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s390/dasd: Put sub-order definitions in a separate section
[linux-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
a4d26c6a
SW		 92/* definitions for the path verification worker */
93struct path_verification_work_data {
94 struct work_struct worker;
95 struct dasd_device *device;
96 struct dasd_ccw_req cqr;
97 struct ccw1 ccw;
98 __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE];
99 int isglobal;
100 __u8 tbvpm;
101};
102static struct path_verification_work_data *path_verification_worker;
103static DEFINE_MUTEX(dasd_path_verification_mutex);
eb6e199b 104
5db8440c
SH		 105struct check_attention_work_data {
106 struct work_struct worker;
107 struct dasd_device *device;
108 __u8 lpum;
109};
110
8fd57520
JH		 111static int prepare_itcw(struct itcw *, unsigned int, unsigned int, int,
112 struct dasd_device *, struct dasd_device *,
113 unsigned int, int, unsigned int, unsigned int,
114 unsigned int, unsigned int);
115
1da177e4
LT		 116/* initial attempt at a probe function. this can be simplified once
117 * the other detection code is gone */
118static int
119dasd_eckd_probe (struct ccw_device *cdev)
120{
121 int ret;
122
40545573 123 /* set ECKD specific ccw-device options */
454e1fa1
PO		 124 ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE |
125 CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH);
40545573 126 if (ret) {
b8ed5dd5
SH		 127 DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s",
128 "dasd_eckd_probe: could not set "
129 "ccw-device options");
1da177e4 130 return ret;
40545573
HH		 131 }
132 ret = dasd_generic_probe(cdev, &dasd_eckd_discipline);
133 return ret;
1da177e4
LT		 134}
135
136static int
137dasd_eckd_set_online(struct ccw_device *cdev)
138{
40545573 139 return dasd_generic_set_online(cdev, &dasd_eckd_discipline);
1da177e4
LT		 140}
141
1da177e4
LT		 142static const int sizes_trk0[] = { 28, 148, 84 };
143#define LABEL_SIZE 140
144
3bc9fef9 145/* head and record addresses of count_area read in analysis ccw */
ce6915f5 146static const int count_area_head[] = { 0, 0, 0, 0, 1 };
3bc9fef9
SH		 147static const int count_area_rec[] = { 1, 2, 3, 4, 1 };
148
1da177e4
LT		 149static inline unsigned int
150ceil_quot(unsigned int d1, unsigned int d2)
151{
152 return (d1 + (d2 - 1)) / d2;
153}
154
4d284cac 155static unsigned int
1da177e4
LT		 156recs_per_track(struct dasd_eckd_characteristics * rdc,
157 unsigned int kl, unsigned int dl)
158{
159 int dn, kn;
160
161 switch (rdc->dev_type) {
162 case 0x3380:
163 if (kl)
164 return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) +
165 ceil_quot(dl + 12, 32));
166 else
167 return 1499 / (15 + ceil_quot(dl + 12, 32));
168 case 0x3390:
169 dn = ceil_quot(dl + 6, 232) + 1;
170 if (kl) {
171 kn = ceil_quot(kl + 6, 232) + 1;
172 return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) +
173 9 + ceil_quot(dl + 6 * dn, 34));
174 } else
175 return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34));
176 case 0x9345:
177 dn = ceil_quot(dl + 6, 232) + 1;
178 if (kl) {
179 kn = ceil_quot(kl + 6, 232) + 1;
180 return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) +
181 ceil_quot(dl + 6 * dn, 34));
182 } else
183 return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34));
184 }
185 return 0;
186}
187
b44b0ab3
SW		 188static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head)
189{
190 geo->cyl = (__u16) cyl;
191 geo->head = cyl >> 16;
192 geo->head <<= 4;
193 geo->head |= head;
194}
195
5628683c 196static int set_timestamp(struct ccw1 *ccw, struct DE_eckd_data *data,
45f186be 197 struct dasd_device *device)
1da177e4 198{
543691a4 199 struct dasd_eckd_private *private = device->private;
d54853ef 200 int rc;
1da177e4 201
5628683c
SH		 202 rc = get_phys_clock(&data->ep_sys_time);
203 /*
204 * Ignore return code if XRC is not supported or
205 * sync clock is switched off
206 */
207 if ((rc && !private->rdc_data.facilities.XRC_supported) ||
208 rc == -EOPNOTSUPP || rc == -EACCES)
d54853ef 209 return 0;
1da177e4 210
45f186be 211 /* switch on System Time Stamp - needed for XRC Support */
d54853ef
MS		 212 data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */
213 data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */
1da177e4 214
45f186be
JH		 215 if (ccw) {
216 ccw->count = sizeof(struct DE_eckd_data);
217 ccw->flags |= CCW_FLAG_SLI;
218 }
219
d54853ef
MS		 220 return rc;
221}
1da177e4 222
4d284cac 223static int
b44b0ab3 224define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk,
45f186be
JH		 225 unsigned int totrk, int cmd, struct dasd_device *device,
226 int blksize)
1da177e4 227{
543691a4 228 struct dasd_eckd_private *private = device->private;
b44b0ab3 229 u16 heads, beghead, endhead;
45f186be 230 u32 begcyl, endcyl;
d54853ef 231 int rc = 0;
1da177e4 232
45f186be
JH		 233 if (ccw) {
234 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT;
235 ccw->flags = 0;
236 ccw->count = 16;
237 ccw->cda = (__u32)__pa(data);
238 }
1da177e4 239
8e09f215 240 memset(data, 0, sizeof(struct DE_eckd_data));
1da177e4
LT		 241 switch (cmd) {
242 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
243 case DASD_ECKD_CCW_READ_RECORD_ZERO:
244 case DASD_ECKD_CCW_READ:
245 case DASD_ECKD_CCW_READ_MT:
246 case DASD_ECKD_CCW_READ_CKD:
247 case DASD_ECKD_CCW_READ_CKD_MT:
248 case DASD_ECKD_CCW_READ_KD:
249 case DASD_ECKD_CCW_READ_KD_MT:
1da177e4
LT		 250 data->mask.perm = 0x1;
251 data->attributes.operation = private->attrib.operation;
252 break;
8fd57520
JH		 253 case DASD_ECKD_CCW_READ_COUNT:
254 data->mask.perm = 0x1;
255 data->attributes.operation = DASD_BYPASS_CACHE;
256 break;
45f186be
JH		 257 case DASD_ECKD_CCW_READ_TRACK:
258 case DASD_ECKD_CCW_READ_TRACK_DATA:
259 data->mask.perm = 0x1;
260 data->attributes.operation = private->attrib.operation;
261 data->blk_size = 0;
262 break;
1da177e4
LT		 263 case DASD_ECKD_CCW_WRITE:
264 case DASD_ECKD_CCW_WRITE_MT:
265 case DASD_ECKD_CCW_WRITE_KD:
266 case DASD_ECKD_CCW_WRITE_KD_MT:
267 data->mask.perm = 0x02;
268 data->attributes.operation = private->attrib.operation;
5628683c 269 rc = set_timestamp(ccw, data, device);
1da177e4
LT		 270 break;
271 case DASD_ECKD_CCW_WRITE_CKD:
272 case DASD_ECKD_CCW_WRITE_CKD_MT:
273 data->attributes.operation = DASD_BYPASS_CACHE;
5628683c 274 rc = set_timestamp(ccw, data, device);
1da177e4
LT		 275 break;
276 case DASD_ECKD_CCW_ERASE:
277 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
278 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
279 data->mask.perm = 0x3;
280 data->mask.auth = 0x1;
281 data->attributes.operation = DASD_BYPASS_CACHE;
5628683c 282 rc = set_timestamp(ccw, data, device);
45f186be
JH		 283 break;
284 case DASD_ECKD_CCW_WRITE_FULL_TRACK:
285 data->mask.perm = 0x03;
286 data->attributes.operation = private->attrib.operation;
287 data->blk_size = 0;
288 break;
289 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
290 data->mask.perm = 0x02;
291 data->attributes.operation = private->attrib.operation;
292 data->blk_size = blksize;
5628683c 293 rc = set_timestamp(ccw, data, device);
1da177e4
LT		 294 break;
295 default:
fc19f381
SH		 296 dev_err(&device->cdev->dev,
297 "0x%x is not a known command\n", cmd);
1da177e4
LT		 298 break;
299 }
300
301 data->attributes.mode = 0x3; /* ECKD */
302
303 if ((private->rdc_data.cu_type == 0x2105 ||
304 private->rdc_data.cu_type == 0x2107 ||
305 private->rdc_data.cu_type == 0x1750)
306 && !(private->uses_cdl && trk < 2))
307 data->ga_extended |= 0x40; /* Regular Data Format Mode */
308
b44b0ab3
SW		 309 heads = private->rdc_data.trk_per_cyl;
310 begcyl = trk / heads;
311 beghead = trk % heads;
312 endcyl = totrk / heads;
313 endhead = totrk % heads;
1da177e4
LT		 314
315 /* check for sequential prestage - enhance cylinder range */
316 if (data->attributes.operation == DASD_SEQ_PRESTAGE ||
317 data->attributes.operation == DASD_SEQ_ACCESS) {
138c014d 318
b44b0ab3
SW		 319 if (endcyl + private->attrib.nr_cyl < private->real_cyl)
320 endcyl += private->attrib.nr_cyl;
1da177e4 321 else
b44b0ab3 322 endcyl = (private->real_cyl - 1);
1da177e4
LT		 323 }
324
b44b0ab3
SW		 325 set_ch_t(&data->beg_ext, begcyl, beghead);
326 set_ch_t(&data->end_ext, endcyl, endhead);
d54853ef 327 return rc;
1da177e4
LT		 328}
329
8e09f215 330
45f186be
JH		 331static void locate_record_ext(struct ccw1 *ccw, struct LRE_eckd_data *data,
332 unsigned int trk, unsigned int rec_on_trk,
333 int count, int cmd, struct dasd_device *device,
334 unsigned int reclen, unsigned int tlf)
f3eb5384 335{
543691a4 336 struct dasd_eckd_private *private = device->private;
f3eb5384
SW		 337 int sector;
338 int dn, d;
339
45f186be
JH		 340 if (ccw) {
341 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD_EXT;
342 ccw->flags = 0;
343 if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK)
344 ccw->count = 22;
345 else
346 ccw->count = 20;
347 ccw->cda = (__u32)__pa(data);
348 }
349
f3eb5384
SW		 350 memset(data, 0, sizeof(*data));
351 sector = 0;
352 if (rec_on_trk) {
353 switch (private->rdc_data.dev_type) {
354 case 0x3390:
355 dn = ceil_quot(reclen + 6, 232);
356 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
357 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
358 break;
359 case 0x3380:
360 d = 7 + ceil_quot(reclen + 12, 32);
361 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
362 break;
363 }
364 }
365 data->sector = sector;
366 /* note: meaning of count depends on the operation
367 * for record based I/O it's the number of records, but for
368 * track based I/O it's the number of tracks
369 */
370 data->count = count;
371 switch (cmd) {
372 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
373 data->operation.orientation = 0x3;
374 data->operation.operation = 0x03;
375 break;
376 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
377 data->operation.orientation = 0x3;
378 data->operation.operation = 0x16;
379 break;
380 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
381 data->operation.orientation = 0x1;
382 data->operation.operation = 0x03;
383 data->count++;
384 break;
385 case DASD_ECKD_CCW_READ_RECORD_ZERO:
386 data->operation.orientation = 0x3;
387 data->operation.operation = 0x16;
388 data->count++;
389 break;
390 case DASD_ECKD_CCW_WRITE:
391 case DASD_ECKD_CCW_WRITE_MT:
392 case DASD_ECKD_CCW_WRITE_KD:
393 case DASD_ECKD_CCW_WRITE_KD_MT:
394 data->auxiliary.length_valid = 0x1;
395 data->length = reclen;
396 data->operation.operation = 0x01;
397 break;
398 case DASD_ECKD_CCW_WRITE_CKD:
399 case DASD_ECKD_CCW_WRITE_CKD_MT:
400 data->auxiliary.length_valid = 0x1;
401 data->length = reclen;
402 data->operation.operation = 0x03;
403 break;
e4dbb0f2
SH		 404 case DASD_ECKD_CCW_WRITE_FULL_TRACK:
405 data->operation.orientation = 0x0;
406 data->operation.operation = 0x3F;
407 data->extended_operation = 0x11;
408 data->length = 0;
409 data->extended_parameter_length = 0x02;
410 if (data->count > 8) {
411 data->extended_parameter[0] = 0xFF;
412 data->extended_parameter[1] = 0xFF;
413 data->extended_parameter[1] <<= (16 - count);
414 } else {
415 data->extended_parameter[0] = 0xFF;
416 data->extended_parameter[0] <<= (8 - count);
417 data->extended_parameter[1] = 0x00;
418 }
419 data->sector = 0xFF;
420 break;
f3eb5384
SW		 421 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
422 data->auxiliary.length_valid = 0x1;
423 data->length = reclen; /* not tlf, as one might think */
424 data->operation.operation = 0x3F;
425 data->extended_operation = 0x23;
426 break;
427 case DASD_ECKD_CCW_READ:
428 case DASD_ECKD_CCW_READ_MT:
429 case DASD_ECKD_CCW_READ_KD:
430 case DASD_ECKD_CCW_READ_KD_MT:
431 data->auxiliary.length_valid = 0x1;
432 data->length = reclen;
433 data->operation.operation = 0x06;
434 break;
435 case DASD_ECKD_CCW_READ_CKD:
436 case DASD_ECKD_CCW_READ_CKD_MT:
437 data->auxiliary.length_valid = 0x1;
438 data->length = reclen;
439 data->operation.operation = 0x16;
440 break;
441 case DASD_ECKD_CCW_READ_COUNT:
442 data->operation.operation = 0x06;
443 break;
e4dbb0f2
SH		 444 case DASD_ECKD_CCW_READ_TRACK:
445 data->operation.orientation = 0x1;
446 data->operation.operation = 0x0C;
447 data->extended_parameter_length = 0;
448 data->sector = 0xFF;
449 break;
f3eb5384
SW		 450 case DASD_ECKD_CCW_READ_TRACK_DATA:
451 data->auxiliary.length_valid = 0x1;
452 data->length = tlf;
453 data->operation.operation = 0x0C;
454 break;
455 case DASD_ECKD_CCW_ERASE:
456 data->length = reclen;
457 data->auxiliary.length_valid = 0x1;
458 data->operation.operation = 0x0b;
459 break;
460 default:
461 DBF_DEV_EVENT(DBF_ERR, device,
462 "fill LRE unknown opcode 0x%x", cmd);
463 BUG();
464 }
465 set_ch_t(&data->seek_addr,
466 trk / private->rdc_data.trk_per_cyl,
467 trk % private->rdc_data.trk_per_cyl);
468 data->search_arg.cyl = data->seek_addr.cyl;
469 data->search_arg.head = data->seek_addr.head;
470 data->search_arg.record = rec_on_trk;
471}
472
473static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
474 unsigned int trk, unsigned int totrk, int cmd,
475 struct dasd_device *basedev, struct dasd_device *startdev,
45f186be 476 unsigned int format, unsigned int rec_on_trk, int count,
f3eb5384 477 unsigned int blksize, unsigned int tlf)
8e09f215
SW		 478{
479 struct dasd_eckd_private *basepriv, *startpriv;
f3eb5384 480 struct LRE_eckd_data *lredata;
45f186be 481 struct DE_eckd_data *dedata;
8e09f215
SW		 482 int rc = 0;
483
543691a4
SO		 484 basepriv = basedev->private;
485 startpriv = startdev->private;
f3eb5384
SW		 486 dedata = &pfxdata->define_extent;
487 lredata = &pfxdata->locate_record;
8e09f215
SW		 488
489 ccw->cmd_code = DASD_ECKD_CCW_PFX;
490 ccw->flags = 0;
e4dbb0f2
SH		 491 if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) {
492 ccw->count = sizeof(*pfxdata) + 2;
493 ccw->cda = (__u32) __pa(pfxdata);
494 memset(pfxdata, 0, sizeof(*pfxdata) + 2);
495 } else {
496 ccw->count = sizeof(*pfxdata);
497 ccw->cda = (__u32) __pa(pfxdata);
498 memset(pfxdata, 0, sizeof(*pfxdata));
499 }
8e09f215 500
8e09f215 501 /* prefix data */
f3eb5384
SW		 502 if (format > 1) {
503 DBF_DEV_EVENT(DBF_ERR, basedev,
504 "PFX LRE unknown format 0x%x", format);
505 BUG();
506 return -EINVAL;
507 }
508 pfxdata->format = format;
4abb08c2
SW		 509 pfxdata->base_address = basepriv->ned->unit_addr;
510 pfxdata->base_lss = basepriv->ned->ID;
f3eb5384 511 pfxdata->validity.define_extent = 1;
8e09f215
SW		 512
513 /* private uid is kept up to date, conf_data may be outdated */
da340f92 514 if (startpriv->uid.type == UA_BASE_PAV_ALIAS)
8e09f215 515 pfxdata->validity.verify_base = 1;
da340f92
SH		 516
517 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) {
518 pfxdata->validity.verify_base = 1;
519 pfxdata->validity.hyper_pav = 1;
8e09f215
SW		 520 }
521
45f186be 522 rc = define_extent(NULL, dedata, trk, totrk, cmd, basedev, blksize);
8e09f215 523
45f186be
JH		 524 /*
525 * For some commands the System Time Stamp is set in the define extent
526 * data when XRC is supported. The validity of the time stamp must be
527 * reflected in the prefix data as well.
528 */
529 if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02)
530 pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */
f3eb5384
SW		 531
532 if (format == 1) {
45f186be
JH		 533 locate_record_ext(NULL, lredata, trk, rec_on_trk, count, cmd,
534 basedev, blksize, tlf);
f3eb5384
SW		 535 }
536
8e09f215
SW		 537 return rc;
538}
539
f3eb5384
SW		 540static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
541 unsigned int trk, unsigned int totrk, int cmd,
542 struct dasd_device *basedev, struct dasd_device *startdev)
543{
544 return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev,
545 0, 0, 0, 0, 0);
546}
547
4d284cac 548static void
b44b0ab3
SW		 549locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk,
550 unsigned int rec_on_trk, int no_rec, int cmd,
1da177e4
LT		 551 struct dasd_device * device, int reclen)
552{
543691a4 553 struct dasd_eckd_private *private = device->private;
1da177e4
LT		 554 int sector;
555 int dn, d;
138c014d 556
1da177e4
LT		 557 DBF_DEV_EVENT(DBF_INFO, device,
558 "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d",
559 trk, rec_on_trk, no_rec, cmd, reclen);
560
561 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD;
562 ccw->flags = 0;
563 ccw->count = 16;
564 ccw->cda = (__u32) __pa(data);
565
8e09f215 566 memset(data, 0, sizeof(struct LO_eckd_data));
1da177e4
LT		 567 sector = 0;
568 if (rec_on_trk) {
569 switch (private->rdc_data.dev_type) {
570 case 0x3390:
571 dn = ceil_quot(reclen + 6, 232);
572 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
573 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
574 break;
575 case 0x3380:
576 d = 7 + ceil_quot(reclen + 12, 32);
577 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
578 break;
579 }
580 }
581 data->sector = sector;
582 data->count = no_rec;
583 switch (cmd) {
584 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
585 data->operation.orientation = 0x3;
586 data->operation.operation = 0x03;
587 break;
588 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
589 data->operation.orientation = 0x3;
590 data->operation.operation = 0x16;
591 break;
592 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
593 data->operation.orientation = 0x1;
594 data->operation.operation = 0x03;
595 data->count++;
596 break;
597 case DASD_ECKD_CCW_READ_RECORD_ZERO:
598 data->operation.orientation = 0x3;
599 data->operation.operation = 0x16;
600 data->count++;
601 break;
602 case DASD_ECKD_CCW_WRITE:
603 case DASD_ECKD_CCW_WRITE_MT:
604 case DASD_ECKD_CCW_WRITE_KD:
605 case DASD_ECKD_CCW_WRITE_KD_MT:
606 data->auxiliary.last_bytes_used = 0x1;
607 data->length = reclen;
608 data->operation.operation = 0x01;
609 break;
610 case DASD_ECKD_CCW_WRITE_CKD:
611 case DASD_ECKD_CCW_WRITE_CKD_MT:
612 data->auxiliary.last_bytes_used = 0x1;
613 data->length = reclen;
614 data->operation.operation = 0x03;
615 break;
616 case DASD_ECKD_CCW_READ:
617 case DASD_ECKD_CCW_READ_MT:
618 case DASD_ECKD_CCW_READ_KD:
619 case DASD_ECKD_CCW_READ_KD_MT:
620 data->auxiliary.last_bytes_used = 0x1;
621 data->length = reclen;
622 data->operation.operation = 0x06;
623 break;
624 case DASD_ECKD_CCW_READ_CKD:
625 case DASD_ECKD_CCW_READ_CKD_MT:
626 data->auxiliary.last_bytes_used = 0x1;
627 data->length = reclen;
628 data->operation.operation = 0x16;
629 break;
630 case DASD_ECKD_CCW_READ_COUNT:
631 data->operation.operation = 0x06;
632 break;
633 case DASD_ECKD_CCW_ERASE:
634 data->length = reclen;
635 data->auxiliary.last_bytes_used = 0x1;
636 data->operation.operation = 0x0b;
637 break;
638 default:
fc19f381
SH		 639 DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record "
640 "opcode 0x%x", cmd);
1da177e4 641 }
b44b0ab3
SW		 642 set_ch_t(&data->seek_addr,
643 trk / private->rdc_data.trk_per_cyl,
644 trk % private->rdc_data.trk_per_cyl);
645 data->search_arg.cyl = data->seek_addr.cyl;
646 data->search_arg.head = data->seek_addr.head;
1da177e4
LT		 647 data->search_arg.record = rec_on_trk;
648}
649
650/*
651 * Returns 1 if the block is one of the special blocks that needs
652 * to get read/written with the KD variant of the command.
653 * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and
654 * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT.
655 * Luckily the KD variants differ only by one bit (0x08) from the
656 * normal variant. So don't wonder about code like:
657 * if (dasd_eckd_cdl_special(blk_per_trk, recid))
658 * ccw->cmd_code |= 0x8;
659 */
660static inline int
661dasd_eckd_cdl_special(int blk_per_trk, int recid)
662{
663 if (recid < 3)
664 return 1;
665 if (recid < blk_per_trk)
666 return 0;
667 if (recid < 2 * blk_per_trk)
668 return 1;
669 return 0;
670}
671
672/*
673 * Returns the record size for the special blocks of the cdl format.
674 * Only returns something useful if dasd_eckd_cdl_special is true
675 * for the recid.
676 */
677static inline int
678dasd_eckd_cdl_reclen(int recid)
679{
680 if (recid < 3)
681 return sizes_trk0[recid];
682 return LABEL_SIZE;
683}
b206181d
SH		 684/* create unique id from private structure. */
685static void create_uid(struct dasd_eckd_private *private)
3d052595 686{
4abb08c2 687 int count;
b206181d 688 struct dasd_uid *uid;
3d052595 689
2dedf0d9 690 uid = &private->uid;
3d052595 691 memset(uid, 0, sizeof(struct dasd_uid));
4abb08c2 692 memcpy(uid->vendor, private->ned->HDA_manufacturer,
d0710c7c 693 sizeof(uid->vendor) - 1);
3d052595 694 EBCASC(uid->vendor, sizeof(uid->vendor) - 1);
4abb08c2 695 memcpy(uid->serial, private->ned->HDA_location,
d0710c7c 696 sizeof(uid->serial) - 1);
3d052595 697 EBCASC(uid->serial, sizeof(uid->serial) - 1);
4abb08c2 698 uid->ssid = private->gneq->subsystemID;
a419aef8 699 uid->real_unit_addr = private->ned->unit_addr;
4abb08c2
SW		 700 if (private->sneq) {
701 uid->type = private->sneq->sua_flags;
8e09f215 702 if (uid->type == UA_BASE_PAV_ALIAS)
4abb08c2 703 uid->base_unit_addr = private->sneq->base_unit_addr;
8e09f215
SW		 704 } else {
705 uid->type = UA_BASE_DEVICE;
706 }
4abb08c2
SW		 707 if (private->vdsneq) {
708 for (count = 0; count < 16; count++) {
709 sprintf(uid->vduit+2*count, "%02x",
710 private->vdsneq->uit[count]);
711 }
712 }
b206181d
SH		 713}
714
715/*
716 * Generate device unique id that specifies the physical device.
717 */
718static int dasd_eckd_generate_uid(struct dasd_device *device)
719{
543691a4 720 struct dasd_eckd_private *private = device->private;
b206181d
SH		 721 unsigned long flags;
722
b206181d
SH		 723 if (!private)
724 return -ENODEV;
725 if (!private->ned || !private->gneq)
726 return -ENODEV;
727 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
728 create_uid(private);
2dedf0d9 729 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
3d052595
HH		 730 return 0;
731}
732
2dedf0d9
SH		 733static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid)
734{
543691a4 735 struct dasd_eckd_private *private = device->private;
2dedf0d9
SH		 736 unsigned long flags;
737
543691a4 738 if (private) {
2dedf0d9
SH		 739 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
740 *uid = private->uid;
741 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
742 return 0;
743 }
744 return -EINVAL;
745}
746
b206181d
SH		 747/*
748 * compare device UID with data of a given dasd_eckd_private structure
749 * return 0 for match
750 */
751static int dasd_eckd_compare_path_uid(struct dasd_device *device,
752 struct dasd_eckd_private *private)
753{
754 struct dasd_uid device_uid;
755
756 create_uid(private);
757 dasd_eckd_get_uid(device, &device_uid);
758
759 return memcmp(&device_uid, &private->uid, sizeof(struct dasd_uid));
760}
761
a4d26c6a
SW		 762static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device,
763 struct dasd_ccw_req *cqr,
764 __u8 *rcd_buffer,
765 __u8 lpm)
17283b56 766{
17283b56 767 struct ccw1 *ccw;
a4d26c6a
SW		 768 /*
769 * buffer has to start with EBCDIC "V1.0" to show
770 * support for virtual device SNEQ
771 */
772 rcd_buffer[0] = 0xE5;
773 rcd_buffer[1] = 0xF1;
774 rcd_buffer[2] = 0x4B;
775 rcd_buffer[3] = 0xF0;
17283b56
CH		 776
777 ccw = cqr->cpaddr;
a4d26c6a
SW		 778 ccw->cmd_code = DASD_ECKD_CCW_RCD;
779 ccw->flags = 0;
17283b56 780 ccw->cda = (__u32)(addr_t)rcd_buffer;
a4d26c6a
SW		 781 ccw->count = DASD_ECKD_RCD_DATA_SIZE;
782 cqr->magic = DASD_ECKD_MAGIC;
17283b56 783
8e09f215
SW		 784 cqr->startdev = device;
785 cqr->memdev = device;
786 cqr->block = NULL;
17283b56
CH		 787 cqr->expires = 10*HZ;
788 cqr->lpm = lpm;
eb6e199b 789 cqr->retries = 256;
1aae0560 790 cqr->buildclk = get_tod_clock();
17283b56 791 cqr->status = DASD_CQR_FILLED;
a4d26c6a
SW		 792 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags);
793}
794
5915a873
SH		 795/*
796 * Wakeup helper for read_conf
797 * if the cqr is not done and needs some error recovery
798 * the buffer has to be re-initialized with the EBCDIC "V1.0"
799 * to show support for virtual device SNEQ
800 */
801static void read_conf_cb(struct dasd_ccw_req *cqr, void *data)
802{
803 struct ccw1 *ccw;
804 __u8 *rcd_buffer;
805
806 if (cqr->status != DASD_CQR_DONE) {
807 ccw = cqr->cpaddr;
808 rcd_buffer = (__u8 *)((addr_t) ccw->cda);
809 memset(rcd_buffer, 0, sizeof(*rcd_buffer));
810
811 rcd_buffer[0] = 0xE5;
812 rcd_buffer[1] = 0xF1;
813 rcd_buffer[2] = 0x4B;
814 rcd_buffer[3] = 0xF0;
815 }
816 dasd_wakeup_cb(cqr, data);
817}
818
a4d26c6a
SW		 819static int dasd_eckd_read_conf_immediately(struct dasd_device *device,
820 struct dasd_ccw_req *cqr,
821 __u8 *rcd_buffer,
822 __u8 lpm)
823{
824 struct ciw *ciw;
825 int rc;
826 /*
827 * sanity check: scan for RCD command in extended SenseID data
828 * some devices do not support RCD
829 */
830 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD);
831 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD)
832 return -EOPNOTSUPP;
833
834 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm);
835 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
5a27e60d 836 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags);
a4d26c6a 837 cqr->retries = 5;
5915a873 838 cqr->callback = read_conf_cb;
a4d26c6a
SW		 839 rc = dasd_sleep_on_immediatly(cqr);
840 return rc;
17283b56
CH		 841}
842
843static int dasd_eckd_read_conf_lpm(struct dasd_device *device,
844 void **rcd_buffer,
845 int *rcd_buffer_size, __u8 lpm)
846{
847 struct ciw *ciw;
848 char *rcd_buf = NULL;
849 int ret;
850 struct dasd_ccw_req *cqr;
851
852 /*
a4d26c6a
SW		 853 * sanity check: scan for RCD command in extended SenseID data
854 * some devices do not support RCD
17283b56
CH		 855 */
856 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD);
a4d26c6a 857 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) {
17283b56
CH		 858 ret = -EOPNOTSUPP;
859 goto out_error;
860 }
a4d26c6a 861 rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA);
17283b56
CH		 862 if (!rcd_buf) {
863 ret = -ENOMEM;
864 goto out_error;
865 }
a4d26c6a
SW		 866 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */,
867 0, /* use rcd_buf as data ara */
c5205f2f 868 device, NULL);
17283b56 869 if (IS_ERR(cqr)) {
a4d26c6a
SW		 870 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
871 "Could not allocate RCD request");
872 ret = -ENOMEM;
17283b56
CH		 873 goto out_error;
874 }
a4d26c6a 875 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm);
5915a873 876 cqr->callback = read_conf_cb;
17283b56
CH		 877 ret = dasd_sleep_on(cqr);
878 /*
879 * on success we update the user input parms
880 */
8e09f215 881 dasd_sfree_request(cqr, cqr->memdev);
17283b56
CH		 882 if (ret)
883 goto out_error;
884
a4d26c6a 885 *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE;
17283b56
CH		 886 *rcd_buffer = rcd_buf;
887 return 0;
888out_error:
889 kfree(rcd_buf);
890 *rcd_buffer = NULL;
891 *rcd_buffer_size = 0;
892 return ret;
893}
894
4abb08c2
SW		 895static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private)
896{
897
898 struct dasd_sneq *sneq;
899 int i, count;
900
901 private->ned = NULL;
902 private->sneq = NULL;
903 private->vdsneq = NULL;
904 private->gneq = NULL;
905 count = private->conf_len / sizeof(struct dasd_sneq);
906 sneq = (struct dasd_sneq *)private->conf_data;
907 for (i = 0; i < count; ++i) {
908 if (sneq->flags.identifier == 1 && sneq->format == 1)
909 private->sneq = sneq;
910 else if (sneq->flags.identifier == 1 && sneq->format == 4)
911 private->vdsneq = (struct vd_sneq *)sneq;
912 else if (sneq->flags.identifier == 2)
913 private->gneq = (struct dasd_gneq *)sneq;
914 else if (sneq->flags.identifier == 3 && sneq->res1 == 1)
915 private->ned = (struct dasd_ned *)sneq;
916 sneq++;
917 }
918 if (!private->ned || !private->gneq) {
919 private->ned = NULL;
920 private->sneq = NULL;
921 private->vdsneq = NULL;
922 private->gneq = NULL;
923 return -EINVAL;
924 }
925 return 0;
926
927};
928
929static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len)
930{
931 struct dasd_gneq *gneq;
932 int i, count, found;
933
934 count = conf_len / sizeof(*gneq);
935 gneq = (struct dasd_gneq *)conf_data;
936 found = 0;
937 for (i = 0; i < count; ++i) {
938 if (gneq->flags.identifier == 2) {
939 found = 1;
940 break;
941 }
942 gneq++;
943 }
944 if (found)
945 return ((char *)gneq)[18] & 0x07;
946 else
947 return 0;
948}
949
c7c0c9de
SH		 950static void dasd_eckd_clear_conf_data(struct dasd_device *device)
951{
543691a4 952 struct dasd_eckd_private *private = device->private;
c7c0c9de
SH		 953 int i;
954
c7c0c9de
SH		 955 private->conf_data = NULL;
956 private->conf_len = 0;
957 for (i = 0; i < 8; i++) {
c9346151
SH		 958 kfree(device->path[i].conf_data);
959 device->path[i].conf_data = NULL;
a521b048
SH		 960 device->path[i].cssid = 0;
961 device->path[i].ssid = 0;
962 device->path[i].chpid = 0;
c7c0c9de
SH		 963 }
964}
965
966
4abb08c2 967static int dasd_eckd_read_conf(struct dasd_device *device)
1da177e4
LT		 968{
969 void *conf_data;
970 int conf_len, conf_data_saved;
b179b037 971 int rc, path_err, pos;
a4d26c6a 972 __u8 lpm, opm;
b206181d 973 struct dasd_eckd_private *private, path_private;
b206181d
SH		 974 struct dasd_uid *uid;
975 char print_path_uid[60], print_device_uid[60];
ded27d8d 976 struct channel_path_desc_fmt0 *chp_desc;
a521b048 977 struct subchannel_id sch_id;
1da177e4 978
543691a4 979 private = device->private;
a4d26c6a 980 opm = ccw_device_get_path_mask(device->cdev);
a521b048 981 ccw_device_get_schid(device->cdev, &sch_id);
1da177e4 982 conf_data_saved = 0;
55d3a85c 983 path_err = 0;
1da177e4
LT		 984 /* get configuration data per operational path */
985 for (lpm = 0x80; lpm; lpm>>= 1) {
b206181d
SH		 986 if (!(lpm & opm))
987 continue;
988 rc = dasd_eckd_read_conf_lpm(device, &conf_data,
989 &conf_len, lpm);
990 if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */
991 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
992 "Read configuration data returned "
993 "error %d", rc);
994 return rc;
995 }
996 if (conf_data == NULL) {
997 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
998 "No configuration data "
999 "retrieved");
1000 /* no further analysis possible */
c9346151 1001 dasd_path_add_opm(device, opm);
b206181d
SH		 1002 continue; /* no error */
1003 }
1004 /* save first valid configuration data */
1005 if (!conf_data_saved) {
c7c0c9de
SH		 1006 /* initially clear previously stored conf_data */
1007 dasd_eckd_clear_conf_data(device);
b206181d
SH		 1008 private->conf_data = conf_data;
1009 private->conf_len = conf_len;
1010 if (dasd_eckd_identify_conf_parts(private)) {
1011 private->conf_data = NULL;
1012 private->conf_len = 0;
1013 kfree(conf_data);
1014 continue;
1da177e4 1015 }
c7c0c9de
SH		 1016 pos = pathmask_to_pos(lpm);
1017 /* store per path conf_data */
c9346151 1018 device->path[pos].conf_data = conf_data;
a521b048
SH		 1019 device->path[pos].cssid = sch_id.cssid;
1020 device->path[pos].ssid = sch_id.ssid;
1021 chp_desc = ccw_device_get_chp_desc(device->cdev, pos);
1022 if (chp_desc)
1023 device->path[pos].chpid = chp_desc->chpid;
1024 kfree(chp_desc);
b206181d
SH		 1025 /*
1026 * build device UID that other path data
1027 * can be compared to it
1028 */
1029 dasd_eckd_generate_uid(device);
1030 conf_data_saved++;
1031 } else {
1032 path_private.conf_data = conf_data;
1033 path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE;
1034 if (dasd_eckd_identify_conf_parts(
1035 &path_private)) {
1036 path_private.conf_data = NULL;
1037 path_private.conf_len = 0;
1038 kfree(conf_data);
1039 continue;
1da177e4 1040 }
b206181d
SH		 1041 if (dasd_eckd_compare_path_uid(
1042 device, &path_private)) {
1043 uid = &path_private.uid;
1044 if (strlen(uid->vduit) > 0)
1045 snprintf(print_path_uid,
1046 sizeof(print_path_uid),
1047 "%s.%s.%04x.%02x.%s",
1048 uid->vendor, uid->serial,
1049 uid->ssid, uid->real_unit_addr,
1050 uid->vduit);
1051 else
1052 snprintf(print_path_uid,
1053 sizeof(print_path_uid),
1054 "%s.%s.%04x.%02x",
1055 uid->vendor, uid->serial,
1056 uid->ssid,
1057 uid->real_unit_addr);
1058 uid = &private->uid;
1059 if (strlen(uid->vduit) > 0)
1060 snprintf(print_device_uid,
1061 sizeof(print_device_uid),
1062 "%s.%s.%04x.%02x.%s",
1063 uid->vendor, uid->serial,
1064 uid->ssid, uid->real_unit_addr,
1065 uid->vduit);
1066 else
1067 snprintf(print_device_uid,
1068 sizeof(print_device_uid),
1069 "%s.%s.%04x.%02x",
1070 uid->vendor, uid->serial,
1071 uid->ssid,
1072 uid->real_unit_addr);
1073 dev_err(&device->cdev->dev,
1074 "Not all channel paths lead to "
1075 "the same device, path %02X leads to "
1076 "device %s instead of %s\n", lpm,
1077 print_path_uid, print_device_uid);
55d3a85c 1078 path_err = -EINVAL;
c9346151 1079 dasd_path_add_cablepm(device, lpm);
55d3a85c 1080 continue;
1da177e4 1081 }
c7c0c9de
SH		 1082 pos = pathmask_to_pos(lpm);
1083 /* store per path conf_data */
c9346151 1084 device->path[pos].conf_data = conf_data;
a521b048
SH		 1085 device->path[pos].cssid = sch_id.cssid;
1086 device->path[pos].ssid = sch_id.ssid;
1087 chp_desc = ccw_device_get_chp_desc(device->cdev, pos);
1088 if (chp_desc)
1089 device->path[pos].chpid = chp_desc->chpid;
1090 kfree(chp_desc);
b206181d
SH		 1091 path_private.conf_data = NULL;
1092 path_private.conf_len = 0;
1093 }
1094 switch (dasd_eckd_path_access(conf_data, conf_len)) {
1095 case 0x02:
c9346151 1096 dasd_path_add_nppm(device, lpm);
b206181d
SH		 1097 break;
1098 case 0x03:
c9346151 1099 dasd_path_add_ppm(device, lpm);
b206181d 1100 break;
1da177e4 1101 }
c9346151
SH		 1102 if (!dasd_path_get_opm(device)) {
1103 dasd_path_set_opm(device, lpm);
ccc0e7dc
SH		 1104 dasd_generic_path_operational(device);
1105 } else {
c9346151 1106 dasd_path_add_opm(device, lpm);
ccc0e7dc 1107 }
1da177e4 1108 }
b206181d 1109
55d3a85c 1110 return path_err;
1da177e4
LT		 1111}
1112
a521b048
SH		 1113static u32 get_fcx_max_data(struct dasd_device *device)
1114{
1115 struct dasd_eckd_private *private = device->private;
1116 int fcx_in_css, fcx_in_gneq, fcx_in_features;
1117 int tpm, mdc;
1118
1119 if (dasd_nofcx)
1120 return 0;
1121 /* is transport mode supported? */
1122 fcx_in_css = css_general_characteristics.fcx;
1123 fcx_in_gneq = private->gneq->reserved2[7] & 0x04;
1124 fcx_in_features = private->features.feature[40] & 0x80;
1125 tpm = fcx_in_css && fcx_in_gneq && fcx_in_features;
1126
1127 if (!tpm)
1128 return 0;
1129
1130 mdc = ccw_device_get_mdc(device->cdev, 0);
1131 if (mdc < 0) {
1132 dev_warn(&device->cdev->dev, "Detecting the maximum supported data size for zHPF requests failed\n");
1133 return 0;
1134 } else {
1135 return (u32)mdc * FCX_MAX_DATA_FACTOR;
1136 }
1137}
1138
a4d26c6a
SW		 1139static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm)
1140{
543691a4 1141 struct dasd_eckd_private *private = device->private;
a4d26c6a
SW		 1142 int mdc;
1143 u32 fcx_max_data;
1144
a4d26c6a
SW		 1145 if (private->fcx_max_data) {
1146 mdc = ccw_device_get_mdc(device->cdev, lpm);
1147 if ((mdc < 0)) {
1148 dev_warn(&device->cdev->dev,
1149 "Detecting the maximum data size for zHPF "
1150 "requests failed (rc=%d) for a new path %x\n",
1151 mdc, lpm);
1152 return mdc;
1153 }
0f02c4e7 1154 fcx_max_data = (u32)mdc * FCX_MAX_DATA_FACTOR;
a4d26c6a
SW		 1155 if (fcx_max_data < private->fcx_max_data) {
1156 dev_warn(&device->cdev->dev,
1157 "The maximum data size for zHPF requests %u "
1158 "on a new path %x is below the active maximum "
1159 "%u\n", fcx_max_data, lpm,
1160 private->fcx_max_data);
1161 return -EACCES;
1162 }
1163 }
1164 return 0;
1165}
1166
b206181d
SH		 1167static int rebuild_device_uid(struct dasd_device *device,
1168 struct path_verification_work_data *data)
1169{
543691a4 1170 struct dasd_eckd_private *private = device->private;
c9346151 1171 __u8 lpm, opm = dasd_path_get_opm(device);
543691a4 1172 int rc = -ENODEV;
b206181d
SH		 1173
1174 for (lpm = 0x80; lpm; lpm >>= 1) {
1175 if (!(lpm & opm))
1176 continue;
1177 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer));
1178 memset(&data->cqr, 0, sizeof(data->cqr));
1179 data->cqr.cpaddr = &data->ccw;
1180 rc = dasd_eckd_read_conf_immediately(device, &data->cqr,
1181 data->rcd_buffer,
1182 lpm);
1183
1184 if (rc) {
1185 if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */
1186 continue;
1187 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1188 "Read configuration data "
1189 "returned error %d", rc);
1190 break;
1191 }
1192 memcpy(private->conf_data, data->rcd_buffer,
1193 DASD_ECKD_RCD_DATA_SIZE);
1194 if (dasd_eckd_identify_conf_parts(private)) {
1195 rc = -ENODEV;
1196 } else /* first valid path is enough */
1197 break;
1198 }
1199
1200 if (!rc)
1201 rc = dasd_eckd_generate_uid(device);
1202
1203 return rc;
1204}
1205
a4d26c6a
SW		 1206static void do_path_verification_work(struct work_struct *work)
1207{
1208 struct path_verification_work_data *data;
1209 struct dasd_device *device;
b206181d
SH		 1210 struct dasd_eckd_private path_private;
1211 struct dasd_uid *uid;
1212 __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE];
5db8440c 1213 __u8 lpm, opm, npm, ppm, epm, hpfpm, cablepm;
a4d26c6a 1214 unsigned long flags;
b206181d 1215 char print_uid[60];
a4d26c6a
SW		 1216 int rc;
1217
1218 data = container_of(work, struct path_verification_work_data, worker);
1219 device = data->device;
1220
c8d1c0ff
SH		 1221 /* delay path verification until device was resumed */
1222 if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) {
1223 schedule_work(work);
1224 return;
1225 }
1eb38023
SH		 1226 /* check if path verification already running and delay if so */
1227 if (test_and_set_bit(DASD_FLAG_PATH_VERIFY, &device->flags)) {
1228 schedule_work(work);
1229 return;
1230 }
a4d26c6a
SW		 1231 opm = 0;
1232 npm = 0;
1233 ppm = 0;
1234 epm = 0;
5db8440c
SH		 1235 hpfpm = 0;
1236 cablepm = 0;
1237
a4d26c6a 1238 for (lpm = 0x80; lpm; lpm >>= 1) {
b206181d
SH		 1239 if (!(lpm & data->tbvpm))
1240 continue;
1241 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer));
1242 memset(&data->cqr, 0, sizeof(data->cqr));
1243 data->cqr.cpaddr = &data->ccw;
1244 rc = dasd_eckd_read_conf_immediately(device, &data->cqr,
1245 data->rcd_buffer,
1246 lpm);
1247 if (!rc) {
1248 switch (dasd_eckd_path_access(data->rcd_buffer,
1249 DASD_ECKD_RCD_DATA_SIZE)
1250 ) {
1251 case 0x02:
1252 npm |= lpm;
1253 break;
1254 case 0x03:
1255 ppm |= lpm;
1256 break;
1257 }
1258 opm |= lpm;
1259 } else if (rc == -EOPNOTSUPP) {
1260 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1261 "path verification: No configuration "
1262 "data retrieved");
1263 opm |= lpm;
1264 } else if (rc == -EAGAIN) {
1265 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
a4d26c6a
SW		 1266 "path verification: device is stopped,"
1267 " try again later");
b206181d
SH		 1268 epm |= lpm;
1269 } else {
1270 dev_warn(&device->cdev->dev,
1271 "Reading device feature codes failed "
1272 "(rc=%d) for new path %x\n", rc, lpm);
1273 continue;
1274 }
1275 if (verify_fcx_max_data(device, lpm)) {
1276 opm &= ~lpm;
1277 npm &= ~lpm;
1278 ppm &= ~lpm;
5db8440c 1279 hpfpm |= lpm;
b206181d
SH		 1280 continue;
1281 }
1282
1283 /*
1284 * save conf_data for comparison after
1285 * rebuild_device_uid may have changed
1286 * the original data
1287 */
1288 memcpy(&path_rcd_buf, data->rcd_buffer,
1289 DASD_ECKD_RCD_DATA_SIZE);
1290 path_private.conf_data = (void *) &path_rcd_buf;
1291 path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE;
1292 if (dasd_eckd_identify_conf_parts(&path_private)) {
1293 path_private.conf_data = NULL;
1294 path_private.conf_len = 0;
1295 continue;
1296 }
1297
1298 /*
1299 * compare path UID with device UID only if at least
1300 * one valid path is left
1301 * in other case the device UID may have changed and
1302 * the first working path UID will be used as device UID
1303 */
c9346151 1304 if (dasd_path_get_opm(device) &&
b206181d
SH		 1305 dasd_eckd_compare_path_uid(device, &path_private)) {
1306 /*
1307 * the comparison was not successful
1308 * rebuild the device UID with at least one
1309 * known path in case a z/VM hyperswap command
1310 * has changed the device
1311 *
1312 * after this compare again
1313 *
1314 * if either the rebuild or the recompare fails
1315 * the path can not be used
1316 */
1317 if (rebuild_device_uid(device, data) ||
1318 dasd_eckd_compare_path_uid(
1319 device, &path_private)) {
1320 uid = &path_private.uid;
1321 if (strlen(uid->vduit) > 0)
1322 snprintf(print_uid, sizeof(print_uid),
1323 "%s.%s.%04x.%02x.%s",
1324 uid->vendor, uid->serial,
1325 uid->ssid, uid->real_unit_addr,
1326 uid->vduit);
1327 else
1328 snprintf(print_uid, sizeof(print_uid),
1329 "%s.%s.%04x.%02x",
1330 uid->vendor, uid->serial,
1331 uid->ssid,
1332 uid->real_unit_addr);
1333 dev_err(&device->cdev->dev,
1334 "The newly added channel path %02X "
1335 "will not be used because it leads "
1336 "to a different device %s\n",
1337 lpm, print_uid);
a4d26c6a
SW		 1338 opm &= ~lpm;
1339 npm &= ~lpm;
1340 ppm &= ~lpm;
5db8440c 1341 cablepm |= lpm;
b206181d 1342 continue;
a4d26c6a
SW		 1343 }
1344 }
b206181d
SH		 1345
1346 /*
1347 * There is a small chance that a path is lost again between
1348 * above path verification and the following modification of
1349 * the device opm mask. We could avoid that race here by using
1350 * yet another path mask, but we rather deal with this unlikely
1351 * situation in dasd_start_IO.
1352 */
1353 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
c9346151
SH		 1354 if (!dasd_path_get_opm(device) && opm) {
1355 dasd_path_set_opm(device, opm);
b206181d 1356 dasd_generic_path_operational(device);
5db8440c 1357 } else {
c9346151 1358 dasd_path_add_opm(device, opm);
5db8440c 1359 }
c9346151
SH		 1360 dasd_path_add_nppm(device, npm);
1361 dasd_path_add_ppm(device, ppm);
1362 dasd_path_add_tbvpm(device, epm);
1363 dasd_path_add_cablepm(device, cablepm);
1364 dasd_path_add_nohpfpm(device, hpfpm);
b206181d 1365 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
a4d26c6a 1366 }
1eb38023 1367 clear_bit(DASD_FLAG_PATH_VERIFY, &device->flags);
a4d26c6a
SW		 1368 dasd_put_device(device);
1369 if (data->isglobal)
1370 mutex_unlock(&dasd_path_verification_mutex);
1371 else
1372 kfree(data);
1373}
1374
1375static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm)
1376{
1377 struct path_verification_work_data *data;
1378
1379 data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA);
1380 if (!data) {
1381 if (mutex_trylock(&dasd_path_verification_mutex)) {
1382 data = path_verification_worker;
1383 data->isglobal = 1;
1384 } else
1385 return -ENOMEM;
1386 } else {
1387 memset(data, 0, sizeof(*data));
1388 data->isglobal = 0;
1389 }
1390 INIT_WORK(&data->worker, do_path_verification_work);
1391 dasd_get_device(device);
1392 data->device = device;
1393 data->tbvpm = lpm;
1394 schedule_work(&data->worker);
1395 return 0;
1396}
1397
a521b048
SH		 1398static void dasd_eckd_reset_path(struct dasd_device *device, __u8 pm)
1399{
1400 struct dasd_eckd_private *private = device->private;
1401 unsigned long flags;
1402
1403 if (!private->fcx_max_data)
1404 private->fcx_max_data = get_fcx_max_data(device);
1405 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
1406 dasd_path_set_tbvpm(device, pm ? : dasd_path_get_notoperpm(device));
1407 dasd_schedule_device_bh(device);
1408 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
1409}
1410
8e09f215
SW		 1411static int dasd_eckd_read_features(struct dasd_device *device)
1412{
543691a4 1413 struct dasd_eckd_private *private = device->private;
8e09f215
SW		 1414 struct dasd_psf_prssd_data *prssdp;
1415 struct dasd_rssd_features *features;
1416 struct dasd_ccw_req *cqr;
1417 struct ccw1 *ccw;
1418 int rc;
8e09f215 1419
68d1e5f0 1420 memset(&private->features, 0, sizeof(struct dasd_rssd_features));
68b781fe 1421 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
8e09f215
SW		 1422 (sizeof(struct dasd_psf_prssd_data) +
1423 sizeof(struct dasd_rssd_features)),
c5205f2f 1424 device, NULL);
8e09f215 1425 if (IS_ERR(cqr)) {
b8ed5dd5
SH		 1426 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not "
1427 "allocate initialization request");
8e09f215
SW		 1428 return PTR_ERR(cqr);
1429 }
1430 cqr->startdev = device;
1431 cqr->memdev = device;
1432 cqr->block = NULL;
eb6e199b 1433 cqr->retries = 256;
8e09f215
SW		 1434 cqr->expires = 10 * HZ;
1435
1436 /* Prepare for Read Subsystem Data */
1437 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
1438 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
1439 prssdp->order = PSF_ORDER_PRSSD;
1440 prssdp->suborder = 0x41; /* Read Feature Codes */
1441 /* all other bytes of prssdp must be zero */
1442
1443 ccw = cqr->cpaddr;
1444 ccw->cmd_code = DASD_ECKD_CCW_PSF;
1445 ccw->count = sizeof(struct dasd_psf_prssd_data);
1446 ccw->flags |= CCW_FLAG_CC;
1447 ccw->cda = (__u32)(addr_t) prssdp;
1448
1449 /* Read Subsystem Data - feature codes */
1450 features = (struct dasd_rssd_features *) (prssdp + 1);
1451 memset(features, 0, sizeof(struct dasd_rssd_features));
1452
1453 ccw++;
1454 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
1455 ccw->count = sizeof(struct dasd_rssd_features);
1456 ccw->cda = (__u32)(addr_t) features;
1457
1aae0560 1458 cqr->buildclk = get_tod_clock();
8e09f215
SW		 1459 cqr->status = DASD_CQR_FILLED;
1460 rc = dasd_sleep_on(cqr);
1461 if (rc == 0) {
1462 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
1463 features = (struct dasd_rssd_features *) (prssdp + 1);
1464 memcpy(&private->features, features,
1465 sizeof(struct dasd_rssd_features));
68d1e5f0
SW		 1466 } else
1467 dev_warn(&device->cdev->dev, "Reading device feature codes"
1468 " failed with rc=%d\n", rc);
8e09f215
SW		 1469 dasd_sfree_request(cqr, cqr->memdev);
1470 return rc;
1471}
1472
1473
40545573
HH		 1474/*
1475 * Build CP for Perform Subsystem Function - SSC.
1476 */
f3eb5384
SW		 1477static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device,
1478 int enable_pav)
40545573 1479{
8e09f215
SW		 1480 struct dasd_ccw_req *cqr;
1481 struct dasd_psf_ssc_data *psf_ssc_data;
1482 struct ccw1 *ccw;
40545573 1483
68b781fe 1484 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ ,
40545573 1485 sizeof(struct dasd_psf_ssc_data),
c5205f2f 1486 device, NULL);
40545573 1487
8e09f215 1488 if (IS_ERR(cqr)) {
fc19f381 1489 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
40545573 1490 "Could not allocate PSF-SSC request");
8e09f215
SW		 1491 return cqr;
1492 }
1493 psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data;
1494 psf_ssc_data->order = PSF_ORDER_SSC;
626350b6 1495 psf_ssc_data->suborder = 0xc0;
f3eb5384 1496 if (enable_pav) {
626350b6 1497 psf_ssc_data->suborder |= 0x08;
f3eb5384
SW		 1498 psf_ssc_data->reserved[0] = 0x88;
1499 }
8e09f215
SW		 1500 ccw = cqr->cpaddr;
1501 ccw->cmd_code = DASD_ECKD_CCW_PSF;
1502 ccw->cda = (__u32)(addr_t)psf_ssc_data;
1503 ccw->count = 66;
1504
1505 cqr->startdev = device;
1506 cqr->memdev = device;
1507 cqr->block = NULL;
eb6e199b 1508 cqr->retries = 256;
8e09f215 1509 cqr->expires = 10*HZ;
1aae0560 1510 cqr->buildclk = get_tod_clock();
8e09f215
SW		 1511 cqr->status = DASD_CQR_FILLED;
1512 return cqr;
40545573
HH		 1513}
1514
1515/*
1516 * Perform Subsystem Function.
1517 * It is necessary to trigger CIO for channel revalidation since this
1518 * call might change behaviour of DASD devices.
1519 */
1520static int
12d7b107
SH		 1521dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav,
1522 unsigned long flags)
40545573 1523{
8e09f215
SW		 1524 struct dasd_ccw_req *cqr;
1525 int rc;
1526
f3eb5384 1527 cqr = dasd_eckd_build_psf_ssc(device, enable_pav);
8e09f215
SW		 1528 if (IS_ERR(cqr))
1529 return PTR_ERR(cqr);
1530
12d7b107
SH		 1531 /*
1532 * set flags e.g. turn on failfast, to prevent blocking
1533 * the calling function should handle failed requests
1534 */
1535 cqr->flags |= flags;
1536
8e09f215
SW		 1537 rc = dasd_sleep_on(cqr);
1538 if (!rc)
1539 /* trigger CIO to reprobe devices */
1540 css_schedule_reprobe();
12d7b107
SH		 1541 else if (cqr->intrc == -EAGAIN)
1542 rc = -EAGAIN;
1543
8e09f215
SW		 1544 dasd_sfree_request(cqr, cqr->memdev);
1545 return rc;
40545573
HH		 1546}
1547
1548/*
1549 * Valide storage server of current device.
1550 */
12d7b107
SH		 1551static int dasd_eckd_validate_server(struct dasd_device *device,
1552 unsigned long flags)
40545573 1553{
543691a4
SO		 1554 struct dasd_eckd_private *private = device->private;
1555 int enable_pav, rc;
40545573 1556
f9f8d02f
SH		 1557 if (private->uid.type == UA_BASE_PAV_ALIAS ||
1558 private->uid.type == UA_HYPER_PAV_ALIAS)
12d7b107 1559 return 0;
40545573 1560 if (dasd_nopav || MACHINE_IS_VM)
f3eb5384
SW		 1561 enable_pav = 0;
1562 else
1563 enable_pav = 1;
12d7b107 1564 rc = dasd_eckd_psf_ssc(device, enable_pav, flags);
eb6e199b 1565
8e79a441
HH		 1566 /* may be requested feature is not available on server,
1567 * therefore just report error and go ahead */
b8ed5dd5
SH		 1568 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x "
1569 "returned rc=%d", private->uid.ssid, rc);
12d7b107 1570 return rc;
40545573
HH		 1571}
1572
f1633031
SH		 1573/*
1574 * worker to do a validate server in case of a lost pathgroup
1575 */
1576static void dasd_eckd_do_validate_server(struct work_struct *work)
1577{
1578 struct dasd_device *device = container_of(work, struct dasd_device,
1579 kick_validate);
ea4da6ea
SH		 1580 unsigned long flags = 0;
1581
1582 set_bit(DASD_CQR_FLAGS_FAILFAST, &flags);
1583 if (dasd_eckd_validate_server(device, flags)
12d7b107
SH		 1584 == -EAGAIN) {
1585 /* schedule worker again if failed */
1586 schedule_work(&device->kick_validate);
1587 return;
1588 }
1589
f1633031
SH		 1590 dasd_put_device(device);
1591}
1592
1593static void dasd_eckd_kick_validate_server(struct dasd_device *device)
1594{
1595 dasd_get_device(device);
25e2cf1c
SH		 1596 /* exit if device not online or in offline processing */
1597 if (test_bit(DASD_FLAG_OFFLINE, &device->flags) ||
1598 device->state < DASD_STATE_ONLINE) {
1599 dasd_put_device(device);
1600 return;
1601 }
f1633031 1602 /* queue call to do_validate_server to the kernel event daemon. */
f2608cd4
SH		 1603 if (!schedule_work(&device->kick_validate))
1604 dasd_put_device(device);
f1633031
SH		 1605}
1606
3d052595
HH		 1607/*
1608 * Check device characteristics.
1609 * If the device is accessible using ECKD discipline, the device is enabled.
1610 */
1da177e4
LT		 1611static int
1612dasd_eckd_check_characteristics(struct dasd_device *device)
1613{
543691a4 1614 struct dasd_eckd_private *private = device->private;
8e09f215 1615 struct dasd_block *block;
2dedf0d9 1616 struct dasd_uid temp_uid;
f9f8d02f 1617 int rc, i;
33b62a30 1618 int readonly;
7c8faa86 1619 unsigned long value;
1da177e4 1620
f1633031
SH		 1621 /* setup work queue for validate server*/
1622 INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server);
59a9ed5f
SH		 1623 /* setup work queue for summary unit check */
1624 INIT_WORK(&device->suc_work, dasd_alias_handle_summary_unit_check);
f1633031 1625
454e1fa1
PO		 1626 if (!ccw_device_is_pathgroup(device->cdev)) {
1627 dev_warn(&device->cdev->dev,
1628 "A channel path group could not be established\n");
1629 return -EIO;
1630 }
1631 if (!ccw_device_is_multipath(device->cdev)) {
1632 dev_info(&device->cdev->dev,
1633 "The DASD is not operating in multipath mode\n");
1634 }
92636b15
SO		 1635 if (!private) {
1636 private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA);
1637 if (!private) {
fc19f381
SH		 1638 dev_warn(&device->cdev->dev,
1639 "Allocating memory for private DASD data "
1640 "failed\n");
1da177e4
LT		 1641 return -ENOMEM;
1642 }
543691a4 1643 device->private = private;
92636b15
SO		 1644 } else {
1645 memset(private, 0, sizeof(*private));
1da177e4
LT		 1646 }
1647 /* Invalidate status of initial analysis. */
1648 private->init_cqr_status = -1;
1649 /* Set default cache operations. */
1650 private->attrib.operation = DASD_NORMAL_CACHE;
1651 private->attrib.nr_cyl = 0;
1652
40545573
HH		 1653 /* Read Configuration Data */
1654 rc = dasd_eckd_read_conf(device);
1655 if (rc)
8e09f215 1656 goto out_err1;
40545573 1657
a521b048 1658 /* set some default values */
7c8faa86 1659 device->default_expires = DASD_EXPIRES;
1f1ee9ad 1660 device->default_retries = DASD_RETRIES;
a521b048
SH		 1661 device->path_thrhld = DASD_ECKD_PATH_THRHLD;
1662 device->path_interval = DASD_ECKD_PATH_INTERVAL;
1f1ee9ad 1663
7c8faa86
SH		 1664 if (private->gneq) {
1665 value = 1;
1666 for (i = 0; i < private->gneq->timeout.value; i++)
1667 value = 10 * value;
1668 value = value * private->gneq->timeout.number;
1669 /* do not accept useless values */
1670 if (value != 0 && value <= DASD_EXPIRES_MAX)
1671 device->default_expires = value;
1672 }
1673
2dedf0d9
SH		 1674 dasd_eckd_get_uid(device, &temp_uid);
1675 if (temp_uid.type == UA_BASE_DEVICE) {
8e09f215
SW		 1676 block = dasd_alloc_block();
1677 if (IS_ERR(block)) {
b8ed5dd5
SH		 1678 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1679 "could not allocate dasd "
1680 "block structure");
8e09f215
SW		 1681 rc = PTR_ERR(block);
1682 goto out_err1;
1683 }
1684 device->block = block;
1685 block->base = device;
1686 }
1687
f9f8d02f
SH		 1688 /* register lcu with alias handling, enable PAV */
1689 rc = dasd_alias_make_device_known_to_lcu(device);
1690 if (rc)
8e09f215 1691 goto out_err2;
f9f8d02f 1692
12d7b107 1693 dasd_eckd_validate_server(device, 0);
f4ac1d02
SW		 1694
1695 /* device may report different configuration data after LCU setup */
1696 rc = dasd_eckd_read_conf(device);
1697 if (rc)
1698 goto out_err3;
8e09f215
SW		 1699
1700 /* Read Feature Codes */
68d1e5f0 1701 dasd_eckd_read_features(device);
40545573 1702
1da177e4 1703 /* Read Device Characteristics */
68b781fe
SH		 1704 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
1705 &private->rdc_data, 64);
8e09f215 1706 if (rc) {
b8ed5dd5
SH		 1707 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1708 "Read device characteristic failed, rc=%d", rc);
8e09f215
SW		 1709 goto out_err3;
1710 }
34cd551a
SH		 1711
1712 if ((device->features & DASD_FEATURE_USERAW) &&
1713 !(private->rdc_data.facilities.RT_in_LR)) {
1714 dev_err(&device->cdev->dev, "The storage server does not "
1715 "support raw-track access\n");
1716 rc = -EINVAL;
1717 goto out_err3;
1718 }
1719
817f2c84 1720 /* find the valid cylinder size */
b44b0ab3
SW		 1721 if (private->rdc_data.no_cyl == LV_COMPAT_CYL &&
1722 private->rdc_data.long_no_cyl)
1723 private->real_cyl = private->rdc_data.long_no_cyl;
1724 else
1725 private->real_cyl = private->rdc_data.no_cyl;
1726
ef19298b
SW		 1727 private->fcx_max_data = get_fcx_max_data(device);
1728
33b62a30
SW		 1729 readonly = dasd_device_is_ro(device);
1730 if (readonly)
1731 set_bit(DASD_FLAG_DEVICE_RO, &device->flags);
1732
fc19f381 1733 dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) "
33b62a30 1734 "with %d cylinders, %d heads, %d sectors%s\n",
fc19f381
SH		 1735 private->rdc_data.dev_type,
1736 private->rdc_data.dev_model,
1737 private->rdc_data.cu_type,
1738 private->rdc_data.cu_model.model,
92636b15 1739 private->real_cyl,
fc19f381 1740 private->rdc_data.trk_per_cyl,
33b62a30
SW		 1741 private->rdc_data.sec_per_trk,
1742 readonly ? ", read-only device" : "");
8e09f215
SW		 1743 return 0;
1744
1745out_err3:
1746 dasd_alias_disconnect_device_from_lcu(device);
1747out_err2:
1748 dasd_free_block(device->block);
1749 device->block = NULL;
1750out_err1:
4abb08c2 1751 kfree(private->conf_data);
8e09f215
SW		 1752 kfree(device->private);
1753 device->private = NULL;
3d052595 1754 return rc;
1da177e4
LT		 1755}
1756
8e09f215
SW		 1757static void dasd_eckd_uncheck_device(struct dasd_device *device)
1758{
543691a4 1759 struct dasd_eckd_private *private = device->private;
b179b037 1760 int i;
4abb08c2 1761
7c6553d4
SH		 1762 if (!private)
1763 return;
1764
8e09f215 1765 dasd_alias_disconnect_device_from_lcu(device);
4abb08c2
SW		 1766 private->ned = NULL;
1767 private->sneq = NULL;
1768 private->vdsneq = NULL;
1769 private->gneq = NULL;
1770 private->conf_len = 0;
b179b037 1771 for (i = 0; i < 8; i++) {
c9346151
SH		 1772 kfree(device->path[i].conf_data);
1773 if ((__u8 *)device->path[i].conf_data ==
b179b037
SH		 1774 private->conf_data) {
1775 private->conf_data = NULL;
1776 private->conf_len = 0;
1777 }
c9346151 1778 device->path[i].conf_data = NULL;
a521b048
SH		 1779 device->path[i].cssid = 0;
1780 device->path[i].ssid = 0;
1781 device->path[i].chpid = 0;
b179b037 1782 }
4abb08c2
SW		 1783 kfree(private->conf_data);
1784 private->conf_data = NULL;
8e09f215
SW		 1785}
1786
1da177e4
LT		 1787static struct dasd_ccw_req *
1788dasd_eckd_analysis_ccw(struct dasd_device *device)
1789{
543691a4 1790 struct dasd_eckd_private *private = device->private;
1da177e4
LT		 1791 struct eckd_count *count_data;
1792 struct LO_eckd_data *LO_data;
1793 struct dasd_ccw_req *cqr;
1794 struct ccw1 *ccw;
1795 int cplength, datasize;
1796 int i;
1797
1da177e4
LT		 1798 cplength = 8;
1799 datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data);
c5205f2f
SO		 1800 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device,
1801 NULL);
1da177e4
LT		 1802 if (IS_ERR(cqr))
1803 return cqr;
1804 ccw = cqr->cpaddr;
ce6915f5
JH		 1805 /* Define extent for the first 2 tracks. */
1806 define_extent(ccw++, cqr->data, 0, 1,
45f186be 1807 DASD_ECKD_CCW_READ_COUNT, device, 0);
8e09f215 1808 LO_data = cqr->data + sizeof(struct DE_eckd_data);
1da177e4
LT		 1809 /* Locate record for the first 4 records on track 0. */
1810 ccw[-1].flags |= CCW_FLAG_CC;
1811 locate_record(ccw++, LO_data++, 0, 0, 4,
1812 DASD_ECKD_CCW_READ_COUNT, device, 0);
1813
1814 count_data = private->count_area;
1815 for (i = 0; i < 4; i++) {
1816 ccw[-1].flags |= CCW_FLAG_CC;
1817 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
1818 ccw->flags = 0;
1819 ccw->count = 8;
1820 ccw->cda = (__u32)(addr_t) count_data;
1821 ccw++;
1822 count_data++;
1823 }
1824
ce6915f5 1825 /* Locate record for the first record on track 1. */
1da177e4 1826 ccw[-1].flags |= CCW_FLAG_CC;
ce6915f5 1827 locate_record(ccw++, LO_data++, 1, 0, 1,
1da177e4
LT		 1828 DASD_ECKD_CCW_READ_COUNT, device, 0);
1829 /* Read count ccw. */
1830 ccw[-1].flags |= CCW_FLAG_CC;
1831 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
1832 ccw->flags = 0;
1833 ccw->count = 8;
1834 ccw->cda = (__u32)(addr_t) count_data;
1835
8e09f215
SW		 1836 cqr->block = NULL;
1837 cqr->startdev = device;
1838 cqr->memdev = device;
eb6e199b 1839 cqr->retries = 255;
1aae0560 1840 cqr->buildclk = get_tod_clock();
1da177e4
LT		 1841 cqr->status = DASD_CQR_FILLED;
1842 return cqr;
1843}
1844
eb6e199b
SW		 1845/* differentiate between 'no record found' and any other error */
1846static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr)
1847{
1848 char *sense;
1849 if (init_cqr->status == DASD_CQR_DONE)
1850 return INIT_CQR_OK;
1851 else if (init_cqr->status == DASD_CQR_NEED_ERP ||
1852 init_cqr->status == DASD_CQR_FAILED) {
1853 sense = dasd_get_sense(&init_cqr->irb);
1854 if (sense && (sense[1] & SNS1_NO_REC_FOUND))
1855 return INIT_CQR_UNFORMATTED;
1856 else
1857 return INIT_CQR_ERROR;
1858 } else
1859 return INIT_CQR_ERROR;
1860}
1861
1da177e4
LT		 1862/*
1863 * This is the callback function for the init_analysis cqr. It saves
1864 * the status of the initial analysis ccw before it frees it and kicks
1865 * the device to continue the startup sequence. This will call
1866 * dasd_eckd_do_analysis again (if the devices has not been marked
1867 * for deletion in the meantime).
1868 */
eb6e199b
SW		 1869static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr,
1870 void *data)
1da177e4 1871{
543691a4
SO		 1872 struct dasd_device *device = init_cqr->startdev;
1873 struct dasd_eckd_private *private = device->private;
1da177e4 1874
eb6e199b 1875 private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr);
1da177e4
LT		 1876 dasd_sfree_request(init_cqr, device);
1877 dasd_kick_device(device);
1878}
1879
eb6e199b 1880static int dasd_eckd_start_analysis(struct dasd_block *block)
1da177e4 1881{
1da177e4
LT		 1882 struct dasd_ccw_req *init_cqr;
1883
8e09f215 1884 init_cqr = dasd_eckd_analysis_ccw(block->base);
1da177e4
LT		 1885 if (IS_ERR(init_cqr))
1886 return PTR_ERR(init_cqr);
1887 init_cqr->callback = dasd_eckd_analysis_callback;
1888 init_cqr->callback_data = NULL;
1889 init_cqr->expires = 5*HZ;
eb6e199b
SW		 1890 /* first try without ERP, so we can later handle unformatted
1891 * devices as special case
1892 */
1893 clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags);
1894 init_cqr->retries = 0;
1da177e4
LT		 1895 dasd_add_request_head(init_cqr);
1896 return -EAGAIN;
1897}
1898
eb6e199b 1899static int dasd_eckd_end_analysis(struct dasd_block *block)
1da177e4 1900{
543691a4
SO		 1901 struct dasd_device *device = block->base;
1902 struct dasd_eckd_private *private = device->private;
1da177e4
LT		 1903 struct eckd_count *count_area;
1904 unsigned int sb, blk_per_trk;
1905 int status, i;
eb6e199b 1906 struct dasd_ccw_req *init_cqr;
1da177e4 1907
1da177e4
LT		 1908 status = private->init_cqr_status;
1909 private->init_cqr_status = -1;
eb6e199b
SW		 1910 if (status == INIT_CQR_ERROR) {
1911 /* try again, this time with full ERP */
1912 init_cqr = dasd_eckd_analysis_ccw(device);
1913 dasd_sleep_on(init_cqr);
1914 status = dasd_eckd_analysis_evaluation(init_cqr);
1915 dasd_sfree_request(init_cqr, device);
1916 }
1917
e4dbb0f2
SH		 1918 if (device->features & DASD_FEATURE_USERAW) {
1919 block->bp_block = DASD_RAW_BLOCKSIZE;
1920 blk_per_trk = DASD_RAW_BLOCK_PER_TRACK;
1921 block->s2b_shift = 3;
1922 goto raw;
1923 }
1924
eb6e199b
SW		 1925 if (status == INIT_CQR_UNFORMATTED) {
1926 dev_warn(&device->cdev->dev, "The DASD is not formatted\n");
1da177e4 1927 return -EMEDIUMTYPE;
eb6e199b
SW		 1928 } else if (status == INIT_CQR_ERROR) {
1929 dev_err(&device->cdev->dev,
1930 "Detecting the DASD disk layout failed because "
1931 "of an I/O error\n");
1932 return -EIO;
1da177e4
LT		 1933 }
1934
1935 private->uses_cdl = 1;
1da177e4
LT		 1936 /* Check Track 0 for Compatible Disk Layout */
1937 count_area = NULL;
1938 for (i = 0; i < 3; i++) {
1939 if (private->count_area[i].kl != 4 ||
3bc9fef9
SH		 1940 private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 ||
1941 private->count_area[i].cyl != 0 ||
1942 private->count_area[i].head != count_area_head[i] ||
1943 private->count_area[i].record != count_area_rec[i]) {
1da177e4
LT		 1944 private->uses_cdl = 0;
1945 break;
1946 }
1947 }
1948 if (i == 3)
ce6915f5 1949 count_area = &private->count_area[3];
1da177e4
LT		 1950
1951 if (private->uses_cdl == 0) {
1952 for (i = 0; i < 5; i++) {
1953 if ((private->count_area[i].kl != 0) ||
1954 (private->count_area[i].dl !=
3bc9fef9
SH		 1955 private->count_area[0].dl) ||
1956 private->count_area[i].cyl != 0 ||
1957 private->count_area[i].head != count_area_head[i] ||
1958 private->count_area[i].record != count_area_rec[i])
1da177e4
LT		 1959 break;
1960 }
1961 if (i == 5)
1962 count_area = &private->count_area[0];
1963 } else {
1964 if (private->count_area[3].record == 1)
fc19f381
SH		 1965 dev_warn(&device->cdev->dev,
1966 "Track 0 has no records following the VTOC\n");
1da177e4 1967 }
e4dbb0f2 1968
1da177e4
LT		 1969 if (count_area != NULL && count_area->kl == 0) {
1970 /* we found notthing violating our disk layout */
1971 if (dasd_check_blocksize(count_area->dl) == 0)
8e09f215 1972 block->bp_block = count_area->dl;
1da177e4 1973 }
8e09f215 1974 if (block->bp_block == 0) {
fc19f381
SH		 1975 dev_warn(&device->cdev->dev,
1976 "The disk layout of the DASD is not supported\n");
1da177e4
LT		 1977 return -EMEDIUMTYPE;
1978 }
8e09f215
SW		 1979 block->s2b_shift = 0; /* bits to shift 512 to get a block */
1980 for (sb = 512; sb < block->bp_block; sb = sb << 1)
1981 block->s2b_shift++;
1da177e4 1982
8e09f215 1983 blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block);
e4dbb0f2
SH		 1984
1985raw:
2cc9637c 1986 block->blocks = ((unsigned long) private->real_cyl *
1da177e4
LT		 1987 private->rdc_data.trk_per_cyl *
1988 blk_per_trk);
1989
fc19f381 1990 dev_info(&device->cdev->dev,
2cc9637c 1991 "DASD with %u KB/block, %lu KB total size, %u KB/track, "
fc19f381 1992 "%s\n", (block->bp_block >> 10),
2cc9637c 1993 (((unsigned long) private->real_cyl *
fc19f381
SH		 1994 private->rdc_data.trk_per_cyl *
1995 blk_per_trk * (block->bp_block >> 9)) >> 1),
1996 ((blk_per_trk * block->bp_block) >> 10),
1997 private->uses_cdl ?
1998 "compatible disk layout" : "linux disk layout");
1da177e4
LT		 1999
2000 return 0;
2001}
2002
8e09f215 2003static int dasd_eckd_do_analysis(struct dasd_block *block)
1da177e4 2004{
543691a4 2005 struct dasd_eckd_private *private = block->base->private;
1da177e4 2006
1da177e4 2007 if (private->init_cqr_status < 0)
8e09f215 2008 return dasd_eckd_start_analysis(block);
1da177e4 2009 else
8e09f215 2010 return dasd_eckd_end_analysis(block);
1da177e4
LT		 2011}
2012
d42e1712 2013static int dasd_eckd_basic_to_ready(struct dasd_device *device)
8e09f215
SW		 2014{
2015 return dasd_alias_add_device(device);
2016};
2017
2018static int dasd_eckd_online_to_ready(struct dasd_device *device)
2019{
669f3765
SH		 2020 if (cancel_work_sync(&device->reload_device))
2021 dasd_put_device(device);
2022 if (cancel_work_sync(&device->kick_validate))
2023 dasd_put_device(device);
2024
d42e1712
SH		 2025 return 0;
2026};
2027
daa991bf 2028static int dasd_eckd_basic_to_known(struct dasd_device *device)
d42e1712 2029{
8e09f215
SW		 2030 return dasd_alias_remove_device(device);
2031};
2032
1da177e4 2033static int
8e09f215 2034dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo)
1da177e4 2035{
543691a4 2036 struct dasd_eckd_private *private = block->base->private;
1da177e4 2037
8e09f215 2038 if (dasd_check_blocksize(block->bp_block) == 0) {
1da177e4 2039 geo->sectors = recs_per_track(&private->rdc_data,
8e09f215 2040 0, block->bp_block);
1da177e4
LT		 2041 }
2042 geo->cylinders = private->rdc_data.no_cyl;
2043 geo->heads = private->rdc_data.trk_per_cyl;
2044 return 0;
2045}
2046
8fd57520
JH		 2047/*
2048 * Build the TCW request for the format check
2049 */
2050static struct dasd_ccw_req *
2051dasd_eckd_build_check_tcw(struct dasd_device *base, struct format_data_t *fdata,
2052 int enable_pav, struct eckd_count *fmt_buffer,
2053 int rpt)
2054{
2055 struct dasd_eckd_private *start_priv;
2056 struct dasd_device *startdev = NULL;
2057 struct tidaw *last_tidaw = NULL;
2058 struct dasd_ccw_req *cqr;
2059 struct itcw *itcw;
2060 int itcw_size;
2061 int count;
2062 int rc;
2063 int i;
2064
2065 if (enable_pav)
2066 startdev = dasd_alias_get_start_dev(base);
2067
2068 if (!startdev)
2069 startdev = base;
2070
2071 start_priv = startdev->private;
2072
2073 count = rpt * (fdata->stop_unit - fdata->start_unit + 1);
2074
2075 /*
2076 * we're adding 'count' amount of tidaw to the itcw.
2077 * calculate the corresponding itcw_size
2078 */
2079 itcw_size = itcw_calc_size(0, count, 0);
2080
c5205f2f
SO		 2081 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev,
2082 NULL);
8fd57520
JH		 2083 if (IS_ERR(cqr))
2084 return cqr;
2085
2086 start_priv->count++;
2087
2088 itcw = itcw_init(cqr->data, itcw_size, ITCW_OP_READ, 0, count, 0);
2089 if (IS_ERR(itcw)) {
2090 rc = -EINVAL;
2091 goto out_err;
2092 }
2093
2094 cqr->cpaddr = itcw_get_tcw(itcw);
2095 rc = prepare_itcw(itcw, fdata->start_unit, fdata->stop_unit,
2096 DASD_ECKD_CCW_READ_COUNT_MT, base, startdev, 0, count,
2097 sizeof(struct eckd_count),
2098 count * sizeof(struct eckd_count), 0, rpt);
2099 if (rc)
2100 goto out_err;
2101
2102 for (i = 0; i < count; i++) {
2103 last_tidaw = itcw_add_tidaw(itcw, 0, fmt_buffer++,
2104 sizeof(struct eckd_count));
2105 if (IS_ERR(last_tidaw)) {
2106 rc = -EINVAL;
2107 goto out_err;
2108 }
2109 }
2110
2111 last_tidaw->flags |= TIDAW_FLAGS_LAST;
2112 itcw_finalize(itcw);
2113
2114 cqr->cpmode = 1;
2115 cqr->startdev = startdev;
2116 cqr->memdev = startdev;
2117 cqr->basedev = base;
2118 cqr->retries = startdev->default_retries;
2119 cqr->expires = startdev->default_expires * HZ;
2120 cqr->buildclk = get_tod_clock();
2121 cqr->status = DASD_CQR_FILLED;
2122 /* Set flags to suppress output for expected errors */
2123 set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags);
2124 set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags);
2125
2126 return cqr;
2127
2128out_err:
2129 dasd_sfree_request(cqr, startdev);
2130
2131 return ERR_PTR(rc);
2132}
2133
2134/*
2135 * Build the CCW request for the format check
2136 */
2137static struct dasd_ccw_req *
2138dasd_eckd_build_check(struct dasd_device *base, struct format_data_t *fdata,
2139 int enable_pav, struct eckd_count *fmt_buffer, int rpt)
2140{
2141 struct dasd_eckd_private *start_priv;
2142 struct dasd_eckd_private *base_priv;
2143 struct dasd_device *startdev = NULL;
2144 struct dasd_ccw_req *cqr;
2145 struct ccw1 *ccw;
2146 void *data;
2147 int cplength, datasize;
2148 int use_prefix;
2149 int count;
2150 int i;
2151
2152 if (enable_pav)
2153 startdev = dasd_alias_get_start_dev(base);
2154
2155 if (!startdev)
2156 startdev = base;
2157
2158 start_priv = startdev->private;
2159 base_priv = base->private;
2160
2161 count = rpt * (fdata->stop_unit - fdata->start_unit + 1);
2162
2163 use_prefix = base_priv->features.feature[8] & 0x01;
2164
2165 if (use_prefix) {
2166 cplength = 1;
2167 datasize = sizeof(struct PFX_eckd_data);
2168 } else {
2169 cplength = 2;
2170 datasize = sizeof(struct DE_eckd_data) +
2171 sizeof(struct LO_eckd_data);
2172 }
2173 cplength += count;
2174
2175 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
c5205f2f 2176 startdev, NULL);
8fd57520
JH		 2177 if (IS_ERR(cqr))
2178 return cqr;
2179
2180 start_priv->count++;
2181 data = cqr->data;
2182 ccw = cqr->cpaddr;
2183
2184 if (use_prefix) {
2185 prefix_LRE(ccw++, data, fdata->start_unit, fdata->stop_unit,
2186 DASD_ECKD_CCW_READ_COUNT, base, startdev, 1, 0,
2187 count, 0, 0);
2188 } else {
2189 define_extent(ccw++, data, fdata->start_unit, fdata->stop_unit,
45f186be 2190 DASD_ECKD_CCW_READ_COUNT, startdev, 0);
8fd57520
JH		 2191
2192 data += sizeof(struct DE_eckd_data);
2193 ccw[-1].flags |= CCW_FLAG_CC;
2194
2195 locate_record(ccw++, data, fdata->start_unit, 0, count,
2196 DASD_ECKD_CCW_READ_COUNT, base, 0);
2197 }
2198
2199 for (i = 0; i < count; i++) {
2200 ccw[-1].flags |= CCW_FLAG_CC;
2201 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
2202 ccw->flags = CCW_FLAG_SLI;
2203 ccw->count = 8;
2204 ccw->cda = (__u32)(addr_t) fmt_buffer;
2205 ccw++;
2206 fmt_buffer++;
2207 }
2208
2209 cqr->startdev = startdev;
2210 cqr->memdev = startdev;
2211 cqr->basedev = base;
2212 cqr->retries = DASD_RETRIES;
2213 cqr->expires = startdev->default_expires * HZ;
2214 cqr->buildclk = get_tod_clock();
2215 cqr->status = DASD_CQR_FILLED;
2216 /* Set flags to suppress output for expected errors */
2217 set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags);
2218
2219 return cqr;
2220}
2221
1da177e4 2222static struct dasd_ccw_req *
d42e1712 2223dasd_eckd_build_format(struct dasd_device *base,
29b8dd9d 2224 struct format_data_t *fdata,
a94fa154 2225 int enable_pav)
1da177e4 2226{
d42e1712
SH		 2227 struct dasd_eckd_private *base_priv;
2228 struct dasd_eckd_private *start_priv;
29b8dd9d 2229 struct dasd_device *startdev = NULL;
1da177e4
LT		 2230 struct dasd_ccw_req *fcp;
2231 struct eckd_count *ect;
d42e1712 2232 struct ch_t address;
1da177e4
LT		 2233 struct ccw1 *ccw;
2234 void *data;
b44b0ab3 2235 int rpt;
1da177e4 2236 int cplength, datasize;
d42e1712 2237 int i, j;
f9a28f7b
JBJ		 2238 int intensity = 0;
2239 int r0_perm;
d42e1712 2240 int nr_tracks;
18d6624e 2241 int use_prefix;
1da177e4 2242
a94fa154 2243 if (enable_pav)
29b8dd9d
SH		 2244 startdev = dasd_alias_get_start_dev(base);
2245
d42e1712
SH		 2246 if (!startdev)
2247 startdev = base;
1da177e4 2248
543691a4
SO		 2249 start_priv = startdev->private;
2250 base_priv = base->private;
d42e1712
SH		 2251
2252 rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize);
2253
2254 nr_tracks = fdata->stop_unit - fdata->start_unit + 1;
1da177e4
LT		 2255
2256 /*
2257 * fdata->intensity is a bit string that tells us what to do:
2258 * Bit 0: write record zero
2259 * Bit 1: write home address, currently not supported
2260 * Bit 2: invalidate tracks
2261 * Bit 3: use OS/390 compatible disk layout (cdl)
f9a28f7b 2262 * Bit 4: do not allow storage subsystem to modify record zero
1da177e4
LT		 2263 * Only some bit combinations do make sense.
2264 */
f9a28f7b
JBJ		 2265 if (fdata->intensity & 0x10) {
2266 r0_perm = 0;
2267 intensity = fdata->intensity & ~0x10;
2268 } else {
2269 r0_perm = 1;
2270 intensity = fdata->intensity;
2271 }
d42e1712 2272
18d6624e
SH		 2273 use_prefix = base_priv->features.feature[8] & 0x01;
2274
f9a28f7b 2275 switch (intensity) {
1da177e4
LT		 2276 case 0x00: /* Normal format */
2277 case 0x08: /* Normal format, use cdl. */
d42e1712 2278 cplength = 2 + (rpt*nr_tracks);
18d6624e
SH		 2279 if (use_prefix)
2280 datasize = sizeof(struct PFX_eckd_data) +
2281 sizeof(struct LO_eckd_data) +
2282 rpt * nr_tracks * sizeof(struct eckd_count);
2283 else
2284 datasize = sizeof(struct DE_eckd_data) +
2285 sizeof(struct LO_eckd_data) +
2286 rpt * nr_tracks * sizeof(struct eckd_count);
1da177e4
LT		 2287 break;
2288 case 0x01: /* Write record zero and format track. */
2289 case 0x09: /* Write record zero and format track, use cdl. */
d42e1712 2290 cplength = 2 + rpt * nr_tracks;
18d6624e
SH		 2291 if (use_prefix)
2292 datasize = sizeof(struct PFX_eckd_data) +
2293 sizeof(struct LO_eckd_data) +
2294 sizeof(struct eckd_count) +
2295 rpt * nr_tracks * sizeof(struct eckd_count);
2296 else
2297 datasize = sizeof(struct DE_eckd_data) +
2298 sizeof(struct LO_eckd_data) +
2299 sizeof(struct eckd_count) +
2300 rpt * nr_tracks * sizeof(struct eckd_count);
1da177e4
LT		 2301 break;
2302 case 0x04: /* Invalidate track. */
2303 case 0x0c: /* Invalidate track, use cdl. */
2304 cplength = 3;
18d6624e
SH		 2305 if (use_prefix)
2306 datasize = sizeof(struct PFX_eckd_data) +
2307 sizeof(struct LO_eckd_data) +
2308 sizeof(struct eckd_count);
2309 else
2310 datasize = sizeof(struct DE_eckd_data) +
2311 sizeof(struct LO_eckd_data) +
2312 sizeof(struct eckd_count);
1da177e4
LT		 2313 break;
2314 default:
d42e1712
SH		 2315 dev_warn(&startdev->cdev->dev,
2316 "An I/O control call used incorrect flags 0x%x\n",
2317 fdata->intensity);
1da177e4
LT		 2318 return ERR_PTR(-EINVAL);
2319 }
2320 /* Allocate the format ccw request. */
d42e1712 2321 fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength,
c5205f2f 2322 datasize, startdev, NULL);
1da177e4
LT		 2323 if (IS_ERR(fcp))
2324 return fcp;
2325
d42e1712 2326 start_priv->count++;
1da177e4
LT		 2327 data = fcp->data;
2328 ccw = fcp->cpaddr;
2329
f9a28f7b 2330 switch (intensity & ~0x08) {
1da177e4 2331 case 0x00: /* Normal format. */
18d6624e
SH		 2332 if (use_prefix) {
2333 prefix(ccw++, (struct PFX_eckd_data *) data,
2334 fdata->start_unit, fdata->stop_unit,
2335 DASD_ECKD_CCW_WRITE_CKD, base, startdev);
2336 /* grant subsystem permission to format R0 */
2337 if (r0_perm)
2338 ((struct PFX_eckd_data *)data)
2339 ->define_extent.ga_extended |= 0x04;
2340 data += sizeof(struct PFX_eckd_data);
2341 } else {
2342 define_extent(ccw++, (struct DE_eckd_data *) data,
2343 fdata->start_unit, fdata->stop_unit,
45f186be 2344 DASD_ECKD_CCW_WRITE_CKD, startdev, 0);
18d6624e
SH		 2345 /* grant subsystem permission to format R0 */
2346 if (r0_perm)
2347 ((struct DE_eckd_data *) data)
2348 ->ga_extended |= 0x04;
2349 data += sizeof(struct DE_eckd_data);
2350 }
1da177e4
LT		 2351 ccw[-1].flags |= CCW_FLAG_CC;
2352 locate_record(ccw++, (struct LO_eckd_data *) data,
d42e1712
SH		 2353 fdata->start_unit, 0, rpt*nr_tracks,
2354 DASD_ECKD_CCW_WRITE_CKD, base,
1da177e4
LT		 2355 fdata->blksize);
2356 data += sizeof(struct LO_eckd_data);
2357 break;
2358 case 0x01: /* Write record zero + format track. */
18d6624e
SH		 2359 if (use_prefix) {
2360 prefix(ccw++, (struct PFX_eckd_data *) data,
2361 fdata->start_unit, fdata->stop_unit,
2362 DASD_ECKD_CCW_WRITE_RECORD_ZERO,
2363 base, startdev);
2364 data += sizeof(struct PFX_eckd_data);
2365 } else {
2366 define_extent(ccw++, (struct DE_eckd_data *) data,
2367 fdata->start_unit, fdata->stop_unit,
45f186be 2368 DASD_ECKD_CCW_WRITE_RECORD_ZERO, startdev, 0);
18d6624e
SH		 2369 data += sizeof(struct DE_eckd_data);
2370 }
1da177e4
LT		 2371 ccw[-1].flags |= CCW_FLAG_CC;
2372 locate_record(ccw++, (struct LO_eckd_data *) data,
d42e1712
SH		 2373 fdata->start_unit, 0, rpt * nr_tracks + 1,
2374 DASD_ECKD_CCW_WRITE_RECORD_ZERO, base,
2375 base->block->bp_block);
1da177e4
LT		 2376 data += sizeof(struct LO_eckd_data);
2377 break;
2378 case 0x04: /* Invalidate track. */
18d6624e
SH		 2379 if (use_prefix) {
2380 prefix(ccw++, (struct PFX_eckd_data *) data,
2381 fdata->start_unit, fdata->stop_unit,
2382 DASD_ECKD_CCW_WRITE_CKD, base, startdev);
2383 data += sizeof(struct PFX_eckd_data);
2384 } else {
2385 define_extent(ccw++, (struct DE_eckd_data *) data,
2386 fdata->start_unit, fdata->stop_unit,
45f186be 2387 DASD_ECKD_CCW_WRITE_CKD, startdev, 0);
18d6624e
SH		 2388 data += sizeof(struct DE_eckd_data);
2389 }
1da177e4
LT		 2390 ccw[-1].flags |= CCW_FLAG_CC;
2391 locate_record(ccw++, (struct LO_eckd_data *) data,
2392 fdata->start_unit, 0, 1,
d42e1712 2393 DASD_ECKD_CCW_WRITE_CKD, base, 8);
1da177e4
LT		 2394 data += sizeof(struct LO_eckd_data);
2395 break;
2396 }
d42e1712
SH		 2397
2398 for (j = 0; j < nr_tracks; j++) {
2399 /* calculate cylinder and head for the current track */
2400 set_ch_t(&address,
2401 (fdata->start_unit + j) /
2402 base_priv->rdc_data.trk_per_cyl,
2403 (fdata->start_unit + j) %
2404 base_priv->rdc_data.trk_per_cyl);
2405 if (intensity & 0x01) { /* write record zero */
1da177e4
LT		 2406 ect = (struct eckd_count *) data;
2407 data += sizeof(struct eckd_count);
b44b0ab3
SW		 2408 ect->cyl = address.cyl;
2409 ect->head = address.head;
d42e1712 2410 ect->record = 0;
1da177e4 2411 ect->kl = 0;
d42e1712 2412 ect->dl = 8;
1da177e4 2413 ccw[-1].flags |= CCW_FLAG_CC;
d42e1712 2414 ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO;
1da177e4
LT		 2415 ccw->flags = CCW_FLAG_SLI;
2416 ccw->count = 8;
2417 ccw->cda = (__u32)(addr_t) ect;
2418 ccw++;
2419 }
d42e1712
SH		 2420 if ((intensity & ~0x08) & 0x04) { /* erase track */
2421 ect = (struct eckd_count *) data;
2422 data += sizeof(struct eckd_count);
2423 ect->cyl = address.cyl;
2424 ect->head = address.head;
2425 ect->record = 1;
2426 ect->kl = 0;
2427 ect->dl = 0;
2428 ccw[-1].flags |= CCW_FLAG_CC;
2429 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD;
2430 ccw->flags = CCW_FLAG_SLI;
2431 ccw->count = 8;
2432 ccw->cda = (__u32)(addr_t) ect;
2433 } else { /* write remaining records */
2434 for (i = 0; i < rpt; i++) {
2435 ect = (struct eckd_count *) data;
2436 data += sizeof(struct eckd_count);
2437 ect->cyl = address.cyl;
2438 ect->head = address.head;
2439 ect->record = i + 1;
2440 ect->kl = 0;
2441 ect->dl = fdata->blksize;
2442 /*
2443 * Check for special tracks 0-1
2444 * when formatting CDL
2445 */
2446 if ((intensity & 0x08) &&
46d1c03c 2447 address.cyl == 0 && address.head == 0) {
d42e1712
SH		 2448 if (i < 3) {
2449 ect->kl = 4;
2450 ect->dl = sizes_trk0[i] - 4;
2451 }
2452 }
2453 if ((intensity & 0x08) &&
46d1c03c 2454 address.cyl == 0 && address.head == 1) {
d42e1712
SH		 2455 ect->kl = 44;
2456 ect->dl = LABEL_SIZE - 44;
2457 }
2458 ccw[-1].flags |= CCW_FLAG_CC;
2459 if (i != 0 || j == 0)
2460 ccw->cmd_code =
2461 DASD_ECKD_CCW_WRITE_CKD;
2462 else
2463 ccw->cmd_code =
2464 DASD_ECKD_CCW_WRITE_CKD_MT;
2465 ccw->flags = CCW_FLAG_SLI;
2466 ccw->count = 8;
ba21d0ea
SH		 2467 ccw->cda = (__u32)(addr_t) ect;
2468 ccw++;
d42e1712
SH		 2469 }
2470 }
1da177e4 2471 }
d42e1712
SH		 2472
2473 fcp->startdev = startdev;
2474 fcp->memdev = startdev;
29b8dd9d 2475 fcp->basedev = base;
eb6e199b 2476 fcp->retries = 256;
d42e1712 2477 fcp->expires = startdev->default_expires * HZ;
1aae0560 2478 fcp->buildclk = get_tod_clock();
1da177e4 2479 fcp->status = DASD_CQR_FILLED;
d42e1712 2480
1da177e4
LT		 2481 return fcp;
2482}
2483
570d237c
JH		 2484/*
2485 * Wrapper function to build a CCW request depending on input data
2486 */
2487static struct dasd_ccw_req *
2488dasd_eckd_format_build_ccw_req(struct dasd_device *base,
8fd57520
JH		 2489 struct format_data_t *fdata, int enable_pav,
2490 int tpm, struct eckd_count *fmt_buffer, int rpt)
570d237c 2491{
8fd57520
JH		 2492 struct dasd_ccw_req *ccw_req;
2493
2494 if (!fmt_buffer) {
2495 ccw_req = dasd_eckd_build_format(base, fdata, enable_pav);
2496 } else {
2497 if (tpm)
2498 ccw_req = dasd_eckd_build_check_tcw(base, fdata,
2499 enable_pav,
2500 fmt_buffer, rpt);
2501 else
2502 ccw_req = dasd_eckd_build_check(base, fdata, enable_pav,
2503 fmt_buffer, rpt);
2504 }
2505
2506 return ccw_req;
570d237c
JH		 2507}
2508
2509/*
2510 * Sanity checks on format_data
2511 */
2512static int dasd_eckd_format_sanity_checks(struct dasd_device *base,
2513 struct format_data_t *fdata)
d42e1712 2514{
543691a4 2515 struct dasd_eckd_private *private = base->private;
d42e1712 2516
d42e1712
SH		 2517 if (fdata->start_unit >=
2518 (private->real_cyl * private->rdc_data.trk_per_cyl)) {
2519 dev_warn(&base->cdev->dev,
2520 "Start track number %u used in formatting is too big\n",
2521 fdata->start_unit);
2522 return -EINVAL;
2523 }
2524 if (fdata->stop_unit >=
2525 (private->real_cyl * private->rdc_data.trk_per_cyl)) {
2526 dev_warn(&base->cdev->dev,
2527 "Stop track number %u used in formatting is too big\n",
2528 fdata->stop_unit);
2529 return -EINVAL;
2530 }
2531 if (fdata->start_unit > fdata->stop_unit) {
2532 dev_warn(&base->cdev->dev,
2533 "Start track %u used in formatting exceeds end track\n",
2534 fdata->start_unit);
2535 return -EINVAL;
2536 }
2537 if (dasd_check_blocksize(fdata->blksize) != 0) {
2538 dev_warn(&base->cdev->dev,
2539 "The DASD cannot be formatted with block size %u\n",
2540 fdata->blksize);
2541 return -EINVAL;
2542 }
570d237c
JH		 2543 return 0;
2544}
2545
2546/*
2547 * This function will process format_data originally coming from an IOCTL
2548 */
2549static int dasd_eckd_format_process_data(struct dasd_device *base,
2550 struct format_data_t *fdata,
8fd57520
JH		 2551 int enable_pav, int tpm,
2552 struct eckd_count *fmt_buffer, int rpt,
2553 struct irb *irb)
570d237c 2554{
543691a4 2555 struct dasd_eckd_private *private = base->private;
570d237c 2556 struct dasd_ccw_req *cqr, *n;
570d237c
JH		 2557 struct list_head format_queue;
2558 struct dasd_device *device;
8fd57520 2559 char *sense = NULL;
570d237c
JH		 2560 int old_start, old_stop, format_step;
2561 int step, retry;
2562 int rc;
2563
570d237c
JH		 2564 rc = dasd_eckd_format_sanity_checks(base, fdata);
2565 if (rc)
2566 return rc;
d42e1712
SH		 2567
2568 INIT_LIST_HEAD(&format_queue);
d42e1712 2569
46d1c03c 2570 old_start = fdata->start_unit;
29b8dd9d 2571 old_stop = fdata->stop_unit;
d42e1712 2572
8fd57520
JH		 2573 if (!tpm && fmt_buffer != NULL) {
2574 /* Command Mode / Format Check */
2575 format_step = 1;
2576 } else if (tpm && fmt_buffer != NULL) {
2577 /* Transport Mode / Format Check */
2578 format_step = DASD_CQR_MAX_CCW / rpt;
2579 } else {
2580 /* Normal Formatting */
2581 format_step = DASD_CQR_MAX_CCW /
2582 recs_per_track(&private->rdc_data, 0, fdata->blksize);
2583 }
2584
46d1c03c
JH		 2585 do {
2586 retry = 0;
2587 while (fdata->start_unit <= old_stop) {
2588 step = fdata->stop_unit - fdata->start_unit + 1;
2589 if (step > format_step) {
2590 fdata->stop_unit =
2591 fdata->start_unit + format_step - 1;
2592 }
d42e1712 2593
570d237c 2594 cqr = dasd_eckd_format_build_ccw_req(base, fdata,
8fd57520
JH		 2595 enable_pav, tpm,
2596 fmt_buffer, rpt);
46d1c03c
JH		 2597 if (IS_ERR(cqr)) {
2598 rc = PTR_ERR(cqr);
2599 if (rc == -ENOMEM) {
2600 if (list_empty(&format_queue))
2601 goto out;
2602 /*
2603 * not enough memory available, start
2604 * requests retry after first requests
2605 * were finished
2606 */
2607 retry = 1;
2608 break;
2609 }
2610 goto out_err;
2611 }
2612 list_add_tail(&cqr->blocklist, &format_queue);
d42e1712 2613
8fd57520
JH		 2614 if (fmt_buffer) {
2615 step = fdata->stop_unit - fdata->start_unit + 1;
2616 fmt_buffer += rpt * step;
2617 }
46d1c03c
JH		 2618 fdata->start_unit = fdata->stop_unit + 1;
2619 fdata->stop_unit = old_stop;
d42e1712 2620 }
d42e1712 2621
46d1c03c
JH		 2622 rc = dasd_sleep_on_queue(&format_queue);
2623
2624out_err:
2625 list_for_each_entry_safe(cqr, n, &format_queue, blocklist) {
2626 device = cqr->startdev;
543691a4 2627 private = device->private;
8fd57520
JH		 2628
2629 if (cqr->status == DASD_CQR_FAILED) {
2630 /*
2631 * Only get sense data if called by format
2632 * check
2633 */
2634 if (fmt_buffer && irb) {
2635 sense = dasd_get_sense(&cqr->irb);
2636 memcpy(irb, &cqr->irb, sizeof(*irb));
2637 }
46d1c03c 2638 rc = -EIO;
8fd57520 2639 }
46d1c03c
JH		 2640 list_del_init(&cqr->blocklist);
2641 dasd_sfree_request(cqr, device);
2642 private->count--;
2643 }
d42e1712 2644
8fd57520 2645 if (rc && rc != -EIO)
46d1c03c 2646 goto out;
8fd57520
JH		 2647 if (rc == -EIO) {
2648 /*
2649 * In case fewer than the expected records are on the
2650 * track, we will most likely get a 'No Record Found'
2651 * error (in command mode) or a 'File Protected' error
2652 * (in transport mode). Those particular cases shouldn't
2653 * pass the -EIO to the IOCTL, therefore reset the rc
2654 * and continue.
2655 */
2656 if (sense &&
2657 (sense[1] & SNS1_NO_REC_FOUND ||
2658 sense[1] & SNS1_FILE_PROTECTED))
2659 retry = 1;
2660 else
2661 goto out;
2662 }
d42e1712 2663
46d1c03c 2664 } while (retry);
29b8dd9d 2665
46d1c03c
JH		 2666out:
2667 fdata->start_unit = old_start;
2668 fdata->stop_unit = old_stop;
d42e1712
SH		 2669
2670 return rc;
2671}
2672
570d237c
JH		 2673static int dasd_eckd_format_device(struct dasd_device *base,
2674 struct format_data_t *fdata, int enable_pav)
2675{
8fd57520
JH		 2676 return dasd_eckd_format_process_data(base, fdata, enable_pav, 0, NULL,
2677 0, NULL);
2678}
2679
2680/*
2681 * Helper function to count consecutive records of a single track.
2682 */
2683static int dasd_eckd_count_records(struct eckd_count *fmt_buffer, int start,
2684 int max)
2685{
2686 int head;
2687 int i;
2688
2689 head = fmt_buffer[start].head;
2690
2691 /*
2692 * There are 3 conditions where we stop counting:
2693 * - if data reoccurs (same head and record may reoccur), which may
2694 * happen due to the way DASD_ECKD_CCW_READ_COUNT works
2695 * - when the head changes, because we're iterating over several tracks
2696 * then (DASD_ECKD_CCW_READ_COUNT_MT)
2697 * - when we've reached the end of sensible data in the buffer (the
2698 * record will be 0 then)
2699 */
2700 for (i = start; i < max; i++) {
2701 if (i > start) {
2702 if ((fmt_buffer[i].head == head &&
2703 fmt_buffer[i].record == 1) ||
2704 fmt_buffer[i].head != head ||
2705 fmt_buffer[i].record == 0)
2706 break;
2707 }
2708 }
2709
2710 return i - start;
2711}
2712
2713/*
2714 * Evaluate a given range of tracks. Data like number of records, blocksize,
2715 * record ids, and key length are compared with expected data.
2716 *
2717 * If a mismatch occurs, the corresponding error bit is set, as well as
2718 * additional information, depending on the error.
2719 */
2720static void dasd_eckd_format_evaluate_tracks(struct eckd_count *fmt_buffer,
2721 struct format_check_t *cdata,
2722 int rpt_max, int rpt_exp,
2723 int trk_per_cyl, int tpm)
2724{
2725 struct ch_t geo;
2726 int max_entries;
2727 int count = 0;
2728 int trkcount;
2729 int blksize;
2730 int pos = 0;
2731 int i, j;
2732 int kl;
2733
2734 trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1;
2735 max_entries = trkcount * rpt_max;
2736
2737 for (i = cdata->expect.start_unit; i <= cdata->expect.stop_unit; i++) {
2738 /* Calculate the correct next starting position in the buffer */
2739 if (tpm) {
2740 while (fmt_buffer[pos].record == 0 &&
2741 fmt_buffer[pos].dl == 0) {
2742 if (pos++ > max_entries)
2743 break;
2744 }
2745 } else {
2746 if (i != cdata->expect.start_unit)
2747 pos += rpt_max - count;
2748 }
2749
2750 /* Calculate the expected geo values for the current track */
2751 set_ch_t(&geo, i / trk_per_cyl, i % trk_per_cyl);
2752
2753 /* Count and check number of records */
2754 count = dasd_eckd_count_records(fmt_buffer, pos, pos + rpt_max);
2755
2756 if (count < rpt_exp) {
2757 cdata->result = DASD_FMT_ERR_TOO_FEW_RECORDS;
2758 break;
2759 }
2760 if (count > rpt_exp) {
2761 cdata->result = DASD_FMT_ERR_TOO_MANY_RECORDS;
2762 break;
2763 }
2764
2765 for (j = 0; j < count; j++, pos++) {
2766 blksize = cdata->expect.blksize;
2767 kl = 0;
2768
2769 /*
2770 * Set special values when checking CDL formatted
2771 * devices.
2772 */
2773 if ((cdata->expect.intensity & 0x08) &&
2774 geo.cyl == 0 && geo.head == 0) {
2775 if (j < 3) {
2776 blksize = sizes_trk0[j] - 4;
2777 kl = 4;
2778 }
2779 }
2780 if ((cdata->expect.intensity & 0x08) &&
2781 geo.cyl == 0 && geo.head == 1) {
2782 blksize = LABEL_SIZE - 44;
2783 kl = 44;
2784 }
2785
2786 /* Check blocksize */
2787 if (fmt_buffer[pos].dl != blksize) {
2788 cdata->result = DASD_FMT_ERR_BLKSIZE;
2789 goto out;
2790 }
2791 /* Check if key length is 0 */
2792 if (fmt_buffer[pos].kl != kl) {
2793 cdata->result = DASD_FMT_ERR_KEY_LENGTH;
2794 goto out;
2795 }
2796 /* Check if record_id is correct */
2797 if (fmt_buffer[pos].cyl != geo.cyl ||
2798 fmt_buffer[pos].head != geo.head ||
2799 fmt_buffer[pos].record != (j + 1)) {
2800 cdata->result = DASD_FMT_ERR_RECORD_ID;
2801 goto out;
2802 }
2803 }
2804 }
2805
2806out:
2807 /*
2808 * In case of no errors, we need to decrease by one
2809 * to get the correct positions.
2810 */
2811 if (!cdata->result) {
2812 i--;
2813 pos--;
2814 }
2815
2816 cdata->unit = i;
2817 cdata->num_records = count;
2818 cdata->rec = fmt_buffer[pos].record;
2819 cdata->blksize = fmt_buffer[pos].dl;
2820 cdata->key_length = fmt_buffer[pos].kl;
2821}
2822
2823/*
2824 * Check the format of a range of tracks of a DASD.
2825 */
2826static int dasd_eckd_check_device_format(struct dasd_device *base,
2827 struct format_check_t *cdata,
2828 int enable_pav)
2829{
2830 struct dasd_eckd_private *private = base->private;
2831 struct eckd_count *fmt_buffer;
2832 struct irb irb;
2833 int rpt_max, rpt_exp;
2834 int fmt_buffer_size;
2835 int trk_per_cyl;
2836 int trkcount;
2837 int tpm = 0;
2838 int rc;
2839
2840 trk_per_cyl = private->rdc_data.trk_per_cyl;
2841
2842 /* Get maximum and expected amount of records per track */
2843 rpt_max = recs_per_track(&private->rdc_data, 0, 512) + 1;
2844 rpt_exp = recs_per_track(&private->rdc_data, 0, cdata->expect.blksize);
2845
2846 trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1;
2847 fmt_buffer_size = trkcount * rpt_max * sizeof(struct eckd_count);
2848
2849 fmt_buffer = kzalloc(fmt_buffer_size, GFP_KERNEL | GFP_DMA);
2850 if (!fmt_buffer)
2851 return -ENOMEM;
2852
2853 /*
2854 * A certain FICON feature subset is needed to operate in transport
2855 * mode. Additionally, the support for transport mode is implicitly
2856 * checked by comparing the buffer size with fcx_max_data. As long as
2857 * the buffer size is smaller we can operate in transport mode and
2858 * process multiple tracks. If not, only one track at once is being
2859 * processed using command mode.
2860 */
2861 if ((private->features.feature[40] & 0x04) &&
2862 fmt_buffer_size <= private->fcx_max_data)
2863 tpm = 1;
2864
2865 rc = dasd_eckd_format_process_data(base, &cdata->expect, enable_pav,
2866 tpm, fmt_buffer, rpt_max, &irb);
2867 if (rc && rc != -EIO)
2868 goto out;
2869 if (rc == -EIO) {
2870 /*
2871 * If our first attempt with transport mode enabled comes back
2872 * with an incorrect length error, we're going to retry the
2873 * check with command mode.
2874 */
2875 if (tpm && scsw_cstat(&irb.scsw) == 0x40) {
2876 tpm = 0;
2877 rc = dasd_eckd_format_process_data(base, &cdata->expect,
2878 enable_pav, tpm,
2879 fmt_buffer, rpt_max,
2880 &irb);
2881 if (rc)
2882 goto out;
2883 } else {
2884 goto out;
2885 }
2886 }
2887
2888 dasd_eckd_format_evaluate_tracks(fmt_buffer, cdata, rpt_max, rpt_exp,
2889 trk_per_cyl, tpm);
2890
2891out:
2892 kfree(fmt_buffer);
2893
2894 return rc;
570d237c
JH		 2895}
2896
8e09f215 2897static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr)
1da177e4 2898{
a2ace466
HR		 2899 if (cqr->retries < 0) {
2900 cqr->status = DASD_CQR_FAILED;
2901 return;
2902 }
8e09f215
SW		 2903 cqr->status = DASD_CQR_FILLED;
2904 if (cqr->block && (cqr->startdev != cqr->block->base)) {
2905 dasd_eckd_reset_ccw_to_base_io(cqr);
2906 cqr->startdev = cqr->block->base;
c9346151 2907 cqr->lpm = dasd_path_get_opm(cqr->block->base);
1da177e4 2908 }
8e09f215 2909};
1da177e4
LT		 2910
2911static dasd_erp_fn_t
2912dasd_eckd_erp_action(struct dasd_ccw_req * cqr)
2913{
8e09f215 2914 struct dasd_device *device = (struct dasd_device *) cqr->startdev;
1da177e4
LT		 2915 struct ccw_device *cdev = device->cdev;
2916
2917 switch (cdev->id.cu_type) {
2918 case 0x3990:
2919 case 0x2105:
2920 case 0x2107:
2921 case 0x1750:
2922 return dasd_3990_erp_action;
2923 case 0x9343:
2924 case 0x3880:
2925 default:
2926 return dasd_default_erp_action;
2927 }
2928}
2929
2930static dasd_erp_fn_t
2931dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr)
2932{
2933 return dasd_default_erp_postaction;
2934}
2935
5a27e60d
SW		 2936static void dasd_eckd_check_for_device_change(struct dasd_device *device,
2937 struct dasd_ccw_req *cqr,
2938 struct irb *irb)
8e09f215
SW		 2939{
2940 char mask;
f3eb5384 2941 char *sense = NULL;
543691a4 2942 struct dasd_eckd_private *private = device->private;
8e09f215
SW		 2943
2944 /* first of all check for state change pending interrupt */
2945 mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP;
f3eb5384 2946 if ((scsw_dstat(&irb->scsw) & mask) == mask) {
c8d1c0ff
SH		 2947 /*
2948 * for alias only, not in offline processing
2949 * and only if not suspended
2950 */
501183f2 2951 if (!device->block && private->lcu &&
25e2cf1c 2952 device->state == DASD_STATE_ONLINE &&
c8d1c0ff
SH		 2953 !test_bit(DASD_FLAG_OFFLINE, &device->flags) &&
2954 !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) {
501183f2
SH		 2955 /* schedule worker to reload device */
2956 dasd_reload_device(device);
2957 }
8e09f215
SW		 2958 dasd_generic_handle_state_change(device);
2959 return;
2960 }
2961
a5a0061f 2962 sense = dasd_get_sense(irb);
5a27e60d
SW		 2963 if (!sense)
2964 return;
2965
2966 /* summary unit check */
c7a29e56 2967 if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) &&
a5a0061f 2968 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) {
59a9ed5f
SH		 2969 if (test_and_set_bit(DASD_FLAG_SUC, &device->flags)) {
2970 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2971 "eckd suc: device already notified");
2972 return;
2973 }
2974 sense = dasd_get_sense(irb);
2975 if (!sense) {
2976 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
2977 "eckd suc: no reason code available");
2978 clear_bit(DASD_FLAG_SUC, &device->flags);
2979 return;
2980
2981 }
2982 private->suc_reason = sense[8];
2983 DBF_DEV_EVENT(DBF_NOTICE, device, "%s %x",
2984 "eckd handle summary unit check: reason",
2985 private->suc_reason);
2986 dasd_get_device(device);
2987 if (!schedule_work(&device->suc_work))
2988 dasd_put_device(device);
2989
8e09f215
SW		 2990 return;
2991 }
2992
f60c768c 2993 /* service information message SIM */
5a27e60d 2994 if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) &&
f3eb5384
SW		 2995 ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) {
2996 dasd_3990_erp_handle_sim(device, sense);
f60c768c
SH		 2997 return;
2998 }
2999
5a27e60d
SW		 3000 /* loss of device reservation is handled via base devices only
3001 * as alias devices may be used with several bases
3002 */
c7a29e56
SW		 3003 if (device->block && (sense[27] & DASD_SENSE_BIT_0) &&
3004 (sense[7] == 0x3F) &&
5a27e60d
SW		 3005 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) &&
3006 test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) {
3007 if (device->features & DASD_FEATURE_FAILONSLCK)
3008 set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags);
3009 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags);
3010 dev_err(&device->cdev->dev,
3011 "The device reservation was lost\n");
ada3df91 3012 }
5a27e60d 3013}
f3eb5384
SW		 3014
3015static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single(
3016 struct dasd_device *startdev,
8e09f215 3017 struct dasd_block *block,
f3eb5384
SW		 3018 struct request *req,
3019 sector_t first_rec,
3020 sector_t last_rec,
3021 sector_t first_trk,
3022 sector_t last_trk,
3023 unsigned int first_offs,
3024 unsigned int last_offs,
3025 unsigned int blk_per_trk,
3026 unsigned int blksize)
1da177e4
LT		 3027{
3028 struct dasd_eckd_private *private;
3029 unsigned long *idaws;
3030 struct LO_eckd_data *LO_data;
3031 struct dasd_ccw_req *cqr;
3032 struct ccw1 *ccw;
5705f702 3033 struct req_iterator iter;
7988613b 3034 struct bio_vec bv;
1da177e4 3035 char *dst;
f3eb5384 3036 unsigned int off;
1da177e4 3037 int count, cidaw, cplength, datasize;
f3eb5384 3038 sector_t recid;
1da177e4 3039 unsigned char cmd, rcmd;
8e09f215
SW		 3040 int use_prefix;
3041 struct dasd_device *basedev;
1da177e4 3042
8e09f215 3043 basedev = block->base;
543691a4 3044 private = basedev->private;
1da177e4
LT		 3045 if (rq_data_dir(req) == READ)
3046 cmd = DASD_ECKD_CCW_READ_MT;
3047 else if (rq_data_dir(req) == WRITE)
3048 cmd = DASD_ECKD_CCW_WRITE_MT;
3049 else
3050 return ERR_PTR(-EINVAL);
f3eb5384 3051
1da177e4
LT		 3052 /* Check struct bio and count the number of blocks for the request. */
3053 count = 0;
3054 cidaw = 0;
5705f702 3055 rq_for_each_segment(bv, req, iter) {
7988613b 3056 if (bv.bv_len & (blksize - 1))
6c92e699
JA		 3057 /* Eckd can only do full blocks. */
3058 return ERR_PTR(-EINVAL);
7988613b 3059 count += bv.bv_len >> (block->s2b_shift + 9);
7988613b
KO		 3060 if (idal_is_needed (page_address(bv.bv_page), bv.bv_len))
3061 cidaw += bv.bv_len >> (block->s2b_shift + 9);
1da177e4
LT		 3062 }
3063 /* Paranoia. */
3064 if (count != last_rec - first_rec + 1)
3065 return ERR_PTR(-EINVAL);
8e09f215
SW		 3066
3067 /* use the prefix command if available */
3068 use_prefix = private->features.feature[8] & 0x01;
3069 if (use_prefix) {
3070 /* 1x prefix + number of blocks */
3071 cplength = 2 + count;
3072 /* 1x prefix + cidaws*sizeof(long) */
3073 datasize = sizeof(struct PFX_eckd_data) +
3074 sizeof(struct LO_eckd_data) +
3075 cidaw * sizeof(unsigned long);
3076 } else {
3077 /* 1x define extent + 1x locate record + number of blocks */
3078 cplength = 2 + count;
3079 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */
3080 datasize = sizeof(struct DE_eckd_data) +
3081 sizeof(struct LO_eckd_data) +
3082 cidaw * sizeof(unsigned long);
3083 }
1da177e4
LT		 3084 /* Find out the number of additional locate record ccws for cdl. */
3085 if (private->uses_cdl && first_rec < 2*blk_per_trk) {
3086 if (last_rec >= 2*blk_per_trk)
3087 count = 2*blk_per_trk - first_rec;
3088 cplength += count;
3089 datasize += count*sizeof(struct LO_eckd_data);
3090 }
3091 /* Allocate the ccw request. */
68b781fe 3092 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
c5205f2f 3093 startdev, blk_mq_rq_to_pdu(req));
1da177e4
LT		 3094 if (IS_ERR(cqr))
3095 return cqr;
3096 ccw = cqr->cpaddr;
8e09f215
SW		 3097 /* First ccw is define extent or prefix. */
3098 if (use_prefix) {
3099 if (prefix(ccw++, cqr->data, first_trk,
3100 last_trk, cmd, basedev, startdev) == -EAGAIN) {
3101 /* Clock not in sync and XRC is enabled.
3102 * Try again later.
3103 */
3104 dasd_sfree_request(cqr, startdev);
3105 return ERR_PTR(-EAGAIN);
3106 }
3107 idaws = (unsigned long *) (cqr->data +
3108 sizeof(struct PFX_eckd_data));
3109 } else {
3110 if (define_extent(ccw++, cqr->data, first_trk,
45f186be 3111 last_trk, cmd, basedev, 0) == -EAGAIN) {
8e09f215
SW		 3112 /* Clock not in sync and XRC is enabled.
3113 * Try again later.
3114 */
3115 dasd_sfree_request(cqr, startdev);
3116 return ERR_PTR(-EAGAIN);
3117 }
3118 idaws = (unsigned long *) (cqr->data +
3119 sizeof(struct DE_eckd_data));
d54853ef 3120 }
1da177e4 3121 /* Build locate_record+read/write/ccws. */
1da177e4
LT		 3122 LO_data = (struct LO_eckd_data *) (idaws + cidaw);
3123 recid = first_rec;
3124 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) {
3125 /* Only standard blocks so there is just one locate record. */
3126 ccw[-1].flags |= CCW_FLAG_CC;
3127 locate_record(ccw++, LO_data++, first_trk, first_offs + 1,
8e09f215 3128 last_rec - recid + 1, cmd, basedev, blksize);
1da177e4 3129 }
5705f702 3130 rq_for_each_segment(bv, req, iter) {
7988613b 3131 dst = page_address(bv.bv_page) + bv.bv_offset;
1da177e4
LT		 3132 if (dasd_page_cache) {
3133 char *copy = kmem_cache_alloc(dasd_page_cache,
441e143e 3134 GFP_DMA | __GFP_NOWARN);
1da177e4 3135 if (copy && rq_data_dir(req) == WRITE)
7988613b 3136 memcpy(copy + bv.bv_offset, dst, bv.bv_len);
1da177e4 3137 if (copy)
7988613b 3138 dst = copy + bv.bv_offset;
1da177e4 3139 }
7988613b 3140 for (off = 0; off < bv.bv_len; off += blksize) {
1da177e4
LT		 3141 sector_t trkid = recid;
3142 unsigned int recoffs = sector_div(trkid, blk_per_trk);
3143 rcmd = cmd;
3144 count = blksize;
3145 /* Locate record for cdl special block ? */
3146 if (private->uses_cdl && recid < 2*blk_per_trk) {
3147 if (dasd_eckd_cdl_special(blk_per_trk, recid)){
3148 rcmd |= 0x8;
3149 count = dasd_eckd_cdl_reclen(recid);
ec5883ab
HH		 3150 if (count < blksize &&
3151 rq_data_dir(req) == READ)
1da177e4
LT		 3152 memset(dst + count, 0xe5,
3153 blksize - count);
3154 }
3155 ccw[-1].flags |= CCW_FLAG_CC;
3156 locate_record(ccw++, LO_data++,
3157 trkid, recoffs + 1,
8e09f215 3158 1, rcmd, basedev, count);
1da177e4
LT		 3159 }
3160 /* Locate record for standard blocks ? */
3161 if (private->uses_cdl && recid == 2*blk_per_trk) {
3162 ccw[-1].flags |= CCW_FLAG_CC;
3163 locate_record(ccw++, LO_data++,
3164 trkid, recoffs + 1,
3165 last_rec - recid + 1,
8e09f215 3166 cmd, basedev, count);
1da177e4
LT		 3167 }
3168 /* Read/write ccw. */
3169 ccw[-1].flags |= CCW_FLAG_CC;
3170 ccw->cmd_code = rcmd;
3171 ccw->count = count;
3172 if (idal_is_needed(dst, blksize)) {
3173 ccw->cda = (__u32)(addr_t) idaws;
3174 ccw->flags = CCW_FLAG_IDA;
3175 idaws = idal_create_words(idaws, dst, blksize);
3176 } else {
3177 ccw->cda = (__u32)(addr_t) dst;
3178 ccw->flags = 0;
3179 }
3180 ccw++;
3181 dst += blksize;
3182 recid++;
3183 }
3184 }
13de227b
HS		 3185 if (blk_noretry_request(req) ||
3186 block->base->features & DASD_FEATURE_FAILFAST)
1c01b8a5 3187 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
8e09f215
SW		 3188 cqr->startdev = startdev;
3189 cqr->memdev = startdev;
3190 cqr->block = block;
7c8faa86 3191 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
c9346151 3192 cqr->lpm = dasd_path_get_ppm(startdev);
1f1ee9ad 3193 cqr->retries = startdev->default_retries;
1aae0560 3194 cqr->buildclk = get_tod_clock();
1da177e4
LT		 3195 cqr->status = DASD_CQR_FILLED;
3196 return cqr;
3197}
3198
f3eb5384
SW		 3199static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track(
3200 struct dasd_device *startdev,
3201 struct dasd_block *block,
3202 struct request *req,
3203 sector_t first_rec,
3204 sector_t last_rec,
3205 sector_t first_trk,
3206 sector_t last_trk,
3207 unsigned int first_offs,
3208 unsigned int last_offs,
3209 unsigned int blk_per_trk,
3210 unsigned int blksize)
3211{
f3eb5384
SW		 3212 unsigned long *idaws;
3213 struct dasd_ccw_req *cqr;
3214 struct ccw1 *ccw;
3215 struct req_iterator iter;
7988613b 3216 struct bio_vec bv;
f3eb5384
SW		 3217 char *dst, *idaw_dst;
3218 unsigned int cidaw, cplength, datasize;
3219 unsigned int tlf;
3220 sector_t recid;
3221 unsigned char cmd;
3222 struct dasd_device *basedev;
3223 unsigned int trkcount, count, count_to_trk_end;
3224 unsigned int idaw_len, seg_len, part_len, len_to_track_end;
3225 unsigned char new_track, end_idaw;
3226 sector_t trkid;
3227 unsigned int recoffs;
3228
3229 basedev = block->base;
f3eb5384
SW		 3230 if (rq_data_dir(req) == READ)
3231 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
3232 else if (rq_data_dir(req) == WRITE)
3233 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
3234 else
3235 return ERR_PTR(-EINVAL);
3236
3237 /* Track based I/O needs IDAWs for each page, and not just for
3238 * 64 bit addresses. We need additional idals for pages
3239 * that get filled from two tracks, so we use the number
3240 * of records as upper limit.
3241 */
3242 cidaw = last_rec - first_rec + 1;
3243 trkcount = last_trk - first_trk + 1;
3244
3245 /* 1x prefix + one read/write ccw per track */
3246 cplength = 1 + trkcount;
3247
7bf76f01 3248 datasize = sizeof(struct PFX_eckd_data) + cidaw * sizeof(unsigned long);
f3eb5384
SW		 3249
3250 /* Allocate the ccw request. */
68b781fe 3251 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
c5205f2f 3252 startdev, blk_mq_rq_to_pdu(req));
f3eb5384
SW		 3253 if (IS_ERR(cqr))
3254 return cqr;
3255 ccw = cqr->cpaddr;
3256 /* transfer length factor: how many bytes to read from the last track */
3257 if (first_trk == last_trk)
3258 tlf = last_offs - first_offs + 1;
3259 else
3260 tlf = last_offs + 1;
3261 tlf *= blksize;
3262
3263 if (prefix_LRE(ccw++, cqr->data, first_trk,
3264 last_trk, cmd, basedev, startdev,
3265 1 /* format */, first_offs + 1,
3266 trkcount, blksize,
3267 tlf) == -EAGAIN) {
3268 /* Clock not in sync and XRC is enabled.
3269 * Try again later.
3270 */
3271 dasd_sfree_request(cqr, startdev);
3272 return ERR_PTR(-EAGAIN);
3273 }
3274
3275 /*
3276 * The translation of request into ccw programs must meet the
3277 * following conditions:
3278 * - all idaws but the first and the last must address full pages
3279 * (or 2K blocks on 31-bit)
3280 * - the scope of a ccw and it's idal ends with the track boundaries
3281 */
3282 idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data));
3283 recid = first_rec;
3284 new_track = 1;
3285 end_idaw = 0;
3286 len_to_track_end = 0;
246ccea1 3287 idaw_dst = NULL;
f3eb5384
SW		 3288 idaw_len = 0;
3289 rq_for_each_segment(bv, req, iter) {
7988613b
KO		 3290 dst = page_address(bv.bv_page) + bv.bv_offset;
3291 seg_len = bv.bv_len;
f3eb5384
SW		 3292 while (seg_len) {
3293 if (new_track) {
3294 trkid = recid;
3295 recoffs = sector_div(trkid, blk_per_trk);
3296 count_to_trk_end = blk_per_trk - recoffs;
3297 count = min((last_rec - recid + 1),
3298 (sector_t)count_to_trk_end);
3299 len_to_track_end = count * blksize;
3300 ccw[-1].flags |= CCW_FLAG_CC;
3301 ccw->cmd_code = cmd;
3302 ccw->count = len_to_track_end;
3303 ccw->cda = (__u32)(addr_t)idaws;
3304 ccw->flags = CCW_FLAG_IDA;
3305 ccw++;
3306 recid += count;
3307 new_track = 0;
52db45c3
SW		 3308 /* first idaw for a ccw may start anywhere */
3309 if (!idaw_dst)
3310 idaw_dst = dst;
f3eb5384 3311 }
52db45c3
SW		 3312 /* If we start a new idaw, we must make sure that it
3313 * starts on an IDA_BLOCK_SIZE boundary.
f3eb5384
SW		 3314 * If we continue an idaw, we must make sure that the
3315 * current segment begins where the so far accumulated
3316 * idaw ends
3317 */
52db45c3
SW		 3318 if (!idaw_dst) {
3319 if (__pa(dst) & (IDA_BLOCK_SIZE-1)) {
3320 dasd_sfree_request(cqr, startdev);
3321 return ERR_PTR(-ERANGE);
3322 } else
3323 idaw_dst = dst;
3324 }
f3eb5384
SW		 3325 if ((idaw_dst + idaw_len) != dst) {
3326 dasd_sfree_request(cqr, startdev);
3327 return ERR_PTR(-ERANGE);
3328 }
3329 part_len = min(seg_len, len_to_track_end);
3330 seg_len -= part_len;
3331 dst += part_len;
3332 idaw_len += part_len;
3333 len_to_track_end -= part_len;
3334 /* collected memory area ends on an IDA_BLOCK border,
3335 * -> create an idaw
3336 * idal_create_words will handle cases where idaw_len
3337 * is larger then IDA_BLOCK_SIZE
3338 */
3339 if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1)))
3340 end_idaw = 1;
3341 /* We also need to end the idaw at track end */
3342 if (!len_to_track_end) {
3343 new_track = 1;
3344 end_idaw = 1;
3345 }
3346 if (end_idaw) {
3347 idaws = idal_create_words(idaws, idaw_dst,
3348 idaw_len);
246ccea1 3349 idaw_dst = NULL;
f3eb5384
SW		 3350 idaw_len = 0;
3351 end_idaw = 0;
3352 }
3353 }
3354 }
3355
3356 if (blk_noretry_request(req) ||
3357 block->base->features & DASD_FEATURE_FAILFAST)
3358 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
3359 cqr->startdev = startdev;
3360 cqr->memdev = startdev;
3361 cqr->block = block;
7c8faa86 3362 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
c9346151 3363 cqr->lpm = dasd_path_get_ppm(startdev);
1f1ee9ad 3364 cqr->retries = startdev->default_retries;
1aae0560 3365 cqr->buildclk = get_tod_clock();
f3eb5384
SW		 3366 cqr->status = DASD_CQR_FILLED;
3367 return cqr;
3368}
3369
3370static int prepare_itcw(struct itcw *itcw,
3371 unsigned int trk, unsigned int totrk, int cmd,
3372 struct dasd_device *basedev,
3373 struct dasd_device *startdev,
3374 unsigned int rec_on_trk, int count,
3375 unsigned int blksize,
3376 unsigned int total_data_size,
3377 unsigned int tlf,
3378 unsigned int blk_per_trk)
3379{
3380 struct PFX_eckd_data pfxdata;
3381 struct dasd_eckd_private *basepriv, *startpriv;
3382 struct DE_eckd_data *dedata;
3383 struct LRE_eckd_data *lredata;
3384 struct dcw *dcw;
3385
3386 u32 begcyl, endcyl;
3387 u16 heads, beghead, endhead;
3388 u8 pfx_cmd;
3389
3390 int rc = 0;
3391 int sector = 0;
3392 int dn, d;
3393
3394
3395 /* setup prefix data */
543691a4
SO		 3396 basepriv = basedev->private;
3397 startpriv = startdev->private;
f3eb5384
SW		 3398 dedata = &pfxdata.define_extent;
3399 lredata = &pfxdata.locate_record;
3400
3401 memset(&pfxdata, 0, sizeof(pfxdata));
3402 pfxdata.format = 1; /* PFX with LRE */
3403 pfxdata.base_address = basepriv->ned->unit_addr;
3404 pfxdata.base_lss = basepriv->ned->ID;
3405 pfxdata.validity.define_extent = 1;
3406
3407 /* private uid is kept up to date, conf_data may be outdated */
da340f92
SH		 3408 if (startpriv->uid.type == UA_BASE_PAV_ALIAS)
3409 pfxdata.validity.verify_base = 1;
3410
3411 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) {
f3eb5384 3412 pfxdata.validity.verify_base = 1;
da340f92 3413 pfxdata.validity.hyper_pav = 1;
f3eb5384
SW		 3414 }
3415
3416 switch (cmd) {
3417 case DASD_ECKD_CCW_READ_TRACK_DATA:
3418 dedata->mask.perm = 0x1;
3419 dedata->attributes.operation = basepriv->attrib.operation;
3420 dedata->blk_size = blksize;
3421 dedata->ga_extended |= 0x42;
3422 lredata->operation.orientation = 0x0;
3423 lredata->operation.operation = 0x0C;
3424 lredata->auxiliary.check_bytes = 0x01;
3425 pfx_cmd = DASD_ECKD_CCW_PFX_READ;
3426 break;
3427 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
3428 dedata->mask.perm = 0x02;
3429 dedata->attributes.operation = basepriv->attrib.operation;
3430 dedata->blk_size = blksize;
5628683c 3431 rc = set_timestamp(NULL, dedata, basedev);
f3eb5384
SW		 3432 dedata->ga_extended |= 0x42;
3433 lredata->operation.orientation = 0x0;
3434 lredata->operation.operation = 0x3F;
3435 lredata->extended_operation = 0x23;
3436 lredata->auxiliary.check_bytes = 0x2;
45f186be
JH		 3437 /*
3438 * If XRC is supported the System Time Stamp is set. The
3439 * validity of the time stamp must be reflected in the prefix
3440 * data as well.
3441 */
3442 if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02)
3443 pfxdata.validity.time_stamp = 1; /* 'Time Stamp Valid' */
f3eb5384
SW		 3444 pfx_cmd = DASD_ECKD_CCW_PFX;
3445 break;
8fd57520
JH		 3446 case DASD_ECKD_CCW_READ_COUNT_MT:
3447 dedata->mask.perm = 0x1;
3448 dedata->attributes.operation = DASD_BYPASS_CACHE;
3449 dedata->ga_extended |= 0x42;
3450 dedata->blk_size = blksize;
3451 lredata->operation.orientation = 0x2;
3452 lredata->operation.operation = 0x16;
3453 lredata->auxiliary.check_bytes = 0x01;
3454 pfx_cmd = DASD_ECKD_CCW_PFX_READ;
3455 break;
f3eb5384
SW		 3456 default:
3457 DBF_DEV_EVENT(DBF_ERR, basedev,
3458 "prepare itcw, unknown opcode 0x%x", cmd);
3459 BUG();
3460 break;
3461 }
3462 if (rc)
3463 return rc;
3464
3465 dedata->attributes.mode = 0x3; /* ECKD */
3466
3467 heads = basepriv->rdc_data.trk_per_cyl;
3468 begcyl = trk / heads;
3469 beghead = trk % heads;
3470 endcyl = totrk / heads;
3471 endhead = totrk % heads;
3472
3473 /* check for sequential prestage - enhance cylinder range */
3474 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE ||
3475 dedata->attributes.operation == DASD_SEQ_ACCESS) {
3476
3477 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl)
3478 endcyl += basepriv->attrib.nr_cyl;
3479 else
3480 endcyl = (basepriv->real_cyl - 1);
3481 }
3482
3483 set_ch_t(&dedata->beg_ext, begcyl, beghead);
3484 set_ch_t(&dedata->end_ext, endcyl, endhead);
3485
3486 dedata->ep_format = 0x20; /* records per track is valid */
3487 dedata->ep_rec_per_track = blk_per_trk;
3488
3489 if (rec_on_trk) {
3490 switch (basepriv->rdc_data.dev_type) {
3491 case 0x3390:
3492 dn = ceil_quot(blksize + 6, 232);
3493 d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34);
3494 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
3495 break;
3496 case 0x3380:
3497 d = 7 + ceil_quot(blksize + 12, 32);
3498 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
3499 break;
3500 }
3501 }
3502
8fd57520
JH		 3503 if (cmd == DASD_ECKD_CCW_READ_COUNT_MT) {
3504 lredata->auxiliary.length_valid = 0;
3505 lredata->auxiliary.length_scope = 0;
3506 lredata->sector = 0xff;
3507 } else {
3508 lredata->auxiliary.length_valid = 1;
3509 lredata->auxiliary.length_scope = 1;
3510 lredata->sector = sector;
3511 }
f3eb5384
SW		 3512 lredata->auxiliary.imbedded_ccw_valid = 1;
3513 lredata->length = tlf;
3514 lredata->imbedded_ccw = cmd;
3515 lredata->count = count;
f3eb5384
SW		 3516 set_ch_t(&lredata->seek_addr, begcyl, beghead);
3517 lredata->search_arg.cyl = lredata->seek_addr.cyl;
3518 lredata->search_arg.head = lredata->seek_addr.head;
3519 lredata->search_arg.record = rec_on_trk;
3520
3521 dcw = itcw_add_dcw(itcw, pfx_cmd, 0,
3522 &pfxdata, sizeof(pfxdata), total_data_size);
757853ea 3523 return PTR_ERR_OR_ZERO(dcw);
f3eb5384
SW		 3524}
3525
3526static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track(
3527 struct dasd_device *startdev,
3528 struct dasd_block *block,
3529 struct request *req,
3530 sector_t first_rec,
3531 sector_t last_rec,
3532 sector_t first_trk,
3533 sector_t last_trk,
3534 unsigned int first_offs,
3535 unsigned int last_offs,
3536 unsigned int blk_per_trk,
3537 unsigned int blksize)
3538{
f3eb5384
SW		 3539 struct dasd_ccw_req *cqr;
3540 struct req_iterator iter;
7988613b 3541 struct bio_vec bv;
f3eb5384
SW		 3542 char *dst;
3543 unsigned int trkcount, ctidaw;
3544 unsigned char cmd;
3545 struct dasd_device *basedev;
3546 unsigned int tlf;
3547 struct itcw *itcw;
3548 struct tidaw *last_tidaw = NULL;
3549 int itcw_op;
3550 size_t itcw_size;
ef19298b
SW		 3551 u8 tidaw_flags;
3552 unsigned int seg_len, part_len, len_to_track_end;
3553 unsigned char new_track;
3554 sector_t recid, trkid;
3555 unsigned int offs;
3556 unsigned int count, count_to_trk_end;
cd10502b 3557 int ret;
f3eb5384
SW		 3558
3559 basedev = block->base;
f3eb5384
SW		 3560 if (rq_data_dir(req) == READ) {
3561 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
3562 itcw_op = ITCW_OP_READ;
3563 } else if (rq_data_dir(req) == WRITE) {
3564 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
3565 itcw_op = ITCW_OP_WRITE;
3566 } else
3567 return ERR_PTR(-EINVAL);
3568
3569 /* trackbased I/O needs address all memory via TIDAWs,
3570 * not just for 64 bit addresses. This allows us to map
3571 * each segment directly to one tidaw.
ef19298b
SW		 3572 * In the case of write requests, additional tidaws may
3573 * be needed when a segment crosses a track boundary.
f3eb5384
SW		 3574 */
3575 trkcount = last_trk - first_trk + 1;
3576 ctidaw = 0;
3577 rq_for_each_segment(bv, req, iter) {
3578 ++ctidaw;
3579 }
ef19298b
SW		 3580 if (rq_data_dir(req) == WRITE)
3581 ctidaw += (last_trk - first_trk);
f3eb5384
SW		 3582
3583 /* Allocate the ccw request. */
3584 itcw_size = itcw_calc_size(0, ctidaw, 0);
c5205f2f
SO		 3585 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev,
3586 blk_mq_rq_to_pdu(req));
f3eb5384
SW		 3587 if (IS_ERR(cqr))
3588 return cqr;
3589
f3eb5384
SW		 3590 /* transfer length factor: how many bytes to read from the last track */
3591 if (first_trk == last_trk)
3592 tlf = last_offs - first_offs + 1;
3593 else
3594 tlf = last_offs + 1;
3595 tlf *= blksize;
3596
3597 itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0);
ef19298b 3598 if (IS_ERR(itcw)) {
cd10502b
JL		 3599 ret = -EINVAL;
3600 goto out_error;
ef19298b 3601 }
f3eb5384 3602 cqr->cpaddr = itcw_get_tcw(itcw);
f3eb5384
SW		 3603 if (prepare_itcw(itcw, first_trk, last_trk,
3604 cmd, basedev, startdev,
3605 first_offs + 1,
3606 trkcount, blksize,
3607 (last_rec - first_rec + 1) * blksize,
3608 tlf, blk_per_trk) == -EAGAIN) {
3609 /* Clock not in sync and XRC is enabled.
3610 * Try again later.
3611 */
cd10502b
JL		 3612 ret = -EAGAIN;
3613 goto out_error;
f3eb5384 3614 }
d54cddb6 3615 len_to_track_end = 0;
f3eb5384
SW		 3616 /*
3617 * A tidaw can address 4k of memory, but must not cross page boundaries
3618 * We can let the block layer handle this by setting
3619 * blk_queue_segment_boundary to page boundaries and
3620 * blk_max_segment_size to page size when setting up the request queue.
ef19298b
SW		 3621 * For write requests, a TIDAW must not cross track boundaries, because
3622 * we have to set the CBC flag on the last tidaw for each track.
f3eb5384 3623 */
ef19298b
SW		 3624 if (rq_data_dir(req) == WRITE) {
3625 new_track = 1;
3626 recid = first_rec;
3627 rq_for_each_segment(bv, req, iter) {
7988613b
KO		 3628 dst = page_address(bv.bv_page) + bv.bv_offset;
3629 seg_len = bv.bv_len;
ef19298b
SW		 3630 while (seg_len) {
3631 if (new_track) {
3632 trkid = recid;
3633 offs = sector_div(trkid, blk_per_trk);
3634 count_to_trk_end = blk_per_trk - offs;
3635 count = min((last_rec - recid + 1),
3636 (sector_t)count_to_trk_end);
3637 len_to_track_end = count * blksize;
3638 recid += count;
3639 new_track = 0;
3640 }
3641 part_len = min(seg_len, len_to_track_end);
3642 seg_len -= part_len;
3643 len_to_track_end -= part_len;
3644 /* We need to end the tidaw at track end */
3645 if (!len_to_track_end) {
3646 new_track = 1;
3647 tidaw_flags = TIDAW_FLAGS_INSERT_CBC;
3648 } else
3649 tidaw_flags = 0;
3650 last_tidaw = itcw_add_tidaw(itcw, tidaw_flags,
3651 dst, part_len);
cd10502b
JL		 3652 if (IS_ERR(last_tidaw)) {
3653 ret = -EINVAL;
3654 goto out_error;
3655 }
ef19298b
SW		 3656 dst += part_len;
3657 }
3658 }
3659 } else {
3660 rq_for_each_segment(bv, req, iter) {
7988613b 3661 dst = page_address(bv.bv_page) + bv.bv_offset;
ef19298b 3662 last_tidaw = itcw_add_tidaw(itcw, 0x00,
7988613b 3663 dst, bv.bv_len);
cd10502b
JL		 3664 if (IS_ERR(last_tidaw)) {
3665 ret = -EINVAL;
3666 goto out_error;
3667 }
ef19298b 3668 }
f3eb5384 3669 }
ef19298b
SW		 3670 last_tidaw->flags |= TIDAW_FLAGS_LAST;
3671 last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC;
f3eb5384
SW		 3672 itcw_finalize(itcw);
3673
3674 if (blk_noretry_request(req) ||
3675 block->base->features & DASD_FEATURE_FAILFAST)
3676 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
ef19298b 3677 cqr->cpmode = 1;
f3eb5384
SW		 3678 cqr->startdev = startdev;
3679 cqr->memdev = startdev;
3680 cqr->block = block;
7c8faa86 3681 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
c9346151 3682 cqr->lpm = dasd_path_get_ppm(startdev);
1f1ee9ad 3683 cqr->retries = startdev->default_retries;
1aae0560 3684 cqr->buildclk = get_tod_clock();
f3eb5384
SW		 3685 cqr->status = DASD_CQR_FILLED;
3686 return cqr;
cd10502b
JL		 3687out_error:
3688 dasd_sfree_request(cqr, startdev);
3689 return ERR_PTR(ret);
f3eb5384
SW		 3690}
3691
3692static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev,
3693 struct dasd_block *block,
3694 struct request *req)
3695{
ef19298b 3696 int cmdrtd, cmdwtd;
f3eb5384 3697 int use_prefix;
ef19298b 3698 int fcx_multitrack;
45b44d76 3699 struct dasd_eckd_private *private;
f3eb5384
SW		 3700 struct dasd_device *basedev;
3701 sector_t first_rec, last_rec;
3702 sector_t first_trk, last_trk;
3703 unsigned int first_offs, last_offs;
3704 unsigned int blk_per_trk, blksize;
3705 int cdlspecial;
ef19298b 3706 unsigned int data_size;
f3eb5384
SW		 3707 struct dasd_ccw_req *cqr;
3708
3709 basedev = block->base;
543691a4 3710 private = basedev->private;
f3eb5384
SW		 3711
3712 /* Calculate number of blocks/records per track. */
3713 blksize = block->bp_block;
3714 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
6fca97a9
SH		 3715 if (blk_per_trk == 0)
3716 return ERR_PTR(-EINVAL);
f3eb5384 3717 /* Calculate record id of first and last block. */
83096ebf 3718 first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift;
f3eb5384
SW		 3719 first_offs = sector_div(first_trk, blk_per_trk);
3720 last_rec = last_trk =
83096ebf 3721 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift;
f3eb5384
SW		 3722 last_offs = sector_div(last_trk, blk_per_trk);
3723 cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk);
3724
ef19298b
SW		 3725 fcx_multitrack = private->features.feature[40] & 0x20;
3726 data_size = blk_rq_bytes(req);
26a35f37
SW		 3727 if (data_size % blksize)
3728 return ERR_PTR(-EINVAL);
ef19298b
SW		 3729 /* tpm write request add CBC data on each track boundary */
3730 if (rq_data_dir(req) == WRITE)
3731 data_size += (last_trk - first_trk) * 4;
f3eb5384
SW		 3732
3733 /* is read track data and write track data in command mode supported? */
3734 cmdrtd = private->features.feature[9] & 0x20;
3735 cmdwtd = private->features.feature[12] & 0x40;
3736 use_prefix = private->features.feature[8] & 0x01;
3737
3738 cqr = NULL;
3739 if (cdlspecial || dasd_page_cache) {
3740 /* do nothing, just fall through to the cmd mode single case */
ef19298b
SW		 3741 } else if ((data_size <= private->fcx_max_data)
3742 && (fcx_multitrack || (first_trk == last_trk))) {
f3eb5384
SW		 3743 cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req,
3744 first_rec, last_rec,
3745 first_trk, last_trk,
3746 first_offs, last_offs,
3747 blk_per_trk, blksize);
ef19298b
SW		 3748 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) &&
3749 (PTR_ERR(cqr) != -ENOMEM))
f3eb5384
SW		 3750 cqr = NULL;
3751 } else if (use_prefix &&
3752 (((rq_data_dir(req) == READ) && cmdrtd) ||
3753 ((rq_data_dir(req) == WRITE) && cmdwtd))) {
3754 cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req,
3755 first_rec, last_rec,
3756 first_trk, last_trk,
3757 first_offs, last_offs,
3758 blk_per_trk, blksize);
ef19298b
SW		 3759 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) &&
3760 (PTR_ERR(cqr) != -ENOMEM))
f3eb5384
SW		 3761 cqr = NULL;
3762 }
3763 if (!cqr)
3764 cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req,
3765 first_rec, last_rec,
3766 first_trk, last_trk,
3767 first_offs, last_offs,
3768 blk_per_trk, blksize);
3769 return cqr;
3770}
3771
bbc7f7ea
JH		 3772static struct dasd_ccw_req *dasd_eckd_build_cp_raw(struct dasd_device *startdev,
3773 struct dasd_block *block,
3774 struct request *req)
e4dbb0f2 3775{
9d2be0c1
JH		 3776 sector_t start_padding_sectors, end_sector_offset, end_padding_sectors;
3777 unsigned int seg_len, len_to_track_end;
3778 unsigned int cidaw, cplength, datasize;
3779 sector_t first_trk, last_trk, sectors;
3780 struct dasd_eckd_private *base_priv;
e4dbb0f2 3781 struct dasd_device *basedev;
e4dbb0f2 3782 struct req_iterator iter;
9d2be0c1
JH		 3783 struct dasd_ccw_req *cqr;
3784 unsigned int first_offs;
3785 unsigned int trkcount;
3786 unsigned long *idaws;
3787 unsigned int size;
3788 unsigned char cmd;
7988613b 3789 struct bio_vec bv;
9d2be0c1
JH		 3790 struct ccw1 *ccw;
3791 int use_prefix;
3792 void *data;
e4dbb0f2 3793 char *dst;
e4dbb0f2
SH		 3794
3795 /*
3796 * raw track access needs to be mutiple of 64k and on 64k boundary
558b9ef0
SW		 3797 * For read requests we can fix an incorrect alignment by padding
3798 * the request with dummy pages.
e4dbb0f2 3799 */
558b9ef0
SW		 3800 start_padding_sectors = blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK;
3801 end_sector_offset = (blk_rq_pos(req) + blk_rq_sectors(req)) %
3802 DASD_RAW_SECTORS_PER_TRACK;
3803 end_padding_sectors = (DASD_RAW_SECTORS_PER_TRACK - end_sector_offset) %
3804 DASD_RAW_SECTORS_PER_TRACK;
3805 basedev = block->base;
3806 if ((start_padding_sectors || end_padding_sectors) &&
3807 (rq_data_dir(req) == WRITE)) {
3808 DBF_DEV_EVENT(DBF_ERR, basedev,
e78c21d1 3809 "raw write not track aligned (%llu,%llu) req %p",
558b9ef0 3810 start_padding_sectors, end_padding_sectors, req);
9d2be0c1 3811 return ERR_PTR(-EINVAL);
e4dbb0f2
SH		 3812 }
3813
3814 first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK;
3815 last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) /
3816 DASD_RAW_SECTORS_PER_TRACK;
3817 trkcount = last_trk - first_trk + 1;
3818 first_offs = 0;
e4dbb0f2
SH		 3819
3820 if (rq_data_dir(req) == READ)
3821 cmd = DASD_ECKD_CCW_READ_TRACK;
3822 else if (rq_data_dir(req) == WRITE)
3823 cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK;
9d2be0c1
JH		 3824 else
3825 return ERR_PTR(-EINVAL);
e4dbb0f2
SH		 3826
3827 /*
3828 * Raw track based I/O needs IDAWs for each page,
3829 * and not just for 64 bit addresses.
3830 */
3831 cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK;
3832
e4dbb0f2 3833 /*
9d2be0c1
JH		 3834 * struct PFX_eckd_data and struct LRE_eckd_data can have up to 2 bytes
3835 * of extended parameter. This is needed for write full track.
e4dbb0f2 3836 */
9d2be0c1
JH		 3837 base_priv = basedev->private;
3838 use_prefix = base_priv->features.feature[8] & 0x01;
3839 if (use_prefix) {
3840 cplength = 1 + trkcount;
3841 size = sizeof(struct PFX_eckd_data) + 2;
3842 } else {
3843 cplength = 2 + trkcount;
3844 size = sizeof(struct DE_eckd_data) +
3845 sizeof(struct LRE_eckd_data) + 2;
3846 }
3847 size = ALIGN(size, 8);
e4dbb0f2 3848
7bf76f01 3849 datasize = size + cidaw * sizeof(unsigned long);
e4dbb0f2
SH		 3850
3851 /* Allocate the ccw request. */
3852 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength,
c5205f2f 3853 datasize, startdev, blk_mq_rq_to_pdu(req));
e4dbb0f2 3854 if (IS_ERR(cqr))
9d2be0c1
JH		 3855 return cqr;
3856
e4dbb0f2 3857 ccw = cqr->cpaddr;
9d2be0c1 3858 data = cqr->data;
e4dbb0f2 3859
9d2be0c1
JH		 3860 if (use_prefix) {
3861 prefix_LRE(ccw++, data, first_trk, last_trk, cmd, basedev,
3862 startdev, 1, first_offs + 1, trkcount, 0, 0);
3863 } else {
3864 define_extent(ccw++, data, first_trk, last_trk, cmd, basedev, 0);
3865 ccw[-1].flags |= CCW_FLAG_CC;
3866
3867 data += sizeof(struct DE_eckd_data);
3868 locate_record_ext(ccw++, data, first_trk, first_offs + 1,
3869 trkcount, cmd, basedev, 0, 0);
e4dbb0f2
SH		 3870 }
3871
9d2be0c1 3872 idaws = (unsigned long *)(cqr->data + size);
e4dbb0f2 3873 len_to_track_end = 0;
558b9ef0
SW		 3874 if (start_padding_sectors) {
3875 ccw[-1].flags |= CCW_FLAG_CC;
3876 ccw->cmd_code = cmd;
3877 /* maximum 3390 track size */
3878 ccw->count = 57326;
3879 /* 64k map to one track */
3880 len_to_track_end = 65536 - start_padding_sectors * 512;
3881 ccw->cda = (__u32)(addr_t)idaws;
3882 ccw->flags |= CCW_FLAG_IDA;
3883 ccw->flags |= CCW_FLAG_SLI;
3884 ccw++;
3885 for (sectors = 0; sectors < start_padding_sectors; sectors += 8)
3886 idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE);
3887 }
e4dbb0f2 3888 rq_for_each_segment(bv, req, iter) {
7988613b
KO		 3889 dst = page_address(bv.bv_page) + bv.bv_offset;
3890 seg_len = bv.bv_len;
558b9ef0
SW		 3891 if (cmd == DASD_ECKD_CCW_READ_TRACK)
3892 memset(dst, 0, seg_len);
e4dbb0f2
SH		 3893 if (!len_to_track_end) {
3894 ccw[-1].flags |= CCW_FLAG_CC;
3895 ccw->cmd_code = cmd;
3896 /* maximum 3390 track size */
3897 ccw->count = 57326;
3898 /* 64k map to one track */
3899 len_to_track_end = 65536;
3900 ccw->cda = (__u32)(addr_t)idaws;
3901 ccw->flags |= CCW_FLAG_IDA;
3902 ccw->flags |= CCW_FLAG_SLI;
3903 ccw++;
3904 }
3905 len_to_track_end -= seg_len;
3906 idaws = idal_create_words(idaws, dst, seg_len);
3907 }
558b9ef0
SW		 3908 for (sectors = 0; sectors < end_padding_sectors; sectors += 8)
3909 idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE);
e4dbb0f2
SH		 3910 if (blk_noretry_request(req) ||
3911 block->base->features & DASD_FEATURE_FAILFAST)
3912 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
3913 cqr->startdev = startdev;
3914 cqr->memdev = startdev;
3915 cqr->block = block;
3916 cqr->expires = startdev->default_expires * HZ;
c9346151 3917 cqr->lpm = dasd_path_get_ppm(startdev);
1f1ee9ad 3918 cqr->retries = startdev->default_retries;
1aae0560 3919 cqr->buildclk = get_tod_clock();
e4dbb0f2
SH		 3920 cqr->status = DASD_CQR_FILLED;
3921
e4dbb0f2
SH		 3922 return cqr;
3923}
3924
3925
1da177e4
LT		 3926static int
3927dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req)
3928{
3929 struct dasd_eckd_private *private;
3930 struct ccw1 *ccw;
5705f702 3931 struct req_iterator iter;
7988613b 3932 struct bio_vec bv;
1da177e4
LT		 3933 char *dst, *cda;
3934 unsigned int blksize, blk_per_trk, off;
3935 sector_t recid;
5705f702 3936 int status;
1da177e4
LT		 3937
3938 if (!dasd_page_cache)
3939 goto out;
543691a4 3940 private = cqr->block->base->private;
8e09f215 3941 blksize = cqr->block->bp_block;
1da177e4 3942 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
83096ebf 3943 recid = blk_rq_pos(req) >> cqr->block->s2b_shift;
1da177e4
LT		 3944 ccw = cqr->cpaddr;
3945 /* Skip over define extent & locate record. */
3946 ccw++;
3947 if (private->uses_cdl == 0 || recid > 2*blk_per_trk)
3948 ccw++;
5705f702 3949 rq_for_each_segment(bv, req, iter) {
7988613b
KO		 3950 dst = page_address(bv.bv_page) + bv.bv_offset;
3951 for (off = 0; off < bv.bv_len; off += blksize) {
1da177e4
LT		 3952 /* Skip locate record. */
3953 if (private->uses_cdl && recid <= 2*blk_per_trk)
3954 ccw++;
3955 if (dst) {
3956 if (ccw->flags & CCW_FLAG_IDA)
3957 cda = *((char **)((addr_t) ccw->cda));
3958 else
3959 cda = (char *)((addr_t) ccw->cda);
3960 if (dst != cda) {
3961 if (rq_data_dir(req) == READ)
7988613b 3962 memcpy(dst, cda, bv.bv_len);
1da177e4
LT		 3963 kmem_cache_free(dasd_page_cache,
3964 (void *)((addr_t)cda & PAGE_MASK));
3965 }
3966 dst = NULL;
3967 }
3968 ccw++;
3969 recid++;
3970 }
3971 }
3972out:
3973 status = cqr->status == DASD_CQR_DONE;
8e09f215 3974 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 3975 return status;
3976}
3977
8e09f215 3978/*
f3eb5384 3979 * Modify ccw/tcw in cqr so it can be started on a base device.
8e09f215
SW		 3980 *
3981 * Note that this is not enough to restart the cqr!
3982 * Either reset cqr->startdev as well (summary unit check handling)
3983 * or restart via separate cqr (as in ERP handling).
3984 */
3985void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr)
3986{
3987 struct ccw1 *ccw;
3988 struct PFX_eckd_data *pfxdata;
f3eb5384
SW		 3989 struct tcw *tcw;
3990 struct tccb *tccb;
3991 struct dcw *dcw;
3992
3993 if (cqr->cpmode == 1) {
3994 tcw = cqr->cpaddr;
3995 tccb = tcw_get_tccb(tcw);
3996 dcw = (struct dcw *)&tccb->tca[0];
3997 pfxdata = (struct PFX_eckd_data *)&dcw->cd[0];
8e09f215
SW		 3998 pfxdata->validity.verify_base = 0;
3999 pfxdata->validity.hyper_pav = 0;
f3eb5384
SW		 4000 } else {
4001 ccw = cqr->cpaddr;
4002 pfxdata = cqr->data;
4003 if (ccw->cmd_code == DASD_ECKD_CCW_PFX) {
4004 pfxdata->validity.verify_base = 0;
4005 pfxdata->validity.hyper_pav = 0;
4006 }
8e09f215
SW		 4007 }
4008}
4009
4010#define DASD_ECKD_CHANQ_MAX_SIZE 4
4011
4012static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base,
4013 struct dasd_block *block,
4014 struct request *req)
4015{
4016 struct dasd_eckd_private *private;
4017 struct dasd_device *startdev;
4018 unsigned long flags;
4019 struct dasd_ccw_req *cqr;
4020
4021 startdev = dasd_alias_get_start_dev(base);
4022 if (!startdev)
4023 startdev = base;
543691a4 4024 private = startdev->private;
8e09f215
SW		 4025 if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE)
4026 return ERR_PTR(-EBUSY);
4027
4028 spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags);
4029 private->count++;
e4dbb0f2 4030 if ((base->features & DASD_FEATURE_USERAW))
bbc7f7ea 4031 cqr = dasd_eckd_build_cp_raw(startdev, block, req);
e4dbb0f2
SH		 4032 else
4033 cqr = dasd_eckd_build_cp(startdev, block, req);
8e09f215
SW		 4034 if (IS_ERR(cqr))
4035 private->count--;
4036 spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags);
4037 return cqr;
4038}
4039
4040static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr,
4041 struct request *req)
4042{
4043 struct dasd_eckd_private *private;
4044 unsigned long flags;
4045
4046 spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags);
543691a4 4047 private = cqr->memdev->private;
8e09f215
SW		 4048 private->count--;
4049 spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags);
4050 return dasd_eckd_free_cp(cqr, req);
4051}
4052
1da177e4
LT		 4053static int
4054dasd_eckd_fill_info(struct dasd_device * device,
4055 struct dasd_information2_t * info)
4056{
543691a4 4057 struct dasd_eckd_private *private = device->private;
1da177e4 4058
1da177e4
LT		 4059 info->label_block = 2;
4060 info->FBA_layout = private->uses_cdl ? 0 : 1;
4061 info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL;
543691a4 4062 info->characteristics_size = sizeof(private->rdc_data);
1da177e4 4063 memcpy(info->characteristics, &private->rdc_data,
543691a4 4064 sizeof(private->rdc_data));
4abb08c2
SW		 4065 info->confdata_size = min((unsigned long)private->conf_len,
4066 sizeof(info->configuration_data));
4067 memcpy(info->configuration_data, private->conf_data,
4068 info->confdata_size);
1da177e4
LT		 4069 return 0;
4070}
4071
4072/*
4073 * SECTION: ioctl functions for eckd devices.
4074 */
4075
4076/*
4077 * Release device ioctl.
138c014d 4078 * Buils a channel programm to releases a prior reserved
1da177e4
LT		 4079 * (see dasd_eckd_reserve) device.
4080 */
4081static int
1107ccfb 4082dasd_eckd_release(struct dasd_device *device)
1da177e4 4083{
1da177e4
LT		 4084 struct dasd_ccw_req *cqr;
4085 int rc;
f3eb5384 4086 struct ccw1 *ccw;
f932bcea 4087 int useglobal;
1da177e4
LT		 4088
4089 if (!capable(CAP_SYS_ADMIN))
4090 return -EACCES;
4091
f932bcea 4092 useglobal = 0;
c5205f2f 4093 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL);
1da177e4 4094 if (IS_ERR(cqr)) {
f932bcea
SW		 4095 mutex_lock(&dasd_reserve_mutex);
4096 useglobal = 1;
4097 cqr = &dasd_reserve_req->cqr;
4098 memset(cqr, 0, sizeof(*cqr));
4099 memset(&dasd_reserve_req->ccw, 0,
4100 sizeof(dasd_reserve_req->ccw));
4101 cqr->cpaddr = &dasd_reserve_req->ccw;
4102 cqr->data = &dasd_reserve_req->data;
4103 cqr->magic = DASD_ECKD_MAGIC;
1da177e4 4104 }
f3eb5384
SW		 4105 ccw = cqr->cpaddr;
4106 ccw->cmd_code = DASD_ECKD_CCW_RELEASE;
4107 ccw->flags |= CCW_FLAG_SLI;
4108 ccw->count = 32;
4109 ccw->cda = (__u32)(addr_t) cqr->data;
8e09f215
SW		 4110 cqr->startdev = device;
4111 cqr->memdev = device;
1da177e4 4112 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1c01b8a5 4113 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
336c340b 4114 cqr->retries = 2; /* set retry counter to enable basic ERP */
1da177e4 4115 cqr->expires = 2 * HZ;
1aae0560 4116 cqr->buildclk = get_tod_clock();
1da177e4
LT		 4117 cqr->status = DASD_CQR_FILLED;
4118
4119 rc = dasd_sleep_on_immediatly(cqr);
5a27e60d
SW		 4120 if (!rc)
4121 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags);
1da177e4 4122
f932bcea
SW		 4123 if (useglobal)
4124 mutex_unlock(&dasd_reserve_mutex);
4125 else
4126 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 4127 return rc;
4128}
4129
4130/*
4131 * Reserve device ioctl.
4132 * Options are set to 'synchronous wait for interrupt' and
138c014d
HH		 4133 * 'timeout the request'. This leads to a terminate IO if
4134 * the interrupt is outstanding for a certain time.
1da177e4
LT		 4135 */
4136static int
1107ccfb 4137dasd_eckd_reserve(struct dasd_device *device)
1da177e4 4138{
1da177e4
LT		 4139 struct dasd_ccw_req *cqr;
4140 int rc;
f3eb5384 4141 struct ccw1 *ccw;
f932bcea 4142 int useglobal;
1da177e4
LT		 4143
4144 if (!capable(CAP_SYS_ADMIN))
4145 return -EACCES;
4146
f932bcea 4147 useglobal = 0;
c5205f2f 4148 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL);
1da177e4 4149 if (IS_ERR(cqr)) {
f932bcea
SW		 4150 mutex_lock(&dasd_reserve_mutex);
4151 useglobal = 1;
4152 cqr = &dasd_reserve_req->cqr;
4153 memset(cqr, 0, sizeof(*cqr));
4154 memset(&dasd_reserve_req->ccw, 0,
4155 sizeof(dasd_reserve_req->ccw));
4156 cqr->cpaddr = &dasd_reserve_req->ccw;
4157 cqr->data = &dasd_reserve_req->data;
4158 cqr->magic = DASD_ECKD_MAGIC;
1da177e4 4159 }
f3eb5384
SW		 4160 ccw = cqr->cpaddr;
4161 ccw->cmd_code = DASD_ECKD_CCW_RESERVE;
4162 ccw->flags |= CCW_FLAG_SLI;
4163 ccw->count = 32;
4164 ccw->cda = (__u32)(addr_t) cqr->data;
8e09f215
SW		 4165 cqr->startdev = device;
4166 cqr->memdev = device;
1da177e4 4167 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1c01b8a5 4168 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
336c340b 4169 cqr->retries = 2; /* set retry counter to enable basic ERP */
1da177e4 4170 cqr->expires = 2 * HZ;
1aae0560 4171 cqr->buildclk = get_tod_clock();
1da177e4
LT		 4172 cqr->status = DASD_CQR_FILLED;
4173
4174 rc = dasd_sleep_on_immediatly(cqr);
5a27e60d
SW		 4175 if (!rc)
4176 set_bit(DASD_FLAG_IS_RESERVED, &device->flags);
1da177e4 4177
f932bcea
SW		 4178 if (useglobal)
4179 mutex_unlock(&dasd_reserve_mutex);
4180 else
4181 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 4182 return rc;
4183}
4184
4185/*
4186 * Steal lock ioctl - unconditional reserve device.
138c014d 4187 * Buils a channel programm to break a device's reservation.
1da177e4
LT		 4188 * (unconditional reserve)
4189 */
4190static int
1107ccfb 4191dasd_eckd_steal_lock(struct dasd_device *device)
1da177e4 4192{
1da177e4
LT		 4193 struct dasd_ccw_req *cqr;
4194 int rc;
f3eb5384 4195 struct ccw1 *ccw;
f932bcea 4196 int useglobal;
1da177e4
LT		 4197
4198 if (!capable(CAP_SYS_ADMIN))
4199 return -EACCES;
4200
f932bcea 4201 useglobal = 0;
c5205f2f 4202 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL);
1da177e4 4203 if (IS_ERR(cqr)) {
f932bcea
SW		 4204 mutex_lock(&dasd_reserve_mutex);
4205 useglobal = 1;
4206 cqr = &dasd_reserve_req->cqr;
4207 memset(cqr, 0, sizeof(*cqr));
4208 memset(&dasd_reserve_req->ccw, 0,
4209 sizeof(dasd_reserve_req->ccw));
4210 cqr->cpaddr = &dasd_reserve_req->ccw;
4211 cqr->data = &dasd_reserve_req->data;
4212 cqr->magic = DASD_ECKD_MAGIC;
1da177e4 4213 }
f3eb5384
SW		 4214 ccw = cqr->cpaddr;
4215 ccw->cmd_code = DASD_ECKD_CCW_SLCK;
4216 ccw->flags |= CCW_FLAG_SLI;
4217 ccw->count = 32;
4218 ccw->cda = (__u32)(addr_t) cqr->data;
8e09f215
SW		 4219 cqr->startdev = device;
4220 cqr->memdev = device;
1da177e4 4221 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1c01b8a5 4222 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
336c340b 4223 cqr->retries = 2; /* set retry counter to enable basic ERP */
1da177e4 4224 cqr->expires = 2 * HZ;
1aae0560 4225 cqr->buildclk = get_tod_clock();
1da177e4
LT		 4226 cqr->status = DASD_CQR_FILLED;
4227
4228 rc = dasd_sleep_on_immediatly(cqr);
5a27e60d
SW		 4229 if (!rc)
4230 set_bit(DASD_FLAG_IS_RESERVED, &device->flags);
1da177e4 4231
f932bcea
SW		 4232 if (useglobal)
4233 mutex_unlock(&dasd_reserve_mutex);
4234 else
4235 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 4236 return rc;
4237}
4238
196339f1
SW		 4239/*
4240 * SNID - Sense Path Group ID
4241 * This ioctl may be used in situations where I/O is stalled due to
4242 * a reserve, so if the normal dasd_smalloc_request fails, we use the
4243 * preallocated dasd_reserve_req.
4244 */
4245static int dasd_eckd_snid(struct dasd_device *device,
4246 void __user *argp)
4247{
4248 struct dasd_ccw_req *cqr;
4249 int rc;
4250 struct ccw1 *ccw;
4251 int useglobal;
4252 struct dasd_snid_ioctl_data usrparm;
4253
4254 if (!capable(CAP_SYS_ADMIN))
4255 return -EACCES;
4256
4257 if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
4258 return -EFAULT;
4259
4260 useglobal = 0;
4261 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1,
c5205f2f
SO		 4262 sizeof(struct dasd_snid_data), device,
4263 NULL);
196339f1
SW		 4264 if (IS_ERR(cqr)) {
4265 mutex_lock(&dasd_reserve_mutex);
4266 useglobal = 1;
4267 cqr = &dasd_reserve_req->cqr;
4268 memset(cqr, 0, sizeof(*cqr));
4269 memset(&dasd_reserve_req->ccw, 0,
4270 sizeof(dasd_reserve_req->ccw));
4271 cqr->cpaddr = &dasd_reserve_req->ccw;
4272 cqr->data = &dasd_reserve_req->data;
4273 cqr->magic = DASD_ECKD_MAGIC;
4274 }
4275 ccw = cqr->cpaddr;
4276 ccw->cmd_code = DASD_ECKD_CCW_SNID;
4277 ccw->flags |= CCW_FLAG_SLI;
4278 ccw->count = 12;
4279 ccw->cda = (__u32)(addr_t) cqr->data;
4280 cqr->startdev = device;
4281 cqr->memdev = device;
4282 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
4283 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
5a27e60d 4284 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags);
196339f1
SW		 4285 cqr->retries = 5;
4286 cqr->expires = 10 * HZ;
1aae0560 4287 cqr->buildclk = get_tod_clock();
196339f1
SW		 4288 cqr->status = DASD_CQR_FILLED;
4289 cqr->lpm = usrparm.path_mask;
4290
4291 rc = dasd_sleep_on_immediatly(cqr);
4292 /* verify that I/O processing didn't modify the path mask */
4293 if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask))
4294 rc = -EIO;
4295 if (!rc) {
4296 usrparm.data = *((struct dasd_snid_data *)cqr->data);
4297 if (copy_to_user(argp, &usrparm, sizeof(usrparm)))
4298 rc = -EFAULT;
4299 }
4300
4301 if (useglobal)
4302 mutex_unlock(&dasd_reserve_mutex);
4303 else
4304 dasd_sfree_request(cqr, cqr->memdev);
4305 return rc;
4306}
4307
1da177e4
LT		 4308/*
4309 * Read performance statistics
4310 */
4311static int
1107ccfb 4312dasd_eckd_performance(struct dasd_device *device, void __user *argp)
1da177e4 4313{
1da177e4
LT		 4314 struct dasd_psf_prssd_data *prssdp;
4315 struct dasd_rssd_perf_stats_t *stats;
4316 struct dasd_ccw_req *cqr;
4317 struct ccw1 *ccw;
4318 int rc;
4319
68b781fe 4320 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
8e09f215
SW		 4321 (sizeof(struct dasd_psf_prssd_data) +
4322 sizeof(struct dasd_rssd_perf_stats_t)),
c5205f2f 4323 device, NULL);
1da177e4 4324 if (IS_ERR(cqr)) {
fc19f381 4325 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 4326 "Could not allocate initialization request");
4327 return PTR_ERR(cqr);
4328 }
8e09f215
SW		 4329 cqr->startdev = device;
4330 cqr->memdev = device;
1da177e4 4331 cqr->retries = 0;
eb6e199b 4332 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1da177e4
LT		 4333 cqr->expires = 10 * HZ;
4334
4335 /* Prepare for Read Subsystem Data */
4336 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
8e09f215 4337 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
1da177e4 4338 prssdp->order = PSF_ORDER_PRSSD;
5d67d164 4339 prssdp->suborder = 0x01; /* Performance Statistics */
1da177e4
LT		 4340 prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */
4341
4342 ccw = cqr->cpaddr;
4343 ccw->cmd_code = DASD_ECKD_CCW_PSF;
8e09f215 4344 ccw->count = sizeof(struct dasd_psf_prssd_data);
1da177e4
LT		 4345 ccw->flags |= CCW_FLAG_CC;
4346 ccw->cda = (__u32)(addr_t) prssdp;
4347
4348 /* Read Subsystem Data - Performance Statistics */
4349 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
8e09f215 4350 memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t));
1da177e4
LT		 4351
4352 ccw++;
4353 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
8e09f215 4354 ccw->count = sizeof(struct dasd_rssd_perf_stats_t);
1da177e4
LT		 4355 ccw->cda = (__u32)(addr_t) stats;
4356
1aae0560 4357 cqr->buildclk = get_tod_clock();
1da177e4
LT		 4358 cqr->status = DASD_CQR_FILLED;
4359 rc = dasd_sleep_on(cqr);
4360 if (rc == 0) {
1da177e4
LT		 4361 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
4362 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
1107ccfb
CH		 4363 if (copy_to_user(argp, stats,
4364 sizeof(struct dasd_rssd_perf_stats_t)))
4365 rc = -EFAULT;
1da177e4 4366 }
8e09f215 4367 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 4368 return rc;
4369}
4370
4371/*
4372 * Get attributes (cache operations)
4373 * Returnes the cache attributes used in Define Extend (DE).
4374 */
4375static int
1107ccfb 4376dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp)
1da177e4 4377{
543691a4 4378 struct dasd_eckd_private *private = device->private;
1107ccfb 4379 struct attrib_data_t attrib = private->attrib;
1da177e4
LT		 4380 int rc;
4381
4382 if (!capable(CAP_SYS_ADMIN))
4383 return -EACCES;
1107ccfb 4384 if (!argp)
1da177e4
LT		 4385 return -EINVAL;
4386
1107ccfb
CH		 4387 rc = 0;
4388 if (copy_to_user(argp, (long *) &attrib,
8e09f215 4389 sizeof(struct attrib_data_t)))
1107ccfb 4390 rc = -EFAULT;
1da177e4
LT		 4391
4392 return rc;
4393}
4394
4395/*
4396 * Set attributes (cache operations)
4397 * Stores the attributes for cache operation to be used in Define Extend (DE).
4398 */
4399static int
1107ccfb 4400dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp)
1da177e4 4401{
543691a4 4402 struct dasd_eckd_private *private = device->private;
1da177e4
LT		 4403 struct attrib_data_t attrib;
4404
4405 if (!capable(CAP_SYS_ADMIN))
4406 return -EACCES;
1107ccfb 4407 if (!argp)
1da177e4
LT		 4408 return -EINVAL;
4409
1107ccfb 4410 if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t)))
1da177e4 4411 return -EFAULT;
1da177e4
LT		 4412 private->attrib = attrib;
4413
fc19f381
SH		 4414 dev_info(&device->cdev->dev,
4415 "The DASD cache mode was set to %x (%i cylinder prestage)\n",
4416 private->attrib.operation, private->attrib.nr_cyl);
1da177e4
LT		 4417 return 0;
4418}
4419
ab1d848f
NH		 4420/*
4421 * Issue syscall I/O to EMC Symmetrix array.
4422 * CCWs are PSF and RSSD
4423 */
4424static int dasd_symm_io(struct dasd_device *device, void __user *argp)
4425{
4426 struct dasd_symmio_parms usrparm;
4427 char *psf_data, *rssd_result;
4428 struct dasd_ccw_req *cqr;
4429 struct ccw1 *ccw;
52898025 4430 char psf0, psf1;
ab1d848f
NH		 4431 int rc;
4432
52898025
NH		 4433 if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
4434 return -EACCES;
4435 psf0 = psf1 = 0;
4436
ab1d848f
NH		 4437 /* Copy parms from caller */
4438 rc = -EFAULT;
4439 if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
4440 goto out;
92d62891 4441 if (is_compat_task()) {
f8b06859 4442 /* Make sure pointers are sane even on 31 bit. */
ab1d848f 4443 rc = -EINVAL;
f8b06859
HC		 4444 if ((usrparm.psf_data >> 32) != 0)
4445 goto out;
4446 if ((usrparm.rssd_result >> 32) != 0)
4447 goto out;
4448 usrparm.psf_data &= 0x7fffffffULL;
4449 usrparm.rssd_result &= 0x7fffffffULL;
ab1d848f 4450 }
4a8ef699
SH		 4451 /* at least 2 bytes are accessed and should be allocated */
4452 if (usrparm.psf_data_len < 2) {
4453 DBF_DEV_EVENT(DBF_WARNING, device,
4454 "Symmetrix ioctl invalid data length %d",
4455 usrparm.psf_data_len);
4456 rc = -EINVAL;
4457 goto out;
4458 }
ab1d848f
NH		 4459 /* alloc I/O data area */
4460 psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA);
4461 rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA);
4462 if (!psf_data || !rssd_result) {
4463 rc = -ENOMEM;
4464 goto out_free;
4465 }
4466
4467 /* get syscall header from user space */
4468 rc = -EFAULT;
4469 if (copy_from_user(psf_data,
4470 (void __user *)(unsigned long) usrparm.psf_data,
4471 usrparm.psf_data_len))
4472 goto out_free;
52898025
NH		 4473 psf0 = psf_data[0];
4474 psf1 = psf_data[1];
ab1d848f
NH		 4475
4476 /* setup CCWs for PSF + RSSD */
c5205f2f 4477 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2, 0, device, NULL);
ab1d848f 4478 if (IS_ERR(cqr)) {
fc19f381 4479 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
ab1d848f
NH		 4480 "Could not allocate initialization request");
4481 rc = PTR_ERR(cqr);
4482 goto out_free;
4483 }
4484
4485 cqr->startdev = device;
4486 cqr->memdev = device;
4487 cqr->retries = 3;
4488 cqr->expires = 10 * HZ;
1aae0560 4489 cqr->buildclk = get_tod_clock();
ab1d848f
NH		 4490 cqr->status = DASD_CQR_FILLED;
4491
4492 /* Build the ccws */
4493 ccw = cqr->cpaddr;
4494
4495 /* PSF ccw */
4496 ccw->cmd_code = DASD_ECKD_CCW_PSF;
4497 ccw->count = usrparm.psf_data_len;
4498 ccw->flags |= CCW_FLAG_CC;
4499 ccw->cda = (__u32)(addr_t) psf_data;
4500
4501 ccw++;
4502
4503 /* RSSD ccw */
4504 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
4505 ccw->count = usrparm.rssd_result_len;
4506 ccw->flags = CCW_FLAG_SLI ;
4507 ccw->cda = (__u32)(addr_t) rssd_result;
4508
4509 rc = dasd_sleep_on(cqr);
4510 if (rc)
4511 goto out_sfree;
4512
4513 rc = -EFAULT;
4514 if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result,
4515 rssd_result, usrparm.rssd_result_len))
4516 goto out_sfree;
4517 rc = 0;
4518
4519out_sfree:
4520 dasd_sfree_request(cqr, cqr->memdev);
4521out_free:
4522 kfree(rssd_result);
4523 kfree(psf_data);
4524out:
52898025
NH		 4525 DBF_DEV_EVENT(DBF_WARNING, device,
4526 "Symmetrix ioctl (0x%02x 0x%02x): rc=%d",
4527 (int) psf0, (int) psf1, rc);
ab1d848f
NH		 4528 return rc;
4529}
4530
1107ccfb 4531static int
8e09f215 4532dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp)
1107ccfb 4533{
8e09f215
SW		 4534 struct dasd_device *device = block->base;
4535
1107ccfb
CH		 4536 switch (cmd) {
4537 case BIODASDGATTR:
4538 return dasd_eckd_get_attrib(device, argp);
4539 case BIODASDSATTR:
4540 return dasd_eckd_set_attrib(device, argp);
4541 case BIODASDPSRD:
4542 return dasd_eckd_performance(device, argp);
4543 case BIODASDRLSE:
4544 return dasd_eckd_release(device);
4545 case BIODASDRSRV:
4546 return dasd_eckd_reserve(device);
4547 case BIODASDSLCK:
4548 return dasd_eckd_steal_lock(device);
196339f1
SW		 4549 case BIODASDSNID:
4550 return dasd_eckd_snid(device, argp);
ab1d848f
NH		 4551 case BIODASDSYMMIO:
4552 return dasd_symm_io(device, argp);
1107ccfb 4553 default:
6b79d14e 4554 return -ENOTTY;
1107ccfb
CH		 4555 }
4556}
4557
445b5b49
HH		 4558/*
4559 * Dump the range of CCWs into 'page' buffer
4560 * and return number of printed chars.
4561 */
4d284cac 4562static int
445b5b49
HH		 4563dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page)
4564{
4565 int len, count;
4566 char *datap;
4567
4568 len = 0;
4569 while (from <= to) {
773bab4a 4570 len += sprintf(page + len, PRINTK_HEADER
445b5b49
HH		 4571 " CCW %p: %08X %08X DAT:",
4572 from, ((int *) from)[0], ((int *) from)[1]);
4573
4574 /* get pointer to data (consider IDALs) */
4575 if (from->flags & CCW_FLAG_IDA)
4576 datap = (char *) *((addr_t *) (addr_t) from->cda);
4577 else
4578 datap = (char *) ((addr_t) from->cda);
4579
4580 /* dump data (max 32 bytes) */
4581 for (count = 0; count < from->count && count < 32; count++) {
4582 if (count % 8 == 0) len += sprintf(page + len, " ");
4583 if (count % 4 == 0) len += sprintf(page + len, " ");
4584 len += sprintf(page + len, "%02x", datap[count]);
4585 }
4586 len += sprintf(page + len, "\n");
4587 from++;
4588 }
4589 return len;
4590}
4591
fc19f381 4592static void
aeec92ca
SH		 4593dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb,
4594 char *reason)
fc19f381
SH		 4595{
4596 u64 *sense;
a5a0061f 4597 u64 *stat;
aeec92ca
SH		 4598
4599 sense = (u64 *) dasd_get_sense(irb);
a5a0061f 4600 stat = (u64 *) &irb->scsw;
fc19f381 4601 if (sense) {
a5a0061f
SW		 4602 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : "
4603 "%016llx %016llx %016llx %016llx",
4604 reason, *stat, *((u32 *) (stat + 1)),
ed3640b2 4605 sense[0], sense[1], sense[2], sense[3]);
fc19f381 4606 } else {
a5a0061f
SW		 4607 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s",
4608 reason, *stat, *((u32 *) (stat + 1)),
4609 "NO VALID SENSE");
fc19f381
SH		 4610 }
4611}
4612
1da177e4
LT		 4613/*
4614 * Print sense data and related channel program.
4615 * Parts are printed because printk buffer is only 1024 bytes.
4616 */
f3eb5384 4617static void dasd_eckd_dump_sense_ccw(struct dasd_device *device,
8e09f215 4618 struct dasd_ccw_req *req, struct irb *irb)
1da177e4
LT		 4619{
4620 char *page;
445b5b49
HH		 4621 struct ccw1 *first, *last, *fail, *from, *to;
4622 int len, sl, sct;
1da177e4
LT		 4623
4624 page = (char *) get_zeroed_page(GFP_ATOMIC);
4625 if (page == NULL) {
fc19f381
SH		 4626 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
4627 "No memory to dump sense data\n");
1da177e4
LT		 4628 return;
4629 }
445b5b49 4630 /* dump the sense data */
773bab4a 4631 len = sprintf(page, PRINTK_HEADER
1da177e4 4632 " I/O status report for device %s:\n",
2a0217d5 4633 dev_name(&device->cdev->dev));
773bab4a 4634 len += sprintf(page + len, PRINTK_HEADER
a5a0061f
SW		 4635 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X "
4636 "CS:%02X RC:%d\n",
4637 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw),
4638 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw),
4639 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw),
4640 req ? req->intrc : 0);
773bab4a 4641 len += sprintf(page + len, PRINTK_HEADER
1da177e4 4642 " device %s: Failing CCW: %p\n",
2a0217d5 4643 dev_name(&device->cdev->dev),
23d805b6 4644 (void *) (addr_t) irb->scsw.cmd.cpa);
1da177e4
LT		 4645 if (irb->esw.esw0.erw.cons) {
4646 for (sl = 0; sl < 4; sl++) {
773bab4a 4647 len += sprintf(page + len, PRINTK_HEADER
1da177e4
LT		 4648 " Sense(hex) %2d-%2d:",
4649 (8 * sl), ((8 * sl) + 7));
4650
4651 for (sct = 0; sct < 8; sct++) {
4652 len += sprintf(page + len, " %02x",
4653 irb->ecw[8 * sl + sct]);
4654 }
4655 len += sprintf(page + len, "\n");
4656 }
4657
4658 if (irb->ecw[27] & DASD_SENSE_BIT_0) {
4659 /* 24 Byte Sense Data */
773bab4a 4660 sprintf(page + len, PRINTK_HEADER
445b5b49
HH		 4661 " 24 Byte: %x MSG %x, "
4662 "%s MSGb to SYSOP\n",
4663 irb->ecw[7] >> 4, irb->ecw[7] & 0x0f,
4664 irb->ecw[1] & 0x10 ? "" : "no");
1da177e4
LT		 4665 } else {
4666 /* 32 Byte Sense Data */
773bab4a 4667 sprintf(page + len, PRINTK_HEADER
445b5b49
HH		 4668 " 32 Byte: Format: %x "
4669 "Exception class %x\n",
4670 irb->ecw[6] & 0x0f, irb->ecw[22] >> 4);
1da177e4
LT		 4671 }
4672 } else {
773bab4a 4673 sprintf(page + len, PRINTK_HEADER
445b5b49 4674 " SORRY - NO VALID SENSE AVAILABLE\n");
1da177e4 4675 }
773bab4a 4676 printk(KERN_ERR "%s", page);
445b5b49 4677
8e09f215
SW		 4678 if (req) {
4679 /* req == NULL for unsolicited interrupts */
4680 /* dump the Channel Program (max 140 Bytes per line) */
4681 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */
4682 first = req->cpaddr;
4683 for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++);
4684 to = min(first + 6, last);
773bab4a 4685 len = sprintf(page, PRINTK_HEADER
8e09f215
SW		 4686 " Related CP in req: %p\n", req);
4687 dasd_eckd_dump_ccw_range(first, to, page + len);
773bab4a 4688 printk(KERN_ERR "%s", page);
1da177e4 4689
8e09f215
SW		 4690 /* print failing CCW area (maximum 4) */
4691 /* scsw->cda is either valid or zero */
4692 len = 0;
4693 from = ++to;
23d805b6
PO		 4694 fail = (struct ccw1 *)(addr_t)
4695 irb->scsw.cmd.cpa; /* failing CCW */
8e09f215
SW		 4696 if (from < fail - 2) {
4697 from = fail - 2; /* there is a gap - print header */
773bab4a 4698 len += sprintf(page, PRINTK_HEADER "......\n");
8e09f215
SW		 4699 }
4700 to = min(fail + 1, last);
4701 len += dasd_eckd_dump_ccw_range(from, to, page + len);
4702
4703 /* print last CCWs (maximum 2) */
4704 from = max(from, ++to);
4705 if (from < last - 1) {
4706 from = last - 1; /* there is a gap - print header */
773bab4a 4707 len += sprintf(page + len, PRINTK_HEADER "......\n");
8e09f215
SW		 4708 }
4709 len += dasd_eckd_dump_ccw_range(from, last, page + len);
4710 if (len > 0)
773bab4a 4711 printk(KERN_ERR "%s", page);
1da177e4 4712 }
1da177e4
LT		 4713 free_page((unsigned long) page);
4714}
4715
f3eb5384
SW		 4716
4717/*
4718 * Print sense data from a tcw.
4719 */
4720static void dasd_eckd_dump_sense_tcw(struct dasd_device *device,
4721 struct dasd_ccw_req *req, struct irb *irb)
4722{
4723 char *page;
4724 int len, sl, sct, residual;
f3eb5384 4725 struct tsb *tsb;
ef19298b 4726 u8 *sense, *rcq;
f3eb5384
SW		 4727
4728 page = (char *) get_zeroed_page(GFP_ATOMIC);
4729 if (page == NULL) {
fc19f381 4730 DBF_DEV_EVENT(DBF_WARNING, device, " %s",
f3eb5384
SW		 4731 "No memory to dump sense data");
4732 return;
4733 }
4734 /* dump the sense data */
773bab4a 4735 len = sprintf(page, PRINTK_HEADER
f3eb5384
SW		 4736 " I/O status report for device %s:\n",
4737 dev_name(&device->cdev->dev));
773bab4a 4738 len += sprintf(page + len, PRINTK_HEADER
a5a0061f
SW		 4739 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X "
4740 "CS:%02X fcxs:%02X schxs:%02X RC:%d\n",
4741 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw),
4742 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw),
4743 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw),
a521b048
SH		 4744 irb->scsw.tm.fcxs,
4745 (irb->scsw.tm.ifob << 7) | irb->scsw.tm.sesq,
a5a0061f 4746 req ? req->intrc : 0);
773bab4a 4747 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4748 " device %s: Failing TCW: %p\n",
4749 dev_name(&device->cdev->dev),
4750 (void *) (addr_t) irb->scsw.tm.tcw);
4751
4752 tsb = NULL;
4753 sense = NULL;
a5a0061f 4754 if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01))
f3eb5384
SW		 4755 tsb = tcw_get_tsb(
4756 (struct tcw *)(unsigned long)irb->scsw.tm.tcw);
4757
b8fde722 4758 if (tsb) {
773bab4a 4759 len += sprintf(page + len, PRINTK_HEADER
f3eb5384 4760 " tsb->length %d\n", tsb->length);
773bab4a 4761 len += sprintf(page + len, PRINTK_HEADER
f3eb5384 4762 " tsb->flags %x\n", tsb->flags);
773bab4a 4763 len += sprintf(page + len, PRINTK_HEADER
f3eb5384 4764 " tsb->dcw_offset %d\n", tsb->dcw_offset);
773bab4a 4765 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4766 " tsb->count %d\n", tsb->count);
4767 residual = tsb->count - 28;
773bab4a 4768 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4769 " residual %d\n", residual);
4770
4771 switch (tsb->flags & 0x07) {
4772 case 1: /* tsa_iostat */
773bab4a 4773 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4774 " tsb->tsa.iostat.dev_time %d\n",
4775 tsb->tsa.iostat.dev_time);
773bab4a 4776 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4777 " tsb->tsa.iostat.def_time %d\n",
4778 tsb->tsa.iostat.def_time);
773bab4a 4779 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4780 " tsb->tsa.iostat.queue_time %d\n",
4781 tsb->tsa.iostat.queue_time);
773bab4a 4782 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4783 " tsb->tsa.iostat.dev_busy_time %d\n",
4784 tsb->tsa.iostat.dev_busy_time);
773bab4a 4785 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4786 " tsb->tsa.iostat.dev_act_time %d\n",
4787 tsb->tsa.iostat.dev_act_time);
4788 sense = tsb->tsa.iostat.sense;
4789 break;
4790 case 2: /* ts_ddpc */
773bab4a 4791 len += sprintf(page + len, PRINTK_HEADER
f3eb5384 4792 " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc);
ef19298b 4793 for (sl = 0; sl < 2; sl++) {
773bab4a 4794 len += sprintf(page + len, PRINTK_HEADER
ef19298b
SW		 4795 " tsb->tsa.ddpc.rcq %2d-%2d: ",
4796 (8 * sl), ((8 * sl) + 7));
4797 rcq = tsb->tsa.ddpc.rcq;
f3eb5384
SW		 4798 for (sct = 0; sct < 8; sct++) {
4799 len += sprintf(page + len, " %02x",
ef19298b 4800 rcq[8 * sl + sct]);
f3eb5384
SW		 4801 }
4802 len += sprintf(page + len, "\n");
4803 }
4804 sense = tsb->tsa.ddpc.sense;
4805 break;
4806 case 3: /* tsa_intrg */
773bab4a 4807 len += sprintf(page + len, PRINTK_HEADER
8693b914 4808 " tsb->tsa.intrg.: not supported yet\n");
f3eb5384
SW		 4809 break;
4810 }
4811
4812 if (sense) {
4813 for (sl = 0; sl < 4; sl++) {
773bab4a 4814 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4815 " Sense(hex) %2d-%2d:",
4816 (8 * sl), ((8 * sl) + 7));
4817 for (sct = 0; sct < 8; sct++) {
4818 len += sprintf(page + len, " %02x",
4819 sense[8 * sl + sct]);
4820 }
4821 len += sprintf(page + len, "\n");
4822 }
4823
4824 if (sense[27] & DASD_SENSE_BIT_0) {
4825 /* 24 Byte Sense Data */
773bab4a 4826 sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4827 " 24 Byte: %x MSG %x, "
4828 "%s MSGb to SYSOP\n",
4829 sense[7] >> 4, sense[7] & 0x0f,
4830 sense[1] & 0x10 ? "" : "no");
4831 } else {
4832 /* 32 Byte Sense Data */
773bab4a 4833 sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4834 " 32 Byte: Format: %x "
4835 "Exception class %x\n",
4836 sense[6] & 0x0f, sense[22] >> 4);
4837 }
4838 } else {
773bab4a 4839 sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4840 " SORRY - NO VALID SENSE AVAILABLE\n");
4841 }
4842 } else {
773bab4a 4843 sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4844 " SORRY - NO TSB DATA AVAILABLE\n");
4845 }
773bab4a 4846 printk(KERN_ERR "%s", page);
f3eb5384
SW		 4847 free_page((unsigned long) page);
4848}
4849
4850static void dasd_eckd_dump_sense(struct dasd_device *device,
4851 struct dasd_ccw_req *req, struct irb *irb)
4852{
8fd57520
JH		 4853 u8 *sense = dasd_get_sense(irb);
4854
4855 if (scsw_is_tm(&irb->scsw)) {
4856 /*
4857 * In some cases the 'File Protected' or 'Incorrect Length'
4858 * error might be expected and log messages shouldn't be written
4859 * then. Check if the according suppress bit is set.
4860 */
4861 if (sense && (sense[1] & SNS1_FILE_PROTECTED) &&
4862 test_bit(DASD_CQR_SUPPRESS_FP, &req->flags))
4863 return;
4864 if (scsw_cstat(&irb->scsw) == 0x40 &&
4865 test_bit(DASD_CQR_SUPPRESS_IL, &req->flags))
4866 return;
4867
f3eb5384 4868 dasd_eckd_dump_sense_tcw(device, req, irb);
8fd57520
JH		 4869 } else {
4870 /*
ab24fbd3
SH		 4871 * In some cases the 'Command Reject' or 'No Record Found'
4872 * error might be expected and log messages shouldn't be
4873 * written then. Check if the according suppress bit is set.
8fd57520 4874 */
ab24fbd3
SH		 4875 if (sense && sense[0] & SNS0_CMD_REJECT &&
4876 test_bit(DASD_CQR_SUPPRESS_CR, &req->flags))
4877 return;
4878
8fd57520
JH		 4879 if (sense && sense[1] & SNS1_NO_REC_FOUND &&
4880 test_bit(DASD_CQR_SUPPRESS_NRF, &req->flags))
4881 return;
4882
f3eb5384 4883 dasd_eckd_dump_sense_ccw(device, req, irb);
8fd57520 4884 }
f3eb5384
SW		 4885}
4886
501183f2 4887static int dasd_eckd_pm_freeze(struct dasd_device *device)
d41dd122
SH		 4888{
4889 /*
4890 * the device should be disconnected from our LCU structure
4891 * on restore we will reconnect it and reread LCU specific
4892 * information like PAV support that might have changed
4893 */
4894 dasd_alias_remove_device(device);
4895 dasd_alias_disconnect_device_from_lcu(device);
4896
4897 return 0;
4898}
4899
501183f2 4900static int dasd_eckd_restore_device(struct dasd_device *device)
d41dd122 4901{
543691a4 4902 struct dasd_eckd_private *private = device->private;
6fca97a9 4903 struct dasd_eckd_characteristics temp_rdc_data;
f9f8d02f 4904 int rc;
d41dd122 4905 struct dasd_uid temp_uid;
a7602f6c 4906 unsigned long flags;
ea4da6ea 4907 unsigned long cqr_flags = 0;
d41dd122 4908
d41dd122 4909 /* Read Configuration Data */
251afd69
SH		 4910 rc = dasd_eckd_read_conf(device);
4911 if (rc) {
4912 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
4913 "Read configuration data failed, rc=%d", rc);
4914 goto out_err;
4915 }
d41dd122 4916
2dedf0d9
SH		 4917 dasd_eckd_get_uid(device, &temp_uid);
4918 /* Generate device unique id */
4919 rc = dasd_eckd_generate_uid(device);
4920 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
d41dd122 4921 if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0)
a7602f6c
SH		 4922 dev_err(&device->cdev->dev, "The UID of the DASD has "
4923 "changed\n");
2dedf0d9 4924 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
d41dd122
SH		 4925 if (rc)
4926 goto out_err;
d41dd122
SH		 4927
4928 /* register lcu with alias handling, enable PAV if this is a new lcu */
f9f8d02f
SH		 4929 rc = dasd_alias_make_device_known_to_lcu(device);
4930 if (rc)
251afd69 4931 goto out_err;
ea4da6ea
SH		 4932
4933 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags);
4934 dasd_eckd_validate_server(device, cqr_flags);
f4ac1d02
SW		 4935
4936 /* RE-Read Configuration Data */
251afd69
SH		 4937 rc = dasd_eckd_read_conf(device);
4938 if (rc) {
4939 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
4940 "Read configuration data failed, rc=%d", rc);
4941 goto out_err2;
4942 }
d41dd122
SH		 4943
4944 /* Read Feature Codes */
68d1e5f0 4945 dasd_eckd_read_features(device);
d41dd122
SH		 4946
4947 /* Read Device Characteristics */
68b781fe 4948 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
6fca97a9 4949 &temp_rdc_data, 64);
d41dd122 4950 if (rc) {
b8ed5dd5
SH		 4951 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
4952 "Read device characteristic failed, rc=%d", rc);
251afd69 4953 goto out_err2;
d41dd122 4954 }
a7602f6c 4955 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
6fca97a9 4956 memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data));
a7602f6c 4957 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
d41dd122
SH		 4958
4959 /* add device to alias management */
4960 dasd_alias_add_device(device);
4961
4962 return 0;
4963
251afd69
SH		 4964out_err2:
4965 dasd_alias_disconnect_device_from_lcu(device);
d41dd122 4966out_err:
e6125fba 4967 return -1;
d41dd122
SH		 4968}
4969
501183f2
SH		 4970static int dasd_eckd_reload_device(struct dasd_device *device)
4971{
543691a4 4972 struct dasd_eckd_private *private = device->private;
501183f2 4973 int rc, old_base;
2dedf0d9
SH		 4974 char print_uid[60];
4975 struct dasd_uid uid;
4976 unsigned long flags;
501183f2 4977
59a9ed5f
SH		 4978 /*
4979 * remove device from alias handling to prevent new requests
4980 * from being scheduled on the wrong alias device
4981 */
4982 dasd_alias_remove_device(device);
4983
2dedf0d9 4984 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
501183f2 4985 old_base = private->uid.base_unit_addr;
2dedf0d9
SH		 4986 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
4987
501183f2
SH		 4988 /* Read Configuration Data */
4989 rc = dasd_eckd_read_conf(device);
4990 if (rc)
4991 goto out_err;
4992
2dedf0d9 4993 rc = dasd_eckd_generate_uid(device);
501183f2
SH		 4994 if (rc)
4995 goto out_err;
501183f2
SH		 4996 /*
4997 * update unit address configuration and
4998 * add device to alias management
4999 */
5000 dasd_alias_update_add_device(device);
5001
2dedf0d9
SH		 5002 dasd_eckd_get_uid(device, &uid);
5003
5004 if (old_base != uid.base_unit_addr) {
5005 if (strlen(uid.vduit) > 0)
5006 snprintf(print_uid, sizeof(print_uid),
5007 "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial,
5008 uid.ssid, uid.base_unit_addr, uid.vduit);
501183f2 5009 else
2dedf0d9
SH		 5010 snprintf(print_uid, sizeof(print_uid),
5011 "%s.%s.%04x.%02x", uid.vendor, uid.serial,
5012 uid.ssid, uid.base_unit_addr);
501183f2
SH		 5013
5014 dev_info(&device->cdev->dev,
5015 "An Alias device was reassigned to a new base device "
2dedf0d9 5016 "with UID: %s\n", print_uid);
501183f2
SH		 5017 }
5018 return 0;
5019
5020out_err:
5021 return -1;
5022}
5023
5db8440c
SH		 5024static int dasd_eckd_read_message_buffer(struct dasd_device *device,
5025 struct dasd_rssd_messages *messages,
5026 __u8 lpum)
5027{
5028 struct dasd_rssd_messages *message_buf;
5029 struct dasd_psf_prssd_data *prssdp;
5db8440c
SH		 5030 struct dasd_ccw_req *cqr;
5031 struct ccw1 *ccw;
5032 int rc;
5033
5db8440c
SH		 5034 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
5035 (sizeof(struct dasd_psf_prssd_data) +
5036 sizeof(struct dasd_rssd_messages)),
c5205f2f 5037 device, NULL);
5db8440c
SH		 5038 if (IS_ERR(cqr)) {
5039 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
5040 "Could not allocate read message buffer request");
5041 return PTR_ERR(cqr);
5042 }
5043
af775210
SH		 5044 cqr->lpm = lpum;
5045retry:
5db8440c
SH		 5046 cqr->startdev = device;
5047 cqr->memdev = device;
5048 cqr->block = NULL;
5db8440c 5049 cqr->expires = 10 * HZ;
5db8440c 5050 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags);
b179b037
SH		 5051 /* dasd_sleep_on_immediatly does not do complex error
5052 * recovery so clear erp flag and set retry counter to
5053 * do basic erp */
5054 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
5055 cqr->retries = 256;
5db8440c
SH		 5056
5057 /* Prepare for Read Subsystem Data */
5058 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
5059 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
5060 prssdp->order = PSF_ORDER_PRSSD;
5061 prssdp->suborder = 0x03; /* Message Buffer */
5062 /* all other bytes of prssdp must be zero */
5063
5064 ccw = cqr->cpaddr;
5065 ccw->cmd_code = DASD_ECKD_CCW_PSF;
5066 ccw->count = sizeof(struct dasd_psf_prssd_data);
5067 ccw->flags |= CCW_FLAG_CC;
5068 ccw->flags |= CCW_FLAG_SLI;
5069 ccw->cda = (__u32)(addr_t) prssdp;
5070
5071 /* Read Subsystem Data - message buffer */
5072 message_buf = (struct dasd_rssd_messages *) (prssdp + 1);
5073 memset(message_buf, 0, sizeof(struct dasd_rssd_messages));
5074
5075 ccw++;
5076 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
5077 ccw->count = sizeof(struct dasd_rssd_messages);
5078 ccw->flags |= CCW_FLAG_SLI;
5079 ccw->cda = (__u32)(addr_t) message_buf;
5080
5081 cqr->buildclk = get_tod_clock();
5082 cqr->status = DASD_CQR_FILLED;
5083 rc = dasd_sleep_on_immediatly(cqr);
5084 if (rc == 0) {
5085 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
5086 message_buf = (struct dasd_rssd_messages *)
5087 (prssdp + 1);
5088 memcpy(messages, message_buf,
5089 sizeof(struct dasd_rssd_messages));
af775210
SH		 5090 } else if (cqr->lpm) {
5091 /*
5092 * on z/VM we might not be able to do I/O on the requested path
5093 * but instead we get the required information on any path
5094 * so retry with open path mask
5095 */
5096 cqr->lpm = 0;
5097 goto retry;
5db8440c
SH		 5098 } else
5099 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
5100 "Reading messages failed with rc=%d\n"
5101 , rc);
5102 dasd_sfree_request(cqr, cqr->memdev);
5103 return rc;
5104}
5105
5a3b7b11
SH		 5106static int dasd_eckd_query_host_access(struct dasd_device *device,
5107 struct dasd_psf_query_host_access *data)
5108{
5109 struct dasd_eckd_private *private = device->private;
5110 struct dasd_psf_query_host_access *host_access;
5111 struct dasd_psf_prssd_data *prssdp;
5112 struct dasd_ccw_req *cqr;
5113 struct ccw1 *ccw;
5114 int rc;
5115
5116 /* not available for HYPER PAV alias devices */
5117 if (!device->block && private->lcu->pav == HYPER_PAV)
5118 return -EOPNOTSUPP;
5119
ccd53fa2
SH		 5120 /* may not be supported by the storage server */
5121 if (!(private->features.feature[14] & 0x80))
5122 return -EOPNOTSUPP;
5123
5a3b7b11
SH		 5124 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
5125 sizeof(struct dasd_psf_prssd_data) + 1,
c5205f2f 5126 device, NULL);
5a3b7b11
SH		 5127 if (IS_ERR(cqr)) {
5128 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
5129 "Could not allocate read message buffer request");
5130 return PTR_ERR(cqr);
5131 }
5132 host_access = kzalloc(sizeof(*host_access), GFP_KERNEL | GFP_DMA);
5133 if (!host_access) {
5134 dasd_sfree_request(cqr, device);
5135 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
5136 "Could not allocate host_access buffer");
5137 return -ENOMEM;
5138 }
5139 cqr->startdev = device;
5140 cqr->memdev = device;
5141 cqr->block = NULL;
5142 cqr->retries = 256;
5143 cqr->expires = 10 * HZ;
5144
5145 /* Prepare for Read Subsystem Data */
5146 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
5147 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
5148 prssdp->order = PSF_ORDER_PRSSD;
5149 prssdp->suborder = PSF_SUBORDER_QHA; /* query host access */
5150 /* LSS and Volume that will be queried */
5151 prssdp->lss = private->ned->ID;
5152 prssdp->volume = private->ned->unit_addr;
5153 /* all other bytes of prssdp must be zero */
5154
5155 ccw = cqr->cpaddr;
5156 ccw->cmd_code = DASD_ECKD_CCW_PSF;
5157 ccw->count = sizeof(struct dasd_psf_prssd_data);
5158 ccw->flags |= CCW_FLAG_CC;
5159 ccw->flags |= CCW_FLAG_SLI;
5160 ccw->cda = (__u32)(addr_t) prssdp;
5161
5162 /* Read Subsystem Data - query host access */
5163 ccw++;
5164 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
5165 ccw->count = sizeof(struct dasd_psf_query_host_access);
5166 ccw->flags |= CCW_FLAG_SLI;
5167 ccw->cda = (__u32)(addr_t) host_access;
5168
5169 cqr->buildclk = get_tod_clock();
5170 cqr->status = DASD_CQR_FILLED;
ab24fbd3
SH		 5171 /* the command might not be supported, suppress error message */
5172 __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags);
f50af850 5173 rc = dasd_sleep_on_interruptible(cqr);
5a3b7b11
SH		 5174 if (rc == 0) {
5175 *data = *host_access;
5176 } else {
5177 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
5178 "Reading host access data failed with rc=%d\n",
5179 rc);
5180 rc = -EOPNOTSUPP;
5181 }
5182
5183 dasd_sfree_request(cqr, cqr->memdev);
5184 kfree(host_access);
5185 return rc;
5186}
5187/*
5188 * return number of grouped devices
5189 */
5190static int dasd_eckd_host_access_count(struct dasd_device *device)
5191{
5192 struct dasd_psf_query_host_access *access;
5193 struct dasd_ckd_path_group_entry *entry;
5194 struct dasd_ckd_host_information *info;
5195 int count = 0;
5196 int rc, i;
5197
5198 access = kzalloc(sizeof(*access), GFP_NOIO);
5199 if (!access) {
5200 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
5201 "Could not allocate access buffer");
5202 return -ENOMEM;
5203 }
5204 rc = dasd_eckd_query_host_access(device, access);
5205 if (rc) {
5206 kfree(access);
5207 return rc;
5208 }
5209
5210 info = (struct dasd_ckd_host_information *)
5211 access->host_access_information;
5212 for (i = 0; i < info->entry_count; i++) {
5213 entry = (struct dasd_ckd_path_group_entry *)
5214 (info->entry + i * info->entry_size);
5215 if (entry->status_flags & DASD_ECKD_PG_GROUPED)
5216 count++;
5217 }
5218
5219 kfree(access);
5220 return count;
5221}
5222
5223/*
5224 * write host access information to a sequential file
5225 */
5226static int dasd_hosts_print(struct dasd_device *device, struct seq_file *m)
5227{
5228 struct dasd_psf_query_host_access *access;
5229 struct dasd_ckd_path_group_entry *entry;
5230 struct dasd_ckd_host_information *info;
5231 char sysplex[9] = "";
c7848e14 5232 int rc, i;
5a3b7b11
SH		 5233
5234 access = kzalloc(sizeof(*access), GFP_NOIO);
5235 if (!access) {
5236 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
5237 "Could not allocate access buffer");
5238 return -ENOMEM;
5239 }
5240 rc = dasd_eckd_query_host_access(device, access);
5241 if (rc) {
5242 kfree(access);
5243 return rc;
5244 }
5245
5246 info = (struct dasd_ckd_host_information *)
5247 access->host_access_information;
5248 for (i = 0; i < info->entry_count; i++) {
5249 entry = (struct dasd_ckd_path_group_entry *)
5250 (info->entry + i * info->entry_size);
5251 /* PGID */
c7848e14 5252 seq_printf(m, "pgid %*phN\n", 11, entry->pgid);
5a3b7b11
SH		 5253 /* FLAGS */
5254 seq_printf(m, "status_flags %02x\n", entry->status_flags);
5255 /* SYSPLEX NAME */
5256 memcpy(&sysplex, &entry->sysplex_name, sizeof(sysplex) - 1);
5257 EBCASC(sysplex, sizeof(sysplex));
5258 seq_printf(m, "sysplex_name %8s\n", sysplex);
5259 /* SUPPORTED CYLINDER */
5260 seq_printf(m, "supported_cylinder %d\n", entry->cylinder);
5261 /* TIMESTAMP */
5262 seq_printf(m, "timestamp %lu\n", (unsigned long)
5263 entry->timestamp);
5264 }
5265 kfree(access);
5266
5267 return 0;
5268}
5269
5db8440c
SH		 5270/*
5271 * Perform Subsystem Function - CUIR response
5272 */
5273static int
5274dasd_eckd_psf_cuir_response(struct dasd_device *device, int response,
a521b048 5275 __u32 message_id, __u8 lpum)
5db8440c
SH		 5276{
5277 struct dasd_psf_cuir_response *psf_cuir;
a521b048 5278 int pos = pathmask_to_pos(lpum);
5db8440c
SH		 5279 struct dasd_ccw_req *cqr;
5280 struct ccw1 *ccw;
5281 int rc;
5282
5283 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ ,
c5205f2f
SO		 5284 sizeof(struct dasd_psf_cuir_response),
5285 device, NULL);
5db8440c
SH		 5286
5287 if (IS_ERR(cqr)) {
5288 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
5289 "Could not allocate PSF-CUIR request");
5290 return PTR_ERR(cqr);
5291 }
5292
5293 psf_cuir = (struct dasd_psf_cuir_response *)cqr->data;
5294 psf_cuir->order = PSF_ORDER_CUIR_RESPONSE;
5295 psf_cuir->cc = response;
a521b048 5296 psf_cuir->chpid = device->path[pos].chpid;
5db8440c 5297 psf_cuir->message_id = message_id;
a521b048
SH		 5298 psf_cuir->cssid = device->path[pos].cssid;
5299 psf_cuir->ssid = device->path[pos].ssid;
5db8440c
SH		 5300 ccw = cqr->cpaddr;
5301 ccw->cmd_code = DASD_ECKD_CCW_PSF;
5302 ccw->cda = (__u32)(addr_t)psf_cuir;
b179b037 5303 ccw->flags = CCW_FLAG_SLI;
5db8440c
SH		 5304 ccw->count = sizeof(struct dasd_psf_cuir_response);
5305
5306 cqr->startdev = device;
5307 cqr->memdev = device;
5308 cqr->block = NULL;
5309 cqr->retries = 256;
5310 cqr->expires = 10*HZ;
5311 cqr->buildclk = get_tod_clock();
5312 cqr->status = DASD_CQR_FILLED;
b179b037 5313 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags);
5db8440c
SH		 5314
5315 rc = dasd_sleep_on(cqr);
5316
5317 dasd_sfree_request(cqr, cqr->memdev);
5318 return rc;
5319}
5320
b179b037
SH		 5321/*
5322 * return configuration data that is referenced by record selector
5323 * if a record selector is specified or per default return the
5324 * conf_data pointer for the path specified by lpum
5325 */
5326static struct dasd_conf_data *dasd_eckd_get_ref_conf(struct dasd_device *device,
5327 __u8 lpum,
5328 struct dasd_cuir_message *cuir)
5db8440c 5329{
b179b037
SH		 5330 struct dasd_conf_data *conf_data;
5331 int path, pos;
5db8440c 5332
b179b037
SH		 5333 if (cuir->record_selector == 0)
5334 goto out;
5335 for (path = 0x80, pos = 0; path; path >>= 1, pos++) {
c9346151 5336 conf_data = device->path[pos].conf_data;
b179b037
SH		 5337 if (conf_data->gneq.record_selector ==
5338 cuir->record_selector)
5339 return conf_data;
5db8440c 5340 }
b179b037 5341out:
c9346151 5342 return device->path[pathmask_to_pos(lpum)].conf_data;
5db8440c
SH		 5343}
5344
5345/*
b179b037
SH		 5346 * This function determines the scope of a reconfiguration request by
5347 * analysing the path and device selection data provided in the CUIR request.
5348 * Returns a path mask containing CUIR affected paths for the give device.
5349 *
5350 * If the CUIR request does not contain the required information return the
5351 * path mask of the path the attention message for the CUIR request was reveived
5352 * on.
5353 */
5354static int dasd_eckd_cuir_scope(struct dasd_device *device, __u8 lpum,
5355 struct dasd_cuir_message *cuir)
5356{
5357 struct dasd_conf_data *ref_conf_data;
5358 unsigned long bitmask = 0, mask = 0;
b179b037
SH		 5359 struct dasd_conf_data *conf_data;
5360 unsigned int pos, path;
5361 char *ref_gneq, *gneq;
5362 char *ref_ned, *ned;
5363 int tbcpm = 0;
5364
5365 /* if CUIR request does not specify the scope use the path
5366 the attention message was presented on */
5367 if (!cuir->ned_map ||
5368 !(cuir->neq_map[0] | cuir->neq_map[1] | cuir->neq_map[2]))
5369 return lpum;
5370
b179b037
SH		 5371 /* get reference conf data */
5372 ref_conf_data = dasd_eckd_get_ref_conf(device, lpum, cuir);
5373 /* reference ned is determined by ned_map field */
5374 pos = 8 - ffs(cuir->ned_map);
5375 ref_ned = (char *)&ref_conf_data->neds[pos];
5376 ref_gneq = (char *)&ref_conf_data->gneq;
5377 /* transfer 24 bit neq_map to mask */
5378 mask = cuir->neq_map[2];
5379 mask |= cuir->neq_map[1] << 8;
5380 mask |= cuir->neq_map[0] << 16;
5381
c9346151 5382 for (path = 0; path < 8; path++) {
b179b037
SH		 5383 /* initialise data per path */
5384 bitmask = mask;
c9346151 5385 conf_data = device->path[path].conf_data;
b179b037
SH		 5386 pos = 8 - ffs(cuir->ned_map);
5387 ned = (char *) &conf_data->neds[pos];
5388 /* compare reference ned and per path ned */
5389 if (memcmp(ref_ned, ned, sizeof(*ned)) != 0)
5390 continue;
5391 gneq = (char *)&conf_data->gneq;
5392 /* compare reference gneq and per_path gneq under
5393 24 bit mask where mask bit 0 equals byte 7 of
5394 the gneq and mask bit 24 equals byte 31 */
5395 while (bitmask) {
5396 pos = ffs(bitmask) - 1;
5397 if (memcmp(&ref_gneq[31 - pos], &gneq[31 - pos], 1)
5398 != 0)
5399 break;
5400 clear_bit(pos, &bitmask);
5401 }
5402 if (bitmask)
5403 continue;
5404 /* device and path match the reference values
5405 add path to CUIR scope */
c9346151 5406 tbcpm |= 0x80 >> path;
b179b037
SH		 5407 }
5408 return tbcpm;
5409}
5410
5411static void dasd_eckd_cuir_notify_user(struct dasd_device *device,
a521b048 5412 unsigned long paths, int action)
b179b037 5413{
b179b037
SH		 5414 int pos;
5415
5416 while (paths) {
5417 /* get position of bit in mask */
a521b048 5418 pos = 8 - ffs(paths);
b179b037 5419 /* get channel path descriptor from this position */
b179b037 5420 if (action == CUIR_QUIESCE)
a521b048
SH		 5421 pr_warn("Service on the storage server caused path %x.%02x to go offline",
5422 device->path[pos].cssid,
5423 device->path[pos].chpid);
b179b037 5424 else if (action == CUIR_RESUME)
a521b048
SH		 5425 pr_info("Path %x.%02x is back online after service on the storage server",
5426 device->path[pos].cssid,
5427 device->path[pos].chpid);
5428 clear_bit(7 - pos, &paths);
b179b037
SH		 5429 }
5430}
5431
5432static int dasd_eckd_cuir_remove_path(struct dasd_device *device, __u8 lpum,
5433 struct dasd_cuir_message *cuir)
5434{
5435 unsigned long tbcpm;
5436
5437 tbcpm = dasd_eckd_cuir_scope(device, lpum, cuir);
5438 /* nothing to do if path is not in use */
c9346151 5439 if (!(dasd_path_get_opm(device) & tbcpm))
b179b037 5440 return 0;
c9346151 5441 if (!(dasd_path_get_opm(device) & ~tbcpm)) {
b179b037
SH		 5442 /* no path would be left if the CUIR action is taken
5443 return error */
5444 return -EINVAL;
5445 }
5446 /* remove device from operational path mask */
c9346151
SH		 5447 dasd_path_remove_opm(device, tbcpm);
5448 dasd_path_add_cuirpm(device, tbcpm);
b179b037
SH		 5449 return tbcpm;
5450}
5451
5452/*
5453 * walk through all devices and build a path mask to quiesce them
5454 * return an error if the last path to a device would be removed
5db8440c
SH		 5455 *
5456 * if only part of the devices are quiesced and an error
5457 * occurs no onlining necessary, the storage server will
5458 * notify the already set offline devices again
5459 */
5460static int dasd_eckd_cuir_quiesce(struct dasd_device *device, __u8 lpum,
b179b037 5461 struct dasd_cuir_message *cuir)
5db8440c 5462{
543691a4 5463 struct dasd_eckd_private *private = device->private;
5db8440c 5464 struct alias_pav_group *pavgroup, *tempgroup;
5db8440c 5465 struct dasd_device *dev, *n;
b179b037
SH		 5466 unsigned long paths = 0;
5467 unsigned long flags;
5468 int tbcpm;
5db8440c 5469
5db8440c 5470 /* active devices */
b179b037 5471 list_for_each_entry_safe(dev, n, &private->lcu->active_devices,
5db8440c 5472 alias_list) {
b179b037
SH		 5473 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
5474 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
5475 spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags);
5476 if (tbcpm < 0)
5477 goto out_err;
5478 paths |= tbcpm;
5db8440c 5479 }
5db8440c 5480 /* inactive devices */
b179b037 5481 list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices,
5db8440c 5482 alias_list) {
b179b037
SH		 5483 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
5484 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
5485 spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags);
5486 if (tbcpm < 0)
5487 goto out_err;
5488 paths |= tbcpm;
5db8440c 5489 }
5db8440c
SH		 5490 /* devices in PAV groups */
5491 list_for_each_entry_safe(pavgroup, tempgroup,
5492 &private->lcu->grouplist, group) {
5493 list_for_each_entry_safe(dev, n, &pavgroup->baselist,
5494 alias_list) {
b179b037
SH		 5495 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
5496 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
5497 spin_unlock_irqrestore(
5498 get_ccwdev_lock(dev->cdev), flags);
5499 if (tbcpm < 0)
5500 goto out_err;
5501 paths |= tbcpm;
5db8440c
SH		 5502 }
5503 list_for_each_entry_safe(dev, n, &pavgroup->aliaslist,
5504 alias_list) {
b179b037
SH		 5505 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
5506 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
5507 spin_unlock_irqrestore(
5508 get_ccwdev_lock(dev->cdev), flags);
5509 if (tbcpm < 0)
5510 goto out_err;
5511 paths |= tbcpm;
5db8440c
SH		 5512 }
5513 }
b179b037 5514 /* notify user about all paths affected by CUIR action */
a521b048 5515 dasd_eckd_cuir_notify_user(device, paths, CUIR_QUIESCE);
b179b037
SH		 5516 return 0;
5517out_err:
5518 return tbcpm;
5db8440c
SH		 5519}
5520
5521static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum,
b179b037 5522 struct dasd_cuir_message *cuir)
5db8440c 5523{
543691a4 5524 struct dasd_eckd_private *private = device->private;
5db8440c 5525 struct alias_pav_group *pavgroup, *tempgroup;
5db8440c 5526 struct dasd_device *dev, *n;
b179b037
SH		 5527 unsigned long paths = 0;
5528 int tbcpm;
5db8440c 5529
5db8440c
SH		 5530 /*
5531 * the path may have been added through a generic path event before
5532 * only trigger path verification if the path is not already in use
5533 */
5db8440c
SH		 5534 list_for_each_entry_safe(dev, n,
5535 &private->lcu->active_devices,
5536 alias_list) {
b179b037
SH		 5537 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
5538 paths |= tbcpm;
c9346151
SH		 5539 if (!(dasd_path_get_opm(dev) & tbcpm)) {
5540 dasd_path_add_tbvpm(dev, tbcpm);
5db8440c
SH		 5541 dasd_schedule_device_bh(dev);
5542 }
5543 }
5db8440c
SH		 5544 list_for_each_entry_safe(dev, n,
5545 &private->lcu->inactive_devices,
5546 alias_list) {
b179b037
SH		 5547 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
5548 paths |= tbcpm;
c9346151
SH		 5549 if (!(dasd_path_get_opm(dev) & tbcpm)) {
5550 dasd_path_add_tbvpm(dev, tbcpm);
5db8440c
SH		 5551 dasd_schedule_device_bh(dev);
5552 }
5553 }
5db8440c
SH		 5554 /* devices in PAV groups */
5555 list_for_each_entry_safe(pavgroup, tempgroup,
5556 &private->lcu->grouplist,
5557 group) {
5558 list_for_each_entry_safe(dev, n,
5559 &pavgroup->baselist,
5560 alias_list) {
b179b037
SH		 5561 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
5562 paths |= tbcpm;
c9346151
SH		 5563 if (!(dasd_path_get_opm(dev) & tbcpm)) {
5564 dasd_path_add_tbvpm(dev, tbcpm);
5db8440c
SH		 5565 dasd_schedule_device_bh(dev);
5566 }
5567 }
5568 list_for_each_entry_safe(dev, n,
5569 &pavgroup->aliaslist,
5570 alias_list) {
b179b037
SH		 5571 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
5572 paths |= tbcpm;
c9346151
SH		 5573 if (!(dasd_path_get_opm(dev) & tbcpm)) {
5574 dasd_path_add_tbvpm(dev, tbcpm);
5db8440c
SH		 5575 dasd_schedule_device_bh(dev);
5576 }
5577 }
5578 }
b179b037 5579 /* notify user about all paths affected by CUIR action */
a521b048 5580 dasd_eckd_cuir_notify_user(device, paths, CUIR_RESUME);
b179b037 5581 return 0;
5db8440c
SH		 5582}
5583
5584static void dasd_eckd_handle_cuir(struct dasd_device *device, void *messages,
5585 __u8 lpum)
5586{
5587 struct dasd_cuir_message *cuir = messages;
a521b048 5588 int response;
5db8440c 5589
b179b037
SH		 5590 DBF_DEV_EVENT(DBF_WARNING, device,
5591 "CUIR request: %016llx %016llx %016llx %08x",
5592 ((u64 *)cuir)[0], ((u64 *)cuir)[1], ((u64 *)cuir)[2],
5593 ((u32 *)cuir)[3]);
5db8440c
SH		 5594
5595 if (cuir->code == CUIR_QUIESCE) {
5596 /* quiesce */
a521b048 5597 if (dasd_eckd_cuir_quiesce(device, lpum, cuir))
b179b037
SH		 5598 response = PSF_CUIR_LAST_PATH;
5599 else
5600 response = PSF_CUIR_COMPLETED;
5db8440c
SH		 5601 } else if (cuir->code == CUIR_RESUME) {
5602 /* resume */
a521b048 5603 dasd_eckd_cuir_resume(device, lpum, cuir);
b179b037 5604 response = PSF_CUIR_COMPLETED;
5db8440c
SH		 5605 } else
5606 response = PSF_CUIR_NOT_SUPPORTED;
5607
b179b037 5608 dasd_eckd_psf_cuir_response(device, response,
a521b048 5609 cuir->message_id, lpum);
b179b037
SH		 5610 DBF_DEV_EVENT(DBF_WARNING, device,
5611 "CUIR response: %d on message ID %08x", response,
5612 cuir->message_id);
b179b037
SH		 5613 /* to make sure there is no attention left schedule work again */
5614 device->discipline->check_attention(device, lpum);
5db8440c
SH		 5615}
5616
5617static void dasd_eckd_check_attention_work(struct work_struct *work)
5618{
5619 struct check_attention_work_data *data;
5620 struct dasd_rssd_messages *messages;
5621 struct dasd_device *device;
5622 int rc;
5623
5624 data = container_of(work, struct check_attention_work_data, worker);
5625 device = data->device;
5db8440c
SH		 5626 messages = kzalloc(sizeof(*messages), GFP_KERNEL);
5627 if (!messages) {
5628 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
5629 "Could not allocate attention message buffer");
5630 goto out;
5631 }
5db8440c
SH		 5632 rc = dasd_eckd_read_message_buffer(device, messages, data->lpum);
5633 if (rc)
5634 goto out;
5db8440c
SH		 5635 if (messages->length == ATTENTION_LENGTH_CUIR &&
5636 messages->format == ATTENTION_FORMAT_CUIR)
5637 dasd_eckd_handle_cuir(device, messages, data->lpum);
5db8440c
SH		 5638out:
5639 dasd_put_device(device);
5640 kfree(messages);
5641 kfree(data);
5642}
5643
5644static int dasd_eckd_check_attention(struct dasd_device *device, __u8 lpum)
5645{
5646 struct check_attention_work_data *data;
5647
5648 data = kzalloc(sizeof(*data), GFP_ATOMIC);
5649 if (!data)
5650 return -ENOMEM;
5651 INIT_WORK(&data->worker, dasd_eckd_check_attention_work);
5652 dasd_get_device(device);
5653 data->device = device;
5654 data->lpum = lpum;
5655 schedule_work(&data->worker);
5656 return 0;
5657}
5658
a521b048
SH		 5659static int dasd_eckd_disable_hpf_path(struct dasd_device *device, __u8 lpum)
5660{
5661 if (~lpum & dasd_path_get_opm(device)) {
5662 dasd_path_add_nohpfpm(device, lpum);
5663 dasd_path_remove_opm(device, lpum);
5664 dev_err(&device->cdev->dev,
5665 "Channel path %02X lost HPF functionality and is disabled\n",
5666 lpum);
5667 return 1;
5668 }
5669 return 0;
5670}
5671
5672static void dasd_eckd_disable_hpf_device(struct dasd_device *device)
5673{
5674 struct dasd_eckd_private *private = device->private;
5675
5676 dev_err(&device->cdev->dev,
5677 "High Performance FICON disabled\n");
5678 private->fcx_max_data = 0;
5679}
5680
5681static int dasd_eckd_hpf_enabled(struct dasd_device *device)
5682{
5683 struct dasd_eckd_private *private = device->private;
5684
5685 return private->fcx_max_data ? 1 : 0;
5686}
5687
5688static void dasd_eckd_handle_hpf_error(struct dasd_device *device,
5689 struct irb *irb)
5690{
5691 struct dasd_eckd_private *private = device->private;
5692
5693 if (!private->fcx_max_data) {
5694 /* sanity check for no HPF, the error makes no sense */
5695 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
5696 "Trying to disable HPF for a non HPF device");
5697 return;
5698 }
5699 if (irb->scsw.tm.sesq == SCSW_SESQ_DEV_NOFCX) {
5700 dasd_eckd_disable_hpf_device(device);
5701 } else if (irb->scsw.tm.sesq == SCSW_SESQ_PATH_NOFCX) {
5702 if (dasd_eckd_disable_hpf_path(device, irb->esw.esw1.lpum))
5703 return;
5704 dasd_eckd_disable_hpf_device(device);
5705 dasd_path_set_tbvpm(device,
5706 dasd_path_get_hpfpm(device));
5707 }
5708 /*
5709 * prevent that any new I/O ist started on the device and schedule a
5710 * requeue of existing requests
5711 */
5712 dasd_device_set_stop_bits(device, DASD_STOPPED_NOT_ACC);
5713 dasd_schedule_requeue(device);
5714}
5715
d41dd122 5716static struct ccw_driver dasd_eckd_driver = {
3bda058b
SO		 5717 .driver = {
5718 .name = "dasd-eckd",
5719 .owner = THIS_MODULE,
5720 },
d41dd122
SH		 5721 .ids = dasd_eckd_ids,
5722 .probe = dasd_eckd_probe,
5723 .remove = dasd_generic_remove,
5724 .set_offline = dasd_generic_set_offline,
5725 .set_online = dasd_eckd_set_online,
5726 .notify = dasd_generic_notify,
a4d26c6a 5727 .path_event = dasd_generic_path_event,
4679e893 5728 .shutdown = dasd_generic_shutdown,
d41dd122
SH		 5729 .freeze = dasd_generic_pm_freeze,
5730 .thaw = dasd_generic_restore_device,
5731 .restore = dasd_generic_restore_device,
a23ed009 5732 .uc_handler = dasd_generic_uc_handler,
420f42ec 5733 .int_class = IRQIO_DAS,
d41dd122 5734};
f3eb5384 5735
1da177e4
LT		 5736/*
5737 * max_blocks is dependent on the amount of storage that is available
5738 * in the static io buffer for each device. Currently each device has
5739 * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has
5740 * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use
5741 * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In
5742 * addition we have one define extent ccw + 16 bytes of data and one
5743 * locate record ccw + 16 bytes of data. That makes:
5744 * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum.
5745 * We want to fit two into the available memory so that we can immediately
5746 * start the next request if one finishes off. That makes 249.5 blocks
5747 * for one request. Give a little safety and the result is 240.
5748 */
5749static struct dasd_discipline dasd_eckd_discipline = {
5750 .owner = THIS_MODULE,
5751 .name = "ECKD",
5752 .ebcname = "ECKD",
ef19298b 5753 .max_blocks = 190,
1da177e4 5754 .check_device = dasd_eckd_check_characteristics,
8e09f215 5755 .uncheck_device = dasd_eckd_uncheck_device,
1da177e4 5756 .do_analysis = dasd_eckd_do_analysis,
a4d26c6a 5757 .verify_path = dasd_eckd_verify_path,
d42e1712 5758 .basic_to_ready = dasd_eckd_basic_to_ready,
8e09f215 5759 .online_to_ready = dasd_eckd_online_to_ready,
daa991bf 5760 .basic_to_known = dasd_eckd_basic_to_known,
1da177e4
LT		 5761 .fill_geometry = dasd_eckd_fill_geometry,
5762 .start_IO = dasd_start_IO,
5763 .term_IO = dasd_term_IO,
8e09f215 5764 .handle_terminated_request = dasd_eckd_handle_terminated_request,
1da177e4 5765 .format_device = dasd_eckd_format_device,
8fd57520 5766 .check_device_format = dasd_eckd_check_device_format,
1da177e4
LT		 5767 .erp_action = dasd_eckd_erp_action,
5768 .erp_postaction = dasd_eckd_erp_postaction,
5a27e60d 5769 .check_for_device_change = dasd_eckd_check_for_device_change,
8e09f215
SW		 5770 .build_cp = dasd_eckd_build_alias_cp,
5771 .free_cp = dasd_eckd_free_alias_cp,
1da177e4 5772 .dump_sense = dasd_eckd_dump_sense,
fc19f381 5773 .dump_sense_dbf = dasd_eckd_dump_sense_dbf,
1da177e4 5774 .fill_info = dasd_eckd_fill_info,
1107ccfb 5775 .ioctl = dasd_eckd_ioctl,
d41dd122
SH		 5776 .freeze = dasd_eckd_pm_freeze,
5777 .restore = dasd_eckd_restore_device,
501183f2 5778 .reload = dasd_eckd_reload_device,
2dedf0d9 5779 .get_uid = dasd_eckd_get_uid,
f1633031 5780 .kick_validate = dasd_eckd_kick_validate_server,
5db8440c 5781 .check_attention = dasd_eckd_check_attention,
5a3b7b11
SH		 5782 .host_access_count = dasd_eckd_host_access_count,
5783 .hosts_print = dasd_hosts_print,
a521b048
SH		 5784 .handle_hpf_error = dasd_eckd_handle_hpf_error,
5785 .disable_hpf = dasd_eckd_disable_hpf_device,
5786 .hpf_enabled = dasd_eckd_hpf_enabled,
5787 .reset_path = dasd_eckd_reset_path,
1da177e4
LT		 5788};
5789
5790static int __init
5791dasd_eckd_init(void)
5792{
736e6ea0
SO		 5793 int ret;
5794
1da177e4 5795 ASCEBC(dasd_eckd_discipline.ebcname, 4);
f932bcea
SW		 5796 dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req),
5797 GFP_KERNEL | GFP_DMA);
5798 if (!dasd_reserve_req)
5799 return -ENOMEM;
a4d26c6a
SW		 5800 path_verification_worker = kmalloc(sizeof(*path_verification_worker),
5801 GFP_KERNEL | GFP_DMA);
5802 if (!path_verification_worker) {
5803 kfree(dasd_reserve_req);
5804 return -ENOMEM;
5805 }
558b9ef0
SW		 5806 rawpadpage = (void *)__get_free_page(GFP_KERNEL);
5807 if (!rawpadpage) {
5808 kfree(path_verification_worker);
5809 kfree(dasd_reserve_req);
5810 return -ENOMEM;
5811 }
736e6ea0
SO		 5812 ret = ccw_driver_register(&dasd_eckd_driver);
5813 if (!ret)
5814 wait_for_device_probe();
a4d26c6a
SW		 5815 else {
5816 kfree(path_verification_worker);
f932bcea 5817 kfree(dasd_reserve_req);
558b9ef0 5818 free_page((unsigned long)rawpadpage);
a4d26c6a 5819 }
736e6ea0 5820 return ret;
1da177e4
LT		 5821}
5822
5823static void __exit
5824dasd_eckd_cleanup(void)
5825{
5826 ccw_driver_unregister(&dasd_eckd_driver);
a4d26c6a 5827 kfree(path_verification_worker);
f932bcea 5828 kfree(dasd_reserve_req);
558b9ef0 5829 free_page((unsigned long)rawpadpage);
1da177e4
LT		 5830}
5831
5832module_init(dasd_eckd_init);
5833module_exit(dasd_eckd_cleanup);
Linux 6.x block layer and io_uring tree(s)