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Merge branch 'for-next' of git://git.samba.org/sfrench/cifs-2.6
[linux-block.git] / drivers / s390 / block / dasd_eckd.c
CommitLineData
138c014d 1/*
1da177e4 2 * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
138c014d 3 * Horst Hummel <Horst.Hummel@de.ibm.com>
1da177e4
LT		 4 * Carsten Otte <Cotte@de.ibm.com>
5 * Martin Schwidefsky <schwidefsky@de.ibm.com>
6 * Bugreports.to..: <Linux390@de.ibm.com>
d41dd122 7 * Copyright IBM Corp. 1999, 2009
ab1d848f
NH		 8 * EMC Symmetrix ioctl Copyright EMC Corporation, 2008
9 * Author.........: Nigel Hislop <hislop_nigel@emc.com>
1da177e4
LT		 10 */
11
ca99dab0 12#define KMSG_COMPONENT "dasd-eckd"
fc19f381 13
1da177e4
LT		 14#include <linux/stddef.h>
15#include <linux/kernel.h>
16#include <linux/slab.h>
17#include <linux/hdreg.h> /* HDIO_GETGEO */
18#include <linux/bio.h>
19#include <linux/module.h>
048cd4e5 20#include <linux/compat.h>
1da177e4 21#include <linux/init.h>
5a3b7b11 22#include <linux/seq_file.h>
1da177e4 23
382b7366 24#include <asm/css_chars.h>
1da177e4
LT		 25#include <asm/debug.h>
26#include <asm/idals.h>
27#include <asm/ebcdic.h>
28#include <asm/io.h>
1da177e4 29#include <asm/uaccess.h>
40545573 30#include <asm/cio.h>
1da177e4 31#include <asm/ccwdev.h>
f3eb5384 32#include <asm/itcw.h>
5db8440c
SH		 33#include <asm/schid.h>
34#include <asm/chpid.h>
1da177e4
LT		 35
36#include "dasd_int.h"
37#include "dasd_eckd.h"
38
39#ifdef PRINTK_HEADER
40#undef PRINTK_HEADER
41#endif /* PRINTK_HEADER */
42#define PRINTK_HEADER "dasd(eckd):"
43
44#define ECKD_C0(i) (i->home_bytes)
45#define ECKD_F(i) (i->formula)
46#define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\
47 (i->factors.f_0x02.f1))
48#define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\
49 (i->factors.f_0x02.f2))
50#define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\
51 (i->factors.f_0x02.f3))
52#define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0)
53#define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0)
54#define ECKD_F6(i) (i->factor6)
55#define ECKD_F7(i) (i->factor7)
56#define ECKD_F8(i) (i->factor8)
57
e4dbb0f2
SH		 58/*
59 * raw track access always map to 64k in memory
60 * so it maps to 16 blocks of 4k per track
61 */
62#define DASD_RAW_BLOCK_PER_TRACK 16
63#define DASD_RAW_BLOCKSIZE 4096
64/* 64k are 128 x 512 byte sectors */
65#define DASD_RAW_SECTORS_PER_TRACK 128
66
1da177e4
LT		 67MODULE_LICENSE("GPL");
68
69static struct dasd_discipline dasd_eckd_discipline;
70
1da177e4
LT		 71/* The ccw bus type uses this table to find devices that it sends to
72 * dasd_eckd_probe */
73static struct ccw_device_id dasd_eckd_ids[] = {
d2c993d8
HC		 74 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1},
75 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2},
5da24b76 76 { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3380, 0), .driver_info = 0x3},
d2c993d8
HC		 77 { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4},
78 { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5},
79 { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6},
80 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7},
81 { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8},
82 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9},
83 { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa},
1da177e4
LT		 84 { /* end of list */ },
85};
86
87MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids);
88
89static struct ccw_driver dasd_eckd_driver; /* see below */
90
558b9ef0
SW		 91static void *rawpadpage;
92
eb6e199b
SW		 93#define INIT_CQR_OK 0
94#define INIT_CQR_UNFORMATTED 1
95#define INIT_CQR_ERROR 2
96
f932bcea
SW		 97/* emergency request for reserve/release */
98static struct {
99 struct dasd_ccw_req cqr;
100 struct ccw1 ccw;
101 char data[32];
102} *dasd_reserve_req;
103static DEFINE_MUTEX(dasd_reserve_mutex);
104
a4d26c6a
SW		 105/* definitions for the path verification worker */
106struct path_verification_work_data {
107 struct work_struct worker;
108 struct dasd_device *device;
109 struct dasd_ccw_req cqr;
110 struct ccw1 ccw;
111 __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE];
112 int isglobal;
113 __u8 tbvpm;
114};
115static struct path_verification_work_data *path_verification_worker;
116static DEFINE_MUTEX(dasd_path_verification_mutex);
eb6e199b 117
5db8440c
SH		 118struct check_attention_work_data {
119 struct work_struct worker;
120 struct dasd_device *device;
121 __u8 lpum;
122};
123
8fd57520
JH		 124static int prepare_itcw(struct itcw *, unsigned int, unsigned int, int,
125 struct dasd_device *, struct dasd_device *,
126 unsigned int, int, unsigned int, unsigned int,
127 unsigned int, unsigned int);
128
1da177e4
LT		 129/* initial attempt at a probe function. this can be simplified once
130 * the other detection code is gone */
131static int
132dasd_eckd_probe (struct ccw_device *cdev)
133{
134 int ret;
135
40545573 136 /* set ECKD specific ccw-device options */
454e1fa1
PO		 137 ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE |
138 CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH);
40545573 139 if (ret) {
b8ed5dd5
SH		 140 DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s",
141 "dasd_eckd_probe: could not set "
142 "ccw-device options");
1da177e4 143 return ret;
40545573
HH		 144 }
145 ret = dasd_generic_probe(cdev, &dasd_eckd_discipline);
146 return ret;
1da177e4
LT		 147}
148
149static int
150dasd_eckd_set_online(struct ccw_device *cdev)
151{
40545573 152 return dasd_generic_set_online(cdev, &dasd_eckd_discipline);
1da177e4
LT		 153}
154
1da177e4
LT		 155static const int sizes_trk0[] = { 28, 148, 84 };
156#define LABEL_SIZE 140
157
3bc9fef9
SH		 158/* head and record addresses of count_area read in analysis ccw */
159static const int count_area_head[] = { 0, 0, 0, 0, 2 };
160static const int count_area_rec[] = { 1, 2, 3, 4, 1 };
161
1da177e4
LT		 162static inline unsigned int
163round_up_multiple(unsigned int no, unsigned int mult)
164{
165 int rem = no % mult;
166 return (rem ? no - rem + mult : no);
167}
168
169static inline unsigned int
170ceil_quot(unsigned int d1, unsigned int d2)
171{
172 return (d1 + (d2 - 1)) / d2;
173}
174
4d284cac 175static unsigned int
1da177e4
LT		 176recs_per_track(struct dasd_eckd_characteristics * rdc,
177 unsigned int kl, unsigned int dl)
178{
179 int dn, kn;
180
181 switch (rdc->dev_type) {
182 case 0x3380:
183 if (kl)
184 return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) +
185 ceil_quot(dl + 12, 32));
186 else
187 return 1499 / (15 + ceil_quot(dl + 12, 32));
188 case 0x3390:
189 dn = ceil_quot(dl + 6, 232) + 1;
190 if (kl) {
191 kn = ceil_quot(kl + 6, 232) + 1;
192 return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) +
193 9 + ceil_quot(dl + 6 * dn, 34));
194 } else
195 return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34));
196 case 0x9345:
197 dn = ceil_quot(dl + 6, 232) + 1;
198 if (kl) {
199 kn = ceil_quot(kl + 6, 232) + 1;
200 return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) +
201 ceil_quot(dl + 6 * dn, 34));
202 } else
203 return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34));
204 }
205 return 0;
206}
207
b44b0ab3
SW		 208static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head)
209{
210 geo->cyl = (__u16) cyl;
211 geo->head = cyl >> 16;
212 geo->head <<= 4;
213 geo->head |= head;
214}
215
4d284cac 216static int
1da177e4
LT		 217check_XRC (struct ccw1 *de_ccw,
218 struct DE_eckd_data *data,
219 struct dasd_device *device)
220{
543691a4 221 struct dasd_eckd_private *private = device->private;
d54853ef 222 int rc;
1da177e4 223
d54853ef
MS		 224 if (!private->rdc_data.facilities.XRC_supported)
225 return 0;
1da177e4
LT		 226
227 /* switch on System Time Stamp - needed for XRC Support */
d54853ef
MS		 228 data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */
229 data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */
1da177e4 230
40277891 231 rc = get_phys_clock(&data->ep_sys_time);
d54853ef 232 /* Ignore return code if sync clock is switched off. */
a8f6db4d 233 if (rc == -EOPNOTSUPP || rc == -EACCES)
d54853ef 234 rc = 0;
1da177e4 235
8e09f215 236 de_ccw->count = sizeof(struct DE_eckd_data);
d54853ef
MS		 237 de_ccw->flags |= CCW_FLAG_SLI;
238 return rc;
239}
1da177e4 240
4d284cac 241static int
b44b0ab3
SW		 242define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk,
243 unsigned int totrk, int cmd, struct dasd_device *device)
1da177e4 244{
543691a4 245 struct dasd_eckd_private *private = device->private;
b44b0ab3
SW		 246 u32 begcyl, endcyl;
247 u16 heads, beghead, endhead;
d54853ef 248 int rc = 0;
1da177e4 249
1da177e4
LT		 250 ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT;
251 ccw->flags = 0;
252 ccw->count = 16;
253 ccw->cda = (__u32) __pa(data);
254
8e09f215 255 memset(data, 0, sizeof(struct DE_eckd_data));
1da177e4
LT		 256 switch (cmd) {
257 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
258 case DASD_ECKD_CCW_READ_RECORD_ZERO:
259 case DASD_ECKD_CCW_READ:
260 case DASD_ECKD_CCW_READ_MT:
261 case DASD_ECKD_CCW_READ_CKD:
262 case DASD_ECKD_CCW_READ_CKD_MT:
263 case DASD_ECKD_CCW_READ_KD:
264 case DASD_ECKD_CCW_READ_KD_MT:
1da177e4
LT		 265 data->mask.perm = 0x1;
266 data->attributes.operation = private->attrib.operation;
267 break;
8fd57520
JH		 268 case DASD_ECKD_CCW_READ_COUNT:
269 data->mask.perm = 0x1;
270 data->attributes.operation = DASD_BYPASS_CACHE;
271 break;
1da177e4
LT		 272 case DASD_ECKD_CCW_WRITE:
273 case DASD_ECKD_CCW_WRITE_MT:
274 case DASD_ECKD_CCW_WRITE_KD:
275 case DASD_ECKD_CCW_WRITE_KD_MT:
276 data->mask.perm = 0x02;
277 data->attributes.operation = private->attrib.operation;
d54853ef 278 rc = check_XRC (ccw, data, device);
1da177e4
LT		 279 break;
280 case DASD_ECKD_CCW_WRITE_CKD:
281 case DASD_ECKD_CCW_WRITE_CKD_MT:
282 data->attributes.operation = DASD_BYPASS_CACHE;
d54853ef 283 rc = check_XRC (ccw, data, device);
1da177e4
LT		 284 break;
285 case DASD_ECKD_CCW_ERASE:
286 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
287 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
288 data->mask.perm = 0x3;
289 data->mask.auth = 0x1;
290 data->attributes.operation = DASD_BYPASS_CACHE;
d54853ef 291 rc = check_XRC (ccw, data, device);
1da177e4
LT		 292 break;
293 default:
fc19f381
SH		 294 dev_err(&device->cdev->dev,
295 "0x%x is not a known command\n", cmd);
1da177e4
LT		 296 break;
297 }
298
299 data->attributes.mode = 0x3; /* ECKD */
300
301 if ((private->rdc_data.cu_type == 0x2105 ||
302 private->rdc_data.cu_type == 0x2107 ||
303 private->rdc_data.cu_type == 0x1750)
304 && !(private->uses_cdl && trk < 2))
305 data->ga_extended |= 0x40; /* Regular Data Format Mode */
306
b44b0ab3
SW		 307 heads = private->rdc_data.trk_per_cyl;
308 begcyl = trk / heads;
309 beghead = trk % heads;
310 endcyl = totrk / heads;
311 endhead = totrk % heads;
1da177e4
LT		 312
313 /* check for sequential prestage - enhance cylinder range */
314 if (data->attributes.operation == DASD_SEQ_PRESTAGE ||
315 data->attributes.operation == DASD_SEQ_ACCESS) {
138c014d 316
b44b0ab3
SW		 317 if (endcyl + private->attrib.nr_cyl < private->real_cyl)
318 endcyl += private->attrib.nr_cyl;
1da177e4 319 else
b44b0ab3 320 endcyl = (private->real_cyl - 1);
1da177e4
LT		 321 }
322
b44b0ab3
SW		 323 set_ch_t(&data->beg_ext, begcyl, beghead);
324 set_ch_t(&data->end_ext, endcyl, endhead);
d54853ef 325 return rc;
1da177e4
LT		 326}
327
8e09f215
SW		 328static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata,
329 struct dasd_device *device)
330{
543691a4 331 struct dasd_eckd_private *private = device->private;
8e09f215
SW		 332 int rc;
333
8e09f215
SW		 334 if (!private->rdc_data.facilities.XRC_supported)
335 return 0;
336
337 /* switch on System Time Stamp - needed for XRC Support */
f3eb5384
SW		 338 pfxdata->define_extent.ga_extended |= 0x08; /* 'Time Stamp Valid' */
339 pfxdata->define_extent.ga_extended |= 0x02; /* 'Extended Parameter' */
8e09f215
SW		 340 pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */
341
40277891 342 rc = get_phys_clock(&pfxdata->define_extent.ep_sys_time);
8e09f215 343 /* Ignore return code if sync clock is switched off. */
a8f6db4d 344 if (rc == -EOPNOTSUPP || rc == -EACCES)
8e09f215
SW		 345 rc = 0;
346 return rc;
347}
348
f3eb5384
SW		 349static void fill_LRE_data(struct LRE_eckd_data *data, unsigned int trk,
350 unsigned int rec_on_trk, int count, int cmd,
351 struct dasd_device *device, unsigned int reclen,
352 unsigned int tlf)
353{
543691a4 354 struct dasd_eckd_private *private = device->private;
f3eb5384
SW		 355 int sector;
356 int dn, d;
357
f3eb5384
SW		 358 memset(data, 0, sizeof(*data));
359 sector = 0;
360 if (rec_on_trk) {
361 switch (private->rdc_data.dev_type) {
362 case 0x3390:
363 dn = ceil_quot(reclen + 6, 232);
364 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
365 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
366 break;
367 case 0x3380:
368 d = 7 + ceil_quot(reclen + 12, 32);
369 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
370 break;
371 }
372 }
373 data->sector = sector;
374 /* note: meaning of count depends on the operation
375 * for record based I/O it's the number of records, but for
376 * track based I/O it's the number of tracks
377 */
378 data->count = count;
379 switch (cmd) {
380 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
381 data->operation.orientation = 0x3;
382 data->operation.operation = 0x03;
383 break;
384 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
385 data->operation.orientation = 0x3;
386 data->operation.operation = 0x16;
387 break;
388 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
389 data->operation.orientation = 0x1;
390 data->operation.operation = 0x03;
391 data->count++;
392 break;
393 case DASD_ECKD_CCW_READ_RECORD_ZERO:
394 data->operation.orientation = 0x3;
395 data->operation.operation = 0x16;
396 data->count++;
397 break;
398 case DASD_ECKD_CCW_WRITE:
399 case DASD_ECKD_CCW_WRITE_MT:
400 case DASD_ECKD_CCW_WRITE_KD:
401 case DASD_ECKD_CCW_WRITE_KD_MT:
402 data->auxiliary.length_valid = 0x1;
403 data->length = reclen;
404 data->operation.operation = 0x01;
405 break;
406 case DASD_ECKD_CCW_WRITE_CKD:
407 case DASD_ECKD_CCW_WRITE_CKD_MT:
408 data->auxiliary.length_valid = 0x1;
409 data->length = reclen;
410 data->operation.operation = 0x03;
411 break;
e4dbb0f2
SH		 412 case DASD_ECKD_CCW_WRITE_FULL_TRACK:
413 data->operation.orientation = 0x0;
414 data->operation.operation = 0x3F;
415 data->extended_operation = 0x11;
416 data->length = 0;
417 data->extended_parameter_length = 0x02;
418 if (data->count > 8) {
419 data->extended_parameter[0] = 0xFF;
420 data->extended_parameter[1] = 0xFF;
421 data->extended_parameter[1] <<= (16 - count);
422 } else {
423 data->extended_parameter[0] = 0xFF;
424 data->extended_parameter[0] <<= (8 - count);
425 data->extended_parameter[1] = 0x00;
426 }
427 data->sector = 0xFF;
428 break;
f3eb5384
SW		 429 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
430 data->auxiliary.length_valid = 0x1;
431 data->length = reclen; /* not tlf, as one might think */
432 data->operation.operation = 0x3F;
433 data->extended_operation = 0x23;
434 break;
435 case DASD_ECKD_CCW_READ:
436 case DASD_ECKD_CCW_READ_MT:
437 case DASD_ECKD_CCW_READ_KD:
438 case DASD_ECKD_CCW_READ_KD_MT:
439 data->auxiliary.length_valid = 0x1;
440 data->length = reclen;
441 data->operation.operation = 0x06;
442 break;
443 case DASD_ECKD_CCW_READ_CKD:
444 case DASD_ECKD_CCW_READ_CKD_MT:
445 data->auxiliary.length_valid = 0x1;
446 data->length = reclen;
447 data->operation.operation = 0x16;
448 break;
449 case DASD_ECKD_CCW_READ_COUNT:
450 data->operation.operation = 0x06;
451 break;
e4dbb0f2
SH		 452 case DASD_ECKD_CCW_READ_TRACK:
453 data->operation.orientation = 0x1;
454 data->operation.operation = 0x0C;
455 data->extended_parameter_length = 0;
456 data->sector = 0xFF;
457 break;
f3eb5384
SW		 458 case DASD_ECKD_CCW_READ_TRACK_DATA:
459 data->auxiliary.length_valid = 0x1;
460 data->length = tlf;
461 data->operation.operation = 0x0C;
462 break;
463 case DASD_ECKD_CCW_ERASE:
464 data->length = reclen;
465 data->auxiliary.length_valid = 0x1;
466 data->operation.operation = 0x0b;
467 break;
468 default:
469 DBF_DEV_EVENT(DBF_ERR, device,
470 "fill LRE unknown opcode 0x%x", cmd);
471 BUG();
472 }
473 set_ch_t(&data->seek_addr,
474 trk / private->rdc_data.trk_per_cyl,
475 trk % private->rdc_data.trk_per_cyl);
476 data->search_arg.cyl = data->seek_addr.cyl;
477 data->search_arg.head = data->seek_addr.head;
478 data->search_arg.record = rec_on_trk;
479}
480
481static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
482 unsigned int trk, unsigned int totrk, int cmd,
483 struct dasd_device *basedev, struct dasd_device *startdev,
484 unsigned char format, unsigned int rec_on_trk, int count,
485 unsigned int blksize, unsigned int tlf)
8e09f215
SW		 486{
487 struct dasd_eckd_private *basepriv, *startpriv;
f3eb5384
SW		 488 struct DE_eckd_data *dedata;
489 struct LRE_eckd_data *lredata;
b44b0ab3
SW		 490 u32 begcyl, endcyl;
491 u16 heads, beghead, endhead;
8e09f215
SW		 492 int rc = 0;
493
543691a4
SO		 494 basepriv = basedev->private;
495 startpriv = startdev->private;
f3eb5384
SW		 496 dedata = &pfxdata->define_extent;
497 lredata = &pfxdata->locate_record;
8e09f215
SW		 498
499 ccw->cmd_code = DASD_ECKD_CCW_PFX;
500 ccw->flags = 0;
e4dbb0f2
SH		 501 if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) {
502 ccw->count = sizeof(*pfxdata) + 2;
503 ccw->cda = (__u32) __pa(pfxdata);
504 memset(pfxdata, 0, sizeof(*pfxdata) + 2);
505 } else {
506 ccw->count = sizeof(*pfxdata);
507 ccw->cda = (__u32) __pa(pfxdata);
508 memset(pfxdata, 0, sizeof(*pfxdata));
509 }
8e09f215 510
8e09f215 511 /* prefix data */
f3eb5384
SW		 512 if (format > 1) {
513 DBF_DEV_EVENT(DBF_ERR, basedev,
514 "PFX LRE unknown format 0x%x", format);
515 BUG();
516 return -EINVAL;
517 }
518 pfxdata->format = format;
4abb08c2
SW		 519 pfxdata->base_address = basepriv->ned->unit_addr;
520 pfxdata->base_lss = basepriv->ned->ID;
f3eb5384 521 pfxdata->validity.define_extent = 1;
8e09f215
SW		 522
523 /* private uid is kept up to date, conf_data may be outdated */
524 if (startpriv->uid.type != UA_BASE_DEVICE) {
525 pfxdata->validity.verify_base = 1;
526 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS)
527 pfxdata->validity.hyper_pav = 1;
528 }
529
530 /* define extend data (mostly)*/
531 switch (cmd) {
532 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
533 case DASD_ECKD_CCW_READ_RECORD_ZERO:
534 case DASD_ECKD_CCW_READ:
535 case DASD_ECKD_CCW_READ_MT:
536 case DASD_ECKD_CCW_READ_CKD:
537 case DASD_ECKD_CCW_READ_CKD_MT:
538 case DASD_ECKD_CCW_READ_KD:
539 case DASD_ECKD_CCW_READ_KD_MT:
f3eb5384
SW		 540 dedata->mask.perm = 0x1;
541 dedata->attributes.operation = basepriv->attrib.operation;
542 break;
8fd57520
JH		 543 case DASD_ECKD_CCW_READ_COUNT:
544 dedata->mask.perm = 0x1;
545 dedata->attributes.operation = DASD_BYPASS_CACHE;
546 break;
e4dbb0f2 547 case DASD_ECKD_CCW_READ_TRACK:
f3eb5384
SW		 548 case DASD_ECKD_CCW_READ_TRACK_DATA:
549 dedata->mask.perm = 0x1;
550 dedata->attributes.operation = basepriv->attrib.operation;
551 dedata->blk_size = 0;
8e09f215
SW		 552 break;
553 case DASD_ECKD_CCW_WRITE:
554 case DASD_ECKD_CCW_WRITE_MT:
555 case DASD_ECKD_CCW_WRITE_KD:
556 case DASD_ECKD_CCW_WRITE_KD_MT:
f3eb5384
SW		 557 dedata->mask.perm = 0x02;
558 dedata->attributes.operation = basepriv->attrib.operation;
8e09f215
SW		 559 rc = check_XRC_on_prefix(pfxdata, basedev);
560 break;
561 case DASD_ECKD_CCW_WRITE_CKD:
562 case DASD_ECKD_CCW_WRITE_CKD_MT:
f3eb5384 563 dedata->attributes.operation = DASD_BYPASS_CACHE;
8e09f215
SW		 564 rc = check_XRC_on_prefix(pfxdata, basedev);
565 break;
566 case DASD_ECKD_CCW_ERASE:
567 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
568 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
f3eb5384
SW		 569 dedata->mask.perm = 0x3;
570 dedata->mask.auth = 0x1;
571 dedata->attributes.operation = DASD_BYPASS_CACHE;
8e09f215
SW		 572 rc = check_XRC_on_prefix(pfxdata, basedev);
573 break;
e4dbb0f2
SH		 574 case DASD_ECKD_CCW_WRITE_FULL_TRACK:
575 dedata->mask.perm = 0x03;
576 dedata->attributes.operation = basepriv->attrib.operation;
577 dedata->blk_size = 0;
578 break;
f3eb5384
SW		 579 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
580 dedata->mask.perm = 0x02;
581 dedata->attributes.operation = basepriv->attrib.operation;
582 dedata->blk_size = blksize;
583 rc = check_XRC_on_prefix(pfxdata, basedev);
8e09f215 584 break;
f3eb5384
SW		 585 default:
586 DBF_DEV_EVENT(DBF_ERR, basedev,
587 "PFX LRE unknown opcode 0x%x", cmd);
588 BUG();
589 return -EINVAL;
8e09f215
SW		 590 }
591
f3eb5384 592 dedata->attributes.mode = 0x3; /* ECKD */
8e09f215
SW		 593
594 if ((basepriv->rdc_data.cu_type == 0x2105 ||
595 basepriv->rdc_data.cu_type == 0x2107 ||
596 basepriv->rdc_data.cu_type == 0x1750)
597 && !(basepriv->uses_cdl && trk < 2))
f3eb5384 598 dedata->ga_extended |= 0x40; /* Regular Data Format Mode */
8e09f215 599
b44b0ab3
SW		 600 heads = basepriv->rdc_data.trk_per_cyl;
601 begcyl = trk / heads;
602 beghead = trk % heads;
603 endcyl = totrk / heads;
604 endhead = totrk % heads;
8e09f215
SW		 605
606 /* check for sequential prestage - enhance cylinder range */
f3eb5384
SW		 607 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE ||
608 dedata->attributes.operation == DASD_SEQ_ACCESS) {
8e09f215 609
b44b0ab3
SW		 610 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl)
611 endcyl += basepriv->attrib.nr_cyl;
8e09f215 612 else
b44b0ab3 613 endcyl = (basepriv->real_cyl - 1);
8e09f215
SW		 614 }
615
f3eb5384
SW		 616 set_ch_t(&dedata->beg_ext, begcyl, beghead);
617 set_ch_t(&dedata->end_ext, endcyl, endhead);
618
619 if (format == 1) {
620 fill_LRE_data(lredata, trk, rec_on_trk, count, cmd,
621 basedev, blksize, tlf);
622 }
623
8e09f215
SW		 624 return rc;
625}
626
f3eb5384
SW		 627static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
628 unsigned int trk, unsigned int totrk, int cmd,
629 struct dasd_device *basedev, struct dasd_device *startdev)
630{
631 return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev,
632 0, 0, 0, 0, 0);
633}
634
4d284cac 635static void
b44b0ab3
SW		 636locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk,
637 unsigned int rec_on_trk, int no_rec, int cmd,
1da177e4
LT		 638 struct dasd_device * device, int reclen)
639{
543691a4 640 struct dasd_eckd_private *private = device->private;
1da177e4
LT		 641 int sector;
642 int dn, d;
138c014d 643
1da177e4
LT		 644 DBF_DEV_EVENT(DBF_INFO, device,
645 "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d",
646 trk, rec_on_trk, no_rec, cmd, reclen);
647
648 ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD;
649 ccw->flags = 0;
650 ccw->count = 16;
651 ccw->cda = (__u32) __pa(data);
652
8e09f215 653 memset(data, 0, sizeof(struct LO_eckd_data));
1da177e4
LT		 654 sector = 0;
655 if (rec_on_trk) {
656 switch (private->rdc_data.dev_type) {
657 case 0x3390:
658 dn = ceil_quot(reclen + 6, 232);
659 d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34);
660 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
661 break;
662 case 0x3380:
663 d = 7 + ceil_quot(reclen + 12, 32);
664 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
665 break;
666 }
667 }
668 data->sector = sector;
669 data->count = no_rec;
670 switch (cmd) {
671 case DASD_ECKD_CCW_WRITE_HOME_ADDRESS:
672 data->operation.orientation = 0x3;
673 data->operation.operation = 0x03;
674 break;
675 case DASD_ECKD_CCW_READ_HOME_ADDRESS:
676 data->operation.orientation = 0x3;
677 data->operation.operation = 0x16;
678 break;
679 case DASD_ECKD_CCW_WRITE_RECORD_ZERO:
680 data->operation.orientation = 0x1;
681 data->operation.operation = 0x03;
682 data->count++;
683 break;
684 case DASD_ECKD_CCW_READ_RECORD_ZERO:
685 data->operation.orientation = 0x3;
686 data->operation.operation = 0x16;
687 data->count++;
688 break;
689 case DASD_ECKD_CCW_WRITE:
690 case DASD_ECKD_CCW_WRITE_MT:
691 case DASD_ECKD_CCW_WRITE_KD:
692 case DASD_ECKD_CCW_WRITE_KD_MT:
693 data->auxiliary.last_bytes_used = 0x1;
694 data->length = reclen;
695 data->operation.operation = 0x01;
696 break;
697 case DASD_ECKD_CCW_WRITE_CKD:
698 case DASD_ECKD_CCW_WRITE_CKD_MT:
699 data->auxiliary.last_bytes_used = 0x1;
700 data->length = reclen;
701 data->operation.operation = 0x03;
702 break;
703 case DASD_ECKD_CCW_READ:
704 case DASD_ECKD_CCW_READ_MT:
705 case DASD_ECKD_CCW_READ_KD:
706 case DASD_ECKD_CCW_READ_KD_MT:
707 data->auxiliary.last_bytes_used = 0x1;
708 data->length = reclen;
709 data->operation.operation = 0x06;
710 break;
711 case DASD_ECKD_CCW_READ_CKD:
712 case DASD_ECKD_CCW_READ_CKD_MT:
713 data->auxiliary.last_bytes_used = 0x1;
714 data->length = reclen;
715 data->operation.operation = 0x16;
716 break;
717 case DASD_ECKD_CCW_READ_COUNT:
718 data->operation.operation = 0x06;
719 break;
720 case DASD_ECKD_CCW_ERASE:
721 data->length = reclen;
722 data->auxiliary.last_bytes_used = 0x1;
723 data->operation.operation = 0x0b;
724 break;
725 default:
fc19f381
SH		 726 DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record "
727 "opcode 0x%x", cmd);
1da177e4 728 }
b44b0ab3
SW		 729 set_ch_t(&data->seek_addr,
730 trk / private->rdc_data.trk_per_cyl,
731 trk % private->rdc_data.trk_per_cyl);
732 data->search_arg.cyl = data->seek_addr.cyl;
733 data->search_arg.head = data->seek_addr.head;
1da177e4
LT		 734 data->search_arg.record = rec_on_trk;
735}
736
737/*
738 * Returns 1 if the block is one of the special blocks that needs
739 * to get read/written with the KD variant of the command.
740 * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and
741 * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT.
742 * Luckily the KD variants differ only by one bit (0x08) from the
743 * normal variant. So don't wonder about code like:
744 * if (dasd_eckd_cdl_special(blk_per_trk, recid))
745 * ccw->cmd_code |= 0x8;
746 */
747static inline int
748dasd_eckd_cdl_special(int blk_per_trk, int recid)
749{
750 if (recid < 3)
751 return 1;
752 if (recid < blk_per_trk)
753 return 0;
754 if (recid < 2 * blk_per_trk)
755 return 1;
756 return 0;
757}
758
759/*
760 * Returns the record size for the special blocks of the cdl format.
761 * Only returns something useful if dasd_eckd_cdl_special is true
762 * for the recid.
763 */
764static inline int
765dasd_eckd_cdl_reclen(int recid)
766{
767 if (recid < 3)
768 return sizes_trk0[recid];
769 return LABEL_SIZE;
770}
b206181d
SH		 771/* create unique id from private structure. */
772static void create_uid(struct dasd_eckd_private *private)
3d052595 773{
4abb08c2 774 int count;
b206181d 775 struct dasd_uid *uid;
3d052595 776
2dedf0d9 777 uid = &private->uid;
3d052595 778 memset(uid, 0, sizeof(struct dasd_uid));
4abb08c2 779 memcpy(uid->vendor, private->ned->HDA_manufacturer,
d0710c7c 780 sizeof(uid->vendor) - 1);
3d052595 781 EBCASC(uid->vendor, sizeof(uid->vendor) - 1);
4abb08c2 782 memcpy(uid->serial, private->ned->HDA_location,
d0710c7c 783 sizeof(uid->serial) - 1);
3d052595 784 EBCASC(uid->serial, sizeof(uid->serial) - 1);
4abb08c2 785 uid->ssid = private->gneq->subsystemID;
a419aef8 786 uid->real_unit_addr = private->ned->unit_addr;
4abb08c2
SW		 787 if (private->sneq) {
788 uid->type = private->sneq->sua_flags;
8e09f215 789 if (uid->type == UA_BASE_PAV_ALIAS)
4abb08c2 790 uid->base_unit_addr = private->sneq->base_unit_addr;
8e09f215
SW		 791 } else {
792 uid->type = UA_BASE_DEVICE;
793 }
4abb08c2
SW		 794 if (private->vdsneq) {
795 for (count = 0; count < 16; count++) {
796 sprintf(uid->vduit+2*count, "%02x",
797 private->vdsneq->uit[count]);
798 }
799 }
b206181d
SH		 800}
801
802/*
803 * Generate device unique id that specifies the physical device.
804 */
805static int dasd_eckd_generate_uid(struct dasd_device *device)
806{
543691a4 807 struct dasd_eckd_private *private = device->private;
b206181d
SH		 808 unsigned long flags;
809
b206181d
SH		 810 if (!private)
811 return -ENODEV;
812 if (!private->ned || !private->gneq)
813 return -ENODEV;
814 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
815 create_uid(private);
2dedf0d9 816 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
3d052595
HH		 817 return 0;
818}
819
2dedf0d9
SH		 820static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid)
821{
543691a4 822 struct dasd_eckd_private *private = device->private;
2dedf0d9
SH		 823 unsigned long flags;
824
543691a4 825 if (private) {
2dedf0d9
SH		 826 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
827 *uid = private->uid;
828 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
829 return 0;
830 }
831 return -EINVAL;
832}
833
b206181d
SH		 834/*
835 * compare device UID with data of a given dasd_eckd_private structure
836 * return 0 for match
837 */
838static int dasd_eckd_compare_path_uid(struct dasd_device *device,
839 struct dasd_eckd_private *private)
840{
841 struct dasd_uid device_uid;
842
843 create_uid(private);
844 dasd_eckd_get_uid(device, &device_uid);
845
846 return memcmp(&device_uid, &private->uid, sizeof(struct dasd_uid));
847}
848
a4d26c6a
SW		 849static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device,
850 struct dasd_ccw_req *cqr,
851 __u8 *rcd_buffer,
852 __u8 lpm)
17283b56 853{
17283b56 854 struct ccw1 *ccw;
a4d26c6a
SW		 855 /*
856 * buffer has to start with EBCDIC "V1.0" to show
857 * support for virtual device SNEQ
858 */
859 rcd_buffer[0] = 0xE5;
860 rcd_buffer[1] = 0xF1;
861 rcd_buffer[2] = 0x4B;
862 rcd_buffer[3] = 0xF0;
17283b56
CH		 863
864 ccw = cqr->cpaddr;
a4d26c6a
SW		 865 ccw->cmd_code = DASD_ECKD_CCW_RCD;
866 ccw->flags = 0;
17283b56 867 ccw->cda = (__u32)(addr_t)rcd_buffer;
a4d26c6a
SW		 868 ccw->count = DASD_ECKD_RCD_DATA_SIZE;
869 cqr->magic = DASD_ECKD_MAGIC;
17283b56 870
8e09f215
SW		 871 cqr->startdev = device;
872 cqr->memdev = device;
873 cqr->block = NULL;
17283b56
CH		 874 cqr->expires = 10*HZ;
875 cqr->lpm = lpm;
eb6e199b 876 cqr->retries = 256;
1aae0560 877 cqr->buildclk = get_tod_clock();
17283b56 878 cqr->status = DASD_CQR_FILLED;
a4d26c6a
SW		 879 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags);
880}
881
5915a873
SH		 882/*
883 * Wakeup helper for read_conf
884 * if the cqr is not done and needs some error recovery
885 * the buffer has to be re-initialized with the EBCDIC "V1.0"
886 * to show support for virtual device SNEQ
887 */
888static void read_conf_cb(struct dasd_ccw_req *cqr, void *data)
889{
890 struct ccw1 *ccw;
891 __u8 *rcd_buffer;
892
893 if (cqr->status != DASD_CQR_DONE) {
894 ccw = cqr->cpaddr;
895 rcd_buffer = (__u8 *)((addr_t) ccw->cda);
896 memset(rcd_buffer, 0, sizeof(*rcd_buffer));
897
898 rcd_buffer[0] = 0xE5;
899 rcd_buffer[1] = 0xF1;
900 rcd_buffer[2] = 0x4B;
901 rcd_buffer[3] = 0xF0;
902 }
903 dasd_wakeup_cb(cqr, data);
904}
905
a4d26c6a
SW		 906static int dasd_eckd_read_conf_immediately(struct dasd_device *device,
907 struct dasd_ccw_req *cqr,
908 __u8 *rcd_buffer,
909 __u8 lpm)
910{
911 struct ciw *ciw;
912 int rc;
913 /*
914 * sanity check: scan for RCD command in extended SenseID data
915 * some devices do not support RCD
916 */
917 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD);
918 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD)
919 return -EOPNOTSUPP;
920
921 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm);
922 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
5a27e60d 923 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags);
a4d26c6a 924 cqr->retries = 5;
5915a873 925 cqr->callback = read_conf_cb;
a4d26c6a
SW		 926 rc = dasd_sleep_on_immediatly(cqr);
927 return rc;
17283b56
CH		 928}
929
930static int dasd_eckd_read_conf_lpm(struct dasd_device *device,
931 void **rcd_buffer,
932 int *rcd_buffer_size, __u8 lpm)
933{
934 struct ciw *ciw;
935 char *rcd_buf = NULL;
936 int ret;
937 struct dasd_ccw_req *cqr;
938
939 /*
a4d26c6a
SW		 940 * sanity check: scan for RCD command in extended SenseID data
941 * some devices do not support RCD
17283b56
CH		 942 */
943 ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD);
a4d26c6a 944 if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) {
17283b56
CH		 945 ret = -EOPNOTSUPP;
946 goto out_error;
947 }
a4d26c6a 948 rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA);
17283b56
CH		 949 if (!rcd_buf) {
950 ret = -ENOMEM;
951 goto out_error;
952 }
a4d26c6a
SW		 953 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */,
954 0, /* use rcd_buf as data ara */
955 device);
17283b56 956 if (IS_ERR(cqr)) {
a4d26c6a
SW		 957 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
958 "Could not allocate RCD request");
959 ret = -ENOMEM;
17283b56
CH		 960 goto out_error;
961 }
a4d26c6a 962 dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm);
5915a873 963 cqr->callback = read_conf_cb;
17283b56
CH		 964 ret = dasd_sleep_on(cqr);
965 /*
966 * on success we update the user input parms
967 */
8e09f215 968 dasd_sfree_request(cqr, cqr->memdev);
17283b56
CH		 969 if (ret)
970 goto out_error;
971
a4d26c6a 972 *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE;
17283b56
CH		 973 *rcd_buffer = rcd_buf;
974 return 0;
975out_error:
976 kfree(rcd_buf);
977 *rcd_buffer = NULL;
978 *rcd_buffer_size = 0;
979 return ret;
980}
981
4abb08c2
SW		 982static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private)
983{
984
985 struct dasd_sneq *sneq;
986 int i, count;
987
988 private->ned = NULL;
989 private->sneq = NULL;
990 private->vdsneq = NULL;
991 private->gneq = NULL;
992 count = private->conf_len / sizeof(struct dasd_sneq);
993 sneq = (struct dasd_sneq *)private->conf_data;
994 for (i = 0; i < count; ++i) {
995 if (sneq->flags.identifier == 1 && sneq->format == 1)
996 private->sneq = sneq;
997 else if (sneq->flags.identifier == 1 && sneq->format == 4)
998 private->vdsneq = (struct vd_sneq *)sneq;
999 else if (sneq->flags.identifier == 2)
1000 private->gneq = (struct dasd_gneq *)sneq;
1001 else if (sneq->flags.identifier == 3 && sneq->res1 == 1)
1002 private->ned = (struct dasd_ned *)sneq;
1003 sneq++;
1004 }
1005 if (!private->ned || !private->gneq) {
1006 private->ned = NULL;
1007 private->sneq = NULL;
1008 private->vdsneq = NULL;
1009 private->gneq = NULL;
1010 return -EINVAL;
1011 }
1012 return 0;
1013
1014};
1015
1016static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len)
1017{
1018 struct dasd_gneq *gneq;
1019 int i, count, found;
1020
1021 count = conf_len / sizeof(*gneq);
1022 gneq = (struct dasd_gneq *)conf_data;
1023 found = 0;
1024 for (i = 0; i < count; ++i) {
1025 if (gneq->flags.identifier == 2) {
1026 found = 1;
1027 break;
1028 }
1029 gneq++;
1030 }
1031 if (found)
1032 return ((char *)gneq)[18] & 0x07;
1033 else
1034 return 0;
1035}
1036
c7c0c9de
SH		 1037static void dasd_eckd_clear_conf_data(struct dasd_device *device)
1038{
543691a4 1039 struct dasd_eckd_private *private = device->private;
c7c0c9de
SH		 1040 int i;
1041
c7c0c9de
SH		 1042 private->conf_data = NULL;
1043 private->conf_len = 0;
1044 for (i = 0; i < 8; i++) {
c9346151
SH		 1045 kfree(device->path[i].conf_data);
1046 device->path[i].conf_data = NULL;
a521b048
SH		 1047 device->path[i].cssid = 0;
1048 device->path[i].ssid = 0;
1049 device->path[i].chpid = 0;
c7c0c9de
SH		 1050 }
1051}
1052
1053
4abb08c2 1054static int dasd_eckd_read_conf(struct dasd_device *device)
1da177e4
LT		 1055{
1056 void *conf_data;
1057 int conf_len, conf_data_saved;
b179b037 1058 int rc, path_err, pos;
a4d26c6a 1059 __u8 lpm, opm;
b206181d 1060 struct dasd_eckd_private *private, path_private;
b206181d
SH		 1061 struct dasd_uid *uid;
1062 char print_path_uid[60], print_device_uid[60];
a521b048
SH		 1063 struct channel_path_desc *chp_desc;
1064 struct subchannel_id sch_id;
1da177e4 1065
543691a4 1066 private = device->private;
a4d26c6a 1067 opm = ccw_device_get_path_mask(device->cdev);
a521b048 1068 ccw_device_get_schid(device->cdev, &sch_id);
1da177e4 1069 conf_data_saved = 0;
55d3a85c 1070 path_err = 0;
1da177e4
LT		 1071 /* get configuration data per operational path */
1072 for (lpm = 0x80; lpm; lpm>>= 1) {
b206181d
SH		 1073 if (!(lpm & opm))
1074 continue;
1075 rc = dasd_eckd_read_conf_lpm(device, &conf_data,
1076 &conf_len, lpm);
1077 if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */
1078 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1079 "Read configuration data returned "
1080 "error %d", rc);
1081 return rc;
1082 }
1083 if (conf_data == NULL) {
1084 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1085 "No configuration data "
1086 "retrieved");
1087 /* no further analysis possible */
c9346151 1088 dasd_path_add_opm(device, opm);
b206181d
SH		 1089 continue; /* no error */
1090 }
1091 /* save first valid configuration data */
1092 if (!conf_data_saved) {
c7c0c9de
SH		 1093 /* initially clear previously stored conf_data */
1094 dasd_eckd_clear_conf_data(device);
b206181d
SH		 1095 private->conf_data = conf_data;
1096 private->conf_len = conf_len;
1097 if (dasd_eckd_identify_conf_parts(private)) {
1098 private->conf_data = NULL;
1099 private->conf_len = 0;
1100 kfree(conf_data);
1101 continue;
1da177e4 1102 }
c7c0c9de
SH		 1103 pos = pathmask_to_pos(lpm);
1104 /* store per path conf_data */
c9346151 1105 device->path[pos].conf_data = conf_data;
a521b048
SH		 1106 device->path[pos].cssid = sch_id.cssid;
1107 device->path[pos].ssid = sch_id.ssid;
1108 chp_desc = ccw_device_get_chp_desc(device->cdev, pos);
1109 if (chp_desc)
1110 device->path[pos].chpid = chp_desc->chpid;
1111 kfree(chp_desc);
b206181d
SH		 1112 /*
1113 * build device UID that other path data
1114 * can be compared to it
1115 */
1116 dasd_eckd_generate_uid(device);
1117 conf_data_saved++;
1118 } else {
1119 path_private.conf_data = conf_data;
1120 path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE;
1121 if (dasd_eckd_identify_conf_parts(
1122 &path_private)) {
1123 path_private.conf_data = NULL;
1124 path_private.conf_len = 0;
1125 kfree(conf_data);
1126 continue;
1da177e4 1127 }
b206181d
SH		 1128 if (dasd_eckd_compare_path_uid(
1129 device, &path_private)) {
1130 uid = &path_private.uid;
1131 if (strlen(uid->vduit) > 0)
1132 snprintf(print_path_uid,
1133 sizeof(print_path_uid),
1134 "%s.%s.%04x.%02x.%s",
1135 uid->vendor, uid->serial,
1136 uid->ssid, uid->real_unit_addr,
1137 uid->vduit);
1138 else
1139 snprintf(print_path_uid,
1140 sizeof(print_path_uid),
1141 "%s.%s.%04x.%02x",
1142 uid->vendor, uid->serial,
1143 uid->ssid,
1144 uid->real_unit_addr);
1145 uid = &private->uid;
1146 if (strlen(uid->vduit) > 0)
1147 snprintf(print_device_uid,
1148 sizeof(print_device_uid),
1149 "%s.%s.%04x.%02x.%s",
1150 uid->vendor, uid->serial,
1151 uid->ssid, uid->real_unit_addr,
1152 uid->vduit);
1153 else
1154 snprintf(print_device_uid,
1155 sizeof(print_device_uid),
1156 "%s.%s.%04x.%02x",
1157 uid->vendor, uid->serial,
1158 uid->ssid,
1159 uid->real_unit_addr);
1160 dev_err(&device->cdev->dev,
1161 "Not all channel paths lead to "
1162 "the same device, path %02X leads to "
1163 "device %s instead of %s\n", lpm,
1164 print_path_uid, print_device_uid);
55d3a85c 1165 path_err = -EINVAL;
c9346151 1166 dasd_path_add_cablepm(device, lpm);
55d3a85c 1167 continue;
1da177e4 1168 }
c7c0c9de
SH		 1169 pos = pathmask_to_pos(lpm);
1170 /* store per path conf_data */
c9346151 1171 device->path[pos].conf_data = conf_data;
a521b048
SH		 1172 device->path[pos].cssid = sch_id.cssid;
1173 device->path[pos].ssid = sch_id.ssid;
1174 chp_desc = ccw_device_get_chp_desc(device->cdev, pos);
1175 if (chp_desc)
1176 device->path[pos].chpid = chp_desc->chpid;
1177 kfree(chp_desc);
b206181d
SH		 1178 path_private.conf_data = NULL;
1179 path_private.conf_len = 0;
1180 }
1181 switch (dasd_eckd_path_access(conf_data, conf_len)) {
1182 case 0x02:
c9346151 1183 dasd_path_add_nppm(device, lpm);
b206181d
SH		 1184 break;
1185 case 0x03:
c9346151 1186 dasd_path_add_ppm(device, lpm);
b206181d 1187 break;
1da177e4 1188 }
c9346151
SH		 1189 if (!dasd_path_get_opm(device)) {
1190 dasd_path_set_opm(device, lpm);
ccc0e7dc
SH		 1191 dasd_generic_path_operational(device);
1192 } else {
c9346151 1193 dasd_path_add_opm(device, lpm);
ccc0e7dc 1194 }
1da177e4 1195 }
b206181d 1196
55d3a85c 1197 return path_err;
1da177e4
LT		 1198}
1199
a521b048
SH		 1200static u32 get_fcx_max_data(struct dasd_device *device)
1201{
1202 struct dasd_eckd_private *private = device->private;
1203 int fcx_in_css, fcx_in_gneq, fcx_in_features;
1204 int tpm, mdc;
1205
1206 if (dasd_nofcx)
1207 return 0;
1208 /* is transport mode supported? */
1209 fcx_in_css = css_general_characteristics.fcx;
1210 fcx_in_gneq = private->gneq->reserved2[7] & 0x04;
1211 fcx_in_features = private->features.feature[40] & 0x80;
1212 tpm = fcx_in_css && fcx_in_gneq && fcx_in_features;
1213
1214 if (!tpm)
1215 return 0;
1216
1217 mdc = ccw_device_get_mdc(device->cdev, 0);
1218 if (mdc < 0) {
1219 dev_warn(&device->cdev->dev, "Detecting the maximum supported data size for zHPF requests failed\n");
1220 return 0;
1221 } else {
1222 return (u32)mdc * FCX_MAX_DATA_FACTOR;
1223 }
1224}
1225
a4d26c6a
SW		 1226static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm)
1227{
543691a4 1228 struct dasd_eckd_private *private = device->private;
a4d26c6a
SW		 1229 int mdc;
1230 u32 fcx_max_data;
1231
a4d26c6a
SW		 1232 if (private->fcx_max_data) {
1233 mdc = ccw_device_get_mdc(device->cdev, lpm);
1234 if ((mdc < 0)) {
1235 dev_warn(&device->cdev->dev,
1236 "Detecting the maximum data size for zHPF "
1237 "requests failed (rc=%d) for a new path %x\n",
1238 mdc, lpm);
1239 return mdc;
1240 }
0f02c4e7 1241 fcx_max_data = (u32)mdc * FCX_MAX_DATA_FACTOR;
a4d26c6a
SW		 1242 if (fcx_max_data < private->fcx_max_data) {
1243 dev_warn(&device->cdev->dev,
1244 "The maximum data size for zHPF requests %u "
1245 "on a new path %x is below the active maximum "
1246 "%u\n", fcx_max_data, lpm,
1247 private->fcx_max_data);
1248 return -EACCES;
1249 }
1250 }
1251 return 0;
1252}
1253
b206181d
SH		 1254static int rebuild_device_uid(struct dasd_device *device,
1255 struct path_verification_work_data *data)
1256{
543691a4 1257 struct dasd_eckd_private *private = device->private;
c9346151 1258 __u8 lpm, opm = dasd_path_get_opm(device);
543691a4 1259 int rc = -ENODEV;
b206181d
SH		 1260
1261 for (lpm = 0x80; lpm; lpm >>= 1) {
1262 if (!(lpm & opm))
1263 continue;
1264 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer));
1265 memset(&data->cqr, 0, sizeof(data->cqr));
1266 data->cqr.cpaddr = &data->ccw;
1267 rc = dasd_eckd_read_conf_immediately(device, &data->cqr,
1268 data->rcd_buffer,
1269 lpm);
1270
1271 if (rc) {
1272 if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */
1273 continue;
1274 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1275 "Read configuration data "
1276 "returned error %d", rc);
1277 break;
1278 }
1279 memcpy(private->conf_data, data->rcd_buffer,
1280 DASD_ECKD_RCD_DATA_SIZE);
1281 if (dasd_eckd_identify_conf_parts(private)) {
1282 rc = -ENODEV;
1283 } else /* first valid path is enough */
1284 break;
1285 }
1286
1287 if (!rc)
1288 rc = dasd_eckd_generate_uid(device);
1289
1290 return rc;
1291}
1292
a4d26c6a
SW		 1293static void do_path_verification_work(struct work_struct *work)
1294{
1295 struct path_verification_work_data *data;
1296 struct dasd_device *device;
b206181d
SH		 1297 struct dasd_eckd_private path_private;
1298 struct dasd_uid *uid;
1299 __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE];
5db8440c 1300 __u8 lpm, opm, npm, ppm, epm, hpfpm, cablepm;
a4d26c6a 1301 unsigned long flags;
b206181d 1302 char print_uid[60];
a4d26c6a
SW		 1303 int rc;
1304
1305 data = container_of(work, struct path_verification_work_data, worker);
1306 device = data->device;
1307
c8d1c0ff
SH		 1308 /* delay path verification until device was resumed */
1309 if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) {
1310 schedule_work(work);
1311 return;
1312 }
1eb38023
SH		 1313 /* check if path verification already running and delay if so */
1314 if (test_and_set_bit(DASD_FLAG_PATH_VERIFY, &device->flags)) {
1315 schedule_work(work);
1316 return;
1317 }
a4d26c6a
SW		 1318 opm = 0;
1319 npm = 0;
1320 ppm = 0;
1321 epm = 0;
5db8440c
SH		 1322 hpfpm = 0;
1323 cablepm = 0;
1324
a4d26c6a 1325 for (lpm = 0x80; lpm; lpm >>= 1) {
b206181d
SH		 1326 if (!(lpm & data->tbvpm))
1327 continue;
1328 memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer));
1329 memset(&data->cqr, 0, sizeof(data->cqr));
1330 data->cqr.cpaddr = &data->ccw;
1331 rc = dasd_eckd_read_conf_immediately(device, &data->cqr,
1332 data->rcd_buffer,
1333 lpm);
1334 if (!rc) {
1335 switch (dasd_eckd_path_access(data->rcd_buffer,
1336 DASD_ECKD_RCD_DATA_SIZE)
1337 ) {
1338 case 0x02:
1339 npm |= lpm;
1340 break;
1341 case 0x03:
1342 ppm |= lpm;
1343 break;
1344 }
1345 opm |= lpm;
1346 } else if (rc == -EOPNOTSUPP) {
1347 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1348 "path verification: No configuration "
1349 "data retrieved");
1350 opm |= lpm;
1351 } else if (rc == -EAGAIN) {
1352 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
a4d26c6a
SW		 1353 "path verification: device is stopped,"
1354 " try again later");
b206181d
SH		 1355 epm |= lpm;
1356 } else {
1357 dev_warn(&device->cdev->dev,
1358 "Reading device feature codes failed "
1359 "(rc=%d) for new path %x\n", rc, lpm);
1360 continue;
1361 }
1362 if (verify_fcx_max_data(device, lpm)) {
1363 opm &= ~lpm;
1364 npm &= ~lpm;
1365 ppm &= ~lpm;
5db8440c 1366 hpfpm |= lpm;
b206181d
SH		 1367 continue;
1368 }
1369
1370 /*
1371 * save conf_data for comparison after
1372 * rebuild_device_uid may have changed
1373 * the original data
1374 */
1375 memcpy(&path_rcd_buf, data->rcd_buffer,
1376 DASD_ECKD_RCD_DATA_SIZE);
1377 path_private.conf_data = (void *) &path_rcd_buf;
1378 path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE;
1379 if (dasd_eckd_identify_conf_parts(&path_private)) {
1380 path_private.conf_data = NULL;
1381 path_private.conf_len = 0;
1382 continue;
1383 }
1384
1385 /*
1386 * compare path UID with device UID only if at least
1387 * one valid path is left
1388 * in other case the device UID may have changed and
1389 * the first working path UID will be used as device UID
1390 */
c9346151 1391 if (dasd_path_get_opm(device) &&
b206181d
SH		 1392 dasd_eckd_compare_path_uid(device, &path_private)) {
1393 /*
1394 * the comparison was not successful
1395 * rebuild the device UID with at least one
1396 * known path in case a z/VM hyperswap command
1397 * has changed the device
1398 *
1399 * after this compare again
1400 *
1401 * if either the rebuild or the recompare fails
1402 * the path can not be used
1403 */
1404 if (rebuild_device_uid(device, data) ||
1405 dasd_eckd_compare_path_uid(
1406 device, &path_private)) {
1407 uid = &path_private.uid;
1408 if (strlen(uid->vduit) > 0)
1409 snprintf(print_uid, sizeof(print_uid),
1410 "%s.%s.%04x.%02x.%s",
1411 uid->vendor, uid->serial,
1412 uid->ssid, uid->real_unit_addr,
1413 uid->vduit);
1414 else
1415 snprintf(print_uid, sizeof(print_uid),
1416 "%s.%s.%04x.%02x",
1417 uid->vendor, uid->serial,
1418 uid->ssid,
1419 uid->real_unit_addr);
1420 dev_err(&device->cdev->dev,
1421 "The newly added channel path %02X "
1422 "will not be used because it leads "
1423 "to a different device %s\n",
1424 lpm, print_uid);
a4d26c6a
SW		 1425 opm &= ~lpm;
1426 npm &= ~lpm;
1427 ppm &= ~lpm;
5db8440c 1428 cablepm |= lpm;
b206181d 1429 continue;
a4d26c6a
SW		 1430 }
1431 }
b206181d
SH		 1432
1433 /*
1434 * There is a small chance that a path is lost again between
1435 * above path verification and the following modification of
1436 * the device opm mask. We could avoid that race here by using
1437 * yet another path mask, but we rather deal with this unlikely
1438 * situation in dasd_start_IO.
1439 */
1440 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
c9346151
SH		 1441 if (!dasd_path_get_opm(device) && opm) {
1442 dasd_path_set_opm(device, opm);
b206181d 1443 dasd_generic_path_operational(device);
5db8440c 1444 } else {
c9346151 1445 dasd_path_add_opm(device, opm);
5db8440c 1446 }
c9346151
SH		 1447 dasd_path_add_nppm(device, npm);
1448 dasd_path_add_ppm(device, ppm);
1449 dasd_path_add_tbvpm(device, epm);
1450 dasd_path_add_cablepm(device, cablepm);
1451 dasd_path_add_nohpfpm(device, hpfpm);
b206181d 1452 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
a4d26c6a 1453 }
1eb38023 1454 clear_bit(DASD_FLAG_PATH_VERIFY, &device->flags);
a4d26c6a
SW		 1455 dasd_put_device(device);
1456 if (data->isglobal)
1457 mutex_unlock(&dasd_path_verification_mutex);
1458 else
1459 kfree(data);
1460}
1461
1462static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm)
1463{
1464 struct path_verification_work_data *data;
1465
1466 data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA);
1467 if (!data) {
1468 if (mutex_trylock(&dasd_path_verification_mutex)) {
1469 data = path_verification_worker;
1470 data->isglobal = 1;
1471 } else
1472 return -ENOMEM;
1473 } else {
1474 memset(data, 0, sizeof(*data));
1475 data->isglobal = 0;
1476 }
1477 INIT_WORK(&data->worker, do_path_verification_work);
1478 dasd_get_device(device);
1479 data->device = device;
1480 data->tbvpm = lpm;
1481 schedule_work(&data->worker);
1482 return 0;
1483}
1484
a521b048
SH		 1485static void dasd_eckd_reset_path(struct dasd_device *device, __u8 pm)
1486{
1487 struct dasd_eckd_private *private = device->private;
1488 unsigned long flags;
1489
1490 if (!private->fcx_max_data)
1491 private->fcx_max_data = get_fcx_max_data(device);
1492 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
1493 dasd_path_set_tbvpm(device, pm ? : dasd_path_get_notoperpm(device));
1494 dasd_schedule_device_bh(device);
1495 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
1496}
1497
8e09f215
SW		 1498static int dasd_eckd_read_features(struct dasd_device *device)
1499{
543691a4 1500 struct dasd_eckd_private *private = device->private;
8e09f215
SW		 1501 struct dasd_psf_prssd_data *prssdp;
1502 struct dasd_rssd_features *features;
1503 struct dasd_ccw_req *cqr;
1504 struct ccw1 *ccw;
1505 int rc;
8e09f215 1506
68d1e5f0 1507 memset(&private->features, 0, sizeof(struct dasd_rssd_features));
68b781fe 1508 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
8e09f215
SW		 1509 (sizeof(struct dasd_psf_prssd_data) +
1510 sizeof(struct dasd_rssd_features)),
1511 device);
1512 if (IS_ERR(cqr)) {
b8ed5dd5
SH		 1513 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not "
1514 "allocate initialization request");
8e09f215
SW		 1515 return PTR_ERR(cqr);
1516 }
1517 cqr->startdev = device;
1518 cqr->memdev = device;
1519 cqr->block = NULL;
eb6e199b 1520 cqr->retries = 256;
8e09f215
SW		 1521 cqr->expires = 10 * HZ;
1522
1523 /* Prepare for Read Subsystem Data */
1524 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
1525 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
1526 prssdp->order = PSF_ORDER_PRSSD;
1527 prssdp->suborder = 0x41; /* Read Feature Codes */
1528 /* all other bytes of prssdp must be zero */
1529
1530 ccw = cqr->cpaddr;
1531 ccw->cmd_code = DASD_ECKD_CCW_PSF;
1532 ccw->count = sizeof(struct dasd_psf_prssd_data);
1533 ccw->flags |= CCW_FLAG_CC;
1534 ccw->cda = (__u32)(addr_t) prssdp;
1535
1536 /* Read Subsystem Data - feature codes */
1537 features = (struct dasd_rssd_features *) (prssdp + 1);
1538 memset(features, 0, sizeof(struct dasd_rssd_features));
1539
1540 ccw++;
1541 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
1542 ccw->count = sizeof(struct dasd_rssd_features);
1543 ccw->cda = (__u32)(addr_t) features;
1544
1aae0560 1545 cqr->buildclk = get_tod_clock();
8e09f215
SW		 1546 cqr->status = DASD_CQR_FILLED;
1547 rc = dasd_sleep_on(cqr);
1548 if (rc == 0) {
1549 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
1550 features = (struct dasd_rssd_features *) (prssdp + 1);
1551 memcpy(&private->features, features,
1552 sizeof(struct dasd_rssd_features));
68d1e5f0
SW		 1553 } else
1554 dev_warn(&device->cdev->dev, "Reading device feature codes"
1555 " failed with rc=%d\n", rc);
8e09f215
SW		 1556 dasd_sfree_request(cqr, cqr->memdev);
1557 return rc;
1558}
1559
1560
40545573
HH		 1561/*
1562 * Build CP for Perform Subsystem Function - SSC.
1563 */
f3eb5384
SW		 1564static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device,
1565 int enable_pav)
40545573 1566{
8e09f215
SW		 1567 struct dasd_ccw_req *cqr;
1568 struct dasd_psf_ssc_data *psf_ssc_data;
1569 struct ccw1 *ccw;
40545573 1570
68b781fe 1571 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ ,
40545573
HH		 1572 sizeof(struct dasd_psf_ssc_data),
1573 device);
1574
8e09f215 1575 if (IS_ERR(cqr)) {
fc19f381 1576 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
40545573 1577 "Could not allocate PSF-SSC request");
8e09f215
SW		 1578 return cqr;
1579 }
1580 psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data;
1581 psf_ssc_data->order = PSF_ORDER_SSC;
626350b6 1582 psf_ssc_data->suborder = 0xc0;
f3eb5384 1583 if (enable_pav) {
626350b6 1584 psf_ssc_data->suborder |= 0x08;
f3eb5384
SW		 1585 psf_ssc_data->reserved[0] = 0x88;
1586 }
8e09f215
SW		 1587 ccw = cqr->cpaddr;
1588 ccw->cmd_code = DASD_ECKD_CCW_PSF;
1589 ccw->cda = (__u32)(addr_t)psf_ssc_data;
1590 ccw->count = 66;
1591
1592 cqr->startdev = device;
1593 cqr->memdev = device;
1594 cqr->block = NULL;
eb6e199b 1595 cqr->retries = 256;
8e09f215 1596 cqr->expires = 10*HZ;
1aae0560 1597 cqr->buildclk = get_tod_clock();
8e09f215
SW		 1598 cqr->status = DASD_CQR_FILLED;
1599 return cqr;
40545573
HH		 1600}
1601
1602/*
1603 * Perform Subsystem Function.
1604 * It is necessary to trigger CIO for channel revalidation since this
1605 * call might change behaviour of DASD devices.
1606 */
1607static int
12d7b107
SH		 1608dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav,
1609 unsigned long flags)
40545573 1610{
8e09f215
SW		 1611 struct dasd_ccw_req *cqr;
1612 int rc;
1613
f3eb5384 1614 cqr = dasd_eckd_build_psf_ssc(device, enable_pav);
8e09f215
SW		 1615 if (IS_ERR(cqr))
1616 return PTR_ERR(cqr);
1617
12d7b107
SH		 1618 /*
1619 * set flags e.g. turn on failfast, to prevent blocking
1620 * the calling function should handle failed requests
1621 */
1622 cqr->flags |= flags;
1623
8e09f215
SW		 1624 rc = dasd_sleep_on(cqr);
1625 if (!rc)
1626 /* trigger CIO to reprobe devices */
1627 css_schedule_reprobe();
12d7b107
SH		 1628 else if (cqr->intrc == -EAGAIN)
1629 rc = -EAGAIN;
1630
8e09f215
SW		 1631 dasd_sfree_request(cqr, cqr->memdev);
1632 return rc;
40545573
HH		 1633}
1634
1635/*
1636 * Valide storage server of current device.
1637 */
12d7b107
SH		 1638static int dasd_eckd_validate_server(struct dasd_device *device,
1639 unsigned long flags)
40545573 1640{
543691a4
SO		 1641 struct dasd_eckd_private *private = device->private;
1642 int enable_pav, rc;
40545573 1643
f9f8d02f
SH		 1644 if (private->uid.type == UA_BASE_PAV_ALIAS ||
1645 private->uid.type == UA_HYPER_PAV_ALIAS)
12d7b107 1646 return 0;
40545573 1647 if (dasd_nopav || MACHINE_IS_VM)
f3eb5384
SW		 1648 enable_pav = 0;
1649 else
1650 enable_pav = 1;
12d7b107 1651 rc = dasd_eckd_psf_ssc(device, enable_pav, flags);
eb6e199b 1652
8e79a441
HH		 1653 /* may be requested feature is not available on server,
1654 * therefore just report error and go ahead */
b8ed5dd5
SH		 1655 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x "
1656 "returned rc=%d", private->uid.ssid, rc);
12d7b107 1657 return rc;
40545573
HH		 1658}
1659
f1633031
SH		 1660/*
1661 * worker to do a validate server in case of a lost pathgroup
1662 */
1663static void dasd_eckd_do_validate_server(struct work_struct *work)
1664{
1665 struct dasd_device *device = container_of(work, struct dasd_device,
1666 kick_validate);
ea4da6ea
SH		 1667 unsigned long flags = 0;
1668
1669 set_bit(DASD_CQR_FLAGS_FAILFAST, &flags);
1670 if (dasd_eckd_validate_server(device, flags)
12d7b107
SH		 1671 == -EAGAIN) {
1672 /* schedule worker again if failed */
1673 schedule_work(&device->kick_validate);
1674 return;
1675 }
1676
f1633031
SH		 1677 dasd_put_device(device);
1678}
1679
1680static void dasd_eckd_kick_validate_server(struct dasd_device *device)
1681{
1682 dasd_get_device(device);
25e2cf1c
SH		 1683 /* exit if device not online or in offline processing */
1684 if (test_bit(DASD_FLAG_OFFLINE, &device->flags) ||
1685 device->state < DASD_STATE_ONLINE) {
1686 dasd_put_device(device);
1687 return;
1688 }
f1633031 1689 /* queue call to do_validate_server to the kernel event daemon. */
f2608cd4
SH		 1690 if (!schedule_work(&device->kick_validate))
1691 dasd_put_device(device);
f1633031
SH		 1692}
1693
3d052595
HH		 1694/*
1695 * Check device characteristics.
1696 * If the device is accessible using ECKD discipline, the device is enabled.
1697 */
1da177e4
LT		 1698static int
1699dasd_eckd_check_characteristics(struct dasd_device *device)
1700{
543691a4 1701 struct dasd_eckd_private *private = device->private;
8e09f215 1702 struct dasd_block *block;
2dedf0d9 1703 struct dasd_uid temp_uid;
f9f8d02f 1704 int rc, i;
33b62a30 1705 int readonly;
7c8faa86 1706 unsigned long value;
1da177e4 1707
f1633031
SH		 1708 /* setup work queue for validate server*/
1709 INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server);
59a9ed5f
SH		 1710 /* setup work queue for summary unit check */
1711 INIT_WORK(&device->suc_work, dasd_alias_handle_summary_unit_check);
f1633031 1712
454e1fa1
PO		 1713 if (!ccw_device_is_pathgroup(device->cdev)) {
1714 dev_warn(&device->cdev->dev,
1715 "A channel path group could not be established\n");
1716 return -EIO;
1717 }
1718 if (!ccw_device_is_multipath(device->cdev)) {
1719 dev_info(&device->cdev->dev,
1720 "The DASD is not operating in multipath mode\n");
1721 }
92636b15
SO		 1722 if (!private) {
1723 private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA);
1724 if (!private) {
fc19f381
SH		 1725 dev_warn(&device->cdev->dev,
1726 "Allocating memory for private DASD data "
1727 "failed\n");
1da177e4
LT		 1728 return -ENOMEM;
1729 }
543691a4 1730 device->private = private;
92636b15
SO		 1731 } else {
1732 memset(private, 0, sizeof(*private));
1da177e4
LT		 1733 }
1734 /* Invalidate status of initial analysis. */
1735 private->init_cqr_status = -1;
1736 /* Set default cache operations. */
1737 private->attrib.operation = DASD_NORMAL_CACHE;
1738 private->attrib.nr_cyl = 0;
1739
40545573
HH		 1740 /* Read Configuration Data */
1741 rc = dasd_eckd_read_conf(device);
1742 if (rc)
8e09f215 1743 goto out_err1;
40545573 1744
a521b048 1745 /* set some default values */
7c8faa86 1746 device->default_expires = DASD_EXPIRES;
1f1ee9ad 1747 device->default_retries = DASD_RETRIES;
a521b048
SH		 1748 device->path_thrhld = DASD_ECKD_PATH_THRHLD;
1749 device->path_interval = DASD_ECKD_PATH_INTERVAL;
1f1ee9ad 1750
7c8faa86
SH		 1751 if (private->gneq) {
1752 value = 1;
1753 for (i = 0; i < private->gneq->timeout.value; i++)
1754 value = 10 * value;
1755 value = value * private->gneq->timeout.number;
1756 /* do not accept useless values */
1757 if (value != 0 && value <= DASD_EXPIRES_MAX)
1758 device->default_expires = value;
1759 }
1760
2dedf0d9
SH		 1761 dasd_eckd_get_uid(device, &temp_uid);
1762 if (temp_uid.type == UA_BASE_DEVICE) {
8e09f215
SW		 1763 block = dasd_alloc_block();
1764 if (IS_ERR(block)) {
b8ed5dd5
SH		 1765 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
1766 "could not allocate dasd "
1767 "block structure");
8e09f215
SW		 1768 rc = PTR_ERR(block);
1769 goto out_err1;
1770 }
1771 device->block = block;
1772 block->base = device;
1773 }
1774
f9f8d02f
SH		 1775 /* register lcu with alias handling, enable PAV */
1776 rc = dasd_alias_make_device_known_to_lcu(device);
1777 if (rc)
8e09f215 1778 goto out_err2;
f9f8d02f 1779
12d7b107 1780 dasd_eckd_validate_server(device, 0);
f4ac1d02
SW		 1781
1782 /* device may report different configuration data after LCU setup */
1783 rc = dasd_eckd_read_conf(device);
1784 if (rc)
1785 goto out_err3;
8e09f215
SW		 1786
1787 /* Read Feature Codes */
68d1e5f0 1788 dasd_eckd_read_features(device);
40545573 1789
1da177e4 1790 /* Read Device Characteristics */
68b781fe
SH		 1791 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
1792 &private->rdc_data, 64);
8e09f215 1793 if (rc) {
b8ed5dd5
SH		 1794 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
1795 "Read device characteristic failed, rc=%d", rc);
8e09f215
SW		 1796 goto out_err3;
1797 }
34cd551a
SH		 1798
1799 if ((device->features & DASD_FEATURE_USERAW) &&
1800 !(private->rdc_data.facilities.RT_in_LR)) {
1801 dev_err(&device->cdev->dev, "The storage server does not "
1802 "support raw-track access\n");
1803 rc = -EINVAL;
1804 goto out_err3;
1805 }
1806
817f2c84 1807 /* find the valid cylinder size */
b44b0ab3
SW		 1808 if (private->rdc_data.no_cyl == LV_COMPAT_CYL &&
1809 private->rdc_data.long_no_cyl)
1810 private->real_cyl = private->rdc_data.long_no_cyl;
1811 else
1812 private->real_cyl = private->rdc_data.no_cyl;
1813
ef19298b
SW		 1814 private->fcx_max_data = get_fcx_max_data(device);
1815
33b62a30
SW		 1816 readonly = dasd_device_is_ro(device);
1817 if (readonly)
1818 set_bit(DASD_FLAG_DEVICE_RO, &device->flags);
1819
fc19f381 1820 dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) "
33b62a30 1821 "with %d cylinders, %d heads, %d sectors%s\n",
fc19f381
SH		 1822 private->rdc_data.dev_type,
1823 private->rdc_data.dev_model,
1824 private->rdc_data.cu_type,
1825 private->rdc_data.cu_model.model,
92636b15 1826 private->real_cyl,
fc19f381 1827 private->rdc_data.trk_per_cyl,
33b62a30
SW		 1828 private->rdc_data.sec_per_trk,
1829 readonly ? ", read-only device" : "");
8e09f215
SW		 1830 return 0;
1831
1832out_err3:
1833 dasd_alias_disconnect_device_from_lcu(device);
1834out_err2:
1835 dasd_free_block(device->block);
1836 device->block = NULL;
1837out_err1:
4abb08c2 1838 kfree(private->conf_data);
8e09f215
SW		 1839 kfree(device->private);
1840 device->private = NULL;
3d052595 1841 return rc;
1da177e4
LT		 1842}
1843
8e09f215
SW		 1844static void dasd_eckd_uncheck_device(struct dasd_device *device)
1845{
543691a4 1846 struct dasd_eckd_private *private = device->private;
b179b037 1847 int i;
4abb08c2 1848
8e09f215 1849 dasd_alias_disconnect_device_from_lcu(device);
4abb08c2
SW		 1850 private->ned = NULL;
1851 private->sneq = NULL;
1852 private->vdsneq = NULL;
1853 private->gneq = NULL;
1854 private->conf_len = 0;
b179b037 1855 for (i = 0; i < 8; i++) {
c9346151
SH		 1856 kfree(device->path[i].conf_data);
1857 if ((__u8 *)device->path[i].conf_data ==
b179b037
SH		 1858 private->conf_data) {
1859 private->conf_data = NULL;
1860 private->conf_len = 0;
1861 }
c9346151 1862 device->path[i].conf_data = NULL;
a521b048
SH		 1863 device->path[i].cssid = 0;
1864 device->path[i].ssid = 0;
1865 device->path[i].chpid = 0;
b179b037 1866 }
4abb08c2
SW		 1867 kfree(private->conf_data);
1868 private->conf_data = NULL;
8e09f215
SW		 1869}
1870
1da177e4
LT		 1871static struct dasd_ccw_req *
1872dasd_eckd_analysis_ccw(struct dasd_device *device)
1873{
543691a4 1874 struct dasd_eckd_private *private = device->private;
1da177e4
LT		 1875 struct eckd_count *count_data;
1876 struct LO_eckd_data *LO_data;
1877 struct dasd_ccw_req *cqr;
1878 struct ccw1 *ccw;
1879 int cplength, datasize;
1880 int i;
1881
1da177e4
LT		 1882 cplength = 8;
1883 datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data);
68b781fe 1884 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device);
1da177e4
LT		 1885 if (IS_ERR(cqr))
1886 return cqr;
1887 ccw = cqr->cpaddr;
1888 /* Define extent for the first 3 tracks. */
1889 define_extent(ccw++, cqr->data, 0, 2,
1890 DASD_ECKD_CCW_READ_COUNT, device);
8e09f215 1891 LO_data = cqr->data + sizeof(struct DE_eckd_data);
1da177e4
LT		 1892 /* Locate record for the first 4 records on track 0. */
1893 ccw[-1].flags |= CCW_FLAG_CC;
1894 locate_record(ccw++, LO_data++, 0, 0, 4,
1895 DASD_ECKD_CCW_READ_COUNT, device, 0);
1896
1897 count_data = private->count_area;
1898 for (i = 0; i < 4; i++) {
1899 ccw[-1].flags |= CCW_FLAG_CC;
1900 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
1901 ccw->flags = 0;
1902 ccw->count = 8;
1903 ccw->cda = (__u32)(addr_t) count_data;
1904 ccw++;
1905 count_data++;
1906 }
1907
1908 /* Locate record for the first record on track 2. */
1909 ccw[-1].flags |= CCW_FLAG_CC;
1910 locate_record(ccw++, LO_data++, 2, 0, 1,
1911 DASD_ECKD_CCW_READ_COUNT, device, 0);
1912 /* Read count ccw. */
1913 ccw[-1].flags |= CCW_FLAG_CC;
1914 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
1915 ccw->flags = 0;
1916 ccw->count = 8;
1917 ccw->cda = (__u32)(addr_t) count_data;
1918
8e09f215
SW		 1919 cqr->block = NULL;
1920 cqr->startdev = device;
1921 cqr->memdev = device;
eb6e199b 1922 cqr->retries = 255;
1aae0560 1923 cqr->buildclk = get_tod_clock();
1da177e4
LT		 1924 cqr->status = DASD_CQR_FILLED;
1925 return cqr;
1926}
1927
eb6e199b
SW		 1928/* differentiate between 'no record found' and any other error */
1929static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr)
1930{
1931 char *sense;
1932 if (init_cqr->status == DASD_CQR_DONE)
1933 return INIT_CQR_OK;
1934 else if (init_cqr->status == DASD_CQR_NEED_ERP ||
1935 init_cqr->status == DASD_CQR_FAILED) {
1936 sense = dasd_get_sense(&init_cqr->irb);
1937 if (sense && (sense[1] & SNS1_NO_REC_FOUND))
1938 return INIT_CQR_UNFORMATTED;
1939 else
1940 return INIT_CQR_ERROR;
1941 } else
1942 return INIT_CQR_ERROR;
1943}
1944
1da177e4
LT		 1945/*
1946 * This is the callback function for the init_analysis cqr. It saves
1947 * the status of the initial analysis ccw before it frees it and kicks
1948 * the device to continue the startup sequence. This will call
1949 * dasd_eckd_do_analysis again (if the devices has not been marked
1950 * for deletion in the meantime).
1951 */
eb6e199b
SW		 1952static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr,
1953 void *data)
1da177e4 1954{
543691a4
SO		 1955 struct dasd_device *device = init_cqr->startdev;
1956 struct dasd_eckd_private *private = device->private;
1da177e4 1957
eb6e199b 1958 private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr);
1da177e4
LT		 1959 dasd_sfree_request(init_cqr, device);
1960 dasd_kick_device(device);
1961}
1962
eb6e199b 1963static int dasd_eckd_start_analysis(struct dasd_block *block)
1da177e4 1964{
1da177e4
LT		 1965 struct dasd_ccw_req *init_cqr;
1966
8e09f215 1967 init_cqr = dasd_eckd_analysis_ccw(block->base);
1da177e4
LT		 1968 if (IS_ERR(init_cqr))
1969 return PTR_ERR(init_cqr);
1970 init_cqr->callback = dasd_eckd_analysis_callback;
1971 init_cqr->callback_data = NULL;
1972 init_cqr->expires = 5*HZ;
eb6e199b
SW		 1973 /* first try without ERP, so we can later handle unformatted
1974 * devices as special case
1975 */
1976 clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags);
1977 init_cqr->retries = 0;
1da177e4
LT		 1978 dasd_add_request_head(init_cqr);
1979 return -EAGAIN;
1980}
1981
eb6e199b 1982static int dasd_eckd_end_analysis(struct dasd_block *block)
1da177e4 1983{
543691a4
SO		 1984 struct dasd_device *device = block->base;
1985 struct dasd_eckd_private *private = device->private;
1da177e4
LT		 1986 struct eckd_count *count_area;
1987 unsigned int sb, blk_per_trk;
1988 int status, i;
eb6e199b 1989 struct dasd_ccw_req *init_cqr;
1da177e4 1990
1da177e4
LT		 1991 status = private->init_cqr_status;
1992 private->init_cqr_status = -1;
eb6e199b
SW		 1993 if (status == INIT_CQR_ERROR) {
1994 /* try again, this time with full ERP */
1995 init_cqr = dasd_eckd_analysis_ccw(device);
1996 dasd_sleep_on(init_cqr);
1997 status = dasd_eckd_analysis_evaluation(init_cqr);
1998 dasd_sfree_request(init_cqr, device);
1999 }
2000
e4dbb0f2
SH		 2001 if (device->features & DASD_FEATURE_USERAW) {
2002 block->bp_block = DASD_RAW_BLOCKSIZE;
2003 blk_per_trk = DASD_RAW_BLOCK_PER_TRACK;
2004 block->s2b_shift = 3;
2005 goto raw;
2006 }
2007
eb6e199b
SW		 2008 if (status == INIT_CQR_UNFORMATTED) {
2009 dev_warn(&device->cdev->dev, "The DASD is not formatted\n");
1da177e4 2010 return -EMEDIUMTYPE;
eb6e199b
SW		 2011 } else if (status == INIT_CQR_ERROR) {
2012 dev_err(&device->cdev->dev,
2013 "Detecting the DASD disk layout failed because "
2014 "of an I/O error\n");
2015 return -EIO;
1da177e4
LT		 2016 }
2017
2018 private->uses_cdl = 1;
1da177e4
LT		 2019 /* Check Track 0 for Compatible Disk Layout */
2020 count_area = NULL;
2021 for (i = 0; i < 3; i++) {
2022 if (private->count_area[i].kl != 4 ||
3bc9fef9
SH		 2023 private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 ||
2024 private->count_area[i].cyl != 0 ||
2025 private->count_area[i].head != count_area_head[i] ||
2026 private->count_area[i].record != count_area_rec[i]) {
1da177e4
LT		 2027 private->uses_cdl = 0;
2028 break;
2029 }
2030 }
2031 if (i == 3)
2032 count_area = &private->count_area[4];
2033
2034 if (private->uses_cdl == 0) {
2035 for (i = 0; i < 5; i++) {
2036 if ((private->count_area[i].kl != 0) ||
2037 (private->count_area[i].dl !=
3bc9fef9
SH		 2038 private->count_area[0].dl) ||
2039 private->count_area[i].cyl != 0 ||
2040 private->count_area[i].head != count_area_head[i] ||
2041 private->count_area[i].record != count_area_rec[i])
1da177e4
LT		 2042 break;
2043 }
2044 if (i == 5)
2045 count_area = &private->count_area[0];
2046 } else {
2047 if (private->count_area[3].record == 1)
fc19f381
SH		 2048 dev_warn(&device->cdev->dev,
2049 "Track 0 has no records following the VTOC\n");
1da177e4 2050 }
e4dbb0f2 2051
1da177e4
LT		 2052 if (count_area != NULL && count_area->kl == 0) {
2053 /* we found notthing violating our disk layout */
2054 if (dasd_check_blocksize(count_area->dl) == 0)
8e09f215 2055 block->bp_block = count_area->dl;
1da177e4 2056 }
8e09f215 2057 if (block->bp_block == 0) {
fc19f381
SH		 2058 dev_warn(&device->cdev->dev,
2059 "The disk layout of the DASD is not supported\n");
1da177e4
LT		 2060 return -EMEDIUMTYPE;
2061 }
8e09f215
SW		 2062 block->s2b_shift = 0; /* bits to shift 512 to get a block */
2063 for (sb = 512; sb < block->bp_block; sb = sb << 1)
2064 block->s2b_shift++;
1da177e4 2065
8e09f215 2066 blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block);
e4dbb0f2
SH		 2067
2068raw:
b44b0ab3 2069 block->blocks = (private->real_cyl *
1da177e4
LT		 2070 private->rdc_data.trk_per_cyl *
2071 blk_per_trk);
2072
fc19f381
SH		 2073 dev_info(&device->cdev->dev,
2074 "DASD with %d KB/block, %d KB total size, %d KB/track, "
2075 "%s\n", (block->bp_block >> 10),
2076 ((private->real_cyl *
2077 private->rdc_data.trk_per_cyl *
2078 blk_per_trk * (block->bp_block >> 9)) >> 1),
2079 ((blk_per_trk * block->bp_block) >> 10),
2080 private->uses_cdl ?
2081 "compatible disk layout" : "linux disk layout");
1da177e4
LT		 2082
2083 return 0;
2084}
2085
8e09f215 2086static int dasd_eckd_do_analysis(struct dasd_block *block)
1da177e4 2087{
543691a4 2088 struct dasd_eckd_private *private = block->base->private;
1da177e4 2089
1da177e4 2090 if (private->init_cqr_status < 0)
8e09f215 2091 return dasd_eckd_start_analysis(block);
1da177e4 2092 else
8e09f215 2093 return dasd_eckd_end_analysis(block);
1da177e4
LT		 2094}
2095
d42e1712 2096static int dasd_eckd_basic_to_ready(struct dasd_device *device)
8e09f215
SW		 2097{
2098 return dasd_alias_add_device(device);
2099};
2100
2101static int dasd_eckd_online_to_ready(struct dasd_device *device)
2102{
501183f2 2103 cancel_work_sync(&device->reload_device);
25e2cf1c 2104 cancel_work_sync(&device->kick_validate);
d42e1712
SH		 2105 return 0;
2106};
2107
daa991bf 2108static int dasd_eckd_basic_to_known(struct dasd_device *device)
d42e1712 2109{
8e09f215
SW		 2110 return dasd_alias_remove_device(device);
2111};
2112
1da177e4 2113static int
8e09f215 2114dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo)
1da177e4 2115{
543691a4 2116 struct dasd_eckd_private *private = block->base->private;
1da177e4 2117
8e09f215 2118 if (dasd_check_blocksize(block->bp_block) == 0) {
1da177e4 2119 geo->sectors = recs_per_track(&private->rdc_data,
8e09f215 2120 0, block->bp_block);
1da177e4
LT		 2121 }
2122 geo->cylinders = private->rdc_data.no_cyl;
2123 geo->heads = private->rdc_data.trk_per_cyl;
2124 return 0;
2125}
2126
8fd57520
JH		 2127/*
2128 * Build the TCW request for the format check
2129 */
2130static struct dasd_ccw_req *
2131dasd_eckd_build_check_tcw(struct dasd_device *base, struct format_data_t *fdata,
2132 int enable_pav, struct eckd_count *fmt_buffer,
2133 int rpt)
2134{
2135 struct dasd_eckd_private *start_priv;
2136 struct dasd_device *startdev = NULL;
2137 struct tidaw *last_tidaw = NULL;
2138 struct dasd_ccw_req *cqr;
2139 struct itcw *itcw;
2140 int itcw_size;
2141 int count;
2142 int rc;
2143 int i;
2144
2145 if (enable_pav)
2146 startdev = dasd_alias_get_start_dev(base);
2147
2148 if (!startdev)
2149 startdev = base;
2150
2151 start_priv = startdev->private;
2152
2153 count = rpt * (fdata->stop_unit - fdata->start_unit + 1);
2154
2155 /*
2156 * we're adding 'count' amount of tidaw to the itcw.
2157 * calculate the corresponding itcw_size
2158 */
2159 itcw_size = itcw_calc_size(0, count, 0);
2160
2161 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev);
2162 if (IS_ERR(cqr))
2163 return cqr;
2164
2165 start_priv->count++;
2166
2167 itcw = itcw_init(cqr->data, itcw_size, ITCW_OP_READ, 0, count, 0);
2168 if (IS_ERR(itcw)) {
2169 rc = -EINVAL;
2170 goto out_err;
2171 }
2172
2173 cqr->cpaddr = itcw_get_tcw(itcw);
2174 rc = prepare_itcw(itcw, fdata->start_unit, fdata->stop_unit,
2175 DASD_ECKD_CCW_READ_COUNT_MT, base, startdev, 0, count,
2176 sizeof(struct eckd_count),
2177 count * sizeof(struct eckd_count), 0, rpt);
2178 if (rc)
2179 goto out_err;
2180
2181 for (i = 0; i < count; i++) {
2182 last_tidaw = itcw_add_tidaw(itcw, 0, fmt_buffer++,
2183 sizeof(struct eckd_count));
2184 if (IS_ERR(last_tidaw)) {
2185 rc = -EINVAL;
2186 goto out_err;
2187 }
2188 }
2189
2190 last_tidaw->flags |= TIDAW_FLAGS_LAST;
2191 itcw_finalize(itcw);
2192
2193 cqr->cpmode = 1;
2194 cqr->startdev = startdev;
2195 cqr->memdev = startdev;
2196 cqr->basedev = base;
2197 cqr->retries = startdev->default_retries;
2198 cqr->expires = startdev->default_expires * HZ;
2199 cqr->buildclk = get_tod_clock();
2200 cqr->status = DASD_CQR_FILLED;
2201 /* Set flags to suppress output for expected errors */
2202 set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags);
2203 set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags);
2204
2205 return cqr;
2206
2207out_err:
2208 dasd_sfree_request(cqr, startdev);
2209
2210 return ERR_PTR(rc);
2211}
2212
2213/*
2214 * Build the CCW request for the format check
2215 */
2216static struct dasd_ccw_req *
2217dasd_eckd_build_check(struct dasd_device *base, struct format_data_t *fdata,
2218 int enable_pav, struct eckd_count *fmt_buffer, int rpt)
2219{
2220 struct dasd_eckd_private *start_priv;
2221 struct dasd_eckd_private *base_priv;
2222 struct dasd_device *startdev = NULL;
2223 struct dasd_ccw_req *cqr;
2224 struct ccw1 *ccw;
2225 void *data;
2226 int cplength, datasize;
2227 int use_prefix;
2228 int count;
2229 int i;
2230
2231 if (enable_pav)
2232 startdev = dasd_alias_get_start_dev(base);
2233
2234 if (!startdev)
2235 startdev = base;
2236
2237 start_priv = startdev->private;
2238 base_priv = base->private;
2239
2240 count = rpt * (fdata->stop_unit - fdata->start_unit + 1);
2241
2242 use_prefix = base_priv->features.feature[8] & 0x01;
2243
2244 if (use_prefix) {
2245 cplength = 1;
2246 datasize = sizeof(struct PFX_eckd_data);
2247 } else {
2248 cplength = 2;
2249 datasize = sizeof(struct DE_eckd_data) +
2250 sizeof(struct LO_eckd_data);
2251 }
2252 cplength += count;
2253
2254 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
2255 startdev);
2256 if (IS_ERR(cqr))
2257 return cqr;
2258
2259 start_priv->count++;
2260 data = cqr->data;
2261 ccw = cqr->cpaddr;
2262
2263 if (use_prefix) {
2264 prefix_LRE(ccw++, data, fdata->start_unit, fdata->stop_unit,
2265 DASD_ECKD_CCW_READ_COUNT, base, startdev, 1, 0,
2266 count, 0, 0);
2267 } else {
2268 define_extent(ccw++, data, fdata->start_unit, fdata->stop_unit,
2269 DASD_ECKD_CCW_READ_COUNT, startdev);
2270
2271 data += sizeof(struct DE_eckd_data);
2272 ccw[-1].flags |= CCW_FLAG_CC;
2273
2274 locate_record(ccw++, data, fdata->start_unit, 0, count,
2275 DASD_ECKD_CCW_READ_COUNT, base, 0);
2276 }
2277
2278 for (i = 0; i < count; i++) {
2279 ccw[-1].flags |= CCW_FLAG_CC;
2280 ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT;
2281 ccw->flags = CCW_FLAG_SLI;
2282 ccw->count = 8;
2283 ccw->cda = (__u32)(addr_t) fmt_buffer;
2284 ccw++;
2285 fmt_buffer++;
2286 }
2287
2288 cqr->startdev = startdev;
2289 cqr->memdev = startdev;
2290 cqr->basedev = base;
2291 cqr->retries = DASD_RETRIES;
2292 cqr->expires = startdev->default_expires * HZ;
2293 cqr->buildclk = get_tod_clock();
2294 cqr->status = DASD_CQR_FILLED;
2295 /* Set flags to suppress output for expected errors */
2296 set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags);
2297
2298 return cqr;
2299}
2300
1da177e4 2301static struct dasd_ccw_req *
d42e1712 2302dasd_eckd_build_format(struct dasd_device *base,
29b8dd9d 2303 struct format_data_t *fdata,
a94fa154 2304 int enable_pav)
1da177e4 2305{
d42e1712
SH		 2306 struct dasd_eckd_private *base_priv;
2307 struct dasd_eckd_private *start_priv;
29b8dd9d 2308 struct dasd_device *startdev = NULL;
1da177e4
LT		 2309 struct dasd_ccw_req *fcp;
2310 struct eckd_count *ect;
d42e1712 2311 struct ch_t address;
1da177e4
LT		 2312 struct ccw1 *ccw;
2313 void *data;
b44b0ab3 2314 int rpt;
1da177e4 2315 int cplength, datasize;
d42e1712 2316 int i, j;
f9a28f7b
JBJ		 2317 int intensity = 0;
2318 int r0_perm;
d42e1712 2319 int nr_tracks;
18d6624e 2320 int use_prefix;
1da177e4 2321
a94fa154 2322 if (enable_pav)
29b8dd9d
SH		 2323 startdev = dasd_alias_get_start_dev(base);
2324
d42e1712
SH		 2325 if (!startdev)
2326 startdev = base;
1da177e4 2327
543691a4
SO		 2328 start_priv = startdev->private;
2329 base_priv = base->private;
d42e1712
SH		 2330
2331 rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize);
2332
2333 nr_tracks = fdata->stop_unit - fdata->start_unit + 1;
1da177e4
LT		 2334
2335 /*
2336 * fdata->intensity is a bit string that tells us what to do:
2337 * Bit 0: write record zero
2338 * Bit 1: write home address, currently not supported
2339 * Bit 2: invalidate tracks
2340 * Bit 3: use OS/390 compatible disk layout (cdl)
f9a28f7b 2341 * Bit 4: do not allow storage subsystem to modify record zero
1da177e4
LT		 2342 * Only some bit combinations do make sense.
2343 */
f9a28f7b
JBJ		 2344 if (fdata->intensity & 0x10) {
2345 r0_perm = 0;
2346 intensity = fdata->intensity & ~0x10;
2347 } else {
2348 r0_perm = 1;
2349 intensity = fdata->intensity;
2350 }
d42e1712 2351
18d6624e
SH		 2352 use_prefix = base_priv->features.feature[8] & 0x01;
2353
f9a28f7b 2354 switch (intensity) {
1da177e4
LT		 2355 case 0x00: /* Normal format */
2356 case 0x08: /* Normal format, use cdl. */
d42e1712 2357 cplength = 2 + (rpt*nr_tracks);
18d6624e
SH		 2358 if (use_prefix)
2359 datasize = sizeof(struct PFX_eckd_data) +
2360 sizeof(struct LO_eckd_data) +
2361 rpt * nr_tracks * sizeof(struct eckd_count);
2362 else
2363 datasize = sizeof(struct DE_eckd_data) +
2364 sizeof(struct LO_eckd_data) +
2365 rpt * nr_tracks * sizeof(struct eckd_count);
1da177e4
LT		 2366 break;
2367 case 0x01: /* Write record zero and format track. */
2368 case 0x09: /* Write record zero and format track, use cdl. */
d42e1712 2369 cplength = 2 + rpt * nr_tracks;
18d6624e
SH		 2370 if (use_prefix)
2371 datasize = sizeof(struct PFX_eckd_data) +
2372 sizeof(struct LO_eckd_data) +
2373 sizeof(struct eckd_count) +
2374 rpt * nr_tracks * sizeof(struct eckd_count);
2375 else
2376 datasize = sizeof(struct DE_eckd_data) +
2377 sizeof(struct LO_eckd_data) +
2378 sizeof(struct eckd_count) +
2379 rpt * nr_tracks * sizeof(struct eckd_count);
1da177e4
LT		 2380 break;
2381 case 0x04: /* Invalidate track. */
2382 case 0x0c: /* Invalidate track, use cdl. */
2383 cplength = 3;
18d6624e
SH		 2384 if (use_prefix)
2385 datasize = sizeof(struct PFX_eckd_data) +
2386 sizeof(struct LO_eckd_data) +
2387 sizeof(struct eckd_count);
2388 else
2389 datasize = sizeof(struct DE_eckd_data) +
2390 sizeof(struct LO_eckd_data) +
2391 sizeof(struct eckd_count);
1da177e4
LT		 2392 break;
2393 default:
d42e1712
SH		 2394 dev_warn(&startdev->cdev->dev,
2395 "An I/O control call used incorrect flags 0x%x\n",
2396 fdata->intensity);
1da177e4
LT		 2397 return ERR_PTR(-EINVAL);
2398 }
2399 /* Allocate the format ccw request. */
d42e1712
SH		 2400 fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength,
2401 datasize, startdev);
1da177e4
LT		 2402 if (IS_ERR(fcp))
2403 return fcp;
2404
d42e1712 2405 start_priv->count++;
1da177e4
LT		 2406 data = fcp->data;
2407 ccw = fcp->cpaddr;
2408
f9a28f7b 2409 switch (intensity & ~0x08) {
1da177e4 2410 case 0x00: /* Normal format. */
18d6624e
SH		 2411 if (use_prefix) {
2412 prefix(ccw++, (struct PFX_eckd_data *) data,
2413 fdata->start_unit, fdata->stop_unit,
2414 DASD_ECKD_CCW_WRITE_CKD, base, startdev);
2415 /* grant subsystem permission to format R0 */
2416 if (r0_perm)
2417 ((struct PFX_eckd_data *)data)
2418 ->define_extent.ga_extended |= 0x04;
2419 data += sizeof(struct PFX_eckd_data);
2420 } else {
2421 define_extent(ccw++, (struct DE_eckd_data *) data,
2422 fdata->start_unit, fdata->stop_unit,
2423 DASD_ECKD_CCW_WRITE_CKD, startdev);
2424 /* grant subsystem permission to format R0 */
2425 if (r0_perm)
2426 ((struct DE_eckd_data *) data)
2427 ->ga_extended |= 0x04;
2428 data += sizeof(struct DE_eckd_data);
2429 }
1da177e4
LT		 2430 ccw[-1].flags |= CCW_FLAG_CC;
2431 locate_record(ccw++, (struct LO_eckd_data *) data,
d42e1712
SH		 2432 fdata->start_unit, 0, rpt*nr_tracks,
2433 DASD_ECKD_CCW_WRITE_CKD, base,
1da177e4
LT		 2434 fdata->blksize);
2435 data += sizeof(struct LO_eckd_data);
2436 break;
2437 case 0x01: /* Write record zero + format track. */
18d6624e
SH		 2438 if (use_prefix) {
2439 prefix(ccw++, (struct PFX_eckd_data *) data,
2440 fdata->start_unit, fdata->stop_unit,
2441 DASD_ECKD_CCW_WRITE_RECORD_ZERO,
2442 base, startdev);
2443 data += sizeof(struct PFX_eckd_data);
2444 } else {
2445 define_extent(ccw++, (struct DE_eckd_data *) data,
2446 fdata->start_unit, fdata->stop_unit,
2447 DASD_ECKD_CCW_WRITE_RECORD_ZERO, startdev);
2448 data += sizeof(struct DE_eckd_data);
2449 }
1da177e4
LT		 2450 ccw[-1].flags |= CCW_FLAG_CC;
2451 locate_record(ccw++, (struct LO_eckd_data *) data,
d42e1712
SH		 2452 fdata->start_unit, 0, rpt * nr_tracks + 1,
2453 DASD_ECKD_CCW_WRITE_RECORD_ZERO, base,
2454 base->block->bp_block);
1da177e4
LT		 2455 data += sizeof(struct LO_eckd_data);
2456 break;
2457 case 0x04: /* Invalidate track. */
18d6624e
SH		 2458 if (use_prefix) {
2459 prefix(ccw++, (struct PFX_eckd_data *) data,
2460 fdata->start_unit, fdata->stop_unit,
2461 DASD_ECKD_CCW_WRITE_CKD, base, startdev);
2462 data += sizeof(struct PFX_eckd_data);
2463 } else {
2464 define_extent(ccw++, (struct DE_eckd_data *) data,
2465 fdata->start_unit, fdata->stop_unit,
2466 DASD_ECKD_CCW_WRITE_CKD, startdev);
2467 data += sizeof(struct DE_eckd_data);
2468 }
1da177e4
LT		 2469 ccw[-1].flags |= CCW_FLAG_CC;
2470 locate_record(ccw++, (struct LO_eckd_data *) data,
2471 fdata->start_unit, 0, 1,
d42e1712 2472 DASD_ECKD_CCW_WRITE_CKD, base, 8);
1da177e4
LT		 2473 data += sizeof(struct LO_eckd_data);
2474 break;
2475 }
d42e1712
SH		 2476
2477 for (j = 0; j < nr_tracks; j++) {
2478 /* calculate cylinder and head for the current track */
2479 set_ch_t(&address,
2480 (fdata->start_unit + j) /
2481 base_priv->rdc_data.trk_per_cyl,
2482 (fdata->start_unit + j) %
2483 base_priv->rdc_data.trk_per_cyl);
2484 if (intensity & 0x01) { /* write record zero */
1da177e4
LT		 2485 ect = (struct eckd_count *) data;
2486 data += sizeof(struct eckd_count);
b44b0ab3
SW		 2487 ect->cyl = address.cyl;
2488 ect->head = address.head;
d42e1712 2489 ect->record = 0;
1da177e4 2490 ect->kl = 0;
d42e1712 2491 ect->dl = 8;
1da177e4 2492 ccw[-1].flags |= CCW_FLAG_CC;
d42e1712 2493 ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO;
1da177e4
LT		 2494 ccw->flags = CCW_FLAG_SLI;
2495 ccw->count = 8;
2496 ccw->cda = (__u32)(addr_t) ect;
2497 ccw++;
2498 }
d42e1712
SH		 2499 if ((intensity & ~0x08) & 0x04) { /* erase track */
2500 ect = (struct eckd_count *) data;
2501 data += sizeof(struct eckd_count);
2502 ect->cyl = address.cyl;
2503 ect->head = address.head;
2504 ect->record = 1;
2505 ect->kl = 0;
2506 ect->dl = 0;
2507 ccw[-1].flags |= CCW_FLAG_CC;
2508 ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD;
2509 ccw->flags = CCW_FLAG_SLI;
2510 ccw->count = 8;
2511 ccw->cda = (__u32)(addr_t) ect;
2512 } else { /* write remaining records */
2513 for (i = 0; i < rpt; i++) {
2514 ect = (struct eckd_count *) data;
2515 data += sizeof(struct eckd_count);
2516 ect->cyl = address.cyl;
2517 ect->head = address.head;
2518 ect->record = i + 1;
2519 ect->kl = 0;
2520 ect->dl = fdata->blksize;
2521 /*
2522 * Check for special tracks 0-1
2523 * when formatting CDL
2524 */
2525 if ((intensity & 0x08) &&
46d1c03c 2526 address.cyl == 0 && address.head == 0) {
d42e1712
SH		 2527 if (i < 3) {
2528 ect->kl = 4;
2529 ect->dl = sizes_trk0[i] - 4;
2530 }
2531 }
2532 if ((intensity & 0x08) &&
46d1c03c 2533 address.cyl == 0 && address.head == 1) {
d42e1712
SH		 2534 ect->kl = 44;
2535 ect->dl = LABEL_SIZE - 44;
2536 }
2537 ccw[-1].flags |= CCW_FLAG_CC;
2538 if (i != 0 || j == 0)
2539 ccw->cmd_code =
2540 DASD_ECKD_CCW_WRITE_CKD;
2541 else
2542 ccw->cmd_code =
2543 DASD_ECKD_CCW_WRITE_CKD_MT;
2544 ccw->flags = CCW_FLAG_SLI;
2545 ccw->count = 8;
2546 ccw->cda = (__u32)(addr_t) ect;
2547 ccw++;
2548 }
2549 }
1da177e4 2550 }
d42e1712
SH		 2551
2552 fcp->startdev = startdev;
2553 fcp->memdev = startdev;
29b8dd9d 2554 fcp->basedev = base;
eb6e199b 2555 fcp->retries = 256;
d42e1712 2556 fcp->expires = startdev->default_expires * HZ;
1aae0560 2557 fcp->buildclk = get_tod_clock();
1da177e4 2558 fcp->status = DASD_CQR_FILLED;
d42e1712 2559
1da177e4
LT		 2560 return fcp;
2561}
2562
570d237c
JH		 2563/*
2564 * Wrapper function to build a CCW request depending on input data
2565 */
2566static struct dasd_ccw_req *
2567dasd_eckd_format_build_ccw_req(struct dasd_device *base,
8fd57520
JH		 2568 struct format_data_t *fdata, int enable_pav,
2569 int tpm, struct eckd_count *fmt_buffer, int rpt)
570d237c 2570{
8fd57520
JH		 2571 struct dasd_ccw_req *ccw_req;
2572
2573 if (!fmt_buffer) {
2574 ccw_req = dasd_eckd_build_format(base, fdata, enable_pav);
2575 } else {
2576 if (tpm)
2577 ccw_req = dasd_eckd_build_check_tcw(base, fdata,
2578 enable_pav,
2579 fmt_buffer, rpt);
2580 else
2581 ccw_req = dasd_eckd_build_check(base, fdata, enable_pav,
2582 fmt_buffer, rpt);
2583 }
2584
2585 return ccw_req;
570d237c
JH		 2586}
2587
2588/*
2589 * Sanity checks on format_data
2590 */
2591static int dasd_eckd_format_sanity_checks(struct dasd_device *base,
2592 struct format_data_t *fdata)
d42e1712 2593{
543691a4 2594 struct dasd_eckd_private *private = base->private;
d42e1712 2595
d42e1712
SH		 2596 if (fdata->start_unit >=
2597 (private->real_cyl * private->rdc_data.trk_per_cyl)) {
2598 dev_warn(&base->cdev->dev,
2599 "Start track number %u used in formatting is too big\n",
2600 fdata->start_unit);
2601 return -EINVAL;
2602 }
2603 if (fdata->stop_unit >=
2604 (private->real_cyl * private->rdc_data.trk_per_cyl)) {
2605 dev_warn(&base->cdev->dev,
2606 "Stop track number %u used in formatting is too big\n",
2607 fdata->stop_unit);
2608 return -EINVAL;
2609 }
2610 if (fdata->start_unit > fdata->stop_unit) {
2611 dev_warn(&base->cdev->dev,
2612 "Start track %u used in formatting exceeds end track\n",
2613 fdata->start_unit);
2614 return -EINVAL;
2615 }
2616 if (dasd_check_blocksize(fdata->blksize) != 0) {
2617 dev_warn(&base->cdev->dev,
2618 "The DASD cannot be formatted with block size %u\n",
2619 fdata->blksize);
2620 return -EINVAL;
2621 }
570d237c
JH		 2622 return 0;
2623}
2624
2625/*
2626 * This function will process format_data originally coming from an IOCTL
2627 */
2628static int dasd_eckd_format_process_data(struct dasd_device *base,
2629 struct format_data_t *fdata,
8fd57520
JH		 2630 int enable_pav, int tpm,
2631 struct eckd_count *fmt_buffer, int rpt,
2632 struct irb *irb)
570d237c 2633{
543691a4 2634 struct dasd_eckd_private *private = base->private;
570d237c 2635 struct dasd_ccw_req *cqr, *n;
570d237c
JH		 2636 struct list_head format_queue;
2637 struct dasd_device *device;
8fd57520 2638 char *sense = NULL;
570d237c
JH		 2639 int old_start, old_stop, format_step;
2640 int step, retry;
2641 int rc;
2642
570d237c
JH		 2643 rc = dasd_eckd_format_sanity_checks(base, fdata);
2644 if (rc)
2645 return rc;
d42e1712
SH		 2646
2647 INIT_LIST_HEAD(&format_queue);
d42e1712 2648
46d1c03c 2649 old_start = fdata->start_unit;
29b8dd9d 2650 old_stop = fdata->stop_unit;
d42e1712 2651
8fd57520
JH		 2652 if (!tpm && fmt_buffer != NULL) {
2653 /* Command Mode / Format Check */
2654 format_step = 1;
2655 } else if (tpm && fmt_buffer != NULL) {
2656 /* Transport Mode / Format Check */
2657 format_step = DASD_CQR_MAX_CCW / rpt;
2658 } else {
2659 /* Normal Formatting */
2660 format_step = DASD_CQR_MAX_CCW /
2661 recs_per_track(&private->rdc_data, 0, fdata->blksize);
2662 }
2663
46d1c03c
JH		 2664 do {
2665 retry = 0;
2666 while (fdata->start_unit <= old_stop) {
2667 step = fdata->stop_unit - fdata->start_unit + 1;
2668 if (step > format_step) {
2669 fdata->stop_unit =
2670 fdata->start_unit + format_step - 1;
2671 }
d42e1712 2672
570d237c 2673 cqr = dasd_eckd_format_build_ccw_req(base, fdata,
8fd57520
JH		 2674 enable_pav, tpm,
2675 fmt_buffer, rpt);
46d1c03c
JH		 2676 if (IS_ERR(cqr)) {
2677 rc = PTR_ERR(cqr);
2678 if (rc == -ENOMEM) {
2679 if (list_empty(&format_queue))
2680 goto out;
2681 /*
2682 * not enough memory available, start
2683 * requests retry after first requests
2684 * were finished
2685 */
2686 retry = 1;
2687 break;
2688 }
2689 goto out_err;
2690 }
2691 list_add_tail(&cqr->blocklist, &format_queue);
d42e1712 2692
8fd57520
JH		 2693 if (fmt_buffer) {
2694 step = fdata->stop_unit - fdata->start_unit + 1;
2695 fmt_buffer += rpt * step;
2696 }
46d1c03c
JH		 2697 fdata->start_unit = fdata->stop_unit + 1;
2698 fdata->stop_unit = old_stop;
d42e1712 2699 }
d42e1712 2700
46d1c03c
JH		 2701 rc = dasd_sleep_on_queue(&format_queue);
2702
2703out_err:
2704 list_for_each_entry_safe(cqr, n, &format_queue, blocklist) {
2705 device = cqr->startdev;
543691a4 2706 private = device->private;
8fd57520
JH		 2707
2708 if (cqr->status == DASD_CQR_FAILED) {
2709 /*
2710 * Only get sense data if called by format
2711 * check
2712 */
2713 if (fmt_buffer && irb) {
2714 sense = dasd_get_sense(&cqr->irb);
2715 memcpy(irb, &cqr->irb, sizeof(*irb));
2716 }
46d1c03c 2717 rc = -EIO;
8fd57520 2718 }
46d1c03c
JH		 2719 list_del_init(&cqr->blocklist);
2720 dasd_sfree_request(cqr, device);
2721 private->count--;
2722 }
d42e1712 2723
8fd57520 2724 if (rc && rc != -EIO)
46d1c03c 2725 goto out;
8fd57520
JH		 2726 if (rc == -EIO) {
2727 /*
2728 * In case fewer than the expected records are on the
2729 * track, we will most likely get a 'No Record Found'
2730 * error (in command mode) or a 'File Protected' error
2731 * (in transport mode). Those particular cases shouldn't
2732 * pass the -EIO to the IOCTL, therefore reset the rc
2733 * and continue.
2734 */
2735 if (sense &&
2736 (sense[1] & SNS1_NO_REC_FOUND ||
2737 sense[1] & SNS1_FILE_PROTECTED))
2738 retry = 1;
2739 else
2740 goto out;
2741 }
d42e1712 2742
46d1c03c 2743 } while (retry);
29b8dd9d 2744
46d1c03c
JH		 2745out:
2746 fdata->start_unit = old_start;
2747 fdata->stop_unit = old_stop;
d42e1712
SH		 2748
2749 return rc;
2750}
2751
570d237c
JH		 2752static int dasd_eckd_format_device(struct dasd_device *base,
2753 struct format_data_t *fdata, int enable_pav)
2754{
8fd57520
JH		 2755 return dasd_eckd_format_process_data(base, fdata, enable_pav, 0, NULL,
2756 0, NULL);
2757}
2758
2759/*
2760 * Helper function to count consecutive records of a single track.
2761 */
2762static int dasd_eckd_count_records(struct eckd_count *fmt_buffer, int start,
2763 int max)
2764{
2765 int head;
2766 int i;
2767
2768 head = fmt_buffer[start].head;
2769
2770 /*
2771 * There are 3 conditions where we stop counting:
2772 * - if data reoccurs (same head and record may reoccur), which may
2773 * happen due to the way DASD_ECKD_CCW_READ_COUNT works
2774 * - when the head changes, because we're iterating over several tracks
2775 * then (DASD_ECKD_CCW_READ_COUNT_MT)
2776 * - when we've reached the end of sensible data in the buffer (the
2777 * record will be 0 then)
2778 */
2779 for (i = start; i < max; i++) {
2780 if (i > start) {
2781 if ((fmt_buffer[i].head == head &&
2782 fmt_buffer[i].record == 1) ||
2783 fmt_buffer[i].head != head ||
2784 fmt_buffer[i].record == 0)
2785 break;
2786 }
2787 }
2788
2789 return i - start;
2790}
2791
2792/*
2793 * Evaluate a given range of tracks. Data like number of records, blocksize,
2794 * record ids, and key length are compared with expected data.
2795 *
2796 * If a mismatch occurs, the corresponding error bit is set, as well as
2797 * additional information, depending on the error.
2798 */
2799static void dasd_eckd_format_evaluate_tracks(struct eckd_count *fmt_buffer,
2800 struct format_check_t *cdata,
2801 int rpt_max, int rpt_exp,
2802 int trk_per_cyl, int tpm)
2803{
2804 struct ch_t geo;
2805 int max_entries;
2806 int count = 0;
2807 int trkcount;
2808 int blksize;
2809 int pos = 0;
2810 int i, j;
2811 int kl;
2812
2813 trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1;
2814 max_entries = trkcount * rpt_max;
2815
2816 for (i = cdata->expect.start_unit; i <= cdata->expect.stop_unit; i++) {
2817 /* Calculate the correct next starting position in the buffer */
2818 if (tpm) {
2819 while (fmt_buffer[pos].record == 0 &&
2820 fmt_buffer[pos].dl == 0) {
2821 if (pos++ > max_entries)
2822 break;
2823 }
2824 } else {
2825 if (i != cdata->expect.start_unit)
2826 pos += rpt_max - count;
2827 }
2828
2829 /* Calculate the expected geo values for the current track */
2830 set_ch_t(&geo, i / trk_per_cyl, i % trk_per_cyl);
2831
2832 /* Count and check number of records */
2833 count = dasd_eckd_count_records(fmt_buffer, pos, pos + rpt_max);
2834
2835 if (count < rpt_exp) {
2836 cdata->result = DASD_FMT_ERR_TOO_FEW_RECORDS;
2837 break;
2838 }
2839 if (count > rpt_exp) {
2840 cdata->result = DASD_FMT_ERR_TOO_MANY_RECORDS;
2841 break;
2842 }
2843
2844 for (j = 0; j < count; j++, pos++) {
2845 blksize = cdata->expect.blksize;
2846 kl = 0;
2847
2848 /*
2849 * Set special values when checking CDL formatted
2850 * devices.
2851 */
2852 if ((cdata->expect.intensity & 0x08) &&
2853 geo.cyl == 0 && geo.head == 0) {
2854 if (j < 3) {
2855 blksize = sizes_trk0[j] - 4;
2856 kl = 4;
2857 }
2858 }
2859 if ((cdata->expect.intensity & 0x08) &&
2860 geo.cyl == 0 && geo.head == 1) {
2861 blksize = LABEL_SIZE - 44;
2862 kl = 44;
2863 }
2864
2865 /* Check blocksize */
2866 if (fmt_buffer[pos].dl != blksize) {
2867 cdata->result = DASD_FMT_ERR_BLKSIZE;
2868 goto out;
2869 }
2870 /* Check if key length is 0 */
2871 if (fmt_buffer[pos].kl != kl) {
2872 cdata->result = DASD_FMT_ERR_KEY_LENGTH;
2873 goto out;
2874 }
2875 /* Check if record_id is correct */
2876 if (fmt_buffer[pos].cyl != geo.cyl ||
2877 fmt_buffer[pos].head != geo.head ||
2878 fmt_buffer[pos].record != (j + 1)) {
2879 cdata->result = DASD_FMT_ERR_RECORD_ID;
2880 goto out;
2881 }
2882 }
2883 }
2884
2885out:
2886 /*
2887 * In case of no errors, we need to decrease by one
2888 * to get the correct positions.
2889 */
2890 if (!cdata->result) {
2891 i--;
2892 pos--;
2893 }
2894
2895 cdata->unit = i;
2896 cdata->num_records = count;
2897 cdata->rec = fmt_buffer[pos].record;
2898 cdata->blksize = fmt_buffer[pos].dl;
2899 cdata->key_length = fmt_buffer[pos].kl;
2900}
2901
2902/*
2903 * Check the format of a range of tracks of a DASD.
2904 */
2905static int dasd_eckd_check_device_format(struct dasd_device *base,
2906 struct format_check_t *cdata,
2907 int enable_pav)
2908{
2909 struct dasd_eckd_private *private = base->private;
2910 struct eckd_count *fmt_buffer;
2911 struct irb irb;
2912 int rpt_max, rpt_exp;
2913 int fmt_buffer_size;
2914 int trk_per_cyl;
2915 int trkcount;
2916 int tpm = 0;
2917 int rc;
2918
2919 trk_per_cyl = private->rdc_data.trk_per_cyl;
2920
2921 /* Get maximum and expected amount of records per track */
2922 rpt_max = recs_per_track(&private->rdc_data, 0, 512) + 1;
2923 rpt_exp = recs_per_track(&private->rdc_data, 0, cdata->expect.blksize);
2924
2925 trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1;
2926 fmt_buffer_size = trkcount * rpt_max * sizeof(struct eckd_count);
2927
2928 fmt_buffer = kzalloc(fmt_buffer_size, GFP_KERNEL | GFP_DMA);
2929 if (!fmt_buffer)
2930 return -ENOMEM;
2931
2932 /*
2933 * A certain FICON feature subset is needed to operate in transport
2934 * mode. Additionally, the support for transport mode is implicitly
2935 * checked by comparing the buffer size with fcx_max_data. As long as
2936 * the buffer size is smaller we can operate in transport mode and
2937 * process multiple tracks. If not, only one track at once is being
2938 * processed using command mode.
2939 */
2940 if ((private->features.feature[40] & 0x04) &&
2941 fmt_buffer_size <= private->fcx_max_data)
2942 tpm = 1;
2943
2944 rc = dasd_eckd_format_process_data(base, &cdata->expect, enable_pav,
2945 tpm, fmt_buffer, rpt_max, &irb);
2946 if (rc && rc != -EIO)
2947 goto out;
2948 if (rc == -EIO) {
2949 /*
2950 * If our first attempt with transport mode enabled comes back
2951 * with an incorrect length error, we're going to retry the
2952 * check with command mode.
2953 */
2954 if (tpm && scsw_cstat(&irb.scsw) == 0x40) {
2955 tpm = 0;
2956 rc = dasd_eckd_format_process_data(base, &cdata->expect,
2957 enable_pav, tpm,
2958 fmt_buffer, rpt_max,
2959 &irb);
2960 if (rc)
2961 goto out;
2962 } else {
2963 goto out;
2964 }
2965 }
2966
2967 dasd_eckd_format_evaluate_tracks(fmt_buffer, cdata, rpt_max, rpt_exp,
2968 trk_per_cyl, tpm);
2969
2970out:
2971 kfree(fmt_buffer);
2972
2973 return rc;
570d237c
JH		 2974}
2975
8e09f215 2976static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr)
1da177e4 2977{
a2ace466
HR		 2978 if (cqr->retries < 0) {
2979 cqr->status = DASD_CQR_FAILED;
2980 return;
2981 }
8e09f215
SW		 2982 cqr->status = DASD_CQR_FILLED;
2983 if (cqr->block && (cqr->startdev != cqr->block->base)) {
2984 dasd_eckd_reset_ccw_to_base_io(cqr);
2985 cqr->startdev = cqr->block->base;
c9346151 2986 cqr->lpm = dasd_path_get_opm(cqr->block->base);
1da177e4 2987 }
8e09f215 2988};
1da177e4
LT		 2989
2990static dasd_erp_fn_t
2991dasd_eckd_erp_action(struct dasd_ccw_req * cqr)
2992{
8e09f215 2993 struct dasd_device *device = (struct dasd_device *) cqr->startdev;
1da177e4
LT		 2994 struct ccw_device *cdev = device->cdev;
2995
2996 switch (cdev->id.cu_type) {
2997 case 0x3990:
2998 case 0x2105:
2999 case 0x2107:
3000 case 0x1750:
3001 return dasd_3990_erp_action;
3002 case 0x9343:
3003 case 0x3880:
3004 default:
3005 return dasd_default_erp_action;
3006 }
3007}
3008
3009static dasd_erp_fn_t
3010dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr)
3011{
3012 return dasd_default_erp_postaction;
3013}
3014
5a27e60d
SW		 3015static void dasd_eckd_check_for_device_change(struct dasd_device *device,
3016 struct dasd_ccw_req *cqr,
3017 struct irb *irb)
8e09f215
SW		 3018{
3019 char mask;
f3eb5384 3020 char *sense = NULL;
543691a4 3021 struct dasd_eckd_private *private = device->private;
8e09f215
SW		 3022
3023 /* first of all check for state change pending interrupt */
3024 mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP;
f3eb5384 3025 if ((scsw_dstat(&irb->scsw) & mask) == mask) {
c8d1c0ff
SH		 3026 /*
3027 * for alias only, not in offline processing
3028 * and only if not suspended
3029 */
501183f2 3030 if (!device->block && private->lcu &&
25e2cf1c 3031 device->state == DASD_STATE_ONLINE &&
c8d1c0ff
SH		 3032 !test_bit(DASD_FLAG_OFFLINE, &device->flags) &&
3033 !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) {
501183f2
SH		 3034 /* schedule worker to reload device */
3035 dasd_reload_device(device);
3036 }
8e09f215
SW		 3037 dasd_generic_handle_state_change(device);
3038 return;
3039 }
3040
a5a0061f 3041 sense = dasd_get_sense(irb);
5a27e60d
SW		 3042 if (!sense)
3043 return;
3044
3045 /* summary unit check */
c7a29e56 3046 if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) &&
a5a0061f 3047 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) {
59a9ed5f
SH		 3048 if (test_and_set_bit(DASD_FLAG_SUC, &device->flags)) {
3049 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
3050 "eckd suc: device already notified");
3051 return;
3052 }
3053 sense = dasd_get_sense(irb);
3054 if (!sense) {
3055 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
3056 "eckd suc: no reason code available");
3057 clear_bit(DASD_FLAG_SUC, &device->flags);
3058 return;
3059
3060 }
3061 private->suc_reason = sense[8];
3062 DBF_DEV_EVENT(DBF_NOTICE, device, "%s %x",
3063 "eckd handle summary unit check: reason",
3064 private->suc_reason);
3065 dasd_get_device(device);
3066 if (!schedule_work(&device->suc_work))
3067 dasd_put_device(device);
3068
8e09f215
SW		 3069 return;
3070 }
3071
f60c768c 3072 /* service information message SIM */
5a27e60d 3073 if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) &&
f3eb5384
SW		 3074 ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) {
3075 dasd_3990_erp_handle_sim(device, sense);
f60c768c
SH		 3076 return;
3077 }
3078
5a27e60d
SW		 3079 /* loss of device reservation is handled via base devices only
3080 * as alias devices may be used with several bases
3081 */
c7a29e56
SW		 3082 if (device->block && (sense[27] & DASD_SENSE_BIT_0) &&
3083 (sense[7] == 0x3F) &&
5a27e60d
SW		 3084 (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) &&
3085 test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) {
3086 if (device->features & DASD_FEATURE_FAILONSLCK)
3087 set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags);
3088 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags);
3089 dev_err(&device->cdev->dev,
3090 "The device reservation was lost\n");
ada3df91 3091 }
5a27e60d 3092}
f3eb5384
SW		 3093
3094static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single(
3095 struct dasd_device *startdev,
8e09f215 3096 struct dasd_block *block,
f3eb5384
SW		 3097 struct request *req,
3098 sector_t first_rec,
3099 sector_t last_rec,
3100 sector_t first_trk,
3101 sector_t last_trk,
3102 unsigned int first_offs,
3103 unsigned int last_offs,
3104 unsigned int blk_per_trk,
3105 unsigned int blksize)
1da177e4
LT		 3106{
3107 struct dasd_eckd_private *private;
3108 unsigned long *idaws;
3109 struct LO_eckd_data *LO_data;
3110 struct dasd_ccw_req *cqr;
3111 struct ccw1 *ccw;
5705f702 3112 struct req_iterator iter;
7988613b 3113 struct bio_vec bv;
1da177e4 3114 char *dst;
f3eb5384 3115 unsigned int off;
1da177e4 3116 int count, cidaw, cplength, datasize;
f3eb5384 3117 sector_t recid;
1da177e4 3118 unsigned char cmd, rcmd;
8e09f215
SW		 3119 int use_prefix;
3120 struct dasd_device *basedev;
1da177e4 3121
8e09f215 3122 basedev = block->base;
543691a4 3123 private = basedev->private;
1da177e4
LT		 3124 if (rq_data_dir(req) == READ)
3125 cmd = DASD_ECKD_CCW_READ_MT;
3126 else if (rq_data_dir(req) == WRITE)
3127 cmd = DASD_ECKD_CCW_WRITE_MT;
3128 else
3129 return ERR_PTR(-EINVAL);
f3eb5384 3130
1da177e4
LT		 3131 /* Check struct bio and count the number of blocks for the request. */
3132 count = 0;
3133 cidaw = 0;
5705f702 3134 rq_for_each_segment(bv, req, iter) {
7988613b 3135 if (bv.bv_len & (blksize - 1))
6c92e699
JA		 3136 /* Eckd can only do full blocks. */
3137 return ERR_PTR(-EINVAL);
7988613b 3138 count += bv.bv_len >> (block->s2b_shift + 9);
7988613b
KO		 3139 if (idal_is_needed (page_address(bv.bv_page), bv.bv_len))
3140 cidaw += bv.bv_len >> (block->s2b_shift + 9);
1da177e4
LT		 3141 }
3142 /* Paranoia. */
3143 if (count != last_rec - first_rec + 1)
3144 return ERR_PTR(-EINVAL);
8e09f215
SW		 3145
3146 /* use the prefix command if available */
3147 use_prefix = private->features.feature[8] & 0x01;
3148 if (use_prefix) {
3149 /* 1x prefix + number of blocks */
3150 cplength = 2 + count;
3151 /* 1x prefix + cidaws*sizeof(long) */
3152 datasize = sizeof(struct PFX_eckd_data) +
3153 sizeof(struct LO_eckd_data) +
3154 cidaw * sizeof(unsigned long);
3155 } else {
3156 /* 1x define extent + 1x locate record + number of blocks */
3157 cplength = 2 + count;
3158 /* 1x define extent + 1x locate record + cidaws*sizeof(long) */
3159 datasize = sizeof(struct DE_eckd_data) +
3160 sizeof(struct LO_eckd_data) +
3161 cidaw * sizeof(unsigned long);
3162 }
1da177e4
LT		 3163 /* Find out the number of additional locate record ccws for cdl. */
3164 if (private->uses_cdl && first_rec < 2*blk_per_trk) {
3165 if (last_rec >= 2*blk_per_trk)
3166 count = 2*blk_per_trk - first_rec;
3167 cplength += count;
3168 datasize += count*sizeof(struct LO_eckd_data);
3169 }
3170 /* Allocate the ccw request. */
68b781fe
SH		 3171 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
3172 startdev);
1da177e4
LT		 3173 if (IS_ERR(cqr))
3174 return cqr;
3175 ccw = cqr->cpaddr;
8e09f215
SW		 3176 /* First ccw is define extent or prefix. */
3177 if (use_prefix) {
3178 if (prefix(ccw++, cqr->data, first_trk,
3179 last_trk, cmd, basedev, startdev) == -EAGAIN) {
3180 /* Clock not in sync and XRC is enabled.
3181 * Try again later.
3182 */
3183 dasd_sfree_request(cqr, startdev);
3184 return ERR_PTR(-EAGAIN);
3185 }
3186 idaws = (unsigned long *) (cqr->data +
3187 sizeof(struct PFX_eckd_data));
3188 } else {
3189 if (define_extent(ccw++, cqr->data, first_trk,
b38f27e8 3190 last_trk, cmd, basedev) == -EAGAIN) {
8e09f215
SW		 3191 /* Clock not in sync and XRC is enabled.
3192 * Try again later.
3193 */
3194 dasd_sfree_request(cqr, startdev);
3195 return ERR_PTR(-EAGAIN);
3196 }
3197 idaws = (unsigned long *) (cqr->data +
3198 sizeof(struct DE_eckd_data));
d54853ef 3199 }
1da177e4 3200 /* Build locate_record+read/write/ccws. */
1da177e4
LT		 3201 LO_data = (struct LO_eckd_data *) (idaws + cidaw);
3202 recid = first_rec;
3203 if (private->uses_cdl == 0 || recid > 2*blk_per_trk) {
3204 /* Only standard blocks so there is just one locate record. */
3205 ccw[-1].flags |= CCW_FLAG_CC;
3206 locate_record(ccw++, LO_data++, first_trk, first_offs + 1,
8e09f215 3207 last_rec - recid + 1, cmd, basedev, blksize);
1da177e4 3208 }
5705f702 3209 rq_for_each_segment(bv, req, iter) {
7988613b 3210 dst = page_address(bv.bv_page) + bv.bv_offset;
1da177e4
LT		 3211 if (dasd_page_cache) {
3212 char *copy = kmem_cache_alloc(dasd_page_cache,
441e143e 3213 GFP_DMA | __GFP_NOWARN);
1da177e4 3214 if (copy && rq_data_dir(req) == WRITE)
7988613b 3215 memcpy(copy + bv.bv_offset, dst, bv.bv_len);
1da177e4 3216 if (copy)
7988613b 3217 dst = copy + bv.bv_offset;
1da177e4 3218 }
7988613b 3219 for (off = 0; off < bv.bv_len; off += blksize) {
1da177e4
LT		 3220 sector_t trkid = recid;
3221 unsigned int recoffs = sector_div(trkid, blk_per_trk);
3222 rcmd = cmd;
3223 count = blksize;
3224 /* Locate record for cdl special block ? */
3225 if (private->uses_cdl && recid < 2*blk_per_trk) {
3226 if (dasd_eckd_cdl_special(blk_per_trk, recid)){
3227 rcmd |= 0x8;
3228 count = dasd_eckd_cdl_reclen(recid);
ec5883ab
HH		 3229 if (count < blksize &&
3230 rq_data_dir(req) == READ)
1da177e4
LT		 3231 memset(dst + count, 0xe5,
3232 blksize - count);
3233 }
3234 ccw[-1].flags |= CCW_FLAG_CC;
3235 locate_record(ccw++, LO_data++,
3236 trkid, recoffs + 1,
8e09f215 3237 1, rcmd, basedev, count);
1da177e4
LT		 3238 }
3239 /* Locate record for standard blocks ? */
3240 if (private->uses_cdl && recid == 2*blk_per_trk) {
3241 ccw[-1].flags |= CCW_FLAG_CC;
3242 locate_record(ccw++, LO_data++,
3243 trkid, recoffs + 1,
3244 last_rec - recid + 1,
8e09f215 3245 cmd, basedev, count);
1da177e4
LT		 3246 }
3247 /* Read/write ccw. */
3248 ccw[-1].flags |= CCW_FLAG_CC;
3249 ccw->cmd_code = rcmd;
3250 ccw->count = count;
3251 if (idal_is_needed(dst, blksize)) {
3252 ccw->cda = (__u32)(addr_t) idaws;
3253 ccw->flags = CCW_FLAG_IDA;
3254 idaws = idal_create_words(idaws, dst, blksize);
3255 } else {
3256 ccw->cda = (__u32)(addr_t) dst;
3257 ccw->flags = 0;
3258 }
3259 ccw++;
3260 dst += blksize;
3261 recid++;
3262 }
3263 }
13de227b
HS		 3264 if (blk_noretry_request(req) ||
3265 block->base->features & DASD_FEATURE_FAILFAST)
1c01b8a5 3266 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
8e09f215
SW		 3267 cqr->startdev = startdev;
3268 cqr->memdev = startdev;
3269 cqr->block = block;
7c8faa86 3270 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
c9346151 3271 cqr->lpm = dasd_path_get_ppm(startdev);
1f1ee9ad 3272 cqr->retries = startdev->default_retries;
1aae0560 3273 cqr->buildclk = get_tod_clock();
1da177e4
LT		 3274 cqr->status = DASD_CQR_FILLED;
3275 return cqr;
3276}
3277
f3eb5384
SW		 3278static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track(
3279 struct dasd_device *startdev,
3280 struct dasd_block *block,
3281 struct request *req,
3282 sector_t first_rec,
3283 sector_t last_rec,
3284 sector_t first_trk,
3285 sector_t last_trk,
3286 unsigned int first_offs,
3287 unsigned int last_offs,
3288 unsigned int blk_per_trk,
3289 unsigned int blksize)
3290{
f3eb5384
SW		 3291 unsigned long *idaws;
3292 struct dasd_ccw_req *cqr;
3293 struct ccw1 *ccw;
3294 struct req_iterator iter;
7988613b 3295 struct bio_vec bv;
f3eb5384
SW		 3296 char *dst, *idaw_dst;
3297 unsigned int cidaw, cplength, datasize;
3298 unsigned int tlf;
3299 sector_t recid;
3300 unsigned char cmd;
3301 struct dasd_device *basedev;
3302 unsigned int trkcount, count, count_to_trk_end;
3303 unsigned int idaw_len, seg_len, part_len, len_to_track_end;
3304 unsigned char new_track, end_idaw;
3305 sector_t trkid;
3306 unsigned int recoffs;
3307
3308 basedev = block->base;
f3eb5384
SW		 3309 if (rq_data_dir(req) == READ)
3310 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
3311 else if (rq_data_dir(req) == WRITE)
3312 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
3313 else
3314 return ERR_PTR(-EINVAL);
3315
3316 /* Track based I/O needs IDAWs for each page, and not just for
3317 * 64 bit addresses. We need additional idals for pages
3318 * that get filled from two tracks, so we use the number
3319 * of records as upper limit.
3320 */
3321 cidaw = last_rec - first_rec + 1;
3322 trkcount = last_trk - first_trk + 1;
3323
3324 /* 1x prefix + one read/write ccw per track */
3325 cplength = 1 + trkcount;
3326
3327 /* on 31-bit we need space for two 32 bit addresses per page
3328 * on 64-bit one 64 bit address
3329 */
3330 datasize = sizeof(struct PFX_eckd_data) +
3331 cidaw * sizeof(unsigned long long);
3332
3333 /* Allocate the ccw request. */
68b781fe
SH		 3334 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
3335 startdev);
f3eb5384
SW		 3336 if (IS_ERR(cqr))
3337 return cqr;
3338 ccw = cqr->cpaddr;
3339 /* transfer length factor: how many bytes to read from the last track */
3340 if (first_trk == last_trk)
3341 tlf = last_offs - first_offs + 1;
3342 else
3343 tlf = last_offs + 1;
3344 tlf *= blksize;
3345
3346 if (prefix_LRE(ccw++, cqr->data, first_trk,
3347 last_trk, cmd, basedev, startdev,
3348 1 /* format */, first_offs + 1,
3349 trkcount, blksize,
3350 tlf) == -EAGAIN) {
3351 /* Clock not in sync and XRC is enabled.
3352 * Try again later.
3353 */
3354 dasd_sfree_request(cqr, startdev);
3355 return ERR_PTR(-EAGAIN);
3356 }
3357
3358 /*
3359 * The translation of request into ccw programs must meet the
3360 * following conditions:
3361 * - all idaws but the first and the last must address full pages
3362 * (or 2K blocks on 31-bit)
3363 * - the scope of a ccw and it's idal ends with the track boundaries
3364 */
3365 idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data));
3366 recid = first_rec;
3367 new_track = 1;
3368 end_idaw = 0;
3369 len_to_track_end = 0;
246ccea1 3370 idaw_dst = NULL;
f3eb5384
SW		 3371 idaw_len = 0;
3372 rq_for_each_segment(bv, req, iter) {
7988613b
KO		 3373 dst = page_address(bv.bv_page) + bv.bv_offset;
3374 seg_len = bv.bv_len;
f3eb5384
SW		 3375 while (seg_len) {
3376 if (new_track) {
3377 trkid = recid;
3378 recoffs = sector_div(trkid, blk_per_trk);
3379 count_to_trk_end = blk_per_trk - recoffs;
3380 count = min((last_rec - recid + 1),
3381 (sector_t)count_to_trk_end);
3382 len_to_track_end = count * blksize;
3383 ccw[-1].flags |= CCW_FLAG_CC;
3384 ccw->cmd_code = cmd;
3385 ccw->count = len_to_track_end;
3386 ccw->cda = (__u32)(addr_t)idaws;
3387 ccw->flags = CCW_FLAG_IDA;
3388 ccw++;
3389 recid += count;
3390 new_track = 0;
52db45c3
SW		 3391 /* first idaw for a ccw may start anywhere */
3392 if (!idaw_dst)
3393 idaw_dst = dst;
f3eb5384 3394 }
52db45c3
SW		 3395 /* If we start a new idaw, we must make sure that it
3396 * starts on an IDA_BLOCK_SIZE boundary.
f3eb5384
SW		 3397 * If we continue an idaw, we must make sure that the
3398 * current segment begins where the so far accumulated
3399 * idaw ends
3400 */
52db45c3
SW		 3401 if (!idaw_dst) {
3402 if (__pa(dst) & (IDA_BLOCK_SIZE-1)) {
3403 dasd_sfree_request(cqr, startdev);
3404 return ERR_PTR(-ERANGE);
3405 } else
3406 idaw_dst = dst;
3407 }
f3eb5384
SW		 3408 if ((idaw_dst + idaw_len) != dst) {
3409 dasd_sfree_request(cqr, startdev);
3410 return ERR_PTR(-ERANGE);
3411 }
3412 part_len = min(seg_len, len_to_track_end);
3413 seg_len -= part_len;
3414 dst += part_len;
3415 idaw_len += part_len;
3416 len_to_track_end -= part_len;
3417 /* collected memory area ends on an IDA_BLOCK border,
3418 * -> create an idaw
3419 * idal_create_words will handle cases where idaw_len
3420 * is larger then IDA_BLOCK_SIZE
3421 */
3422 if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1)))
3423 end_idaw = 1;
3424 /* We also need to end the idaw at track end */
3425 if (!len_to_track_end) {
3426 new_track = 1;
3427 end_idaw = 1;
3428 }
3429 if (end_idaw) {
3430 idaws = idal_create_words(idaws, idaw_dst,
3431 idaw_len);
246ccea1 3432 idaw_dst = NULL;
f3eb5384
SW		 3433 idaw_len = 0;
3434 end_idaw = 0;
3435 }
3436 }
3437 }
3438
3439 if (blk_noretry_request(req) ||
3440 block->base->features & DASD_FEATURE_FAILFAST)
3441 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
3442 cqr->startdev = startdev;
3443 cqr->memdev = startdev;
3444 cqr->block = block;
7c8faa86 3445 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
c9346151 3446 cqr->lpm = dasd_path_get_ppm(startdev);
1f1ee9ad 3447 cqr->retries = startdev->default_retries;
1aae0560 3448 cqr->buildclk = get_tod_clock();
f3eb5384
SW		 3449 cqr->status = DASD_CQR_FILLED;
3450 return cqr;
3451}
3452
3453static int prepare_itcw(struct itcw *itcw,
3454 unsigned int trk, unsigned int totrk, int cmd,
3455 struct dasd_device *basedev,
3456 struct dasd_device *startdev,
3457 unsigned int rec_on_trk, int count,
3458 unsigned int blksize,
3459 unsigned int total_data_size,
3460 unsigned int tlf,
3461 unsigned int blk_per_trk)
3462{
3463 struct PFX_eckd_data pfxdata;
3464 struct dasd_eckd_private *basepriv, *startpriv;
3465 struct DE_eckd_data *dedata;
3466 struct LRE_eckd_data *lredata;
3467 struct dcw *dcw;
3468
3469 u32 begcyl, endcyl;
3470 u16 heads, beghead, endhead;
3471 u8 pfx_cmd;
3472
3473 int rc = 0;
3474 int sector = 0;
3475 int dn, d;
3476
3477
3478 /* setup prefix data */
543691a4
SO		 3479 basepriv = basedev->private;
3480 startpriv = startdev->private;
f3eb5384
SW		 3481 dedata = &pfxdata.define_extent;
3482 lredata = &pfxdata.locate_record;
3483
3484 memset(&pfxdata, 0, sizeof(pfxdata));
3485 pfxdata.format = 1; /* PFX with LRE */
3486 pfxdata.base_address = basepriv->ned->unit_addr;
3487 pfxdata.base_lss = basepriv->ned->ID;
3488 pfxdata.validity.define_extent = 1;
3489
3490 /* private uid is kept up to date, conf_data may be outdated */
3491 if (startpriv->uid.type != UA_BASE_DEVICE) {
3492 pfxdata.validity.verify_base = 1;
3493 if (startpriv->uid.type == UA_HYPER_PAV_ALIAS)
3494 pfxdata.validity.hyper_pav = 1;
3495 }
3496
3497 switch (cmd) {
3498 case DASD_ECKD_CCW_READ_TRACK_DATA:
3499 dedata->mask.perm = 0x1;
3500 dedata->attributes.operation = basepriv->attrib.operation;
3501 dedata->blk_size = blksize;
3502 dedata->ga_extended |= 0x42;
3503 lredata->operation.orientation = 0x0;
3504 lredata->operation.operation = 0x0C;
3505 lredata->auxiliary.check_bytes = 0x01;
3506 pfx_cmd = DASD_ECKD_CCW_PFX_READ;
3507 break;
3508 case DASD_ECKD_CCW_WRITE_TRACK_DATA:
3509 dedata->mask.perm = 0x02;
3510 dedata->attributes.operation = basepriv->attrib.operation;
3511 dedata->blk_size = blksize;
3512 rc = check_XRC_on_prefix(&pfxdata, basedev);
3513 dedata->ga_extended |= 0x42;
3514 lredata->operation.orientation = 0x0;
3515 lredata->operation.operation = 0x3F;
3516 lredata->extended_operation = 0x23;
3517 lredata->auxiliary.check_bytes = 0x2;
3518 pfx_cmd = DASD_ECKD_CCW_PFX;
3519 break;
8fd57520
JH		 3520 case DASD_ECKD_CCW_READ_COUNT_MT:
3521 dedata->mask.perm = 0x1;
3522 dedata->attributes.operation = DASD_BYPASS_CACHE;
3523 dedata->ga_extended |= 0x42;
3524 dedata->blk_size = blksize;
3525 lredata->operation.orientation = 0x2;
3526 lredata->operation.operation = 0x16;
3527 lredata->auxiliary.check_bytes = 0x01;
3528 pfx_cmd = DASD_ECKD_CCW_PFX_READ;
3529 break;
f3eb5384
SW		 3530 default:
3531 DBF_DEV_EVENT(DBF_ERR, basedev,
3532 "prepare itcw, unknown opcode 0x%x", cmd);
3533 BUG();
3534 break;
3535 }
3536 if (rc)
3537 return rc;
3538
3539 dedata->attributes.mode = 0x3; /* ECKD */
3540
3541 heads = basepriv->rdc_data.trk_per_cyl;
3542 begcyl = trk / heads;
3543 beghead = trk % heads;
3544 endcyl = totrk / heads;
3545 endhead = totrk % heads;
3546
3547 /* check for sequential prestage - enhance cylinder range */
3548 if (dedata->attributes.operation == DASD_SEQ_PRESTAGE ||
3549 dedata->attributes.operation == DASD_SEQ_ACCESS) {
3550
3551 if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl)
3552 endcyl += basepriv->attrib.nr_cyl;
3553 else
3554 endcyl = (basepriv->real_cyl - 1);
3555 }
3556
3557 set_ch_t(&dedata->beg_ext, begcyl, beghead);
3558 set_ch_t(&dedata->end_ext, endcyl, endhead);
3559
3560 dedata->ep_format = 0x20; /* records per track is valid */
3561 dedata->ep_rec_per_track = blk_per_trk;
3562
3563 if (rec_on_trk) {
3564 switch (basepriv->rdc_data.dev_type) {
3565 case 0x3390:
3566 dn = ceil_quot(blksize + 6, 232);
3567 d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34);
3568 sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8;
3569 break;
3570 case 0x3380:
3571 d = 7 + ceil_quot(blksize + 12, 32);
3572 sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7;
3573 break;
3574 }
3575 }
3576
8fd57520
JH		 3577 if (cmd == DASD_ECKD_CCW_READ_COUNT_MT) {
3578 lredata->auxiliary.length_valid = 0;
3579 lredata->auxiliary.length_scope = 0;
3580 lredata->sector = 0xff;
3581 } else {
3582 lredata->auxiliary.length_valid = 1;
3583 lredata->auxiliary.length_scope = 1;
3584 lredata->sector = sector;
3585 }
f3eb5384
SW		 3586 lredata->auxiliary.imbedded_ccw_valid = 1;
3587 lredata->length = tlf;
3588 lredata->imbedded_ccw = cmd;
3589 lredata->count = count;
f3eb5384
SW		 3590 set_ch_t(&lredata->seek_addr, begcyl, beghead);
3591 lredata->search_arg.cyl = lredata->seek_addr.cyl;
3592 lredata->search_arg.head = lredata->seek_addr.head;
3593 lredata->search_arg.record = rec_on_trk;
3594
3595 dcw = itcw_add_dcw(itcw, pfx_cmd, 0,
3596 &pfxdata, sizeof(pfxdata), total_data_size);
82a7b955 3597 return PTR_RET(dcw);
f3eb5384
SW		 3598}
3599
3600static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track(
3601 struct dasd_device *startdev,
3602 struct dasd_block *block,
3603 struct request *req,
3604 sector_t first_rec,
3605 sector_t last_rec,
3606 sector_t first_trk,
3607 sector_t last_trk,
3608 unsigned int first_offs,
3609 unsigned int last_offs,
3610 unsigned int blk_per_trk,
3611 unsigned int blksize)
3612{
f3eb5384
SW		 3613 struct dasd_ccw_req *cqr;
3614 struct req_iterator iter;
7988613b 3615 struct bio_vec bv;
f3eb5384
SW		 3616 char *dst;
3617 unsigned int trkcount, ctidaw;
3618 unsigned char cmd;
3619 struct dasd_device *basedev;
3620 unsigned int tlf;
3621 struct itcw *itcw;
3622 struct tidaw *last_tidaw = NULL;
3623 int itcw_op;
3624 size_t itcw_size;
ef19298b
SW		 3625 u8 tidaw_flags;
3626 unsigned int seg_len, part_len, len_to_track_end;
3627 unsigned char new_track;
3628 sector_t recid, trkid;
3629 unsigned int offs;
3630 unsigned int count, count_to_trk_end;
cd10502b 3631 int ret;
f3eb5384
SW		 3632
3633 basedev = block->base;
f3eb5384
SW		 3634 if (rq_data_dir(req) == READ) {
3635 cmd = DASD_ECKD_CCW_READ_TRACK_DATA;
3636 itcw_op = ITCW_OP_READ;
3637 } else if (rq_data_dir(req) == WRITE) {
3638 cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA;
3639 itcw_op = ITCW_OP_WRITE;
3640 } else
3641 return ERR_PTR(-EINVAL);
3642
3643 /* trackbased I/O needs address all memory via TIDAWs,
3644 * not just for 64 bit addresses. This allows us to map
3645 * each segment directly to one tidaw.
ef19298b
SW		 3646 * In the case of write requests, additional tidaws may
3647 * be needed when a segment crosses a track boundary.
f3eb5384
SW		 3648 */
3649 trkcount = last_trk - first_trk + 1;
3650 ctidaw = 0;
3651 rq_for_each_segment(bv, req, iter) {
3652 ++ctidaw;
3653 }
ef19298b
SW		 3654 if (rq_data_dir(req) == WRITE)
3655 ctidaw += (last_trk - first_trk);
f3eb5384
SW		 3656
3657 /* Allocate the ccw request. */
3658 itcw_size = itcw_calc_size(0, ctidaw, 0);
68b781fe 3659 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev);
f3eb5384
SW		 3660 if (IS_ERR(cqr))
3661 return cqr;
3662
f3eb5384
SW		 3663 /* transfer length factor: how many bytes to read from the last track */
3664 if (first_trk == last_trk)
3665 tlf = last_offs - first_offs + 1;
3666 else
3667 tlf = last_offs + 1;
3668 tlf *= blksize;
3669
3670 itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0);
ef19298b 3671 if (IS_ERR(itcw)) {
cd10502b
JL		 3672 ret = -EINVAL;
3673 goto out_error;
ef19298b 3674 }
f3eb5384 3675 cqr->cpaddr = itcw_get_tcw(itcw);
f3eb5384
SW		 3676 if (prepare_itcw(itcw, first_trk, last_trk,
3677 cmd, basedev, startdev,
3678 first_offs + 1,
3679 trkcount, blksize,
3680 (last_rec - first_rec + 1) * blksize,
3681 tlf, blk_per_trk) == -EAGAIN) {
3682 /* Clock not in sync and XRC is enabled.
3683 * Try again later.
3684 */
cd10502b
JL		 3685 ret = -EAGAIN;
3686 goto out_error;
f3eb5384 3687 }
d54cddb6 3688 len_to_track_end = 0;
f3eb5384
SW		 3689 /*
3690 * A tidaw can address 4k of memory, but must not cross page boundaries
3691 * We can let the block layer handle this by setting
3692 * blk_queue_segment_boundary to page boundaries and
3693 * blk_max_segment_size to page size when setting up the request queue.
ef19298b
SW		 3694 * For write requests, a TIDAW must not cross track boundaries, because
3695 * we have to set the CBC flag on the last tidaw for each track.
f3eb5384 3696 */
ef19298b
SW		 3697 if (rq_data_dir(req) == WRITE) {
3698 new_track = 1;
3699 recid = first_rec;
3700 rq_for_each_segment(bv, req, iter) {
7988613b
KO		 3701 dst = page_address(bv.bv_page) + bv.bv_offset;
3702 seg_len = bv.bv_len;
ef19298b
SW		 3703 while (seg_len) {
3704 if (new_track) {
3705 trkid = recid;
3706 offs = sector_div(trkid, blk_per_trk);
3707 count_to_trk_end = blk_per_trk - offs;
3708 count = min((last_rec - recid + 1),
3709 (sector_t)count_to_trk_end);
3710 len_to_track_end = count * blksize;
3711 recid += count;
3712 new_track = 0;
3713 }
3714 part_len = min(seg_len, len_to_track_end);
3715 seg_len -= part_len;
3716 len_to_track_end -= part_len;
3717 /* We need to end the tidaw at track end */
3718 if (!len_to_track_end) {
3719 new_track = 1;
3720 tidaw_flags = TIDAW_FLAGS_INSERT_CBC;
3721 } else
3722 tidaw_flags = 0;
3723 last_tidaw = itcw_add_tidaw(itcw, tidaw_flags,
3724 dst, part_len);
cd10502b
JL		 3725 if (IS_ERR(last_tidaw)) {
3726 ret = -EINVAL;
3727 goto out_error;
3728 }
ef19298b
SW		 3729 dst += part_len;
3730 }
3731 }
3732 } else {
3733 rq_for_each_segment(bv, req, iter) {
7988613b 3734 dst = page_address(bv.bv_page) + bv.bv_offset;
ef19298b 3735 last_tidaw = itcw_add_tidaw(itcw, 0x00,
7988613b 3736 dst, bv.bv_len);
cd10502b
JL		 3737 if (IS_ERR(last_tidaw)) {
3738 ret = -EINVAL;
3739 goto out_error;
3740 }
ef19298b 3741 }
f3eb5384 3742 }
ef19298b
SW		 3743 last_tidaw->flags |= TIDAW_FLAGS_LAST;
3744 last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC;
f3eb5384
SW		 3745 itcw_finalize(itcw);
3746
3747 if (blk_noretry_request(req) ||
3748 block->base->features & DASD_FEATURE_FAILFAST)
3749 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
ef19298b 3750 cqr->cpmode = 1;
f3eb5384
SW		 3751 cqr->startdev = startdev;
3752 cqr->memdev = startdev;
3753 cqr->block = block;
7c8faa86 3754 cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */
c9346151 3755 cqr->lpm = dasd_path_get_ppm(startdev);
1f1ee9ad 3756 cqr->retries = startdev->default_retries;
1aae0560 3757 cqr->buildclk = get_tod_clock();
f3eb5384
SW		 3758 cqr->status = DASD_CQR_FILLED;
3759 return cqr;
cd10502b
JL		 3760out_error:
3761 dasd_sfree_request(cqr, startdev);
3762 return ERR_PTR(ret);
f3eb5384
SW		 3763}
3764
3765static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev,
3766 struct dasd_block *block,
3767 struct request *req)
3768{
ef19298b 3769 int cmdrtd, cmdwtd;
f3eb5384 3770 int use_prefix;
ef19298b 3771 int fcx_multitrack;
45b44d76 3772 struct dasd_eckd_private *private;
f3eb5384
SW		 3773 struct dasd_device *basedev;
3774 sector_t first_rec, last_rec;
3775 sector_t first_trk, last_trk;
3776 unsigned int first_offs, last_offs;
3777 unsigned int blk_per_trk, blksize;
3778 int cdlspecial;
ef19298b 3779 unsigned int data_size;
f3eb5384
SW		 3780 struct dasd_ccw_req *cqr;
3781
3782 basedev = block->base;
543691a4 3783 private = basedev->private;
f3eb5384
SW		 3784
3785 /* Calculate number of blocks/records per track. */
3786 blksize = block->bp_block;
3787 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
6fca97a9
SH		 3788 if (blk_per_trk == 0)
3789 return ERR_PTR(-EINVAL);
f3eb5384 3790 /* Calculate record id of first and last block. */
83096ebf 3791 first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift;
f3eb5384
SW		 3792 first_offs = sector_div(first_trk, blk_per_trk);
3793 last_rec = last_trk =
83096ebf 3794 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift;
f3eb5384
SW		 3795 last_offs = sector_div(last_trk, blk_per_trk);
3796 cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk);
3797
ef19298b
SW		 3798 fcx_multitrack = private->features.feature[40] & 0x20;
3799 data_size = blk_rq_bytes(req);
26a35f37
SW		 3800 if (data_size % blksize)
3801 return ERR_PTR(-EINVAL);
ef19298b
SW		 3802 /* tpm write request add CBC data on each track boundary */
3803 if (rq_data_dir(req) == WRITE)
3804 data_size += (last_trk - first_trk) * 4;
f3eb5384
SW		 3805
3806 /* is read track data and write track data in command mode supported? */
3807 cmdrtd = private->features.feature[9] & 0x20;
3808 cmdwtd = private->features.feature[12] & 0x40;
3809 use_prefix = private->features.feature[8] & 0x01;
3810
3811 cqr = NULL;
3812 if (cdlspecial || dasd_page_cache) {
3813 /* do nothing, just fall through to the cmd mode single case */
ef19298b
SW		 3814 } else if ((data_size <= private->fcx_max_data)
3815 && (fcx_multitrack || (first_trk == last_trk))) {
f3eb5384
SW		 3816 cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req,
3817 first_rec, last_rec,
3818 first_trk, last_trk,
3819 first_offs, last_offs,
3820 blk_per_trk, blksize);
ef19298b
SW		 3821 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) &&
3822 (PTR_ERR(cqr) != -ENOMEM))
f3eb5384
SW		 3823 cqr = NULL;
3824 } else if (use_prefix &&
3825 (((rq_data_dir(req) == READ) && cmdrtd) ||
3826 ((rq_data_dir(req) == WRITE) && cmdwtd))) {
3827 cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req,
3828 first_rec, last_rec,
3829 first_trk, last_trk,
3830 first_offs, last_offs,
3831 blk_per_trk, blksize);
ef19298b
SW		 3832 if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) &&
3833 (PTR_ERR(cqr) != -ENOMEM))
f3eb5384
SW		 3834 cqr = NULL;
3835 }
3836 if (!cqr)
3837 cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req,
3838 first_rec, last_rec,
3839 first_trk, last_trk,
3840 first_offs, last_offs,
3841 blk_per_trk, blksize);
3842 return cqr;
3843}
3844
e4dbb0f2
SH		 3845static struct dasd_ccw_req *dasd_raw_build_cp(struct dasd_device *startdev,
3846 struct dasd_block *block,
3847 struct request *req)
3848{
e4dbb0f2
SH		 3849 unsigned long *idaws;
3850 struct dasd_device *basedev;
3851 struct dasd_ccw_req *cqr;
3852 struct ccw1 *ccw;
3853 struct req_iterator iter;
7988613b 3854 struct bio_vec bv;
e4dbb0f2
SH		 3855 char *dst;
3856 unsigned char cmd;
3857 unsigned int trkcount;
3858 unsigned int seg_len, len_to_track_end;
3859 unsigned int first_offs;
3860 unsigned int cidaw, cplength, datasize;
558b9ef0
SW		 3861 sector_t first_trk, last_trk, sectors;
3862 sector_t start_padding_sectors, end_sector_offset, end_padding_sectors;
e4dbb0f2
SH		 3863 unsigned int pfx_datasize;
3864
3865 /*
3866 * raw track access needs to be mutiple of 64k and on 64k boundary
558b9ef0
SW		 3867 * For read requests we can fix an incorrect alignment by padding
3868 * the request with dummy pages.
e4dbb0f2 3869 */
558b9ef0
SW		 3870 start_padding_sectors = blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK;
3871 end_sector_offset = (blk_rq_pos(req) + blk_rq_sectors(req)) %
3872 DASD_RAW_SECTORS_PER_TRACK;
3873 end_padding_sectors = (DASD_RAW_SECTORS_PER_TRACK - end_sector_offset) %
3874 DASD_RAW_SECTORS_PER_TRACK;
3875 basedev = block->base;
3876 if ((start_padding_sectors || end_padding_sectors) &&
3877 (rq_data_dir(req) == WRITE)) {
3878 DBF_DEV_EVENT(DBF_ERR, basedev,
3879 "raw write not track aligned (%lu,%lu) req %p",
3880 start_padding_sectors, end_padding_sectors, req);
e4dbb0f2
SH		 3881 cqr = ERR_PTR(-EINVAL);
3882 goto out;
3883 }
3884
3885 first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK;
3886 last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) /
3887 DASD_RAW_SECTORS_PER_TRACK;
3888 trkcount = last_trk - first_trk + 1;
3889 first_offs = 0;
e4dbb0f2
SH		 3890
3891 if (rq_data_dir(req) == READ)
3892 cmd = DASD_ECKD_CCW_READ_TRACK;
3893 else if (rq_data_dir(req) == WRITE)
3894 cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK;
3895 else {
3896 cqr = ERR_PTR(-EINVAL);
3897 goto out;
3898 }
3899
3900 /*
3901 * Raw track based I/O needs IDAWs for each page,
3902 * and not just for 64 bit addresses.
3903 */
3904 cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK;
3905
3906 /* 1x prefix + one read/write ccw per track */
3907 cplength = 1 + trkcount;
3908
3909 /*
3910 * struct PFX_eckd_data has up to 2 byte as extended parameter
3911 * this is needed for write full track and has to be mentioned
25985edc 3912 * separately
e4dbb0f2
SH		 3913 * add 8 instead of 2 to keep 8 byte boundary
3914 */
3915 pfx_datasize = sizeof(struct PFX_eckd_data) + 8;
3916
3917 datasize = pfx_datasize + cidaw * sizeof(unsigned long long);
3918
3919 /* Allocate the ccw request. */
3920 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength,
3921 datasize, startdev);
3922 if (IS_ERR(cqr))
3923 goto out;
3924 ccw = cqr->cpaddr;
3925
3926 if (prefix_LRE(ccw++, cqr->data, first_trk, last_trk, cmd,
3927 basedev, startdev, 1 /* format */, first_offs + 1,
3928 trkcount, 0, 0) == -EAGAIN) {
3929 /* Clock not in sync and XRC is enabled.
3930 * Try again later.
3931 */
3932 dasd_sfree_request(cqr, startdev);
3933 cqr = ERR_PTR(-EAGAIN);
3934 goto out;
3935 }
3936
3937 idaws = (unsigned long *)(cqr->data + pfx_datasize);
e4dbb0f2 3938 len_to_track_end = 0;
558b9ef0
SW		 3939 if (start_padding_sectors) {
3940 ccw[-1].flags |= CCW_FLAG_CC;
3941 ccw->cmd_code = cmd;
3942 /* maximum 3390 track size */
3943 ccw->count = 57326;
3944 /* 64k map to one track */
3945 len_to_track_end = 65536 - start_padding_sectors * 512;
3946 ccw->cda = (__u32)(addr_t)idaws;
3947 ccw->flags |= CCW_FLAG_IDA;
3948 ccw->flags |= CCW_FLAG_SLI;
3949 ccw++;
3950 for (sectors = 0; sectors < start_padding_sectors; sectors += 8)
3951 idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE);
3952 }
e4dbb0f2 3953 rq_for_each_segment(bv, req, iter) {
7988613b
KO		 3954 dst = page_address(bv.bv_page) + bv.bv_offset;
3955 seg_len = bv.bv_len;
558b9ef0
SW		 3956 if (cmd == DASD_ECKD_CCW_READ_TRACK)
3957 memset(dst, 0, seg_len);
e4dbb0f2
SH		 3958 if (!len_to_track_end) {
3959 ccw[-1].flags |= CCW_FLAG_CC;
3960 ccw->cmd_code = cmd;
3961 /* maximum 3390 track size */
3962 ccw->count = 57326;
3963 /* 64k map to one track */
3964 len_to_track_end = 65536;
3965 ccw->cda = (__u32)(addr_t)idaws;
3966 ccw->flags |= CCW_FLAG_IDA;
3967 ccw->flags |= CCW_FLAG_SLI;
3968 ccw++;
3969 }
3970 len_to_track_end -= seg_len;
3971 idaws = idal_create_words(idaws, dst, seg_len);
3972 }
558b9ef0
SW		 3973 for (sectors = 0; sectors < end_padding_sectors; sectors += 8)
3974 idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE);
e4dbb0f2
SH		 3975 if (blk_noretry_request(req) ||
3976 block->base->features & DASD_FEATURE_FAILFAST)
3977 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
3978 cqr->startdev = startdev;
3979 cqr->memdev = startdev;
3980 cqr->block = block;
3981 cqr->expires = startdev->default_expires * HZ;
c9346151 3982 cqr->lpm = dasd_path_get_ppm(startdev);
1f1ee9ad 3983 cqr->retries = startdev->default_retries;
1aae0560 3984 cqr->buildclk = get_tod_clock();
e4dbb0f2
SH		 3985 cqr->status = DASD_CQR_FILLED;
3986
3987 if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN)
3988 cqr = NULL;
3989out:
3990 return cqr;
3991}
3992
3993
1da177e4
LT		 3994static int
3995dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req)
3996{
3997 struct dasd_eckd_private *private;
3998 struct ccw1 *ccw;
5705f702 3999 struct req_iterator iter;
7988613b 4000 struct bio_vec bv;
1da177e4
LT		 4001 char *dst, *cda;
4002 unsigned int blksize, blk_per_trk, off;
4003 sector_t recid;
5705f702 4004 int status;
1da177e4
LT		 4005
4006 if (!dasd_page_cache)
4007 goto out;
543691a4 4008 private = cqr->block->base->private;
8e09f215 4009 blksize = cqr->block->bp_block;
1da177e4 4010 blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
83096ebf 4011 recid = blk_rq_pos(req) >> cqr->block->s2b_shift;
1da177e4
LT		 4012 ccw = cqr->cpaddr;
4013 /* Skip over define extent & locate record. */
4014 ccw++;
4015 if (private->uses_cdl == 0 || recid > 2*blk_per_trk)
4016 ccw++;
5705f702 4017 rq_for_each_segment(bv, req, iter) {
7988613b
KO		 4018 dst = page_address(bv.bv_page) + bv.bv_offset;
4019 for (off = 0; off < bv.bv_len; off += blksize) {
1da177e4
LT		 4020 /* Skip locate record. */
4021 if (private->uses_cdl && recid <= 2*blk_per_trk)
4022 ccw++;
4023 if (dst) {
4024 if (ccw->flags & CCW_FLAG_IDA)
4025 cda = *((char **)((addr_t) ccw->cda));
4026 else
4027 cda = (char *)((addr_t) ccw->cda);
4028 if (dst != cda) {
4029 if (rq_data_dir(req) == READ)
7988613b 4030 memcpy(dst, cda, bv.bv_len);
1da177e4
LT		 4031 kmem_cache_free(dasd_page_cache,
4032 (void *)((addr_t)cda & PAGE_MASK));
4033 }
4034 dst = NULL;
4035 }
4036 ccw++;
4037 recid++;
4038 }
4039 }
4040out:
4041 status = cqr->status == DASD_CQR_DONE;
8e09f215 4042 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 4043 return status;
4044}
4045
8e09f215 4046/*
f3eb5384 4047 * Modify ccw/tcw in cqr so it can be started on a base device.
8e09f215
SW		 4048 *
4049 * Note that this is not enough to restart the cqr!
4050 * Either reset cqr->startdev as well (summary unit check handling)
4051 * or restart via separate cqr (as in ERP handling).
4052 */
4053void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr)
4054{
4055 struct ccw1 *ccw;
4056 struct PFX_eckd_data *pfxdata;
f3eb5384
SW		 4057 struct tcw *tcw;
4058 struct tccb *tccb;
4059 struct dcw *dcw;
4060
4061 if (cqr->cpmode == 1) {
4062 tcw = cqr->cpaddr;
4063 tccb = tcw_get_tccb(tcw);
4064 dcw = (struct dcw *)&tccb->tca[0];
4065 pfxdata = (struct PFX_eckd_data *)&dcw->cd[0];
8e09f215
SW		 4066 pfxdata->validity.verify_base = 0;
4067 pfxdata->validity.hyper_pav = 0;
f3eb5384
SW		 4068 } else {
4069 ccw = cqr->cpaddr;
4070 pfxdata = cqr->data;
4071 if (ccw->cmd_code == DASD_ECKD_CCW_PFX) {
4072 pfxdata->validity.verify_base = 0;
4073 pfxdata->validity.hyper_pav = 0;
4074 }
8e09f215
SW		 4075 }
4076}
4077
4078#define DASD_ECKD_CHANQ_MAX_SIZE 4
4079
4080static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base,
4081 struct dasd_block *block,
4082 struct request *req)
4083{
4084 struct dasd_eckd_private *private;
4085 struct dasd_device *startdev;
4086 unsigned long flags;
4087 struct dasd_ccw_req *cqr;
4088
4089 startdev = dasd_alias_get_start_dev(base);
4090 if (!startdev)
4091 startdev = base;
543691a4 4092 private = startdev->private;
8e09f215
SW		 4093 if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE)
4094 return ERR_PTR(-EBUSY);
4095
4096 spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags);
4097 private->count++;
e4dbb0f2
SH		 4098 if ((base->features & DASD_FEATURE_USERAW))
4099 cqr = dasd_raw_build_cp(startdev, block, req);
4100 else
4101 cqr = dasd_eckd_build_cp(startdev, block, req);
8e09f215
SW		 4102 if (IS_ERR(cqr))
4103 private->count--;
4104 spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags);
4105 return cqr;
4106}
4107
4108static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr,
4109 struct request *req)
4110{
4111 struct dasd_eckd_private *private;
4112 unsigned long flags;
4113
4114 spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags);
543691a4 4115 private = cqr->memdev->private;
8e09f215
SW		 4116 private->count--;
4117 spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags);
4118 return dasd_eckd_free_cp(cqr, req);
4119}
4120
1da177e4
LT		 4121static int
4122dasd_eckd_fill_info(struct dasd_device * device,
4123 struct dasd_information2_t * info)
4124{
543691a4 4125 struct dasd_eckd_private *private = device->private;
1da177e4 4126
1da177e4
LT		 4127 info->label_block = 2;
4128 info->FBA_layout = private->uses_cdl ? 0 : 1;
4129 info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL;
543691a4 4130 info->characteristics_size = sizeof(private->rdc_data);
1da177e4 4131 memcpy(info->characteristics, &private->rdc_data,
543691a4 4132 sizeof(private->rdc_data));
4abb08c2
SW		 4133 info->confdata_size = min((unsigned long)private->conf_len,
4134 sizeof(info->configuration_data));
4135 memcpy(info->configuration_data, private->conf_data,
4136 info->confdata_size);
1da177e4
LT		 4137 return 0;
4138}
4139
4140/*
4141 * SECTION: ioctl functions for eckd devices.
4142 */
4143
4144/*
4145 * Release device ioctl.
138c014d 4146 * Buils a channel programm to releases a prior reserved
1da177e4
LT		 4147 * (see dasd_eckd_reserve) device.
4148 */
4149static int
1107ccfb 4150dasd_eckd_release(struct dasd_device *device)
1da177e4 4151{
1da177e4
LT		 4152 struct dasd_ccw_req *cqr;
4153 int rc;
f3eb5384 4154 struct ccw1 *ccw;
f932bcea 4155 int useglobal;
1da177e4
LT		 4156
4157 if (!capable(CAP_SYS_ADMIN))
4158 return -EACCES;
4159
f932bcea 4160 useglobal = 0;
68b781fe 4161 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
1da177e4 4162 if (IS_ERR(cqr)) {
f932bcea
SW		 4163 mutex_lock(&dasd_reserve_mutex);
4164 useglobal = 1;
4165 cqr = &dasd_reserve_req->cqr;
4166 memset(cqr, 0, sizeof(*cqr));
4167 memset(&dasd_reserve_req->ccw, 0,
4168 sizeof(dasd_reserve_req->ccw));
4169 cqr->cpaddr = &dasd_reserve_req->ccw;
4170 cqr->data = &dasd_reserve_req->data;
4171 cqr->magic = DASD_ECKD_MAGIC;
1da177e4 4172 }
f3eb5384
SW		 4173 ccw = cqr->cpaddr;
4174 ccw->cmd_code = DASD_ECKD_CCW_RELEASE;
4175 ccw->flags |= CCW_FLAG_SLI;
4176 ccw->count = 32;
4177 ccw->cda = (__u32)(addr_t) cqr->data;
8e09f215
SW		 4178 cqr->startdev = device;
4179 cqr->memdev = device;
1da177e4 4180 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1c01b8a5 4181 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
336c340b 4182 cqr->retries = 2; /* set retry counter to enable basic ERP */
1da177e4 4183 cqr->expires = 2 * HZ;
1aae0560 4184 cqr->buildclk = get_tod_clock();
1da177e4
LT		 4185 cqr->status = DASD_CQR_FILLED;
4186
4187 rc = dasd_sleep_on_immediatly(cqr);
5a27e60d
SW		 4188 if (!rc)
4189 clear_bit(DASD_FLAG_IS_RESERVED, &device->flags);
1da177e4 4190
f932bcea
SW		 4191 if (useglobal)
4192 mutex_unlock(&dasd_reserve_mutex);
4193 else
4194 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 4195 return rc;
4196}
4197
4198/*
4199 * Reserve device ioctl.
4200 * Options are set to 'synchronous wait for interrupt' and
138c014d
HH		 4201 * 'timeout the request'. This leads to a terminate IO if
4202 * the interrupt is outstanding for a certain time.
1da177e4
LT		 4203 */
4204static int
1107ccfb 4205dasd_eckd_reserve(struct dasd_device *device)
1da177e4 4206{
1da177e4
LT		 4207 struct dasd_ccw_req *cqr;
4208 int rc;
f3eb5384 4209 struct ccw1 *ccw;
f932bcea 4210 int useglobal;
1da177e4
LT		 4211
4212 if (!capable(CAP_SYS_ADMIN))
4213 return -EACCES;
4214
f932bcea 4215 useglobal = 0;
68b781fe 4216 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
1da177e4 4217 if (IS_ERR(cqr)) {
f932bcea
SW		 4218 mutex_lock(&dasd_reserve_mutex);
4219 useglobal = 1;
4220 cqr = &dasd_reserve_req->cqr;
4221 memset(cqr, 0, sizeof(*cqr));
4222 memset(&dasd_reserve_req->ccw, 0,
4223 sizeof(dasd_reserve_req->ccw));
4224 cqr->cpaddr = &dasd_reserve_req->ccw;
4225 cqr->data = &dasd_reserve_req->data;
4226 cqr->magic = DASD_ECKD_MAGIC;
1da177e4 4227 }
f3eb5384
SW		 4228 ccw = cqr->cpaddr;
4229 ccw->cmd_code = DASD_ECKD_CCW_RESERVE;
4230 ccw->flags |= CCW_FLAG_SLI;
4231 ccw->count = 32;
4232 ccw->cda = (__u32)(addr_t) cqr->data;
8e09f215
SW		 4233 cqr->startdev = device;
4234 cqr->memdev = device;
1da177e4 4235 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1c01b8a5 4236 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
336c340b 4237 cqr->retries = 2; /* set retry counter to enable basic ERP */
1da177e4 4238 cqr->expires = 2 * HZ;
1aae0560 4239 cqr->buildclk = get_tod_clock();
1da177e4
LT		 4240 cqr->status = DASD_CQR_FILLED;
4241
4242 rc = dasd_sleep_on_immediatly(cqr);
5a27e60d
SW		 4243 if (!rc)
4244 set_bit(DASD_FLAG_IS_RESERVED, &device->flags);
1da177e4 4245
f932bcea
SW		 4246 if (useglobal)
4247 mutex_unlock(&dasd_reserve_mutex);
4248 else
4249 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 4250 return rc;
4251}
4252
4253/*
4254 * Steal lock ioctl - unconditional reserve device.
138c014d 4255 * Buils a channel programm to break a device's reservation.
1da177e4
LT		 4256 * (unconditional reserve)
4257 */
4258static int
1107ccfb 4259dasd_eckd_steal_lock(struct dasd_device *device)
1da177e4 4260{
1da177e4
LT		 4261 struct dasd_ccw_req *cqr;
4262 int rc;
f3eb5384 4263 struct ccw1 *ccw;
f932bcea 4264 int useglobal;
1da177e4
LT		 4265
4266 if (!capable(CAP_SYS_ADMIN))
4267 return -EACCES;
4268
f932bcea 4269 useglobal = 0;
68b781fe 4270 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device);
1da177e4 4271 if (IS_ERR(cqr)) {
f932bcea
SW		 4272 mutex_lock(&dasd_reserve_mutex);
4273 useglobal = 1;
4274 cqr = &dasd_reserve_req->cqr;
4275 memset(cqr, 0, sizeof(*cqr));
4276 memset(&dasd_reserve_req->ccw, 0,
4277 sizeof(dasd_reserve_req->ccw));
4278 cqr->cpaddr = &dasd_reserve_req->ccw;
4279 cqr->data = &dasd_reserve_req->data;
4280 cqr->magic = DASD_ECKD_MAGIC;
1da177e4 4281 }
f3eb5384
SW		 4282 ccw = cqr->cpaddr;
4283 ccw->cmd_code = DASD_ECKD_CCW_SLCK;
4284 ccw->flags |= CCW_FLAG_SLI;
4285 ccw->count = 32;
4286 ccw->cda = (__u32)(addr_t) cqr->data;
8e09f215
SW		 4287 cqr->startdev = device;
4288 cqr->memdev = device;
1da177e4 4289 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1c01b8a5 4290 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
336c340b 4291 cqr->retries = 2; /* set retry counter to enable basic ERP */
1da177e4 4292 cqr->expires = 2 * HZ;
1aae0560 4293 cqr->buildclk = get_tod_clock();
1da177e4
LT		 4294 cqr->status = DASD_CQR_FILLED;
4295
4296 rc = dasd_sleep_on_immediatly(cqr);
5a27e60d
SW		 4297 if (!rc)
4298 set_bit(DASD_FLAG_IS_RESERVED, &device->flags);
1da177e4 4299
f932bcea
SW		 4300 if (useglobal)
4301 mutex_unlock(&dasd_reserve_mutex);
4302 else
4303 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 4304 return rc;
4305}
4306
196339f1
SW		 4307/*
4308 * SNID - Sense Path Group ID
4309 * This ioctl may be used in situations where I/O is stalled due to
4310 * a reserve, so if the normal dasd_smalloc_request fails, we use the
4311 * preallocated dasd_reserve_req.
4312 */
4313static int dasd_eckd_snid(struct dasd_device *device,
4314 void __user *argp)
4315{
4316 struct dasd_ccw_req *cqr;
4317 int rc;
4318 struct ccw1 *ccw;
4319 int useglobal;
4320 struct dasd_snid_ioctl_data usrparm;
4321
4322 if (!capable(CAP_SYS_ADMIN))
4323 return -EACCES;
4324
4325 if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
4326 return -EFAULT;
4327
4328 useglobal = 0;
4329 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1,
4330 sizeof(struct dasd_snid_data), device);
4331 if (IS_ERR(cqr)) {
4332 mutex_lock(&dasd_reserve_mutex);
4333 useglobal = 1;
4334 cqr = &dasd_reserve_req->cqr;
4335 memset(cqr, 0, sizeof(*cqr));
4336 memset(&dasd_reserve_req->ccw, 0,
4337 sizeof(dasd_reserve_req->ccw));
4338 cqr->cpaddr = &dasd_reserve_req->ccw;
4339 cqr->data = &dasd_reserve_req->data;
4340 cqr->magic = DASD_ECKD_MAGIC;
4341 }
4342 ccw = cqr->cpaddr;
4343 ccw->cmd_code = DASD_ECKD_CCW_SNID;
4344 ccw->flags |= CCW_FLAG_SLI;
4345 ccw->count = 12;
4346 ccw->cda = (__u32)(addr_t) cqr->data;
4347 cqr->startdev = device;
4348 cqr->memdev = device;
4349 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
4350 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
5a27e60d 4351 set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags);
196339f1
SW		 4352 cqr->retries = 5;
4353 cqr->expires = 10 * HZ;
1aae0560 4354 cqr->buildclk = get_tod_clock();
196339f1
SW		 4355 cqr->status = DASD_CQR_FILLED;
4356 cqr->lpm = usrparm.path_mask;
4357
4358 rc = dasd_sleep_on_immediatly(cqr);
4359 /* verify that I/O processing didn't modify the path mask */
4360 if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask))
4361 rc = -EIO;
4362 if (!rc) {
4363 usrparm.data = *((struct dasd_snid_data *)cqr->data);
4364 if (copy_to_user(argp, &usrparm, sizeof(usrparm)))
4365 rc = -EFAULT;
4366 }
4367
4368 if (useglobal)
4369 mutex_unlock(&dasd_reserve_mutex);
4370 else
4371 dasd_sfree_request(cqr, cqr->memdev);
4372 return rc;
4373}
4374
1da177e4
LT		 4375/*
4376 * Read performance statistics
4377 */
4378static int
1107ccfb 4379dasd_eckd_performance(struct dasd_device *device, void __user *argp)
1da177e4 4380{
1da177e4
LT		 4381 struct dasd_psf_prssd_data *prssdp;
4382 struct dasd_rssd_perf_stats_t *stats;
4383 struct dasd_ccw_req *cqr;
4384 struct ccw1 *ccw;
4385 int rc;
4386
68b781fe 4387 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
8e09f215
SW		 4388 (sizeof(struct dasd_psf_prssd_data) +
4389 sizeof(struct dasd_rssd_perf_stats_t)),
1da177e4
LT		 4390 device);
4391 if (IS_ERR(cqr)) {
fc19f381 4392 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
1da177e4
LT		 4393 "Could not allocate initialization request");
4394 return PTR_ERR(cqr);
4395 }
8e09f215
SW		 4396 cqr->startdev = device;
4397 cqr->memdev = device;
1da177e4 4398 cqr->retries = 0;
eb6e199b 4399 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
1da177e4
LT		 4400 cqr->expires = 10 * HZ;
4401
4402 /* Prepare for Read Subsystem Data */
4403 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
8e09f215 4404 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
1da177e4 4405 prssdp->order = PSF_ORDER_PRSSD;
5d67d164 4406 prssdp->suborder = 0x01; /* Performance Statistics */
1da177e4
LT		 4407 prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */
4408
4409 ccw = cqr->cpaddr;
4410 ccw->cmd_code = DASD_ECKD_CCW_PSF;
8e09f215 4411 ccw->count = sizeof(struct dasd_psf_prssd_data);
1da177e4
LT		 4412 ccw->flags |= CCW_FLAG_CC;
4413 ccw->cda = (__u32)(addr_t) prssdp;
4414
4415 /* Read Subsystem Data - Performance Statistics */
4416 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
8e09f215 4417 memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t));
1da177e4
LT		 4418
4419 ccw++;
4420 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
8e09f215 4421 ccw->count = sizeof(struct dasd_rssd_perf_stats_t);
1da177e4
LT		 4422 ccw->cda = (__u32)(addr_t) stats;
4423
1aae0560 4424 cqr->buildclk = get_tod_clock();
1da177e4
LT		 4425 cqr->status = DASD_CQR_FILLED;
4426 rc = dasd_sleep_on(cqr);
4427 if (rc == 0) {
1da177e4
LT		 4428 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
4429 stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1);
1107ccfb
CH		 4430 if (copy_to_user(argp, stats,
4431 sizeof(struct dasd_rssd_perf_stats_t)))
4432 rc = -EFAULT;
1da177e4 4433 }
8e09f215 4434 dasd_sfree_request(cqr, cqr->memdev);
1da177e4
LT		 4435 return rc;
4436}
4437
4438/*
4439 * Get attributes (cache operations)
4440 * Returnes the cache attributes used in Define Extend (DE).
4441 */
4442static int
1107ccfb 4443dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp)
1da177e4 4444{
543691a4 4445 struct dasd_eckd_private *private = device->private;
1107ccfb 4446 struct attrib_data_t attrib = private->attrib;
1da177e4
LT		 4447 int rc;
4448
4449 if (!capable(CAP_SYS_ADMIN))
4450 return -EACCES;
1107ccfb 4451 if (!argp)
1da177e4
LT		 4452 return -EINVAL;
4453
1107ccfb
CH		 4454 rc = 0;
4455 if (copy_to_user(argp, (long *) &attrib,
8e09f215 4456 sizeof(struct attrib_data_t)))
1107ccfb 4457 rc = -EFAULT;
1da177e4
LT		 4458
4459 return rc;
4460}
4461
4462/*
4463 * Set attributes (cache operations)
4464 * Stores the attributes for cache operation to be used in Define Extend (DE).
4465 */
4466static int
1107ccfb 4467dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp)
1da177e4 4468{
543691a4 4469 struct dasd_eckd_private *private = device->private;
1da177e4
LT		 4470 struct attrib_data_t attrib;
4471
4472 if (!capable(CAP_SYS_ADMIN))
4473 return -EACCES;
1107ccfb 4474 if (!argp)
1da177e4
LT		 4475 return -EINVAL;
4476
1107ccfb 4477 if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t)))
1da177e4 4478 return -EFAULT;
1da177e4
LT		 4479 private->attrib = attrib;
4480
fc19f381
SH		 4481 dev_info(&device->cdev->dev,
4482 "The DASD cache mode was set to %x (%i cylinder prestage)\n",
4483 private->attrib.operation, private->attrib.nr_cyl);
1da177e4
LT		 4484 return 0;
4485}
4486
ab1d848f
NH		 4487/*
4488 * Issue syscall I/O to EMC Symmetrix array.
4489 * CCWs are PSF and RSSD
4490 */
4491static int dasd_symm_io(struct dasd_device *device, void __user *argp)
4492{
4493 struct dasd_symmio_parms usrparm;
4494 char *psf_data, *rssd_result;
4495 struct dasd_ccw_req *cqr;
4496 struct ccw1 *ccw;
52898025 4497 char psf0, psf1;
ab1d848f
NH		 4498 int rc;
4499
52898025
NH		 4500 if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
4501 return -EACCES;
4502 psf0 = psf1 = 0;
4503
ab1d848f
NH		 4504 /* Copy parms from caller */
4505 rc = -EFAULT;
4506 if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
4507 goto out;
92d62891 4508 if (is_compat_task()) {
f8b06859 4509 /* Make sure pointers are sane even on 31 bit. */
ab1d848f 4510 rc = -EINVAL;
f8b06859
HC		 4511 if ((usrparm.psf_data >> 32) != 0)
4512 goto out;
4513 if ((usrparm.rssd_result >> 32) != 0)
4514 goto out;
4515 usrparm.psf_data &= 0x7fffffffULL;
4516 usrparm.rssd_result &= 0x7fffffffULL;
ab1d848f 4517 }
ab1d848f
NH		 4518 /* alloc I/O data area */
4519 psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA);
4520 rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA);
4521 if (!psf_data || !rssd_result) {
4522 rc = -ENOMEM;
4523 goto out_free;
4524 }
4525
4526 /* get syscall header from user space */
4527 rc = -EFAULT;
4528 if (copy_from_user(psf_data,
4529 (void __user *)(unsigned long) usrparm.psf_data,
4530 usrparm.psf_data_len))
4531 goto out_free;
52898025
NH		 4532 psf0 = psf_data[0];
4533 psf1 = psf_data[1];
ab1d848f
NH		 4534
4535 /* setup CCWs for PSF + RSSD */
68b781fe 4536 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device);
ab1d848f 4537 if (IS_ERR(cqr)) {
fc19f381 4538 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
ab1d848f
NH		 4539 "Could not allocate initialization request");
4540 rc = PTR_ERR(cqr);
4541 goto out_free;
4542 }
4543
4544 cqr->startdev = device;
4545 cqr->memdev = device;
4546 cqr->retries = 3;
4547 cqr->expires = 10 * HZ;
1aae0560 4548 cqr->buildclk = get_tod_clock();
ab1d848f
NH		 4549 cqr->status = DASD_CQR_FILLED;
4550
4551 /* Build the ccws */
4552 ccw = cqr->cpaddr;
4553
4554 /* PSF ccw */
4555 ccw->cmd_code = DASD_ECKD_CCW_PSF;
4556 ccw->count = usrparm.psf_data_len;
4557 ccw->flags |= CCW_FLAG_CC;
4558 ccw->cda = (__u32)(addr_t) psf_data;
4559
4560 ccw++;
4561
4562 /* RSSD ccw */
4563 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
4564 ccw->count = usrparm.rssd_result_len;
4565 ccw->flags = CCW_FLAG_SLI ;
4566 ccw->cda = (__u32)(addr_t) rssd_result;
4567
4568 rc = dasd_sleep_on(cqr);
4569 if (rc)
4570 goto out_sfree;
4571
4572 rc = -EFAULT;
4573 if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result,
4574 rssd_result, usrparm.rssd_result_len))
4575 goto out_sfree;
4576 rc = 0;
4577
4578out_sfree:
4579 dasd_sfree_request(cqr, cqr->memdev);
4580out_free:
4581 kfree(rssd_result);
4582 kfree(psf_data);
4583out:
52898025
NH		 4584 DBF_DEV_EVENT(DBF_WARNING, device,
4585 "Symmetrix ioctl (0x%02x 0x%02x): rc=%d",
4586 (int) psf0, (int) psf1, rc);
ab1d848f
NH		 4587 return rc;
4588}
4589
1107ccfb 4590static int
8e09f215 4591dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp)
1107ccfb 4592{
8e09f215
SW		 4593 struct dasd_device *device = block->base;
4594
1107ccfb
CH		 4595 switch (cmd) {
4596 case BIODASDGATTR:
4597 return dasd_eckd_get_attrib(device, argp);
4598 case BIODASDSATTR:
4599 return dasd_eckd_set_attrib(device, argp);
4600 case BIODASDPSRD:
4601 return dasd_eckd_performance(device, argp);
4602 case BIODASDRLSE:
4603 return dasd_eckd_release(device);
4604 case BIODASDRSRV:
4605 return dasd_eckd_reserve(device);
4606 case BIODASDSLCK:
4607 return dasd_eckd_steal_lock(device);
196339f1
SW		 4608 case BIODASDSNID:
4609 return dasd_eckd_snid(device, argp);
ab1d848f
NH		 4610 case BIODASDSYMMIO:
4611 return dasd_symm_io(device, argp);
1107ccfb 4612 default:
6b79d14e 4613 return -ENOTTY;
1107ccfb
CH		 4614 }
4615}
4616
445b5b49
HH		 4617/*
4618 * Dump the range of CCWs into 'page' buffer
4619 * and return number of printed chars.
4620 */
4d284cac 4621static int
445b5b49
HH		 4622dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page)
4623{
4624 int len, count;
4625 char *datap;
4626
4627 len = 0;
4628 while (from <= to) {
773bab4a 4629 len += sprintf(page + len, PRINTK_HEADER
445b5b49
HH		 4630 " CCW %p: %08X %08X DAT:",
4631 from, ((int *) from)[0], ((int *) from)[1]);
4632
4633 /* get pointer to data (consider IDALs) */
4634 if (from->flags & CCW_FLAG_IDA)
4635 datap = (char *) *((addr_t *) (addr_t) from->cda);
4636 else
4637 datap = (char *) ((addr_t) from->cda);
4638
4639 /* dump data (max 32 bytes) */
4640 for (count = 0; count < from->count && count < 32; count++) {
4641 if (count % 8 == 0) len += sprintf(page + len, " ");
4642 if (count % 4 == 0) len += sprintf(page + len, " ");
4643 len += sprintf(page + len, "%02x", datap[count]);
4644 }
4645 len += sprintf(page + len, "\n");
4646 from++;
4647 }
4648 return len;
4649}
4650
fc19f381 4651static void
aeec92ca
SH		 4652dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb,
4653 char *reason)
fc19f381
SH		 4654{
4655 u64 *sense;
a5a0061f 4656 u64 *stat;
aeec92ca
SH		 4657
4658 sense = (u64 *) dasd_get_sense(irb);
a5a0061f 4659 stat = (u64 *) &irb->scsw;
fc19f381 4660 if (sense) {
a5a0061f
SW		 4661 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : "
4662 "%016llx %016llx %016llx %016llx",
4663 reason, *stat, *((u32 *) (stat + 1)),
ed3640b2 4664 sense[0], sense[1], sense[2], sense[3]);
fc19f381 4665 } else {
a5a0061f
SW		 4666 DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s",
4667 reason, *stat, *((u32 *) (stat + 1)),
4668 "NO VALID SENSE");
fc19f381
SH		 4669 }
4670}
4671
1da177e4
LT		 4672/*
4673 * Print sense data and related channel program.
4674 * Parts are printed because printk buffer is only 1024 bytes.
4675 */
f3eb5384 4676static void dasd_eckd_dump_sense_ccw(struct dasd_device *device,
8e09f215 4677 struct dasd_ccw_req *req, struct irb *irb)
1da177e4
LT		 4678{
4679 char *page;
445b5b49
HH		 4680 struct ccw1 *first, *last, *fail, *from, *to;
4681 int len, sl, sct;
1da177e4
LT		 4682
4683 page = (char *) get_zeroed_page(GFP_ATOMIC);
4684 if (page == NULL) {
fc19f381
SH		 4685 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
4686 "No memory to dump sense data\n");
1da177e4
LT		 4687 return;
4688 }
445b5b49 4689 /* dump the sense data */
773bab4a 4690 len = sprintf(page, PRINTK_HEADER
1da177e4 4691 " I/O status report for device %s:\n",
2a0217d5 4692 dev_name(&device->cdev->dev));
773bab4a 4693 len += sprintf(page + len, PRINTK_HEADER
a5a0061f
SW		 4694 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X "
4695 "CS:%02X RC:%d\n",
4696 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw),
4697 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw),
4698 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw),
4699 req ? req->intrc : 0);
773bab4a 4700 len += sprintf(page + len, PRINTK_HEADER
1da177e4 4701 " device %s: Failing CCW: %p\n",
2a0217d5 4702 dev_name(&device->cdev->dev),
23d805b6 4703 (void *) (addr_t) irb->scsw.cmd.cpa);
1da177e4
LT		 4704 if (irb->esw.esw0.erw.cons) {
4705 for (sl = 0; sl < 4; sl++) {
773bab4a 4706 len += sprintf(page + len, PRINTK_HEADER
1da177e4
LT		 4707 " Sense(hex) %2d-%2d:",
4708 (8 * sl), ((8 * sl) + 7));
4709
4710 for (sct = 0; sct < 8; sct++) {
4711 len += sprintf(page + len, " %02x",
4712 irb->ecw[8 * sl + sct]);
4713 }
4714 len += sprintf(page + len, "\n");
4715 }
4716
4717 if (irb->ecw[27] & DASD_SENSE_BIT_0) {
4718 /* 24 Byte Sense Data */
773bab4a 4719 sprintf(page + len, PRINTK_HEADER
445b5b49
HH		 4720 " 24 Byte: %x MSG %x, "
4721 "%s MSGb to SYSOP\n",
4722 irb->ecw[7] >> 4, irb->ecw[7] & 0x0f,
4723 irb->ecw[1] & 0x10 ? "" : "no");
1da177e4
LT		 4724 } else {
4725 /* 32 Byte Sense Data */
773bab4a 4726 sprintf(page + len, PRINTK_HEADER
445b5b49
HH		 4727 " 32 Byte: Format: %x "
4728 "Exception class %x\n",
4729 irb->ecw[6] & 0x0f, irb->ecw[22] >> 4);
1da177e4
LT		 4730 }
4731 } else {
773bab4a 4732 sprintf(page + len, PRINTK_HEADER
445b5b49 4733 " SORRY - NO VALID SENSE AVAILABLE\n");
1da177e4 4734 }
773bab4a 4735 printk(KERN_ERR "%s", page);
445b5b49 4736
8e09f215
SW		 4737 if (req) {
4738 /* req == NULL for unsolicited interrupts */
4739 /* dump the Channel Program (max 140 Bytes per line) */
4740 /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */
4741 first = req->cpaddr;
4742 for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++);
4743 to = min(first + 6, last);
773bab4a 4744 len = sprintf(page, PRINTK_HEADER
8e09f215
SW		 4745 " Related CP in req: %p\n", req);
4746 dasd_eckd_dump_ccw_range(first, to, page + len);
773bab4a 4747 printk(KERN_ERR "%s", page);
1da177e4 4748
8e09f215
SW		 4749 /* print failing CCW area (maximum 4) */
4750 /* scsw->cda is either valid or zero */
4751 len = 0;
4752 from = ++to;
23d805b6
PO		 4753 fail = (struct ccw1 *)(addr_t)
4754 irb->scsw.cmd.cpa; /* failing CCW */
8e09f215
SW		 4755 if (from < fail - 2) {
4756 from = fail - 2; /* there is a gap - print header */
773bab4a 4757 len += sprintf(page, PRINTK_HEADER "......\n");
8e09f215
SW		 4758 }
4759 to = min(fail + 1, last);
4760 len += dasd_eckd_dump_ccw_range(from, to, page + len);
4761
4762 /* print last CCWs (maximum 2) */
4763 from = max(from, ++to);
4764 if (from < last - 1) {
4765 from = last - 1; /* there is a gap - print header */
773bab4a 4766 len += sprintf(page + len, PRINTK_HEADER "......\n");
8e09f215
SW		 4767 }
4768 len += dasd_eckd_dump_ccw_range(from, last, page + len);
4769 if (len > 0)
773bab4a 4770 printk(KERN_ERR "%s", page);
1da177e4 4771 }
1da177e4
LT		 4772 free_page((unsigned long) page);
4773}
4774
f3eb5384
SW		 4775
4776/*
4777 * Print sense data from a tcw.
4778 */
4779static void dasd_eckd_dump_sense_tcw(struct dasd_device *device,
4780 struct dasd_ccw_req *req, struct irb *irb)
4781{
4782 char *page;
4783 int len, sl, sct, residual;
f3eb5384 4784 struct tsb *tsb;
ef19298b 4785 u8 *sense, *rcq;
f3eb5384
SW		 4786
4787 page = (char *) get_zeroed_page(GFP_ATOMIC);
4788 if (page == NULL) {
fc19f381 4789 DBF_DEV_EVENT(DBF_WARNING, device, " %s",
f3eb5384
SW		 4790 "No memory to dump sense data");
4791 return;
4792 }
4793 /* dump the sense data */
773bab4a 4794 len = sprintf(page, PRINTK_HEADER
f3eb5384
SW		 4795 " I/O status report for device %s:\n",
4796 dev_name(&device->cdev->dev));
773bab4a 4797 len += sprintf(page + len, PRINTK_HEADER
a5a0061f
SW		 4798 " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X "
4799 "CS:%02X fcxs:%02X schxs:%02X RC:%d\n",
4800 req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw),
4801 scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw),
4802 scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw),
a521b048
SH		 4803 irb->scsw.tm.fcxs,
4804 (irb->scsw.tm.ifob << 7) | irb->scsw.tm.sesq,
a5a0061f 4805 req ? req->intrc : 0);
773bab4a 4806 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4807 " device %s: Failing TCW: %p\n",
4808 dev_name(&device->cdev->dev),
4809 (void *) (addr_t) irb->scsw.tm.tcw);
4810
4811 tsb = NULL;
4812 sense = NULL;
a5a0061f 4813 if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01))
f3eb5384
SW		 4814 tsb = tcw_get_tsb(
4815 (struct tcw *)(unsigned long)irb->scsw.tm.tcw);
4816
b8fde722 4817 if (tsb) {
773bab4a 4818 len += sprintf(page + len, PRINTK_HEADER
f3eb5384 4819 " tsb->length %d\n", tsb->length);
773bab4a 4820 len += sprintf(page + len, PRINTK_HEADER
f3eb5384 4821 " tsb->flags %x\n", tsb->flags);
773bab4a 4822 len += sprintf(page + len, PRINTK_HEADER
f3eb5384 4823 " tsb->dcw_offset %d\n", tsb->dcw_offset);
773bab4a 4824 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4825 " tsb->count %d\n", tsb->count);
4826 residual = tsb->count - 28;
773bab4a 4827 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4828 " residual %d\n", residual);
4829
4830 switch (tsb->flags & 0x07) {
4831 case 1: /* tsa_iostat */
773bab4a 4832 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4833 " tsb->tsa.iostat.dev_time %d\n",
4834 tsb->tsa.iostat.dev_time);
773bab4a 4835 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4836 " tsb->tsa.iostat.def_time %d\n",
4837 tsb->tsa.iostat.def_time);
773bab4a 4838 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4839 " tsb->tsa.iostat.queue_time %d\n",
4840 tsb->tsa.iostat.queue_time);
773bab4a 4841 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4842 " tsb->tsa.iostat.dev_busy_time %d\n",
4843 tsb->tsa.iostat.dev_busy_time);
773bab4a 4844 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4845 " tsb->tsa.iostat.dev_act_time %d\n",
4846 tsb->tsa.iostat.dev_act_time);
4847 sense = tsb->tsa.iostat.sense;
4848 break;
4849 case 2: /* ts_ddpc */
773bab4a 4850 len += sprintf(page + len, PRINTK_HEADER
f3eb5384 4851 " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc);
ef19298b 4852 for (sl = 0; sl < 2; sl++) {
773bab4a 4853 len += sprintf(page + len, PRINTK_HEADER
ef19298b
SW		 4854 " tsb->tsa.ddpc.rcq %2d-%2d: ",
4855 (8 * sl), ((8 * sl) + 7));
4856 rcq = tsb->tsa.ddpc.rcq;
f3eb5384
SW		 4857 for (sct = 0; sct < 8; sct++) {
4858 len += sprintf(page + len, " %02x",
ef19298b 4859 rcq[8 * sl + sct]);
f3eb5384
SW		 4860 }
4861 len += sprintf(page + len, "\n");
4862 }
4863 sense = tsb->tsa.ddpc.sense;
4864 break;
4865 case 3: /* tsa_intrg */
773bab4a
SO		 4866 len += sprintf(page + len, PRINTK_HEADER
4867 " tsb->tsa.intrg.: not supportet yet\n");
f3eb5384
SW		 4868 break;
4869 }
4870
4871 if (sense) {
4872 for (sl = 0; sl < 4; sl++) {
773bab4a 4873 len += sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4874 " Sense(hex) %2d-%2d:",
4875 (8 * sl), ((8 * sl) + 7));
4876 for (sct = 0; sct < 8; sct++) {
4877 len += sprintf(page + len, " %02x",
4878 sense[8 * sl + sct]);
4879 }
4880 len += sprintf(page + len, "\n");
4881 }
4882
4883 if (sense[27] & DASD_SENSE_BIT_0) {
4884 /* 24 Byte Sense Data */
773bab4a 4885 sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4886 " 24 Byte: %x MSG %x, "
4887 "%s MSGb to SYSOP\n",
4888 sense[7] >> 4, sense[7] & 0x0f,
4889 sense[1] & 0x10 ? "" : "no");
4890 } else {
4891 /* 32 Byte Sense Data */
773bab4a 4892 sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4893 " 32 Byte: Format: %x "
4894 "Exception class %x\n",
4895 sense[6] & 0x0f, sense[22] >> 4);
4896 }
4897 } else {
773bab4a 4898 sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4899 " SORRY - NO VALID SENSE AVAILABLE\n");
4900 }
4901 } else {
773bab4a 4902 sprintf(page + len, PRINTK_HEADER
f3eb5384
SW		 4903 " SORRY - NO TSB DATA AVAILABLE\n");
4904 }
773bab4a 4905 printk(KERN_ERR "%s", page);
f3eb5384
SW		 4906 free_page((unsigned long) page);
4907}
4908
4909static void dasd_eckd_dump_sense(struct dasd_device *device,
4910 struct dasd_ccw_req *req, struct irb *irb)
4911{
8fd57520
JH		 4912 u8 *sense = dasd_get_sense(irb);
4913
4914 if (scsw_is_tm(&irb->scsw)) {
4915 /*
4916 * In some cases the 'File Protected' or 'Incorrect Length'
4917 * error might be expected and log messages shouldn't be written
4918 * then. Check if the according suppress bit is set.
4919 */
4920 if (sense && (sense[1] & SNS1_FILE_PROTECTED) &&
4921 test_bit(DASD_CQR_SUPPRESS_FP, &req->flags))
4922 return;
4923 if (scsw_cstat(&irb->scsw) == 0x40 &&
4924 test_bit(DASD_CQR_SUPPRESS_IL, &req->flags))
4925 return;
4926
f3eb5384 4927 dasd_eckd_dump_sense_tcw(device, req, irb);
8fd57520
JH		 4928 } else {
4929 /*
4930 * In some cases the 'No Record Found' error might be expected
4931 * and log messages shouldn't be written then. Check if the
4932 * according suppress bit is set.
4933 */
4934 if (sense && sense[1] & SNS1_NO_REC_FOUND &&
4935 test_bit(DASD_CQR_SUPPRESS_NRF, &req->flags))
4936 return;
4937
f3eb5384 4938 dasd_eckd_dump_sense_ccw(device, req, irb);
8fd57520 4939 }
f3eb5384
SW		 4940}
4941
501183f2 4942static int dasd_eckd_pm_freeze(struct dasd_device *device)
d41dd122
SH		 4943{
4944 /*
4945 * the device should be disconnected from our LCU structure
4946 * on restore we will reconnect it and reread LCU specific
4947 * information like PAV support that might have changed
4948 */
4949 dasd_alias_remove_device(device);
4950 dasd_alias_disconnect_device_from_lcu(device);
4951
4952 return 0;
4953}
4954
501183f2 4955static int dasd_eckd_restore_device(struct dasd_device *device)
d41dd122 4956{
543691a4 4957 struct dasd_eckd_private *private = device->private;
6fca97a9 4958 struct dasd_eckd_characteristics temp_rdc_data;
f9f8d02f 4959 int rc;
d41dd122 4960 struct dasd_uid temp_uid;
a7602f6c 4961 unsigned long flags;
ea4da6ea 4962 unsigned long cqr_flags = 0;
d41dd122 4963
d41dd122 4964 /* Read Configuration Data */
251afd69
SH		 4965 rc = dasd_eckd_read_conf(device);
4966 if (rc) {
4967 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
4968 "Read configuration data failed, rc=%d", rc);
4969 goto out_err;
4970 }
d41dd122 4971
2dedf0d9
SH		 4972 dasd_eckd_get_uid(device, &temp_uid);
4973 /* Generate device unique id */
4974 rc = dasd_eckd_generate_uid(device);
4975 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
d41dd122 4976 if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0)
a7602f6c
SH		 4977 dev_err(&device->cdev->dev, "The UID of the DASD has "
4978 "changed\n");
2dedf0d9 4979 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
d41dd122
SH		 4980 if (rc)
4981 goto out_err;
d41dd122
SH		 4982
4983 /* register lcu with alias handling, enable PAV if this is a new lcu */
f9f8d02f
SH		 4984 rc = dasd_alias_make_device_known_to_lcu(device);
4985 if (rc)
251afd69 4986 goto out_err;
ea4da6ea
SH		 4987
4988 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags);
4989 dasd_eckd_validate_server(device, cqr_flags);
f4ac1d02
SW		 4990
4991 /* RE-Read Configuration Data */
251afd69
SH		 4992 rc = dasd_eckd_read_conf(device);
4993 if (rc) {
4994 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
4995 "Read configuration data failed, rc=%d", rc);
4996 goto out_err2;
4997 }
d41dd122
SH		 4998
4999 /* Read Feature Codes */
68d1e5f0 5000 dasd_eckd_read_features(device);
d41dd122
SH		 5001
5002 /* Read Device Characteristics */
68b781fe 5003 rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
6fca97a9 5004 &temp_rdc_data, 64);
d41dd122 5005 if (rc) {
b8ed5dd5
SH		 5006 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
5007 "Read device characteristic failed, rc=%d", rc);
251afd69 5008 goto out_err2;
d41dd122 5009 }
a7602f6c 5010 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
6fca97a9 5011 memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data));
a7602f6c 5012 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
d41dd122
SH		 5013
5014 /* add device to alias management */
5015 dasd_alias_add_device(device);
5016
5017 return 0;
5018
251afd69
SH		 5019out_err2:
5020 dasd_alias_disconnect_device_from_lcu(device);
d41dd122 5021out_err:
e6125fba 5022 return -1;
d41dd122
SH		 5023}
5024
501183f2
SH		 5025static int dasd_eckd_reload_device(struct dasd_device *device)
5026{
543691a4 5027 struct dasd_eckd_private *private = device->private;
501183f2 5028 int rc, old_base;
2dedf0d9
SH		 5029 char print_uid[60];
5030 struct dasd_uid uid;
5031 unsigned long flags;
501183f2 5032
59a9ed5f
SH		 5033 /*
5034 * remove device from alias handling to prevent new requests
5035 * from being scheduled on the wrong alias device
5036 */
5037 dasd_alias_remove_device(device);
5038
2dedf0d9 5039 spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
501183f2 5040 old_base = private->uid.base_unit_addr;
2dedf0d9
SH		 5041 spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
5042
501183f2
SH		 5043 /* Read Configuration Data */
5044 rc = dasd_eckd_read_conf(device);
5045 if (rc)
5046 goto out_err;
5047
2dedf0d9 5048 rc = dasd_eckd_generate_uid(device);
501183f2
SH		 5049 if (rc)
5050 goto out_err;
501183f2
SH		 5051 /*
5052 * update unit address configuration and
5053 * add device to alias management
5054 */
5055 dasd_alias_update_add_device(device);
5056
2dedf0d9
SH		 5057 dasd_eckd_get_uid(device, &uid);
5058
5059 if (old_base != uid.base_unit_addr) {
5060 if (strlen(uid.vduit) > 0)
5061 snprintf(print_uid, sizeof(print_uid),
5062 "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial,
5063 uid.ssid, uid.base_unit_addr, uid.vduit);
501183f2 5064 else
2dedf0d9
SH		 5065 snprintf(print_uid, sizeof(print_uid),
5066 "%s.%s.%04x.%02x", uid.vendor, uid.serial,
5067 uid.ssid, uid.base_unit_addr);
501183f2
SH		 5068
5069 dev_info(&device->cdev->dev,
5070 "An Alias device was reassigned to a new base device "
2dedf0d9 5071 "with UID: %s\n", print_uid);
501183f2
SH		 5072 }
5073 return 0;
5074
5075out_err:
5076 return -1;
5077}
5078
5db8440c
SH		 5079static int dasd_eckd_read_message_buffer(struct dasd_device *device,
5080 struct dasd_rssd_messages *messages,
5081 __u8 lpum)
5082{
5083 struct dasd_rssd_messages *message_buf;
5084 struct dasd_psf_prssd_data *prssdp;
5db8440c
SH		 5085 struct dasd_ccw_req *cqr;
5086 struct ccw1 *ccw;
5087 int rc;
5088
5db8440c
SH		 5089 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
5090 (sizeof(struct dasd_psf_prssd_data) +
5091 sizeof(struct dasd_rssd_messages)),
5092 device);
5093 if (IS_ERR(cqr)) {
5094 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
5095 "Could not allocate read message buffer request");
5096 return PTR_ERR(cqr);
5097 }
5098
af775210
SH		 5099 cqr->lpm = lpum;
5100retry:
5db8440c
SH		 5101 cqr->startdev = device;
5102 cqr->memdev = device;
5103 cqr->block = NULL;
5db8440c 5104 cqr->expires = 10 * HZ;
5db8440c 5105 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags);
b179b037
SH		 5106 /* dasd_sleep_on_immediatly does not do complex error
5107 * recovery so clear erp flag and set retry counter to
5108 * do basic erp */
5109 clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
5110 cqr->retries = 256;
5db8440c
SH		 5111
5112 /* Prepare for Read Subsystem Data */
5113 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
5114 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
5115 prssdp->order = PSF_ORDER_PRSSD;
5116 prssdp->suborder = 0x03; /* Message Buffer */
5117 /* all other bytes of prssdp must be zero */
5118
5119 ccw = cqr->cpaddr;
5120 ccw->cmd_code = DASD_ECKD_CCW_PSF;
5121 ccw->count = sizeof(struct dasd_psf_prssd_data);
5122 ccw->flags |= CCW_FLAG_CC;
5123 ccw->flags |= CCW_FLAG_SLI;
5124 ccw->cda = (__u32)(addr_t) prssdp;
5125
5126 /* Read Subsystem Data - message buffer */
5127 message_buf = (struct dasd_rssd_messages *) (prssdp + 1);
5128 memset(message_buf, 0, sizeof(struct dasd_rssd_messages));
5129
5130 ccw++;
5131 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
5132 ccw->count = sizeof(struct dasd_rssd_messages);
5133 ccw->flags |= CCW_FLAG_SLI;
5134 ccw->cda = (__u32)(addr_t) message_buf;
5135
5136 cqr->buildclk = get_tod_clock();
5137 cqr->status = DASD_CQR_FILLED;
5138 rc = dasd_sleep_on_immediatly(cqr);
5139 if (rc == 0) {
5140 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
5141 message_buf = (struct dasd_rssd_messages *)
5142 (prssdp + 1);
5143 memcpy(messages, message_buf,
5144 sizeof(struct dasd_rssd_messages));
af775210
SH		 5145 } else if (cqr->lpm) {
5146 /*
5147 * on z/VM we might not be able to do I/O on the requested path
5148 * but instead we get the required information on any path
5149 * so retry with open path mask
5150 */
5151 cqr->lpm = 0;
5152 goto retry;
5db8440c
SH		 5153 } else
5154 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
5155 "Reading messages failed with rc=%d\n"
5156 , rc);
5157 dasd_sfree_request(cqr, cqr->memdev);
5158 return rc;
5159}
5160
5a3b7b11
SH		 5161static int dasd_eckd_query_host_access(struct dasd_device *device,
5162 struct dasd_psf_query_host_access *data)
5163{
5164 struct dasd_eckd_private *private = device->private;
5165 struct dasd_psf_query_host_access *host_access;
5166 struct dasd_psf_prssd_data *prssdp;
5167 struct dasd_ccw_req *cqr;
5168 struct ccw1 *ccw;
5169 int rc;
5170
5171 /* not available for HYPER PAV alias devices */
5172 if (!device->block && private->lcu->pav == HYPER_PAV)
5173 return -EOPNOTSUPP;
5174
5175 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
5176 sizeof(struct dasd_psf_prssd_data) + 1,
5177 device);
5178 if (IS_ERR(cqr)) {
5179 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
5180 "Could not allocate read message buffer request");
5181 return PTR_ERR(cqr);
5182 }
5183 host_access = kzalloc(sizeof(*host_access), GFP_KERNEL | GFP_DMA);
5184 if (!host_access) {
5185 dasd_sfree_request(cqr, device);
5186 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
5187 "Could not allocate host_access buffer");
5188 return -ENOMEM;
5189 }
5190 cqr->startdev = device;
5191 cqr->memdev = device;
5192 cqr->block = NULL;
5193 cqr->retries = 256;
5194 cqr->expires = 10 * HZ;
5195
5196 /* Prepare for Read Subsystem Data */
5197 prssdp = (struct dasd_psf_prssd_data *) cqr->data;
5198 memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data));
5199 prssdp->order = PSF_ORDER_PRSSD;
5200 prssdp->suborder = PSF_SUBORDER_QHA; /* query host access */
5201 /* LSS and Volume that will be queried */
5202 prssdp->lss = private->ned->ID;
5203 prssdp->volume = private->ned->unit_addr;
5204 /* all other bytes of prssdp must be zero */
5205
5206 ccw = cqr->cpaddr;
5207 ccw->cmd_code = DASD_ECKD_CCW_PSF;
5208 ccw->count = sizeof(struct dasd_psf_prssd_data);
5209 ccw->flags |= CCW_FLAG_CC;
5210 ccw->flags |= CCW_FLAG_SLI;
5211 ccw->cda = (__u32)(addr_t) prssdp;
5212
5213 /* Read Subsystem Data - query host access */
5214 ccw++;
5215 ccw->cmd_code = DASD_ECKD_CCW_RSSD;
5216 ccw->count = sizeof(struct dasd_psf_query_host_access);
5217 ccw->flags |= CCW_FLAG_SLI;
5218 ccw->cda = (__u32)(addr_t) host_access;
5219
5220 cqr->buildclk = get_tod_clock();
5221 cqr->status = DASD_CQR_FILLED;
f50af850 5222 rc = dasd_sleep_on_interruptible(cqr);
5a3b7b11
SH		 5223 if (rc == 0) {
5224 *data = *host_access;
5225 } else {
5226 DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
5227 "Reading host access data failed with rc=%d\n",
5228 rc);
5229 rc = -EOPNOTSUPP;
5230 }
5231
5232 dasd_sfree_request(cqr, cqr->memdev);
5233 kfree(host_access);
5234 return rc;
5235}
5236/*
5237 * return number of grouped devices
5238 */
5239static int dasd_eckd_host_access_count(struct dasd_device *device)
5240{
5241 struct dasd_psf_query_host_access *access;
5242 struct dasd_ckd_path_group_entry *entry;
5243 struct dasd_ckd_host_information *info;
5244 int count = 0;
5245 int rc, i;
5246
5247 access = kzalloc(sizeof(*access), GFP_NOIO);
5248 if (!access) {
5249 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
5250 "Could not allocate access buffer");
5251 return -ENOMEM;
5252 }
5253 rc = dasd_eckd_query_host_access(device, access);
5254 if (rc) {
5255 kfree(access);
5256 return rc;
5257 }
5258
5259 info = (struct dasd_ckd_host_information *)
5260 access->host_access_information;
5261 for (i = 0; i < info->entry_count; i++) {
5262 entry = (struct dasd_ckd_path_group_entry *)
5263 (info->entry + i * info->entry_size);
5264 if (entry->status_flags & DASD_ECKD_PG_GROUPED)
5265 count++;
5266 }
5267
5268 kfree(access);
5269 return count;
5270}
5271
5272/*
5273 * write host access information to a sequential file
5274 */
5275static int dasd_hosts_print(struct dasd_device *device, struct seq_file *m)
5276{
5277 struct dasd_psf_query_host_access *access;
5278 struct dasd_ckd_path_group_entry *entry;
5279 struct dasd_ckd_host_information *info;
5280 char sysplex[9] = "";
5281 int rc, i, j;
5282
5283 access = kzalloc(sizeof(*access), GFP_NOIO);
5284 if (!access) {
5285 DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
5286 "Could not allocate access buffer");
5287 return -ENOMEM;
5288 }
5289 rc = dasd_eckd_query_host_access(device, access);
5290 if (rc) {
5291 kfree(access);
5292 return rc;
5293 }
5294
5295 info = (struct dasd_ckd_host_information *)
5296 access->host_access_information;
5297 for (i = 0; i < info->entry_count; i++) {
5298 entry = (struct dasd_ckd_path_group_entry *)
5299 (info->entry + i * info->entry_size);
5300 /* PGID */
5301 seq_puts(m, "pgid ");
5302 for (j = 0; j < 11; j++)
5303 seq_printf(m, "%02x", entry->pgid[j]);
5304 seq_putc(m, '\n');
5305 /* FLAGS */
5306 seq_printf(m, "status_flags %02x\n", entry->status_flags);
5307 /* SYSPLEX NAME */
5308 memcpy(&sysplex, &entry->sysplex_name, sizeof(sysplex) - 1);
5309 EBCASC(sysplex, sizeof(sysplex));
5310 seq_printf(m, "sysplex_name %8s\n", sysplex);
5311 /* SUPPORTED CYLINDER */
5312 seq_printf(m, "supported_cylinder %d\n", entry->cylinder);
5313 /* TIMESTAMP */
5314 seq_printf(m, "timestamp %lu\n", (unsigned long)
5315 entry->timestamp);
5316 }
5317 kfree(access);
5318
5319 return 0;
5320}
5321
5db8440c
SH		 5322/*
5323 * Perform Subsystem Function - CUIR response
5324 */
5325static int
5326dasd_eckd_psf_cuir_response(struct dasd_device *device, int response,
a521b048 5327 __u32 message_id, __u8 lpum)
5db8440c
SH		 5328{
5329 struct dasd_psf_cuir_response *psf_cuir;
a521b048 5330 int pos = pathmask_to_pos(lpum);
5db8440c
SH		 5331 struct dasd_ccw_req *cqr;
5332 struct ccw1 *ccw;
5333 int rc;
5334
5335 cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ ,
5336 sizeof(struct dasd_psf_cuir_response),
5337 device);
5338
5339 if (IS_ERR(cqr)) {
5340 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
5341 "Could not allocate PSF-CUIR request");
5342 return PTR_ERR(cqr);
5343 }
5344
5345 psf_cuir = (struct dasd_psf_cuir_response *)cqr->data;
5346 psf_cuir->order = PSF_ORDER_CUIR_RESPONSE;
5347 psf_cuir->cc = response;
a521b048 5348 psf_cuir->chpid = device->path[pos].chpid;
5db8440c 5349 psf_cuir->message_id = message_id;
a521b048
SH		 5350 psf_cuir->cssid = device->path[pos].cssid;
5351 psf_cuir->ssid = device->path[pos].ssid;
5db8440c
SH		 5352 ccw = cqr->cpaddr;
5353 ccw->cmd_code = DASD_ECKD_CCW_PSF;
5354 ccw->cda = (__u32)(addr_t)psf_cuir;
b179b037 5355 ccw->flags = CCW_FLAG_SLI;
5db8440c
SH		 5356 ccw->count = sizeof(struct dasd_psf_cuir_response);
5357
5358 cqr->startdev = device;
5359 cqr->memdev = device;
5360 cqr->block = NULL;
5361 cqr->retries = 256;
5362 cqr->expires = 10*HZ;
5363 cqr->buildclk = get_tod_clock();
5364 cqr->status = DASD_CQR_FILLED;
b179b037 5365 set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags);
5db8440c
SH		 5366
5367 rc = dasd_sleep_on(cqr);
5368
5369 dasd_sfree_request(cqr, cqr->memdev);
5370 return rc;
5371}
5372
b179b037
SH		 5373/*
5374 * return configuration data that is referenced by record selector
5375 * if a record selector is specified or per default return the
5376 * conf_data pointer for the path specified by lpum
5377 */
5378static struct dasd_conf_data *dasd_eckd_get_ref_conf(struct dasd_device *device,
5379 __u8 lpum,
5380 struct dasd_cuir_message *cuir)
5db8440c 5381{
b179b037
SH		 5382 struct dasd_conf_data *conf_data;
5383 int path, pos;
5db8440c 5384
b179b037
SH		 5385 if (cuir->record_selector == 0)
5386 goto out;
5387 for (path = 0x80, pos = 0; path; path >>= 1, pos++) {
c9346151 5388 conf_data = device->path[pos].conf_data;
b179b037
SH		 5389 if (conf_data->gneq.record_selector ==
5390 cuir->record_selector)
5391 return conf_data;
5db8440c 5392 }
b179b037 5393out:
c9346151 5394 return device->path[pathmask_to_pos(lpum)].conf_data;
5db8440c
SH		 5395}
5396
5397/*
b179b037
SH		 5398 * This function determines the scope of a reconfiguration request by
5399 * analysing the path and device selection data provided in the CUIR request.
5400 * Returns a path mask containing CUIR affected paths for the give device.
5401 *
5402 * If the CUIR request does not contain the required information return the
5403 * path mask of the path the attention message for the CUIR request was reveived
5404 * on.
5405 */
5406static int dasd_eckd_cuir_scope(struct dasd_device *device, __u8 lpum,
5407 struct dasd_cuir_message *cuir)
5408{
5409 struct dasd_conf_data *ref_conf_data;
5410 unsigned long bitmask = 0, mask = 0;
b179b037
SH		 5411 struct dasd_conf_data *conf_data;
5412 unsigned int pos, path;
5413 char *ref_gneq, *gneq;
5414 char *ref_ned, *ned;
5415 int tbcpm = 0;
5416
5417 /* if CUIR request does not specify the scope use the path
5418 the attention message was presented on */
5419 if (!cuir->ned_map ||
5420 !(cuir->neq_map[0] | cuir->neq_map[1] | cuir->neq_map[2]))
5421 return lpum;
5422
b179b037
SH		 5423 /* get reference conf data */
5424 ref_conf_data = dasd_eckd_get_ref_conf(device, lpum, cuir);
5425 /* reference ned is determined by ned_map field */
5426 pos = 8 - ffs(cuir->ned_map);
5427 ref_ned = (char *)&ref_conf_data->neds[pos];
5428 ref_gneq = (char *)&ref_conf_data->gneq;
5429 /* transfer 24 bit neq_map to mask */
5430 mask = cuir->neq_map[2];
5431 mask |= cuir->neq_map[1] << 8;
5432 mask |= cuir->neq_map[0] << 16;
5433
c9346151 5434 for (path = 0; path < 8; path++) {
b179b037
SH		 5435 /* initialise data per path */
5436 bitmask = mask;
c9346151 5437 conf_data = device->path[path].conf_data;
b179b037
SH		 5438 pos = 8 - ffs(cuir->ned_map);
5439 ned = (char *) &conf_data->neds[pos];
5440 /* compare reference ned and per path ned */
5441 if (memcmp(ref_ned, ned, sizeof(*ned)) != 0)
5442 continue;
5443 gneq = (char *)&conf_data->gneq;
5444 /* compare reference gneq and per_path gneq under
5445 24 bit mask where mask bit 0 equals byte 7 of
5446 the gneq and mask bit 24 equals byte 31 */
5447 while (bitmask) {
5448 pos = ffs(bitmask) - 1;
5449 if (memcmp(&ref_gneq[31 - pos], &gneq[31 - pos], 1)
5450 != 0)
5451 break;
5452 clear_bit(pos, &bitmask);
5453 }
5454 if (bitmask)
5455 continue;
5456 /* device and path match the reference values
5457 add path to CUIR scope */
c9346151 5458 tbcpm |= 0x80 >> path;
b179b037
SH		 5459 }
5460 return tbcpm;
5461}
5462
5463static void dasd_eckd_cuir_notify_user(struct dasd_device *device,
a521b048 5464 unsigned long paths, int action)
b179b037 5465{
b179b037
SH		 5466 int pos;
5467
5468 while (paths) {
5469 /* get position of bit in mask */
a521b048 5470 pos = 8 - ffs(paths);
b179b037 5471 /* get channel path descriptor from this position */
b179b037 5472 if (action == CUIR_QUIESCE)
a521b048
SH		 5473 pr_warn("Service on the storage server caused path %x.%02x to go offline",
5474 device->path[pos].cssid,
5475 device->path[pos].chpid);
b179b037 5476 else if (action == CUIR_RESUME)
a521b048
SH		 5477 pr_info("Path %x.%02x is back online after service on the storage server",
5478 device->path[pos].cssid,
5479 device->path[pos].chpid);
5480 clear_bit(7 - pos, &paths);
b179b037
SH		 5481 }
5482}
5483
5484static int dasd_eckd_cuir_remove_path(struct dasd_device *device, __u8 lpum,
5485 struct dasd_cuir_message *cuir)
5486{
5487 unsigned long tbcpm;
5488
5489 tbcpm = dasd_eckd_cuir_scope(device, lpum, cuir);
5490 /* nothing to do if path is not in use */
c9346151 5491 if (!(dasd_path_get_opm(device) & tbcpm))
b179b037 5492 return 0;
c9346151 5493 if (!(dasd_path_get_opm(device) & ~tbcpm)) {
b179b037
SH		 5494 /* no path would be left if the CUIR action is taken
5495 return error */
5496 return -EINVAL;
5497 }
5498 /* remove device from operational path mask */
c9346151
SH		 5499 dasd_path_remove_opm(device, tbcpm);
5500 dasd_path_add_cuirpm(device, tbcpm);
b179b037
SH		 5501 return tbcpm;
5502}
5503
5504/*
5505 * walk through all devices and build a path mask to quiesce them
5506 * return an error if the last path to a device would be removed
5db8440c
SH		 5507 *
5508 * if only part of the devices are quiesced and an error
5509 * occurs no onlining necessary, the storage server will
5510 * notify the already set offline devices again
5511 */
5512static int dasd_eckd_cuir_quiesce(struct dasd_device *device, __u8 lpum,
b179b037 5513 struct dasd_cuir_message *cuir)
5db8440c 5514{
543691a4 5515 struct dasd_eckd_private *private = device->private;
5db8440c 5516 struct alias_pav_group *pavgroup, *tempgroup;
5db8440c 5517 struct dasd_device *dev, *n;
b179b037
SH		 5518 unsigned long paths = 0;
5519 unsigned long flags;
5520 int tbcpm;
5db8440c 5521
5db8440c 5522 /* active devices */
b179b037 5523 list_for_each_entry_safe(dev, n, &private->lcu->active_devices,
5db8440c 5524 alias_list) {
b179b037
SH		 5525 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
5526 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
5527 spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags);
5528 if (tbcpm < 0)
5529 goto out_err;
5530 paths |= tbcpm;
5db8440c 5531 }
5db8440c 5532 /* inactive devices */
b179b037 5533 list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices,
5db8440c 5534 alias_list) {
b179b037
SH		 5535 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
5536 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
5537 spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags);
5538 if (tbcpm < 0)
5539 goto out_err;
5540 paths |= tbcpm;
5db8440c 5541 }
5db8440c
SH		 5542 /* devices in PAV groups */
5543 list_for_each_entry_safe(pavgroup, tempgroup,
5544 &private->lcu->grouplist, group) {
5545 list_for_each_entry_safe(dev, n, &pavgroup->baselist,
5546 alias_list) {
b179b037
SH		 5547 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
5548 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
5549 spin_unlock_irqrestore(
5550 get_ccwdev_lock(dev->cdev), flags);
5551 if (tbcpm < 0)
5552 goto out_err;
5553 paths |= tbcpm;
5db8440c
SH		 5554 }
5555 list_for_each_entry_safe(dev, n, &pavgroup->aliaslist,
5556 alias_list) {
b179b037
SH		 5557 spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags);
5558 tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir);
5559 spin_unlock_irqrestore(
5560 get_ccwdev_lock(dev->cdev), flags);
5561 if (tbcpm < 0)
5562 goto out_err;
5563 paths |= tbcpm;
5db8440c
SH		 5564 }
5565 }
b179b037 5566 /* notify user about all paths affected by CUIR action */
a521b048 5567 dasd_eckd_cuir_notify_user(device, paths, CUIR_QUIESCE);
b179b037
SH		 5568 return 0;
5569out_err:
5570 return tbcpm;
5db8440c
SH		 5571}
5572
5573static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum,
b179b037 5574 struct dasd_cuir_message *cuir)
5db8440c 5575{
543691a4 5576 struct dasd_eckd_private *private = device->private;
5db8440c 5577 struct alias_pav_group *pavgroup, *tempgroup;
5db8440c 5578 struct dasd_device *dev, *n;
b179b037
SH		 5579 unsigned long paths = 0;
5580 int tbcpm;
5db8440c 5581
5db8440c
SH		 5582 /*
5583 * the path may have been added through a generic path event before
5584 * only trigger path verification if the path is not already in use
5585 */
5db8440c
SH		 5586 list_for_each_entry_safe(dev, n,
5587 &private->lcu->active_devices,
5588 alias_list) {
b179b037
SH		 5589 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
5590 paths |= tbcpm;
c9346151
SH		 5591 if (!(dasd_path_get_opm(dev) & tbcpm)) {
5592 dasd_path_add_tbvpm(dev, tbcpm);
5db8440c
SH		 5593 dasd_schedule_device_bh(dev);
5594 }
5595 }
5db8440c
SH		 5596 list_for_each_entry_safe(dev, n,
5597 &private->lcu->inactive_devices,
5598 alias_list) {
b179b037
SH		 5599 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
5600 paths |= tbcpm;
c9346151
SH		 5601 if (!(dasd_path_get_opm(dev) & tbcpm)) {
5602 dasd_path_add_tbvpm(dev, tbcpm);
5db8440c
SH		 5603 dasd_schedule_device_bh(dev);
5604 }
5605 }
5db8440c
SH		 5606 /* devices in PAV groups */
5607 list_for_each_entry_safe(pavgroup, tempgroup,
5608 &private->lcu->grouplist,
5609 group) {
5610 list_for_each_entry_safe(dev, n,
5611 &pavgroup->baselist,
5612 alias_list) {
b179b037
SH		 5613 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
5614 paths |= tbcpm;
c9346151
SH		 5615 if (!(dasd_path_get_opm(dev) & tbcpm)) {
5616 dasd_path_add_tbvpm(dev, tbcpm);
5db8440c
SH		 5617 dasd_schedule_device_bh(dev);
5618 }
5619 }
5620 list_for_each_entry_safe(dev, n,
5621 &pavgroup->aliaslist,
5622 alias_list) {
b179b037
SH		 5623 tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir);
5624 paths |= tbcpm;
c9346151
SH		 5625 if (!(dasd_path_get_opm(dev) & tbcpm)) {
5626 dasd_path_add_tbvpm(dev, tbcpm);
5db8440c
SH		 5627 dasd_schedule_device_bh(dev);
5628 }
5629 }
5630 }
b179b037 5631 /* notify user about all paths affected by CUIR action */
a521b048 5632 dasd_eckd_cuir_notify_user(device, paths, CUIR_RESUME);
b179b037 5633 return 0;
5db8440c
SH		 5634}
5635
5636static void dasd_eckd_handle_cuir(struct dasd_device *device, void *messages,
5637 __u8 lpum)
5638{
5639 struct dasd_cuir_message *cuir = messages;
a521b048 5640 int response;
5db8440c 5641
b179b037
SH		 5642 DBF_DEV_EVENT(DBF_WARNING, device,
5643 "CUIR request: %016llx %016llx %016llx %08x",
5644 ((u64 *)cuir)[0], ((u64 *)cuir)[1], ((u64 *)cuir)[2],
5645 ((u32 *)cuir)[3]);
5db8440c
SH		 5646
5647 if (cuir->code == CUIR_QUIESCE) {
5648 /* quiesce */
a521b048 5649 if (dasd_eckd_cuir_quiesce(device, lpum, cuir))
b179b037
SH		 5650 response = PSF_CUIR_LAST_PATH;
5651 else
5652 response = PSF_CUIR_COMPLETED;
5db8440c
SH		 5653 } else if (cuir->code == CUIR_RESUME) {
5654 /* resume */
a521b048 5655 dasd_eckd_cuir_resume(device, lpum, cuir);
b179b037 5656 response = PSF_CUIR_COMPLETED;
5db8440c
SH		 5657 } else
5658 response = PSF_CUIR_NOT_SUPPORTED;
5659
b179b037 5660 dasd_eckd_psf_cuir_response(device, response,
a521b048 5661 cuir->message_id, lpum);
b179b037
SH		 5662 DBF_DEV_EVENT(DBF_WARNING, device,
5663 "CUIR response: %d on message ID %08x", response,
5664 cuir->message_id);
b179b037
SH		 5665 /* to make sure there is no attention left schedule work again */
5666 device->discipline->check_attention(device, lpum);
5db8440c
SH		 5667}
5668
5669static void dasd_eckd_check_attention_work(struct work_struct *work)
5670{
5671 struct check_attention_work_data *data;
5672 struct dasd_rssd_messages *messages;
5673 struct dasd_device *device;
5674 int rc;
5675
5676 data = container_of(work, struct check_attention_work_data, worker);
5677 device = data->device;
5db8440c
SH		 5678 messages = kzalloc(sizeof(*messages), GFP_KERNEL);
5679 if (!messages) {
5680 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
5681 "Could not allocate attention message buffer");
5682 goto out;
5683 }
5db8440c
SH		 5684 rc = dasd_eckd_read_message_buffer(device, messages, data->lpum);
5685 if (rc)
5686 goto out;
5db8440c
SH		 5687 if (messages->length == ATTENTION_LENGTH_CUIR &&
5688 messages->format == ATTENTION_FORMAT_CUIR)
5689 dasd_eckd_handle_cuir(device, messages, data->lpum);
5db8440c
SH		 5690out:
5691 dasd_put_device(device);
5692 kfree(messages);
5693 kfree(data);
5694}
5695
5696static int dasd_eckd_check_attention(struct dasd_device *device, __u8 lpum)
5697{
5698 struct check_attention_work_data *data;
5699
5700 data = kzalloc(sizeof(*data), GFP_ATOMIC);
5701 if (!data)
5702 return -ENOMEM;
5703 INIT_WORK(&data->worker, dasd_eckd_check_attention_work);
5704 dasd_get_device(device);
5705 data->device = device;
5706 data->lpum = lpum;
5707 schedule_work(&data->worker);
5708 return 0;
5709}
5710
a521b048
SH		 5711static int dasd_eckd_disable_hpf_path(struct dasd_device *device, __u8 lpum)
5712{
5713 if (~lpum & dasd_path_get_opm(device)) {
5714 dasd_path_add_nohpfpm(device, lpum);
5715 dasd_path_remove_opm(device, lpum);
5716 dev_err(&device->cdev->dev,
5717 "Channel path %02X lost HPF functionality and is disabled\n",
5718 lpum);
5719 return 1;
5720 }
5721 return 0;
5722}
5723
5724static void dasd_eckd_disable_hpf_device(struct dasd_device *device)
5725{
5726 struct dasd_eckd_private *private = device->private;
5727
5728 dev_err(&device->cdev->dev,
5729 "High Performance FICON disabled\n");
5730 private->fcx_max_data = 0;
5731}
5732
5733static int dasd_eckd_hpf_enabled(struct dasd_device *device)
5734{
5735 struct dasd_eckd_private *private = device->private;
5736
5737 return private->fcx_max_data ? 1 : 0;
5738}
5739
5740static void dasd_eckd_handle_hpf_error(struct dasd_device *device,
5741 struct irb *irb)
5742{
5743 struct dasd_eckd_private *private = device->private;
5744
5745 if (!private->fcx_max_data) {
5746 /* sanity check for no HPF, the error makes no sense */
5747 DBF_DEV_EVENT(DBF_WARNING, device, "%s",
5748 "Trying to disable HPF for a non HPF device");
5749 return;
5750 }
5751 if (irb->scsw.tm.sesq == SCSW_SESQ_DEV_NOFCX) {
5752 dasd_eckd_disable_hpf_device(device);
5753 } else if (irb->scsw.tm.sesq == SCSW_SESQ_PATH_NOFCX) {
5754 if (dasd_eckd_disable_hpf_path(device, irb->esw.esw1.lpum))
5755 return;
5756 dasd_eckd_disable_hpf_device(device);
5757 dasd_path_set_tbvpm(device,
5758 dasd_path_get_hpfpm(device));
5759 }
5760 /*
5761 * prevent that any new I/O ist started on the device and schedule a
5762 * requeue of existing requests
5763 */
5764 dasd_device_set_stop_bits(device, DASD_STOPPED_NOT_ACC);
5765 dasd_schedule_requeue(device);
5766}
5767
d41dd122 5768static struct ccw_driver dasd_eckd_driver = {
3bda058b
SO		 5769 .driver = {
5770 .name = "dasd-eckd",
5771 .owner = THIS_MODULE,
5772 },
d41dd122
SH		 5773 .ids = dasd_eckd_ids,
5774 .probe = dasd_eckd_probe,
5775 .remove = dasd_generic_remove,
5776 .set_offline = dasd_generic_set_offline,
5777 .set_online = dasd_eckd_set_online,
5778 .notify = dasd_generic_notify,
a4d26c6a 5779 .path_event = dasd_generic_path_event,
4679e893 5780 .shutdown = dasd_generic_shutdown,
d41dd122
SH		 5781 .freeze = dasd_generic_pm_freeze,
5782 .thaw = dasd_generic_restore_device,
5783 .restore = dasd_generic_restore_device,
a23ed009 5784 .uc_handler = dasd_generic_uc_handler,
420f42ec 5785 .int_class = IRQIO_DAS,
d41dd122 5786};
f3eb5384 5787
1da177e4
LT		 5788/*
5789 * max_blocks is dependent on the amount of storage that is available
5790 * in the static io buffer for each device. Currently each device has
5791 * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has
5792 * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use
5793 * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In
5794 * addition we have one define extent ccw + 16 bytes of data and one
5795 * locate record ccw + 16 bytes of data. That makes:
5796 * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum.
5797 * We want to fit two into the available memory so that we can immediately
5798 * start the next request if one finishes off. That makes 249.5 blocks
5799 * for one request. Give a little safety and the result is 240.
5800 */
5801static struct dasd_discipline dasd_eckd_discipline = {
5802 .owner = THIS_MODULE,
5803 .name = "ECKD",
5804 .ebcname = "ECKD",
ef19298b 5805 .max_blocks = 190,
1da177e4 5806 .check_device = dasd_eckd_check_characteristics,
8e09f215 5807 .uncheck_device = dasd_eckd_uncheck_device,
1da177e4 5808 .do_analysis = dasd_eckd_do_analysis,
a4d26c6a 5809 .verify_path = dasd_eckd_verify_path,
d42e1712 5810 .basic_to_ready = dasd_eckd_basic_to_ready,
8e09f215 5811 .online_to_ready = dasd_eckd_online_to_ready,
daa991bf 5812 .basic_to_known = dasd_eckd_basic_to_known,
1da177e4
LT		 5813 .fill_geometry = dasd_eckd_fill_geometry,
5814 .start_IO = dasd_start_IO,
5815 .term_IO = dasd_term_IO,
8e09f215 5816 .handle_terminated_request = dasd_eckd_handle_terminated_request,
1da177e4 5817 .format_device = dasd_eckd_format_device,
8fd57520 5818 .check_device_format = dasd_eckd_check_device_format,
1da177e4
LT		 5819 .erp_action = dasd_eckd_erp_action,
5820 .erp_postaction = dasd_eckd_erp_postaction,
5a27e60d 5821 .check_for_device_change = dasd_eckd_check_for_device_change,
8e09f215
SW		 5822 .build_cp = dasd_eckd_build_alias_cp,
5823 .free_cp = dasd_eckd_free_alias_cp,
1da177e4 5824 .dump_sense = dasd_eckd_dump_sense,
fc19f381 5825 .dump_sense_dbf = dasd_eckd_dump_sense_dbf,
1da177e4 5826 .fill_info = dasd_eckd_fill_info,
1107ccfb 5827 .ioctl = dasd_eckd_ioctl,
d41dd122
SH		 5828 .freeze = dasd_eckd_pm_freeze,
5829 .restore = dasd_eckd_restore_device,
501183f2 5830 .reload = dasd_eckd_reload_device,
2dedf0d9 5831 .get_uid = dasd_eckd_get_uid,
f1633031 5832 .kick_validate = dasd_eckd_kick_validate_server,
5db8440c 5833 .check_attention = dasd_eckd_check_attention,
5a3b7b11
SH		 5834 .host_access_count = dasd_eckd_host_access_count,
5835 .hosts_print = dasd_hosts_print,
a521b048
SH		 5836 .handle_hpf_error = dasd_eckd_handle_hpf_error,
5837 .disable_hpf = dasd_eckd_disable_hpf_device,
5838 .hpf_enabled = dasd_eckd_hpf_enabled,
5839 .reset_path = dasd_eckd_reset_path,
1da177e4
LT		 5840};
5841
5842static int __init
5843dasd_eckd_init(void)
5844{
736e6ea0
SO		 5845 int ret;
5846
1da177e4 5847 ASCEBC(dasd_eckd_discipline.ebcname, 4);
f932bcea
SW		 5848 dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req),
5849 GFP_KERNEL | GFP_DMA);
5850 if (!dasd_reserve_req)
5851 return -ENOMEM;
a4d26c6a
SW		 5852 path_verification_worker = kmalloc(sizeof(*path_verification_worker),
5853 GFP_KERNEL | GFP_DMA);
5854 if (!path_verification_worker) {
5855 kfree(dasd_reserve_req);
5856 return -ENOMEM;
5857 }
558b9ef0
SW		 5858 rawpadpage = (void *)__get_free_page(GFP_KERNEL);
5859 if (!rawpadpage) {
5860 kfree(path_verification_worker);
5861 kfree(dasd_reserve_req);
5862 return -ENOMEM;
5863 }
736e6ea0
SO		 5864 ret = ccw_driver_register(&dasd_eckd_driver);
5865 if (!ret)
5866 wait_for_device_probe();
a4d26c6a
SW		 5867 else {
5868 kfree(path_verification_worker);
f932bcea 5869 kfree(dasd_reserve_req);
558b9ef0 5870 free_page((unsigned long)rawpadpage);
a4d26c6a 5871 }
736e6ea0 5872 return ret;
1da177e4
LT		 5873}
5874
5875static void __exit
5876dasd_eckd_cleanup(void)
5877{
5878 ccw_driver_unregister(&dasd_eckd_driver);
a4d26c6a 5879 kfree(path_verification_worker);
f932bcea 5880 kfree(dasd_reserve_req);
558b9ef0 5881 free_page((unsigned long)rawpadpage);
1da177e4
LT		 5882}
5883
5884module_init(dasd_eckd_init);
5885module_exit(dasd_eckd_cleanup);
Linux 6.x block layer and io_uring tree(s)