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