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s390/dasd: fix command reject error on ESE devices
[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
9e12e54c
JH		 92static struct {
93 struct dasd_ccw_req cqr;
94 struct ccw1 ccw[2];
95 char data[40];
96} *dasd_vol_info_req;
97static DEFINE_MUTEX(dasd_vol_info_mutex);
98
99struct ext_pool_exhaust_work_data {
100 struct work_struct worker;
101 struct dasd_device *device;
102 struct dasd_device *base;
103};
104
a4d26c6a 105/* definitions for the path verification worker */
b7294932 106struct pe_handler_work_data {
a4d26c6a
SW		 107 struct work_struct worker;
108 struct dasd_device *device;
109 struct dasd_ccw_req cqr;
110 struct ccw1 ccw;
111 __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE];
112 int isglobal;
113 __u8 tbvpm;
4d063e64 114 __u8 fcsecpm;
a4d26c6a 115};
b7294932
JH		 116static struct pe_handler_work_data *pe_handler_worker;
117static DEFINE_MUTEX(dasd_pe_handler_mutex);
eb6e199b 118
5db8440c
SH		 119struct check_attention_work_data {
120 struct work_struct worker;
121 struct dasd_device *device;
122 __u8 lpum;
123};
124
c729696b 125static int dasd_eckd_ext_pool_id(struct dasd_device *);
8fd57520
JH		 126static int prepare_itcw(struct itcw *, unsigned int, unsigned int, int,
127 struct dasd_device *, struct dasd_device *,
128 unsigned int, int, unsigned int, unsigned int,
129 unsigned int, unsigned int);
c99bff34
SH		 130static int dasd_eckd_query_pprc_status(struct dasd_device *,
131 struct dasd_pprc_data_sc4 *);
8fd57520 132
1da177e4
LT		 133/* initial attempt at a probe function. this can be simplified once
134 * the other detection code is gone */
135static int
136dasd_eckd_probe (struct ccw_device *cdev)
137{
138 int ret;
139
40545573 140 /* set ECKD specific ccw-device options */
454e1fa1
PO		 141 ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE |
142 CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH);
40545573 143 if (ret) {
b8ed5dd5
SH		 144 DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s",
145 "dasd_eckd_probe: could not set "
146 "ccw-device options");
1da177e4 147 return ret;
40545573 148 }
e03c5941 149 ret = dasd_generic_probe(cdev);
40545573 150 return ret;
1da177e4
LT		 151}
152
153static int
154dasd_eckd_set_online(struct ccw_device *cdev)
155{
40545573 156 return dasd_generic_set_online(cdev, &dasd_eckd_discipline);
1da177e4
LT		 157}
158
1da177e4
LT		 159static const int sizes_trk0[] = { 28, 148, 84 };
160#define LABEL_SIZE 140
161
3bc9fef9 162/* head and record addresses of count_area read in analysis ccw */
ce6915f5 163static const int count_area_head[] = { 0, 0, 0, 0, 1 };
3bc9fef9
SH		 164static const int count_area_rec[] = { 1, 2, 3, 4, 1 };
165
1da177e4
LT		 166static inline unsigned int
167ceil_quot(unsigned int d1, unsigned int d2)
168{
169 return (d1 + (d2 - 1)) / d2;
170}
171
4d284cac 172static unsigned int
1da177e4
LT		 173recs_per_track(struct dasd_eckd_characteristics * rdc,
174 unsigned int kl, unsigned int dl)
175{
176 int dn, kn;
177
178 switch (rdc->dev_type) {
179 case 0x3380:
180 if (kl)
181 return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) +
182 ceil_quot(dl + 12, 32));
183 else
184 return 1499 / (15 + ceil_quot(dl + 12, 32));
185 case 0x3390:
186 dn = ceil_quot(dl + 6, 232) + 1;
187 if (kl) {
188 kn = ceil_quot(kl + 6, 232) + 1;
189 return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) +
190 9 + ceil_quot(dl + 6 * dn, 34));
191 } else
192 return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34));
193 case 0x9345:
194 dn = ceil_quot(dl + 6, 232) + 1;
195 if (kl) {
196 kn = ceil_quot(kl + 6, 232) + 1;
197 return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) +
198 ceil_quot(dl + 6 * dn, 34));
199 } else
200 return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34));
201 }
202 return 0;
203}
204
b44b0ab3
SW		 205static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head)
206{
207 geo->cyl = (__u16) cyl;
208 geo->head = cyl >> 16;
209 geo->head <<= 4;
210 geo->head |= head;
211}
212
5e6bdd37
SH		 213/*
214 * calculate failing track from sense data depending if
215 * it is an EAV device or not
216 */
217static int dasd_eckd_track_from_irb(struct irb *irb, struct dasd_device *device,
218 sector_t *track)
219{
220 struct dasd_eckd_private *private = device->private;
221 u8 *sense = NULL;
222 u32 cyl;
223 u8 head;
224
225 sense = dasd_get_sense(irb);
226 if (!sense) {
227 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
228 "ESE error no sense data\n");
229 return -EINVAL;
230 }
231 if (!(sense[27] & DASD_SENSE_BIT_2)) {
232 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
233 "ESE error no valid track data\n");
234 return -EINVAL;
235 }
236
237 if (sense[27] & DASD_SENSE_BIT_3) {
238 /* enhanced addressing */
239 cyl = sense[30] << 20;
240 cyl |= (sense[31] & 0xF0) << 12;
241 cyl |= sense[28] << 8;
242 cyl |= sense[29];
243 } else {
244 cyl = sense[29] << 8;
245 cyl |= sense[30];
246 }
247 head = sense[31] & 0x0F;
248 *track = cyl * private->rdc_data.trk_per_cyl + head;
249 return 0;
250}
251
5628683c 252static int set_timestamp(struct ccw1 *ccw, struct DE_eckd_data *data,
45f186be 253 struct dasd_device *device)
1da177e4 254{
543691a4 255 struct dasd_eckd_private *private = device->private;
d54853ef 256 int rc;
1da177e4 257
5628683c
SH		 258 rc = get_phys_clock(&data->ep_sys_time);
259 /*
260 * Ignore return code if XRC is not supported or
261 * sync clock is switched off
262 */
263 if ((rc && !private->rdc_data.facilities.XRC_supported) ||
264 rc == -EOPNOTSUPP || rc == -EACCES)
d54853ef 265 return 0;
1da177e4 266
45f186be 267 /* switch on System Time Stamp - needed for XRC Support */
d54853ef
MS		 268 data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */
269 data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */
1da177e4 270
45f186be
JH		 271 if (ccw) {
272 ccw->count = sizeof(struct DE_eckd_data);
273 ccw->flags |= CCW_FLAG_SLI;
274 }
275
d54853ef
MS		 276 return rc;
277}
1da177e4 278
4d284cac 279static int
b44b0ab3 280define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk,
45f186be
JH		 281 unsigned int totrk, int cmd, struct dasd_device *device,
282 int blksize)
1da177e4 283{
543691a4 284 struct dasd_eckd_private *private = device->private;
b44b0ab3 285 u16 heads, beghead, endhead;
45f186be 286 u32 begcyl, endcyl;
d54853ef 287 int rc = 0;
1da177e4 288
45f186be
JH		 289 if (ccw) {
290 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT;
291 ccw->flags = 0;
292 ccw->count = 16;
b87c52e4 293 ccw->cda = (__u32)virt_to_phys(data);
45f186be 294 }
1da177e4 295
8e09f215 296 memset(data, 0, sizeof(struct DE_eckd_data));
1da177e4
LT		 297 switch (cmd) {
298 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
299 case DASD_ECKD_CCW_READ_RECORD_ZERO:
300 case DASD_ECKD_CCW_READ:
301 case DASD_ECKD_CCW_READ_MT:
302 case DASD_ECKD_CCW_READ_CKD:
303 case DASD_ECKD_CCW_READ_CKD_MT:
304 case DASD_ECKD_CCW_READ_KD:
305 case DASD_ECKD_CCW_READ_KD_MT:
1da177e4
LT		 306 data->mask.perm = 0x1;
307 data->attributes.operation = private->attrib.operation;
308 break;
8fd57520
JH		 309 case DASD_ECKD_CCW_READ_COUNT:
310 data->mask.perm = 0x1;
311 data->attributes.operation = DASD_BYPASS_CACHE;
312 break;
45f186be
JH		 313 case DASD_ECKD_CCW_READ_TRACK:
314 case DASD_ECKD_CCW_READ_TRACK_DATA:
315 data->mask.perm = 0x1;
316 data->attributes.operation = private->attrib.operation;
317 data->blk_size = 0;
318 break;
1da177e4
LT		 319 case DASD_ECKD_CCW_WRITE:
320 case DASD_ECKD_CCW_WRITE_MT:
321 case DASD_ECKD_CCW_WRITE_KD:
322 case DASD_ECKD_CCW_WRITE_KD_MT:
323 data->mask.perm = 0x02;
324 data->attributes.operation = private->attrib.operation;
5628683c 325 rc = set_timestamp(ccw, data, device);
1da177e4
LT		 326 break;
327 case DASD_ECKD_CCW_WRITE_CKD:
328 case DASD_ECKD_CCW_WRITE_CKD_MT:
329 data->attributes.operation = DASD_BYPASS_CACHE;
5628683c 330 rc = set_timestamp(ccw, data, device);
1da177e4
LT		 331 break;
332 case DASD_ECKD_CCW_ERASE:
333 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
334 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
335 data->mask.perm = 0x3;
336 data->mask.auth = 0x1;
337 data->attributes.operation = DASD_BYPASS_CACHE;
5628683c 338 rc = set_timestamp(ccw, data, device);
45f186be
JH		 339 break;
340 case DASD_ECKD_CCW_WRITE_FULL_TRACK:
341 data->mask.perm = 0x03;
342 data->attributes.operation = private->attrib.operation;
343 data->blk_size = 0;
344 break;
345 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
346 data->mask.perm = 0x02;
347 data->attributes.operation = private->attrib.operation;
348 data->blk_size = blksize;
5628683c 349 rc = set_timestamp(ccw, data, device);
1da177e4
LT		 350 break;
351 default:
fc19f381
SH		 352 dev_err(&device->cdev->dev,
353 "0x%x is not a known command\n", cmd);
1da177e4
LT		 354 break;
355 }
356
357 data->attributes.mode = 0x3; /* ECKD */
358
359 if ((private->rdc_data.cu_type == 0x2105 ||
360 private->rdc_data.cu_type == 0x2107 ||
361 private->rdc_data.cu_type == 0x1750)
362 && !(private->uses_cdl && trk < 2))
363 data->ga_extended |= 0x40; /* Regular Data Format Mode */
364
b44b0ab3
SW		 365 heads = private->rdc_data.trk_per_cyl;
366 begcyl = trk / heads;
367 beghead = trk % heads;
368 endcyl = totrk / heads;
369 endhead = totrk % heads;
1da177e4
LT		 370
371 /* check for sequential prestage - enhance cylinder range */
372 if (data->attributes.operation == DASD_SEQ_PRESTAGE ||
373 data->attributes.operation == DASD_SEQ_ACCESS) {
138c014d 374
b44b0ab3
SW		 375 if (endcyl + private->attrib.nr_cyl < private->real_cyl)
376 endcyl += private->attrib.nr_cyl;
1da177e4 377 else
b44b0ab3 378 endcyl = (private->real_cyl - 1);
1da177e4
LT		 379 }
380
b44b0ab3
SW		 381 set_ch_t(&data->beg_ext, begcyl, beghead);
382 set_ch_t(&data->end_ext, endcyl, endhead);
d54853ef 383 return rc;
1da177e4
LT		 384}
385
8e09f215 386
45f186be
JH		 387static void locate_record_ext(struct ccw1 *ccw, struct LRE_eckd_data *data,
388 unsigned int trk, unsigned int rec_on_trk,
389 int count, int cmd, struct dasd_device *device,
390 unsigned int reclen, unsigned int tlf)
f3eb5384 391{
543691a4 392 struct dasd_eckd_private *private = device->private;
f3eb5384
SW		 393 int sector;
394 int dn, d;
395
45f186be
JH		 396 if (ccw) {
397 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD_EXT;
398 ccw->flags = 0;
399 if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK)
400 ccw->count = 22;
401 else
402 ccw->count = 20;
b87c52e4 403 ccw->cda = (__u32)virt_to_phys(data);
45f186be
JH		 404 }
405
f3eb5384
SW		 406 memset(data, 0, sizeof(*data));
407 sector = 0;
408 if (rec_on_trk) {
409 switch (private->rdc_data.dev_type) {
410 case 0x3390:
411 dn = ceil_quot(reclen + 6, 232);
412 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
413 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
414 break;
415 case 0x3380:
416 d = 7 + ceil_quot(reclen + 12, 32);
417 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
418 break;
419 }
420 }
421 data->sector = sector;
422 /* note: meaning of count depends on the operation
423 * for record based I/O it's the number of records, but for
424 * track based I/O it's the number of tracks
425 */
426 data->count = count;
427 switch (cmd) {
428 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
429 data->operation.orientation = 0x3;
430 data->operation.operation = 0x03;
431 break;
432 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
433 data->operation.orientation = 0x3;
434 data->operation.operation = 0x16;
435 break;
436 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
437 data->operation.orientation = 0x1;
438 data->operation.operation = 0x03;
439 data->count++;
440 break;
441 case DASD_ECKD_CCW_READ_RECORD_ZERO:
442 data->operation.orientation = 0x3;
443 data->operation.operation = 0x16;
444 data->count++;
445 break;
446 case DASD_ECKD_CCW_WRITE:
447 case DASD_ECKD_CCW_WRITE_MT:
448 case DASD_ECKD_CCW_WRITE_KD:
449 case DASD_ECKD_CCW_WRITE_KD_MT:
450 data->auxiliary.length_valid = 0x1;
451 data->length = reclen;
452 data->operation.operation = 0x01;
453 break;
454 case DASD_ECKD_CCW_WRITE_CKD:
455 case DASD_ECKD_CCW_WRITE_CKD_MT:
456 data->auxiliary.length_valid = 0x1;
457 data->length = reclen;
458 data->operation.operation = 0x03;
459 break;
e4dbb0f2
SH		 460 case DASD_ECKD_CCW_WRITE_FULL_TRACK:
461 data->operation.orientation = 0x0;
462 data->operation.operation = 0x3F;
463 data->extended_operation = 0x11;
464 data->length = 0;
465 data->extended_parameter_length = 0x02;
466 if (data->count > 8) {
467 data->extended_parameter[0] = 0xFF;
468 data->extended_parameter[1] = 0xFF;
469 data->extended_parameter[1] <<= (16 - count);
470 } else {
471 data->extended_parameter[0] = 0xFF;
472 data->extended_parameter[0] <<= (8 - count);
473 data->extended_parameter[1] = 0x00;
474 }
475 data->sector = 0xFF;
476 break;
f3eb5384
SW		 477 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
478 data->auxiliary.length_valid = 0x1;
479 data->length = reclen; /* not tlf, as one might think */
480 data->operation.operation = 0x3F;
481 data->extended_operation = 0x23;
482 break;
483 case DASD_ECKD_CCW_READ:
484 case DASD_ECKD_CCW_READ_MT:
485 case DASD_ECKD_CCW_READ_KD:
486 case DASD_ECKD_CCW_READ_KD_MT:
487 data->auxiliary.length_valid = 0x1;
488 data->length = reclen;
489 data->operation.operation = 0x06;
490 break;
491 case DASD_ECKD_CCW_READ_CKD:
492 case DASD_ECKD_CCW_READ_CKD_MT:
493 data->auxiliary.length_valid = 0x1;
494 data->length = reclen;
495 data->operation.operation = 0x16;
496 break;
497 case DASD_ECKD_CCW_READ_COUNT:
498 data->operation.operation = 0x06;
499 break;
e4dbb0f2
SH		 500 case DASD_ECKD_CCW_READ_TRACK:
501 data->operation.orientation = 0x1;
502 data->operation.operation = 0x0C;
503 data->extended_parameter_length = 0;
504 data->sector = 0xFF;
505 break;
f3eb5384
SW		 506 case DASD_ECKD_CCW_READ_TRACK_DATA:
507 data->auxiliary.length_valid = 0x1;
508 data->length = tlf;
509 data->operation.operation = 0x0C;
510 break;
511 case DASD_ECKD_CCW_ERASE:
512 data->length = reclen;
513 data->auxiliary.length_valid = 0x1;
514 data->operation.operation = 0x0b;
515 break;
516 default:
517 DBF_DEV_EVENT(DBF_ERR, device,
518 "fill LRE unknown opcode 0x%x", cmd);
519 BUG();
520 }
521 set_ch_t(&data->seek_addr,
522 trk / private->rdc_data.trk_per_cyl,
523 trk % private->rdc_data.trk_per_cyl);
524 data->search_arg.cyl = data->seek_addr.cyl;
525 data->search_arg.head = data->seek_addr.head;
526 data->search_arg.record = rec_on_trk;
527}
528
529static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
530 unsigned int trk, unsigned int totrk, int cmd,
531 struct dasd_device *basedev, struct dasd_device *startdev,
45f186be 532 unsigned int format, unsigned int rec_on_trk, int count,
f3eb5384 533 unsigned int blksize, unsigned int tlf)
8e09f215
SW		 534{
535 struct dasd_eckd_private *basepriv, *startpriv;
f3eb5384 536 struct LRE_eckd_data *lredata;
45f186be 537 struct DE_eckd_data *dedata;
8e09f215
SW		 538 int rc = 0;
539
543691a4
SO		 540 basepriv = basedev->private;
541 startpriv = startdev->private;
f3eb5384
SW		 542 dedata = &pfxdata->define_extent;
543 lredata = &pfxdata->locate_record;
8e09f215
SW		 544
545 ccw->cmd_code = DASD_ECKD_CCW_PFX;
546 ccw->flags = 0;
e4dbb0f2
SH		 547 if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) {
548 ccw->count = sizeof(*pfxdata) + 2;
b87c52e4 549 ccw->cda = (__u32)virt_to_phys(pfxdata);
e4dbb0f2
SH		 550 memset(pfxdata, 0, sizeof(*pfxdata) + 2);
551 } else {
552 ccw->count = sizeof(*pfxdata);
b87c52e4 553 ccw->cda = (__u32)virt_to_phys(pfxdata);
e4dbb0f2
SH		 554 memset(pfxdata, 0, sizeof(*pfxdata));
555 }
8e09f215 556
8e09f215 557 /* prefix data */
f3eb5384
SW		 558 if (format > 1) {
559 DBF_DEV_EVENT(DBF_ERR, basedev,
560 "PFX LRE unknown format 0x%x", format);
561 BUG();
562 return -EINVAL;
563 }
564 pfxdata->format = format;
542e30ce
SH		 565 pfxdata->base_address = basepriv->conf.ned->unit_addr;
566 pfxdata->base_lss = basepriv->conf.ned->ID;
f3eb5384 567 pfxdata->validity.define_extent = 1;
8e09f215
SW		 568
569 /* private uid is kept up to date, conf_data may be outdated */
da340f92 570 if (startpriv->uid.type == UA_BASE_PAV_ALIAS)
8e09f215 571 pfxdata->validity.verify_base = 1;
da340f92
SH		 572
573 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) {
574 pfxdata->validity.verify_base = 1;
575 pfxdata->validity.hyper_pav = 1;
8e09f215
SW		 576 }
577
45f186be 578 rc = define_extent(NULL, dedata, trk, totrk, cmd, basedev, blksize);
8e09f215 579
45f186be
JH		 580 /*
581 * For some commands the System Time Stamp is set in the define extent
582 * data when XRC is supported. The validity of the time stamp must be
583 * reflected in the prefix data as well.
584 */
585 if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02)
586 pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */
f3eb5384
SW		 587
588 if (format == 1) {
45f186be
JH		 589 locate_record_ext(NULL, lredata, trk, rec_on_trk, count, cmd,
590 basedev, blksize, tlf);
f3eb5384
SW		 591 }
592
8e09f215
SW		 593 return rc;
594}
595
f3eb5384
SW		 596static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
597 unsigned int trk, unsigned int totrk, int cmd,
598 struct dasd_device *basedev, struct dasd_device *startdev)
599{
600 return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev,
601 0, 0, 0, 0, 0);
602}
603
4d284cac 604static void
b44b0ab3
SW		 605locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk,
606 unsigned int rec_on_trk, int no_rec, int cmd,
1da177e4
LT		 607 struct dasd_device * device, int reclen)
608{
543691a4 609 struct dasd_eckd_private *private = device->private;
1da177e4
LT		 610 int sector;
611 int dn, d;
138c014d 612
1da177e4
LT		 613 DBF_DEV_EVENT(DBF_INFO, device,
614 "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d",
615 trk, rec_on_trk, no_rec, cmd, reclen);
616
617 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD;
618 ccw->flags = 0;
619 ccw->count = 16;
b87c52e4 620 ccw->cda = (__u32)virt_to_phys(data);
1da177e4 621
8e09f215 622 memset(data, 0, sizeof(struct LO_eckd_data));
1da177e4
LT		 623 sector = 0;
624 if (rec_on_trk) {
625 switch (private->rdc_data.dev_type) {
626 case 0x3390:
627 dn = ceil_quot(reclen + 6, 232);
628 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
629 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
630 break;
631 case 0x3380:
632 d = 7 + ceil_quot(reclen + 12, 32);
633 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
634 break;
635 }
636 }
637 data->sector = sector;
638 data->count = no_rec;
639 switch (cmd) {
640 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
641 data->operation.orientation = 0x3;
642 data->operation.operation = 0x03;
643 break;
644 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
645 data->operation.orientation = 0x3;
646 data->operation.operation = 0x16;
647 break;
648 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
649 data->operation.orientation = 0x1;
650 data->operation.operation = 0x03;
651 data->count++;
652 break;
653 case DASD_ECKD_CCW_READ_RECORD_ZERO:
654 data->operation.orientation = 0x3;
655 data->operation.operation = 0x16;
656 data->count++;
657 break;
658 case DASD_ECKD_CCW_WRITE:
659 case DASD_ECKD_CCW_WRITE_MT:
660 case DASD_ECKD_CCW_WRITE_KD:
661 case DASD_ECKD_CCW_WRITE_KD_MT:
662 data->auxiliary.last_bytes_used = 0x1;
663 data->length = reclen;
664 data->operation.operation = 0x01;
665 break;
666 case DASD_ECKD_CCW_WRITE_CKD:
667 case DASD_ECKD_CCW_WRITE_CKD_MT:
668 data->auxiliary.last_bytes_used = 0x1;
669 data->length = reclen;
670 data->operation.operation = 0x03;
671 break;
672 case DASD_ECKD_CCW_READ:
673 case DASD_ECKD_CCW_READ_MT:
674 case DASD_ECKD_CCW_READ_KD:
675 case DASD_ECKD_CCW_READ_KD_MT:
676 data->auxiliary.last_bytes_used = 0x1;
677 data->length = reclen;
678 data->operation.operation = 0x06;
679 break;
680 case DASD_ECKD_CCW_READ_CKD:
681 case DASD_ECKD_CCW_READ_CKD_MT:
682 data->auxiliary.last_bytes_used = 0x1;
683 data->length = reclen;
684 data->operation.operation = 0x16;
685 break;
686 case DASD_ECKD_CCW_READ_COUNT:
687 data->operation.operation = 0x06;
688 break;
689 case DASD_ECKD_CCW_ERASE:
690 data->length = reclen;
691 data->auxiliary.last_bytes_used = 0x1;
692 data->operation.operation = 0x0b;
693 break;
694 default:
fc19f381
SH		 695 DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record "
696 "opcode 0x%x", cmd);
1da177e4 697 }
b44b0ab3
SW		 698 set_ch_t(&data->seek_addr,
699 trk / private->rdc_data.trk_per_cyl,
700 trk % private->rdc_data.trk_per_cyl);
701 data->search_arg.cyl = data->seek_addr.cyl;
702 data->search_arg.head = data->seek_addr.head;
1da177e4
LT		 703 data->search_arg.record = rec_on_trk;
704}
705
706/*
707 * Returns 1 if the block is one of the special blocks that needs
708 * to get read/written with the KD variant of the command.
709 * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and
710 * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT.
711 * Luckily the KD variants differ only by one bit (0x08) from the
712 * normal variant. So don't wonder about code like:
713 * if (dasd_eckd_cdl_special(blk_per_trk, recid))
714 * ccw->cmd_code |= 0x8;
715 */
716static inline int
717dasd_eckd_cdl_special(int blk_per_trk, int recid)
718{
719 if (recid < 3)
720 return 1;
721 if (recid < blk_per_trk)
722 return 0;
723 if (recid < 2 * blk_per_trk)
724 return 1;
725 return 0;
726}
727
728/*
729 * Returns the record size for the special blocks of the cdl format.
730 * Only returns something useful if dasd_eckd_cdl_special is true
731 * for the recid.
732 */
733static inline int
734dasd_eckd_cdl_reclen(int recid)
735{
736 if (recid < 3)
737 return sizes_trk0[recid];
738 return LABEL_SIZE;
739}
b206181d 740/* create unique id from private structure. */
542e30ce 741static void create_uid(struct dasd_conf *conf, struct dasd_uid *uid)
3d052595 742{
4abb08c2 743 int count;
3d052595 744
3d052595 745 memset(uid, 0, sizeof(struct dasd_uid));
542e30ce 746 memcpy(uid->vendor, conf->ned->HDA_manufacturer,
d0710c7c 747 sizeof(uid->vendor) - 1);
3d052595 748 EBCASC(uid->vendor, sizeof(uid->vendor) - 1);
542e30ce 749 memcpy(uid->serial, &conf->ned->serial,
d0710c7c 750 sizeof(uid->serial) - 1);
3d052595 751 EBCASC(uid->serial, sizeof(uid->serial) - 1);
542e30ce
SH		 752 uid->ssid = conf->gneq->subsystemID;
753 uid->real_unit_addr = conf->ned->unit_addr;
754 if (conf->sneq) {
755 uid->type = conf->sneq->sua_flags;
8e09f215 756 if (uid->type == UA_BASE_PAV_ALIAS)
542e30ce 757 uid->base_unit_addr = conf->sneq->base_unit_addr;
8e09f215
SW		 758 } else {
759 uid->type = UA_BASE_DEVICE;
760 }
542e30ce 761 if (conf->vdsneq) {
4abb08c2
SW		 762 for (count = 0; count < 16; count++) {
763 sprintf(uid->vduit+2*count, "%02x",
542e30ce 764 conf->vdsneq->uit[count]);
4abb08c2
SW		 765 }
766 }
b206181d
SH		 767}
768
769/*
770 * Generate device unique id that specifies the physical device.
771 */
772static int dasd_eckd_generate_uid(struct dasd_device *device)
773{
543691a4 774 struct dasd_eckd_private *private = device->private;
b206181d
SH		 775 unsigned long flags;
776
b206181d
SH		 777 if (!private)
778 return -ENODEV;
542e30ce 779 if (!private->conf.ned || !private->conf.gneq)
b206181d
SH		 780 return -ENODEV;
781 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
542e30ce 782 create_uid(&private->conf, &private->uid);
2dedf0d9 783 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
3d052595
HH		 784 return 0;
785}
786
2dedf0d9
SH		 787static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid)
788{
543691a4 789 struct dasd_eckd_private *private = device->private;
2dedf0d9
SH		 790 unsigned long flags;
791
543691a4 792 if (private) {
2dedf0d9
SH		 793 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
794 *uid = private->uid;
795 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
796 return 0;
797 }
798 return -EINVAL;
799}
800
b206181d
SH		 801/*
802 * compare device UID with data of a given dasd_eckd_private structure
803 * return 0 for match
804 */
805static int dasd_eckd_compare_path_uid(struct dasd_device *device,
542e30ce 806 struct dasd_conf *path_conf)
b206181d
SH		 807{
808 struct dasd_uid device_uid;
542e30ce 809 struct dasd_uid path_uid;
b206181d 810
542e30ce 811 create_uid(path_conf, &path_uid);
b206181d
SH		 812 dasd_eckd_get_uid(device, &device_uid);
813
542e30ce 814 return memcmp(&device_uid, &path_uid, sizeof(struct dasd_uid));
b206181d
SH		 815}
816
a4d26c6a
SW		 817static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device,
818 struct dasd_ccw_req *cqr,
819 __u8 *rcd_buffer,
820 __u8 lpm)
17283b56 821{
17283b56 822 struct ccw1 *ccw;
a4d26c6a
SW		 823 /*
824 * buffer has to start with EBCDIC "V1.0" to show
825 * support for virtual device SNEQ
826 */
827 rcd_buffer[0] = 0xE5;
828 rcd_buffer[1] = 0xF1;
829 rcd_buffer[2] = 0x4B;
830 rcd_buffer[3] = 0xF0;
17283b56
CH		 831
832 ccw = cqr->cpaddr;
a4d26c6a
SW		 833 ccw->cmd_code = DASD_ECKD_CCW_RCD;
834 ccw->flags = 0;
b87c52e4 835 ccw->cda = (__u32)virt_to_phys(rcd_buffer);
a4d26c6a
SW		 836 ccw->count = DASD_ECKD_RCD_DATA_SIZE;
837 cqr->magic = DASD_ECKD_MAGIC;
17283b56 838
8e09f215
SW		 839 cqr->startdev = device;
840 cqr->memdev = device;
841 cqr->block = NULL;
17283b56
CH		 842 cqr->expires = 10*HZ;
843 cqr->lpm = lpm;
eb6e199b 844 cqr->retries = 256;
1aae0560 845 cqr->buildclk = get_tod_clock();
17283b56 846 cqr->status = DASD_CQR_FILLED;
a4d26c6a
SW		 847 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags);
848}
849
5915a873
SH		 850/*
851 * Wakeup helper for read_conf
852 * if the cqr is not done and needs some error recovery
853 * the buffer has to be re-initialized with the EBCDIC "V1.0"
854 * to show support for virtual device SNEQ
855 */
856static void read_conf_cb(struct dasd_ccw_req *cqr, void *data)
857{
858 struct ccw1 *ccw;
859 __u8 *rcd_buffer;
860
861 if (cqr->status != DASD_CQR_DONE) {
862 ccw = cqr->cpaddr;
b87c52e4 863 rcd_buffer = phys_to_virt(ccw->cda);
5915a873
SH		 864 memset(rcd_buffer, 0, sizeof(*rcd_buffer));
865
866 rcd_buffer[0] = 0xE5;
867 rcd_buffer[1] = 0xF1;
868 rcd_buffer[2] = 0x4B;
869 rcd_buffer[3] = 0xF0;
870 }
871 dasd_wakeup_cb(cqr, data);
872}
873
a4d26c6a
SW		 874static int dasd_eckd_read_conf_immediately(struct dasd_device *device,
875 struct dasd_ccw_req *cqr,
876 __u8 *rcd_buffer,
877 __u8 lpm)
878{
879 struct ciw *ciw;
880 int rc;
881 /*
882 * sanity check: scan for RCD command in extended SenseID data
883 * some devices do not support RCD
884 */
885 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD);
886 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD)
887 return -EOPNOTSUPP;
888
889 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm);
890 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
5a27e60d 891 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags);
a4d26c6a 892 cqr->retries = 5;
5915a873 893 cqr->callback = read_conf_cb;
a4d26c6a
SW		 894 rc = dasd_sleep_on_immediatly(cqr);
895 return rc;
17283b56
CH		 896}
897
898static int dasd_eckd_read_conf_lpm(struct dasd_device *device,
899 void **rcd_buffer,
900 int *rcd_buffer_size, __u8 lpm)
901{
902 struct ciw *ciw;
903 char *rcd_buf = NULL;
904 int ret;
905 struct dasd_ccw_req *cqr;
906
907 /*
a4d26c6a
SW		 908 * sanity check: scan for RCD command in extended SenseID data
909 * some devices do not support RCD
17283b56
CH		 910 */
911 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD);
a4d26c6a 912 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) {
17283b56
CH		 913 ret = -EOPNOTSUPP;
914 goto out_error;
915 }
a4d26c6a 916 rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA);
17283b56
CH		 917 if (!rcd_buf) {
918 ret = -ENOMEM;
919 goto out_error;
920 }
a4d26c6a
SW		 921 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */,
922 0, /* use rcd_buf as data ara */
c5205f2f 923 device, NULL);
17283b56 924 if (IS_ERR(cqr)) {
a4d26c6a
SW		 925 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
926 "Could not allocate RCD request");
927 ret = -ENOMEM;
17283b56
CH		 928 goto out_error;
929 }
a4d26c6a 930 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm);
5915a873 931 cqr->callback = read_conf_cb;
17283b56
CH		 932 ret = dasd_sleep_on(cqr);
933 /*
934 * on success we update the user input parms
935 */
8e09f215 936 dasd_sfree_request(cqr, cqr->memdev);
17283b56
CH		 937 if (ret)
938 goto out_error;
939
a4d26c6a 940 *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE;
17283b56
CH		 941 *rcd_buffer = rcd_buf;
942 return 0;
943out_error:
944 kfree(rcd_buf);
945 *rcd_buffer = NULL;
946 *rcd_buffer_size = 0;
947 return ret;
948}
949
542e30ce 950static int dasd_eckd_identify_conf_parts(struct dasd_conf *conf)
4abb08c2
SW		 951{
952
953 struct dasd_sneq *sneq;
954 int i, count;
955
542e30ce
SH		 956 conf->ned = NULL;
957 conf->sneq = NULL;
958 conf->vdsneq = NULL;
959 conf->gneq = NULL;
960 count = conf->len / sizeof(struct dasd_sneq);
961 sneq = (struct dasd_sneq *)conf->data;
4abb08c2
SW		 962 for (i = 0; i < count; ++i) {
963 if (sneq->flags.identifier == 1 && sneq->format == 1)
542e30ce 964 conf->sneq = sneq;
4abb08c2 965 else if (sneq->flags.identifier == 1 && sneq->format == 4)
542e30ce 966 conf->vdsneq = (struct vd_sneq *)sneq;
4abb08c2 967 else if (sneq->flags.identifier == 2)
542e30ce 968 conf->gneq = (struct dasd_gneq *)sneq;
4abb08c2 969 else if (sneq->flags.identifier == 3 && sneq->res1 == 1)
542e30ce 970 conf->ned = (struct dasd_ned *)sneq;
4abb08c2
SW		 971 sneq++;
972 }
542e30ce
SH		 973 if (!conf->ned || !conf->gneq) {
974 conf->ned = NULL;
975 conf->sneq = NULL;
976 conf->vdsneq = NULL;
977 conf->gneq = NULL;
4abb08c2
SW		 978 return -EINVAL;
979 }
980 return 0;
981
982};
983
984static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len)
985{
986 struct dasd_gneq *gneq;
987 int i, count, found;
988
989 count = conf_len / sizeof(*gneq);
990 gneq = (struct dasd_gneq *)conf_data;
991 found = 0;
992 for (i = 0; i < count; ++i) {
993 if (gneq->flags.identifier == 2) {
994 found = 1;
995 break;
996 }
997 gneq++;
998 }
999 if (found)
1000 return ((char *)gneq)[18] & 0x07;
1001 else
1002 return 0;
1003}
1004
d2a52758
JH		 1005static void dasd_eckd_store_conf_data(struct dasd_device *device,
1006 struct dasd_conf_data *conf_data, int chp)
1007{
952835ed 1008 struct dasd_eckd_private *private = device->private;
d2a52758
JH		 1009 struct channel_path_desc_fmt0 *chp_desc;
1010 struct subchannel_id sch_id;
952835ed 1011 void *cdp;
d2a52758 1012
46018121
JH		 1013 /*
1014 * path handling and read_conf allocate data
1015 * free it before replacing the pointer
952835ed
SH		 1016 * also replace the old private->conf_data pointer
1017 * with the new one if this points to the same data
46018121 1018 */
952835ed 1019 cdp = device->path[chp].conf_data;
542e30ce
SH		 1020 if (private->conf.data == cdp) {
1021 private->conf.data = (void *)conf_data;
1022 dasd_eckd_identify_conf_parts(&private->conf);
952835ed
SH		 1023 }
1024 ccw_device_get_schid(device->cdev, &sch_id);
d2a52758
JH		 1025 device->path[chp].conf_data = conf_data;
1026 device->path[chp].cssid = sch_id.cssid;
1027 device->path[chp].ssid = sch_id.ssid;
1028 chp_desc = ccw_device_get_chp_desc(device->cdev, chp);
1029 if (chp_desc)
1030 device->path[chp].chpid = chp_desc->chpid;
1031 kfree(chp_desc);
952835ed 1032 kfree(cdp);
d2a52758
JH		 1033}
1034
c7c0c9de
SH		 1035static void dasd_eckd_clear_conf_data(struct dasd_device *device)
1036{
543691a4 1037 struct dasd_eckd_private *private = device->private;
c7c0c9de
SH		 1038 int i;
1039
542e30ce
SH		 1040 private->conf.data = NULL;
1041 private->conf.len = 0;
c7c0c9de 1042 for (i = 0; i < 8; i++) {
c9346151
SH		 1043 kfree(device->path[i].conf_data);
1044 device->path[i].conf_data = NULL;
a521b048
SH		 1045 device->path[i].cssid = 0;
1046 device->path[i].ssid = 0;
1047 device->path[i].chpid = 0;
9e34c8ba 1048 dasd_path_notoper(device, i);
c7c0c9de
SH		 1049 }
1050}
1051
19508b20
JH		 1052static void dasd_eckd_read_fc_security(struct dasd_device *device)
1053{
1054 struct dasd_eckd_private *private = device->private;
1055 u8 esm_valid;
1056 u8 esm[8];
1057 int chp;
1058 int rc;
1059
1060 rc = chsc_scud(private->uid.ssid, (u64 *)esm, &esm_valid);
1061 if (rc) {
1062 for (chp = 0; chp < 8; chp++)
1063 device->path[chp].fc_security = 0;
1064 return;
1065 }
1066
1067 for (chp = 0; chp < 8; chp++) {
1068 if (esm_valid & (0x80 >> chp))
1069 device->path[chp].fc_security = esm[chp];
1070 else
1071 device->path[chp].fc_security = 0;
c7c0c9de
SH		 1072 }
1073}
c7c0c9de 1074
542e30ce 1075static void dasd_eckd_get_uid_string(struct dasd_conf *conf,
23596961
SH		 1076 char *print_uid)
1077{
542e30ce 1078 struct dasd_uid uid;
23596961 1079
542e30ce
SH		 1080 create_uid(conf, &uid);
1081 if (strlen(uid.vduit) > 0)
23596961
SH		 1082 snprintf(print_uid, sizeof(*print_uid),
1083 "%s.%s.%04x.%02x.%s",
542e30ce
SH		 1084 uid.vendor, uid.serial, uid.ssid,
1085 uid.real_unit_addr, uid.vduit);
23596961
SH		 1086 else
1087 snprintf(print_uid, sizeof(*print_uid),
1088 "%s.%s.%04x.%02x",
542e30ce
SH		 1089 uid.vendor, uid.serial, uid.ssid,
1090 uid.real_unit_addr);
23596961
SH		 1091}
1092
1093static int dasd_eckd_check_cabling(struct dasd_device *device,
1094 void *conf_data, __u8 lpm)
1095{
1096 struct dasd_eckd_private *private = device->private;
1097 char print_path_uid[60], print_device_uid[60];
542e30ce 1098 struct dasd_conf path_conf;
23596961 1099
542e30ce
SH		 1100 path_conf.data = conf_data;
1101 path_conf.len = DASD_ECKD_RCD_DATA_SIZE;
1102 if (dasd_eckd_identify_conf_parts(&path_conf))
23596961
SH		 1103 return 1;
1104
542e30ce
SH		 1105 if (dasd_eckd_compare_path_uid(device, &path_conf)) {
1106 dasd_eckd_get_uid_string(&path_conf, print_path_uid);
1107 dasd_eckd_get_uid_string(&private->conf, print_device_uid);
23596961
SH		 1108 dev_err(&device->cdev->dev,
1109 "Not all channel paths lead to the same device, path %02X leads to device %s instead of %s\n",
1110 lpm, print_path_uid, print_device_uid);
1111 return 1;
1112 }
1113
1114 return 0;
1115}
1116
4abb08c2 1117static int dasd_eckd_read_conf(struct dasd_device *device)
1da177e4
LT		 1118{
1119 void *conf_data;
1120 int conf_len, conf_data_saved;
b179b037 1121 int rc, path_err, pos;
a4d26c6a 1122 __u8 lpm, opm;
23596961 1123 struct dasd_eckd_private *private;
1da177e4 1124
543691a4 1125 private = device->private;
a4d26c6a 1126 opm = ccw_device_get_path_mask(device->cdev);
1da177e4 1127 conf_data_saved = 0;
55d3a85c 1128 path_err = 0;
1da177e4
LT		 1129 /* get configuration data per operational path */
1130 for (lpm = 0x80; lpm; lpm>>= 1) {
b206181d
SH		 1131 if (!(lpm & opm))
1132 continue;
1133 rc = dasd_eckd_read_conf_lpm(device, &conf_data,
1134 &conf_len, lpm);
1135 if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */
1136 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1137 "Read configuration data returned "
1138 "error %d", rc);
1139 return rc;
1140 }
1141 if (conf_data == NULL) {
1142 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1143 "No configuration data "
1144 "retrieved");
1145 /* no further analysis possible */
c9346151 1146 dasd_path_add_opm(device, opm);
b206181d
SH		 1147 continue; /* no error */
1148 }
1149 /* save first valid configuration data */
1150 if (!conf_data_saved) {
c7c0c9de
SH		 1151 /* initially clear previously stored conf_data */
1152 dasd_eckd_clear_conf_data(device);
542e30ce
SH		 1153 private->conf.data = conf_data;
1154 private->conf.len = conf_len;
1155 if (dasd_eckd_identify_conf_parts(&private->conf)) {
1156 private->conf.data = NULL;
1157 private->conf.len = 0;
b206181d
SH		 1158 kfree(conf_data);
1159 continue;
1da177e4 1160 }
b206181d
SH		 1161 /*
1162 * build device UID that other path data
1163 * can be compared to it
1164 */
1165 dasd_eckd_generate_uid(device);
1166 conf_data_saved++;
23596961
SH		 1167 } else if (dasd_eckd_check_cabling(device, conf_data, lpm)) {
1168 dasd_path_add_cablepm(device, lpm);
1169 path_err = -EINVAL;
1170 kfree(conf_data);
1171 continue;
b206181d 1172 }
d2a52758
JH		 1173
1174 pos = pathmask_to_pos(lpm);
1175 dasd_eckd_store_conf_data(device, conf_data, pos);
1176
b206181d
SH		 1177 switch (dasd_eckd_path_access(conf_data, conf_len)) {
1178 case 0x02:
c9346151 1179 dasd_path_add_nppm(device, lpm);
b206181d
SH		 1180 break;
1181 case 0x03:
c9346151 1182 dasd_path_add_ppm(device, lpm);
b206181d 1183 break;
1da177e4 1184 }
c9346151
SH		 1185 if (!dasd_path_get_opm(device)) {
1186 dasd_path_set_opm(device, lpm);
ccc0e7dc
SH		 1187 dasd_generic_path_operational(device);
1188 } else {
c9346151 1189 dasd_path_add_opm(device, lpm);
ccc0e7dc 1190 }
1da177e4 1191 }
b206181d 1192
55d3a85c 1193 return path_err;
1da177e4
LT		 1194}
1195
a521b048
SH		 1196static u32 get_fcx_max_data(struct dasd_device *device)
1197{
1198 struct dasd_eckd_private *private = device->private;
1199 int fcx_in_css, fcx_in_gneq, fcx_in_features;
dd4b3c83
JH		 1200 unsigned int mdc;
1201 int tpm;
a521b048
SH		 1202
1203 if (dasd_nofcx)
1204 return 0;
1205 /* is transport mode supported? */
1206 fcx_in_css = css_general_characteristics.fcx;
542e30ce 1207 fcx_in_gneq = private->conf.gneq->reserved2[7] & 0x04;
a521b048
SH		 1208 fcx_in_features = private->features.feature[40] & 0x80;
1209 tpm = fcx_in_css && fcx_in_gneq && fcx_in_features;
1210
1211 if (!tpm)
1212 return 0;
1213
1214 mdc = ccw_device_get_mdc(device->cdev, 0);
dd4b3c83 1215 if (mdc == 0) {
a521b048
SH		 1216 dev_warn(&device->cdev->dev, "Detecting the maximum supported data size for zHPF requests failed\n");
1217 return 0;
1218 } else {
1219 return (u32)mdc * FCX_MAX_DATA_FACTOR;
1220 }
1221}
1222
a4d26c6a
SW		 1223static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm)
1224{
543691a4 1225 struct dasd_eckd_private *private = device->private;
dd4b3c83 1226 unsigned int mdc;
a4d26c6a
SW		 1227 u32 fcx_max_data;
1228
a4d26c6a
SW		 1229 if (private->fcx_max_data) {
1230 mdc = ccw_device_get_mdc(device->cdev, lpm);
dd4b3c83 1231 if (mdc == 0) {
a4d26c6a
SW		 1232 dev_warn(&device->cdev->dev,
1233 "Detecting the maximum data size for zHPF "
1234 "requests failed (rc=%d) for a new path %x\n",
1235 mdc, lpm);
1236 return mdc;
1237 }
0f02c4e7 1238 fcx_max_data = (u32)mdc * FCX_MAX_DATA_FACTOR;
a4d26c6a
SW		 1239 if (fcx_max_data < private->fcx_max_data) {
1240 dev_warn(&device->cdev->dev,
1241 "The maximum data size for zHPF requests %u "
1242 "on a new path %x is below the active maximum "
1243 "%u\n", fcx_max_data, lpm,
1244 private->fcx_max_data);
1245 return -EACCES;
1246 }
1247 }
1248 return 0;
1249}
1250
b206181d 1251static int rebuild_device_uid(struct dasd_device *device,
b7294932 1252 struct pe_handler_work_data *data)
b206181d 1253{
543691a4 1254 struct dasd_eckd_private *private = device->private;
c9346151 1255 __u8 lpm, opm = dasd_path_get_opm(device);
543691a4 1256 int rc = -ENODEV;
b206181d
SH		 1257
1258 for (lpm = 0x80; lpm; lpm >>= 1) {
1259 if (!(lpm & opm))
1260 continue;
1261 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer));
1262 memset(&data->cqr, 0, sizeof(data->cqr));
1263 data->cqr.cpaddr = &data->ccw;
1264 rc = dasd_eckd_read_conf_immediately(device, &data->cqr,
1265 data->rcd_buffer,
1266 lpm);
1267
1268 if (rc) {
1269 if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */
1270 continue;
1271 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1272 "Read configuration data "
1273 "returned error %d", rc);
1274 break;
1275 }
542e30ce 1276 memcpy(private->conf.data, data->rcd_buffer,
b206181d 1277 DASD_ECKD_RCD_DATA_SIZE);
542e30ce 1278 if (dasd_eckd_identify_conf_parts(&private->conf)) {
b206181d
SH		 1279 rc = -ENODEV;
1280 } else /* first valid path is enough */
1281 break;
1282 }
1283
1284 if (!rc)
1285 rc = dasd_eckd_generate_uid(device);
1286
1287 return rc;
1288}
1289
b7294932
JH		 1290static void dasd_eckd_path_available_action(struct dasd_device *device,
1291 struct pe_handler_work_data *data)
a4d26c6a 1292{
b206181d 1293 __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE];
5db8440c 1294 __u8 lpm, opm, npm, ppm, epm, hpfpm, cablepm;
46018121 1295 struct dasd_conf_data *conf_data;
542e30ce 1296 struct dasd_conf path_conf;
a4d26c6a 1297 unsigned long flags;
b206181d 1298 char print_uid[60];
46018121 1299 int rc, pos;
a4d26c6a
SW		 1300
1301 opm = 0;
1302 npm = 0;
1303 ppm = 0;
1304 epm = 0;
5db8440c
SH		 1305 hpfpm = 0;
1306 cablepm = 0;
1307
a4d26c6a 1308 for (lpm = 0x80; lpm; lpm >>= 1) {
b206181d
SH		 1309 if (!(lpm & data->tbvpm))
1310 continue;
1311 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer));
1312 memset(&data->cqr, 0, sizeof(data->cqr));
1313 data->cqr.cpaddr = &data->ccw;
1314 rc = dasd_eckd_read_conf_immediately(device, &data->cqr,
1315 data->rcd_buffer,
1316 lpm);
1317 if (!rc) {
1318 switch (dasd_eckd_path_access(data->rcd_buffer,
1319 DASD_ECKD_RCD_DATA_SIZE)
1320 ) {
1321 case 0x02:
1322 npm |= lpm;
1323 break;
1324 case 0x03:
1325 ppm |= lpm;
1326 break;
1327 }
1328 opm |= lpm;
1329 } else if (rc == -EOPNOTSUPP) {
1330 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1331 "path verification: No configuration "
1332 "data retrieved");
1333 opm |= lpm;
1334 } else if (rc == -EAGAIN) {
1335 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
a4d26c6a
SW		 1336 "path verification: device is stopped,"
1337 " try again later");
b206181d
SH		 1338 epm |= lpm;
1339 } else {
1340 dev_warn(&device->cdev->dev,
1341 "Reading device feature codes failed "
1342 "(rc=%d) for new path %x\n", rc, lpm);
1343 continue;
1344 }
1345 if (verify_fcx_max_data(device, lpm)) {
1346 opm &= ~lpm;
1347 npm &= ~lpm;
1348 ppm &= ~lpm;
5db8440c 1349 hpfpm |= lpm;
b206181d
SH		 1350 continue;
1351 }
1352
1353 /*
1354 * save conf_data for comparison after
1355 * rebuild_device_uid may have changed
1356 * the original data
1357 */
1358 memcpy(&path_rcd_buf, data->rcd_buffer,
1359 DASD_ECKD_RCD_DATA_SIZE);
542e30ce
SH		 1360 path_conf.data = (void *)&path_rcd_buf;
1361 path_conf.len = DASD_ECKD_RCD_DATA_SIZE;
1362 if (dasd_eckd_identify_conf_parts(&path_conf)) {
1363 path_conf.data = NULL;
1364 path_conf.len = 0;
b206181d
SH		 1365 continue;
1366 }
1367
1368 /*
1369 * compare path UID with device UID only if at least
1370 * one valid path is left
1371 * in other case the device UID may have changed and
1372 * the first working path UID will be used as device UID
1373 */
c9346151 1374 if (dasd_path_get_opm(device) &&
542e30ce 1375 dasd_eckd_compare_path_uid(device, &path_conf)) {
b206181d
SH		 1376 /*
1377 * the comparison was not successful
1378 * rebuild the device UID with at least one
1379 * known path in case a z/VM hyperswap command
1380 * has changed the device
1381 *
1382 * after this compare again
1383 *
1384 * if either the rebuild or the recompare fails
1385 * the path can not be used
1386 */
1387 if (rebuild_device_uid(device, data) ||
1388 dasd_eckd_compare_path_uid(
542e30ce
SH		 1389 device, &path_conf)) {
1390 dasd_eckd_get_uid_string(&path_conf, print_uid);
b206181d
SH		 1391 dev_err(&device->cdev->dev,
1392 "The newly added channel path %02X "
1393 "will not be used because it leads "
1394 "to a different device %s\n",
1395 lpm, print_uid);
a4d26c6a
SW		 1396 opm &= ~lpm;
1397 npm &= ~lpm;
1398 ppm &= ~lpm;
5db8440c 1399 cablepm |= lpm;
b206181d 1400 continue;
a4d26c6a
SW		 1401 }
1402 }
b206181d 1403
46018121
JH		 1404 conf_data = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL);
1405 if (conf_data) {
1406 memcpy(conf_data, data->rcd_buffer,
1407 DASD_ECKD_RCD_DATA_SIZE);
9dffede0
SH		 1408 } else {
1409 /*
1410 * path is operational but path config data could not
1411 * be stored due to low mem condition
1412 * add it to the error path mask and schedule a path
1413 * verification later that this could be added again
1414 */
1415 epm |= lpm;
46018121
JH		 1416 }
1417 pos = pathmask_to_pos(lpm);
1418 dasd_eckd_store_conf_data(device, conf_data, pos);
1419
b206181d
SH		 1420 /*
1421 * There is a small chance that a path is lost again between
1422 * above path verification and the following modification of
1423 * the device opm mask. We could avoid that race here by using
1424 * yet another path mask, but we rather deal with this unlikely
1425 * situation in dasd_start_IO.
1426 */
1427 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
c9346151
SH		 1428 if (!dasd_path_get_opm(device) && opm) {
1429 dasd_path_set_opm(device, opm);
b206181d 1430 dasd_generic_path_operational(device);
5db8440c 1431 } else {
c9346151 1432 dasd_path_add_opm(device, opm);
5db8440c 1433 }
c9346151
SH		 1434 dasd_path_add_nppm(device, npm);
1435 dasd_path_add_ppm(device, ppm);
9dffede0
SH		 1436 if (epm) {
1437 dasd_path_add_tbvpm(device, epm);
1438 dasd_device_set_timer(device, 50);
1439 }
c9346151
SH		 1440 dasd_path_add_cablepm(device, cablepm);
1441 dasd_path_add_nohpfpm(device, hpfpm);
b206181d 1442 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
19508b20
JH		 1443
1444 dasd_path_create_kobj(device, pos);
a4d26c6a 1445 }
b7294932
JH		 1446}
1447
1448static void do_pe_handler_work(struct work_struct *work)
1449{
1450 struct pe_handler_work_data *data;
1451 struct dasd_device *device;
1452
1453 data = container_of(work, struct pe_handler_work_data, worker);
1454 device = data->device;
1455
1456 /* delay path verification until device was resumed */
1457 if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) {
1458 schedule_work(work);
1459 return;
1460 }
1461 /* check if path verification already running and delay if so */
1462 if (test_and_set_bit(DASD_FLAG_PATH_VERIFY, &device->flags)) {
1463 schedule_work(work);
1464 return;
a4d26c6a 1465 }
b7294932 1466
4d063e64
JH		 1467 if (data->tbvpm)
1468 dasd_eckd_path_available_action(device, data);
1469 if (data->fcsecpm)
1470 dasd_eckd_read_fc_security(device);
b7294932 1471
1eb38023 1472 clear_bit(DASD_FLAG_PATH_VERIFY, &device->flags);
a4d26c6a
SW		 1473 dasd_put_device(device);
1474 if (data->isglobal)
b7294932 1475 mutex_unlock(&dasd_pe_handler_mutex);
a4d26c6a
SW		 1476 else
1477 kfree(data);
1478}
1479
4d063e64
JH		 1480static int dasd_eckd_pe_handler(struct dasd_device *device,
1481 __u8 tbvpm, __u8 fcsecpm)
a4d26c6a 1482{
b7294932 1483 struct pe_handler_work_data *data;
a4d26c6a 1484
f1c8781a 1485 data = kzalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA);
a4d26c6a 1486 if (!data) {
b7294932
JH		 1487 if (mutex_trylock(&dasd_pe_handler_mutex)) {
1488 data = pe_handler_worker;
a4d26c6a 1489 data->isglobal = 1;
b7294932 1490 } else {
a4d26c6a 1491 return -ENOMEM;
b7294932 1492 }
a4d26c6a 1493 }
b7294932 1494 INIT_WORK(&data->worker, do_pe_handler_work);
a4d26c6a
SW		 1495 dasd_get_device(device);
1496 data->device = device;
4d063e64
JH		 1497 data->tbvpm = tbvpm;
1498 data->fcsecpm = fcsecpm;
a4d26c6a
SW		 1499 schedule_work(&data->worker);
1500 return 0;
1501}
1502
a521b048
SH		 1503static void dasd_eckd_reset_path(struct dasd_device *device, __u8 pm)
1504{
1505 struct dasd_eckd_private *private = device->private;
1506 unsigned long flags;
1507
1508 if (!private->fcx_max_data)
1509 private->fcx_max_data = get_fcx_max_data(device);
1510 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
1511 dasd_path_set_tbvpm(device, pm ? : dasd_path_get_notoperpm(device));
1512 dasd_schedule_device_bh(device);
1513 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
1514}
1515
8e09f215
SW		 1516static int dasd_eckd_read_features(struct dasd_device *device)
1517{
543691a4 1518 struct dasd_eckd_private *private = device->private;
8e09f215
SW		 1519 struct dasd_psf_prssd_data *prssdp;
1520 struct dasd_rssd_features *features;
1521 struct dasd_ccw_req *cqr;
1522 struct ccw1 *ccw;
1523 int rc;
8e09f215 1524
68d1e5f0 1525 memset(&private->features, 0, sizeof(struct dasd_rssd_features));
68b781fe 1526 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
8e09f215
SW		 1527 (sizeof(struct dasd_psf_prssd_data) +
1528 sizeof(struct dasd_rssd_features)),
c5205f2f 1529 device, NULL);
8e09f215 1530 if (IS_ERR(cqr)) {
b8ed5dd5
SH		 1531 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not "
1532 "allocate initialization request");
8e09f215
SW		 1533 return PTR_ERR(cqr);
1534 }
1535 cqr->startdev = device;
1536 cqr->memdev = device;
1537 cqr->block = NULL;
eb6e199b 1538 cqr->retries = 256;
8e09f215
SW		 1539 cqr->expires = 10 * HZ;
1540
1541 /* Prepare for Read Subsystem Data */
1542 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
1543 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
1544 prssdp->order = PSF_ORDER_PRSSD;
1545 prssdp->suborder = 0x41; /* Read Feature Codes */
1546 /* all other bytes of prssdp must be zero */
1547
1548 ccw = cqr->cpaddr;
1549 ccw->cmd_code = DASD_ECKD_CCW_PSF;
1550 ccw->count = sizeof(struct dasd_psf_prssd_data);
1551 ccw->flags |= CCW_FLAG_CC;
b87c52e4 1552 ccw->cda = (__u32)virt_to_phys(prssdp);
8e09f215
SW		 1553
1554 /* Read Subsystem Data - feature codes */
1555 features = (struct dasd_rssd_features *) (prssdp + 1);
1556 memset(features, 0, sizeof(struct dasd_rssd_features));
1557
1558 ccw++;
1559 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
1560 ccw->count = sizeof(struct dasd_rssd_features);
b87c52e4 1561 ccw->cda = (__u32)virt_to_phys(features);
8e09f215 1562
1aae0560 1563 cqr->buildclk = get_tod_clock();
8e09f215
SW		 1564 cqr->status = DASD_CQR_FILLED;
1565 rc = dasd_sleep_on(cqr);
1566 if (rc == 0) {
1567 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
1568 features = (struct dasd_rssd_features *) (prssdp + 1);
1569 memcpy(&private->features, features,
1570 sizeof(struct dasd_rssd_features));
68d1e5f0
SW		 1571 } else
1572 dev_warn(&device->cdev->dev, "Reading device feature codes"
1573 " failed with rc=%d\n", rc);
8e09f215
SW		 1574 dasd_sfree_request(cqr, cqr->memdev);
1575 return rc;
1576}
1577
c729696b
JH		 1578/* Read Volume Information - Volume Storage Query */
1579static int dasd_eckd_read_vol_info(struct dasd_device *device)
1580{
1581 struct dasd_eckd_private *private = device->private;
1582 struct dasd_psf_prssd_data *prssdp;
1583 struct dasd_rssd_vsq *vsq;
1584 struct dasd_ccw_req *cqr;
1585 struct ccw1 *ccw;
9e12e54c 1586 int useglobal;
c729696b
JH		 1587 int rc;
1588
1589 /* This command cannot be executed on an alias device */
1590 if (private->uid.type == UA_BASE_PAV_ALIAS ||
1591 private->uid.type == UA_HYPER_PAV_ALIAS)
1592 return 0;
1593
9e12e54c 1594 useglobal = 0;
c729696b
JH		 1595 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 /* PSF + RSSD */,
1596 sizeof(*prssdp) + sizeof(*vsq), device, NULL);
1597 if (IS_ERR(cqr)) {
1598 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1599 "Could not allocate initialization request");
9e12e54c
JH		 1600 mutex_lock(&dasd_vol_info_mutex);
1601 useglobal = 1;
1602 cqr = &dasd_vol_info_req->cqr;
1603 memset(cqr, 0, sizeof(*cqr));
1604 memset(dasd_vol_info_req, 0, sizeof(*dasd_vol_info_req));
1605 cqr->cpaddr = &dasd_vol_info_req->ccw;
1606 cqr->data = &dasd_vol_info_req->data;
1607 cqr->magic = DASD_ECKD_MAGIC;
c729696b
JH		 1608 }
1609
1610 /* Prepare for Read Subsystem Data */
1611 prssdp = cqr->data;
1612 prssdp->order = PSF_ORDER_PRSSD;
1613 prssdp->suborder = PSF_SUBORDER_VSQ; /* Volume Storage Query */
542e30ce
SH		 1614 prssdp->lss = private->conf.ned->ID;
1615 prssdp->volume = private->conf.ned->unit_addr;
c729696b
JH		 1616
1617 ccw = cqr->cpaddr;
1618 ccw->cmd_code = DASD_ECKD_CCW_PSF;
1619 ccw->count = sizeof(*prssdp);
1620 ccw->flags |= CCW_FLAG_CC;
b87c52e4 1621 ccw->cda = (__u32)virt_to_phys(prssdp);
c729696b
JH		 1622
1623 /* Read Subsystem Data - Volume Storage Query */
1624 vsq = (struct dasd_rssd_vsq *)(prssdp + 1);
1625 memset(vsq, 0, sizeof(*vsq));
1626
1627 ccw++;
1628 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
1629 ccw->count = sizeof(*vsq);
1630 ccw->flags |= CCW_FLAG_SLI;
b87c52e4 1631 ccw->cda = (__u32)virt_to_phys(vsq);
c729696b
JH		 1632
1633 cqr->buildclk = get_tod_clock();
1634 cqr->status = DASD_CQR_FILLED;
1635 cqr->startdev = device;
1636 cqr->memdev = device;
1637 cqr->block = NULL;
1638 cqr->retries = 256;
1639 cqr->expires = device->default_expires * HZ;
1640 /* The command might not be supported. Suppress the error output */
1641 __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags);
1642
1643 rc = dasd_sleep_on_interruptible(cqr);
1644 if (rc == 0) {
1645 memcpy(&private->vsq, vsq, sizeof(*vsq));
1646 } else {
dd454839
JH		 1647 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1648 "Reading the volume storage information failed with rc=%d", rc);
c729696b
JH		 1649 }
1650
9e12e54c
JH		 1651 if (useglobal)
1652 mutex_unlock(&dasd_vol_info_mutex);
1653 else
1654 dasd_sfree_request(cqr, cqr->memdev);
c729696b
JH		 1655
1656 return rc;
1657}
1658
1659static int dasd_eckd_is_ese(struct dasd_device *device)
1660{
1661 struct dasd_eckd_private *private = device->private;
1662
1663 return private->vsq.vol_info.ese;
1664}
1665
1666static int dasd_eckd_ext_pool_id(struct dasd_device *device)
1667{
1668 struct dasd_eckd_private *private = device->private;
1669
1670 return private->vsq.extent_pool_id;
1671}
1672
1673/*
1674 * This value represents the total amount of available space. As more space is
1675 * allocated by ESE volumes, this value will decrease.
1676 * The data for this value is therefore updated on any call.
1677 */
1678static int dasd_eckd_space_configured(struct dasd_device *device)
1679{
1680 struct dasd_eckd_private *private = device->private;
1681 int rc;
1682
1683 rc = dasd_eckd_read_vol_info(device);
1684
1685 return rc ? : private->vsq.space_configured;
1686}
1687
1688/*
1689 * The value of space allocated by an ESE volume may have changed and is
1690 * therefore updated on any call.
1691 */
1692static int dasd_eckd_space_allocated(struct dasd_device *device)
1693{
1694 struct dasd_eckd_private *private = device->private;
1695 int rc;
1696
1697 rc = dasd_eckd_read_vol_info(device);
1698
1699 return rc ? : private->vsq.space_allocated;
1700}
1701
1702static int dasd_eckd_logical_capacity(struct dasd_device *device)
1703{
1704 struct dasd_eckd_private *private = device->private;
1705
1706 return private->vsq.logical_capacity;
1707}
1708
9e12e54c
JH		 1709static void dasd_eckd_ext_pool_exhaust_work(struct work_struct *work)
1710{
1711 struct ext_pool_exhaust_work_data *data;
1712 struct dasd_device *device;
1713 struct dasd_device *base;
1714
1715 data = container_of(work, struct ext_pool_exhaust_work_data, worker);
1716 device = data->device;
1717 base = data->base;
1718
1719 if (!base)
1720 base = device;
1721 if (dasd_eckd_space_configured(base) != 0) {
1722 dasd_generic_space_avail(device);
1723 } else {
1724 dev_warn(&device->cdev->dev, "No space left in the extent pool\n");
1725 DBF_DEV_EVENT(DBF_WARNING, device, "%s", "out of space");
1726 }
1727
1728 dasd_put_device(device);
1729 kfree(data);
1730}
1731
1732static int dasd_eckd_ext_pool_exhaust(struct dasd_device *device,
1733 struct dasd_ccw_req *cqr)
1734{
1735 struct ext_pool_exhaust_work_data *data;
1736
1737 data = kzalloc(sizeof(*data), GFP_ATOMIC);
1738 if (!data)
1739 return -ENOMEM;
1740 INIT_WORK(&data->worker, dasd_eckd_ext_pool_exhaust_work);
1741 dasd_get_device(device);
1742 data->device = device;
1743
1744 if (cqr->block)
1745 data->base = cqr->block->base;
1746 else if (cqr->basedev)
1747 data->base = cqr->basedev;
1748 else
1749 data->base = NULL;
1750
1751 schedule_work(&data->worker);
1752
1753 return 0;
1754}
1755
c729696b
JH		 1756static void dasd_eckd_cpy_ext_pool_data(struct dasd_device *device,
1757 struct dasd_rssd_lcq *lcq)
1758{
1759 struct dasd_eckd_private *private = device->private;
1760 int pool_id = dasd_eckd_ext_pool_id(device);
1761 struct dasd_ext_pool_sum eps;
1762 int i;
1763
1764 for (i = 0; i < lcq->pool_count; i++) {
1765 eps = lcq->ext_pool_sum[i];
1766 if (eps.pool_id == pool_id) {
1767 memcpy(&private->eps, &eps,
1768 sizeof(struct dasd_ext_pool_sum));
1769 }
1770 }
1771}
1772
1773/* Read Extent Pool Information - Logical Configuration Query */
1774static int dasd_eckd_read_ext_pool_info(struct dasd_device *device)
1775{
1776 struct dasd_eckd_private *private = device->private;
1777 struct dasd_psf_prssd_data *prssdp;
1778 struct dasd_rssd_lcq *lcq;
1779 struct dasd_ccw_req *cqr;
1780 struct ccw1 *ccw;
1781 int rc;
1782
1783 /* This command cannot be executed on an alias device */
1784 if (private->uid.type == UA_BASE_PAV_ALIAS ||
1785 private->uid.type == UA_HYPER_PAV_ALIAS)
1786 return 0;
1787
1788 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 /* PSF + RSSD */,
1789 sizeof(*prssdp) + sizeof(*lcq), device, NULL);
1790 if (IS_ERR(cqr)) {
1791 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1792 "Could not allocate initialization request");
1793 return PTR_ERR(cqr);
1794 }
1795
1796 /* Prepare for Read Subsystem Data */
1797 prssdp = cqr->data;
1798 memset(prssdp, 0, sizeof(*prssdp));
1799 prssdp->order = PSF_ORDER_PRSSD;
1800 prssdp->suborder = PSF_SUBORDER_LCQ; /* Logical Configuration Query */
1801
1802 ccw = cqr->cpaddr;
1803 ccw->cmd_code = DASD_ECKD_CCW_PSF;
1804 ccw->count = sizeof(*prssdp);
1805 ccw->flags |= CCW_FLAG_CC;
b87c52e4 1806 ccw->cda = (__u32)virt_to_phys(prssdp);
c729696b
JH		 1807
1808 lcq = (struct dasd_rssd_lcq *)(prssdp + 1);
1809 memset(lcq, 0, sizeof(*lcq));
1810
1811 ccw++;
1812 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
1813 ccw->count = sizeof(*lcq);
1814 ccw->flags |= CCW_FLAG_SLI;
b87c52e4 1815 ccw->cda = (__u32)virt_to_phys(lcq);
c729696b
JH		 1816
1817 cqr->buildclk = get_tod_clock();
1818 cqr->status = DASD_CQR_FILLED;
1819 cqr->startdev = device;
1820 cqr->memdev = device;
1821 cqr->block = NULL;
1822 cqr->retries = 256;
1823 cqr->expires = device->default_expires * HZ;
1824 /* The command might not be supported. Suppress the error output */
1825 __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags);
1826
1827 rc = dasd_sleep_on_interruptible(cqr);
1828 if (rc == 0) {
1829 dasd_eckd_cpy_ext_pool_data(device, lcq);
1830 } else {
dd454839
JH		 1831 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1832 "Reading the logical configuration failed with rc=%d", rc);
c729696b
JH		 1833 }
1834
1835 dasd_sfree_request(cqr, cqr->memdev);
1836
1837 return rc;
1838}
1839
1840/*
1841 * Depending on the device type, the extent size is specified either as
1842 * cylinders per extent (CKD) or size per extent (FBA)
1843 * A 1GB size corresponds to 1113cyl, and 16MB to 21cyl.
1844 */
1845static int dasd_eckd_ext_size(struct dasd_device *device)
1846{
1847 struct dasd_eckd_private *private = device->private;
1848 struct dasd_ext_pool_sum eps = private->eps;
1849
1850 if (!eps.flags.extent_size_valid)
1851 return 0;
1852 if (eps.extent_size.size_1G)
1853 return 1113;
1854 if (eps.extent_size.size_16M)
1855 return 21;
1856
1857 return 0;
1858}
1859
1860static int dasd_eckd_ext_pool_warn_thrshld(struct dasd_device *device)
1861{
1862 struct dasd_eckd_private *private = device->private;
1863
1864 return private->eps.warn_thrshld;
1865}
1866
1867static int dasd_eckd_ext_pool_cap_at_warnlevel(struct dasd_device *device)
1868{
1869 struct dasd_eckd_private *private = device->private;
1870
1871 return private->eps.flags.capacity_at_warnlevel;
1872}
1873
1874/*
1875 * Extent Pool out of space
1876 */
1877static int dasd_eckd_ext_pool_oos(struct dasd_device *device)
1878{
1879 struct dasd_eckd_private *private = device->private;
1880
1881 return private->eps.flags.pool_oos;
1882}
8e09f215 1883
40545573
HH		 1884/*
1885 * Build CP for Perform Subsystem Function - SSC.
1886 */
f3eb5384
SW		 1887static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device,
1888 int enable_pav)
40545573 1889{
8e09f215
SW		 1890 struct dasd_ccw_req *cqr;
1891 struct dasd_psf_ssc_data *psf_ssc_data;
1892 struct ccw1 *ccw;
40545573 1893
68b781fe 1894 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ ,
40545573 1895 sizeof(struct dasd_psf_ssc_data),
c5205f2f 1896 device, NULL);
40545573 1897
8e09f215 1898 if (IS_ERR(cqr)) {
fc19f381 1899 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
40545573 1900 "Could not allocate PSF-SSC request");
8e09f215
SW		 1901 return cqr;
1902 }
1903 psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data;
1904 psf_ssc_data->order = PSF_ORDER_SSC;
626350b6 1905 psf_ssc_data->suborder = 0xc0;
f3eb5384 1906 if (enable_pav) {
626350b6 1907 psf_ssc_data->suborder |= 0x08;
f3eb5384
SW		 1908 psf_ssc_data->reserved[0] = 0x88;
1909 }
8e09f215
SW		 1910 ccw = cqr->cpaddr;
1911 ccw->cmd_code = DASD_ECKD_CCW_PSF;
b87c52e4 1912 ccw->cda = (__u32)virt_to_phys(psf_ssc_data);
8e09f215
SW		 1913 ccw->count = 66;
1914
1915 cqr->startdev = device;
1916 cqr->memdev = device;
1917 cqr->block = NULL;
eb6e199b 1918 cqr->retries = 256;
8e09f215 1919 cqr->expires = 10*HZ;
1aae0560 1920 cqr->buildclk = get_tod_clock();
8e09f215
SW		 1921 cqr->status = DASD_CQR_FILLED;
1922 return cqr;
40545573
HH		 1923}
1924
1925/*
1926 * Perform Subsystem Function.
1927 * It is necessary to trigger CIO for channel revalidation since this
1928 * call might change behaviour of DASD devices.
1929 */
1930static int
12d7b107
SH		 1931dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav,
1932 unsigned long flags)
40545573 1933{
8e09f215
SW		 1934 struct dasd_ccw_req *cqr;
1935 int rc;
1936
f3eb5384 1937 cqr = dasd_eckd_build_psf_ssc(device, enable_pav);
8e09f215
SW		 1938 if (IS_ERR(cqr))
1939 return PTR_ERR(cqr);
1940
12d7b107
SH		 1941 /*
1942 * set flags e.g. turn on failfast, to prevent blocking
1943 * the calling function should handle failed requests
1944 */
1945 cqr->flags |= flags;
1946
8e09f215
SW		 1947 rc = dasd_sleep_on(cqr);
1948 if (!rc)
1949 /* trigger CIO to reprobe devices */
1950 css_schedule_reprobe();
12d7b107
SH		 1951 else if (cqr->intrc == -EAGAIN)
1952 rc = -EAGAIN;
1953
8e09f215
SW		 1954 dasd_sfree_request(cqr, cqr->memdev);
1955 return rc;
40545573
HH		 1956}
1957
1958/*
1959 * Valide storage server of current device.
1960 */
12d7b107
SH		 1961static int dasd_eckd_validate_server(struct dasd_device *device,
1962 unsigned long flags)
40545573 1963{
543691a4
SO		 1964 struct dasd_eckd_private *private = device->private;
1965 int enable_pav, rc;
40545573 1966
f9f8d02f
SH		 1967 if (private->uid.type == UA_BASE_PAV_ALIAS ||
1968 private->uid.type == UA_HYPER_PAV_ALIAS)
12d7b107 1969 return 0;
40545573 1970 if (dasd_nopav || MACHINE_IS_VM)
f3eb5384
SW		 1971 enable_pav = 0;
1972 else
1973 enable_pav = 1;
12d7b107 1974 rc = dasd_eckd_psf_ssc(device, enable_pav, flags);
eb6e199b 1975
8e79a441
HH		 1976 /* may be requested feature is not available on server,
1977 * therefore just report error and go ahead */
b8ed5dd5
SH		 1978 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x "
1979 "returned rc=%d", private->uid.ssid, rc);
12d7b107 1980 return rc;
40545573
HH		 1981}
1982
f1633031
SH		 1983/*
1984 * worker to do a validate server in case of a lost pathgroup
1985 */
1986static void dasd_eckd_do_validate_server(struct work_struct *work)
1987{
1988 struct dasd_device *device = container_of(work, struct dasd_device,
1989 kick_validate);
ea4da6ea
SH		 1990 unsigned long flags = 0;
1991
1992 set_bit(DASD_CQR_FLAGS_FAILFAST, &flags);
1993 if (dasd_eckd_validate_server(device, flags)
12d7b107
SH		 1994 == -EAGAIN) {
1995 /* schedule worker again if failed */
1996 schedule_work(&device->kick_validate);
1997 return;
1998 }
1999
f1633031
SH		 2000 dasd_put_device(device);
2001}
2002
2003static void dasd_eckd_kick_validate_server(struct dasd_device *device)
2004{
2005 dasd_get_device(device);
25e2cf1c
SH		 2006 /* exit if device not online or in offline processing */
2007 if (test_bit(DASD_FLAG_OFFLINE, &device->flags) ||
2008 device->state < DASD_STATE_ONLINE) {
2009 dasd_put_device(device);
2010 return;
2011 }
f1633031 2012 /* queue call to do_validate_server to the kernel event daemon. */
f2608cd4
SH		 2013 if (!schedule_work(&device->kick_validate))
2014 dasd_put_device(device);
f1633031
SH		 2015}
2016
a91ff09d
SH		 2017/*
2018 * return if the device is the copy relation primary if a copy relation is active
2019 */
2020static int dasd_device_is_primary(struct dasd_device *device)
2021{
2022 if (!device->copy)
2023 return 1;
2024
2025 if (device->copy->active->device == device)
2026 return 1;
2027
2028 return 0;
2029}
2030
2b43bf06
SH		 2031static int dasd_eckd_alloc_block(struct dasd_device *device)
2032{
2033 struct dasd_block *block;
2034 struct dasd_uid temp_uid;
2035
a91ff09d
SH		 2036 if (!dasd_device_is_primary(device))
2037 return 0;
2038
2b43bf06
SH		 2039 dasd_eckd_get_uid(device, &temp_uid);
2040 if (temp_uid.type == UA_BASE_DEVICE) {
2041 block = dasd_alloc_block();
2042 if (IS_ERR(block)) {
2043 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
2044 "could not allocate dasd block structure");
2045 return PTR_ERR(block);
2046 }
2047 device->block = block;
2048 block->base = device;
2049 }
2050 return 0;
2051}
2052
a91ff09d
SH		 2053static bool dasd_eckd_pprc_enabled(struct dasd_device *device)
2054{
2055 struct dasd_eckd_private *private = device->private;
2056
2057 return private->rdc_data.facilities.PPRC_enabled;
2058}
2059
3d052595
HH		 2060/*
2061 * Check device characteristics.
2062 * If the device is accessible using ECKD discipline, the device is enabled.
2063 */
1da177e4
LT		 2064static int
2065dasd_eckd_check_characteristics(struct dasd_device *device)
2066{
543691a4 2067 struct dasd_eckd_private *private = device->private;
f9f8d02f 2068 int rc, i;
33b62a30 2069 int readonly;
7c8faa86 2070 unsigned long value;
1da177e4 2071
f1633031
SH		 2072 /* setup work queue for validate server*/
2073 INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server);
59a9ed5f
SH		 2074 /* setup work queue for summary unit check */
2075 INIT_WORK(&device->suc_work, dasd_alias_handle_summary_unit_check);
f1633031 2076
454e1fa1
PO		 2077 if (!ccw_device_is_pathgroup(device->cdev)) {
2078 dev_warn(&device->cdev->dev,
2079 "A channel path group could not be established\n");
2080 return -EIO;
2081 }
2082 if (!ccw_device_is_multipath(device->cdev)) {
2083 dev_info(&device->cdev->dev,
2084 "The DASD is not operating in multipath mode\n");
2085 }
92636b15
SO		 2086 if (!private) {
2087 private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA);
2088 if (!private) {
fc19f381
SH		 2089 dev_warn(&device->cdev->dev,
2090 "Allocating memory for private DASD data "
2091 "failed\n");
1da177e4
LT		 2092 return -ENOMEM;
2093 }
543691a4 2094 device->private = private;
92636b15
SO		 2095 } else {
2096 memset(private, 0, sizeof(*private));
1da177e4
LT		 2097 }
2098 /* Invalidate status of initial analysis. */
2099 private->init_cqr_status = -1;
2100 /* Set default cache operations. */
2101 private->attrib.operation = DASD_NORMAL_CACHE;
2102 private->attrib.nr_cyl = 0;
2103
40545573
HH		 2104 /* Read Configuration Data */
2105 rc = dasd_eckd_read_conf(device);
2106 if (rc)
8e09f215 2107 goto out_err1;
40545573 2108
a521b048 2109 /* set some default values */
7c8faa86 2110 device->default_expires = DASD_EXPIRES;
1f1ee9ad 2111 device->default_retries = DASD_RETRIES;
a521b048
SH		 2112 device->path_thrhld = DASD_ECKD_PATH_THRHLD;
2113 device->path_interval = DASD_ECKD_PATH_INTERVAL;
0c1a1474 2114 device->aq_timeouts = DASD_RETRIES_MAX;
1f1ee9ad 2115
542e30ce 2116 if (private->conf.gneq) {
7c8faa86 2117 value = 1;
542e30ce 2118 for (i = 0; i < private->conf.gneq->timeout.value; i++)
7c8faa86 2119 value = 10 * value;
542e30ce 2120 value = value * private->conf.gneq->timeout.number;
7c8faa86
SH		 2121 /* do not accept useless values */
2122 if (value != 0 && value <= DASD_EXPIRES_MAX)
2123 device->default_expires = value;
2124 }
2125
a91ff09d
SH		 2126 /* Read Device Characteristics */
2127 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
2128 &private->rdc_data, 64);
2129 if (rc) {
2130 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
2131 "Read device characteristic failed, rc=%d", rc);
2132 goto out_err1;
2133 }
2134
2135 /* setup PPRC for device from devmap */
2136 rc = dasd_devmap_set_device_copy_relation(device->cdev,
2137 dasd_eckd_pprc_enabled(device));
2138 if (rc) {
2139 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
2140 "copy relation setup failed, rc=%d", rc);
2141 goto out_err1;
2142 }
2143
2b43bf06
SH		 2144 /* check if block device is needed and allocate in case */
2145 rc = dasd_eckd_alloc_block(device);
2146 if (rc)
2147 goto out_err1;
8e09f215 2148
f9f8d02f
SH		 2149 /* register lcu with alias handling, enable PAV */
2150 rc = dasd_alias_make_device_known_to_lcu(device);
2151 if (rc)
8e09f215 2152 goto out_err2;
f9f8d02f 2153
12d7b107 2154 dasd_eckd_validate_server(device, 0);
f4ac1d02
SW		 2155
2156 /* device may report different configuration data after LCU setup */
2157 rc = dasd_eckd_read_conf(device);
2158 if (rc)
2159 goto out_err3;
8e09f215 2160
74e2f211 2161 dasd_eckd_read_fc_security(device);
19508b20
JH		 2162 dasd_path_create_kobjects(device);
2163
8e09f215 2164 /* Read Feature Codes */
68d1e5f0 2165 dasd_eckd_read_features(device);
40545573 2166
c729696b 2167 /* Read Volume Information */
dd454839 2168 dasd_eckd_read_vol_info(device);
c729696b
JH		 2169
2170 /* Read Extent Pool Information */
dd454839 2171 dasd_eckd_read_ext_pool_info(device);
c729696b 2172
34cd551a
SH		 2173 if ((device->features & DASD_FEATURE_USERAW) &&
2174 !(private->rdc_data.facilities.RT_in_LR)) {
2175 dev_err(&device->cdev->dev, "The storage server does not "
2176 "support raw-track access\n");
2177 rc = -EINVAL;
2178 goto out_err3;
2179 }
2180
817f2c84 2181 /* find the valid cylinder size */
b44b0ab3
SW		 2182 if (private->rdc_data.no_cyl == LV_COMPAT_CYL &&
2183 private->rdc_data.long_no_cyl)
2184 private->real_cyl = private->rdc_data.long_no_cyl;
2185 else
2186 private->real_cyl = private->rdc_data.no_cyl;
2187
ef19298b
SW		 2188 private->fcx_max_data = get_fcx_max_data(device);
2189
33b62a30
SW		 2190 readonly = dasd_device_is_ro(device);
2191 if (readonly)
2192 set_bit(DASD_FLAG_DEVICE_RO, &device->flags);
2193
fc19f381 2194 dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) "
33b62a30 2195 "with %d cylinders, %d heads, %d sectors%s\n",
fc19f381
SH		 2196 private->rdc_data.dev_type,
2197 private->rdc_data.dev_model,
2198 private->rdc_data.cu_type,
2199 private->rdc_data.cu_model.model,
92636b15 2200 private->real_cyl,
fc19f381 2201 private->rdc_data.trk_per_cyl,
33b62a30
SW		 2202 private->rdc_data.sec_per_trk,
2203 readonly ? ", read-only device" : "");
8e09f215
SW		 2204 return 0;
2205
2206out_err3:
2207 dasd_alias_disconnect_device_from_lcu(device);
2208out_err2:
2209 dasd_free_block(device->block);
2210 device->block = NULL;
2211out_err1:
00b39f69 2212 dasd_eckd_clear_conf_data(device);
ac55ad2b 2213 dasd_path_remove_kobjects(device);
8e09f215
SW		 2214 kfree(device->private);
2215 device->private = NULL;
3d052595 2216 return rc;
1da177e4
LT		 2217}
2218
8e09f215
SW		 2219static void dasd_eckd_uncheck_device(struct dasd_device *device)
2220{
543691a4 2221 struct dasd_eckd_private *private = device->private;
4abb08c2 2222
7c6553d4
SH		 2223 if (!private)
2224 return;
2225
8e09f215 2226 dasd_alias_disconnect_device_from_lcu(device);
542e30ce
SH		 2227 private->conf.ned = NULL;
2228 private->conf.sneq = NULL;
2229 private->conf.vdsneq = NULL;
2230 private->conf.gneq = NULL;
00b39f69 2231 dasd_eckd_clear_conf_data(device);
ac55ad2b 2232 dasd_path_remove_kobjects(device);
8e09f215
SW		 2233}
2234
1da177e4
LT		 2235static struct dasd_ccw_req *
2236dasd_eckd_analysis_ccw(struct dasd_device *device)
2237{
543691a4 2238 struct dasd_eckd_private *private = device->private;
1da177e4
LT		 2239 struct eckd_count *count_data;
2240 struct LO_eckd_data *LO_data;
2241 struct dasd_ccw_req *cqr;
2242 struct ccw1 *ccw;
2243 int cplength, datasize;
2244 int i;
2245
1da177e4
LT		 2246 cplength = 8;
2247 datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data);
c5205f2f
SO		 2248 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device,
2249 NULL);
1da177e4
LT		 2250 if (IS_ERR(cqr))
2251 return cqr;
2252 ccw = cqr->cpaddr;
ce6915f5
JH		 2253 /* Define extent for the first 2 tracks. */
2254 define_extent(ccw++, cqr->data, 0, 1,
45f186be 2255 DASD_ECKD_CCW_READ_COUNT, device, 0);
8e09f215 2256 LO_data = cqr->data + sizeof(struct DE_eckd_data);
1da177e4
LT		 2257 /* Locate record for the first 4 records on track 0. */
2258 ccw[-1].flags |= CCW_FLAG_CC;
2259 locate_record(ccw++, LO_data++, 0, 0, 4,
2260 DASD_ECKD_CCW_READ_COUNT, device, 0);
2261
2262 count_data = private->count_area;
2263 for (i = 0; i < 4; i++) {
2264 ccw[-1].flags |= CCW_FLAG_CC;
2265 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
2266 ccw->flags = 0;
2267 ccw->count = 8;
b87c52e4 2268 ccw->cda = (__u32)virt_to_phys(count_data);
1da177e4
LT		 2269 ccw++;
2270 count_data++;
2271 }
2272
ce6915f5 2273 /* Locate record for the first record on track 1. */
1da177e4 2274 ccw[-1].flags |= CCW_FLAG_CC;
ce6915f5 2275 locate_record(ccw++, LO_data++, 1, 0, 1,
1da177e4
LT		 2276 DASD_ECKD_CCW_READ_COUNT, device, 0);
2277 /* Read count ccw. */
2278 ccw[-1].flags |= CCW_FLAG_CC;
2279 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
2280 ccw->flags = 0;
2281 ccw->count = 8;
b87c52e4 2282 ccw->cda = (__u32)virt_to_phys(count_data);
1da177e4 2283
8e09f215
SW		 2284 cqr->block = NULL;
2285 cqr->startdev = device;
2286 cqr->memdev = device;
eb6e199b 2287 cqr->retries = 255;
1aae0560 2288 cqr->buildclk = get_tod_clock();
1da177e4 2289 cqr->status = DASD_CQR_FILLED;
9e12e54c
JH		 2290 /* Set flags to suppress output for expected errors */
2291 set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags);
2292
1da177e4
LT		 2293 return cqr;
2294}
2295
eb6e199b
SW		 2296/* differentiate between 'no record found' and any other error */
2297static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr)
2298{
2299 char *sense;
2300 if (init_cqr->status == DASD_CQR_DONE)
2301 return INIT_CQR_OK;
2302 else if (init_cqr->status == DASD_CQR_NEED_ERP ||
2303 init_cqr->status == DASD_CQR_FAILED) {
2304 sense = dasd_get_sense(&init_cqr->irb);
2305 if (sense && (sense[1] & SNS1_NO_REC_FOUND))
2306 return INIT_CQR_UNFORMATTED;
2307 else
2308 return INIT_CQR_ERROR;
2309 } else
2310 return INIT_CQR_ERROR;
2311}
2312
1da177e4
LT		 2313/*
2314 * This is the callback function for the init_analysis cqr. It saves
2315 * the status of the initial analysis ccw before it frees it and kicks
2316 * the device to continue the startup sequence. This will call
2317 * dasd_eckd_do_analysis again (if the devices has not been marked
2318 * for deletion in the meantime).
2319 */
eb6e199b
SW		 2320static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr,
2321 void *data)
1da177e4 2322{
543691a4
SO		 2323 struct dasd_device *device = init_cqr->startdev;
2324 struct dasd_eckd_private *private = device->private;
1da177e4 2325
eb6e199b 2326 private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr);
1da177e4
LT		 2327 dasd_sfree_request(init_cqr, device);
2328 dasd_kick_device(device);
2329}
2330
eb6e199b 2331static int dasd_eckd_start_analysis(struct dasd_block *block)
1da177e4 2332{
1da177e4
LT		 2333 struct dasd_ccw_req *init_cqr;
2334
8e09f215 2335 init_cqr = dasd_eckd_analysis_ccw(block->base);
1da177e4
LT		 2336 if (IS_ERR(init_cqr))
2337 return PTR_ERR(init_cqr);
2338 init_cqr->callback = dasd_eckd_analysis_callback;
2339 init_cqr->callback_data = NULL;
2340 init_cqr->expires = 5*HZ;
eb6e199b
SW		 2341 /* first try without ERP, so we can later handle unformatted
2342 * devices as special case
2343 */
2344 clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags);
2345 init_cqr->retries = 0;
1da177e4
LT		 2346 dasd_add_request_head(init_cqr);
2347 return -EAGAIN;
2348}
2349
eb6e199b 2350static int dasd_eckd_end_analysis(struct dasd_block *block)
1da177e4 2351{
543691a4
SO		 2352 struct dasd_device *device = block->base;
2353 struct dasd_eckd_private *private = device->private;
1da177e4
LT		 2354 struct eckd_count *count_area;
2355 unsigned int sb, blk_per_trk;
2356 int status, i;
eb6e199b 2357 struct dasd_ccw_req *init_cqr;
1da177e4 2358
1da177e4
LT		 2359 status = private->init_cqr_status;
2360 private->init_cqr_status = -1;
eb6e199b
SW		 2361 if (status == INIT_CQR_ERROR) {
2362 /* try again, this time with full ERP */
2363 init_cqr = dasd_eckd_analysis_ccw(device);
2364 dasd_sleep_on(init_cqr);
2365 status = dasd_eckd_analysis_evaluation(init_cqr);
2366 dasd_sfree_request(init_cqr, device);
2367 }
2368
e4dbb0f2
SH		 2369 if (device->features & DASD_FEATURE_USERAW) {
2370 block->bp_block = DASD_RAW_BLOCKSIZE;
2371 blk_per_trk = DASD_RAW_BLOCK_PER_TRACK;
2372 block->s2b_shift = 3;
2373 goto raw;
2374 }
2375
eb6e199b
SW		 2376 if (status == INIT_CQR_UNFORMATTED) {
2377 dev_warn(&device->cdev->dev, "The DASD is not formatted\n");
1da177e4 2378 return -EMEDIUMTYPE;
eb6e199b
SW		 2379 } else if (status == INIT_CQR_ERROR) {
2380 dev_err(&device->cdev->dev,
2381 "Detecting the DASD disk layout failed because "
2382 "of an I/O error\n");
2383 return -EIO;
1da177e4
LT		 2384 }
2385
2386 private->uses_cdl = 1;
1da177e4
LT		 2387 /* Check Track 0 for Compatible Disk Layout */
2388 count_area = NULL;
2389 for (i = 0; i < 3; i++) {
2390 if (private->count_area[i].kl != 4 ||
3bc9fef9
SH		 2391 private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 ||
2392 private->count_area[i].cyl != 0 ||
2393 private->count_area[i].head != count_area_head[i] ||
2394 private->count_area[i].record != count_area_rec[i]) {
1da177e4
LT		 2395 private->uses_cdl = 0;
2396 break;
2397 }
2398 }
2399 if (i == 3)
ce6915f5 2400 count_area = &private->count_area[3];
1da177e4
LT		 2401
2402 if (private->uses_cdl == 0) {
2403 for (i = 0; i < 5; i++) {
2404 if ((private->count_area[i].kl != 0) ||
2405 (private->count_area[i].dl !=
3bc9fef9
SH		 2406 private->count_area[0].dl) ||
2407 private->count_area[i].cyl != 0 ||
2408 private->count_area[i].head != count_area_head[i] ||
2409 private->count_area[i].record != count_area_rec[i])
1da177e4
LT		 2410 break;
2411 }
2412 if (i == 5)
2413 count_area = &private->count_area[0];
2414 } else {
2415 if (private->count_area[3].record == 1)
fc19f381
SH		 2416 dev_warn(&device->cdev->dev,
2417 "Track 0 has no records following the VTOC\n");
1da177e4 2418 }
e4dbb0f2 2419
1da177e4
LT		 2420 if (count_area != NULL && count_area->kl == 0) {
2421 /* we found notthing violating our disk layout */
2422 if (dasd_check_blocksize(count_area->dl) == 0)
8e09f215 2423 block->bp_block = count_area->dl;
1da177e4 2424 }
8e09f215 2425 if (block->bp_block == 0) {
fc19f381
SH		 2426 dev_warn(&device->cdev->dev,
2427 "The disk layout of the DASD is not supported\n");
1da177e4
LT		 2428 return -EMEDIUMTYPE;
2429 }
8e09f215
SW		 2430 block->s2b_shift = 0; /* bits to shift 512 to get a block */
2431 for (sb = 512; sb < block->bp_block; sb = sb << 1)
2432 block->s2b_shift++;
1da177e4 2433
8e09f215 2434 blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block);
e4dbb0f2
SH		 2435
2436raw:
2cc9637c 2437 block->blocks = ((unsigned long) private->real_cyl *
1da177e4
LT		 2438 private->rdc_data.trk_per_cyl *
2439 blk_per_trk);
2440
fc19f381 2441 dev_info(&device->cdev->dev,
2cc9637c 2442 "DASD with %u KB/block, %lu KB total size, %u KB/track, "
fc19f381 2443 "%s\n", (block->bp_block >> 10),
2cc9637c 2444 (((unsigned long) private->real_cyl *
fc19f381
SH		 2445 private->rdc_data.trk_per_cyl *
2446 blk_per_trk * (block->bp_block >> 9)) >> 1),
2447 ((blk_per_trk * block->bp_block) >> 10),
2448 private->uses_cdl ?
2449 "compatible disk layout" : "linux disk layout");
1da177e4
LT		 2450
2451 return 0;
2452}
2453
8e09f215 2454static int dasd_eckd_do_analysis(struct dasd_block *block)
1da177e4 2455{
543691a4 2456 struct dasd_eckd_private *private = block->base->private;
1da177e4 2457
1da177e4 2458 if (private->init_cqr_status < 0)
8e09f215 2459 return dasd_eckd_start_analysis(block);
1da177e4 2460 else
8e09f215 2461 return dasd_eckd_end_analysis(block);
1da177e4
LT		 2462}
2463
d42e1712 2464static int dasd_eckd_basic_to_ready(struct dasd_device *device)
8e09f215
SW		 2465{
2466 return dasd_alias_add_device(device);
2467};
2468
2469static int dasd_eckd_online_to_ready(struct dasd_device *device)
2470{
669f3765
SH		 2471 if (cancel_work_sync(&device->reload_device))
2472 dasd_put_device(device);
2473 if (cancel_work_sync(&device->kick_validate))
2474 dasd_put_device(device);
2475
d42e1712
SH		 2476 return 0;
2477};
2478
daa991bf 2479static int dasd_eckd_basic_to_known(struct dasd_device *device)
d42e1712 2480{
8e09f215
SW		 2481 return dasd_alias_remove_device(device);
2482};
2483
1da177e4 2484static int
8e09f215 2485dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo)
1da177e4 2486{
543691a4 2487 struct dasd_eckd_private *private = block->base->private;
1da177e4 2488
8e09f215 2489 if (dasd_check_blocksize(block->bp_block) == 0) {
1da177e4 2490 geo->sectors = recs_per_track(&private->rdc_data,
8e09f215 2491 0, block->bp_block);
1da177e4
LT		 2492 }
2493 geo->cylinders = private->rdc_data.no_cyl;
2494 geo->heads = private->rdc_data.trk_per_cyl;
2495 return 0;
2496}
2497
8fd57520
JH		 2498/*
2499 * Build the TCW request for the format check
2500 */
2501static struct dasd_ccw_req *
2502dasd_eckd_build_check_tcw(struct dasd_device *base, struct format_data_t *fdata,
2503 int enable_pav, struct eckd_count *fmt_buffer,
2504 int rpt)
2505{
2506 struct dasd_eckd_private *start_priv;
2507 struct dasd_device *startdev = NULL;
2508 struct tidaw *last_tidaw = NULL;
2509 struct dasd_ccw_req *cqr;
2510 struct itcw *itcw;
2511 int itcw_size;
2512 int count;
2513 int rc;
2514 int i;
2515
2516 if (enable_pav)
2517 startdev = dasd_alias_get_start_dev(base);
2518
2519 if (!startdev)
2520 startdev = base;
2521
2522 start_priv = startdev->private;
2523
2524 count = rpt * (fdata->stop_unit - fdata->start_unit + 1);
2525
2526 /*
2527 * we're adding 'count' amount of tidaw to the itcw.
2528 * calculate the corresponding itcw_size
2529 */
2530 itcw_size = itcw_calc_size(0, count, 0);
2531
5e2b17e7 2532 cqr = dasd_fmalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev);
8fd57520
JH		 2533 if (IS_ERR(cqr))
2534 return cqr;
2535
2536 start_priv->count++;
2537
2538 itcw = itcw_init(cqr->data, itcw_size, ITCW_OP_READ, 0, count, 0);
2539 if (IS_ERR(itcw)) {
2540 rc = -EINVAL;
2541 goto out_err;
2542 }
2543
2544 cqr->cpaddr = itcw_get_tcw(itcw);
2545 rc = prepare_itcw(itcw, fdata->start_unit, fdata->stop_unit,
2546 DASD_ECKD_CCW_READ_COUNT_MT, base, startdev, 0, count,
2547 sizeof(struct eckd_count),
2548 count * sizeof(struct eckd_count), 0, rpt);
2549 if (rc)
2550 goto out_err;
2551
2552 for (i = 0; i < count; i++) {
2553 last_tidaw = itcw_add_tidaw(itcw, 0, fmt_buffer++,
2554 sizeof(struct eckd_count));
2555 if (IS_ERR(last_tidaw)) {
2556 rc = -EINVAL;
2557 goto out_err;
2558 }
2559 }
2560
2561 last_tidaw->flags |= TIDAW_FLAGS_LAST;
2562 itcw_finalize(itcw);
2563
2564 cqr->cpmode = 1;
2565 cqr->startdev = startdev;
2566 cqr->memdev = startdev;
2567 cqr->basedev = base;
2568 cqr->retries = startdev->default_retries;
2569 cqr->expires = startdev->default_expires * HZ;
2570 cqr->buildclk = get_tod_clock();
2571 cqr->status = DASD_CQR_FILLED;
2572 /* Set flags to suppress output for expected errors */
2573 set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags);
2574 set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags);
2575
2576 return cqr;
2577
2578out_err:
2579 dasd_sfree_request(cqr, startdev);
2580
2581 return ERR_PTR(rc);
2582}
2583
2584/*
2585 * Build the CCW request for the format check
2586 */
2587static struct dasd_ccw_req *
2588dasd_eckd_build_check(struct dasd_device *base, struct format_data_t *fdata,
2589 int enable_pav, struct eckd_count *fmt_buffer, int rpt)
2590{
2591 struct dasd_eckd_private *start_priv;
2592 struct dasd_eckd_private *base_priv;
2593 struct dasd_device *startdev = NULL;
2594 struct dasd_ccw_req *cqr;
2595 struct ccw1 *ccw;
2596 void *data;
2597 int cplength, datasize;
2598 int use_prefix;
2599 int count;
2600 int i;
2601
2602 if (enable_pav)
2603 startdev = dasd_alias_get_start_dev(base);
2604
2605 if (!startdev)
2606 startdev = base;
2607
2608 start_priv = startdev->private;
2609 base_priv = base->private;
2610
2611 count = rpt * (fdata->stop_unit - fdata->start_unit + 1);
2612
2613 use_prefix = base_priv->features.feature[8] & 0x01;
2614
2615 if (use_prefix) {
2616 cplength = 1;
2617 datasize = sizeof(struct PFX_eckd_data);
2618 } else {
2619 cplength = 2;
2620 datasize = sizeof(struct DE_eckd_data) +
2621 sizeof(struct LO_eckd_data);
2622 }
2623 cplength += count;
2624
5e2b17e7 2625 cqr = dasd_fmalloc_request(DASD_ECKD_MAGIC, cplength, datasize, startdev);
8fd57520
JH		 2626 if (IS_ERR(cqr))
2627 return cqr;
2628
2629 start_priv->count++;
2630 data = cqr->data;
2631 ccw = cqr->cpaddr;
2632
2633 if (use_prefix) {
2634 prefix_LRE(ccw++, data, fdata->start_unit, fdata->stop_unit,
2635 DASD_ECKD_CCW_READ_COUNT, base, startdev, 1, 0,
2636 count, 0, 0);
2637 } else {
2638 define_extent(ccw++, data, fdata->start_unit, fdata->stop_unit,
45f186be 2639 DASD_ECKD_CCW_READ_COUNT, startdev, 0);
8fd57520
JH		 2640
2641 data += sizeof(struct DE_eckd_data);
2642 ccw[-1].flags |= CCW_FLAG_CC;
2643
2644 locate_record(ccw++, data, fdata->start_unit, 0, count,
2645 DASD_ECKD_CCW_READ_COUNT, base, 0);
2646 }
2647
2648 for (i = 0; i < count; i++) {
2649 ccw[-1].flags |= CCW_FLAG_CC;
2650 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
2651 ccw->flags = CCW_FLAG_SLI;
2652 ccw->count = 8;
b87c52e4 2653 ccw->cda = (__u32)virt_to_phys(fmt_buffer);
8fd57520
JH		 2654 ccw++;
2655 fmt_buffer++;
2656 }
2657
2658 cqr->startdev = startdev;
2659 cqr->memdev = startdev;
2660 cqr->basedev = base;
2661 cqr->retries = DASD_RETRIES;
2662 cqr->expires = startdev->default_expires * HZ;
2663 cqr->buildclk = get_tod_clock();
2664 cqr->status = DASD_CQR_FILLED;
2665 /* Set flags to suppress output for expected errors */
2666 set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags);
2667
2668 return cqr;
2669}
2670
1da177e4 2671static struct dasd_ccw_req *
5e2b17e7
JH		 2672dasd_eckd_build_format(struct dasd_device *base, struct dasd_device *startdev,
2673 struct format_data_t *fdata, int enable_pav)
1da177e4 2674{
d42e1712
SH		 2675 struct dasd_eckd_private *base_priv;
2676 struct dasd_eckd_private *start_priv;
1da177e4
LT		 2677 struct dasd_ccw_req *fcp;
2678 struct eckd_count *ect;
d42e1712 2679 struct ch_t address;
1da177e4
LT		 2680 struct ccw1 *ccw;
2681 void *data;
b44b0ab3 2682 int rpt;
1da177e4 2683 int cplength, datasize;
d42e1712 2684 int i, j;
f9a28f7b
JBJ		 2685 int intensity = 0;
2686 int r0_perm;
d42e1712 2687 int nr_tracks;
18d6624e 2688 int use_prefix;
1da177e4 2689
a94fa154 2690 if (enable_pav)
29b8dd9d
SH		 2691 startdev = dasd_alias_get_start_dev(base);
2692
d42e1712
SH		 2693 if (!startdev)
2694 startdev = base;
1da177e4 2695
543691a4
SO		 2696 start_priv = startdev->private;
2697 base_priv = base->private;
d42e1712
SH		 2698
2699 rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize);
2700
2701 nr_tracks = fdata->stop_unit - fdata->start_unit + 1;
1da177e4
LT		 2702
2703 /*
2704 * fdata->intensity is a bit string that tells us what to do:
2705 * Bit 0: write record zero
2706 * Bit 1: write home address, currently not supported
2707 * Bit 2: invalidate tracks
2708 * Bit 3: use OS/390 compatible disk layout (cdl)
f9a28f7b 2709 * Bit 4: do not allow storage subsystem to modify record zero
1da177e4
LT		 2710 * Only some bit combinations do make sense.
2711 */
f9a28f7b
JBJ		 2712 if (fdata->intensity & 0x10) {
2713 r0_perm = 0;
2714 intensity = fdata->intensity & ~0x10;
2715 } else {
2716 r0_perm = 1;
2717 intensity = fdata->intensity;
2718 }
d42e1712 2719
18d6624e
SH		 2720 use_prefix = base_priv->features.feature[8] & 0x01;
2721
f9a28f7b 2722 switch (intensity) {
1da177e4
LT		 2723 case 0x00: /* Normal format */
2724 case 0x08: /* Normal format, use cdl. */
d42e1712 2725 cplength = 2 + (rpt*nr_tracks);
18d6624e
SH		 2726 if (use_prefix)
2727 datasize = sizeof(struct PFX_eckd_data) +
2728 sizeof(struct LO_eckd_data) +
2729 rpt * nr_tracks * sizeof(struct eckd_count);
2730 else
2731 datasize = sizeof(struct DE_eckd_data) +
2732 sizeof(struct LO_eckd_data) +
2733 rpt * nr_tracks * sizeof(struct eckd_count);
1da177e4
LT		 2734 break;
2735 case 0x01: /* Write record zero and format track. */
2736 case 0x09: /* Write record zero and format track, use cdl. */
d42e1712 2737 cplength = 2 + rpt * nr_tracks;
18d6624e
SH		 2738 if (use_prefix)
2739 datasize = sizeof(struct PFX_eckd_data) +
2740 sizeof(struct LO_eckd_data) +
2741 sizeof(struct eckd_count) +
2742 rpt * nr_tracks * sizeof(struct eckd_count);
2743 else
2744 datasize = sizeof(struct DE_eckd_data) +
2745 sizeof(struct LO_eckd_data) +
2746 sizeof(struct eckd_count) +
2747 rpt * nr_tracks * sizeof(struct eckd_count);
1da177e4
LT		 2748 break;
2749 case 0x04: /* Invalidate track. */
2750 case 0x0c: /* Invalidate track, use cdl. */
2751 cplength = 3;
18d6624e
SH		 2752 if (use_prefix)
2753 datasize = sizeof(struct PFX_eckd_data) +
2754 sizeof(struct LO_eckd_data) +
2755 sizeof(struct eckd_count);
2756 else
2757 datasize = sizeof(struct DE_eckd_data) +
2758 sizeof(struct LO_eckd_data) +
2759 sizeof(struct eckd_count);
1da177e4
LT		 2760 break;
2761 default:
d42e1712
SH		 2762 dev_warn(&startdev->cdev->dev,
2763 "An I/O control call used incorrect flags 0x%x\n",
2764 fdata->intensity);
1da177e4
LT		 2765 return ERR_PTR(-EINVAL);
2766 }
5e2b17e7
JH		 2767
2768 fcp = dasd_fmalloc_request(DASD_ECKD_MAGIC, cplength, datasize, startdev);
1da177e4
LT		 2769 if (IS_ERR(fcp))
2770 return fcp;
2771
d42e1712 2772 start_priv->count++;
1da177e4
LT		 2773 data = fcp->data;
2774 ccw = fcp->cpaddr;
2775
f9a28f7b 2776 switch (intensity & ~0x08) {
1da177e4 2777 case 0x00: /* Normal format. */
18d6624e
SH		 2778 if (use_prefix) {
2779 prefix(ccw++, (struct PFX_eckd_data *) data,
2780 fdata->start_unit, fdata->stop_unit,
2781 DASD_ECKD_CCW_WRITE_CKD, base, startdev);
2782 /* grant subsystem permission to format R0 */
2783 if (r0_perm)
2784 ((struct PFX_eckd_data *)data)
2785 ->define_extent.ga_extended |= 0x04;
2786 data += sizeof(struct PFX_eckd_data);
2787 } else {
2788 define_extent(ccw++, (struct DE_eckd_data *) data,
2789 fdata->start_unit, fdata->stop_unit,
45f186be 2790 DASD_ECKD_CCW_WRITE_CKD, startdev, 0);
18d6624e
SH		 2791 /* grant subsystem permission to format R0 */
2792 if (r0_perm)
2793 ((struct DE_eckd_data *) data)
2794 ->ga_extended |= 0x04;
2795 data += sizeof(struct DE_eckd_data);
2796 }
1da177e4
LT		 2797 ccw[-1].flags |= CCW_FLAG_CC;
2798 locate_record(ccw++, (struct LO_eckd_data *) data,
d42e1712
SH		 2799 fdata->start_unit, 0, rpt*nr_tracks,
2800 DASD_ECKD_CCW_WRITE_CKD, base,
1da177e4
LT		 2801 fdata->blksize);
2802 data += sizeof(struct LO_eckd_data);
2803 break;
2804 case 0x01: /* Write record zero + format track. */
18d6624e
SH		 2805 if (use_prefix) {
2806 prefix(ccw++, (struct PFX_eckd_data *) data,
2807 fdata->start_unit, fdata->stop_unit,
2808 DASD_ECKD_CCW_WRITE_RECORD_ZERO,
2809 base, startdev);
2810 data += sizeof(struct PFX_eckd_data);
2811 } else {
2812 define_extent(ccw++, (struct DE_eckd_data *) data,
2813 fdata->start_unit, fdata->stop_unit,
45f186be 2814 DASD_ECKD_CCW_WRITE_RECORD_ZERO, startdev, 0);
18d6624e
SH		 2815 data += sizeof(struct DE_eckd_data);
2816 }
1da177e4
LT		 2817 ccw[-1].flags |= CCW_FLAG_CC;
2818 locate_record(ccw++, (struct LO_eckd_data *) data,
d42e1712
SH		 2819 fdata->start_unit, 0, rpt * nr_tracks + 1,
2820 DASD_ECKD_CCW_WRITE_RECORD_ZERO, base,
2821 base->block->bp_block);
1da177e4
LT		 2822 data += sizeof(struct LO_eckd_data);
2823 break;
2824 case 0x04: /* Invalidate track. */
18d6624e
SH		 2825 if (use_prefix) {
2826 prefix(ccw++, (struct PFX_eckd_data *) data,
2827 fdata->start_unit, fdata->stop_unit,
2828 DASD_ECKD_CCW_WRITE_CKD, base, startdev);
2829 data += sizeof(struct PFX_eckd_data);
2830 } else {
2831 define_extent(ccw++, (struct DE_eckd_data *) data,
2832 fdata->start_unit, fdata->stop_unit,
45f186be 2833 DASD_ECKD_CCW_WRITE_CKD, startdev, 0);
18d6624e
SH		 2834 data += sizeof(struct DE_eckd_data);
2835 }
1da177e4
LT		 2836 ccw[-1].flags |= CCW_FLAG_CC;
2837 locate_record(ccw++, (struct LO_eckd_data *) data,
2838 fdata->start_unit, 0, 1,
d42e1712 2839 DASD_ECKD_CCW_WRITE_CKD, base, 8);
1da177e4
LT		 2840 data += sizeof(struct LO_eckd_data);
2841 break;
2842 }
d42e1712
SH		 2843
2844 for (j = 0; j < nr_tracks; j++) {
2845 /* calculate cylinder and head for the current track */
2846 set_ch_t(&address,
2847 (fdata->start_unit + j) /
2848 base_priv->rdc_data.trk_per_cyl,
2849 (fdata->start_unit + j) %
2850 base_priv->rdc_data.trk_per_cyl);
2851 if (intensity & 0x01) { /* write record zero */
1da177e4
LT		 2852 ect = (struct eckd_count *) data;
2853 data += sizeof(struct eckd_count);
b44b0ab3
SW		 2854 ect->cyl = address.cyl;
2855 ect->head = address.head;
d42e1712 2856 ect->record = 0;
1da177e4 2857 ect->kl = 0;
d42e1712 2858 ect->dl = 8;
1da177e4 2859 ccw[-1].flags |= CCW_FLAG_CC;
d42e1712 2860 ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO;
1da177e4
LT		 2861 ccw->flags = CCW_FLAG_SLI;
2862 ccw->count = 8;
b87c52e4 2863 ccw->cda = (__u32)virt_to_phys(ect);
1da177e4
LT		 2864 ccw++;
2865 }
d42e1712
SH		 2866 if ((intensity & ~0x08) & 0x04) { /* erase track */
2867 ect = (struct eckd_count *) data;
2868 data += sizeof(struct eckd_count);
2869 ect->cyl = address.cyl;
2870 ect->head = address.head;
2871 ect->record = 1;
2872 ect->kl = 0;
2873 ect->dl = 0;
2874 ccw[-1].flags |= CCW_FLAG_CC;
2875 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD;
2876 ccw->flags = CCW_FLAG_SLI;
2877 ccw->count = 8;
b87c52e4 2878 ccw->cda = (__u32)virt_to_phys(ect);
d42e1712
SH		 2879 } else { /* write remaining records */
2880 for (i = 0; i < rpt; i++) {
2881 ect = (struct eckd_count *) data;
2882 data += sizeof(struct eckd_count);
2883 ect->cyl = address.cyl;
2884 ect->head = address.head;
2885 ect->record = i + 1;
2886 ect->kl = 0;
2887 ect->dl = fdata->blksize;
2888 /*
2889 * Check for special tracks 0-1
2890 * when formatting CDL
2891 */
2892 if ((intensity & 0x08) &&
46d1c03c 2893 address.cyl == 0 && address.head == 0) {
d42e1712
SH		 2894 if (i < 3) {
2895 ect->kl = 4;
2896 ect->dl = sizes_trk0[i] - 4;
2897 }
2898 }
2899 if ((intensity & 0x08) &&
46d1c03c 2900 address.cyl == 0 && address.head == 1) {
d42e1712
SH		 2901 ect->kl = 44;
2902 ect->dl = LABEL_SIZE - 44;
2903 }
2904 ccw[-1].flags |= CCW_FLAG_CC;
2905 if (i != 0 || j == 0)
2906 ccw->cmd_code =
2907 DASD_ECKD_CCW_WRITE_CKD;
2908 else
2909 ccw->cmd_code =
2910 DASD_ECKD_CCW_WRITE_CKD_MT;
2911 ccw->flags = CCW_FLAG_SLI;
2912 ccw->count = 8;
b87c52e4 2913 ccw->cda = (__u32)virt_to_phys(ect);
ba21d0ea 2914 ccw++;
d42e1712
SH		 2915 }
2916 }
1da177e4 2917 }
d42e1712
SH		 2918
2919 fcp->startdev = startdev;
2920 fcp->memdev = startdev;
29b8dd9d 2921 fcp->basedev = base;
eb6e199b 2922 fcp->retries = 256;
d42e1712 2923 fcp->expires = startdev->default_expires * HZ;
1aae0560 2924 fcp->buildclk = get_tod_clock();
1da177e4 2925 fcp->status = DASD_CQR_FILLED;
d42e1712 2926
1da177e4
LT		 2927 return fcp;
2928}
2929
570d237c
JH		 2930/*
2931 * Wrapper function to build a CCW request depending on input data
2932 */
2933static struct dasd_ccw_req *
2934dasd_eckd_format_build_ccw_req(struct dasd_device *base,
8fd57520
JH		 2935 struct format_data_t *fdata, int enable_pav,
2936 int tpm, struct eckd_count *fmt_buffer, int rpt)
570d237c 2937{
8fd57520
JH		 2938 struct dasd_ccw_req *ccw_req;
2939
2940 if (!fmt_buffer) {
5e2b17e7 2941 ccw_req = dasd_eckd_build_format(base, NULL, fdata, enable_pav);
8fd57520
JH		 2942 } else {
2943 if (tpm)
2944 ccw_req = dasd_eckd_build_check_tcw(base, fdata,
2945 enable_pav,
2946 fmt_buffer, rpt);
2947 else
2948 ccw_req = dasd_eckd_build_check(base, fdata, enable_pav,
2949 fmt_buffer, rpt);
2950 }
2951
2952 return ccw_req;
570d237c
JH		 2953}
2954
2955/*
2956 * Sanity checks on format_data
2957 */
2958static int dasd_eckd_format_sanity_checks(struct dasd_device *base,
2959 struct format_data_t *fdata)
d42e1712 2960{
543691a4 2961 struct dasd_eckd_private *private = base->private;
d42e1712 2962
d42e1712
SH		 2963 if (fdata->start_unit >=
2964 (private->real_cyl * private->rdc_data.trk_per_cyl)) {
2965 dev_warn(&base->cdev->dev,
2966 "Start track number %u used in formatting is too big\n",
2967 fdata->start_unit);
2968 return -EINVAL;
2969 }
2970 if (fdata->stop_unit >=
2971 (private->real_cyl * private->rdc_data.trk_per_cyl)) {
2972 dev_warn(&base->cdev->dev,
2973 "Stop track number %u used in formatting is too big\n",
2974 fdata->stop_unit);
2975 return -EINVAL;
2976 }
2977 if (fdata->start_unit > fdata->stop_unit) {
2978 dev_warn(&base->cdev->dev,
2979 "Start track %u used in formatting exceeds end track\n",
2980 fdata->start_unit);
2981 return -EINVAL;
2982 }
2983 if (dasd_check_blocksize(fdata->blksize) != 0) {
2984 dev_warn(&base->cdev->dev,
2985 "The DASD cannot be formatted with block size %u\n",
2986 fdata->blksize);
2987 return -EINVAL;
2988 }
570d237c
JH		 2989 return 0;
2990}
2991
2992/*
2993 * This function will process format_data originally coming from an IOCTL
2994 */
2995static int dasd_eckd_format_process_data(struct dasd_device *base,
2996 struct format_data_t *fdata,
8fd57520
JH		 2997 int enable_pav, int tpm,
2998 struct eckd_count *fmt_buffer, int rpt,
2999 struct irb *irb)
570d237c 3000{
543691a4 3001 struct dasd_eckd_private *private = base->private;
570d237c 3002 struct dasd_ccw_req *cqr, *n;
570d237c
JH		 3003 struct list_head format_queue;
3004 struct dasd_device *device;
8fd57520 3005 char *sense = NULL;
570d237c
JH		 3006 int old_start, old_stop, format_step;
3007 int step, retry;
3008 int rc;
3009
570d237c
JH		 3010 rc = dasd_eckd_format_sanity_checks(base, fdata);
3011 if (rc)
3012 return rc;
d42e1712
SH		 3013
3014 INIT_LIST_HEAD(&format_queue);
d42e1712 3015
46d1c03c 3016 old_start = fdata->start_unit;
29b8dd9d 3017 old_stop = fdata->stop_unit;
d42e1712 3018
8fd57520
JH		 3019 if (!tpm && fmt_buffer != NULL) {
3020 /* Command Mode / Format Check */
3021 format_step = 1;
3022 } else if (tpm && fmt_buffer != NULL) {
3023 /* Transport Mode / Format Check */
3024 format_step = DASD_CQR_MAX_CCW / rpt;
3025 } else {
3026 /* Normal Formatting */
3027 format_step = DASD_CQR_MAX_CCW /
3028 recs_per_track(&private->rdc_data, 0, fdata->blksize);
3029 }
3030
46d1c03c
JH		 3031 do {
3032 retry = 0;
3033 while (fdata->start_unit <= old_stop) {
3034 step = fdata->stop_unit - fdata->start_unit + 1;
3035 if (step > format_step) {
3036 fdata->stop_unit =
3037 fdata->start_unit + format_step - 1;
3038 }
d42e1712 3039
570d237c 3040 cqr = dasd_eckd_format_build_ccw_req(base, fdata,
8fd57520
JH		 3041 enable_pav, tpm,
3042 fmt_buffer, rpt);
46d1c03c
JH		 3043 if (IS_ERR(cqr)) {
3044 rc = PTR_ERR(cqr);
3045 if (rc == -ENOMEM) {
3046 if (list_empty(&format_queue))
3047 goto out;
3048 /*
3049 * not enough memory available, start
3050 * requests retry after first requests
3051 * were finished
3052 */
3053 retry = 1;
3054 break;
3055 }
3056 goto out_err;
3057 }
3058 list_add_tail(&cqr->blocklist, &format_queue);
d42e1712 3059
8fd57520
JH		 3060 if (fmt_buffer) {
3061 step = fdata->stop_unit - fdata->start_unit + 1;
3062 fmt_buffer += rpt * step;
3063 }
46d1c03c
JH		 3064 fdata->start_unit = fdata->stop_unit + 1;
3065 fdata->stop_unit = old_stop;
d42e1712 3066 }
d42e1712 3067
46d1c03c
JH		 3068 rc = dasd_sleep_on_queue(&format_queue);
3069
3070out_err:
3071 list_for_each_entry_safe(cqr, n, &format_queue, blocklist) {
3072 device = cqr->startdev;
543691a4 3073 private = device->private;
8fd57520
JH		 3074
3075 if (cqr->status == DASD_CQR_FAILED) {
3076 /*
3077 * Only get sense data if called by format
3078 * check
3079 */
3080 if (fmt_buffer && irb) {
3081 sense = dasd_get_sense(&cqr->irb);
3082 memcpy(irb, &cqr->irb, sizeof(*irb));
3083 }
46d1c03c 3084 rc = -EIO;
8fd57520 3085 }
46d1c03c 3086 list_del_init(&cqr->blocklist);
5e2b17e7 3087 dasd_ffree_request(cqr, device);
46d1c03c
JH		 3088 private->count--;
3089 }
d42e1712 3090
8fd57520 3091 if (rc && rc != -EIO)
46d1c03c 3092 goto out;
8fd57520
JH		 3093 if (rc == -EIO) {
3094 /*
3095 * In case fewer than the expected records are on the
3096 * track, we will most likely get a 'No Record Found'
3097 * error (in command mode) or a 'File Protected' error
3098 * (in transport mode). Those particular cases shouldn't
3099 * pass the -EIO to the IOCTL, therefore reset the rc
3100 * and continue.
3101 */
3102 if (sense &&
3103 (sense[1] & SNS1_NO_REC_FOUND ||
3104 sense[1] & SNS1_FILE_PROTECTED))
3105 retry = 1;
3106 else
3107 goto out;
3108 }
d42e1712 3109
46d1c03c 3110 } while (retry);
29b8dd9d 3111
46d1c03c
JH		 3112out:
3113 fdata->start_unit = old_start;
3114 fdata->stop_unit = old_stop;
d42e1712
SH		 3115
3116 return rc;
3117}
3118
570d237c
JH		 3119static int dasd_eckd_format_device(struct dasd_device *base,
3120 struct format_data_t *fdata, int enable_pav)
3121{
8fd57520
JH		 3122 return dasd_eckd_format_process_data(base, fdata, enable_pav, 0, NULL,
3123 0, NULL);
3124}
3125
5e6bdd37 3126static bool test_and_set_format_track(struct dasd_format_entry *to_format,
71f38716 3127 struct dasd_ccw_req *cqr)
5e6bdd37 3128{
71f38716 3129 struct dasd_block *block = cqr->block;
5e6bdd37
SH		 3130 struct dasd_format_entry *format;
3131 unsigned long flags;
3132 bool rc = false;
3133
3134 spin_lock_irqsave(&block->format_lock, flags);
71f38716
SH		 3135 if (cqr->trkcount != atomic_read(&block->trkcount)) {
3136 /*
3137 * The number of formatted tracks has changed after request
3138 * start and we can not tell if the current track was involved.
3139 * To avoid data corruption treat it as if the current track is
3140 * involved
3141 */
3142 rc = true;
3143 goto out;
3144 }
5e6bdd37
SH		 3145 list_for_each_entry(format, &block->format_list, list) {
3146 if (format->track == to_format->track) {
3147 rc = true;
3148 goto out;
3149 }
3150 }
3151 list_add_tail(&to_format->list, &block->format_list);
3152
3153out:
3154 spin_unlock_irqrestore(&block->format_lock, flags);
3155 return rc;
3156}
3157
3158static void clear_format_track(struct dasd_format_entry *format,
3159 struct dasd_block *block)
3160{
3161 unsigned long flags;
3162
3163 spin_lock_irqsave(&block->format_lock, flags);
71f38716 3164 atomic_inc(&block->trkcount);
5e6bdd37
SH		 3165 list_del_init(&format->list);
3166 spin_unlock_irqrestore(&block->format_lock, flags);
3167}
3168
5e2b17e7
JH		 3169/*
3170 * Callback function to free ESE format requests.
3171 */
3172static void dasd_eckd_ese_format_cb(struct dasd_ccw_req *cqr, void *data)
3173{
3174 struct dasd_device *device = cqr->startdev;
3175 struct dasd_eckd_private *private = device->private;
5e6bdd37 3176 struct dasd_format_entry *format = data;
5e2b17e7 3177
5e6bdd37 3178 clear_format_track(format, cqr->basedev->block);
5e2b17e7
JH		 3179 private->count--;
3180 dasd_ffree_request(cqr, device);
3181}
3182
3183static struct dasd_ccw_req *
5e6bdd37
SH		 3184dasd_eckd_ese_format(struct dasd_device *startdev, struct dasd_ccw_req *cqr,
3185 struct irb *irb)
5e2b17e7
JH		 3186{
3187 struct dasd_eckd_private *private;
5e6bdd37 3188 struct dasd_format_entry *format;
5e2b17e7
JH		 3189 struct format_data_t fdata;
3190 unsigned int recs_per_trk;
3191 struct dasd_ccw_req *fcqr;
3192 struct dasd_device *base;
3193 struct dasd_block *block;
3194 unsigned int blksize;
3195 struct request *req;
3196 sector_t first_trk;
3197 sector_t last_trk;
5e6bdd37 3198 sector_t curr_trk;
5e2b17e7
JH		 3199 int rc;
3200
5b53a405 3201 req = dasd_get_callback_data(cqr);
5e6bdd37
SH		 3202 block = cqr->block;
3203 base = block->base;
5e2b17e7 3204 private = base->private;
5e2b17e7
JH		 3205 blksize = block->bp_block;
3206 recs_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
5e6bdd37 3207 format = &startdev->format_entry;
5e2b17e7
JH		 3208
3209 first_trk = blk_rq_pos(req) >> block->s2b_shift;
3210 sector_div(first_trk, recs_per_trk);
3211 last_trk =
3212 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift;
3213 sector_div(last_trk, recs_per_trk);
5e6bdd37
SH		 3214 rc = dasd_eckd_track_from_irb(irb, base, &curr_trk);
3215 if (rc)
3216 return ERR_PTR(rc);
3217
3218 if (curr_trk < first_trk || curr_trk > last_trk) {
3219 DBF_DEV_EVENT(DBF_WARNING, startdev,
3220 "ESE error track %llu not within range %llu - %llu\n",
3221 curr_trk, first_trk, last_trk);
3222 return ERR_PTR(-EINVAL);
3223 }
3224 format->track = curr_trk;
3225 /* test if track is already in formatting by another thread */
71f38716
SH		 3226 if (test_and_set_format_track(format, cqr)) {
3227 /* this is no real error so do not count down retries */
3228 cqr->retries++;
5e6bdd37 3229 return ERR_PTR(-EEXIST);
71f38716 3230 }
5e2b17e7 3231
5e6bdd37
SH		 3232 fdata.start_unit = curr_trk;
3233 fdata.stop_unit = curr_trk;
5e2b17e7
JH		 3234 fdata.blksize = blksize;
3235 fdata.intensity = private->uses_cdl ? DASD_FMT_INT_COMPAT : 0;
3236
3237 rc = dasd_eckd_format_sanity_checks(base, &fdata);
3238 if (rc)
3239 return ERR_PTR(-EINVAL);
3240
3241 /*
3242 * We're building the request with PAV disabled as we're reusing
3243 * the former startdev.
3244 */
3245 fcqr = dasd_eckd_build_format(base, startdev, &fdata, 0);
3246 if (IS_ERR(fcqr))
3247 return fcqr;
3248
3249 fcqr->callback = dasd_eckd_ese_format_cb;
5e6bdd37 3250 fcqr->callback_data = (void *) format;
5e2b17e7
JH		 3251
3252 return fcqr;
3253}
3254
3255/*
3256 * When data is read from an unformatted area of an ESE volume, this function
3257 * returns zeroed data and thereby mimics a read of zero data.
5e6bdd37
SH		 3258 *
3259 * The first unformatted track is the one that got the NRF error, the address is
3260 * encoded in the sense data.
3261 *
3262 * All tracks before have returned valid data and should not be touched.
3263 * All tracks after the unformatted track might be formatted or not. This is
3264 * currently not known, remember the processed data and return the remainder of
3265 * the request to the blocklayer in __dasd_cleanup_cqr().
5e2b17e7 3266 */
5e6bdd37 3267static int dasd_eckd_ese_read(struct dasd_ccw_req *cqr, struct irb *irb)
5e2b17e7 3268{
5e6bdd37
SH		 3269 struct dasd_eckd_private *private;
3270 sector_t first_trk, last_trk;
3271 sector_t first_blk, last_blk;
5e2b17e7 3272 unsigned int blksize, off;
5e6bdd37 3273 unsigned int recs_per_trk;
5e2b17e7
JH		 3274 struct dasd_device *base;
3275 struct req_iterator iter;
5e6bdd37
SH		 3276 struct dasd_block *block;
3277 unsigned int skip_block;
3278 unsigned int blk_count;
5e2b17e7
JH		 3279 struct request *req;
3280 struct bio_vec bv;
5e6bdd37
SH		 3281 sector_t curr_trk;
3282 sector_t end_blk;
5e2b17e7 3283 char *dst;
5e6bdd37 3284 int rc;
5e2b17e7
JH		 3285
3286 req = (struct request *) cqr->callback_data;
3287 base = cqr->block->base;
3288 blksize = base->block->bp_block;
5e6bdd37
SH		 3289 block = cqr->block;
3290 private = base->private;
3291 skip_block = 0;
3292 blk_count = 0;
3293
3294 recs_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
3295 first_trk = first_blk = blk_rq_pos(req) >> block->s2b_shift;
3296 sector_div(first_trk, recs_per_trk);
3297 last_trk = last_blk =
3298 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift;
3299 sector_div(last_trk, recs_per_trk);
3300 rc = dasd_eckd_track_from_irb(irb, base, &curr_trk);
3301 if (rc)
3302 return rc;
3303
3304 /* sanity check if the current track from sense data is valid */
3305 if (curr_trk < first_trk || curr_trk > last_trk) {
3306 DBF_DEV_EVENT(DBF_WARNING, base,
3307 "ESE error track %llu not within range %llu - %llu\n",
3308 curr_trk, first_trk, last_trk);
3309 return -EINVAL;
3310 }
3311
3312 /*
3313 * if not the first track got the NRF error we have to skip over valid
3314 * blocks
3315 */
3316 if (curr_trk != first_trk)
3317 skip_block = curr_trk * recs_per_trk - first_blk;
3318
3319 /* we have no information beyond the current track */
3320 end_blk = (curr_trk + 1) * recs_per_trk;
5e2b17e7
JH		 3321
3322 rq_for_each_segment(bv, req, iter) {
bf5fb875 3323 dst = bvec_virt(&bv);
5e2b17e7 3324 for (off = 0; off < bv.bv_len; off += blksize) {
5e6bdd37
SH		 3325 if (first_blk + blk_count >= end_blk) {
3326 cqr->proc_bytes = blk_count * blksize;
3327 return 0;
3328 }
cd68c48e 3329 if (dst && !skip_block)
5e2b17e7 3330 memset(dst, 0, blksize);
cd68c48e 3331 else
5e6bdd37 3332 skip_block--;
cd68c48e 3333 dst += blksize;
5e6bdd37 3334 blk_count++;
5e2b17e7
JH		 3335 }
3336 }
5e6bdd37 3337 return 0;
5e2b17e7
JH		 3338}
3339
8fd57520
JH		 3340/*
3341 * Helper function to count consecutive records of a single track.
3342 */
3343static int dasd_eckd_count_records(struct eckd_count *fmt_buffer, int start,
3344 int max)
3345{
3346 int head;
3347 int i;
3348
3349 head = fmt_buffer[start].head;
3350
3351 /*
3352 * There are 3 conditions where we stop counting:
3353 * - if data reoccurs (same head and record may reoccur), which may
3354 * happen due to the way DASD_ECKD_CCW_READ_COUNT works
3355 * - when the head changes, because we're iterating over several tracks
3356 * then (DASD_ECKD_CCW_READ_COUNT_MT)
3357 * - when we've reached the end of sensible data in the buffer (the
3358 * record will be 0 then)
3359 */
3360 for (i = start; i < max; i++) {
3361 if (i > start) {
3362 if ((fmt_buffer[i].head == head &&
3363 fmt_buffer[i].record == 1) ||
3364 fmt_buffer[i].head != head ||
3365 fmt_buffer[i].record == 0)
3366 break;
3367 }
3368 }
3369
3370 return i - start;
3371}
3372
3373/*
3374 * Evaluate a given range of tracks. Data like number of records, blocksize,
3375 * record ids, and key length are compared with expected data.
3376 *
3377 * If a mismatch occurs, the corresponding error bit is set, as well as
3378 * additional information, depending on the error.
3379 */
3380static void dasd_eckd_format_evaluate_tracks(struct eckd_count *fmt_buffer,
3381 struct format_check_t *cdata,
3382 int rpt_max, int rpt_exp,
3383 int trk_per_cyl, int tpm)
3384{
3385 struct ch_t geo;
3386 int max_entries;
3387 int count = 0;
3388 int trkcount;
3389 int blksize;
3390 int pos = 0;
3391 int i, j;
3392 int kl;
3393
3394 trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1;
3395 max_entries = trkcount * rpt_max;
3396
3397 for (i = cdata->expect.start_unit; i <= cdata->expect.stop_unit; i++) {
3398 /* Calculate the correct next starting position in the buffer */
3399 if (tpm) {
3400 while (fmt_buffer[pos].record == 0 &&
3401 fmt_buffer[pos].dl == 0) {
3402 if (pos++ > max_entries)
3403 break;
3404 }
3405 } else {
3406 if (i != cdata->expect.start_unit)
3407 pos += rpt_max - count;
3408 }
3409
3410 /* Calculate the expected geo values for the current track */
3411 set_ch_t(&geo, i / trk_per_cyl, i % trk_per_cyl);
3412
3413 /* Count and check number of records */
3414 count = dasd_eckd_count_records(fmt_buffer, pos, pos + rpt_max);
3415
3416 if (count < rpt_exp) {
3417 cdata->result = DASD_FMT_ERR_TOO_FEW_RECORDS;
3418 break;
3419 }
3420 if (count > rpt_exp) {
3421 cdata->result = DASD_FMT_ERR_TOO_MANY_RECORDS;
3422 break;
3423 }
3424
3425 for (j = 0; j < count; j++, pos++) {
3426 blksize = cdata->expect.blksize;
3427 kl = 0;
3428
3429 /*
3430 * Set special values when checking CDL formatted
3431 * devices.
3432 */
3433 if ((cdata->expect.intensity & 0x08) &&
3434 geo.cyl == 0 && geo.head == 0) {
3435 if (j < 3) {
3436 blksize = sizes_trk0[j] - 4;
3437 kl = 4;
3438 }
3439 }
3440 if ((cdata->expect.intensity & 0x08) &&
3441 geo.cyl == 0 && geo.head == 1) {
3442 blksize = LABEL_SIZE - 44;
3443 kl = 44;
3444 }
3445
3446 /* Check blocksize */
3447 if (fmt_buffer[pos].dl != blksize) {
3448 cdata->result = DASD_FMT_ERR_BLKSIZE;
3449 goto out;
3450 }
3451 /* Check if key length is 0 */
3452 if (fmt_buffer[pos].kl != kl) {
3453 cdata->result = DASD_FMT_ERR_KEY_LENGTH;
3454 goto out;
3455 }
3456 /* Check if record_id is correct */
3457 if (fmt_buffer[pos].cyl != geo.cyl ||
3458 fmt_buffer[pos].head != geo.head ||
3459 fmt_buffer[pos].record != (j + 1)) {
3460 cdata->result = DASD_FMT_ERR_RECORD_ID;
3461 goto out;
3462 }
3463 }
3464 }
3465
3466out:
3467 /*
3468 * In case of no errors, we need to decrease by one
3469 * to get the correct positions.
3470 */
3471 if (!cdata->result) {
3472 i--;
3473 pos--;
3474 }
3475
3476 cdata->unit = i;
3477 cdata->num_records = count;
3478 cdata->rec = fmt_buffer[pos].record;
3479 cdata->blksize = fmt_buffer[pos].dl;
3480 cdata->key_length = fmt_buffer[pos].kl;
3481}
3482
3483/*
3484 * Check the format of a range of tracks of a DASD.
3485 */
3486static int dasd_eckd_check_device_format(struct dasd_device *base,
3487 struct format_check_t *cdata,
3488 int enable_pav)
3489{
3490 struct dasd_eckd_private *private = base->private;
3491 struct eckd_count *fmt_buffer;
3492 struct irb irb;
3493 int rpt_max, rpt_exp;
3494 int fmt_buffer_size;
3495 int trk_per_cyl;
3496 int trkcount;
3497 int tpm = 0;
3498 int rc;
3499
3500 trk_per_cyl = private->rdc_data.trk_per_cyl;
3501
3502 /* Get maximum and expected amount of records per track */
3503 rpt_max = recs_per_track(&private->rdc_data, 0, 512) + 1;
3504 rpt_exp = recs_per_track(&private->rdc_data, 0, cdata->expect.blksize);
3505
3506 trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1;
3507 fmt_buffer_size = trkcount * rpt_max * sizeof(struct eckd_count);
3508
3509 fmt_buffer = kzalloc(fmt_buffer_size, GFP_KERNEL | GFP_DMA);
3510 if (!fmt_buffer)
3511 return -ENOMEM;
3512
3513 /*
3514 * A certain FICON feature subset is needed to operate in transport
3515 * mode. Additionally, the support for transport mode is implicitly
3516 * checked by comparing the buffer size with fcx_max_data. As long as
3517 * the buffer size is smaller we can operate in transport mode and
3518 * process multiple tracks. If not, only one track at once is being
3519 * processed using command mode.
3520 */
3521 if ((private->features.feature[40] & 0x04) &&
3522 fmt_buffer_size <= private->fcx_max_data)
3523 tpm = 1;
3524
3525 rc = dasd_eckd_format_process_data(base, &cdata->expect, enable_pav,
3526 tpm, fmt_buffer, rpt_max, &irb);
3527 if (rc && rc != -EIO)
3528 goto out;
3529 if (rc == -EIO) {
3530 /*
3531 * If our first attempt with transport mode enabled comes back
3532 * with an incorrect length error, we're going to retry the
3533 * check with command mode.
3534 */
3535 if (tpm && scsw_cstat(&irb.scsw) == 0x40) {
3536 tpm = 0;
3537 rc = dasd_eckd_format_process_data(base, &cdata->expect,
3538 enable_pav, tpm,
3539 fmt_buffer, rpt_max,
3540 &irb);
3541 if (rc)
3542 goto out;
3543 } else {
3544 goto out;
3545 }
3546 }
3547
3548 dasd_eckd_format_evaluate_tracks(fmt_buffer, cdata, rpt_max, rpt_exp,
3549 trk_per_cyl, tpm);
3550
3551out:
3552 kfree(fmt_buffer);
3553
3554 return rc;
570d237c
JH		 3555}
3556
8e09f215 3557static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr)
1da177e4 3558{
a2ace466
HR		 3559 if (cqr->retries < 0) {
3560 cqr->status = DASD_CQR_FAILED;
3561 return;
3562 }
8e09f215
SW		 3563 cqr->status = DASD_CQR_FILLED;
3564 if (cqr->block && (cqr->startdev != cqr->block->base)) {
3565 dasd_eckd_reset_ccw_to_base_io(cqr);
3566 cqr->startdev = cqr->block->base;
c9346151 3567 cqr->lpm = dasd_path_get_opm(cqr->block->base);
1da177e4 3568 }
8e09f215 3569};
1da177e4
LT		 3570
3571static dasd_erp_fn_t
3572dasd_eckd_erp_action(struct dasd_ccw_req * cqr)
3573{
8e09f215 3574 struct dasd_device *device = (struct dasd_device *) cqr->startdev;
1da177e4
LT		 3575 struct ccw_device *cdev = device->cdev;
3576
3577 switch (cdev->id.cu_type) {
3578 case 0x3990:
3579 case 0x2105:
3580 case 0x2107:
3581 case 0x1750:
3582 return dasd_3990_erp_action;
3583 case 0x9343:
3584 case 0x3880:
3585 default:
3586 return dasd_default_erp_action;
3587 }
3588}
3589
3590static dasd_erp_fn_t
3591dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr)
3592{
3593 return dasd_default_erp_postaction;
3594}
3595
5a27e60d
SW		 3596static void dasd_eckd_check_for_device_change(struct dasd_device *device,
3597 struct dasd_ccw_req *cqr,
3598 struct irb *irb)
8e09f215
SW		 3599{
3600 char mask;
f3eb5384 3601 char *sense = NULL;
543691a4 3602 struct dasd_eckd_private *private = device->private;
8e09f215
SW		 3603
3604 /* first of all check for state change pending interrupt */
3605 mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP;
f3eb5384 3606 if ((scsw_dstat(&irb->scsw) & mask) == mask) {
c8d1c0ff
SH		 3607 /*
3608 * for alias only, not in offline processing
3609 * and only if not suspended
3610 */
501183f2 3611 if (!device->block && private->lcu &&
25e2cf1c 3612 device->state == DASD_STATE_ONLINE &&
c8d1c0ff
SH		 3613 !test_bit(DASD_FLAG_OFFLINE, &device->flags) &&
3614 !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) {
501183f2
SH		 3615 /* schedule worker to reload device */
3616 dasd_reload_device(device);
3617 }
8e09f215
SW		 3618 dasd_generic_handle_state_change(device);
3619 return;
3620 }
3621
a5a0061f 3622 sense = dasd_get_sense(irb);
5a27e60d
SW		 3623 if (!sense)
3624 return;
3625
3626 /* summary unit check */
c7a29e56 3627 if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) &&
a5a0061f 3628 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) {
59a9ed5f
SH		 3629 if (test_and_set_bit(DASD_FLAG_SUC, &device->flags)) {
3630 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
3631 "eckd suc: device already notified");
3632 return;
3633 }
3634 sense = dasd_get_sense(irb);
3635 if (!sense) {
3636 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
3637 "eckd suc: no reason code available");
3638 clear_bit(DASD_FLAG_SUC, &device->flags);
3639 return;
3640
3641 }
3642 private->suc_reason = sense[8];
3643 DBF_DEV_EVENT(DBF_NOTICE, device, "%s %x",
3644 "eckd handle summary unit check: reason",
3645 private->suc_reason);
3646 dasd_get_device(device);
3647 if (!schedule_work(&device->suc_work))
3648 dasd_put_device(device);
3649
8e09f215
SW		 3650 return;
3651 }
3652
f60c768c 3653 /* service information message SIM */
5a27e60d 3654 if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) &&
f3eb5384
SW		 3655 ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) {
3656 dasd_3990_erp_handle_sim(device, sense);
f60c768c
SH		 3657 return;
3658 }
3659
5a27e60d
SW		 3660 /* loss of device reservation is handled via base devices only
3661 * as alias devices may be used with several bases
3662 */
c7a29e56
SW		 3663 if (device->block && (sense[27] & DASD_SENSE_BIT_0) &&
3664 (sense[7] == 0x3F) &&
5a27e60d
SW		 3665 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) &&
3666 test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) {
3667 if (device->features & DASD_FEATURE_FAILONSLCK)
3668 set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags);
3669 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags);
3670 dev_err(&device->cdev->dev,
3671 "The device reservation was lost\n");
ada3df91 3672 }
5a27e60d 3673}
f3eb5384 3674
91dc4a19
JH		 3675static int dasd_eckd_ras_sanity_checks(struct dasd_device *device,
3676 unsigned int first_trk,
3677 unsigned int last_trk)
3678{
3679 struct dasd_eckd_private *private = device->private;
3680 unsigned int trks_per_vol;
3681 int rc = 0;
3682
3683 trks_per_vol = private->real_cyl * private->rdc_data.trk_per_cyl;
3684
3685 if (first_trk >= trks_per_vol) {
3686 dev_warn(&device->cdev->dev,
3687 "Start track number %u used in the space release command is too big\n",
3688 first_trk);
3689 rc = -EINVAL;
3690 } else if (last_trk >= trks_per_vol) {
3691 dev_warn(&device->cdev->dev,
3692 "Stop track number %u used in the space release command is too big\n",
3693 last_trk);
3694 rc = -EINVAL;
3695 } else if (first_trk > last_trk) {
3696 dev_warn(&device->cdev->dev,
3697 "Start track %u used in the space release command exceeds the end track\n",
3698 first_trk);
3699 rc = -EINVAL;
3700 }
3701 return rc;
3702}
3703
3704/*
3705 * Helper function to count the amount of involved extents within a given range
3706 * with extent alignment in mind.
3707 */
3708static int count_exts(unsigned int from, unsigned int to, int trks_per_ext)
3709{
3710 int cur_pos = 0;
3711 int count = 0;
3712 int tmp;
3713
3714 if (from == to)
3715 return 1;
3716
3717 /* Count first partial extent */
3718 if (from % trks_per_ext != 0) {
3719 tmp = from + trks_per_ext - (from % trks_per_ext) - 1;
3720 if (tmp > to)
3721 tmp = to;
3722 cur_pos = tmp - from + 1;
3723 count++;
3724 }
3725 /* Count full extents */
3726 if (to - (from + cur_pos) + 1 >= trks_per_ext) {
3727 tmp = to - ((to - trks_per_ext + 1) % trks_per_ext);
3728 count += (tmp - (from + cur_pos) + 1) / trks_per_ext;
3729 cur_pos = tmp;
3730 }
3731 /* Count last partial extent */
3732 if (cur_pos < to)
3733 count++;
3734
3735 return count;
3736}
3737
c99bff34
SH		 3738static int dasd_in_copy_relation(struct dasd_device *device)
3739{
3740 struct dasd_pprc_data_sc4 *temp;
3741 int rc;
3742
3743 if (!dasd_eckd_pprc_enabled(device))
3744 return 0;
3745
3746 temp = kzalloc(sizeof(*temp), GFP_KERNEL);
3747 if (!temp)
3748 return -ENOMEM;
3749
3750 rc = dasd_eckd_query_pprc_status(device, temp);
3751 if (!rc)
3752 rc = temp->dev_info[0].state;
3753
3754 kfree(temp);
3755 return rc;
3756}
3757
91dc4a19
JH		 3758/*
3759 * Release allocated space for a given range or an entire volume.
3760 */
3761static struct dasd_ccw_req *
3762dasd_eckd_dso_ras(struct dasd_device *device, struct dasd_block *block,
3763 struct request *req, unsigned int first_trk,
3764 unsigned int last_trk, int by_extent)
3765{
3766 struct dasd_eckd_private *private = device->private;
3767 struct dasd_dso_ras_ext_range *ras_range;
3768 struct dasd_rssd_features *features;
3769 struct dasd_dso_ras_data *ras_data;
3770 u16 heads, beg_head, end_head;
3771 int cur_to_trk, cur_from_trk;
3772 struct dasd_ccw_req *cqr;
3773 u32 beg_cyl, end_cyl;
c99bff34 3774 int copy_relation;
91dc4a19
JH		 3775 struct ccw1 *ccw;
3776 int trks_per_ext;
3777 size_t ras_size;
3778 size_t size;
3779 int nr_exts;
3780 void *rq;
3781 int i;
3782
3783 if (dasd_eckd_ras_sanity_checks(device, first_trk, last_trk))
3784 return ERR_PTR(-EINVAL);
3785
c99bff34
SH		 3786 copy_relation = dasd_in_copy_relation(device);
3787 if (copy_relation < 0)
3788 return ERR_PTR(copy_relation);
3789
91dc4a19
JH		 3790 rq = req ? blk_mq_rq_to_pdu(req) : NULL;
3791
3792 features = &private->features;
3793
3794 trks_per_ext = dasd_eckd_ext_size(device) * private->rdc_data.trk_per_cyl;
3795 nr_exts = 0;
3796 if (by_extent)
3797 nr_exts = count_exts(first_trk, last_trk, trks_per_ext);
3798 ras_size = sizeof(*ras_data);
3799 size = ras_size + (nr_exts * sizeof(*ras_range));
3800
3801 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, size, device, rq);
3802 if (IS_ERR(cqr)) {
3803 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
3804 "Could not allocate RAS request");
3805 return cqr;
3806 }
3807
3808 ras_data = cqr->data;
3809 memset(ras_data, 0, size);
3810
3811 ras_data->order = DSO_ORDER_RAS;
3812 ras_data->flags.vol_type = 0; /* CKD volume */
3813 /* Release specified extents or entire volume */
3814 ras_data->op_flags.by_extent = by_extent;
3815 /*
3816 * This bit guarantees initialisation of tracks within an extent that is
3817 * not fully specified, but is only supported with a certain feature
c99bff34 3818 * subset and for devices not in a copy relation.
91dc4a19 3819 */
c99bff34
SH		 3820 if (features->feature[56] & 0x01 && !copy_relation)
3821 ras_data->op_flags.guarantee_init = 1;
3822
542e30ce
SH		 3823 ras_data->lss = private->conf.ned->ID;
3824 ras_data->dev_addr = private->conf.ned->unit_addr;
91dc4a19
JH		 3825 ras_data->nr_exts = nr_exts;
3826
3827 if (by_extent) {
3828 heads = private->rdc_data.trk_per_cyl;
3829 cur_from_trk = first_trk;
3830 cur_to_trk = first_trk + trks_per_ext -
3831 (first_trk % trks_per_ext) - 1;
3832 if (cur_to_trk > last_trk)
3833 cur_to_trk = last_trk;
3834 ras_range = (struct dasd_dso_ras_ext_range *)(cqr->data + ras_size);
3835
3836 for (i = 0; i < nr_exts; i++) {
3837 beg_cyl = cur_from_trk / heads;
3838 beg_head = cur_from_trk % heads;
3839 end_cyl = cur_to_trk / heads;
3840 end_head = cur_to_trk % heads;
3841
3842 set_ch_t(&ras_range->beg_ext, beg_cyl, beg_head);
3843 set_ch_t(&ras_range->end_ext, end_cyl, end_head);
3844
3845 cur_from_trk = cur_to_trk + 1;
3846 cur_to_trk = cur_from_trk + trks_per_ext - 1;
3847 if (cur_to_trk > last_trk)
3848 cur_to_trk = last_trk;
3849 ras_range++;
3850 }
3851 }
3852
3853 ccw = cqr->cpaddr;
b87c52e4 3854 ccw->cda = (__u32)virt_to_phys(cqr->data);
91dc4a19
JH		 3855 ccw->cmd_code = DASD_ECKD_CCW_DSO;
3856 ccw->count = size;
3857
3858 cqr->startdev = device;
3859 cqr->memdev = device;
3860 cqr->block = block;
3861 cqr->retries = 256;
3862 cqr->expires = device->default_expires * HZ;
3863 cqr->buildclk = get_tod_clock();
3864 cqr->status = DASD_CQR_FILLED;
3865
3866 return cqr;
3867}
3868
3869static int dasd_eckd_release_space_full(struct dasd_device *device)
3870{
3871 struct dasd_ccw_req *cqr;
3872 int rc;
3873
3874 cqr = dasd_eckd_dso_ras(device, NULL, NULL, 0, 0, 0);
3875 if (IS_ERR(cqr))
3876 return PTR_ERR(cqr);
3877
3878 rc = dasd_sleep_on_interruptible(cqr);
3879
3880 dasd_sfree_request(cqr, cqr->memdev);
3881
3882 return rc;
3883}
3884
3885static int dasd_eckd_release_space_trks(struct dasd_device *device,
3886 unsigned int from, unsigned int to)
3887{
3888 struct dasd_eckd_private *private = device->private;
3889 struct dasd_block *block = device->block;
3890 struct dasd_ccw_req *cqr, *n;
3891 struct list_head ras_queue;
3892 unsigned int device_exts;
3893 int trks_per_ext;
3894 int stop, step;
3895 int cur_pos;
3896 int rc = 0;
3897 int retry;
3898
3899 INIT_LIST_HEAD(&ras_queue);
3900
3901 device_exts = private->real_cyl / dasd_eckd_ext_size(device);
3902 trks_per_ext = dasd_eckd_ext_size(device) * private->rdc_data.trk_per_cyl;
3903
3904 /* Make sure device limits are not exceeded */
3905 step = trks_per_ext * min(device_exts, DASD_ECKD_RAS_EXTS_MAX);
3906 cur_pos = from;
3907
3908 do {
3909 retry = 0;
3910 while (cur_pos < to) {
3911 stop = cur_pos + step -
3912 ((cur_pos + step) % trks_per_ext) - 1;
3913 if (stop > to)
3914 stop = to;
3915
3916 cqr = dasd_eckd_dso_ras(device, NULL, NULL, cur_pos, stop, 1);
3917 if (IS_ERR(cqr)) {
3918 rc = PTR_ERR(cqr);
3919 if (rc == -ENOMEM) {
3920 if (list_empty(&ras_queue))
3921 goto out;
3922 retry = 1;
3923 break;
3924 }
3925 goto err_out;
3926 }
3927
3928 spin_lock_irq(&block->queue_lock);
3929 list_add_tail(&cqr->blocklist, &ras_queue);
3930 spin_unlock_irq(&block->queue_lock);
3931 cur_pos = stop + 1;
3932 }
3933
3934 rc = dasd_sleep_on_queue_interruptible(&ras_queue);
3935
3936err_out:
3937 list_for_each_entry_safe(cqr, n, &ras_queue, blocklist) {
3938 device = cqr->startdev;
3939 private = device->private;
3940
3941 spin_lock_irq(&block->queue_lock);
3942 list_del_init(&cqr->blocklist);
3943 spin_unlock_irq(&block->queue_lock);
3944 dasd_sfree_request(cqr, device);
3945 private->count--;
3946 }
3947 } while (retry);
3948
3949out:
3950 return rc;
3951}
3952
3953static int dasd_eckd_release_space(struct dasd_device *device,
3954 struct format_data_t *rdata)
3955{
3956 if (rdata->intensity & DASD_FMT_INT_ESE_FULL)
3957 return dasd_eckd_release_space_full(device);
3958 else if (rdata->intensity == 0)
3959 return dasd_eckd_release_space_trks(device, rdata->start_unit,
3960 rdata->stop_unit);
3961 else
3962 return -EINVAL;
3963}
3964
f3eb5384
SW		 3965static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single(
3966 struct dasd_device *startdev,
8e09f215 3967 struct dasd_block *block,
f3eb5384
SW		 3968 struct request *req,
3969 sector_t first_rec,
3970 sector_t last_rec,
3971 sector_t first_trk,
3972 sector_t last_trk,
3973 unsigned int first_offs,
3974 unsigned int last_offs,
3975 unsigned int blk_per_trk,
3976 unsigned int blksize)
1da177e4
LT		 3977{
3978 struct dasd_eckd_private *private;
3979 unsigned long *idaws;
3980 struct LO_eckd_data *LO_data;
3981 struct dasd_ccw_req *cqr;
3982 struct ccw1 *ccw;
5705f702 3983 struct req_iterator iter;
7988613b 3984 struct bio_vec bv;
1da177e4 3985 char *dst;
f3eb5384 3986 unsigned int off;
1da177e4 3987 int count, cidaw, cplength, datasize;
f3eb5384 3988 sector_t recid;
1da177e4 3989 unsigned char cmd, rcmd;
8e09f215
SW		 3990 int use_prefix;
3991 struct dasd_device *basedev;
1da177e4 3992
8e09f215 3993 basedev = block->base;
543691a4 3994 private = basedev->private;
1da177e4
LT		 3995 if (rq_data_dir(req) == READ)
3996 cmd = DASD_ECKD_CCW_READ_MT;
3997 else if (rq_data_dir(req) == WRITE)
3998 cmd = DASD_ECKD_CCW_WRITE_MT;
3999 else
4000 return ERR_PTR(-EINVAL);
f3eb5384 4001
1da177e4
LT		 4002 /* Check struct bio and count the number of blocks for the request. */
4003 count = 0;
4004 cidaw = 0;
5705f702 4005 rq_for_each_segment(bv, req, iter) {
7988613b 4006 if (bv.bv_len & (blksize - 1))
6c92e699
JA		 4007 /* Eckd can only do full blocks. */
4008 return ERR_PTR(-EINVAL);
7988613b 4009 count += bv.bv_len >> (block->s2b_shift + 9);
7988613b
KO		 4010 if (idal_is_needed (page_address(bv.bv_page), bv.bv_len))
4011 cidaw += bv.bv_len >> (block->s2b_shift + 9);
1da177e4
LT		 4012 }
4013 /* Paranoia. */
4014 if (count != last_rec - first_rec + 1)
4015 return ERR_PTR(-EINVAL);
8e09f215
SW		 4016
4017 /* use the prefix command if available */
4018 use_prefix = private->features.feature[8] & 0x01;
4019 if (use_prefix) {
4020 /* 1x prefix + number of blocks */
4021 cplength = 2 + count;
4022 /* 1x prefix + cidaws*sizeof(long) */
4023 datasize = sizeof(struct PFX_eckd_data) +
4024 sizeof(struct LO_eckd_data) +
4025 cidaw * sizeof(unsigned long);
4026 } else {
4027 /* 1x define extent + 1x locate record + number of blocks */
4028 cplength = 2 + count;
4029 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */
4030 datasize = sizeof(struct DE_eckd_data) +
4031 sizeof(struct LO_eckd_data) +
4032 cidaw * sizeof(unsigned long);
4033 }
1da177e4
LT		 4034 /* Find out the number of additional locate record ccws for cdl. */
4035 if (private->uses_cdl && first_rec < 2*blk_per_trk) {
4036 if (last_rec >= 2*blk_per_trk)
4037 count = 2*blk_per_trk - first_rec;
4038 cplength += count;
4039 datasize += count*sizeof(struct LO_eckd_data);
4040 }
4041 /* Allocate the ccw request. */
68b781fe 4042 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
c5205f2f 4043 startdev, blk_mq_rq_to_pdu(req));
1da177e4
LT		 4044 if (IS_ERR(cqr))
4045 return cqr;
4046 ccw = cqr->cpaddr;
8e09f215
SW		 4047 /* First ccw is define extent or prefix. */
4048 if (use_prefix) {
4049 if (prefix(ccw++, cqr->data, first_trk,
4050 last_trk, cmd, basedev, startdev) == -EAGAIN) {
4051 /* Clock not in sync and XRC is enabled.
4052 * Try again later.
4053 */
4054 dasd_sfree_request(cqr, startdev);
4055 return ERR_PTR(-EAGAIN);
4056 }
4057 idaws = (unsigned long *) (cqr->data +
4058 sizeof(struct PFX_eckd_data));
4059 } else {
4060 if (define_extent(ccw++, cqr->data, first_trk,
45f186be 4061 last_trk, cmd, basedev, 0) == -EAGAIN) {
8e09f215
SW		 4062 /* Clock not in sync and XRC is enabled.
4063 * Try again later.
4064 */
4065 dasd_sfree_request(cqr, startdev);
4066 return ERR_PTR(-EAGAIN);
4067 }
4068 idaws = (unsigned long *) (cqr->data +
4069 sizeof(struct DE_eckd_data));
d54853ef 4070 }
1da177e4 4071 /* Build locate_record+read/write/ccws. */
1da177e4
LT		 4072 LO_data = (struct LO_eckd_data *) (idaws + cidaw);
4073 recid = first_rec;
4074 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) {
4075 /* Only standard blocks so there is just one locate record. */
4076 ccw[-1].flags |= CCW_FLAG_CC;
4077 locate_record(ccw++, LO_data++, first_trk, first_offs + 1,
8e09f215 4078 last_rec - recid + 1, cmd, basedev, blksize);
1da177e4 4079 }
5705f702 4080 rq_for_each_segment(bv, req, iter) {
bf5fb875 4081 dst = bvec_virt(&bv);
1da177e4
LT		 4082 if (dasd_page_cache) {
4083 char *copy = kmem_cache_alloc(dasd_page_cache,
441e143e 4084 GFP_DMA | __GFP_NOWARN);
1da177e4 4085 if (copy && rq_data_dir(req) == WRITE)
7988613b 4086 memcpy(copy + bv.bv_offset, dst, bv.bv_len);
1da177e4 4087 if (copy)
7988613b 4088 dst = copy + bv.bv_offset;
1da177e4 4089 }
7988613b 4090 for (off = 0; off < bv.bv_len; off += blksize) {
1da177e4
LT		 4091 sector_t trkid = recid;
4092 unsigned int recoffs = sector_div(trkid, blk_per_trk);
4093 rcmd = cmd;
4094 count = blksize;
4095 /* Locate record for cdl special block ? */
4096 if (private->uses_cdl && recid < 2*blk_per_trk) {
4097 if (dasd_eckd_cdl_special(blk_per_trk, recid)){
4098 rcmd |= 0x8;
4099 count = dasd_eckd_cdl_reclen(recid);
ec5883ab
HH		 4100 if (count < blksize &&
4101 rq_data_dir(req) == READ)
1da177e4
LT		 4102 memset(dst + count, 0xe5,
4103 blksize - count);
4104 }
4105 ccw[-1].flags |= CCW_FLAG_CC;
4106 locate_record(ccw++, LO_data++,
4107 trkid, recoffs + 1,
8e09f215 4108 1, rcmd, basedev, count);
1da177e4
LT		 4109 }
4110 /* Locate record for standard blocks ? */
4111 if (private->uses_cdl && recid == 2*blk_per_trk) {
4112 ccw[-1].flags |= CCW_FLAG_CC;
4113 locate_record(ccw++, LO_data++,
4114 trkid, recoffs + 1,
4115 last_rec - recid + 1,
8e09f215 4116 cmd, basedev, count);
1da177e4
LT		 4117 }
4118 /* Read/write ccw. */
4119 ccw[-1].flags |= CCW_FLAG_CC;
4120 ccw->cmd_code = rcmd;
4121 ccw->count = count;
4122 if (idal_is_needed(dst, blksize)) {
b87c52e4 4123 ccw->cda = (__u32)virt_to_phys(idaws);
1da177e4
LT		 4124 ccw->flags = CCW_FLAG_IDA;
4125 idaws = idal_create_words(idaws, dst, blksize);
4126 } else {
b87c52e4 4127 ccw->cda = (__u32)virt_to_phys(dst);
1da177e4
LT		 4128 ccw->flags = 0;
4129 }
4130 ccw++;
4131 dst += blksize;
4132 recid++;
4133 }
4134 }
13de227b
HS		 4135 if (blk_noretry_request(req) ||
4136 block->base->features & DASD_FEATURE_FAILFAST)
1c01b8a5 4137 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
8e09f215
SW		 4138 cqr->startdev = startdev;
4139 cqr->memdev = startdev;
4140 cqr->block = block;
7c8faa86 4141 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
c9346151 4142 cqr->lpm = dasd_path_get_ppm(startdev);
1f1ee9ad 4143 cqr->retries = startdev->default_retries;
1aae0560 4144 cqr->buildclk = get_tod_clock();
1da177e4 4145 cqr->status = DASD_CQR_FILLED;
5e2b17e7
JH		 4146
4147 /* Set flags to suppress output for expected errors */
4148 if (dasd_eckd_is_ese(basedev)) {
4149 set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags);
4150 set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags);
4151 set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags);
4152 }
4153
1da177e4
LT		 4154 return cqr;
4155}
4156
f3eb5384
SW		 4157static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track(
4158 struct dasd_device *startdev,
4159 struct dasd_block *block,
4160 struct request *req,
4161 sector_t first_rec,
4162 sector_t last_rec,
4163 sector_t first_trk,
4164 sector_t last_trk,
4165 unsigned int first_offs,
4166 unsigned int last_offs,
4167 unsigned int blk_per_trk,
4168 unsigned int blksize)
4169{
f3eb5384
SW		 4170 unsigned long *idaws;
4171 struct dasd_ccw_req *cqr;
4172 struct ccw1 *ccw;
4173 struct req_iterator iter;
7988613b 4174 struct bio_vec bv;
f3eb5384
SW		 4175 char *dst, *idaw_dst;
4176 unsigned int cidaw, cplength, datasize;
4177 unsigned int tlf;
4178 sector_t recid;
4179 unsigned char cmd;
4180 struct dasd_device *basedev;
4181 unsigned int trkcount, count, count_to_trk_end;
4182 unsigned int idaw_len, seg_len, part_len, len_to_track_end;
4183 unsigned char new_track, end_idaw;
4184 sector_t trkid;
4185 unsigned int recoffs;
4186
4187 basedev = block->base;
f3eb5384
SW		 4188 if (rq_data_dir(req) == READ)
4189 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
4190 else if (rq_data_dir(req) == WRITE)
4191 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
4192 else
4193 return ERR_PTR(-EINVAL);
4194
4195 /* Track based I/O needs IDAWs for each page, and not just for
4196 * 64 bit addresses. We need additional idals for pages
4197 * that get filled from two tracks, so we use the number
4198 * of records as upper limit.
4199 */
4200 cidaw = last_rec - first_rec + 1;
4201 trkcount = last_trk - first_trk + 1;
4202
4203 /* 1x prefix + one read/write ccw per track */
4204 cplength = 1 + trkcount;
4205
7bf76f01 4206 datasize = sizeof(struct PFX_eckd_data) + cidaw * sizeof(unsigned long);
f3eb5384
SW		 4207
4208 /* Allocate the ccw request. */
68b781fe 4209 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
c5205f2f 4210 startdev, blk_mq_rq_to_pdu(req));
f3eb5384
SW		 4211 if (IS_ERR(cqr))
4212 return cqr;
4213 ccw = cqr->cpaddr;
4214 /* transfer length factor: how many bytes to read from the last track */
4215 if (first_trk == last_trk)
4216 tlf = last_offs - first_offs + 1;
4217 else
4218 tlf = last_offs + 1;
4219 tlf *= blksize;
4220
4221 if (prefix_LRE(ccw++, cqr->data, first_trk,
4222 last_trk, cmd, basedev, startdev,
4223 1 /* format */, first_offs + 1,
4224 trkcount, blksize,
4225 tlf) == -EAGAIN) {
4226 /* Clock not in sync and XRC is enabled.
4227 * Try again later.
4228 */
4229 dasd_sfree_request(cqr, startdev);
4230 return ERR_PTR(-EAGAIN);
4231 }
4232
4233 /*
4234 * The translation of request into ccw programs must meet the
4235 * following conditions:
4236 * - all idaws but the first and the last must address full pages
4237 * (or 2K blocks on 31-bit)
4238 * - the scope of a ccw and it's idal ends with the track boundaries
4239 */
4240 idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data));
4241 recid = first_rec;
4242 new_track = 1;
4243 end_idaw = 0;
4244 len_to_track_end = 0;
246ccea1 4245 idaw_dst = NULL;
f3eb5384
SW		 4246 idaw_len = 0;
4247 rq_for_each_segment(bv, req, iter) {
bf5fb875 4248 dst = bvec_virt(&bv);
7988613b 4249 seg_len = bv.bv_len;
f3eb5384
SW		 4250 while (seg_len) {
4251 if (new_track) {
4252 trkid = recid;
4253 recoffs = sector_div(trkid, blk_per_trk);
4254 count_to_trk_end = blk_per_trk - recoffs;
4255 count = min((last_rec - recid + 1),
4256 (sector_t)count_to_trk_end);
4257 len_to_track_end = count * blksize;
4258 ccw[-1].flags |= CCW_FLAG_CC;
4259 ccw->cmd_code = cmd;
4260 ccw->count = len_to_track_end;
b87c52e4 4261 ccw->cda = (__u32)virt_to_phys(idaws);
f3eb5384
SW		 4262 ccw->flags = CCW_FLAG_IDA;
4263 ccw++;
4264 recid += count;
4265 new_track = 0;
52db45c3
SW		 4266 /* first idaw for a ccw may start anywhere */
4267 if (!idaw_dst)
4268 idaw_dst = dst;
f3eb5384 4269 }
52db45c3
SW		 4270 /* If we start a new idaw, we must make sure that it
4271 * starts on an IDA_BLOCK_SIZE boundary.
f3eb5384
SW		 4272 * If we continue an idaw, we must make sure that the
4273 * current segment begins where the so far accumulated
4274 * idaw ends
4275 */
52db45c3 4276 if (!idaw_dst) {
b87c52e4 4277 if ((__u32)virt_to_phys(dst) & (IDA_BLOCK_SIZE - 1)) {
52db45c3
SW		 4278 dasd_sfree_request(cqr, startdev);
4279 return ERR_PTR(-ERANGE);
4280 } else
4281 idaw_dst = dst;
4282 }
f3eb5384
SW		 4283 if ((idaw_dst + idaw_len) != dst) {
4284 dasd_sfree_request(cqr, startdev);
4285 return ERR_PTR(-ERANGE);
4286 }
4287 part_len = min(seg_len, len_to_track_end);
4288 seg_len -= part_len;
4289 dst += part_len;
4290 idaw_len += part_len;
4291 len_to_track_end -= part_len;
4292 /* collected memory area ends on an IDA_BLOCK border,
4293 * -> create an idaw
4294 * idal_create_words will handle cases where idaw_len
4295 * is larger then IDA_BLOCK_SIZE
4296 */
b87c52e4 4297 if (!((__u32)virt_to_phys(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE - 1)))
f3eb5384
SW		 4298 end_idaw = 1;
4299 /* We also need to end the idaw at track end */
4300 if (!len_to_track_end) {
4301 new_track = 1;
4302 end_idaw = 1;
4303 }
4304 if (end_idaw) {
4305 idaws = idal_create_words(idaws, idaw_dst,
4306 idaw_len);
246ccea1 4307 idaw_dst = NULL;
f3eb5384
SW		 4308 idaw_len = 0;
4309 end_idaw = 0;
4310 }
4311 }
4312 }
4313
4314 if (blk_noretry_request(req) ||
4315 block->base->features & DASD_FEATURE_FAILFAST)
4316 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
4317 cqr->startdev = startdev;
4318 cqr->memdev = startdev;
4319 cqr->block = block;
7c8faa86 4320 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
c9346151 4321 cqr->lpm = dasd_path_get_ppm(startdev);
1f1ee9ad 4322 cqr->retries = startdev->default_retries;
1aae0560 4323 cqr->buildclk = get_tod_clock();
f3eb5384 4324 cqr->status = DASD_CQR_FILLED;
5e2b17e7
JH		 4325
4326 /* Set flags to suppress output for expected errors */
4327 if (dasd_eckd_is_ese(basedev))
4328 set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags);
4329
f3eb5384
SW		 4330 return cqr;
4331}
4332
4333static int prepare_itcw(struct itcw *itcw,
4334 unsigned int trk, unsigned int totrk, int cmd,
4335 struct dasd_device *basedev,
4336 struct dasd_device *startdev,
4337 unsigned int rec_on_trk, int count,
4338 unsigned int blksize,
4339 unsigned int total_data_size,
4340 unsigned int tlf,
4341 unsigned int blk_per_trk)
4342{
4343 struct PFX_eckd_data pfxdata;
4344 struct dasd_eckd_private *basepriv, *startpriv;
4345 struct DE_eckd_data *dedata;
4346 struct LRE_eckd_data *lredata;
4347 struct dcw *dcw;
4348
4349 u32 begcyl, endcyl;
4350 u16 heads, beghead, endhead;
4351 u8 pfx_cmd;
4352
4353 int rc = 0;
4354 int sector = 0;
4355 int dn, d;
4356
4357
4358 /* setup prefix data */
543691a4
SO		 4359 basepriv = basedev->private;
4360 startpriv = startdev->private;
f3eb5384
SW		 4361 dedata = &pfxdata.define_extent;
4362 lredata = &pfxdata.locate_record;
4363
4364 memset(&pfxdata, 0, sizeof(pfxdata));
4365 pfxdata.format = 1; /* PFX with LRE */
542e30ce
SH		 4366 pfxdata.base_address = basepriv->conf.ned->unit_addr;
4367 pfxdata.base_lss = basepriv->conf.ned->ID;
f3eb5384
SW		 4368 pfxdata.validity.define_extent = 1;
4369
4370 /* private uid is kept up to date, conf_data may be outdated */
da340f92
SH		 4371 if (startpriv->uid.type == UA_BASE_PAV_ALIAS)
4372 pfxdata.validity.verify_base = 1;
4373
4374 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) {
f3eb5384 4375 pfxdata.validity.verify_base = 1;
da340f92 4376 pfxdata.validity.hyper_pav = 1;
f3eb5384
SW		 4377 }
4378
4379 switch (cmd) {
4380 case DASD_ECKD_CCW_READ_TRACK_DATA:
4381 dedata->mask.perm = 0x1;
4382 dedata->attributes.operation = basepriv->attrib.operation;
4383 dedata->blk_size = blksize;
4384 dedata->ga_extended |= 0x42;
4385 lredata->operation.orientation = 0x0;
4386 lredata->operation.operation = 0x0C;
4387 lredata->auxiliary.check_bytes = 0x01;
4388 pfx_cmd = DASD_ECKD_CCW_PFX_READ;
4389 break;
4390 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
4391 dedata->mask.perm = 0x02;
4392 dedata->attributes.operation = basepriv->attrib.operation;
4393 dedata->blk_size = blksize;
5628683c 4394 rc = set_timestamp(NULL, dedata, basedev);
f3eb5384
SW		 4395 dedata->ga_extended |= 0x42;
4396 lredata->operation.orientation = 0x0;
4397 lredata->operation.operation = 0x3F;
4398 lredata->extended_operation = 0x23;
4399 lredata->auxiliary.check_bytes = 0x2;
45f186be
JH		 4400 /*
4401 * If XRC is supported the System Time Stamp is set. The
4402 * validity of the time stamp must be reflected in the prefix
4403 * data as well.
4404 */
4405 if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02)
4406 pfxdata.validity.time_stamp = 1; /* 'Time Stamp Valid' */
f3eb5384
SW		 4407 pfx_cmd = DASD_ECKD_CCW_PFX;
4408 break;
8fd57520
JH		 4409 case DASD_ECKD_CCW_READ_COUNT_MT:
4410 dedata->mask.perm = 0x1;
4411 dedata->attributes.operation = DASD_BYPASS_CACHE;
4412 dedata->ga_extended |= 0x42;
4413 dedata->blk_size = blksize;
4414 lredata->operation.orientation = 0x2;
4415 lredata->operation.operation = 0x16;
4416 lredata->auxiliary.check_bytes = 0x01;
4417 pfx_cmd = DASD_ECKD_CCW_PFX_READ;
4418 break;
f3eb5384
SW		 4419 default:
4420 DBF_DEV_EVENT(DBF_ERR, basedev,
4421 "prepare itcw, unknown opcode 0x%x", cmd);
4422 BUG();
4423 break;
4424 }
4425 if (rc)
4426 return rc;
4427
4428 dedata->attributes.mode = 0x3; /* ECKD */
4429
4430 heads = basepriv->rdc_data.trk_per_cyl;
4431 begcyl = trk / heads;
4432 beghead = trk % heads;
4433 endcyl = totrk / heads;
4434 endhead = totrk % heads;
4435
4436 /* check for sequential prestage - enhance cylinder range */
4437 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE ||
4438 dedata->attributes.operation == DASD_SEQ_ACCESS) {
4439
4440 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl)
4441 endcyl += basepriv->attrib.nr_cyl;
4442 else
4443 endcyl = (basepriv->real_cyl - 1);
4444 }
4445
4446 set_ch_t(&dedata->beg_ext, begcyl, beghead);
4447 set_ch_t(&dedata->end_ext, endcyl, endhead);
4448
4449 dedata->ep_format = 0x20; /* records per track is valid */
4450 dedata->ep_rec_per_track = blk_per_trk;
4451
4452 if (rec_on_trk) {
4453 switch (basepriv->rdc_data.dev_type) {
4454 case 0x3390:
4455 dn = ceil_quot(blksize + 6, 232);
4456 d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34);
4457 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
4458 break;
4459 case 0x3380:
4460 d = 7 + ceil_quot(blksize + 12, 32);
4461 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
4462 break;
4463 }
4464 }
4465
8fd57520
JH		 4466 if (cmd == DASD_ECKD_CCW_READ_COUNT_MT) {
4467 lredata->auxiliary.length_valid = 0;
4468 lredata->auxiliary.length_scope = 0;
4469 lredata->sector = 0xff;
4470 } else {
4471 lredata->auxiliary.length_valid = 1;
4472 lredata->auxiliary.length_scope = 1;
4473 lredata->sector = sector;
4474 }
f3eb5384
SW		 4475 lredata->auxiliary.imbedded_ccw_valid = 1;
4476 lredata->length = tlf;
4477 lredata->imbedded_ccw = cmd;
4478 lredata->count = count;
f3eb5384
SW		 4479 set_ch_t(&lredata->seek_addr, begcyl, beghead);
4480 lredata->search_arg.cyl = lredata->seek_addr.cyl;
4481 lredata->search_arg.head = lredata->seek_addr.head;
4482 lredata->search_arg.record = rec_on_trk;
4483
4484 dcw = itcw_add_dcw(itcw, pfx_cmd, 0,
4485 &pfxdata, sizeof(pfxdata), total_data_size);
757853ea 4486 return PTR_ERR_OR_ZERO(dcw);
f3eb5384
SW		 4487}
4488
4489static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track(
4490 struct dasd_device *startdev,
4491 struct dasd_block *block,
4492 struct request *req,
4493 sector_t first_rec,
4494 sector_t last_rec,
4495 sector_t first_trk,
4496 sector_t last_trk,
4497 unsigned int first_offs,
4498 unsigned int last_offs,
4499 unsigned int blk_per_trk,
4500 unsigned int blksize)
4501{
f3eb5384
SW		 4502 struct dasd_ccw_req *cqr;
4503 struct req_iterator iter;
7988613b 4504 struct bio_vec bv;
f3eb5384
SW		 4505 char *dst;
4506 unsigned int trkcount, ctidaw;
4507 unsigned char cmd;
4508 struct dasd_device *basedev;
4509 unsigned int tlf;
4510 struct itcw *itcw;
4511 struct tidaw *last_tidaw = NULL;
4512 int itcw_op;
4513 size_t itcw_size;
ef19298b
SW		 4514 u8 tidaw_flags;
4515 unsigned int seg_len, part_len, len_to_track_end;
4516 unsigned char new_track;
4517 sector_t recid, trkid;
4518 unsigned int offs;
4519 unsigned int count, count_to_trk_end;
cd10502b 4520 int ret;
f3eb5384
SW		 4521
4522 basedev = block->base;
f3eb5384
SW		 4523 if (rq_data_dir(req) == READ) {
4524 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
4525 itcw_op = ITCW_OP_READ;
4526 } else if (rq_data_dir(req) == WRITE) {
4527 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
4528 itcw_op = ITCW_OP_WRITE;
4529 } else
4530 return ERR_PTR(-EINVAL);
4531
4532 /* trackbased I/O needs address all memory via TIDAWs,
4533 * not just for 64 bit addresses. This allows us to map
4534 * each segment directly to one tidaw.
ef19298b
SW		 4535 * In the case of write requests, additional tidaws may
4536 * be needed when a segment crosses a track boundary.
f3eb5384
SW		 4537 */
4538 trkcount = last_trk - first_trk + 1;
4539 ctidaw = 0;
4540 rq_for_each_segment(bv, req, iter) {
4541 ++ctidaw;
4542 }
ef19298b
SW		 4543 if (rq_data_dir(req) == WRITE)
4544 ctidaw += (last_trk - first_trk);
f3eb5384
SW		 4545
4546 /* Allocate the ccw request. */
4547 itcw_size = itcw_calc_size(0, ctidaw, 0);
c5205f2f
SO		 4548 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev,
4549 blk_mq_rq_to_pdu(req));
f3eb5384
SW		 4550 if (IS_ERR(cqr))
4551 return cqr;
4552
f3eb5384
SW		 4553 /* transfer length factor: how many bytes to read from the last track */
4554 if (first_trk == last_trk)
4555 tlf = last_offs - first_offs + 1;
4556 else
4557 tlf = last_offs + 1;
4558 tlf *= blksize;
4559
4560 itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0);
ef19298b 4561 if (IS_ERR(itcw)) {
cd10502b
JL		 4562 ret = -EINVAL;
4563 goto out_error;
ef19298b 4564 }
f3eb5384 4565 cqr->cpaddr = itcw_get_tcw(itcw);
f3eb5384
SW		 4566 if (prepare_itcw(itcw, first_trk, last_trk,
4567 cmd, basedev, startdev,
4568 first_offs + 1,
4569 trkcount, blksize,
4570 (last_rec - first_rec + 1) * blksize,
4571 tlf, blk_per_trk) == -EAGAIN) {
4572 /* Clock not in sync and XRC is enabled.
4573 * Try again later.
4574 */
cd10502b
JL		 4575 ret = -EAGAIN;
4576 goto out_error;
f3eb5384 4577 }
d54cddb6 4578 len_to_track_end = 0;
f3eb5384
SW		 4579 /*
4580 * A tidaw can address 4k of memory, but must not cross page boundaries
4581 * We can let the block layer handle this by setting
4582 * blk_queue_segment_boundary to page boundaries and
4583 * blk_max_segment_size to page size when setting up the request queue.
ef19298b
SW		 4584 * For write requests, a TIDAW must not cross track boundaries, because
4585 * we have to set the CBC flag on the last tidaw for each track.
f3eb5384 4586 */
ef19298b
SW		 4587 if (rq_data_dir(req) == WRITE) {
4588 new_track = 1;
4589 recid = first_rec;
4590 rq_for_each_segment(bv, req, iter) {
bf5fb875 4591 dst = bvec_virt(&bv);
7988613b 4592 seg_len = bv.bv_len;
ef19298b
SW		 4593 while (seg_len) {
4594 if (new_track) {
4595 trkid = recid;
4596 offs = sector_div(trkid, blk_per_trk);
4597 count_to_trk_end = blk_per_trk - offs;
4598 count = min((last_rec - recid + 1),
4599 (sector_t)count_to_trk_end);
4600 len_to_track_end = count * blksize;
4601 recid += count;
4602 new_track = 0;
4603 }
4604 part_len = min(seg_len, len_to_track_end);
4605 seg_len -= part_len;
4606 len_to_track_end -= part_len;
4607 /* We need to end the tidaw at track end */
4608 if (!len_to_track_end) {
4609 new_track = 1;
4610 tidaw_flags = TIDAW_FLAGS_INSERT_CBC;
4611 } else
4612 tidaw_flags = 0;
4613 last_tidaw = itcw_add_tidaw(itcw, tidaw_flags,
4614 dst, part_len);
cd10502b
JL		 4615 if (IS_ERR(last_tidaw)) {
4616 ret = -EINVAL;
4617 goto out_error;
4618 }
ef19298b
SW		 4619 dst += part_len;
4620 }
4621 }
4622 } else {
4623 rq_for_each_segment(bv, req, iter) {
bf5fb875 4624 dst = bvec_virt(&bv);
ef19298b 4625 last_tidaw = itcw_add_tidaw(itcw, 0x00,
7988613b 4626 dst, bv.bv_len);
cd10502b
JL		 4627 if (IS_ERR(last_tidaw)) {
4628 ret = -EINVAL;
4629 goto out_error;
4630 }
ef19298b 4631 }
f3eb5384 4632 }
ef19298b
SW		 4633 last_tidaw->flags |= TIDAW_FLAGS_LAST;
4634 last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC;
f3eb5384
SW		 4635 itcw_finalize(itcw);
4636
4637 if (blk_noretry_request(req) ||
4638 block->base->features & DASD_FEATURE_FAILFAST)
4639 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
ef19298b 4640 cqr->cpmode = 1;
f3eb5384
SW		 4641 cqr->startdev = startdev;
4642 cqr->memdev = startdev;
4643 cqr->block = block;
7c8faa86 4644 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
c9346151 4645 cqr->lpm = dasd_path_get_ppm(startdev);
1f1ee9ad 4646 cqr->retries = startdev->default_retries;
1aae0560 4647 cqr->buildclk = get_tod_clock();
f3eb5384 4648 cqr->status = DASD_CQR_FILLED;
5e2b17e7
JH		 4649
4650 /* Set flags to suppress output for expected errors */
4651 if (dasd_eckd_is_ese(basedev)) {
4652 set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags);
4653 set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags);
4654 set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags);
4655 }
4656
f3eb5384 4657 return cqr;
cd10502b
JL		 4658out_error:
4659 dasd_sfree_request(cqr, startdev);
4660 return ERR_PTR(ret);
f3eb5384
SW		 4661}
4662
4663static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev,
4664 struct dasd_block *block,
4665 struct request *req)
4666{
ef19298b 4667 int cmdrtd, cmdwtd;
f3eb5384 4668 int use_prefix;
ef19298b 4669 int fcx_multitrack;
45b44d76 4670 struct dasd_eckd_private *private;
f3eb5384
SW		 4671 struct dasd_device *basedev;
4672 sector_t first_rec, last_rec;
4673 sector_t first_trk, last_trk;
4674 unsigned int first_offs, last_offs;
4675 unsigned int blk_per_trk, blksize;
4676 int cdlspecial;
ef19298b 4677 unsigned int data_size;
f3eb5384
SW		 4678 struct dasd_ccw_req *cqr;
4679
4680 basedev = block->base;
543691a4 4681 private = basedev->private;
f3eb5384
SW		 4682
4683 /* Calculate number of blocks/records per track. */
4684 blksize = block->bp_block;
4685 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
6fca97a9
SH		 4686 if (blk_per_trk == 0)
4687 return ERR_PTR(-EINVAL);
f3eb5384 4688 /* Calculate record id of first and last block. */
83096ebf 4689 first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift;
f3eb5384
SW		 4690 first_offs = sector_div(first_trk, blk_per_trk);
4691 last_rec = last_trk =
83096ebf 4692 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift;
f3eb5384
SW		 4693 last_offs = sector_div(last_trk, blk_per_trk);
4694 cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk);
4695
ef19298b
SW		 4696 fcx_multitrack = private->features.feature[40] & 0x20;
4697 data_size = blk_rq_bytes(req);
26a35f37
SW		 4698 if (data_size % blksize)
4699 return ERR_PTR(-EINVAL);
ef19298b
SW		 4700 /* tpm write request add CBC data on each track boundary */
4701 if (rq_data_dir(req) == WRITE)
4702 data_size += (last_trk - first_trk) * 4;
f3eb5384
SW		 4703
4704 /* is read track data and write track data in command mode supported? */
4705 cmdrtd = private->features.feature[9] & 0x20;
4706 cmdwtd = private->features.feature[12] & 0x40;
4707 use_prefix = private->features.feature[8] & 0x01;
4708
4709 cqr = NULL;
4710 if (cdlspecial || dasd_page_cache) {
4711 /* do nothing, just fall through to the cmd mode single case */
ef19298b
SW		 4712 } else if ((data_size <= private->fcx_max_data)
4713 && (fcx_multitrack || (first_trk == last_trk))) {
f3eb5384
SW		 4714 cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req,
4715 first_rec, last_rec,
4716 first_trk, last_trk,
4717 first_offs, last_offs,
4718 blk_per_trk, blksize);
ef19298b
SW		 4719 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) &&
4720 (PTR_ERR(cqr) != -ENOMEM))
f3eb5384
SW		 4721 cqr = NULL;
4722 } else if (use_prefix &&
4723 (((rq_data_dir(req) == READ) && cmdrtd) ||
4724 ((rq_data_dir(req) == WRITE) && cmdwtd))) {
4725 cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req,
4726 first_rec, last_rec,
4727 first_trk, last_trk,
4728 first_offs, last_offs,
4729 blk_per_trk, blksize);
ef19298b
SW		 4730 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) &&
4731 (PTR_ERR(cqr) != -ENOMEM))
f3eb5384
SW		 4732 cqr = NULL;
4733 }
4734 if (!cqr)
4735 cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req,
4736 first_rec, last_rec,
4737 first_trk, last_trk,
4738 first_offs, last_offs,
4739 blk_per_trk, blksize);
4740 return cqr;
4741}
4742
bbc7f7ea
JH		 4743static struct dasd_ccw_req *dasd_eckd_build_cp_raw(struct dasd_device *startdev,
4744 struct dasd_block *block,
4745 struct request *req)
e4dbb0f2 4746{
9d2be0c1
JH		 4747 sector_t start_padding_sectors, end_sector_offset, end_padding_sectors;
4748 unsigned int seg_len, len_to_track_end;
4749 unsigned int cidaw, cplength, datasize;
4750 sector_t first_trk, last_trk, sectors;
4751 struct dasd_eckd_private *base_priv;
e4dbb0f2 4752 struct dasd_device *basedev;
e4dbb0f2 4753 struct req_iterator iter;
9d2be0c1 4754 struct dasd_ccw_req *cqr;
9d2be0c1
JH		 4755 unsigned int trkcount;
4756 unsigned long *idaws;
4757 unsigned int size;
4758 unsigned char cmd;
7988613b 4759 struct bio_vec bv;
9d2be0c1
JH		 4760 struct ccw1 *ccw;
4761 int use_prefix;
4762 void *data;
e4dbb0f2 4763 char *dst;
e4dbb0f2
SH		 4764
4765 /*
4766 * raw track access needs to be mutiple of 64k and on 64k boundary
558b9ef0
SW		 4767 * For read requests we can fix an incorrect alignment by padding
4768 * the request with dummy pages.
e4dbb0f2 4769 */
558b9ef0
SW		 4770 start_padding_sectors = blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK;
4771 end_sector_offset = (blk_rq_pos(req) + blk_rq_sectors(req)) %
4772 DASD_RAW_SECTORS_PER_TRACK;
4773 end_padding_sectors = (DASD_RAW_SECTORS_PER_TRACK - end_sector_offset) %
4774 DASD_RAW_SECTORS_PER_TRACK;
4775 basedev = block->base;
4776 if ((start_padding_sectors || end_padding_sectors) &&
4777 (rq_data_dir(req) == WRITE)) {
4778 DBF_DEV_EVENT(DBF_ERR, basedev,
e78c21d1 4779 "raw write not track aligned (%llu,%llu) req %p",
558b9ef0 4780 start_padding_sectors, end_padding_sectors, req);
9d2be0c1 4781 return ERR_PTR(-EINVAL);
e4dbb0f2
SH		 4782 }
4783
4784 first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK;
4785 last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) /
4786 DASD_RAW_SECTORS_PER_TRACK;
4787 trkcount = last_trk - first_trk + 1;
e4dbb0f2
SH		 4788
4789 if (rq_data_dir(req) == READ)
4790 cmd = DASD_ECKD_CCW_READ_TRACK;
4791 else if (rq_data_dir(req) == WRITE)
4792 cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK;
9d2be0c1
JH		 4793 else
4794 return ERR_PTR(-EINVAL);
e4dbb0f2
SH		 4795
4796 /*
4797 * Raw track based I/O needs IDAWs for each page,
4798 * and not just for 64 bit addresses.
4799 */
4800 cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK;
4801
e4dbb0f2 4802 /*
9d2be0c1
JH		 4803 * struct PFX_eckd_data and struct LRE_eckd_data can have up to 2 bytes
4804 * of extended parameter. This is needed for write full track.
e4dbb0f2 4805 */
9d2be0c1
JH		 4806 base_priv = basedev->private;
4807 use_prefix = base_priv->features.feature[8] & 0x01;
4808 if (use_prefix) {
4809 cplength = 1 + trkcount;
4810 size = sizeof(struct PFX_eckd_data) + 2;
4811 } else {
4812 cplength = 2 + trkcount;
4813 size = sizeof(struct DE_eckd_data) +
4814 sizeof(struct LRE_eckd_data) + 2;
4815 }
4816 size = ALIGN(size, 8);
e4dbb0f2 4817
7bf76f01 4818 datasize = size + cidaw * sizeof(unsigned long);
e4dbb0f2
SH		 4819
4820 /* Allocate the ccw request. */
4821 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength,
c5205f2f 4822 datasize, startdev, blk_mq_rq_to_pdu(req));
e4dbb0f2 4823 if (IS_ERR(cqr))
9d2be0c1
JH		 4824 return cqr;
4825
e4dbb0f2 4826 ccw = cqr->cpaddr;
9d2be0c1 4827 data = cqr->data;
e4dbb0f2 4828
9d2be0c1
JH		 4829 if (use_prefix) {
4830 prefix_LRE(ccw++, data, first_trk, last_trk, cmd, basedev,
590ce6d9 4831 startdev, 1, 0, trkcount, 0, 0);
9d2be0c1
JH		 4832 } else {
4833 define_extent(ccw++, data, first_trk, last_trk, cmd, basedev, 0);
4834 ccw[-1].flags |= CCW_FLAG_CC;
4835
4836 data += sizeof(struct DE_eckd_data);
590ce6d9 4837 locate_record_ext(ccw++, data, first_trk, 0,
9d2be0c1 4838 trkcount, cmd, basedev, 0, 0);
e4dbb0f2
SH		 4839 }
4840
9d2be0c1 4841 idaws = (unsigned long *)(cqr->data + size);
e4dbb0f2 4842 len_to_track_end = 0;
558b9ef0
SW		 4843 if (start_padding_sectors) {
4844 ccw[-1].flags |= CCW_FLAG_CC;
4845 ccw->cmd_code = cmd;
4846 /* maximum 3390 track size */
4847 ccw->count = 57326;
4848 /* 64k map to one track */
4849 len_to_track_end = 65536 - start_padding_sectors * 512;
b87c52e4 4850 ccw->cda = (__u32)virt_to_phys(idaws);
558b9ef0
SW		 4851 ccw->flags |= CCW_FLAG_IDA;
4852 ccw->flags |= CCW_FLAG_SLI;
4853 ccw++;
4854 for (sectors = 0; sectors < start_padding_sectors; sectors += 8)
4855 idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE);
4856 }
e4dbb0f2 4857 rq_for_each_segment(bv, req, iter) {
bf5fb875 4858 dst = bvec_virt(&bv);
7988613b 4859 seg_len = bv.bv_len;
558b9ef0
SW		 4860 if (cmd == DASD_ECKD_CCW_READ_TRACK)
4861 memset(dst, 0, seg_len);
e4dbb0f2
SH		 4862 if (!len_to_track_end) {
4863 ccw[-1].flags |= CCW_FLAG_CC;
4864 ccw->cmd_code = cmd;
4865 /* maximum 3390 track size */
4866 ccw->count = 57326;
4867 /* 64k map to one track */
4868 len_to_track_end = 65536;
b87c52e4 4869 ccw->cda = (__u32)virt_to_phys(idaws);
e4dbb0f2
SH		 4870 ccw->flags |= CCW_FLAG_IDA;
4871 ccw->flags |= CCW_FLAG_SLI;
4872 ccw++;
4873 }
4874 len_to_track_end -= seg_len;
4875 idaws = idal_create_words(idaws, dst, seg_len);
4876 }
558b9ef0
SW		 4877 for (sectors = 0; sectors < end_padding_sectors; sectors += 8)
4878 idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE);
e4dbb0f2
SH		 4879 if (blk_noretry_request(req) ||
4880 block->base->features & DASD_FEATURE_FAILFAST)
4881 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
4882 cqr->startdev = startdev;
4883 cqr->memdev = startdev;
4884 cqr->block = block;
4885 cqr->expires = startdev->default_expires * HZ;
c9346151 4886 cqr->lpm = dasd_path_get_ppm(startdev);
1f1ee9ad 4887 cqr->retries = startdev->default_retries;
1aae0560 4888 cqr->buildclk = get_tod_clock();
e4dbb0f2
SH		 4889 cqr->status = DASD_CQR_FILLED;
4890
e4dbb0f2
SH		 4891 return cqr;
4892}
4893
4894
1da177e4
LT		 4895static int
4896dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req)
4897{
4898 struct dasd_eckd_private *private;
4899 struct ccw1 *ccw;
5705f702 4900 struct req_iterator iter;
7988613b 4901 struct bio_vec bv;
1da177e4
LT		 4902 char *dst, *cda;
4903 unsigned int blksize, blk_per_trk, off;
4904 sector_t recid;
5705f702 4905 int status;
1da177e4
LT		 4906
4907 if (!dasd_page_cache)
4908 goto out;
543691a4 4909 private = cqr->block->base->private;
8e09f215 4910 blksize = cqr->block->bp_block;
1da177e4 4911 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
83096ebf 4912 recid = blk_rq_pos(req) >> cqr->block->s2b_shift;
1da177e4
LT		 4913 ccw = cqr->cpaddr;
4914 /* Skip over define extent & locate record. */
4915 ccw++;
4916 if (private->uses_cdl == 0 || recid > 2*blk_per_trk)
4917 ccw++;
5705f702 4918 rq_for_each_segment(bv, req, iter) {
bf5fb875 4919 dst = bvec_virt(&bv);
7988613b 4920 for (off = 0; off < bv.bv_len; off += blksize) {
1da177e4
LT		 4921 /* Skip locate record. */
4922 if (private->uses_cdl && recid <= 2*blk_per_trk)
4923 ccw++;
4924 if (dst) {
4925 if (ccw->flags & CCW_FLAG_IDA)
b87c52e4 4926 cda = *((char **)phys_to_virt(ccw->cda));
1da177e4 4927 else
b87c52e4 4928 cda = phys_to_virt(ccw->cda);
1da177e4
LT		 4929 if (dst != cda) {
4930 if (rq_data_dir(req) == READ)
7988613b 4931 memcpy(dst, cda, bv.bv_len);
1da177e4
LT		 4932 kmem_cache_free(dasd_page_cache,
4933 (void *)((addr_t)cda & PAGE_MASK));
4934 }
4935 dst = NULL;
4936 }
4937 ccw++;
4938 recid++;
4939 }
4940 }
4941out:
4942 status = cqr->status == DASD_CQR_DONE;
8e09f215 4943 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 4944 return status;
4945}
4946
8e09f215 4947/*
f3eb5384 4948 * Modify ccw/tcw in cqr so it can be started on a base device.
8e09f215
SW		 4949 *
4950 * Note that this is not enough to restart the cqr!
4951 * Either reset cqr->startdev as well (summary unit check handling)
4952 * or restart via separate cqr (as in ERP handling).
4953 */
4954void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr)
4955{
4956 struct ccw1 *ccw;
4957 struct PFX_eckd_data *pfxdata;
f3eb5384
SW		 4958 struct tcw *tcw;
4959 struct tccb *tccb;
4960 struct dcw *dcw;
4961
4962 if (cqr->cpmode == 1) {
4963 tcw = cqr->cpaddr;
4964 tccb = tcw_get_tccb(tcw);
4965 dcw = (struct dcw *)&tccb->tca[0];
4966 pfxdata = (struct PFX_eckd_data *)&dcw->cd[0];
8e09f215
SW		 4967 pfxdata->validity.verify_base = 0;
4968 pfxdata->validity.hyper_pav = 0;
f3eb5384
SW		 4969 } else {
4970 ccw = cqr->cpaddr;
4971 pfxdata = cqr->data;
4972 if (ccw->cmd_code == DASD_ECKD_CCW_PFX) {
4973 pfxdata->validity.verify_base = 0;
4974 pfxdata->validity.hyper_pav = 0;
4975 }
8e09f215
SW		 4976 }
4977}
4978
4979#define DASD_ECKD_CHANQ_MAX_SIZE 4
4980
4981static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base,
4982 struct dasd_block *block,
4983 struct request *req)
4984{
4985 struct dasd_eckd_private *private;
964ce509 4986 struct dasd_device *startdev;
7e64db15 4987 unsigned long flags;
964ce509 4988 struct dasd_ccw_req *cqr;
8e09f215 4989
964ce509 4990 startdev = dasd_alias_get_start_dev(base);
8e09f215
SW		 4991 if (!startdev)
4992 startdev = base;
543691a4 4993 private = startdev->private;
8e09f215
SW		 4994 if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE)
4995 return ERR_PTR(-EBUSY);
4996
4997 spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags);
4998 private->count++;
e4dbb0f2 4999 if ((base->features & DASD_FEATURE_USERAW))
bbc7f7ea 5000 cqr = dasd_eckd_build_cp_raw(startdev, block, req);
e4dbb0f2
SH		 5001 else
5002 cqr = dasd_eckd_build_cp(startdev, block, req);
8e09f215
SW		 5003 if (IS_ERR(cqr))
5004 private->count--;
5005 spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags);
5006 return cqr;
5007}
5008
5009static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr,
5010 struct request *req)
5011{
5012 struct dasd_eckd_private *private;
5013 unsigned long flags;
5014
5015 spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags);
543691a4 5016 private = cqr->memdev->private;
8e09f215
SW		 5017 private->count--;
5018 spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags);
5019 return dasd_eckd_free_cp(cqr, req);
5020}
5021
1da177e4
LT		 5022static int
5023dasd_eckd_fill_info(struct dasd_device * device,
5024 struct dasd_information2_t * info)
5025{
543691a4 5026 struct dasd_eckd_private *private = device->private;
1da177e4 5027
1da177e4
LT		 5028 info->label_block = 2;
5029 info->FBA_layout = private->uses_cdl ? 0 : 1;
5030 info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL;
543691a4 5031 info->characteristics_size = sizeof(private->rdc_data);
1da177e4 5032 memcpy(info->characteristics, &private->rdc_data,
543691a4 5033 sizeof(private->rdc_data));
542e30ce
SH		 5034 info->confdata_size = min_t(unsigned long, private->conf.len,
5035 sizeof(info->configuration_data));
5036 memcpy(info->configuration_data, private->conf.data,
4abb08c2 5037 info->confdata_size);
1da177e4
LT		 5038 return 0;
5039}
5040
5041/*
5042 * SECTION: ioctl functions for eckd devices.
5043 */
5044
5045/*
5046 * Release device ioctl.
138c014d 5047 * Buils a channel programm to releases a prior reserved
1da177e4
LT		 5048 * (see dasd_eckd_reserve) device.
5049 */
5050static int
1107ccfb 5051dasd_eckd_release(struct dasd_device *device)
1da177e4 5052{
1da177e4
LT		 5053 struct dasd_ccw_req *cqr;
5054 int rc;
f3eb5384 5055 struct ccw1 *ccw;
f932bcea 5056 int useglobal;
1da177e4
LT		 5057
5058 if (!capable(CAP_SYS_ADMIN))
5059 return -EACCES;
5060
f932bcea 5061 useglobal = 0;
c5205f2f 5062 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL);
1da177e4 5063 if (IS_ERR(cqr)) {
f932bcea
SW		 5064 mutex_lock(&dasd_reserve_mutex);
5065 useglobal = 1;
5066 cqr = &dasd_reserve_req->cqr;
5067 memset(cqr, 0, sizeof(*cqr));
5068 memset(&dasd_reserve_req->ccw, 0,
5069 sizeof(dasd_reserve_req->ccw));
5070 cqr->cpaddr = &dasd_reserve_req->ccw;
5071 cqr->data = &dasd_reserve_req->data;
5072 cqr->magic = DASD_ECKD_MAGIC;
1da177e4 5073 }
f3eb5384
SW		 5074 ccw = cqr->cpaddr;
5075 ccw->cmd_code = DASD_ECKD_CCW_RELEASE;
5076 ccw->flags |= CCW_FLAG_SLI;
5077 ccw->count = 32;
b87c52e4 5078 ccw->cda = (__u32)virt_to_phys(cqr->data);
8e09f215
SW		 5079 cqr->startdev = device;
5080 cqr->memdev = device;
1da177e4 5081 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1c01b8a5 5082 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
336c340b 5083 cqr->retries = 2; /* set retry counter to enable basic ERP */
1da177e4 5084 cqr->expires = 2 * HZ;
1aae0560 5085 cqr->buildclk = get_tod_clock();
1da177e4
LT		 5086 cqr->status = DASD_CQR_FILLED;
5087
5088 rc = dasd_sleep_on_immediatly(cqr);
5a27e60d
SW		 5089 if (!rc)
5090 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags);
1da177e4 5091
f932bcea
SW		 5092 if (useglobal)
5093 mutex_unlock(&dasd_reserve_mutex);
5094 else
5095 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 5096 return rc;
5097}
5098
5099/*
5100 * Reserve device ioctl.
5101 * Options are set to 'synchronous wait for interrupt' and
138c014d
HH		 5102 * 'timeout the request'. This leads to a terminate IO if
5103 * the interrupt is outstanding for a certain time.
1da177e4
LT		 5104 */
5105static int
1107ccfb 5106dasd_eckd_reserve(struct dasd_device *device)
1da177e4 5107{
1da177e4
LT		 5108 struct dasd_ccw_req *cqr;
5109 int rc;
f3eb5384 5110 struct ccw1 *ccw;
f932bcea 5111 int useglobal;
1da177e4
LT		 5112
5113 if (!capable(CAP_SYS_ADMIN))
5114 return -EACCES;
5115
f932bcea 5116 useglobal = 0;
c5205f2f 5117 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL);
1da177e4 5118 if (IS_ERR(cqr)) {
f932bcea
SW		 5119 mutex_lock(&dasd_reserve_mutex);
5120 useglobal = 1;
5121 cqr = &dasd_reserve_req->cqr;
5122 memset(cqr, 0, sizeof(*cqr));
5123 memset(&dasd_reserve_req->ccw, 0,
5124 sizeof(dasd_reserve_req->ccw));
5125 cqr->cpaddr = &dasd_reserve_req->ccw;
5126 cqr->data = &dasd_reserve_req->data;
5127 cqr->magic = DASD_ECKD_MAGIC;
1da177e4 5128 }
f3eb5384
SW		 5129 ccw = cqr->cpaddr;
5130 ccw->cmd_code = DASD_ECKD_CCW_RESERVE;
5131 ccw->flags |= CCW_FLAG_SLI;
5132 ccw->count = 32;
b87c52e4 5133 ccw->cda = (__u32)virt_to_phys(cqr->data);
8e09f215
SW		 5134 cqr->startdev = device;
5135 cqr->memdev = device;
1da177e4 5136 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1c01b8a5 5137 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
336c340b 5138 cqr->retries = 2; /* set retry counter to enable basic ERP */
1da177e4 5139 cqr->expires = 2 * HZ;
1aae0560 5140 cqr->buildclk = get_tod_clock();
1da177e4
LT		 5141 cqr->status = DASD_CQR_FILLED;
5142
5143 rc = dasd_sleep_on_immediatly(cqr);
5a27e60d
SW		 5144 if (!rc)
5145 set_bit(DASD_FLAG_IS_RESERVED, &device->flags);
1da177e4 5146
f932bcea
SW		 5147 if (useglobal)
5148 mutex_unlock(&dasd_reserve_mutex);
5149 else
5150 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 5151 return rc;
5152}
5153
5154/*
5155 * Steal lock ioctl - unconditional reserve device.
138c014d 5156 * Buils a channel programm to break a device's reservation.
1da177e4
LT		 5157 * (unconditional reserve)
5158 */
5159static int
1107ccfb 5160dasd_eckd_steal_lock(struct dasd_device *device)
1da177e4 5161{
1da177e4
LT		 5162 struct dasd_ccw_req *cqr;
5163 int rc;
f3eb5384 5164 struct ccw1 *ccw;
f932bcea 5165 int useglobal;
1da177e4
LT		 5166
5167 if (!capable(CAP_SYS_ADMIN))
5168 return -EACCES;
5169
f932bcea 5170 useglobal = 0;
c5205f2f 5171 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL);
1da177e4 5172 if (IS_ERR(cqr)) {
f932bcea
SW		 5173 mutex_lock(&dasd_reserve_mutex);
5174 useglobal = 1;
5175 cqr = &dasd_reserve_req->cqr;
5176 memset(cqr, 0, sizeof(*cqr));
5177 memset(&dasd_reserve_req->ccw, 0,
5178 sizeof(dasd_reserve_req->ccw));
5179 cqr->cpaddr = &dasd_reserve_req->ccw;
5180 cqr->data = &dasd_reserve_req->data;
5181 cqr->magic = DASD_ECKD_MAGIC;
1da177e4 5182 }
f3eb5384
SW		 5183 ccw = cqr->cpaddr;
5184 ccw->cmd_code = DASD_ECKD_CCW_SLCK;
5185 ccw->flags |= CCW_FLAG_SLI;
5186 ccw->count = 32;
b87c52e4 5187 ccw->cda = (__u32)virt_to_phys(cqr->data);
8e09f215
SW		 5188 cqr->startdev = device;
5189 cqr->memdev = device;
1da177e4 5190 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1c01b8a5 5191 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
336c340b 5192 cqr->retries = 2; /* set retry counter to enable basic ERP */
1da177e4 5193 cqr->expires = 2 * HZ;
1aae0560 5194 cqr->buildclk = get_tod_clock();
1da177e4
LT		 5195 cqr->status = DASD_CQR_FILLED;
5196
5197 rc = dasd_sleep_on_immediatly(cqr);
5a27e60d
SW		 5198 if (!rc)
5199 set_bit(DASD_FLAG_IS_RESERVED, &device->flags);
1da177e4 5200
f932bcea
SW		 5201 if (useglobal)
5202 mutex_unlock(&dasd_reserve_mutex);
5203 else
5204 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 5205 return rc;
5206}
5207
196339f1
SW		 5208/*
5209 * SNID - Sense Path Group ID
5210 * This ioctl may be used in situations where I/O is stalled due to
5211 * a reserve, so if the normal dasd_smalloc_request fails, we use the
5212 * preallocated dasd_reserve_req.
5213 */
5214static int dasd_eckd_snid(struct dasd_device *device,
5215 void __user *argp)
5216{
5217 struct dasd_ccw_req *cqr;
5218 int rc;
5219 struct ccw1 *ccw;
5220 int useglobal;
5221 struct dasd_snid_ioctl_data usrparm;
5222
5223 if (!capable(CAP_SYS_ADMIN))
5224 return -EACCES;
5225
5226 if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
5227 return -EFAULT;
5228
5229 useglobal = 0;
5230 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1,
c5205f2f
SO		 5231 sizeof(struct dasd_snid_data), device,
5232 NULL);
196339f1
SW		 5233 if (IS_ERR(cqr)) {
5234 mutex_lock(&dasd_reserve_mutex);
5235 useglobal = 1;
5236 cqr = &dasd_reserve_req->cqr;
5237 memset(cqr, 0, sizeof(*cqr));
5238 memset(&dasd_reserve_req->ccw, 0,
5239 sizeof(dasd_reserve_req->ccw));
5240 cqr->cpaddr = &dasd_reserve_req->ccw;
5241 cqr->data = &dasd_reserve_req->data;
5242 cqr->magic = DASD_ECKD_MAGIC;
5243 }
5244 ccw = cqr->cpaddr;
5245 ccw->cmd_code = DASD_ECKD_CCW_SNID;
5246 ccw->flags |= CCW_FLAG_SLI;
5247 ccw->count = 12;
b87c52e4 5248 ccw->cda = (__u32)virt_to_phys(cqr->data);
196339f1
SW		 5249 cqr->startdev = device;
5250 cqr->memdev = device;
5251 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
5252 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
5a27e60d 5253 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags);
196339f1
SW		 5254 cqr->retries = 5;
5255 cqr->expires = 10 * HZ;
1aae0560 5256 cqr->buildclk = get_tod_clock();
196339f1
SW		 5257 cqr->status = DASD_CQR_FILLED;
5258 cqr->lpm = usrparm.path_mask;
5259
5260 rc = dasd_sleep_on_immediatly(cqr);
5261 /* verify that I/O processing didn't modify the path mask */
5262 if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask))
5263 rc = -EIO;
5264 if (!rc) {
5265 usrparm.data = *((struct dasd_snid_data *)cqr->data);
5266 if (copy_to_user(argp, &usrparm, sizeof(usrparm)))
5267 rc = -EFAULT;
5268 }
5269
5270 if (useglobal)
5271 mutex_unlock(&dasd_reserve_mutex);
5272 else
5273 dasd_sfree_request(cqr, cqr->memdev);
5274 return rc;
5275}
5276
1da177e4
LT		 5277/*
5278 * Read performance statistics
5279 */
5280static int
1107ccfb 5281dasd_eckd_performance(struct dasd_device *device, void __user *argp)
1da177e4 5282{
1da177e4
LT		 5283 struct dasd_psf_prssd_data *prssdp;
5284 struct dasd_rssd_perf_stats_t *stats;
5285 struct dasd_ccw_req *cqr;
5286 struct ccw1 *ccw;
5287 int rc;
5288
68b781fe 5289 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
8e09f215
SW		 5290 (sizeof(struct dasd_psf_prssd_data) +
5291 sizeof(struct dasd_rssd_perf_stats_t)),
c5205f2f 5292 device, NULL);
1da177e4 5293 if (IS_ERR(cqr)) {
fc19f381 5294 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 5295 "Could not allocate initialization request");
5296 return PTR_ERR(cqr);
5297 }
8e09f215
SW		 5298 cqr->startdev = device;
5299 cqr->memdev = device;
1da177e4 5300 cqr->retries = 0;
eb6e199b 5301 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1da177e4
LT		 5302 cqr->expires = 10 * HZ;
5303
5304 /* Prepare for Read Subsystem Data */
5305 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
8e09f215 5306 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
1da177e4 5307 prssdp->order = PSF_ORDER_PRSSD;
5d67d164 5308 prssdp->suborder = 0x01; /* Performance Statistics */
1da177e4
LT		 5309 prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */
5310
5311 ccw = cqr->cpaddr;
5312 ccw->cmd_code = DASD_ECKD_CCW_PSF;
8e09f215 5313 ccw->count = sizeof(struct dasd_psf_prssd_data);
1da177e4 5314 ccw->flags |= CCW_FLAG_CC;
b87c52e4 5315 ccw->cda = (__u32)virt_to_phys(prssdp);
1da177e4
LT		 5316
5317 /* Read Subsystem Data - Performance Statistics */
5318 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
8e09f215 5319 memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t));
1da177e4
LT		 5320
5321 ccw++;
5322 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
8e09f215 5323 ccw->count = sizeof(struct dasd_rssd_perf_stats_t);
b87c52e4 5324 ccw->cda = (__u32)virt_to_phys(stats);
1da177e4 5325
1aae0560 5326 cqr->buildclk = get_tod_clock();
1da177e4
LT		 5327 cqr->status = DASD_CQR_FILLED;
5328 rc = dasd_sleep_on(cqr);
5329 if (rc == 0) {
1da177e4
LT		 5330 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
5331 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
1107ccfb
CH		 5332 if (copy_to_user(argp, stats,
5333 sizeof(struct dasd_rssd_perf_stats_t)))
5334 rc = -EFAULT;
1da177e4 5335 }
8e09f215 5336 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 5337 return rc;
5338}
5339
5340/*
5341 * Get attributes (cache operations)
5342 * Returnes the cache attributes used in Define Extend (DE).
5343 */
5344static int
1107ccfb 5345dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp)
1da177e4 5346{
543691a4 5347 struct dasd_eckd_private *private = device->private;
1107ccfb 5348 struct attrib_data_t attrib = private->attrib;
1da177e4
LT		 5349 int rc;
5350
5351 if (!capable(CAP_SYS_ADMIN))
5352 return -EACCES;
1107ccfb 5353 if (!argp)
1da177e4
LT		 5354 return -EINVAL;
5355
1107ccfb
CH		 5356 rc = 0;
5357 if (copy_to_user(argp, (long *) &attrib,
8e09f215 5358 sizeof(struct attrib_data_t)))
1107ccfb 5359 rc = -EFAULT;
1da177e4
LT		 5360
5361 return rc;
5362}
5363
5364/*
5365 * Set attributes (cache operations)
5366 * Stores the attributes for cache operation to be used in Define Extend (DE).
5367 */
5368static int
1107ccfb 5369dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp)
1da177e4 5370{
543691a4 5371 struct dasd_eckd_private *private = device->private;
1da177e4
LT		 5372 struct attrib_data_t attrib;
5373
5374 if (!capable(CAP_SYS_ADMIN))
5375 return -EACCES;
1107ccfb 5376 if (!argp)
1da177e4
LT		 5377 return -EINVAL;
5378
1107ccfb 5379 if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t)))
1da177e4 5380 return -EFAULT;
1da177e4
LT		 5381 private->attrib = attrib;
5382
fc19f381
SH		 5383 dev_info(&device->cdev->dev,
5384 "The DASD cache mode was set to %x (%i cylinder prestage)\n",
5385 private->attrib.operation, private->attrib.nr_cyl);
1da177e4
LT		 5386 return 0;
5387}
5388
ab1d848f
NH		 5389/*
5390 * Issue syscall I/O to EMC Symmetrix array.
5391 * CCWs are PSF and RSSD
5392 */
5393static int dasd_symm_io(struct dasd_device *device, void __user *argp)
5394{
5395 struct dasd_symmio_parms usrparm;
5396 char *psf_data, *rssd_result;
5397 struct dasd_ccw_req *cqr;
5398 struct ccw1 *ccw;
52898025 5399 char psf0, psf1;
ab1d848f
NH		 5400 int rc;
5401
52898025
NH		 5402 if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
5403 return -EACCES;
5404 psf0 = psf1 = 0;
5405
ab1d848f
NH		 5406 /* Copy parms from caller */
5407 rc = -EFAULT;
5408 if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
5409 goto out;
92d62891 5410 if (is_compat_task()) {
f8b06859 5411 /* Make sure pointers are sane even on 31 bit. */
ab1d848f 5412 rc = -EINVAL;
f8b06859
HC		 5413 if ((usrparm.psf_data >> 32) != 0)
5414 goto out;
5415 if ((usrparm.rssd_result >> 32) != 0)
5416 goto out;
5417 usrparm.psf_data &= 0x7fffffffULL;
5418 usrparm.rssd_result &= 0x7fffffffULL;
ab1d848f 5419 }
4a8ef699
SH		 5420 /* at least 2 bytes are accessed and should be allocated */
5421 if (usrparm.psf_data_len < 2) {
5422 DBF_DEV_EVENT(DBF_WARNING, device,
5423 "Symmetrix ioctl invalid data length %d",
5424 usrparm.psf_data_len);
5425 rc = -EINVAL;
5426 goto out;
5427 }
ab1d848f
NH		 5428 /* alloc I/O data area */
5429 psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA);
5430 rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA);
5431 if (!psf_data || !rssd_result) {
5432 rc = -ENOMEM;
5433 goto out_free;
5434 }
5435
5436 /* get syscall header from user space */
5437 rc = -EFAULT;
5438 if (copy_from_user(psf_data,
5439 (void __user *)(unsigned long) usrparm.psf_data,
5440 usrparm.psf_data_len))
5441 goto out_free;
52898025
NH		 5442 psf0 = psf_data[0];
5443 psf1 = psf_data[1];
ab1d848f
NH		 5444
5445 /* setup CCWs for PSF + RSSD */
c5205f2f 5446 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2, 0, device, NULL);
ab1d848f 5447 if (IS_ERR(cqr)) {
fc19f381 5448 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
ab1d848f
NH		 5449 "Could not allocate initialization request");
5450 rc = PTR_ERR(cqr);
5451 goto out_free;
5452 }
5453
5454 cqr->startdev = device;
5455 cqr->memdev = device;
5456 cqr->retries = 3;
5457 cqr->expires = 10 * HZ;
1aae0560 5458 cqr->buildclk = get_tod_clock();
ab1d848f
NH		 5459 cqr->status = DASD_CQR_FILLED;
5460
5461 /* Build the ccws */
5462 ccw = cqr->cpaddr;
5463
5464 /* PSF ccw */
5465 ccw->cmd_code = DASD_ECKD_CCW_PSF;
5466 ccw->count = usrparm.psf_data_len;
5467 ccw->flags |= CCW_FLAG_CC;
b87c52e4 5468 ccw->cda = (__u32)virt_to_phys(psf_data);
ab1d848f
NH		 5469
5470 ccw++;
5471
5472 /* RSSD ccw */
5473 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
5474 ccw->count = usrparm.rssd_result_len;
5475 ccw->flags = CCW_FLAG_SLI ;
b87c52e4 5476 ccw->cda = (__u32)virt_to_phys(rssd_result);
ab1d848f
NH		 5477
5478 rc = dasd_sleep_on(cqr);
5479 if (rc)
5480 goto out_sfree;
5481
5482 rc = -EFAULT;
5483 if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result,
5484 rssd_result, usrparm.rssd_result_len))
5485 goto out_sfree;
5486 rc = 0;
5487
5488out_sfree:
5489 dasd_sfree_request(cqr, cqr->memdev);
5490out_free:
5491 kfree(rssd_result);
5492 kfree(psf_data);
5493out:
52898025
NH		 5494 DBF_DEV_EVENT(DBF_WARNING, device,
5495 "Symmetrix ioctl (0x%02x 0x%02x): rc=%d",
5496 (int) psf0, (int) psf1, rc);
ab1d848f
NH		 5497 return rc;
5498}
5499
1107ccfb 5500static int
8e09f215 5501dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp)
1107ccfb 5502{
8e09f215
SW		 5503 struct dasd_device *device = block->base;
5504
1107ccfb
CH		 5505 switch (cmd) {
5506 case BIODASDGATTR:
5507 return dasd_eckd_get_attrib(device, argp);
5508 case BIODASDSATTR:
5509 return dasd_eckd_set_attrib(device, argp);
5510 case BIODASDPSRD:
5511 return dasd_eckd_performance(device, argp);
5512 case BIODASDRLSE:
5513 return dasd_eckd_release(device);
5514 case BIODASDRSRV:
5515 return dasd_eckd_reserve(device);
5516 case BIODASDSLCK:
5517 return dasd_eckd_steal_lock(device);
196339f1
SW		 5518 case BIODASDSNID:
5519 return dasd_eckd_snid(device, argp);
ab1d848f
NH		 5520 case BIODASDSYMMIO:
5521 return dasd_symm_io(device, argp);
1107ccfb 5522 default:
6b79d14e 5523 return -ENOTTY;
1107ccfb
CH		 5524 }
5525}
5526
445b5b49
HH		 5527/*
5528 * Dump the range of CCWs into 'page' buffer
5529 * and return number of printed chars.
5530 */
b49e648f 5531static void
445b5b49
HH		 5532dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page)
5533{
5534 int len, count;
5535 char *datap;
5536
5537 len = 0;
5538 while (from <= to) {
773bab4a 5539 len += sprintf(page + len, PRINTK_HEADER
445b5b49
HH		 5540 " CCW %p: %08X %08X DAT:",
5541 from, ((int *) from)[0], ((int *) from)[1]);
5542
5543 /* get pointer to data (consider IDALs) */
5544 if (from->flags & CCW_FLAG_IDA)
b87c52e4 5545 datap = (char *)*((addr_t *)phys_to_virt(from->cda));
445b5b49 5546 else
b87c52e4 5547 datap = phys_to_virt(from->cda);
445b5b49 5548
b49e648f
SH		 5549 /* dump data (max 128 bytes) */
5550 for (count = 0; count < from->count && count < 128; count++) {
5551 if (count % 32 == 0)
5552 len += sprintf(page + len, "\n");
5553 if (count % 8 == 0)
5554 len += sprintf(page + len, " ");
5555 if (count % 4 == 0)
5556 len += sprintf(page + len, " ");
445b5b49
HH		 5557 len += sprintf(page + len, "%02x", datap[count]);
5558 }
5559 len += sprintf(page + len, "\n");
5560 from++;
5561 }
b49e648f
SH		 5562 if (len > 0)
5563 printk(KERN_ERR "%s", page);
445b5b49
HH		 5564}
5565
fc19f381 5566static void
aeec92ca
SH		 5567dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb,
5568 char *reason)
fc19f381
SH		 5569{
5570 u64 *sense;
a5a0061f 5571 u64 *stat;
aeec92ca
SH		 5572
5573 sense = (u64 *) dasd_get_sense(irb);
a5a0061f 5574 stat = (u64 *) &irb->scsw;
fc19f381 5575 if (sense) {
a5a0061f
SW		 5576 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : "
5577 "%016llx %016llx %016llx %016llx",
5578 reason, *stat, *((u32 *) (stat + 1)),
ed3640b2 5579 sense[0], sense[1], sense[2], sense[3]);
fc19f381 5580 } else {
a5a0061f
SW		 5581 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s",
5582 reason, *stat, *((u32 *) (stat + 1)),
5583 "NO VALID SENSE");
fc19f381
SH		 5584 }
5585}
5586
1da177e4
LT		 5587/*
5588 * Print sense data and related channel program.
5589 * Parts are printed because printk buffer is only 1024 bytes.
5590 */
f3eb5384 5591static void dasd_eckd_dump_sense_ccw(struct dasd_device *device,
8e09f215 5592 struct dasd_ccw_req *req, struct irb *irb)
1da177e4
LT		 5593{
5594 char *page;
445b5b49
HH		 5595 struct ccw1 *first, *last, *fail, *from, *to;
5596 int len, sl, sct;
1da177e4
LT		 5597
5598 page = (char *) get_zeroed_page(GFP_ATOMIC);
5599 if (page == NULL) {
fc19f381
SH		 5600 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
5601 "No memory to dump sense data\n");
1da177e4
LT		 5602 return;
5603 }
445b5b49 5604 /* dump the sense data */
773bab4a 5605 len = sprintf(page, PRINTK_HEADER
1da177e4 5606 " I/O status report for device %s:\n",
2a0217d5 5607 dev_name(&device->cdev->dev));
773bab4a 5608 len += sprintf(page + len, PRINTK_HEADER
a5a0061f
SW		 5609 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X "
5610 "CS:%02X RC:%d\n",
5611 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw),
5612 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw),
5613 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw),
5614 req ? req->intrc : 0);
773bab4a 5615 len += sprintf(page + len, PRINTK_HEADER
1da177e4 5616 " device %s: Failing CCW: %p\n",
2a0217d5 5617 dev_name(&device->cdev->dev),
b87c52e4 5618 phys_to_virt(irb->scsw.cmd.cpa));
1da177e4
LT		 5619 if (irb->esw.esw0.erw.cons) {
5620 for (sl = 0; sl < 4; sl++) {
773bab4a 5621 len += sprintf(page + len, PRINTK_HEADER
1da177e4
LT		 5622 " Sense(hex) %2d-%2d:",
5623 (8 * sl), ((8 * sl) + 7));
5624
5625 for (sct = 0; sct < 8; sct++) {
5626 len += sprintf(page + len, " %02x",
5627 irb->ecw[8 * sl + sct]);
5628 }
5629 len += sprintf(page + len, "\n");
5630 }
5631
5632 if (irb->ecw[27] & DASD_SENSE_BIT_0) {
5633 /* 24 Byte Sense Data */
773bab4a 5634 sprintf(page + len, PRINTK_HEADER
445b5b49
HH		 5635 " 24 Byte: %x MSG %x, "
5636 "%s MSGb to SYSOP\n",
5637 irb->ecw[7] >> 4, irb->ecw[7] & 0x0f,
5638 irb->ecw[1] & 0x10 ? "" : "no");
1da177e4
LT		 5639 } else {
5640 /* 32 Byte Sense Data */
773bab4a 5641 sprintf(page + len, PRINTK_HEADER
445b5b49
HH		 5642 " 32 Byte: Format: %x "
5643 "Exception class %x\n",
5644 irb->ecw[6] & 0x0f, irb->ecw[22] >> 4);
1da177e4
LT		 5645 }
5646 } else {
773bab4a 5647 sprintf(page + len, PRINTK_HEADER
445b5b49 5648 " SORRY - NO VALID SENSE AVAILABLE\n");
1da177e4 5649 }
773bab4a 5650 printk(KERN_ERR "%s", page);
445b5b49 5651
8e09f215
SW		 5652 if (req) {
5653 /* req == NULL for unsolicited interrupts */
5654 /* dump the Channel Program (max 140 Bytes per line) */
b49e648f 5655 /* Count CCW and print first CCWs (maximum 7) */
8e09f215
SW		 5656 first = req->cpaddr;
5657 for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++);
5658 to = min(first + 6, last);
b49e648f
SH		 5659 printk(KERN_ERR PRINTK_HEADER " Related CP in req: %p\n", req);
5660 dasd_eckd_dump_ccw_range(first, to, page);
1da177e4 5661
8e09f215
SW		 5662 /* print failing CCW area (maximum 4) */
5663 /* scsw->cda is either valid or zero */
8e09f215 5664 from = ++to;
b87c52e4 5665 fail = phys_to_virt(irb->scsw.cmd.cpa); /* failing CCW */
8e09f215
SW		 5666 if (from < fail - 2) {
5667 from = fail - 2; /* there is a gap - print header */
b49e648f 5668 printk(KERN_ERR PRINTK_HEADER "......\n");
8e09f215
SW		 5669 }
5670 to = min(fail + 1, last);
b49e648f 5671 dasd_eckd_dump_ccw_range(from, to, page + len);
8e09f215
SW		 5672
5673 /* print last CCWs (maximum 2) */
b49e648f 5674 len = 0;
8e09f215
SW		 5675 from = max(from, ++to);
5676 if (from < last - 1) {
5677 from = last - 1; /* there is a gap - print header */
b49e648f 5678 printk(KERN_ERR PRINTK_HEADER "......\n");
8e09f215 5679 }
b49e648f 5680 dasd_eckd_dump_ccw_range(from, last, page + len);
1da177e4 5681 }
1da177e4
LT		 5682 free_page((unsigned long) page);
5683}
5684
f3eb5384
SW		 5685
5686/*
5687 * Print sense data from a tcw.
5688 */
5689static void dasd_eckd_dump_sense_tcw(struct dasd_device *device,
5690 struct dasd_ccw_req *req, struct irb *irb)
5691{
5692 char *page;
5693 int len, sl, sct, residual;
f3eb5384 5694 struct tsb *tsb;
ef19298b 5695 u8 *sense, *rcq;
f3eb5384
SW		 5696
5697 page = (char *) get_zeroed_page(GFP_ATOMIC);
5698 if (page == NULL) {
fc19f381 5699 DBF_DEV_EVENT(DBF_WARNING, device, " %s",
f3eb5384
SW		 5700 "No memory to dump sense data");
5701 return;
5702 }
5703 /* dump the sense data */
773bab4a 5704 len = sprintf(page, PRINTK_HEADER
f3eb5384
SW		 5705 " I/O status report for device %s:\n",
5706 dev_name(&device->cdev->dev));
773bab4a 5707 len += sprintf(page + len, PRINTK_HEADER
a5a0061f
SW		 5708 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X "
5709 "CS:%02X fcxs:%02X schxs:%02X RC:%d\n",
5710 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw),
5711 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw),
5712 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw),
a521b048
SH		 5713 irb->scsw.tm.fcxs,
5714 (irb->scsw.tm.ifob << 7) | irb->scsw.tm.sesq,
a5a0061f 5715 req ? req->intrc : 0);
773bab4a 5716 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 5717 " device %s: Failing TCW: %p\n",
5718 dev_name(&device->cdev->dev),
b87c52e4 5719 phys_to_virt(irb->scsw.tm.tcw));
f3eb5384
SW		 5720
5721 tsb = NULL;
5722 sense = NULL;
a5a0061f 5723 if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01))
b87c52e4 5724 tsb = tcw_get_tsb(phys_to_virt(irb->scsw.tm.tcw));
f3eb5384 5725
b8fde722 5726 if (tsb) {
773bab4a 5727 len += sprintf(page + len, PRINTK_HEADER
f3eb5384 5728 " tsb->length %d\n", tsb->length);
773bab4a 5729 len += sprintf(page + len, PRINTK_HEADER
f3eb5384 5730 " tsb->flags %x\n", tsb->flags);
773bab4a 5731 len += sprintf(page + len, PRINTK_HEADER
f3eb5384 5732 " tsb->dcw_offset %d\n", tsb->dcw_offset);
773bab4a 5733 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 5734 " tsb->count %d\n", tsb->count);
5735 residual = tsb->count - 28;
773bab4a 5736 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 5737 " residual %d\n", residual);
5738
5739 switch (tsb->flags & 0x07) {
5740 case 1: /* tsa_iostat */
773bab4a 5741 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 5742 " tsb->tsa.iostat.dev_time %d\n",
5743 tsb->tsa.iostat.dev_time);
773bab4a 5744 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 5745 " tsb->tsa.iostat.def_time %d\n",
5746 tsb->tsa.iostat.def_time);
773bab4a 5747 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 5748 " tsb->tsa.iostat.queue_time %d\n",
5749 tsb->tsa.iostat.queue_time);
773bab4a 5750 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 5751 " tsb->tsa.iostat.dev_busy_time %d\n",
5752 tsb->tsa.iostat.dev_busy_time);
773bab4a 5753 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 5754 " tsb->tsa.iostat.dev_act_time %d\n",
5755 tsb->tsa.iostat.dev_act_time);
5756 sense = tsb->tsa.iostat.sense;
5757 break;
5758 case 2: /* ts_ddpc */
773bab4a 5759 len += sprintf(page + len, PRINTK_HEADER
f3eb5384 5760 " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc);
ef19298b 5761 for (sl = 0; sl < 2; sl++) {
773bab4a 5762 len += sprintf(page + len, PRINTK_HEADER
ef19298b
SW		 5763 " tsb->tsa.ddpc.rcq %2d-%2d: ",
5764 (8 * sl), ((8 * sl) + 7));
5765 rcq = tsb->tsa.ddpc.rcq;
f3eb5384
SW		 5766 for (sct = 0; sct < 8; sct++) {
5767 len += sprintf(page + len, " %02x",
ef19298b 5768 rcq[8 * sl + sct]);
f3eb5384
SW		 5769 }
5770 len += sprintf(page + len, "\n");
5771 }
5772 sense = tsb->tsa.ddpc.sense;
5773 break;
5774 case 3: /* tsa_intrg */
773bab4a 5775 len += sprintf(page + len, PRINTK_HEADER
8693b914 5776 " tsb->tsa.intrg.: not supported yet\n");
f3eb5384
SW		 5777 break;
5778 }
5779
5780 if (sense) {
5781 for (sl = 0; sl < 4; sl++) {
773bab4a 5782 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 5783 " Sense(hex) %2d-%2d:",
5784 (8 * sl), ((8 * sl) + 7));
5785 for (sct = 0; sct < 8; sct++) {
5786 len += sprintf(page + len, " %02x",
5787 sense[8 * sl + sct]);
5788 }
5789 len += sprintf(page + len, "\n");
5790 }
5791
5792 if (sense[27] & DASD_SENSE_BIT_0) {
5793 /* 24 Byte Sense Data */
773bab4a 5794 sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 5795 " 24 Byte: %x MSG %x, "
5796 "%s MSGb to SYSOP\n",
5797 sense[7] >> 4, sense[7] & 0x0f,
5798 sense[1] & 0x10 ? "" : "no");
5799 } else {
5800 /* 32 Byte Sense Data */
773bab4a 5801 sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 5802 " 32 Byte: Format: %x "
5803 "Exception class %x\n",
5804 sense[6] & 0x0f, sense[22] >> 4);
5805 }
5806 } else {
773bab4a 5807 sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 5808 " SORRY - NO VALID SENSE AVAILABLE\n");
5809 }
5810 } else {
773bab4a 5811 sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 5812 " SORRY - NO TSB DATA AVAILABLE\n");
5813 }
773bab4a 5814 printk(KERN_ERR "%s", page);
f3eb5384
SW		 5815 free_page((unsigned long) page);
5816}
5817
5818static void dasd_eckd_dump_sense(struct dasd_device *device,
5819 struct dasd_ccw_req *req, struct irb *irb)
5820{
8fd57520
JH		 5821 u8 *sense = dasd_get_sense(irb);
5822
5823 if (scsw_is_tm(&irb->scsw)) {
5824 /*
5825 * In some cases the 'File Protected' or 'Incorrect Length'
5826 * error might be expected and log messages shouldn't be written
5827 * then. Check if the according suppress bit is set.
5828 */
5829 if (sense && (sense[1] & SNS1_FILE_PROTECTED) &&
5830 test_bit(DASD_CQR_SUPPRESS_FP, &req->flags))
5831 return;
5832 if (scsw_cstat(&irb->scsw) == 0x40 &&
5833 test_bit(DASD_CQR_SUPPRESS_IL, &req->flags))
5834 return;
5835
f3eb5384 5836 dasd_eckd_dump_sense_tcw(device, req, irb);
8fd57520
JH		 5837 } else {
5838 /*
ab24fbd3
SH		 5839 * In some cases the 'Command Reject' or 'No Record Found'
5840 * error might be expected and log messages shouldn't be
5841 * written then. Check if the according suppress bit is set.
8fd57520 5842 */
ab24fbd3
SH		 5843 if (sense && sense[0] & SNS0_CMD_REJECT &&
5844 test_bit(DASD_CQR_SUPPRESS_CR, &req->flags))
5845 return;
5846
8fd57520
JH		 5847 if (sense && sense[1] & SNS1_NO_REC_FOUND &&
5848 test_bit(DASD_CQR_SUPPRESS_NRF, &req->flags))
5849 return;
5850
f3eb5384 5851 dasd_eckd_dump_sense_ccw(device, req, irb);
8fd57520 5852 }
f3eb5384
SW		 5853}
5854
501183f2
SH		 5855static int dasd_eckd_reload_device(struct dasd_device *device)
5856{
543691a4 5857 struct dasd_eckd_private *private = device->private;
501183f2 5858 int rc, old_base;
2dedf0d9
SH		 5859 char print_uid[60];
5860 struct dasd_uid uid;
5861 unsigned long flags;
501183f2 5862
59a9ed5f
SH		 5863 /*
5864 * remove device from alias handling to prevent new requests
5865 * from being scheduled on the wrong alias device
5866 */
5867 dasd_alias_remove_device(device);
5868
2dedf0d9 5869 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
501183f2 5870 old_base = private->uid.base_unit_addr;
2dedf0d9
SH		 5871 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
5872
501183f2
SH		 5873 /* Read Configuration Data */
5874 rc = dasd_eckd_read_conf(device);
5875 if (rc)
5876 goto out_err;
5877
74e2f211
SH		 5878 dasd_eckd_read_fc_security(device);
5879
2dedf0d9 5880 rc = dasd_eckd_generate_uid(device);
501183f2
SH		 5881 if (rc)
5882 goto out_err;
501183f2
SH		 5883 /*
5884 * update unit address configuration and
5885 * add device to alias management
5886 */
5887 dasd_alias_update_add_device(device);
5888
2dedf0d9
SH		 5889 dasd_eckd_get_uid(device, &uid);
5890
5891 if (old_base != uid.base_unit_addr) {
542e30ce 5892 dasd_eckd_get_uid_string(&private->conf, print_uid);
501183f2
SH		 5893 dev_info(&device->cdev->dev,
5894 "An Alias device was reassigned to a new base device "
2dedf0d9 5895 "with UID: %s\n", print_uid);
501183f2
SH		 5896 }
5897 return 0;
5898
5899out_err:
5900 return -1;
5901}
5902
5db8440c
SH		 5903static int dasd_eckd_read_message_buffer(struct dasd_device *device,
5904 struct dasd_rssd_messages *messages,
5905 __u8 lpum)
5906{
5907 struct dasd_rssd_messages *message_buf;
5908 struct dasd_psf_prssd_data *prssdp;
5db8440c
SH		 5909 struct dasd_ccw_req *cqr;
5910 struct ccw1 *ccw;
5911 int rc;
5912
5db8440c
SH		 5913 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
5914 (sizeof(struct dasd_psf_prssd_data) +
5915 sizeof(struct dasd_rssd_messages)),
c5205f2f 5916 device, NULL);
5db8440c
SH		 5917 if (IS_ERR(cqr)) {
5918 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
5919 "Could not allocate read message buffer request");
5920 return PTR_ERR(cqr);
5921 }
5922
af775210
SH		 5923 cqr->lpm = lpum;
5924retry:
5db8440c
SH		 5925 cqr->startdev = device;
5926 cqr->memdev = device;
5927 cqr->block = NULL;
5db8440c 5928 cqr->expires = 10 * HZ;
5db8440c 5929 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags);
b179b037
SH		 5930 /* dasd_sleep_on_immediatly does not do complex error
5931 * recovery so clear erp flag and set retry counter to
5932 * do basic erp */
5933 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
5934 cqr->retries = 256;
5db8440c
SH		 5935
5936 /* Prepare for Read Subsystem Data */
5937 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
5938 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
5939 prssdp->order = PSF_ORDER_PRSSD;
5940 prssdp->suborder = 0x03; /* Message Buffer */
5941 /* all other bytes of prssdp must be zero */
5942
5943 ccw = cqr->cpaddr;
5944 ccw->cmd_code = DASD_ECKD_CCW_PSF;
5945 ccw->count = sizeof(struct dasd_psf_prssd_data);
5946 ccw->flags |= CCW_FLAG_CC;
5947 ccw->flags |= CCW_FLAG_SLI;
b87c52e4 5948 ccw->cda = (__u32)virt_to_phys(prssdp);
5db8440c
SH		 5949
5950 /* Read Subsystem Data - message buffer */
5951 message_buf = (struct dasd_rssd_messages *) (prssdp + 1);
5952 memset(message_buf, 0, sizeof(struct dasd_rssd_messages));
5953
5954 ccw++;
5955 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
5956 ccw->count = sizeof(struct dasd_rssd_messages);
5957 ccw->flags |= CCW_FLAG_SLI;
b87c52e4 5958 ccw->cda = (__u32)virt_to_phys(message_buf);
5db8440c
SH		 5959
5960 cqr->buildclk = get_tod_clock();
5961 cqr->status = DASD_CQR_FILLED;
5962 rc = dasd_sleep_on_immediatly(cqr);
5963 if (rc == 0) {
5964 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
5965 message_buf = (struct dasd_rssd_messages *)
5966 (prssdp + 1);
5967 memcpy(messages, message_buf,
5968 sizeof(struct dasd_rssd_messages));
af775210
SH		 5969 } else if (cqr->lpm) {
5970 /*
5971 * on z/VM we might not be able to do I/O on the requested path
5972 * but instead we get the required information on any path
5973 * so retry with open path mask
5974 */
5975 cqr->lpm = 0;
5976 goto retry;
5db8440c
SH		 5977 } else
5978 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
5979 "Reading messages failed with rc=%d\n"
5980 , rc);
5981 dasd_sfree_request(cqr, cqr->memdev);
5982 return rc;
5983}
5984
5a3b7b11
SH		 5985static int dasd_eckd_query_host_access(struct dasd_device *device,
5986 struct dasd_psf_query_host_access *data)
5987{
5988 struct dasd_eckd_private *private = device->private;
5989 struct dasd_psf_query_host_access *host_access;
5990 struct dasd_psf_prssd_data *prssdp;
5991 struct dasd_ccw_req *cqr;
5992 struct ccw1 *ccw;
5993 int rc;
5994
5995 /* not available for HYPER PAV alias devices */
5996 if (!device->block && private->lcu->pav == HYPER_PAV)
5997 return -EOPNOTSUPP;
5998
ccd53fa2
SH		 5999 /* may not be supported by the storage server */
6000 if (!(private->features.feature[14] & 0x80))
6001 return -EOPNOTSUPP;
6002
5a3b7b11
SH		 6003 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
6004 sizeof(struct dasd_psf_prssd_data) + 1,
c5205f2f 6005 device, NULL);
5a3b7b11
SH		 6006 if (IS_ERR(cqr)) {
6007 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
6008 "Could not allocate read message buffer request");
6009 return PTR_ERR(cqr);
6010 }
6011 host_access = kzalloc(sizeof(*host_access), GFP_KERNEL | GFP_DMA);
6012 if (!host_access) {
6013 dasd_sfree_request(cqr, device);
6014 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
6015 "Could not allocate host_access buffer");
6016 return -ENOMEM;
6017 }
6018 cqr->startdev = device;
6019 cqr->memdev = device;
6020 cqr->block = NULL;
6021 cqr->retries = 256;
6022 cqr->expires = 10 * HZ;
6023
6024 /* Prepare for Read Subsystem Data */
6025 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
6026 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
6027 prssdp->order = PSF_ORDER_PRSSD;
6028 prssdp->suborder = PSF_SUBORDER_QHA; /* query host access */
6029 /* LSS and Volume that will be queried */
542e30ce
SH		 6030 prssdp->lss = private->conf.ned->ID;
6031 prssdp->volume = private->conf.ned->unit_addr;
5a3b7b11
SH		 6032 /* all other bytes of prssdp must be zero */
6033
6034 ccw = cqr->cpaddr;
6035 ccw->cmd_code = DASD_ECKD_CCW_PSF;
6036 ccw->count = sizeof(struct dasd_psf_prssd_data);
6037 ccw->flags |= CCW_FLAG_CC;
6038 ccw->flags |= CCW_FLAG_SLI;
b87c52e4 6039 ccw->cda = (__u32)virt_to_phys(prssdp);
5a3b7b11
SH		 6040
6041 /* Read Subsystem Data - query host access */
6042 ccw++;
6043 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
6044 ccw->count = sizeof(struct dasd_psf_query_host_access);
6045 ccw->flags |= CCW_FLAG_SLI;
b87c52e4 6046 ccw->cda = (__u32)virt_to_phys(host_access);
5a3b7b11
SH		 6047
6048 cqr->buildclk = get_tod_clock();
6049 cqr->status = DASD_CQR_FILLED;
ab24fbd3
SH		 6050 /* the command might not be supported, suppress error message */
6051 __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags);
f50af850 6052 rc = dasd_sleep_on_interruptible(cqr);
5a3b7b11
SH		 6053 if (rc == 0) {
6054 *data = *host_access;
6055 } else {
6056 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
6057 "Reading host access data failed with rc=%d\n",
6058 rc);
6059 rc = -EOPNOTSUPP;
6060 }
6061
6062 dasd_sfree_request(cqr, cqr->memdev);
6063 kfree(host_access);
6064 return rc;
6065}
6066/*
6067 * return number of grouped devices
6068 */
6069static int dasd_eckd_host_access_count(struct dasd_device *device)
6070{
6071 struct dasd_psf_query_host_access *access;
6072 struct dasd_ckd_path_group_entry *entry;
6073 struct dasd_ckd_host_information *info;
6074 int count = 0;
6075 int rc, i;
6076
6077 access = kzalloc(sizeof(*access), GFP_NOIO);
6078 if (!access) {
6079 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
6080 "Could not allocate access buffer");
6081 return -ENOMEM;
6082 }
6083 rc = dasd_eckd_query_host_access(device, access);
6084 if (rc) {
6085 kfree(access);
6086 return rc;
6087 }
6088
6089 info = (struct dasd_ckd_host_information *)
6090 access->host_access_information;
6091 for (i = 0; i < info->entry_count; i++) {
6092 entry = (struct dasd_ckd_path_group_entry *)
6093 (info->entry + i * info->entry_size);
6094 if (entry->status_flags & DASD_ECKD_PG_GROUPED)
6095 count++;
6096 }
6097
6098 kfree(access);
6099 return count;
6100}
6101
6102/*
6103 * write host access information to a sequential file
6104 */
6105static int dasd_hosts_print(struct dasd_device *device, struct seq_file *m)
6106{
6107 struct dasd_psf_query_host_access *access;
6108 struct dasd_ckd_path_group_entry *entry;
6109 struct dasd_ckd_host_information *info;
6110 char sysplex[9] = "";
c7848e14 6111 int rc, i;
5a3b7b11
SH		 6112
6113 access = kzalloc(sizeof(*access), GFP_NOIO);
6114 if (!access) {
6115 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
6116 "Could not allocate access buffer");
6117 return -ENOMEM;
6118 }
6119 rc = dasd_eckd_query_host_access(device, access);
6120 if (rc) {
6121 kfree(access);
6122 return rc;
6123 }
6124
6125 info = (struct dasd_ckd_host_information *)
6126 access->host_access_information;
6127 for (i = 0; i < info->entry_count; i++) {
6128 entry = (struct dasd_ckd_path_group_entry *)
6129 (info->entry + i * info->entry_size);
6130 /* PGID */
c7848e14 6131 seq_printf(m, "pgid %*phN\n", 11, entry->pgid);
5a3b7b11
SH		 6132 /* FLAGS */
6133 seq_printf(m, "status_flags %02x\n", entry->status_flags);
6134 /* SYSPLEX NAME */
6135 memcpy(&sysplex, &entry->sysplex_name, sizeof(sysplex) - 1);
6136 EBCASC(sysplex, sizeof(sysplex));
6137 seq_printf(m, "sysplex_name %8s\n", sysplex);
6138 /* SUPPORTED CYLINDER */
6139 seq_printf(m, "supported_cylinder %d\n", entry->cylinder);
6140 /* TIMESTAMP */
6141 seq_printf(m, "timestamp %lu\n", (unsigned long)
6142 entry->timestamp);
6143 }
6144 kfree(access);
6145
6146 return 0;
6147}
6148
413862ca
SH		 6149static struct dasd_device
6150*copy_relation_find_device(struct dasd_copy_relation *copy,
6151 char *busid)
6152{
6153 int i;
6154
6155 for (i = 0; i < DASD_CP_ENTRIES; i++) {
6156 if (copy->entry[i].configured &&
6157 strncmp(copy->entry[i].busid, busid, DASD_BUS_ID_SIZE) == 0)
6158 return copy->entry[i].device;
6159 }
6160 return NULL;
6161}
6162
6163/*
6164 * set the new active/primary device
6165 */
6166static void copy_pair_set_active(struct dasd_copy_relation *copy, char *new_busid,
6167 char *old_busid)
6168{
6169 int i;
6170
6171 for (i = 0; i < DASD_CP_ENTRIES; i++) {
6172 if (copy->entry[i].configured &&
6173 strncmp(copy->entry[i].busid, new_busid,
6174 DASD_BUS_ID_SIZE) == 0) {
6175 copy->active = &copy->entry[i];
6176 copy->entry[i].primary = true;
6177 } else if (copy->entry[i].configured &&
6178 strncmp(copy->entry[i].busid, old_busid,
6179 DASD_BUS_ID_SIZE) == 0) {
6180 copy->entry[i].primary = false;
6181 }
6182 }
6183}
6184
6185/*
6186 * The function will swap the role of a given copy pair.
6187 * During the swap operation the relation of the blockdevice is disconnected
6188 * from the old primary and connected to the new.
6189 *
6190 * IO is paused on the block queue before swap and may be resumed afterwards.
6191 */
6192static int dasd_eckd_copy_pair_swap(struct dasd_device *device, char *prim_busid,
6193 char *sec_busid)
6194{
6195 struct dasd_device *primary, *secondary;
6196 struct dasd_copy_relation *copy;
6197 struct dasd_block *block;
6198 struct gendisk *gdp;
6199
6200 copy = device->copy;
6201 if (!copy)
6202 return DASD_COPYPAIRSWAP_INVALID;
6203 primary = copy->active->device;
6204 if (!primary)
6205 return DASD_COPYPAIRSWAP_INVALID;
6206 /* double check if swap has correct primary */
6207 if (strncmp(dev_name(&primary->cdev->dev), prim_busid, DASD_BUS_ID_SIZE) != 0)
6208 return DASD_COPYPAIRSWAP_PRIMARY;
6209
6210 secondary = copy_relation_find_device(copy, sec_busid);
6211 if (!secondary)
6212 return DASD_COPYPAIRSWAP_SECONDARY;
6213
6214 /*
6215 * usually the device should be quiesced for swap
6216 * for paranoia stop device and requeue requests again
6217 */
6218 dasd_device_set_stop_bits(primary, DASD_STOPPED_PPRC);
6219 dasd_device_set_stop_bits(secondary, DASD_STOPPED_PPRC);
6220 dasd_generic_requeue_all_requests(primary);
6221
6222 /* swap DASD internal device <> block assignment */
6223 block = primary->block;
6224 primary->block = NULL;
6225 secondary->block = block;
6226 block->base = secondary;
6227 /* set new primary device in COPY relation */
6228 copy_pair_set_active(copy, sec_busid, prim_busid);
6229
6230 /* swap blocklayer device link */
6231 gdp = block->gdp;
6232 dasd_add_link_to_gendisk(gdp, secondary);
6233
6234 /* re-enable device */
6235 dasd_device_remove_stop_bits(primary, DASD_STOPPED_PPRC);
6236 dasd_device_remove_stop_bits(secondary, DASD_STOPPED_PPRC);
6237 dasd_schedule_device_bh(secondary);
6238
6239 return DASD_COPYPAIRSWAP_SUCCESS;
6240}
6241
3f217cce
SH		 6242/*
6243 * Perform Subsystem Function - Peer-to-Peer Remote Copy Extended Query
6244 */
6245static int dasd_eckd_query_pprc_status(struct dasd_device *device,
6246 struct dasd_pprc_data_sc4 *data)
6247{
6248 struct dasd_pprc_data_sc4 *pprc_data;
6249 struct dasd_psf_prssd_data *prssdp;
6250 struct dasd_ccw_req *cqr;
6251 struct ccw1 *ccw;
6252 int rc;
6253
6254 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
6255 sizeof(*prssdp) + sizeof(*pprc_data) + 1,
6256 device, NULL);
6257 if (IS_ERR(cqr)) {
6258 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
6259 "Could not allocate query PPRC status request");
6260 return PTR_ERR(cqr);
6261 }
6262 cqr->startdev = device;
6263 cqr->memdev = device;
6264 cqr->block = NULL;
6265 cqr->retries = 256;
6266 cqr->expires = 10 * HZ;
6267
6268 /* Prepare for Read Subsystem Data */
6269 prssdp = (struct dasd_psf_prssd_data *)cqr->data;
6270 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
6271 prssdp->order = PSF_ORDER_PRSSD;
6272 prssdp->suborder = PSF_SUBORDER_PPRCEQ;
6273 prssdp->varies[0] = PPRCEQ_SCOPE_4;
6274 pprc_data = (struct dasd_pprc_data_sc4 *)(prssdp + 1);
6275
6276 ccw = cqr->cpaddr;
6277 ccw->cmd_code = DASD_ECKD_CCW_PSF;
6278 ccw->count = sizeof(struct dasd_psf_prssd_data);
6279 ccw->flags |= CCW_FLAG_CC;
6280 ccw->flags |= CCW_FLAG_SLI;
6281 ccw->cda = (__u32)(addr_t)prssdp;
6282
6283 /* Read Subsystem Data - query host access */
6284 ccw++;
6285 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
6286 ccw->count = sizeof(*pprc_data);
6287 ccw->flags |= CCW_FLAG_SLI;
6288 ccw->cda = (__u32)(addr_t)pprc_data;
6289
6290 cqr->buildclk = get_tod_clock();
6291 cqr->status = DASD_CQR_FILLED;
6292
6293 rc = dasd_sleep_on_interruptible(cqr);
6294 if (rc == 0) {
6295 *data = *pprc_data;
6296 } else {
6297 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
6298 "PPRC Extended Query failed with rc=%d\n",
6299 rc);
6300 rc = -EOPNOTSUPP;
6301 }
6302
6303 dasd_sfree_request(cqr, cqr->memdev);
6304 return rc;
6305}
6306
32ff8ce0
SH		 6307/*
6308 * ECKD NOP - no operation
6309 */
6310static int dasd_eckd_nop(struct dasd_device *device)
6311{
6312 struct dasd_ccw_req *cqr;
6313 struct ccw1 *ccw;
6314 int rc;
6315
6316 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 1, device, NULL);
6317 if (IS_ERR(cqr)) {
6318 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
6319 "Could not allocate NOP request");
6320 return PTR_ERR(cqr);
6321 }
6322 cqr->startdev = device;
6323 cqr->memdev = device;
6324 cqr->block = NULL;
6325 cqr->retries = 1;
6326 cqr->expires = 10 * HZ;
6327
6328 ccw = cqr->cpaddr;
6329 ccw->cmd_code = DASD_ECKD_CCW_NOP;
6330 ccw->flags |= CCW_FLAG_SLI;
6331
6332 cqr->buildclk = get_tod_clock();
6333 cqr->status = DASD_CQR_FILLED;
6334
6335 rc = dasd_sleep_on_interruptible(cqr);
6336 if (rc != 0) {
6337 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
6338 "NOP failed with rc=%d\n", rc);
6339 rc = -EOPNOTSUPP;
6340 }
6341 dasd_sfree_request(cqr, cqr->memdev);
6342 return rc;
6343}
6344
6345static int dasd_eckd_device_ping(struct dasd_device *device)
6346{
6347 return dasd_eckd_nop(device);
6348}
6349
5db8440c
SH		 6350/*
6351 * Perform Subsystem Function - CUIR response
6352 */
6353static int
6354dasd_eckd_psf_cuir_response(struct dasd_device *device, int response,
a521b048 6355 __u32 message_id, __u8 lpum)
5db8440c
SH		 6356{
6357 struct dasd_psf_cuir_response *psf_cuir;
a521b048 6358 int pos = pathmask_to_pos(lpum);
5db8440c
SH		 6359 struct dasd_ccw_req *cqr;
6360 struct ccw1 *ccw;
6361 int rc;
6362
6363 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ ,
c5205f2f
SO		 6364 sizeof(struct dasd_psf_cuir_response),
6365 device, NULL);
5db8440c
SH		 6366
6367 if (IS_ERR(cqr)) {
6368 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
6369 "Could not allocate PSF-CUIR request");
6370 return PTR_ERR(cqr);
6371 }
6372
6373 psf_cuir = (struct dasd_psf_cuir_response *)cqr->data;
6374 psf_cuir->order = PSF_ORDER_CUIR_RESPONSE;
6375 psf_cuir->cc = response;
a521b048 6376 psf_cuir->chpid = device->path[pos].chpid;
5db8440c 6377 psf_cuir->message_id = message_id;
a521b048
SH		 6378 psf_cuir->cssid = device->path[pos].cssid;
6379 psf_cuir->ssid = device->path[pos].ssid;
5db8440c
SH		 6380 ccw = cqr->cpaddr;
6381 ccw->cmd_code = DASD_ECKD_CCW_PSF;
b87c52e4 6382 ccw->cda = (__u32)virt_to_phys(psf_cuir);
b179b037 6383 ccw->flags = CCW_FLAG_SLI;
5db8440c
SH		 6384 ccw->count = sizeof(struct dasd_psf_cuir_response);
6385
6386 cqr->startdev = device;
6387 cqr->memdev = device;
6388 cqr->block = NULL;
6389 cqr->retries = 256;
6390 cqr->expires = 10*HZ;
6391 cqr->buildclk = get_tod_clock();
6392 cqr->status = DASD_CQR_FILLED;
b179b037 6393 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags);
5db8440c
SH		 6394
6395 rc = dasd_sleep_on(cqr);
6396
6397 dasd_sfree_request(cqr, cqr->memdev);
6398 return rc;
6399}
6400
b179b037
SH		 6401/*
6402 * return configuration data that is referenced by record selector
6403 * if a record selector is specified or per default return the
6404 * conf_data pointer for the path specified by lpum
6405 */
6406static struct dasd_conf_data *dasd_eckd_get_ref_conf(struct dasd_device *device,
6407 __u8 lpum,
6408 struct dasd_cuir_message *cuir)
5db8440c 6409{
b179b037
SH		 6410 struct dasd_conf_data *conf_data;
6411 int path, pos;
5db8440c 6412
b179b037
SH		 6413 if (cuir->record_selector == 0)
6414 goto out;
6415 for (path = 0x80, pos = 0; path; path >>= 1, pos++) {
c9346151 6416 conf_data = device->path[pos].conf_data;
b179b037
SH		 6417 if (conf_data->gneq.record_selector ==
6418 cuir->record_selector)
6419 return conf_data;
5db8440c 6420 }
b179b037 6421out:
c9346151 6422 return device->path[pathmask_to_pos(lpum)].conf_data;
5db8440c
SH		 6423}
6424
6425/*
b179b037
SH		 6426 * This function determines the scope of a reconfiguration request by
6427 * analysing the path and device selection data provided in the CUIR request.
6428 * Returns a path mask containing CUIR affected paths for the give device.
6429 *
6430 * If the CUIR request does not contain the required information return the
6431 * path mask of the path the attention message for the CUIR request was reveived
6432 * on.
6433 */
6434static int dasd_eckd_cuir_scope(struct dasd_device *device, __u8 lpum,
6435 struct dasd_cuir_message *cuir)
6436{
6437 struct dasd_conf_data *ref_conf_data;
6438 unsigned long bitmask = 0, mask = 0;
b179b037
SH		 6439 struct dasd_conf_data *conf_data;
6440 unsigned int pos, path;
6441 char *ref_gneq, *gneq;
6442 char *ref_ned, *ned;
6443 int tbcpm = 0;
6444
6445 /* if CUIR request does not specify the scope use the path
6446 the attention message was presented on */
6447 if (!cuir->ned_map ||
6448 !(cuir->neq_map[0] | cuir->neq_map[1] | cuir->neq_map[2]))
6449 return lpum;
6450
b179b037
SH		 6451 /* get reference conf data */
6452 ref_conf_data = dasd_eckd_get_ref_conf(device, lpum, cuir);
6453 /* reference ned is determined by ned_map field */
6454 pos = 8 - ffs(cuir->ned_map);
6455 ref_ned = (char *)&ref_conf_data->neds[pos];
6456 ref_gneq = (char *)&ref_conf_data->gneq;
6457 /* transfer 24 bit neq_map to mask */
6458 mask = cuir->neq_map[2];
6459 mask |= cuir->neq_map[1] << 8;
6460 mask |= cuir->neq_map[0] << 16;
6461
c9346151 6462 for (path = 0; path < 8; path++) {
b179b037
SH		 6463 /* initialise data per path */
6464 bitmask = mask;
c9346151 6465 conf_data = device->path[path].conf_data;
b179b037
SH		 6466 pos = 8 - ffs(cuir->ned_map);
6467 ned = (char *) &conf_data->neds[pos];
6468 /* compare reference ned and per path ned */
6469 if (memcmp(ref_ned, ned, sizeof(*ned)) != 0)
6470 continue;
6471 gneq = (char *)&conf_data->gneq;
6472 /* compare reference gneq and per_path gneq under
6473 24 bit mask where mask bit 0 equals byte 7 of
6474 the gneq and mask bit 24 equals byte 31 */
6475 while (bitmask) {
6476 pos = ffs(bitmask) - 1;
6477 if (memcmp(&ref_gneq[31 - pos], &gneq[31 - pos], 1)
6478 != 0)
6479 break;
6480 clear_bit(pos, &bitmask);
6481 }
6482 if (bitmask)
6483 continue;
6484 /* device and path match the reference values
6485 add path to CUIR scope */
c9346151 6486 tbcpm |= 0x80 >> path;
b179b037
SH		 6487 }
6488 return tbcpm;
6489}
6490
6491static void dasd_eckd_cuir_notify_user(struct dasd_device *device,
a521b048 6492 unsigned long paths, int action)
b179b037 6493{
b179b037
SH		 6494 int pos;
6495
6496 while (paths) {
6497 /* get position of bit in mask */
a521b048 6498 pos = 8 - ffs(paths);
b179b037 6499 /* get channel path descriptor from this position */
b179b037 6500 if (action == CUIR_QUIESCE)
a521b048
SH		 6501 pr_warn("Service on the storage server caused path %x.%02x to go offline",
6502 device->path[pos].cssid,
6503 device->path[pos].chpid);
b179b037 6504 else if (action == CUIR_RESUME)
a521b048
SH		 6505 pr_info("Path %x.%02x is back online after service on the storage server",
6506 device->path[pos].cssid,
6507 device->path[pos].chpid);
6508 clear_bit(7 - pos, &paths);
b179b037
SH		 6509 }
6510}
6511
6512static int dasd_eckd_cuir_remove_path(struct dasd_device *device, __u8 lpum,
6513 struct dasd_cuir_message *cuir)
6514{
6515 unsigned long tbcpm;
6516
6517 tbcpm = dasd_eckd_cuir_scope(device, lpum, cuir);
6518 /* nothing to do if path is not in use */
c9346151 6519 if (!(dasd_path_get_opm(device) & tbcpm))
b179b037 6520 return 0;
c9346151 6521 if (!(dasd_path_get_opm(device) & ~tbcpm)) {
b179b037
SH		 6522 /* no path would be left if the CUIR action is taken
6523 return error */
6524 return -EINVAL;
6525 }
6526 /* remove device from operational path mask */
c9346151
SH		 6527 dasd_path_remove_opm(device, tbcpm);
6528 dasd_path_add_cuirpm(device, tbcpm);
b179b037
SH		 6529 return tbcpm;
6530}
6531
6532/*
6533 * walk through all devices and build a path mask to quiesce them
6534 * return an error if the last path to a device would be removed
5db8440c
SH		 6535 *
6536 * if only part of the devices are quiesced and an error
6537 * occurs no onlining necessary, the storage server will
6538 * notify the already set offline devices again
6539 */
6540static int dasd_eckd_cuir_quiesce(struct dasd_device *device, __u8 lpum,
b179b037 6541 struct dasd_cuir_message *cuir)
5db8440c 6542{
543691a4 6543 struct dasd_eckd_private *private = device->private;
5db8440c 6544 struct alias_pav_group *pavgroup, *tempgroup;
5db8440c 6545 struct dasd_device *dev, *n;
b179b037
SH		 6546 unsigned long paths = 0;
6547 unsigned long flags;
6548 int tbcpm;
5db8440c 6549
5db8440c 6550 /* active devices */
b179b037 6551 list_for_each_entry_safe(dev, n, &private->lcu->active_devices,
5db8440c 6552 alias_list) {
b179b037
SH		 6553 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
6554 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
6555 spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags);
6556 if (tbcpm < 0)
6557 goto out_err;
6558 paths |= tbcpm;
5db8440c 6559 }
5db8440c 6560 /* inactive devices */
b179b037 6561 list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices,
5db8440c 6562 alias_list) {
b179b037
SH		 6563 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
6564 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
6565 spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags);
6566 if (tbcpm < 0)
6567 goto out_err;
6568 paths |= tbcpm;
5db8440c 6569 }
5db8440c
SH		 6570 /* devices in PAV groups */
6571 list_for_each_entry_safe(pavgroup, tempgroup,
6572 &private->lcu->grouplist, group) {
6573 list_for_each_entry_safe(dev, n, &pavgroup->baselist,
6574 alias_list) {
b179b037
SH		 6575 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
6576 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
6577 spin_unlock_irqrestore(
6578 get_ccwdev_lock(dev->cdev), flags);
6579 if (tbcpm < 0)
6580 goto out_err;
6581 paths |= tbcpm;
5db8440c
SH		 6582 }
6583 list_for_each_entry_safe(dev, n, &pavgroup->aliaslist,
6584 alias_list) {
b179b037
SH		 6585 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
6586 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
6587 spin_unlock_irqrestore(
6588 get_ccwdev_lock(dev->cdev), flags);
6589 if (tbcpm < 0)
6590 goto out_err;
6591 paths |= tbcpm;
5db8440c
SH		 6592 }
6593 }
b179b037 6594 /* notify user about all paths affected by CUIR action */
a521b048 6595 dasd_eckd_cuir_notify_user(device, paths, CUIR_QUIESCE);
b179b037
SH		 6596 return 0;
6597out_err:
6598 return tbcpm;
5db8440c
SH		 6599}
6600
6601static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum,
b179b037 6602 struct dasd_cuir_message *cuir)
5db8440c 6603{
543691a4 6604 struct dasd_eckd_private *private = device->private;
5db8440c 6605 struct alias_pav_group *pavgroup, *tempgroup;
5db8440c 6606 struct dasd_device *dev, *n;
b179b037
SH		 6607 unsigned long paths = 0;
6608 int tbcpm;
5db8440c 6609
5db8440c
SH		 6610 /*
6611 * the path may have been added through a generic path event before
6612 * only trigger path verification if the path is not already in use
6613 */
5db8440c
SH		 6614 list_for_each_entry_safe(dev, n,
6615 &private->lcu->active_devices,
6616 alias_list) {
b179b037
SH		 6617 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
6618 paths |= tbcpm;
c9346151
SH		 6619 if (!(dasd_path_get_opm(dev) & tbcpm)) {
6620 dasd_path_add_tbvpm(dev, tbcpm);
5db8440c
SH		 6621 dasd_schedule_device_bh(dev);
6622 }
6623 }
5db8440c
SH		 6624 list_for_each_entry_safe(dev, n,
6625 &private->lcu->inactive_devices,
6626 alias_list) {
b179b037
SH		 6627 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
6628 paths |= tbcpm;
c9346151
SH		 6629 if (!(dasd_path_get_opm(dev) & tbcpm)) {
6630 dasd_path_add_tbvpm(dev, tbcpm);
5db8440c
SH		 6631 dasd_schedule_device_bh(dev);
6632 }
6633 }
5db8440c
SH		 6634 /* devices in PAV groups */
6635 list_for_each_entry_safe(pavgroup, tempgroup,
6636 &private->lcu->grouplist,
6637 group) {
6638 list_for_each_entry_safe(dev, n,
6639 &pavgroup->baselist,
6640 alias_list) {
b179b037
SH		 6641 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
6642 paths |= tbcpm;
c9346151
SH		 6643 if (!(dasd_path_get_opm(dev) & tbcpm)) {
6644 dasd_path_add_tbvpm(dev, tbcpm);
5db8440c
SH		 6645 dasd_schedule_device_bh(dev);
6646 }
6647 }
6648 list_for_each_entry_safe(dev, n,
6649 &pavgroup->aliaslist,
6650 alias_list) {
b179b037
SH		 6651 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
6652 paths |= tbcpm;
c9346151
SH		 6653 if (!(dasd_path_get_opm(dev) & tbcpm)) {
6654 dasd_path_add_tbvpm(dev, tbcpm);
5db8440c
SH		 6655 dasd_schedule_device_bh(dev);
6656 }
6657 }
6658 }
b179b037 6659 /* notify user about all paths affected by CUIR action */
a521b048 6660 dasd_eckd_cuir_notify_user(device, paths, CUIR_RESUME);
b179b037 6661 return 0;
5db8440c
SH		 6662}
6663
6664static void dasd_eckd_handle_cuir(struct dasd_device *device, void *messages,
6665 __u8 lpum)
6666{
6667 struct dasd_cuir_message *cuir = messages;
a521b048 6668 int response;
5db8440c 6669
b179b037
SH		 6670 DBF_DEV_EVENT(DBF_WARNING, device,
6671 "CUIR request: %016llx %016llx %016llx %08x",
6672 ((u64 *)cuir)[0], ((u64 *)cuir)[1], ((u64 *)cuir)[2],
6673 ((u32 *)cuir)[3]);
5db8440c
SH		 6674
6675 if (cuir->code == CUIR_QUIESCE) {
6676 /* quiesce */
a521b048 6677 if (dasd_eckd_cuir_quiesce(device, lpum, cuir))
b179b037
SH		 6678 response = PSF_CUIR_LAST_PATH;
6679 else
6680 response = PSF_CUIR_COMPLETED;
5db8440c
SH		 6681 } else if (cuir->code == CUIR_RESUME) {
6682 /* resume */
a521b048 6683 dasd_eckd_cuir_resume(device, lpum, cuir);
b179b037 6684 response = PSF_CUIR_COMPLETED;
5db8440c
SH		 6685 } else
6686 response = PSF_CUIR_NOT_SUPPORTED;
6687
b179b037 6688 dasd_eckd_psf_cuir_response(device, response,
a521b048 6689 cuir->message_id, lpum);
b179b037
SH		 6690 DBF_DEV_EVENT(DBF_WARNING, device,
6691 "CUIR response: %d on message ID %08x", response,
6692 cuir->message_id);
b179b037
SH		 6693 /* to make sure there is no attention left schedule work again */
6694 device->discipline->check_attention(device, lpum);
5db8440c
SH		 6695}
6696
9e12e54c
JH		 6697static void dasd_eckd_oos_resume(struct dasd_device *device)
6698{
6699 struct dasd_eckd_private *private = device->private;
6700 struct alias_pav_group *pavgroup, *tempgroup;
6701 struct dasd_device *dev, *n;
6702 unsigned long flags;
6703
6704 spin_lock_irqsave(&private->lcu->lock, flags);
6705 list_for_each_entry_safe(dev, n, &private->lcu->active_devices,
6706 alias_list) {
6707 if (dev->stopped & DASD_STOPPED_NOSPC)
6708 dasd_generic_space_avail(dev);
6709 }
6710 list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices,
6711 alias_list) {
6712 if (dev->stopped & DASD_STOPPED_NOSPC)
6713 dasd_generic_space_avail(dev);
6714 }
6715 /* devices in PAV groups */
6716 list_for_each_entry_safe(pavgroup, tempgroup,
6717 &private->lcu->grouplist,
6718 group) {
6719 list_for_each_entry_safe(dev, n, &pavgroup->baselist,
6720 alias_list) {
6721 if (dev->stopped & DASD_STOPPED_NOSPC)
6722 dasd_generic_space_avail(dev);
6723 }
6724 list_for_each_entry_safe(dev, n, &pavgroup->aliaslist,
6725 alias_list) {
6726 if (dev->stopped & DASD_STOPPED_NOSPC)
6727 dasd_generic_space_avail(dev);
6728 }
6729 }
6730 spin_unlock_irqrestore(&private->lcu->lock, flags);
6731}
6732
6733static void dasd_eckd_handle_oos(struct dasd_device *device, void *messages,
6734 __u8 lpum)
6735{
6736 struct dasd_oos_message *oos = messages;
6737
6738 switch (oos->code) {
6739 case REPO_WARN:
6740 case POOL_WARN:
6741 dev_warn(&device->cdev->dev,
6742 "Extent pool usage has reached a critical value\n");
6743 dasd_eckd_oos_resume(device);
6744 break;
6745 case REPO_EXHAUST:
6746 case POOL_EXHAUST:
6747 dev_warn(&device->cdev->dev,
6748 "Extent pool is exhausted\n");
6749 break;
6750 case REPO_RELIEVE:
6751 case POOL_RELIEVE:
6752 dev_info(&device->cdev->dev,
6753 "Extent pool physical space constraint has been relieved\n");
6754 break;
6755 }
6756
6757 /* In any case, update related data */
6758 dasd_eckd_read_ext_pool_info(device);
6759
6760 /* to make sure there is no attention left schedule work again */
6761 device->discipline->check_attention(device, lpum);
6762}
6763
5db8440c
SH		 6764static void dasd_eckd_check_attention_work(struct work_struct *work)
6765{
6766 struct check_attention_work_data *data;
6767 struct dasd_rssd_messages *messages;
6768 struct dasd_device *device;
6769 int rc;
6770
6771 data = container_of(work, struct check_attention_work_data, worker);
6772 device = data->device;
5db8440c
SH		 6773 messages = kzalloc(sizeof(*messages), GFP_KERNEL);
6774 if (!messages) {
6775 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
6776 "Could not allocate attention message buffer");
6777 goto out;
6778 }
5db8440c
SH		 6779 rc = dasd_eckd_read_message_buffer(device, messages, data->lpum);
6780 if (rc)
6781 goto out;
9e12e54c 6782
5db8440c
SH		 6783 if (messages->length == ATTENTION_LENGTH_CUIR &&
6784 messages->format == ATTENTION_FORMAT_CUIR)
6785 dasd_eckd_handle_cuir(device, messages, data->lpum);
9e12e54c
JH		 6786 if (messages->length == ATTENTION_LENGTH_OOS &&
6787 messages->format == ATTENTION_FORMAT_OOS)
6788 dasd_eckd_handle_oos(device, messages, data->lpum);
6789
5db8440c
SH		 6790out:
6791 dasd_put_device(device);
6792 kfree(messages);
6793 kfree(data);
6794}
6795
6796static int dasd_eckd_check_attention(struct dasd_device *device, __u8 lpum)
6797{
6798 struct check_attention_work_data *data;
6799
6800 data = kzalloc(sizeof(*data), GFP_ATOMIC);
6801 if (!data)
6802 return -ENOMEM;
6803 INIT_WORK(&data->worker, dasd_eckd_check_attention_work);
6804 dasd_get_device(device);
6805 data->device = device;
6806 data->lpum = lpum;
6807 schedule_work(&data->worker);
6808 return 0;
6809}
6810
a521b048
SH		 6811static int dasd_eckd_disable_hpf_path(struct dasd_device *device, __u8 lpum)
6812{
6813 if (~lpum & dasd_path_get_opm(device)) {
6814 dasd_path_add_nohpfpm(device, lpum);
6815 dasd_path_remove_opm(device, lpum);
6816 dev_err(&device->cdev->dev,
6817 "Channel path %02X lost HPF functionality and is disabled\n",
6818 lpum);
6819 return 1;
6820 }
6821 return 0;
6822}
6823
6824static void dasd_eckd_disable_hpf_device(struct dasd_device *device)
6825{
6826 struct dasd_eckd_private *private = device->private;
6827
6828 dev_err(&device->cdev->dev,
6829 "High Performance FICON disabled\n");
6830 private->fcx_max_data = 0;
6831}
6832
6833static int dasd_eckd_hpf_enabled(struct dasd_device *device)
6834{
6835 struct dasd_eckd_private *private = device->private;
6836
6837 return private->fcx_max_data ? 1 : 0;
6838}
6839
6840static void dasd_eckd_handle_hpf_error(struct dasd_device *device,
6841 struct irb *irb)
6842{
6843 struct dasd_eckd_private *private = device->private;
6844
6845 if (!private->fcx_max_data) {
6846 /* sanity check for no HPF, the error makes no sense */
6847 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
6848 "Trying to disable HPF for a non HPF device");
6849 return;
6850 }
6851 if (irb->scsw.tm.sesq == SCSW_SESQ_DEV_NOFCX) {
6852 dasd_eckd_disable_hpf_device(device);
6853 } else if (irb->scsw.tm.sesq == SCSW_SESQ_PATH_NOFCX) {
6854 if (dasd_eckd_disable_hpf_path(device, irb->esw.esw1.lpum))
6855 return;
6856 dasd_eckd_disable_hpf_device(device);
6857 dasd_path_set_tbvpm(device,
6858 dasd_path_get_hpfpm(device));
6859 }
6860 /*
6861 * prevent that any new I/O ist started on the device and schedule a
6862 * requeue of existing requests
6863 */
6864 dasd_device_set_stop_bits(device, DASD_STOPPED_NOT_ACC);
6865 dasd_schedule_requeue(device);
6866}
6867
a0610a8a
JH		 6868/*
6869 * Initialize block layer request queue.
6870 */
6871static void dasd_eckd_setup_blk_queue(struct dasd_block *block)
6872{
6873 unsigned int logical_block_size = block->bp_block;
c68f4f4e 6874 struct request_queue *q = block->gdp->queue;
a0610a8a
JH		 6875 struct dasd_device *device = block->base;
6876 int max;
6877
6878 if (device->features & DASD_FEATURE_USERAW) {
6879 /*
6880 * the max_blocks value for raw_track access is 256
6881 * it is higher than the native ECKD value because we
6882 * only need one ccw per track
6883 * so the max_hw_sectors are
6884 * 2048 x 512B = 1024kB = 16 tracks
6885 */
6886 max = DASD_ECKD_MAX_BLOCKS_RAW << block->s2b_shift;
6887 } else {
6888 max = DASD_ECKD_MAX_BLOCKS << block->s2b_shift;
6889 }
6890 blk_queue_flag_set(QUEUE_FLAG_NONROT, q);
6891 q->limits.max_dev_sectors = max;
6892 blk_queue_logical_block_size(q, logical_block_size);
6893 blk_queue_max_hw_sectors(q, max);
6894 blk_queue_max_segments(q, USHRT_MAX);
6895 /* With page sized segments each segment can be translated into one idaw/tidaw */
6896 blk_queue_max_segment_size(q, PAGE_SIZE);
6897 blk_queue_segment_boundary(q, PAGE_SIZE - 1);
bc792884 6898 blk_queue_dma_alignment(q, PAGE_SIZE - 1);
a0610a8a
JH		 6899}
6900
d41dd122 6901static struct ccw_driver dasd_eckd_driver = {
3bda058b
SO		 6902 .driver = {
6903 .name = "dasd-eckd",
6904 .owner = THIS_MODULE,
1987c551 6905 .dev_groups = dasd_dev_groups,
3bda058b 6906 },
d41dd122
SH		 6907 .ids = dasd_eckd_ids,
6908 .probe = dasd_eckd_probe,
6909 .remove = dasd_generic_remove,
6910 .set_offline = dasd_generic_set_offline,
6911 .set_online = dasd_eckd_set_online,
6912 .notify = dasd_generic_notify,
a4d26c6a 6913 .path_event = dasd_generic_path_event,
4679e893 6914 .shutdown = dasd_generic_shutdown,
a23ed009 6915 .uc_handler = dasd_generic_uc_handler,
420f42ec 6916 .int_class = IRQIO_DAS,
d41dd122 6917};
f3eb5384 6918
1da177e4
LT		 6919static struct dasd_discipline dasd_eckd_discipline = {
6920 .owner = THIS_MODULE,
6921 .name = "ECKD",
6922 .ebcname = "ECKD",
1da177e4 6923 .check_device = dasd_eckd_check_characteristics,
8e09f215 6924 .uncheck_device = dasd_eckd_uncheck_device,
1da177e4 6925 .do_analysis = dasd_eckd_do_analysis,
b7294932 6926 .pe_handler = dasd_eckd_pe_handler,
d42e1712 6927 .basic_to_ready = dasd_eckd_basic_to_ready,
8e09f215 6928 .online_to_ready = dasd_eckd_online_to_ready,
daa991bf 6929 .basic_to_known = dasd_eckd_basic_to_known,
a0610a8a 6930 .setup_blk_queue = dasd_eckd_setup_blk_queue,
1da177e4
LT		 6931 .fill_geometry = dasd_eckd_fill_geometry,
6932 .start_IO = dasd_start_IO,
6933 .term_IO = dasd_term_IO,
8e09f215 6934 .handle_terminated_request = dasd_eckd_handle_terminated_request,
1da177e4 6935 .format_device = dasd_eckd_format_device,
8fd57520 6936 .check_device_format = dasd_eckd_check_device_format,
1da177e4
LT		 6937 .erp_action = dasd_eckd_erp_action,
6938 .erp_postaction = dasd_eckd_erp_postaction,
5a27e60d 6939 .check_for_device_change = dasd_eckd_check_for_device_change,
8e09f215
SW		 6940 .build_cp = dasd_eckd_build_alias_cp,
6941 .free_cp = dasd_eckd_free_alias_cp,
1da177e4 6942 .dump_sense = dasd_eckd_dump_sense,
fc19f381 6943 .dump_sense_dbf = dasd_eckd_dump_sense_dbf,
1da177e4 6944 .fill_info = dasd_eckd_fill_info,
1107ccfb 6945 .ioctl = dasd_eckd_ioctl,
501183f2 6946 .reload = dasd_eckd_reload_device,
2dedf0d9 6947 .get_uid = dasd_eckd_get_uid,
f1633031 6948 .kick_validate = dasd_eckd_kick_validate_server,
5db8440c 6949 .check_attention = dasd_eckd_check_attention,
5a3b7b11
SH		 6950 .host_access_count = dasd_eckd_host_access_count,
6951 .hosts_print = dasd_hosts_print,
a521b048
SH		 6952 .handle_hpf_error = dasd_eckd_handle_hpf_error,
6953 .disable_hpf = dasd_eckd_disable_hpf_device,
6954 .hpf_enabled = dasd_eckd_hpf_enabled,
6955 .reset_path = dasd_eckd_reset_path,
c729696b
JH		 6956 .is_ese = dasd_eckd_is_ese,
6957 .space_allocated = dasd_eckd_space_allocated,
6958 .space_configured = dasd_eckd_space_configured,
6959 .logical_capacity = dasd_eckd_logical_capacity,
91dc4a19 6960 .release_space = dasd_eckd_release_space,
c729696b
JH		 6961 .ext_pool_id = dasd_eckd_ext_pool_id,
6962 .ext_size = dasd_eckd_ext_size,
6963 .ext_pool_cap_at_warnlevel = dasd_eckd_ext_pool_cap_at_warnlevel,
6964 .ext_pool_warn_thrshld = dasd_eckd_ext_pool_warn_thrshld,
6965 .ext_pool_oos = dasd_eckd_ext_pool_oos,
9e12e54c 6966 .ext_pool_exhaust = dasd_eckd_ext_pool_exhaust,
5e2b17e7
JH		 6967 .ese_format = dasd_eckd_ese_format,
6968 .ese_read = dasd_eckd_ese_read,
3f217cce 6969 .pprc_status = dasd_eckd_query_pprc_status,
a91ff09d 6970 .pprc_enabled = dasd_eckd_pprc_enabled,
413862ca 6971 .copy_pair_swap = dasd_eckd_copy_pair_swap,
32ff8ce0 6972 .device_ping = dasd_eckd_device_ping,
1da177e4
LT		 6973};
6974
6975static int __init
6976dasd_eckd_init(void)
6977{
736e6ea0
SO		 6978 int ret;
6979
1da177e4 6980 ASCEBC(dasd_eckd_discipline.ebcname, 4);
f932bcea
SW		 6981 dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req),
6982 GFP_KERNEL | GFP_DMA);
6983 if (!dasd_reserve_req)
6984 return -ENOMEM;
9e12e54c
JH		 6985 dasd_vol_info_req = kmalloc(sizeof(*dasd_vol_info_req),
6986 GFP_KERNEL | GFP_DMA);
460e9bed
QL		 6987 if (!dasd_vol_info_req) {
6988 kfree(dasd_reserve_req);
9e12e54c 6989 return -ENOMEM;
460e9bed 6990 }
b7294932
JH		 6991 pe_handler_worker = kmalloc(sizeof(*pe_handler_worker),
6992 GFP_KERNEL | GFP_DMA);
6993 if (!pe_handler_worker) {
a4d26c6a 6994 kfree(dasd_reserve_req);
9e12e54c 6995 kfree(dasd_vol_info_req);
a4d26c6a
SW		 6996 return -ENOMEM;
6997 }
558b9ef0
SW		 6998 rawpadpage = (void *)__get_free_page(GFP_KERNEL);
6999 if (!rawpadpage) {
b7294932 7000 kfree(pe_handler_worker);
558b9ef0 7001 kfree(dasd_reserve_req);
9e12e54c 7002 kfree(dasd_vol_info_req);
558b9ef0
SW		 7003 return -ENOMEM;
7004 }
736e6ea0
SO		 7005 ret = ccw_driver_register(&dasd_eckd_driver);
7006 if (!ret)
7007 wait_for_device_probe();
a4d26c6a 7008 else {
b7294932 7009 kfree(pe_handler_worker);
f932bcea 7010 kfree(dasd_reserve_req);
9e12e54c 7011 kfree(dasd_vol_info_req);
558b9ef0 7012 free_page((unsigned long)rawpadpage);
a4d26c6a 7013 }
736e6ea0 7014 return ret;
1da177e4
LT		 7015}
7016
7017static void __exit
7018dasd_eckd_cleanup(void)
7019{
7020 ccw_driver_unregister(&dasd_eckd_driver);
b7294932 7021 kfree(pe_handler_worker);
f932bcea 7022 kfree(dasd_reserve_req);
558b9ef0 7023 free_page((unsigned long)rawpadpage);
1da177e4
LT		 7024}
7025
7026module_init(dasd_eckd_init);
7027module_exit(dasd_eckd_cleanup);
Linux 6.x block layer and io_uring tree(s)