCE);
b179b037
SH		 6219 return 0;
6220out_err:
6221 return tbcpm;
5db8440c
SH		 6222}
6223
6224static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum,
b179b037 6225 struct dasd_cuir_message *cuir)
5db8440c 6226{
543691a4 6227 struct dasd_eckd_private *private = device->private;
5db8440c 6228 struct alias_pav_group *pavgroup, *tempgroup;
5db8440c 6229 struct dasd_device *dev, *n;
b179b037
SH		 6230 unsigned long paths = 0;
6231 int tbcpm;
5db8440c 6232
5db8440c
SH		 6233 /*
6234 * the path may have been added through a generic path event before
6235 * only trigger path verification if the path is not already in use
6236 */
5db8440c
SH		 6237 list_for_each_entry_safe(dev, n,
6238 &private->lcu->active_devices,
6239 alias_list) {
b179b037
SH		 6240 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
6241 paths |= tbcpm;
c9346151
SH		 6242 if (!(dasd_path_get_opm(dev) & tbcpm)) {
6243 dasd_path_add_tbvpm(dev, tbcpm);
5db8440c
SH		 6244 dasd_schedule_device_bh(dev);
6245 }
6246 }
5db8440c
SH		 6247 list_for_each_entry_safe(dev, n,
6248 &private->lcu->inactive_devices,
6249 alias_list) {
b179b037
SH		 6250 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
6251 paths |= tbcpm;
c9346151
SH		 6252 if (!(dasd_path_get_opm(dev) & tbcpm)) {
6253 dasd_path_add_tbvpm(dev, tbcpm);
5db8440c
SH		 6254 dasd_schedule_device_bh(dev);
6255 }
6256 }
5db8440c
SH		 6257 /* devices in PAV groups */
6258 list_for_each_entry_safe(pavgroup, tempgroup,
6259 &private->lcu->grouplist,
6260 group) {
6261 list_for_each_entry_safe(dev, n,
6262 &pavgroup->baselist,
6263 alias_list) {
b179b037
SH		 6264 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
6265 paths |= tbcpm;
c9346151
SH		 6266 if (!(dasd_path_get_opm(dev) & tbcpm)) {
6267 dasd_path_add_tbvpm(dev, tbcpm);
5db8440c
SH		 6268 dasd_schedule_device_bh(dev);
6269 }
6270 }
6271 list_for_each_entry_safe(dev, n,
6272 &pavgroup->aliaslist,
6273 alias_list) {
b179b037
SH		 6274 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
6275 paths |= tbcpm;
c9346151
SH		 6276 if (!(dasd_path_get_opm(dev) & tbcpm)) {
6277 dasd_path_add_tbvpm(dev, tbcpm);
5db8440c
SH		 6278 dasd_schedule_device_bh(dev);
6279 }
6280 }
6281 }
b179b037 6282 /* notify user about all paths affected by CUIR action */
a521b048 6283 dasd_eckd_cuir_notify_user(device, paths, CUIR_RESUME);
b179b037 6284 return 0;
5db8440c
SH		 6285}
6286
6287static void dasd_eckd_handle_cuir(struct dasd_device *device, void *messages,
6288 __u8 lpum)
6289{
6290 struct dasd_cuir_message *cuir = messages;
a521b048 6291 int response;
5db8440c 6292
b179b037
SH		 6293 DBF_DEV_EVENT(DBF_WARNING, device,
6294 "CUIR request: %016llx %016llx %016llx %08x",
6295 ((u64 *)cuir)[0], ((u64 *)cuir)[1], ((u64 *)cuir)[2],
6296 ((u32 *)cuir)[3]);
5db8440c
SH		 6297
6298 if (cuir->code == CUIR_QUIESCE) {
6299 /* quiesce */
a521b048 6300 if (dasd_eckd_cuir_quiesce(device, lpum, cuir))
b179b037
SH		 6301 response = PSF_CUIR_LAST_PATH;
6302 else
6303 response = PSF_CUIR_COMPLETED;
5db8440c
SH		 6304 } else if (cuir->code == CUIR_RESUME) {
6305 /* resume */
a521b048 6306 dasd_eckd_cuir_resume(device, lpum, cuir);
b179b037 6307 response = PSF_CUIR_COMPLETED;
5db8440c
SH		 6308 } else
6309 response = PSF_CUIR_NOT_SUPPORTED;
6310
b179b037 6311 dasd_eckd_psf_cuir_response(device, response,
a521b048 6312 cuir->message_id, lpum);
b179b037
SH		 6313 DBF_DEV_EVENT(DBF_WARNING, device,
6314 "CUIR response: %d on message ID %08x", response,
6315 cuir->message_id);
b179b037
SH		 6316 /* to make sure there is no attention left schedule work again */
6317 device->discipline->check_attention(device, lpum);
5db8440c
SH		 6318}
6319
9e12e54c
JH		 6320static void dasd_eckd_oos_resume(struct dasd_device *device)
6321{
6322 struct dasd_eckd_private *private = device->private;
6323 struct alias_pav_group *pavgroup, *tempgroup;
6324 struct dasd_device *dev, *n;
6325 unsigned long flags;
6326
6327 spin_lock_irqsave(&private->lcu->lock, flags);
6328 list_for_each_entry_safe(dev, n, &private->lcu->active_devices,
6329 alias_list) {
6330 if (dev->stopped & DASD_STOPPED_NOSPC)
6331 dasd_generic_space_avail(dev);
6332 }
6333 list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices,
6334 alias_list) {
6335 if (dev->stopped & DASD_STOPPED_NOSPC)
6336 dasd_generic_space_avail(dev);
6337 }
6338 /* devices in PAV groups */
6339 list_for_each_entry_safe(pavgroup, tempgroup,
6340 &private->lcu->grouplist,
6341 group) {
6342 list_for_each_entry_safe(dev, n, &pavgroup->baselist,
6343 alias_list) {
6344 if (dev->stopped & DASD_STOPPED_NOSPC)
6345 dasd_generic_space_avail(dev);
6346 }
6347 list_for_each_entry_safe(dev, n, &pavgroup->aliaslist,
6348 alias_list) {
6349 if (dev->stopped & DASD_STOPPED_NOSPC)
6350 dasd_generic_space_avail(dev);
6351 }
6352 }
6353 spin_unlock_irqrestore(&private->lcu->lock, flags);
6354}
6355
6356static void dasd_eckd_handle_oos(struct dasd_device *device, void *messages,
6357 __u8 lpum)
6358{
6359 struct dasd_oos_message *oos = messages;
6360
6361 switch (oos->code) {
6362 case REPO_WARN:
6363 case POOL_WARN:
6364 dev_warn(&device->cdev->dev,
6365 "Extent pool usage has reached a critical value\n");
6366 dasd_eckd_oos_resume(device);
6367 break;
6368 case REPO_EXHAUST:
6369 case POOL_EXHAUST:
6370 dev_warn(&device->cdev->dev,
6371 "Extent pool is exhausted\n");
6372 break;
6373 case REPO_RELIEVE:
6374 case POOL_RELIEVE:
6375 dev_info(&device->cdev->dev,
6376 "Extent pool physical space constraint has been relieved\n");
6377 break;
6378 }
6379
6380 /* In any case, update related data */
6381 dasd_eckd_read_ext_pool_info(device);
6382
6383 /* to make sure there is no attention left schedule work again */
6384 device->discipline->check_attention(device, lpum);
6385}
6386
5db8440c
SH		 6387static void dasd_eckd_check_attention_work(struct work_struct *work)
6388{
6389 struct check_attention_work_data *data;
6390 struct dasd_rssd_messages *messages;
6391 struct dasd_device *device;
6392 int rc;
6393
6394 data = container_of(work, struct check_attention_work_data, worker);
6395 device = data->device;
5db8440c
SH		 6396 messages = kzalloc(sizeof(*messages), GFP_KERNEL);
6397 if (!messages) {
6398 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
6399 "Could not allocate attention message buffer");
6400 goto out;
6401 }
5db8440c
SH		 6402 rc = dasd_eckd_read_message_buffer(device, messages, data->lpum);
6403 if (rc)
6404 goto out;
9e12e54c 6405
5db8440c
SH		 6406 if (messages->length == ATTENTION_LENGTH_CUIR &&
6407 messages->format == ATTENTION_FORMAT_CUIR)
6408 dasd_eckd_handle_cuir(device, messages, data->lpum);
9e12e54c
JH		 6409 if (messages->length == ATTENTION_LENGTH_OOS &&
6410 messages->format == ATTENTION_FORMAT_OOS)
6411 dasd_eckd_handle_oos(device, messages, data->lpum);
6412
5db8440c
SH		 6413out:
6414 dasd_put_device(device);
6415 kfree(messages);
6416 kfree(data);
6417}
6418
6419static int dasd_eckd_check_attention(struct dasd_device *device, __u8 lpum)
6420{
6421 struct check_attention_work_data *data;
6422
6423 data = kzalloc(sizeof(*data), GFP_ATOMIC);
6424 if (!data)
6425 return -ENOMEM;
6426 INIT_WORK(&data->worker, dasd_eckd_check_attention_work);
6427 dasd_get_device(device);
6428 data->device = device;
6429 data->lpum = lpum;
6430 schedule_work(&data->worker);
6431 return 0;
6432}
6433
a521b048
SH		 6434static int dasd_eckd_disable_hpf_path(struct dasd_device *device, __u8 lpum)
6435{
6436 if (~lpum & dasd_path_get_opm(device)) {
6437 dasd_path_add_nohpfpm(device, lpum);
6438 dasd_path_remove_opm(device, lpum);
6439 dev_err(&device->cdev->dev,
6440 "Channel path %02X lost HPF functionality and is disabled\n",
6441 lpum);
6442 return 1;
6443 }
6444 return 0;
6445}
6446
6447static void dasd_eckd_disable_hpf_device(struct dasd_device *device)
6448{
6449 struct dasd_eckd_private *private = device->private;
6450
6451 dev_err(&device->cdev->dev,
6452 "High Performance FICON disabled\n");
6453 private->fcx_max_data = 0;
6454}
6455
6456static int dasd_eckd_hpf_enabled(struct dasd_device *device)
6457{
6458 struct dasd_eckd_private *private = device->private;
6459
6460 return private->fcx_max_data ? 1 : 0;
6461}
6462
6463static void dasd_eckd_handle_hpf_error(struct dasd_device *device,
6464 struct irb *irb)
6465{
6466 struct dasd_eckd_private *private = device->private;
6467
6468 if (!private->fcx_max_data) {
6469 /* sanity check for no HPF, the error makes no sense */
6470 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
6471 "Trying to disable HPF for a non HPF device");
6472 return;
6473 }
6474 if (irb->scsw.tm.sesq == SCSW_SESQ_DEV_NOFCX) {
6475 dasd_eckd_disable_hpf_device(device);
6476 } else if (irb->scsw.tm.sesq == SCSW_SESQ_PATH_NOFCX) {
6477 if (dasd_eckd_disable_hpf_path(device, irb->esw.esw1.lpum))
6478 return;
6479 dasd_eckd_disable_hpf_device(device);
6480 dasd_path_set_tbvpm(device,
6481 dasd_path_get_hpfpm(device));
6482 }
6483 /*
6484 * prevent that any new I/O ist started on the device and schedule a
6485 * requeue of existing requests
6486 */
6487 dasd_device_set_stop_bits(device, DASD_STOPPED_NOT_ACC);
6488 dasd_schedule_requeue(device);
6489}
6490
a0610a8a
JH		 6491/*
6492 * Initialize block layer request queue.
6493 */
6494static void dasd_eckd_setup_blk_queue(struct dasd_block *block)
6495{
6496 unsigned int logical_block_size = block->bp_block;
6497 struct request_queue *q = block->request_queue;
6498 struct dasd_device *device = block->base;
6499 int max;
6500
6501 if (device->features & DASD_FEATURE_USERAW) {
6502 /*
6503 * the max_blocks value for raw_track access is 256
6504 * it is higher than the native ECKD value because we
6505 * only need one ccw per track
6506 * so the max_hw_sectors are
6507 * 2048 x 512B = 1024kB = 16 tracks
6508 */
6509 max = DASD_ECKD_MAX_BLOCKS_RAW << block->s2b_shift;
6510 } else {
6511 max = DASD_ECKD_MAX_BLOCKS << block->s2b_shift;
6512 }
6513 blk_queue_flag_set(QUEUE_FLAG_NONROT, q);
6514 q->limits.max_dev_sectors = max;
6515 blk_queue_logical_block_size(q, logical_block_size);
6516 blk_queue_max_hw_sectors(q, max);
6517 blk_queue_max_segments(q, USHRT_MAX);
6518 /* With page sized segments each segment can be translated into one idaw/tidaw */
6519 blk_queue_max_segment_size(q, PAGE_SIZE);
6520 blk_queue_segment_boundary(q, PAGE_SIZE - 1);
6521}
6522
d41dd122 6523static struct ccw_driver dasd_eckd_driver = {
3bda058b
SO		 6524 .driver = {
6525 .name = "dasd-eckd",
6526 .owner = THIS_MODULE,
6527 },
d41dd122
SH		 6528 .ids = dasd_eckd_ids,
6529 .probe = dasd_eckd_probe,
6530 .remove = dasd_generic_remove,
6531 .set_offline = dasd_generic_set_offline,
6532 .set_online = dasd_eckd_set_online,
6533 .notify = dasd_generic_notify,
a4d26c6a 6534 .path_event = dasd_generic_path_event,
4679e893 6535 .shutdown = dasd_generic_shutdown,
d41dd122
SH		 6536 .freeze = dasd_generic_pm_freeze,
6537 .thaw = dasd_generic_restore_device,
6538 .restore = dasd_generic_restore_device,
a23ed009 6539 .uc_handler = dasd_generic_uc_handler,
420f42ec 6540 .int_class = IRQIO_DAS,
d41dd122 6541};
f3eb5384 6542
1da177e4
LT		 6543static struct dasd_discipline dasd_eckd_discipline = {
6544 .owner = THIS_MODULE,
6545 .name = "ECKD",
6546 .ebcname = "ECKD",
1da177e4 6547 .check_device = dasd_eckd_check_characteristics,
8e09f215 6548 .uncheck_device = dasd_eckd_uncheck_device,
1da177e4 6549 .do_analysis = dasd_eckd_do_analysis,
a4d26c6a 6550 .verify_path = dasd_eckd_verify_path,
d42e1712 6551 .basic_to_ready = dasd_eckd_basic_to_ready,
8e09f215 6552 .online_to_ready = dasd_eckd_online_to_ready,
daa991bf 6553 .basic_to_known = dasd_eckd_basic_to_known,
a0610a8a 6554 .setup_blk_queue = dasd_eckd_setup_blk_queue,
1da177e4
LT		 6555 .fill_geometry = dasd_eckd_fill_geometry,
6556 .start_IO = dasd_start_IO,
6557 .term_IO = dasd_term_IO,
8e09f215 6558 .handle_terminated_request = dasd_eckd_handle_terminated_request,
1da177e4 6559 .format_device = dasd_eckd_format_device,
8fd57520 6560 .check_device_format = dasd_eckd_check_device_format,
1da177e4
LT		 6561 .erp_action = dasd_eckd_erp_action,
6562 .erp_postaction = dasd_eckd_erp_postaction,
5a27e60d 6563 .check_for_device_change = dasd_eckd_check_for_device_change,
8e09f215
SW		 6564 .build_cp = dasd_eckd_build_alias_cp,
6565 .free_cp = dasd_eckd_free_alias_cp,
1da177e4 6566 .dump_sense = dasd_eckd_dump_sense,
fc19f381 6567 .dump_sense_dbf = dasd_eckd_dump_sense_dbf,
1da177e4 6568 .fill_info = dasd_eckd_fill_info,
1107ccfb 6569 .ioctl = dasd_eckd_ioctl,
d41dd122
SH		 6570 .freeze = dasd_eckd_pm_freeze,
6571 .restore = dasd_eckd_restore_device,
501183f2 6572 .reload = dasd_eckd_reload_device,
2dedf0d9 6573 .get_uid = dasd_eckd_get_uid,
f1633031 6574 .kick_validate = dasd_eckd_kick_validate_server,
5db8440c 6575 .check_attention = dasd_eckd_check_attention,
5a3b7b11
SH		 6576 .host_access_count = dasd_eckd_host_access_count,
6577 .hosts_print = dasd_hosts_print,
a521b048
SH		 6578 .handle_hpf_error = dasd_eckd_handle_hpf_error,
6579 .disable_hpf = dasd_eckd_disable_hpf_device,
6580 .hpf_enabled = dasd_eckd_hpf_enabled,
6581 .reset_path = dasd_eckd_reset_path,
c729696b
JH		 6582 .is_ese = dasd_eckd_is_ese,
6583 .space_allocated = dasd_eckd_space_allocated,
6584 .space_configured = dasd_eckd_space_configured,
6585 .logical_capacity = dasd_eckd_logical_capacity,
91dc4a19 6586 .release_space = dasd_eckd_release_space,
c729696b
JH		 6587 .ext_pool_id = dasd_eckd_ext_pool_id,
6588 .ext_size = dasd_eckd_ext_size,
6589 .ext_pool_cap_at_warnlevel = dasd_eckd_ext_pool_cap_at_warnlevel,
6590 .ext_pool_warn_thrshld = dasd_eckd_ext_pool_warn_thrshld,
6591 .ext_pool_oos = dasd_eckd_ext_pool_oos,
9e12e54c 6592 .ext_pool_exhaust = dasd_eckd_ext_pool_exhaust,
5e2b17e7
JH		 6593 .ese_format = dasd_eckd_ese_format,
6594 .ese_read = dasd_eckd_ese_read,
1da177e4
LT		 6595};
6596
6597static int __init
6598dasd_eckd_init(void)
6599{
736e6ea0
SO		 6600 int ret;
6601
1da177e4 6602 ASCEBC(dasd_eckd_discipline.ebcname, 4);
f932bcea
SW		 6603 dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req),
6604 GFP_KERNEL | GFP_DMA);
6605 if (!dasd_reserve_req)
6606 return -ENOMEM;
9e12e54c
JH		 6607 dasd_vol_info_req = kmalloc(sizeof(*dasd_vol_info_req),
6608 GFP_KERNEL | GFP_DMA);
6609 if (!dasd_vol_info_req)
6610 return -ENOMEM;
a4d26c6a
SW		 6611 path_verification_worker = kmalloc(sizeof(*path_verification_worker),
6612 GFP_KERNEL | GFP_DMA);
6613 if (!path_verification_worker) {
6614 kfree(dasd_reserve_req);
9e12e54c 6615 kfree(dasd_vol_info_req);
a4d26c6a
SW		 6616 return -ENOMEM;
6617 }
558b9ef0
SW		 6618 rawpadpage = (void *)__get_free_page(GFP_KERNEL);
6619 if (!rawpadpage) {
6620 kfree(path_verification_worker);
6621 kfree(dasd_reserve_req);
9e12e54c 6622 kfree(dasd_vol_info_req);
558b9ef0
SW		 6623 return -ENOMEM;
6624 }
736e6ea0
SO		 6625 ret = ccw_driver_register(&dasd_eckd_driver);
6626 if (!ret)
6627 wait_for_device_probe();
a4d26c6a
SW		 6628 else {
6629 kfree(path_verification_worker);
f932bcea 6630 kfree(dasd_reserve_req);
9e12e54c 6631 kfree(dasd_vol_info_req);
558b9ef0 6632 free_page((unsigned long)rawpadpage);
a4d26c6a 6633 }
736e6ea0 6634 return ret;
1da177e4
LT		 6635}
6636
6637static void __exit
6638dasd_eckd_cleanup(void)
6639{
6640 ccw_driver_unregister(&dasd_eckd_driver);
a4d26c6a 6641 kfree(path_verification_worker);
f932bcea 6642 kfree(dasd_reserve_req);
558b9ef0 6643 free_page((unsigned long)rawpadpage);
1da177e4
LT		 6644}
6645
6646module_init(dasd_eckd_init);
6647module_exit(dasd_eckd_cleanup);
Linux 6.x block layer and io_uring tree(s)